US2138106A

US2138106A - Press-slide with gag-connection

Info

Publication number: US2138106A
Application number: US169175A
Authority: US
Inventors: Klocke William
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-10-15
Filing date: 1937-10-15
Publication date: 1938-11-29
Anticipated expiration: 1955-11-29

Description

Nov. 29, 1938. w. KLOCKE PRESS SLIDE WITH GAG CONNECTION Filed Oct. 15, 1937 2 Sheets-Sheet 1 INVENTOR. LL/fl/Y/ KLOC/(E ATTORNEY.

2-9, 1938. w. KLOCKE mass WITH GAG communes Filed 00%. 15. 1937 2 Sheets-Sheet 2 m m E V W.

M7 ATTORNEY.

I Patented Nov. 29, 1938 UNITED STATES PATENT OFFICE 2.188.106 I mass-suns wrrn GAG-common William Klocke, WoodhavcmRY. Application October 15, 1937, Serial No. 169,175

8 Claims.

This invention relates to press-slides with gagconnections, and provides improvement-s therein. The present invention provides a slide provided with a gag-connection. which is improved as to precision of operation, ruggedness. rigidity, and safety. There is also obtained virtual elimination of impact, as between the parts of the slide. and economy in the manufacture. The present invention has special utility in large presses, as for example. forging presses (with rated working force of 1000 tons for example).

An embodiment of the invention is illustrated in the accompanying drawings, wherein: Fig. 1 is a view in front elevation of a large 15 mechanical type forging press incorporating the invention.

Fig. 2 is a vertical sectional view of the slide.

Fig. 3 is a perspective view of akey, one of the parts being displaced to better illustrate the construction.

Fig. 4 is a somewhat diagrammatic view illustrating means for operating the gag-connection.

Referring to said drawings, numeral 10 deslg nates the press slide. The press slide comprises two parts ii and II, which parts are relatively movable longitudinally. The part i2 is a toolcarrying part. Part Ii is provided with suitable means H for attaching a connecting rod I6. These means may comprise spaced ears or lugs, between which the end of the connecting-rod fits, and through which lugs and the end of the connecting rod 8. connecting pin I is passed. A bearing surface 20 is provided on the part Ii for sustaining the thrust of the connecting rod i6.

The slide 10 is reciprocated by any suitable means through the connecting-rod i6, as by means of crank shaft 25 having a gear 21 thereon driven by a pinion 28 on the shaft 29 on which is mounted a fly-wheel pulley 30.

The slide i0 and driving parts are mounted on a frame 33. The frame here illustrated is of massive, rugged and rigid construction, and the press illustrated is a large mechanical type forging press. A mechanical type forging press, where the slide i0 has a definite stroke, and embodying the present improvements, is capable of producing forgings of a high degree of accu racy and precision. As an example of the size and duty of these forging presses, a forging press according to the design illustrated, has a height of over 19 feet, a weight of over 200,000 lbs., and is-designed to apply a normal working force to the work between the dies which are .mounted on the bedand slide ll, of 1000 tons. 55 The slide i0 is provided with suitable means forguiding its reciprocatory' movement, which, as here shown, may comprise machined faces 40 which slide against corresponding faces on the frame 33, and it is also confined front and back by means which include the gibs l2 fastened to the frame 33. The design is such as to obtain accurate reciprocatory movement of the slide under great stresses. 1 1

As heretofore stated, the parts. and I! of the slide iii are relatively movable longitudinally, and these relativelymovable'parts have lapping portions 04,45. The lapping portion 44, as here illustrated is a projection on theslide part i I. which enters a recess in theislide part [2, and

has-a sliding fit 'with' the lapping portions 45 on each side of said recess. U

. Additional lapping and guiding means, as here illustrated, may be provided between'the relatively movable slide parts I I and i2, and thereby the accuracy and precision in the working of the press aided. The slide parts II and i2 may-be provided with additional lapping portions 41, 48; the meeting faces of which are accurately fln- 'ished and fitted, as indicated at 49. to provide a broad bearing between said parts ii and i2.

Gibs 5i fastened to the slide-part i2 confine the slide part ii-at rightangles to-the faces 49,- so that the slide part i i hasa true axial movement in the slide part I2.

Key-ways 55 and 5B are formed in-the adjacent sides of the lapping portions 44, 45 of the slide parts ii and i2, and keys 60 are provided for locking the slide parts Ii and i2 together, and unlocking them. The key 60 may be of any suitable form, and the key-ways 55, 56 are of a shape to conform to the keys. Advantageously the keys 60 are of an oscillatory type, and comprise a semicylindrical oscillatory part 62, and the face 64 on the chord side of said semi-cylindrical part 62 is made so as to be flush with the meeting plane of the lapping portions 44, in the unlocking position of the key 60. An advantage of the semi-cylindrical oscillatory key is that a broad bearing surface may be obtained in the locking position of the key with a small amount of mo- 45 tion of the key to and from locking position. Advantageously the key 60 also comprises:another part 66 forming the comp1ementary"part-- to the semi-cylindrical part 62 so that the

parts

62 and 66 together constitute a full cylinder. The parts $2, 06 of the key fit snugly in the keyways and 56, and in many ways give the effect of a full cylindrical key in the locking position of the key, the key parts $6 aiding in sustaining the stresses and strains between the slide parts 55 2 88. 6 'u and I2, when the key locks these parts together and force is applied through the driving connections of the slide.

Means are advantageously provided for limiting the extension of said relatively movahleslide parts II and I2, so that the limiting position of extension corresponds to a position of the slide parts in which said key-ways 55, 56 are in register, and in which position the locking together and the unlocking of the slide parts II and I2 is el- 4 fected. The means for limiting the extension as aforesaid, ,may. as here shown, comprise-flanges I fastened to the slidepart I2,'against which -the slide part II abuts at said limit of its extension. The flanges I0 also perform another function. They maintain a mechanical connection between the slide parts I I and I2 so that the part I2 of the slide is kept from falling should other means .for supporting said lower slide part I2 (hereinafter referred to) fail. The slide part II being connected to the connecting rod I6 by the pin I8 will hold up said slide part I2. through the flanges I0, in the position of extension of said slide parts II and I2. I 1

Means are provided for counterbalancing the weight-of the slide part I2. Any suitable means for this purpose may be provided. As here showm the counterbalancing means comprises a fluid pressure device IS (hydraulic or. pneumatic) which device comprises acylinder I0 and a piston "ILhaving a rod I8 connected to the slide part I2 through an-arm or bracket IS.- The cylinder I may be connected through a pipe M to an auxiliary vessel of large size (not shown). so that the displacement of fluid in the cylinder is small as compared with that in the auxiliary tank, and thereby only small changes in pressure efl'ected by displacement of the; fluid to and from the cylinder I0; The counter-balancing means 15,

in the unlocked position of the slide parts II and I2, acts to hold the slide part I2 counterbalanced, so that the slide part II may make an idle reciprocation while the slide part I2 is supported by the counter-balancing means in a raised position.

Moreover, when the slide part I2 is thus supported, impact between the top of slide part II and the flange 10 on slide part I2 may be made very small.

Suitable means are provided for moving the keys 60 to locktogether and unlock said relatively movable parts II and I2 of the slide. In the form of key shown, that is, a semicyiindrical oscillatory key as illustrated in Fig. 3, the means are such as to oscillate or turn the key, and may comprise a gear wheel 85 and centered on the axis of the semicylindrical part E2, which meshes with a gear 01 having an arm 89 through which the said gear 81 may be turned, and the turning movement thereof imparted through the gear wheels 85 to the keys 60. a

Movement of the arm 89 to move the keys 00 may be efiected in suitable manner. As here shown, means for the purpose may comprise a cam 00 fastened on the crank shaft 25. andthereby turning with-the main crank. A follower 92 is pressed against the cam 90. and acts on a rod 94 through a bellcrank 98 and link 91. The rod 94 has a rack 00 thereon which meshes with a pinion IOI, which-pinion ha a crank-pin I03 which is connected to fork-piece I05 through a link I06.

The arm 08 is engaged by said fork-piece I05.

a link 3. The position of the cam all-shown in Fig. 4 corresponds to-the position of the keys-i0 in which the slide parts Ii and 12 are unlocked; when the treadle III is'free, the dog I03 engages .the collar I01, and holds thekey '50 in unlocking position. In this position the press may run witlb 6 out imparting reciprocation to the slide pant I2. Pressure on theireadle III releases the collar I01 from the dog )9; allowsth-followenfl to ride off of the hlgh'part of the cam 90. and'therod 9-. and fork-piece I05 to move under the action 10 Means are provided. herein for adjusting the bottom-of-the-stroke position of the slide,- which are especially suit-able ior a slide having a gagtype of connection. and. for a forging press. These adjustable means comprise a block I on which the tool or die is mounted (the-block I20 being.

shown with the usualdove-tail grooves I22 for attaching tools). Between the block. I20. and thebottom cfthetslide part I2-a disk I25 is placed having one or moresplralinclines I21 on a face, which inclineslbear against corresponding'inclines I29 on either the block I20 or the slide part I2. M here shown the inclines I 29 are formed on a-disk I3I which is fastenedto the block I20 by dowel-pins I33. Thebloek I20 is fastenedagainst the underside of the slide part I2, through the disks I25, I3I.'by an axial bolt I31 and a nut I39. The disk I25-is round. andmay be turned to adjust the position ,0! the block I20 with relation to the bottom of the slide I2. The block I20 40 is preferably provided with rectangular sides having a sliding fit against faces on the slide'part I2, as indicated at I40. The block I20 is further confined by gibs I42 fastened to the slide part.

I2, and acting on the block I20 at right angles to 45 the faces I40. The block I20 is very accurately and strongly supported by the means described, which means contribute to the formation of accurate and precisely formed forgings.

Operation clutches. In a press such as here shown, provim-e. with a slide having a gag-connection. the fly wheel 30, gear 21, crank shaft 25,- connecting rod I6, and slide part II. ordinarily run continuously. I

When it is desired to forge. the slide part I2 is locked to the slide part II, and when it is desired to omit a forging action by the tools, the slide parts I0 and II are unlocked. The normal conditlon and relation of the slide parts II and I2 may be either a. locked or an' unlocked one, In the embodiments shownherein (see Fig. 4) the slide parts II and I2 are normally unlocked. and the iorging action is brought about by the attendant pressing a treadle to etfect the locking together of the slide parts II and I2. Release of the treadle effects unlocking of the slide parts II and I2.

When the keys are in the position shown Fig. 2, the slide part II may reciprocate without driving the slide part l2. The counterbalance I5 when the keys 80 are in unlocking position, supports the slide part I2 in a raised position.

When it is desired to operate the press to forge (or to perform some other forming operation) the workman presses and holds down the treadle III. The normal position. of the parts prior to the pressure of the treadle is shown in Fig. 4. The keys 60 are in unlocking position, with the chord faces 64 flush with the meeting plane of the lapping parts 44, 45, so that the slide part II reciprocates idly with relation to the slide part I2. The pressure on the treadle I I I withdraws the dog I09 from the collar I01 on the rod 94. The parts are now in potential condition to bring about the locking together of the slide parts II and I2. Whenthe slide part II makescontact with the flanges Ill on the slide part I2, the keyways 56 in the slide part I I are in register with the-keyways 55 in the slide part I2. This condition continues while the crank on shaft 25 is passing through an arc in the upper part of the circle of revolution of the crank, so that the key parts 92 and $8 of the keys 60, during the movement of the crank in said arc, may enter the opposite keyways and lock the slide parts II and I2 together. On the down stroke of the slide I II (after the follower 92 moves off of the high point of the cam 90) the arm 89, acting under the influence of spring I I 4, rod 94, rack 99, pinion IIlI, crank pin I93, link I96, and fork-piece I95, turns the keys 69 to locking position, locking the slide parts I I and I2 together so that they are driven as a unit to perform the forging or other work of the press. The slide parts II and I2 remain locked together until the keys are moved to unlocking position by the high part of cam 90, which occurs when the crank on shaft 29 (after making a substantially complete revolution) again reaches a position in its upper arc of movement. The high part of cam acts on the follower 92, and on the arm 89 through the intermediate parts hereinbefore described, to turn the key 60 to unlocking position. The cam 90 may be set so that its high part acts on the follower 92 at the upper dead center position of the crank, or thereabout. If the treadle III has not been released when the high part of the cam 90 passes the follower 92, the keys Iill will be im- 1 mediately returned to locking position, and the slide parts II and I2 will be driven as-a unit on the working stroke which is initiated at this time, and on succeeding working strokes, as long as foot-pressure is maintained on the treadle I I I.

If the treadle III is released while the slide I 0 is on its up-stroke (before or while the high part of cam 90 passes the .follower 92), the dog Ill would engage the collar I01 on the bar 94 when the high part of the cam 90 makes contact with the follower 92 (at which time the keys 90 are moved to, unlocking position) and prevent the keys 60 being moved to locking position when the high part of cam 99 passes the follower 92. When the high point of the cam 9!) acts on the follower 92 as just described (position Fig. 4), and the rod 94 is actuated, the rack 99 under the action of spring I I! rotates the pinion IIlI, and the pin I03 thereon shifts the fork-piece III! to move the arm 99 to turn the keys 60 to the position shown in Fig. 2, that is, where the chord faces 64 of the cylindrical key parts 82 and 68 are flush with the meeting plane of the slide parts II and I2. The slide part II can then reciprocate idly with respect to the slide part I2, the slide part I2 being the slide.

supported in an elevated position by the counterbalancing means 15.

To set the dies or tools (not shown) mounted on the bottom of slide I0 and on the bed, the nut I39 on the bolt I31 is loosened and the disk I25 is turned until the block I20 is adjusted at a level which provides a proper clearance between the dies or tools. The nut I39 is then tightened to hold'the block tightly in its adjusted position. The spiral inclines I21 on the disk I25 and on disk I9I, depending on the relative positions thereof, determine the position of the block I20 with respect to the bottom of the slide part I2, and hence the bottom-of-the-stroke position of A broad and strong bearing is provided by the inclines I21.

The invention may receive other embodiments than that herein specifically illustrated and described.

What is claimed is:

1. A press-slide comprising two parts, relatively movable longitudinally, one a tool-supporting part and the other having means for attaching a connecting-rod thereto, said relatively movable partshaving lapping portions, key-ways in adjacent sides of the lapping portions, a semicylindrical oscillatory key, and means for moving said key to and from a position wholly in one key-way to and from a position partly in each of the two key ways to lock together and unlock said relatively movable parts.

2. A press-slide according to claim 1, further comprising lateral guides on the press frame for confining the movement of one of said relatively movable parts, and lateral guides on the aforesaid relatively movable part for guiding the other relatively movable part.

3. A press-slide according to claim 1, further comprising means for limiting the extension of said relatively movable slide-parts, wherein the limiting position corresponds to a position of the slide-parts in which said key-ways are in register.

. 4. 'A press-slide according to claim 1, further comprising means for counter-balancing the weight of the lower one of the slide-parts.

5. A press-slide according to claim 1, wherein said key comprises another key part forming the complementary part of a cylinder.

6. A press-slide comprising two parts relatively ,movable longitudinally, one a tool supporting part and the other having means for attaching a connecting-rod thereto, said relatively movable parts having lapping portions, key-ways in adjacent sides of the lapping portions, keys comprising a semi-cylindrical oscillatory part, the face on the chord-side of which, in the unlocking position, is flush with the meeting plane of said lapping portions, means for oscillating said keys to look together and unlock said relatively movable parts, and means for limiting the extension of said relatively movable slide-parts to a position corresponding to a position of the slide-parts in which said key-ways are in register.

A press-slide according to claim 6, wherein said keys further comprise another part forming the complementary part of the cylinder.

8. A press -slide according to claim 6, further weight of the lower one of said slide-parts.

WILLIAMKIDCKI-