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Precautions For CNC Turning

2022-07-25

The processing technology of CNC lathe is similar to that of ordinary lathe, but because CNC lathe is a clamping machine, which can continuously and automatically complete all turning processes, the following aspects should be paid attention to.
1. Reasonable selection of cutting parameters: for high-efficiency metal cutting, the processed material, cutting tools and cutting conditions are the three major elements.
2. Reasonable selection of tools:
(1) During rough turning, tools with high strength and good durability should be selected to meet the requirements of large back cutting and large feed during rough turning.

(2) When finishing turning, we should choose tools with high precision and good durability to ensure the requirements of machining accuracy.
(3) In order to reduce the time of tool change and facilitate tool setting, machine clamped knives and machine clamped blades should be used as much as possible.
3. Reasonable selection of fixtures:
(1) Try to use general fixtures to clamp the workpiece and avoid using special fixtures;
(2) The positioning datum of parts coincides to reduce the positioning error.
4. Determine the processing route: the processing route refers to the motion track and direction of the tool relative to the part during the processing of the NC machine tool.
(1) It shall meet the requirements of machining accuracy and surface roughness;
(2) The processing route should be shortened as far as possible to reduce the tool idle travel time.
5. Connection between machining route and machining allowance:
At present, under the condition that the numerical control lathe has not reached universal use, it is generally necessary to arrange the excessive allowance on the blank, especially the allowance containing forged and cast hard skin, to be processed on the ordinary lathe. If it is necessary to process with a numerical control lathe, pay attention to the flexible arrangement of the program.
6. Key points of fixture installation: at present, the connection between the hydraulic chuck and the hydraulic clamping cylinder is realized by the pull rod. First, remove the nut on the hydraulic cylinder with the hand, remove the pull pipe, and pull it out from the rear end of the spindle, and then remove the chuck fixing screw with the hand, and then remove the chuck.

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