Weld bead dimension zero-lag real-time detection device for arc additive manufacturing and real-time detection method

A technology of additive manufacturing and real-time detection, applied in measurement devices, optical devices, instruments, etc., can solve the problems of non-lag detection, inability to realize the width and height of the cladding channel, and achieve the effect of non-lag visual sensing

Inactive Publication Date: 2017-05-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the prior art cannot realize the hysteresis-free detection of the width and height of the welding path, and provide a real-time detection device and real-time detection method for arc additive manufacturing of the welding path size without hysteresis

Method used

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  • Weld bead dimension zero-lag real-time detection device for arc additive manufacturing and real-time detection method
  • Weld bead dimension zero-lag real-time detection device for arc additive manufacturing and real-time detection method
  • Weld bead dimension zero-lag real-time detection device for arc additive manufacturing and real-time detection method

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specific Embodiment approach 1

[0016] Specific implementation mode one: the following combination figure 2 This embodiment is described. The device for detecting the size of the welding path in arc additive manufacturing without hysteresis in real time according to this embodiment includes a partition light reduction element 100, a line structured light generator 101, an optical filter 102, and a CCD camera 108. and lens 109;

[0017] Lens 109 is installed on the front end of the imaging target surface 107 of CCD camera 108, and optical filter 102 is installed on the front end of lens 109 interior, and the laser stripe 103 that line structured light generator 101 emits is projected to molten pool 104 rear, and laser stripe 103 and There is a distance between the molten pool 104, the welding torch 106 is vertically arranged directly above the molten pool 104, and the arc 105 produced by the welding torch 106 is located at the upper end of the molten pool 104;

[0018] Between the imaging target surface 107...

specific Embodiment approach 2

[0020] Specific implementation mode two: the following combination figure 2 This embodiment will be described. This embodiment will further describe the first embodiment. The zoned light reduction element 100 is composed of light reduction sheets of different sizes and different light transmittances.

[0021] In this embodiment, different areas of the partition light reduction element 100 have different light transmittances, therefore, the arc 105 generated by the welding torch 106, the molten pool 104, and the laser stripes 103 projected by the line structured light generator 101 on the welding path are all It can be clearly imaged on the imaging target surface 107 of the CCD camera 108 .

specific Embodiment approach 3

[0022] Specific implementation mode three: the following combination figure 2 This embodiment is described. The real-time detection method used in this embodiment is used for the real-time detection device of arc additive manufacturing welding path size without lag. The real-time detection method can realize a CCD visual image and see the high-temperature deposited metal and laser The stripes 103 realize the lag-free real-time detection of the size of the welding path in arc additive manufacturing. The specific method is: the partition dimming element 100 controls the amount of light entering the molten pool 104 to be lower than that of the laser stripe 103, so that the partition is dimmed and then welded The radiation intensity of the metal spectrum is at the same level as the light intensity of the laser stripes 103 .

[0023] In the present invention, in arc additive manufacturing, the four light sources are sorted in descending order of average brightness, which are: arc ...

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Abstract

A weld bead dimension zero-lag real-time detection device for arc additive manufacturing and a real-time detection method belong to the field of intelligent additive manufacture and are intended to solve the problem that the prior art is unable to provide zero-lag detection for weld bead width and height. The weld bead dimension zero-lag real-time detection device comprises a zonal dimming element, a linear-structure optical generator, an optical filter plate, a CCD (charge coupled device) camera and a head; the head is mounted at the front end of an imaging target face of the CCD camera, the optical filter plate is mounted at the inner front end of the head, a laser stripe emitted by the linear-structure optical generator is cast to the rear of a molten bath, the laser stripe and the molten bath are spaced, a welding torch is vertically disposed right above the molten bath, electric arc generated by the welding torch is positioned at the upper end of the molten bath, and the zonal dimming element is mounted between the imaging target face of the CCD camera and the head. The weld bead dimension zero-lag real-time detection device and the real-time detection method are used for arc additive manufacture and are also suitable for arc welding.

Description

technical field [0001] The invention belongs to the field of intelligent additive manufacturing. Background technique [0002] In arc additive manufacturing, how to detect the width and height information of the welding path in real time without lag is a key issue. [0003] Welding bead size belongs to geometric information, which is suitable for non-contact inspection with vision sensor. Existing visual detection methods include line structured light active visual detection and CCD passive visual detection, both of which have certain limitations. [0004] The line structured light sensor is a commonly used active vision sensor, which can detect the width and height information of the welding path at the same time. However, in order to prevent the arc light from interfering with the visual sensing of line structured light, a baffle needs to be added between the sensor and the welding torch to block the arc light, and the sensing position has a certain distance (about 35mm)...

Claims

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Application Information

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IPC IPC(8): G01B11/02G01B11/06
CPCG01B11/02G01B11/0608
Inventor 张广军韩庆璘金宇鹏赵慧慧
Owner HARBIN INST OF TECH
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