A pierce nut insertion tool is provided. In another aspect, a pierce nut feeding mechanism has a mechanically independent driver actuator from that of a punch. A further aspect of the present tool employs a member, moveable with a punch, that retains a pierce nut prior to fastening of the nut to a w
A pierce nut insertion tool is provided. In another aspect, a pierce nut feeding mechanism has a mechanically independent driver actuator from that of a punch. A further aspect of the present tool employs a member, moveable with a punch, that retains a pierce nut prior to fastening of the nut to a workpiece. An additional aspect uses a fluid actuated nut feeder including a piston.
대표청구항▼
1. A method of using a pierce nut insertion tool, the method comprising: a) applying fluid pressure to advance a piston toward a punch axis;b) feeding pierce nuts along a nut path, located on an opposite side of the piston from a moveable press platen, in response to the applying step;c) moving the
1. A method of using a pierce nut insertion tool, the method comprising: a) applying fluid pressure to advance a piston toward a punch axis;b) feeding pierce nuts along a nut path, located on an opposite side of the piston from a moveable press platen, in response to the applying step;c) moving the nut path and the piston away from the platen by an actuator to assist in the feeding;d) allowing one of the nuts to be advanced and aligned with the punch axis;e) moving the nut path and the piston toward the platen, after the allowing step;f) creating a hole in a workpiece and clinching at least one of the pierce nuts in to the workpiece by a punch pushing the at least one of the pierce nuts against the workpiece; andg) controlling application of the fluid pressure with a programmable controller, and varying the timing of subsequent moving steps only by a change of input of the programmable controller. 2. The method of claim 1, further comprising controlling advancing actuation of the piston with a fluid valve attached directly to and moveable with a body containing the nut path, the body being moveable relative to the platen. 3. The method of claim 1, further comprising moving the piston entirely inside a body moveable with the nut path, the body being moveable relative to the platen, and a fluid passageway located within the body being coupled to a piston cavity. 4. The method of claim 1, further comprising moving the piston mechanically independently of a base holding the nut setting punch. 5. The method of claim 1, further comprising controlling fluid flow to the nut feeding piston by selective alignment of a shaft spanning between a body holding the piston and a base holding the punch, the body being moveable relative to the base and the base always moving with the platen. 6. The method of claim 1, furthering comprising temporarily holding together the pierce nuts in a linear string for simultaneous feeding toward the punch axis, and severing the one of the pierce nuts to be inserted by the punch from the string of the pierce nuts. 7. The method of claim 1, further comprising sensing when one of the pierce nuts is present in a position aligned with the punch axis with a sensor electrically connected to the programmable controller and the programmable controller controlling the application of the fluid pressure. 8. The method of claim 1, further comprising: securing a base to the press platen;fixing the punch to the base; andadvancing a plunger of the punch only when the press platen is lowered toward a die. 9. A method of using a pierce nut insertion tool, the method comprising: a) applying fluid pressure to advance a piston in a first direction toward a punch axis;b) moving a pierce nut-feeder in a first direction in response to the applying step;c) advancing a pierce nut-insertion punch in a second direction substantially perpendicular to the first direction; andd) varying the timing of subsequent feeder movement relative to subsequent punch advancing only by a change of input in a programmable controller. 10. The method of claim 9, further comprising: moving a tool body away from a tool base, the nut-feeding piston being at least partially located within the tool body and the punch being stationarily mounted to the tool base; andapplying fluid pressure to move the tool body relative to the tool base in at least one operating condition. 11. The method of claim 10, further comprising advancing a piston which moves the tool body relative to the tool base along a centerline piston axis which is substantially perpendicular to the first direction, the centerline piston axis intersecting the first direction between a head of the nut-feeding piston and the punch axis in all operating conditions, and pneumatically powering all of the pistons. 12. The method of claim 9, further comprising moving a press platen, to which the punch is stationarily mounted, in order to advance the punch toward a die mounted to an opposite press platen. 13. The method of claim 12, further comprising piercing and securing an internally threaded pierce nut to a metallic panel located between the punch and the die. 14. The method of claim 9, further comprising manually moving the pierce nut-feeder through moving an extension arm projecting from an end of the piston. 15. The method of claim 9, further comprising moving a fluid valve with a tool body that contains at least part of the feeder and piston. 16. The method of claim 9, further comprising advancing the punch only when a press plate to which the punch is mounted is moved toward a die. 17. A method of using a pierce nut insertion tool, the method comprising: a) advancing a string of temporarily attached pierce nuts toward a punch axis by use of a fluid powered pawl;b) moving a tool body at least partially containing the pawl and the pierce nuts away from a tool base to which a punch is mounted to allow alignment of one of the pierce nuts with the punch;c) moving the tool body toward the tool base to sever the one of the pierce nuts from the string of temporarily attached pierce nuts;d) using fluid actuation to move the tool body relative to the tool base in at least one of the moving step; ande) controlling application of the fluid pressure with a programmable controller, and varying the timing of subsequent moving steps only by changing settings of the programmable controller. 18. The method of claim 17, further comprising: moving a press platen, to which the punch is stationarily mounted, in order to advance the punch inward toward a die mounted to an opposite press platen, each of the pierce nuts including a substantially rectangular periphery and an internally threaded hole within which the pawl contacts; androtating the pawl relative to a fluid powered piston. 19. The method of claim 17, further comprising selectively supplying pneumatic pressure to a piston entirely moveable with the tool body through a valve also entirely moveable with the tool body. 20. The method of claim 17, further comprising: moving a press platen to which is mounted the punch, relative to an opposite press platen to which is mounted a die; andpiercing and securing the one of the pierce nuts to a metallic panel located between the punch and the die, the die including a cylindrical peripheral surface and more than one inner through-passageways. 21. The method of claim 17, further comprising sensing when the one of the pierce nuts is present in a position aligned with the punch axis using a sensor electrically connected to the programmable controller, and the programmable controller controlling application of the fluid pressure. 22. The method of claim 17, further comprising: advancing a first piston parallel to a feeding direction of the string when the string is inside the tool body, the first piston driving the pawl in at least one operating condition; andadvancing a second piston parallel to the punch axis to drive the tool body relative to the tool base in at least one operating condition.
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이 특허에 인용된 특허 (62)
Shinjo Hiroshi (Osaka JPX), Apparatus for attaching self-piercing nuts to a panel.
Sickels David W. ; Luckhardt Wolfgang,DEX ; Luckhardt ; deceased Heinrich,DEX ITX by Wolfgang Luckhardt ; Christoph Luckhardt ; legal representatives, Fastener retaining device for assembly parts.
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