Hugging-bearing box body casting mold and casting method adopting the same

Abstract

The invention provides a hugging-bearing box body casting mold and a casting method adopting the same. The hugging-bearing box body casting mold comprises an upper mold with a horizontal upper closed surface, a lower mold with a horizontal lower closed surface, a casting core and a casting system for pouring molten steel, wherein the upper mold and the lower mold are assembled to form a cavity with the same structure of the hugging-bearing box body, an opening portion which belongs to the cavity and is opposite to the hugging-bearing box body is arranged in the lower mold, the upper closed surface and the lower closed surface relatively fit together to form a mold joint, the mold joint passes through the horizontal center line of the cavity, and two flange which are arranged on the upper mold and opposite to the hugging-bearing box body in the cavity respectively are provided with dead heads. According to the invention, the feeding efficiency of the dead heads is greatly raised, thus the defects of shrinkage cavity, shrinkage porosity and the like are reduced, the quality of the casted hugging-bearing box body is raised, and crack is prevented.

Description

technical field [0001] The invention relates to casting technology, in particular to a casting mold for a bearing box and a casting method using the casting mold for the bearing box. Background technique [0002] The bearing box is an important part in the transmission part of an electric locomotive. Its box mechanism includes a cylindrical side wall and an opening along the direction of the cylindrical generatrix on the side wall. The two ends of the side wall are respectively fixed with round shaped flange. The structural characteristics of the bearing box determine that its manufacturing process is casting. [0003] figure 1 It is a schematic diagram of the casting process of the bearing housing in the prior art. figure 2 yes figure 1 side view. Such as figure 1 and figure 2 As shown, the casting mold of the bearing box in the prior art includes an upper casting mold and a lower casting mold, and the casting parting surface 11 of the upper casting mold and the lo...

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Problems solved by technology

[0004] The design of the casting mold used in the casting of the bearing box in the prior art facilitates the production of the casting mold and subsequent cleaning. However, the bearing box cast by such a casting mold has many shrinkage cavities, shrinkage porosity, etc. Defects, especially at the position where the side wall 13 transitions to the flange 14 (confirmed by magnetic particle inspection and ultrasonic inspection of the product), these casting defects will easily cause cracks to appear in these positions, and the cracks will directly endanger driving safety , therefore, it is necessary to improve the casting process of the bearing housing to improve the quality of the cast bearing housing

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