Pipe core, preparation method of pipe core, preparation method of cross beam pipe and cross beam pipe

Abstract

The invention discloses a pipe core, a preparation method of the pipe core, a preparation method of a cross beam pipe and the cross beam pipe, and relates to the technical field of casting manufacturing. The pipe core comprises two half core shells which are connected with each other in a matched mode, and the materials of the half core shells comprise ceramsite, warm core box resin and a curing agent. The wall thickness of each half core shell is uniform and unchanged. Therefore, the ceramsite, the warm core box resin and the curing agent are used for manufacturing a beam pipe core, in the process that the beam pipe core is used for manufacturing the cross beam pipe, under the effect of pouring high-temperature molten steel, the warm core box resin in the beam pipe core continuously generates character changes, in the contraction cooling stage of a cross beam pipe casting, the beam pipe core can be automatically collapsed, so that the influence of the beam pipe core on the shrinkage of a cross beam pipe can be reduced, the generation of cracks is reduced, and even, the beam pipe core has no chance to generate stress which hinders the shrinkage, so that the inner cavity of a produced cross beam pipe casting is attractive, and the crack defect is completely avoided through overall magnetic powder detection.

Description

technical field [0001] The present application relates to the technical field of casting manufacturing, in particular, to a tube core, a method for preparing the tube core, a method for preparing a beam tube and the beam tube. Background technique [0002] On the one hand, the beam connects the main support structure, on the other hand, it supports the fixing and shaking of the rocker arm, and is the main component of the mechanical transmission part of construction machinery. Since the beam needs to withstand frequent high stress during use, if the beam produces stress and cracks during the casting process, it will affect the normal operation of the machine. In addition, before the beam is installed on the construction machinery, both ends of the tubular beam part are generally sealed by welding or other means, which makes it difficult to detect crack defects. However, undetected crack defects will be partly diffused under the frequent stress of construction machinery, and...

AI Technical Summary

Problems solved by technology

However, in the prior art, during the process of cooling and shrinking of the casting of the main body of the beam, the self-hardening sand core or cold core has strong rigidity to hinder the shrinkage of the main body of the beam, and at the same time, because the main body of the beam is in the shape of an ellipse, the distribution of internal hot spots is uneven , the inner cavity of the main body of the beam will be subjected to high-strength tensile stress at high temperature, and cracks are easily generated, and after the casting of the main body of the beam is cooled, high stress remains

Since the cracks are generated on the inner surface of the beam main body, it is not only difficult to detect and weld, but also may pose a safety risk when installed and used

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