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What problems should be paid attention to in NC lathe fixture

2018/7/10 11:08:50 Viewers:
CNC lathe is a clamping and continuous automatic processing to complete all the turning processes. Therefore, we should pay attention to the following aspects:


1. reasonably choose the cutting amount of numerical control lathe
Whether the selection of cutting amount (AP, F, V) is reasonable is very important for the full use of the potential of the machine tool and the cutting performance of the tool, and the realization of high quality, high yield, low cost and safe operation.
When the car is rough, first consider the choice of a large amount of back knife AP, and then select a larger feed F, and finally determine a suitable cutting speed v. Increasing the amount of AP can reduce the number of cutting tools and increase the feed f to break the chip. Therefore, it is beneficial to select the cutting amount of the rough vehicle according to the above principles to improve the production efficiency, reduce the cutting tool consumption and reduce the processing cost.
When finishing the car, the machining precision and the surface roughness are higher and the machining allowance is small and even. Therefore, when choosing the cutting amount of the fine car, we should pay more attention to how to ensure the processing quality and improve the productivity on this basis. Therefore, the smaller (but not too small) back knife and feed F should be selected, and the cutting tool material with high cutting performance and reasonable geometric parameters should be selected to improve the cutting speed V as much as possible. NC lathe circuit diagram
2. reasonable choice of CNC lathe tool
1) when the rough car is used, the tool with high strength and good durability should be selected so as to meet the requirements of large back cutting and large feed in rough lathe; NC programming for wide number 980 NC lathe
2) when finishing the car, the tool with high accuracy and good durability should be selected to ensure the machining accuracy. ;
3) in order to reduce the tool changing time and facilitate the tool setting, the clamp and blade should be used as far as possible.
3. reasonable choice of CNC lathe fixture
1) try to use universal fixture to clamp workpiece and avoid using special fixture.
2) part positioning datum coincides to reduce positioning error. Full automatic numerical control lathe price
4. determine the machining route of numerical control vehicle
Machining path refers to the movement path and direction of the tool relative to the parts in the numerical control machine tool processing.
1) the processing precision and the surface roughness should be guaranteed.
2) we should shorten the processing route and reduce the idle travel time of cutting tools.
5. connection between processing line and processing allowance
At present, under the condition that numerical control lathes have not reached universal use, the excess amount of blanks, especially the allowance for forging and casting hard layer, should be arranged on the ordinary lathe. If CNC lathe is necessary, attention should be paid to the flexible arrangement of the program.
6. gist of fixture installation
At present, the connection between the hydraulic chuck and the hydraulic clamping oil cylinder is realized by a pull rod. The main points of clamping the hydraulic chuck are as follows: first unload the screw cap on the hydraulic cylinder with the hand, unload the drawing pipe, draw out from the rear end of the main shaft, and then unload the fixed screw of the chuck with the hand, then unload the chuck.