Product Description

Briefing
Quangang Machinery has jointly developed with several relevant universities and institutes the internationally most advanced grating equipment of medium frequency welding machine,filled in the gaps in this field in China.
QGZP*****2A Steel Grating Machine applies various advanced technologies such as medium frequency, three-phase & four-line and therefore enjoys efficiency, power save ****0 percent, and many other advantages.
Parameters
Type: QGZP*****2A
Voltage Input: There Phase **0V+*0% *0HZ
Rated Capacity Input: **0 KVA
Rated Current Input: **0A****0A
Rated Air Pressure: 0.8Mpa
Cooling Water Flow: ＞**0L/min
Cooling Water Input Temperature:≤*0℃
Grating Sizes (mm) :
Width×Length  ***0×****0
Flat Steel ****5 wide, **6 thick, ≤***0 length, *0/*0 space
Cross (Rolled) Bars: ***0×5×5~***0×6×6
Cross Bar Space: *0/**0
Working Meter:≤9 seconds (welding time excluded)
Functions:
Cross bars put in order manually, send forward automatically;
Flat steels put in order manuallly, send forward automatically;
Gratings convey automatically;
Single Bars welding automatically every time, space auto-control;
Auto/Manual Operation Desk;
Current/Voltage Display;
Welding Paramenters can be set and reserved;
Each paramenter can be set and displayed intellectually.
Components/Features/Uses:
Flat Steel Feeding Unit:
To stock, arrange, guide and convey flat steels.
Cross Bars Feeding Units:
To arrange and transport cross bars. Firstly, choose and pick out crooked rolled bars. Secondly, push into guide-trench which can be adjusted according the size of bars. After fell into feeding part which is also adjustable in accordance with bar size, every time following a bar welded, the next bar is positioning-slot of the feeding hook. By the pneumatic and electrical control, the bar is got off the hook and sent to the welding.
Main Welding Engine:
This is the heart of whole assembly line and composed of Top Cover, Bottom Cover, Upright Shaft, Slide, Hydraulic Pump, Welding Power, Electric Conduction, Electrode Socket, and Electrode, Comb-like Clamping Apparatus, and Cooling Pipe.
Flat bars from the feeding unit get in order and positioned through comb-like apparatus. Cross bars from the feeding unit get positioned by the magnet overhead and welded tightly with flat bars. Repeat this welding process, needed steel gratings have been produced.
Steek Gratings Tow Unit:
To draw the welded gratings and transport gratings. Each time when a cross bar get welded, the unit tow it vertically away to a certain distance until whole welding completed, This unit is composed of jig, oil vat, electrical machine, ball screw, etc.
Electric System:
Mainly aimed to control every part of the whole welding machine and set every welding apparatus. Composed of programming control circuit, power control circuit and graph operation terminal (touch-screen).
Programming control circuit:
PLC central control,manually and automatically. When operated manually, you can start each unit in proper order and also can start any one unit very briefly for a test. Every unit working situation and alarming function are included in this circuit.
Components of Control Unit:
The control unit is composed of control, transformer and other components. Among them, the control comprises power drive, rectifier, capacitor, TGBT, centrol, etc.
Main Features of Control Circuit:
Output: 1KHZ, time precision: ms;
*4 different welding programs;
3 heating steps: preheat, welding, tempering;
*0 pressure programming;
Graph Operation Terminal:
All welding procedures and grating parameters can be set, altered, monitored by the Graph Operation Terminal.
Operation Desk
Power:
Power sign, s of General Power On/Off, Oil Pump Start/Stop.
Extreme Attention: General Power On/Off only controls the power of welding machine, Not the welding machine main circuit. Whenever maintain or repair the welding machine, you MUST switch off the main circuit of the welding machine.
Tow Unit:
Tow Tighten, Grating Down/Up/Back/Loosen s only can be used during manual welding.
Feeding Material:
Feeding, Bars Backward/Forward, Feeding Forward/Backward s only can be used during manual welding.
Signs & Alarm:
The signs of Power, Oil Pressure, Alarm, Auto/Manual, Power On display the working situation of every part of the welding machine.
Parameters Set:
Either by the Figure Operation Terminal or the welding cabinet.
Positionings:
Flat Tighten/Loosen, Up/Down s control the comb-jig and the end positioning.
Press:
Press Up/Down, Oil Pressure High/Low s control the press up/down and can be used only for manual welding.
Welding:
Buttons of Auto/Manual, Auto Start/Continue, Suspend.
Emergency:
When accident or other unexpected occurred, press this , the power for the welding machine can be cut off immediately.
Special Attention:
When the power for welding machine is switched on, no body can be allowed to stay in the space between welding machine and tow unit.
No body can be allowed to stay under the slide board of the welding machine.
The slide board of the welding machine must be sustained safely when conduct either repair or maintenance.
Operation Rules
Install the welding machine; Check the power , check up the insulating and ground resistance;
Connect the power, press the air, and cool the water;
Inspect the three-phase power, air pressure, flow and temperature of cooling water;
Push the of Power sign gets displayed then;
Push the of Oil Pump Start;
Check the Signs & Alarm mark sure the Hydraulic Press, Oil Pump signs are displayed;
Get the flats and arrangd them well by the comb-jig;
Adjust bars feeding unit to meet your requests;
Change and adjust the jigs;
Set the slide board moving distance according to needed height of the flat steel;
Up the end positioning and send the flat steel to the welding machine, make sure all are in good position;
Set paramenters on the Operation Desk to meet different grating needs;
Switch the Auto/ Manual to Auto, push Welding Start.
Solving Problems
If the welding machine does not work when on Auto situation
Check and start hydraulic pressure, make sure the sign of Hydraulic Pressure lights.
Check and connect pressed air source, make sure air pressure ＞0.8Mpa and the sign of Pneumatic System lights.
Check and connect cycle cooling water and make sure the water cycle and temperature normal.
Check and make sure the tow unit is in original position and the sign of Original Position lights.
Check and make sure the press is in original up position and the is connecting normal.
Check and make sure feeding cylinders including values and pipeline of feeding unit are normal.
Check and make sure the reduction of feeding bearings and axial are connecting normal.
If it is stopped after one roll steel fed down and the bearings and axial are not reductive
Check and make sure roll steel feeding approach is connecting normal.
Check and adjust the space of roll steeel feeding slot, get it fit the diameter of roll steel.
If the hook stops feeding at the next feeding position after one roll steel fed
Check and make sure feeding cylinders including valves and pipeline of feeding unit are normal.
Check and make sure the press is in up position
Check and make sure the roll steel hold is in down position.
If the up end of feeding hook does not move down and stop after get the roll steel arrived
Check and make sure if the roll steel are attracted in the both ends of the magnet.
Check and make sure the ends of the magnet get connected.
If the electrode of the press stops working after moved down.
Check and make sure if the electrode approaching gets loose.
Check and make sure if the electrical machine has move down to the position.
If there is no welding electric current or the current is abnormal
Check and make sure if the welding parameters have been set normal.
Check the water temperature.
Check the welding control circuit.
Check and make sure if the silicon of the welding transformer works normal.
Check the rectifier of the transformer.
Check and make sure the connect of welding electrode with its set and with the bolt.
If the tow unit stops working after welding finished
Check and make sure the tow unit drive works normal.
Check and make sure the inductive of comb-jig is normal.
Check and make sure if the comb-jig get loose.
Check and make sure if the grating up cylinder works normal.
Check the air pressure.
If the tow unit stops moving back
Check and make sure if the distance inductive of tow unit is in proper position.
Check and make sure if the holding boards of tow unit are loose and the inductive lights.
If the tolerance of the tow unit is big.
Check and make sure the size are set normal.
Check and make sure if the holding unit is pressed tight.
Maintenance
Per Shift:
Clean the electrode surface
Check up the cooling pipeline make sure it is unblocked
Clean the welding desk surface
Put lubrication oil twice on the welding machine slideway
Put lubrication oil once on the guide of the bars feeding uint
Put lubrication oil twice on the ball leading screw of electric.
Per week:
Clean every components surface
Correct the electrode
Per Month:
Check up the hydraulic liquid level
Change cooling water,in cold region frostbite oil needed
Put lubrication oil on the slide parts.
Per season:
Check and make sure if every water pipe get leaked and changd it if need;
Clean filter of the hydraulic station;
Per Year:
Change hydraulic oil;
Change those often used position boards of flat steel;
Change those often used flat steel guide;
Change those often used flat steel discharge part;
Change the terminal plastic cooling pipe.
Caution:
This equipment must meet these neccesary conditions:
Maximun Temperature:*0℃
Minimum Temperature:0℃
Humidity:≤*9%
Running Hours:＞*0 hours daily;＞6.**0 hours annually
Power Supply: **0KVA,**0V±*0%/*0HZ
Air Supply: Air pressure 0.6 Mpa; Working pressure 0.*5 Mpa; Flow≥0.6 cubic meter/minute.
Water Supply: Cooling water temperature below *0℃, flow rate＞**0L/min, pressure≥0.*5Mpa, pipe diameter ≥3 inches, output pipe diameter ≥6 inches.
Softened water must be used.
Water supply/discharge can be in cycle. 
Welding Machine Parameters:
Type: QGZP*****2A.
Welding Frequency: ***0HZ.
Voltage Input:  Three Phase **0V±*0%,*0HZ.
Rated Capacity Input:  **0 KVA.
Rated Current Input:  **0A****0A.
Rated Air Pressure:  0.8Mpa.
Cooling Water Flow: ≧**0L/min.
Cooling Water Input Temperature: ≦*0℃.
Dimensions:*4(m) ×4(m) ×4（m）.
Welding Capacity:**0㎡/8 hours.
Grating Sizes (mm):
Width ×Length:***0×****0.
Flat Steel ****5wide, **6thick, *0/*0space.
Cross(Rolled)Bars:***0×5×*****0×8×8.
Cross Bar Space: ≧*0.
Working Rhythm: ≦9seconds(excluded welding time).