Steel construction solders in simple and unwary doubt

Solder to fill in in contact space welding rod head or iron piece

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Because solder when hard welding rod head or iron piece and be by weldment frit an organic whole, can form incomplete fusion, not frit is appeared etc solder defect, drop join intensity. If use stuff of rusty welding rod head, iron piece, ensure the raw material with mother capable person is collective hard; If use stuff of the welding rod head that smeary, impurity waits, iron piece, can make welding line produces the stomatic, slag inclusion, defect such as crackle. These states all can make the welding line quality of contact drops greatly, short of plans and the standard asks to the quality of welding line.
[method]
(1) spell outfit space when workpiece very big, but the dimensions that did not surmount a regulation to promise to apply, spell outfit space to surmount thin plate board 2 times thicker or when be more than 20mm, place of low-lying of fill and level up of use v method or reduce spell outfit space. Prohibit head of ram welding rod is chosen in contact space or the method of iron piece filling solder.
(2) when spare parts treatment is underlined, should leave what sufficient incision surplus reachs incision hind to solder alertly shorten surplus, hold accuse good part measure, do not ensure in order to add space appearance measure.

Choose different when the plank butt joint of ply and width, not abrupt transfer

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Choose different when the plank butt joint of ply and width, not advertent board ply difference is in the standard promises dimensions inside. If promising dimensions inside and do not do abrupt transfer processing, welding line is in in ply of tower above thin plate easy bring about stress is centered and produce incomplete fusion to wait solder defect, the influence solders quality.
[method]
Answer to become welding line solder brae state when oversteping concerned provision, its rake is the biggest promise a value to should be 1: 2.5; Or the one side of ply or two sides machine brae before solder, and rake is the biggest promise a value for 1: 2.5, should bear directly move load and the tectonic brae rake that demand undertakes tired out checking computations should not be more than 1: 4. Different when the plank butt joint of width, answer to choose hot incision according to factory and building site condition, the method of machining or emery wheel burnish makes his abrupt transfer, and its join part is the largest promise rake to be worth for 1: 2.5.

Do not solder alertly to having the member of welding line of thrust deep into the enemy forces order

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To having the member of welding line of thrust deep into the enemy forces, acquit of welding stress of analysis of not careful course and welding stress are affected to component part metabolic and reasonable arrangement solders order, however freely applies solder at will, achievement can form NT-joining to be manacled each other, produce bigger temperature to shorten stress, make board be out of shape, board face is rugged, make welding line appears likely crackle.
[method]
To having the member of welding line of thrust deep into the enemy forces, should protocol solders reasonably order. When should welding line of a few kinds of vertical horizontal thrust deep into the enemy forces applies solder, should first solder shortens be out of shape bigger T-joining, after that solder is fore-and-aft welding line, so solder fore-and-aft welding line won't suffer when transverse weld manacle, make of T-joining shorten stress gains release below chainless state, can cut down solder be out of shape, ensure welding line quality, or solder first fillet weld of the solder after butt welding is seamed.

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