EP3741508A1 - Centreless cylindrical grinding machine - Google Patents

Centreless cylindrical grinding machine Download PDF

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Publication number
EP3741508A1
EP3741508A1 EP19175307.8A EP19175307A EP3741508A1 EP 3741508 A1 EP3741508 A1 EP 3741508A1 EP 19175307 A EP19175307 A EP 19175307A EP 3741508 A1 EP3741508 A1 EP 3741508A1
Authority
EP
European Patent Office
Prior art keywords
area
machine bed
machine
cylindrical grinding
cover
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.)
Granted
Application number
EP19175307.8A
Other languages
German (de)
French (fr)
Other versions
EP3741508B1 (en
Inventor
Urs Tschudin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Publication date
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Application filed by Individual filed Critical Individual
Priority to ES19175307T priority Critical patent/ES2921074T3/en
Priority to PL19175307.8T priority patent/PL3741508T3/en
Priority to EP19175307.8A priority patent/EP3741508B1/en
Priority to US16/875,205 priority patent/US20200368872A1/en
Priority to JP2020086948A priority patent/JP7328932B2/en
Priority to KR1020200059844A priority patent/KR102609042B1/en
Priority to CN202010425748.1A priority patent/CN111958342B/en
Publication of EP3741508A1 publication Critical patent/EP3741508A1/en
Publication of EP3741508B1 publication Critical patent/EP3741508B1/en
Application granted granted Critical
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
    • B24B5/307—Means for supporting work
    • 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
    • B24B41/02—Frames; Beds; Carriages
    • 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
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • 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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/02—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables
    • 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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/12—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving optical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
    • B24B5/22—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work for grinding cylindrical surfaces, e.g. on bolts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
    • B24B5/30—Regulating-wheels; Equipment therefor
    • 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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/12—Dressing tools; Holders therefor
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel

Definitions

  • the present invention relates to a centerless cylindrical grinding machine for through-hole and plunge-cut grinding of any workpieces according to the preamble of claim 1, such as this for example in FIG EP 1 330 336 is described.
  • through-feed and plunge-cut grinding other terms such as through-feed or longitudinal grinding and cross-grinding are also used in the literature.
  • Centerless cylindrical grinding machines differ from other cylindrical grinding processes in that the workpiece to be processed is not clamped in a force-locking manner in the machine or a device, but rather rests loosely on a support (workpiece support). Centerless grinding enables higher manufacturing accuracy and higher productivity compared to other cylindrical grinding processes.
  • the EP 1 330 336 suggests a centerless cylindrical grinding machine with only three positioning axes. This makes it possible for the proposed Centerless cylindrical grinding machine with driven positioning axes X S (or U S ) and X R for adjusting the grinding headstock and the control headstock and another driven positioning axis Y W running at right angles to the axis X R for a carriage with a workpiece support on a carriage track, the carriage can be moved on the slide track into a position outside of a safety housing and the slide can optionally be equipped with an internally or externally acting dressing device.
  • the centerless cylindrical grinding machines known from the prior art have in common that the area of the machine bed in which the actual machining of a workpiece takes place is spaced for access beyond the area of the machine bed into which the slide track protrudes is, so the area of the machine bed into which the slide track protrudes must be overcome for access. This makes changing the grinding wheel and / or regulating wheel, as well as access to components located in this area in general, more difficult.
  • lateral access to the area of the machine bed into which the slide track protrudes is hindered by the extent of the extension, so that access is essentially restricted to frontal intervention regardless of further spatial boundary conditions.
  • the object of the present invention is, based on this prior art, to further develop a centerless cylindrical grinding machine in such a way that the accessibility of the area of the machine bed in which the grinding headstock and the control headstock are arranged and the area of the machine bed into which the slide track protrudes or is arranged at least in sections, is improved.
  • a generic centerless cylindrical grinding machine for through-hole and plunge-cut grinding of any workpieces with a first drivable positioning axis X S for a grinding headstock with a grinding wheel rotatable about an axis of rotation and a second drivable positioning axis X R for a control headstock with a Rotation axis rotatable regulating wheel as well as a workpiece support that can be arranged essentially between the grinding headstock and the regulating headstock, with a further drivable positioning axis Y W for a slide, which runs at right angles to at least one of the positioning axes X S and X R , is attached to a slide track over which the workpiece support can be moved, wherein the grinding headstock and the control headstock are arranged in a first area of a machine bed and the slide track at least in sections in a second area of the machine bed is arranged, and the second area of the machine bed in a direction parallel to the positioning
  • the positioning axis X S and the positioning axis X R run parallel to one another in many cases, the axis of rotation of the grinding wheel and the axis of rotation of the regulating wheel each being arranged at right angles to the respective positioning axes X S and X R.
  • the positioning axis X S can also be arranged inclined with respect to the positioning axis X R. Because of this inclination and the associated deviation of one associated with "X" In the coordinate direction, the positioning axis can also be referred to as positioning axis U S for better differentiation. For the sake of simplicity, however, both alignments are subsumed under the positioning axis X S.
  • the axis of rotation of the grinding wheel can be arranged at right angles to the positioning axis X S , but this is not mandatory.
  • the positioning axis Y W is arranged at right angles to one of the positioning axes X S or X R , preferably to the positioning axis X R.
  • a fundamental advantage here is that the smaller extension of the second area of the machine bed results in at least one free area through which, for example, better accessibility is made possible for an operator.
  • a projection is formed as the second area of the machine bed.
  • the slide track can only be located in this second area of the machine bed, provided that the slide attached to it with the workpiece support for the intended machining protrudes sufficiently into the machining area formed between the grinding wheel and the regulating wheel in an end position of movement.
  • the carriage path can also extend into the second area of the machine bed in order to lengthen the possible travel path, especially if the carriage with the workpiece support or the workpiece on the workpiece support does not protrude beyond the carriage path.
  • the slide track extends at least in sections, that is to say with its end facing away from the machining area, into the second area of the machine bed.
  • open spaces are preferably formed on both sides of the second area of the machine bed adjoining the first area of the machine bed.
  • the open spaces on both sides increase the accessibility, especially with regard to the grinding wheel and regulating wheel.
  • the second area of the machine bed preferably extends starting from the first area of the machine bed in a direction parallel to the positioning axis Y W at least over a length of the workpiece support in this direction.
  • the length of the slide path extending in the second area of the machine bed in the direction of the positioning axis Y W and thus the minimum length of the second area of the machine bed in this direction corresponds at least to the length by which the workpiece support can be moved completely out of the processing area. In this way, workpieces can be picked up and repositioned on the workpiece support without having to intervene in the machining area.
  • the extension of the second area of the machine bed parallel to at least one of the positioning axes X S and X R is essentially symmetrical, starting from a central axis of the slide track parallel to the positioning axis Y W.
  • This enables access that is balanced on both sides.
  • the equal accessibility on both sides increases the flexibility of the machine installation with regard to the given spatial boundary conditions and can offer ergonomic advantages for the operating personnel, since depending on the person a preferred side of operation, such as for left and right-handers, can be selected for access.
  • the term "essentially symmetrical" refers to the basic form of the second area of the machine bed, with minor contour deviations, such as a through a Switch panel formed projection or an undercut, are negligible with regard to the accessibility from both sides.
  • the centerless cylindrical grinding machine preferably comprises a movable, in particular pivotable, control panel which can be moved from a side of the second area of the machine bed running parallel to the positioning axis Y W to the other side.
  • the control panel can be moved to the side of the operator. If no operation via the control panel is provided, the operator can, for example, also move the panel out of his area of action so as not to be disturbed by the control panel.
  • the centerless cylindrical grinding machine comprises a first cover which can be moved from a loading position to a protective position and at least partially surrounds the second area of the machine bed starting from the first area of the machine bed in the protective position.
  • the first cover In a loading position, the first cover is in a position in which the cover releases the second area of the machine bed for positioning a workpiece on the workpiece support or at least expands the accessibility compared to a protective position.
  • the loading position is not limited to the positioning of workpieces on the workpiece support, but can also be used to remove the workpieces or to access components in the first area of the machine bed.
  • access to the second area of the machine bed is limited or completely prevented in a protective position of the first cover.
  • the cover does not have to be continuous, but can be formed from individual cover sections. It is possible here to limit the cost of materials by only providing the cover sections in critical safety zones, for example.
  • Cover sections or the first cover as a whole can also have a grid-like or cage-like shape. Individual cover sections can preferably be moved into a loading or protective position independently of one another. The movement of the first cover or individual cover sections can take place manually or driven, in particular automatically depending on the process status, for example automatic movement of the first cover into a loading position after the workpiece support has been moved from the processing area into the second area of the machine bed.
  • the first cover can be moved perpendicular to the surface formed by the second region of the machine bed.
  • the first cover can thereby be guided in a space-saving manner in the direction of the side walls that adjoin the machine bed and face the floor. It is particularly preferable for the first cover to be guided on the inside with respect to the side walls, that is to say designed to be at least partially sunk into them. This allows the first cover to be protected.
  • the side wall also serves to protect the operator by minimizing moving components in direct contact areas and the associated risk of collision and drawing-in.
  • the first cover is open at least in sections on a side facing away from the second area of the machine bed in the protective position.
  • an opening area opposite the surface formed by the second area of the machine bed is formed.
  • the structure of the first cover can hereby be simplified.
  • the opening range also offers a movement blockage of the first cover access options that can also be used for repairs in such a case, for example.
  • the opening area should preferably be in a position such as at a sufficient height to at least make access to hazardous areas more difficult or else to prevent it according to customary standards.
  • the first cover is preferably at least partially transparent at least in sections. This makes it possible to see at least partial areas of the second area of the machine bed and thus to make them accessible for visual control and / or to use optical components for monitoring, documentation or similar purposes, which are also protected by the first cover.
  • the centerless cylindrical grinding machine comprises a detection unit which detects whether a protected area is being accessed in a protective position of the first cover.
  • a corresponding detection signal can be used to generate a warning signal and / or to stop the machine in order to counter a hazardous situation.
  • the protected area monitored by the detection unit can be smaller than the area formed by the cover in the protected position.
  • the first cover can have a height by which access to a lower-lying hazard area is better impeded.
  • the protected area monitored by the detection unit is limited to the lower-lying hazard area.
  • the reaction to the detection signal can also be different depending on the definition of threshold values, so that, for example, when using a distance sensor, an acoustic and / or optical warning signal is initially output when a detection signal is present and when a critical distance is not reached the machine is stopped.
  • the centerless cylindrical grinding machine includes a 3D detection unit, which includes at least the area of the protective position of the machine bed. As soon as an object penetrates the scan area, a warning signal is generated and / or the machine is stopped in order to counter a dangerous situation.
  • the first cover In the loading position, the first cover preferably does not substantially protrude over the workpiece support. This enables largely free access to the workpiece support.
  • the term "essentially” is therefore to be understood in such a way that the first cover in the loading position does not form any interference contour for loading or removing workpieces that would affect the ergonomics of the operator or direct access via handling components such as gripping arms.
  • the centerless cylindrical grinding machine preferably comprises a second cover which can be moved from an access position into a protective position and which surrounds the first area of the machine bed at least in sections.
  • the components arranged in the first area of the machine bed such as the grinding headstock and the regulating headstock, are accessible, as is necessary, for example, for exchanging the grinding wheel or the regulating wheel.
  • the protective position of the second cover prevents or at least limits access to areas from which a hazard situation arises.
  • the first area of the machine bed is completely closed by the second cover in the protective position against access from the outside.
  • an opening remain in the second cover, which allows the movement of the slide or the workpiece support in and out of the processing area or from the first area to the second area and vice versa.
  • the opening is preferably as small as possible, that is to say in particular adapted to the dimensions of the workpieces that can be moved through the opening on the workpiece support located on the slide, in order to prevent other interventions or at least reduce corresponding possibilities.
  • the second cover is foldable. This enables a simple and robust construction of the second cover.
  • the first and the second cover do not have to be designed as separate covers.
  • the first cover can also form part of the second cover or vice versa.
  • embodiments of the first cover with the advantages mentioned can also be transferred to the second cover, and vice versa, regardless of the spatial assignment of the covers.
  • the second area of the machine bed can be moved into the first area of the machine bed.
  • the length of the projection formed by the second area of the machine bed can thus be adapted.
  • An unused length for example due to a shortened travel path of the slide for machining or due to non-use of the machine or at least the second area of the machine bed itself, can thus be provided for the provision of an open area.
  • the possibility of movement of the second area of the machine bed through the first area for the position-dependent formation of a protrusion on both sides can allow equipping from both sides.
  • the centerless cylindrical grinding machine 100 comprises a grinding wheel 11 on a grinding headstock 10 which is movable in a first driven positioning axis X S.
  • a regulating wheel 21 on a regulating headstock 20 can be moved in a second driven positioning axis X R.
  • the positioning axis X S runs parallel to the positioning axis X R.
  • the positioning axes X S and X R are arranged at right angles to the respective axes of rotation 12, 22 of the grinding wheel 11 and the regulating wheel 21.
  • a workpiece support 32 for a workpiece is arranged between the grinding headstock 10 and the control headstock 20.
  • the workpiece support 32 is located on a carriage 31 which can be moved in a carriage path 30 at right angles to the axes X S and X R in a driven positioning axis Y W. By means of the slide 31, the workpiece support 32 can be moved out of the danger area of the grinding wheel 11 and the regulating wheel 21.
  • a dressing device not shown here, which comprises at least one dressing tool for the grinding wheel 11 and / or regulating wheel 21, and / or a coolant supply can also be arranged on the slide 31.
  • the grinding headstock 10, the regulating headstock 20 and the slide 31 on the slide track 30 are preferably constructed on a machine bed 40, preferably made of thermally stable natural granite.
  • the grinding headstock 10 and the control headstock 20 are arranged in a first area 41 of the machine bed 40, while the slide track 30 is at least partially in a second area 42 of the Machine bed 40 protrudes.
  • the first area 41 and the second area 42 of the machine bed 40 are distinguishable in that the second area 42 of the machine bed 40 has a smaller extension than the first area 41 of the machine bed 40 in a direction parallel to the positioning axis Y W the second area 42 of the machine bed 40, starting from the first area 41 of the machine bed 40, has a projection extending in the direction of the positioning axis Y W.
  • the illustrated second area 42 of the machine bed 40 results in comparison to a centerless cylindrical grinding machine with a continuously wide machine bed, recesses on both sides which allow better access to the individual components of the machine.
  • the slide track 30 protrudes in the Figure 1 shown embodiment so far into the second area 42 of the machine bed 40, so that the slide 31 with the workpiece support 32 can be moved out of the machining area formed between the grinding wheel 11 and the regulating wheel 21.
  • a second cover 70 Figure 4
  • the slide 31 and / or the workpiece support 32 can preferably be moved via the slide track 30 into a position on the side of the second cover 70 facing away from the machining area.
  • the second area 42 of the machine bed 40 accordingly has a minimum length in the direction of the positioning axis Y W , which enables the carriage path 30 to be accommodated for the respectively required movement of the carriage 31 or the workpiece support 32.
  • An extension of the second area 42 of the machine bed 40 beyond the minimum length offers the possibility of using the area created by this for the arrangement of further components, such as the one in FIG Figure 2 shown pivotable control panel 50, and / or to use as a shelf.
  • control panel 50 supports the bilateral use of the open spaces offered by the second region 42 of the machine bed 40 due to the smaller extension.
  • the control panel 50 can be moved about the pivot axis 52 to the respective preferred side of the operator via the pivot arm 51.
  • control panel 50 can also be moved out of the action space provided for this purpose for setup or repair work.
  • first cover 60 In one embodiment of a first cover 60 according to FIG Figure 3 this is moved perpendicular to the surface formed by the machine bed 40.
  • the first cover 60 runs within the side walls of the second area 42 of the machine bed 40 and the side walls of the first area 41 of the machine bed 40 facing the second area 42 in the direction of the positioning axis YW Figure 3
  • the illustrated position of the first cover 60 corresponds to a protective position in which the possibility of access to the area enclosed by the first cover 60 is restricted.
  • the first cover 60 is open here in the protective position on a side facing away from the machine bed 40. In other words, a lateral protection is provided without the enclosed area being completely encapsulated.
  • the swivel arm 51 of the control panel 50 can be arranged in the second area 42 of the machine bed 40 within the first cover 60, the control panel 50 also being available when the first cover 60 is moved into a protective position.
  • targeted intervention by an operator during at least one accidental intervention is sufficiently prevented, and / or at least a visual control option is offered.
  • FIG Figure 4 a second cover 70 is also provided.
  • the first cover 60 is shown here in a loading position in which the first cover 60 has been moved completely into the machine bed 40. As a result, the first cover 60 does not form an interfering contour.
  • the second cover 70 is shown here in a protective position and is designed to be foldable about the first pivot axis 71 and the second pivot axis 72. In this position, the second cover 60 encloses the grinding headstock 10 with the grinding wheel 11 and the control headstock 20 with the control wheel 21 in the first area 41 of the machine bed 40 from two sides perpendicular to the surface formed by the machine bed 40, which is parallel to the positioning axes X S and X R extend, as well as a surface formed between these sides on a side facing away from the first region 41. Sections of the second cover 70 can also be formed by other system components, for example a rear wall on the side of the first area 41 of the machine bed 40 facing away from the second area 42.
  • the second cover 70 also has an opening 73 on the side surface facing the second region 42 of the machine bed. Through the opening 73, the slide 31 and the workpiece support 32 together with the workpiece can also be moved between the first area 41 and the second area 42 of the machine bed 40 when the second cover is in a protective position.
  • the opening 73 can be closable so that the opening 73 is only open for the movement of the carriage or the workpiece support through it.
  • FIG. 11 shows a perspective view of the machine bed 40, with the second region 42 of the machine bed 40 can be moved in and / or through the first region 41 of the machine bed 40 in a direction of movement 43 parallel to the positioning axis Y W.
  • the centerless cylindrical grinding machine 100 can also be designed such that the second area 42 with a corresponding movement does not form a rear projection.
  • the second area 42 can be shortened and / or the first area 41 can have a receptacle for the second area 42.
  • the invention is not restricted to the embodiments described. Even if the projection is shown here as a rectangle, the transition can, for example, have radii, taper, etc.
  • the control panel can be moved in a guide along the machine bed. If a swivel arm is provided, this can also come from above.

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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)

Abstract

Die Erfindung betrifft eine spitzenlose Rundschleifmaschine (100) für das Durchgangs- und das Einstechschleifen beliebiger Werkstücke mit einer ersten antreibbaren Positionierachse X<sub>S</sub> für einen Schleifspindelstock (10) mit einer um eine rotierbare Schleifscheibe (11) und einer zweiten antreibbaren Positionierachse X<sub>R</sub> für einen Regelspindelstock (20) mit einer rotierbaren Regelscheibe (21) sowie einer im Wesentlichen zwischen Schleifspindelstock (10) und Regelspindelstock (20) anordenbaren Werkstückauflage (32), wobei eine weitere antreibbare und rechtwinklig zu zumindest einer der Positionierachsen X<sub>S</sub> und X<sub>R</sub> verlaufende Positionierachse Y<sub>W</sub> für einen Schlitten (31) auf einer Schlittenbahn (30) angebracht ist, über die die Werkstückauflage (32) bewegbar ist. Der Schleifspindelstock (10) und der Regelspindelstock (20) sind in einem ersten Bereich (41) eines Maschinenbetts (40) angeordnet und die Schlittenbahn (30) ist zumindest abschnittsweise in einem zweiten Bereich (42) des Maschinenbetts (40) angeordnet, wobei der zweite Bereich (42) des Maschinenbetts (40) in einer Richtung parallel zu der Positionierachse Y<sub>W</sub> eine geringere Erstreckung aufweist als der erste Bereich (41) des Maschinenbetts (40).The invention relates to a centerless cylindrical grinding machine (100) for through-hole and plunge-cut grinding of any workpieces with a first drivable positioning axis X <sub> S </sub> for a grinding headstock (10) with a grinding wheel (11) that can rotate around a grinding wheel (11) and a second Drivable positioning axis X <sub> R </sub> for a control headstock (20) with a rotatable control wheel (21) and a workpiece support (32) that can be arranged essentially between the grinding headstock (10) and the control headstock (20), with another drivable and at right angles Positioning axis Y <sub> W </sub> extending to at least one of the positioning axes X <sub> S </sub> and X <sub> R </sub> for a slide (31) is attached to a slide track (30), over which the workpiece support (32) can be moved. The grinding headstock (10) and the control headstock (20) are arranged in a first area (41) of a machine bed (40) and the slide track (30) is arranged at least in sections in a second area (42) of the machine bed (40) The second area (42) of the machine bed (40) has a smaller extent in a direction parallel to the positioning axis Y <sub> W </sub> than the first area (41) of the machine bed (40).

Description

Die vorliegende Erfindung betrifft eine spitzenlose Rundschleifmaschine für das Durchgangs- und das Einstechschleifen beliebiger Werkstücke nach dem Oberbegriff des Anspruchs 1, wie diese zum Beispiel in der EP 1 330 336 beschrieben ist. Anstelle der Begriffe Durchgangs- und Einstechschleifen werden in der Literatur auch andere Begriffe wie Durchlauf- oder Längsschleifen und Querschleifen verwendet.The present invention relates to a centerless cylindrical grinding machine for through-hole and plunge-cut grinding of any workpieces according to the preamble of claim 1, such as this for example in FIG EP 1 330 336 is described. Instead of the terms through-feed and plunge-cut grinding, other terms such as through-feed or longitudinal grinding and cross-grinding are also used in the literature.

Spitzenlose Rundschleifmaschinen unterscheiden sich von den übrigen Rundschleifverfahren dadurch, dass das zu bearbeitende Werkstück nicht in der Maschine oder einer Einrichtung kraftschlüssig eingespannt ist, sondern lose auf einer Unterlage (Werkstückauflage) aufliegt. Das spitzenlose Schleifen ermöglicht gegenüber anderen Rundschleifverfahren eine höhere Fertigungsgenauigkeit und eine höhere Produktivität.Centerless cylindrical grinding machines differ from other cylindrical grinding processes in that the workpiece to be processed is not clamped in a force-locking manner in the machine or a device, but rather rests loosely on a support (workpiece support). Centerless grinding enables higher manufacturing accuracy and higher productivity compared to other cylindrical grinding processes.

Gängige Bauweisen spitzenloser Rundschleifmaschinen haben üblicherweise einen in einer Achse (XS) angetriebenen Schleifspindelstock mit einer Schleifscheibe sowie einen ebenfalls in einer Achse (XR) angetriebenen Regelscheibenspindelstock mit einer Regelscheibe. Zwischen den beiden Spindelstöcken ist die Werkstückauflage bzw. ein dazu dienender Auflagebock fest auf dem Maschinenbett fixiert. Abrichtvorrichtungen für die Schleifscheibe und die Regelscheibe sind in der Regel aussen angebracht und über weitere angetriebene Achsen (X' und Y' sowie und X'' und Y") relativ zu den jeweiligen Spindelstöcken bewegbar. Diese Bauweisen haben den Nachteil, dass eine grosse Anzahl - bis zu sechs - angetriebener Positionierungsachsen vorhanden ist, was diese Maschinen sehr verteuert.Common designs of centerless cylindrical grinding machines usually have a grinding headstock with a grinding wheel driven in one axis (X S ) and a regulating wheel headstock with a regulating wheel, also driven in an axis (X R ). The workpiece support or a support bracket used for this purpose is firmly fixed on the machine bed between the two headstocks. Dressing devices for the grinding wheel and the regulating wheel are usually attached to the outside and can be moved relative to the respective headstocks via further driven axes (X 'and Y' and X '' and Y "). These designs have the disadvantage that a large number - Up to six - driven positioning axes are available, which makes these machines very expensive.

Die EP 1 330 336 schlägt dem gegenüber eine spitzenlose Rundschleifmaschine mit nur drei Positionierachsen vor. Hierzu wird dadurch ermöglicht, dass bei der vorgeschlagenen spitzenlosen Rundschleifmaschine mit angetriebenen Positionierachsen XS (bzw. US) und XR zur Verstellung des Schleifspindelstock und des Regelspindelstockes und einer weiteren angetriebenen und rechtwinklig zu der Achse XR verlaufenden Positionierachse YW für einen Schlitten mit einer Werkstückauflage auf einer Schlittenbahn, der Schlitten auf der Schlittenbahn in eine ausserhalb eines Sicherheitsgehäuses liegende Position bewegbar ist und der Schlitten wahlweise mit einer innen- oder einer aussenwirkenden Abrichtvorrichtung bestückbar ist.The EP 1 330 336 suggests a centerless cylindrical grinding machine with only three positioning axes. This makes it possible for the proposed Centerless cylindrical grinding machine with driven positioning axes X S (or U S ) and X R for adjusting the grinding headstock and the control headstock and another driven positioning axis Y W running at right angles to the axis X R for a carriage with a workpiece support on a carriage track, the carriage can be moved on the slide track into a position outside of a safety housing and the slide can optionally be equipped with an internally or externally acting dressing device.

Unabhängig von der Anzahl der Positionierachsen ist den aus dem Stand der Technik bekannten spitzenlosen Rundschleifmaschinen jedoch gemein, dass der Bereich des Maschinenbetts, in dem die eigentliche Bearbeitung eines Werkstücks erfolgt, über den Bereich des Maschinenbetts, in den die Schlittenbahn hineinragt, für einen Zugriff distanziert wird, also für einen Zugriff der Bereich des Maschinenbetts, in den die Schlittenbahn hineinragt überwunden werden muss. Hierdurch wird ein Wechsel der Schleifscheibe und/oder Regelscheibe, wie auch der Zugriff auf in diesem Bereich befindliche Komponenten allgemein, erschwert. Gleichermassen wird aber auch ein seitlicher Zugriff auf den Bereich des Maschinenbetts, in den die Schlittenbahn hineinragt, durch das Ausmass der Erstreckung behindert, so dass sich ein Zugriff im Wesentlichen und ungeachtet weiterer räumlicher Randbedingungen auf einen Frontaleingriff beschränkt.Regardless of the number of positioning axes, the centerless cylindrical grinding machines known from the prior art have in common that the area of the machine bed in which the actual machining of a workpiece takes place is spaced for access beyond the area of the machine bed into which the slide track protrudes is, so the area of the machine bed into which the slide track protrudes must be overcome for access. This makes changing the grinding wheel and / or regulating wheel, as well as access to components located in this area in general, more difficult. At the same time, however, lateral access to the area of the machine bed into which the slide track protrudes is hindered by the extent of the extension, so that access is essentially restricted to frontal intervention regardless of further spatial boundary conditions.

Die Aufgabe der vorliegenden Erfindung ist es, ausgehend von diesem Stand der Technik, eine spitzenlose Rundschleifmaschine dahingehend weiterzuentwickeln, dass die Zugänglichkeit dem Bereich des Maschinenbetts, in dem der Schleifspindelstock und der Regelspindelstock angeordnet sind, und dem Bereich des Maschinenbetts, in den die Schlittenbahn hineinragt bzw. zumindest abschnittsweise angeordnet ist, verbessert wird.The object of the present invention is, based on this prior art, to further develop a centerless cylindrical grinding machine in such a way that the accessibility of the area of the machine bed in which the grinding headstock and the control headstock are arranged and the area of the machine bed into which the slide track protrudes or is arranged at least in sections, is improved.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.This object is achieved by the features of claim 1. Further advantageous configurations of the invention emerge from the subclaims.

Erfindungsgemäss ist vorgesehen, dass bei einer gattungsgemässen spitzenlosen Rundschleifmaschine für das Durchgangs- und das Einstechschleifen beliebiger Werkstücke mit einer ersten antreibbaren Positionierachse XS für einen Schleifspindelstock mit einer um eine Rotationsachse rotierbaren Schleifscheibe und einer zweiten antreibbaren Positionierachse XR für einen Regelspindelstock mit einer um eine Rotationsachse rotierbaren Regelscheibe sowie einer im Wesentlichen zwischen Schleifspindelstock und Regelspindelstock anordenbare Werkstückauflage, wobei eine weitere antreibbare und rechtwinklig zu zumindest einer der Positionierachsen XS und XR verlaufende Positionierachse YW für einen Schlitten auf einer Schlittenbahn angebracht ist, über die die Werkstückauflage bewegbar ist, wobei der Schleifspindelstock und der Regelspindelstock in einem ersten Bereich eines Maschinenbetts angeordnet sind und die Schlittenbahn zumindest abschnittsweise in einem zweiten Bereich des Maschinenbetts angeordnet ist, und der zweite Bereich des Maschinenbetts in einer Richtung parallel zu der Positionierachse YW eine geringere Erstreckung aufweist als der erste Bereich des Maschinenbetts.According to the invention, it is provided that in a generic centerless cylindrical grinding machine for through-hole and plunge-cut grinding of any workpieces with a first drivable positioning axis X S for a grinding headstock with a grinding wheel rotatable about an axis of rotation and a second drivable positioning axis X R for a control headstock with a Rotation axis rotatable regulating wheel as well as a workpiece support that can be arranged essentially between the grinding headstock and the regulating headstock, with a further drivable positioning axis Y W for a slide, which runs at right angles to at least one of the positioning axes X S and X R , is attached to a slide track over which the workpiece support can be moved, wherein the grinding headstock and the control headstock are arranged in a first area of a machine bed and the slide track at least in sections in a second area of the machine bed is arranged, and the second area of the machine bed in a direction parallel to the positioning axis Y W has a smaller extent than the first area of the machine bed.

Die Positionierachse XS und die Positionierachse XR verlaufen in vielen Fällen parallel zueinander, wobei die Rotationsachse der Schleifscheibe und die Rotationsachse der Regelscheibe jeweils rechtwinklig zu den jeweiligen Positionierachsen XS und XR angeordnet sind. Alternativ hierzu kann die die Positionierachse XS bezüglich der Positionierachse XR aber auch geneigt angeordnet sein. Aufgrund dieser Neigung und der damit verbundenen Abweichung einer mit "X" assoziierten Koordinatenrichtung kann die Positionierachse auch zur besseren Unterscheidbarkeit als Positionierachse US bezeichnet werden. Zur Vereinfachung werden jedoch beide Ausrichtungen unter der Positionierachse XS subsummiert. Bei der Neigung der Positionierachse XS bezüglich der Positionierachse XR kann die Rotationsachse der Schleifscheibe rechtwinklig zur Positionierachse XS angeordnet sein, was jedoch nicht zwingend ist. Die Positionierachse YW ist aber in einem solchen Fall zu einer der Positionierachsen XS oder XR, bevorzugt zur Positionierachse XR, rechtwinklig angeordnet.The positioning axis X S and the positioning axis X R run parallel to one another in many cases, the axis of rotation of the grinding wheel and the axis of rotation of the regulating wheel each being arranged at right angles to the respective positioning axes X S and X R. As an alternative to this, however, the positioning axis X S can also be arranged inclined with respect to the positioning axis X R. Because of this inclination and the associated deviation of one associated with "X" In the coordinate direction, the positioning axis can also be referred to as positioning axis U S for better differentiation. For the sake of simplicity, however, both alignments are subsumed under the positioning axis X S. In the case of the inclination of the positioning axis X S with respect to the positioning axis XR, the axis of rotation of the grinding wheel can be arranged at right angles to the positioning axis X S , but this is not mandatory. In such a case, however, the positioning axis Y W is arranged at right angles to one of the positioning axes X S or X R , preferably to the positioning axis X R.

Ein grundsätzlicher Vorteil besteht dabei darin, dass sich durch die geringere Erstreckung des zweiten Bereichs des Maschinenbetts zumindest eine Freifläche ergibt, durch die beispielsweise einem Bediener eine bessere Zugänglichkeit ermöglicht wird. Mit anderen Worten bildet sich ausgehend von dem ersten Bereich des Maschinenbetts in Richtung der Positionierachse YW ein Vorsprung als zweiter Bereich des Maschinenbetts aus.A fundamental advantage here is that the smaller extension of the second area of the machine bed results in at least one free area through which, for example, better accessibility is made possible for an operator. In other words, starting from the first area of the machine bed in the direction of the positioning axis Y W, a projection is formed as the second area of the machine bed.

Die Schlittenbahn kann sich lediglich in diesem zweiten Bereich des Maschinenbetts befinden, sofern der darauf angebrachte Schlitten mit der Werkstückauflage für die vorgesehene Bearbeitung über diese ausreichend in den zwischen der Schleifscheibe und der Regelscheibe gebildeten Bearbeitungsbereich in einer Bewegungsendposition hinausragt. Alternativ kann sich die Schlittenbahn aber auch in den zweiten Bereich des Maschinenbetts erstrecken, um den möglichen Verfahrweg zu verlängern, insbesondere, wenn der darauf angebrachte Schlitten mit der Werkstückauflage bzw. das auf der Werkstückauflage befindliche Werkstück nicht über die Schlittenbahn hinausragt. In diesem Fall erstreckt sich die Schlittenbahn aber zumindest abschnittsweise, also mit ihrem dem Bearbeitungsbereich abgewandten Ende, in den zweiten Bereich des Maschinenbetts.The slide track can only be located in this second area of the machine bed, provided that the slide attached to it with the workpiece support for the intended machining protrudes sufficiently into the machining area formed between the grinding wheel and the regulating wheel in an end position of movement. Alternatively, the carriage path can also extend into the second area of the machine bed in order to lengthen the possible travel path, especially if the carriage with the workpiece support or the workpiece on the workpiece support does not protrude beyond the carriage path. In this case, however, the slide track extends at least in sections, that is to say with its end facing away from the machining area, into the second area of the machine bed.

Vorzugsweise bilden sich durch die geringere Erstreckung zu beiden sich dem ersten Bereich des Maschinenbetts anschließenden Seiten des zweiten Bereichs des Maschinenbetts Freiflächen. Durch beiderseitige Freiflächen wird die Zugänglichkeit insbesondere im Hinblick auf die Schleifscheibe und Regelscheibe erhöht.As a result of the smaller extension, open spaces are preferably formed on both sides of the second area of the machine bed adjoining the first area of the machine bed. The open spaces on both sides increase the accessibility, especially with regard to the grinding wheel and regulating wheel.

Bevorzugt erstreckt sich der zweite Bereich des Maschinenbetts ausgehend vom ersten Bereich des Maschinenbetts in einer Richtung parallel zur Positionierachse YW zumindest über eine Länge der Werkstückauflage in dieser Richtung. Die Länge der sich in dem zweiten Bereich des Maschinenbetts erstreckenden Schlittenbahn in Richtung der Positionierachse YW und damit die minimale Länge des zweiten Bereichs des Maschinenbetts in dieser Richtung entspricht somit zumindest der Länge, durch die die Werkstückauflage vollständig aus dem Bearbeitungsbereich bewegt werden kann. Somit können Werkstücke genommen und wieder auf der Werkstückauflage positioniert werden, ohne dass in den Bearbeitungsbereich eingegriffen werden muss.The second area of the machine bed preferably extends starting from the first area of the machine bed in a direction parallel to the positioning axis Y W at least over a length of the workpiece support in this direction. The length of the slide path extending in the second area of the machine bed in the direction of the positioning axis Y W and thus the minimum length of the second area of the machine bed in this direction corresponds at least to the length by which the workpiece support can be moved completely out of the processing area. In this way, workpieces can be picked up and repositioned on the workpiece support without having to intervene in the machining area.

In einer Ausgestaltung der Erfindung ist die Erstreckung des zweiten Bereichs des Maschinenbetts parallel zu zumindest einer der Positionierachsen XS und XR ausgehend von einer zur Positionierachse YW parallelen Mittelachse der Schlittenbahn im Wesentlichen symmetrisch. Hierdurch wird eine beidseitig ausgeglichene Zugänglichkeit ermöglicht. Die beidseitige gleichermassen gegebenen Zugänglichkeit erhöht die Flexibilität der Maschinenaufstellung bezüglich gegebener räumlicher Randbedingungen und kann bezogen auf das Bedienpersonal ergonomische Vorteile bieten, da je nach Person eine Vorzugsseite der Bedienung, wie beispielsweise bei Links- und Rechtshändern, bei einen Zugriff gewählt werden kann. Der Begriff "im Wesentlichen symmetrisch" bezieht sich dabei auf die Grundausprägung des zweiten Bereichs des Maschinenbetts, wobei kleinere Konturabweichungen, wie beispielsweise ein durch ein Schaltpanel gebildeter Vorsprung oder eine Hinterschneidung, im Hinblick auf die beidseitige Zugänglichkeit vernachlässigbar sind.In one embodiment of the invention, the extension of the second area of the machine bed parallel to at least one of the positioning axes X S and X R is essentially symmetrical, starting from a central axis of the slide track parallel to the positioning axis Y W. This enables access that is balanced on both sides. The equal accessibility on both sides increases the flexibility of the machine installation with regard to the given spatial boundary conditions and can offer ergonomic advantages for the operating personnel, since depending on the person a preferred side of operation, such as for left and right-handers, can be selected for access. The term "essentially symmetrical" refers to the basic form of the second area of the machine bed, with minor contour deviations, such as a through a Switch panel formed projection or an undercut, are negligible with regard to the accessibility from both sides.

Bevorzugt umfasst die spitzenlose Rundschleifmaschine ein bewegliches, insbesondere verschwenkbares, Bedienpanel, das von einer parallel zur Positionierachse YW verlaufenden Seite des zweiten Bereichs des Maschinenbetts zur jeweils anderen Seite bewegbar ist. Hierdurch ist es möglich, dass das Bedienpanel flexibel anordenbar ist. Das Bedienpanel kann dabei auf die Seite des Bedieners bewegt werden. Wenn keine Bedienung über das Bedienpanel vorgesehen wird, kann der Bediener das Panel aber beispielsweise auch aus seinem Aktionsbereich hinausbewegen, um nicht durch das Bedienpanel gestört zu werden.The centerless cylindrical grinding machine preferably comprises a movable, in particular pivotable, control panel which can be moved from a side of the second area of the machine bed running parallel to the positioning axis Y W to the other side. This makes it possible for the control panel to be flexibly arranged. The control panel can be moved to the side of the operator. If no operation via the control panel is provided, the operator can, for example, also move the panel out of his area of action so as not to be disturbed by the control panel.

In einer Weiterbildung der Erfindung umfasst die spitzenlose Rundschleifmaschine eine erste Abdeckung, die von einer Beladeposition in eine Schutzposition bewegbar ist und den zweiten Bereich des Maschinenbetts ausgehend vom ersten Bereich des Maschinenbetts in der Schutzposition zumindest abschnittsweise umgibt.In a further development of the invention, the centerless cylindrical grinding machine comprises a first cover which can be moved from a loading position to a protective position and at least partially surrounds the second area of the machine bed starting from the first area of the machine bed in the protective position.

In einer Beladeposition befindet sich die erste Abdeckung in einer Position, in der die Abdeckung den zweiten Bereich des Maschinenbetts zur Positionierung eines Werkstücks auf der Werkstückauflage freigibt oder zumindest die Zugriffsmöglichkeit gegenüber einer Schutzposition erweitert. Die Beladeposition ist in Ihrer Anwendung nicht auf die Positionierung von Werkstücken auf der Werkstückauflage beschränkt, sondern kann gleichermassen für eine Entnahme der Werkstücke oder den Zugriff auf Komponenten im ersten Bereich des Maschinenbetts genutzt werden. Im Gegensatz zur Beladeposition wird ein Zugriff auf den zweiten Bereich des Maschinenbetts in einer Schutzposition der ersten Abdeckung limitiert oder gänzlich verhindert.In a loading position, the first cover is in a position in which the cover releases the second area of the machine bed for positioning a workpiece on the workpiece support or at least expands the accessibility compared to a protective position. In your application, the loading position is not limited to the positioning of workpieces on the workpiece support, but can also be used to remove the workpieces or to access components in the first area of the machine bed. In contrast to the loading position, access to the second area of the machine bed is limited or completely prevented in a protective position of the first cover.

Die Abdeckung muss nicht durchgängig ausgebildet sein, sondern kann aus einzelnen Abdeckungsabschnitten gebildet werden. Hierbei besteht die Möglichkeit, den Materialaufwand zu begrenzen, indem die Abdeckungsabschnitte zum Beispiel nur in kritischen Sicherheitszonen vorgesehen werden. Auch können Abdeckungsabschnitte oder die erste Abdeckung insgesamt eine gitter- oder käfigartige Ausprägung aufweisen. Bevorzugt können einzelne Abdeckungsabschnitte unabhängig voneinander in eine Belade- oder Schutzposition bewegt werden. Die Bewegung der ersten Abdeckung oder einzelner Abdeckungsabschnitte kann manuell oder angetrieben, insbesondere automatisch in Abhängigkeit des Prozessstatus erfolgen, beispielsweise automatisches Bewegen der ersten Abdeckung in eine Beladeposition, nachdem die Werkstückauflage aus dem Bearbeitungsbereich in den zweiten Bereich des Maschinenbetts verfahren wurde.The cover does not have to be continuous, but can be formed from individual cover sections. It is possible here to limit the cost of materials by only providing the cover sections in critical safety zones, for example. Cover sections or the first cover as a whole can also have a grid-like or cage-like shape. Individual cover sections can preferably be moved into a loading or protective position independently of one another. The movement of the first cover or individual cover sections can take place manually or driven, in particular automatically depending on the process status, for example automatic movement of the first cover into a loading position after the workpiece support has been moved from the processing area into the second area of the machine bed.

Insbesondere ist die erste Abdeckung senkrecht zu der durch den zweiten Bereich des Maschinenbetts gebildeten Fläche bewegbar. Die erste Abdeckung kann hierdurch in platzsparender Weise in Richtung der sich an das Maschinenbett anschliessenden, zum Boden weisenden Seitenwandungen geführt werden. Besonders bevorzugt wird die erste Abdeckung in Bezug auf die Seitenwandungen innen geführt, also als zumindest partiell in diese versenkbar ausgestaltet. Hierdurch kann die erste Abdeckung geschützt werden. Zudem dient die Seitenwandung auch dem Schutz des Bedieners durch Minimierung beweglicher Komponenten in direkten Kontaktbereichen und der damit einhergehenden Kollisions- und Einzugsgefahr.In particular, the first cover can be moved perpendicular to the surface formed by the second region of the machine bed. The first cover can thereby be guided in a space-saving manner in the direction of the side walls that adjoin the machine bed and face the floor. It is particularly preferable for the first cover to be guided on the inside with respect to the side walls, that is to say designed to be at least partially sunk into them. This allows the first cover to be protected. In addition, the side wall also serves to protect the operator by minimizing moving components in direct contact areas and the associated risk of collision and drawing-in.

In einer Ausgestaltung ist die erste Abdeckung zumindest abschnittsweise auf einer dem zweiten Bereich des Maschinenbetts abgewandten Seite in der Schutzposition offen. Mit anderen Worten wird ein der durch den zweiten Bereich des Maschinenbetts gebildeten Fläche gegenüberliegender Öffnungsbereich ausgebildet. Hierdurch kann der Aufbau der ersten Abdeckung vereinfacht werden. Der Öffnungsbereich bietet aber auch bei einer Bewegungsblockierung der ersten Abdeckung Zugriffsmöglichkeiten, die beispielsweise in einem solchen Fall auch zur Reparatur genutzt werden können. Der Öffnungsbereich sollte sich vorzugsweise jedoch in einer Position, wie in einer ausreichenden Höhe befinden, um den Zugriff zu Gefährdungsbereichen zumindest zu erschweren oder aber auch nach üblichen Massstäben zu verhindern.In one embodiment, the first cover is open at least in sections on a side facing away from the second area of the machine bed in the protective position. In other words, an opening area opposite the surface formed by the second area of the machine bed is formed. The structure of the first cover can hereby be simplified. The opening range also offers a movement blockage of the first cover access options that can also be used for repairs in such a case, for example. However, the opening area should preferably be in a position such as at a sufficient height to at least make access to hazardous areas more difficult or else to prevent it according to customary standards.

Bevorzugt ist die erste Abdeckung zumindest abschnittsweise zumindest teiltransparent. Hierdurch ist es möglich, zumindest Teilbereiche des zweiten Bereichs des Maschinebetts einzusehen und somit einer visuellen Kontrolle zugänglich zu machen und/oder optische Komponenten zur Überwachung, Dokumentation oder ähnlichen Zwecken einzusetzen, die ebenfalls durch die erste Abdeckung geschützt sind.The first cover is preferably at least partially transparent at least in sections. This makes it possible to see at least partial areas of the second area of the machine bed and thus to make them accessible for visual control and / or to use optical components for monitoring, documentation or similar purposes, which are also protected by the first cover.

In einer Weiterbildung umfasst die spitzenlose Rundschleifmaschine eine Detektionseinheit, die detektiert, ob in einer Schutzposition der ersten Abdeckung ein Eingriff in einen Schutzbereich erfolgt. Ein entsprechendes Detektionssignal kann dazu genutzt werden, ein Warnsignal zu generieren und/oder die Maschine anzuhalten, um einer Gefährdungslage zu begegnen. Der durch die Detektionseinheit überwachte Schutzbereich kann kleiner sein als der von der Abdeckung in der Schutzposition gebildete Bereich. Beispielsweise kann die erste Abdeckung eine Höhe aufweisen, durch die der Zugriff auf einen tiefer liegenden Gefährdungsbereich besser behindert wird. Der durch die Detektionseinheit überwachte Schutzbereich beschränkt sich in diesem Beispiel exemplarisch lediglich auf den tiefer liegenden Gefährdungsbereich. Auch kann die Reaktion auf das Detektionssignal je nach Festlegung von Schwellwerten unterschiedlich ausfallen, so dass beispielsweise bei Verwendung eines Abstandssensors zunächst mit Vorliegen eines Detektionssignals ein akustisches und/oder optisches Warnsignal ausgegeben wird und bei Unterschreiten eines kritischen Abstands die Maschine angehalten wird.In a further development, the centerless cylindrical grinding machine comprises a detection unit which detects whether a protected area is being accessed in a protective position of the first cover. A corresponding detection signal can be used to generate a warning signal and / or to stop the machine in order to counter a hazardous situation. The protected area monitored by the detection unit can be smaller than the area formed by the cover in the protected position. For example, the first cover can have a height by which access to a lower-lying hazard area is better impeded. In this example, the protected area monitored by the detection unit is limited to the lower-lying hazard area. The reaction to the detection signal can also be different depending on the definition of threshold values, so that, for example, when using a distance sensor, an acoustic and / or optical warning signal is initially output when a detection signal is present and when a critical distance is not reached the machine is stopped.

In einer Weiterbildung umfasst die spitzenlose Rundschleifmaschine eine 3D-Detektionseinheit, welche mindestens den Bereich der Schutzposition des Maschinenbettes umfasst. Sobald ein Objekt in den Scanbereich eindringt, wird ein Warnsignal generiert und/oder die Maschine wird angehalten, um einer Gefährdungslage zu begegnen.In a further development, the centerless cylindrical grinding machine includes a 3D detection unit, which includes at least the area of the protective position of the machine bed. As soon as an object penetrates the scan area, a warning signal is generated and / or the machine is stopped in order to counter a dangerous situation.

Vorzugsweise ragt die erste Abdeckung in der Beladeposition im Wesentlichen nicht über die Werkstückauflage. Hierdurch wird ein weitestgehend freier Zugang zur Werkstückauflage ermöglicht. Der Begriff "im Wesentlichen" ist demnach so zu verstehen, dass durch die erste Abdeckung in der Beladeposition keine die Ergonomie des Bedieners oder den direkten Zugriff über Handhabungskomponenten, wie Greifarme, beeinflussende Störkontur für die Beladung mit oder die Entnahme von Werkstücken gebildet wird.In the loading position, the first cover preferably does not substantially protrude over the workpiece support. This enables largely free access to the workpiece support. The term "essentially" is therefore to be understood in such a way that the first cover in the loading position does not form any interference contour for loading or removing workpieces that would affect the ergonomics of the operator or direct access via handling components such as gripping arms.

Bevorzugt umfasst die spitzenlose Rundschleifmaschine eine zweite Abdeckung, die von einer Zugriffsposition in eine Schutzposition bewegbar ist und den ersten Bereich des Maschinenbetts zumindest abschnittsweise umgibt. In der Zugriffsposition sind die im ersten Bereich des Maschinenbetts angeordneten Komponenten, wie der Schleifspindelstock und der Regelspindelstock, zugänglich, wie dies beispielsweise für den Austausch der Schleifscheibe oder der Regelscheibe erforderlich ist. Die Schutzposition der zweiten Abdeckung verhindert oder beschränkt zumindest den Zugriff auf Bereiche, aus dem sich eine Gefährdungslage ergibt.The centerless cylindrical grinding machine preferably comprises a second cover which can be moved from an access position into a protective position and which surrounds the first area of the machine bed at least in sections. In the access position, the components arranged in the first area of the machine bed, such as the grinding headstock and the regulating headstock, are accessible, as is necessary, for example, for exchanging the grinding wheel or the regulating wheel. The protective position of the second cover prevents or at least limits access to areas from which a hazard situation arises.

Insbesondere wird der erste Bereich des Maschinenbetts von der zweiten Abdeckung in der Schutzposition gegen einen Zugriff von aussen vollständig geschlossen. In einer Variante kann in der Schutzposition im Bereich des Übergangs zwischen dem ersten Bereich des Maschinenbetts und dem zweiten Bereich des Maschinenbetts eine Öffnung in der zweiten Abdeckung verbleiben, die die Bewegung des Schlittens bzw. der Werkstückauflage in den und aus dem Bearbeitungsbereich bzw. von dem ersten Bereich in den zweiten Bereich und umgekehrt ermöglicht. Die Öffnung ist vorzugsweise so klein wie möglich, also insbesondere den Dimensionen der durch die Öffnung bewegbaren Werkstücke auf der auf dem Schlitten befindlichen Werkstückauflage angepasst, um anderweitige Eingriffe zu verhindern oder entsprechende Möglichkeiten zumindest zu reduzieren.In particular, the first area of the machine bed is completely closed by the second cover in the protective position against access from the outside. In one variant, in the protective position in the area of the transition between the first area of the machine bed and the second area of the Machine bed an opening remain in the second cover, which allows the movement of the slide or the workpiece support in and out of the processing area or from the first area to the second area and vice versa. The opening is preferably as small as possible, that is to say in particular adapted to the dimensions of the workpieces that can be moved through the opening on the workpiece support located on the slide, in order to prevent other interventions or at least reduce corresponding possibilities.

In einer Ausgestaltung der Erfindung ist die zweite Abdeckung faltbar. Hierdurch wird ein einfacher und robuster Aufbau der zweiten Abdeckung ermöglicht.In one embodiment of the invention, the second cover is foldable. This enables a simple and robust construction of the second cover.

Die erste und die zweite Abdeckung müssen nicht als separate Abdeckungen ausgebildet sein. Alternativ kann die erste Abdeckung auch einen Teil der zweiten Abdeckung bilden oder umgekehrt. Entsprechend sind Ausführungsformen der ersten Abdeckung mit den dazu genannten Vorteilen ungeachtet der räumlichen Zuordnung der Abdeckungen auch auf die zweite Abdeckung übertragbar und umgekehrt.The first and the second cover do not have to be designed as separate covers. Alternatively, the first cover can also form part of the second cover or vice versa. Correspondingly, embodiments of the first cover with the advantages mentioned can also be transferred to the second cover, and vice versa, regardless of the spatial assignment of the covers.

In einer Weiterbildung der Erfindung ist der zweite Bereich des Maschinenbetts in den ersten Bereich des Maschinenbetts bewegbar. Somit kann die Länge des durch den zweiten Bereich des Maschinenbetts gebildeten Vorsprungs angepasst werden. Eine ungenutzte Länge, beispielsweise aufgrund eines für eine Bearbeitung verkürzten Verfahrwegs des Schlittens oder durch Nichtnutzung der Maschine oder zumindest des zweiten Bereichs des Maschinenbetts an sich, kann somit für die Bereitstellung einer Freifläche vorgesehen werden. Zudem kann eine Bewegungsmöglichkeit des zweiten Bereichs des Maschinenbetts durch den ersten Bereich zur positionsabhängigen beiderseitigen Ausbildung eines Vorsprungs eine Bestückung von beiden Seiten erlauben.In a further development of the invention, the second area of the machine bed can be moved into the first area of the machine bed. The length of the projection formed by the second area of the machine bed can thus be adapted. An unused length, for example due to a shortened travel path of the slide for machining or due to non-use of the machine or at least the second area of the machine bed itself, can thus be provided for the provision of an open area. In addition, the possibility of movement of the second area of the machine bed through the first area for the position-dependent formation of a protrusion on both sides can allow equipping from both sides.

Merkmale und Zweckmässigkeiten der Erfindung werden nachfolgend auch anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnungen beschrieben.Features and expediencies of the invention are also described below on the basis of exemplary embodiments with reference to the drawings.

Es zeigt

Figur 1 :
Eine perspektivische Ansicht der spitzenlosen Rundschleifmaschine von schräg oben mit Darstellung der Bearbeitungs- und Positionierelemente sowie der Aufteilung des Maschinenbetts in einen ersten und zweiten Bereich;
Figur 2 :
Eine perspektivische Ansicht der spitzenlosen Rundschleifmaschine von schräg oben mit Darstellung eines verschwenkbaren Bedienpanels als eine Ausführungsform eines beweglichen Bedienpanels;
Figur 3 :
Eine perspektivische Ansicht der spitzenlosen Rundschleifmaschine von schräg oben mit Darstellung einer im Maschinenbett geführten ersten Abdeckung als eine Ausführungsform einer ersten Abdeckung, die senkrecht zu der durch den zweiten Bereich des Maschinenbetts gebildeten Fläche bewegbar ist;
Figur 4 :
Eine perspektivische Ansicht der spitzenlosen Rundschleifmaschine von schräg oben mit Darstellung einer zweiten Abdeckung als eine Ausführungsform einer zweiten Abdeckung, die von einer Zugriffsposition in eine Schutzposition bewegbar ist und den ersten Bereich des Maschinenbetts zumindest abschnittsweise umgibt;
Figur 5 :
Eine perspektivische Ansicht der spitzenlosen Rundschleifmaschine von schräg oben mit Darstellung einer Ausführungsform, bei der der zweite Bereich des Maschinenbetts in den ersten Bereich des Maschinenbetts bewegbar ist.
It shows
Figure 1:
A perspective view of the centerless cylindrical grinding machine from above, showing the processing and positioning elements and the division of the machine bed into a first and second area;
Figure 2:
A perspective view of the centerless cylindrical grinding machine from obliquely above with a representation of a pivotable control panel as an embodiment of a movable control panel;
Figure 3:
A perspective view of the centerless cylindrical grinding machine obliquely from above, showing a first cover guided in the machine bed as an embodiment of a first cover which can be moved perpendicular to the surface formed by the second area of the machine bed;
Figure 4:
A perspective view of the centerless cylindrical grinding machine obliquely from above, showing a second cover as an embodiment of a second cover which can be moved from an access position into a protective position and at least partially surrounds the first area of the machine bed;
Figure 5:
A perspective view of the centerless cylindrical grinding machine obliquely from above showing an embodiment in which the second area of the machine bed can be moved into the first area of the machine bed.

Die Figuren zeigen jeweils die für die beschriebenen Sachverhalte wesentlichen Komponenten. Zu Gunsten der Übersichtlichkeit werden bereits anderweitig gezeigte Komponenten nicht zwingend erneut dargestellt, auch wenn diese von eine spitzenlosen Rundschleifmaschine umfasst sind oder zumindest umfasst sein können.The figures each show the components essential for the facts described. For the sake of clarity, components that have already been shown elsewhere are not necessarily shown again, even if they are or can at least be included in a centerless cylindrical grinding machine.

Die spitzenlose Rundschleifmaschine 100 gemäss Figur 1 umfasst eine Schleifscheibe 11 auf einem Schleifspindelstock 10 die in einer ersten angetriebenen Positionierachse XS bewegbar ist. Eine Regelscheibe 21 auf einem Regelspindelstock 20 ist in einer zweiten angetriebenen Positionierachse XR bewegbar. Die Positionierachse XS verläuft dabei parallel zur Positionierachse XR. Die Positionierachsen XS und XR sind rechtwinklig zu den jeweiligen Rotationsachsen 12, 22 der Schleifscheibe 11 und der Regelscheibe 21 angeordnet. Zwischen dem Schleifspindelstock 10 und dem Regelspindelstock 20 ist eine Werkstückauflage 32 für ein Werkstück angeordnet. Die Werkstückauflage 32 befindet sich auf einem Schlitten 31 der in einer Schlittenbahn 30 rechtwinklig zu den Achsen XS und XR in einer angetriebenen Positionierachse YW bewegbar ist. Mittels des Schlittens 31 lässt sich die Werkstückauflage 32 aus dem Gefahrenbereich der Schleifscheibe 11 und der Regelscheibe 21 bewegen. Auf dem Schlitten 31 kann bzw. können zudem eine hier nicht gezeigte Abrichtvorrichtung, die zumindest ein Abrichtwerkzeug für die Schleifscheibe 11 und/oder Regelscheibe 21 umfasst, und/oder eine Kühlmittelzuführung angeordnet sein.The centerless cylindrical grinding machine 100 according to Figure 1 comprises a grinding wheel 11 on a grinding headstock 10 which is movable in a first driven positioning axis X S. A regulating wheel 21 on a regulating headstock 20 can be moved in a second driven positioning axis X R. The positioning axis X S runs parallel to the positioning axis X R. The positioning axes X S and X R are arranged at right angles to the respective axes of rotation 12, 22 of the grinding wheel 11 and the regulating wheel 21. A workpiece support 32 for a workpiece is arranged between the grinding headstock 10 and the control headstock 20. The workpiece support 32 is located on a carriage 31 which can be moved in a carriage path 30 at right angles to the axes X S and X R in a driven positioning axis Y W. By means of the slide 31, the workpiece support 32 can be moved out of the danger area of the grinding wheel 11 and the regulating wheel 21. A dressing device, not shown here, which comprises at least one dressing tool for the grinding wheel 11 and / or regulating wheel 21, and / or a coolant supply can also be arranged on the slide 31.

Der Schleifspindelstock 10, der Regelspindelstock 20 sowie der Schlitten 31 auf der Schlittenbahn 30 sind vorzugsweise auf einem Maschinenbett 40, bevorzugt aus thermostabilem Natur-Granit, aufgebaut. Der Schleifspindelstock 10 und der Regelspindelstock 20 sind dabei in einem ersten Bereich 41 des Maschinenbetts 40 angeordnet, während die Schlittenbahn 30 zumindest abschnittsweise in einen zweiten Bereich 42 des Maschinenbetts 40 hineinragt. Der erste Bereich 41 und der zweite Bereich 42 des Maschinenbetts 40 sind dadurch unterscheidbar, dass der zweite Bereich 42 des Maschinenbetts 40 in einer Richtung parallel zu der Positionierachse YW eine geringere Erstreckung aufweist als der erste Bereich 41 des Maschinenbetts 40. Mit anderen Worten bildet der zweite Bereich 42 des Maschinenbetts 40 ausgehend von dem ersten Bereich 41 des Maschinenbetts 40 einen sich in Richtung der Positionierachse YW erstreckenden Vorsprung aus. Durch den in Figur 1 dargestellten zweiten Bereich 42 des Maschinenbetts 40 ergeben sich im Vergleich zu einer spitzenlosen Rundschleifmaschine mit einem durchgängig breiten Maschinenbett beidseitige Freisparungen, die einen besseren Zugang zu den einzelnen Komponenten der Maschine ermöglichen.The grinding headstock 10, the regulating headstock 20 and the slide 31 on the slide track 30 are preferably constructed on a machine bed 40, preferably made of thermally stable natural granite. The grinding headstock 10 and the control headstock 20 are arranged in a first area 41 of the machine bed 40, while the slide track 30 is at least partially in a second area 42 of the Machine bed 40 protrudes. The first area 41 and the second area 42 of the machine bed 40 are distinguishable in that the second area 42 of the machine bed 40 has a smaller extension than the first area 41 of the machine bed 40 in a direction parallel to the positioning axis Y W the second area 42 of the machine bed 40, starting from the first area 41 of the machine bed 40, has a projection extending in the direction of the positioning axis Y W. The in Figure 1 The illustrated second area 42 of the machine bed 40 results in comparison to a centerless cylindrical grinding machine with a continuously wide machine bed, recesses on both sides which allow better access to the individual components of the machine.

Die Schlittenbahn 30 ragt in der in Figur 1 gezeigten Ausgestaltung soweit in den zweiten Bereich 42 des Maschinenbetts 40, so dass der Schlitten 31 mit der Werkstückauflage 32 aus dem zwischen der Schleifscheibe 11 und der Regelscheibe 21 gebildeten Bearbeitungsbereich hinausgefahren werden kann. Bei Verwendung einer zweiten Abdeckung 70 (Figur 4) kann der Schlitten 31 und/oder die Werkstückauflage 32 über die Schlittenbahn 30 bevorzugt in eine Position auf der Bearbeitungsbereich abgewandten Seite der zweiten Abdeckung 70 bewegt werden. Der zweite Bereich 42 des Maschinenbetts 40 weist demnach eine Mindestlänge in Richtung der Positionierachse YW auf, die eine Aufnahme der Schlittenbahn 30 für die jeweils geforderte Bewegung des Schlittens 31 bzw. der Werkstückauflage 32 ermöglicht. Eine Erstreckung des zweiten Bereichs 42 des Maschinenbetts 40 über die Mindestlänge hinaus, bietet die Möglichkeit, die hierüber geschaffene Fläche zur Anordnung weiterer Komponenten, wie beispielsweise des in Figur 2 dargestellten verschwenkbaren Bedienpanels 50, und/oder als Ablage zu nutzen.The slide track 30 protrudes in the Figure 1 shown embodiment so far into the second area 42 of the machine bed 40, so that the slide 31 with the workpiece support 32 can be moved out of the machining area formed between the grinding wheel 11 and the regulating wheel 21. When using a second cover 70 ( Figure 4 ) the slide 31 and / or the workpiece support 32 can preferably be moved via the slide track 30 into a position on the side of the second cover 70 facing away from the machining area. The second area 42 of the machine bed 40 accordingly has a minimum length in the direction of the positioning axis Y W , which enables the carriage path 30 to be accommodated for the respectively required movement of the carriage 31 or the workpiece support 32. An extension of the second area 42 of the machine bed 40 beyond the minimum length offers the possibility of using the area created by this for the arrangement of further components, such as the one in FIG Figure 2 shown pivotable control panel 50, and / or to use as a shelf.

Durch die in Bezug auf die Mittelachse 33 der Schlittenbahn 30 in paralleler Richtung zu den Positionierachsen XS und XR symmetrischen Erstreckung des zweiten Bereichs 42 des Maschinenbetts 40 ergibt sich eine von beiden Seiten gleichermassen gute Zugänglichkeit, so dass ein Bediener hier bezüglich seiner Vorzugsrichtung für eine Bedienung oder einen Zugriff seine Position frei wählen kann.With respect to the central axis 33 of the slide track 30 in a direction parallel to the positioning axes X S and X R symmetrical extension of the second region 42 of the machine bed 40 results in equally good accessibility from both sides, so that an operator can freely choose his position here with regard to his preferred direction for operation or access.

Die in Figur 2 gezeigte Anordnung eines beweglichen Bedienpanels 50 unterstützt die beidseitige Nutzung der durch den zweiten Bereich 42 des Maschinenbetts 40 aufgrund der geringeren Erstreckung gebotenen Freiflächen. Für Bedienvorgänge kann das Bedienpanel 50 über den Schwenkarm 51 um die Schwenkachse 52 auf die jeweilige Vorzugsseite des Bedieners bewegt werden. Zudem kann das Bedienpanel 50 aber auch für Rüst- oder Reparaturarbeiten aus dem hierfür vorgesehenen Aktionsraum bewegt werden.In the Figure 2 The illustrated arrangement of a movable control panel 50 supports the bilateral use of the open spaces offered by the second region 42 of the machine bed 40 due to the smaller extension. For operating processes, the control panel 50 can be moved about the pivot axis 52 to the respective preferred side of the operator via the pivot arm 51. In addition, the control panel 50 can also be moved out of the action space provided for this purpose for setup or repair work.

In einer Ausgestaltung einer ersten Abdeckung 60 gemäss Figur 3 wird diese senkrecht zu der durch das Maschinenbett 40 gebildeten Fläche bewegt. Die erste Abdeckung 60 verläuft innerhalb der Seitenwandungen des zweiten Bereichs 42 des Maschinenbetts 40 und der in Richtung der Positionierachse YW dem zweiten Bereich 42 zugewandten Seitenwandungen des ersten Bereichs 41 des Maschinenbetts 40. Die in Figur 3 dargestellte Position der ersten Abdeckung 60 entspricht einer Schutzposition, in der die Zugriffmöglichkeit in den von der ersten Abdeckung 60 umfassten Bereich beschränkt wird. Die erste Abdeckung 60 ist hier auf einer dem Maschinenbett 40 abgewandten Seite in der Schutzposition offen. Mit anderen Worten wird ein seitlicher Schutz vorgesehen, ohne dass der umfasste Bereich vollständig gekapselt ist. Hierdurch kann beispielsweise der Schwenkarm 51 des Bedienpanels 50 im zweiten Bereich 42 des Maschinenbetts 40 innerhalb der ersten Abdeckung 60 angeordnet werden, wobei das Bedienpanel 50 auch dann verfügbar ist, wenn die erste Abdeckung 60 in eine Schutzposition gefahren wird. Je nach Höhe der ersten Abdeckung in einer Schutzposition kann zudem noch ein gezielter Eingriff durch einen Bediener, während zumindest ein versehentlicher Eingriff ausreichend verhindert wird, und/oder zumindest eine visuelle Kontrollmöglichkeit geboten werden.In one embodiment of a first cover 60 according to FIG Figure 3 this is moved perpendicular to the surface formed by the machine bed 40. The first cover 60 runs within the side walls of the second area 42 of the machine bed 40 and the side walls of the first area 41 of the machine bed 40 facing the second area 42 in the direction of the positioning axis YW Figure 3 The illustrated position of the first cover 60 corresponds to a protective position in which the possibility of access to the area enclosed by the first cover 60 is restricted. The first cover 60 is open here in the protective position on a side facing away from the machine bed 40. In other words, a lateral protection is provided without the enclosed area being completely encapsulated. In this way, for example, the swivel arm 51 of the control panel 50 can be arranged in the second area 42 of the machine bed 40 within the first cover 60, the control panel 50 also being available when the first cover 60 is moved into a protective position. Depending on the height of the first cover in a protective position, targeted intervention by an operator during at least one accidental intervention is sufficiently prevented, and / or at least a visual control option is offered.

Neben der ersten Abdeckung 60 ist in Figur 4 auch eine zweite Abdeckung 70 vorgesehen. Die erste Abdeckung 60 ist hier in einer Beladeposition gezeigt, in der die erste Abdeckung 60 vollständig in das Maschinenbetts 40 bewegt wurde. Hierdurch bildet die erste Abdeckung 60 keine Störkontur aus.In addition to the first cover 60, FIG Figure 4 a second cover 70 is also provided. The first cover 60 is shown here in a loading position in which the first cover 60 has been moved completely into the machine bed 40. As a result, the first cover 60 does not form an interfering contour.

Die zweite Abdeckung 70 ist hier in einer Schutzposition gezeigt und faltbar um die erste Schwenkachse 71 und die zweite Schwenkachse 72 ausgeführt. Die zweite Abdeckung 60 umschliesst in dieser Position den Schleifspindelstock 10 mit der Schleifscheibe 11 und den Regelspindelstock 20 mit der Regelscheibe 21 im ersten Bereich 41 des Maschinenbetts 40 von zwei Seiten senkrecht zu der durch das Maschinenbett 40 gebildeten Fläche, die sich parallel zu den Positionierachsen XS und XR erstrecken, sowie einer zwischen diesen Seiten gebildeten Fläche auf einer dem ersten Bereich 41 abgewandten Seite. Abschnitte der zweiten Abdeckung 70 können auch durch andere Anlagenkomponenten gebildet werden, beispielsweise eine Rückwand auf der dem zweiten Bereich 42 abgewandten Seite des ersten Bereichs 41 des Maschinenbetts 40.The second cover 70 is shown here in a protective position and is designed to be foldable about the first pivot axis 71 and the second pivot axis 72. In this position, the second cover 60 encloses the grinding headstock 10 with the grinding wheel 11 and the control headstock 20 with the control wheel 21 in the first area 41 of the machine bed 40 from two sides perpendicular to the surface formed by the machine bed 40, which is parallel to the positioning axes X S and X R extend, as well as a surface formed between these sides on a side facing away from the first region 41. Sections of the second cover 70 can also be formed by other system components, for example a rear wall on the side of the first area 41 of the machine bed 40 facing away from the second area 42.

Die zweite Abdeckung 70 weist zudem einen Öffnung 73 auf der dem zweiten Bereich 42 des Maschinenbetts zugewandten Seitenfläche auf. Durch die Öffnung 73 können der Schlitten 31 und die Werkstückauflage 32 nebst Werkstück auch zwischen dem ersten Bereich 41 und dem zweiten Bereich 42 des Maschinenbetts 40 bewegt werden, wenn sich die zweite Abdeckung in einer Schutzposition befindet. Die Öffnung 73 kann verschliessbar sein, so dass die Öffnung 73 nur zur Bewegung des Schlittens bzw. der Werkstückauflage durch diese hindurch geöffnet ist.The second cover 70 also has an opening 73 on the side surface facing the second region 42 of the machine bed. Through the opening 73, the slide 31 and the workpiece support 32 together with the workpiece can also be moved between the first area 41 and the second area 42 of the machine bed 40 when the second cover is in a protective position. The opening 73 can be closable so that the opening 73 is only open for the movement of the carriage or the workpiece support through it.

Figur 5 zeigt eine perspektivische Ansicht des Maschinenbetts 40, wobei der zweite Bereich 42 des Maschinenbetts 40 in und/oder durch den ersten Bereich 41 des Maschinenbetts 40 in einer Bewegungsrichtung 43 parallel zur Positionierachse YW bewegbar ist. Auch wenn die Darstellung auf eine Bewegung des zweiten Bereichs 42 durch den ersten Bereich 41 in der Bewegungsrichtung 43 auf den zweiten Bereich zu in einem rückwärtigen Vorsprung gerichtet ist, kann die spitzenlose Rundschleifmaschine 100 auch derart ausgebildet sein, dass der zweite Bereich 42 bei entsprechender Bewegung keinen rückwärtigen Vorsprung bildet. Hierzu kann der zweite Bereich 42 verkürzt sein und/oder der erste Bereich 41 eine Aufnahme für den zweiten Bereich 42 aufweisen. Figure 5 FIG. 11 shows a perspective view of the machine bed 40, with the second region 42 of the machine bed 40 can be moved in and / or through the first region 41 of the machine bed 40 in a direction of movement 43 parallel to the positioning axis Y W. Even if the illustration is directed towards a movement of the second area 42 through the first area 41 in the direction of movement 43 towards the second area in a rearward projection, the centerless cylindrical grinding machine 100 can also be designed such that the second area 42 with a corresponding movement does not form a rear projection. For this purpose, the second area 42 can be shortened and / or the first area 41 can have a receptacle for the second area 42.

Die Erfindung ist nicht auf die beschriebenen Ausführungsformen beschränkt. Auch wenn der Vorsprung hier als Rechteck gezeigt wird, kann der Übergang beispielsweise Radien aufweisen, sich verjüngen, etc. Das Bedienpanel kann alternativ zur Verwendung eines um eine Schwenkachse verschwenkbaren Schwenkarms in einer Führung entlang des Maschinenbetts bewegt werden. Bei Vorsehung eines Schwenkarms kann dieser auch von oben kommend ausgeführt werden.The invention is not restricted to the embodiments described. Even if the projection is shown here as a rectangle, the transition can, for example, have radii, taper, etc. As an alternative to using a swivel arm pivotable about a pivot axis, the control panel can be moved in a guide along the machine bed. If a swivel arm is provided, this can also come from above.

Claims (15)

Spitzenlose Rundschleifmaschine (100) für das Durchgangs- und das Einstechschleifen beliebiger Werkstücke mit einer ersten antreibbaren Positionierachse XS für einen Schleifspindelstock (10) mit einer um eine Rotationsachse (12) rotierbaren Schleifscheibe (11) und einer zweiten antreibbaren Positionierachse XR für einen Regelspindelstock (20) mit einer um eine Rotationsachse (22) rotierbaren Regelscheibe (21) sowie einer im Wesentlichen zwischen Schleifspindelstock (10) und Regelspindelstock (20) anordenbaren Werkstückauflage (32), wobei eine weitere antreibbare und rechtwinklig zu zumindest einer der Positionierachsen XS und XR verlaufende Positionierachse YW für einen Schlitten (31) auf einer Schlittenbahn (30) angebracht ist, über die die Werkstückauflage (32) bewegbar ist, wobei der Schleifspindelstock (10) und der Regelspindelstock (20) in einem ersten Bereich (41) eines Maschinenbetts (40) angeordnet sind und die Schlittenbahn (30) zumindest abschnittsweise in einem zweiten Bereich (42) des Maschinenbetts (40) angeordnet ist, dadurch gekennzeichnet, dass der zweite Bereich (42) des Maschinenbetts (40) in einer Richtung parallel zu der Positionierachse YW eine geringere Erstreckung aufweist als der erste Bereich (41) des Maschinenbetts (40).Centerless cylindrical grinding machine (100) for through-feed and plunge-cut grinding of any workpieces with a first drivable positioning axis X S for a grinding headstock (10) with a grinding wheel (11) that can be rotated about a rotational axis (12) and a second drivable positioning axis X R for a control headstock (20) with a regulating wheel (21) rotatable about an axis of rotation (22) and a workpiece support (32) which can be arranged essentially between the grinding headstock (10) and the regulating headstock (20), with another drivable and at right angles to at least one of the positioning axes X S and X R running positioning axis Y W for a slide (31) is attached to a slide track (30), over which the workpiece support (32) can be moved, the grinding headstock (10) and the control headstock (20) in a first area (41) a machine bed (40) are arranged and the slide track (30) at least in sections in a second Area (42) of the machine bed (40) is arranged, characterized in that the second area (42) of the machine bed (40) has a smaller extent in a direction parallel to the positioning axis Y W than the first area (41) of the machine bed ( 40). Spitzenlose Rundschleifmaschine (100) nach Anspruch 1, wobei sich durch die geringere Erstreckung zu beiden sich dem ersten Bereich (41) des Maschinenbetts (40) anschließenden Seiten des zweiten Bereichs (42) des Maschinenbetts (40) Freiflächen gebildet werden.Centerless cylindrical grinding machine (100) according to claim 1, whereby open spaces are formed by the smaller extension on both sides of the second area (42) of the machine bed (40) adjoining the first area (41) of the machine bed (40). Spitzenlose Rundschleifmaschine (100) nach Anspruch 1 oder 2, wobei sich der zweite Bereich (42) des Maschinenbetts (40) ausgehend vom ersten Bereich (41) des Maschinenbetts (40) in einer Richtung parallel zur Positionierachse YW zumindest über eine Länge der Werkstückauflage (32) in dieser Richtung erstreckt.Centerless cylindrical grinding machine (100) according to claim 1 or 2, wherein the second area (42) of the machine bed (40) extends from the first area (41) of the machine bed (40) into a direction parallel to the positioning axis Y W extends at least over a length of the workpiece support (32) in this direction. Spitzenlose Rundschleifmaschine (100) nach einem der Ansprüche 1 bis 3, wobei die Erstreckung des zweiten Bereichs (42) des Maschinenbetts (40) parallel zu zumindest einer der Positionierachsen XS und XR ausgehend von einer zur Positionierachse YW parallelen Mittelachse (33) der Schlittenbahn (30) im Wesentlichen symmetrisch ist.Centerless cylindrical grinding machine (100) according to one of Claims 1 to 3, the extension of the second region (42) of the machine bed (40) parallel to at least one of the positioning axes X S and X R starting from a central axis (33) parallel to the positioning axis Y W the slide track (30) is essentially symmetrical. Spitzenlose Rundschleifmaschine (100) nach einem der Ansprüche 1 bis 4, wobei die spitzenlose Rundschleifmaschine (100) ein bewegliches, insbesondere verschwenkbares, Bedienpanel (50) umfasst, das von einer parallel zur Positionierachse YW verlaufenden Seite des zweiten Bereichs (42) des Maschinenbetts (40) zur jeweils anderen Seite bewegbar ist.Centerless cylindrical grinding machine (100) according to one of claims 1 to 4, wherein the centerless cylindrical grinding machine (100) comprises a movable, in particular pivotable, control panel (50) which extends from a side of the second area (42) of the machine bed running parallel to the positioning axis Y W (40) is movable to the other side. Spitzenlose Rundschleifmaschine (100) nach einem der Ansprüche 1 bis 5, wobei die spitzenlose Rundschleifmaschine (100) eine erste Abdeckung (60) umfasst, die von einer Beladeposition in eine Schutzposition bewegbar ist und den zweiten Bereich (42) des Maschinenbetts (40) ausgehend vom ersten Bereich (41) des Maschinenbetts (40) in der Schutzposition zumindest abschnittsweise umgibt.Centerless cylindrical grinding machine (100) according to one of Claims 1 to 5, the centerless cylindrical grinding machine (100) comprising a first cover (60) which can be moved from a loading position to a protective position and starting from the second area (42) of the machine bed (40) from the first area (41) of the machine bed (40) in the protective position at least in sections. Spitzenlose Rundschleifmaschine (100) nach Anspruch 6, wobei die erste Abdeckung (60) senkrecht zu der durch den zweiten Bereich (42) des Maschinenbetts (40) gebildeten Fläche bewegbar ist.Centerless cylindrical grinding machine (100) according to Claim 6, the first cover (60) being movable perpendicular to the surface formed by the second region (42) of the machine bed (40). Spitzenlose Rundschleifmaschine (100) nach Anspruch 6 oder 7, wobei die erste Abdeckung (60) zumindest abschnittsweise auf einer dem zweiten Bereich (42) des Maschinenbetts (40) abgewandten Seite in der Schutzposition offen ist.Centerless cylindrical grinding machine (100) according to Claim 6 or 7, the first cover (60) being open at least in sections on a side facing away from the second area (42) of the machine bed (40) in the protective position. Spitzenlose Rundschleifmaschine (100) nach einem der Ansprüche 6 bis 8, wobei die erste Abdeckung (60) zumindest abschnittsweise zumindest teiltransparent ist.Centerless cylindrical grinding machine (100) according to one of Claims 6 to 8, the first cover (60) being at least partially transparent at least in sections. Spitzenlose Rundschleifmaschine (100) nach einem der Ansprüche 6 bis 9, wobei die spitzenlose Rundschleifmaschine (100) eine Detektionseinheit umfasst, die detektiert, ob in einer Schutzposition der ersten Abdeckung (60) ein Eingriff in einen Schutzbereich erfolgt.Centerless cylindrical grinding machine (100) according to one of Claims 6 to 9, the centerless cylindrical grinding machine (100) comprising a detection unit which detects whether a protected area is being accessed in a protective position of the first cover (60). Spitzenlose Rundschleifmaschine (100) nach einem der Ansprüche 1 bis 5, wobei die spitzenlose Rundschleifmaschine (100) einen 3D-Scanner umfasst, welcher mindestens den zweiten Bereich (42) des Maschinenbetts (40) als Scanbereich abdeckt und detektiert, ob ein Eingriff in den Scanbereich erfolgt.Centerless cylindrical grinding machine (100) according to one of claims 1 to 5, wherein the centerless cylindrical grinding machine (100) comprises a 3D scanner which covers at least the second area (42) of the machine bed (40) as a scanning area and detects whether an intervention in the Scanning area takes place. Spitzenlose Rundschleifmaschine (100) nach einem der Ansprüche 6 bis 11, wobei die erste Abdeckung (60) in der Beladeposition im Wesentlichen nicht über die Werkstückauflage (32) ragt.Centerless cylindrical grinding machine (100) according to one of Claims 6 to 11, the first cover (60) essentially not protruding over the workpiece support (32) in the loading position. Spitzenlose Rundschleifmaschine (100) nach einem der Ansprüche 1 bis 12, wobei die spitzenlose Rundschleifmaschine (100) eine zweite Abdeckung (70) umfasst, die von einer Zugriffsposition in eine Schutzposition bewegbar ist und den ersten Bereich (41) des Maschinenbetts (40) zumindest abschnittsweise umgibt.Centerless cylindrical grinding machine (100) according to one of claims 1 to 12, wherein the centerless cylindrical grinding machine (100) comprises a second cover (70) which can be moved from an access position into a protective position and at least the first area (41) of the machine bed (40) surrounds in sections. Spitzenlose Rundschleifmaschine (100) nach Anspruch 13, wobei die zweite Abdeckung (70) faltbar ist.The cylindrical centerless grinder (100) of claim 13, wherein the second cover (70) is foldable. Spitzenlose Rundschleifmaschine (100) nach einem der Ansprüche 1 bis 14, wobei der zweite Bereich (42) des Maschinenbetts (40) in den ersten Bereich (41) des Maschinenbetts (40) bewegbar ist.Centerless cylindrical grinding machine (100) according to one of Claims 1 to 14, the second area (42) of the machine bed (40) being movable into the first area (41) of the machine bed (40).
EP19175307.8A 2019-05-20 2019-05-20 Centreless cylindrical grinding machine Active EP3741508B1 (en)

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Application Number Priority Date Filing Date Title
ES19175307T ES2921074T3 (en) 2019-05-20 2019-05-20 Centerless Cylindrical Grinding Machine
PL19175307.8T PL3741508T3 (en) 2019-05-20 2019-05-20 Centreless cylindrical grinding machine
EP19175307.8A EP3741508B1 (en) 2019-05-20 2019-05-20 Centreless cylindrical grinding machine
US16/875,205 US20200368872A1 (en) 2019-05-20 2020-05-15 Centerless cylindrical grinding machine
JP2020086948A JP7328932B2 (en) 2019-05-20 2020-05-18 Centerless cylindrical grinding machine
KR1020200059844A KR102609042B1 (en) 2019-05-20 2020-05-19 Centerless cylindrical grinding machine
CN202010425748.1A CN111958342B (en) 2019-05-20 2020-05-19 Centerless cylindrical grinder

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KR102609042B1 (en) 2023-12-04
CN111958342B (en) 2022-07-08
KR20200134167A (en) 2020-12-01
PL3741508T3 (en) 2022-08-16
ES2921074T3 (en) 2022-08-17
EP3741508B1 (en) 2022-04-06
US20200368872A1 (en) 2020-11-26
CN111958342A (en) 2020-11-20
JP7328932B2 (en) 2023-08-17
JP2020189399A (en) 2020-11-26

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