US1872746A - Honing machine - Google Patents

Description

Filed April 28, 1930 2 sheets-sheet 1 ,uw IM,

Allg 23, 1932- A. M. JOHNsoN 1,872,746

HONING MACHINE Filed April 28, 19250 2 Sheets-Sheet 2 Z5@ 1li @3f/"5 JY" f/74 f7- Jr" l I E I J6 L l l l l/ f Z/ ff/ i l Ef ff l i l /ff l I Patented Aug. 23, 1932 uNrrl-:DA STATES PATENT OFFICE. 1

ALBERT JOHNSQN, 0F BIOCKFQRD, ILLINOIS, ASSIGNOR T0 BARNES DRILL COMPANY, i

or ROCKFQRD, lLLINOIs, `A centenario,n'or` ILLINOIS vrrorirlvd MAonINr.

Application :filed .April 2a i930- Seial 'NO- 447,854-

`The invention relates to honing machines of the type in which one or more rapidly rotating honing tools are reciprocated by hydraulic means for the purpose of producing a smooth, highly inished'surface upon Vthe interior of a hollow cylindrical body.

Such machines have -heretofore been applied for the most part to the'inishing fof internal combustion ,engine cylinders" arranged in blocks of four, siX or eight' as'the case maybe. When thus applied, only afrelatively short stroke is required of the vhon-ing tools. The honing process may, however, be applied to great vadvantage to other cylindrical bodies such, for example, asDiesel engine cylinders, air cylinders and steam locomotive cylinders, but in view of thewidely varying range in sizes it is necessary .-to provide machines of correspondingly diiierent sizes. lt is therefore one object of fmyinventionto pro'- vide a honing machine of l,such construction that it can be manufacturedv economically in a varying range of sizes'. Y

The larger cylinders must usually be `operated upon singly and such machines involve the'use of a single lspindle which is reciprocated by a hydraulically actuated means including a piston and cylinder capable odi a stroke corresponding :to 'or slightly exceeding the length Aof the work. The length of such cylinders run asrhigh as llinches, necessitating aspindle stroke oi' `56i nches,and usually lthe work is of substantial diameter so that the force applied to the lspindle to reciprocate .the same .must bevery substantial.

in character. At the same time itis very desirable to maintain the overall dimensions of the machine as small as possible. Vlith this in view a further object of .my invention is to provide a honing machine -embodying a novel arrangement of the spindle, itshydraulic reciprocating means, andthe means lfor rotating the same, such that the force applied for reciprocating purposes is well balanced :to insure a trueaxial thrust onthe spindle, while at the same time the overall length of the machine is minimized. v

The above and other objects are attained through the provision of a honing ,machine Vhaving `a .separately formedftransmiss'i'onreasing which,.in the case of a vertical typemachine, may be mounted on the top nof a column with a portion thereof projectingV over the side of the'column, a splined drivespindle extending through the transmission'casin'g and having a head at its lower end, a pair of actuating hars or rods slidably guided along opposite sides of the casing for movement parallel to the Vdrive spindleand connected to the head Yon Aopposite sides ,of the spindle, together with hydraulic means for simultane ously actuating the two rods whereby CQ apply a balanced actuating force tothe head for reciprocating the same', the two rods also serving to vprevent rotation ofthe head bythe drive spindle. i

Other objects and advantages will become apparent" :from the following description ta-ken'in connection with the accompanying drawings, in which: Fig. 1 isa side elevational view of a-honing machine yembodying the -invention in yits pre1- 'ferryed form. Y f A Fig. 2 is an enlarged `iront elevational view 'of the 4transmission casing, the drive spindle and the means-for reciprocating the drive spindle. l 7

For purposes of 'disclosure thepreferred :form of the invention is illustra-ted in the drawings and will hereinafter he described in detail as applied toa vertical type honing machinabut it is Vto lbe understood that Vthis disclosure is not'intended as a llimitationfof the 'invention to this type oiinachine, `it ibei'ng contemplated that various changes might be made by vthose skilled in the art' -to adapt the invention to other ytypes 'of machines without departing -rom the spirit and Yscope of the Yirrane'ntion as delined by the appended claims.

The invention, 'as herein illustrated, is'applied to va honing machine ofl the vertical type, including a frame structure having a transmission casing l0 supported'on -the'vtop of a column l-l with .a spindle bearing head 'in the form of a vertical cylindricalportion 10a of Athe casing positioned in overhanging vrelation tor-the side 'oithecolumn l Aspli-ned drive `spindle llextends axially through the 'pro'jectingcylindrical portion 101y fof the casing and is movable longitudinally through the casing toward and away from a work support 11a positioned in front of the column 11.

The casing 10 houses suitable reduction and speed change gearing of a well known character, driven by a motor 13 mounted on the column, and including a gear 14e positioned in the cylindrical portion 10a of the casing and engaging the splines 12a of the spindle 12. Vhen a single honing tool 15 is to be rotated by the spindle, the tool may be mounted d1- rectly on the lower end of the spindle 12.

In the use of the machine, the tool 15 is imultaneously rotated and reciprocated within apiece of work such as a cylinder 16, and the reciprocatory movement is obtained by hydraulically operated means. To avoid increasing the overall length of themachine and at the same time apply a true axial thrust to the spindle, I employ two piston and cylinder devices, one on each side of the portion 1050i the casing. Of these devices the cylinders 17 are secured on opposite sides of the casing 10 parallel to the spindle 12, and pistons 17a in said cylinders have their rods 18 connected on opposite sides of the spindle to a head 19 in which the lower end of the spindle is rotatably journaled. Since the pistonk rods 18 are connected to a head 19 eccentrically of the spindle axis, they serve not only to transmit reciprocatory movement to the head and the spindle, but also function to prevent rotation of the head by the spindle. VVVith this yarrangement of the rotating, reciprocating and guiding means, substantially the entire length of the spindle 12 ma be splined whereby to avoid. undue length of the spindle. The only portion of the spindle 12 which does not Vfunction as a sliding connection during reciprocation of the head is that portion which lies between the lower end of the splines 12a and the head 19. Thus the length of the unsplined portion is determined by the position of the gear 14 in the casing v10 and since it is not. dependent upon the size of the machine it may be made of the same length in large or small machines.

In constructing a machine of the character herein disclosed for any given size of Work, it will lbe apparent that within reasonable limits, a transmission casing 10 of the same size and construction may be ernployed and the other elements of the machine may be assembled about the casing 10 to provide for the desired length of stroke of the honing tool 15. To facilitate the assembly of the machine, the cylindrical portion 10a of the casing 10 has transversely extending headers 18a at its upper and lower ends, shaped to receive the cylinders 17 on their opposite sides, and the cylinders are clamped in position by cap screws 20a extending through lugs on the lower cylinder heads 20 and engaging the lower header 18a. The cylinders are held against the upper header 18a by clamps 21 which embrace the cylinders and are detachably secured to the header by cap screws 21a. Rods 22 secured Thus it will be seen that cylinders 17 of various lengths may be secured on the casing 10 without requiring alteration of the casing or its venclosed gearing. The spindle 12 may also be made of any desired length without Vchanging the construction or size of the transmission casing 10 and without altering the arrangement of the gearing enclosed by the casing.

`Also it will be apparent that the construction provided permits of the convenient removal of the head 19. This is of special advantage in that it enables the replacement of one head by another as, for example, when changing from a single spindle head to a multiple spindle head in case it is desired to operate upon two or more cylinders at the same time.

In constructing machines of various sizes, the vertical dimension of the column 11 is, of course, varied and if additional clearance is vdesired between the column and the axis of the tool 15, a forward projection 2li may be formed on the upper end of the column to permit the casing 10 to be mounted or- ,l

Y by pressure fluid supplied at 25 to the cylinders 17 through suitable valve-controlled connections (not shown) leadinglfrom the pump 26 mounted on the column 11 and driven by the motor 13. Y

I claim as my invention: 1. A honing machine comprising, in combination, a column, a work support in front of'said column, a separately formed transmissionccasing detachably secured on said column, said casing having a portion located in overhanging relation to said worksupport, a driven gear in said portion, a. splined spindle extending through said portion and engaging said'y gear, a pair of cylinders, a pair of horizontally extending headers on the top and bottom of said portion, cylinder heads engaging the lower ends of said cylinders'and detachably secured to the lower one of said headers to support the cylinders on said header, clamps embracing said cylinders and detachably secured to the upper header to hold the cylinders against said upper headerin Aparallel relation on opposite sides of said portion, heads for the upper ends of the cylinders, pistons in said cylinders having piston rods extending through .said lower heads, anda transverse member in which the lower end of said spindle is journaled and to which said piston rods are connected on opposite sides of the spindle.

2. A honing machine comprising, in combination, a column, a separately formed transmission casing secured on the top of said column and having a portion projecting over one edge of said column, a gear in said portion, a splined shaft extending through said portion and engaging said gear, a pair of vertically positioned cylinders, heads engaging the lower ends of said cylinders to hold the same against bo-th lateral and downward movement, said heads being detachably secured to opposite sides of said portion Vadjacent the lower edge thereof, brackets engaging intermediate portions of said cylinders and detachably secured adjacent the upper edge of said portion to hold the cylinders in vertical position, heads on the upper ends of said cylinders, tie rods connecting the upper and lower heads of each cylinder,'pistons in said cylinders having piston rods extending through said lower heads, and a transverse member in which the lower end of said spindle is journaled and to which said piston rods are connected on opposite sides of the spindle.

3. A machine of the character set forth comprising, in combination, a column, a work support on the lower end of said column, a separately formed head mounted on the upper end of the column and having a hollow extension disposed vertically at the forward side of the column above said work support, headers at the upper and lower ends of said extension having laterally projecting end portions, a splined spindle extending through said headers centrally thereof, a pair of separately formed hydraulical cylinders, means for clamping said cylinders to said projecting end portions of the head-ers in parallel relation to said spindle, pistons in said cylinders having rods depending therefrom, a cross head rigidly connecting the lower ends of said rods and having the lower end of said spindle journaled therein, and means enclosed within said casing for rotating the spindle during its reciprocation by said pistons.

4. A honing machine comprising, in combination, a Column, a work support at the lower end of the column, a separately formed casing mounted upon the upper end of the column and having a hollow extension at its upper forward end dispo-sed a substantial distance above the lower e-nd of said casing, a splined spindle mounted centrally of said extension and parallel to the column, a pair of separately formed hydraulic cylinders of substantial length, means for clamping the lower end portions of sai'd cylinders rigidly upon opposite sides of said extension with the upper portions of the cylinders projecting upwardly in parallel relation with the fixed my signature.

ALBERT M. JOHNSON.

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