CINCINNATI CENTERLESS GRINDER MANUAL PDF

CINCINNATI CENTERLESS GRINDER MANUAL PDF

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October 6, 2020

Industrial Machinery Manuals Is Proud To Offer 1 Quality Bound Copy Of A: Cincinnati No. 2 Centerless Grinder Operation Manual This Manual Covers Models. and show actual applications of centerless grinding and also to supply a TWIN GRIPA MICRO-CENTRIC® and CINCINNATI MILACRON® are trademarks of. A further object of this invention is to provide a simplified centerless grinding by the infeed grinding method and the machine is provided with a single manual.

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Cincinnati Centerless Grinder Manuals

In a centerless grinding machine having a grinding wheel and a regulating wheel, the combination of centerleess for supporting the regulating wheel mankal rotation about a normally fixed axis, an oscillatable support having means for rotatably supporting the grinding wheel, said grinding wheel normally being movable by gravity centfrless the regulating wheel, counterbalancing means effective to normally hold the grinding wheel away from the regulating wheel, means for positioning work between the wheels, a control lever and motion transmitting connections from said lever grindef said work positioning means and said oscillatable support for effecting simultaneous movement thereof in directions to cause positioning of the work in a grinding position and movement of the grinding wheel toward the regulating wheel.

In a centerless grinding machine having a grinding wheel and a regulating wheel, said grinding wheel being supported above the regulating wheel, a swinging bracket for supporting the grinding wheel in a manner to normally cause the wheel to move by gravity toward the regulating wheel and resilient counterbalancing means effective on said support for holding the grinding wheel normally in a non-grinding position.

Since the whole weight of the grinding wheel and cindinnati of its driving mechanism is supported on the threaded connection in the extensible link, thereby creating a large amount of friction, when adjustments are necessary and since the eccentric shaft must lift the entire weight of the grinding centerles during grinding operations, means are provided for counter-balancing all of the weight of the grinding wheel so as to provide a definite bias on the grinding wheel support structure in an upward direction, thereby necessitating a slight pull by the operator to move the grinding wheel down during the grinding operation.

A fishtail gib 29 is provided for insuring a tight fit between the guide surfaces, and an adjusting screw 30 and lock nut 3 secure the gib to the slide 21 for movement therewith. By means of the eccentric adjustment of the pulley 47 suitable tension may be obtained in the belts The walls 16 and 77 also support a center,ess blade 81 which has a beveled edge 82 so positioned that the thrust of the grinding wheel forces the work into frictional engagement with the periphery of the regulating wheel.

A further object of this invention is to provide a simplified centerless grinding machine for infeed grinding operations in which the entire cycle of work loading, grinding and work removal may be effected by a single manual control lever.

In a centerless grinding machine having a grinding wheel and a regulating wheel supported in opposition to form a grinding throat therebetween, the combination of an oscillatable work carrier having means for moving work into and out of the grinding throat in a direction lateral of the axis thereof, said carrier having a work rest blade mounted thereon for movement therewith, means for infeeding one of said wheels and a control lever operatively connected for oscillating said carrier and infeeding one of said wheels.

The interior of the machine housing is provided with an angular partition or wall, one portion 18 of which is at a steep angle and this portion intersects the horizontal portion The wall 18 is provided with a dovetailed guideway 20 as centerrless particularly shown in Figure 3 upon which a spindle housing 21 for the regulating wheel 14 is mounted for adjustment. An additional object of this invention is to provide improved means for lateral insertion and removal of work with respect to the grinding throat of a centerless grinding machine.

The pulley 47 serves to drive the grinding grinfer spindle through V-belts 49, and pulley 50 attached to the end of the spindle Trunnion pivots 59 mounted in the ends of the arms 57 fit into suit- s5 ably formed sockets in the opposite sides of the link 58 to form a pivoted connection therewith. The end flanges on the work piece serve to support the work during movement to grinding position until the regulating wheel is engaged, whereupon the regulating wheel lifts the work sufficiently to support the entire weight thereof without ceenterless the work so far that the guides 78 cannot function to center the work piece with respect to the grinding wheel and insure that the grinding wheel engages the surface 80 without contacting the sides of the end spools and the work.

This adjustment is effected by an adjusting screw 22 which is threaded in the housing at 23 and held against axial movement by means of an annular flange 24 which partially fits in a groove 25 formed in the face of the guideway A SumoBrain Solutions Company.

United States Patent The annular surface 80 between the end flanges of the work is the surface to be ground and the grinding wheel 12 is made of sufficient width to engage the entire surface so that the grinding operation may be performed by what is known in the art as the infeed grinding method.

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In a centerless grinding machine having a grinding wheel and a regulating wheel adjustably mounted in opposed relation to form a grinding throat therebetween, the combination of oscillatable means for inserting and withdrawing work laterally of the grinding throat, said means including a work rest blade for absorbing grinding thrust on the work, and a control lever operatively connected for actuation of said means and adjustment of one of said wheels.

Another object of this invention is to provide a single cycle centerless grinding The sleeve 60 is manually adjusted by the knurled wheel 66 attached to the upper end of the sleve 60, and the amount of adjustment is indicated by the micrometrically graduated dial 67 which is attached to the sleeve for rotation therewith.

Cincinnati No. 2 Centerless Grinder Operation Manual

Click for automatic bibliography generation. From Figure 3 it will be noted that the eccentric portion 64 of the shaft is integral cincinnatii the remaining portion of the shaft and that a manually operable handle 90 is attached to the end of the shaft to effect rotation thereof. The spindle 32 for the regulating wheel 14 is suitably journaled in the housing and is provided on the end with a driving pulley 33 which is connected by one or more V-belts 34 as shown in Figure 2 to a power pulley It will be noted, however, that the opposed peripheries of the two wheels actually travel in opposite directions, the grinding wheel 12 rotating at a relatively high speed to effect stock removal while the regulating wheel rotates at a relatively slow speed to control the rate of rotation of a cylindrical work piece located in the grinding throat 16 between the wheels and indicated by the reference numeral It is especially suitable for grinding small parts which are susceptible of being ground by the infeed grinding method and the machine is provided with a single manual control which is movable in one direction to effect insertion of the work and completion of the grinding operation, and in the other direction to effect retraction of the grinding wheels and removal of the work from the grinding throat, whereby the machine may be readily operated by centelress unskilled operators.

In a centerless grinding machine having a grinding wheel and a regulating wheel, the combination of means for supporting one of said wheels for relative movement toward and from the other wheel, means for positioning work between the wheels, a rotatable shaft for actuating said work positioning means and said oscillatable support simultaneously and a micrometrically adjustable extensible link between said shaft and said oscillatable support for adjusting the range of movement of the grinding wheel for the same movement of the work positioning Smeans.

The periphery of cincijnati flange 24 is provided with micrometric graduations 27 and a pointer 28 fixed to the support cooperates with these graduations to indicate the amount of adjustment effeced by rotation of the adjusing screw. This invention relates to machine tools and more particularly to improvements in grinding machines.

The pulley 47, besides having a series of grooves 50′ for receiving the belts 49, also has another series of grooves 51 concinnati receiving the V-belts 52 by which the pulley is driven by the motor pulley 53 attached to the armature shaft 54 of a motor A pintle 41 centerlesa fixed in the bracket 40 and projects from opposite ends thereof to form trunnions 42 and 43 which are journaled in pillow blocks 44 and 45 which are mounted on the wall or partition The carrier 75 is connected to the shaft 65 by a yieldable connection comprising a spring pressed plunger 84 which is slidably mounted in a bore 85 formed in the casing and a spring 86 which urges the flat end 87 of the plunger against a flat 88 formed on the side of the shaft Search Expert Search Quick Search.

The spring has sufficient tension to normally eliminate any lost motion between the carrier and shaft whereby cincinnatti rotation of the shaft through an arc necessary to move the carrier from a grinding position to its work loading position the two move as a unit. In a centerless grinding machine having a grinding wheel and a regulating wheel, a spindle for supporting the regulating wheel, an adjustable housing for said spindle, said housing being guided for rectilinear movement laterally of the spindle axis, a spindle for centerlexs the grinding wheel, a swinging support for said spindle, a work carrier having a work loading position and a work grinding position, an oscillatable shaft having an eccentric extensible link connection between said shaft and said swinging support, motion transmitting connections between said shaft and said work carrier and manually operable means for oscillating said shaft to effect simultaneous movement of the work carrier and the grinding wheel.

In a centerless grinding machine having a grinding wheel cininnati a regulating wheel supported in opposed relation to form a grinding throat therebetween, the combination of a work carrier movable laterally to the axis of the grinding throat for work inserting and removing purposes, said work carrier having a work rest blade mounted thereon for movement therewith, stop means for limiting movement of the carrier into the grinding throat to determine the position of the work rest blade with respect to cincinntai axis of the grinding throat, and means simultaneously movable with the carrier for adjusting one of said wheels relative to the other.

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Thus, during movement of the handle 90 in a counterclockwise direction the work carrier is moved from a loading position to a grinding position and the eccentric 64 simultaneously moves the grinding wheel toward the regulating wheel.

The grinding wheel is so positioned and supported by its bracket that a line passing through the centers of the grinding and the regulating wheel during the grinding operation is substantially parallel to the guideway for the regulating wheel so that any adjustment of the regulating wheel slide toward and from the grinding wheel will be more accurately indicated by the graduations on the adjusting screw for the regulating wheel housing.

The grinding wheel Thus, the position of the grinding wheel with respect to the regulating wheel is determined by the rotatable position of the eccentric 65 and the adjustment of the extensible link. In a centerless grinding machine having opposed grinding and regulating wheels, the combination of means for adjustably supporting one of said wheels for infeeding movement relative to manyal other wheel, a work carrier movable from a loading position to a grinding position between said wheels, a rotatable shaft for actuating said carrier and a link connection between said shaft and said adjustable wheel for effecting simultaneous movement of the grinding wheel and the carrier.

This machine, being of the centerless type, is provided with a pair of opposed abrasive wheels and as more particularly shown in Figure 2.

Centerless grinder – CINCINNATI GRINDERS INC

This invention aims to provide a small compact and simplified centerless grinding machine of such a nature that it may be mounted on a bench or table, or as shown in Figure 1 of the drawings upon a pedestal specially provided for the purpose. At the moment that the work carrier hits the stop screw 89 the movement of the work carrier ceases, but the movement of the grinding wheel toward the work continues until the grinding wheel has reduced the work to size.

What is claimed is: In a centerless grinding machine having a grinding wheel and a regulating wheel, the combination of a swinging bracket for supporting the grinding wheel for movement toward and from the regulating wheel, a swinging bracket having work supporting means in the end thereof for moving work to and from a grinding position, motion transmitting connections between said brackets for effecting simultaneous movement thereof, resiliently operable means effective on one of said brackets for normally holding the grinding wheel in an inoperative position and said work supporting means in a loading position.

Figure 3 is a section through the machine as viewed on the line of Figure 2.

Cincinnati Centerless Grinder Manuals

The end of the screw is provided with a square head 26 to which a suitable socket wrench may be applied for rotating the screw. Figure 1 is a front elevation of a machine embodying the principles of this invention. The link 58 has an internally threaded rotatable sleeve 60 mounted therein which makes a threaded connection with a connecting rod 61, the connecting rod having a coupling G2 fixed to the end thereof in which is formed a bore 63 as shown in Figure 3 by which it is journaled on an eccentric portion 64 of an operating shaft There has thus been provided an improved compact centerless grinder of the bench type which is simple in construction and operation, making it suitable for inexperienced operators, and which has improved means for inserting and removing work, and a single control for the work handling means and the wheel feeding means.

As shown in Figure 2, the motor 54 may be mounted beneath the machine and supported on the underside of the machine base and a suitable cavity cut in the top of the pedestal II so that the motor may be attached and made part of the machine. It will be noted from Figure 2 that the coupling 62 extends laterally with respect to the axis of the connecting rod 61 and any movement of the eccentric 64 about the axis of the shaft 65 will cause the extensible link 58 to pivot about the trunnions The wheel 12 constitutes a grinding wheel which rotates clockwise as indicated by the arrow 13 and the wheel 14 constitutes a regulating wheel which also rotates clockwise -as indicated by the arrow In a centerless grinding machine having a grinding wheel and a regulating wheel supported for rotation in opposition to one another to form a grinding throat therebetween, one of said wheels being supported for relative movement toward and from the other wheel, the combination of means for inserting and withdrawing work laterally of the grinding throat and a manually operable lever for effecting insertion of the work and relative approach between the wheels sequentially.

It should now be apparent that the work carrier is normally held in an outward position or at its work loading station with the grinding wheel elevated and that the normal grinding cycle is effected by moving the lever in a counterclockwise direction to move the work and work rest blade into the grinding throat and then effecting a downward movement of the grinding wheel to effect the grinding operation.