Synchronous centering clamping device for bar flaw detection and bar flaw detection method

Abstract

The invention provides a synchronous centering clamping device for bar flaw detection and a bar flaw detection method. The synchronous centering clamping device for bar flaw detection comprises a disc, a movable gear ring, a power device, an input gear, an output gear and a riding wheel rack. The number of the riding wheel racks is three, and each riding wheel rack is used in cooperation with one output gear and distributed on the disc at equal circumferential intervals to form a three-jaw wheel type clamping jaw. The power device provides power for the input gear, the input gear rotates and drives the movable gear ring to rotate, meanwhile, the output gear meshed with the movable gear ring also rotates, the riding wheel racks synchronously move in the radial direction along with rotation of the output gear, and the three sets of riding wheel racks synchronously move in the radial direction according to the same virtual circle center. Synchronous adaptation to dynamic changes of the outer diameter of the bar is achieved, self-adaptive clamping force is provided for the bar, and full-automatic synchronous centering of the bar is achieved.

Description

technical field [0001] The invention relates to a mechanism for synchronous clamping of workpieces, in particular to a clamping device for realizing three-wheel synchronous centering of a rotating flaw detector used for ultrasonic detection of bar materials. Background technique [0002] In the manufacturing process of special bars, due to problems such as slag inclusion in raw materials or smelting, defects such as cracks and trachoma may occur after the rolled round bars are formed. In order to ensure the quality of bar products and reduce safety hazards in use, domestic and foreign Rotary flaw detectors are used for flaw detection of special steel bars, and most of them use through-type detection coils to detect flaws on the surface or near the surface of the bars. In order to ensure the accuracy of flaw detection, it is necessary to set a three-claw mechanism at the front end of the rotary flaw detector for synchronous clamping of the bar. [0003] CN210451854U disclose...

AI Technical Summary

Problems solved by technology

[0005] One of the objectives of the present invention is to provide a three-wheel synchronous centering clamping device to solve the technical problem that the existing technology cannot realize the synchronous adaptation to the dynamic change of the outer diameter of the bar. Under the premise of the high coaxiality of the rotation center of the machine and the high accuracy of flaw detection, it can also realize the self-adaptation of the clamping force to the change of the outer diameter of the bar.

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