CN212822115U

CN212822115U - Head pipe punching precision stamping die

Info

Publication number: CN212822115U
Application number: CN202021083798.8U
Authority: CN
Inventors: 刘永成
Original assignee: Wuxi Chengwei Vehicle Parts Co ltd
Current assignee: Wuxi Chengwei Vehicle Parts Co ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-03-30
Anticipated expiration: 2030-06-12

Abstract

The utility model discloses a head pipe punching precision stamping die, which comprises an upper punch and a lower positioning column, wherein the lower positioning column is horizontally arranged in a cylindrical shape, and the upper surface of the lower positioning column is provided with a vertical circular stamping groove; the upper punch is vertically arranged in a cylindrical shape, and the upper punch and the circular punching groove are on the same vertical line; the lower end of the upper punch is V-shaped, the bottom of the upper punch is inwards provided with a lower groove in an inwards concave mode, the V-shaped lower end of the upper punch is cut off from the lower groove to form two punching tip ends, and the two punching tip ends are arranged along the axis direction of the lower positioning column. The utility model discloses a punching press of drift to head pipe punches effectually, and stamping die's long service life.

Description

Head pipe punching precision stamping die

Technical Field

The utility model relates to an electric motor car head pipe processing field especially relates to a head pipe precision stamping die that punches.

Background

The electric vehicle head tube is one of important parts in an electric vehicle frame, and the upper end and the lower end of the head tube are respectively connected with a steering handle and a front fork of an electric vehicle. At the in-process of carrying out processing to electric motor car head pipe, need punch to the head pipe, traditional punching press is punched the drift of usefulness and is had that the stamping forming effect is poor, and some row's problems such as burr and life are short easily produce, especially are used for the cover to establish the reference column of head pipe, easily take place the fracture in the pushing down of drift punches, consequently current head pipe mould of punching still has the space of improving.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the not enough of existence among the prior art, the utility model provides a head pipe precision stamping die that punches promotes the punching press effect of drift to head pipe to stamping die's life is longer.

The technical scheme is as follows: in order to achieve the purpose, the utility model discloses a head pipe punching precision stamping die, which comprises an upper punch and a lower positioning column, wherein the lower positioning column is horizontally arranged and cylindrical, and the upper surface of the lower positioning column is provided with a vertical circular stamping groove; the upper punch is vertically arranged in a cylindrical shape, and the upper punch and the circular punching groove are on the same vertical line; the lower end of the upper punch is V-shaped, the bottom of the upper punch is inwards provided with a lower groove in an inwards concave mode, the V-shaped lower end of the upper punch is cut off from the lower groove to form two punching tip ends, and the two punching tip ends are arranged along the axis direction of the lower positioning column.

Furthermore, a tip groove is inwards recessed from the stamping tip, the cross section of the tip groove is an isosceles trapezoid, and the lower bottom edge of the isosceles trapezoid is longer than the upper bottom edge.

Furthermore, two side surfaces of the stamping tip are stamping contact surfaces, and a plurality of sawtooth grooves are formed in the stamping contact surfaces.

Further, the sawtooth groove extends along the axial direction of the lower positioning column; the plurality of sawtooth grooves are arranged on the stamping contact surface from bottom to top and are gradually and tightly arranged; the cross section of the sawtooth groove is triangular, and the groove wall of one side of the triangular sawtooth groove far away from the punching tip is a vertical groove wall.

Further, the vertical section of the lower groove along the direction perpendicular to the axis of the lower positioning column is circular or elliptical.

Furthermore, a vertical hard stamping ring is embedded in the circular stamping groove, and the upper surface of the hard stamping ring is flush and tangent with the outer arc surface of the lower positioning column; the diameter of the inner ring of the hard stamping ring is equal to that of the upper punch, and the upper punch is matched with the hard stamping ring in an inserted manner.

Furthermore, the lower positioning column is made of 45 steel, and the hard stamping ring is made of tungsten steel.

Has the advantages that: the utility model discloses a head pipe precision stamping die that punches, the lower extreme of upper punch is V font, and the lower extreme of upper punch has formed two punching press pointed ends after cutting the low groove, and the punching press pointed end is equipped with the pointed end groove, and the both sides face of punching press pointed end is provided with the sawtooth groove, and two punching press pointed ends contact punching with the head pipe earlier, have reduced the area of contact of drift and head pipe, and the difficult lower reference column fracture that leads to of comparison with traditional drift, then tear the rest of head pipe and pull off with the help of pointed end groove and sawtooth groove; the hard stamping ring is embedded in the circular stamping groove, so that the strength of the lower positioning column is improved, and the service life of the die is longer.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a rigid stamped ring structure;

FIG. 3 is a schematic structural view of the lower end of the upper punch;

fig. 4 is a schematic plan view of the lower end of the upper punch.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The precise punching die for punching the head pipe comprises an upper punch 1 and a lower positioning column 2, wherein the lower positioning column 2 is horizontally arranged and cylindrical, the outer diameter of the cylindrical shape is equal to the inner diameter of the head pipe needing punching, and the head pipe sleeve is arranged on the lower positioning column 2 during punching to play roles of positioning and fixing. And the upper surface of the lower positioning column 2 is provided with a vertical circular stamping groove 3. The upper punch 1 is vertically arranged in a cylindrical shape, the upper punch 1 and the circular stamping groove 3 are on the same vertical line, and the upper punch 1 is pressed into the stamping groove 3 to punch the surface of the head pipe.

The lower end of the upper punch 1 is V-shaped, the bottom of the upper punch 1 is inwards concavely provided with a lower groove 4, the V-shaped lower end of the upper punch 1 is cut off the lower groove 4 to form two punching tip ends 5, and the two punching tip ends 5 are arranged along the axial direction of the lower positioning column 2. When the upper punch 1 is pressed downwards for punching, the punching tip 5 is firstly contacted with the head pipe, at the moment, the upper punch 1 and the head pipe only have two contact points and can puncture the head pipe, then the side surface of the punching tip 5 is contacted with the surface of the head pipe, the metal material in the area to be punched on the head pipe is torn down, and finally punching is finished. If the lower end of the upper punch 1 is horizontal, the contact area between the upper punch 1 and the head pipe is large at the beginning, and the surface of the head pipe cannot be pierced, so that a large force is applied to the lower positioning column 2, and the lower positioning column 2 is very likely to be broken.

The indent of punching press most advanced 5 is equipped with tip groove 6, the cross section of tip groove 6 is isosceles trapezoid, and the trapezoidal lower base of equal waist is good at the base, and sharp-pointed punching press most advanced 5 is easily worn and torn at punching press in-process, influences the punching press effect, and the angle of punching press most advanced 5 has been reduced in the setting of tip groove 6, has improved the life of punch 1, and just most advanced groove 6 changes the surface of withholding the head pipe, changes and tears the metal material who treats the region of punching on the head pipe and pull.

The both sides face of punching press pointed end 5 is punching press contact surface 7, be provided with a plurality of sawtooth grooves 8 on the punching press contact surface 7, the setting of sawtooth groove 8 can increase the frictional force on punching press contact surface 7 and head pipe surface, can be effectively with waiting to punch the regional metal material drive of punching and tear the pull down behind the surface of head pipe, the completion punches to the punching press of head pipe.

The sawtooth groove 8 extends along the axial direction of the lower positioning column 2; the plurality of sawtooth grooves 8 are arranged on the stamping contact surface 7 from bottom to top and are gradually compact, the upper end of the stamping contact surface 7 is far away from the stamping tip 5, and the more compact sawtooth grooves 8 are needed to tear the surface of the head pipe. The cross section of the sawtooth groove 8 is triangular, the groove wall of one side, away from the punching tip 5, of the triangular sawtooth groove 8 is a vertical groove wall, the triangular sawtooth groove 8 is equivalent to a small sharp prick formed on the punching contact surface 7, and as shown in attached figures 3 and 4, the sharp prick can pierce the surface of a head pipe, so that a metal material in a region to be punched can be torn off more easily.

The vertical cross-sectional shape of the lower groove 4 along the direction perpendicular to the axis of the lower positioning column 2 is circular or oval, so that the upper end surface of the upper punch 1 is regular, the punching effect is good, the contact area between the lower end of the upper punch 1 and a head pipe is gradually reduced from bottom to top, the tearing effect is good as shown in figure 3, and the edge of a forming hole of the head pipe can be more smooth.

A vertical hard stamping ring 9 is embedded in the circular stamping groove 3, and the upper surface of the hard stamping ring 9 is flush and tangent with the outer arc surface of the lower positioning column 2; the diameter of the inner ring of the hard stamping ring 9 is equal to that of the upper punch 1, and the upper punch 1 is matched with the hard stamping ring 9 in an inserted connection mode. The hard stamping ring 9 replaces the circular stamping groove 3 and the upper punch 1 to be matched for punching, the hard stamping ring 9 is not easy to wear, the service life of the lower positioning column 2 can be prolonged, and materials can be saved.

The lower positioning column 2 is made of 45 steel, and the hard stamping ring 9 is made of tungsten steel.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. The utility model provides a head pipe precision stamping die that punches which characterized in that: the punching die comprises an upper punching head (1) and a lower positioning column (2), wherein the lower positioning column (2) is horizontally arranged in a cylindrical shape, and a vertical circular punching groove (3) is formed in the upper surface of the lower positioning column (2); the upper punch head (1) is vertically arranged in a cylindrical shape, and the upper punch head (1) and the circular punching groove (3) are on the same vertical line; the lower end of the upper punch (1) is V-shaped, a lower groove (4) is formed in the bottom of the upper punch (1) in a concave mode, the lower groove (4) is cut off from the V-shaped lower end of the upper punch (1) to form two punching tip ends (5), and the two punching tip ends (5) are arranged along the axis direction of the lower positioning column (2).

2. The head pipe punching precision stamping die of claim 1, wherein: the stamping tip (5) is inwards concave with a tip groove (6), the cross section of the tip groove (6) is isosceles trapezoid, and the lower bottom edge of the isosceles trapezoid is longer than the upper bottom edge.

3. The head pipe punching precision stamping die of claim 1, wherein: the two side surfaces of the stamping tip (5) are stamping contact surfaces (7), and a plurality of sawtooth grooves (8) are formed in the stamping contact surfaces (7).

4. The head pipe punching precision stamping die of claim 3, wherein: the sawtooth groove (8) extends along the axial direction of the lower positioning column (2); the plurality of sawtooth grooves (8) are arranged on the stamping contact surface (7) from bottom to top and are gradually and tightly arranged; the cross section of the sawtooth groove (8) is triangular, and the groove wall of one side of the sawtooth groove (8) far away from the punching tip (5) is a vertical groove wall.

5. The head pipe punching precision stamping die of claim 1, wherein: the vertical section of the lower groove (4) along the direction vertical to the axis of the lower positioning column (2) is circular or elliptical.

6. The head pipe punching precision stamping die of claim 1, wherein: a vertical hard stamping ring (9) is embedded in the circular stamping groove (3), and the upper surface of the hard stamping ring (9) is flush and tangent with the outer arc surface of the lower positioning column (2); the inner ring diameter of stereoplasm stamping ring (9) with the diameter of top punch (1) equals, top punch (1) with stereoplasm stamping ring (9) cooperation is pegged graft.

7. The head pipe punching precision stamping die of claim 6, wherein: the lower positioning column (2) is made of 45 steel, and the hard stamping ring (9) is made of tungsten steel.