Forming device for bulletproof insert plate with complex curved surface

Abstract

The invention discloses a forming device for a bulletproof insert plate with a complex curved surface. The device comprises a furnace shell, a furnace cover, a supporting frame and a furnace barrel, wherein the furnace cover is arranged at the end port in the furnace shell through a rotating shaft frame, the furnace barrel is arranged in the furnace shell through a supporting frame, a setter plateassembly used for bearing boron carbide ceramic is placed in the furnace barrel, and the outer wall of the bottom of the furnace barrel is fixedly provided with a forming detecting assembly. According to the device, the setter plate in the furnace barrel is improved and optimized so that the volume shrinkage deformation of a boron carbide ceramic green body in the firing process can be monitoredthrough the setter plate; the reaction is performed by using a transmission part during shrinkage deformation of the green body so that the forming detecting assembly can detect the shrinkage deformation of the green body; and the temperature in a furnace is started to be controlled so that the temperature of the boron carbide ceramic during green body deformation in the firing process can be controlled, and the influence of over-high or over-low temperature on the green body firing quality is avoided.

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...

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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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