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TECNA, 6121 – 6128 MFDC Series Press / Projection Welder (90 kVA – 160 kVA)

Versatile TECNA 612X Series 90 – 160 kVA MFDC Press-Type Spot Welders designed as to perform both spot and projection welding. The mechanical frame of these machines has been designed so to minimize the flexions. This body, combined with the inverter technology, allows to obtain high quality welding. The six working modes provided by the TE700 control unit allow to choose the most suitable welding mode for the material to be welded. It is also possible to implement a proportional valve in the pneumatic circuit thus ensuring a high work pressure precision and constancy. The proportional valve is programmable directly from the control unit and allows to match to each program its relevant pressure value. The inverter technology, which these machines are provided with, allows a higher welding quality, an extreme precision in time and current and a reduction in costs, installation ones included. The welding time is adjusted in milliseconds thus allowing the best set-up. The welding current is supplied continuously and constantly and is not affected by the dimensions of the welding circuit.

  • Medium frequency welders, designed to obtain high quality welding.
  • Modular design of mechanical structure, arms, brackets, cylinders.
  • Cylinder with chrome plated stem for heavy duty works and long life; adjustable anti-rotation device.
  • Lubrication free pneumatic components to eliminate oil mist and to protect the environment.
  • Adjustable double-stroke cylinder with key control. Alternatively, it may be managed by a pneumatic pedal.
  • Electrodes descent without pressure for both maintenance and set-up.
  • Built-in compressed air filter unit and tank. Compressed air disconnection device.
  • Water-cooled transformer, plates, electrode-holders and electrodes; transformer with epoxy resin coated windings.
  • Two stage electric foot control for clamping and welding pieces only if correctly positioned.
  • Pre-setting for additional double stage electric foot switch connection for the direct recalling of a different welding program.
  • Arranged for all models: two-hand safety control with timer and removable key selector, assuring the best safety. The two-hand control device is standard on projection models only (it is available upon request on spot welder models).
  • Emergency push-button to stop the machine immediately.
  • Protection with automatic circuit breaker.
  • Flow-switch which stops the machine if the cooling water does not flow and valve for blocking the water-cooling flow when the machine is off.
  • (optional) USB port for data storage.
  • Pneumatic circuit equipped with low force squeeze (optional), particularly suitable when projection welding and when spot welding delicate parts.
  • Position sensor (optional) which allows to measure the initial thickness of the material to be welded and to verify the presence and the dimensional accuracy of the materials to be welded before welding. It also allows to measure the penetration of the electrodes at the end of the welding process. It is also possible to stop the current flow once the set penetration value has been achieved.


* Features and specifications may vary, and are subject to change without notice

SPECIFICATION UNITS 6121N 6122N 6124N
Spot Welder   Spot Spot Spot
Projection Welder   Projection Projection Projection
Standard Weld Control   TE700 TE700 TE700
Power @ 25% Duty Cycle kVA 142 142 316
Power @ 50% Duty Cycle kVA 90 90 200
Short Circuit Current A 32,000 32,000 64,000
Thermal Current @ 100% kA 6.1 6.1 13
Secondary Voltage V 9.9 9.9 10.4
Supply Voltage (@60Hz)* V 440 440 440
Primary Cables Ø (up to 30m) mm² 35 35 95
Delayed Fuses @ 440VAC A 100 100 175
Arm Spacing Range (Gap) in (mm) 6.9-18.7 (175-475) 6.9-18.7 (175-475) 6.9-18.7 (175-475)
Throat Depth – To Electrode Holders in (mm) 15.35 (390) 21.26 (540) 15.35 (390)
Throat Depth – To Tooling Platens in (mm) 10.32 (262) 16.22 (412) 10.32 (262)
# Slots & Spacing # / in (mm) 2 / 2.48 (63) 2 / 2.48 (63) 2 / 2.48 (63)
Max Electrode Force – Standard @ 87 psi (6 bar) lbs. (daN) 1619.2 (736) 1619.2 (736) 1619.2 (736)
Max Electrode Force – High-Force Option 8235 @ 87 psi (6 bar) lbs. (daN) 2732.4 (1242) 2732.4 (1242) 2732.4 (1242)
Working Stroke in (mm) 3.94 (100) 3.94 (100) 3.94 (100)
Adjustable Retraction Stroke (Standard) in (mm) 0.00-3.15 (0-80) 0.00-3.15 (0-80) 0.00-3.15 (0-80)
Compressed Air Supply psi (bar) 94.3 (6.5) 94.3 (6.5) 94.3 (6.5)
Air Consumption per 1000 Spots @ 94 psi (650kP / 6.5 bar)        
Standard Welder – 20mm Stroke SCF (N/m³) 162 (4.6) 162 (4.6) 162 (4.6)
Standard Welder – Max Stroke SCF (N/m³) 544 (15.4) 544 (15.4) 544 (15.4)
Option 6135 – 20mm Stroke SCF (N/m³) 332 (9.4) 332 (9.4) 332 (9.4)
Option 6135 – Max Stroke SCF (N/m³) 766 (21.7) 766 (21.7) 766 (21.7)
Air Hose Inside Ø in (mm) 0.63 (16) 0.63 (16) 0.63 (16)
Water Cooling @ 36 psi (250 kP / 2.5 bar) gpm (lpm) 2.64 (10) 2.64 (10) 3.17 (12)
Net Weight lbs (kg) 1078 (490) 1100 (500) 1188 (540)
Arm Diameter in (mm) 2.36 (60) 2.36 (60) 2.36 (60)
Electrode Holder Diameter in (mm) 1.26 (32) 1.26 (32) 1.26 (32)
Electrode Taper   2MT/5RW 2MT/5RW 2MT/5RW
Dimensions (LxWxH) in (mm) 48.9 x 17.3 x 76.3 (1243 x 440 x 1938) 52.9 x 17.3 x 76.3 (1343 x 440 x 1938) 48.9 x 17.3 x 76.3 (1243 x 440 x 1938)
         
Max Power kVA 230 295 460
Maximum Welding Current on Aluminum kA 36 40 49
Maximum Welding Current on Steel kA 32 35 43
Tooling Platen Dimensions in (mm) 4.72/5.51 (120/140) 4.72/5.51 (120/140) 4.72/5.51 (120/140)
Aerial Noise Produced dB(A) 71 73 77
Measured Conditions        
Working Stroke in (mm) 1.97 (50) 1.97 (50) 1.97 (50)
Welding Time Cycles 13 11 12
Welding Current kA 29 34 41
Working Rating (Welds per Minute) #/min 6 6 6
*May be supplied capable of operating on other voltages/frequencies. Please ask for details.    
SPECIFICATION UNITS 6125N 6127N 6128N
Spot Welder   Spot Spot Spot
Projection Welder   Projection Projection Projection
Standard Weld Control   TE700 TE700 TE700
Power @ 25% Duty Cycle kVA 316 253 253
Power @ 50% Duty Cycle kVA 200 160 160
Short Circuit Current A 64,000 42,000 42,000
Thermal Current @ 100% kA 13 8.8 8.8
Secondary Voltage V 10.4 12.3 12.3
Supply Voltage (@60Hz)* V 440 440 440
Primary Cables Ø (up to 30m) mm² 95 70 70
Delayed Fuses @ 440VAC A 175 150 150
Arm Spacing Range (Gap) in (mm) 6.9-18.7 (175-475) 6.9-18.7 (175-475) 6.9-18.7 (175-475)
Throat Depth – To Electrode Holders in (mm) 21.26 (540) 15.35 (390) 21.26 (540)
Throat Depth – To Tooling Platens in (mm) 16.22 (412) 10.32 (262) 16.22 (412)
# Slots & Spacing # / in (mm) 2 / 2.48 (63) 2 / 2.48 (63) 2 / 2.48 (63)
Max Electrode Force – Standard @ 87 psi (6 bar) lbs. (daN) 1619.2 (736) 1619.2 (736) 1619.2 (736)
Max Electrode Force – High-Force Option 8235 @ 87 psi (6 bar) lbs. (daN) 2732.4 (1242) 2732.4 (1242) 2732.4 (1242)
Working Stroke in (mm) 3.94 (100) 3.94 (100) 3.94 (100)
Adjustable Retraction Stroke (Standard) in (mm) 0.00-3.15 (0-80) 0.00-3.15 (0-80) 0.00-3.15 (0-80)
Compressed Air Supply psi (bar) 94.3 (6.5) 94.3 (6.5) 94.3 (6.5)
Air Consumption per 1000 Spots @ 94 psi (650kP / 6.5 bar)        
Standard Welder – 20mm Stroke SCF (N/m³) 162 (4.6) 162 (4.6) 162 (4.6)
Standard Welder – Max Stroke SCF (N/m³) 544 (15.4) 544 (15.4) 544 (15.4)
Option 6135 – 20mm Stroke SCF (N/m³) 332 (9.4) 332 (9.4) 332 (9.4)
Option 6135 – Max Stroke SCF (N/m³) 766 (21.7) 766 (21.7) 766 (21.7)
Air Hose Inside Ø in (mm) 0.63 (16) 0.63 (16) 0.63 (16)
Water Cooling @ 36 psi (250 kP / 2.5 bar) gpm (lpm) 3.17 (12) 3.17 (12) 3.17 (12)
Net Weight lbs (kg) 1210 (550) 1188 (540) 1210 (550)
Arm Diameter in (mm) 2.36 (60) 2.36 (60) 2.36 (60)
Electrode Holder Diameter in (mm) 1.26 (32) 1.26 (32) 1.26 (32)
Electrode Taper   2MT/5RW 2MT/5RW 2MT/5RW
Dimensions (LxWxH) in (mm) 52.9 x 17.3 x 76.3 (1343 x 440 x 1938) 48.9 x 17.3 x 76.3 (1243 x 440 x 1938) 52.9 x 17.3 x 76.3 (1343 x 440 x 1938)
         
Max Power kVA 170 315 350
Maximum Welding Current on Aluminum kA 26 35 37
Maximum Welding Current on Steel kA 20 31 32
Tooling Platen Dimensions in (mm) 4.72/5.51 (120/140) 4.72/5.51 (120/140) 4.72/5.51 (120/140)
Aerial Noise Produced dB(A) 72 75 75
Measured Conditions        
Working Stroke in (mm) 1.97 (50) 1.97 (50) 1.97 (50)
Welding Time Cycles 22 17 22
Welding Current kA 22 29 30
Working Rating (Welds per Minute) #/min 6 6 6
*May be supplied capable of operating on other voltages/frequencies. Please ask for details.      

standard=Standard =Upon request

Item
6121N
6124N
6127N
 Item
6122N
6125N
6128N
 Item
6123N
6126N
6129N
 Photo
 Description
Item 6132
Rotary selector for recalling the welding programs.
Item 6135
Cylinder 1242 daN, max stroke 100 mm, double stroke 0÷80 mm, working stroke 5÷100 mm.
Item 6133
Double stroke control device with pneumatic foot instead of key one. To be used only for spot welding when the work necessarily requires it.
  Item 73070
Additional double stage electric foot switch for the direct recalling of a different welding program.
    Item 73038
Additional double stage electric foot switch for the direct recalling of a different welding program.
Item 72628
Two-hand safety control on pedestal, adjustable height. Recomended for the operator safety according to the working requirements.
Item 6033
USB interface board.
    Item 6142
Position sensor
  Item 6142/1
Position sensor
Item 6140
Proportional valve, allows to adjust the working pressure directly from the control unit and to combine a proper pressure value to each program. It assures constant and
accurate working pressure.
Standard pneumatic circuit.
Item 6138 (for Standard Cylinder)
Item 6139 (for Cylinder 1242 daN)
Low-force squeeze, the electrode closes at a reduced force. This is particularly useful when welding weak pieces.
 Item 6138+6140 (for Standard Cylinder)
Item 6139+6140 (for Cylinder 1242 daN)
Low-force squeeze, and forging.

standard=Standard =Upon request

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