Патент USA US2404611код для вставки
~J11!ly23,.1946. BDASHBAUGH , I I 2,404,611 BOOSTER RAM ADJUSTMENT I ~ Filed March 9, i945 "18~ 36 24 INVENTQOR 2 BY 58 ‘ ‘. "ATTORNEY _ f Patented July 23, 1946 2,404,611 . UNITED STATES PATENT OFFICE 2,404,611 BOOSTER RAM ADJUSTMENT Bernard D. Ashbaugh, Mount Gilead, Ohio, as signor to H-P-M Development Corporation, Wilmington, Del., a corporation of Delaware Application March 9, 1945, Serial No. 581,827 7 Claims. (01. 60--97) 1 This invention relates to ?uid operable presses opposite end which is reciprocable within the cyl and,‘ particularly, to ?uid operable presses having inder 26. a reciprocable main ram and a. booster ram. ' The cylinder 26 comprises a ?anged member It is often desired to close the movable platen adapted for being received within the bed plate of a press against the ?xed platen at a rapid 5 22 of the press base 24; The bed plate 22 is suitably connected with the strain rods I2 and rate and thereafter to- perform work ‘with it at a reduced rate. This is often accomplished by I4 so that a rigid structure results. 7 ' means of a booster ram which is generally ?xed in the head of the press and extends into a bore The ram I6 is bored as at 26 and reciprocably receives a booster ram 28 which is bored'and in the main pressing plunger. Then, the fast movement of the platen is accomplished by ad mitting fluid to the booster area While the re threaded at 30 for receiving the threaded rod 32 which is rigidly attached to the closed end of the cylinder 20 by means of the shoulder 34 an duced speed pressing stroke is accomplished. by nut admitting ?uid to both the booster ram and the 36. y _ ‘ 7 The ram 28 is provided with a plurality of axial main ram. bores 38 which communicate the bore 30 with the In order to accommodate for different lengths of fast travel, means are provided for accomplish ing the admitting of pressure to the main plunger at a predetermined point in the travel of the press platen. This is commonly accomplished by means of valving operated by the press platen and operable to interconnect the said areas. The necessary conduits and valves to accomplish this upper end of the bore 26. The bore 26 in turn: is connected by means of a plurality of inverted L shaped passages 40 with the space :beneath the piston I8. Fluid communication is thus had at 20 all times between the upper end of the ram 28 I and the bore 30 and, when the ram I6 advances upwardly a predetermined amount,‘ between the upper end of the bore 26 and the lower end‘of the cylinder 20. The ram 28 is also bored centrally for receiving a rod 42 which is slidably keyed to the said ram by a key 44. The rod 32 passes upwardly through shift-over of pressure are expensive and require time and labor to install on a press. Further more, the additional hydraulic connections are subject to failure and require care and service to maintain them in good operating condition. It is a primary object of the present invention the packing 4‘6 and extends into a recess 48 in the platen ID. Attached to the upper end of the to provide in a press having a booster ram a 30 rod 42 within the recess 48 is a ‘bevel gear 50 means of shifting over from the fast closing stroke to the pressing stroke which does not involve extra valves. ‘ which is engaged by the bevel gear 52 on' the inner end of the rod 54. The rod 54 is jo'urnalled on the spaced bearings 56 and has a hand wheel . It is another object to provide an arrangement 58 attached thereto externally of the platen I0. Fluid communication is had with the upper side of the piston I8 through the conduit 60 while a check valve 62 is adapted to permit ?uid according to the foregoing object in which the length of the fast closing stroke may be adjusted. It is still another object to provide an arrange ment according to the foregoing objects in which to pass from the frame or reservoir 24 into the the adjusting means for the booster ram is read lower end‘ of the cylinder 20 through the pas ily accessible. ' 40 It is still another object to provide a booster ram and adjustment therefor for an upward act ing press plunger in which the adjusting means sage 64. ' A valve 66 is also connected with the lower end of the cylinder 20 and is adapted to connect ‘ the cylinder 20 with the reservoir in response to a predetermined pressure conducted thereto is readily accessible. 7 These and other objects and advantages will 45 by the conduit 68 which is connected with the become more apparent upon reference to the ac companying drawing, in which: Figure 1 is a vertical section through an up ward acting press plunger having a booster ram and adjustment according to this invention; Figure 2 is a similar view but showing the press in its closed position; and Figure 3 is. a plan view taken on the line 3-3 of Figure l and showing a portion of the mech anism. . . Referring to the drawing, there is shown a press platen I 0 adapted to slide vertically on the strain rods I 2 and I4 and having connected there with the ram I6 which has a piston I8 on its upper surface Of the piston I8. ' Pressure ?uid is delivered to the booster plunger through a bore 10 in the threaded member 32 which communicates through a bore ‘I2 with a 50 conduit ‘M. In operation, pressure ?uid is delivered to the conduit ‘I4 while the conduit 60 is connected with exhaust. The fluid from the conduit 14 passes through the bores 72, ‘I0, 30 and 38 to the upper 55 end of the bore 26 and advances the plunger I6 and platen It rapidly into position where the members 16 and ‘I8 are about to close. Im mediately prior to the closing of the said members the bores 40 communicate with the space above 60 the booster ram and pressure ?uid is delivered to 2,404,611 4 munication between said rams in response to a _ the lower surface of the piston H3. The ram and predetermined advancing movement of said main platen then advance the member 16 against the member 18 at reduced speed and increased pres sure. 7 Should the members 76 and 18 be replaced by other work members having different dimensions, the hand wheel?lirmay be adjusted so that the. booster ram 28 is rotated and threads in one" ram and platen, and means for axially adjusting said booster ram comprising rotatable shaft means operatively connected with said booster T ram and extending through said mainram and said platen. 5. In combination in a press, a platen, a cylin direction or the other on the member 32.v This ' der, a main ram reciprocable in said cylinder for will vary the point of travel of the platen at 10 reciprocating said platen, a bore in said main which pressure ?uid is delivered to the .main pressing area and, therefore, vary thelength of the rapid closing stroke. ' ' The location of the hand wheel 58 in the platen I0 is particularly advantageous in that it permits the operatorv to obesrve the work members in the press while adjusting the booster ram. Further more, all external valves and conduits are elimi nated and the press structure is thereby simpli ?ed and made more economically. While this invention has been'illustrated' and 7 described in connection with an upward acting press ram, it will be understood that its utility is ram, a booster'plunger' reciprocably mounted in said bore, a threaded bore in said booster ram, a threaded rod carried by said cylinder and extend; ing into said threaded bore, means to admit ac tuating ?uid to said booster ram, passage means in said main ram‘for effecting ?uid communica tion between said rams in response to a prede termined relative movement thereof, and means for axially adjusting said booster ram for chang ing the amount of said predetermined relative movement comprising a shaft extending axially through said main ram slidably keyed to said booster ram and a shaft extending transversely not limited to that type of press but may be em through said platen and in operative engagement ployed on a horizontally or vertically acting press I with said ?rst mentioned shaft. ram as well. It will be understood that I desire to comprehendv such modi?cations as may be con sidered to come within the scope of the appended 6. In combination in an upward acting ?uid operable press, a press bed, a press cylinder car ried by said bed, a‘main ram reciprocable in said cylinder, a platen carried by said main ram, a bore in the lower end of said main ram, a booster plunger reciprocably mounted in said bore, a rod carried by said cylinder and screw threadedly en~> gaging said booster ram for supporting the same, passage means in said main ram for effecting ?uid communication between the advancing areas of said rams in response to a predetermined ad vancing movement of said platen and main ram, claims. ~ I I claim: 1. In combination in a ?uid operable press, a platen, a main ram attached thereto for recipro eating the same,_a booster ram for augmenting the speed of said platen in one direction of move ment thereof, means of, admitting actuating ?uid ‘ to said booster ram, means responsiVe to a pre determined relative movement of said rams to connect said rams hydraulically, and means car ried by said platen and extending through said ‘ ' means for admitting actuating ' ?uid to said booster ‘ram comprising passage means in said main ram and into engagement with said booster 4.0 cylinder, said rod and said booster ram, and means for axially adjusting :said‘ booster ram rel ram for adjusting the position thereof relative to ative to said main ram comprising a ?rst shaft said main ram. slidably keyed to said booster ram and‘ extending 2. In combination in a ?uid operable press, a axially through said ‘main ram and into said platen, a main ram connected with said platen for reciprocating the same, a booster ram extend 45 platen», a second shaft geared to said ?rst shaft and extending laterally outwardly through said ing into said main ram for augmenting the speed platen,- and means for rotating‘said' second shaft of said platen in one direction of movement there whereby said booster ram may be threaded‘ in of, means for admitting actuating ?uid to said either direction on its supporting rod. . booster ram, means responsive to a predetermined '7. In combination in a press, a press platen, a movement of said main ram and platen for ad 50 main ram attached thereto, a bore in said main mitting actuating ?uid to said main ram, and means carried by said vplaten ' and extending ram'opposite said platen, a booster ram recipro cablyimounted‘in said bore, a threaded recess in the end- of said booster ram, a stationary threaded of said booster‘ ram relative to said main ram. 3. In combination‘ in a ?uid operable press, a 55 rod adapted for engaging said threaded recess thereby to support said booster ram, means ex reciprocable platen, a main ram attached'thereto tending through said rod and booster‘rarn to sup for reciprocating ,the same, a cylinder within ply actuating ?uid to said booster ram, passage which said main ram is reciprocably mounted, a means in said main ram for effecting ?uid com booster ram adjustably carried by said cylinder munication between said rams in response to a . and extending into said main ram,v means to ad predetermined relative movement thereof in the ' mit actuating ?uid to said ‘booster ram, passage advancing direction, and means for rotating said means in said main ram adapted in response to booster ram relative to said rod to'e?’ect axial a predetermined advancing movement of said shifting of said booster ram- comprising a' ?rst main ram to effect ?uid communication between said rams, and means carried by said platen and 65 shaft slidably keyed to said booster ram and ex through said main ramfor adjusting the position extending through said'main ram for axially ad jus'ting said booster ram. ’ ‘ ' 4. In combination in a ?uid operable press, a platen, a main ram attached to said platen, a cyl inder, within which said main ram is reciprocable, a bore in said main ram opposite said platen, a booster ram screw threadedly carried by said cyl inder and extending into said bore, means to ad mit actuating ?uid to said booster ram, passage means in said main ram for effecting ?uid com tending-axially through said main ram and into said platen, a recess in said, platenfor receiving the end of said ?rst shaft, a second shaft extend ing laterally through said platen and into said 0. recess, gear means connecting said shafts and hand Wheel means connected with the outer end of said second shaft whereby rotation thereof is effective to rotate said/booster ram and, there fore, axially to shift the same. ' ' ' BERNARD D. .ASHBAUGH.v .