Accurate continuous bending method of U-shaped large forging

A technology for large forgings and forgings, applied in the field of precise continuous bending, can solve the problems of sudden change in forming load, poor symmetry of forgings, excessive scratches in the contact area between forgings and dies, etc., to reduce the bending load, improve the symmetry of forgings, and improve the processing process. smooth smooth effect

Inactive Publication Date: 2017-06-13
SOUTHWEST UNIVERSITY
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  • Abstract
  • Description
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a U-shaped large forging bending processing method that can be implemented on general-purpose forging equipment to overcome the sudden change in forming load, excessive abrasion of the contact area between the forging and the die and the forging in the prior art. poor symmetry problem

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  • Accurate continuous bending method of U-shaped large forging
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  • Accurate continuous bending method of U-shaped large forging

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Embodiment Construction

[0026] In order to illustrate the technical process of the present invention more clearly, the forging of the coupler frame of a railway freight car is used as an example forging below, and the present invention is further described in detail in conjunction with the accompanying drawings. What needs to be specially explained here is that the coupler frame is an important part for a railway freight car, and is a typical U-shaped frame structure, which is particularly suitable for the implementation of the present invention.

[0027] When this method is implemented, the figure 1 , figure 2 The structural device shown in the figure realizes the bending and forming of the railway wagon coupler frame forging 1, and its structure includes an arc-shaped entrance die 7, and a matching punch 21 and a back pressure die 26 with a bending guide plate 2 are realized, wherein , the working surface 5 of the arc-shaped entrance die 7 in contact with the bending guide plate 2 is 1 / 4 of a com...

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Abstract

The invention discloses an accurate continuous bending method of a U-shaped large forging. The method is realized through an arc-shaped inlet female mold, a male mold matched with the female mold, and a back pressure mold with a bent guiding plate. The method comprises the following steps: heating a forging blank to perform preforging; performing back pressure trimming; performing residual heat accurate positioning; enabling the bent guiding plate to drive the bent part of the forging to move and be bent along the arc-shaped track of a female mold inlet, and the like. The method has the advantages that the surface of the bent part is high in quality and small in damage, and the symmetry of the forging is high.

Description

technical field [0001] The invention relates to a bending method of a large forging, in particular to an accurate continuous bending method capable of improving the dimensional accuracy and surface quality of a U-shaped large forging. Background technique [0002] The bending forming process is still a major problem restricting the bending production of high-quality large forgings. During the bending deformation process of U-shaped large forgings, it is very easy to cause sudden changes in load, severe thinning of the deformation zone, large scratches on the surface of the forging, and poor symmetry of the U-shaped bending arm. The overall quality of the forging is low, which is likely to cause safety hazards. The mainstream technology uses general-purpose equipment for bending pre-forming supplemented by cold / hot correction processes or purchases expensive special bending machines to avoid this technical problem, resulting in lengthy process routes and greatly increased pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D7/04B21D7/16B21D37/10B21D43/00
CPCB21D7/04B21D7/16B21D37/10B21D43/003
Inventor 李路潘志远郭棋李豪蒋威
Owner SOUTHWEST UNIVERSITY
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