This document discusses computer aided process planning (CAPP). It outlines the key steps in process planning including drawing interpretation, material and process selection, selecting machines and tools, setting process parameters, quality assurance methods, cost estimating, documentation, and communicating the plan to the shop floor. CAPP aims to reduce errors and improve efficiency over manual planning. The benefits of CAPP include process rationalization, productivity gains, cost reductions, faster response to changes, and incorporating other applications. CAPP systems can be either retrieval-based, recalling plans for similar parts, or generative, creating new plans from scratch.

1. Process planning – Computer Aided Process Planning
(CAPP) – Logical steps in Computer Aided Process
Planning – Aggregate Production Planning and the Master
Production Schedule
Material Requirement planning – Capacity Planning-
Control Systems-Shop Floor Control-Inventory Control
Brief on Manufacturing Resource Planning-II (MRP-II) &
Enterprise Resource Planning (ERP)

2. 
 The design is developed and done by design
department
 To convert the product design into a product, a
manufacturing plan is required
 The activity of developing a such plan is called
process planning
 It consists of set of instructions that describes how to
manufacture the product and its parts
Process Planning

3. 
Role of Process Planning in
CAD/CAM Integration

4. 
 Interpreting part print analysis & symbols
 Gathering the fundamental details of product design
 Selecting the machining process
 Selecting proper machining with allied tooling
 Sequencing the operations
 Inspecting equipment in order to meet quality
 Determining the tolerance, cutting tool, cutting
conditions
 Time study & work study
Responsibility of Process
Planning Engineer

5. 
 Drawing interpretation
 Material Evaluation & Process Selection
 Selection of Machine, Tooling & Work holding
devices
 Setting process parameters
 Selection of Quality Assurance Methods
 Cost Estimating
 Preparing the Process Planning Documentation
 Communicating the Knowledge in shop floor
Process Planning
Activities

6. 

7. 
Here the component drawings should be
analyzed in detail to identify its features,
dimensions, geometric tolerances, surface
finish specifications, the material
specification and the number of parts
required
Drawing interpretation

8. 
 This step is to determine the type of processing
operation that has the capability to generate the
various type of features, given the tolerance
requirements.
 The sequence of operations required to transform the
features , dimensions and tolerances on the part from
a rough(initial) to a finished state is determined.
Material Evaluation &
Process Selection

9. 
 When type of manufacturing has been determined ,
the next step in process planning is to select
appropriate Machine, Tooling & Work holding
devices
 Machine selection requires how the part would be
processed on each of the alternative so that the best
machine can be selected
Selection of Machine, Tooling
& Work holding devices

10. 
 The next step in process planning is to calculate the
specific operation setup time and the cycle times on
each machine.
 Determination of setup time requires knowledge of
available tooling and the sequence of steps necessary
to prepare the machine for processing the given
work piece
Setting process parameters

11. 
 Here the tools and techniques to be used for Quality
Assurance inspection are specified clearly.
 Inspection criteria has to be specified by the process
planner for the critical processing factors (such a s
dimensional and geometric tolerances and surface
finish specifications)
Selection of Quality
Assurance Methods

12. 
 The probable cost of the product before the start of
its manufacture
 With the available cost and time data, the material
cost, labour cost and overheads are estimated.
Cost Estimating

13. 
 The next step in process planning is to document
clearly all the information in detail
 It is generally documented as a job routing or
operation sheet.
 Operation sheet is also called route sheet or
instruction sheet or traveller or planner
Process Planning
Documentation

14. 
 The Major and Final step in process planning is to
communicate the manufacturing knowledge to the
shop floor
 Communication is essential to ensure that the part
will be processed accordingly to the most
economically possible way through process
planning.
Communicate Process
Knowledge

15. 
 In order to overcome the drawbacks of manual
process planning, the computer aided process
planning is used.
 With the use of computers in the process planning,
one can reduce the routine clerical work of
manufacturing engineers.
 Also it provides the opportunity to generate rational,
consistent and optimal plans.
COMPUTER AIDED PROCESS
PLANNING (CAPP)

16. 
 Process rationalization and standardization.
 Productivity improvement
 Product cost reduction
 Elimination of human error
 Reduction in time
 Reduced clerical effort and paper work
 Improved legibility
 Faster response to engineering changes
 Incorporation of other application programs
Benefits of CAPP

17. 
 The two basic approaches of CAPP system are
 Retrieval CAPP system
 Generative CAPP system
Approaches of CAPP

18. 
 The basic idea behind the retrieval CAPP is that
similar parts will have similar process plans.
 In this system, a process plan for a new part is
created by recalling, identifying and retrieving an
existing plan for a similar part, and making the
necessary modifications for the new part.
Retrieval CAPP system