Forming process and device of complex curved-surface bullet-proof insert plate

Abstract

The invention discloses a forming process and device of a complex curved-surface bullet-proof insert plate. The forming process comprises the following steps that 1, boron carbide powder is granulatedthrough pulping and spray drying, the surfaces of powder particles are modified, a sintering aid is added, the activity between the boron carbide particles in the sintering process is promoted, and ablank is prepared through pressing by using a steel mold; and 2, the prepared blank is placed in a sintering furnace and subjected to vacuum sintering to 2200 DEG C, the temperature is kept for 60 minutes, and after sintering is completed, the blank is cooled and taken out of the furnace. According to the forming process and device of the complex curved-surface bullet-proof insert plate, a loading plate is arranged in the sintering furnace, the temperature of air flow directly making contact with the complex curved-surface bullet-proof insert plate and the loading plate is kept relatively uniform, and meanwhile, the loading plate can stably support the complex curved-surface bullet-proof insert plate, so that the stability of the bullet-proof insert plate in the sintering furnace during sintering is further improved.

Description

technical field [0001] The invention relates to the technical field of bulletproof board processing, in particular to a forming process and device for bulletproof boards with complex curved surfaces. Background technique [0002] The multi-curved bulletproof insert is a continuous and gradual complex curved surface. The product is composed of circular arcs with different curvatures at each position. The blanks in the compression molding stage in the pressureless sintering process require that the density of the blanks at each position should be basically equal. This requires that the weight of the powder distributed in each unit volume of the blank should be substantially equal before compression molding. [0003] In the actual application of the bulletproof board, in order to ensure the comfort of the user, its shape is composed of an ergonomically designed, continuous and gradually changing complex curved surface. In order to ensure the curved surface structure of the bull...

AI Technical Summary

Problems solved by technology

[0004] In the pressureless sintering process of boron carbide ceramics, due to the need to meet the densification requirements, the product is placed on the sintering plate, which is placed inside the high-temperature sintering furnace for sintering deformation. There will be a process of volume shrinkage of about 20%, and the volume shrinkage will cause the shape of the curved surface of the product to change, and the process of shrinkage and shape change is all completed above 2200°C. In this ultra-high temperature environment, thermoelectric The measuring part of the pair will be damaged due to excessive temperature. At the same time, during the deformation process of the product, because the bulletproof plate is a complex curved shape, and the internal temperature of the sintering furnace is controlled by heating, heat preservation, cooling and cooling. Therefore, it often occurs that the temperature distribution in the airflow in contact between the bulletproof plate and the setter plate is uneven, which makes the production and control of the bulletproof plate very difficult. For this reason, we propose a complex curved surface Forming Technology and Device of Bulletproof Insert

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