A thin-walled cylindrical workpiece machining unit
By designing a sliding double-turret slide plate and a thin-walled cylindrical workpiece machining unit with symmetrically arranged inner and outer tools, the deformation problem in the machining process of thin-walled cylindrical workpieces was solved, and the inner and outer walls were machined simultaneously, improving efficiency and yield.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-11
- Publication Date
- 2026-06-16
AI Technical Summary
When machining thin-walled cylindrical workpieces, traditional methods cause workpiece deformation and separate machining of the inner and outer walls, affecting machining efficiency and yield.
A thin-walled cylindrical workpiece machining unit is designed, which adopts a sliding double-turret slide plate with symmetrical inner and outer tools to achieve simultaneous machining of the inner and outer walls, and stabilizes the workpiece through a vibration damping mechanism to avoid deformation.
It improves processing efficiency, ensures workpiece stress balance, prevents deformation, reduces manufacturing costs, and is suitable for mass production.
Smart Images
Figure CN224359378U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automated production and processing, and in particular to a thin-walled cylindrical workpiece processing unit. Background Technology
[0002] In industrial production and processing, it is often necessary to process cylindrical workpieces. During processing, the workpiece is clamped on the fixture of the machine tool, the machine tool drives the cylindrical workpiece to rotate at high speed, and at the same time the cutting head approaches the inner or outer wall of the workpiece to process it.
[0003] However, when the workpiece wall thickness is thin, if the above-mentioned device is still used for processing, the cutting force during the processing will cause the workpiece to deform, resulting in a very low yield rate. Moreover, in the traditional processing method, the inner wall processing and the outer wall processing chamber are carried out separately, which will lengthen the overall processing time, affect work efficiency, and make it difficult to achieve mass production.
[0004] Therefore, a method or apparatus is needed to solve the above problems. Summary of the Invention
[0005] This invention aims to address the aforementioned shortcomings of existing technologies by proposing a processing unit that is simple in structure, ingeniously designed, rationally laid out, and capable of efficiently and conveniently processing thin-walled cylindrical workpieces.
[0006] The technical solution of this utility model is: a thin-walled cylindrical workpiece processing unit, including a bed 1, characterized in that: the bed 1 is equipped with a spindle mechanism, a material receiving mechanism, a tailstock mechanism, a double turret mechanism, and a chip removal mechanism.
[0007] The spindle mechanism includes a spindle 2 rotatably supported on the bed 1. A through-hole tie rod 3 is provided inside the spindle 2, and a gripper 4 is provided at the end of the spindle 2. The spindle 2 is connected to the output end of a spindle motor 6 via a belt pulley drive pair 5. One end of the through-hole tie rod 3 is connected to the working end of a hydraulic cylinder 7. The hydraulic cylinder 7 has a chip removal hole 8 that matches the through-hole tie rod 3, and the hydraulic cylinder 7 is also mounted on the bed 1.
[0008] The receiving mechanism includes a receiving mechanism bracket 9 fixedly connected to the bed 1. A receiving platform 11 is slidably connected to the receiving mechanism bracket 9 via a receiving mechanism linear guide 10. A receiving cylinder 12 is provided on the top of the receiving mechanism bracket 9. The working end of the receiving cylinder 12 is connected to the receiving platform 11. Two receiving plates 13 are provided on the receiving platform 11. The receiving plates 13 are provided with arc-shaped receiving claws 14 that match the outer wall of the workpiece, and these two arc-shaped receiving claws 14 are distributed along the axial direction of the spindle 2.
[0009] The tailstock mechanism includes a tailstock cylinder 15 fixedly connected to the bed 1. The working end of the tailstock cylinder 15 is connected to a tailstock slide 16 slidably connected to the bed 1. A top material sleeve bracket 17 is provided on the tailstock slide 16, and a top material sleeve 18 is rotatably supported inside the top material sleeve bracket 17 via bearings.
[0010] The dual-turret mechanism includes a dual-turret slide plate 19, which is slidably connected to the machine bed 1 via a turret linear guide rail 20, and the turret linear guide rail 20 is parallel to the spindle 2. A turret motor 21 is mounted on the machine bed 1, and the working end of the turret motor 21 is connected to a leadscrew. The leadscrew is connected to a lead screw nut mounted on the back side of the turret slide plate 19. An inner turret assembly 22 and an outer turret assembly 23 are mounted on the turret slide plate 19.
[0011] The inner turret assembly 22 includes an inner turret motor 24 fixedly mounted on the double turret slide plate 19. The inner turret motor 24 is connected to the inner turret slide plate 25 via a lead screw and nut transmission pair. The inner turret slide plate 25 is slidably connected to the double turret slide plate 19 via a linear guide slider structure. An inner turret 26 is mounted on the inner turret slide plate 25, and an inner wall tool 28 is mounted at the end of the inner turret 26.
[0012] The outer turret assembly 23 includes an outer turret motor 29 fixedly mounted on the double turret slide plate 19. The outer turret motor 29 is connected to the outer turret slide plate 30 via a lead screw and nut transmission pair. The outer turret slide plate 30 is slidably connected to the double turret slide plate 19 via a linear guide slider structure. An outer turret 31 is mounted on the outer turret slide plate 30, and an outer wall tool 32 is mounted on the outer turret 31.
[0013] The inner wall cutter 28 and the outer wall cutter 32 are arranged opposite to each other.
[0014] The chip removal mechanism includes a chip receiving cover 33 mounted on the bed 1. The chip receiving cover 33 is located in the outlet direction of the chip removal hole 8. A chip conveying device 34 is mounted below the chip receiving cover 33. A chip collection cart 35 is mounted at the outlet of the chip conveying device 34.
[0015] The dual-turret slide plate 19 is also provided with a vibration damping mechanism, which includes a vibration damping support plate 36 fixedly connected to the dual-turret slide plate 19. The vibration damping support plate 36 has a through hole for the workpiece to pass through, and three vibration damping cylinders 37 evenly distributed in the circumferential direction are also provided on the vibration damping support plate 36. The end of the vibration damping cylinder 37 is provided with a ball, which can contact the outer circle of the workpiece.
[0016] The end of the inner turret 26 is provided with a first rotating tool holder 38, which can rotate under the drive of a rotating motor located inside the inner turret 26. The side wall of the first rotating tool holder 38 is provided with a plurality of tool mounting slots 39 evenly distributed in the circumferential direction. Different tool mounting slots 39 are provided with different inner wall tools 28. Cooling water holes matching the inner wall tools 28 are also provided on the first rotating tool holder 38.
[0017] The end of the outer turret 31 is provided with a second rotating tool holder 40. The second rotating tool holder 40 can rotate under the drive of a rotating motor located inside the outer turret 31. The outer circumference of the second rotating tool holder 40 is provided with a plurality of tool mounting slots 39 evenly distributed in the circumferential direction. Different tool mounting slots 39 are provided with different outer wall tools 32. Cooling water holes matching the outer wall tools 32 are also provided on the second rotating tool holder 40.
[0018] Compared with the prior art, this utility model has the following advantages:
[0019] This type of thin-walled cylindrical workpiece machining unit features a simple structure, ingenious design, and rational layout. It addresses the problem of easy deformation of thin-walled workpieces when machining with traditional machining equipment by incorporating a unique structure. It utilizes a double-turret slide plate slidably connected to the machine bed, housing an inner and outer turret assembly that moves with the slide plate. The cutting tools (inner and outer wall tools) within the two assemblies are positioned opposite each other. This structure allows for simultaneous machining of both the inner and outer walls, improving work efficiency. Furthermore, the simultaneous application of force from both internal and external directions ensures a balanced force on the machined portion of the workpiece, effectively preventing deformation during machining. Therefore, it can machine relatively thin cylindrical workpieces. Moreover, this machining unit is simple to manufacture and inexpensive, possessing numerous advantages and making it particularly suitable for widespread application in this field, with a very promising market prospect. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.
[0021] Figure 2 This is a three-dimensional structural schematic diagram of an embodiment of the present utility model (with the outer shell removed in direction one).
[0022] Figure 3 This is a three-dimensional structural schematic diagram of an embodiment of the present utility model (with the outer shell removed in direction one).
[0023] Figure 4 yes Figure 3 Enlarged view of part A in the image.
[0024] Figure 5 This is a schematic diagram of the tail-top mechanism in an embodiment of this utility model.
[0025] Figure 6 yes Figure 5 Sectional view along direction AA.
[0026] Figure 7 This is a schematic diagram of the main shaft mechanism in an embodiment of this utility model.
[0027] Figure 8 This is a schematic diagram of the material receiving mechanism in an embodiment of this utility model.
[0028] Figure 9 yes Figure 8 BB-direction sectional view.
[0029] Figure 10 This is a structural schematic diagram of the vibration damping mechanism in an embodiment of this utility model. Detailed Implementation
[0030] The specific embodiments of this utility model will be described below with reference to the accompanying drawings. Figures 1 to 10 As shown: A thin-walled cylindrical workpiece machining unit includes a bed 1 as the base, on which a spindle mechanism, a material receiving mechanism, a tailstock mechanism, a double turret mechanism, and a chip removal mechanism are arranged.
[0031] The spindle mechanism includes a spindle 2 rotatably supported on the bed 1. A through-hole tie rod 3 is provided inside the spindle 2, and a gripper 4 is provided at the end of the spindle 2. The spindle 2 is connected to the output end of a spindle motor 6 via a belt pulley drive pair 5. One end of the through-hole tie rod 3 is connected to the working end of a hydraulic cylinder 7. The hydraulic cylinder 7 has a chip removal hole 8 that matches the through-hole tie rod 3, and the hydraulic cylinder 7 is also mounted on the bed 1.
[0032] The receiving mechanism includes a receiving mechanism bracket 9 fixedly connected to the bed 1. A receiving platform 11 is slidably connected to the receiving mechanism bracket 9 via a receiving mechanism linear guide 10. A receiving cylinder 12 is provided on the top of the receiving mechanism bracket 9. The working end of the receiving cylinder 12 is connected to the receiving platform 11. Two receiving plates 13 are provided on the receiving platform 11. The receiving plates 13 are provided with arc-shaped receiving claws 14 that match the outer wall of the workpiece, and these two arc-shaped receiving claws 14 are distributed along the axial direction of the spindle 2.
[0033] The tailstock mechanism includes a tailstock cylinder 15 fixedly connected to the bed 1. The working end of the tailstock cylinder 15 is connected to a tailstock slide 16 slidably connected to the bed 1. A top material sleeve bracket 17 is provided on the tailstock slide 16, and a top material sleeve 18 is rotatably supported inside the top material sleeve bracket 17 via bearings.
[0034] The dual-turret mechanism includes a dual-turret slide plate 19, which is slidably connected to the machine bed 1 via a turret linear guide rail 20, and the turret linear guide rail 20 is parallel to the spindle 2. A turret motor 21 is mounted on the machine bed 1, and the working end of the turret motor 21 is connected to a leadscrew. The leadscrew is connected to a lead screw nut mounted on the back side of the turret slide plate 19. An inner turret assembly 22 and an outer turret assembly 23 are mounted on the turret slide plate 19.
[0035] The inner turret assembly 22 includes an inner turret motor 24 fixedly mounted on the double turret slide plate 19. The inner turret motor 24 is connected to the inner turret slide plate 25 via a lead screw and nut transmission pair. The inner turret slide plate 25 is slidably connected to the double turret slide plate 19 via a linear guide slider structure. An inner turret 26 is mounted on the inner turret slide plate 25, and an inner wall tool 28 is mounted at the end of the inner turret 26.
[0036] The outer turret assembly 23 includes an outer turret motor 29 fixedly mounted on the double turret slide plate 19. The outer turret motor 29 is connected to the outer turret slide plate 30 via a lead screw and nut transmission pair. The outer turret slide plate 30 is slidably connected to the double turret slide plate 19 via a linear guide slider structure. An outer turret 31 is mounted on the outer turret slide plate 30, and an outer wall tool 32 is mounted on the outer turret 31.
[0037] The inner wall cutter 28 and the outer wall cutter 32 are arranged opposite to each other.
[0038] The chip removal mechanism includes a chip receiving cover 33 mounted on the bed 1. The chip receiving cover 33 is located in the outlet direction of the chip removal hole 8. A chip conveying device 34 is mounted below the chip receiving cover 33. A chip collection cart 35 is mounted at the outlet of the chip conveying device 34.
[0039] The dual-turret slide plate 19 is also provided with a vibration damping mechanism, which includes a vibration damping support plate 36 fixedly connected to the dual-turret slide plate 19. The vibration damping support plate 36 has a through hole for the workpiece to pass through, and three vibration damping cylinders 37 evenly distributed in the circumferential direction are also provided on the vibration damping support plate 36. The end of the vibration damping cylinder 37 is provided with a ball, which can contact the outer circle of the workpiece.
[0040] The end of the inner turret 26 is provided with a first rotating tool holder 38, which can rotate under the drive of a rotating motor located inside the inner turret 26. The side wall of the first rotating tool holder 38 is provided with a plurality of tool mounting slots 39 evenly distributed in the circumferential direction. Different tool mounting slots 39 are provided with different inner wall tools 28. Cooling water holes matching the inner wall tools 28 are also provided on the first rotating tool holder 38.
[0041] The end of the outer turret 31 is provided with a second rotating tool holder 40. The second rotating tool holder 40 can rotate under the drive of a rotating motor located inside the outer turret 31. The outer circumference of the second rotating tool holder 40 is provided with a plurality of tool mounting slots 39 evenly distributed in the circumferential direction. Different tool mounting slots 39 are provided with different outer wall tools 32. Cooling water holes matching the outer wall tools 32 are also provided on the second rotating tool holder 40.
[0042] The working process of the thin-walled cylindrical workpiece processing unit of this utility model embodiment is as follows: When a thin-walled cylindrical workpiece needs to be processed, the loading and unloading robot arm matched with this processing unit moves to pick up a workpiece to be processed from the material rack and transport it into the processing unit. Specifically, the workpiece is transported between the gripper 4 and the top sleeve 18. One end of the workpiece is inserted into the gripper 4. After it is in place, the control system controls the gripper 4 to move and clamp the workpiece. After the workpiece is clamped, the robot arm releases the workpiece and moves it away. Then the control system controls the tail cylinder 15 to work, driving the tail slide 16 to move relative to the bed 1. The top sleeve 18 presses against the other end of the workpiece. At this time, the workpiece is fixed between the gripper 4 and the top sleeve 18, completing the loading operation.
[0043] The main spindle motor 6 operates and drives the main spindle 2 to rotate through the belt pulley transmission pair 5. Since the ejector sleeve 18 is rotatably connected to the ejector sleeve bracket 17 through the bearing, the workpiece can be rotated at high speed under the drive of the main spindle 2.
[0044] At the same time, the control system will also control the turret motor 21 to work, and drive the double turret slide plate 19 and the inner and outer turret components on it to move together through the lead screw-lead nut transmission pair, so that the inner turret 26 can drive the inner wall tool 28 into the workpiece. At this time, the inner wall tool 28 and the outer wall tool 32 will move to the processing position under the drive of the double turret slide plate 19.
[0045] Then the control system sends signals to the inner turret motor 24 and the outer turret motor 29 respectively. The inner turret motor 24 works, driving the inner turret slide plate 25 (i.e. the inner wall tool 28) to rise. The inner wall tool 28 contacts the inner wall of the workpiece and processes it. The outer turret motor 29 works, driving the outer turret slide plate 30 to fall. The outer wall tool 32 contacts the outer wall of the workpiece and processes it.
[0046] Since the inner wall tool 28 and the outer wall tool 32 are spatially opposite, when they are processed, it is equivalent to processing the inner and outer sides of the same point of the workpiece at the same time. The forces on the inner and outer sides of the processing point are balanced, which can effectively improve work efficiency and prevent the workpiece from deforming.
[0047] Simultaneously with the above actions, the turret motor 21 operates, driving the double turret slide plate 19 to move at a constant speed, so as to realize the movement of the inner wall tool 28 and the outer wall tool 32 along the workpiece axis. Combined with the cutting actions of the inner and outer tools, the inner and outer walls of the workpiece are processed simultaneously in one step.
[0048] After machining, the spindle 2 stops rotating, the tailstock cylinder 15 reverses its direction, and the ejector sleeve 18 disengages from the workpiece. Then, the control system controls the receiving cylinder 12 in the receiving mechanism to move, driving the receiving platform 11 upward. After the receiving platform 11 reaches its position, it stops. At this point, the two arc-shaped receiving claws 14 are directly below the workpiece (but not in contact with it). Then, the spindle 2 restarts rotating, but at a relatively slower speed. The outer wall tool 32 feeds towards the workpiece, cutting it off. The cut-off portion is still held by the chucks 4, while the machined workpiece... The material falls onto the arc-shaped receiving claw 14 and is supported by it. Then, the turret motor 21 operates, driving the double turret slide plate 19 to move in the opposite direction, driving the inner turret assembly 22 to exit from the workpiece. The vibration damping mechanism also disengages from the workpiece. At this time, the workpiece is not obstructed in the radial direction. The robot arm removes it from the two arc-shaped receiving claws 14 and places it on the material rack. All mechanisms return to their initial positions. Then, the robot arm turns and removes the material head from the gripper 4 by clamping it with an internal support (the gripper 4 cooperates with the robot arm to relax). This completes one full processing operation.
[0049] When machining a workpiece, the outer wall of the workpiece is simultaneously pressed against the balls at the ends of multiple damping cylinders 37 in the damping mechanism. During the rotation of the workpiece, the damping cylinders 37 are always in a pressure-holding state, thereby stabilizing the workpiece and absorbing the vibration generated during the rotation of the workpiece. This structure can help keep the axis of the workpiece stable, thereby ensuring machining accuracy.
[0050] During the above-mentioned operation, the cutting chips generated when machining the outer wall of the workpiece are directly carried away by the cooling water, while the cutting chips generated when machining the inner wall of the workpiece are flushed into the chip discharge hole 8 by the cooling water sprayed from the chip flushing system, and finally enter the chip receiving cover 33. After the cutting chips are discharged from the outlet of the chip receiving cover 33, they fall into the bottom of the chip conveying device 34, and are finally transported to the chip collection cart 35 under the action of the chip conveying device 34.
Claims
1. A thin-walled cylindrical workpiece processing unit, comprising a bed (1), characterized in that: The bed (1) is equipped with a spindle mechanism, a receiving mechanism, a tailstock mechanism, a double turret mechanism, and a chip removal mechanism. The spindle mechanism includes a spindle (2) rotatably supported on the bed (1), a through-hole tie rod (3) is provided inside the spindle (2), and a gripper (4) is provided at the end of the spindle (2). The spindle (2) is connected to the output end of the spindle motor (6) through a belt pulley transmission pair (5). One end of the through-hole tie rod (3) is connected to the working end of the hydraulic cylinder (7). The hydraulic cylinder (7) has a chip removal hole (8) that matches the through-hole tie rod (3), and the hydraulic cylinder (7) is also provided on the bed (1). The receiving mechanism includes a receiving mechanism bracket (9) fixedly connected to the bed (1). A receiving platform (11) is slidably connected to the receiving mechanism bracket (9) via a receiving mechanism linear guide (10). A receiving cylinder (12) is provided on the top of the receiving mechanism bracket (9). The working end of the receiving cylinder (12) is connected to the receiving platform (11). Two receiving plates (13) are provided on the receiving platform (11). Arc-shaped receiving claws (14) matching the outer wall of the workpiece are provided on the receiving plates (13). These two arc-shaped receiving claws (14) are distributed along the axial direction of the spindle (2). The tail-top mechanism includes a tail-top cylinder (15) fixedly connected to the bed (1). The working end of the tail-top cylinder (15) is connected to the tail-top slide (16) slidably connected to the bed (1). The tail-top slide (16) is provided with a top material sleeve bracket (17). The top material sleeve bracket (17) is rotatably supported by a bearing. The dual turret mechanism includes a dual turret slide plate (19), which is slidably connected to the bed (1) via a turret linear guide rail (20). The turret linear guide rail (20) is parallel to the spindle (2). A turret motor (21) is provided on the bed (1). The working end of the turret motor (21) is connected to a lead screw. The lead screw is connected to a lead screw nut seat provided on the back side of the turret slide plate (19). An inner turret assembly (22) and an outer turret assembly (23) are provided on the turret slide plate (19). The inner turret assembly (22) includes an inner turret motor (24) fixedly mounted on the double turret slide plate (19). The inner turret motor (24) is connected to the inner turret slide plate (25) via a lead screw and nut transmission pair. The inner turret slide plate (25) is slidably connected to the double turret slide plate (19) via a linear guide slider structure. An inner turret (26) is provided on the inner turret slide plate (25), and an inner wall tool (28) is provided at the end of the inner turret (26). The outer turret assembly (23) includes an outer turret motor (29) fixedly mounted on the double turret slide plate (19). The outer turret motor (29) is connected to the outer turret slide plate (30) through a lead screw and nut transmission pair. The outer turret slide plate (30) is slidably connected to the double turret slide plate (19) through a linear guide slider structure. An outer turret (31) is provided on the outer turret slide plate (30), and an outer wall tool (32) is provided on the outer turret (31). The inner wall cutter (28) and the outer wall cutter (32) are arranged opposite to each other. The chip removal mechanism includes a chip receiving cover (33) installed on the bed (1). The chip receiving cover (33) is located in the outlet direction of the chip removal hole (8). A chip conveying device (34) is installed below the chip receiving cover (33). A chip collection cart (35) is installed at the outlet of the chip conveying device (34).
2. The thin-walled cylindrical workpiece processing unit according to claim 1, characterized in that: The dual-turret slide plate (19) is also provided with a vibration damping mechanism. The vibration damping mechanism includes a vibration damping support plate (36) fixedly connected to the dual-turret slide plate (19). The vibration damping support plate (36) is provided with a through hole for the workpiece to pass through. The vibration damping support plate (36) is also provided with three vibration damping cylinders (37) evenly distributed in the circumferential direction. The end of the vibration damping cylinder (37) is provided with a ball, which can contact the outer circle of the workpiece.
3. The thin-walled cylindrical workpiece processing unit according to claim 1, characterized in that: The end of the inner turret (26) is provided with a first rotating tool holder (38). The first rotating tool holder (38) can rotate under the drive of a rotating motor located inside the inner turret (26). The side wall of the first rotating tool holder (38) is provided with a plurality of tool mounting slots (39) evenly distributed in the circumferential direction. Different inner wall tools (28) are provided in different tool mounting slots (39). Cooling water holes matching the inner wall tools (28) are also provided on the first rotating tool holder (38).
4. The thin-walled cylindrical workpiece processing unit according to claim 1, characterized in that: The end of the outer turret (31) is provided with a second rotating tool holder (40). The second rotating tool holder (40) can rotate under the drive of a rotating motor located inside the outer turret (31). The outer circumference of the second rotating tool holder (40) is provided with a plurality of tool mounting slots (39) evenly distributed in the circumferential direction. Different tool mounting slots (39) are provided with different outer wall tools (32). Cooling water holes matching the outer wall tools (32) are also opened on the second rotating tool holder (40).