CN219151285U

CN219151285U - Stamping die for nut forming machine

Info

Publication number: CN219151285U
Application number: CN202223486576.2U
Authority: CN
Inventors: 秦海绪; 肖志成; 范淼彬; 张亚萍
Original assignee: Tong Ming Enterprise Co ltd
Current assignee: Tong Ming Enterprise Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-06-09
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses a stamping die for a nut forming machine, which comprises a stamping die base and a rear stamping rod, wherein the front end of the stamping die base is made of tungsten steel, and a first through hole is formed in the middle of the front end of the stamping die base; the rear end of the die base is provided with a second through hole, and the inner diameters of the first through hole and the second through hole are the same; the rear punch rod is arranged in the second through hole, and the front end of the rear punch rod can be inserted into the first through hole. According to the utility model, the die base is arranged into a straight-through structure, the contact area of the rear punch and the die base is enlarged, the rear punch is ensured to have no shaking during in-die impact, the punch breakage phenomenon is avoided, the service life of the rear punch is effectively prolonged, the equipment cost is saved, the machine adjusting time of the nut forming machine is reduced, and the processing efficiency of the nut forming machine is improved.

Description

Stamping die for nut forming machine

Technical Field

The utility model relates to the technical field of nut forming machines, in particular to a stamping die for a nut forming machine.

Background

In the nut processing process, holes are needed in the middle of the nut, the middle blank is still remained on the nut after being cut, and the redundant blank needs to be bumped by using a stamping die. As shown in fig. 3, the existing stamping die comprises an existing stamping die base 7 and a rear stamping rod 2, wherein the front end 71 of the existing stamping die base is made of tungsten steel, a small through hole 72 is formed in the middle of the front end, and a nut to be stamped is placed in the small through hole 72; the rear end of the die base 1 is provided with a large through hole 73, the diameter of the large through hole 73 is larger than that of the small through hole 72, and after the tail end of the rear punch rod 2 is stressed, the front end of the rear punch rod 2 is punched into the small through hole 72 to punch out residual blanks in the middle of the screw cap. The diameter of the small through hole 72 is matched with the diameter of the rear punch rod, so that the rear punch rod can conveniently extend into the large through hole 73, and the rear punch rod 2 is not contacted with the large through hole 73 in the punching process. The front end of the rear punch rod is only contacted with the small through hole 72, the contact area with the base is small, the tail end of the rear punch rod is easy to shake when being impacted by force, the rear punch rod is easy to burst, and the stamping die cannot be used. The rear punch needs to be replaced after being burst, and the replacement process is time-consuming and increases the equipment cost.

Disclosure of Invention

In order to solve the problems, the utility model provides a stamping die for a nut forming machine, which is not easy to crack a main stamping rod and can pass the nut processing efficiency.

For this purpose, the technical scheme of the utility model is as follows: the stamping die for the nut forming machine comprises a stamping die base and a rear stamping rod, wherein the front end of the stamping die base is made of tungsten steel, and a first through hole is formed in the middle of the front end of the stamping die base; the rear end of the die base is provided with a second through hole, and the inner diameters of the first through hole and the second through hole are the same; the rear punch rod is arranged in the second through hole, and the front end of the rear punch rod can be inserted into the first through hole.

Preferably, the first through hole and the second through hole are opposite, and the inner diameter is matched with the diameter of the back flushing rod.

Preferably, the end of the second through hole is provided with a spring mounting hole, the inner diameter of the spring mounting hole is larger than that of the second through hole, and a first step surface is formed at the junction of the spring mounting hole and the second through hole; and a reset spring is arranged in the spring mounting hole, the reset spring is sleeved on the back punch, one end of the reset spring is propped against the first step surface, and the other end of the reset spring is propped against the back punch.

Preferably, the tail end of the back punch is provided with a limiting surface, and the diameter of the limiting surface is larger than that of the back punch and smaller than the inner diameter of the spring mounting hole; the reset spring is propped against the limiting surface of the back punch.

Preferably, the die further comprises a front punch and a fixing seat for placing the front punch, a third through hole is formed in the middle of the fixing seat, the front punch is arranged in the third through hole, the front punch and the rear punch are oppositely arranged, and the front end of the front punch is inserted into the first through hole at the front end of the die base.

During operation, the screw cap is arranged in the first through hole at the front end of the die base, the front punch rod and the rear punch rod are respectively arranged at two sides of the screw cap, the front punch rod is used for limiting the movement of the screw cap, the tail end of the rear punch rod is stressed and impacts to one side of the screw cap, and therefore residual blanks in the middle of the screw cap are washed away. Because the inner diameters of the first through hole and the second through hole on the die base are the same, the rear punch rod can be in internal contact with the first through hole and the second through hole, the contact surface of the rear punch rod is increased, and smooth impact of the rear punch rod is ensured.

Compared with the prior art, the utility model has the beneficial effects that: the diameter of the second through hole of the die base is changed to be the same as that of the first through hole at the front end of the tungsten steel, so that the front end and the rear end of the die base are of a straight-through structure, the contact area between the rear punch and the die base is enlarged, the rear punch is ensured to be free from shaking during in-die impact, the punch breakage phenomenon is avoided, the service life of the rear punch is effectively prolonged, the equipment cost is saved, the machine adjusting time of a nut forming machine is shortened, and the processing efficiency of the nut forming machine is improved.

Drawings

The following is a further detailed description of embodiments of the utility model with reference to the drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of the operation of the present utility model;

fig. 3 is a schematic structural diagram of a stamping die in the prior art.

Marked in the figure as: the die base 1, the front end 11 of the die base, the first through hole 12, the rear end 13 of the die base, the second through hole 14, the spring mounting hole 15, the first step surface 16, the rear punch rod 2, the limiting surface 21, the front punch rod 3, the fixed seat 4, the third through hole 41, the reset spring 5 and the nut 6;

an existing die base 7, an existing die base front end 71, a small through hole 72, a large through hole 73.

Detailed Description

In the description of the present utility model, it should be noted that, for the azimuth words such as the terms "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, only for convenience of describing the present utility model and simplifying the description, but do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and should not be construed as limiting the specific protection scope of the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first", "a second" feature may explicitly or implicitly include one or more of such feature, and in the description of the present utility model, the meaning of "a number", "a number" is two or more, unless otherwise specifically defined.

See the drawings. The stamping die for the nut forming machine comprises a stamping die base 1 and a rear stamping rod 2, wherein the front end 11 of the stamping die base is made of tungsten steel, and a first through hole 12 is formed in the middle of the front end 11 of the stamping die base; the rear end 13 of the die base is provided with a second through hole 14, the positions of the first through hole 12 and the second through hole 14 are opposite, the inner diameters of the first through hole 12 and the second through hole 14 are the same, and the first through hole 12 and the second through hole 14 are in a straight-through form; and the inner diameters of the first through hole 12 and the second through hole 14 are matched with the diameter of the back punch 2, the back punch 2 is arranged in the second through hole 14, and the front end of the back punch can be inserted into the first through hole 12.

The front of the die base is provided with a front punch 3 and a fixed seat 4 for placing the front punch, a third through hole 41 is arranged in the middle of the fixed seat 4, the front punch 3 is arranged in the third through hole 41, the front punch 3 and the rear punch 2 are oppositely arranged, and the front end of the front punch 3 is inserted into a first through hole 12 at the front end of the die base.

The tail end of the second through hole 14 is provided with a spring mounting hole 15, the inner diameter of the spring mounting hole 15 is larger than that of the second through hole 14, and a first step surface 16 is formed at the junction of the spring mounting hole and the second through hole; a return spring 5 is arranged in the spring mounting hole 15, the return spring 5 is sleeved on the back flushing rod 2, one end of the return spring abuts against the first step surface 16, and the other end of the return spring abuts against the back flushing rod 2. The front end of the back punch 2 is of a hemispherical structure, the tail end of the back punch is provided with a limiting surface 21, and the diameter of the limiting surface 21 is larger than that of the back punch 2 and smaller than that of the spring mounting hole 15; the return spring 5 is abutted against the limiting surface 21 of the back punch.

During operation, the screw cap 6 is arranged in the first through hole 12 at the front end of the die base, the front punch 3 and the rear punch 2 are respectively arranged at two sides of the screw cap 6, the front punch 3 is used for limiting the movement of the screw cap, the tail end of the rear punch 2 is stressed and impacts to one side of the screw cap 6, so that residual blanks in the middle of the screw cap are washed away. Because the inner diameters of the first through hole and the second through hole on the die base are the same, the rear punch rod can be in internal contact with the first through hole and the second through hole, the contact surface of the rear punch rod is increased, and smooth impact of the rear punch rod is ensured.

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. The utility model provides a stamping die for nut make-up machine, includes die base and back punch stick, and die base front end is tungsten steel material, its characterized in that: a first through hole is formed in the middle of the front end of the die base; the rear end of the die base is provided with a second through hole, and the inner diameters of the first through hole and the second through hole are the same; the rear punch rod is arranged in the second through hole, and the front end of the rear punch rod can be inserted into the first through hole.

2. A stamping die for a nut forming machine as defined in claim 1, characterized in that: the first through hole and the second through hole are opposite, and the inner diameter is matched with the diameter of the rear punch rod.

3. A stamping die for a nut forming machine as defined in claim 1, characterized in that: the tail end of the second through hole is provided with a spring mounting hole, the inner diameter of the spring mounting hole is larger than that of the second through hole, and a first step surface is formed at the junction of the spring mounting hole and the second through hole; and a reset spring is arranged in the spring mounting hole, the reset spring is sleeved on the back punch, one end of the reset spring is propped against the first step surface, and the other end of the reset spring is propped against the back punch.

4. A stamping die for a nut forming machine as defined in claim 3, characterized in that: the tail end of the rear punch rod is provided with a limiting surface, and the diameter of the limiting surface is larger than that of the rear punch rod and smaller than the inner diameter of the spring mounting hole; the reset spring is propped against the limiting surface of the back punch.

5. A stamping die for a nut forming machine as defined in claim 1, characterized in that: the die comprises a die base, and is characterized by further comprising a front punch and a fixing seat for placing the front punch, wherein a third through hole is formed in the middle of the fixing seat, the front punch is arranged in the third through hole, the front punch and the rear punch are oppositely arranged, and the front end of the front punch is inserted into the first through hole at the front end of the die base.