• 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:
    The invention describes a device with laterally mobile printing devices (16) on belt grinding machines in motion. These are brought into position in such a way that workpieces (11) detected by detectors (14) are ground in the longitudinal direction in a laterally limited area. An arrangement of such pressure arrangements is represented, for example, by a segmented sanding pad. The invention describes the method of lateral movement of its segments and the devices created for this purpose. These methods and devices make it possible, among other things, to sand frames in the direction of the wood grain of their friezes and / or their internal fillings or to apply sanding patterns to workpiece surfaces.
    公开号:CH716746A2
    申请号:CH01231/20
    申请日:2020-09-28
    公开日:2021-04-30
    发明作者:Kündig Stephan
    申请人:Kuendig Ag；
    IPC主号:
    专利说明:

    Field of technology
    The invention relates to the field of belt grinding technology.
    State of the art
    State of the art are sanding units with pressure elements acting over the whole or part of the working width, so-called segment sanding pads (DE1502449A1, Heesemann Karl, 07/03/1969). Compared to conventional sanding pads with a continuous pressure plate, these offer the advantage of an insert that is matched to the approximate width of the workpiece to be sanded and, as a rule, adequately dosed. However, the width of the segments limits the precision of their use in the direction transverse to the feed. A more precise positioning of pressure segments describes the utility model DE 200 03 656 U 1 (Weber Georg, July 6th, 2000) with belt assemblies that can be displaced transversely to the direction of passage. However, this solution proves to be unsuitable in practice, since the inertia of the lateral displacement of the belt assemblies only allows successive loading of workpieces at only low feed speeds and thus hinders an economically justifiable throughput. Just as impractical and uneconomical, especially when using several belt units, which are a prerequisite for a profitable throughput, would also prove to be the constant replacement of the short and thus quickly worn grinding belts. Methods and devices based on such a principle or such a construction are therefore not known in practice to date. The need for a practical, laterally precisely defined use of a sanding belt on a workpiece has actually existed for a very long time, not only for the frame sanding mentioned in the utility model specification mentioned above, but also generally for delimiting longitudinal sanding, for example for accurately dimensioned longitudinal strips on workpiece edges, if such as need to be roughened for a glue application. Another application of a precise lateral use of a sanding belt would also consist in the creation of targeted sanding marks for the purpose of creating linear drawings, writings or shaped surfaces on workpieces.
    Summary of the invention
    Not previously known and part of the present invention here are single or more rows attached, laterally precisely displaceable printing elements or devices, in the form of narrow sanding pads or contact rollers under one - this in contrast to the aforementioned utility model - the entire working width of a continuous device covering sanding belt, which thanks to their sideways movement allow the sanding of precisely assignable longitudinal webs. Such pressure elements can, for example, be segments of a segmented sanding pad and the object achieved by this invention can be understood to mean that the segments of a segmented sanding pad can be freely displaced and thus placed in a targeted manner.
    Brief description of the drawings
    [0004] To illustrate the present patent application:drawing 1, revealing the state of the art, of a grinding device with a feeler device (10) and several laterally immovable pressure elements, the segments (13) of a segmented sanding pad, which act on the sanding belt (12) according to the approximate width of the workpiece (11) conventional kindthe drawing 2, illustrating the invention, a grinding device with a detector (14), two transverse guides (15), laterally mounted mobile printing devices (16) and the servomotors (17) moving these, in the place of which there are also a central, controlled drive can3, which shows a conventional profile of the filling (20) of a frame which is symmetrical with respect to both longitudinal and transverse friezes (18, 19)the drawing 4, which illustrates a method that uses laterally mobile pressure elements (16) both the grinding of the longitudinal friezes (18) of a frame without touching its transverse friezes (19), as well as the grinding of a panel inside the frame (20) by appropriately placing these mobile pressure elements (16)the drawing 5, a representation analogous to the drawing 4, but for the purpose of grinding the inner filling (20) individual or several mobile pressure elements (16) additionally oscillate (represented by arrow line)the drawing 6, which shows the lifting of individual printing devices (16) when they are not in use to a higher levelthe drawing 7, which shows the cranked holder (21) of the printing devices (16)the drawing 8, which illustrates the use of movable printing devices (16) for generating an individually configurable grinding pattern (22)
    Description of the embodiments
    When using the device described by the invention, shown in drawing 1, workpieces (11) are detected at their side edges by a detector (14), for example a camera or a laser device. A control device brings the mobile printing devices (16) on the guides (15) into the appropriate lateral position by means of linear movement, for example servomotors (17) and spindles, and controls their use. Any deviations from the right-angled entry of the workpieces (11) are compensated for by the control system. Laterally precisely movable printing devices are used, especially when sanding frames with longitudinal (18) and transverse friezes (19). After a previous cross-sanding of the entire frame, the longitudinal friezes (18) are sanded to the exact position so that the sanding direction for all friezes finally matches the direction of the wood grain. If internal fillings (20) are also to be ground in the frames, further, individual or in rows, movable pressure devices (16) are used for this in the same pass. Since frame fillings, as shown in drawing 3, usually have a distance from the friezes (18, 19) surrounding them, an approximate positioning of the pressure devices (16) is usually sufficient for their grinding. If this cannot be done, or if it cannot be done with sufficient accuracy, an oscillating movement of the pressure devices (16) will solve the problem. The oscillation enables a wider area to be processed than that of the width of the pressure elements themselves. The pressure devices (16) are used to grind the filling (20) with a time delay to the use of the longitudinal friezes (18). They can only be inserted after passing the first transverse frieze (19) and must be suspended before passing the second transverse frieze (19). The temporal use of the pressure devices (16) on the longitudinal friezes (18), on the other hand, only has to take into account the leading and trailing workpieces. In principle, movable printing devices can be attached without any gaps over the entire width of a throughfeed machine and thus optionally also function like a segmented sanding pad of conventional design, as well as being installed only in limited numbers. For applications such as frame sanding or the creation of special sanding patterns, any number of printing devices can be raised to a second level, as illustrated in drawing 6, in order to create space for the printing devices that remain below for their lateral movement. As mentioned, the conventional segment sanding pad is an arrangement of pressure devices. The present invention therefore also describes the expansion and modification of the segment sanding pad, on the one hand through the lateral, driven mobility of the segments on guides, which also includes their ability to oscillate a cranked attachment (21) in such a way that segments moving in opposite directions are able to cross and furthermore by lifting the segments not only for the purpose of not using them, but also to create space for the movement of further segments. These expansions give the segment sanding pad additional functions that enable it to solve the tasks described above. The space-saving and thus cost-saving implementation is ensured by an eccentric and cranked (21) instead of the previously known central bracket for the segments.
    权利要求:
    Claims (9)
    [1]
    1. Device for the laterally precisely defined use of a sanding belt when sanding workpieces in motion, characterized in that detectors (14) detect workpiece characteristics and a control unit moves mobile printing devices (16) on guides (15) into the lateral positions corresponding to the workpiece surface to be sanded brings under this sanding belt
    [2]
    2. The method, characterized in that the segments (13) of a segment sanding pad are laterally displaceable and can thereby be placed in freely determinable positions
    [3]
    3. The method according to claim 2, characterized in that the segments (13) of a segment sanding pad oscillate as required
    [4]
    4. The method according to claim 2, characterized in that the segments (13) are lifted off if necessary and thus create space for further segments (13) for their lateral movement and their locally determined use
    [5]
    5. A segment sanding pad, characterized in that its segments (13) can be moved laterally on guides (15) by motor, pneumatically, hydraulically, manually or in some other way
    [6]
    6. A segment sanding pad, characterized in that two or more segments (13) can be crossed in the opposite direction due to their cranked holder (21) when they are moved laterally
    [7]
    7. The method using the devices and methods according to claims 1, 2, 3, 4, 5 and 6, characterized in that frames are sanded in the wood fiber direction of their friezes by first sanding the frame transversely on the same or a third-party system then the longitudinal friezes and / or frame fillings are sanded lengthways using laterally movable pressure devices
    [8]
    8. The method using the devices and methods according to claims 1, 2, 3, 4, 5 and 6, characterized in that fillings of frames are ground
    [9]
    9. The method using the devices and methods according to claims 1, 2, 3, 4, 5 and 6, characterized in that decorations, patterns and other shapes are ground on workpiece surfaces using one or more movable printing devices
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    同族专利:
    公开号 | 公开日
    WO2021074681A1|2021-04-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1502449B2|1965-10-22|1976-12-02|Heesemann, Karl, 4970 Bad Oeynhausen|PRESSURE BEAM FOR A LONG BELT SANDING MACHINE|
    JPH06508073A|1992-05-19|1994-09-14|
    DE9214527U1|1992-10-27|1993-01-07|Paul Ernst Maschinenfabrik Gmbh, 6925 Eschelbronn, De|
    DE20003656U1|2000-02-28|2000-07-06|Weber Georg|Belt grinder|
    AU2002317135A1|2002-07-22|2004-02-09|Kundig Ag|Devices with angularly adjustable sanding units|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH13212019|2019-10-16|
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