Machining technology heat treatment process
Time:
2024-04-30 18:16
Source:
With the development of aerospace, industry, microelectronics industry, modern and bioengineering technology, the demand for / detailed mechanical parts (feature size in the micron to millimeter level) is increasingly urgent. The specificity of its structure and shape, the diversity of part materials, size and surface quality of the accuracy of the good to become a highly detailed mechanical parts and their micro devices and equipment, the use of functionality, material properties, structural shape, sex and other aspects of the requirements are also increasingly high.
With the rapid development of modern detailed machining, the rapid development of detailed machining technology, slowly emerged a lot of detailed machining technology methods, such as micro-detailed machining technology, fast molding technology, ultra-machining technology.
Inserting heat treatment at the appropriate time in the process of meticulous mechanical processing can make the cold and hot processes work well together and avoid deformation brought about by heat treatment. The arrangement of heat treatment, according to the purpose of heat treatment, generally can be divided into:
1、The purpose of preparatory heat treatment is to remove the internal stresses generated during the manufacturing process of blanks, improve the cutting performance of metal materials, and prepare for the later heat treatment. Belong to the preparatory heat treatment of tempering, annealing, normalizing, etc., generally arranged in the roughing before, after. Arranged before rough machining, can improve the cutting performance of the material; arranged after rough machining, is conducive to the removal of residual internal stresses。
2、Heat treatment should generally be arranged in roughing, semi-finishing after finishing before and after finishing. Deformation of the heat treatment, such as carburizing quenching, tempering, etc., should be arranged in the finishing process before the deformation in order to correct the heat treatment in the finishing process; deformation of the heat treatment of small, such as nitriding, etc., can be arranged after finishing process。
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Machining installation sequence and process
Determine the cutter point and tool change point; once determined, it is not suitable for substitution.
Machining technology heat treatment process
With the development of aerospace, industry, microelectronics industry, modern and bioengineering technology, the demand for / detailed mechanical parts (feature size in the micron to millimeter level) is increasingly urgent.
Details of machining, forging and casting
In the process of using detailed mechanical processing, its mechanical properties are better than cast iron, but the cast iron properties of this material is poor, the melting point is higher than other materials.
Machined surfaces and solidification knowledge
fine machining processing is convenient, the use of saving its materials, in the process of operation can save its resources, many casting methods can only cast relatively simple castings, and another advantage of fine machining is that complex castings can be cast.
the role of additives in the process of fine machining will no longer be limited to helping the shell quickly build up the wet strength, but also improve the development of its investment casting quality, the surface quality of the silica sol shell is good and its high temperature.
Machining process and technology
fine machining can be divided into upper and lower die methods, which can be completed through comprehensive processes such as planing, milling, etching, turning, and EDM. The size and pit shape of the fine machining are consistent with the edge of the product, mainly because the wax die is mainly used for industrial wax forming, so its melting point is not high and the hardness is not high when selecting, and the aluminum alloy material with relatively cheap and light weight is used as a mold.