GB1487961A – Machine tools
– Google Patents
GB1487961A – Machine tools
– Google Patents
Machine tools
Info
Publication number
GB1487961A
GB1487961A
GB1830/74A
GB183074A
GB1487961A
GB 1487961 A
GB1487961 A
GB 1487961A
GB 1830/74 A
GB1830/74 A
GB 1830/74A
GB 183074 A
GB183074 A
GB 183074A
GB 1487961 A
GB1487961 A
GB 1487961A
Authority
GB
United Kingdom
Prior art keywords
assembly
piston
belt
wheel
wedge
Prior art date
1974-01-15
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
GB1830/74A
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.)
Centrax Ltd
Original Assignee
Centrax Ltd
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.)
1974-01-15
Filing date
1974-01-15
Publication date
1977-10-05
1974-01-15
Application filed by Centrax Ltd
filed
Critical
Centrax Ltd
1974-01-15
Priority to GB1830/74A
priority
Critical
patent/GB1487961A/en
1975-01-09
Priority to US05/539,846
priority
patent/US4000583A/en
1977-10-05
Publication of GB1487961A
publication
Critical
patent/GB1487961A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
B24B21/18—Accessories
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
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
Abstract
1487961 Grinding CENTRAX Ltd 13 Jan 1975 [15 Jan 1974] 01830/74 Heading B3D A machine tool comprises means for removing material from a workpiece supported by supporting means and movable along a predetermined path relative to the supporting means, and compensating means arranged to superimpose on the movement a compensating movement of the material-removing means relative to the supporting means at such a predetermined rate and in such a direction that the wear on the material-removing means is at least partly offset. As described, the machine tool is for polishing a turbine blade, which is mounted on a face plate 11 (Fig. 1) and a material-removing means is an abrasive belt 19. The face plate is rotatably mounted in a headstock 2 and driven by an hydraulic motor 7 which also drives a face plate 8 carrying a cam 9 corresponding to the shape of the turbine blade. The headstock is reciprocatable along guideways 3 by a piston- and-cylinder device 4, 5. The spindle carrying the face plate 11 also carries a cam 12 which co-operates with a follower 13 controlling a valve 14 which, in turn, controls the flow of fluid to motor 7 and the instantaneous rate of rotation of the face plates 8, 11. The abrasive belt 19 and a follower 17 for engaging the cam 9 are mounted on an assembly 16 pivoted about an axis 20 on a block 15 on the bed 1 of the machine by a pneumatic piston-and-cylinder device 21. The abrasive belt is guided over a pulley 23, Fig. 3, driven by an electric motor, idler pulleys 25, 27, 29 an idler pulley 26 acted upon by levers 32, 34 and a piston-and-cylinder assembly 35 to tension the belt, and a contact wheel 28. The contact wheel 28 is mounted on an arm 41 which is biased by an adjustable spring 42 about the pivotal axis 20 about which assembly 16 is moved by the device 21, the spring determining the pressure with which the contact wheel is pressed against the workpiece. The upper end of arm 41 engages one end of a lever 46 mounted on a vertical pivot 50, the other end of the lever co-operating with an adjustable stop and a microswitch to stop operation of the machine when the workpiece is to size. The follower 17 is in the form of a wheel which is mounted on an assembly 200 adjustable along slides 202 on the belt drive assembly 16 towards or away from the cam 9 to determine the size of the workpiece and to compensate for wear on the abrasive belt. The assembly 200 is clamped in its adjusted position by movement of a piston 208, Fig. 2, of a pneumatic cylinder 206, the piston having a wedge surface 212 which co-operates with a wedge surface 214 on a clamp bolt 216 passing through an elongated slot in the assembly 200. The assembly is movable along the slide 202, when the clamp is released, by compressed air acting first in the left hand side of a cylinder 224 having a piston 226, Fig. 6, secured to the casting 204 of the belt drive assembly 16, and then to the right hand side of the piston, the action also indexing the compensating means which limits the movement of the assembly 200 on the slide 202. The compensating means consists of a wedge 232 on a carrier 234, Figs. 5 and 6, urged in one direction along slides 236 of the casting 204 by a pneumatic piston-and-cylinder assembly 238, the wedge being engaged by an abutment 248 on the assembly 200 carrying the follower wheel 17. The abutment is adjustable by a knob 252 and has two surfaces for selective engagement with the wedge according to whether coarse or fine polishing is to be effected. The position of the wedge carrier is determined by engagement of one of a number of pins 240 arranged in two rows on the carrier with an abutment surface on the casting. As each reciprocation of the assembly 200, a trigger 244 fastened thereto acts to move the engaged pin into the carrier against the pressure of an associated spring so that the carrier is urged by the pressure in devcie 238 to engage the next pin 240 with the casting 204 whereby the assembly 200, and hence the follower 17, are advanced an micromental distance relative to the belt assembly 16 to compensate for wear of the belt 19. A belt crushing mechanism comprising a wheel 256, Fig. 3, which can be pressed by movement of a lever 258 upon actuation of a piston-and-cylinder device 262 against the idler wheel 25, the wheel having a waisted profile which co-operates with the crowning of the idler wheel 25 to flex and thus soften an initially flat newly-fitted belt 19.
GB1830/74A
1974-01-15
1974-01-15
Machine tools
Expired
GB1487961A
(en)
Priority Applications (2)
Application Number
Priority Date
Filing Date
Title
GB1830/74A
GB1487961A
(en)
1974-01-15
1974-01-15
Machine tools
US05/539,846
US4000583A
(en)
1974-01-15
1975-01-09
Belt-type abrader with means to compensate for tool wear
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB1830/74A
GB1487961A
(en)
1974-01-15
1974-01-15
Machine tools
Publications (1)
Publication Number
Publication Date
GB1487961A
true
GB1487961A
(en)
1977-10-05
Family
ID=9728750
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1830/74A
Expired
GB1487961A
(en)
1974-01-15
1974-01-15
Machine tools
Country Status (2)
Country
Link
US
(1)
US4000583A
(en)
GB
(1)
GB1487961A
(en)
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN103659533A
(en)
*
2013-12-06
2014-03-26
乔登卫浴(江门)有限公司
Polishing abrasive tool used for machining reverse-buckling handle
CN108972291A
(en)
*
2018-07-27
2018-12-11
东莞市铁犀智能科技有限公司
A kind of polishing machine
CN109909881A
(en)
*
2019-04-18
2019-06-21
杭州欣亿广告有限公司
A kind of polissoir
Families Citing this family (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US20050159840A1
(en)
*
2004-01-16
2005-07-21
Wen-Jong Lin
System for surface finishing a workpiece
US8696407B2
(en)
2007-12-21
2014-04-15
Darex, Llc
Cutting tool sharpener
CN102303275B
(en)
*
2011-08-11
2013-12-04
西北工业大学
Flexible polishing mechanism for blade profile abrasive belt
CN103111932B
(en)
*
2013-01-18
2015-06-24
东营胜利高原有限公司
Positive displacement motor rotor polishing machine tool device
CN105500159B
(en)
*
2015-11-30
2017-06-06
江门市亚泰智能抛磨科技有限公司
A kind of abrasive band polishing double compensation device
Family Cites Families (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB1213631A
(en)
*
1966-11-18
1970-11-25
Wickman Mach Tool Sales Ltd
Profile grinding machines
US3791084A
(en)
*
1970-10-16
1974-02-12
Toyoda Machine Works Ltd
Grinding machine with wheel dress compensating apparatus
US3727350A
(en)
*
1971-11-16
1973-04-17
Sundstrand Engelberg
Contour grinder
US3782046A
(en)
*
1972-02-02
1974-01-01
Ford Motor Co
Tool rest for grinding wheel with automatic wear compensation
1974
1974-01-15
GB
GB1830/74A
patent/GB1487961A/en
not_active
Expired
1975
1975-01-09
US
US05/539,846
patent/US4000583A/en
not_active
Expired – Lifetime
Cited By (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN103659533A
(en)
*
2013-12-06
2014-03-26
乔登卫浴(江门)有限公司
Polishing abrasive tool used for machining reverse-buckling handle
CN103659533B
(en)
*
2013-12-06
2016-04-27
乔登卫浴(江门)有限公司
A kind of polishing abrasive tool for processing back-off handle
CN108972291A
(en)
*
2018-07-27
2018-12-11
东莞市铁犀智能科技有限公司
A kind of polishing machine
CN109909881A
(en)
*
2019-04-18
2019-06-21
杭州欣亿广告有限公司
A kind of polissoir
CN109909881B
(en)
*
2019-04-18
2020-07-28
恒吉集团实业有限公司
Polishing equipment
Also Published As
Publication number
Publication date
US4000583A
(en)
1977-01-04
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Legal Events
Date
Code
Title
Description
1978-02-15
PS
Patent sealed [section 19, patents act 1949]
1980-08-28
PCNP
Patent ceased through non-payment of renewal fee
