JP3180763U - Tip saw - Google Patents

Abstract

Provided is a tip saw capable of increasing the centripetal angle and narrowing the blade width of the tip to suppress frictional heat generated in the tip saw when cutting the workpiece and to improve the yield of the workpiece. To do.
A disk-shaped main body, a chip welding surface connected to a peripheral edge of the main body, and a chip welding surface adjacent to the chip welding surface. In the tip saw 1 comprising the base metal 2 having the tip attachment portion 6 provided with the tip 11 and the tip 3 having the tip 3 welded to the tip welding surfaces 7 and 8 and capable of cutting an object to be cut, the tip welding surface 7, 8 and the chip welding surface vicinity portion 11 are formed with a thin portion 10 whose both side surfaces are ground to be thinner than the main body portion 4.
[Selection] Figure 3

Description

  The present invention relates to a chip saw having an improved base metal on which chips are welded.

  A circular saw with a peripheral edge of the base metal and the cutting edge formed integrally with the base metal will wear and crack when the rotational speed is high, so when using at a high rotational speed, A tip saw in which a tip is welded to the periphery of the base metal is used. The base of the chip saw is formed in a disk shape having a certain thickness, and the chip is polished while being welded to the base. A gap (claw allowance) is provided between the tip of the tip and the side surface of the base metal, and an centroid angle is formed on the side surface of the tip.

  In order to reduce the frictional heat generated in the tip saw by sharply cutting the work piece and improving the yield of the work piece, we want to increase the centripetal angle of the insert and reduce the blade width (to reduce the settling allowance). However, since the base is a disk having a certain thickness, the blade width of the tip must be increased in order to obtain a large centripetal angle. When the blade width of the chip is widened, there is a problem that the generated frictional heat increases and the yield of the workpiece is reduced.

  An object of the present invention is to increase the centripetal angle and reduce the blade width of the tip, thereby suppressing the frictional heat generated in the tip saw when cutting the workpiece and improving the yield of the workpiece. To provide a tip saw.

  In order to solve this problem, the device described in claim 1 includes a main body portion formed in a disc shape and attached to a drive shaft, a chip welding surface connected to a peripheral portion of the main body portion, and a chip welded thereto, and the chip In a chip saw comprising a base metal including a chip attachment portion provided with a chip welding surface vicinity adjacent to the welding surface, and a chip welded to the chip welding surface and capable of cutting an object to be cut, chip welding On both the surface and the vicinity of the chip welding surface, both side surfaces are ground to form a thin portion that is thinner than the main body.

According to the second aspect of the present invention, both side surfaces of the thin portion are formed along the centroid angle of the chip.
The invention described in claim 3 is formed in the shape of a drum having a throat portion by a concave arc in the cross section of the thin portion.

  In the device according to the fourth aspect, the non-ground portions that are not ground are provided at the outer peripheral ends of the both side surfaces of the chip mounting portion.

  According to the first aspect of the present invention, the chip welding surface and the portion near the chip welding surface are ground on both sides to form a thin portion having a small thickness. It is possible to increase the centripetal angle by reducing the clasping margin, sharply cutting the object to be cut and suppressing frictional heat generated in the tip saw, and improving the yield of the object to be cut.

  According to the second aspect of the present invention, since both side surfaces of the thin portion are formed along the centroid angle of the chip, the chip welding surface to which the chip is welded is widened to improve the welding strength of the chip. be able to.

According to the third aspect of the present invention, it is possible to easily form the thin portion by operating the surface grinding grindstone that is movable in the vertical direction attached to the existing base metal surface grinder.
According to the fourth aspect of the present invention, since the non-grinding portion is provided at the outer peripheral ends of the both side surfaces of the chip mounting portion, after grinding the side surface on one side of the chip mounting portion, It is possible to grind the other side surface in a stable state in which the grinding part is brought into contact with the surface plate and the fluttering of the grinding surface is suppressed.

1 is a front view of a tip saw according to a first embodiment of the present invention. It is a principal part front view of the peripheral part of the same chip saw. It is a principal part side view of the peripheral part of the same chip saw. It is a principal part top view of the peripheral part of the same chip saw. It is a principal part side view of the peripheral part of the chip saw which concerns on the 2nd Embodiment of this invention. It is a principal part side view of the peripheral part of the chip saw which concerns on the 3rd Embodiment of this invention. It is a principal part front view of the peripheral part of the base which concerns on 4th Embodiment of this invention. It is a principal part side view of the peripheral part of the same base metal. It is the schematic which shows the process sequence of the same base metal.

  A first embodiment of the present invention will be described with reference to FIGS. The tip saw 1 includes a base metal 2 and a large number of chips 3 that are welded to the base metal 2 and cut an object to be cut. As the material of the chip 3, cemented carbide, ceramics, artificial diamond, or the like is used.

  The base metal 2 is formed in a disc shape and has a convex shape between a main body portion 4 to which a drive shaft is attached, a large number of tooth chambers 5 formed on the peripheral edge of the main body portion 4, and adjacent tooth chambers 5, 5. And a formed chip mounting portion 6. Chip welding surfaces 7 and 8 to which the chip 3 is welded are formed at the tip of the chip mounting portion 6. The chip welding surface 7 is inclined by a rake angle α with respect to the radial direction, and the chip welding surface 8 is formed at the inner end of the chip welding surface 7 so as to be orthogonal to the chip welding surface 7.

  Both sides of the chip attachment portion 6 are ground, and a flat thin portion 10 having a thickness smaller than that of the main body portion 4 is formed outside the stepped portion 9. The chip welding surface 7 and the chip welding surface 8 are thin. It is formed at the tip of the part 10. A portion adjacent to the chip welding surfaces 7 and 8 in the thin portion 10 is referred to as a chip welding surface vicinity portion 11.

  The chip 3 welded to the chip welding surfaces 7 and 8 is polished, and a gap (claw allowance A) is provided between the cutting edge 12 of the chip 3 and the base metal surface 13, and the surface of the chip 3 is inclined. A centripetal angle β, which is an angle, is formed. Since the chip welding surfaces 7 and 8 on which the chip 3 is welded are formed in the thin part 10 which is thinner than the main body part 4, the direction of the chip can be reduced without increasing the settling allowance A (widening the blade width T of the chip). The core angle β can be increased.

  Chip welding surfaces 7 and 8 on which the chip 3 is welded are formed to be thin, and a chip welding surface vicinity 11 having the same thickness as the chip welding surfaces 7 and 8 is formed adjacent to the chip welding surfaces 7 and 8. Therefore, it is possible to prevent the grindstone for polishing the chip 3 from coming into contact with the base metal 4 or the welding agent and causing clogging.

  As a result, the object to be cut and the tip 3 can be contacted, or the object to be cut can be sharply cut by suppressing the frictional heat generated when the object to be cut and the base metal 2 are in contact with each other. The yield can be improved.

  The tip 3 is formed with a turning angle γ that is a clearance angle opened rearward from the blade edge 12. Further, when the thin portion 10 is ground into a flat plate shape, it can be simply ground using a grinding wheel for surface grinding as it is.

  A second embodiment of the present invention will be described with reference to FIG. The description overlapping with the description of the first embodiment is omitted, and the same reference numerals are used. Both side surfaces of the chip mounting portion 21 are ground to form thin portions 22 that are thinner than the main body portion 4. The thin portion 22 gradually decreases in thickness toward the inside, and the cross section is formed in a trapezoidal shape. By forming both side surfaces 23 and 23 of the thin portion 22 along the centroid angle β of the chip 3, the chip welding surfaces 24 and 25 can be widened to improve the welding strength of the chip 3.

  Since the chip welding surface vicinity portion 26 formed adjacent to the chip welding surfaces 24 and 25 is formed thin like the chip welding surfaces 24 and 25, the grindstone for polishing the chip 3 is the base metal 2 or the welding. It is possible to prevent clogging due to contact with the agent.

  As a grindstone for grinding the thin portion 22 of the chip attachment portion 21, it is possible to grind at once using a grindstone that is processed in a state where the grinding surface is inclined obliquely along the centroid angle β. Moreover, it can also grind in multiple times using the narrow surface polishing grindstone. In this case, the grinding depth can be gradually reduced as the surface polishing grindstone is moved outward in the radial direction of the base metal 2 to make the thin portion 22 an inclined surface substantially along the centroid angle. .

A third embodiment of the present invention will be described with reference to FIG. The description overlapping with the description of the first or second embodiment is omitted, and the same reference numerals are used. Both side surfaces of the chip attachment portion 31 are ground to form thin portions 32 that are thinner than the main body portion 4. The cross section of the thin portion 32 is formed in a drum shape having a throat portion 34 by two concave arcs 33, 33 formed on both sides.
Such a thin portion 32 can be easily formed by moving up and down a vertical grinding grindstone attached to an existing base metal surface grinder.

  The chip welding surfaces 35 and 36 to which the chip 3 is welded are formed on the outer peripheral side of the thin throat 34, and the chip welding surface 35 is formed in a trapezoidal shape with a thin inner side by two arcs 33 and 33. Has been. By forming the arcs 33 and 33 forming the chip welding surface 35 along the centric angle β of the chip 3, the chip welding surfaces 35 and 36 can be widened to improve the welding strength of the chip 3. The vicinity of the chip welding surface has a throat 34 that is thinner than the chip welding surfaces 7 and 8, and prevents the grindstone that polishes the chip from coming into contact with the base metal 2 or the welding agent to cause clogging. can do.

  A fourth embodiment of the present invention will be described with reference to FIGS. The description overlapping with the description of the third embodiment is omitted, and the same reference numerals are used. The chip attachment portion 31 is formed with a thin portion 32 having a drum-shaped cross section having a throat portion 34 by two concave arcs 33, 33, but outside the thin portion 32 and on the tip attachment portion 31. Unground parts 41, 41 that are not ground are left at the outer peripheral ends of both side surfaces. The thickness of the non-grinding portions 41 and 41 is the same as the thickness of the main body portion 4.

  The processing method of the base metal 3 provided with the non-grinding parts 41, 41 will be described with reference to FIG. The disc-shaped base metal 2 is provided with non-grinding portions 41, 41 having a width of 0.5 mm, for example, on both sides of the outer periphery, and is ground from a position of, for example, 0.5 mm from the outer peripheral end surface to form arcs 33, 33. The The arcs 33 and 33 are formed to a depth of 0.2 mm using, for example, a grindstone 42 having a radius of 50 mm.

  Since the non-grinding portions 41 and 41 are provided on the outer periphery of the base metal 2, after grinding one surface of the base metal 2, when grinding the other surface, the non-grinding portion of the one surface The surface on the other side can be ground in a stable state where 41 is brought into contact with the surface plate 43 and the fluttering of the ground surface is suppressed. As a result, the surface on one side and the surface on the other side can be ground in a stable state. In addition, 44 is a rotation center of the surface plate 16, and 45 is a rotation center of the grindstone 42.

  As described above, the main body 4 formed in a disk shape and attached to the drive shaft, the chip welding surfaces 7 and 8 connected to the peripheral edge of the main body 4 and the chip 3 is welded, and the chip welding surfaces 7 and 8 are provided. Chip saw 1 including a base metal 2 provided with a chip attachment portion 6 provided with an adjacent chip welding surface vicinity portion 11 and a chip 3 welded to the chip welding surfaces 7 and 8 and capable of cutting an object to be cut. The chip welding surfaces 7 and 8 and the chip welding surface vicinity portion 11 are formed with thin portions 10 whose both side surfaces are ground to be thinner than the main body portion 4. It is possible to reduce the frictional heat generated in the tip saw 1 by sharply cutting the object to be cut and increasing the yield of the object to be cut, by narrowing the width (small clamming margin) and increasing the centroid angle β. it can.

Furthermore, since both side surfaces of the thin portion 22 are formed along the centroid angle β of the chip 3, the chip welding surfaces 24 and 25 can be widened to improve the welding strength of the chip 3.
Further, since the cross section of the thin portion 32 is formed in a drum shape having a throat portion 34 by a concave arc, a surface grinding grindstone that is attached to an existing base metal surface grinder and is movable in the vertical direction is operated. Thus, the thin portion 32 can be easily formed.

  Further, since unground parts 41, 41 that are not ground are provided at the outer peripheral ends of both side surfaces of the chip mounting portion 31, after grinding one side surface of the chip mounting portion 31, the one side surface is not yet ground. The grinding | polishing part 41 is made to contact | abut to the surface plate 43, and the other side surface can be ground in the stable state which suppressed the flutter of the grinding surface.

DESCRIPTION OF SYMBOLS 1 Tip saw 2 Base metal 3 Tip 4 Main part 5 Tooth chamber 6, 21, 31 Tip attachment part 7, 8, 24, 25, 35, 36 Tip welding surface 9 Stepped part 10, 22, 32 Thin part 11, 26 Tip Welding surface vicinity part 12 Cutting edge 13 Base metal surface 23 Side surface 33 Arc 34 Throat part 41 Non-grinding part
42 Grinding stone 43 Surface plate 44, 45 Center of rotation

Claims (4)

A chip provided with a main body part formed in a disc shape and attached to a drive shaft, a chip welding surface connected to a peripheral edge of the main body part and to which a chip is welded, and a chip welding surface vicinity adjacent to the chip welding surface A base metal with a mounting portion;
In a chip saw comprising a chip welded to the chip welding surface and capable of cutting an object to be cut,
A chip saw characterized in that a thin portion having a thickness smaller than that of the main body is formed by grinding both side surfaces of the chip welding surface and the vicinity of the chip welding surface. 2. The chip saw according to claim 1, wherein both side surfaces of the thin portion are formed along the centroid angle of the chip. The tip saw according to claim 1 or 2, wherein a cross section of the thin portion is formed in a drum shape having a throat portion by a concave arc. 4. The tip saw according to claim 3, wherein a non-ground portion that is not ground is provided at outer peripheral ends of both side surfaces of the tip attaching portion.

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