Repair welding method and welding tool of stirring friction plug for friction preheating of telescopic shaft shoulder

A friction stir and telescopic shaft technology, used in welding equipment, manufacturing tools, non-electric welding equipment and other directions, can solve the problems of poor continuous fluidity of materials, poor mechanical properties of welded joints, fractures, etc. The effect of improving mechanical properties and simplifying repair welding process

Inactive Publication Date: 2012-06-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that during the repair welding process of the filled friction stir plug, since the material of the repair welding part is not preheated, its strong resistance will cause the stirring needle to break without complete plastic deformation, so that the continuous Poor fluidity leads to poor mechanical properties of welded joints, providing a retractable shoulder friction preheating friction stir plug repair welding method and its welding tools

Method used

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  • Repair welding method and welding tool of stirring friction plug for friction preheating of telescopic shaft shoulder
  • Repair welding method and welding tool of stirring friction plug for friction preheating of telescopic shaft shoulder
  • Repair welding method and welding tool of stirring friction plug for friction preheating of telescopic shaft shoulder

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specific Embodiment approach 1

[0018] Specific implementation mode one: combine figure 1 , Figure 5 , Figure 6 and Figure 7 Describe this embodiment, this embodiment is realized through the following steps: 1. The selection of the material of the stirring needle: the material of the stirring needle 3-1 is the same as that of the parts to be repaired; 2. Open the cone-shaped defect repair preset hole: Make a positioning hole at the weld defect to be repaired, and use a type drill to expand the positioning hole into a tapered hole according to the repair welding requirements. The tapered hole is the pre-set hole for repairing the tapered defect to be repaired; Needle size: the external contour dimension of the stirring needle 3-1 should be larger than the internal contour dimension of the conical defect repairing preset hole, so as to ensure sufficient friction and sufficient filling volume between the stirring needle and the defect repairing preset hole; 4. Conical defect repair preset hole positioning...

specific Embodiment approach 2

[0019] Specific implementation mode two: combination Figure 1 ~ Figure 4 Describe this embodiment, this embodiment comprises welding tool holding body 1, telescopic shoulder 2, stirring body 3, spring 4, four limit plates 5 and at least four keys 6, and stirring body 3 is formed by stirring needle 3-1 It is composed of the stirring needle handle 3-2, the stirring needle handle 3-2 and the stirring needle 3-1 are integrated from top to bottom, and the outer surface of the stirring needle handle 3-2 is provided with a stirring needle clamping surface 3-2- 1. The stirring needle 3-1 is a cone, and the welding tool holder 1 is composed of a coaxial upper cylinder 1-1 and a lower cylinder 1-2, and the diameter of the upper cylinder 1-1 is smaller than that of the lower cylinder 1- 2, the upper cylinder 1-1 and the lower cylinder 1-2 are integrated, the outer surface of the upper cylinder 1-1 is provided with a welding tool clamping surface 1-1-1, and the lower cylinder 1-2 There ...

specific Embodiment approach 3

[0020] Specific implementation mode three: combination figure 1 To illustrate this embodiment, the lower end surface of the lower ring 2-2 of this embodiment is provided with a concave shoulder surface 2-2-1 whose outer edge is higher than the center. The concave shoulder surface 2-2-1 effectively prevents the material plasticized by the stirring needle 3-1 from flowing out. Other components and connections are the same as those in the second embodiment.

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Abstract

The invention provides a repair welding method and a welding tool of a stirring friction plug for friction preheating of a telescopic shaft shoulder, which relates to a repair welding method and a welding tool of a filling type stirring friction plug. The invention solves the problems that in the repair welding process of the filling type stirring friction plug, strong resistance causes a stirring needle to be broken when the stirring needle does not completely plastic deformation so that the continuous fluidity of materials is poor. The method comprises the following steps: (1) taking the same materials for the stirring needle and the repair welded part; (2) punching a conical defect repair preset hole; (3) determining the size of the stirring needle; (4) positioning the conical defect repair preset hole; (5) preheating by friction; and (6) carrying out repair welding. The welding tool is characterized in that an upper circular ring on the telescopic shaft shoulder is connected with a lower cylinder on a clamping body of the welding tool through a key, a spring is arranged between the upper end surface of a lower circular ring on the telescopic shaft shoulder and the lower end surface of the lower cylinder, the lower cylinder is connected with the outer surface of the lower circular ring by a limiting plate, and a stirring body is arranged in a clamping hole on the clamping body of the welding tool and a through hole on the telescopic shaft shoulder. The invention is used for stirring friction welding of welded seam keyholes and repair welding of defects.

Description

technical field [0001] The invention relates to a filling type friction stir plug repair welding method and a welding tool thereof, which are used for repair welding of keyholes and defects of friction stir welding welds. Background technique [0002] Since the British Welding Institute (TWI) invented the friction stir welding method in 1991, this technology can eliminate welding defects such as pores, inclusions, cracks, etc. And it does not produce arc light, smoke, noise pollution, etc., and at the same time can significantly reduce costs, save materials, optimize structures, and reduce the structural weight of aircraft, etc., which have attracted the attention of scientific research institutions in various countries. Because this technology has many remarkable features that other methods do not have, it will soon be used in the aerospace field, and this method is selected for the welding of the longitudinal seam of the core tank section of the new generation of launch ve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/24B23K20/12
Inventor 黄永宪韩冰刘会杰冷劲松李垚
Owner HARBIN INST OF TECH
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