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Measuring device for internal stress and its distribution during solidification and molding of explosives

A technology of curing molding and measuring device, applied in the direction of measuring device, measuring force, instrument, etc., to achieve the effect of fast and cheap measurement

Inactive Publication Date: 2016-09-14
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitations of testing technology, there is currently no sensor or device that can directly measure the internal stress of the propellant during the curing process. Therefore, the measurement and effective control of the internal stress and distribution of the propellant during the curing molding process is currently a challenge for the propellant charge. The "bottleneck" problem that needs to be solved urgently

Method used

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  • Measuring device for internal stress and its distribution during solidification and molding of explosives
  • Measuring device for internal stress and its distribution during solidification and molding of explosives
  • Measuring device for internal stress and its distribution during solidification and molding of explosives

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Embodiment 1

[0017] refer to Figure 1 to Figure 5 , this embodiment gives a specific structure and manufacturing and assembly examples of a device for measuring internal stress and its distribution during the solidification and molding of propellants and explosives. The device for measuring the internal stress and its distribution during the solidification and molding process of the propellant and explosive at least includes a charge cartridge 1 , a stress measuring frame 2 and a sealing ring 3 .

[0018] see figure 2 , The cartridge 1 is composed of a cylinder body 1-1, a flat end cap 1-2 and a threaded end cap 1-3. Cylinder 1-1 is made of stainless steel, with openings at both ends, and external thread at the lower end, the thread height is 12mm-18mm, and 6 threaded holes of M5-M8 are evenly distributed on the upper end surface along the circumference with a diameter of 80mm-130mm. The depth is 10mm~15mm, the outer diameter of the cylinder 1-1 is 100mm~150mm, the inner diameter is 60...

Embodiment 2

[0023] This embodiment provides the measurement of the internal stress and its distribution during the solidification and molding process of a poured PBX explosive using the propellant and explosive solidification molding process internal stress and distribution measuring device manufactured in Example 1.

[0024] In this embodiment, the inner diameter of the cartridge is 80mm, the outer diameter is 120mm, and the height is 400mm, and the stress measurement is performed at three positions in it. Measuring point 1 is at the center; Measuring point 2 is 100mm from the upper end of the cartridge and 20mm to the left of the central axis of the cartridge; Measuring point 3 is 100mm from the lower end of the cartridge and 20mm to the right of the central axis of the cartridge position, see the location of measuring points Figure 5 .

[0025] Fix the threaded end cap 1-3 on the lower end surface of the barrel 1-1 through threaded connection; pour the PBX explosive slurry into the c...

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Abstract

The invention discloses a measuring device for internal stress and its distribution during the solidification and molding process of propellants and explosives, which is mainly composed of a charge cartridge, a stress measuring frame, a sealing ring and the like. The measurement device uses the principle of strain gauge measurement to measure the internal stress and its distribution. A stress measurement frame with a hollow cube is designed. The strain gauge is pasted on an outer surface of the hollow cube, and the hollow cube is fixed by the stress measurement frame. At different positions in the charge barrel, the stress generated by the propellant during the curing process will cause the strain gauge and the surface of the hollow cube pasted together to deform synchronously. The strain-time curve of the propellant and explosive can be obtained by using Hooke's law to obtain the stress value and its stress distribution at different moments during the solidification process of the propellant and explosive.

Description

technical field [0001] The invention relates to a measuring device for internal stress and distribution of propellants and explosives, which is suitable for the field of propellants and explosives. Background technique [0002] During the solidification and molding process of casting or pouring explosives, due to the change of phase state or the change of solidification temperature, stress will be generated inside the shaped charge, which will not only make the mechanical properties and structural integrity of the shaped explosives column Changes in the properties of the powder lead to cracks inside the powder column and deformation of the charge body, which ultimately affects the firing safety of the propellant charge. Therefore, to accurately measure the stress and stress distribution during the solidification and molding of propellants and explosives, and to study the various factors and influence degrees that affect the generation of internal stress during the solidifica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/00
Inventor 王晓峰冯晓军徐洪涛赵娟田轩封雪松陈春燕
Owner XIAN MODERN CHEM RES INST