US2024118A

US2024118A - End lapping machine

Info

Publication number: US2024118A
Application number: US29303A
Authority: US
Inventors: Vanderbeek Herbert
Original assignee: Timken Roller Bearing Co
Current assignee: Timken Co
Priority date: 1935-07-01
Filing date: 1935-07-01
Publication date: 1935-12-10
Anticipated expiration: 1952-12-10

Description

10, 1935. H. VANDERBEEK 2,024,118 y END LAPPING MACHINE Fi1ed July 1, 1935 2 sheen-sheet 1 H. VANDERBEEK END LAPPING MACHINE 2 sheets-sheet 21,

Filed July 1, 1935 MMM UM aU/mk QN/ uw ww uw um Ev Illmm, QM Il MI!! u E f MN M MNV E a o n\\ MN um Patented Dec. 10, 1935 END LAPPING MACHINE Herbert Vanderbeek, Canton, Ohio, assigner to The Timken Roller Bearing Company, Canton, Ohio, a corporation of Ohio 5.

Application July 1, 1935, serial No. 29,303

' e claims.' (ol. -5'1-,129i

My invention relates to lapping machines, par.

ticularly to a machine for lapping the ends of tapered bearing rolls and otherA conical articles. The invention has for its principal object the 5 rapid and accurate end lapping of such articles at low cost.

'I'he invention consists principally in a roll end lapping machine comprising a. rotary lap of spherically concave curvature and a pair of opl posed rotary feed disks projecting into said lap and arranged to feed a roll thereacross. 'Ihe in vention further consists in the end lapping machine and in the parts and combinations and ar rangements of parts hereinafter descrbedand claimed.

In the accompanying drawings which form a part of this specification and wherein like symbols refer to like parts wherever they occur,

Fig. 1 is a front elevation of a lapping machine embodying my invention,

Fig. 2 is a side elevation,

Fig. 3 is a longitudinal vertical sectional view on the line 3-3 of Fig. 2 showing the resilient mounting of one of the feed wheels,

Fig. 4 is a vertical sectional view on the line 4-4 in Fig. 3,

Fig. 5 is a fragmentary plan view showing the resilient mounting of the movable disk shaft and Fig. 6 is a partial sectional view on the line 6-6 in Fig. 3.

Fixed on the reduced upper end I of a vertically disposed shaft 2 and enclosed by a suitable housing portion 3 of the machine frame 4 is a lapping member 5 having a spherically concave upper lapping surface 6. A pair of opposed axially alined feed disks 1, 8 are mounted to rotate on horizontal axes in opposite directions and at different speeds. Each of said disks 1, 8 has around the outer periphery of its face a frusto-conical band 9 that tapers toward the center of said disk.

Thus the two bands 9 form a feeding'slot of conical shape and one of said disks 8 is provided with resilient means, hereinafter described, forcing it toward the other disk 1. By this arrangement, a conical roll I0 placed in the slot formed by said bands 9 is held in place and has its head or large end forced against the lapping surface 6. The differential rotation of said disks 1, 8 causes said roll to be fed across the lapping surface 6 at a speed depending upon the difference in the speeds of rotation of the two disks. The large end of the roll I0 is thus given a spherically convex lapped surface. y

The drawings illustrate the preferred mechanism for rotating said lap 5 and said feed disks 1,

i provided therefor in the machine frame.

8 and for resiliently mounting said disk 8. Mounted in spaced taper roller bearings Il in a vertically disposed casing I2 in the frame of the machine is a hollow shaft I3 having at its lower end a worm gear I4 that is driven by a worm 5 I5. The lower end of said shaft 2 on which said lap 5 is mounted projects into said hollow shaft I3'and is secured therein by means of a key I6..

Mounted on the upper end of said hollow shaft Y I3 is a bevel gear I1 that meshes with t-wo dial0 metrically opposed bevel gears I8, each of which is mounted on a horizontally extending shaft I9 that is mounted in journal bearings 29 in the machine frame.

Each of said feed disks 1, 8 is mounted on the l5 end of a shaft 2I that extends through a casing 22 that is capable of adjustment in a bore 23 Spaced taper roller bearings 24 support each shaft 2I in its casing. Suitable nuts 25 are mounted on 20 threaded portions 26 of said shaft for holding the bearings 24 in position. The outermost end of each casing 22 is provided with a closure cap 21 that has an upwardly projecting portion 28. One of said caps 21 is provided with a hole 29through 25 which extends a bolt 30 that projects from the head 3l of a screw 32 that extends into a threaded hole 33 in the frame of the machine whereby the cap is firmly held between said screw-head 3l and a nut 34 on the end of said bolt portion 30. 30 Thus, by adjusting said screw 32, the position of said casing 22 and of the feed disk 1 may be changed.

The cap 21 of the other casing 22 for the disk f 8 is provided with a slot 35 into which extends 35 a projecting stud 36 on the endof the adjusting screw -32a for said casing. On the frame on either side of said casing 22 are bosses 31 to which are secured coil springs 38 Whose other ends are secured to projecting pins 39 on said cap 21. By 40 this arrangement of springs 38 and adjusting screw 32a, said casing is permitted endwise movement, the adjusting screw limiting the movement in one direction.

Said lower horizontal shafts I9 are provided 45 with pulleys 40 on their projecting outer ends. 'Ihe shaft 2| that is mounted in the resiliently supported casing has a pulley 4I on its outer -end that is driven by a belt 42 or the like passing over it and the pulley 40 of corresponding lower 50 drive shaft I9. The other shaft 2| has a some` what larger pulley 43. This difference in size between the pulley 4I and the pulley 43 determines the rate of feed of` a roll across the lapping surface 6.

A suitable feed mechanism, illustrated diagrammatically in the drawings, feeds rolls, one at a time, into the space between the feed disks, the rolls entering at the point 44. A guide block 45 engages the end of the roll and guides it into the outer peripheral portion of the lap. As the roll reaches the opposite side of the lap, a suitable pivoted ejecting hook 46 engages it and ejects it from the machine.

It will be obvious that the above lapping machine is a simple and inexpensive machine and that it will quickly and accurately lap the ends of conical rolls, giving them a spherically convex surface. Obviously, numerous changes may be made without departing from the invention, and I do not wish to ybe limited to the precise construction shown.

What I claim is:

1. A lapping machine comprising a rotary spherically concave lap, a pair of spaced opposed disks having the same peripheral curvature as said lap and extending thereinto, and means for rotating said disks in opposite directions and at different speeds, whereby an article held between said disks and against said lap is rotated on its own axis and fed across the surface of said lap to receive a lapped convex surface.

` `2. A lapping machine comprising a, rotary spherically concave lap, a pair of spaced opposed vdisks having the same peripheral curvature .as said lap and extending into said lap with their axes normal to that of said lap, said disks having opposed conical bands forming an annular slot of conical shape for receiving a conical roll and means for rotating said disks in opposite directions and at different speeds, thereby feeding a roll across said lap to lap they end thereof.

3. A lapping machine comprising .a rotary spherically concave lap, a pair of spaced opposed disks 'having the same peripheral curvature as said lap and extending into said lap with their axes normal to that of said lap, said disks having opposed conical bands forming an annular slot of conical shape for receiving a conical roll, resilient means pressing one of said disks towards the other thereby forcing a roll held between said disks into endwise engagement with said lap and means for rotating said disks in opposite directions and at different speeds, thereby feeding a roll across said lap to lap the end thereof.

4. An end lapping machine comprising a frame, a vertical shaft rotatably mounted in said frame, a lap secured to the top of said shaft and having a spherical concave upper lapping surface, a pair of spaced opposite disks having the same peripheral curvature as said lapping aurface and extending thereinto, horizontally disposed rotary shafts secured to the respective disks. a casing for each of said shafts mounted for endwise adjustment in said frame, bearings interposed between said shaftsv and the respective casings, adjusting means for said casings,

,and means for rotating said vertical shaft and said horizontal shafts, said horizontal shafts in opposite directions to each other and at differeritspeeds.

5. An end lapping machine comprising a frame, a vertical shaft rotatably mounted in said frame, a lap secured to the top of said shaft and having a spherical concave upper lapping surface, a pair of spaced opposite disks having the same peripheral curvature as said lapping surface and extending thereinto, horizontally disposed rotary shafts secured to the respective disks. a casing for each of said shafts mounted for endwise adjustment in said frame, bearings interposed between said shafts and the respective casings, adjusting means for said casings, the adjusting means for one casing permitting endwise movement thereof, resilient means forcing said movable casing in the direction to move its disk towards the other disk and means for rotating said vertical shaft and said horizontal shafts, said horizontal shafts in opposite direction to each other and at different speeds. 6. An end lapping machine comprising a frame, a vertical shaft rotatably mounted in said frame, a lap secured to the top of said shaft and having a spherical concave upper lapping surface, a pair of spaced opposite disks having the same peripheral curvature as said lapping surface and extending thereinto, horizontally disposed rotary shafts secured to the respective disks, a casing for each of said shafts mounted for endwise adjustment in said frame, bearings interposed between said shafts and the respective casings, adjusting means for said casings, a hollow vertical shaft having a gear at its upper end and having the lower end of said flrst vertical shaft fixed therein, 'horizontal drive shafts in 45 alinement with said disk carrying shafts, gears of equal size at the inner ends of said shafts meshing with said gear on said hollow shaft, pulleysI of equal sizes on the outer ends of said shafts pulleys of different sizes on the outer ends 4of said diskscarrying shafts and belt' connecting HERBERT VANDERBEEK.