How To Choose Brazing Material Correctly When Welding Tool Steel And Hard Alloy With High Frequency

It is very important to choose brazing material correctly when using high frequency welding machine. Selecting the right filler metal will not only improve the welding quality of the product, but also often improve the efficiency and save cost. This is more profitable for high frequency welder for sale. Therefore, in welding of the high frequency welding machine, we need to choose the solder properly according to the composition of the product and welding requirements. Liaoning Unify High Frequency Equipment Co.,ltd. is a professional high frequency welding machine manufacturing enterprise, devoted to one model of design, production, high frequency welder for sale, after - sales maintenance and repair.

High frequency welder usually uses pure copper, copper zinc and silver copper solder when welding tool steel and hard alloy. These three filler metals are highly correlated in composition and vary widely in price. Choosing the right filler metal is closely related to the welding cost. We need to analyze and know the advantages and disadvantages of each filler metal and then choose the best one:

Pure copper has good wettability to welding of various kinds of hard alloy high frequency welder but the best effects are obtained by brazing in a hydrogen reducing atmosphere. At the same time, due to the high brazing temperature, the stress in the joint is large, which leads to the increase of crack tendency. The pure copper brazing joint has a shear strength of 150MPa and it is of high plasticity, but is not suitable for high temperature work. Copper zinc solder is the most commonly used brazing filler metal for high frequency welders welding tool steel and carbide. In order to improve the wettability and joint strength of the filler metal, alloying elements such as manganese, nickel and iron are often added in the filler metal for high-frequency welder. The melting point of the silver copper solder is low and the thermal stress produced by the brazing joint of the high frequency brazing machine is small, which is helpful to reduce the cracking of the hard alloy brazing. In order to improve the wettability of the solder and improve the joint strength and working temperature, the alloy elements such as manganese and nickel are often added into the solder. The above three copper - based brazing materials are very common in the application of high frequency welder. But their welding requirements are different, so that choose different copper composition of it. The brazing consumables of high frequency welder are selected reasonably according to welding strength, impact toughness and fatigue strength.

High frequency welder is easy to operate, safe, environmentally friendly and power saving. It is a multi-purpose machine. For enterprises, high frequency welder for sale makes big profits with a small capital.

Liaoning Unify High-Frequency Equipment Co., Ltd. is a renowned Chinese company specializing in R&D and manufacture of HF welding machine, automatic high frequency welding machine, ultrasonic plastic welding equipment and automatic equipment. Please feel free to contact us if you have any further inquiry.

Factors Affecting The Performance Of High Frequency Welding Machine

There are many factors affecting the effective power output of high frequency welder. Therefore, the major high frequency welding machine manufacturers should pay attention in the production of high frequency welder. The effective output power of high-frequency welding machine is mainly affected by the following aspects:

1. Welding V Angle, the most economic and efficient Angle is between 2-3 °. In addition to electromagnetic induction heating, there are two important effects, namely skin effect and proximity effect of main principle of high frequency welding. The smaller the welding V Angle is, the closer the proximity effect will be, so that the effective output power of the welding machine can be used more effectively.

2. The shape of the two welded surfaces of the pipe should be parallel to each other. This will make the welding more efficient and the molecular diffusion between the two surfaces more uniform.

3. Welding temperature. Welding temperature plays a decisive role in the process of welding. If the temperature is too high, the welding surface will melt. If the temperature is too low, there will be false welding, resulting in weak welding. It requires the judgement from experience of an experienced "mold" master in production site. A temperature sensor can be installed at the top of the welding seam to feed the measured temperature directly into the main operating system of the high-frequency welding machine for program analysis to automatically adjust the output power and adjust the temperature of the welding seam.

4. The most critical factor affecting the performance of high frequency welding machine -- induction coil (inductor)

The sensor design should start from the following aspects:

4.1 The diameter of the inductor should be slightly larger than the diameter of the steel pipe, and the shape should be the same as the shape of the steel pipe, such as circle to circle, square to each other, and rectangle to rectangle.

4.2 Cooling of inductor should take full cooling, and uniform cooling into consideration to ensure quick and efficient cooling. Better cooling effect makes it more efficient.

4.3 The shape of the sensor and the distance between the sensor and the steel tube wall determine the output frequency as well as effective output. If the distance is too far, the frequency will be smaller, the magnetic field on the surface of the steel tube will become weaker, the induced current will become smaller, and the effective output power will be very low.

Choosing a well designed sensor is of great significance to ensure equipment stability, improve production efficiency and reduce energy consumption for high frequency welding machine manufacturers.

As the largest energy consuming equipment of high frequency welding machine manufacturers, high frequency welding machine must have the basic characteristics of advanced technology, first-class service, stable performance, high efficiency and energy saving to help high frequency welding machine manufacturers have make a further achievement in sustainable development.

Liaoning Unify High-Frequency Equipment Co., Ltd. is a renowned Chinese company specializing in R&D and manufacture of HF welding machine, high frequency welding pvc and automatic equipment. Please feel free to contact us if you have any further inquiry.

Main Characteristics Of Inflatable Welding Machine

Features of inflatable welding machine:

1. The operation of inflatable welding machine

Inflatable welding machine has two push dials, two work bits. The operator only needs to put the products in it, push the push plate to trigger the micro switch, and the molds go down automatically, heat up, and go up. The whole process is simple and safe with high frequency. Staff can use the machine without special training.

2. Adjustment of output force of inflatable welding machine

It adopts special low loss coaxial oscillator, which can adjust the output force at any time due to the size of the mold and the thickness of the glue. When you operate the inflatable welding machine, it will not cause interference with telecommunication with it. The adjustment of output can also be combined with the time system to maximize output. The heat sealing machine can weld the product in the shortest time and increase the production.

3. Protection device of inflatable welding machine

A: current limiting protection: when the output force regulation is too large, it will cut off the output of high cycle so as to protect the electronic tube in the machine from damage due to excessive current.

B: Spark protection of inflatable welding machine: in the process of work, if the jump fire phenomenon appears in molds, the protector will cut off the output, and the molds will automatically rise to leave the product, so that the mold will not be damaged by the jump fire.

C: Compact processing: in the process of work, the high-cycle output can be stopped at any time and the mold can be returned to the original position.

4. Heat, constant temperature of inflatable welding machine

Inflatable welding machine has high frequency self-heating. The motor also has a 2000W heating element. The thermostat preheats the mold, which reduces the welding time and eliminates flashover.

5. Rising distance of inflatable welding machine

Inflatable welding machine is equipped with a 3-position solenoid valve. It can be used in conjunction with the time system, and can adjust the rising distance of the cylinder at will, so as to reduce the time required for cylinder rollout and recovery and improve the production speed.

The main features of inflatable welding machine: it adopts PLC programming control, and the operation is simple, the production efficiency is high. It has the features of automatic walking, and precise position. There is no need to move the material and machine. One seam at a time. It has seam neat, no wrinkles, and no knife marks. Welding speed is up to 5-10m per minute.

The main application of inflatable welding machine: products are widely used in shoes clothing embossed, inflatable toys, trademarks, bags, shower curtain, carpet, packing bag, hot water bag, car seat cushion, sporting goods, plastic welding machine, stationery, PVC folding box, PVC industrial belt, medical supplies, glasses box, tents, tools, electronics, electrical appliances, blister blister vacuum packing seal, etc.

Liaoning Unify High-Frequency Equipment Co., Ltd. is a renowned Chinese company specializing in R&D and manufacture of HF welding machine, rf welding supplies and automatic equipment. Please feel free to contact us if you have any further inquiry.

Structure And Working Principle Of High Frequency Welding Machine

Membrane welding machine is the electromechanical system used to realize high frequency welding. The membrane welding machine is composed of high frequency welding machine and tube welding machine. Membrane welding machine is generally composed of two parts: high frequency generator and feeding device. Its role is to generate high frequency current and control it; the forming machine consists of an extruding roller stand. Its function is to squeeze the part that is melted by the high-frequency current.

1. High-frequency generator: in the past, the high frequency generator used on the welded pipe unit was three-loop and it's basically been improved to a single loop later. There are many methods to adjust the output power of high frequency oscillator, such as autotransformer, reactance method, thyristor method and so on.

2. Feeding device: it is used to transmit high frequency current to the tube, including electrode contacts, induction coil and impedance. In general, in the contact welding, the electrode contact of wear-resisting copper-tungsten alloy is adopted, and the induction welding adopts the induction ring made of red copper. The main component of the impedance is the magnetic core, which is used to increase the inductive reactance on the surface of the pipe to reduce the invalid current and improve the welding speed. Impedance device adopts ferrite core, and it requests the Curie point temperature should be not lower than 310 ℃. Curie point temperature is an important indicator of the magnetic core. The higher the Curie point temperature is, the closer it will be to the weld, and the closer it is, the higher the welding efficiency will be.

3. The frequency control system is designed to make the triode always work at the resonance frequency of the system. The resonant frequency is determined by measuring the frequency of the output current. This frequency is then used as the time base signal to activate the transistor. The transistor driver card sends a signal to each transistor on each inverter module to control when the transistor is turned on and off.

4. The output power control of the induction heating system is controlled by the output current of the inverter. The above control is accomplished by a power control card used to control the triode driver.

5. The reference value of output power is given by the power reference potentiometer on the IMC control panel or it is output from the external control panel to the control system. After this value is transmitted to the system controller, it will be compared with the DC power value measured by the rectifier unit measurement system. The controller includes a qualification function that calculates a new output current setting based on the comparison of the reference power value with the DC power measurement value. The output power set value calculated by the controller is sent to the power control card, which will define the output current according to the new set value.

Liaoning Unify High-Frequency Equipment Co., Ltd. is a renowned Chinese company specializing in R&D and manufacture of HF welding machine, hf welding pvc and automatic equipment. Please feel free to contact us if you have any further inquiry.

How To Solve The Welding Problems Of PVC Membrane Welding Machine

At present, pvc membrane welding machine has been widely promoted in a number of plastic welding industry. Various welding defects are inevitable in the process of use. In this article, it mainly analyzes how to solve the problems in debugging or welding.

1. Crush and bruise

Pressing injury and abrasion are common problems in the process of pvc membrane welding machine. Sometimes it's not so serious, and it just gets white or marks. When you encounter such problems, the first thing to do is to ensure that the location of the tooling is not out of alignment. First let off the air of the cylinder, press down the welding head, and carefully observe whether the welding head position of the scratch is correct. If the welding head is in the correct position, or if the abrasion or compression occurs on the support (or lower cover), then it is necessary to observe whether there is any interference between the tooling and the product. If it is old tooling, it is suggested to clean the tooling with alcohol at this time. If it is a new fixture, lightly rub the scratch (especially at the bottom of the step) with sandpaper to prevent burrs. In addition, observe whether the air pressure of the cylinder is too large during welding, whether the film of the pad has not been changed for a long time during welding, or whether there are foreign bodies stuck on the film.

If the above work is done, the pressing injury still exists, it can be basically judged as the interference of tooling. At this time, the mold shall be modified according to the size and location of the pressing injury:

(1)slight pressing injury. File the sharp Angle of the tool at the corresponding place of the tool, blunt the sharp Angle of the tool, and then use sandpaper polishing;

(2)the pressing injury is serious, but there is no welding rib at the corresponding place. Rub off the interference part of the fixture with an air abrasive rod (be careful not to touch other parts, especially the root part of the air abrasive rod, which may be rubbed off other places without being noticed). After grinding, make it smooth with whetstone and buff with sandpaper;

(3)severe crush injury. If there is welding rib in the corresponding place, or if there is serious pressing injury and the interference part is very large, please consult with the designer. Have the processing center dealing with the modified drawing and contact the relevant personnel to confirm whether there is a problem with the injection molding, or whether to improve the product structure.

2. Material overflow

If there is any overflow in the welding process of pvc membrane welding machine, do not debug or modify the welding parameters right away. First measure the size after welding, and compare it with the normal value. Adjust according to the difference.

3. Insufficient welding strength

If it is old tooling, first stick the product on the welding head, observe whether the gap between the product and the welding head is too large in the weak welding place, to determine whether the welding head is worn; if it is a new tool, please scan it with the welding head, observe its frequency, power and curve, and make sure there is no problem with the welding head.

Liaoning Unify High-Frequency Equipment Co., Ltd. is a renowned Chinese company specializing in R&D and manufacture of HF welding machine, frequency welding machine and automatic equipment. Please feel free to contact us if you have any further inquiry.

Structural Features And Application Range Of PVC Door Welding Machine

1.The basic principle of pvc door welding machine:

This machine mainly adopts operating principle of high-frequency machine and radiofrequency. It makes use of the high - voltage transformer rectifier self - excitation high frequency tube oscillation moment to produce the high frequency electromagnetic wave current electric field. It makes use of processed materials PVC, TPU, EVA, PET in the field of high frequency electromagnetic wave, the internal molecules of plastic and plastic materials to produce polar heat conduction. Achieve welding sealing role of the plastics and plastic products needed for thermal welding by increasing some pressure.

2. Basic structure of pvc door welding machine:

1) the machine is mainly operated by double-head pedal pneumatic operation. The operation position is divided into the left and right sides of the handpiece. The operation table is designed with aluminum material, so that the electrical conductivity is more stable. The method of operation: Operator presses positioning die by right foot, presses high frequency switch by left foot. The cylinder drops automatically. Put pressure on products of thermal welding. High frequency current welding process is controlled by time, and the machine is used alternately on both sides.

2) the machine mainly adopts the operating principle of stem. The pressure of the powerful head can be adjusted at will. Adjust the corresponding pressure according to the actual requirement of different welding products. The machine head is designed with four ball bearings for positioning and sliding. They do not swing when operating up or down.

3. Features of pvc door welding machine:

1)  the frequency of the machine mainly adopts the international industrial band of 27.12MHz, which conforms to the international standard.

2) the machine can be equipped with stepless heating device system according to the properties of plastics and plastic materials, mainly for the heating outside the mold. The temperature can be adjusted according to the needs of the product.

4. Main scope of application of pvc door welding machine:

It is mainly used in the medical supplies industry; Plastic, plastic packaging industry, clothing embossing processing industry; Automobile interior decoration industry; Inflatable toy industry; Household products industry, and processing heat sealing welding of various plastic products such as leather, artificial leather, leather embossed indentation, etc, Heat seal welding of hot water bottle, warm handbag, blister shell, PVC blister shell, three-dimensional packaging bag, PVC ice bag, granule embossing, PVC packaging bag, glasses box, shoe upper embossing, identification belt, PVC calendering film, and blowing toy.

Liaoning Unify High-Frequency Equipment Co., Ltd. is a renowned Chinese company specializing in R&D and manufacture of HF welding machine, rf welding equipment and automatic equipment. Please feel free to contact us if you have any further inquiry.

Common Maintenance Problems Of RF Welder

After RF welder for sale by enterprises, there may be some breakdowns. Therefore, after RF welder for sale, enterprises need to provide after-sales service, including finding out the cause of failure, treatment, maintenance and so on. Liaoning Yufei High-Frequency Equipment Co., Ltd. is a professional RF welder manufacturing enterprise, devoted to the design, production, rf welder for sale and it provides thoughtful after-sales maintenance services?

Common failures of welder mainly include the following aspects:

1. The welder has no welding current output

The cause of the problem: no voltage input at the welding machine input end; The internal wiring is off or broken; The inner coil is burnt out.

Treatment: check whether the switch, wire, fuse wire and connection parts from the distribution box to the input end of the welding machine are intact. Check whether the wiring of switches and coils in the welder is intact. Check whether the primary windings and secondary windings of the welding machine are burnt (generally, the burn marks can be seen, and special smells will be smelled when burned). If the windings are burnt out, they should be replaced.

2. Small welding current or difficult arc ignition

The cause of the problem: Grid voltage is too low; the cross-sectional area of the power supply input line is too small (high resistance, high voltage loss); the welding cable is too long or the sectional area is too small; there are contaminants such as paint on the workpiece; bad contact between output cable and workpiece, loose current regulator.

Treatment: use it only after the grid voltage is restored to the rated value. According to the rated input current of the welding machine, equip it with enough cross-sectional area of the power cord. Increase the sectional area of welding cable or reduce the length of welding cable, generally not more than 15m. Remove dirt at the welding seam. Make the output cable in good contact with the workpiece and fix the loose part of the current regulator.

3. The welding machine is overheating, smoking or has burnt taste

The cause of the problem: the welding machine is overload; the grid voltage is too high; Wrong wiring. The common reason is that for welding machines with 220V and 380V voltage, 380V voltage is connected to the 220V input terminal by mistake. There is a short circuit in the coil.

Treatment: avoid overload, and reduce welding current. When you use a 220V single-phase power supply, it must be connected to the 220V input terminal of the welding machine. When you use the 380V two-phase power supply, it must be connected to the 380V input terminal of the welding machine. Check the coil to eliminate short circuit fault.

4. The welding machine is too noisy

The cause of the problem: coil short circuit; loose coil; moving core vibration; the fastening screw of the shell or chassis becomes loose.

Treatment: eliminate the problem coil short circuit; tighten the loose part of the coil; adjust the moving iron core and set the screws; check the fastening screws to eliminate looseness.

Liaoning Unify High-Frequency Equipment Co., Ltd. is a renowned Chinese company specializing in R&D and manufacture of HF welding machine, high frequency plastic welding machine and automatic equipment. Please feel free to contact us if you have any further inquiry.