Both ‘conventional’ and laser-based tool manufacturing machines have for some time been used to produce the sometimes very small (1.8mm) diameter PCD and CBN tools needed by ‘smartphone’ manufacturers to machine the glass and ceramic components inherent in today’s devices.
Indeed, machines from both Walter and Ewag, especially Ewag’s Laser Line Ultra and Laser Line Precision models, have consistently proven effective in the manufacture of successive generations of new smartphones – producing tools from just 1.8 up to 8mm diameter, to machine the plastics or metal cast housings.
Very often — according to Walter Ewag UK,
a member of the United Grinding Group — the diecast moulds are being machined by tools produced by Walter Helitronic tool grinders/erosion machines and Ewag laser-based tool manufacturing machines.
Warwickshire-based Walter Ewag UK says: “These so-called 3C tools (tools for computer, communication and consumer electronics) now also embrace PCD types.
“On the Apple iPhone 6, for instance, the bevel on the aluminium housing is machined using PCD profile cutters produced on Ewag laser-based machines.
“On the iPhone X, however, stainless steel is integrated into the housing frame so CBN cutters (also produced on Ewag laser machines) are used rather than diamond-coated tools.”
“With new demands on design and technology, materials such as glass and ceramic are increasingly being used. “These materials offer a number of advantages, including superb reception quality.”
“In principle, metal housings shield wave transmission in wireless communications so, in devices with a metal housing, this is used for the antenna. It therefore must be shielded from other integrated metal parts, and this is achieved with plastic strips.
Such shielding is not required on smartphones with a glass or ceramic housing and, of course, glass and ceramic are more sustainable than plastic, allowing for greater freedom of design.
But due to their brittleness, hardness and low thermal conductivity, glass and ceramic place specific demands on the tools needed to machine them.
As a result, Ewag regularly receives customer requests for 3C tools with highly specific geometries – tools that are capable of producing very small internal radii and shoulders, as well as tiny turned parts.
In conventional tool manufacture, such tools would have to be manufactured and assembled from a variable number of parts but, using Laser Line Ultra machine, for example, they can be produced fully automatically and in one set-up.