Knowledge of precision machining

1. In mechanical processing routes, heat treatment processes are often arranged. The arrangement of heat treatment process locations is as follows: To improve the cutting performance of metals, such as annealing, normalizing, quenching and tempering, it is generally arranged before mechanical processing. To eliminate internal stress, such as aging treatment, quenching and tempering treatment, it is generally arranged after rough machining and before precision machining. In order to improve the mechanical properties of parts, such as carburizing, quenching, tempering, etc., they are generally arranged after mechanical processing. If there is significant deformation after heat treatment, the final processing steps must also be arranged.

2. To ensure machining accuracy, it is best to separate rough and fine machining. Due to the large amount of cutting during rough machining, the workpiece is subjected to high cutting and clamping forces, generates a lot of heat, and exhibits significant work hardening on the machined surface. There is also a large internal stress inside the workpiece. If rough and rough machining are carried out continuously, the precision of the precision machined part will be quickly lost due to the redistribution of stress. For certain parts that require high machining accuracy. After rough machining and before precision machining, low-temperature annealing or aging treatment should also be arranged to eliminate internal stress.  

3. Reasonably select equipment. Rough machining mainly involves cutting off most of the machining allowance and does not require high machining accuracy. Therefore, rough machining should be carried out on machine tools with high power and low precision, while precision machining requires the use of high-precision machine tools. Rough and precision machining are carried out on different machine tools, which can fully utilize the equipment's capabilities and extend the service life of precision machine tools.  

Future Development Trends of Precision Machining

'Single variety, large quantity' has become a new feature of production methods for many Fortune 500 companies; At the same time, the production mode dominated by producers is gradually shifting towards a customized production mode dominated by consumers. The personalization of services has become an important factor in the success or failure of competition.

The globalization of the mechanical manufacturing industry has undergone new changes

There are two traditional ways of globalization: one is to use the home country as a production base and sell products to other countries; The second is to invest in establishing production and manufacturing bases overseas, manufacture products abroad, and sell them to host countries or other countries.

Its characteristics are: having its own manufacturing facilities and technology, and the products are completely manufactured by itself; In terms of resource utilization, it is limited to using the host country's raw materials, personnel, or funds.

With the information technology revolution and fundamental changes in management ideas and methods, the organizational forms of enterprises have also undergone changes. These changes have occurred in multinational corporations and will continue to develop as a new form of globalization.

The main feature of this change is the extensive use of production facilities and technological capabilities from other countries. Produce final products and sell them globally without owning production facilities or manufacturing technology.

Mechanical manufacturing companies establish a global component processing network and are responsible for the final assembly and marketing of their products. The globalization of raw material allocation and component procurement has become a development trend in the world's machinery manufacturing industry.