Induction quenching method for crawler belt plate of crawler crane and device
A crawler crane, induction hardening technology, applied in the direction of quenching device, process efficiency improvement, furnace, etc., can solve the problems that it is difficult to guarantee the quenching hardness and the uniformity of the thickness of the hardened layer, and the hardened layer cannot be formed.
Inactive Publication Date: 2012-07-25
SANY HEAVY IND CO LTD (CN)
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Problems solved by technology
Compared with other heat treatment methods, flame quenching has lower production cost, is easy to operate, and is easy to implement, but it is not easy to ensure the uniformity of quenching hardness and hardened layer thickness
Moreover, flame quenching generally quenches the entire surface of the track shoe, but because the wear degree of different parts of the track shoe is not consistent during work, especially the meshing surface, guide surface and bearing surface are high-wear parts, flame quenching is used The method cannot make the surface of the mating surface, the guide surface and the bearing surface form a hardened layer that meets the requirements
Method used
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Embodiment 1
[0054] The specification of the track shoes to be processed is SCC type, and the material is ZG30CrMnNiMo. The equipment used in this embodiment is a GCK12200 intermediate frequency quenching machine tool.
[0055] The depth of the hardened layer on the surface of the track shoe is determined according to its service conditions. In this embodiment, the depth of the hardened layer is required to be 3-5mm for the meshing surface, and 5-8mm for the depth of the hardened layer required for the guide surface and the bearing surface.
[0056] Penetration heating is adopted in this embodiment, even if the depth D of the hardened layer and the penetration depth Δ of the current thermal state satisfy: D<Δ, preferably D=Δ / 2.
[0057] Taking the guide surface and support surface as an example, when 8mm≥D≥5mm, the thermal current penetration depth is 16mm≥Δ≥10mm.
[0058] The current thermal state penetration depth Δ and the current frequency satisfy the formula (I):
[0059] ...
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Abstract
The invention provides an induction quenching method for a crawler belt plate of a crawler crane. The method comprises the following steps of: performing surface quenching treatment on a gearing face of the crawler belt plate by using a first induction heating device; and performing surface quenching treatment on bearing faces and guide faces of the crawler belt plate by using a second induction heating device, wherein the crawler belt plate comprises a bottom plate, the gearing face, and two bearing faces and two guide faces which are contacted with a supporting wheel and a guide wheel respectively, the first induction heating device comprises a first induction heating coil for heating the gearing face, and the second induction heating device comprises a second induction heating coil forheating the two guide faces and the two bearing faces. Compared with the prior art, the method has the advantages of performing surface quenching treatment on the gearing face, the guide faces and the bearing faces which are high abrasion parts of the crawler belt plate. By the method, effective quenching treatment can be performed on the gearing face, the bearing faces and the guide faces, and hardening layers which meet the requirements are formed on the gearing face, the bearing faces and the guide faces.
Description
technical field [0001] The invention relates to the field of metal heat treatment, in particular to an induction hardening method and device for crawler shoes of a crawler crane. Background technique [0002] Crawler cranes are one of the indispensable large-scale equipment for modern engineering and construction. The crawler traveling mechanism is an important working unit of the crawler crane, which is composed of a driving wheel, a guide wheel, a supporting wheel, a drag chain wheel, a track shoe and a track frame. The working principle of the crawler walking mechanism is that the engine power is transmitted to the driving wheel through the reduction mechanism, and then the traction force is transmitted to the bottom surface through the track shoe meshed on it, and the vehicle is driven forward by the reaction force of the bottom surface. [0003] The track shoe is one of the main bearing parts of the crawler crane. When the crane is working, the track shoe will not only...
Claims
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IPC IPC(8): C21D1/10C21D1/667C21D9/00
CPCY02P10/25
Inventor 蔺国栋彭清莲王文明
Owner SANY HEAVY IND CO LTD (CN)