• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Described is an apparatus (160) for selectively providing a first or at least a second tool for a lathe, comprising: a first (100a) and at least a second tool providing system (100b, 100c, 100d), each having: a Retaining element (101) which is adapted to hold the respective tool (165) for machining a workpiece by means of the lathe; and a rod (113) mechanically connected to the support member (101) for selectively displacing the respective held tool (165) when the rod (113) is driven to a working position or a waiting position.
    公开号:AT517010A2
    申请号:T50196/2016
    申请日:2016-03-09
    公开日:2016-10-15
    发明作者:
    申请人:Skf Ab；
    IPC主号:
    专利说明:

    A lathe can be used as a machine tool for producing mostly rotationally symmetrical workpieces by the machining process turning or by cutting and / or milling. With a lathe and tools attached thereto according to the desired machining, various rotating bodies can be produced. For example, can be made of semi-finished products, especially thick-walled plastic pipes, using a lathe and a correspondingly selected machining tool plastic seals. The seals may e.g. be cut out of the plastic pipes or tapped or unscrewed. For turning a product or several products, various processing tools, such as for cutting, milling, parting depending on the desired end product may be required, which must be brought to the rotating semifinished product for processing. A cutting tool may e.g. be brought to the semi-finished and can perform a rotation by rotation of the semifinished product. During rotation of the semifinished product, the cutting tool (or any other type of tool) may be displaced relative to the semifinished product to achieve a desired profiling or processing.
    For CNC lathes, it may be necessary for the production of desired products to change several turning tools in order to realize desired rotational contours. To achieve a high processing throughput, this tool change should be done as quickly as possible. In conventional systems, for the change operation on a CNC lathe, e.g. one
    Tool turret used, the turning tools are fixed on a disc on the tool turret. To select a desired tool for machining, the disc is attached to the tool turret e.g. With a motor rotated about an axis and snaps into the working position for the desired selected cutting tool. In the prior art, a so-called linear slide has been used as a further possibility for a quick turning tool change, in which the turning tools are fixedly arranged with each other. To use a selected tool, it is moved toward the tool by means of the lathe's coordinate table. A disadvantage of this linear slide is that it is only suitable for small turning diameters, since the turning diameter must be calculated as the distance from one tool to another as a safety distance for collisions, in order to avoid collisions.
    In both the tool turret system and the linear slide system, the free area for machining is limited by the geometry of the tools or by the arrangement. Thus, in conventional systems, only a certain number, i. Limited number of tools are used and there is always a risk of collision.
    It is an object of the present invention to provide a tool changing system and method for a lathe which permits changing a plurality of cutting tools, reduces a risk of collision, and can be performed reliably and safely.
    The object is solved by the subject matters of the independent claims. The dependent claims specify particular embodiments of the invention.
    According to one embodiment of the present invention, an apparatus is provided for selectively providing a first or at least a second tool (or a plurality of other tools) for a lathe (in particular a CNC lathe), the apparatus comprising a first and at least a second tool supply System (or a plurality of tool providing system). In this case, the tool-providing system in each case a holding element (in particular clamping element), which is formed, the respective tool (turning tool or cutting tool or milling tool) for machining a workpiece (eg a semifinished product such as a thick-walled plastic pipe) means to hold the lathe (in particular to clamp, to fix, so that upon rotation of the workpiece, the respective tool maintains its position). Furthermore, the device comprises a rod, which is mechanically connected to the holding element (in particular via a plurality of levers which are pivotally connected) for selectively holding the respectively held tool with a driven rod (so that it moves, in particular in a longitudinal direction) into a working position (In which the respective tool performs a machining of the workpiece) or a waiting position (in which the respective tool is removed from the workpiece or withdrawn so that no processing of the workpiece is carried out) to move (which may in particular comprise a pure translation, however, a partial rotational movement is also possible).
    The respective tools may e.g. be fastened by fasteners and / or screws on the holding element or be fastened. The device may e.g. comprising two to ten tool-providing systems, such that the apparatus enables selective machining of one or more workpieces with e.g. between two and ten different turning tools is possible. The rod may (via one or more intermediate mechanical elements) support the support linearly, i. in a straight line, translate to bring the respective tool to the workpiece or to move away from the workpiece.
    For machining the workpiece, exactly one of the tool-providing systems may be in a working-position operating mode, whereas all other tool-providing systems may be in a waiting-position operating mode, in the waiting-position operating mode are those at the other tool-providing operating modes. Systems mounted or held in a retracted from the workpiece position so that collisions are reduced. Furthermore, this limits the free area for machining less by the geometry of the tools or their arrangements. As a result, a larger number of tools can be used than in conventional systems.
    According to embodiments of the present invention, at the coordinate table of the lathe, the turning tools may be mounted one above the other without clearance, and may be moved by means of a lifting system and e.g. an air cylinder to be moved back and forth. As a result, only the moved or required tool can be moved forward (towards the workpiece) while others are away from the workpiece, i. are located behind or withdrawn. Thus, it can come to no Koiiision. Another advantage of embodiments of the invention may be a savings in pices and the ability to more conveniently place more tools in a smaller space, as has been conventionally possible.
    According to one embodiment of the present invention, the device further comprises a cylinder with a piston and piston rod, wherein the rod is formed as the Koibenstange of the piston, which can be moved pneumatically or hydraulically in the cylinder driven back and forth. The Zyiinder can e.g. having one (or two) compressed air port for supplying compressed air to the cylinder so as to move the Koiben and the Koibenstange along a longitudinal direction of the cylinder and thus also a longitudinal direction of the Koibenstange. To provide the compressed air may further be provided a compressor, and a compressed air distribution system with compressed air hoses to the respective cylinders of the tool-providing systems. Further, valves may be provided in the compressed air hoses that may be controlled by a user to drive a piston rod of a selected tooling system. Thereby, the apparatus for selectively providing various tools with conventionally available components can be realized.
    According to one embodiment of the present invention, the device further comprises a first joint (pivot allowing pivot about an axis), a first lever, a second hinge, a second lever, and a third hinge, the first hinge Rod pivotably connected to the first lever (rotatable about an axis), wherein the second joint pivotally connects the first lever to the second lever (rotatable about an axis), wherein the third hinge pivotally rotatable about the second lever with the holding member (about an axis ) connects. Thus, an advantageous hinge-lever chain can be formed, which can allow a linear displacement of the holding member when operating the rod, without exposing the rod, for example, in the working position of increased force in the longitudinal direction. The hinge lever chain may e.g. be formed and connected to the rod so that a force acting along the direction of displacement of the holding member in the working position (for example, due to the contact with the workpiece) transversely, in particular perpendicular, extends to a longitudinal direction of the rod. Thus, while the tool providing system is in the working position operating mode, the rod may advantageously be subjected to only a small load along its longitudinal direction. Thus, no special performance requirements are placed on the air cylinder or hydraulic cylinder, so that the device can be realized with low-cost and space-saving components.
    Furthermore, the device may have a, in particular rigid connection, guide rail, entiang of which the Haiteeiement is displaceable and which is fixed in particular perpendicular to the direction of displacement. Thus, a precisely defined displacement can be achieved and a maintenance of the position of the extended tool during processing can be ensured.
    The first lever may be rotatable about a lever pivot axis, which may in particular be fixed relative to the guide rail. Thus, a stress-saving design of the lever-joint system can be realized.
    In the working position (in the working position operating mode of the respective tool providing system) parallel axes of rotation of the second joint, the third joint and the parallel lever pivot axis (and in particular also the axis of rotation of the first joint) may be arranged so that through them to perpendicular straight line can be drawn, which runs along the direction of displacement. A force acting along the direction of displacement (in the working position) can thus act on the (fixed) lever pivot axis without acting directly on the rod. Thus, a mechanical load on the rod or of this driving cylinder or the piston driving this can be reduced.
    In the working position, a longitudinal direction of the rod perpendicular to the running along the direction of displacement straight line. Thus, a load on the rod can be advantageously minimized.
    The device may further comprise a transversely, in particular vertically, movable to the displacement direction of the holding member table on which the first and the second (and possibly several more) tool providing system are mounted side by side. This makes it possible to select a selected turning tool (which of a certain
    Tool delivery system is held) to introduce the workpiece for processing. Furthermore, conventionally available movable tables can be used, which can reduce the cost of the device.
    The holding element can be moved from the working position to the waiting position by a distance between 20 mm and 50 mm, in particular between 30 mm and 40 mm, in a straight line. Thus, a plurality of different turning tools can be selectively brought by the device for machining a workpiece in the respective working position. Furthermore, a majority of conventionally available rotary tools can be supported thereby.
    The apparatus may further comprise a controller configured to move the first tool of the first tool-providing system to the waiting position, to move the table transversely to the direction of displacement of the holding member of the first tool-providing system, and the second tool of the first tool-providing system second tool delivery system to spend in the working position. Thus, a displacement of the tool on the one hand by means of displacement of the holding element and on the other hand by means of a displacement of the table can be carried out in a coordinated manner in order to reduce or avoid collisions. For control, e.g. an electronic control with programming capability can be used and a suitable control program can be loaded into a processor and executed.
    The individual turning tools can be mounted on use-resistant guide rails. The connection to the air cylinder can be done with two levers and three joints. The mechanism can be controlled with a pneumatic cylinder. The mechanism can be designed so that the tool is locked in the extended state. The individual tools can be arranged side by side on a rail. In the retracted state (waiting position), the rotary tool can be located away from the workpiece and in the extended state (working position), the rotary tool can be brought to the workpiece and ready for turning (or for turning). According to embodiments of the invention, a cost-effective possibility of tool change can be realized. In this case, the advantage of collision freedom of a tool turret can be combined with a simple construction of a linear slide.
    Embodiments of the present invention will now be explained with reference to the attached drawings. The invention is not limited to the illustrated or described embodiments.
    FIGS. 1a to 1d schematically illustrate, in accordance with one embodiment of the present invention, a tool providing system that may be used in a device for selectively providing various tools for a lathe, in a front view, in plan view, in a side view from left or in a perspective view:
    FIG. 2 illustrates, in a schematic perspective view, an apparatus for selectively providing various tools according to an embodiment of the present invention having a plurality of tool providing systems as illustrated in FIGS. 1a to id; and
    3a to 3d illustrate a tool providing system, which according to embodiments of the present invention may be included in a device for selectively providing various tools, in a schematic front view, in a plan view, in a side view from the left and in one, respectively perspective view in a schematic way.
    Fig. 1d illustrates, in a schematic perspective view, a tool providing system 100 which may be included in a device for selectively providing various tools for a lathe, and Figs. 1a, 1b, 1c illustrate a front view, a plan view and a front view, respectively The left side view of this tool providing system 100. The tool providing system 100 includes a holding member 101 that is configured to hold a respective tool for machining a workpiece by the lathe. The holding element 101 is designed as a clamping element with a clamping plate 103 and clamping screws 105, whereby a tool, not shown in FIGS. 1 a to 1 d, can be held in a receiving space 107 by clamping or pressing by tightening the screws 105. The receiving space 107 may be formed in a standard size and shape for commercial turning tools.
    The clamping element or retaining element 101 is displaceable on a guide rail 109 along a displacement direction 111, in particular by a displacement path between 20 mm and 50 mm. The guide rail 109 can be fixedly mounted on a movable table, so that the holding member 101 can not be moved perpendicular to the displacement direction 111, in particular when a held in the holding member 101 tool is in a working position for machining a workpiece.
    The tool providing system 100 further comprises a piston rod 113, which is mechanically connected to the holding member 101 via a series of levers and joints to selectively displace a respectively held tool with driven piston rod 113 in a working position or in a waiting position. The in Figs. 1a to id illustrated operating state corresponds to the state in which a tool is in a waiting position, thus, the holding member 101 is located in a retracted position. To move a tool to a working position, the piston rod 113 can be displaced along a longitudinal direction 115 by means of a piston (not shown in the figures), which is moved within an air pressure cylinder 117 by compressed air which is supplied via a compressed air hose 119 or 120 ,
    The tool providing system 100 further includes a first hinge 121 attached to an upper end of the rod 113. A first lever 123 is pivotable about a hinge axis 125 by means of the hinge 121. The system 100 further includes a second hinge 127 by means of which a second lever 129 about a hinge axis 131 (relative to the first lever 123) is pivotable. The second lever is connected via a third joint 133 to the holding member 101 pivotally about a pivot axis 135 (relative to the fixed block). Further, the first lever 123 is pivotable about a lever pivot axis 137 of a pivot bearing 138. The pivot axes or pivot axes 125,131, 135 and 137 are all parallel to each other. The pivot axes 135 and 137 lie on a line 139, which is straight, and is oriented parallel to the displacement direction 111. In the waiting position, only the pivot axes 135 and 137 lie on the straight line 139. However, if a tool located in the holding element 101 is in the working position (extended position), then all the pivot axes or articulation axes 125, 131, 135 and 137 lie on the straight line 139, which is parallel to the displacement direction 111.
    In order to place the system 100 in the working position mode of operation, the piston rod 113 is moved downward in Fig. Id until the first lever 123 and the second lever 129 are aligned parallel to the displacement direction 111. For raising and lowering the piston rod 113, the air cylinder 117 is connected to an air pressure hose 120 at an upper end and connected to the air pressure hose 119 at a lower end. Supplying compressed air to the compressed air hose 120 causes the piston rod 113 to move downwardly, so that the tool held in the holding member 101 is shifted to the working position. Supplying compressed air via the compressed air hose 119 causes the piston rod 113 to be moved upward so that a tool held in the holding member 101 is shifted to the waiting position. The second lever 129 has two brackets 130, which receive an end of the first lever 123 between them, wherein the joint 127 is formed. The holding element 101 comprises an extension piece 141 with also two brackets 143, which receive between them an end of the second lever 129, wherein the hinge 133 is formed.
    The system 100 can be attached to a (movable) table by a plurality of screws 145. In block 147, a cylinder receptacle may be provided to receive the cylinder 117. A buffer 149 may be provided on an upper side of the block 147. At an upper end of the rod 113, a clevis 151 may be provided. The compressed air hoses 119,120 can be connected by a quick coupling 153 with the cylinder 117. The levers 123 and 129 may also be referred to as toggle levers. At the joints 133,127 Gleitbüchsen may be provided.
    FIG. 2 is a schematic perspective view of an apparatus 160 for selectively providing various tools for a lathe comprising a plurality of tool providing systems 100 as illustrated in FIGS. 1a-id. The multiple tool providing systems 100a, 100b, 100c, 100d, ... are side-by-side, i. offset perpendicular to the displacement direction 111 side by side mounted on a movable table 163, in particular with screws 145. In the illustrated in Fig. 2 operating mode is a tool 165 a, which is held by the clamping element or holding element 101 a of the tool-providing system 100 a , in a working position, whereas all other tool providing systems 100b, 100c, 100d,...
    Operating state are located. As illustrated in FIG. 2, in the working position, a leading edge of the holding member 101a is displaced forward by a displacement distance H relative to the holding members 101b, 101c, and 10ld along the displacement direction 111. In the working position operation mode of the tool providing system 100a, all the pivot axes 125, 137, 127 and 133 pass through the straight line 139 which is oriented parallel to the displacement direction 111.
    FIGS. 3a-3d illustrate an alternative embodiment of a tooling system 300, which according to embodiments of the present invention may be included in the apparatus 160 (see FIG. 2) for selectively providing various tools. In function and / or structure similar or similar elements are denoted in FIGS. 1a to Id and 3a to 3d with the same reference numerals, which differ only in the first digit. The views of the tool providing system 300 illustrated in FIGS. 3a to 3d correspond to the views of the tool providing system 100 illustrated in FIGS. 1a to id. The systems 100 and 300 illustrated in FIGS. 1 a to 1 d and FIGS. 3 a to 3 d have some features in common, but differ fundamentally from the orientation and mounting of the printing cylinder 117 and 317, respectively is illustrated in Fig. 1a to Id, the air cylinder 117 is oriented almost perpendicular to the displacement direction 111. However, in the system 300 illustrated in FIGS. 3a to 3d, the air cylinder 317 is disposed almost parallel to the displacement direction 311 but in a recirculated configuration, whereby expansion of the system 300 along the displacement direction 311 can be reduced. One end of the air cylinder 317 is connected to the guide rail or a pedestal 310 of the guide rail 309. The tool 365 is in a waiting position. In the working position, the pivot axes 337, 331, and 335 lie on the straight line 339, which is parallel to the displacement direction 311. However, the axis of rotation 325 of the first joint 121 is not on the line 339, not even in the working position. The first lever 323 has a 90 ° bend at the pivot axis 325.
    Reference numeral 100.300 Tool Provisioning Systems 101 holding element 103 clamping block 105 clamping screws 107 tool receiving space 109 guide rail 111 displacement direction 113 piston rod 115 longitudinal direction or displacement direction of the piston rod 117 air cylinder 119,120 air pressure hoses 121 first joint 123 first lever 125 joint axis 127 second joint 129 second lever 130 bracket 131 joint axis 133 third Joint 135 Joint axis 137 Swivel axis 139 Straight line 141 End piece 143 Bracket 145 Fixation screws 147 Block 149 Buffer 151 Clevis 310 Base 365 Tool H Displacement stroke 165 Tool 100a, 100b, 100c, lOOd Tool supply systems 160 Device for selectively providing various
    tools
    权利要求:
    Claims (10)
    [1]
    claims
    An apparatus (160) for selectively providing a first or at least a second tool for a lathe, comprising: a first (100a) and at least a second tool providing system (100b, 100c, 100d), each comprising: a holding member (101) which is adapted to hold the respective tool (165) for machining a workpiece by means of the lathe; and a rod (113) mechanically connected to the support member (101) for selectively displacing the respective held tool (165) when the rod (113) is driven to a working position or a waiting position.
    [2]
    2. Apparatus according to claim 1, further comprising: a cylinder (117) with piston and piston rod (113), wherein the rod is designed as the piston rod of the piston, which in the cylinder pneumatically or hydraulically driven can be moved back and forth.
    [3]
    The apparatus according to claim 1 or 2, wherein the tool providing system further comprises: a first joint (121), a first lever (123), a second joint (127), a second lever (129), and a third joint (133), wherein the first joint (121) pivotally connects the rod (113) to the first lever (123), the second joint (127) pivotally connecting the first lever (123) to the second lever (129) wherein the third hinge (133) pivotally connects the second lever (129) to the support member (101).
    [4]
    4. Device according to one of the preceding claims, further comprising: a, in particular torsionally rigid, guide rail (109), along which the holding element (101) is displaceable and which is fixed perpendicular to the displacement direction (111).
    [5]
    5. Device according to one of the preceding claims, wherein the first lever (123) about a lever pivot axis (137) is rotatable, which is in particular fixed relative to the guide rail (109).
    [6]
    6. Device according to one of the preceding claims, wherein in the working position parallel axes of rotation (131,135; 331,335) of the second articulation (127), the third articulation (133), in particular also of the first articulation (1221), and the lever pivot axis parallel thereto (137,337 ) are arranged such that they can be pulled through them to a perpendicular straight line (139,339) extending along the direction of displacement (111).
    [7]
    7. Device according to one of the preceding claims, wherein in the working position, a longitudinal direction (115) of the rod (113) perpendicular to the along the displacement direction (111) extending straight line (139,339) extends.
    [8]
    8. Apparatus according to any one of the preceding claims, further comprising. a table (163) movable transversely, in particular perpendicularly, to the displacement direction (111) of the holding element (101), on which the first (100a) and the second tool supply system (100b, 100c, 100d) are mounted side by side.
    [9]
    9. Device according to one of the preceding claims, wherein the holding element (101) from the working position to the waiting position by a distance (H) between 20 mm and 50 mm, in particular between 30 mm and 40 mm, can be moved in a straight line.
    [10]
    The apparatus according to one of the preceding claims, further comprising: a controller configured to: put the first tool (165a) of the first tool providing system (100a) in the waiting position; moving the table (163) transversely to the direction of displacement of the retaining element of the first tooling system; and to place the second tool (165b) of the second tool-providing system (100b) in the working position.
    类似技术:
    公开号 | 公开日 | 专利标题
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    同族专利:
    公开号 | 公开日
    CN106041591B|2020-09-22|
    AT517010B1|2017-09-15|
    CN106041591A|2016-10-26|
    AT517010A3|2017-06-15|
    DE102015206112A1|2016-10-13|
    DE102015206112B4|2019-05-09|
    引用文献:
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    DE102015206112B4|2015-04-07|2019-05-09|Aktiebolaget Skf|Tool changing device for a lathe|DE102015206112B4|2015-04-07|2019-05-09|Aktiebolaget Skf|Tool changing device for a lathe|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102015206112.4A|DE102015206112B4|2015-04-07|2015-04-07|Tool changing device for a lathe|
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