JP5794654B2 - Ultra-thin tip saw - Google Patents

Description

  The present invention relates to an ultra-thin tip saw with a very thin overall thickness.

  As shown in FIGS. 6 to 8, generally, in the tip saw 51, saw blades 53 are formed on the outer periphery of a disk-shaped base metal 52 at regular intervals, and a step is formed on the rotation direction (arrow B direction) side of the saw blades 53. A pedestal 54 is provided, and a cemented carbide chip 55 or the like is fixed or bonded to the pedestal 54.

  In the conventional tip saw 51, the tip 55 has a so-called vertically long shape in which the relationship between the height (H) and the length (L) is H> L and is long in the radial direction of the tip saw 55. In addition, the pedestal 54 has a shape corresponding to this. Such a vertically long shape is because a method for fixing to the pedestal 54 has been technically established in this shape and sufficient fixing strength is maintained. In addition, a grinding machine for forming a chip can be easily manufactured with a chip shape of H> L, and re-polishing can be easily performed by grinding the outer edge of the chip. .

JP-A-5-285723 JP-A-6-246535 JP 2000-84731 A JP 2000-254822 A JP 2008-188712 A

  However, in the case of the tip saw 51 to which the tip 55 of H (height)> L (length) is fixed, the radial angle αr on the side surface of the tip is reduced even if the width W of the tip 55 is reduced to suppress the cutting resistance. In addition, since the tip 55 has a shape of H (height)> L (length), the distance J from the blade tip of the tip 55 to the blade bottom 56a of the blade chamber 56 becomes long, and as a result, the entire tip saw There was a problem that it was difficult to ensure sufficient strength. For this reason, even if such a tip saw is manufactured, the service life is very short, and the outer diameter of the tip saw 51 is greatly reduced each time the tip 55 is re-polished, so that the cuttable range is very narrow. There was also a drawback of becoming. Therefore, the actual situation is that such a tip saw can be used only for a very thin material to be cut.

  Further, in order to maintain the strength of the base metal while reducing the chip width, there is known a chip saw in which only the thickness of the outer peripheral region including the vicinity of the blade part of the base metal is made thinner than the thickness of the base metal body part and the chip width. However, even in the tip saw, since the tip has a shape of H (height)> L (length), there is a problem similar to the above-described conventional general-purpose tip saw, and the outer peripheral region of the base metal In order to reduce only the thickness of the base metal, there has been a problem that the number of base metal processing steps is greatly increased.

  In addition, the longitudinal direction of the tip is the same as the traveling direction of the cutting tool, and the length from the outermost peripheral edge of the tip to the most concave portion of the blade chamber (tip pocket) is equal to or shorter than the longitudinal length of the tip. Furthermore, a tip saw is also known in which the entire periphery of the blade chamber has a large smooth arc shape.

  In the tip saw, although the tip is formed in a horizontally long shape, its purpose is to reduce the depth of the blade chamber and to make the peripheral shape of the blade chamber into a smooth circular arc with a large radius, etc. This is to reduce the stress concentration, and does not directly solve the above-described problems related to the conventional general chip saw, nor is it intended to reduce the thickness of the chip saw itself. Furthermore, since the structure of the tip saw is very complicated as compared with a general one, there is a drawback that it takes a lot of labor and cost to manufacture.

  Further, a tip saw having a horizontally long tip having a diamond layer is also known, the tip saw is fixed to the base metal so that the short side of the chip is in the radial direction of the base metal, By forming the diamond layer on the short side portion, the formation range of the expensive diamond layer was narrowed, and the thickness of the tip saw itself was not reduced.

  It is an object of the present invention to provide an ultra-thin tip saw that has a very thin overall thickness, can cut a material to be cut sharply at high speed, has a long life, and consumes less power than conventional ones. .

The inventor of the present invention has completed the following present invention based on a technical idea completely different from that of a conventional chip saw in order to make the entire chip saw made of a base metal including a chip and a saw tooth thin. .

The present invention according to claim 1 is a tip saw in which saw teeth are formed at regular intervals on the outer periphery of a disk-shaped base metal, and chips are fixed to a pedestal formed on a front portion of each saw tooth. And the length (L) from the tip end to the rear end of the pedestal is H <L, and H: L = 1: 1 exceeds 3.5. The chip saw is characterized in that the relationship between the height (H) and the chip width (W) is in the range of H: W = 1: 0 · 6 to 3.0. The H: W is more preferably in the range of 1: 0 · 6 to 2.0. More specifically, when L is greater than 1 and less than or equal to 1, the bonding area of the chip becomes small and the bonding strength is insufficient. On the other hand, when L exceeds 3.5, the chip is moved to the outer clearance surface side. As a result, there is an inconvenience that the number of saw teeth cannot be increased. Therefore, the range of H: L = 1: 1 to 3.5 is preferable. Further, by setting H: W within the range of 1: 0 · 6 to 3.0, the entire tip saw can be made thin while maintaining a large radial angle on the side surface of the tip. As a whole, it becomes too thin and the material to be cut cannot be cut, and when it exceeds 3.0, it does not become a thin tip saw, and more preferably has a particularly good thickness within a range of 2.0 or less. .

Although the tip saw of the present invention is mainly intended for cutting metal materials, it can also be used for cutting other materials.

Further, in the present invention of claim 1, the pedestal is formed in a concave arc shape when viewed from the side, and the lower surface portion of the chip joined to the pedestal is formed in a convex arc shape corresponding to the concave arc shape of the pedestal. It is characterized by being substantially fan-shaped when viewed from the side with the cutting edge as the apex.

The concave arc of the pedestal surface and the convex arc of the lower surface portion of the chip joined thereto are preferably in the range of 0.65R to 3.0R.

The present invention of claim 2 Symbol placement, said the chip saw of claim 1, wherein walls upper rear blade chamber between each of the base metal saw teeth is notched in inclined extending upwardly, the gullet opening Is characterized by being spread.

  According to the first aspect of the present invention, the relationship between the height (H) from the tip end to the front end of the pedestal and the length (L) from the tip end to the rear end of the pedestal is H <L, By setting H: L = 1: 1 (excess) to 3.5, the bonding strength of the chip to the pedestal is sufficiently ensured, and the relationship between the height (H) and the chip width (W) is H. : By setting W = 0.6-3.0, the overall thickness of the tip saw including the tip can be made very thin while maintaining a large radial angle (αr) on the side surface of the tip. Various materials to be cut having different materials and shapes can be cut at a higher speed and stronger than before.

  As described above, the very thin tip saw of the present invention has little contact with the material to be cut, so that the wear and chip of the tip are greatly suppressed, and the cutting resistance increases due to the cutting of the material to be cut. Since it can suppress, the lifetime can also be extended significantly compared with the past.

  In addition, according to the present invention described in claim 1, as described above, the material to be cut can be cut smoothly at a high speed, so that the power consumption of the cutting machine can be greatly reduced. Moreover, since the amount of chips of the material to be cut is smaller than that of the conventional material, it is advantageous in terms of resources.

Furthermore , according to the first aspect of the present invention, the pedestal has a concave arc shape when viewed from the side, and the lower surface portion of the chip joined thereto has a convex arc shape corresponding to the concave arc shape of the pedestal. The chip can be fixed or bonded more stably, and the bonding area of the chip can be increased, so that the bonding strength of the chip can be further improved.

  In addition, since the tip has a substantially fan shape when viewed from the side with the tip of the tip as a vertex, the shape of the tip itself is much smaller than that of the prior art, and the above-described sharp cutting with less cutting resistance is possible. In addition, when the chip is re-polished in use, the cutting edge on the front side of the chip is polished, so the outer diameter of the entire tip saw is hardly reduced, so the cutting range is re-polished as in the past. The problem of drastically narrowing is also eliminated.

The tip saw according to the second aspect of the present invention has a structure in which only the opening of the blade chamber is widened upward, so that the strength of the base metal itself is maintained as it is and the material to be cut is rounded in the blade chamber. Since the chips of the material are immediately discharged from the blade chamber, even a thick material to be cut can be cut quickly and quickly without degrading the cutting performance, thereby further improving the efficiency of the cutting work. it can.

1 is a side view of a tip saw according to the present invention. It is a front view of the same chip saw. It is an enlarged view of the A section in FIG. It is a front view of the sawtooth in FIG. It is an expansion perspective view of the sawtooth part in the chip saw of the present invention. It is a side view of the sawtooth part of the conventional chip saw. It is an enlarged view of one sawtooth in FIG. It is a front view of the sawtooth of FIG.

  Next, an embodiment when the present invention is applied to a metal cutting tip saw will be described with reference to the drawings, but the present invention is not limited to such an embodiment.

  As shown in FIG. 1 to FIG. 3 and FIG. 5, the saw saw 1 has saw blades 3 formed at regular intervals on the outer periphery of the disc-shaped base metal 2, and the front side of each saw tooth 3 (the tip saw rotating direction B side). The chip 5 is fixed or bonded to the formed base 4.

  As shown in FIGS. 3 and 5, the pedestal 4 of the sawtooth 3 has a concave arc shape when viewed from the side, and the chip 5 joined to the pedestal 4 has a convex arc surface 5 b whose lower surface portion corresponds to the pedestal 4. Has been made. The tip 5 is substantially fan-shaped when viewed from the side with the cutting edge of the tip 5a as a vertex, and an outer peripheral flank 8 is formed so as to descend obliquely backward (opposite to the rotation direction B of the tip saw) from the tip 5a. A blade portion 9 is formed at a slight angle from the front end 5a obliquely downward and rearward. Further, a notch 7 is formed in the upper part of the rear wall 6a of the blade chamber 6 between the saw teeth 3 of the base metal 2, and the opening 6b of the blade chamber 6 is widened. In the figure, 6c represents a jaw.

As shown in FIGS. 3 to 5, the height (H) from the tip 5 a of the chip 5 to the front end 4 a of the base 4 and the length (L) from the tip 5 a of the chip 5 to the rear end 4 b of the base 4 are shown. The relationship is H <L, and the relationship between the height (H) and the chip width (W) is H ≦ W. Preferably, H: L ranges from 1: 1 (excess) to 3.5, and H: W ranges from 1: 0.6 to 3.0. The width W2 of the notch 7 is preferably 2 mm or less, and the radial angle αr on the side surface of the chip 5 is preferably 50 minutes or more.
The H: W is more preferably in the range of 1: 0.6 to 2.0.

  A cutting test in which the tip saw 1 according to this embodiment is compared with the conventional tip saw shown in FIGS. 6 to 8 will be described below.

  The specifications of the tip saw according to this embodiment used in each test described below are as follows. That is, chip height (H) = 1.1 mm, chip length (L) = 2.6 mm, chip width (W) = 1.2 mm, notch W2 = 0.7 mm, base metal thickness (t) = 0 .94 mm, tip side radial angle (αr) = 1 degree outer shape (D) = 180 mm, number of saw teeth = 40

  (Cutting test 1) Cutting test using a rechargeable portable electric cutting machine

  The tip saw of the present invention and the tip saw of the following comparative form are set in a charging power cutter model EZ3511X (rotation speed = 3,400 revolutions / minute) manufactured by Panasonic Corporation, and SS side edge steel 50 × 50 × 6. The 0 thickness (material to be cut) was fixed to the clamp with its top facing upward and cut.

  The tip saw of the comparative form has an outer diameter of 180 mm, a tip width of 1.7 mm, a base metal thickness of 1.4 mm, a tip height of 3.5 mm, a tip length of 1.75, and a number of saw teeth of 40.

Then, the cutting machine is fully charged in advance, and each chip saw of this embodiment and the comparative embodiment is used to consume all electricity and power down, and the number of times of cutting until cutting becomes impossible (the material to be cut) And the time required for one cutting at the beginning of cutting was measured. The results are shown in Table 1 below.

  Comparing the cutting test results shown in Table 1, with the comparative chip saw, 24 cuts (24 pieces) can be cut with one full charge, and the time required for cutting per cut material at the beginning of the cutting test is 17 seconds. Met. On the other hand, in the tip saw according to the present embodiment, the material to be cut can be cut into 35 by one full charge, and the time required for cutting per material to be cut at the beginning of the cutting test was 11 seconds. Therefore, it was confirmed that the tip saw of this embodiment can cut 11 cuts more than the tip saw of the comparative embodiment, and the time required for one cutting is 6 seconds faster. In short, it has been proved that the tip saw of the present invention can perform a large number of cutting operations faster than the comparative tip saw.

  (Cutting test 2) Cutting test using a 100V power supply portable electric cutting machine

  Set the tip saw of the present invention and the tip saw of the following comparative example on the new Daiwa dustproof cutter model B18N (rotation speed = 4,300 rpm), and attach the cutting machine to the quick vice of Tanitech Co., Ltd. model QV192 Furthermore, SS material such as a beveled steel 50 × 50 × 6.0 thickness (material to be cut) was cut with its top facing upward.

  The tip saw of comparative form 1 has an outer diameter of 180 mm, a tip width of 1.85 mm, a base metal thickness of 1.5 mm, a tip height of 5.5 mm, a tip length of 2.00 mm, and a sawtooth number of 36.

The tip saw of comparative form 2 has an outer diameter of 180 mm, a tip width of 1.40 mm, a base metal thickness of 1.1 mm, a tip height of 4.4 mm, a tip length of 1.95 mm, and a number of saw teeth of 40.

The cutting test is to measure the number of cuts (life), one cutting time and the power value at the initial stage of the cutting test until the cutting of the tip saw into the material to be cut becomes impossible or the cut surface is significantly deteriorated. It went by. The test results are shown in Table 2.

According to the test results, the tip saw according to the present embodiment has a much larger number of cuts than the tip saws of Comparative Examples 1 and 2, and can cut with less power consumption in a short time. It is recognized that

(Cutting test 3) Cutting test for ultra-thin materials

The tip saw of the present invention and the tip saw of the following comparative form are set in a triathlon cutter model TAC192 cutting machine (rotation speed = 3,800 revolutions / minute) manufactured by Tani-Tech Co., Ltd., and corrugated iron plate small wave, width 700 × thickness 0.19 was slide cut in its width direction.

  The tip saw of the comparative form has an outer diameter of 180 mm, a tip width of 1.85 mm, a base metal thickness of 1.4 mm, a tip height of 3.5 mm, a tip length of 1.75 mm, and a number of saw teeth of 40.

Then, the time required for cutting at the initial stage of the cutting test was measured. The results are shown in Table 3.

  As is apparent from the test results, it was confirmed that the tip saw of this embodiment can cut at about half the speed of the comparative tip saw. In addition, in the case of cutting with the tip saw of the comparative form, the sharpness itself is bad, and therefore, the corrugated sheet as the material to be cut vibrates vigorously and the cutting operation itself is very difficult, whereas in the present embodiment In the tip saw, there was almost no vibration of the corrugated plate, and the cutting work could be performed smoothly.

  (Cutting test 4) Thick material cutting test

  The new Daiwa dustproof cutter model B18N (rotation speed = 4,300 rotations / min) is used as the cutting machine 1, and the triathlon cutter model TAC192 cutting machine (rotation speed = 3,800 rotations / min) manufactured by Tani-Tech Co. is used as the cutting machine 2. Then, the tip saw of the present invention and the tip saws of Comparative Examples 1 and 2 described below were set on each of them. Material).

  The tip saw of Comparative Example 1 has an outer diameter of 180 mm, a tip width of 1.85 mm, a base metal thickness of 1.5 mm, a tip height of 5.5, a tip length of 2.00, and a sawtooth number of 36.

The tip saw of comparative form 2 has an outer diameter of 180 mm, a tip width of 1.40 mm, a base metal thickness of 1.1 mm, a tip height of 4.4 mm, a tip length of 1.95 mm, and a number of saw teeth of 40.

And the cutting test was done by measuring the time required for cutting at the initial stage of cutting into the material to be cut. The test results are shown in Table 2.

According to the test results, it was confirmed that the cutting saw according to this embodiment cuts the workpiece faster than the cutting saws of Comparative Examples 1 and 2 regardless of which cutting machine was used.

  According to the tip saw of the present invention, any material to be cut can be quickly cut with little cutting resistance and can be easily cut with low power consumption.

DESCRIPTION OF SYMBOLS 1 Tip saw 2 Disc-shaped base metal 3 Sawtooth 4 Base 4a Front end of base 4b Rear end of base 5 Tip 5a Tip end
H Tip height
L Tip length
W Chip width

Claims (2)

The height (H) from the tip of the tip to the front end of the pedestal and the tip in the tip saw in which saw teeth are formed on the outer periphery of the disk-shaped base metal at regular intervals and the tip is fixed to the pedestal formed on the front portion of each saw tooth The relationship between the length from the front end to the rear end (L) of the pedestal is H <L, and H: L = 1: 1 exceeds to 3.5, and the height (H) and the chip width (W ) Is in the range of H: W = 1: 0.6 to 3.0, and the pedestal has a concave arc shape when viewed from the side , and the lower surface of the chip joined thereto has a concave arc shape of the pedestal. The tip saw has a convex arc shape corresponding to the tip, and the tip is substantially fan-shaped when viewed from the side with the tip of the tip as a vertex .  The tip saw according to claim 1, wherein an inclined notch that extends upward is formed in an upper part of the rear wall of the blade chamber between the saw teeth of the base metal, and the opening of the blade chamber is widened.

Images