What do turners, locksmiths and welders do? *

Fitter: Fitter mostly uses hand tools and often performs manual operations on bench vises. The fitter's main task-machining parts: some machining that is not suitable or can't be solved by mechanical methods can be completed by the fitter. Such as: scribing in the process of machining parts, precision machining (such as scraping cutting templates to make molds, etc.). ) and inspection and maintenance. Assembly: According to the assembly technical requirements of mechanical equipment, the parts are assembled, and the parts are assembled by general assembly. After adjustment, inspection and debugging, they become qualified mechanical equipment. Equipment maintenance: If the machinery fails, is damaged or its accuracy drops after long-term use, it should also be maintained by locksmith. Tool manufacturing and repair: manufacturing and repairing all kinds of tools, fixtures, measuring tools, molds and various professional equipment. The fitter's operation skills-scribing, chiseling, sawing, filing, drilling, reaming, sinking, reaming, tapping, straightening and bending, riveting, scraping, grinding, machine assembly and debugging, equipment maintenance, measurement and simple heat treatment. Type of fitter-fitter (general fitter): one who assembles, trims and processes parts. Machine fitter: Mainly engaged in the maintenance and repair of various mechanical equipment. Tool fitter: mainly engaged in the manufacture and repair of tools, molds and cutters. Go to 1. Turning is a method of machining with lathe. Lathe is mainly used to process all kinds of revolving surfaces, such as inner and outer cylindrical surfaces, conical surfaces, forming revolving surfaces and end faces. Lathes can also process threaded surfaces. If the hole processing tools (such as drill, reamer, etc. ), the inner circular surface can also be processed. Lathes account for the largest proportion of metal cutting machines in general machine tool plants, accounting for about 30% of the total number of machine tools. There are many kinds of lathes, which can be divided into horizontal lathes, vertical lathes, turret lathes, multi-tool lathes, copying lathes, single-axis longitudinal cutting automatic lathes, multi-axis bar automatic lathes and so on. In addition, there are crankshafts, A-axis lathes, shovel lathes and other lathes. Among all kinds of lathes, the common lathe is the most widely used universal machine tool, and its transmission and structure are also very typical. Therefore, this chapter mainly analyzes the common lathe cA6 140, and learns the general method of analyzing machine tools. Almost all kinds of general machine tools have their corresponding CNC machine tools, and the requirements of the two types of machine tools are also different. CNC lathe is a widely used CNC machine tool at present. 2. Lathe workers can also be interpreted as lathe operators. Definition: The so-called "welder" is a worker who carries out welding work. As a sought-after job, welder is being brought into play more and more. It is one of the high-paying jobs and one of the hardest jobs. Mainly in its harm to the human body. Inhalation of toxic gas will cause the welder's lung to sink and its high temperature. The welder's work often makes the work clothes completely wet. Junior welders often get electro-optic ophthalmia. In the welding machine,