Press Tools detail TNDTE Diploma syllabus for Mechanical Engineering (Tool & Die) (T&D), M scheme is extracted from TNDTE official website and presented for diploma students. The course code (22252), and for exam duration, Teaching Hr/week, Practical Hr/week, Total Marks, internal marks, theory marks, duration and credits do visit complete sem subjects post given below. The syllabus PDFs can be downloaded from official website.
For all other tool & die 5th sem syllabus for diploma m scheme tndte you can visit Tool & Die 5th Sem Syllabus for Diploma M Scheme TNDTE Subjects. The detail syllabus for press tools is as follows.
Rationale:
Modern development of sheet metal industries require more understanding of production of sheet metal products and the machinery and tools involved in the production of the sheet metal products. This subject Press Tools will develop the basic knowledge on the essentials of the production of sheet metal products, the machinery and Tools involved in its production.
Objectives:
The objective of this course is to make the Student:
- To understand the fundamentals of press working, to be familiar with the various press working operations and machines.
- To learn the safety in press working operations.
- To be familiar with the various press and press tool accessories
- To learn about the different types of Die construction.
- To know the various bending, forming and other miscellaneous press working operations.
- To learn about the construction and operation of the different bending dies.
- To be familiar with the various drawing and other related processes
- To know the construction and operating principle of drawing and combination dies.
- To know the basic concepts and the advantages of fine blanking process
- To learn the construction and working principle of various fine blanking dies.
- To learn about the concepts of SMED and quick die changes and its advantages in bringing down the press set up time.
- To learn to trouble shoot in various press tools.
- To be familiar with the specialised press tool applications.
Detailed Content:
Unit I
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Unit II
Press & Press Tool Accessories And Types Of Die Construction
- Mechanical handling devices:- Feeding and reeling mechanisms for coiled sheet metal – Reels and cradles ( decoiler) , roll feeds and its types, hitch feeds.
- Types of die construction:- Cut off, drop through, return type, compound, combination, continental, sub press, follow die, progressive die, transfer die, shuttle die. Function and nomenclature of die components:- Die, die set, die plate, punch, stripper plate, Die spring, rubber keeper, stripper bolt, solid stripper, knockout plate, hold down plate, pad plate, blank holder, pressure pin, die cushion. Attachment components – Dowel, screw, key. Miscellaneous components -Heal, stop block, bolster plate, backing plate, pilot, gauges, insert, cams, hinges and rockers. Commercially available die components – Die sets, die set attachment devices, punches, die buttons, retainers, springs, fluid springs, die cushion and its types.
Feeding mechanism for individual parts – Hopper feeds, dial feeds, chutes, slides, magazine feeds, step feeds, special feeds.
Ejection mechanism – Gravity, air, kicker, lifter, shovel, mechanical hand, ejection by next part.
Transfer mechanisms – Conveyors, shuttle, turnover, turnaround, stacker, rails.
Unit III
Bending And Forming Dies:-
Bending of sheet metal – Bending theory, neutral axis, metal movement, spring back, methods of overcoming spring back. Bending Operations – Bending, flanging, hemming, curling, seaming, corrugating. Types of Bending dies ( construction and working principle) – V bending and its types, edge bending, u bending. Bending operations done using press brake.
Forming operations – Embossing, bulging, crimping, tube forming. Miscellaneous press working operations – slugging, restrike or spank, extrude (holes), coining, hot trimming, cold trimming of die castings and plastic mouldings, riveting, burnishing or sizing, Ironing.
Forming dies – Construction and working principle of solid form dies, pad form dies, curling dies, embossing dies, coining dies, swaging dies, bulging dies. Assembly dies – Riveting, tab stake, upset stake, crimping.
Unit IV
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Unit V
Fine Blanking Tool And Specialised Press Tool Application S
- Fine blanking basics:- Definition and Applications of fine blanking, Working principle of fine blanking tool, V Ring – function of V ring, Dimensions of V ring. Comparison of fine blanking with blanking. Strip width and margin calculations, Calculation of press, Fixing minimum distance from die aperture. Factors affecting Tool life. Importance of punch and die radius. Materials suitable for fine blanking, work hardening during fine blanking, steel, copper and copper alloys, aluminum and aluminum alloys.
- Fine Blanking Machines:- Working principle – Ram movement, Drive systems-Mechanical drives, hydraulic drives, Machine force, Ring indenter force, counter force.
- Fine blanking tools:- Different types of tools – Compound die tooling system with sliding punch, compound die tooling with fixed punch. Clearance calculation -Importance of clearance.
- Specialized Press Tool Applications:- Construction, advantage and applications of advanced multistage tooling, unit tooling, angular piercing tools, CNC turret press. Principle or Quick Die Change (QDC) – need and advantages. Single Minute Exchange of Dies (SMED) – concept need and advantages.
- Factors Affecting Tool Service Life:- Introduction, Elements of Tool performance, Procedure for investigation of tool failure, Trouble shooting in press tools, effect of heat treatment on service life of tools.
Text Books:
- Donald F. Eary., Edward A. Reed, Techniques of Press working sheet metal, Prentice-Hall,Inc., Second Edition, 1974
- Donaldson, Tool Design , Tata McGraw-hill Book company, 23rd edition, 2006.
- . D.Eugene ostergaard, Advanced die making, McGraw-Hill Book company.
Reference Books:
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Model Question Paper 1
Time: 3 Hour
Max. Marks : 75
Part-A
Answer any fifteen questions 1×15=15
- What are stages of cutting in press working?
- What are the causes of clearance?
- How presses are classified
- Define shut height
- What are the types of feeding devices used in press working?
- What is the function of stripper plate?
- What is the function of Blank holder?
- What are the types of die sets?
- Define spring back
- What are the types of bending dies?
- Define embossing
- Write down the types of forming die?
- Define drawing
- What are drawing variables?
- What is blank development?
- Name any three secondary operations
- What is fine blanking
- What is the purpose of “V” ring?
- What are the suitable materials for fine blanking?
- What is SMED?
Part – B
Answer all Questions 5×12=60
- Explain Shear action in die cutting with neat sketch (6)
- Explain the effect of clearance in brief (6)
- Sketch and explain transfer press ( 12 marks)
- Write short notes on
- Hopper feeding mechanism( 6 marks)
- Bolster plate ( 6 marks)
- Explain Combination die with neat sketch ( 12 marks)
- Explain spring back and methods of overcoming spring back with neat sketches ( 12 marks)
- Explain Solid form die with neat sketch (12 marks)
- Explain in detail the variables that affect the quality of the drawn part. (12 marks)
- Sketch and explain
- Verson – wheelon process and
- Marform process.
- Sketch and explain a compound type fine blanking tool with sliding punch.(12 marks)
- Explain in detail the need and advantage of Single Minute Exchange of Dies.(12 marks)
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Model Question Paper 2
Time: 3 Hour
Max. Marks : 75
Part-A
Answer any fifteen questions
- What is piercing?
- What is shut height of a press?
- What is slitting?
- Define the term stripping force?
- Name the feeding devices used in press working.
- What are the material transfer mechanisms used in press shops?
- What is the purpose of a dowel in a press tool?
- What is pilot?
- What is neutral axis?
- Define hemming.
- What is crimping?
- What is spring back?
- What is deep drawing?
- What is drawing speed?
- What is blank holding pressure?
- What is the purpose of air vents?
- Write the advantages of fine blanked parts?
- What are the factors affecting tool life?
- What is the need for quick die change?
- What is the advantage of Single minute exchange of dies?
Part – B
Answer all Questions 5×12=60
- Explain safety in press working operations (6)
- Explain principle of electromagnetic press (6)
- Sketch and explain the construction and working principle of triple action press (12)
- Explain how hitch feeding mechanism works (6)
- Explain the operation of stacker (6)
- Sketch and explain the construction and working principle of transfer die (12)
- Explain seaming and corrugating operations (6)
- Explain crimping and tube forming operations (6)
- Sketch and explain the construction and working principle of riveting die (12)
- Explain the redrawing operation with a line sketch (6)
- Explain the hydro dynamic process (6)
- Sketch and explain the construction and working principle of a semi piercing die (12)
- Sketch and explain the working principle of a fine blanking machine (12)
- Sketch and explain a compound type fine blanking tool with fixed punch (12)
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For detail syllabus of all other subjects of BE Tool & Die, M scheme do visit Tool & Die 5th Sem syllabus for M scheme.
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