Band-saw blade

Abstract

The invention relates to a band-saw blade (32). The band-saw blade (32) has a tooth (2a) which has a cutting edge (10a) having a main cutting edge portion (18a) and secondary cutting edge portions (19a, 20a) which are arranged on both sides of the main cutting edge portion (18a). The tooth (2a) has a flank (14) which has a main cutting flank (23a) and secondary cutting flanks (24a, 25a) which are arranged on both sides of the main cutting flank. A main cutting edge clearance angle of the main cutting edge flank (23a) is smaller than at least one secondary cutting edge clearance angle of a secondary cutting edge flank (24a, 25a). The lateral extent (33a) of the main cutting edge flank (23a) becomes smaller as the distance from the main cutting edge portion (18a) increases. By means of the design according to the invention, an increase in the feed force caused by wear can be reduced and / or a sawing performance of the band-saw blade (32) can be maintained for an increased service life.

Description

[0001] REHBERG HÜPPE + PARTNER - 1 - Originally submitted version 21019PCT 07.11.2025

[0002] RHP Ref.: 21019PCT / AS7

[0003] Patent application: File number not yet assigned

[0004] Priority 11.11.2024 (DE 10 2024 132 892.4)

[0005] Title: Saw blade

[0006] Applicant: WIKUS-Sägenfabrik Wilhelm H. Kullmann GmbH & Co. KG

[0007] SAW BAND

[0008] TECHNICAL AREA OF INVENTION

[0009] The invention relates to a saw blade which is flexible and bent into an endless band, wherein the saw blade has an endless saw blade back and teeth on the side opposite the band back. The saw blade can be made, for example, of or with metal, of a composite material, and / or with points or teeth made of a carbide insert. The saw blade is used for sawing a workpiece, in particular made of

[0010] metal, a metal alloy,

[0011] Wood,

[0012] Stone,

[0013] Plastic, fiber- or carbon-reinforced plastic, other composites or other materials.

[0014] STATE OF THE ART

[0015] A saw blade with a tooth carrier and a plurality of teeth adjoining the tooth carrier is known from German patent application DE 42 00 423 A1. This saw blade is also known under the applicant's trademark "FUTURA". The teeth are designed as unsharpened, positively conical teeth arranged in groups with varying heights and widths that repeat along the tooth carrier. In each group, the widest and shortest tooth forms a surface tooth, while the other teeth in the group are power teeth. For example, a group with four geometrically different teeth forms seven cutting channel sections. REHBERG HÜPPE + PARTNER - 2 - Originally filed version 21019PCT 07.11.2025

[0016] Another saw blade with a tooth carrier and a plurality of teeth adjoining the tooth carrier is known from German patent application DE 43 00 622 A1. This saw blade is also known under the applicant's trademark "FUTIIRA PLUS". The teeth are designed as unsharpened, positively conical chamfered teeth, forming two groups that are nested and repeated along the tooth carrier. In the first group, the teeth are arranged in a height and width gradient and constitute the high-performance teeth. The teeth of the second group are identical to each other and represent the widest teeth, thus forming the surface teeth. For example, seven cutting channel sections are formed with four geometrically different teeth.

[0017] A saw blade with a tooth carrier and a plurality of teeth adjoining the tooth carrier is also known from German patent application DE 197 39 074 A1. This saw blade is also known under the trademark "SELEKTA" of the applicant. The teeth are arranged in repeating groups along the tooth carrier. Each group has an even number of set teeth that follow directly one another and form the surface teeth. The group also includes an unset tooth with the greatest height of the teeth, which forms the power tooth. The reduced height of the surface teeth is produced by elastic-plastic deformation, in particular by upsetting. Three geometrically different teeth are used to form three cutting channel sections.

[0018] Two geometrically distinct teeth of a saw blade, which are repeated in a plurality of teeth adjoining a tooth carrier, are known in the prior art as pre-cutters and post-cutters. Both types of teeth are unsharpened and symmetrical to the longitudinal center plane of the tooth carrier. The pre-cutter tooth is chamfered and has a greater height than the post-cutter tooth. The post-cutter tooth, on the other hand, is chamfered or unchamfered and has a greater width at the level of its cutting edge than the pre-cutter tooth. Such a tooth geometry of the pre- and post-cutter teeth is also referred to as "triple chip" geometry, since it removes three chips along the width of the kerf. Thus, three kerf sections are formed with two geometrically distinct teeth. REHBERG HÜPPE + PARTNER - 3 - Originally submitted version 21019PCT 07.11.2025

[0019] DE 10 2015 116 747 B3 proposes a saw band in which a comparatively high number of kerf sections are provided during sawing with a relatively small number of geometrically differently shaped teeth per group, by increasing the number of kerf sections ensured by a secondary cutting tooth. For this purpose, a secondary cutting tooth has cutting sections, each of which is centrally covered by a preceding primary or secondary cutting tooth, so that the uncovered portions of the cutting sections can each form two kerf sections. The cutting sections of the conical teeth can have different widths.The subdivision of a cutting section of a pre- or post-incisor by covering it with another tooth can be used for a pre- and a post-incisor to form five cutting channel sections, for a pre-incisor and two post-incisors to form seven cutting channel sections or nine cutting channel sections, etc. It is possible that both teeth with chamfers and teeth without chamfers are used in such a group of teeth.

[0020] Non-conforming circular saw blades are known, for example, from the publications DE 25 16 137 C2, DE 10 2014 205 445 A1, JP 2004 - 351 578 A, JP 2012 - 956 067 A and EP 3 305 450 B1.

[0021] Figures 1 and 2 show schematic diagrams of a saw blade 1, known from the prior art and designed as a saw band 32, in the region of a tooth 2. Figure 1 shows a central longitudinal section through the saw band 32, without the otherwise customary hatching of the cut cross-section. The tooth 2 has an insert 3, preferably made of carbide, which forms a tooth tip 4. The insert 3 is attached to a tooth base 5, which has a projection, in particular by soldering or resistance welding. The tooth base 5 is in turn attached to a tooth support body 6, wherein, preferably as shown, the tooth base 5 and the tooth support body 6 are formed in one piece. The tooth 2 has a tooth face 7 and a tooth back 8.In one end region, the tooth face 7 transitions via the tooth tip 4 into the tooth back 8, while in the other end region, the tooth face 7 transitions via a tooth root 9 into the tooth back of the adjacent tooth. The tooth tip 4 forms a cutting edge 10 that extends in a transverse direction 11, oriented perpendicular to the plane of the drawing according to Fig. 1. The tooth root 9 also extends in the transverse direction 11. When sawing a workpiece, the tooth 2 of the saw band 32 is moved, on the one hand, in a sawing direction 12, which can also be referred to as the longitudinal direction with respect to the saw band 32 or is parallel to it, and, on the other hand, in a feed direction 13 relative to the workpiece. When tooth 2 moves in the sawing direction 12, the cutting edge 10 is moved parallel to the bottom of a generated cutting channel.The feed direction 13 is oriented vertically to the bottom of the cutting channel. Pressing the tooth 2 in the feed direction 13 causes the tooth tip 4 and the cutting edge 10 to move into the bottom of the cutting channel, allowing the cutting edge 10 to produce a chip in the cutting channel during a superimposed movement in the feed direction 13. The tooth back 8 forms a clearance face 14. The clearance face 14 is inclined at a clearance angle 15 in a plane defined by the saw direction 12 and the feed direction 13, or in a plane parallel to it. The tooth face 7 forms a rake face 16. The rake face 16 is inclined at a rake angle 17 relative to a plane defined by the transverse direction 11 and the feed direction 13. In Fig.

[0022] The rake angle is positive, although negative rake angles are also possible. The sawing direction 12 of the saw band is straight, with the feed directions 13 of the different teeth being oriented parallel to each other. The feed direction 13 is the direction in which the at least one tooth engaged with the workpiece is moved perpendicular to the sawing direction 12.

[0023] As shown in Fig. 2, the cutting edge 10 has different straight sections, namely a main cutting section 18 and, in the illustrated case, two secondary cutting sections 19, 20. In the illustrated embodiment, the main cutting section 18 has a cutting angle of 0°, so that it is oriented parallel to the transverse direction 11. The two secondary cutting sections 19, 20 extend in the transverse direction 11 from the end regions of the main cutting section 18 and are at cutting angles 21, 22 relative to the transverse direction in the plane defined by the transverse direction 11 and the feed direction 13.

[0024] The clearance face 8 is inclined. It therefore has a main cutting edge clearance face 23, which adjoins the main cutting edge section 18 opposite to the sawing direction 12, and secondary cutting edge clearance faces 24, 25, which adjoin the secondary cutting edge sections 19, 20 opposite to the sawing direction 12. Lateral flanks 26, 27 adjoin the lateral end regions of the secondary cutting edge sections 19, 20 and the secondary cutting edge clearance faces 24, 25. In this case, the flanks 26, 27 are inclined with equal flank angles 28, 29 relative to the feed direction 13, thus forming a positively conical tooth 2.

[0025] The foregoing terms will also be used below in connection with the embodiment according to the invention. REHBERG HÜPPE + PARTNER - 5 - Originally filed version 21019PCT 07.11.2025

[0026] TASK OF INVENTION

[0027] The invention is based on the objective of proposing a saw band which is improved in particular with regard to wear of the clearance surface and / or cutting performance and / or feed force to be applied and / or sawing force to be applied and / or friction occurring with the workpiece to be sawn and / or stresses acting on the saw band and / or service life.

[0028] SOLUTION

[0029] The object of the invention is achieved according to the invention by the features of independent claim 1. Further preferred embodiments of the invention can be found in the dependent claims.

[0030] DESCRIPTION OF THE INVENTION

[0031] Definitions

[0032] Transverse plane: In this application, a transverse plane is defined as a plane spanned by or parallel to the transverse direction 11 and the feed direction 13.

[0033] Longitudinal plane: In this application, a longitudinal plane is defined as a plane spanned by or parallel to the sawing direction 12 and the feed direction 13.

[0034] Cutting channel: In this application, a cutting channel is understood to be the channel created in the workpiece to be sawn by the saw blade. The cutting channel is created by the removal of chips by the teeth of the saw blade. REHBERG HÜPPE + PARTNER - 6 - Originally submitted version 21019PCT 07.11.2025

[0035] Cutting channel section: In this application, a cutting channel section is understood to be a portion of the cutting channel in which a continuous chip is removed along its width. These are therefore the strip-shaped sections.

[0036] Effective cutting edge section: In this application, an effective cutting edge section is understood to be a section of the cutting edge of the cutting edge of a tooth of the saw band, which is dimensioned and arranged relative to the other teeth of the saw band in such a way that it comes into contact with the workpiece to be sawn during sawing and thus removes chips.

[0037] Ineffective cutting edge section: In this application, an ineffective cutting edge section is understood to be a section of a cutting edge of a tooth of the saw band which, due to its dimensions and arrangement relative to the other teeth, does not come into contact with the workpiece to be sawn during sawing and therefore does not pick up any chips.

[0038] Surface tooth: In this application, a surface tooth is understood to be a tooth of the saw blade that is responsible for the surface finish of the sawn workpiece. A surface tooth is therefore a tooth that defines an outer lateral boundary when the saw blade is projected onto a transverse plane. If the surface tooth is an unset tooth, this means that the surface tooth is the widest tooth. If the surface tooth is a set tooth, this means that the set has been chosen such that the set tooth projects laterally beyond the other teeth when projected onto a transverse plane.

[0039] Power tooth: In this application, a power tooth is understood to be a tooth of the saw blade that, unlike the surface teeth, is essentially responsible for the cutting performance of the saw blade. Such a tooth therefore protrudes, at least in certain parts, in the feed direction of the saw blade compared to other teeth. In the previously described projection into a transverse plane, such a power tooth is thus a tooth that generates chips in an inner region of the cutting channel.

[0040] Positive conical tooth: In this application, a positive conical tooth is understood to be a tooth of the saw band which, in projection into a transverse plane, has a wedge shape that tapers downwards, such that its flanks 26, 27 are arranged at a positive flank angle 28, 29 to the feed direction 13, thus preventing the tooth and therefore the saw band from jamming in the cutting channel.

[0041] Tooth carrier body: In this application, the tooth carrier body refers to the part of the saw blade on which the teeth are mounted. This is often also referred to as the "base body" of the saw blade. However, the term "tooth carrier body" is intended to better express that it is the part of the saw blade that cannot itself be called a tooth, but on which the teeth are mounted. It is important to note that there are differences between the functional and material distinctions between the tooth carrier body and the teeth. Functionally, the tooth begins with its tooth base in the area of ​​the tooth root. This tooth base is often made of the same material as the tooth carrier body and is formed integrally with it. In other words, one part of this material fulfills the function of the tooth carrier body, and another part fulfills the function of the tooth base and thus the tooth itself.The material separation then only occurs further away from the tooth support body in the area of ​​the tooth tip.

[0042] Numbered reference: The reference to the teeth or other features by an additional letter a, b, ... initially serves only to distinguish the teeth or other features from one another and does not necessarily indicate the order in which they are arranged on the saw blade. However, one possibility revealed by this is that the teeth are arranged precisely in this order – with or without intermediate arrangements of further teeth.

[0043] Further description

[0044] The invention is based on the initial finding that during the operation of a saw band 32, the tooth tip 4 and the cutting edge 10 wear down, resulting in the removal of material from the tooth tip 4 and the cutting edge 10 and the formation of a flat wear surface 30-I, 30-II, the normal of which is oriented parallel to the feed direction 13 (see Fig. 1). As the operating time of the saw band 32 increases, the wear surface 30 migrates further into the tooth 2 against the feed direction 13, as symbolized in Fig. 1 by the successively enlarging wear surfaces 30-I, 30-II. The size of the wear surface REHBERG HÜPPE + PARTNER - 8 - Originally filed version 21019PCT 07.11.2025

[0045] 30 corresponds to the product of a transverse extent 33 of the tooth 2 in the area of ​​the wear lines 31-1, 31-11 and an extent of the wear surface in the sawing direction 12. One consequence of the wear is that an original tooth angle, which corresponds to the angle between the tooth face 7 and the tooth back 8 in the area of ​​the cutting edge 10 and which would change without wear according to the calculation rule

[0046] 90° - clearance angle 15 - rake angle 17 results in an increase, since with the wear as cutting edge 10 the transition from the rake surface 16 to the wear surface 30 becomes effective for chip generation, so that with wear the tooth angle

[0047] 90° - rake angle 17.

[0048] The wear-related formation and enlargement of the wear surface 30 results in the following: when the cutting edge 10 is pressed against the bottom of the cutting channel by the feed force in the feed direction 13, which is necessary for the cutting edge 10 to penetrate the bottom of the cutting channel and thus generate the chip, the wear surface 30 is also pressed against the bottom of the cutting channel. Therefore, to maintain a constant feed rate, a first feed force component must be generated to create the desired pressure of the cutting edge 10 against the bottom to generate the chip, and a second feed force component must be generated to press the wear surface 30 against the bottom of the cutting channel. The second feed force component increases with increasing wear and the associated enlargement of the wear surface 30.

[0049] Such an increase in the required feed force during operation of saw band 32 is undesirable. REHBERG HÜPPE + PARTNER - 9 - Originally submitted version 21019PCT 07.11.2025

[0050] Furthermore, the increase in feed force resulting from the enlargement of the wear surface 30 also leads to increased friction, which in turn increases the sawing force oriented in the sawing direction 12 that must be applied by the drive of the saw band 32. This sawing force must also be applied by a holder for the saw tool or by manual holding forces of a user. The increase in friction and sawing force also leads to increased mechanical and thermal stress on the teeth 2 and the saw band 32, which can result in a reduction in the service life of the saw band 32.

[0051] The increased feed and / or sawing forces can also have negative effects on the quality of the resulting saw cut. For example, the increase in forces can lead to lateral displacement of a section of the saw band 32 and / or oscillations of the saw band 32 in the transverse direction 11, which can result in a saw cut with a wavy surface and / or a tilting of the saw cut, which in the worst case can lead to the rejection of the sawn workpiece.

[0052] Another problem associated with the increased required feed force can arise if the saw band 32 is subjected to the feed force by means of rollers both in front of and behind the workpiece in the sawing direction 12. In this case, the saw band runs in a triangular or trapezoidal shape between the rollers when viewed in the transverse direction, with the apex of the triangle or the side opposite the larger base of the trapezoid located in the area of ​​the workpiece, here the bottom of the cutting channel. The wear-related increase in the required feed force then leads, among other things, to the saw band no longer running in a straight line in the area of ​​the cutting channel when viewed in the transverse direction, but exhibiting a convex curvature. This results in the bottom of the cutting channel potentially developing an increasingly concave curvature.This concave curvature of the bottom of the cutting channel can, for example, result in an incomplete saw cut not being produced, but rather material remaining in the edge area of ​​the cutting channel at the end of the sawing process, which can also lead to the rejection of the sawn workpiece.

[0053] To address this finding and / or other requirements, the invention proposes a saw blade comprising a tooth with a clearance face, a rake face, and a cutting edge. The cutting edge has a main cutting edge section and (at least) a secondary cutting edge section. This is presented in the context of REHBERG HÜPPE + PARTNER - 10 - Originally filed version 21019PCT 07.11.2025

[0054] According to the invention, the main cutting edge section is the section of the cutting edge that projects further into the cutting channel than the secondary cutting edge section. The main cutting edge section has a smaller cutting angle than the secondary cutting edge section. The main cutting edge section can have a cutting angle of 0° or any other cutting angle, in both cases where the secondary cutting edge section has a larger cutting angle.

[0055] In the saw band according to the invention, the clearance surface of the tooth has a main cutting edge clearance surface and (at least) a secondary cutting edge clearance surface. The main cutting edge clearance surface extends behind or from the main cutting edge section, while the secondary cutting edge clearance surface extends behind or from the secondary cutting edge section.

[0056] According to the invention, the clearance angle of the main cutting edge clearance surface is smaller than the clearance angle of the secondary cutting edge clearance surface. Here, the clearance angle describes the angle of the main cutting edge clearance surface or the secondary cutting edge clearance surface in a longitudinal plane. According to the invention, the lateral extent of the main cutting edge clearance surface decreases with increasing distance from the main cutting edge section, wherein the main cutting edge clearance surface is preferably trapezoidal and the wider base of the trapezoid forms the main cutting edge section. It is possible that, as a consequence of this design according to the invention, the lateral extent of the secondary cutting edge clearance surface increases with increasing distance from the secondary cutting edge section.

[0057] The reduction of the lateral extent of the main cutting edge clearance area according to the invention, with an increase in the distance from the main cutting edge section, results in a smaller increase in the wear area with the progressive wear during operation of the saw band, which in particular leads to a reduction in the increase in the required feed force, a reduction in the sawing force, an increased service life, an increased cutting performance and / or an improved sawing result.

[0058] According to the invention, several different teeth in the saw blade form at least one group that repeats along a tooth carrier body. Thus, the design according to the invention is used for a saw blade configuration using a so-called group technique (see also the prior art mentioned at the beginning, to which the measures according to the invention are transferred). REHBERG HÜPPE + PARTNER - 11 - Originally filed version 21019PCT 07.11.2025

[0059] Preferably, one tooth of the group is configured as a pre-cutting tooth, in which case this pre-cutting tooth has the greatest main cutting edge height but the smallest main cutting edge width. The pre-cutting tooth can be configured with or without a secondary cutting edge section. At least one tooth of the group can then be configured as a rear-cutting tooth, in which case it has a smaller main cutting edge height but a larger main cutting edge width.

[0060] Preferably, the main cutting edge section of the cutting edge (preferably of the pre-cutting tooth) is continuous, and is preferably straight or has a continuous curvature. It is possible that the main cutting edge section produces a single, continuous chip (and thus not multiple partial chips). Further chips can then be produced by the other teeth of the group. It is also possible that the main cutting edge section has a single effective cutting edge section as defined above.

[0061] In the saw band according to the invention, the teeth of the group (and all teeth of the saw band) do not have a chip divider groove responsible for splitting a generated chip into two partial chips on either side of the chip divider groove. Instead, the chip is split by the fact that the teeth of the group have different geometries. For example, if the pilot tooth has a greater height than at least one secondary tooth, but a smaller width, the pilot tooth covers the secondary tooth centrally, while the secondary tooth protrudes laterally relative to the pilot tooth. This results in a chip with one partial chip in the area of ​​the pilot tooth and two partial chips in the laterally protruding area of ​​the secondary tooth. The use of the group technique thus eliminates the need for a chip divider groove.It is also possible that the division of a chip into several partial chips is achieved through different set angles of the teeth in the group.

[0062] In principle, it is possible within the scope of the invention that the cutting edge has only one secondary cutting edge section, which then also means that only one secondary cutting edge clearance area is present. Preferably, the cutting edge has two secondary cutting edge sections, which are arranged on different lateral sides of the main cutting edge section and connect directly or indirectly to it. The same or different REHBERG HÜPPE + PARTNER - 12 - Originally filed version 21019PCT 07.11.2025

[0063] The cutting angles of the two secondary cutting edge sections are greater than the cutting angle of the main cutting edge section, and / or the main cutting edge section projects further into the cutting channel than the secondary cutting edge sections. In this case, the clearance surface has two secondary cutting edge clearance surfaces, which originate from or are located behind the two secondary cutting edge sections. The secondary cutting edge clearance surfaces are located on opposite lateral sides of the main cutting edge clearance surface.

[0064] It is possible that, in the case of using two secondary cutting edge sections and two associated secondary cutting edge clearance areas, only the secondary cutting edge clearance angle of one secondary cutting edge clearance area is larger than the primary cutting edge clearance angle of the primary cutting edge clearance area, while the secondary cutting edge clearance angle of the other secondary cutting edge clearance area can be arbitrary, e.g., it can correspond to the primary cutting edge clearance angle of the primary cutting edge clearance area. Then, in the area of ​​the first-mentioned secondary cutting edge clearance area, the reduction in the lateral extent of the primary cutting edge clearance area can be utilized.

[0065] An increase in the reduction of the lateral extent of the main cutting edge clearance area, and thus an enhancement of the effects brought about by the invention, can be achieved if the main cutting edge clearance angle of the main cutting edge clearance area is smaller than the (same or different) secondary cutting edge clearance angles of the two secondary cutting edge clearance areas. In this case, a main cutting edge clearance area that tapers on both sides (for example, a trapezoidal, tapered main cutting edge clearance area) can result.

[0066] The main cutting edge clearance angle, on the one hand, and the at least one secondary cutting edge clearance angle, on the other hand, can be arbitrary within the scope of the invention and for the embodiments described above and below, as long as the secondary cutting edge clearance angle is larger than the main cutting edge clearance angle. To give merely one example that does not limit the invention, the main cutting edge clearance angle can be chosen in the range of a) 25° + / - 20° or b) 25° + / - 15° or c) 25° + / - 10° or d) 25° + / - 5° or e) 25° + / - 3° REHBERG HÜPPE + PARTNER - 13 - Originally filed version 21019PCT 07.11.2025. For each of these choices a) to e) of the principal cutting edge clearance angle, or any other choice of the same, the secondary cutting edge clearance angle can be, for example, in the range of a) 0.5° to 5.0° or b) 0.8° to 4.5° or c) 1.0° to 3.0° or d) 1.5° to 2.5° larger than the principal cutting edge clearance angle.

[0067] Preferably, the main cutting edge clearance angle of the main cutting edge clearance surface is at least 2° (preferably at least 5° or 10°) smaller than the secondary cutting edge clearance angle of the secondary cutting edge clearance surface, smaller than the secondary cutting edge clearance angle of one of the two secondary cutting edge clearance surfaces, smaller than the smaller secondary cutting edge clearance angle of the two secondary cutting edge clearance surfaces, or smaller than the same or different secondary cutting edge clearance angles of the two secondary cutting edge clearance surfaces.Alternatively or cumulatively, it is possible that the principal cutting edge clearance angle of the principal cutting edge clearance area is at least 5% (preferably at least 10% or at least 20%) smaller than the secondary cutting edge clearance angle of the secondary cutting edge clearance area, than the secondary cutting edge clearance angle of one of the two secondary cutting edge clearance areas, than the smaller secondary cutting edge clearance angle of the two secondary cutting edge clearance areas, or than the same or different secondary cutting edge clearance angles of the two secondary cutting edge clearance areas.

[0068] In principle, the teeth of the saw blade can be designed in any way. According to one aspect of the invention, at least a portion of the teeth are ground.

[0069] Alternatively or cumulatively, it is possible that at least some of the teeth have a hard metal insert.

[0070] It is also possible that some or all of the teeth are formed and arranged symmetrically to the longitudinal median plane.

[0071] The teeth, or parts thereof, may be set or unrestricted. REHBERG HÜPPE + PARTNER - 14 - Originally submitted version 21019PCT 07.11.2025

[0072] It is possible that at least some of the teeth have positive flank angles, meaning they are positively conical teeth.

[0073] Within the scope of the invention, the main cutting edge clearance angle and the secondary cutting edge clearance angles can be constant, which means that the lateral boundaries of the main cutting edge clearance area can be straight. It is also possible that the main cutting edge clearance angle and / or the secondary cutting edge clearance angles are variable, which then results in curved lateral boundaries of the main cutting edge clearance area.

[0074] It is possible that several secondary incisors are present in the group, exhibiting a decreasing primary cutting edge height and an increasing primary cutting edge width, thus resulting in a successive widening of the cutting channel. In this case, the secondary incisor with the greatest primary cutting edge width can form a surface tooth.

[0075] In one embodiment of the invention, the group of teeth comprises teeth, each of which has a main cutting edge section, two secondary cutting edge sections, a main cutting edge clearance face, and two secondary cutting edge clearance faces. The saw band can then consist exclusively of this group of teeth, a further group of teeth, or additional teeth beyond the group of teeth. It is also possible for the group to consist of teeth as previously described. In this embodiment, the heights of the main cutting edges decrease successively, particularly starting from a pilot cutting tooth, in the opposite direction of sawing, while the widths of the main cutting edges decrease successively when viewed from the corresponding direction. This embodiment also includes an embodiment as shown in the figures in the present patent application.3 to 11, wherein in this case all teeth of the group have cutting angles in the range of 45° + / - 10° or + / - 5°. It is possible that the rake angle of all teeth is in the range of 9° + / - 3° or + / - 2°. Here, the feature of the invention, namely that the main cutting edge clearance angle is smaller than the secondary cutting edge clearance angle(s) and the lateral extent of the main cutting edge clearance surface decreases with increasing distance from the main cutting edge section, is preferably realized in the foremost tooth of the group, namely the pre-cutting tooth, wherein alternatively or cumulatively any one or any number of the subsequent teeth can also be designed accordingly. REHBERG HÜPPE + PARTNER - 15 - Originally filed version 21019PCT 07.11.2025.

[0076] In another embodiment, the group of teeth comprises or consists of teeth in which a tooth leading in the sawing direction is unset. This tooth then has a main cutting edge section, secondary cutting edge sections, a main cutting edge clearance face, and two secondary cutting edge clearance faces. Following this tooth, opposite to the sawing direction, are two teeth set in opposite lateral directions. These teeth each have a main cutting edge section, two secondary cutting edge sections, a main cutting edge clearance face, and two secondary cutting edge clearance faces. Two further teeth following these, opposite to the sawing direction, are also set in opposite lateral directions, preferably to a greater extent than the previously mentioned teeth.The latter teeth each have a main cutting edge section, a single secondary cutting edge section, a main cutting edge clearance face, and a secondary cutting edge clearance face. In this case, the secondary cutting edge sections and secondary cutting edge clearance faces of the two teeth are preferably arranged on opposite sides of the two teeth. This embodiment includes, for example, the embodiment described in Figures 13 to 17. It is possible that the inventive measure, whereby the main cutting edge clearance angle is smaller than at least one secondary cutting edge clearance angle and the lateral extent of the main cutting edge clearance face decreases with increasing distance from the main cutting edge section, is implemented only on the first tooth and / or alternatively or cumulatively on one of the following teeth or any number of the following teeth.Preferably, for the offset teeth, this measure is implemented before the teeth are offset.

[0077] In another embodiment, the group of teeth has or consists of two teeth. In this case, the two teeth can be unbounded. The first tooth can then have a main cutting edge section, two secondary cutting edge sections, a main cutting edge clearance face, and two secondary cutting edge clearance faces, wherein the main cutting edge clearance angle is smaller than at least one secondary cutting edge clearance angle, and the lateral extent of the main cutting edge clearance face decreases with increasing distance from the main cutting edge section. The other tooth has no secondary cutting edge sections or secondary cutting edge clearance faces. Instead, the other tooth has only a main cutting edge section oriented in the transverse direction. This embodiment comprises the embodiment shown below in Figures 18 to 20.The cutting angle can be in the range of 30° + / - 10° or + / - 5° REHBERG HÜPPE + PARTNER - 16 - Originally submitted version 21019PCT 07.11.2025, while a rake angle of the two teeth can be in the range of 10° + / - 2° or + / - 1.

[0078] In another embodiment, the group of teeth has or consists of teeth that are unsharpened. In this case, each tooth has a main cutting edge section and two secondary cutting edge sections, as well as a main cutting edge clearance face and two secondary cutting edge clearance faces. The main cutting edge heights and widths of the teeth are different. The teeth with a greater main cutting edge height have a main cutting edge width that is smaller than the main cutting edge width of at least one tooth with a smaller main cutting edge height. In this embodiment, a tooth with a smaller main cutting edge height is followed, opposite to the sawing direction, by a tooth with a greater main cutting edge height. In other words, in this case, the teeth of the group have alternating and different heights opposite to the sawing direction. This embodiment includes, in particular, an exemplary embodiment as shown in the figures.Figures 21 to 23 illustrate this. In this case, the cutting angles can each be in the range of 45° + / - 5° or + / - 3°, while the rake angle can be in the range of 10° + / - 3° or + / - 2°. For this embodiment, the measure can be implemented on individual, several, or all teeth such that the main cutting edge clearance angle is smaller than the secondary cutting edge clearance angle, and the lateral extent of the main cutting edge clearance face decreases with increasing distance from the main cutting edge section.

[0079] In another embodiment, the group of teeth has or consists of teeth that are uncut. In this case, each tooth has a main cutting edge section, two secondary cutting edge sections, a main cutting edge clearance face, and two secondary cutting edge clearance faces. One pair of teeth is symmetrical, meaning that the main cutting edge sections and main cutting edge clearance faces of these teeth are oriented transversely and arranged centrally in the transverse direction, while the secondary cutting edge clearance faces of these teeth have the same cutting angles. Between this pair of symmetrical teeth is a pair of asymmetrical teeth. In these teeth, the main cutting edge section is arranged eccentrically in the transverse direction.Alternatively or cumulatively, the teeth can have different cutting angles on both sides of the main cutting edge section, with the two teeth of the non-symmetrical pair being mirror-symmetrical to the longitudinal plane. This embodiment particularly includes an embodiment as shown in Figures 24 to 32. In this case, the teeth can have different main cutting edge heights. Preferably, in the pair of symmetrical teeth, the tooth leading in the sawing direction is manufactured with a greater main cutting edge height than the other tooth of the pair, with the non-symmetrical teeth then having the same main cutting edge height, which lies between the main cutting edge heights of the pair of symmetrical teeth.In this embodiment, the pairs of symmetrical and asymmetrical teeth can be followed by another pair of asymmetrical teeth, wherein preferably the main cutting heights of this following pair of teeth are equal and smaller than the main cutting heights of the other teeth.

[0080] Advantageous further developments of the invention result from the patent claims, the description and the drawings.

[0081] The advantages of features and combinations of features mentioned in the description are merely exemplary and can have an effect alternatively or cumulatively, without the advantages necessarily having to be achieved by embodiments according to the invention.

[0082] Regarding the disclosure content—not the scope of protection—of the original application documents and the patent, the following applies: Further features can be derived from the drawings—in particular, the geometries depicted and the relative dimensions of several components to one another, as well as their relative arrangement and functional connection. The combination of features from different embodiments of the invention or from features of different claims is also possible, deviating from the chosen cross-references of the claims, and is hereby encouraged. This also applies to features that are illustrated in separate drawings or mentioned in their description. These features can also be combined with features from different claims.Likewise, features listed in the patent claims may be omitted for further embodiments of the invention, but this does not apply to the independent patent claims of the granted patent.

[0083] The features mentioned in the claims and the description are to be understood, with regard to their number, as meaning that exactly that number or a greater number than the stated number is present, without the need for an explicit use of the adverb "at least" (REHBERG HÜPPE + PARTNER - 18 - Originally filed version 21019PCT 07.11.2025). Thus, for example, when an element is mentioned, this is to be understood as meaning that exactly one element, two elements, or more elements are present. The features listed in the claims may be supplemented by further features or may be the only features that the subject matter of the respective claim possesses.

[0084] The reference numerals contained in the patent claims do not constitute a limitation of the scope of the subject matter protected by the patent claims. They merely serve the purpose of making the patent claims easier to understand.

[0085] BRIEF DESCRIPTION OF THE FIGURES

[0086] The invention will now be further explained and described with reference to preferred embodiments shown in the figures.

[0087] Fig. 1 schematically shows a tooth according to the prior art in a longitudinal section with a sectioning direction in a central longitudinal plane.

[0088] Fig. 2 shows the tooth according to Fig. 1 in a frontal view opposite to the sawing direction.

[0089] Figures 3 to 11 show a first embodiment of a saw band, wherein Figure 3 is a top view opposite the feed direction, Figure 4 is a side view in the transverse direction, Figure 5 is an end view opposite the sawing direction, Figure 6 is a detail VI according to the marking in Figure 3, Figures 7 and 8 are representations essentially corresponding to Figure 6 with wear surfaces increasing with increasing wear, and Figures 9 to 11 are longitudinal sections according to the cutting lines IX-IX, XX, XI-XI shown in Figure 6.

[0090] Fig. 12 shows a diagram with test results for a saw blade according to Figs. 3 to 11 (triangularly marked measuring points) and a corresponding saw blade without the measures according to the invention (squarely marked measuring points), showing the required feed force as a function of the number of saw cuts performed while maintaining the same feed rate. REHBERG HÜPPE + PARTNER - 19 - Originally filed version 21019PCT 07.11.2025

[0091] Figures 13 to 17 show a second embodiment of a saw band, with Figure 13 showing a side view in the transverse direction, Figure 14 a top view against the feed direction, Figure 15 a detail XV according to the marking in Figure 14, Figure 16 a detail XVI according to the marking in Figure 14 and Figure 17 an end view against the saw direction.

[0092] Figures 18 to 20 show a third embodiment of a saw band, with Figure 18 showing a side view in the transverse direction, Figure 19 a top view opposite the feed direction and Figure 20 an end view opposite the sawing direction.

[0093] Figures 21 to 23 show a fourth embodiment of a saw band, with Figure 21 showing a side view in the transverse direction, Figure 22 a top view opposite the feed direction, and Figure 23 an end view opposite the sawing direction.

[0094] Figures 24 to 32 show a fifth embodiment of a saw band, with Figure 24 showing a side view in the transverse direction, Figure 25 showing a top view opposite the feed direction, Figure 26 showing an end view opposite the saw direction, and Figures 28 to 32 showing end views opposite the saw direction for the individual teeth of the saw band.

[0095] Figures 33 to 38 show a sixth embodiment of a saw band, wherein Figure 33 shows a side view in the transverse direction, Figure 34 a top view against the feed direction, Figure 35 a detail XXXV according to the marking in Figure 34, Figure 36 a detail XXXVI according to the marking in Figure 34, Figure 37 a compressed tooth tip in a side view in the transverse direction and Figure 38 an end view against the saw direction.

[0096] Fig. 39 shows a seventh embodiment of a saw blade with a pre-cutting tooth and a post-cutting tooth in an end-face view opposite to the sawing direction. REHBERG HÜPPE + PARTNER - 20 - Originally submitted version 21019PCT 07.11.2025

[0097] FIGURE DESCRIPTION

[0098] In the character descriptions and in the characters themselves, the same reference number is sometimes used for features, components, or design elements, and especially for teeth, that correspond or resemble each other. These can then be distinguished from one another by the additional letter a, b, etc. In this case, the features, components, or design elements can also be referred to without using the additional letter, in which case one of the features, components, or design elements, any number of the features, components, or design elements, or all of them can be meant.

[0099] Different degrees of wear are indicated in the figure description and in the figures by the suffix "-I" or "-II".

[0100] Figures 3 to 11 show a saw band 1, which is configured as a saw band 32. Figures 3 to 5 show only a partial section of the saw band 32 with a group of four different teeth 2a, 2b, 2c, 2d. This group can be repeated along the saw band 32, with these groups being directly adjacent to one another or further teeth or groups being arranged between such groups.

[0101] The teeth 2a, 2b, 2c, 2d have different geometries, in particular different cutting edges 10a, 10b, 10c, 10d with different main cutting edge sections 18, secondary cutting edge sections 19, 20, different cutting angles 21, 22, different main cutting edge clearance surfaces 23 and secondary cutting edge clearance surfaces 24, 25.

[0102] It can be seen in Fig. 5 that the flanks 26, 27 of the teeth 2 have the same flank angles 28, 29 and are aligned with each other in the sawing direction 12.

[0103] Furthermore, as can be seen in Fig. 5, the main cutting edge sections 18 of the teeth 2 have a cutting angle of 0°, while the secondary cutting edge sections 19, 20 of the teeth 2 have the same cutting angles 21, 22, which are greater than 0°. The cutting angles 21, 22 on the different sides have opposite directions.

[0104] Furthermore, it can be seen in Fig. 5 that the main cutting edge widths 37 of the main cutting edge sections 18 of teeth 2a to 2d increase in the order indicated by the letters and against the sawing direction 12, with the increases preferably being of the same amounts. It can also be seen in Fig. 5 that the main cutting edge height 38a (i.e., the extension into any cutting channel) of the main cutting edge section 18a of tooth 2a is greatest, while the main cutting edge heights 38b, 38c, 38d of the main cutting edge sections 18b, 18c, 18d of the following teeth 2b, 2c, 2d then decrease successively by the same amount in the order indicated by the letters and against the sawing direction 12.

[0105] Fig. 6 shows a detail VI of the saw tooth 2a according to Fig. 3. It can be seen here that the lateral extent 33a of the main cutting edge clearance surface 23a decreases with increasing distance from the main cutting edge section 18a, with the decrease being linearly dependent on the distance. The main cutting edge clearance surface 23a is thus trapezoidal in shape with side legs of equal inclinations and lengths, a larger base formed by the main cutting edge section 18a, and a shorter opposite end.

[0106] If wear occurs during operation in accordance with the wear lines 31-1, 31-11 according to Fig. 1, a wear surface 30-I, 30-II is formed, the size of which increases with increasing wear (see Fig. 7 and 8):

[0107] Fig. 7 shows the wear surface 30-I for a wear line 31-1 for tooth 2a, while Fig. 8 shows a wear surface 30-11 for greater wear corresponding to wear line 31-11 for the same tooth 2a. The enlargement of the wear surface 30 is smaller than for prior art embodiments due to the trapezoidal main cutting edge clearance surface 23a.

[0108] Figures 9 to 11 show sectional views of tooth 2a in the sections IX-IX, XX and XI-XI marked in Figure 6. A main cutting edge clearance angle 32a of the main cutting edge clearance surface 23a is smaller than the corresponding secondary cutting edge clearance angles 35a, 36a of the secondary cutting edge clearance surfaces 24a, 25a.

[0109] Figures 5 to 11 show and describe the design features for tooth 2a. The same applies to the other teeth 2b, 2c, and 2d. REHBERG HÜPPE + PARTNER - 22 - Originally submitted version 21019PCT 07.11.2025

[0110] In the saw band 32 according to Figs. 3 to 11, the teeth 2a, 2b, 2c, 2d of a group have different tooth spacings 41a, 41b, 41c, 41d and thus the same or different spacings of the main cutting edge sections 18a, 18b, 18c, 18d.

[0111] For example, saw bands 32 can be manufactured with the following geometries according to the embodiment shown in Figs. 3 to 11:

[0112] The flank angles 28 and 29 can each be 6°. The rake angle 17 of teeth 2 can each be 9°. The main cutting edge clearance angle 34 of the teeth can, for example, be 17° ± 1°, while the secondary cutting edge clearance angles 35 and 36 can, for example, be 19° ± 1°. Regarding the other dimensions, the geometries for different design examples can be found in the following table: REHBERG HÜPPE + PARTNER - 23 - Originally submitted version 21019PCT 07.11.2025

[0113] Fig. 12 shows, with triangular measuring points, the dependence of the feed force 39 on the number of saw cuts 40 with the saw band 32 according to Figs. 3 to 11, as well as the corresponding dependence for a saw band without the reduction according to the invention of the lateral extent 33 of the main cutting edge clearance surface 23 (square measuring points), whereby in both cases the same feed rates were maintained during the sawing process. It can be seen that, according to the invention, a significant reduction in the required feed force 39 results.

[0114] Figures 13 to 17 show a second embodiment of a saw band 32.

[0115] In this embodiment, the repeating group has five teeth 2a to 2e. Here, tooth 2a is unperturbed, while a pair of fundamentally corresponding teeth 2b, 2c are perturbed with a first perturbation 42 in opposite lateral directions, and a second pair of geometrically corresponding teeth 2d, 2e are perturbed with a second perturbation 43 in a lateral direction. The second perturbation 43 is greater than the first perturbation 42.

[0116] In a pair of corresponding teeth, teeth 2b, 2c and 2d, 2e are each mirrored to each other with respect to the longitudinal plane (see Fig. 14).

[0117] As can be seen in Fig. 15, the teeth 2b, 2c each have main cutting edge sections 18, which in this case are arranged off-center to the cutting edge, as well as two secondary cutting edge sections 19, 20, which in this case have different lengths, and each has a main cutting edge clearance face 23 and secondary cutting edge clearance faces 24, 25. It is possible that before the set, the main cutting edge sections 18b, 18c and the adjoining main cutting edge clearance faces 23b, 23c were not inclined relative to the transverse direction 11, but then, as a result of the set, have an angle of inclination relative to the transverse direction 11 in the transverse plane that corresponds to the angle of the set. In this case, the secondary cutting edge sections 19b, 20b and 19c, 20c, as well as the associated secondary cutting edge clearance faces 24bg, 25b and 25bg, respectively, can then be24c, 25c may be inclined differently by a difference angle corresponding to the angle of twist relative to the transverse direction 11 in the transverse plane.

[0118] In contrast, tooth 2d (or tooth 2e) only has a main cutting edge section 18d, 18e and a secondary cutting edge section 19d (or 20e). As a result of the set, REHBERG HÜPPE + PARTNER - 24 - Originally submitted version 21019PCT 07.11.2025, the main cutting edge section 18d, 18e with the associated main cutting edge clearance face 23d, 23e is inclined by the set angle in the transverse plane relative to the transverse direction 11. In this case, as a result of the set, the cutting angle 21d, 22e of the secondary cutting edge sections 19d, 20e and the angle of the associated secondary cutting edge clearance face 24d, 25e in the transverse plane relative to the transverse direction 11 change by the set angle.

[0119] In the illustrated embodiment, the lateral extent 33 of the main cutting edge clearance surfaces 23a, 23b, 23c is reduced because the main cutting edge clearance angle 34a, 34b, 34c is smaller than the secondary cutting edge clearance angles 35a, 35b, 35c and 36a, 36b, 36c. It is possible that the main cutting edge clearance surfaces 23d, 23e have a constant lateral extent 33, but a decreasing lateral extent of the main cutting edge clearance surfaces 23d, 23e is also possible as a result of an increase in the secondary cutting edge clearance angles 35d, 36e compared to the main cutting edge clearance angles 34d, 34e.

[0120] Fig. 17 shows that for teeth 2b to 2e, an effective cutting edge section is only present in the area of ​​the secondary cutting edge sections 19, 20, while parts of the secondary cutting edge sections 19, 20 and the main cutting edge section 18 of these teeth are covered by tooth 2a.

[0121] For the embodiment shown in Figures 13 to 17, the tooth spacing 41a can be 37.7 mm, the tooth spacing 41b 30.75 mm, the tooth spacing 41c 27.44 mm, and the tooth spacing 41d 25.95 mm. In this case, the set angle 42 can be 2.54 mm, while the set angle 43 is 3.2 mm.

[0122] Figures 18 to 20 show a third embodiment of a saw band 32, in which a tooth 2b is designed as a chip divider tooth 44. In this case, the chip divider tooth 44 has no secondary cutting sections or secondary cutting clearance surfaces. Instead, the chip divider tooth 44 has only a main cutting section 18b extending straight across its entire width, to which a main cutting clearance surface 23b adjoins. The main cutting section 18b and the main cutting clearance surface 23b are oriented parallel to the transverse direction 11 in the transverse plane.

[0123] In this embodiment, the symmetrical tooth 2a has a main cutting edge section 18a with secondary cutting edge sections 19a arranged on both sides thereof, REHBERG HÜPPE + PARTNER - 25 - Originally submitted version 21019PCT 07.11.2025

[0124] 20a as well as an adjoining main cutting edge clearance area 23a and secondary cutting edge clearance areas 24a, 25a. In this case, the secondary cutting edge clearance areas 24a, 25a can have larger secondary cutting edge clearance angles 35a, 36a than the main cutting edge clearance angle 34a, resulting in a reduction of the lateral extent 33 of the main cutting edge clearance area 23 with increasing distance from the main cutting edge section 18a.

[0125] For a possible design of the saw band 32 according to Figs. 18 to 20, the rake angles 17a, 17b of the teeth 2a, 2b are each 10°. The flank angles 28, 29 of the teeth 2a, 2b can each be 6°. It is possible that the side surfaces of the teeth, when viewed in the feed direction 13, have a taper angle 45 of 6°. Since the main cutting edge height 38a of tooth 2a is greater than the main cutting edge height 38b of tooth 2b, but the main cutting edge width 37b of tooth 2b is greater than the main cutting edge width 37a, tooth 2b, as shown in Fig. 20, projects beyond the secondary cutting edge sections 19a, 19b in a partial section. This results in the production of a split chip with two chip parts in the uncovered sections of the secondary cutting edge sections 19a, 19b. In this example, the cutting angles 21a, 22a are each 30°. For the illustrated embodiment, the following geometries are possible, for example:

[0126] With regard to further embodiments with a chip divider tooth 44 or several chip divider teeth 44, particular reference is made to the exemplary embodiments in patent DE 10 2015 116 747 B3, to which the inventive design with a lateral taper of the main cutting edge clearance surfaces 23 can also be applied.

[0127] Figures 21 to 23 show a fourth embodiment of a saw band 32. In this case, identical teeth 2b, 2d, 2f form a first subgroup, while teeth 2a, 2c, 2e are different and form a second subgroup. The teeth 2 of the two subgroups are according to REHBERG HÜPPE + PARTNER - 26 - Originally submitted version 21019PCT 07.11.2025

[0128] The sequence of their letters is nested within each other. In this case, all teeth 2a to 2f have principal cutting edge sections 18 and secondary cutting edge sections 19, 20, as well as an associated principal cutting edge clearance surface 23 and secondary cutting edge clearance surfaces 24, 25. Teeth 2b, 2d, 2f have the largest principal cutting edge width 37, but the smallest principal cutting edge height 38. In contrast, the principal cutting edge widths 37 of teeth 2e, 2c, 2a become successively smaller according to the sequence of letters, while the principal cutting edge heights 38 become successively larger in this sequence. Here too, individual, several or all principal cutting edge clearance surfaces 23 can have a lateral extent 33, which becomes smaller with increasing distance from the principal cutting edge section 18, because the principal cutting edge clearance angle 34 is smaller than the secondary cutting edge clearance angles 35, 36.

[0129] Regarding further details that may be used in addition to the features and embodiments described here within the scope of the invention, reference is made to patent DE 41 006 22 C2.

[0130] For a specific embodiment of such a saw band 32 according to Figs. 21 to 23, the geometry can be designed as follows:

[0131] The cutting angles 21, 22 of all secondary cutting edge sections 19, 20 can be 45°. The flank angles can be 6°. The rake angle can be 10°. The other geometric parameters for possible design configurations can be as follows: REHBERG HÜPPE + PARTNER - 27 - Originally submitted version 21019PCT 07.11.2025

[0132] Figures 24 to 32 show a fifth embodiment of a saw band 32. A repeating group has teeth 2a to 2f. The teeth 2a, 2d are each symmetrical to the longitudinal center plane, while the pairs of teeth 2b, 2c and 2e, 2f are corresponding to each other, but not mirror-symmetrical to the longitudinal center plane.

[0133] It can be seen in particular in Fig. 26 that all teeth 2a-2f have main cutting edge sections 18a, 18f with associated main cutting edge clearance surfaces 23a-23f (see grey areas), which can be designed according to the invention, namely to have a reduced lateral extent 33 with increasing distance from the associated main cutting edge section 18.

[0134] Possible geometries 2a-2f can be seen from the dimensions and angles given in Figures 26 to 32. The main cutting edge height 38a of tooth 2a can be 0.09 mm higher than the main cutting edge height 38e, 38f of teeth 2e, 2f. The main cutting edge heights 38b, 38c of teeth 2b, 2c can be 0.06 mm higher than the main cutting edge heights 38e, 38f of teeth 2e, 2f. The main cutting edge height 38d can be 0.03 mm higher than the main cutting edge heights 38e, 38f of teeth 2e, 2f. REHBERG HÜPPE + PARTNER - 28 - Originally submitted version 21019PCT 07.11.2025

[0135] Figures 33 to 38 show a sixth embodiment of a saw band 32. Here, a repeating group has seven teeth 2a to 2g. Teeth 2a and 2d are symmetrical about the longitudinal center plane and have main cutting edge sections 18a and 18d, as well as secondary cutting edge sections 19a and 20a or 19d and 20d, and associated main cutting edge clearance faces 23a and 23d, as well as secondary cutting edge clearance faces 24a and 25a or 24d and 25d. The other teeth 2b, 2c, 2e, 2f, and 2g have only main cutting edge sections 18 without secondary cutting edge sections 19 and 20, so that only one main cutting edge clearance face 23 is present without secondary cutting edge clearance faces 24 and 25. Tooth 2e is unhindered, while the pairs of corresponding teeth 2b, 2e and 2f, 2g are turned to the same extent in opposite directions.Furthermore, all teeth 2a-2g are compressed by different compressions 47 such that, in the region of the tooth tip 4, the original clearance angle 15 is reduced to a compressed clearance angle 48. The compression of the tooth tip 4 also results in a rake angle 17 in the region of the tooth tip 4 being increased to a compressed rake angle 49 (see Fig. 37). The compression 47a of tooth 2a is smaller than the compression 47d of tooth 2d, which in turn is smaller than the compression 47e of tooth 2e, which in turn is smaller than the compressions 47b, 47c, 47f, 47g of teeth 2b, 2c, 2f, 2g.

[0136] Fig. 35 shows a top view of the tooth 2d. The main cutting edge section 18d and the secondary cutting edge sections 19d, 20d, as well as the main cutting edge clearance face 23d and the secondary cutting edge clearance faces 24d, 25d, are visible. The lateral extent 33d of the main cutting edge clearance face 23d decreases with increasing distance from the main cutting edge section 18, with the main cutting edge clearance face 23d having the shape of a trapezoid, the larger base of which is formed by the main cutting edge section 18.

[0137] A corresponding representation for tooth 2a is shown in Fig. 36.

[0138] For the embodiment shown in Figures 33 to 38, the tooth spacing 41a is preferably 12.70 mm, the tooth spacing 41b 12.00 mm, the tooth spacing 41c 10.58 mm, the tooth spacing 41d 9.17 mm, the tooth spacing 41e 8.47 mm, the tooth spacing 41f 9.88 mm, and the tooth spacing 41g 11.27 mm. The uncompressed clearance angle 15 can be 30°, while the compressed clearance angle 48 can be in the range of 20° to 28°. The uncompressed rake angle 17 can be 10°, while the compressed rake angle 49 can then be in the range of 12° to 20°. REHBERG HÜPPE + PARTNER - 29 - Originally submitted version 21019PCT 07.11.2025

[0139] In the embodiments according to FIGS. 3 to 11, 13 to 17, 18 to 20, 21 to 23, 24 to 32, and 33 to 38, the tooth 2a, whose main cutting edge section 18 has the greatest main cutting edge height 38a but a smaller main cutting edge width 37, can form a pre-cutting tooth 50a, while the teeth with the smaller main cutting edge height 38b, 38c, ... but the larger main cutting edge width 37b, 3c, ... can form a post-cutting tooth 51b, 51c, ... For example, in the embodiment according to FIGS. 3 to 11, a surface tooth 52 is formed by the tooth 2d with the greatest main cutting edge width.

[0140] Fig. 39 shows a seventh embodiment of a saw band 32 in which a pre-cutting tooth 50 and a post-cutting tooth 51 alternate. In this case, the flanks 26, 27 of the pre-cutting tooth 50 and the post-cutting tooth 51 are aligned with each other. A configuration according to the invention is also possible for this embodiment in which the lateral extent of the main cutting edge clearance surface decreases with increasing distance from the main cutting edge section 18a.

[0141] It is possible that individual features described for one embodiment may be used for another described embodiment. Further features can be seen in the drawings (for example, whether the teeth are symmetrical or asymmetrical with respect to a longitudinal center plane, whether the teeth are set or unstruck, and / or whether the teeth are upturned or not upturned, and which pairs of teeth symmetrical with respect to the longitudinal center plane are present).

[0142] If specific angles in [°] and dimensions in [mm] are given in the description and / or drawings of the present application, different angles and / or dimensions may also be used. For example, the angles and / or dimensions may deviate by + / - 20%, + / - 10%, + / - 5%, + / - 3%, or + / - 2% from the specified dimensions or angles. Alternatively or cumulatively, an angle may deviate by + / - 5°, + / - 3°, + / - 2°, or + / - 1° from the specified angle.

[0143] Preferably, the main cutting edge clearance surfaces 23, whose lateral extent 33 decreases with increasing distance from the cutting section 18, adjoin the main cutting section 18 directly. REHBERG HÜPPE + PARTNER - 30 - Originally submitted version 21019PCT 07.11.2025

[0144] In the embodiments shown in Figures 18 to 32, the trapezoidal shapes of the main cutting edge clearance surfaces 23 and II are not visible in the top views. However, the main cutting edge clearance surfaces 23 are trapezoidal here as well, and it is quite possible that the lateral extent 33 of the main cutting edge clearance surface 23 becomes smaller to a greater extent than shown with increasing distance from the main cutting edge section 18.

[0145] REHBERG HÜPPE + PARTNER - 31 - Originally submitted version 21019PCT 07.11.2025

[0146] REFERENCE MARK LIST

[0147] 1 saw blade

[0148] 2 teeth

[0149] 3 deployment

[0150] 4 Tooth tip

[0151] 5 Tooth base

[0152] 6 tooth carrier bodies

[0153] 7 Tooth Breast

[0154] 8 tooth backs

[0155] 9 Tooth base

[0156] 10 Cutting edge

[0157] 11 Transverse direction

[0158] 12 Saw direction

[0159] 13 Feed direction

[0160] 14 open space

[0161] 15 free angles

[0162] 16 chip area

[0163] 17 rake angles

[0164] 18 Main cutting section

[0165] 19 Side cutting section

[0166] 20 Side cutting section

[0167] 21 Cutting angles

[0168] 22 Cutting angles

[0169] 23 Main cutting edge free area

[0170] 24 secondary cutting edge free area

[0171] 25 secondary cutting edge free area

[0172] 26th flank

[0173] 27th flank

[0174] 28 flank angles

[0175] 29 flank angles

[0176] 30 Wear area

[0177] 31 Wear line

[0178] 32 Saw blade REHBERG HÜPPE + PARTNER - 32 - Originally submitted version 21019PCT 07.11.2025

[0179] 33 lateral extension

[0180] 34 Main cutting edge clearance angles

[0181] 35 secondary cutting edge clearance angles

[0182] 36 secondary cutting edge clearance angles

[0183] 37 Main cutting width

[0184] 38 Main cutting height

[0185] 39 Feed force

[0186] 40 Number of saw cuts

[0187] 41 tooth spacing

[0188] 42 first restriction

[0189] 43 second restriction

[0190] 44 Chip divider tooth

[0191] 45° taper angle

[0192] 47 Compression

[0193] 48 compressed free angle

[0194] 49 compressed rake angle

[0195] 50 Pre-incisor

[0196] 51 Rear incisor

[0197] 52 Surface tooth

Claims

REHBERG HÜPPE + PARTNER - 33 - Originally submitted version 21019PCT 07.11.2025 PATENT CLAIMS 1. Saw band (32) with a tooth (2) having a) a clearance surface (14), b) a rake surface (16) and c) a cutting edge (10) which is arranged ca) between the clearance surface (14) and the rake surface (16) and cb) a main cutting section (18) and a secondary cutting section (19; 20) having a cutting angle of the main cutting section (18) is smaller than a cutting angle (21; 22) of the secondary cutting section (19; 20), d) having the clearance surface (14) having a main cutting clearance surface (23) and a secondary cutting clearance surface (24; 25), characterized in that e) a main cutting clearance angle (34) of the main cutting clearance surface (23) is smaller than a secondary cutting clearance angle (35; 36) of the secondary cutting clearance surface (24; 25), f) a lateral extent (33) of the main cutting clearance surface (23) becomes smaller with increasing distance from the main cutting section (18), and g) several teeth (2a, 2b, ...) form at least a group that repeats along a tooth carrier body (6), wherein preferably one tooth (2a) of the group is a pre-cutting tooth (50) and at least one tooth (2b, 2c, ...) of the group is formed as a secondary incisor (51).

2. Saw band (32) according to claim 1, wherein the main cutting section of the cutting edge is formed continuously.

3. Saw band (32) according to claim 1 or 2, wherein the teeth of the group do not have a chip divider groove and the chip is divided by the different geometries of the teeth of the group. REHBERG HÜPPE + PARTNER - 34 - Originally submitted version 21019PCT 07.11.2025 4. Saw band (32) according to one of claims 1 to 3, wherein a) the cutting edge (10) has two secondary cutting edge sections (19, 20) arranged on different lateral sides of the main cutting edge section (18) and whose cutting angles (21, 22) are greater than the cutting angle of the main cutting edge section (18), b) the clearance surface (14) has two secondary cutting edge clearance surfaces (24, 25) arranged on different lateral sides of the main cutting edge clearance surface (23).

5. Saw band (32) according to claim 4, wherein the main cutting clearance angle (34) of the main cutting clearance surface (23) is smaller than the secondary cutting clearance angles (35, 36) of the two secondary cutting clearance surfaces (24, 25).

6. Saw band (32) according to claim 5, wherein the secondary cutting edge clearance angles (35, 36) of the two secondary cutting edge clearance surfaces (24, 25) are of equal size.

7. Saw band (32) according to one of the preceding claims, wherein the main cutting clearance angle (34) of the main cutting clearance surface (23) a) is at least 2°, at least 5° or at least 10° or b) is at least 5%, at least 10% or at least 20% smaller than the secondary cutting clearance angle (35; 36) of the secondary cutting clearance surface (24; 25), the secondary cutting clearance angle (35; 36) of one of the two secondary cutting clearance surfaces (24; 25), the smaller secondary cutting clearance angle (35; 36) of the two secondary cutting clearance surfaces (24; 25) or the same or different secondary cutting clearance angles (35, 36) of the two secondary cutting clearance surfaces (24, 25).

8. Saw band (32) according to one of the preceding claims, wherein at least a portion of the teeth (2a, 2b, ...) a) is ground and / or b) has a carbide insert and / or c) is arranged symmetrically to the longitudinal center plane and / or d) is unsharpened and / or REHBERG HÜPPE + PARTNER - 35 - Originally submitted version 21019PCT 07.11.2025 e) is twisted and / or f) is compressed and / or g) has positive flank angles (28, 29).

9. Saw band (32) according to one of the preceding claims, wherein several secondary cutting teeth (51) are present in the group having a decreasing main cutting edge height (38) and increasing main cutting edge width (37), wherein the secondary cutting tooth (51) with the largest main cutting edge width (37) forms a surface tooth (52).

10. Saw band (32) according to one of the preceding claims, wherein the group a) consists of two teeth with different geometries forming three cutting channel sections, or b) consists of three teeth with different geometries forming five cutting channel sections, or c) consists of G teeth with different teeth forming S cutting channel sections, wherein S = 2G - 1.

11. Saw band (32) according to one of the preceding claims, wherein the number of cutting channel sections S is obtained from the equation S = 2G - 1 + 2T, where G is the total number of teeth in the group and T is the number of chip divider teeth in the group.

12. Saw band (32) according to one of the preceding claims, wherein the group of teeth comprises teeth (2a; 2b; 2c; 2d) or consists of teeth (2a; 2b; 2c; 2d) which are unsharpened and each comprise a main cutting section (18a; 18b; 18c; 18d) and two secondary cutting sections (19a, 20a; 19b, 20b; 19c, 20c; 19d, 20d) and a main cutting clearance face (23a; 23b; 23c; 23d) and two secondary cutting clearance faces (24a, 25a; 24b, 25b; 24c, 25c; 24d, 25d), wherein the main cutting heights (38a; 38b; 38c; 38d) the teeth (2a; 2b; 2c; 2d) become successively smaller and the main incisal widths (37a; 37b; 37c; 37d) become successively smaller.

13. Saw band (32) according to one of the preceding claims, wherein the group of teeth comprises teeth (2a; 2b; 2c; 2d; 2e) or consists of teeth (2a; 2b; 2c; 2d; 2e) wherein REHBERG HÜPPE + PARTNER - 36 - Originally submitted version 21019PCT 07.11.2025 a) one tooth (2a) is unperturbed and has a principal cutting edge section (18a) and two secondary cutting edge sections (19a, 20a) as well as a principal cutting edge clearance face (23a) and two secondary cutting edge clearance faces (24a, 25a), b) two following teeth (2b, 2c) are set in opposite lateral directions and each have a principal cutting edge section (18b, 18c) and two secondary cutting edge sections (19b, 20b; 19c, 20c) as well as a principal cutting edge clearance face (23b; 23c) and two secondary cutting edge clearance faces (24b, 25b; 24c; 25c), and c) two following teeth (2d, 2e) in opposite lateral directions directions are twisted and each has a main cutting section (18d, 18e) and only a secondary cutting section (19d; 20e) and a main cutting clearance area (23d; 23e) and only a secondary cutting clearance area (24d, 25e).

14. Saw band (32) according to one of the preceding claims, wherein the group of teeth comprises two teeth (2a; 2b) or consists of two teeth (2a; 2b) wherein a) one tooth (2a) is unsharpened and has a main cutting section (18a) and two secondary cutting sections (19a, 20a) and a main cutting clearance face (23a) and two secondary cutting clearance faces (24a, 25a), and b) the other tooth (2b) is unsharpened and has no secondary cutting sections and no secondary cutting clearance faces (24a, 25a).

15. Saw band (32) according to one of the preceding claims, wherein the group of teeth comprises teeth (2a; 2b; 2c; 2d; 2e; 2f) or consists of teeth (2a; 2b; 2c; 2d; 2e; 2f) a) which are unsharpened and b) which each comprise a main cutting section (18a; 18b; 18c; 18d; 18e; 18f) and two secondary cutting sections (19a, 20a; 19b, 20b; 19c, 20c; 19d, 20d; 19e, 20e; 19f, 20f) and a main cutting clearance face (23a; 23b; 23c; 23d; 23e; 23f) and two secondary cutting clearance faces (24a, 25a; 24b, 25b; 24c, 25c; 24d, 25d; 24e, 25e; 24f, 25f), c) the main cutting edge heights (38a; 38b; 38c; 38d; 38e; 38f) and the main cutting edge widths (37a; 37b; 37c; 37d; 37e; 37f) of the teeth (2a; 2b; 2c; 2d; 2e; 2f) are different, wherein the teeth with a larger main cutting edge height have a main cutting edge width that is smaller than the main cutting edge width of at least one tooth with a smaller main cutting edge height and REHBERG HÜPPE + PARTNER - 37 - Originally submitted version 21019PCT 07.11.2025 d) a tooth with a smaller main cutting edge height is followed, against the direction of sawing, by a tooth with a larger main cutting edge height.

16. Saw band (32) according to one of the preceding claims, wherein the group of teeth comprises teeth (2a; 2b; 2c; 2d; 2e; 2f) or consists of teeth (2a; 2b; 2c; 2d; 2e; 2f) a) which are unsharpened and b) which each comprise a main cutting section (18a; 18b; 18c; 18d; 18e; 18f) and two secondary cutting sections (19a, 20a; 19b, 20b; 19c, 20c; 19d, 20d; 19e, 20e; 19f, 20f) and a main cutting clearance face (23a; 23b; 23c; 23d; 23e; 23f) and two secondary cutting clearance faces (24a, 25a; 24b, 25b; 24c, 25c; 24d, 25d; 24e, 25e; 24f, 25f) exhibit, c) between two symmetrical teeth (2a, 2d) a pair of non-symmetrical teeth (2b, 2c) is arranged in which the main cutting edge section (18b, 18c) and the main cutting edge clearance surface (23b, 23c) are arranged off-center in the transverse direction (11) and / or the cutting angles (21b, 22b; 21c, 22c) are different.

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