Heating device for Hopkinson pressure bar test

Abstract

The invention discloses a heating device for a Hopkinson pressure bar test, which comprises a movable supporting platform, a tubular heating furnace and an electric control box. The tubular heating furnace is mounted on a sliding plate of the movable supporting platform. Two groups of sliding rails and a plurality of fixed sliding beads are arranged on the upper surface of the sliding plate. Two alundum tubes are symmetrically sleeved at two ends of a heat-resistant steel tube. Heat-resistant bricks are respectively built around the external surfaces of the joints of the two alundum tubes and the heat-resistant steel tube. The heat-resistant bricks are provided with through holes for mounting silicon carbide rods. Insulating linings are sleeved on the external surfaces of a hearth and the heat-resistant bricks. Positions where inner cavities of the insulating linings correspond to the through holes on the heat-resistant bricks are all provided with mounting holes of the silicon carbide rods. Aluminum silicate fibrous carpets package the external surfaces of the insulating linings. A furnace shell is packaged on the external surfaces of the aluminum silicate fibrous carpets and the insulating linings. A base is fixed on the furnace shell. Two heat-insulating covers are respectively mounted in the hearth from hearths at two ends, and end cover bolts are fixed at two ends of the furnace shell. In the invention, the tubular heating furnace can move in the up-and-down direction, the leftward-rightward direction and the frontward-backward direction of the platform, and the heating device has the characteristics of good heat-insulating performance and convenience in repair.

Description

technical field [0001] The invention belongs to the technical field of material dynamic test and dynamic signal measurement, and in particular relates to a heating device for a Hopkinson compression bar test in which the material temperature is normal temperature to 1200°C. Background technique [0002] Generally speaking, when using the Hopkinson compression bar test technique to test the dynamic mechanical properties of materials at different temperatures, the specimen must be heated in advance. The axis should be aligned with the axis of the pressure bar and keep a constant temperature, so it is necessary to use a heating device to heat the test piece, and use a thermal insulation positioning device to insulate and test the test piece. The current high-temperature Hopkinson pressure bar test method There are two types, and the requirements for the heating device and the heat preservation positioning device are also different. [0003] One is the test method of simultaneo...

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Problems solved by technology

[0009] In order to overcome the deficiencies in the existing technology, such as complicated device modification, high cost, low test success rate, inconvenient adjustment of the simple heating device, inaccurate positioning of the test piece, and large error of the simple thermal insulation positioning device in the prior art, The invention proposes a heating device for the Hopkinson compression bar test

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