We sometimes encounter some special-shaped workpiece to be processed, the edge of the workpiece is curve, no straight line.
In the first process of numerical control processing, this will not have an impact on our processing, but to the back of the process processing, irregular shape will let us in the workpiece points encountered trouble, so that the processing can not be normal down.
Even sometimes due to temporary process changes, the workpiece that has been processed in the first process may be scrapped, which wastes a lot of resources. Therefore, it is a very important part of the process to have a foresight of the process planning.
For example, in the workpiece machining in the figure above, because the workpiece is surrounded by curves, the only feature that can be used as the origin of the coordinate of the workpiece is the hole.
We want to choose a hole as the origin of the workpiece coordinates, the hole had better be the original existence of the workpiece, so that there will be no additional cost of more processing time; Hole processing is best to use the existing tool, which will reduce the cost of the tool; It is important that the position of the hole be accurate after the first process is completed.
After comprehensive consideration, we chose the hole in the lower right corner of the workpiece as the origin of the coordinate of the workpiece.
After the completion of the first processing procedure, due to the shape of the workpiece, we processed a slightly larger clamp in the soft clamp according to the shape of the workpiece, so as to better hold the workpiece. According to the design of the process, we need to find the center of this hole, which can be used as the origin of our workpiece coordinates.
The diameter of the machining hole and the requirement of position precision are not suitable for the use of edge finder, so we choose the calibration table to find the center of the hole.
The tools above all serve the same purpose — to find the center of the hole.
Although the installation of the calibration meter is different, the basic principle of operation is the same. In the following video, you can learn not only the details of how to do it, but also the good practices that will help you in your work.