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Thermal internal high pressure formation method for light alloy tube (or pipe)

An internal high pressure forming, light alloy technology, applied in the field of forming pipe parts, can solve the problems of difficult processing and poor formability of light alloy pipes, and achieve the effect of fewer parts, improved formability and light weight

Active Publication Date: 2006-03-29
天津哈工永兴科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of poor formability and difficult processing of existing light alloy pipes at room temperature, the present invention provides a hot-state internal high-pressure forming method for light alloy pipes. The specific technical scheme for solving the above problems is as follows:

Method used

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  • Thermal internal high pressure formation method for light alloy tube (or pipe)
  • Thermal internal high pressure formation method for light alloy tube (or pipe)

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Experimental program
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Effect test

specific Embodiment approach 1

[0012] Step 1, first heat the mold 2 to 150-500°C; the temperature of the mold 2 can be controlled by the heating device 5 provided on the mold 2 (the heating device 5 adopts thermal resistance or hot oil circulation mode) and the injected hot liquid medium 4 ( The temperature of the hot liquid medium 4 adopts hot oil) to control;

[0013] Step 2, put the aluminum alloy or magnesium alloy tube blank 3 at normal temperature or through preheating into the mold 2 heated in step 1, and close the mold 2;

[0014] Step 3. After the sliding punch 1 in the middle of the mold 2 closed in step 2 is in contact with both ends of the tube blank 3 and sealed with high pressure, inject the tube blank 3 through the pipeline 6 at a temperature of 150-500°C and Hot liquid medium 4 with a pressure of 0-250Mpa (see figure 1 );

[0015] Step 4. When the temperature of the mold 2, the tube blank 3 and the hot liquid medium 4 after step 3 is in the range of 150-500°C, by controlling the axial disp...

specific Embodiment approach 2

[0019] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mold 2 in step 1 is heated to 150°C, and the temperature of the mold 2, tube blank 3 and hot liquid medium 4 in step 4 is 500°C. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0020] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the mold 2 in step 1 is heated to 300°C, the temperature of the tube blank 3 and the hot liquid medium 4 in step 4 is 300°C, and the temperature of the hot liquid medium 4 is 300°C. The pressure is 150Mpa. Other steps are the same as in the first embodiment.

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Abstract

A hot-state internal high pressure method for manufacturing the light alloy pipe includes such steps as heating die set to 150-500 deg.C, putting a pipe blank in the die set, closing die set, making the punch heads in contact with both ends of pipe blank, sealing the contact positions, filling hot-state liquid medium at 150-500 deg.C in the pipe blank, and applying pressure to deform the pipe blank to obtain light alloy pipe. Its advantages are light weight and high rigidity.

Description

technical field [0001] The present invention relates to a method of forming tubular components. Background technique [0002] Energy crisis and environmental pollution are two major problems faced by human beings. Vehicles, airplanes and other means of transportation account for a large proportion of energy consumption, and vehicle exhaust is also a major source of air pollution. Reducing the weight of automobiles and airplanes is one of the measures to reduce energy consumption and pollution emissions. The main way to reduce weight is to use lightweight materials and lightweight structures. Lightweight materials include aluminum alloys, magnesium alloys, titanium alloys and composite materials. The main forms of light body structure include integral structure, thin shell and hollow variable section. For hollow variable cross-section parts, the traditional manufacturing process is generally to stamp two halves and then weld them into a whole. The process is complicated a...

Claims

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Application Information

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IPC IPC(8): B21D26/02B21D26/033
Inventor 苑世剑何祝斌
Owner 天津哈工永兴科技有限公司
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