Determining The Retraction Route Of CNC Lathe

In the process of CNC lathe processing, the tool moves from the starting point (or tool change point) until it returns to this point and accepts the path passed by the machining program, including the route of cutting processing (processing route) and tool introduction (infeed route) Non-cutting empty strokes such as cutting out (retract route), etc. are called feed routes. In order to improve the processing efficiency, moving from the starting point (or tool change point) to approaching the workpiece position and returning to the starting point (or tool change point) after processing is completed, all are moved in a fast motion mode, the tool retreat route of the CNC lathe processing system In principle, safety must be considered first, that is, no collision with the workpiece can be found in the process of retracting, and secondly, the shortest path of retracting must be considered. Among them, safety is the first principle.

According to the different parts of the parts processed by the CNC lathe, the way to determine the exit route is also different. The CNC lathe processing system provides the following three exit methods.

(1) Slash retraction method

The oblique line retraction method has the shortest route, which is suitable for the partial retraction of the outer surface of the outer circle.

(2) Way of grooving knife withdrawal

This retraction method is that the tool retracts radially and vertically first, and then retracts axially when it reaches the specified position. This retraction method is used when grooving as shown in Figure 2-7.

(3) Retraction method of boring tool

This method of retracting is exactly the opposite of the method of retracting the tool to the bottom of the groove, that is, the tool is retracted axially first, and the tool is retracted in the radial direction when reaching the designated position. This type of retracting method is used for rough boring, and usually first for fine boring. Retract the tool radially, then retract the tool axially to the outside of the hole, then retract the tool diagonally