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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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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.

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This pulley is on the output shaft 36 of a reduction speed unit, indicated generally by the reference numeral 37 and driven by a prime mover such as the motor After the carrier engages the stop, the shaft 65 may be rotated through an maunal angle to effect feeding of the grinding wheel. This is accomplished by forcibly causing retraction of the plunger 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 centterless by what is known in the art as the infeed grinding method.

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

In a centerless grinding machine having a grinding wheel and 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 ceterless blade mounted thereon for movement therewith, stop means for limiting movement of the carrier into the grinding throat to determine centerlesss position of the work rest blade with respect to the axis of the grinding throat, and cicinnati simultaneously movable with the carrier for adjusting one of said wheels relative to the other.

The plunger 70 is provided with a bore 12 in which the spring 73 is mounted and an adjusting screw 74 is provided for varying the tension of the spring, the screw being threaded in a fixed part of the machine. 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. 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.

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 opposed grinding and regulating wheels, the combination of means for adjustably supporting one of said wheels for infeeding movement relative to the 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.

Centerless grinder – CINCINNATI GRINDERS INC

In a centerless grinding machine having a grinding wheel and a regulating wheel supported for rotation and in opposition to one another to fcrm a grinding throat therebetween, the combination of means for inserting and withdrawing work with respect to the grinding throat including a work rest blade, and a backstop plate for supporting the work during movement into the grinding throat until picked up by the regulating wheel, said work rest blade being positioned to effect removal of the work during withdrawal of the carrier.

A backstop blade 83 is also supported by the side walls to support the work during loading operations and insure that the work is pushed into the grinding throat upon rotation of the work carrier to a grinding position.

One of the objects of this invention is to provide an improved simplified bench type centerless grinding machine.

The pulley 47 serves to drive the grinding wheel spindle through V-belts 49, and pulley 50 attached to the end of the spindle The lateral wall portions 76 and 77, as shown in Figure 3, carry work receiving guides or supports 78 which are adapted to receive and position spoollike work pieces 79 so that the work may be placed thereon when the carrier is swung outward by the operator upon clockwise rotation of the shaft This is accomplished by providing a depending lug 69 from the shaft 41 for engagement by a spring pressed plunger 70 mounted in a bore 71 provided in the wall 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.

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Referring to the drawings in which like reference numerals indicate like or similar parts: United States Patent 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 supporting 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.

Reverse movement of the lever of course effects retraction of the parts. This invention relates to machine tools and more particularly to improvements in grinding machines. 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.

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. A stop screw 89 threaded in a fixed part of the machine serves as a stop to limit the counterclockwise movement of the carrier and determine its grinding position. 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.

Cincinnati No. 2 Centerless Grinder Operation Manual

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 relatively unskilled operators. This adjustment is effected by an adjusting screw 22 which is cdnterless in cinciinnati 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 In a centerless grinding machine, the combination with a grinding wheel and a regulating wheel supported for rotation in opposition to one another to cincinnti a grinding throat, and means for supporting one of said wheels for movement toward and from the other, the combination of means for inserting and positioning a work piece in said throat, a control lever operatively connected for actuating said work inserting means and said wheel moving means and a yieldable connection for permitting subsequent movement of the wheel moving means after the work has been positioned.

In a centerless grinding machine having a grinding wheel and a regulating wheel supported for rotation on parallel axes to form a grinding throat therebetween, the combination of a work carrier supported for oscillation about an axis parallel to the axes of said wheels, a work rest blade mounted on the carrier for movement into the grinaing throat, additional means on the carrier for supporting a work grjnder adjacent said blade whereby upon movement of the work into the grinding throat the blade will absorb the grinding thrust, and stop means for limiting the movement of the carrier.

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 centerlrss 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.

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Other objects and advantages of the present invention should be readily apparent by reference to the following specification, considered in conjunction with the accompanying drawings forming a part thereof and it is to be understood that any modifications may be made in the exact structural details there shown and described, within the scope of the appended claims, without departing from or exceeding the spirit of the invention.

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.

In a centerless grinding centterless 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 crnterless work between the wheels, a rotatable shaft for actuating said crnterless positioning means and said oscillatable support manusl 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.

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 centdrless 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.

Cincinnati Centerless Grinder Manuals

The pintle 41 has an extension 46 upon which is mounted an eccentrically adjustable pulley 47, and in order to adequately support the pulley an additional pillow block 48 is provided for supporting the free end of the extension Since the amount of movement of the regulating wheel is rather limited it does not materially effect the belt drive so as to necessitate idler pulleys but if it was necessary to make allowances for this the unit 37 could be adjustably mounted on the floor of the machine housing upon which it is mounted.

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. 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.

The walls 16 and 77 also support a work 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. 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 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 The work is moved into and out of the grinding throat by an oscillatable work carrier 15 which is supported on the shaft 65 and is in the form of a housing which surrounds the regulating wheel for protection of the operator.