The function of each button on the operation panel of the machining center is mainly explained, so that students can master the adjustment of the machining center and the preparation work before machining, as well as the program input and modification methods. Finally, taking a specific part as an example, the basic operation process of machining parts by the machining center is explained, so that students have a clear understanding of the operation of the machining center.
1. Processing requirements Process the parts shown in the figure below. The part material is LY12, single-piece production. The part blank has been processed to size. Selected equipment: V-80 machining center
2. Preparation work
Complete relevant preparation work before machining, including process analysis and process route design, selection of tools and fixtures, program compilation, etc.
3. Operation steps and contents
1. Turn on the machine, and manually return each coordinate axis to the machine tool origin
2. Tool preparation: Select one Φ20 end mill, one Φ5 center drill, and one Φ8 twist drill according to the processing requirements, and then clamp the Φ20 end mill with a spring chuck shank, and set the tool number to T01. Use a drill chuck shank to clamp the Φ5 center drill and Φ8 twist drill, and set the tool number to T02 and T03. Install the tool edge finder on the spring chuck shank, and set the tool number to T04.
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3. Manually put the tool holder with the clamped tool into the tool magazine, that is, 1) enter "T01 M06", execute 2) manually install the T01 tool on the spindle 3) According to the above steps, put T02, T03, and T04 into the tool magazine in turn
4. Clean the workbench, install the fixture and workpiece, clean the flat vise and install it on a clean workbench, align and level the vise with a dial indicator, and then install the workpiece on the vise.
5. Tool setting, determine and input workpiece coordinate system parameters
1) Use the edge finder to set the tool, determine the zero offset values in the X and Y directions, and input the zero offset values in the X and Y directions into the workpiece coordinate system G54. The Z zero offset value in G54 is input as 0;
2) Place the Z-axis setter on the upper surface of the workpiece, call out tool No. 1 from the tool magazine and install it on the spindle, use this tool to determine the Z zero offset value of the workpiece coordinate system, and input the Z zero offset value into the length compensation code corresponding to the machine tool. The "+" and "-" signs are determined by G43 and G44 in the program. If the length compensation instruction in the program is G43, input the Z zero offset value of "-" into the length compensation code corresponding to the machine tool;
3) Use the same steps to input the Z zero offset values of tools No. 2 and No. 3 into the length compensation code corresponding to the machine tool.
6. Input the machining program. The machining program generated by the computer is transmitted to the memory of the machine tool CNC system through the data line.
7. Debugging the machining program. The method of translating the workpiece coordinate system along the +Z direction, that is, lifting the tool, is used for debugging.
1) Debug the main program to check whether the three tools have completed the tool change action according to the process design;
2) Debug the three subprograms corresponding to the three tools respectively to check whether the tool action and machining path are correct.
8. After the automatic machining confirms that the program is correct, restore the Z value of the workpiece coordinate system to the original value, turn the rapid movement rate switch and the cutting feed rate switch to low gear, press the CNC start key to run the program, and start machining. During the machining process, pay attention to the tool trajectory and the remaining moving distance.
9. Remove the workpiece and select the vernier caliper for size detection. After the inspection, perform quality analysis.
10. Clean up the machining site
11. Shut down
Post time: Aug-26-2024
