Solutions to safety problems of machining centers

CNC machining center is a kind of CNC machining machine with more functions. It concentrates the functions of milling, boring, drilling, tapping and cutting threads on a single device, so that it has a variety of technological means. The machining center is equipped with a tool magazine, which stores different numbers of various tools or inspection tools, which are automatically selected and replaced by the program during the processing. This is the main difference between it and CNC milling machine and CNC boring machine. Especially for workpieces that must use tooling and special equipment to ensure product quality and efficiency. This will save a lot of time and cost for the development and remodeling of new products, so that the company has strong competitiveness.

The following problems may occur during the use of CNC machining centers

1. When writing programs, programmers and operators must be careful with the decimal point. Although the zero after the decimal point of the value is ignored when the system is executed.

2. The origin of the workpiece coordinate system set by the programmer during programming should be outside the workpiece blank, at least on the surface of the workpiece.

3. When adjusting the tool length offset, the operator should ensure that the offset value is negative.

4. When adjusting the workpiece coordinate system, the operator should set the datum point outside the physical (geometric) length of the multi-tool, at least at the position of the longest tool.

On a milling machine, the reference point of the X and Y axes is on the spindle axis. However, the reference point of the Z axis can be set at the spindle end or at a point other than the spindle end. If it is at the spindle end, when the command is zero, the spindle end will reach the zero position specified by the coordinate system. At this time, the face key on the spindle end will collide with the workpiece: if there is a tool on the spindle, it must collide with the workpiece. To ensure that there is no collision, the reference point on the Z axis should be set outside of all tool lengths. Even if no other movement is added, the reference point will not hit the workpiece.

On a lathe, the datum point can be set at the center of rotation of the tool post, the tip of the datum tool or other positions. If no additional movement is added, the zero commanded by the programmer is the reference point of the tool post (machine tool) moving to the programmed zero position. At this time, if the reference point is set at the rotation center of the tool post, the tool post must collide with the workpiece. To ensure that there is no collision, the reference point on the machine tool should not only be set outside the tool post, but also outside all the tools. In this way, even if the tool holder is equipped with a tool, the reference point will not collide with the workpiece.