最新刊期
期 9 ， 2018
- 摘要：During the welding manufacturing process of metal structure with spatial position,the space position and attitude of welding torch relative to the being welded point of workpiece directly affects the forming quality of weld seam. The main research and application aspects of computer vision in the field of welding are analyzed briefly,the current research progress on the detection and control methods of the space position and attitude of welding torch is summarized and concluded,and the technical features along with their merits and drawbacks in application of various methods are discussed. On this basis,two kinds of visual sensors based on the combination of laser structured lights,which were proposed by authors of this paper,are introduced. These two visual sensors can realize the integration of multi-functions such as the detection of cross-sectional sizes of welding groove,the weld seam tracking and the detection of space position and attitude of welding torch in the welding process. Finally,the advantages of the 3 D visual sensor based on Vcsel is pointed out,which has a worthy research and application prospect as the visual sensor in the welding fabrication process.关键词：computer vision;visual sensor;laser structured light;position and attitude detection of welding torch
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发布时间：2023-03-29 - 摘要：The relationships between spray transfer forms and shielding gases for GMAW and its new breakthroughs were discussed.The results show that the spray transfer forms can be subdivided into four types: drop spray,streaming spray,rotating spray and pulsespray transfer. The realization of spray transfer forms in GMAW depends on three major factors:first,the argon-enriched mixed shielding gas;second,the direction of the electromagnetic force is downward;and third,the welding current is equal to or greater than the transition current. When using pure Ar shielding gas and rich Ar mixed gas,there are three main factors formed by the spray transfer,which can realize the spray transfer form. When the pure CO2 shielding gas is used,there are no three main factors formed by the spray transfer,and it is impossible to generate spray transfer form. The exploratory study of the GMAW spray transfer form with pure CO2 shielding gas will help to discover the new practical droplet transfer form in GMAW.关键词：spray transfer;gas metal arc welding（GMAW）;rich-argon mixing gas;transition current
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发布时间：2023-03-29 - 摘要：In order to improve the digital level of the welding production process,a welding database and expert system integrating welding database platform,process designing expert system platform and welding information management platform have been developed. The database platform is used to store and manage the welding data including welding basic data,welding test data,mature welding process data and welding quality diagnosis case data. The expert system of process design has realized the manual design and printing of manual TIG welding,automatic TIG welding,resistance welding and vacuum electron beam welding process files based on knowledge database and inference engine. Welding information management platform has realized online management and control of welding process based on database platform,expert system platform and user rights management. It is proved that the system can realize the purpose of collaborative intelligent office in LAN.关键词：aviation manufacturing;digital welding;database;expert system
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发布时间：2023-03-29 - 摘要：No melted double layer gas of CO2+Ar shielded arc welding,a small amount of Ar inside and CO2 outside,was realized by self designed double layer welding torch. In this paper,influence of CO2 on arc shape and appearance of weld were discussed by welding test of no melted double-layer gas CO2+Ar shielded arc welding and conventional TIG welding under the same welding parameters and obtaining information of arc temperature,distribution of gas mass fraction and heat flux information on the workpiece surface with the help of numerical simulation. The results showed that the introduction of the outer layer of CO2 had a compressive effect on the arc compared to the conventional pure argon arc,the arc voltage increased by about 4.5 V,the maximum heat flux on the workpiece surface increased by 26%,and the penetration reached 3.6 times that of the traditional TIG welding.关键词：CO2;double layer gas;numerical simulation
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发布时间：2023-03-29 - 摘要：Mechanical properties and microstructure of weld joint of SA 738 Gr.B with as welded and PWHT（post weld heat treatment）by SMAW（shielding metal arc welding）and GMAW（gas metal arc welding）are analyzed,it shows increasing welding heat input decreases impact properties of welded joint. During PWHT,weld undergoes grain recovery and recrystallization,meanwhile,inclusions in grain gather for weld and HAZ（heat affected zone） for SMAW at grain boundary,which decrease binding energy for grain boundary,it results in decreasing impact properties of weld and HAZ.关键词：SA-738 Gr.B;weld joint;impact properties
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发布时间：2023-03-29 - 摘要：With the rapid development of building steel structure in recent years,the aesthetic appearance of plastic arts has been favored. In particular,the complex multi-curved structure in the structure of the venue requires high precision of the components,and it is difficult to process by conventional methods. In this paper,the structure of the special box with five-sided curved surface in xiangyang science and technology museum is taken as an example,and the process method is optimized from the aspects of component assembly and welding,and then the precision of components is systematically controlled to ensure that the processing of components meets the design requirements.关键词：venue structure;final surface;special enclosure;production technology;accuracy control
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发布时间：2023-03-29 - 摘要：According to the technical requirements for the manufacture of steel for the first mine car of maximum load in China and characteristics of high strength copper-bearing [w（Cu）=1%1.3%] constructional steel（WA710）,applied experimental analysis of experiments of welding crack resistance and gas protection welding technology under different temperature conditions is carried out.The experimental results of crack resistance（small iron test） show that:under environment of room temperature and low temperature（-5 ℃） and environment relative humidity being 80%,it’s allowed not to carry out preheating welding for such steel. Experimental results of gas protection welding process evaluation show that:with the use of protective gas φ（Ar）80%+φ（CO2）20% and WER70-NH（patented） wire,the mechanical properties of welded joints meet the technical requirements for the manufacture of China’s first mining vehicle of maximum load（363 tons）.关键词：high strength copper structural steel;weldability;load harvesters
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发布时间：2023-03-29 - 摘要：The upper shell is one of the key parts of the TVS-2 M high burn up nuclear fuel assembly using in Tianwan Nuclear Power Plant,which has the irreplaceable important function such as lifting fuel assembly,the control rods entrance,buffering and damping,ect. The upper shell has the characteristics of many components,complex structure,high requirements in dimensional accuracy and welding quality. The product production cycle,repair rate,rejection rate are high in the initial stage of localization trial production,resulting in serious process bottleneck. To ensure the quality of the product of nuclear reactor,it is necessary to study to grasp its core technology. The ultimate realization of manufacturing technology localization of the upper shell,to improve quality and reduce cost. In view of welding equipment modification,welding fixture design,productivity improvement,introduce the research work of manufacturing technical difficulties of automatic welding technology of the upper shell localization. The design of the research derivative has applied for 4 related utility model patents and been authorized.关键词：nuclear fuel;upper shell;automatic welding;fixture design;Tianwan Nuclear Power Plant
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发布时间：2023-03-29 - 摘要：A new method of fusion pulse + short circuit mixed welding（MUP） was developed based on the panasonic digital welding machine GP5 in tangshan. MUP adopts precise pulse+short circuit waveform control technology,which can effectively reduce welding heat input,completely avoid the occurrence of arc extinguishing and upper combustion,indicating that the process of MUP welding is stable. The influence of welding speed,welding frequency and welding current on the shape of fish scales was studied by the single variable method,and the empirical formula of distance between adjacent fish scales was derived. The test results showed that,the spacing between adjacent scales was mainly determined by the frequency of welding and welding speed. With the increasing of welding current,the spacing between adjacent scales in basic remain unchanged when the frequency and the welding speed was fixed.When the welding speed increased or the welding frequency decreased,the distance between adjacent fish scales increased.关键词：pulse+short circuit mixed welding（MUP）;the distance between adjacent scales;the welding heat input;ER4043
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发布时间：2023-03-29 - 摘要：<正>50年代我国基本没有工业,所以也没有焊接技术,为了建设国家的经济,在中央政府的决定下,决定改革高等学校的教育制度,学习苏联的制度,培养建设工业所需的各类专门人才,并决定以哈尔滨工业大学为基础建立工业需要的各类专业。我被清华大学派往哈尔滨工业大学进修学习。在苏联教授的指导下1952年我建立了我国第一个焊接专业,1955年回到清华大学我又奉令在清华大学建立了我国第二个焊接专业。我把当时建立焊接专业的过程写了一个材料,送
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发布时间：2023-03-29 - 摘要：<正>为配合全国能源基础与管理标准化技术委员会（TC20）对GB 28736《电焊机能效限定值及能效等级》的修订工作,需要对该标准的征求意见的反馈意见和建议进行讨论。2018年8月27日,由TC20与成都三方电气有限公司联合举办电焊机能效指标研讨会。会议在成都三方电气有限公司召开,参加本次会议的代表有全国能源基础与管理标准化技术委员会的秘书长陈海红、中
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发布时间：2023-03-29 - 摘要：<正>随着越来越多的机器人进入万千工厂,"智能工厂"成了几乎每一位"业内人士"时常挂在嘴边的热词。在大家的描绘下,智能工厂能利用各种现代化技术,实现管理及生产自动化,提高工作效率、提供决策参考……总之是集各种优势于一身的未来工厂。好虽好,但听着仿佛还有些遥远。如果你也有这样的想法,那不妨和小编一起走进ABB德国海德堡工厂,让你看到这不是未来,这就是今天的智能工厂!ABB在德国海德堡工厂将先进的机器人技术,与物联网
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发布时间：2023-03-29 - 摘要：2018年7月7日,成都电焊机杂志彭亚萍主编、张奎副总经理一行,拜访了上海市焊接学会,学会理事长丁福保、秘书长吴毅雄教授、副秘书长冯大成高工、培训中心副主任杨志武高工、项目主管高翔老师、技术主管宋淑芳高工、市场主管李佶雯老师亲切接待了到访者,就上海市焊接学会学术活动、培训工作、技术服务等进行了深入交流,并陪同参观了学会和培训中心。
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发布时间：2023-03-29 - 摘要：Through the comparative analysis of several methods of on-site rail welding,it can be seen that the on-site flash butt welding has the highest emission. However,the high quality and high efficiency makes it occupy an irreplaceable dominant position in the field of rail welding. In this paper,the causes of serious emissions from on-site flash butt welding were analyzed:the generator power required for heating is very large and the liquid bridge formation and blasting during heating causes transient overload of the generator set;incomplete combustion of the generator creates harmful fume particulate emissions such as CO and etc.,this can be very harmful in the seamless railway construction,especially bring great harm in the construction of the seamless subway. Based on UN5-150 ZB series welding machine,analyzed the relationship between the commonly used welding process and generator set emissions,and further proposed a new emission reduction technology strategy considering welding process parameters such as welding current,voltage,feeding speed,retreat speed and live upset time and etc. Through the process test,we obtained the process parameters that satisfying the requirements of TBT1632-2014,and this greatly improved the subway construction environment. In addition,new attachments to reduce emissions for generator sets were also introduced.关键词：rails;on-site welding;generator set;green welding
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发布时间：2023-03-29 - 摘要：By the analysis of the reasons for the crack defect appeared during the welding of skirt of equipment with large wall thickness supplied by Russia,this paper explains that in the process of welding,the weld stress increases under the dead weight of the equipment and the overlarge constraint degree of itself structure,and that the welding stress cannot have an effective release. As a result,the welds at the relatively weak side cannot give rise to plastic deformation and the crack defect comes into being in the stress concentration region along the upper side of weld. On this basis,it proposes the effective procedure measures to solve the problems about the defect,and provide reference for welding similar structural parts.关键词：large-wall-thickness equipment supplied by Russia;welding cracks;defect treatment
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发布时间：2023-03-29 - 摘要：Forging is the key stage of rail flash welding. K-series welding machine has the characteristics of narrow heating width and steep heating temperature field. However,compared with GAAS80 type fixed welding machine,the performance parameters of upsetting such as upsetting force and speed are deficient. The upsetting control program of K-1000 type fixed welding machine and the structure of upsetting oil circuit are reformed. The purpose of improving the speed of upsetting and keeping pressure is to improve the function of electrified forging stage. The results show that the adjustment and optimization of the hardware can satisfy the adjustment range of the upsetting process parameters and improve the quality of the rail welding head,especially for Quenched and corrosion resistant rail high alloy steel grades.关键词：K series welder;upsetting;process;welding
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发布时间：2023-03-29 - 摘要：Large-scale steam turbine welding rotor has the characteristics of high material strength,large wall thickness,narrow groove gap,high degree of restraint,multi-layer multi-channel welding and different phase transformation of weld and base metal resp-ectively,and the residual stress distribution is very complicated. An axisymmetric finite element model is established for the annular25 Cr2 Ni4 Mo V welding simulation specimen. The residual stress and deformation of welding and heat treatment are studied and compared with the measured results. The results show that the simulation data and the experimental data are well fitted from the distribution trend and the peak position,and the stress distribution is "Pull-pressure-pull".关键词：welded rotor;residual stress;symmetric;deformation
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发布时间：2023-03-29 - 摘要：After completion of stainless steel cladding on low alloy steel of reactor pressure vessel,extensive thinning of base material due to excessive defects may induce the structural integrity analysis dissatisfy the requirements. This study completed the design of complex welding repair of low alloy steel base metal and stainless steel cladding,and based on the test plate of reactor pressure vessel base metal（16 MND5）,the simulate welding repair process via manual arc welding and property analysis have been conducted. The analysis show that the base metal and welding repair area are well-fused,and the chemical composition,micro metallography,corrosion,bending,hardness test and non-destructive test results of the welding repair meet the acceptance requirements.关键词：reactor pressure vessel;low alloy steel;complex welding repair;manual arc welding;stainless steel cladding
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发布时间：2023-03-29 - 摘要：TIG arc additive manufacturing was carried out by using 5356-aluminum alloy on AA6061-aluminum alloy substrate. And the effect of welding current and preheat temperature on additive manufacturing were researched. The microstructure was analyzed and the sample tensile strength was tested. The results showed that the heat input has a great influence on the additive manufacturing forming of aluminum alloy. The fusion width is used as index of heat input to adjust the current accordingly to realize additive manufacturing forming of the aluminum alloy. The deposition is well bonded to substrate. The columnar dendrite is formed between the bonding zone and layer boundary zone. The equiaxed grain is formed inside a layer. The top layer presents a trend of equiaxed grain transformation of fine dendrite due to its good heat dissipation environment. The hardness distribution of the deposited layer is homogeneity with an average hardness of 71.3 HV. The yield strength of deposited layer is 112 MPa,the tensile strength is 255 MPa and the elongation is 28.3%,the tensile fracture is ductile fracture.关键词：arc additive manufacturing;aluminum alloy;forming technology;microstructure;mechanical properties
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发布时间：2023-03-29 - 摘要：A through crack was found at the weld toe of the welding joint between boss and pipe after a long distance transportation,the cause of failure was found through the metallographic test,chemical analysis,fracture analysis and other test methods. The results show that there are defects in the structural design,the thickness of the nozzle is thinner,However,the wall thickness of the boss is relatively thick. And the upper branch of the pipe is not well fixed. And also,there is a cyclic load in the welding joint during the transportation.Meanwhile,there is no smooth transition on the surface of the fillet weld and this problem has not been detected subsequently. All these factors lead to stress concentration at the weld toe,and the fatigue crack is initiated under the cyclic load. In addition,the wall thickness of the nozzle is thinner,so that the crack spreads quickly through the pipe wall,causing fatigue fracture.关键词：welding;fracture;fatigue;failure analysis
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发布时间：2023-03-29 - 摘要：In accordance with the relevant codes and standards,introduce quality control elements of offshore oil engineering steel structure fabrication various working procedures,including prophase bidding,risk analysis,technical clarification,inspection procedure,ITP,material inspection,fit up visual inspection,NDT,heat treatment post welding,on-site of hardness test,etc. Through analysis and explanation,summarize a set of methods about quality control method for offshore oil platform steel structural fabrication,it can be used as a reference for relevant enterprises to engage in offshore oil steel structure fabrication and explore relevant market.关键词：quality control elements;risk analysis;material inspection;visual inspection
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发布时间：2023-03-29 - 摘要：The effects of various situations on friction torque in the first phase for repairing of 7075-T6 aluminum alloy by friction plug welding were analyzed,and the friction torque mathematical model in the first phase of frictional plug welding was established. The various conditions include welding feed speed,welding rotation speed,taper angle of the plug. The results showed that,the peak torque and elapsed time for peak torque to it were affected by welding feed speeds and welding rotation speeds. The peak torque decreased with increasing the welding rotation speed and it increased with increasing the welding feed speed,and the elapsed time for peak torque decreased with increasing the welding feed speed and the welding rotation speed. As the taper angle of the plug increased,the friction torque before the peak torque increased accordingly,but the peak torque and the elapsed time for peak torque hardly changed.关键词：friction plug welding;first phase;friction torque;peak torque;elapsed time for peak torque
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发布时间：2023-03-29 - 摘要：Choose the appropriate welding procedure parameters is the key to improve the welding quality and production efficiency. In the case of CO2 gas protection welding process,control variable method is used to test the impact of a single welding parameter on the impact performance of welding joints. The welding wire with mechanical properties and chemical composition that meet the requ-irements of the classification society is selected. The vertical and upward butt welding position which has a significant impact on the impact performance of the welded joint is adopted. The welding parameters such as temperature,gas flow,welding current,number of welding layers and number of welding passes are separately adjusted for testing. The impact tests are carried out on the welding seams,and the test data and results are analyzed to obtain an effective method to improve the impact performance of the welding seams. The influences of different parameters on the welding performance are also explored,providing experimental reference and theoretical basis for relevant engineers to select welding parameters with ideal impact performance in production.关键词：heat input;interlayer temperature;control variable method;impact value;gas flow
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发布时间：2023-03-29 - 摘要：Enameled wire welding machine is a hot pressure welding technology,and it is mainly used to weld the products like stator and steering gear etc. It is a welding method that can heat the terminal and wire with insulation layer,then pressure welding them together,making them connected and conduct electricity. With the help of the internal engineering defect in the production site,and through the analysis of the welding machine’s theory,optimize the welding proposals based on the four stages of original prepressing,welding,pressure maintaining and ceasing,adding the preheating stage into it. Meanwhile,compare it with the benchmark’s level,analyze and determine the main control parameters during the welding process. The optimal control parameters are determined by carrying out the DOE test. Verification in small batch production,implementation of control methods,and ultimately reduce the internal engineering badness rate from 1.29% to 0,achieving the real zero defect.关键词：hot pressure welding;welding machine parameters;DOE;welding quality problems solving
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发布时间：2023-03-29 - 摘要：In this paper,the welding repair method of oil filter of marine mainframes made of gray cast iron is studied. Through the analysis of gray cast iron and duplex stainless steel materials and their weldability,the technology of transition layer welding of heterogeneous metal is used to repair the fuel filter of the mainframes. Welding lengthens the nozzle on the broken side of the filter to ensure sufficient space for welding. It also formulated a reasonable welding process,conducted a simple welding test on metals of the same material as the fuel filter to verify the feasibility of the process,and then performed repair work on the main fuel filter,and adopted a series of measures to control the welding cracks of gray cast iron. The defects of the main engine fuel filter were eliminated,and the corresponding inspection was carried out after welding,so that the main engine fuel filter was repaired success-fully,and the system operated well,ensuring the transformation cycle of the XX ship.关键词：fuel filter;gray cast iron;double phase stainless steel;xenosteel welding
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发布时间：2023-03-29 - 摘要：In order to solve the communication problems of the welding machine supporting industrial robots,introduces a hybrid communication method of industrial robot with welding machine and realizes it on FAUNC robot based on Huayuan welding machine.The method of digital communication and analog communication is adopted,which not only realizes the ordinary welding function,but also realizes the touch sensing function and arc tracking function,which greatly improves the on-site survival ability of the entire set of equipment. The complete set of industrial robotic welding system is not only cost-effective,but also strong applicability.关键词：Robot welding;arc tracking;hybrid communications
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发布时间：2023-03-29 - 摘要：The plate girder is widely used in the construction of offshore steel structures and LNG modules due to its good mechanical property and structural characteristics. The constitution of plate girder is relatively simple and the pre-fabrication process is relatively regular. But it presents a high demand on process control that great attention needs to be paid to the specific details. Also all the steps are in a tight connection. The construction is involved in various drawings and welding process. Meanwhile,the inspector should not only grasp the use of inspection standards and instruments but need to be capable to record and feedback the observation during the construction. Introduces the fabrication procedure of plate girder in detail and discusses the process control measures and inspection key points during fabrication.关键词：welding;inspection;quality control
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发布时间：2023-03-29 - 摘要：In this paper,an erosion-resistant wear surfacing electrode was developed and a surfacing welding test was performed on the low-carbon steel Q235. The microstructure and wear resistance of the surfacing layer metal were studied. The results show that the welding rod has good welding process performance,less spatter in the surfacing process,stable arc,beautiful appearance of the weld seam,good slag detachability,and no obvious welding defects such as pores and cracks. The microstructure of the surfacing layer metal is mainly composed of lath martensite and a large number of finely dispersed carbonitride precipitates;precipitation has a strong precipitation strengthening effect on the martensite matrix;the metal hardness of the surfacing layer is evenly distributed. The average hardness is HRC43.8,with good performance. Compared with ZG35 Si Mn,the erosion wear resistance of the surfacing layer metal is nearly increased by 0.87 times. It can be used for the manufacture and repair of severely damaged erosion wear parts.关键词：surfacing electrode;erosion wear;precipitation phase
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发布时间：2023-03-29 - 摘要：By understanding the physical and chemical properties of water glass,according to the quality requirements of welding electrode,3.4 M sodium water glass and 3.1 M potassium sodium water glass solid block are used,and according to the "predetermined quality index" adjustment formula and different melting methods,different quality parameters of the water glass are tested in the E4303 welding electrode. The results show that the different quality parameters of water glass blended under the same conditions have obvious effects on the appearance quality and welding process performance of the electrode. The quality control of the glass for the manufacture of welding electrodes is clarified through the influence of different quality parameters of water glass on the appearance quality of the welding electrode and the performance of the welding process. The method of how to adopt the appropriate method for regulation when the water glass quality parameters deviate from the quality requirements is described.关键词：water glass;welding electrode;test verification;quality requirements;quality control
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发布时间：2023-03-29 - 摘要：<正>书号:0226售价:38.00元本教材以焊接结构制造工艺过程为主线,全面论述焊接结构制造中的工艺规程编制、备料加工、装配焊接及装备、典型焊接结构的制造技术、质量控制与检测、焊接生产环保和安全等五大板块,共8章。本教材较全面地反映了焊接结构制造的新技术、新方法和新装备。本教材可作为普通
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发布时间：2023-03-29 - 摘要：<正>书号:0095定价:16元焊接操作中存在诸多危险因素和有害因素,可能发生触电、火灾、爆炸、灼烫和高处坠落等工伤事故,还可能患眼睛、皮肤、呼吸系统和血液等疾病。因此,焊接属于特种作业,电气焊工属于特殊工种,遵照国务院颁布的有关规定,焊工必须经过安全培训并考试合格,方准独立操作。并且在取得安全考核合格证之后,尚需定期参加复审。焊接安全与卫生防护的教学内容繁多,涉及的理论知识范围甚广,本书是根据国务院1963年
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发布时间：2023-03-29 - 摘要：<正>《电焊机》杂志是中国科技论文统计源期刊（中国科技核心期刊）、《中文核心期刊数据库》收录期刊"、英国《科学文摘》（INSPEC）来源期刊""俄罗斯《文摘杂志》收录期刊""美国《剑桥科学文摘》（CSA）收录期刊""波兰《哥白尼索引》（IC）"收录期刊等。各地邮局均可订阅,邮发代号:62-81,订价:15元/月,180元/年。
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发布时间：2023-03-29 - 摘要：<正>书号:0111定价:26元为配合技师评聘工作的开展,满足机械行业对工人技师培训和考评的需要,加快技师培训教材建设,我们经过到上海、江苏、四川等地进行广泛的调研,并结合《通知》精神,确立了教材编写的总体思路;组织了一批由工程技术人员、教师、技师、高级技师组成的编写队伍,编写了这套《机械工业技师考评培训教材》。全套教材共22种,包括四种基础课教材和车工、钳工、机修钳工、工具钳工、镜工、磨工、焊工、铸造工、锻造工、热
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发布时间：2023-03-29
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