Gas cooling device for laser joining of thermoplastic composite material and metal and method

Abstract

The invention discloses a gas cooling device for laser joining of a thermoplastic composite material and metal and a method. The device comprises a computer control system, a laser welding system, a monitoring and feedback system and a self-adjusting gas cooling system, wherein the laser welding system carries out heating through a laser heat source so that a connected part realizes welding forming; the monitoring and feedback system is used for monitoring the surface temperature and feeding back the surface temperature to the computer control system in real time; and the self-adjusting gas cooling system adjusts the temperature of cooling gas in a self-adaptive mode according to the feedback information, and thus the purposes of eliminating heat accumulation of the formed part and improving welding precision are achieved. The problems that in the laser multi-pass joining process, the heat input amount is large, and the forming precision is poor are solved, meanwhile, the forming efficiency is guaranteed, and the control over the forming precision and quality in the laser multi-pass joining process can be realized.

Description

technical field [0001] The invention belongs to the technical field of laser connection of dissimilar materials, in particular to a gas cooling device and method for laser connection of thermoplastic composite materials and metals. Background technique [0002] Laser Joining Technology of Dissimilar Materials (LJTDM) is a thermal processing process that uses a laser beam as a heat source to join dissimilar materials together. Compared with the traditional connection process, the connection speed is fast, the response speed to the design is fast, and the digital, intelligent and parallel manufacturing can be realized efficiently. At the same time, the use of fillers and electrodes can be avoided, cost saving and pollution can be reduced; compared with the arc connection process Compared with LJTDM technology, the connection period of thick plates is significantly shortened, the range of heat-affected zone is small, and the deformation of connecting parts is small. It has broa...

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Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides a gas cooling device and method for joining thermoplastic composite materials and metal lasers, which can effectively avoid problems such as poor weld seam appearance and low forming precision, and at the same time eliminate the problem of jointing The heat accumulation effect inside the part can effectively improve the connection quality of the laser multi-channel connection formed parts between thermoplastic composite materials and metals

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