Clamp and ejector pin manufacturing system

Abstract

The present application belongs to the technical field of clamps, and discloses a clamp and a ejector rod preparation system. The clamp comprises a jig seat, a base, a movable reference table, a positioning table and a clamping assembly. The positioning table is installed on the movable reference table, and the positioning table is provided with a plurality of positioning grooves at intervals in a second direction. The clamping assembly comprises a pressing frame and a push block. The pressing frame is provided with a clamping slider capable of sliding in the second direction. A side of the clamping slider facing the positioning table is provided with a plurality of first positioning edges at intervals in the second direction. The push block is threadedly connected with the positioning table through a first fastener, so that the first positioning edges and the groove walls of the positioning grooves form an accommodation area. The first fastener is used for adjusting the distance between the first positioning edges and the groove walls of the positioning grooves. The distance between the movable reference table and the base is adjusted to meet the height required by the ejector rod. The first fastener is screwed into the jig seat, and the accommodation area is increased or reduced to clamp the ejector rod with different cross-sectional areas.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of clamps, in particular to a clamp and a ejector rod preparation system. BACKGROUND

[0002] The square ejector rod is a product ejection mechanism in a mold, which needs to ensure normal demolding after product injection molding and product appearance.

[0003] At present, the square ejector rod is usually processed by a forming grinder to ensure the machining precision of the height of the square ejector rod. The existing forming grinder clamp can clamp multiple square ejector rods, but the clamping is complicated, each square ejector rod needs to be fixed by corresponding screws, which leads to a long clamping time, reduces the machining efficiency of the square ejector rod, and is not conducive to the batch production of the square ejector rod. Moreover, the forming grinder clamp can only clamp square ejector rods with the same cross-sectional area, which reduces the application range of the clamp. SUMMARY

[0004] The purpose of the present application is to provide a clamp and an ejector rod preparation system, which can clamp multiple ejector rods at a time and are suitable for clamping ejector rods with different cross-sectional areas while reducing the number of screws used.

[0005] To achieve this purpose, the present application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a clamp, comprising: a jig seat, opposite ends of the jig seat are provided with a base and a movable reference table, the movable reference table can move along a first direction relative to the jig seat, and a limiting surface is arranged on one side of the base facing the movable reference table; a positioning table installed on the movable reference table, the positioning table is spaced apart along a second direction and provided with a plurality of positioning grooves; a clamping assembly comprising a pressing frame and a push block, the pressing frame is provided with a clamping slider capable of sliding along the second direction, a plurality of first positioning edges are arranged on one side of the clamping slider facing the positioning table along the second direction, and the push block is threadedly connected with the positioning table by a first fastener to form an accommodation area between the first positioning edges and the groove walls of the positioning grooves, and the first fastener is used to adjust the distance between the first positioning edges and the groove walls of the positioning grooves.

[0007] As an optional solution of the clamp, the clamping slider is provided with two, and a first elastic member is connected between each clamping slider and the inner side wall of the pressing frame, the first elastic member is used to make the two clamping sliders close to each other, the push block abuts against the two clamping sliders, and the push block is used to push the clamping sliders to move towards the positioning table and along the second direction.

[0008] As an alternative to the clamp, the inner wall of the pressing frame is provided with a first guide protrusion extending in the second direction, and the clamping slider is provided with a first guide sliding groove, and the first guide protrusion is slidingly arranged in the first guide sliding groove.

[0009] As an alternative to the clamp, the clamp further comprises a plurality of pressing heads arranged on the side of the pressing frame facing the positioning table and capable of extending or retracting relative to the pressing frame, and at least one pressing head is arranged in each accommodation area.

[0010] As an alternative to the clamp, the clamping assembly further comprises a second elastic member and a cover frame, the pressing frame is provided with a linear hole and a circular hole in communication, the cover frame is mounted on the pressing frame and blocks the circular hole, a field of the pressing head is arranged in the linear hole, and a cylindrical segment of the pressing head is arranged in the circular hole, and the second elastic member is arranged between the cylindrical segment and the cover frame.

[0011] As an alternative to the clamp, the push block passes through the cover frame at the end opposite to the positioning table, and the push block is slidingly connected to the inner side wall of the cover frame in the third direction.

[0012] As an alternative to the clamp, the side of the positioning table facing the movable reference table is recessed with a dovetail groove extending in the second direction, the side of the movable reference table facing the positioning table is provided with a dovetail protrusion, the dovetail protrusion is arranged in the dovetail groove, and a second fastener passes through the through hole and is connected with the movable reference table.

[0013] As an alternative to the clamp, the movable reference table is provided with a guide column extending in the first direction, and the jig seat is provided with a guide hole, and one end of the guide column opposite to the movable reference table is slidingly arranged in the guide hole.

[0014] As an alternative to the clamp, the movable reference table is provided with a rack extending in the first direction, the jig seat is recessed with a first guide groove, one end of the rack opposite to the movable reference table is slidingly arranged in the first guide groove, the jig seat is provided with a locking assembly, the locking assembly is connected with the rack, and is used for limiting the distance between the movable reference table and the base.

[0015] As an alternative to the clamp, the jig seat is concave with a second guide groove extending along a third direction and communicating with the first guide groove, the locking assembly comprises a third elastic member and a positioning buckle, the positioning buckle is slidingly arranged in the second guide groove, one end of the positioning buckle protrudes out of the second guide groove and is connected with the rack, and the other end of the positioning buckle is provided with the third elastic member between the other end and the groove bottom of the second guide groove, and the third elastic member is used to make the positioning buckle move towards the rack.

[0016] As an alternative to the clamp, the locking assembly further comprises a handle and a mounting plate, the mounting plate is arranged at the slot opening of the second guide groove, the mounting plate is provided with a third guide groove extending along the third direction, one end of the handle is connected with the positioning buckle, and the other end of the handle passes through the side wall of the third guide groove and is arranged outside the third guide groove.

[0017] In a second aspect, the present application provides a top rod preparation system, comprising a grinding machine and the clamp as described in the first aspect or any one of the first aspect, the clamp is used to clamp a top rod, the top rod clamped by the clamp is in contact with the grinding machine, and the grinding machine is used to grind the top rod.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] The clamp provided by the present application is provided with a base and a movable reference table at opposite ends of the jig seat, the movable reference table can slide (or move) along a first direction relative to the jig seat, is used to adjust the distance between the movable reference table and the base, and meets the height requirement of the top rod; the positioning table on the movable reference table is provided with positioning grooves, a plurality of first positioning edges on the clamping sliding block and the groove walls of the plurality of positioning grooves form a plurality of accommodation areas therebetween, are suitable for clamping top rods with different cross-sectional areas (such as square top rods or circular top rods), one end of the top rod abuts against the limiting surface of the base, and the tail end of the top rod passes through the accommodation area; since the reference surfaces of the plurality of top rods are all limiting surfaces, the height of the top rods prepared in the same batch can be accurately controlled. Moreover, the opposite two side surfaces of the top rod are clamped between the first positioning edges and the groove walls of the positioning grooves, and the other two opposite side surfaces of the top rod are clamped between the pressing frame and the groove bottom of the positioning grooves, so that the top rod can be clamped in all directions, and the stability of clamping is ensured; the first fastener is screwed to the jig seat, the first positioning edges of the clamping sliding block can be pushed to be close to the groove walls of the positioning grooves by the push block, and different cross-sectional area top rods can be clamped by increasing or reducing the accommodation area; the pressing frame can be pressed onto the positioning table by a single first fastener, the number of the first fasteners is reduced, a plurality of top rods can be clamped at one time, the application range of the clamp is expanded, and the batch production of the top rods is facilitated; the positioning table and the clamping assembly are replaceable, maintenance is facilitated, the entire clamp is not scrapped due to failure of a single part, and the use cost is reduced.

[0020] The ejection rod preparation system provided by the present application adjusts the distance between the movable reference table and the base, and the grinding machine grinds the ejection rod to meet the required machining height of the ejection rod; the ejection rod is clamped between the first positioning edge and the groove wall of the positioning groove on two opposite sides, and the ejection rod is clamped between the pressing frame and the groove bottom of the positioning groove on the other two opposite sides, so that the ejection rod is clamped in all directions; the first fastener is screwed into the jig base, and the accommodation area is increased or reduced to clamp the ejection rod with different cross-sectional areas. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structure schematic diagram of the jig in a non-height adjustment state provided by the embodiment of the present application;

[0022] Figure 2 is a structure schematic diagram of the jig in a height adjustment state provided by the embodiment of the present application;

[0023] Figure 3 is a first explosion schematic diagram of the jig provided by the embodiment of the present application;

[0024] Figure 4 is Figure 3 is a partial enlarged view of A in FIG. 5;

[0025] Figure 5 is a second explosion schematic diagram of the jig provided by the embodiment of the present application;

[0026] Figure 6 is Figure 5 is a partial enlarged view of B in FIG. 6;

[0027] Figure 7 is a structure schematic diagram of the clamping sliding block provided by the embodiment of the present application;

[0028] Figure 8 is a structure schematic diagram of the positioning table provided by the embodiment of the present application;

[0029] Figure 9 is a structure schematic diagram of the pressing head provided by the embodiment of the present application;

[0030] Figure 10 is an explosion schematic diagram of the pressing frame and the cover plate frame provided by the embodiment of the present application;

[0031] Figure 11 is a partial explosion schematic diagram of the locking assembly on the jig base provided by the embodiment of the present application;

[0032] Figure 12 is an explosion diagram of the pressing frame from a first perspective provided by the embodiment of the present application;

[0033] Figure 13 is an explosion diagram of the pressing frame from a second perspective provided by the embodiment of the present application;

[0034] Figure 14 is a third explosive schematic diagram of the jig of the embodiment of the present application.

[0035] In the figure:

[0036] 1, jig base; 2, base; 3, movable reference table; 4, positioning table; 5, clamping assembly; 6, pressure head; 61, field; 62, cylindrical section; 7, first fastener; 8, third fastener; 9, ejector pin; 10, locking assembly; 101, third elastic member; 102, positioning buckle; 103, handle; 104, mounting plate; 1041, third guide groove;

[0037] 11, guide hole; 12, first guide groove; 13, second guide groove; 14, long hole;

[0038] 21, limiting surface;

[0039] 31, dovetail protruding portion; 32, guide column; 33, rack;

[0040] 41, positioning groove; 411, groove wall; 42, second via hole; 43, dovetail groove; 44, through hole;

[0041] 51, pressing frame; 511, first guide protruding portion; 512, slot; 513, circular hole; 514, first connecting hole; 515, butt joint groove; 516, butt joint protrusion; 517, fourth fastener; 52, push block; 521, second guide chute; 522, first via hole; 53, clamping slider; 531, first positioning edge; 532, mounting groove; 533, first guide chute; 54, first elastic member; 55, second elastic member; 56, cover plate frame; 561, second connecting hole; 57, first frame body; 58, second frame body. DETAILED DESCRIPTION

[0042] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, and are not a limitation on the present application. In addition, it should be noted that, for the sake of description, only the parts related to the present application are shown in the drawings, not all structures.

[0043] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0046] This embodiment provides a clamp for clamping a push rod. The push rod in this embodiment includes, but is not limited to, round push rods and square push rods. The following describes the process in conjunction with... Figures 1 to 14 The specific content of this embodiment will be described in detail.

[0047] In this embodiment, as Figure 1 and Figure 3 As shown, the example uses the X direction as the first direction, the Y direction as the second direction, and the Z direction as the third direction. The first, second, and third directions are perpendicular to each other.

[0048] In the embodiment, the clamp comprises a jig base 1, a base 2, a movable reference table 3, a positioning table 4, and a clamping assembly 5. The opposite ends of the jig base 1 are provided with the base 2 and the movable reference table 3. The movable reference table 3 can move along a first direction relative to the jig base 1 to realize approaching or moving away from the base 2. The side of the base 2 facing the movable reference table 3 is provided with a limiting surface 21. The limiting surface 21 is used to contact one end of the top rod 9 to be machined, so that the reference surfaces of the plurality of top rods are all the limiting surfaces, thereby the height of the top rods prepared in the same batch can be accurately controlled. For example, the limiting surface 21 is a plane, and one end of the plurality of top rods 9 to be machined is in contact with the limiting surface 21. The positioning table 4 is installed on the movable reference table 3 (the specific installation method can be referred to the relevant description below, which will not be described here). The positioning table 4 is provided with a plurality of positioning grooves 41 along a second direction. In the embodiment, the positioning grooves 41 can be rectangular positioning grooves, and the opposite sides of the rectangular positioning grooves are groove walls 411. The clamping assembly 5 comprises a pressing frame 51, a push block 52, and a clamping sliding block 53. The clamping sliding block 53 is arranged in the pressing frame 51 and can move along the second direction. The side of the clamping sliding block 53 facing the positioning table 4 is provided with a plurality of first positioning edges 531 along the second direction. The push block 52 is connected with the positioning table 4 through a first fastener 7 to form an accommodation area between the first positioning edges 531 and the groove walls of the positioning grooves 41. The first fastener 7 is used to adjust the distance between the first positioning edges 531 and the groove walls 411 of the positioning grooves 41.

[0049] Briefly, the fixture provided by the present application is provided with a base 2 and a movable reference table 3 at opposite ends of a jig seat 1, the movable reference table 3 is capable of sliding along a first direction relative to the jig seat 1, for adjusting the distance between the movable reference table 3 and the base 2 to meet the height required by the ejector pin 9; the positioning table 4 on the movable reference table 3 is provided with positioning grooves 41, a plurality of first positioning edges 531 on the clamping slider 53 and the groove walls 411 of the plurality of positioning grooves 41 form a plurality of accommodation areas, the leading end of the ejector pin 9 abuts against the limiting surface 21 of the base 2, the trailing end of the ejector pin 9 passes through the accommodation area, the opposite two sides of the ejector pin 9 are clamped between the first positioning edges 531 and the groove walls 411 of the positioning grooves 41, and the other opposite two sides of the ejector pin 9 are clamped between the pressing frame 51 and the groove bottom of the positioning grooves 41, so that the ejector pin 9 is clamped in all directions to ensure the stability of clamping; the first fastener 7 is screwed into the jig seat 1, the push block 52 can push the first positioning edges 531 of the clamping slider 53 to be close to the groove walls 411 of the positioning grooves 41, and different cross-sectional area ejector pins 9 can be clamped by increasing or reducing the accommodation area; the pressing frame 51 can be pressed onto the positioning table 4 by a single first fastener 7, thereby reducing the number of screws, clamping a plurality of ejector pins 9 at one time, being applicable to the machining of ejector pins 9 with different cross-sectional areas, expanding the application range of the fixture, being conducive to the batch production of the ejector pins 9, and facilitating the replacement of the positioning table 4 and the clamping assembly, avoiding the scrapping of the entire fixture due to the failure of a single part, and reducing the use cost.

[0050] As can be understood, the first fastener 7 is screwed into the second through hole 42 of the positioning table 4 after passing through the first through hole 522 of the push block 52, and the clamping force of the first positioning edges 531 and the groove walls 411 on the ejector pin 9 can be adjusted by controlling the depth of the first fastener 7 screwed into the second through hole 42. For example, the first fastener 7 can include but is not limited to a screw, the first through hole 522 is a countersunk hole, and the second through hole 42 is provided with an internal thread.

[0051] Further, as shown in Figure 3 and Figure 7 , the clamping slider 53 is provided with two, and a first elastic member 54 is connected between each clamping slider 53 and the inner side wall of the pressing frame 51, the first elastic member 54 is used to make the two clamping sliders 53 close to each other, the push block 52 abuts against the two clamping sliders 53, and the push block 52 is used to push the clamping sliders 53 to move towards the positioning table 4 and along the second direction. When the ejector pin 9 needs to be clamped, the first fastener 7 is screwed into the jig seat 1 by forward screwing to achieve clamping of the ejector pin 9, at this time the first elastic member 54 is in a compressed state; after the machining is completed, the first fastener 7 is screwed out of the jig seat 1 by reverse screwing, and under the reaction force of the first elastic member 54, the two clamping sliders 53 are close to each other, the reset is completed, and the ejector pin 9 is released.

[0052] Further, please refer toFigure 14 The pushing block 52 is provided with a V-shaped slope, and a V-shaped space is formed between the two clamping sliding blocks 53. The pushing block 52 is arranged between the two clamping sliding blocks 53, and the slope of the pushing block 52 abuts against the slope of the clamping sliding block 53. When the first fastener 7 is screwed, the clamping sliding block 53 can be pushed to drive the pressing frame 51 to move towards the positioning table 4. The first positioning edge 531 and the groove wall 411 of the positioning groove 41 form an accommodation area, which can clamp the product (such as a ejector rod) in the accommodation area.

[0053] Further, the opposite two inner wall surfaces of the pressing frame 51 are each provided with a first guide protrusion 511 extending in the second direction. The opposite two outer wall surfaces of the clamping sliding block 53 are each concavely provided with a first guide sliding groove 533. The first guide protrusion 511 is slidingly arranged in the first guide sliding groove 533. By additionally providing the first guide protrusion 511 and the first guide sliding groove 533, it is ensured that the clamping sliding block 53 can only slide back and forth relative to the pressing frame 51 in the second direction.

[0054] In order to facilitate installation, the pressing frame is composed of two parts, which are a first frame body 57 and a second frame body 58 (see Figure 13 ). The first frame body 57 is in a flat plate structure, and the second frame body 58 is in a rectangular frame structure with one side open. The first frame body 57 is installed on the second frame body 58 to close the opening on the second frame body 58. A plurality of first connecting holes 514, a plurality of slot holes 512 and a plurality of circular holes 513 are arranged on the first frame body 57. A plurality of first connecting holes 514, a slot hole 512 and a circular hole 513 are arranged on the second frame body 58. The first frame body 57 is provided with a first guide protrusion 511 on the side facing the second frame body 58. The second frame body 58 is also provided with a first guide protrusion 511 on the side facing the first frame body 57. The two first guide protrusions 511 are vertically opposite to each other and are used to guide the clamping sliding block 53 to move in the second direction. Specifically, the first guide protrusion 511 is slidingly arranged in the first guide sliding groove 533 provided on the opposite two outer wall surfaces of the clamping sliding block 53. The first frame body 57 is provided with a butt joint groove 515 on the side facing the second frame body 58. The second frame body 58 is provided with a butt joint protrusion 516 on the side facing the first frame body 57. The butt joint protrusion 516 is inserted into the butt joint groove 515. The first frame body 57 is installed on the second frame body 58 by using a fourth fastener 517 (see Figure 12 and Figure 13 .

[0055] Further, the clamp further comprises a plurality of pressing heads 6. Each pressing head 6 comprises a field 61 and a cylindrical segment 62 connected to each other (see Figure 9The pressing head 6 is arranged on one side of the pressing frame 51 facing the positioning table 4 and can be extended or retracted relative to the pressing frame 51, and at least one pressing head 6 is arranged corresponding to each accommodating area. The pressing head 6 arranged on the pressing frame 51 is capable of being extended or retracted, and in the process of screwing the first fastener 7, the pressing frame 51 is moved towards the positioning table 4 along the third direction, so that the pressing head 6 is pressed towards the jack 9 located in the accommodating area, and the jack 9 is further pressed, thereby ensuring the stability of clamping the jack 9. In this embodiment, one pressing head 6 is arranged above and below each accommodating area (see FIG. 4). Figure 3

[0056] Further, the clamping assembly 5 further comprises a second elastic member 55 and a cover frame 56, and the pressing frame 51 is provided with a slit hole 512 and a circular hole 513 which are connected in communication, the cover frame 56 is mounted on the pressing frame 51 and blocks the circular hole 513, a field 61 of the pressing head 6 penetrates through the slit hole 512, a cylindrical segment 62 of the pressing head 6 penetrates through the circular hole 513, and the second elastic member 55 is arranged between the cylindrical segment 62 of the pressing head 6 and the cover frame 56. Since the field 61 of the pressing head 6 matches the slit hole 512, the pressing head 6 can only move along the third direction relative to the pressing frame 51, thereby avoiding rotation of the pressing head 6 relative to the pressing frame 51. By using the reaction force of the second elastic member 55, the clamping force of the pressing head 6 on the jack 9 is increased, thereby ensuring the stability of clamping the jack 9 by the clamp. In this embodiment, the second elastic member 55 can include but is not limited to a spring.

[0057] Further, the push block 52 penetrates through the cover frame 56 at the side opposite to the positioning table 4, and the push block 52 is slidably connected to the inner side wall of the cover frame 56 along the third direction, thereby ensuring that the push block 52 can only slide along the third direction relative to the cover frame 56, and further realizing clamping or loosening of the jack 9. Specifically, the inner wall surface of the cover frame 56 is protrudingly provided with a second guide protrusion extending along the third direction, and the outer wall surface of the push block 52 is recessed with a second guide sliding groove 521, and the second guide protrusion is slidably arranged in the second guide sliding groove 521.

[0058] Further, the side of the positioning table 4 facing the movable reference table 3 is recessed with a dovetail groove 43 extending along the second direction, and the side of the movable reference table 3 facing the positioning table 4 is protrudingly provided with a dovetail protrusion 31, the dovetail protrusion 31 is arranged in the dovetail groove 43, and the second fastener penetrates through the through hole 44 and is connected to the movable reference table 3. By adding the dovetail protrusion 31 and the dovetail groove 43, the position change of the positioning table 4 and the movable reference table 3 is limited, and the second fastener penetrates through the through hole 44 and is threadedly connected to the movable reference table 3, thereby further ensuring the stability of the connection between the positioning table 4 and the movable reference table 3.

[0059] In other embodiments, the positioning table 4 and the movable reference table 3 can also be an integrated structure, and the positioning groove 41 and the second through hole 42 are directly machined on the movable reference table 3, which is not limited in the present application. ​

[0060] Further, the pressing frame 51 is provided with a plurality of first connecting holes 514, and the cover plate frame 56 is provided with a plurality of second connecting holes 561, and the third fastener 8 is connected (for example, threaded connection) through the first connecting hole 514 and the second connecting hole 561. In this embodiment, the third fastener 8 can include but is not limited to a screw.

[0061] Further, the movable reference table 3 is provided with a guide column 32 extending in the first direction, and the jig seat 1 is provided with a guide hole 11, and one end of the guide column 32 relative to the movable reference table 3 is slidingly arranged in the guide hole 11. By adding the guide column 32 and the guide hole 11, since the guide column 32 extends in the first direction, it is used to guide the movable reference table 3 to slide relative to the jig seat 1 only in the first direction to adjust the height of the movable reference table 3 itself.

[0062] Exemplarily, the guide column 32 on the movable reference table 3 is provided with two, and the jig seat 1 is correspondingly provided with two guide holes 11, and the two guide columns 32 and the two guide holes 11 are correspondingly arranged. By increasing the number of guide columns 32 and guide holes 11, when adjusting the height in the first direction, the movable reference table 3 slides stably relative to the jig seat 1, so that the movable reference table 3 is balanced in force as a whole and does not deviate when moving.

[0063] Further, the movable reference table 3 is provided with a rack 33 extending in the first direction, the jig seat 1 is recessed with a first guide groove 12, one end of the rack 33 relative to the movable reference table 3 is slidingly arranged in the first guide groove 12, and the jig seat 1 is provided with a locking assembly 10, and the locking assembly 10 can be clamped with the rack 33, and is used to limit the distance between the movable reference table 3 and the base 2. The rack 33 extending in the first direction can reciprocate along the first guide groove 12, and when the movable reference table 3 with the rack 33 moves to a set position, the locking assembly 10 is clamped with the rack 33, so that the rack 33 cannot continue to move along the first guide groove 12, and the position of the rack 33 is ensured to be fixed, thereby improving the machining precision of the ejector rod 9. Only the distance between the movable reference table 3 and the base 2 needs to be adjusted once, and the position is limited by the locking assembly 10, so that when the same height ejector rod 9 is machined, it is not necessary to adjust the height repeatedly.

[0064] Further, the jig seat 1 is concavely provided with a second guide groove 13 extending along a third direction and communicating with the first guide groove 12, the locking assembly 10 comprises a third elastic member 101 and a positioning buckle 102, the positioning buckle 102 is slidingly arranged in the second guide groove 13, one end of the positioning buckle 102 extends out of the second guide groove 13 and is clamped with the rack 33, the other end of the positioning buckle 102 is provided with the third elastic member 101 between the other end and the groove bottom of the second guide groove 13, and the third elastic member 101 is used to move the positioning buckle 102 towards the rack 33. Since the third direction is perpendicular to the first direction, the extending direction of the first guide groove 12 is perpendicular to the extending direction of the second guide groove 13, the positioning buckle 102 is provided with corresponding teeth, the positioning buckle 102 can be transversely inserted between two adjacent teeth on the rack 33 along the third direction, and the movement of the rack 33 along the first direction is limited. The third elastic member 101 can include but is not limited to a spring. Understandably, a plurality of teeth can be arranged on the side of the positioning buckle 102 facing the rack 33, and when it is needed to lock the position of the rack, the plurality of teeth on the positioning buckle 102 are engaged with the plurality of teeth on the rack 33, so that the clamping between the positioning buckle 102 and the rack 33 is stable.

[0065] Further, the locking assembly 10 further comprises a handle 103 and a mounting plate 104, the mounting plate 104 is arranged at the groove opening of the second guide groove 13, the mounting plate 104 is provided with a third guide groove 1041 extending along the third direction, one end of the handle 103 is connected with the positioning buckle 102, and the other end of the handle 103 passes through the side wall of the third guide groove 1041 and is arranged outside the third guide groove 1041, so as to facilitate the handle to move the positioning buckle 102. When it is needed to re-adjust the height of the movable reference table 3, the positioning buckle 102 is disengaged from the rack 33 by moving the handle 103, so that the rack 33 can freely move along the first guide groove 12.

[0066] Based on the same inventive concept, the embodiment further provides a ejector pin preparation system, which comprises a grinding machine and the clamp in any one of the above embodiments, the clamp is used to clamp the ejector pin 9, the clamp clamped ejector pin 9 is in contact with the grinding machine, and the grinding machine is used to grind the ejector pin 9. Before grinding, the jig seat 1 is installed on the workbench by means of screws or bolts passing through the long hole 14 of the jig seat 1. The distance between the movable reference table 3 and the base 2 is adjusted, the first fastener 7 is screwed into the jig seat 1, different cross-sectional area ejector pins 9 are clamped by increasing or reducing the accommodating area, and the grinding machine grinds the ejector pin 9.

[0067] In a possible implementation, a target ejector pin can be machined to a required height, the target ejector pin is set as a reference, and other ejector pins are ground to obtain at least two ejector pins with the required height.

[0068] In this application, "vertical" does not mean absolutely vertical, and can allow certain engineering errors. "At least one" means one or more, and "multiple" means two or more. In the literal description of the application, the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship. In addition, in this application, the word "exemplary" is used to mean as an example, illustration, or description. Any embodiment or design scheme described as "exemplary" in this application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Or it can be understood that the use of the word "exemplary" is intended to present the concept in a specific way, and does not constitute a limitation on the application.

[0069] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not limitations on the embodiments of the present application. Those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the scope of the present application. It is unnecessary and impossible to enumerate all the embodiments here. Any modification, equivalent substitution and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A clamp for clamping a ejector rod (9), characterized in that The utility model relates to a kind of fixture, including: Jig base (1), the opposite ends of the jig base (1) are equipped with base (2) and movable reference table (3), the movable reference table (3) can be moved along the first direction relative to the jig base (1), the side of the base (2) towards movable reference table (3) is provided with limit surface (21), the first end of a plurality of the top rod (9) is abutted on the limit surface (21); Positioning table (4) is installed on the movable reference table (3), and the positioning table (4) is spaced apart and provided with a plurality of positioning grooves (41) along the second direction; Clamping assembly (5) includes pressing frame (51) and push block (52), the pressing frame (51) is equipped with clamping slider (53) capable of sliding along the second direction, the side of the clamping slider (53) towards the positioning table (4) is spaced apart and provided with a plurality of first positioning edges (531) along the second direction, the push block (52) is connected with the positioning table (4) by first fastener (7) so that the first positioning edge (531) and the groove wall (411) of the positioning groove (41) form containing area, the tail end of the top rod (9) passes through the containing area, and the first fastener (7) is used to adjust the spacing of the first positioning edge (531) and the groove wall (411) of the positioning groove (41);The clamping slider (53) is provided with two, and each clamping slider (53) is connected with the inner side wall of the pressing frame (51) by first elastic member (54), and the first elastic member (54) is used to make two clamping sliders (53) close to each other, the push block (52) is abutted with two clamping sliders (53), and the push block (52) is used to push the clamping slider (53) and move along the second direction towards the positioning table (4); The clamp further includes a plurality of pressing heads (6), the pressing head (6) is provided on the side of the pressing frame (51) towards the positioning table (4) and can extend or retract relative to the pressing frame (51), and at least one pressing head (6) is provided in each containing area.

2. The clamp of claim 1, wherein The inner wall of the pressing frame (51) is provided with first guide protrusion (511) extending along the second direction, and the first guide protrusion (511) is slidably arranged in the first guide sliding groove (533) on the clamping slider (53).

3. The clamp of claim 1, wherein The clamping assembly (5) further includes second elastic member (55) and cover frame (56), the pressing frame (51) is provided with a slit hole (512) and a circular hole (513) in communication, the cover frame (56) is installed on the pressing frame (51) and blocks the circular hole (513), a field (61) of the pressing head (6) is provided in the slit hole (512), a cylindrical segment (62) of the pressing head (6) is provided in the circular hole (513), and the second elastic member (55) is pressed between the cylindrical segment (62) and the cover frame (56).

4. The clamp of claim 3, wherein The end of the push block (52) opposite to the positioning table (4) penetrates through the cover frame (56), and the push block (52) is in sliding connection with the inner side wall of the cover frame (56) along a third direction.

5. The clamp of claim 1, wherein A side of the positioning table (4) facing the movable reference table (3) is concave and provided with a dovetail groove (43) extending along a second direction, and a side of the movable reference table (3) facing the positioning table (4) is convex and provided with a dovetail protrusion (31), the dovetail protrusion (31) is arranged in the dovetail groove (43), and a second fastener penetrates through a through hole (44) and is connected with the movable reference table (3).

6. The clamp of any one of claims 1-5, wherein, The movable reference table (3) is provided with a guide column (32) extending along a first direction, and the jig seat (1) is provided with a guide hole (11), and one end of the guide column (32) opposite to the movable reference table (3) is slidingly arranged in the guide hole (11).

7. The clamp of claim 6, wherein The movable reference table (3) is provided with a rack (33) extending along a first direction, the jig seat (1) is concave and provided with a first guide groove (12), one end of the rack (33) opposite to the movable reference table (3) is slidingly arranged in the first guide groove (12), and the jig seat (1) is provided with a locking assembly (10), the locking assembly (10) is in clamping connection with the rack (33), and is used for limiting the distance between the movable reference table (3) and the base (2).

8. The clamp of claim 7, wherein, The jig seat (1) is concave and provided with a second guide groove (13) extending along a third direction and in communication with the first guide groove (12), the locking assembly (10) comprises a third elastic member (101) and a positioning buckle (102), the second guide groove (13) is slidingly provided with the positioning buckle (102), one end of the positioning buckle (102) extends out of the second guide groove (13) and is in clamping connection with the rack (33), and the other end of the positioning buckle (102) is provided with the third elastic member (101) between the other end and the groove bottom of the second guide groove (13), and the third elastic member (101) is used for moving the positioning buckle (102) towards the rack (33).

9. The clamp of claim 8, wherein, The locking assembly (10) further comprises a handle (103) and a mounting plate (104), the mounting plate (104) is arranged at the groove opening of the second guide groove (13), the mounting plate (104) is provided with a third guide groove (1041) extending along a third direction, one end of the handle (103) is connected with the positioning buckle (102), and the other end of the handle (103) penetrates through the side wall of the third guide groove (1041) and is arranged on the outside of the third guide groove (1041).

10. A knockout pin manufacturing system, comprising: The jig comprises a grinding machine and a clamp according to any one of claims 1-9, the clamp is used for clamping a ejector rod (9), the ejector rod (9) clamped by the clamp is in contact with the grinding machine, and the grinding machine is used for grinding the ejector rod (9).

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