Page 43 - CITS - Fitter - Trade Theory

FITTER - CITS

2 For plate, block material workpiece.
Surface grinding machines that grind the flat surfaces of plate or block materials often use a magnetic chuck
that uses electromagnets or permanent magnets to lock the workpiece in place.
Magnetic chucks can firmly fix workpieces made of iron, nickel, or other ferromagnetic materials that easily
stick to magnets.To hold workpieces that do not stick to magnets, such as aluminum, a vacuum chuck is used,
which uses vacuum force to grab the workpiece.
Bench vice: It is work holding device , to hold work piece then applied other operations as like filing, hack-
sawing, tapping reaming etc.
Machine vice:: It is very important vice of machine shop hold the work than apply machining process, as like
milling, shaping, slotting drilling etc.

Angle plate: It is working support device, we are usefor marking , than support to work piece JIG: it is a device ,
it is hold the. work piece and guide the tool.

Jig: It is a device , it is hold the. work piece and guide the tool.
Fixture: It is device ,it is used for only hold the job , it is not guide the tool.

Clamps and bolts
Drilling machine tables are provided with T-slots for fitting bolt heads. Using clamps and bolts, the work pieces
can be held very rigidly.

While using this method, the packing should be, as far as possible, of the same height as the work, and the
bolt nearer to the work. There are many types of clamps and it is necessary to determine the clamping method
according to the work.

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CITS : CG & M - Fitter - Lesson 4