Mechelonic Engineers Pvt. Ltd.

Powai, Mumbai, Maharashtra

Multi-Head Spot Welder

Multi-Head Spot Welding Machine is specially designed for welding floor tiles fabricated assemblies. The machine is equipped with ten welding heads, five welding transformers, microprocessor based control, pneumatically actuated welding heads and job guides.

Operation:The operated loads the pre-tacked assembly on the welding machine and position the job for the first set of spots on flange. He then initiates the welding heads descend to weld and retract after welding, . The operated then indexes the job forward to align with the next set of spots to be made. This sequence is repeated till all the spots are made. The determines the welding heads, which are actuated in three groups.

The ten welding heads are divided into three groups. The middle six heads are in one group. The two outer heads (first from each end) are in one group and the immediate next heads are in group. A selector switch(s) determine which heads are actuated when the foot-switch is initiated. This permits selected group from being activated when the corresponding spots are not required.

Construction:The main frame of the machine is “D” frame type and is of heavy, rigidly reinforced welded steel construction. The welding heads are on the upper arm. The lower arm provides the reaction force required and the bottom shunt or electrode. The machine frame combines a compact streamlined appearance with maximum resistance to mechanical deflection. The transformers are housed inside the machine frame. The control is either mounted on the machine frame or free standing and easily accessible.

Welder Control:PLC based welder control, with logic and sequence control, complete with thyristor contactor is provided. The welding parameters are settable and can be easily adjusted to suit requirement. The control has fault annunciation capability.

Cooling systems:

The transformers, electrodes and thyristors are water cooled and provided with inlet manifold and outlet manifold. Alternately, the discharge to an open drain pot, for visual observation of flow, can be provided.

Electrode Control System:

Heavy–duty pneumatic cylinders actuate the electrodes. The cylinders are operated through solenoid valves by the weld control. Compressed air at 2 kg/cm2 to 7 kg/cm2 acting through the pneumatic cylinders provides the electrode force. Machine is provided with air filters, regulators with gauge, lubricator etc, together with internal air connections.

Adjustments of Welding Force:

The welding force is adjusted by setting the air pressure in the welding head cylinder wit the help of the regulators.

Press type air operated Spot Welders are designed for extra ordinary versatility and are available with different styles of welding head arrangements.

These air operated welders are designed for high speed production work to meet the needs of a vast number of metal fabrication shops. Automatic feed mechanism with X-Y axis and Rotary movements with PLC could be supplied for fast production. A variety of electrodes and toolings can be fitted to render them suitable for spot welding, simple projection welding, electro-brazing, hot riveting, electro-forging and upsetting.

Fully solid state electronic controls (Microprocessor based or CMOS based) are available for using with machine in order to obtain consistent and accurate weld results on a wide range of materials at a high speed automatic operation.

These machines are designed and manufactured conforming to the Indian Standard Specification No.IS:4804 Part I and III or as per guidelines of JISC-9303 by a team of highly experienced engineers in welding technology.

Specifications ;

Standard Ratings : 25, 35, 50 and 75 KVA @ 50% duty cycle.

Type: Air operated stationary press type Spot welders with pneumatic cylinder mounted directly.

Construction: Robust construction, streamlined appearance with maximum resistance to deflection.

Transformer enclosed in the main frame and pneumatic accessories mounted on the side of the machine and upper and lower arms mounted directly on to the body. Operating control station mounted on the machine clearly visible and within easy reach of the operator.

Standard Throat Depths: 300, 450, 600, 750 and 900 mm (Machine with other throats also available on request). Welding Transformer: Transformer conforms to IS: 4804 Part-I and RWMA Standards, water cooled, class 'F' insulation with thermoswitch protection for overloading.

Current Control: Welding current adjustable from 50 to 100% by means of a tap change links.

Cooling System: Transformer, Electrode holders, welding electrodes are water cooled.

Electrodes / Dies Toolings: One Pair of Morse Taper 2 straight Electrodes supplied as standard with the machine. Machine can be provided with custom-designed spot welding electrodes or welding dies to suit various sizes and shapes of work pieces, and suitable jigs and fixtures for holding, guiding and indexing of the work-piece as required at extra cost.

Electrode Control System: Upper electrode actuated by a heavy duty 2-way cushioned pneumatic cylinder controlled by an electrically operated 4-way solenoid valve. Compressed air at 1.5 Kg/cm.sq. - 5.6 kg/cm.sq. (20 to 80 psi) acting on the pneumatic cylinder provides electrode force. Machine provided with air filter, air lubricator, air pressure regulating valve, air pressure gauge.

High Lift Facility (Optional at Extra Cost): "High Lift" (retractable upper electrode) facility shall be provided by means of special cylinder. A hard/foot operated air valve causes the upper electrode to lift to the top most position for easy introduction of the job into the throat of the machine.

Dual Pressure System (Optional at Extra Cost) : Dual pressure system shall be provided by means of two sets' of regulating and controlling devices and the necessary air circuits. Working in conjunction with special control units, this facility would enable application of a higher force on the job being welded at any point during the weld cycle.

Controls: Appropriate Control will be incorporated with the machine as per requirement.

Press type air operated Projection Welders are designed for high speed production work to meet the needs of a vast number of metal fabrication shops. A variety of electrodes and toolings can be fitted to render them suitable for projection welding, cross wire welding, electro-brazing, hot riveting, electro-forging and upsetting.

Fully solid state electronic controls (Microprocessor based or CMOS based) are available for using with machine in order to obtain consistent and accurate weld results on a wide range of materials at a high-speed automatic operation.

These machines are designed and manufactured conforming to the Indian Standard Specification No.IS:4804 Part I and III by a team of highly experienced engineers in welding technology.

Specifications:

Standard Ratings: 50, 75, 100, 150, 250 and 300 KVA @ 50% duty cycle.

Type: Air operated, stationary press type projection welding machine with pneumatic cylinder mounted directly on the upper arm.

Construction: Main frame of the machine is of heavy, rigidly reinforced welded steel construction, streamlined appearance with maximum resistance to deflection. Transformer enclosed in the main frame and pneumatic accessories mounted on the side of the machine and upper and lower arms mounted directly on the frame. Current is carried from the upper transformer terminal to the upper platen tooling through a 'U' shaped laminated copper flexible link designed to provide rolling action as the welding head reciprocates during operation. The welding head is of antifriction type. The pneumatic controls mounted on the side of the machine. The operating control station mounted on the machine is clearly visible and within easy reach of the operator.

Standard Throat Depths: 300, 450, 750 mm.

Welding Transformer: Transformer conforms to IS:4804 Part-I and RWMA Standards, water cooled, class 'F' insulation with thermo switch protection for overloading.

Current Control: Welding current adjustable from 50 to 100% by means of a tap change links.

Cooling System: Transformer, Bus Bars, Platens, Electrode and Thyristors are water cooled, followed by discharge to an open drain-pot for visual observation of flow.

Water Flow Switch (Optional at Extra Cost): Water flow switches may be provided with the machine to ensure adequate flow of the water for Transformer and Thyristor circuits while operating the machine.

Platens: Constructed from high quality copper alloy accurately machined, having 'T' slots to international standards.

Dies Toolings: Machine can be provided with custom-designed projection welding dies to suit various sizes and shapes of work pieces, and suitable jigs and fixtures for holding, guiding and indexing of the work pieces, as required, at extra cost.

Electrode Control System: Upper electrode actuated by a heavy duty 2-way cushioned pneumatic cylinder controlled by an electrically operated solenoid valve. Compressed air at 1.5 Kg/cm2 - 7.0 kg/cm2 (20 to 100 p.s.i.) acting on the pneumatic cylinder provides electrode force. Machine provided with air filter, air lubricator, air pressure regulating valve and air pressure gauge.

High Lift Facility (Optional at Extra Cost): "High Lift" (retractable upper electrode) facility shall be provided by means of special cylinder. A hard/foot operated air valve causes the upper electrode to lift to the top most position for easy introduction of the job into the throat of the machine. The retraction as well as the working stroke is adjustable within a range.

Dual Pressure System (Optional at Extra Cost) : Dual pressure system shall be provided by means of 2 sets of regulating and controlling devices and the necessary air circuits. Working in conjunction with special control units, this facility would enable application of a higher force on the job being welded at any point during the weld cycle.

Air Reservoir (Optional at Extra Cost): An air reservoir of suitable capacity shall be provided to minimise pressure drop during welding.

Adjustment of Welding (Electrode) Force: By adjusting the air pressure regulator provided on the machine.

Adjustment of Throat Gap: By vertical adjustment of lower arm.

Weld Initiation: By means of operator's foot switch / hand operated switch connected to a low voltage safe initiating circuit.

Controls: Appropriate Control will be incorporated with the machine as per requirement.

Service Requirements

Power Supply: 415 V, single phase, 50 cycles, Machine suitable for connection to 2 lines of 3 phase supply. Main supply cables 2-core type, disconnect switch with fuses of size recommended to be provided by the customer.

Compressed Air: Customer to provide air supply at recommended flow volume at a minimum pressure of 5.6 kg/cm2 (80 p.s.i.).

Cooling Water: Cooling water at minimum 2.1 kg/cm2 pressure and temperature below 30oC at recommended flow rate to be provided by the customer.

Press type Spot Welders are designed for extra ordinary versatility and are available with different styles of welding head arrangements. These air operated welders are designed for high speed production work to meet the needs of a vast number of metal fabrication shops. Automatic feed mechanism with X-Y axis and Rotary movements with PLC could be supplied for fast production.

A variety of electrodes and toolings can be fitted to render them suitable for spot welding, simple projection welding, electro-brazing, hot riveting, electro-forging and upsetting.

Fully solid state electronic controls (Microprocessor based or CMOS based) are available for using with machine in order to obtain consistent and accurate weld results on a wide range of materials at a high speed automatic operation.

These machines are designed and manufactured conforming to the Indian Standard Specification No.IS:4804 Part I and III or as per guidelines of JISC-9303 by a team of highly experienced engineers in welding technology.

Specifications :

Standard Ratings: 25, 35, 50 and 75 KVA @ 50% duty cycle.

Type: Air operated stationary press type Spot welders with pneumatic cylinder mounted directly.

Standard Throat Depths: 300, 450, 600, 750 and 900 mm (Machine with other throats also available on request).

Electrodes / Dies Toolings: One Pair of Morse Taper 2 straight Electrodes supplied as standard with the machine. Machine can be provided with custom-designed spot welding electrodes or welding dies to suit various sizes and shapes of work pieces, and suitable jigs and fixtures for holding, guiding and indexing of the work-piece as required at extra cost.

Electrode Control System: Upper electrode actuated by a heavy duty 2-way cushioned pneumatic cylinder controlled by an electrically operated 4-way solenoid valve. Compressed air at 1.5 Kg/cm.sq. - 5.6 kg/cm.sq. (20 to 80 psi) acting on the pneumatic cylinder provides electrode force. Machine provided with air filter, air lubricator, air pressure regulating valve, air pressure gauge.

High Lift Facility (Optional at Extra Cost) : "High Lift" (retractable upper electrode) facility shall be provided by means of special cylinder. A hard/foot operated air valve causes the upper electrode to lift to the top most position for easy introduction of the job into the throat of the machine.

Dual Pressure System (Optional at Extra Cost) : Dual pressure system shall be provided by means of two sets' of regulating and controlling devices and the necessary air circuits. Working in conjunction with special control units, this facility would enable application of a higher force on the job being welded at any point during the weld cycle.

Controls: Appropriate Control will be incorporated with the machine as per requirement.