Turret punching is a CNC process that uses a turret punch machine to punch holes in sheet metal or plastic materials according to a programmed design. The material is clamped into the machine table which then moves it to the correct X/Y location for the turret-selected punch to create the desired hole shape. Turret punching is a cold working process that produces shapes in sheet metal through selective material removal. It is a fast and accurate process for making multiple holes in metal sheets.

1. TURRET PUNCHING

2. Turret Punching
 is a process, where work piece are punched to
make a desired hole of a metal sheet.
 it is a CNC machine used for performing
punching (a turret puncher) to a material such
us sheet of metal or plastic .
 Turret punching is a cold work process. This
entails that material properties remain
unchanged as they are not exposed to thermal
impact during machining.

3. Process
The Turret Punching process produces shapes
by selectively removing material from sheet
metals. These sheets are clamped into the
machine on a table that is programmed to
move to a specific X/Y location within the
matrix of the machine. The correct punch
shape and size is selected at the turret and the
machine actuates the punch to produce the
desired hole.

4. Process Preview
Raw Desired Into the machine
material/s design
Finished
Start of the punch
Products
process

5. Punching characteristics
 Punching is the most cost effective process of
making holes in strip or sheet metal for
average to high fabrication
 It is able to create multiple shaped holes
 Creates a burnished region roll-over, and die
break on sidewall of the resulting hole

6. Materials supported
Sheet Metals including:
 Aluminum
 Galvanized Steel
 Carbon Steel
 Stainless Steel
 Brass
 Bronze
 Copper
 Monel
 Plastic

7. Advantage/s
 Fast and accurate over and over again without
variation.
 Take a less time of work than the manual
punching machine.
 CNC punching machines commonly handle up
to 1200 hits per minute and many have
automated loading systems allowing for
continuous operation.
 All kinds of metal can be turret punched, also
hard stainless spring steel and some polymere
types can be turret punched.

8. Disadvantage/s
 A turret punching machine is an expensive
machine
 It cannot punch a metal with a thickness of
6mm.
 Occupies large space in the work area.
 Warping may occur if many holes are punched
or much material is removed from the sheet

9. Application