Method and Casting for Preventing Oval Deformation of Large Cylindrical Castings
A casting, cylindrical technology, applied in the direction of casting mold, core, casting mold composition, etc., can solve the problems of motor shell casting deformation, large difference of 2mm, not meeting processing requirements, etc., and achieve good casting size and high promotion. effect of value
Inactive Publication Date: 2016-04-13
CRRC GUIYANG CO LTD
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Problems solved by technology
[0003]The current casting method is to directly make a mold according to the size of the motor shell, and the casting of the motor shell is seriously deformed, especially the straight cylindrical part , the caliber of the straight cylinder is elliptical, the major axis is 850mm, the minor axis is 835mm, and the size difference is 15mm, which is too different from the 2mm required by the customer, which does not meet the processing requirements.
Method used
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Embodiment
[0025] Embodiment, take 97 motor casings as example. One end of the 97 motor housing is a straight cylinder with a height of 346mm and an outer diameter of 844±4mm, which is a large cylindrical casting.
[0026] During specific implementation, the straight cylinder at one end of the 97 motor housing is at the bottom of the mold, and the mold can be a wooden mold or a metal mold. Just add a ring belt with a width of 50mm and a thickness of 15mm at the corresponding part of the mold.
[0027] After completing the casting of the casting, the casting can be clamped on a lathe, and the annular cast rib 4 added in order to prevent elliptical deformation during casting is cut off. Processed 97 motor housing 1 such as image 3 and Figure 4 shown.
[0028] Principle of the invention
[0029] Utilizing the radial stability of the annular object, an annular casting bead is arranged at the end of the straight cylindrical part of the casting, and the radial deformation of ...
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Abstract
The invention discloses a method and a casting for preventing elliptical deformation of a large cylindrical casting. The method is to cast a group of annular casting bars on the inner wall of the mouth of the straight cylinder of the large cylindrical casting, and prevent the large cylindrical casting from elliptical deformation through the stability of the annular casting bars, so as to meet the casting requirements of the large cylindrical casting. After adopting the method of the present invention, the outer diameter of the straight cylinder of the 97 motor casing can be controlled between 844.5 and 845mm, the ellipticity error is 0.5mm, the casting size is very good, and the ellipticity error of 2mm fully meets the customer's requirements requirements, and ensured that product development was completed on schedule. Annular casting bars are very effective in preventing the deformation of rotary castings (cylinder castings), and have high promotional value.
Description
technical field [0001] The invention relates to a method for producing elliptical deformation of a large cylindrical casting and the casting, belonging to the technical field of casting processing technology of large cylindrical parts. Background technique [0002] The 97 motor casing is a key part of the American electric locomotive motor, which plays an important role in driving safety. There are many local heat joints on the casting of the motor housing, and the stress of each part is different during the cooling process after casting, which leads to the deformation of the casting. In particular, one end of the motor casing casting is a straight cylinder, which is a large cylindrical casting body. The wall of the straight cylinder is provided with a long rectangular window, which makes this part weaker and greatly reduces the stability of the straight cylinder part. property, increasing the deformation of the straight cylindrical part. The height of the cylindrical p...
Claims
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IPC IPC(8): B22C9/24
Inventor 欧孔平
Owner CRRC GUIYANG CO LTD