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Precise preparation method of metal tube axial loading mechanical sample

A technology for metal tubes and transmission shafts, applied in metal processing equipment, welding equipment, manufacturing tools, etc., can solve problems such as changes in the structure and performance of welding materials, deformation of samples, etc., and achieve low-stress precision welding, small welding deformation, and good quality. reliability effect

Active Publication Date: 2020-12-25
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to improve the existing metal welding connection method to overcome the welding stress caused by the input of welding heat in the prior art, thereby causing the deformation of the sample, And the changes in the structure and properties of welding materials caused by the input of welding heat

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  • Precise preparation method of metal tube axial loading mechanical sample
  • Precise preparation method of metal tube axial loading mechanical sample
  • Precise preparation method of metal tube axial loading mechanical sample

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Embodiment Construction

[0045] The following describes several preferred embodiments of the present invention with reference to the accompanying drawings, so as to make the technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned herein.

[0046] In the drawings, components with the same structure are denoted by the same numerals, and components with similar structures or functions are denoted by similar numerals. The size and thickness of each component shown in the drawings are shown arbitrarily, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of parts is appropriately exaggerated in some places in the drawings.

[0047] Such as figure 1 with figure 2 As shown, the three-way clamping rotary welding tool provided by the present invention is ...

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Abstract

The invention discloses a precise preparation method of a metal tube axial loading mechanical sample, and relates to the technical field of material processing engineering. The method comprises the following steps that step one, a dumbbell-shaped sample is assembled, wherein a to-be-tested metal tube and two axisymmetric stepped plugs are assembled in a butt joint form to form the dumbbell-shapedsample, the outer diameter of each stepped plug is machined into a thread shape, and the stepped plugs are used for being connected with threads on a loading head of a mechanical testing machine; steptwo, the dumbbell-shaped sample is installed in a three-way clamping device and fixed; step three, a laser welding gun is arranged at the upper end of the three-way clamping device, a laser spot is moved to a weld joint, and laser welding parameters, the angular speed of a motor rotating shaft and the powder feeding speed of adding metal powder into a welding molten pool are set; and step four, shielding gas is started, a motor and a coaxial powder feeding device are started, a laser welding system is started, and sample welding manufacturing is carried out.

Description

technical field [0001] The invention relates to the technical field of material processing engineering, in particular to a precision preparation method of a metal tube axially loaded mechanical sample, and also to a three-way clamping rotary welding tool. Background technique [0002] The mechanical properties of metal pipes often need to be evaluated by axial loading mechanical tests, such as tensile tests, creep tests and endurance tests. In the mechanical test, the sample needs to be clamped on the chuck of the mechanical testing machine, and the loading force of the mechanical testing machine is transmitted to the sample to induce material deformation and detect parameters such as force and displacement during the deformation process for evaluation The mechanical properties of the samples. In order to prevent the deformation and fracture of the clamping section of the connecting part of the sample and the clamp from affecting the accuracy of the evaluation of the mechan...

Claims

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Application Information

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IPC IPC(8): B23K26/02B23K26/21B23K26/70
CPCB23K26/02B23K26/21B23K26/702
Inventor 聂璞林王亚东黄坚姚成武李铸国
Owner SHANGHAI JIAO TONG UNIV
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