Syphon

Syphon is a long bent pipe which is used to transfer liquid from a reservoir at a higher elevation to another reservoir at a lower level when the two reservoir are seperated by a hill or a high level ground as shown in figure.

The point c is at the highest of the syphon is called the summit.As the point C is above the free surface of the water in the tank A, the pressure at C will be less than atmospheric pressure.Syphon is used in the following cases

1. to carry water from one reservoir to another reservoir seperated by a hill or ridge.
2. to take out the liquid from tank which is not having any outlet.
3. to empty a channel not provided with any outlet sluice.

Methods for finding different Part family

1.Visual Inspection
It is the least sphosticated and least expensive method. It involves classification of parts into family by looking either the physical parts or photograghs and arranging them into similar group.
2.Production flow analysis (PFA)
It is a method of identifying part family and associated machine tool grouping by analysing the route sheet (process planning) for parts produced in a given machine shop. It groups together the parts that have similar operation sequence and machine routings. The disadvantages is it blindly accept the excisting route sheet without considering whether they are logical or consistent.
3.Parts Classification and Coding
We are considering both the design and manufacturing attitudes of each Parts.
Design Attitudes:-basic internal shape and external shape,Length of dia. ratio,material type,tolerance
Manufacturing Attitudes:-major process,minor process,batch size,machine tool used,surface finish

Part Family -Definition

It is a collection of parts which are similar either because of design attitude or manufaturing attitudes. The parts within the family are different but their similarities areclose enough to put them under the same part family.

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