EP1137512B1 - Verfahren zur steuerung des schleifprozesses sowie rechnersteuerung für breitschleifmaschine - Google Patents
Verfahren zur steuerung des schleifprozesses sowie rechnersteuerung für breitschleifmaschine Download PDFInfo
- Publication number
- EP1137512B1 EP1137512B1 EP99957827A EP99957827A EP1137512B1 EP 1137512 B1 EP1137512 B1 EP 1137512B1 EP 99957827 A EP99957827 A EP 99957827A EP 99957827 A EP99957827 A EP 99957827A EP 1137512 B1 EP1137512 B1 EP 1137512B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding
- thickness
- computer control
- workpieces
- workpiece
- 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.)
- Expired - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/005—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents using brushes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/10—Single-purpose machines or devices
- B24B7/12—Single-purpose machines or devices for grinding travelling elongated stock, e.g. strip-shaped work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/10—Single-purpose machines or devices
- B24B7/12—Single-purpose machines or devices for grinding travelling elongated stock, e.g. strip-shaped work
- B24B7/13—Single-purpose machines or devices for grinding travelling elongated stock, e.g. strip-shaped work grinding while stock moves from coil to coil
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
- B24B7/28—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding wood
Definitions
- the invention relates to a computer control and a method for controlling the Grinding process of a wide grinder for flat workpieces, with at least two successive, height-adjustable loop interventions.
- the second fact recognizes from the fact that in principle water is always water and electricity is always electricity.
- the material can be wood, glued boards, Plastic, rubber, cork, mineral material, etc.
- the grinding conditions are in any case different with the other material.
- the third factor lies in the fact that, according to current knowledge, the automation of a production process in itself no longer presents any difficulties, except in relation to the neuralgic Area of monitoring and sensor means. Without monitoring and sensor means there is no automation, because otherwise given goals of quantity and quality never are reachable.
- the big problems are just beginning with the sensor means. So that sensors generate and pass on precise information about the local conditions the sensor technology must be connected to the respective product, i.e. Customized wood, plastic, rubber, cork, plaster and other mineral materials etc.
- Process automation is understood to mean process control or regulation, insofar as it directly influences the goods themselves that are processed or processed is taken.
- the subject of the present application is Workpieces that are changed using a grinding process.
- the counterpart to that Process control is the so-called machine control, through which the machine and all modules and components in and on the machine are supplied with power as well as controlled and monitored, with the exception of the workpiece itself
- Machine control can achieve the highest level of computer technology in terms of expansion contain. Because there is no informational feedback from the workpiece itself, can theoretically the workpiece is almost automatic, but without guarantee for the work result to be edited. So the machine control is blind to the work result, especially for the quality of the result.
- the process control takes effect in terms of many parameters in the machine control and builds especially on the Machine control on. With a picture is the process control of the vehicle driver, the machine control system the entire vehicle electronics or electronics.
- EP O 127 760 is a special construction concept the height setting of a machine upper part of a wide grinding machine trained that e.g. Panels that are too thick do not damage the machine result.
- the goal is achieved by an infinitely height-adjustable, with an adjustable fluid pressure medium and the upper and lower housing part connected load element, which with a spacer the lowered upper housing part and the lower housing part clamped.
- the problem of thickness deviation solved.
- the applicant is not aware of that in the past 10 or 15 years in practice the next step, namely an automatic process control could be.
- the inventors have recognized that real customer benefits only really exists if the overall economy increases can be.
- the overall economy is improved if, firstly, a given one Throughput as well as the required grinding quality and an optimum service life can be achieved are, without additional energy consumption or large and secondly the process and Investment support even without a disproportionate increase in the qualification of the Operating personnel is possible.
- Investment costs for a computer control can then be kept low if not tailor-made for each individual system an individual control concept must be developed, but if much more a basic concept can be worked out, that for the vast majority of cases in the same area of expertise are successful through mere specific adjustments can be used.
- energy consumption there are serious reasons that at the current usual belt speeds, at least in many cases, the optimum is not achieved.
- chipboard is probably the best known Product.
- a mixture of wood or wood fiber material is used for the production of chipboard and glue pressed into sheets.
- a full production line for In addition to the storage of raw and finished goods, chipboard mainly consists of Panel production, a sawmill and the grinding line, which is a central part the whole more or less continuous production line.
- the older one Multi-day board manufacturing processes can only work with a large thickness tolerance getting produced.
- the grinding material on the wide grinding machines consists essentially of widths of up to 3 meters Grinding rollers or carrier belts as well as those applied with an adhesive Abrasives.
- the sanding belts for the wide sanding machines are an endless belt glued.
- the glue point or the corresponding splice can become independent the type of connection as a so-called chatter mark on the ground plate surface to make noticable. Especially when the ground plate is then covered with a thin foil is coated, no chatter marks may be present.
- the grinding process is therefore carried out in several steps: as calibration grinding, as a finishing touch and as a shoe finishing touch.
- the shoe grinding and the calibration grinding can be combined as required.
- the main task is to fine-tune the surface roughness to improve the calibration grinding.
- the grinding with the grinding shoe serves especially the eradication of the chatter marks.
- the majority of particle boards are Semi-finished product, on which further surface refinements are then carried out Need to become.
- chipboard with a thin film coated For this, the highest demands are placed on the surface quality posed, and also a very high degree of surface flatness, and it becomes a Dimensional accuracy for the plate thickness of ⁇ 1/100 millimeter required. This Claims can only be made with the top and bottom and on both sides of the milling unit acting guide or feed units are guaranteed.
- Die DE-OS 18 15 858 relates to a belt grinding machine for the grinding of plate-shaped Workpieces with a fine grinding unit for a rough grinding unit Achievement of the desired, exact thickness value of the processed plate follows. To the deviations occurring in such grinding machines from the To counteract desired setpoints, the Thickness of the machined workpieces recorded and depending on these thickness measurements controlled a delivery device assigned to the fine grinding unit.
- the object of the invention is the pre-trained grinding method in such a way train that deviations from the desired setpoint is counteracted as quickly and particularly effectively, so that even in the event of raw workpieces with large excess thicknesses or strongly fluctuating excess thicknesses at the end of the grinding process, plates with a nominal size are always obtained.
- the object is achieved in that thickness measurements at least in the area in each case between at least one rough grinding unit and at least one central and / or Fine grinding unit using at least one automatically working Thickness measuring device determined and depending on these thickness measurements at least one infeed device assigned to the rough grinding unit for change the size of the respective grinding gap is controlled.
- the Grinding unit or grinding units in the sirine of a percentage Grinding gap opening during the processing of the respective Workpiece always created such a real-time correction that not itself temporarily grinding results that otherwise would have to be accepted in the prior art - to deviate from the required target strength Lead plate thicknesses.
- the invention was based on the object, according to solutions, especially for one to seek meaningful process control that results in real customer benefit.
- aim the invention was to provide thickness tolerances and surface quality over extended periods Operating times by changing setting parameters even without manual Ensure intervention.
- Another equally important sub-goal was, if possible long downtimes of the machine and the equipment (grinding material, etc.) without the to achieve previously mentioned quality losses. This through targeted influence and correction of individual functional elements in a work process for General cargo processing and continuous throughput of the individual workpieces at least two successive loop interventions.
- the method according to the invention is characterized in that grinding-related Starting recipes provided, an order-related or work item-specific Optimal start recipe selected and the grinding work or the loop intervention is monitored, and based on the monitoring of the work result of the first and subsequent ground workpieces Reference to at least one or more of the following parameters, as a target or Control variable as necessary, repeated, each for the subsequent workpieces be changed as grinding recipe for follow-up work: grinding acceptance after the first Looping engagement (30); Workpiece thickness, the belt speed of the sanding belt, or the grinding roller speed, the grinding pressure, the throughput speed of the workpiece, quality tolerance band (s) and height intervention for the Grinding procedure.
- grinding-related Starting recipes provided, an order-related or work item-specific Optimal start recipe selected and the grinding work or the loop intervention is monitored, and based on the monitoring of the work result of the first and subsequent ground workpieces Reference to at least one or more of the following parameters, as a target or Control variable as necessary, repeated, each for the subsequent workpieces be changed as grinding recipe for
- the computer control according to the invention is characterized in that the Computer control has a process controller that process-related recipes can be selected for the automatic start setting of the loop units, wherein a loop intervention monitoring device is arranged, on the basis of which at Deviation via the grinding recipe, if necessary, repeated corrective interventions are feasible and change the grinding recipe after one or more Continuous test pieces for the follow-up work is made.
- the belt speed to be set so low that the required order for the specific order Grinding quality with sufficient security is still achievable. It should make a distinction whether the highest surface quality is just good enough, or whether lower quality requirements are sufficient. The same applies to the thickness tolerance. This means that the resources have to be used in a more targeted manner. It is it is also conceivable that the equipment will run to the limit under extreme load are required, whereas in the case of only partial utilization of the system, this is done deliberately the equipment can be spared. The obvious consequence is that the service life of the machine, in particular of the abrasives e.g. the sanding belts or grinding rollers are greatly increased and costs can thus be saved. Further the new solution allows a relatively economical management, too if that.
- the new solution provides the control itself with optimal setting values so that the maximum possible economy is observed.
- Another important aspect lies in that the new solution is not limited to a single problem solution. Rather, the new method for controlling the grinding process, or the new one Computer control open in the most important points. It becomes a basic framework provided that figuratively speaking both in depth and in height and width is expandable. The new solution can be used in a variety of operating situations adapt and expand as required.
- the control preferably has a computer control with a multi-size controller for target sizes, with at least two the following target values can be defined: sanding belt speed or sanding roller speed, Grinding pressure, grinding acceptance, motor power consumption (s), Tolerance ranges of the surface quality as the finish, the grinding quality as the structure of the Surface and thickness dimensions.
- the target variables are particularly preferred in function of the overall economy, the quality of the end product and the Tool life optimization, especially with regard to the abrasives and the wide grinder and their components selected.
- the introduction of Different parameters as target sizes has the enormous advantage that important Parameters can be formulated as a wish.
- the priority goal remains e.g. a tolerance band for the plate thickness as well as the surface quality.
- An important point is not only the direct possibility of intervention of the human being, but above all the recycling, if necessary ongoing registration of sensory control and test results via the human sensory systems.
- Another important advantage of the new solution is that that in addition to any expansion of the hardware and software for the Control side and also on the machine side and in relation to the sensors etc. none Restriction for additions and further developments as well as networking with other computers exist.
- One or more drive motors can be speed-controlled trained and e.g. an automatic regulation of the thickness dimension be provided.
- the thickness measurement can be mechanical, even better via electronic means or via a laser measuring means.
- For engine power consumption and the grinding pressure can be known components from the trade use.
- Significant advantages can already be achieved with the four parameters of the new solution.
- the missing automatically working sensor means can be recorded and monitored by the surveillance personnel as in the prior art the values are entered and saved for later use of the computer control become. Such a procedure allows full automation in stages realize what is mostly the more economical way.
- a decisive advantage The new solution is that the so-called setting up the machine for one new order is carried out by the process controller or at least supported.
- the height-adjustable ones Grinding units as at least one adjustable calibration unit and at least an adjustable fine grinding unit and the monitoring device as a thickness measuring or thickness monitoring device-trained and after the calibration unit arranged.
- Wide grinding machine e.g. for clamping plates.
- a first machine setting is made, will be the same the main grinding work or the calibration grinding was carried out on a sample plate Grinding result after the first grinding intervention or calibration grinding by means of thickness measurement checked.
- the following plates are also changed Edited specifications.
- the informative value an exact measurement is best after the calibration grinding, because in consequently not only a guarantee for an exact thickness dimension after the fine sanding exists, but also the best possible surface quality can be achieved. you evaluates the very specific work result on the specific workpiece and can optimize the quality promotion for the subsequent finishing.
- the process controller as a multi-size controller train with two or more signal inputs of corresponding sensors, in particular sensors for the height adjustment of thickness sensors, sensors for the Surface quality of the workpieces, for the motor power consumption (s), Throughput speed of the workpieces, as well as the workpiece inlet and workpiece outlet and the belt speed (s).
- the multi-size controller has that Function to monitor several parameters simultaneously and to correct them if necessary. This results in a spatial figure with several boundary walls the number of parameters.
- the boundary walls can e.g. in extreme cases a stop if there is a risk that an important parameter except Koritroll device, or the immediate implementation of a correction program. It can almost be excluded that several parameters simultaneously have a critical value accept.
- the starting recipe should be at least the basic information for the raw workpiece the composition of the Raw material e.g. Thickness, hardness, hardness of the surface, layer structure and type of Raw materials such as wood, plastic, rubber, mineral etc.
- the starting recipe at least has one or more of the following editing parameters: the height settings the grinding heads or the stand, power consumption of one or more Drive motors, the throughput speed of the workpieces, the belt speed, the life of the sanding belt, or the condition of the sanding belt, the type of sanding belt, Grinding pressure, torque, grinding shoe heating.
- the recipe specifications as well as Prescription corrections saved, be it for later evaluation or use.
- the starting formula should have at least two or more thickness tolerance registers, especially for a coarse tolerance and a fine tolerance, furthermore an input option for freely definable tolerance range (s).
- a tolerance value on the safe side or the the largest possible, still permissible thickness for the starting recipe can be selected so that this and, if necessary, 2 to 3 following plates with excess thickness in a later one Pass can be reground to the tolerance desired by the customer.
- the system can have a thickness measuring and monitoring device the calibration unit or the first calibration unit and a thickness measuring and Have monitoring device after the last fine grinding unit.
- the workpiece feed direction are in the area of the two side edges of the workpieces preferably at least one thickness measuring device or one thickness monitoring device is arranged.
- a test formulation as a starting formulation when processing a new grinding job for the first time
- grinding recipes which is optionally based on a previous same grinding job or can be selected based on a starting recipe or a test recipe. The The number of start and grinding recipes depends on the corresponding number different processing orders.
- machining settings Manual input devices provided. These are single, preferably adjustable via corresponding manual actuators. If necessary in the Recipe can be registered. Appropriate manual actuators are at least one or several of the following parameters can be selected: height adjustment of the grinding heads or the machine stand, grinding acceptance of the grinding units, feed of the workpieces, Sanding belt speed, condition of the sanding belt, sanding pressure, torque, Sanding pad warming. This not only has the advantage of being on the move Hand more optimal values can be determined, but that in the event of a malfunction at least simple grinding work even without automatism with human Control can be carried out. All important parameters, both the machine parameters like the process parameters should be visualized.
- Either Individual manipulated variables can be corrected manually using the computer keyboard or on site with appropriate feedback to the computer and the visualization.
- the other changeable parameters in automatic mode are via a if necessary adaptable grinding recipe or corresponding programs can be controlled: via the visualization should the current values in relation to target sizes, on request or in critical situations are automatically displayed: in particular grinding pressure, Grinding acceptance, motor power consumption, thickness and surface tolerances, Sanding belt speed, speed of the workpieces, also pictures from the Schleifstrasse e.g. Loading of the grinding line, stacking, suction, also trend pictures, especially when approaching important target or limit values.
- the new solution is primarily based on the model of the classic control. This means that appropriate intervention points the respective values are controlled by the computer as setpoint specifications and remain unchanged until a new control command comes. However, this does not end that individual selected or multiple parameters via subordinate control devices are controllable via corresponding setpoint specifications: Height adjustment the grinding heads or the machine stand, grinding acceptance, workpiece feed, Sanding belt speed, sanding pressure. Such a local regulation can be very be advantageous if better within a certain tolerance band Values are achievable. However, the regulation may only be within the scope and depending on the Computer control or the multi-size controller take place, otherwise the overpredged Objective of overall economy is lost.
- the classic regulator works according to a strict target / actual value comparison.
- the multi-size controller takes hold mostly based on completely different criteria.
- a higher-level parameter can be the Total electricity consumption in peak consumption. It can be interesting at this time be to use electricity consumption as the main criterion.
- the new solution allows a very high degree of automation and the provision of any data. This allows for plate-like workpiece and quality coding e.g. on one Attach the side edge of the plate with a code printer.
- FIG. 1 schematically shows the key points of the new solution.
- a calibration unit 1 and a fine grinding unit 2 are shown.
- a workpiece 3 is shown as a flat plate 3 that is ground from above only on one side.
- the plate 3 has a raw thickness Dr before the grinding engagement, a thickness D K after the first or calibration grinding and a thickness D F after the fine grinding.
- the difference in thickness between Dr and D K is, for example, 0.4 mm, which corresponds to a grinding decrease of 0.4 mm.
- the grinding decrease in fine sanding is in the range of a few hundredths of a millimeter.
- a thickness measuring and / or thickness monitoring device 4 is drawn as a loop intervention monitoring device, which is described in greater detail with FIGS. 5, 6a and 6b.
- the plate thickness D K is determined via two sensing rollers 5 and 6 and the corresponding signal Ds is forwarded via a data bus 7.
- the calibration unit 1 and the grinding unit 2 are mounted in a stand of the wide grinding machine S TM , symbolized with a thick line.
- H P represents a height position signal generator by means of which the desired grinding acceptance can be determined.
- the workpiece or the plate 3 is guided several times so that the desired grinding accuracy can be achieved at all.
- Corresponding single or double guide rollers 8, 9 and drive rollers 10, which are mounted in the machine, ensure the precise conveying of the workpieces through the grinding line, according to arrow 11 in FIG. 1 from left to right.
- the throughput speed of the plate 3 is determined by speed sensors V PS .
- the grinding belt speed V KBS the drive motor current A K and A F in the fine grinding unit are shown in FIG.
- the height position of the abrasives can be done in several ways, as mentioned above over the entire machine stand or, for example, via eccentric adjustment means of each of the grinding heads or on the calibrating grinding head Hks and on the fine grinding head FHs.
- the signals mentioned can be made available via the data bus 7 to the control and control level, which consists of the three primary components: the machine control PLC 12, a recipe memory 13, an order and recipe input 14, and a multi-size controller 15.
- Figure 2 is used only to illustrate the recipe control. Are for simplicity only a few parameters are listed. Belt speed as well Height settings are manipulated variables, whereas the decrease in grinding, the thickness and the approximate engine performance are target values, which are not with plate 1 be reached. A recipe correction is made for plate 2, the Recipe correction intervenes in both the manipulated variables and the target variables. It will made a better proposal, so to speak. The actual values of plate 2 are good. In order to is continued with the same recipe specifications for the following plates. Not shown is a tolerance band for the target values grinding decrease l, thickness after l, suprae engine power l, which is also specified. Arises in relation to the tolerance band is a deviation outside the specified tolerance corrected the prescription again.
- FIG 3 shows a schematic representation of a control and management scheme Reason for the new solution.
- the actual machine control requires many interventions, also for safety reasons, sensor signals such as local temperatures, Motor currents, position signals, e.g. the height positioning of the machine stand or of a single grinding head. At least part of these sensor values are equally important for process control. Especially quality values can can be captured even better and more economically today by people themselves.
- the new solution therefore provides that the results of the examination by the human sensors also in the recipe management and for the specifications can be saved. This also includes rapid tests with blue or black chalk, which provides valuable information about the surface, e.g. if so-called chatter marks are available.
- Man is therefore in the middle of the Set management level, where the administration and monitoring is also located.
- On Part of the monitoring is the visualization Visu on screens 14 '.
- the visualization has one particularly with the quality monitoring important function. Certain trends can be positive or negative be followed. This can also be done with appropriate program design are automatically displayed if any intervention may be necessary.
- the visualization allows the operating personnel to intervene earlier than before and change recipes. Especially when it comes to existing systems automate, it can make sense to do this step by step.
- STAG is the previous control input 20 denotes. This can remain with the Restriction that commands can also be entered from another place, especially from Multi-size controllers 15 are possible.
- the concept can also be in a Transitional phase should be provided as a double tax system for emergencies.
- a data interface 21 can upstream and downstream investment sectors, for example Panel production, sawmill, transport system etc., for the exchange of information be used.
- This means that the various investment sectors in the final phase are not only electronically networked, but that overall surveillance anywhere can be provided. It can be used as a whole plate factory Production line can be automatically controlled by the process.
- All important information including the system status can be immediately viewed represent.
- the visualization image for the entire grinding line is designated by 22.
- the electrical and electronic connections are from the machine control to the machine parts indicated at 23.
- 24 are the data lines to the Measuring devices and sensors in the area of the machine.
- 25 is the controller sensor for the feed (VPs), 27 for the adjustment device for the height positioning of the Machine stand, 28 the height positioning of the individual grinding heads and 26 for the motor currents.
- QMs is the possibility of manual entry of values designated especially by quality values.
- Figures 4a to 4d show some examples of visualizations.
- About one Menu tree (Figure 4a) can determine the desired drawing files and immediately on the Screen 14 'are brought for the visualization ( Figure 3).
- From the Machine overview images (FIGS. 4b-4d) show that this is a Grinding line with first calibration grinding 30, second calibration grinding 31, fine grinding 32 and grinding shoe grinding 33.
- the corresponding grinding heads are part of the Machine 1 or part of machine 2, each with an independent height adjustment 34 or 35 have.
- Upstream of machine 1 are feed tables 36, downstream of the machine 2 discharge tables 37, which together with the Grinding machines represent an entire grinding line.
- FIGS. 5, 6a and 6b show a thickness measuring and monitoring device 4, FIG. 5, viewed in the transport direction.
- the two stable supports 41, 42 are connected via supports 43, 43 'and supported downwards.
- the start, passage and end of a plate can be determined with a further flow sensor 44.
- the sensing rollers 5 and 6 are pressed onto the workpiece 3 by the measuring heads with a certain force via corresponding pneumatic cylinders.
- the exact thickness of the workpiece 3 can be continuously determined from the fixed dimension A D and the varying dimension Ax using position sensors (not shown) and used accordingly for process control.
- FIG. 7 shows three photographs of the respective surface structure after grinding with different abrasive materials or fineness of abrasives P 40, P 100 and P 180.
- Rz means an average roughness depth
- RK a core roughness depth
- Rpk and Rvk derived values Analogous are in the FIG. 8 shows corresponding photographic recordings for the roughness.
- FIGS. 9a and 9b only show an example of a specific embodiment of a wide grinding machine with two grinding heads 50, 50 'and 51, 51' for grinding workpieces on both sides.
- the machine consists of an upper stand 52 and a lower stand 53.
- the height of the upper stand is adjusted via controllable spindles 54.
- Each grinding head has its own drive motor 55, which in the.
- the speed can preferably be regulated in order to be able to vary the speed of the grinding belts in this way.
- the width of the machine is indicated with B x , which can be from one meter to over three meters.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Description
- Auswahl von Optimalstartrezept
- Schleifeingriff-Überwacheinrichtung
- sowie die Änderung der Schleifrezeptur nach einem oder mehreren Durchlaufprobestücken für die Folgearbeit
- für die Änderung der Rezeptur werden bevorzugt eine oder mehrere Werkstücke mit einer optimalen Startrezeptur geschliffen und erst nach dem Durchlauf die Änderung vorgenommen.
- die Figur 1
- schematisch die Bechnersteuerung des Schleifprozesses;
- die Figur 2
- ein stark vereinfachtes Beispiel für die Rezepturvorgabe und -korrektur;
- die Figur 3
- schematische Übersicht der Hauptelemente einer Anlagesteuerung;
- die Figur 4a - 4d
- Beispiele von Visualisierungen;
- die Figur 5
- eine automatische Dickenmessung auf beiden Werkstückseiten;
- die Figur 6a und 6b
- eine Seiten- und Frontansicht einer Dickenmesseinrichtung;
- die Figur 7
- graphische Darstellung mit zugehörigen Werten der Oberflächenrauhigkeit, über eine Laboruntersuchung;
- die Figur 8
- Laborbildaufnahme der Plattenoberfläche nach verschiedenen Schleifeingriffen;
- die Figur 9a und 9b
- eine Front- und Seitenansicht einer Breitschleifmaschine;
- die Figur 10
- ein Beispiel für den schematischen Aufbau einer vollständigen Maschinen- und Prozess-Steuerung für eine Breitschleifmaschine.
- Rezepturen
- Anlagezustands-Informationen, Masken, Bilder
- Rezeptureri als Eingabe und Verwaltung (nur wenn keine Leitstandebene)
- Rezeptur Abruf wenn Leitstandebene
- Einzeldaten-Eingabe / Steuerung
- Anlagezustands-Informationen (Masken, Bilder)
- einfache Maschinen-Bedienung, manuell
- Maschinenzustands-Informationen.
Claims (21)
- Verfahren zur Steuerung des Schleifprozesses einer Breitschleifmaschine für flache Werkstücke (3) mit wenigstens zwei aufeinanderfolgenden höheneinstellbaren Schleifeingriffen,
dadurch gekennzeichnet, dass sehleifprozessbezogene Startrezepturen bereitgestellt, ein auftragsbezogenes bzw. arbeitspostenspezifisches Optimalstartrezept ausgewählt und die Schleifarbeit bzw. der Schleifeingriff überwacht wird, und auf Grund der Überwachung des Arbeitsergebnisses der ersten und nachfolgenden geschliffenen Werkstücke die Optimalstartrezeptvorgaben in Bezug auf wenigstens einen oder mehreren der folgenden Parameter, als Ziel- oder Stellgrösse so weit erforderlich, wiederholt, jeweils für die nachfolgenden Werkstücke als Schleifrezeptur für die Folgearbeit geändert werden: Schleifabnahme nach erstem Schleifeingriff (30); Werkstückdicke, die Bandgeschwindigkeit des Schleifbandes, bzw. die Schleifwalzengeschwindigkeit, der Schleifdruck, die Durchlaufgeschwindigkeit des Werkstückes, Qualitätstoleranzbänd(er) sowie Höheneingriff für den Schleifeingriff. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass die Steuerung eine Rechnersteuerung (12) mit einem Mehrgrössencontroller (15) für Zielgrössen aufweist, wobei wenigstens zwei der folgenden Zielgrössen festlegbar sind: Bandgeschwindigkeit, Schleifwalzengeschwindigkeit Schleifdruck, Schleifabnahme, Motorleistungsaufnahme(n), Toleranzbereiche der Oberflächenqualität als Finish, der Schleifqualität als Struktur der Oberfläche sowie Dickenabmessungen. - Verfahren nach Anspruch t oder 2,
dadurch gekennzeichnet, dass die Zielgrössen in Funktion der Gesamtwirtschaftlichkeit, insbesondere der Qualität des Endproduktes, sowie der Standzeitoptimierung insbesondere in Bezug auf die Schleifmittel sowie die Breitschleifmaschine und deren Komponenten auswählbar sind, und bei Erfordernis durch direkten menschlichen Eingriff korrigierbar sind. - Rechnersteuerung für Breitschleifmaschine zum Schleifen von flachen Werkstücken (3) mit wenigstens zwei aufeinanderfolgenden und höheneinstellbaren Schleifeinheiten,
dadurch gekennzeichnet, dass die Rechnersteuerung (12) einen Prozesscontroller (15) aufweist, dass prozessbezogene Startrezepturen auswählbar sind, zur automatischen Starteinstellung der Schleifeinheiten (1, 2), wobei eine Schleifeingriff-Überwacheinrichtung angeordnet ist, aufgrund welcher bei Abweichung über die Schleifrezeptur gegebenenfalls wiederholt Korrektureingriffe durchführbar sind und die Änderung der Schleifrezeptur nach einem oder mehreren Durchlaufprobestücken für die Folgearbeit vorgenommen wird. - Rechnersteuerung nach Anspruch 4,
dadurch gekennzeichnet, dass wenigstens eine einstellbaren Schleifeinheiten als Kalibiriereinheit (1) ausgebildet ist. - Rechnersteuerung nach Anspruch 4 oder 5,
dadurch gekennzeichnet, dass wenigstens eine einstellbare Schleifeinheit (1, 2) und die Überwacheinrichtung als Dickenmess- bzw. Dickenüberwacheinrichtung (4) ausgebildet und nach der Kalibriereinheit (1) angeordnet ist. - Rechnersteuerung nach einem der Ansprüche 4 bis 6,
dadurch gekennzeichnet, dass der Prozesscontroller (15) als Mehrgrössencontroller ausgebildet und zwei oder mehrere Signaleingänge entsprechender Sensoren aufweist, insbesondere von Dickensensoren, Sensoren für die Oberflächenbeschaffenheit der Werkstücke (3), für die Motorleistungsaufnahme(n), Durchlaufgeschwindigkeit der Werkstücke, sowie des Weckstückeinlaufes und Werkstückauslaufes und der Bandgeschwindigkeit(en) bzw. Schleifwalzengeschwindigkeit, und für die Qualitätstoleranz, ferner Eingänge für solche Werte, die vom Menschen selbst erfasst werden, wie Oberflächen-, Qualitätsund Dickenmessungen und für die Qualitätstoleranz. - Rechnersteuerung nach einem der Ansprüche 4 bis 7,
dadurch gekennzeichnet, dass die Startrezeptur wenigstens die Grundinformation für das Rohwerkstück (3) die, Zusammensetzung des Rohmaterials z.B. Dicke, Härte, Härte der Oberfläche, Schichtaufbau und Art des Rohmaterials wie Holz, Kunststoff, Gummi, Mineral usw. und Plattenrohdicke, femer wenigstens die Grundparamter für das geschliffene Erzeugnis, insbesondere die Oberflächenqualität als Finish, die Schleifqualität als Struktur, die Plattendicke sowie Dickentoleranz aufweist. - Rechnersteuerung nach einem der Ansprüche 4 bis 8,
dadurch gekennzeichnet, dass die Startrezeptur wenigstens eine oder mehrere der folgenden Bearbeitungsparameter aufweist, Leistungsaufnahme eines oder mehrerer Antriebsmotoren, die Durchlaufgeschwindigkeit der Werkstücke (3), die Bandgeschwindigkeit, die Schleifwalzengeschwindigkeit die Schleifbandstandzeit, bzw. den Schleifbandzustand, die Schleifbandtype, Schleifdruck, Drehmoment, Schleifschuherwärmung, Kreuzschliff. - Rechnersteuerung nach einem der Ansprüche 4 bis 9,
dadurch gekennzeichnet, dass sie Durchlaufüberwachmittel (4) aufweist, insbesondere zum Erfassen des Schleifbeginnes bzw. Platteneinlaufes sowie des Schleifendes bzw. Plattenauslaufes im Falle von Einzelwerkstücken (3), oder im Falle einer Bearbeitung von Endlosmaterial oder Stoss- an Stoss von Platten die entsprechenden Sensorsignale. - Rechnersteuerung- nach einem der Ansprüche 4 bis 10,
dadurch gekennzeichnet, dass die Startrezeptur wenigstens zwei oder mehrere Dickentoleranzregister aufweist, insbesondere für eine Grobtoleranz sowie eine Feintoleranz, femer eine Eingabemöglichkeit für frei zu definierende bzw. zu ändernde Toleranzbandbreite(n). - Rechnersteuerung für Breitschleifmaschine nach Anspruch 11,
dadurch gekennzeichnet, dass über die Rechnermittel (1-2) bei der ersten Platte (3) eines Schleifpostens ein Toleranzwert auf der sicheren Seite bzw. die grösstmögliche, noch zulässige Dicke für die Startrezeptur wählbar ist, derart, dass diese Platten (3) mit Überdicke in einem späteren Durchlauf auf die vom Kunden gewünschte Toleranz nachschleifbar ist. - Rechnersteuerung nach einem der Ansprüche 4 bis 12,
dadurch gekennzeichnet, dass sie eine Dickenmess- und Überwacheinrichtung vor der Kalibriereinheit bzw. der ersten Kalibriereinheit sowie eine Dickenmess- und Überwacheinrichtung (4) und/oder eine Prüfeinheit für die Oberflächengenauigkeit und Struktur nach der Feinschleifeinheit bzw. nach der letzten Feinschleifeinheit (2) aufweist. - Rechnersteuerung nach einem der Ansprüche 4 bis 13,
dadurch gekennzeichnet, dass sie Rückführmittel für geschliffene Platten (3) für einen nochmaligen Schliff aufweist; wobei die Rückführmittel sowohl kalibriergeschliffene wie feingeschliffene Werkstücke (3) übernehmen können. - Rechnersteuerung nach Anspruch 14,
dadurch gekennzeichnet, dass mehrere Arten von Rezepturen abspeicherbar sind, insbesonderea) laufend optimierbare Startrezepturen z.B. aufgrund des letzten vorangegangenengleichen Schleifauftrages oder Anfahrrezepturen;b) eine Testrezeptur als Startrezeptur bei der erstmaligen Bearbeitung eines neuen Schleifauftrages, oder Anfahrrezepturen;c) Schleifrezepturen, welche aufgrund eines vorangegangenen gleichen Scheifauftrages oder aufgrund einer Startrezeptur oder einer Testrezeptur wählbar ist. - Rechnersteuerung nach einem der Ansprüche 4 bis 15,
dadurch gekennzeichnet, dass in Werkstückvorschubrichtung in dem Bereich der beiden Seitenränder der Werkstücke (3) wenigstens je eine oder mehrere Dickenmess- bzw. Dickenüberwacheinrichtungen (4) angeordnet sind. - Rechnersteuerung nach einem der Ansprüche 1 bis 16,
dadurch gekennzeichnet, dass für die Bearbeitungsgrundeinstellungen Handeingabeeinrichtungen (14) vorgesehen sind, welche einzeln, vorzugsweise über entsprechende Hand-Stellglieder einstellbar, und bei Bedarf in der Rezeptur (13) registrierbar sind, wobei über die entsprechenden Handstellglieder wenigstens ein oder mehrere der folgenden Parameter wählbar sind, Schleifabnahme der Schleifeinheiten, Vorschub der Werkstücke, Schleifbandgeschwindigkeit, Schleifwalzengeschwindigkeit, Zustand des Schleifbandes, bzw. der Schleifwlaze Schleifdruck, Drehmoment, Schleifschuherwärmung. - Rechnersteuerung nach einem der Ansprüche 1 bis 17,
dadurch gekennzeichnet, dass alle wichtigen Parameter sowohl der Maschinenparameter wie der Prozessparameter visualisierbar sind, wobei entweder über die Rechnereingabetastatur (20) oder vor Ort einzelne Steltgrössen von Hand korrigierbar sind mit entsprechender Rückmeldung an den Rechner und die Visualisierung (22), wobei die übrigen veränderbaren Paramter im Automatikbetrieb über einen gegebenenfalls anpassbares Schleifrezept bzw. entsprechende Programme steuerbar sind. - Rechnersteuerung nach einem der Ansprüche 1 bis 18,
dadurch gekennzeichnet; dass über die Visualisierung die momentanen Werte in Bezug auf Zielgrössen angezeigt werden: insbesondere Schleifdruck, Schleifabnahme, Motorleistungsaufnahme, Dicken- sowie Oberflächentoleranzen, Schleifbandgeschwindigkeit, Schleifwalzengeschwindigkeit, Durchlaufgeschwindigkeit der Werkstücke, ferner Bilder aus der Schleifstrasse z.B. Beschickung der Schleifstrasse, Abstapelung, Absaugung, ferner Trendbilder, insbesondere bei Näherung an wichtige Ziel- oder Grenzwerte. - Rechnersteuerung nach einem der Ansprüche 1 bis 19,
dadurch gekennzeichnet, dass. eine oder mehrere der folgenden Parameter über untergeordnete Regeleinrichtungen kontrollierbar sind, Schleifabnahme, Werkstückvorschub, Schleifbandgeschwindigkeit, Schleifdruck. - Rechnersteuerung nach einem der Ansprüche 1 bis 20,
dadurch gekennzeichnet, dass bei plattenartigen Werkstücken (3) entsprechend der Werkstück- und Schleifparamter eine Werkstück-und Qualitätscodierung an-einem-seitlichen Plattenrand über einen Codedrucker anbringbar ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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CH246498 | 1998-12-11 | ||
CH246498 | 1998-12-11 | ||
PCT/CH1999/000597 WO2000035628A1 (de) | 1998-12-11 | 1999-12-10 | Verfahren zur steuerung des schleifprozesses sowie rechnersteuerung für breitschleifmaschine |
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EP1137512A1 EP1137512A1 (de) | 2001-10-04 |
EP1137512B1 true EP1137512B1 (de) | 2003-04-23 |
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EP99957827A Expired - Lifetime EP1137512B1 (de) | 1998-12-11 | 1999-12-10 | Verfahren zur steuerung des schleifprozesses sowie rechnersteuerung für breitschleifmaschine |
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Country | Link |
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EP (1) | EP1137512B1 (de) |
AT (1) | ATE238135T1 (de) |
AU (1) | AU1544400A (de) |
DE (2) | DE19915909C2 (de) |
WO (1) | WO2000035628A1 (de) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2000059678A1 (de) * | 1999-04-06 | 2000-10-12 | Siemens Aktiengesellschaft | Verfahren und vorrichtung zum schleifen eines gewalzten metallbandes |
US7160173B2 (en) | 2002-04-03 | 2007-01-09 | 3M Innovative Properties Company | Abrasive articles and methods for the manufacture and use of same |
US7089081B2 (en) | 2003-01-31 | 2006-08-08 | 3M Innovative Properties Company | Modeling an abrasive process to achieve controlled material removal |
DE102007048544A1 (de) * | 2007-10-09 | 2009-04-16 | Paul Ernst Maschinenfabrik Gmbh | Vorrichtung zum Schleifen von Werkstücken |
ITTV20090092A1 (it) * | 2009-05-13 | 2010-11-14 | Valmec Sas Di Rossi Claudia & C | Levigatrice-spazzolatrice per profili in legno. |
DE102012011288A1 (de) | 2012-06-08 | 2013-12-12 | Hochschule Ostwestfalen-Lippe | Verfahren der Herstellung von Schleifbändern |
CN103707003B (zh) * | 2012-09-29 | 2017-03-15 | 宁波江丰电子材料股份有限公司 | 钨钛合金板的加工方法 |
JP6310260B2 (ja) | 2014-01-20 | 2018-04-11 | 株式会社荏原製作所 | 基板処理装置内の複数の処理ユニットを調整するための調整装置、および該調整装置を備えた基板処理装置 |
DE102016116622A1 (de) * | 2016-09-06 | 2018-03-08 | Steinemann Technology Ag | Verfahren zur Überwachung eines Schleifprozesses |
DE102017110950B4 (de) * | 2017-05-19 | 2022-12-22 | Karl Heesemann Maschinenfabrik Gmbh & Co. Kg | Schleifmaschine zum Schleifen einer Oberfläche eines Objektes |
CN110153820B (zh) * | 2018-01-15 | 2020-12-22 | 日照金泰机械制造有限公司 | 一种高效导轨专用磨床及磨削方法 |
DE102019107694A1 (de) * | 2019-03-26 | 2020-10-01 | Homag Bohrsysteme Gmbh | Verfahren zum Betrieb einer Maschine |
IT201900015228A1 (it) * | 2019-08-29 | 2021-03-01 | Scm Group Spa | Macchina levigatrice con sistema di sicurezza contro l’eiezione di pannelli. |
DE102020119149A1 (de) | 2020-07-21 | 2022-01-27 | Karl Heesemann Maschinenfabrik Gmbh & Co. Kg | Verfahren zum Schleifen einer Oberfläche eines Werkstückes und Vorrichtung dazu |
DE102020125687A1 (de) * | 2020-10-01 | 2022-04-07 | Homag Gmbh | Vorrichtung und Verfahren zum Beschichten einer Oberfläche |
CN113478350B (zh) * | 2021-08-10 | 2022-11-15 | 重庆力劲机械有限公司 | 一种具有学习功能的智能化铸件打磨设备 |
EP4163056A1 (de) * | 2021-10-06 | 2023-04-12 | ARKU Maschinenbau GmbH | Vorrichtung und verfahren zum bereitstellen eines vorschlags zur optimalen einstellung einer blechbearbeitungsmaschine |
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DE2932269A1 (de) * | 1979-08-09 | 1981-02-26 | Kimwood Corp | Verfahren und vorrichtung zum kalibrieren und zur oberflaechenbehandlung von holz |
DE3316154C2 (de) * | 1983-05-03 | 1986-06-19 | Bison-Werke Bähre & Greten GmbH & Co KG, 3257 Springe | Bandschleifmaschine |
DE8707974U1 (de) * | 1987-06-04 | 1987-08-13 | Weber, Georg, 8640 Kronach | Bandschleifmaschine |
DE3826706A1 (de) * | 1988-08-05 | 1990-02-08 | Baehre & Greten | Schleifverfahren fuer plattenfoermige werkstuecke |
JP3071530B2 (ja) * | 1991-11-13 | 2000-07-31 | 日本ミクロコーティング株式会社 | 磁気ディスクのテクスチャー加工装置 |
DE9414952U1 (de) * | 1993-09-16 | 1994-11-17 | Ulrich Steinemann AG, St. Gallen | Breitschleifmaschine |
-
1999
- 1999-04-08 DE DE19915909A patent/DE19915909C2/de not_active Expired - Fee Related
- 1999-12-10 AU AU15444/00A patent/AU1544400A/en not_active Abandoned
- 1999-12-10 WO PCT/CH1999/000597 patent/WO2000035628A1/de active IP Right Grant
- 1999-12-10 DE DE59905238T patent/DE59905238D1/de not_active Expired - Lifetime
- 1999-12-10 EP EP99957827A patent/EP1137512B1/de not_active Expired - Lifetime
- 1999-12-10 AT AT99957827T patent/ATE238135T1/de not_active IP Right Cessation
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WO2000035628A1 (de) | 2000-06-22 |
DE59905238D1 (de) | 2003-05-28 |
EP1137512A1 (de) | 2001-10-04 |
DE19915909A1 (de) | 2000-06-21 |
DE19915909C2 (de) | 2003-05-28 |
ATE238135T1 (de) | 2003-05-15 |
AU1544400A (en) | 2000-07-03 |
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