Integral gating system of certain airplane cabin door casting
An integral pouring and casting technology, applied in the direction of mold, core, mold composition, etc., can solve the problems of low filling pressure head and filling speed, low filling capacity and low tissue density
Active Publication Date: 2015-07-15
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Problems solved by technology
The gravity pouring method is that the alloy liquid is freely poured and formed under the action of gravity. The operation is simple and convenient, and the production efficiency is high. It can be used for mass production of castings with low metallurgical quality requirements. The filling speed is small, so the filling ability and the structure density after pouring are not as good as the anti-gravity casting method
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[0018] The technical scheme of the present invention will be described in further detail below in conjunction with accompanying drawing and embodiment:
[0019] See attached Figure 1~5 As shown, the overall pouring system of a certain type of aircraft door casting, the outline size of the aircraft casting is 2225mm × 1200mm × 340mm, the casting includes an outer frame A, and 11 reinforcing ribs B are distributed along the width direction in the outer frame A , the cross-section of rib B is "I" shape, the thickness of the upper and lower beams of "I" shape is 6.5mm, the thickness of the middle longitudinal beam is 3mm, there are six bosses C on the outer frame A, two of which are bosses Platform C is located on one end face of the fourth and eighth reinforcement ribs B on the same side from the left, and it is characterized in that the gating system of the casting includes:
[0020] The first layer of runners 3 arranged below the casting mold 7, the first layer of runners 3 i...
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The invention discloses an integral gating system of a certain airplane cabin door casting. The gating system is suitable for the large-scale integral thin-wall cabin door casting with the overall dimension of 2225mm*1200mm*340mm and the wall thickness of 4mm-6mm; the integral gating system adopts an antigravity casting method. The gating system comprises a first layer of cross gates (3) below a casting mould (7), inner gates (4) connected with the first layer of cross gates and the casting mould (7), a vertical barrel gate (5) connected with branch gates (10) and an external mould for forming six bosses C on the casting mould (7), and a second layer of cross gates (2) below the first layer of cross gates (3). The gating system provided by the invention has the advantages that the mold filling steady and integral shaping of the large-scale integral thin-wall aluminium alloy cabin door casting are realized, a feeding difficult part of the upper end of the casting is subjected to effective feeding, and the interior quality is good; according to X-ray examination, the interior quality of the casting is high, and the metallurgical defects such as looseness, a shrinkage cavity and bubbles are not generated; according to fluorescence examination, the surface of the casting does not have the defects such as cold shut, looseness and cracks, and the casting can reach the level of HB963 I pieces.
Description
technical field [0001] The invention relates to an integral pouring system for a certain type of aircraft cabin door casting, which belongs to the technical field of casting technology. Background technique [0002] With the development of lightweight, integrated and precise forming technology for aluminum alloy castings, large-scale integral thin-walled aluminum alloy components have become typical castings that are in great demand in aviation, aerospace and other industries. The characteristics of this type of aluminum alloy castings are: casting wall thickness is thin, Generally, it is 4-6mm, the lateral profile size is 2-3m, and the height is 200-300mm. The wall thickness and cross-sectional area of the casting are thick at both ends and thin in the middle. It is difficult to satisfy the feeding of the top of the casting, especially the thick and large parts, only through the bottom injection method; the internal quality of the casting is high, and the filling process ...
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IPC IPC(8): B22C9/08B22C9/22
Inventor 周永江厉沙沙罗传彪洪润洲
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS