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Repairing method for deformation of inner hole in rear end of intermediate case

A repair method and intermediary technology, which is applied in the field of aero-engine intermediary casing repair, can solve problems such as unusable components and no repair experience, and achieve low cost, innovative ideas, and obvious application effects

Active Publication Date: 2018-03-02
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Description
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  • Application Information

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Problems solved by technology

[0002] In view of the large deformation of the inner hole of the rear end of a certain type of intermediate casing welding assembly recently contracted (circular runout 0.5mm, end surface runout 0.3mm), the intermediate casing welding assembly is an important component of a large turbofan engine, and the inner hole of the rear end The runout of the hole should not exceed 0.03mm. This part is the installation position of the bearing seat. If the inner hole of the rear end cannot be repaired, the component will be unusable; there is no deformation of the inner hole of the rear end in the prior art, and there is no repair experience. learn from

Method used

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  • Repairing method for deformation of inner hole in rear end of intermediate case
  • Repairing method for deformation of inner hole in rear end of intermediate case
  • Repairing method for deformation of inner hole in rear end of intermediate case

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Embodiment Construction

[0028] refer to Figure 1-6 The embodiments of the present invention are further described.

[0029] Step 1: Turn the intermediate casing positioning surface, and process the A and B surfaces of the parts to be repaired; the processing parameters are φ278.8, see figure 1 ;

[0030] Step 2: Remove the processing burr of the intermediate casing, the sharp edge is blunt by 0.2±0.1, and the surface of the part is not allowed to be damaged;

[0031] Step 3: Clean the surface and inner cavity of the part with alcohol to remove all dirt and excess;

[0032] Step 4: Carry out fluorescent inspection on the repaired area after the machining of the intermediate casing, that is, the A-side and B-side areas;

[0033] Step 5: Clean the surface and inner cavity of the part with alcohol again to remove all dirt and excess.

[0034] Step 6: Plasma spray nickel-aluminum coating on surface B; see figure 2 ;

[0035] Step 7: Machining the inner ring groove (the groove for the titanium ring...

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Abstract

The invention discloses a repairing method for deformation of an inner hole in the rear end of an intermediate case. The repairing method mainly comprises the following steps that 1, a positioning face of the intermediate case is turned, and the face A and the face B of a part needing to be repaired are turned; 2, turning burrs of the intermediate case are removed; 3, the surface and an inner cavity of a component are cleaned through alcohol; 4, fluorescent inspection is conducted on the turned repairing area of the intermediate case; 5, the surface and the inner cavity of the component are cleaned again; 6, a nickel-aluminum coating is plasma-sprayed on the face B; 7, an inner circular ring groove and a step are turned on the face A of the intermediate case; 8, a titanium ring is machined; 9, the titanium ring is assembled on the intermediate case; 10, the face A and the face B are machined; 11, the surface and the inner cavity of the component are cleaned through the alcohol; and 12,the component is checked, and thus repairing is completed. The repairing method has the advantages of being novel, easy to operate, convenient, effective, low in cost, obvious in application effect and the like.

Description

technical field [0001] The invention relates to the technical field of aero-engine intermediary casing repair, in particular to the deformation repair of the inner hole at the rear end of the intermediary casing of a large turbofan engine, and in particular to a method for repairing the deformation of the inner hole at the rear end of the intermediary casing. Background technique [0002] In view of the large deformation of the inner hole of the rear end of a certain type of intermediate casing welding assembly recently contracted (circular runout 0.5mm, end surface runout 0.3mm), the intermediate casing welding assembly is an important component of a large turbofan engine, and the inner hole of the rear end The runout of the hole should not exceed 0.03mm. This part is the installation position of the bearing seat. If the inner hole of the rear end cannot be repaired, the component will be unusable; there is no deformation of the inner hole of the rear end in the prior art, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00
CPCB23P6/00
Inventor 王树锋包大陆杨海涛康建铭马英
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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