US1820208A - Forging machine - Google Patents

Description

Aug. 25, 1931. w.; H. WINEMAN 1,820,208 7 FORGING MACHINE Filed Jan. 4, 1928 2 Shets-Sheet l are lweni'or: wadeflwv'nemam Aug. 25, 1931. w. H. WiNEMAN 1,320,208

' FORGING MACHINE Filed Jan. 4, 1928 2 Sheets-Sheet 2 WE wmwmm Ewen/2'07"? I Patented Aug. 25, 1231 cairn raves r FFICE ears , WADE H. WINE-111A 1, OF" MICHIGAN CZTY, INDIANA, ASSIGNOR TO SULLIVAN FORGZNG MACHINE Application filed January 4, 192%. Serial No. 244,480.

My invention relates to forging machines of a type suitable for use in making and sharpening drill steels.

It is an object of the invention to provide 5 an improved forging mechanism of the type designated. Another object oi the invention is to provide an improved clamping mechanism for holding a forging in position to be forged. A more specific object of the invention is to provide an improvement in the actuating mechanism of a clamping device for a machine similar to that disclosed in my copending application, Ser. No. 59,424, filed Sept. 29, 1925. Other objects and advantages of the invention will hereinafter more fully appear. I

In the accompanying drawings I have shown for purposes of illustration one form which my invention may assume in practice.

In these drawings, Fig. 1 is a side elevation of a forging machine, constructed according to my invention. Fig. 2 is a section on line 22 01" Fig. 1 save through the valve mechanism where the section is approximately as on line 2a2a of Fig. 4. I

Fig. 3 is a fragmentary horizontal section on line 33 of Fig. 4.

I Fig. 4 is a vertical section on line 4% of Fig. 2.

In the illustrative embodiment of my invention there is shown a forging machine having a stationary base portion 1 with openings 2. As shown in dotted lines in Fig. 2,

the frame has an upper portion 3 in which is mounted a bearing 4 for a movable clamping jaw generally indicated at 5 and being made in the form of a bell crank member having a horizontal arm 6 and a vertical arm 7.

The horizontal arm has a recess 8 for holding a clamping die 9 in position to cooperate with a stationary die 10, which may be mounted in a recess 11 formed in a member 12, which may be integral with the frame.

The movable clamping jaw is normally held in open position by means of a tension spring 13 having one'end fixed at 14 to the member 5 and the other end fixed to the frame at 14 The swinging arm 6 also has a gaging die 15 adjustably mounted thereon which cooperates with a stationary die 15 in a gaging operation, such as gaging the diameter of a drill steel bit.

The mechanism for actuating the clamping device to closed position, which forms the suoject matter to which this invention is particularly directed, will now be described. A member 16 is mounted for limited horizontal mo vrment in an opening 17 in the side of the frame and is provided with a horizontal bore 18 in which piston 19 of relatively small diameter is slidably mounted. A piston rod or link E IO'is provided having a rounded end engaging the rounded inner surface of the piston 19 and the other end of the rod is pivotally connected with the lower end of the bell crank arm 7. The relative movement between the piston 19 and the member 16 takes care of practically the entire range of movement of the movable clamping jaw, but the piston .19 is not of sufficient diameter to exert the required clamping force upon the dies 9 and 10. F or the purpose of exerting a relativeiy great clamping force upon the swinging member 5 l have provided means to form a rigid connection between the member 16 and the extension of the bell crank 7 and in this instance the connection takes form of a bar or link 21 pivotally connected to the member 16 at 22. This bar has a downwardly projecting extension 23, which is'adapted to be engaged by a small plunger 24 to actuate bar 21 to its operative position as illustrated in full lines in Fig. 2. This plunger 24 is reciprocably mounted in a bore 2 1 formed in the member 16, this bore 24L communicating with the cylinder 18 through a passage 24' The lower end of the arm 7 has a notch 25 :l'ormed therein to receive the end of bar 21. if desired, an adjusting screw 26 may nSO be added in the position shown. The uter end of cylinder 16 may be suspended by means of link 27 from a lug 28 formed on the frame of the machine. 16 may be bodily moved a limited amount at the proper time by means of fluid pressure acting on a diaphragm 29. It will be noted that the member 16 has an annular projecting flange to which may be secured a guiding flange 31 cooperating with the opening 17 in The member I the frame and link 27 to support and guide the member '16. A plate 32 secured to the frame by any suitable means such as bolts 33 serves as a mounting for the valve mechanism which controls the clamping device and the horizontal hammering motor.

The clamping jaws, which have justbeen described, serve to hold a forging, such as a drill steel, in posit-ion to be hammered by means of the horizontal hammering motor 34, which may be arranged and constructed as described in my copending application referred to above. The machine is also equipped with a vertical swaging hammer 35 carrying a movable die 36, which cooperates with a stationary die 3. to produce the desired shape of drill steel bit. 7 i

Returning to the valve mechanism it will be noted in Fig. 3 that a valve casing 38 is formed integral with the plate 32 and is provided with a passage 39 for supplying air from an inlet connection 40 to a chamber 41. A supplemental valve casing 42 may be se cured to the casing 38 by means of bolts 48 and fluid may besupplied from the chamber 41 through a passage 44 in the casing 42 and chest by a port 50.

passage 45 in the casing 38 to the diaphragm 29. As best shown in Fig. 2, a passage 46 communicates by a port 4'? with the valve chest to supply air by means of a flexible connection 48 to the cylinder 18 for the purpose of actuating the piston 19. The diaphragm and cylinder 18 may be vented to the atmosphere at the proper times by means of a passage 49 communicating with the valve At the opposite side of the valve casing there isprovided a connection 51, which is always in communication with the chamber 41 for supplying air to the vertical swaging hammer. A connection 52 is also provided for the purpose of supplying air to the horizontal hammering motor from a chamber 53, which may be supplied with pressure fluidthrough ports 54and 55 underthe control ofarotary plate valve 56, which 5 a so controls ports 47 and 50. At one side (Lil oi the plate valve there is provided a lobe 57, which is hollowed out at 58 on the side next to the casing 42, so as to allow the cylinder 18 .and'diaphragm to communicate with passage-49 at the proper time so as to vent the same to the atmosphere. The valve has also a pair of lobes on theopposite side designated 59 and 60 for the purpose of controlling ports 54 and 55 respectively. A spring 61 serves to press the valve against its seat on the head 42. The plate valve is controlled through a shaft 62 by means of a handle'63, which projects into a position to be easily accessible to the left hand of the operator. This handle carries an extension 64 which cooperates with a pair of retaining bolts 43 to limit the movement of the valve. A suitable locking device is also provided to prevent the valve from being rotated to aposition to allow communication between the passage 44 and the valve chest 41 until the movable jaw has been actuated to its closed position by means of the piston 19. To accomplish this result a link 65, which has a lost motion connection with a pin 66 carried by arm 7, as clearly illustrated in Fig. 2, slides in a hearing 67 in the frame and plate 32 and is normally urged to the left by means of a compression spring 68 acting between the plate 32 and a collar 69 secured to the link. The end of this link is projected, as indicated in dotted lines, into the path of handle 63, except when retracted by the closing of the clamping jaws, and is so located as to prevent the valve from being rotated any more than merely to allow communication between port 47 and the valve chest. The supply of air to the swaging motor is controlled by means of a valve 70 in the line 51, which leads from the valve chamber. This valve is controlled by means of a foot lever 71 located adjacent the base of the machine and pivoted thereto at Y 2. The connection between the valve 7 0 and the swaging motor is not indicated in detail since its details form no part of the present invention. The machine may also be equipped with a hole blowing device having a pipe 73 which may be supplied with air from any suitable source and a nozzle 7 4 of a size adapted to fit the bore of a drill steel.

In view of the above description, the operation of my improved forging mechanism will be readily understood. A drill steel is positioned upon the stationary die 10 and the handle 63 rotated in a downward direction. which rotates the plate valve to the right as viewed in Fig. 4, and the initial movement of the valve will rotate the lobe 57 so as to permitcommunication between the valve chest and port 47 whereby air is supplied through the inlet connection 40, passage 47 and the flexible connection 48 to the cylinder 18. Piston 19 is thus moved outwardly to actuate the arm 7 to the right and thus swing the clamping jaw to closed position. The plunger 24 is simultaneously subjected to pressure by means of fluid flowing from the cylinder 18 through the passage 24 and thus tends to swing the bar 21 in an upward direction. Suitable lugs may be provided on member 16 to serve as stops for the bar. When the clamping jaw moves to its closed position the end of bar 21 swings into the recess 25, thus forming a rigid connection between the member 16 and arm 7 of the clamping jaw. This movement of the swinging member 5 also causes link to be moved to the right out of thepath of handle 63, whereupon the handle may be further rotated to bring passage 44 into communica tion with chamber 41, whereby live pressure is supplied to the diaphragm 29 throughthe inlet connection 40 and passages 44 and 45.

Further movement of the valve will open I may be modified and embodied in various 9 by Letters Patent is:

portsl54 and 55 and supply pressure fluid to the chamber 53 and pipe 52 leading to the horizontal hammer motor. lVhen it is desired to rel-ease the drill steel from the jaws Sand 10 the valve 56 is rotated by means of handle 63 inthe reverse direction thereby closing communication between passages 42 and 4st and the valve chest all and establishing communication between said passages and thevent passagel) through the undercutportion 58 of the plate valve. This releases the pressure against plunger 2% and the bar 21 drops away from recess 25 by gravity. It will be understood that the areas of pistons 19 and 24; are so proportioned that the weight of arm 21 will overcome the pressureagainst plunger 24 while the pressure acting against piston '19 is still sutlicient to equalize the tension of spring 13, thus allowing the arm 21 to drop freely away from recess 25 and set screw 26. The movable clamping jaw will automatically su 'ing to open position as indicated by dotted lines through the action of spring 13. Pressure fluid may be'supplied at will to the swaging motor by operating the foot lever 71 and opening valve 70. i

As a result of my invention it will be ap parent that there has been provided a very much simplified construction, which avoids the use of a toggle joint in the mechanism for actuating the movable clamping jaw and which at the same time is very conservative in the use of pressure fluid for actuating the clamping jaws. This is true because the cylinder 18 requires only a small amount of air'and the large area diaphragm effects the necessary clamping pressure without requiring a large amount of air, since its movement is slight.

While I. have in this application specifically described one form which my invention may assume in practice, it will be understood that this form has been used for purposes of illustration and thatthe invention other forms without departing from its spirit or the scopeof the appended claims.

What I claim as new and desire to secure 1. In a forging machine, a clamping device comprising a pair of relatively movable jaws, fluid pressure means for closing said jaws comprising a plurality of pressure fluid actuated elements movable relative to one another in the same direction, one of said elemerits presenting a larger effective area to the action of fluld pressure than another of said elements, and means whereby each of said elements is adapted to transmit through solely mechanical connections its operating force during the clamping operation.

2. In a forging machine comprising a pair of relatlvely movable aws comprising a pressure fluid actuated element presenting a relatively small effective area to fluid pressure for operating sald aws to closed position, a fluld actuated element presenting a relatively large area to the action of fluid.

mechanically and independently of said fluid actuated element which moves said jaws to closing position.

3. In a forging machine, a movable me1nber, means for actuating said member comprising a plurality of relatively movable pressure fluid actuated elements arranged in tandem, one of said elements being connected to said member to cause initial movement thereof, and means for automatically connecting another of said elements to said m0vable member by the time initial movement is completed to effect final movement thereof.

at. in a forgin machine, a pair of relatively movable clamping jaw members, means for causing initial closing movement of said jaw members, a pressure fluid actuated element for causing final closing movement thereof, and means providing a connection between said element and one of said jaw members only after initial closing movement takes place comprising a member movable into and out of direct engagement with said latter member.

In a forging machine, a pair of relatively movable clamping jaws, means for causing initial closing movement of said jaws, a pressure fluid actuated element for causing final closing movement thereof, and means providing a connection between said element and one of said jaws comprising a bar pivotally mounted on said element and swingable into and out of engagement with said movable aw only after said initial closing movement takes place.

6. In a forging machine, a pair of relatively movable clamping jaws, means for causing initial closing movement of said jaws, a pressure fluid actuated element for causing final closing movement thereof, and means providing a connection between said element and one of said aws comprising a bar pivotally mounted on said element and fluid pressure means automatically operable on completion of said initial movement to swing said bar into position to effect connection between said element and one of said jaws.

7. In a forging machine, a stationary clamping jaw, a movable clamping jaw, means for causing initial closing movement of said jaws, a pressure fluid actuated element for eifecting final closing movement and clamping action ofsaid jaws,s'aid element being stationary and disconnected from said iii - and one of movable jaw during initial closing movement, and means for automatically connect- 7 said jaws including a movable element normally stationary during initial closing mov ment, and means for connecting or disconnecting said element to the movable jaw, said latter means being connected upon completion of he initial closing movement.

10. in a forging machine, a pair of relatively movable clamping jaws, fluid actuated means for operating said jaws comprising a movable cylinder element, a piston reciprocable in said cylinder to cause initial closing movement while said cylinder remains stationary, means for automatically establishing a connection between said cylinder element and one of said jaws after initial closing movement has been effected by said piston, and pressure fluid means of relatively 1 large area and short travel for moving said cylinder element aft-er connection withsaid jaw to effect the final closing movement and clamping action.

11. In a forging machine, a pair of relative y movable clamping jaws, means for closing said jaws and cfl'ecting clamping action between the same comprising a pressure fluid actuated mechanism including a cylinder and piston of relatively long travel and 1 small transverse area, a second pressure fluid actuated element of relatively large area and small travel, and means for connecting said second mechanism to efiect the clamping acm1 of said jaws only after initial closing 1 movcmen" by said iir mechanism, said first fluid actuated mechanism being bodily movable with said second fluid actuated mechanism.

12. In a forging machine, a pair of relatively movable clamping jaws, means for causing initial closing movement of said jaws, a pressure fluid actuated element for causing final closing movement thereof, means for providing a connection between said element l jaws connected with the latter only upon completion of said initial closing movement, and means for preventing supply of pressure fluid to said fluid actuated element until said connecting means has moved to operative position.

, 13. In a forging machine, a pairof relafurther characterized in that said rigid connecting element moves towards connecting position transversely of the direction of movement of said power actuated element of the initial closing mechanism.

15. In combination, in a clamping mechanism, relatively movable clamping jaws, and pressure fluid operated means for closing said ja s including a plurality of pressure fluid actuated elements each having a surface on which pressure fluid acts, said surfaces lying in closely adjacent parallel planes in the released position of said clam-ping mechanism and one of said surfaces being much larger than another, and connections through which said elements transmit mutually independently their pressures to effect clamping.

16. In combination, in a clamping mech anism, relatively movable clamping jaws, and pressure fluid operated means for closing said jaws including a plurality of pressure :fluid actuated elements each having. a surface on which pressure fluid acts and movable serially in the same direction to eflectclamping, and means whereby said elements may separately but simultaneously apply their pressures to effect clamping.

In testimony whereof I aflix my signature.

W'ADE H. WINEMAN.

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