Measurement and correction method of flatness of large-diameter flange plane

Abstract

The invention relates to a measurement and correction method of flatness of a large-diameter flange plane. The diameter of the flange plane is greater than 3 meters. And the method comprises the following steps that: the to-be-measured flange plane is cleaned to remove corrosion and paint; a laser planometer is utilized to measure flatness of the flange plane; data of the measured flange plane are obtained and are analyzed as well as a specific area that needs to be ground is indicated; a bowl plane grinder is utilized to carry out plane grinding; the laser planometer is utilized to carry out measurement and the measurement result is analyzed again so as to determine whether a precision requirement of the large-diameter flange plane is met; and grinding and measurement are carried out repeatedly until the ground large-diameter flange plane meets the designed precision requirement. According to the invention, the method can be used for measurement and correction on flatness of a large-diameter flange plane in fields like ocean engineering, ship construction, wind power generation and mechanical manufacturing and the like; it is beneficial to improve service life of the large-diameter flange plane, improve measurement precision of the flatness of the flange plane, shorten a construction period and reduce construction cost.

Description

technical field [0001] The invention relates to mechanical manufacturing, in particular to a method for measuring and correcting the flatness of large-diameter flanges during mechanical manufacturing, which can be used for marine cranes, loaders, offshore platforms, wind power generation, shore cranes, and various automobile cranes , naval guns, land guns and tanks and other equipment flange processing operations. Background technique [0002] For equipment with slewing bearings such as cranes and windmills, due to the limitation of machining conditions, the base is usually divided into upper and lower parts. After the flange of the upper base is processed, it is welded or bolted to the lower base, and then the equipment is installed. These flanges have a diameter of more than 3 meters and belong to large diameter flanges. Due to the deformation of the flange plane during construction or transportation, the most important point for the function and service life of the s...

AI Technical Summary

Problems solved by technology

However, this measurement method has the following problems: there are also errors in the contact surface between the mating flange and the body flange; the gap between the flange surfaces will have different gaps with different installation positions; the strength requirements of the mating flange are compared High, deformation will occur during hoisting, affecting the accuracy of measurement; for large-diameter flanges (diameter greater than 3m), the cost of making matching flanges is relatively high

The problem with this method is that there is also an error between the matching flange and the main body flange, and there is an error in the control of the precision of the grinding itself with the matching flange. When this error is installed on the main body, if the alignment is not accurate, the gap will Larger; the selection of grinding tools also has a great influence on the accuracy of the flatness. At present, most of the grinding machines used can only be point grinding or line grinding. Even skilled grinders are difficult to maintain the entire plane grinding. Consistent amount of sanding, and low spots for sanding that are also difficult to remove after buffing

[0005] The second method to deal with the flange plane is machining, and its main tools are boring machines and milling machines. The problem with this method is that the diameter of the flange limits the machining. For small flanges and large flanges, this method is both Not applicable; the position of the base also limits the machining method, such as the position of the base is too high, or there is no crane cooperation, etc.; the fixing of the machine tool is difficult, one is the impact of space, and the other is the limitation of the base on welding, etc.; the flange The thickness requirement also limits the machining method; the flange connection bolt holes also limit the machining method, and the use of the boring machine is limited; the machining accuracy of the machine tool is high, and the strength of the machine tool's fixing parts is also high.

Images