US558140A - Riveting and pressing machine - Google Patents

Description

(No Model.)

C. B. ALBREE. V RIVHTING AND PRESSING MACHINE. No. 558,140. Patented A15 1. 14, 1896.

WITNESSES INVENTOR Jams/Mg AN DREW H GRAHAM PHOTOLITHRWASHINFI'ON, D.C

' hole.

U ITED STATES PATENT ()FFICE.

CHESTER B. ALBREE, OF ALLEGHENY, PENNSYLVANIA.

Rl-VETING AND PRESSING MACHINE.

SPECIFICATION forming part of Letters Patent no. 558,140, dated April 14, 1896, Application filed January 9, 1896. Serial No. 574,904. (No model.)

To all whom it may concern.-

Be it known that I, CHESTER B. ALBREE, of Allegheny, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Riveting and Pressin Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 shows in side elevation a rivet ing-machine constructed in accordance with my invention. Fig. 2 is afront elevation thereof. Fig. 3 is a horizontal section on the line a: 00 of Fig. 1.

Like symbols indicate like parts in each.

My invention relates to an improvement adapted for use in machines for riveting by pressure or in machines applying pressure for other purposes in such manner that the greatest pressure is exerted at or near the end of the stroke, and although in this specification I describe the invention particularly as applied to riveting-machines I do not in tend to limit myself thereto, but wish to cover its use for any purpose for which it may be adapted.

In the drawings, A represents the frame of the riveting-machine.

B is the riveting-plunger,which moves,vertically, in a suitable guide or hub O in the frame, and D E are the rivetingdies, the moving die D being fixed to the plunger and the stationary die E being fixed to the frame.

The motor by which the plunger is actuated is a cylinder N, having a reciprocating piston and apiston-rod M, operated by steam,

compressed air, or water, or any other type of motor, such as an electric motor, or even hand-levers, for giving longitudinal motion to the piston or other rod M may be employed.

N is a valve governed by a hand-lever N by means of which the operation of the motor maybe controlled. Power is transmitted from the motor to the dieplunger through a lever or bar F, pivoted at one end at G to the machine-frame and at the other end pivoted to the upper end of the plunger B by means of a pin H, fitting in a somewhat elongated At the end of the piston-rod M there is preferably an antifriction-roller L, which rides upon the upper side of the lever F, and as this lever is inclined relatively to the path ger B and moving the die D toward its companion die E. To hold the roller L in contact with the lever during such motion of the piston-rod and to take up the strain of the work, I employ a swinging arm K, pivoted at one end to the piston-rod at the axis of the roller L and pivoted at the other end at J to bars or posts I I, which extend from the frame A and in effect constitute part of the frame. By reason of the use of said swinging arm when the piston-rod is projected the roller at its end moves in the arc of a circle, (shownby dottted lines,) and the lat eral thrust thereon is taken up by the swinging arm and post. 7

O is a lifting-bar connecting the arm K at a point P to the lever F at a point Q. This lifting-baris divided and fitted with a spring 19, so as to have some loose motion, the purpose being that when the piston-rod is retracted the retraction of the swinging arm K, acting through the rod 0, will lift the lever F. v The operation of the machine is as follows: The work to be riveted is interposed between the dies D E, and the parts being in the position shown by full lines in Fig. 1 the cylinderN is operated so as to projectthe pistonrod M, and the roller L, moving along the surface of the lever F, will force it down, thus moving the plunger B within its guide and pressing the moving die upon the rivet with great pressure. The dotted lines in the drawings and the reference-figures designated by the prime mark show the parts in the positions which they occupy at the end of the stroke.

The action of the inclined lever F with the end of the piston-rod rolling or sliding in contact therewith is such that the speed of motion of the plunger decreases as the plunger advances, and that the slowest motion and the greatest pressure is exerted upon the work at the end of the stroke when the rivet is being finally upset and shaped and when the greatest pressure is needed. 011 the return stroke of the piston the lever F is lifted by means of the lifting-rod O, and the parts are thus restored to the positions shown in the drawings; but, although the lifting-rod is a convenient device for this purpose, it is not essential, for the same work can be performed by a spring, Weight, or other counterbalance acting upon the lever.

The advantages of my invention are many and will be apparent to those skilled in the art.

The apparatus which I have described is simple in construction, compact, durable, and easy to maintain in working order, and it affords means for riveting in the most effective manner, giving the greatest pressure at the time when it is most needed and distributing the strains of work upon the proper parts of the machine.

I claim 1. A machine for pressing or riveting, comprising a plunger which carries the moving die or tool, mechanism such as a cylinder having a reciprocating part adapted to impart motion to the plunger, a lever connected with the plunger and inclined to the path of motion of said reciprocating part and in sliding contact therewith, and a swinging arm pivotally connected to the frame of the machine and connected also with said reciprocating part for holding the latter to its working contact with the lever, substantially as described.

2. A machine for pressing or riveting comprising a plunger which carries the moving die or tool, mechanism such as a cylinder having a reciprocating part adapted to impart motion to the plunger, a lever connected with the plunger and inclined to the path of mo tion of said reciprocating part and in sliding contact therewith, a swinging arm pivotally connected to the frame of the machine and connected also with said reciprocating part for holding the latter to its working contact with the lever, and a roller bearing between said reciprocating part and the lever, substantially as described.

3. A machine for pressing or riveting comprising a plunger which carries the moving die or tool, mechanism such as a cylinder having a reciprocating part adapted to impart motion to the plunger, a lever connected with the plunger and inclined to the path of motion of said reciprocating part and in sliding contact therewith, a swinging arm pivotally connected to the frame of the machine and connected also with said reciprocating part for holding the latter to its Working contact with the lever, and a lifting rod or connection connecting the swinging arm with the lever, substantially as described.

4. A machine for pressing or riveting comprising a plunger which carries the moving die or tool, mechanism such as a cylinder having a reciprocating part adapted to impart motion to the plunger, a bar connected with the plunger and inclined to the path of motion of said reciprocating part and in sliding contact therewith, a swinging arm pivotally connected to the frame of the machine and connected also with said reciprocating part for holding the latter to its working contact with the bar, and a lifting rod or connection connecting the swinging arm with the bar, substantially as described.

In testimony whereof I have hereunto set my hand.

CHESTER B. ALBREE. lVitnesses:

G. I. HOLDSHIP, II. M. CoRwIN.

Images