The conventional way
To date limitations of imagination and design have meant that current fasteners for sheet metal have a genealogy that can be traced back to there roots as far back as 1860. This genealogy has constrained thinking and left us with production problems and costs that are well documented.
Assembly implications
Machine, thread forming thread tapping screws
- Minimal thread engagement with conventional sheet metal screws which can cause the thread to strip
- Not designed to accept thick gauge material
- Not designed as a re-usable fastener
- Malformed thread underneath the head
- Insertion torque can lead to Repetitive Strain Injury
Nut & Bolt
- For assembly, access to both sides of joint required
- May require ‘patching’ technology or anti vibration spring washers
- Spiked earthing washers will be required for earth continuity
- A minimum of two parts solution
Nut inserts / Weld nuts
- “Nut inserts” are only as strong as the sheet metal material
- Special insertion equipment or welding required and can be costly to maintain
- Insertion equipment if not correctly set up can cause assembly problems, by allowing the insert to spin and not grip the panel
- Two part solution
- Welding flash or paint masking maybe be required
Tooling, Tooling inserts and fasteners described are elements of the INDUSTRIAS LOTU, S.A. design, and is protected by patent. All rights reserved
