In production, Jig is a device which:

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Question

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ALP CBT 2 Fitter Previous Paper: Held on 23 Jan 2019 Shift 1

Answer 1

Explanation:

Jigs and fixtures are production tools used to accurately manufacture duplicate and interchangeable parts.
Jigs and fixtures are specially designed so that large numbers of components can be machined or assembled identically, and to ensure interchangeability of components.
Jigs and fixtures are made up of Stainless steel, Cast iron, High carbon steel, etc.

Jigs

A jig is a special device which holds, supports, locates and also guides the cutting tool during operation
Jigs are designed to accommodate one or more components at a time
Jigs are available for drilling or boring

Fixtures

A fixture is a production tool that locates and holds the work-piece
It does not guide the cutting tools, but the tools can be positioned before cutting with the help of setting blocks and feeler gauges etc
Fixtures of different types are made for milling, turning, grinding, welding, bending etc

Purpose of Jigs and Fixture:

To reduce the cost of production, as their use eliminates the laying out of work ( marking, punching, positioning, alignments etc.) and setting up of tools
To increase the production
To assure high accuracy of the parts
Increase in interchangeability
Reduce quality control expenses
To reduce the operator’s labour and skill requirement