EP2974840B1 - Rotary tool with adjustable thickness - Google Patents
Rotary tool with adjustable thickness Download PDFInfo
- Publication number
- EP2974840B1 EP2974840B1 EP15425047.6A EP15425047A EP2974840B1 EP 2974840 B1 EP2974840 B1 EP 2974840B1 EP 15425047 A EP15425047 A EP 15425047A EP 2974840 B1 EP2974840 B1 EP 2974840B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- cutters
- pins
- rotary tool
- adjustment
- 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.)
- Not-in-force
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G13/00—Cutter blocks; Other rotary cutting tools
- B27G13/005—Tools composed of two or more rotating discs
- B27G13/007—Tools composed of two or more rotating discs which are adjustable relatively to each other
Definitions
- the present invention relates to a rotary tool with adjustable thickness which can be used in machines for operating generic composite materials as per the preamble of claim 1.
- a rotary tool with adjustable thickness which can be used in machines for operating generic composite materials as per the preamble of claim 1.
- Such a device is disclosed by US 4 730 962 A .
- the invention concerns a rotary tool with high performance, which executes planing and squaring of panels or strips of wood and the like, comprising two coaxial cutters which are mounted on cutters holders and whose distance is simply and quickly adjustable by discrete steps.
- the common rotary tools with side cutters which are used in machines for working wood and generic composite materials normally provide the use of two cutters, which are mounted on respective shafts and which are set in rotation towards a specific direction by means of a suitable spindle connected to kinematic organs which drive the spindle to rotate, while the object being machined can be stably fixed to a reference slab or moved with respect to the cutters.
- the cutters which are provided with respective cutting edges, are placed on two separate disc-shaped bodies which are coaxial and facing each other and which are interconnected by suitable spacers, for allowing the mutual approaching and the mutual spacing to adjust the width of the tool.
- This adjustment is necessary as a result of the wearing of the cutting edges of said cutters and/or in order to change the thickness of the processing and said adjustment is specifically carried out by removing the central shaft and the relative cutters and by inserting or removing one or more of the aforesaid spacers.
- the present invention aims therefore to obviate the drawbacks of the prior art mentioned above and, in particular, the main object of the invention is to provide a rotary tool with adjustable thickness, which allows to safely and quickly adjust the distance between a cutter and the other, without having to use spacers between the above mentioned cutters, nor having to provide for the intervention of specialized personnel.
- Another object of the invention is to provide a rotary tool with adjustable thickness, which allows to perform workings (internal or external) on panels or strips of generic composite material having different geometries and/or dimensions.
- Another object of the present invention is to provide a rotary tool with adjustable thickness, which allows to obtain an indexed and accurate adjustment of the cutters, without dismantling the tool from the hubs, avoiding the use of spacers and thus increasing the flexibility of the machine, with respect to the prior art.
- a further object of the invention is to provide a rotary tool with adjustable thickness, which is particularly effective, reliable, convenient and economical, with respect to the prior art, and which can be used for any new or existing machine, for internal and/or external machining and for squaring panels made of wood or generic composite material.
- the rotary tool according to the present invention allows an indexed adjustment of the cutters, which are mounted on respective cutters holders, by sending pulses of compressed air.
- the whole is driven by a double rack and by special pins, which, by rotating within the slide (constituted by the profile of the double rack) each time it is given a pulse of compressed air, allow an accurate adjustment of the distance between the cutters.
- the rotary tool with adjustable thickness is mainly used, as said, in machines for squaring panels made of wood or generic composite material for carrying out internal and/or external workings and comprises two cutters holders 1, 2, on which two respective cutters are mounted (not shown in the appended drawings).
- the cutters holders 1, 2 are arranged coaxially, are rotated simultaneously between them and are also supported by a known hydraulic expansion hub 4, on which the spindle of the drive motor of the tool is engaged by means of the tightening screw 10 ( fig. 1 and 10A-10C ).
- a double rack is provided inside the cutters holders 1, 2 and said rack is formed by a first single profile 5, which is shaped as a saw-tooth and which is coupled with an upper portion 3 of the tool, and by a pair of conjugate profiles 6, 61, which are coupled with a lower portion 11 of the tool, so that the lower cutter holder 2 is integral with the rack provided with the conjugate profiles 6, 61 and the upper cutter holder 1 is integral with the rack provided with the single profile 5.
- Respective pins 7 engage within the profiles 5, 6, 61 and said pins 7 rotate according to discrete steps, and, as described more in detail below, by a distance equal to the pitch P of the conjugate profiles 6, 61 of the rack.
- the profiles 5, 6, 61 of the double rack can be varied at will, both in geometry and in the distance and/or pitch P, according to the user's requirements.
- the pins 7 are fixed and integral with a central ring 12, which is also fixed, which maintains the center-line and which allows the regulation of the tool with respect to a plane passing centrally to the tool; in turn, the central ring 12 is fixed to the pins 8 connecting it to the hydraulic expansion hub 4.
- a series of pulses of compressed air are used for moving the pins 7, so as to perform an indexed and accurate adjustment of the distance between the hubs 1, 2 and, therefore, of the thickness between the cutters of the tool.
- Figures 6, 7 and 8 show the rotary tool, according to the present invention, in a position according to which the distance between the cutters holders 1, 2, is, respectively, maximum, minimum and intermediate.
- Said opening conditions between the cutters are achieved through the movement of the adjustment pins 7, which perform a predetermined path determined by the geometry of the grooves of the profiles 5, 6, 61 of the double rack and, in particular, the path followed by the adjustment pins 7, between the positions of maximum and minimum opening between the cutters holders 1, 2 and therefore between the cutters, is the one indicated by the solid line L of fig. 11 .
- each pin 7 by sending a pulse of compressed air inside the chamber 13, which is delimited by the upper portion 3 of the tool and by the upper surface of the ring 12 (shown in detail in the appended fig. 9 ), it is possible to overcome the force of the contrast springs 9, positioned between the cutters holders 1, 2 and configured to slide inside the pins 81, so as to position the pin 7 in the highest point of the profile 6 of the rack coupled with the lower portion 11 of the tool, once the pressure is released (first point of adjustment, with the tool completely open, fig. 6 ).
- the lower portion 11 of the tool is provided for being positioned on the pins 7 and, consequently, for regulating the distance between the cutters holders 1, 2, while the upper portion 3 of the tool is provided for being moved on the pins 7 and for regulating the distance between the cutters holders 1, 2.
- figures 10A, 10B, 10C show the tool according to the present invention with the cutters holders 1, 2 in a position which is, respectively, completely open, intermediate and completely closed.
- the above mentioned mechanism allows the adjustment of the distance between the cutters without disassembling the above-mentioned cutters from their respective cutters holders 1, 2 and also avoiding the use of spacers between said cutters holders 1, 2, so as to obtain a clear increase of flexibility of the machine on which is mounted the tool; it is also maintained the center line of the tool, so that the adjustment can always take place with respect to a central reference with respect to the cutters, through the use of the ring 12.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Details Of Cutting Devices (AREA)
Description
- The present invention relates to a rotary tool with adjustable thickness which can be used in machines for operating generic composite materials as per the preamble of
claim 1. Such a device is disclosed byUS 4 730 962 A . More particularly, the invention concerns a rotary tool with high performance, which executes planing and squaring of panels or strips of wood and the like, comprising two coaxial cutters which are mounted on cutters holders and whose distance is simply and quickly adjustable by discrete steps. - The common rotary tools with side cutters which are used in machines for working wood and generic composite materials normally provide the use of two cutters, which are mounted on respective shafts and which are set in rotation towards a specific direction by means of a suitable spindle connected to kinematic organs which drive the spindle to rotate, while the object being machined can be stably fixed to a reference slab or moved with respect to the cutters.
- In particular, the cutters, which are provided with respective cutting edges, are placed on two separate disc-shaped bodies which are coaxial and facing each other and which are interconnected by suitable spacers, for allowing the mutual approaching and the mutual spacing to adjust the width of the tool.
- This adjustment is necessary as a result of the wearing of the cutting edges of said cutters and/or in order to change the thickness of the processing and said adjustment is specifically carried out by removing the central shaft and the relative cutters and by inserting or removing one or more of the aforesaid spacers.
- It follows an undoubted inconvenience and slowness of such operations, to which is added the drawback related to the fact that it is not possible to ensure a sufficient accuracy of handling and positioning of the two mobile bodies associated with the cutters.
- The present invention aims therefore to obviate the drawbacks of the prior art mentioned above and, in particular, the main object of the invention is to provide a rotary tool with adjustable thickness, which allows to safely and quickly adjust the distance between a cutter and the other, without having to use spacers between the above mentioned cutters, nor having to provide for the intervention of specialized personnel.
- Another object of the invention is to provide a rotary tool with adjustable thickness, which allows to perform workings (internal or external) on panels or strips of generic composite material having different geometries and/or dimensions.
- Another object of the present invention is to provide a rotary tool with adjustable thickness, which allows to obtain an indexed and accurate adjustment of the cutters, without dismantling the tool from the hubs, avoiding the use of spacers and thus increasing the flexibility of the machine, with respect to the prior art.
- A further object of the invention is to provide a rotary tool with adjustable thickness, which is particularly effective, reliable, convenient and economical, with respect to the prior art, and which can be used for any new or existing machine, for internal and/or external machining and for squaring panels made of wood or generic composite material.
- These and other objects are achieved by a rotating tool with adjustable thickness according to
claim 1. - Further technical features of the rotary tool with adjustable thickness, which is the object of the invention, are given in the further dependent claims.
- Advantageously, the rotary tool according to the present invention allows an indexed adjustment of the cutters, which are mounted on respective cutters holders, by sending pulses of compressed air.
- The whole is driven by a double rack and by special pins, which, by rotating within the slide (constituted by the profile of the double rack) each time it is given a pulse of compressed air, allow an accurate adjustment of the distance between the cutters.
- Further purposes and advantages of this invention will become more clear from the following description relating to a preferred embodiment of the rotary tool with adjustable thickness, according to the present invention, and to the appended drawings, given as a preferred embodiment, in which:
-
figure 1 is a perspective view of the rotary tool with adjustable thickness, according to the present invention; -
figures 2 and 3 show exploded views of some components of the rotary tool with adjustable thickness offigure 1 , according to the present invention; -
figure 4 is a front partially sectioned view of the rotary tool with adjustable thickness offigure 1 , according to the present invention; -
figure 5 is a bottom perspective and partially sectioned view of the rotary tool with adjustable thickness offigure 1 , according to the present invention; -
figures 6, 7 and8 show a series of front views of the rotary tool offigure 1 , free of the hub and placed in different adjustment positions, according to the present invention; -
figure 9 is a partial cross section view of the rotary tool offigure 1 , according to the present invention; -
figures 10A, 10B and 10C show a series of front views of the rotary tool offigure 1 , placed in different adjustment positions, according to the present invention; -
figure 11 is a schematic view of the path followed by the adjustment pins during the adjustment of the rotary tool offigure 1 , according to the present invention. - With reference to the mentioned figures, the rotary tool with adjustable thickness, according to the invention, is mainly used, as said, in machines for squaring panels made of wood or generic composite material for carrying out internal and/or external workings and comprises two
cutters holders - The
cutters holders hydraulic expansion hub 4, on which the spindle of the drive motor of the tool is engaged by means of the tightening screw 10 (fig. 1 and10A-10C ). - According to the present invention, a double rack is provided inside the
cutters holders single profile 5, which is shaped as a saw-tooth and which is coupled with anupper portion 3 of the tool, and by a pair ofconjugate profiles lower portion 11 of the tool, so that thelower cutter holder 2 is integral with the rack provided with theconjugate profiles upper cutter holder 1 is integral with the rack provided with thesingle profile 5.Respective pins 7 engage within theprofiles pins 7 rotate according to discrete steps, and, as described more in detail below, by a distance equal to the pitch P of theconjugate profiles - It should be noted, in any case, that the
profiles - The
pins 7 are fixed and integral with acentral ring 12, which is also fixed, which maintains the center-line and which allows the regulation of the tool with respect to a plane passing centrally to the tool; in turn, thecentral ring 12 is fixed to thepins 8 connecting it to thehydraulic expansion hub 4. - In particular, a series of pulses of compressed air are used for moving the
pins 7, so as to perform an indexed and accurate adjustment of the distance between thehubs -
Figures 6, 7 and8 show the rotary tool, according to the present invention, in a position according to which the distance between thecutters holders - Said opening conditions between the cutters are achieved through the movement of the
adjustment pins 7, which perform a predetermined path determined by the geometry of the grooves of theprofiles adjustment pins 7, between the positions of maximum and minimum opening between thecutters holders fig. 11 . - Specifically, starting from the lowest position of each
pin 7, by sending a pulse of compressed air inside thechamber 13, which is delimited by theupper portion 3 of the tool and by the upper surface of the ring 12 (shown in detail in the appendedfig. 9 ), it is possible to overcome the force of thecontrast springs 9, positioned between thecutters holders pins 81, so as to position thepin 7 in the highest point of theprofile 6 of the rack coupled with thelower portion 11 of the tool, once the pressure is released (first point of adjustment, with the tool completely open,fig. 6 ). - Practically, the
lower portion 11 of the tool is provided for being positioned on thepins 7 and, consequently, for regulating the distance between thecutters holders upper portion 3 of the tool is provided for being moved on thepins 7 and for regulating the distance between thecutters holders - When other pulses of compressed air are delivered within the
pressure chamber 13, it is possible to obtain a step adjustment of the thickness between thecutters holders 1, 2 (and, therefore, between the cutters of the rotating tool), until the lowest position shown in the appendedfig. 7 (last point of adjustment, with the tool completely closed), after which eachpin 7 has followed the whole path identified by the line L offig. 11 . Therefore, when the lowest point is reached, the adjustment can start again thanks to the geometry of theconjugate profiles - In this regard,
figures 10A, 10B, 10C show the tool according to the present invention with thecutters holders - It follows that the user is able to widen or narrow the distance between the cutters from a minimum opening value to a maximum opening value, simply by stopping the machine and by pressurizing the
chamber 13; said opening values are determined by the geometry of theprofiles - Thus, there is a discrete adjustment of the distance between the cutters and, consequently, a discrete variation of the cutting profile, simply by sending compressed air from the outside and by controlling the flow of said compressed air within the
annular chamber 13. - In particular, the above mentioned mechanism allows the adjustment of the distance between the cutters without disassembling the above-mentioned cutters from their
respective cutters holders cutters holders ring 12. - The technical features of the rotary tool with adjustable thickness, which is the object of the present invention, are clear from the above description, as well as the advantages are also clear.
- Finally, it is also clear that other variations may be made to the rotary tool of the invention, without departing from the scope of the appended claims, as well as it is also clear that in the practical implementation of the invention, materials, shapes and dimensions of the features illustrated may be any according to requirements, but within the scope of the claims.
Claims (8)
- Rotary tool with adjustable thickness, which is configured to be used in squaring machines for panels made of composite material, comprising cutters holders (1, 2), connected with a hydraulic-expansion hub (4), which are coaxially arranged and which are rotated together at the same time, characterized in that a double rack is placed between said cutters holders (1, 2), said rack having a single shaped profile (5), associated with a first portion (3) of said tool connected to a first cutter holder (1), and two conjugate profiles (6, 61), associated with a second portion (11) of said tool connected to a second cutter holder (2), respective adjustment pins (7) being coupled with said rack and moving along said profiles (5, 6, 61) at steps thanks to the pressure of at least one annular chamber (13) defined by said first portion (3) of the tool and next to said profiles (5, 6, 61), so as to make an adjustment at steps of the distance between said cutters holders (1, 2).
- Rotary tool as claimed in claim 1, characterized in that said adjustment pins (7) perform a predetermined path between a plurality of recesses provided on said profiles (5, 6, 61) of said rack, said recesses being located at a fixed distance (P) between them.
- Rotary tool as claimed in at least one of the preceding claims, characterized in that a plurality of pulses of compressed air are sent to said annular chamber (13), in order to counteract the elastic force of springs (9) and to place said adjustment pins (7) within prefixed recesses of said rack, said pins (7) thus assuming a plurality of operating positions, according to which said tool is completely open and said cutters holders (1, 2) are placed at a maximum distance between them and according to which said tool is completely closed and said cutters holders (1, 2) are placed at a minimum distance between them, and a plurality of intermediate operating positions, a step adjustment of the distance between said cutters holders (1, 2) is provided.
- Rotary tool as claimed in at least one of the preceding claims, characterized in that said adjustment pins (7) rotate inside the profiles (5, 6, 61) of the rack.
- Rotary tool as claimed in at least one of the preceding claims, characterized in that said profiles (5, 6, 61) of the rack (5, 6) have different shape.
- Rotary tool as claimed in at least one of the preceding claims, characterized in that said adjustment pins (7) are fixed and integral with a fixed central ring (12), which maintains the center line and that allows adjustment of the tool with respect to a plane passing centrally to said tool.
- Rotary tool as claimed in claim 6, characterized in that said central ring (12) is fixed to connecting pins (8) which connect the ring (12) to said hydraulic expansion hub (4).
- Rotary tool as claimed in at least one of the preceding claims, characterized in that said second portion (11) of the tool causes the positioning of the tool with respect to said pins (7), while said first portion (3) of the tool causes the movement of the tool with respect to said pins (7).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL15425047T PL2974840T3 (en) | 2014-07-17 | 2015-06-24 | Rotary tool with adjustable thickness |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITVI20140189 | 2014-07-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2974840A1 EP2974840A1 (en) | 2016-01-20 |
EP2974840B1 true EP2974840B1 (en) | 2017-05-17 |
Family
ID=51663394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15425047.6A Not-in-force EP2974840B1 (en) | 2014-07-17 | 2015-06-24 | Rotary tool with adjustable thickness |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2974840B1 (en) |
DK (1) | DK2974840T3 (en) |
ES (1) | ES2635373T3 (en) |
PL (1) | PL2974840T3 (en) |
PT (1) | PT2974840T (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202017007103U1 (en) | 2017-02-14 | 2019-07-15 | Leitz Gmbh & Co. Kg | Tool for machining workpieces |
DE102017123681C5 (en) * | 2017-10-11 | 2022-01-27 | Leitz Gmbh & Co. Kg | Milling tool for processing wood, wood-based materials, plastics or light metals |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE446319B (en) * | 1982-01-07 | 1986-09-01 | Lennart Johannesson | DEVICE FOR SHARED PARTS |
US4547997A (en) * | 1984-05-11 | 1985-10-22 | Cincinnati Milacron Inc. | Adjustable tool mount |
-
2015
- 2015-06-24 EP EP15425047.6A patent/EP2974840B1/en not_active Not-in-force
- 2015-06-24 PL PL15425047T patent/PL2974840T3/en unknown
- 2015-06-24 PT PT154250476T patent/PT2974840T/en unknown
- 2015-06-24 DK DK15425047.6T patent/DK2974840T3/en active
- 2015-06-24 ES ES15425047.6T patent/ES2635373T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
DK2974840T3 (en) | 2017-08-28 |
PL2974840T3 (en) | 2017-10-31 |
PT2974840T (en) | 2017-08-08 |
EP2974840A1 (en) | 2016-01-20 |
ES2635373T3 (en) | 2017-10-03 |
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