Polyester material friction welding module based on high-frequency vibration and geogrid

Abstract

The invention discloses a polyester material friction welding module based on high-frequency vibration and a geogrid. The polyester material friction welding module comprises an ultrasonic generator,an ultrasonic transducer, an amplitude modulator and a friction welding head, wherein the ultrasonic generator is used for converting 50-60 hertz electric energy into 15-40 kilohertz high-frequency electric energy; the ultrasonic transducer is used for converting the high-frequency electric energy converted and output by the ultrasonic generator into mechanical motion with the same frequency; theamplitude modulator is used for modulating the mechanical motion output by the ultrasonic transducer into a high-frequency low-amplitude vibration source; the friction welding head is used for carrying out friction welding on the high-frequency low-amplitude vibration source; a friction welding working face is arranged in the outer end area of the upper surface of the friction welding head; a plurality of needle plate structures are arranged on the surface of the friction welding working face in an array mode; and longitudinal slots distributed in the axial direction and stress dispersion grooves distributed in the transverse direction are formed in the friction welding head. In the welding process of the PET geogrid, the enough peeling strength can be improved, and meanwhile the strengthchange of a PET material can be reduced.

Description

【Technical field】 [0001] The invention belongs to the technical field of new material welding, and in particular relates to a polyester material friction welding module and a geogrid based on high-frequency vibration. 【Background technique】 [0002] PET material is a crystalline polyester material with orderly molecular arrangement and obvious melting point and refreezing point; solid crystalline polymer is elastic and can absorb part of high-frequency mechanical vibration. Therefore, when using ultrasonic welding, Ultrasonic vibration energy is not easy to transmit vibration energy to the pressing surface, so it is necessary to continuously increase the amplitude and vibration time to obtain the temperature required for the welding of the pressing surface; The PET material will destroy its own molecular structure, resulting in a decrease in strength and an increase in elongation at break. The PET geogrid welded and formed in this way in China generally has low peeling force...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a polyester material friction welding module based on high-frequency vibration, while solving the problem of welding quality and maintaining the self-strength of polyester material in ultrasonic welding of PET polyester material; in the welding of PET geogrid During the process, it can not only increase the sufficient peel strength, but also reduce the strength change of the PET material itself.

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