GB626643A - Grinding wheel feeding mechanism - Google Patents

Grinding wheel feeding mechanism

Info

Publication number
GB626643A
GB626643A GB1630746A GB1630746A GB626643A GB 626643 A GB626643 A GB 626643A GB 1630746 A GB1630746 A GB 1630746A GB 1630746 A GB1630746 A GB 1630746A GB 626643 A GB626643 A GB 626643A
Authority
GB
United Kingdom
Prior art keywords
valve
feed
relay
solenoid
grinding wheel
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
Application number
GB1630746A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Abrasives Inc
Original Assignee
Norton Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to US626643XA priority Critical
Application filed by Norton Co filed Critical Norton Co
Publication of GB626643A publication Critical patent/GB626643A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00Drives or gearings; Equipment therefor
    • B24B47/20Drives or gearings; Equipment therefor relating to feed movement

Abstract

626,643. Hydraulically-operated grinding-machines. NORTON CO. May 29, 1946, No, 16307. Convention date, July 28, 1945. [Class 60] [Also in Group XXIX] A grinding-machine having a rotatable grinding wheel and a transversely movable slide therefor comprises means including a piston and cylinder rapidly to move said slide, means including a dash pot feed regulator to slow down the rapid approaching to a relatively slow continuous feeding movement, electrical control means rendered operative after a predetermined slow feed to produce a fine intermittent feed, means to stop the forward feed, and a time delay relay operatively connected to return said slide and grinding wheel to an inoperative position after a predetermined period of dwell. There may be a fine continuous plunge-cut feed before the forward feed is stopped. The grinding wheel slide 22 is moved by a piston 36 working in a cylinder 35 under the control of a valve 43. The sequence of operations is as follows:- 1. Rapid approach of grinding wheel to work. The operator rocks control lever 155 to close push button start switch 157, so energizing relay 160 which energizes solenoid 50 to move valve 43 to the left. The piston 36 moves to the left at a rate determined by the setting of a throttle valve 78 in the exhaust line. 2. Relatively slow continuous feed (shoulder feed). Before the grinding wheel contacts the work, a collar 61 on the rod of the piston 36 engages a sleeve 58 in contact with dashpot pistons 56, 57; the rate of movement is now determined by the setting of a needle valve 64 in the outlet from the dash pot cylinders. 3. Fine intermittent feed (rounding up). When screw 51 carried by the sleeve 58 engages and closes limit switch 52, relays 161, 162 are energized. Relay 161 energizes solenoid 68 to close valve 67, thus stopping further exhaust from the dashpot cylinders through the needle valve 64. Relay 162 energizes solenoid 93 to close valve 92 and also energizes solenoid 131 to open valve 130, thus admitting pressure liquid to a hydraulic reciprocating motor 119 constructed as in Specification 535,227, [Group XXIX] ; the continuous reciprocation of the rod 122 of the motor causes, by tappets 104, 105, intermittent shifting of a valve 101 containing a shuttle valve 102, whereby intermittent exhaust of predetermined amounts of fluid from a cylinder chamber 90 of a cylinder 83 is obtained; the cylinder 83 contains a piston 82 having a rod 81 which is thus withdrawn in steps from a cylinder 80 which receives fluid from the dashpot cylinders. 4. Fine continuous feed (body feed). A gauge head 145 is placed in operative position in engagement with the work piece. When screw 53 carried by the sleeve 58 engages and opens limit switch 54, the relay 162 is de-energized; the solenoid 131 is thus de-energized allowing the valve 130 to close under spring action, to stop the intermittent infeed of the grinding wheel. The solenoid 93 is also de-energized allowing valve 92 to open under spring action; exhaust from the cylinder chamber 90 now passes continuously through the valve 92 and throttle valve 94, the setting of which determines the rate of movement. 5. Dwell (sparking-out or finish). When the work is reduced to predetermined size contacts in the gauge 145 close to energize relay 149; this energizes the solenoid 93 to close the valve 92 and stop the feed, and also initiates action of time delay relay 150. 6. Rapid withdrawal. After predetermined time interval has elapsed, time relay 150 de-energizes relay 160 which deenergizes solenoid 50 whereby valve 43 is moved to the right by a spring; the piston 36 is thus moved rapidly to the right. The dash pot system can be replenished by opening a valve 140.
GB1630746A 1945-07-28 1946-05-29 Grinding wheel feeding mechanism Expired GB626643A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US626643XA true 1945-07-28 1945-07-28

Publications (1)

Publication Number Publication Date
GB626643A true GB626643A (en) 1949-07-19

Family

ID=22044018

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1630746A Expired GB626643A (en) 1945-07-28 1946-05-29 Grinding wheel feeding mechanism

Country Status (1)

Country Link
GB (1) GB626643A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2864211A (en) * 1948-08-26 1958-12-16 Landis Tool Co Method of plunge grinding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2864211A (en) * 1948-08-26 1958-12-16 Landis Tool Co Method of plunge grinding

Similar Documents

Publication Publication Date Title
US1998873A (en) Fluid pressure feeding mechanism for metal working tools
US2267177A (en) Power transmission
US1840231A (en) Grinding machine
US2021066A (en) Machine tool
GB1452200A (en) Multi-dose injector
GB710335A (en) Improvements relating to pneumatic feeding devices for machine tools
GB1522469A (en) Steam iron
GB1004503A (en) Knife holder for circular-knife cutting machines
GB299764A (en) Improvements relating to fluid-operated metal-cutting and like machine tools
US2292588A (en) Automatic indexing control
GB1535876A (en) Hydraulic presses for shearing or punching operations
GB684412A (en) Improvements in or relating to shapers
GB1011758A (en) Improvements in or relating to machine tools
GB1057773A (en) Improvements in and relating to grinding machines
GB723871A (en) Fluid pressure power mechanisms
US1997551A (en) Grinding machine
US2766825A (en) Hydraulic work clamp for squaring shears
GB1111298A (en) Screw injector for plastic material
GB626854A (en) Improvements in gear grinding machines
GB995222A (en) Impulse valve for the control of a pressure fluid
GB1006066A (en) An attachment for use with machine tools such as automatic lathes
US2578454A (en) Drilling and swarf clearing device for machine tools
SE7901054L (en) measuring device
US3535828A (en) Grinding machine
GB552671A (en) Improvements in lathes