Laser-cladding molten pool defocusing quantity measuring device and measuring method

Abstract

The invention provides a laser-cladding molten pool defocusing quantity measuring device. The laser-cladding molten pool defocusing quantity measuring device comprises a shell, a camera lens, a CMOS image sensor, a controller and a communication module, wherein the CMOS image sensor, the controller and the communication module are connected in sequence. The CMOS image sensor, the controller and the communication module are arranged in the shell. The camera lens is fixed to the outer portion of the shell and is connected with the CMOS image sensor. The camera lens is used for collecting a molten pool real image and projecting the molten pool real image onto the surface of the CMOS image sensor. The CMOS image sensor is used for converting the received optical real image into a digital image. The controller is used for analyzing the position of a molten pool according to the digital image converted by the CMOS image sensor and converting the position of the molten pool into defocusing quantity information. The communication module is used for transmitting the defocusing quantity information of the molten pool outwards. The laser-cladding molten pool defocusing quantity measuring device can measure the defocusing quantity of the molten pool on line in real time and directly output defocusing quantity data measured finally through the communication module.

Description

technical field [0001] The invention relates to the fields of laser cladding and laser additive manufacturing, in particular to a laser cladding melt pool defocus measurement device and a measurement method thereof. Background technique [0002] In the laser additive manufacturing (3D printing) technology, there is a synchronous feeding solid cladding forming technology. Its working principle is that the laser forming nozzle focuses the laser beam on the surface of the metal substrate and scans it according to the predetermined trajectory, and continuously ejects it from the synchronous feeding powder tube. The metal powder falls into the focus of the laser, and the focused laser will put the metal powder into a liquid metal pool on the surface of the underlying metal. After the molten pool is continuously melted and solidified, the molten metal grows layer by layer. Controlling the laser scanning irradiation and powder injection area can achieve specified The layered accumu...

AI Technical Summary

Problems solved by technology

Although this measurement system has high measurement accuracy, it cannot measure the defocus amount in real time. In addition, the price of the 3D shape sensor is also high, which is not conducive to the cost control of the equipment.

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