cnc machining multi workpiece methods include: drilling, turning and boring, milling, grinding and shaping. No matter the CNC machine tools are large or small, simple or complex, they can be divided into five categories.
Auto parts processing
1. Drilling
Drilling is the process of drilling holes in solid metal using a rotary bit called a fried dough twist drill. CNC lathe used for drilling is called drilling machine. There are also many kinds and specifications of drilling machines. In addition to drilling, the drilling machine can also perform other processing. When drilling, the workpiece is clamped and fixed. The drill bit rotates while drilling into the workpiece.
2. Turning
The general lathe is the most commonly used machine for turning parts. Turning is the removal of metal from a workpiece. When the workpiece rotates, the tool cuts along the workpiece.
Boring is a method of enlarging or further processing holes drilled or cast in metal workpieces. Boring on the lathe is completed by a single edge tool, which rotates while feeding the workpiece.
3. Milling
Milling is the process of turning tools to cut metal. This kind of cutter has multiple cutting edges and is called milling cutter.
Auto Hub Parts Processing
4. Grinding
Grinding is a method of removing metal using a wheel called a grinding wheel. The workpiece is finished by grinding. The workpiece size after grinding is accurate and smooth. When grinding a circular workpiece, the workpiece rotates and feeds the rotating grinding wheel. When grinding a flat workpiece, the workpiece moves back and forth while the grinding wheel rotates. Grinding process is to finish the hard workpiece after heat treatment to achieve accurate size.
5. Shaping CNC processing:
Single blade cutter is used for air gouging, gantry cutting and grooving machine precision plane. When the forming machine is used for processing, the workpiece feeds the cutter and the cutter moves back and forth on the workpiece. When using gantry cutting, the tool cuts or feeds the workpiece, and the workpiece moves back and forth under the tool.
In order to meet the market demand, many CNC machining manufacturers are equipped with huge tool libraries to cover the precision and strength of machined parts. The method of batch cnc machining parts is to select the degree of precision and roughness of parts. What should we pay attention to in CNC small batch processing?
CNC processing of auto parts
1、 Over cut inspection
Over cutting is a frequent problem, which should be paid special attention to. The most important review method is to make the tool path look like a mold, and repeat the inspection in the top view and side view. The tool path without review is not allowed to be machined. In profile milling, if the lower tool position is small, it will also cut too much, which can be avoided by changing the lower tool point.
2、 Die tolerance
The accuracy of parts processed by CNC lathe is very strict. Only when the required accuracy is reached, can the accuracy be used. The main reason to judge the accuracy is its ability to control the size. If the accuracy is within the specified range of tolerance fluctuation, the parts are qualified. If the accuracy exceeds the tolerance, the parts are unqualified.
3、 Fixing CNC machining tools:
Before the cutter head is installed on the machine, its taper fitting position should be wiped clean with a cleaning cloth. The tool length shall be adjusted by the tool tip (in special cases, the tool shall be adjusted in the middle of the tool), and the instructions in the program sheet shall be checked carefully. When the program is interrupted or the tool must be adjusted again, pay attention to whether the depth can be connected with the front. Generally, the line can be raised by 0.1mm first, and then adjusted according to the situation. If water-soluble cutting fluid is used for rotating retractable cutting head, it shall be immersed in lubricating oil for several hours every half month for maintenance.
High precision automobile parts processing
4、 Arrangement of CNC processing sequence:
When arranging the CNC machining sequence, the basic principles must be followed, including "face first, then hole", "rough first, then fine", etc. In addition to these basic principles, the processing should be carried out according to the centralized process of tools to avoid repeated use of the same tool and reduce the number and time of tool change. For the hole system with high coaxiality requirements, the hole system at other coordinate positions shall be processed after the whole processing of the hole system is completed after one positioning, so as to eliminate the error caused by repeated positioning and improve the coaxiality of the hole system. The tool point and tool change point shall be determined. Once determined, they shall not be replaced.