A batch cutting and grinding jig for ejector pins
By designing a batch cutting and grinding fixture for ejector pins, and utilizing a combination of limit guide rods and clamping plates, stable clamping of ejector pins and batch cutting and grinding are achieved, solving the problem of low efficiency in cutting and grinding ejector pins one by one, and improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN YULONGXIN TECH CO LTD
- Filing Date
- 2025-08-26
- Publication Date
- 2026-05-29
AI Technical Summary
Cutting and grinding each ejector pin individually during the production process is inefficient and cannot meet the needs of mass production.
Design a jig for batch cutting and grinding of ejector pins, including a support plate, a front clamping member and a rear clamping member. By using a combination of limit guide rods and clamping plates, the ejector pins can be stably clamped, and the jig can be placed in different directions to achieve batch cutting and grinding.
It improves the cutting and grinding efficiency of the ejector pin, reduces the deformation of the ejector pin, and improves production efficiency.
Smart Images
Figure CN224295598U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ejector clamp technology, specifically a clamp for batch cutting and grinding of ejector pins. Background Technology
[0002] Ejector pins require cutting and grinding during production. Cutting and grinding each pin individually is inefficient and cannot meet production demands. Therefore, there is an urgent need for batch cutting and grinding of ejector pins. Existing cutting and grinding discs can meet the needs of batch cutting and grinding, and the basis for achieving batch cutting and grinding is the clamping of a batch of ejector pins. To improve cutting and grinding efficiency, this utility model provides a fixture for batch cutting and grinding of ejector pins. Utility Model Content
[0003] To address the aforementioned technical shortcomings, the purpose of this utility model is to provide a jig for batch cutting and grinding of ejector pins. When the jig is placed horizontally, the cutting disc enables batch cutting, improving cutting efficiency. When the jig is placed vertically, batch grinding is performed with high grinding efficiency, thus solving the technical problems mentioned in the background art.
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a fixture for batch cutting and grinding of ejector pins, comprising: a support plate, a front clamping member, and a rear clamping member. Limiting guide rods that slide vertically are symmetrically installed on both sides of the support plate. The rear clamping member includes a crossbar and two U-shaped clamping plates. The crossbar is slidably installed at the rear between the two limiting guide rods, and the two U-shaped clamping plates are symmetrically installed on the upper and lower sides of the crossbar. When the side plates of the U-shaped clamping plates are fastened to the limiting guide rods with screws, ejector pins are clamped between the bottom plate of the U-shaped clamping plates and the upper and lower surfaces of the crossbar. The front clamping member includes an I-shaped rod and two horizontal clamping plates. The I-shaped rod is slidably installed at the front between the two limiting guide rods, and the two horizontal clamping plates are symmetrically installed on the upper and lower sides of the I-shaped rod. When the two ends of the horizontal clamping plates are fastened to the vertical rod of the I-shaped rod with screws, ejector pins are clamped between the horizontal clamping plates and the horizontal part of the I-shaped rod.
[0005] Preferably, the crossbar has several first toothed grooves evenly distributed along its length on both its upper and lower sides, and the U-shaped clamp has several second toothed grooves evenly distributed along its length on its inner side, corresponding to the first toothed grooves. When the bottom plate of the U-shaped clamp and the crossbar clamp the ejector pins, the ejector pins are clamped in the first and second toothed grooves. The crossbar has several third toothed grooves evenly distributed along its length on its side, and the I-shaped rod has several fourth toothed grooves evenly distributed along its length on both its upper and lower sides, corresponding to the third toothed grooves. When the crossbar and the I-shaped rod clamp the ejector pins, the ejector pins are clamped in the third and fourth toothed grooves. By clamping the ejector pins in the first and second toothed grooves, and in the third and fourth toothed grooves, relative sliding is avoided, ensuring that the ejector pins are stably clamped in a row.
[0006] Preferably, symmetrical receiving slots are opened on both sides of the horizontal clamping plate, so that a protrusion is formed in the middle of the horizontal clamping plate. The two ends of the vertical rod of the I-shaped rod are installed in the receiving slots. Several third toothed grooves are located on the side of the protrusion. When the ejector pin is clamped between the bottom plate of the U-shaped clamping plate and the horizontal rod, the protrusion is installed between the two vertical rods of the I-shaped rod. The receiving slots are used to ensure that the protrusion and the horizontal rod of the I-shaped rod can clamp the ejector pin.
[0007] Preferably, two first strip-shaped limiting grooves extending vertically are symmetrically formed on both sides of the side edge of the support plate. The cross-section of the first strip-shaped limiting groove is trapezoidal and the width increases from the outside to the inside. The ends of the two limiting guide rods are integrally provided with a first trapezoidal limiting block. The side plate of the U-shaped clamp is integrally provided with a second trapezoidal limiting block on the side of the support plate. The first trapezoidal limiting block and the second trapezoidal limiting block are slidably matched and installed in the strip-shaped limiting groove, so as to realize the sliding installation of the U-shaped clamp and the limiting guide rod on the side of the support plate, which facilitates the installation of the ejector pin.
[0008] Preferably, the bottom plate of the U-shaped clamp has a first strip-shaped clearance slot on the side near the support plate, and the crossbar has a second strip-shaped clearance slot on the side near the support plate; when the ejector pin is clamped, the wide column head at the root of the ejector pin is located in the first strip-shaped clearance slot and the second strip-shaped clearance slot, so as to ensure convenient installation and stable clamping of the ejector pin.
[0009] Preferably, the inner side of the limiting guide rod is provided with a second strip-shaped limiting groove extending along the length direction. The cross-section of the second strip-shaped limiting groove is trapezoidal and the width increases from the outside to the inside. The two ends of the crossbar are symmetrically provided with third trapezoidal limiting blocks. The third trapezoidal limiting blocks are slidably installed in the second strip-shaped limiting groove to facilitate the relative movement and disassembly of the rear clamping parts, so as to install and clamp the ejector pin.
[0010] Preferably, a limiting groove is provided on the outer side of the vertical rod of the I-shaped rod, and the front part of the limiting guide rod is slidably installed in the limiting groove. The side of the limiting groove is integrally connected to a fourth trapezoidal limiting block, and the fourth trapezoidal limiting block is slidably installed in the second strip-shaped limiting groove to ensure the stable connection and relative sliding of the front clamping member. By adjusting the position of the front clamping member on the limiting guide rod, the length of the ejector pin being cut can be precisely adjusted, which is convenient and practical.
[0011] Preferably, when batch cutting the ejector pins, the support plate is placed vertically on the upper surface of the magnetic suction table, and the U-shaped clamping plate and the horizontal clamping plate below are placed horizontally on the upper surface of the magnetic suction table. That is, the fixture is placed horizontally. When cutting rows of ejector pins, the cutting disc moves back and forth along the horizontal arrangement direction of the ejector pins. The cutting depth of each reciprocating cutting disc gradually increases. Compared with longitudinal cutting of a single ejector pin, the deformation of the ejector pin cutting end face is lower, reducing grinding time and improving grinding efficiency. Batch cutting improves cutting efficiency. When batch grinding the ejector pins, only the support plate is placed horizontally on the upper surface of the magnetic suction table. That is, the fixture is placed vertically. Batch grinding has high grinding efficiency. Each component of the fixture is made of steel and can be stably attracted and placed on the magnetic suction table, maintaining stability.
[0012] The beneficial effects of this utility model are as follows:
[0013] 1. When the fixture of this utility model is placed horizontally, the cutting disc can perform batch cutting, improving cutting efficiency; when the fixture is placed vertically, it can perform batch grinding, with high grinding efficiency; in addition, the rows of fixed ejector pins provide a cutting basis for the horizontal reciprocating cutting of the cutting disc, indirectly achieving the benefit of lower deformation of the ejector pin cutting end face, reducing grinding time, and indirectly improving grinding efficiency.
[0014] 2. This utility model prevents relative sliding and ensures stable clamping of the ejector pins in a row by clamping the ejector pins in the first and second tooth grooves, and in the third and fourth tooth grooves.
[0015] 3. The front part of the limiting guide rod of this utility model is slidably installed in the limiting groove, and the fourth trapezoidal limiting block is slidably installed in the second strip-shaped limiting groove, ensuring the stable connection and relative sliding of the front clamping part. By adjusting the position of the front clamping part on the limiting guide rod, the length of the ejector pin being cut can be precisely adjusted, which is convenient and practical. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of a jig for batch cutting of a pin in this utility model.
[0018] Figure 2 for Figure 1 A schematic diagram of the structure without the ejector pin installed.
[0019] Figure 3 for Figure 3 A schematic diagram showing the structure without one of the limiting guide rods, one U-shaped clamp, and one horizontal clamp installed.
[0020] Figure 4 This is a schematic diagram of the limiting guide rod in this utility model.
[0021] Figure 5 This is a schematic diagram of the U-shaped clamp in this utility model.
[0022] Figure 6 This is a schematic diagram of the crossbar structure in this utility model.
[0023] Figure 7 This is a schematic diagram of the horizontal clamping plate in this utility model.
[0024] Figure 8 This is a schematic diagram of the structure of the I-shaped rod in this utility model.
[0025] Figure 9 This is a schematic diagram of the structure of a jig for batch grinding of ejector pins according to this utility model.
[0026] Explanation of reference numerals in the attached drawings: 1-Support plate, 11-First strip-shaped limiting groove, 2-Limiting guide rod, 21-First trapezoidal limiting block, 22-Second strip-shaped limiting groove, 31-Horizontal bar, 311-Second strip-shaped clearance slot, 312-Third trapezoidal limiting block, 32-U-shaped clamping plate, 321-Second trapezoidal limiting block, 322-First strip-shaped clearance slot, 41-I-shaped rod, 411-Limiting groove, 412-Fourth trapezoidal limiting block, 42-Horizontal clamping plate, 421-Accommodation slot, 5-Screw, 6-Ejector pin, 7-Magnetic suction table. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] Example 1:
[0029] like Figures 1 to 8 As shown, this embodiment provides a fixture for batch cutting and grinding of ejector pins, including: a support plate 1, a front clamping member, and a rear clamping member. Limiting guide rods 2, which slide vertically, are symmetrically installed on both sides of the support plate 1. The rear clamping member includes a horizontal bar 31 and two U-shaped clamping plates 32. The horizontal bar 31 is slidably installed at the rear between the two limiting guide rods 2, and the two U-shaped clamping plates 32 are symmetrically installed on the upper and lower sides of the horizontal bar 31. When the side plates of the U-shaped clamping plates 32 are fastened to the limiting guide rods 2 by screws 5, the ejector pins 6 are clamped between the bottom plate of the U-shaped clamping plates 32 and the upper and lower surfaces of the horizontal bar 31. The front clamping member includes an I-shaped rod 41 and two horizontal clamping plates 42. The I-shaped rod 41 is slidably installed at the front between the two limiting guide rods 2, and the two horizontal clamping plates 42 are symmetrically installed on the upper and lower sides of the I-shaped rod 41. When the two ends of the horizontal clamping plates 42 are fastened to the vertical rods of the I-shaped rod 41 by screws 5, the horizontal clamping plates 42 and the horizontal rods of the I-shaped rod 41 clamp the ejector pins 6. For further details, please refer to Figure 1 and Figure 9 As shown, when batch cutting the ejector pins 6, the support plate 1 is placed vertically on the upper surface of the magnetic suction table 7, and the U-shaped clamping plate 32 and the horizontal clamping plate 42 located below are placed horizontally on the upper surface of the magnetic suction table 7. That is, the fixture is placed horizontally. When cutting the rows of ejector pins, the cutting disc moves back and forth along the horizontal arrangement direction of the ejector pins. The cutting depth of each reciprocating cutting disc gradually increases. Compared with longitudinal cutting of a single ejector pin, the deformation of the ejector pin cutting end face is lower, reducing grinding time and improving grinding efficiency. Batch cutting improves cutting efficiency. When batch grinding the ejector pins 6, only the support plate 1 is placed horizontally on the upper surface of the magnetic suction table 7. That is, the fixture is placed vertically. Batch grinding has high grinding efficiency. Each component of the fixture is made of steel and can be stably attracted and placed on the magnetic suction table 7 to maintain stability.
[0030] For further details, please refer to Figure 2 and Figure 3 As shown, several first toothed grooves are evenly distributed along the length direction on both the upper and lower sides of the crossbar 31. Several second toothed grooves corresponding to the first toothed grooves are evenly distributed along the length direction on the inner side of the bottom plate of the U-shaped clamping plate 32. When the bottom plate of the U-shaped clamping plate 32 and the crossbar 31 clamp the ejector pin 6, the ejector pin 6 is clamped in both the first and second toothed grooves. Several third toothed grooves are evenly distributed along the length direction on the side of the crossbar 42. Several fourth toothed grooves corresponding to the third toothed grooves are evenly distributed along the length direction on both the upper and lower sides of the crossbar portion of the I-shaped rod 41. When the crossbar 42 and the crossbar portion of the I-shaped rod 41 clamp the ejector pin 6, the ejector pin 6 is clamped in the third and fourth toothed grooves. By clamping the ejector pin 6 in the first and second toothed grooves, and clamping the ejector pin 6 in the third and fourth toothed grooves, relative sliding is avoided, ensuring that the ejector pins 6 are stably clamped in a row. For further details, please refer to [link to relevant documentation]. Figure 7As shown, symmetrical receiving slots 421 are opened on both sides of the horizontal clamping plate 42 to receive the vertical rods of the I-shaped rod 41, so that a protrusion is formed in the middle of the horizontal clamping plate 42. The two ends of the vertical rods of the I-shaped rod 41 are installed in the receiving slots 421. Several third toothed grooves are located on the side of the protrusion. When the horizontal clamping plate 42 and the horizontal rod of the I-shaped rod 41 clamp the ejector pin 6, the protrusion is installed between the two vertical rods of the I-shaped rod 41. The receiving slots 421 are used to ensure that the protrusion and the horizontal rod of the I-shaped rod 41 can clamp the ejector pin 6.
[0031] For further details, please refer to Figures 2 to 4 As shown, two vertically extending first strip-shaped limiting grooves 11 are symmetrically opened on both sides of the support plate 1. The cross-section of the first strip-shaped limiting groove 11 is trapezoidal and the width increases from the outside to the inside. The ends of the two limiting guide rods 2 are integrally provided with first trapezoidal limiting blocks 21. The side plate of the U-shaped clamp 32 near the side of the support plate 1 is integrally provided with second trapezoidal limiting blocks 321. The first trapezoidal limiting blocks 21 and the second trapezoidal limiting blocks 321 are slidably matched and installed in the strip-shaped limiting grooves 11, so as to realize the sliding installation of the U-shaped clamp 32 and the limiting guide rods 2 on the side of the support plate 1, which facilitates the installation of the ejector pin 6.
[0032] For further details, please refer to Figure 5 and Figure 6 As shown, the bottom plate of the U-shaped clamping plate 32 has a first strip-shaped clearance slot 322 on the side near the support plate 1, and the crossbar 31 has a second strip-shaped clearance slot 311 on the side near the support plate 1. When the ejector pin 6 is clamped, the wide column head at the root of the ejector pin 6 is located in the first strip-shaped clearance slot 322 and the second strip-shaped clearance slot 311, so as to ensure convenient installation and stable clamping of the ejector pin 6.
[0033] For further details, please refer to Figure 4 As shown, a second strip-shaped limiting groove 22 extending along the length direction is formed on the inner side of the limiting guide rod 2. The cross-section of the second strip-shaped limiting groove 22 is trapezoidal, and its width increases from the outside to the inside. A third trapezoidal limiting block 312 is symmetrically provided at both ends of the crossbar 31. The third trapezoidal limiting block 312 is slidably installed in the second strip-shaped limiting groove 22, facilitating the relative movement and disassembly of the rear clamping member, so as to install and clamp the ejector pin 6. Further details can be found in the following section. Figure 7 and Figure 8 As shown, a limiting slot 411 is opened on the outer side of the vertical rod of the I-shaped rod 41. The front part of the limiting guide rod 2 is slidably installed in the limiting slot 411. The side of the limiting slot 411 is integrally connected to the fourth trapezoidal limiting block 412. The fourth trapezoidal limiting block 412 is slidably installed in the second strip-shaped limiting groove 22 to ensure the stable connection and relative sliding of the front clamping member. By adjusting the position of the front clamping member on the limiting guide rod 2, the length of the ejector pin 6 being cut can be precisely adjusted, which is convenient and practical.
[0034] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A fixture for batch cutting and grinding of ejector pins, characterized in that, include: Support plate (1), front clamping member and rear clamping member, wherein limiting guide rods (2) that slide in the vertical direction are symmetrically installed on both sides of the side edge of the support plate (1); The rear clamping component includes a crossbar (31) and two U-shaped clamping plates (32). The crossbar (31) is slidably installed at the rear between the two limiting guide rods (2), and the two U-shaped clamping plates (32) are symmetrically installed on the upper and lower sides of the crossbar (31). When the side plate of the U-shaped clamping plate (32) is fastened to the limiting guide rod (2) by screws (5), the bottom plate of the U-shaped clamping plate (32) and the upper and lower surfaces of the crossbar (31) clamp the ejector pin (6). The front clamping component includes an I-shaped rod (41) and two horizontal clamping plates (42). The I-shaped rod (41) is slidably installed at the front between the two limiting guide rods (2), and the two horizontal clamping plates (42) are symmetrically installed on the upper and lower sides of the I-shaped rod (41). When the two ends of the horizontal clamping plates (42) are fastened to the vertical rod of the I-shaped rod (41) by screws (5), the horizontal clamping plates (42) and the horizontal rod of the I-shaped rod (41) clamp the ejector pin (6).
2. The fixture for batch cutting and grinding of ejector pins as described in claim 1, characterized in that, The crossbar (31) has several first toothed grooves evenly distributed along its length on both its upper and lower sides. The bottom plate of the U-shaped clamp (32) has several second toothed grooves evenly distributed along its length on its inner side, corresponding to the first toothed grooves. When the bottom plate of the U-shaped clamp (32) and the crossbar (31) clamp the ejector pin (6), the ejector pin (6) is clamped in both the first toothed groove and the second toothed groove. The horizontal clamping plate (42) has several third toothed grooves evenly distributed along its length on its side. The crossbar of the I-shaped rod (41) has several fourth toothed grooves evenly distributed along its length on its upper and lower sides, corresponding to the third toothed grooves. When the horizontal clamping plate (42) and the crossbar of the I-shaped rod (41) clamp the ejector pin (6), the ejector pin (6) is clamped in the third toothed groove and the fourth toothed groove.
3. The fixture for batch cutting and grinding of ejector pins as described in claim 2, characterized in that, The two ends of the horizontal clamping plate (42) are symmetrically provided with receiving slots (421), so that the middle part of the horizontal clamping plate (42) forms a protrusion. The two ends of the vertical rod of the I-shaped rod (41) are installed in the receiving slots (421). Several third toothed grooves are located on the side of the protrusion. When the horizontal clamping plate (42) and the horizontal rod of the I-shaped rod (41) clamp the ejector pin (6), the protrusion is installed between the two vertical rods of the I-shaped rod (41).
4. The fixture for batch cutting and grinding of ejector pins as described in claim 1, characterized in that, The support plate (1) has two vertically extending first strip-shaped limiting grooves (11) symmetrically opened on both sides of its side edge. The first strip-shaped limiting groove (11) has a trapezoidal cross-section and its width increases from the outside to the inside. The ends of the two limiting guide rods (2) are integrally provided with first trapezoidal limiting blocks (21). The side plate of the U-shaped clamp (32) is integrally provided with a second trapezoidal limiting block (321) on the side of the support plate (1). The first trapezoidal limiting block (21) and the second trapezoidal limiting block (321) are slidably matched and installed in the strip-shaped limiting groove (11).
5. The fixture for batch cutting and grinding of ejector pins as described in claim 1, characterized in that, The bottom plate of the U-shaped clamp (32) has a first strip-shaped clearance slot (322) on the side near the support plate (1), and the crossbar (31) has a second strip-shaped clearance slot (311) on the side near the support plate (1); when the ejector pin (6) is clamped, the root of the ejector pin (6) is located in the first strip-shaped clearance slot (322) and the second strip-shaped clearance slot (311).
6. The fixture for batch cutting and grinding of ejector pins as described in claim 1, characterized in that, The inner side of the limiting guide rod (2) is provided with a second strip-shaped limiting groove (22) extending along the length direction. The cross section of the second strip-shaped limiting groove (22) is trapezoidal and the width increases from the outside to the inside. The two ends of the cross rod (31) are symmetrically provided with third trapezoidal limiting blocks (312). The third trapezoidal limiting blocks (312) are slidably installed in the second strip-shaped limiting groove (22).
7. The fixture for batch cutting and grinding of ejector pins as described in claim 6, characterized in that, The vertical side of the I-shaped rod (41) is provided with a limiting slot (411). The front part of the limiting guide rod (2) is slidably installed in the limiting slot (411). The side of the limiting slot (411) is integrally connected to the fourth trapezoidal limiting block (412). The fourth trapezoidal limiting block (412) is slidably installed in the second strip-shaped limiting groove (22).
8. The fixture for batch cutting and grinding of ejector pins as described in claim 1, characterized in that, When the ejector pins (6) are cut in batches, the support plate (1) is placed vertically on the upper surface of the magnetic suction table (7), and the U-shaped clamping plate (32) and the horizontal clamping plate (42) located below are placed horizontally on the upper surface of the magnetic suction table (7); when the ejector pins (6) are polished in batches, only the support plate (1) is placed horizontally on the upper surface of the magnetic suction table (7).