For those of you who are highly technical this is the detail that matters in producing top quality helical products.
Accurate fit to shaft for efficient handling – The helix flight should click into position on the specified shaft in an efficient tight manner and without any secondary process such as grinding or cutting
Uniformity for weld procedure – Critical to “robotic welding processes” and very important to manual operations is the consistency of;
- Pitch angle – If pitch angle is not a uniform linear spiral, welding will require a variety of tracking adjustments to follow the non linear spiral
- Helix flange perpendicular to shaft – a typical incorrect helix usually causes a variety of weld angles around the helix. This will affect both the positional requirements of the weld, and consistency of both throat and root of welding between helix and shaft
- Helix internal edge parallel to shaft – the potential variability in the gap between the shaft and the edge of the inner helix edge. If not parallel, can result in a significant variation in the weld root and hence consistency and quality of weld.
- Therefore – A true pitch helix shall have;
- Flange perpendicular to shaft and;
- Uniform pitch angle