A Heat Treatment Deformation Control Method for Large Thin Plate Cast Aluminum Box Cover
A technology of heat treatment deformation and control method, which is applied in the field of heat treatment technology, can solve the problems of low production efficiency, difficult control of heat treatment deformation of large thin-plate cast aluminum alloy box cover, and high production cost, so as to achieve low production cost and improve the stability of machining accuracy , to ensure the effect of stability
Active Publication Date: 2022-04-19
JIANGLU MACHINERY & ELECTRONICS GROUP
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Problems solved by technology
[0002] High power density is one of the important indicators to measure the advanced nature of the integrated transmission device, and lightweight is an important way to achieve high power density; in order to meet the requirements of weight reduction, an aluminum alloy case cover of an integrated transmission device chooses ZLl14A alloy with good comprehensive performance , the maximum length is 1078mm, the maximum width is 637mm, and the minimum thickness is 15mm, which is a typical large thin plate part; ZL114A can only achieve better after solid solution (quenching) aging (the heat treatment state specified in GB / T1173 is T5). Mechanical properties. During the solid solution process, the heat treatment deformation of the large thin-plate cast aluminum alloy box cover is particularly difficult to control; the casting state of the part has a machining allowance of 4mm on one side in the wall thickness direction, and the traditional vertical hanging water quenching method is adopted. Its deformation reaches more than 10mm, and it needs repeated corrections between solid solution and aging to make its deformation barely meet the requirements of machining, resulting in high production costs and low production efficiency; in order to solve this problem, a large thin plate cast aluminum alloy was invented. Heat Treatment Process of Alloy Box Cover
Method used
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Embodiment 1
[0028] like Figure 1-3 As shown, a heat treatment deformation control method of a large thin plate cast aluminum box cover 1 comprises the following steps:
[0029] Step 1: Using the finite element method, establish a three-dimensional model of the aluminum alloy box cover 1 and discretize it. According to the properties of the ZL114A alloy material, the two bearing housing holes 12 are used as the hanging points to impose constraints, and the existing heat treatment process is used as the condition. Numerical calculations are carried out based on the principle, and the results show that the lower side of the box cover 1 is prone to warping and twisting deformation after quenching;
[0030] Step 2: According to the simulation results, spot-weld three ZL114A alloy reinforcing ribs 11 on the parts of the box cover 1 that are prone to warping and twisting deformation. The end point is welded near the bearing seat hole 12 of the box cover 1, and the specification size is ≥30mm×4...
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Abstract
The invention discloses a heat treatment deformation control method for a large thin-plate cast aluminum box cover, which is used for heat treatment deformation control. The invention relates to the technical field of heat treatment technology; it includes the following steps: simulation → spot welding and stretching → configuration solution → furnace loading → steps Heating→solution treatment→cleaning→aging treatment→removal of tie bars. On the basis of not designing complicated tooling, the present invention adopts measures such as spot welding the tension bars on the easily deformable part of the box cover to enhance rigidity, configuring a solution with suitable cooling capacity and a reasonable furnace charging method, etc., on the basis of ensuring the mechanical properties of the cast aluminum alloy , the plane warping deformation during the heat treatment of the box cover is controlled to ≤2mm, no leveling process is required, the production cost is low and the efficiency is high.
Description
technical field [0001] A heat treatment deformation control method for a large thin-plate cast aluminum box cover is used for heat treatment deformation control, and the invention relates to the technical field of heat treatment technology. Background technique [0002] High power density is one of the important indicators to measure the advanced nature of the integrated transmission device, and lightweight is an important way to achieve high power density; in order to meet the requirements of weight reduction, an aluminum alloy case cover of an integrated transmission device chooses ZLl14A alloy with good comprehensive performance , the maximum length is 1078mm, the maximum width is 637mm, and the minimum thickness is 15mm, which is a typical large thin plate part; ZL114A can only achieve better after solid solution (quenching) aging (the heat treatment state specified in GB / T1173 is T5). Mechanical properties. During the solid solution process, the heat treatment deformati...
Claims
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IPC IPC(8): C22F1/043
CPCC22F1/043C22F1/002
Inventor 刘克杨兵宋海锋舒兵朱旭王倩
Owner JIANGLU MACHINERY & ELECTRONICS GROUP