US3107806A

US3107806A - Modified nose assembly

Info

Publication number: US3107806A
Application number: US143208A
Authority: US
Inventors: George J Van Hecke; Robert A Smoot
Original assignee: Huck Manufacturing Co
Current assignee: Huck Manufacturing Co
Priority date: 1961-10-05
Filing date: 1961-10-05
Publication date: 1963-10-22
Anticipated expiration: 1980-10-22

Description

1963 G. J. VAN HECKE ETAL 3,

MODIFIED NOSE ASSEMBLY Filed Oct. 5, 1961 4; 7/ 5 A 'f l 7 1; 2:1 r? ,1 41; m

, {a /M" i i1 14 1' 4d Z3 1 INVENTORS 1 .3. Gear e J7 1 472 f/eal'a/ United States Patent 3,167,806 MQDEED N (ESE ASSEMEBLY George J. Van Hecke, Detroit, and Robert A. Smoot, Dear-horn, Micln, assignors to Huck Manufacturing Company, Detroit, Mich, a corporation of Michigan Filed Oct. 5, 1961, Sier. No. 143,208 4 Claims. (Cl. 213-42) This invention relates to apparatus for setting a fastener.

More specifically, this invention pertains to apparatus for setting a fastener of the type comprising a pin having a plurality of locking grooves located thereon and a collar or sleeve which is to be swaged onto the pin with material flowing into the locking grooves. At times, difiiculty has been encountered in attempting to remove the anvil used to swage the collar from the swaged collar; there fore it is an object of this invention to provide apparatus for setting a rivet of the above described type having means for ejecting the anvil from the swaged collar of the fastener.

In apparatus for setting fasteners of the above described type, a nose assembly is used which houses the anvil member and also the means for gripping the pin of the fastener. In practice, the nose assembly of the apparatus is moved by the operator to accept a new fastener without regard as to the position of the internal means (to be described) which grip the pin of the fastener. With apparatus as presently constructed, the pin of the fas tener is sometimes inserted into the nose assembly of the apparatus at an angle relative to the anvil member and the means for gripping the pin, such that as the means for gripping the pin moves axially to accept the new fastener the angled pin is jammed in the nose assembly thereby causing damage to the apparatus. Therefore, it is another object of this invention to provide a novel construction for apparatus for setting fasteners of the above described type in which damage to the apparatus by the insertion of the pin of the fastener angularly within the nose assembly of the apparatus is made completely impossible.

Other objects, features, and advantages of the present invention will become apparent from the subsequent description and the appended claims, taken in conjunction with the accompanying drawings, in which:

FIGURE 1 is an enlarged longitudinal sectional view of a nose assembly embodying the features of this invention;

FIGURE 2 is a sectional view of a part of the nose assembly of FIGURE 1 shown in relation to a fastener to be set; and

FIGURE 3 is a sectional view similar to that of FIG- URE 2 in which the setting of the fastener has been partially completed.

Looking now to FIGURE 1, a pull gun assembly generally indicated by the numeral comprises a pull gun member 11 partially shown in phantom lines, which is operable with a nose assembly 12 for setting a fastener 14 (FIGURE 2) disposed in aligned bores in a pair of

workpieces

16 and 18. The pull gun member 11 is of a conventional type capable of applying a relative axial force such as described in the patent to L. C. Huck, No. 2,132,112.

The nose assembly 12 comprises a generally tubularly shaped external or outer anvil member 20 having an axially extending bore 21 and having radially extending ears or lugs 22 located near one end for lockable engagement with the end of the casing of the gun member 11 by means known to the art. The end of the outer anvil 20 secured to the gun member 11 is open while the opposite or forward end is substantially closed by an "Ice anvil portion 24 having a centrally disposed bore or aperture 26 located therein. The aperture 26 can have a variety of shapes to facilitate swaging and can be constructed of a shape well known in the art. A generally tubular sleeve or stop member 25 is matably disposed within the bore 21 at the rear or open end of the outer anvil member 20. Note that the tubular stop member 25 is restrained from further axial rearward movement by the casing of the pull gain 11. Disposed within the outer anvil 24 at the forward portion of the bore 21 is a generally tubularly shaped collar ejector member 28. The collar ejector member 28 is slidable axially within the bore 21 and has an open end adjacent to and abutable with the stop member 25 and has its opposite or forward end substantially closed and terminating in an axially outwardly extending tubular ejector nose portion 30. The ejector nose portion 30 has an outside diameter in clearance relationship with the diameter of the rear portion of the bore 26 such that the nose portion 30 is movable axially therein. The nose portion 30 also has a centrally disposed bore 32 extending therethrough. When the collar ejector member 28 is moved axially to its forwardmost position in the bore 21, the nose portion 30 extends completely within the bore 26 and a forward face 34 of the collar ejector member 23 is engaged with a rear surface 36 of the front portion 24 of the outer anvil member 20. A lost motion gap or axial space 33 is provided between the stop member 25 and the ejector member 28 and is of a dimension relative to the axial length of the nose portion 30 for a purpose to be described.

Slidably disposed within the collar ejector member 28 and within the stop member 25 is a generally tubularly shaped collet member 40 which has an axial bore 42 extending therethrough which is threaded at an open or rear portion 43. The rear portion 43 of the collet member 49 is threadably engaged with a threaded portion 27 of a piston (not shown) of the pull gun 11 and terminates at its opposite or forward end in an axially outwardly radially inwardly tapered bore 44. The bore 42 is relieved radially outwardly for a portion 47 axially adjacent to the tapered bore 44 for a purpose to be described. A chuck jaw assembly 46 comprises a plurality of individual chuck jaws which define a frusto conically inclined surface which is matable within the tapered bore 44. The individual jaw members of the chuck jaw assembly 46 are urged radially inwardly by means of an O-ring member 50 disposed in an external circumferentially extending slot 52. The individual members of the chuck jaw assembly 46 define an axially extending aperture and each has a plurality of teeth 54 extending radially inwardly into the aperture to serve a purpose to be described.

Bearing axially against the rear surface of the chuck jaw assembly 46 is a generally circularly shaped chuck jaw follower cap and O-ring assembly 56. A generally tubularly shaped chuck jaw follower member 58 has its forward end bearing axially against the O-ring of the follower cap and O-ring assembly 56 and in turn is urged axially forwardly by means of a coil spring member 60 which bears against the opposite or rear end of the chuck jaw follower member 56. The opposite or rear end of the spring 60 bears against an annular flange portion 61 of a generally tubularly shaped chuck jaw follower sleeve member 62 which has a body portion 63 telescopically disposed within the chuck jaw follower member 58. Since the flange portion 61 is in abutment with the threaded portion 27 of the piston member of the pull gun 11, the coil spring member 60 thus urges the chuck jaw follower member 58 axially forwardly into engagement with the chuck jaw follower cap and O-ring assembly 56, which in turn then urges the chuck jaw assembly 46 axially outwardly or forwardly into the tapered bore 44.

Looking now to FIGURE 2, a fastener 14- of the type to be set by the pull gun assembly 16 comprises a tubular sleeve member 64 having a sleeve portion 65 extending through and beyond aligned bores in a pair of plates 16 and 13 and has a collar portion 66 in abutment with the front plate 18. A pin member 67 has a head 68 in engagement with the end of the sleeve portion 65 of the sleeve member 64 and has a shank portion 69 extending through the sleeve member 64 and beyond the collar portion 66. Located axially on the shank portion 69 from the head 68 is a plurality of locking grooves 70 into which the collar portion 66 is swaged in the setting of the fastener 14. Axially adjacent to the locking grooves 79 is a breakneck groove 71 at which the shank 69 of the pin 67 severs upon the attainment of a predetermined axial load. On the end of the shank portion 69 opposite from the head 68 is located a plurality of pull grooves 73.

In setting the fastener 1-1, the nose assembly 12 is moved proximate the fastener 14 and the shank 69 is inserted axially thereon. Note that the shank 69 of the pin 67 will extend through the bore 26 in the forward portion 24 of the outer anvil member 20, through the bore 32 in the nose portion 30 of the collar ejector member 28, into the tapered bore 44 in the collet member 40, and towards the front face of the chuck jaw assembly (FIGURE 2). Upon axial movement of the collet member 40 relative to the fastener 14, the chuck jaw assembly 4-6 engages the shank 69 of the pin 67 causing the chuck jaw assembly 46 to he moved axially rearwardly against the compressive force of the spring member '60, causing the individual jaw members to be moved radially outwardly, permitting the insertion of the shank 6-9 of pin 67 into the aperture therein. Note that the increased diameter or relieved portion 47 allows the jaw members of the chuck jaw assembly 46 to move radially outwardly. As this occurs, the plurality of teeth 54 on the chuck jaw assembly 46 engage the pull grooves 73 on the shank 69.

Upon actuation of the pull gun 11, a relative axial force is applied between the threaded portion 27 of the piston and the casing of the pull gun 1 1 and, hence, between the outer anvil 20 via the ears or lugs 22. As this axial force is increased, the head 68 of the pin 67 upsets the end of the sleeve portion 65, forming thereby a blind or bulbed head 72 (FIGURE 3). With a further increase in axial force, the bore 26 of the outer anvil member 20 is moved over the collar portion 66, thereby swaging the collar portion 66 into the locking grooves 76 which are now axially coincident with the collar portion 66. Upon an increase in the axial force, the swaging is completed and the shank 69 is severed at the breakneck groove 71. The severed portion of the shank 69 is free to move axially rearwardly through the remaining structure of the nose assembly 12 and out through a bore extending through the pull gun 11.

Upon further actuation of the pull gun 11, the piston (not shown) is caused to move axially forwardly, thus moving the collet member 4!) axially forwardly until it engages the forward portion of the collar ejector member 28. This movement continues, moving the nose portion 30 into the bore 26 and into engagement with the now swaged collar portion 66. At this time, a relative axial force is applied between the nose portion 30 and the outer anvil member 20, causing the outer anvil 20 to be removed from the collar portion 66. With the outer anvil member 24} removed from the swaged collar portion 66, the collar ejector member 28 is moved forward only until the front surface 34 of the collar ejector 28 engages the rear surface 36 of the outer anvil member 20. Thus it can be seen that the ejector member 28 serves the function of providing a means whereby the outer anvil member 26 can be released from the swaged collar portion 66.

be possible to insert the shank portion 69 of the pin 67 through the bore 26 at such an angle relative to the bore 44 of the collet member 40 that upon forward movement of the collet member 40 the shank portion 69 would be jammed between the outer anvil member 20 and the collet member 4%, resulting in damage to the nose assembly 12.

Looking again to FIGURE 2, in practice the stroke of the pull gun 11 is such that at the rearward end of the stroke thecollet member 46 would be located axially rearwardly of the position as shown in FIGURE 2. Of course, the position of the nose portion 30- of the collar ejector 28 would remain unchanged, since further axial rearward movement is prevented by the stop member 25. Thus, assuming the absence of the stop member 25 and assuming the ejector nose portion 30 to be anintegral part of the collet member 40, the shank 69 of the pin '67 could still be inserted at an angle relative to the. collet member 49 and the outer anvil member 20, thus resulting in damage to the nose assembly :12. With the construction as shown in FIGURE 2, even with the collet member 40 at its axially rearward extremity, it would be impossible to insert the shank 69 of the pin 67 angularly with respect to the collet member 40 and the outer anvil member 20. The gap 38 is provided of an axial length relative to the length of the nose portion 30 of the collar ejector 28 such that the shank 69 of the pin 67 cannot be inserted between the nose portion 30' and the outer anvil member 20. In other words, then, the nose portion 30 is of such a preselected length relative to the permissible axially rearward movement of the collar ejector member 28 that even with the ejector member 28 in its axially rearwardmost position, the nose portion 30 substantially radially blocks the aperture 26 internally of the front or forward portion 24 to prevent angular insertion of the pin 67. Thus, with the construction of the nose assembly 12, as shown in the drawings, insertion of the pin 67 of the fastener 14 angularly therein cannot occur and, thence, damage to the nose assembly 12 thereby is positively prevented.

Note, then, that in the construction as shown and described, the nose portion 30 of the collar ejector 28acts both as a means to remove the outer anvil member 29 from the swaged collar portion 66 and also serves to guide the shank 69 of the pin '67 into the nose assembly 12,

resultant of looking grooves therein and a tubular member adapted to be fitted over the shank of the pin and swaged into the locking grooves therein, said apparatus comprising a generally tubularly shaped outer anvil member having an aperture through a forward portion thereof for swaging the tubular member to the pin, a generally tubularly shaped collar ejector member axially movably disposed within said outer anvil member and being movable axially rearwardly, said collar ejector member having a tubular portion extending axially outwardly to a position proximate to said forward portion to substantially radially block passage of said pin member between said forward portion and said tubular portion, chuck jaw means disposed within said outer anvil member for grippingly engaging the pin of the fastener and movable axially inde pendently of said collar ejector member, means for applying an axial force relative to said chuck jaw means and said outer anvil member, and means operatively associated with said collar ejector member for limiting the axially rearward movement of said collar ejector member within said outer anvil member to said position.

2. Apparatus for applying a fastener which includes a pin member having a head and .a shank with a plurality of locking grooves therein and a tubular member adapted to be fitted over the shank of the pin and swaged into the locking grooves therein, said apparatus comprising a generally tubularly shaped outer anvil member having an aperture through a forward portion thereof for swaging the tubular member to the pin, a generally tubularly shaped collar ejector member disposed within said outer anvil member and movable axially therein to a forward position and a rear position, said collar ejector member having a tubular portion extending axially into said aperture in said outer anvil member for engagement with the tubular member in accordance with movement of said collar ejector member to said forward position, said tubular portion extending axially outwardly to a position proximate to said forward portion to substantially radially block passage of said pin member between said forward portion and said tubular portion with said collar ejector member in said rear position, chuck jaw means axially movably disposed within said outer anvil memher for grippingly engaging the pin of the fastener and being engageable with said collar ejector member for moving said collar ejector member toward said forward position responsively to axially forward movement of said chuck jaw means, means for applying an axial force relative to said chuck jaw means and said outer anvil member, and means operatively associated with said collar ejector member for limiting the axially rearward movement of said collar ejector member within said outer anvil member to said rear position.

3. Apparatus for applying a fastener which includes a pin member having a head and a shank with a plurality of locking grooves therein and a tubular member adapted to be fitted over the shank of the pin and swaged into the locking grooves therein, said apparatus comprising a generally tubularly shaped outer anvil member having an aperture of a preselected shape through a forward portion thereof for swaging the tubular member to the pin, a generally tubularly shaped collar ejector member disposed within said outer anvil member and movable axially therein to a forward position and a rear position, said collar ejector member having a tubular portion extending axially into said aperture in said outer anvil member for engagement with the tubular member in accordance with movement of said collar ejector member to said forward position, said tubular portion extending axially outwardly to a position proximate to said forward portion to substanti ally radially block passage of said pin member between said forward portion and said tubular portion with said collar ejector member in said rear position, chuck jaw means axially movably disposed Within said outer anvil member for grippingly engaging the pin of the fas tener and being engageable with said collar ejector member for moving said collar ejector member toward said forward position responsively to axially forward movement of said chuck jaw means, means for applying an axially rearward force relative to said chuck jaw means and said outer anvil member for setting the fastener and for moving said aperture over the tubular member to sw-age the tubular member to the pin and for applying an axially forward force relative to said chuck jaw means and said outer anvil member for moving said tubular portion of said collar ejector member into engagement with the tubular member for removing the tubular member from said aperture, and a hollow sleeve disposed within said outer anvil member and engageable with said collar ejector member for limiting the axially rearward movement of said collar ejector member within said outer anvil member to said rear position.

4. Apparatus for applying a fastener which includes a pin member having a head and a shank with a plurality of locking grooves therein and a tubular member adapted to be fitted over the shank of the pin and swaged into the locking grooves therein, said apparatus comprising an outer anvil member having a forward portion with an aperture therethrough for swagin-g the tubular member to the pin, a collar ejector member movable axially relative to said outer anvil member to a forward position and a rear position, said collar ejector member having an axially outwardly extending tubular portion movable axially within said aperture in said outer anvil member for engagement with the tubular member, said tubular portion extending axially to a position proximate to said for-ward portion to substantially radially block passage of said pin member between said forward portion and said tubular portion with said collar ejector member in any axial position from said forward position to said rear position, means for applying an axial force relative to the pin of the fastener and said outer anvil member, and a stop member associated with said outer anvil member for limiting the axially rearward movement of said collar ejector member to said rear position.

References Cited in the file of this patent UNITED STATES PATENTS 2,531,049 Huck Nov. 21, 1950

Claims

1. APPARATUS FOR APPLYING A FASTENER WHICH INCLUDES A PIN MEMBER HAVING A HEAD AND A SHANK WITH A PLURALITY OF LOCKING GROOVES THEREIN AND A TUBULAR MEMBER ADAPTED TO BE FITTED OVER THE SHANK OF THE PIN AND SWAGED INTO THE LOCKING GROOVES THEREIN, SAID APARATUS COMPRISING A GENERALLY TUBULARLY SHAPED OUTER ANVIL MEMBER HAVING AN APERTURE THROUGH A FORWARD PORTION THEREOF FOR SWAGING THE TUBULAR MEMBER TO THE PIN, A GENERALLY TUBULARLY SHAPED COLLAR EJECTOR MEMBER AXIALLY MOVABLY DISPOSED WITHIN SAID OUTER ANVIL MEMBER AND BEING MOVABLE AXIALLY REARWARDLY, SAID COLLAR EJECTOR MEMBER HAVING A TUBULAR PORTION EXTENDING AXIALLY OUTWARDLY TO A POSITION PROXIMATE TO SAID FORWARD PORTION OF SUBSTANTIALLY RADIALLY BLOCK PASSAGE OF SAID PIN MEMBER BETWEEN SAID FORWARD PORTION AND SAID TUBULAR PORTION, CHUCK JAW MEANS DISPOSED WITHIN SAID OUTER ANVIL MEMBER FOR GRIPPINGLY ENGAGING THE PIN OF THE FASTENER AND MOVABLE AXIALLY INDEPENDENTLY OF SAID COLLAR EJECTOR MEMBER, MEANS FOR APPLYING AN AXIS FORCE RELATIVE TO SAID CHUCK JAW MEANS AND SAID OUTER ANVIL MEMBER, AND MEANS OPERATIVELY ASSOCIATED WITH SAID COLLAR EJECTOR MEMBER FOR LIMITING THE AXIALLY REARWARD MOVEMENT OF SAID COLLAR EJECTOR MEMBER WITHIN SAID OUTER ANVIL MEMBER TO SAID POSITION.