US3057123A - Work reciprocating mechanism for tape honing machines and the like - Google Patents

Description

Oct. 9, 1962 T. H. SLOAN 3,057,123

WORK RECIPROCATING MECHANISM FOR TAPE HONING MACHINES AND THE LIKE Filed Aug. 19, 1960 2 Sheets-Sheet l IN VEN TOR.

BY Wm 4M Oct. 9, 1962 T. H. SLOAN WORK RECIPROCATING MECHANISM FOR TAPE HONING MACHINES AND THE LIKE Filed Aug. 19, 1960 2 Sheets-Sheet 2 BY 7% AW W27 United States Patent 3,057,123 WORK RECIPROCATING' MECHANISM FOR TAPE HQNING MACHINES AND THE LIKE Theodore H. Sloan, Charleroi, Pa., assignor of one-quarter to William B. Jasper-t, Upper St. Clair, Pa. Filed Aug. 19, 1960, Ser. No. 50,630 4 Claims. (Cl. 51151) This invention relates to new and useful improvements in apparatus for honing circular bodies by abrasive tape and it is among the objects thereof to provide apparatus for rotatably supporting the objects to be honed in a manner to be movable on their supports in contact with an abrasive tape, the cylindrical bodies being movable along their own axis across the face of the tape while the latter is moving tangentially to the surface of the cylindrical body. In a co-pending application serially numbered 854,740, filed November 23, 1959, now Patent No. 3,021,- 648, granted February 20, 1962, I have disclosed a method of honing cylindrical bodies by abrasive tape in which the bodies are fed to a pair of pinch rolls that act as a support while revolving said bodies in contact with the abrasive surface of the tape, the tape being mounted on a honing shoe that is subjected to reciprocal motion to move the tape across the face of the rotating cylindrical object being honed.

In accordance with the present invention, the honing tape which may be fed in the same manner as in my former application to apply an abrasive surface to the cylindrical body being honed, is not subjected to reciprocatory motion but is held stationary while the object being honed is subjected to reciprocatory motion while rotating on its support.

The invention will become more apparent from a con sideration of the accompanying drawings constituting a part hereof in which like reference characters designate like parts and in which:

FIGURE 1 is a plan view of a portion of a honing machine embodying the principles of this invention;

FIGURE 2, a side elevational view, partially in section, taken along the line 22 of FIGURE 1;

FIGURE 3, an end elevational view taken along the line 33 of FIGURE 2; and,

FIGURE 4 is a cross-sectional view through the pinch rolls and a roller being honed showing a modification of the roller reciprocating means.

With reference to FIGURES l to 3 of the drawing, the numeral 1 designates a portion of a base having a plurality of bearing lugs 2, FIGURE 2, of which there are four for journaling pins 3 and 4, FIGURE 3, the pins 3 and 4 being secured in the bearing lugs by set screws 5. Pivoted on the pins 3 and 4 are bracket 6, which is in the nature of a bell crank having an arm 7, and a bracket 8 having an arm 9. The arm 9 is provided with a slot 10, FIGURE 1, for embracing a bolt 11 having a threaded body portion for receiving nuts 12 and 13 which are adjustable to fix the position of the arm 9, thereby fixing the position of the arm 8 of the bell crank lever. The arms 6 and 8 carry shafts 14 and 15, FIGURE 3, on which are mounted pinch rolls 16 and 17, respectively. The other end of shafts 14 and 15 are provided with sheave wheels 18 and 19 adapted to be connected by a belt with a sheave whel 20 mounted on a shaft 21 having a sheave Wheel 22 driven by belt 23 connected to a drive motor, not shown. The bell crank lever 6 has an arm 25 integrally joined or mounted on the shaft 3 in the manner to rock the arm 6 when subjected to angular movement. The end of the arm 25 is provided with a roller 26 which is a cam follower that engages the cam 27 mounted on shaft 28 having sheave wheel 29 driven by belt 30 so that when the peak 31 of the cam 27 strikes the roller 26 it will displace the arm 6 and remove the pinch roller 16 out of contact with the conical roller 32, which is the object being honed, allowing the latter to fall from its support, which is an anvil 33, into a receiving hopper or chute, not shown. The brackets 6 and 8 are joined by a tension spring 34 which yieldingly holds the pinch rolls in engagement with the work or roller 32, but which allows the pinch rolls to be separated by action of the cam 27 as it strikes roller 26. A set screw 34 constitutes a stop for the arm 7 and the set screw is adjustable to maintain the pinch roll 16 in proper engaging position for different size conical rolls 32 that are being honed.

The sheave wheels 18 and 19 are driven by a drive belt 35, tension of which is maintained by a coil spring 36 attached to the base 1 and to an arm 37 pivoted at 38 on a lug 39 attached to the bottom of the base 1. The extended end of lever 37 has a bearing that holds the pin 21 on which the sheave wheels 20 and 22 are mounted. The pull on spring 36 causes lever 37 to exert tension to maintain the belt 35 taut to drive the pinch or drive rolls 16 or 17 in the manner shown in FIG- URE 3.

With reference to FIGURES 1 and 2, the numeral 40 designates a set screw that constitutes an adjustable stop with a lock nut 41 against which the taper rollers 32 to be honed abut during the honing operation. As shown in FIGURE 2, the set screw 40 is mounted in a bracket 42 carried by a pin 43 that extends through a vertical support 44 extending on the base 1, a guide pin 45 being provided to maintain alignment of the set screw 40 with the taper roller 32.

Bracket 42 is pivotally mounted at 46 to a crank 47 mounted on a crank shaft 48 driven by sheave wheel 49 and a belt 50. The crank shaft 48 is mounted in a bearing 51 having a flanged base 52 resting on machine base 1.

The taper rollers 32 are fed from a chute to their support 33 by mechanism shown and described in my copending application serially numbered 854,740 filed November 23, 1959, and the tapered faces of the roller 32 and the drive rolls or pinch rolls 16 and 17 cause the taper roller 32 to move along its axis as shown by the arrow in FIGURE 1. This movement takes place when the crank arm 47 retracts the set screw 40. However, at the end of the crank movement, the set screw 40 again pushes the taper roller 32 axially in the direction of the conical face of the pinch roll to the position shown in FIGURE 1 and in doing so the surfaces to be honed are moved transversely across the face of a honing tape 52, FIGURE 3, that passes around a stationary shoe 53, the tape being fed to the rounded end 54 of the shoe in the manner shown and described in my aforesaid copending application. In place of the fixed anvil 33 that supports the taper rollers 32, a renewable support of a flexible tape material may be employed as disclosed in my aforesaid co-pending application, now Patent No. 3,021,648.

By means of the above-described apparatus, the roller to be honed is moved along its axis with its surface contacting the abrasive of the honing tape to produce the desired honed finish on the surface thereof. By virtue of the movement of crank 47, the roller 32 is oscillated back and forth between the drive rolls 16 and 17 until the honing has been completed, at which time cam 27 contacts lever 25 and separates the drive wheel 16 from the roller 32 allowing the latter to drop from the anvil 33 and a new roller to be fed between the pinch rollers.

In the modification shown in FIGURE 4 of the drawing, a cylindrical roller 55, instead of a conical roller 32, is mounted between a pair of cylindrical drive rolls 56 and 57 and a pair of adjustable stops in the form of set screws 58 and 59 maintain the positions of the cylindrical roller 55 between the drive rolls 56 and 57. The set screws 53 and 59 are mounted in arms 6i) and 61 and are adjustable by lock nuts 62 and 63. The arms 60 and 61 are mounted in a guide pin 64 slidable in a bracket 57, a guide pin 65 maintaining alignment of the stops 58 and 59 with the end of the cylindrical roller 55. The pin 64 is connected to -a crank and operated in the same manner as the reciprocal guide of FIGURE 2 of the drawing. In the absence of the tapered face, the rolls 58 must be fed in both directions, since there is no squeez ing action to displace the roll as in the case of the taper rolls 9, FIGURES l to 3 of the drawings.

Although several embodiments of the invention have been herein illustrated and described, it will be evident to those skilled in the art that various modifications may be made in the details of construction without departing from the principles herein set forth.

I claim:

1. Apparatus for honing circular bodies comprising a pair of pinch rolls for engaging the body therebetween to rotate the same at suitable honing speeds, an abrasive material mounted to engage said circular body on an exposed surface thereof between said pinch rolls, a bottom support for said circular body and means for subjecting said circular body to reciprocatory movement along its axis while maintaining contact with the abrasive-surface.

2. Apparatus as set forth in claim 1 in which the pinch rolls have conical engaging surfaces for engaging conical shaped rollers and in which the rollers are supported against the pressure of the abrasive material acting thereon and are provided with a stop for engaging the end of the roller, said stop being movable in an axial direction to subject the roller to axial movement While in contact with the abrasive material.

3. Apparatus as set forth in claim 1 in which the pinch rolls are mounted on bell cranks pivoted to a base and a roller support extends vertically from the base in between said pinch rolls, a honing shoe disposed above said rollers in alignment with said vertically extending support, means for adjusting the bell crank of one of said pinch rolls in accordance with the diameter of the taper roller which said pinch roll engages and means for rocking the other of said bell cranks to displace the pinch roll mounted thereon sufficiently to permit the taper roller to discharge from its support.

4. Apparatus as set forth in the next preceding claim in which the pinch rolls or driven to subject the taper roller to proper honing speeds and in which means are provided to drive the bell crank independently of the pinch roll drive means.

References Cited in the file of this patent UNITED STATES PATENTS 2,450,237 Indge Sept. 28, 1948

Images