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Method for cold forming of pipe fittings

A technology for cold forming and pipe fittings, applied in the field of metal pipe fittings processing, can solve the problems of high production cost, high mold manufacturing precision requirements, complex equipment and control systems, etc., and achieve reliable product quality assurance, uniform metal deformation, and low mold costs. Effect

Inactive Publication Date: 2016-10-05
重庆麦卡瑞机械制造有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The main problem of this method is that the equipment and control system are complex, the manufacturing precision of the mold is high, and the cavity of the tube blank needs to be sealed before the metal tube is formed, so the production cost is high

Method used

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with embodiment:

[0011] A cold forming method for pipe fittings. When manufacturing metal pipe fittings, PCH alkane filler is used as the pressure transmission medium. With the help of molds, the metal pipe blank is axially compensated and deformed on a multi-directional hydraulic forming machine. The entire forming process is completed in one cold state. .

[0012] Further, the PCH alkane filler composition is [CH] 80% to 95%, [CH] 14% to 25%, and [CH] 6% to 22%. Heating after mixing, the temperature is 90°C-100°C, and the time is 20-35 minutes.

[0013] Further, during the forming process of equal-diameter T-shaped copper pipe joints, thrust should be applied to the push rods on the left and right sides in the horizontal direction at the same time, with a pressure of 10-25 MPa and a time of 1.5 minutes.

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Abstract

The invention discloses a method for cold forming of pipe fittings. In manufacturing of metal pipe fittings, PCH alkane filler serves as a pressure transmitting medium, and axial compensation of metal pipe blanks is performed on a multidirectional hydraulic forming machine by the aid of a die. The whole forming process is completed under a cold condition. By the method for cold forming of the pipe fittings, a new approach is provided for cutting-free or less-cutting deep machining of metal materials.

Description

technical field [0001] The invention relates to a cold forming method for pipe fittings, which belongs to the technical field of metal pipe fitting processing. Background technique [0002] At present, two methods are usually used to manufacture metal pipe fittings by cold forming at home and abroad: one is the rubber convex method, and the other is the hydraulic bulging method. The rubber convex method is to put the rubber rod into the tube blank, and the tube blank is placed in the female mold, and the metal is deformed by one-way punching. The main problem of this method is that the metal tube blank is stamped in one direction when the rubber is convex, and the deformation is uneven along the length direction, and the convex pressure cannot be adjusted; at the same time, the rubber rod used is expensive and cannot be applied to products of different specifications. After being scrapped, it cannot be used repeatedly. The hydraulic bulging method is to fill the tube blank...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/037
Inventor 凌庭贵
Owner 重庆麦卡瑞机械制造有限公司
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