Large casting thermal shape righting method

Abstract

The invention provides a large casting thermal shape righting method. The method comprises the following steps that a shape righting tool is provided, the shape righting tool comprises a base, a pressing plate, a supporting screw and a locking nut, the base is fixedly connected with the supporting screw, and the tail end of the supporting screw is in threaded connection with the locking nut; a casting is clamped between the base and the pressing plate, and the casting is subjected to shape righting by screwing the locking nut; solution treatment is carried out on the casting obtained after shape righting and the shape righting tool at the same time, that is, the casting and the shape righting tool are heated at the same time to the solution temperature of a casting material, and the casting and the shape righting tool are transferred into water immediately simultaneously, and are cooled to room temperature; and the casting subjected to solution treatment is taken down from the shape righting tool. By the adoption of the technical scheme, the casting and the shape righting tool are kept consistent in thermal deformation in the righting process, the size of the corresponding part onthe surface of the casting can be easily righted to be within the preset range, the situation that after the casting is taken down, the surface of the casting is deformed and rebounded is avoided, andthe casting correcting precision and the product percent of pass are improved.

Description

technical field [0001] The invention relates to the technical field of casting technology, in particular to a method for thermal rectification of large castings. Background technique [0002] After the casting is cast, in order to improve the forming quality of the finished casting, it is usually necessary to rectify the finished casting. The existing casting rectification process is generally carried out in the cooling state of the casting surface. In addition, for aluminum alloy castings, it is also necessary to rectify the finished casting. Solution treatment, aging treatment and other measures are carried out to improve the mechanical properties of castings. The so-called solution treatment is the process of heating the castings to the corresponding solution temperature, and then putting the castings in water for rapid cooling. However, when the castings are in the cooling state After the correction, the solution treatment is carried out. During the solution treatment, t...

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Problems solved by technology

[0002] After the casting is cast, in order to improve the forming quality of the finished casting, it is usually necessary to rectify the finished casting. The existing casting rectification process is generally carried out in the cooling state of the casting surface. In addition, for aluminum alloy castings, it is also necessary to rectify the finished casting. Solution treatment, aging treatment and other measures are carried out to improve the mechanical properties of castings. The so-called solution treatment is the process of heating the castings to the corresponding solution temperature, and then putting the castings into water for rapid cooling. However, when the castings are in the cooling state After the correction, the solution treatment is carried out. During the solution treatment, the casting is prone to deformation again, which affects the accuracy of the casting's shape and size. In addition, when the casting is subjected to solution treatment, the corresponding part of the original corrected size will rebound. Deformation, which affects the final dimension accuracy of the casting

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