Infrared temperature detecting device and method for wire material plasma arc additive manufacturing

Abstract

The invention discloses an infrared temperature detecting device for wire material plasma arc additive manufacturing and a detecting method of the infrared temperature detecting device. The infrared temperature detecting device comprises a working platform, a base plate, a plasma welding gun, an infrared temperature sensor, a clamp of the infrared temperature sensor, a temperature collecting controller, a computer, a robot control cabinet and the like. According to the detecting method of the infrared temperature detecting device, a non-contact infrared temperature sensing mode is mainly adopted, the temperature of a starting point of a surfacing layer is collected, when the temperature is detected to be lower than a preset temperature value, the computer communicates with the robot control cabinet through the temperature collecting controller, and a next pass of surfacing is conducted. In this way, according to the infrared temperature detecting device for wire material plasma arc additive manufacturing and the detecting method of the infrared temperature detecting device, detecting for the temperatures between surfacing layers of carbon steel, stainless steel and titanium alloy wire material plasma arc additive manufacturing can be achieved; the arcing time of the surfacing layers is controlled; homogeneous temperature control over metal of the surfacing layers is achieved; and the problems that smelting and coating layers are over heated, and the metal grain size is not even are effectively avoided, so that a formed piece is even in structure property, and the forming size precision and quality of electric arc additive manufacturing are improved.

Description

technical field [0001] The invention belongs to the technical field of arc additive manufacturing, and mainly relates to an infrared temperature detection device and a detection method for wire material plasma arc (Plasma Arc Welding, PAW) additive manufacturing. Background technique [0002] Arc additive manufacturing technology is a layer-by-layer cladding principle that uses arcs provided by welding methods such as melting inert gas welding (MIG), tungsten inert gas welding (TIG) and plasma welding (PAW) as heat sources. , under the control of the program, through the addition of wire, the advanced digital manufacturing technology of gradually forming metal parts from line-surface-body according to the three-dimensional digital model, its essence is surfacing rapid prototyping. It has the characteristics of fast forming, high wire utilization rate, excellent workpiece performance, and can complete the one-time molding of complex workpieces and large-sized workpieces. It h...

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Problems solved by technology

[0004] At present, there are few related technologies related to the detection and control of the arc additive manufacturing process. The patent "GMA additive manufacturing dual passive visual sensor detection device and its detection method" (application number: 201510282713.6) discloses a method for GMA additive manufacturing. The visual sensing detection device and its detection method in the process control the forming size through visual sensing detection, but it cannot control the grain size of each deposited layer to be similar, nor can it guarantee the uniformity and stability of the structure and performance of the formed part. The patent "welding temperature Detection device, welding machine and calibration method of welding temperature" (application number: 201310275348.7) discloses a detection device and detection method for the temperature of the workpiece to be welded. This device cannot be applied to arc additive manufacturing and cannot realize the welding process Closed-loop control, while temperature measurement adopts contact temperature sensing method, which will damage the parts to be welded during installation

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