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Laser ranging device and measuring and controlling method for plasma arc additive manufacturing of wires

A plasma arc and additive manufacturing technology, which is applied in plasma welding equipment, manufacturing tools, metal processing equipment, etc., can solve the problem of self-adjustment of welding torch, uncontrollable deposition process and deformation, accuracy and intuitiveness that cannot be compared with Compared with the precise laser displacement sensor, it achieves the effect of improving dimensional accuracy and molding quality, avoiding wire pressing, and precise molding process

Active Publication Date: 2018-07-20
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] At present, there are very few technologies related to the detection and control of the arc additive manufacturing process. The patent "A Real-time Measurement of the Deformation of Formed Parts in the Process of Additive Manufacturing" (application number 201510954796.9) discloses a method for detecting the deformation of formed parts in the process of additive manufacturing. The real-time measurement method and device detect the deformation of the measurement point through the displacement sensor, but the deposition process and deformation cannot be controlled, and the self-adjustment problem of the welding torch is not solved.
The patent "GMA additive manufacturing dual passive visual sensing detection device and its detection method" (application number: 201510282713.6) discloses a visual sensing detection device and detection method for the GMA additive manufacturing process, through visual image sensing Detecting the molding size requires complex processing of the collected images, and the accuracy and intuitiveness cannot be compared with the precision laser displacement sensor

Method used

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  • Laser ranging device and measuring and controlling method for plasma arc additive manufacturing of wires
  • Laser ranging device and measuring and controlling method for plasma arc additive manufacturing of wires

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Experimental program
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Effect test

Embodiment 1

[0028] The present invention provides such figure 2 A measurement and control method for manufacturing a laser displacement sensing device using the above-mentioned wire plasma arc additive material is shown, and the specific implementation steps are as follows:

[0029] Step 1, before depositing, set the measuring position of the laser sensor 7, the welding torch 5, the laser displacement sensor 7 and the deposition body 3 are located on the same vertical plane, the measurement position of the laser displacement sensor 7 is located directly above the deposition body 3, and the laser displacement sensor The angle θ between 7 and the horizontal direction is 90°, and the initial distance L between the laser displacement sensor 7 and the location of the layup layer 1 60mm;

[0030] Step 2, the machine feeding mechanism and the wire reel 11 start to feed the wire, and after completing a deposition layer, move the laser displacement sensor 7 to the measurement position, the robot...

Embodiment 2

[0037] The present invention provides such figure 2 A measurement and control method for manufacturing a laser displacement sensing device using the above-mentioned wire plasma arc additive material is shown, and the specific implementation steps are as follows:

[0038]Step 1, before depositing, set the measuring position of the laser sensor 7, the welding torch 5, the laser displacement sensor 7 and the deposition body 3 are located on the same vertical plane, the measurement position of the laser displacement sensor 7 is located directly above the deposition body 3, and the laser displacement sensor The angle θ between 7 and the horizontal direction is 90°, and the initial distance L between the laser displacement measurement sensor 7 and the location of the layup layer 1 200mm;

[0039] Step 2, the machine feeding mechanism and the wire reel 11 start to feed the wire, and after completing a deposition layer, move the laser displacement sensor 7 to the measurement positio...

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Abstract

The invention discloses a laser ranging device and a measuring and controlling method for plasma arc additive manufacturing of wires. The device comprises a working platform, a substrate, a plasma welding gun, a laser displacement sensor and a clamp thereof, a computer and a robot control cabinet. The measuring and controlling method of the laser ranging device comprises the following steps: measuring the distance from the device to an overlaying layer by means of a non-contact laser displacement sensor; calculating the height of the overlaying layer by means of the computer; and communicatingto the robot control cabinet to adjust the height of the welding gun at the moment of arcing of a next overlaying layer. According to the laser ranging device and the measuring and controlling methodfor plasma arc additive manufacturing of wires disclosed by the invention, the heights of the overlay layers for plasma arc additive manufacturing of carbon steel, stainless steel and titanium alloywires can be detected, the height of from a nozzle to a member is controlled in the overlaying process, the height of the nozzle is automatically adjusted in the plasma arc additive manufacturing process, and problems that pressed wires and burned nozzle as the nozzle is too low and splattering and overlaying defects as the nozzle is too high in the overlaying process and the like are solved, so that the molding process is more precise and automatic, and the dimensional precision and the molding quality of molded parts are improved effectively.

Description

technical field [0001] The invention belongs to the technical field of arc additive manufacturing, and mainly relates to a laser distance measuring device and a measurement and control method for wire plasma arc additive manufacturing. Background technique [0002] Arc Additive Manufacturing (Wire Arc Additive Manufacture, WAAM) is a layer-by-layer cladding principle, using melting inert gas welding (MIG) arc, tungsten inert gas welding (TIG) arc and plasma welding (PAW) The arc is the heat source, through the melting of wire or powder under the control of the pre-programmed program, according to the planned path, it is gradually deposited into the advanced digital additive manufacturing technology of the required metal structural parts. Its essence is metal rapid deposition forming. Arc additive manufacturing has the characteristics of high forming efficiency, high wire utilization rate, compact stacking structure, and excellent performance of formed parts, and can realize ...

Claims

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Application Information

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IPC IPC(8): B23K10/02B23K10/00
CPCB23K10/00B23K10/006B23K10/027
Inventor 冯曰海何磊张天齐王克鸿张德库黄俊周琦余进
Owner NANJING UNIV OF SCI & TECH
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