PRESS-FIT JOINING APPARATUS

摘要

The present invention provides a press-fit joining apparatus 100 where two collet-chuck-type electrodes (first collet-chuck-type electrode 160 and second collet-chuck-type electrode 170) are held using a die set structural body 130 and a sub platen structural body 140. According to the press-fit joining apparatus 100 of the present invention, it is possible to manufacture a product which is required to have higher coaxiality and higher joining strength than conventional products (for example, products such as a drive force transmitting part, the manufacture of which requires the supply of a large and uniform electric current to a joining portion).

主权项

1. A press-fit joining apparatus where an electric current is supplied between a first member having a hole portion and a second member having a shaft body portion with a predetermined press-fitting margin between the shaft body portion and the hole portion of the first member while pressing the shaft body portion of the second member to the hole portion of the first member with a predetermined pressure thus generating electric resistance heat in a joining portion between the first member and the second member so that the shaft body portion of the second member is press-fitted into the hole portion of the first member whereby the hole portion of the first member and the shaft body portion of the second member are joined to each other by solid-phase diffusion joining, the press-fit joining apparatus comprising:
a housing; a power source device; a pressing device; a lower platen fixed to the housing and connected to one electrode of the power source device; an upper platen connected to the other electrode of the power source device and capable of being pressed down toward the lower platen by the pressing device; a die set structural body including: a shaft receiving plate fixed to the lower platen; a plurality of slide shafts mounted on the shaft receiving plate in a raised manner; and a shaft fixing plate fixed by the plurality of slide shafts and having a hole at a center portion thereof; a sub platen structural body including: a plurality of bearing mechanisms which are respectively pivotally supported on the plurality of slide shafts and a sub platen fixed to the bearing mechanism and being mounted on the plurality of slide shafts by way of the bearing mechanisms in a vertically movable manner with respect to the plurality of slide shafts, and capable of being pressed down toward the lower platen by the pressing device by way of the upper platen and the spacer arranged between the upper platen and the sub platen; an elastic mechanism for returning a height position of the sub platen structural body pressed down by the pressing device to an original position; a first collet-chuck-type electrode mounted on the shaft receiving plate, and having three or more slits formed therein; and a second collet-chuck-type electrode mounted on the sub platen, and having three or more slits formed therein.