US2889665A - Compensating device for grinding machines - Google Patents
Compensating device for grinding machines Download PDFInfo
- Publication number
- US2889665A US2889665A US688521A US68852157A US2889665A US 2889665 A US2889665 A US 2889665A US 688521 A US688521 A US 688521A US 68852157 A US68852157 A US 68852157A US 2889665 A US2889665 A US 2889665A
- Authority
- US
- United States
- Prior art keywords
- line
- grinding
- wheelhead
- wheel
- work
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/18—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the presence of dressing tools
- B24B49/183—Wear compensation without the presence of dressing tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/02—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables
- B24B47/06—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables by liquid or gas pressure only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/20—Drives or gearings; Equipment therefor relating to feed movement
- B24B47/206—Drives or gearings; Equipment therefor relating to feed movement for centreless grinding machines; for machines comprising work supports, e.g. steady rests
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/02—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
- B24B49/04—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent involving measurement of the workpiece at the place of grinding during grinding operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/12—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving optical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/18—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the presence of dressing tools
Definitions
- This invention relates to grinding machines and, more particularly, to a device for automatically adjusting the position of the wheel head of a grinding machine to compensate for wear of the wheel.
- the conventional grinding cycle of either centerless or center type grinding machines generally consists of a rapid traverse movement of the wheel head toward the work to bring the wheel into grinding position followed by a fast infeed movement of the wheel for coarse grinding of the work to approximately the finish diameter.
- the infeed is reduced to a slow feed rate for finish grinding the work to final size after which the wheel head is retracted from the work.
- the point at which coarse grinding ends and finish grinding begins is normally determined by a gauge which signals the approach of the work to final size. When the work has reached its final diameter, the gauge provides another signal which stops the slow feed and initiates retraction of the wheel head from the work so as to permit loading of the next'piece to be ground.
- This grinding cycle is repeated for each successive piece of work with intermittent truing of the grinding wheel to maintain a sharp and accurate cutting surface thereon.
- the diameter of the grinding wheel becomes progressively smaller due to attrition of the wheel caused by the grinding and truing operations.
- the fast feed rate portion 'of the infeed cycle will continually increase due to cutting of air as the face of the grinding wheel recedes further and further from the work. This is undesirable since it lengthens the time of the grinding cycle and reduces the production rate of the machine.
- Means have heretofore been provided for automatically compensating for wheel wear, one such means being shown and described in the Decker and Kearns Patent No. 2,641,876, patented June 16, 1953.
- the mechanism shown in this patent includes mechanical, electrical, and hydraulic components which function to maintain the distance moved by the wheel during infeeding movement substantially constant despite the wear of the wheel.
- Another object of the invention is to provide a wear compensation device for a grinding machine which utilizes a one-way driving connection to measure the amount of wear of the wheel and to advance the wheel toward the work by a corresponding amount.
- FIG. 1 is a front view of a machine embodying the principles of the present invention.
- Fig. 2 is a front elevation of a portion of the machine shown in Fig. 1 with parts broken away to show the rela tion of the novel structure with the prior art grinding machine.
- Fig. 3 is a horizontal cross sectional view taken through the structure shown in Fig. 2.
- Fig. 4 is an end view taken along the line 44 in Fig. 3.
- Fig. 5 is a hydraulic diagram which illustrates the operation of the infeed mechanism of the present machine.
- Fig. 6 is a wiring diagram which shows the electrical circuits employed for controlling the infeed mechanism.
- Fig. 7 is aschematic view illustrating one form of gauge which is adaptable for use with the present machine.
- the grinder is provided with a base 10 on which is supported a grinding wheel 11 for rotation about an axis which is fixed with respect to the base 10.
- the work piece 12 to be ground is supported on a work rest blade 13 and is pressed against the wheel 11 by a second grinding wheel 14 which rotates at a reduced speed and serves to regulate or control the rotation of the work piece 12 as it is being ground by.
- the wheel 14 is carried by a wheelhead 15 which is guided by ways 16 carried by a lower slide 17.
- the lower slide is suitably guided for sliding movementi 'on the base 10 and carries at its forward end the work rest blade 13 as illustrated in Fig. 1.
- a clamp 18 is provided for securing the wheelhead 15 to the lower slide 17 so that the two will move as a unit on the base 10.
- a second clamp 19 is provided for securing the lower slide to the base whereupon the wheelhead may be traversed along the lower slide by releasing the clamp 18.
- the wheelhead is provided with a hand wheel 20 which is adapted to rotate a nut journaled in the wheelhead and meshing with a feed screw.
- This mechanism is fully explained and described in the Ball and Grove Patent No. 2,709,877, issued June 7, 1955.
- the wheel head 15 is clamped to the lower slide 17 by tightening a clamping lever'18,
- clamp 19 is loosened to permit the lower slide to move with respect to the base 10.
- the handwheel 20 is then turned to feed the wheelhead 15 and lower slide 17 as a unit along the bed until the work rest blade is brought into proper position.
- the clamp 19 is then tightened, and the clamp sired setting of the wheel 14 independently of the work rest blade 13.
- the clamp 21 (Fig. 1) is then tightened to clamp the nut with respect to the wheelhead 15 as explained in the Ball et feeding movement of the rotation of the feed screw.
- the present machine is desirably provided with the wheelhead to be effected by these parts being similar to those bearing similar numbers in the last-mentioned patent.
- the sleeve 34 is pinned to the feed screw 23, whereas in the present machine the sleeve is journaled for rotation on the feed screw by means of and a combined radial and thrust,
- thefe'ed screw 23 is journaled for rotation with respect 'to the walking beamf29, it is desirable for set-up'purposes to provide a clamp screw 39 '(Fig. 2) for preventing such relative rotation ofthe parts.
- the clamp screw 39 is received ina tapped hole provided in the pivot pin 30 with the inner end of the screw adapted to bear against the feedscrew 23 and thereby secure the latter-against rotation when the clamp screw 39 is tightened. This will prevent rotation of the feed screw when the hand wheel 20 is turned to rotate the nut during the set-up of the machine.
- a frame 45 Secured to the right hand end of the base is a frame 45 which provides support for the walking beam 29 and other parts of the infeed mechanism for the grinding wheel 14.
- This frame is provided with an end cover or housing '46 which serves to enclose the compensating mechanism which forms the subject matter of the present invention.
- the feed screw 23 is provided at its right hand end with an extension 47 on which is mounted the automatic wear compensating mechanism 48 which is more completely shown in Figs. 3 and 4.
- Fig. 3 also shows the principal elements of the walking beam type infeed mechanism which is fully disclosed in the Stuckey et al. patent but which will be briefly described herein in order to provide a more complete understanding of the present invention.
- the walking beam 29 is provided at each end with bi-.
- the stud 52 is carried by a piston rod 53 which extends into a cylinder 54 formed in the frame 45.
- a piston 55 Secured to the piston rod is a piston 55 which works in the cylinder 54 and which is adapted to be moved to the position shown in Fig. 3 when hydraulic fluid under pressure is admitted to the cylinder through a port 56. Fluid is perrnittedto escape from the right hand end of the cylinder through a port 57.
- the piston 55 provides rapid traverse movement of the wheelhead toward the work by effecting axial movement of the feed screw 23 towardthe left as viewed in Fig. 3.
- a bracket 59 operates a lever 60 of a limit switch 2LS to initiate coarse grinding ofthe work. While, in the present disclosure the bracket 59 is shown secured to the piston rod 53, it will be appreciated that it might equally well be attached to the walking beam 29 orformed as an integral portion thereof.
- limit switch 2L8 is held in a fixed positon on the frame 45 by asuitable supporting bracket.
- the feed shaft 65 passes through a bearing cap68 and has journaled thereon a sleeve which carries the pivot stud 51.
- the feed shaft 65 is provided with a key 69 which slides in a keyway formed in a pinion gear 70 which is journaled for rotation in the frame 45 by antifriction bearings 71.
- Fluid pressure for operating the system is provided by a hydraulic pump 75 which is driven by a suitable motor and delivers hydraulic fluid under pressure from a reservoir 76 to a pressure line 77.
- the pressure in the line 77 is maintained at a desired value by a relief valve 78 which returns excess fluid into the reservoir 76.
- a return line 79 empties into the reservoir 76 in a con ventional manner. Rapid traverse of the wheelhead is effected by energizing a solenoid 1SOL whereby a spool 84 of a solenoid valve 85 is moved toward the right against the force of a spring 86.
- valve 88 With hydraulic fluid connected by valve 88 withthe reservoir line 79 so as to permit fluid in the left hand end of the cylinder 54 to escape threefrom.
- the piston 55 will be moved rapidly to the left as viewed in Fig. 5, thereby moving the feed screw 23 to the left as viewed in Fig. 3.
- the limit switch ZLS is operated, thereby energizing a solenoid 2SOL (Fig. 5).
- This causes a spool 95 of a solenoid valve 96 to be moved toward the right against the urgency of a spring 97.
- fluid under pressure from line 77 is delivered through a line 98 to the right hand end of a control valve 99.
- This valve contains a spool 100, which is thereby moved toward the left against the urgency of a spring 101 so as to connect the pressure line 77 with a line 102 connected to the left hand end of a cylinder 103 containing a rack piston 104.
- the rack teeth on the piston mesh with the teeth of the gear 70 (see also Fig. 3).
- a gauge hereinafter to be described provides a signal which deenergizes 3SOL, thereby blocking the flow of fluid from line 105 through the fast feed rate throttle Coarse and fine grinding movement of the wheelhead" is provided by a feed shaft 65 which has'secured thereto valve 110.
- the fluid flowing through line 105 is thereby constrained to pass through a slow feed rate throttle valve 113 to line 112 and thence through valve 99 to the reservoir line 79.
- the speed at which the piston 104 moves ,toward the right as viewed in Fig. 5 is thereby reduced so asto reduce the feed rate of the wheelhead produced by the screw 66 (Fig. 3) and the feed shaft 65.
- the gauge When the work reaches final size, the gauge provides a second signal which causes solenoids 1SOL and 2SOL to be deenergized.
- 1SOL When 1SOL is deenergized the solenoid valve 85 and control valve 88 return to the positions shown in Fig. in which the motor line 92 is connected with the pressure line 77, and the motor line 91 is connected with the reservoir line 79. The piston 55 is thereby moved to its right hand position as determined by the setting of the adjusting screw 58.
- solenoid 2SOL When solenoid 2SOL is deenergized, the solenoid valve 96 and control valve 99 return to the positions shown in Fig. 5 wherein the motor line 102 is connected with the reservoir line 79 while the motor line 112 is connected with the pressure line 77.
- the gauge which provides the signals for controlling the infeed mechanism as the work is ground to size may be of the type shown in Fig. 7 in which a feeler 120 turning on a shaft 121 is providedat its distal end with a finished surface 122 against which air from a nozzle 123 im pinges.
- a feeler 120 turning on a shaft 121 is providedat its distal end with a finished surface 122 against which air from a nozzle 123 im pinges.
- the flow of air through orifice 123 is restricted by the approach of the surface 122, and signals are provided which control the operation of the infeed mechanism. Provision may be made for moving the feeler 120 away from the work at the conclusion of the grinding cycle so that a new piece of work may be placed in position for grinding.
- the feeler carries a gear 124 which meshes with a rack 125 which is normally held elevated in the position shown in Fig. 7 by a tension spring 126 stretched between a spring stud 127 on the rack and the shaft 121.
- the feeler may be swung away fromthe work and from the nozzle 123 for the loading operation, after which it may be returned to the position shown in Fig. 7 by release of the rack 125.
- the gauge includes a pressure regulating valve 131 connected by a line 130 with a source of air under pressure.
- the valve 131 delivers air at constant pressure to a variable restriction or throttle valve 132.
- the delivery side of the valve 132 is connected by a line 133 and a flexible hose 134 with the orifice 123.
- Pressure in the line 133 is communicated to pneumatic relays 135 and 136 by lines 137 and 138.
- the relays are also provided with a source of reference pressure delivered thereto through a line 140 which is connected with the delivery side of a pressure regulating valve 139 which has its input connected to the supply pressure line 130.
- Pneumatic relays 135 and 136 are connected by air lines 141 and 142 with electric pressure switches 143 and 144 which signal the approach of the work to final size and also its arrival at the finish diameter.
- the electrical circuit includes a pair of conductors 150 and 151 which are connected by terminals 152 with a source of energizing current.
- a grinding cycle is initiated by depression of a start push button 153 (line 2) which energizes a control relay 3CR through a normally closed stop push button 154 and the normally closed contacts of a relay CR.
- the relay 3CR When the relay 3CR is energized, the normally open contacts of this relay in line 3 are closed, thereby establishing a holding circuit around the start push button 153 which maintains' the relay energized.
- the solenoid valve 106 is operated, thereby connecting the rapid feed rate throttle valve with the line 105 so as to cause the wheelhead to be advanced toward the work at a fast feed rate.
- a signal light 159 (line 6) will be illuminated so as to indicate that the machine is in the coarse grinding phase of its cycle.
- a signal lamp 160 (line 8) will be illuminated to indicate a slow feed rate while the lamp 159 will be extinguished;
- the pressure in line 133 will be such as to operate pneumatic relay 136 and the electric pressure switch 144. This will cause the normally closed contacts 157 (line 9) of the switch to open and the normally open contacts 158 (line 10) of the switch to close.
- the contacts 157 have no connection in the electrical circuit while the contacts 158, when closed, energize a control relay 10CR, thereby opening the contacts of this relay in line 2.
- the relay 3CR is thereby deenergized so as to open its contacts in line 4 and deenergize solenoid 1SOL.
- the solenoid valve 35 (Fig. 5) thereby returns to the position shown in Fig. 5- which causes the piston 55 to move to the right in cylinder 54 and retract the wheelhead from the work.
- the opening of contacts 3CR in line 4 also deenergizes solenoid 2SOL thereby returning the rack piston 104 to the position shown in Fig. 5.
- the lamp 160 will also be extinguished while a lamp 161 (line 11, Fig. 6) will be illuminated by the closure of contacts 10CR in line 11, thereby signaling that the work piece has been reduced to its finish diameter.
- the Work 12 is now ready to be ejected from the machine and a new piece of work loaded therein in preparation for the next grinding operation. At this time the feeler is swung out of position by the rack (Fig.
- the feed shaft 65 (Fig. 3)'has secured to its right hand end a spur gear 165 which meshes with a corresponding gear 166 journaled for free rotation on the right hand end of extension 47 of feed screw 23 by ball bearings 167.
- a portion of the teeth of gear 166 are removed to provide a seat for a block 168 which is secured to the gear 166 and provided with a projecting tooth or driver 169 as shown in Fig. 3.
- This tooth is adapted to cooperate with a pair of abutment blocks 170 and 171 which are clamped by nuts 172 on tee bolts 173 7 to the periphery of an annular control member 174.
- a portion of the periphery of member 17 4- is provided with serrations 175 as shown in Fig. 4, which cooperate with corresponding serrations provided on the underside of blocks 170 and 171 to prevent slipping of the abutment blocks on the member 174.
- the member 174 is fastened by a key 178 (Fig. 3) to a cam clutch 179 having sprags 180 which provide a oneway driving connection between the shaft extension 47 and the'member 174.
- the member 174 and the cam clutch 179 are retained on the end of shaft 147 by a nut 181 screwed on the end of shaft47 and a washer 182
- the tooth 169 is adapted to engage with the block 170 as shown in Fig. 4.
- the member 174 When this occurs, the member 174 will be moved clockwise as viewed in Fig. 4' a slight amount, thereby causing slippage of the cam clutch on the shaft extension 47.
- the tooth 169 When the wheelhead 1s retracted at the end of the infeed cycle, the tooth 169 will return to the position shown in Fig. 4, However, since the member 174 has beendisplaced slightly in a clockwisedire'ction, the tooth 169 will contact the block 170 andreturn the member 174 to the position shown in Fig. 4. Since this is in the driving direction of the cam clutch 17 9, the shaft extension 47 and feed screw 23 will be turned slightly in a'counterclockwi'se direction, thereby infeeding the wheelhead slightly toward the work.
- control member 174 will beadvanced during the next grinding cycle by an amount equal to the amount of material removed from the wheel during the truing operation, and, atthe end of the infee'd cycle when the wheel head is retracted, the tooth 169 will engage the block 170 and turn the member 174 and the feed screw' 23 by alike amount so'as .to infeed the wheel head by an amount equal to the stock removed from the wheel during the truing operation.
- ing means when the workpiece reaches a predetermined siz e, and'rneans to-adjust the feeding means to maintain successive strokes of the wheelhead substantially constant despite any reduction in the diameter of'the grinding wheel
- saidmeans including a rcciprocable driveroperatively connected-with saidgfeeding means for-movement in synchronism with the advance and return strokes of the wheelhead, a driven member, a pair of spaced abutments on said driven member disposed on opposite sides of said driver, one of said abutments beingengageableby said driver nearthe end of its advance stroke when such strokeis' greater than the previous advance stroke thereof to move the driven member in one direction, and the other of said abutments being engageable by said driver upon its return stroke 'to return the driven member to its original starting; position, and a'one-way driving connection between said driven member and said feeding means to permit free rotation of said member with respect to said feedingrneans'in one direction
- said means including means toadju'st the starting position of said wheel'- head, a 'reciprocable driver 'operatively connected with said feeding means for movement in synchronism with the advance and return strokes of the wheelhead, a-driven member, a pair of spaced abutments on said driven member disposedon opposite sides of said driver, onejof said abutments'being engageable by said driver near the end or its advance stroke when'such stroke is greater than thepi-eviousadvance stroke thereof to move the driven member i'n'one direction,- and the other of said abutments being eh'gageable by said driver upon its return stroke to return the drivenmember'to'its original starting position, and a one-way driving connection between said driven member and said"
- said means'includinga'recipro cable driver operatively connected with said feedingmeans for movement in synchronism with the advance andret'urn strokes of the feed screw, a driven ber disposed on opposite sidesof said driver, one of said abutments being engageable by said driver near the end her to thereby rotate the screw and advance the starting of its advance stroke when such stroke is greater than position of the wheelhead toward the workpiece in accordthe previous advance stroke thereof to move the driven ance with the reduced diameter of the grinding wheel. member in one direction, and the other of said abutments being engageable by the driver upon its return stroke to 5 References Cited in the file of this patent return the driven member to its original starting position,
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL113550D NL113550C (xx) | 1957-10-07 | ||
US688521A US2889665A (en) | 1957-10-07 | 1957-10-07 | Compensating device for grinding machines |
GB31150/58A GB850049A (en) | 1957-10-07 | 1958-09-30 | Precision grinding machine |
FR1212313D FR1212313A (fr) | 1957-10-07 | 1958-10-06 | Perfectionnements apportés aux machines-outils dites rectifieuses |
DEC17643A DE1116570B (de) | 1957-10-07 | 1958-10-07 | Beistelleinrichtung fuer messgesteuerte sowie den Scheibenschwund selbsttaetig kompensierende Schleifmaschinen mit Eil-, Grob- und Feinzustellung |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US688521A US2889665A (en) | 1957-10-07 | 1957-10-07 | Compensating device for grinding machines |
Publications (1)
Publication Number | Publication Date |
---|---|
US2889665A true US2889665A (en) | 1959-06-09 |
Family
ID=29270981
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US688521A Expired - Lifetime US2889665A (en) | 1957-10-07 | 1957-10-07 | Compensating device for grinding machines |
Country Status (5)
Country | Link |
---|---|
US (1) | US2889665A (xx) |
DE (1) | DE1116570B (xx) |
FR (1) | FR1212313A (xx) |
GB (1) | GB850049A (xx) |
NL (1) | NL113550C (xx) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2949708A (en) * | 1959-06-24 | 1960-08-23 | Cincinnati Milling Machine Co | Gage head for in-process gaging in machine tool |
US2950581A (en) * | 1959-03-30 | 1960-08-30 | Cincinnati Milling Machine Co | Gaging device |
US3271908A (en) * | 1963-11-15 | 1966-09-13 | Landis Tool Co | Dresser control for abrasive wheels |
DE1254989B (de) * | 1961-03-31 | 1967-11-23 | Cincinnati Milling Machine Co | Vorrichtung zur Kompensation der Duchmesseraenderung von Schleifscheiben bei Spitzenlosschleifmaschinen |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1993830A (en) * | 1933-09-11 | 1935-03-12 | Cincinnati Grinders Inc | Grinding machine |
US2049611A (en) * | 1929-09-27 | 1936-08-04 | Cincinnati Grinders Inc | Automatic sizing mechanism |
US2518600A (en) * | 1947-02-08 | 1950-08-15 | Cincinnati Milling Machine Co | Infeed attachment for grinding machines |
US2718101A (en) * | 1954-10-18 | 1955-09-20 | Cincinnati Milling Machine Co | Automatic infeed mechanism for centerless grinders |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE545675C (de) * | 1930-03-07 | 1932-03-04 | Fritz Werner Akt Ges | Einrichtung an Schleifmaschinen mit selbsttaetiger Zustellung der Schleifscheibe |
DE643179C (de) * | 1936-03-07 | 1937-03-31 | Fritz Werner Akt Ges | Beistellvorrichtung fuer Schleifmaschinen |
-
0
- NL NL113550D patent/NL113550C/xx active
-
1957
- 1957-10-07 US US688521A patent/US2889665A/en not_active Expired - Lifetime
-
1958
- 1958-09-30 GB GB31150/58A patent/GB850049A/en not_active Expired
- 1958-10-06 FR FR1212313D patent/FR1212313A/fr not_active Expired
- 1958-10-07 DE DEC17643A patent/DE1116570B/de active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2049611A (en) * | 1929-09-27 | 1936-08-04 | Cincinnati Grinders Inc | Automatic sizing mechanism |
US1993830A (en) * | 1933-09-11 | 1935-03-12 | Cincinnati Grinders Inc | Grinding machine |
US2518600A (en) * | 1947-02-08 | 1950-08-15 | Cincinnati Milling Machine Co | Infeed attachment for grinding machines |
US2718101A (en) * | 1954-10-18 | 1955-09-20 | Cincinnati Milling Machine Co | Automatic infeed mechanism for centerless grinders |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2950581A (en) * | 1959-03-30 | 1960-08-30 | Cincinnati Milling Machine Co | Gaging device |
US2949708A (en) * | 1959-06-24 | 1960-08-23 | Cincinnati Milling Machine Co | Gage head for in-process gaging in machine tool |
DE1254989B (de) * | 1961-03-31 | 1967-11-23 | Cincinnati Milling Machine Co | Vorrichtung zur Kompensation der Duchmesseraenderung von Schleifscheiben bei Spitzenlosschleifmaschinen |
US3271908A (en) * | 1963-11-15 | 1966-09-13 | Landis Tool Co | Dresser control for abrasive wheels |
Also Published As
Publication number | Publication date |
---|---|
NL113550C (xx) | |
FR1212313A (fr) | 1960-03-23 |
GB850049A (en) | 1960-09-28 |
DE1116570B (de) | 1961-11-02 |
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