Patent application number | Description | Published |
20110079122 | DEVICE AND METHOD FOR MANUFACTURING WORK - This device includes an upper die unit, a lower die unit disposed opposite to the upper die unit. One of the upper die unit and the lower die unit includes a main punch and the other die unit includes an ejector, a slider disposed so as to be movable in a direction crossing with a vertical direction and a biasing portion which is connected to the slider and biases the slider in a predetermined sliding direction S. A cam structure is disposed between the slider and the ejector, which converts a movement of the ejector in a direction opposite to a work ejecting direction E to a movement of the slider in a direction opposite to a predetermined sliding direction when the upper die unit and the lower die unit are closed, and which converts a movement of the slider in a predetermined sliding direction to a movement of the ejector in a work ejecting direction when the upper die unit and the lower die unit are opened by a predetermined amount from the closed state. The device further comprises a position retaining portion which retains a position of the slider moved in a direction opposite to the predetermined sliding direction for a certain period of time. | 04-07-2011 |
20110252938 | PUNCH PRESS DEVICE - A punch press device has a lift that can move up and down with respect to a workpiece and a punch that is supported by the lift and can move up and down with respect to the lift. Further, the punch press device has a switching member that reciprocates between a position where the punch is constrained so that it moves down together with the lift and a position where the punch is released so that it moves up with respect to the lift. The punch press device has two electromagnetic solenoids for reciprocating the switching member. The first electromagnetic solenoid moves the switching member in a first direction, and the second electromagnetic solenoid moves the switching member in a second direction opposite to the first direction. | 10-20-2011 |
20110277939 | STAMPING-LAMINATING APPARATUS AND METHOD - Punching structures each include a die, a punch that cooperates with the die to stamp a workpiece, a die supporting member that applies lateral pressure to core pieces stamped out from the workpiece, and a counter pressure applying mechanism that applies counter pressure toward the punch to the core pieces from the side opposite to the punch. The punching structures also include selecting mechanisms, respectively. The punching structures laminate core pieces while applying lateral pressure and counter pressure to the core pieces. The punching structures are arranged along the conveyance direction of the workpiece. The selecting mechanisms select one of the punching structures to be put in a pause state, so that one of the punching structures is put in a pause state during a stamping operation of the punching structures. | 11-17-2011 |
20120216958 | ROTARY LAMINATION APPARATUS - A rotary lamination apparatus has a rotary lamination turntable rotational about a vertical axis. A plurality of workpieces are rotated and laminated on the turntable. The turntable includes a support member that is arranged on an upper surface of the turntable, a plurality of rolling bodies mounted on the upper surface of the turntable, and a plurality of urging members for urging the rolling bodies upward. The support member is formed of material having a high friction coefficient. The rolling bodies are selectively movable between an upper position and a lower position. In the upper position, at least a portion of each of the rolling bodies is located above the upper surface of the support member. In the lower position, each rolling body is located below the upper surface of the support member. In the upper position, the rolling bodies support the workpieces movably in a lateral direction. | 08-30-2012 |
20120241095 | ROTARY LAMINATION APPARATUS - A rotary lamination apparatus includes a die, a punch, a rotation drive source, a mounting table, at least one proximity sensor, and a determining device. The punch punches core pieces from a thin plate material. The rotation drive source drives and rotates the die about the central axis of the die. The mounting table is arranged in the inner space formed by the die. The core pieces are rotated and laminated on the mounting table. The proximity sensor detects whether the die is in the proximity of a predetermined position in a non-contact manner after the die has stopped rotating. The determining device determines whether the die is stopped at the predetermined position based on a detection result from the proximity sensor. | 09-27-2012 |
20120275740 | ROLLING-ELEMENT BEARING, AND METHOD AND APPARATUS FOR MANUFACTURING ROLLING-ELEMENT BEARING - A rolling-element bearing in which a rolling element is retained in each of retaining openings formed in a retainer and method for manufacturing the bearing are provided. Each retaining opening is defined by a pair of inner side faces facing each other, and a pair of inner end faces facing each other. In the manufacturing method, with a support die being brought into contact with one of the inner side faces and the inner end faces of one of the retaining openings, the outer and inner circumferential surfaces of the retainer are pressed by an outer punch and an inner punch. Accordingly, on at least one of the inner side faces and the inner end faces, a first retaining piece and a second retaining piece for preventing the rolling element from falling off are formed on the outer circumferential surface and the inner circumferential surface of the retainer, respectively. | 11-01-2012 |
20130075029 | METHOD FOR MANUFACTURING CORE OF ROTATING ELECTRICAL MACHINE - A core of a rotating electrical machine is formed by laminating core plates, which are each formed by a plurality of core pieces. According to the method for manufacturing the core, a belt-like workpiece is first conveyed intermittently in its longitudinal direction. Then, while the workpiece is in a stopped state, side edges of a core piece are punched out. At a downstream position in the conveying direction of the workpiece, the remaining edges of the core piece are cut, so that the core piece is punched out. The punched out core pieces are lined up on a support. The core plate is thus formed, and the core pieces are laminated. | 03-28-2013 |
20130134826 | LAMINATE OF METAL PLATES, CORE FOR ROTATING ELECTRICAL MACHINE, AND LAMINATING METHOD FOR LAMINATE OF METAL PLATES - A core is formed by laminating a plurality of core plates. Each of the core plates includes a joint portion for joining the core plates together in the laminated state. Each of the joint portions includes a fixing piece, a passage hole, a receiving portion, and an opening. Each of the fixing pieces is raised in the direction in which the core plates are laminated. Each of the passage holes receives the fixing piece of the corresponding adjacent one of the core plates. | 05-30-2013 |
20140352393 | FORMING DIE APPARATUS AND DIE MEMBER - A forming die apparatus includes a first die on which a die surface is formed and a second die for pressing a workpiece placed on the first die. At least one of the first die and the second die is configured by assembling a plurality of die members. Each die member has a concave side surface facing another die member. | 12-04-2014 |
20140352394 | PRESS DIE - A press die includes die blocks placed on a base and aligned in a frame. A wedge is located between the frame and one of the die blocks. The wedge produces a wedge effect of bringing the die blocks to an aligned and fixed state. A spacer is located between the base and the wedge to set the extent of the wedge effect to a predetermined level. | 12-04-2014 |
20140352395 | PRESS DIE - A press die includes block rows arranged in parallel in a frame. Each block row is formed by die blocks. The block rows include a first block row and a second block row that are adjacent to each other. A joint portion between adjacent two blocks belonging to the first block row faces a side surface of a die block belonging to the second block row. | 12-04-2014 |
20140366378 | METHOD AND APPARATUS FOR MANUFACTURING ROLLING-ELEMENT BEARING - A rolling-element bearing in which a rolling element is retained in each of retaining openings formed in a retainer and method for manufacturing the bearing are provided. Each retaining opening is defined by a pair of inner side faces facing each other, and a pair of inner end faces facing each other. In the manufacturing method, with a support die being brought into contact with one of the inner side faces and the inner end faces of one of the retaining openings, the outer and inner circumferential surfaces of the retainer are pressed by an outer punch and an inner punch. Accordingly, on at least one of the inner side faces and the inner end faces, a first retaining piece and a second retaining piece for preventing the rolling element from falling off are formed on the outer circumferential surface and the inner circumferential surface of the retainer, respectively. | 12-18-2014 |