Hydraulic Pressure Welders
CHY400 Hydraulic Cold Welder for 8.0 mm Copper Rod
Rectangular strip as well as round wire, copper to 8.00 mm and aluminium to 15.00 mm on a 660 kg frame.
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UN Series Electrical Butt Welding Machines
Resistance butt welding from 1 kVA to 40 kVA for steel aluminium brass and pure copper.
Product Overview
UN Series Electrical Butt Welding Machines
The UN series is the resistance answer where cold welding cannot go — ferrous metal. Six capacities from UN-1 at 1 kVA to UN-40 at 40 kVA cover steel from 0.6 mm to 4.5 mm and aluminium from 0.5 mm to 20.0 mm. A shell structure transformer keeps power consumption down, and the larger models step 380 V down to a 36 V secondary at the work.
Specifications
- ProcessResistance butt welding
- ModelsUN-1, UN-3, UN-10, UN-16, UN-25, UN-40
- Rated capacity1 kVA to 40 kVA
- Supply voltage220 V, 380 V, or 380/36 V by model
- Steel range0.6 mm to 4.5 mm across the series
- Aluminium range0.5 mm to 20.0 mm across the series
- Brass range0.5 mm to 18.0 mm across the series
- Pure copper range0.5 mm to 18.0 mm across the series
- TransformerShell structure, low power consumption
- Pressure systemSpring on UN-1 to UN-10, lever on UN-10 to UN-25
- InstallationSmall in size, usually needs no fastening down
Key Benefits
What This Model Gives You
High Power Utilisation
The shell structure transformer gives a good welding result at lower consumption than an equivalent open-core machine.
36 V at the Work
UN-16 and above transform 380 V down to 36 V, which is both safe and good practice on a shop floor.
Spring or Lever Pressure
UN-1 to UN-10 apply pressure by spring, UN-10 to UN-25 by lever, so the setting suits the section.
Small and Portable
Small in size and usually needing no fastening down, so the welder goes to the block.
Application Scenarios
Where It Is Used
- Wire drawing and nail making
- Wire and cable and enamelled wire
- Wire rope manufacturing
- Stainless steel product manufacturing
Industries
Problems It Solves
Why Buyers Specify It
- Steel wire cannot be cold pressure welded
- A bad coil joint jams the header on a nail line
- Export orders arrive with a supply voltage the machine was not built for
Compared With Other Models
Cold pressure welders join non-ferrous wire with no heat at all, which is always the better joint where it applies. The UN series exists for the metals cold welding cannot take — steel and stainless — and for shops that need one machine covering ferrous and non-ferrous.
Model and Capacity Table
| Model | Supply V | Rated kVA | Steel mm | Aluminium mm | Brass mm | Pure Copper mm |
|---|---|---|---|---|---|---|
| UN-1 | 220 | 1 | 0.6-2.0 | 0.5-3.0 | 0.5-2.5 | 0.5-2.0 |
| UN-3 | 220 | 3 | 1.5-3.5 | 2.0-6.5 | 2.0-5.5 | 2.0-5.0 |
| UN-10 | 380 | 10 | 1.8-3.5 | 3.0-8.0 | 3.0-7.0 | 3.0-6.0 |
| UN-16 | 380/36 | 15 | 1.5-3.0 | 3.0-12.0 | 4.0-12.0 | 3.0-10.0 |
| UN-25 | 380/36 | 25 | 1.8-3.5 | 4.0-16.0 | 5.0-14.0 | 4.0-12.0 |
| UN-40 | 380/36 | 40 | 2.0-4.5 | 5.0-20.0 | 6.0-18.0 | 4.0-18.0 |
Use Guide
How It Is Set Up and Run
- Pick the model from the section table, not from the machine price.
- Set the current and the pressure for the material and section.
- Clamp both ends with equal protrusion and close.
- Dress the upset and check the joint before returning the coil to the line.
Customisation and Supply
What Is Built to Order
Dies to Your Wire
Dies are manufactured for wire between 0.10 mm and 25.0 mm to suit round or profile wire and rod, to the customer's own specification, at -1% / +2% of the wire diameter.
Your Electrical Supply
On the motorised and hydraulic machines, operating voltage is built to the industrial supply of the destination country. State voltage, phase and frequency with the order.
Export Packing
Machines are packed in a strong wooden or plywood case as stated per model. Carry cases are supplied with the portable welders and the DA10.
Related Products
Others in Electrical Butt Welders
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SGT450 Copper Rod Pointing Machine for 8.0 mm Rod
Points 8.0 mm copper rod and 13.0 mm aluminium rod down to a φ1.00 mm outlet on a 450 mm block.
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Cold Welding Dies
CHY Welding Dies for Hydraulic Pressure Welding Machines
Matched die sets for CHY100 CHY200 CHY400 and CHY700, covering copper 1.00-13.00 mm and aluminium 1.00-25.00 mm.
View specificationsFAQ
UN Series Electrical Butt Welding Machines Questions
Which model for 3 mm steel wire
UN-10 covers steel 1.8-3.5 mm at 10 kVA on 380 V; UN-25 covers the same steel range at 25 kVA if larger non-ferrous sections are also run.
What is the secondary voltage
The UN-16, UN-25 and UN-40 run 380/36 V. The UN-1 and UN-3 run from 220 V and the UN-10 from 380 V.
Can it be built for our country's supply
Yes. For export orders the butt welding machine is built according to the requirements of overseas customers.
Does it need a foundation
Usually not — the machines are small and normally need no fastening down.
Quote the UN Series Electrical Butt Welding Machines
Give the wire material, the diameter and the country the machine will run in, and the quote comes back with the die set and the voltage build already decided.