It mainly explains the functions of each button on the machining center control panel, allowing students to master machining center adjustment, preparations before machining, and program input and modification methods. Finally, a specific workpiece is taken as an example to explain the basic operation process of workpiece machining, so that students have a clear understanding of the operation of the machining center.
1. Processing requirements
Process the parts as shown in the image below. The material of the parts is LY12 and is produced in one piece. The blank of the part is machined to measure.
Selected equipment: V-80 machining center
2. Preparation work
Carry out relevant preparation work before processing, including process analysis and process route design, tool and accessory selection, programming, etc.
3. Operation steps and contents
1. Turn on the machine and manually return each coordinate axis to the origin of the machine tool.
2. Preparation of tools
According to the processing requirements, select Φ20 end mill, Φ5 center drill and Φ8 twist drill. Then use the spring chuck tool holder to clamp the Φ20 end mill. Set the tool number to T01 and use the drill chuck tool holder. Tighten the central drill bit Φ5. For Φ8 drills and twist drills, the tool numbers are set to T02 and T03. The tool edge detector is installed on the collet holder, and the tool number is set to T04.
3. Manually place the clamped tool holder into the tool magazine, i.e.
1) Enter “T01 M06” and execute
2) Manually install tool T01 onto the spindle
3) Follow the steps above to successively place T02, T03 and T04 in the tool magazine.
4. Clean the workbench and install accessories and workpieces
Clean the flat vise and install it on a clean workbench. Use a dial indicator to align and level the vise, then install the workpiece on the vise.
5. Calibrate the tool, determine and enter the workpiece coordinate system parameters.
1) Use an edge finder to calibrate the tool, determine the zero offset values in the X and Y directions, and set the zero offset values in the X and Y directions.
Enter it into the G54 part coordinate system and the zero offset value in the Z direction in G54 is entered as 0;
2) Place the Z axis adjuster on the top surface of the workpiece, remove tool No. 1 from the tool magazine and install it on the spindle. Use this tool to determine the zero offset value in the Z direction of the part coordinate system. and enter the zero offset value in the Z direction. In the length compensation code corresponding to the machine tool, the numbers “+” and “-” are determined by G43 and G44 in the program if the compensation command length in the program is G43. , enter the zero offset value in the Z direction of “-” in the corresponding length compensation code of the machine tool into the length compensation code;
3) Use the same steps to enter the zero offset values in the Z direction of tools #2 and #3 into the corresponding length compensation code of the machine tool.
6. Enter the treatment program
The processing program generated by the computer is transmitted to the memory of the CNC system of the machine tool through the data line.
7. Debugging the processing program
The debugging method is carried out by moving the workpiece coordinate system in the +Z direction, that is, lifting the tool.
1) Debug the main program and check whether the three tools have completed the tool change action according to the process design;
2) Debug the three subroutines corresponding to the three tools respectively, and check whether the tool movements and processing paths are correct.
8. Automatic processing
After confirming that the program is correct, restore the Z value of the workpiece coordinate system to the original value, set the rapid movement priority switch and cutting feed priority switch to low, press the CNC start key to run the program and start processing. Pay attention to the tool path and remaining movement distance during machining.
9. Remove the part and perform an inspection
Select a caliper for dimensional inspection and perform quality analysis after inspection.
10. Clean the treatment site
11. Stop
Daguang focuses on providing solutions such as precision CNC machining services (3-axis, 4-axis, 5-axis machining), CNC milling, 3D printing and rapid prototyping services.
