Cabin Doors Portable Clamp or Press Type Spot Welding Machine

MD Series Middle Frequency DC Inverter Spot & Projection Welding Machine

MD Series Middle Frequency DC Inverter Spot & Projection Welding Machine is an advanced welding equipment..welding transformer small size and large energy output,it is widely used.it is specially used in transformer welding clamp style of car industry.and its superior performance is because of their  welding transformer frequency from the city electricity 50/60 HZ upgrade to 1000 HZ, greatly reducing the weight of the core material, moreover,the  rectifier diodes in the  sub-circuits of the transformer make the energy into DC power supply  for the use of welding supply. This will greatly improve the value of induction of sub-circuits ,which will minimize the cost of production.
In the big open area of the secondary circuit can reduce interference: welding current to direct current, when the secondary winding in the induction / a magnetic material, will not affect the welding.
So that the load-balancing power supply equipment MF invert spot and projection welding machine used three-phase power and energy can be stored
Fluctuations in the power grid and the pressure adaptability should be more: part of the energy storage inverter to supply load, replacing the way of power grid directly from the power supply to the load.
More accurate and fast current control : compared with the frequency system can be more accurate analysis of parameters
Faster to set up current: MF in regulation  welding current can 20 times faster   than traditional technology. 
The process more reliable: Most of the metal used resistance welding would be better to use direct current welding.
Reduce operating costs, including energy savings every point of welding and shorten the cycle of welding.
Energy savings: Compared with the use of the frequency can reduce electricity consumption, adapted to welding the thick work-piece and high-conductive metal. Such as aluminum and galvanized steel sheet, and so on.

Main technical parameters

model	MF-20	MF-40	MF-80	MF-120
Input voltage	220V/380V +-15%	220V/380V +-15%	220V/380V +-15%	220V/380V +-15%
Input frequency	50HZ	50HZ	50HZ	50HZ
Transformer voltage	DC500V	DC500V	DC500V	DC500V
working frequency	1KHZ-8KHZ	1KHZ-4KHZ	1KHZ-2KHZ	1KHZ-2KHZ
Current form	MF/DC	MF/DC	MF/DC	MF/DC
Maximum output current 20%	400A	720A	1100A	1980A
Continuous output current 100%	120A	230A	400A	630A
Control mode	KSR/KUR/SKT	KSR/KUR/SKT	KSR/KUR/SKT	KSR/KUR/SKT
Current feedback mode	Primary/secondary	Primary/secondary	Primary/secondary	Primary/secondary
Operating display	PC	PC	PC	PC
Data specification (group)	7	256	64K	64K
Communication site number	1-7	1-255	1-255	1-255
Protocol	9600,7,E,1	9600,7,E,1	9600,7,E,1	9600,7,E,1
General format	RS485/RS232	RS485/RS232	RS485/RS232	RS485/RS232
Control progress	+ -1%	+ -1%	+ -1%	+ -1%

Our Factory

1: Are you trading company or manufacturer? 
A: We are factory and we can export machine.
2: What is your terms of payment?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance, balance before shippment.
3: Do you provide samples? is it free or extra?
A: Yes, we could offer the welding sample for free charge but do not pay the cost of freight. Except for special workpiece. 
4: Do your factory sale directly?
A: YES,  it is our factory sale directly, competitive price with high quality and excellent after-sale service.
Our quality products have been export to many countries, such as India, Russia, USA,  South Korea, Saudi Arabia, Brazil, Malaysia, Thailand, Taiwan and so on. 
5: Where are your factory?
A: Our factory located in Durowelder Industrial Zone,Boluo District,Huizhou City, China 
6: What does your factory produce?
A:  Induction heating machine, Resistance welding machine, Flash butt welding machine,  Rolling and straight seam welding machine, Medium Frequency inverter DC welding machine, Wire mesh welding machine, Automatic argon arc welding machines, plasma welding, Various types of customized automatic auxiliary machine.
7: What about your factory after-sales service and warranty?
A: In the guarantee time (1 year), we will send the spare parts to you for free. And provide the technical consultant for anytime.
 If needed, we can send our engineers to your factory to help installing, repair our welding machine or train the workers and so on.(Charge item)
We will provide same good after-sale service as the pre-sale service.