Internal gear box casting structure and method

A casting structure and gear box technology, which is applied to casting molding equipment, casting molds, casting mold components, etc., can solve the problems of scrapped castings, cracks, segregation, etc., and achieve the goal of improving the pass rate, reducing cracks, and reducing the loss of waste products Effect

Active Publication Date: 2020-07-03
AECC AVIATION POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a casting structure and casting method of an internal gear box to solve the problems of cracks, slag inclusions, looseness, segregation defects, and serious scrapping of castings during casting production.

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  • Internal gear box casting structure and method
  • Internal gear box casting structure and method
  • Internal gear box casting structure and method

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Embodiment Construction

[0037] The present invention is described in further detail below in conjunction with accompanying drawing:

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. structure and operation, and therefore cannot be construed as limiting the present invention; the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be construed as indicating or implying relative importance; in addition, unless otherwise Clearly stipulated and limited, the terms "installation", "...

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Abstract

The invention discloses an internal gear box casting structure and method. The casting structure is characterized in that a bottom pouring type pouring system is adopted, and the lower part is provided with a bottom layer runner. In the improved pouring system, an upper layer supplementary runner is arranged on the upper part of the root part of a casting riser, so that the temperature gradient during solidification of a casting can be adjusted; the feeding effect of the riser is improved; and meanwhile the local overheating phenomenon is improved. Through the implementation of the casting structure, metallurgical defects such as cracks, loosening and slag inclusion in the casting production process are overcome; the yield of the casting is improved by 50 percent; the waste loss is reduced; and the cost is lowered.

Description

【Technical field】 [0001] The invention belongs to the technical field of aluminum alloy sand casting, and in particular relates to a casting device and a casting method for an internal gear box. 【Background technique】 [0002] For the casting of internal gear box seat for aero-engine, it is the key part of a new type of engine to withstand the high temperature working environment. The structural size of the casting is as follows figure 1 As shown, it is a thin-walled structure; the maximum outer dimension is 320mm×172mm, which is divided into two layers of inner wall and outer wall. The main body wall thickness is 4.1mm. . The chemical composition of the casting is shown in Table 1. The material is ZL208. This alloy contains many elements, has excellent high-temperature mechanical properties, and has high room temperature strength. The casting is finally inspected by X-rays and fluorescence, and no cracks are allowed. , cold shut, more serious porosity and flocculent segre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/08B22C9/02B22C9/22
CPCB22C9/02B22C9/082B22C9/22
Inventor 苗莉萍卢兵兵张曼曼冯继斌赵彦辉雷丹覃佳栋吴娟利
Owner AECC AVIATION POWER CO LTD
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