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A lead-free tin and electrode technology, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve problems such as affecting welding quality, spatter, and short circuit between solder joints and solder joints, and achieves low spatter and good heat. The effect of high conductivity and solderability
Inactive Publication Date: 2014-03-26
KUNSHAN SANHAN TIN
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Existing tin welding rods are made by mixing flux and tin together, which are prone to splashing during the welding process due to stress concentration, causing short circuits between solder joints and affecting welding quality
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[0013] Please refer to figure 1 , the new lead-free soldering rod 1 provided in this embodiment includes a rectangular column-shaped main body, one of the surfaces of the rectangular column main body includes a rectangular groove 111 and a circular groove 112, the rectangular At least one of the longest edges of the cylindrical body 11 is removed to form the opening 113 . The novel lead-free solder bar 1 of the present embodiment is preferably a wave solder bar, and the wave solder bar can be divided into a lead solder bar and a lead-free solder bar, and the novel lead-free solder bar 1 of the present embodiment does not contain lead and belongs to lead-free The composition of the solder bar can further be tin-copper (Sn-0.7Cu), tin-silver-copper (Sn-0.3Ag-0.5Cu) or tin-silver-copper (Sn-3.0Ag-0.5Cu). In this embodiment, since one of the longest edges of the rectangular columnar main body 11 is removed to form the opening 113, the stress of the new lead-free tin soldering rod...
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Abstract
The invention provides a novel lead-free tin soldering bar which comprises a rectangular cylindrical body. A rectangular groove and a circular groove are formed in one side face of the rectangular cylindrical body. At least one of the longest edges of the rectangular cylindrical body is removed, so that an opening is formed. After the novel lead-free tin soldering bar is melted, slag-out amount is smaller than that of common soldering tin, good oxidation resistance is achieved, viscosity is low after melting, fluidity is good, solderability is high, environment is protected, the novel lead-free tin soldering bar is suitable for a wave soldering procedure, meanwhile, wettability, electric conductivity and thermal conductivity are good, tinning is easy, the inner stress of the tin soldering bar is released, stability is achieved during a soldering process, and the phenomenon of splashing cannot happen easily.
Description
technical field [0001] The invention relates to the field of welding technology, in particular to a novel lead-free tin welding rod. Background technique [0002] Tin welding rod is a welding rod used for tin welding. Tin welding rod is mainly used for welding of electrical, electronic industry, tin utensils for tableware, welding of high temperature resistant devices, electrical, electronic industry, printed circuit, micro technology, aviation industry and coated metal. General electrical and electronic industries (common antennas for televisions, radio cassette recorders, quartz clocks), aviation, micro-technical sheet metal, lead pipe welding, cables, heat exchanger metal equipment, radiators, cans, etc. Bulb, cooling machine manufacturing, sheet metal, lead pipe sheet metal, boiler and other high-temperature bearing bushes, ceramic baking welding, thermal cutting, graded welding and other low-temperature welding. The existing tin welding rod is formed by mixing and pres...
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