Precision Micro offers a range of in-house forming and finishing technologies which complement photo etching, enabling customers to reduce their supplier base.
We offer manual and semi-automatic precision forming using standard, modular and custom form tools. Where possible, bend lines can be incorporated into photo etched components, removing the need for hard form tooling.
In-house spot welding is available for formed, 3-D components which require a permanent connection, such as nickel silver screening cans.
General forming tolerances
|Metal thickness||Positional||Angular||Internal radii|
|Soft metals up to 25mm||±0.1mm||±1º||0.5 x material thickness|
|Soft metals 25mm to 100mm||±0.2mm||±2º||0.5 x material thickness|
|Soft metals 100mm >||±0.2mm||±3º||0.5 x material thickness|
|Half-hard metals up to 25mm||±0.1mm||±1º||1.0 x material thickness|
|Half-hard metals 25mm to 100mm||±0.2mm||±2º||1.0 x material thickness|
|Half-hard metals 100mm >||±0.2mm||±3º||1.0 x material thickness|
|Full-hard metals up to 25mm||±0.1mm||±1º||2.0 x material thickness|
|Full-hard metals 25mm to 100mm||±0.2mm||±2º||2.0 x material thickness|
|Full-hard metals 100mm >||±0.2mm||±3º||2.0 x material thickness|
Electropolishing and passivation
Precision Micro offers two post-etching corrosion protection processes:
Passivation purifies the component surface and forms a micro-coating of metal oxide to protect it from corrosion. This process will not change the dimensions or overall appearance of the base metal and is generally applied to extreme environment components.
Electropolishing produces a brighter, smoother surface finish, reducing surface roughness by up to 50%. By reducing micro-crevices on the metal surface, components are up to 30 times more corrosion resistant than those which are passivated, making it ideal for medical instruments.
For components which require increased surface hardness, temperature resistance, ductility or strength, we offer heat treatment by way of hardening, tempering, annealing and normalising.
Materials can be specified with a non-reflective, dull, stain, bright, mirrored or grit finish to improve component form or function.
Available post-process surface finishes include:
- Vapour blasting
- Chemical blacking
- Chromium nitride
Bonding and brazing
Precision Micro’s innovative ‘R-Bond’ technique, which uses the photo-resist protecting the material surface during chemical etching as the bonding agent, is available for components including motor laminations.
Brazing and diffusion bonding – a process in which the atoms of two metallic surfaces are interspersed using heat and pressure – is available for heat exchanger plates, cooling plates and fuel cell plates.