EP3628458A1 - Dispositif et procédé d'usinage de pièces en bois, en matière plastique et analogue - Google Patents

Dispositif et procédé d'usinage de pièces en bois, en matière plastique et analogue Download PDF

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Publication number
EP3628458A1
EP3628458A1 EP19000415.0A EP19000415A EP3628458A1 EP 3628458 A1 EP3628458 A1 EP 3628458A1 EP 19000415 A EP19000415 A EP 19000415A EP 3628458 A1 EP3628458 A1 EP 3628458A1
Authority
EP
European Patent Office
Prior art keywords
workpiece
workpieces
transport direction
carriers
tool
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.)
Pending
Application number
EP19000415.0A
Other languages
German (de)
English (en)
Inventor
Jürgen REINGEN
Albrecht Dawidziak
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.)
Michael Weinig AG
Original Assignee
Michael Weinig AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Michael Weinig AG filed Critical Michael Weinig AG
Publication of EP3628458A1 publication Critical patent/EP3628458A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
    • B27C1/00—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor
    • B27C1/08—Machines for working several sides of work simultaneously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
    • B27C1/00—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor
    • B27C1/12—Arrangements for feeding work

Definitions

  • the invention relates to a device for machining workpieces made of wood, plastic and the like. According to the preamble of claim 1 and a method for machining workpieces made of wood, plastic and the like. According to the preamble of claim 11.
  • Raw workpieces are often bowl-shaped, which means that they are curved across their width and are also called workpieces with transverse distortion.
  • Such bowl-shaped workpieces are placed with their bulbous side facing upwards on the support of the device in the form of a support / dressing table and machined with upper and lower tools so that a workpiece with a rectangular cross section is produced. Slats can then be sawed out of it, for example by horizontal cuts. Due to the bulbous or bowl-shaped training, the waste of material is relatively high. Depending on the curvature of the workpiece, the chip removal must be set individually on the lower dressing tool so that the underside is machined cleanly.
  • the invention is based on the object of designing the generic device and the generic method in such a way that keyed workpieces can be machined with optimum wood savings and process reliability.
  • the device according to the invention has the two supports which extend parallel to one another in the transport direction and onto which the bowl-shaped workpiece is placed with its bulbous side facing downward.
  • the top of the carrier is the reference point for chip removal on the workpiece using the dressing tool.
  • the bowl-shaped workpieces are placed on the supports in such a way that the workpieces rest on the supports only in the right and left outer edge region of their undersides near the right and left long sides.
  • the workpiece with the belly facing down is exposed between the supports. The least amount of chip removal takes place in this edge area. Due to this design of the device, very little material is automatically removed from the workpiece.
  • the workpiece can thus be processed cleanly and evenly with minimal material removal on its underside and top side, so that, for example, a maximum number of lamellae can be removed from the finished workpiece.
  • a maximum number of lamellae can be removed from the finished workpiece.
  • only one adjustment of the chip removal is necessary because the supports of the device are always positioned in such a way that the workpiece rests on the supports adjacent to its long sides. This enables optimal chip removal on the underside of the workpiece while saving material. Only as little material is automatically removed from the workpiece as is required to create the flat underside of the workpiece, regardless of the strength of the keying of the workpiece.
  • the flat underside of the workpiece forms the reference surface for the subsequent further processing of the workpiece.
  • the carriers advantageously extend almost to the lower dressing tool. In the direction of transport of the workpieces behind the lower dressing tool, the carriers are no longer necessary because so much material has been removed from the machined workpiece with the lower dressing tool that the underside of the workpiece is flat.
  • the thickness of the carrier is advantageously chosen so that it is greater than the maximum keying of the workpiece. This ensures that the workpiece lies freely between the supports when it is supported on the edge.
  • the carriers are advantageously adjustable in the height direction. This means that the amount of chip removal on the underside of the workpiece can be set correctly using the lower dressing tool.
  • At least one carrier is adjustable transversely to the transport direction. Then the carriers can be easily adapted to workpieces of different widths.
  • Both carriers are advantageously adjustable transversely to the direction of transport.
  • the carriers can be designed in the form of support rails on which the workpieces are transported.
  • the support rails can advantageously be provided on a stand or the like.
  • the carriers can be support strips which are provided on a dressing table.
  • the carriers it is also possible for the carriers to be provided as webs or ridges on a dressing table itself.
  • the carriers can advantageously be exchangeable, so that, for example, there is the possibility of attaching carriers of different heights depending on the degree of capping.
  • the carriers advantageously protrude beyond the dressing table in the transport direction. This protrusion is advantageously chosen so that the carriers reach close to the flight circle of the dressing tool.
  • At least one pressure element is advantageously provided in the area of the dressing tool, which acts on the workpiece and thereby presses it against the carrier.
  • a freely rotatable pressure roller can advantageously be used as the pressure element.
  • the pressure element lies under the appropriate pressure on the machined workpiece to be machined.
  • the pressing force can be generated by spring force, by pneumatic pressure and the like.
  • the device is provided in the transport direction at a distance after the lower dressing tool with an upper tool which is rotatably driven about a horizontal axis and removes the excess on the top of the workpiece.
  • the lower and the upper tool are advantageously designed as planing tools.
  • the two tools can be used to create a flat, smooth top and bottom surface on the workpiece.
  • a right and a left tool are provided, each of which is driven about a vertical axis.
  • the long sides of the workpiece can be machined, in particular planed smooth, as it passes through the device.
  • the right-hand carrier in the transport direction is adjustable transversely to the transport direction, advantageously coupled to a ruler which is adjustable transversely to the transport direction.
  • the chip removal on the right long side of the workpiece is set by the right vertical tool. If the right beam is coupled to the ruler, the right beam is also adjusted at the same time as the ruler is adjusted.
  • the method according to the invention is characterized in that the bowl-shaped workpiece, with its curvature pointing downward, is placed on the carrier near its long sides and is transported in this position in the transport direction through the device to the lower dressing tool.
  • This position of the workpiece and the support only in its right and left edge area means that only a small amount of material has to be removed in order to achieve the finished workpiece.
  • the workpiece is advantageously transported along its right-hand side in the direction of transport along a ruler.
  • Reliable transport of the workpiece through the device is advantageously achieved when the workpiece is pressed onto the carrier with transport rollers.
  • the carriers are advantageously set transversely to the transport direction in such a way that the workpiece rests on the carriers close to its long sides.
  • the removal of chips by the lower dressing tool is minimal in this edge area.
  • elongated workpieces 1 made of wood, plastic and the like are planed straight and level as they pass through the device.
  • the workpieces 1 are transported in the longitudinal direction in the transport or feed direction 2 through the device and processed in the manner to be described during their passage.
  • the workpieces 1 usually have a rectangular cross-section after processing.
  • the workpieces 1 are transported lying in the transport direction 2 on a dressing / infeed table 3 (hereinafter called dressing table) into the device.
  • dressing table a dressing / infeed table 3
  • the workpieces 1 rest with their longitudinal side 4 on the right in the transport direction 2 on a joining ruler 5, which preferably extends along the one edge of the dressing table 3 in the transport direction 5.
  • Transport rollers 6 are provided to advance the workpieces 1 and are arranged distributed over the length of the device. They are rotatably driven and are under pressure on the top of the workpieces 1. The transport rollers 6 are advantageously pressed onto the workpieces 1 by means of pneumatic pressure. As a result, the workpieces 1 are reliably transported through the device and can be processed properly using the appropriate tools.
  • the dressing table 3 is adjustable in the height direction in order to adjust the chip removal on the underside of the workpiece 1.
  • the dressing table 3 can be linearly adjustable in the vertical direction. It is also possible to adjust the dressing table 3 obliquely in the height direction. Depending on the adjustment device, the dressing table 3 can also be adjustable in the vertical direction along its arc. Here, the dressing table 3 is mounted by swinging. In Fig. 3 are these different adjustment directions of the dressing table 3 are indicated by corresponding arrows.
  • the workpieces 2 pass from the dressing table 3 to a machine table 7, on which the workpieces 1 rest with their underside during their transport through the device. When they are fed, the workpieces 1 rest in the area of the machine table 7 with their right longitudinal side 4 against a right stop 8 which extends along the machine table 7 in the feed direction 2.
  • a dressing tool 9 which is rotatably driven about a horizontal axis and with which the underside of the workpiece 1 is machined.
  • the dressing table 3 and the machine table 7 are at such a distance from one another that the underside of the workpiece 1 can be machined by the dressing tool 9.
  • two pressure rollers 10 lying next to one another at the same height are provided, each of which rests under pressure on the upper side of the workpiece 1.
  • the pressure rollers 10 are advantageously spring-loaded. It is not necessary to drive the pressure rollers 10. They are driven by the workpiece 1 as it rotates about its horizontal axes by friction.
  • the pressure rollers 10 are advantageously located near the two long sides 4, 11 of the workpiece 1.
  • a safe transport of the workpiece 1 in the region of the dressing tool 9 is advantageous.
  • the device is therefore at a short distance in front of and behind the dressing tool 9 in the transport direction 2 seen, transport rollers 6, which ensure that the workpiece 1 is reliably fed to the dressing tool 9 and then transported further.
  • the device In the direction of transport 2 at a distance behind the dressing tool 9, the device has a right tool 12 which is rotatably driven about a vertical axis and with which the longitudinal side 4 of the workpiece 1, which is on the right in the direction of transport 2, is machined as it passes through the device.
  • the device In the transport direction 2 at a distance behind the right tool, the device is provided with a left tool 13, which is also rotatably driven about a vertical axis and with which the left long side 11 of the workpiece 1 is machined as it passes through.
  • Transport rollers 6 are advantageously provided in the transport direction 2 before and after the left tool 13, with which the workpiece 1 can be reliably transported past the tool 13.
  • an upper tool 14 is provided at a distance behind the left tool 13 and is driven to rotate about a horizontal axis.
  • the device in the direction of transport 2 has a lower tool 15 behind the upper tool 14, which is rotatably driven about a horizontal axis and with which the underside of the workpiece 1 is machined.
  • the machine table 7 is interrupted in the area of this lower tool 15, so that the tool 15 can machine the underside of the workpiece.
  • the dressing table 3 there are at least two elongate supports lying parallel to one another, which in the exemplary embodiment are provided as support strips 16 and 17 ( Fig. 2 and 4th ) are formed on which the workpiece 1 at its Feed rests. Both support strips 16, 17 extend in the feed direction 2 and at a distance from one another. Since the joining ruler 5 is adjustable transversely to the transport direction 2 in accordance with the required chip removal on the right longitudinal side 4 of the workpiece 1, in this case the right support bar 16 is advantageously also adjusted accordingly. This is advantageously done together with the ruler adjustment.
  • the other support bar 17 is adjustable transversely to the transport direction 2 on the dressing table 3 (arrow 18 in Fig. 2 ), so that the position of this support bar 17 can be adjusted according to the width of the workpiece 1.
  • the support strips 16, 17 extend as from Fig. 1 emerges, only over part of the length of the dressing table 3. In deviation from the exemplary embodiment shown, the two support strips 16, 17 can of course also extend over the entire length of the dressing table 3.
  • the support strips 16, 17 advantageously protrude slightly above the dressing table 3 in the transport direction 2. How in particular Fig. 3 shows, the support strips 16, 17 extend close to the dressing tool 9, so that good guidance of the workpiece 1 is ensured and the occurrence of impacts is minimized.
  • pressure rollers 10 are arranged in such a way that they load the end of the workpiece 1 projecting beyond the dressing table 3 in the transport direction 2 against the support strips 16, 17 ( Fig. 3 ). This ensures that the dressing tool 9 engages securely in the workpiece 1.
  • the support strips 16, 17 are arranged on the dressing table 3 in such a way that they are adjusted together with the latter for setting the chip removal. In the transport direction 2 they are not adjustable relative to the dressing table 3.
  • at least the left support bar 17 is advantageously adjustable or positionable on the dressing table 3 to adapt to different workpiece widths transversely to the transport direction 2 or can be fastened thereon at different positions.
  • the adjustment can take place together with the setting of the left tool 13, which is set anyway to the desired finished width of the workpieces.
  • the support strips 16, 17 serve to support bowl-shaped workpieces 1 on the dressing table 3.
  • the workpieces 1 are placed in such a way that they lie on the support strips 16, 17 with their belly facing downwards near their longitudinal sides 4, 11 running in the transport direction 2 . Since the support bar 17 is adjustable transversely to the transport direction 2, the distance between the two support bars 16, 17 from one another can easily be adapted to the width of the workpieces 1.
  • the workpieces therefore lie on the support strips 16, 17 in a defined right and left outer / edge area of their underside, regardless of their width. The workpiece is exposed between the support strips 16, 17.
  • the support strips 16, 17 are only so thick that the bowl-shaped workpiece 1, with its underside 19 curved in the direction of the dressing table 3, does not rest on the dressing table 3 between the support strips 16, 17, but is at a short distance. Also in the transport direction 2 in front of the support bars 16, 17, the top of the dressing table 3 is at a distance from the tops of the support bars 16, 17, as a result of which the workpiece 1 can also be exposed in this area when it is fed into the machine by the feed rollers 6 and pressure rollers 10 is pressed onto the support strips 16, 17.
  • the support strips 16, 17 advantageously have a run-up slope at their front end, as seen in the transport direction 2, so that the workpieces 1 can be fed in easily and automatically if required.
  • Fig. 4 the initial shape of the bowl-shaped workpieces 1 is shown with solid lines.
  • the bowl-shaped workpieces 1 are machined so that they have mutually parallel and flat top and bottom sides, as shown in Fig. 4 is indicated by the dashed line.
  • the device it is possible to machine bowl-shaped workpieces 1 with little chip removal into workpieces with a rectangular cross section.
  • the workpieces 1 processed in this way can then be sawn into thin slats, for example, the width of which corresponds to the width of the workpiece.
  • the division of the workpiece 1 into the lamellae can take place in a conventional manner, for example with the aid of rip saws.
  • the bowl-shaped workpieces 1 lie linearly near their longitudinal edges on the support strips 16, 17 ( Fig. 4 ).
  • the top of the support strips 16, 17 defines the chip removal on the dressing tool 9. This is shown by Fig. 5 explained in more detail.
  • Figure a the Fig. 5 shows a less strongly bowl-shaped workpiece 1, which rests near its longitudinal sides 4, 11 on the symbolically represented support strips 16, 17.
  • the machined workpiece 1 is planed on the upper and lower sides in such a way that the workpiece 1 shown in FIG. B has a rectangular cross section. Due to the minimal chip removal on the bottom 19, sufficient material is available for processing the top.
  • the workpiece 1 according to Fig. 5c is more dished than the workpiece Fig. 5a .
  • the upper edge of the support strips 16, 17 determines the chip removal on the underside 19.
  • so much material becomes on the upper and on the underside of the workpiece 1 accepted that the resulting workpiece according to Fig. 5d has the rectangular cross section shown.
  • the two exemplary embodiments show that the set chip removal with the dressing tool 9 automatically only removes as little material from the workpiece 1 as is required to generate the reference surface which is formed by the underside of the workpiece 1. This slight decrease in material occurs regardless of the thickness of the workpiece 1.
  • the reference surface on the workpiece is created by a clean planing process and is straight or even over its surface. Due to the optimal minimum chip removal on the underside of the workpiece 1 with the dressing tool 9, there is always an optimal amount of material available for machining the top side. This results in a very large saving in wood. The excess material is removed with the tool 14 on the workpiece 1. Given a predetermined thickness of the finished workpieces 1 ( 5b and 5d ) is in the upper area of a workpiece 1 that has not been roughed Fig. 5a ) A lot of material is available, which is removed with the tool 14. However, the upper side of a strongly keyed workpiece 1 is also planed more reliably and with a higher probability, as in FIG Fig. 5c becomes clear. For the different thicknesses of the workpieces 1, only a single valid setting of the chip removal of the dressing tool 9 is necessary.
  • the procedure described has the result that the number of cleanly planed workpieces 1 in general and, for example, the number of so-called good lamellae, which are later sawn out horizontally from the workpiece 1, are considerably increased.
  • the finished thickness of the planed workpieces 1 can be variable. Then the workpiece 1 is scanned from above, advantageously in the area just behind the dressing tool 9. After the material has been removed from the underside of the workpiece by the dressing tool 9, the workpiece 1, with its now flat underside, reaches the machine table 7, on which the workpiece 1 is then fed to the further tools 12 to 15. Due to the planed smooth underside, the workpiece 1 is guided cleanly on the machine table 7.
  • the tool 14 is adjusted in the vertical direction so that only a minimal chip removal is carried out on the upper side of the workpiece in order to achieve a planed flat surface.
  • the tool 14 is at a sufficiently large distance from the dressing tool 9 so that the tool 14 can be reliably adjusted to the position required for chip removal on the workpiece 1 before the workpiece 1 has reached the upper tool 14.
  • the support strips 16, 17 have a length of 0.5 m, for example, and project above the dressing table 3 in the manner described.
  • the thickness or thickness of the support strips 16, 17 is greater than the maximum keying of the workpieces 1 to be expected. A thickness of approximately 6 mm is usually sufficient for the support strips 16, 17.
  • the support strips 16, 17 have a width of approximately 30 mm. Since both support strips 16, 17 can advantageously be adjusted transversely or perpendicularly to the transport direction 2, they can be positioned on the dressing table 3 in such a way that the support lines of the machined workpiece 1 are as close as possible to the long sides 4, 11 thereof. The support lines are selected so that the workpiece 1 rests securely on the support strips 16, 17.
  • the workpieces 1 are adjusted vertically with the help of the dressing table 3 so that the dressing tool 9 can remove material from the curved underside 19 thereof over the entire width of the workpiece.
  • the transport rollers 6 are like that Fig. 1 , 2nd and 4th show by way of example, arranged in two tracks and lie essentially in the area above the support strips 16, 17.
  • the pressure rollers 10 are advantageously arranged in the area above the support strips 16, 17 in the area of the dressing tool 9. This minimizes impacts.
  • the transport rollers can also extend over the full maximum working width of the machine.
  • bowl-shaped workpieces 1 can be processed with the greatest possible saving of wood and process reliability, for example for further processing with a rip saw.
  • a full-surface reference surface for a rip saw is generated on workpiece 1. Since the bowl-shaped workpieces are placed with their belly downward in the direction of the dressing table 3 on the support strips 16, 17, an automatic adaptation to workpieces 1 with different strengths is given. For example, a maximum number of lamellae can be removed from the finished workpiece with minimal chip removal on the reference surface.
  • the support strips 16, 17 are only one example of an increased support that is on the dressing table 3 is provided. Ridges or ridges can also be provided as supports on the dressing table 3 itself, on which the machined workpiece 1 rests in the manner described.
  • the top of the carriers 16, 17 is the reference point for the chip removal with the dressing tool 9. This is determined by the vertical distance between the top of the stationary machine table 7 and the top of the carriers 16, 17.
  • the dressing tool 9 is set in the vertical direction with its radius of flight circle to the top of the machine table 7 and at one level.
  • the chip removal can be set to a minimum value because the workpieces 1 lie in the area near their outer longitudinal sides 4, 11 at locations on the support strips 16, 17 where the smallest chip removal must take place. As a result, the workpieces 1 are always clean and planed on the bottom and the top.
  • the carriers 16, 17 are, for example, rail-shaped and are mounted on one or two stands. They are adjustable in height. At least the right carrier 17 can be adjusted on or together with the stand transversely to the transport direction, so that the distance between the carriers 16, 17 can be adjusted to the workpiece width.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Milling, Drilling, And Turning Of Wood (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
EP19000415.0A 2018-09-28 2019-09-18 Dispositif et procédé d'usinage de pièces en bois, en matière plastique et analogue Pending EP3628458A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018007823.0A DE102018007823A1 (de) 2018-09-28 2018-09-28 Vorrichtung und Verfahren zum Bearbeiten von Werkstücken aus Holz, Kunststoff und dgl.

Publications (1)

Publication Number Publication Date
EP3628458A1 true EP3628458A1 (fr) 2020-04-01

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Application Number Title Priority Date Filing Date
EP19000415.0A Pending EP3628458A1 (fr) 2018-09-28 2019-09-18 Dispositif et procédé d'usinage de pièces en bois, en matière plastique et analogue

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EP (1) EP3628458A1 (fr)
DE (1) DE102018007823A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB874827A (en) * 1960-04-25 1961-08-10 Stockamoellans Aktiebolag Improvements in or relating to wood working machines
DE1920547U (de) * 1965-04-23 1965-07-29 Alfred Harbs K G Maschinenfabr Abrichtmaschine.
US20110226384A1 (en) * 2010-03-18 2011-09-22 Kinsler Michael J Planer clamp assembly
DE102010019858A1 (de) * 2010-05-07 2011-11-10 Flooring Technologies Ltd. Förderanlage für im Wesentlichen flache Gegenstände, insbesondere Laminatpaneele

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB874827A (en) * 1960-04-25 1961-08-10 Stockamoellans Aktiebolag Improvements in or relating to wood working machines
DE1920547U (de) * 1965-04-23 1965-07-29 Alfred Harbs K G Maschinenfabr Abrichtmaschine.
US20110226384A1 (en) * 2010-03-18 2011-09-22 Kinsler Michael J Planer clamp assembly
DE102010019858A1 (de) * 2010-05-07 2011-11-10 Flooring Technologies Ltd. Förderanlage für im Wesentlichen flache Gegenstände, insbesondere Laminatpaneele

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