Патент USA US2121818код для вставки
June 28, 1938. P. H. NAST 2,121,818 PUNCHING MECHANISM Filed Dec. 3, 1934 2 Shéets-Sheet 1 mè., EN» www@ mw wm Èâ@ mmä ì V_ [72 van for: Ñ l $00k/ /í/Vaa? y June 28, 1938. P. H. NAST .2,121,818> PUNCHING MECHANI SM Fil'ed Dec. 5, 1954 2 sheets-sheet 2 l --m » I «mi» ën, ' A TTORNE 2,121,818 Patented June 28V, 1938 ¿ y UNITED A ’STATES PATENT orifice ‘i l f f 2,121,818v PUNGHING MEoHANIsM Paul H. Nast, Claremont, N. H., assignor to Sul , livan Machinery Company, a corporation of Massachusetts . ’ Application December~3, 1934, Serial No. 755,730 14 Claims. (Cl. 76-5) This invention relates to punching mechanism, and ,more particularly to inflprovementsV in a punching mechanism for reforming the bore of a tially on line 4--4 of Fig. 1. hollow ,rock drill steel or similar tubular articles. tially on line 5_5 of Fig. 2.> In hollow rockvdrill steels, and `similar tubular I articles, theborein the steel adjacent thebit and shank becomes deformed during the sharpening process, and it is often necessary to reform the hereafter the sharpeningprocess is completed. This reforming _operation is usually accomplished , by driving a punch pin with a .hammeringaction into?the steel bore to open and reform the bore. ‘. 'Frequently during this reforming operation, theV punch pin sticks in the, steel bore „and some diffi V culty is lencountered ineffectingreleaseA Vof the ’ punch pin from ,theusteeL ‘ Fig. 4 is a vertical sectional view taken substan , _ , ' i Fig. 5 is a cross sectional view taken- substan ’ Y Fig. 6 is a detail sectional View taken on line ï; 6-5 of Fig. 2. Fig. '7 is an enlarged vertical sectional View similar to Fig. 4 showing parts in a different position. _ , , ' Fig.Y 8 is a horizontal sectional view taken’sub 10 stantially on line 8-8 of Fig. 5. ' . Fig. 9 is a cross sectional view taken substan tially on line 9-9 of Fig._7. , ' - f Fig. 10 is a vertical sectional view taken sub, stantially on line IU--Iß of. Fig. 5. ì _ v g ` Fig. 11 Vis av horizontal sectional view taken ' A primary object of the present vinvention is to ' substantially on line ll-II of Fig. A5. Fig. 12 is an elevation >of the control valve. Inithisillustrative embodimentY of the _'„inven nism whereby the punch pinmay be driven with a hammering action into and out of the steel bore, tion, there is shown a punching mechanisnngen a» 1 provide an improved drill steel punching mecha. thereby to facilitate the bore reforming process. Another Vobject is to-provide an improved drill erally designated I, mounted on a suitablesup steel lpunching mechanism> having Van improved mechanism, generally designated 3, this support and clamping mechanism being generally the vrhammer mechanism vformdriving the punchvpin into` and outJ of .thedrill steel bore, „Yet another object isto. provideanimproved hammer mecha nism rfor peiîcussively actuatingV the _punch pin bothV during the hole> opening and withdrawal operations, the hammerrnotor percussively actu atingthe punch pin during withdrawal, thereby to leliminate _any possibility Vof a stuck pin. , Still another object is >to provide in a punching mecha- port 2 in juxtaposition with -a suitable clamping Y same as that described in myV copending applica. tion Serial No. 755,729, vi'lled of evendate'here with. . Supported between the jaws ofthe clamp ing mechanism 3 is a hollow rock YVdrill steell’4 having its bit 5 engaging a suitable stop andîposi tioning plate 6, the clamp mechanism and stop ~ plate maintaining the drill steel in „longitudinal , alinement with the punching mechanism so that `nism'of the above character improved means for the punching mechanism maybe fed with‘respect ieedingthe punching , mechanism toward and to the drill steel to effect reforming of the drill' steel bore upon completion of the steel sharpening process. >As the particular form of clamping from, the work and having embodied therein im proved. feed. control means'. ? >Yet _another object Iisto.provide an improvedV feedcontrol'meansV for mechanism and stop plate for vmaintaining the automatically reversingthe direction of ,feed upon drill steel in bore reforming position do not . completion: of- . the hole, opening function and specifically enter into~ this invention, and are clearly described in my copending application 4o mentioned above, further, description of the same - having associated therewithl improved means for varying' the range of feeding movement. These andother-objectsand.advantages.of the invention will, however, hereinafter-more fully appear. I-n-the accompanying drawings there is shown, for purposes `of’ illustration, oneform which th invention'mayvassum'e inV practice. “In thesedrawings,---'` ' y - ' - f Y - g f ~ » » - ` Figfl'isaplanview of'y the illustrative embodi »ment'of -the improved :punching mechanism, to herein is yconsidered unnecessary. Now referring to the improvedpunching mech anism I, it will be noted thatsecured to averti cal plane face 'l of the support 2, asby screws 8, is a frame 9 having parallel honizontaljguide ways I 0, I0 and supporting improved >control »means generally designated II. Mounted in the lframe guideways lû‘are vlateral, guides' I2, I2 formed on projections depending from the bot l i getherA withy fits' associated >supporting means. tom of the cylinder I3 of a punch pin hammer ' y 1 Fig. 2 is a side elevational ïviewof the'punching ing mechanism, generally designated I4. >This hammering mechanism is Yof the differential pis mechanismsho'wn in Fig.’ 1.Y j , Fig.,3iis‘an 4end elevational view of the punch ing mechanism shown" inA~ Fig. '1. , - ton, valveless type, and- the hammer motor -cyl inder I3 has a large bore I5ï and anralinedï‘re "55. » 2 2,121,818 duced bore lâ; and reciprocable in the bores of motor and communicating through a longitudi this cylinder a hammer piston il having a » nal supply passage Biiwith the pressure fluid large head i8 fitting the bore i5 and a reduced supply chamber 5e. Parallel passages 65, 65 com head i9 fitting the bore i5 and formed on a rear ward projection integral with the piston head i8. A punch pin 2li is secured by a suitable pin lock municate through radial ports with the reduced bore i6 at points substantially midway between the annular recesses S2 and 63 and through ports 65 with the forward end of the enlarged cylinder 2l to a cylindrical striking block 22 recìprocably mounted in a bore formed in the front motor bore l5. The enlarged cylinder bore I5 is pro head 23. The rear end of the motor cylinder ‘ videdY with a free exhaust passage B1 controlled by the hammer piston. When the control'valve 10 10 is closed by a rear head block 24, and the front is turned into a position to supply pressure fluid and rear heads are maintained in assembled re lation with respect to the cylinder by usual side bolts 25, 25. The cylindrical striking blockV 22 has secured within the bore thereof, by across pin 15 26, the forward end portion of a cylindrical strik ing rod or bar member 2l extending axially through the bore 2d in the hammer piston and to the port G9, passage Eil, port 5I, longitudinal Vhaving at its rear end an integral striking head piston projection to the rear end of the large 29. During forward feeding of the punching 20 mechanism, the hammer piston of the hammer ing mechanism is adapted to deliver impact blows to the rear annular striking surface of the strik ing block 22V to drive the punch pin 20 into the drill steelbore, and, upon reversal of the ham mechanism during punch pin withdraw 2.5 mering al, to deliver impact blows to the forward annu lar striking surface of the striking head 2S to hammer the punch pin out of the steel bore. Formed in the frame 9 with its axis lying in a. passage 52, lconduit 53, chamber 54 and passage 55, to the pressure chamber 56, pressure fluid may now through passage 64 and annular re 15 cesses 62 and 63, pressure fluid flowing from the former past the reduced exteriorof the hammer bore E5 to act on the rear pressure area of the large piston head i8, and through the latter 20 recess, afterV the piston has moved forwardly, to the rear end> of the reduced bore I6 to sup plement the pressure coming from the chamber 5S axially of the cylinder and which, though dur ing hammering is somewhat throttled by the head 25 ‘29, acts constantly on the rear pressure area of the`small piston head I9. At this time the for ward end of the cylinder bore i 5 is connected to exhaust through exhaust port 61, and the pres vertical plane including the hammer motor axis, sure acting on the rear pressure areas of the 30 and located below the guideways on which the hammering mechanism is guided, is a feed cyl inder whose bore ill contains a reciprocatory hammer piston drives the latter forwardly in its cylinder. Cut-,off to the larger rear area feed piston 32 having its feed piston rod 33 pro 35 jecting through the packed rear head of the feed cylinder and secured at 3@ to a depending por~ tion 35 of the rear head block 2d. The forward end of the feed cylinder bore is closed by a threaded plug 36, and formed in the frame@ 40 transversely beneath the feed cylinder bore, sub stantially midway between the ends of the latter, is a valve bore 3l having mounted therein a ro tary control valve 33. Secured to the valve rod of this valve is an operating lever 3Q to which 45 are pivotally connected at ¿iii parallel links Lil, in turn pivotally connected at ¿2 to a longitudi nally slidable operating rod 43. This operating rod is guided Within guiding brackets M, ¿ifi se cured to the frame 9, and is formed at its forward 50 end with a grasping handle 135. The rotary con trol valve 3B is provided with an internal cham ber ¿il which communicates with a pressure chamber d8 formed within the frame 9, in turn communicating with any suitable pressure fluid source. The valve chamber ¿il is communicable through a radial valve port ¿i9 with a passage 5u which is connected by a port 5l to a longitudi nal passage 52 formed in the frame 9, in turn connected by a conduit 53 with a chamber 54 60 formed in the rear head block projection 35. The chamber 54 is connected by a passage 55 to an annular chamber 55 formed in the rear head block 2è of the hammer motor. Also communicable with the valve chamber di through radial ports 65 formed in the valve body are reverse and for ward feed passages 5l' and 53, the former com municating through a passage 55 with the for ward end of the feed cylinder bore, and the latter communicating through a port til with the rear end of the feed cylinder bore. The fluid distribution means for effecting re ciprocation of the hammer piston of the ham >mering mechanism is of a well known design and comprises recesses S2 and 63 formed annularly in the walls of the reduced bore lâ of the hammer occurs when the head I9 overruns the groove 62. When the exhaust port 51 is uncovered by the ’ rear edge of the large piston'head I8, the rear 35 end of the bore l5 is connected _to exhaust, while the rear edge ofthe small piston head I9 over runs the radial ports of the supply passages 65, 65, thereby admitting pressure fluid from the recess 63 through these passages and ports 66 to the forward end of the large cylinder bore I5, the pressure fluid acting on the large front pres sure area of the piston tofdrive the latter rear wardly in its cylinder against the opposing con- ' stant pressure acting on the Arear pressure area of the small piston head I9. These operations are rapidly repeated during normal operation of the hammermotor, thereby effecting a rapid hammering action. which is transmitted through the cylindrical punch pin block and bar to the 60 punch pin or to the head 29, depending upon whether hammering in_or hammering cut is in progress. By adjusting the control valve 38, pressure'may be supplied either to one end or the other of the feed cylinder, thereby to effect feed 65 ing of the punching mechanism either forwardly to drive percussively the punch pin into the drill steel bore, or rearwardly to effect percussive with drawal of the punch pin from the steel bore. The improved means for eifecting automatic 60 control of the feed mechanism and for varying the ran-ge of movement of the punching mech anism comprises an upstanding- projection 1U formed integral with the valve operating rod 43 and engageable by a stop plunger 'H mounted 66 in a guide bracket '12, herein formed integral with the rear head block 24 of the hammer mo tor. The stop plunger 'll is provided with a series of notches 13 with which a positioning pin 14, arranged in a bore in the guide bracket 12, co 70 operates in the adjustment of therstop plunger. By removing the pin 14 and sliding the stop plunger into different positions, it is evident that the time of engagement of the projection 1I] with the stop plunger may be varied, as desired. -75 r2,121,818 reduce wear. Y . f I The ' operation of the improved punching Ímechanism will be clearlyapparent from the de scription given.` When the drill steel 4 is prop L Y, elly-positioned with respect tozits clamping mech v :10 ' _ ‘ I ' f While there is described in this application one form which the invention may assume in prac tice, it will be understood that this form is shown for purposes of illustration and that the inven tion „may be modified and embodied in various other forms without departing from its spirit orv *A ’ ` the scope of the appended claims. anism'3 and'v stop plate 6, the operator grasps v v What I claim as new and desire to secure by Letters and lever 39, the control valve 38 into a posi-Y tiontosupply motive Vfluid through thev hammer motor supply passages' to thehammer motor cyl `inder, thereby to effect rapid reciprocation of Áthe hammer piston.V At the same time, pressure fluid is supplied from the valve chamber through passage 58 and port 60 to the rear end of the feed cylinder bore, the pressure iiuid acting on the rear pressure area of the feed piston 32 to feed the hammering mechanism bodily along the frame guideways 10,10. Upon engagement of the point of the punch pin 20 with the drill A25 steel, the cylindrical striking block 22 is held temporarily stationary so that upon vcontinued movement of the hammer mechanismrwith re ` spect thereto this striking block is brought into striking relation with the hammer piston, and as @30 aresult, upon continued forward movement of Patent is: Y Y 10 » ' 1. In a Ypunching mechanism, a guide; a harn mer mechanism-mounted on said guide for move ment therealong and having reversible hammer .ing` means for driving with a hammering action a punch pin `into and out of the. work, means for feeding said lhammer mechanism forwardly and rearwardlyalong said guide, means for effecting operation of said hammer mechanism during both forward, and reverse feeding movements thereof, 1 and mechanically actuated means for aut-ornati cally reversing the direction of feed when said hammer mechanism has lbeen fed in one direc tion a predetermined distance including an abut inentimounted exteriorly of and movable with l ysaid hammermechanism, and a reversing control element supported against bodily movement with respect to said guide and having operating means engageable Yand actuated by said abutment. 2. In a punching mechanism, a guide, a re .the hammering mechanism the Ípunch pin is driven into the rdrill steel bore by the repeated blowsy of the hammer piston against the striking block 22. When the reforming of the drill steel versible punch pin hammer mechanism slidable on said guide and having reversible hammer means for driving the punch pin either forwardly -bore is completed, that is, when the punch pin mechanism forwardly and rearwardly along said î guide, means for automatically reversing the di `has been driven into the drillsteel bore a suf ñcient distance, -the'stop plunger 1l engages the projection 'IllY of the valve control mechanism, thereby to swing the valve from itsïforwar'd feed position to its reverse feed position, while the supply of motive fluid to the hammer cylinder is continued, and as a result the direction of feedV is'automatically reversed. Pressure ñuid then flows through passages 51,v 59 tothe forward 44end of the feed cylinder b_ore to act on the for ward pressure area of thefeed piston, and as a . result the hammer mechanism is fed rearwardly along the frame guideways. If the punch pin sticks within :the steel bore, the striking block 22 will beheld stationary while the rearward move ment of the hammer mechanism continues, there ' by bringing` the strikingv head 29 of‘thestriking a block rod or bar 21 into a position wherein the i art. the'> handle 45 to push the operating rod, 43 rear wardly, thereby to'rotate, through the links 4l “ „es f3 Will be `clearly apparent to those skilled inthe . Passages 'l5 are provided to conduct lubricant carried in the motor exhausty through port 6.1., to 'the' guideways |0,. lll. and guides I2, l2. The guides and guideways may be case hardened t Y rear end of the hammer piston will percussively actuate the same, thereby driving the punch pin Vout of the work witha hammering action. When the punch pin is Withdrawnr from~ the drill steel bore, >the operator may operate the control rod 'handle_45 ’to moverthe control valve into its neu tral position, therebygshuttingdown both the hammer motor and feed. ' _ As Va result‘of this invention, it will be note Y that an improved punching mechanism is pro vided for reforming the bore of a hollow rock-drill steel subsequent to the drill sharpening process, ,65 wherein the punch pin for opening the steel bore is driven into andout of the bore with a hammer ing action. It will further benoted that by the Y provision of the improved variablelrange Ycontrol mechanism, it is possible .to vary the length of travellof the hammering mechanism and to effect >automatic reversal of thedirection of feed when the >punch pin has been driven intoîthe steel bore or rearwardly, means for feeding said hammer rection of feed when said hammer mechanism has been ,-fed in one direction a predetermined ldis tance, and associated means for varying the dis tance of travel of said hammer mechanism. 3„In a punching mechanism, a support pro-Y YVidinga guideway, a hammer mechanism mount ed on said guideway for movement therealong and having reversible hammering means for hammering a punch pin into and out of a drill steel bore, reversible means for `feeding' Ysaid hammer mechanism forwardly and rearwardly along said guideway, means for effecting opera tion of said hammer mechanismduring both for ward and rearward feeding movements thereof, and mechanically actuated means for automati cally reversing said feeding means when said hammer mechanism has driven the punch pin a ' predetermined distance into the drill steelbore including an abutment mounted exteriorly of 55 and movable with said hammer mechanism, and a `reversing control element mounted on said sup port and engageable and actuated by said abut ment. , Y 4. In a punching mechanism, a support hav ing a guideway, a hammer mechanism slidable on said guideway and having reversible ham mering means for hammering a punch pin into and out of a drill steel bore, reversible means for feeding saidÍ hammer mechanism forwardly and ’ rearwardly along said guideway, means for au tomatically reversing said. feeding means when ¿said hammer mechanism has driven the «punch ` pin a predetermined distance into the drill steel bore, and associated means for varying the vdis tance which the punch pin may be driven'into the drillv steel bore. a' ` 5. In a punching mechanism, a support having aV sufficient distance. V.These and other .uses and Y .a guideway, a hammer mechanism slidable on advantages of the improved punchingmechanismV said guideway for hammering a 'punch pin into @is î 2,121,818 4 . and out of a drill steel bore, reversible means for feeding said hammer mechanism forwardly and rearwardly along said guideway, means for auto positions to engage said first mentioned rod at different times. 9. In a punching Y mechanism, a reversible matically reversing said feeding means when said hammer mechanism has driven the punch vpin a punch pin hammer mechanism having reversible predetermined distance into the drill steel bore, and associated means for varying the distance punch pin to drive the latter either forwardly or which the punch pin may be driven into the drill steel bore, said feed reversing means including a mechanism forwardly and rearwardly to move the 10 control element for effecting feed reversal and said associated means including a control rod guided on said support, a projection on said con trol rod and an abutment movable with said hammer mechanism and engagea-ble with said v15 control rod projection. 6. In a punching mechanism, a support having a guideway, a hammer mechanism slidable on said guideway and having reversible hammering means for hammering a punch pin into and out of a drill steel bore, reversible means for feeding said hammer mechanism forwardly and rear wardly along said guideway, means for automati cally reversing said feeding means when said hammer mechanism has driven the punch pin a predetermined distance into the drill steel bore, and associated means for varying the distance which the punch pin may be driven into the drill steel bore, said feeding means comprising a feed cylinder containing a feed piston, said reversing means including a reversing Valve for controlling the supply of actuating fluid to the opposite ends of said feed cylinder, and said associated means including an abutment movable with the hammer mechanism and operative upon a pre 235 determined forward feeding movement of said hammer mechanism to effect reversal of said valve. . 7. In a punch mechanism, a support having a guideway, a punch pin hammering mechanism 40 slidably mounted on said guideway for driving a punch pin with a direct hammering action into and out of a drill steel bore, reversible feeding means for said hammering mechanism, control means for effecting feed reversal, and operating means for said control means for effecting auto matically feed reversal when the punch pin has been driven into the drill steel bore a predeter hammering means for percussively actuating the rearwardly, means for feeding said »hammer punch pin toward and from the work during the permissive-action thereon, means for automati l0 cally reversing the direction ofY feed when said hammer mechanism has been fed toward the work a predetermined distance, and means incor porated in said automatic means for varying the distance of travel of said hammer mechanism to ward the work. 10. In a punching mechanism, a hammer mechanism having reversible hammering means for hammering a punch pin into and out of a drill steel bore, reversible means for feeding said '20 hammer mechanism forwardly and rearwardly to move the punch pin toward and from the drill steel during the hammering action thereon, means for effecting operation of said hammer mechanism during forward and rearward feed l25 ing movements thereof, and mechanically actu ated means for automatically reversing said feed ing means when said hammer mechanism has driven the punch pin a predetermined distance into Ythe drill steel bore including an abutment 30 mounted exteriorly of and movable withV said hammer mechanism and a movable reverse-ef fecting vcontrol element relative to which said hammer mechanism is bodily movable, said con trol element engageable and actuated by said movable abutment. 11. In a . punching mechanism, a hammer mechanism having reversible hammering means for hammering a punch pin into and out of a drill steel bore, reversible means for feeding said hammer mechanism forwardlyrand rearwardly to move the punch pin toward and from the drill steel during' the hammering Vaction thereon, means for effecting operation of said hammer mechanism during forward and rearward feeding movements thereof, means for automatically re mined distance including a longitudinal rod slid ably guided on said support and operatively con versing Vsaid _feeding means when said hammer mechanism has driven the punch pin a prede termined distance into the drill steel bore, and nected to said control means, and an abutment rod mounted on said hammering mechanism and means associated with said automatic means for 50 engageable with said ñrst mentioned rod. be driven into the drill steel bore. 8. In a punch mechanism, a support having a guideway, a punch pin hammering mechanism slidably mounted on said guideway for driving a punch pin with a direct hammering action into and out of a drill steel bore, reversible feeding means for said hammering mechanism, control means for effecting feed reversal, and operating 60 means for said control means for effecting auto matically feed reversal when the punch pin has been driven into the drill steel bore a predeter mined distance including a longitudinal rod slid ably guided on said support and operatively con 65 nected to said control means, an abutment rod mounted on said hammering mechanism and en gageable with said first mentioned rod, and means for varying the depth of penetration of the punch 70 pin within the steel bore including adjusting means for said- abutment rod, said adjusting means including a series of notches on said abut varying the distance which the punch pin may , . Y12. In a punching mechanism, a support pro viding a guideway, a hammering mechanism mounted on said guideway for movement there along, reversible means for moving said ham 55 mering mechanism forwardly and rearwardly along saidv guideway, means for automatically re versing 'said feeding means when said hammer- _ ing mechanism has moved along said guideway a predetermined distance in one direction, and as sociated means for varying the distance of move ment in said direction including a control ele ment on said support, for. effecting feed reversal, said hammering mechanism movable bodily rela tive to said control element, a control rod sup ported for axial movement on said support, a pro jection on said control rod, and an adjustable abutment mounted exteriorly of and movable with said hammering mechanism and engage able with said control rod projection for axially moving said control rod. ' ment rod and a stop pin engagea'ble with said 13. In a punching mechanism, a support pro notches to hold said rod in adjusted position, said Y viding a guideway, a punch pin, hammering abutment rod being slidable axially into different mechanism mounted on said guideway for move 75 2,121,818 ment therealong, reversible Vfeeding means for said. hammering mechanism for moving the lat ’ter forwardly and rearwardly along said guide way, control means „for effecting feed reversal, manual operating means for saidl control means including a longitudinal controlrod supported for ’ axial movement‘onsaid,support ‘and operatively ' connected to said 'control means, and automatic operating means for said lcontrol means for ef 1o fecting automatic feed reversal when.v said ham-4 mering mechanism has moved along said guide way in one direction arpredetermined distance in cluding said longitudinal control rod, and an 5 ter forwardly and rearwardly along said guide Way, control means for effecting feed reversal, and operating means for said control means for effecting automatic feed reversal when said ham meringA mechanism has moved alongpsaid guide 5 Way in one direction a'predetermined «distance l'including a longitudinal control rod supported for axial movement on said support and operatively connectedto said control means, an abutment rod supported by said hammering mechanism and 10 engageable with said ñrst mentioned rod for axially moving the latter, and means for varying the depth of penetration of the punch pin with# abutment vrod supported by said' hammering . in the steel bore including adjusting means for 15' mechanism and engageable with said first men tioned rod for axially moving the latter.'- ~ 14.'In a punching mechanism, a support pro vidingv a guidew'ay, a punch pin, hammering mechanism mounted onV said guideway for move 20 ment therealong, reversible feeding. means for '_ said hammering mechanism for moving the lat -said abutment rod, said adjusting means includ 15 ing a series 4of notches on said abutment rod and aV stoppin engageable with said notches to hold said rod in adjusted position, said abutment rod ' being movable axially into different positions to engage said first mentioned rod at different times. 2 PAUL H. NAST.