Spinning forming method of stainless steel seamless pipe with flange at end
A spinning forming, stainless steel technology, applied in the direction of forming tools, metal processing equipment, manufacturing tools, etc., can solve the problems of inability to efficiently manufacture thick conveying pipes, limit structural design optimization margins, etc., and achieve improved structural design optimization margins , Facilitate model weight reduction, high reliability forming effect
Active Publication Date: 2018-12-21
CAPITAL AEROSPACE MACHINERY +1
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Problems solved by technology
The roll welding forming process can manufacture conveying pipes with equal wall thickness, but it cannot efficiently manufacture conveying pipes with different thicknesses, which limits the optimization margin of structural design
Method used
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Embodiment
[0033] Take the processing of stainless steel seamless steel pipe with a wall thickness of 1.5-1.8mm as an example:
[0034] (1) Manufacture the mold, in which there are 6 key grooves evenly distributed on the boss at the end of the mandrel, and the working radius of the rotary wheel is 8mm.
[0035] (2) Process the stainless steel cylindrical blank, the tail of the blank is processed with a 2-4mm inner convex step, and 6 through grooves are processed on the inner convex step, and the 6 through grooves correspond to the positions of the 6 key grooves on the mold. The thickness of the stainless steel cylindrical blank is selected to be 6mm, and the inner diameter deviation of the stainless steel cylindrical blank is controlled to be 0.03-0.08mm.
[0036] (3) Place a key block in each through-slot and its corresponding key groove, and fix the key block and core mold with screws. Push the tail top against the mandrel tightly.
[0037] (4) Control the rotation of the main shaft ...
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Abstract
The invention relates to a spinning forming method of a stainless steel seamless pipe with a flange at an end. The method comprises the following steps of: firstly, manufacturing a mold comprising a core mold, rotating wheels and a tail top; designing a boss on the end portion of the core mold; uniformly distributing a plurality of keyways on the boss; mounting four uniformly distributed rotating wheels on a spinning device, wherein opposite two rotating wheels are located on a same plane, and two adjacent rotating wheels are distributed alternately along axial and radial directions; then processing a stainless steel cylindrical blank, processing an inner convex step on the tail portion of the blank, and processing through slots in the inner convex step, wherein the inner convex step is matched with the boss on the end portion of the core mold, and the through slots correspond to the keyways in the mold one by one; placing a key block in each through slot and the corresponding keyway, fixing the key block and the core mold, and leaning against the core mold with the tail top; and controlling a main shaft to rotate by means of the spinning device and controlling the rotating wheels to extrude the blank to realize seamless spinning and forming of the stainless steel seamless pipe. The method provided by the invention increases the forming quality, precision and reliability, can manufacture stainless steel straight pipes which are different in wall thickness, and improves the optimizing margin of a structural design.
Description
technical field [0001] The invention relates to a spinning forming method of a stainless steel seamless tube with a flange at the end, which is a plastic processing technology and belongs to the field of rocket seamless tube forming. Background technique [0002] With the development of aerospace technology, the reliability requirements for aerospace manufacturing are getting higher and higher, which also promotes the application of various new integral forming technologies. Sheet metal integral spinning forming technology occupies a very important position in the aerospace industry. The stainless steel pipe with a flange at the end is an important part of the pipeline of the rocket storage tank, and it is the delivery channel for the propellant used in the rocket power. The traditional method realizes the forming of the stainless steel straight pipe through the stainless steel roll welding process, and the forming quality is not high. There are longitudinal welds in the met...
Claims
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IPC IPC(8): B21D22/16B21D37/10
CPCB21D22/16B21D37/10
Inventor 李杰杨国平祝世强孙秀京英升琪周磊王志强闻建龙刘云峰文帅
Owner CAPITAL AEROSPACE MACHINERY