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Heat treatment method capable of righting shape of multiple block-cast steering frames stacked together

A heat treatment method and bogie technology, which are applied in the field of orthopedic heat treatment of thin-walled frame structure castings, can solve the problems of easy stress, large temperature difference with ambient temperature, and high orthopedic cost, so as to save costs, shorten production cycle, and avoid internal effect of stress

Active Publication Date: 2014-06-25
LIAONING FU-AN HEAVY INDUSTRY CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

This conventional orthopedic method has a complicated process and high orthopedic costs.
And before the heat treatment after orthopedics, the difference between the temperature of the casting and the ambient temperature is relatively large, and stress is likely to occur during heating or cooling, which affects the quality of the casting

Method used

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  • Heat treatment method capable of righting shape of multiple block-cast steering frames stacked together
  • Heat treatment method capable of righting shape of multiple block-cast steering frames stacked together
  • Heat treatment method capable of righting shape of multiple block-cast steering frames stacked together

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings, but it should be pointed out that the implementation of the present invention is not limited to the following embodiments.

[0023] See Figure 1-Figure 5 , a heat treatment method for multi-piece stacking orthopedic cast bogies, by reserving an appropriate amount of deformation, the orthopedic is carried out by counterweights during the heat treatment process, including the following steps:

[0024] 1) Mark the deformation line on the marking platform on the bogie, and mark the deformation of the upper and lower parts based on the parting line;

[0025] 2) Place the kiln pillow on the heat treatment furnace trolley, hoist the bogie to the heat treatment kiln, and stack 3 bogies. It is necessary to ensure that the bottom bogie is not deformed, and the deformation in the middle is within 5mm;

[0026] 3) According to the amount of deformation, an orthopedic gap is rese...

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Abstract

The invention relates to a heat treatment method capable of righting shape of multiple block-cast steering frames stacked together. Three steering frames are stacked together, appropriate deformation is reserved, and shape righting is carried out by virtue of a counter weight in a heat treatment process; and thermal insulation material is placed in a weak wall thickness region on the surface, so as to prevent the uppermost steering frame from being deformed due to nonuniform heating or cooling inside and outside during the heating or cooling. The heat treatment method provided by the invention has the advantages that shape righting is carried out by directly utilizing an opportunity of stress eliminating heat treatment after welding, and dimensions can meet the requirements of a drawing only by once shape righting; cost of a shape righting machine is saved, a production cycle of the steering frames is shortened, and the shape righting is completed only within heat treatment time; and the defect that a cast produces internal stress at an ambient temperature is overcome.

Description

technical field [0001] The invention relates to an orthopedic heat treatment method for castings with a thin-walled frame structure, in particular to a multi-piece stacked orthopedic heat treatment method for a cast bogie. Background technique [0002] With the rapid development of science and technology, the speed and carrying capacity of diesel locomotives have been significantly improved, and their safety, stability and economy have become increasingly important. The bogie, that is, the chassis of the diesel locomotive head, is one of the most important parts of a railway vehicle. It directly bears the weight and load of the vehicle body, guides the vehicle to run along the railway track, ensures that the vehicle passes through the curve smoothly, and has the function of slowing down the vehicle when it is running. Bring vibration and impact, so the safety and stability of the bogie also directly determines the safety and stability of the vehicle. [0003] The structure ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/00
Inventor 王海泉李方志杨程坤许冀鑫林红龚汝长
Owner LIAONING FU-AN HEAVY INDUSTRY CO LTD