Deep hole stamping die with male die protection structure

Abstract

The utility model relates to a deep hole punching die with a male die protection structure in the field of punching dies. Comprising an upper die base, a stripper plate fixing plate below the upper die base, a stripper plate fixing screw in clearance fit with the stripper plate fixing plate, a strong spring, a punching needle rear fixing plate, a punching needle fixed through the punching needle fixing plate, an upper protective sleeve fixing plate below the punching needle fixing plate, an upper protective sleeve and a lower protective sleeve, wherein the upper protective sleeve and the lower protective sleeve wrap the outer side of the punching needle in a clearance fit mode. The discharging plate is connected with the guide column in a sliding mode, the lower protective sleeve fixing plate is assembled on the lower portion of the discharging plate, the female die insert and the lower die base are arranged below the discharging plate, an upper boss and a lower boss are arranged on the upper protective sleeve and the lower protective sleeve respectively and used for assembling the upper protective sleeve and the lower protective sleeve, and the lower end of the lower protective sleeve extends out of the discharging plate; and the upper protective sleeve and the lower protective sleeve are embedded with each other. According to the device, the service life of the punching needle is prolonged through the two mutually-embedded protective sleeves, and the smoothness of the punching section is improved through the lower protective sleeve with the lower end extending out of the discharging plate.

Description

Technical Field

[0001] The utility model relates to the field of punching dies, in particular to a deep hole punching die with a punch protection structure. Background Art

[0002] Punching dies are a common type of dies for processing mechanical parts, and are widely used in processing various products with holes. However, when processing thicker raw materials whose hole diameter is smaller than the thickness of the workpiece, two problems will arise if the punch structure is not properly protected. First, when punching, in order to meet the punching requirements, the punching force of the punch needle and the friction between the punch needle head and the hole are often very large, which causes the punch needle head to generate high temperature during punching, which is easy to wear and reduces the punching accuracy. In addition, due to the raw materials of the workpiece, the punch needle is sometimes subjected to lateral force, so dozens of punch needles are often broken or bent after punching, and the punch needle needs to be replaced or repaired, which increases the production cost. Second, in the existing punching operation, the discharge plate on the outside of the punch needle is in direct contact with the raw material of the workpiece, and the force area of ​​the workpiece is large, resulting in insufficient pressure around the punch hole, and the cross section of the punched hole is not smooth. Therefore, it is necessary to design a mold structure that protects the punch needle in the punch to extend the service life of the punch needle and improve the punching quality. Utility Model Content

[0003] The utility model aims to provide a deep hole punching die with a punch protection structure to solve the problems mentioned in the background technology.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted is: a deep hole punching die with a punch protection structure, consisting of a punch and a die, wherein the punch includes an upper die seat, a guide column slidably connected to the upper die seat, a stripping plate fixing plate fixed below the upper die seat, a stripping plate fixing screw with a clearance fit with the stripping plate fixing plate, a spring arranged around the stripping plate fixing screw, a punch needle rear fixing plate fixed below the stripping plate fixing plate, a punch needle fixed below the punch needle rear fixing plate by the punch needle fixing plate, an upper protective sleeve fixing plate installed below the punch needle fixing plate, an upper protective sleeve and a lower protective sleeve wrapped around the outside of the punch needle, a stripping plate slidably connected to the guide column, and a lower protective sleeve fixing plate assembled at the bottom of the stripping plate, and the die includes a die insert directly below the punch needle and a lower die seat connected to the lower end of the guide column. The upper protective sleeve and the lower protective sleeve are respectively matched with the punch needle clearance; the upper protective sleeve is embedded in the upper protective sleeve fixing plate by the upper boss, and the lower protective sleeve is embedded in the unloading plate by the lower protective sleeve fixing plate, and the lower end of the lower protective sleeve extends out of the unloading plate after assembly; the upper protective sleeve and the lower protective sleeve are interlocked with each other; in the working state, the upper protective sleeve can move up and down relative to the lower protective sleeve, and the lower end face of the lower protective sleeve is in contact with the upper surface of the punching workpiece.

[0005] Specifically, a square groove is milled in the middle of the lower end surface of the upper protective cover, and a square protrusion is milled in the middle of the upper end surface of the lower protective cover, and the groove and the protrusion are positioned opposite to each other.

[0006] Specifically, in a non-working state, the distance between the bottom of the square groove and the top of the square protrusion is greater than the depth of the punched hole.

[0007] As a further improvement, the upper boss is arranged around the upper end of the upper protective sleeve; and a lower boss is also arranged around the middle of the lower protective sleeve, which is used to place the lower protective sleeve on the lower protective sleeve fixing plate.

[0008] The upper boss is integrally formed with the upper protective sleeve body, and the lower boss is integrally formed with the lower protective sleeve body.

[0009] The upper and lower ends of the spring are respectively connected to the stripper plate fixing plate and the stripper plate. When punching, the stripper plate fixing plate can move up and down relative to the stripper plate fixing screw under the deformation of the spring.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The deep hole punching die reduces the lateral force on the punching needle through the design of the upper and lower protective sleeves arranged around the punching needle, thereby extending the service life of the punching needle. In addition, since only the lower protective sleeve in the punch structure contacts the workpiece raw material during punching, the pressure around the punching hole is increased, and the surface smoothness of the punched hole is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the overall structure diagram of the embodiment of the utility model;

[0013] Figure 2 It is a schematic diagram of the structure of the upper protective cover and the lower protective cover in a non-working state of an embodiment of the utility model;

[0014] Figure 3 This is a front view of the upper protective cover of the embodiment of the utility model;

[0015] Figure 4 This is a front view of the lower protective cover of the embodiment of the utility model;

[0016] Figure 5 It is a partial enlarged view of the structure around the upper and lower protective covers of the embodiment of the utility model;

[0017] Figure 6 This is a diagram of the mold state when punching a hole in an embodiment of the utility model.

[0018] In the figure, 1-upper die base, 2-stripping plate fixing plate, 3-stripping plate fixing screw, 4-guide column, 5-punch needle rear fixing plate, 6-punch needle fixing plate, 7-upper protective sleeve fixing plate, 8-spring, 9-upper protective sleeve, 901-upper boss, 902-upper protective sleeve body, 10-lower protective sleeve, 1001-lower boss, 1002-lower protective sleeve body, 11-stripping plate, 12-lower protective sleeve fixing plate, 13-die insert, 14-lower die base, 15-punch needle, 16-guide sleeve, 17-punching workpiece. DETAILED DESCRIPTION

[0019] The present invention will be further explained and illustrated below in conjunction with the accompanying drawings and embodiments.

[0020] Example: See Figure 1 A deep hole punching die with a punch protection structure, consisting of a punch and a die, wherein the punch includes an upper die base 1, a guide column 4 slidably connected to the upper die base 1, a stripper plate fixing plate 2 fixed below the upper die base 1, a stripper plate fixing screw 3 with a clearance fit with the stripper plate fixing plate 2, a spring 8 arranged around the stripper plate fixing screw 3, a punch needle rear fixing plate 5 fixed below the stripper plate fixing plate 2, a punch needle 15 fixed below the punch needle rear fixing plate 5 by the punch needle fixing plate 6, an upper protective sleeve fixing plate 7 installed below the punch needle fixing plate 6, an upper protective sleeve 9 and a lower protective sleeve 10 surrounding the punch needle 15, a stripper plate 11 slidably connected to the guide column 4, and a lower protective sleeve fixing plate 12 at the lower part of the stripper plate 11; the die includes a die insert 13 fixed directly below the punch needle 15 and a lower die base 14 connected to the lower end of the guide column 4.

[0021] The upper protective sleeve 9 and the lower protective sleeve 10 are respectively fitted with the punching needle 15 in a clearance; the upper protective sleeve 9 is embedded in the upper protective sleeve fixing plate 7 by using the upper boss 901 arranged around the upper end thereof, and the lower protective sleeve 10 is embedded in the stripping plate 11 by using the lower boss 1001 arranged around the middle thereof, and the lower protective sleeve fixing plate 12 is fixed to the lower part of the stripping plate 11 by screws, and the lower end of the lower protective sleeve 10 is extended out of the stripping plate 11 after assembly. After assembly, the rear end of the punching needle 15 is pressed against the punching needle rear fixing plate 5.

[0022] The upper die base 1 and the stripper plate fixing plate 2 are connected by bolts; the stripper plate 11 and the stripper plate fixing screw 3 are threadedly connected; the punch needle rear fixing plate 5, the punch needle fixing plate 6 and the upper protective sleeve fixing plate 7 are connected by bolts; the lower protective sleeve fixing plate 12 is fixed to the stripper plate 11 by screws; the die insert 13 and the lower die base 14 are fixed by bolts.

[0023] The stripper plate 11 is slidably connected via the guide sleeve 16 and the guide column 4, so that the stripper plate 11 can remain parallel to the upper die base 1 during the punching process, thereby ensuring that the lower protective sleeve 10 assembled in the stripper plate 11 can accurately fit the upper edge of the punch hole. Therefore, when the punch is subjected to an unexpected lateral force, the stripper plate 11 withstands the lateral force through the lower protective sleeve 10, protecting the punch pin 15 from longitudinal bending or breaking, thereby maintaining the stability of the punch structure.

[0024] See also Figure 2-Figure 4 A square groove is milled in the middle of the lower end surface of the upper protective cover 9, and a square protrusion is milled in the middle of the upper end surface of the lower protective cover 10, and the groove and the protrusion are opposite to each other; in the non-working state, the upper protective cover 9 and the lower protective cover 10 are shallowly embedded with each other, and the distance between the bottom of the square groove and the top of the square protrusion is greater than the depth of the punching. This design not only saves the material of the protective cover, but also can better play the protective role and effectively improve the punching quality.

[0025] See also Figure 5 In the working state, the upper protective cover 9 can move up and down relative to the lower protective cover 10, and the lower end surface of the lower protective cover 10 is in contact with the upper surface of the punching workpiece 17.

[0026] The outer diameter of the upper protective cover 9 is slightly larger than the outer diameter of the lower protective cover 10. The upper boss 901 is integrally formed with the upper protective cover body 902, and the lower boss 1001 is integrally formed with the lower protective cover body 1002.

[0027] See also Figure 1 and Figure 5 A plurality of screw head accommodating cavities are provided on the outer side of the stripper plate fixing plate 2 so that the stripper plate fixing screws 3 can shuttle up and down in the stripper plate fixing plate 2 during punching; during punching, the spring 8 is compressed, and the distance between the stripper plate 11 and the stripper plate fixing plate 2 is shortened.

[0028] The working process of this embodiment is briefly described below:

[0029] In the initial state, the upper protective sleeve 9 and the lower protective sleeve 10 are in a shallowly embedded state, and the lower end of the punching needle 15 is flush with the lower end of the lower protective sleeve 10.

[0030] After punching begins, the punch moves downward, the spring 8 is compressed, the unloading plate fixing plate 2 moves downward relative to the unloading plate fixing screw 3, and the upper protective cover 9 and the punch needle 15 also move downward along with the punch needle and the rear fixing plate 5 until the lower end surface of the lower protective cover 10 fits the workpiece raw material. Then the punch continues to move downward, and as the spring 8 is further compressed, the spring force is fully transmitted to the lower protective cover 10 and the lower end of the punch needle 15. The punch needle 15 extends out of the lower protective cover 10 to complete the punching operation. At this time, the upper protective cover 9 and the lower protective cover 10 are completely fitted together.

[0031] After the punching is completed, as the punch moves upward, the spring 8 gradually resets, the punch needle 15 retracts into the lower protective cover 10, the upper protective cover 9 and the lower protective cover 10 gradually resume a shallow fitting state, and the punch also resumes its initial state before punching.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and similar expressions are for illustrative purposes only, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0033] 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 basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary, but not restrictive, and the scope of the present invention is defined by the appended claims rather than the above explanations and descriptions, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. At the same time, any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A deep hole punching die with a punch protection structure, consisting of a punch and a die; The punch comprises an upper die seat (1), a guide column (4) slidably connected to the upper die seat (1), a stripper plate fixing plate (2) fixed below the upper die seat (1), a stripper plate fixing screw (3) clearance-matched with the stripper plate fixing plate (2), a spring (8) arranged around the stripper plate fixing screw (3), a punch needle rear fixing plate (5) fixed below the stripper plate fixing plate (2), a punch needle (15) fixed below the punch needle rear fixing plate (5) by the punch needle fixing plate (6), an upper protective sleeve fixing plate (7) installed below the punch needle fixing plate (6), a stripper plate (11) slidably connected to the guide column (4), and a lower protective sleeve fixing plate (12) assembled at the lower part of the stripper plate (11); the die comprises a die insert (13) directly below the punch needle (15) and a lower die seat (14) connected to the lower end of the guide column (4); Features: The punch also includes an upper protective sleeve (9) and a lower protective sleeve (10) wrapped around the outer side of the punch needle (15), and the upper protective sleeve and the lower protective sleeve respectively form a clearance fit with the punch needle (15); the upper protective sleeve (9) is embedded in the upper protective sleeve fixing plate (7) using the upper boss (901), and the lower protective sleeve (10) is embedded in the unloading plate (11) using the lower protective sleeve fixing plate (12); after the lower protective sleeve (10) is assembled, the lower end of the lower protective sleeve (10) extends out of the unloading plate (11); the upper protective sleeve (9) and the lower protective sleeve (10) are interlocked; in the working state, the upper protective sleeve (9) can move up and down relative to the lower protective sleeve (10), and the lower end surface of the lower protective sleeve (10) is in contact with the upper surface of the punching workpiece (17).

2. The deep hole punching die according to claim 1, characterized in that: A square groove is milled in the middle of the lower end surface of the upper protective sleeve (9), and a square protrusion is milled in the middle of the upper end surface of the lower protective sleeve (10), and the square groove and the square protrusion are located opposite to each other.

3. The deep hole punching die according to claim 2, characterized in that: In a non-working state, the distance between the bottom of the square groove and the top of the square protrusion is greater than the depth of the punched hole.

4. The deep hole punching die according to claim 1, characterized in that: The upper boss (901) is arranged around the upper end of the upper protective sleeve (9); the middle part of the lower protective sleeve (10) is also arranged around a lower boss (1001) for placing the lower protective sleeve (10) on the lower protective sleeve fixing plate (12).

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