CN216462196U

CN216462196U - Band saw blade

Info

Publication number: CN216462196U
Application number: CN202120699529.2U
Authority: CN
Inventors: 贾寓真; 刘源; 柳寒潇; 刘国跃
Original assignee: Bichamp Cutting Technology Hunan Co Ltd
Current assignee: Bichamp Cutting Technology Hunan Co Ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2022-05-10
Anticipated expiration: 2031-04-07

Abstract

The utility model relates to a band saw blade, which comprises a strap and first sawteeth arranged on the strap, wherein the first sawteeth are provided with a front cutter face and a rear cutter face, and the band saw blade is characterized in that the front cutter face comprises a first sub-front cutter face and a second sub-front cutter face which are sequentially connected, the first sub-front cutter face and the rear cutter face are intersected at the cutting edge of the first sawteeth, the second sub-front cutter face is integrally connected with the strap, and the first sub-front cutter face is arc-shaped. The first sub front cutter surface is arc-shaped, so that sawdust can be better curled during sawing, the sawdust breaking is promoted, the sawdust can be better discharged, and the service life of a band saw blade can be effectively prolonged.

Description

Band saw blade

Technical Field

The utility model belongs to the technical field of saw cutting, and relates to a band saw blade.

Background

The chip breaker is a common design in the cutter, has wide application in the field of blades, and has the main function of promoting the curling of cutting so as to promote chip removal.

The band saw blade is a common cutting tool, and the cutting of the band saw blade is different from turning, planing and the like, so that cutting chips can be discharged only through a narrow gap between the band saw blade and a workpiece during sawing, or the cutting chips are accommodated in a tooth groove until the workpiece is cut out and then discharged. The requirements for chip removal from band saw blades are therefore higher than those for turning, planing, etc. However, when materials such as pure titanium, stainless steel and the like are sawn, chips are long-strip-shaped, a large amount of chips are tangled into lumps during sawing and are difficult to discharge, so that the problems of overlarge cutting force during sawing, saw clamping of a band saw blade and the like are easily caused, and the sawing efficiency and the service life of the band saw blade are greatly reduced.

To address the above-mentioned problems, chip breaker designs have been incorporated into band saw blade products. For example, US6601495B2 (WO 0206020a1, TW 498003B) discloses a band saw blade, the rake face of which has a protruding design, the shape of which is similar to the chip breaker design, but in which the main function is to extend the length of the weld of the bi-metal band saw blade, thereby increasing the fracture resistance of the weld, which design does not have the function of chip breaking. Similarly, US7913601B2 discloses a band saw blade in which the rake face with a tooth in a cycle has a chip breaker-like design, but which assumes only the function of "identification" (or "identifier" in the text) in order to facilitate the manufacturer in distinguishing between different teeth (the saw tooth 120 all the way to the area of the teeth of the saw blade 58 of a saw blade from the other blade of the saw blade) and not the function of chip breaking. Patent US2011/0154970a1 (CN 102123809A) discloses a tooth profile with a chip breaker design, which is characterized in that the radius of a curved surface of the chip breaker is large, so that stress concentration can be effectively reduced, and fracture is reduced. As is well known in the art, the radius of curvature of the chip-breaking surface is too large, the chip-breaking function is weakened, and the rake surface of the patent has a straight line segment (see the position of "13" in fig. 7 in CN 102123809A), which does not take the chip-breaking function, but rather increases the radius of curl of the chip and weakens the chip-breaking function. A tooth form with a chip breaker design is also disclosed in US2013/0149059a1, but like US2011/0154970a1, the rake face also has a straight segment (see the position indicated by "24" in figure 3 of the patent).

In the field of band saw blades, existing chip breaker designs are either not designed for chip breaking (e.g. US6601495B2, US7913601B2, etc.), which do not have a chip breaking function or have a very small chip breaking effect; or a straight line segment (such as US2011/0154970A1, US2013/0149059A1 and the like) is arranged on the rake face, and the straight line segment is equivalent to increase the curling radius of the chip breaker and weaken the chip breaker.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a band saw blade with better chip breaking effect aiming at the defects of the prior art.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the utility model provides a band saw blade, includes the braces and sets up the first sawtooth on the braces, first sawtooth has rake face and back knife face, the rake face is including the first sub-rake face and the sub-rake face of second that connect gradually, first sub-rake face crosses in the blade of first sawtooth with the back knife face, the sub-rake face of second and braces body coupling, first sub-rake face is the arc.

Further, the intersection of the first sub-rake face and the second sub-rake face is recorded as a notch, and from the notch to the cutting edge or from the cutting edge to the notch, an included angle TA between a tangent line of each point of the first sub-rake face and the flank face monotonically increases or monotonically decreases.

Further, the first sub-rake surface is convex in a direction toward the flank surface or convex in a direction away from the flank surface, and preferably, the first sub-rake surface is convex in a direction toward the flank surface.

Further, the first sub-rake face is in one of a circular arc shape, an elliptic arc shape and a parabolic arc shape.

Further, the distance W between the cutting edge and the notch in the length direction of the strap is 0.2-1mm, further 0.4-0.8mm, and further 0.5-0.7 mm; the distance H between the cutting edge and the notch in the width direction of the strap meets the following requirements: h = (1.5-3). times.W.

Further, the included angle TA between the tangent line of the first sub-rake face at the cutting edge and the flank face is 45-55 °, further 47-53 °, further 49-51 °.

Further, an included angle RA between a tangent line of each point of the first sub-rake surface and the width direction of the shoulder strap is 5-15 degrees, further 7-13 degrees, and further 9-11 degrees.

Further, the second sub-rake surface is arc-shaped.

Further, the second sub-rake surface comprises a second sub-rake surface a and a second sub-rake surface B which are sequentially connected, wherein the second sub-rake surface a is linear, and the second sub-rake surface B is arc-shaped; the second sub-front tool face A and the first sub-front tool face are intersected at the notch, and the second sub-front tool face B is integrally connected with the braces.

Furthermore, the braces are provided with a middle tooth, a left tooth and a right tooth; the first saw teeth are middle teeth; or, the first sawtooth is a middle sawtooth, and the right branch tooth and the left branch tooth both have the same tooth-shaped structure as the first sawtooth (i.e., it can be understood that the left branch tooth or the right branch tooth is obtained by deflecting a certain angle on the basis of the first sawtooth). In the utility model, the first sub-front tool face adjacent to the cutting edge is arc-shaped, so that on one hand, chip breaking is facilitated, and the chip breaking effect is optimized, and on the other hand, the sliding distance of chips on the front tool face is reduced, so that the friction resistance is reduced, and the combined action of the two aspects can effectively prolong the service life of the band saw blade.

The first sub front cutter face is arc-shaped, so that sawdust can be better curled during sawing, and accordingly, sawdust breaking is promoted, the sawdust can be better discharged, and the service life of a band saw blade can be effectively prolonged. The band saw blade of the present invention is especially suitable for sawing long material or workpiece with pure titanium and other cutting chips.

Drawings

FIG. 1 is a schematic view showing the structure of a saw blade according to embodiment 1.

FIG. 2 is a schematic view showing the structure of a saw tooth of the band saw blade according to embodiment 2.

Detailed Description

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

Example 1

Referring to fig. 1, a band saw blade includes a strap and a first sawtooth arranged on the strap, the first sawtooth has a front knife face and a rear knife face 1, the front knife face includes a first sub-front knife face 2 and a second sub-front knife face 3 connected in sequence, the first sub-front knife face 2 and the rear knife face 1 intersect at a cutting edge 12 of the first sawtooth, the second sub-front knife face 3 is connected with the strap in an integrated manner, and the first sub-front knife face 2 is arc-shaped.

The intersection of the first sub-rake face 2 and the second sub-rake face 3 is marked as a notch 23, and from the cutting edge 12 to the notch 23, the included angle TA between the tangent line of each point of the first sub-rake face 2 and the flank face 1 is monotonically increased.

The first sub rake face 2 is convex in the direction of approaching the flank face 1.

The first sub-rake face 2 is arc-shaped.

The distance W between the cutting edge 12 and the notch 23 in the length direction of the strap is 0.6 mm; the distance H between the cutting edge 12 and the notch 23 in the width direction of the shoulder strap satisfies: h =2 × W =1.2 mm.

The included angle TA between the tangent T2 of the first sub-rake face 2 at the cutting edge 12 and the flank face 1 is 50 °. An included angle RA between the tangent line of each point of the first sub-rake face 2 and the width direction of the strap is 10 degrees.

The second sub front tool face 3 is arc-shaped, and is convex towards the direction close to the rear tool face, from the cutting edge 12 to the notch 23, the included angle between the tangent line of the second sub front tool face 3 and the width direction of the strap increases monotonically.

The first saw teeth are middle teeth, and the back belt is further provided with a plurality of left sub teeth and a plurality of right sub teeth.

The pure titanium workpiece is sawed by a common band saw blade (41X 1.3 specification, tooth pitch is 2/3TPI, saw teeth are not designed by the utility model), and saw dust is generally long and is seriously tangled. When the band saw blade described in example 1 (41 x 1.3 gauge, pitch 2/3 TPI) was used to saw pure titanium workpieces, the obtained sawdust was significantly more finely divided, indicating that the effect of breaking the sawdust was good.

Example 2

Referring to fig. 2, example 1 is repeated with the only difference that: the second sub-rake surface 3 in this embodiment includes a second sub-rake surface a31 and a second sub-rake surface B32 connected in sequence, the second sub-rake surface a31 is linear, and the second sub-rake surface B32 is arc-shaped; the second sub rake surface a31 intersects the first sub rake surface 2 at the notch 23, and the second sub rake surface B32 is integrally connected to the shoulder.

The foregoing examples are set forth to illustrate the present invention more clearly and are not to be construed as limiting the scope of the utility model, which is defined in the appended claims to which the utility model pertains, as modified in all equivalent forms, by those skilled in the art after reading the present invention.

Claims

1. The utility model provides a band saw blade, includes the braces and sets up the first sawtooth on the braces, first sawtooth has rake face and back knife face (1), a serial communication port, the rake face is including the first sub-rake face (2) and the sub-rake face of second (3) that connect gradually, first sub-rake face (2) and back knife face (1) intersect in blade (12) of first sawtooth, sub-rake face of second (3) and braces body coupling, first sub-rake face (2) are the arc.

2. The band saw blade according to claim 1, wherein an intersection of the first sub rake face (2) and the second sub rake face (3) is designated as a notch (23), and an included angle TA between a tangent line of each point of the first sub rake face (2) and the flank face (1) monotonically increases or monotonically decreases from the notch (23) to the cutting edge (12) or from the cutting edge (12) to the notch (23).

3. The band saw blade according to claim 2, wherein the first sub-rake surface (2) is convex in a direction close to the flank surface (1) or convex in a direction away from the flank surface (1).

4. The band saw blade according to claim 1, wherein the first sub rake surface (2) is one of a circular arc, an elliptical arc, and a parabolic arc.

5. The band saw blade according to claim 2, wherein the distance W between the cutting edge (12) and the notch (23) in the length direction of the strap is 0.2-1 mm; the distance H between the cutting edge (12) and the notch (23) in the width direction of the strap satisfies the following conditions: h = (1.5-3). times.W.

6. The band saw blade according to claim 1, characterized in that the angle TA between the tangent of the first sub-rake surface (2) at the cutting edge (12) and the flank surface (1) is 45-55 °.

7. The band saw blade according to claim 2, wherein an angle RA between a tangent line to each point of the first sub rake surface (2) and a width direction of the strap is 5-15 °.

8. The band saw blade according to any one of claims 1 to 7, wherein the second sub-rake surface (3) is curved.

9. The band saw blade according to any one of claims 1 to 7, wherein the second sub-rake surface (3) comprises a second sub-rake surface A (31) and a second sub-rake surface B (32) connected in series, the second sub-rake surface A (31) being linear and the second sub-rake surface B (32) being arc-shaped; the second sub-rake face A (31) and the first sub-rake face (2) intersect at the notch (23), and the second sub-rake face B (32) is integrally connected with the braces.

10. The band saw blade according to any one of claims 1 to 7, wherein the strap is provided with a middle tooth, a left tooth and a right tooth; the first saw teeth are middle teeth; or the first saw teeth are middle teeth, and the right branch teeth and the left branch teeth are both provided with the same tooth-shaped structures as the first saw teeth.