Middle Frequency Inverter DC Welding Machine

• Control: Semi-Automatic
• Cooling Way: Water Cooling
• Style: Fixed
• Electrode Stroke: Vertical
• Electric Current: DC Shock Wave
• Transmission: Pneumatic
• Model NO.: MF Series
• Conductive Way: Both-Sided
• Welding Spot Number: Single
• Type: Universal
• Rated Voltage: 380V/415V/480V
• Warranty: One Year
• Transport Package: Wooden Box
• Specification: different model with different size
• Trademark: DuroWelder
• Origin: China

Product Description

Main Features and Applications

1.Resistance Welding is one kind of welding technology which melt the metal material by the resistance heating energy which is generated by the welding current passing the workpiece itself.Therefore by increase or adjusting the welding current frequency,it can change and improve the weling quality. Just basing on this theroy,we develop the Middle Frequency Inverter DC Welding Machine,its welding current frequency increase to 1000HZ from  common 50HZ or 60HZ. The controlling time precision is much higher,the power factor is more than 98%,without eddy current electromagnetic induction interference,the welding quality is also improved a lot.

2.While not for all the workpiece, the current optimum value is all same as 1000HZ,some need bigger welding frequency,others need less,just because this reason,basing on the Middle Frequency Welding Technology,we also develop VF Series Variable Frequency Welding Machine which welding frequency is adjustable.The principle is that by the added a IGBT pulse width adjustable "Welding Controller" and the output voltage of V and transformer turns N and all adjustable "Welding Transformer" to fulfill the function of adjustable frequency.

3.However,these two kinds of welding methods both can not adjust welding current value of each welding automatically according to the subtle changes of workpiece.In order to meet much higher request to welding quality,such as for the automotive,aircraft and other high-end products,we develop one kind of "Dynamic Resistance Principle Auto Self Adaptive Control System".It can install to both MF and VF Welder,by this way they can adjust the welding current automatically basing different product.This system is based on the constant current mode control technique,according to the workpiece thickness,different dirt surface of workpiece and the corrosion degree,current shunt,the operator's individual difference factors,such as the subtle changes and solder joints,it can automatically adjust welding current during the welding process of each welding spot,ensure the consistency of the welding quality and effect.

4.Middle Frequence and Variable Frequency Welder are both powered by three-phase power,compared to the traditional AC welder two-phase power supply,will not cause the fluctuation of power supply,also can adapt suddenly lifting voltage strongly.Current output is also more accurate,more stable,more energy saving and more efficient.

5.These kinds of higher technology is specially suitable for welding higher conductive rate of material,such as aluminum,copper,silver,and so on.Also good at welding much more thicker workpiece,automobile,aerospace,and other high request products and industry. 

Main Technical Parameter

Parameter/Model	MF-50KVA	MF-90KVA	MF-150KVA	MF-170KVA	MF-250KVA	MF-300KVA	MF-450KVA
Rated Voltage	3(3-Phase),(AC), 380-----415----480V,50/60HZ.
Rated Capacity	50KVA	90KVA	150KVA	170KVA	250KVA	300KVA
Rated Duty Cycle	50%	50%	50%	50%	50%	50%
Max Welding Current	18500A	23500A	32000A	40500A	60500A	80000A	120000A
Electrode Stroke	75MM		100MM
Welding Arm Spacing	260MM		320MM
Air Source Pressure	0.6MPa
Cooling Water Flow	16L/Minute	25L/Minute	35 L/Minute	45L/Minute

Our Machine











Our Factory

Why choose Durowelder products?

1. About product purpose.

1. The pursit of quality, advocating the best services.
2. For customers to reduce costs and improve efficiency.

1. About Factory.

1. Founded by WELDING TECHNOLOGIES, USA and serves as its Manufacturing Plant in order to bring latest achievements in welding science and technology to the biggest market of welding equipment in the world China with a goal to support a demand for high quality equipment in the region and beyond. Excellent service on before sale, on sale and after sale.
2. Quick response, all your question will be answered within 48 hours. Our motto is "Quality" first, customer utmost". We have professional sales team, who is not only a repair but also a problem solver, we always give customers the most feasible marketing suggestions according to their own market mode.

1. About Market.

     Our products are widely accepted all over the world, such as USA, Mexico, Southeast Asia, India etc.

1. Why choose DuroWelder?

1. Welcome to visit our factory before your place an order.
2. High quality control.
3. Over 10 years mechanical manufacturer.
4. Cooperate with many foreign customers.
5. Committed to the standardization of machinery market. We make great efforts to the production of high quality and durable machine with the technological innovation.
6. Our products with best price and quality.
7. Our mission is to help our customers reduce cost and improve efficiency.

1. Shipping

1. Sea transportation, land transportation, air transportation, the express transport and so on.
2. Please choose your convenient shipping method according your details requirement.
3. The shipping discount is different in different season and depend different weight, we will choose the cheapest and safest way according your details quantities.

1. Delivery

1. Delivery time is 5-15 working days.
2. Depends on order quantity.
3. Special product to discuss.

1. Warranty

    One year warranty and technical support.