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Red copper threading pipe connector producing method

A production method and technology for red copper pipes, which are applied in the extrusion forming process and the field of red copper threaded pipe fittings, can solve the problems of large production sites of lead and brass, high material loss, multiple supporting equipment, etc., and reduce the area of ​​production sites. , Improve the quality and improve the effect of material purity

Inactive Publication Date: 2003-11-19
李康宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The content of lead, zinc, iron, mercury, nickel, manganese, etc. in lead brass raw materials is relatively high, and the product is subject to hygienic license restrictions when used in the food industry, pharmaceutical industry, drinking water and other fields;
[0004] 2. Because lead brass contains more other metal components, the product is brittle and easily broken during use;
[0005] 3. Lead brass pipe fittings have high energy consumption during processing and are accompanied by air pollution;
[0006] 4. Lead brass requires a larger production site and more supporting equipment in the production process;
[0007] 5. Due to the use of casting, sand cleaning, and heating forging, the material loss of existing products is relatively high during gold processing
[0008] At present, there is no precedent for manufacturing copper threaded pipe fittings by extrusion molding in my country.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Select a copper pipe with a content of 99% and a wall thickness of 2 mm, and cut it according to the size of the required product of 6 cm. Fill the hollow part of the cut billet with paraffin wax, and heat it into a liquid state before use. Then pour it into the copper tube blank to be processed. Then put the billet filled with the filler into the prepared mold, then put the mold with the billet on the press, extrude the billet under the action of the external force of the extruder, and take out the semi-finished copper pipe fittings that are extruded , remove the filling in the semi-finished product, and finally use a lathe to process the semi-finished product according to the required size for gold processing and thread cutting, and then it will be a complete product of the copper threaded pipe joint.

Embodiment 2

[0019] Select a copper pipe with a content of 99.5% and a wall thickness of 4 mm, and cut it according to the size of the required product of 20 cm. Fill the hollow part of the cut billet with filler zinc, and heat the zinc before use. Liquid state, then poured into the copper tube blank to be processed, then put the blank filled with filler into the prepared mold, and then put the mold with the blank on the press, under the action of external force on the extruder Next, the billet is extruded, and the semi-finished copper pipe fittings that are extruded are taken out, the fillers in the semi-finished product are removed, and finally the semi-finished product is processed and threaded by a lathe according to the required size, and then the copper threaded pipe joint is formed. complete product.

Embodiment 3

[0021] Select the red copper pipe with a content of 99.9% and a wall thickness of 1.6 mm, and cut it according to the size of the required product 10 cm, fill the hollow part of the cut billet with filler lead, and heat it into a liquid state before use , and then poured into the copper tube blank to be processed. Then put the billet filled with the filler into the prepared mold, then put the mold with the billet on the press, extrude the billet under the action of the external force of the extruder, and take out the semi-finished copper pipe fittings that are extruded , remove the filling in the semi-finished product, and finally use a lathe to process the semi-finished product according to the required size for gold processing and thread cutting, and then it will be a complete product of the copper threaded pipe joint.

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Abstract

A technology for manufacturing screwed red copper tube as jointer includes such steps as choosing high-purity (99%) thick-wall red copper tube, cutting short by 5-30 cm, cold die pressing to obtain semi-finished products, and machining. Its advantages are high quality and productivity, and low energy consumption and environmental pollution.

Description

Technical field: [0001] The invention belongs to the technical field of processing and manufacturing pipe joints, in particular to a production method that can replace the original copper threaded pipe joints made of leaded brass, and especially relates to extrusion in the production method of pipe joints. Compression molding process. Background technique: [0002] The processing technology of the lead brass pipe fittings in the prior art is as follows: the raw material of the pipe fittings is lead brass. The process steps are casting, sand cleaning, heating forging and forming, blank blasting, cleaning the oxide layer on the surface of the blank, and finally gold processing and threading to become a finished product. The pipe joints processed by this type of process currently have the following problems: [0003] 1. The content of lead, zinc, iron, mercury, nickel, manganese, etc. in lead brass raw materials is relatively high, and the product is subject to hygienic licens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/20
Inventor 李康宁
Owner 李康宁
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