CN102513438A - Method for forming pipe through hole and stamping die thereof - Google Patents

Abstract

The invention discloses a method for opening a through hole of a pipe material and a stamping die thereof. First, a gap is opened on the pipe material; the gap opened in the step A is used as a fixed point and fixed on the inner lower die with a U-shaped groove; An upper mold with a U-shaped groove covers the lower mold, so that the U-shaped grooves of the upper mold and the lower mold merge into a pipe surrounding the pipe; The pipe is opened to form a through hole. The invention is not easy to cause damage to the pipe when the through hole is opened, and the processing is more convenient and quick.

Description

A method for opening a through hole in a pipe and its stamping die

technical field

The invention relates to a method for opening a through hole and a punching die thereof, in particular to a method for opening a through hole in a pipe and the punching die thereof.

Background technique

In the processing of some pipes, it is necessary to penetrate and weld other pipes on the pipes, and at this time, it is necessary to provide through holes on the pipes. Because sometimes the size of the through-hole is large and there are few connecting parts left, it is easy to cause damage to the pipe when processing the through-hole, and in most cases, the through-hole is not perpendicular to the pipe through-hole, so the working plane is not easy to fix, giving the through-hole The processing has added many difficulties.

Contents of the invention

The object of the present invention is to provide a method for opening a pipe through hole and a stamping die thereof. It is not easy to cause damage to the pipe when the through hole is opened, and the processing is more convenient and quick.

The technical solution of the present invention: a method for opening a pipe through hole, which is characterized in that it includes the following steps:

A. Open a gap on the pipe first;

B. Use the gap opened in step A as a fixed point, and fix it on the lower mold with U-shaped groove;

C. Cover the lower mold with another upper mold with a U-shaped groove, so that the U-shaped grooves of the upper mold and the lower mold are merged into a pipe surrounding the pipe;

D. The impact column on the upper die is pressed down to open the pipe corresponding to the gap opened in step A to form a through hole.

In the above-mentioned method for opening pipe through holes, the specific method of the A step is:

Set the pipe on the solid column with a gap, and then punch the gap with a knife edge.

In the aforementioned method of opening pipe through holes, the U-shaped groove of the lower die is provided with a stud matching the notch, and the top of the stud is a plane, which is on the same plane as the upper surface of the lower die.

In the aforementioned method for opening through-holes in pipes, the upper mold and the lower mold are positioned through guide posts and guide holes.

A stamping die for opening through holes in pipes, comprising a lower die and an upper die, characterized in that: the upper end of the lower die is provided with a lower U-shaped groove, and a protruding column is arranged in the middle of the lower U-shaped groove; the upper die The lower end is provided with a lower U-shaped groove, and an impact column runs through the middle of the lower U-shaped groove. The working plane of the upper mold and the lower mold can be an inclined plane, and the two U-shaped grooves are all on this inclined plane, which are used for opening non-vertical through holes.

In the above-mentioned stamping die for opening through holes in pipes, the top of the stud is a plane, which is on the same plane as the upper surface of the lower die.

In the aforementioned stamping die for opening through holes in pipes, the lower die is provided with guide posts corresponding to the guide holes of the upper die.

In the aforementioned stamping die for opening the through-hole of the pipe, the shape of the impact column and the stud is the same as the through-section of the pipe.

Compared with the prior art, the present invention adopts a step-by-step opening method when opening a through-hole, and first opens one side of the through-hole, and uses it as a fixed fulcrum for the next step to open the other side, so the opened through-hole It is more accurate, and due to the surrounding structure of the mold, it is less likely to cause damage to the pipe. And when the working planes of the upper and lower molds are made into inclined planes, non-vertical through holes can be opened conveniently. The method and device of the invention can increase the yield of through holes by 10%, increase production efficiency by 20%, and increase production efficiency by 40% when opening through holes penetrating at a certain inclination angle.

Description of drawings

Fig. 1 is the stamping die that step A of the present invention uses;

Fig. 2 is a structural schematic diagram of a stamping die for opening pipe through holes according to the present invention;

Fig. 3 is a structural schematic diagram of the upper mold in Fig. 2 .

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but not as a basis for limiting the present invention.

Example. A method for opening a through hole in a pipe, comprising the following steps:

A. Open a gap on the pipe first;

B. Use the gap opened in step A as a fixed point, and fix it on the lower mold with U-shaped groove;

C. Cover the lower mold with another upper mold with a U-shaped groove, so that the U-shaped grooves of the upper mold and the lower mold are merged into a pipe surrounding the pipe;

D. The impact column on the upper die is pressed down to open the pipe corresponding to the gap opened in step A to form a through hole.

The concrete method of described A step is:

Set the pipe on the solid column with a gap, and then punch the gap with a knife edge.

The U-shaped groove of the lower mold is provided with a protruding post matching the notch, and the top of the protruding post is a plane, which is on the same plane as the upper surface of the lower die.

The upper mold and the lower mold are positioned through guide pillars and guide holes.

The punching die used in step A is shown in Figure 1, including a base 3, a support block 5 is provided on the base 3, a solid column 1 is vertically provided on the support block 5, a gap 2 is provided on the solid column 1, and the solid column 1 is embedded The base 2, and there is a certain gap between the two, and the base 3 is provided with a groove 4 for discharging for the gap 2.

A stamping die (for step BCD) for opening pipe through holes, as shown in Figure 2 and Figure 3, includes a lower die 6 and an upper die 10, and the upper end surface of the lower die 6 is provided with a lower U-shaped groove 7 , The middle of the lower U-shaped groove 7 is provided with a protruding column 8; the lower end of the upper mold 10 is provided with a lower U-shaped groove 12, and the middle of the lower U-shaped groove 12 is penetrated by an impact column 11. The top of the stud 8 is a plane, which is on the same plane as the upper surface of the lower mold 6 . The lower mold 6 is provided with a guide post 9 corresponding to the guide hole of the upper mold 10 . The shape of the impact column 11 and the protruding column 8 is the same as the through-section of the pipe.

Claims (8)

1. A method of offering pipe through holes, characterized in that, comprising the following steps: A. Open a gap on the pipe first; B. Use the gap opened in step A as a fixed point, and fix it on the lower mold with U-shaped groove; C. Cover the lower mold with another upper mold with a U-shaped groove, so that the U-shaped grooves of the upper mold and the lower mold are merged into a pipe surrounding the pipe; D. The impact column on the upper die is pressed down to open the pipe corresponding to the gap opened in step A to form a through hole. 2. The method for opening pipe through holes according to claim 1, characterized in that: the specific method of the step A is: Set the pipe on the solid column with a gap, and then punch the gap with a knife edge. 3. The method for opening pipe through-holes according to claim 1, characterized in that: the U-shaped groove of the lower die is provided with a protruding post that fits the notch, and the top of the protruding post is a plane that is aligned with the upper surface of the lower die. on a flat surface. 4. The method for opening through-holes in pipes according to claim 1, characterized in that: the upper die and the lower die are positioned through guide posts and guide holes. 5. A stamping die for opening through holes in pipes, comprising a lower die (6) and an upper die (10), characterized in that: the upper end surface of the lower die (6) is provided with a lower U-shaped groove (7), A protruding column (8) is arranged in the middle of the lower U-shaped groove (7); a lower U-shaped groove (12) is arranged at the lower end of the upper mold (10), and an impact column (11) runs through the middle of the lower U-shaped groove (12). 6. The stamping die for opening through holes in pipes according to claim 5, characterized in that: the top of the stud (8) is a plane, which is on the same plane as the upper surface of the lower die (6). 7. The stamping die for opening through holes in pipes according to claim 5, characterized in that: the lower die (6) is provided with guide posts (9) corresponding to the guide holes of the upper die (10). 8. The stamping die for opening through-holes in pipes according to claim 5, characterized in that: the shape of the impact column (11) and the protruding column (8) is the same as the through-section of the pipe.

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