1. The utility model provides a milling fixture for use with the CNC cooperation, fixed part of treating processing which characterized in that: the milling fixture comprises a plate body and a plurality of positioning round holes formed in the plate body, wherein the positioning round holes are at least of two types with different apertures, and fixing holes for fixing and positioning with a CNC are formed in the middle of the plate body.

2. A milling method characterized by: the milling method comprises the following steps:

s1: obtaining a part to be machined from a sawing machine, and drawing a straight edge of the part to be machined by hand milling;

s2: providing a vice and a CNC (computer numerical control), clamping a part to be machined by using the vice, and polishing a plane of the part to be machined by using the CNC;

s3: roughly milling the front side of the part to be machined by using CNC (computer numerical control), simultaneously reserving process edges on two sides, and milling at least one reverse side positioning hole on each process edge on the two sides;

s4: providing the milling fixture and the process block as claimed in claim 1, turning over the part to be processed, positioning a positioning hole on the back side and a positioning round hole on the milling fixture through a positioning pin, pressing the process block on the process edge, and roughing the back side of the part to be processed;

s5: taking down the part to be processed, and carrying out heat treatment on the part to be processed;

s6: positioning a positioning hole on the back side and a positioning round hole on the milling fixture through a positioning pin, pressing a process block on the process edge, performing secondary rough machining and finish machining on the back side of the part to be machined, and milling at least one positioning hole on the front side on the process edges on the two sides;

s7: and turning the part to be machined, positioning the front positioning hole and the positioning round hole on the milling fixture through a positioning pin, and performing secondary rough machining and finish machining on the front of the part to be machined to finish milling of the part to be machined.

3. The milling method according to claim 2, characterized in that: and each milling clamp is used for clamping at least two parts to be machined.

4. The milling method according to claim 2, characterized in that: the front positioning holes on the process edges on the two sides have different apertures, and the back positioning holes on the process edges on the two sides have different apertures.

5. The milling method according to claim 4, characterized in that: the two technical edges are respectively provided with a front positioning hole or a back positioning hole, wherein the aperture of one positioning hole is 5mm, and the aperture of the other positioning hole is 5.5 mm.

6. The milling method according to claim 5, characterized in that: the front positioning holes and the back positioning holes on the process edges on the two sides are arranged at intervals in the height direction.

7. The milling method according to claim 2, characterized in that: the front positioning hole and the back positioning hole are symmetrically arranged along the axis of the part to be processed.

8. The milling method according to claim 2, characterized in that: in the steps S3 and S4, the margin of the single side is opened roughly for 0.3mm, and in the step S6, the margin of the single side is opened roughly for two times for 0.02 mm.

9. The milling method according to claim 2, characterized in that: and in the steps S3 and S4, controlling the connecting position between the shape of the part to be processed and the process bar to be at least 3mm when the shape is roughly milled.

10. The milling method according to claim 2, characterized in that: in step S6, a semi-finishing step is further included between the secondary rough-opening and finishing.

Background

In the traditional CNC milling process, when the same positioning hole can be used for parts with different sizes or parts with the same specification, the positioning hole needs to be milled again every time as the clamps are not classified, sorted, arranged and stored. Therefore, a large amount of repetitive labor is brought to operators, resources are wasted, and the production cost is increased. In addition, for parts needing to be clamped twice, according to a consistent processing thought, the processing sequence is as follows: rough machining of the back face, milling of a positioning hole (vice clamp), rough machining of the front face (pin hole positioning), milling of a pin hole (vice clamp), secondary rough opening and finish machining of the back face, milling of the positioning hole (pin hole positioning), secondary rough opening and finish machining of the front face. Therefore, positioning holes need to be milled for many times, and the front and back sides are difficult to ensure to be uniform in reference.

In view of the above, there is a need for an improved milling fixture to solve the above problems.

Disclosure of Invention

The invention aims to provide a milling clamp to solve the problems that the existing milling method does not have a corresponding milling clamp, so that positioning holes need to be milled for multiple times, and the consistency of positive and negative references is difficult to ensure.

In order to achieve the purpose, the invention provides a milling fixture which is used for being matched with a CNC (computer numerical control) to fix a part to be machined, the milling fixture comprises a plate body and a plurality of positioning round holes formed in the plate body, at least two positioning round holes with different apertures are formed in the positioning round holes, and a fixing hole used for being fixed and positioned with the CNC is formed in the middle of the plate body.

The invention also provides a milling method, which comprises the following steps:

s1: obtaining a part to be machined from a sawing machine, and drawing a straight edge of the part to be machined by hand milling;

s2: providing a vice and a CNC (computer numerical control), clamping a part to be machined by using the vice, and polishing a plane of the part to be machined by using the CNC;

s3: roughly milling the front side of the part to be machined by using CNC (computer numerical control), simultaneously reserving process edges on two sides, and milling at least one reverse side positioning hole on each process edge on the two sides;

s4: providing the milling fixture and the process block, turning over the part to be machined, positioning a positioning hole on the back side and a positioning round hole on the milling fixture through a positioning pin, pressing the process block on the process edge, and roughing the back side of the part to be machined;

s5: taking down the part to be processed, and carrying out heat treatment on the part to be processed;

s6: positioning a positioning hole on the back side and a positioning round hole on the milling fixture through a positioning pin, pressing a process block on the process edge, performing secondary rough machining and finish machining on the back side of the part to be machined, and milling at least one positioning hole on the front side on the process edges on the two sides;

s7: and turning the part to be machined, positioning the front positioning hole and the positioning round hole on the milling fixture through a positioning pin, and performing secondary rough machining and finish machining on the front of the part to be machined to finish milling of the part to be machined.

As a further improvement of the invention, each milling fixture clamps at least two parts to be machined.

As a further improvement of the invention, the front positioning holes on the process edges on the two sides have different apertures, and the back positioning holes on the process edges on the two sides have different apertures.

As a further improvement of the invention, the two technical edges are respectively provided with a front positioning hole or a back positioning hole, wherein the aperture of one of the positioning holes is 5mm, and the aperture of the other positioning hole is 5.5 mm.

As a further improvement of the invention, the front positioning holes and the back positioning holes on the process edges at two sides are arranged at intervals in the height direction.

As a further improvement of the invention, the front positioning hole and the back positioning hole are symmetrically arranged along the axis of the part to be processed.

As a further improvement of the invention, in the step S3 and the step S4, the margin of the single side is opened roughly by 0.3mm, and in the step S6, the margin of the single side is opened roughly by 0.02mm twice.

As a further improvement of the invention, in the step S3 and the step S4, when the outline is roughly milled, the connection part between the outline of the part to be processed and the process bar is controlled to be at least 3 mm.

As a further improvement of the present invention, step S6 further includes a semi-finishing step between the secondary rough cutting and finishing.

The invention has the beneficial effects that: according to the milling fixture, the plurality of positioning round holes are formed, so that the positioning round holes can be called according to different parts.

Drawings

FIG. 1 is a schematic view of a milling fixture of the present invention;

FIG. 2 is a schematic structural diagram of a part to be machined milled by the milling method of the present invention;

fig. 3 is a flow chart of the milling method of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 to 3, the present invention provides a milling fixture 100 for cooperating with a CNC to fix a part 200 to be machined.

Milling fixture 100 includes the plate body 1, sets up a plurality of location round holes 2 on the plate body 1, location round hole 2 has two kinds that the aperture is different at least, the middle part of plate body 1 is equipped with and is used for fixing with the fixed orifices 3 of location with the CNC. In this embodiment, the plurality of positioning circular holes 2 are arrayed around the center of the fixing hole 3. The milling fixture 100 thus configured can accommodate batch processing of parts of different outer dimensions.

One corner of the plate body 1 is provided with a cutting positioning part 4 for determining the placing direction of the plate body 1.

In addition, the milling fixture 100 has a three-dimensional model stored in the CNC, which can be called up during programming, so that the positioning round hole 2 on the milling fixture 100 can be selected and used as required.

The embodiment provides a milling method, which comprises the following steps:

s1: obtaining a part 200 to be processed from a sawing machine, and drawing a straight edge of the part 200 to be processed by hand milling; since the precision of the part to be machined 200 obtained from the sawing machine is insufficient, the part cannot be directly clamped by using a vice;

s2: providing a vice and a CNC (computer numerical control), clamping the part 200 to be machined by using the vice, polishing the plane of the part 200 to be machined by using the CNC, and milling two surfaces of the part 200 to be machined;

s3: roughly milling the front side of the part 200 to be machined by using CNC (computer numerical control), simultaneously reserving process edges 6 on two sides, and milling at least one reverse side positioning hole on each process edge 6 on the two sides; the reverse side positioning hole is used for positioning when the reverse side of the part to be processed 200 is rough; the rough opening has no precision requirement and can be in place;

s4: providing the milling fixture 100 and the process block, turning over the part 200 to be processed, positioning a reverse side positioning hole and the positioning round hole 2 on the milling fixture 100 through a positioning pin, pressing the process block on the process edge 6, and roughing the reverse side of the part 200 to be processed; the rough opening has no precision requirement and can be in place;

s5: taking down the part 200 to be processed, and carrying out heat treatment on the part 200 to be processed;

s6: positioning a back side positioning hole and a positioning round hole 2 on the milling fixture 100 through a positioning pin, pressing a process block on the process edge 6, performing secondary rough machining and finish machining on the back side of the part 200 to be machined, and milling at least one front side positioning hole 5 on the process edges 6 on two sides respectively; the reverse side positioning hole in this step and the positioning on the milling fixture 100 are coarse positioning, the front side positioning hole 5 and the reverse side positioning hole are symmetrically arranged along the axis of the part to be processed 200, the opening directions are opposite, and the axis of the part to be processed 200 is symmetrically arranged in the horizontal direction, namely, the front side and the reverse side are concentric;

s7: turning over the part 200 to be machined, positioning a front positioning hole 5 and a positioning round hole 2 on the milling fixture 100 through a positioning pin, and performing secondary rough machining and finish machining on the front surface of the part 200 to be machined to complete milling of the part 200 to be machined; in the case of process accuracy requirements of 0.01mm or more, a semi-finishing step is also included between the secondary rough-cutting and finishing.

The finishing in step S7 may separate the technical edge 6 from the finished part.

And after the machining is finished, the machined parts can be submitted for inspection.

In this embodiment, two finished parts are milled out of one part 200 to be machined, however, in other embodiments, at least two parts 200 to be machined are clamped by each of the milling fixtures 100. The number of the parts to be machined 200 can be controlled according to the size and the need of the milling fixture 100.

The diameters of the front positioning holes 5 on the process edges 6 on the two sides are different, and the diameters of the back positioning holes on the process edges 6 on the two sides are different. In this embodiment, the two process edges 6 are respectively provided with a front positioning hole 5 or a back positioning hole, so that the parts 200 to be processed can be positioned in a pin-and-socket manner. Two front positioning holes 5 or back positioning holes on the same surface, wherein one hole is 5mm in diameter, and the other hole is 5.5mm in diameter, so that the front and back surfaces of the part to be processed 200 can be distinguished.

The front positioning holes 5 and the back positioning holes on the technical edges 6 on the two sides are arranged at intervals in the height direction, and the front and the back are also better distinguished.

In the steps S3 and S4, the margin of the single side is opened roughly for 0.3mm, and in the step S6, the margin of the single side is opened roughly for two times for 0.02 mm.

In steps S3 and S4, when the shape is roughly milled, the connecting position between the shape of the part 200 to be processed and the process bar is controlled to be at least 3 mm.

According to the milling fixture 100, the plurality of positioning round holes 2 are arranged, so that the positioning round holes 2 can be called according to different parts. According to the milling method, the milling fixture 100 is utilized, the requirement for processing the part 200 to be processed in a certain size range is met, repeated milling of the positioning circular hole 2 is avoided, and the production efficiency is improved. Meanwhile, programmers can conveniently determine the position of the positioning round hole 2, the traditional batch milling process is optimized, the labor intensity of operators is reduced, and meanwhile, the requirement on production quality is met.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.