Ultrasonic Wire Welding Machine for 0.75–20 mm² Copper Splices WM-711

Name: Ultrasonic Wire Welding Machine for 0.75–20 mm² Copper Splices WM-711
Brand: Wiromac
SKU: WM-711

CE Certified HS Code 8515.80 0.75–20 mm² 0.75–20 mm² splice range

The WM-711 welds stranded copper wires into solid metallurgical splices by 20 kHz ultrasonic vibration — no solder, no flux, no splice bands. Its 3,000 W generator covers gathered cross-sections from 0.75 to 20 mm², the joint class used in automotive, EV and appliance harness splicing. Frequency tracking is fully automatic, so changing the welding horn needs no manual retuning, and the English touchscreen shows current, power, time and amplitude live for every weld. A foot pedal starts the semi-automatic cycle while the operator holds the wire gather in place.

Specifications

Function	Ultrasonic metal welding of stranded copper wire splices
Power	3,000 W
Working frequency	20 kHz
Welding cross-section range	0.75 – 20 mm² (total gathered section)
Operation	Semi-automatic — foot pedal start
Frequency tracking	Fully automatic, no retuning after horn change
Display	English touchscreen with live current, power, time and amplitude
Weld head guidance	Precision linear guides
Protections	Frequency and overcurrent protection, adjustable during welding
Generator stability	Stable output under supply-voltage fluctuation
Dimensions	480 × 420 × 180 mm
HS Code	8515.80 (common reference — final classification confirmed by your customs broker)
Certification	CE (certificate provided with shipment)

Key features

Cold metallurgical bond in one press — replaces solder pots, flux fumes and crimp-band stock for wire-to-wire splices up to 20 mm² total
Automatic frequency tracking means horn changes without an engineer — swap tooling and keep welding at rated output
Live readout of current, power, time and amplitude gives every splice a numeric signature for process audits
Generator holds output steady through factory voltage fluctuation, so first-shift and night-shift welds match

What it processes

Multi-wire splice joints in automotive, EV and motorcycle wiring harnesses
Copper gather welding in appliance looms and motor lead assemblies
Replacing solder splices where flux residue or heat damage is unacceptable

Suited for: wire-to-wire copper splices with a total gathered section of 0.75–20 mm² — the splice work inside automotive, EV and appliance harnesses where solder and crimp bands cost time and consumables. Not suited for: terminal attachment — for that, pick the WM-713 ultrasonic terminal welding machine, the wire-to-terminal counterpart of this splicer for sections under 30 mm² — nor soldering or tinning, which live with the other wire soldering and welding machines in this category.

Send 2–3 meters of each wire in your splice combination and we weld your actual joints on video — including a peel-back of the weld nugget — before you commit. Splice quality is a core requirement on an EV wire harness line.

Engineering knowledge

Choose and troubleshoot this process

Ultrasonic Wire Welding Defects: Causes and Corrective ActionsTroubleshoot weak wire splices, cut strands, excessive flash, incomplete bonding, unstable weld energy, tool marking and conductor contamination.
How to Choose an Ultrasonic Wire Welding MachineChoose ultrasonic wire welding equipment by conductor material, gathered cross-section, splice geometry, weld power, tooling, recipe control and acceptance testing.
Wire Soldering Defects: Causes and Corrective ActionsTroubleshoot non-wetting, excessive solder wicking, bridging, burnt insulation, unstable tinning depth, residue and contaminated wire solder joints.

Neither machine quite fits? New configurations reach our application engineers before they reach the catalog. Tell us your material and process; we will confirm what we manufacture and support, then recommend the right configuration. Get a tailored recommendation →

WM-711 — common questions

What splice sizes can the WM-711 weld?

Any wire combination whose total gathered cross-section falls between 0.75 and 20 mm² — for example several 0.5 mm² signal wires into a 2 mm² feed, or two 8 mm² power leads. If your joints run larger, a 32 mm² class version is available on request.

Does changing the welding horn require recalibration?

No. Frequency tracking is fully automatic, so after a horn or anvil change the generator finds resonance itself — no manual frequency adjustment. Frequency and overcurrent protection limits can even be trimmed while welding.

What is it not designed to do?

It welds copper to copper — it does not solder, tin or attach terminals, and plastic parts need a plastic welder instead. For tinning and solder-based joining, browse the other machines in our wire soldering and welding category.