Clamping device for thin-wall part

Abstract

The clamping device for the thin-wall part comprises a supporting assembly and an ejector rod, the supporting assembly comprises a sliding block, and the sliding block is in sliding connection with the ejector rod. 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] The invention relates to the technical field of thin-walled part clamps, and in particular to a clamping device for thin-walled parts. Background Art

[0002] Since thin-walled parts are prone to deformation, if the clamping force is too large when using existing lathe clamps or fixtures for clamping, it will cause the parts to deform and affect their use. If the clamping force is too small, it will reduce the processing accuracy and affect the use effect.

[0003] The existing technology cannot effectively control the clamping force of the inner support when processing thin-walled parts. Manual clamping easily causes deformation of thin-walled parts, and parts are replaced manually. For example, in one case, the front nut needs to be manually disassembled before replacing the part, which has the problem of slow processing efficiency when large-scale processing is involved.

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

[0005] In order to overcome the problems existing in the related art, an object of the present invention 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, comprising a support assembly and a push rod, the support assembly comprising a slider, the slider being slidably connected to the push rod; the clamping device for thin-walled parts also comprises an expansion mold column, the step surface of the expansion mold column is equipped with a support ring, the support ring and the expansion mold column are clearance-matched; after the push rod is inserted into the expansion mold column, it moves axially along the expansion mold column, and the support assembly is supported outward to the inner wall of the support ring to clamp the thin-walled parts.

[0007] In a preferred technical solution of the present invention, a dovetail boss is provided on the sliding block, a dovetail groove is provided on the push rod, and the dovetail boss and the dovetail groove are slidably connected.

[0008] In a preferred technical solution of the present invention, a side of the sliding block away from the dovetail boss is connected with an expansion block, and one side of the expansion block abuts against the support ring or there is a gap therebetween.

[0009] In a preferred technical solution of the present invention, a first screw hole is formed on the expansion block, and a second screw hole is formed on a side of the sliding block close to the expansion block, and the first screw hole and the second screw hole are adapted to each other.

[0010] In a preferred technical solution of the present invention, a first end surface of the ejector pin is provided with an ejector pin hole, a rotary ejector pin is inserted into the ejector pin hole, and the rotary ejector pin is used to push the ejector pin to perform axial movement along the axial direction of the expansion mold column.

[0011] In a preferred technical solution of the present invention, a middle hole is opened on the end surface of the expansion mold column, the middle hole passes through the expansion mold column, and the ejector rod is inserted into the middle hole.

[0012] In a preferred technical solution of the present invention, a square hole is opened on the side of the expansion mold column, and the support assembly is installed in the square hole.

[0013] In a preferred technical solution of the present invention, the first end face of the expansion mold column is connected to a first gasket, and the push rod passes through the first gasket; a third screw hole is opened on the first gasket, and a fourth screw hole is opened 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.

[0014] In a preferred technical solution of the present invention, the second end face of the expansion mold column is connected with a second gasket, the second gasket is provided with a fifth screw hole, the second end face of the expansion mold column is provided with a sixth screw hole, and the fifth screw hole and the sixth screw hole are adapted to each other.

[0015] In a preferred technical solution of the present invention, an elastic member is placed in the middle hole, a first end of the elastic member abuts against the second gasket ring, and a second end of the elastic member abuts against the second end surface of the push rod.

[0016] In a preferred technical solution of the present invention, a plurality of the support assemblies are circumferentially arranged on the side wall of the expansion mold column.

[0017] In a preferred technical solution of the present invention, a flange fixing threaded hole is provided on the second end surface of the expansion mold column having the flange fixing hole, and a fixing flange is installed in the flange fixing threaded hole.

[0018] In a preferred technical solution of the present invention, the clamping device for thin-walled parts further comprises a pull rod, the pull rod is connected to a push rod with a threaded hole, and one end of the pull rod away from the push rod with the threaded hole is connected to a pneumatic component.

[0019] In a preferred technical solution of the present 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 the present invention are:

[0021] The present invention provides a clamping device for thin-walled parts, including a support assembly and a push rod, wherein the support assembly includes a slider, and the slider is slidably connected to the push rod; the clamping device for thin-walled parts also includes an expansion mold column, and a support ring is installed on the step surface of the expansion mold column, and the support ring is gap-matched with the expansion mold column; after the push rod is inserted into the expansion mold column, it moves along the axial direction of the expansion mold column, and the support assembly is supported to the inner wall of the support ring to clamp the thin-walled parts. 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, and the support ring is installed on the step surface of the expansion mold column, and then the thin-walled part is placed into the clamping device of the thin-walled part along the axial direction of the expansion mold column, so that the end face of the thin-walled part abuts against the support ring, and at this time, the support ring plays a supporting role for the thin-walled part. The slider is driven by the push rod to move, so that the support assembly is supported outward to the inner wall of the support ring. At this time, the support assembly stops supporting outward, and the support assembly cooperates closely with the thin-walled part and clamps the thin-walled part, so that the thin-walled part cannot move axially. After the processing of the thin-walled part is completed, the push rod is pushed back to the initial position, and the push rod drives the slider to move, so that the support assembly is restored to the initial position. At this time, there is a certain gap between the support assembly and the thin-walled part, which can be conveniently removed directly. According to the inner wall size of the thin-walled part, the inner diameter size of the support ring is designed to prevent the support assembly from being too large, causing the thin-walled part to deform. When processing thin-walled parts of different sizes, it is only necessary to replace the support ring, which realizes the rapid switching of the clamping device model of the thin-walled part, greatly reduces the types of clamping devices for thin-walled parts, reduces the production cost of the clamping device for thin-walled parts, and improves the efficiency of processing thin-walled parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a clamping device for thin-walled parts of the present invention;

[0023] Figure 2 It is a schematic structural diagram of the clamping device of the thin-walled parts of the present invention when it is working;

[0024] Figure 3 is an exploded view of a clamping device for thin-walled parts of the present invention;

[0025] Figure 4 is a cross-sectional view of a clamping device for thin-walled parts of the present invention;

[0026] Figure 5 is a top view of a clamping device for thin-walled parts of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the support assembly and the top rod of the present invention;

[0028] Figure 7is a schematic structural diagram of a support assembly of the present invention;

[0029] Figure 8 It is a schematic structural diagram of the ejector rod of the present invention;

[0030] Fig. 9 It is a structural schematic diagram of the expansion mold column of the present invention;

[0031] Fig.10 It is a structural schematic diagram of the slider of the present invention;

[0032] Fig.11 It is a structural schematic diagram of the expansion block of the present invention;

[0033] Fig.12 is a schematic structural diagram of a support ring of the present invention;

[0034] Fig.13 It is a schematic structural diagram of a thin-walled part of the present invention;

[0035] Fig.14 is a schematic structural diagram of a clamping device for thin-walled parts in Example 5 of the present invention;

[0036] Fig.15 It is a cross-sectional view of a clamping device for thin-walled parts in Example 5 of the present invention.

[0037] Figure 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 hole; 11. Rotary ejector; 12. Middle hole; 13. Square hole; 14. First gasket; 15. Second gasket; 16. Elastic member; 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. Pull rod; 27. Lathe cylinder; 28. Fixed flange; 29. ​​Flange fixing threaded hole; 30. Cylinder connecting device; 31. Pneumatic assembly. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0039] Example 1

[0040] like Figure 1-Figure 13As 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, and the slider 2 is slidably connected to the push rod 4; the clamping device for thin-walled parts also includes an expansion mold column 5, and a support ring 6 is installed on the step surface of the expansion mold column 5, and the support ring 6 is clearance-matched with the expansion mold column 5; after the push rod 4 is inserted into the expansion mold column 5, it moves along the axial direction of the expansion mold column 5, and the support assembly 1 is supported to the inner wall of the support ring 6 to clamp the thin-walled part 7.

[0041] The support ring 6 and the expansion mold column 5 are clearance-fitted, and the support ring 6 is installed on the step surface of the expansion mold column 5. The inner wall size of the support ring 6 is the same as the inner wall size of the thin-walled part 7. When the expansion mold column 5 is placed in 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 is pushed to move axially along the axial direction of the expansion 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 expansion mold column 5, so that the support assembly 1 is supported 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 size of the support ring 6, when thin-walled parts 7 of different sizes need to be clamped, 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 step surface of the expansion mold column 5, then install the support assembly 1 on the expansion mold column 5, and then insert the push rod 4 into the expansion mold column 5, so that the push rod 4 and the slider 2 are slidably connected. After the clamping device for thin-walled parts is installed, the thin-walled part 7 is pushed into the clamping device for thin-walled parts along the axial direction of the expansion 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, so that the thin-walled part 7 cannot continue to move along the axial direction of the expansion mold column 5. At this time, there is a certain gap between the thin-walled part 7 and the support assembly 1. When the expansion mold column 5 is placed in the height direction, by pushing the push rod 4, when the push rod 4 moves downward along the axial direction of the expansion mold column 5, under the sliding cooperation of the push rod 4 and the slider 2, the slider 2 moves outward along the radial direction of the expansion mold column 5, so that the support assembly 1 is supported to the inner wall of the support ring 6. At this time, the support assembly 1 stops supporting, and the support assembly 1 and the inner wall of the thin-walled part 7 are interference fit to clamp the thin-walled part 7 and prevent the thin-walled part 7 from axial displacement. After the processing of the thin-walled part 7 is completed, the push rod 4 is pushed to move upward along the axial direction of the expansion mold column 5, and the slider 2 is displaced radially inward along the expansion mold column 5, driving the support assembly 1 to return 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 easily removed. The above process is for processing a 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, and then the next processing can be carried out, thereby realizing batch processing of thin-walled parts 7 and greatly improving production efficiency.

[0043] The present embodiment provides a clamping device for thin-walled parts, comprising a support assembly 1 and a push rod 4, wherein the support assembly 1 comprises a slider 2, wherein the slider 2 is slidably connected to the push rod 4; the clamping device for thin-walled parts further comprises an expansion mold column 5, wherein a support ring 6 is installed on the step surface of the expansion mold column 5, wherein the support ring 6 is in clearance fit with the expansion mold column 5; after the push rod 4 is inserted into the expansion mold column 5 and moves along the axial direction of the expansion mold column 5, the support assembly 1 is supported to the inner wall of the support ring 6 to clamp the thin-walled parts 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 parts 7 to be processed, and the support ring 6 is installed on the step surface of the expansion mold column 5, and then the thin-walled parts 7 are placed into the clamping device for thin-walled parts along the axial direction of the expansion mold column 5, so that the end face of the thin-walled parts 7 abuts against the support ring 6, and at this time, the support ring 6 plays a supporting role for the thin-walled parts 7. The slider 2 is driven by the push rod 4 to move, so that the support assembly 1 is supported outward to the inner wall of the support ring 6. At this time, the support assembly 1 stops supporting outward, and the support assembly 1 is closely matched with the thin-walled part 7, and clamps the thin-walled part 7, so that the thin-walled part 7 cannot be displaced axially. After the processing of the thin-walled part 7 is completed, the push rod 4 is pushed back to the initial position, and the push rod 4 drives the slider 2 to move, so that the support assembly 1 is restored 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 easily removed directly. According to the inner wall size of the thin-walled part 7, the inner diameter size of the support ring 6 is designed to prevent the support assembly 1 from being too large, causing the thin-walled part 7 to deform. When processing thin-walled parts 7 of different sizes, it is only necessary to replace the support ring 6, which realizes the rapid switching of the clamping device model of the thin-walled part, greatly reduces the types of clamping devices for thin-walled parts, reduces production costs, and improves processing efficiency.

[0044] Example 2

[0045] like Figure 1-Figure 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, and the slider 2 is slidably connected to the push rod 4; the clamping device for thin-walled parts also includes an expansion mold column 5, and a support ring 6 is installed on the step surface of the expansion mold column 5, and the support ring 6 is clearance-matched with the expansion mold column 5; after the push rod 4 is inserted into the expansion mold column 5, it moves along the axial direction of the expansion mold column 5, and the support assembly 1 is supported to the inner wall of the support ring 6 to clamp the thin-walled part 7.

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

[0047] A side of the sliding block 2 away from the dovetail boss 9 is connected with an expansion block 3 , and one side of the expansion block 3 is in contact with the support ring 6 or there is a gap therebetween.

[0048] The expansion block 3 is provided with a first screw hole 17 , and the sliding block 2 is provided with a second screw hole 18 on a side close to the expansion block 3 . The first screw hole 17 and the second screw hole 18 are adapted to each other.

[0049] An ejector pin hole 10 is formed on the first end surface of the ejector pin 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 pin 4 to move axially along the axial direction 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 have the same size. The first screw hole 17 passes through the expansion block 3, and the second screw hole 18 is provided on the side of the slider 2 close to the expansion block 3. The first screw hole 17 and the second screw hole 18 are aligned. After the fixing screw is screwed 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 three first screw holes 17 and three second screw holes 18. The three first screw holes 17 are aligned with the three second screw holes 18. After the three fixing screws are screwed into the three first screw holes 17, they are screwed into the three second screw holes 18 aligned with the three first screw holes 17, so that the connection between the expansion block 3 and the slider 2 is more stable and not easy to fall off.

[0051] The dovetail boss 9 on the slider 2 is slidably connected with the dovetail groove 8 on the push rod 4. After the push rod 4 is inserted into the expansion mold column 5, the push rod 4 moves along the axial direction of the expansion mold column 5, and the dovetail boss 9 on the slider 2 slides along the dovetail groove 8 on the push rod 4, so that the slider 2 drives the expansion block 3 to support the inner wall of the support ring 6. At this time, the expansion block 3 is tightly matched with the thin-walled part 7, and the thin-walled part 7 cannot be displaced axially and radially, so that the expansion block 3 clamps the thin-walled part 7.

[0052] After completing the assembly of the clamping device for the thin-walled part, first push the thin-walled part 7 into the clamping device for the thin-walled part along the axial direction of the expansion mold column 5. At this time, there is a certain gap between the thin-walled part 7 and the expansion block 3, so that the thin-walled part 7 can be easily pushed into the clamping device for the thin-walled part. When the clamping device for the thin-walled part is placed in 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, so that the thin-walled part 7 cannot continue to move downward along the axial direction of the expansion mold column 5. The ejector pin 4 is pushed to move downward along the axial direction of the expansion mold column 5 by the rotary ejector pin 11, driving the dovetail groove 8 of the ejector pin 4 to move downward along the axial direction of the expansion mold column 5. Since the dovetail groove 8 of the push rod 4 and the dovetail boss 9 of the slider 2 are slidably connected, the dovetail groove 8 moves downward to drive the dovetail boss 9 to move radially outward along the radial direction of the expansion mold column 5, so as to drive the expansion block 3 to support 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 supporting the outside, thereby preventing the expansion block 3 from supporting too much and causing the thin-walled part 7 to deform. At this time, the expansion block 3 is closely matched with the thin-walled part 7, and the contact area between the expansion block 3 and the inner wall of the thin-walled part 7 is large, which further ensures 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 push rod 4 is provided with a dovetail groove 8, and the dovetail boss 9 and the dovetail groove 8 are slidably connected. The side of the slider 2 away from the dovetail boss 9 is connected to the expansion block 3, and one side of the expansion block 3 is in contact with the support ring 6 or there is a gap. The expansion block 3 is provided with a first screw hole 17, and the side of the slider 2 close to the expansion block 3 is provided with a second screw hole 18, and the first screw hole 17 and the second screw hole 18 are adapted. The first end surface of the push rod 4 is provided with an ejector pin hole 10, and a rotary ejector pin 11 is inserted into the ejector pin hole 10, and the rotary ejector pin 11 is used to push the ejector pin 4 to move axially along the axial direction of the expansion mold column 5. The ejector pin 4 is pushed to move axially along the axial direction of the expansion mold column 5 by the rotating ejector pin 11, so that the dovetail groove 8 of the ejector pin 4 drives the dovetail boss 9 of the slider 2 to move radially outward along the radial direction of the expansion mold column 5, so that the slider 2 drives the expansion block 3 to support the inner wall of the support ring 6 and then stops supporting. At this time, the expansion block 3 is tightly matched with the thin-walled part 7, and the contact area between the expansion block 3 and the thin-walled part 7 is large, so that the expansion block 3 supports the thin-walled part 7, so that the clamping device of the thin-walled part clamps the thin-walled part 7. In the above process, the support ring 6 with the same size as the inner wall of the thin-walled part 7 can be replaced to prevent the support assembly 1 from deforming due to excessive external support. Due to the large contact area between the expansion block 3 and the thin-walled part 7, when the expansion block 3 is tightly matched with the thin-walled part 7, while ensuring that the thin-walled part 7 does not deform, the expansion block 3 can provide a more stable supporting force to the thin-walled part 7, thereby achieving a better clamping effect of the clamping device of the thin-walled part on the thin-walled part 7.

[0054] Example 3

[0055] like Figure 1-Figure 13 As shown, this embodiment provides a clamping device for thin-walled parts, a support assembly 1 and a push rod 4, the support assembly 1 includes a slider 2, and the slider 2 is slidably connected to the push rod 4; the clamping device for thin-walled parts also includes an expansion mold column 5, and a support ring 6 is installed on the step surface of the expansion mold column 5, and the support ring 6 is clearance-matched with the expansion mold column 5; after the push rod 4 is inserted into the expansion mold column 5, it moves along the axial direction of the expansion mold column 5, and the support assembly 1 is supported to the inner wall of the support ring 6 to clamp the thin-walled part 7.

[0056] An ejector pin hole 10 is formed on the first end surface of the ejector pin 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 pin 4 to move axially along the axial direction of the expansion mold column 5 .

[0057] A central hole 12 is formed on the end surface of the expansion mold column 5 . The central hole 12 passes through the expansion mold column 5 , and the ejector rod 4 is inserted into the central hole 12 .

[0058] A square hole 13 is formed on the side of the expansion mold column 5 , and the support assembly 1 is installed in the square hole 13 .

[0059] An elastic member 16 is placed in the middle hole 12 , a first end of the elastic member 16 abuts against the second gasket 15 , and a second end of the elastic member 16 abuts against the second end surface of the push rod 4 .

[0060] When using the clamping device for thin-walled parts, first use the three-jaw chuck 23 to clamp the clamping device for thin-walled parts. The three-jaw chuck 23 includes a chassis and grab clamps. The three grab clamps are arranged along the circumference of the chassis. When the three-jaw chuck 23 clamps the clamping device for thin-walled parts, the three grab clamps 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, first install the support ring 6 on the step surface of the expansion mold column 5, and then fix the second gasket 15 on the second end surface of the expansion mold column 5, so that the second gasket 15 seals the end of the middle hole 12 close to the three-jaw chuck 23. Then put the elastic member 16 into the middle hole 12 of the expansion mold column 5, and the elastic member 16 automatically slides to the end of the middle hole 12 close to the three-jaw chuck 23, at which time the first end of the elastic member 16 abuts against the second gasket 15. Then install the support assembly 1 in the square hole 13 on the side of the expansion mold column 5, and then insert the push rod 4 into the middle hole 12 until the second end surface of the push rod 4 abuts against the second end of the elastic member 16, and at the same time make the slider 2 of the push rod 4 and the support assembly 1 slide-fit connection, at this time the installation of the clamping device for thin-walled parts is completed, and this embodiment takes the elastic member 16 as a spring as an example.

[0062] After the clamping device for thin-walled parts is installed, the three-jaw chuck 23 is first used to clamp the clamping device for thin-walled parts. 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 for thin-walled parts, so the thin-walled part 7 can be pushed into the clamping device for thin-walled parts along the axial direction of the expansion mold column 5. The ejector pin 4 is pushed to move axially along the axial direction of the expansion mold column 5 by controlling the rotary ejector pin 11. The second end face of the ejector pin 4 squeezes the elastic member 16, and the elastic member 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 support the inner wall of the support ring 6, so that the support assembly 1 clamps the thin-walled part 7. After completing the processing of the thin-walled part 7, the rotary ejector 11 is controlled to withdraw so that the rotary ejector 11 no longer pushes the ejector rod 4. During the process of the elastic member 16 recovering from the compressed state to the naturally extended state, the elastic member 16 applies a thrust to the ejector rod 4, pushing the ejector rod 4 to return to the initial position. The ejector rod 4 drives the support assembly 1 to return 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 pin 4 is provided with an ejector pin hole 10, into which a rotary ejector pin 11 is inserted, and the rotary ejector pin 11 is used to push the ejector pin 4 to move axially along the axial direction of the expansion mold column 5. The end face of the expansion mold column 5 is provided with a center hole 12, and the center hole 12 penetrates the expansion mold column 5, and the ejector pin 4 is inserted into the center hole 12. The side of the expansion mold column 5 is provided with a square hole 13, and the support assembly 1 is installed in the square hole 13. An elastic member 16 is placed in the center hole 12, and the first end of the elastic member 16 abuts against the second gasket 15, and the second end of the elastic member 16 abuts against the second end face of the ejector pin 4. The clamping device of the thin-walled part is clamped by the three-jaw chuck 23, and then the ejector pin 4 is pushed to move axially along the axial direction of the expansion mold column 5 by controlling the rotary ejector pin 11. While the ejector pin 4 squeezes the elastic part 16, the slider 2 of the ejector pin 4 drives the support assembly 1 to support the inner wall of the support ring 6, so that the support assembly 1 clamps the thin-walled part 7. After the processing of the thin-walled part 7 is completed, the rotary ejector pin 11 is controlled to withdraw, and the rotary ejector pin 11 no longer applies thrust to the ejector pin 4. The ejector pin 4 is pushed by the elastic part 16 during the rebound process of the elastic part 16, so that the ejector pin 4 returns to its initial position. In the process of the ejector pin 4 returning to its initial position, the slider 2 of the ejector pin 4 drives the support assembly 1 to return to its initial position, so that there is a certain gap between the support assembly 1 and the thin-walled part 7, which is convenient for directly removing the thin-walled part 7 and then switching to the next thin-walled part 7 for processing. In the above process, by controlling the reciprocating motion of the rotary ejector pin 11, the thin-walled part 7 can be quickly switched, automatic production can be realized, and processing efficiency can be improved.

[0064] Example 4

[0065] like Figure 1-Figure 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, and the slider 2 is slidably connected to the push rod 4; the clamping device for thin-walled parts also includes an expansion mold column 5, and a support ring 6 is installed on the step surface of the expansion mold column 5, and the support ring 6 is clearance-matched with the expansion mold column 5; after the push rod 4 is inserted into the expansion mold column 5, it moves along the axial direction of the expansion mold column 5, and the support assembly 1 is supported to the inner wall of the support ring 6 to clamp the thin-walled part 7.

[0066] A square hole 13 is formed on the side of the expansion mold column 5 , and the support assembly 1 is installed in the square hole 13 .

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

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

[0069] A central hole 12 is formed on the end surface of the expansion mold column 5 . The central hole 12 passes through the expansion mold column 5 , and the ejector rod 4 is inserted into the central hole 12 .

[0070] An elastic member 16 is placed in the middle hole 12 , a first end of the elastic member 16 abuts against the second gasket 15 , and a second end of the elastic member 16 abuts against the second end surface of the push rod 4 .

[0071] Insert the fixing screw into the fifth screw hole 21 on the second gasket 15 and the sixth screw hole 22 of the expansion mold column 5, so as to fix the second gasket 15 to the second end face of the expansion mold column 5, and then install the elastic member 16 to prevent the elastic member 16 from falling out. Connect the slider 2 and the expansion block 3 together through the side fixing screws to form a support assembly 1. The side wall of the expansion mold column 5 is provided with three square holes 13, and the three square holes 13 are arranged at intervals. Install the three support assemblies 1 into the corresponding square holes 13 respectively, and then install the push rod 4 into the expansion mold column 5 through the middle hole 12. Insert the fastening screw into the third screw hole 19 on the first gasket 14 and the fourth screw hole 20 of the expansion mold column 5, so as to fix the first gasket 14 to the first end face of the expansion mold column 5 to prevent the push rod 4 from falling out.

[0072] First, the three-jaw chuck 23 is used to clamp the clamping device of the thin-walled part. Since the ejector pin 4 is not affected by the rotary ejector pin 11 at this time, there is still a gap between the thin-walled part 7 and the clamping device of the thin-walled part. Therefore, the thin-walled part 7 can be pushed into the clamping device of the thin-walled part along the axial direction. Then, the CNC lathe controls the rotary ejector pin 11 to push against the ejector pin hole 10 of the ejector pin 4. The ejector pin 4 is pushed inward under the action of the rotary ejector pin 11, thereby squeezing the elastic member 16. The elastic member 16 will be deformed when squeezed, and the elastic member 16 is in a compressed state at this time.

[0073] The support assembly 1 is supported by the ejector pin 4 to hold the thin-walled part 7. When the support assembly 1 reaches the inner wall of the support ring 6, the support will stop, thereby preventing the thin-walled part 7 from being damaged due to excessive support. After the processing of the thin-walled part 7 is completed, the CNC lathe controls the rotary ejector pin 11 to withdraw along the axial direction of the ejector pin 4, the elastic member 16 ejects the ejector pin 4, and the support assembly 1 and the elastic member 16 retract to their original positions, and the thin-walled part 7 is removed.

[0074] In this embodiment, the first end face of the expansion mold column 5 is connected to a first gasket 14, and the push rod 4 passes through the first gasket 14; the first gasket 14 is provided with a third screw hole 19, and the first end face of the expansion mold column 5 is provided with a fourth screw hole 20, and the third screw hole 19 and the fourth screw hole 20 are adapted. Insert the fastening screw into the third screw hole 19 on the first gasket 14 and the fourth screw hole 20 of the expansion mold column 5, so as to fix the first gasket 14 to the first end face of the expansion mold column 5 to prevent the push rod 4 from falling out. The second end face of the expansion mold column 5 is connected to a second gasket 15, and the second gasket 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, and the fifth screw hole 21 and the sixth screw hole 22 are adapted. Insert the fixing screw into the fifth screw hole 21 on the second gasket 15 and the sixth screw hole 22 of the expansion mold column 5 to fix the second gasket 15 to the second end surface of the expansion mold column 5, and then install the elastic member 16 to prevent the elastic member 16 from falling out.

[0075] Example 5

[0076] like Figure 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, and the slider 2 is slidably connected to the push rod 4; the clamping device for thin-walled parts also includes an expansion mold column 5, and a support ring 6 is installed on the step surface of the expansion mold column 5, and the support ring 6 is clearance-matched with the expansion mold column 5; after the push rod 4 is inserted into the expansion mold column 5, it moves along the axial direction of the expansion mold column 5, and the support assembly 1 is supported to the inner wall of the support ring 6 to clamp the thin-walled part 7.

[0077] A flange fixing threaded hole 29 is formed on the second end surface of the expansion mold column 25 having a flange fixing hole, and a fixing flange plate 28 is installed in the flange fixing threaded hole 29 .

[0078] The clamping device for thin-walled parts further comprises a pull rod 26 , wherein the pull rod 26 is connected to a push rod 24 with a threaded hole, and an end of the pull rod 26 away from the push rod 24 with a threaded hole is connected to a pneumatic component 31 .

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

[0080] The pneumatic assembly 31 and the pull rod 26 are installed on the lathe. The pneumatic assembly 31 is composed of a lathe cylinder 27 and a cylinder connecting device 30. In this embodiment, the elastic member 16 and the second gasket 15 are removed, and a fixing threaded hole is processed on the push rod 4 to form a push rod 24 with a threaded hole. The flange fixing threaded hole 29 is processed on the expansion mold column 5 to form an expansion mold column 25 with a flange fixing hole. During installation, after the clamping device for the thin-walled part is assembled, the pull rod 26 is first connected to the push 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, so that the clamping device for the thin-walled part is installed on the lathe.

[0081] The pull rod 26 pulls the push rod 24 with threaded holes to support the support assembly 1. The pull rod 26 pushes the push rod 24 with threaded holes to restore the support assembly 1 to its original position. The lathe cylinder 27 has a magnetic switch and a center sealing valve. The magnetic switch is used to feedback the position of the lathe cylinder 27, and the center 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 center sealing valve, thereby realizing the automatic support and retraction of the clamping device of the thin-walled parts. The solution of this embodiment can realize the automatic loading and unloading of thin-walled parts 7, greatly reducing labor costs.

[0082] When thin-walled parts 7 are processed in batches, the thin-walled parts 7 can be quickly clamped and disassembled by controlling the reciprocating motion of the rotary ejector 11 on the tailstock of the lathe through the CNC lathe, or by controlling the reciprocating motion of the pneumatic assembly 31 through the CNC lathe. When thin-walled parts 7 of different sizes are processed in batches, only the corresponding support ring 6 needs to be replaced, and the entire thin-walled part clamping device does not need to be removed from the CNC lathe, and the thin-walled part clamping device of the model corresponding to the thin-walled part 7 can be replaced.

[0083] The clamping device for thin-walled parts of this embodiment reduces the number of structures compared to the clamping device for thin-walled parts described in any of the embodiments 1 to 4. When processed by a CNC lathe, the clamping device for thin-walled parts of this embodiment is easy to manufacture and install, can greatly reduce the types of fixtures for thin-walled parts 7, and provide a stable clamping force, improve the clamping efficiency of thin-walled parts 7, and realize the generalization of the clamping device for thin-walled parts 7, meeting the need for rapid switching during mass production of thin-walled parts 7.

[0084] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a restriction. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in the subsequent accompanying drawings.

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

[0086] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A clamping device for thin-walled parts, characterized in that: It includes a support component and a push rod, the support component includes a slider, and the slider is slidably connected to the push rod; the clamping device for the thin-walled part also includes an expansion mold column, and a support ring is installed on the step surface of the expansion mold column, and the support ring is gap-matched with the expansion mold column; after the push rod is inserted into the expansion mold column, it moves along the axial direction of the expansion mold column, and the support component is supported 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 sliding block is provided with a dovetail boss, the push rod is provided with a dovetail groove, and 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: A swelling block is connected to a side of the sliding block away from the dovetail boss, and one side of the swelling block abuts against the supporting ring or there is a gap therebetween.

4. The clamping device for thin-walled parts according to claim 3, characterized in that: The expansion block is provided with a first screw hole, and the sliding block is provided with a second screw hole on a side close to the expansion block, and 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: An ejector pin hole is formed on the first end surface of the ejector pin, a rotary ejector pin is inserted into the ejector pin hole, and the rotary ejector pin is used to push the ejector pin to move axially along the axial direction of the expansion mold column.

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

7. The clamping device for thin-walled parts according to claim 1, wherein a square hole is provided on the side of the expansion mold column, and the support assembly is installed in the square hole.

8. The clamping device for thin-walled parts according to claim 1, characterized in that: The first end surface of the expansion mold column is connected with a first gasket, and the push rod passes through the first gasket; the first gasket is provided with a third screw hole, and the first end surface of the expansion mold column is provided with a fourth screw hole, 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 surface of the expansion mold column is connected with a second gasket, and the second gasket is provided with a fifth screw hole. The second end surface of the expansion mold column is provided with a sixth screw hole, and 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 member is placed in the middle hole, a first end of the elastic member abuts against the second gasket ring, and a second end of the elastic member abuts against the second end surface of the push rod.

11. The clamping device for thin-walled parts according to claim 1, characterized in that: A plurality of the support assemblies are circumferentially arranged on the side wall of the expansion mold column.

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

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

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

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