Stepped punching needle of hardware die

Abstract

The utility model discloses a hardware die step punch pin which solves the problem that a punch carries waste materials and ensures stability and reliability of follow-up products. The punching needle body comprises a top positioning ring column, a middle guide column and a lower punching needle column; the ejector pin comprises a large-diameter head part and a small-diameter rod end; a linear spring; and a fastener; the center of the top positioning ring column is concave inwards to form a fixing hole, a first guide column cavity and a second guide column cavity which are axially through are formed in the radial center of the middle guide column, the first guide column cavity is communicated with the upper end of the second guide column cavity, and a punching needle penetrating hole which is axially through is formed in the radial center of the lower punching needle column. The punching needle through hole is communicated with the lower end of the second guide column cavity; the linear spring and the large-diameter head are placed in the first guide column cavity, the small-diameter rod end is placed in the second guide column cavity, and the lower end of the small-diameter rod end penetrates through the punching needle penetrating hole and then protrudes downwards.

Description

Technical Field

[0001] The utility model relates to the technical field of punching pin structures, in particular to a hardware mold step punching pin. Background Art

[0002] In the structure of the metal mold, after the existing metal mold punch needle completes the punching of the material, the upper mold drives the metal mold to reset. In actual use, when the material is a tape or film that is easy to stick, the bottom of the punch is easy to drive the waste to rise, resulting in incomplete waste discharge. Therefore, it is urgent to develop a punch needle structure that can ensure sufficient and reliable waste discharge. Summary of the invention

[0003] In view of the above problems, the utility model provides a hardware mold stepped punching needle, which solves the problem of waste material on the punch head and ensures the stability and reliability of subsequent products.

[0004] The hardware mold stepped punching needle is characterized in that it includes:

[0005] The punch needle body includes a top positioning ring column, a middle guide column, and a lower punch needle column;

[0006] An ejector pin including a large-diameter head and a small-diameter rod end;

[0007] Linear springs;

[0008] and fasteners;

[0009] The center of the top positioning ring column is concave to form a fixing hole, the radial center of the middle guide column is provided with a first guide column cavity and a second guide column cavity axially penetrating therethrough, the first guide column cavity is connected to the upper end of the second guide column cavity, and the radial center of the lower punch needle column is provided with an axially penetrating punch needle through hole, the punch needle through hole is connected to the lower end of the second guide column cavity;

[0010] The linear spring and the large-diameter head are placed in the first guide column cavity, and the small-diameter rod end is placed in the second guide column cavity. The lower end of the small-diameter rod end passes through the punch through hole and then bulges downward;

[0011] The fastener is fixed in the fixing hole and pressed on the upper end of the linear spring, and the linear spring is pressed on the large-diameter head.

[0012] It is further characterized by:

[0013] The inner diameter of the first guide column cavity is greater than the inner diameter of the second guide column cavity;

[0014] The length of the first guide column cavity is smaller than the length of the linear spring in a natural state;

[0015] The inner diameter of the first guide column cavity is 0.2 mm to 0.5 mm larger than the diameter of the large-diameter head, which ensures that the large-diameter head can be easily retracted along the first guide column cavity during punching and is convenient for disassembly and assembly;

[0016] The connection position between the middle guide column and the lower punch needle column is a truncated cone structure, which ensures the convenient manufacture of the punch needle body;

[0017] The fixing hole is a threaded hole, and the fastener is a screw, which is connected to the fixing hole and has an inner end that presses tightly against the upper surface of the linear spring;

[0018] The screw is a cylindrical screw, which is driven by a concave cross slot, a slotted slot or a hexagonal slot;

[0019] After the screw is assembled, its upper portion does not protrude from the upper surface of the fixing hole;

[0020] The lower end of the small-diameter rod end is a plane;

[0021] The lower end of the small-diameter rod end protrudes downward from the lower end surface of the lower punching needle column by a distance of 1 mm to 2 mm.

[0022] After adopting the above technical scheme, an ejector pin is inserted through the punch pin body of the hardware mold, and the elastic force of the linear spring and the ejector pin are used to eject the waste material for the second time, which prevents the punch from carrying waste material when punching the glue or film that is easy to stick back, resulting in incomplete discharge of the hole waste; solves the problem of the punch carrying waste material, prevents the hole waste from being missed and assembled into components, resulting in major defects; and prevents the punch from carrying waste material, resulting in punch wear or punch breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the punch needle body of the utility model;

[0025] Figure 3 It is a schematic diagram of the structure of the ejector pin of the utility model;

[0026] The names corresponding to the serial numbers in the figure are as follows:

[0027] Punch needle body 10, top positioning ring column 11, middle guide column 12, lower punch needle column 13, frustum structure 14, fixing hole 15, first guide column cavity 16, second guide column cavity 17, punch needle through hole 18, ejector pin 20, large diameter head 21, small diameter rod end 22, linear spring 30, fastener 40. DETAILED DESCRIPTION

[0028] Hardware mold step punch pin, see Figure 1-Figure 3 , which includes a punch body 10, an ejector pin 20, a linear spring 30, and a fastener 40;

[0029] The punch needle body 10 includes a top positioning ring column 11, a middle guide column 12, and a lower punch needle column 13. The center of the top positioning ring column 11 is concave to form a fixing hole 15. The radial center of the middle guide column 12 is provided with an axially penetrating first guide column cavity 16 and a second guide column cavity 17. The first guide column cavity 16 is connected to the upper end of the second guide column cavity 17. The radial center of the lower punch needle column 13 is provided with an axially penetrating punch needle through hole 18. The punch needle through hole 18 is connected to the lower end of the second guide column cavity 17.

[0030] The ejector pin 20 includes a large diameter head 21 and a small diameter rod end 22;

[0031] A linear spring 30 and a large diameter head 21 are placed in the first guide column cavity 16, and a small diameter rod end 22 is placed in the second guide column cavity 17. The lower end of the small diameter rod end 22 passes through the punch through hole 18 and then protrudes downward by 1mm to 2mm.

[0032] The fastener 40 is fixedly mounted in the fixing hole 15 and is pressed onto the upper end of the linear spring 30 , and the linear spring 30 is pressed onto the large-diameter head 21 .

[0033] In a specific implementation, the inner diameter of the first guide post cavity 16 is greater than the inner diameter of the second guide post cavity 17;

[0034] The length of the first guide column cavity 16 is smaller than the length of the linear spring 30 in the natural state;

[0035] The inner diameter of the first guide column cavity 16 is 0.2 mm to 0.5 mm larger than the diameter of the large diameter head portion 21, which ensures that the large diameter head portion 21 can be easily retracted along the first guide column cavity 16 during punching and is convenient for disassembly and assembly.

[0036] The inner diameter of the second guide column cavity 17 is 0.01 mm to 0.03 mm larger than the outer diameter of the small-diameter rod end 22, ensuring reliable lifting and lowering of the small-diameter rod end without radial deviation that would damage waste discharge;

[0037] The connection position between the middle guide column 12 and the lower punching needle column 13 is a truncated cone structure 14 , which ensures that the punching needle body 10 is easy to manufacture.

[0038] In a specific implementation, the fixing hole 15 is a threaded hole, and the fastener 40 is a screw, which is connected to the fixing hole 15 and its inner end is pressed against the upper surface of the linear spring 30; the screw is a cylindrical screw, which is driven by a concave cross slot, a slotted slot or a hexagonal slot;

[0039] After the screw is assembled, its upper portion does not protrude beyond the upper surface of the fixing hole 15, and the lower end of the small-diameter rod end 22 is a plane.

[0040] Its working principle is as follows: an ejector is inserted through the punch body of the hardware mold, and the waste is ejected for the second time by using the elastic force of the linear spring and the ejector, which prevents the punch from carrying waste when punching the glue or film that is easy to stick back, resulting in incomplete discharge of hole waste; solves the problem of the punch carrying waste, prevents the hole waste from being missed and assembled into components, resulting in major defects; and prevents the punch from carrying waste, which causes punch wear or punch breakage.

[0041] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0042] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Hardware mold step punch, characterized by: It includes: The punch needle body includes a top positioning ring column, a middle guide column, and a lower punch needle column; An ejector pin including a large-diameter head and a small-diameter rod end; Linear springs; and fasteners; The center of the top positioning ring column is concave to form a fixing hole, the radial center of the middle guide column is provided with a first guide column cavity and a second guide column cavity axially penetrating therethrough, the first guide column cavity is connected to the upper end of the second guide column cavity, and the radial center of the lower punch needle column is provided with an axially penetrating punch needle through hole, the punch needle through hole is connected to the lower end of the second guide column cavity; The linear spring and the large-diameter head are placed in the first guide column cavity, and the small-diameter rod end is placed in the second guide column cavity. The lower end of the small-diameter rod end passes through the punch through hole and then bulges downward; The fastener is fixed in the fixing hole and pressed on the upper end of the linear spring, and the linear spring is pressed on the large-diameter head.

2. The metal mold step punch according to claim 1, characterized in that: The inner diameter of the first guide post cavity is greater than the inner diameter of the second guide post cavity.

3. The metal mold stepped punching needle according to claim 1, characterized in that: The length of the first guide column cavity is smaller than the length of the linear spring in a natural state.

4. The metal mold stepped punching needle according to claim 1, characterized in that: The inner diameter of the first guide column cavity is 0.2 mm to 0.5 mm larger than the diameter of the large-diameter head.

5. The metal mold step punch according to claim 1, characterized in that: The connection position between the middle guide column and the lower punch needle column is a truncated cone structure.

6. The metal mold stepped punching needle according to claim 1, characterized in that: The fixing hole is a threaded hole, and the fastener is a screw. The screw is connected to the fixing hole, and the inner end of the screw is pressed tightly against the upper surface of the linear spring.

7. The metal mold step punch according to claim 6, characterized in that: The screw is a cylindrical screw, which is driven through a concave cross slot, a slotted slot or a hexagonal slot.

8. The metal mold step punch according to claim 7, characterized in that: After the screw is assembled, its upper portion does not protrude beyond the upper surface of the fixing hole.

9. The metal mold stepped punching needle according to claim 1, characterized in that: The lower end of the small-diameter rod end is a plane.

10. The metal mold stepped punching needle according to claim 1 or 9, characterized in that: The lower end of the small-diameter rod end protrudes downward from the lower end surface of the lower punching needle column by a distance of 1 mm to 2 mm.

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