Forming and correcting manufacturing method for aluminum alloy vehicle head skin of urban railway vehicle

A manufacturing method and technology of aluminum alloy, applied in railway transportation, railway transportation, climate sustainability, etc., can solve the problems of wrinkles and cracks, difficulty in forming and correction, and inability to meet production needs, so as to reduce the scrap rate and improve the design. The effect of line accuracy and shortening of auxiliary time for scribing

Active Publication Date: 2021-01-08
CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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Problems solved by technology

[0007] In order to solve the problems that the existing front skin forming method adopts mold calendering, which is difficult to form and correct, and is prone to wrinkles and cracks, resulting in the inability to meet production requirements, it provides an aluminum alloy front skin forming method for urban railway vehicles. Corrective Manufacturing Method

Method used

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  • Forming and correcting manufacturing method for aluminum alloy vehicle head skin of urban railway vehicle
  • Forming and correcting manufacturing method for aluminum alloy vehicle head skin of urban railway vehicle
  • Forming and correcting manufacturing method for aluminum alloy vehicle head skin of urban railway vehicle

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specific Embodiment approach 2

[0026] Specific embodiment two, combine Figure 1 to Figure 6 Describe the implementation mode. This implementation mode is an example of the manufacturing method for forming and correcting the aluminum alloy headboard skin of the city railway vehicle described in the first specific embodiment mode: the method is realized by the following steps:

[0027] The first step: draw

[0028] After calendering, there is a machining allowance on the periphery of the skin. At this time, the skin is larger than the trimmed membrane. The skin is buckled on the trimmed membrane, and the first line is drawn. The skin is in the original shape of the trimmed membrane. There is a machining allowance of 30mm on the line. After using manual plasma to cut off excess auxiliary materials, the skin will spring back and deform.

[0029] Step two: choose

[0030] According to the difference in deformation of each cut edge structure of the skin, select a suitable vibrating hammer forming mold to dete...

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Abstract

The invention discloses a forming and correcting manufacturing method for an aluminum alloy vehicle head skin of an urban railway vehicle, relates to the technical field of vehicle head skin forming in railway vehicles, and solves the problems that an existing vehicle head skin forming method adopts die calendering forming, is difficult in forming and correcting, easily generates wrinkles, cracksand the like, and cannot meet the production requirements. The method comprises the following steps of step 1, increasing blank holder force during calendering to obtain a calendered skin; step 2, conducting primary cutting and secondary accurate cutting on the auxiliary materials at the periphery of the skin calendered in the step 1 by adopting a manual plasma technology in order to obtain a skinmeeting the requirements; and step 3, rebounding, shaping and repairing the vehicle head skin, putting the skin which meets the requirements and is obtained in the step 2 on an adjusting and repairing tire membrane to be manually adjusted and repaired, and obtaining the formed and corrected vehicle head skin. According to the manufacturing method, the one-time forming quality of the vehicle headskin is improved, the rejection rate is reduced, the machining efficiency is improved, and the vehicle head skin forming quality is guaranteed.

Description

technical field [0001] The invention relates to the technical field of forming the front skin of a rail vehicle, in particular to a manufacturing method for forming and correcting the aluminum alloy front skin of an urban railway car. Background technique [0002] ⑴The existing front skin adopts a new design structure. The front skin is formed by die calendering and vibrating hammer correction. It is difficult to correct the unstable forming. [0003] ⑵The mold has been repaired and changed many times, but there are still defects such as wrinkles and cracks, which still cannot meet the technical requirements of the process drawings. [0004] (3) Vibrating hammer correction forming, supplemented by manual adjustment, forming and correction is labor-intensive, and the accuracy of skin forming and scribing cannot meet the production needs, which causes great difficulties for the welding of the aluminum body and front skin, and affects the overall effect of the front . [0005...

Claims

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Application Information

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IPC IPC(8): B21D1/12
CPCB21D1/12Y02T30/00
Inventor 王震赵艳华徐达张学广
Owner CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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