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Production method of copper pipe

A manufacturing method and technology for copper tubes, applied in manufacturing tools, heat treatment process control, heat treatment equipment, etc., can solve problems such as waste of manpower and material resources, easy deviation of center holes, unqualified products, etc., and save copper materials. , The effect of improving the pass rate and cost saving

Active Publication Date: 2010-12-08
江苏金圣铜业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Thick-wall microporous copper pipe is a new product with high efficiency and energy saving. For a long time, my country has not solved the technical problems of thick-wall microporous production technology. For this kind of products, one is to rely on imports from abroad and the price is expensive; the other is to adopt cumbersome procedures. Use the instrument lathe to drill holes on the copper rods and string them with the required steel wires before forging. After forging, take out the steel wires to achieve the purpose of punching copper rods. However, a fatal problem in this method is that the center hole is easy to deviate. Shifting, resulting in a large number of substandard products, so the problem of partial core has not been well resolved, resulting in waste of manpower, material resources and other resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Finished product specifications: outer diameter 6mm*wall thickness 2.5mm, center hole is 1mm

[0009] Conduct one to four air-drawings of copper tubes with state M, brand T2, outer diameter 38mm, wall thickness 5mm, and unlimited length until the outer diameter is 20mm and the inner hole diameter is 10±0.5mm, at 520°C Anneal at ±10°C for 3-5 hours, cool for 5-6 hours; then perform one to four air-drawings until the outer diameter is 15mm and the inner hole diameter is 6±0.5mm, and anneal at 520°C±10°C for 3-5 hours , cool for 5-6 hours; put the core liner in the center hole, and then empty-draw, replace the one-size-smaller core liner and then empty-draw, and cycle in turn until the copper tube is drawn into a state of Y, Thick-walled microporous copper tube with an outer diameter of 6mm and a central hole diameter of 1mm.

Embodiment 2

[0011] The finished product specifications are: outer diameter 7.8mm*wall thickness 3.175mm, center hole 0.5mm

[0012] Conduct one to four air-drawings of copper tubes with state M, brand T2, outer diameter 45mm, wall thickness 6mm, and unlimited length until the outer diameter is 22mm and the inner hole diameter is 10±0.5mm, at 520°C Anneal at ±10°C for 3-5 hours, cool for 5-6 hours; then perform one to four air-drawings until the outer diameter is 18mm and the inner hole diameter is 7±0.5mm, then anneal at 520°C±10°C for 3-5 hours , cool for 5-6 hours; put the core liner in the center hole, and then empty-draw, replace the one-size-smaller core liner and then empty-draw, and cycle in turn until the copper tube is drawn into a state of Y, The outer diameter is 7.8mm, the wall thickness is 3.175mm, and the center hole is 0.5mm thick wall microporous copper tube.

Embodiment 3

[0014] Finished product specifications: outer diameter 10mm*wall thickness 2.5mm, center hole 0.8mm

[0015] Conduct one to four air-drawings of copper tubes with state M, grade T2, outer diameter 50mm, wall thickness 5.5mm, and unlimited length until the outer diameter is 21mm and the inner hole diameter is 10±0.5mm, at 520 Anneal at ℃±10℃ for 3-5 hours, cool for 5-6 hours; then perform one to four air-drawings to an outer diameter of 17mm and an inner hole diameter of 8±0.5mm, and anneal at 520℃±10℃ for 3-5 hours hours, cool for 5-6 hours; put the core liner in the center hole, and then draw it empty, replace the core liner with a smaller size, and then draw it empty again, and cycle in turn until the copper tube is drawn into a state of Y , Outer diameter is 10mm, center hole diameter is 0.8mm.

[0016] Note: According to the needs of users, it can be made into products with an outer diameter of less than 12mm and a central hole diameter of 0.5-1mm.

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Abstract

A manufacturing method of a thick-wall microporous copper pipe, which belongs to the manufacture field of copper pipes, comprises the following steps of: subjecting the copper pipe with a state M, a trademark T2, an outer diameter 38 to 50 mm, a wall thickness 5 to 6 mm and an unlimited length to non-mandrel drawing, annealing, non-mandrel drawing and annealing; arranging a die core in a central hole; non-mandrel drawing; replacing a smaller die core; non-mandrel drawing; sequentially circulating until the copper pipe is drawn to the copper pipe with a state Y, an outer diameter less than 12 mm, and a central hole diameter 0.5 to 1 mm. The method can manufacture the copper pipe with thicker wall, smaller central hole and no core shift, and can lower the manufacture cost of manufacturers.

Description

technical field [0001] The invention relates to a method for manufacturing a copper tube. Background technique [0002] Thick-wall microporous copper pipe is a new product with high efficiency and energy saving. For a long time, my country has not solved the technical problems of thick-wall microporous production technology. For this kind of products, one is to rely on imports from abroad and the price is expensive; the other is to adopt cumbersome procedures. Use the instrument lathe to drill holes on the copper rods and string them with the required steel wires before forging. After forging, take out the steel wires to achieve the purpose of punching copper rods. However, a fatal problem in this method is that the center hole is easy to deviate. Shifting, resulting in a large number of substandard products, so the problem of eccentricity has not been well resolved, resulting in a waste of manpower, material resources and other resources. Contents of the invention [0003]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C1/22C21D9/08C21D11/00
Inventor 蒋再良周军蒋超朱萍徐春燕杨晓程庄琦
Owner 江苏金圣铜业科技有限公司