Laser thermo-assisted metal/thermoplastic friction thermo-compression connecting device and method

Abstract

The invention discloses a laser thermo-assisted metal / thermoplastic friction thermo-compression connecting device and method. The device comprises a worktable, a laser heater, a rotary punching head and a computer control system; a metal sheet and thermoplastic are fixed to the worktable through a clamp from top to bottom; the rotary punching head is connected with a main shaft of a machine tool;the laser heater is placed in front of the rotary punching head and is kept moving in the same direction and at the same speed as the rotary punching head; and the laser heater and the rotary punchinghead are separately and electrically connected with the computer control system. According to the device and the method, the connecting process is simple; other connecting media are not required; andhigh-efficiency connecting of the metal sheet and the thermoplastic can be realized.

Description

technical field [0001] The invention relates to the new technical field of thin plate material connection, in particular to a device and method for laser thermally assisted metal / thermoplastic frictional heat-compression connection. Background technique [0002] With the increasing requirements for energy saving and emission reduction, the use of "plastic strip steel" has become the only way to reduce the weight of the structure. For example, fiber reinforced composite materials are more and more widely used in the field of engineering manufacturing due to their excellent material properties. . As a result, a large number of heterogeneous laminated composite structures of metal / thermoplastic plastic plates appear in mechanical structural parts. In the design process of this type of structure, it is the key to realize the reliable connection between the two. Among the commonly used connection methods at present, when mechanical connection methods (such as riveting, bolt con...

AI Technical Summary

Problems solved by technology

Among the commonly used connection methods at present, when mechanical connection methods (such as riveting, bolt connection, etc.) are used, on the one hand, the existence of the connecting parts increases the weight of the structural parts, which is not conducive to light weight; on the other hand, the mechanical connection needs to make holes. The existence of holes will destroy the continuity of the structure, easily cause damage to the connection area, and it is also difficult to meet the structural sealing requirements

Gluing is easy to cause volatile environmental pollution and affect the physical and mental health of operators

Although the laser connection is fast, it is easy to cause problems such as interlayer ablation, porosity, and low connection strength; when welding is used for materials with large differences in physical and chemical properties such as metals and non-metals, there is a problem of poor welding performance. The thermoplastic matrix material has a low melting point, and traditional welding methods are difficult to meet the connection requirements of heterogeneous laminated structures, and cannot achieve high-quality and efficient connections

The shortcomings of these traditional connection technologies limit the further application of metal / thermoplastic laminated structures. Therefore, it is urgent to develop new connection technologies to promote the practical application of heterogeneous laminated composite structures, which is also important for other dissimilar material connection problems. reference value

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