Bar feed systems for centerless grinding – robust, flexible, and customized to your requirements
We offer systems in three sizes for workpiece diameters up to 50 mm, up to 150 mm, and up to 400 mm as a “modular system,” customized to the required workpiece length (up to 15 m) according to customer requirements. The equipment can be individually configured with magazines, measuring devices, workpiece circulation systems, etc.
Grinding bar stock is a special case of centerless external cylindrical grinding, which poses particular challenges.
A suitable centerless cylindrical grinding machine, a set of bar tables for loading and unloading the workpieces and optional additional equipment such as a workpiece magazines, workpiece circulation systems, measuring devices, etc. are required. The grinding machine must meet specific criteria that are not always necessary for other workpieces.
A fixed grinding center is crucial.
The grinding wheel and regulating wheel move on their own slides, so that the workpiece does not have to be moved laterally when the grinding wheel wears. Without this fixed grinding center, the workrest blade and bar tables would have to be moved and readjusted constantly, reducing the productivity considerably. This criterion is met by machines such as the Lidköping 630 or Ebert C-3070.
The height adjustment of the workrest blade is important for minimizing setup and changeover costs.
The operator can roughly adjust the height of the bar tables, while fine adjustment between the workpiece and workrest blade can be carried out conveniently, quickly, and accurately using the height adjustment mechanism. This feature is typical of Lidköping machines, and the Ebert C-3070 even offers a servo axis for maximum reproducibility.
Of course, the machine must meet other criteria such as sufficient drive power, good infeed accuracy and high stability, especially of the regulating wheel drive.
As workpiece dimensions increase, bar feeding tables become increasingly important for the grinding result. They must be height-adjustable and swivelable as a whole. The individual roller blocks, each of which drives the workpieces with two rollers, must be adjustable in angle and height. Rollers and drive elements must be wear-resistant and the overall construction must be stable.