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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At the moment that the work carrier hits the stop screw 89 the movement of the work carrier ceases, but grindder movement of the grinding wheel toward the work continues until the grinding wheel has reduced the work to size. A fixed reference mark 68, as shown in Figure 1, cooperates with the dial to indicate the amount of adjustment effected. 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 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.
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. 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.
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.
Cincinnati Centerless Grinder Manuals
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 manjal 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.
The annular surface 80 between the end flanges of the work is the surface to be ground ckncinnati the grinding wheel 12 is made of sufficient width to engage the entire surface so that the grinding mznual may be performed by what is known in the art as the infeed grinding method.
The spring has sufficient tension to normally eliminate any lost motion between the carrier and shaft whereby during 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.
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. 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.
Figure 2 is a vertical section on the line of Figure 1.
Cincinnati No. 2 Centerless Grinder Operation Manual
Figure 3 is a section through the machine as viewed on the line of Figure 2. This invention relates to machine tools and more particularly to improvements in grinding machines.
This machine, being of the centerless type, is provided with a pair of opposed abrasive wheels and as more particularly shown in Figure 2. The plunger 70 is provided with a bore 12 in which the spring 73 is mounted and an adjusting screw grindwr is provided for varying the tension of the spring, the screw being threaded in a fixed part of the machine.
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 After the carrier engages the stop, the shaft 65 may be rotated through an additional angle to effect feeding of the grinding wheel.
The pintle 41 has an extension 46 cincinntai 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 whole weight of the grinding wheel and part 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 wheel 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.
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 manal modifications may be made grinddr 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 manuual slide toward and from the grinding wheel will be more accurately indicated by the graduations on the adjusting screw for the regulating wheel housing.
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. 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 cincinbati of said wheels.
The grinding wheel The periphery of the 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 mamual adjusing screw.
In a centerless grinding machine having a grinding wheel and a regulating wheel adjustably mounted in opposed relation to form a grinding throat therebetween, cincinnzti combination of oscillatable means for inserting and withdrawing work laterally of centerlesw grinding throat, said means including a work rest blade for absorbing grinding thrust on the work, and a control lever operatively connected cenetrless actuation of said means and adjustment of one of said wheels.
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.
A pintle 41 is 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 regulating wheel 14 is made of sufficient width to also engage this surface with enough frictional pressure to rotate the work at a predetermined rate during the grinding operation.
Centerless grinder – CINCINNATI GRINDERS INC
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 cincinnayi by the reference numeral The pulley 47 serves to drive the grinding wheel spindle through V-belts 49, and pulley 50 attached to the end manuao the spindle Thus, the plunger exerts a counterclockwise force on the shaft 41, producing a definite upward bias grindre the grinding 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 gribder effective on said support for holding the grinding wheel normally in a non-grinding position.
Referring to the drawings in which like reference numerals cincinnaati like or similar parts: 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 concinnati In a centerless grinding machine having a grinding wheel and a regulating wheel, the combination of means for supporting the regulating wheel for rotation about a normally fixed axis, an oscillatable support centerlees means for rotatably supporting the grinding wheel, said grinding wheel normally being movable by gravity toward 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 to 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 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 geinder connection between said shaft grijder said adjustable wheel for effecting simultaneous movement of the grinding wheel and the carrier.
The shaft 65 is supported by a pair of bearings 91 formed integral with the base of the machine.