Gasket assembly and method for heat treatment on gear hub
A heat treatment method and gasket technology, applied in heat treatment furnaces, heat treatment equipment, furnace components, etc., can solve problems such as severe deformation, and achieve the effects of uniform carburized layer, good metallographic structure, and stable precision
Active Publication Date: 2013-11-20
天津天海同步科技有限公司
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Problems solved by technology
but for figure 1 The workpiece shown, the deformation after carburizing and quenching has been very serious for a long time
Method used
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[0032] Such as figure 2 , 3 As shown, the present invention provides a gasket set for heat treatment of the gear hub 8, which includes a workpiece load-bearing inner gasket 5, a workpiece outer gasket 6 sleeved on the outside of the workpiece load-bearing inner gasket 5, and the workpiece load-bearing inner gasket 5 and the workpiece outer gasket 6. There is a distance between them, and after the gear hub 8 is placed on the workpiece load-bearing inner washer 5, the workpiece load-bearing inner washer 5 is in contact with the floating plate 10 of the gear hub 8, and the workpiece outer washer 6, that is, the seam plane of the large-diameter washer, is in contact with the gear hub There is a gap at the 7 teeth of the external spline of 8, so that during the carburizing and quenching process, the influence of gravity on the deformation of the teeth can be effectively reduced. The load-bearing inner washer 5 of the workpiece and the outer washer 6 of the workpiece are annular, ...
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The invention provides a gasket assembly for heat treatment on a gear hub. The gasket assembly comprises a workpiece-bearing inner gasket and a workpiece outer gasket sleeved on the workpiece-bearing inner gasket. A distance is formed between the workpiece-bearing inner gasket and the workpiece outer gasket. The workpiece-bearing inner gasket contacts with a gear hub on the workpiece-bearing inner gasket. A gap is formed between the workpiece outer gasket and an external spline end surface of the gear hub. The invention also provides a method which utilizes the gasket assembly for material filling and is used for heat treatment on the filled gear hub. The gear hub is arranged on the gasket assembly and the gear hub filled in the gasket assembly is fed into a carburization continuous production line and then is subjected to heat treatment. The method guarantees uniformity of an integral carburization layer and good quality of a metallographic structure, effectively reduces deflection of a small workpiece subjected to carburizing and quenching, and improves a finished product precision of the workpiece by curing heat treatment parameters.
Description
technical field [0001] The invention belongs to the technical field of metal heat treatment, and relates to a washer set for heat treatment of a gear hub and a heat treatment method. Background technique [0002] At present, the carburizing and quenching treatment of high and low gear tooth seats in heavy-duty truck gearbox synchronizers is basically carried out by box-type carburizing furnaces, and the furnace can be installed in a hanging or flat-mounted manner. but for figure 1 For the workpiece shown, the deformation after carburizing and quenching has been very serious for a long time. It is mainly reflected in that the ellipticity of the workpiece is seriously out of tolerance when hanging, and the flatness of the workpiece is seriously out of tolerance when using flat delivery, especially the external spline of the workpiece will have a very large taper, and the taper exceeds 0.50 in serious cases. For the above situation, the effect is not obvious after adjusting t...
Claims
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Login to View More IPC IPC(8): C21D9/32C21D1/62C23C8/20F27D5/00
Inventor 刘继武吕源江
Owner 天津天海同步科技有限公司