ME364_combining_asse - 8 PROCESSES FOR COMBINING SINGLE PARTS CHAPTER CONTENTS 8.1 8.2 Mechanical assembly Processes for non-permanent assembly

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149 8 PROCESSES FOR COMBINING SINGLE PARTS 8.1 Mechanical assembly Processes for non-permanent assembly Processes for permanent assembly 8.2 Fusion welding Types of welding processes Oxyfuel gas welding Arc welding with consumable electrodes Arc welding with non-consumable electrodes Weld quality in arc welding Resistance welding 8.3 Solid-state welding Forge welding Cold rol welding Diffusion welding Explosion welding Friction welding CHAPTER CONTENTS Introduction Manufacturing processes discussed so far include operations for producing of a single product, i.e., product that consists of a single piece of metal. But in the real life very few of the manufactured products consist of a single part. Most common situation is when a commercial product is an assembly , a composition of single parts, or single parts and so called subassemblies , which are groups of single parts combined to serve certain purpose and forming part of a larger assembly. For example, a simple ballpoint pen an assembly composed of three single parts, a plastic tube and two caps, and one subassembly, a cartridge. The cartridge itself can be considered as an assembly of few more single parts, in which a ±ne metallic or ceramic ball rotates against a supply of semisolid ink. Manufacturing processes, in which single parts are combined to form an assembly are referred to as manufacturing processes for joining and assembling . These processes can be divided into two major classes, ± processes for non-permanent combining , which allow for multiple disassembly and assembly of single parts and/or subassemblies, and ² processes for permanent combining of single parts and/or subassemblies. Eventual disassembly would result in severe damages to the components in the assembly and the subsequent assembly if attempted would not be possible any more. Further classi±cation is possible with respect to the operational methods used as follows, v mechanical assembly , which involves the use of various fastening methods to mechani- cally attach two (or more) parts and/or subassemblies together. This group includes processes for permanent ( riveting , press or shrink Ftting ) or non-permanent (assembly with threaded fasteners ) assembly; v joining processes
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This note was uploaded on 12/26/2011 for the course ENGINEERIN 364 taught by Professor Staff during the Fall '11 term at Eastern Mennonite University.

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ME364_combining_asse - 8 PROCESSES FOR COMBINING SINGLE PARTS CHAPTER CONTENTS 8.1 8.2 Mechanical assembly Processes for non-permanent assembly

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