A Method for Realizing Controllable Gap Connection of Hard Materials in Atmospheric Environment

Abstract

The invention provides a method for implementing controllable gap connection of hard materials in atmospheric environment by heating and cooling with mould and a mould applied in the method. The hard materials to be connected include ceramic, glass and other hard materials. The method based on the existing mechanical vibration connection methods, such as ultrasonic-assisted connection, is characterized in that a special clamping mould is used, overall heating and cooling with mould is applied, and the method is organically used with high frequency vibration assisted connection to allow for reliable connection of hard materials in atmospheric environment. Using the special clamping mould has the advantages that connecting process devices are simplified, operation is simple; the materials to be connected are clamped to ensure stability of overall structure; gap between joint surfaces is controlled; sufficient pre-pressure is provided; the clamping mould serves as an indirect heating source to input sufficient heat for joints; cooling rate is retarded; separation of the connected workpieces is simplified.

Description

technical field [0001] The present invention relates to a method for connecting hard materials with controllable gaps through mold heating and cooling in an atmospheric environment and a mold used in the method, in particular to a fast, Efficient and strong connection method. Background technique [0002] With the advancement of science and technology and the development of social production, hard materials such as ceramics (oxide ceramics, nitride ceramics, boride ceramics, carbide ceramics, etc.), glass (oxide glass and non-oxide glass) and metal compounds or minerals Such materials have been widely used because of their excellent properties. Ceramics are widely used in materials engineering, electronic engineering, chemical engineering and mechanical engineering because of their excellent performance in terms of electrical properties, chemical properties, optical properties and heat resistance, which metals and other polymer materials cannot do. Especially in aerospace,...

AI Technical Summary

Problems solved by technology

Mechanical connections mainly include hinged joints and bolted joints. However, the joints obtained by this method have poor strength and tightness, and are difficult to machine and cause great damage to the material matrix. Therefore, they cannot be widely used in occasions that have strict requirements on performance; Due to its high connection quality and reliability, diffusion welding is usually widely used in the field of hard material connection

However, due to the shortcomings of traditional diffusion welding, such as high vacuum environment requirements, complex process equipment and long production cycle, it cannot be well adapted to the modern production development trend of green environmental protection, energy saving and emission reduction; mechanical vibration connection represented by ultrasonic connection method The method is receiving more and more attention because it can realize the connection of materials with simple equipment in a short time; however, traditional mechanical vibration connection methods such as ultrasonic welding also have obvious defects in the mechanical impact damage of the materials to be connected. And it is mostly used for the connection of hard materials and relatively soft metal materials (Al, Cu, Mg, etc.), and the application is subject to certain restrictions.

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