US1608154A

US1608154A - Expansion burnishing tool

Info

Publication number: US1608154A
Application number: US113425A
Authority: US
Inventors: Jacob B Anderson
Original assignee: Individual
Current assignee: Individual
Priority date: 1926-06-03
Filing date: 1926-06-03
Publication date: 1926-11-23
Anticipated expiration: 1943-11-23

Description

Nov. 23

J. E. ANEERSN BXPANSIGN BURNISHNG T001r Filed June 1.926

Patented Nov. 23, 1926.

llllll'lE JACOB B. ANDERSON, 03E' IJIERRILL, IOVJA.

EXPANSON BURNISI-IING TOL.

Applicatin filed .Tune 3, 1926.

My invention relates to a tool for sizing the inner diameters of wrist pin bearings, and the like, and it is my object to provide such a tool of simple, durable and inexpensive construction, in which the action upon the bushing of the bearing is produced by a burnishing process as opposed to cutting.

More particularly it is my object to provide a tool for use in working upon material such as bronze or babbitt, the burnishing being done by bit or Wedge having a rounded face adapted to Contact with the material of the bearing.

A further object is to provide such a tool having a removable bit of wedge-shape, actuated by an adjusting element, a novel connection being had between the adjusting element and the bit, whereby the bit may be retracted by a pin and slot connection, and positive pressure be transmitted to the bit directly 'l'or expanding the same.

With these and other objects in view, my invention consists in the Construction, arrangement and combination of the various parts oi my device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claim and illustrated in the accompanying drawings, in which:

Fig. 1 is a plan view of the tool.

Fig 2 is a sectional view illustrating the tool received in a bearing.

Fig. 3 is a transverse sectional view taken through the line 3 3 of Fig. 2.

Fig. is a detail sectional view taken on the line ll-Ll of Fig. 2.

l have discovered that by using a` suitable rotatable burnishing 'tool a hard glazed iinish can be given to a bushing such as bronze, or babbitt, which has better wearing qualities than the finish produced by cutting. The metal in such an operation is compressed to give the bushing the proper size.

l have used the reference char cter 10 to indicate the wrist pin bearing of a connecting rod, and the reference numeral 11 to indicate the bronze bushing therein.

The burnishing tool comprises a plug` or shaft, 12, having a reduced portion, 13, and an enlarged collar, 14, the latter to prevent the tool lrom dropping through the bushing when the tool is used in an upright position. .el squared head, 15, is designed to receive a wrench for rotating the plug.

A slot, 16, is cut longitudinally in the plug and receives a wedge-shaped bit or burnish- Sclial No. 113,@2'5.

ing wedge, 17. The slot, 16, is cut upon the slant to correspond with that or the wedge, 17 so that the outer edge or' the wedge will remain parallel to the anis of the plug. This outer edge is linished upon a curve. as at 18 (see Fig. 3), the curve being of much less diameter than the bushing into which the tool is inserted. "A

The diameter of the plug, 12, is very little less than that of the bushing, 11. l lind that better results are thus obtained.

I provide a very simple means l'or moving the wedge longitudinally in the slot, 1G, in order to adjust it radially ot the plug, An opening, 19, is tapped into the end oi the plug, and this opening is threaded, as at 20,- during a portion of its length. it rod, 21, having a reduced shaft portion.I 22, is slipped into the opening, 19, and thence extended rearwardly through the end of the plug. A threaded sleeve, 23, is then received over the reduced portion, 22, and the end of the reduced portion swaged down, as at 2li- The threaded sleeve, 23, has an axial head, 25, to receive a wrench for rota ing the sleeve.

The pin, 26, on the rod, 21, prevents removal oi" the rod from the tool, and serves to tit within slot, 27, in the butt end-of the wedge, 17.

A notch is cut in the end of the wedge, 1T, below the slot, El?, to form a shoulder, Q8, which is received against the end of the rod, 21. i

l/Vhen the rod is moved inwardly in the plug, the pressure trom the end thereof transmitted to the shoulder, 2S, to torce the wedge outwardly against the surface which it engages. When the rod is moved in the other direction tle wedgeI is retracted by means o the pin and slot connection.

A series oi' gauge marks, 29, are provided on the reduced portion, 13, and the end ot' the wedge, 17, coacts therewith to indicate the amount of expansion.

The wedge is held in place by a set screw, 81, which coacts with a slot, 3Q, in the wedge, parallel to the lower edge thereof. The wedge may be removed by removing the screw.

Some changes may be made in the construction and arrangement oi the parts of my invention without departing from the real spirit and purpose of my invention, aud it is my intention to cover by my claim any modified forms ot structure or use ot meehanieel equivalents which may he reesonably included Within their scope.

I claim as my invention: i

In a, device of the class described, e. cylin drieel plug having a longitudinally inclined slot, an axial opening in the end of Jehe plug communicating with seid slot, said opening being threaded, a` lournishing` Wedge slidah-ly received in the slot, said Wedge having e slot and e shoulder at its butt end, e rod having a pin received in the slot of said Wedge, sind `iis end engaging seid shoulder, fsaid rod being slidably mounted `in the threaded opening and having a reduced portion, a, threaded sleeve receiving` said reduced peiI- tion and threaded into the threaded opening, Ineens `for transmitting rotating Inovenient to seid sleeve, land Ineens for traneinitting rotating movement to the plug.

Signed in the county of Plymouth and State oi'lowa, thisv 27th dey of May, 1926.

' JACOB B. ANDERSONL