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挖掘机加长臂厂家为你介绍动臂的修复问题

日期:2019-05-31   来源:
  挖掘机伸缩臂厂家为您介绍了加长臂的维修问题。动臂修复:检查挖掘电机臂侧板腐蚀裂纹时,需刮去或打磨裂缝表面的油漆层或锈蚀。观察时,需用小锤轻敲焊缝,必要时可使用放大镜观察。
  The manufacturer of the telescopic arm of excavator introduces the maintenance of the lengthened arm for you. Moving arm repair: When inspecting the corrosion cracks on the side plate of excavating motor arm, it is necessary to scrape or polish the paint layer or rust on the surface of the cracks. When observing, it is necessary to tap the weld with a hammer and use a magnifying glass when necessary.
  1. 裂缝的原因
  1. Causes of cracks
  矿用移动臂侧板产生裂纹的原因:包括原焊缝本身有气泡、细小裂纹、夹渣等,当挖掘机过劳时,原焊缝会产生细小裂纹并逐渐扩大:当焊条符合板的性能和裂纹:由于大型矿业移动手臂,很难使用可靠和有效的隔热措施,焊接后彻底清除焊缝周围的基础硬化区,导致焊接强度的下降:挖掘机操作过程中振动影响较大,缝不均匀焊缝开裂。
  Causes of cracks in side plates of mine mobile arms include air bubbles, small cracks and slag inclusion in the original weld seam. When the excavator is overworked, the original weld seam will produce small cracks and gradually expand. When the welding rod meets the performance and cracks of the plate, it is difficult to use reliable and effective thermal insulation measures due to large mining mobile arms, and after welding, it will be thorough. Removing the hardening zone around the weld leads to the decrease of welding strength: vibration has a greater impact on excavator operation, and uneven weld cracking.
  2. 修复方法
  2. Repair methods
  焊接前准备:用手砂轮清理原焊缝裂纹处的油污、油漆和锈迹。用气刨机将焊缝裂纹刮至侧板本体,并对之前焊接的基材的硬化区域进行清理。平面切割后,用角度砂轮研磨切口(内界面打磨成v型槽),清洗干净,检查粉红色,确认所有裂缝均已发现并清洗干净。
                                加长臂挖掘机
  Pre-welding preparation: Use hand grinding wheel to clean up the oil, paint and rust on the crack of the original weld. The weld crack is scraped to the side plate body by air planer, and the hardened area of the previously welded base material is cleaned up. After plane cutting, grind the incision with angle grinding wheel (inner surface is grinded into v-groove), clean it, check pink, confirm that all cracks have been found and cleaned.
  根据维修的现有条件,选择Φ5毫米E5015模型(J507)或E5016 J506焊条,烘烤2 h温度低于350℃,在100℃保温,防止电极吸收水分,带上。焊接电流190 ~ 230A。由于挖掘机侧板厚度较大,焊接部分焊接前预热至150 ~ 250℃;在焊接过程中,可采用分段法、对称法和反推法。在焊缝冷却过程中,焊缝金属应不断用手锤敲击以消除应力。在侧板角焊时,为了避免电弧缺陷,应连续焊接,以改善接头的受力状态。
  According to the existing conditions of maintenance, choose 5mm E5015 model (J507) or E5016 J506 welding rod, bake for 2 hours at less than 350 C, heat preservation at 100 C, prevent the electrode from absorbing moisture, take on. Welding current 190 - 230A. Because of the large thickness of excavator side plate, the welding part is preheated to 150 ~ 250 C before welding. In the welding process, segmented method, symmetrical method and back-stepping method can be used. During the cooling process, the weld metal should be hammered continuously to eliminate the stress. In side plate fillet welding, in order to avoid arc defects, continuous welding should be carried out to improve the stress state of the joint.
  焊接完成后,应彻底清除飞溅物、焊渣、焊结节等,焊缝高度不得大于2.5mm。焊缝进行磁粉探伤,不得有裂纹等缺陷。
  After welding, spatters, welding slag and welding nodules should be thoroughly removed, and the weld height should not be greater than 2.5mm. The weld shall be inspected by magnetic powder and shall not have defects such as cracks.
  3.等级的腐蚀的措施
  3. Grade Corrosion Measures
  彻底打磨焊缝,清除锈迹,涂防锈漆。在开挖施工现场,对于现有的腐蚀焊缝,可根据实际开挖情况选用人工除锈。酸洗除锈也可以被使用,也以有机酸为主要家庭,与缓蚀剂、表面活性剂、去锈剂、防锈剂、防锈剂和薄膜形成剂和其他复合材料,由除锈功能,防锈底漆酸洗溶液,通过清洗达到除锈和防锈的目的。
  Thoroughly polish the weld seam, remove rust stains, and apply anti-rust paint. In the excavation construction site, for the existing corrosion welds, manual rust removal can be selected according to the actual excavation situation. Pickling and rust removal can also be used. Organic acid is also used as the main household. With corrosion inhibitors, surfactants, rust removal agents, rust inhibitors, rust inhibitors and film forming agents and other composite materials, the purpose of rust removal and rust prevention can be achieved by cleaning with rust removal function and rust-proof primer pickling solution.
  此外,在使用过程中,应注意使挖掘机经常处于清洁干燥的环境中,保持良好的通风,及时消除腐蚀性气体和水分。
  In addition, attention should be paid to keeping excavators in a clean and dry environment, maintaining good ventilation and eliminating corrosive gases and moisture in time.
 

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