1. A multi-shaft numerical control machine tool with double stations is characterized by comprising a machine body, a main shaft supporting frame, a first electric main shaft, a second electric main shaft, a first Z-axis driving device, a second Z-axis driving device, a first workbench, a second workbench, a swing driving device and a rotation driving device, wherein the main shaft supporting frame is arranged on the machine body; the first workbench and the second workbench are respectively arranged below the first electric spindle and the second electric spindle and respectively rotate around the axis C while swinging around the axis A under the action of the swinging driving device and the rotating driving device; the first electric spindle and the first workbench can perform relative reciprocating linear motion in the X-axis direction and the Y-axis direction, and the second electric spindle and the second workbench can perform relative reciprocating linear motion in the X-axis direction and the Y-axis direction.

2. The multi-axis numerical control machine tool with double stations as claimed in claim 1, wherein the spindle supporting frame comprises a first support, a second support and a cross beam, the first support and the second support are oppositely arranged, the first support is arranged on a first side edge of the machine body, and the second support is arranged on a second side edge of the machine body; the first support is provided with a first Y-direction guide rail, the second support is provided with a second Y-direction guide rail, one end of the cross beam is installed on the first Y-direction guide rail, the other end of the cross beam is installed on the second Y-direction guide rail, and the cross beam can reciprocate in the Y-axis direction along the first Y-direction guide rail and the second Y-direction guide rail.

3. The multi-axis numerical control machine tool with double stations according to claim 2, characterized in that a first Y-axis driving device is further provided on the first support, and a second Y-axis driving device is further provided on the second support; and the first Y-axis driving device and the second Y-axis driving device synchronously drive the cross beam to reciprocate along the Y axis.

4. The multi-axis numerical control machine tool with double stations according to claim 3, wherein the cross beam is provided with an X-direction guide rail, the first motorized spindle and the second motorized spindle are mounted on the cross beam side by side through a sliding movement device, the sliding movement device comprises a Z-axis connecting plate, a first Z-direction guide rail, a second Z-direction guide rail, a first sliding bottom plate and a second sliding bottom plate, and the Z-axis connecting plate acts on the X-direction guide rail and is driven by an X-axis driving device to reciprocate along the X-axis direction; the first Z-direction guide rail and the second Z-direction guide rail are arranged on the Z-axis connecting plate in parallel, the first sliding bottom plate acts on the first Z-direction guide rail and reciprocates along the Z-axis direction under the action of the first Z-axis driving device, and the first electric spindle is arranged on the first sliding bottom plate; the second sliding bottom plate acts on the second Z-direction guide rail and reciprocates along the Z-axis direction under the action of the second Z-axis driving device, and the second electric spindle is arranged on the second sliding bottom plate.

5. The multi-axis numerical control machine tool with double stations according to claim 3, wherein the cross beam is provided with an X-direction guide rail, the first motorized spindle and the second motorized spindle are mounted on the cross beam side by side through a sliding movement device, the sliding movement device comprises a first Z-axis connecting plate, a second Z-axis connecting plate, a first Z-direction guide rail, a second Z-direction guide rail, a first sliding bottom plate and a second sliding bottom plate, the first Z-axis connecting plate and the second Z-axis connecting plate respectively act on the X-direction guide rail and are respectively driven by a first X-axis driving device and a second X-axis driving device to reciprocate along the X-axis direction; the first Z-direction guide rail is arranged on the first Z-axis connecting plate, the first sliding bottom plate acts on the first Z-direction guide rail and can reciprocate along the Z-axis direction under the action of the first Z-axis driving device, and the first electric spindle is arranged on the first sliding bottom plate; the second Z-direction guide rail is arranged on the second Z-axis connecting plate, the second sliding bottom plate acts on the second Z-direction guide rail and can reciprocate along the Z-axis direction under the action of the second Z-axis driving device, and the second electric spindle is arranged on the second sliding bottom plate.

6. The multi-axis numerical control machine tool with double stations according to any one of claims 1 to 5, wherein the rotary driving device comprises a first rotary driving part and a second rotary driving part, the first worktable is mounted on the first rotary driving part and can rotate around the C axis under the action of the first rotary driving part, and the second worktable is mounted on the second rotary driving part and can rotate around the C axis under the action of the second rotary driving part; the swing driving device comprises a first swing driving part and a second swing driving part, wherein the first rotation driving part is arranged at the output end of the first swing driving part and can swing around an A axis under the action of the first swing driving part; the second rotary driving part is arranged at the output end of the second swing driving part and can swing around the shaft A under the action of the second swing driving part.

7. The multi-axis numerical control machine tool with two stations according to claim 6, wherein the first swing driving part is installed on the machine bed or the first support, and the second swing driving part is installed on the machine bed or the second support.

8. The multi-axis numerical control machine tool with double stations according to claim 6, wherein the first rotary driving part, the second rotary driving part, the first swing driving part and the second swing driving part are all controlled by a machine tool numerical control system, and the machine tool numerical control system performs workpiece position compensation by controlling the relative rotation positions of the first rotary driving part and the second rotary driving part and the relative swing positions of the first swing driving part and the second swing driving part.

9. The multi-axis numerical control machine tool with double stations according to any one of claims 2 to 4, wherein the rotary driving device comprises a first rotary driving part and a second rotary driving part, the first worktable is mounted on the first rotary driving part and can rotate around the C axis under the action of the first rotary driving part, and the second worktable is mounted on the second rotary driving part and can rotate around the C axis under the action of the second rotary driving part; the swing driving device comprises a first swing driving part and a second swing driving part, the first swing driving part is installed on the first support, and the second swing driving part is installed on the second support; a bridge plate is arranged between the first swing driving portion and the second swing driving portion, the first rotation driving portion and the second rotation driving portion are arranged on the bridge plate side by side, and the first swing driving portion and the second swing driving portion synchronously drive the first rotation driving portion and the second rotation driving portion to swing together around the shaft A.

10. The multi-axis numerical control machine tool with double stations according to any one of claims 2 to 4, wherein the rotary driving device comprises a first rotary driving part and a second rotary driving part, the first worktable is mounted on the first rotary driving part and can rotate around the C axis under the action of the first rotary driving part, and the second worktable is mounted on the second rotary driving part and can rotate around the C axis under the action of the second rotary driving part; the swing driving device is arranged on the first support, the output end of the swing driving device is connected with a bridge plate, and the other end of the bridge plate is supported on the second support and can swing around the shaft A under the action of the swing driving device; the first rotary driving part and the second rotary driving part are arranged on the bridge plate side by side and can swing around the shaft A along with the bridge plate.

Background

In the field of machining, with increasing competition, higher requirements are put forward on machining equipment, and not only higher machining precision and machining efficiency are required, but also machining cost is required to be saved. The main factors influencing the processing cost at the present stage comprise labor cost, equipment cost, factory building cost and the like, the reduction of the labor cost can be realized by adopting automatic equipment, the reduction of the equipment cost and the factory building cost needs to improve the output capacity of a single device on one hand, and the occupied area of the single device is reduced as much as possible on the other hand. The structural design of double main shafts and double stations in the existing numerical control machine tool is undoubtedly an effective means capable of ensuring the output capacity of a single machine tool and reducing the occupied area, but most of the existing double main shafts and double stations are three-axis machine tools and cannot realize the processing of complex products. Although part of five-axis numerical control machine tools also have a double-station machining function, the double main shafts and the double work tables move synchronously, and only double-station synchronous machining can be performed, so that the requirements on the consistency of workpiece blanks and the consistency of workpiece installation are high, otherwise, the consistency of machining precision is difficult to ensure; meanwhile, the requirements on the assembly precision, the cutter precision and the consistency of the machine tool are very high, the processing preparation time is long, and the efficient processing is not facilitated.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a double-spindle double-station numerical control machine tool with double spindles capable of being controlled by independent motion, which can realize independent tool setting and automatic compensation of double-station machining tools, has low requirements on the consistency of machine tool assembly precision and tool precision, effectively shortens the machining preparation time and improves the machining efficiency.

In order to solve the technical problems, the invention is realized by the following technical scheme: a multi-shaft numerical control machine tool with double stations comprises a machine tool body, a main shaft supporting frame, a first electric main shaft, a second electric main shaft, a first Z-axis driving device, a second Z-axis driving device, a first workbench, a second workbench, a swing driving device and a rotation driving device, wherein the main shaft supporting frame is arranged on the machine tool body; the first workbench and the second workbench are respectively arranged below the first electric spindle and the second electric spindle and respectively rotate around the axis C while swinging around the axis A under the action of the swinging driving device and the rotating driving device; the first electric spindle and the first workbench can perform relative reciprocating linear motion in the X-axis direction and the Y-axis direction, and the second electric spindle and the second workbench can perform relative reciprocating linear motion in the X-axis direction and the Y-axis direction.

According to the multi-shaft numerical control machine tool with the double stations, the main shaft supporting frame comprises a first support, a second support and a cross beam, the first support and the second support are oppositely arranged, the first support is arranged on the first side edge of the machine body, and the second support is arranged on the second side edge of the machine body; the first support is provided with a first Y-direction guide rail, the second support is provided with a second Y-direction guide rail, one end of the cross beam is installed on the first Y-direction guide rail, the other end of the cross beam is installed on the second Y-direction guide rail, and the cross beam can reciprocate in the Y-axis direction along the first Y-direction guide rail and the second Y-direction guide rail.

According to the multi-axis numerical control machine tool with the double stations, the first support is further provided with the first Y-axis driving device, and the second support is further provided with the second Y-axis driving device; and the first Y-axis driving device and the second Y-axis driving device synchronously drive the cross beam to reciprocate along the Y axis.

According to the multi-shaft numerical control machine tool with the double stations, the X-direction guide rail is arranged on the cross beam, the first electric main shaft and the second electric main shaft are arranged on the cross beam side by side through the sliding moving device, the sliding moving device comprises the Z-axis connecting plate, the first Z-direction guide rail, the second Z-direction guide rail, the first sliding bottom plate and the second sliding bottom plate, and the Z-axis connecting plate acts on the X-direction guide rail and is driven by the X-axis driving device to reciprocate along the X-axis direction; the first Z-direction guide rail and the second Z-direction guide rail are arranged on the Z-axis connecting plate in parallel, the first sliding bottom plate acts on the first Z-direction guide rail and reciprocates along the Z-axis direction under the action of the first Z-axis driving device, and the first electric spindle is arranged on the first sliding bottom plate; the second sliding bottom plate acts on the second Z-direction guide rail and reciprocates along the Z-axis direction under the action of the second Z-axis driving device, and the second electric spindle is arranged on the second sliding bottom plate.

According to the multi-shaft numerical control machine tool with the double stations, the X-direction guide rail is arranged on the cross beam, the first electric main shaft and the second electric main shaft are arranged on the cross beam side by side through the sliding movement device, the sliding movement device comprises a first Z-axis connecting plate, a second Z-axis connecting plate, a first Z-direction guide rail, a second Z-direction guide rail, a first sliding bottom plate and a second sliding bottom plate, and the first Z-axis connecting plate and the second Z-axis connecting plate respectively act on the X-direction guide rail and are respectively driven by the first X-axis driving device and the second X-axis driving device to reciprocate along the X-axis direction; the first Z-direction guide rail is arranged on the first Z-axis connecting plate, the first sliding bottom plate acts on the first Z-direction guide rail and can reciprocate along the Z-axis direction under the action of the first Z-axis driving device, and the first electric spindle is arranged on the first sliding bottom plate; the second Z-direction guide rail is arranged on the second Z-axis connecting plate, the second sliding bottom plate acts on the second Z-direction guide rail and can reciprocate along the Z-axis direction under the action of the second Z-axis driving device, and the second electric spindle is arranged on the second sliding bottom plate.

The rotary driving device comprises a first rotary driving part and a second rotary driving part, the first workbench is mounted on the first rotary driving part and can rotate around the C axis under the action of the first rotary driving part, and the second workbench is mounted on the second rotary driving part and can rotate around the C axis under the action of the second rotary driving part; the swing driving device comprises a first swing driving part and a second swing driving part, wherein the first rotation driving part is arranged at the output end of the first swing driving part and can swing around an A axis under the action of the first swing driving part; the second rotary driving part is arranged at the output end of the second swing driving part and can swing around the shaft A under the action of the second swing driving part.

According to the multi-shaft numerical control machine tool with the double stations, the first swing driving part is installed on the machine tool body or the first support, and the second swing driving part is installed on the machine tool body or the second support.

The rotary driving device comprises a first rotary driving part and a second rotary driving part, the first workbench is mounted on the first rotary driving part and can rotate around the C axis under the action of the first rotary driving part, and the second workbench is mounted on the second rotary driving part and can rotate around the C axis under the action of the second rotary driving part; the swing driving device comprises a first swing driving part and a second swing driving part, the first swing driving part is installed on the first support, and the second swing driving part is installed on the second support; a bridge plate is arranged between the first swing driving portion and the second swing driving portion, the first rotation driving portion and the second rotation driving portion are arranged on the bridge plate side by side, and the first swing driving portion and the second swing driving portion synchronously drive the first rotation driving portion and the second rotation driving portion to swing together around the shaft A.

The rotary driving device comprises a first rotary driving part and a second rotary driving part, the first workbench is mounted on the first rotary driving part and can rotate around the C axis under the action of the first rotary driving part, and the second workbench is mounted on the second rotary driving part and can rotate around the C axis under the action of the second rotary driving part; the swing driving device is arranged on the first support, the output end of the swing driving device is connected with a bridge plate, and the other end of the bridge plate is supported on the second support and can swing around the shaft A under the action of the swing driving device; the first rotary driving part and the second rotary driving part are arranged on the bridge plate side by side and can swing around the shaft A along with the bridge plate.

Compared with the prior art, the invention has the beneficial effects that: the invention adopts an independently controlled double-Z-axis structure, can realize the respective tool setting of two main shaft tools, automatically compensate according to the difference value of the two tools, reduce the requirements on assembly precision and tool consistency, reduce the processing preparation time and improve the processing efficiency. In addition, the design of the independent double-shaft rotary table can realize the relative rotation of the positions of the two working tables, the machining angle can be automatically adjusted according to the actual condition and the mounting position of a workpiece blank, the compensation of blank errors and workpiece clamping errors is realized, the machining precision is effectively improved, and the machining consistency of the workpiece is ensured; and by matching with a double-X-axis design, five-axis linkage machining of different workpieces or double processes can be simultaneously performed, and the machining efficiency is effectively improved.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic view of a spindle mounting structure of embodiment 1, embodiment 3, and embodiment 4 of the present invention.

Fig. 3 is a schematic structural diagram of a turntable in embodiment 1 and embodiment 2 of the invention.

Fig. 4 is a schematic structural diagram of embodiment 2 of the present invention.

Fig. 5 is a schematic view of a spindle mounting structure in embodiment 2 of the present invention.

Fig. 6 is a schematic structural diagram of embodiment 3 of the present invention.

Fig. 7 is a schematic structural view of a turntable according to embodiment 3 of the present invention.

Fig. 8 is a schematic structural diagram of embodiment 4 of the present invention.

Fig. 9 is a schematic structural view of a turntable according to embodiment 4 of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. Furthermore, the terms "mounted" and "connected" are to be construed broadly, e.g., as a fixed connection, a removable connection, or an integral connection; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1.

As shown in fig. 1, the multi-axis numerical control machine tool with two stations of the present invention comprises a machine bed 1, a first support 2, a second support 3 and a cross beam 4, wherein the first support 2 and the second support 3 are oppositely arranged, the first support 2 is installed on a first side edge of the machine bed 1, and the second support 3 is installed on a second side edge of the machine bed 1. The first support 2 is provided with a first Y-direction guide rail 21, the second support 3 is provided with a second Y-direction guide rail 31, one end of the cross beam 4 is installed on the first Y-direction guide rail 21, and the other end of the cross beam 4 is installed on the second Y-direction guide rail 31; the first support 2 is also provided with a first Y-axis driving device 22, and the second support 3 is also provided with a second Y-axis driving device 32; the first Y-axis driving device 22 and the second Y-axis driving device 32 synchronously drive the cross beam 4 to reciprocate in the Y-axis direction.

As shown in fig. 1 and 2, the front side surface and the upper top surface of the cross beam 4 are respectively provided with an X-direction guide rail 41, and the Z-axis connecting plate 5 acts on the X-direction guide rail 41 and is driven by an X-axis driving device 42 to reciprocate in the X-axis direction. A first Z-direction guide rail 51 and a second Z-direction guide rail 52 which are parallel to each other are arranged on the Z-axis connecting plate 5, a first sliding bottom plate 61 acts on the first Z-direction guide rail 51 and reciprocates along the Z-axis direction under the action of a first Z-axis driving device 53, and a first electric spindle 6 is arranged on the first sliding bottom plate 61; the second slide base plate 71 acts on the second Z-direction guide rail 52 and reciprocates in the Z-axis direction by the second Z-axis drive device 54, and the second electric spindle 7 is mounted on the second slide base plate 71.

As shown in fig. 1 and 3, a first turntable 8 and a second turntable 9 are respectively disposed below the first electric spindle 6 and the second electric spindle 7, the first turntable 8 includes a first table 81, a first rotation driving portion 82 and a first swing driving portion 83, the first swing driving portion 83 is mounted on the first support 2, the first rotation driving portion 82 is mounted at an output end of the first swing driving portion 83, and can swing around the a axis under the action of the first swing driving portion 83; the first table 81 is mounted on the first rotary drive unit 82, and is rotatable about the C axis by the first rotary drive unit 82, and is also swingable about the a axis together with the first rotary drive unit 82. The second turntable 9 comprises a second worktable 91, a second rotary driving part 92 and a second swing driving part 93, the second swing driving part 93 is mounted on the second support 3, the second rotary driving part 92 is mounted at the output end of the second swing driving part 93 and can swing around the axis a under the action of the second swing driving part 93; the second table 91 is mounted on the second rotation driving unit 92 so as to be rotatable about the C axis by the second rotation driving unit 92, and swingable about the a axis together with the second rotation driving unit 92.

During working, the three-axis linear motion of the first electric spindle 6 and the first rotary table 8 form a first five-axis machining station, and the three-axis linear motion of the second electric spindle 7 and the second rotary table 9 form a second five-axis machining station. During machining, two five-axis machining stations can move synchronously, and double-station synchronous machining is realized; before machining, the first electric spindle 6 and the second electric spindle 7 can be independently controlled to perform tool setting, and tool compensation is performed by adjusting the relative positions of the first electric spindle 6 and the first electric spindle 7 in the Z direction; if the tools of the two spindles are worn differently during machining, compensation can be performed by adjusting the relative positions of the first electric spindle 6 and the first electric spindle 7 in the Z direction. In addition, in order to avoid clamping errors and blank errors, compensation can be performed by adjusting the relative rotation and swing positions of the first workbench 81 and the second workbench 91 before machining, so that the clamping difficulty is greatly reduced, and the machining precision can be effectively improved.

Example 2.

As shown in fig. 4, the multi-axis numerical control machine tool with two stations of the present invention comprises a machine bed 1, a first support 2, a second support 3 and a cross beam 4, wherein the first support 2 and the second support 3 are oppositely disposed, the first support 2 is installed on a first side edge of the machine bed 1, and the second support 3 is installed on a second side edge of the machine bed 1. The first support 2 is provided with a first Y-direction guide rail 21, the second support 3 is provided with a second Y-direction guide rail 31, one end of the cross beam 4 is installed on the first Y-direction guide rail 21, and the other end of the cross beam 4 is installed on the second Y-direction guide rail 31; the first support 2 is also provided with a first Y-axis driving device 22, and the second support 3 is also provided with a second Y-axis driving device 32; the first Y-axis driving device 22 and the second Y-axis driving device 32 synchronously drive the cross beam 4 to reciprocate in the Y-axis direction.

As shown in fig. 4 and 5, the front side surface and the upper top surface of the cross member 4 are provided with X-direction rails 41, respectively, and a first Z-axis connecting plate 55 and a second Z-axis connecting plate 56 act on the X-direction rails 41, respectively. The front side surface of the cross beam 4 is further provided with a first X-axis driving device 43 and a second X-axis driving device 44, respectively, the first X-axis driving device 43 drives the first Z-axis connecting plate 55 to reciprocate along the X-axis direction, and the second X-axis driving device 44 drives the second Z-axis connecting plate 56 to reciprocate along the X-axis direction. A first Z-direction guide rail 51 is arranged on the first Z-axis connecting plate 55, a first sliding bottom plate 61 acts on the first Z-direction guide rail 51 and reciprocates along the Z-axis direction under the action of a first Z-axis driving device 53, and the first electric spindle 6 is arranged on the first sliding bottom plate 61; the second Z-axis connecting plate 56 is provided with a second Z-direction rail 52, a second slide base plate 71 acts on the second Z-direction rail 52 and reciprocates in the Z-axis direction by a second Z-axis driving device 54, and the second electric spindle 7 is attached to the second slide base plate 71.

As shown in fig. 3 and 4, a first turntable 8 and a second turntable 9 are respectively disposed below the first electric spindle 6 and the second electric spindle 7, the first turntable 8 includes a first table 81, a first rotation driving portion 82 and a first swing driving portion 83, the first swing driving portion 83 is mounted on the first support 2, the first rotation driving portion 82 is mounted at an output end of the first swing driving portion 83, and can swing around the a axis under the action of the first swing driving portion 83; the first table 81 is mounted on the first rotary drive unit 82, and is rotatable about the C axis by the first rotary drive unit 82, and is also swingable about the a axis together with the first rotary drive unit 82. The second turntable 9 comprises a second worktable 91, a second rotary driving part 92 and a second swing driving part 93, the second swing driving part 93 is mounted on the second support 3, the second rotary driving part 92 is mounted at the output end of the second swing driving part 93 and can swing around the axis a under the action of the second swing driving part 93; the second table 91 is mounted on the second rotation driving unit 92 so as to be rotatable about the C axis by the second rotation driving unit 92, and swingable about the a axis together with the second rotation driving unit 92.

During working, the three-axis linear motion of the first electric spindle 6 and the first rotary table 8 form a first five-axis machining station, and the three-axis linear motion of the second electric spindle 7 and the second rotary table 9 form a second five-axis machining station. During machining, two five-axis machining stations can be independently controlled, and machining or double-sequence machining of two different workpieces is realized; and the double-station machining can be carried out by synchronous motion, so that the machining efficiency is improved. In the synchronous machining, as in embodiment 1, tool or workpiece compensation may be performed by adjusting the relative position of the first electric spindle 6 and the first electric spindle 7 in the Z direction and the relative rotational and oscillating positions of the first table 81 and the second table 91.

Example 3.

As shown in fig. 6, the multi-axis numerical control machine tool with two stations of the present invention comprises a machine bed 1, a first support 2, a second support 3 and a cross beam 4, wherein the first support 2 and the second support 3 are oppositely disposed, the first support 2 is installed on a first side edge of the machine bed 1, and the second support 3 is installed on a second side edge of the machine bed 1. The first support 2 is provided with a first Y-direction guide rail 21, the second support 3 is provided with a second Y-direction guide rail 31, one end of the cross beam 4 is installed on the first Y-direction guide rail 21, and the other end of the cross beam 4 is installed on the second Y-direction guide rail 31; the first support 2 is also provided with a first Y-axis driving device 22, and the second support 3 is also provided with a second Y-axis driving device 32; the first Y-axis driving device 22 and the second Y-axis driving device 32 synchronously drive the cross beam 4 to reciprocate in the Y-axis direction.

As shown in fig. 2 and 6, the front side surface and the upper top surface of the cross beam 4 are respectively provided with an X-direction guide rail 41, and the Z-axis connecting plate 5 acts on the X-direction guide rail 41 and is driven by an X-axis driving device 42 to reciprocate in the X-axis direction. A first Z-direction guide rail 51 and a second Z-direction guide rail 52 which are parallel to each other are arranged on the Z-axis connecting plate 5, a first sliding bottom plate 61 acts on the first Z-direction guide rail 51 and reciprocates along the Z-axis direction under the action of a first Z-axis driving device 53, and a first electric spindle 6 is arranged on the first sliding bottom plate 61; the second slide base plate 71 acts on the second Z-direction guide rail 52 and reciprocates in the Z-axis direction by the second Z-axis drive device 54, and the second electric spindle 7 is mounted on the second slide base plate 71.

As shown in fig. 6 and 7, a dual-drive rotary table 10 is disposed below the first electric spindle 6 and the second electric spindle 7, and includes a first swing driving portion 101, a second swing driving portion 102, a bridge plate 103, a first rotary driving portion 104, a second rotary driving portion 105, a first table 106, and a second table 107, wherein the first swing driving portion 101 is mounted on the first support 2, and the second swing driving portion 102 is mounted on the second support 3; one end of the bridge plate 103 is connected to the output end of the first swing driving portion 101, the other end of the bridge plate 103 is connected to the output end of the second swing driving portion 102, and the first swing driving portion 101 and the second swing driving portion 102 synchronously drive the bridge plate 103 to swing around the axis a. The first rotation driving part 104 and the second rotation driving part 105 are provided side by side on the bridge plate 103, and are swingable about the a axis together with the bridge plate 103. The first table 106 is mounted on the first rotation driving unit 104 and can rotate around the C-axis by the first rotation driving unit 104; the second table 107 is attached to the second rotation driving unit 105 and is rotatable around the C axis by the second rotation driving unit 105.

During operation, the three-axis linear motion of the first motorized spindle 6 and the two-axis rotary motion of the first workbench 106 form a first five-axis machining station, and the three-axis linear motion of the second motorized spindle 7 and the two-axis rotary motion of the second workbench 107 form a second five-axis machining station. During machining, two five-axis machining stations can perform double-station synchronous machining; before machining, the first electric spindle 6 and the second electric spindle 7 can be independently controlled to perform tool setting, and tool compensation is performed by adjusting the relative positions of the first electric spindle 6 and the first electric spindle 7 in the Z direction; if the tools of the two spindles are worn differently during machining, compensation can be performed by adjusting the relative positions of the first electric spindle 6 and the first electric spindle 7 in the Z direction.

Example 4.

As shown in fig. 8, the multi-axis numerical control machine tool with two stations of the present invention comprises a machine bed 1, a first support 2, a second support 3 and a cross beam 4, wherein the first support 2 and the second support 3 are oppositely disposed, the first support 2 is installed on a first side edge of the machine bed 1, and the second support 3 is installed on a second side edge of the machine bed 1. The first support 2 is provided with a first Y-direction guide rail 21, the second support 3 is provided with a second Y-direction guide rail 31, one end of the cross beam 4 is installed on the first Y-direction guide rail 21, and the other end of the cross beam 4 is installed on the second Y-direction guide rail 31; the first support 2 is also provided with a first Y-axis driving device 22, and the second support 3 is also provided with a second Y-axis driving device 32; the first Y-axis driving device 22 and the second Y-axis driving device 32 synchronously drive the cross beam 4 to reciprocate in the Y-axis direction.

As shown in fig. 2 and 8, the front side surface and the upper top surface of the cross beam 4 are respectively provided with an X-direction guide rail 41, and the Z-axis connecting plate 5 acts on the X-direction guide rail 41 and is driven by an X-axis driving device 42 to reciprocate in the X-axis direction. A first Z-direction guide rail 51 and a second Z-direction guide rail 52 which are parallel to each other are arranged on the Z-axis connecting plate 5, a first sliding bottom plate 61 acts on the first Z-direction guide rail 51 and reciprocates along the Z-axis direction under the action of a first Z-axis driving device 53, and a first electric spindle 6 is arranged on the first sliding bottom plate 61; the second slide base plate 71 acts on the second Z-direction guide rail 52 and reciprocates in the Z-axis direction by the second Z-axis drive device 54, and the second electric spindle 7 is mounted on the second slide base plate 71.

Referring to fig. 8 and 9, a double-station rotary table 11 is disposed below the first electric spindle 6 and the second electric spindle 7, and includes a swing driving device 111, a bridge plate 112, a first rotary driving portion 113, a second rotary driving portion 114, a first table 115, and a second table 116, the swing driving device 111 is mounted on the first support 2, one end of the bridge plate 112 is connected to an output end of the swing driving device 111, the other end of the bridge plate is supported on the second support 3 through a rotary supporting device, and the swing driving device 111 drives the bridge plate 112 to swing around the a axis. The first rotation driving unit 113 and the second rotation driving unit 114 are arranged side by side on the bridge plate 112 and are swingable about the a axis together with the bridge plate 112. The first table 115 is mounted on the first rotation driving unit 113 and is rotatable around the C-axis by the first rotation driving unit 113; the second table 116 is attached to the second rotation driving unit 114 and is rotatable about the C axis by the second rotation driving unit 114.

During operation, the three-axis linear motion of the first motorized spindle 6 and the two-axis rotary motion of the first worktable 115 form a first five-axis machining station, and the three-axis linear motion of the second motorized spindle 7 and the two-axis rotary motion of the second worktable 116 form a second five-axis machining station. During machining, two five-axis machining stations can perform double-station synchronous machining; before machining, the first electric spindle 6 and the second electric spindle 7 can be independently controlled to perform tool setting, and tool compensation is performed by adjusting the relative positions of the first electric spindle 6 and the first electric spindle 7 in the Z direction; if the tools of the two spindles are worn differently during machining, compensation can be performed by adjusting the relative positions of the first electric spindle 6 and the first electric spindle 7 in the Z direction.

Although the present invention has been described in detail hereinabove, the present invention is not limited thereto, and those skilled in the art can make various modifications in accordance with the principle of the present invention. Thus, modifications made in accordance with the principles of the present invention should be understood to fall within the scope of the present invention.