Rigid mold-flexible mold composite forming device and method of reducing cylindrical part

A technology for composite forming and cylindrical parts, applied in the field of sheet metal forming, can solve the problems of inability to form rigid molds and low pressure forming efficiency of viscous medium, and achieve the effects of good repeatability of parts, improved forming limit and high efficiency

Active Publication Date: 2018-02-16
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the traditional rigid die cannot form large-size variable-diameter cylindrical parts, and the probl

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  • Rigid mold-flexible mold composite forming device and method of reducing cylindrical part
  • Rigid mold-flexible mold composite forming device and method of reducing cylindrical part
  • Rigid mold-flexible mold composite forming device and method of reducing cylindrical part

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0027] Such as image 3 As shown, a rigid mold-flexible mold composite forming device for a cylindrical part with reduced diameter includes a first plunger 1, a blank holder 2, a combined die 4 and a second plunger 5; the first plunger 1 has one end Close the open inner cavity at the other end, the closed end of the first plunger 1 is provided with a medium hole 11, the combined die 4 includes two half dies, the two half dies are combined to form a cavity with the same shape as the part to be formed 41. When in use, the blank holder 2 is located above the combined die 4, the blank holder 2 and the combined die 4 are set up and down, and the blank holder 2 and the combined die 4 are provided with a plate 3 to be formed. The closed end of the first plunger 1 extends into the combined concave c...

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Abstract

The invention provides a rigid mold-flexible mold composite forming device and method of a reducing cylindrical part, and belongs to the technical field of plate forming. The device comprises a firstplunger, a blank holder, a combined concave mold and a second plunger. A plate is pressed into a cavity of the combined concave mold through the first plunger, a viscous medium in an inner cavity of the first plunger is extruded out from medium holes thorough the second plunger, medium pressure acts on the to-be-formed plate so that the to-be-formed plate can deform, and the characteristics that the traditional plate rigid mold forming efficiency is high and the part repeatability is good are achieved; meanwhile, the characteristics that the viscous medium has viscidity adhesive force and strain rate sensibility during viscous medium pressure forming are achieved; the problem that parts with complex cavities cannot be obtained during rigid mold forming is solved; and meanwhile the problemsthat when large-size parts are formed, filling of the viscous medium is slow in the viscous medium pressure forming process, after part forming, a large number of viscous media adhere to the metal surfaces, and the removal time is long are solved.

Description

technical field [0001] The invention relates to the technical field of plate forming, in particular to a rigid die-flexible die compound forming device and method for a variable-diameter cylindrical part. Background technique [0002] Traditional plate forming uses rigid molds to form parts, which has the advantages of high production efficiency, good repeatability, and suitable for mass production. However, for some variable-diameter parts with complex cavity and complex structure, limited by the fixed rigid mold structure and shape, the required shape cannot be formed by rigid mold forming. The sheet metal flexible mold forming process uses liquid water or hydraulic oil, semi-solid viscous medium or solid polyurethane rubber as the forming punch or die, and the other half uses traditional rigid molds, which can not only reduce mold processing costs, but also because Fluidity, can fill complex cavity, and has great advantages in the forming of complex shape parts. Among t...

Claims

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Application Information

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IPC IPC(8): B21D26/021B21D26/031
CPCB21D26/021B21D26/031
Inventor 王朋义王忠全
Owner SHAANXI UNIV OF SCI & TECH
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