With the rapid development of science and technology and social production, mechanical products have become increasingly complex, and the society has imposed higher and higher requirements on the quality and productivity of mechanical products. Traditional ordinary machine tools are gradually replaced by CNC machines with high precision, high efficiency and high automation.
The widespread use of CNC machine tools and the rapid development of computer-aided design and manufacturing (CAD/CAM) technology have greatly shortened the product manufacturing cycle, improved the product processing quality and market competitiveness, and thus have a wide range of development prospects and significant The economic benefits. In the NC machining, the tool setting is a crucial step. The incorrect operation of the knife will directly affect the machining quality of the part. It may also cause the tool to collide with the CNC machine tool, causing adverse consequences. The methods used in the machining of CNC machining centers are as follows:
1. Trial cutting method The knife setting method is simple, but it will leave marks on the workpiece. The accuracy of the cutting tool is low, and it is suitable for the tool setting when the part is roughed.
2. Dial indicator
The precision of the tool setting of the lever indicator is high, but this method of operation is cumbersome and inefficient. It is suitable for finishing the hole (face) and is not suitable for the rough hole. The tool setting method is: using a magnetic stand to suck the lever indicator in the machining center
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On the shaft, make the meter head near the hole wall (or cylinder surface). When the head rotates one time, the amount of jump of the pointer is within the allowable tool setting error, such as 0.02. At this time, the rotation center of the spindle and the measured hole can be considered. The center coincides. Enter the coordinates of X and Y in the machine coordinate system to G54.
3.Z direction measuring instrument knife
The Z-direction measuring instrument has a high accuracy of the tool setting, especially when multiple tools are set on the machine at the milling machining center, the efficiency of the tool is high and the investment is small, which is suitable for the processing of single parts.