US424975A - Bolt-heading machine - Google Patents

Description

(No Model.)

S. P. GREEN. BOLT HEADING MACHINE.

N0.4Z4,97 5. Patented Apr. 8 1890.

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UNITED STATES PATENT FFICE.

SAMUEL F. GREEN, OF EST SOMERS, NENV YORK.

BOLT-HEADING MACHINE.

SPECIFICATION forming part of Letters Patent .No. 424,975, dated April 8, 1890.

Application filed February 14:, 1888.

.To all whom it may concern.-

Be it known that I, SAMUEL F. GREEN, a citizen of the United States, residing at WVest Somers, county of Vestchester, and State of New York, have invented new and useful Improvements in Bolt- Heading Machines, of which the following is a specification.

My invention relates to machines for making flat, round, and angular heads on bolts, screws, and rivets, and has for its objects the reduction of the number of handlings and other operations in the common processes and the simplifying of the process of heading. I attain these objects by means set forth in the annexed specification, of which the accompanying drawings form a part.

Figure I represents an elevation of the machine. Fig. II is a plan view; and Figs. III,IV, and V are details of the central features of the machine.

By reference to Fig. I it will be seen that a heavy bed-frame 1, resting upon legs 2 2, contains and supports all the parts of the machine. The driving pulley is upon the side of the machine opposite to the observer on the same shaft that bears the large pulley 3". Upon the right-hand end of the bed 1 are a pair of grooved feed-rollers 17 17,the duty of which is to feed into. the machine the bar from which the bolts are to be made.

6 represents a revolving anvil having trunnions resting in the bearings 5, and which at opposite ends is provided with dies 14 let, which receive and hold the iron that is to form the bolt. The iron is fed into the die 14 on the right-hand side, where it iscut off by the shear 15. 'The anvil 6 then makes a half-revolution, carrying the piece of iron over to the left side, as at 14:, when the hammer-head 16 is driven against it with great force. A die 16 in the end of the slide 16" has a conccvity the shape of the bolthead to be formed, the iron being spread out with in the concavity by the operation of the hammering. As the anvil makes another halfrevolution the completed bolt is forced from the die and drops under the machine to the floor. The anvil receives an intermittent motion through the sector- wheels 8 and 5. The hammer head 16" derives its motion through the connecting-rod 30 and an eccen- Serial No. 264,047. (No model.)

trio 31 on shaft 4, said shaft being revolved only at the proper time for the operation of heading, in a manner to be described, through the belt 8 and pulley 3".

ith this glance at the general operation of the machine, reference will now be had to Fig. II. The manner of hanging the anvil (3 is here clearly shown. Its trunnions rest in bearings 5 5. To one trunnion is secured the sector-wheel 5, which is operated by a similar wheel 8 on shaft 8. This shaft is supported on bearings attached to the under side of the bed 1. Said shaft extends across the bed, and on its opposite end a gear-wheel 7 meshes into a pinion 7, which is keyed to the niain-driving-shaft 7, which also carries the driving-pulley 3.

By now referring to Figs. III. IV, and V the construction and operation of the anvil 6 will be made plain. It will be observed that the anvil is pierced vertically through the center with a square hole 11 and centrally through the trunnions with a bearing for the spindle '12, the spindle carrying a cam 11. The trunnion is also longitudinally pierced, as shown by Figs. III and IV. The bore is adapted, first, to receive plunger 12, whose large end is in contact with the cam 11. This plunger fits snugly, but is easily movable. The outer end of the bore is enlarged and adapted to receive a die 14., which is entered from within by the small end 12 of the plunger 12. This die is also removable from the anvil, being interchangeable with others for different sizes of bolts. For alonger bolt than that represented at 17 a plunger with a shorter small end 12 would be inserted. \Vith a shorter bolt a longer plunger would be used, the plunger being adapted to the length of the bolt. So if a larger or'smaller diameter of bolt were to be made the die and plunger would correspond with it in diameters. The design is that the die shall snugly receive the bolt iron, and sometimes it may be desirable to aid in removing the completed bolt to have the die slightly tapering from the bottom outwardly. The bolt iron is fed into the dies. at a proper heat for the heading operation.

The spindle 12,'through the trunnions of the anvil, is held stationary by suitable means,

Fig. II representing a plate 13 secured to the end of the spindle and bolted to an edge of the trnmiion-bearing 5. The cam 11, being fast to the spindle, is also held constantly in oncposition. 17, l ig. 1V, represents apiece of red-hot iron of suitable length ready for heading. At the right moment the anvil will. revolve in the direction indicated by the arrow in Fig. III, the plunger 12 being undisturbed by the cam ll. and the iron .17 resting against the plunger 12". The anvil stops when it has made a half-revelution,when the headin operation takes place. The anvil again moving in the direction of the arrow causes the cam 11 to act upon the plunger l2 l2, forcing the formed bolt 17 partly from its seat in the die 1:c far enough to admit of its being grasped and withdrawn therefrom.

During the operation of cutting off the boltiron and heading the bolt it is of course necessary to prevent any movement of the anvil. This is accomplished through the lever 10 10", as shown in Figs. II and V. A cam 10, Fig. II, carried on the shaft 6, actuates the lever. The lever is pivoted on the shaft ti, which extends across the under side of the machine. The lever partakes of the bellcrank shape, and carries, preferably, a friction-roller in contact with. the cam 10, and on its upper end has a projection 44, which ongages in a notch 45 in the trunnion of the anvil. At proper intervals the cam releases the lever from the slots 4.5, admitting of the revolution of the anvil. Of course there is nothing new in this device.

The means employed for cutting oil? the bolt-iron or bolt ends are shown in Fig. I and in enlarged detail by Fi 'V.

27 represents a slide operating in the frame 26, Figs. I and II, the frame :36 being secured to the inside of the main frame of the machine. The slide 27 is provided at its lower end, preferably, with a friction-roller lb, and is operated intern'iittently by the cam 51, carried on shaft 8. The upper end of the slide projects into an arm carryinga shearing-die 15.

Between the feed-rollers l7 and the blade 15 a guide 41. is provided, through which the bolt-rod 17 is fed. The outer side of the guide contains the die 4:0, with an opening suitable for the passage and the cuttin oil. of the bolt rod. Atthe proper moment cam 0 on the shaft 8, through the lever 9, causes the raising of the slide 27 and the consequent cutting off of the bolt end by the shear l 5, as shown in Fig. Y.

Now, in revolving the anvil o, as it is a 1 heav 7 mass and must be moved b t the teeth in the wheels 8 and 5, it is plain that the first. impinging of the teeth must be like a hammer-blow to them, and they would be liable to be broken. To overcome this liability it will be observed in Fig. V that as the shear 15 begins to cut the red 17' the arm 27 of the slide 27 strikes the end of the anvil, and the upward movement of the arm, both in time and speed, being in unison with that of the meeting of the sectors 8 and 5, aids the wheels in starting the anvil in. its revolut ions and relieves the wheels at their point of greatest strain.

For actuating the rollers 17 for feeding the heated iron into the machine the shaft carrying one of the rollers is extended, as shown in Fig. II, so as to carry the ratehet-wheellfl, which is operated. intermittently through the lever :31 and connecting-rod 23, the latter being driven by the wheel 7, 24 represcntii'lg a wrist-pin in the wheel, and 22 a wrist-pin in the lever 21. A pawl 20, carried on the upper end of the lever 21, acts upon the teeth in the ratchet 19. The length of feed of the rod may be varied by changing the size of the ratchet-wheel or by having the wrist-pin 22 adjustable on the lever 21, when, by varyin g its position between the shaft and the end of the lever, of course the movement of the ratchet 20 would be varied. These devices are by no means new.

The hammer-head i6 is operated by the connectingrod 30, Fig. II, which is connected to a cam 31 on shaft 1. The balance-wheel 4', which has the pulley I secured to it, is driven continuously. Upon the shaft 4 a friction or other clutch 1: may be affixed by means of a feather to operate the balancewheel.

In Fig. II, I. represent a form of frictionwheel upon which I make no claims. (I. represents a clutch grooved to receive the bifur cated end a of the lever Independent segments (1 lie within the rim of the balanccwheel, and are connected with the clutch by the rods I). By throwing the cl utch c away from the bearing 1-" the effect through the arms Z) is to force the segments cl out against the balancenvhcel rim when the motion of the balance-wheel is imparted to the shaft. The clutclrlever 32 is pivoted in the main frame at 33, Fig. II, and is operated by a cam on shaft 7".

In the construction of this machine I do not wish to be restricted to the specific forms of the various parts so long as the principles of my invention are embodied.

Having described my invention, what I claim, and desire to secure by Letters latout, is--* 1. The combination, in a bolt-heading machine, of a frame 11., supporting a main shaft 7", a balance-wheel shaft 4t, provided with the d riving-pulley 4c, balance-wheel 4/, frictionclutch c u t), operated by lever 32 and cam on shaft 7, and cam 31, a hammer-head operated by the cam 31 through the connecting-rod St a revolving anvil 0, supported in bearings 5 5, and operated intermittently through the sector-wheels 5 8 and wheel 7 on the shaft 8 and pinion 7 on. the main shaft 7, a lever 10, actuated. by cam 10 to hold the anvil. stationary while the sectorwheels are disengaged, bolt-rod'feeding rollers 17, actuated by wheel 7 through the connecting-rod 22}, wrist-pin 22, lever 21, pawl 20,

and ratchet-wheel 19, and a cutting-off shear 15, attached to slide 27, said slide actuated by 1ever 9 and cam 9, all substantially as shown and described.

2. In combination with the revolving anvil, as described, having notches 45 in one of its trunnions sides, the lever 10' 10", pivoted on shaft 42 and operated by a cam 10 on shaft 8, substantially as described.

3. In combination with the revolving anvil and rod-shearing-slide 27, substantially as described, the projection 27on the arm 27, adapted to strike the end of the anvil, substantially as and for the object described.

4. In combination with an elongated revolving anvil, as described, the sector-wheel 5, secured to one of the trunnions oi the anvil,- sector-Whcel S and wheel '7' on shaft 8 pinband-Wheel 4, balance-Wheel 4', with friction and clutch mechanism operatedthrough lever 32 and cam 85, substantially as described, and cam 31, operating the headingslide 16 through the connecting-rod 30, all substantially as shown and described.

SAMUEL F. GREEN.

WVitnesses:

WILLIAM A. HUNT, SAMUEL G. FROST.

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