Non-consumable electrode arc hot wire additive manufacturing wire temperature detection control device and method

Abstract

The invention discloses a non-consumable electrode arc hot wire additive manufacturing wire temperature detection control method and device; the device comprises a temperature acquisition control device, a hot wire power supply and a welding power supply, and the temperature acquisition control device comprises an infrared temperature sensor, a hot wire temperature acquisition instrument, a hot wire temperature control instrument and a display. The infrared temperature sensor is fixed to a non-consumable electrode welding gun and connected with the display through the hot wire temperature acquisition instrument , and the hot wire temperature control instrument and the display are both connected with the hot wire power supply. The method has the following steps: comparing a difference deltaT' between a preset temperature T0 and the acquired temperature T1 with a preset difference delta T in the display via the hot wire temperature control instrument, and adjusting the heating current of the hot wire power supply in time to stabilize the heating temperature of the wire at the preset temperature; according to the method and device, the stable detection and control of the wire temperature in the plasma arc hot wire additive manufacturing process can be realized, and the stability of a stacking process and the forming size precision and quality of an additive member are effectivelyimproved.

Description

technical field [0001] The invention belongs to the field of wire arc additive manufacturing, and in particular relates to a non-melting electrode arc hot wire additive manufacturing wire temperature detection and control device and method. Background technique [0002] The prototype of wire arc additive manufacturing technology can be traced back to the beginning of the 20th century. For the first time, Americans used electric arc as a heat source to produce "3D printed" metal deposits by depositing metal droplets layer by layer. Much attention. Until the end of the 20th century, under the background of resource saving and high-efficiency manufacturing, more and more scholars have focused on its basic research and application development because of the advantages of good shape, high efficiency, and low cost. [0003] Compared with the traditional wire arc additive manufacturing technology, the non-melting electrode arc hot wire additive manufacturing technology has higher ...

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Problems solved by technology

Chinese patent (application number 200910071997.9) discloses a temperature-controlled resistance sleeve for preheating welding wire, which can control the temperature of the wire material within a certain range by heating the low-resistivity welding wire through resistance heating, high-frequency induction, and auxiliary arc, but its structure Complex, small temperature monitoring range, not suitable for plasma arc additive manufacturing

Literature "TIG welding method of aluminum alloy with high frequency induction heating wire" (Fan Chenglei, Liang Yingchun, Yang Chunli, etc. TIG welding method of aluminum alloy with high frequency induction heating wire[J]. Welding Journal, 2006,27(7):49-52 .) Thermocouples are used to detect the temperature of the wire. Due to the continuous feeding of the wire, the contact stability between the thermocouple and the wire is poor, resulting in large errors and low accuracy of the measured welding wire temperature.

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