Automotive seal gap measurements

Automotive closures are a complex area of engineering, requiring tight geometries to ensure that performance remains consistent over what can be a very demanding product life.  As well as external, visible gaps, it is also important to measure the internal closure gap dimensions where door seals will ultimately be fitted. 

    DSC00896aseal gap   DSC01209 afriction block case

GapGun measures external body gaps and seal gaps with one instrument, to afford a reliable and simple solution.

Working with a large automotive manufacturer in the UK, Third Dimension developed a method to measure the seal gap void between automotive bodies and doors to provide accurate, repeatable and fast measurement data using a custom made, patented fixture called a friction block.

GapGun can measure seal gaps from 0mm to 50mm with a measurement capability of better than 0.2mm (0.008”). This allows you to control tolerance bands of +/-0.5mm (+/-0.02”) and provides R&R scores better than 15%.

“Third Dimension took care of the metrology so that I could focus on making cars to specification on schedule.” Metrology Supervisor of leading premium car manufacturer.

This highly successful and simple measurement is made by setting the friction blocks all the way around the car body seams where the door seal would be inserted. The friction blocks are attached either mechanically by a thumb screw or located using magnets. The operator extends the arm on the friction block, the door is closed compressing the arm down into the gap and the GapGun is then used to measure the height of the arm using a simple alignment standoff. The GapGun seal gap measurement kit comes with the simple measurement standoff and a collection of friction blocks. 

Key advantages:

Easy to use and integrate
GapGun can be easily integrated in the manufacturing process for quality inspection with minimal training. The method of measurement is quick and easy, requiring no additional specialist training. With results collected in seconds by the same system as external gaps, there’s no need to collate the results from multiple systems, saving time and reducing the risk of error.

Fast and flexible
The GapGun can be used to measure both external and internal gaps in seconds, for a smooth un-interrupted workflow. With interchangeable measurement heads, clip on battery pack for extended portable use, optional stand offs for positioning and configurable tools, GapGun is totally flexible to your needs.

Affordable
Significantly lower in cost than a complex, electronic alternative measurement solution ensures return on investment is achieved very quickly.

Robust and simple
Operators find GapGun simple and intuitive to use and friction blocks add no cables, wires, leaf springs or other damage prone components. Furthermore, the GapGun with its shock protection head cover and seal gap measurement blocks are extremely robust, meaning that they can be used on the shop floor for years, with no risk of expensive and inconvenient system breakdown.

Proven
The solution is well proven in automotive applications, accurately measuring seal gaps from 0mm to 50mm controlling tolerance bands of +/-0.5mm (+/-0.02”), with unsurpassed R&R scores better than 15%.

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