The dynamics of many drives with 50,000 strokes per day is very high. This applies, for example, to the handling units of the nailing station where the cover boards of the pallets are nailed. The machine itself removes all required wooden parts from the magazines and nails them together. The positioning of the deck boards is done by servo drives. The linear guides must be able to withstand the dusty environment and alternating loads because the moving ends attached to the axes move up and down when they remove a board from the magazine. Added to this are the continuous vibrations caused by nailing.
The drylin bearings from igus prove their worth in linear drives that have to operate highly dynamically under heavy loads. Dry-operating drylin linear guides with iglidur liners ensure the precise guidance of the axes, which have diameters of 30 to 50 mm, which are ideally suited for the given conditions. The drylin pillow block bearings are also used in other plants in combination with hardened steel shafts. This is not the optimum friction combination recommended by igus, but it offers a significantly longer service life in this application. 4.5 million working cycles under unfavourable conditions. In Krenzer's experience, these linear guides have a service life of around three months. That doesn't seem like much at first. However, if you multiply 50,000 strokes by 90 days, this results in 4.5 million working cycles and that with dirt, high dynamics and alternating loads. And, most importantly: With other types of bearing arrangement, such as ball bushings and recirculating ball bearing guides, which Krenzer had experimentally used in other plants under similar conditions, the service life is even shorter. In addition, the guides operate maintenance-free under the unfavourable environmental conditions, and Krenzer is also very satisfied with the precision that the drylin axes achieve.
The dry-operating drylin pillow blocks prove their worth in many applications where other drive and guidance systems in linear technology do not offer a convincing service life.
Dust, swarf, dynamic movements and alternating loads: these are the conditions under which drylin linear guides must prove their worth in the pallet production lines at Krenzer.
The drylin pillow blocks are also used for the feeding and exact positioning of the cover boards.
Snow shovel effect: drylin linear guide at a feeding station
The dry-operating plain bearings also prove their worth in vertical movements on transfer and stacking units.