Platform Traceless Laser Spot Welding Machine Automatic Range Hood Shell Cooktop Panel
automatic laser spot welding machine
,traceless laser welding for range hood
,laser welding machine for cooktop panel
PDKJ rocker-arm laser spot welder delivers mark-free, repeatable welds on 0.2-5mm stainless, carbon steel, aluminum and galvanized sheet. Counter-balanced arm covers 1000×600mm (customizable), double-pendulum torch and infrared aiming ensure precision. 1500W/2000W/3000W, 220V single-phase. Ideal for range hood shells and cooktop panels.
1500W / 2000W / 3000W — a platform spot welder with a counter-balanced rocker arm and our self-developed double-pendulum torch. The arm swings out over a 1000 × 600 mm tooling plate and holds the head square to the work, so every spot lands in the same place and leaves no mark on the visible face.
The point of the arm is that it takes the operator out of the weld. A handheld gun leaves angle, stand-off and pressure to the wrist, and on 1–2 mm panel work that variation is exactly what shows up as uneven spots and the occasional mark. Here the linkage sets those three things, so the first spot and the two-hundredth are welded the same way — by the same person or by the next shift.
The cabinet carries the laser source, the control electronics and a perforated tooling plate; the rocker arm carries the welding head. Because the arm is counter-balanced and runs on a parallel linkage, the head stays square to the plate across the whole working area — which is what makes a mark-free, repeatable spot possible on thin sheet metal.
A counter-balanced arm sweeps the entire tooling plate, so a metre-wide panel is welded in one clamping instead of being turned and re-set. Welding range and cabinet size are both customisable to the part you actually make.
The dual-swing-head torch is our own design. It spreads the heat across the nugget instead of drilling one hot point, so the bond is strong and the panel stays flat. Because the head is built in-house, its geometry is matched to your joint rather than to a catalogue.
Welds are made from the inside face. The visible side keeps its finish, so the grinding and polishing stage disappears from the line — and so does the risk of polishing through a brushed or mirror surface.
Aiming and positioning are done by infrared, not by eye. The operator sees exactly where the next spot will land before the head comes down, which is also what keeps the pattern repeatable from the first shift to the tenth.
All three power levels run on a standard 220 V supply. Main-engine draw is 2000 W, 2500 W and 3500 W respectively — no three-phase upgrade and no separate transformer at the wall.
The welded joint holds to the base material across the full thickness range: 0.2–5 mm on stainless and carbon steel, 0.2–4 mm on aluminium and galvanized sheet. A pull test on a welded strip tears the strip beside the weld, not through it — see Weld Quality below.
- The weld has to disappear on the show face — cabinets, door panels, appliance fronts, elevator cladding.
- One operator runs the same panel all day and the spot pattern has to repeat exactly.
- The part is too big to hold comfortably under a bench gun, but small enough to sit on a 1000 × 600 mm plate.
- You want to take grinding and polishing out of the process, not just speed them up.
- The panel is large, heavy or already fixed in place — a handheld laser welder goes to the work instead of bringing the work to the plate.
- The joint runs as a seam rather than a spot and you need continuous penetration — that is platform seam welding.
- The stack is thick section, where a spot weld is not the joining method at all.
- Every part is a one-off with a different shape, so a fixture and a plate layout would be rebuilt for each job.
Every station is the same four building blocks: a mobile cabinet, a perforated tooling plate, the rocker arm on its vertical post, and the welding head with its fibre carrier. What changes between machines is the arm length and the plate layout — both are quoted to your part.
Cabinet 1000 × 600 × 800 mm (customisable) on four braked castors, so the station can be wheeled to the bench or locked down as a fixed cell. Double doors give access to the laser source and the control electronics, and the plate on top carries clamp posts anywhere across the 1000 × 600 mm field.
The side panel carries the cooling fans and the service access, which keeps maintenance away from the work surface. The fibre cable runs in an overhead carrier so it never drags across the workpiece or catches on a clamp, and the arm pivots on a post at the rear corner — that offset is what gives it the full sweep.
Most of what changes between two orders is the plate, not the machine: hole pattern, clamp positions, and any locating pins or stops the part needs. If the part has a profile that will not sit flat on a plain plate, we build a nest for it and quote the tooling with the machine, so it arrives ready to run rather than as a second project.
No renders and no stock photography — these are the machines as they are built and tested, from three sides, with the arm, head, control panel and tooling plate up close.
The arm is a counter-balanced parallel linkage. It holds position wherever the operator leaves it, instead of dropping onto the work the moment it is released — which matters when both hands are needed to line a panel up.
The head rides on a Z-axis column with a fine adjust, so the stand-off is set once per job and then locked. The control panel stores the pulse recipe — energy, spot pitch, dwell — under a part number, which turns a changeover into a recall instead of a re-dial.
The tooling plate is perforated on a regular grid: clamp posts, stops and locating pins go anywhere on it, and the plate can be re-drilled or replaced when the product changes.
The same cabinet and rocker arm carry a 1500W, 2000W or 3000W laser source. Pick the level by the thickest material you need to spot weld — everything else on the machine is identical.
| Parameter | 1500W | 2000W | 3000W |
|---|---|---|---|
| Input power | 220 V / 1500 W | 220 V / 2000 W | 220 V / 3000 W |
| Bonding strength to base material | Good | Good | Good |
| Welding gun model | Double-pendulum torch | ||
| Laser wavelength | 1064 nm | 1064 nm | 1080 nm |
| Power consumption of main engine | 2000 W | 2500 W | 3500 W |
| Aiming and positioning | Infrared | ||
| Welding capacity — aluminium | 0.2-2 mm | 0.2-3 mm | 0.2-4 mm |
| Welding capacity — carbon steel | 0.2-3 mm | 0.2-4 mm | 0.2-5 mm |
| Welding capacity — stainless steel | 0.2-3 mm | 0.2-4 mm | 0.2-5 mm |
| Welding capacity — galvanized sheet | 0.2-2 mm | 0.2-3 mm | 0.2-4 mm |
| Rocker-arm welding range | 1000 × 600 mm (customisable) | ||
| Overall size | 1000 × 600 × 800 mm (customisable) | ||
0.2–3 mm stainless and carbon steel, 0.2–2 mm aluminium and galvanized. Draws 2000 W from a single-phase line. The right level for cabinet doors, small enclosures and nameplate-thin panels, where the whole stack stays under 3 mm of steel.
0.2–4 mm stainless and carbon steel, 0.2–3 mm aluminium and galvanized. Draws 2500 W. Most kitchen equipment, appliance fronts and elevator trim sit inside this window, and there is headroom left for the occasional thicker bracket.
0.2–5 mm stainless and carbon steel, 0.2–4 mm aluminium and galvanized. Draws 3500 W, still single-phase. For 3–5 mm chassis work, structural brackets and heavy door frames; the 3000W source runs at 1080 nm rather than 1064 nm.
Pick the level by the thickest stack you need to join, not by the size of the panel — a 1500W machine covers a two-metre door perfectly well as long as the sheet is thin. If you are between two levels, take the higher one: pulse energy can always be turned down, but it cannot be turned up.
The spot is made with the head square to the plate and the parts clamped flat, which is what keeps galvanized coatings and polished stainless clean at the weld face.
Stainless steel. The 1064 nm source couples well to 304 and 316. Because the spot is made from the inside face, a brushed or mirror finish on the outside is never touched, and no filler wire means no colour mismatch to polish out afterwards.
Carbon steel. 0.2–5 mm on the 3000W model. The lap joint is held by a row of spots rather than a continuous seam, which keeps distortion down on long panels and leaves the surface flat enough to paint.
Galvanized sheet. Zinc boils at a far lower temperature than steel melts, which is why a wide, slow heat input burns the coating back from the weld. The double-pendulum head keeps the pulse short and spreads it, so the zinc immediately around the nugget stays intact and the spot needs no touch-up.
Aluminium. Supported from 0.2–4 mm on the 3000W model. Aluminium conducts heat away quickly, so the pulse recipe is set per alloy and thickness rather than copied over from steel.
A spot weld is only useful if it holds and if the other side of the panel is still presentable. These four frames show both — the nugget row on the weld side, the untouched face on the reverse, and a pull test on a welded strip.
Pull test. A welded lap strip is pulled until it fails. The strip tears beside the weld rather than opening the joint — that is what a sound spot looks like, and it is the check we run on the sample we send you.
Nugget size and pitch. Every spot in the row comes out the same diameter at the same spacing, because energy and dwell are read from the stored recipe instead of being set by hand for each part.
Reverse face. The back of the panel shows no burn-through and no heat tint, so a visible surface goes to finishing as it is. Welding from the inside is the whole reason the grinding step can be removed.
Repeatability. One recipe runs for the whole batch: the first part and the last part are welded identically, and so are the parts made after a shift change.
Real jobs, filmed at the bench: mirror-finish stainless, galvanized sheet and door panels, carbon steel, and a swing-arm run on 1.5 mm stainless plate. Click any cover to open the full video.
Wherever a stainless or galvanized panel has to be joined from the inside and still look untouched from the outside — that is where a rocker-arm spot welder earns its floor space.
Typical jobs on this machine: a stainless sink rim welded to the bowl from underneath, so the rim edge reaches the customer untouched; a galvanized distribution box where 0.6 mm sheet is spotted to its frame without burning the coating off; an appliance front panel spotted to an inner stiffener before paint; a brushed elevator cladding panel spotted from the back and hung with no visible fixing.
What changes from one industry to the next is the fixture, the plate layout and the arm length. The weld itself does not change — which is why the same platform covers kitchenware, enclosures and architectural metal without a different machine for each.
