Automatic LPG Gas Cylinder Circumferential Seam Welding Machine

I. Full automatic welding line ( machinery list)

Double head circumferential seam welding machine:

Automatic Longitudinal seam welding machine

Handle/Bottom base welding line


II. Technical parameter:

A. Automatic trimming & polishing machine

This machine is used for upper/lower cap trimming, edge welding part outer polishing. The main shaft motor is 5.5KW, the polishing motor is 1.5KW.
The machine uses four column hydraulic presser structure, PLC control, loading/unloading by mechanical arm, the center mould rotation is driven by motor and gear case, the cover is driven by the top oil cylinder to locate and press the workpiece, hydraulic system drives outer blade feeding, the outer blade follows by the inner blade dish on the main shaft and cap workpiece to rotate and cutting. Side has a polishing machine, the polishing dish will enter to remove the dust on the upper cap welding area, then rotation trimming and polishing complete at the same time. The outer blade and polishing dish reset, the main oil cylinder driven slider reset, and the support plaaet will rise the upper cap and flash in place.The unloading mechanical arm moves into the center of the mould to remove the workpiecce to the middle conveyor, then transfer to hole punching machine. The inner/outer blade uses high wear-resistant high toughness die steel material, long working life, it can reuse after processing by the surface grinding machine,The inner/outer blade gap is 0mm, the distance between the cutting into outer blade and inner blade is 0.2mm.

2 set equipment has independent hydraulic station No.1 and No.4, vane pump, 11KW. Each hydraulic station feeding the oil to two sets oil cylinders of the equipment, is drive slider lifting and outer blade feeding reset, the machine working pressure set value: outer blade 9 MPa, slider (cover): 9MPa.

B. Automatic hole punching machine

This machine is used for upper cap hole punching.

The machine uses four column hydraulic presser structure, PLC control, loading/unloading by mechanical arm, the mechanical arm will quit after pushing the workpiece into the support pallet, the slider falling down is driven by the top oil cylinder, the cap enters into the lower mould, the upper mould continuous moving down to finish the hole punching, the scrap collect into the aggregate box through the lower mould center hole. The upper mould and slider delay reset, rise the upper cap in place, the unloading mechanical arm enters into the mould center to remove the workpiece to the middle conveyor, then transfer to the socket welding and polishing machine.

Equips with No.5 hydraulic station, 1 set, plunger pump. Setting pressure is 16MPa

C. Socket welding & polishing machine

This machine is used for upper cap socket welding and edge welding part polishing. Equip with Panasonic YD-350GL4 welder 1 set, water cooling welding torch 1 pcs, 8L automatic cycle water cooling tank 1 set. The main shaft motor is 0.75KW. Polishing motor is 1.5KW, equip with the grating security protection.

The machine uses four column hydraulic presser structure, loading/unloading by mechanical arm, front is socket welding, behind is inner polishing, the center mould rotation drives by the motor, adjust speed by Mitsubishi transducer. Put the socket in the upper cap center hole by manual, the top oil cylinder drives the slider moving down, clamp the workpiece, locate and press at one time. After starting the automatic working program, the mould workpiee rotates, the welding torch feeds in, and automatic arc welding. At the same time, the behind inner polishing dish moves to outside, polishing the upper cap edge welding part. The welding and polishing finish at the same time. After then, the oil cylinder reset, workpiece rises in place, the unloading mechanical arm enters into the mould center to remove the workpiece, and transfer to the handle welding machine through middle conveyor.

Equip with NO. 6 Hydraulic station, 1 set, vane pump, 5.5KW. Setting pressure: falling 4 MPa, rising 9 MPa.

D. Automatic handle welding machine, 1 set

This machine is used for upper cap hadnle welding. Equip with three sets welding torch, 3 welders finish at one time. Equip with Panasonic YD-350GL4 welders 3 sets, welding torch 3 pieces. Main shaft motor is 0.4KW, with the grating security protection.

The machine uses four column hydraulic presser structure, PLC control, loading/unloading by mechanical arm, motor drives the workpiece rotation. Manually put the handle in the upper mould center position which is fixed by the magnet, the loading mechanical arm quit after delivery the upper cap to the mould center position, the oil cylinder falling drives the upper mould and handle press the upper cap in position, the automatic working program starts, the center mould workpiece rotates, three welding torch feeding in at the same time, automatic arc welding. After finish, the oil cylinder resets, and workpiece rises in place, the unloading mechanical arm enters into the mould center to clamp the upper cap and put on the middle conveyor, then transfer to the assembly & spot welding machine.

Equip with No.7 hydraulic station, vane pump, 5.5KW. Setting pressure: pressing 4MPa, rising 9MPa.

E. Automatic joggling machine

The machine is used for lower cap trimming, joggling and outer polishing. Main shaft 5,5KW, polishing motor 1.5KW.

The machine uses four column hydraulic presser structure, PLC control, loading/unloading by mechanical arm, motor drives the center mould rotation, the top oil cylinder drive the deflectable upper presser clamp the workpiece, the hydraulic system drives the outer blade feeding in, and do lower cap rotating and joggling. Fter joggling, the outer blade reset, and main oil cylinder drives the slider reset, the support pallet rises the lower cap in place. The unloading mechanical arm enters into the mould center to remove the workpiece to the middle conveyor, then transfer to the bottom base welding machine. The inner/outer blade uses high wear-resistant high toughness die steel material, long working life.

Equip with No.2 hydraulic station, vane pump, 5.5KW. Driving the slider lifting and outer blade feeding and reset. The setting pressure: working pressure 9MPa, outer blade 9MPa, slider (cover) 9MPa.

F. Automatic bottom base welding machine

This machine is used for lower cap bottom base welding, equip with three welding torch, 6 welders could be finished at two times. Equip with Panasonic YD-350GL4 welder 3 sets, welding torch 3 piece. Main shaft motor 0.4KW, with the grating security protection.

The machine uses four column hydraulic presser structure, PLC control, loading/unloading by mechanical arm, motor drives the workpiece rotation. Manually put the bottom base in the upper mould center position which is fixed by the magnet. The loading mechanical arm quits after sending the upper cap to the mould center position. The oil cylinder falls down drives the upper mould and bottom base to press the upper cap in position, the automatic working program start, the center mould workpiece rotates, three welding torch feeding in at the same time, automatic arc welding. After welding, the oil cylinder reset, the workpiece rises in place, the unloading mechanical arm enters into the mould center to clamp the upper cap and put on the middle conveyor.

Equip with No.3 hydraulic station, vane pump, 5.5KW, setting pressure: pressing 4MPa, rising 10MPa.

G. Assembly and spot welding machine

The machine is used for assembling the upper cap and lower cap, vertical type. Air cylinder press fit equips with press head connection rod, used for both 9kg and 14kg, change the connection rod to switch. Manually put the lower cap on the platform, beside the position, put the handle opener of the upper cap opposite to the bottom base welder joint, then assembly the upper cap into the lower cap jogging part, open the manual control air valve, the above cylinder push the press head on the socket, automatic press the upper and lower cap. Check the lap joint, if necessary, use the wooden hammer to click the lap joint to make it more closer, After assembling, manual spot welding, about 2~3 welders for one circle. After welding, manually push the cylinder to the loading conveyor, the handle is in front and bottom base is in behind, the assembly and spot welding machine equips with SuperTIG-315 manual arc welder 1 set.

H. Automatic circumferential welding machine

The machine is used for circumferential welding of upper and lower cap, equip with welder vision tracking system, finish the circumferential welding automatically, full automatic and no operator, each set equips with Panasonic YD-500GS high speed welder 1 set, water cooling welding torch 1 piece, 8L circle cooling tank 1 piece. Equip with welder vision tracking system 1 set. The electrical control system uses Mitsubishi PLC control unit, pro-face color touch screen operation screen.

The machine uses horizontal double shafts structure, the main shaft and the bottom shaft is the same, air cylinder drives the feeding, opposite moving clamp is using for clamping or loosing the workpie. The main shaft drives by the speed reducer motor, adjust speed by the Mitsubishi transducer, the main shaft motor power is 0.75KW. The main shaft and bottom shaft have independent welding mould, the welding torch position can be adjusted along the cylinder axes direction, there has fine tuning in the welding torch, precision fine tuning the welding torch position. The machine head has welder vision tracking system, X/Y shaft two dimension tracking drives the welding torch, X-shaft stepping motor 6N·m, Y-shaft stepping motor 12N·m. The machine head has exhaust pipe used for concentrating and exhaust the smoke. Equip with magnet mechanical arm device, three working position loading/unloading device, loading/unloading conveyor, unloading raceway.

Note: 1.) The arc position of circumferential welding should in the same line with bottom base welder joint; 2.) Before turn off the circumferential welding machine, should turn off the vision tracker first, then turn off the circumferential equipment power.


III. Equipment running in customers' plant



IV. Advantage