Turning is a machine that is a part of a machine. The lathe is mainly used for machining of rotary workpiece. The lathe is mainly used for machining shaft plate and other workpieces with rotating surface, is a kind of machine tool processing machinery manufacturing and repair plant in the most widely used.
It is on the lathe, the use of rotary motion of the workpiece and the cutting tool of linear motion or curve movement to change the shape and size of the blank, it is processed into compliance with the requirements of the drawings.
Machining is a method of machining the workpiece by using the workpiece relative to the tool. Cutting can be mainly provided by the workpiece instead of the cutting tool. Turning is the most basic and most common method of machining, which plays a very important role in the production. Lathe for processing rotary surface, most has the rotary surface of workpiece can be machined by turning method, such as the external cylindrical surface, conical surface, inner and outer face, groove, screw and rotary forming surface, the tool is mainly used tools.
In all kinds of metal cutting machine tools, the lathe is the most widely used one type, accounting for 50% of the total number of machine tools. The lathe can be used for machining of the workpiece, and available bits, reamers, taps and knurling knife drilling, reaming, tapping and knurling operation. According to the process characteristics, layout and structure characteristics of different lathe can be divided into horizontal lathe landinglathe vertical lathe turret lathe, lathe, horizontal lathe with most of them.
Security technology issues
Turning on the machine manufacturing industry is used most widely, lathe large quantity, personnel, processing a wide range of tools and fixtures used are various, so turning the security technology, it is especially important, the focus of the work are as follows:
1, chip damage and protective measures. Lathe machining of various parts of the toughness of the steel is better, when the cutting chip produced by plastic curl, sharp edges. In the high-speed cutting steel will be formed when the red chip, very long, very easy to hurt, and often wound on the workpiece, tool and tool, so the work should often use hook clean or broken, when necessary, should stop clearance, but no hand to remove or pull off. In order to prevent chip damage, chip breakage, control chip flow direction and various protective baffles are adopted. The measures are in chip breaking on grinding tool chipbreaker or step out; using appropriate chipbreaker, using mechanical clamping tool.
2, the workpiece loading card. In the process of turning, because the workpiece clamping improper damaged machine, broken or damaged tool and workpiece drop or flying away accident number. Therefore, in order to ensure the safe production of turning, the workpiece must be paid special attention to. Of different sizes and shapes of the parts need to choose the suitable fixture, regardless of the connection of three claw, four claw chuck or special fixture and the shaft must be stable and reliable. The workpiece must be clamped, clamped, and the large workpiece clamping can be used to ensure that the workpiece rotates at high speed, and the cutting force is not shifted, does not fall off and is not thrown out. When necessary, can be used at the top, center, etc.. Take off immediately after the card is tight.
3, safe operation. Before working to fully check the machine, to confirm the good side can be used. The workpiece and tool to ensure that the position is correct, firm and reliable. During the machining process, it is necessary to stop the cutting tool, load and unload the workpiece and measure the work piece. The work piece must not touch or use the cotton yarn to wipe at the time of rotation. The cutting speed, feed rate and depth should be chosen properly. The head of a bed, and the bed rest shall not be placed the workpiece, fixture and other sundries. Use a file to the tool moving to the safety position, the right front, left behind, to prevent the sleeve involved. Machine tools must be responsible for the use and maintenance, and other personnel shall not be used.
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