Electro-Mechanical Fabrications

EMF is a high-quality medium to heavy engineering company with fabrication and CNC cutting capability. EMF helps customers take a concept through to a finished article. Designs are drawn and modelled in autoCAD or solid-works. Projects range from small profile-cut fabrications to large one-off purpose made items. We control the entire process in house, from engineering, cutting, rolling, pressing, fabrication, welding, hydraulics and where required, final machining, blast and paint.

When necessary site visits can be arranged. EMF endeavours to ensure the needs of our customers are met and is proud of our continued customer support.

The plate metal is either supplied by us or alternatively purchased separately by our customer. Either way, as a result of economic and availability considerations, plates are frequently sourced from various suppliers and are then able to be brought together for processing in one location.

CNC Profile Cutting

We operate two machines, a CNC flame (oxygen-LPG) cutting machine and a CNC plasma cutting machine. Profiles up to 40 mm thick are generally plasma cut and steel profiles over 40 mm thick are flame cut.

The plasma machine is additionally fitted with a servo drill head and arc-writer. The plasma CNC machine is also fitted with a Hypertherm HPR260XD plasma unit. The unit is fitted with Hypertherm’s patented true hole technology for mild steel up to 20mm. This gives significantly better hole quality than has previously been possible using plasma.

The main benefits are:

• bolt hole quality is delivered automatically without operator intervention
• narrows the gap with laser hole quality making the plasma process suitable for many jobs previously cut with a laser
• virtual elimination of hole taper
• ding is reduced and biased to the outside of the hole
• delivers true ‘bolt hole’ quality

Steel up to 65mm can be cut with the HPR260. The drill head can be used to create a pilot hole to allow a plasma cut start hole on a thicker plate. The arc-writer can be used to mark inside fold lines or positions where items are to be attached and also to engrave identifying text on a part. Our Profile Department is serviced by a 3 tonne overhead gantry.

• Bed Size 12400 x 3200mm4000 x 2000mm
• Bed Type DryWater
• Plate Thickness Up to 40mm MS/25mm Al/32mm SS25 -100 Mild Steel

Press Brake

• Maximum folding length:4100 mm
• Distance between columns:3540 mm
• Distance from blade to column:350 mm
• Maximum pressing force:220 Tonnes
• Automatic crowning
• (The maximum foldable length for a particular material and thickness will be provided on request)

Guillotine

• Maximum cutting length:3100 mm
• Maximum material thickness (steel):6 mm

Rolling

• Roller length:1500 mm
• Maximum material thickness (steel):6 mm

Punching and Shearing

• 70 Tonnes capacity
• Capable of punching and shearing up to 20 mm thick mild steel
  (Limitations on hole size and shearing length will be provided on request)

Welding

• Four MIG welding bays with 1-tonne hoists
• One MIG welding bay with a 2-tonne hoist
• One large welding or assembly area with a 5-tonne hoist

Additional capacity (including stainless steel and aluminium welding) is available through an established network of associated companies.

Drawing Options
Drawings for profile cutting can be supplied by one of the following options:

• Nested plates as .DWG or .DXF files
• Individual profiles as .DWG or .DXF files
• Individual profiles as fully dimensioned .PDF files
• Individual profiles as fully dimensioned paper drawings

Note:

• .DWG and .DXF files should be drawn to a scale of 1 mm = 1 drawing unit. One dimension should be included in each file so the scale can be double-checked.
• The type of material, thickness and quantity required must be specified for each profile or nest of profiles.
• The software we utilise to process files for profile cutting is also a powerful tool for manual and automatic nesting of parts onto plates.

EMF is involved in the design of a number of one-off projects. EMF caters for client design requirements by working with the client in the design and fabrication process.

Projects include:

• Hydraulic grapple for an 80-tonne excavator for Steel Serve at NZ Steel.
• 160-tonne Quick-Hitch for a PC1600 excavator.
• 20-foot container tilter designed by EMF
• 20-foot flat deck container unloader suitable for Swing-lift load/unload.
• 30-tonne demolition grapple manufactured for A-WARD Attachments (seen in the Christchurch rebuild).