WO2007057282A1 - Meule tronçonnage - Google Patents

Meule tronçonnage Download PDF

Info

Publication number
WO2007057282A1
WO2007057282A1 PCT/EP2006/067781 EP2006067781W WO2007057282A1 WO 2007057282 A1 WO2007057282 A1 WO 2007057282A1 EP 2006067781 W EP2006067781 W EP 2006067781W WO 2007057282 A1 WO2007057282 A1 WO 2007057282A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
area
region
cutting element
line
Prior art date
Application number
PCT/EP2006/067781
Other languages
German (de)
English (en)
Inventor
Markus Niederhauser
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2007057282A1 publication Critical patent/WO2007057282A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/12—Cut-off wheels
    • B24D5/123—Cut-off wheels having different cutting segments

Definitions

  • the invention relates to a cutting disc, in particular a diamond cutting disc, according to the preamble of claim 1.
  • known diamond cutting discs which consist of a disc-shaped body made of metal and an annular cutting area on the circumference of the body.
  • the annular cutting area is in the form of cutting segments and consists of a matrix of metal containing diamond grains.
  • the cutting segments are e.g. connected by laser welding or sintering with the disc-shaped body.
  • different geometries of the segments are known, e.g. to improve the cutting performance of the cutting wheel, its cooling or the removal of dust generated during dry cutting.
  • the object of the present invention is to provide a cutting disc which enables a higher cutting speed.
  • the invention relates to a cutting disc having the features of claim 1.
  • the cutting disc according to the invention is provided on at least one side surface of the cutting region with at least one cutting element which protrudes from the side surface.
  • the at least one protruding cutting element ensures a reduction in derte friction of the cutting area with the material to be machined and therefore allows an increased cutting speed.
  • the cutting disc according to the invention comprises a disc-shaped body with a central opening for receiving a drive spindle.
  • the disk-shaped body is also referred to below as a master sheet.
  • the master sheet has e.g. a diameter in the range of 100 to 600 mm.
  • the disc-shaped body is surrounded by an abrasive containing annular cutting area, wherein the cutting area is thicker than the disc-shaped body.
  • the thickness of the stem blade is, for example, 1 to 5 mm, and the thickness of the annular cutting region is 1.5 to 8 mm, for example.
  • the annular cutting area has a height of, for example, 5 to 15 mm. The height of the cutting area indicates the extent of the cutting area in the radial direction.
  • the two substantially mutually parallel surfaces of the cutting area are considered, which extend in the radial direction.
  • the annular cutting area is insoluble at the periphery of the master blade, e.g. by sintering, laser welding, laser melting or brazing. Laser welding, laser melting, sintering or the like. for connecting the cutting area with the master sheet takes place in a designated below as the connection area area between the master sheet and cutting area.
  • the master blade is made of metal, in particular of steel, and the cutting area contains diamonds as an abrasive.
  • the diamonds are embedded in a prior art metallic carrier material formed by sintering or casting (laser melting).
  • sintering or casting laser melting
  • other hard abrasives such as cubic boron nitride, can also be used.
  • segmented cutting disk in particular a segmented diamond cutting disc, ie the annular cutting region is segmented.
  • Segmented cutting discs are basically known from the prior art.
  • the segments for example with regard to their length and number, can be selected correspondingly to the application of the cutting disk.
  • each segment of the cutting area has at least one cutting element.
  • the at least one cutting element preferably consists of the same material as the cutting region itself and is in particular formed integrally with the cutting region. But it can also consist of other materials, such as carbide.
  • the at least one cutting element is preferably formed in one step with the cutting region of a diamond-containing metallic carrier material by sintering or casting (laser melting).
  • the at least one cutting element protrudes by 0.1 to 0.5 mm, particularly preferably by 0.2 to 0.3 mm.
  • At least one cutting element is preferably provided on both side surfaces of the annular cutting region. If at least one cutting element is arranged on each of the two side surfaces, the friction is lower, and thus the cutting speed is higher, than when a cutting element is applied only on one side surface.
  • the cutting elements on the two side surfaces can be arranged arbitrarily to each other.
  • the at least one cutting element may be arranged on the one side face of the cutting area symmetrically to the at least one cutting element on the other side face.
  • the cutting elements of a side surface can also be applied offset to the cutting elements of the other side surface.
  • the geometric shape of the cutting elements on the two side surfaces may be the same or different.
  • the cutting element preferably extends over the entire height of the cutting area, but at least over the part of the height, from the outer periphery of the cutting area to the connection area between cutting area and master blade ranges. This subregion of the cutting region between the outer circumference and the connecting region is also referred to below as the free region of the cutting region.
  • the at least one cutting element is preferably linear.
  • the linear cutting element preferably forms a continuous line.
  • the line can be arbitrarily bent or kinked.
  • the continuous line is particularly preferably a wavy, zigzag or rectangular line.
  • closed edge can be provided on both side surfaces, for example, in each case a continuous wave-shaped line.
  • the undulating line may also be interrupted at one or more locations without significantly affecting the friction reducing effect of the cutting element.
  • a continuous wave-shaped line is preferably provided on both side surfaces of each segment.
  • the wavy lines of one or more segments may be interrupted once or several times. This means that in each case two or more line-shaped cutting elements are provided on the segments of the cutting area.
  • the line-shaped cutting elements on the two side surfaces can be arbitrarily, e.g. symmetrical or offset, to each other.
  • the linear cutting elements of adjacent segments can also be arranged as desired.
  • a wave crest can be arranged on the lateral edge of a first segment and also a wave crest or wave trough or any other point of a wavy line on the lateral edge of a second, adjacent segment.
  • the geometry of the linear cutting element is chosen so that on the one hand, the cutting element does not wear too quickly and on the other hand, the cutting element itself does not generate too much friction. If the at least one cutting element takes up too large a surface, the friction between the cutting element and the material to be processed is too great, so that a friction-reducing effect is no longer achieved.
  • the geometry of the line-shaped cutting element is preferably selected such that the line extends over the entire height of the cutting region, but at least over the height of the free region of the cutting region, ie excluding the connection region.
  • the linear cutting element is, for example, a continuous wave-shaped line, it is thus arranged so that the wave peaks lie on the outer circumference of the cutting region and the wave troughs on the inner circumference or in or on the connection region between the cutting region and master blade. If the linear cutting element extends over the entire height or at least over the free area of the cutting area, this has the advantage that, despite wear of the cutting area, the friction-reducing effect of the cutting element is maintained.
  • the geometry of the line-shaped cutting element is preferably selected such that the area of the cutting area which occupies the at least one cutting element is not too large, otherwise the friction surface between cutting element and material to be processed is too large.
  • increases in a continuous wave-shaped line as a cutting element the friction surface with decreasing wavelength.
  • a segmented diamond blade having a diameter of 230 mm achieves a friction-reducing effect when e.g. in an approximately 30 ° cutting segment two to four wavelengths are executed.
  • the friction surface of the line-shaped cutting element increases with increasing width of the line. Therefore, the line-shaped cutting element preferably has a width of 1 to 3 mm, e.g. of 2 mm, has. If the linear cutting element is too narrow, it will wear out too quickly. If, however, the line-shaped cutting element is made too wide, the friction surface increases and the cutting speed is consequently lower.
  • the cutting wheel according to the invention can be used in different machine tools, e.g. used in angle grinders, hand-held cut-off grinders, wall milling cutters, slot cutters, gasoline saws, table saws, floor saws and hand saws.
  • FIG. 1 shows an embodiment of the cutting disc according to the invention in plan view
  • FIG. 2 shows a cross section through the cutting disk according to FIG. 1
  • the cutting wheel 10 shown in Figure 1 has a disc-shaped body (master blade) 20 made of metal with a central opening 21 for receiving a drive spindle (not shown). At the periphery 22 of the stem blade 20, an annular cutting portion 30 is formed.
  • the annular cutting area 30 is segmented 31. In the illustrated embodiment, the cutting area is subdivided into 16 segments 31.
  • the cutting segments 31 are made of a metallic carrier material in which diamond grains are embedded as abrasives.
  • the cutting segments 31 are e.g. formed by sintering or casting (laser melting) and e.g. by sintering, laser melting or laser welding inextricably linked to the master sheet.
  • a wave-shaped line 32 is in each case arranged as a linear cutting element.
  • the cutting element is according to the invention from the side surface of the cutting portion 30, here the cutting segments 31, forth.
  • the cutting area 30 is thicker than the master sheet 20.
  • H the total height of the cutting area, i. the extent of the cutting region 30 in the radial direction.
  • the wavy line 32 extends in the illustrated embodiment substantially over the entire height H of the cutting segment 31, i. a wave crest of the wavy line 32 extends substantially from the outer periphery 33 of the cutting region to the periphery 22 of the stem blade.
  • the connecting region 34 which adjoins the circumference 22 of the master blade and in which the master blade 20 is connected to the annular cutting region 30. That the wavy line 32 extends at least over the free area 35 of a cutting segment 31 which expands between the outer periphery 33 and the connecting area 34.
  • FIG. 2 the blade according to Figure 1 is shown in cross section.
  • the master blade 20 of the blade 10 has a central opening 21 and carries at its periphery 22 the abrasive, e.g. Diamond-containing annular cutting portion 30 which is thicker than the master sheet 20.
  • abrasive e.g. Diamond-containing annular cutting portion 30 which is thicker than the master sheet 20.
  • On both side surfaces 36, 36 'of the cutting portion 30 is a respective linear cutting element 32 in the form of a wave-shaped line 32 (FIG. 1), which is integral with the cutting region 30 is formed and each protruding from the side surfaces 36, 36 '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

L'invention concerne une meule de tronçonnage comprenant un corps en forme de disque (20) avec une ouverture centrale (21) pour recevoir une broche d'entraînement et une zone de coupe (30) de forme annulaire contenant de l'abrasif à la périphérie (22) du corps en forme de disque (20), la zone de coupe (30) étant plus épaisse que le corps (20). Sur au moins une surface latérale (36, 36') de la zone de coupe (30) est disposé au moins un élément de coupe (32) qui dépasse de la surface latérale (36, 36').
PCT/EP2006/067781 2005-11-15 2006-10-26 Meule tronçonnage WO2007057282A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005054389.8 2005-11-15
DE200510054389 DE102005054389A1 (de) 2005-11-15 2005-11-15 Trennscheibe

Publications (1)

Publication Number Publication Date
WO2007057282A1 true WO2007057282A1 (fr) 2007-05-24

Family

ID=37492411

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/067781 WO2007057282A1 (fr) 2005-11-15 2006-10-26 Meule tronçonnage

Country Status (2)

Country Link
DE (1) DE102005054389A1 (fr)
WO (1) WO2007057282A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9227342B2 (en) * 2012-12-31 2016-01-05 Saint-Gobain Abrasives, Inc Abrasive article having abrasive segments with shaped gullet walls

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2808044A (en) * 1955-12-21 1957-10-01 Carborundum Co Diamond abrasive blades
US4940039A (en) * 1987-04-16 1990-07-10 Rudolf Buettner Cutting tool
US5505189A (en) * 1990-04-27 1996-04-09 Chiuminatta; Edward Apparatus and method cutting unhardened concrete

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2808044A (en) * 1955-12-21 1957-10-01 Carborundum Co Diamond abrasive blades
US4940039A (en) * 1987-04-16 1990-07-10 Rudolf Buettner Cutting tool
US5505189A (en) * 1990-04-27 1996-04-09 Chiuminatta; Edward Apparatus and method cutting unhardened concrete

Also Published As

Publication number Publication date
DE102005054389A1 (de) 2007-05-16

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122 Ep: pct application non-entry in european phase

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