US1750885A - Milling machine - Google Patents

Description

March 18, 1930.

J. GOETZ ET AL MILLING MACHINE Filed Feb. 6. 1926 3 Sheets-Sheet l INVEN TORS I Johl 'C7oefz BY Lawrence cl fiadermacfier WMMMM ATTORNEYS J. GOETZ ET AL 1,750,885

MILLING MACHINE March 18, 1930.

3 Sheets-Sheet 2 Filed Feb. 6. 1926 rerzce J- Fade/member y Law W MMFfl/MM ATTORNEYS March 18, 1930. J. GOETZ ET AL 1,750,885

' MILLING MACHINE I Filed Feb. 6. 1926 3 Sheets$h eet 3 INVENTOR- John @0672 BY Lawrence J Flaaermac/rel" MMMM A TTORNEYS Patented Mar. 18, 1930 UNITED STATES PATENT OFFICE JOHN GOETZ, F WAUWATOSA, AND LAWRENCE J. RADERMACHER, 0F MILWAUKEE, I

WISCONSIN, ASSIGNORS TO THE KEMPSMITH MAN UFACTUBING CO, OF WEST ALLIS, WISCONSIN, A CORPORATION OF WISCONSIN MILLING Application fil ed February construction, and to provide means for sup-' porting and operating the master cam in such wise that the latter acts directly upon the table to control the movement thereof and the work-holding member secured thereto.

. Another object is to provide improved.

means of the character referred to with driving shafts for the parts comprising said means and a shaft common to and directly connected to these driving shafts for operating the same.

Another object is to provide an improved attachment of the character referred to hav-' in advantages over those constructed hereto ore as regards simplicity of construct-ion,

manner of operation, accuracy, and flexibility of operation.

Other objects and advantages will hereinafter appear.

For the purpose of illustrating the invention, an embodiment thereof is shown in the drawings, in which Figure 1 is a front elevation, partly broken away, of a standard milling machine showing the improved attachment applied thereto;

Fig. 2 is a plan view, partly broken away;

Fig. 3 is a side elevation, partly broken away, and looking toward the left in Fig. 1;

Fig. 4 is an enlarged fragmentary view taken from Fig. 2 and looking toward the left with respect to Fig. 2; and

Fig. 5 is a diagrammatic, perspective view of the driving connections.

The milling machine shown is of standard construction and includes the usual base 1 supported by a screw 2 for vertical adjustment, a tool 3 supported over the base for rotation about a vertical axis, a driving gear 4 arranged in a protective casing 5, a casing 6 containing a suitable electric motor for driving tool 3 and gear 4, a guard 7 for the MACHINE 6, 1926. Serial No. 86,395.

driving connection between the motor and gear 4, and a table 8 supported by base 1 below tool 3 for forward and backward movement with respect thereto, all of Whichparts are of common construction and have only been shown in suflicient detail to enable those skilled in the art to understand the manner in which they are related to the respective parts comprising the improved cam attachment and the driving or operating means therefor.

A member 9 is secured to table 8 by means of bolts 10 and 13 and is provided with bearings 14 and 15 for a worm shaft 16 provided at one of its ends with a beveled gear 17 and having its other end 18' shaped to receive a suitable wrench. A work-holding table 19 is fitted upon member 9 for rotary movement 1 about a vertical axis, the table being provided on the underside thereof with a worm wheel 20 meshing with and being driven by worm shaft 16. Member 9 is further provided with bearings 21, 22 and 23 for a shaft 24 on which are loosely mounted beveled gears 25 and 26 arranged in constant mesh with beveled gear 17 a clutch member27 being splined on shaft 24 and arranged for interlocking engagement with either of the beveled gears 25 and 26, as more clearly shown in Fig. 4, whereby the rotation of shaft 16 may be reversed to reverse the direction of rotation of the workholding table 19. For the purpose of shifting clutch member 27, a cam 28 is arranged in an annular groove with which this member is provided, and is fixed to a pin 29 loosely mounted in member 9 intermediate beveled gears 25 and 26, an arm 30 being also fixed to pin 29 and provided at its free end with teeth meshing with similar teeth formed on the underside of a lever 31 pivotally mounted on a pin 32 fixed to member 9, the arrangement being such that upon movement of the lever to its extreme position to the right, as shown in Fig. 4, a clutch member 27 will engage beveled gear 26 to connect the sameio shaft 24 for rotation therewith, while movement of the lever to its extreme position to the left will effeet engagement of the clutch member withbeveled gear 25 to connect the same to shaft 24 for rotation therewith, the

clutch member moving out of interlocking engagement with either of the beveled gears before it enters into interlocking engagement with the other. i

From the foregoing it will be seen that-- upon rotation of shaft 24, the work-holding table 19 may be rotated in either direction upon the shifting of clutch member 27 by means of lever 31. The work or cam blanks 33 may be secured to the work-holding member or table 19 by means of bolts 34 passing through these blanks, the heads of the bolts being arranged in the usual T-shaped slots which the housing is provided. Intermediate its ends, shaft 39 is provided with a worm wheel 42 fixed thereto and meshing with a worm shaft 43 journaled in a bearing 44 with which the housing is provided and being driven from gear 4 through a similar gear 45 fixed to a shaft 46, and shaft sections 47 and 48 connected, respectivelv. to shaft 46 and worm shaft 43 by universal couplings 49 of any suitable construction.

Secured to one end of base 1 by means of bolts 50 is a shelf or bracket 51 upon which a table 52 is supported for rotation about a vertical axis, bracket 51 being provided with an annular inwardly extending flange 53 upon which table 52 rests, the flange being arranged, as more clearly shown in Fig.

1, between table 52 and a worm wheel 54 secured thereto in any suitable manner, the

worm wheel thus acting to hold table 52 in operative relation with respect to bracket 51, while permitting free rotation of the table with respect to the bracket. A shaft 55 1s journaled in bracket 51, as shown, and 1s provided with a worm portion 56 meshmg with worm wheel 54, shaft 55 being further pro-' vided at onefend thereof with a worm wheel 57 meshing with a worm portion 58 with which the vertical driving shaft-39 is provided, as more clearly shown in Fig. 5. A master cam 59is secured to table 52 by any suitable means such as a bolt 60 passing through the axis of the cam and the vertical axis of rotation of the table, and other bolts 61 for holding the' master cam against rotary movement with repect to the table about bolt- 60 as a center. As more clearly shown in Figs. 1 and 3, a'vertical bolt 62 provided at its lower end with a roller or cam follower 63 i's supported by a bracket 64 fixed to the A adjacent end of table 8 by meansof bolts 65, roller 63 beina arranged to engage the periphery of master cam 59- and being held in masses close engagement therewith by means about to be described.

A weight 66 is suspended by chains 67 trained about pulleys 68 and 69 carried by plates 70 secured to base 1 by means of bolts 71, and pulleys 72 and 73 rotatably mounted upon pins 74 fixed in the end of table 8, the chains being fixed at -75to plates 70, the arrangement being such that table 8 is urged to the right, as viewed in Fig. 1, and the roller or cam follower 63 held in close engagement with the periphery of the master cam by a force equal to twice the weight of weight 66. By using the chain and arranging the pulleys 68, 69, 7 2 and 73 as shown in Figs. land 2, the resultant force acting to urge table 8 to the right is coincident with the longitudinal center line of the latter, bolt 62 and roller 63 being arranged with their vertical axes coincident with this longitudinal center line, as more clearly shown in Fig. 2. From the foregoing it will be seen that the forces acting on table 8 to control the movement thereof are equally distributed with respect to the longitudinal center line of the same and that through the roller or cam follower 63, the master cam 59 acts directly upon table 8 to effect forward and backward movement thereof and of the cam blanks 63 in exact accordance with the shape of the master cam.

An adjusting feed screw 76 threaded into a member 77 secured to member-.9 by means of bolts 7 8 is journaled at its outer end in a bearing 79 secured to table 8 by means of screws 80, the feed screw being provided with a suitable collar 81 and an indicating dial 82 arranged on opposite sides of bearing 79 to prevent axial movement of the feed screw with respect to the bearing so that upon rotation of the former in either direction by means of the crank or wrench 83, member 9 and the work-holding member or table 19 and cam blanks 33 secured to the latter are cam blanks 33 adjusted with respect to tool 3 by applying a wrench to end 18 of shaft 16 and rotating the same in the desired direction, feed screw 76 providing means for adjusting the work longitudinally with respect to table adjusted longitudinally with respect to table 8. Clutch member 27 is then engaged with 1 aither of the beveled gears 25 or 26, dependmg upon whether a right or left cam is to be made, and the usual driving motor of the machine located in casing 6 started to drive tool 3 and the common drive shaft 39 for shafts 24 1 and 55, the relation of the various worm shafts and worm gears being such that work table .19 and master cam 59 are rotated at exactly the samerate.

The improved cam attachment may -removed by moving bolts and 13, housing 36, bolts 50 and 65, and the housing 83 for gear 45 and shaft 46. 1

From the foregoing it will be seen that an improved attachment has been provided which may be readily applied to a milling machine of standard construction to adapt the same for the cutting of cams, that a common drive shaft 39 is provided for the respecstive driving shafts 24 and 55 for the master cam and work table, the common drive shaft 39 being directly connected to the latter, that the feed screw 76, clutch member 27 and actuating lever 31 therefor and the exposed end 18 of worm shaft 16 provide means for adj ustin the work with respect to the tool and e ecting rotation of the work in either direction for the cutting of right or left cams, that the action and arrangement of the roller or cam follower 63 is such that the master cam 59 acts directly upon table 8 to effect the forward and backward movement thereof, and that the improved cam attachment has advantages over those constructed heretofore as regards simplicity of construction, flexibility of operation and accuracy.

One embodiment of the invention has been shown and described, but of course various changes may be made in the size, shape and arrangement of the parts without departing from the spirit of the invention or the scope of the claims.

The invention claimed is:

1. In a milling machine, a base, a tool supported above said base for rotation about a fixed axis, a work-holding member supported by said base for forward and backward movement with respect thereto and for rotation about an axis parallel to the tool axis, means.

including a master cam for controlling said movement of said member, a first shaft for effecting rotation of said member, a second .shaft for operating said means, and a third shaft common to and directly connected to said first and second shafts for driving the latter, and means for driving said third shaft.

2. The combination with a milling machine having a table supported for reciprocatory movement and a tool supported for rotation about an axis transverse to said table, of a Work-supporting member carried by said table for rotation about an axis parallel to the tool axis and fixed with respect to said table, means for selectively rotating said member in reverse directions, and means for causing said movement of said table to vary the relative positions of said axes with respect to each other in a predetermined way.

3. The combination with a milling machine having a table supported for reciprocatory movement and a tool supported for rotation about an axis transverse to said table, of a member supported by said table for adjustment longitudinally thereof, a work-holding plate seated upon said member and rotatable with respect thereto about an axis parallel to the tool axis and fixed with respect to said member, said plate being provided on the un derside thereof with a worm wheel, a shaft journaled in said member and provided with a worm portion meshing with said worm wheel, a drive shaft journaled in said member, means for connecting said worm shaft to said drive shaft for rotation thereby in either direction, said means permitting rotation of said worm shaft independently of said drive shaft, means for causing said movement of said table to vary the relative positions of said axes with respect to each other in a pre determined way, and operating means for said drive shaft.

4. In a machine of the character described, a table supported for reciprocatory movement, a tool supported for rotation about an axis transverse to said table, a work-holding member supported by said table for rotation about an axis relatively fixed with respect thereto and parallel to said tool axis, a master cam supported for rotation about an axis parallel to the tool axis and relatively fixed with respect thereto, means fixed to said table and engaging the periphery of said cam for causing said movementof said table in accordance with the shape of said cam, means acting upon said table for holding said lastnamed means in close engagement with the cam periphery, a housing, a shaft arranged and ournaled in said housing, a second shaft for driving said member, a third shaft for driving said cam, said second and third shafts extending into said housing into driving en gagement with said first-named shaft, and

operating means for said first-named shaft.

5. In a machine of the character described,

the combination with a base, a table supported by said base for reciprocatory movement, and a tool supported for rotation about an axis transverse to said table, of a bracket arranged below said table and fixed to said base, a master cam supported by said bracket for rotation about an axis parallel to the tool axis, means for rotating said cam including a worm shaft journaled in said bracket, a cam follower fixed to said table and engaging the periphery of said cam, means acting upon said table for holding said follower in close engagement with the cam periphery, and means on the upper side of and associated with said table for holding work in cutting relation with respect to said tool and for rotation about an axis arallel to the tool axis and relatively fixe with respect to said table, and means for operating said last-named means and said cam.

6. In a machine of the character described, thecombination with a base, a table supported by said base for reciprocatory movement, a tool, means associated with said table for holding work in cutting relation with respect to said tool, and means including a master cam and follower for controlling said movement of said table to vary the position of the work with respect to said tool in accordance with the shape of said cam, of a pulley supported for rotation about an axis fixed with respect to said table a second pulley supported for rotation about an axis fixed with respect to said base, a flexible element fixed at one end thereofto said base and trained about said pulle s, and means acting upon the other end 0 said element with a given force to place the latterunder tension, the arrangement being such that said element acts to urge said table in a given direction and to hold said follower in close en agement with the periphery of said cam with a force equal to twice said given force.

7. In a machine of the character described, a table, means for supporting said table for reciprocatory movement, a work-holding member operatively connected to. said table and supported thereby for rotation about an axis transverse thereto and relatively fixed with respect to the same, the-operative connection between the work holder and the table being immediately ad'acent to the table supporting means where y to minimize deflection, a tool supported in cutting relation with respect to said member and for rotation about an axis parallel to saidfirst-named axis, a master cam supported independently of and adjacent one end of said table for rotation about a relativel fixed axis parallel to the tool axis and su stantially coincident with the plane defined by said first-named axes,

means fixed to said table and en aging the periphery of said cam at a point substantially in said plane, means urging said table in a direction to hold said last-named means in close engagement with the cam periphery, and operating means for said tool, said member and said cam.

8. In a machine of the character described, a base, a table supported by said base for reciprocatorymovement in a horizontal plane, a tool supported above said table for rotation about a fixed vertical axis, a work-holding member carried by said table for rotation about a vertical axis fixed relatively with respect to said table, a master cam arranged below said table adjacent one end thereof and supported for rotation. about a vertical axis relativel fixed with respect to said base and bein su stantially coincident with the plane defined by said first-named axes, a cam follower fixed to said table at said end thereof and engaging the periphery of said cam at a point'disposcd substantially in said plane, means acting upon said table to urge the same in a direction to hold said follower in close engagement with the cam periphery, a first shaft for operating said member, a second shaft for operating said cam, a third shaft common to said shafts and engaging the latter directly for driving the same, and means for driving said third shaft.

, 9. A cam cutting attachment for use on milling machines including a base and table supported on said base for back and forth movement and a tool cooperably disposed with respect to said table, and comprising a work supporting member mounted on the upper side of the table for rotary movement with respect to the table, means for rotating the work supporting member in either direction, a master cam mounted on said base for rotary movement and located adjacent one end of the table and in a plane closely ad 'acent to the juncture of the table with the ase, means for rotating the master cam, a follower connected to one end of the table and engaged with the master cam, and means for biasing the table to cause the follower to engage the master cam at all times.

10. A cam cutting attachment for use on milling machines including a base and table, said table and said base having inter-fitting guide means whereby the table is slidably I supported on the base for back and forth movement, and a tool cooperably disposed with respect to said table, andcomprising a work supporting member adapted to be mounted on the upper side of the table for adjustment longitudinally thereof, means for effecting longitudinal adjustment of said work supporting member, said work supporting member having a work holding element rotatable with respect thereto, means for selectively rotating said work holding element in reverse directions, a rotatable master cam supported on said base immediately adjacent the interfitting guide means for the table, means for rotating said master cam, a follower adapted to be carried by'the table and cooperable with the master cam, and means for biasing the table to cause the follower to engage the master cam at all times.

11; In a machine for cutting cams or the like, the combination of a base, a table adapted to reciprocate thereon, a work supporting member mounted on the top of the table, a cutting tool mounted on the frame above the table, yieldable means tending to move the table in one direction to maintain work supported on the member in engagement with the cutting tool, and a templet and follower arrangement for actuating the table in opposi- JOHN GOETZ. LAWRENCE J. RADERMAGHER.

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