Numerical control inner and outer circle compound grinding machine

Abstract

The application relates to a numerical control inner-outer circle compound grinding machine, which comprises a rack and an outer circle grinding mechanism, wherein the outer circle grinding mechanism comprises an outer circle grinding spindle box and a grinding disc, the outer circle grinding spindle box moves on the rack, the grinding disc rotates on the outer circle grinding spindle box, the numerical control inner-outer circle compound grinding machine further comprises an inner circle grinding mechanism, the inner circle grinding mechanism comprises two inner circle grinding heads, two inner circle grinding spindle boxes and a driving structure, the two inner circle grinding spindle boxes respectively slide on the rack, the opposite sides of the two inner circle grinding spindle boxes are respectively provided with abutting seats, the two inner circle grinding spindle boxes are respectively provided with sliding seats which slide in the two inner circle grinding spindle boxes, the two sliding seats are respectively provided with rotating shafts, the two inner circle grinding heads are coaxially arranged at the opposite ends of the two rotating shafts, and the driving structure is used for driving the sliding of the sliding seats and the rotation of the rotating shafts around the shaft axes of the rotating shafts. Through the increase of the inner circle grinding mechanism, the device simultaneously has the outer circle grinding and inner circle grinding functions, the workpiece does not need to be transferred between different devices, the machining efficiency is greatly improved, and the inner wall and the outer wall of the cylindrical part can be simultaneously ground.

Description

Technical Field

[0001] This invention relates to the field of CNC grinding machines, and in particular to a CNC internal and external cylindrical composite grinding machine. Background Technology

[0002] A grinding machine is a machine tool that uses grinding wheels to grind the surface of a workpiece. Most grinding machines use high-speed rotating grinding wheels for grinding, and CNC cylindrical grinding technology has developed rapidly to achieve high workpiece dimensional accuracy and surface quality. With the improvement of machining levels, grinding machines occupy an increasingly larger proportion of machine tools, and CNC grinding machines play an irreplaceable role in the modern grinding process.

[0003] Reference Figure 1 For cylindrical parts, both the inner and outer walls need to be ground. Most existing grinding machines can only grind the inner or outer wall of the product, and cannot grind both the inner and outer walls at the same time. Usually, two grinding machines are used to clamp the parts in stages, which can easily lead to large coaxiality tolerances between the inner and outer walls of the product. Summary of the Invention

[0004] To facilitate the simultaneous grinding of the inner and outer walls of cylindrical parts, this application provides a CNC internal and external cylindrical composite grinding machine.

[0005] The CNC internal and external cylindrical composite grinding machine provided in this application adopts the following technical solution:

[0006] A CNC internal and external cylindrical compound grinding machine includes a frame and an external cylindrical grinding mechanism. The external cylindrical grinding mechanism includes an external cylindrical grinding spindle box and a grinding disc. The external cylindrical grinding spindle box is movably connected to the frame, and the grinding disc is rotatably connected to the external cylindrical grinding spindle box. The machine also includes an internal cylindrical grinding mechanism, which includes two internal cylindrical grinding heads, two internal cylindrical grinding spindle boxes, and a drive structure. The two internal cylindrical grinding spindle boxes are slidably connected to the frame. Clamping mechanisms are rotatably connected to opposite sides of the two internal cylindrical grinding spindle boxes. Sliding seats are slidably connected inside the two internal cylindrical grinding spindle boxes, and rotating shafts are rotatably connected to the two sliding seats. The two internal cylindrical grinding heads are coaxially mounted at opposite ends of the two rotating shafts. The drive structure is used to drive the sliding seats to slide and to drive the rotating shafts to rotate around their own axes.

[0007] By adopting the above technical solution and adding an internal grinding mechanism, the equipment can simultaneously perform external and internal grinding functions, eliminating the need to transfer workpieces between different devices and greatly improving processing efficiency. The two internal grinding heads can simultaneously perform internal grinding from both ends of the workpiece, ensuring processing symmetry and accuracy. Furthermore, the internal grinding spindle box is slidably connected to the frame, which can adapt to the processing requirements of workpieces of different lengths and facilitates the simultaneous grinding of the inner and outer walls of cylindrical parts.

[0008] Preferably, the clamping mechanism includes a hollow turntable, a plurality of end face abutment blocks, a plurality of outer wall clamping blocks, an adjusting component, and a driving component. The hollow turntable is rotatably connected to the spindle box of the internal grinding mill. The plurality of end face abutment blocks are slidably connected to the hollow turntable along a direction perpendicular to the axis of the hollow turntable. The adjusting component is used to adjust the spacing between the plurality of end face abutment blocks. The plurality of outer wall clamping blocks are slidably connected to the plurality of end face abutment blocks along the axis of the hollow turntable. The driving component is used to drive the movement of the plurality of outer wall clamping blocks respectively. When an outer wall clamping block rotates to the side facing the grinding mill, the driving component drives the outer wall clamping block to move away from the grinding mill.

[0009] By adopting the above technical solution, the end face abutment block can be positioned from the end face of the workpiece, the outer wall clamping block can clamp the outer circumference of the workpiece, realize the stable fixation of the workpiece, and prevent the workpiece from shaking during processing and affecting the accuracy; the adjusting component can adjust the spacing of the end face abutment blocks to adapt to workpieces of different sizes; the driving component can control the movement of the outer wall clamping block, and when the outer wall clamping block rotates to the side facing the grinding disc, it automatically moves away, reducing the possibility of interference with the external cylindrical grinding mechanism.

[0010] Preferably, the driving component includes an abutment seat, a translation seat, a first return spring, multiple second return springs, and a guide block. The translation seat is slidably connected to the inner grinding mill spindle box. The abutment seat is slidably connected to the translation seat along a sliding direction perpendicular to the translation seat. The first return spring is installed on the abutment seat and always drives the abutment seat to slide away from the inner grinding mill spindle box. The multiple second return springs correspond to multiple outer wall clamps and are respectively disposed on the corresponding outer wall clamps. The multiple second return springs always drive the corresponding outer wall clamps to slide away from the inner grinding mill spindle box. Guide grooves are respectively opened on the outer peripheral surfaces of the multiple outer wall clamps. The openings on both sides of the guide grooves are gradually widened. The guide block is disposed on the abutment seat and can be slidably connected to the guide groove along the inner wall of the guide groove. A sliding groove is provided on a plurality of end face abutment blocks. A slider is provided on the translation seat. The slider is always slidably connected to the sliding groove of any end face block.

[0011] By adopting the above technical solution, the automatic adjustment of the outer wall clamping block is achieved through the cooperation of the abutment seat, the return spring and the guide block; the first return spring and the second return spring ensure the clamping force of the outer wall clamping block in a non-interference state; the gradually expanding design of the guide groove enables the guide block to smoothly drive the outer wall clamping block to move when sliding; the structure is simple and highly reliable, reducing the probability of equipment failure.

[0012] Preferably, the adjusting component includes an end-face threaded disc, a bevel gear ring, and a bevel gear. A plurality of the end-face abutment blocks are simultaneously threaded onto the end-face threaded disc. The end-face threaded disc is coaxially and rotatably connected to a hollow turntable. The bevel gear is coaxially and fixedly connected to the end-face threaded disc. The bevel gear is rotatably connected to the hollow turntable and meshes with the bevel gear disc.

[0013] By adopting the above technical solution, the synchronous adjustment of multiple end face contact blocks is achieved through the cooperation of end face threaded disc, bevel gear ring and bevel gear, ensuring the consistency of adjustment. This structure provides precise adjustment and convenient operation.

[0014] Preferably, it also includes a discharge assembly, which includes a scraper and a guide plate. The internal grinding spindle box has a discharge port. The guide plate is fixedly connected to the discharge port. The guide plate is provided with a scraper block. A hollow rod is fixedly connected to the sliding seat. The hollow rod is coaxial and sleeved on the outside of the rotating shaft. The hollow rod passes through and is movably connected to the scraper block. The scraper is fixedly connected to the hollow rod and passes through the scraper block together with the hollow rod. The scraper block always abuts against the upper and lower surfaces of the scraper.

[0015] By adopting the above technical solution, adding a discharge component, the scraper and guide plate can be used to clean up the debris generated during processing in a timely manner, preventing debris accumulation from affecting processing accuracy or damaging the equipment, and maintaining a clean working environment for the equipment.

[0016] Preferably, the scraper has a coolant flow channel, the outlet end of the coolant flow channel faces the inner grinding head, and the X-moving seat is provided with a coolant inlet end, which is connected to a coolant source through a pipe.

[0017] By adopting the above technical solution, a coolant flow channel is set on the scraper, so that the coolant can flow directly to the inner grinding head and the processing area, which plays a role in cooling and lubrication, reducing the wear of the grinding head and extending its service life. At the same time, the coolant can carry away some debris, enhance the cleaning effect, and further ensure the processing quality.

[0018] Preferably, a scraper strip is provided on one side of the scraper in the width direction, and the scraper strip can abut against the inner wall of the workpiece.

[0019] By adopting the above technical solution, the scraper blade can abut against the inner wall of the workpiece, and can clean the debris on the inner wall during the workpiece rotation process, avoiding debris residue from affecting the inner circle machining accuracy.

[0020] The main technical effects of this invention are reflected in the following aspects:

[0021] 1. By adding an internal grinding mechanism, this invention enables the equipment to perform both external and internal grinding functions simultaneously, eliminating the need to transfer workpieces between different machines and significantly improving processing efficiency. The two internal grinding heads allow for simultaneous internal grinding from both ends of the workpiece, ensuring processing symmetry and precision. Furthermore, the internal grinding spindle box is slidably connected to the frame, adapting to the processing requirements of workpieces of different lengths and facilitating simultaneous grinding of the inner and outer walls of cylindrical parts.

[0022] 2. The end face abutment block of the present invention can be positioned from the end face of the workpiece, and the outer wall clamping block can clamp the outer peripheral surface of the workpiece to achieve stable fixation of the workpiece and prevent the workpiece from shaking during processing and affecting accuracy; the adjusting component can adjust the spacing of the end face abutment blocks to adapt to workpieces of different sizes; the driving component can control the movement of the outer wall clamping block, and when the outer wall clamping block rotates to the side facing the grinding disc, it automatically moves away, reducing the possibility of interference with the external cylindrical grinding mechanism.

[0023] 3. The present invention achieves automatic adjustment of the outer wall clamping block through the cooperation of the abutment seat, the reset spring and the guide block; the first reset spring and the second reset spring ensure the clamping force of the outer wall clamping block in a non-interference state; the gradually expanding design of the guide groove enables the guide block to smoothly drive the outer wall clamping block to move when sliding; the structure is simple and highly reliable, reducing the probability of equipment failure. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the rack structure according to an embodiment of this application.

[0026] Figure 3 This is a schematic diagram of the internal grinding spindle box structure in an embodiment of this application.

[0027] Figure 4 This is a schematic diagram of the hollow turntable structure in an embodiment of this application.

[0028] Figure 5 It is along Figure 4 Enlarged view of point A in the middle.

[0029] Figure 6 This is a schematic diagram of the inner structure of the grinding spindle box in an embodiment of this application.

[0030] Figure 7 This is a schematic diagram of the scraper structure in an embodiment of this application.

[0031] Figure 8 This is a schematic diagram of the hollow turntable installation structure according to an embodiment of this application.

[0032] Figure 9 This is a schematic diagram of the abutment structure according to an embodiment of this application.

[0033] Explanation of reference numerals in the attached diagram: 1. Frame; 2. External cylindrical grinding mechanism; 3. External cylindrical grinding spindle box; 4. Grinding disc; 5. XY 6. Shaft moving mechanism; 7. Support slide; 8. Slide groove; 9. Slider; 10. Translation seat; 11. External cylindrical grinding motor; 12. Internal cylindrical grinding mechanism; 13. Internal cylindrical grinding head; 14. Internal cylindrical grinding spindle box; 15. Drive structure; 16. Double-head moving mechanism; 17. First servo motor; 18. Double-headed lead screw; 19. Abutment seat; 20. Hollow turntable; 21. End face abutment block; 22. Outer wall clamping block; 23. Adjusting component; 24. Driving component; 25. Gear ring; 26. Gear; 27. Second servo motor; 28. First return spring; 29. ​​Second return spring; 30. Guide block; 31. Guide groove; 33. End face threaded disc; 34. Bevel gear ring; 35. Bevel gear; 36. Sliding seat; 37. Rotating shaft; 38. X moving seat; 39. X motor; 391. X lead screw; 40. Y Motor; 401, Y-screw; 41, Drainage assembly; 42, scraper; 43, guide plate; 44, drain port; 45, scraper block; 46, hollow rod; 47, scraper bar; 48, scraper strip; 49, coolant flow channel; 50, rotating motor; 51, coolant inlet end. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail to make the technical solution of this application easier to understand and master.

[0035] This application discloses a CNC internal and external cylindrical composite grinding machine.

[0036] Reference Figure 1 and Figure 2 This embodiment of a CNC internal and external cylindrical composite grinding machine includes a frame 1 and an external cylindrical grinding mechanism 2. The external cylindrical grinding mechanism 2 includes an external cylindrical grinding spindle box 3 and a grinding disc 4. The external cylindrical grinding spindle box 3 is movably connected to the frame 1 via an XY-axis moving mechanism 5. The XY-axis moving mechanism 5 includes a support slide 6, an X-axis lead screw driven by an X-axis servo motor, and a Y-axis lead screw driven by a Y-axis servo motor. The support slide 6 is slidably connected to the frame 1 along the Y-axis direction. The Y-axis lead screw is rotatably connected to the frame 1 and passes through and is threadedly connected to the support slide 6. The external cylindrical grinding spindle box 3 is slidably connected to the support slide 6 along the X-axis direction. The X-axis lead screw is rotatably connected to the support slide 6 and passes through and is threadedly connected to the external cylindrical grinding spindle box 3. The external cylindrical grinding spindle box 3 can be moved along the X-axis and Y-axis directions respectively by the X-axis servo motor or the Y-axis servo motor. Precise movement of the shaft; the grinding disc 4 is rotatably connected to the outer cylindrical grinding spindle box 3, and the outer cylindrical grinding motor 11 is installed on the outer cylindrical grinding spindle box 3, which is used to drive the rotation of the grinding disc 4.

[0037] Reference Figure 3 and Figure 4It also includes an internal grinding mechanism 12, which includes two internal grinding heads 13, two internal grinding spindle boxes 14, and a drive structure 15. The two internal grinding spindle boxes 14 are simultaneously slidably connected to the frame 1 along the Y-axis direction through a double-head moving mechanism 16. The double-head moving mechanism 16 includes a double-headed lead screw 18 driven by a first servo motor 17. The threads on both sides of the double-headed lead screw 18 are arranged in opposite directions along the axial direction. The two ends of the double-headed lead screw 18 are respectively threaded through and connected to the two internal grinding spindle boxes 14. The rotation of the double-headed lead screw 18 driven by the first servo motor 17 can realize the sliding of the two internal grinding spindle boxes 14 towards the opposite side.

[0038] Reference Figure 5 and Figure 9 Two internal grinding spindle boxes 14 are rotatably connected to opposite sides by clamping mechanisms. Each clamping mechanism includes a hollow turntable 20, several end-face abutment blocks 21, multiple outer wall clamping blocks 22, adjusting components 23, and a driving component 24. The hollow turntable 20 is rotatably connected to the internal grinding spindle box 14, with one side extending to the outside of the internal grinding spindle box 14. The portion of the hollow turntable 20 located inside the internal grinding spindle box 14 is coaxially and fixedly connected to a gear ring 25. A gear 26 is rotatably connected inside the internal grinding spindle box 14, and the gear 26 meshes with the gear ring 25. A second servo motor 27 is installed on the internal grinding spindle box, driving the rotation of the gear 26. When the second servo motor 27 starts, it drives the hollow turntable 20 to rotate through the meshing of the gear 26 and the gear ring 25.

[0039] Reference Figure 3 and Figure 9 Several end face abutment blocks 21 are slidably connected to the hollow turntable 20 along the axis direction perpendicular to the hollow turntable 20. Adjusting member 23 is used to adjust the distance between several end face abutment blocks 21. Several outer wall clamping blocks 22 are slidably connected to several end face abutment blocks 21 along the axis direction of the hollow turntable 20. Driving member 24 is used to drive the movement of several outer wall clamping blocks 22 respectively. When the outer wall clamping block 22 rotates to the side facing the grinding disc 4, the driving member 24 drives the outer wall clamping block 22 to move away from the grinding disc 4.

[0040] Reference Figure 3 and Figure 9The driving component 24 includes an abutment seat 19, a translation seat 10, a first return spring 28, multiple second return springs 29, and a guide block 30. The translation seat 10 is slidably connected to the inner grinding mill spindle box 14. The abutment seat 19 is slidably connected to the translation seat 10 along a sliding direction perpendicular to the translation seat 10. The first return spring 28 is mounted on the abutment seat 19 and always drives the abutment seat 19 to slide away from the inner grinding mill spindle box 14. The multiple second return springs 29 correspond to multiple outer wall clamps 22 and are respectively located on the corresponding outer wall clamps 22. On the wall clamping block 22, multiple second return springs 29 always drive the corresponding outer wall clamping block 22 to slide away from the inner grinding spindle box 14. Guide grooves 31 are respectively opened on the outer peripheral surface of multiple outer wall clamping blocks 22. The openings on both sides of the guide grooves 31 are gradually widened. The guide block 30 is located on the abutment seat 19 and can slide along the inner wall of the guide groove 31. Several end face abutment blocks 21 are provided with sliding grooves 8. The translation seat 10 is provided with sliders 9. The sliders 9 are always slidably connected in the sliding groove 8 of any end face block.

[0041] Reference Figure 3 and Figure 5 The end face abutment block 21 can be positioned from the end face of the workpiece, and the outer wall clamping block 22 can clamp the outer circumference of the workpiece to achieve stable fixation of the workpiece and prevent the workpiece from shaking during processing, which would affect the accuracy. The adjusting component 23 can adjust the spacing of the end face abutment blocks 21 to adapt to workpieces of different sizes. The driving component 24 can control the movement of the outer wall clamping block 22, and when the outer wall clamping block 22 rotates to the side facing the grinding disc 4, it automatically moves away, reducing the possibility of interference with the external cylindrical grinding mechanism 2. The automatic adjustment of the outer wall clamping block 22 is achieved through the cooperation of the abutment seat 19, the return spring and the guide block 30. The first return spring 28 and the second return spring 29 ensure the clamping force of the outer wall clamping block 22 in a non-interference state. The gradually expanding design of the guide groove 31 allows the guide block 30 to smoothly drive the movement of the outer wall clamping block 22 when sliding. The structure is simple and highly reliable, reducing the probability of equipment failure.

[0042] Reference Figure 3 and Figure 5 Multiple outer wall clamping blocks 22 are rotatably connected to several rollers along a direction perpendicular to the movement direction of the outer wall clamping blocks 22. When the workpiece is clamped, the multiple rollers abut against the outer peripheral surface of the workpiece. The rollers on the outer wall clamping blocks 22 change the sliding friction between the workpiece and the outer wall clamping blocks 22 into rolling friction, reducing the wear on the outer peripheral surface of the workpiece when the outer wall clamping blocks 22 slide, and protecting the surface quality of the workpiece.

[0043] Reference Figure 3 and Figure 4By adding an internal grinding mechanism 12, the equipment can simultaneously perform external and internal grinding functions, eliminating the need to transfer workpieces between different equipment and greatly improving processing efficiency. The two internal grinding heads 13 can simultaneously perform internal grinding from both ends of the workpiece, ensuring processing symmetry and accuracy. Furthermore, the internal grinding spindle box 14 is slidably connected to the frame 1, which can adapt to the processing requirements of workpieces of different lengths and facilitates the simultaneous grinding of the inner and outer walls of cylindrical parts.

[0044] Reference Figure 5 and Figure 8 The adjusting component 23 includes a threaded disc 33, a bevel gear ring 34, and a bevel gear 35. Several end-face abutment blocks 21 are simultaneously threaded onto the threaded disc 33. The threaded disc 33 is coaxially and rotatably connected to the hollow turntable 20. The bevel gear 35 is coaxially and fixedly connected to the threaded disc 33, and rotatably connected to the hollow turntable 20, meshing with the bevel gear disc. Through the cooperation of the threaded disc 33, the bevel gear ring 34, and the bevel gear 35, the synchronous adjustment of multiple end-face abutment blocks 21 is achieved, ensuring the consistency of adjustment. This structure provides precise adjustment and convenient operation.

[0045] Reference Figure 6 and Figure 7 Two internal grinding spindle boxes 14 are respectively movably connected to sliding seats 36, and two rotating shafts 37 are respectively rotatably connected to the two sliding seats 36. Rotary motors 50 are respectively installed on the two sliding seats 36. The rotating motors 50 are used to drive the rotation of the rotating shafts 37. Two internal grinding heads 13 are respectively coaxially installed at the opposite ends of the two rotating shafts 37. The drive structure 15 is used to drive the sliding of the sliding seats 36 and drive the rotating shafts 37 to rotate around their own axes. The drive structure 15 includes an X-moving seat 38, an X-screw 391 driven by an X motor 39, and a Y-screw 401 driven by a Y motor. The X-moving seat 38 is slidably connected to the inner grinding spindle box 14 along the X-axis. The X-screw 391 is rotatably connected to the inner grinding spindle box 14 and is threadedly connected to the X-moving seat 38. The sliding seat 36 is slidably connected to the X-moving seat 38 along the Y-axis. The Y-screw 401 is rotatably connected to the X-moving seat 38 and is threadedly connected to the sliding seat 36.

[0046] Reference Figure 5 and Figure 7The system also includes a discharge assembly 41, which comprises a scraper 42 and a guide plate 43. A discharge port 44 is provided on the internal grinding spindle box 14. The guide plate 43 is fixedly connected within the discharge port 44 and has a scraper block 45. A hollow rod 46 is fixedly connected to the sliding seat 36. The hollow rod 46 is coaxial and sleeved on the outside of the rotating shaft 37. The hollow rod 46 passes through and is movably connected to the scraper block 45. A scraper rod 47 is fixedly connected to the hollow rod 46 and passes through the scraper block 45 together with the hollow rod 46. The scraper block 45 always abuts against the upper and lower surfaces of the scraper 42. A scraper strip 48 is fixedly connected to one side of the scraper 42 in the width direction. The scraper strip 48 is made of rubber or silicone. The side of the scraper strip 48 away from the scraper 42 in the width direction is flush with the outer circumferential surface of the internal grinding head 13. The scraper strip 48 can abut against the inner wall of the workpiece. The scraper 42 is provided with a coolant flow channel 49, the outlet end of the coolant flow channel 49 faces the inner cylindrical grinding head 13, and the coolant inlet end 51 is provided on the sliding seat 36 and is connected to the coolant source of the composite grinding machine and the coolant flow channel 49 through a pipe.

[0047] Reference Figure 5 and Figure 7 The addition of a drainage component 41, along with the cooperation of the scraper 42 and guide plate 43, allows for timely removal of machining debris, preventing debris accumulation from affecting machining accuracy or damaging the equipment, and maintaining a clean working environment. The scraper blade 48 on the scraper 42 can abut against the inner wall of the workpiece, cleaning debris from the inner wall during workpiece rotation and preventing debris residue from affecting the inner diameter machining accuracy. A coolant channel 49 is provided on the scraper 42, allowing coolant to flow directly to the inner diameter grinding head 13 and the machining area, providing cooling and lubrication, reducing grinding head wear, extending its service life, and simultaneously carrying away some debris, enhancing the cleaning effect and further ensuring machining quality.

[0048] Reference Figure 1 and Figure 2 In summary, the operation procedure of this grinding machine is as follows:

[0049] S1 Workpiece clamping and positioning: Start the first servo motor 17 to drive the double-ended lead screw 18 to rotate. Since the threads on both sides of the double-ended lead screw 18 rotate in opposite directions, it drives the two internal grinding spindle boxes 14 to slide along the Y axis in opposite directions until they match the length of the workpiece. According to the size of the workpiece to be processed, adjust the spacing of several end face abutment blocks 21 through the adjusting component 23 so that the end face abutment blocks 21 fit against the end face of the workpiece to achieve positioning. At the same time, the outer wall clamping block 22 abuts against the outer circumferential surface of the workpiece.

[0050] S2 Equipment Position Adjustment: Simultaneously, through the XY axis moving mechanism 5, the X-axis servo motor drives the X-axis lead screw, and the Y-axis servo motor drives the Y-axis lead screw, thereby moving the external cylindrical grinding spindle box 3 along the X and Y axes, so that the grinding disc 4 of the external cylindrical grinding mechanism 2 is aligned with the outer cylindrical processing area of ​​the workpiece.

[0051] S3 Grinding Start: Start the external cylindrical grinding motor 11 to drive the grinding disc 4 to rotate and grind the outer circle of the workpiece; at the same time, start the rotating motor 50 on the internal cylindrical grinding spindle box 14 to drive the rotating shaft 37 to drive the internal cylindrical grinding head 13 to rotate, and then adjust the position of the internal cylindrical grinding head 13 through the drive mechanism so that the two internal cylindrical grinding heads 13 grind the inner circle of the workpiece from both ends at the same time.

[0052] S4 Machining Process Assistance: During machining, the discharge component 41 works synchronously. When the sliding seat 36 moves, it drives the hollow rod 46 and scraper 47 to move. The scraper block 45 cooperates with the scraper 42 to clean the machining debris. The scraper strip 48 on the scraper 42 abuts against the inner wall of the workpiece and cleans the debris on the inner wall as the workpiece rotates. At the same time, the coolant source of the compound grinding machine delivers coolant to the coolant flow channel 49 of the scraper 42 through the pipeline. The coolant flows from the outlet end to the inner cylindrical grinding head 13 and the machining area to achieve cooling, lubrication, and assist in removing debris.

[0053] S5 Machining Posture Adaptation: When machining the outer circumferential surface of the workpiece end, the grinding disc 4 abuts against the abutment seat 19, changing the position of the abutment seat 19 and the guide block 30. The guide block 30 slides along the guide groove 31 of the outer wall clamping block 22, driving the outer wall clamping block 22 to move away from the grinding disc 4, avoiding interference with the outer cylindrical grinding mechanism 2. In the non-interference state, the outer wall clamping block 22 ensures radial limitation of the workpiece.

[0054] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. A CNC internal and external cylindrical composite grinding machine, comprising a frame (1) and an external cylindrical grinding mechanism (2), wherein the external cylindrical grinding mechanism (2) comprises an external cylindrical grinding spindle box (3) and a grinding disc (4), wherein the external cylindrical grinding spindle box (3) is movably connected to the frame (1), and the grinding disc (4) is rotatably connected to the external cylindrical grinding spindle box (3), characterized in that: It also includes an internal grinding mechanism (12), which includes two internal grinding heads (13), two internal grinding spindle boxes (14) and a drive structure (15). The two internal grinding spindle boxes (14) are slidably connected to the frame (1). A clamping mechanism is rotatably connected to the opposite side of the two internal grinding spindle boxes (14). Sliding seats (36) are slidably connected inside the two internal grinding spindle boxes (14). Rotating shafts (37) are rotatably connected to the two sliding seats (36). The two internal grinding heads (13) are coaxially mounted on the opposite ends of the two rotating shafts (37). The drive structure (15) is used to drive the sliding of the sliding seats (36) and drive the rotating shafts (37) to rotate around their own axes. The clamping mechanism includes a hollow turntable (20), a plurality of end face abutment blocks (21), a plurality of outer wall clamping blocks (22), an adjusting member (23), and a driving member (24). The hollow turntable (20) is rotatably connected to the inner grinding spindle box (14). The plurality of end face abutment blocks (21) are slidably connected to the hollow turntable (20) along the axial direction perpendicular to the hollow turntable (20). The adjusting member (23) is used to adjust the spacing between the plurality of end face abutment blocks (21). The plurality of outer wall clamping blocks (22) are slidably connected to the plurality of end face abutment blocks (21) along the axial direction of the hollow turntable (20). The driving member (24) is used to drive the movement of the plurality of outer wall clamping blocks (22). When the outer wall clamping block (22) rotates to the side facing the grinding disc (4), the driving member (24) drives the outer wall clamping block (22) to move away from the grinding disc (4). The driving component (24) includes an abutment seat (19), a translation seat (10), a first return spring (28), multiple second return springs (29), and a guide block (30). The translation seat (10) is slidably connected to the inner grinding spindle box (14). The abutment seat (19) is slidably connected to the translation seat (10) along a sliding direction perpendicular to the translation seat (10). The first return spring (28) is mounted on the abutment seat (19) and always drives the abutment seat (19) to slide away from the inner grinding spindle box (14). The multiple second return springs (29) correspond to multiple outer wall clamps (22) and are respectively located on the corresponding outer wall clamps. On block (22), multiple second return springs (29) always drive the corresponding outer wall clamping block (22) to slide away from the inner grinding spindle box (14). The outer peripheral surfaces of multiple outer wall clamping blocks (22) are respectively provided with guide grooves (31). The openings on both sides of the guide grooves (31) are gradually widened. The guide block (30) is provided on the abutment seat (19) and can slide along the inner wall of the guide groove (31) in the guide groove (31). Several end face abutment blocks (21) are provided with sliding grooves (8). The translation seat (10) is provided with sliders (9). The sliders (9) are always slidably connected in the sliding groove (8) of any end face block.

2. The CNC internal and external cylindrical composite grinding machine according to claim 1, characterized in that: The adjusting component (23) includes a threaded disc (33), a bevel gear ring (34), and a bevel gear (35). Several end face abutment blocks (21) are threadedly connected to the threaded disc (33). The threaded disc (33) is coaxial and rotatably connected to the hollow turntable (20). The bevel gear (35) is coaxial and fixedly connected to the threaded disc (33). The bevel gear (35) is rotatably connected to the hollow turntable (20) and meshes with the bevel gear disc.

3. The CNC internal and external cylindrical composite grinding machine according to claim 1, characterized in that: It also includes a discharge assembly (41), which includes a scraper (42) and a guide plate (43). The inner grinding spindle box (14) is provided with a discharge port (44). The guide plate (43) is fixedly connected to the discharge port (44). The guide plate (43) is provided with a scraper block (45). A hollow rod (46) is fixedly connected to the sliding seat (36). The hollow rod (46) is coaxial and sleeved on the outside of the rotating shaft (37). The hollow rod (46) passes through and is movably connected to the scraper block (45). The scraper rod (47) is fixedly connected to the hollow rod (46) and passes through the scraper block (45) together with the hollow rod (46). The scraper block (45) always abuts against the upper and lower surfaces of the scraper (42).

4. A CNC internal and external cylindrical composite grinding machine according to claim 3, characterized in that: The scraper (42) is provided with a coolant flow channel (49), the outlet end of the coolant flow channel (49) faces the inner grinding head (13), and the sliding seat (36) is provided with a coolant inlet end (51), which is connected to the coolant source through a pipe.

5. A CNC internal and external cylindrical composite grinding machine according to claim 3, characterized in that: The scraper (42) has a scraper strip (48) on one side in the width direction, and the scraper strip (48) can abut against the inner wall of the workpiece.

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