Metal working – Means to assemble or disassemble – With magazine supply
Patent
1995-07-06
1998-09-29
Bryant, David P.
Metal working
Means to assemble or disassemble
With magazine supply
227119, 227149, B23Q 710
Patent
active
058131140
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
THIS INVENTION relates to improved setting tools for fastening machines and in particular to improvements in the nose assembly of the setting tool whereby fasteners are delivered to a work piece.
BACKGROUND OF THE INVENTION
U.S. Pat. No. 4,615,475 (Fuhrmeister) (=AU-B-28506/84 (566811)=International Publication No. WO84/04710) discloses a feeder for headed fasteners, where the fasteners, mounted in tape, are sequentially advanced into alignment with the punch and die assembly of a fastening machine by an oscillating actuator, which is timed by the plunger holding the punch, the actuator releasably engaging the stems of the fasteners to advance the fasteners.
The feeder, and the fastening machine, has proved commercially successful in a wide range of industries. There are certain applications, however, eg. in the automotive and white goods industries, where the dimensions of the feeding head preclude the use of the above described type of fastening machine to fasten components together, where limited space is available.
In addition, the minimum radius of curvature of the tape entering and leaving the feeder head also limits the reduction of size of the feeder hereinbefore described to suit such applications.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a setting tool with an improved means of supporting the fasteners as they are engaged by the punch in a fastening machine and to be urged thereby into engagement with the work pieces to be fastened.
It is a preferred object of the present invention to provide an improved nose assembly for the fastening machine which enables the fastening machine to be used in confined spaces in conjunction with high clamping loads whenever needed.
It is a still further preferred object to be able to feed and support fasteners which are smaller in length than diameter and need to be guided and/or oriented during the fastening process.
Other preferred objects will become apparent from the following description.
The term "fastener" shall include rivets, screws and other like fastening devices.
The term "fastener actuator" includes a punch when the fastener is a rivet, a driver when the fastener is a screw, that is, the tooling appropriate to insert or apply the fastener after its delivery by the nose assembly.
The term "stem" of a fastener shall be hereinafter used to also include a "shank" of a fastener.
The term "fastener support means" includes means which guide or orient an advancing rivet as occurs in the tape feed machines hereinbelow where initial support is by the tape and the term includes means which engage either or both of the head and stem of an advancing fastener.
The support is not intended to be only a static function but it is also to refer to the dynamic engagement of the means with an advancing fastener.
In a broad aspect, the present invention resides in a setting tool for a fastening machine, which fastening machines includes:
a nose piece with a fastener delivery passage therein and a fastener feed mechanism to advance fasteners to the delivery passage;
a fastener actuator slidably mounted for movement through the delivery passage to move a fastener therefrom to a work piece to be fastened thereby; and
means operable to advance the fastener actuator through the fastener delivery passage to delivery fasteners therefrom at an opening in an end thereto;
the setting tool operable with or without a preclamp function;
characterised in that:
fastener support means is provided at, or on the side wall of, the fastener delivery passage to guide and/or maintain orientation of the fastener whilst the fastener is moved therethrough by the advancing fastener actuator.
Preferably, the frame is a C-type frame with a fastener upsetting die mounted on one jaw and the setting tool mounted on the other jaw and connected to an actuator.
Preferably, the means to advance the punch is a plunger, operated by an hydraulic cylinder.
The fastener supply passage may have its axis perpendicular, or axially inclined, relative
REFERENCES:
patent: 2244048 (1941-06-01), Butter
patent: 2538895 (1951-01-01), Brennan
patent: 2901749 (1959-09-01), Crossen et al.
patent: 3250451 (1966-05-01), Fulop
patent: 4615475 (1986-10-01), Fuhrmeister
patent: 4819856 (1989-04-01), Davern et al.
patent: 5181315 (1993-01-01), Goodsmith
patent: 5398860 (1995-03-01), Edwards
Blacket Stuart Edmund
Fuhrmeister Ralph
Bryant David P.
Henrob Ltd.
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