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Technical introduction and safety technical issues of turning processing

Views:72     Author:Ronsco     Publish Time: 2021-05-07      Origin:Ronsco

Turning processing is lathe processing, which is a part of mechanical processing. Lathe processing mainly uses a turning tool to turn a rotating workpiece. Lathes are mainly used for machining shafts, discs, sleeves and other rotating or non-rotating workpieces with rotating surfaces. It is the most widely used type of machine tool processing in machinery manufacturing and repair factories.


Technical introduction of turning processing


Turning processing is to use the rotary motion of the workpiece and the linear or curved motion of the tool to change the shape and size of the blank on a lathe, and process it to meet the requirements of the drawing.


Turning is a method of cutting the workpiece on the lathe by rotating the workpiece relative to the tool. The cutting energy of turning is mainly provided by the workpiece rather than the tool. Turning is the most basic and common cutting method, and it occupies a very important position in production. Turning is suitable for machining revolving surfaces. Most workpieces with revolving surfaces can be processed by turning methods, such as inner and outer cylindrical surfaces, inner and outer conical surfaces, end surfaces, grooves, threads, and revolving forming surfaces. The tools used are mainly turning tools.


Among all types of metal cutting machine tools, lathes are the most widely used, accounting for about 50% of the total number of machine tools. The lathe can not only use turning tools to turn the workpiece, but also use drills, reamers, taps and knurling tools for drilling, reaming, tapping and knurling operations. According to different process characteristics, layout forms and structural characteristics, lathes can be divided into horizontal lathes, floor lathes, vertical lathes, turret lathes and profiling lathes, most of which are horizontal lathes.


Safety technical issues in turning processing


Turning processing is one of the most widely used in the machine manufacturing industry. There are a large number of lathes, a large number of personnel, a wide range of processing, and many tools and fixtures are used. Therefore, the safety technology of turning processing is particularly important. , Its key tasks are as follows:



1. Damage from cutting chips and protective measures.


The toughness of various steel parts processed on the lathe is better, the chips produced during turning are full of plastic curl, and the edges are relatively sharp. During high-speed cutting of steel parts, red hot and long chips are formed, which are very easy to hurt people. At the same time, they are often wound on the workpiece, turning tools and tool holders. Therefore, iron hooks should be used to clean up or break them in time during work. It should be stopped to remove it when it is time, but it is never allowed to remove or pull off by hand. In order to prevent chip damage, chip breaking, chip flow control measures and various protective baffles are often taken. The chip breaking measure is to grind chip breakers or steps on the turning tool; use a suitable chip breaker and mechanically clamp the tool.



2. The clamping of the workpiece.


In the process of turning, there are many accidents that damage the machine tool, break or break the tool, and cause the workpiece to fall or fly out due to improper clamping of the workpiece. Therefore, in order to ensure the safe production of turning processing, special attention must be paid when loading the workpiece. For parts of different sizes and shapes, appropriate clamps should be selected, regardless of whether the three-jaw, four-jaw chuck or the connection between the special clamp and the spindle must be stable and reliable. The workpiece should be clamped and clamped. The sleeve can be used to clamp the large workpiece to ensure that the workpiece does not shift, fall off, or throw out when the workpiece is rotated at high speed and cut. If necessary, use the center frame, center frame, etc. to enhance the clamping. Remove the handle immediately after the card is tightened.



3. Safe operation.


Before working, check the machine tool thoroughly and confirm that it is good before use. The clamping of the workpiece and the tool ensures the correct position, firmness and reliability. During the machining process, the machine must stop when changing tools, loading and unloading workpieces, and measuring workpieces. The workpiece should not be touched by hand or wiped with cotton silk when rotating. The cutting speed, feed rate and strenuous depth must be selected appropriately, and overload processing is not allowed. Workpieces, fixtures and other sundries are not allowed to be placed on the head of the bed, the knife rest and the surface of the bed. When using a file, move the turning tool to a safe position, with the right hand in front and the left hand in the back to prevent the sleeves from being caught. The machine tool must have a dedicated person responsible for use and maintenance, and other personnel must not use it.


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