Rapid machine adjusting method and system for pipe bending machine

Abstract

The invention discloses a rapid adjusting method and system for a pipe bender, and the method comprises the steps: firstly, selecting a multi-camera system; establishing a model of internal and external parameters of the multi-camera system; calibrating the multi-camera system by utilizing the internal and external parameter models of the multi-camera system and using a calibration plate; capturing a pipe fitting image by using the calibrated multi-camera system, and fitting a seed cylinder; retrieving and reconstructing a three-dimensional model of the pipe fitting by taking the seed cylinderas a reference and combining the pipe fitting image captured by the multi-camera system; and correcting the size of the pipe bender by utilizing the three-dimensional model of the pipe fitting. The invention provides a high-precision and high-robustness multi-camera calibration method for solving internal and external parameters of cameras by using a specific calibration plate. In the image matching process based on the seed cylinder, the edge of the seed cylinder is positioned in combination with a gray threshold. In addition, in order to minimize the deviation of the reconstruction process,a linear interpolation method is used in combination with a seed cylinder-based method.

Description

technical field [0001] The invention relates to the technical field of pipe fittings, in particular to a quick adjustment method and system for a pipe bending machine. Background technique [0002] Pipe fittings are important components in the aviation and automotive fields, responsible for the transportation of liquids and gases and the connection of components. Considering the safety of aircraft and automobiles, the shape of the pipe must be checked before installation to prevent potential dangers caused by excessive assembly stress (especially in the engine). On the other hand, with the development of CNC machine tools (Computernumerical control machine tools) for pipe bending machines, most of the pipes used for the main body of automobiles or aircrafts are produced by CNC pipe bending machines. In order to reduce the waste of pipe material during the bending process, an auxiliary pipe shape measurement system that can correct the size of the pipe is needed. However, b...

AI Technical Summary

Problems solved by technology

However, there are some limitations that cannot be ignored: (1) One type of pipe fitting corresponds to one kind of fixing fixture. The more types of pipe fittings are detected, the more types of fixtures are required

(2) The fixture needs to be molded, and the cost is too high, and some pipe fittings are difficult to produce the corresponding fixture due to their special structure. This kind of situation is often encountered in the pipe fittings used in aircraft

Furthermore, it is not sustainable to manufacture too many clamps because once a certain type of fitting is not used, the corresponding clamp will not be used again

(3) The fixture can only check the shape of the bent pipe

When used in conjunction with a CNC bending machine, it can only be checked qualitatively to see if it meets the requirements, and cannot provide the correction amount required in production

Images