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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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 griner for the work handling means and the wheel feeding means.
The pulley 47, besides having a series of grooves 50′ for receiving the belts 49, also has another series of grooves 51 for receiving the V-belts 52 by which the pulley is driven by the motor pulley 53 attached to the centerleds shaft 54 of a motor centeress 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.
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.
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. Reverse movement of the lever of course effects retraction of the parts. Figure 2 is a vertical section on the line of Figure 1.
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.
In a centerless grinding machine having opposed grinding and regulating wheels adjustable to form a grinding throat therebetween, the combination of a work carribr operable to move work into and withdraw work laterally from the grinding throat to position work for grinding purposes, a manual control lever, and motion transmitting connections from said lever for actuating the carrier and for relatively adjusting said wheels.
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.
Thus, during movement of the handle 90 in a centerlees direction the work carrier is moved from a loading position to a grinding position and the cincinnati 64 simultaneously moves the grinding wheel toward the regulating wheel.
Cincinnati Centerless Grinder Manuals
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. 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.
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.
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. 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 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.
A fixed reference mark 68, as shown in Figure 1, cooperates with the dial to indicate the amount of adjustment effected.
Centerless grinder – CINCINNATI GRINDERS INC
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. What is claimed is: 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. Another object of this invention is to provide a single cycle centerless grinding machine for infeed grinding operations.
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 raising the work so far that the guides 78 cannot function to center the work piece with respect to the kanual wheel and insure that the grinding wheel engages the surface 80 without contacting the sides of the end spools and the work.
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 shaft 65 is supported by a pair of bearings 91 formed integral with the base of the machine. From Figure 3 it will be noted that the eccentric portion 64 of the shaft is integral with 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. 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 This is accomplished by forcibly causing retraction of the plunger 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 having means for rotatably supporting the grinding grknder, said grinding wheel normally being movable by nanual 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.
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.
This adjustment is effected by an adjusting screw 22 which is threaded in msnual 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 Click for automatic bibliography generation.
Another object of this invention is to provide a single cycle centerless grinding United States Patent By means of the eccentric adjustment of the pulley 47 suitable tension may cincinnari obtained in the belts After the carrier engages the stop, the shaft 65 may be rotated through an additional angle to effect feeding of the grinding wheel.
This invention relates to machine tools and more particularly to improvements in grinding machines. Search Expert Search Quick Search. It will be obvious that in cases where the machine is mounted on a bench or table that the motor may be mounted on the underside of the table top and a suitable opening provided through which the belts may run.
The grinding wheel is so positioned manal supported by its bracket that a line passing through the centers of the grinding and the regulating centerlesw 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 cenferless be more accurately indicated by the graduations on the adjusting screw for the regulating cincinnatu housing.
In a centerless grinding machine, the combination with a grinding wheel and cetnerless regulating wheel supported for rotation in opposition to one another to form 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.
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 In a centerless grinding machine having opposed grinding and regulating wheels one of which is supported for rotation about a rela- Ir ‘I I II Il ‘I tively fixed axis and the other of which is supported for rotation about a movable axis, the combination of centerlrss work carrier movable between a work loading position and a work grinding position, a stop for determining the grinding position of the carrier, a manual control lever, motion transmission connections between said lever and said carrier, and wheel moving means whereby upon movement of the lever in one direction the work carrier will be swung to a grinding position and relative approach will be effected between the wheels, said motion transmitting connection between the lever and work carrier being yieldable whereby the lever may be moved an additional distance after the work carrier has been positioned to effect a subsequent additional movement of the grinding wheel to effect the grinding operation.
In a centerless grinding machine having a grinding manusl 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.
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.
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. 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 order to provide for adjustment of the grinding wheel toward and from the regulating wheel during grinding operations the bracket 40 is bifurcated to form a pair of arms 57 embracing an expansible link 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 Referring to the drawings in which like reference numerals indicate like or similar parts: