JIGS AND FIXTURES
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Jigs:
A jig's primary purpose is to provide repeatability, accuracy, and interchange ability in the manufacturing of products. A jig is often confused with a fixture; a fixture holds the work in a fixed location. A device that does both functions (holding the work and guiding a tool) is called a jig.
The jig is used for guiding the cutting tools (like a drill bit), and for doing so, jigs have components like a bush, which encounters the cutting tool.
Fixtures:
Fixtures are the work holding device, which holds, supports, and locates the work piece but not guides the cutting tool to perform a specific operation. The main purpose of the fixtures is to hold and locate the work piece.
Advantages of Jigs and fixtures:
• It eliminates the setting time required before machining.
• It increases the machining accuracy and increases production capacity.
• Requires less skilled operation.
• They reduce the production cost.
• Increases machine and labour utilization.
• They simplify the work handling.
• Increases the quality of production in the industry.
• They enable the quick setting of a tool and the proper positioning of the work.
Applications of Jigs and Fixtures:
• Inspection of parts in continuous production in manufacturing industries.
• Mass production of automobile parts.
• For drilling the flanges and drilling holes to any required angles.
• Jigs used for mass drilling, reaming, and tapping.
• Fixtures used for milling, mass turning, and grinding operations.
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