Forced vibration and installation requirements for large-scale machining

In the process of large-scale machining and production, those processes that are directly related to the transformation of raw materials into products will be called technological processes. To a certain extent, they effectively include blank manufacturing, parts processing, heat treatment, quality inspection, and machine assembly. The manufacturing of tools, fixtures, and machine tool adjustment and maintenance required for the normal process of the process are auxiliary processes.

Technical personnel of large-scale mechanical processing need to determine the process to be adopted during operation according to the quantity of their products, equipment conditions, and the quality of the workers, and write the relevant content into process documents, which are called process regulations. In order to facilitate the preparation, execution and production organization management of the process regulations, the process needs to be divided into units of different levels.

Large-scale mechanical processing is the process, installation, station, work step and knife. The process is the basic unit in the process. The machining process of parts consists of several processes. One process may include one or several installations, each installation may include one or several stations, each station may include one or several steps, and each work step may include one or several passes. .

Forced vibration in large-scale machining
1. Forced vibration: Vibration directly caused by the external periodic interference force of the process system during operation. Forced vibration in machining is no different from forced vibration in general machinery. The frequency of forced vibration Same as the frequency of the interference force or a multiple of it.
2. Reasons for forced vibration: the vibration source of forced vibration comes from the internal vibration source inside the machine tool and the external vibration source from outside the machine tool. There are many external vibration sources, but they are all transmitted to the machine tool through the foundation, which can be isolated by adding a vibration isolation foundation.
In-machine vibration sources in large-scale machining mainly include
1. Vibration of machine tool motor.
2. Vibration caused by unbalanced high-speed rotating parts of machine tools.
3. Vibration caused by defects of machine tool transmission mechanism, such as gear backlash, belt tension change, etc.
4. Vibration caused by impact during cutting.
5. Vibration caused by the inertial force of reciprocating parts.