Clamping device for thin-wall part

Abstract

The utility model provides a thin-wall part clamping device which comprises a supporting assembly and an ejector rod, the supporting assembly comprises a sliding block, and the sliding block is connected with the ejector rod in a sliding mode. The clamping device further comprises an expansion mold column, a supporting ring is installed on the step face of the expansion mold column, and the supporting ring is in clearance fit with the expansion mold column. The ejector rod moves in the axial direction of the expanding mold column after being inserted into the expanding mold column, and the supporting assembly is outwards supported to the inner wall of the supporting ring so as to clamp the thin-wall part. The thin-wall part is placed in the clamping device in the axial direction of the expanding mold column, so that the end face of the thin-wall part abuts against the supporting ring, and the supporting ring plays a role in supporting the thin-wall part. The ejector rod drives the sliding block to move, the supporting assembly is outwards supported to the inner wall of the supporting ring, at the moment, the supporting assembly stops outwards supporting, the supporting assembly is tightly matched with the thin-wall part, the thin-wall part is clamped, and the thin-wall part is axially limited, so that the situation that the supporting assembly is outwards supported excessively, and consequently the thin-wall part is deformed is prevented; and clamping devices of different models can be rapidly switched.

Description

Technical Field

[0001] This utility model relates to the field of thin-walled parts clamping technology, and in particular to a clamping device for thin-walled parts. Background Technology

[0002] Because thin-walled parts are prone to deformation, using existing lathe jaws or fixtures for clamping and machining can cause deformation and affect their use if the clamping force is too large. Conversely, insufficient clamping force will reduce machining accuracy and affect the overall performance.

[0003] Existing technologies cannot effectively control the clamping force of the internal support when machining thin-walled parts. Manual clamping can easily lead to deformation of thin-walled parts, and parts replacement is also done manually. For example, in one scenario, the front nut needs to be manually removed before replacing the part, which results in slow processing efficiency when dealing with large-volume production.

[0004] Therefore, there is a need for a clamping device that can clamp thin-walled parts of different sizes by quickly switching parts. Utility Model Content

[0005] To overcome the problems existing in related technologies, the purpose of this utility model is to provide a clamping device for thin-walled parts, which can clamp thin-walled parts of different sizes and has high processing efficiency.

[0006] A clamping device for thin-walled parts includes a support assembly and a push rod. The support assembly includes a slider that is slidably connected to the push rod. The clamping device also includes an expanding mold column with a support ring mounted on its stepped surface. The support ring is clearance-fitted with the expanding mold column. After the push rod is inserted into the expanding mold column, it moves along the axial direction of the expanding mold column. The support assembly extends outward to the inner wall of the support ring to clamp the thin-walled part.

[0007] In a preferred embodiment of this invention, the slider is provided with a dovetail boss, and the top rod is provided with a dovetail groove, wherein the dovetail boss and the dovetail groove are slidably connected.

[0008] In a preferred embodiment of this invention, a swelling block is connected to the side of the slider away from the dovetail boss, and one side of the swelling block abuts against or has a gap with the support ring.

[0009] In a preferred embodiment of this invention, the expansion block has a first screw hole, and the slider has a second screw hole on the side near the expansion block, and the first screw hole and the second screw hole are adapted to each other.

[0010] In a preferred embodiment of this invention, the first end face of the ejector rod is provided with an ejector pin hole, and a rotary ejector pin is inserted into the ejector pin hole. The rotary ejector pin is used to push the ejector rod to move axially along the axis of the expansion mold column.

[0011] In a preferred embodiment of this invention, a central hole is provided on the end face of the expansion mold column, the central hole penetrates the expansion mold column, and the ejector rod is inserted into the central hole.

[0012] In a preferred embodiment of this invention, a square hole is provided on the side of the expansion mold column, and the support component is installed in the square hole.

[0013] In a preferred embodiment of this invention, a first washer is connected to the first end face of the expanding mold column, and the push rod passes through the first washer; a third screw hole is provided on the first washer, and a fourth screw hole is provided on the first end face of the expanding mold column, and the third screw hole and the fourth screw hole are adapted to each other.

[0014] In a preferred embodiment of this invention, a second washer is connected to the second end face of the expansion mold column, a fifth screw hole is provided on the second washer, and a sixth screw hole is provided on the second end face of the expansion mold column, the fifth screw hole and the sixth screw hole being adapted to each other.

[0015] In a preferred embodiment of this invention, an elastic element is placed inside the central hole, with the first end of the elastic element abutting against the second washer ring and the second end of the elastic element abutting against the second end face of the top rod.

[0016] In a preferred embodiment of this invention, the sidewall of the expansion mold column is provided with a plurality of support components.

[0017] In a preferred embodiment of this invention, the second end face of the expansion mold column with a flange fixing hole is provided with a flange fixing threaded hole, and the fixing flange is installed in the flange fixing threaded hole.

[0018] In a preferred embodiment of this invention, the clamping device for thin-walled parts further includes a pull rod, which is connected to a top rod with a threaded hole. A pneumatic component is connected to one end of the pull rod away from the top rod with the threaded hole.

[0019] In a preferred embodiment of this invention, the pneumatic assembly includes a lathe cylinder and a cylinder connecting device. The first end of the cylinder connecting device is connected to the pull rod, and the second end of the cylinder connecting device is connected to the lathe cylinder.

[0020] The beneficial effects of this utility model are as follows:

[0021] This utility model provides a clamping device for thin-walled parts, including a support assembly and a push rod. The support assembly includes a slider, which is slidably connected to the push rod. The clamping device also includes an expanding mold column, on which a support ring is mounted. The support ring is clearance-fitted with the expanding mold column. After the push rod is inserted into the expanding mold column, it moves along the axial direction of the expanding mold column. The support assembly extends outward to the inner wall of the support ring to clamp the thin-walled part. First, a suitable support ring is selected to ensure that the inner wall size of the support ring is the same as the inner wall size of the thin-walled part to be processed. The support ring is then installed on the stepped surface of the expanding mold column. Next, the thin-walled part is placed into the clamping device along the axial direction of the expanding mold column, so that the end face of the thin-walled part abuts against the support ring. At this time, the support ring provides support for the thin-walled part. The push rod drives the slider to move, causing the support assembly to extend outwards to the inner wall of the support ring. At this point, the support assembly stops extending outwards, and it tightly engages with the thin-walled part, clamping it and preventing axial displacement. After machining the thin-walled part, pushing the push rod back to its initial position, which then drives the slider to return the support assembly to its initial position, leaving a gap between the support assembly and the thin-walled part for easy removal. The inner diameter of the support ring is designed according to the inner wall dimensions of the thin-walled part to prevent excessive outward extension of the support assembly, which could cause deformation of the thin-walled part. When machining thin-walled parts of different sizes, only the support ring needs to be replaced, enabling rapid switching between different clamping device models. This significantly reduces the variety of clamping devices used for thin-walled parts, lowers production costs, and improves machining efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the clamping device for thin-walled parts according to this utility model;

[0023] Figure 2 This is a schematic diagram of the working structure of the clamping device for thin-walled parts of this utility model;

[0024] Figure 3 This is an exploded view of the clamping device for thin-walled parts according to this utility model;

[0025] Figure 4 This is a cross-sectional view of the clamping device for thin-walled parts according to this utility model;

[0026] Figure 5 This is a top view of the clamping device for thin-walled parts according to this utility model;

[0027] Figure 6 This is a structural schematic diagram of the support component and the top rod of this utility model;

[0028] Figure 7 This is a structural schematic diagram of the support component of this utility model;

[0029] Figure 8 This is a schematic diagram of the top rod of this utility model;

[0030] Figure 9 This is a schematic diagram of the expansion mold column of this utility model;

[0031] Figure 10 This is a schematic diagram of the slider of this utility model;

[0032] Figure 11 This is a schematic diagram of the structure of the expansion block of this utility model;

[0033] Figure 12 This is a schematic diagram of the support ring structure of this utility model;

[0034] Figure 13 This is a structural schematic diagram of the thin-walled part of this utility model;

[0035] Figure 14 This is a schematic diagram of the clamping device for thin-walled parts in Embodiment 5 of this utility model;

[0036] Figure 15 This is a cross-sectional view of the clamping device for thin-walled parts in Embodiment 5 of this utility model.

[0037] Reference numerals: 1. Support assembly; 2. Slider; 3. Expansion block; 4. Ejector rod; 5. Expansion mold column; 6. Support ring; 7. Thin-walled part; 8. Dovetail groove; 9. Dovetail boss; 10. Ejector pin hole; 11. Rotary ejector pin; 12. Central hole; 13. Square hole; 14. First washer ring; 15. Second washer ring; 16. Elastic element; 17. First screw hole; 18. Second screw hole; 19. Third screw hole; 20. Fourth screw hole; 21. Fifth screw hole; 22. Sixth screw hole; 23. Three-jaw chuck; 24. Ejector rod with threaded hole; 25. Expansion mold column with flange fixing hole; 26. Tie rod; 27. Lathe cylinder; 28. Fixing flange; 29. ​​Flange fixing threaded hole; 30. Cylinder connecting device; 31. Pneumatic assembly. Detailed Implementation

[0038] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0039] Example 1

[0040] like Figures 1-13 As shown, this embodiment provides a clamping device for thin-walled parts, including a support assembly 1 and a push rod 4. The support assembly 1 includes a slider 2, which is slidably connected to the push rod 4. The clamping device for thin-walled parts also includes an expanding mold column 5, on which a support ring 6 is installed. The support ring 6 is clearance-fitted with the expanding mold column 5. After the push rod 4 is inserted into the expanding mold column 5, it moves along the axial direction of the expanding mold column 5. The support assembly 1 extends outward to the inner wall of the support ring 6 to clamp the thin-walled part 7.

[0041] The support ring 6 and the expanding mold column 5 are clearance-fitted. The support ring 6 is installed on the stepped surface of the expanding mold column 5, and the inner wall dimensions of the support ring 6 and the thin-walled part 7 are the same. When the expanding mold column 5 is placed along the height direction, the thin-walled part 7 is placed above the support ring 6, and the support ring 6 supports the thin-walled part 7. When the push rod 4 moves axially along the axis of the expanding mold column 5, the push rod 4 and the slider 2 are slidably connected. When the push rod 4 moves, it drives the slider 2 to move outward along the radial direction of the expanding mold column 5, so that the support assembly 1 extends outward to the inner wall of the support ring 6 and supports the thin-walled part 7. Since the distance of the support assembly 1 is limited by the inner wall dimension of the support ring 6, when it is necessary to clamp thin-walled parts 7 of different sizes, it is only necessary to replace the support ring 6 of the corresponding size.

[0042] When installing the clamping device for thin-walled parts, first select the corresponding support ring 6 according to the size of the thin-walled part 7. Then, install the support ring 6 on the stepped surface of the expanding mold column 5. Next, install the support assembly 1 onto the expanding mold column 5. Then, insert the ejector rod 4 into the expanding mold column 5, so that the ejector rod 4 and the slider 2 are slidably connected. After installing the clamping device for thin-walled parts, push the thin-walled part 7 into the clamping device along the axial direction of the expanding mold column 5. When the end face of the thin-walled part 7 abuts against the support ring 6, the support ring 6 supports the thin-walled part 7, preventing the thin-walled part 7 from continuing to move along the axial direction of the expanding mold column 5. At this time, there is a certain gap between the thin-walled part 7 and the support assembly 1. When the expanding mold column 5 is placed along the height direction, by pushing the ejector rod 4, the ejector rod 4 moves downward along the axial direction of the expanding mold column 5. Under the sliding cooperation of the ejector rod 4 and the slider 2, the slider 2 is displaced radially outward along the expanding mold column 5, so that the support assembly 1 is pushed outward to the inner wall of the support ring 6. At this point, the support assembly 1 stops its external support, and the support assembly 1 is interference-fitted with the inner wall of the thin-walled part 7 to clamp the thin-walled part 7 and prevent axial displacement. After the thin-walled part 7 is processed, the push rod 4 is pushed upward along the axial direction of the expansion mold column 5, and the slider 2 is moved radially inward along the expansion mold column 5, causing the support assembly 1 to return to its initial position. At this time, there is a certain gap between the support assembly 1 and the thin-walled part 7, which allows for easy removal of the thin-walled part 7. The above process processes one thin-walled part 7. When processing the next thin-walled part 7, the support ring 6 of the corresponding size can be replaced according to the inner wall size of the thin-walled part 7 before the next processing, thereby realizing batch processing of thin-walled parts 7 and greatly improving production efficiency.

[0043] This embodiment discloses a clamping device for thin-walled parts, including a support assembly 1 and a push rod 4. The support assembly 1 includes a slider 2, which is slidably connected to the push rod 4. The clamping device also includes an expanding mold column 5, on which a support ring 6 is mounted. The support ring 6 is clearance-fitted with the expanding mold column 5. After the push rod 4 is inserted into the expanding mold column 5, it moves along the axial direction of the expanding mold column 5. The support assembly 1 extends outward to the inner wall of the support ring 6 to clamp the thin-walled part 7. First, a suitable support ring 6 is selected to ensure that the inner wall size of the support ring 6 is the same as the inner wall size of the thin-walled part 7 to be processed. The support ring 6 is then installed on the stepped surface of the expanding mold column 5. Next, the thin-walled part 7 is placed into the clamping device along the axial direction of the expanding mold column 5, so that the end face of the thin-walled part 7 abuts against the support ring 6. At this time, the support ring 6 provides support for the thin-walled part 7. The push rod 4 drives the slider 2 to move, causing the support assembly 1 to extend outwards to the inner wall of the support ring 6. At this point, the support assembly 1 stops extending outwards, and it tightly engages with the thin-walled part 7, clamping it and preventing axial displacement. After machining the thin-walled part 7, the push rod 4 is pushed back to its initial position, which then drives the slider 2 to return the support assembly 1 to its initial position. A gap remains between the support assembly 1 and the thin-walled part 7, allowing for easy removal. The inner diameter of the support ring 6 is designed based on the inner wall dimensions of the thin-walled part 7 to prevent excessive outward extension of the support assembly 1, which could cause deformation of the thin-walled part 7. When machining thin-walled parts 7 of different sizes, only the support ring 6 needs to be replaced, enabling rapid switching between different clamping device models for thin-walled parts. This significantly reduces the variety of clamping devices used, lowers production costs, and improves machining efficiency.

[0044] Example 2

[0045] like Figures 1-13 As shown, this embodiment provides a clamping device for thin-walled parts, including a support assembly 1 and a push rod 4. The support assembly 1 includes a slider 2, which is slidably connected to the push rod 4. The clamping device for thin-walled parts also includes an expanding mold column 5, on which a support ring 6 is installed. The support ring 6 is clearance-fitted with the expanding mold column 5. After the push rod 4 is inserted into the expanding mold column 5, it moves along the axial direction of the expanding mold column 5. The support assembly 1 extends outward to the inner wall of the support ring 6 to clamp the thin-walled part 7.

[0046] The slider 2 is provided with a dovetail boss 9, and the top rod 4 is provided with a dovetail groove 8. The dovetail boss 9 and the dovetail groove 8 are slidably connected.

[0047] The slider 2 is connected to the expansion block 3 on the side away from the dovetail boss 9, and one side of the expansion block 3 abuts against the support ring 6 or has a gap.

[0048] The expansion block 3 has a first screw hole 17, and the slider 2 has a second screw hole 18 on the side near the expansion block 3. The first screw hole 17 and the second screw hole 18 are adapted to each other.

[0049] The first end face of the ejector rod 4 is provided with an ejector pin hole 10, and a rotary ejector pin 11 is inserted into the ejector pin hole 10. The rotary ejector pin 11 is used to push the ejector rod 4 to move axially along the axis of the expansion mold column 5.

[0050] The threads on the inner walls of the first screw hole 17 and the second screw hole 18 are adapted to the threads on the outer side of the fixing screw. The first screw hole 17 and the second screw hole 18 are the same size. The first screw hole 17 passes through the expansion block 3, and the second screw hole 18 is located on the side of the slider 2 near the expansion block 3. The first screw hole 17 and the second screw hole 18 are aligned. By screwing the fixing screw into the first screw hole 17 and then into the second screw hole 18, the expansion block 3 and the slider 2 can be connected and fixed. Preferably, there are 3 first screw holes 17 and 3 second screw holes 18. The 3 first screw holes 17 and 3 second screw holes 18 are aligned. After screwing the 3 fixing screws into the 3 first screw holes 17, they are then screwed into the 3 second screw holes 18 aligned with the 3 first screw holes 17, making the connection between the expansion block 3 and the slider 2 more stable and less likely to fall off.

[0051] The dovetail boss 9 on slider 2 and the dovetail groove 8 on ejector pin 4 are slidably connected. When ejector pin 4 is inserted into expansion mold column 5, as ejector pin 4 moves along the axial direction of expansion mold column 5, the dovetail boss 9 on slider 2 slides along the dovetail groove 8 on ejector pin 4, causing slider 2 to drive expansion block 3 to be pushed outward to the inner wall of support ring 6. At this time, expansion block 3 is tightly engaged with thin-walled part 7, and thin-walled part 7 cannot make axial or radial displacement, so that expansion block 3 clamps thin-walled part 7.

[0052] After assembling the clamping device for the thin-walled part, the thin-walled part 7 is first pushed into the clamping device along the axial direction of the expanding mold column 5. At this time, a certain gap is left between the thin-walled part 7 and the expanding block 3, so that the thin-walled part 7 can be easily pushed into the clamping device. When the clamping device for the thin-walled part is placed along the height direction, when the end face of the thin-walled part 7 abuts against the support ring 6, the support ring 6 supports the thin-walled part 7, preventing the thin-walled part 7 from continuing to move downward along the axial direction of the expanding mold column 5. The rotating ejector pin 11 pushes the ejector rod 4 downward along the axial direction of the expanding mold column 5, causing the dovetail groove 8 of the ejector rod 4 to move downward along the axial direction of the expanding mold column 5. Because the dovetail groove 8 of the ejector pin 4 and the dovetail boss 9 of the slider 2 are slidably connected, when the dovetail groove 8 moves downward, it drives the dovetail boss 9 to move radially outward along the radial direction of the expansion mold column 5, thereby driving the expansion block 3 to push outward to the inner wall of the support ring 6. Under the restriction of the inner wall of the support ring 6, the expansion block 3 stops pushing outward, thus preventing the expansion block 3 from pushing outward too much and causing the thin-walled part 7 to deform. At this time, the expansion block 3 and the thin-walled part 7 are tightly fitted, and the contact area between the expansion block 3 and the inner wall of the thin-walled part 7 is large, further ensuring that the thin-walled part 7 does not deform.

[0053] In this embodiment, the slider 2 is provided with a dovetail boss 9, and the ejector rod 4 is provided with a dovetail groove 8. The dovetail boss 9 and the dovetail groove 8 are slidably connected. A swelling block 3 is connected to the side of the slider 2 away from the dovetail boss 9. One side of the swelling block 3 abuts against or has a gap with the support ring 6. A first screw hole 17 is provided on the swelling block 3, and a second screw hole 18 is provided on the side of the slider 2 near the swelling block 3. The first screw hole 17 and the second screw hole 18 are adapted to each other. A ejector pin hole 10 is provided on the first end face of the ejector rod 4. A rotary ejector pin 11 is inserted into the ejector pin hole 10. The rotary ejector pin 11 is used to push the ejector rod 4 to move axially along the axis of the expanding mold column 5. The rotary ejector pin 11 pushes the ejector rod 4 axially along the axis of the expansion mold column 5, causing the dovetail groove 8 of the ejector rod 4 to drive the dovetail boss 9 of the slider 2 to move radially outward along the radial direction of the expansion mold column 5. This allows the slider 2 to push the expansion block 3 outward until it reaches the inner wall of the support ring 6, at which point the outward pushing stops. At this point, the expansion block 3 and the thin-walled part 7 are tightly fitted together, and the contact area between the expansion block 3 and the thin-walled part 7 is large, allowing the expansion block 3 to support the thin-walled part 7, thus enabling the clamping device of the thin-walled part to clamp it. During the above process, the support ring 6, which has the same dimensions as the inner wall of the thin-walled part 7, can be replaced to prevent the support assembly 1 from being too large and causing the thin-walled part 7 to deform. Because the contact area between the expansion block 3 and the thin-walled part 7 is large, when the expansion block 3 and the thin-walled part 7 are tightly fitted together, while ensuring that the thin-walled part 7 does not deform, the expansion block 3 can provide a more stable support force to the thin-walled part 7, thereby achieving a better clamping effect of the clamping device on the thin-walled part 7.

[0054] Example 3

[0055] like Figures 1-13 As shown, this embodiment provides a clamping device for thin-walled parts, including a support assembly 1 and a push rod 4. The support assembly 1 includes a slider 2, which is slidably connected to the push rod 4. The clamping device for thin-walled parts also includes an expanding mold column 5, on which a support ring 6 is installed. The support ring 6 is clearance-fitted with the expanding mold column 5. After the push rod 4 is inserted into the expanding mold column 5, it moves along the axial direction of the expanding mold column 5. The support assembly 1 extends outward to the inner wall of the support ring 6 to clamp the thin-walled part 7.

[0056] The first end face of the ejector rod 4 is provided with an ejector pin hole 10, and a rotary ejector pin 11 is inserted into the ejector pin hole 10. The rotary ejector pin 11 is used to push the ejector rod 4 to move axially along the axis of the expansion mold column 5.

[0057] The end face of the expansion mold column 5 is provided with a central hole 12, which penetrates the expansion mold column 5, and the push rod 4 is inserted into the central hole 12.

[0058] The side of the expansion mold column 5 is provided with a square hole 13, and the support component 1 is installed in the square hole 13.

[0059] An elastic element 16 is placed inside the central hole 12. The first end of the elastic element 16 abuts against the second washer 15, and the second end of the elastic element 16 abuts against the second end face of the top rod 4.

[0060] When using the clamping device for thin-walled parts, first clamp the clamping device for thin-walled parts with a three-jaw chuck 23. The three-jaw chuck 23 includes a base and three grippers. The three grippers are arranged around the circumference of the base. When the three-jaw chuck 23 clamps the clamping device for thin-walled parts, the three grippers clamp the clamping device for thin-walled parts at the same time, so that the clamping device for thin-walled parts is firmly clamped by the three-jaw chuck 23 and will not fall off easily.

[0061] When installing the clamping device for thin-walled parts, firstly, the support ring 6 is installed on the stepped surface of the expanding mold column 5, and then the second washer ring 15 is fixed on the second end face of the expanding mold column 5, so that the second washer ring 15 seals the end of the central hole 12 near the three-jaw chuck 23. Next, the elastic element 16 is placed into the central hole 12 of the expanding mold column 5, and the elastic element 16 automatically slides down to the end of the central hole 12 near the three-jaw chuck 23. At this time, the first end of the elastic element 16 abuts against the second washer ring 15. Then, the support assembly 1 is installed in the square hole 13 on the side of the expanding mold column 5, and then the push rod 4 is inserted into the central hole 12 until the second end face of the push rod 4 abuts against the second end of the elastic element 16. At the same time, the slider 2 of the push rod 4 is slidably connected to the support assembly 1. At this time, the installation of the clamping device for thin-walled parts is completed. In this embodiment, the elastic element 16 is a spring as an example.

[0062] After the clamping device for the thin-walled part is installed, the three-jaw chuck 23 is used to clamp the clamping device. Since the ejector pin 4 is not pushed by the rotary ejector pin 11 at this time, there is still a gap between the thin-walled part 7 and the support assembly 1 of the clamping device. Therefore, the thin-walled part 7 can be pushed into the clamping device along the axial direction of the expansion mold column 5. By controlling the rotary ejector pin 11 to push the ejector pin 4 to move axially along the axial direction of the expansion mold column 5, the second end face of the ejector pin 4 presses the elastic element 16, and the elastic element 16 is in a compressed state at this time. At the same time, during the axial movement of the ejector pin 4, the slider 2 of the ejector pin 4 drives the support assembly 1 to be pushed outward to the inner wall of the support ring 6, so that the support assembly 1 clamps the thin-walled part 7. After the thin-walled part 7 is processed, the rotary ejector pin 11 is controlled to retract, so that the rotary ejector pin 11 no longer pushes the ejector rod 4. During the process of the elastic element 16 returning from the compressed state to the naturally extended state, the elastic element 16 applies a thrust to the ejector rod 4, pushing the ejector rod 4 back to the initial position. The ejector rod 4 drives the support assembly 1 back to the initial position. At this time, there is a certain gap between the support assembly 1 and the thin-walled part 7, and the thin-walled part 7 can be directly removed.

[0063] In this embodiment, the first end face of the ejector rod 4 has an ejector pin hole 10, into which a rotary ejector pin 11 is inserted. The rotary ejector pin 11 is used to push the ejector rod 4 to move axially along the axis of the expanding mold column 5. The end face of the expanding mold column 5 has a central hole 12, which penetrates the expanding mold column 5, and the ejector rod 4 is inserted into the central hole 12. The side of the expanding mold column 5 has a square hole 13, and the support assembly 1 is installed in the square hole 13. An elastic element 16 is placed in the central hole 12. The first end of the elastic element 16 abuts against the second washer ring 15, and the second end of the elastic element 16 abuts against the second end face of the ejector rod 4. The clamping device for the thin-walled part is held by a three-jaw chuck 23. Then, the rotary ejector pin 11 is controlled to push the ejector rod 4 axially along the axis of the expansion mold column 5. While the ejector rod 4 is pressing the elastic element 16, its slider 2 drives the support assembly 1 to extend outwards to the inner wall of the support ring 6, thus clamping the thin-walled part 7. After machining the thin-walled part 7, the rotary ejector pin 11 is retracted, and it no longer applies a pushing force to the ejector rod 4. During the rebound of the elastic element 16, the ejector rod 4 is pushed by the elastic element 16, causing it to return to its initial position. During this return, the slider 2 of the ejector rod 4 drives the support assembly 1 to its initial position, creating a gap between the support assembly 1 and the thin-walled part 7. This allows for easy removal of the thin-walled part 7 before switching to the next thin-walled part 7 for machining. In this process, by controlling the reciprocating motion of the rotary ejector pin 11, the thin-walled part 7 can be quickly switched, achieving automated production and improving processing efficiency.

[0064] Example 4

[0065] like Figures 1-13 As shown, this embodiment provides a clamping device for thin-walled parts, including a support assembly 1 and a push rod 4. The support assembly 1 includes a slider 2, which is slidably connected to the push rod 4. The clamping device for thin-walled parts also includes an expanding mold column 5, on which a support ring 6 is installed. The support ring 6 is clearance-fitted with the expanding mold column 5. After the push rod 4 is inserted into the expanding mold column 5, it moves along the axial direction of the expanding mold column 5. The support assembly 1 extends outward to the inner wall of the support ring 6 to clamp the thin-walled part 7.

[0066] The side of the expansion mold column 5 is provided with a square hole 13, and the support component 1 is installed in the square hole 13.

[0067] The first end face of the expansion mold column 5 is connected to a first washer 14, and the push rod 4 passes through the first washer 14; a third screw hole 19 is provided on the first washer 14, and a fourth screw hole 20 is provided on the first end face of the expansion mold column 5, and the third screw hole 19 and the fourth screw hole 20 are adapted to each other.

[0068] The second end face of the expansion mold column 5 is connected to a second washer 15, the second washer 15 is provided with a fifth screw hole 21, and the second end face of the expansion mold column 5 is provided with a sixth screw hole 22. The fifth screw hole 21 and the sixth screw hole 22 are adapted to each other.

[0069] The end face of the expansion mold column 5 is provided with a central hole 12, which penetrates the expansion mold column 5, and the push rod 4 is inserted into the central hole 12.

[0070] An elastic element 16 is placed inside the central hole 12. The first end of the elastic element 16 abuts against the second washer 15, and the second end of the elastic element 16 abuts against the second end face of the top rod 4.

[0071] Insert the fixing screw into the fifth screw hole 21 on the second washer 15 and the sixth screw hole 22 on the expanding mold column 5 to fix the second washer 15 to the second end face of the expanding mold column 5. Then, install the elastic element 16 to prevent it from falling out. Connect the slider 2 and the expanding block 3 together with the side fixing screw to form the support assembly 1. The side wall of the expanding mold column 5 has three square holes 13, which are spaced apart. Install the three support assemblies 1 into the corresponding square holes 13, and then install the ejector rod 4 into the expanding mold column 5 through the central hole 12. Insert the fastening screw into the third screw hole 19 on the first washer 14 and the fourth screw hole 20 on the expanding mold column 5 to fix the first washer 14 to the first end face of the expanding mold column 5 to prevent the ejector rod 4 from coming out.

[0072] First, the clamping device for the thin-walled part is clamped by the three-jaw chuck 23. Since the ejector rod 4 is not under the action of the rotating ejector pin 11 at this time, there is still a gap between the thin-walled part 7 and the clamping device. Therefore, the thin-walled part 7 can be pushed into the clamping device along the axial direction. Then, the CNC lathe controls the rotating ejector pin 11 to press against the ejector pin hole 10 of the ejector rod 4. Under the action of the rotating ejector pin 11, the ejector rod 4 will be pushed inward, thereby compressing the elastic element 16. The elastic element 16 will deform when compressed, and at this time the elastic element 16 is in a compressed state.

[0073] The support assembly 1, under the action of the push rod 4, extends outward to support the thin-walled part 7, thereby clamping the thin-walled part 7. When the support assembly 1 extends outward to the inner wall of the support ring 6, it stops extending outward to prevent excessive extension from damaging the thin-walled part 7. After the machining of the thin-walled part 7 is completed, the CNC lathe controls the rotary ejector 11 to retract along the axial direction of the push rod 4, the elastic element 16 pushes the push rod 4 out, and both the support assembly 1 and the elastic element 16 retract to their original positions. At this time, the thin-walled part 7 is removed.

[0074] In this embodiment, the first end face of the expanding mold column 5 is connected to a first washer 14, and the ejector rod 4 passes through the first washer 14. A third screw hole 19 is provided on the first washer 14, and a fourth screw hole 20 is provided on the first end face of the expanding mold column 5. The third screw hole 19 and the fourth screw hole 20 are compatible. A fastening screw is inserted into the third screw hole 19 on the first washer 14 and the fourth screw hole 20 on the expanding mold column 5, thereby fixing the first washer 14 to the first end face of the expanding mold column 5 to prevent the ejector rod 4 from dislodging. A second washer 15 is connected to the second end face of the expanding mold column 5. A fifth screw hole 21 is provided on the second washer 15, and a sixth screw hole 22 is provided on the second end face of the expanding mold column 5. The fifth screw hole 21 and the sixth screw hole 22 are compatible. Insert the fixing screw into the fifth screw hole 21 on the second washer 15 and the sixth screw hole 22 on the expansion mold post 5 to fix the second washer 15 to the second end face of the expansion mold post 5. Then, install the elastic member 16 to prevent the elastic member 16 from falling out.

[0075] Example 5

[0076] like Figures 14-15 As shown, this embodiment provides a clamping device for thin-walled parts, including a support assembly 1 and a push rod 4. The support assembly 1 includes a slider 2, which is slidably connected to the push rod 4. The clamping device for thin-walled parts also includes an expanding mold column 5, on which a support ring 6 is installed. The support ring 6 is clearance-fitted with the expanding mold column 5. After the push rod 4 is inserted into the expanding mold column 5, it moves along the axial direction of the expanding mold column 5. The support assembly 1 extends outward to the inner wall of the support ring 6 to clamp the thin-walled part 7.

[0077] The second end face of the expansion mold column 25 with flange fixing hole is provided with flange fixing thread hole 29, and the fixing flange 28 is installed in the flange fixing thread hole 29.

[0078] The clamping device for thin-walled parts also includes a pull rod 26, which is connected to a push rod 24 with a threaded hole. The end of the pull rod 26 away from the push rod 24 with the threaded hole is connected to a pneumatic assembly 31.

[0079] The pneumatic assembly 31 includes a lathe cylinder 27 and a cylinder connecting device 30. The first end of the cylinder connecting device 30 is connected to the pull rod 26, and the second end of the cylinder connecting device 30 is connected to the lathe cylinder 27.

[0080] A pneumatic assembly 31 and a tie rod 26 are installed on a lathe. The pneumatic assembly 31 consists of a lathe cylinder 27 and a cylinder connecting device 30. In this embodiment, the elastic element 16 and the second washer 15 are removed, and a fixing threaded hole is machined on the ejector rod 4 to form an ejector rod 24 with a threaded hole. A flange fixing threaded hole 29 is machined on the expansion mold column 5 to form an expansion mold column 25 with a flange fixing hole. During installation, after assembling the clamping device for the thin-walled part, the tie rod 26 is first connected to the ejector rod 24 with a threaded hole, and then the fixing flange 28 is installed in the flange fixing threaded hole 29 of the expansion mold column 25 with a flange fixing hole, thereby installing the clamping device for the thin-walled part on the lathe.

[0081] The pull rod 26 pulls the push rod 24 with a threaded hole, causing the support assembly 1 to extend outwards. The pull rod 26 pushes the push rod 24 with a threaded hole, causing the support assembly 1 to return to its original position. The lathe cylinder 27 has a magnetic switch and a central sealing valve. The magnetic switch is used to provide feedback on the position of the lathe cylinder 27, and the central sealing valve is used to control the movement of the lathe cylinder 27. The lathe cylinder 27 can control the movement of the pull rod 26 through the magnetic switch and the central sealing valve, thereby realizing the automatic extension and retraction of the clamping device for thin-walled parts. The solution of this embodiment can realize the automatic loading and unloading of thin-walled parts 7, significantly reducing labor costs.

[0082] When batch processing thin-walled parts 7, the reciprocating motion of the rotary center 11 on the tailstock of the CNC lathe can be controlled by the CNC lathe, or the reciprocating motion of the pneumatic assembly 31 can be controlled by the CNC lathe to quickly clamp and disassemble the thin-walled parts 7. When batch processing thin-walled parts 7 of different sizes, only the corresponding support ring 6 needs to be replaced. It is not necessary to remove the entire clamping device of the thin-walled part from the CNC lathe to replace it with a clamping device corresponding to the model of the thin-walled part 7.

[0083] Compared to the clamping devices for thin-walled parts described in any of the embodiments 1-4, the clamping device for thin-walled parts in this embodiment reduces the number of structures. During CNC lathe machining, the clamping device for thin-walled parts in this embodiment is easy to manufacture and install, significantly reducing the types of fixtures required for thin-walled parts 7, providing stable clamping force, improving the clamping efficiency of thin-walled parts 7, and achieving universality of the clamping device for thin-walled parts 7, thus meeting the need for rapid changeover during mass production of thin-walled parts 7.

[0084] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application. Any specific values ​​in all examples shown and discussed herein should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0085] It should be understood that spatial relative terms are intended to encompass different orientations of a device in use or operation, in addition to the orientation described in the figures. For example, if a device in the figures is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0086] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0087] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A clamping device for thin-walled parts, characterized in that, The device includes a support assembly and a push rod. The support assembly includes a slider that is slidably connected to the push rod. The clamping device for the thin-walled part also includes an expanding mold column. A support ring is installed on the stepped surface of the expanding mold column, and the support ring is clearance-fitted with the expanding mold column. After the push rod is inserted into the expanding mold column, it moves along the axial direction of the expanding mold column. The support assembly extends outward to the inner wall of the support ring to clamp the thin-walled part.

2. The clamping device for thin-walled parts according to claim 1, characterized in that, The slider is provided with a dovetail boss, and the top rod is provided with a dovetail groove. The dovetail boss and the dovetail groove are slidably connected.

3. The clamping device for thin-walled parts according to claim 2, characterized in that, The slider is connected to an expansion block on the side away from the dovetail boss, and one side of the expansion block abuts against or has a gap with the support ring.

4. The clamping device for thin-walled parts according to claim 3, characterized in that, The expansion block has a first screw hole, and the slider has a second screw hole on the side near the expansion block. The first screw hole and the second screw hole are adapted to each other.

5. The clamping device for thin-walled parts according to claim 1, characterized in that, The first end face of the ejector rod is provided with an ejector pin hole, and a rotary ejector pin is inserted into the ejector pin hole. The rotary ejector pin is used to push the ejector rod to move axially along the axis of the expansion mold column.

6. The clamping device for thin-walled parts according to claim 1, characterized in that, The end face of the expansion mold column has a central hole that penetrates the expansion mold column, and the ejector rod is inserted into the central hole.

7. The clamping device for thin-walled parts according to claim 1, characterized in that, The expansion mold column has a square hole on its side, and the support component is installed in the square hole.

8. The clamping device for thin-walled parts according to claim 1, characterized in that, The first end face of the expansion mold column is connected to a first washer ring, and the push rod passes through the first washer ring; a third screw hole is provided on the first washer ring, and a fourth screw hole is provided on the first end face of the expansion mold column, and the third screw hole and the fourth screw hole are adapted to each other.

9. The clamping device for thin-walled parts according to claim 6, characterized in that, The second end face of the expansion mold column is connected to a second washer, the second washer is provided with a fifth screw hole, and the second end face of the expansion mold column is provided with a sixth screw hole, the fifth screw hole and the sixth screw hole are adapted to each other.

10. The clamping device for thin-walled parts according to claim 9, characterized in that, An elastic element is placed inside the central hole. The first end of the elastic element abuts against the second washer ring, and the second end of the elastic element abuts against the second end face of the top rod.

11. The clamping device for thin-walled parts according to claim 1, characterized in that, The sidewalls of the expansion mold column are provided with multiple support components.

12. The clamping device for thin-walled parts according to claim 1, characterized in that, The second end face of the expansion mold column with flange fixing hole is provided with flange fixing thread hole, and the fixing flange is installed in the flange fixing thread hole.

13. The clamping device for thin-walled parts according to claim 12, characterized in that, It also includes a pull rod connected to a push rod with a threaded hole, and a pneumatic assembly is connected to one end of the pull rod away from the push rod with the threaded hole.

14. The clamping device for thin-walled parts according to claim 13, characterized in that, The pneumatic assembly includes a lathe cylinder and a cylinder connecting device. The first end of the cylinder connecting device is connected to the pull rod, and the second end of the cylinder connecting device is connected to the lathe cylinder.

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