Onsite large-sized flange grinding machine

Abstract

The invention discloses an onsite large-sized flange grinding machine which comprises a pedestal, wherein a base plane adjusting table is arranged above the pedestal; the side face of the pedestal is horizontally provided with at least two supporting legs for supporting and fixing; the base plane adjusting table is provided with a connecting column which is perpendicular to the upper surface of the base plane adjusting table; the lower end of the connecting column is rotatably connected with the base plane adjusting table, and the upper end of the connecting column is horizontally provided with a rotary arm frame; and one end of the rotary arm frame is connected with a grinding mechanism for processing a flange face. The onsite large-sized flange grinding machine is applied to detecting and grinding a large-sized flange plane at a construction site; the detection accuracy and the grinding accuracy are precise; the grinding effect of a large-sized milling machine is achieved; the working efficiency is effectively increased; the labor intensity of workers is reduced; and the grinding machine is low in production cost and convenient to disassemble and then transport and contributes to market promotion.

Description

technical field [0001] The invention relates to a processing device, in particular to a large-scale flange grinding machine used on site. Background technique [0002] Due to the large ships of the 10,000-ton class (including bulk carriers and container ships, etc.), almost all marine lifting equipment ----- CRANE (CRANE), which consists of tower body, lifting column and crane The installation process of the lifting column includes connecting the processed lifting column body on the main deck of the hull by welding, and then welding the lifting column flange body on the lifting column body. However, in the process of multiple hoisting and welding, it is inevitable to deform the originally processed flange plane. This deformation can easily exceed the flatness tolerance range specified in the technical documents (not greater than 0.2~0.4mm), and some even reach The flatness tolerance is 0.8mm, and the flatness tolerance is an item that must be inspected and controlled during...

AI Technical Summary

Problems solved by technology

However, in the process of multiple hoisting and welding, it is inevitable to deform the originally processed flange plane. This deformation can easily exceed the flatness tolerance range specified in the technical documents (not greater than 0.2~0.4mm), and some even reach 0.8mm, and this flatness tolerance is an item that must be inspected and controlled during the installation of the tower body by Klein Crane, so the on-site inspection and measurement of the flange flatness must be carried out before the tower body is installed, and corrections must be made for those out of tolerance

[0003] It is usually difficult to use instruments to accurately detect a flange surface with a diameter of more than 2 meters. Most shipyards use ordinary laser dots to detect on the square, but the readings of the laser dots on the square are purely estimated. , there are human factors, and it varies with different measurers, resulting in low reliability of the measured results; in addition, when the flatness is unqualified with laser detection, it must be polished by hand, and each grinding must be done with Laser inspection once, then grinding, and then laser inspection, and so on. Practice has proved that the flatness exceeds 0.3mm. It takes 2 laser masters and 2 experienced fitters to measure and grind for several days. Not only is the efficiency low , the labor intensity is high, and it seriously affects the installation cycle; some manufacturers rent a large milling machine worth hundreds of thousands to measure and mill the flange plane on site, but the large milling machine is bulky, heavy, inconvenient to carry, and the rent is expensive. The cost of each lease can range from a few thousand to over ten thousand. Long-term lease will greatly increase the manufacturing cost of the ship, which is not conducive to market competition

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