Question
Download Solution PDFWhich of the following is used to hold and guide a tool in mass production?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
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
Gauge
- Components manufactured using mass production methods are checked only to ensure that the sizes are within the prescribed limits.
- The most economical method of checking such components is by using the gauges.
Important Points
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
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