An anti-retraction clamp

Abstract

The utility model discloses an anti-retraction clamp, including a clamping assembly and a plurality of ejector mechanisms, the clamping assembly is provided with a receiving groove, the bottom of the receiving groove is provided with spaced and evenly distributed interpenetrating holes, the receiving groove is used to receive a workpiece; a plurality of ejector mechanisms, each ejector mechanism is respectively arranged in each interpenetrating hole, the ejector mechanism includes an ejector pin and an elastic member, the ejector pin protrudes from the interpenetrating hole near the receiving groove, the elastic member has a first end and a second end arranged oppositely, the first end is connected to the ejector pin, the second end is connected to the clamping assembly, and the elastic member is used to provide elastic force to make the ejector pin protrude from the interpenetrating hole. The utility model can effectively prevent excessive local stress on the workpiece, thereby reducing deformation of the workpiece and further improving the production yield of the workpiece.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to an anti-retraction clamp. Background Art

[0002] In the turning and milling process, when machining the axial end face of the workpiece, in addition to limiting the radial side of the workpiece, the other axial end face of the workpiece also needs to be limited to prevent the workpiece from retreating during the machining process. However, for some sheet workpieces, due to their thin axial thickness, when the machining equipment machines the end face of the sheet workpiece, the local stress in the machining area of ​​the sheet workpiece will increase, making the overall stress of the sheet workpiece unbalanced, resulting in deformation, and then causing poor machining quality of the sheet workpiece. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an anti-retraction clamp, which can reduce the deformation of a sheet-like workpiece under the action of cutting force, thereby improving the processing yield of the workpiece.

[0004] According to an embodiment of the utility model, an anti-retraction clamp includes a clamping assembly and a plurality of push rod mechanisms, the clamping assembly is provided with a receiving groove, the bottom of the receiving groove is provided with spaced and evenly distributed through holes, the receiving groove is used to receive the workpiece; a plurality of push rod mechanisms, each of which is respectively arranged in each through hole, the push rod mechanism includes a push pin and an elastic member, the push pin protrudes out of the through hole near the receiving groove, the elastic member has a first end and a second end arranged oppositely, the first end is connected to the push pin, and the second end is connected to the clamping assembly, the elastic member is used to provide elastic force to make the push pin protrude from the through hole.

[0005] According to an anti-retraction clamp of the embodiment of the utility model, at least the following technical effects are achieved: in the anti-retraction clamp of the present application, since the clamping assembly is provided with a receiving groove, the bottom of the receiving groove is provided with interlaced holes that are spaced and evenly distributed, and the part of the ejector near the receiving groove extends out of the interlaced hole, so when the workpiece is clamped by the clamping assembly in the receiving groove, the end face of the workpiece near the bottom of the receiving groove contacts the ejector; since the anti-retraction clamp includes a plurality of evenly spaced ejector rod mechanisms, the ejector rod mechanism includes an ejector pin and an elastic member, the ejector pin near the receiving groove extends out of the interlaced hole, and the first end of the elastic member is connected to the ejector pin, when the workpiece is processed, the local stress of the processing area of ​​the workpiece increases, and the ejector pin corresponding to the processing area applies an elastic force to the processing area of ​​the workpiece under the action of the elastic member abutting one end thereof, thereby balancing the overall stress of the workpiece, reducing the deformation of the workpiece, and further improving the processing yield of the workpiece. Therefore, it can be known that the above anti-retraction clamp can effectively prevent the local stress of the workpiece from being too large, thereby reducing the deformation of the workpiece, and further improving the production yield of the workpiece.

[0006] According to an anti-retraction clamp of some embodiments of the utility model, a first limiting structure is provided on the inner circumference of the insertion hole, and a first abutting portion is provided on the outer circumference of the ejector pin, and the first abutting portion is used to abut against the first limiting structure to limit the height of the ejector pin protruding from the bottom of the accommodating groove.

[0007] According to some embodiments of the utility model, an anti-retraction clamp is provided, and the insertion hole includes a first insertion section and a second insertion section, the first insertion section is arranged on a side of the second insertion section away from the accommodating groove, the cross-sectional dimension of the first insertion section is larger than the cross-sectional dimension of the second insertion section, and the edge of one end of the second insertion section close to the first insertion section forms a first limiting structure, and the top pin is respectively provided with a first insertion part and a second insertion part corresponding to the first insertion section and the second insertion section, the cross-sectional dimension of the first insertion part is larger than the cross-sectional dimension of the second insertion part, and the end face of the first insertion part close to the second insertion part forms a first abutting part.

[0008] According to some embodiments of the utility model, an anti-retraction clamp comprises a clamping assembly including a sleeve and an axis core, the sleeve is provided with a mounting through hole, the axis core is arranged in the mounting through hole, one end of the axis core and the hole wall of the mounting through hole define a receiving groove, and the axis core is provided with a plurality of through holes passing through both ends thereof.

[0009] According to an anti-retraction clamp of some embodiments of the utility model, the sleeve includes a mounting portion and a plurality of deformation portions, the plurality of deformation portions are all arranged at the same end of the mounting portion and are circumferentially spaced around the axis of the mounting portion, and the deformation portions can clamp the outer peripheral surface of the workpiece under the action of their own elastic force.

[0010] According to an anti-retraction clamp of some embodiments of the utility model, a second limiting structure is provided on the inner circumference of the mounting through hole, and a second abutment portion is provided on the outer circumference of the shaft core, and the second abutment portion is used to abut against the second limiting structure to limit the movement of the shaft core toward the accommodating groove.

[0011] According to an anti-retraction clamp of some embodiments of the utility model, the clamping assembly also includes an adjustment structure, the adjustment structure is arranged on the shaft core, the adjustment structure is connected to the second end, and is used to adjust the position of the second end of the elastic member in the insertion hole.

[0012] According to an anti-retraction clamp of some embodiments of the utility model, the adjustment structure includes a plurality of set screws, the set screws are threadedly connected to the shaft core, and one end of the set screw close to the accommodating groove abuts against the elastic member.

[0013] According to some embodiments of the utility model, an anti-retraction clamp also includes a head, which is connected to the sleeve and abuts against an end of the shaft core away from the accommodating groove.

[0014] According to an anti-retraction clamp of some embodiments of the utility model, a material discharge through hole connected to the accommodating groove is provided in the shaft core, and the material discharge through hole allows a push rod to pass through and extend into the accommodating groove, and push out the workpiece in the accommodating groove to realize material discharge.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic structural diagram of an anti-retraction clamp according to one embodiment of the utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the jacket;

[0019] Figure 3 for Figure 1 A partial enlarged view of the

[0020] Figure 4 for Figure 1 A schematic diagram of the structure of the shaft core;

[0021] Figure 5 for Figure 2 Schematic diagram of the structure of the jacket.

[0022] Reference numerals:

[0023] Clamping assembly 100, accommodating groove 110, insertion hole 120, first insertion section 121, second insertion section 122, first limiting structure 130, jacket 140, mounting through hole 141, first mounting section 141a, second mounting section 141b, mounting portion 142, deformation portion 143, second limiting structure 144, shaft core 150, second abutment portion 151, blanking through hole 152, first section 153, second section 154, adjustment structure 160, set screw 161, anti-loosening screw 170;

[0024] The ejector mechanism 200, the ejector pin 210, the first abutting portion 211, the first insertion portion 212, the second insertion portion 213, and the elastic member 220;

[0025] The sealing head 300 and the avoidance through hole 310 . DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, left, right, front, back, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] Reference below Figures 1 to 5 An anti-retraction clamp according to an embodiment of the utility model is described in detail.

[0031] refer to Figures 1 to 4 According to some embodiments of the utility model, an anti-retraction clamp includes a clamping assembly 100 and a plurality of push rod mechanisms 200. The clamping assembly 100 is provided with a receiving groove 110. The bottom of the receiving groove 110 is provided with spaced and evenly distributed through holes 120. The receiving groove 110 is used to accommodate a workpiece; a plurality of push rod mechanisms 200, each of which is respectively arranged in each through hole 120. The push rod mechanism 200 includes a push pin 210 and an elastic member 220. The push pin 210 partially extends out of the through hole 120 near the receiving groove 110. The elastic member 220 has a first end and a second end that are relatively arranged. The first end is connected to the push pin 210, and the second end is connected to the clamping assembly 100. The elastic member 220 is used to provide an elastic force to make the push pin 210 extend out of the through hole 120.

[0032] For example, Figure 1As shown, in one embodiment, a clamping assembly 100 and four spaced and evenly distributed push rod mechanisms 200 are included. The clamping assembly 100 is provided with a receiving groove 110 for accommodating a workpiece. The groove wall surface of the receiving groove 110 abuts against the radial end surface of the workpiece, so that the clamping assembly 100 can clamp the workpiece. The bottom of the receiving groove 110 is provided with four spaced and evenly distributed through holes 120, each through hole 120 is respectively provided with a push rod mechanism 200, and each push rod mechanism 200 protrudes from the through hole 120 near the receiving groove 110, so that The ejector mechanism 200 can abut against the end face of the workpiece near the bottom of the receiving groove 110; wherein, the ejector mechanism 200 includes an ejector pin 210 and an elastic member 220, the ejector pin 210 partially protrudes from the insertion hole 120 near the receiving groove 110, the elastic member 220 includes a compression spring, one end of the elastic member 220 near the receiving groove 110 abuts against the ejector pin 210, and the end of the elastic member 220 away from the receiving groove 110 abuts against the clamping assembly 100, and when the elastic member 220 is compressed, it can provide an elastic force to make the ejector pin 210 extend out of the insertion hole 120.

[0033] It can be understood that when the workpiece is clamped in the receiving groove 110 by the clamping assembly 100, the end face of the workpiece close to the bottom of the receiving groove 110 abuts against the portion of the ejector pin 210 extending out of the insertion hole 120. When the end face of the workpiece away from the receiving groove 110 is processed, the local stress in the processing area of ​​the workpiece increases. The ejector pin 210 corresponding to the processing area applies an elastic force to the processing area of ​​the workpiece under the action of the compression spring abutting one end thereof, thereby balancing the overall stress of the workpiece, reducing the deformation of the workpiece, and further improving the processing yield of the workpiece.

[0034] It is understandable that, in addition to the compression spring in this embodiment, the elastic member 220 may also be a tension spring or other elastic element capable of providing elastic force to the ejector pin 210 in some other embodiments.

[0035] It is understandable that, in addition to the four in the present embodiment, the number of the push rod mechanisms 200 can also be adjusted according to actual needs and is not limited to four.

[0036] In some embodiments of the present invention, the inner circumference of the insertion hole 120 is provided with a first limiting structure 130, and the outer circumference of the ejector pin 210 is provided with a first abutting portion 211, and the first abutting portion 211 is used to abut against the first limiting structure 130 to limit the height of the ejector pin 210 protruding from the bottom of the receiving groove 110. Figures 1 to 4As shown, the insertion hole 120 includes a first insertion section 121 and a second insertion section 122, the first insertion section 121 is arranged on a side of the second insertion section 122 away from the accommodating groove 110, the cross-sectional dimension of the first insertion section 121 is greater than the cross-sectional dimension of the second insertion section 122, and the edge of the second insertion section 122 close to one end of the first insertion section 121 forms a first limiting structure 130, and the ejector 210 is respectively provided with a first insertion portion 212 and a second insertion portion 213 corresponding to the first insertion section 121 and the second insertion section 122, the cross-sectional dimension of the first insertion portion 212 is greater than the cross-sectional dimension of the second insertion portion 213, and the end surface of the first insertion portion 212 close to the second insertion portion 213 forms a first abutting portion 211; wherein, the cross-sectional dimension of the first insertion section 121 is greater than the cross-sectional dimension of the ejector 210, and the cross-sectional dimension of the second insertion section 122 is smaller than the cross-sectional dimension of the first insertion portion 212, and greater than the cross-sectional dimension of the second insertion portion 213.

[0037] It can be understood that when the ejector pin 210 moves toward the receiving groove 110 under the elastic force provided by the elastic member 220, the ejector pin 210 moves toward the receiving groove 110 under the elastic force provided by the elastic member 220, and when the first abutting portion 211 abuts against the first limiting structure 130, the first limiting structure 130 can hinder the ejector pin 210 from moving toward the receiving groove 110, thereby limiting the height of the ejector pin 210 protruding from the bottom of the receiving groove 110.

[0038] In one embodiment, the clamping assembly 100 includes a jacket 140 and a shaft core 150. The jacket 140 is provided with a mounting through hole 141. The shaft core 150 is disposed in the mounting through hole 141. One end of the shaft core 150 and the hole wall of the mounting through hole 141 define a receiving groove 110. The shaft core 150 is provided with a plurality of through holes 120 that penetrate through both ends thereof. Figure 1 and Figure 2 As shown, the clamping assembly 100 includes a sleeve 140 and a shaft core 150, the sleeve 140 is provided with a penetrating mounting through hole 141, and the inner circumferential surface of the mounting through hole 141 at one end away from the receiving groove 110 is provided with a thread, the outer diameter of the shaft core 150 is smaller than the diameter of the mounting through hole 141, the shaft core 150 is arranged in the mounting through hole 141, and the end away from the receiving groove 110 is provided with an external thread, the shaft core 150 is threadedly connected to the sleeve 140, there is a spacing between the front end surface of the shaft core 150 and the front end hole edge of the mounting through hole 141, and a receiving groove 110 is formed, the groove wall of the receiving groove 110 is the hole wall of the mounting through hole 141, the groove bottom of the receiving groove 110 and the corresponding end of the shaft core 150 are in the same plane, and the shaft core 150 is evenly and spaced apart with a plurality of through holes 120 penetrating through its two ends.

[0039] It can be understood that the workpiece is clamped in the mounting through hole 141 by the sleeve 140. When the workpiece is subjected to axial processing, the workpiece is offset toward the side close to the shaft core 150 under the action of force, and finally abuts against one end of the shaft core 150, thereby effectively preventing excessive displacement of the workpiece during processing and further improving the processing quality of the workpiece.

[0040] refer to Figure 1 and Figure 4 In some embodiments of the utility model, the shaft core 150 is provided with a material discharge through hole 152 connected to the receiving groove 110, and the material discharge through hole 152 allows a material discharge rod to pass through and extend into the receiving groove 110, and push out the workpiece in the receiving groove 110 to achieve material discharge. It can be understood that the shaft core 150 is provided with a material discharge through hole 152 that passes through and connects to the receiving groove 110, so that the material discharge rod on the machine tool can pass through the material discharge through hole 152 and push out the workpiece located in the receiving groove 110, which is conducive to the material discharge of the workpiece.

[0041] In one embodiment, if Figure 2 As shown, the jacket 140 includes a mounting portion 142 and a plurality of deformable portions 143. The plurality of deformable portions 143 are all arranged at the same end of the mounting portion 142 and are arranged circumferentially at intervals around the axis of the mounting portion 142. The deformable portions 143 can clamp the outer peripheral surface of the workpiece under the action of their own elastic force. It can be understood that by providing the mounting portion 142 and the plurality of deformable portions 143 arranged circumferentially at intervals around one end of the mounting portion 142, when it is necessary to clamp the workpiece, under the action of the machine tool, the ends of the plurality of deformable portions 143 away from the mounting portion 142 move away from each other, so that the jacket 140 is in an expanded state, and the workpiece can be placed in the receiving groove 110. The ends of the plurality of deformable portions 143 away from the mounting portion 142 move closer to each other, so that the jacket 140 is in a closed state, and the workpiece is clamped by the jacket 140, which is convenient for clamping the workpiece.

[0042] It can be understood that there is a gap between every two adjacent deformation parts 143 to increase the elasticity of the sleeve 140, and the gap is formed with a circular through hole at one end close to the mounting part 142 to reduce stress concentration, which is beneficial to the opening and closing of the sleeve 140 and effectively reduces collision deformation when the clamped workpiece vibrates.

[0043] It is understandable that the specific number of the deformation parts 143 can be adjusted according to actual needs. Specifically, the number of the deformation parts 143 can be three, four, etc.

[0044] In one embodiment, the inner circumference of the mounting through hole 141 is provided with a second limiting structure 144, and the outer circumference of the shaft core 150 is provided with a second abutting portion 151, and the second abutting portion 151 is used to abut against the second limiting structure 144 to limit the movement of the shaft core 150 toward the receiving groove 110. Figures 1 to 5As shown, the mounting through hole 141 includes a first mounting section 141a and a second mounting section 141b, the first mounting section 141a is arranged on a side of the second mounting section 141b away from the accommodating groove 110, the cross-sectional dimension of the first mounting section 141a is greater than the cross-sectional dimension of the second mounting section 141b, and the edge of the second mounting section 141b close to one end of the first mounting section 141a forms a second limiting structure 144, and the shaft core 150 is respectively provided with a first section 153 and a second section 154 corresponding to the first mounting section 141a and the second mounting section 141b, the cross-sectional dimension of the first section 153 is greater than the cross-sectional dimension of the second section 154, and the end surface of the first section 153 close to the second section 154 forms a second abutting portion 151; wherein, the first mounting section 141a is threadedly connected to the first section 153, and the cross-sectional dimension of the second mounting section 141b is smaller than the cross-sectional dimension of the first section 153, and larger than the cross-sectional dimension of the second section 154.

[0045] It can be understood that the shaft core 150 moves toward the receiving groove 110 by rotating. When the second abutment portion 151 abuts against the second limiting structure 144, the movement of the shaft core 150 toward the receiving groove 110 is hindered, thereby limiting the movement of the shaft core 150 toward the receiving groove 110 and ensuring that the receiving groove 110 can accommodate the workpiece.

[0046] In one embodiment of the present invention, the clamping assembly 100 further includes an adjustment structure 160, which is disposed on the shaft core 150, connected to the second end, and used to adjust the position of the second end of the elastic member 220 in the insertion hole 120. Figure 1 As shown, the adjustment structure 160 includes a plurality of set screws 161, wherein the number of the set screws 161 is the same as the number of the ejector mechanism 200, each set screw 161 is respectively disposed in each insertion hole 120, and is disposed on the side of the ejector mechanism 200 away from the receiving groove 110, and the inner circumference of one end of each insertion hole 120 corresponding to the mounting portion 142 is provided with an internal thread, the set screw 161 is connected to the shaft core 150 by threading, and one end of the set screw 161 close to the ejector mechanism 200 abuts against the second end. It can be understood that by rotating the set screw 161 to adjust its position in the insertion hole 120, the position of the second end of the elastic member 220 in the insertion hole 120 can be adjusted, thereby adjusting the relative position of the first end and the second end of the elastic member 220, thereby changing the elastic force provided by the elastic member 220 to the ejector pin 210.

[0047] It can be understood that when the processing equipment processes the end face of the workpiece, by rotating the fixing screw 161, the first end and the second end of the elastic member 220 are brought closer to each other, thereby increasing the elastic force that the ejector pin 210 in the processing area can provide to the workpiece processing area, thereby balancing the overall stress of the workpiece, effectively preventing excessive local stress in the workpiece, reducing deformation of the workpiece, and further improving the production yield of the workpiece.

[0048] refer to Figure 1 In one embodiment, the clamping assembly 100 further includes a locking screw 170, which is disposed in the insertion hole 120 and disposed on a side of the set screw 161 away from the receiving groove 110. The locking screw 170 is threadedly connected to the shaft core 150 and abuts against an end of the set screw 161 away from the receiving groove 110. It is understandable that during the long-term use of the anti-retraction clamp, the set screw 161 may become worn and loose, thereby affecting the contact between the workpiece and the ejector pin 210 and increasing the possibility of deformation of the workpiece. By providing the locking screw 170 abutting against the set screw 161, the deformation of the workpiece and other defects caused by the retreat of the set screw 161 can be effectively reduced.

[0049] In one embodiment, the anti-retraction clamp further includes a sealing head 300, which is connected to the jacket 140 and abuts against an end of the shaft core 150 away from the receiving groove 110. Figure 1 As shown, the head 300 adopts a screw, and the head 300 is arranged in the installation through hole 141 and is arranged on the side of the shaft core 150 away from the receiving groove 110. The head 300 is threadedly connected to the sleeve 140 and abuts against the end of the shaft core 150 away from the receiving groove 110; wherein, the head 300 is provided with an avoidance through hole 310 running through both ends thereof, and the avoidance through hole 310 is connected with the unloading through hole 152 of the shaft core 150, and the unloading rod can pass through the avoidance through hole 310 and the unloading through hole 152 and extend into the receiving groove 110, thereby pushing the workpiece in the receiving groove 110 out of the anti-retraction clamp, without adjusting other structures of the chuck, and is conducive to the blanking of the workpiece.

[0050] It is understandable that during long-term use of the anti-retraction clamp, the shaft core 150 may become worn and loose, affecting the contact between the workpiece and the ejector pin 210, thereby increasing the possibility of workpiece deformation. By providing a head 300 abutting against the shaft core 150, defects such as deformation of the workpiece caused by the retreat of the shaft core 150 can be effectively reduced.

[0051] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An anti-retraction clamp, characterized in that: include: A clamping assembly, wherein the clamping assembly is provided with a receiving groove, a plurality of spaced and evenly distributed through holes are provided at the bottom of the receiving groove, and the receiving groove is used to receive the workpiece; A plurality of ejector mechanisms are provided, each of the ejector mechanisms is respectively arranged in each of the insertion holes, the ejector mechanisms include an ejector pin and an elastic member, the ejector pin partially extends out of the insertion hole near the accommodating groove, the elastic member has a first end and a second end arranged opposite to each other, the first end is connected to the ejector pin, and the second end is connected to the clamping assembly, and the elastic member is used to provide an elastic force to make the ejector pin extend out of the insertion hole.

2. The anti-retraction clamp according to claim 1, characterized in that: The inner circumference of the insertion hole is provided with a first limiting structure, and the outer circumference of the ejector pin is provided with a first abutting portion, and the first abutting portion is used to abut against the first limiting structure to limit the height of the ejector pin protruding from the bottom of the accommodating groove.

3. The anti-retraction clamp according to claim 2, characterized in that: The insertion hole includes a first insertion section and a second insertion section, the first insertion section is arranged on a side of the second insertion section away from the accommodating groove, the cross-sectional size of the first insertion section is larger than the cross-sectional size of the second insertion section, the edge of the second insertion section close to one end of the first insertion section forms the first limiting structure, the top pin is respectively provided with a first insertion part and a second insertion part corresponding to the first insertion section and the second insertion section, the cross-sectional size of the first insertion part is larger than the cross-sectional size of the second insertion part, and the end face of the first insertion part close to the second insertion part forms the first abutting part.

4. The anti-retraction clamp according to claim 1, characterized in that: The clamping assembly includes a sleeve and an axis core, the sleeve is provided with a mounting through hole, the axis core is arranged in the mounting through hole, one end of the axis core and the hole wall of the mounting through hole define the accommodating groove, and the axis core is provided with a plurality of through holes passing through both ends thereof.

5. The anti-retraction clamp according to claim 4, characterized in that: The clamping sleeve includes a mounting portion and a plurality of deforming portions, wherein the plurality of deforming portions are arranged at the same end of the mounting portion and are circumferentially spaced around the axis of the mounting portion, and the deforming portions can clamp the outer peripheral surface of the workpiece under the action of their own elastic force.

6. The anti-retraction clamp according to claim 4, characterized in that: The inner circumference of the mounting through hole is provided with a second limiting structure, and the outer circumference of the shaft core is provided with a second abutting portion, and the second abutting portion is used to abut against the second limiting structure to limit the movement of the shaft core toward the accommodating groove.

7. The anti-retraction clamp according to claim 4, characterized in that: The clamping assembly also includes an adjustment structure, which is arranged on the shaft core, connected to the second end, and used to adjust the position of the second end in the insertion hole.

8. The anti-retraction clamp according to claim 7, characterized in that: The adjustment structure includes a plurality of set screws, the set screws are threadedly connected to the shaft core, and one end of the set screw close to the accommodating groove abuts against the elastic member.

9. The anti-retraction clamp according to claim 4, characterized in that: The utility model also comprises a sealing head, which is connected to the jacket and abuts against an end of the shaft core away from the containing groove.

10. The anti-retraction clamp according to claim 4, characterized in that: The shaft core is provided with a material discharge through hole connected to the receiving groove, and the material discharge through hole allows a material pusher rod to pass through and extend into the receiving groove, and push out the workpiece in the receiving groove to realize material discharge.

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