Determine the overall processing plan of precision Vmc Cnc 11
Analyze the structure of the part, find out the key parts, key dimensions, etc. of the part, start with the processing analysis of the main part of the part, draw up the processing process of the part, and then intersperse the processing content of other parts in it, and initially draw up the process route of the part, and then Organize and modify, form an overall plan for parts processing, and sort out the parts processing process card.
Machining center processing plan
1. Precautions for the precision machining center to draw up the overall plan of parts processing
When drawing up the process route, especially when selecting the processing method and arranging the processing sequence, the following matters should be paid attention to:
1. Surface forming
First, the datum plane that the machining center can accurately position, and then try to position and process the remaining surfaces with a uniform precision datum, and consider various
The process method is most suitable for the surface structure to be processed.
2. Guarantee quality
The following aspects should be considered to ensure quality.
1) Ensure that the dimensional accuracy, shape accuracy and surface mutual position accuracy meet the design requirements.
2) Divide the processing stages and separate rough machining and finishing.
3) Ensure that the workpiece has no pinching deformation.
4) Reduce thermal deformation.
5) Use heat treatment process to improve processing conditions, eliminate stress and stabilize size.
6) Reduce errors.
7) For some surfaces that require extreme mutual position accuracy, use each other as a basis for repeated processing.
3. Reduce consumption and reduce costs
Give full play to the advantages and potential of the factory, make full use of the existing production conditions and equipment, try to shorten the process route and process preparation time, and try to avoid the use and consumption of precious and scarce materials.
4. Increase productivity
When considering the intelligent technology on the basis of the existing CNC machining center equipment, the process content should be concentrated to improve production efficiency and ensure quality. The circulation of workpieces in and between workshops should be minimized, and advanced and efficient process technology should be considered when necessary.
5. Select CNC machine tools and process equipment
When selecting machine tools and process equipment, the model, specifications, and accuracy of the CNC machine tools should be compatible with the overall size of the parts, the accuracy requirements, the production guidelines and the specific conditions of the factory. Avoid unnecessary waste of equipment and tooling and technical limitations of operators due to greed for high, precise, and cutting-edge requirements.
6. Comparison and optimization of processing technology schemes
The design of parts processing technology should usually be based on the tenet of "high quality, high yield, and low consumption". In order to ensure the reliability of processing quality, technical and economic analysis of different parts processing plans should be carried out, productivity and economy (that is, the process cost and investment payback period of different plans) should be compared, and the results should be comprehensively compared to determine the optimal processing plan.
When formulating process regulations, there are usually several different process routes that can meet the requirements of the machining accuracy and surface quality of the processed parts. Some of them have high productivity, but the investment in equipment and process equipment is large; others are The investment may be more economical, but the production efficiency is lower. Therefore, different process routes will have different economic effects.
In order to select the most economical and reasonable plan under given production conditions, technical and economic analysis and evaluation should be carried out on at least two process routes that have been drawn up, and the ones with strong feasibility, good economy, short process routes, convenient operation and easy realization should be determined. Parts processing plan. Highlight the rationality of manufacturing process, technological advancement and comprehensive economy and high efficiency.
Second, the verification of the process plan of the precision machining center
After completing the various steps of the process of formulating the vertical machining center processing technology (vertical machining center use case), the entire process should be comprehensively reviewed and checked.
First of all, the correctness and rationality of the processing route of the parts should be reviewed according to the requirements of various processing content, for example, whether the selection of benchmarks minimizes the accumulated error, whether the selection of processing methods is convenient and feasible, whether the processing parameters such as machining allowance and cutting amount are reasonable , Process drawings and other charts are complete and accurate.
In addition, it is necessary to review whether the process documents comply with the basic provisions of the relevant standards.
After the review of the process plan of the precision machining center is completed, the overall processing plan of the part is generally expressed in the form of a part processing process card.
