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CNC machining centers are crucial in the machining process, and it is important to avoid collisions when programming and operating. This is because CNC machining centers are very expensive, costing tens to hundreds of thousands of yuan, and maintenance is difficult and costly. Deed Machine is a CNC machining industry manufacturer, Our 5 axis gantry machining center and CNC gantry type machining center can be applied for CNC machining aerospace parts, CNC die making and CNC machine automotive parts. However, collisions can be avoided due to certain rules that can be summarized as follows:
With the development of computer technology and the expansion of CNC machining teaching, there are more and more CNC machining simulation systems that are becoming increasingly sophisticated. These can be used to initially check the program and observe the motion of the tool to determine if a collision is possible.
Most advanced CNC processing centers have graphic display functions. After entering the program, the graphic simulation display function can be called up to observe the detailed motion of the tool, so as to check if a collision is possible between the tool and the workpiece or fixture.
The dry run function of CNC machining centers can check the correct path of cutting. After entering the program into the CNC processing center, the tool or workpiece can be installed and the dry run button pressed. This will cause the main spindle to not turn while the worktable runs automatically along the programmed path, allowing any possible collision between the tool and the workpiece or fixture to be detected.
However, when installing a workpiece, no tool should be installed, and when installing a tool, no workpiece should be installed, otherwise a collision may occur.
Most CNC machining centers have lock functions (full lock or single-axis lock). After inputting the program, the Z-axis can be locked, and the coordinate value of the Z-axis can be used to determine if a collision will occur. This function should avoid operations such as tool changes, otherwise the program cannot continue.
When starting a CNC machining center, you must set the reference point of the CNC machining center. The working coordinate system of the CNC machining center should be consistent with the programming, especially the Z-axis direction. If there is an error, there is a high possibility of collision between the milling cutter and the workpiece.
In addition, the tool length compensation setting must be correct, otherwise there will be either empty machining or collisions.
Programming is a crucial part of CNC machining, and improving programming skills can largely avoid unnecessary collisions.
For example, when milling the inside of a workpiece, after the milling is completed, the milling cutter needs to quickly retract 100mm above the workpiece. If programmed as N50 G00 X0 Y0 Z100, this will cause three-axis linkage of the CNC processing center, and the milling cutter may collide with the workpiece, resulting in damage to the tool and the workpiece, seriously affecting the accuracy of the CNC machining center. Instead, the following two lines of code can be used: N40 G00 Z100; N50 X0 Y0;, that is, the tool first retracts to 100mm above the workpiece, and then returns to the programming zero point, thus avoiding collisions.
In summary, mastering the programming skills of a CNC machining center can improve machining efficiency, quality, and avoid unnecessary errors. This requires us to constantly summarize experience and improve constantly in practice, thereby further enhancing programming and machining capabilities.
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