INNOVATIVE THROUGH FEED INDUCTION HARDENING LOESER GmbH
This process is mainly used on hydraulic cylinders; other applications include ball screws to increase the wear resistance in the ball track and other round parts
The technology is based on the induction hardening process. Induction hardening uses eddy currents to produce heat on the surface of the work piece. Eddy currents are evoked by one or more induction coils with high frequency alternating current.
The number of induction coils used, is determined by the required through feed speed, depth of hardness and the diameter of the bars or pipes.
Specifically engineered transport system, controlled by the PLC, is designed for maximum efficiency and production. The extremely accurate and repeatable spiral movement insures consistent hardness and hardening depth throughout the complete bar.
Once process parameters are determined that produce the required hardness, hardness depth and production requirements for each bar, all parameters are then stored on the PLC and can be easily retrieved the next time this bar is processed. The work pieces can be moved manually or automatically to the next production machine, which is usually a straightenier.
After the straightening process (if required) bars are polished to the required surface finish parameters using a multiple station abrasive belt polisher. A bonded wheel (stone wheel) grinder is in most cases not capable of producing adaquate surface finish parameters required for chome plating ultimately effecting the life of the piston rod seals on a hydraulic cylinder rod.
After the straightening process (if required) bars are polished to the required surface finish parameters using a multiple station abrasive belt polisher. A bonded wheel (stone wheel) grinder is in most cases not capable of producing adaquate surface finish parameters required for chome plating ultimately effecting the life of the piston rod seals on a hydraulic cylinder rod.
This processing step is preparing the workpiece surface for the chrome plating. The processing of the surface could be quickly and automatically implemented with Loeser belt grinding systems. See our prospect "The belt grinding technology"
05 October 2011
