C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
C21D 1/10 (2006.01) C21D 9/30 (2006.01) H05B 6/02 (2006.01) H05B 6/10 (2006.01) H05B 6/14 (2006.01) H05B 6/40 (2006.01)
Patent
CA 2264818
The invention relates to the rotary and simultaneous electroinductive hardening of the bearing surfaces (2a; 3a) of crank pins (2; 3) of a crankshaft (1) disposed immediately one beside the other and offset in relation to one another in the axial direction (D), having inductors (10; 11) which each engage around the crank pins (2; 3) by a maximum of 180° and which each have two inductor branches (12, 13; 14, 15) arranged in parallel and following the curvature of the bearing surfaces (2a; 3a), of which one branch is associated with the overlapping zone (5) of the crank pins (2; 3), the other branch being associated with the particular other edge zone (2b; 3b) of the crank pin (2; 3) associated therewith, the inductor branches (12, 13; 14, 15) of each inductor (10; 11) having in the axial direction (D) a distance (A) increased in relation to half the total width (B) of the crank pins (2; 3). According to the invention such a device is characterised in that the inductors (10; 11) engage around the crank pins (2; 3) substantially from the same direction (R) and the zone of increased distance (A) of the inductor branches (12, 13; 14, 15) of each inductor (10; 11) is limited to that portion (12c; 14c) of the inductor branch (12; 14) associated with the overlapping zone (5) which does not in any rotary position of the crankshaft (1) penetrate the corresponding portion (14c; 12c) of the inductor branch (14; 12) of the particular other inductor (11; 10) associated with the overlapping zone (5).
La présente invention concerne un dispositif de durcissement tournant et simultané par induction électrique des surfaces d'appui (2a; 3a) de pistons alternatifs (2; 3), directement juxtaposés et orientés dans l'axe (D), d'un arbre de commande (1) pourvu d'inducteurs (10; 11) enveloppant lesdits pistons alternatifs (2, 3) selon un angle de 180 DEG au maximum. Chaque inducteur a au moins deux branches (12, 13; 14, 15) parallèles placées après la courbe des surfaces d'appui (2, 3), l'une des branches étant du côté zone de chevauchement (5) des pistons alternatifs (2b; 3b) et l'autre associée à la zone de bordure (2b; 3b) du piston alternatif correspondant (2, 3), les branches (12, 13; 14, 15) de chaque inducteur (10, 11) dans l'axe (D) étant espacées (A) par un intervalle supérieur à la moitié de la largeur totale (B) des pistons alternatifs (2; 3). Le dispositif selon l'invention est caractérisé en ce que les inducteurs (10; 11) enveloppent les pistons alternatifs (2, 3) en venant sensiblement de la même direction et en ce que la zone où l'espacement (A) entre les branches (12, 13; 14, 15) de chaque inducteur (10; 11) est plus grand se limite à la section (12c; 14c) de la branche d'inducteur (12; 14) côté zone de chevauchement (5) qui ne traverse, dans aucune position tournante de l'arbre de commande (1), la section correspondante (24c; 12c) de la branche d'inducteur associée à la zone de chevauchement (5) de tout autre inducteur (11; 10).
Gezarzick Waldemar
von Starck Axel
Elotherm Gmbh
Kirby Eades Gale Baker
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