EP2655011B1 - Perfected grinding machine and grinding method - Google Patents
Perfected grinding machine and grinding method Download PDFInfo
- Publication number
- EP2655011B1 EP2655011B1 EP11804957.6A EP11804957A EP2655011B1 EP 2655011 B1 EP2655011 B1 EP 2655011B1 EP 11804957 A EP11804957 A EP 11804957A EP 2655011 B1 EP2655011 B1 EP 2655011B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- machine
- cylinder
- lunettes
- piece
- holder head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 11
- 230000008878 coupling Effects 0.000 claims description 16
- 238000010168 coupling process Methods 0.000 claims description 16
- 238000005859 coupling reaction Methods 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Images
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
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
-
- 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
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/061—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically
- B24B41/062—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically between centres; Dogs
-
- 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
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/065—Steady rests
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/067—Work supports, e.g. adjustable steadies radially supporting workpieces
-
- 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
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
Definitions
- the present invention relates to a perfected grinding machine for operative cylinders and a method for the grinding of said cylinders.
- operative cylinders refers, for example, to cylinders of rolling mills for the rolling of metals, those used in paper-mills, those used in oil-pressure applications, shafts of marine motors and in general all cylinders made of metallic and non-metallic materials which are of industrial interest.
- the latter in fact, have dimensions varying from 40 mm to 2,300 mm in diameter, 1,000 mm to 12,000 mm in length and weights ranging from a few tens of daN up to 230-250 t.
- the grinding machines which can be used for these cylinders therefore have specific characteristics and must not be confused with the smaller and traditional lathes or similar machines which, in this sense, are not capable of effecting these grinding processes.
- Known grinding machines normally comprise a piece-holder head, generally fixed, whose function is to entrain the piece being processed in rotation and, in some applications, support it, and a movable tailstock centre which can be moved axially with respect to the piece-holder head and whose function is to provide an axial reference with respect to the cylinder and, in some applications, also support it.
- the grinding of a cylinder must always be preceded by a preliminary positioning phase of the latter on the machine, which is effected by inserting the cylinder to be ground between the piece-holder head and the tailstock centre and subsequently supporting it between centres of the machine associated with the head and tailstock centre; furthermore, if necessary, said support of the cylinder is tightened with contrast devices, also called lunettes, which, in some cases, can completely sustain the weight of the cylinder, thus eliminating the supporting function of the head and tailstock centre.
- contrast devices also called lunettes
- the known art generally envisages that before loading the cylinder, the lunettes be positioned along the base of the machine in order to house the cylinder to be ground.
- the lunettes can be various types of lunettes: those suitable for opposing the grinding forces in the case of cylinders supported on the tips, or suitable for supporting the weight of the cylinder in all other cases.
- the tailstock centre must be positioned, also in this case in relation to the dimensions of the cylinder. All of these activities and generally all activities aimed at adapting a grinding machine for housing a certain cylinder are defined as the set-up of the machine.
- the correct positioning of the cylinder on the grinding machine therefore envisages that the tailstock centre and lunettes or contrast devices be positioned in relation to the length of the cylinder at variable distances from the piece-holder head, which is fixed, by moving them in an axial direction either towards or away from the latter, depending on the length of the cylinder.
- Both the tailstock centre and the lunettes or contrast devices are usually moved and regulated in position individually, regardless of whether these set-up operations are manual or automatic.
- the manual solution is economical, on the other, it requires time and accuracy on the part of the operator, whereas although the automatic solution guarantees operational velocity and precision, it requires a movement and control mechanism for the tailstock centre and for each of the lunettes.
- the general objective of the present invention is consequently to overcome these and other drawbacks of the known art.
- a grinding machine for operative cylinders which comprises a piece-holder head and a tailstock centre provided with centres for the movement and, in some cases, support of a cylinder being processed, wherein the machine comprises movement means associated with both the piece-holder head and the tailstock centre and possibly lunettes for allowing them to move along a common movement direction.
- a grinding machine according to the preamble of claim 1 is disclosed in JP 2005-262342
- both the piece-holder head and the tailstock centre and possibly the lunettes are each associated with a single endless screw equipped with two portions having a discordant helicoidal threading, so that they can be moved simply, accurately and rapidly.
- this shows a grinding machine according to the present invention.
- the grinding machine 10 comprises a base 11 on which a piece-holder head 13 and tailstock centre 12 are trans-latingly assembled, which serve to move and possibly support a cylinder 14 which is positioned between them during the grinding operation.
- the machine 10 represented is of the type in which the cylinder being processed is supported by two rotating centres 81 and 83, positioned in the piece-holder head 13 and tailstock centre 12, whereas the lunettes 20, 21, 22 are positioned in contact with the cylinder and have the function of providing a contrast to the possible bending of the cylinder caused by the same processing.
- the machine 10 can equivalently be of a different type, in which the lunettes, in addition to having the function described above, also have the function of supporting the whole weight of the cylinder being processed, whereas the piece-holder head and tailstock centre only have the function of bringing it into rotation, to allow its grinding on the part of a grinding wheel or equivalent tool, or said lunettes can be completely absent, as in the case of grinding between the centres of squat cylinders, etc.
- the piece-holder head 13 preferably comprises a single body which, in accordance with the disclosures of the present invention, is capable of translating on two linear guides 80 with which it is coupled by means of suitable sliding blocks.
- the rotating centre 81 which, in some cases, forms a support for the cylinder 14, can be housed inside the body of the piece-holder head 13.
- a motor 71 can be possibly positioned in the rear part, with the relative transmission, for actuating the rotation of the cylinder 14.
- the tailstock centre 12 also comprises a body which is capable of translating thanks to the presence of two linear guides 80 situated in the lower part of the structure with which it is coupled by means of suitable sliding blocks.
- the movable centre 83 which, in some cases, represents the second support for the cylinder, can be housed inside the body of the tailstock centre 12.
- the tailstock centre 12 can have a device in the lower part, which allows a preloading to be generated through a spring device: this preloading acts in an axial direction and guarantees the continuous contact between the cylinder 14 and two movable centres 81 and 83.
- the machine 10 can also comprise contrast or supporting lunettes 20, 21, 22.
- the set of lunettes always comprises a central lunette 20 or, more generally, the central lunette 20 and two side lunettes 21 and 22, or four side lunettes etc.
- the machine 10 also comprises a grinding wheel which can be moved parallelly to the axis of the cylinder, not shown for the sake of concision, and in any case known in itself in this type of grinding machine.
- Both the piece-holder head 13, and tailstock centre 12 and also the lunettes 20, 21 and 22 can be moved linearly along the base 11 by means of sliding blocks on the linear guides 80 so that they can move towards or away from each other, to house and support cylinders having different lengths.
- the grinding machine 10 comprises movement means associated with both the piece-holder head, the tailstock centre and also the lunettes or contrast devices, to allow them to move along a common movement direction.
- the movement means comprise a endless screw 16 coupled with both the piece-holder head 13, the tailstock centre 12, and lunettes 20, 21 and 22 so that, when brought into rotation, the screw 16 actuates both the approach or withdrawal in the same direction along which the screw 16 extends.
- the latter produced in a single piece, has two threaded portions 160 and 161 with which a corresponding sleeve of the piece-holder head 13, tailstock centre 12 and each of the lunettes 20, 21 and 22, is engaged, which will be described in further detail hereunder.
- the latter is provided with two threaded portions 160, 161 which have discordant have helicoidal threadings, for example an anticlockwise threading and a clockwise threading, preferably having the same pitch.
- the screw 16 is actuated in rotation by a motor 17, for example an electric brushless motor or the like.
- the movement means also comprise coupling/decoupling means of the piece-holder head 13, tailstock centre 12 and lunettes 20, 21 and 22, to the threaded sleeves engaged on the screw 16.
- the cylinder in spite of its dimensions, can be easily positioned as, once it has been arranged on the machine in the correct position, the head and tailstock centre are moved until they are correctly positioned, resting at the ends of the cylinder to be processed.
- This particular feature also significantly facilitates the projecting of mechanisms of a possible automatic loading system, as a correct coupling of the head 13 with the cylinder can also be obtained with a simple two-axis loading device (as the head can be moved).
- the selection mechanism of the parts to be moved envisages, for each of these, a sleeve 90 which comprises a cylindrical mantle and is engaged on the endless screw 16 by means of a threading inside the mantle itself.
- Each sleeve 90 can also be connected to the unit to be moved by means of a suitable mechanism.
- the blocking means of the unit to be moved can comprise electromagnets, mechanical coupling means such as fixing pegs, wedges, removable interference profiles or other similar items.
- the coupling/decoupling means of the sleeve to the part to be positioned comprise two arms 91, 92 pivoted to the structure of the part to be moved (piece-holder head, tailstock centre and lunette) and each provided with an engagement end 93, 94 with said sleeve 90 and an opposite free end 95, 96 coupled with an actuator 97.
- the actuator 97 is preferably a linear actuator, for example a gas, pneumatic, hydraulic, electric actuator or similar: in the non-limited embodiment illustrated, it is a hydraulic actuator equipped with a cylinder and piston which protrudes variably from the cylinder.
- the actuator 97 is coupled, preferably hinged, to the free ends 95, 96 of the arms 91, 92; each engagement end 93, 94 of each arm 91, 92 is equipped with a clamp with linings for coupling with the outer cylindrical surface of the sleeve 90.
- the two arms 91, 92 have their fulcrum along their body in the points O' and O" so as to oscillate, so that as the two free ends 95, 96 approach, the opposite ends 93, 94 move away and vice versa.
- the machine 10 preferably comprises a single screw 16 and both the head 13 and the tailstock centre 12 and lunettes 20, 21, 22 are equipped with these coupling/decoupling means, each having a specific corresponding sleeve.
- both the lunette and the head and tailstock centre can be activated contemporaneously or separately with a single command, obtaining an extremely high versatility of the machine.
- the movement means for the head 13 and for the tailstock centre 12 and/or for the lunettes can be produced differently, for example by means of a transmission belt coupled with trolleys, so as to enable the movement of the head 13 and tailstock centre 12 and/or lunettes, as envisaged above.
- the movement means can equivalently comprise two separate screws and two motors, even if, in this case, the cost of the machine is higher.
- a grinding machine 10 as described above can also advantageously be useful for implementing a new positioning method of an operative cylinder.
- the fact that the piece-holder head is fixed implies a positioning of the cylinder on the machine, which is effected considering the piece-holder head itself as reference, with respect to which all the relevant sizes are measured and the positioning of the cylinder is effected, with negative consequences for both the set-up time of the machine and also for the loading means which must be used in combination with the latter.
- Another drawback linked with the known art relates to the fact that, during the loading, the cylinder must be moved in three directions and in particular, among these, also along the longitudinal axis, so as to be correctly positioned on the grinding machine; these regulation movements require the use of a loading device.
- this device In manual plants, this device is typically a gantry crane or a jib crane and the precision with which the cylinder must be moved and positioned requires long positioning times, skilled operators and the risk that, with an erroneous manoeuvre, the cylinder, or machine, or both, can be damaged.
- the movement of the cylinders is effected with 3-axis loading systems which if, on the one hand, they reduce the manoeuvring times and increase the safety of the same, on the other, they require machines which move the load along 3 axes and are consequently, by nature, complex, costly and require maintenance.
- a positioning method can be easily effected, which should also be considered an object of the present invention, which comprises the method of claim 8.
- this is preferably fixed onto the machine and coincides with a lunette or contrast device, in particular with the central lunette; this lunette can obviously be removed to allow the grinding of cylinders having a particular form and geometry.
- Both the piece-holder head and tailstock centre can preferably be moved so as to be always equidistant from the reference point: their movement, in other words, is of the same entity and is always effected in the same direction but in opposite senses.
- side lunettes i.e. those situated at the sides of the central lunette which coincides with the reference point, these can be advantageously moved to the same degree and in the same direction, but in opposite senses. There can be one or more of these side lunettes but always in the same quantity on both sides with respect to the central lunette.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI2010A002349A IT1403603B1 (it) | 2010-12-22 | 2010-12-22 | Macchina rettificatrice perfezionata e metodo di rettifica |
PCT/EP2011/006373 WO2012084159A1 (en) | 2010-12-22 | 2011-12-13 | Perfected grinding machine and grinding method |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2655011A1 EP2655011A1 (en) | 2013-10-30 |
EP2655011B1 true EP2655011B1 (en) | 2014-07-30 |
Family
ID=43737003
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11804957.6A Active EP2655011B1 (en) | 2010-12-22 | 2011-12-13 | Perfected grinding machine and grinding method |
Country Status (9)
Country | Link |
---|---|
US (1) | US20130309945A1 (ja) |
EP (1) | EP2655011B1 (ja) |
JP (1) | JP2014501180A (ja) |
KR (1) | KR20140045306A (ja) |
CN (1) | CN103354773A (ja) |
CA (1) | CA2821810A1 (ja) |
IT (1) | IT1403603B1 (ja) |
RU (1) | RU2013128362A (ja) |
WO (1) | WO2012084159A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108311965A (zh) * | 2018-02-11 | 2018-07-24 | 诸暨市基麦罗进出口有限公司 | 一种铜铝复合管材新工艺设备 |
CN108356618A (zh) * | 2018-03-29 | 2018-08-03 | 浙江中硅新材料有限公司 | 一种高强度陶瓷辊用磨修设备 |
CN110014334B (zh) * | 2019-05-24 | 2024-04-12 | 湖南创新机电技术开发有限公司 | 滚子连续磨削装置 |
CN112497009A (zh) * | 2020-11-30 | 2021-03-16 | 青岛凯诚绿色建筑有限公司 | 建筑工地用无缝钢管智能除锈养护设备 |
CN117900997B (zh) * | 2024-03-15 | 2024-06-18 | 山东硅瓷新材料有限公司 | 一种碳化硅制品磨削夹持工装 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB142977A (en) * | 1919-03-24 | 1920-05-20 | Richard Farren | Improvements in the construction of cutlery grinding machines |
US2185560A (en) * | 1938-11-02 | 1940-01-02 | Norton Co | Indexing attachment for grinding machines |
US2809472A (en) * | 1955-11-25 | 1957-10-15 | Landis Tool Co | Interlocking work drive and clamping mechanism |
US3664066A (en) * | 1971-01-25 | 1972-05-23 | Ingersoll Milling Machine Co | Method and apparatus for aligning workpieces |
FR2409131A1 (fr) * | 1977-11-22 | 1979-06-15 | Clichy Const Sa | Perfectionnement aux tables porte-pieces de machines a rectifier |
DE3734734A1 (de) * | 1987-10-14 | 1989-04-27 | Fortuna Werke Maschf Ag | Nachlaufsetzstock fuer schleifmaschinen |
US5520570A (en) * | 1993-07-30 | 1996-05-28 | Litton Industrial Automation Systems Inc. | Workpiece radial locator device and method |
GB2283192B (en) * | 1993-10-20 | 1997-07-16 | Western Atlas Uk Ltd | Improvements in and relating to grinding machines |
US6149503A (en) * | 1995-06-23 | 2000-11-21 | Unova Uk Limited | Method and apparatus for supporting a crankshaft in a grinding machine for grinding the crankpins of the crankshaft |
US6273785B1 (en) * | 1998-09-02 | 2001-08-14 | Xerox Corporation | Non-contact support for cyclindrical machining |
EP1342536A1 (de) * | 2002-03-02 | 2003-09-10 | Hegenscheidt-MFD GmbH & Co. KG | Vorrichtung zur drehenden Mitnahme einer Kurbelwelle |
JP2005169530A (ja) * | 2003-12-09 | 2005-06-30 | Nissan Motor Co Ltd | 研削盤及び研削方法 |
JP4466142B2 (ja) * | 2004-03-16 | 2010-05-26 | 株式会社ジェイテクト | 振れ止め装置を備えた工作機械 |
US20080139092A1 (en) * | 2006-12-08 | 2008-06-12 | Lessway Richard J | Steady rest for rotating shaft |
DE102007019588A1 (de) * | 2007-04-24 | 2008-10-30 | Cnc-Service Egger | Vibrationsfreies Bearbeiten von Pilgerdornen |
CN101513722B (zh) * | 2008-02-18 | 2012-01-25 | 鸿富锦精密工业(深圳)有限公司 | 滚圆装置 |
CN101462244B (zh) * | 2009-01-13 | 2011-10-05 | 常州市腾田液压机械有限公司 | 长轴类工件表面磨削设备 |
DE102009024209B4 (de) * | 2009-06-08 | 2012-12-06 | Erwin Junker Maschinenfabrik Gmbh | Verfahren und vorrichtung zum mehrlagenschleifen von werkstücken |
DE102009051737B3 (de) * | 2009-11-03 | 2010-10-07 | Erwin Junker Maschinenfabrik Gmbh | Verfahren zum Schleifen der Haupt- und Hublager einer Kurbelwelle durch Aussenrundschleifen und Schleifmaschine zum Durchführen des Verfahrens |
-
2010
- 2010-12-22 IT ITMI2010A002349A patent/IT1403603B1/it active
-
2011
- 2011-12-13 WO PCT/EP2011/006373 patent/WO2012084159A1/en active Application Filing
- 2011-12-13 US US13/994,611 patent/US20130309945A1/en not_active Abandoned
- 2011-12-13 JP JP2013545092A patent/JP2014501180A/ja not_active Abandoned
- 2011-12-13 RU RU2013128362/02A patent/RU2013128362A/ru not_active Application Discontinuation
- 2011-12-13 EP EP11804957.6A patent/EP2655011B1/en active Active
- 2011-12-13 CN CN2011800664242A patent/CN103354773A/zh active Pending
- 2011-12-13 CA CA2821810A patent/CA2821810A1/en not_active Abandoned
- 2011-12-13 KR KR1020137018301A patent/KR20140045306A/ko not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
CN103354773A (zh) | 2013-10-16 |
CA2821810A1 (en) | 2012-06-28 |
ITMI20102349A1 (it) | 2012-06-23 |
RU2013128362A (ru) | 2015-01-27 |
EP2655011A1 (en) | 2013-10-30 |
WO2012084159A1 (en) | 2012-06-28 |
US20130309945A1 (en) | 2013-11-21 |
IT1403603B1 (it) | 2013-10-31 |
JP2014501180A (ja) | 2014-01-20 |
KR20140045306A (ko) | 2014-04-16 |
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