CA2386366A1 - Circular saw blade straightening machine - Google Patents
Circular saw blade straightening machine Download PDFInfo
- Publication number
- CA2386366A1 CA2386366A1 CA002386366A CA2386366A CA2386366A1 CA 2386366 A1 CA2386366 A1 CA 2386366A1 CA 002386366 A CA002386366 A CA 002386366A CA 2386366 A CA2386366 A CA 2386366A CA 2386366 A1 CA2386366 A1 CA 2386366A1
- Authority
- CA
- Canada
- Prior art keywords
- saw blade
- straightening
- rollers
- circular saw
- straightening machine
- 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.)
- Abandoned
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sawing (AREA)
- Harvester Elements (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention relates to a circular saw blade straightening machine for eliminating unevenness in circular saw blades, comprising straightening rollers or cylinders placed on both sides of the saw blade for straightening uneven sections of the saw blade, whereby the straightening rollers or cylinders (14, 14', 17, 17') run on parallel axes located next to one anothe r to level unevenness on all different sides of the saw blade (1), said axes being parallel in relation to a radius of the saw blade.
Description
s Circular saw blade straighteaing-machine The invention relates to a circular saw blade straightening machine for eliminating unevennesses in circular saw blades, comprising rollers for straightening uneven sections of the saw blade.
When circular saws are used in woodworking, unevennesses occur on the saw blades; after only a few hours of use, these unevennesses can assume proportions that greatly impair the performance of the circular saw. Circular saw blades therefore have to be straightened at regular intervals, i.e. unevennesses have to be eliminated.
A straightening machine for this purpose is described in EP-B-0 521 824. The saw blade is arranged horizontally in this machine and the straightening rollers operate 1 S by applying pressure from above and below.
The object of the invention is to propose a circular saw blade straightening machine of mechanically simpler and more compact design.
This is achieved according to the invention by a straightening machine of the type mentioned at the outset which is distinguished by the features defined in the Claims.
An embodiment of the invention is described below with the aid of the accompanying drawing, in which:
Fig. 1 is a front view of the saw blade and straightening rollers of an embodiment of the machine, and Fig. 2 is a side view of the arrangement shown in Fig. 1.
In the following description, reference is made to EP-B-0 521 824. Design details known from said patent description are not repeated here.
In the machine shown in part in Fig. 1 and 2, the saw blade is vertical and, in contrast to the state of the art, no pressure rollers are present. Instead, the second pair of straightening rollers 14', 17', for the unevermesses rising above the rear side of the saw blade, are located on the same side of the drive axle 3, next to the first pair of straightening rollers 14, 17, where, in the previously described embodiment, the pair of pressure rollers 28 are located.
The rollers 17, 17' on the rear side are shown in Fig. 1 next to the saw blade, the arrow indicating that they are located on that side of the saw blade which is not visible in Fig. 1.
Accordingly, the axle 3, with the saw blade, is moved linearly between the two positions for the smoothing of the front side and the rear side. This takes place in such a way that first one side, for example the front side, is completely smoothed and then the saw blade is moved and the whole of the rear side is treated.
Alternatively, the saw blade can be treated in such a way that each track is straightened on the front and rear sides before the next track is treated. In this case the saw blade is moved between the two positions for each track.
A commercially available laser instrument 20 is provided fvr measuring purposes.
Before the treatment is started, the laser-reference line 18 is aligned precisely with the axle 3. The laser 20 travels as close as possible to the axial hole 19 in the saw blade 1 and adjusts to deal level. It then travels to the tooth base 21 of the saw blade 1 and establishes whether the tooth base 21 is at the same distance from the laser reference line as the centre of the saw blade.
If the tooth base is outside the set tolerance, the saw blade 1 is not even but dish-shaped, which has to be rectified. This is done first before the elimination of smaller dents in the saw blade with the same pairs of rollers. If the tooth base is located closer to the reference line, the curvature of the saw blade is directed away from the reference line. However, the laser measures this difference as a dent directed towards the reference line. To rectify the dish shape, the saw blade therefore has to be treated, as it were, with the wrong pair of rollers, i.e.
with the right-hand pair of rollers 14', 17', until the mean value of the tooth base 21 falls s within the set tolerance. Conversely, the treatment has to be applied with the left-hand pair of rollers 14, 17 if the tooth base is at a greater distance from the reference line 18 and the saw blade 1 is thus outwardly dish-shaped.
In contrast to the flattening of dents, whole tracks are rolled with a constant pressure in order to rectify the dish shape with the appropriate pair of opposed rollers.
After the dish shape of the saw blade 1 has been rectified or after it has been established that the saw blade is even or within the tolerance, the dents are flattened. For this treatment, dead level relative to the reference line is set at the tooth base; this is in contrast to rectification of the dish shape, where dead level is defined close to the middle of the saw blade 1. The right-hand pair of rollers is used for dents directed outwards, i.e. towards the observer, and the left-hand pair of rollers is used for dents directed inwards.
When circular saws are used in woodworking, unevennesses occur on the saw blades; after only a few hours of use, these unevennesses can assume proportions that greatly impair the performance of the circular saw. Circular saw blades therefore have to be straightened at regular intervals, i.e. unevennesses have to be eliminated.
A straightening machine for this purpose is described in EP-B-0 521 824. The saw blade is arranged horizontally in this machine and the straightening rollers operate 1 S by applying pressure from above and below.
The object of the invention is to propose a circular saw blade straightening machine of mechanically simpler and more compact design.
This is achieved according to the invention by a straightening machine of the type mentioned at the outset which is distinguished by the features defined in the Claims.
An embodiment of the invention is described below with the aid of the accompanying drawing, in which:
Fig. 1 is a front view of the saw blade and straightening rollers of an embodiment of the machine, and Fig. 2 is a side view of the arrangement shown in Fig. 1.
In the following description, reference is made to EP-B-0 521 824. Design details known from said patent description are not repeated here.
In the machine shown in part in Fig. 1 and 2, the saw blade is vertical and, in contrast to the state of the art, no pressure rollers are present. Instead, the second pair of straightening rollers 14', 17', for the unevermesses rising above the rear side of the saw blade, are located on the same side of the drive axle 3, next to the first pair of straightening rollers 14, 17, where, in the previously described embodiment, the pair of pressure rollers 28 are located.
The rollers 17, 17' on the rear side are shown in Fig. 1 next to the saw blade, the arrow indicating that they are located on that side of the saw blade which is not visible in Fig. 1.
Accordingly, the axle 3, with the saw blade, is moved linearly between the two positions for the smoothing of the front side and the rear side. This takes place in such a way that first one side, for example the front side, is completely smoothed and then the saw blade is moved and the whole of the rear side is treated.
Alternatively, the saw blade can be treated in such a way that each track is straightened on the front and rear sides before the next track is treated. In this case the saw blade is moved between the two positions for each track.
A commercially available laser instrument 20 is provided fvr measuring purposes.
Before the treatment is started, the laser-reference line 18 is aligned precisely with the axle 3. The laser 20 travels as close as possible to the axial hole 19 in the saw blade 1 and adjusts to deal level. It then travels to the tooth base 21 of the saw blade 1 and establishes whether the tooth base 21 is at the same distance from the laser reference line as the centre of the saw blade.
If the tooth base is outside the set tolerance, the saw blade 1 is not even but dish-shaped, which has to be rectified. This is done first before the elimination of smaller dents in the saw blade with the same pairs of rollers. If the tooth base is located closer to the reference line, the curvature of the saw blade is directed away from the reference line. However, the laser measures this difference as a dent directed towards the reference line. To rectify the dish shape, the saw blade therefore has to be treated, as it were, with the wrong pair of rollers, i.e.
with the right-hand pair of rollers 14', 17', until the mean value of the tooth base 21 falls s within the set tolerance. Conversely, the treatment has to be applied with the left-hand pair of rollers 14, 17 if the tooth base is at a greater distance from the reference line 18 and the saw blade 1 is thus outwardly dish-shaped.
In contrast to the flattening of dents, whole tracks are rolled with a constant pressure in order to rectify the dish shape with the appropriate pair of opposed rollers.
After the dish shape of the saw blade 1 has been rectified or after it has been established that the saw blade is even or within the tolerance, the dents are flattened. For this treatment, dead level relative to the reference line is set at the tooth base; this is in contrast to rectification of the dish shape, where dead level is defined close to the middle of the saw blade 1. The right-hand pair of rollers is used for dents directed outwards, i.e. towards the observer, and the left-hand pair of rollers is used for dents directed inwards.
Claims (3)
1. Circular saw blade straightening machine for eliminating unevennesses in circular saw blades, comprising rollers for straightening uneven sections of the saw blade, characterized in that straightening rollers (14, 14', 17, 17') for flattening unevennesses directed towards the different sides of the saw blade (1) run on parallel axes (13, 13') located next to one another, said axes being parallel to a radius of the saw blade, and in that the saw blade is moved laterally between two positions in which the corresponding axes are located in a plane defined by the radius and perpendicular to the saw blade.
2. Circular saw blade straightening machine according to Claim 1, characterized in that a laser instrument 20 is provided for measuring the unevennesses.
3. Circular saw blade straightening machine according to Claim 2, characterized in that, to rectify the so-called dish shape of the saw blade (1), the pairs of rollers used to straighten the unevennesses are those which are opposed to the measured unevenness.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH85499 | 1999-05-06 | ||
| CH854/99 | 1999-05-06 | ||
| PCT/CH2000/000250 WO2000067940A1 (en) | 1999-05-06 | 2000-05-05 | Circular saw blade straightening machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2386366A1 true CA2386366A1 (en) | 2000-11-16 |
Family
ID=4196758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002386366A Abandoned CA2386366A1 (en) | 1999-05-06 | 2000-05-05 | Circular saw blade straightening machine |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1210200B1 (en) |
| AT (1) | ATE253999T1 (en) |
| CA (1) | CA2386366A1 (en) |
| DE (1) | DE50004445D1 (en) |
| WO (1) | WO2000067940A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1452258A1 (en) * | 2003-02-28 | 2004-09-01 | Walter Oppliger | Circular saw blade straightening machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE131760T1 (en) * | 1991-07-02 | 1996-01-15 | Walter Oppliger | CIRCULAR SAW BLADE STRAIGHTENING MACHINE |
| FI100777B (en) * | 1995-06-02 | 1998-02-27 | Veisto Rakenne Rautio Oy | Method and apparatus for directing a circular saw blade |
-
2000
- 2000-05-05 DE DE50004445T patent/DE50004445D1/en not_active Expired - Fee Related
- 2000-05-05 EP EP00920314A patent/EP1210200B1/en not_active Expired - Lifetime
- 2000-05-05 WO PCT/CH2000/000250 patent/WO2000067940A1/en active IP Right Grant
- 2000-05-05 CA CA002386366A patent/CA2386366A1/en not_active Abandoned
- 2000-05-05 AT AT00920314T patent/ATE253999T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| ATE253999T1 (en) | 2003-11-15 |
| EP1210200A1 (en) | 2002-06-05 |
| DE50004445D1 (en) | 2003-12-18 |
| WO2000067940A1 (en) | 2000-11-16 |
| EP1210200B1 (en) | 2003-11-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |