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Warm-hot forming method of seamless tunnel pipe with large radius-thickness ratio

A large diameter-to-thickness ratio, warm forming technology, applied in the direction of forming tools, metal processing equipment, manufacturing tools, etc., can solve the problems that the diameter-to-thickness ratio cannot be directly formed, the diameter ratio is limited, and the tunnel tube is too large to achieve shortening The production cycle and tooling are simple and easy, and the effect of eliminating longitudinal welds

Active Publication Date: 2017-04-19
CAPITAL AEROSPACE MACHINERY +1
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  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to provide a warm forming method for seamless tunnel tubes with large diameter-thickness ratio, realize the forming of seamless tunnel tubes with large diameter-thickness ratio, and effectively solve the current limitation of the diameter ratio of seamless tunnel tubes formed under high pressure and normal temperature Due to the original tube blank, it is impossible to directly form a tunnel tube with a large diameter-to-thickness ratio

Method used

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  • Warm-hot forming method of seamless tunnel pipe with large radius-thickness ratio
  • Warm-hot forming method of seamless tunnel pipe with large radius-thickness ratio
  • Warm-hot forming method of seamless tunnel pipe with large radius-thickness ratio

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] A method for thermoforming a seamless tunnel pipe with a large diameter-to-thickness ratio, comprising the following steps:

[0034] S1: Select the original pipe material, conduct mechanical performance test, wall thickness inspection, and meet the national standard of the corresponding material, intercept a part of the seamless pipe blank 1 from the selected original pipe material, clean it, and remove surface oil and impurities;

[0035] S2: heating the upper mold half A2 and the lower mold half A7 through the heating coil 3, and the upper mold half A2 and the lower mold half A7 can form a cavity A10;

[0036] S3: The first corrugation of the tube blank 1 is formed; open the upper half mold A2 and the lower half mold A7, place the tube blank 1, close the upper half mold A2, the lower half mold A7, place the left head 4 and th...

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Abstract

A warm-hot forming method of a seamless tunnel pipe with the large radius-thickness ratio comprises the following steps that S1, an original pipe is selected; S2, a heating coil is used for heating; S3, a first corrugation is formed through a pipe blank 1; S4, the pressure of a flexible medium in the pipe blank is relieved, and an upper half mold and a lower half mold are opened; S5, a second corrugation is formed through the pipe blank 1; and S6, a third corrugation continues to be formed in a cavity B, the method of the third corrugation is consistent with the forming method of the first corrugation and the forming method of the second corrugation, and an Nth corrugation is formed in the same way till all corrugations are formed.

Description

technical field [0001] The technology belongs to the field of forming methods, and in particular relates to a warm forming method for a seamless tunnel pipe with a large diameter-thickness ratio. Background technique [0002] In the field of aerospace manufacturing, the tunnel tube is one of the important parts. The traditional tunnel pipe forming process is: plate beading - rolling arc (roller) - cylinder tailor welding (longitudinal seam) - long cylinder splicing (circular seam). There are many processes, the workload of welding and trimming is too large, the product stability and consistency are poor, and the product quality is difficult to guarantee. It is urgent to adopt advanced forming technology to meet design and production needs. [0003] Internal high pressure forming refers to the forming method of deforming the tube blank to fit the cavity of the mold through the internal force transmission medium (usually liquid or gas) pressurization and axial force feeding....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D15/06B21D15/10B21D37/10B21D37/16
CPCB21D15/06B21D15/10B21D37/10B21D37/16
Inventor 杨微祝世强孙秀京张旭王永铭贾春莉王大刚张文忠晋坤高林
Owner CAPITAL AEROSPACE MACHINERY
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