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Heat treatment deformation control method of thin-wall saddle-shaped aluminum alloy casting

An aluminum alloy casting and heat treatment deformation technology, which is used in the heat treatment deformation control of cast aluminum alloy, the heat treatment deformation control of thin-walled saddle-shaped aluminum alloy castings, and the heat treatment of large thin-walled cast aluminum alloy parts. Complex structure, affecting product processing and final use, etc., to achieve the effect of easy operation, high performance, and avoiding difficult control of precision

Active Publication Date: 2014-06-04
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for structural parts with complex shapes, if the traditional solution-aging process is used for heat treatment, large deformation will occur, especially due to the difference between the front and rear ends of the product when they are solid-soluted into water, the end that enters the water first opens, and the end that enters the water last The closing of the mouth seriously affects the subsequent processing and final use of the product, while the thin-walled saddle-shaped aluminum alloy casting with a wall thickness of 2 to 4 mm has a more complex structure and greater deformation

Method used

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  • Heat treatment deformation control method of thin-wall saddle-shaped aluminum alloy casting
  • Heat treatment deformation control method of thin-wall saddle-shaped aluminum alloy casting
  • Heat treatment deformation control method of thin-wall saddle-shaped aluminum alloy casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The first step is to install the tooling: install the blocking tooling at both ends of the casting, and the structure of the blocking plate is as follows image 3 . Three clamps are installed at the front, rear and middle of the open part, and the positions of the three clamps are specified. The front clamp 6 is 60mm from the front, the middle clamp 8 is 600mm from the front, and the rear clamp 7 is from the front. 1200mm position. And apply pre-tightening force to the adjustable bolts, the front clamp 6 requires the adjustable bolts to be tight inside and loose outside, the rear clamp 7 requires the adjustable bolts to be tight outside and loose inside, and the internal and external constraints of the middle clamp 8 are consistent.

[0033] The second step is to determine the way of entering the furnace: choose the rear end 2 to face down, and place the castings vertically. Solid solution adopts bottom-pumping aluminum alloy quenching furnace. The method of entering...

Embodiment 2

[0040] The first step is to install the tooling: install the blocking tooling at both ends of the casting, and the structure of the blocking plate is as follows image 3 . Three clamps are installed on the open part, and the positions of the three clamps are specified. The front clamp 6 is 60mm from the front end, the middle clamp 8 is 600mm from the front end, and the rear clamp 7 is 1200mm from the front face. And apply pre-tightening force to the adjustable bolts, the front clamp 6 requires the adjustable bolts to be tight inside and loose outside, the rear clamp 7 requires the adjustable bolts to be tight outside and loose inside, and the internal and external constraints of the middle clamp 8 are consistent.

[0041] The second step is to determine the way of entering the furnace: select the rear end 2 to face down, and place the castings vertically. Solid solution adopts bottom-pumping aluminum alloy quenching furnace. The method of entering the furnace is as Figure ...

Embodiment 3

[0047] Embodiment 3: be the best embodiment of the present invention

[0048] The first step is to install the tooling: install the blocking tooling at both ends of the casting, and the structure of the blocking plate is as follows image 3 . Three clamps are installed on the open part, and the positions of the three clamps are specified. The front clamp 6 is 60mm from the front, the middle clamp 8 is 600mm from the front, and the rear clamp 7 is 1200mm from the front. And apply pretightening force to the adjustable bolts, the front clamp 6 requires the adjustable bolts to be tight inside and loose outside, the rear clamp 7 requires the adjustable bolts to be tight outside and loose inside, and the internal and external constraints of the middle clamp 8 are consistent.

[0049] The second step is to determine the way of entering the furnace: choose the rear end 2 to face down, and place the castings vertically. Solid solution adopts bottom-pumping aluminum alloy quenching fu...

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Abstract

The invention discloses a heat treatment deformation control method of a thin-wall saddle-shaped aluminum alloy casting. The heat treatment deformation control method is suitable for large thin-wall casting aluminum alloy parts. According to the characteristics of the casting, a blocking disc and a clamp are arranged on the casting before heating, one end with a thicker wall is put into a furnace by a vertical placement way; thermal stress during heating can be reduced by heating in stages; in a solid melting stage, deformation during quenching can be reduced by adjustable tooling shape maintainance; in an aging stage a pretightening force is continued to be applied for maintainance of a tooling constraining force. The advantages of the heat treatment deformation control method are that: the heat treatment deformation control method uses an adjustable tooling shape maintainance method in heating, solid melting and aging stages to solve the heat treatment deformation control problem of the thin-wall casting aluminum alloy and avoid the problems of repeated deformation calibration and difficulties in shape, position and size control after solid melting. By application of the pretightening force before heating and after solid melting according to deformation rules, the purpose of precise deformation control can be achieved.

Description

technical field [0001] The present invention relates to a heat treatment deformation control method for cast aluminum alloys, more specifically to a heat treatment deformation control method for thin-walled saddle-shaped aluminum alloy castings, which belongs to the field of heat treatment of cast aluminum alloys and is suitable for large-scale thin-walled cast aluminum alloy parts heat treatment. Background technique [0002] Aluminum alloy casting structural parts are widely used in aerospace, shipbuilding, rail transit and other fields due to their excellent performance, the ability to form complex components, and low cost. With the continuous improvement of production and manufacturing technical indicators, the structure of products is becoming more and more complex, and the degree of compactness is getting higher and higher. However, for structural parts with complex shapes, if the traditional solution-aging process is used for heat treatment, large deformation will oc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
Inventor 贺晓军何智勇尤逢海刘洋姚为胡晓雪吴凯
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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