Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
  • B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
  • B23D47/04—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of devices for feeding, positioning, clamping, or rotating work
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
  • B27B27/00—Guide fences or stops for timber in saw mills or sawing machines; Measuring equipment thereon
  • B27B27/04—Guide fences or stops for timber in saw mills or sawing machines; Measuring equipment thereon arranged perpendicularly to the plane of the saw blade
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
  • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
  • B27B5/02—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor characterised by a special purpose only
  • B27B5/06—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor characterised by a special purpose only for dividing plates in parts of determined size, e.g. panels
  • B27B5/065—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor characterised by a special purpose only for dividing plates in parts of determined size, e.g. panels with feedable saw blades, e.g. arranged on a carriage

Definitions

• the present invention is relative to a panel cutting machine.
• patent no. EP-Bl-0 963 270 (Giben) describes a cutting machine equipped with special clamping devices provided with expensive drives and suitable numerical controls; these clamping devices are mounted on the single panel positioning pusher available and feature the possibility to have a degree of motion along the pusher crossbeam, besides being able to move forward and backward relative to the pusher crossbeam itself, on which they are mounted.
• the additional drives on the single clamping devices are suited to permit different positioning arrangements among the panels being processed, so as to simultaneously perform the transverse cutting of the panels themselves.
• the problem of the differentiated cutting process is solved by adopting a second panel positioning pusher, which is completely independent of the main one, so as to simultaneously cut groups of strips comprising sizes that are differentiated in terms of length, without any restriction.
• the main object of the present invention is to find an economical and flexible cutting machine, which can permit the simultaneous execution of cutting patterns with two or more groups of differentiated strips through the use of a single pusher equipment, which is provided with a single drive for the positioning of all the different panels and with a single electronic control device.
• a cutting machine is provided according to Claim 1 or to any of the Claims that directly or indirectly depend on Claim 1.
• FIG. 1 shows a plan view of a cutting machine according to the present invention
• figure 2 shows a plan view of some enlarged details of the cutting machine of figure 1;
• FIG. 3 shows a longitudinal section (A-A) of the cutting machine shown in figures 1 and 2;
• FIG. 4 shows a plan view of a first differentiated cutting pattern for a panel or a stack of panels, which can be performed with the cutting machine as per figures 1, 2, and 3;
• figure 5 shows a plan view of a portion of the cutting machine according to figures 1, 2, and 3 in a first configuration, in which the machine carries out a first panel or panel stack positioning step according to the first differentiated cutting pattern shown in figure 4;
• figure 6 shows a plan view of a portion of the cutting machine according to figures 1, 2, and 3 in a second configuration, in which the machine carries out a second panel or panel stack positioning step according to the first differentiated cutting pattern shown in figure 4;
• figure 7 shows a plan view of a portion of the cutting machine according to figures 1, 2, and 3 in a third configuration, in which the machine carries out a third panel or panel stack positioning and cutting step according to the first differentiated cutting pattern shown in figure 4;
• FIG. 8 shows a plan view of a portion of the cutting machine according to figures 1, 2, and 3, in which the machine carries out a step of the panel or panel stack processing cycle according to a second differentiated cutting pattern;
• FIG. 9 shows a plan view of a portion of the cutting machine according to figures 1, 2, and 3, in which the machine carries out a step of the panel or panel stack processing cycle according to a third differentiated cutting pattern;
• FIG. 10 shows a plan view of a portion of the cutting machine according to figures 1, 2, and 3, in which the machine carries out a step of the panel or panel stack processing cycle according to a fourth differentiated cutting pattern;
• FIG 11 shows a plan view of a portion of the cutting machine according to figures 1, 2, and 3, in which the machine carries out a step of the panel or panel stack processing cycle according to a fifth differentiated cutting pattern.
• the reference (MS) indicates, as a whole, a cutting machine according to the present invention.
• the cutting machine (MS) is of the horizontal type and has a mobile carriage (CM) carrying the cutting tools (UT), which is able to slide along a guiding base (B) (figure 3) according to a direction identified by an axis (X) (figure 1).
• CM mobile carriage
• UT cutting tools
• B guiding base
• X axis
• the mobile carriage (CM) is suited to move according to directions and paths that are defined by the arrows (Fl) and (F2) (figure 1), which are parallel to the above-mentioned axis (X).
• the cutting tools (UT) are raised above a base working surface (PB) along the base (B) (figure 3), whereas they are lowered during the step in which they 5 return to the cut starting position.
• the cutting tools (UT) which are generally two, namely a cutting tool and an incision tool, slide inside a cutting slit obtained on the base working surface (PB), whose middle line is generally defined as cutting line (LT) (figures 1, 3).
• an upper pressing device which is of the known type, is suited to firmly clamp the panels (P) during the cutting step by means of a vertical movement of the known type.
• the pressing device (PS) is always in a raised position.
• the cutting machine is equipped with a single panel positioning pusher (S) (moved by a drive (MTT) of the known type (figure 1)), which slides, for example, on two lateral fixed beams (TGI), (TG2) and according to a single movement that is orthogonal to the cutting line (LT) in accordance with the direction defined by
• S panel positioning pusher
• MMTT moving by a drive
• TGI lateral fixed beams
• LT lateral fixed beams
• the working table (PL), the lateral fixed beams (TGI), (TG2), the support uprights (M T1), (M T2), (MNT3), (MNT4), the transverse beam (TT), and the base (B) are part of a more general frame
• the pusher (S) comprises, in the solution shown, a pusher crossbeam (TS), which has a useful length (LTS) that is approximately equal to the length (LLT) of the cutting line (LT), but, in other solutions that are not shown, could also have a smaller useful length.
• LLT useful length
• the pusher crossbeam (TS) extends in a direction that is parallel to the above-mentioned axis (X) and to the above-mentioned cutting line (LT).
• fixed clamps of the known type to clamp
• transport and position to size the panels (P) to be cut which can be manually loaded by operators onto front tables (PA) of the cutting machine (MS) or can be loaded from the rear or lateral side by means of automated systems of the known type.
• working table (PL) means the assembly of a plurality of support bars (BS), of a base working surface (PB) (figure 3), and of the front tables (PA).
• the bars (BS) are made of a ferrous material and are coated, in their upper part, with a layer of non scratching material.
• These bars (BS) are provided with suitable grooves to house the lower fingers of the clamps used to clamp the panels (P).
• the pusher (S) is also provided with at least one mobile clamping and/or pushing device, which hereinafter will be referred to as mobile clamp (PMl), (PM2), (PM3) and is suited to clamp, transport and position to size the panels (P) as well.
• mobile clamp PMl
• PM2 mobile clamp
• PM3 mobile clamp
• Each mobile clamp (PMl), (PM2), (PM3) is fixed, in this particular case, to the pusher crossbeam (TS) by means of a support and guiding system, which respectively consists of sliding blocks (PG1), (PG2), (PG3) (figures 2, 3), which are integral to the pusher crossbeam (TS) itself, and of a respective guide (Gl), (G2), (G3), which is integral to a respective carriage (CR1), (CR2), (CR3) of each respective mobile clamp (PMl), (PM2), (PM3) (figures 2, 3).
• each mobile clamp (PMl), (PM2), (PM3) can be moved in its operating position on the working table (PL) along a straight path having a stroke-start point (IC) (figure 3) and a stroke- end point (FC), which determine a total useful stroke on the respective guide (Gl), (G2), (G3); this straight path is parallel to an axis (Y) that is perpendicular to the above-mentioned axis (X) (figure 1) and, thus, is also parallel to the working table (PL) and perpendicular to the pusher crossbeam (TS).
• IC stroke-start point
• FC stroke- end point
• each mobile clamp (PMl), (PM2), (PM3) is not provided with an autonomous drive of its own and, therefore, it is freely mobile along the above-mentioned straight path relative to the pusher (S) on which it is mounted.
• each mobile clamp (PMl), (PM2), (PM3) is arranged within the useful length (LTS) of the pusher crossbeam (TS) of the pusher (S) and how this support and guiding system is substantially centred relative to the mobile clamp (PM1), (PM2), (PM3), thus permitting an optimal guiding condition without torsional effects and guaranteeing, furthermore, the best sliding movement possible of each mobile clamp (PM1), (PM2), (PM3) relative to the pusher (S) itself.
• this support and guiding system is the best solution to allow each mobile clamp (PM1), (PM2), (PM3) to freely slide, in its operating position lowered on the working table (PL) and therefore during the positioning phase of the panel (P), forward (F3) and backward (F4) in relation to the pusher itself (S) on which the mobile clamps (PM1), (PM2), (PM3) are mounted, according to a movement that is orthogonal to the cutting line ⁇ IT).
• these mobile clamps (PM1), (PM2), (PM3), similarly to the fixed clamps (PF), can be raised and removed, by being raised, from their operating position lowered on the working table (PL) by means of actuators of the known type.
• (PM1), (PM2), (PM3) are each provided with a relative locking device, (DB1), (DB2), (DB3) respectively (figures 2, 3), of the known type, which acts upon a respective guide (Gl), (G2), (G3), so that each mobile clamp (PM1), (PM2), (PM3) can be caused to be integral with the pusher (S) and, in particular, with the pusher crossbeam (TS) in any desired point of its useful working stroke along said respective guide (Gl), (G2), (G3).
• DB1, (DB2), (DB3) respectively (figures 2, 3), of the known type, which acts upon a respective guide (Gl), (G2), (G3), so that each mobile clamp (PM1), (PM2), (PM3) can be caused to be integral with the pusher (S) and, in particular, with the pusher crossbeam (TS) in any desired point of its useful working stroke along said respective guide (Gl), (G2), (G3).
• the locking device is centred relative to load to which the mobile clamp (PM1), (PM2), (PM3) is subject, thus allowing a greater effectiveness of the locking action.
• each single mobile clamp (PMl), (PM2), (PM3) with respective and further locking systems (SB11), (SB12), (SB13) (figures 2, 3), which, in particular, are fixed to the pusher crossbeam (TS) and, by means of respective centering pins (CP) acting upon respective seats (not shown) provided on the mobile clamps (PMl), (PM2), (PM3), cause the mobile clamps (PMl), (PM2), (PM3) to be further integral to the pusher crossbeam (TS), when the mobile clamp/s (PMl), (PM2), (PM3) itself/themselves is/are perfectly aligned relative to the other fixed clamps (PF) mounted on the same pusher crossbeam (TS).
• This allows the machine to carry out cutting patterns that involve the use of one or more mobile clamps (PMl), (PM2), (PM3) together - or aligned - with the fixed clamps (PF) (see below).
• the cutting machine (MS) is also equipped, in the are above the cutting line (LT), with a selective locking system, respectively (SB31), (SB32), (SB33) to selectively firmly clamp the panels (P) against the base working surface (PB) lying underneath, so as to perfectly hold them in position while a specific working cycle of the pusher (S) is being performed.
• a selective locking system respectively (SB31), (SB32), (SB33) to selectively firmly clamp the panels (P) against the base working surface (PB) lying underneath, so as to perfectly hold them in position while a specific working cycle of the pusher (S) is being performed.
• the locking systems (SB31), (SB32), (SB33) can be mounted on a fixed beam, which is arranged in the upper part close to the cutting line (LT) and is part of the frame (TL), or they can be directly mounted on the upper pressing device (PS), remaining anyway independent, from a functional point of view, of the upper pressing device (PS) itself.
• This further locking system (SB21), (SB22), (SB23) of each mobile clamp (PMl), (PM2), (PM3) fulfils a function corresponding to the one described above with reference to the possibility to directly lock the panel (P), or the stacks of panels, or the above-mentioned strips (SI), (S2), (S3) on the working table (PL), once the desired position/s has/have been reached.
• This cutting pattern is generally performed, first of all, by cutting, in the right hand area of the cutting machine (MS) shown in figure 1, the three strips (SI), (S2), (S3), using, for the different positioning to size operations, the fixed clamps (PF) of the pusher (S).
• the mobile clamps (PM1), (PM2), (PM3), during this step, are integral to the pusher crossbeam (TS) by means of the respective locking devices (DB1), (DB2), (DB3) (figures 2, 3) or, if necessary, by means of the locking systems (SB11), (SB12), (SB13) that guarantee a perfect alignment of the mobile clamps (PM1), (PM2), (PM3) with the fixed clamps (PF).
• the alignment of the mobile clamps (PM1), (PM2), (PM3) with the fixed clamps (PF) can also be obtained by means of predetermined stops (not shown), against which the different mobile clamps (PM1), (PM2), (PM3) can be positioned, in order to be then locked in position by means of the respective locking devices (DB1), (DB2), (DB3).
• the mobile clamp (PM1) is suited to position the strip (SI)
• the mobile clamps (PM2) and (PM3) are suited to position the strip (S2)
• the fixed clamps (PF) are suited to position the strip (S3).
• the pusher (S), with all the strips (SI), (S2), and (S3) firmly clamped by the respective clamps (PM1), (PM2), (PM3), (PF), will perform the first positioning to size operation, by positioning the cut (Cll) of the strip (SI) on the cutting line (LT), as shown in figure 5.
• the respective locking system (SB31) acting upon the strip (SI) is activated, so as to firmly lock the latter on the working table (PL) and relative to the cutting line (LT).
• the mobile clamp As an alternative thereto - or in combination therewith, the mobile clamp
• the pusher (S) in this specific case, will move backward, thus causing both the strip (S2) and the strip (S3) to move backward, as well, until the correct positioning of the cut (C21) of the strip (S2) on the cutting line (LT) is reached.
• the mobile clamps (PM2) and (PM3) are caused to be integral to the working table (PL) by means of the corresponding locking systems (SB22), (SB23), since, as already discussed above, this would lead to the same result of indirectly locking the strip (S2) relative to the cutting line (LT).
• the mobile clamps (PM1), (PM2), (PM3) are devices that do not need a specific drive of their own; this means that all the positions of the mobile clamps (PM1), (PM2), (PM3), both the absolute ones relative to the cutting line (LT) and the ones relative to the pusher (S), can be obtained only by means of the drive (MTT) of the pusher (S) on which the mobile clamps (PM1), (PM2), (PM3) are mounted.
• the pusher (S) in this specific case, will move backward, thus causing the strip (S3) to move backward, until it reaches its correct positioning on the cut (C31) provided.
• the strip (SI) and the strip (S2) will remain in the previous positions arranged on the cut (Cll) and on the cut (C21), respectively.
• the three cuts (Cll), (C21) and (C31) are aligned on the cutting line (LT) according to the cutting pattern of figure 4 and, therefore, the simultaneous cutting operation can be performed by lowering the pressing device (PS) (figure 3) onto the panels (P) and by activating the cutting stroke of the saw carriage (CM) (figure 3) with the cutting tools (UT) in a raised position.
• PS pressing device
• CM saw carriage
• a step might be provided, in which a mobile clamp, for example the clamp (PMl) is locked in a cutting position, whereas the other clamps (PM2), (PM3) and (PF) perform the positioning to size steps.
• a mobile clamp for example the clamp (PMl) is locked in a cutting position, whereas the other clamps (PM2), (PM3) and (PF) perform the positioning to size steps.
• positioning and cutting steps can be performed only on some strips of the cutting pattern, keeping the others locked. This does not lead to any delay in the total cutting cycle, since it is the strip with the highest number of cuts that determines the global time of the cutting cycle.
• the fixed clamps (PF) can be positioned in front of the mobile clamps (PMl), (PM2), (PM3) relative to the cutting line (LT).
• This feature permits the execution of cutting patterns in which the length of the panels to be obtained by means of the fixed clamps (PF) is greater than the length of the panels to be obtained on the strip or on the strips positioned by means of the mobile clamps (PMl), (PM2), (PM3).
• the mobile clamps (PMl), (PM2), (PM3) are designed so that the front reference face for the panels of the mobile clamps (PMl), (PM2), (PM3) themselves can be moved backward relative to the same front reference face for the panels of the fixed clamps (PF). Nevertheless, even without this possibility, namely with the mobile clamps (PMl), (PM2), (PM3) simply overhanging the fixed clamps (PF), the type of cycle described above is still possible, even though with a smaller degree of flexibility.
• Figure 9 shows a differentiated cutting pattern with two differentiated strips, in which the mobile clamps (PM2) and (PM3) are integral to the pusher crossbeam (TS) and are aligned with the fixed clamps (PF) for the entire cutting cycle, since only the mobile clamp (PMl) is involved in the execution of the single differentiated strip close to the square fence (SQ).
• the mobile clamps (PM2) and (PM3) are integral to the pusher crossbeam (TS) and are aligned with the fixed clamps (PF) for the entire cutting cycle, since only the mobile clamp (PMl) is involved in the execution of the single differentiated strip close to the square fence (SQ).
• the first two mobile clamps (PMl) and (PM2) work together for the execution of the first differentiated strip, whereas the mobile clamp (PM3) is caused to be integral to the pusher crossbeam (TS) for the entire cycle and, therefore, always remains aligned with the fixed clamps (PF).
• each mobile clamp (PMl), (PM2), (PM3) acts upon a single strip
• the fixed clamps (PF) act upon the fourth differentiated strip.
• the number of differentiated strips ((SI), (S2), (S3)) that can be cut at the same time depends on the number of mobile clamps ((PMl), (PM2), (PM3)) initially installed on the pusher (S).
• the solutions shown and described prove how the mobile clamp system suggested automatically adjusts not only to the length of the panels to be obtained, but also to their width.
• the mobile clamps (PM1), (PM2), (PM3) can be selectively grouped in single clamping and transporting groups that can vary as a function of the sizes of the panels to be obtained and/or of the cutting operations to be performed and, in particular, also as a function of the width of the strips (SI), (S2), (S3) and of the panels (P) to be cut.
• the single mobile clamps (PM1), (PM2), (PM3), as well as the fixed clamps (PF), in particular if they are provided with the upward and downward movement, can also be individually excluded from the working cycle, namely they can be excluded from the clamping and the positioning of the panels, as a function both of the working cycle to be performed itself and of the width of the panels (P) or of the strips (SI), (S2), (S3) to be cut.
• At least one of all the different clamps mounted on the pusher (S) can be caused to be laterally mobile along the pusher crossbeam (TS) according to the direction (X), so as to align or centre it with the panels (P) or with the strips (SI), (S2), (S3) to be cut.
• This system indeed, needs a single control system, a single drive, and a single reading and positioning system applied to the pusher, and is able to permit the simultaneous cutting of differentiated cutting patterns with two or more groups of differentiated strips as a function of the number of mobile damps mounted on the pusher crossbeam.
• the easiness with which the mobile clamps are selectively adjusted and grouped based on the different cutting patterns, namely based on the width of the single strips contained therein, makes the cutting machine according to the present invention extremely flexible and highly productive with remarkably reduced costs.

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• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Wood Science & Technology (AREA)
• Forests & Forestry (AREA)
• Jigs For Machine Tools (AREA)
• Sawing (AREA)
• Processing Of Stones Or Stones Resemblance Materials (AREA)

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• 2013
  • 2013-01-02 IT IT000003A patent/ITBO20130003A1/it unknown
  • 2013-12-24 WO PCT/IT2013/000366 patent/WO2014106868A1/en active Application Filing
  • 2013-12-24 EP EP13844546.5A patent/EP2941335A1/en not_active Withdrawn

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