CN214517187U

CN214517187U - Pressure head die for square thin-wall pipe

Info

Publication number: CN214517187U
Application number: CN202120045788.3U
Authority: CN
Inventors: 闫晓东; 叶蔚; 狄崇庆
Original assignee: GRIMN Engineering Technology Research Institute Co Ltd
Current assignee: GRIMN Engineering Technology Research Institute Co Ltd
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2021-10-29
Anticipated expiration: 2031-01-08

Abstract

A ram die for square thin walled tubing comprising: the upper die, the lower die and the material guide plate; the upper die comprises an upper die plate, the lower end of the upper die plate is provided with at least one group of square cores and boss cores which are arranged at intervals, and a square groove is formed between each square core and each boss core; the lower die comprises a lower die plate, at least one group of square grooves and inverted concave grooves which are arranged at intervals are formed in the upper end of the lower die plate, and square bulges are formed between the square grooves and the inverted concave grooves; the square core and the boss-shaped core of the upper template are respectively inserted into the square groove and the inverted concave groove of the lower template, and the square bulge of the lower template is inserted into the square groove of the upper template; the lower template is connected with one end of the material guide plate. The utility model discloses a tubular product tip appearance rule of mould processing, easy overmould, easy centre gripping, draw steadily, effectively improve square pipe and draw the quality.

Description

Pressure head die for square thin-wall pipe

Technical Field

The utility model belongs to the technical field of the tubular product processing, concretely relates to pressure head mould for square thin wall tubular product.

Background

The square thin-wall pipe has the advantages of light weight, high rigidity, low cost, good energy absorption effect and the like, and is widely applied to the fields of rail transit, energy, chemical engineering, aerospace and the like. Before drawing, the end of the square thin-walled tube needs to be reduced so that the end of the tube blank can smoothly pass through a drawing die hole, and the tube diameter and the wall thickness meeting the tube process requirements are obtained. At present, the commonly used square pipe necking process comprises processing means such as rolling, rotary swaging and special pipe necking equipment. The end of the thin-walled tube blank is plastically deformed by a rolling mill or a rotary forging mill, and the cross section of the end of the formed tube blank is approximately circular. The method has the problems of large equipment investment, wide occupied area, noise pollution and the like, and the section of the end part of the final pipe is approximately circular, so that the pipe is not stably clamped by a traction clamp during drawing; the special pipe reducing equipment needs to be added with new equipment investment.

Disclosure of Invention

To the not enough of above-mentioned prior art existence, the utility model provides a pressure head mould for square thin wall tubular product.

The utility model discloses a realize through following technical scheme.

A ram die for square thin walled tubing, the die comprising: the device comprises an upper die (1), a lower die (2) and a material guide plate (3); the upper die (1) comprises an upper die plate, the lower end of the upper die plate is provided with at least one group of square cores (4) and boss-shaped cores (5) which are arranged at intervals, and a square groove is formed between each square core (4) and each boss-shaped core (5); the lower die (2) comprises a lower die plate, at least one group of square grooves (6) and inverted concave grooves (7) which are arranged at intervals are formed in the upper end of the lower die plate, and square protrusions (8) are formed between the square grooves (6) and the inverted concave grooves (7); the square core (4) and the boss-shaped core (5) of the upper template are respectively inserted into the square groove (6) and the inverted groove (7) of the lower template, and the square bulge (8) of the lower template is inserted into the square groove of the upper template; the lower template is connected with one end of the material guide plate (3).

Furthermore, the material guide plate (3) comprises a square plate, a plurality of rows of positioning pin holes (9) or a plurality of parallel square grooves are formed in the square plate, positioning pins are inserted into the positioning pin holes (9), a feeding channel (10) is formed between every two rows of positioning pin holes, and the plurality of feeding channels (10) are respectively connected with the square grooves (6) and the inverted concave grooves (7) of the lower template; or the square grooves on the square plate are respectively communicated with the square groove (6) and the inverted concave groove (7) of the lower template.

Furthermore, an elastic pad (11) is arranged between the upper end of the square bulge (8) of the lower template and the square groove of the upper template.

Furthermore, the convex part of the boss-shaped mold core (5) is in an inverted trapezoid shape or the side edge of the convex part is in an arc shape.

Furthermore, the convex part of the inverted concave groove (7) is in an inverted trapezoid shape or the side edge of the inverted concave groove is in an arc shape.

Further, the relationship between the distance H (x1) between the lower end of the boss-shaped core (5) of the upper template and the inner bottom of the inverted concave groove (7) of the lower template and the length L (a) of the longer side of the pressure head after the square thin-wall tube is finally formed is as follows: h (x1) is 0.80-0.95L (a).

Furthermore, the groove width M (x2) of the square groove (6) of the lower template is 1.05-1.2H (x 1).

Further, the relation between the distance H (x2) between the lower end of the square core (4) of the upper template and the inner bottom of the square groove (6) of the lower template and the length L (b) of the shorter side of the pressure head after the final forming of the square thin-wall pipe is as follows: h (x2) is 0.95-1.0L (b).

The utility model has the advantages of the technical effect, the utility model provides a pressure head mould for square thin wall tubular product, simple structure, low in manufacturing cost. The processed pipe end has regular appearance, easy passing through a die, easy clamping and stable drawing, and the drawing quality of the square pipe is effectively improved; the problems of large investment, wide occupied area and the like of the conventional square thin-walled tube necking equipment or device can be solved, and the market requirements of effectively improving the field operation environment and being easy to produce, manufacture and popularize are met.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a top view of the present invention.

Fig. 3 is a sectional view taken along line a-a of fig. 2.

Fig. 4 is a sectional view taken along line B-B of fig. 2.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 4, a ram die for a square thin-walled tube includes: an upper die 1, a lower die 2 and a material guide plate 3; the upper die 1 comprises an upper die plate, the lower end of the upper die plate is provided with at least one group of square cores 4 and boss cores 5 which are arranged at intervals, the convex part of the boss core 5 faces downwards, and a square groove is formed between the square core 4 and the boss core 5; the lower die 2 comprises a lower die plate, at least one group of square grooves 6 and inverted concave grooves 7 which are arranged at intervals are arranged at the upper end of the lower die plate, and square bulges 8 are formed between the square grooves 6 and the inverted concave grooves 7; the square core 4 and the boss-shaped core 5 of the upper template are respectively inserted into the square groove 6 and the inverted groove 7 of the lower template, and the square bulge 8 of the lower template is inserted into the square groove of the upper template; the lower template is connected with one end of the material guide plate 3, and can be in threaded connection or fixed by a pressing plate, and the guide plate 3 is used for feeding materials in a matching manner.

Further, the material guide plate 3 comprises a square plate, a plurality of rows of positioning pin holes 9 (each row of positioning pin holes can be 2) or a plurality of parallel square grooves are arranged on the square plate, the positioning pin holes 9 are cylindrical positioning pin holes or conical positioning pin holes, positioning pins are inserted into the positioning pin holes 9, a feeding channel 10 is formed between each two rows of positioning pin holes, and the plurality of feeding channels 10 are respectively connected with the square grooves 6 and the inverted concave grooves 7 of the lower template; or the plurality of square grooves on the square plate are respectively communicated with the square groove 6 and the inverted concave groove 7 of the lower template.

An elastic pad 11 is arranged between the upper end of the square bulge 8 of the lower template and the square groove of the upper template.

The convex part of the boss-shaped mold core 5 is in the shape of an inverted trapezoid or the side edge is in the shape of an arc, and the convex part of the inverted concave groove 7 is in the shape of an inverted trapezoid or the side edge is in the shape of an arc. The arc transition between the pressed part and the non-pressed part of the pipe is ensured, the pipe is effectively prevented from being greatly deformed or broken, and the service life of the die is prolonged. The raised portion may also be a curved structure.

The relationship between the distance H (x1) between the lower end of the boss-shaped core 5 of the upper template and the inner bottom of the inverted concave groove 7 of the lower template and the length L (a) of the longer side of the pressure head after the final forming of the square thin-wall pipe is as follows: h (x1) ═ 0.80-0.95L (a); the size of the square pipe processed by the first step meets the process requirement range, and meanwhile, the service life of the die is prolonged.

The groove width M (x2) of the square groove 6 of the lower template is 1.05-1.2H (x 1). After the square pipe is processed by the first step, the square pipe can be smoothly processed by the second step after being turned for 90 degrees, so that the final forming size of the square pipe is ensured to meet the process requirement range.

The relationship between the distance H (x2) between the lower end of the square core 4 of the upper template and the inner bottom of the square groove 6 of the lower template and the length L (b) of the shorter side of the pressure head after the square thin-wall pipe is finally formed is as follows: h (x2) is 0.95-1.0L (b). And ensuring that the size of the square pipe processed by the second step meets the process requirement range.

When the pressure head die is used, the square thin-walled tube is placed between the two rows of positioning pin holes 9 of the material guide plate 3 or in the square groove and then extends into the inverted groove 7 of the lower die plate, and when the upper die 1 moves downwards, the first step of pressure head processing is carried out on the end part of the thin-walled tube. And after the downward movement of the upper die 1 is finished, the upper die moves upwards immediately, then the pipe processed in the first working step is taken out, the pipe is placed in the middle of another two rows of positioning pin holes 9 or in the square groove of the material guide plate 9 after being turned for 90 degrees and extends into the square groove 6 of the lower die plate, and when the upper die 1 moves downwards again, the end part of the pipe is processed by a second working step pressure head. And after the downward movement of the upper die 1 is finished, the upper die moves upward immediately, and the pipe processed in the second step is taken out, namely the pipe formed by the final pressure head.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention. It should be noted that other modifications and equivalents may be made by those skilled in the art in light of the teachings of the present disclosure to achieve the same purpose, and should be construed as within the scope of the present disclosure.

Claims

1. A ram die for square thin walled tubing, the die comprising: the device comprises an upper die (1), a lower die (2) and a material guide plate (3); the upper die (1) comprises an upper die plate, the lower end of the upper die plate is provided with at least one group of square cores (4) and boss-shaped cores (5) which are arranged at intervals, and a square groove is formed between each square core (4) and each boss-shaped core (5); the lower die (2) comprises a lower die plate, at least one group of square grooves (6) and inverted concave grooves (7) which are arranged at intervals are formed in the upper end of the lower die plate, and square protrusions (8) are formed between the square grooves (6) and the inverted concave grooves (7); the square core (4) and the boss-shaped core (5) of the upper template are respectively inserted into the square groove (6) and the inverted groove (7) of the lower template, and the square bulge (8) of the lower template is inserted into the square groove of the upper template; the lower template is connected with one end of the material guide plate (3).

2. The die according to claim 1, wherein the material guide plate (3) comprises a square plate, the square plate is provided with a plurality of rows of positioning pin holes (9) or a plurality of parallel square grooves, positioning pins are inserted into the positioning pin holes (9), a feeding channel (10) is formed between every two rows of positioning pin holes, and the plurality of feeding channels (10) are respectively connected with the square grooves (6) and the inverted concave grooves (7) of the lower die plate; or the square grooves on the square plate are respectively communicated with the square groove (6) and the inverted concave groove (7) of the lower template.

3. The die according to claim 1, characterized in that an elastic cushion (11) is arranged between the upper end of the square bulge (8) of the lower die plate and the square groove of the upper die plate.

4. Mould according to claim 1, characterized in that the convex part of the boss-shaped core (5) is of inverted trapezoidal shape or curved on its sides.

5. Mould according to claim 1, characterized in that the raised portion of the inverted-concave groove (7) is inverted trapezoidal or curved on its sides.

6. The die according to claim 1, wherein the relationship between the distance H (x1) between the lower end of the boss-shaped core (5) of the upper die plate and the inner bottom of the inverted concave groove (7) of the lower die plate and the length L (a) of the longer side of the pressure head after the square thin-walled tube is finally formed is as follows: h (x1) is 0.80-0.95L (a).

7. The die of claim 6, wherein the square groove (6) of the lower die plate has a width M (x2) of 1.05-1.2H (x 1).

8. The die according to claim 1, wherein the distance H (x2) between the lower end of the square core (4) of the upper die plate and the inner bottom of the square groove (6) of the lower die plate and the length L (b) of the shorter side of the pressure head after the square thin-walled tube is finally formed are in the following relation: h (x2) is 0.95-1.0L (b).