In the process of machining mechanical parts, the reasonable arrangement of heat treatment process can make the cold and hot process better together, to avoid the deformation brought about by heat treatment. So we know how to reasonably arrange the heat treatment process location? Next by the editor to share!
1、Preparatory heat treatment The purpose of the preparatory heat treatment is to eliminate the internal stress generated during the manufacturing process of the blank, improve the cutting performance of metal materials, and prepare for the final heat treatment. Belonging to the preparatory heat treatment are tempering, annealing, normalizing, etc., generally arranged in the rough machining before, after. Arranged in the roughing before, can improve the cutting performance of the material; arranged in the roughing after, conducive to the elimination of residual internal stress.
2, the final heat treatment should generally be arranged in the roughing, semi-finishing machining, finishing before and after. Deformation of larger heat treatment, such as carburizing quenching, tempering, etc., should be arranged before finishing, in order to correct the deformation of heat treatment in finishing; deformation of smaller heat treatment, such as nitriding, etc., can be arranged after finishing.
3, aging treatment The purpose of aging treatment is to eliminate internal stress, reduce the deformation of the workpiece. Aging treatment is divided into natural aging, artificial aging and ice cold treatment three categories. Ageing treatment is generally arranged after roughing, before finishing; for high precision parts can be arranged after semi-finishing and then an ageing treatment; ice-cooling treatment is generally arranged after tempering or finishing or the last of the process.
4, surface treatment in order to surface anti-corrosion or surface decoration, sometimes need to surface plating or bluing and other treatment of this surface treatment is usually arranged at the end of the process.
Production process refers to the entire process from raw materials (or semi-finished products) into products. For machine production, it includes transportation and storage of raw materials, preparation of production, manufacture of blanks, processing and heat treatment of parts, assembly, and commissioning of products, painting and packaging. Modern enterprises use the principles and methods of system engineering to organize production and guide production, and view the production process as a production system with input and output. It can make the management of the enterprise scientific and make the enterprise more resilient and competitive.
In the production process, the process of directly changing the shape, size and performance of raw materials (or blanks) into finished products is called the process. It is the main part of the production process. For example, the billet casting, forging and welding; heat treatment to change the properties of materials; parts of mechanical processing, etc., are part of the process. Processes are composed of one or several sequential processes.
The process is the basic unit of the process. A process is the part of the process that is completed continuously at a workplace for a workpiece or group of workpieces. The main characteristics of a process are that it does not change the object, equipment or operator, and that the process is completed continuously.