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An improperly soldered 'cold' joint, where the wire was not sufficiently heated Broken solder joints on a circuit board. The joint on the right, although unbroken, has separated from the board. Various problems may arise in the soldering process which lead to joints which are nonfunctional either immediately or after a period of use.
Solder, drawn out to a diameter of 1.6 mm and wound/bent around a spool A soldered joint used to attach a wire to a through-pin of a component on the rear of a printed circuit board (not a customary application of such joints) Solder (UK: / ˈ s ɒ l d ə, ˈ s ə ʊ l d ə /; [1] NA: / ˈ s ɒ d ər /) [2] is a fusible metal alloy used to ...
An older technique for body filler on car bodywork, before the plastic age, was the use of body solder. This was a lead-based wiping technique to fill gaps and low spots in steel bodywork, by applying solder with a similar wiping technique and a wooden paddle. The solder used was of even lower tin content, around 10%.
Joints can also be classified based on their anatomy or on their biomechanical properties. According to the anatomic classification, joints are subdivided into simple and compound, depending on the number of bones involved, and into complex and combination joints: [19] Simple joint: two articulation surfaces (e.g. shoulder joint, hip joint)
Although solder paste typically contains around 90% metal in solids by weight, the volume of the soldered joint is only about half that of the solder paste applied. [7] This is due to the presence of flux and other non-metallic agents in the paste, and the lower density of the metal particles when suspended in the paste as compared to the final ...
The reliability of solder joints becomes more of a concern as less and less solder is allowed for each joint. Voiding is a fault commonly associated with solder joints, especially when reflowing a solder paste in the SMT application. The presence of voids can deteriorate the joint strength and eventually lead to joint failure. [19] [20]
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The symbolic representation of a V weld of chamfered plates in a technical drawing. The symbols and conventions used in welding documentation are specified in national and international standards such as ISO 2553 Welded, brazed and soldered joints -- Symbolic representation on drawings and ISO 4063 Welding and allied processes -- Nomenclature of processes and reference numbers.