Device for measuring size of thermal-state free forge piece by utilizing optical image and display grid

Abstract

The invention discloses a device for measuring the size of a forge piece in the working state of forging equipment. The device is mainly used for rapidly measuring and estimating the sizes of free forge pieces such as a flange shaft, a step shaft and a block body in the forging process of the forge pieces. According to the principle, a filter is additionally arranged in front of a lens of an optical camera or a video camera, and the exposure is automatically adjusted according to the temperature of the forge piece, so that a clear forge piece image is obtained and transmitted to a display screen. A coordinate grid is arranged on the display screen and superposed with the forge piece image, and the size of the coordinate grid can represent the actual size of the forge piece; and the opticalcamera can measure the actual size of the forge piece through an algorithm. On the display screen, the size of the forge piece can be directly estimated according to the grid numerical value; and thesize between two points of the edge line or the entity of the forge piece can be directly measured. The method can be used for conveniently and quickly measuring and estimating the size of the free forge piece at 1300 DEG C or below, and has important significance for improving the production efficiency and safety production.

Description

technical field [0001] The invention relates to the measurement of the size of a hot forging piece in the forging process, and the automatic forging by controlling a press according to the measurement result, and the applicable technical field is the field of free forging. Background technique [0002] Free forging is a processing method that uses the impact force or pressure of the press to make the metal deform freely in all directions between the upper and lower anvil surfaces without any restrictions, and obtain forgings with the required shape and size and certain mechanical properties, referred to as free forging forging. Generally, a hydraulic press or a fast forging machine is used for casting steel ingots, and the steel ingots are forged into shafts, blocks, disc cylinders, etc. During the forging process, it is necessary to continuously measure and estimate the size of the forgings to ensure that the forging deformation process has a suitable forging ratio. It doe...

AI Technical Summary

Problems solved by technology

Since scanning and data processing take a lot of time, and moving the laser line requires a long guide rail, it cannot meet the requirements of simultaneous operation and measurement, and the laser is affected by factors such as the brightness of the hot forging, thermal radiation, etc., and the reliability is not high.

[0006] 3) Using binocular optical lens measurement and laser grid-assisted measurement method, the three-dimensional size of the forging can be obtained, but because the forging is deformed at any time during the forging process, the temperature and brightness are also constantly changing. The laser is affected by the temperature and heat radiation of the forging, so it is difficult to guarantee the measurement accuracy

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