What is redundant locator?

Location Principles • Redundant Location: A redundant location is said to exist when two locators are attempting to constrain one freedom from two location points. • Redundant locators must be avoided. • The distance between surface A and B would vary according to the process capability.

What is 4 way or 2 way location?

4-way mean you prevent movement at 2 axis (+X, -X, +Y and -Y) on the plane. Generally you have cylindrical pin on the fixture and circular hole at workpiece part. 2-way mean you prevent movement only at 1 axis on the plane. And generally you have cylindrical pin on the fixture and slot hole at workpiece part.

What are the principles of location?

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 the difference between a jig and a fixture?

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.

What are boring jig fixtures?

BORING JIG FIXTURES It is a work holding device that holds, supports and locates the workpiece for a specific operation but does not guide the cutting tool. It provides only a reference surface or a device. What makes a fixture unique is that each one is built to fit a particular part or shape.

What is the best location for a jig or fixture?

If the jig or fixture is to maintain desired repeatability, the workholder must be designed to accommodate the workpiece’s locating surfaces. The ideal locating point on a workpiece is a machined surface. Machined surfaces permit location from a consistent reference point.

Where should loclocators be placed?

Locators should contact the work (preferably machines surface) on a solid and stable point: This permits accurate placement of the part in the tool & ensures the repeatability of the jig and fixture.  They should be placed as far as possible:

What is an assembly jig or fixture?

Jigs and fixtures are production tools used to accurately manufacture duplicate and interchangeable parts. Jigs and fixtures are specially designed so that large numbers of components can be machined or assembled identically, and to ensure interchangeability of components.