JP3088724U - Saw tooth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve both the speed of cutting and facilitating cutting of a saw tooth and increase the life of the tooth. SOLUTION: The saw tooth has a normal center hole,
A regular circular body through which the teeth can be mounted on a rotary drive shaft, and a bonded abrasive grain in the form of a segment disposed around the periphery of the body, the body extending from the periphery toward the hole. At least one groove is provided. Adjacent portions of each groove are not parallel, and adjacent points of those portions are positioned so that each groove faces the direction in which it is to rotate.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a saw tooth, in particular a saw tooth consisting of a regular circular body with a central hole, through which the tooth can be mounted on a rotary drive shaft. Around the periphery of the regular circular body, saw teeth are provided with cutting means in the form of segments of bonded abrasive granules. Further, the tooth is provided with one or more grooves extending from the periphery of the tooth to the central hole. The or each groove is positioned to extend from a portion of a tooth periphery between segments of the abrasive grain.

[0002]

[Prior art]

 Sawtooth teeth are particularly advantageous when dry cutting many building materials, concrete, brick, tarmac (macadam), cinder blocks, paved roads, slabs, granite, stradalit, and the like. It offers higher performance compared to prior art saw teeth, especially improving both the speed and ease of cutting and increasing the life of the saw teeth.

[0003]

[Means for Solving the Problems]

 The first concept of the present invention is to provide a saw tooth having a regular circular body with a regular center hole through which the teeth can be mounted on a rotary drive shaft, and in the form of a segment-shaped adhesive polisher. The granules are arranged around the periphery of the body, the teeth are characterized in that adjacent parts of the grooves are not parallel, and the coincident points of those parts are arranged so that the grooves indicate the direction in which the teeth are going to rotate. And

[0004]

[Embodiment of the present invention]

 Preferably, the tooth comprises a plurality of grooves which can be arranged symmetrically around the tooth. The periphery of the body between adjacent grooves preferably has at least one segment disposed therein. Further, the teeth may be provided with at least one notch, each notch preferably dividing the periphery of the body between adjacent grooves. In a preferred embodiment, a plurality of symmetrically arranged cuts divide the periphery of the body between each adjacent groove.

[0005] The or each notch may be rotationally symmetric with the outermost portion of the or each groove.

[0006] The grooves and cuts may be arranged such that the periphery of the body between the articulating grooves and / or cuts has one or more segments disposed thereon.

[0007] Preferably, the segments are laser welded to the body.

[0008] The body may be made of iron, such as carbon steel.

Preferably, the abrasive grains comprise natural or artificial diamond, tungsten carbide, cubic boron nitride, or the like. The abrasive grains are supported by a matrix of a relatively flexible material such as a metal, alloy, or cured resin.

The segments are trapezoidal, with adjacent trapezoids preferably defining narrow slots therebetween and may have parallel sides. Multiple slots may be defined.

In a preferred embodiment, each groove is peripheral to the body and aligned with the slot to form a continuous path. Also, each notch may be aligned with a slot at the periphery of the body.

The or each notch may have a directional element extending in the direction in which the teeth are to rotate.

The teeth are up to 450 mm in diameter and each segment is radially 15 mm high.

The trapezoidal shape of the segments provides a smooth cutting action similar to continuous rim teeth. In addition, the shape and location of the or each groove serves to improve the flow of cutting from the cutting point and the flow of air to the cutting point, and to reduce the internal stress of the body.

According to another aspect of the present invention, there is provided a method of dry cutting a material, the method comprising rotating a saw tooth as described above and advancing the material. Saw teeth can be used to groove or cut hard materials such as stone, concrete, asphalt, and the like.

[0016]

【Example】

 For a full understanding of the present invention, only one example will be described with reference to the accompanying drawings.

Referring to FIG. 1 in a first embodiment, there is shown a portion of a saw tooth 1 having a conventional circular body 5 around which segments 6 of an adhesive abrasive are mounted. As shown, adjacent segments 6 are separated by slots 7 therebetween. In addition, the body 1 is provided with a groove 8 in the form of an arrowhead, acting at its innermost point in the direction of emission to strengthen the end of the groove and preventing the formation of cracks in the body 1. An enlarged portion 9 is provided.

The grooves 8 indicate the direction in which the teeth 1 are to be rotated, and more importantly, when cutting stones, cement, bricks and the like. The teeth 1 provide more effective cutting features.

The entire teeth are shown in FIG. As shown, the teeth 10 comprise a conventional circular body 11 with a central hole 12 through which the attachment to the rotary drive shaft is effected effectively. Around the edge of the body 11, there are arranged a plurality of trapezoidal segments 16 which are abrasives, which are supported by a matrix of resin, metal, alloy or the like, made of artificial or natural diamond, carbonized. It is composed of tungsten and cubic boron nitride.

The opposing faces of adjacent segments 16 define slots 17 therebetween. The body 16 also includes a plurality of normally radially arranged grooves 18 and a plurality of generally radial cuts 19, each terminating in an enlarged portion 13.

Segment 16 is trapezoidal, with slots 17 defined between opposing faces of adjacent segments having parallel sides. The sides are parallel regardless of tooth diameter. This effectively reduces the size of the gap between adjacent segments 16 compared to that tooth with a non-trapezoidal segment, and reduces the hammer when cutting when compared to that tooth. Indeed, the action of the teeth 10 during cutting is close to that of a continuous rim tooth.

The direction in which the teeth 10 are going to advance is indicated by the arrow A.

The tooth of FIG. 2 has thirty-two segments, eight grooves 18, and eight cuts 19, each of which are equally spaced around the body 11. The teeth 10 have a diameter of 230 mm and each segment 16 is 12 mm high. The size and morphology of the teeth result in very fast cutting characteristics and provide long tooth life. For example, a tooth with thirty-two short segments (as shown in FIG. 2) is 15 times more than a tooth with sixteen long segments (as shown in FIG. 2). % Faster cutting characteristics. In addition, conventional saw teeth have normal 7 mm high segments. The saw tooth 10 of FIG. 2 has a 12 mm high segment, extending the life of the tooth 10 by 50% compared to a tooth with a smaller segment.

The segment 16 is attached to the edge of the body 11, preferably by laser welding. Whether other known methods are used, such as brazing or direct sintering, it will certainly be clear that laser welding is the best way to attach segment 16 to body 11. The segments 16 can be arranged with respect to the body 11 such that their axes intersect, or are not so arranged, i.e. selectively displaced from the plane of the body 11 of the teeth 10 so that one segment is in the plane of the paper. It can be positioned so that it rises and the next segment is zigzag with respect to the plane. Preferably, the segments are arranged such that their axes intersect to reduce side friction as much as possible in use. The axial crossing of the segments means that narrow segments are effective for the desired cut.

In use, the tooth 10 is rotated in the direction indicated by arrow A, and its periphery is first brought into contact with the substrate to be cut. As the teeth rotate at high speed, the fast-moving segment 16 cuts through the substrate due to the force of the abrasive particles provided in the segment 16. The presence of grooves 18 and cuts 19 transport the abraded substrate grains from the cutting location and prevent the abraded grains from plugging the cutting location. Grooves 18 also allow cooling fluid to flow to the cutting location. In the case of dry cutting, the cooling fluid is air.

The shape of the groove 18 provides excellent cutting characteristics to the teeth 11 in stone, brick, concrete and other building materials. Without being limited by any particular theory, the preferred cutting operation results in more effective circulation of the cooling fluid and better transport of the particles from the cutting location than with straight, radial grooves. Changes in the direction of the fluid as it travels along groove 18 may result in additional dispensed fluid.

As the number of segments increases, the rate at which substrates to be cut are removed increases.

FIG. 3 shows a tooth 20 with a larger segment 26 than described above. As mentioned above, there are eight grooves 28 and eight notches 29, the only difference being that they have 16 segments. Thus, each slot or gap 27 between adjacent segments terminates in a groove 28 or cut 29.

FIG. 4 shows a further embodiment, wherein the teeth 30 comprise thirty-two segments 36 and around the periphery of the body 31 as shown in FIG. , Grooves 38 and cuts 39 are only half the number. As shown, there are four segments 36 between the groove 38 and the notch 39 next to it.

FIGS. 5 and 6 show teeth 41 and teeth 51, respectively, which, with one difference, correspond to those described above and to FIGS. 2 and 5, respectively. . Clearly, each notch 49 and 50 is at an angle that they are inclined in the direction in which the teeth 40 and 50 are to rotate. In another example, it is clear that the radial arrangement of the angles can change or switch the fluid flow pattern of the fluid traveling along it to supplement the cutting process. .

Having shown particular embodiments, it should be apparent that any combination of the features set forth in the appended claims is anticipated and indicated within the scope of the present invention. It is easy. For example, the embodiment of FIG. 3 has angled cuts 29, rather than radiating the cuts as shown. Also, there may be different numbers of segments, or the number of segments between grooves may vary.

The flutes are shown and described in the form of arrows, the flutes may be boomerang or banana-shaped, and the shape of the arrowhead is rounded, making the flutes have less angles.

The teeth according to the invention are used in particular for dry cutting of materials, and those teeth may also be suitable for wet cutting, and the use of cutting fluid for cutting is generally prior art.

[Brief description of the drawings]

FIG. 1 is a side view of a portion of a saw tooth according to the present invention.

FIG. 2 is a side view of the saw tooth according to the present invention;

FIG. 3 shows a saw tooth according to a second embodiment of the present invention;

FIG. 4 shows a saw tooth according to a third embodiment of the present invention;

FIG. 5 shows a saw tooth according to a fourth embodiment of the present invention;

FIG. 6 shows a saw tooth according to a fifth embodiment of the present invention;

[Explanation of symbols]

 Reference Signs List 1 tooth / body 5 circular body 6 segment 8 groove 9 enlarged part 10 tooth 11 circular body 12 center hole 13 enlarged part 16 segment 17 slot 18 groove 19 cut 20 tooth 26 segment 27 gap 28 groove 29 cut 30 tooth 31 body 36 segment 38 Groove 39 Cut 40 Teeth 41 Teeth 49 Cut 50 Teeth 51 Teeth 59 Cut

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor da Silva Carrallo Louis Belgium B-6760 Ete-Villeton, Rue de Marronnier, 10 (72) Inventor Erik Yankowski Ef-57300 Mondrange, Rude Doll, 8

Claims (20)

[Utility model registration claims] 1. A regular circular body having a regular center hole through which teeth can be mounted on a rotary drive shaft;
An adhesive abrasive granule in the form of a segment disposed around the periphery of the body, and wherein the body has at least one groove extending from the periphery to the hole, and adjacent portions of the or each groove. Characterized in that they are not parallel, but arrange adjacent points of their parts such that the or each groove points in the direction of rotation. 2. The blade according to claim 1, comprising a plurality of grooves arranged symmetrically across the teeth. 3. The tooth of claim 2, wherein at least one segment is disposed on the periphery of the body between each pair of adjacent grooves. 4. The tooth according to claim 1, comprising at least one notch. 5. The tooth according to claim 4, wherein the or each notch divides the periphery of the body between adjacent grooves. 6. A tooth according to claim 4, wherein a plurality of symmetrically arranged cuts are obtained, each cut dividing the periphery of the body between adjacent grooves. 7. The method according to claim 4, wherein the or each notch is arranged to be rotationally symmetric with the radially outermost part of the or each groove. s teeth. 8. A method according to claim 4, comprising a plurality of cuts, each cut arranged such that one or more segments are located on the periphery of the body between adjacent cuts. A tooth according to any one of the preceding claims. 9. A method according to claim 1, comprising a plurality of grooves, each groove being arranged such that one or more segments are located on the periphery of the body between adjacent grooves. A tooth according to any one of the preceding claims. 10. The tooth according to claim 1, wherein the segments are laser welded to the body. 11. The tooth as claimed in claim 1, wherein the body is made of iron, such as carbon steel. 12. The tooth according to claim 1, wherein the abrasive grains are made of natural or artificial diamond, tungsten carbide, cubic boron nitride or the like. 13. A tooth according to claim 1, wherein the abrasive grains are supported by a matrix of a relatively soft material. 14. The tooth according to claim 13, wherein the relatively soft material is one of a metal, an alloy or a hardened resin. 15. The tooth according to claim 1, wherein the segments are trapezoidal. 16. The tooth of claim 15, wherein adjacent segments form a narrow slot therebetween. 17. The tooth according to claim 16, wherein the narrow slot has parallel sides. 18. The tooth of claim 15 or 16 wherein each groove is aligned with a slot at the periphery of the body to form a continuous path. 19. Each of the notches has a periphery of the body,
18. Aligned with the slot.
A tooth according to any one of the preceding claims. 20. The tooth as claimed in claim 1, wherein the tooth has a diameter of up to 450 mm and each segment has a height in the radial direction of up to 15 mm.