57) The workpiece is also finished, and the parameters are set in steps. The result is shown in Fig. 28.
Figure 28
4, post processing
Select the CNC machine characteristic file, execute the post-processing program, convert the tool path file (.nci) into NC code file (.nc), and edit the NC program.
5, CNC machine operation
1) Boot
Due to the differences in the structure and numerical control system of various types of CNC machine tools, refer to the machine operating instructions for the specific startup process. Usually follow these steps:
(1) Check if the machine status is normal;
(2) Check if the power supply voltage meets the requirements and the wiring is correct;
(3) Press the "Emergency stop" button;
(4) Power on the machine;
(5) CNC power-on;
(6) Check if the fan motor is running normally;
(7) Check if the indicator on the panel is normal.
2) Mounting the workpiece (blank)
Use the manual method to raise the Z-axis as much as possible, lower the table with the handle, attach the pliers and adjust it, and then fasten the pliers to the workbench. Then mount the workpiece and tighten it, adjust the position of the table according to the machining height, and lock it.
3) Input program
The CNC machining program (.nc) is input into the CNC system. Due to the different CNC systems used, the input methods will be different. Please refer to the CNC system instruction manual.
4) Pair of knives
First, let the tool touch the knife on the left and right sides of the workpiece, so that the tool gradually approaches the workpiece, and put a piece of paper between the workpiece and the tool to twitch. If the paper is not pumped, the distance between the tool and the workpiece is very small, and the manual will be manual. The rate is adjusted to 1μm or 10μm, the tool is moved to the workpiece, and the gap is checked with a feeler gauge until the feeler gauge is not passed, and the X coordinate value at this time is recorded. The obtained left and right X coordinate values ​​are added and divided by 2, and the position at this time is the position of the X axis 0 point, and the Y axis is also the same. The position of the Z-axis is determined by the upper plane of the workpiece being in contact with the tool. In actual production, tools such as a dial gauge and an edge finder are often used for tool setting.
5) Processing
Select the automatic mode, press the cycle start button, and the milling machine performs automatic machining. During the processing, pay attention to the observation of the chip and adjust the feed rate at any time to ensure cutting under the best conditions.
6) Shutdown
After the workpiece is finished, remove the workpiece, clean the machine, and then shut down.
(1) Press the "Emergency Stop" button on the control panel;
(2) Disconnect the CNC power supply;
(3) Disconnect the machine from the power supply.
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