Tool capable of automatically polishing wind power blade root nut hole inner wall and polishing method

Abstract

The invention provides a tool capable of automatically polishing the wind power blade root nut hole inner wall and a polishing method. The tool is installed on a nut hole drilling unit base of blade drilling equipment; the tool comprises a polishing rod, a polishing rod support rod, a polishing rod locking suite, a base bracket and an angle adjustment suite; the polishing rod is a cylinder provided with a through hole in the axial direction, wherein the diameter of the through hole is larger than that of the polishing rod support rod; the diameter of the polishing rod is the same as the lower limit of a wind power blade root nut hole, the length of the polishing rod is larger than the depth of the wind power blade root nut hole, and the surface of the polishing rod is a rough surface; the polishing rod support rod is a metal rod of which the surface is provided with a thread; the polishing rod is fixed on the polishing rod support rod through the polishing rod locking suite, and the polishing rod support rod is connected with the base bracket through the angle adjustment suite. The tool can do circumferential rotation along with a nut hole drilling system, it is guaranteed that inner wall burrs and steps are removed on the basis that the inner diameter of the nut hole is not enlarged, and the wind power blade root nut hole inner wall can be automatically polished.

Description

technical field [0001] The invention relates to a tool, in particular to a tool for automatically grinding the inner wall of a nut hole at the root of a wind power blade and a grinding method. Background technique [0002] With the development of large-scale wind energy resources, the installed capacity of wind turbines has increased year by year. As one of the key components of wind turbines, glass fiber composite wind turbine blades are connected to the hub through a certain root connection. The most common blade root connection method is "T-bolt connection". This design requires special drilling equipment to cut the blade root at the blade root after the blade is demoulded, and drill nut holes and bolt holes. In order to ensure the safety margin at the root of the blade, the round nut and the nut hole are tightly fitted, and the assembly clearance is usually 0.2-0.4mm. At present, the commonly used drilling equipment has a cutting unit, a milling unit, a bolt hole drill...

AI Technical Summary

Problems solved by technology

[0003] The nut hole drilling unit of this type of drilling equipment includes a nut hole drilling tool holder, but lacks a grinding mechanism for the inner wall of the nut hole, so the main problem of the drilled nut hole is: the inner wall of the nut hole is not smooth, with glass fiber burrs or Steps, when assembling the nuts, it will hinder the round nuts from entering the nut holes, and it is easy to damage the surface of the round nuts Dacromet

Therefore, before assembling round nuts, the following two methods are generally used for grinding: 1. Use reaming equipment. This method is often used when the diameter of the nut hole does not reach the lower limit of the standard, and this method is likely to cause the nut hole to become larger than The upper limit of the standard reduces the safety margin of the blade root fastener connection and poses a safety hazard to the subsequent operation of the fan

2. On-site workers use sandpaper to manually polish the inner wall of the nut hole. This method of removing burrs and steps on the inner wall of the nut hole is extremely inefficient. It takes 10 minutes for a worker to polish the inner wall of a nut hole, and the number of nut holes at the root of the wind turbine blade is as few as 60. , as many as 80, this grinding method has a serious impact on the production progress of the blade

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