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    • 2. 发明公开
    • JOINTS WITH GAPS
    • 使用列链接
    • EP0696241A1
    • 1996-02-14
    • EP94913181.0
    • 1994-04-25
    • BALL BURNISHING MACHINE TOOLS LIMITED
    • LINZELL, Geoffrey, Robert 12 Brookmans Avenue
    • B23K20B23K35
    • B23K20/16B23K35/02B23K35/0244B23K35/22B23K35/3613Y10T29/49945
    • In the Specification of our International Patent Application PCT/GB 91/00950 there is described and claimed a method of securing against lateral motion two bodies held in face to face asperity contact, thereby to make a join between the two bodies, in which methods there is inserted into the interface between the two bodies a material that on minimal initial lateral relative motion of the two surfaces promotes rapid but controllable "galling" between the two surfaces, this galling binding the surfaces against further such motion. However, this method requires the two surfaces to fit well one to the other, and without such a good fit the resultant join may not be entirely satisfactory. The present invention's proposed solution to this gap problem is to use a metal-particle-containing composition comprising the gall enhancing agent loaded with a myriad of small metal particles, which composition can be packed into the gap, and will flow to accommodate a wide range of gap sizes and also to accommodate out-of-round distortion. The composition can take various physical forms, typically those of a free-flowing powder, a viscous liquid, or a stiff paste (and the powders have an additional use in the preparation of preforms for the manufacture of sintered parts).
    • 10. 发明授权
    • GALLED JOINTS MADE WITH ELECTRIC HEATING
    • 电加热摩擦焊接
    • EP0670759B1
    • 1997-08-13
    • EP93901826.3
    • 1993-01-11
    • BALL BURNISHING MACHINE TOOLS LIMITED
    • LINZELL, Geoffrey, Robert 12 Brookmans Avenue
    • B23K20/12
    • B23K20/16B23K20/12B23K35/02B23K35/22B23K35/3613
    • The invention, the subject of our International Application PCT/GB 91/00950 provides a method of securing against lateral motion two bodies held in face-to-face asperity contact, thereby to make a join between the two bodies, in which method there is inserted into the interface between the two bodies a material that on minimal initial lateral relative motion of the two surfaces promotes rapid but controllable 'galling' between the two surfaces, this galling binding the surfaces against further such motion. The present invention relates to improvements in galled joints generally, as well as more specifically both to an improvement of our earlier Application's method to facilitate its use over a wider range of interfacial conditions, and also to an addition of that method to permit in some favourably configured joints the converting of the galled contacts therewithin into actual inter-metallic diffusion bonds across the interlocked (joined) faces to form continuous welds. The invention proposes that, while and/or after a galled joint is formed, an electric current be passed across the joint. If the current is provided during joint formation then the supplied external mechanical energy is supplemented by the electric current energy so as selectively to heat and soften the touching asperities, enabling them to deform and flatten more rapidly to bring other smaller asperities nearby into contact and thus increase the number of gall sites. If the current is provided after joint formation, then it is believed that it results in the stimulation and/or acceleration of the formation of diffusion bonds across the opposed faces of the joint.