At the GrindTec 2018 exhibition earlier this year, Vollmer launched its CHX 840 grinding machine. Capable of sharpening the tooth face and top of circular saw blades in one set-up, the machine is also tailored to the requirements of sharpening specialists and sawmill operators that have to continuously re-sharpen circular saws.

The machine is suitable for machining carbide-tipped circular saw blades with a diameter up to 840mm. With five CNC-controlled axes, the CHX 840 can machine saw blades with all common tooth geometries. This also applies to sawing with axial angle and group toothing.A transverse feed pawl with pneumatic lifting also permits machining of clamping segments and clamping rings.

Vollmer hasmade the CHX 840 available with different automation levels to reduce machining and set-up times. For example, the machine has an optional automatic set-up process, which consists of running in the saw blade, diameter detection as well as an acoustic sensor for touching. With the integrated sensor system of the feed pawl, the input of the tooth pitch is no longer necessary, and the automatic setting of the hook and clearance angle avoids adjustment errors.

The HS automation solution ensures automatic loading of the CHX in order to realise unmanned operation of up to seven hours. The programming and preparation of the saw blade stack is possible during machine operation. Thanks to a saw blade stack height of up to 180mm, the automatic machine loading can hold up to 25 circular saw blades. As saws are stacked with intermediate layers, teeth and blade damage can be avoided.
For further information www.vollmer-group.com