Measurement device for curve shape of frame

Abstract

The invention discloses a measurement device for a curve shape of a frame, and relates to the technical field of hull building. The measurement device comprises a target installed on a frame chuck of a digital frame cold bender; the digital frame cold bender is provided with a tracking measurement device with the target as an object; the target is provided with a laser and a cat eye reflector; the tracking measurement device comprises a laser ranging device, an angle encoder, a photodetector for aiming at a laser beam emission point and a rotation unit for driving the laser ranging device, the angle encoder and the photodetector to rotate; the cat eye reflector reflects the beam of the laser ranging device; and the laser ranging device receives the reflected beam. Compared with a conventional device, the measurement device provided by the invention overcomes the problems that a steel wire string measurement device used in a conventional digital frame cold bender can hardly ensure the forming quality and the forming precision of a frame line shape and the detection efficiency is relatively low.

Description

technical field [0001] The invention relates to the technical field of hull construction, in particular to a device used in the cold bending process of hull ribs to measure rib curve shape parameters. Background technique [0002] Since the rib curve shape is two-dimensional, see figure 1 , any point on the plane curve Can use to represent, among them is the origin of the curve to any point chord length, is any point Chord angle when bending , so use It can also represent the curved shape of the ribs. [0003] When the existing hull numerical control rib cold bending machine processes ribs, it usually adopts a step-by-step feeding processing method, that is, as the ribs are fed, the head end of the ribs (equivalent to the origin of the plane curve ) is constantly changing on the plane, while the cold bending point on the rib (equivalent to any point on the plane curve ) is limited by the processing pressure head, so the existing hull CNC rib cold bendin...

AI Technical Summary

Problems solved by technology

Since the steel wire is exposed in the air, the steel wire will become loose due to thermal expansion and contraction, and the steel wire will be worn and damaged during the continuous removal process. Generally, the steel wire will break after working for about half a year, which will affect the normal operation of the machine. , so the steel wire string measurement device of the existing CNC rib cold bending machine is difficult to ensure the forming quality and forming accuracy of the rib line, and its detection efficiency is low

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