Projection Welders

General Information

Press Projection welders are ideally suited for higher force requirements, or larger parts.  They can also be equipped with t-slot platens, for rapid tool changes.

The main difference with the Press Spot welders vs the Projection style welders is the lower knee. A spot welder traditionally has a round lower arm, whereas a projection welder has a box-construction lower knee for mounting tooling and fixturing. It is common to mount t-slot platens to a projection welder to enable quick change-over of tools. Ever seen t-slot platens on a vertical mill or a drill press? This suits the same purpose.

If weld arms are used on platens, we make the arms square.  This removes degrees of freedom, improving setup time and repeatability, and adds strength. Projection welders can have square arms without platens as well, if tool changes are not required.

A “Projection Welder” is so named because many metal stampings will use weld “projections” on the part to enable multiple welds at once, or to ensure a quality weld. To weld multiple welds at a time typically takes more weld force than a traditional spot weld, so a more robust frame is required to prevent flex with the higher forces. Spot Weld’s PressRite Projection Welder uses the same robust cam-follower ram design as the rest of our line of press style welders.

A Press Projection welder excels when:

  • Welding studs or weld nuts
  • Welding stampings with multiple projections
  • Welding Stainless Steel, Titanium, or other high-force applications
  • High precision tooling is required
  • T-slot platens are required
  • Frequent tooling change-overs are necessary

The PRPP is our full size model press, RWMA size “2”.

  • 24″ standard throat depth (can be ordered from 12” – 36”)
  • 120KVA standard with 25kA max short circuit amperage;  (can be ordered with 30-150KVA, we can install any transformer to suit)
  • 5″ (127mm) bore air cylinder, generating 1900lbsf @ 100PSI (845daN @ 7bar)
  • CNC machined, 99.99% pure copper support for the upper and lower 2-1/2” square arms
  • 5RW standard 1-1/4″ diameter ejector-style electrode holders
  • The lower knee design has about 7” of vertical adjustment, allowing the deepest of parts to fit within the throat of the machine
  • Hydraulic jack mount for easy adjustment of lower knee height
  • Tapered lower knee, for fitting smaller diameter parts
  • New in 2017, the whole upper ram attaches to the frame on t-slots, greatly increasing the adjustability and overall rigidity of the frame
  • Both the upper ram assembly and the lower knee are mounted on a sliding gib, allowing ideal adjustment for various operator heights and pass-line heights
  • Robust frame design
  • Fully adjustable knee support allows greater rigidity for heavier gages of metal, but can be easily removed for welding tubes, tanks, pipes, HVAC ducts
  • Eight cam followers guide the ram, for precision, reliability, and repeatability
  • Fully rebuildable
  • Precision air system
  • Exclusive use of copper core, water cooled transformers
  • All copper is a minimum 99.9% pure, or RWMA class
  • Designed and build in the USA

The PPEX is our next larger size model, designed to fit in between the Standard size and the Heavy Duty size.

  • 24″ Standard throat depth (can be ordered from 12” – 30”)
  • 250KVA standard with 41kA max short circuit amperage;  (can be ordered with 120-250KVA, we can install any transformer to suit)
  • 8″ (203mm) bore air cylinder, generating 5000lbsf @ 100PSI (2200daN @ 7bar)
  • CNC machined, 99.99% pure copper support for the upper and lower 3-1/2” square arms
  • 5RW standard 1.5″ diameter ejector-style electrode holders
  • The lower knee design has about 6” of vertical adjustment, allowing the deepest of parts to fit within the throat of the machine
  • Hydraulic jack mount for easy adjustment of lower knee height
  • Tapered lower knee, for fitting smaller diameter parts
  • New in 2017, the whole upper ram attaches to the frame on t-slots, greatly increasing the adjustability and overall rigidity of the frame
  • Both the upper ram assembly and the lower knee are mounted on a sliding gib, allowing ideal adjustment for various operator heights and pass-line heights
  • Robust frame design
  • Fully adjustable knee support allows greater rigidity for heavier gages of metal, but can be easily removed for welding tubes, tanks, pipes, HVAC ducts
  • Eight cam followers guide the ram, for precision, reliability, and repeatability
  • Fully rebuildable
  • Precision air system
  • Exclusive use of copper core, water cooled transformers
  • All copper is a minimum 99.9% pure, or RWMA class
  • Designed and build in the USA

 


Image Gallery