Punch pin mounting structure of hardware trimming die
By introducing a spring ball pin structure into the metal trimming die, the punch can be quickly replaced, solving the problem of difficult replacement operation in the existing technology and improving production efficiency.
Patent Information
- Application Number
- CN202423172909.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-23
AI Technical Summary
In existing metal parts trimming dies, the punch replacement operation is difficult and affects production efficiency.
It adopts a spring ball pin structure and uses a plug-in block and unlocking hole design to achieve quick replacement of punches, avoiding the need to disassemble other parts of the mold.
It simplifies the punch replacement process, improves production efficiency, and reduces operational difficulty.
Smart Images
Figure CN223543880U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of hardware processing equipment, specifically to a punch mounting structure for a hardware trimming die. Background Technology
[0002] For die-cast hardware parts, burrs often appear at the parting line of the mold and the edges of holes, which need to be removed by further processing. The usual method is to use a cutting die to punch away the burrs on the edges of the hardware parts and the edges of the holes.
[0003] Among them, the tool used for punching the edges of hardware parts is the cutter, while the tool used for punching the edges of holes is the punch. The punch has a small force-bearing area, is easily damaged, and often needs to be replaced. However, in the existing edge-cutting mold structure, the punch has a T-head and is inserted from top to bottom onto the mold mounting plate. The cutting tool, ejector plate, and other structures are installed below the mounting plate. Therefore, when replacing the punch, the cutting tool, ejector plate, and mounting plate must be completely removed before the punch can be taken out for replacement. This makes the punch replacement operation difficult and affects production efficiency. Utility Model Content
[0004] The purpose of this invention is to provide a hardware trimming die structure with easily replaceable punches.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A punch mounting structure for a metal trimming die includes an upper die top plate, a mounting plate fixedly mounted on the bottom surface of the upper die top plate, a cutting blade fixedly mounted below the mounting plate for trimming product edges, a stripper plate elastically and vertically mounted below the mounting plate, and a punch for punching holes mounted on the mounting plate and passing through the stripper plate. The punch includes an insertion block and a punch pin fixed to the insertion block and extending vertically from the bottom surface. The bottom surface of the mounting plate has an insertion hole for vertically inserting the insertion block, and the mounting plate also has an oblique hole with an opening facing the side wall of the insertion block. A spring and a ball are provided in the oblique hole to form a spring-ball pin structure for positioning the insertion block, and the side wall of the insertion block has a positioning hole corresponding to the ball. The stripper plate has a disassembly hole for the insertion block to pass vertically through, and the stripper plate and the mounting plate also have an unlocking hole that extends vertically to the bottom of the ball.
[0007] In a preferred embodiment, when the ejector plate is pushed upward to its highest position, the bottom surface of the insertion block does not extend beyond the bottom surface of the ejector plate.
[0008] In a preferred embodiment, the top end of the plug-in block protrudes from the top surface of the mounting plate and abuts against the bottom surface of the upper mold top plate.
[0009] In a preferred embodiment, the oblique hole penetrates the top surface of the mounting plate, and the top surface is located at the bottom of the upper mold top plate.
[0010] In a preferred embodiment, a plurality of the cutting blades surround the outer periphery of the ejector plate, and a plurality of the punches are provided on the ejector plate.
[0011] In a preferred embodiment, one or more of the aforementioned punches are fixedly mounted on each of the aforementioned plug blocks.
[0012] The beneficial effects of this invention are as follows: When replacing the punch, simply use a needle-shaped tool to push the ball bearing upwards from the unlocking hole to retract it, allowing the punch to be removed downwards from the disassembly hole. When installing the punch, simply push the punch upwards from the disassembly hole; the spring-loaded ball bearing pin structure will then self-lock it. The punch replacement process does not require disassembling other parts of the mold, saving effort and increasing efficiency significantly, thus greatly improving production efficiency. Attached Figure Description
[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0014] Figure 1 This is a schematic diagram of the installation structure of the trimming mold in the embodiment;
[0015] Figure 2 This is a cross-sectional schematic diagram of the side mold mounting structure in the embodiment;
[0016] Figure 3 This is a schematic diagram of the punch and spring ball pin structure in the embodiment.
[0017] Figure 4 This is a schematic diagram of the structure at the bottom of the mounting plate in the embodiment. Detailed Implementation
[0018] The present invention will be further described below with reference to the accompanying drawings:
[0019] It should be noted that the terms indicating orientation in this application document, such as top surface, bottom surface, vertical direction, etc., are only for the purpose of providing a more intuitive description of the structure in conjunction with the accompanying drawings, and are not intended to limit the product structure.
[0020] refer to Figures 1 to 4As shown, a punch mounting structure for a metal trimming die includes an upper die top plate 1, a mounting plate 2 fixedly mounted on the bottom surface of the upper die top plate 1, a punching blade 3 fixedly mounted below the mounting plate 2 for punching product edges, a pusher plate 4 elastically and vertically mounted below the mounting plate 2, and a punch 5 mounted on the mounting plate 2 and passing through the pusher plate 4 for punching holes; the punch 5 includes an insertion block 51 and a punch 52 fixed to the insertion block 51 and extending vertically from the bottom surface; the bottom surface of the mounting plate 2 has a vertically inserted insertion block 52 for inserting the punch 52. The connector 51 has an insertion hole 21, and the mounting plate 2 also has an oblique hole 22 with an opening facing the side wall of the connector 51. A spring 221 and a ball bearing 222 are provided in the oblique hole 22 to form a spring ball bearing pin structure for positioning the connector 51. The side wall of the connector 51 has a positioning hole corresponding to the ball bearing 222. The pusher plate 4 has a disassembly hole 41 for the connector 51 to pass through vertically. The pusher plate 4 and the mounting plate 2 also have an unlocking hole (42, 23) that extends vertically to the bottom of the ball bearing 222.
[0021] When replacing punch 52, simply use a needle-shaped tool to push the ball bearing 222 upwards through the unlocking hole (42,23) to retract it, allowing punch 5 to be removed downwards from the disassembly hole 41. When installing punch 5, simply push it upwards through the disassembly hole 41; the spring-loaded ball bearing pin structure will then self-lock it. Replacing punch 52 requires no disassembly of other parts of the mold, saving effort and increasing efficiency significantly, thus greatly improving production efficiency.
[0022] In a preferred embodiment, when the pusher plate 4 is pushed upward to its highest position, the bottom end face of the insertion block 51 does not extend beyond the bottom surface of the pusher plate 4. This prevents the insertion block 51 from contacting and impacting the product surface during mold closing.
[0023] In a preferred embodiment, the top end of the plug-in block 51 protrudes from the top surface of the mounting plate 2 and abuts against the bottom surface of the upper mold top plate 1. This facilitates the machining of the plug hole 21 on the mounting plate 2 and allows for precise control of the depth of the plug hole 21.
[0024] In a preferred embodiment, the oblique hole 22 penetrates the top surface of the mounting plate 2, and the top surface is located at the bottom of the upper mold top plate 1. Since the oblique hole 22 needs to limit the ball bearing 222 to prevent the ball bearing 222 from dislodging from the oblique hole 22, the oblique hole 22 is set through the mounting plate 2, which makes it convenient to machine the oblique hole 22 obliquely from top to bottom on the mounting plate 2.
[0025] In a preferred embodiment, a plurality of the punching blades 3 surround the outer periphery of the pusher plate 4, and a plurality of the punches 5 are provided on the pusher plate 4. Further, one or more of the pins 52 are fixedly mounted on each of the insertion blocks 51. This can be used to efficiently process products with complex structures.
[0026] The above description does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.
Claims
1. A punch mounting structure for a metal trimming die, comprising an upper die top plate, a mounting plate fixedly mounted on the bottom surface of the upper die top plate, a cutting blade for trimming product edges fixedly mounted below the mounting plate, a stripper plate elastically and vertically mounted below the mounting plate, and a punch for punching holes mounted on the mounting plate and passing through the stripper plate; characterized in that: The punch includes a plug-in block and a punch pin fixed to the plug-in block and extending vertically from the bottom surface; the bottom surface of the mounting plate has a vertical insertion hole for inserting the plug-in block, and the mounting plate also has an oblique hole with an opening facing the side wall of the plug-in block. A spring and a ball are provided in the oblique hole to form a spring-ball pin structure for positioning the plug-in block, and the side wall of the plug-in block has a positioning hole corresponding to the ball; the ejector plate has a disassembly hole for the plug-in block to pass through vertically, and the ejector plate and the mounting plate also have an unlocking hole that extends vertically to the bottom of the ball.
2. The punch mounting structure of a hardware trimming die according to claim 1, characterized in that: When the ejector plate is pushed upward to its highest position, the bottom surface of the plug-in block does not extend beyond the bottom surface of the ejector plate.
3. The punch mounting structure for a metal trimming die according to claim 1, characterized in that: The top of the plug-in block protrudes from the top surface of the mounting plate and abuts against the bottom surface of the upper mold plate.
4. The punch mounting structure of a hardware trimming die according to claim 1, characterized in that: The oblique hole penetrates the top surface of the mounting plate, and the top surface is located at the bottom of the upper mold plate.
5. The punch mounting structure of a hardware trimming die according to claim 1, characterized in that: A plurality of the aforementioned cutting blades surround the outer periphery of the ejector plate, and a plurality of the aforementioned punches are provided on the ejector plate.
6. The punch mounting structure of a hardware trimming die according to claim 5, characterized in that: One or more of the aforementioned punches are fixedly installed on each of the aforementioned plug blocks.