Process equipment used for large-size bowl-shaped structural part preforming

A technology for process equipment and structural parts is applied in the field of process equipment for pre-forming large-sized bowl-shaped structural parts, which can solve problems such as edge wrinkling, reduce wall thickness difference, reduce spinning deformation, and increase anti-instability effect of ability

Inactive Publication Date: 2021-03-09
CAPITAL AEROSPACE MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a process equipment for preforming large-sized bowl-shaped struct

Method used

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  • Process equipment used for large-size bowl-shaped structural part preforming
  • Process equipment used for large-size bowl-shaped structural part preforming
  • Process equipment used for large-size bowl-shaped structural part preforming

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0035] In order to realize the pre-forming of large-sized bowl-shaped structural parts and ensure that the forming accuracy and quality meet the requirements, the present invention optimizes the parameters of the forming surface of the punch and specially designs the structural parameters of the forming tool. The specific implementation methods are as follows:

[0036] In order to ensure the stability of spinning and the forming accuracy of the final part, the design of the preformed surface is optimized through calculation and repeated demonstrations, and the characteristic parameters of the forming surface of the punch are obtained as follows: image 3 As shown; the process provides a circular plate with a blank size of 3200mm in diameter. During the forming process, the blank must all enter the forming area, and ensure the forming of a straight line section with a length of the outer cylindrical section ≥ 200mm and a partial ellipsoid at the bottom;

[0037] The bottom of th...

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PUM

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Abstract

The invention discloses process equipment used for large-size bowl-shaped structural part preforming, and belongs to the technical field of sheet metal forming process equipment. The process equipmentcomprises a hydraulic machine tool, and further comprises a convex die holder, a blank holder, a convex die, a concave die and a material returning device. An upper platform allowing the convex die holder to be fixedly mounted and a lower platform allowing the concave die to be fixedly mounted are arranged on the hydraulic machine tool. The material returning device is arranged in the concave die, the blank holder is arranged beside the convex die holder, an ejector rod for providing pressure for the blank holder is arranged at the top of the blank holder, and a material returning ejector plate used for ejecting a preformed structural part on the material returning device is arranged at the bottom of the material returning device. By means of drawing ribs arranged on the blank holder andthe concave die, flowing materials are delayed to fully release deformation stress, the forming gap between the concave die and the convex die is set to be several times of the thickness of the materials, and wrinkling and cracking of blanks in the forming process can be avoided.

Description

technical field [0001] The invention relates to the field of process equipment development, in particular to a process equipment for preforming large-sized bowl-shaped structural parts. Background technique [0002] Two-piece cans or two-piece cans refer to metal containers consisting of a can lid and an integral seamless can body with a bottom. The can body of this type of metal container is formed into a set shape by deep drawing. This forming method belongs to stamping and deep drawing processing, so two-piece cans are also often called deep drawing cans. They have large diameters and small bottom brackets, which are typical. Two-piece cans with different diameters, this kind of cans have beautiful appearance, high difference, and good identification. When the large-sized bowl-shaped structural parts are formed by spinning, in order to solve the problem of edge wrinkling that easily occurs during the blank spinning process , the sheet is preformed first. The preforming ...

Claims

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Application Information

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IPC IPC(8): B21D22/14B21D37/10B21D43/00B21D37/00
CPCB21D22/14B21D37/10B21D43/003B21D37/00
Inventor 赵熙春曲宏芬戴钦周世杰呼啸李杰李旭东吴劲松杨国平周磊黄晶刘苏
Owner CAPITAL AEROSPACE MACHINERY
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