Rough machining, semi finishing, finishing of all parts of the processing process, so we must carry out a thorough process analysis, arrange a reasonable processing sequence, select the appropriate cutting tools and cutting parameters, in order to ensure the machining accuracy of parts and improve production efficiency.
Arrange tool position number reasonably. The machining center needs to use a variety of tools, sometimes the shape of the tool is very different, so it is necessary to leave enough space for tool change to avoid tool collision.
In order to improve the work efficiency of high-speed Gong machining, the tool is usually pre adjusted outside the machine tool after it is installed on the tool holder, and the tool parameters are input into the corresponding address of the tool table.
For the convenience of debugging program and adjusting work steps, different working steps can be programmed into subprograms, and the main program mainly carries out tool changing and subroutine calling.
Because there are many steps in high-speed Gong machining, and tool change is required many times, so the error rate of manual programming is high. Therefore, it is necessary to check the program carefully and verify it by trial operation. During calibration, it is better to check the tool path at each plane position. If the main plane is XY plane, elastic pen or water pen can be clamped on the main shaft to draw the running track in trial operation mode. The programming features of the program are that the shape of the workpiece processed by small machining center is complex, and there are many kinds of cutting tools used. The whole process from rough machining, semi finishing to finishing must be completed after one clamping. Therefore, the program is more complex. The following problems should be considered in programming.
- Analyze the drawings carefully to determine the reasonable process route.
- The size and specification of the tool should be selected, and the actual size measured should be filled into the tool card.
- Determine the reasonable cutting parameters. It mainly includes spindle speed, back feed rate and so on.
- Sufficient space for automatic tool change shall be reserved to avoid collision with workpiece or fixture. It is suggested that the tool change position should be set at the origin of the machine tool.
- In order to check and debug the program, the processing contents of each step can be arranged into different subprograms, and the main program mainly completes tool change and subroutine call. This procedure is simple and clear.
- Check and test run the compiled program, and pay attention to whether there is interference between the tool, fixture or workpiece. When checking the m, s and t functions, it can be carried out in the z-axis locking state. Processing programming need to pay attention to the first, do not modify the setting of machine parameters. 2、 Do not change the file format of the computer. 3、 Note that micro connections are added and checked before each incoming. 4、 Remove stamping after the body, if you need to add stamping should focus on inspection, and stamping. 5、 Program file cannot exceed 2, program cannot run. 6、 Stamping sequence from inside to outside, if there is an accurate stamping part will be preferred. 7、 Each width is less than 140 mm or stamping position is less than 40 mm. The length less than 300 mm cannot be punched. (Note: for composite die, except the influence of position, the cutting angle is less than 30 mm, and the clamp should be moved to a reasonable position. When the cutting angle is less than 30 mm or in effect, the distance of clamping position, the reasonable position of 150 mm to 250 mm and the cutting angle clamp on the computer must be the same as the actual position). The digital control system can control the machine tool to automatically select and change the cutting tool according to different working procedures, and automatically change the spindle speed, feed rate, the motion track of the cutter relative to the workpiece and other auxiliary functions. The machining center can complete the processing of multiple processes on several surfaces of the workpiece in turn. In addition, it has a variety of tool changing or selecting functions, which greatly improves the production efficiency. Due to the centralization of working procedure and automatic tool change, the time of clamping, measuring and adjusting of machine tool is reduced, so that the cutting time of machine tool reaches about 80% of the starting time of machine tool (only 15-20% for ordinary machine tools); meanwhile, the time of turnover, handling and storage of workpieces between working procedures is reduced, and the production cycle is shortened, which has obvious economic effect
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