CN214814060U

CN214814060U - Steel is dashed and is pulled out bottle bottom forming device

Info

Publication number: CN214814060U
Application number: CN202121168004.2U
Authority: CN
Inventors: 胥少东; 刘佳棋; 尚国明; 张亚涛; 孙志伟
Original assignee: Kuancheng Tianhai Pressure Vessel Co ltd
Current assignee: Kuancheng Tianhai Pressure Vessel Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-11-23
Anticipated expiration: 2031-05-28

Abstract

The utility model discloses a steel punching bottle bottom forming device, which comprises a female die, a tray, a material block and a punch; the female die is provided with an inner cavity, and the shape of the inner wall of the inner cavity is matched with the outer side wall of the bottom of the punching and drawing bottle; the tray is arranged at the bottom of the inner cavity; the shape of the top surface of the tray is matched with the outer bottom surface of the bottom of the punching bottle; the vertical edge of the material block is in contact with the inner wall of the inner cavity; the bottom surface shape of the punch is matched with the inner bottom surface of the bottom of the punching and drawing bottle, and the side wall shape of the punch is matched with the inner side wall of the bottom of the punching and drawing bottle. The shape of the material block in the utility model is a polygon prism, and each vertical edge contacts with the cavity of the female die to form multilateral positioning, and the shapes of the bottom of the punch and the top of the tray are respectively matched with the inner bottom surface and the outer bottom surface of the bottom of the bottle blank, so that the material block can be formed at one time, and the problem of easy cracking of secondary forming is avoided; the bottle blank is effectively fixed, the deviation is reduced as much as possible, and the aim of uniform wall thickness in the punching forming process is fulfilled.

Description

Steel is dashed and is pulled out bottle bottom forming device

Technical Field

The utility model relates to a field is made to seamless gas cylinder of steel in the pressure vessel trade, especially relates to a steel dashes and pulls out bottle bottom forming device.

Background

At present, a steel seamless gas cylinder is mainly produced by two production modes, one mode is formed by closing and spinning two ends of a seamless steel tube (a tube-made cylinder for short), and the other mode is formed by punching, drawing and then spinning one end of a square steel block by a hydraulic press (a drawn cylinder for short). At present, the bottom of a bottle blank of a punched bottle is formed by a vertical punching hydraulic press through the reverse extrusion forming of a punch, a female die and a tray, and then the bottom of the bottle blank is pushed into a bottom structure with a concave surface shape through a three-core concave bottom die after the bottle blank is stretched by a horizontal stretching hydraulic press, and the bottle blank has the defects that: the vertical punching hydraulic press deflects under the influence of factors such as temperature, load and the like during the working process of the punch through the reverse extrusion forming process of the punch, the female die and the tray, so that the wall thickness is deviated and uneven; when the horizontal stretching hydraulic press is used for drawing and forming the concave bottom, the bottom is easy to deform and crack.

Therefore, a steel bottle bottom punching and drawing forming device which has small offset and can be formed at one time is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a steel dashes and pulls out bottle bottom forming device solves and dashes now and pulls out the problem that easy skew and post forming easily lead to the bottom fracture among the bottle forming process.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model relates to a steel dashes and pulls out bottle bottom forming device, include

A female die for forming the bottom of the punching and pulling bottle; the female die is provided with an inner cavity, and the shape of the inner wall of the inner cavity is matched with the outer side wall of the bottom of the punching and drawing bottle;

the tray is arranged at the bottom of the inner cavity; the shape of the top surface of the tray is matched with the outer bottom surface of the bottom of the punching bottle;

a polygonal columnar block disposed within the interior cavity; the vertical edge of the material block is in contact with the inner wall of the inner cavity;

and a punch; the bottom surface shape of the punch is matched with the inner bottom surface of the bottom of the punching and drawing bottle, and the side wall shape of the punch is matched with the inner side wall of the bottom of the punching and drawing bottle.

Further, the cross section of the block is a regular polygon, and the vertexes of the block are provided with round corners.

Still further, the cross section of the material block is a regular quadrangle, and the four top points are provided with round corners.

Still further, the upper portion of the inner cavity has a draft angle.

Furthermore, the bottom of the female die is provided with a demoulding hole which is communicated with the inner cavity, and the diameter of the demoulding hole is smaller than that of the inner cavity; the bottom of the tray is provided with a positioning block which is matched with the demoulding hole.

Compared with the prior art, the utility model discloses a beneficial technological effect as follows:

the shape of the material block in the utility model is a polygon prism, and each vertical edge contacts with the cavity of the female die to form multilateral positioning, and the shapes of the bottom of the punch and the top of the tray are respectively matched with the inner bottom surface and the outer bottom surface of the bottom of the bottle blank, so that the material block can be formed at one time, and the problem of easy cracking of secondary forming is avoided; the bottle blank is effectively fixed, the deviation is reduced as much as possible, the aim of uniform wall thickness in the punching forming process is fulfilled, the detailed size and shape of each part of the bottom can be controlled more accurately and effectively, the weight of the gas bottle is reduced, and the stress strength of the bottom of the bottle body is improved.

Drawings

The present invention will be further explained with reference to the following description of the drawings.

FIG. 1 is a schematic view of the steel punch-out bottle bottom molding device of the present invention before molding;

FIG. 2 is a schematic view of the matching between the material block and the female die of the present invention;

FIG. 3 is a schematic view of the steel punch-out bottle bottom molding device of the present invention after molding;

description of reference numerals: 1. a female die; 2. an inner cavity; 3. a tray; 4. a material block; 5. a punch; 6. a bottle blank; 7. demoulding holes; 8. and (5) positioning the blocks.

Detailed Description

As shown in fig. 1-3, a bottom forming device for a steel drawn bottle comprises a female die 1, a tray 3, a material block 4 and a punch 5. The die 1 is used for forming the bottom of a punched bottle, the die 1 is provided with an inner cavity 2, a tray 3 is placed at the bottom of the inner cavity 2, a material block 4 is placed in the inner cavity 2 and located above the tray, and a punch 5 is pressed to the inner cavity 2 under the action of a vertical punching hydraulic press. The inner wall shape of the inner cavity 2 is matched with the outer side wall of the bottom of the punching and pulling bottle, the top surface shape of the tray 3 is matched with the outer bottom surface of the bottom of the punching and pulling bottle, the bottom surface shape of the punch 5 is matched with the inner bottom surface of the bottom of the punching and pulling bottle, and the side wall shape of the punch 5 is matched with the inner side wall of the bottom of the punching and pulling bottle.

The material block 4 is in the shape of a polygon prism, the side edges of the material block are rounded, and the vertical edge of the material block 4 is in contact with the inner wall of the inner cavity 2. In this embodiment, the cross section of the material block 4 is a regular quadrangle, that is, the material block in this embodiment is a regular quadrangular prism, R25 rounding is performed on four vertical side edges, and the round corners are in contact with the inner wall of the inner cavity to form four-corner positioning. In the punch pressing process, the bottle blank 6 with the bottom structure shape consistent with the designed shape of the bottom of the product can be realized at one time, the bottle blank is effectively fixed, the punching mode in the drilling process is similar to the proofing punching mode, the punch moves along the set direction, the deviation is reduced as much as possible, and the aim of uniform wall thickness in the punching forming process is fulfilled.

In this embodiment, the diameter of the upper opening of the inner cavity 2 gradually increases upward to form a draft angle, so that the bottle blank 6 can be taken out conveniently. The bottom of the female die 1 is provided with a demoulding hole 7, the demoulding hole 7 is communicated with the inner cavity 2, and the diameter of the demoulding hole 7 is smaller than that of the inner cavity 2, so that the inner cavity forms a through hole which is communicated up and down, force can be applied from the demoulding hole conveniently, and the bottle blank can be taken out upwards. The bottom of the tray 3 is provided with a positioning block 8, the positioning block 8 is matched with the demoulding hole 7, and the tray is placed at the bottom of the inner cavity during use, so that the positioning block is clamped in the demoulding hole to form positioning in the horizontal direction, thereby not only facilitating replacement of the tray, but also preventing the tray from horizontally shaking.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.

Claims

1. The utility model provides a bottle bottom forming device is drawn to steel dashes which characterized in that: comprises that

A concave die (1) for forming the bottom of the punching and drawing bottle; the female die (1) is provided with an inner cavity (2), and the shape of the inner wall of the inner cavity (2) is matched with the outer side wall of the bottom of the punching and drawing bottle;

the tray (3) is arranged at the bottom of the inner cavity (2); the shape of the top surface of the tray (3) is matched with the outer bottom surface of the bottom of the punching bottle;

a polygonal prism-shaped block (4) placed in the inner cavity (2); the vertical edge of the material block (4) is in contact with the inner wall of the inner cavity (2);

and a punch (5); the bottom surface shape of the punch (5) is matched with the inner bottom surface of the bottom of the punching and pulling bottle, and the side wall shape of the punch (5) is matched with the inner side wall of the bottom of the punching and pulling bottle.

2. The steel drawn bottle bottom molding device of claim 1, wherein: the cross section of the material block (4) is a regular polygon, and the vertex of the material block is provided with a round angle.

3. The steel drawn bottle bottom molding device of claim 2, wherein: the cross section of the material block (4) is a regular quadrangle, and the four top points are provided with round corners.

4. The steel drawn bottle bottom molding device of claim 1, wherein: the upper part of the inner cavity (2) is provided with a draft angle.

5. The steel drawn bottle bottom molding device of claim 1, wherein: the bottom of the female die (1) is provided with a demoulding hole (7), the demoulding hole (7) is communicated with the inner cavity (2), and the diameter of the demoulding hole (7) is smaller than that of the inner cavity (2); the bottom of the tray (3) is provided with a positioning block (8), and the positioning block (8) is matched with the demoulding hole (7).