What is the quality of Chennan welding machine

Chennan welding machine is not bad, it is an old brand. Now you are using the Chennan welding machine.

I haven't heard of it, the times, Kailda is okay.

Haven't heard of this brand.

Even a manufacturer** is an empty number, and it is a woolen yarn.

1. When purchasing welding machine products, it is necessary to go to regular production enterprises or large shopping malls to buy, and to buy brand famous products with high market share.

2. When purchasing, check whether the nameplate on the product has the name of the manufacturer, production address, specification and model, welding current adjustment range, load duration rate and input voltage and current, etc., and then determine the welding machine you want to buy according to the needs of the work.

3. When purchasing, you can ask the dealer to provide a product quality inspection report or certificate.

4. When purchasing, be sure to check whether the product has grounding screws, and the grounding screw connection should be paintless and well grounded.

5. Before purchasing, you can power on to check the operation, conversion and installation of the switch on the panel.

6. If you want to buy a gas shielded welding machine, you should also check whether the accessories are complete before purchasing.

How it works. The main component of the welding machine is a step-down transformer, and the two ends of the secondary coil are the welded workpiece and the welding rod, which ignites the arc during work, and welds the welding rod into the gap of the workpiece in the high temperature of the arc. Because the core of the electric welding transformer has its own characteristics, it has the characteristic of a sharp drop in voltage, that is, the voltage drops after the electrode is ignited; When the electrode is short-circuited by adhesives, the voltage drops dramatically.

In the welding operation, although the current in the circuit is equal everywhere, but because the resistance is not the same everywhere, the resistance at the unfixed contact is the largest (this resistance is called contact resistance), according to the law of thermal effect of the current (also called Joul's law), that is, Q = IRT can be known: when the current is equal, the greater the resistance, the higher the heat.

Therefore, when welding, the contact resistance of the contact of the welding rod, that is, the contact point of the metal body to be connected, is the largest, and the electric heat generated in this part is naturally the most, and the welding rod is an alloy with a low melting point, which is naturally easy to melt. The molten alloy electrode core is bonded to the welded object, and after cooling, the welded object is glued together.

The panel of the DC inverter welding machine is equipped with an output DC current adjustment knob. The inverter DC welding machine first carries out bridge rectification and filtering of single-phase AC 220V voltage or three-phase AC 380V voltage, and then supplies power switching devices for inverter processing.

A small number of inverter welding machines first use 555 time-based circuits and other pulse generation circuits to generate rectangular pulse waves, then use triodes for current amplification, and then use a pair of complementary MOSFETs for voltage amplification, so as to generate high-frequency signals, and finally use step-up transformers to boost voltage, and get inductive alternating current on the secondary winding. The magnitude of its power depends on the amplification capacity of the amplifier circuit.

The inverter welding machine mostly adopts a single-end forward inverter circuit composed of IGBT tubes, and its control system mostly uses the pulse width modulation chip SG3525, whose inverter frequency is 20kHz, and can be controlled by constant current external characteristics.

When the system is at no load, due to the use of voltage feedback control, the PWM modulator outputs pulses intermittently, because the frequency of intermittent oscillation is low and the pulse width is narrow, so that not only the no-load loss is small, but also the transformer is not easy to saturate. Because this type of welding machine adopts the control technology with pulse width modulation PWM as the core, it can obtain better constant current characteristics and excellent welding process effect.

Quality judgment standard of electric welding machine (purchase basis):

1. Whether the welding machine has national mandatory 3C certification products.

2. Select the practicability of the product suitable for welding (according to the long-term engineering nature of the required welding machine performance requirements).

3. Whether the technical parameters of the main product on the appearance, paint and panel of the whole machine are consistent with the actual product.

4. The duty cycle of the welding machine is the most critical, and it represents the quality of the welding machine when it is loaded.

5. In the welding process, the arc is stable, the size of the current adjustment range, and the forming after welding is qualified, and it is best to use the various processes mastered.

1. From the point of view of the length of the motor core: the stator of the motor is die-cast silicon steel plate, and the die-casting length and die-casting density have a great impact on the performance of the motor. Some companies reduce costs by shortening the length of the iron core and reducing the brand of silicon steel plate, and the ** of the motor is very low.

2. From the point of view of the full rate of the copper wire duct of the motor: the full rate of the copper wire duct is the amount of copper wire used, the longer the core, the more copper wire is used, the higher the slot full rate, the more copper wire is used, the copper wire is sufficient, the motor performance becomes better, and some production enterprises reduce the stator groove without changing the core length, reduce the amount of copper wire used, and reduce costs.

3. From the perspective of motor bearing: the bearing is the carrier that bears the high-speed operation of the motor rotor, and the most prone to failure of the motor is the component that affects the quality of the bearing, the operation noise and heat of the motor. Kelaiwei's bearings are purchased from well-known bearing manufacturers in China.

The reliability of the bearing is guaranteed. Improved product quality and reduced motor failures.

Precautions for the use of electric welding machines.

1. The working site of the welding machine should be kept dry and well ventilated.

2. According to the technical conditions of the workpiece, a reasonable welding process (welding rod, welding current and duty cycle) should be selected, overload use is not allowed, and no load power failure device should be used as much as possible.

3. In load welding, the temperature rise of the welding machine should not exceed 601 zhang for grade A and 80 zhang for grade B, otherwise it should be stopped and cooled down before welding.

4. In welding, it is not allowed to adjust the current, and the current of the welding machine must be adjusted by using the handle when the welding is stopped, and it must not be too fast and too violent, so as not to damage the regulator.

The high price is better than the low price, hehe.

It is still good for foreign brands, such as Lincoln and Panasonic. Generally, you can buy Tangshan Panasonic.

To put it simply, the heavier the better.

I think the quality of the Keyue welding machine is not good, I bought three all Keyue welding machines, a ZX7 200 manual welding machine is less than a year and does not use much to have the problem of not boiling, one of the two argon arc welding machines broke twice a year or so, and one of the three Keyue welding machines was not broken, and I did not praise the Keyue welding machine.

Keyue welding machine! Made in Zhuzhou! Good value for money!

It doesn't focus on brand benefits, it's mainly about repeat customers! The machine is very good and not famous! A long history!

It's all imported components! There is no manufacturer that can say that the absolute 100% pass rate! Keyue welding machine is the most complete after-sales factory of welding machine!

I have bought an imitation Panasonic two welding NB-350A, the maximum current of the welding wire used to reach 270A, a penny, ** cheaper than Panasonic nearly half, at home engaged in electrical welding processing bought for three years has not had any problems.

I bought a plasma, no, the motherboard broke once, and then it became a cut that didn't move, the quality was poor, and it is still sitting aside to eat dust.

The quality is so poor! I used it for ten months, three times to reverse the factory, and every time the factory would come to connect the power supply, it would break! I don't want to change the machine yet!!

Keyue welding machine may not be very famous, but it is the best and most complete brand of after-sales service in the welding machine industry!

I have bought Keyue's welding, and it seems that I have been using it in the factory for two or three years, and I feel good.

Are you the manufacturer asking yourself questions? What kind of garbage Keyue, I have 10 welders Only this Keyue sleeps a lot for many years!

The quality of Keyue welding machine is very stable, and you can buy it with confidence.

I've been repairing for many years, and I haven't heard of any Keyue, so I don't seem to be well-known. It is recommended that you buy welding machines such as Aotai and Yunike, hehe!

I think this quality is still good, yes**.

It doesn't look like it, there is a wide can buy a high imitation drop.

First of all, you see if it is a three-no product, so that you can confirm whether it is **.

You will know if you connect the electrode for a long time.

The machine is very not wrong, their warranty is also very good, within one year zhi has quality problems free replacement machine two years warranty, dao I choose when they support this after-sales service. Absolutely large manufacturers have the bearing. I bought it half a year ago, and the firepower is still very strong. Welding the electrode for one day is no problem, and it is even better than the Ruiling purchased before.

Working principle of electric welding machine:

The electrode and the weldment are connected to the two outputs of the power supply. When you start welding, let the electrode and the weldment come into contact. At this time, the power supply is short-circuited, and the current flowing through the contact is very large, coupled with the rough contact surface of the electrode and the weldment, in fact, there are only a few points in contact, and the contact resistance is large, so the contact generates a lot of heat.

Lift the electrode later, so that there is a certain gap between the electrode and the weldment.

The big welding machine I bought online broke down after nine months, and it was shut down several times.

The machine is very copying.

Okay, I bought their baizx7-200 upgrade half a year ago, and the firepower is still very fierce until now, and the welding rod is no problem for a day, which is better than the Ruiling I bought before the dao. And their warranty is also very good, within one year there are quality problems free replacement machine for two years warranty, when I choose they support this after-sales service. Absolutely large manufacturers have the bearing.

Now the welding machine brand is too miscellaneous ** competition is fierce, the quality decline is serious after the manufacturing cost is reduced, and it is better to buy a welding machine or a brand. Buy a good one for a long time, buy a bad one to the nearest hardware city to buy, easy to maintain. If there is a problem with buying online, the delivery is the most troublesome, the machine is heavy, the logistics are expensive, and you have to wait for a few days, and the cheap money is wasted on the road.

I bought a big welding machine in **, and it broke after using it a few times.

The electrolytic capacitor is seriously fraudulent, and the flagship version is said to use 6 820uf, but it is actually 6 470uf!

It's not good, it's broken a few times, the warranty requires you to mail it to Guangdong, and you pay the round-trip freight.

Cutting corners, it's not good to start the arc.

I send courier 5 2. I choose a mini welder.

Small brands, small manufacturers of welding machines are not recommended to buy, if you want to buy, buy a first-line brand of welding machines, durable, stable performance,

Look at the pinyin abbreviation and pattern should be "Tai Chi".

As for the quality, it's not easy to say, some small brands will also have better quality things!

This kind of welding machine should be a high-power electric welding machine, and it is absolutely OK for ordinary use, so feel free to use it.

I haven't heard of this brand, but it is sold on the Internet, the good ones can choose Ruiling and Jasic, and the cost-effective ones can choose Andriy and Lelison, these brands are good.

The new energy welding machine is three no, OEM, not certified by 3C, after receiving it was dismantled and found that the profiteers hung sheep's heads to sell dog meat, profiteers, everyone keep their eyes open, must disassemble the machine for inspection, disassemble to see the capacitors, other capacitors are empty shells, empty capacitors glued with glue, or continue to deceive customers on Tmall, Tmall will always allow this kind of profiteers to cheat, continue to sell.

I haven't heard of this brand, the welding machine is divided into industrial models and civilian models, I don't know if you are used in **, there is money to buy Oudixi and Panasonic, Qian Shaochuan welding, Jasic. I don't know what welding machine you want to buy, gas shielded welding, manual welding, argon arc welding. Submerged arc welding ???