Toroidal flow shaping method of antisymmetric reducing thin wall part

A thin-walled parts, evenly distributed technology, applied in the field of asymmetric variable-diameter thin-walled parts forming, can solve the problems of inability to realize asymmetrical variable-diameter thin-walled parts forming, inability to adjust the unevenness of blanks, etc. The effect of good surface quality and simple process

Active Publication Date: 2011-02-02
HARBIN INST OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of using the volute-shaped thin plate hydraulic stretching integral forming die. Due to the principle of uniform force on the hydraulic surface, it is impossible to adjust the non-uniformity of the deformation of the blank itself, so it is impossible to achieve non-uniformity of wall thickness distribution. Forming Problems of Thin-walled Parts with Symmetrical Variable Diameter

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  • Toroidal flow shaping method of antisymmetric reducing thin wall part
  • Toroidal flow shaping method of antisymmetric reducing thin wall part
  • Toroidal flow shaping method of antisymmetric reducing thin wall part

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specific Embodiment approach 1

[0013] Specific implementation mode one: combine Figure 1 to Figure 12 Describe this embodiment, the thin-walled parts circular flow forming method with uniform distribution of asymmetrical variable diameter in this embodiment is realized in this way: using viscoelastic plastic soft mold forming method, step 1, according to the asymmetrical variable diameter The structural characteristics of the thin-walled parts 9, the structural design of the core mold 3 in the forming mold 10: at a height of H 3 1. A plurality of loading injection holes 3-1 are processed on the side wall of the mandrel 3 in the region where the included angle in the horizontal section is α, and the diameter D of each loading injection hole 3-1 is 8 mm to 15 mm. Height H 3 and the included angle α are:

[0014] h 3 =H 1 -(8~12)mm(1)

[0015] Among them: H 1 is the forming height of the asymmetric variable-diameter thin-walled part 9, mm;

[0016] α=θ-(8°~12°)(2)

[0017] Where: θ is the horizontal i...

specific Embodiment approach 2

[0019] Embodiment 2: The slab blank in step 2 of this embodiment is stainless steel, titanium alloy, nickel-based superalloy or iron-based superalloy. The asymmetric variable-diameter thin-walled parts made of the above-mentioned materials can fully meet the needs of the fields of automobiles, aviation and spaceflight. Other method steps are the same as those in the first embodiment.

specific Embodiment approach 3

[0020] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the grade of the stainless steel in this embodiment is 1Cr18Ni9Ti or 0Cr18Ni9Ti. The asymmetric variable-diameter thin-walled parts made of the above-mentioned materials can fully meet the needs of the fields of automobiles, aviation and spaceflight.

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Abstract

The invention discloses an annular flow forming method for asymmetrical variable diameter thin-walled parts, and relates to a forming method for the asymmetrical variable diameter thin-walled parts. Based on solving the problems of complex process, low size precision, high cost and the like when the asymmetrical variable diameter thin-walled parts adopt the prior split forming and combined welding method, the method comprises: carrying out structural design on a core die, and manufacturing an unsealed cylinder blank; placing the unsealed cylinder blank between the core die and a split outer die of a forming die, and aligning one unsealed side opposite to one reverse side of a die cavity of the split outer die; and pushing a plunger piston to inject a viscoelastic soft die into a cavity ofthe core die, and deforming the unsealed cylinder blank by the action of loading injection holes until the side wall of the unsealed cylinder blank is attached to the inner wall of the die cavity of the split outer die. The method forms the asymmetrical variable diameter thin-walled parts having the advantages of good surface quality, high size precision, even distribution of thickness, simple process, low manufacturing cost and the like, can form the asymmetrical variable diameter thin-walled parts with complex shapes, and is suitable for the fields of automobiles, aviation, astronavigation,and the like.

Description

technical field [0001] The invention relates to a method for forming an asymmetric variable-diameter thin-walled part, which belongs to the technical field of plate forming. Background technique [0002] Asymmetric variable-diameter thin-walled parts are a typical type of shell structural parts in the fields of automobiles, aviation and aerospace. The strength of the material is higher or lower. For the forming and manufacturing of such parts, the manufacturing methods of split forming and combined welding are generally used at present. Split forming mostly uses stamping, spinning (even hot spinning), polyurethane rubber and other means. Due to the structural characteristics, the number of separate parts is large, the process is numerous, the cost is high, the dimensional accuracy is affected by each separate forming process, and the quality control is difficult. Due to the thin wall thickness and irregular shape of each split forming part; the combined welding process th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/10
Inventor 王忠金刘建光李毅吴维标
Owner HARBIN INST OF TECH
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