Lathe Operations: Facing

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Facing Operations Facing is the process of removing metal from the end of a workpiece to produce a flat surface. Most often, the workpiece is cylindrical, but using a 4-jaw chuck you can face rectangular or odd-shaped work to form cubes and other non-cylindrical shapes.

When a lathe cutting tool removes metal it applies considerable tangential (i.e. lateral or sideways) force to the workpiece. To safely perform a facing operation the end of the workpiece must be positioned close to the jaws of the chuck. The workpiece should not extend more than 2-3 times its diameter from the chuck jaws unless a steady rest is used to support the free end. Cutting Speeds

If you read many books on machining you will find a lot of information about the correct cutting speed for the movement of the cutting tool in relation to the workpiece. You must consider the rotational speed of the workpiece and the movement of the tool relative to the workpiece. Basically, the softer the metal the faster the cutting. D…

What are the Main Parts of a Broaching Machine?

Ram - It is actuated by the piston in the cylinder of the hydraulic drive. It moves to and fro during the operation. In case of pulling type of broaching machine the ram pulls the broach with the required pressure for cutting stroke and goes inside the ram head.  

Hydraulic Drive - It is housed in the base and powered by electric motor. This provides the required pressure for pulling or pushing the broach.

Bed - Bed is the robust casting on which the main units are mounted. The construction of bed is such so that it can bear the load/pressure exerted during the operation.

Pulling Slide - It supports the front end of ram.

Puller Head - It secures the pull end of the broach.

Platen - It supports the work piece against the cutting force while broaching operation is carried out.

Broach - A broach is a multiple-edged tool that has successively higher cutting edges along the length of the tool.

Follower Rest - It supports the rear end of the broach

Main Parts of a Broaching Machine

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