Bending forming method of railway van coupler yoke forge piece

A railway freight car and bending forming technology is applied in the field of bending forming of forgings of yoke stern frame of railway freight cars, which can solve the problems of thinning of the bending root of forgings, poor quality of formed products, excessive height of frame arms, etc. Improve production efficiency and improve the effect of stress state

Inactive Publication Date: 2009-11-18
CHONGQING UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the existing railway wagon coupler frame forming technology, when solving its bending problem, a hydraulic bending special machine is often used to turn over the plate, which has the disadvantages of expensive equipment and high processing cost, and this technology uses hydraulic pressure as the power to turn the plate Forgings are forcibly bent, which often leads to local thinning at the bent root of the forging, and serious problems in the height of the frame arm, so it also has the defect of poor quality of formed products

Method used

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  • Bending forming method of railway van coupler yoke forge piece
  • Bending forming method of railway van coupler yoke forge piece
  • Bending forming method of railway van coupler yoke forge piece

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] When this method is actually implemented, through such as figure 1 The shown structural device realizes the bending forming of the forging of the coupler frame of a railway freight car, and its structure is as follows: it includes an inclined-plane die 1, and a matching punch 6 and back pressure die 4 are realized, wherein the inclined-plane die 1 is shown on the upper surface There is a groove cavity 7, and the end faces on both sides of the groove cavity 7 are slopes 8 that are low on the inside and high on the outside. The lowest point of the slope 8 is provided with a roller 2. The lower surface of the punch 6 has a The boss 3 matching the cavity 7, the shape of the lower end surface of the boss 3 matches the shape of the inner surface of the middle part of the coupler frame forging, the back pressure die 4 is set inside th...

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Abstract

The invention discloses a bending forming method of railway van coupler yoke forge pieces. The method is realized by an incline female die, and a male die which is matched with the female die and a back pressure die. The method comprises the steps of:preheating a forge piece rough part, carrying out primary bending by taking the highest point of the incline of the incline female die as a first supporting point, and carrying out secondary bending by taking the lowest point of the incline of the incline female die as a second supporting point. The method has the advantages of low cost and good processing quality.

Description

technical field [0001] The invention relates to a bending forming method of a large forging, especially a forging of a coupler frame of a railway wagon. Background technique [0002] The bending forming process of large forgings has always been a major problem restricting the production capacity and level of the forging industry. Due to the special structure and performance indicators of large and medium-sized forgings, it is often difficult to achieve precise bending and forming with ordinary forging equipment and tooling. If the design of the bending tool is unreasonable, there may even be serious local thinning or even cracking quality problems at the bending root of the forging that requires very high performance indicators, resulting in product scrapping. Most of the industry adopts rough bending preforming supplemented by subsequent correction process or purchases expensive special bending machine to avoid this technical problem, which virtually increases the product ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D11/10B21D11/22B21D37/10B21D37/12B21D7/06B21D7/16
Inventor 周杰李路徐戊矫阳德森权国政卢先正
Owner CHONGQING UNIV
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