Combined feeler gauge tool capable of realizing step boring and depth control

Abstract

The invention discloses a combined feeler gauge tool capable of realizing step boring and depth control, and the gauge tool is used for calibrating and controlling multi-step boring depth in the process of measuring residual stress by a hole-drilling strain-gauge method. The process comprises the steps of setting twenty feeler gauges of assigned thickness by lamination, wherein the feeler gauge thicknesses are from 0.1mm-2mm and the intervals of adjacent feeler gauge are 0.1mm; feeler gauge anchoring bolts (3) are fixed inside a metal casing (2); and each feeler gauge can be screwed in or out the metal casing by winding each anchoring bolt. The feeler gauges in different thicknesses and the metal casing (2) are combined through the anchoring bolts. <{EN3}>Each position and size of an abnormal feeler gauge are optimized by appearance so that the abnormal feeler gauge can be engaged with a boring platform and a drilling rod perfectly; at the same time, a gap (5) for drawing the feeler gauges is left on the metal casing, so that the feeler gauges can be selected conveniently. <{EN4}>A manual multi-step boring depth control tool in the process of measuring the residual stress by the hole-drilling strain-gauge method is provided, and the tool has the advantages of high efficiency, simple operation and economical and practical benefits.

Description

Technical field [0001] The invention belongs to experimental equipment, in particular to the relevant field of manual multi-step drilling depth control tools in the process of measuring residual stress by the drilling strain method Background technique [0002] In actual engineering, when the external factors that produce stress are removed, there is still a force that can maintain self-balance inside the material. The superposition of the residual stress and the actual working stress during the service process of the component will have a great impact on the strength, stability and fatigue performance of the structure. When the component is loaded, when the working stress and the residual stress in the same direction are superimposed, this area will undergo plastic deformation, which will lose the ability to continue to carry, and reduce the effective bearing area of ​​the component. After finishing some components with residual stress, when a part of the material is removed fr...

AI Technical Summary

Problems solved by technology

However, our most commonly used low-speed manual drill cannot conveniently control the stepping hole depth. Generally, it is processed according to the uniform stress field, and the final depth is drilled at one time.

This practice of treating everything according to a uniform stress field will inevitably lead to deviations in measurement results

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