US2636405A

US2636405A - Rotary swaging machine

Info

Publication number: US2636405A
Application number: US15535A
Authority: US
Inventors: Smith Samuel
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-03-18
Filing date: 1948-03-18
Publication date: 1953-04-28
Anticipated expiration: 1970-04-28

Description

April 28, 1953 5. SMITH ROTARY swAGING MACHINE Filed' March 18 1948 l l f l r www Patented Apr. 28,n 1953 OFFICE ROTARY SWAGING MACHINE Samuel Smith,fEhndon, England Applieaun March-"1s, 194s, serial No. 15,535 In Great Britain March 18, 1947 The present invention has relation to rotary swaging or forging machines more particularly those of `the type in which a stationary spindle or central diehead is provided with radially displaceable die blanks which are acted upon by a rotatable iiywheel or like device mounted upon the spindle or central diehead with the intermediary of a plurality of circumierentially dis posed rollers, the present invention having for its object primarily to provide for the emcient mechanical operation of the die blanks in the stationary spindle whereby they may be opened and. closed to suit a particular piece of work and to operate at a predetermined setting. With the present mechanism inview of the fact that the dies merely reciprocate it is possible to pro'- duce square or other non-circular sections or formations.

According to the present invention a rotary swaging or forging mechanism of the type hereinbefore referred to and having a stationary spindle or central diehead surrounded by a rotatable iiywheel is provided with a plurality of wedges slidable in relation to the said body and interposed between the die blanks and the hammer blocks, said wedges being advantageously interconnected and having remote control. Further the stationary diehead may carry wedge members calculated by their adjustment to limit the movement of the hammer blocks.

In order that this invention may be clearly understood and readily carried into practice reference may be had to the appended drawings, upon which:

Fig. 1 illustrates in vertical sectional elevation a rotary swaging or forging machine constructed according to the present invention, and

Fig. 2 illustrates the machine from a frontal aspect in part sectional elevation.

In a convenient embodiment of the present invention a stationary hollow spindle a is suitably mounted in a pedestal b which forms the body of the machine, the spindle at its extremity being provided with a diehead a1 which may be integral therewith or detachably secured thereto. The diehead is provided with at least one central transverse die slot a2 across its face, each radial section of which carries a dieblank c and hammer block d, the said hammer block being adapted to receive blows from the annular rolls e mounted in abutting relation to each other in a channel intermediate the diehead f and the diehead a1 and adapted to rotate therebetween. The diehead ,f is accordingly adapted for rotation relative to the stationary diehead a1. As illustrated 1 claim. (c1.V vs -22) the diehead is provided with four radial slots adI at right angles to each other and carry eight diepieces which are mitred together at the centre and are formed at their working faces to produce square, rectangular and swaged or other forged sections, but three die slots may be provided each having two piece dies to suit the production of certain sections and any desired number of die heads and dies may be used for'partlcular jobs such .as the luting of reamers and the like. The rotating ywheel or like device f carrying the rollers e may be grooved for a V-rope or` other suitable drive,langes f1 being provided tosustain side thrust. In order to provide suitable means for maintaining pressure between the dies and the hammers, wedges g are interposed and the inner extremities of the wedges being engaged with a circular disc g2 mounted on a rod or tube g3, termed a wedge-carrier, within the spindle a of the machine. Lateral movement of the wedge-carrier g3 is controlled and adjusted by means for example of a bell-crank lever g4 connecting with a link g5 operated by a pedal lever gs so as to provide the desired pressure between the dies and hammers, or alternatively any suitable form of linkage or other mechanism may be provided for axially displacing the wedge carrier g3 for the purpose of this invention.

In some instances it is desired to displace the wedge-carrier g3 a substantial distance. This not only permits displacement of the die blanks c for the introduction of an` article to be forged, but allows clearance between g2 and the adjacent part a3 of the head for any head or enlargement on the article being forged, that is to say, g2 and g3 are substantially removed to permit as for instance of the centre part of a length of rod being forged or swaged in some particular manner without detriment to its inner or outer extremities.

As previously stated the wedge-carrier may be controlled by means of linkage g1 g5 and this may be operated by a foot pedal or lever gs, the operation of which withdraws all the wedges g simultaneously and permits the full entry of the stock between the dies. A reverse movement of the wedges g takes up the slack and swaging or forging can then take place. It is highly important to restrict and control the amount of die opening and to ensure that the dies open an equal amount through their whole length. In order to do this a wedge or cotter h is interposed between one side of each hammer block d and the wall of the head a1 in a suitable tapered recess, the said wedge or cotter 'being controlled by an adjusting screw and locknut h1 h2 in the die head so that the cotter h restricts the outward movement of the hammer. The number of annular rollers e in the machine must be equally divisible by the number of hammers d in the die head, for example: if there are four slots at right angles as illustrated and four hammers d, the machine must carry either eight, twelve or sixteen rollers e. or any number in multiples of four. When the machine is used for hot working it is desirable to introduce an air blast on the dies to remove scale.

By means of such a machine as herein described it is practicable not only to carry out hot swaging and pointing operations such as the tanging of files, hand tools, spikes, barrow forks and the like but high precision cold swaging such as fluting and squaring taps, reamers and the like.

By providing a suitable feeding attachmen which will offer the stock or blank tothe swaging dies at a pretermined speed of feed and r0.- tation, spiral grooves may be swaged such as are used in twist drills and the like, the swaging dies being suitably shaped to produce the desired form of groove.

lclaim:

In a rotary swaglng device the combination comprising a stationary hollow spindle, a head xedly secured to said stationary spindle having formed therein a plurality of radially disposed slots located in spaced angular relationship, a plurality of hammer blocks and die blanks, each block and blank being arranged in axial alignment and movably positioned in one of said slots, a iiywheel supported by said stationary spindle for rotation in a plane transverse to the axis of said spindle, a plurality of rollers located within a channel intermediate said flywheel and said xedly secured head and positioned to contact an end of said hammer blocks and exert pressure thereon in an axial direction during rotation of said flywheel, a plurality of rst movable wedges, each of which being positioned intermediate one of said axially aligned hammer blocks and die blanks, a carrier member connected to each of said rst movable Wedges, an actuating member connected to lsaid carrier member and reciprocable in a di- References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,480,077 Johnson Jan. 8, 1924 1,507,621 Perry Sept. 9, 1924 2,126,923 Romanelli Aug. 16, 1938 FOREIGN PATENTS.

Number Country Date 23,485 Great Britain Oct. 22, 1896 570,734 Great Britain July 19, 1945