Large-scale forging laser radar on-line tri-dimensional measuring device and method

Abstract

The invention relates to a device and a method for on-line three-dimensional measuring of a laser radar of heavy forging in the measuring technical field, which comprises a two- dimensional laser radar, a servo-motor, a junction box, a rotary main shaft, a spacing and null point sensor, a bearing block which is provided with a bearing, a band brake apparatus, a back supporting stand of the laser radar, an L-shaped mounting bottom plate, a vertical mounting chassis, a movement-control card, a data collecting card, and a computer which is used for processing data. Firstly, the laser radar is positioned on the horizontal surface of a forging axial cord, then four surfaces of the forging are respectively scanned by the laser radar, the two-dimensional laser scanning radar is scanned in the surface which is vertical to an axial cord of the forging, the servo-motor drives the laser radar to rotate in the horizontal surface, thereby the three-dimensional scan of the forging is realized, finally, shape and parameter of the forging are gained through data process, and deviation of the shape of the forging is gained. The invention greatly increases accuracy and speed of identification, enlarges range of application, satisfies measuring requirement of a forging, and effectively increases measuring accuracy and efficiency of the forging.

Description

technical field [0001] The invention relates to a device and method in the field of measurement technology, in particular to a laser radar online three-dimensional measurement device and method for large forgings. Background technique [0002] Large-scale forgings are indispensable blanks for manufacturing key components of major technical equipment. The production cycle is long, the technology is difficult, and the price is expensive. The diameter of large forgings produced in my country has exceeded 5m, and the length has reached 17m. Accurately measuring the size of forgings at a high temperature of more than 1,000 degrees has become a problem that has not been solved for a long time. So far, my country's large forging production plants have used simple tools to measure directly by manual contact in a hot state. Medium and small shaft forgings are usually directly measured by the operator with a large caliper at a distance less than 1m from the forging. Not only are the...

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Problems solved by technology

Medium and small shaft forgings are usually directly measured by the operator with a large caliper at a distance less than 1m from the forging. Not only are the working conditions harsh, but the measurement error is also large

Although this method is simple, it cannot reflect the shape deviation, and a large device needs to be installed outside the hydraulic press

The second is to use a movable camera to detect the edge of the end face of the forging, so as to calculate the diameter; however, the forging needs to be completely offline, and the measurement time is long

The third is to use photogrammetry technology to obtain the size and shape information of the end face at the same time, but the workpiece needs to be completely separated from various accessories, and the measurement time is longer

However, this article only studies the direction of topography and landform measurement, and does not involve the field of high-temperature forging measurement

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