Machine for cutting stone blocks or the like

专利摘要:
The machine comprises a bearing structure (103), a first guide drum (109) for guiding at least one cutting wire (F) and a second guide drum (111) for the cutting wire. The first guide drum and the second guide drum are movable along the bearing structure and define an active branch of the cutting wire (F) for cutting stone blocks (B) or the like. The first guide drum is motorized. The machine further comprises at least one tension pulley (117, 119) for each cutting wire (F). Each tension pulley is provided with tensioning members for tensioning the respective cutting wire driven around the tension pulley. Each cutting wire (F) forms a single span between the respective tension pulley (117, 119) and the first guide drum (109). Moreover, each tension pulley is movable along a tensioning direction (D) not parallel to the active branch of the respective cutting wire (F).
公开号:ES2542537A2
申请号:ES201490115
申请日:2013-04-19
公开日:2015-08-06
发明作者:Franco ROBERTI；Francesco VEZZI；Riccardo GIANVANNI
申请人:GASPARI MENOTTI SpA；
IPC主号:

专利说明:

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P201490115
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Two sides, respectively 5A and 5B, can be distinguished in the frame 5. On the side 5A there is a motorized drum 9 provided with a plurality of guide grooves for the cutting threads F. A second lower guide drum 11 and a Third upper guide drum 13 are present on side 5B. Each of the guide drums 11 and 13 comprises a plurality of guide grooves for the threads F, so that each cutting thread F follows a closed path along which it is moved by the rotation of the motorized guide drum 9.
Normally, the motorized guide drum 9 is formed in one piece, while the guide drums 11, 13 consist of a plurality of coaxially mounted discs arranged adjacent to each other to form these drums.
Each cutting wire F is also guided around a respective tension pulley 17 or 19. More particularly, in the known machine illustrated in Figure 1, two series of tension pulleys 17, 19 are provided, which are staggered and alternated vertically, that is, a tension pulley 19 is partially inserted in a staggered manner between two tension pulleys coaxial 17. In this way, the cutting wires F are guided alternately: a cutting wire F is driven around the pulley 17 and the adjacent one is driven around the pulley 19, and so on. Tension pulleys 17, 19 are supported on a mobile beam 21 according to the double arrow f21, in a direction parallel to the direction of the active branches of the individual cutting threads F extending between the guide drum 9 and the guide drum 11. Each tension pulley 17, 19 is carried by a slide 23, which can be moved according to the double arrow f23, parallel to the movement, according to the double arrow f21, of the beam 21 that carries the sliders 23 of the tension pulleys 17, 19.
With this arrangement, all the cutting wires F can be tensioned by a movement of the mobile beam 21 guided in the frame 5 according to the arrow f21. In addition, each cutting thread F can be tensioned independently of the adjacent threads by movement, in accordance with arrow f23, of the respective slide 23 with respect to the moving beam 21, in order to optimize the tension of each thread of cut F.
Two support rollers 25, 27 are disposed along the active branch, that is, the basically rectilinear lower branch FA of each cutting wire F that extends between the guide drum 9 and the guide drum 11; these support rollers guide the cutting threads F near the area where, during the cutting, the latter will penetrate the stone block B, in order to decrease the upward bending of these threads F.
In order to cut the block B into a plurality of slabs N + 1, where N is the number of parallel cutting wires F driven around the drums 9, 11, 13 and the pulleys 17, 19, the frame 5 is gradually lowered accordingly with the double arrow f5 while the thread of
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traditional structures, as will be more apparent from the following description of some embodiments of the invention.
Advantageously, the tensioning direction forms an angle of less than 30 ° and preferably less than 20 ° with the bisector of the cutting angle of the cutting wire.
Therefore, each tension pulley can advantageously move along a direction basically parallel to that resulting from the forces applied thereon by the two branches of the cutting wire dragged around the tension pulley. The force applied to the pulley by each branch of the cutting line is oriented according to the direction of the respective branch of the cutting line.
In this way, the maximum variation of the tension of the cutting wire can be obtained with the minimum displacement of the tension pulley.
Advantageously, each tension pulley is carried by a slide controlled by a respective tension actuator, for example a cylinder-piston actuator, which acts on said slide. To optimize the available space, tension pulleys are preferably subdivided into two series of stepped tension pulleys. The tension actuators can be housed within a common beam, with which sliding guides for the slides carrying the tension pulleys are also integral. In other embodiments, the actuators can project at least partially from said beam. The beam can move and be provided with a pre-tensioning movement by means of the appropriate actuators. However, in accordance with the preferred embodiments, the beam is fixed with respect to the frame carrying the guide drums, and it is not necessary to pre-tension the cutting threads due to the particular shape of the cutting wire path, which allows a significant change in the tension of each cutting wire through limited movements of the respective tension pulleys.
To reduce the fatigue of the cutting wires, in advantageous embodiments, the free guide drum and tension pulleys have basically the same diameter.
According to a further aspect, the invention relates to a multi-wire machine for cutting stone blocks or the like, comprising: a support structure; a frame that can move along the support structure, preferably with a vertical movement; on a first side of the mobile frame, a guide drum for a plurality of cutting threads; on a second side of the mobile frame, a second guide drum for said plurality of cutting threads; said first guide drum and said second guide drum for each cutting wire defining an active branch for cutting stone blocks or the like, one of said first guide drum and said second guide drum being motorized; a plurality of tension pulleys, each of the
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with tensioning direction D.
Thanks to the machine geometry, the drag angle of each cutting line F around the respective tension pulley 117, 119 is significantly greater than the drag angle of the cutting threads F around the pulley 17, 19 in the machine of Figure 1. This allows the tension of each cutting wire F to be significantly changed even by very small displacements along the tensioning direction D.
More particularly, the converging branches of a respective cutting wire F driven around a corresponding pulley 117 or 119 define between them an angle, indicated with β in Figure 2, advantageously less than 120 °, preferably less than 90 ° and more preferably less of 80º or less. This angle formed by the converging branches of the single cutting wire F around the respective tension pulley is therefore limited in width, with the result that at short displacements of the tension pulley 117 or 119 in the direction D they have a significant change in the length of the cutting wire and, therefore, in the tension of the cutting wire.
In this way, it is possible to provide a single tensioning movement for each tension pulley 117, 119 obtained by a single actuator 135, 137 without the need to pre-tension all the cutting threads by moving the beam 129. In fact, in the embodiment illustrated in Figures 2 to 4, beam 129 is stationary with respect to frame 105 and can be integral therewith. This allows a much simpler machine structure.
Thanks to the smaller number of mechanical members to guide the cutting wires, the tension pulleys 117, 119 can have a basically larger diameter than in traditional systems. As shown in the diagram of Figure 2, for example, the diameter of the tension pulleys 117, 119 may be almost the same as that of the free guide drum 111. A larger diameter of the tension pulleys reduces the tension of shear of the cutting wire due to bending in the guide area.
If a longer tension stroke is required, that is, a longer displacement of the pulleys 117, 119 in the D direction, without excessive elongation of the guide bars 125, 131, it is possible to arrange the tensioning system for the cutting wires F, as illustrated in Figure 5. In this Figure, the beam 129 is not fixed with respect to the frame 105, and is provided with a pre-tensioning movement according to the double arrow f129. For example, the pre-tensioning movement can be obtained through a pair of cylinder and piston actuators 141 disposed at the ends of the beam 129 and fixed to said beam and to the frame 105. The frame 105 can have guides 143 for guide the movement of beam 129. This structure makes the machine less simple than that of Figure 3 but allows a longer stroke of the tension pulleys.
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权利要求:
Claims (1)
[1]
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同族专利:

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公开号 | 公开日

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ITFI20120078A1|2013-10-21|

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BR112014026145A2|2017-06-27|

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WO2013156606A1|2013-10-24|

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ES2542537R1|2015-09-16|

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ES2542537B1|2016-06-29|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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FR19463E|1912-06-21|1915-02-11|Armand Van Wylick|Spiral wire sawing device|

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US2803239A|1955-10-04|1957-08-20|D Avancourt Pierre De Vitry|Profile saw|

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DE3532717A1|1985-09-13|1987-03-26|Heckler & Koch Gmbh|Wire saw with tension device|

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US6171208B1|1999-01-27|2001-01-09|Pellegrini Meccanica S.P.A.|Device for tensioning flexible elements wound onto pulleys|

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US8360047B2|2007-09-28|2013-01-29|Luigi Pedrini|Cutting machine for blocks of natural stone and similar into slabs with diamond wires|CN107073609B|2014-11-03|2019-11-26|意大利贝得里尼独资股份公司|For cutting the multi-thread machine and line compressing apparatus of stone|

法律状态:
2016-06-29| FG2A| Definitive protection|Ref document number: 2542537 Country of ref document: ES Kind code of ref document: B1 Effective date: 20160629 |

优先权:

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申请号 | 申请日 | 专利标题

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ITFI2012A000078|2012-04-20|

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IT000078A|ITFI20120078A1|2012-04-20|2012-04-20|"MACHINE FOR CUTTING STONE AND SIMILAR BLOCKS"|

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PCT/EP2013/058200|WO2013156606A1|2012-04-20|2013-04-19|Machine for cutting stone blocks or the like|

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