2,409,415 Patented Oct. 15, “1946 » UNITED STATES ` PATENT #OFFICE 2,409,415 l » - UNIVERSAL BENCH GRINDER Anders Bernhard Blomquist,` Cranston,` R. I. Appiieaticn June 20, 1945, serial No; 600,521` I ' y 6 Claims. ly , d 2 . Fig. 5 is a sectional view taken substantially 'IIhis invention relates toa machine toolß, par ticularly a machinewhich utilizes abrasive means for _removing excessive material from a work pîlece. (o1. 51---e4> . alongi line 5.»5 of Fig, 1; - » Eig. 6 is a sectional view taken substantially ` along line 6_6 of Fig. 1*; and f In making dies, gauges and like tools, it is often necessary after subjecting the tool to a liligL 7 is al sectional view taken substantially along line T-T of F_ig„3_. hardening process to. manually remove, such as In proceeding with this invention I rotatably" by honing or hand grinding, surplus material mount a cutting tool which may be a ,grinding` wheel»` of a size Vand form appropriate to the na 10 ture or, the work to be operated- upon. The wheel is- providedl with a reciprocal motion- . and is It is an object of this invention to provide a from, the tool at locations thereon not accessible to machine tools now in use. . machine toolv which will be adaptable for'more mounted in such` a manner` as to approach the» complete use in the removal of material from work either from- above or below orV at such an angle as may be found- desirable. dies, gauges and like tools after subjecting the Referring to the drawings for a more detailed. 15. same toa hardening process. description of the invention Iû» designates a base Another object of the invention is the provision f‘rom which there extends an upright or column ‘ of a machine toolof the above character in which il `at the~ upper end of which there is fìxeda the cutting tool will be provided with a recipro bracket I2. The bracket I2 has a bearing in cal motion. Another object of the invention is the provision 20 the form of a trunnion I3, the axis` of which extends substantially horizontaler at right angles of a machine tool of the above character in which to the column II_ Rotatably mounted on the a rotating cutting» tool will be additionally pro bracket I2~is a grinding head whichcomprises vidcd‘with a reciprocating motion. asupport I4; provided with- an opening I5 which Another object or the invention is the provi-> sion of a machine tool of the above character in 25 -lis` split andin which is receivedl the trunnion> I3., The lwalls of this opening terminate in spaced. which the cutting tool may be positioned to oper ears provided with aligned openings I6“ and I'I ate upwardly or downwardly upon the work., (see- Fig.` 5). The opening I1 is threaded and Another object of the invention is the provision receives a screw bolt IBV which extends through of» av machine tool of the above character in which the cutting tool support may be rotated 30 opening'rIIS- to adjustably secure the support on through 360°, v the bracket I=2. - Another object of the invention is the provi sion of a machine tool of the above character in which the tool may be rotated and reciprocated by sources of power which are independent from each other, Another object of the invention is Ythe pro vision of a machine of the above character in which a work support may be angularly posi tioned with respect to the cutting tool. Y With these and other objects in view, the in vention consists of certain novel features of con struction, as will be more fully described and VFrom the support `Ui thereextends in spaced substantial parallel relation arms I9, 2U, each `of which is provided at the outer end with a clamp portion12| in which there is provided an open ing the, wall4 of` which extend into spaced ears. and are pierced to receive clamp screws 22. A bearing sleeveV 2.3 is mounted within the openings ofl the- clamps andl provides a bearing in` which a 40 motor 24; is slidably mounted. This motor is provided with an outer sleeve 25 to which there are» securedv spaced shoes 26, 2l', These shoes ex tend through an» elongated opening 28 provided, inthe outer sleeve 23 and provide a bearing.- open particularly pointed out in the appended claims. 45~»Í,ing«which receives the end portion of a lever 29 In theaccompanying drawings: Fig. 1 is a side elevation partly in section of a machine embodying my invention; outer sleeve 23._ Fig. 2 is a front elevational view of the ma chine; Y which is rockable to reciprocaterthe motor in the> y `Lever 29» is Íulcrumed ori» hanger Eil, one end of which terminates > into a reduced> threaded portion , Fig. 3 is a side elevational view of the machine 3l1 located in elongated slot 32 providedv inthe with the cutting tool and supporting structure arm I9; ` A nut :i3` engages the threaded portion positioned at a location opposite to that shown, 3i and secures the hanger `il); in adjustable posi-I inIFigl; tion along the slot 32, The hanger 3f!` is 4also' - A ‘ Fig; 4- isa view partly in section taken substan tially, along line 4-,-4.of-,Fig, 3,;_ provided With an elongated slot 3l!` and receives; 55 atpivot stud„_35 which . is, adlustablii` scoured along.; 2,409,415 3 4 the slot 34. The lever 29 is bifurcated at its end an abutment against which the collar 11 rests. A central opening 80 is provided in the table to receive the abrasive wheel 8l enabling it to move beyond the surface of the table when the wheel reciprocates. The wheel 8l is secured to the spindle of motor 24 by means of a chuck 82 and may be of a size and shape which is appropriate for the nature and character of the work to be portion 36 providing arms 31, 38 and also has an elongated slot 39 which receives the stud 35 to pivotally mount the lever on the hanger 30. The arrangement provides for changing the position of the lever in a horizontal and in a vertical direction. A cam 40 is positioned between the arms 31, 38 and engages the same to rock the lever about handled. In the operation of the machine the motors are set in motion, the motor 24 rotating the abra sive wheel 8I and the motor 41 reciprocating the abrasive wheel 8| in a manner above described. The work rests upon the surface of the table 62 the stud 35 and thus reciprocate the motor 24 in the sleeve 23. This cam is fixed on one end of a shaft 4| which is journaled in the support I4. The other end of the shaft carries a pul ley 42. A second shaft 43 is also journaled in the support I4 and carries a pulley 44 at one end thereof and a pulley 45 at the other end. Pul ley 44 is aligned with pulley 42 and a belt 46 which has been adjusted to the desired position. The work is then manually moved to the abra sive wheel and' manipulated in an appropriate operatively connects the pulleys. manner so as to remove such material as is In order to provide motion for the cam 40 a motor 41 is mounted at the upper end of the column I I by means of abutments 48 on the motor at a position to engage the surface of an L-shaped bracket 49. The motor is secured to this bracket by means of screw bolts 50. A speed reducing mechanism 5I is attached to the motor 41. From this mechanism 5I, there depends a worm shaft desired from the work. When it is desired to change the location of the grinding head from a position above the table 62, as shown in Fig. 1, to a position beneath the table, as shown in Fig. 3, the bolts 54 are loosened and the table swiv eled about the column Il to a position which is out of the path of travel of the grinding head, the collar 11 moving with the bracket 63 because 52 which is journaled in bearings 53, 54 (see Fig. of its connections and the support I4 is free to 7,) secured to the upper and lower plates 55, 56 be moved about trunnnion I3. The table 62 is which are fixed to the column in any appropriate next raised to clear the abrasive wheel 8|, then manner such as by frictional engagement with swung about the column to align opening 80 with the inner walls of the column Il. This worm the axis of the tool 8| and permit passing of the shaft 52 engages a worm gear 51 fixed on a shaft table thereover. To place the grinding head in 58. The shaft 58 extends substantially concen the position shown in Fig. 1 it is merely necessary tric with the axis of the trunnion I 3 and is jour to reverse the operation above described. naled in bearing bushings 59 and 66. 'A collar 35 It will now be apparent that I have provided 6I surrounds the shaft and engages the end of a machine in which the abrasive tool supporting bushing 59. The worm gear 51 abuts against head may be swung through 360° to position the the end of bushing 60 thus preventing axial move same at a location which is appropriate to the ment of the shaft in its bearings. The shaft 58 character of operation to be accomplished. It extends beyond the support i4 and mounts a pul 40 will also be apparent that the motor 24 may re ley 6I which is aligned with pulley 45. An end main idle and the abrasive wheel 8l exchanged less belt 62 operatively connects these pulleys for such abrasive member which is operated by 45 and IBI. Thus, motion is transmitted from the reciprocation thereof. The speed of recipro the motor 41 to the cam 4B through the speed cation may be chosen by the exchange of driving reducing mechanism 5I, worm 52, worm gear 51, 45 pulleys. shaft 58, pulleys 6I, 45, shaft 43, pulleys 44, 42 and shaft 4I. I claim: l. A machine tool having a grinding head mounted for movement through an arc greater - A work supporting table 62 is swivelly mounted on the column I I by means of a bracket 63 which than 180°, a motor slidably mounted in Said head, is adjustably slidable and secured in position on 50 means for attaching an abrasive wheel to the the column by bolts 64. The bracket is provided spindle of said motor, e, rockably mounted lever with an arm 65 positioned at one side of the cen engaging said motor, and a cam engaging said ter of the table and has an upwardly extending lever for reciprocating said motor. portion 56 which is received between ears 61, 68 2. A machine tool having a base, a bearing car depending from the table 62 from an edge por 55 ried by said base and extending in a horizontal The table 62 is pivotally mounted direction, a grinding head rotatably mounted by with relation to the portion 66 by means of a saidbearing for rotation in a vertical plane, an _ tion thereof. pivot pin §69 extending through portion 66 and through the ears 61, 68. The ear 61 is provided abrasive wheel carried by said head, and means for reciprocating said wheel including a pulley 60 mounted for rotation about the axis of said with an arcuate slot 10 through which there ex tends a lock bolt 1| threadedly engaging opening ~ bearing. 12 in the portion 66. The lower portion of the ear 61 may be provided with graduations 13 and 3. A machine tool having _a work support, a grinding head mounted for rotative movement the portion 66 with a datum line 13' so as to in about a horizontal axis relative to said support dicate the position of the surface of the table rel 65 through an arc greater than 180° and movable ative to the vertical. to position said grinding head from a location The table may be raised or lowered by means above said support to a position beneath said of a threaded member 14 provided with an en larged head 15 and fixed against longitudinal movement along the arm 65 in a manner to per mit rotation thereof as at 16. A collar 'I1 is swivelly mounted on the column II and has a support. 4. A machine tool having a base, an upright 70 extending from said base, a trunnion carried by said upright at substantially right angles thereto, a grinding head rotatably mounted on said trun threaded opening 'I8 through which extends the nion for movement through an arc greater than threaded member 14. A clamp collar 19 is ad 180°, a motor slidably mounted insaid head, justably mounted on the column II and provides 75 means for attaching an abrasive wheel to the 2,409,415 6 spindle of said motor, a work support movable mounted on said upright at a location to be posi tioned beneath said trunnion, said grinding head being movable to be positioned from a location above said support lto a position atv a location beneath said support, said support having an opening through which said abrasive Wheel may extend when positioned beneath said support. 5. .A machine tool having a base, an upright extending from said base, a trunnion carried by said upright at substantially right angles thereto, above or beneath said support, said support hav ing an opening through which said abrasive wheel may extend when positioned beneath said support. 6. A machine tool having a base, an upright extending from said base, a trunnion carried by Said upright at substantially right angles thereto, a grinding head rotatably mounted on said trun nion for movement through an arc greater than 180°, a motor slidably mounted in said head, means for attaching an abrasive Wheel to the spindle of said motor, a work support movably mounted on said upright at a location to be posi a, grinding head rotatably mounted on said trun -nion for movement through an arc greater than tioned beneath said trunnion, said grinding head 180°, a motor slidably mounted inI said head, being movable to be'positioned from a location means for attaching an abrasive Wheel to the 15 above said support to a position at a location spindle of said motor, a Work support mov-ably i beneath said support, said support having an opening through which said abrasive Wheel may mounted on said upright at a location to be posi extend when positioned beneath said support, a tioned beneath said trunnion and extending in lever rockably mounted in said grinding head and the path of movement of said grinding head, said grinding head being movable to be» positioned 20 engaging said motor, a carn carried by said head ` and engaging said lever for rocking the same for from a location above said support to a position at a location beneath said support, said support reciprocating said motor. being movable out of the path of movement oi said grinding head when moved from a location ANDERS BERNHARD BLOMQUIST.