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Method for processing thin wall metal elbow

A processing method and elbow technology, which are applied in the processing field of thin-walled stainless steel elbows, can solve the problems of inability to process elbows, elbows with large volume and large bending radius, and achieve the effect of saving materials, small volume and beautiful appearance.

Inactive Publication Date: 2007-12-12
洪信章
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: 1. The bending radius of the processed elbow is relatively large, the volume of the elbow is large, and there are many consumables; 2. It is impossible to process the elbow connecting pipes with unequal diameters.

Method used

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  • Method for processing thin wall metal elbow
  • Method for processing thin wall metal elbow

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0028] Referring to the attached drawings, processing an equal-diameter elbow with both ends of the inner hole diameter of 51mm includes the following steps:

[0029] (1) Blanking: Use a punch to punch out a disc 1 with a diameter D of 120mm on a 1.0mm stainless steel plate;

[0030] (2) One stretch: stretch the disc 1 into a cylinder 2 with one end open and one end closed on a hydraulic stretching machine. The inner diameter d1 of the cylinder 2 is 70mm, and the height h1 is 35mm;

[0031] (3) Secondary stretch: stretch the cylinder 2 processed in step (2) again on a hydraulic stretcher until the inner diameter d2 of the cylinder 2 is 51mm, and the height h2 is 59mm;

[0032] (4) Flat head: flatten the open end 11 of the cylinder 2 with a lathe;

[0033] (5) Tempering: Heat the workpiece processed in the above steps to 1000-1150°C, keep it for 20 minutes, and wa...

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Abstract

The thin wall stainless bender machining features in the blanking, stretch, flattening, annealing, bulge, boring, hole reversing, dual flattening, trimming and so on. It can machine stainless steel bender with wall thickness of 0.8-2.0mm, saving in material, free from stress accumulation, without welding seam and leakage, small in size, material economical, being able to machine the thin wall stainless steel bender for the connection with the equal radius and abnormal tube path.

Description

Technical field [0001] The invention relates to a processing method of metal pipe fittings, in particular to a processing method of a thin-walled stainless steel elbow. Background technique [0002] Elbow is a common part of pipe connection. The prior art stainless steel elbows are generally formed by die-casting. Such elbows have a thicker wall, generally exceeding 4 mm, a large number of consumables, high processing costs, stress concentration, easy water leakage, and a high rejection rate. ; There are also thin-walled stainless steel elbows processed by welding. Because the elbow joints are connected by curved surfaces, welding is difficult and costly. The weld is prone to water and air leakage, and the weld makes the appearance of the elbow unsightly. The Chinese invention patent application "Thin-walled stainless steel elbow and its processing method and special equipment" with publication number CN1891369 discloses a processing method of thin-walled stainless steel elbow. T...

Claims

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Application Information

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IPC IPC(8): B23P15/00B23P13/00B21D22/10B21D19/00B21D22/20
Inventor 洪信章
Owner 洪信章
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