Method and apparatus for manufacturing reducing pipe

A manufacturing method and a manufacturing device technology, which are applied in the field of manufacturing and device of reducing tubes, can solve the problems of difficult to accurately locate, not completely fit, and difficult to ensure capillary tubes, etc., and achieve high production efficiency, fewer detection control points, and low cost. Effect
CN1528542AInactive Publication Date: 2004-09-15广州冠华金属精工制造有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
广州冠华金属精工制造有限公司
Publication Date
2004-09-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates variable aperture tube making method and device, including tube end rotary forging and draw stretching. It first forges one end of the tube on the rotary forger into a smaller-aperture technical tube, which makes the stretching mould through to be clamped by the clamping module; using a hydraulic control system to drive clamping base and clamping module; inserting core rod with mould head in the copper tube to stretch by the stretching mould. It includes rotary forger and draw-stretching device. The clamping module, the stretching mould and the core rod makes up a stretching process line. The position of the core rod is adjustable and the stretching effect is good. The hydraulic control system is installed with travel switch to control stretching travel. It is applied to the control of thin-wall small-aperture copper tube and widely applied to cryogen pipeline in refrigerating industry.
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Description

technical field

[0001] The invention relates to a method and a device for manufacturing a diameter-reducing tube, in particular to a method and a device for stretching and manufacturing a diameter-reducing pipe used as a refrigerant pipeline in the refrigeration industry. Background technique

[0002] In the refrigeration industry such as air conditioners and refrigerators, a large number of copper tubes are used as refrigerant circulation pipes. Due to technological needs, such as throttling and pressure reduction and flow control, etc., it is often necessary to connect the capillary tube with the transition tube, or connect two sections of copper tubes with different diameters to form a tapered tube or a trapezoidal tube. Reducer, or multi-stage trapezoidal tube. The existing reducing pipes used in the refrigeration industry are basically manufactured by welding. As we all know, copper metal welding, especially seam welding of thin-walled and small-diameter copper pipes,...

Claims

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