鋼筋對(duì)焊機(jī)的應(yīng)用場(chǎng)景
鋼筋對(duì)焊機(jī)是廣泛用于鋼筋縱向連接及預(yù)應(yīng)力鋼筋與螺絲端桿的焊接。鋼筋對(duì)焊機(jī)的原理是利用對(duì)
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鋼筋對(duì)焊機(jī)是廣泛用于鋼筋縱向連接及預(yù)應(yīng)力鋼筋與螺絲端桿的焊接。鋼筋對(duì)焊機(jī)的原理是利用對(duì)焊機(jī)使兩端鋼筋接觸，通過(guò)低電壓的強(qiáng)電流，待鋼筋被加熱到一定溫度變軟后，進(jìn)行軸向加壓頂鍛，形成對(duì)焊接頭。鋼筋閃光對(duì)焊工藝常用的連續(xù)閃光焊、預(yù)熱閃光焊和閃光-預(yù)熱-閃光焊。對(duì)Ⅳ級(jí)鋼筋有時(shí)在焊接后還進(jìn)行通電熱處理。
鋼筋對(duì)焊機(jī)主要是利用工件對(duì)口接觸電阻產(chǎn)生熱量加熱工件，金屬表面熔化，溫度梯度大，熱影響區(qū)比較小。
焊縫是在工件對(duì)口固相金屬產(chǎn)生塑性變性條件下，形成共同晶粒。焊縫組織、成分接近基本金屬（或者經(jīng)過(guò)熱處理），比較容易獲得等強(qiáng)等塑焊接接頭。
閃光過(guò)程具有排出空氣，降低金屬氧化的自保護(hù)功能。頂鍛還能將氧化物隨液體金屬排出焊縫之外。焊縫夾雜、未焊透等缺陷較少。
閃光過(guò)程具有較強(qiáng)的自調(diào)節(jié)功能，對(duì)嚴(yán)格保持規(guī)范一致性要求較低，焊接質(zhì)量穩(wěn)定。單位焊接截面積需要電功率小，焊接低碳鋼只需（0.1-0.3）KVA/mm2電功率。
焊接生產(chǎn)率高，焊接一個(gè)接頭只需幾秒至幾十秒。
焊接適用范圍廣，原則上能鍛造的金屬材料都可以用閃光對(duì)焊焊接。例如低碳鋼、高碳鋼、合金鋼、不銹鋼等有色金屬及合金都可以用閃光對(duì)焊機(jī)。
焊接截面積范圍大，一般從幾十至幾萬(wàn)mm2截面積都能焊接。
閃光對(duì)焊廣泛應(yīng)用于焊接各種板件、管件、型材、實(shí)心件、刀具等，應(yīng)用十分廣泛，是一種經(jīng)濟(jì)、高效率的焊接方法。
Steel bar welding machine is widely used for longitudinal connection of steel bar and welding of prestressed steel bar and screw end bar. The principle of steel bar butt welding machine is to use the butt welding machine to make the two ends of the steel bar contact, through the strong current of low voltage, after the steel bar is heated to a certain temperature and become soft, the axial pressure forging, forming butt welding joint. Continuous flash welding, preheat flash welding and flash - preheat - flash welding are commonly used in reinforcement flash butt welding process. Of magnitude Ⅳ reinforced sometimes also for electric heat treatment after welding.
The rebar welding machine mainly USES the heat generated by the contact resistance of the workpiece to heat the workpiece, the metal surface melts, the temperature gradient is large, the heat affected area is small.
Welds form common grains under the condition of plastic deformation of solid phase metal. Weld structure, composition close to the base metal (or after heat treatment), relatively easy to obtain iso-strong iso-plastic welded joints.
The flash process has the self-protection function of discharging air and reducing metal oxidation. The forging also removes the oxide from the weld with the liquid metal. Weld inclusion, lack of penetration and other defects are few.
The flash process has a strong self-regulation function, which has a low requirement for strict consistency of specification and stable welding quality. Small electric power is required for welding section area per unit, and only (0.1-0.3) KVA/mm2 electric power is required for welding low carbon steel.
High welding productivity, welding a joint only a few seconds to dozens of seconds.
Welding is applicable to a wide range, in principle can be forged metal materials can be used flash butt welding welding. For example, low carbon steel, high carbon steel, alloy steel, stainless steel and other non-ferrous metals and alloys can be used flash welder.
Welding cross-sectional area range is large, generally from dozens to tens of thousands of mm2 cross-sectional area can be welding.
Flash butt welding is widely used in welding of various plate parts, pipe fittings, profiles, solid parts, cutting tools, etc., is widely used, is an economical and efficient welding method.