JPH0727723U - Saw blade - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a saw blade which is capable of performing high-speed cutting by appropriately chamfering the tooth tips and preventing chipping of the tooth tips. [Structure] A chamfered portion 11 is provided at an acute tooth tip of each saw blade 3, and a chamfered angle A of the chamfered portion 1 is defined by a vertical line KK of the tooth tip.
Is set to be within the angle range of 35 degrees to 55 degrees.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a saw blade, and more particularly to a saw blade such as a band saw blade for metal cutting or a circular saw blade.

[0002]

[Prior art]

 Conventionally, in a saw blade for metal cutting, for example, a circular saw blade or a band saw blade made of a super hard material is used to cut a work. In the case of a circular saw blade, the shape of the tooth tip of this saw blade is chamfered at the acute angle portion of each tooth tip, and the chamfer angle is about 20 degrees with reference to the vertical line of the tooth tip. Further, in the case of a band saw blade, it is general that chamfering of the tooth tip is not performed at all.

[0003]

[Problems to be solved by the device]

 By the way, the above-mentioned cemented carbide saw blade has a problem that it becomes impossible to cut due to chipping of the tooth tip during high-speed cutting.

In order to solve the above problems, an object of the present invention is to provide a saw blade in which a tooth tip is appropriately chamfered to enable high-speed cutting and prevent the tooth tip from being chipped.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a chamfered portion at each tooth tip of an acute angle of a saw blade, and the chamfered angle of the chamfered portion is within an angle range of 35 degrees to 55 degrees with reference to the vertical line of the tooth tip. As a saw blade.

[0006]

[Action]

 By adopting the saw blade of this invention, a chamfered portion having a chamfering angle of 35 to 55 degrees is provided at the tooth tip of the saw blade. For this reason, it is possible to perform high-speed cutting without chipping of the tooth tip during high-speed cutting.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

With reference to FIGS. 1 and 2, although a band saw blade made of a super hard material will be described in the present embodiment, the present invention can also be applied to a circular saw blade or the like.

The saw blade 3 of the band saw blade 1 has a rake face 5, a straight face 7 extending to the rake face 5, a second angle face 9 and an intersection of the straight face 7 and the second angle face 9. It is formed with the chamfered portion 11 provided. In the saw blade 1 thus formed, A represents a chamfering angle, C represents a chamfering amount, D represents a second angle, and the KK line represents a vertical line which is a reference of the chamfering angle.

As a result of conducting various experiments with the above-mentioned configuration, for example, when the material to be cut of the material S45C is cut by the band saw blade 1, the second angle D is 20 degrees, the chamfering angle A is 45 degrees, and the chamfering is 45 degrees. Cutting was performed with the amount C set to 0.1 mm. As a result, the best results were obtained in terms of chipping of the tooth tip and cutting resistance. The chamfering amount C needs to be changed depending on the cutting conditions (cutting amount) and the work material.

Further, according to the results of the various experiments described above, in the case of the band saw blade, the second angle D needs to be 15 degrees or more to perform normal cutting. When the chamfering angle A is less than 35 degrees in the shape of the second angle D, chipping occurs at the tooth tip and cutting becomes impossible, and when the chamfering angle A exceeds 55 degree, chipping of the tooth tip can be prevented. However, the cutting resistance increased and it became impossible to cut. Therefore, the chamfering angle A of 35 to 55 degrees is good in terms of chipping of the tooth tip and cutting resistance.

Next, FIG. 3 shows data when 5 CUT cutting was performed on a material S45C, 250 mm round bar under the conditions of a saw speed of 60 m / min and a cutting rate of 200 cm ² / min. It is a graph plotting the values of cutting resistance and chipping when the chamfering amount C is constant and the chamfering angle A is changed from 30 degrees to 60 degrees.

As can be understood from this graph, it is understood that the chamfering angle A having a range of 35 to 55 degrees is suitable for high speed cutting.

It should be noted that the present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes.

[0015]

[Effect of device]

 As can be understood from the above description of the embodiment, according to the present invention, the tooth tip is chamfered at 35 ° to 55 ° because the structure is as described in the scope of claims for utility model registration. As a result, high-speed cutting is possible and chipping of the tooth tips can be prevented.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a tooth tip of a saw blade which is a main part of the present invention.

FIG. 2 is a side view illustrating the right side of FIG.

FIG. 3 is a graph showing the relationship between chamfering angle, cutting resistance and chipping.

[Explanation of symbols]

 1 Band saw blade 3 Saw blade 11 Chamfering part A Chamfering angle KK line Vertical line

Claims (1)

[Scope of utility model registration request] 1. A chamfered portion is provided at each tooth tip at an acute angle of a saw blade,
The chamfer angle of this chamfer is 3 based on the vertical line of the tooth tip.
A saw blade having an angle range of 5 degrees to 55 degrees.