浅析工程机械制造中自动化焊接设备的运用

在工程机械制造中自动化焊接设备的应用能够有效提升工程机械的制造效率,相对于其他的机械制造技术相比,自动化焊接技术具有质量水平高和技术水平高的优势;本文在对自动化焊接技术优势进行说明的基础上,阐述了在现有的技术条件下,自动化焊接设备性能特点,最后对自动化焊接设备结构及技术要求进行了分析,为工程机械的制造工作,特别是使用自动化焊接设备进行机械制造的工作提供借鉴。     

“在兄弟刊物上”

高效节能焊接设备的应用和发展/赵茂森//冶金设备。—1995,(3).—19～22,28 焊接设备是工业上广泛使用的一种通用设备,目前工业发达国家焊接件一般占钢产量的50％,到2000年估计要占到60％以上,而我国焊接结构大约占钢产量的25％左右。本文分析了我国焊接设备的现状,对通用弧焊电源进行了比较,并介绍了逆变电源的原理、特点及CO_2气保焊的技术特点。     

有色金属线材生产中冷压焊接的运用

冷压焊接设备具有操作简单、能耗小以及焊头质量好等优点，是其它焊接设备无法与之比拟的。随着有色金属线材及带材生产质量要求的提高，冷压焊接法将会得到更广泛的运用。     

螺旋焊管预精焊生产线焊接设备引进消化与吸收

从工艺角度介绍螺旋焊管预精焊生产线预焊、精内焊、精外焊的特点及优点,并进行分析、探讨。焊接设备的设计注重细节,更多的是从工艺角度考虑,最大可能地满足工艺要求;其设备做工较为精细,从硬件上保证了焊接质量。引进的焊接设备在设计和加工方面都值得借鉴、消化和吸收。     

棒线材轧机钢坯对焊技术

利用闪光焊接设备对钢坯进行焊接，使棒线材轧机得以不间断生产，提高了产品质量和生产率，同时降低了生产成本。描述了钢坯对焊设备，重点介绍了焊接工艺和质量。     

钼片灯脚焊接设备用的灯脚自动定向输送机构

本实用新型公开了一种钼片灯脚焊接设备用的灯脚自动定向输送机构，该输送机构能做到灯脚定向快捷、输送连续，提高了钼片灯脚焊接设备的生产效率。输送机构的振动盘内壁装有两段各自独立的自下而上盘旋的导轨，导轨的上位端设有对应于下方导轨下位端的排向口，其底部外侧设有斜槽，升降杆下端装有能吸、送灯脚的吸料器，感应杆通过支点支承在支架上，感应杆一端可与接近开关接近，其另一端可与被吸灯脚接触，输送管上部设有与被吸料器吸合住的灯脚相对应的装料口。     

AIMg6．5铝合金焊接试验

对AIMg6．5铝合金进行焊接试验．确定焊接设备、焊接材料、合理的焊接参数，使焊接接头的力学、弯曲性能均满足要求     

美国林肯焊丝在板坯连铸辊复合堆焊中的应用

选用美国林肯电气公司焊接设备和技术以及焊丝，对板坯连铸辊进行堆焊。介绍了连铸辊复合堆焊方法和堆焊工艺参数，堆焊辊比未堆焊辊提高寿命１－２倍。     

《电子工艺实习》教学中的回流焊接技术

回流焊接技术已广泛应用于我国高校的《电子工艺实习》教学中。了解回流焊接设备、掌握回流焊接的技术特点和灵活修改回流焊接工艺参数对提高实习教学中实习产品的质量和可靠性及合格率起着关键的作用。     

带钢激光焊接技术

新的带钢生产技术需要开发带卷接头用的新型焊接设备。这种接头要求很高的焊接精度。现在已可以成功地用3kW的激光焊机进行这种焊接,焊接质量非常可靠。采用这种新型焊接设备需要较高     

大口径油气管道环焊技术的进展及在宝钢的应用

介绍了当前管道工业的发展及管道焊接技术的进展情况,并阐明了管道全位置下向焊接技术的特性.管道环焊缝是由根焊、热焊、填充焊、盖面焊等不同焊道组成.对常用的手工焊、半自动焊和自动焊接方法在管道环焊缝不同焊道焊接时的应用以及各自特点做了介绍,还对焊接材料的选用、焊接设备的选型作了描述.宝钢铜管厂大口径直缝埋弧焊管(UOE)项目即将投产,投产后大口径焊管产品使用技术的研究势在必行,宝钢应尽快开展大口径UOE焊管的环缝焊接技术的研究,为将来的推广应用提供必要的技术支撑.     

Arc Behavior and Droplet Transfer of CWW CO2 Welding

Cable-type welding wire (CWW)CO2 welding is an innovative process arc welding with high quality,high efficiency and energy saving,in which CWW is used as consumable electrode.The CWW is composed of seven wires with a diameter of 1.2 mm.One is in the center,while others uniformly distribute around it.The diameter of twisted wire is up to 3.6 mm,which can increase the deposition rate significantly.With continual wire-feeding and melting of CWW,the formed rotating arc improved welding quality obviously.The arc behavior and droplet transfer were ob-served by the electrical signal waveforms and corresponding synchronous images,based on the high speed digital camera and electrical signal system.The results showed that the shape of welding arc changed from bell arc to beam arc with the increase of welding parameter.The droplet transfer mode changed from repelled transfer,globular transfer to projected transfer in turn.Droplet transfer frequency increased from 18.17 Hz to 119.05 Hz,while the droplet diameter decreased from 1.5 times to 0.3 times of the CWW diameter.     

Effect of Welding Processes on Tensile and Impact Properties, Hardness and Microstructure of AISI 409M Ferritic Stainless Joints Fabricated by Duplex Stainless Steel Filler Metal

The effect of welding processes such as shielded metal arc welding, gas metal arc welding and gas tungsten arc welding on tensile and impact properties of the ferritic stainless steel conforming to AISI 409M grade is studied. Rolled plates of 4 mm thickness were used as the base material for preparing single pass butt welded joints. Tensile and impact properties, microhardness, microstructure and fracture surface morphology of the welded joints have been evaluated and the results are compared. From this investigatio.n, it is found that gas tungsten arc welded joints of ferritic stainless steel have superior tensile and impact properties compared with shielded metal are and gas metal arc welded joints and this is mainly due to the presence of finer grains in fusion zone and heat affected zone.     

Effect of welding processes on tensile, impact, hardness and microstructure of AISI 409M ferritic stainless joints fabricated using duplex stainless steel filler metal

 The present investigation is aimed at to study the effect of welding processes such as shielded metal arc welding, gas metal arc welding and gas tungsten arc welding on tensile and impact properties of the ferritic stainless steel conforming to AISI 409M grade. Rolled plates of 4 mm thickness were used as the base material for preparing single pass butt welded joints. Tensile and impact properties, micro hardness, microstructure and fracture surface morphology of the welded joints have been evaluated and the results are compared. From this investigation, it is found that gas tungsten arc welded joints of ferritic stainless steel showed superior tensile and impact properties compared with shielded metal arc and gas metal arc welded joints and this is mainly due to the presence of finer grains in fusion zone and heat affected zone.     

05CuPCrNi钢等离子弧焊焊接接头的组织与力学性能

 为了研究等离子弧焊在焊接薄板耐候钢时的优越性,对2 mm厚 05CuPCrNi耐大气腐蚀钢分别进行等离子弧焊与MAG焊(熔化极活性气体保护电弧焊)对接焊接,然后对焊接接头分别进行拉伸、弯曲、金相、硬度等试验,通过与MAG焊焊接接头的组织与力学性能对比,结果表明,与MAG焊相比,等离子弧焊时05CuPCrNi耐大气腐蚀钢焊接接头强度相对提高约6%,焊接接头组织为更均匀且细小的铁素体＋珠光体,并无MAG焊中出现的粗大块状铁素体及贝氏体,焊接热影响区较小,焊接接头弯曲性能良好,硬度值及硬度分布情况与MAG相近且无软化现象。     

ZX7—125电子直流弧焊机设计及应用

ZX7—125电子直流弧焊机,采用场效应逆变式电路,工作频率为25kHZ,与可控硅逆变式直流弧焊机相比,具有效率高,便于携带、维护、使用方便等优点。属于高效节能新型弧焊机产品。     

变极性电弧焊接的电流换向过程影响因素试验研究

采用基于反向再燃弧电压产生电路的变极性焊接电源为试验平台,研究了电源设备及其控制参数、焊接回路电缆寄生电感和焊接工艺参数对变极性焊接电流换向过程的影响规律. 试验结果表明,提高反向再燃弧电压值能够提升变极性过程的电流变化速率,而较大的焊接回路电缆寄生电感会降低电流变化速率,同时降低变极性结束时的电流值,不利于变极性过程的电弧可靠再引燃和稳定燃烧. 初始焊接电流越小,则变极性过程结束时的电流值越小,增加共同导通时间可以提高变极性结束时的电流值,但同时降低变极性开始时的电流大小. 因此小电流变极性焊接时可采用较大的反向稳压值并适当增加共同导通时间,以增强变极性过程中的电弧稳定性.      

等离子弧热喷焊技术的发展与现状

等离子弧热喷焊技术是一种以等离子弧为热源,以一定成分的合金粉末作为填充金属的表面强化技术。近年来,等离子弧热喷焊技术研究在设备、控制和应用材料几方面都取得了长足的进展。本文介绍了等离子弧热喷焊技术的发展现状和前景展望。     

Effect of Autogenous Arc Welding Processes on Tensile and Impact Properties of Ferritic Stainless Steel Joints

 The effect of autogeneous arc welding processes on tensile and impact properties of ferritic stainless steel conformed to AISI 409M grade is studied. Rolled plates of 4 mm thickness have been used as the base material for preparing single pass butt welded joints. Tensile and impact properties, microhardness, microstructure, and fracture surface morphology of continuous current gas tungsten arc welding (CCGTAW), pulsed current gas tungsten arc welding (PCGTAW), and plasma arc welding (PAW) joints are evaluated and the results are compared. It is found that the PAW joints of ferritic stainless steel show superior tensile and impact properties when compared with CCGTAW and PCGTAW joints, and this is mainly due to lower heat input, finer fusion zone grain diameter, and higher fusion zone hardness.