Conventional Fabrication

ME5410 Lesson 9

penway
Last updated on Oct 23, 2023 2 min read Course Notes, ME5410

5 Common Types of Robots

  1. Autonomous Mobile Robot
  2. Automated Guided Vehicle
    • tracks / predefined paths, and operator oversight
  3. Articulated Robot (Robot Arm)
    • 2 to 10 R joints
  4. Humanoid Robot
  5. Cobots (Collaborative Robots)
    • Function alongside human
    • or directly with human

Design Process

  1. Client Statement (Requirements)
  2. Problem Definition
    • Clarify objectives
    • Establish user requirements
    • Identify constraints
    • Establish functions
  3. Conceptual Design
    • Establish design specifications
    • Generate alternatives
  4. Preliminary Design
    • Model and analyze design
    • Test and evaluate design
  5. Detailed Design
    • Refine and optimize design
  6. Design Communication
    • Document design
  7. Final Design
    • Fabrication specification and documentation

Purchase

  1. Raw Materials
    • Metals (Ferro vs Non-Ferro)
      • Aluminum Alloy, Steel
      • Strong, Rigid, Hard, Tough
    • Polymers (Thermoplastics vs Thermosets)
      • Acrylic(polymethyl methacrylate, 丙烯), PVC(polyvinyl chloride, 聚氯乙烯), ABS(Acrylonitrile butadiene styrene, 丙烯腈-丁二烯-苯乙烯共聚物), HDPE(high-density polyethylene, 高密度聚乙烯)
      • Water Proof, Corrosion Proof, Resistant to Chemical Attack, Transparent, Electrical Insulation, Poor Head Conductivity
    • Ceramics (Crystalline vs Glass)
    • Composites (Fiber-reinforced vs Particulate)
      • Carbon-fiber-reinforced polymer
      • strong, light weight, non-isotropy
  2. Parts
    • Gear, Srew, Spring, etc
  3. Components
    • Sensor, Energy Sources, Motors, Microcontrollers, etc

Manufacturing

Definition: the application of physical and chemical processes to alter the geometry, properties, and/or appearance of a starting material to make parts or products

It also includes assembly of multiple parts to make products

Shaping Processes

  1. Solidification(固化), for liquid/semi-fluid
    • casting(铸造) and molding(模压)
  2. Particulate(颗粒), for powder
    • start with metal or ceramic powder
    • pressing(压制), sintering(烧结), and powder metallurgy(粉末冶金)
  3. Deformation, for ductile material
    • extrusion(挤压), rolling(轧制), forging(锻造), and drawing(拉伸)
    • thermoforming(热成型)
  4. Material Removal, for brittle/ductile material
    • Machining(机械加工): Lathe(车床), Milling(铣床), Drilling(钻床), Grinding(磨床), Laser Cutting(激光切割)

Choose a Manufacturing Process

  1. Product Characteristics
    • Complexity
  2. Material
  3. Volumn(数量)/Cost(成本)
  4. Lead Time(交货时间)

Assembly

  1. Joining
    • welding(焊接), brazing(钎焊), soldering(焊锡), adhesive bonding(粘接)
  2. Mechanical Assembly