The terms jigs and fixtures find a common mention in many of the modern industries. In the machinery world, a jig is primarily referred to as an appliance, is used to mainly guide a cutting tool, while on the other hand, a fixture is something that is simply a device used for holding the work that is going on. These two find a lot of use in the automation industry and as per automotive use, a jig is said to be a device that is for work holding when all the other positions for assembly part or the operation of fabrication are located in advance. A fixture, on the other hand, is a work that is used for holding the device in a way that it must be set by the other operational tools. This is mainly as a part of either the assembly operation or when fabrication takes place.
These are two terms that find prominence in the aerospace and aircraft industry and are synonymously applied to virtually every type of special tools for assembly parts.
In general terms, a jig is a simple tool that has a specific structure and is designed in a way that it can hold on to or create alignment of certain components and/or tools that find use in the manufacturing process that involves either fabrication or assembly. This is mainly done to produce a certain amount of work that is either Interchangeable in the given level of tolerances that is set by the required standards if the manufacturing unit.
The device may have any number of physical characteristics and may either be stationary or portable, adjustable or nonadjustable as per the requirements.
When it comes to jigs and fixtures, one needs to understand that there has to be an ease of removing the component and one should be able to fix a new component. This needs to be given a considerable level of importance.
A jig is a device that is used to support a workpiece and therefore holds the workpiece in place and perfect location with assistance from the locators. It aims to guide the cutting tool so that the operation is performed to the point and at an exact location with the help of reaming and drilling operations.
Jigs usually come fitted with hardened steel bushings the reason being that it helps in the guiding of the cutting tool. Jigs may or may not be fitted to the fastened to the working table. The jigs should be constructed in a way so that the removal and insertion process takes a minimum amount of time.
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