Bring the Steel Industry the Right Kind
of Automation for Joining Steel Coils

Steel Mill Solutions    

For over 40 years Newcor has been supplying steel manufacturers and steel service plants with end-to-end overlap welding machines and systems for joining steel coils in continuous processing lines.

Much of the successful welding technology and processing that has been developed for these coil applications was originated by Newcor... and a great deal of it has been patented. Many machines have been operating successfully for over 30 years.

Today, these machines and systems are available in a variety of standard designs focusing on the specific needs of the steel mill and the steel service plant.

Overall Design Features of Newcor Coil Joiners

Mash Seam Welders

Newcor SWP (Shear, Weld, Planish) Mash seam welders are designed and built for end-to-end welding of coils and strip for soft or hard rolled steel, low to medium grades of carbon steel, and weldable grades of stainless steel. Typically, these coils require end-to-end joining prior to a variety of subsequent continuous processing operations which include galvanizing, tinning, annealing, bright annealing, electrolytic cleaning, pickling, recoiling, tension leveling, polishing and slitting.

The welding equipment can be provided in a variety of mechanical and electrical configurations, Optional equipment is available for your specific processing and product requirements. Various levels of manual and automatic electrical sequencing controls and interfaces are available to optimize integration of equipment into the processing line.

Schematic shows steel strip aligned and held for welding and planishing by dual weld and planish wheels.

Optional Equipment

• Looping Tables
• Hole Punch Assembly
• Notchers

Strip Width. . . . . . . . . . . . . . . . . . . . .  up to 72 in.
Matl. Thk . . . . . . . .   0.006 in. min 0.187 in. max

C-Frame Welders

Manual - The C-Frame style coil joiner is designed to be used in coil joining applications where the entry and exist coil edges do not need to be trimmed and where buildup at the coil joint is not of major concern. In operations, the coil edges are centered by the operator and overlapped 0.50 in. to 0.75 in.

The machine automatically places a series of spot welds or a continuous resistance weld across the width of the coil.

This manual C-Frame welder seam welds 57-in. wide stainless steel.

Upper and lower weld wheel assemblies with fiber optic edge detectors.

Automatic - The Newcor C-Frame welder can be designed with full automatic operation. Included are motor-controlled strip centering, alignment paddles and automatically adjustable overlap weld pressure regulators.

The weld programs and setup are done automatically through a personal computer with a lookup table for weld schedules.

The operator or host computer simply downloads material specifications to the machine computer. This machine functions without operator assistance.

Automatic system has a PC which allows the operator to setup and run the machine from the control panel.

Pictured here is a C-Frame with looping table and two notchers.

O-Frame Welders

Newcor O-Frame welders are designed and built for end-to-end welding of coils and strip prior to continuous processing operations such as galvanizing, tinning, annealing, bright annealing, electrolytic cleaning, pickling, recoiling, tension leveling, polishing and slitting.

Materials processed include soft or hard rolled steel, low and medium grades of carbon steel and weldable-grades of stainless steel. These shear, weld and planish (SWP) machines are

used where material build-up at the weld joint is important. Material build-up is controlled to 10% of parent metal. Tensile strength of the weld joint is 100% of parent material.

The Newcor SWP O-Frame machines are available in two different types: AC Double Pass Weld & Planish and DC Single Pass Weld & Planish.

Strip Width. . . . . . . . . . . . . . . . . . . . . up to 72 in.
Matl. Thk . . . . . . .  0.003 in. min.    0.187 in. max.

Newcor AC dual pass shear, weld and planish (SWP) machine seam welds cold rolled stainless steel. Newcor AC dual pass shear, weld and planish (SWP) machine seam welds cold rolled stainless steel.

Quick-Change 12 in, diameter weld wheels and carbine planishing wheels are featured on AC machine designs. Quick-Change 12 in, diameter weld wheels and carbine planishing wheels are featured on AC machine designs.

AC Double Pass Weld & Planish

Typical operation sequence:

1. Clamp tail
2. Shear tail square
3. Remnant removed
4. Head contacts stop gate
5. Align head
6. Clamp head
7. Form loop
8. Shear head square
9. Overlap head and tail
10. Weld
11. Planish
12. Open clamps
13. Start line
14. Reset

DC Single Pass Weld & Planish

The welding and planishing operations are performed in a single stroke. As a result, these strip welders greatly reduce overall cycle time of the welding operation by minimizing strip stoppage time, minimizing coil accumulator storage capacity and maximizing operating line throughput.

A direct coupled DC motor drives the travelling carriage up to 40 feet per minute. Encoders eliminate limit switch set-up when changing strip widths.

Newcor’s shear designs are cylinder operated and use crank arms to maintain parallelism.

Optional Equipment

Current Collectors

As an added service to the steel industry, Newcor designs and builds a proprietary line of "Current Collector" units used to carry current to plating system roll stands.

As replacement units the Newcor design claims double the wear life because of a unique silver contact bearing design. This bearing design was originally developed for use with Newcor seam welders with great success.

Current collector with recirculating oil and heat exchanger package. Current collector with recirculating oil and heat exchanger package.