Press Tools

1. ction ro
BY
PRABHAKAR .P

2. P RESS T OOLS & 0

3. INTRODUCTION :
The word tooling refers to the hardware necessary to
produce a particular product. The most common classification
of tooling are as follows :
1. Sheet metal press workingtools.
2. Molds and tools for plastic molding and die casting.
3. Forgingtools for hot and cold forging.
4. Jigs and fixtures for guiding the tool and holding the work piece.
5. Gauges and measuring instruments.
6. Cuttingtools such as drills, reamers, milling cutters broaches,taps, etc.

4. PRESS TOOLS
Presstools are specialtools custom built to produce a component
mainly out of sheet metal. Press tool is of stampings include cutting
operations like(shearing, blanking, piercing,etc.) and forming operations
(bending,drawing, etc.)
Sheet metal items such as automobile parts (roofs, fenders, caps, etc.),
components of air crafts parts of business machines, household appliances, sheet
metal parts of electronic equipments Precision parts required for horlogical
industry etc, are manufacture by press tools.

5. G
U
ID
EP
ILLER- -
CLAMP
- - ---t
- - TOPPLA
TE
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RU
STPLA
TE
--=-
- - - PU
NCHH
O
LDE
R
- f - - - = W i = : _ . ! : :l : ; ;;;;;;;;:T--
=
- STRIPPE
R
r - - GAUG
ES
.,
--
-ulEPLA
TE
'-- - ·
- = = = = = = - - .l..;. . . & b . ,.;. L - _ _ : - BOTTOt.
4PLA
TE
-...
- -
:-.... -PUNCH
+---- -GU
I
DE
BUSH

6. OPEN GUIDEPLATE TOOL
SHANK
PUNCH
STOPPER
STOCK STRIP
ALLEN SCREW HOOK STRIPPER
DIE PLATE
BOTTOM PLATE
DOWEL
FEED DIRECTION
,..--,
'
_
_
'

7. GUIDE PLATE TOOL
SHANK
ALLEN SCREW
I I 1
FEED DIRECTION
0
PUNCH

8. Blanking:
Blanking is a
producingflat stam
pp
r
ic
ne
gs. of
The entire ·
and cut out piec
e
. periphery is cut
is called the blank.

9. Piercing:
It is the operation of making hole in the
stamping. Here also the entire periphery is
cut and cut piece is waste.
1: i
u
.
. - -
I
I I
.J
l I - I
Lf
/
' .
'
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A

10. GUIDEPILLAR
FINGURESTOPPER
.<4 .J-t'-+-f- FL.-- r ---ii........
- DOWEL
PROGRESSIVE TOOL
SHANK
TOPPLATE
GUIDE BUSH
SPRING
•
BOTTOM PATE -.

11. COMPOUND TOOL
DIRECT KNOCKOUT
DOWEL
i
'
•
I
• ALLEN SCREW
TOP PLATE
SHEDDER RETAINER
THRUST PLATE
GUIDE PILLAR
PUNCH HOLDER
PIEARCING PUNCH
DIE PLATE .
GUIDE BUSH
BLANKING PUNCH
LOCATING PINS
STRIPPER BUSH
STRIPPER PLATE
STOCK STRIP / - - --
CLAMP

12. COMPOUND TOOL
INDIRECT KNOCKOUT
SHANK
:
• 11
•
: I :
TRANSFER PLATE
TRANSFER PINS
THRUST PLATE
CLAMPS
PUNCH HOLDER'
SHEDDER
DIE PLATE
BLANKING PUNCH
STRIPPER PL Ti : : -
HEEL BLOCK
SPRING
BOTTOM PLATE
ALLEN SCREW
GUIDE BUSH
GUIDE PILLAR
DOWEL
STRIPPER BOALT
COMPENSATING
WASHER
SUPPORT BLOCK

13. GUIDEBUSH
GUIDEPILLAR
COMPOUND TOOL
INDIRECT KNOCKOUT
SHANK
THRUST PLATE
BOTTM PLATE ALLEN SCERW

15. Cut-off:
Cut off operatio
work material alo n separates the
or angular or irre ; a traight line
cut. No scrap is
off operation.
ar in a single
produced in cutting

16. Parting off:
Parting off is an operation which involves cutoff
operation to produce blank from the strip as
shown in the figure. During parting, some scrape
is produced. There fore, parting is the next best
method for cutting blanks.

17. Bending:
It is the shaping of material around a
straight axis which extends completely
across the material. The result is a plane
surface at an angle to the original plane of
the flat blanked component.

18. Forming:
It is similar to bending except that
the line of bend is along a curved ax is
instead of a straight one.

19. Drawing:
In drawing a flat blank is
transformed into a cup or shell.
Shell or cup produced may
be cylindrical or rectangular with
straight or tapered sides.

20. Trimming :
It is the operation of cutting the
edges of the drawn components which
are wavy and irregular. The term
trimming is also used w hen the
material of a strip or the portion of a
blanked component or a portion of a
pierced hole is partially removed.
A