An electromagnetic ejector rod extrusion clamp and a forming method of an electromagnetic ejector rod

Abstract

The application provides an electromagnet ejector rod extrusion clamp and an electromagnet ejector rod forming method, and belongs to the technical field of electromagnet ejector rod production equipment, and comprises a support sleeve, the support sleeve is provided with a workpiece positioning hole and at least two extrusion holes, the extrusion holes are distributed in a radial manner around the workpiece positioning hole, the outer end of the extrusion hole is located on the outer circumferential surface of the support sleeve and the inner end is communicated with the workpiece positioning hole, a movable extrusion rod is arranged in each extrusion hole, the two ends of the extrusion rod are a force receiving end and an extrusion end respectively, the force receiving end extends out of the outer end of the extrusion hole, and the extrusion end is located at the inner end of the extrusion hole; a pressing sleeve is movably sleeved on the support sleeve, the pressing sleeve is provided with a tapered hole, the hole wall surface of the tapered hole surrounds the outer circumferential surface of the support sleeve, and the force receiving end of each extrusion rod is in abutting connection with the hole wall surface of the tapered hole; the application has the beneficial effects that a plurality of convex points can be formed on the ejector rod with high efficiency and precision by the extrusion clamp, and the size of the convex points can be accurately controlled.

Description

Technical Field

[0001] This invention belongs to the technical field of electromagnet push rod production equipment, and relates to an electromagnet push rod extrusion fixture and an electromagnet push rod forming method. Background Technology

[0002] An electromagnet push rod is a component used for electromagnets. Since the electromagnet push rod needs to be fixed together with the push head, multiple radially protruding protrusions need to be formed at the end of the electromagnet push rod. The end of the electromagnet push rod is inserted into the mounting hole of the push head, and the push rod and the push head are fixed together by the protrusions.

[0003] Because the diameter of the electromagnet push rod is small, the size of the protrusion is very difficult to control during the forming process. If the protrusion is too large, the end of the push rod cannot be inserted into the mounting hole of the push head; if the protrusion is too small, the end of the push rod will loosen from the mounting hole, or even fail to lock into place with the push head. For these reasons, accurately forming the protrusion at the end of the electromagnet push rod is a major challenge in existing technologies, and the forming process also suffers from low efficiency and difficulty in forming multiple protrusions at once. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the prior art by proposing an electromagnet push rod extrusion fixture and a method for forming the electromagnet push rod.

[0005] The objective of this invention can be achieved through the following technical solution: an electromagnet push rod pressing clamp, comprising:

[0006] A support sleeve is provided with a workpiece positioning hole and at least two extrusion holes. Each extrusion hole is radially distributed around the workpiece positioning hole. The outer end of each extrusion hole is located on the outer circumferential surface of the support sleeve and the inner end is connected to the workpiece positioning hole. A movable extrusion rod is inserted into each extrusion hole. The two ends of the extrusion rod are a force-bearing end and an extrusion end, respectively. The force-bearing end extends from the outer end of the extrusion hole, and the extrusion end is located at the inner end of the extrusion hole.

[0007] A pressure sleeve is movably fitted onto the support sleeve. The pressure sleeve is provided with a tapered hole, the wall surface of which surrounds the outer peripheral surface of the support sleeve, and the force-bearing end of each of the extrusion rods abuts against the wall surface of the tapered hole.

[0008] When the pressure sleeve moves relative to the support sleeve in the extrusion direction, the wall surface of the tapered hole pushes each of the extrusion rods to move simultaneously toward the workpiece positioning hole, and the displacement of the extrusion end of each of the extrusion rods into the workpiece positioning hole is determined by the displacement of the pressure sleeve.

[0009] Preferably, it also includes a base, the support sleeve is mounted on the base, and the pressing direction of the pressure sleeve is set to the direction in which the pressure sleeve moves toward the base.

[0010] Preferably, the bottom of the support sleeve is provided with a bottom hole, which communicates with the workpiece positioning hole, and the base is provided with a positioning protrusion, which is inserted into the bottom hole to connect the support sleeve with the base.

[0011] Preferably, the device also includes a press, the press sleeve is connected to the press, and the press can drive the press sleeve to move relative to the support sleeve.

[0012] Preferably, a spring is installed inside the extrusion hole, and the spring is in contact with the extrusion rod inside the extrusion hole; when the pressure sleeve moves along the extrusion direction, the extrusion rod moves toward the workpiece positioning hole and the spring deforms and stores force, and when the pressure sleeve moves along the reset direction, the extrusion rod resets under the action of the spring so that the extrusion end exits the workpiece positioning hole.

[0013] Preferably, the number of extrusion holes is set to three and they are distributed in a Y-shape.

[0014] Preferably, the inner ends of the three extrusion holes are interconnected, and the intersection of the inner ends of two adjacent extrusion holes forms a clearance portion, and the clearance portion and the extrusion rod in another extrusion hole are respectively located on opposite sides of the workpiece positioning hole.

[0015] Preferably, the pressure sleeve is further provided with a through hole, the through hole is connected to the top end of the tapered hole, the upper part of the support sleeve passes through the through hole, and the workpiece positioning hole is connected to the through hole.

[0016] Preferably, the base is fixedly provided with an inverted L-shaped travel limit rod, and the pressure sleeve abuts against the travel limit rod when it is reset to the limit position.

[0017] A method for forming an electromagnet push rod, comprising the aforementioned electromagnet push rod extrusion fixture, and further comprising the following steps:

[0018] S1: Insert the ejector pin to be processed into the through hole of the pressure sleeve, and insert the lower part of the ejector pin into the positioning hole of the workpiece until the end of the ejector pin abuts against the positioning protrusion of the base.

[0019] S2: The press drives the pressure sleeve to move along the extrusion direction. When the pressure sleeve is extruding, it extrudes each extrusion rod through the wall of the tapered hole. The extrusion ends of each extrusion rod extend into the workpiece positioning hole at the same time and extrude the push rod. After being extruded by the extrusion ends, the push rod forms a protrusion on the opposite side of the extruded part, thus forming multiple radial protrusions on the push rod.

[0020] S3: The size of the protrusion is determined by the extrusion displacement of the pressure sleeve. After the pressure sleeve moves to the set position along the extrusion direction, a protrusion of the set size is formed on the push rod.

[0021] S4: Drive the pressure sleeve to move in the reset direction, and each pressing rod moves outward to reset under the action of the spring, and then remove the top rod.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. Multiple protrusions can be formed on the push rod efficiently and accurately using the extrusion fixture, and the size of the protrusions can be precisely controlled.

[0024] 2. The positioning protrusion inserted into the bottom hole of the support sleeve can position the support sleeve, so that the support sleeve is in the set position on the base, and can also prevent the support sleeve from moving. In addition, the bottom hole is connected to the workpiece positioning hole. When the ejector rod to be processed is inserted into the workpiece positioning hole, it goes straight to the bottom and contacts the positioning protrusion, thereby axially positioning the ejector rod and preventing the ejector rod from moving during extrusion molding.

[0025] 3. The pressure of the compression sleeve comes from the hydraulic press. The hydraulic press can apply pressure to the compression sleeve, thereby causing the compression sleeve to move in the extrusion direction, and then transmit the pressure of the hydraulic press to the extrusion rod, so that the extrusion rod can form a protrusion on the push rod.

[0026] 4. The spring is used to keep the extrusion rod in the initial position and to automatically reset the extrusion rod after extrusion. When the extrusion rod is in the initial position, the extrusion end is out of the workpiece positioning hole, so the ejector rod can be smoothly inserted into the workpiece positioning hole. After the ejector rod is extruded and formed, the pressure sleeve resets, and the extrusion rod expands outward under the action of the spring to reset.

[0027] 5. The upper part of the support sleeve is a columnar structure, so the upper end of the support sleeve can be inserted into the through hole. The through hole acts as a guide hole, allowing the pressure sleeve to slide on the support sleeve. The push rod needs to be inserted into the workpiece positioning hole through the upper opening of the through hole. Attached Figure Description

[0028] Figure 1 This is an exploded view of the structure of the electromagnet push rod extrusion clamp of the present invention.

[0029] Figure 2 This is a front view of the electromagnet push rod extrusion clamp of the present invention.

[0030] Figure 3 for Figure 2 Schematic diagram of AA section.

[0031] Figure 4 for Figure 2 Schematic diagram of BB cross section.

[0032] In the diagram, 100 is the support sleeve; 110 is the workpiece positioning hole; 120 is the extrusion hole; 121 is the spring; 130 is the extrusion rod; 131 is the force-bearing end; 132 is the extrusion end; 140 is the bottom hole; 150 is the clearance part; 200 is the pressure sleeve; 210 is the tapered hole; 220 is the through hole; 300 is the base; 310 is the positioning protrusion; 320 is the stroke limit rod; and 400 is the top rod. Detailed Implementation

[0033] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0034] like Figure 1-4 As shown, an electromagnet push rod extrusion fixture includes: a support sleeve 100 and a pressure sleeve 200. The support sleeve 100 is provided with a workpiece positioning hole 110 and at least two extrusion holes 120. The extrusion holes 120 are radially distributed around the workpiece positioning hole 110. The outer end of the extrusion hole 120 is located on the outer peripheral surface of the support sleeve 100 and the inner end is connected to the workpiece positioning hole 110. A movable extrusion rod 130 is inserted into each extrusion hole 120. The two ends of the extrusion rod 130 are a force-bearing end 131 and an extrusion end 132, respectively. The force-bearing end 131 extends out from the outer end of the extrusion hole 120, and the extrusion end 132 is located at the extrusion hole 120. The inner end of the pressing hole 120; the pressing sleeve 200 is movably sleeved on the support sleeve 100. The pressing sleeve 200 is provided with a tapered hole 210. The hole wall of the tapered hole 210 surrounds the outer peripheral surface of the support sleeve 100, and the force-bearing end 131 of each pressing rod 130 abuts against the hole wall of the tapered hole 210. When the pressing sleeve 200 moves relative to the support sleeve 100 in the pressing direction, the hole wall of the tapered hole 210 pushes each pressing rod 130 to move towards the workpiece positioning hole 110 at the same time, and the displacement of the pressing end 132 of each pressing rod 130 into the workpiece positioning hole 110 is determined by the displacement of the pressing sleeve 200.

[0035] The support sleeve 100 is used to support and position the push rod 400 (workpiece). The workpiece positioning hole 110 is vertically arranged. The extrusion hole 120 is arranged radially along the workpiece positioning hole 110, and the number of extrusion holes 120 is consistent with the number of protrusions that need to be processed on the push rod 400. The push rod 400 can be inserted into the workpiece positioning hole 110. When the extrusion rod 130 in the extrusion hole 120 extrudes inward, it can extrude the push rod 400 through the extrusion end 132. The opposite position of the extruded part of the push rod 400 will bulge radially to form a protrusion, and the size of the protrusion is consistent with the extension amount of the extrusion end 132. Therefore, the size of the protrusion can be controlled by controlling the extension amount of the extrusion end 132.

[0036] In this example, the force-bearing end 131 is a spherical or arc-shaped structure, the wall of the tapered hole 210 is a tapered structure, the tapered hole 210 is set to gradually increase in size from top to bottom, and the pressing direction of the pressure sleeve 200 is downward. When the pressure sleeve 200 moves downward, the pressure sleeve 200 presses the force-bearing end 131 through the wall of the tapered hole 210. The wall of the tapered hole 210 converts the downward pressure of the pressure sleeve 200 into the thrust of the pressing rod 130 pushing inward, thereby causing the pressing rod 130 to move into the workpiece positioning hole 110.

[0037] Multiple extrusion rods 130 are driven by a pressure sleeve 200 to extrude the push rod 400 in a synchronous action. The position of the extrusion rods 130 is determined by the position of the pressure sleeve 200, which makes it easier to control the size of the protrusion. This allows for the precise forming of the protrusion of the designed size on the small-diameter electromagnet push rod 400, with high forming efficiency and good results.

[0038] like Figure 1 As shown, based on the above embodiment, it also includes a base 300, a support sleeve 100 mounted on the base 300, and the pressing direction of the pressure sleeve 200 is set to the direction in which the pressure sleeve 200 moves toward the base 300. The support sleeve 100 is placed on the base 300 and the two are connected, and the base 300 serves to support the support sleeve 100.

[0039] Based on the above embodiment, the bottom of the support sleeve 100 is provided with a bottom hole 140, which communicates with the workpiece positioning hole 110. The base 300 is provided with a positioning protrusion 310, which is inserted into the bottom hole 140 to connect the support sleeve 100 and the base 300. The positioning protrusion 310 inserted into the bottom hole 140 of the support sleeve 100 can position the support sleeve 100, so that the support sleeve 100 is in a set position on the base 300, and can also prevent the support sleeve 100 from moving. In addition, the bottom hole 140 communicates with the workpiece positioning hole 110. When the ejector rod 400 to be processed is inserted into the workpiece positioning hole 110, it is inserted straight to the bottom and contacts the positioning protrusion 310, thereby axially positioning the ejector rod 400 and preventing the ejector rod 400 from moving during extrusion molding.

[0040] like Figure 1-4 As shown, based on the above embodiment, a press is also included. The pressing sleeve 200 is connected to the press, and the press can drive the pressing sleeve 200 to move relative to the support sleeve 100.

[0041] The pressure of the compression sleeve 200 comes from the hydraulic press. The hydraulic press can apply pressure to the compression sleeve 200, thereby causing the compression sleeve 200 to move in the extrusion direction, and then transmit the pressure of the hydraulic press to the extrusion rod 130, so that the extrusion rod 130 can form a protrusion on the push rod 400.

[0042] like Figure 1 , Figure 3 , Figure 4 As shown, based on the above embodiment, a spring 121 is installed in the extrusion hole 120, and the spring 121 is in contact with the extrusion rod 130 in the extrusion hole 120; when the pressure sleeve 200 moves along the extrusion direction, the extrusion rod 130 moves toward the workpiece positioning hole 110 and the spring 121 deforms and stores force, and when the pressure sleeve 200 moves along the reset direction, the extrusion rod 130 resets under the action of the spring 121 so that the extrusion end 132 exits the workpiece positioning hole 110.

[0043] Spring 121 is used to hold the extrusion rod 130 in the initial position and to automatically reset the extrusion rod 130 after extrusion. When the extrusion rod 130 is in the initial position, the extrusion end 132 is out of the workpiece positioning hole 110, so the push rod 400 can be smoothly inserted into the workpiece positioning hole 110. After the push rod 400 is extruded and formed, the pressure sleeve 200 is reset, and the extrusion rod 130 expands outward under the action of spring 121 to reset.

[0044] like Figure 1 , Figure 4 As shown, based on the above embodiment, the number of extrusion holes 120 is set to three and distributed in a Y-shape.

[0045] Based on the above embodiment, the inner ends of the three extrusion holes 120 are interconnected, and the junction of the inner ends of two adjacent extrusion holes 120 forms a clearance portion 150. The clearance portion 150 and the extrusion rod 130 in another extrusion hole 120 are respectively located on opposite sides of the workpiece positioning hole 110.

[0046] It should be noted that the principle of forming the protrusion of the push rod 400 is to press the surface of the push rod 400 by the extrusion end 132, and the push rod 400 protrudes outward at the position opposite to the extruded part to form a protrusion. Therefore, a corresponding clearance part 150 needs to be reserved. The clearance part 150 corresponds to the opposite position. The clearance part 150 can be regarded as the cavity part of the workpiece positioning hole 110 extending radially. When the push rod 400 is extruded, the part of the push rod 400 corresponding to the clearance part 150 (i.e. the opposite position) protrudes outward, thereby forming a protrusion in the clearance part 150.

[0047] In the example, the diameter of the inner end of the extrusion hole 120 is large enough, so a clearance portion 150 is formed at the intersection of the inner ends of two adjacent extrusion holes 120, and the clearance portion 150 is located exactly opposite the extrusion rod 130 in the other extrusion hole 120. When the extrusion rod 130 in the other extrusion hole 120 extrudes the top rod 400, the top rod 400 protrudes into the clearance portion 150 to form a protrusion.

[0048] like Figure 1 , Figure 3As shown, based on the above embodiment, the pressure sleeve 200 is further provided with a through hole 220, which communicates with the top end of the tapered hole 210. The upper part of the support sleeve 100 passes through the through hole 220, and the workpiece positioning hole 110 communicates with the through hole 220. The upper part of the support sleeve 100 has a columnar structure, so the upper end of the support sleeve 100 can be inserted into the through hole 220. The through hole 220 acts as a guide hole, allowing the pressure sleeve 200 to slide on the support sleeve 100. The push rod 400 needs to be inserted into the workpiece positioning hole 110 through the upper opening of the through hole 220.

[0049] like Figure 1-2 As shown, based on the above embodiment, the base 300 is fixedly provided with an inverted L-shaped travel limit rod 320, and the pressure sleeve 200 is in contact with the travel limit rod 320 when it is reset to the limit position.

[0050] like Figure 1-4 As shown, a method for forming an electromagnet push rod includes an electromagnet push rod extrusion fixture, and further includes the following steps:

[0051] S1: Insert the ejector pin 400 to be processed into the through hole 220 of the pressure sleeve 200, and insert the lower part of the ejector pin 400 into the workpiece positioning hole 110 until the end of the ejector pin 400 abuts against the positioning protrusion 310 of the base 300.

[0052] S2: The press drives the pressure sleeve 200 to move along the extrusion direction. When the pressure sleeve 200 is extruded, it extrudes each extrusion rod 130 through the wall of the tapered hole 210. The extrusion ends 132 of each extrusion rod 130 are simultaneously extended into the workpiece positioning hole 110 and extrudes the push rod 400. After being extruded by the extrusion ends 132, the push rod 400 forms a protrusion on the opposite side of the extruded part, thereby forming multiple radial protrusions on the push rod 400.

[0053] S3: The size of the protrusion is determined by the extrusion displacement of the pressure sleeve 200. After the pressure sleeve 200 moves to the set position along the extrusion direction, a protrusion of the set size is formed on the push rod 400.

[0054] S4: Drive the pressure sleeve 200 to move in the reset direction, and each pressing rod 130 moves outward to reset under the action of the spring 121, and then remove the top rod 400.

[0055] The ejector pin 400 has a relatively small diameter, making it difficult to process with conventional tooling, especially to form multiple protrusions of the required size on the ejector pin 400 in one operation. This method, however, utilizes an extrusion fixture to form multiple protrusions of the required size on the ejector pin 400 in one operation. Specifically, during the forming process, the small-diameter ejector pin 400 is first positioned using the workpiece positioning hole 110 on the support sleeve 100. Then, the downward displacement of the pressure sleeve 200 is selected according to the required protrusion size. Next, the press drives the pressure sleeve 200 to press down by the set displacement, positioning it in the designated position. The pressure sleeve 200 then presses each extrusion rod 130 inward through the wall of the tapered hole 210. Each extrusion rod 130 moves synchronously by the corresponding displacement, thus forming protrusions of the corresponding size on the ejector pin 400. Therefore, the efficiency is very high, and the size of the protrusions can be precisely controlled, ensuring a high product qualification rate.

[0056] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0057] Furthermore, in this invention, descriptions involving "first," "second," "a," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0058] In this invention, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "fixed" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction between two elements, unless otherwise explicitly limited.

[0059] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. An electromagnet push rod pressing clamp, characterized in that, include: A support sleeve (100) is provided with a workpiece positioning hole (110) and at least two extrusion holes (120). Each of the extrusion holes (120) is radially distributed around the workpiece positioning hole (110). The outer end of each extrusion hole (120) is located on the outer circumferential surface of the support sleeve (100) and the inner end is connected to the workpiece positioning hole (110). A movable extrusion rod (130) is inserted into each of the extrusion holes (120). The two ends of the extrusion rod (130) are a force-bearing end (131) and an extrusion end (132), respectively. The force-bearing end (131) extends out from the outer end of the extrusion hole (120), and the extrusion end (132) is located at the inner end of the extrusion hole (120). A pressure sleeve (200) is movably fitted onto the support sleeve (100). The pressure sleeve (200) is provided with a tapered hole (210). The wall of the tapered hole (210) surrounds the outer peripheral surface of the support sleeve (100), and the force-bearing end (131) of each of the extrusion rods (130) abuts against the wall of the tapered hole (210). When the pressure sleeve (200) moves relative to the support sleeve (100) in the extrusion direction, the wall surface of the tapered hole (210) pushes each of the extrusion rods (130) to move simultaneously toward the workpiece positioning hole (110), and the displacement of the extrusion end (132) of each of the extrusion rods (130) into the workpiece positioning hole (110) is determined by the displacement of the pressure sleeve (200).

2. The electromagnet push rod pressing fixture as described in claim 1, characterized in that: It also includes a base (300), the support sleeve (100) is mounted on the base (300), and the pressing direction of the pressure sleeve (200) is set to the direction in which the pressure sleeve (200) moves toward the base (300).

3. The electromagnet push rod pressing fixture as described in claim 2, characterized in that: The bottom of the support sleeve (100) is provided with a bottom hole (140), which communicates with the workpiece positioning hole (110). The base (300) is provided with a positioning protrusion (310), which is inserted into the bottom hole (140) to connect the support sleeve (100) with the base (300).

4. The electromagnet push rod pressing fixture as described in claim 2, characterized in that: It also includes a press, the press sleeve (200) is connected to the press and the press can drive the press sleeve (200) to move relative to the support sleeve (100).

5. The electromagnet push rod pressing fixture as described in claim 1, characterized in that: A spring (121) is installed inside the extrusion hole (120), and the spring (121) is in contact with the extrusion rod (130) inside the extrusion hole (120). When the pressure sleeve (200) moves along the extrusion direction, the extrusion rod (130) moves toward the workpiece positioning hole (110) and the spring (121) deforms and stores force. When the pressure sleeve (200) moves along the reset direction, the extrusion rod (130) resets under the action of the spring (121) so that the extrusion end (132) exits the workpiece positioning hole (110).

6. The electromagnet push rod pressing fixture as described in claim 1, characterized in that: The number of extrusion holes (120) is set to three and distributed in a Y shape.

7. The electromagnet push rod pressing fixture as described in claim 6, characterized in that: The inner ends of the three extrusion holes (120) are interconnected, and the intersection of the inner ends of two adjacent extrusion holes (120) forms a clearance portion (150). The clearance portion (150) and the extrusion rod (130) in another extrusion hole (120) are respectively located on opposite sides of the workpiece positioning hole (110).

8. The electromagnet push rod pressing fixture as described in claim 1, characterized in that: The pressure sleeve (200) is also provided with a through hole (220), which is connected to the top end of the tapered hole (210). The upper part of the support sleeve (100) passes through the through hole (220), and the workpiece positioning hole (110) is connected to the through hole (220).

9. The electromagnet push rod pressing fixture as described in claim 2, characterized in that: The base (300) is fixedly provided with an inverted L-shaped travel limit rod (320), and the pressure sleeve (200) abuts against the travel limit rod (320) when it is reset to the limit position.

10. A method for forming an electromagnet push rod, characterized in that, The electromagnet push rod pressing fixture as described in any one of claims 1-9 further includes the following steps: S1: Insert the push rod (400) to be processed into the through hole (220) of the pressure sleeve (200), and insert the lower part of the push rod (400) into the workpiece positioning hole (110) until the end of the push rod (400) abuts against the positioning protrusion (310) of the base (300); S2: The press drives the pressure sleeve (200) to move along the extrusion direction. When the pressure sleeve (200) is extruded, it extrudes each extrusion rod (130) through the hole wall of the tapered hole (210). The extrusion ends (132) of each extrusion rod (130) are simultaneously extended into the workpiece positioning hole (110) and extrudes the push rod (400). After the push rod (400) is extruded by the extrusion end (132), a protrusion is formed on the opposite side of the extruded part, thereby forming multiple radial protrusions on the push rod (400). S3: The size of the protrusion is determined by the extrusion displacement of the pressure sleeve (200). After the pressure sleeve (200) moves to the set position along the extrusion direction, a protrusion of the set size is formed on the push rod (400). S4: Drive the pressure sleeve (200) to move in the reset direction, and each pressing rod (130) moves outward to reset under the action of the spring (121), and then remove the push rod (400).

Images