EP4058237B1 - Circular grinding machine with dressing unit - Google Patents
Circular grinding machine with dressing unit Download PDFInfo
- Publication number
- EP4058237B1 EP4058237B1 EP21810538.5A EP21810538A EP4058237B1 EP 4058237 B1 EP4058237 B1 EP 4058237B1 EP 21810538 A EP21810538 A EP 21810538A EP 4058237 B1 EP4058237 B1 EP 4058237B1
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- European Patent Office
- Prior art keywords
- axis
- rotation
- workpiece
- grinding
- dressing
- 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.)
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- 230000003068 static effect Effects 0.000 claims description 2
- 238000003754 machining Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000005498 polishing Methods 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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- 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
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- 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
Definitions
- the present invention relates to a cylindrical grinding machine for grinding a preferably rotatable workpiece.
- the cylindrical grinding machine is used in particular for grinding a cylindrical workpiece, for example, clamped between centers or on one side, using a rotating grinding wheel.
- the cylindrical grinding machine also includes a dressing unit for dressing the grinding wheel.
- the DE 31 36 396 A1 shows a portal grinding machine with one or more stands and a traverse attached to the stand at the top.
- An infeed carriage is movably mounted on the traverse and carries a tool drive head for driving a machining tool.
- a workpiece set-up bench has two spaced workpiece holders between which the workpiece to be machined is kept free and is driven in rotation about its longitudinal axis.
- the infeed carriage can be moved transversely to the longitudinal axis of the workpiece. When machining the workpiece, the machining tool is arranged above the longitudinal axis of the workpiece.
- the infeed carriage can also be moved parallel to the longitudinal axis of the workpiece.
- the two spaced workpiece holders are formed by a work headstock fixed on a working platform and by a tailstock that can be fixed on the working platform.
- the DD 7177 shows a device for fine dressing a grinding wheel.
- a positively guided dressing wheel that runs along and is set at an angle to the axis of rotation of the grinding wheel is moved parallel to the axis of rotation of the grinding wheel.
- the axis of rotation of the dressing wheel set at an angle lies in a common plane with the axis of rotation of the grinding wheel.
- EP 3 351 344 A1 describes a cylindrical grinding machine in which a grinding wheel is guided vertically upwards while the workpiece to be machined is positioned below the grinding wheel.
- a rotation axis of the workpiece lies on a vertical plane on which a rotation axis of the grinding wheel is moved in the vertical direction.
- the axis of rotation of the workpiece can be adjusted in this vertical plane as well as transversely or at right angles to it in the thousandths of a millimeter range.
- a disadvantage of this cylindrical grinding machine is that, despite the arrangement of the grinding wheel over the workpiece, unwanted tilting can occur between the grinding wheel and the workpiece, so that the machining accuracy that can be achieved is limited.
- a workpiece holder is known, with which workpieces are to be held in a position to be machined in a grinding machine.
- the holder is designed in particular for rod-shaped workpieces.
- the DE 20 2011 002 176 U1 shows a grinding/polishing machine that includes a machine body with a support base and a platform mounted on the support base for holding a workpiece. A post extends from the support base in a Z-axis direction.
- the grinding/polishing machine also includes a first grinding unit having a first grinding wheel and slidably mounted on the stand, and a second grinding unit having a second grinding wheel mounted to the first grinding unit for simultaneous movement with the first grinding unit and slidable relative to the first grinding unit to move the second grinding wheel in a Y-axis direction.
- From the DE 1 118 646 is an attachment that can be placed on a clamping table of a surface grinding machine for circular and conical grinding of round workpieces, on whose base plate provided with a clamping groove a tailstock and opposite this a work headstock motor-driven via a V-belt with a drive disk are arranged.
- the base plate can be tilted to both sides.
- the DE 10 2014 102 938 A1 shows a grinding machine with a tool magazine.
- the grinding machine comprises a machine bed, two vertical columns arranged laterally on the machine bed and a bridge which can be moved on the vertical columns in a horizontal linear Y-axis, in the manner of a portal structure.
- the grinding machine also includes an X slide that can be moved on the bridge in a horizontal linear X axis and a Z slide that can be moved on the X slide in a vertical linear Z axis, as well as a grinding spindle mounted on the Z slide.
- a machine table arranged on the machine bed carries a workpiece clamping device.
- the tool magazine is designed as a magazine wheel and has tool holders on its circumference for interchangeably accommodating grinding wheels. The tool magazine can be rotated about an axis parallel to the Z-axis on the machine table.
- the DE 195 14 390 A1 shows a grinding machine with a grinding spindle arranged on a grinding spindle carrier and having an axis inclined obliquely downwards.
- a workpiece holder is arranged axially parallel to a grinding wheel and approximately in the axial direction of the grinding spindle. The workpiece holder can be moved perpendicularly to the direction of the axis of the grinding spindle.
- a housing encloses the workpiece holder and the grinding wheel. The housing is arranged at an angle in the axial direction of the grinding spindle and has an outlet opening for coolant at the lowest point. Drives for the linear movements of the workpiece holder and for the rotary movements of the grinding wheel and a workpiece are arranged outside the housing.
- the WO 2013/178625 A1 relates to a device for sharpening tools with cutting edges for machining.
- the device comprises a monolithic machine block with at least two functional surfaces arranged at an angle to one another and a workpiece carrier arrangement for clamping a workpiece to be machined.
- the device also includes a machining unit to which a tool for machining the workpiece can be attached.
- the processing unit is displaceably attached to a carrier.
- the machine block has a first linear guide on the first functional surface for guiding a workpiece carrier arrangement along a first guide axis and on the second functional surface a second linear guide for guiding the carrier for the machining unit along a second guide axis.
- the DE 10 2014 115 149 B3 shows a grinding machine with a machine bed and with a grinding spindle which can be coupled to a spindle drive and for receiving a grinding wheel is trained.
- a control spindle can be coupled to a spindle drive and is designed to hold a control wheel.
- a workpiece support is designed to hold a workpiece to be machined between the grinding spindle and the control spindle.
- the grinding spindle and the control spindle are coupled to the machine bed and can be moved relative to one another.
- the grinding spindle and the control spindle form a spindle set.
- a longitudinal guide is formed on the machine bed, on which a base slide is accommodated.
- the machine bed and the base slide define a first axis of movement.
- the grinding spindle is coupled to the base slide and assigned to a second axis of movement.
- the object of the present invention is to increase the machining accuracy of a cylindrical grinding machine while keeping the structural design simple. At the same time, a high level of dressing accuracy should be achievable. Those should be preferred The dimensions of the machine can be designed in such a way that it only requires a small amount of space in a workshop.
- the cylindrical grinding machine according to the invention is used for grinding a workpiece.
- the workpiece is preferably made of metal, for example steel.
- Rotationally symmetrical as well as non-rotationally symmetrical workpieces can be processed with the cylindrical grinding machine.
- high demands can be met with regard to the surface to be achieved, accuracy, dimensional accuracy and freedom from twist.
- the cylindrical grinding machine includes a machine bed, which is preferably attached to a main stand of the cylindrical grinding machine, so that the machine bed rests firmly on a floor on which the main stand stands.
- the main stand forms a support for all other components of the cylindrical grinding machine.
- the machine bed is preferably aligned horizontally and is preferably connected to the main column without moving bearing units.
- the machine bed carries a swivel table, on which a work headstock for the rotary drive of the work piece is arranged in a fixed mountable manner.
- the workhead and also the swivel table are not designed to be displaced during grinding of the workpiece. In particular, the workhead is not designed to be displaced axially in the direction of an axis of the workhead during grinding of the workpiece.
- the workhead is preferably fixed on the swivel table assembled.
- the work headstock, which can be mounted firmly on the machine bed, and the tailstock, which can be fixed on the machine bed are firmly connected to the
- a tailstock is also arranged in a fixed manner on the swivel table or on a lifting carriage attached to it.
- the tailstock is used to hold the workpiece at an axial end of the workpiece opposite the workpiece headstock.
- the lifting carriage can move the tailstock axially when the workpiece is to be clamped or unclamped.
- a first axis of rotation about which the workpiece can be rotated is defined by the workhead and the tailstock.
- the tailstock can preferably be moved and fixed on the swivel table in order to be able to adapt it to workpieces of different lengths.
- the swivel table can be swiveled relative to the machine bed about a swivel axis aligned in a horizontal direction transverse to the first axis of rotation.
- the pivoting movement can preferably be fixed, so that the pivoting table cannot be pivoted, in particular during the grinding of the workpiece. If the pivoting movement is fixed, the pivoting table is preferably firmly connected to the machine bed.
- the pivoting table can preferably be pivoted with respect to a horizontal line, so that the pivoting table is aligned horizontally in an initial position. In this starting position, the first axis of rotation is also aligned horizontally.
- the cylindrical grinding machine also includes a grinding wheel that can be rotated about a second axis of rotation for grinding the workpiece.
- the first axis of rotation and the second axis of rotation are arranged together in a vertical plane.
- the second axis of rotation is positioned above the first axis of rotation such that the grinding wheel is positioned above the workpiece.
- the workpiece is thus machined from above by the grinding wheel.
- the second axis of rotation is arranged above the first axis of rotation with respect to the vertical direction.
- the grinding wheel is preferably seated on a shaft, which is in particular a grinding spindle.
- This grinding spindle is preferably mounted in at least one, preferably in several, rotary bearings, so that it can rotate, whereby the grinding wheel also rotates and the workpiece can be ground with the grinding wheel.
- the second axis of rotation is preferably aligned horizontally, in particular fixed horizontally.
- the cylindrical grinding machine also includes a longitudinal guide for displacing the rotatable grinding wheel axially in the direction of the second axis of rotation, ie for displacing in the direction defined by the second axis of rotation.
- a tower which carries the grinding wheel spindle and the grinding wheel, is shifted axially.
- the longitudinal guide is also arranged in the vertical plane comprising the first axis of rotation and the second axis of rotation.
- the longitudinal guide has in particular a central guide axis which is preferably arranged in the vertical plane comprising the first axis of rotation and the second axis of rotation.
- the longitudinal guide is designed in particular to move the grinding wheel indirectly along the second axis of rotation.
- the longitudinal guide is preferably designed to displace the grinding wheel spindle carrying the grinding wheel or the at least one bearing supporting the grinding wheel spindle in the direction of the second axis of rotation, as a result of which the grinding wheel is displaced indirectly in the direction of the second axis of rotation, i.e. on the second axis of rotation.
- the shaft is preferably a grinding spindle with an electric grinding wheel motor.
- the at least one bearing is accordingly a spindle bearing.
- the longitudinal guide then serves for the direct or indirect axial displacement of the grinding wheel motor in the direction of the second axis of rotation, as a result of which the grinding wheel is also displaced indirectly in the direction of the second axis of rotation.
- the cylindrical grinding machine also includes a dressing unit for dressing the grinding wheel.
- the dressing unit is arranged in the axial direction next to the tailstock on the machine bed in relation to the first axis of rotation.
- the dressing unit is therefore preferably also arranged in the first axis of rotation, specifically next to the tailstock on the machine bed.
- the dressing unit is preferably mounted on the machine bed so that it can be displaced in a horizontal direction transverse to the first axis of rotation, so that it can be moved in this direction in relation to the grinding wheel; for example, to guide a dressing tool sitting on the dressing unit to the grinding wheel or to be able to choose from different dressing tools sitting on the dressing unit.
- the dressing unit, the workhead and the Tailstock are arranged together on the machine bed.
- the dressing unit arranged on the machine bed is preferably firmly connected to the machine bed, so that the dressing unit is also firmly connected to the workhead, the tailstock and the main stand via the machine bed during a dressing process. This prevents unwanted displacements of the dressing unit during dressing, which leads to high accuracy when dressing the grinding wheel.
- a particular advantage of the cylindrical grinding machine is that the joint arrangement of the two rotational axes and the longitudinal guide in a single vertical plane allows high machining accuracy and a compact design of the cylindrical grinding machine.
- the workpiece sitting on the workhead does not have to be moved in the direction of the second axis of rotation, since the grinding wheel can be moved lengthwise with the help of the longitudinal guide.
- the workpiece sits firmly on the machine bed, which enables increased machining accuracy.
- the cylindrical grinding machine further includes a grinding wheel motor.
- the grinding wheel motor has a motor shaft coupled to the grinding wheel spindle on which the grinding wheel is fixedly mounted.
- the motor shaft is in the second axis of rotation.
- the at least one rotary bearing for mounting the grinding wheel is formed, for example, in the grinding wheel motor.
- the longitudinal guide carries the grinding wheel motor together with the grinding wheel.
- the longitudinal guide carries the grinding wheel motor preferably indirectly.
- the longitudinal guide preferably comprises two parallel guide rails which are arranged in a horizontal plane.
- the central guide axis runs in the middle between these two guide rails and is preferably arranged in the vertical plane comprising the first axis of rotation and the second axis of rotation.
- the guide rails are preferably located on the main stand of the cylindrical grinding machine.
- the longitudinal guide preferably includes a first actuator, by which the longitudinal guide can be driven.
- the grinding wheel can thus be displaced in the direction of the second axis of rotation by the drive of the first actuator.
- the longitudinal guide allows the rotatable grinding wheel to be displaced by preferably at least 400 mm and more preferably at least 700 mm.
- the cylindrical grinding machine also includes a vertical guide for guiding the grinding wheel vertically.
- the grinding wheel can be guided up and down in the vertical direction by the vertical guide.
- the grinding wheel can therefore be guided to the workpiece from above with the vertical guide in order to grind the workpiece.
- the grinding wheel is guided in the radial direction to the workpiece by the vertical guide.
- the vertical guide preferably carries the grinding wheel motor together with the grinding wheel.
- the Longitudinal guide preferably carries the vertical guide and thus indirectly also the grinding wheel motor.
- the vertical guide preferably includes a second actuator, by which the vertical guide can be driven.
- the grinding wheel can be shifted up and down in the vertical direction by driving the second actuator.
- the vertical guide allows the rotatable grinding wheel to be displaced by preferably at least 200 mm.
- the cylindrical grinder further includes a turret supported by the longitudinal guide.
- the tower carries the vertical guide, with the vertical guide preferably being arranged in or on the tower.
- the vertical guide carries the grinding wheel; in particular the grinding wheel motor with the coupled grinding wheel spindle and the grinding wheel sitting on it.
- the tower is arranged next to the grinding wheel in the axial direction in relation to the second axis of rotation.
- the tower is preferably arranged next to the dressing unit in the axial direction relative to the first axis of rotation, with the dressing unit being located between the tower and the tailstock.
- the tower is preferably carried by the two guide rails on the main stand and is guided in these guide rails, which form the longitudinal guide.
- the tower is slid along the longitudinal guide to move the grinding wheel.
- the turret preferably has a central axis which is vertically oriented and axially adjacent to the grinding wheel relative to the second axis of rotation is arranged.
- the central axis is preferably arranged next to the dressing unit in the axial direction relative to the first axis of rotation, the dressing unit being located between the central axis and the tailstock.
- the middle axis preferably lies in the vertical plane comprising the first axis of rotation and the second axis of rotation.
- the work headstock preferably comprises a work piece motor for rotating the work piece and a work piece spindle.
- the workhead can be moved on the swivel table and fixed there.
- the dressing unit preferably comprises a number of different dressing tools, which are arranged next to one another in a horizontal plane. Since the dressing tools are mounted on the dressing unit so that they can be displaced in a horizontal direction transversely to the first axis of rotation, one of the dressing tools can be selected for dressing in each case by such a displacement process.
- the plurality of dressing tools are preferably arranged next to one another in a horizontal direction transverse to the first axis of rotation.
- the dressing unit comprises at least one static dressing tool and at least one dynamic dressing tool, so that different dressing processes can be carried out on the grinding wheel.
- the pivoting table is pivotably mounted in a pivot bearing relative to the machine bed at an axial first end of the pivoting table relative to the first axis of rotation.
- a vertical distance between an axial one related to the first axis of rotation second end of the swivel table and the machine bed is defined by an adjustment element.
- the vertical distance between the axial second end of the swivel table, which is related to the first axis of rotation, and the machine bed is defined in particular by an adjustable length of the adjustment element.
- the adjusting element is preferably formed by a spindle.
- the adjusting element preferably includes a coarse adjustment and a fine adjustment.
- the swivel table can preferably be swiveled by at least ⁇ 5° in relation to the machine bed.
- the machine bed includes a base plate on which the dressing unit, the pivot bearing and the adjustment element are attached.
- the base plate is preferably made of cast steel.
- the cylindrical grinding machine includes a main stand 01, which carries a tower 02 and a machine bed 03.
- the tower 02 carries a grinding unit 04, which is also referred to as a grinding headstock and which includes a grinding wheel motor (not shown) and a grinding wheel 06 driven by the grinding wheel motor.
- a swivel table 07 is arranged on the machine bed 03, on which a workpiece headstock 08 for the rotational drive of a workpiece 09 (shown in 4 ) is fixed.
- a tailstock 11 is arranged on the pivoting table 07 so that it can be fixed. The distance between the tailstock 11 and the workhead 08 can be changed.
- the workpiece 09 is between the workhead 08 and the tailstock 11 clampable.
- Workpiece headstock 08 includes a workpiece motor 12 for rotationally driving workpiece 09.
- Workpiece headstock 08 defines a first axis of rotation about which workpiece 09 rotates.
- the swivel table 07 can be tilted relative to the machine bed 03.
- the swivel table 07 is connected to the machine bed 03 via a swivel bearing 13 on the one hand and to the machine bed 03 via an adjustment element 14 on the other hand.
- a dressing unit 16 for dressing the grinding wheel 06 is also arranged on the machine bed 03 and is located axially next to the tailstock 11 in relation to the first axis of rotation.
- the dressing unit 16 is thus located between the tailstock 11 and the tower 02.
- the dressing unit 16 is mounted on the machine bed 03 so that it can be displaced in a horizontal direction transversely to the first axis of rotation.
- the grinding wheel motor drives the grinding wheel 06 so that it rotates about a second axis of rotation.
- Tower 02, the first axis of rotation and the second axis of rotation all lie in a vertical plane.
- Tower 02 is carried by main stand 01 via a longitudinal guide 17 .
- the longitudinal guide 17 allows the tower 02 to be displaced axially in the direction of the second axis of rotation, ie in the vertical plane comprising the first axis of rotation and the second axis of rotation.
- the grinding wheel 06 is also moved in this direction.
- a vertical guide 18 (shown in Fig 2 ) arranged, which carries the grinding unit 04.
- the vertical guide 18 allows a vertical displacement of the grinding unit 04 relative to the tower 02.
- the vertical guide 18 thus allows a vertical displacement of the grinding wheel 06, so that the grinding wheel 06 can be guided in the vertical direction to the workpiece 09.
- the vertical guide 18 has a central axis which lies in the vertical plane comprising the first axis of rotation and the second axis of rotation.
- FIG 2 shows a perspective view of FIG 1 cylindrical grinding machine shown.
- the vertical guide 18 located in the tower 02 can be seen, among other things.
- FIG 3 shows a detailed view of the in 1 cylindrical grinding machine shown.
- the swivel table 07 is aligned horizontally.
- FIG 4 shows a further detailed view of the in 1 cylindrical grinding machine shown.
- the swiveling table 07 is inclined by -10° in relation to the machine bed 03 and thus also by -10° in relation to the horizontal.
- the adjustment element 14 is adjusted.
- the workpiece 09 to be ground is shown in this view.
- the grinding wheel 06 rotating about the second axis of rotation grinds the workpiece 09 rotating about the first axis of rotation.
- figure 5 shows a further detailed view of the in 1 cylindrical grinding machine shown.
- the swivel table 07 is in this representation by +6 ° compared to the machine bed 03 and thus also inclined by +6° to the horizontal. To set the inclination, the adjustment element 14 is adjusted.
- FIG. 6 shows a side view of in 1 shown cylindrical grinding machine during a dressing process.
- the grinding wheel 06 was adjusted using the longitudinal guide 17 and the vertical guide 18 (shown in 2 ) to the dressing unit 16.
- the grinding wheel 06 rotating about the second axis of rotation is dressed by the dressing unit 16 .
- FIG. 7 shows a detailed view of the in 1 shown cylindrical grinding machine during a dressing process.
- the grinding wheel 06 was adjusted using the longitudinal guide 17 (shown in 6 ) and using the vertical guide 18 (shown in 2 ) to the dressing unit 16.
- the swivel table 07 was inclined by -10° relative to the machine bed 03 and thus also by -10° relative to the horizontal.
- the workpiece 09 to be ground is also shown in this view.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Description
Die vorliegende Erfindung betrifft eine Rundschleifmaschine zum Schleifen eines vorzugsweise rotierbaren Werkstückes. Die Rundschleifmaschine dient insbesondere zum Schleifen eines beispielsweise zylinderförmigen Werkstückes, zwischen Spitzen oder einseitig gespannt, mithilfe einer rotierenden Schleifscheibe. Die Rundschleifmaschine umfasst außerdem eine Abrichteinheit zum Abrichten der Schleifscheibe.The present invention relates to a cylindrical grinding machine for grinding a preferably rotatable workpiece. The cylindrical grinding machine is used in particular for grinding a cylindrical workpiece, for example, clamped between centers or on one side, using a rotating grinding wheel. The cylindrical grinding machine also includes a dressing unit for dressing the grinding wheel.
Die
Die DD 7177 zeigt eine Vorrichtung zum Feinabrichten einer Schleifscheibe. Eine zwangläufig geführte, mitlaufende und winklig zur Drehachse der Schleifscheibe gestellte Abrichtscheibe wird parallel zur Drehachse der Schleifscheibe bewegt. Die Drehachse der unter einem Winkel gestellten Abrichtscheibe liegt in einer gemeinsamen Ebene mit der Drehachse der Schleifscheibe.The DD 7177 shows a device for fine dressing a grinding wheel. A positively guided dressing wheel that runs along and is set at an angle to the axis of rotation of the grinding wheel is moved parallel to the axis of rotation of the grinding wheel. The axis of rotation of the dressing wheel set at an angle lies in a common plane with the axis of rotation of the grinding wheel.
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Die Aufgabe der vorliegenden Erfindung besteht ausgehend vom Stand der Technik darin, die Bearbeitungsgenauigkeit einer Rundschleifmaschine zu erhöhen und dabei den konstruktiven Aufbau einfach zu halten. Gleichzeitig soll eine hohe Abrichtgenauigkeit realisierbar sein. Bevorzugt sollen die Abmessungen der Maschine so gestaltbar sein, dass sie in einer Werkhalle nur eine geringe Stellplatzfläche benötigt.Based on the prior art, the object of the present invention is to increase the machining accuracy of a cylindrical grinding machine while keeping the structural design simple. At the same time, a high level of dressing accuracy should be achievable. Those should be preferred The dimensions of the machine can be designed in such a way that it only requires a small amount of space in a workshop.
Die genannte Aufgabe wird gelöst durch eine Rundschleifmaschine gemäß dem beigefügten Anspruch 1.The above object is achieved by a cylindrical grinding machine according to appended
Die erfindungsgemäße Rundschleifmaschine dient zum Schleifen eines Werkstückes. Das Werkstück besteht bevorzugt aus Metall, beispielsweise aus Stahl. Mit der Rundschleifmaschine können rotationssymmetrische aber auch nicht-rotationssymmetrische Werkstücke bearbeitet werden. Durch das Schleifen des Werkstückes mit der Rundschleifmaschine können hohe Anforderungen hinsichtlich der zu erzielenden Oberfläche, Genauigkeit, Maßhaltigkeit und Drallfreiheit erfüllt werden.The cylindrical grinding machine according to the invention is used for grinding a workpiece. The workpiece is preferably made of metal, for example steel. Rotationally symmetrical as well as non-rotationally symmetrical workpieces can be processed with the cylindrical grinding machine. By grinding the workpiece with the cylindrical grinding machine, high demands can be met with regard to the surface to be achieved, accuracy, dimensional accuracy and freedom from twist.
Die Rundschleifmaschine umfasst ein Maschinenbett, welches bevorzugt an einem Hauptständer der Rundschleifmaschine befestigt ist, sodass das Maschinenbett fest auf einem Boden, auf welchem der Hauptständer steht, ruht. Der Hauptständer bildet einen Träger für alle weiteren Komponenten der Rundschleifmaschine. Das Maschinenbett ist bevorzugt horizontal ausgerichtet und bevorzugt ohne bewegliche Lagereinheiten mit dem Hauptständer verbunden. Das Maschinenbett trägt einen Schwenktisch, auf welchem ein Werkstückspindelstock zum rotatorischen Antrieb des Werkstückes fest montierbar angeordnet ist. Der Werkstückspindelstock und auch der Schwenktisch sind nicht dazu ausgebildet, während eines Schleifens des Werkstückes verschoben zu werden. Der Werkstückspindelstock ist insbesondere nicht dazu ausgebildet, während eines Schleifens des Werkstückes axial in Richtung einer Achse des Werkstückspindelstockes verschoben zu werden. Der Werkstückspindelstock ist bevorzugt fest auf dem Schwenktisch montiert. Der fest auf dem Maschinenbett montierbare Werkstückspindelstock und der auf dem Maschinenbett festlegbar angeordnete Reitstock sind während eines Schleif- bzw. Abrichtvorganges fest mit dem Maschinenbett verbunden.The cylindrical grinding machine includes a machine bed, which is preferably attached to a main stand of the cylindrical grinding machine, so that the machine bed rests firmly on a floor on which the main stand stands. The main stand forms a support for all other components of the cylindrical grinding machine. The machine bed is preferably aligned horizontally and is preferably connected to the main column without moving bearing units. The machine bed carries a swivel table, on which a work headstock for the rotary drive of the work piece is arranged in a fixed mountable manner. The workhead and also the swivel table are not designed to be displaced during grinding of the workpiece. In particular, the workhead is not designed to be displaced axially in the direction of an axis of the workhead during grinding of the workpiece. The workhead is preferably fixed on the swivel table assembled. The work headstock, which can be mounted firmly on the machine bed, and the tailstock, which can be fixed on the machine bed, are firmly connected to the machine bed during a grinding or dressing process.
Auf dem Schwenktisch bzw. einem an diesem befestigten Hubschlitten ist zudem ein Reitstock festlegbar angeordnet. Der Reitstock dient zur Aufnahme des Werkstückes an einem dem Werkstückspindelstock gegenüberliegenden axialen Ende des Werkstückes. Der Hubschlitten kann den Reitstock axial verlagern, wenn das Werkstück eingespannt bzw. ausgespannt werden soll. Durch den Werkstückspindelstock und den Reitstock ist eine erste Rotationsachse definiert, um welche das Werkstück rotierbar ist. Der Reitstock ist bevorzugt auf dem Schwenktisch verschiebbar und fixierbar, um an unterschiedlich lange Werkstücke angepasst werden zu können.A tailstock is also arranged in a fixed manner on the swivel table or on a lifting carriage attached to it. The tailstock is used to hold the workpiece at an axial end of the workpiece opposite the workpiece headstock. The lifting carriage can move the tailstock axially when the workpiece is to be clamped or unclamped. A first axis of rotation about which the workpiece can be rotated is defined by the workhead and the tailstock. The tailstock can preferably be moved and fixed on the swivel table in order to be able to adapt it to workpieces of different lengths.
Der Schwenktisch ist um eine in einer horizontalen Richtung quer zur ersten Rotationsachse ausgerichtete Schwenkachse gegenüber dem Maschinenbett schwenkbar. Somit ist auch das im Werkstückspindelstock eingespannte Werkstück gegenüber dem Maschinenbett schwenkbar. Daher ist auch die erste Rotationsachse innerhalb einer vertikalen Ebene schwenkbar. Die Schwenkbewegung ist bevorzugt fixierbar, sodass der Schwenktisch insbesondere während des Schleifens des Werkstückes nicht schwenkbar ist. Wenn die Schwenkbewegung fixiert ist, ist der Schwenktisch bevorzugt fest mit dem Maschinenbett verbunden. Der Schwenktisch ist bevorzugt in Bezug auf eine Horizontale schwenkbar, sodass der Schwenktisch in einer Ausgangslage horizontal ausgerichtet ist. In dieser Ausgangslage ist auch die erste Rotationsachse horizontal ausgerichtet.The swivel table can be swiveled relative to the machine bed about a swivel axis aligned in a horizontal direction transverse to the first axis of rotation. This means that the workpiece clamped in the workhead can also be swiveled relative to the machine bed. Therefore, the first axis of rotation can also be pivoted within a vertical plane. The pivoting movement can preferably be fixed, so that the pivoting table cannot be pivoted, in particular during the grinding of the workpiece. If the pivoting movement is fixed, the pivoting table is preferably firmly connected to the machine bed. The pivoting table can preferably be pivoted with respect to a horizontal line, so that the pivoting table is aligned horizontally in an initial position. In this starting position, the first axis of rotation is also aligned horizontally.
Die Rundschleifmaschine umfasst zudem eine um eine zweite Rotationsachse rotierbare Schleifscheibe zum Schleifen des Werkstückes. Die erste Rotationsachse und die zweite Rotationsachse sind gemeinsam in einer vertikalen Ebene angeordnet. Die zweite Rotationsachse ist über der ersten Rotationsachse angeordnet, sodass die Schleifscheibe über dem Werkstück angeordnet ist. Somit erfolgt ein Bearbeiten des Werkstückes durch die Schleifscheibe von oben. Die zweite Rotationsachse ist bezogen auf die vertikale Richtung über der ersten Rotationsachse angeordnet. Die Schleifscheibe sitzt bevorzugt auf einer Welle, bei welcher es sich insbesondere um eine Schleifspindel handelt. Diese Schleifspindel ist bevorzugt in mindestens einem, vorzugsweise in mehreren rotativen Lagern gelagert, sodass sie rotieren kann, wodurch auch die Schleifscheibe rotiert und das Werkstück mit der Schleifscheibe geschliffen werden kann. Die zweite Rotationsachse ist bevorzugt horizontal ausgerichtet, insbesondere fest horizontal.The cylindrical grinding machine also includes a grinding wheel that can be rotated about a second axis of rotation for grinding the workpiece. The first axis of rotation and the second axis of rotation are arranged together in a vertical plane. The second axis of rotation is positioned above the first axis of rotation such that the grinding wheel is positioned above the workpiece. The workpiece is thus machined from above by the grinding wheel. The second axis of rotation is arranged above the first axis of rotation with respect to the vertical direction. The grinding wheel is preferably seated on a shaft, which is in particular a grinding spindle. This grinding spindle is preferably mounted in at least one, preferably in several, rotary bearings, so that it can rotate, whereby the grinding wheel also rotates and the workpiece can be ground with the grinding wheel. The second axis of rotation is preferably aligned horizontally, in particular fixed horizontally.
Die Rundschleifmaschine umfasst zudem eine Längsführung zum Verschieben der rotierbaren Schleifscheibe axial in Richtung der zweiten Rotationsachse, d. h. zum Verschieben in die durch die zweite Rotationsachse definierte Richtung. Insbesondere wird dazu ein Turm, welcher die Schleifscheibenspindel und die Schleifscheibe trägt, axial verschoben. Hierdurch kann die Schleifscheibe an unterschiedliche axiale Positionen des Werkstückes bewegt werden, um das Werkstück jeweils dort zu schleifen. Die Längsführung ist ebenfalls in der die erste Rotationsachse und die zweite Rotationsachse umfassenden vertikalen Ebene angeordnet. Die Längsführung weist insbesondere eine mittlere Führungsachse auf, welche bevorzugt in der die erste Rotationsachse und die zweite Rotationsachse umfassenden vertikalen Ebene angeordnet ist. Die Längsführung ist insbesondere dazu ausgebildet, die Schleifscheibe mittelbar entlang der zweiten Rotationsachse zu verschieben. Die Längsführung ist bevorzugt dazu ausgebildet, die die Schleifscheibe tragende Schleifscheibenspindel bzw. das mindestens eine die Schleifscheibenspindel lagernde Lager in Richtung der zweiten Rotationsachse zu verschieben, wodurch die Schleifscheibe mittelbar in Richtung der zweiten Rotationsachse, d. h. auf der zweiten Rotationsachse verschoben wird. Bevorzugt handelt es sich bei der Welle um eine Schleifspindel mit einem elektrischen Schleifscheibenmotor. Bei dem mindestens einen Lager handelt es sich entsprechend um ein Spindellager. Die Längsführung dient dann zum mittelbaren oder unmittelbaren Verschieben des Schleifscheibenmotors axial in Richtung der zweiten Rotationsachse, wodurch auch die Schleifscheibe mittelbar in Richtung der zweiten Rotationsachse verschoben wird. Ein Vorteil der axialen Verschiebung des Schleifscheibenmotors besteht darin, dass der Abstand zwischen dem Spindellager und der Schleifscheibe konstant ist.The cylindrical grinding machine also includes a longitudinal guide for displacing the rotatable grinding wheel axially in the direction of the second axis of rotation, ie for displacing in the direction defined by the second axis of rotation. For this purpose, in particular, a tower, which carries the grinding wheel spindle and the grinding wheel, is shifted axially. As a result, the grinding wheel can be moved to different axial positions of the workpiece in order to grind the workpiece there in each case. The longitudinal guide is also arranged in the vertical plane comprising the first axis of rotation and the second axis of rotation. The longitudinal guide has in particular a central guide axis which is preferably arranged in the vertical plane comprising the first axis of rotation and the second axis of rotation. The longitudinal guide is designed in particular to move the grinding wheel indirectly along the second axis of rotation. The longitudinal guide is preferably designed to displace the grinding wheel spindle carrying the grinding wheel or the at least one bearing supporting the grinding wheel spindle in the direction of the second axis of rotation, as a result of which the grinding wheel is displaced indirectly in the direction of the second axis of rotation, i.e. on the second axis of rotation. The shaft is preferably a grinding spindle with an electric grinding wheel motor. The at least one bearing is accordingly a spindle bearing. The longitudinal guide then serves for the direct or indirect axial displacement of the grinding wheel motor in the direction of the second axis of rotation, as a result of which the grinding wheel is also displaced indirectly in the direction of the second axis of rotation. An advantage of the axial displacement of the grinding wheel motor is that the distance between the spindle bearing and the grinding wheel is constant.
Die Rundschleifmaschine umfasst weiterhin eine Abrichteinheit zum Abrichten der Schleifscheibe. Die Abrichteinheit ist bezogen auf die erste Rotationsachse in axialer Richtung neben dem Reitstock auf dem Maschinenbett angeordnet. Die Abrichteinheit ist also bevorzugt auch in der ersten Rotationsachse angeordnet und zwar neben dem Reitstock auf dem Maschinenbett. Die Abrichteinheit ist vorzugsweise in einer horizontalen Richtung quer zur ersten Rotationsachse verschiebbar auf dem Maschinenbett gelagert, sodass sie in dieser Richtung zur Schleifscheibe bewegt werden kann; beispielsweise um ein auf der Abrichteinheit sitzendes Abrichtwerkzeug an die Schleifscheibe zu führen oder um aus verschiedenen auf der Abrichteinheit sitzenden Abrichtwerkzeugen auswählen zu können. Die Abrichteinheit, der Werkstückspindelstock und der Reitstock sind gemeinsam auf dem Maschinenbett angeordnet. Die auf dem Maschinenbett angeordnete Abrichteinheit ist bevorzugt fest mit dem Maschinenbett verbunden, sodass die Abrichteinheit während eines Abrichtvorganges über das Maschinenbett auch fest mit dem Werkstückspindelstock, dem Reitstock und dem Hauptständer verbunden ist. Dadurch wird ausgeschlossen, dass es während des Abrichtens zu unerwünschten Verlagerungen der Abrichteinheit kommt, was zu einer hohen Genauigkeit beim Abrichten der Schleifscheibe führt.The cylindrical grinding machine also includes a dressing unit for dressing the grinding wheel. The dressing unit is arranged in the axial direction next to the tailstock on the machine bed in relation to the first axis of rotation. The dressing unit is therefore preferably also arranged in the first axis of rotation, specifically next to the tailstock on the machine bed. The dressing unit is preferably mounted on the machine bed so that it can be displaced in a horizontal direction transverse to the first axis of rotation, so that it can be moved in this direction in relation to the grinding wheel; for example, to guide a dressing tool sitting on the dressing unit to the grinding wheel or to be able to choose from different dressing tools sitting on the dressing unit. The dressing unit, the workhead and the Tailstock are arranged together on the machine bed. The dressing unit arranged on the machine bed is preferably firmly connected to the machine bed, so that the dressing unit is also firmly connected to the workhead, the tailstock and the main stand via the machine bed during a dressing process. This prevents unwanted displacements of the dressing unit during dressing, which leads to high accuracy when dressing the grinding wheel.
Ein besonderer Vorteil der Rundschleifmaschine besteht darin, dass die gemeinsame Anordnung der beiden Rotationsachsen und der Längsführung in einer einzigen vertikalen Ebene eine hohe Bearbeitungsgenauigkeit und einen kompakten Aufbau der Rundschleifmaschine erlaubt. Zudem muss das auf dem Werkstückspindelstock sitzende Werkstück nicht in Richtung der zweiten Rotationsachse verfahren werden, da die Schleifscheibe mithilfe der Längsführung längs verfahrbar ist. Somit sitzt das Werkstück fest auf dem Maschinenbett, wodurch eine erhöhte Bearbeitungsgenauigkeit ermöglicht ist. Durch den Verzicht auf eine während der Bearbeitung bewegliche Führungseinheit am Werkspindelstock ist insbesondere auch bei hohen senkrecht zur Rotationsachse wirkenden Schleifkräften eine Verformung dieser Führungseinheit ausgeschlossen, wodurch die Position des Werkstücks während des gesamten Schleifvorgangs auch unter dynamischer Beanspruchung unveränderlich ist.A particular advantage of the cylindrical grinding machine is that the joint arrangement of the two rotational axes and the longitudinal guide in a single vertical plane allows high machining accuracy and a compact design of the cylindrical grinding machine. In addition, the workpiece sitting on the workhead does not have to be moved in the direction of the second axis of rotation, since the grinding wheel can be moved lengthwise with the help of the longitudinal guide. Thus, the workpiece sits firmly on the machine bed, which enables increased machining accuracy. By doing without a guide unit on the work headstock that can be moved during machining, deformation of this guide unit is excluded, especially with high grinding forces acting perpendicular to the axis of rotation, which means that the position of the workpiece is unchangeable during the entire grinding process, even under dynamic stress.
Bei bevorzugten Ausführungsformen umfasst die Rundschleifmaschine weiterhin einen Schleifscheibenmotor. Der Schleifscheibenmotor weist eine Motorwelle auf, die mit der Schleifscheibenspindel gekoppelt ist, auf welcher die Schleifscheibe fest montiert ist. Die Motorwelle liegt in der zweiten Rotationsachse. Das mindestens eine rotative Lager zur Lagerung der Schleifscheibe ist beispielsweise in dem Schleifscheibenmotor ausgebildet. Die Längsführung trägt den Schleifscheibenmotor gemeinsam mit der Schleifscheibe. Die Längsführung trägt den Schleifscheibenmotor bevorzugt mittelbar.In preferred embodiments, the cylindrical grinding machine further includes a grinding wheel motor. The grinding wheel motor has a motor shaft coupled to the grinding wheel spindle on which the grinding wheel is fixedly mounted. The motor shaft is in the second axis of rotation. The at least one rotary bearing for mounting the grinding wheel is formed, for example, in the grinding wheel motor. The longitudinal guide carries the grinding wheel motor together with the grinding wheel. The longitudinal guide carries the grinding wheel motor preferably indirectly.
Die Längsführung umfasst bevorzugt zwei parallele Führungsschienen, die in einer horizontalen Ebene angeordnet sind. In der Mitte zwischen diesen beiden Führungsschienen verläuft die mittlere Führungsachse, welche bevorzugt in der die erste Rotationsachse und die zweite Rotationsachse umfassenden vertikalen Ebene angeordnet ist. Die Führungsschienen sitzen bevorzugt auf dem Hauptständer der Rundschleifmaschine.The longitudinal guide preferably comprises two parallel guide rails which are arranged in a horizontal plane. The central guide axis runs in the middle between these two guide rails and is preferably arranged in the vertical plane comprising the first axis of rotation and the second axis of rotation. The guide rails are preferably located on the main stand of the cylindrical grinding machine.
Die Längsführung umfasst bevorzugt einen ersten Aktuator, durch welchen die Längsführung antreibbar ist. Somit kann die Schleifscheibe durch den Antrieb des ersten Aktuators in Richtung der zweiten Rotationsachse verschoben werden. Die Längsführung erlaubt eine Verschiebung der rotierbaren Schleifscheibe von bevorzugt mindestens 400 mm und weiter bevorzugt mindestens 700 mm.The longitudinal guide preferably includes a first actuator, by which the longitudinal guide can be driven. The grinding wheel can thus be displaced in the direction of the second axis of rotation by the drive of the first actuator. The longitudinal guide allows the rotatable grinding wheel to be displaced by preferably at least 400 mm and more preferably at least 700 mm.
Bei bevorzugten Ausführungsformen umfasst die Rundschleifmaschine weiterhin eine Vertikalführung zur vertikalen Führung der Schleifscheibe. Die Schleifscheibe kann durch die vertikale Führung in vertikaler Richtung nach oben und unten geführt werden. Die Schleifscheibe ist daher mit der Vertikalführung von oben zum Werkstück führbar, um das Werkstück zu schleifen. Bezogen auf die erste Rotationsachse wird die Schleifscheibe durch die Vertikalführung in radialer Richtung zum Werkstück geführt. Die Vertikalführung trägt bevorzugt den Schleifscheibenmotor gemeinsam mit der Schleifscheibe. Die Längsführung trägt bevorzugt die Vertikalführung und somit mittelbar auch den Schleifscheibenmotor.In preferred embodiments, the cylindrical grinding machine also includes a vertical guide for guiding the grinding wheel vertically. The grinding wheel can be guided up and down in the vertical direction by the vertical guide. The grinding wheel can therefore be guided to the workpiece from above with the vertical guide in order to grind the workpiece. In relation to the first axis of rotation, the grinding wheel is guided in the radial direction to the workpiece by the vertical guide. The vertical guide preferably carries the grinding wheel motor together with the grinding wheel. The Longitudinal guide preferably carries the vertical guide and thus indirectly also the grinding wheel motor.
Die Vertikalführung umfasst bevorzugt einen zweiten Aktuator, durch welchen die Vertikalführung antreibbar ist. Somit kann die Schleifscheibe durch den Antrieb des zweiten Aktuators in vertikaler Richtung nach oben und unten verschoben werden. Die Vertikalführung erlaubt eine Verschiebung der rotierbaren Schleifscheibe von bevorzugt mindestens 200 mm.The vertical guide preferably includes a second actuator, by which the vertical guide can be driven. Thus, the grinding wheel can be shifted up and down in the vertical direction by driving the second actuator. The vertical guide allows the rotatable grinding wheel to be displaced by preferably at least 200 mm.
Bei bevorzugten Ausführungsformen umfasst die Rundschleifmaschine weiterhin einen Turm, welcher von der Längsführung getragen wird. Der Turm trägt die Vertikalführung, wobei die Vertikalführung bevorzugt in oder an dem Turm angeordnet ist. Die Vertikalführung trägt die Schleifscheibe; insbesondere den Schleifscheibenmotor mit der angekoppelten Schleifscheibenspindel und der darauf sitzenden Schleifscheibe. Der Turm ist bezogen auf die zweite Rotationsachse in axialer Richtung neben der Schleifscheibe angeordnet. Der Turm ist bezogen auf die erste Rotationsachse in axialer Richtung bevorzugt neben der Abrichteinheit angeordnet, wobei sich die Abrichteinheit zwischen dem Turm und dem Reitstock befindet.In preferred embodiments, the cylindrical grinder further includes a turret supported by the longitudinal guide. The tower carries the vertical guide, with the vertical guide preferably being arranged in or on the tower. The vertical guide carries the grinding wheel; in particular the grinding wheel motor with the coupled grinding wheel spindle and the grinding wheel sitting on it. The tower is arranged next to the grinding wheel in the axial direction in relation to the second axis of rotation. The tower is preferably arranged next to the dressing unit in the axial direction relative to the first axis of rotation, with the dressing unit being located between the tower and the tailstock.
Der Turm wird bevorzugt von den beiden Führungsschienen auf dem Hauptständer getragen und in diesen die Längsführung bildenden Führungsschienen geführt. Vorzugsweise wird der Turm entlang der Längsführung verschoben, um die Schleifscheibe zu verschieben.The tower is preferably carried by the two guide rails on the main stand and is guided in these guide rails, which form the longitudinal guide. Preferably, the tower is slid along the longitudinal guide to move the grinding wheel.
Der Turm weist bevorzugt eine mittlere Achse auf, welche vertikal ausgerichtet ist und bezogen auf die zweite Rotationsachse in axialer Richtung neben der Schleifscheibe angeordnet ist. Die mittlere Achse ist bezogen auf die erste Rotationsachse in axialer Richtung bevorzugt neben der Abrichteinheit angeordnet, wobei sich die Abrichteinheit zwischen der mittleren Achse und dem Reitstock befindet. Die mittlere Achse liegt bevorzugt in der die erste Rotationsachse und die zweite Rotationsachse umfassenden vertikalen Ebene.The turret preferably has a central axis which is vertically oriented and axially adjacent to the grinding wheel relative to the second axis of rotation is arranged. The central axis is preferably arranged next to the dressing unit in the axial direction relative to the first axis of rotation, the dressing unit being located between the central axis and the tailstock. The middle axis preferably lies in the vertical plane comprising the first axis of rotation and the second axis of rotation.
Der Werkstückspindelstock umfasst bevorzugt einen Werkstückmotor zum rotatorischen Antrieb des Werkstückes und eine Werkstückspindel. Der Werkstückspindelstock ist auf dem Schwenktisch verschiebbar und dort festlegbar.The work headstock preferably comprises a work piece motor for rotating the work piece and a work piece spindle. The workhead can be moved on the swivel table and fixed there.
Die Abrichteinheit umfasst bevorzugt mehrere unterschiedliche Abrichtwerkzeuge, welche in einer horizontalen Ebene nebeneinander angeordnet sind. Da die Abrichtwerkzeuge in einer horizontalen Richtung quer zur ersten Rotationsachse verschiebbar auf der Abrichteinheit gelagert sind, kann durch einen solchen Verschiebevorgang jeweils eines der Abrichtwerkzeuge zum Abrichten ausgewählt werden. Die mehreren Abrichtwerkzeuge sind bevorzugt in einer horizontalen Richtung quer zur ersten Rotationsachse nebeneinander angeordnet.The dressing unit preferably comprises a number of different dressing tools, which are arranged next to one another in a horizontal plane. Since the dressing tools are mounted on the dressing unit so that they can be displaced in a horizontal direction transversely to the first axis of rotation, one of the dressing tools can be selected for dressing in each case by such a displacement process. The plurality of dressing tools are preferably arranged next to one another in a horizontal direction transverse to the first axis of rotation.
Gemäß einer bevorzugten Ausführungsform umfasst die Abrichteinheit mindestens ein statisches Abrichtwerkzeug und mindestens ein dynamisches Abrichtwerkzeug, sodass unterschiedliche Abrichtvorgänge an der Schleifscheibe vorgenommen werden können.According to a preferred embodiment, the dressing unit comprises at least one static dressing tool and at least one dynamic dressing tool, so that different dressing processes can be carried out on the grinding wheel.
Bei bevorzugten Ausführungsformen ist der Schwenktisch an einem auf die erste Rotationsachse bezogenen axialen ersten Ende des Schwenktisches in einem Schwenklager gegenüber dem Maschinenbett schwenkbar gelagert. Ein vertikaler Abstand zwischen einem auf die erste Rotationsachse bezogenen axialen zweiten Ende des Schwenktisches und dem Maschinenbett ist durch ein Verstellelement definiert. Der vertikale Abstand zwischen dem auf die erste Rotationsachse bezogenen axialen zweiten Ende des Schwenktisches und dem Maschinenbett ist insbesondere durch eine verstellbare Länge des Verstellelementes definiert. Das Verstellelement ist bevorzugt durch eine Spindel gebildet. Das Verstellelement umfasst bevorzugt eine Grobeinstellung und eine Feineinstellung.In preferred embodiments, the pivoting table is pivotably mounted in a pivot bearing relative to the machine bed at an axial first end of the pivoting table relative to the first axis of rotation. A vertical distance between an axial one related to the first axis of rotation second end of the swivel table and the machine bed is defined by an adjustment element. The vertical distance between the axial second end of the swivel table, which is related to the first axis of rotation, and the machine bed is defined in particular by an adjustable length of the adjustment element. The adjusting element is preferably formed by a spindle. The adjusting element preferably includes a coarse adjustment and a fine adjustment.
Der Schwenktisch ist bevorzugt um mindestens ±5° gegenüber dem Maschinenbett schwenkbar.The swivel table can preferably be swiveled by at least ±5° in relation to the machine bed.
Bei bevorzugten Ausführungsformen umfasst das Maschinenbett eine Grundplatte, auf welcher die Abrichteinheit, das Schwenklager und das Verstellelement befestigt sind. Die Grundplatte besteht bevorzugt aus Stahlguss.In preferred embodiments, the machine bed includes a base plate on which the dressing unit, the pivot bearing and the adjustment element are attached. The base plate is preferably made of cast steel.
Weitere Einzelheiten und Weiterbildungen der Erfindung ergeben sich aus der nachfolgenden Beschreibung einer bevorzugten Ausführungsform der Erfindung, unter Bezugnahme auf die Zeichnung. Es zeigen:
- Fig. 1:
- eine Seitenansicht einer bevorzugten Ausführungsform einer erfindungsgemäßen Rundschleifmaschine;
- Fig. 2:
- eine perspektivische Ansicht der in
Fig. 1 gezeigten Rundschleifmaschine; - Fig. 3:
- eine Detailansicht der in
Fig. 1 gezeigten Rundschleifmaschine mit einem horizontal ausgerichteten Schwenktisch; - Fig. 4:
- eine Detailansicht der in
Fig. 1 gezeigten Rundschleifmaschine mit einem um -10° geneigten Schwenktisch; - Fig. 5:
- eine Detailansicht der in
Fig. 1 gezeigten Rundschleifmaschine mit einem um +6° geneigten Schwenktisch; - Fig. 6:
- eine Seitenansicht der in
Fig. 1 gezeigten Rundschleifmaschine während eines Abrichtvorganges; und - Fig. 7:
- eine Detailansicht der in
Fig. 1 gezeigten Rundschleifmaschine während eines Abrichtvorganges mit einem um -10° geneigten Schwenktisch.
- Figure 1:
- a side view of a preferred embodiment of a cylindrical grinding machine according to the invention;
- Figure 2:
- a perspective view of in
1 cylindrical grinding machine shown; - Figure 3:
- a detailed view of the in
1 shown cylindrical grinding machine with a horizontally aligned swivel table; - Figure 4:
- a detailed view of the in
1 Cylindrical grinding machine shown with a swivel table inclined by -10°; - Figure 5:
- a detailed view of the in
1 Cylindrical grinding machine shown with a swivel table inclined by +6°; - Figure 6:
- a side view of the in
1 Cylindrical grinding machine shown during a dressing process; and - Figure 7:
- a detailed view of the in
1 Cylindrical grinding machine shown during a dressing process with a swivel table inclined by -10°.
Auf dem Maschinenbett 03 ist ein Schwenktisch 07 angeordnet, auf welchem ein Werkstückspindelstock 08 zum rotatorischen Antrieb eines Werkstückes 09 (gezeigt in
Der Schwenktisch 07 kann gegenüber dem Maschinenbett 03 geneigt werden. Hierfür ist der Schwenktisch 07 einerseits über ein Schwenklager 13 mit dem Maschinenbett 03 und andererseits über ein Verstellelement 14 mit dem Maschinenbett 03 verbunden.The swivel table 07 can be tilted relative to the
Auf dem Maschinenbett 03 ist zudem eine Abrichteinheit 16 zum Abrichten der Schleifscheibe 06 angeordnet, welche sich bezogen auf die erste Rotationsachse axial neben dem Reitstock 11 befindet. Somit befindet sich die Abrichteinheit 16 zwischen dem Reitstock 11 und dem Turm 02. Die Abrichteinheit 16 ist in einer horizontalen Richtung quer zur ersten Rotationsachse verschiebbar auf dem Maschinenbett 03 gelagert.A
Der Schleifscheibenmotor treibt die Schleifscheibe 06 an, sodass diese um eine zweite Rotationsachse rotiert. Der Turm 02, die erste Rotationsachse und die zweite Rotationsachse liegen gemeinsam in einer vertikalen Ebene.The grinding wheel motor drives the grinding
Der Turm 02 wird über eine Längsführung 17 von dem Hauptständer 01 getragen. Die Längsführung 17 erlaubt eine Verschiebung des Turmes 02 axial in Richtung der zweiten Rotationsachse, d. h. in der die erste Rotationsachse und die zweite Rotationsachse umfassenden vertikalen Ebene. Durch das Verschieben des Turmes 02 mithilfe der Längsführung 17 wird auch die Schleifscheibe 06 in dieser Richtung verschoben.
In oder an dem Turm 02 ist eine Vertikalführung 18 (gezeigt in
- 0101
- Hauptständermain stand
- 0202
- TurmTower
- 0303
- Maschinenbettmachine bed
- 0404
- Schleifeinheit / SchleifspindelstockGrinding unit / grinding headstock
- 0505
- --
- 0606
- Schleifscheibegrinding wheel
- 0707
- Schwenktischswivel table
- 0808
- Werkstückspindelstockworkhead
- 0909
- Werkstückworkpiece
- 1010
- --
- 1111
- Reitstocktailstock
- 1212
- Werkstückmotorworkpiece motor
- 1313
- Schwenklagerswivel bearing
- 1414
- Verstellelementadjustment element
- 1515
- --
- 1616
- Abrichteinheitdressing unit
- 1717
- Längsführunglongitudinal guide
- 1818
- Vertikalführungvertical guidance
Claims (15)
- Cylindrical grinding machine for grinding a workpiece (09); comprising:- a machine bed (03), which supports a swivel table (07), on which a workpiece headstock (08) is arranged so as to be mountable fixedly for driving the workpiece (09) in rotating manner, and on which a tailstock (11) is mounted so as to be fixable, so that a first axis of rotation is defined by the workpiece headstock (08) and the tailstock (11), about which the workpiece (09) is rotatable, wherein the swivel table (07) can be swivelled opposite the machine bed (03) about a swivel axis aligned in a horizontal direction transversely to the first axis of rotation;- a grinding disc (06) which is rotatable about a second axis of rotation for grinding the workpiece (09), and- a longitudinal guide (17) for displacing the grinding disc (06) axially in the direction of the second axis of rotation; and- a dressing unit (16) for dressing the grinding disc (06),characterized in that, the first axis of rotation and the second axis of rotation are arranged together in the same vertical plane, wherein the second axis of rotation is arranged above the first axis of rotation; and that the longitudinal guide (17) is arranged in the vertical plane which comprises the first axis of rotation and the second axis of rotation; and that the dressing unit (16) is arranged on the machine bed (03) beside the tailstock (11) in the axial direction relative to the first axis of rotation.
- Cylindrical grinding machine according to Claim 1, characterized in that the second axis of rotation is aligned horizontally.
- Cylindrical grinding machine according to Claim 1 or 2, characterized in that the longitudinal guide (17) has a central guide axis, which is arranged in the vertical plane that comprises the first axis of rotation and the second axis of rotation.
- Cylindrical grinding machine according to any one of Claims 1 to 3, characterized in that it further comprises a grinding disc motor, which has a motor shaft, on which the grinding disc (06) is mounted, wherein the longitudinal guide (17) supports the grinding disc motor together with the grinding disc (06) .
- Cylindrical grinding machine according to any one of Claims 1 to 4, characterized in that it further comprises a vertical guide (18) for guiding the grinding disc (06) vertically, with which the grinding disc (06) can be guided to the workpiece (09).
- Cylindrical grinding machine according to Claim 5, characterized in that it further comprises a turret (02) which is supported by the longitudinal guide (17) and which supports the vertical guide (18), wherein the turret (02) is arranged in the vertical plane that comprises the first axis of rotation and the second axis of rotation.
- Cylindrical grinding machine according to Claim 6, characterized in that the turret (02) is arranged beside the dressing unit (16) in the axial direction relative to the first axis of rotation, wherein the dressing unit (16) is located between the turret (02) and the tailstock (11).
- Cylindrical grinding machine according to Claim 6 or 7, characterized in that the turret (02) has central axis, which is aligned vertically and is arranged beside the grinding disc (06) in the axial direction relative to the second axis of rotation.
- Cylindrical grinding machine according to any one of Claims 1 to 8, characterized in that the workpiece headstock (08) comprises a workpiece motor (12) for driving the workpiece (09) in rotating manner, wherein the workpiece motor (12) can be mounted fixedly on the swivel table (07).
- Cylindrical grinding machine according to any one of Claims 1 to 9, characterized in that the dressing unit (16) is mounted on the machine bed (03 and can be displaced in a horizontal direction transversely to the first axis of rotation.
- Cylindrical grinding machine according to any one of Claims 1 to 10, characterized in that the dressing unit (16) comprises multiple dressing tools, which are arranged side by side in a horizontal plane, wherein the dressing tools are mounted so as to be displaceable in a horizontal direction transversely to the first axis of rotation.
- Cylindrical grinding machine according to Claim 11, characterized in that the dressing unit (16) comprises at least one static dressing tool and at least one dynamic dressing tool.
- Cylindrical grinding machine according to any one of Claims 1 to 12, characterized in that the swivel table (07) is mounted in a swivel bearing (13) such that it can be swivelled opposite the machine bed (03) on an axial first end of the swivel table (07) relative to the first axis of rotation, wherein a vertical distance between an axial second end of the swivel table (07) relative to the first axis of rotation and the machine bed (03) is defined by an adjustment element (14).
- Cylindrical grinding machine according to Claim 13, characterized in that the machine bed (03) comprises a base plate, to which the dressing unit (16), the swivel bearing (13) and the adjustment element (14) are secured.
- Cylindrical grinding machine according to any one of Claims 1 to 14, characterized in that the swivel table (07) can be swivelled through at least ±5° relative to the machine bed (03).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020130004.2A DE102020130004A1 (en) | 2020-11-13 | 2020-11-13 | Cylindrical grinding machine with dressing unit |
PCT/EP2021/080709 WO2022101090A1 (en) | 2020-11-13 | 2021-11-05 | Circular grinding machine with dressing unit |
Publications (2)
Publication Number | Publication Date |
---|---|
EP4058237A1 EP4058237A1 (en) | 2022-09-21 |
EP4058237B1 true EP4058237B1 (en) | 2023-05-10 |
Family
ID=78695668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21810538.5A Active EP4058237B1 (en) | 2020-11-13 | 2021-11-05 | Circular grinding machine with dressing unit |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4058237B1 (en) |
DE (1) | DE102020130004A1 (en) |
WO (1) | WO2022101090A1 (en) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2842905A (en) | 1953-04-13 | 1958-07-15 | Carl G Rolin | Work holder |
DE1118646B (en) | 1959-05-11 | 1961-11-30 | Wilhelm Friedrich Munk | Additional device that can be placed on the clamping table of a surface grinding machine for circular and conical grinding of workpieces |
DE2204309A1 (en) | 1972-01-31 | 1973-08-16 | Salje Ernst | PROCESS AND DEVICE FOR CIRCULAR FLAT GRINDING OF WORK PIECES |
DE3136396A1 (en) | 1981-09-14 | 1983-03-24 | Werner Gerhard 6113 Babenhausen Lang | Planer-type grinding machine having one or more stands |
DE19514390C2 (en) * | 1995-04-19 | 1997-10-23 | Karl Heinz Giebmanns | Grinding machine |
TWM383466U (en) | 2010-03-02 | 2010-07-01 | Axisco Prec Machinery Co Ltd | High-efficiency fine & coarse grinding CNC dual-axes surface grinder |
DE102012010689A1 (en) * | 2012-05-30 | 2013-12-05 | Vollmer Werke Maschinenfabrik Gmbh | Device for sharpening tools with cutting edges, such as drills, milling cutters or the like |
DE102014102938A1 (en) | 2014-03-05 | 2015-09-10 | Haas Schleifmaschinen Gmbh | Processing machine, in particular grinding machine |
DE102014115149B3 (en) * | 2014-10-17 | 2016-01-21 | Schaudt Mikrosa Gmbh | Grinding machine, in particular compact designed centerless grinder |
CH713162B1 (en) | 2016-11-30 | 2020-07-15 | Florian Haenni | Grinding machine, in particular cylindrical grinding machine. |
-
2020
- 2020-11-13 DE DE102020130004.2A patent/DE102020130004A1/en active Pending
-
2021
- 2021-11-05 WO PCT/EP2021/080709 patent/WO2022101090A1/en unknown
- 2021-11-05 EP EP21810538.5A patent/EP4058237B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP4058237A1 (en) | 2022-09-21 |
WO2022101090A1 (en) | 2022-05-19 |
DE102020130004A1 (en) | 2022-05-19 |
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