Three-ring solid phase spot welding method

A solid phase point and collar technology, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of weak vertical interface, large welding tool load, low welding efficiency, etc., and can solve the problem of excessive upsetting force. Large, the effect of solving the weak connection problem

Active Publication Date: 2017-05-10
SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a three-ring solid-phase spot welding method, which solves the problem of weak connection of the vertical interface of the traditional filled friction spot welding spot, welding tool load The problem of too large and the problem of low welding efficiency

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0022] Such as Figure 1 to Figure 5 As shown, the three-ring solid-phase spot welding method provided by the preferred embodiment of the present invention comprises the following steps:

[0023] 1) Compression preheating stage: the outer ring 3 is pressed against the surface of the workpiece, which provides an axial displacement reference for the welding tool, and plays the role of constraining the material. The middle ring 2 and the inner ring 1 are pressed against the surface of the workpiece at the same speed When rotating, the frictional heat generated with the surface of the base metal will make the surrounding metal reach a plastic softening state.

[0024] 2) Extrusion and forging stage: while the inner collar 1 rotates at a high speed, it squeezes the base material downward, and the plastic metal 9 is discharged outward, and the midd...

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Abstract

The invention provides a three-lantern ring solid-phase spot welding method. A welding tool comprising an inner lantern ring, an intermediate lantern ring and an outer lantern ring is used, and welding is realized through rotation and axial motion of the inner lantern ring and the intermediate lantern ring. The three-lantern ring solid-phase spot welding method comprises the following steps of: compressing and pre-heating; extruding and forging; connecting with an interface by friction; backfilling and forging a material; and forming welding spots and grinding. The key innovation of the invention is that, a cylindrical sliding block is arranged at the center of the inner lantern ring, so that the function of preventing a welded metal at the lower part from moving axially can be realized under the action of elastic force of a spring. According to the innovative design disclosed by the invention, the inner lantern ring has stronger capability of drilling the material during downward extrusion, and the material can be extruded to the outer side under smaller downward upsetting force; and during the follow-up backfilling process of the material, as the material on the outer side of the inner lantern ring needs to be extruded and backfilled inwards, the interface can generate a mass transfer effect, and the weak connection problem of the vertical interface of a traditional filling type friction spot welding does not exist any more.

Description

technical field [0001] The invention belongs to the field of welding, and in particular relates to a three-ring solid-phase spot welding method. Background technique [0002] In the field of solid phase spot welding, there are currently two welding methods: one is the in-line friction stir spot welding method, that is, on the basis of the friction stir welding technology, the shoulder of the welding tool and the stirring are used to perform in-situ friction on the material. Stir to form a spot-welded joint. In this spot welding method, there is an exit hole for the stirring pin on the surface of the spot welding spot, that is, a keyhole, and the surface is uneven. For example, the Chinese patent CN101053923A disclosed on October 17, 2007 a patent for a stirring head used in the friction stir spot welding technology belongs to this technical field. [0003] Another friction spot welding method is in-situ filling friction spot welding, which was developed by the German GKSS ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12
Inventor 封小松姚君山崔凡徐奎孙耀华
Owner SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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