Basic steps of process planning:
- Analysis of part requirements
- Selection of raw work piece
- Determining manufacturing operations and their sequences
- Selection of machine tools
- Selection of tools, work holding devices, and inspection equipment
- Determining machine conditions (cutting speed, feed and depth of cut) and
- Manufacturing times (setup time, lead time, and processing time) etc.
COMPUTER-AIDED PROCESS PLANNING METHOD:
- It can systematically produce accurate and consistent process plans
- It can reduce the cost and lead time of process planning
- Less skilled process planners may be employed
- It increases the productivity of process planners
- Manufacturing cost, manufacturing lead time and work standards can easily be interfaced with the CAPP system.
Process Planning in different environments:
- In tool-room type manufacturing
- “make part as per drawing” is sufficient
- In metal-forming type operations,the process planning requirements are embedded directly into the die.
- Process planning is fairly trivial
- Job-shop type manufacturing requires most detailed process planning
- Design of tools, jigs, fixtures and manufacturing sequence are dictated directly by the process plan.
Requirements for process planner:
- Must be able to analyze and understand part requirements
- Have extensive knowledge of machine tools, cutting tools and their capabilities
- Understand the interactions between the part, manufacturing, quality and cost
Why computer-aided process planning?
- Systematically produce accurate and consistent process plans
- Reduce the cost and lead time of process planning
- Skill requirements of process planners are reduced
- Increased productivity of process planners
- Easily interface with other application programs for further analysis
The detailed explanation of CAPP is shown below in the form of video shown below
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