WO2018036061A1 - Saw blade - Google Patents

Abstract

A saw blade, comprising a main blade (1); the head portion of the upper end of the main blade has a cutting edge (2); the cutting edge (2) comprises a plurality of cutting edge sections which are configured such that the cutting edge section, through which the rotation axis (3) of the saw blade passes, is the zeroth step of cutting edge section (200), a first step of cutting edge section (201), a second step of cutting edge section (202) … an n-th step of cutting edge section (205) are successively provided on the right side of the zeroth step of cutting edge section (200), and the two portions of the zeroth step of cutting edge section (200) positioned on the left and right sides of the rotation axis (3) are symmetric about the rotation axis (3). The cutting edge of the saw blade is configured to be step-shaped from the middle to the two sides, solving the problem that corner regions of both sides of a straight saw blade may become stuck in the material of a work piece during processing, and solving the problem that, only corner regions contact with a work piece when the rotation direction changes, such that cutting teeth in the corner regions are subjected to much heavier wear than cutting teeth in the middle region due to a non-uniform load on the liner cutting edge. Moreover, recesses between two adjacent steps render swarfs generated during the cutting of a work piece loose and easy to discharge, thereby improving cutting efficiency.

Description

 Saw blade

 [0001] The present invention relates to a tool for a sawing device, and more particularly to a saw blade.

 Background technique

 [0002] The Chinese Patent No. CN104029255A, published on the Japanese Patent Publication No. 2014.09.10, discloses a straight saw blade for use in a swinging power tool for swinging an output shaft around its own axis and for cutting wood. The saw blade includes a main body portion, a cutting edge disposed at one end of the main body portion, and a connecting hole disposed at the main body portion, and the connecting hole cooperates with the output shaft. The linear cutting edge of this straight saw has the following problems during cutting: The corners on both sides may become stuck in the material of the workpiece after machining, and turn in the direction of rotation, only the corner area is in contact with the workpiece, and thus the straight line The cutting edge is subjected to uneven load, which causes the cutting tooth wear in the corner area to be called the middle area to be much more serious. Secondly, the straight saw blade further includes a chip removing portion extending from the chip edge to the main body portion, so that the workpiece is cut and produced. The crumbs are loose and easy to discharge, thereby improving cutting efficiency.

[0003] The Chinese Patent No. CN103764328A, published on the Japanese Patent Publication No. 2014.04.30, discloses a saw blade for a machine tool, in particular for a machine tool, in particular a rotary oscillating saw for a hand tool machine. a blade having a circular arcuate shape or at least a rectangular main shape, the main piece having a curved cutting edge, the curved cutting edge being less curved than an arc having the radius: The radius corresponds to the spacing between the axis of rotation of the saw blade and the cutting edge. The saw blade is provided with a curved cutting edge, which effectively solves the problem that the straight blade is easy to get stuck and wear on both sides of the corner during the cutting process, and furthermore, the "the curved cutting edge has the following radius" The degree of curvature of the arc is small: the radius corresponds to the distance between the axis of rotation of the saw blade and the cutting edge. This also achieves the purpose of chip removal during cutting.

[0004] The present application intends to provide a technical means different from the above-mentioned saw blade for a machine tool, which not only solves the problem that the straight saw blade is in the material of the workpiece which may be stuck in the workpiece when the cutting is performed on both sides of the corner region. The direction of rotation turns to 吋, only the angular area is in contact with the workpiece, so that the linear cutting edge is subjected to uneven load, which causes the cutting tooth wear in the corner area to be called a serious problem in the middle area, and the workpiece can be cut and produced. The looseness of the chips is easy to remove, thereby improving the cutting efficiency.

 technical problem

 [0005] The technical problem to be solved by the present invention is: In order to solve the problem that the straight saw blade is cut in the material of the workpiece when the two corner regions are cut, in the direction of rotation, only the corner region is in contact with the workpiece. Therefore, the linear cutting edge is subjected to uneven load, which causes the cutting tooth wear in the corner region to be called a serious problem in the middle region. The present invention provides a saw blade which can not only solve the above problems, but also can make the workpiece be cut by the cutting shovel. Loose is easy to eliminate, which improves cutting efficiency.

 Problem solution

 Technical solution

 [0006] The technical solution adopted by the present invention to solve the technical problem thereof is: a saw blade including a main piece, the head of the upper end of the main piece has a cutting edge, and the cutting edge includes a plurality of the following forms Cutting edge:

[0007] One cutting edge segment traversed by the rotation axis of the saw blade is a 0th-order cutting edge segment, and the first-order cutting edge segment and the second-order cutting edge are continuously disposed on the right side of the 0th-order cutting edge segment. a segment... an nth-order cutting edge segment, wherein n is a natural number greater than or equal to 1; the left side of the 0th-order cutting edge segment is continuously provided with a -1st-order cutting edge segment, a -2th-order cutting edge segment... An m-th order cutting edge segment, wherein m is a natural number greater than or equal to 1; a height of a lowest point of the 0th-order cutting edge segment is greater than a height of a highest point of the first-order cutting edge segment, the k-th order cutting edge segment The height of the lowest point is greater than the height of the highest point of the k+1th cutting edge segment, where k=l, 2, 3...nl _; the height of the lowest point of the 0th order cutting edge is greater than the -1 The height of the highest point of the cutting edge segment, the height of the lowest point of the ninth-order cutting edge segment is greater than the height of the highest point of the -q-1 step cutting edge segment, where q = 1, 2, 3: .m-1; the junction of any two adjacent cutting edge segments forms a recess on the cutting edge.

 [0008] Preferably, in any two points on the portion of the cutting edge located on the right side of the rotation axis, the height of the left point is greater than or equal to the height of the right point; the cutting edge is located on the rotation axis In any two points on the left part, the height of the right point is greater than or equal to the height of the left point.

 Preferably, the two portions of the 0th-order cutting edge segment located on the left and right sides of the rotation axis are symmetrical about the rotation axis.

 [0010] Preferably, the 0th-order cutting edge segment is a straight line segment or an arc.

[0011] Preferably, the 0th order cutting edge segment is an arc, and the center of the 0th order cutting edge segment is located in the saw The center of rotation of the piece.

 [0012] Preferably, the 0th-order cutting edge segment is an arc, and a center of the 0th-order cutting edge segment is located below a rotation center of the saw blade.

[0013] Preferably, m=n, the k'th cutting edge segment and the -q'th cutting edge segment are symmetric about the axis of rotation, where k'=q'= 1, 2, 3...n.

[0014] Preferably, the k'th cutting edge segment is a straight line segment or an arc.

 [0015] Preferably, the kth-th cutting edge segment is an arc, the 0th-order cutting edge segment is an arc, and a center of the k'th-order cutting edge segment and the 0th-order cutting edge The center of the segment is the same point.

[0016] Preferably, m=n=l, 2, 3, 4, 5, 6, 7, 8, or 9, all of the two end points of the cutting edge are equally spaced in the horizontal direction.

[0017] Specifically, the main piece includes a plurality of cutting teeth, and the tooth tips of the plurality of cutting teeth form the cutting edge.

 [0018] Preferably, the cutting tooth is a positive tooth and its tooth tip is vertically upward.

 [0019] Preferably, the cutting teeth are helical teeth, and the tooth tips of the cutting teeth located on the right side of the rotation axis are skewed to the right, and the tooth tips of the cutting teeth located on the left side of the rotation axis are skewed to the left.

[0020] Preferably, the cutting teeth are helical teeth, the tooth tips of all the cutting teeth are skewed to the right or the tooth tips of all the cutting teeth are skewed to the left.

 [0021] Specifically, the device further includes a fixing portion fixedly connected to the main piece, wherein the fixing portion is provided with a reference hole, the reference hole is a circular hole, and a center of the reference hole is the saw blade a plurality of positioning holes are disposed around the rotating center on the fixing portion, and the plurality of positioning holes are evenly distributed in the circumferential direction.

 [0022] Preferably, the hole wall of the reference hole is provided with a left through groove, a right through groove, an upper through groove and a lower through groove which are recessed in the radial direction, and the left through groove is perpendicular to the rotation axis to the left. a recessed portion, the right through groove is recessed to the right perpendicular to the rotation axis, the upper through groove is recessed upward along the rotation axis, and the lower through groove is recessed downward along the rotation axis.

 [0023] Preferably, the hole wall of the reference hole is provided with four positioning grooves which are recessed in the radial direction, the four positioning grooves are evenly distributed in the axial direction, and the width of the positioning groove is from the bottom of the groove to the notch. Expansion

[0024] One of the four positioning grooves is disposed between the upper through groove and the left through groove, and an angle between the recessed direction of the positioning groove and the rotation axis is 45°. [0025] Preferably, two positioning holes are disposed between the upper through groove and the left through groove, and communicated therebetween through a hole;

 [0026] two positioning holes are disposed between the upper through groove and the right through groove, and communicated therebetween through a hole;

 [0027] two positioning holes are disposed between the lower through groove and the left through groove, and communicated therebetween through a hole;

 [0028] Two positioning holes are disposed between the lower through groove and the right through groove, and communicated therebetween through a hole.

 [0029] Preferably, the fixing portion is further provided with a quick opening, and the quick opening is formed by the following steps: [0030] Sl, under the diameter perpendicular to the rotation axis, the fixing is cut off a portion of the portion between the two tangent lines of the reference hole, the two tangent lines being parallel to the axis of rotation;

[0031] S2, the left tangent line of the two tangent lines and the positioning groove of the lower left side have two upper and lower intersection points

Drawing a line at an angle of 45-60° to the left tangent at the intersection below; cutting the portion of the fixed portion between the straight line and the left tangent below the horizontal diameter of the reference hole;

[0032] S3, the right tangent line of the two tangent lines and the positioning slot of the lower right side have two upper and lower intersection points

Draw a line at an angle of 45 to 60° to the right tangent at the intersection below; cut the portion of the fixed portion between the straight line and the right tangent below the horizontal diameter of the reference hole.

[0033] Preferably, the positioning hole is a rectangular hole, and a vertical bisector of two broad sides of the positioning hole passes through the center of rotation, the hole is a fan ring, and the inner arc of the hole and the outer hole The radius difference of the arc is smaller than the long side of the positioning hole.

 Advantageous effects of the invention

 Beneficial effect

 [0034] The beneficial effects of the present invention are that the cutting edge of the saw blade is arranged in a stepwise manner from the middle to the two sides, which solves the problem that the straight saw blade is in the material which may be stuck in the workpiece when the cutting is in the side corner region. Turning in the direction of rotation, only the angular area is in contact with the workpiece, so that the linear cutting edge is subjected to uneven loading, resulting in the wear of the cutting teeth in the corner area being called a serious problem in the middle area, and the concave between the adjacent two steps. The mouth can make the scraps generated by the cutting of the workpiece loose and easy to remove, thereby improving the cutting efficiency.

Brief description of the drawing DRAWINGS

 [0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

 1 is a schematic structural view of a basic structure of a saw blade of the present invention.

 2 is an enlarged schematic view of a portion A of FIG. 1.

 3 is a schematic structural view of a first embodiment of the saw blade of the present invention.

 4 is an enlarged schematic view of a portion B of FIG. 3.

 5 is a schematic structural view of a second embodiment of the saw blade of the present invention.

 6 is an enlarged schematic view of a portion C in FIG. 5.

 7 is a schematic structural view of a third embodiment of the saw blade of the present invention.

 8 is an enlarged schematic view of a portion D of FIG. 7.

 9 is a schematic structural view of a fourth embodiment of the saw blade of the present invention.

 10 is an enlarged schematic view of a portion E of FIG. 9.

 11 is a schematic structural view of a fifth embodiment of the saw blade of the present invention.

 12 is an enlarged schematic view of a portion F of FIG. 11.

 13 is a schematic structural view of a sixth embodiment of the saw blade of the present invention.

 14 is an enlarged schematic view of a portion G of FIG.

 [0050] In the figure, the main piece, 2, the cutting edge, 3, the axis of rotation, 4, the notch, 5, the cutting teeth, 6, the fixing part, 7, the reference hole, 8, the positioning hole, 91, the left channel , 92, right through slot, 93, upper through slot, 94, lower through slot, 10, positioning slot, 11, hole, 12, quick opening, 200, 0th order cutting edge, 201, first order cutting edge Segment, 202, second-order cutting edge segment, 203, first-order cutting edge segment, 204, second-order cutting edge segment, 205, nth-order cutting edge segment, 206, first-m-th cutting edge segment.

 BEST MODE FOR CARRYING OUT THE INVENTION

 BEST MODE FOR CARRYING OUT THE INVENTION

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting. Rather, the invention is to cover all modifications, modifications and equivalents within the spirit and scope of the appended claims. [0052] In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "previous"","after","left","right","vertical","horizontal","top","bottom","inside","outside","axial","radial","week" The orientation or positional relationship to the "indicative" is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the invention and the simplified description, rather than indicating or implying that the device or component referred to has a specific orientation, The specific orientation and operation are not to be construed as limiting the invention.

 Further, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that the terms "connected" and "connected" are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral, unless otherwise specifically defined and defined. Ground connection; can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be specifically understood by those skilled in the art. Further, in the description of the present invention, "multiple" means two or more unless otherwise stated.

 1 to 2, the present invention provides a saw blade comprising a main piece 1, the head of the upper end of the main piece 1 having a cutting edge 2, the cutting edge 2 comprising a plurality of cuttings arranged in the following form Blade section:

[0055] One cutting edge segment traversed by the rotation axis 3 of the saw blade is the 0th-order cutting edge segment 200, and the first-order cutting edge segment 201 and the second-order cutting edge are continuously disposed on the right side of the 0th-order cutting edge segment 200. a segment...the nth-order cutting edge segment 205, wherein n is a natural number greater than or equal to 1; the left side of the 0th-order cutting edge segment 200 is continuously provided with a -1st-order cutting edge segment 203, a -2th-order cutting edge segment... - m-step cutting edge segment 206, where m is a natural number greater than or equal to 1; the lowest point of the 0th-order cutting edge segment 200 has a height greater than the height of the highest point of the first-order cutting edge segment 201, the k-th order cutting edge segment The height of the lowest point is greater than the height of the highest point of the k+1th cutting edge segment, where k = l, 2, 3...n-1; the height of the lowest point of the 0th order cutting edge segment 200 is greater than the first - The height of the highest point of the first-order cutting edge segment 203, the height of the lowest point of the -q-th cutting edge segment is greater than the height of the highest point of the -q-1th cutting edge segment, where q=l, 2, 3.. .ml; the cutting edge of the 0th order is at the highest point of the entire cutting edge 2, and is located in the middle of the main piece 1, and the height of the cutting edge on both sides is gradually lowered, so that the cutting edge 2 is one The middle height and the low shape on both sides effectively solve the problem that the straight saw blade is cut in the material of the workpiece in the corners of the workpiece, and turns in the direction of rotation, only the corner area is in contact with the workpiece, and thus the straight line The cutting edge 2 is subjected to an uneven load, resulting in the wear of the cutting teeth 5 in the corner area, which is called a serious problem in the middle area. Since the cutting edge segment is arranged in a stepped manner, there is no smooth transition from one cutting edge segment to another cutting edge segment adjacent thereto, and there is a large difference in the height of the joint between the two, so that in any two The joint of the adjacent cutting edge segments forms a notch 4 in the cutting edge 2, and the notch 4 can be used as a chip flute, so that the scraping of the workpiece by the cutting burr is easy to remove, thereby improving the cutting efficiency.

 [0056] Since the height of the two adjacent cutting edge segments at the joint has a large drop, if the height of the joint of the lower-order cutting edge segments is lower than the height of the other portions, it is difficult to encounter in the cutting boring The workpiece causes the cutting edge 2 of this portion to be wasted. Therefore, in any two points on the right side of the cutting axis 2, the height of the left side is greater than or equal to the height of the right side; the cutting edge 2 is located Of any two points on the left side of the axis of rotation 3, the height of the right point is greater than or equal to the height of the left point; thus, the height of the joint between each cutting edge segment and the higher first-order cutting edge is always the highest. Ensure that every part of the cutting edge 2 is utilized.

 Further, the saw blade has the same amplitude of swinging left and right in the work cymbal, so in order to achieve an optimum cutting effect, it is preferable that the two portions of the cutting edge 2 located on the left and right sides of the rotation axis 3 are symmetrical about the rotation axis 3.

 [0058] Based on the above, the specific structure of several saw blades is provided below:

 [0059] Embodiment 1

 [0060] As shown in FIGS. 3 to 4, the left and right widths of the main piece 1 are 32.5 mm, and the main piece 1 includes a plurality of cutting teeth 5, the cutting teeth 5 are spur teeth and its tooth tips are vertically upward, and several cuttings are performed. The tooth tips of the teeth 5 form a cutting edge, the two portions of the 0th-order cutting edge segment 200 on the left and right sides of the rotation axis 3 are symmetric about the rotation axis 3, and the 0th-order cutting edge segment 200 is a straight line segment with a length of 7.2 mm; The left side of the 0th-order cutting edge segment 200 is provided with a first-order cutting edge segment 203 and a second-order cutting edge segment 204, and the right side is provided with a first-order cutting edge segment 201 and a second-order cutting edge segment 202, The first-order cutting edge segment 203, the second-order cutting edge segment 204, the first-order cutting edge segment 201, and the second-order cutting edge segment 02 are straight segments perpendicular to the rotation axis 3, and each length is 6.1. The height difference between the 0th-order cutting edge segment 200 and the first-order cutting edge segment 201 is 1 mm, and the height difference between the first-order cutting edge segment 201 and the second-order cutting edge segment 202 is 0.66 mm.

 Embodiment 2

As shown in FIGS. 5-6, the left and right widths of the main piece 1 are 33.2 mm, the main piece 1 includes a plurality of cutting teeth 5, the cutting teeth 5 are helical teeth, and the tooth tips of all the cutting teeth 5 are skewed to the right. The tooth tips of the plurality of cutting teeth 5 form a cutting edge, and the two portions of the 0th-order cutting edge segment 200 located on the left and right sides of the rotation axis 3 are symmetric about the rotation axis 3, the 0th The step cutting edge segment 200 is a straight line segment having a length of 4.6 mm; the left side of the 0th-order cutting edge segment 200 is provided with a first-order cutting edge segment 203, a second-order cutting edge segment 204, and a third-order cutting edge. On the right side, there are a first-order cutting edge segment 2 01, a second-order cutting edge segment 202 and a third-order cutting edge segment, a first-order cutting edge segment 203, a second-order cutting edge segment 204, and a first The third-order cutting edge segment, the first-order cutting edge segment 201, the second-order cutting edge segment 202, and the third-order cutting edge segment are all straight segments perpendicular to the rotation axis 3, and each length is 4.6 mm; The height difference between the cutting edge segment 200 and the first-order cutting edge segment 201 is 0.8 mm, and the height difference between the first-order cutting edge segment 201 and the second-order cutting edge segment 202 is 0.52 mm, and the second-order cutting edge segment 202 and the The height difference of the third-order cutting edge is 0.36 mm.

Embodiment 3

 As shown in FIGS. 7-8, the left and right widths of the main piece 1 are 32.5 mm, the main piece 1 includes a plurality of cutting teeth 5, and the cutting teeth 5 are helical teeth, and the tooth tips of all the cutting teeth 5 are skewed to the left. The tooth tips of the plurality of cutting teeth 5 form a cutting edge, and the two portions of the 0th-order cutting edge segment 200 on the left and right sides of the rotation axis 3 are symmetric about the rotation axis 3, and the 0th-order cutting edge segment 200 is an arc, the arc The distance between the two end points is 7.2 mm and its center is located at the center of rotation of the saw blade; the left side of the 0th-order cutting edge segment 200 is provided with a -1st-order cutting edge segment 203 and a -2th-order cutting edge segment 204 The right side is provided with a first-order cutting edge segment 201 and a second-order cutting edge segment 202, a first-order cutting edge segment 203, a second-order cutting edge segment 204, a first-order cutting edge segment 201, and a second The step cutting edge segments 202 are all straight segments perpendicular to the axis of rotation 3, each having a length of 6.1 mm; the height difference between the end point of the 0th-order cutting edge segment 200 and the first-order cutting edge segment 201 is 1 mm, the first order The height difference between the cutting edge segment 201 and the second-order cutting edge segment 202 is 0.66 mm.

 [0065] Embodiment 4

9 to 10, the left and right widths of the main piece 1 are 32.5 mm, the main piece 1 includes a plurality of cutting teeth 5, the cutting teeth 5 are helical teeth, and the teeth of the cutting teeth 5 located on the right side of the rotation axis 3 The tip is skewed to the right, the tip of the cutting tooth 5 located on the left side of the rotation axis 3 is skewed to the left, the tip of the plurality of cutting teeth 5 forms a cutting edge, and the 0th order cutting edge segment 200 is located on the left and right sides of the rotation axis 3 The two parts are symmetrical about the axis of rotation 3, and the 0th order cutting edge 2 00 is composed of two straight line segments constituting a top angle of 120°, both of which are 8.26 mm in length, and the 0th order cutting edge segment 200 The left side is provided with a first-order cutting edge segment 203 and a second-order cutting edge segment 204, and the right side is provided with a first-order cutting edge segment 201 and a second-order cutting edge segment 202, a first-order cutting edge segment 203, the second-order cutting edge segment 204, the first-order cutting edge segment 201 and the second-order cutting edge segment 202 are straight segments perpendicular to the rotation axis 3, and each length is 7.02 mm; the first-order cutting edge Segment 201 is parallel to the second-order cutting edge segment 202 and to the axis of rotation 3 An angle of 60°; a difference in height between the right end of the 0th-order cutting edge 200 and the left end of the 1st-order cutting edge 201 is 1 mm, and the right end of the first-order cutting edge 201 and the second-order cutting edge The height difference of the left end of 202 is 0. 66mm°

[0067] Embodiment 5

 11 to 12, the left and right widths of the main piece 1 are 32.5 mm, the main piece 1 includes a plurality of cutting teeth 5, the cutting teeth 5 are spur teeth and its tooth tips are vertically upward, and several cuttings are performed. The tooth tips of the teeth 5 form a cutting edge, and the two portions of the 0th-order cutting edge segment 200 on the left and right sides of the rotation axis 3 are symmetric about the rotation axis 3, and the 0th-order cutting edge segment 200 is an arc, and the ends of the arc point are The distance between the centers is 7.2mm and its center is below the center of rotation of the saw blade. The ratio of the distance from the center of rotation to the midpoint of the arc is the radius of the arc. The ratio of the radius of the arc is 1/1.2. The left side is provided with a first-order cutting edge segment 203 and a second-order cutting edge segment 204, and the right side is provided with a first-order cutting edge segment 201 and a second-order cutting edge segment 202, and a first-order cutting edge segment 203 The second-order cutting edge segment 204, the first-order cutting edge segment 201, and the second-order cutting edge segment 202 are all circular arcs, and the two end points of the first-order cutting edge segment 201 are spaced apart by 6.1 mm in the horizontal direction. The distance between the two end points of the second-order cutting edge segment 202 in the horizontal direction is 6.1 mm; the right of the 0th-order cutting edge segment 200 The height difference between the end point and the left end point of the first-order cutting edge segment 201 is lmm, and the height difference between the right end point of the first-order cutting edge segment 201 and the left end point of the second-order cutting edge segment 202 is 0.66 mm.

 [Embodiment 6]

13 to 14, the left and right widths of the main piece 1 are 32.5 mm, and the main piece 1 includes a plurality of cutting teeth 5, and the tooth tips of the plurality of cutting teeth 5 form a cutting edge to form a 0th-order cutting edge segment. The cutting tooth 5 of 200 is a spur tooth and its tooth tip is vertically upward, and the two parts of the 0th order cutting edge segment 200 on the left and right sides of the rotation axis 3 are symmetrical about the rotation axis 3, and the 0th order cutting edge segment 200 is The arc, the distance between the ends of the arc is 7.2 mm and its center is located at the center of rotation of the saw blade; the left side of the 0th-order cutting edge 200 is provided with the -1st-order cutting edge segment 203 and the first - The second-order cutting edge segment 204, the cutting teeth 5 forming the first-order cutting edge segment 201 and the second-order cutting edge segment 202 are helical teeth and its tooth tips are skewed to the left, and the first-order cutting edge segment is provided on the right side. 201 and the second-order cutting edge segment 202, the cutting teeth 5 forming the first-order cutting edge segment 201 and the second-order cutting edge segment 202 are helical teeth and their tooth tips are skewed to the right, the -1st-order cutting edge segment 203, the second-order cutting edge segment 204, the first-order cutting edge segment 201, and the second-order cutting edge segment 202 are all circular arcs; the centers of all the cutting edge segments are the same point, the first-order cutting Two end segments 201 in the horizontal direction of the pitch is 6.1mm, the cutting edge segment of the second stage 202 of the two endpoints in water The square-direction spacing is 6.1 mm; the height difference between the right end point of the 0th-order cutting edge segment 200 and the left end point of the 1st-order cutting edge segment 201 is 1 mm, and the right end point and the 2nd-order cutting of the 1st-order cutting edge segment 201 The height difference of the left end of the blade segment 202 is 0.66 mm.

 [0071] The saw blade further includes a fixing portion 6 fixedly connected to the main piece 1. The fixing portion 6 is provided with a reference hole 7 which is a circular hole. The center of the reference hole 7 is the rotation center of the saw blade, and the rotation axis 3 passes through the center of rotation, and the specific structure of several fixing portions 6 is provided below in connection with the above embodiments:

 [0072] As shown in FIG. 3 and FIG. 4, the fixing portion 6 is configured such that eight fixing holes 8 are provided around the center of rotation of the fixing portion 6, and eight positioning holes 8 are evenly distributed in the circumferential direction, and the positioning holes 8 are rectangular holes. The vertical bisector of the two wide sides of the positioning hole 8 passes through the center of rotation, and the vertical bisector of the two wide sides of one of the eight positioning holes 8 is at an angle of 30° to the axis of rotation 3;

 [0073] The hole wall of the reference hole 7 is provided with a left through groove 91, a right through groove 92, an upper through groove 93 and a lower through groove 94 which are recessed in the radial direction, and the left through groove 91 is recessed to the left perpendicular to the rotation axis 3. The right through groove 92 is recessed to the right perpendicular to the rotation axis 3, the upper through groove 93 is upwardly recessed along the rotation axis 3, and the lower through groove 94 is recessed downward along the rotation axis 3;

 [0074] The hole wall of the reference hole 7 is provided with four radially-displaced positioning grooves 10, and the four positioning grooves 10 are evenly distributed in the axial direction, and the width of the positioning groove 10 is expanded from the bottom of the groove to the notch, and four positioning One of the slots 10 is disposed between the upper through slot 93 and the left through slot 91, and the recessed direction of the positioning slot 10 is at an angle of 45 to the axis of rotation 3. The fixing portion 6 of such a structure can also be used in the saw blades of the embodiments 3 to 6.

 [0075] As shown in FIG. 5 and FIG. 6 , another structure of the fixing portion 6 is that the fixing portion 6 is provided with eight positioning holes 8 around the center of rotation, and the eight positioning holes 8 are evenly distributed in the circumferential direction, and the positioning holes 8 are rectangular. The vertical bisector of the two wide sides of the positioning hole 8 passes through the center of rotation, and the vertical bisector of the two wide sides of one of the eight positioning holes 8 forms an angle of 30° with the axis of rotation 3;

 [0076] The hole wall of the reference hole 7 is provided with a left through groove 91, a right through groove 92, an upper through groove 93 and a lower through groove 94 which are recessed in the radial direction, and the left through groove 91 is recessed to the left perpendicular to the rotation axis 3. The right through groove 92 is recessed to the right perpendicular to the rotation axis 3, the upper through groove 93 is upwardly recessed along the rotation axis 3, and the lower through groove 94 is recessed downward along the rotation axis 3;

[0077] The two positioning holes 8 between the upper through groove 93 and the left through groove 91 communicate through one of the holes 11, and the two positioning holes 8 between the upper through groove 93 and the right through groove 92 communicate through one hole 11 The two positioning holes 8 between the through groove 94 and the left through groove 91 communicate through one of the holes 11, and the two positioning holes 8 between the lower through groove 94 and the right through groove 92 communicate through a hole 11 which is a fan ring The radius difference between the inner arc and the outer arc of the tunnel 11 is less than The long side of the bit hole 8;

 [0078] The hole wall of the reference hole 7 is provided with four radially recessed positioning grooves 10, and the four positioning grooves 10 are evenly distributed in the axial direction, and the width of the positioning groove 10 is expanded from the bottom of the groove to the notch, and four positions are One of the slots 10 is disposed between the upper through slot 93 and the left through slot 91, and the recessed direction of the positioning slot 10 is at an angle of 45 to the axis of rotation 3. The fixing portion 6 of such a structure can also be used in the saw blades of the embodiments 1, 2, 5 and 6.

 [0079] As shown in FIGS. 7 and 8, another structure of the fixing portion 6 is that the fixing portion 6 is provided with eight positioning holes 8 around the center of rotation, and the eight positioning holes 8 are evenly distributed in the circumferential direction, and the positioning holes 8 are rectangular. The vertical bisector of the two wide sides of the positioning hole 8 passes through the center of rotation, and the vertical bisector of the two wide sides of one of the eight positioning holes 8 forms an angle of 30° with the axis of rotation 3;

 [0080] The hole wall of the reference hole 7 is provided with a left through groove 91, a right through groove 92, an upper through groove 93 and a lower through groove 94 which are recessed in the radial direction, and the left through groove 91 is recessed to the left perpendicular to the rotation axis 3. The right through groove 92 is recessed to the right perpendicular to the rotation axis 3, the upper through groove 93 is upwardly recessed along the rotation axis 3, and the lower through groove 94 is recessed downward along the rotation axis 3;

[0081] The two positioning holes 8 between the upper through groove 93 and the left through groove 91 are communicated through a hole 11 , and the two positioning holes 8 between the upper through groove 93 and the right through groove 92 communicate through a hole 11 , the hole 11 is a fan ring shape, and a difference in radius between the inner arc and the outer arc of the tunnel 11 is smaller than a long side of the positioning hole ₈ ;

 [0082] The hole wall of the reference hole 7 is provided with four radially recessed positioning grooves 10, and the four positioning grooves 10 are evenly distributed in the axial direction, and the width of the positioning groove 10 is expanded from the bottom of the groove to the notch, and four positioning A positioning groove 10 in the groove 10 is disposed between the upper through groove 93 and the left through groove 91, and the recessed direction of the positioning groove 10 is at an angle of 45 with the rotation axis 3. ;

 [0083] The fixing portion 6 is further provided with a quick opening 12, and the quick opening 12 is formed by the following steps:

 [0084] Sl, under the diameter perpendicular to the axis of rotation 3, cut off the portion of the fixed portion 6 between the two tangent lines of the reference hole 7, two tangent lines parallel to the axis of rotation 3;

[0085] S2, the left tangent line of the two tangent lines and the left lower positioning groove 10 have two intersection points of the upper and lower sides, and draw a line at an angle of 50° to the left tangent line through the intersection point below; at the level of the reference hole 7 Below the diameter, the portion where the fixing portion 6 is located between the straight line and the left tangent is cut;

[0086] S3, the right tangent line of the two tangent lines and the right lower positioning groove 10 have two upper and lower intersection points, and a straight line at an angle of 50° to the right tangent line is drawn through the lower intersection point; at the level of the reference hole 7 Below the diameter, the portion where the fixing portion 6 is located between the straight line and the right tangent is cut; [0088] Since the quick opening 12 cuts the two lower positioning holes 8, only six positioning holes 8 remain on the fixing portion. [0088] The fixing portion 6 of such a structure can also be used in the embodiment 1~ 4 in the saw blade.

 [0089] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like is meant to be described in connection with the embodiment or example. Specific features, structures, materials or characteristics are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of a term does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

 [0090] The above-described embodiments of the present invention are intended to be able to make various changes and modifications within the scope of the technical scope of the present invention. The technical scope of the present invention is not limited to the contents of the specification, and the technical scope thereof must be determined in accordance with the scope of the claims.

Claims

Claim  [Claim 1] A saw blade comprising a main piece, characterized in that: the head of the upper end of the main piece has a cutting edge, and the cutting edge comprises a plurality of cutting edge segments arranged in the following form: a cutting edge segment traversed by the rotation axis of the saw blade is a 0th-order cutting edge segment, and a first-order cutting edge segment and a second-order cutting edge segment are continuously disposed on the right side of the 0th-order cutting edge segment. N-step cutting edge segment, where n is a natural number greater than or equal to 1; the left side of the 0th-order cutting edge segment is continuously provided with a first-order cutting edge segment, a second-order cutting edge segment... a -m-th cutting a blade segment, wherein m is a natural number greater than or equal to 1; a height of a lowest point of the 0th-order cutting edge segment is greater than a height of a highest point of the first-order cutting edge segment, and a lowest point of the k-th order cutting edge segment The height is greater than the height of the highest point of the k+1th cutting edge segment, where k = 1, 2, 3...nl _; the lowest point of the 0th order cutting edge is greater than the -1st cutting edge The height of the highest point of the segment, the height of the lowest point of the cutting step of the -qth step is greater than the height of the highest point of the cutting edge segment of the -q-1th step, where q = l, 2, 3...ml; The junction of any two adjacent cutting edge segments forms a notch in the cutting edge.  [Claim 2] The saw blade according to claim 1, wherein: the cutting edge is located at any two points on a portion on the right side of the rotation axis, and the height of the left side is greater than or equal to the right side The height of the point on the left side of the axis of rotation is greater than or equal to the height of the point on the left side.  [Aspect 3] The saw blade according to claim 2, wherein: the two portions of the 0th-order cutting edge segment located on the left and right sides of the rotation axis are symmetrical with respect to the rotation axis.  [Claim 4] The saw blade according to claim 3, wherein the 0th-order cutting edge segment is a straight line segment or an arc.  [Aspect 5] The saw blade according to claim 4, wherein: the 0th-order cutting edge segment is an arc, and a center of the 0th-order cutting edge segment is located at a rotation center of the saw blade .  [Claim 6] The saw blade according to claim 4, wherein: the 0th-order cutting edge segment is an arc, and a center of the 0th-order cutting edge segment is located at a rotation center of the saw blade Below. The saw blade according to any one of claims 2 to 6, wherein: m = n, the k'th cutting edge segment and the -q'th cutting edge segment are symmetric about the rotation axis , where k'=q'=l, 2, 3...n. A saw blade according to claim 7, wherein: said k'th cutting edge segment is a straight line segment or an arc. A saw blade according to claim 8, wherein: said k'th-order cutting edge segment is an arc, said 0th-order cutting edge segment is an arc, and a center of said k'th-order cutting edge segment It is the same point as the center of the 0th-order cutting edge segment. The saw blade according to claim 1, wherein: m = n = 1, 2, 3, 4, 5, 6, 7 8, 8 or 9, the two end points of all the cutting edge segments are equally spaced in the horizontal direction. A saw blade according to claim 1, wherein: said main piece includes a plurality of cutting teeth, and a tooth edge of said plurality of cutting teeth forms said cutting edge. A saw blade according to claim 11, wherein: said cutting tooth is a positive tooth and its tooth tip is vertically upward. The saw blade according to claim 11, wherein: said cutting tooth is a helical tooth, and a tooth tip of a cutting tooth located on a right side of said rotation axis is skewed to the right, and a cutting tooth located on a left side of said rotation axis The tip of the tooth is skewed to the left. A saw blade according to claim 11, wherein: said cutting teeth are helical teeth, the tips of all the cutting teeth are skewed to the right or the tips of all the cutting teeth are skewed to the left. The saw blade according to any one of claims 1 to 14, further comprising a fixing portion fixedly coupled to the main piece, wherein the fixing portion is provided with a reference hole, and the reference hole is a circular hole The center of the reference hole is the center of rotation of the saw blade, and the fixing portion is provided with a plurality of positioning holes around the rotation center, and the plurality of positioning holes are evenly distributed in the circumferential direction. The saw blade according to claim 15, wherein: the hole wall of the reference hole is provided with a left through groove, a right through groove, an upper through groove and a lower through groove which are recessed in the radial direction, and the left through groove Disposed to the left perpendicular to the axis of rotation, the right through groove is recessed to the right perpendicular to the rotation axis, the upper through groove is recessed upward along the rotation axis, and the lower through groove is downward along the rotation axis Depression. The saw blade according to claim 16, wherein: the hole wall of the reference hole is provided with four locating grooves which are recessed in the radial direction, and the four positioning grooves are evenly distributed in the axial direction, and the positioning groove The width of the groove extends from the bottom of the groove to the notch; One of the four positioning grooves is disposed between the upper through groove and the left through groove, and an angle between the recessed direction of the positioning groove and the rotation axis is 45°. [Claim 18] The saw blade according to claim 17, wherein: the two positioning holes are disposed between the upper through groove and the left through groove, and communicated therebetween through a hole;  Two positioning holes are disposed between the upper through groove and the right through groove, and communicated therebetween through a hole;  Two positioning holes are disposed between the lower through groove and the left through groove, and communicated therebetween through a hole;  Two positioning holes are disposed between the lower through groove and the right through groove, and communicate with each other through a hole.  [Claim 19] The saw blade according to claim 18, wherein: the fixing portion is further provided with a quick opening, and the quick opening is formed by the following steps:  51. Under the diameter perpendicular to the rotation axis, cut off a portion of the fixing portion between two tangent lines of the reference hole, the two tangent lines being parallel to the rotation axis; 52. The left tangent line of the two tangent lines and the positioning groove of the lower left side have two intersection points of the upper and lower sides, and a straight line at an angle of 45 to 60° with the left tangent line is drawn through the lower intersection point; Below the horizontal diameter of the hole, the portion between the straight line and the left tangent is cut away;  53. The right tangent line of the two tangent lines and the positioning groove of the lower right side have two upper and lower intersection points, and a straight line at an angle of 45 to 60 degrees with the right tangent line is drawn through the lower intersection point; Below the horizontal diameter of the hole, the portion of the fixed portion between the straight line and the right tangent is cut.  [Claim 20] The saw blade according to claim 19, wherein: the positioning hole is a rectangular hole, and a vertical bisector of two broad sides of the positioning hole passes through the rotation center, the hole For the fan ring shape, the difference between the inner arc of the hole and the outer arc is smaller than the long side of the positioning hole.