A kind of riveting method of balance counterweight and riveting tooling

Abstract

The invention discloses a balancing weight block riveting method and riveting tool. A fan disc is clamped through positioning screws arranged on an arched clamping block, adjusting bolts are used for adjusting the height of a pressure installing base relative to a positioning block, and then the upper end face of an ejection head makes contact with the end face of a rivet arranged on the fan disc; an ejection rod can axially move along with an ejection rod of a pressure device, then the force effect is exerted to the rivet head, plug pin positioning holes of the riveting tool are aligned with installing edge holes of the fan disc, force exerting and force bearing of the pressure device only exist in an arched clamp structure, and the fan disc can not be crushed due to external force impact. Positioning screws of an arched supporting block structure are aligned with and attached to the surface of a part installing edge, it is guaranteed that the positioning screws can jack the part installing edge after being screwed, and operation is convenient; positioning and clamping are conducted through the arched clamping block, and the positioning performance is greatly improved; and the ejection rod and the ejection head are coaxially arranged, the pressure device can coaxially exert pressure, the riveting success rate is increased, the riveting cost is reduced, and the assembling period is shortened.

Description

technical field [0001] The invention relates to the field of mechanical assembly, in particular to a method for riveting a balance weight block and riveting tooling. Background technique [0002] During the dynamic balance of the supercharged stage rotor assembly of an aero-engine, it is necessary to correct the remaining unbalance of the rotor assembly by installing side riveted counterweights in front of the fan disk. However, the thickness of the front mounting edge of the fan tray is generally small. When the external impact force is too large, it is easy to slightly deform the front mounting edge of the fan tray or cause the risk of fatigue stress on the front mounting edge of the fan tray. In addition, there is relatively little space for the inner cone surface on the front mounting side of the fan tray, and tooling can easily damage the inner cone surface of the fan tray during the riveting process. On the other hand, the riveting of the counterweight is achieved by ...

AI Technical Summary

Problems solved by technology

[0005] (1) The impact force of the pneumatic riveting gun is relatively large, and the adapter rod is easily broken, which makes the riveting work impossible

It is easy to hurt people if the pieces fly out. If the pieces fall into the inner cavity of the rotor assembly of the supercharger stage, it will cause the supercharger stage to be disassembled and troubleshoot, and there is a big risk hidden danger

[0006] (2) Pneumatic riveting gun cannot be positioned, it is difficult for personnel to operate, and the riveting gun head is easy to come off the adapter rod

[0007] (3) The riveting process is unstable and cannot achieve standardized operations

[0008] (4) During the riveting process, the rivet is easily bent or the size of the rivet head after riveting does not meet the requirements, and it needs to be removed and replaced

[0009] (5) When riveting, the impact force of the pneumatic riveting gun will be directly transmitted to the fan tray through the tooling, which may cause slight deformation of the fan tray or cause fatigue stress on the front mounting edge of the fan tray

[0010] Based on the above reasons, the method of riveting the rivet with the pneumatic riveting gun through the transfer rod takes a long time, the difference in personnel operation is large, the riveting result is unstable, the riveting failure is easy, and the removal of the riveting failed rivet is easy to scratch the installation edge of the fan tray, etc. , there are great risks and hidden dangers, which will affect the completion of engine production tasks and assembly cycle

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