WO2012152458A1 - Lame de scie - Google Patents

Lame de scie Download PDF

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Publication number
WO2012152458A1
WO2012152458A1 PCT/EP2012/052736 EP2012052736W WO2012152458A1 WO 2012152458 A1 WO2012152458 A1 WO 2012152458A1 EP 2012052736 W EP2012052736 W EP 2012052736W WO 2012152458 A1 WO2012152458 A1 WO 2012152458A1
Authority
WO
WIPO (PCT)
Prior art keywords
saw
saw teeth
blade
teeth
saw blade
Prior art date
Application number
PCT/EP2012/052736
Other languages
German (de)
English (en)
Inventor
Milan Bozic
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
Priority to EP12705110.0A priority Critical patent/EP2704866A1/fr
Priority to CN201280022050.9A priority patent/CN103517779A/zh
Priority to KR1020137029292A priority patent/KR20140021000A/ko
Publication of WO2012152458A1 publication Critical patent/WO2012152458A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D51/00—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends
    • B23D51/08—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of devices for mounting straight saw blades or other tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/12—Straight saw blades; Strap saw blades
    • B23D61/128—Sabre saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/12—Straight saw blades; Strap saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/12—Straight saw blades; Strap saw blades
    • B23D61/121—Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/12—Straight saw blades; Strap saw blades
    • B23D61/123—Details of saw blade body

Definitions

  • the invention relates to a saw blade along with a tooth side of a
  • PRIOR ART DE 200 02 593 IM discloses a saw blade for a stabbing or saber saw which has a straight-sided blade carrier with saw teeth on one side of the blade carrier.
  • the saw teeth have a trapezoidal cross section, the blade carrier, however, is formed with a constant thickness with parallel side walls.
  • the saw teeth dip into the material of the workpiece, whereby due to the larger thickness of the saw teeth in the region of their free end face, there is an open position between the blade walls and the cut walls in the workpiece. This reduces friction and improves the dissipation of heat generated during workpiece machining.
  • the saw blade according to the invention can be used in machine tools, in particular in hand power tools with motor drive, wherein the saw blade can be formed as stitch or Sabersaw blade, which executes a preferably rectilinear, oscillatory sawing movement.
  • the saw blade has a preferably rectilinear sheet carrier, on one side of which leaf saw teeth are arranged.
  • the saw teeth preferably extend along a straight line, but in principle they can also be arranged along an at least slightly curved line.
  • the saw teeth which extend along a tooth side of the blade carrier and are integrally formed with the blade carrier, are made stiffened, so that successive teeth are bent alternately to the right and left, with respect to the longitudinal center plane of the saw blade. At least one side surface of the saw teeth is ground in such a way that this side surface at least in sections has a concave wall shape or is approximated to a concave wall shape.
  • the saw teeth Due to the offset, the saw teeth extend beyond the side wall of the blade support at least on one side surface so that a sufficiently large clearance is achieved in the workpiece machining with a distance between the side walls of the blade carrier and the inner walls of the cut in the workpiece, which reduces the friction and improves the heat dissipation. At the same time, due to the offset
  • the side surface of the saw teeth can be ground in such a way that the transition from the blade carrier to the saw teeth is at least approximately concave, so that the transition from the blade carrier to the saw teeth to the first derivative runs steadily and force peaks and thermal peaks are avoided.
  • the risk of sawdust depositing on the side surfaces or walls is reduced.
  • Such a saw blade can be produced in a simple and advantageous manner.
  • the saw teeth are firstly ground in a first production step, and subsequently at least one of the side surfaces of the saw teeth is ground in a second production step in such a way that the side surface assumes a concave wall shape at least in sections or approximates to such a concave wall form is.
  • the side surface on the saw teeth takes after the cabinets against the side wall of the blade carrier a Wnkel a.
  • the side surface is reground until the desired shape is achieved with approach to the concave wall shape.
  • an at least approximately concave wall shape over the entire height of the saw teeth is achieved, even if the regrinding is limited to a partial height of the saw teeth.
  • the area of the saw teeth which extends to the tooth tip, subjected to regrinding. If only a partial height is ground, it may be sufficient, for example, for the ground area to extend over at least two thirds of the tooth height.
  • a central tooth side region projects laterally beyond the grinding process via a concave ideal line, whereas the lateral surface in the region of the tooth tip preferably lies exactly on the concave line.
  • a good approach to the concave line is achieved after grinding, with deviations expediently be in the percent range, in particular less than 5%, based on the total width of the saw teeth.
  • the concave portion preferably extends to the blade carrier or at least approximately to the blade carrier.
  • the blade carrier itself may be at least partially concave shaped.
  • the blade carrier can be subdivided in its height into a base portion and a support portion, which is carrier of the saw teeth, wherein the support portion has a concave wall shape, whereas the base portion preferably has parallel side walls.
  • At least one side surface of the saw teeth is reground over the entire height, ie from the tooth tip to the blade carrier.
  • both side surfaces of the saw teeth are at least partially concave or approximated to a concave wall shape. This is preferably achieved by the saw teeth are set and then reground both side surfaces.
  • the saw blade is advantageously constructed symmetrically to a median plane through the blade carrier.
  • the widest part of the saw blade is in the area of the tooth tips.
  • the saw teeth have at their widest point a thickness which is at most 50% or 45%, preferably at most 35% and in particular between 17% and 33% greater than the thickness of the sheet carrier.
  • the width of the saw teeth is at least 20% greater than the thickness of the blade carrier.
  • the sheet thickness is for example 0.8 mm or 1.0 mm, the thickness of the saw teeth at the widest point, for example 1.05 mm or 1.25 mm.
  • the saw teeth are produced for example by punching or milling and have a roughness of at least 1.6. In the reground area, the roughness may be reduced.
  • the saw blade produced in this way can be used for the machining of thermoplastic workpieces, for example for workpieces made of PP, PE, PVC, PC, POM, PET, PA, PS or PMMA. Due to the at least approximately concave side surface of the saw teeth, the heat dissipation is improved. sert, whereby a melting of the thermoplastic workpieces can be avoided.
  • saw blades with different tooth parameters can be used for processing different thermoplastic workpieces.
  • the tooth pitch is advantageously in a range between 1.0 mm and 3.5 mm, the clearance angle in a range between 20 ° and 85 °, the rake angle in a value range between 0 ° and 20 ° and the manufacturing angle between 30 ° and 90 °.
  • the chip space depth can be between 1 mm and 4 mm.
  • thermoplastics such as PP, PE (modulus ⁇ 2500 MPa, ball hardness ⁇ 150 MPa) in combination with the described cross section is a relatively large pitch (> 3.5mm, especially> 4.0mm), clearance angle> 20 ° to ⁇ 45 ° (in particular 25 °), rake angle> 0 ° to ⁇ 20 ° (in particular 10 °) and a lateral tooth angle of 90 ° advantageous.
  • thermoplastics such as, for example, PVC, PC, POM, PET, PA, PS (modulus> 2500 MPa, ball hardness> 120 MPa) in combination with the described cross section, a tooth pitch> 1.5 mm (in particular> 2.2 mm, especially preferred) to> 2.3 mm), first clearance angle> 25 ° to ⁇ 70 ° (in particular 45 °), second clearance angle> 30 ° to ⁇ 75 ° (in particular 70 °), rake angle> 0 ° to ⁇ 10 ° (in particular 3 °), Chip space depth> 1.0 mm and ⁇ 3.0 mm (in particular 2.2 mm, particularly preferred 2.3 mm), ratio chip space depth / tooth spacing min. 0.5 (especially at least 1.0, more preferably at least 1.1) and a lateral tooth angle of ⁇ 90 ° (preferably between about 60 ° and about 80 °, more preferably between 65 ° and 75 °, in particular 65 °).
  • a tooth pitch is> 1.0 mm (in particular> 1.8 mm), first clearance angle> 25 ° to ⁇ 70 ° ( in particular 40 °); second clearance angle> 30 ° to ⁇ 85 ° (in particular 75 °), rake angle> 0 ° to ⁇ 10 ° (in particular 5 °), chip space depth> 1.0mm to ⁇ 4.0mm (especially 2.6mm), ratio of chip space / tooth spacing min.
  • 0.5 in particular at least 0.7
  • a lateral tooth angle of ⁇ 90 ° preferably between about 60 ° and about 80 °, particularly preferably between 65 ° and 75 °, in particular 65 °
  • a concave wall shape for example, a part-circular side surface of the saw teeth comes into consideration. In principle, however, are also non-circular, concave wall shapes.
  • 1 is a rectilinear saw blade, which can be used for example for a stitch or saber saw, in side view,
  • FIG. 2 is a view along section line II-II of Fig. 1,
  • Fig. 3 shows another embodiment of a rectilinear saw blade.
  • a saw blade 1 is shown, which can be used for a straight-line, oscillating sawgehubterrorism especially in sting or saber saws.
  • the working blade 1 has a straight blade carrier 2, which is provided on a tooth side with a plurality of saw teeth 3.
  • the blade carrier 2 is divided into a base portion 4 and a support portion 5, which are integrally formed, wherein the support portion 5 between the base support 4 and the saw teeth 3 is located.
  • the support section 5 and the saw teeth 3 are in particular formed in one piece.
  • the blade carrier 2 extends between a chucking end 6, over which the saw blade is clamped in the saw, and the saw blade tip 7.
  • the base portion 4 of the sheet carrier 2 has parallel side walls and has the thickness d G ; the saw blade 1 has the smallest thickness in the region of the base section 4. The largest thickness is achieved in the area of the saw teeth 3, which are executed either restricted or non-restricted. In the area of the free end face, the saw teeth 3 have their largest thickness d z .
  • the transition between the base portion 4 and the saw teeth 3 is made via the support portion 5, which is concave and has a variable thickness.
  • the circular shape extends into the side surface of the saw teeth 3, so that the transition between the base portion 4 and saw teeth 3 is continuous. Viewed over the height, the side surfaces of the saw teeth 3 can be part-circular in shape up to the free end face.
  • an embodiment is also possible in which only a partial section of the side surface of the saw teeth 3, which adjoins the support section 5 directly, is formed with the same concave or part-circular geometry as the support section 5.
  • close to the concave or part-circular portion of the side surface of the saw teeth 3 further sections of the side surface up to the front sides of the saw teeth, which are preferably planar in itself and connect either tangentially to the concave or part-circular sections or each other run parallel.
  • the total height of the saw blade 1 is composed of the height h G of the base section 4, the height h T of the support section 5 and the height h z of the saw teeth 3.
  • the height h G of the base section 4 is at least 50% of the total height.
  • the height h K which is composed of the height h T of the support section 5 and the height h z of the saw teeth 3, amounts to at least approximately one third of the total height of the saw blade.
  • the thickness d G of the base section 4 is less than the thickness of the support section 5 in the transition to the saw teeth 3 and the saw teeth in the region of their free end side due to the concave extension.
  • ßigen execution is provided that based on the thickness d G of the base portion 4, the saw teeth 3 at the widest point, ie in the region of its free end face, a greater by at least 20% thickness d z have.
  • the thickness of the support section 5 in the transition to the saw teeth 3 exceeds the thickness d G of the base section 4 by a few percent, for example 3% or 5%.
  • a straight trained saw blade 1 is shown, which can be used for a straight, oscillating sawgehubterrorism, for example, in stab or Saber saws.
  • the blade carrier 2 is provided over its entire height with parallel side walls, it thus has a constant thickness d G.
  • the saw teeth 3 are designed to be limited and have the maximum thickness d z in the region of the tooth tip, which is preferably at least 20% greater than the thickness d G of the sheet carrier 2, but not more than 45% or 50%, preferably not more than 35%, in particular between 17%. and 33% greater than d G.
  • the side surfaces of the saw teeth 3 are preferably subjected to grinding of the saw teeth of a grinding, whereby the side surfaces have an at least approximately concave wall shape, which is illustrated by the dotted line with the radius R as an ideal wall shape. Compared to this ideal line with the radius R, the actual side surface deviates slightly even after grinding; in a middle
  • the line 8 forms a parting line, wherein the saw teeth on the sheet carrier. 2 facing side are not reground and only in the area between the dividing line 8 and the sawtooth tips have been subjected to regrinding.
  • the area of the saw teeth 3 subjected to grinding is at least twice as high as the area of the saw teeth between the parting line 8 and the sheet carrier 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Sawing (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Harvester Elements (AREA)

Abstract

L'invention concerne une lame de scie qui présente des dents de scie le long d'un côté denté d'un support de lame (2). Selon l'invention, les dents (3) sont incurvées en alternance vers la droite et la gauche et au moins une face latérale des dents est affûtée de manière à présenter approximativement une surface de paroi concave.
PCT/EP2012/052736 2011-05-06 2012-02-17 Lame de scie WO2012152458A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP12705110.0A EP2704866A1 (fr) 2011-05-06 2012-02-17 Lame de scie
CN201280022050.9A CN103517779A (zh) 2011-05-06 2012-02-17 锯片
KR1020137029292A KR20140021000A (ko) 2011-05-06 2012-02-17 톱 블레이드

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE102011075402.4 2011-05-06
DE102011075402 2011-05-06
DE102012200448 2012-01-13
DE102012200448.3 2012-01-13
DE102012201364A DE102012201364A1 (de) 2011-05-06 2012-01-31 Sägeblatt
DE102012201364.4 2012-01-31

Publications (1)

Publication Number Publication Date
WO2012152458A1 true WO2012152458A1 (fr) 2012-11-15

Family

ID=47019762

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/052736 WO2012152458A1 (fr) 2011-05-06 2012-02-17 Lame de scie

Country Status (5)

Country Link
EP (1) EP2704866A1 (fr)
KR (1) KR20140021000A (fr)
CN (1) CN103517779A (fr)
DE (1) DE102012201364A1 (fr)
WO (1) WO2012152458A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9522432B2 (en) 2012-06-01 2016-12-20 Herbert W. Staub Cradle cutter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10363619B2 (en) * 2015-11-02 2019-07-30 Black & Decker Inc. Reciprocating saw blade

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR997201A (fr) * 1945-06-13 1952-01-03 Les Fils De Peugeot Freres Perfectionnements aux lames de scie
US3111970A (en) * 1961-05-26 1963-11-26 Priest Emmy Lou Tapered sabre saw blade
DE3433279A1 (de) * 1984-09-11 1986-03-20 Gebrüder Honsberg GmbH Sonderwerkzeugmaschinen u. Sägenfabrik, 5630 Remscheid Saegeblatt
EP0910942A2 (fr) * 1997-10-17 1999-04-28 Sandvik Aktiebolag Scie à élaguer
DE20002593U1 (de) 1999-02-15 2000-08-17 Boehler Ybbstal Band Ges M B H Vormaterial für Sägebänder oder Sägeblätter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR474617A (fr) * 1913-12-12 1915-03-02 Des Anciens Etablissements Panhard Et Levassor Appareil à rectifier la denture des lames de scies à ruban
GB631550A (en) * 1946-10-23 1949-11-04 Sandvikens Jernverks Ab Improvements in or relating to the production of cutting teeth of saws
EP0845319A1 (fr) * 1995-03-08 1998-06-03 Amada Company Limited Lame de scie
CN2310656Y (zh) * 1997-07-23 1999-03-17 郭建华 自带适张度带锯条
CN2396915Y (zh) * 1999-10-22 2000-09-20 王正良 一种新型锯条

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR997201A (fr) * 1945-06-13 1952-01-03 Les Fils De Peugeot Freres Perfectionnements aux lames de scie
US3111970A (en) * 1961-05-26 1963-11-26 Priest Emmy Lou Tapered sabre saw blade
DE3433279A1 (de) * 1984-09-11 1986-03-20 Gebrüder Honsberg GmbH Sonderwerkzeugmaschinen u. Sägenfabrik, 5630 Remscheid Saegeblatt
EP0910942A2 (fr) * 1997-10-17 1999-04-28 Sandvik Aktiebolag Scie à élaguer
DE20002593U1 (de) 1999-02-15 2000-08-17 Boehler Ybbstal Band Ges M B H Vormaterial für Sägebänder oder Sägeblätter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2704866A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9522432B2 (en) 2012-06-01 2016-12-20 Herbert W. Staub Cradle cutter

Also Published As

Publication number Publication date
DE102012201364A1 (de) 2012-11-08
EP2704866A1 (fr) 2014-03-12
KR20140021000A (ko) 2014-02-19
CN103517779A (zh) 2014-01-15

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