FIELD OF THE INVENTION
The Present Invention is a Blanking Tool which Produce the Work piece
by the Shearing Process between Die & Punch. Since the requirement of the
Work piece is in bulk quantity and the material of the work piece is a very thin
metal sheet. Hence to meet the production target of the Work piece Press work
method is used.
BACKGROUND OF THE INVENTION
Blanking tools are presently used in Blanking operation the cutting of
metal between Die & Punch is a shearing process in which the metal is stressed
in there between two cutting edges to the point of fraction or beyond its ultimate
strength. The purpose of the Blanking operation to produce a Work piece the
Work piece metal cut of by the Blanking Tool from the strip of sheet metal as
scrap used as Blank of Work piece.
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SUMMARY OF PRESENT INVENTION
In accordance with one aspect of present invention is to provide a
Blanking tool that has a punch and die perfectly aligned to each other to facilitate
the effective blanking of metal sheets..
In accordance with second aspect of present invention is to provide a
blanking tool that can be mounted on a conventional press
In accordance with another aspect of present invention is to provide a
Blanking Tool that may be quickly mounted to a press.
Annexure‐II
In accordance with yet another aspect of present invention is to provide a
Blanking Tool that has limited opening to prevent hands in press type of
operation.
In accordance with another aspect of present invention is to provide a
lighter Blanking tool to hold and cut the metal sheet work pieces.
In accordance with yet another aspect of present invention is to provide a
Blanking tool that can be properly and effectively utilized to hold, position and cut
the metal sheets by lesser skilled individuals.
BRIEF DESCRIPTION OF THE DRAWINGS
The features and advantages of the present invention will become more apparent
and descriptive in the description when considered together with figures/flow
charts presented:
Fig.-1 is Sectional Front view of the Blanking Tool.
Fig.-2 is Top view of the Lower Bolster of the Blanking Tool.
Fig.-3 is Inverted Top view of the Upper Bolster of the Blanking Tool.
Fig.-4 is Punch & Die view of the Blanking Tool.
DETAILED DESCRIPTION
Referring Fig.1, Fig.2, Fig.3 &Fig.4 the present invention is a Blanking
Tool 25 for the Blanking of the Work piece which is thin gauge sheet, Blank Strip
guided in the guide plates 11 & 12 & position with stopper Pin which Position the
strip after every stock.
Annexure‐II
Blanking Tool 25 Comprises a Lower Plate 1 having surface A and
surface B. surface A and surface B of the Lower Plate 1 is grinded & parallel with
each other. Lower Plate 1 holds the two number Guide Pillar. they are press fit in
the Holes 26 made in Lower Plate 1. Die is also fixed with the Lower Plate 1 &
well Position in respect to the Punch which is fixed in Upper Plate 5 through
Punch Holder 7. Lower Plate fixed on the Lower Bolster surface C of the Press
with Bolts.
Blanking Tool 25 Comprises a Guide Pillar 2 which are press fit in the
Hole 26 made in Lower Plate 1 pillar guided the Guide Bushes 4 which are fixed
with Upper Plate 5 its guide the Upper Plate to get the mating between Die &
Punch with the Proper Clearance all around when Die & Punch takes reciprocal
movement.
Blanking Tool 25 Comprises a Die 3. Die 3 which have through cut out as
the outer Profile of the Work piece, to get the Blank of the Work piece after
shearing Process between Punch 6 & Die. 3.
Blanking Tool 25 Comprises a Guide Bush 4 which is fixed with the Upper
Plate, press fit in the Hole 27 made in Upper Plate 5. Guide Bushes guided in the
Guide Pillar and Provide the precession slide fit to the Upper Plate & Lower Plate
for the reciprocal movement.
Blanking Tool 25 Comprises a Upper Plate 5 of Mild Steel its Holds the
guide bushes, Backing Plate, Stripper Bolt, Punch Holder & Shank in it, Punch
Holder 7 with the Backing plate 8 fixed in Upper Plate through Allen Screw 20 &
Dowel Pin 19.
Blanking Tool 25 Comprises a Punch 6.it is the Matting Part of Die which
Produce the shearing process to cut the Blank Strip and provide the Work piece
as a scrap.
Blanking Tool 25 Comprises a Punch Holder 7 of Mild Steel which holds
the Punch 6, Punch is Press fit with the Punch Holder 7.
Blanking Tool 25 Comprises a Backing Sheet 8, which resist back force of
the punch during shearing process. it is fixed with Upper Plate 5 between the
Upper Plate 5 & Punch Holder 7.
Blanking Tool 25 Comprises a Stripper Plate or Pressure Plate 9 of EN8
which give the Pressure to the Blank Strip during shearing process between Die
to get the smooth shearing with out any deviation in the Work piece it is also
guided in Punch 6.
Annexure‐II
Blanking Tool 25 Comprises a Stripper Bolt 10 of EN8 which Holds the
Stripper Plate 9.Blanking Tool 25 Comprises a Guide Plate R.H. & L.H. 11 & 12
of EN8, its Guide the Blank Strip Sheet between R.H. & L.H Guide Plates.
Blanking Tool 25 Comprises a Shank 13 of Mild Steel it is fixed with Upper
Plate 5 through Threaded Hole 28 made in Upper Plate 5 Shank Holds the Upper
Plate 5 Shank fixed in Upper Bolster of the Press.
Blanking Tool 25 Comprises a Stopper Pin 14 (Std. Dowel Pin) which is
fixed on the Surface E of the Die 3 its position the Blank Strip Sheet after every
stock.
Blanking Tool 25 Comprises a Comp. Spring 21 (Std.) it is fixed between
Stripper Plate 9 & Punch Holder 7 & holed by Stripper Bolt 10, its provide the
pressure on the Stripper Plate to get the pressure on blank strip sheet.
Blanking Tool 25 Comprises a Comp. Spring 22 (Std.) it is fixed between
Lower Plate & guide bush 4 & hold by guide pillar 2,its provide proper motion to
the upper & Lower Plates during reciprocal motion.

WE CLAIMS:-
Accordingly, the description of the present invention is to be considered as illustrative only and is for the purpose of teaching those skilled in the art of the best mode of carrying out the invention. The details may be varied substantially without departing from the spirit of the invention, and exclusive use of all modifications which are within the scope of the appended claims is reserved. We Claim

1. A Blanking tool that holds positions and cut the sheet metal work pieces for the blanking operation to get the desired shape on metal sheet in one store of punch adapted to be positioned on punch press machine. The blanking tool comprising:
- Lower plate adapted to be fixed to the bed of Punch press provides base surface to other sub component of Blanking tool.
- Guide pillar that guides upper plate during downward movement.
- Die and punch of desired shape that facilitates the shearing of work piece.
- Pressure plate exerts pressure during banking for smooth cutting.
- Guide bush Provide the precession slid fit to the Upper Plate & Lower Plate for the reciprocal movement
- Upper Plate holds the guide bushes, Backing Plate, Stripper Bolt, Punch Holder and shank.
- Stopper pin to position the blank strip on die.
- Compression spring to provide pressure on pressure plate.
- Guide plate the guides the blank strip.
2. The Blanking tool of claim 1 wherein, top and bottom surfaces of the upper plate are substantially flat and parallel.
3. The Blanking tool of claim 1 wherein, top and bottom surfaces of the bottom plate are substantially flat and parallel.
4. The Blanking tool of claim 1 wherein, punch and die are fixed on top and bottom plates respectively.
5. The Blanking tool of claim 1 wherein, top plate slides in two pillars perpendicular to top and bottom plates.
6. The Blanking tool of claim 1 wherein, Pressure Plate exerts Pressure on the Blank Strip during shearing process between Die and Punch to get the smooth shearing with out any deviation in the Work piece.
7. The Blanking tool of claim 1 wherein, Backing Sheet fixed with upper plate between the Upper Plate & Punch Holder, resist back force of the punch during shearing process between Die & Punch.
8. The Blanking tool of claim 1 wherein, Guide Bush press fitted in the Hole made in Upper Plate guided in the Guide Pillar and Provide the precession slide fit to the Upper Plate & Lower Plate for the reciprocal movement.
9. The Blanking tool of claim 1 wherein, Shank fixed with Upper Plate through Threaded Hole made in Upper Plate used to holds the Upper Plate in the Upper Bolster of the Press Machine.
10. The Blanking tool of claim 1 wherein, two Guide Plates that guides the Blank Strip Sheet between them to provide the proper position to Blank Strip Sheet. ,TagSPECI:As per Annexure-II