10-21

Welding method of battery module

2023-10-21

Abstract: This paper introduces the welding methods of battery module, including regular welding, laser welding, friction welding, ultrasonic welding and so on. Firstly, the principles and characteristics of various welding methods are briefly summarized, and then the specific steps of the welding operation of the battery module are introduced in detail, including the preparation before welding, the welding process and the inspection after welding. Finally, various welding methods are compared and evaluated, and their advantages and disadvantages and scope of application are pointed out. 1. Introduction With the rapid development of electric vehicles and energy storage systems, the demand for battery modules is increasing. In the manufacturing process of the battery module, welding is one of the key process links. The quality of welding directly affects the performance and service life of the battery module. Therefore, it is of great significance to study and select a suitable welding method for the manufacture of battery modules. Principles and characteristics of 2. welding methods 1. Fusion welding Fusion welding is a welding method in which metal joints above the melting point are heated, fully melted and mixed, and then solidified in the liquid state to achieve the connection. Fusion welding has the advantages of mature technology, wide application range and low cost. However, fusion welding is prone to uneven heating, resulting in deformation and damage of the battery module. 2. Laser welding Laser welding is a welding method that uses a high-energy laser beam to act on the metal surface to melt and solidify the metal into one. Laser welding has the advantages of high energy density, fast welding speed, small heat affected zone and high weld quality. However, the laser welding equipment is expensive and the cost is high. 3. Friction welding Friction welding is a welding method that generates heat energy through friction, heats the metal surface to a plastic state, and then applies pressure to achieve a connection. Friction welding has the advantages of energy saving, environmental protection and simple operation. However, the manufacturing cost of friction welding is high. 4. Ultrasonic welding Ultrasonic welding is a welding method that uses high-frequency vibration energy to transmit to metal connectors to generate frictional heat energy to achieve connection. Ultrasonic welding has the advantages of high efficiency, energy saving and simple operation. However, the equipment cost of ultrasonic welding is high. 3. battery module welding operation process 1. Preparation before welding Before welding the battery module, the following preparations are required: clean up the impurities such as oxide and grease on the surface of the battery module and the connection area; check whether the specifications and models of the connectors match; prepare the required welding equipment and materials. 2. Welding process After the relevant preparations are prepared, the welding operation of the battery module may be performed. The following is a detailed description of fusion welding as an example: a. Place the battery module in a special fixture and fix it; B. Use a flame spray gun to uniformly preheat the connection area of the battery module; c. Place the connector in the preheated connection area and adjust the position; d. Use manual arc welding or gas shielded welding for welding; E. after the completion of welding, check whether there are false welding, air holes and other defects. Other welding methods are similar to fusion welding. Please refer to the book or manual of the corresponding welding method for specific operation. 3. Inspection after welding After the welding is completed, the quality inspection of the battery module is required. The inspection contents include: appearance inspection, non-destructive testing (such as X-ray testing, ultrasonic testing, etc.), performance testing (such as tensile strength, air tightness, etc.). Unqualified battery modules need to be repaired or scrapped. Comparison and evaluation of different welding methods in 4. The following table compares and evaluates the advantages and disadvantages of the four welding methods: | Serial | Welding Method | Advantages | Disadvantages | | --- | --- | --- | --- | | 1 | Fusion welding | Mature technology, low cost, wide application range | Easy to deform and damage battery modules due to uneven heating | | 2 | Laser welding | High energy density, fast welding speed, high weld quality | Expensive equipment and high cost | | 3 | Friction welding | Energy saving, environmental protection, easy operation | High manufacturing cost | | 4 | Ultrasonic welding | Energy saving, environmental protection, simple operation, high production efficiency | High equipment cost It is difficult to achieve stable welding joint processing for battery module connection of brittle materials and dissimilar materials:(1) Surface cleaning: Clean out materials that can absorb laser beams on both sides of the groove. (2) Assembly: assemble and align the groove to be welded. (3) Arc striking: ignite the laser beam in the groove. (4) wire feeding: the filler wire to be protected is sent to the molten pool. (5) Molten pool formation: After feeding the filling wire, the molten pool is formed. (6) molten pool stirring: make the filling wire in the molten pool evenly mixed. (7) Melting of filling wire and control of wire feeding speed. (8) Melting speed control of the filler wire. (9) Filler wire feeding speed control. (10) Solidification process of molten pool. (11) Turn off the laser: Turn off the laser after waiting for the molten pool to completely solidify. (12) Protective gas: (inert gas). (13) Cleaning: Slag and

10-20

Will handheld laser welding replace argon arc welding?

2023-10-20

Before discussing whether handheld laser welding will replace argon arc welding, let us first understand the characteristics and advantages of these two welding technologies. Argon arc welding is a commonly used welding method, its characteristics include small heat affected zone, high weld strength, small welding deformation and so on. The advantage of argon arc welding is that its molten pool protection effect is better, which can effectively avoid the contact between the molten pool and the air, thereby reducing the oxidation reaction and improving the quality of the weld. In addition, argon arc welding also has the advantages of simple operation, strong adaptability and wide application range. In contrast, handheld laser welding is an emerging welding technology with the advantages of high energy density, high precision, and high speed. Laser welding can achieve a fine welding process by precisely controlling the laser power and beam transmission, resulting in higher efficiency and better quality in certain application scenarios. From a technical point of view, handheld laser welding does have some advantages, such as high energy density, precise control, etc. These advantages make laser welding have certain competitiveness in some specific fields of application. However, as a mature welding technology, argon arc welding has been widely used in various fields, including automobiles, shipbuilding, aerospace, etc. In many cases, argon arc welding is still one of the most suitable welding methods. Therefore, to determine whether handheld laser welding will completely replace argon arc welding, various factors need to be considered, including cost, efficiency, quality, and application range. In terms of cost, laser welding equipment is generally more expensive than argon arc welding equipment. Although hand-held laser welding equipment is relatively light and easy to carry, its long-term operation and maintenance costs are still high. In addition, the power and stability of the laser also need to be fully tested and verified to ensure its reliability and stability during the welding process. In contrast, argon arc welding equipment is usually more mature and cheap, procurement and maintenance costs are low. In terms of efficiency, argon arc welding still has advantages in some application scenarios. For example, for irregular or narrow welding areas, argon arc welding can be more flexible welding operations. In addition, argon arc welding can usually complete high-quality welding in a short time, which is very important for some industries with fast production pace. Hand-held laser welding may be improved in terms of speed and production efficiency, but in some cases, argon arc welding is still the most appropriate choice. In terms of quality, argon arc welding can achieve high-quality welding through appropriate process parameters and operating skills. In addition, argon arc welding can adapt to various materials and joint forms, and has a wider range of applicability. In contrast, the quality of handheld laser welding depends on the performance of the laser, the beam quality, the accuracy of the control system, and the skill level of the operator. Although handheld laser welding excels in some fields, argon arc welding is still a reliable choice in large-scale production and demanding applications. In the scope of application, argon arc welding has a wide range of applications and advantages. For example, argon arc welding is widely used in metal processing, shipbuilding, petrochemical and other fields. In addition, argon arc welding can also be used for special processes such as welding of dissimilar metals, welding of sheet materials, and surface surfacing. In contrast, the application range of handheld laser welding may be relatively limited, especially in some traditional fields, argon arc welding is still one of the preferred welding methods. In summary, handheld laser welding has certain advantages in certain specific fields, but various factors need to be considered before replacing argon arc welding in an all-round way. Although handheld laser welding has the advantages of high energy density and precise control, argon arc welding still has advantages in long-term operation and maintenance costs, production efficiency, welding quality and application range. Therefore, whether handheld laser welding will replace argon arc welding depends on specific application scenarios and needs. In some areas, handheld laser welding may gradually become one of the mainstream welding methods; while in other areas, argon arc welding will still occupy an important position. The final decision will depend on a combination of technological advances, cost-effectiveness, industry trends and user needs. In short, as a new welding technology, handheld laser welding has the advantages of high energy density, high precision and high speed. However, as a mature welding method, argon arc welding is still widely used in various fields. To determine whether handheld laser welding will replace argon arc welding, various factors need to be considered, including cost, efficiency, quality, and application range. The final decision will depend on the specific application scenarios and needs, as well as a comprehensive consideration of factors such as technological progress, industry trends and user needs.

10-19

In what areas can welding robots be used?

2023-10-19

Welding robots can be widely used in various fields, including but not limited to the following aspects: 1. **Automobile manufacturing**: The welding of automobile bodies is one of the most important tasks in automobile manufacturing. The robot arm has excellent accuracy and stability, can accurately control the droplet transfer, reduce the number of welds, and improve the quality of the body. Welding robots are widely used in automatic coating and welding production lines. 2. **Aerospace**: In the field of aerospace, welding robots also play an important role. Whether it is the manufacture of aircraft fuselages or rockets, a lot of high-quality welding work is required. The welding robot can accurately control the welding parameters, ensure the welding quality and improve the production efficiency. 3. **Power Engineering**: In the field of power engineering, welding robots are widely used in the manufacturing process of power station boilers, electrical cabinets and other equipment. These devices require a large amount of high-quality welding work, and the precise control and stability of welding robots can ensure welding quality and improve production efficiency. 4. **Shipbuilding**: Shipbuilding also requires a lot of welding work. Welding robot can complete various welding tasks quickly and accurately, and improve production efficiency and quality. 5. **Pressure vessel manufacturing**: Pressure vessel manufacturing requires welding a large number of steel plates and pipes. Due to poor working conditions, heavy workload, and high labor intensity, it has brought certain difficulties to production. Welding robots can solve these problems and improve production efficiency and quality. 6. **Other fields**: In addition to the above fields, welding robots are also widely used in construction, railways, pipelines and other fields. In these areas, welding robots can quickly and accurately complete a variety of welding tasks, improve production efficiency and quality. In short, the welding robot has the advantages of high precision, high stability and high efficiency, and can be competent for welding tasks in various complex environments. With the continuous advancement of technology and the continuous expansion of applications, welding robots will play a more important role in the future. The above is about the welding robot can be used in what areas of the introduction, if you need more information, you can further understand the working principle of welding robot, technical characteristics and other aspects of knowledge.

10-18

Application of Industrial Robot in Processing and Manufacturing

2023-10-18

1. Introduction In today's highly automated era, industrial robots have become an important part of the field of processing and manufacturing. With its high precision, high efficiency, high reliability and other characteristics, they are gradually replacing the traditional manual operation and becoming an indispensable part of the manufacturing industry. This article will detail the application scenarios of industrial robots in the field of processing and manufacturing. 2. welding and cutting Welding and cutting is a common process in processing and manufacturing. The traditional welding and cutting process requires manual operation, which is not only labor-intensive, but also prone to occupational diseases. The application of industrial robots in this field can greatly improve production efficiency and product quality. Industrial robots can accurately control welding and cutting parameters, such as welding current and cutting speed, through preset programs, so as to ensure the quality and accuracy of welding and cutting. At the same time, industrial robots can also achieve continuous automated production, greatly improving production efficiency. 3. assembly and handling In manufacturing, assembly and handling is another important link. Traditional assembly and handling requires manual operation, which is not only labor-intensive, but also error-prone. The application of industrial robots in this field can greatly improve production efficiency and product quality. Industrial robots can accurately assemble and carry parts according to preset procedures, thus realizing automatic production. At the same time, industrial robots can also flexibly adjust the production process and assembly sequence according to production needs, thereby improving production efficiency and quality. 4. Inspection and Quality Control In processing and manufacturing, testing and quality control is an important link to ensure product quality. Traditional testing and quality control requires manual operation, which is not only inefficient, but also susceptible to human factors. The application of industrial robots in this field can greatly improve the accuracy and efficiency of detection and quality control. Industrial robots can accurately detect and control the quality of products through advanced technologies such as sensors and vision systems. At the same time, industrial robots can also achieve 24-hour uninterrupted detection, thereby improving production efficiency and quality. In addition, the application of industrial robots can also reduce the cost of manual inspection and quality control and improve the competitiveness of enterprises. 5. automatic loading and unloading system In processing and manufacturing, automatic loading and unloading system is another important field of industrial robot application. The traditional loading and unloading process requires manual operation, which is not only labor-intensive, but also error-prone. The application of automatic loading and unloading system can greatly improve production efficiency and product quality. The automatic loading and unloading system sends the raw materials and finished products to the designated position through the automatic transmission belt or the hanging system, and cooperates with the industrial robot to carry out the loading and unloading operation. This method can not only reduce labor intensity and improve work efficiency, but also reduce production costs and improve product quality. 6. Conclusion In summary, industrial robots have a wide range of applications in the field of processing and manufacturing. From welding and cutting, assembly and handling, testing and quality control to automatic loading and unloading systems, the application of industrial robots is gradually replacing traditional manual operations and becoming an indispensable part of the manufacturing industry. These applications not only improve production efficiency and product quality, but also reduce labor intensity and cost, and bring more economic benefits and market competitiveness to enterprises. With the continuous advancement of technology and the continuous expansion of application fields, the application prospects of industrial robots will be broader.

10-17

Application of laser welding equipment in the manufacture of hardware appliances and auto parts

2023-10-17

With the continuous development of science and technology, laser welding technology, as an advanced manufacturing process, has been widely used in the fields of hardware, electrical appliances and auto parts manufacturing. Laser welding equipment has brought revolutionary changes to the production of these industries with its high precision, high speed and high efficiency. Application of 1. laser welding equipment in hardware and electrical appliance manufacturing 1.1 background introduction Hardware and electrical appliance manufacturing is a highly competitive and diversified industry with a wide range of products, including home appliances, consumer electronics, and industrial equipment. With the continuous improvement of consumer requirements for product quality and performance, the requirements of manufacturers for welding processes are gradually increasing. Application of 1.2 laser welding equipment In the manufacture of hardware and electrical appliances, laser welding equipment is mainly used in the following aspects: (1) Microelectronic device welding: Microelectronic devices have the characteristics of small size, high precision, and light weight. Traditional welding methods are often difficult to meet their manufacturing requirements. Laser welding equipment can achieve high-precision, non-contact welding, greatly improving the manufacturing efficiency and product quality of microelectronic devices. (2) Welding of household appliances: Household appliances such as refrigerators, washing machines, air conditioners, etc., have high requirements for welding quality and production efficiency. Laser welding equipment can achieve high-speed, high-precision welding, improve production efficiency, while reducing the labor intensity of workers, reduce the impact on the environment. (3) Industrial equipment welding: Industrial equipment, such as metallurgical equipment, mining equipment, etc., often need to bear high load and impact force, and the requirements for welding quality are very high. Laser welding equipment can achieve high-strength, high-stability welding, improve the durability and safety of equipment. Application of 2. laser welding equipment in auto parts manufacturing 2.1 background introduction Auto parts manufacturing is an important link in the automotive industry chain, involving a wide range of parts, such as engines, brake systems, chassis and so on. With the development of the automobile industry, the manufacturing quality and production efficiency of auto parts are becoming more and more important to the automobile industry. Application of 2.2 laser welding equipment In the manufacture of auto parts, laser welding equipment is mainly used in the following aspects: (1) Engine manufacturing: The engine is the core component of the car, and it has high requirements for welding quality and production efficiency. Laser welding equipment can achieve high-precision, high-speed welding, improve production efficiency, reduce labor intensity, reduce welding deformation and residual stress, and improve engine performance and reliability. (2) Brake system manufacturing: The brake system is a key component of automobile safety, and has high requirements for welding quality and safety. Laser welding equipment can achieve high-strength, high-stability welding, improve the durability and safety of the brake system. (3) Chassis manufacturing: The chassis is the supporting part of the car, which needs to withstand high load and impact, and has high requirements for welding quality and stability. Laser welding equipment can achieve high-strength, high-stability welding, improve the durability and safety of the chassis. Conclusion: The application of laser welding equipment in the fields of hardware and electrical appliances and auto parts manufacturing is changing the production mode and competition pattern of these industries. With the continuous development of science and technology, laser welding technology will continue to innovate and improve, providing a more powerful driving force for the sustainable development of these industries.

10-15

Application of Laser Welding in Automobile Industry

2023-10-15

Advantages of laser welding technology Laser welding technology is an efficient, accurate and non-polluting welding method, which has the advantages of high weld quality, low cost and high production efficiency. Application fields of laser welding in automobile manufacturing Laser welding technology is widely used in automobile manufacturing, including body manufacturing, engine manufacturing and parts manufacturing. Application of laser welding in automobile body manufacturing Laser welding technology can achieve the advantages of high-strength connection and reduce material waste in automobile body manufacturing, and at the same time can improve the overall structural rigidity and safety performance. Application of Laser Welding in Automobile Engine Manufacturing Laser welding technology can achieve more refined and complicated assembly methods in automobile engine manufacturing, while also improving the overall performance and durability of the engine. Application of laser welding in automobile parts manufacturing In addition to the above two fields, laser welding technology is also widely used in the field of auto parts manufacturing, such as wheels, exhaust pipes and other parts. Improvement of Production Efficiency and Quality of Automobile Industry by Laser Welding Technology Through the use of advanced science and technology-deep learning model for intelligent control, the production efficiency is greatly improved and the labor cost is reduced under the premise of ensuring the stability of product quality. These are the traditional manual operation can not be compared. When the intelligent control system is used for automatic operation, the number of manpower required is greatly reduced, and the production efficiency is significantly improved. Therefore, intelligent management also brings convenience to production. Development trend of laser welding technology in automobile industry in the future In the future, with the continuous progress of science and technology and the changing market demand, intelligent control will be more perfect, and based on the deep learning model and the Internet of things will be more closely integrated. All these will bring us more successful cases of digital transformation relying on advanced science and technology. In the future, the combination of intelligent control and Internet of Things will bring changes to the welding industry and help the rise of the digital economy in the new era.

10-10

304 stainless steel will rust after welding?

2023-10-10

In addition to iron, the composition of 304 stainless steel includes chromium, nickel, aluminum, silicon, etc. Scientists have found that the more uniform the internal structure of the steel, the more closely the various components are linked, the more difficult it is for corrosion to invade, and the content of alloying elements, generally speaking, the content of chromium in 10.5% steel is not easy to rust. The higher the content of chromium nickel, the better the corrosion resistance. For example, the content of nickel in 304 materials is 8-10%, and the content of chromium reaches 18-20%. Such 304 stainless steel will not rust after welding. In addition, a layer of oxide protective film is attached to the surface, just like putting armor on steel, it is naturally not easy to rust. Stainless steel is formed on the surface of a very thin and strong fine stable chromium-rich oxide film (protective film), to prevent oxygen atoms continue to penetrate, continue to oxidize, and obtain the ability to resist corrosion. But there is some reason, this film is constantly destroyed, the air or liquid and oxygen atoms will continue to penetrate or metal iron atoms continue to segregate out, the formation of loose iron oxide, the metal surface is also subject to constant corrosion. There are many forms of damage to this surface film, and the most common ones are as follows: 1, stainless steel surface storage containing other metal elements of dust or heterogeneous metal particles of the attachment, in the humid air, the attachment and stainless steel between the condensate, the two into a micro battery, triggered the electrochemical reaction, the protective film is damaged, called electrochemical corrosion. 2, stainless steel surface adhesion of organic juice (such as melons and vegetables, noodle soup phlegm, etc.), in the case of water and oxygen, constitute organic acid, long time to form organic acid on the metal surface corrosion. 3, stainless steel surface adhesion containing acid, alkali, salt substances (such as the decoration of the wall of alkaline water, lime water spray) caused by local corrosion. The welding process of stainless steel welding manufacturers will also affect the corrosion resistance of stainless steel. Stainless steel processing plants with good welding technology, advanced equipment and advanced technology can be guaranteed in the control of alloy elements, the removal of impurities and the control of billet cooling temperature. Welding stainless steel products has rich experience and advanced equipment, while some small steel mills have backward equipment and backward technology. In the smelting process, impurities cannot be removed, and the products produced will inevitably rust. Therefore, from the material itself, 304 stainless steel will not rust, but because it needs to be processed, whether it will rust or not depends on the smelting technology of the processing plant. Try to choose a large processing plant with advanced equipment and good welding technology.

10-09

Process Specification for Welding processing

2023-10-09

一、概述 焊接加工是一种常见的金属加工方法，广泛应用于制造业、建筑业和维修业。通过将两个或多个金属部件通过高温熔融结合，焊接可以形成牢固的接头，满足各种使用要求。为了确保焊接质量，规范化的工艺流程是至关重要的。以下将详细介绍焊接加工的工艺规范。 二、材料选择 选择合适的焊接材料是工艺规范的第一步。根据被焊金属的材质和性能，选择适当的焊条、焊丝、焊剂等焊接材料，以确保焊接质量。 三、坡口准备 坡口是焊接接头的预处理部分，用于金属的融合。坡口的形状和尺寸对焊接质量有重要影响。正确的坡口形状和尺寸可以确保焊接时金属流动顺畅，提高接头质量。 四、定位焊 定位焊是在焊接开始前，在待焊部位进行临时固定的过程。定位焊的位置和压力要适当，确保金属在高温下能够顺利融合。 五、焊接电流和电压 焊接电流和电压是焊接时的关键参数，直接影响焊接效果。根据被焊材料的材质、厚度和坡口形状，选择适当的电流和电压，以保证焊缝的强度和质量。 六、焊接速度 焊接速度是指焊接时电弧燃烧的速度。适当的焊接速度可以保证金属在高温下充分熔化，同时避免过热和烧损。 七、焊接角度 焊接角度是指电弧燃烧时与坡口表面的夹角。正确的焊接角度可以保证电弧热量集中，提高熔敷速度，同时避免烧损金属表面。 八、层间清理 在焊接过程中，每层焊缝的表面可能存在杂质或熔渣，需要仔细清理。否则会影响焊缝质量，甚至导致气孔、夹渣等缺陷。 九、焊缝检查 完成焊接后，应对焊缝进行仔细检查，包括外观检查和无损检测（如X光、超声波等）。确保焊缝无缺陷，满足使用要求。 十、焊后处理 焊后处理包括锤击焊缝、热处理、保温等步骤，用于改善焊缝组织和性能。根据具体情况，选择适当的焊后处理方法。 十一、安全规范 在焊接过程中，必须严格遵守安全规范，包括穿戴适当的防护服、佩戴防护眼镜、处理高温熔渣等。此外，应远离易燃、易爆物品，确保工作区域的安全。 十二、环保规范 焊接产生的烟尘和有害气体对环境和人体健康有害，因此应遵守环保规范。采用通风设备、净化装置等措施，减少有害物质排放。 总结 以上就是关于焊接加工的工艺规范。遵循这些规范，可以确保焊接质量，提高工作效率，同时保护环境和员工健康。在实际操作中，应根据具体情况进行调整和优化，以满足特定要求。希望本文的内容能对大家有所帮助。

10-08

What should be paid attention to in the welder operation specification of stainless steel welding parts?

2023-10-08

Welding is a process that connects metals together and is widely used in manufacturing, construction, and maintenance. Stainless steel is a common Welding materials, which has the characteristics of corrosion resistance and beautiful appearance. In order to ensure the quality and safety of welding, welders must comply with certain operating specifications. This article will introduce the importance and significance of the welder's operating specifications for stainless steel weldments, as well as the methods and precautions for implementing the specifications. Before welding, preparation is essential. First, make sure that the weldment meets the specifications, including thickness, width, length, etc. Secondly, it is very important to choose the right electrode and current. The electrode is a material used to connect metals during welding. It is necessary to select the appropriate electrode according to the type and thickness of the metal. Current is the energy source used to melt the electrode and metal in the welding process. Too large or too small current will affect the welding quality. Therefore, the welder should carefully check the specifications of the welding parts and electrodes before welding, and select the appropriate current. The welding process includes multiple steps, and there are many matters needing attention. First of all, clamping and positioning are very important. Clamping is the method used to fix the weldment, and positioning is to determine the position of the weldment. Correct clamping and positioning can ensure that the metal will not move or deform during the welding process. Secondly, the core is the most important part of the welding process. The welding core is the part that combines the welding rod and the metal after melting, and its quality and stability need to be guaranteed. In addition, the shielding gas is also essential in the welding process. The shielding gas can prevent the metal from being oxidized during the welding process, thereby improving the welding quality. In the welding process, welders need to pay attention to many things. First of all, explosion protection is very important. High temperature and high pressure will be generated during the welding process, which may cause explosion if not handled properly. Therefore, welders should avoid excessive heat or impact on the metal during operation. Fire prevention is also essential. Sparks and high temperatures generated during the welding process may cause a fire. Therefore, welders should take measures to prevent fire, such as setting fire barriers, using fire extinguishers, etc. Moisture is also important. The humid environment may cause the electrode and the metal surface to oxidize, thereby affecting the welding quality. Therefore, welders should avoid welding in a humid environment during operation. After the welding is completed, a quality inspection is required. Quality inspection is an important link to ensure the quality of welding, including visual inspection and non-destructive testing. Visual inspection is to check whether there are defects in welded parts, such as undercut, air holes, etc. Non-destructive testing is to detect the quality of the welding parts through certain methods, such as X-ray testing, ultrasonic testing and so on. If quality problems are found, trimming or re-welding is required. In short, stainless steel weldment welder operation specification is a necessary condition to ensure welding quality and safety. Welders must strictly abide by the operating specifications, carefully implement every step and precautions to ensure welding quality and safety. Whether it is preparation work, welding process or quality inspection, it needs to be strictly controlled and checked. Only in this way can we produce high-quality stainless steel welding parts and provide reliable guarantee for industrial production and construction. Therefore, we should pay attention to the importance of stainless steel welder operation specification, and remind the majority of welders in the operation must be careful and meticulous, to ensure that every link is in line with the specification requirements.

07-10

The characteristics of vacuum brazing technology can be rapidly developed and applied

2023-07-10

Vacuum brazing technology can be rapidly developed and applied, mainly because it has a series of advantages compared with other brazing methods: ① In the process of vacuum brazing, the workpiece to be brazed is under vacuum conditions, and there will be no oxidation, carburization, decarburization, pollution and deterioration. The cleanliness of the welded joint is good and the strength is high. When brazing, the brazing temperature is lower than the melting point of the base metal, which has little influence on the base material, the whole part is heated evenly, the thermal stress is small, and the deformation can be controlled to a minimum, which is especially suitable for brazing of precision products. The low pressure around the base metal and the brazing filler metal can eliminate the volatile gas and impurities released by the metal at the brazing temperature, which can improve the performance of the base metal. Because no flux, so there will be no pores, impurities and other defects, improve the corrosion resistance of the base metal, avoid pollution, can save the process of cleaning residual flux after brazing, save time, improve working conditions, no pollution to the environment. ⑤ The workpiece heat treatment process can be completed at the same time in the brazing process, select the appropriate welding process parameters, but also the brazing arrangement for the final process, and get the performance of the brazed joints in line with the design requirements. ⑥ It can braze multiple adjacent brazing seams at one time, or braze multiple components in the same furnace, with high brazing efficiency. There are many kinds of metals that can be brazed, especially suitable for brazing aluminum and aluminum alloy, titanium and titanium alloy, stainless steel, high temperature alloy, etc. Also suitable for titanium, zirconium, niobium, molybdenum, tungsten equivalent or dissimilar metal brazing connection. Vacuum brazing is also suitable for composite materials, ceramics, graphite, glass, diamond and other materials. ⑧ The design approach of the product is broadened, and the components with narrow grooves, extremely small transition tables, blind holes, closed containers and parts with complex shapes can be brazed without considering corrosion, cleaning, damage and other problems caused by flux, etc. (3) Disadvantages of vacuum welding ① Under vacuum conditions, the metal is volatile, so it is not easy to apply vacuum brazing to metals and brazing materials containing volatile elements. If it is really necessary to use, special process measures should be adopted. ② Vacuum brazing is sensitive to the surface roughness, assembly quality and fit tolerance of the parts before brazing, and has high requirements for the working environment. The vacuum brazing equipment one-time investment, high maintenance costs.