Die-casting process for aviation blades

An aviation blade and die-casting technology, applied in the aviation field, can solve the problems of high processing cost and long processing cycle, and achieve the effects of high production efficiency, less machining allowance and good mechanical properties

Inactive Publication Date: 2019-08-16
ZUNYI SPACE XINLI DIE CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention intends to provide an aviation blade die-casting process to solve the problems of long processing period and high processing cost in the prior art

Method used

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  • Die-casting process for aviation blades

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Aviation blade die-casting process, the specific operation steps are:

[0020] (1) Preparation materials: aluminum ingots, refining agents, aluminum-iron master alloys and industrial silicon with a diameter of 20mm to 40mm;

[0021] (2) Make the die-casting mold: According to the requirements of the blade drawing, design the casting drawing that can meet the requirements of the blade, then design the die-casting mold according to the designed casting drawing, and finally make the mold according to the mold design drawing.

[0022] (3) Alloy smelting: Put the weighed aluminum ingot, industrial silicon (the diameter range that can be used for industrial silicon is 30mm), aluminum-iron intermediate alloy and the returned charge into the intermediate frequency furnace, melt, and the furnace charge is loaded immediately It can be heated up to a temperature of 770°C. For slag removal, the slag can be removed when the temperature of the alloy measured by a thermocouple drops ...

Embodiment 2

[0027] Aviation blade die-casting process, the specific operation steps are:

[0028] (1) Preparation materials: aluminum ingot: the material grade of aluminum ingot is Al99.70 b (Al≥99.70%), the surface is clean and silvery white, without serious shrinkage porosity and shrinkage cavity, slight slag inclusion, refining agent, aluminum-iron master alloy are allowed: the material grade is aluminum-iron master alloy (AlFe20), the raw material Re-inspect the chemical composition (Fe≥18~22%, Cu≤0.1%, Si≤0.2%, Ti≤0.3%, Zn≤0.1%, Al balance), the surface of the alloy ingot should be free of mold spots, oil stains, and inclusions , but oxide film, wrinkle and shrinkage cracks are allowed, the fracture structure should be dense, no obvious slag and segregation are allowed, and industrial silicon with a diameter of 20mm to 40mm: massive, clean surface, and the section should be clean, not allowed There are slag inclusions, soil, powdery silicon bonding and other foreign matter brought b...

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Abstract

The invention discloses a die-casting process for aviation blades, and belongs to the technical field of aviation. The die-casting process for aviation blades comprises the following steps that (1) materials are prepared, and specifically, an aluminum ingot, a refining agent, an aluminum-iron intermediate alloy and industrial silicon are prepared; (2) a die-casting mold is manufactured; (3) the aluminum ingot, industrial silicon and aluminum-iron intermediate alloy are molten at the temperature of 770-790 DEG C after being weighed slagging-off is conducted after the alloy temperature is decreased to 730-760 DEG C, the quantity of a fluxing medium during slagging-off is 0.1%-0.3% of the alloy weight, refining is conducted, and discharging is conducted; (4) die casting is conducted, specifically, the die-casting parameter, namely the injection pressure, is set to 8-10 MPa before melting and hydraulic casting, then the die-casting mold is preheated for 10min-30min, molten liquid is pouredafter the mold reaches the working temperature of 200-250 DEG C, and die casting is conducted till the surface of a casting is free of the defects of cold shut and insufficient pouring; (5) trimmingis conducted; and (6) finish machining is conducted. According to the scheme, the machining cycle is short, and the cost is low.

Description

technical field [0001] The invention relates to the field of aviation technology, in particular to an aviation blade die-casting process. Background technique [0002] Blades are important internal structural parts of aircraft. The blade has an arc structure, and the arc structure transitions from a wall thickness of 1mm to 1.5mm. The wall thickness of both sides transitions from 1mm to 0.2mm, and the minimum wall thickness is 0.2mm. There are two cylinders with a diameter of Φ4 on the side, and the thicknesses are 2.2mm and 1.6mm respectively. The holes of Φ1.6 and Φ2.6 are drilled in the middle. The tolerance of the two holes is required, and the coaxiality of the two holes is required to be 0.05. [0003] The blade requires a tensile strength of 200MPa or more. According to the requirements of the blade structure and various performance indicators, the minimum wall thickness is 0.2mm, and the minimum wall thickness of aluminum alloy die-casting parts recommended in the...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C22C21/00C22C1/03C22C1/06B22D17/00
CPCB22D17/00C22C1/026C22C1/03C22C1/06C22C21/00
Inventor肖贵玉范晓刚
OwnerZUNYI SPACE XINLI DIE CASTING