GB516887A - Improvements in or relating to grinding machines - Google Patents
Improvements in or relating to grinding machinesInfo
- Publication number
- GB516887A GB516887A GB20625/38A GB2062538A GB516887A GB 516887 A GB516887 A GB 516887A GB 20625/38 A GB20625/38 A GB 20625/38A GB 2062538 A GB2062538 A GB 2062538A GB 516887 A GB516887 A GB 516887A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- wheel
- plunger
- grinding
- cylinder
- 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
Links
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
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/35—Accessories
- B24B5/355—Feeding 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
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
516,887. Grinding-machines. CINCINNATI GRINDERS, Inc. July 12, 1938, No. 20625. Convention date, July 16, 1937. [Class 60] [Also in Group XXIX] In a centreless grinder of the infeed type, movements of the regulating wheel towards the grinding-wheel are produced by a fluid piston moving in a cylinder under the control of a valve with follow-up means connected to the piston, and movements of the wheel away from the grinding-wheel are produced by a separate piston in a second cylinder, the movements of the valve being controlled by a timing cam; work loading and ejecting mechanism also is provided controlled by fluid pressure means. The machine comprises a bed 10 on which is mounted a fixed axis, a grinding-wheel 11, and in a slide 14 a regulating wheel 12. The slide 14 carries a nut 15 in which engages a screwed part 16 of a shaft 17 having mounted thereon for rotation, but not axial movement, by means of ball thrust bearings 85, a piston 18 movable in a cylinder 19 integral with a bracket 20 mounted oil the bed 10. The shaft 17 carries a hand-wheel 21 so that the slide 14 can be. adjusted manually in order that, for all work diameters, the piston 18 mav have the same initial position, movement therefrom serving to approach the regulating - wheel towards the grinding - wheel. The slide is retracted from the advanced operative position by another piston 22 moving in a cylinder 24 and having a stroke equal to the sum of the stroke of the piston 18 and movement due to the screw 16. Workpieces 25 shown as having pointed ends 26 are fed from a hopper 28 by a pusher 29 which moves each piece successively to working position on a rest 31, the pusher being connected to a piston 37 moving in a cylinder 38; when the work is ground to size the regulating-wheel is retracted and the work falls from the rest into a shoot 33. The cylinder 38 has ports 40, 41 connected to ports 44, 45 of a reversing valve 46, to a port 47 of which fluid is fed by a pump 48 from a reservoir 50, the valve also having exhaust ports 51, 52 leading to the reservoir. The valve comprises a plunger 54 with annular grooves 56, 57 and the plunger is pressed by reduced fluid pressure against an adjustable screw 96 carried by an arm 55 connected to the shaft 17. The movements of the piston 18 are controlled by a follow-up valve 58 comprising a slidable sleeve 59 in which is slidable a plunger 60, the sleeve having annular grooves 61, 64, 66 holes connecting the groove 64 to the interior of the sleeve to form a port 68 normally 'closed by a spool 69 on the plunger, so'that movement of the plunger 60 to the left allows fluid to flow from port 47 through a. passage 62, an annular groove 71 in plunger 60 and a passage 65 to the cylinder 19; reverse movement connects port 68, through an annular groove 72 in the plunger 60 to an exhaust port 73. The plunger 60 is held by reduced fluid pressure against a plunger 74 carrying a roller 75 engaging a cam-wheel 76; the sleeve 59 also is held by fluid pressure against the arm 55. The return movement piston 22 has an area less than that of the piston 18 and is constantly under full fluid pressure by a pipe 82. The reduced pressure for holding the valves in position is obtained by means of two check valves 97, 98 arranged in series, a connecting pipe 100 leading to the spaces 101, 102; a throttle' valve 106 serves to regulate the speed of the loading piston 37. The machine operates in a cycle controlled by the cam 76, which is rotated through reduction gearing by an electric motor and is shaped to give a dwell 117 for retraction of the work pusher 29, followed by a sharp rise 118 to cause rapid movement of the piston and regulating wheel to cortract the grinding throat, the plunger 54 being moved to cause the work pusher to insert a new workpiece, a dwell 120 being provided to allow of completion of this movement. The cam then has a slow rise 122 for rough grinding, followed by a dwell 123 for sparking out, this again being followed by a sudden fall 124 for retraction-of the regulating-wheel to allow the work to fall off the rest 31. The'arm 55 is supported on the shaft 17 by double thrust bearings 92.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US516887XA | 1937-07-16 | 1937-07-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB516887A true GB516887A (en) | 1940-01-15 |
Family
ID=21972791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB20625/38A Expired GB516887A (en) | 1937-07-16 | 1938-07-12 | Improvements in or relating to grinding machines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB516887A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107639415A (en) * | 2017-09-28 | 2018-01-30 | 梁启明 | A kind of regulating valve kludge |
CN110253391A (en) * | 2019-07-15 | 2019-09-20 | 珠海格力智能装备有限公司 | polishing device |
CN110614546A (en) * | 2019-09-23 | 2019-12-27 | 大昌汽车部件股份有限公司 | Automatic production equipment for piston of clamp |
CN111219375A (en) * | 2020-03-03 | 2020-06-02 | 马鞍山市卡迈特液压机械制造有限公司 | Hydraulic breaking hammer reversing valve |
CN112405141A (en) * | 2020-10-29 | 2021-02-26 | 许磊 | Pipe equipment of polishing |
-
1938
- 1938-07-12 GB GB20625/38A patent/GB516887A/en not_active Expired
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107639415A (en) * | 2017-09-28 | 2018-01-30 | 梁启明 | A kind of regulating valve kludge |
CN107639415B (en) * | 2017-09-28 | 2024-01-12 | 梁启明 | Adjusting valve assembling machine |
CN110253391A (en) * | 2019-07-15 | 2019-09-20 | 珠海格力智能装备有限公司 | polishing device |
CN110253391B (en) * | 2019-07-15 | 2024-03-08 | 珠海格力智能装备有限公司 | Polishing device |
CN110614546A (en) * | 2019-09-23 | 2019-12-27 | 大昌汽车部件股份有限公司 | Automatic production equipment for piston of clamp |
CN110614546B (en) * | 2019-09-23 | 2021-07-23 | 大昌汽车部件股份有限公司 | Automatic production equipment for piston of clamp |
CN111219375A (en) * | 2020-03-03 | 2020-06-02 | 马鞍山市卡迈特液压机械制造有限公司 | Hydraulic breaking hammer reversing valve |
CN112405141A (en) * | 2020-10-29 | 2021-02-26 | 许磊 | Pipe equipment of polishing |
CN112405141B (en) * | 2020-10-29 | 2022-06-21 | 维格斯(上海)流体技术有限公司 | Pipe equipment of polishing |
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