A kind of anti-spinning method
A spinning equipment and spinning wheel technology, applied in the field of reverse spinning, can solve problems such as difficulty in spinning ultra-long thin-walled cylindrical parts, achieve the effects of small processing volume, solve manufacturing problems, and improve use accuracy
Active Publication Date: 2017-03-29
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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[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 Image 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 allowance...
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Abstract
The invention provides an anti-spin spinning method. An outside spinning technology is used, combining with synchronous rotation, short mandrel, and spinning with tension and other technologies, integrated spinning forming of extra-long thin-walled tubular parts is realized, and a technical problem that the extra-long thin-walled tubular part is difficult to make by using an ordinary outside spinning technology is solved. Through adding a function of synchronous rotation on two ends of a workpiece, a problem of torsional deformation of the extra-long thin-walled tubular part is solved, and product precision is improved. Through using a short mandrel, problems of mandrel lowering head, vibration, high manufacturing cost, and difficult demolding of the extra-long thin-walled tubular part are solved. Through adding longitudinal drawing tension movement of the workpiece, the extra-long tubular part bears longitudinal forces in a spinning process, being beneficial for deformation flow of materials. Problems of bending and deforming of the extra-long tubular part are solved, the method improves precision of products, and realizes integrated spinning forming of the extra-long thin-walled tubular parts.
Description
technical field [0001] The invention relates to a reverse 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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IPC IPC(8): B21D22/16
CPCB21D22/16
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