A device and method for slotting cracks in an intake casing support plate

Abstract

The invention provides an air inlet casing support plate crack slotting device and method, and belongs to the technical field of air inlet casing crack repairing. The device comprises an X-direction sliding table, a Y-direction sliding table, a Z-direction sliding table, a rotary file, an air drill, a magnetometer rack and a dial indicator, wherein the Y-direction sliding table is connected to an X platform of the X-direction sliding table; the Z-direction sliding table is mounted on a Y platform of the Y-direction sliding table through a Z seat of the Z-direction sliding table; a Z platform of the Z-direction sliding table is connected with the air drill through the rotary file; the dial indicator is hung on one side of the Z seat through the magnetometer rack; and a contact end of the dial indicator is in contact with the Z platform. By a lead screw and sliding table working principle, the three-direction moving sliding tables are formed, and then are matched with a dial indicator measuring mechanism, the air drill and a hard alloy cutting tool to form the slotting device. The slotting device is simple in structure, operating procedures of workers are simple, efficiency is high, a machining process is controllable, a slotting structure required before support plate crack repair welding is controllable in precision, and requirements on preparation before air inlet casing support plate crack repair welding are met.

Description

technical field [0001] The invention belongs to the repairing of cracks in air intake casings, in particular to a device and method for slotting cracks in support plates of air intake casings. Background technique [0002] Intake case welding machining components are one of the important parts of aviation turbofan engines. At present, the titanium alloy intake case support plate is a multi-layer titanium plate superplastic forming / diffusion connection structure, and cracks in the outer plate often occur during use ( figure 1 , 2 ), such faulty parts cannot be installed and used again. The intake casing is welded by the casing outer shell, inner ring, 15 support plates, mounting base, cover, etc. The maximum diameter of the parts is Φ950mm, and the total height is 247mm. Among them, the width of the support plate is 92mm, the length is 276mm, the minimum distance between the two support plates is 60mm, and the maximum distance is 170mm. Generally, crack faults occur on the...

AI Technical Summary

Problems solved by technology

Generally, crack faults occur on the surface of the support plate above the triangular area. Along the length direction of the support plate, the crack length is 45-50mm. The welding repair plan for this fault needs to construct a weldable groove structure for the crack fault area. Since the support plate is fixed It is a multi-layer titanium plate superplastic forming / diffusion connection structure. The location where the fault is located in the air intake casing is narrow, the slotting process is difficult, and the accuracy is difficult to guarantee. There is a slight deviation in the slotting. If the slotting is too deep and the reinforcing rib is damaged It will cause the whole part to be scrapped, or the deviation of the slotting position will affect the quality of welding repair

According to the material cost of 1 titanium alloy intake casing is 463,000 yuan, the manufacturing cost is more than 400,000 yuan, and the total value is more than 800,000 yuan. If the faulty intake casing components are scrapped, the loss will be huge

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