Processes
Busbar bending
Flatwise and edgewise forming, minimum radius by temper, springback, tooling marks and bend-sequence planning.
Two things separate a good bend from a bad one, and neither is the machine's nominal force. The first is minimum radius, which is set by the material's temper: EN 13601 designates soft annealed copper as R220, half-hard as R240 and hard as R290, and as temper hardens the smallest radius the outer fibre will take without cracking grows with it. The second is springback. Bending is elastic recovery over plastic deformation, so the part relaxes when the tool releases: springback rises with the ratio of yield strength to elastic modulus and with the ratio of bend radius to thickness. That is why a harder temper needs more overbend to land on the same finished angle, and why a compensation table keyed by material, thickness and temper — verified against a first article — is the only reliable way to hold an angle across a production run.
Machines
EMAC-BB-H12
Hybrid hydraulic 3D busbar bending machine, 400 kN, ±0.1°
EMAC-BB-S12
Servo 3D busbar bending machine, 400 kN, ±0.1°, no hydraulics
SMART-303CNC-S
300 kN all-in-one punching, shearing, bending and forming machine
SMART-603CNC-S
600 kN all-in-one busbar processing machine, 260 × 20 mm
SMART-603CNC-6S / 8S
600 kN all-in-one machine with 6 or 8 station turret
BPM-303CNC-6S / 8S
350 kN standard three-in-one busbar processing machine
Technical background
Bending
Springback compensation in busbar bending
How to predict and cancel springback in copper busbar bending: the governing ratios, a worked calculation, overbend by EN 13601 temper, and CNC offset tables.
12 min read
Standards
Which busbar standard applies to your job
A decision tree from product type, voltage class and destination market to the governing standard set, with each standard placed at its actual scope boundary.
14 min read
Materials and finishing
Copper temper and minimum bend radius
How EN 13601 tempers R220, R240 and R290 set the minimum bend radius of copper busbar, how to read a mill certificate, and when annealing is the wrong answer.
10 min read
Software and CAM
From DXF to a busbar the machine can actually cut
Layer conventions, DXF version traps, flat-pattern K-factor, bend-line annotation and the tolerance stack between a CAD drawing and a finished copper bar.
11 min read
Standards referenced
Request a quote
Pricing, configuration and machine selection for busbar processing. An engineer replies within one business day, with no obligation.