A design method for sand core process holes in aluminum alloy corbel castings
A design method and technology of aluminum alloy, applied in the field of aluminum alloy casting, can solve the problems of insufficient sand core weight, inability to set sand core, small cross section, etc.
Active Publication Date: 2016-09-14
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Problems solved by technology
[0004] High-speed train bogie bolster casting 7, the maximum size of the closed cavity contour exceeds 2800mm×1000mm×200mm, and it communicates with the outside world only through four circular outlets 8 with a diameter of φ85. Sand cores cannot be set, so large closed cavities cannot be directly integrally cast
In addition, there are multiple ribs intersecting horizontally and vertically in the cavity, and the cross-sectional area of the connection between the ribs is small, which is not enough to bear the weight of the sand core between the ribs
Method used
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[0019] The technical solution of the invention will be further described in detail below in conjunction with the accompanying drawings and embodiments:
[0020] See attached Figure 1~5 As shown, this kind of design method for the sand core process hole of aluminum alloy bolster casting, said aluminum alloy bolster casting refers to a large closed cavity integral aluminum alloy bolster casting 7 for high-speed trains, the aluminum alloy bolster casting 7 The maximum size of the closed cavity contour is 2800mm×1000mm×200mm, and there are multiple horizontal and vertical crossing reinforcing ribs in the cavity. It is characterized in that: the sand core 1 of the aluminum alloy corbel casting is made of high collapse PEP-SET aluminum alloy Made of resin, set 16 to 20 process hole bosses 2 with a diameter of φ127mm on the upper surface of the sand core 1. In the area of 600mm and 1200mm-1250mm, the number of process hole bosses 2 in the area of 3570mm-600mm from the centerlin...
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The invention relates to a method for designing sand core process holes in aluminum alloy bolster castings. The method adopts highly collapsible resin sand materials to make sand cores, and manufactures process hole bosses (2) on the sand cores, and passes through process hole protrusions. The platform (2) forms a process hole (9) on the overall aluminum alloy corbel casting (7), and completes the one-time molding of the large closed cavity of the aluminum alloy corbel casting (7). This design can be used in the cavity sand core Set up a positioning mechanism to fix the sand core to prevent the sand mold from floating during the pouring process. It can also be used as a sand outlet hole to clean the residual core sand in the cavity when the casting is cleaned of sand, and when repairing the welding process hole, the patch can be directly placed in the process. In the hole, it is convenient for welding, and reduces the production cost and technical difficulty of castings.
Description
technical field [0001] The invention relates to a design method for a sand core process hole of an aluminum alloy bolster casting, and belongs to the technical field of aluminum alloy casting. Background technique [0002] Large closed cavities are one of the common structures of aluminum alloy castings. These closed cavities are used to store liquids, gases and other media, and must withstand high pressure during work. Castings such as integrally cast fuel tanks, engine casings, high-speed train bogie bolsters, etc. all have a large-volume closed cavity structure, and such castings are widely used in aviation, aerospace, high-speed rail and other fields. [0003] In the early days, due to the poor collapsibility of the molding material, the closed cavity structure was cast in sections and then welded into a whole. This casting method has a large welding workload, a large welding area and a large welding heat-affected zone, and the overall casting is deformed due to large-ar...
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IPC IPC(8): B22C9/10B22C9/24B22C1/00
Inventor 洪润洲杜旭初熊艳才陈邦峰李大奎
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS