The process of CNC machining parts involves several steps, which ensure the efficiency and accuracy of the machining. The following is a detailed process of CNC machining parts:
First, preparation
1. Analysis pattern:
Analyze the technical requirements of the parts to be processed, select and determine the content of the parts for CNC machining and CNC machining machine.
2. Process analysis:
According to the characteristics of the machined surface and the function of the CNC equipment, the numerical control machining process of the parts is analyzed, and the numerical control machining process design is carried out.
Second, machine tool and workpiece preparation
1. Machine tool preparation:
Start the machine, manually return to the reference point, establish the machine coordinate system.
2. Workpiece preparation:
According to the processing requirements of the parts, select a reasonable positioning basis, and select the appropriate fixture according to the batch, accuracy and processing cost of the parts, to complete the workpiece clamping and alignment.
Third, programming and input
1. Programming:
According to the machining requirements of the parts, the graphics of the parts are processed and calculated mathematically, and the machining program is written.
The specific steps of NC programming include:
Analyze the drawing of the parts, determine the geometric shape, size, accuracy and other requirements of the parts.
Determine the process, including machining route, cutting parameters and other process parameters.
Perform numerical calculations to obtain the data required for programming.
Write the program list, and gradually write the machining process into the code that the CNC system can recognize.
2. Program input:
The written program is input into the numerical control system through the input device. At present, the main input methods are floppy drive, USB interface, RS232C interface, MDI manual input, distributed digital control (DNC) interface, network interface and so on.
Fourth, tool preparation
1. Tool selection:
According to the processing technology and structural technology of the parts, choose the appropriate tool material and tool type.
2. Tool installation and tool matching:
Complete the tool installation and tool alignment, and set the parameters of the tool alignment correctly in the numerical control system.
Fifth, the processing process
1. Program verification:
Check the program on the numerical control system to ensure that the program is correct.
2. Trial run:
Test run the program in the automatic mode to check whether the motion path of the machine tool and the tool meet the requirements.
3. Formal processing:
After the procedure is correct, the formal machining of the parts begins. In the process of machining, the CNC system issues the corresponding control instructions according to the program, and drives the machine tool according to the predetermined trajectory to complete the cutting of the parts.
Sixth, follow-up treatment
1. First inspection:
The first part is inspected to ensure that the machining accuracy and quality meet the requirements.
2. Mass production:
If the first piece passes the inspection, mass production can be carried out.
3. Preparation of technical documents:
Prepare NC machining technical documents, such as NC machining process card, program description card, cutting road map, etc., for subsequent processing and quality control.
To sum up, the process of CNC machining parts is a complex and fine system engineering, which requires the cooperation of programmers, operators and quality inspectors to ensure the smooth progress of the processing process and the high standard of processing quality.
