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EP0938958B1 - Schneidsegment - Google Patents

Schneidsegment Download PDF

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Publication number
EP0938958B1
EP0938958B1 EP19980870041 EP98870041A EP0938958B1 EP 0938958 B1 EP0938958 B1 EP 0938958B1 EP 19980870041 EP19980870041 EP 19980870041 EP 98870041 A EP98870041 A EP 98870041A EP 0938958 B1 EP0938958 B1 EP 0938958B1
Authority
EP
European Patent Office
Prior art keywords
segment
cutting
segments
protrusions
saw
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.)
Expired - Lifetime
Application number
EP19980870041
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English (en)
French (fr)
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EP0938958A1 (de
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE1998607432 priority Critical patent/DE69807432T2/de
Priority to PT98870041T priority patent/PT938958E/pt
Priority to EP19980870041 priority patent/EP0938958B1/de
Publication of EP0938958A1 publication Critical patent/EP0938958A1/de
Application granted granted Critical
Publication of EP0938958B1 publication Critical patent/EP0938958B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B28D1/121—Circular saw blades

Definitions

  • the present invention relates to cutting segments for circular saw or armor saw, these segments having a particular geometry of the general type known from FR-A-2 399 904. Segments of cut can be obtained by sintering a mixture of powders of a binder, and of an abrasive material such as diamond. Tools with these segments can be used for sawing hard materials, such as Pierre.
  • the invention also relates to a method of realization of the punches necessary for the confection of these segments.
  • the saw cutting segments have general in essence the shape of a parallelepiped rectangle of height X, width l and length L.
  • the form and operating principle of such segments are illustrated in figure 1. It is in the codification of the European Federation of Abrasive Producers that the height of a cutting segment is called "X".
  • Each cutting segment is mounted on the cutting blade saw through his foot.
  • the blade penetrates a material to be sawn, it does it by its face called “cutting face”, which cuts the material and determines the saw line, which increases as and when measurement of the sawing operation, while the segments sink into their height in the saw cut.
  • the segments wear out, which amounts to saying that their height X (between the cutting face and the foot of the segment) decreases.
  • Cutting segments are most often produced by sintering a powder of a binder, with a powder of a abrasive material such as diamond.
  • the powder mixture is introduced into a mold, then compressed with a punch.
  • This punch must be made of a material capable of resist the significant pressures implemented for the production of cutting segments, and must be able to resist to wear in the presence of an abrasive material. He must therefore be made of a hard material, and therefore difficult to machined.
  • the cutting segments described in JP 01 109 079 A and WO 95/22446 have relatively shaped shapes complex, and the punches necessary for their production are therefore difficult to achieve.
  • the object of the present invention is precisely to provide a cutting tool segment that does not have the disadvantages mentioned above. Its purpose is to provide stepped cutting segments that allow for quick and easy transition between two successive stages.
  • a cutting segment for circular or armor saw substantially shaped of rectangular parallelepiped, having a height greater than 5 mm, and comprising several stages.
  • the segment width decreases in successive steps from cutting face of the segment at its base.
  • the landing between a floor and the next lower floor, width reduced, is a bearing parallel to the cutting face of the segment, extended by one or more protrusions of a width equal to the width of the upper floor, spanning a portion of the length and height from the lower floor.
  • the protrusions are advantageously in number one or two per floor.
  • these protrusions have the shape of a half-disc whose diameter is between an eighth and a third of the segment length and is preferably equal to a quarter of the length of the segment.
  • these protrusions have the shape of a triangle.
  • the invention also relates to a saw circular saw or armor saw on which are mounted cutting segments as described previously.
  • the invention also relates to a method of production of punches for the manufacture of segments of section as previously described, in which the successive bearings are obtained by a first machining plan, and the circular protrusions are obtained at by means of a second circular machining.
  • Figure 1 is a schematic sectional view of a part of a saw with diamond segments following the prior art during work in a hard material.
  • Figure 2 is a view similar to that of Figure 1, the segment being eccentric in the saw cut.
  • Figure 3 is a sectional view of another saw according to the prior art, provided with stepped segments, the successive stages being separated by a landing parallel to the cutting face.
  • Figure 4 is a perspective view of a segment according to the prior art, the stages being separated by a bearing inclined with respect to the face of chopped off.
  • Figure 5 is a sectional view of a saw circular according to the prior art, provided with segments stages, the stages being separated by a landing inclined by compared to the cutting face.
  • Figure 6 is a side view of a stepped segment according to the prior art, the stages being separated by a inclined bearing with respect to the cutting face.
  • Figure 7 is a side view of a first embodiment of a segment according to the invention.
  • Figure 8 is a side view of a second form execution of a segment according to the invention.
  • Figure 9 is a perspective view of a third embodiment of a following segment the invention.
  • Figures 10 and 11 illustrate the calculation of the contact surface of the segments with the faces of the line saw.
  • Figure 12 is a graph showing this area contact, depending on the height x remaining at consume, for various forms of following segments the invention and according to the prior art.
  • Figure 1 shows part of a saw blade 1 circular or armor blade according to the prior art, of which a segment 2, 8, 12, 16 is engaged in a line of saw 3.
  • the cutting segment 2, 8, 12, 16 is shaped substantially parallelepiped.
  • the actual sawing is achieved by pressing the cutting face 4 of segment 2 on the bottom of the saw line 3.
  • Abundant watering cools saw 1 and the material to be cut and take away the mud and sawdust.
  • Segments 2, 8, 12, 16 of saw 1 are evenly distributed along of the saw blade and are joined by their foot 5 by an appropriate method, usually soldering.
  • Figure 3 is a sectional view of a saw 1 circular according to the prior art, provided with segments stages 8, the stages of each segment being separated by a bearing parallel to the cutting face.
  • Segment 8 shown at the top of Figure 3 has a fraction of a wide stage 9 which is not yet completely worn out, and a narrow floor 10 not started. In the segment shown in bottom of the figure, the wide stage 9 is completely worn out, and the narrow stage 10 is being worn.
  • This saw circular is rotated around an axis 13. As this is set out above, in this embodiment of the prior art, the transition period between two floors 9 and 10 is particularly difficult.
  • Figure 4 shows a type of stepped segment 12 according to the prior art, the stages being separated by a bearing 11 inclined relative to the cutting face 4. This embodiment aims to improve the conditions of operation of saw 1 during the transition between two floors.
  • Figure 5 shows a circular saw 1 fitted with such segments 12, in which there is shown by the letter E the height of the segment portion extending to both on a wide floor 9 and on a narrow floor 10, hereinafter called the transition zone.
  • the transition zone we have represented the situation where the segment represented at the top of the figure begins the wear of the transition zone between a stage upper 9 of width L2 and a lower stage 10 of width L1, and the segment shown at the bottom of the figure has just finished the wear of this transition zone.
  • This situation can arise for example when the axis of rotation 13 of the saw 1 is offset by a runout E / 2 with respect to the axis of symmetry 14 of saw 1.
  • Figure 6 is a side view of the stepped segment according to prior art 12, shown above in the Figure 5, the floors being separated by an inclined landing with respect to the cutting face.
  • a bearing 11 parallel to the face of section 4 of segment 16 separates each of the stages 17, 18 from immediately lower floors 18, 19.
  • Each floor upper 17, 18 includes one or more protrusions 20, 21 extending the plan of the upper floor towards the low.
  • These protuberances can take any form suitable, for example a half-disc 20 (FIG. 7) or a triangle 21 (figure 8).
  • the number of floors can be between two and five, and is preferably from three.
  • the number of protrusions per level can be between one and five, and is preferably one or two.
  • protuberances 20.21 of the segments according to the invention have a contact surface 15, shown in hatched form at Figures 10 and 11, less than the contact surface, also shown in hatched form in FIG. 6, segments 12 according to the prior art.
  • These protuberances 20.21 therefore disappear quickly by wear against faces of the saw cut in the cut material, ensuring thus a rapid transition.
  • FIG. 12 graphically represents the contact surface S, that is to say the surface remaining to be consumed, as a function of the height x remaining to be consumed, for various types of segments according to the invention and according to the prior art.
  • the curve indicated by squares relates to a segment according to the prior art 12.
  • the curve indicated by triangles relates to a segment according to the invention 16 having protuberances 21 in the form of a triangle.
  • the curve indicated by circles relates to a segment according to the invention 16 having protuberances 20 in the form of a half-disc.
  • the area is shown in mm 2 as a function of the degree of wear x expressed in mm, for usual dimensions of segments.
  • the segments according to the prior art have a length L of 25 mm, and E is 2.5 mm.
  • the protrusions 20 in the form of a half-disc have a radius r of 2.5 mm.
  • E is 2.5 mm and U is 7.85 mm.
  • the contact surfaces of the segments according to the invention 16 are much smaller than the contact surfaces of the segments 12 according to the prior art.
  • the surfaces of contact of the segments according to the invention will therefore be more rapidly eroded during friction with the faces of the cut material, thus ensuring a much transition faster.
  • the two embodiments of protrusions of the above examples are not limiting of the invention. Other specific forms can be carried out without departing from the the invention.
  • the protrusions in the form of a half-disc 20 provide faster decay of the contact surface S.
  • La particular shape of the protrusions 20 in the form of a half-disc has the additional advantage that manufacturing punches necessary for their preparation is easy.
  • a punch intended to make bearings 11 parallel to the cutting face 4. This circular machining is easier than machining a triangle.
  • the punches to 11 parallel bearings are also easier to realize that level 11 inclined punches of art prior. It is even possible to reuse punches used for making segments according to art front 8 with bearings 11 not inclined.
  • the form of realization with protrusions in the form of a half-disc 20 is therefore particularly preferred.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Claims (10)

  1. Schneidesegment (16), für eine Kreissäge oder eine Säge mit verstärktem Sägeblatt (1), im Wesentlichen in der Form eines rechteckigen Parallelepipeds, das eine Höhe von mehr als 5mm aufweist, mehrere Stufen (17; 18; 19) umfasst, wobei die Breite des Segments (16) mit jedem aufeinander folgendem, horizontalem Absatz (11) von der Schneidefläche (4) des Segments (16) bis zu seinem Fuß (5) abnimmt, der Absatz (11) zwischen einer Stufe (17; 18) und der unmittelbar niedrigeren Stufe (18; 19) mit reduzierter Breite ein horizontaler Absatz (11) ist, der parallel zu der Schneidefläche (4) des Segments ist,
    dadurch gekennzeichnet, dass der horizontale Absatz (11) erweitert wird durch eine oder mehrere Ausstülpungen (20; 21) mit einer Breite, die gleich der Breite der höheren Stufe (17; 18) ist, und die sich über einen Teil der Länge und der Höhe der unteren Stufe (18; 19) erstrecken.
  2. Schneidesegment (16) nach Anspruch 1, dadurch gekennzeichnet, dass die Anzahl der Ausstülpungen (20; 21) sich pro Stufe auf zwei beläuft.
  3. Schneidesegment (16) nach Anspruch 1, dadurch gekennzeichnet, dass die Anzahl der Ausstülpungen (20; 21) sich pro Stufe auf eine beläuft.
  4. Schneidesegment (16) nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Ausstülpungen (20) die Form einer halben Kreisscheibe haben.
  5. Schneidesegment (16) nach Anspruch 4, dadurch gekennzeichnet, dass der Durchmesser der halben Kreisscheibe der Ausstülpungen (20) zwischen einem Achtel und einem Drittel der Länge des Segments (16) liegt.
  6. Schneidesegment (16) nach Anspruch 4, dadurch gekennzeichnet, dass der Durchmesser der halben Kreisscheibe der Ausstülpungen (20) im Wesentlichen gleich einem Viertel der Länge des Segments (16) ist.
  7. Schneidesegment (16) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Ausstülpungen (20) die Form eines Dreiecks haben.
  8. Kreissäge (1), auf der Schneidesegmente (16) gemäß einem der Ansprüche 1 bis 7 montiert sind.
  9. Säge mit verstärktem Sägeblatt (1), auf der Schneidesegmente (16) gemäß einem der Ansprüche 1 bis 7 montiert sind.
  10. Verfahren zur Herstellung von Stempeln für die Produktion von Schneidesegmenten (16) gemäß einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass
    die aufeinander folgenden, horizontalen Absätze (11) durch eine erste, ebenflächige maschinelle Bearbeitung hergestellt werden und die kreisförmigen Ausstülpungen mit Hilfe einer zweiten, kreisförmigen maschinellen Bearbeitung hergestellt werden.
EP19980870041 1998-02-27 1998-02-27 Schneidsegment Expired - Lifetime EP0938958B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE1998607432 DE69807432T2 (de) 1998-02-27 1998-02-27 Schneidsegment
PT98870041T PT938958E (pt) 1998-02-27 1998-02-27 Segmento de ferramenta de corte
EP19980870041 EP0938958B1 (de) 1998-02-27 1998-02-27 Schneidsegment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19980870041 EP0938958B1 (de) 1998-02-27 1998-02-27 Schneidsegment

Publications (2)

Publication Number Publication Date
EP0938958A1 EP0938958A1 (de) 1999-09-01
EP0938958B1 true EP0938958B1 (de) 2002-08-28

Family

ID=8237003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980870041 Expired - Lifetime EP0938958B1 (de) 1998-02-27 1998-02-27 Schneidsegment

Country Status (3)

Country Link
EP (1) EP0938958B1 (de)
DE (1) DE69807432T2 (de)
PT (1) PT938958E (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100804049B1 (ko) * 2006-11-16 2008-02-18 신한다이아몬드공업 주식회사 다이아몬드 공구 및 다이아몬드 공구의 세그먼트 제조방법

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3590535A (en) * 1969-04-24 1971-07-06 Federal Mogul Corp Diamond abrasive saw blade
DE7724960U1 (de) * 1977-08-11 1977-11-24 Ernst Winter & Sohn (Gmbh & Co), 2000 Hamburg Kreissäge
US4787362A (en) * 1986-10-20 1988-11-29 Thermocarbon, Inc. Abrasive blade having a polycrystalline ceramic core
JPH06102304B2 (ja) * 1987-12-26 1994-12-14 大阪ダイヤモンド工業株式会社 ソーブレード
JPH0722896B2 (ja) * 1990-01-04 1995-03-15 大阪ダイヤモンド工業株式会社 超砥粒回転ブレード

Also Published As

Publication number Publication date
DE69807432D1 (de) 2002-10-02
PT938958E (pt) 2003-01-31
EP0938958A1 (de) 1999-09-01
DE69807432T2 (de) 2003-05-15

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