Tag Archive Requirements of CNC parts processing

Requirements of CNC parts processing

Part material, single piece production. The parts have been machined to size.

Selected equipment: Machining Center

2、 Preparatory work

Finish related preparation work before machining, including process analysis and process route design, tool and fixture selection, programming, etc.

3、 Operation steps and contents

1. Start the machine and manually return each coordinate axis to the origin of the machine tool

2. Tool preparation

According to the processing requirements, select a Φ 20 end mill, a Φ 5 center drill and a Φ 8 twist drill, and then use the spring chuck shank to clamp the Φ 20 end mill. The tool number is set to T01. Use the chuck handle to clamp the Φ 5 center drill and Φ 8 twist drill, and set the tool number to T02 and T03.

3. Put the toolholder with the tool clamped into the tool magazine manually

1) Enter “T01 M06” to execute

2) Manually install the tool T01 onto the spindle

3) Put T02, T03 and T04 into the tool magazine according to the above steps

4. Clean the worktable, install the fixture and workpiece, clean and install the flat jaw vise on the clean workbench, align and level the vise through the 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 cutter, determine the zero offset value of X and Y direction, and set the zero deviation value of X and Y direction

Input to the workpiece coordinate system g54, the zero bias value of Z direction in g54 is 0;

2) the Z axis setter is placed on the upper surface of the workpiece, and the 1 cutter is installed on the upper surface of the workpiece. The spindle is determined by using the tool to determine the zero value of the workpiece coordinate system Z, and the Z to zero offset value is input into the corresponding length compensation code of the machine tool. The “+” and “-” numbers are determined by G43 and G44 in the program. If the length compensation instruction in the program is G43, then the input “-” Z to zero deviation value to the machine tool. Corresponding length compensation code;

3) In the same procedure, input the zero offset value of No.2 and No.3 tools into the corresponding length compensation code of the machine tool.

6. Input processing program

The processing program generated by computer is transferred to the memory of CNC system through data line.

7. Debug processing program

The method of moving the workpiece coordinate system along + Z direction, that is, tool lifting operation, is adopted for debugging.

1) Debug the main program and check whether the 3 tools complete the tool change action according to the process design;

2) Debug three subroutines corresponding to the three tools to check whether the tool action and machining path 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 fast moving rate switch and cutting feed rate switch to low gear, press the NC start key to run the program and start machining. Pay attention to observe the tool path and the remaining moving distance during machining.

9. Take down the workpiece, carry out the inspection, select the vernier caliper for size detection, and conduct quality analysis after detection.

10. Cleaning the processing site

11. Shut down