Module 1A - Concepts of Manufacturing Notes

Manufacturing

  • Definition: Manufacturing is the production of a product or products by processing required raw materials.
  • Etymology: Derived from the Latin words manos factus, meaning made by hand; English word “manufacture” was first coined around 15671567.
  • Scope: Includes the design of products, the selection of raw materials, and the sequence of processes through which the product will be made.
  • Key idea: It is not just assembly but the entire system from concept to finished product, integrating design, materials, processes, and production planning.

Industrial Revolution and Society 5.0

  • Mechanisation (1.0): Introduction of mass production and industrial production equipment driven by water and steam power.
  • Electrification (2.0): Use of electrical energy and assembly lines.
  • Automation (3.0): Automated production due to rise of electronics, telecommunications, and computers.
  • Digitalisation (4.0): Use of cyber-physical systems on connected devices to automate processes further.
  • Personalisation (5.0): Interdependence of man and machine using cognitive computing and human intelligence; mass customization and personalization for humans.
  • Timeline markers:
    • 1780
    • 1870
    • 1970
    • 2011
    • 2020

Industry 6.0 Pillars

  • Technological Pillars of Industry 6.0 include:
    • Artificial Intelligence (AI)
    • Robotics and Autonomous Systems
    • Augmented Reality (AR) and Virtual Reality (VR)
    • Internet of Things (IoT)
    • Blockchain
    • Quantum Computing
  • This reflects the next phase where advanced cognitive computing, connected devices, and new computational paradigms integrate with manufacturing systems.

What is Product Design

  • Product design is the process of creating a new product to be sold by a business to its customers.
  • It is the efficient and effective generation and development of ideas through a process that leads to new products.
  • Product design deals with form and function of a product.
    • Form design: associated with the product's shape.
    • Functional design: associated with the product's working.

Sequential and Concurrent Engineering

  • Sequential Engineering (Traditional):
    • The product/project design is linear and divided into steps.
    • Steps are done one after another; after completion, focus shifts to the next task.
    • Marketing may incur greater time-to-market.
  • Concurrent Engineering (Modern):
    • Non-linear design where different tasks are tackled simultaneously and not necessarily in the usual order.
    • Requires collaboration across teams and disciplines.
    • Marketing time-to-market is reduced.
  • Visual flow (conceptual): Planning → Design → Simulation → Manufacturing → Sales → Support (with concurrent approach, many steps run in parallel).

Product Development Flow (from transcript)

  • Definition of product need; marketing information
  • Conceptual design and evaluation; feasibility study
  • Design analysis; codes/standards review; physical and analytical models
  • Prototype production; testing and evaluation
  • Computer-aided design (CAD)
  • Production drawings; instruction manuals
  • Material specification; process and equipment selection; safety review
  • Computer-aided manufacturing and process planning (CAM and CAPP)
  • Pilot production
  • Production
  • Inspection and quality assurance
  • Computer-integrated manufacturing (CIM)
  • Packaging; marketing and sales literature
  • Product development iterations within market context:
    • Market Specification
    • Concept design iterations
    • Main design
    • Detail design
    • Manufacture
    • Sell

Sustainable Manufacturing at Integrated Levels

  • Definition: Sustainable manufacturing involves using natural resources and energy in ways that do not harm the environment; integrated at product, process, and system levels.
  • Key emphasis: Reducing environmental footprint while maintaining economic viability and social responsibility.

Innovative Aspects in Sustainable Manufacturing

  • Product Innovation
    • Sustainable materials for products
    • Advanced product design
    • Effective product disassembly/recovery
    • Design for reuse & remanufacturing
    • Modular and reconfigurable design
    • Design for improved performance
  • Process Innovation
    • Sustainable processes
    • Advanced process technologies
    • Integrated processes
    • Improved process performance
  • System Innovation
    • Sustainable systems
    • Enterprise-level system integration
    • Supply chain integration

Product Life Cycle (PLC)

  • PLC is a conceptual representation of a product’s ageing process.
  • A product life cycle is the length of time from when a product is first introduced to consumers until it is removed from the market.

Selecting Materials

  • Key properties to consider:
    • Mechanical properties: extYoung′smodulus,extHardness,extetc.ext{Young's modulus}, ext{Hardness}, ext{etc.}
    • Physical properties: extDensity,extMeltingpoint,extetc.ext{Density}, ext{Melting point}, ext{etc.}
    • Chemical properties: extCorrosionresistance,extpHtolerance,extetc.ext{Corrosion resistance}, ext{pH tolerance}, ext{etc.}
    • Cost and Availability: economic aspects
    • Service Life and Recycling: wear, dimensional stability, reusability, etc.

Material Properties (Additional Considerations)

  • Electrical properties; Cost; Reliability; Ease of joining; Mechanical properties; Fabrication

General Types of Materials

  • Ferrous metals: Carbon, alloy, stainless, tool and die steels
  • Nonferrous metals: Aluminum, magnesium, copper, nickel
  • Plastics: Thermoplastics, thermosets, elastomers
  • Ceramics: Glasses, glass-ceramics, graphite, diamond
  • Composite materials: Metal-matrix and ceramic-matrix composites
  • Nanomaterials: Titanium dioxide and amorphous silica
  • Shape-memory alloys: Amorphous alloys and superconductors

Categories of Manufacturing Processes

  • Casting: Expendable mold and permanent mold
  • Forming and Shaping: Rolling, forging, extrusion, drawing, sheet forming, powder metallurgy, molding
  • Machining: Turning, boring, drilling, milling, planing, shaping, broaching; grinding; ultrasonic machining; chemical, electrical, and electrochemical machining; high-energy-beam machining
  • Joining: Welding, brazing, soldering, diffusion bonding, adhesive bonding, mechanical joining
  • Finishing: Honing, lapping, polishing, burnishing, deburring, surface treating, coating, plating
  • Microfabrication and Nanofabrication: MEMS/NEMS, lithography, micromachining, etc.

Selecting Manufacturing Processes

  • Decision criteria include:
    • Surface finish
    • Tolerance
    • Wall thickness
    • Capital cost
    • Mass manufacturing process suitability
    • Labour requirements
    • Selection complexity
    • Cost criteria
    • Tooling cost
    • Production rate
    • Processing time

Categories of Manufacturing Methods (repeat overview)

  • 1. Casting
  • 2. Forming and Shaping
  • 3. Machining
  • 4. Joining
  • 5. Finishing
  • 6. Microfabrication and Nanofabrication (MEMS/NEMS)

Classification of Manufacturing Processes

  • Casting processes
  • Bulk-deformation processes
  • Sheet-metal-forming processes
  • Polymer-processing processes
  • Machining and finishing processes
  • Joining processes

Casting Processes (Schematic Illustrations)

  • Expendable pattern and mold
  • Expendable mold; permanent pattern
  • Investment casting
  • Single-crystal casting
  • Lost-foam casting
  • Melt-spinning process
  • Sand casting
  • Shell-mold casting
  • Ceramic-mold casting
  • Permanent-mold casting
  • Permanent-mold casting variants: Centrifugal casting, Die casting, Squeeze casting

Bulk-Deformation Processes (Schematic Illustrations)

  • Rolling (flat, ring, shape rolling)
  • Forging (open-die, closed-die, heading, piercing)
  • Extrusion and drawing (direct extrusion, cold extrusion, drawing, tube drawing)

Sheet-Metal Forming Processes (Schematic Illustrations)

  • Shearing; Blanking; Punching; Slitting; Piercing
  • Bending and drawing (forming, hemming, deep drawing)
  • Roll forming; Bend forming; Roll bending; Hemming; Deep drawing
  • Stretch forming; Spinning; Hydroforming; Magnetic-pulse forming

Polymer-Processing Methods (Schematic Illustrations)

  • Thermoplastics; Thermosets; Rapid prototyping
  • Thermoplastics: Extrusion; Blow molding; Thermoforming; Injection molding
  • Thermosets: Compression molding; Vacuum-bag forming; Pultrusion; Transfer molding
  • Rapid prototyping: Stereolithography, 3D printing, FDM, Laminated-object manufacturing

Machining and Finishing Processes (Schematic Illustrations)

  • Machining: Turning; Milling; Broaching; Drilling
  • Advanced machining: Wire EDM; Laser machining; Chemical machining; Water-jet machining
  • Finishing: Surface grinding; Lapping; Centerless grinding; Electrochemical polishing

Joining Processes (Schematic Illustrations)

  • Fusion welding; Other welding; Fastening and bonding
  • Fusion welding: Shielded Metal-Arc Welding (SMAW), Flux-Cored Arc Welding (FCAW), Gas-M Metal Arc Welding (GMAW), Gas-Tungsten Arc Welding (GTAW)
  • Other welding: Explosion welding; Friction-stir welding; Cold welding; Resistance welding
  • Fastening and bonding: Adhesive bonding; Wave soldering; Bolted connections; Brazing

Quality Assurance vs Quality Control

  • Quality Assurance (QA): Proactive approach focusing on preventing defects at the process level; part of a quality management system to maintain consistent quality
  • Quality Control (QC): Reactive approach focusing on finding defects in the product itself; testing against specifications
  • Focus:
    • QA: Process-focused, proactive, staff function, prevent defects, quality audits
    • QC: Product-focused, reactive, line function, find defects, testing

Quality Assurance (expanded)

  • QA in manufacturing: The processes used as part of a quality management system to maintain consistent, expected quality by preventing defects
  • QA cycle: Monitor and control → Identify issues with process → Implement quality assurance → Generate corrective actions → Verify corrective action

Quality Assurance Plan (9 Steps)

  • Set procedures and policies for all
  • Schedule roles and responsibilities
  • Documentation in different phases
  • Review and audit
  • Testing phase
  • Troubleshooting problems
  • Project control
  • Training
  • Risk management

Quality Control (definition)

  • A system of maintaining standards in manufactured products by testing a sample of the output against the specification

Total Quality Management (TQM)

  • Definition: A management approach to long-term success through customer satisfaction; all members participate in improving processes, products, services, and the culture
  • Core principles include:
    • Continuous improvement
    • Focus on customer
    • Employee involvement
    • Communication
    • Process centered
    • Decision-making based on facts
    • Team-oriented/systematic approach (TOM; integrated system)
  • Elements:
    • Tom (team/organizational culture) integration
    • Process-centric thinking
    • Fact-based decision making
    • Integrated system approach
  • Advantages:
    • Improves reputation; faults spotted and resolved quickly
    • Higher employee morale; empowerment and teamwork
    • Lower cost; waste reduction
  • Disadvantages:
    • Initial introduction cost
    • Benefits may take years to materialize
    • Possible resistance to change among workers

Closing

  • Thank you