JPH055355U - Cutter blade - Google Patents

Abstract

(57) [Abstract] [Purpose] The local and rapid wear of the rotating substrate due to the accumulation of cutting debris is suppressed, the rotating substrate is prevented from becoming unusable before the life of the cutting tip, and the blade usage efficiency and Improve work efficiency. A cutting tip 14 formed by sintering diamond grains is fixed to the outer peripheral surface of the rotary substrate 12, and the outer peripheral ends of the rotary substrate 12 between the respective cutting tips 14 have diameters adjacent to each other. Slot 1 with different depth of cut
6, 18, and 20 are formed. Further, on the rear side surfaces 16a, 18a, 20a in the rotation direction of each slot,
Wear suppressing chips having different radial lengths of the rotating substrate 12 are attached.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  This idea is for asphalt, concrete, bricks, tiles or stone The present invention relates to a blade of a cutter for cutting.

[0002]

[Prior art]

  For example, in the construction of sewage pipes buried underground on the road, asphalt and coke The work of cutting the road surface paved with ncrete with a cutter is done, but this kind of As shown in Fig. 8, the blade used in the cutter is a metal disc-shaped blade. A cutting tip 14 obtained by sintering diamond grains is circumferentially formed on the outer peripheral surface of the substrate 12. It is arranged at equal intervals and fixed by means such as brazing.

[0003]   In addition, the discharge of cutting chips is smoothed to suppress thermal deterioration due to frictional heat and heat From the viewpoint of absorbing the strain of the rotating substrate 12 due to the stress, A slot 80 as a split groove having a constant radial cutting depth is formed therebetween. Has been. The presence of the slot 80 reduces the retention of cutting debris at the cutting site And the discharge of cutting chips is promoted, and the wear of the rotating substrate 12 due to friction heat is light. It will be reduced. Reference numeral 10 indicates a mounting hole for the drive shaft of the cutter device. , Reference numeral 28 indicates a rotation preventing hole. Further, the arrow R indicates the rotation direction of the rotating substrate 12. The symbol C indicates a concrete surface as a cut surface.

[0004]

[Problems to be solved by the device]

By the way, in the conventional device as described above, in each neck portion 82 of the rotary substrate 12 supporting the cutting tip 14, during the cutting, cutting flows or the flows F ₁ and F _{2 of} the slurry mixed with the cooling water are respectively supplied to the slots 80. Concentrate on concentric circles on the bottom side and the top side. For this reason, the cutting dust or the slurry overlaps with each other to locally condense, and as shown in FIG. 9, the portion P _{1 in} the vicinity of the cutting tip 14 and the bottom surface portion P ₂ of the slot 80 are worn, and particularly the bottom surface portion of the slot 80 is worn. In P ₂ , since it is the base portion, the degree of eating is great, and the neck 82 has a problem of thinning early.

[0005]   Due to such thinness of the neck portion 82, the rotary substrate 1 for the cutting tip 14 2, the holding strength, that is, the rigidity is remarkably reduced, and the cutting tip 14 itself is sufficiently used. Despite being able to do so, he is forced to replace the blade early. others Therefore, in addition to the decrease in work efficiency, the work cost due to the decrease in use efficiency of expensive blade Is coming up.

In order to suppress such thinning due to local wear of the rotating substrate, as shown in FIG. 10, a long side is formed on the rear side surface 80 a of the slot 80 in the rotating direction of the rotating substrate 12, that is, the front surface of the neck portion 82. Measures are taken to fix the carbide tips 84, 86, 88 having different thicknesses to improve wear resistance and to disperse the flow of slurry on a non-concentric circle. However, as shown in FIG. 11, although the abrasion resistance effect of the cemented carbide tips 84, 86, 88 themselves and the reduction of wear due to the dispersion effect of the slurry flow are observed in the vicinity P ₁ of the cutting tip 14, early blade replacement is possible. Has not succeeded in suppressing the wear of the bottom surface portion P ₂ of the slot 80 which is an essential factor of the above. Therefore, the above-mentioned problems still exist.

Further, as shown in FIG. 12, a means for providing a cutting tip 92 having a shape covering the rear side surface 90a of the slot 90 in the rotational direction, that is, a so-called triangular diamond tip has been attempted, but the bottom surface portion P _{2 of the} slot 90 is tried. It does not contribute to the wear control of No. 1 and is at the same level as that of providing the carbide tips 84, 86, 88.

[0008]   Therefore, this invention can suppress sudden thinning due to friction with cutting waste. Cutter blade that improves the efficiency of use of the cutting tip and extends the life of the blade. The purpose is to provide the code.

[0009]

[Means for Solving the Problems]

  This invention was devised to achieve the above-mentioned object, and its feature is in the central part. A disk-shaped rotating board with a mounting hole for the drive shaft, and a peripheral surface of the rotating board. And a cutting tip fixed at an interval in the direction, the rotating substrate It has a cutting depth in the radial direction between the cutting tips and cuts adjacent to each other. In the configuration, slots having different embedding depths are formed.

[0010]   Further, according to this invention, the rear surface of the slot in the rotation direction is brought into contact with cutting chips. It can be configured to have a wear suppressing tip that suppresses wear due to touch It

[0011]

[Action]

  According to this invention, the cutting depth of the slot is different, so that the flow of cutting chips is Dispersed in non-concentric circles in the radial direction of the plate, which prevents abrasion of the outer peripheral edge of the rotating substrate. The thinness is reduced, and the rigidity of the rotating substrate for holding the cutting tip is long-term. Maintained throughout.

[0012]   Further, according to this invention, the wear suppressing tip reduces wear in the vicinity of the cutting tip. And further promoted wear reduction due to the different slot depths To be done.

[0013]

【Example】

  1 to 7 show an embodiment of the present invention. The same parts as the conventional example are the same It shows with a code. The drive shaft 2 of the cutter device (not shown) is provided with mounting flanges 4 on both sides. Cutter blade 6 is attached by being sandwiched between 4 and 4, and fixed by tightening bolts 8. There is. This is a so-called wet type that is cooled with water. Is provided with water supply holes 4a, 4a and is supplied from inside and outside the cutter blade 6. The cooling water W to be supplied is supplied to the cutting site via the water supply holes 4a, 4a.

[0014]   The cutter blade 6 is a rotating substrate having a hole 10 for attachment to the drive shaft 2 in the central portion. 12 and a cutting tip fixed to the outer peripheral surface of the rotating substrate 12 at substantially equal intervals in the circumferential direction. 14 and a space formed between the cutting tips 14 on the outer peripheral edge of the rotating substrate 12. The lots 16, 18 and 20 and the rotating substrate 12 in the rotation direction (direction of arrow R) The lots 16, 18, 20 are fixed to the rear side surfaces 16a, 18a, 20a, respectively. It is composed of wear suppressing chips 22, 24 and 26. Reference numeral 28 is a rotation stopper The hole for use is shown.

[0015]   The cutting tip 14 is formed by sintering diamond grains, and means such as brazing It is stuck in.

The slots are formed so that the cutting depths in the radial direction are different from each other adjacent to each other. In this example, three consecutive slots in the circumferential direction are defined as one unit, and the entire rotary substrate 12 is defined as six units. It consists of. Further, the cutting depths in the radial direction are all different within one unit. That is, each of the slots 16, 18, and 20 has a cutting depth d ₁ , d ₂ , or d ₃ that satisfies the relationship of d ₁ <d ₂ <d ₃ .

The wear suppressing tips 22, 24, 26 are made of, for example, cemented carbide or ceramic, and have different heights h ₁ , h ₂ , h ₃ , respectively. In addition, like the wear suppressing tip 26, a position shift setting is also performed to fix the slot 20 at an interval of n from the tip of the slot 20.

Next, the cutting operation of the concrete surface C by the cutter blade 6 will be described. Since the cutting depths d ₁ , d ₂ , d ₃ of the slots 16, 18, 20 are different, the slurry flow F ₁ generated at the bottom surfaces 16 a, 18 a, 20 a of the slots 16, 18, 20 is They are located at distances r ₁ , r ₂ and r ₃ from the center, respectively, and are dispersed in the radial direction. As a result, overcrowding due to the overlapping of the slurry flows F ₁ which are conventionally located on the concentric circle is avoided, and rapid acceleration of wear is reduced. Further, due to the height and displacement of the wear suppressing tips 22, 24, 26, the slurry flow F ₂ generated on the rear side surfaces 16a, 18a, 20a of the slots 16, 18, 20 is also dispersed in the radial direction, and the wear is similarly reduced. To be done.

As a result of the experiment, it was confirmed that the rigidity of the rotary substrate 12 is maintained until the cutting ability of the cutting tip 14 disappears, that is, until the cutting tip 14 is used up sufficiently. In this example, the wear suppressing tips 22, 24 and 26 are used. However, even if the wear suppressing tips 22, 24 and 26 are not used, the bottom portion P ₂ of the slots 16, 18, 20 which is the main factor of the thinness of the rotating substrate 12 is not used. It is possible to reduce rapid wear and maintain the rigidity of the rotating substrate 12. Therefore, the use efficiency of the cutter blade 6 and the work efficiency can be improved.

In the above example, the three slots 16, 18, 20 are formed as one unit, but as shown in FIG. 4, two slots 30, 32 continuous in the rotation direction are set as one unit and the cutting depth is set. The patterns may be d ₄ and d ₅ , respectively. Reference numerals 34 and 36 denote wear suppressing tips. In addition, as shown in FIG. 5, four continuous slots 36, 38, 40, 42 are set as one unit, and the cutting depths are set as d ₆ , d ₇ , d ₈ , and d ₉ , respectively. You can also Reference numerals 44, 46, 48 and 50 indicate wear suppressing tips.

Further, FIG. 6 shows an example of a pattern of slots having a circular bottom surface with a large diameter. Two consecutive slots 52 and 54 are one unit, and the cutting depths are d ₄ and d ₅ , respectively. Is. Reference numerals 56 and 58 denote wear suppressing tips. Further, in FIG. 7, four consecutive slots 60, 62, 64, 66 are one unit, and the cut depths are d ₆ , d ₇ , d ₈ , and d ₉ , respectively. Reference numerals 68, 70, 72 and 74 represent wear suppressing tips.

[0022]   In the above example, the wet type is exemplified, but so-called dry type by the air cooling method is used. It can also be applied to expression types.

[0023]

[Effect of device]

  According to this invention, the retention position of cutting dust or slurry of water and cutting dust is retained. Is dispersed, so localized rapid wear of the rotating substrate due to overcrowding of cutting chips is suppressed. It is possible to avoid the unusability of the rotating substrate with the cutting ability of the cutting tip left. You can As a result, the work efficiency can be improved and the blade usage efficiency can be improved. The rate can be improved.

[0024]   Further, according to the present invention, the wear suppressing tip allows the slot in the rotation direction to be The wear on the rear side of the blade is reduced, which can further improve the life of the blade. it can.

[Brief description of drawings]

FIG. 1 is a side view of a cutter blade according to an embodiment of the present invention in a use state.

FIG. 2 is a schematic vertical sectional view.

FIG. 3 is a partially omitted schematic perspective view.

FIG. 4 is a partial side view showing a modified example of the slot.

FIG. 5 is a partial side view showing a modified example of the slot.

FIG. 6 is a partial side view showing a modified example of the slot.

FIG. 7 is a partial side view showing a modified example of the slot.

FIG. 8 is a side view showing a usage state of a conventional product.

FIG. 9 is a cross-sectional view of an essential part showing a worn state.

FIG. 10 is a partial side view showing another conventional example.

FIG. 11 is a cross-sectional view of an essential part showing a worn state.

FIG. 12 is a partial side view showing another conventional example.

[Explanation of symbols]

2 drive shaft 10 mounting hole 12 rotary substrate 14 cutting tip 16, 18, 20, 30, 32, 36, 38, 40, 4
2, 52, 54, 60, 62, 64, 66 Slots 22, 24, 26, 34, 36, 44, 46, 48, 5
0,56,58,68,70,72,74 Wear control tip

Claims (2)

[Scope of utility model registration request] 1. A rotary substrate having a disk shape having a mounting hole for a drive shaft at a central portion thereof, and cutting chips fixed to an outer peripheral surface of the rotary substrate at intervals in a circumferential direction. A cutter blade having a cutting depth in the radial direction between the cutting tips and slots having different cutting depths formed between adjacent cutting blades. 2. The cutter blade according to claim 1, wherein a wear suppressing tip that suppresses wear due to contact with cutting chips is provided on a rear side surface of the slot in the rotation direction.