WO2008044240A1 - Automatic grinding/buffing machine for rubber cot arbors - Google Patents

Automatic grinding/buffing machine for rubber cot arbors Download PDF

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Publication number
WO2008044240A1
WO2008044240A1 PCT/IN2007/000045 IN2007000045W WO2008044240A1 WO 2008044240 A1 WO2008044240 A1 WO 2008044240A1 IN 2007000045 W IN2007000045 W IN 2007000045W WO 2008044240 A1 WO2008044240 A1 WO 2008044240A1
Authority
WO
WIPO (PCT)
Prior art keywords
arbour
grinding
unit
arbours
unfinished
Prior art date
Application number
PCT/IN2007/000045
Other languages
French (fr)
Inventor
Jitendra Ishwarbhai Mevada
Naresh Amrutlal Mistry
Original Assignee
Jitendra Ishwarbhai Mevada
Naresh Amrutlal Mistry
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
Application filed by Jitendra Ishwarbhai Mevada, Naresh Amrutlal Mistry filed Critical Jitendra Ishwarbhai Mevada
Publication of WO2008044240A1 publication Critical patent/WO2008044240A1/en

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/74—Rollers or roller bearings
    • D01H5/80—Rollers or roller bearings with covers; Cots or covers
    • 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
    • B24B5/22—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 for grinding cylindrical surfaces, e.g. on bolts
    • 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
    • B24B5/36—Single-purpose machines or devices
    • B24B5/37—Single-purpose machines or devices for grinding rolls, e.g. barrel-shaped rolls

Definitions

  • This invention relates to an automatic rubber cot arbour grinding/buffing machine.
  • this invention relates to an automatic rubber cot arbour grinding/buffing machine in which auto sequence of various machine operations is made quite smooth and easy with large storage of arbours in minimum space resulting into less stoppages and high productivity and which needs very less floor area and has Ergonomic Design Aspects.
  • Rubber cot arbour mainly comprises a steel spindle or axle provided with one or two rubber cots used as top rollers in Ring Frame, Speed Frame, Draw Frame, Combers, etc. of cotton/synthetic yarn spinning mills, in the textile industries.
  • the arbours or top rollers used in Draw Frames or Combers are provided with single long cot upto 400 mm in length in the middle of the axle portion, while the arbours or top rollers used in Ring Frames or Speed Frames are provided with a pair of cots, one each at the two ends of the axle.
  • the cots are preferably made of rubber.
  • a very large number of top rollers or rubber cot arbours are used in a Spinning mill/machine, which work continuously at a high speed. Regular grinding of the rubber cot arbours is required for ensuring quality of yarn by reducing thread breaks and minimizing lap formation.
  • Generally centreless grinding is used for rubber cot arbours of Ring Frames and Speed Frames and ⁇ with center grinding' is used for Draw Frames and Comber Cots.
  • the grinding machines for manual grinding of cots are known in the prior art which generally comprises of a manual arbour loading and unloading systems which are prone to accidents during loading and unloading of the arbours. Cot size is measured manually and grinding stone dressing is carried out manually which is time consuming resulting into less productivity.
  • the existing automatic grinding machine comprises PLC Controlled Rubber Cot arbour auto feeding device, a cot diameter measuring system with automatic
  • LCD display combined with centerless system in which faulty cot will also be conveyed through the system, centreless grinding system with attachment for Ring Frame and Speed Frame cots, variable table traverse, either manually operated or hydraulically operated and operating programs for grinding to size viz. grinding to a fixed diameter or differential grinding i.e. grinding a specified amount off different diameters, sorting system with or without grinding and means for dressing the grinding wheel.
  • Rubber Cot diameter measuring system is combined with centreless grinding device which is complicated and takes more time, thereby affecting production rate of the machine.
  • the main object of this invention is to obviate the above mentioned drawbacks and limitation of the automatic cot arbour grinding machine and to provide an automatic rubber Cot arbour ⁇ grinding/buffing machine which has large storage capacity of magazines for storing unfinished as well as finished arbours in minimum space and both the storage magazines are provided on one side of the grinding head unit and which has low branching of conveying system making non complicated shorter path and machine occupying less floor space with high capacity, less stoppage and high productivity.
  • Another object of this invention is to provide an automatic rubber cot arbour grinding machine in which cot diameter measuring device is separated from centreless grinding device making the operation sequential and faster resulting i ⁇ to higher productivity.
  • Another object of this invention is to provide ,an automatic rubber cot arbour grinding machine which is quite compact and having
  • a further object of this invention is to provide an automatic rubber cot arbour grinding machine which is suitable for smooth auto sequencing of operations, needs less attention of operator allowing him to attend other operations and thus, utilizing less man hour.
  • a further object of this invention is to provide an automatic rubber cot arbour grinding machine in which grinding wheel unit is moving or traversing while grinding and the centreless device unit is non traversing or resting which is more suitable for proper auto sequencing.
  • a further object of this invention is to provide an automatic rubber cot arbour grinding machine in which dressing of the grinding wheel is automatically carried out at predetermined operation cycles.
  • An automatic rubber cot arbour grinding/buffing machine comprising an unfinished arbour storage unit/loading magazine.
  • an unfinished arbour conveyer unit provided to the adjacent to the said loading magazine for taking the arbour from the said loading magazine and smooth conveying to a measuring unit or a carriage one by one
  • a rubber cot diameter measuring unit for measuring the cot diameter one by one and comparing with the predetermined set diameter as per programmed for rejecting of the arbours not suitable for grinding in a rejection tray
  • a loading -unloading carriage provided adjacent to the said measuring unit, for loading unfinished arbour to an arbour holder unit for grinding and simultaneously unloading finished arbour after grinding into a finished arbour conveyer unit
  • a centre less rubber cot arbour holding and guiding device provided substantially perpendicularly to the said arbour loading- unloading carriage, for one by one holding and precisely guiding the unfinished arbour for grinding and pushing out the finished
  • this invention provides the arbour grinding machine , in which the said loading magazine or the said unloading magazine comprises of a plurality of trays arranged vertically in a space apart manner in a pair of columns, mounted on a pair of frames keeping the two trays of a pair at a same level with the adjustable central gap forming a straight track for the arbours, an adjusting means such as rack and pinion, screw and nut or the like provided on the said frame for adjusting the central gap between the two columns of the trays, according to the size/gauge of the arbours, either manually by rotating a handle or by using an electric motor, or the like, the said trays forming tracks of the loading magazine being downwardly inclined towards the unfinished arbours conveyer unit magazine being downwardly inclined away from the finished arbour conveyer unit.
  • the said loading magazine or the said unloading magazine comprises of a plurality of trays arranged vertically in a space apart manner in a pair of columns, mounted on a pair of frames keeping the two trays of a pair at a same
  • the invention providing the arbour grinding machine, in which the said unfinished arbour conveyer unit or the said finished arbour conveyor unit comprises of a plurality of jaws mounted on a chain, the said chain mounted movably on a pair of chain wheels with bearing blocks, the said chain wheel with bearing blocks mounted on a pair of columns, one column being fixed and the other being adjustable, according to the gauge of the rubber cot arbours by an adjusting means such as rack and pinion, screw and nut or the like, either manually or by using a prime mover such as an electric motor or a hydraulic or pneumatic device, the said columns preferably supported on another pair of strong columns fixed on a main frame, a spline shaft with bearing provided on the said columns for driving the said chain wheels with the help of prime mover like electric motor through drive mechanism, each of the said jaws are provided with an inclined slots the two arbour conveyer units for unfinished and finished arbours being rotated in the direction opposite to each other and the slot in the jaws of the two units being inclined in the opposite direction to each other
  • the invention providing the arbour grinding machine, in which the said rubber cot diameter measuring unit comprises of a box, an arbour resting jaw having a pair of guide rods with linear bearing and a hydraulic or pneumatic cylinder provided in the said box for pushing the arbours towards a cot diameter measuring device(s) provided on the said box, the said measuring device selected from a contact type electronic dial gauge or an electronic probe or non contact type digital imaging system or ultra sonic or laser type measuring device giving a digital or analog out put on a LC.
  • the said rubber cot diameter measuring unit comprises of a box, an arbour resting jaw having a pair of guide rods with linear bearing and a hydraulic or pneumatic cylinder provided in the said box for pushing the arbours towards a cot diameter measuring device(s) provided on the said box, the said measuring device selected from a contact type electronic dial gauge or an electronic probe or non contact type digital imaging system or ultra sonic or laser type measuring device giving a digital or analog out put on a LC.
  • the said jaw being provided with a centrally divided bridge track unit with adjusting means such as rack and pinion, screw and nut or the like for adjusting the central gap according to the size/gauge of the arbours, either manually or by using an electronic motor or any other prime mover and a rejection tray provided for collecting the rejected arbours not suitable for grinding.
  • adjusting means such as rack and pinion, screw and nut or the like for adjusting the central gap according to the size/gauge of the arbours, either manually or by using an electronic motor or any other prime mover and a rejection tray provided for collecting the rejected arbours not suitable for grinding.
  • the invention providing the arbour grinding machine, in which the said cot diameter, measuring unit is provided on the carriage ahead of the grinding head unit to receive the unfinished arbours, one by one, from the unfinished arbour conveyer unit for measuring the cot diameter of unfinished arbours for removing the unsuitable arbours by rejecting and collecting in the rejection tray and loading only the suitable unfinished arbours on the loading -unloading carriage to be taken for grinding.
  • the invention providing the arbour grinding machine, in which the cot diameter measuring unit is provided in between unfinished arbour conveyer unit & arbour loading- unloading carriage, before the grinding head unit, to measure the cot diameters of finished arbours and removing the unsuitable arbours and collecting them into the rejection tray and allowing only the suitable arbours to be conveyed by the finished arbour conveyer unit, into unloading magazine.
  • the invention providing the arbour grinding machine, in which the said loading - unloading carriage comprises of a plate mounted on a linear slide, driven by an electric motor or by a pneumatic or hydraulic means or the like, a bridge track unit assembly provided at each end of the said plate, a stopper provided on each bridge track, unit the said stopper being a pneumatic or hydraulic or a mechanical stopper, a central space adjusting means such as rack and pinion screw and nut, or like provided on each bridge track unit for adjusting the central space according to the size/ gauge of the arbours, the said adjusting means being operated either manually or by any prime mover like electric motor, the said bridge track assembly units provided on two ends of the plate, on two opposite sides of the arbour holder unit, one assembly conveys the unfinished arbour to the arbour holder unit and the other assembly simultaneously conveys the finished arbour to the conveyer unit.
  • the said bridge track assembly units provided on two ends of the plate, on two opposite sides of the arbour holder unit, one assembly conveys the
  • the said centre less rubber cot arbour holding and guiding device comprises of a box, a T- bracket, guided on a needle or ball bearing housings, coupled with a rotary device such as a pneumatic rotary device or a electro mechanical device or the like mounted on the said box, a fixed shaft fitted on the said T- bracket, an arbour clamp fixed on the said fixed shaft for holding an arbour for grinding, a resting support and an ejector fitted with pneumatic / hydraulic cylinder provided on the said box, for pushing the finished rubber cot arbour after grinding, on the carriage , a guiding device provided on the said box, the said guiding device consists of a knurled shaft and a rubber dust cleaning brush provided adjacent to the parallel to the said knurled shaft, the said guiding device guided on a needle, or ball bearing pedestals and driven by a prime mover, such as A.C. or D. C. geared motor, in clock wise and/ or anticlock wise
  • a prime mover such as A.
  • the invention providing the arbour grinding machine in which a suction device is provided on the said box for sucking out the rubber dust created during grinding/buffing operation of the rubber cots of the arbours.
  • the invention providing the arbour grinding machine in which the said grinding wheel head unit comprises of three parts viz:upper, middle and lower, an emery stone wheel fixed on a sleeve fitted on a shaft guided at both ends in ball or roller bearing housings and rotated by a prime mover such as A.C. or D. C.
  • the invention providing the arbour grinding machine in which the said needle cages are preferably made of brass or plastic.
  • the invention providing the arbour grinding machine in which the plastic cages are molded in a single element assembled by dove tail snap joints at the ends.
  • the invention providing the arbour grinding machine in the which the said grinding wheel head unit is set to grind the rubber cots of the arbours as per fix diameter or as per fix cut , according to the requirement, which is preprogrammed controlled by the central panel.
  • the invention providing the arbour grinding machine in which the said dressing tool unit for dressing the emery - stone wheel, at a predetermined interval, each time, after grinding a desired number of rubber cots of the arbours comprises of a base plate provided with a linear motion guide unit consisting of a pair of blocks and rails, a carriage fitted with a diamond dresser tool and a precession ball screw and nut assembly and an A.C. or D. C. electric geared motor or the like, prime mover provided for rotating the said screw in clock wise or anticlock wise direction.
  • the invention providing the arbour grinding machine in which the said control panel is an electronic control panel having a display screen for setting, controlling and displaying all the operational sequences as per desired program of the automatic arbour grinding machine.
  • the invention providing the arbour grinding machine, in which the said machine is having a body with doors and windows forming a completely closed machine during grinding operations, and a transparent window cover provided against the grinding wheel head unit for keeping the operation visible to the operator, from the outside.
  • Fig.l Shows from view/elevation, without side covers of the automatic rubber cot arbour grinding/buffing machine, according to an embodiment of this invention.
  • Figs. 2 & 3 Show top view/plan and side view, respectively, of the grinding machine shown in Fig.l. Figs. 4, 5 & 6 : Show front view, top view and side view, respectively, of the unfinished rubber cot arbour storage unit or system/loading magazine for storing unfinished arbours, i.e. before grinding/buffing of the rubber cots.
  • Figs. 7, 8 & 9 Show front view, top view and side view, respectively, of the finished rubber cot arbour storage unit or system/unloading magazine for unloading and storing finished arbours i.e. after grinding/buffing the rubber cots.
  • Figs. 10 & 11 Show front view and side view, respectively, of the unfinished rubber cot arbour conveyor unit or system.
  • Figs. 12 & 13 Show front view and side view, respectively of the finished rubber cot arbour conveyor unit or system.
  • Figs. 14 & 15 Show front view and side view, respectively, of the rubber cot diameter measuring unit or system.
  • Figs. 16, 17 & 18 Show left side view, top view and right side view, respectively, of the rubber cot arbour loading/unloading carriage for loading rubber cot arbour and unloading finished rubber cot arbours.
  • Figs. 19 & 20 Show top view and side view, respectively, of the centreless rubber cot arbour holding and guiding unit or system of the automatic rubber cot arbour grinding/buffing machine.
  • Figs. 21, 22 & 23 Show front view, top view and sectional plan of the grinding wheel head unit or system of the automatic rubber cot arbour, grinding /buffing machine.
  • Figs. 24 & 25 Show front view and top view, respectively, of the diamond dressing tool unit or system of the automatic rubber cot arbour grinding/buffing machine.
  • Fig. 26 Show perspective view of the automatic rubber cot arbour grinding/buffing machine with covers and electronic control panel.
  • Fig. 27 Show front view, respectively, part of machine working sequence, loading rubber cot arbour from unfinished rubber cot arbour storage unit or system to reject tray by use of unfinished rubber cot arbour conveyor unit or system through rubber cot diameter measuring unit or system & rubber cot arbour loading/unloading carriage.
  • Fig. 28 Show front view, respectively, part of machine working sequence, rubber cot arbour present on rubber cot arbour loading/unloading carriage which is coming from rubber cot diameter measuring unit.
  • Fig. 29 Show front view, respectively, part of machine working sequence, centre less rubber cot arbour holding device rotating toward grinding wheel head unit or system, rubber cot arbour which is present on rubber cot arbour loading/unloading carriage is moving toward centre less rubber cot arbour holding and guiding unit or system.
  • Fig. 31 Show top view, respectively, part of the machine working sequence, diamond dresser which is part of diamond dressing tool unit or system moving toward opposite of its initial position during dressing sequence.
  • Fig. 32 Show front view, respectively, part of the machine working sequence, diamond dresser which is part of diamond dressing tool unit or system touch to grinding wheel surface during dressing sequence.
  • the automatic rubber cot arbour grinding/buffing machine (1) comprises of an unfinished rubber cot arbour storage unit/system or loading magazine (2) for safely storing a large number of unfinished rubber cot arbours (3) while occupying minimum floor space; a finished rubber cot arbour storage unit/system or unloading magazine (4) for safely storing a large number of finished rubber cot arbours (5) while occupying minimum floor space, provided parallely and adjacent to the unfinished rubber cot arbours loading magazine (2) an unfinished rubber cot arbour conveyor unit/system (6) for conveying the unfinished rubber cot arbours (3) from loading magazine (2) to a measuring unit (7) one by one quickly, without consuming much time or wasting any time; a loading/unloading carriage (8) for loading the unfinished rubber cot arbour, preferably after measuring the diameter of rubber cot in the measuring unit (7) and when not rejected but found suitable for grinding and simultaneously in sequence unloading the finished rubber cot arbour
  • the unfinished rubber cot arbour storage. unit/loading magazine (2) shows in figs. 4, 5 & 6 provides safety against unfinished rubber cot arbour damage, while storing a large number of arbours say e.g. 500 numbers and occupying minimum floor space.
  • the loading magazine (2) comprises a plurality of trays (16) arranged vertically in a spaced apart manner in a pair of columns i.e. two trays provided at the same level with the adjustable gap (17) in therebetween, forming straight track which is mounted on a pair of frames (18), preferably made of aluminum or mild steel.
  • the pair of frames (18) are provided with adjusting means (19) such as rack and pinion or screw and nut for adjusting the central gap (17) between the two columns of the trays (16), either manually by rotating a handle (20) or with the help of motor (not shown).
  • the size of the arbours may vary according to the spinning mills and, hence by adjusting the central gap (17) different size arbours are accommodated in the storage units/magazines.
  • a large number of arbours say 500 numbers are stored safely in the racks of loading magazine (2) there by occupying minimum floor space.
  • the unfinished arbours loading magazine (2) and the finished arbour unloading magazine (4) shown in Figs.7, 8 & 9 are similar in construction, the only difference being that the trays (16) of the loading magazine (2) are kept inclined downwards towards the conveyor system (6) while the trays (21) of the unloading magazine (4) are kept inclined downwards away from the conveyor system
  • the Unfinished rubber cot arbour conveyor unit/system (6) as shown in FIGS. 10 & 11 comprises a plurality of specially designed jaws (22), mounted on a chain (23) with specially designed pin, nut and washer (24), moving on a pair of chain wheels (25) with bearing blocks (26) and are driven by an A. C. or D. C. motor (27) or any other prime mover, through a drive mechanism (28).
  • Electric motor is preferably a geared motor suitable to rotate the chain (23) in clockwise or anti-clockwise direction.
  • the Steel columns (30) are fixed on the main frame (14) of the grinding machine.
  • the adjustable aluminum column (29) with chain(23) and Jaws (22) is adjusted, according to the gauge/size of the rubber cot arbour(3) with the help of adjusting means (32), consisting of rack and pinion or screw and nut system, either manually with the help of a handle (33) or by electric motor (not shown).
  • the unfinished rubber cot arbours (3), from the loading magazine (2) are conveyed to a measuring unit (7) or to the carriage (8), one by one, very quickly and smoothly, with out wasting any time.
  • the jaw (22) is having a slot (34), for accommodating therein the arbour axle. This slot (34) is inclined towards the measuring unit (7) or carriage (8) for easy sliding out of the arbour (3).
  • the unfinished arbour conveyor system (6) and the finished arbour conveyor system (10), as shown in FIGS. 12 & 13, are similar in construction. The only difference being that the slot (34) in the jaws
  • the conveyor systems (10) picks the finished arbours (5) after grinding, from the carriage (8) one by one smoothly and unload them smoothly into the trays (16) of the finished arbour storage magazine (4), one by one without any damage and without wasting any time.
  • the measuring unit/system (7) as shown in FIGS. 14 & 15 comprises a box (35), open at two sides and preferably made of metal by moulding, such as light weight moulded Aluminum.
  • a rubber cot arbour resting jaw (36) having a pair of guide rods (37) with linear bearings (38) and a pneumatic/hydraulic cylinder (39) are provided in the box (35), for pushing the finished or unfinished rubber cot arbours, vertically or horizontally towards the cot diameter measuring device (40) provided at the top of the box (35).
  • the measuring device (40) is selected from a contact type electronic dial gauge or electronic probe or non contact type digital imaging system or ultra sonic or laser type which gives a digital or analog out put on a L.C. display.
  • the rubber cot arbour for Ring Frame consist of two rubber cots at the two end of the steel axle, accordingly a pair of measuring devices (40) are provided at the top of the box (35).
  • the unfinished rubber cot arbours from the loading magazine (2) are picked up one by one by the jaws (22) of the conveyor unit (6) and are conveyed one by one to the measuring unit (7), in case the measuring unit is provided to measure the diameter of the unfinished rubber cot arbours (3).
  • the unfinished arbour (3) rests of the jaw (36) of the measuring unit (7) and is pushed towards the measuring means (40) with the help of hydraulic/pneumatic cylinder (39).
  • the pre-set range of rubber cot diameter, which is acceptable for grinding, is selected and pass on to the carriage (8) and the arbours which fall out of the range are rejected and delivered to a rejection tray(92).
  • the suitable arbours are further carried by the carriage (8) for grinding, thereby increasing the productivity.
  • each of the assembly (45 & 46) is made adjustable for central space and provided with adjusting means (49 , 50) which can be a screw and nut type or Rack and pinion type adjusting means and can be operated manually or by an electric motor or the like.
  • the assemblies (45 & 46) are provided on the two opposite sides of the arbours holder unit (9) or grinding wheel head unit (11).
  • One assembly (45) is provided on measuring unit side to convey one by one unfinished rubber cot arbour (3) to the rubber cot arbour holder unit (9) when found suitable for grinding, or otherwise to the rejection tray (92), and the other is provided towards finished rubber cot arbour unloading magazine (4) for unloading the finished arbour (5), after grinding.
  • the feeding of unfinished arbour (3) to arbour holder unit (9) and unloading of finished arbour (5) after grinding is carried out simultaneously in a smooth sequential operation, without wasting any time, resulting into higher productivity.
  • the centre less rubber cot arbour holding and guiding device (9) also termed as arbour holder unit (9), as shown in FIGS. 19 & 20 comprises a box (51) which is preferably a metal box made of moulded cast iron or fabricated steel box.
  • a ⁇ T' - type bracket (52), guided on needle or ball bearing housings (53) is coupled by a coupling (54) with a rotary device (55) which can be a pneumatic rotary device or electro mechanical device.
  • a fixed shaft (56) is fitted on the T-bracket (52) for fixing a rubber cot arbour clamp (57).
  • a resting support (58) and an ejector (59) fitted with pneumatic/hydraulic cylinder are provided on the box (51) for pushing the finished rubber cot arbour (5), after grinding, on to the carriage (8).
  • a guiding device is also provided on the box (51).
  • the said guiding device consists of a knurled shaft (60) along with a rubber dust cleaning brush (61), guided on needle or ball bearing pedestals (62) and driven by preferably an A. C. or D. C. geared motor (63) in clockwise and/or anticlockwise direction.
  • a suction device (64) is also provided for sucking out the rubber dust produced during grinding/buffing operation of the rubber cots.
  • the arbour holder unit (9) is used to hold and guide the rubber cot arbour during grinding operation, precisely. It is ratable at its home position in grinding zone. All the rubber particles produced are extracted by the efficient suction of the suction device (64) provided with the arbour holder unit (9).
  • the grinding wheel head unit/system (11), as shown in FIGS. 21, 22 & 23 is made in three parts viz, an upper part, a middle part and a lower part.
  • the upper part comprises of an emery stone wheel (65) fixed on a sleeve (66) is fitted on a steel shaft (67), by a check nut (68).
  • the shaft (67) is guided at both ends in ball or roller bearing housings (69) and rotated by an A.C. or D. C. motor (70) to drive the wheel (65) clockwise or anticlockwise.
  • the emery stone wheel assembly is fitted on a cast iron moulded body with cap (71).
  • the middle part comprises of a cast iron moulded body (72) provided with male female rails (73) equipped with needle cages (74) preferably made of plastic or brass.
  • the plastic cages are moulded in a single element which can be assembled by means of dove tail snap joints at the ends.
  • a geared motor provided with eccentric bearing (75) for giving reciprocating movement to the upper part in Y-axis.
  • the lower part comprises fixed body (76) provided with a precession ball screw nut assembly (77, 78), guided in bearing housing (79) to give a traverse movement in X - axis, to provide forward and reverse motion to the middle part along with the upper part with the help of an A.
  • the grinding wheel head unit (11) For grinding the unfinished rubber cot arbour the grinding wheel head unit (11) provides X & Y axis motion to the middle part along with upper part including emery stone wheel and its motor, i.e. the forward and reverse motions in X- axis as well as reciprocating movement in Y - axis. With the provision of moving grinding wheel head unit in X axis & Y axis, the grinding operation of the rubber cot arbour is quite smooth and sequential.
  • the grinding unit can be set to grind or buff the rubber cot as per fixed diameter or as fixed cut.
  • the emery stone grinding wheel dressing tool unit (12) as shown in FIGS. 24 & 25 comprises of a base plate (82), which is preferably a machined steel plate provided with a linear motion guide unit having a pair of blocks and rails (83 & 84).
  • An A.C. or D. C. electric geared motor (89) is provided to rotate the ball screw clockwise and/or anticlockwise.
  • the diamond dressing unit (12) is used for dressing the emery stone grinding wheel (65) at a regular predetermined set interval say after grinding every 1000 numbers of rubber cot arbours and it works automatically as per pre set program.
  • An electronic panel (13) is provided on the grinding machine, having a display screen (90) for setting and controlling all the operational sequences smoothly and displaying the same on the screen (90).
  • the machine is completely closed before starting the grinding and after loading the magazine (2) with unfinished cot rubber arbours (3).
  • the grinding operation is visible through a transparent window cover (91), which can be checked by the operator. After loading and starting the machine, operator is free to attend some other jobs and will be required to attend the machine for loading the unfinished arbours (3) in the loading magazine (2) and unloading the finished arbours (5) from the unloading magazine (4).

Abstract

An automatic rubber cot arbour grinding/buffing machine (1) comprising an unfinished arbour storage unit/loading machine (2), an unfinished arbour conveyer unit (6) provided adjacent to the said loading magazine (2), a rubber cot diameter measuring unit (7), provided adjacent to the said unfinished arbour conveyer unit (S), a loading -unloading carriage (8) provided adjacent to the said measuring unit (7), a center less rubber cot arbour holding and guiding device (9) provided substantially perpendicularly to the said arbour loading-unloading carriage (8), a grinding wheel head unit (11), provided adjacent to the said arbour holder unit (9), movable along X-axis and Y-axis, a dressing tool unit (12), provided adjacent to the said grinding wheel head unit (11), a finished arbour conveyer unit (10), provided adjacent to the said carriage (8) on its unloading end, a control panel (13), all the units being mounted on a main frame (14) and enclosed in a body (15) having suitable doors, windows and covers.

Description

Description
AUTOMATIC GRINDING/BUFFING MACHINE FOR RUBBER COT
ARBORS
BACKGROUND OF THE INVENTION
This invention relates to an automatic rubber cot arbour grinding/buffing machine.
More particularly, this invention relates to an automatic rubber cot arbour grinding/buffing machine in which auto sequence of various machine operations is made quite smooth and easy with large storage of arbours in minimum space resulting into less stoppages and high productivity and which needs very less floor area and has Ergonomic Design Aspects.
Rubber cot arbour mainly comprises a steel spindle or axle provided with one or two rubber cots used as top rollers in Ring Frame, Speed Frame, Draw Frame, Combers, etc. of cotton/synthetic yarn spinning mills, in the textile industries.
The arbours or top rollers used in Draw Frames or Combers are provided with single long cot upto 400 mm in length in the middle of the axle portion, while the arbours or top rollers used in Ring Frames or Speed Frames are provided with a pair of cots, one each at the two ends of the axle. The cots are preferably made of rubber. A very large number of top rollers or rubber cot arbours are used in a Spinning mill/machine, which work continuously at a high speed. Regular grinding of the rubber cot arbours is required for ensuring quality of yarn by reducing thread breaks and minimizing lap formation. Generally centreless grinding is used for rubber cot arbours of Ring Frames and Speed Frames and λwith center grinding' is used for Draw Frames and Comber Cots.
The grinding machines for manual grinding of cots are known in the prior art which generally comprises of a manual arbour loading and unloading systems which are prone to accidents during loading and unloading of the arbours. Cot size is measured manually and grinding stone dressing is carried out manually which is time consuming resulting into less productivity.
Automatic Rubber Cot grinding machines are also known in the prior art and are available in the market under the brand name 1BERKOL'
® manufactured by ΗUBER + SUHNER'. The existing automatic grinding machine comprises PLC Controlled Rubber Cot arbour auto feeding device, a cot diameter measuring system with automatic
LCD display combined with centerless system in which faulty cot will also be conveyed through the system, centreless grinding system with attachment for Ring Frame and Speed Frame cots, variable table traverse, either manually operated or hydraulically operated and operating programs for grinding to size viz. grinding to a fixed diameter or differential grinding i.e. grinding a specified amount off different diameters, sorting system with or without grinding and means for dressing the grinding wheel.
The main drawbacks or limitations of the existing automatic rubber cot arbour grinding machine are as under:- i) Rubber cot arbour storage magazine has low capacity and, hence requires frequent loading and unloading of arbours, needing frequent attention of the operator and taking more time.
ii) Unfinished job arbour magazine entry is over the grinding stone wheel head unit and the exit is from the back side of the grinding wheel resulting into inline or angular longer path, making the machine operations complicated and needing more floor space even with low capacity.
iii) Rubber Cot diameter measuring system is combined with centreless grinding device which is complicated and takes more time, thereby affecting production rate of the machine.
iv) Ergonomic design aspects are absent resulting into complicated operations not suitable for operator, not suitable for easy maintenance, not suitable for visibility of operations by operator and machine is not compact,
v) Large number of drive elements and complicated mechanism causing non smooth working of auto sequence and not serving the purpose of full automation.
vi) Various steps of conveying system are complicated and non sequential resulting into more stoppage and low productivity of the grinding machine.
The main object of this invention is to obviate the above mentioned drawbacks and limitation of the automatic cot arbour grinding machine and to provide an automatic rubber Cot arbour ■ grinding/buffing machine which has large storage capacity of magazines for storing unfinished as well as finished arbours in minimum space and both the storage magazines are provided on one side of the grinding head unit and which has low branching of conveying system making non complicated shorter path and machine occupying less floor space with high capacity, less stoppage and high productivity.
Another object of this invention is to provide an automatic rubber cot arbour grinding machine in which cot diameter measuring device is separated from centreless grinding device making the operation sequential and faster resulting iηto higher productivity.
Another object of this invention is to provide ,an automatic rubber cot arbour grinding machine which is quite compact and having
Ergonomic Design Aspects suitable for easy operation/ easy maintenance and proper visibility of operations by the operator.
A further object of this invention is to provide an automatic rubber cot arbour grinding machine which is suitable for smooth auto sequencing of operations, needs less attention of operator allowing him to attend other operations and thus, utilizing less man hour.
A further object of this invention is to provide an automatic rubber cot arbour grinding machine in which grinding wheel unit is moving or traversing while grinding and the centreless device unit is non traversing or resting which is more suitable for proper auto sequencing. A further object of this invention is to provide an automatic rubber cot arbour grinding machine in which dressing of the grinding wheel is automatically carried out at predetermined operation cycles.
An automatic rubber cot arbour grinding/buffing machine comprising an unfinished arbour storage unit/loading magazine. For safe storing of a large number of unfinished arbours in minimum floor space, an unfinished arbour conveyer unit provided to the adjacent to the said loading magazine for taking the arbour from the said loading magazine and smooth conveying to a measuring unit or a carriage one by one, a rubber cot diameter measuring unit, for measuring the cot diameter one by one and comparing with the predetermined set diameter as per programmed for rejecting of the arbours not suitable for grinding in a rejection tray, a loading -unloading carriage provided adjacent to the said measuring unit, for loading unfinished arbour to an arbour holder unit for grinding and simultaneously unloading finished arbour after grinding into a finished arbour conveyer unit, a centre less rubber cot arbour holding and guiding device provided substantially perpendicularly to the said arbour loading- unloading carriage, for one by one holding and precisely guiding the unfinished arbour for grinding and pushing out the finished arbour after grinding, on to the said carriage for unloading, a grinding wheel head unit provided adjacent to the said arbour holder unit, movable along X-axis and Y-axis for grinding/buffing the rubber cot arbour as per presetting of fixed diameter or fixed cut, a dressing tool unit, provided adjacent to the said grinding wheel head unit, for dressing the grinding wheel after grinding a predetermined number of arbours, a finished arbour conveyer unit, provided adjacent to the said carriage on its unloading and for smoothly conveying the finished arbour one by one to a finished arbour storage unit /unloading magazine provided adjacent to the finished arbour conveyer unit and adjacent to the adjacent and parallel to the said unfinished arbour storage unit /loading magazine and a control panel for controlling all the operations of arbour grinding machine in a sequence as per desired program, all the unit being mounted on a main frame and enclosed in a body having suitable doors, windows and covers.
Typically this invention provides the arbour grinding machine , in which the said loading magazine or the said unloading magazine comprises of a plurality of trays arranged vertically in a space apart manner in a pair of columns, mounted on a pair of frames keeping the two trays of a pair at a same level with the adjustable central gap forming a straight track for the arbours, an adjusting means such as rack and pinion, screw and nut or the like provided on the said frame for adjusting the central gap between the two columns of the trays, according to the size/gauge of the arbours, either manually by rotating a handle or by using an electric motor, or the like, the said trays forming tracks of the loading magazine being downwardly inclined towards the unfinished arbours conveyer unit magazine being downwardly inclined away from the finished arbour conveyer unit.
The invention providing the arbour grinding machine, in which the said unfinished arbour conveyer unit or the said finished arbour conveyor unit comprises of a plurality of jaws mounted on a chain, the said chain mounted movably on a pair of chain wheels with bearing blocks, the said chain wheel with bearing blocks mounted on a pair of columns, one column being fixed and the other being adjustable, according to the gauge of the rubber cot arbours by an adjusting means such as rack and pinion, screw and nut or the like, either manually or by using a prime mover such as an electric motor or a hydraulic or pneumatic device, the said columns preferably supported on another pair of strong columns fixed on a main frame, a spline shaft with bearing provided on the said columns for driving the said chain wheels with the help of prime mover like electric motor through drive mechanism, each of the said jaws are provided with an inclined slots the two arbour conveyer units for unfinished and finished arbours being rotated in the direction opposite to each other and the slot in the jaws of the two units being inclined in the opposite direction to each other.
The invention providing the arbour grinding machine, in which the said rubber cot diameter measuring unit comprises of a box, an arbour resting jaw having a pair of guide rods with linear bearing and a hydraulic or pneumatic cylinder provided in the said box for pushing the arbours towards a cot diameter measuring device(s) provided on the said box, the said measuring device selected from a contact type electronic dial gauge or an electronic probe or non contact type digital imaging system or ultra sonic or laser type measuring device giving a digital or analog out put on a LC. display, the said jaw being provided with a centrally divided bridge track unit with adjusting means such as rack and pinion, screw and nut or the like for adjusting the central gap according to the size/gauge of the arbours, either manually or by using an electronic motor or any other prime mover and a rejection tray provided for collecting the rejected arbours not suitable for grinding.
The invention providing the arbour grinding machine, in which the said cot diameter, measuring unit is provided on the carriage ahead of the grinding head unit to receive the unfinished arbours, one by one, from the unfinished arbour conveyer unit for measuring the cot diameter of unfinished arbours for removing the unsuitable arbours by rejecting and collecting in the rejection tray and loading only the suitable unfinished arbours on the loading -unloading carriage to be taken for grinding.
The invention providing the arbour grinding machine, in which the cot diameter measuring unit is provided in between unfinished arbour conveyer unit & arbour loading- unloading carriage, before the grinding head unit, to measure the cot diameters of finished arbours and removing the unsuitable arbours and collecting them into the rejection tray and allowing only the suitable arbours to be conveyed by the finished arbour conveyer unit, into unloading magazine.
The invention providing the arbour grinding machine, in which the said loading - unloading carriage comprises of a plate mounted on a linear slide, driven by an electric motor or by a pneumatic or hydraulic means or the like, a bridge track unit assembly provided at each end of the said plate, a stopper provided on each bridge track, unit the said stopper being a pneumatic or hydraulic or a mechanical stopper, a central space adjusting means such as rack and pinion screw and nut, or like provided on each bridge track unit for adjusting the central space according to the size/ gauge of the arbours, the said adjusting means being operated either manually or by any prime mover like electric motor, the said bridge track assembly units provided on two ends of the plate, on two opposite sides of the arbour holder unit, one assembly conveys the unfinished arbour to the arbour holder unit and the other assembly simultaneously conveys the finished arbour to the conveyer unit.
The invention providing the arbour grinding machine, in which the said centre less rubber cot arbour holding and guiding device comprises of a box, a T- bracket, guided on a needle or ball bearing housings, coupled with a rotary device such as a pneumatic rotary device or a electro mechanical device or the like mounted on the said box, a fixed shaft fitted on the said T- bracket, an arbour clamp fixed on the said fixed shaft for holding an arbour for grinding, a resting support and an ejector fitted with pneumatic / hydraulic cylinder provided on the said box, for pushing the finished rubber cot arbour after grinding, on the carriage , a guiding device provided on the said box, the said guiding device consists of a knurled shaft and a rubber dust cleaning brush provided adjacent to the parallel to the said knurled shaft, the said guiding device guided on a needle, or ball bearing pedestals and driven by a prime mover, such as A.C. or D. C. geared motor, in clock wise and/ or anticlock wise direction.
The invention providing the arbour grinding machine in which a suction device is provided on the said box for sucking out the rubber dust created during grinding/buffing operation of the rubber cots of the arbours.
The invention providing the arbour grinding machine in which the said grinding wheel head unit comprises of three parts viz:upper, middle and lower, an emery stone wheel fixed on a sleeve fitted on a shaft guided at both ends in ball or roller bearing housings and rotated by a prime mover such as A.C. or D. C. motor or like to rotate the said wheel in clockwise or anticlockwise direction and the said emery stone wheel assembly fitted on a body with a cap, forming the said upper part, a body fitted with male female rails equipped with needle cages and a geared motor or the like prime mover provided with eccentric bearing for giving reciprocating movement in Y-axis to the said emery stone wheel assembly of the upper part, forming the said middle part, a fixed body provided with a precision ball screw and nut assembly guided in bearing housing and coupled to an A. C OR D. C. servo motor or stepper motor, preferably through a flexible coupling, forming the said lower part, to give a traverse movement in the X-axis, providing forward and backward motion to the said middle part along with the upper part.
The invention providing the arbour grinding machine in which the said needle cages are preferably made of brass or plastic.
The invention providing the arbour grinding machine in which the plastic cages are molded in a single element assembled by dove tail snap joints at the ends.
The invention providing the arbour grinding machine in the which the said grinding wheel head unit is set to grind the rubber cots of the arbours as per fix diameter or as per fix cut , according to the requirement, which is preprogrammed controlled by the central panel.
The invention providing the arbour grinding machine in which the said dressing tool unit for dressing the emery - stone wheel, at a predetermined interval, each time, after grinding a desired number of rubber cots of the arbours comprises of a base plate provided with a linear motion guide unit consisting of a pair of blocks and rails, a carriage fitted with a diamond dresser tool and a precession ball screw and nut assembly and an A.C. or D. C. electric geared motor or the like, prime mover provided for rotating the said screw in clock wise or anticlock wise direction.
The invention providing the arbour grinding machine in which the said control panel is an electronic control panel having a display screen for setting, controlling and displaying all the operational sequences as per desired program of the automatic arbour grinding machine.
The invention providing the arbour grinding machine, in which the said machine is having a body with doors and windows forming a completely closed machine during grinding operations, and a transparent window cover provided against the grinding wheel head unit for keeping the operation visible to the operator, from the outside.
The invention will become more clear from the following description with reference to accompanying drawings wherein -
Fig.l : Shows from view/elevation, without side covers of the automatic rubber cot arbour grinding/buffing machine, according to an embodiment of this invention.
Figs. 2 & 3 : Show top view/plan and side view, respectively, of the grinding machine shown in Fig.l. Figs. 4, 5 & 6 : Show front view, top view and side view, respectively, of the unfinished rubber cot arbour storage unit or system/loading magazine for storing unfinished arbours, i.e. before grinding/buffing of the rubber cots.
Figs. 7, 8 & 9 : Show front view, top view and side view, respectively, of the finished rubber cot arbour storage unit or system/unloading magazine for unloading and storing finished arbours i.e. after grinding/buffing the rubber cots.
Figs. 10 & 11 : Show front view and side view, respectively, of the unfinished rubber cot arbour conveyor unit or system.
Figs. 12 & 13 : Show front view and side view, respectively of the finished rubber cot arbour conveyor unit or system.
Figs. 14 & 15 : Show front view and side view, respectively, of the rubber cot diameter measuring unit or system.
Figs. 16, 17 & 18 : Show left side view, top view and right side view, respectively, of the rubber cot arbour loading/unloading carriage for loading rubber cot arbour and unloading finished rubber cot arbours.
Figs. 19 & 20 : Show top view and side view, respectively, of the centreless rubber cot arbour holding and guiding unit or system of the automatic rubber cot arbour grinding/buffing machine. Figs. 21, 22 & 23 : Show front view, top view and sectional plan of the grinding wheel head unit or system of the automatic rubber cot arbour, grinding /buffing machine.
Figs. 24 & 25 : Show front view and top view, respectively, of the diamond dressing tool unit or system of the automatic rubber cot arbour grinding/buffing machine.
Fig. 26 : Show perspective view of the automatic rubber cot arbour grinding/buffing machine with covers and electronic control panel.
Fig. 27 : Show front view, respectively, part of machine working sequence, loading rubber cot arbour from unfinished rubber cot arbour storage unit or system to reject tray by use of unfinished rubber cot arbour conveyor unit or system through rubber cot diameter measuring unit or system & rubber cot arbour loading/unloading carriage.
Fig. 28 : Show front view, respectively, part of machine working sequence, rubber cot arbour present on rubber cot arbour loading/unloading carriage which is coming from rubber cot diameter measuring unit.
Fig. 29 : Show front view, respectively, part of machine working sequence, centre less rubber cot arbour holding device rotating toward grinding wheel head unit or system, rubber cot arbour which is present on rubber cot arbour loading/unloading carriage is moving toward centre less rubber cot arbour holding and guiding unit or system. Fig. 30 : Show front view, respectively, part of the machine working sequence, centre less rubber cot arbour holding device rotating to rubber cot arbour loading/unloading carriage, rubber cot arbour eject from rubber cot arbour holding device, rubber cot arbour moving toward & stop on rubber cot arbour loading/unloading carriage & moving toward finished rubber cot arbour storage unit or system by use of finished rubber cot arbour conveyor unit or system.
Fig. 31 : Show top view, respectively, part of the machine working sequence, diamond dresser which is part of diamond dressing tool unit or system moving toward opposite of its initial position during dressing sequence.
Fig. 32 : Show front view, respectively, part of the machine working sequence, diamond dresser which is part of diamond dressing tool unit or system touch to grinding wheel surface during dressing sequence.
Referring to Figs. 1 to 31, the automatic rubber cot arbour grinding/buffing machine (1) according to an embodiment of this invention, comprises of an unfinished rubber cot arbour storage unit/system or loading magazine (2) for safely storing a large number of unfinished rubber cot arbours (3) while occupying minimum floor space; a finished rubber cot arbour storage unit/system or unloading magazine (4) for safely storing a large number of finished rubber cot arbours (5) while occupying minimum floor space, provided parallely and adjacent to the unfinished rubber cot arbours loading magazine (2) an unfinished rubber cot arbour conveyor unit/system (6) for conveying the unfinished rubber cot arbours (3) from loading magazine (2) to a measuring unit (7) one by one quickly, without consuming much time or wasting any time; a loading/unloading carriage (8) for loading the unfinished rubber cot arbour, preferably after measuring the diameter of rubber cot in the measuring unit (7) and when not rejected but found suitable for grinding and simultaneously in sequence unloading the finished rubber cot arbour (5) from arbour holder unit (9) to a rubber cot arbour holding and guiding after grinding, to unloading conveyor unit/system (10) for onward conveying to finished rubber cot arbours storage unit/unloading magazine (4), a grinding wheel head unit (11) movable along ΛX' axis and Υ' axis for grinding/buffing the rubber cot arbours as per presetting of fixed diameter or fixed cut; a diamond dressing tool unit (12) for dressing the grinding wheel/emery stone, after grinding a predetermined number of rubber cot arbours and a control panel (13) for controlling all the operational sequences smoothly as per desired program. The various units/systems mounted on a frame (14) and enclosed in a body (15) having suitable doors, windows and covers.
The unfinished rubber cot arbour storage. unit/loading magazine (2) shows in figs. 4, 5 & 6 provides safety against unfinished rubber cot arbour damage, while storing a large number of arbours say e.g. 500 numbers and occupying minimum floor space. The loading magazine (2) comprises a plurality of trays (16) arranged vertically in a spaced apart manner in a pair of columns i.e. two trays provided at the same level with the adjustable gap (17) in therebetween, forming straight track which is mounted on a pair of frames (18), preferably made of aluminum or mild steel. The pair of frames (18) are provided with adjusting means (19) such as rack and pinion or screw and nut for adjusting the central gap (17) between the two columns of the trays (16), either manually by rotating a handle (20) or with the help of motor (not shown).
The size of the arbours may vary according to the spinning mills and, hence by adjusting the central gap (17) different size arbours are accommodated in the storage units/magazines. A large number of arbours say 500 numbers are stored safely in the racks of loading magazine (2) there by occupying minimum floor space.
The unfinished arbours loading magazine (2) and the finished arbour unloading magazine (4) shown in Figs.7, 8 & 9 are similar in construction, the only difference being that the trays (16) of the loading magazine (2) are kept inclined downwards towards the conveyor system (6) while the trays (21) of the unloading magazine (4) are kept inclined downwards away from the conveyor system
(10).
The Unfinished rubber cot arbour conveyor unit/system (6), as shown in FIGS. 10 & 11 comprises a plurality of specially designed jaws (22), mounted on a chain (23) with specially designed pin, nut and washer (24), moving on a pair of chain wheels (25) with bearing blocks (26) and are driven by an A. C. or D. C. motor (27) or any other prime mover, through a drive mechanism (28). Electric motor is preferably a geared motor suitable to rotate the chain (23) in clockwise or anti-clockwise direction. The Jaws (22) with chain
(23) and chain wheels (25) are mounted on a pair of columns (29) preferably made of light metal such as aluminum, which are machined. One column (29) is fixed while the other is adjustable. The two columns (29) are mounted on two strong columns (30), preferably made of Steel, which includes spline shaft and bearing system (31).
The Steel columns (30) are fixed on the main frame (14) of the grinding machine. The adjustable aluminum column (29) with chain(23) and Jaws (22) is adjusted, according to the gauge/size of the rubber cot arbour(3) with the help of adjusting means (32), consisting of rack and pinion or screw and nut system, either manually with the help of a handle (33) or by electric motor (not shown).
The unfinished rubber cot arbours (3), from the loading magazine (2) are conveyed to a measuring unit (7) or to the carriage (8), one by one, very quickly and smoothly, with out wasting any time. The jaw (22) is having a slot (34), for accommodating therein the arbour axle. This slot (34) is inclined towards the measuring unit (7) or carriage (8) for easy sliding out of the arbour (3). The unfinished arbour conveyor system (6) and the finished arbour conveyor system (10), as shown in FIGS. 12 & 13, are similar in construction. The only difference being that the slot (34) in the jaws
(22) of the conveyor system (10) is inclined in opposite direction to the inclination of the slot (34) in jaws (22) of conveyor system (6). Further the two conveyors rotate in opposite direction.
The conveyor systems (10) picks the finished arbours (5) after grinding, from the carriage (8) one by one smoothly and unload them smoothly into the trays (16) of the finished arbour storage magazine (4), one by one without any damage and without wasting any time. The measuring unit/system (7) as shown in FIGS. 14 & 15 comprises a box (35), open at two sides and preferably made of metal by moulding, such as light weight moulded Aluminum. A rubber cot arbour resting jaw (36) having a pair of guide rods (37) with linear bearings (38) and a pneumatic/hydraulic cylinder (39) are provided in the box (35), for pushing the finished or unfinished rubber cot arbours, vertically or horizontally towards the cot diameter measuring device (40) provided at the top of the box (35). the measuring device (40) is selected from a contact type electronic dial gauge or electronic probe or non contact type digital imaging system or ultra sonic or laser type which gives a digital or analog out put on a L.C. display. As the rubber cot arbour for Ring Frame consist of two rubber cots at the two end of the steel axle, accordingly a pair of measuring devices (40) are provided at the top of the box (35). In order to accommodate different sizes of arbours, an adjustable centrally divided bridge track unit (41) with rack and pinion type of screw and nut type adjusting means (42), which is operated manually or by an electric motor, is provided along with the jaw (36).
The unfinished rubber cot arbours from the loading magazine (2) are picked up one by one by the jaws (22) of the conveyor unit (6) and are conveyed one by one to the measuring unit (7), in case the measuring unit is provided to measure the diameter of the unfinished rubber cot arbours (3). The unfinished arbour (3) rests of the jaw (36) of the measuring unit (7) and is pushed towards the measuring means (40) with the help of hydraulic/pneumatic cylinder (39). The pre-set range of rubber cot diameter, which is acceptable for grinding, is selected and pass on to the carriage (8) and the arbours which fall out of the range are rejected and delivered to a rejection tray(92). Thus, only the suitable arbours are further carried by the carriage (8) for grinding, thereby increasing the productivity.
The arbour loading/unloading carriage (8) as shown in FIGS.16,17 &
18 comprises a plate (43), preferably made of metal such as steel or aluminum, mounted on a linear slide (44) which is driven by an electric motor or a pneumatic/hydraulic means. The plate (43) of each end is provided with a bridge track unit assembling (45, 46) each having a stopper (47, 48) which is a pneumatic/hydraulic or mechanical stopper. In order to carry different size of arbours each of the assembly (45 & 46) is made adjustable for central space and provided with adjusting means (49 , 50) which can be a screw and nut type or Rack and pinion type adjusting means and can be operated manually or by an electric motor or the like. The assemblies (45 & 46) are provided on the two opposite sides of the arbours holder unit (9) or grinding wheel head unit (11). One assembly (45) is provided on measuring unit side to convey one by one unfinished rubber cot arbour (3) to the rubber cot arbour holder unit (9) when found suitable for grinding, or otherwise to the rejection tray (92), and the other is provided towards finished rubber cot arbour unloading magazine (4) for unloading the finished arbour (5), after grinding. The feeding of unfinished arbour (3) to arbour holder unit (9) and unloading of finished arbour (5) after grinding is carried out simultaneously in a smooth sequential operation, without wasting any time, resulting into higher productivity.
The centre less rubber cot arbour holding and guiding device (9) also termed as arbour holder unit (9), as shown in FIGS. 19 & 20 comprises a box (51) which is preferably a metal box made of moulded cast iron or fabricated steel box. A ΛT' - type bracket (52), guided on needle or ball bearing housings (53) is coupled by a coupling (54) with a rotary device (55) which can be a pneumatic rotary device or electro mechanical device. A fixed shaft (56) is fitted on the T-bracket (52) for fixing a rubber cot arbour clamp (57). A resting support (58) and an ejector (59) fitted with pneumatic/hydraulic cylinder are provided on the box (51) for pushing the finished rubber cot arbour (5), after grinding, on to the carriage (8). A guiding device is also provided on the box (51). The said guiding device consists of a knurled shaft (60) along with a rubber dust cleaning brush (61), guided on needle or ball bearing pedestals (62) and driven by preferably an A. C. or D. C. geared motor (63) in clockwise and/or anticlockwise direction. A suction device (64) is also provided for sucking out the rubber dust produced during grinding/buffing operation of the rubber cots. The arbour holder unit (9) is used to hold and guide the rubber cot arbour during grinding operation, precisely. It is ratable at its home position in grinding zone. All the rubber particles produced are extracted by the efficient suction of the suction device (64) provided with the arbour holder unit (9).
The grinding wheel head unit/system (11), as shown in FIGS. 21, 22 & 23 is made in three parts viz, an upper part, a middle part and a lower part. The upper part comprises of an emery stone wheel (65) fixed on a sleeve (66) is fitted on a steel shaft (67), by a check nut (68). The shaft (67) is guided at both ends in ball or roller bearing housings (69) and rotated by an A.C. or D. C. motor (70) to drive the wheel (65) clockwise or anticlockwise. The emery stone wheel assembly is fitted on a cast iron moulded body with cap (71). The middle part comprises of a cast iron moulded body (72) provided with male female rails (73) equipped with needle cages (74) preferably made of plastic or brass. The plastic cages are moulded in a single element which can be assembled by means of dove tail snap joints at the ends. A geared motor provided with eccentric bearing (75) for giving reciprocating movement to the upper part in Y-axis. The lower part comprises fixed body (76) provided with a precession ball screw nut assembly (77, 78), guided in bearing housing (79) to give a traverse movement in X - axis, to provide forward and reverse motion to the middle part along with the upper part with the help of an A. C. servo or stepper motor (80) coupled in line with ball screw (77) with the help of a flexible coupling (81).
For grinding the unfinished rubber cot arbour the grinding wheel head unit (11) provides X & Y axis motion to the middle part along with upper part including emery stone wheel and its motor, i.e. the forward and reverse motions in X- axis as well as reciprocating movement in Y - axis. With the provision of moving grinding wheel head unit in X axis & Y axis, the grinding operation of the rubber cot arbour is quite smooth and sequential. The grinding unit can be set to grind or buff the rubber cot as per fixed diameter or as fixed cut.
The emery stone grinding wheel dressing tool unit (12) as shown in FIGS. 24 & 25 comprises of a base plate (82), which is preferably a machined steel plate provided with a linear motion guide unit having a pair of blocks and rails (83 & 84). A carriage (85) fitted with diamond dresser tool (86) with the help of precision ball screw and nut assembly (87 &. 88). An A.C. or D. C. electric geared motor (89) is provided to rotate the ball screw clockwise and/or anticlockwise. The diamond dressing unit (12) is used for dressing the emery stone grinding wheel (65) at a regular predetermined set interval say after grinding every 1000 numbers of rubber cot arbours and it works automatically as per pre set program.
An electronic panel (13) is provided on the grinding machine, having a display screen (90) for setting and controlling all the operational sequences smoothly and displaying the same on the screen (90). The machine is completely closed before starting the grinding and after loading the magazine (2) with unfinished cot rubber arbours (3). The grinding operation is visible through a transparent window cover (91), which can be checked by the operator. After loading and starting the machine, operator is free to attend some other jobs and will be required to attend the machine for loading the unfinished arbours (3) in the loading magazine (2) and unloading the finished arbours (5) from the unloading magazine (4).

Claims

1. An automatic rubber cot arbour grinding/buffing machine comprising an unfinished arbour storage unit/loading machine for safe storing of a large number of unfinished arbour in minimum floor space, an unfinished arbour conveyer unit provided adjacent to the said loading magazine for taking the arbour from the said loading magazine and smooth conveying to a measuring unit or a carriage one by one, a rubber cot diameter measuring unit, provided adjacent to the said unfinished arbour conveyer unit, for measuring the cot diameter one by one and comparing with the predetermined set diameter, as preprogrammed for rejecting of the arbours, not suitable for grinding in the rejection tray, a loading -unloading carriage provided adjacent to the said measuring unit, for loading unfinished arbours to an arbour holder unit for grinding and simultaneously unloading finished arbour after grinding into a finished arbour conveyer unit, a center less rubber cot arbour holding and guiding the device provided substantially perpendicularly to the said arbour loading-unloading carriage, for one by one holding and precisely guiding the unfinished arbour for grinding and pushing out the finished arbour after grinding, on to the said carriage for unloading, a grinding wheel head unit, provided adjacent to the said arbour holder unit, movable along X-axis and Y- axis for grinding/buffing the rubber cot arbours as per presetting of fix diameter or fix cut, a dressing tool unit, provided adjacent to the said grinding wheel head unit, for dressing the grinding wheel after grinding a predetermined number of arbours, a finished arbour conveyer unit, provided adjacent to the said carriage on its unloading end for smoothly conveying the finished arbour one by one to a finished arbour storage unit /unloading magazine provided adjacent to the finished arbour conveyer unit and adjacent and parallel to the said unfinished arbour storage unit/loading magazine. A control panel for controlling all the operations of arbour grinding machine in a sequence as per desired program, all the units being mounted on a main frame and enclosed in a body having suitable doors, windows and covers.
2. The arbour grinding machine according to claim-1, in which the said
\ loading magazine or the said unloading magazine comprises of a plurality of trays arranged vertically in a spaced apart manner in a pair of columns, mounted on a pair of frames keeping the two trays of a pair at the same level with an adjustable central gap forming a straight track for the arbours, an adjusting means such as racks and pinion, screw and nut or the like provided on the said frame for adjusting the central gap between the two columns of the trays, according to size/gauge of the arbours, either manually by rotating a handle or by using an electric motor or the like, the said trays forming tracks of the loading magazine being downwardly inclined towards the unfinished arbours conveyer unit and the trays of the said unloading magazine being downwardly inclined away from the finished arbour conveyor unit.
3. The arbour grinding machine according to claim-1, in which the said unfinished arbour conveyer unit or the said finished arbour conveyer unit comprises of a plurality of jaws mounted on a chain, the said chain mounted movably on a pair of chain wheels with bearing blocks, the said chain wheel with bearing blocks mounted on a pair of columns, one column being fixed and the other being adjustable, according to the gauge of the rubber cot arbour by an adjusting means such as rack and pinion, screw and nut, or the like, either manually or by using a prime mover such as an electric motor or a hydraulic or pneumatic device, the said columns preferably supported on another pair of strong columns fixed on the main frame, a spline shaft with bearing provided on the said columns for driving the said chain wheels with the help of a prime mover like electric motor through drive mechanism, each of the said jaws are provided with an inclined slot, the two arbour conveyor units for unfinished and finished arbours being rotated in the direction opposite to each other and the slots in the jaws of the two units being inclined in the opposite direction to each other.
4. The arbour grinding machine according to claim-1, in which the said rubber cot diameter measuring unit is in between unfinished arbour conveyer unit & arbour loading- unloading carriage comprises of a box, an arbour resting jaw having a pair of guide rods with linear bearings and a pneumatic or hydraulic cylinder provided in the said box for pushing the arbours towards a cot diameter measuring device(s) provided on the said box, the said measuring device selected from a contact type electronic dial gauge or an electronic probe or non contact type digital imaging system or ultra sonic or laser type measuring device giving a digital or analog output on a LCD display via C. P. U (Central processing unit), the said jaw being provided with a centrally divided bridge track unit with adjusting means such as rack and pinion screw and nut or the like for adjusting the central gap according to the size/gauge of the arbours, either manually or by using an electric motor or any other prime mover and a rejection tray provided for the collecting and rejection arbour not suitable for grinding.
5. The arbour grinding machine according to claim-1 or 5, in which the said cot diameter measuring unit is provided in between unfinished arbour conveyer unit & arbour loading- unloading carriage ahead of the grinding head unit to receive the unfinished arbours, one by one, from the unfinished arbour conveyer unit for measuring the cot diameter of unfinished arbours and removing the unsuitable arbours by rejection and collecting in the rejection tray and loading only the suitable unfinished arbours on the loading -unloading carriage to be taken for grinding.
6. The arbour grinding machine according to claim-1 or 5, in which the cot diameter measuring unit is provided in between unfinished arbour conveyer unit & arbour loading- unloading carriage, after the grinding head unit, to measure the cot diameter of finished arbours and removing the unsuitable arbours and collecting them into the rejection tray and allowing only the suitable arbours to be conveyed by the finished arbour conveyer unit, into the loading magazine.
7. The arbour grinding machine according to claim-1, in which the said loading -unloading carriage comprises of a plate mounted on a linear slide, driven by an electric motor or by a pneumatic or hydraulic means or the like, a bridge track unit assembly provided at each end of the said plate, a stopper provided on each bridge track unit, the said stopper being a pneumatic, hydraulic or a mechanical stopper, a central space adjusting means such as rack and pinion, screw and nut or the like provided on each bridge track unit for adjusting the central space according to the size/gauge of the arbours, the said adjusting means being operated either manually or a prime mover like electric motor, the said bridge track assembly units provided on two ends of the plate, on two opposite sides of the arbour holder unit, one assembly conveys the unfinished arbour to the arbour holder unit and the other assembly simultaneously conveys the finished arbour to the conveyer unit.
8. The arbour grinding machine according to claim-1, in which the said center less rubber cot arbour holding and guiding ice comprises of a box, a T-bracket, guided on needle or ball housings, coupled with a rotary device such as a pneumatic rotary device or elector mechanical device or the like mounted on the said box, a fixed shaft fitted- on the said T-bracket , an arbour clamp fixed on the said fixed shaft for holding an arbour for grinding, a resting support and an ejector fitted with pneumatic /hydraulic cylinder provided on the said box, for pushing the finished rubber cot arbour after grinding , on to the carriage a guiding device provided on the said box, the said guiding device consists of a knurled shaft and a rubber dust cleaning brush provided adjacent to the parallel to the said knurled shaft, the said guiding device guided on needle or ball bearing pedestals and driven by a prime mover, such as an A. C. or D. C. geared motor, in clock wise or anti clock wise direction.
9. The arbour grinding machine according to claim-1 or 8, in which a suction device is provided on the said box for sucking out the rubber dust created during grinding/buffing operation of the rubber cots of the arbours.
10. The arbour grinding machine according to claim-1, in which the said 5 grinding wheel head unit comprises of three parts viz: upper, middle, lower, an emery stone wheel fixed on a sleeve fitted on a shaft guided at both ends in ball or roller bearing housings and rotated by a prime mover such as an A. C. or D. C. motor or the like, to rotate the said wheel in clock wise or anti clock wise direction and
10 the said emery stone wheel assembly fitted on a body with cap, forming the said upper part, a body fitted with male female rails equipped with needle cages and a geared motor or the like prime mover provided with eccentric bearing forming the said middle part, for giving reciprocating movement in Y-axis to the said emery stone
15 wheel assembly of the upper part, a fixed body provided with the precision ball screw and nut assembly guided in bearing housing and occupied to the A. C. server motor, preferably through a flexible coupling, forming the said lower part, to give a transverse movement in X-axis providing forward and backward motion to the
20 said middle part along with the upper part.
11. The arbour grinding machine according to claim-10 in which the said needle cages are preferably made of brass or plastic.
25 12. The arbour grinding machine according to claim-11, in which the plastic cages are molded in a single element assembled by dove tail snap joints at the ends.
13. The arbour grinding machine according to claim-10, in which the 30 said grinding wheel head unit is set to grind the rubber cots of the arbours as per fix diameter or as per fix cut, according to the requirement, which is preprogrammed, controlled by the central panel.
5 14. The arbour grinding machine according to claim-1, in which the said dressing tool unit for dressing the emery stone wheel, at the predetermined interval, each time, after grinding a desired number of rubber cots of the arbours comprises of a base plate provided with a leaner motion guide unit consisting of a pair of blocks and 10 rails, a carriage fitted with diamond dresser tool and a precision ball screw and nut assembly and an A. C. or D. C. electric geared motor or the like prime mover, provided for rotating the said screw in clock wise or anti clock wise direction.
15 15. The arbour grinding machine according to claim-1, in which the said control panel is an electronic control panel having a display screen, for setting, controlling and displaying all the operational sequence as per desired program of the automatic grinding machine.
20 16. The arbour grinding machine according to claim-1, in which the said machine is having a body with doors and windows forming a completely closed machine during grinding operations, and a transparent window cover provided against the grinding wheel head unit for keeping the grinding operations visible to the operator, from
25 the outside.
17. An automatic rubber cot arbour grinding/buffing machine substantially as herein described and illustrated in Figures 1 to 26 of the accompanying drawings.
PCT/IN2007/000045 2006-10-12 2007-02-02 Automatic grinding/buffing machine for rubber cot arbors WO2008044240A1 (en)

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IN1682MU2006 2006-10-12
IN1682/MUM/2006 2006-10-12

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WO2008059527A2 (en) * 2006-10-12 2008-05-22 Jitendra Ishwarbhai Mevada Conveyer system for conveying unfinished or finished rubber cot arbour and an automatic rubber cot arbour grinding or buffing machine comprising the same
WO2008062464A2 (en) * 2006-10-12 2008-05-29 Jitendra Ishwarbhai Mevada Rotary type storage unit or magazine for unfinished or finished rubber cot arbour loading or unloading system, and an automatic rubber cot grinding or buffing machine comprising the same
WO2008062442A2 (en) * 2006-10-12 2008-05-29 Jitendra Ishwarbhai Mevada Centre less rubber cot arbour holding & guiding device
WO2008062462A2 (en) * 2006-10-12 2008-05-29 Jitendra Ishwarbhai Mevada Carriage system for carrying unfinished or finished rubber cot arbour and an automatic rubber cot arbour grinding or buffing machine comprising the same
EP2239355A1 (en) * 2009-04-07 2010-10-13 ATAC Insaat ve Sanayi A.S. - ANTEKS Dokuma Fabrikasi Preparation machine for rectification of a textile machine's rollers
CN102973226A (en) * 2012-11-22 2013-03-20 李红龙 51 singlechip-based fully-automatic machine for brushing cups
US20140219767A1 (en) * 2011-09-22 2014-08-07 Plus Seiki Co., Ltd. Device for changing pitch of stack
WO2016207917A3 (en) * 2015-06-25 2017-02-09 Jitendra Ishwarbhai Mevada "a storage and handling assembly for rubber cot arbours during loading and unloading operation in an automotive rubber cot grinding or buffing machine"
CN107717649A (en) * 2017-11-21 2018-02-23 无锡通力霍普纺织机械有限公司 Clamp member
WO2019209209A3 (en) * 2017-12-19 2020-01-16 Asteks Kauçuk Ve Plasti̇k Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Cot grinding machine
WO2020234891A1 (en) * 2019-05-20 2020-11-26 Jitendra Ishwarbhai Mevada An improved loading system for rubber cot arbours in a rubber cot grinding or buffing machine
CN112008530A (en) * 2020-09-07 2020-12-01 李岑丽 Surface treatment method for formed rubber sealing strip
CN113638323A (en) * 2021-08-23 2021-11-12 安徽昌达路桥工程集团有限公司 Reinforced concrete plane turning arch bridge concrete grinding core construction method

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Cited By (18)

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Publication number Priority date Publication date Assignee Title
WO2008059527A2 (en) * 2006-10-12 2008-05-22 Jitendra Ishwarbhai Mevada Conveyer system for conveying unfinished or finished rubber cot arbour and an automatic rubber cot arbour grinding or buffing machine comprising the same
WO2008062464A2 (en) * 2006-10-12 2008-05-29 Jitendra Ishwarbhai Mevada Rotary type storage unit or magazine for unfinished or finished rubber cot arbour loading or unloading system, and an automatic rubber cot grinding or buffing machine comprising the same
WO2008062442A2 (en) * 2006-10-12 2008-05-29 Jitendra Ishwarbhai Mevada Centre less rubber cot arbour holding & guiding device
WO2008062462A2 (en) * 2006-10-12 2008-05-29 Jitendra Ishwarbhai Mevada Carriage system for carrying unfinished or finished rubber cot arbour and an automatic rubber cot arbour grinding or buffing machine comprising the same
WO2008062442A3 (en) * 2006-10-12 2008-07-17 Jitendra Ishwarbhai Mevada Centre less rubber cot arbour holding & guiding device
WO2008059527A3 (en) * 2006-10-12 2008-07-24 Jitendra Ishwarbhai Mevada Conveyer system for conveying unfinished or finished rubber cot arbour and an automatic rubber cot arbour grinding or buffing machine comprising the same
WO2008062462A3 (en) * 2006-10-12 2008-07-31 Jitendra Ishwarbhai Mevada Carriage system for carrying unfinished or finished rubber cot arbour and an automatic rubber cot arbour grinding or buffing machine comprising the same
WO2008062464A3 (en) * 2006-10-12 2008-07-31 Jitendra Ishwarbhai Mevada Rotary type storage unit or magazine for unfinished or finished rubber cot arbour loading or unloading system, and an automatic rubber cot grinding or buffing machine comprising the same
EP2239355A1 (en) * 2009-04-07 2010-10-13 ATAC Insaat ve Sanayi A.S. - ANTEKS Dokuma Fabrikasi Preparation machine for rectification of a textile machine's rollers
WO2010115938A1 (en) * 2009-04-07 2010-10-14 ATAÇ Insaat ve Sanayi A.S. - ANTEKS Dokuma Fabrikasi Preparation machine for rectification of a textile machine's rollers
US20140219767A1 (en) * 2011-09-22 2014-08-07 Plus Seiki Co., Ltd. Device for changing pitch of stack
CN102973226A (en) * 2012-11-22 2013-03-20 李红龙 51 singlechip-based fully-automatic machine for brushing cups
WO2016207917A3 (en) * 2015-06-25 2017-02-09 Jitendra Ishwarbhai Mevada "a storage and handling assembly for rubber cot arbours during loading and unloading operation in an automotive rubber cot grinding or buffing machine"
CN107717649A (en) * 2017-11-21 2018-02-23 无锡通力霍普纺织机械有限公司 Clamp member
WO2019209209A3 (en) * 2017-12-19 2020-01-16 Asteks Kauçuk Ve Plasti̇k Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Cot grinding machine
WO2020234891A1 (en) * 2019-05-20 2020-11-26 Jitendra Ishwarbhai Mevada An improved loading system for rubber cot arbours in a rubber cot grinding or buffing machine
CN112008530A (en) * 2020-09-07 2020-12-01 李岑丽 Surface treatment method for formed rubber sealing strip
CN113638323A (en) * 2021-08-23 2021-11-12 安徽昌达路桥工程集团有限公司 Reinforced concrete plane turning arch bridge concrete grinding core construction method

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