A double-end spindle workpiece polishing device

Abstract

This utility model relates to a dual-spindle workpiece grinding device, comprising: a machine bed; a feeding mechanism disposed on the machine bed for feeding and conveying the workpiece to be ground; a workpiece rotating fixture, comprising a workpiece positioning device and a flipping mechanism, wherein the workpiece positioning device is used to clamp and fix the workpiece, and the workpiece positioning device is controlled to rotate by the flipping mechanism; a cross slide disposed between the machine bed and the workpiece rotating fixture for driving the workpiece rotating fixture to move in the X and Y axis directions; and a dual-head grinding assembly disposed on the machine bed for performing rough grinding and fine grinding on the workpiece in the workpiece rotating fixture. This utility model can perform rough grinding and fine grinding simultaneously, significantly improving grinding efficiency, reducing the transfer time of the workpiece between different processes, reducing human operation error, and ensuring the stability of grinding quality. It is particularly suitable for grinding the inner measuring surfaces of calipers and micrometers with high machining accuracy requirements.

Description

Technical Field

[0001] This utility model relates to the field of workpiece grinding technology, and in particular to a double-head spindle workpiece grinding device. Background Technology

[0002] In the manufacturing process of precision measuring tools, the machining accuracy of the inner measuring surfaces of calipers or micrometers plays a crucial role in the accuracy and reliability of the measuring tools. These inner measuring surfaces need to achieve extremely high surface finish and flatness to ensure the accuracy and repeatability of measurements. However, existing grinding processes for the inner measuring surfaces of calipers and micrometers have some limitations.

[0003] Traditional grinding processes typically employ manual operation or simple single-spindle grinding equipment. Manual grinding is not only inefficient but also struggles to guarantee consistent grinding quality, easily leading to unstable processing accuracy due to variations in operator skill. While single-spindle grinding equipment offers a degree of automation, it usually only performs one type of grinding operation (rough or fine), unable to complete continuous processing from rough to fine on the same machine. This not only increases the space required for the equipment but also necessitates workpiece transfer between different processes, increasing production costs and processing time. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the low processing efficiency and unstable grinding quality in the prior art, and to provide a double-head spindle workpiece grinding device that can perform rough grinding and fine grinding at the same time, which significantly improves grinding efficiency, reduces the transfer time of workpieces between different processes, reduces human operation error, and ensures the stability of grinding quality. It is especially suitable for grinding the inner measuring surfaces of calipers and micrometers with high processing accuracy requirements.

[0005] To solve the above-mentioned technical problems, this utility model provides a dual-head spindle workpiece grinding device, comprising:

[0006] Bed frame;

[0007] The feeding mechanism, installed on the bed, is used to feed and transport the workpiece to be polished;

[0008] A workpiece rotating fixture includes a workpiece positioning device and a flipping mechanism. The workpiece positioning device is used to clamp and fix the workpiece, and the workpiece positioning device is controlled to rotate by the flipping mechanism.

[0009] A cross slide is disposed between the bed and the workpiece rotary fixture, and is used to drive the workpiece rotary fixture to move in the X-axis and Y-axis directions;

[0010] A dual-head grinding assembly is mounted on the machine bed for rough and fine grinding of the workpiece in the workpiece rotating fixture.

[0011] In one embodiment of the present invention, the dual-head grinding assembly includes a grinding motor, a dual-head spindle, a coarse grinding wheel, a fine grinding wheel, and a grinding wheel guard. The grinding motor is mounted on the bed via a motor mounting plate. The dual-head spindle is connected to the output shaft of the grinding motor. The coarse grinding wheel and the fine grinding wheel are respectively disposed at both ends of the dual-head spindle. The grinding wheel guard is disposed on the outside of the coarse grinding wheel and the fine grinding wheel.

[0012] In one embodiment of the present invention, a cooling component is further included, which includes a cooling nozzle disposed on the grinding wheel guard and a water pump and a water supply tank disposed on the machine bed. The water pump is connected to the water supply tank and the cooling nozzle respectively through pipes.

[0013] In one embodiment of this utility model, the bed is provided with a drain box, a return water tank, a magnetic separator, and a waste box. The drain box collects the coolant after the cooling spray on the bed into the return water tank. The return water tank is connected to the inlet of the magnetic separator through a pipe. The waste box is located at the outlet of the magnetic separator for collecting the coolant after it has been processed by the magnetic separator.

[0014] In one embodiment of this utility model, the feeding mechanism includes a first X-axis linear module, a feeding tray, a first Y-axis linear module, a Z-axis linear module, and a transport gripper. The first X-axis linear module is mounted on the bed via a bracket, and the feeding tray is mounted on the first X-axis linear module and driven to move horizontally by the first X-axis linear module. The first Y-axis linear module is mounted on the bed via a bracket, the Z-axis linear module is connected to the first Y-axis linear module via an adapter plate, and the transport gripper is connected to the Z-axis linear module via a connecting plate.

[0015] In one embodiment of the present invention, the transport gripper includes a gripper cylinder, a gripper block, a balance bracket, and a balance bar. The gripper block is connected to the drive end of the gripper cylinder. The gripper cylinder is mounted on the bottom end of the connecting plate via the balance bracket. The balance bar is disposed at both ends of the balance bracket.

[0016] In one embodiment of this utility model, the cross slide includes a slide base, a second X-axis linear module, a second Y-axis linear module, and a slide plate. The second X-axis linear module is disposed on the slide base, the second Y-axis linear module is connected to the second X-axis linear module, the slide plate is disposed on the second Y-axis linear module, and the workpiece rotating fixture is disposed on the slide plate and is driven by the second X-axis linear module and the second Y-axis linear module to achieve position adjustment in the X-axis and Y-axis directions.

[0017] In one embodiment of the present invention, the skateboard is provided with a protective connecting plate.

[0018] In one embodiment of the present invention, the workpiece positioning device includes a fixture base plate, a support base, a rotating base plate, a pneumatic chuck, and a pneumatic positioning column. The support base is disposed on the fixture base plate, and the two ends of the rotating base plate are connected to the support base through rotating connectors. The pneumatic chuck and the pneumatic positioning column are both disposed on the rotating base plate.

[0019] In one embodiment of the present invention, the flipping mechanism includes a lifting cylinder, a rack, a drive gear, a positioning disk, and a rotating positioning block. The lifting cylinder is mounted on the support base, the rack is connected to the telescopic end of the lifting cylinder, the drive gear is mounted on the rotating connector via a rotating shaft, the positioning disk is mounted on the rotating connector, and the rotating positioning block is mounted on the support base and cooperates with the positioning disk to achieve rotational limiting of the workpiece positioning device.

[0020] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects:

[0021] The present invention discloses a double-head spindle workpiece grinding device, which, by setting up a feeding mechanism, a workpiece rotating clamp, a cross slide, and a double-head grinding assembly, realizes automated grinding of the inner measuring surfaces of calipers or micrometers. The device can perform rough grinding and fine grinding simultaneously, significantly improving grinding efficiency, reducing the transfer time of workpieces between different processes, reducing human operation errors, and ensuring the stability of grinding quality. It is particularly suitable for grinding the inner measuring surfaces of calipers and micrometers with high processing accuracy requirements. Attached Figure Description

[0022] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the structure of the dual-spindle workpiece grinding device in a preferred embodiment of the present invention;

[0024] Figure 2This is a schematic diagram of the structure of the dual-head grinding assembly of this utility model;

[0025] Figure 3 This is a schematic diagram of the feeding mechanism of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the handling gripper of this utility model;

[0027] Figure 5 This is a schematic diagram of the workpiece rotation fixture of this utility model;

[0028] Figure 6 This is a partial structural schematic diagram of the workpiece rotation fixture of this utility model;

[0029] Figure 7 This is a schematic diagram of the cross slide of this utility model;

[0030] Explanation of reference numerals in the accompanying drawings: 1. Bed; 2. Loading mechanism; 3. Workpiece rotating clamp; 4. Cross slide; 5. Double-head grinding assembly; 6. Cooling nozzle; 7. Water pump; 8. Water supply tank; 9. Drainage box; 10. Return water tank; 11. Magnetic separator; 12. Scrap box; 21. First X-axis linear module; 22. Feeding tray; 23. First Y-axis linear module; 24. Z-axis linear module; 25. Handling gripper; 26. Connecting plate; 31. Workpiece positioning device; 32. Tilting mechanism; 41. Slide base; 42. Second X-axis linear module; 43. Second Y-axis linear module; 44. Slide plate; 45. Protective device. 51. Connecting plate; 52. Grinding motor; 53. Double-headed spindle; 54. Coarse grinding wheel; 55. Fine grinding wheel; 26. Grinding wheel guard; 27. Gripper cylinder; 28. Grip block; 29. ​​Balance bracket; 20. Balance bar; 30. Workpiece rotating fixture; 31. Workpiece positioning device; 311. Fixture base plate; 312. Support base; 313. Rotating base plate; 314. Pneumatic chuck; 315. Pneumatic positioning column; 316. Rotating connector; 32. Tilting mechanism; 321. Lifting cylinder; 322. Rack; 323. Drive gear; 324. Positioning disc; 325. Rotating positioning block; 326. Rotating shaft. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0032] Reference Figure 1 As shown, this utility model discloses a dual-spindle workpiece grinding device, comprising:

[0033] Bed frame 1;

[0034] The feeding mechanism 2 is installed on the bed 1 and is used to feed and transport the workpiece to be polished.

[0035] The workpiece rotating fixture 3 includes a workpiece positioning device 31 and a flipping mechanism 32. The workpiece positioning device 31 is used to clamp and fix the workpiece, and the workpiece positioning device 31 is controlled to rotate by the flipping mechanism 32.

[0036] A cross slide 4 is disposed between the bed 1 and the workpiece rotating fixture 3, and is used to drive the workpiece rotating fixture 3 to move in the X-axis and Y-axis directions;

[0037] The dual-head grinding assembly 5 is mounted on the bed 1 and is used to perform rough grinding and fine grinding on the workpiece of the workpiece rotating fixture 3.

[0038] like Figure 2 As shown, the dual-head grinding assembly 5 includes a grinding motor 51, a dual-head spindle 52, a coarse grinding wheel 53, a fine grinding wheel 54, and a grinding wheel guard 55. The grinding motor 51 is mounted on the bed 1 via a motor mounting plate. The dual-head spindle 52 is connected to the output shaft of the grinding motor 51. The coarse grinding wheel 53 and the fine grinding wheel 54 are respectively located at both ends of the dual-head spindle 52. The grinding wheel guard 55 is located on the outside of the coarse grinding wheel 53 and the fine grinding wheel 54. This structural design allows the device to complete both coarse and fine grinding processes within a single assembly. By mounting grinding wheels of different grit sizes at both ends of the dual-head spindle 52, a seamless transition from coarse to fine grinding is achieved, further improving grinding efficiency and processing accuracy. Simultaneously, the design of the grinding wheel guard 55 enhances operational safety.

[0039] Furthermore, a cooling component is also included, comprising a cooling nozzle 6 mounted on the grinding wheel guard 55 and a water pump 7 and a water supply tank 8 mounted on the bed 1. The water pump 7 is connected to the water supply tank 8 and the cooling nozzle 6 via pipes. Precise spraying of the coolant effectively reduces the temperature of the workpiece and the grinding wheel, minimizing thermal deformation and extending the service life of the grinding wheel. Simultaneously, it removes debris generated during grinding, preventing scratches on the workpiece surface and thus ensuring grinding quality. This is particularly suitable for workpieces requiring extremely high surface finish, such as those used for caliper and micrometer internal measuring surfaces.

[0040] In addition, the machine bed 1 is equipped with a drain box 9, a return water tank 10, a magnetic separator 11, and a waste box 12. The drain box 9 collects the coolant sprayed from the machine bed 1 into the return water tank 10. The return water tank 10 is connected to the inlet of the magnetic separator 11 via a pipe. The waste box 12 is located at the outlet of the magnetic separator 11 to collect grinding wheel dust and iron filings, etc., after processing by the magnetic separator 11. This design not only reduces coolant waste and lowers production costs, but also removes impurities such as iron filings from the coolant through the magnetic separator 11, ensuring the cleanliness of the coolant. This further improves the stability of the grinding process and the processing quality of the workpiece, while also improving the working environment and meeting environmental protection requirements.

[0041] like Figure 3 As shown, the loading mechanism 2 includes a first X-axis linear module 21, a feeding tray 22, a first Y-axis linear module 23, a Z-axis linear module 24, and a transport gripper 25. The first X-axis linear module 21 is mounted on the bed 1 via a bracket, and the feeding tray 22 is mounted on the first X-axis linear module 21 and driven to move horizontally by the first X-axis linear module 21. The first Y-axis linear module 23 is mounted on the bed 1 via a bracket, the Z-axis linear module 24 is connected to the first Y-axis linear module 23 via an adapter plate, and the transport gripper 25 is connected to the Z-axis linear module 24 via a connecting plate 26. This structure enables automated loading and conveying of workpieces, greatly improving production efficiency, reducing manual operation, and lowering labor intensity. Simultaneously, the coordinated movement of the multi-axis modules can precisely control the position of the workpiece, improving the accuracy and stability of loading and providing a good foundation for subsequent grinding processes.

[0042] like Figure 3 and 4 As shown, the transport gripper 25 includes a gripper cylinder 251, a gripper block 252, a balance bracket 253, and a balance bar 254. The gripper block 252 is connected to the drive end of the gripper cylinder 251. The gripper cylinder 251 is mounted on the bottom end of the connecting plate 26 via the balance bracket 253. The balance bar 254 is located at both ends of the balance bracket 253. The design of the balance bracket 253 and the balance bar 254 can effectively counteract the unbalanced torque generated by the gripper block 252 during transport, ensuring the stability of the workpiece during transport and avoiding workpiece damage caused by vibration or shaking of the gripper block 252. This further improves the reliability of the loading mechanism 2 and the grinding quality.

[0043] like Figure 7As shown, the cross slide 4 includes a slide base 41, a second X-axis linear module 42, a second Y-axis linear module 43, and a slide plate 44. The second X-axis linear module 42 is mounted on the slide base 41, the second Y-axis linear module 43 is connected to the second X-axis linear module 42, the slide plate 44 is mounted on the second Y-axis linear module 43, and the workpiece rotating fixture 3 is mounted on the slide plate 44 and is driven by the second X-axis linear module 42 and the second Y-axis linear module 43 to achieve position adjustment in the X and Y axes. This structure can precisely control the position adjustment of the workpiece rotating fixture 3 in the X and Y axes, realizing multi-directional movement of the workpiece during the grinding process, improving the flexibility and machining accuracy of grinding. The design of the cross slide 4 allows the workpiece to be processed on complex grinding paths, and is particularly suitable for workpieces with complex shapes such as caliper inner measuring surfaces and micrometer inner measuring surfaces.

[0044] In this embodiment, the first X-axis linear module 21, the first Y-axis linear module 23, the Z-axis linear module 24, the second X-axis linear module 42, and the second Y-axis linear module 43 all include ball screws and motors. The motor drives the ball screw to rotate through a coupling. The rotation of the ball screw drives the slider to move linearly along the guide rail through the nut. This is the prior art.

[0045] Furthermore, the slide plate 44 is provided with a protective connecting plate 45. The protective connecting plate 45 is used to prevent foreign objects from entering the guide rail and the lead screw structure and interfering with the movement of the cross slide table 4, thus extending the service life of the equipment. It also ensures the continuity and stability of the grinding process, further improving processing efficiency and quality.

[0046] like Figure 5 As shown, the workpiece positioning device 31 includes a fixture base plate 311, a support base 312, a rotating base plate 313, a pneumatic chuck 314, and a pneumatic positioning column 315. The support base 312 is mounted on the fixture base plate 311. The two ends of the rotating base plate 313 are connected to the support base 312 via rotating connectors 316. The pneumatic chuck 314 and the pneumatic positioning column 315 are both mounted on the rotating base plate 313. This structure enables high-precision clamping and positioning of the workpiece. The design of the pneumatic chuck 314 and the pneumatic positioning column 315 provides stable clamping force, ensuring the stability of the workpiece during the grinding process. Simultaneously, the design of the rotating base plate 313 allows the workpiece to rotate during grinding, meeting the needs of multi-angle grinding of caliper and micrometer inner measuring surfaces, and improving processing flexibility and accuracy.

[0047] In this embodiment, the pneumatic chuck 314 includes a rotary lifting cylinder and a chuck. The telescopic end of the rotary lifting cylinder controls the rotation and descent of the chuck to clamp the workpiece. The pneumatic positioning column 315 includes a rotary lifting cylinder, a push plate, and a positioning column. The telescopic end of the rotary lifting cylinder is connected to the positioning column through the push plate. The positioning column is inserted into a strip hole on the rotating base plate 313.

[0048] like Figure 6 As shown, the flipping mechanism 32 includes a lifting cylinder 321, a rack 322, a drive gear 323, a positioning disk 324, and a rotating positioning block 325. The lifting cylinder 321 is mounted on the support base 312. The rack 322 is connected to the telescopic end of the lifting cylinder 321. The drive gear 323 is mounted on the rotating connector 316 via a rotating shaft 326. The positioning disk 324 is mounted on the rotating connector 316. The rotating positioning block 325 is mounted on the support base 312 and cooperates with the positioning disk 324 to achieve the rotational limitation of the workpiece positioning device 31.

[0049] When the workpiece needs to be rotated to a specific angle, the lifting cylinder 321 activates, driving the rack 322 to move linearly, which in turn drives the drive gear 323 to rotate. The rotation of the drive gear 323 drives the rotating base plate 313, rotating the workpiece to the predetermined position. At this time, the rotating positioning block 325 engages with the limiting groove on the positioning disk 324 to lock the position of the rotating base plate 313, ensuring the workpiece remains stable during grinding. This design ensures the angular accuracy and stability of the workpiece during rotation, avoiding processing quality problems caused by rotation errors. The cooperation between the rotating positioning block 325 and the positioning disk 324 effectively limits the rotation range of the workpiece, ensuring the safety and reliability of the grinding process, and further improving the processing accuracy and adaptability of the device.

[0050] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A dual head spindle workpiece polishing apparatus, characterized by: include: Bed frame; The feeding mechanism, installed on the bed, is used to feed and transport the workpiece to be polished; A workpiece rotating fixture includes a workpiece positioning device and a flipping mechanism. The workpiece positioning device is used to clamp and fix the workpiece, and the workpiece positioning device is controlled to rotate by the flipping mechanism. A cross slide is disposed between the bed and the workpiece rotary fixture, and is used to drive the workpiece rotary fixture to move in the X-axis and Y-axis directions; A dual-head grinding assembly is mounted on the machine bed for rough and fine grinding of the workpiece in the workpiece rotating fixture.

2. The double-end spindle workpiece polishing apparatus of claim 1, wherein: The dual-head grinding assembly includes a grinding motor, a dual-head spindle, a coarse grinding wheel, a fine grinding wheel, and a grinding wheel guard. The grinding motor is mounted on the machine bed via a motor mounting plate. The dual-head spindle is connected to the output shaft of the grinding motor. The coarse grinding wheel and the fine grinding wheel are respectively located at both ends of the dual-head spindle. The grinding wheel guard is located on the outside of the coarse grinding wheel and the fine grinding wheel.

3. The dual-spindle workpiece grinding device according to claim 2, characterized in that: It also includes a cooling component, which includes a cooling nozzle mounted on the grinding wheel guard and a water pump and a water supply tank mounted on the machine bed. The water pump is connected to the water supply tank and the cooling nozzle respectively via pipes.

4. The double-end spindle workpiece polishing apparatus of claim 3, wherein: The bed is equipped with a drain box, a return water tank, a magnetic separator, and a waste box. The drain box collects the coolant after the cooling spray on the bed into the return water tank. The return water tank is connected to the inlet of the magnetic separator through a pipe. The waste box is located at the outlet of the magnetic separator to collect the coolant after it has been processed by the magnetic separator.

5. The double-end spindle workpiece polishing apparatus of claim 1, wherein: The feeding mechanism includes a first X-axis linear module, a feeding tray, a first Y-axis linear module, a Z-axis linear module, and a transport gripper. The first X-axis linear module is mounted on the bed via a bracket, and the feeding tray is mounted on the first X-axis linear module. The first Y-axis linear module is mounted on the bed via a bracket, the Z-axis linear module is connected to the first Y-axis linear module via an adapter plate, and the transport gripper is connected to the Z-axis linear module via a connecting plate.

6. The double-end spindle workpiece polishing apparatus of claim 5, wherein: The transport gripper includes a gripper cylinder, a gripper block, a balance bracket, and a balance bar. The gripper block is connected to the drive end of the gripper cylinder. The gripper cylinder is mounted on the bottom end of the connecting plate via the balance bracket. The balance bar is located at both ends of the balance bracket.

7. The double-end spindle workpiece polishing apparatus of claim 1, wherein: The cross slide includes a slide base, a second X-axis linear module, a second Y-axis linear module, and a slide plate. The second X-axis linear module is mounted on the slide base, the second Y-axis linear module is connected to the second X-axis linear module, the slide plate is mounted on the second Y-axis linear module, and the workpiece rotating fixture is mounted on the slide plate and is driven by the second X-axis linear module and the second Y-axis linear module to achieve position adjustment in the X-axis and Y-axis directions.

8. The double-end spindle workpiece polishing apparatus of claim 7, wherein: The skateboard is equipped with a protective connecting plate.

9. The double-end spindle workpiece polishing apparatus of claim 1, wherein: The workpiece positioning device includes a fixture base plate, a support base, a rotating base plate, a pneumatic chuck, and a pneumatic positioning column. The support base is disposed on the fixture base plate, and the two ends of the rotating base plate are connected to the support base through rotating connectors. The pneumatic chuck and the pneumatic positioning column are both disposed on the rotating base plate.

10. The double-end spindle workpiece polishing apparatus of claim 9, wherein: The flipping mechanism includes a lifting cylinder, a rack, a drive gear, a positioning disk, and a rotating positioning block. The lifting cylinder is mounted on the support base. The rack is connected to the telescopic end of the lifting cylinder. The drive gear is mounted on the rotating connector via a rotating shaft. The positioning disk is mounted on the rotating connector. The rotating positioning block is mounted on the support base and cooperates with the positioning disk to achieve rotational limiting of the workpiece positioning device.

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