WO2000078492A1 - Verfahren zur führung eines endlosen bandsägeblattes - Google Patents
Verfahren zur führung eines endlosen bandsägeblattes Download PDFInfo
- Publication number
- WO2000078492A1 WO2000078492A1 PCT/CH2000/000267 CH0000267W WO0078492A1 WO 2000078492 A1 WO2000078492 A1 WO 2000078492A1 CH 0000267 W CH0000267 W CH 0000267W WO 0078492 A1 WO0078492 A1 WO 0078492A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- saw blade
- band saw
- band
- area
- deflection
- Prior art date
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
- B23D63/00—Dressing the tools of sawing machines or sawing devices for use in cutting any kind of material, e.g. in the manufacture of sawing tools
- B23D63/18—Straightening damaged saw blades; Reconditioning the side surface of saw blades, e.g. by grinding
-
- 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
- B23D55/00—Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts
- B23D55/08—Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts of devices for guiding or feeding strap saw blades
- B23D55/082—Devices for guiding strap saw blades
Definitions
- Device for measuring and adjusting the tension of a band saw blade which is performed according to the method of claims 1 or 2, wherein the device (6) has pressure rollers (10) which can be controlled in a pressure-variable manner as a function of the measurement and are arranged in a straight line are characterized in that the measurement of the Tensioning takes place by means of a measuring station (3), which is arranged in the area in which the band saw blade is guided in the route area (II) with increasing radius.
- control unit (8) is arranged in the straight line course in front of the pressure rollers (10), which measures the straightness of the band saw blade back.
- the device according to claim 3 characterized in that there is a test unit (9) in the straight line course in front of the pressure rollers, which checks the flatness of the band saw blade (1).
- the measuring station (3) comprises a bar (30) arranged transversely to the longitudinal direction, in which a plurality of proximity measuring probes are arranged on a line, by means of which the existing crowning of the band saw blade (1) is transverse its longitudinal direction is measurable.
- band saw machine in which the band saw blade is guided according to the method of claim 1 or 2, wherein the deflection stations (2,2 ') are formed by deflection wheels with at least approximately the same radii and two parallel straight lines (III) are present between the two deflection stations , characterized in that at least for one of the two straight lines (III) both transition areas (II) from the one deflection station
- Route areas (II) are designed with increasing radius (r var ).
- the device (6) having pressure rollers (10) which can be controlled in a pressure-variable manner as a function of the measurement and which are arranged in a straight line, characterized in that that the voltage is measured by means of a measuring station (3) which is arranged in the area in which the band saw blade m
- section area (II) with a clothoid arch shape is formed by two parallel guide cheeks (20), each of which is divided into two partial cheek sections (21, 22), and in that the saw band in this section area between support rollers (25 ) and hold-down rollers (26) which are mounted in the swivel bolsters (27).
- the measuring station (3) is arranged in the direction of travel at least approximately in the vicinity of the center of the route area (II) with a clothoid arc shape.
- Apparatus according to claim 3 characterized in that a control unit (8) which measures the straightness of the band saw blade back is arranged in front of the pressure rollers (10) in the straight line course.
- Apparatus according to claim 3 characterized in that there is a test unit (9) in the straight line in front of the pressure rollers, which checks the flatness of the band saw blade (1).
- the device characterized in that the device comprises a computer (7) which compares the measurement data of the measuring station (3) and / or the control unit (8) and / or the test unit (9) with target values and that control means are present, which control the printing rollers (10) according to the computer.
- the measuring station (3) comprises a bar (30) arranged transversely to the longitudinal direction, in which a plurality of proximity measuring probes are arranged on a line, by means of which the existing crowning of the band saw blade (1) is transverse its longitudinal direction is measurable.
- the present invention relates to a method for guiding an endless band saw blade around two deflection stations arranged at a distance from one another, in which the band saw blade is guided with a constant radius and at least one straight line arranged between them.
- the invention also relates to a device for measuring and adjusting the tension of a band saw blade, in which the latter is guided according to the method. Furthermore, the invention comprises a band saw machine in which the band saw blade is also guided according to the method of claim 1.
- band saw blades should cut material when possible. This means that the band saw blades should be absolutely flat in their straight route between the two deflection stations. Furthermore, a band saw blade in the deflection stations should be guided in the same location as possible. The band saw blade is only in the guide area of the deflection stations curved in the direction of the course of the deflection stations, ie practically running on a semicircle, the rollers, rollers or deflection wheels would have to be practically cylindrical. On a cylindrical surface, however, the band saw blade would have insufficient guidance and would run. Accordingly, these pulleys, rollers or wheels have been given slightly curved surfaces.
- the band saw blades must therefore run completely flat on the straight sections, while they should have a convex shape in the curve of the deflection station. This is achieved by pressing a tension into the so-called body of the band saw blade by means of pressure rollers, which leads to the band adopting a curved shape in the curved region.
- the shape of a clothoid arch has proven to be a particularly suitable form of a route area with increasing radius.
- Figure 1 is a perspective view of a
- Figure 2 shows a simplified representation of a device for measuring and tensioning a band saw blade
- FIG. 3 is a purely schematic representation of a
- the method according to the invention can be explained most clearly with reference to FIG. 3.
- the band saw blade itself is designated by the reference number 1.
- Two deflection stations 2 are shown at a distance from one another. In the case of a band saw machine, the deflection stations 2 are formed by corresponding wheels. In other applications, for example in the use of a device for
- the deflection station can also be formed by a plurality of rollers or rollers, which also define an at least approximately circular path.
- FIG. 3 which symbolically represents the arrangement of a band saw machine, is designed such that the conventional guidance of a band saw blade can be seen in the right half on side A, while the guide according to the invention of the band saw blade is shown in the left half B of the figure.
- Section I represents the area in which the band saw blade runs around the deflection wheel of the deflection station 2. In this area, the course circle is arc-shaped, ie the radius in this area is constant. This area is followed by a second area II according to the invention, in which the band saw blade is on a curve continuously increasing radius R var . In this section, the band saw blade preferably runs in the form of a clothoid arch. Ultimately, there remains a section III in which the band saw blade runs completely straight.
- the straight line through this section III does not form the common tangent to the curves with a constant radius or to the two wheels of the deflection stations 2, but is offset parallel to it.
- This distance of the parallel offset is often called the offset and is referred to as E in most mathematical formulas.
- E the offset and is referred to as E in most mathematical formulas.
- the exact design of a clothoid arch does not need to be discussed in this context, since this is dealt with extensively in the mathematical literature and is freely available to everyone. Accordingly, the derivation of the corresponding integral is also dispensed with.
- line 40 represents the level of the table of the band saw machine. The free usable space for carrying out the material to be sawn is thus not impaired by the saw band being guided according to the invention.
- the band saw band guide section II shown here is shaped into a clothoid arch. It consists of two parallel guides pleasant 20, which are each divided into two partial cheek sections 21 and 22 for manufacturing reasons. The distance between the two cheek sections can be adjusted according to the width of the band saw blades. The corresponding adjustment mechanisms are designated by 23. In the area of the first partial cheek section 21, the clothoid arch is provided with only a very slight curvature. Only the second partial cheek section 22 has a greater curvature, and at the end 24 the curvature of the web practically merges into the radius of the deflection station.
- the band saw blade can be guided in the area of both cheeks on the one hand on support rollers 25 and on the other hand can be guided from above via hold-down rollers 26.
- two hold-down rollers 26 are each mounted in a swivel bolster 27, which allows a certain tilting movement about an axis 28. This ensures that the band saw blade can be guided in the form of a clothoid arch with practically no external influence.
- the measuring station 3 by means of which the tension-related curvature of the band saw blade in the curved course area can be determined, is realized, as can be seen in FIG. 1, by a bar 30 which is arranged in the transition area from the partial cheek 21 to the partial cheek 22.
- a multiplicity of measuring probes 31 are arranged in a line in this bar 30.
- the measuring probes can be, for example, optical proximity measuring probes.
- the measuring bar 30 with a large number of measuring probes 31 allows a direct detection of the band over the entire width instead of the linear detection by means of a single probe. This saves time and also allows faster correction at the point where this is required.
- FIG. 2 shows the example of a device for measuring and adjusting the tension of a band saw blade as claimed in claim 3.
- the band saw blade 1 is guided over two deflection stations 2 and 2 '.
- the diameter of the deflection station 2 ' is designed here in the region with a constant radius with a radius r', while the radius of the deflection station 2 has the radius r.
- the deflection station 2 is arranged displaceably by means of clamping means 4.
- the deflection station 2 ' is fixed.
- the deflection station 2 is shown here as a deflection wheel, while the deflection station 2 'is formed by a multiplicity of deflection rollers.
- This transition region 5 is followed by a device 6 with pressure-variable pressure rollers 10, the contact pressure of which can be controlled as a function of the measurement.
- the device 6 receives the corresponding control commands from the computer 7.
- the measurement data of the measurement probes 31 are also supplied to the computer 7.
- the computer creates a curve from the measuring points, which is compared with a target curve.
- This target curve which can be input into the computer 7 or which is already present in the computer and can be called up accordingly, is compared with the actual conditions and this results in the control commands for the device 6.
- a control unit 8 serves to ensure the straightness of the
- the control unit 8 also supplies the measurement data to the computer 7 and these measurement data are also evaluated and are used to control the device 6.
- a test unit 9 which detects deviations from the flatness of the band saw blade. This flatness, which in turn can be determined using measuring probes or scanning rollers, is forwarded to the computer 7 and is again used to control the device 6 with the pressure rollers.
- the device 6 can be completely conventional. These can be, for example, two rollers arranged in alignment one above the other, the pressure of which can be varied relative to one another.
- the offset E represents the difference in the diameters of the deflection stations 2 and 2 '.
- the band saw blade is less stressed overall. This leads to enormous advantages in that a particularly quiet run can be achieved and a discontinuity jump in the band saw blade is largely avoided, from which it can be concluded that cracks in the band saw blade can be largely avoided. Accordingly, the lifespan of a band saw blade can also be increased by operating the band saw blade in a band saw machine according to the procedure.
- the clothoid arch is a relatively complicated geometric curve. In reality, of course, one can only approximate this. In practice, of course, any assy ptotically approximating curve from the circular shape to a straight line distant from it is conceivable.
- the use of cloth arch is still known today, especially in road and rail construction. Due to the clothoid curve, the centrifugal forces at the transition from the constant circular arc to the straight line are considerably reduced.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sawing (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
Abstract
Description
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE50001806T DE50001806D1 (de) | 1999-06-18 | 2000-05-15 | Verfahren zur führung eines endlosen bandsägeblattes |
AT00922404T ATE237423T1 (de) | 1999-06-18 | 2000-05-15 | Verfahren zur führung eines endlosen bandsägeblattes |
AU42833/00A AU4283300A (en) | 1999-06-18 | 2000-05-15 | Method for guiding an endless band-saw blade |
JP2001504537A JP4578748B2 (ja) | 1999-06-18 | 2000-05-15 | 無限帯のこブレード誘導方法、帯のこブレードのテンションの測定および設定を行う装置、および無限帯のこブレード誘導方法を実施する装置 |
EP00922404A EP1187697B1 (de) | 1999-06-18 | 2000-05-15 | Verfahren zur führung eines endlosen bandsägeblattes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1138/99 | 1999-06-18 | ||
CH113899 | 1999-06-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000078492A1 true WO2000078492A1 (de) | 2000-12-28 |
Family
ID=4203384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH2000/000267 WO2000078492A1 (de) | 1999-06-18 | 2000-05-15 | Verfahren zur führung eines endlosen bandsägeblattes |
Country Status (7)
Country | Link |
---|---|
US (1) | US6745644B1 (de) |
EP (1) | EP1187697B1 (de) |
JP (1) | JP4578748B2 (de) |
AT (1) | ATE237423T1 (de) |
AU (1) | AU4283300A (de) |
DE (1) | DE50001806D1 (de) |
WO (1) | WO2000078492A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103496016A (zh) * | 2013-09-27 | 2014-01-08 | 宿迁隆森木业有限公司 | 木工锯带整平机 |
DE102015122262A1 (de) * | 2015-12-18 | 2017-06-22 | Georg Kesel Gmbh & Co. Kg | Vorrichtung und Verfahren zum Transport von Sägebändern unter der Berücksichtigung der Wechselkrümme |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070245877A1 (en) * | 2006-04-25 | 2007-10-25 | Pollard Levi A | Band saw apparatus |
US7645093B1 (en) | 2008-07-09 | 2010-01-12 | Tetra Technologies, Inc. | Articulating band saw and method |
US8475081B2 (en) | 2008-07-09 | 2013-07-02 | Tetra Technologies, Inc. | Articulating band saw and method |
US10376972B2 (en) | 2017-02-22 | 2019-08-13 | Bark Delivered Inc. | Porous bearing for a band saw, a band saw and a method of operating a band saw |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1237060A (fr) * | 1959-10-07 | 1960-07-22 | Nouvelle scie à ruban | |
SU738874A1 (ru) * | 1978-03-31 | 1980-06-05 | Центральный Научно-Исследовательский Институт Механической Обработки Двересины | Ленточнопильный станок |
DE3313160C1 (de) * | 1983-04-12 | 1984-07-12 | Hermann 5264 Gipf-Oberfrick Aargau Hinden | Vorrichtung zum Beseitigen von Längs- und Rückendeformationen an Sägeblättern für Bandsägen |
DE4214784A1 (de) * | 1991-05-02 | 1992-11-19 | Rudolf Alber Gmbh & Co Kg | Richtmaschine fuer bandsaegeblaetter und verfahren zum richten von bandsaegeblaettern |
US5488884A (en) * | 1994-04-07 | 1996-02-06 | Armstrong Manufacturing Company | Method and apparatus for side-grinding saw blade teeth |
EP0820829A1 (de) * | 1996-07-22 | 1998-01-28 | Walter Oppliger | Verbesserte Bandsägeblatt-Spannmaschine |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US932987A (en) * | 1908-12-08 | 1909-08-31 | John E Hibbert | Band-saw-moving machine. |
US971841A (en) * | 1910-04-04 | 1910-10-04 | John E Hibbert | Band-saw tensioning and moving machine. |
US3919900A (en) * | 1974-12-09 | 1975-11-18 | Letson & Burpee Ltd | Automatic roll tensioning method and apparatus |
JPH0440817Y2 (de) * | 1985-03-04 | 1992-09-25 | ||
JPH0368729U (de) * | 1989-11-10 | 1991-07-08 | ||
JPH0569223A (ja) * | 1991-01-21 | 1993-03-23 | Amada Co Ltd | 帯鋸盤 |
-
2000
- 2000-05-15 DE DE50001806T patent/DE50001806D1/de not_active Expired - Lifetime
- 2000-05-15 JP JP2001504537A patent/JP4578748B2/ja not_active Expired - Fee Related
- 2000-05-15 US US10/018,915 patent/US6745644B1/en not_active Expired - Lifetime
- 2000-05-15 WO PCT/CH2000/000267 patent/WO2000078492A1/de active IP Right Grant
- 2000-05-15 EP EP00922404A patent/EP1187697B1/de not_active Expired - Lifetime
- 2000-05-15 AU AU42833/00A patent/AU4283300A/en not_active Abandoned
- 2000-05-15 AT AT00922404T patent/ATE237423T1/de not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1237060A (fr) * | 1959-10-07 | 1960-07-22 | Nouvelle scie à ruban | |
SU738874A1 (ru) * | 1978-03-31 | 1980-06-05 | Центральный Научно-Исследовательский Институт Механической Обработки Двересины | Ленточнопильный станок |
DE3313160C1 (de) * | 1983-04-12 | 1984-07-12 | Hermann 5264 Gipf-Oberfrick Aargau Hinden | Vorrichtung zum Beseitigen von Längs- und Rückendeformationen an Sägeblättern für Bandsägen |
DE4214784A1 (de) * | 1991-05-02 | 1992-11-19 | Rudolf Alber Gmbh & Co Kg | Richtmaschine fuer bandsaegeblaetter und verfahren zum richten von bandsaegeblaettern |
US5488884A (en) * | 1994-04-07 | 1996-02-06 | Armstrong Manufacturing Company | Method and apparatus for side-grinding saw blade teeth |
EP0820829A1 (de) * | 1996-07-22 | 1998-01-28 | Walter Oppliger | Verbesserte Bandsägeblatt-Spannmaschine |
Non-Patent Citations (1)
Title |
---|
SOVIET INVENTIONS ILLUSTRATED Section PQ Week 198106, Derwent World Patents Index; Class P63, AN 1981-B1342D, XP002146260 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103496016A (zh) * | 2013-09-27 | 2014-01-08 | 宿迁隆森木业有限公司 | 木工锯带整平机 |
DE102015122262A1 (de) * | 2015-12-18 | 2017-06-22 | Georg Kesel Gmbh & Co. Kg | Vorrichtung und Verfahren zum Transport von Sägebändern unter der Berücksichtigung der Wechselkrümme |
Also Published As
Publication number | Publication date |
---|---|
JP2003502183A (ja) | 2003-01-21 |
US6745644B1 (en) | 2004-06-08 |
AU4283300A (en) | 2001-01-09 |
JP4578748B2 (ja) | 2010-11-10 |
EP1187697A1 (de) | 2002-03-20 |
DE50001806D1 (de) | 2003-05-22 |
EP1187697B1 (de) | 2003-04-16 |
ATE237423T1 (de) | 2003-05-15 |
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