US1706141A

US1706141A - Power-press control

Info

Publication number: US1706141A
Application number: US198297A
Authority: US
Inventors: Arthur A Byerlein
Original assignee: Hamilton Press & Machinery Com
Current assignee: Hamilton Press & Machinery Co; Hamilton Press & Machinery Com
Priority date: 1925-01-07
Filing date: 1927-06-11
Publication date: 1929-03-19
Anticipated expiration: 1946-03-19

Description

- March 1929- A; A. BYERLEIN 1,706,141

POWER PRESS CONTROL Original Filed Jan. 7, 1925 3 Sheets-Sheet 1 INVENTOR. My 4 Wm BY a444, he,

ATTORNEYS.

March 19, 1929. R m 1,706,141

POWER PRES S CONTROL Original Filed Jan. 1925 3 Sheets-Sheet 2 INVENTOR.

Mai/4% BY WM M ATTORNEYS.

March 19, 1929. R m 1,706,141

POWER PRESS CONTROL 3 Sheets-Sheet 3 Origingl Filed Jan. 1925 y/f INVENTOR.

\ make/MM ATTORNEYS.

Patented Mar. 19, 1929.

NITE STATES 1,706,141 PATENT OFFICE.

ARTHUR A. BYVERLEIYN, or DETROIT, MICHIGAN, ASSIGNOR TO THE HAMILTON PRESS & MACHINERY COMPANY, or HAMILTON, OHIO, A CORPORATION or OHIO.

rownarnnss CONTROL.

.Original application filed January 7,

1925, Serial No. 1,018. Divided and this application filed June 11, 1927. Serial No. 198,297.

This invention relates to power presses and particularly to the control mechanisn therefor, the present application being a. division of my prior application Serial No; 1,018 filed January 7, 1925 for power press control.

One of the principal objects of the present invention is to provide a powerpress with control mechanism so constructed that the press may be manually started and stopped at any point in the cycle of operations of the press and which embodies means for returning the control member by which the manual control is effected to stopping position even if the operator should absent-mindedly hold the lever in the on position.

Other objects and advantages of the 1nvention will be apparent from the following de-' scription taken in connection with the accompanying drawings in which p 7 Fig. 1 is a front elevation of'a portion of the press showing the control mechanism of the present invention;

Fig. 2 is a side elevation of the press;

Fig. 3 is an elevation of the trip mechanism forming part of the present invention;

Figs. 4 and 5 are sectional views with parts broken away, taken on the line 4:& of Fig. 8 and showing different operating positions of the trip mechanism; T

6 is an exploded sectional view on the line 66 of d; and

Fig. 7 is a detail .view of the trip actuated mcml 1'.

lie; 2O designates a part of a power press which is provided with a slide member 21 slidably mounted in the side frame 22 and driven from the crank-shaft 23 to which is connected by suitable means such as cranks 19 to impart a reciprocating motion to the slide.

it will be understood that the general ar- 'angement of the press is similar to the contraction embodied in my copending appli- "ng to the drawings,

pose of imparting such motion to the slide the press is provided with a driving member such the continuously rotating shaft 24 to which the crank-shaft may be connected from time to time by means of a gear train including the gear 25 and the clutch 26. A brakeband 27 adapted to bear frictionally upon the outer surface of the clutch housing or casing 26 is provided to assist in arresting the rotation of the crank-shaft 23 at the propcr predetermined point in the cycle of operations.

The clutch and the brake are controlled from the clutch control shaft 30 to which is keyed a lever 31, the lower portion of which is formed as a yoke and is connected with clutch sleeve 32. The upper end of the lever 81 is connected through the link 33 to the joint between toggle links 34 and 3 1 so that movement of link 33 rocks the arm 35 to which the upper toggle lever 34 is pivoted. Arm S5 fast on the shaft which bears a second arm 35 connected at its end to red 36 which is fastened to one end of the brake-ban d 2.

The opposite end of the brake-band .is fastened at 3'7 as shown in Fig. 2. The construction of the clutch is such that when the lever 31 is turned in a clockwise direction as viewed in Fig. 1, the clutch connects the crank-shaft 23 with the driving shaft 24 to cause the operation of the press. At the same time the lever 81 breaks the toggle 34 to release the brake. lVhen the shaft 30 is rotated in an opposite direction the clutch is clisengaged and the toggle straightened to apply the brake, it being understood that the exact time of application or release of the brake 27 may be varied by adjustment of the clutch and the brake and their operating mechanism.

The operation of the clutch and brake to iereby effect connection or disconnection of ie slide and the crankshaft is controlled by a mechanism as will now be described, and embodying an operating handle 40 which when moved to the press starting position &0" as shown in dotted lines in Fig. 1, moves the link 4-1 upwardly, this movement being transmitted through the operating shaft 42 to raise the link thereby causing engagement of the clutch and rel ase of the brake and consequent operation of the press. The control mechanism is such that the press may be stopped and started at any point in its cycle of operations by suitable operation of the handle 40, or it may be stopped automath cally at a predetermined point in the cycle of operations of the press by trip mechanism operated from the crank-shaft 23 by means of link 44. The present invention embodies means for normally insuring the stopping ofthe press and the return of the 'ha ndle 4O even if the operator ui-iinte'ntionally or "absent-mindedly retains his hold on the lever Thecont'rol mechanism includes an operat- 1 mg shaft 42 ournaled for rotation in a bracket46 secured to the side of the press.

Link 43 is connected between a rearwardly extending lever .47 rigidly-secured to 'one'end of the shaft 42 and a rearwardly extending lever 36 rigidly securedon the clutch operatingsh'a-ft 30. A tripactuated member 48 is keyed to the shaft 42, this member 48 being substantially U+shaped as shown in Fig. 7. The cross-bar of the Uv provides a forwardly extending headp'ortion 49, and the sides are a pair of spaced apart rearwardly extending arms terminating in lugs 50. Loosely mounted on the operating shaft 42'between the lugs 50 of the U-shaped member 4 8 is a lever 51 which has

lugs

52 and 53 extending from its opposite sides for engagement with the lugs 50 of the member 48. These

lugs

52 and 53 are so spaced as to permit a certain amount of lost motion betweenthemselv'es and lug 50. The control lever 40 is thus connected through alost motion to theoperating shaft 42 since the lever 51 is pivotally connected to the upper endof link41,"thelowerend of which .con

nected to a lever 54 on one end'of the shaft 55 on which the operating handle 40 is fastened. As shown, a weighted lever 56 is also secured on the shaft 55 to normally urge this shaft and the operating handle 40 towards the right or to press stopping position as viewed in Fig. 1, and consequently tend to maintain it in its normal relationship with operating s'haft42, with the

lugs

52 and 50 in engagement. 7

Loosely mounted on the operating shaft 42 on either side of the trip actuated member 48 are a pair of frames'57 herein shown as of triangular shape which are connected bybolts and spacers as at '59 and 60 to forma cagelikeitrip carrier. Pivotally mounted on bolt 60 of the trip carrier is a trip or actuated part 61 having alpair of notches or shoulders 62,

adapted to engage a face or shoulder 68 formed on the forwardly extending head 49 r of the trip actuated member 48. The trip or actuating-part 61 is normally held in engage- V ment with the actuated pa rt '48 by means of a spring pressed plunger 64 which iscarried in the boss 65 of the trip carrier 57. The head portion 49 ofthe trip actuated member carries an unlocking pin 66 which is slidably tending lug 67 formed'on the lever 51. The

unlocking pin 66 is caused to be moved in its aperture by relative movements of the lever 51 and the rock shaft 42 to whichthe lug 50 is fastened. The trip carrier 57 is connected by means of bolt 59 and rod or link 44 with an eccentrically mounted crank-pin provided on the crank plate 68 secured on theend of the crank-shaft 23. The crank plate 68 is angula'r'ly adjustable with respect to the end of thecrank-sha-ft 23, by means of the slots and lock bolts shown in Fig. 2, whereby the posi-' tion of the trip carrier 57 and the link 44 may be varied with respect to the strokeof the slide 21. At its upper end the trip or actuating part 61 carries a pair of grooved side plates 91 whichprovide a guide for afslidable block 92 having a top head portion and a depending slide portion. A screw 93 secured in theactuatingpart 61 and passing through aperture in the block 9-2 limits theupward sliding movement of the block and at the same time-serves as a central supporting post for the coiled spring 94 which normally holds the block in its uppermost position. Down- 1 ward sliding movement of the block 92 is limited by engagement of the block itself with the end'of the actuating part 61 as illustrated in Fig. 5. The shoulders 62 extend-laterally from the side plates 91 for engagement with the shoulder 63 of the trip actuated part. When the block 92 is in its normal uppermost position it will be engaged by the rear end of the unlocking pin 66 when this pin is moved rearwardly, and the actuating part 61 will then be moved about its pivot 60 so that the engagement of the shoulders 62 with the shoulder 63 will be disengaged.

To placethe press in operation theoperat ing handle 40 is moved to the start-in position '40, see Fig. 1. This raises the link 41 and lever 51 whereupon the lug 67 carried by the lover 51 moves the unlocking pin 66 to theright from the position shown in Fig.

'4 to push against the slide block 92 of the trip actuating part .61 and thereby swing this actuating part around its pivot 60 and cause the disengagement of the shoulders 62 and the shoulder 63 with which they icooper'ate. The initial movement of the control lever 40 is thus effective in disengaging the automatic stopping means and permitting the continued operation of the lever 40. On fnrthertravel of the lever 51 as the lever 40 continues in its movement towards starting position and after the disengagement of the actuating and actuated parts of the trip mechanism, the lugs 53 engage the lugs 50 on operatingshaft 42 so that the latteris rotated in a clockwise direction to the position shown in Fig. 5. The link 43 which is concrank-shaft 01' course rotates the crank pin on the plate 68 so that coinoidently with the downward movement of the slide 21, the ink 4% moves downwardly and swings the trip carrier 5'? to the position shown in dotted lines in Fig. 5, while the head d9 of the actuated member remains in the iull line position shown nthis figure in which position it will he observed there is considerable space he tween the lips or shoulders 62 or" the actuating part and the shoulder 63 of the actuated part if}. 7 During the upward movement of the slide the link 4% is raised by the crank pin. The trip carrier again swings upwardly carrying with it the actuating part- 61, and during the la ter part of this upward movement the shoulders 62 of the actuating part engage the she ilder of the actuated part and returns the letter to its initial position as shown in Fig. i. thereby disengaging the clutch and stopping the press. The preceding sequence of operations take place in the manner indicated it the operator has immediately released the operating handle after he has moved it into the press starting position 40 Upon its. release the operating handle s0 is moved by the weight 56 through a small travel suificient to restore the lost mo tion between the

lugs

53 and 50, the weight being insuiiicient however to cause any movement of the operating shaft a2. The weight 56 in urging the lever 40 towards stopping position is therefore effective in causing the retraction of the locking pin 66 since as the lever 51 is moved in a counter-clockwise direction hy the weight 56, see Fig. 4, the end of tuc pin will be withdrawn from the path of the block 92 onthe actuat'ng part, and permit the engagement of theshoulders 62 and (S3 at the nro r time to shaft to press sto oping 'lide meniher of the press is 0 make one complete cycle l as the crank-shaft rotates cycle or o erations with the slide at the upper portion of its stroke so that access is permitted blank and formed work. If the operator desires to stop the press manually the control mechanism is such that he is permitted to do this at any time'in the cycle of operations of the press since movement of the lever 40 to press stopping position is effective through the lugs 52 and to cause the rotation of the operating shaft 42 which is connected to the brake and to the clutch, without interference from the actuating part 61. Similarly he can cause the starting oi the press regardless of the position of the trip actuating part 61 since the initial movement of the handle 40 produces a motion of the unlocking pin 66 to disengage the trip actuating part 61 if that part is in the position shown in Fig. in engagement with the actuated part 49.

The control iechanisin in accordance with this invention is such that it the operator should for a reason retcin his hold upon the control lever l0 alter h s hcen moved into H e starting position 1' the automatic trip mechanism will never ess cause the stopping of the press at the end of one cycle of operations and cause the return of the control lever to its starting position. Tl is insures that the press will not repeat its stroke even if the operator should ahsent-mindedly llOlt the lever elll in the starting position or tail to c ac iuated part of the mccln ani operator holds the operat- "ever i the starting position i0 after the pres has een placed 11 opeiution the trip ri -l e trip actuating part 61 downwarcl" 'ng-pressed plunger (is holdi -ing part- 61 to the left in F l with the dog held against the stop 96 on the carrier so that the shoulders 62 are in position to engage the shoulder (33 on the trip actuated part a then upon its return upward movement the .pper face of the sliding hlocl 92 will engage the underside or the e unlocking pin 66 which pin is still n its tor varo or unlocltin position pro- 7 from the side of th act atcd part 49. ver owing to the sliding and yielding ot' the block 92 on the trip actuating 61 the block will slide downwardly as the trip actuating part 61 rises, until the shoulders engage the shoulder 63 onthe part 49. T he parts will then be in the position i shown n Fig. 5; and then upon continued upwardmovement of the trip actuating part around the axis of the operating shaft l3 t actuating art will rock the actuated part on th si t in a couru s t ;p the press. ti o same time forcibly moving the lever 0 from the starting to the stopping or inoperat' c po on. The wei ht 56 will then tause the restoration of the lost motion hetween the lugs and 53 or else the lever 40 may be manually returned to its normal inoperative position to cause the retraction of the unlocking pin 66 and .iermitthe spring-pressed block 92 to move into its normal position as shown in Fig. a re dy to he engaged by the unloc ting pin upon further movement or the press starting lever =11.- when the operator again desires to start the press.

From the foregoing it will be perceived that the operator cannot maintain the press in operation merely by holding the operating handle in the press at 'ng position, some furthe r and conscious act of the operator being entailed when he desires the press to continue in its operation. The press may however he r-clockwis;

e placed in continuous operation by disengaging or disabling the automatic trip mechanism. This may be done by locking the trip actuating part 61 in an inoperative or ineffective position so thatitcannot engage the shoulder 63 of the actuating part. The actuating pa-rt is locked in this position so that, although it is moved with the trip c rricr 57 as the latter is operated by link at, it will be held over against the boss 65 and away from head 4-9 of the trip actuated member and thus be pre vented from engaging the latter. he actuating part (31 is so held by means of a locking pm (5%), provided on the trip carr er 5", see

Fig. 3, which may bcturned and permitted to drop under the action of a suitable spring,

"into a hole formed in the side of the part 61. The dog 95 forms a handle by means of which the trip actuating part 61 may be conveniently lifted so that it may be locked in its inoperative position. i flhen the automatic stopping mechanism is disengaged by holding the spring-pressed actuating partGl in an inoperative position the press Will continue in operation until it is stop ed by the operator. The manual control lever l0 may be operated ianually at any time in the operation of the press to effect the manual control press.

While the form of apparatus herein described constitutes a preferred embodiment of the invention, it is to be understood that the invention is not limited to this precise form 0t apparatus, and that changes may be made therein without departing from the scope/of the invention which is defined in the appended claims.

lVhat is claimed is:

1. In a power press, aslide member mounted for reciprocation therein, a driving memher, a driving connection including clutch means operable When engaged to operatively conne it said members and releasable to disconnect said members, manual means including an operating lever operably connected at all times to the driving connection to permit the manual starting and etc iping of the press, at any time in its cycle of operation, means responsive to the movements of the slide member and automatically operable to engage the driving connection and overcome manual pressure on the operating lever so as to stop the the press at-a predetermined point in its cycle of operation, and means operated by initiamovement of said operating lever towards starting position to disconnect the engagement of said automatically operable means to permit the manual starting of the press.

2. In a power press,-a slide membermounted for reciprocation therein, a driving member, ,a driving connection including clutch means operable when engaged to operatively connect said members and releasable to disconnect said members, manual mes is includmg an operating lever operably-connected at all times-to the d-rivmgconnection to permit the manual starting and stopping of the press at any time in its cycle of operation, a rock memberresponsive to the movements of the slideineinbei' and automaticallyoperable to overcome manual pressi'ire on the operating. lever so as to stop the press at a predetermined point. in its cycle oi operation, means operated by initial movement oi Lid operating lever towards starting position :to disconnect the engagement of said automatically operable means, and means manually adjustable for disabling said automatically operable means to per nit the'continued operation of the press.

8. In a pow member adap on t be connected with said h'iving shaft and to be driven thereby, and mechanisn'rfor controlling the-conncction oi the slide member n ith the driving shaft comprising a reel; member adapted to be moved into starting position to operably connect the slide member with the dririn shaft and to be moved to a stopping position to disconnect the slide men'iber from the driving sliaft, a control lever manually operable at any time "tor controlling said rock member and corn nected to said rock member through a lost s, a driving shaft, a slide tit) mounted with said rocl: member, an actuating part connected to said slide tobe oscillated as said slide reciprocates, and adapted to en gage said actuated part andovercome manual pressure on said control lever to move said rock member and control lever .to stopping position at 'a predetermined time in the cycle, otoperation, and means operable by the initial starting movement of said control lever for releasing the engagement of the said parts, said parts having provision permitting their effective engagement when the control lever is held in the starting position.

4. In a power press, a drive member, a crank-shaft, a cl u-tch ctiveen said drive member and crank-shaft, a brake operating means, a rock shaft connected to the clutch and the brake operating means, a root: liltillikll' mounted on said shaft, a rod connected to said roclt member and reciprocally operable by said crank-shaft, a hand control lever capable of manual operation at any time in the operation of .the press to efiect the manual starting or stopping of the press, an intermediate controlpart fast on said shaft and conneeted through a lost motion to the control lover, a spring-pressed actuating part mov --ably mounted ion said rock member, an-actuated part adaptedto be engaged and mover by said actuating part and mounted on said lit rangement being uch that initial movement of the hand control lever from the stopping position is first effective in causing the disengagement of the actuating and actuated parts to permit the continued operation of the hand control lever for the engagement of the clutch and the release of the brake, said parts having provision permitting their engagement to automatically stop the press when the hand control lever is nianually held in the starting position.

5. In a power press, a slide nien'iber mounted for reciprocation therein, a driving memher, a driving connection including clutch means operable when engaged to operatively connect said members and releasable to disconnect said members manual means including a single manual operating lever pivotally mounted on said press for movement in a single plane and operably connected at all times to the driving connection to permit the man ual starting and stopping of the press at any time in its cycle or" operation, means responsive to the movements of the slide member and. automatically operable to engage the driving connection and overcome manual pressure on the operating lever so as to stop the press at a predetermined point in its cycle of operatioin and means operated by initial movement of said operating lever towards starting position to disconnect the engagement of said automatically operable means to permit the manual starting of the press.

In testimony whereof I hereto atlix my signature.

ARTHUR A. BYERLEIN.