What is a 3-2-1 principle in GD?

The 3-2-1 principle of location (six point location principle) is used to constrain the movement of workpiece along the three axes XX, YY, and ZZ. This is achieved by providing six locating points, 3 pins in base plate, 2 pins in vertical plane and 1 pin in a plane which is perpendicular to first two planes.

What is redundant location?

A redundant location is said to exist when two locators are attempting to constrain one freedom from two location points. Redundant locators should be avoided. In the case of the workpiece depicted in the figure, we can only locate effectively on surface A or B.

How is a Jig different from a fixture?

Summary: The Major Difference between Jig and Fixture is that Jig is a type of tool used to control the location or motion of another tool. Whereas Fixture is a support or work holding device used to hold work in place. In metal and woodworking, both jigs and fixtures are essential tools used.

What are locating devices or locators?

“Locating Devices” describes the components used to position a workpiece in a workholding device. Locating is a crucial part of effective workholding. Locators come in a wide range of available types with various features. Common locators include pins, buttons, and pads.

Which locator is used in jig?

Vee Locators This is used for locating the circular and semi-circular type of workpieces as shown in Figure 4.8. The main part of locating device is Vee shaped block which is normally fixed to the jig. This locator can be of two types fixed Vee locator and adjustable Vee locator.

Which jig is used for location from a bore?

Explanation: Post jigs are used for location from a bore.

What is a jig and fixture?

The jig and fixture are tools used for holding the work piece in a correct location for mass production. Various types of fixtures (like drilling fixtures, milling fixtures, and welding fixtures) are used in industry. The 3-2-1 method is the fundamental principle for all types of fixture design.

What is the 3-2-1 method of fixture design?

The 3-2-1 method is the fundamental principle for all types of fixture design.

What are the different types of fixtures?

Various types of fixtures (like drilling fixtures, milling fixtures, and welding fixtures) are used in industry. The 3-2-1 method is the fundamental principle for all types of fixture design.

What is a fixture on a drill?

In short, the fixture is a tool that ensures correct and quick clamping (or loading) of the work piece with respect to the machine tool. For example, you have a drill machine and want to make a 10mm diameter hole at the point of intersection of the two diagonals of a square plate. The hole should be inclined at 45 degree angle with the surface.

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