EP3600813A1 - Self-cleaning chain with modular outer link for ornamental stones chain cutting machines - Google Patents
Self-cleaning chain with modular outer link for ornamental stones chain cutting machinesInfo
- Publication number
- EP3600813A1 EP3600813A1 EP18715965.2A EP18715965A EP3600813A1 EP 3600813 A1 EP3600813 A1 EP 3600813A1 EP 18715965 A EP18715965 A EP 18715965A EP 3600813 A1 EP3600813 A1 EP 3600813A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chain
- cutting
- links
- outer link
- lateral
- 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
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 62
- 239000004575 stone Substances 0.000 title claims abstract description 17
- 238000004140 cleaning Methods 0.000 title abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 52
- 238000003754 machining Methods 0.000 claims abstract description 7
- 230000004888 barrier function Effects 0.000 claims 1
- 238000005452 bending Methods 0.000 claims 1
- 230000000295 complement effect Effects 0.000 claims 1
- 238000009760 electrical discharge machining Methods 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 4
- 125000004122 cyclic group Chemical group 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract 1
- 239000010802 sludge Substances 0.000 description 14
- 239000000428 dust Substances 0.000 description 8
- 206010039509 Scab Diseases 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
- B28D1/12—Saw-blades or saw-discs specially adapted for working stone
- B28D1/124—Saw chains; rod-like saw blades; saw cables
Definitions
- the present invention generally regards the technology of ornamental stones chain cutting machines, like the ones normally used in ornamental stones (marble, etc.) excavation quarries. Specifically, the invention regards the chain formed by inner links and outer links that carry the cutting tools.
- the inventive concept generally applies to chains of all types with all types of insert-holders and cutting inserts, to any type of arrangement of the cutting inserts on the chain, to all methods of application of the insert on the insert-holder (removable and non-removable type).
- the chain of the invention can be mounted on any arm of the chain cutting machine of any type known in the prior art regarding the excavation of ornamental stones in quarries.
- the materials the chain of the invention can be made up of are the ones usually used in the industry (thus even the ones known in the prior art for obtaining inserts, insert- holders, elements for connection between the inner and outer links, etc.).
- the inner and outer links are alternating forming the endless chain, which, as known, is mounted in the guide of the orientable arm of the machine.
- the orientable arm has a pinion for actuating the chain at one end thereof and a pinion or idler wheel of the chain at the other end (free end).
- each inner link (108) has - at the upper part - a respective recess (106) suitable to receive the projections (105) in a straight configuration (see Fig. 13 A) of the links of the chain.
- the upper part (107, 107) of the end of the inner link (108) can be rounded on both sides thereof, to facilitate the exit of any impurities, of extremely small dimensions, which could accumulate in the interspace (104) of the concavities (100).
- Fig. 13B shows only a portion (of the known chain), comprising an outer link and two inner links (108, 108) connected in an articulated fashion; it should be observed that the part 102' of the modular outer link (102, 101, 102') was removed/demounted in Fig. 13B to show the internal.
- Fig. 13B shows the situation is illustrated when said chain portion is no longer straight and the inner links (108, 108) rotate given that the chain portion is forced to rotate around the pinion/idler wheel.
- an object of the present invention is to provide a chain with modular outer link, for ornamental stones chain cutting machines, capable of preventing the accumulation of sludge and the ensuing hardening thereof in the recess formed on the upper wall of the inner link.
- Another object of the present invention is to use simple means and technical solutions, so as to avoid substantially increasing production costs with respect to conventional chains.
- Said push and lateral ejection means have the function of cyclically pressing on the material which is normally deposited on a recess of the inner link in the position adjacent to the inlet of the interspace which extends around the articulation of the two adjacent links (outer, inner).
- Such pressure cyclic effect of potential breaking of the crust (if the material has hardened), and of lateral ejection of the material, occurs periodically and automatically due to the rotation, around a pinion of the guide and support orientable arm, and to the subsequent realigning of each chain portion, facilitated by the means of the invention.
- the invention provides a "self-cleaning" chain, which exploits the same movement i.e. the kinematics of the roto-translational motion of the chain around and between the drive and idler pinions.
- the means of the invention form wedges having a constant section profile in the direction of longitudinal extension of the outer link.
- Such wedges for pushing and lateral ejection of the material generated by the cutting act through the tip thereof with linear extension, with a tip load, on the material that is deposited on the inner link at the inlet with the interspace, and they simultaneously press - with the isosceles triangle inclined walls thereof - against the material, pushing it towards the sides of the chain, where other means of the invention (openings, slots) are provided for which enable the material to exit from the chain, or rather from the outer link thereof, without any interference.
- the wedges for pushing and lateral ejection of the material will be described in detail in the detailed description that follows; each of them preferably consists of a single piece with the outer link, under one of the projections.
- the invention provides means which, with reasonable costs, enable overcoming a quite considerable problem of the industry. Basically (in the preferred embodiment of the invention) it is a matter of modifying the outer links only, while all other components of the chain may remain unvaried.
- FIGURE 1 is a front view of a chain portion of the invention (with a part of the outer link intentionally removed to simplify the description), which illustrates the problem of accumulation of sludge/dust under the projection of the outer link at the inlet of the interspace, during the relative rotation between the inner link and the outer link;
- FIGURE 2 is a perspective view of the same chain portion represented in Fig. 1, which shows the solution of the problem, i.e. the lateral ejection of sludge/dust from the chain;
- FIGURE 3 A is the vertical section of III-III of Fig. 1, which shows the shape (in cross- section) of the wedge for pushing the material (sludge/dust) for ejection;
- FIGURE 3B is a view corresponding to an enlarged detail of Fig. 3 A but in which the action is shown of the wedge for pushing and the lateral ejection of the material;
- FIGURE 4 A shows the outer link of the invention only, in a front view
- FIGURE 4B is a detail of FIG. 4A, in which the lateral slot for the ejection of the material is clearly shown;
- FIGURE 5 is an exploded perspective view of the modular outer link only of the self- cleaning chain of the present invention.
- FIGURE 6 is a front view of the outer link of Fig. 5, partly assembled, without a lateral component, to make the relative position between the pushing wedge and the lateral slot for the exit of the material (sludge/dust) visible;
- FIGURE 7 is a top plan view of the outer link fully assembled
- FIGURE 8 is a front view of a first component (or left side, or left lateral part) of the modular outer link of the invention.
- FIGURE 9 is a vertical cross-sectional view along line IX-IX of Fig. 8.
- FIGURE 10 is a front view of the other component (or right side, or right lateral part) of the modular outer link of the invention.
- FIGURE 11 is a cross-sectional view along line XI-XI of Fig. 10;
- FIGURE 12A is a front view of the central part or component of the outer link comprising the two concavities (already known) and - at the end - the two pushing and ejection wedges (present invention);
- FIGURE 12B is a top plan view (arrow P) according to Fig. 12A;
- FIGURE 12C is an end view (arrow Q) on the rear part - with reference to the direction of motion V (see Fig. 12 A) of the chain - which shows the shape of the wedge for pushing to eject the material;
- FIGURE 13 A is homologous to the one of Fig. 1, but showing the chain of the prior art
- FIGURE 13B illustrates the operation of the chain of the prior art of Fig. 13 A, which prevents the entry of the material (sludge/dust) into the outer link (interspace (104) between the inner and outer link around the articulation (109) but it does not fully overcome the problem related to the malfunctioning of the chain due to the accumulation and hardening of the sludge;
- FIGURE 13C is an exploded perspective view of the modular outer link and the inner link according to the prior art previously represented in Figs. 13A, B.
- the endless chain of the present invention in this preferred but non-limiting or non-binding embodiment, comprises a plurality of outer links 1 and inner links 2.
- Fig. 2 shows by way of example only a chain portion formed by an outer link 1 and by two inner links 2, 2 which project therefrom and thus visible only partly.
- the inner 1 and outer 2 links follow each other in an alternating fashion, and they will not be shown as a complete chain to avoid complicating the drawing.
- the outer link 1 consists of (in the present preferred and non-binding embodiment) three parts, 3a, 3b, 3c fixed to each other by means of fixing means 4a, 4b introduced into suitable holes.
- Such fixing means can be of various types (conical counter-sunk head screws, etc.), they are used for joining the parts of the outer link to each other and resist against forces during the cutting of the ornamental stone.
- the assembly shown in Fig. 5 is already known, besides the innovative characteristics to be described hereinafter.
- Fig. 1 represents the same chain portion of Fig. 2, in which the part 3c of the outer link 1 was however removed with the aim of making a side of the two adjacent inner links 2, 2 entirely visible, was however removed.
- the outer link 1 is the one that supports the tool holder and the tool, which were not represented for the sake of comfort.
- the arrow R indicates in Fig. 1 the advancement direction of the endless chain.
- the inner links 2 are connected in an articulated fashion to the outer links 1 by means of articulation pins 5 inserted into respective holes 5' and 5" of the outer and inner links, respectively.
- the shape of the pins 5 is the one previously described in the documents of the prior art mentioned above (see articulation pin (111) of Fig. 13C), i.e. with a cylindrical central portion with larger radius and two cylindrical lateral portions (end portions) with smaller radius, so as to guarantee an abutment with the inner sides of the parts 3a and 3c of the outer link, respectively.
- a wedge 12 for pushing and ejecting the material 9 is formed under the projection 10.
- said wedge 12 forms a single piece with the lower part of the projection 10, i.e. it is made of a single piece with the intermediate part 3b of the chain.
- the wedge 12 is symmetrical (isosceles triangle), in transversal section, as shown in particular in the sections of Fig. 3 A, B, thus giving rise to a linear tip compression action line on the material, as shown in particular in Fig. 3B, in which the material 9 is literally broken/crushed by the tip 13 of the wedge and ejected laterally at the same time (Fig. 3B), each time the chain links are realigned with respect to each other at the exit from the idler pinion or at the exit from the drive pinion, respectively (see for example arrow R, Fig. 1).
- Figure 2 in particular shows the ejection (arrows S) of the material from the chain, caused by the pushing and ejection wedge 12 of the present invention.
- the lateral parts 3a and 3c (also see Fig. 5) of the modular outer link 1 each have slot openings 13 which enable the exit of the material on both sides of the ornamental stone cutting chain.
- first wedge 12 for pushing and ejecting the material is provided for close to the cutting tool (not shown) while a second wedge 12 for pushing and ejecting the material is provided for at the opposite end of the outer link 1 of the chain with respect to the cutting tool.
- the base of the projection (105) - with flat-shaped surface at the lower part - substantially reaches the upper wall of the recess (106) of the outer link (108).
- said wedge 12 for pushing and ejecting the material preferably has its tip 13 which substantially reaches (i.e., touches) the upper flat surface of the recess 11 of the inner link 2. This is due to the fact that the cutting chain is more stable during operation.
- the upper end of the outer link on the opposite side with respect to the cutting tool has a chamfer 14 inclined downwards and outwards with respect to each outer link 1. Such chamfer 14 on the outer link 1 is for example visible in Fig. 4A.
- such chamfer 14 in this embodiment consists of three identical chamfers formed in the respective parts 3a, 3b, 3c.
- the chamfer 14 is not present in the corresponding relief (112) of the prior art (for example see Fig. 13A) and it serves to prevent the consumption of the material of the relief (112) which occurs - in case of some types of tools - during the operation of the cutting chain of the prior art.
- the chamfer 14 could be absent, given that no wear of structural material is observed at this point.
- the outer link preferably consists of three parts, especially due to production reasons, the outer link could also consist of only two modular parts, wherein one of the portions (3a or 3c) is integrally joined to the intermediate part 3b and it is fixed to the other part (3c or 3a) by means of mechanical fixing means 4a and 4b (screws or any other means).
- the assembly process is once again firstly carried out in three separate parts 3a - 3b - 3c, thus welding the lateral plate 3a or 3c by means of a laser or other means to the intermediate plate 3b, so as to obtain a single piece (3a + 3b or 3c + 3b) and lastly mechanically fixing such single piece to the remaining lateral plate 3c or 3a.
- the advantage thereof lies in the possibility to use the mechanical fixing means (preferably only on one side) with a longer stem, and thus - for example - screws with a longer threaded stem or with several threads, or in other words, a screw with greater fastening.
- the mechanical fixing means preferably only on one side
- two screws 4a inserted from opposite sides but on the same geometrical axis inevitably have a smaller stem and lesser fastening.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Sawing (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT102017000030399A IT201700030399A1 (en) | 2017-03-20 | 2017-03-20 | SELF-CLEANING CHAIN WITH EXTERNAL KNITTING MODULAR FOR CHAIN SAWING MACHINES OF ORNAMENTAL STONES. |
PCT/IB2018/051685 WO2018172884A1 (en) | 2017-03-20 | 2018-03-14 | Self-cleaning chain with modular outer link for ornamental stones chain cutting machines |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3600813A1 true EP3600813A1 (en) | 2020-02-05 |
EP3600813B1 EP3600813B1 (en) | 2021-05-05 |
Family
ID=59699984
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18715965.2A Active EP3600813B1 (en) | 2017-03-20 | 2018-03-14 | Self-cleaning chain with modular outer link for ornamental stones chain cutting machines |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3600813B1 (en) |
ES (1) | ES2881501T3 (en) |
IT (1) | IT201700030399A1 (en) |
PT (1) | PT3600813T (en) |
WO (1) | WO2018172884A1 (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4619172A (en) * | 1985-07-05 | 1986-10-28 | Rafael Perez | Cutting saw for grinding solid materials |
IT1241916B (en) * | 1990-12-19 | 1994-02-01 | Ditel Centro Ligure Per La Dif | Cutting chain for sawing machines with a cutting chain for quarrying of slate, marble, granite and rock minerals in general |
ITRM20120105A1 (en) * | 2012-03-21 | 2013-09-22 | Fantini Sud S P A | MODULAR GUIDE PIECE, MODULAR GUIDE, AND ARM OF A SAWING CHAIN OF ORNAMENTAL STONES WITH SUCH MODULAR GUIDE. |
ITRM20130173A1 (en) | 2013-03-22 | 2014-09-23 | Fantini Sud S P A | CHAIN WITH MODULAR EXTERNAL JERSEYS, FOR CHAIN SAWING MACHINES OF ORNAMENTAL STONES. |
ITRM20130330A1 (en) | 2013-06-07 | 2014-12-08 | Fantini Sud S P A | CHAIN WITH THREE-COMPONENT EXTERNAL SWEATERS, FOR CHAIN SAWING MACHINES OF ORNAMENTAL STONES. |
EP3177443B1 (en) * | 2014-08-06 | 2018-09-19 | Fantini Sud S.p.A. | Chain for saw machines for cutting ornamental stones, adapted to prevent the entrance of impurities between the internal link and the external link of the chain |
-
2017
- 2017-03-20 IT IT102017000030399A patent/IT201700030399A1/en unknown
-
2018
- 2018-03-14 EP EP18715965.2A patent/EP3600813B1/en active Active
- 2018-03-14 PT PT187159652T patent/PT3600813T/en unknown
- 2018-03-14 ES ES18715965T patent/ES2881501T3/en active Active
- 2018-03-14 WO PCT/IB2018/051685 patent/WO2018172884A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
IT201700030399A1 (en) | 2018-09-20 |
PT3600813T (en) | 2021-08-03 |
ES2881501T3 (en) | 2021-11-29 |
WO2018172884A1 (en) | 2018-09-27 |
EP3600813B1 (en) | 2021-05-05 |
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