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A forward spinning method

A technology of spinning equipment and spinning wheel, which is applied in the field of forward spinning, can solve the problems such as difficult spinning of ultra-long thin-walled cylindrical parts, and achieve the effect of small processing amount, high precision and improved use precision

Active Publication Date: 2017-05-17
海鹰空天材料研究院(苏州)有限责任公司
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Problems solved by technology

[0005] In short, the functional limitations and technological methods of the existing spinning equipment are difficult to spin ultra-long thin-walled cylindrical parts (greater than 5 meters), which cannot meet the requirements of low-cost, high-efficiency, high-precision, and high-quality in the defense industry and other civilian industries. product requirement

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Embodiment Construction

[0054] The present invention will be described in detail below in conjunction with the accompanying drawings and specific examples.

[0055] Processing ultra-long thin-walled cylindrical parts, the wall thickness is 5mm, the manufacturing length L is 8000mm, the product outer diameter φD is 504mm, and the material is 0Cr18Ni9 stainless steel alloy.

[0056] The preparation process is as Figure 6 shown in the following steps:

[0057] 1. Prepare spinning blank

[0058] (1) Rough design

[0059] Design the spinning blank as Figure 7 , 8 The straight cylindrical structure shown has a wall thickness t 1 Calculate the wall thickness t of the spinning blank according to the spinning force of the spinning equipment, the wall thickness requirements of the spinning product, the limit thinning rate of the spinning material, the design of the spinning pass, etc. 1 , blank length L 1 According to the calculation method of equal volume and considering the reserved process allowanc...

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Abstract

The invention provides a forward-spinning spinning method. The outside spinning technology is combined with synchronous rotation, a short core mold, tension spinning and other technologies to achieve integral spinning forming of super-long thin-wall cylindrical parts, and therefore the technical problem that the common outside spinning technological method cannot be used for spinning the super-long thin-wall cylindrical parts is solved. According to the forward-spinning spinning method, the function of synchronous rotation of the two ends of workpieces is increased, the problem of torsional deformation of the super-long thin-wall cylindrical parts is solved, and therefore the precision of products is improved; the short core mold is adopted, so that the problems that core molds of the super-long thin-wall cylindrical parts lower heads and vibrate, the manufacturing cost is high, and demolding is difficult are solved. According to the forward-spinning spinning method, longitudinal drawing tension movement of the workpieces is increased, so that the super-long cylindrical parts are subjected to longitudinal force in the spinning process, the deforming and flowing of materials are facilitated, the problem that the ultra-long cylindrical parts bend and deform is solved, the product precision is improved, and integral spinning forming of the ultra-long thin-wall cylindrical parts is achieved.

Description

technical field [0001] The invention relates to a forward spinning method, which belongs to the technical field of pressure processing of metal pipes. Background technique [0002] Three-wheel powerful external spinning is currently the most important forming method for thin-walled cylindrical parts. It has the characteristics of large spinning tonnage, automatic centering of three-wheels, and high precision of spinning products. It is widely used in thin-walled cylindrical parts. , Spinning forming of parts with outer circumferential ribs and small cone angles. Due to the characteristics of the structure and function of the wheel mechanism, when spinning ultra-long (more than 10 meters in length) thin-walled cylindrical parts, the mandrel must have sufficient strength, rigidity and surface quality, and it is difficult to manufacture mandrels of more than 10 meters. During the spinning process, it is difficult to demould the ultra-long thin-walled cylindrical parts and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/14
CPCB21D22/14
Inventor 马世成王东坡吾志岗张晨
Owner 海鹰空天材料研究院(苏州)有限责任公司
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