Question

The complexity of a jig or a fixture is determined by

1. the number of pieces that must be produced

2. the degree of accuracy required

3. the number and kind of machining operations that must be performed

Which of the above are correct?
1. 1 and 2 only
2. 1 and 3 only
3. 2 and 3 only
4. 1, 2 and 3

Answer 1

Correct Answer - Option 4 : 1, 2 and 3

Jigs and fixtures are manufacturing equipment which makes hand or machine work easier.

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.

 

The factors influencing the design factors of jigs and fixtures are

• Overall size and shape of the part
• Type and condition of the material used for the part
• Type of machining operation to be performed
• Degree of accuracy
• Number of pieces to be made
• Locating and clamping surfaces