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Compression pipe forming method

A technology for forming tubes and forming cavities, which is applied in the field of technology and can solve the problems of uneven deformation and uneven unevenness of tube blanks

Active Publication Date: 2021-09-10
佛山市永恒液压机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. When the tube blank is deformed, it is constantly restricted by the circular arc cavity, resulting in uneven deformation of the tube blank, and there is a problem of unevenness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] see Figure 1-Figure 3 , a pressing tube forming device, comprising a mold and punches arranged on both sides of the mold, the mold is provided with a cavity matching the appearance of the pressing tube, and the cavity includes a mold for forming the pressing tube The forming part of the sealed tube body; the punch includes a flaring section 1 for easy entry into the tube blank, a low-pressure sealing section 2 for low-pressure pre-expansion of the tube blank, and a high-pressure expansion type for the tube blank. The high-pressure sealing section 5 and the annular body 3 connected with the high-pressure sealing end; the high-pressure sealing section 5 includes a molding surface 4, and the molding surface 4 is located at the front end of the annular body 3, and it is characterized in that the molding surface 4 and the molding The part forms a rectangular molding cavity 10.

[0033] see Figure 1-Figure 3 , the forming portion includes a radial forming surface 6 arrang...

Embodiment 2

[0042] see Figure 4-Figure 5 The difference between this embodiment and Embodiment 1 is that an annular accommodation groove 11 for accommodating the end of the tube blank is formed between the low-pressure sealing section 2 and the high-pressure sealing section 5, and the annular body 3 corresponds to the annular accommodation groove 11. The groove 11 surrounds the low-pressure sealing section 2 , and the forming surface 4 is arranged at the front end of the annular body 3 . The annular accommodation groove 11 of the above-mentioned structure is provided. When forming the double-card press tube, the end of the tube blank is inserted into the annular accommodation groove 11 and pressed against the bottom of the annular accommodation groove 11. Since the forming surface 4 is located at the front end of the annular body 3, After the forming surface 4 is in place, there is a certain distance between the end of the tube blank and the circular arc cavity, so there is an end distan...

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Abstract

The invention discloses a compression pipe forming method. The compression pipe forming method comprises the following steps that (1) a to-be-machined pipe blank is carried to a fixed mold; (2) the movable mold is driven to move towards the fixed mold, and mold locking of the movable mold and the fixed mold is completed; (3) punches on the two sides are driven to enter an inner cavity of the pipe blank from the two ends of the pipe blank, and low-pressure pre-expansion is conducted on the pipe blank; (4) the two punches are driven to continue to move oppositely, so that the root of the high-pressure sealing section abuts against the end part of the pipe blank; (5) the two bottom corners, close to the pipe blank, of a rectangular forming cavity abut against the pipe blank, a high-pressure liquid medium is introduced, and the part, located between the two bottom corners of the forming cavity, of the pipe blank is naturally and smoothly bent and formed in the direction of the forming cavity; and (6) the high-pressure liquid medium continues to be introduced, so that the pipe blank continuously deforms in the forming cavity, and when the pipe blank abuts against the top of the forming cavity, forming of a sealed pipe body is completed. According to the compression pipe forming method, the pipe blank can be smoother and more natural in the deformation process, and the shape precision is high.

Description

technical field [0001] The invention relates to a process method, in particular to a pressing tube forming method. Background technique [0002] Internal high pressure forming is an advanced manufacturing technology for manufacturing hollow integral components. Its principle is to use the pipe as a blank, use water and other liquids as a transmission medium, and flush high-pressure water into the interior of the pipe to generate pressure on the inner wall of the pipe. The two ends of the pipe are sealed with a punch, and the axial feed is used to provide supplementary material for the pipe forming, so that the outer wall of the pipe is completely attached to the mold cavity, so as to obtain the desired shape of the part. The forming of the compression tube is mainly realized by internal high-pressure molding. The compression tube includes a sealing tube body arranged at the end. The sealing tube body is a radially outward protrusion. The cavity of the mold includes a The an...

Claims

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Application Information

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IPC IPC(8): B21D26/033B21D26/047B21D51/00
CPCB21D26/033B21D26/047B21D51/00
Inventor 罗荣斌胡红侯杰
Owner 佛山市永恒液压机械有限公司
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