Non-Arc Welding Processes - CCCTC Home

Non-Arc Welding Processes - CCCTC Home

Introduction Non-Arc Welding Processes Resistive heating, chemical reactions, focused light and electrons, sound waves, and friction can also be used to join materials Resistance welding Oxy-Fuel Welding

Friction welding (&Solid State) Laser and electron beam welding Brazing and soldering Plastics joining Adhesive bonding Adhesives Thermosets form long polymer chains by chemical reaction (curing) Heat is the most common means of curing Ultraviolet light, oxygen - acrylics Moisture - cyanoacrylates Thermoplastics (hotmelts) Adhesive is heated until it softens, then hardens on cooling -Polyethylene, PVC

0.1.1.2.6.T26.95.12 Adhesive Bonding Curing of Adhesives Thermosets form long polymer chains by chemical reaction (curing) Heat (epoxy) Ultraviolet light, oxygen (acrylics) Moisture (superglue)

Stress Modes - Best to Worst 1. Compression 4. Peel 2. Shear 3. Tension 5. Cleavage 0.1.1.2.6.T29.95.12 Adhesive Bonding

Why Adhesive Bonding? Dissimilar materials Plastic to metal Materials that can be damaged by mechanical attachments Shock absorption or mechanical dampening Laminate structures Skin to honeycomb structure Adhesive Selection Adhesive Bonding Adhesive selection is based primarily on

Type of substrate Strength requirements, type of loading, impact requirements Temperature resistance, if required Epoxy Cyanoacrylates Anaerobics - metals Urethanes

Silicones Pressure sensitive adhesives (PSAs) Advantages Joining dissimilar materials - plastic to metal Materials that can be damaged by mechanical attachments Blind joints Shock absorption or mechanical dampening Temporary alignment Laminated structures Thin substrates - skin-to-honeycomb construction Stress distribution 0.1.1.2.6.T27.95.12 Adhesive Bonding

Limitations Adhesives dont do work, they distribute work; they are not structural materials Environmental degradation Temperature Oxidation Difficult to repair Curing or setting time Surface preparation

Recently Viewed Presentations

  • Evaluate two models or theories of one cognitive process with ...

    Evaluate two models or theories of one cognitive process with ...

    Provides a morethoroughexplanation of the STM than the multi-store model of memory. Usefultounderstandcognitive tasks. Explains multi-tasking. Workingmemorycapacity has beenconnectedwithintelligence, mathematicalperformance (Eysenck 1988, Holmes et al 2008) Limitations. the nature and role of the central executive is still unclear
  • Linear Algebra and Its Applications

    Linear Algebra and Its Applications

    Matrices having the same eigenvalues are not necessarily similar. Similarity and row equivalences are different equivalence relations. Elementary row operations usually change matrix eigenvalues. Application to dynamic systems.
  • Презентация PowerPoint

    Презентация PowerPoint

    Bioethanol Anhydrous high-octane ethyl alcohol (alcohol content 99.0%, octane number under the BSD research method is at least 106 units), obtained in the course of processing of plant regenerative raw materials by the method of fermentation of sugars by microorganisms...
  • Diversity Activity "A Box of Crayons" In honor of Martin ...

    Diversity Activity "A Box of Crayons" In honor of Martin ...

    "A Box of Crayons" In honor of Martin Luther King Day Christiane Bresson What You Need Crayons, pencils, markers Paper The poem "A Box of Crayons" Crayon pattern What You Do 1. Read the poem "A Box of Crayons" to...
  • Which of these lists the six categories for

    Which of these lists the six categories for

    Which hormone is correctly paired with its function? Calcitonin/stimulates osteoclast activity PTH/reduces calcium ion concentration of body fluids Calcitrol/inhibits calcium and phosphate ion absorption along the digestive tract Thyroxine/stimulates osteoblast activity Why does a child who has rickets have difficulty...
  • Part 2: The Argument

    Part 2: The Argument

    thesis statement. Evidence. What information from the documents is there to support your . Reason #2? Use evidence from the documents to provide two to three details about Reason #2. Make sure that you identify each source that you reference...
  • بسم الله الرحمن الرحيم

    بسم الله الرحمن الرحيم

    Anatomy of the rectum. Length ranges from 12-15 cm (Figure 1). It is divided to upper, middle ,and lower thirds. Rectum begins at recto-sigmiod junction opposite S3 vertebrae (buttom of sacroiliac joint), ends at anorectal ring 1 inch below coccyx...
  • MIT course on Oscillations and Waves (by Prof. Walter Lewis)

    MIT course on Oscillations and Waves (by Prof. Walter Lewis)

    Solutions: Comparing Solutions: Waves are the key to sound, color, and much more: Rainbow Sunglint Tsnunamis Earthquakes Cel Phone signals Microwave ovens Musical Instruments … Rainbow Physics Cloud Rainbow observed from space: F-M. Breon, P. Goloub, 1998. The Sunglint What...