US403072A

US403072A - Machine

Info

Publication number: US403072A
Authority: US
Publication date: 1889-05-07
Anticipated expiration: 1906-05-07

Description

(No Model.) 5 SheetsS heet 2.

E E QUIMBY SGREW SWAGING MACHINE.

No. 403,072; Patented May 7, 1889.

N. PETERS. "vow-Lithograph. Whhlngiun, DJ.

(No Model.) 5 Shets-Sheet 3.

, E. E. QUIMBY.

SCREW SWAGING MAGHINE.

Patented May '7, 1889..

(No Model.) 5. Sheets-Sh.eet 4.

E. E. QUIMBY. SCREW SWAGING M'AGHINE.

No.403,072. I Patented MayY, 1889.,

(No Model.) I

E. E. QUIMBY; SCREW SWAGING MAGHINE.

N0. 403,072. Patented May '7, 1889.

I I I H .r" I Z] f; It =l f i'li LII i (j f I NT/YIIK l l I 2 Z 2 4:1 V. 1L BL PM" ll ill I l i 5 Sheets-Sheet 5.

wkms%%z MW:

Nv FETEHS. Phohrlhhngnpher. Wnhingtom p. a

UNITED STATES- PATENT OFFICE.

EDWARD E. QUIMBY, OF ORANGE, NEWV JERSEY, ASSIGNOR TO HAYYVARD A. HARVEY, OF SAME PLACE.

SCREW-SWAGING MACHINE.

SPECIFICATION forming part of Letters Patent No. 403,072, dated May 7, 1889.

Application filed February 6, 1889. Serial No. 298,842. (No model.)

To all whom it may concern:

Be it known that I, EDWARD E. QUIMBY, of Orange, New Jersey, have invented certain Improvements in Screw-S waging Machines, of which the following is a specification.

This invention relatesto a scr'ew-swaging machine of the type in which the thread is formed by rolling the blank forward'and backward between the faces of two appropriately-ribbed dies; and its leading characteristic consists in the employment, in combination with a supporting-die, of a reciprocating die having a suflicient number of endwise forward and backward movements or strokes to impress a spiral groove of the desired depth upon the body of the blank rolled between the dies, and then a stroke of longer range for effecting the discharge of the finished screw and the feeding of a blank into the space between the dies.

The invention also embraces a peculiar magn etic feeding device, means for gradually diminishing the space between the faces of the dies during the rolling operation, means for automatically varying at prescribed intervals the length of stroke of the crank which gives motion to the reciprocating die, and also certain features of organization tending to simplify the machine as a whole.

The accompanying drawings of a screwswaging machine, as embodying the invention, are as follows:

Figure 1 is a top view. Fig. 2 is a front elevation, partly in section. Fig. 3 is a longitudinal vertical section taken through the dotted line to as on Fig. 1. Fig. 4. is a rear elevation, partly in section. Fig. 5 is -a transverse vertical section taken through the plane indicated by the dotted line y g on Fig. 1.

Fig. 6 is a transverse vertical section taken through the plane indicated by the dotted line 22 on Fig. 1. Figs. 7 and8are respectively front and end elevations of the crank-head and crank-arm. Fig. 9 is a section of the crank-arm, taken through the plane indicated by the dotted line w w on Fig. 7. Fig. 10 is a top view of the adjustable arm N and a portion of the pitman on, showing in section the adjustin -screw P and a portion of the segmental gear 0.

In the machine represented in the drawings the Various moving parts are mounted upon a horizontal frame, A, supported on standards, A A A A A, adapted to be bolted to abench. The driving-pulley a is affixed to the rear end of the crank-shaft a, the front end of which projects loosely through the hollow hub B of the crank-pin cam B, seated in the journal 0, and has affixed to it the crank-head D. The cam B is made to gain one complete revolution while the crank-shaft is making a prescribed number of complete revolutions by the engagement of the spur-wheel E, fixed to the crank-shaft, with the pinion E, fixed to the counter-shaft e, and the engagement of the spur-wheel E fixed to the counter-shaft e,

with the pinion E fixed to the cam-hub B. For example, if the ratio of the diameter of the spur-wheel E to the pinion E is as four to three, while the spur-wheel E and the pinion E are equal in their diameters, the cam B will turn four times while the crank-shaft turns three times. It will be obvious that by appropriately changing the relative diameters of these spur-wheels and pinions the cam B may be made to rotate at any other desired rate.

Seated in the crank-head D is the radiallysliding crank-arm cl, carrying the crank-pin d, which is a hardened-steel pin held in place by the set-screw D. The rearwardly-proj ect- 8o ing portion of the pin d is, for convenience, made to serve as the cam-pin for engaging the cam-groove b in the face of the cam B, which controls the sliding movement of the crankarm d, and thus governs the length of stroke of the crank.

The pitman F, connected at one end to the crank-pin d, is at its opposite end pivoted to the slide or die-carriage F, carrying the die G, to which is thus imparted reciprocating motion in a plane parallel with the face of the supporting-die H. During two successive turns of the crank the die G is alternately moved to a position in which its face is opposite the face of thedie H, and then to a position in which only a small portion of its face is opposite that of the die I-I, so that a blank which is being operated upon will not be rolled clear of the dies at either end of the stroke; but toward the conclusion of the next turn of the crank the cam-pin d is overtaken by the eccentric portion b'pf the cam-groove I), and the crankarm d is consequently made to slide in its bearings, carrying the crankpin (1 radially outward, so that at the end of the stroke the cam-groove and pin occupy the position in which they are represented in Fig. 2. There is thus produced an elongation of the stroke, during which the finished screw is rolled clear oif the end of the die II, and the die G is drawn back preparatory to the presentation of another blank to be rolled between the dies.

The presentation or feeding of the blank may be effected in any of the well-known methods, and the motion to operate the feeding devices may be derived from the die-can riage F.

The feeding mechanism shown in the drawings consists of the usual inclined parallel ways I l, terminating at their lower extremity in the short horizontal ways, consisting of the stationary bar 1' and the vertically-11in ged bar 1', which if desired, may be made of brass or other non-magnetizable material. A spring, i tends to press the free end of the hinged bar 1" against the stationary bar 2', as shown in Fig. 1.

The blank-delh erer J is an endwise-reciprocating fiat bar, preferably of magneticallypolarized steel, so supported upon the frame of the machine by guiding devices that its path of motion is parallel with the plane of motion of the reciprocating die.

A simple mode of constructing and guiding the deliverer is illustrated in the drawings, in which the deliverer J is represented as affixed to or formed in one piece with the angle-bar J, which is longitudinally slotted, as shown, to admit the vertical screws j and the horizontal screw j, which are inserted in the frame of the machine and which serve to guide the deliverer in its horizontal path of reciprocation.

In the position which it occupies preparatory to the performance of its delivering function the end J 2 of the slide-bar J is nearly flush with the inner surface of the side I of the inclined ways, the slide-bar having been drawn back to that position by the arm K, under the influence of the contracting spiral spring K, attached at one end to the arm K and at its opposite end to the frame of the machine.

The under edge of the slide-bar J is provided with the notch J 3 for admitting the upper end of the arm K and the upper end of the spring K affixed to the arm K.

The object of the spring K is to permit a small range of additional movement of the arm K when the feeding mot-ion of the deliverer has been arrested by the seizure between the dies of the blank, against which the end J 2 of the deliverer bears.

The swinging of the arm K to impart the feeding motion to the deliverer is effected during the first portion of the forward long stroke of the crank by the engagement of the spring-tooth 7c, pivoted to the side of the arm K with the shoulder f on the longitudinally-adjustable arm f, aflixed to the earf projecting downward from and forming a part of the slide or die-carriage F. During the latter portion of the return long stroke of the crank the tooth 7.2, after having at first been depressed by collision with the under edge of the arm f, has sprung upward into the position and relation to the shoulder frepresented in Fig. 2.

It is intended that the feeding motion of the deliverer shall be arrested at the instant when the body of the blank which is being fed has been carried into contact with the adjacent end of the stationary die H and the advancing end of the die G has arrived at a point nearly opposite the adjacent end of the die II, so that the body of the blank is seized by the two dies. To reach the desired point in proper time, the blank, having farther to travel than the advancing end of the die G, must be moved more rapidly than the die G. This is effected by suitably proportioning the difference in radius between the end of the arm K which drives the deliverer and the position upon the arm K of the tooth k which is engaged by the shoulder f of the arm f. The tooth is is tripped out of engagement with the shoulder fat the conclusion of the feeding motion by the collision of its short arm with the adjustable tripper k aflixed to the frame of the machine, and the arm K, being thus released, is pulled back by its spring K, and pulls back the deliverer to the positions in which the parts are represented in Fig. 2.

\Vhile the blank is moved forward toward the die the hinged spring-bar t" of the ways yields, and after the blank has been seized by the dies springs back against the stationary bar 2', as shown in Fig. 2. The blank is then rolled back and forth between the two dies until, during the concluding portion of the third return-stroke, which, as has been explained, is the long stroke, it is rolled clear oif the end of the stationary die II, and drops through a suitable opening in the bed A upon which the die-carriage F slides. In being discharged the finished screw is prevented from being caught in the ways by its collision with the outer side of the hinged bar 1'.

By making the deliverer of hardened steel and magnetizing it the body of the blank will adhere to the end J of the deliverer with sufficient energy to maintain the blank in a perpendicular position during the feeding operation, notwithstanding the friction of the hinged bar t" upon the portion of the body of the blank adjoining the head.

The employment of the magnetic deliverer permits of a very rapid feed motion being used, because the attractive force of the magnet overcomes the momentum which the blank acquires, and insures the stopping of the blank concurrently with the stoppage of the deliverer at the end of the feeding-stroke.

It will be seen that by disengaging the gearing by which motion is transmitted from the crank-shaft to the crank-pin cam the timing of the cam relatively to the crank-arm can be changed, so that the eccentric part b of the cam-groove will overtake the cam-pin at the end of every third forward stroke instead of at the end of every third return-stroke, as represented in the drawings. I By this change and the appropriate reversal in posit-ion of the ways, the deliverer, and its actuating mechanism the finished screw may be discharged from the dies during the elongated concluding portion of the forward stroke and the-next blank fed to the dies during the first portion of the elongated return-stroke.

If it be desired to discharge the finished scre-wfrom one end of the die H, and to feed the next blank tothe other end of the die H,

as has heretofore been practiced, it will only be necessary to prolong the radially-extended portion of the cam-groove b, as indicated by the dotted line in Fig. 2, in which case the die G will be moved a sufficient distance beyond the die H to discharge 'the finished screw at one end, and will continue its-motion in the opposite direction a sufficient distance to permit the next blank to be fed at the opposite end of the die G.

By appropriately changing the gearing the crank-pin cam may be made to gain, for example, one t-urn while the crankshaft is making two turns, in which case the elongated stroke will occur at every alternate revolution of the crank. Two turns of the crank will suffice to effect the rolling of a thread upon a blank of small diameter. In the case of blanks of larger diameter, requiring a larger number of turns to effect the rolling a thread of proper depth, the crank-controlling cam B may be so geared to the crank-shaft as to gain, for example, one turn while the crankshaft is making four turns, so that every fourth turn will produce the long stroke and the blank will be rolled back and forth between the dies four times before being discharged. During the operation of rolling the thread upon the blank the dieH is gradually fed toward the plane of motion of the die G. To this end the die H is mounted upon the laterally-sliding carriage H, the position of which is controlled by the feed-screw h.

The motion for rotating the feed-screw is derived from the scroll-cam L, affixed to the counter-shaft L, which is made'to rotate once while the crank-shaft is rotating three times by the engagement of the pinion Z, affixed to the crank -shaft with the gear-wheel Z, of three times its diameter, affixed to the counter-shaft L. The scroll-cam imparts motion in one direction to the horizontal slide-bar M, which is longitudinally slotted to receive its guide-screws M r M, which are inserted in the frame of the machine. The pitman m pivoted at one end to the slide-bar M, is pivoted at its opposite end to a radially-adjusta ble crank-pin, N, mounted upon the adjustable arm N, which is connected by means of the pivot N to the segmental gear 0, the

teeth of which mesh with the pinion h, af-

of the segmental gear 0.

Two nuts or collars, p p, are pinned to the shank of the adj usting-screw P, one immediately above and the other immediately beneath the slotted portion of the arm N.

By appropriately turning the adjustable screw P the crank-pin N is moved nearer to or farther from the axis of the'segmental gear 0, as may be desired. The adjusting-screw P is supplied with a jam-nut, P, for the purpose of securing it in the position to which it may be adjusted. The radius of the segmental gear 0 is considerably greater than the radius of the pinion h. By varying the position of the crank-pin N relatively to the axis of the segment 0 the motion derived from the scroll-cam L maybe made to impart a greater or less extent of rotation to the pinion h, and hence the extent to which the die H is fed toward the plane of motion of the die G may be accurately regulated with reference to effecting the formation upon the blank of a groove of the desired depth. Concurrently with the discharge of the finished screw the outer end, L of the vertical scroll surface of the cam L clears the adjacent end of the slide-bar M. The retracting-spring Q, at one end connected to the frameof the machine and at the other end connected to the segment 0, then pulls the segment back into the position into which it has been swung by the action of the scroll-cam, and hence moves the pitman and the slide-barM back into the positions in which they are represented in Fig. 1, and thereby withdraws the die H preparatory to a repetition of the die-feeding operation, while the next blank is beingrolled between the dies.

IIO

In the organization illustrated in the drawings the crank-pin cam B is made to rotate faster than the crank-shaft, so that it gains one turn while the crank-shaft is making three turns, and is thereby made to elongate the third stroke of the crank, as has been described. changing the gearing which rotates the cam B as to make the cam B lose one revolution while the crank-shaft is making three revolutions, in which case the crank-pin d will overtake and be thrown radially outward by the eccentric portion 6 of the cam-groove b at the same stage of every third revolution.

It will therefore be perceived that whatever maybe the number of strokes required to impress upon the blank a groove of the die sired depth it will only be necessary to so time the movements of the cam B as to have The same result is attainable by so it either gain or lose one complete revolution while the crank-shaft is making any prescribed number of complete revolutions.

\Vhat is claimed as the invention is- 1. In a screw-swaging machine of the type in which the thread upon the shank of the blank is formed by the rolling of the blank to and fro between the suitably-ribbed opposing faces of two dies, the combination, as herein set forth, of a supporting-die and an endwise-reciprocating die, and means for imparting to the reciprocating die a prescribed number of relatively short strokes for rolling the blank forward and backward along the face of the supporting-die, and then a longer stroke for efiecting the discharge of the finished screw preparatory to the delivery of another blank to the operation of the dies.

2. The combination, as herein set forth, of a supporting die, an endwise 1noving die mounted upon a reciprocating carrier, a m ovable crank-arm, a pitman connecting said carrier with a crank-pin inserted in said movable crank-arm, and a cam for varying at prescribed intervals the distance of said crankpin from the axis of the crank-shaft and correspondingly varying the movement of said reciprocating carrier.

3. The combination, as herein set forth, of the supporting-die H, the endwise-moving die G, the reciprocating-die carriage F, the pitman F, the radially-movable crank-pin (Z, the crank-pin cam B, loosely mounted upon the crank-shaft a, and suitable gearing for rotating said cam at a speed varyingin prescribed degree from the speed of rotation of said crank-shaft.

at. The combination, as herein set forth, of a supporting-die, an endwise -reciprocating die, means for producing an elongated stroke of said reciprocating die at prescribed intervals and thereby discharging the finished screw, and a deliverer for delivering a blank to the dies during the first portion of the next following return-stroke of said reciprocating die, whereby the blank is fed to the same end of the supporting-die as thatfrom which the finished screw was discharged.

5. The combination, as herein set forth, of the slide-bar or deliverer J, with the shouldered arm f, connected to the reciprocatingdie carriage F, the pivoted arm K, the springtooth 70, mounted upon the arm K, the tripper 70 and the spring'K, for the purpose of eifecting the operation of the deliverer by motion derived from the die-carriage F.

6. The combination, as herein set forth, of the dies G and H, the ways composed of the stationary bar 7: and the hinged bar i, the deliverer J, and means, substantially as described, for imparting prescribed endwise movements to the die G and to the deliverer J, respectively.

7. The combination, as herein set forth, of a reciprocating die and a supporting-die, and appropriately arranged Ways for guiding blanks suspended in said ways, with a magnetic deliverer for delivering blanks successively from said ways to said dies.

8. The combination, as herein set forth, of: the laterally-sliding die-carriage H, the feedscrew h, the pinion h, the segmental gear 0, the radially-adjustable crank-pin N, the pitman on, and slide-bar M, with the cam L and retracting-spring Q.

ED? E. QUI'MB'Y.

\Vitnesses:

D. W. GARDNER, A. M. J ONES.