JPH08281606A - Tip saw and cutting method - Google Patents

Abstract

PURPOSE: To provide a tip saw of high processing accuracy for the high speed cutting. CONSTITUTION: In a tip saw in which tips 3 are fixed on a number of notch sections 2 formed on the outer periphery of a disk-shaped base metal 1, a left blade 31 and a right blade 32 formed by an inclined outer peripheral blade 6 as tips 3 are provided, and a cutting edge 8 on the lower blade height side of the left and right blades is protruded by the length (t) to the sideway more than a cutting edge 9 on the higher blade height side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tip saw used for cutting, grooving and end face cutting of metal materials such as aluminum alloys and copper alloys as well as construction materials such as plastics, gypsum boards and pulp cement boards. Although superhard materials such as diamond sintered bodies and CBN sintered bodies are mainly used as the chips, there are also chips made of cemented carbide and ceramics.

[0002]

2. Description of the Related Art Tip saws, which are also called circular saws and circular saws, use sintered diamond for their tips.
It is known for its high accuracy and long life. As the cutting edge shape and arrangement of the chips, there are known flat blades, flat blade surface attachments, and staggered blades arranged in parallel or in a staggered manner.

[0003]

The above-mentioned cutting edge shapes and arrangements are for improving cutting performance and life, respectively, but are extremely high in cutting and grooving aluminum alloy equipment for precision equipment. Precision and finished surface roughness are required, and it cannot be said that it is sufficient. Further, it is necessary to perform this highly accurate processing at high speed and with high efficiency.

In order to solve the above-mentioned problems, the inventors of the present invention disclosed in Japanese Patent Application No. 6-287408, a cutting blade which takes charge of most of the cutting in advance and a cutting blade which is important for accuracy. Although it has been proposed that the cutting edge is formed by exposing the side surface of the cutting edge for finishing, the present invention aims to achieve the same object by a simpler edge structure.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and is responsible for most of the cutting on the side of the staggered blade that has a high blade length of the inclined outer peripheral blade. It is characterized in that it is exposed to the tip end side which protrudes outward in the axial direction of the base metal from the tip of the high side on the trailing side having a low blade length.

In order to have such a cutting edge structure, the inclination angles of the side blades of each of the left and right blades with respect to the tip reference surface are made larger on the side having a lower blade length and smaller on the side having a higher blade length.
There are two characteristics. The contents of the present invention will be described in detail below with reference to examples.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic front view of a cutting blade for explaining the structure of the cutting blade in the tip saw shown in the plan view and side view of FIGS. 2A and 2B. In the figure, 1 is an outer diameter of 140 made of cemented carbide
mm, the thickness of the thick portion is 10 mm, and the base metal is provided with eight cutouts 2 at the outer peripheral edge, and chips 3 made of a diamond sintered body are fixed to each cutout 2. Reference numeral 4 denotes a mounting hole having a diameter of 40 mm for mounting the tip saw through the rotary shaft.

FIG. 1 illustrates the shape and arrangement of each tip 3. Reference numeral 31 denotes an outer peripheral blade 6 provided every other one of the eight tips.
Are four left blades which are inclined downward to the right, and 32 are other four right blades whose outer peripheral blades are inclined in the opposite direction. Peripheral blade tip 8 on the side where the blade length is reduced due to the inclination in both tips 31, 32
Is formed so as to project laterally in the axial direction of the base metal from the outer peripheral blade tip 9 on the side with the higher blade length.

In order to accurately and easily carry out this lateral protrusion, the inclination angle of the side blade 7 with respect to the chip reference surface 5 is such that the inclination angle a on the side with a low blade length is larger than a 'on the side with a high blade length. Has been done.

The blade width T of both chips in the above embodiment is 3.
90mm + 0.006-0mm, the protrusion amount t of the blade tip 8 is 0.05 respectively
mm. Note that it is preferable to form a radius of about 0.2 mm at the contact point between the outer peripheral blade 6 forming the blade tip 8 and the side blade 7.

FIG. 3 illustrates a cutting situation of each cutting edge when a groove B having a groove width of 4.00 mm which is perpendicular to the axial direction is cut on the outer periphery of an aluminum alloy round bar by the tip saw having the above cutting edge configuration. It is a schematic diagram. First, rough cutting is performed by the tip 31 which precedes the rotation, but at this time, a difference in the protrusion amount t between the blade tip 9 of the tip 31 and the blade tip 8 of the trailing tip 32 remains. Then, the remaining portion is exposed by the trailing blade tip 8.

As described above, in the cutting of the groove by the cutting edge of the above-described embodiment, each chip alternately bears the rough cutting and the finishing exposure and / or the cutting edge 9 side having a high blade length of each chip. Since it is shared with the blade tip 8 side having a low blade length, the cutting load as a whole is equalized and it is not impossible. Moreover, since the amount of cutting on the blade tip 8 side is small and the load is reduced, vibration near the blade tip is suppressed, and high-precision cutting can be performed at high speed.

In the embodiment, a groove having a groove width tolerance of + 0.01−0 mm and a surface roughness of the side surface 10 of the groove of 3.2 S (no groove bottom roughness is required), which cannot be obtained by conventional cutting, is applied. I was able to. The cutting conditions of this groove were as follows. Work Material Si-Containing Al Alloy Round Bar Diameter 50 mm Rotational Speed 1000 r.pm Feeding Speed 320 mm / min Cutting Fluid Water-Soluble Oil In addition, in the above-mentioned embodiment, the cutting edge is composed only of staggered edges, and left and right alternate Although shown, the flat blades may be included depending on the number of blades, the cutting conditions of the work material, or the required accuracy, and an array other than the alternating blades may be used.

By the way, when similar groove machining is performed by the conventional left blade 31 and right blade 32 having a staggered blade configuration shown in FIG. 4, both blades are in charge of rough cutting as shown in FIG.
Since the tip on the high blade length side is responsible for finishing the groove side surface 10 with a large amount of cutting at the same time, vibration near the cutting edge is likely to occur and it is difficult to perform highly accurate groove processing and cutting.

[0015]

The tip saw according to the present invention is such that the inclination angles of the left and right side blades 7 of the staggered blade with respect to the tip reference surface 5 are increased on the side having a lower blade length, and the blade tips are projected outward. Since the side with the high blade length, which is mainly responsible for cutting, and the side with the low blade length that exposes the side cutting surface are shared, high-precision cutting can be performed at high speed, and the life is relatively long. Also becomes longer. Moreover, the cutting pressure is evenly divided by the cutting edge configuration and the chips are relatively small, so that the cutting is smoothly performed.

[Brief description of drawings]

FIG. 1 is a schematic view from the front of a cutting blade illustrating a configuration of a cutting blade in an embodiment.

2A and 2B are a plan view and a side view, respectively, showing the shape of the tip saw of the embodiment.

FIG. 3 is a schematic diagram illustrating a cutting situation of each cutting edge when a groove is cut by an example tip saw.

FIG. 4 is a schematic view from the front of the cutting blade illustrating the configuration of a conventional staggered blade.

5 is a schematic diagram illustrating a cutting situation of each cutting edge when a groove is cut by the tip saw having the cutting edge configuration shown in FIG. 4. FIG.

[Explanation of symbols]

 1 Disc-shaped base metal 2 Notch on outer peripheral edge of base metal 3 Tip of diamond sintered body 31 Left blade of tip 3 32 Right blade of tip 4 Mounting hole for base metal 5 Reference plane of tip 6 Tip peripheral edge of tip 6 7 Tip Side Blade 8 Blade Tip on Low Blade Length 9 Blade Tip on High Blade Length 10 Side of Groove a Slope Angle on Low Blade Length a'Tilt Angle on High Blade Length T Tip Blade Width t Amount of protrusion of blade tip 8 from blade tip 9 to the side B Width of groove

Claims (3)

[Claims] 1. A tip saw having left and right blades with inclined outer peripheral blades or a staggered blade formed by combining the left and right blades and a flat blade on the outer peripheral edge of a disk-shaped base metal, wherein the blades of the outer peripheral blades with inclined left and right blades. A tip saw characterized in that the tip on the lower side is formed to project laterally in the base metal axis direction from the tip on the higher blade length side. 2. The tip saw according to claim 1, wherein in each of the left and right blades, an inclination angle of the side blade with respect to the tip reference surface is larger on a side with a lower blade length than on a side with a higher blade length. . 3. A staggered blade provided on the outer peripheral edge of a disc-shaped base metal, which is rough-cut on the side with a high blade length of an inclined outer peripheral blade that precedes in the circumferential rotation direction, and the side with a high blade length that follows. A cutting method characterized in that the rough-cut surface is exposed at the tip end side of the side having a low blade length that projects laterally from the tip in the axial direction of the base metal.