02-16

What welding rods are commonly used for welding copper pipes and iron pipes

2023-02-16

Fusion welding material What welding rods are commonly used for welding copper pipes and iron pipes What kind of welding wire and electrode is used for welding copper pipes depends on the size, structure, size and welding requirements of copper pipes: 1., if small-diameter copper pipes are generally limited to a diameter of less than 20mm, we can choose flame brazing or high-frequency brazing welding, then according to the requirements of brazing, there are the following kinds of welding wires and electrodes. 1) regular can be welded with phosphor copper such as welding electrodes with low requirements for frequency vibration, the heating method is flame welding, which is self-brazing for copper pipes, does not need auxiliary flux welding, and has a relatively low melting point, but has strong brittleness. 2) If the strength requirement is higher, the permeability is slightly stronger, and the melting point is close to the silver-containing welding wire, the welding material has better permeability, stronger fluidity and wettability, and higher quality. 3) If there are some requirements for strength and toughness, brass gas welding wire with slightly higher temperature, such as Viodin's welding wire, can be used, but red copper needs to be welded with copper solder paste Viodin-F flux paste. 4) If the strength requirement is higher, high temperature brazing filler metal can be selected, because the welding rod itself is coated with medicine, so welding copper does not need auxiliary flux welding. If the 2. is a large-diameter copper pipe, which is generally more than 20mm and the wall thickness is more than 1mm, it is difficult to master the uniformity of temperature by brazing heating at this time, then welding can be adopted, and according to the welding material, it can be subdivided into welded red copper pipe, as well as welding of red copper pipe and iron pipe, red copper pipe and stainless steel pipe. 1) If it is pure copper large tube welding, welding wire welding can be selected, such as red copper argon arc welding wire, DC argon arc welding, welding wire specifications can be selected according to the wall thickness of red copper. 2) If the red copper pipe is welded to the iron pipe, or the red copper pipe is welded to the stainless steel pipe, the brass argon arc welding wire of Weiodin, which is suitable for welding dissimilar copper metals, can be selected. At this time, the welding is protected by high purity argon, which is biased towards the copper side. Combining the above two types, the appropriate welding wire and electrode can be selected. In short, brazing must be as uniform as possible in temperature. If welding is used, welding wire and welding material with good weldability and corresponding welding wire must be selected.

02-15

Cold welding machine and laser welding machine which is good?

2023-02-15

Laser welding machine cold welding machine and laser welding machine which is good? Cold welding machine and laser welding machine have their own advantages. The penetration depth of cold welding machine is better than that of laser, the thickness of repair welding is relatively thick, and the operation position is relatively flexible, but the temperature is higher than that of laser. For deformation control and welding of precision parts, laser welding is not a substitute for cold welding machine. automatic laser welding machine Automatic laser welding machine is also often called laser welding machine, energy negative feedback laser welding machine, laser welding machine, laser welding machine, laser cold welding machine, laser argon welding machine, laser welding equipment, etc. According to its working mode, it can be divided into laser mold welding machine (manual laser welding equipment), automatic laser welding machine, jewelry laser welding machine, laser spot welding machine, optical fiber transmission laser welding machine, galvanometer welding machine, hand-held welding machine, etc. Special laser welding equipment includes sensor welding machine, silicon steel sheet laser welding equipment and keyboard laser welding equipment. Working principle Laser welding is the use of high-energy laser pulses to heat the material locally in a small area, and the energy of the laser radiation is diffused to the inside of the material through heat conduction, and the material is melted to form a specific molten pool. It is a new type of welding method, mainly for the welding of thin-walled materials and precision parts. It can realize spot welding, butt welding, overlap welding, seal welding, etc., with high depth-to-width ratio, small weld width, small heat-affected zone, and deformation Small, fast welding speed, smooth and beautiful welds. After welding, no need to deal with or just simple treatment, high quality weld, no pores, can be precisely controlled, small focus spot, high positioning accuracy, easy to realize automation. How to choose a laser welding machine At present, because the laser welding machine has basically replaced the traditional welding process, the market space is very large, many companies previously engaged in the laser industry have joined, even across the line to join, because not professional, so in the laser welding machine production process is difficult to reach the production level of professional laser welding company. On the other hand, due to the fierce market competition, small workshops do not have technical and financial support, so many will reduce the price, which will cause the reduction of the quality of product accessories, and there is no professional technical personnel, after-sales service is also difficult to serve customers in a timely manner, or even do not serve, can not meet the psychological expectations of customers, so that customers are extremely disappointed! If you have a demand for laser welding machine, you should choose a company specializing in the production of laser welding machine. What is professional? We can generally consider from the following aspects: 1, to choose a strong laser welding machine manufacturers, at least engaged in laser welding machine industry for more than ten years; 2. Product price comparison, it is recommended to pay attention to some domestic standardized laser product manufacturers, which have a good reputation, are technically mature, and have a rich variety of products. Not only can provide excellent performance of the product equipment, the price is also in the middle; Generally, when choosing a manufacturer, it is necessary to consider whether its after-sales service is comprehensive, because the pros and cons of after-sales service will directly affect the satisfaction of consumers. When choosing a laser welding machine manufacturer, the warranty and after-sales service of the laser welding machine can guarantee the rights and interests of consumers, and there will be no guarantee after buying it. Therefore, high-quality after-sales service can be regarded as an important reference standard in the process of selecting manufacturers. 4. If the scale of the company is not too far away, you can request to visit the factory. The strength of the company can be judged by the size of the company. Through the above points, we can choose our own satisfactory manufacturers, in the later use of the process, there will be no after-sales worries. Jinan multi-dimensional photoelectric equipment Co., Ltd. was established in, 13 years of wind and rain, from only a dozen square meters of factory building, to now has a square meter production workshop, more than 10 technical backbone, 7*24 hours after-sales service team, technical service centers in many provinces and cities, and sales channels in more than 60 countries around the world. At present, the company involves exclusive research and development of mini small laser welding machine, large ultra-high power laser cutting machine, large fiber laser pipe cutting machine, laser plate and tube integrated machine, laser engraving machine and so on.

02-14

Relationship between power, frequency and pulse width of laser welding machine

2023-02-14

Frequency of laser welding Relationship between power, frequency and pulse width of Yag laser welding machine Single point energy = pulse width * peak power The laser welding machine shall weld two pieces of stainless steel from 2mm to 3mm together, and consult the pulse width, frequency and current parameter settings. It is very rare to weld 2MM and 3MM stainless steel through. The energy is too small. Hello, I don't know how you use this laser. I also use it in our factory now. I still don't understand some places. I wonder if I can ask you if I have done it in a large family of lasers. Why don't you directly find Chutian's after-sales or technology for this problem? They don't care? Fiber marking, parameter setting, laser welding machine, parameter setting! Equipment model: HF- Laser power: Laser wavelength: Beam quality M2:1.0~1.1 Repetition rate: 20- Maximum line speed:/s Engraving range: ≤ * (larger size can be customized) Minimum line width: 0. Minimum character: 0.1mm Power consumption: Cooling method: air cooling Power demand:/ Widely used in: mobile phone manufacturing industry, badge electronics, automotive industry, medical equipment, watches, hardware, jewelry, sanitary ware, etc. What is the relationship between the power of the laser welding machine and the parameters? Laser peak power: the instantaneous power of the laser in the actual light., The laser peak power is equal to the average power divided by the duty cycle. It is generally on the order of several kilowatts. Laser pulse energy: refers to the energy output by a single pulse. It is determined by the energy storage capacitor capacity, voltage and xenon lamp. This is an important indicator. When spot welding, the stability of single point energy has a great influence on the quality of welding. Pulse width: The time of a single pulse. Pulse frequency: the number of laser pulses repeated per second. Examples: Pulse width = 5ms Frequency =/20 = Peak power = 1KW Average power = 1 × 5 ÷ 20 =

02-13

Frequency and voltage of high frequency induction welding machine

2023-02-13

Induction welding machine What is the frequency and voltage of the high frequency induction welding machine High frequency induction welding machine voltage and frequency: medium frequency (30-), high frequency (50-), ultra high frequency (-). What product do you want to weld? Why there are pores when welding spectacle frames with high frequency induction welding machine The temperature of the copper-phosphorus-tin solder is certainly not much different from the melting temperature of brass, and the porosity is mainly due to the volatile metal elements in the material, such as zinc, phosphorus, manganese, etc. In addition, control the welding temperature, try not to overheat. The last technique is to choose a good one and coat more flux on the surface of the welding ring. How to weld high frequency induction heating equipment The high-performance heating power supply with new high-power power electronic device ICBT and lock collar technology has a power factor close to 1 and a maximum power of up to, which can completely replace the high-energy-consuming electronic tube super audio power supply, machine-type intermediate frequency power supply and fine-brake tube heating power supply. . High-frequency induction heating welding equipment can instantly heat metal objects to any temperature required, including their melting point; It can also heat metal objects locally.. 2. High frequency induction heating welding equipment high efficiency and energy saving Energy saving of the whole machine The efficiency of the whole machine ≥ 95%, saving 30-40% than electronic tube equipment High power, suitable for automatic production line electronic control and monitoring hole protection system perfect and reliable can be frequently started, start success rate% output constant power, constant voltage, constant current load adaptation range Easy adjustment. 3. High frequency induction heating welding equipment is widely used in metal glasses manufacturing industry, connector welding in electrical and electronic industry, connector welding in electrical and electronic industry, non-contact welding in small relay, high voltage welding in refrigeration industry, because it has small size, light weight, low failure rate, energy saving, firm, beautiful and exquisite welding point, unlimited geometry of welded parts, no damage to surface pattern, no damage to metal internal crystal structure, no obvious welding scar, jewelry industry between the various components of the welding and metal jewelry and metal process manufacturing welding. The same is the heating welding of high-frequency induction heating welding equipment is the way of heating welding revolution.

02-12

Principle of high frequency induction soldering station

2023-02-12

Principle of induction welding Principle of high frequency welding station High frequency welding station principle, high frequency welding high frequency current of the two major effects of the content is: Skin effect-a physical phenomenon in which the current distribution on the conductor section is uneven, the current density gradually increases from the center of the conductor to the surface, and most of the current flows only along the surface of the conductor. The lower the resistivity of the conductor, the higher the permeability, and the higher the frequency of the current, the more significant the skin effect. Proximity effect-when high-frequency currents flow in two conductors in opposite directions to each other or in a reciprocating conductor, a special physical phenomenon in which the current is concentrated on the adjacent sides of the conductor. High frequency welding usually uses the current frequency range of ~, sometimes also uses the low frequency. [1] High frequency welding is divided into high frequency resistance welding and high frequency induction welding. ① High-frequency resistance welding: Use rollers or contacts as electrodes to introduce high-frequency current into the workpiece. It is suitable for continuous longitudinal seam butt welding and spiral lap seam welding of pipes, welding of boiler fin tubes and heat exchanger spiral fins. The outer diameter of the weldable pipe is mm, the wall thickness is 16mm, and the thickness of the I-beam is 9.5mm, with high productivity. ② High-frequency induction welding: The workpiece is heated by an induction coil to weld small-diameter pipes with an outer diameter of 9mm and thin-walled pipes with a wall thickness of 1mm. It is often used for longitudinal seam welding of small and medium-diameter steel pipes and brass pipes, and can also be used for circumferential seam welding, but the power loss is larger than that of high-frequency resistance welding. The main parameters that affect the quality of high-frequency welding are the frequency of the high-frequency power supply, power, workpiece forming angle, extrusion force, the distance between the electrode (or induction ring) and the extrusion roller, and welding speed. The main equipment includes high-frequency power supply, workpiece forming equipment and extrusion machinery. High frequency welding has stable quality, high productivity and low cost. It is suitable for high-efficiency automatic production line and is an advanced method for producing seamed pipes. [3] High frequency welding has the following characteristics: 1, because the current is highly concentrated in the welding zone, the heating speed is extremely fast, so the welding speed can be as high as ~/min. 2. Due to the fast welding speed and the strong self-cooling effect of the weldment, not only the heat affected zone is small, but also the oxidation is not easy to occur, so the organization and performance of the weld are very excellent. 3. The surface of the weldment can not be cleaned before welding, thus improving the efficiency. 4. There are many kinds of metals that can be welded, and there are many shapes and specifications of products.

02-11

What characteristics of laser are used in laser welding

2023-02-11

Principle of laser welding What characteristics of laser are used in laser welding Steam, under the reaction force generated when the steam exits the surface, causes the molten metal liquid to crowd out to the surroundings to form pits. As the laser continues to irradiate, the pits penetrate deeper. When the laser stops irradiating, the melt around the pits returns, and the two weldments are cooled and solidified. Welding in-up. These two welding mechanism according to the actual material properties and welding needs to choose, by adjusting the laser welding process parameters to obtain different welding mechanism. The most basic difference between the two methods is that the surface of the former molten pool remains closed, while the latter The molten pool is then penetrated by the laser beam into a hole. Conduction welding has less disturbance to the system, because the radiation of the laser beam does not penetrate the material to be welded, so the weld is not easy to be invaded by gas during conduction welding. However, during deep penetration welding, the continuous closure of small holes can lead to pores. Conduction welding and The deep penetration welding mode can also be converted into each other in the same welding process, and the transition from conduction mode to keyhole mode depends on the peak laser energy density and laser pulse duration applied to the workpiece. The time dependence of laser? ‰ impulse energy density enables laser welding in During the interaction between the laser and the material, it changes from one welding method to another, that is, in the process of interaction, the weld can be formed under the conduction mode first, and then changed into the small hole mode. Schematic diagram of laser welding Laser welding is the use of high-energy laser pulses to heat the material locally in a small area, and the energy of the laser radiation is diffused to the inside of the material through heat conduction, and the material is melted to form a specific molten pool. What is the principle of laser welding technology? Laser welding technology mainly uses a parabolic mirror or a convex lens to collect the surrounding heat. At this time, the laser is a high-temperature heat source, which is applied to the surface of the workpiece joint and can play a role in welding. According to the different workpieces, the way of laser welding is also different. The commonly used laser welding methods are conduction welding and small hole welding. In the aerospace industry, laser welding technology is often used to repair workpieces; in the field of automobile manufacturing, laser welding technology is widely used in the manufacture of radiators, transmission shafts and other parts. With the continuous development of laser processing technology, the application field of laser welding technology will inevitably expand. 2.3 Friction Stir Welding Technology Friction stir welding technology, as the name implies, is to use the heat generated by friction to weld, which determines its scope of use, that is, low melting point metal welding. This welding technology has a higher level of automation, better joint quality and stability, and energy saving and low carbon. In the process of friction stir welding, a stirring needle will be inserted into the weld, and the metal will be heated by friction to make it present a plastic state. At the same time, the metal will form a rotating cavity. As the stirring needle moves forward, the cavity and plastic will rotate. The 62-shaped metal moves in opposite directions. After the metal cools, the welding gap density will be higher. Stir welding technology is mainly used in shipbuilding, aerospace, construction, transportation and other fields. In the shipbuilding industry, it is mainly used to weld components on the deck and on the bow; in the aerospace industry, it is used in the fuselage and fuel tanks of airplanes; and in the field of transportation, the bodies and exchangers of trains, high-speed trains, etc. Friction stir welding dry season technology is used. 2.4 electroslag welding technology Electroslag welding technology is a kind of welding technology using resistance heat. It can weld steel, iron-based metal and other thick workpieces at one time, and the production cost is low and the welding quality is high. The principle of electroslag welding technology is based on the principle that the electric heating group is used as a heat source to melt metal and wood, and then cooled and solidified to connect the metal atoms to each other. Commonly used electroslag welding technology mainly includes melting nozzle, non-melting nozzle electroslag welding technology, wire electrode electroslag welding technology, plate-level electroslag welding technology, etc. Electroslag welding technology is mainly used in some special places or industries, such as the welding of railway stations; welding of thick-walled containers such as blast furnace shells and so on. 2.5 plasma arc welding technology Plasma arc welding technology is a new welding technology based on plasma arc cutting industry. It is a more sophisticated welding technology. Plasma arc welding technology should be accurately said to be "compression arc welding", it is the welding torch to maximize the compression of the entire arc, to promote the plasma effect is intensified, after the arc becomes a stable, unidirectional powerful jet heat source, the temperature is as high as ~, and then can be directly welded metal. Usually, the plasma arc commonly used by enterprises is mainly transferred and non-transferred.

02-10

What is the principle of laser welding?

2023-02-10

Laser welding What is the principle of laser welding? Laser welding is the use of high-energy laser pulses to heat the material locally in a small area, and the energy of the laser radiation is diffused to the inside of the material through heat conduction, and the material is melted to form a specific molten pool. It is a new type of welding method. Laser welding is mainly aimed at the welding of thin-walled materials and precision parts. It can realize spot welding, butt welding, lap welding, seal welding, etc., with high aspect ratio, small weld width, small heat affected zone, small deformation, fast welding speed, smooth and beautiful weld seam, no need or simple treatment after welding, high weld quality, no pores, and precise control, the focus spot is small, the positioning accuracy is high, and it is easy to realize automation. Laser welding is an efficient and precise welding method using a laser beam with high energy density as a heat source. Laser welding is one of the important aspects of laser material processing technology. In the 1970 s, it was mainly used for welding thin-walled materials and low-speed welding. The welding process was heat conduction type, that is, the surface of the workpiece was heated by laser radiation, and the surface heat was diffused to the inside through heat conduction. By controlling the width, energy, peak power and repetition frequency of the laser pulse, the workpiece was melted and a specific molten pool was formed. Because of its unique advantages, it has been successfully applied to the precision welding of micro and small parts. China's laser welding is at the world's advanced level. It has the technology and ability to use laser to form more than 12 square meters of complex titanium alloy components, and has invested in the prototype and product manufacturing of many domestic aviation research projects. In October, China's welding experts won the highest academic award in the field of welding-Brook Award, China's laser welding level has been recognized by the world.

02-09

What is the principle of high frequency induction welding machine?

2023-02-09

Induction welding What are the uses of high frequency induction welding machine? What is the principle of high frequency induction welding machine? High frequency welding machine can be used for welding of various metal materials, and can also be used for diathermy, melting, heat treatment and other processes. Welding is just one of its many uses. Introduction to Induction Brazing Induction welding has low requirements for human operation, controllable welding process, good welding quality and good consistency. The advantages of high frequency welding for single batch products are obvious. High frequency welding can be used for all kinds of diamond drill bit welding, all kinds of hard alloy cutter head, saw blade welding, all kinds of pick bit, drill pipe, coal mine drill bit, air drill bit and other mining machinery accessories welding. Welding of air conditioning and refrigeration accessories such as: high-frequency brazing of public security gold such as pipe joints, distributors, distributor tail pipes, sight mirrors, four-way valve end covers, flute pipes, liquid storage bottles, drying bottles, stop valves, etc. Welding of automobile air-conditioning refrigeration accessories: such as high-frequency brazing of evaporator lead-out pipe, single-tube pressure plate, double-tube pressure plate, air-conditioning pipeline, visual mirror, parallel flow microchannel flat tube joint, aluminum distributor and other accessories. New energy vehicle power battery pack cooling system in the water cooling belt joint welding, cold plate and other accessories welding When an alternating current is passed, an alternating magnetic field is generated in and around the coil. During induction heating, the part is subjected to this alternating magnetic field. According to the theory of electromagnetic field, the changing magnetic field will produce induced electromotive force, which will form a closed surface of the part. This current is usually called eddy current. Induction heating is mainly generated by eddy current in the workpiece, so that the workpiece is heated. (Since it is not clear whether the current of the induction coil increases or decreases, the default is to plot according to the increase) The two magnetic fields involved in Lenz's law, one is the magnetic field generated by the induced current of the heating coil (called the induced magnetic field), and the other is the induced magnetic field. The magnetic field of the induced current (called the original magnetic field), according to Lenz's law, the magnetic field generated by the induced current always hinders the change of the magnetic flux of the original magnetic field. (This refers to the induction intensity, not the magnetic flux area). If the magnetic flux of the induction current of the heating coil is increased or tends to increase. Potential, it can be judged that the induced magnetic field is to the left. According to Lenz's law, to hinder the increase of magnetic flux, the magnetic field causing induced current should be in phase with it. In the opposite direction, I .e. to the right, and then according to the right-hand ampere rule, the direction of the rotating current is obtained.

02-08

Induction Brazing Methods and Applications

2023-02-08

Induction welding Induction Brazing Methods and Applications When induction brazing, the brazing part of the part is placed in an alternating magnetic field, and the heating of this part of the base metal is realized by the resistance heat of the induced current generated in the alternating magnetic field. The higher the frequency, the smaller the depth of current penetration, although the rapid heating of the surface, but the thinner the thickness of the heating, the internal parts can only rely on the surface layer to the internal heat conduction to heat, this is the so-called skin effect. It can be seen that the choice of high AC frequency is not beneficial, generally around the frequency is more appropriate. In addition, the skin effect is also related to the resistivity and permeability of the material, the greater the resistivity, the smaller the permeability, the weaker the skin effect, and the more significant the skin effect. The induction coil is an important component of induction brazing equipment. The basic principle of correct design and selection of induction coils is to ensure rapid, uniform and efficient heating during welding. Usually, the induction coil is made of pure copper tube. When working, the tube is cooled by water. The thickness of the tube wall should be less than the current penetration depth, generally 1~1.5mm. The gap between the induction coil and the weldment should be kept to avoid short circuit, but in order to improve the heating efficiency, the gap between the induction coil turns and the weldment should be minimized. Induction brazing often requires some auxiliary tools to clamp and position the weldment, in the design of the fixture should be noted that the clamp parts adjacent to the induction coil should not use metal, so as not to be induction heated. When induction brazing, foil, wire, powder and paste solder can be used. The solder should not form a closed ring, and the solder and gas medium can be used to remove the film. Induction brazing is widely used for brazing steel, copper and copper alloys, stainless steel, high-temperature alloys and other weldments with symmetrical shapes. It is especially suitable for pipe fitting, pipe and flange, shaft and shaft sleeve, turning tool cutter head sawtooth welding. For brazing of aluminum alloy, induction brazing can also be used, but the temperature control requirements are relatively high.

02-07

"Welding Mulan" female welder story

2023-02-07

Female Welder A little sister in Hunan was praised by foreign media as "Hua Mulan of Electric Welding". What stories do you know about this little sister? The little sister's name is Yi Ran. Her father is a worker. When she first came into contact with a welder, she was still welding by hand. When she was just studying, she was burned by welding slag, but she did not give up. Practice welding skills. I took part in the German welding competition in, although I didn't get the place, but the female welder was very rare, and the German organizers still gave her a big gift. She also became a national model woman. I know the story of this little sister. She went to Germany to participate in the international welding competition, then she was a female welder, and then she won the highest special award. At that time, when the little sister chose this major, the family did not agree, but she still did not give up, and now she will become such a powerful person. This little sister is the first visually impaired female model in China. She has been on the same stage with the famous model and designer Ma Yanli, and has won many awards. She is a new star in the modeling industry. There are many reports on her on TV and newspapers. Show. These stories are that she is the only female welder. She won the highest special award in the competition. Because she is very infatuated with electric welding, she will learn this industry. The media also gave her the title of Magnolia. Her father is also a worker. She also participated in the international electric welding competition held in Germany, and also won the first place in the group. She also led the team to trial-produce more than 20 new types of high-speed first cars, which are very powerful. girls for welders? Of course, argon arc welding, electric welding, riveting and hot melting are also very suitable for women to do, and it is not difficult to take an examination of the qualification certificate. I have two little sisters who are welders and have first-class welding skills. I work in a company and can earn about yuan a month. originally, my husband goes to the talent flow market to find temporary workers, and the daily salary is between-yuan, and most people have daily salary, as soon as I checked out one day, it was very troublesome to manage. Later, I made a job advertisement for my husband on the Internet. The next day, many people contacted me, both men and women. As a result, I chose two female welders for my husband. Because these two women came to the company to apply for the job at the same time, they all performed well in the assessment. My husband left them in the workshop and the canteen, the salary is RMB per day, and you have a meal at noon. If you want to learn welder, there is still room for development.