SHEET METAL FORMING PROCESS PRESS WORKING OF SHEET

SHEET METAL FORMING PROCESS / PRESS WORKING OF SHEET METALS Press working also termed as Cold stamping.

• Presses – In sheet metal working it is a machine tool with a bed (die) and powered ram (punch) that can be driven toward and away from the frame to perform various cutting and forming operations

PRESS OPERATIONS Cutting operations • Blanking • Punching ( Piercing) • Notching • Perforating • Shaving • Trimming • • Slitting Lancing Nibbling Forming operations Bending Drawing Squeezing

BLANKING • It is the operation of cutting a flat shape from the sheet metal in single step Punching / Piercing • It is the operations by which holes are produced

Notching – It is a cutting operation by which metal pieces are cut from the edges Perforating – It is the operation by which multiple small holes are cut in a sheet metal Slitting – It is the operation of making incomplete hole Lancing –It is the operation in which the hole is partially cut and then one side is bent down to form a sort of tab or louvers

Lancing

Trimming – It’s a operation of cutting unwanted excess material. Shaving The uneven surfaces along the edges are removed by this operation

• Dies – Types • • Simple- single operation with a single stroke Compound- two operations with a single stroke Combination- two operations (cutting & forming) Progressive- two or more operations at two or more stations with each press stroke, creates what is called a strip development • Transfer dies • Multiple or gang die

Progressive Dies