EP2934838A1 - Machine tool - Google Patents

Machine tool

Info

Publication number
EP2934838A1
EP2934838A1 EP13830232.8A EP13830232A EP2934838A1 EP 2934838 A1 EP2934838 A1 EP 2934838A1 EP 13830232 A EP13830232 A EP 13830232A EP 2934838 A1 EP2934838 A1 EP 2934838A1
Authority
EP
European Patent Office
Prior art keywords
tool
machine tool
supporting surface
tool according
base
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.)
Granted
Application number
EP13830232.8A
Other languages
German (de)
French (fr)
Other versions
EP2934838B1 (en
Inventor
Antonio Bertini
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.)
Imer International SpA
Original Assignee
Imer International SpA
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 Imer International SpA filed Critical Imer International SpA
Publication of EP2934838A1 publication Critical patent/EP2934838A1/en
Application granted granted Critical
Publication of EP2934838B1 publication Critical patent/EP2934838B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
    • B28D7/02—Accessories specially adapted for use with machines or devices of the preceding groups for removing or laying dust, e.g. by spraying liquids; for cooling work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
    • B28D7/04—Accessories specially adapted for use with machines or devices of the preceding groups for supporting or holding work or conveying or discharging work

Definitions

  • the present invention relates to a machine tool for the building industry, in particular for the processing of materials or "pieces" used in construction sites as wall and floor tiles or slabs of stone materials.
  • FR1006588 discloses a machine tool for drilling stone blocks in which a tool performs the drilling by acting from below with respect to the blocks, so as to allow the evacuation of debris by gravity.
  • This machine comprises at least one rotary tool consisting of a hollow vertical cylinder that is open on its upper end, on which a cutting edge is formed.
  • the side walls of said hollow cylinder are perforated. The debris falling into the hollow cylinder by gravity and escape through the holes of the side walls.
  • the said hollow cylinders are driven by an electric motor located below a piece-holder surface. The latter has a single slot to allow the passage of the hollow cylinders that are also placed below the piece-holder surface.
  • Such a machine is not usable to perform processing that require the cooling of the tools, either because the motor is installed below the hollow cylinders and the piece- holder surface, for which reason the electric motor would be invested by the cooling fluid coming from above, and because the debris would form a slurry within the hollow cylinders which, by obstructing the holes of the side walls, would compromise the operation of the same hollow cylinders.
  • the machine described in FR1006588 allows only one mode of evacuation of debris, that is, through the hollow cylinders. The evacuation of the debris through the slot formed in the piece-holder surface is not possible because the debris are collected directly in the hollow cylinders that are specially shaped to collect debris and prevent the same from falling onto the piece-holder surface.
  • the main purpose of the present invention is to obviate the aforesaid drawbacks and to provide a machine which, at the same time, facilitates the operations of the type mentioned above.
  • machining operations such as linear and curved cuts, bevelling or drilling of ceramic materials also of reduced thickness.
  • a machine according to the present invention is relatively simple, economical and usable even by not particularly skilled personnel.
  • Fig.l is a schematic vertical sectional view of a machine according to the present invention.
  • Fig.2 is a plan view of the machine shown in
  • a machine in accordance with the present invention comprises a rotary tool (1) consisting of a diamond bur grafted on a spindle driven by an high speed electric motor (2).
  • the motor (2) is housed, in a fixed and predetermined position, in a watertight chamber (3) formed within a retention base (4) which, at the top, has a perforated surface (40) from which protrudes perpendicularly the rotary tool (1) and on which the workpiece is placed.
  • the holes (41) of the surface (40) serve to allow to collect the liquid used to cool and lubricate the tool inside the same base (4) .
  • the base (4) has, in proximity of the tool (1), a nozzle fed by a pump immersed in the same base (4) for cooling and lubrication of the tool using the liquid that collects in it.
  • Said retention base (4) is box-shaped. Therefore it exhibits, in addition to said upper perforated surface (40), a bottom (42) and side walls (43) joining the upper surface (40) with the bottom (42).
  • the motor (2) can be of the type available on the market .
  • the tool has helical grooves to facilitate its cooling (the shape of the grooves imparts to the coolant a motion along the tool axis) and to avoid that it forms a slurry with the debris produced during machining.
  • the said chamber (3) isolates the motor (2) from the liquid that collects in the base (4) falling through the holes (41) of the surface (40) .
  • the base (4) is provided with two cover surfaces (5) each of which is hinged on one side of said surface (40).
  • the surfaces (5) are open, that is deployed, allowing to widen the support surface for the workpieces.
  • the surfaces (5) can be closed, that is, rotated about the respective hinge axes (y) , so as to cover the surface (4) and protect it.
  • the said axes (y) are parallel to each other and are horizontal and lateral with respect to the surface (40) .
  • the machining is performed manually by moving the workpiece relative to the tool, keeping it resting on the work surface ( 4 ) .
  • a piece-holder slide (not shown in the drawings) can be installed on the working surface (4) .
  • This slide will have a stop orthogonal to the direction of cutting to assist the thrust on the workpiece and a stop parallel to the direction of cutting suitably arranged in such a way as to compensate for the thrust exerted by the tool.
  • the tool since the tool has a rotary motion, it will transmit to the workpiece a force that will always act in the same direction once established the cutting direction and the direction of rotation of the tool.
  • the stop parallel to the cutting direction will be juxtaposed to compensate this force and to establish the position of the cut.
  • the tool (1) can be tilted, for example with an angle of 45° with respect to the working surface (4) .
  • This can be achieved, for example, by installing the motor (2) with a corresponding inclination inside the chamber (3) or by using an angular mandrel for the tool. This inclination will allow the operator to make angled cuts and will facilitate the release of the workpiece without causing damage to the same.
  • the tool (1) is rotated with a speed exceeding 20,000 rpm so as to ensure a sufficient cutting speed even when using small diameter tools (eg. 6 mm) that are preferable because they induce less stress in the workpiece under machining and can be used to perform more accurate working and to reduce the area affected by the removal of material.
  • small diameter tools eg. 6 mm
  • the texture of the abrasive coating is also designed to induce lower vibrations as possible to the workpiece .
  • the processing performed by using a machine according to the present invention provide, in practice, a relative movement between a slab of stone material or other sheet-like building product such as tiles, and a tool made to rotate at high rpm, in which the said movement on takes place on a straight and/or curvilinear path.
  • the tool in the example described above
  • the tool is a helical bur to facilitate unloading of the removed material and improve the cooling, and during machining the product is placed on a support surface.
  • the tool (1) is a helical bur.
  • the tool (1) can be of any suitable type and may be changed depending on the thickness and type of material to be worked, the type of processing to be performed (for example, linear or curved cutting, chamfering, cutting at 45 ° etc.).
  • the cutting characteristics of the tool may vary (eg, in terms of nature, hardness and texture of the abrasive coating, or shape, diameter and length of the cutting edge of the tool) .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

Machine tool, in particular for the processing of materials or pieces used in the building industry such as tiles or slabs of stone materials, comprising a rotary tool (1) grafted on a spindle driven by a high speed electric motor (2). The said motor (2) is housed, in a predetermined position, in a watertight chamber (3) formed within a containing base (4) which, at its top, has a perforated surface (40) from which protrudes the tool (1) and on which is supported the material or piece to be processed.

Description

TITLE
Machine tool.
DESCRIPTION
The present invention relates to a machine tool for the building industry, in particular for the processing of materials or "pieces" used in construction sites as wall and floor tiles or slabs of stone materials.
It is known that at the construction sites often occurs the need to perform extemporaneous machining of products, such as tiles or briquettes, for shaping them according to patterns that can vary each time and are not known by the manufacturer because they depend, for example, on specific conformations of hydraulic systems or special positioning of toilets or sinks. The required machining may consist, for example, in the chamfering of the pieces or in the formation of straight or curved notches.
FR1006588 discloses a machine tool for drilling stone blocks in which a tool performs the drilling by acting from below with respect to the blocks, so as to allow the evacuation of debris by gravity. This machine comprises at least one rotary tool consisting of a hollow vertical cylinder that is open on its upper end, on which a cutting edge is formed. The side walls of said hollow cylinder are perforated. The debris falling into the hollow cylinder by gravity and escape through the holes of the side walls. The said hollow cylinders are driven by an electric motor located below a piece-holder surface. The latter has a single slot to allow the passage of the hollow cylinders that are also placed below the piece-holder surface. Such a machine is not usable to perform processing that require the cooling of the tools, either because the motor is installed below the hollow cylinders and the piece- holder surface, for which reason the electric motor would be invested by the cooling fluid coming from above, and because the debris would form a slurry within the hollow cylinders which, by obstructing the holes of the side walls, would compromise the operation of the same hollow cylinders. The machine described in FR1006588 allows only one mode of evacuation of debris, that is, through the hollow cylinders. The evacuation of the debris through the slot formed in the piece-holder surface is not possible because the debris are collected directly in the hollow cylinders that are specially shaped to collect debris and prevent the same from falling onto the piece-holder surface.
The main purpose of the present invention is to obviate the aforesaid drawbacks and to provide a machine which, at the same time, facilitates the operations of the type mentioned above.
This result is achieved, according to the present invention, by adopting the idea of making a machine having the characteristics indicated in claim 1. Other features of the present invention are the subject of the dependent claims.
Thanks to the present invention, it is possible to easily perform machining operations such as linear and curved cuts, bevelling or drilling of ceramic materials also of reduced thickness. Moreover, a machine according to the present invention is relatively simple, economical and usable even by not particularly skilled personnel.
These and other advantages and features of the present invention will be best understood by anyone skilled in the art thanks to the following description and the accompanying drawings, given by way of example but not to be considered in a limiting sense, in which:
Fig.l is a schematic vertical sectional view of a machine according to the present invention;
Fig.2 is a plan view of the machine shown in
Fig.1.
Reduced to its essential structure and with reference to Figures 1 and 2 of the attached drawings, a machine in accordance with the present invention comprises a rotary tool (1) consisting of a diamond bur grafted on a spindle driven by an high speed electric motor (2). The motor (2) is housed, in a fixed and predetermined position, in a watertight chamber (3) formed within a retention base (4) which, at the top, has a perforated surface (40) from which protrudes perpendicularly the rotary tool (1) and on which the workpiece is placed. The holes (41) of the surface (40) serve to allow to collect the liquid used to cool and lubricate the tool inside the same base (4) . Furthermore, the base (4) has, in proximity of the tool (1), a nozzle fed by a pump immersed in the same base (4) for cooling and lubrication of the tool using the liquid that collects in it.
In Fig.l, the said pump is schematically indicated by the block "P", while the said nozzle is indicated by the reference "N". For simplification, the connection between the pump (P) and the nozzle (N) is not represented in the drawings.
Said retention base (4) is box-shaped. Therefore it exhibits, in addition to said upper perforated surface (40), a bottom (42) and side walls (43) joining the upper surface (40) with the bottom (42). The motor (2) can be of the type available on the market .
The tool has helical grooves to facilitate its cooling (the shape of the grooves imparts to the coolant a motion along the tool axis) and to avoid that it forms a slurry with the debris produced during machining.
The said chamber (3) isolates the motor (2) from the liquid that collects in the base (4) falling through the holes (41) of the surface (40) .
The base (4) is provided with two cover surfaces (5) each of which is hinged on one side of said surface (40). In Fig.2 the surfaces (5) are open, that is deployed, allowing to widen the support surface for the workpieces.
When the machine is not used, the surfaces (5) can be closed, that is, rotated about the respective hinge axes (y) , so as to cover the surface (4) and protect it. The said axes (y) are parallel to each other and are horizontal and lateral with respect to the surface (40) .
Since the tool is in a fixed position, the machining is performed manually by moving the workpiece relative to the tool, keeping it resting on the work surface ( 4 ) .
To facilitate, in particular, the execution of linear cuts, a piece-holder slide (not shown in the drawings) can be installed on the working surface (4) . This slide will have a stop orthogonal to the direction of cutting to assist the thrust on the workpiece and a stop parallel to the direction of cutting suitably arranged in such a way as to compensate for the thrust exerted by the tool. Actually, since the tool has a rotary motion, it will transmit to the workpiece a force that will always act in the same direction once established the cutting direction and the direction of rotation of the tool. The stop parallel to the cutting direction will be juxtaposed to compensate this force and to establish the position of the cut.
Furthermore, the tool (1) can be tilted, for example with an angle of 45° with respect to the working surface (4) . This can be achieved, for example, by installing the motor (2) with a corresponding inclination inside the chamber (3) or by using an angular mandrel for the tool. This inclination will allow the operator to make angled cuts and will facilitate the release of the workpiece without causing damage to the same.
For example, the tool (1) is rotated with a speed exceeding 20,000 rpm so as to ensure a sufficient cutting speed even when using small diameter tools (eg. 6 mm) that are preferable because they induce less stress in the workpiece under machining and can be used to perform more accurate working and to reduce the area affected by the removal of material. The texture of the abrasive coating is also designed to induce lower vibrations as possible to the workpiece .
The processing performed by using a machine according to the present invention provide, in practice, a relative movement between a slab of stone material or other sheet-like building product such as tiles, and a tool made to rotate at high rpm, in which the said movement on takes place on a straight and/or curvilinear path. The tool (in the example described above) is a helical bur to facilitate unloading of the removed material and improve the cooling, and during machining the product is placed on a support surface.
The foregoing description is related to the case in which the tool (1) is a helical bur. However, the tool (1) can be of any suitable type and may be changed depending on the thickness and type of material to be worked, the type of processing to be performed (for example, linear or curved cutting, chamfering, cutting at 45 ° etc.). Similarly, the cutting characteristics of the tool may vary (eg, in terms of nature, hardness and texture of the abrasive coating, or shape, diameter and length of the cutting edge of the tool) .
The possibility of using more types of tools, in addition to simplifying the type of machining, allows to reduce the costs associated with machining optimizing the use of the tool.
In practice the details of execution may vary in any equivalent way as for what concerns the shape, size and arrangement of the individual elements described and illustrated, without thereby departing from the scope of the adopted solution and thus remaining within the limits of protection granted by this patent .

Claims

1) Machine tool, in particular for the processing of materials or pieces used in the building industry such as tiles or slabs of stone materials, comprising a rotary tool (1) grafted on a spindle driven by a high speed electric motor (2), characterized in that the said motor (2) is housed, in a predetermined position, in a watertight chamber (3) formed within a containing base (4) which, at its top, has a perforated surface (40) from which protrudes the tool (1) and on which is supported the material or piece to be processed .
2) A machine tool according to claim 1 characterized in that the said base (4) has, in correspondence of the tool (1), a nozzle (N) fed by a pump (P) immersed in the same base (4), for cooling and lubrication of the tool by using the liquid which collects in it through the holes (41) of the supporting surface (40) .
3) A machine tool according to claim 1 characterized in that on said base (4) are mounted two cover surfaces (5) each of which is hinged on one side of said supporting surface (40) .
4) A machine tool according to claim 1 characterized in that on said supporting surface (40) is mounted a piece-holding carriage.
5) A machine tool according to claim 1 characterized in that the axis of said tool (1) protrudes orthogonally from said supporting surface (40) .
6) A machine tool according to claim 1 characterized in that the axis of said tool (1) protrudes from said supporting surface (40) forming with the latter an angle different from 90 ° . 7) A machine tool according to claim 1 characterized in that the said tool (1) is constituted by a helix bur.
EP13830232.8A 2012-12-21 2013-12-19 Machine tool Not-in-force EP2934838B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000291A ITFI20120291A1 (en) 2012-12-21 2012-12-21 CONTINUOUS MIXER FOR BUILDING
PCT/IT2013/000355 WO2014097341A1 (en) 2012-12-21 2013-12-19 Machine tool

Publications (2)

Publication Number Publication Date
EP2934838A1 true EP2934838A1 (en) 2015-10-28
EP2934838B1 EP2934838B1 (en) 2018-07-04

Family

ID=47631605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13830232.8A Not-in-force EP2934838B1 (en) 2012-12-21 2013-12-19 Machine tool

Country Status (3)

Country Link
EP (1) EP2934838B1 (en)
IT (1) ITFI20120291A1 (en)
WO (1) WO2014097341A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10265883B2 (en) 2014-01-31 2019-04-23 Imer International S.P.A. Machine tool

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1006588A (en) * 1948-02-05 1952-04-24 Method and device for drilling stone blocks, or the like
US3555127A (en) * 1968-02-23 1971-01-12 Armstrong Cork Co Method of cutting tile in register from a continuous sheet
CN102019647A (en) * 2009-09-17 2011-04-20 鑫茂机械工业股份有限公司 Worktable for circular sawing machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014097341A1 *

Also Published As

Publication number Publication date
WO2014097341A1 (en) 2014-06-26
ITFI20120291A1 (en) 2014-06-22
EP2934838B1 (en) 2018-07-04

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