Testing core rod and detection method for detecting mechanical property of connection sleeve

A technology for connecting sleeves and detection methods, which is applied in the field of test mandrels for detecting the mechanical properties of connecting sleeves, and achieves the effects of simple operation, improved test efficiency, and high detection efficiency

Active Publication Date: 2014-02-26
WUKUN STEEL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current technical regulations for mechanical connection of steel bars only stipulate the detection device for the mechanical properties of the joints, and the mechanical properties of the joints are related to factors such as sleeve performan

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  • Testing core rod and detection method for detecting mechanical property of connection sleeve

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[0013] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or improvements made based on the teaching of the present invention belong to the protection scope of the present invention.

[0014] like figure 1 As shown, the present invention is used to detect the test mandrel of the mechanical performance of the connecting sleeve, the middle part of the mandrel is a cylindrical clamping section 4, and the two ends are respectively provided with connecting sections 2, and its diameter is smaller than the diameter of the cylindrical clamping section 4 . The tensile load of the mandrel is greater than or equal to 1.2 times the specified tensile load of the connecting sleeve 1 .

[0015] The connecting section 2 of the mandrel is provided with an external thread to match the internal thread of the sleeve 1 .

[0016] The diameter of the clamping section 4 of the mandre...

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Abstract

The invention discloses a testing core rod and a detection method for detecting a mechanical property of a connection sleeve. The middle part of the testing core rod is a cylindrical clamping section and connection sections are arranged at the two ends of the core rod respectively; the diameter of each connection section is less than that of the cylindrical clamping section. A tensile load of the core rod is more than or equal to 1.2 times the specified tensile load of the connection sleeve. The detection method sequentially comprises the following steps: connecting a barrel rod, applying a pressure to an opposite vertex, testing and detecting, and rechecking and reutilizing. A principle that the strength and the rigidity of the testing core rod with the connection sections at the two ends are higher than those of the connection sleeve is adopted, namely quenching and tempering treatment is carried out and threads of the connection sections are hardly damaged when the testing core rod is used for detecting the mechanical property of the connection sleeve, so that the testing requirements of the detected sleeve are met and the testing core rod is repeatedly used for a plurality of times; the testing efficiency is improved and the testing cost is reduced. The testing core rod and the detection method have the advantages of simple structure, simplicity and convenience for operation, high detection efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of material mechanical performance detection, and in particular relates to a test mandrel for detecting the mechanical performance of a connecting sleeve and a detection method thereof. Background technique [0002] The steel bar straight thread connection sleeve is a key part of the mechanical connection of steel bars, and is widely used in building reinforced concrete projects. Two steel bars with threaded ends are screwed in from both ends of the sleeve and tightened to complete the straight thread mechanical connection of the steel bars. A member formed by combining two bars and a connecting sleeve to form a bar straight thread mechanically joined joint. The mechanical properties of the joints directly affect the transmission of the force of the reinforced steel in the building components, thus affecting the safety and reliability of the building structure. The current technical regulations for mechani...

Claims

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Application Information

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IPC IPC(8): G01N3/02G01N3/00
Inventor 肖华强王宁罗屏周明珠汪涛王文锋
Owner WUKUN STEEL
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