SHAFT HARDENING
- It can perform induction heating hardening on shafts of various specifications, models and shapes
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- Surface hardening prevents shafts from failing during service. Shafts are typically hardened by induction hardening. There is a variation in the method of hardening that impacts resulting stresses and distortion.
Single-shot induction shaft hardening
- Single-shot induction shaft hardening systems use one component held statically or rotated in the coil and a predetermined heat period followed by either a flood quench or drop quench after the whole area has been heated simultaneously. This method is often used when no other method can achieve the desired results, for example when hardening the flat faces of hammers, or hardening complex-shaped tools or when manufacturing small gears.
- Single-shot induction shaft hardening methods are also more efficient at hardening shafts than progressive traverse methods when it comes to production time. It may be advantageous in certain complex geometries to use coils that are able to create longitudinal current flow in the component rather than diametric flow.
Traverse induction shaft hardening
- Transverse hardening systems consist of passing the workpiece through an induction coil gradually and quenching it afterward with a spray or ring. Axle shafts, excavator bucket pins, steering components, power tool shafts, and drive shafts are all shaft-type components where traverse hardening is extensively used. Ring-type inductors, which normally have a single turn, are used to feed the component. Depending on the generator’s power and frequency, the widest turn will be determined by traverse speed and traverse speed. When quenched, this creates a hardened surface layer through the movement of the moving band of heat. According to the requirements of the application, the quench ring may either be an integral part of the following arrangement or it may be combined with both. With varying speed and power, shafts can be hardened along their entire length or just in specific areas, and shafts with splines or steps can be hardened as well. When hardening round shafts, it is common to rotate the part during the process to eliminate any variations resulting from concentricity variations.
- In addition to paper knives, leather knives, lawnmower bottom blades, and hacksaw blades, traverse methods are also used in the production of edge components. Hairpin coils or transverse flux coils are normally used in these applications. They sit over the edge of the component. A spray quench is followed by progressing the component through a coil and nozzles or drilled blocks.
- The progression through the coil can be achieved in many ways, including vertical and horizontal systems. Positional control, switching, monitoring, and setting are typically handled by a digital encoder and a programmable logic controller. All the time, it is important to control and maintain consistency in the speed of traverse, since variations will affect the depth of hardness and the hardness value.
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