Turning is a method of cutting a workpiece on a lathe using a workpiece relative to the tool rotation. Turning is one of the most widely used in the machine building industry and plays an important role in production. The application of numerical control technology makes turning machining more efficient and applicable, and the choice of feed route plays an important role in the processing quality of CNC turning.
reader:
How do we determine the feed route when CNC turning is used for roughing and finishing?
Xiaobian:
The feed route is the trajectory of the tool relative to the workpiece during the entire machining process. It not only includes the contents of the work step, but also reflects the order of the work steps. The feed route is also one of the basis for programming.
1. CNC turning roughing feed route adopts CNC turning technology for rough machining of workpieces. Common feed routes mainly include “rectangular†circulation feed route, cycle feed route along contour shape equidistance line, step cutting route and two-way There are several options for cutting the feed route.
1. The “rectangular†cyclic feed route is designed using the rectangular cycle function in the numerical control system.
2. The cycle feed route along the contour shape equidistance line is a closed compound cycle function in the numerical control system, which controls the turning path of the turning tool along the contour of the workpiece to make an equidistant line cycle.
3. The bidirectional cutting feed route is based on the characteristics of the CNC lathe, along the contour of the blank of the part, using the feeding path of the simultaneous feeding method in both the horizontal and radial directions.
Second, the CNC turning precision machining feed route uses CNC turning technology to finish the workpiece. The commonly used feed route mainly includes the feed route of the part forming profile, the feed route that needs to be changed during machining, and the processing according to each processing surface. For the accuracy planning of the feed route, in addition, during the cutting process, also pay attention to the tool cutting, cutting out and the position selection of the cutting point.
1. When designing the feed route of the contour profile of the part, try not to arrange the cutting, cutting, tool changing and pause in the continuous contour trajectory, so as to avoid the elastic deformation and surface scratching of the workpiece.
2. If the tool change must be carried out during the machining process of the workpiece, the design of the feed route mainly determines the sequence of the machining tools according to the requirements of the work step sequence, and how is the machining path between the machining tools? Connected.
3. The accuracy requirements of each surface of the workpiece are also related to the design of the feed route. If the accuracy requirements of each part of the part are not much different, the highest surface accuracy shall be taken as the standard, and all the machining parts of the part shall be completed by one continuous machining. If the accuracy requirements of the machining parts of the parts are quite different, the machining surface with the precision should be arranged within the same path of the turning tool to complete the cutting of the machining part.
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Label: How do you determine the feed route when CNC turning?
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