A forming device for complex curved bulletproof inserts

Abstract

The invention discloses a forming device for a complex curved surface bulletproof insert plate, which comprises a furnace shell, a furnace cover, a support frame and a furnace cylinder. In the furnace shell, a setter assembly for supporting boron carbide ceramics is placed in the furnace barrel, and a forming detection assembly is fixed on the outer wall of the bottom of the furnace barrel. The present invention improves and optimizes the setter plate in the furnace barrel, thereby Make it possible to monitor the volume shrinkage and deformation of the boron carbide ceramic body during the firing process, and use the transmission parts to respond when the body shrinks and deforms, so that the forming detection component can detect it and start to control the temperature in the furnace , so as to realize the temperature control of the body deformation during the firing process of boron carbide ceramics, so as to avoid the influence of the firing quality of the body due to the high or low temperature.

Description

technical field [0001] The invention relates to the technical field of firing a boron carbide ceramic body, in particular to a forming device for a complex curved surface bulletproof insert. Background technique [0002] In the actual application of the bulletproof insert, in order to ensure the comfort of the user, its shape is ergonomically designed and composed of complex curved surfaces with continuous gradients. In order to ensure the curved surface structure of the bulletproof board, the ceramic material used must also have the same complex curved surface. In the pressureless sintering process of boron carbide ceramics, due to the need to meet the densification requirements, the product will shrink by about 20% in the high-temperature sintering furnace. The shrinkage of the volume will cause the shape of the curved surface of the product to change, and this shrinkage and The shape change process is all completed above 2200°C. In such an ultra-high temperature environm...

AI Technical Summary

Problems solved by technology

In the pressureless sintering process of boron carbide ceramics, due to the need to meet the densification requirements, the product will shrink by about 20% in the high-temperature sintering furnace. The shrinkage of the volume will cause the shape of the curved surface of the product to change, and this shrinkage and The shape change process is all completed above 2200°C. In such an ultra-high temperature environment, the temperature detection part of the thermocouple will be melted and damaged due to excessive temperature, directly losing the ability to test the temperature. For high-level measurement, infrared testers are commonly used at present. The principle of infrared thermometers is an idealized radiator. , however, the actual objects existing in nature are almost not black bodies, and the radiation amount of all actual objects depends not only on the radiation wavelength and the temperature of the object, but also depends on the type of material constituting the object, the preparation method, the thermal process, the surface state and the Environmental conditions and other factors; these main factors affecting emissivity, such as: material type, surface roughness, physical and chemical structure and material thickness, etc., directly lead to the deviation between the temperature value measured by the infrared tester and the actual temperature value, this deviation value The higher the temperature, the larger the

[0003] All in all, when the temperature is above 2200°C, it is very difficult to control the temperature. If the sintering temperature is too low, the density of boron carbide ceramics will not meet the requirements. If the sintering temperature is too high, the grains will be coarse and even the green body will collapse, resulting in a high scrap rate. , it is very difficult to produce and control. Therefore, we propose a forming device for bulletproof inserts with complex curved surfaces

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