Патент USA US2403484код для вставки
July 9, 1946. ' , H. ASHWORTH 2,403,484 TAPPING AND THREADING MACHI’NE Filed Nov. 4, 1943 i ATTORNEY - ZAOBAM Patented July 9, 1946 UNITED STATES‘ PATENT OFFICE 2,403,484 V TAPPING AND THREADING MACHINE Handel Ashworth, Baldwin, N. Y. Application November 4, 1943', Serial No. 508,942 2 Claims. 1 (or. 10-136) , 2 generally vertically arranged body l9 having a pedestal 29 at the lower end thereof. The body l9lis provided with a horizontally ar ranged bearing 2| in which is slidably and rotat This invention relates generally to the art 0 tapping and threading and more particularly to an improved automatic threading and tapping machine. ably mounted a drive shaft 22. The shaft 22 at Among the principal objects of the present in CR the forward end thereof carries the driver chuck vention lies the provision of a tapping and thread~ H, which may be ofany well known construc ing machine which produces work of a high de tion. The rear portion of the drive shaft 22 as gree of accuracy comparable to that produced by previously described is rotatably and slidably» accurate screw thread cutting lathes. mounted in the bearing 2! and has keyed thereto Another object herein lies in the provision of I a machine of the class described by the use of which, after the initial adjustments have been made, a large number of uniformly tapped or threaded articles may be produced, even though the skill or experience of the operator be of low 15 order. A still further object of the present invention lies in the fact that adjustments in the machine to accommodate the same to changes in the type, a .pair of driver discs 23 and 24. The upper por tion,25 of the body it extends above the bearing 2! and has a vertically arranged bearing 26 with in which is mounted the vertical drive shaft 2?. The shaft 21 is free to rotate in the bearing 2% and has keyed thereto a disc 28 with a rim of fric tional material 29 as for example, rubber or leather. The diameterof the. disc 28 is slightly less than the distance between the discs 23‘ and may be quickly and conveniently made,‘ without 24 so that the discs 23 or 24 may alternately con tact the rimof frictional material 29 as the drive shaft 22 is horizontally reciprocated as will he the use of tools or special skill. A feature of the invention lies in the fact that more fully described hereinbelow. The tool holder I'E‘includes a cup shaped member 39 which size, or kind of the work piece operated upon as each piece has the work thereon ?nished, it may be quickly removed and a new unworked piece secured in its stead, so that rapid large scale production is provided. These objects and other incidental ends and advantages will more fully appear in the progress of this disclosure and be pointed out in the ‘ap pended claims. ‘ ' In the drawing, in which similar reference char acters designate corresponding parts throughout the‘ several views: ' Figure 1 is a fragmentary side elevational view of a preferred embodiment of the invention, cer acts as a socket or receptacle for the threading, die It.‘ The die [8 is ‘detachably engaged within the receptacle 3B byv means of set screws 3! in a well known manner. The receptacle 3!) has an integral rearwardly and‘ horizontally extending shank 32 which is loosely ?tted within the bore 33' in‘theso‘cket‘joint 34. The rear end of the shank'32' isv provided with an enlargement 35 which engages a correspondingly enlarged portion in the stem 36 of the socket joint 3d so that the _ shank '32 may shift slightly in any radial direc tion with respect to the stem 36. The rear surface of the receptacle 3!} ‘is provided with a pair of diametrically arranged and rearwardly directed Figure 2 is a fragmentary plan view of Figure 1. drive pins 31 which are adapted to abut against In accordance with the invention the thread a pair of similarly disposed pins‘ 38 projecting 40 ing and tapping machine generally indicated by from the front face 39 of the disc-like body llil numeral [0 comprises a base H, a bed I2, a car of the socket joint 34. riage l3, a work holder M, a reversible driver The bed l2 includes a front upright plate M I5, a tool holder [6 and driver chuck l1. and a rear upright plate 42. The plates M and As shown in the accompanying drawing byway 45 4%! are secured to the upper surface of the base of example, the machine is set up in such a man II in any‘suitable manner. Between the plates her as to illustrate, the use thereof in ‘a thread 4! and 42 are a plurality of guide rods 13,14 and ing operation. As will be obvious to those skilled ‘iii. The guide rods ‘it-‘J5 inclusive, are dis in the art to which the present invention relates, posed in spaced and parallel arrangement, sus the tool holder [6 may have substituted therefor pended from and‘ ?xedly secured to the plates a similarly constructed tap’ (not shown). As will 50 ill and 12-2- in. any suitable manner as' for ‘example, be apparent in the course of this disclosure, such icy-threading the ends of ‘the rods ‘as indicated at substitution of a tap for the threading die. I8 numerals 43—d3=inclusive, and securing ‘the rods may be simply and easily accomplished. ' in place‘ by means of- nuts threa'dedly engaged As best seen in the right-hand portion of Fig 55 ures 1 and 2‘, the reversible driver l5 includes a tain parts being shown in section. thereon.’ ' " ‘ ' ' ‘ ' ' ‘ , 3 2,403,484 The carriage [3 includes a body 49 having a plurality of bearings 59, 5| and 52 at the lower most portions thereof. The bearings 50—52 in clusive are penetrated by the guide rods 43—45 inclusive respectively, and said bearings as well as the carriage l3 have longitudinal horizontal rectilinear movement therealong. The upper portion of the body 49 is enlarged to form the 4 56 and to securely clamp the work piece 65 within said collet. The carriage I3 is now moved rear wardly or toward the driver [5. As soon as the rear end of the work piece 65 contacts the coni— cal portion 86 of the die I8 this causes the stem 39 and the drive shaft 22 to move rearwardly (toward the driver [5). This rearward move— ment results in the rear surface of the disc 23 head 53. The head 53 is provided with a hori contacting the rim 29 of the disc 23 causing the zontal longitudinally directed bore 54 the rear 10 rim and the parts directly and articulately con portion of which may be outwardly tapered to nected thereto to rotate in the direction of the receive the taper sleeve 55, within which is dis arrow 81. The threading operation is continued posed the split tapered collet 56. The rear por for the requisite depth or extent upon the piece tion of the collet 56 has an externally threaded 65 when rearward pressure upon the clamping hollow neck 51 adapted to be threadedly en 15 wheel 60 or the carriage I3 is stopped. This gaged by the internally threaded bore 58 of the stoppage will result in a separation or slippage hub 59 of the work clamping wheel 66. The outer between the disc 23 and the rim 29 and a cessa cylindrical surface of the hub 59 is journaled tion of the threading operation. At this point the screw 16 and/or the stop 19 are adjusted in ?ange 6| which is rotatably positioned within the 20 position with relation to each other and to the retainer ring 62. The said ring 62 is secured to rod 15 so that further rearward movement of the the rear surface of the head 53 by the bolts 63. carriage I3 is prevented. This last described ' Thus,’ the hub 59.is adapted for rotation about a setting operation of the bolt ‘l6 and the stop horizontal axis within the head '53 but is incapa 19, as well as the setting of the bolt 69 need ble of axial movement with relation thereto. 25 only be done once for the first work piece in any The clamp wheel 60 in the hub 59 thereof is series of identical work pieces. provided with means 64 to axially position the After the work piece 65 has been properly work piece 65 within the collet 56. Said means threaded at the rear end thereof forward motion includes a threaded bolt 69 having a head 66 at of the carriage 13 or the hand wheel 69 will pull the front end thereof and a rounded terminal the disc 24 into contact with the rim 29 resulting 6'! .at the rear end thereof. The bolt 69 is in a reversal of the motion of the parts as con threadedly engaged in a central ori?ce 68 in the trasted with that previously described. Assum hub 59. The bolt 69 is secured in any longi ing the thread on the end of the work piece 65 to tudinally adjusted position thereof by means of be a normal right hand thread, this forward mo-. the lock nut 10. . 35 tion of the work piece will cause the die It to be Detent means generally indicated by numeral come unthreaded from the piece 65. It now be 1| to limit the movement of the carriage I 3 comes a simple matter to rotate the clamp wheel toward the threading tool or tool holder I 6 are 60 in an opposite direction, to remove the work positioned upon the guide rod 15 and include piece 65 and to replace it with a fresh or un the bolt 16 which is threadedly engaged in the treated piece corresponding to the work piece 65. body 49 of the carriage l3 in the lower right It may thus be seen that I have disclosed a hand portion thereof. The bolt 16 is provided novel and useful threading and tapping machine which is readily adapted for treating a large with an enlarged head 11 and a rounded rear terminal 18. The stop 19 has a bearing 80 at number of pieces in quick succession and which the lower portion thereof which is slidably posi after a simple series of setting operations pro duces a plurality of parts having uniformly tioned upon the guide rod 15 and may be ?xedly secured in ‘any longitudinally adjusted position worked characteristics with relatively low’degree thereof by means of‘the set screw 8!. of tolerances in conformity between individual parts treated. ' p By reason of the adaptability of the present I wish it to be understood that I do not de device it may be used in various manufacturing machining operations. For the purpose of clar sire to be limited to the exact details of construc tion shown and described, fOr obvious, modi?ca ity in the present disclosure, however, one mode tions will occur to a person skilled in the art. of operation is here given. The base ll may be In the following claims, the expression thread suitably secured as by clamping to any working 55 ing tool is intended to refer to a tool capable of surface as for example, a table of a drill press cutting or applying threads either to a male or (not shown). The vertical drive shaft 21 may be female member so as to provide a threading or engaged within a chuck of a motor-driven drill in the bore 54, and is provided with a peripheral press or may be connected to any other suit able prime mover such as an electric motor (not tapping operation respectively. I claim: 1. A machine of the class described for thread shown). Assuming shaft 21 to be rotating in the 60 ing a work piece comprising, a carriage, a head direction indicated by arrow 85 with the discs forming a part of said carriage and having a bore 23 and 24 disengaged from the disc 28 the device therein, a collet associated with said head and be will be in a neutral condition. Assuming that a threading operation is to be performed, the die 65 ing seated in said bore, a wheel having a hub to operate said collet for adjusting said work piece I8 is secured within the receptacle 30 by manipu in said collet, a screw cutting tool, reversible lation of the set screws 3! and the stem 36 driving means for rotating said screw cutting tool is engaged by manipulation of the chuck [1. As in either direction, means to mount said carriage suming a. work piece like the piece 65 for exam ple, the bolt 69 is adjusted in position by rotat 70 for movement toward and from the screw cutting tool, and adjustable stop means to limit the move ing the head 66 thereof so that the proper amount ment of the carriage toward the screwcutting of the work piece 65 will project from the front face of the collet 56. After the bolt 69 is prop 2.‘ A screw cutting machine comprising'a driv erly adjusted the lock nut 10 is tightened. Now ing shaft, a pair of driving members thereon, a the clamp wheel 69 is rotated to close the collet 75. rotating'wheel for engagement with either of said tool. ‘ ' 2,408,484 5 6 drive members, said shaft being axially movable to permit driving engagement of either of said depth of insertion of a series of given work pieces into said collet bore, means for supporting members with said wheel thereby to reverse the direction of rotation of said shaft, screw cutting means carried and driven by said shaft, a work piece holding collet having a work piece holding bore, means to contract the bore in said collet thereby to hold a work piece substantially in axial alignment with said screw cutting means, a stop for causing engagement of a work piece with said screw cutting means and for causing selective engagement of said members with said wheel, and means to limit the degree of movement oi said axially slidable supporting means to deter member which may be pre-set to determine the 10 said adjustable collet and being axially slidable mine the extent of the screw cutting operation. _ HANDEL ASHWORTH.