1. A main shaft rigidity detection device comprises a main shaft (1), a detection part (5), a force application part (6) and a controller (7), and is characterized in that: the fixed ring flange (2) that has cup jointed in main shaft (1) surface right part, ring flange (2) right-hand member is provided with hole (3) that link up about eight, eight hole (3) are the annular array and distribute, main shaft (1) right-hand member middle part is provided with axle core (10), axle core (10) right-hand member middle part is provided with oral area (4), it is right-hand just to be located main shaft (1) detection part (5) force application part (6), controller (7) and detection part (5) electric connection, controller (7) front end middle part is provided with display screen (8), controller (7) front end lower part is provided with control button (9).

2. A spindle rigidity detecting apparatus according to claim 1, wherein: detection portion (5) include loading board (21), loading board (21) right-hand member fixed mounting has pressure sensor (22), pressure sensor (22) right-hand member fixed mounting has screw thread hollow tube (23), pressure sensor (22) right-hand member fixed mounting has accurate displacement sensor (24), accurate displacement sensor (24) are located inside screw thread hollow tube (23), screw thread hollow tube (23) surface threaded connection has protection screw (25), pressure sensor (22) and accurate displacement sensor (24) all with controller (7) electric connection.

3. A spindle rigidity detecting apparatus according to claim 2, wherein: the bearing plate (21) comprises a deep part (31), the deep part (31) is of a round table-shaped structure with a narrow left side and a wide right side, the diameter of the right end face of the deep part (31) is smaller than that of the opening part (4), a pressing part (32) is fixedly mounted at the right end of the deep part (31), and the diameter of the pressing part (32) is larger than that of the shaft core (10).

4. A spindle rigidity detecting apparatus according to claim 1, wherein: force application part (6) are including connecting plate (41), connecting plate (41) left end fixed mounting has eight spliced poles (42), eight spliced pole (42) are located eight holes (3) right-hand respectively, spliced pole (42) left end fixed mounting has screw thread post (43), screw thread post (43) surface screw thread interlude is connected with nut (44), connecting plate (41) right-hand member middle part alternates fixedly connected with fixing base (45), fixing base (45) left end face runs through the left end face of connecting plate (41) and extends to the right-hand of connecting plate (41), fixing base (45) left end screw thread interlude swing joint has force application lead screw (46), force application lead screw (46) left end is provided with application of force head (47), force application lead screw (46) right part is provided with hand wheel (48).

5. The spindle rigidity detecting device according to claim 4, wherein: the diameter of the connecting column (42) is larger than that of the hole (3), and the diameter of the threaded column (43) is smaller than that of the hole (3).

6. The spindle rigidity detecting device according to claim 4, wherein: the right end of the force application head (47) is fixedly provided with a threaded rod (51), the left end of the force application screw rod (46) is provided with a threaded hole (71), the threaded hole (71) is matched with the threaded rod (51), and the right end of the force application screw rod (46) is fixedly provided with an octagonal rod (52).

7. The spindle rigidity detecting device according to claim 4, wherein: the hand wheel (48) right-hand member is opened has perforation (61) that link up about, hand wheel (48) right-hand member is provided with locking cap (62), threaded connection has set screw (63) between locking cap (62) and hand wheel (48).

8. The spindle rigidity detecting device according to claim 7, wherein: the left end of the fixing cap (62) is provided with an octagonal hole (81), and the octagonal hole (81) is matched with the octagonal rod (52).

9. The spindle rigidity detecting device according to claim 4, wherein: the diameter of the left end face of the force application head (47) is larger than that of the right end face of the protection screw (25).

10. The use method of the spindle rigidity detecting device according to claims 1-9, comprising the steps of:

the detection part is installed: the precise displacement sensor is arranged in the threaded hollow pipe, the controller is used for simultaneously connecting the pressure sensor and the precise displacement sensor, so that the controller can simultaneously detect input signals of the pressure sensor and the precise displacement sensor, the pressure sensor is arranged on the right end face of the pressing part of the bearing plate, and a protection screw is specially locked at the tail part of the threaded hollow pipe to avoid the damage to the sensing surface of the pressure sensor due to overlarge pressure, so that the detection part is formed;

(II) installing a force application part: locking a fixed seat on a connecting plate, fixing a fixing cap on a hand wheel through a fixing screw, enabling a through hole in the hand wheel to penetrate through an octagonal rod, placing the octagonal rod in an octagonal hole, completing connection of the hand wheel and a force application screw rod, screwing the force application screw rod into the fixed seat through rotating the hand wheel, connecting a force application head with a threaded hole in the left end face of the force application screw rod through the threaded rod, finally enabling a threaded column to penetrate through the through hole, fixing the threaded rod on a flange plate through a nut, and connecting a main shaft and the connecting plate together, wherein the part is a force application part;

(III) detection process: the deep part of the bearing plate in the detection part is placed at the opening part of the main shaft, a hand wheel is slowly rotated to drive a force application screw rod to extrude a protection screw locked on a pressure sensor leftwards, a pressing part on the bearing plate synchronously extrudes a shaft core, the shaft core can generate corresponding reaction force, meanwhile, the shaft core can generate a section of displacement leftwards, the pressure sensor can detect the reaction force, meanwhile, a precise displacement sensor measures the leftward displacement of the shaft core, and a signal is input into a controller;

(IV) detection results: a calculation scheme is preset on the controller, and during measurement, the controller receives input signals of the pressure sensor and the precision displacement sensor, calculates a result through the preset calculation scheme, and displays the result on the display screen in real time.

Background

The main shaft is a shaft that receives power from an engine or a motor and transmits it to other members. In order to ensure the use accuracy of the fine cutting spindle of the machining center, the axial rigidity of the spindle is generally tested. The existing spindle rigidity detection scheme can only estimate the installation pretightening force of a single bearing through the installation matching amount of the single bearing in the spindle installation process, and then obtains the 'calculated axial rigidity' of the whole spindle through a related calculation scheme, wherein the large error exists, the operation is complex, the variable is more, the measurement consistency is poor, and the measurement is difficult to be used as an independent judgment basis. Therefore, a spindle rigidity detection device and a use method thereof are provided.

Disclosure of Invention

The invention mainly aims to provide a spindle rigidity detection device and a use method thereof, which can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a main shaft rigidity detection device, includes main shaft, testing section, application of force part and controller, the fixed flange dish that has cup jointed in main shaft surface right part, the flange dish right-hand member is provided with eight holes that link up about, eight the hole is the annular array and distributes, main shaft right-hand member middle part is provided with the axle core, axle core right-hand member middle part is provided with the oral area, testing section is located the main shaft right-hand, application of force part is located testing section right-hand, controller and testing section electric connection, controller front end middle part is provided with the display screen, controller front end lower part is provided with control button.

Preferably, the detection part comprises a bearing plate, a pressure sensor is fixedly mounted at the right end of the bearing plate, a threaded hollow pipe is fixedly mounted at the right end of the pressure sensor, a precise displacement sensor is fixedly mounted at the right end of the pressure sensor, the precise displacement sensor is located inside the threaded hollow pipe, a protection screw is connected to the outer surface of the threaded hollow pipe in a threaded manner, and the pressure sensor and the precise displacement sensor are both electrically connected with the controller.

Preferably, the bearing plate includes deep portion, deep portion is the round platform shape structure of narrow right side width in a left side, deep portion right-hand member terminal surface diameter is less than the oral area diameter, deep portion right-hand member fixed mounting has presses the splenium, it is greater than the axle core diameter to press the splenium diameter.

Preferably, the force application part includes the connecting plate, connecting plate left end fixed mounting has eight spliced poles, eight the spliced pole is located just right-hand in eight holes respectively, spliced pole left end fixed mounting has the screw thread post, screw thread post surface screw thread interlude is connected with the nut, connecting plate right-hand member middle part interlude fixedly connected with fixing base, fixing base left end face runs through the left end face of connecting plate and extends to the right-hand of connecting plate, fixing base left end screw thread interlude swing joint has the force application lead screw, force application lead screw left end is provided with the application of force head, force application lead screw right part is provided with the hand wheel.

Preferably, the diameter of the connecting column is larger than that of the hole, and the diameter of the threaded column is smaller than that of the hole.

Preferably, the right end of the force application head is fixedly provided with a threaded rod, the left end of the force application screw rod is provided with a threaded hole, the threaded hole is matched with the threaded rod, and the right end of the force application screw rod is fixedly provided with an octagonal rod.

Preferably, the right end of the hand wheel is provided with a through hole which is communicated left and right, the right end of the hand wheel is provided with a fixing cap, and a fixing screw is connected between the fixing cap and the hand wheel through threads.

Preferably, the left end of the fixing cap is provided with an octagonal hole, and the octagonal hole is matched with the octagonal rod.

Preferably, the diameter of the left end face of the force application head is larger than that of the right end face of the protection screw.

A use method of a spindle rigidity detection device comprises the following steps:

the detection part is installed: the precise displacement sensor is arranged in the threaded hollow pipe, the controller is used for simultaneously connecting the pressure sensor and the precise displacement sensor, so that the controller can simultaneously detect input signals of the pressure sensor and the precise displacement sensor, the pressure sensor is arranged on the right end face of the pressing part of the bearing plate, and a protection screw is specially locked at the tail part of the threaded hollow pipe to avoid the damage to the sensing surface of the pressure sensor due to overlarge pressure, so that the detection part is formed;

(II) installing a force application part: locking a fixed seat on a connecting plate, fixing a fixing cap on a hand wheel through a fixing screw, enabling a through hole in the hand wheel to penetrate through an octagonal rod, placing the octagonal rod in an octagonal hole, completing connection of the hand wheel and a force application screw rod, screwing the force application screw rod into the fixed seat through rotating the hand wheel, connecting a force application head with a threaded hole in the left end face of the force application screw rod through the threaded rod, finally enabling a threaded column to penetrate through the through hole, fixing the threaded rod on a flange plate through a nut, and connecting a main shaft and the connecting plate together, wherein the part is a force application part;

(III) detection process: the deep part of the bearing plate in the detection part is placed at the opening part of the main shaft, a hand wheel is slowly rotated to drive a force application screw rod to extrude a protection screw locked on a pressure sensor leftwards, a pressing part on the bearing plate synchronously extrudes a shaft core, the shaft core can generate corresponding reaction force, meanwhile, the shaft core can generate a section of displacement leftwards, the pressure sensor can detect the reaction force, meanwhile, a precise displacement sensor measures the leftward displacement of the shaft core, and a signal is input into a controller;

(IV) detection results: a calculation scheme is preset on the controller, and during measurement, the controller receives input signals of the pressure sensor and the precision displacement sensor, calculates a result through the preset calculation scheme, and displays the result on the display screen in real time.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the magnitude of the resilience force after the shaft core is pressed inwards for a certain displacement is measured by the pressure sensor with accurate measuring distance, meanwhile, the inward displacement of the shaft core of the spindle is detected by the accurate displacement sensor, and then the specific numerical value of the axial rigidity of the spindle in a certain interval is displayed in real time through a calculation scheme arranged in the controller, namely, the magnitude of the axial rigidity of the spindle after assembly and running-in is directly measured.

2. According to the invention, through a preset calculation scheme in the controller, the controller electrically connected with the pressure sensor can directly substitute parameters, and the measurement result is synchronously displayed when the rigidity is measured, so that the purpose of real-time display is achieved.

3. According to the invention, the force application screw rod is specially provided with the precise thread indexing teeth, so that the spring back can be prevented when the force application screw rod is slowly pressed in, the measurement process is easier to operate, and the detection precision can be effectively improved.

4. According to the invention, the bearing plate belongs to an adaptive part, can be replaced according to different diameters of the spindle shaft core opening, is simple in replacement step and has universality.

Drawings

FIG. 1 is an overall view of a spindle rigidity detecting apparatus according to the present invention;

FIG. 2 is a schematic diagram illustrating a partial structural detection effect of a spindle rigidity detection apparatus according to the present invention;

FIG. 3 is a schematic view of the overall structure of a spindle of the spindle rigidity detecting apparatus according to the present invention;

fig. 4 is an exploded view of the overall structure of a detecting part of a spindle rigidity detecting apparatus according to the present invention;

FIG. 5 is a schematic view of the overall structure of the detecting portion of the spindle rigidity detecting apparatus according to the present invention;

FIG. 6 is a schematic view of the overall structure of a force application part of the spindle rigidity detecting apparatus according to the present invention;

FIG. 7 is an exploded view of a part of the structure of a detecting portion of a spindle rigidity detecting apparatus according to the present invention;

FIG. 8 is a schematic view of the overall structure of a connecting plate of the spindle rigidity detecting apparatus according to the present invention;

FIG. 9 is a schematic view of the overall structure of a force application screw of the spindle rigidity detecting apparatus according to the present invention;

FIG. 10 is a schematic view of the overall structure of a fixing cap of the spindle rigidity detecting apparatus according to the present invention;

fig. 11 is a schematic diagram of the overall structure of a controller of a spindle rigidity detecting apparatus according to the present invention.

In the figure: 1. a main shaft; 2. a flange plate; 3. a hole; 4. a mouth; 5. a detection section; 6. a force application portion; 7. a controller; 8. a display screen; 9. a control button; 10. a shaft core; 21. a carrier plate; 22. a pressure sensor; 23. a threaded hollow tube; 24. a precision displacement sensor; 25. protecting the screw; 31. a deep portion; 32. a pressing part; 41. a connecting plate; 42. connecting columns; 43. a threaded post; 44. a nut; 45. a fixed seat; 46. a force application screw rod; 47. a force application head; 48. a hand wheel; 51. a threaded rod; 52. an octagonal rod; 61. perforating; 62. a fixing cap; 63. fixing screws; 71. a threaded hole; 81. eight arris holes.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; 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.

As shown in fig. 1-11, a spindle rigidity detection device, including spindle 1, detection part 5, force application part 6 and controller 7, the fixed flange 2 that has cup jointed in spindle 1 surface right side portion, flange 2 right-hand member is provided with eight holes 3 that link up about, eight holes 3 are the annular array and distribute, spindle 1 right-hand member middle part is provided with axle core 10, axle core 10 right-hand member middle part is provided with oral area 4, detection part 5 is located spindle 1 right-hand, force application part 6 is located detection part 5 right-hand member, controller 7 and detection part 5 electric connection, controller 7 front end middle part is provided with display screen 8, controller 7 front end lower part is provided with control button 9.

Detection portion 5 includes loading board 21, loading board 21 right-hand member fixed mounting has pressure sensor 22, pressure sensor 22 right-hand member fixed mounting has screw thread hollow tube 23, pressure sensor 22 right-hand member fixed mounting has accurate displacement sensor 24, accurate displacement sensor 24 is located inside screw thread hollow tube 23, screw thread hollow tube 23 surface threaded connection has protecting screw 25, pressure sensor 22 and accurate displacement sensor 24 all with 7 electric connection of controller, pressure sensor 22 and accurate displacement sensor 24 are prior art, protecting screw 25 right-hand member face is the high rigidity material, screw thread hollow tube 23's length is greater than accurate displacement sensor 24's length.

The bearing plate 21 comprises a deep part 31, the deep part 31 is of a truncated cone structure with a narrow left end and a wide right end, the diameter of the right end face of the deep part 31 is smaller than that of the opening part 4, a pressing part 32 is fixedly mounted at the right end of the deep part 31, the diameter of the pressing part 32 is larger than that of the shaft core 10, and the right end face of the pressing part 32 and the left end face of the pressure sensor 22 can be detached.

Force application part 6 includes connecting plate 41, connecting plate 41 left end fixed mounting has eight spliced poles 42, eight spliced poles 42 are located just right-hand in eight holes 3 respectively, spliced pole 42 left end fixed mounting has screw thread post 43, screw thread post 43 surface screw thread interlude is connected with nut 44, connecting plate 41 right-hand member middle part interlude fixedly connected with fixing base 45, 45 left end face of fixing base runs through the left end face of connecting plate 41 and extends to connecting plate 41 right-hand, 45 left end screw thread interlude swing joint of fixing base 45 has force application lead screw 46, force application lead screw 46 left end is provided with application of force head 47, force application lead screw 46 right part is provided with hand wheel 48, the special accurate screw thread graduation tooth on the force application lead screw 46.

The diameter of the connecting column 42 is larger than that of the hole 3, the diameter of the threaded column 43 is smaller than that of the hole 3, and when the force application part 6 is installed, the left end face of the connecting column 42 is in contact with the right end face of the flange 2.

The right end of the force application head 47 is fixedly provided with a threaded rod 51, the left end of the force application screw rod 46 is provided with a threaded hole 71, the threaded hole 71 is matched with the threaded rod 51, the right end of the force application screw rod 46 is fixedly provided with an eight-edge rod 52, and the eight-edge rod 52 is matched with the fixing cap 62 to drive the force application screw rod 46 to rotate when the hand wheel 48 rotates.

The right end of the hand wheel 48 is provided with a through hole 61 which is through from left to right, the right end of the hand wheel 48 is provided with a fixing cap 62, a fixing screw 63 is connected between the fixing cap 62 and the hand wheel 48 through a thread, and the fixing cap 62 is matched with the force application screw rod 46.

The left end of the fixing cap 62 is provided with an octagonal hole 81, and the octagonal hole 81 is matched with the octagonal rod 52.

The diameter of the left end face of the force application head 47 is larger than that of the right end face of the protection screw 25, and the left end face of the force application head 47 is made of high-hardness materials.

In the invention, the magnitude of the resilience force is measured after the shaft core 10 is pressed inwards for a certain displacement through the pressure sensor 22 with accurate measuring range, meanwhile, the inward displacement of the shaft core 10 of the spindle 1 is detected through the precision displacement sensor 24, then, the specific value of the axial rigidity of the spindle 1 in a certain interval is displayed in real time through the calculation scheme arranged in the controller 7, namely, the axial rigidity of the spindle 1 after assembly and running-in are directly measured, the controller 7 electrically connected with the pressure sensor 22 can be directly substituted into parameters through the preset calculation scheme in the controller 7, the measurement result is synchronously displayed when the rigidity is measured, the purpose of real-time display is achieved, the resilience can be prevented when the spindle is slowly pressed through the special precision thread indexing teeth on the force application screw rod 46, the measurement process is easier to operate, and the detection precision can be effectively improved, the bearing plate 21 belongs to an adaptive part, can be replaced according to the diameter difference of the opening part 4 of the shaft core 10 of the main shaft 1, has simple replacing steps and universality.

A use method of a spindle rigidity detection device comprises the following steps:

the detection part is installed: the precise displacement sensor is arranged in the threaded hollow pipe, the controller is used for simultaneously connecting the pressure sensor and the precise displacement sensor, so that the controller can simultaneously detect input signals of the pressure sensor and the precise displacement sensor, the pressure sensor is arranged on the right end face of the pressing part of the bearing plate, and a protection screw is specially locked at the tail part of the threaded hollow pipe to avoid the damage to the sensing surface of the pressure sensor due to overlarge pressure, so that the detection part is formed;

(II) installing a force application part: locking a fixed seat on a connecting plate, fixing a fixing cap on a hand wheel through a fixing screw, enabling a through hole in the hand wheel to penetrate through an octagonal rod, placing the octagonal rod in an octagonal hole, completing connection of the hand wheel and a force application screw rod, screwing the force application screw rod into the fixed seat through rotating the hand wheel, connecting a force application head with a threaded hole in the left end face of the force application screw rod through the threaded rod, finally enabling a threaded column to penetrate through the through hole, fixing the threaded rod on a flange plate through a nut, and connecting a main shaft and the connecting plate together, wherein the part is a force application part;

(III) detection process: the deep part of the bearing plate in the detection part is placed at the opening part of the main shaft, a hand wheel is slowly rotated to drive a force application screw rod to extrude a protection screw locked on a pressure sensor leftwards, a pressing part on the bearing plate synchronously extrudes a shaft core, the shaft core can generate corresponding reaction force, meanwhile, the shaft core can generate a section of displacement leftwards, the pressure sensor can detect the reaction force, meanwhile, a precise displacement sensor measures the leftward displacement of the shaft core, and a signal is input into a controller;

(IV) detection results: a calculation scheme is preset on the controller, and during measurement, the controller receives input signals of the pressure sensor and the precision displacement sensor, calculates a result through the preset calculation scheme, and displays the result on the display screen in real time.

According to the invention, the axial rigidity of the main shaft after assembly and running-in can be directly measured by the pressure sensor and the precise displacement sensor in combination with the controller, and the measurement result is synchronously displayed when the rigidity is measured by a preset calculation scheme in the controller, so that the device is simple to operate, high in precision and strong in universality.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.