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1.发明公开
公开(公告)号：EP1977020A1
公开(公告)日：2008-10-08
申请号：EP07704071.5
申请日：2007-01-23
申请人： SMS Elotherm GmbH
CPC分类号： C21D1/10 , Y02P10/253
摘要： According to the invention, a workpiece which describes a closed curve is brought to hardening temperature in sections by means of inductive heating and the workpiece sections which are being heated in this way are subsequently quenched. The inductive heating is carried out using at least two inductors (10,11) which at the beginning of processing are together applied to the workpiece W at closely adjacent starting positions which bound a starting zone Zs. This starting zone Zs is heated to the hardening temperature by direct or indirect action of the electromagnetic field of at least one of the inductors (10,11). The inductors (10,11) are subsequently moved from their starting positions in opposed directions along the workpiece. The opposite movement of the inductors (10,11) is continued until the inductors (10,11) have reached an end position E1,E2 in which their further movement is hindered by the other nearest neighbour inductor (10,11) in the end position E1,E2. The remaining end zone ZE between the inductors (10,11) located in the end position E1,E2 is finally heated to the hardening temperature by direct action of the electromagnetic field of at least one of the inductors (10,11) by the inductors (10,11) being moved together over the end zone ZE in a direction opposite to the direction of movement of one of the inductors (10,11).
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2.发明授权
公开(公告)号：EP1977020B1
公开(公告)日：2013-12-25
申请号：EP07704071.5
申请日：2007-01-23
申请人： SMS Elotherm GmbH
CPC分类号： C21D1/10 , Y02P10/253
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公开(公告)号：EP1060276B1
公开(公告)日：2004-12-15
申请号：EP99907585.6
申请日：1999-03-02
申请人： SMS Elotherm GmbH
CPC分类号： C21D1/10 , C21D9/30 , Y02P10/253
摘要： The invention relates to a device for hardening cylindrical bearing points (L) of a shaft (K) in which at least one of the transition radii (R1, R2) is configured as an indentation in the adjacent shaft parts (W1, W2). The inventive device has a pair of inductively working heating units (1, 2) which are each formed out of at least one inductor (3, 4) and which are connected to a power supply (5, 6). Said inductor comprises two interspaced heat conductor branches (20, 22; 21, 23) each running in a circumferential direction (U) of the bearing point (L). An outer heat conductor branch (20) of the inductor (4) of the first heating unit (2) is assigned to the first transition radius (R1), and an outer heat conductor branch (21) of the inductor (3) of the other heating unit (1) is assigned to the second transition radius (R2). Each of the inner heat conductor branches (22, 23) of the inductors (3, 4) are arranged next to one another by means of an adjusting device (11, 12). The adjusting device is provided for simultaneously advancing the inductors (3, 4) in the radial direction (R) onto the bearing point (L) which is to be hardened until the inductors (3, 4) rest on said bearing point (L). In this state, the heat conductor branches (20-23) at least partially encompass the bearing point (L). When viewed in a circumferential direction (U), the inner heat conductor branches (22, 23) of both inductors (3, 4) overlap without touching in an overlapping area (B). A second adjusting device (13, 14) is provided for moving at least the inductor (3, 4) after it is placed on the bearing point (L), said inductor being assigned to the indented transition radius (R1, R2). The inductor is moved via a movement (A) which is axially parallel to the longitudinal axis (X) of the shaft (K). The inductor is moved in the direction of the indented transition radius (R1, R2) until the outer heat conductor branch (20) of said inductor is inserted into the respective transition radius (R1, R2).
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