It is a work holding device that holds, supports and locate the work piece and guide the cutting tool a specific operation
Rf is a work holding device that holds, supports and locate the work piece for a specific operation but does not guide the cutting tool.
1) Locators :
For holding the component, the designer should select the proper locators.
Types of locators
a) V – locators
b) Bush locators
c) Pin and button locators
d) Locating pins
e) Diamond pin locators
a) V – locator:
It is a method, generally used to locate circular and semi circular work pieces.
There are two types of v – locators
1] Fixed type
2] Adjustable v - locator
b) Bush locator :
Bush locators are used to hold the work pieces like short, spindle etc.
Material of bush – hardened steel.
Bush locator is mostly used for drilling operation.
2) Clamping devices :
Clamping is require to hold or clamp the job against the force acting on it at the time of machining.
The clamp should hold the job tightly during operation.
The clamp should not damage the job.
Types of clamps :
a) Screw clamp
b) Plate clamp
c) Hinged clamp
d) Swinging clamp
e) Quick action clamp
f) Power clam
a) Screw clamp :
Screw clamp is simplest type of clamp.
Screw clamp is simple in construction and easy to operate.
b) Plate clamp :
Fig shows plate clamp, consist of a simple plate and screw.
The plate can be tighten by using spanner, cams or hand operation.