US1773548A - Metal-working press - Google Patents

Description

Aug. 19, 1930. F. J. RODE 1,773,548

METAL WORKING PRESS Filed Aug. 16, 1929 3 Sheets-Sheet l 5 Sheets- Sheet 2 F. J. RODE METAL WORKING PRESS Filed Aug. 16, 1929 Y Q a g ETWWWI W Aug. 19, 1930.

Aug. 19, 1930. F. J. 'RODE 1,773,548

METAL WORKING PRESS Filed Aug. 16, 1929 3 Sheets-Sheet 3 Patented Aug. 19, 1933 FREDRICH J. RODE, OF CHICAGO, ILLINOIS mn'ranwonxme rnnss Application filed August 16, 1929. Serial No. 386,409.

This invention relates in general to metal working presses, particularly adapted, though not necessarily liinitedin its use, in connection with sheet metal die presses in which the work is operated upon between two cooperating dies, one of which is reciprocable 5 toward and away from the other.

It is sometimes desirable and at other times necessary to adjust or vary what is generally known as the die space of the press, that is thespace between the bed of the press and the reciprocating ram. This has usually been accomplished by providing an adjustment in the connecting rod of the press which is 10- 5 cated between the rain and the "crank shaft. While good results may be accomplished with such construction, the results are not entirely satisfactory for many reasons, among them being that the degree of adjustment is limited and considerable time and labor is required.

Furthermore, with the usual construction considerable damage often results when the ram is interrupted in the full extent of the movement thereof to which it has been adjusted.

It is one of the objects of thepresent invention to provide in a press of this character improved means whereby a high die space an adjustment may be readily obtained without the usual adjustment in the connecting rod of the press. A further object is to provide improved means whereby the connecting rod will be arranged between two slides, one above and one below the connecting rod, the slides being connected together in a manner that thestress exerted upon the connecting screws between the slides will be distributed to and exerted perpendicularly or in a straight line upon the threads of the connecting screws and not diagonally as heretofore, thereby avoiding stripping and breaking of the'thre'ads, and

at the same time through the medium of such screwsor connections there will'be' provided four points of power distribution, upon the ram, instead of a single point of pressure as now employed.

A further object is to provide improved safety means for determining the load upon the press and which safety means will, under abnormal conditions, yield to prevent damage to the parts of the, press.

To the attainment of these ends and the ac complishment of other new and useful obj ects as will appear, the invention consists in the features of novelty in substantially the construction, combination and arrangement of the several parts hereinafter more fully described and claimed and shown in the accom-- panying drawings illustrating this invention, and in which Figure 1 is a side elevation of a press of this character constructed in accordance with the principles of this invention.

Figure 2 is a vertical sectional on line 22, Figure 1.

Figure 3 is an enlarged detail sectional view taken on line 33, Figure 2.

Figure 4 is a sectional view taken on line 4-4:, Figure 1.

Figure 5 is an enlarged detail sectional view taken on line 55, Figure 1.

view taken,

Referring more particularly to the drawings the numeral 10 desi nates generally the bed of a press of any desired or-suitable construction upon which a die 11 is mounted. Rising above the bed plate 10 are spaced 11prights 12 and journaled in suitable bearings v 13 is a crank shaft 14 having a crank arm 15. The crank shaft is rotated in any suitable manner such as by'means of a gear 16 with which another gear 17 meshes and this gear 17 is connected with a shaft 18 having a fly wheel 19 and fast and loose pulleys 20-21 thereon.

If desired a brake band pulley 22 may be provided on the crank shaft with which a suitable control brake band 23 co-operates.

All of the above referred to parts are of the ordinary and well known construction.

- Mounted to slide between suitable guides 24 on the uprights 12 is a ram 25 which has connected with it a die 26 that co-operates with the die 11 and between which dies the work 27 to be operated upon is arranged.

'The ram 25 is provided with pro ecting portions 28 which move between the respective guides 24 and the ram is provided with ber of which may be provided, preferably four.

Rotatably' mounted in each of the bearings 29 is one end of an upright shaft 30, each of the shafts being threaded as at 31 at one end thereof. The other end of each of these shafts is provided with a shoulder 32 seated in a recess or socket 33 of the bearing 29. A nut or member 34 encompasses the shaft and is threaded into the socket or recess 33 to engage the upper portion of the shoulder32 and to co-operate with the seat 33 for holding the shaft against longitudinal displacement but supporting the same for free rotation in the bearing.

The extremity 35 of each of the shafts 30 projects beyond the respective bearings 29 and connected to the projecting end thereof is a collar 36, ball bearings 37 being disposed between the collar 36 and the face of the bearing 29 so as to facilitate rotation of the respective shafts 30 in their bearings.

Connected with the crank 15 of the shaft 14 is a connecting rod 38 having a semi-circular bearing 39 in which the crank 15 rests. A cap member 40 having a semi-circular bearing therein cooperates with the bearing member 39 and these parts are secured together by means of bolts or fastening devices 41. any number of which may be provided. These fastening devices are preferably each provided with a head 42 which rests against one of the bearing members and a nut or collar 43 threaded upon the other end thereof to rest against the other bearing member for clamping these parts together. These fastening devices 41 are each provided with a weakened portion 44 adapted under normal conditions to hold the bearing members in cooperative relation but under abnormal conditions to break or become destroyed so as to permit the bearing members 3940 to separate.

Any suitable means may be provided for yieldingly holding the bearing member 40 from dropping out of position when the fastening members 41 have been destroyed. A suitable and efiicient means, however, embodies a bolt or member 45 which passesloosely through the bearing member 39 and is threaded into or otherwise attached to the bearing member 40 as at 46. A recess 47 is provided in the bearing member 39 through which the member 45 passes, and is of a diameter considerably larger than the diameter of said member so that a coiled spring 48 which encompasses the member 45 will enter the socket, one end of'the spring resting upon the bottom of the socket and the other engaging-"a shoulder or head 49 on the member 45.

The stress of the springs 48 is such that it will maintain the bearing member 40 against dropping out of position when the members 41 are destroyed.

Any suitable number of these supporting means may be provided.

The connecting rod 38 may be of any desired configuration but is preferably bifurcated at its free end so that the arms of the bifurcation will enter suitable recesses 50 on opposite sides of a web 51 in a head or member 52 and a pin 53 loosely connects the ends of the connecting rod 38 with the head or member 52.

A portion of the head 52 may be reduced as at 54 to form bearings movable in guideways 55 on the uprights 12 so that as the crank 15 is rotated the head or member 52 will be reciprocated in the guides 55.

The head or member 52 is provided with a plurality of split threaded bearings 56, one for the threaded ends of each of the upright shafts 30, and through which bearings the shafts 30 pass so that the threads on the re: spective shafts will have engagement with the threads in the respective bearings 56.

Fastening devices 57 are provided for clamping the bearings about the respective shafts.

Thus it will be seen that when the crank shaft 14 is rotated a reciprocatory movement will be imparted to the member or head 52 and as this head or member 52 is connected with the ram 25 through the medium of the threaded rods or shafts 36 the ram will be this abnormal condition, considerable dam-.

age will result. Therefore, the cap 40 being supported in position by the fragile or dest-ructible fastening member 41 will permit or cause this abnormal condition to be overcome. With this construction it will be manifest that as soon as the ram is arrested in its movement the crank 15 will continue to rotate and will exert an abnormal stress upon the member 40 of the crank bearing. This stress, however, will-be overcome by reason of the fact that under such conditions and when the crank 15 rotates further, it will exerta suflicient stress upon the member 40 of the crank bearing to destroy or break the fastening members 41, thereby causing the cap member 40 to yield.

When the members 41 are destroyed, the cap member 40 will be held against dropping out of position by the springs 48 and co-oper ating member 45'. The springs 40 will yield so as to permit the cap 40 of the crank bearing to yield sulficiently to permit the crank 15 to complete its cycle of rotation.

When it is desired to vary the die space by adjusting the ram with respect to the crank 15, itis only necessary to rotate the shafts 30 and as these shafts are rotated and by reason of their threaded connection with the head or reciprocating member 52 it will be manifest that the ram will be raised or lowered with respect to such head according to the direction of rotation of the shafts 31.

Any suitable means may be provided for thus adjusting these parts, and this may be accomplished either by hand or by power.

To that end there may be provided a motor 58 mounted upon a suitable support 59 on the press. The motor may be controlled by means ofa suitable switch 60.

Connected with the shaft of the motor is a gear61 which meshes with a gear 62 journaled in a suitable bearing 63.

An upright shaft 64; passes loosely through the gear 62 and is' connected thereto for rotation therewith but for longitudinaladjust-- ment with respect to the gear 62 preferably by means of a feather connection 65.

The lower end of the shaft 64 is ournaled in a suitable bearing 66 and connected with the shaft 64 for rotation therewith is a gear 67 which meshes with a gear 68 secured to a shaft 69'for rotation therewith, the shaft 69 being journaled in suitable bearings 7 0 mounted by and carried with the ram 25.

Connected with each 'of the shafts 30 for I rotation therewith are gears 71preferably of the worm type. Connected also with the shaft 69 for rotation therewith are gears 72 also preferably of the worm type. Each of the gears 72 is arranged between arid meshes with the gears 71 of a pair of shafts 30 and the connecting gears on the respective shafts are so arranged that the shafts when rotated will rotate in the same direction.

Thus it will be seen that when the motor 58 is rotated the gear 62 and shaft 64 will be rotated. This .rotary motion will be communicated through the intermeshing gears 6768 to the shaft 69 and from the shaft 69 through the respective intermeshing gears 72-71 to the shafts 30ior rotating the latter, so that the ram 25 may be adjusted with respect to the crank shaft 14.

If desired and in order to provide a manual adjustment forthe ram, the motor 58 may be dispensed with, or when the motor is idle the shaft 69 may be rotated by means of a suitable crank or tool adapted to be connected with the end 73 of the shaft 69.

With this improved construction it' will.

be manifest that the desired adjustment of the die space in the press may be obtained and furthermore the press will be maintained against injury under any abnormal condition or any excess resistance pressure exerted upon the ram by reason of-the fragile or breakable connecting pins or members 41 between thg bearing members 3940.

By the provision of the four shafts 30 and thearrangement of the connecting rod between the ram and the reciprocable head or slide 52 there will be an equal distribution of the stress upon all of the threaded shafts 30 1n a perpendicular direction or straight line, thereby avoiding the diagonal strain heretofore produced when the adjustment means is provided in the connecting rod of the press, and with the present invention all danger of breaking the screws or stripping the threads A maintained in its originally set position with respect to the work-supporting surface in every position of the ram during the cycle of operation of the press. This is advantageous because it renders it possible to place dies in any position under the ram, and the stress exerted by the bringing together by the male and female members of the die so placed, will not permit the lower surface of the ram to be tilted or moved out of a horizontal position.

While the preferred form of the invention has been herein shown and described, it is to be understood that various changes may be made in the details of construction and in the combination and arrangement of the several parts, within the scope of the claims, without departing from the spirit of this invention.

What is claimed as new is 2-- 1. A press of the character described embodying a crank shaft, a,reciprocable ram, means connecting the ram with the crank shaft, means whereby the ram may be adjusted with respect to the crank shaft while the extent of throw of the ram by the crank shaft remains constant, a portion of said crank being sectional, and means destructible under abnormal working conditions of the press whereby said sections will yield, one with respect to the other.

2. A press of the character described emon one side of the shaft, a connecting rod be tween said shaft and member, a reciprocable ram on the other side of the crank shaft, and

means connecting said ram with said member for adjustment with respect thereto, whereby theposition of the ram with respect to said member may be varied while the extent of throw of the ram by said crank remains constant.

3. A press of the character described embodying a crank shaft, a reciprocable member on one side of the shaft, a connecting rod between ,said shaft and member, a reciprocable ram on the other side of the crankshaft,

means connecting said ram with said member for adjustment with respect thereto, whereby the position of the ram with respect to said member may be varied while the extent of throw of the ram by said crank remains constant, and means for adjusting the ram with respect to said member at will.

4. A press of the character described embodying. a crank shaft, a reciprocable member, a connecting rod between said member and crank shaft, a reciprocable ram, and upright reciprocable screws carried with said ram. and having threaded connection with said member, whereby said ram and said member may be relatively adjusted one towards and away from the other,-to vary the relative positions of the ram and member while the extent of throw of the ram by said crank shaft remains constant, said crank and connecting rod being disposed between the ram and saidreciprocating member.

5. A press of the character described em bodying a crank shaft, a reciprocable member on one side of the shaft, a connecting rod between the shaft and member, a reciprocable ram on the other side of the crank shaft, vertically disposed rods forming connections between said ram and member and being rotatably supported by one and having threaded connection with the other, whereby the relative position of the ram and member may be varied while a fixed throw of the ram by said crankshaft will be maintained, and means for rotating said vertical rods.

6. A press of the character described embodying a crank shaft, a reciprocable member on one side of the shaft, a connecting rod between the shaft and member, a reciprocable ram on the other side of the crank shaft, vertically disposed rods forming connections between said r-am and member and being rotatably supported by one and having threaded connection with the other, whereby the relative position of the ram and member may be varied while a fixed throw of the ram by said crank shaft will be maintained, and means common to said vertical rods for simultaneously rotating them.

7 A press of the character described embodying a crank shaft. a reciprocable member on one side of the shaft, a connecting rod between said member and shaft, a reciprocable ram on the other side of the crank shaft, vertical suspension rods connecting the ram with said member, said rods being rotatably supported by one and having threaded connection with the other, whereby the position of said ram with respect to said member may be varied, and means for rotating the said suspension rods to relatively adjust the ram with respect to said member. 8. A press of the character described embodying a crank shaft, a reciprocable member on one side of the shaft, a connecting rod between said member and shaft, a reciprocable ram on the other side of the crank shaft, vertical suspension rods connecting the ram with said member, said rods being rotatably supported by one and having threaded connection with the other, whereby the position of said ram with respect to said member may 7 be varied, and means common to said suspension rods for simultaneously rotating them to relatively adjust the ram with respect to said member.

9. A press of the character described embodying a reciprocable support, a reciprocable ram spaced therebelow, suspension rods rotatably connected with one and having adjustable connection with the other whereby upon the operation of the rods the relative positions of the member and ram may be varied, a crank shaft between said ram and member, and a connecting rod between the crank and said member.

10. A press of the character described embodying a reciprocable support, a reciprocable ram spaced therebelow, suspension rods rotatably connected with one and having adjustable connectionwith the other whereby upon the operation of the rods the relative positions of the member and ram may be varied, a crank shaft between said ram and member, a connecting rod between the crank and said member, and means common to the suspension rods for simultaneously operating them to effect the said relative adjustment of the ram and said member.

11. A press of the character described embodying a reciprocable ram having a fixed throw, a crank shaft, a connecting rod between said shaft and ram, and means whereby when the movement of the ram by the crank is arrested, the crank Will continue in its same direction of movement and independently of the ram, the said means embodying an element destructible under the stress exerted by the resistance to the movement of the ram.

12. A press of the character described embodying a reciprocable ram, a crank shaft, a rod connection between the crank and shaft, said connection embodying separable co-opcrating elements, means securing said ele- -ments together, the said means being rendered inactive under the stress created by resistance to the movement of the ram by said crank before the ram reaches the limit of its operative movement by the crank, and resilien t means for maintaining the said elements in proximityto each other when the first said means is rendered inactive.

13. A power press provided with a work supporting surface, a reciprocable ram, guiding means for the ram, a die connected with said ram, driving inechanism for the ram, means operatively connecting the ram with the said driving mechanism, the said connecting means disposed entirely above the activeface of the die and operating to exert pressure from the said driving means upon ing means for the ram, a die connected with said ram, driving mechanism for the ram-, means operatively connecting the ram with 1 the said driving mechanism, the said connect 1 ing means being disposed entirely above the active face of the die and operating to exert pressure from the said driving means upon the ram at separated points on opposite sides of a center line intermediate and parallel with the front and rear edges of the ram, means other than the said guiding means for maintaining the ram against tilting movement, whereby the lower face of the ram will be always maintained in its originally set position with respect to the said supporting surface in any position of the ram during the cycle of operation of the press.

15. A power press provided with a work supporting surface, a reciprocable ram, guiding means for the ram, a die connected with the said ram, driving mechanism for the ram, means operatively connecting with the said driving mechanism, the said connecting means being disposed entirely above the active face of the die and operating to exert pressure from the same driving means upon the ram at four points spaced from each other, means otherthan said guiding means for maintaining 'the'ram against tilting movement, whereby the lower face of the ram will always be maintained in its originally adjusted position with respect to the said supportlng surface in any position of the ram during the cycle of operation oithe press, and means for varying at will the distance be tween the said work supporting surface and the active face of s'aiddie.

16. A power press provided with a work supporting surface, a reciprocable raml guiding means for the ram, a die connected with the said ram. driving mechanism for ram, means operatively connecting the ram with the said driving mechanism, the said connecting means being disposed entirely above the active face of the die and operating to exert pressure from the said driving means upon the ram at four points spaced from each other, means other-than the said driving means for maintaining the rain against tilting movement, wherebv the lower face of the ram will be alwavs maintained in its originally adjusted position with respectto the said supporting surface in any position of the ram during the cycle of operation of the press, and means whereby the distance between the lower face of said die with respect to the driving mechanism may be varied at Will.

U 17. A power press provided with a work supporting surface, a reciprocable ram, guiding means for the ram, a die connected with said ram, driving mechanism for the ram, means operatively connecting the ram with the said driving mechanism, the said connecting means being disposed entirely above the activeface of the die and operating to exert pressure ifro mthe said driving means upon th am atseparated points on opposite sides er line gintermediate and parallel w he'i front and rear edges. of the ram,

means other than the said guiding means for maintaining the ram and the said connecting means against tilting movement, whereby the lower face of the ram will be always maintainedin its originally set position with respect to the said supporting surface in any position of the ram during the cycle of operation of the press.

18. A power press provided with a work supporting surface, a reciprocable ram, guiding means for the ram, a die connected with the said ram, driving mechanism for the ram, means operatlvely connecting the ram wlth the said driving mechanism, the said connect ing means being disposed entirely above the active face of the die, and operating to exert pressure from the said driving means upon the ram at four points spaced from each other, means other than the said guiding means for maintaining the ram and the said connecting means against tilting movement, whereby the lower face of the ram will be always maintained in its originally adjusted position with respect to the said supporting surface in any position of the ram during the cycle of operation of the press, and means whereby the distance between the lower face of the said die with respect to thedriving mechanism may beyaried at will.

In testimony whereof I have signed my name to this specification, on this 1st day. of

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