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Hydraulic bulging forming method for colored metal three-way joint

A non-ferrous metal and tee technology, applied in the field of non-ferrous metal tee forming, can solve the problems that are difficult to meet the requirements of "finish, clean and economical", the forming accuracy of tee pipe fittings is not high, and the product is unevenly stressed, so as to eliminate Residual stress and work hardening problems, low labor intensity of workers, and the effect of overcoming internal dislocation growth

Active Publication Date: 2014-04-02
XIAN UNITED PRESSURE VESSEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Often the obtained tee pipe fittings have low forming precision, thick oxide skin on the surface, more machining allowance is required for the thickness of the blank, serious waste of raw materials, high production costs, complicated procedures, high labor intensity, low efficiency, and low length of branch pipes , the product is subjected to extremely uneven stress, which seriously affects the use of the product in harsh environments, and it is difficult to meet the requirements of modern production for "fine, clean and economical"

Method used

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  • Hydraulic bulging forming method for colored metal three-way joint
  • Hydraulic bulging forming method for colored metal three-way joint
  • Hydraulic bulging forming method for colored metal three-way joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Manufacture of C-276 nickel-based alloy tee with Ф48.3×2.77mm and branch pipe height of 58.15mm:

[0040] Step 1. Carry out surface eddy current testing on the C-276 nickel-based alloy tube billet according to JB / T4730.6-2005, select a tube billet without defects such as cracks and inclusions, and conduct ultrasonic testing according to JB / T4730.3-2005, and select Tube blanks without internal defects such as delamination; according to the principle of constant metal volume, sawing and cutting straight tube blanks, deburring, cleaning and removing impurities and oil stains attached to the inner and outer surfaces of the tube blanks, and then smearing on the outer surface of the tube blanks Lubricant S-0 forged graphite emulsion;

[0041] Step 2. Select a mold according to the size of the tee that needs to be formed, place the tube blank coated with lubricant in step 1 in the mold cavity, and set a layer of plastic film between the outer wall of the tube blank and the inn...

Embodiment 2

[0053] Manufacturing of R60702 pure zirconium tee with Ф60.3×3.91mm and branch pipe height of 64.15mm:

[0054] Step 1. Conduct surface eddy current testing on the R60702 pure zirconium tube billet according to JB / T4730.6-2005, select the tube billet without cracks, inclusions and other defects, and conduct ultrasonic testing according to JB / T4730.3-2005, select no delamination Tube blanks with internal defects; according to the principle of constant metal volume, sawing and cutting straight tube blanks, deburring, cleaning and removing impurities and oil stains attached to the inner and outer surfaces of the tube blanks, and then applying lubricant S to the outer surface of the tube blanks -0 forged graphite milk;

[0055] Step 2. Select a mold according to the size of the tee that needs to be formed, place the tube blank coated with lubricant in step 1 in the mold cavity, and set a layer of plastic film between the outer wall of the tube blank and the inner wall of the mold;...

Embodiment 3

[0067] Ф33.4×1.65mm, the manufacture of TA2 pure titanium tee with a branch pipe height of 38.7mm:

[0068] Step 1. Conduct surface eddy current testing on TA2 pure titanium tube blanks according to JB / T4730.6-2005, select tube blanks without defects such as cracks and inclusions, and conduct ultrasonic testing according to JB / T4730.3-2005, and select no delamination Tube blanks with internal defects; according to the principle of metal volume invariance, sawing and cutting straight tube blanks, deburring, cleaning and removing impurities and oil stains attached to the inner and outer surfaces of the tube blanks, and then applying lubricant two to the outer surface of the tube blanks Molybdenum sulfide;

[0069] Step 2. Select a mold according to the size of the tee that needs to be formed, place the tube blank coated with lubricant in step 1 in the mold cavity, and set a layer of plastic film between the outer wall of the tube blank and the inner wall of the mold;

[0070] S...

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Abstract

The invention discloses a hydraulic bulging forming method for a colored metal three-way joint. The method comprises the steps of 1, clearing and removing impurities and oil dirt attached to the inner surface and the outer surface of a colored metal pipe blank, and then smearing a lubricating agent on the outer surface of the colored metal pipe blank; 2, selecting a mold, and arranging the colored metal pipe blank with the lubricating agent into a mold cavity of the mold; 3, performing hydraulic bulging forming on the colored metal pipe blank arranged in the mold through a three-way hydraulic machine to obtain a semifinished three-way joint product; 4, performing thermal treatment on the semifinished three-way joint product; 5, repeatedly performing the step 2 and the step 3 on the semifinished three-way joint product subjected to the thermal treatment to obtain a formed piece; 6, performing stress removal thermal treatment on the formed piece; and 7, cutting off a branch pipe plug of the formed piece, then performing groove processing, and finally performing abrasive blasting to obtain a finished three-way joint product. According to the hydraulic bulging forming method disclosed by the invention, oxidization of the colored metal three-way joint in a manufacturing process is effectively prevented, the problems of residual stress and processing hardening in a forming process are alleviated or solved, and the yield of the product is obviously increased.

Description

technical field [0001] The invention belongs to the technical field of forming a nonferrous metal tee, and in particular relates to a hydraulic bulging forming method for a nonferrous metal tee. Background technique [0002] Tee pipe fittings are one of the indispensable components in pipelines. They are widely used in petrochemical, electric power, machinery, ships, marine and other fields, and the demand is increasing, especially the marine engineering equipment industry is regarded as a national key planning industry. Play a rapid role in promoting the application of non-ferrous metal tees. [0003] The cold forming process of tee pipe fittings is mainly used in stainless steel, carbon steel and other materials, and non-ferrous metals are rarely used. The traditional cold forming process of ferrous metal materials such as stainless steel is directly used, and the yield rate is only 45% to 60%. The cost is very high, which seriously limits the application of non-ferrous m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/037
Inventor 李宁叶建林董斌张成郗大来付维军孙万仓
Owner XIAN UNITED PRESSURE VESSEL CO LTD
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