US1328409A - Cylinder-forming machine - Google Patents

Description

H. L. WEED CYLINDER FORMING MACHINE.

APPLICATION FILED MAY 11, 1911.

1,328,409, Patented J an. 20, 1920.

2 SHEETS-SHEET l.

Hal/ward L. W660,

H. ,L. WEED.

CYLINDER FORMING MACHINE.

APPLICATION FILED MAY11,I917.

Patented J an. 20, 1920.

2 SHEETSSHEET 2.

till: I

Howard L. Ween, I

afiozncvs UNITED STATES PATENT OFFICE.

HOl/VARD L. WEED, F DETROIT, MICHIGAN.

CYLINDER-FORMING Iv'IACHINE.

Application filed May 11, 1917.

To all whom it may concern:

Be it .znown that l, Howl-inn L. Vfnnn, a citizen of the United States, and residing at Detroit, in the county of l llayne and State of Michigan, have invented a new and Improved Cylinder -Forming Machine, of which the following is a specification.

In forming the cylinders of rotary en gines and other devices that include an an nular cylinder of circular cross-section it has been customary to divide the casing and bore the half-c ndrical surfaces separately. When the par 3 so formed are assembled, the meeting edges of the half-cylinders very seldom exactly register with one another and it has therefore been difficult to secure a close seal between. the pistons and the cyliderwall.

To the end of overcoming the objection above stated, the present invention consists in means for boring, gr nding or dressing the entire surface. of the cylinder in one op eration by means of a tool which rot-ates about the axis of the cylinder. The tool and cylinder, of course, have relative movement longitudinally of said axis. The invention also consists in a boring, grinding or linishing tool mounted to swing about the axis of a shaft which is itself arranged (to-axially with tie bearings upon which the engine shaft to be finally carried, said tool also being rotatable about the a is of the annular cylinder or, in other words, in a plane which includes the axis of the shaft. in the embodiment shown, the engine casing is lined and the tool swings about its axis, but the ruction might be reversed to cause the g to rotate while the tool remains in a listed plane. The essential condition is that a relative movement be established. Again, the invention consists in a particular form of driving mechanism'for the tool; it fur ther consists in the details of construction shown, described and claimed. The invention also consists in an improved process or method for grinding the cylindrical surface.

In the drawings, Figure 1 is a fragmentary longitudinal section showing the device in position within the casing of a rotary engine. Fig. 2 is a perspective view of the hollow main shaft. Fig. 8 is a section on the line 3-3 of Fig. 1. Figs. l and 5 are end and side views of a hood or casing element that may be used for the bevel gears, and Figs. 6 and 7 are similar views of another Specification of Letters Patent.

Patented Jan. 20, 1920.

Serial No. 182L994.

casing element for deflecting droppings from the worm and worm wheel.

1 and 2 designate the half sections of the casing the actual construction of which may vary widely. The end walls 3 of the sections are shown provided with alined annular flanges 4 (previously accurately finished) in which an engine shaft, not shown, is to be ultimately supported on suitable bearings. The sections of the casing are shaped roughly to form half annular cylinders 5 and 6 with perforated flanges 8 through which bolts 9 may be inserted to draw the sections toward each other. A space is left between the inner margins 10 of the cylindrical surfaces to receive the rotor or rotors, or he like. The casing is usually provided with one or more peripheral passages 11 leading to the cylinder, which, during the boring or grinding operation, are preferably arranged at the bottom to allow the cuttings or dust to drop out freely.

Mounted to rotate in the flanges l is a hollow shaft 12 which is slowlyturned by any desired means, for example, by the gears 13 and 14 and the shaft 15. Rig-idly secured on the central portion of the shaft in any suitable way is a radial arm 18 having a divided end, the fur- cations 19 and 20 of which project through the slot between the faces 10 and support a shaft 21, a suit able bushing or hearing 22 being employed, if desired. This shaft carries a tool which may be of any type suitable for borgrinding or otherwise dressing or linishing the cylinder, the working surface of the tool being arranged in a plane that sub stantially includes the axis of the shaft 12.

Various n'iea-ns may be employed for 'lriv ing the tool but it is preferred to use the bevel. gears 26 and 28, the shaft 29 {parallel to the plane of the rotating tool), the worm wheel 30, the Worm 31 and worm shaft 32 that may be rapidly driven by the pulley 33 and belt 3%. A portion of the wall of the hollow shaft is removed as indicated at 35, Fig. 2, to allow the worm wheel to mesh with the worm. Suitable bearings 38 are of course, provided for the worm shaft.

. In order to exclude cuttings and dust from the gears 26 and 28, a detachable hood 40, which may be partly filled with lubricant, is provided; likewise a hood or shield 41 may be employed for deflecting the cuttings away from the worm and worm wheel.

In use, the gear 13 and the pulley 33 are removed, and the casing sections are slipped onto the ends of the shaft 12. The bolts 9 are inserted but are drawn up at first only far enough to cause the tool to take the roughing cut, and are thereafter gradually tightened, as will be readily understood. The tools are changed as required, the bolts being unscrewed for the purpose.

It is obvious that the details of construction may be changed within wide limits without departing from the spirit of the invention, and I do not, therefore, wish to be limited otherwise than as indicated by the subjoined claims.

I claim 1. Means for forming a cylindrical surface having a circular axis comprising a hollow shaft and means to continuously rotate it in one direction, a second shaft within the hollow shaft and means to continuously rotate it in one direction, an arm secured to the hollow shaft, a cutting tool and a shaft therefor journaled in the outer end of said arm in a plane at substantially right angles to the axis of the hollow shaft, and means to drive the cutting tool from said second shaft.

2. Means for forming a cylindrical surface having a circular axis comprising a hollow shaft and means to continuously rotate it in one direction, a second shaft within the hollow shaft and means to continuously rotate it in one direction, an arm secured to the hollow shaft, a cutting tool and a shaft therefor j ournaled in the outer end of said arm in a plane at substantially right angles to the axis of the hollow shaft, and means to drive the cutting tool from said second shaft, said means comprising a fourth shaft extending from the hollow shaft to the cutter shaft, bevel gears connecting the fourth shaft to the cutter shaft and a worm and worm wheel connecting the fourth shaft to the second shaft.

3. Means for forming a cylindrical sur face having a complete circular axis comprising a rotatable support and bearings therefor, means to continuously rotate the support in one direction, a shaft within the support, an arm on the support, a rotatable cutter mounted at the outer end of the arm on an axis coincident with said circular axis, and driving means connecting said cutter and said shaft.

4. Means for forming an annular cylin drical surface, comprising a shaft having its axis co-incident with a line perpendicular to the plane of the circular axis of said surface at its mid-point, said shaft being arranged to cooperate with the material to be worked upon to hold the parts in proper relative position, a tool supported by the shaft and positively rotated about the axis of said surface, and means for establishing relative rotation between the shaft and said material about the axis of said shaft.

5. Means for forming an annular cylinder having a circular axis, said means comprising a hollow shaft arranged centrally of and at right angles to the surface inclosed by the circular axis, an arm attached to said shaft, a tool carried by said arm, said tool being rotatable about the circular axis, means for swinging the shaft about its axis, and means, including a second shaft projecting into the hollow shaft, for rotating the tool at an angular speed greater than that of the hollow shaft.

6. Means for forming an annular cylinder having a circular axis, said means comprising a hollow shaft arranged centrally of and at right angles to the surface inclosed by the circular axis, an arm attached to said shaft, a tool carried by said arm, said tool being rotatable about the circular axis, means for swinging the shaft about its axis, and means for rotating said tool, including a second shaft projecting into the hollow shaft, a worm on said second shaft, a third shaft parallel to the arm, a worm wheel on said third shaft and driven by said worm, a fourth shaft carried by said arm, said fourth shaft being at right angles to the third shaft and supporting the tool, and means for driving the fourth shaft from the third shaft.

7. Means for forming an annular cylindrical surface, comprising a hollow shaft having its axis co-incident with a line perpendicular to the plane of the circular axis of said surface at its mid-point, said shaft 100 being arranged to cooperate with the material to be worked upon to hold the parts in proper relative position, a rotatable tool supported by the shaft, means for establishing relative rotation between the shaft 105 and said material about the axis of said shaft, and means for positively rotating said tool about the circular axis of said surface, said last named means including a shaft entering the opening in the hollow 110 shaft.

HOWARD L. WEED.

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