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Homogeneous-tube pushing manufacturing method for pushed elbows

A manufacturing method and elbow technology, which are applied in the field of pushing and manufacturing the whole pipe of pushing elbows, can solve the problem that the ends of the elbows cannot be effectively controlled, the rear end of the push forming is uneven, and the wall thickness does not meet the requirements. and other problems, to achieve excellent technical effect, huge economic value and social value, and the effect of controlling the diameter and wall thickness of the end

Inactive Publication Date: 2012-01-11
SHENYANG RUIHONG PIPE FITTINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the inherent problems of the pushing process itself: the end of the pushing molding is always uneven, which requires a certain processing allowance
Secondly, when pushing large-diameter thin-walled elbows, the end of the elbow cannot be effectively controlled, so that the end diameter and wall thickness do not meet the standard requirements
At the same time, it also has the outstanding characteristics of material waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The invention discloses a whole pipe push manufacturing method of push elbow, which is carried out according to the following production process: whole pipe push—online cutting—heat treatment—bevel making—surface treatment.

[0013] The whole pipe push manufacturing method of the push elbow is based on the uncut whole pipe, and the elbow is directly pushed at the end of the pipe; and then the formed elbow section is cut.

[0014] In the whole pipe push manufacturing method of the push elbow, the method used to cut the formed elbow section from the whole pipe meets the following requirements: For elbows with specifications and sizes smaller than DN100, use flying saws to cut ; For elbows with specifications greater than or equal to DN100, plasma cutting is used.

Embodiment 2

[0016] The content of this embodiment is basically the same as that of Embodiment 1, and its difference mainly lies in:

[0017] The pushed elbow is specifically a DN50 90-degree short-radius elbow, and the required process blanking length is 150 mm by the method of the prior art. The process in this embodiment only requires a pipe length of 125 mm, saving materials 17%.

Embodiment 3

[0019] The content of this embodiment is basically the same as that of Embodiment 1, and its difference mainly lies in:

[0020] The pushed elbow is specifically a DN30 045-degree long-radius elbow. The length of the blanking process required by the method of the prior art is 580 mm. The process in this embodiment only requires a pipe length of 550 mm, and the material saved is 5.5%.

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Abstract

The invention relates to a homogeneous-tube pushing manufacturing method for pushed elbows. The invention is characterized in that: the homogeneous-tube pushing manufacturing method for pushed elbows has the specific requirements that: based on uncut homogeneous tubes, directly carrying out elbow pushing on tube ends; and then cutting the formed elbow sections. Compared with the prior art, the pushing method provided by the invention has the outstanding advantages that: over 5-20% of materials can be saved; and the caliber and the wall thickness at end parts can be effectively controlled, thereby facilitating forming. The pushed elbows manufactured by the method provided by the invention have an excellent technical effect; the physical and chemical properties, the dimensions and the structural shapes of the pushed elbows fully accord with the standards, such as the US standard ASMEB 16.9, the international standard GB / T 13401, the SH 3409 and the like; the pushed elbows have the advantages of high push-forming efficiency, stable performance, advanced technique and suitability for mass production. The method provided by the invention has foreseeable large economic and social values.

Description

technical field [0001] The invention relates to a manufacturing method of a push elbow, and in particular provides a push manufacturing method for a whole pipe of a push elbow. Background technique [0002] In the prior art, the production process of the push elbow is: cutting and blanking in sections - pushing - heat treatment - beveling - surface treatment. [0003] The "segment cutting and blanking" is to cut the steel pipe into a certain length of pipe ends, so as to push them into shape separately. Due to the inherent problem of the pushing process itself: the end of the pushing molding is always uneven, which requires a certain machining allowance. Secondly, when the large-diameter thin-walled elbow is manufactured, the end of the elbow cannot be effectively controlled, so that the diameter and wall thickness of the end do not meet the standard requirements. Simultaneously it also has the prominent feature of material waste. [0004] People are eager to obtain a met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
Inventor 徐睿星
Owner SHENYANG RUIHONG PIPE FITTINGS
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