A Reverse Spinning Processing Method for Small Taper Cylindrical Parts
A technology of reverse spinning and processing method, which is applied in the field of spinning manufacturing, can solve the problems of unused spinning and high processing cost, and achieve the goal of reducing the slippage of the blank, reducing the slipping phenomenon, and improving the apparent quality of the inner surface Effect
Active Publication Date: 2019-03-19
XIAN AEROSPACEMOTOR MACHINE FACTORY
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Problems solved by technology
[0009] In order to overcome the disadvantages of high processing cost in the prior art and the fact that spinning forming technology is not applicable to thin-walled small-taper cylindrical parts, the present invention proposes a reverse spinning processing method for small-taper cylindrical parts
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Embodiment 1
[0053] This embodiment is a thin-walled and small-taper cylindrical part processed from ultra-high-strength steel 31Si2MnCrMoVE. The semi-cone angle of the processed workpiece is 0.5°, the length is 2560 mm, the wall thickness is 2 mm, and the diameter of the small end is Φ300 mm.
[0054] The concrete process of this embodiment is:
[0055] The first step is to make the mold body:
[0056] The molded body 2 is the required mold for spinning. The molded body 2 is a hollow rotating body, which is divided into an installation section and a working section. The circumferential surface of the working section is a working surface; the working surface is a conical surface, and the half cone angle of the working surface is determined according to formula (1):
[0057]
[0058] In the formula: Ψ is the half-cone angle of the working surface of the mold body; is the half-cone angle of the small taper cylinder.
[0059] The installation section is located at the end of the large...
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Abstract
The invention provides a reverse spinning method for a small taper cylindrical part. According to the size and deformation force of a small taper thin-walled cylinder part to be processed, an appropriate spinning die is designed to ensure stable thinning elongation deformation in a reverse spinning process. The assembly and disassembly are convenient. The cylindrical part matches the existing spinning device, and the installation accuracy is high. In the spinning process, the working surface taper of the mold body matches the taper of the processed small taper thin-walled cylinder part, and the bore-hole of the installation end face matches the spindle of the spinning device. Through connection and fastening of a double-headed bolt, the overall stability of a tooling is ensured in the processing process to prevent sliding and bending. The shape position and the surface accuracy of a workpiece are improved. According to the invention, the short spinning die is used to produce the long thin-walled small taper cylindrical part; the cost of the spinning die is reduced; the utilization rate of the spinning device is improved; and the quality of the small taper spinning cylinder part is improved.
Description
technical field [0001] The invention relates to the spinning manufacturing industry, and in particular adopts a reverse spinning method to form a thin-walled cylindrical structural member with a half-cone angle less than 1°. Background technique [0002] With the rapid development of my country's aviation, aerospace technology and national economy, the demand for small-tapered thin-walled cylindrical parts is also increasing and becoming more and more urgent. For example, the parts of a small-tapered cylindrical part: [0003] The part material is ultra-high-strength steel 31Si2MnCrMoVE, with a closed cylindrical structure, a half taper angle of 0.5°, and a length greater than 2500mm. This small taper cylindrical part has processing problems such as large outline size, thin wall thickness, easy deformation, and high precision requirements. [0004] After investigation, three sets of schemes are mainly adopted for the processing of similar structural parts in the market: 1. R...
Claims
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IPC IPC(8): B21D22/16B21D37/10
CPCB21D22/16B21D37/10
Inventor 杨延涛曹学文赵琳瑜方拓张岩李楼罗卉胡新娟王鹏伟
Owner XIAN AEROSPACEMOTOR MACHINE FACTORY