Punch assembly for precision die

Abstract

The utility model relates to the technical field of punch components, and provides a punch component for a precision die, which comprises a mounting seat and a fixing structure, a mounting groove is arranged at the bottom end of the mounting seat, a punch seat is mounted in the mounting groove, and a punch rod is fixed at the bottom end of the punch seat. By arranging the fixing structure, the threaded rods drive the fixing plates to get close to each other to clamp and fix the punch seat by rotating the fixing blocks, the guide rods are driven by the movement of the fixing plates to enable the limiting blocks to slide in the limiting grooves to compress the third springs, and through the elastic effect of the third springs, the punch seat is clamped and fixed. According to the clamping device, the stability in the clamping process can be ensured, the structural integrity of the die and the punch assembly is protected, the service life is prolonged, the clamping force of the threaded rod can be adjusted through the third spring, it is ensured that the clamping force is moderate, and the situation that the punch base is damaged due to too tight clamping and unstable clamping due to too loose clamping is avoided.

Description

Technical Field

[0001] This utility model relates to the field of punch assembly technology, and in particular to a punch assembly for precision molds. Background Technology

[0002] Punch assemblies are a crucial part of molds, mainly composed of punches, guide pillars, guide bushings, and other accessories. They are widely used in various mold processing fields, such as hardware molds, plastic molds, and die-casting molds. They play a vital role in these fields, ensuring the quality and precision of stamped parts. A precision mold punch assembly, including an inner punch, lead screw, guide pillars, and an outer punch plate, can achieve switching between multiple punch diameters, is easy to replace, and saves maintenance costs.

[0003] To address this, patent CN206104654U discloses a precision mold punch, comprising a moving mold and a fixed mold. A limit plate is connected to the lower surface of the moving mold, and a punch is connected to the lower surface of the limit plate. The upper surface of the fixed mold has a groove for accommodating the limit plate, and a through hole for the punch to pass through the groove. A first limiting tooth is provided on the upper surface of the groove, and a second limiting tooth, meshing with the first limiting tooth, is provided on the lower surface of the limit plate. This utility model provides a precision mold punch that is less prone to wobbling, has precise punching positions, and allows for easy replacement of the cutting edge at low cost.

[0004] In the aforementioned precision mold punch, the punch and moving mold are actually fixedly connected during use. Although the punch block can be disassembled and replaced, the punch is prone to wear after prolonged use, making it inconvenient to disassemble the punch separately when replacement is needed. In addition, the punch is fixed by the engagement of limiting teeth, which also generates friction with the punch while fixing it. Over time, this may damage the mold, accelerate mold wear, and shorten the mold's service life. Utility Model Content

[0005] The purpose of this invention is to provide a punch assembly for precision molds, which solves the problem that existing punch assemblies for precision molds are not conducive to reducing wear between punches.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a punch assembly for precision molds, including a mounting base and a fixing structure;

[0007] The mounting base has a mounting groove at its bottom end, a punch seat is installed inside the mounting groove, a punch rod is fixed at the bottom end of the punch seat, and a positioning structure is fixed at the top end of the punch seat inside the mounting base.

[0008] The mounting base has fixing structures installed on both sides inside. Each fixing structure includes threaded rods installed on both sides of the mounting base. One end of each threaded rod is fixed to a fixing block. The other end of each threaded rod is movably connected to a fixing plate inside the mounting groove. The other end of each threaded rod is fixed to a rotating block. A rotating groove is provided inside the fixing plate outside the rotating block. Guide rods are fixed on both sides of the fixing plate. Limit grooves are provided on both sides inside the mounting base. A limit block is fixed to one end of the guide rod inside the limit groove. A third spring is installed on the outside of the guide rod inside the limit groove.

[0009] Preferably, the positioning structure includes a positioning groove disposed inside the mounting base at the top of the mounting groove, a positioning block fixed at the middle position of the top of the punch seat, a first built-in groove disposed inside the mounting base at the top of the positioning groove, a first spring fixed inside the first built-in groove, a pressure plate fixed at one end of the first spring, a second built-in groove disposed on both sides of the positioning groove, a second spring fixed inside the second built-in groove, a locking block fixed at one end of the second spring, and a locking groove disposed inside the positioning block outside the locking block.

[0010] Preferably, the positioning groove is fitted with the positioning block, the bottom end of the pressure plate abuts against the top end of the positioning block, and the pressure plate and the first built-in groove form a telescopic structure through a first spring.

[0011] With the above structure, when the punch assembly is disassembled during use, the pressure plate pushes the positioning block out of the positioning groove under the elastic force of the first spring, which facilitates the quick replacement of the punch assembly and improves its practicality during use.

[0012] Preferably, the second built-in slots are symmetrically distributed on both sides of the positioning slot, the locking block and the second built-in slot form a telescopic structure through the second spring, the locking block and the positioning block form a locking structure through the locking slot, and the locking block is tapered.

[0013] With the above structure, during use, the second spring's elastic force causes the locking block to insert into the slot and limit the positioning block, thereby positioning the punch seat inside the mounting slot, which facilitates the stability and accuracy of the punch assembly during the stamping process.

[0014] Preferably, the threaded rods are symmetrically distributed on both sides of the mounting base, and the threaded rods are threadedly connected to the mounting base respectively. The fixing plate is L-shaped, and the rotating block is rotatably connected to the fixing plate through a rotating groove. The cross-section of the rotating block is T-shaped.

[0015] With the above structure, the fixing plate can clamp and fix the punch seat during use, which improves the stability of fixing the punch seat, and the rotation of the threaded rod can drive the fixing plate to move, thereby ensuring the stability of the fixing plate when moving.

[0016] Preferably, the guide rods are symmetrically distributed on both sides of the threaded rod on one side of the fixed plate, and one end of the guide rod extends through one side of the mounting groove into the interior of the limiting groove.

[0017] With the above structure, the guide rod slides inside the limiting groove during use, which further improves the stability of the fixed plate when it moves, thereby ensuring the clamping effect of the fixed plate.

[0018] Preferably, the guide rod and the limiting groove form a limiting structure through a limiting block, and the guide rod and the limiting groove form a telescopic structure through a third spring.

[0019] The above structure, combined with the elastic action of the third spring, ensures stability during clamping, protects the structural integrity of the mold and punch assembly, and extends service life.

[0020] The advantages of the punch assembly for precision molds provided by this utility model are as follows:

[0021] By incorporating a positioning structure, the positioning block is inserted into the positioning groove, which in turn compresses the pressure plate, causing the first spring to be compressed. Simultaneously, the locking block is inserted into the locking groove under the elastic force of the second spring, thus facilitating the positioning of the positioning block and positioning the punch seat inside the mounting groove. This improves the stability and accuracy of the punch assembly during the stamping process. Furthermore, when the punch assembly needs to be disassembled, the pressure plate pushes the positioning block out of the positioning groove under the elastic force of the first spring, facilitating the quick replacement of the punch assembly and enhancing its practicality.

[0022] By setting up a fixed structure, rotating the fixed blocks causes the threaded rods to move the fixed plates closer together, clamping and fixing the punch seat. The movement of the fixed plates then drives the guide rods, causing the limiting blocks to slide inside the limiting grooves and compress the third spring. The elasticity of the third spring ensures stability during clamping, protects the structural integrity of the mold and punch assembly, extends service life, and allows adjustment of the clamping force of the threaded rods, ensuring that the clamping force is moderate, neither too tight and damaging to the punch seat, nor too loose and unstable. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0025] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0026] Figure 4 This is a three-dimensional structural diagram of the punch holder of this utility model;

[0027] Figure 5 This is a three-dimensional structural diagram of the fixed structure of this utility model.

[0028] The reference numerals in the diagram are as follows: 1. Mounting base; 2. Mounting groove; 3. Punch seat; 4. Punch rod; 5. Positioning structure; 501. Positioning groove; 502. Positioning block; 503. First internal groove; 504. First spring; 505. Pressure plate; 506. Second internal groove; 507. Second spring; 508. Locking block; 509. Locking groove; 6. Fixing structure; 601. Threaded rod; 602. Fixing block; 603. Fixing plate; 604. Rotating block; 605. Rotating groove; 606. Guide rod; 607. Limiting groove; 608. Limiting block; 609. Third spring. Detailed Implementation

[0029] 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.

[0030] Please see Figure 1-5 The present invention provides a punch assembly for precision molds, including a mounting base 1 and a fixing structure 6.

[0031] Reference Figures 2-4As shown, the bottom of the mounting base 1 is provided with a mounting groove 2, and a punch seat 3 is installed inside the mounting groove 2. A punch rod 4 is fixed to the bottom of the punch seat 3. A positioning structure 5 is fixed to the top of the punch seat 3 inside the mounting base 1. The positioning structure 5 includes a positioning groove 501 set inside the mounting base 1 at the top of the mounting groove 2. A positioning block 502 is fixed at the middle position of the top of the punch seat 3. A first built-in groove 503 is provided inside the mounting base 1 at the top of the positioning groove 501. A first spring 504 is fixed inside the first built-in groove 503. A pressure plate 505 is fixed to one end of the first spring 504. A second built-in groove 506 is provided on both sides of the positioning groove 501. A second spring 507 is fixed inside the device. A locking block 508 is fixed to one end of the second spring 507. A locking groove 509 is provided inside the positioning block 502 on the outer side of the locking block 508. The positioning groove 501 is engaged with the positioning block 502. The bottom end of the pressing plate 505 abuts against the top end of the positioning block 502. The pressing plate 505 and the first built-in groove 503 form a telescopic structure through the first spring 504. The second built-in groove 506 is symmetrically distributed on both sides of the positioning groove 501. The locking block 508 and the second built-in groove 506 form a telescopic structure through the second spring 507. The locking block 508 and the positioning block 502 form a locking structure through the locking groove 509. The locking block 508 is conical.

[0032] By installing the punch holder 3 inside the mounting groove 2, the positioning block 502 is inserted into the positioning groove 501, thereby pressing the pressure plate 505 and compressing the first spring 504. Simultaneously, during the installation of the positioning block 502, the locking block 508, under the elastic force of the second spring 507, is inserted into the locking groove 509, thus limiting the positioning block 502. This positions the punch holder 3 inside the mounting groove 2, facilitating clamping and fixing by the fixing plate 603, thereby improving the stability and accuracy of the punch assembly during the stamping process. The punch assembly is designed to be quick and easy to replace, thus improving its usability. When the punch assembly needs to be disassembled, the fixing plate 603 stops clamping the punch seat 3. Pulling the punch rod 4 causes the punch seat 3 to move the positioning block 502 out of the positioning groove 501, causing the locking block 508 to slide out of the locking groove 509. This compresses the second spring 507, and under the elastic force of the first spring 504, the pressure plate 505 pushes the positioning block 502 out of the positioning groove 501.

[0033] Reference Figure 1 , Figure 2 and Figure 5As shown, fixing structures 6 are installed on both sides of the mounting base 1. Each fixing structure 6 includes a threaded rod 601 installed on both sides of the mounting base 1. A fixing block 602 is fixed to one end of each threaded rod 601. A fixing plate 603 is movably connected to the other end of the threaded rod 601 inside the mounting groove 2. A rotating block 604 is fixed to the other end of the threaded rod 601. A rotating groove 605 is provided inside the fixing plate 603 outside the rotating block 604. Guide rods 606 are fixed to both sides of the fixing plate 603. Limiting grooves 607 are provided on both sides of the mounting base 1. A limiting block 608 is fixed to one end of each guide rod 606 inside the limiting groove 607. A fixing block 608 is installed on the outside of each guide rod 606 inside the limiting groove 607. There is a third spring 609, and threaded rods 601 are symmetrically distributed on both sides of the mounting base 1. The threaded rods 601 are threadedly connected to the mounting base 1. The fixing plate 603 is L-shaped. The rotating block 604 is rotatably connected to the fixing plate 603 through the rotating groove 605. The cross section of the rotating block 604 is T-shaped. The guide rods 606 are symmetrically distributed on both sides of the threaded rods 601 on one side of the fixing plate 603. One end of the guide rod 606 passes through one side of the mounting groove 2 and extends into the interior of the limiting groove 607. The guide rod 606 and the limiting groove 607 form a limiting structure through the limiting block 608. The guide rod 606 and the limiting groove 607 form a telescopic structure through the third spring 609.

[0034] When the punch seat 3 is positioned inside the mounting groove 2, rotating the fixing block 602 causes the threaded rod 601 to move under the action of being threadedly connected to the mounting seat 1. This causes the two sets of fixing plates 603 to move closer to each other, clamping and fixing the punch seat 3. The movement of the fixing plate 603 drives the guide rod 606, causing the limiting block 608 to slide inside the limiting groove 607, compressing the third spring 609. The elasticity of the third spring 609 ensures stability during clamping, protects the structural integrity of the mold and punch assembly, extends service life, and allows the third spring 609 to adjust the clamping force of the threaded rod 601, ensuring that the clamping force is moderate, neither too tight and damaging to the punch seat 3, nor too loose and unstable.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A punch assembly for precision molds, comprising a mounting base (1) and a fixing structure (6); Its features are: The mounting base (1) has a mounting groove (2) at its bottom end. A punch seat (3) is installed inside the mounting groove (2). A punch rod (4) is fixed at the bottom end of the punch seat (3). A positioning structure (5) is fixed at the top end of the punch seat (3) inside the mounting base (1). The mounting base (1) has a fixing structure (6) installed on both sides inside. The fixing structure (6) includes a threaded rod (601) installed on both sides of the mounting base (1). One end of the threaded rod (601) is fixed with a fixing block (602). The other end of the threaded rod (601) inside the mounting groove (2) is movably connected with a fixing plate (603). The other end of the threaded rod (601) is fixed with a rotating block (604). The rotating block (604) is surrounded by a rotating groove (605) inside the fixing plate (603). Both sides of the fixing plate (603) are fixed with guide rods (606). Both sides of the mounting base (1) are provided with limit grooves (607). One end of the guide rod (606) inside the limit groove (607) is fixed with a limit block (608). A third spring (609) is installed on the outside of the guide rod (606) inside the limit groove (607).

2. The punch assembly for a precision mold according to claim 1, characterized in that: The positioning structure (5) includes a positioning groove (501) disposed inside the mounting base (1) at the top of the mounting groove (2), a positioning block (502) fixed at the middle position of the top of the punch seat (3), a first built-in groove (503) disposed inside the mounting base (1) at the top of the positioning groove (501), a first spring (504) fixed inside the first built-in groove (503), a pressure plate (505) fixed at one end of the first spring (504), a second built-in groove (506) disposed on both sides of the positioning groove (501), a second spring (507) fixed inside the second built-in groove (506), a locking block (508) fixed at one end of the second spring (507), and a locking groove (509) disposed inside the positioning block (502) outside the locking block (508).

3. A punch assembly for a precision mold according to claim 2, characterized in that: The positioning groove (501) is fitted into the positioning block (502), the bottom end of the pressure plate (505) abuts against the top end of the positioning block (502), and the pressure plate (505) and the first built-in groove (503) form a telescopic structure through the first spring (504).

4. A punch assembly for a precision mold according to claim 2, characterized in that: The second built-in groove (506) is symmetrically distributed on both sides of the positioning groove (501). The locking block (508) and the second built-in groove (506) form a telescopic structure through the second spring (507). The locking block (508) and the positioning block (502) form a locking structure through the locking groove (509). The locking block (508) is tapered.

5. A punch assembly for a precision mold according to claim 1, characterized in that: The threaded rods (601) are symmetrically distributed on both sides of the mounting base (1). The threaded rods (601) are threadedly connected to the mounting base (1). The fixing plate (603) is L-shaped. The rotating block (604) and the fixing plate (603) are rotatably connected through the rotating groove (605). The cross-section of the rotating block (604) is T-shaped.

6. A punch assembly for a precision mold according to claim 1, characterized in that: The guide rods (606) are symmetrically distributed on both sides of the threaded rod (601) on one side of the fixed plate (603), and one end of the guide rod (606) extends through one side of the mounting groove (2) into the interior of the limiting groove (607).

7. A punch assembly for a precision mold according to claim 1, characterized in that: The guide rod (606) and the limiting groove (607) form a limiting structure through the limiting block (608), and the guide rod (606) and the limiting groove (607) form a telescopic structure through the third spring (609).

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