Correction of Defects in Machine Tool Castings: Based on the repair results of several traditional welding techniques on the defects of machine tool bed castings, analyze the reasons for the inadequate correction results of machine tool castings. After studying the correction results of forging defect repair machines on machine tool castings, a feasible new technology and its techniques for correcting machine tool castings have been determined. Using a forging defect repair machine to correct the defects of forged parts, the castings can undergo any mechanical processing without heating up, deformation, cracking, fine welding points, stiff spots, or annealing appearance during the correction process. The selection of supplementary materials is not limited by the raw materials, and through the selection of different raw materials for supplementary materials, it is possible to achieve consistency in the welding point function, color, and matrix. The connection between the supplementary material and the parent material is metallurgical, with high strength and no occurrence of dropping. The welding quality meets the quality inspection standards for machine tool castings, and is a new technology worthy of widespread promotion.
Regarding the major drawbacks of machine tool castings, we recommend the combined application of traditional welding repair techniques and forging defect repair machines. However, the welding repair scale of the forging defect repair machine is a process of repeated melting and accumulation of welding repair points with a diameter of Φ 1.5- Φ 1.2mm. In the large-scale defect repair process, the correction power is the only factor that restricts its widespread application. The prevailing heat treatment technology reduces the stress and deformation of castings to a minimum. Persistent use tends to be more stable. The raw materials for machine tool castings are all fine grey cast iron HT200-HT300, which has higher tensile and bending strength