Process Planning

 Process Planning

When the design engineers have designed the product, the assembly drawings and working

drawings of individual components are made. Now the process planners have to see how the

product can best be made to meet the drawing specifications.

Process Planning:

Process planning can also be defined as the systematic determination of the methods by which a

product is to be manufactured economically and competitively. It consists of devising, selecting

and specifying processes, machine tools and other equipment to convert raw material into

finished and assembled products.

Purpose of process planning:

The purpose of process planning is to determine and describe the best process for each job so

that:

1. Specific requirements are established for which machines, tools, and other equipment can

be designed or purchased.

2. The effort of all engaged in manufacturing are coordinated.

3. A guide is furnished to show the best way to use the existing or proposed facilities.


Procedure of process planning:

To achieve the aim of economic manufacture of the product, process planning is done as follows:

1. The finished product is broken into sub-assemblies and individual components from

manufacturing point of view.

2. Prepare a bill of materials for all components of the product which forms a basis for

purchase of raw materials.

3. Decide which parts are to be manufactured in the plant and which parts are to be

purchased from the market depending upon the facilities available in the plant.

4. Choose the appropriate blank size and select the most economical process to be followed

to manufacture components of the product. This is done by comparing the various

possible methods of obtaining the final product.

5. Decide the sequence of operations to be performed on each component in the process

sheet.

6. Depending upon the accuracies called for by the drawings, determine the machine tools

to do the operations.

7. Determine the need for any special equipment like jigs, fixtures, tools etc.

8. Determine the inspection stages and the instruments required and the need for designing

any inspection devices.

9. Estimate the standard time for performing the job.

10. Determine the type of labour (skilled, semi-skilled or unskilled) required to do the job.












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