Tianhui Machine Co.,Ltd
We are found in the process of undertaking new product development and trial production. The research and development of new products is usually a process of continuous improvement and constant change. The latter time is often changed locally on the basis of the previous design. For example, just changing the position or size of a hole, moving a boss or a The position of the counterbore. In the machining of CNC machine tools , it is easy to process small holes, but for large holes and bearing holes of ¢40 or more and even more than 100, if there is no corresponding rough boring tool and fine boring tool, it is very troublesome to process. The cost of purchasing tools is very high, and the purchase of tools has greatly extended the time for product development and trial production. In response to this situation, combined with the Beibei horizontal machining center machine (model: MAR-500/630H) we used, we have compiled a simple subroutine, which is very good in the inner hole and step hole machining. The application not only saves tool costs, shortens product trial time and cycle, but also reduces the programming error rate caused by each drawing change.
For example: there is one product (name: bracket, material: ZL101), there are many holes in the processing part, the main dimensions of the figure are simplified as shown in the figure:
There are 5 holes in the picture, there is no pre-cast hole. Our processing method is to pre-drill with ¢27 drill bit, then use ¢36 to lengthen the high-speed steel milling cutter to plunge into ¢36, and by the way ¢36 milling cutter Milling all non-tolerance holes, leaving a tolerance of 0.5mm after tolerance hole milling, and finally milling all tolerance holes with ¢20 tungsten steel milling cutter, without computer programming, three knives finish all holes! The procedure is as follows
......
N1500T11M6 (¢27 drill)
N1505G0 G90 G15H1 X-184.6 Y102.1 (¢58 hole)
N1510S700 M3
N1515G56 H11 Z100.M8
N1520G71Z50
N1525Z5
N1530G81 Z-25 R5 F350M53
N1535X-100.5Y44.5 (¢42 hole)
N1540X0 Y0 (¢60 holes)
N1545X26 Y92 (¢72 hole)
N1550X6Y164.1Z-35 (¢45 holes)
N1555G80M9
N1560G00Z800M5
...... (For details, please refer to Metalworking (Cold Processing), Issue 9, 2013)
Due to design changes, once the position, size, or even depth of the hole is changed, it is only necessary to replace the corresponding coordinate value in the program with the changed coordinates, diameter or depth. The programming is not only simple, but also quick and easy to change, and is not easy to make mistakes. . It is also useful for other CNC systems. The above are some of our small experiences in the production and processing process. We hope that our peers will teach, explore and improve together.
October 14, 2024
September 27, 2024
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