CN213856522U

CN213856522U - Hole-flanging punch

Info

Publication number: CN213856522U
Application number: CN202022867622.8U
Authority: CN
Inventors: 李舒扬
Original assignee: Xiangtan Yifeng Mould Manufacturing Co ltd
Current assignee: Guangzhou Yifeng Mold Manufacturing Co ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-08-03
Anticipated expiration: 2030-12-03

Abstract

The utility model provides a dash and turn over hole drift. Comprises a forming punch and a piercing ejector rod; and an accommodating cavity for accommodating the puncture ejector rod is formed in the forming punch, a spring sleeved on the first end of the puncture ejector rod is further arranged in the accommodating cavity, and the second end of the puncture ejector rod moves in front of the first end of the forming punch through the extension and retraction of the spring. The utility model discloses a setting can be in the shaping drift elasticity removal puncture ejector pin, through the drop of the waste material of realizing that resets of puncturing the ejector pin to overcome the pointed end of punching the hole flanging drift and carry some punching press waste materials easily and produce the problem of secondary damage to the hole flanging.

Description

Hole-flanging punch

Technical Field

The utility model relates to a technical field that punches a hole, concretely relates to dash hole flanging drift.

Background

Hole flanging is a common hole site form on the surface of a workpiece, and is generally formed by punching a hole flanging punch.

In the prior art, the hole punching and flanging punch comprises a conical piercing tip which is arranged at the top of the forming male die and can be integrally formed with the forming male die. During specific forming, the pointed end is punctured through the cone to puncture the surface of the position to be punched, and then the hole is subjected to punch forming through the forming male die.

However, the tip of the hole flanging punch in the prior art is easy to carry some punching waste, and the hole position is subjected to secondary shearing of the waste in the punching process, so that the hole flanging forming quality is affected.

SUMMERY OF THE UTILITY MODEL

To the problem, the utility model provides a dash hole flanging drift overcomes the pointed end that dashes the hole flanging drift and carries some punching press waste material easily to the problem that the hole flanging produced secondary damage.

In order to solve the problems, the technical scheme provided by the utility model provides a punching and flanging hole punch, which comprises a forming punch and a piercing ejector rod; and an accommodating cavity for accommodating the puncture ejector rod is formed in the forming punch, a spring sleeved on the first end of the puncture ejector rod is further arranged in the accommodating cavity, and the second end of the puncture ejector rod moves in front of the first end of the forming punch through the extension and retraction of the spring.

In one possible embodiment, the forming punch is provided with a threaded hole, a spring mounting hole and a limiting through hole which are concentric along the second end to the first end of the forming punch in sequence; the spring is arranged in the spring mounting hole, the middle part of the rod body of the puncture ejector rod is provided with a boss used for abutting against the first end of the spring, and a plug used for abutting against the second end of the spring is matched with the internal thread of the threaded hole; and the second end of the puncture ejector rod penetrates through the limiting through hole to be arranged at the front end of the forming punch.

In one possible embodiment, the first end of the piercing ejector pin can contact the bottom surface of the plug and the distance from the second end of the piercing ejector pin to the first end of the forming punch is greater than zero.

In a possible embodiment, the first end of the piercing ejector rod is provided with a pointed head, and the pointed head is shaped like a quadrangular pyramid.

In a possible embodiment, the first end of the forming punch is provided with a male die matching the shape of the inner cavity of the hole to be formed.

The piercing punch provided by the embodiment is characterized in that the sharp head part of the piercing punch is arranged on the piercing ejector rod, the piercing ejector rod and the forming punch are of a split structure, the spring which can enable the sharp head part of the piercing ejector rod to be always arranged at the front end of the forming punch is arranged in the forming punch, namely, the piercing ejector rod is tightly ejected at the front end of the forming punch through the elasticity of the spring, when the piercing ejector rod extrudes a workpiece, the piercing ejector rod can be retracted backwards under the action of the spring, when the workpiece is pierced, the piercing ejector rod can reset, and waste attached to the piercing punch is shaken off by the force generated by resetting, so that secondary damage and hole flanging are avoided.

Drawings

Fig. 1 is a cross-sectional view of a piercing punch according to an embodiment of the present invention;

fig. 2 is a split view of the piercing punch according to an embodiment of the present invention.

Description of reference numerals:

1-forming a punch; 2-piercing the ejector rod; 3-plugging by screws; 4-a spring; 101-spring mounting holes; 102-a threaded hole; 103-a limiting through hole; 104-a male die; 201-a boss; 202-pointed portion.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-2, the present embodiment provides a piercing punch comprising a forming punch 1 and a piercing ram 2.

The forming punch 1 is used for limiting the hole pattern of the hole to be punched and flanged, a male die 104 which is consistent with the shape of the inner cavity of the hole to be punched and flanged is arranged on the forming punch 1, and the flanging is formed through the structure of the male die 104.

The piercing mandril 2 is used for pre-piercing the surface of the workpiece to be punched and flanged, so as to facilitate the entry of the male die 104. The pointed head 202 is arranged on the punch 104, and the pointed head 202 is arranged at the front end of the punch 104, that is, a hole is pre-formed on the surface of the workpiece to be punched and flanged through the pointed head 202, and the punch 104 enters the edge of the flanged hole from the formed hole to be punched and formed.

When punching the hole flanging of punching the hole flanging drift, the tip of its original conical spine portion can ejecting a part waste material, specifically speaking, the easy heating of tip 202 anterior segment and taking the greasy dirt in the punching process, perhaps because the wearing and tearing of tip 202 do not bore empty workpiece surface, but cut a fritter waste material, these waste materials can not drop a bit, and stamp the hole position once more along with the drift, cause the damage of hole site.

In order to solve the problem that the sharp head part 202 of the punch carries waste, the sharp head part 202 and the forming punch 1 are arranged in a split mode, namely the sharp head part 202 is independently arranged on the second end of the piercing mandril 2, an accommodating cavity for accommodating the piercing mandril 2 is formed in the forming punch 1, a spring 4 sleeved on the first end of the piercing mandril 2 is further arranged in the accommodating cavity, and the second end of the piercing mandril 2 moves in front of the first end of the forming punch 1 through the stretching of the spring 4.

That is, the piercing mandrel 2 with the pointed portion 202 is movably disposed in the accommodating chamber in the forming punch 1, that is, the piercing mandrel 2 is pressed against by the spring 4, so that the pointed portion 202 thereof protrudes from the first end of the forming punch 1, that is, the punch 104 end, by virtue of the pressing force of the spring 4. It should be noted that the piercing ram 2 always extends from the end of the punch 104, and the extension length is changed by the spring 4. When the pointed head part 202 is contacted with the surface of the workpiece, the pointed head part is retracted backwards to a fixed position, the workpiece is extruded and opened on the workpiece, when the surface of the workpiece is punctured, the pointed head part is reset under the elastic force of the spring 4, if waste materials exist on the pointed head part 202 at the moment, the pointed head part 202 can fall off in the resetting process, and therefore secondary damage to hole flanging can be avoided.

In one possible implementation, the forming punch 1 is provided with a threaded hole 102, a spring mounting hole 101 and a limiting through hole 103, which are concentric, in this order from the second end to the first end thereof. The nominal diameter of the threaded hole 102 is larger than that of the spring mounting hole 101, and the diameter of the spring mounting hole 101 is larger than that of the limiting through hole 103. The spring 4 is arranged in the spring mounting hole 101, the middle part of the rod body of the puncture mandril 2 is provided with a boss 201 which is used for abutting against the first end of the spring 4, optionally, the boss 201 is arranged in a cylindrical table structure which shares a central axis with the rod body of the puncture mandril 2, and the diameter of the diameter unit limiting through hole 103 of the boss 201 is smaller than that of the spring mounting hole 101, and the diameter unit limiting through hole mainly plays a limiting role. The threaded hole 102 is internally provided with a plug 3 which is used for abutting against the second end of the spring 4, the plug 3 is of a cylindrical structure, an external thread is arranged on the excircle of the cylindrical structure, and the external thread is matched with the threaded hole 102.

That is, the rod body part of the piercing mandril 2 takes the boss 201 as a boundary point, the rod body close to the first end of the boss 201 on one side of the boss 201 is arranged in the inner hole of the spring 4, the first end of the spring 4 is abutted against the boss 201 to limit the movement of the end, the second end of the spring 4 is abutted against the bottom surface of the plug 3 to limit the second end of the spring 4, and the spring 4 can stretch and contract in the space in the spring mounting hole 101; the part of the body of the piercing mandril 2 on the other side of the boss 201 close to the second end passes through the limiting through hole 103 and enables the pointed part 202 to be arranged at the front end of the forming punch 1, wherein the part of the body of the piercing mandril 2 close to the second end is in clearance fit with the limiting through hole 103.

In a possible implementation manner, the first end of the piercing mandril 2 can be contacted with the bottom surface of the plug 3, and the distance from the second end of the piercing mandril 2 to the first end of the forming punch 1 is larger than zero.

That is, when the first end of the piercing mandril 2 retracts under the action of the spring 4 and abuts against the bottom surface of the plug 3, the top of the part 202 of the pointed head part extending out of the first end of the forming punch 1 pierces the surface of the workpiece, and the first end of the piercing mandril 2 abuts against the plug 3 to provide a stress point for the plug to press the surface of the workpiece. The distance from the second end of the piercing mandril 2 to the first end of the forming punch 1 is larger than zero, which means that the piercing mandril 2 always needs to extend out of a part of the first end (the male die 104 end) of the forming punch 1 to realize the piercing function.

To further improve the problem of the tip portion 202 carrying waste material, the tip portion 202 is optionally shaped as a quadrangular pyramid. With this pyramid-shaped structure, when the waste forming depressions are wrapped outside the pointed portions 202 of the pyramids, the corners of the pyramids can reduce the contact surface with the waste, thereby making the waste more likely to fall off.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A punching and flanging punch is characterized by comprising a forming punch and a piercing ejector rod; and an accommodating cavity for accommodating the puncture ejector rod is formed in the forming punch, a spring sleeved on the first end of the puncture ejector rod is further arranged in the accommodating cavity, and the second end of the puncture ejector rod moves in front of the first end of the forming punch through the extension and retraction of the spring.

2. The piercing punch as claimed in claim 1, wherein the forming punch is provided with a threaded hole, a spring mounting hole and a limiting through hole which are concentric along a second end to a first end of the forming punch in sequence; the spring is arranged in the spring mounting hole, the middle part of the rod body of the puncture ejector rod is provided with a boss used for abutting against the first end of the spring, and a plug used for abutting against the second end of the spring is matched with the internal thread of the threaded hole; and the second end of the puncture ejector rod penetrates through the limiting through hole to be arranged at the front end of the forming punch.

3. The piercing punch as claimed in claim 2, wherein the first end of the piercing ram is contactable with the bottom surface of the plug and the distance from the second end of the piercing ram to the first end of the forming punch is greater than zero.

4. The piercing punch as claimed in claim 1, wherein the piercing ejector rod first end is provided with a pointed head portion, and the pointed head portion is shaped as a quadrangular pyramid.

5. The piercing punch as claimed in claim 1, characterized in that the first end of the forming punch is provided with a punch matching the shape of the bore to be formed.