Bending forming method of railway van coupler yoke forge piece

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 ...

AI Technical Summary

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

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