6. PROCESS PLANNING ACTIVITIES:
1. Drawing interpretation:
• Analyse finished part in engineering design.component
finish,material specification,part required).
2. Material evaluation and process selection:
tivity,cost).Evaluate the materials, (features,dimensions,geometric
tolerances transform rough state to finished state).Process
evolution(rough to finished).Part evolution(final state to initial state).
7. 3. Selection of m/c,tooling,workholding devices:
• Economic considerations,production rate per unit cost,durability and
dependability,lower process rejection,minimum setup times,long life
of m/c,functional versatility.best m/c,make or buy,BEA .
4. Selecting process parameters:
• Machines selected,calculating operation setup time and cycle
time,tooling sequence,equipment capability,shop practice.
• Calculation of part processing time requires determination of
sequence of processing steps on each m/c as outplanning.
• Part loading,unloading,m/c indexing for 1 cycle.
• M/c cycle time allowances added to standard cycle time.Calculate
cycle time & m/c rates to find out cost.
8. 5. Selecting quality assurance methods:
• Inspection criterias(dimensional,geometric,surface finish),tools and
6. Cost estimating:
• Process of determining the probable cost of product before
• Material,labour,overhead costs-profit.
• Material,mfg processes,batch size,make or buy.
9. 7. Process planning documentation:
• Document clearly all the detail information.
• Documented as job routing or operating sheet.
• Production operations&associated m/c tools for component and
• Route sheet information as
part identification,processing,operation of m/c,std times,setup cycle
times,tooling requirements,production control information shows
planning lead time operation.
• Reasons: part process-design,job quote,cost estimate,std cost
8. Communicate process knowledge:
• Mfg to shop floor,economy,consistent quality.
18. Selection of Process planning system
Major factors to be considered while selecting the
best process planning system are:
i. General Environment
ii. Organisational Structure
iii. Technical Expertise
iv. Needs and Objectives of the company
20. The following information can be obtained from the
interpretation of an engineering drawing:
i. Material of the product
ii. Number of parts to be produced
iii. Weight of the component
iv. Dimensions of the parts
v. Dimensional and geometric tolerances
vi. Size and Accuracy
36. Shape or Geometry Consideration
Some of the important shape or Geometry considerations are:
• Relative size
• Dimensional Tolerance
• Surface Finish
• Design for Assembly
• Design for Manufacturability
38. Material Property Requirements
i. Mechanical Properties
ii. Physical Properties
iii. Service Environment
• Standard Components
• Ease of Manufacture
• Quantity and rate of components
• Minimum and Maximum
• Level of Quality
• QA and Inspection Requirements
• Ease of Assembly