fine blanking
Post on 03-Nov-2014
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FINE
BLANKING
•Submitted ByVilas T. Gadhave
Suyash L. Khairnar(MET`S Institute Of Technology ,Nashik)
INTRODUCTION
• What is Fine blanking• Features
WHAT IS BLANKING
EVOLUTION IN BLANKING PROCESS : FINE BLANKING
DIFFRENCE BETWEEN BLANKING & FINE
BLANKING
• Depending upon clearance between die & punch
• Depending upon the deformation (shearing) of metals
• Depending upon the forces applied
DIFFRENCE BETWEEN BLANKING & FINE
BLANKING
Conventional Blanking 1.Punch
2.Sheet Metal 3.Die
Fine Blanking 1. Punch
2. Work Piece
3. Die 4. V-Ring 5. Ejector
DIFFRENCE BETWEEN BLANKING & FINE
BLANKING
Surface produced by conventional method (top)
Smooth surface produced by FB(bottom)
Surface produced by conventional method (left)
Smooth surface produced by FB(right)
STEPS INVOLVED IN FINE
BLANKING
1. Tool in open condition along with the strip ready to cut
2. Bottom moves up & tools closed. Ring groove (Fr) and counter (Fg) forces are activated
STEPS INVOLVED IN FINE
BLANKING
3. Blanking force (Fs) activated &material being out to produced part. Ring
groove & counter force
still remains active
4. Bottom moves down & tool is in open condition
STEPS INVOLVED IN FINE
BLANKING
5. Ejected force (Fe) activated. Strip & slug ejected
6. Part ejected
PARAMETERS INVOLVED IN FINE BLANKING
1. Forces2. Fine blanking accuracy3. Fine blanked edge quality4. Gear teeth
1. FORCES
2. FINE BLANKING ACCURACY
The accuracy that can be achieved in fine blanked parts is largely dependent upon
1. The accuracy of tools & there quality of maintenance
2. The quality of raw materials 3. The thickness of materials 4. The complexity of component’s shape
3. FINE BLANKED EDGE QUALITY
• One of the great advantages of Fine blanking is its ability to produce a straight, clean edge. The final quality of the edge surface is influenced by many factors, the main ones being:
• Quality of the Tooling
• Quality of the Raw Material
• Type of Raw Material
• Cutting Lubricant
4. GEAR TEETH
• Fine blanking is the only metal stamping process that can produce a gear in single operation.blanking is the only metal
FINE BLANKING PRODUCTION LINE
The fine blanking is the heart of automatic fine blanking production line,which usually consists of the above components
EQUIPMENTS USED
FINE BLANKING PRESSES
400 Tones FB Press 160 Tones FB Press
ADVANTAGES & DISADVANTAGES
• Compared with conventional stamping
• Compared with machining
APLICATIONS
Vehicles Textile industry Locks & keysOptical instrument
Agricultural instruments Air planes
General Machines
ElectricalsHousehold ComponentsWeaponsOptical instruments
APPLICATIONS
•Blanking is used to produce both internal & external gear forms•This eliminates hobbing & grinding
CONCLUSION
• From the graph we conclude that in conventional process the cost goes on increasing as the quantity is increased. While in fine blanking cost reduces progressively.
• Hence fine blanking process is more useful in mass production industries
THANK YOU
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