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Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page 30-1 CHAPTER 30 Brazing, Soldering, Adhesive-Bonding, and Mechanical-Fastening.

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Presentation on theme: "Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page 30-1 CHAPTER 30 Brazing, Soldering, Adhesive-Bonding, and Mechanical-Fastening."— Presentation transcript:

1 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page 30-1 CHAPTER 30 Brazing, Soldering, Adhesive-Bonding, and Mechanical-Fastening Processes

2 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page 30-2 Brazing Figure 30.1 (a) Brazing and (b) braze welding operations.

3 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page 30-3 Typical Filler Metals for Brazing Various Metals and Alloys

4 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page 30-4 Furnace Brazing Figure 30.2 An example of furnace brazing: (a) before, (b) after. Note that the filler metal is a shaped wire.

5 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page 30-5 Induction Brazing Figure 30.3 Schematic illustration of a continuous induction-brazing setup, for increased productivity. Source: ASM International.

6 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page 30-6 Joint Designs Used in Brazing Figure 30.4 Joint designs commonly used in brazing operations. The clearance between the two parts being brazed is an important factor in joint strength. If the clearance is too small, the molten braze metal will not fully penetrate the interface. If it is too large, there will be insufficient capillary action for the molten metal to fill the interface.

7 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page 30-7 Brazing Design Figure 30.5 Examples of good and poor design for brazing.

8 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page 30-8 Stenciling Figure 30.6 (a) Screening or stenciling paste onto a printed circuit board: 1. Schematic illustration of the stenciling process; 2. A section of a typical stencil pattern. (continued) (a)

9 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page 30-9 Wave Soldering Figure 30.6 (continued) (b) Schematic illustration of the wave soldering process. (c) SEM image of wave-soldered joint on surface-mount device. (b) (c)

10 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page Types of Solders and their Applications

11 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page Joint Designs Used in Soldering Figure 30.7 Joint designs commonly used for soldering. Note that examples (e), (g), (i), and (j) are mechanically joined prior to being soldered, for improved strength. Source: American Welding Society.

12 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page Typical Properties and Characteristics of Chemically Reactive Structural Adhesives

13 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page General Properties of Adhesives

14 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page General Properties of Adhesives (cont.)

15 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page Adhesive Peeling Test Figure 30.8 Characteristic behavior of (a) brittle and (b) tough adhesives in a peeling test. This test is similar to the peeling of adhesive tape from a solid surface.

16 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page Joint Designs in Adhesive Bonding Figure 30.9 Various joint designs in adhesive bonding. Note that good designs require large contact areas between the members to be joined.

17 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page Configurations of Adhesively Bonded Joints Figure Various configurations for adhesively bonded joints: (a) single lap, (b) double lap, (c) scarf, (d) strap.

18 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page Rivets Figure Examples of rivets: (a) solid, (b) tubular, (c) split (or bifurcated), (d) compression.

19 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page Design Guidelines for Riveting Figure Design guidelines for riveting. (a) Exposed shank is too long; the result is buckling instead of upsetting. (b) Rivets should be placed sufficiently far from edges to avoid stress concentrations. (c) Joined sections should allow ample clearance for the riveting tools. (d) Section curvature should not interfere with the riveting process. Source: J. G. Bralla.

20 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page Metal Stitching and a Double-Lock Seam Figure Various examples of metal stitching. Figure Stages in forming a double-lock seam.

21 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page Crimping Figure Two examples of mechanical joining by crimping.

22 Kalpakjian Schmid Manufacturing Engineering and Technology © 2001 Prentice-Hall Page Spring and Snap-In Fasteners Figure Examples of spring and snap-in fasteners used to facilitate assembly.


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