02/03/2021 – Producing spoke blanks
Rolling instead of swaging
The booming e-bike market has led to a growing demand for butted spokes, i.e. spokes that are thicker at one or both ends. AMBA’s new gauge reducing machines achieve throughputs of up to 40 pieces per minute in spoke blank production – many times higher than the rates achievable by conventional machines.
Before running into the rolling unit, the wire is straightened in a roller straightener. © AMBA
Thanks to the high-speed slides of the gauge reducing machine, throughputs of up to 40 spokes per minute can be achieved. © AMBA
Before running into the rolling unit, the wire is straightened in a roller straightener. © AMBA
Servo-controlled ball screws actuate the slides that pull the wire through the various processing stages of the machine. © AMBA
Servo-controlled actuation shafts perform the radial movement of the two roll pairs positioned at 90° relative to one another. © AMBA
The new-generation machines produce double-butted spokes with a middle section of only about 1.5mm in diameter. © AMBA