Metal fusion bonding – Process – Using only pressure
Patent
1990-10-05
1992-09-15
Rowan, Kurt
Metal fusion bonding
Process
Using only pressure
228125, 228213, 228 31, 228 443, B23K 2012
Patent
active
051470853
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a cold pressure welding method and a machine for carrying out such method.
According to the present invention there is provided a cold pressure welding method including positioning a first and a second workpiece with faces in axially abutting relationship in respective reciprocable, releasable, first and second clamp means, and reciprocating the clamp means alternately to apply and relax a welding pressure across the abutting faces to form an upset weld zone, in which material displaced as flash material at the upset weld zone is cleared from the weld zone intermediate successive reciprocations of the clamp means such that the cross-sectional area of the workpieces is maintained substantially constant between successive reciprocations of the clamp means applying and relaxing welding pressure.
According to a further aspect of the present invention there is provided a cold pressure welding machine including a main frame having a pair of side plates rigidly mounted on a base frame and braced apart by a plurality of guide rods, a pair of clamp bodies reciprocably mounted on the guide rods and each carrying a hydraulically actuable piston and cylinder assembly connected to effect reciprocal movement in a direction perpendicular to the guide rods of one of a pair of die halves positioned in the associated clamp body into and out of engagement with the other one of the pair of die halves secured to the associated clamp body, a plurality of tie rods extending through bores in the clamp bodies in a direction parallel to the guide rods and each connected to a piston and cylinder assembly hydraulically actuatable to move the clamp bodies the one toward the other, and means effective to urge the clamp bodies apart.
The invention will now be described, by way of example, with reference to the accompanying, partly diagrammatic drawings, in which:
FIG. 1 is a side elevation of a cold pressure welding machine, with hydraulic pipework omitted;
FIG. 2 is a front elevation of the machine shown in FIG. 1 and taken in the direction of the arrow II;
FIG. 3 is a cross-sectional elevation to an enlarged scale of a portion of the machine taken on the line III--III in FIG. 1;
FIG. 4 is a cross-sectional elevation to an enlarged scale of a portion of the machine taken on the line IV--IV in FIG. 1;
FIG. 5 is a cross-sectional elevation to an enlarged scale of a portion of the machine taken on the line V--V in FIG. 1;
FIG. 6 is a cross-sectional side elevation taken on the line VI--VI of FIG. 2 and omitting a set of dies;
FIG. 7 is a front elevation of a set of dies and first and second workpieces;
FIG. 8 is an end elevation of a pair of die halves taken on the line VIII--VIII of FIG. 7; and
FIG. 9 is a cross-sectional side elevation to an enlarged scale taken on the line IX--IX of FIG. 2.
The pressure welding machine includes a main frame 2 having mounted thereon, for horizontal reciprocal movement, a pair of clamp bodies 4,6. The main frame includes a pair of side plates 8, 10 rigidly secured to a base frame 12 and braced apart with three guide rods 14,16,18. The clamp bodies 4,6 are reciprocably positioned on the guide rods 14, 16, 18, which extend through bores in the clamp bodies. As shown in FIG. 3 the guide rods 14, 16 are provided with spacers 20 serving as backstops positioned intermediate the respective clamp body 4, 6 and the adjacent side plate 8, 10 and bushes 22 intermediate the guide rods and the clamp bodies. The bores in the clamp bodies are counter-bored at the adjoining faces to receive a single locating spacer 24.
As shown in FIG. 4, to facilitate the utilization of the machine for a range of workpiece diameters, a helical cam arrangementis provided in conjunction with the guide rod 18 to adjust the throw of the clamp bodies 4, 6 by adjusting the axial length of spacers 2 serving as backstops. Nuts 120 on threaded ends 122, 124 of the guide rods 18 are positioned against spring washer assemblies 126 bearing against the outer faces of the side plates, 8,10 whilst spacers 128 respectively in
REFERENCES:
patent: 2863344 (1958-12-01), Barnes
patent: 2886992 (1959-05-01), Barnes et al.
patent: 3106013 (1963-10-01), Rozmus
patent: 3259969 (1966-07-01), Tessmann
patent: 3336655 (1967-08-01), Rozmus
patent: 3340596 (1967-09-01), Rozmus
patent: 3621176 (1971-11-01), Valente
patent: 3847323 (1974-11-01), Good et al.
patent: 3853258 (1974-12-01), Louw et al.
patent: 3946928 (1976-03-01), Di Grasso
patent: 4014494 (1977-03-01), Glagolev et al.
Anderson Douglas E.
Hawkes Daniel J.
Webb Leslie J.
BWE Limited
Mah Chuck Y.
Rowan Kurt
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