TW201904736A - Knife wheel provided with chip removal hole array - Google Patents

Abstract

The invention discloses a knife wheel provided with a chip removal hole array. The knife wheel is disc-shaped and comprises two mutually-parallel disc surfaces; an axle hole communicated with the two disc surfaces is formed in the center of the knife wheel in the axial direction of the knife wheel; the outer peripheries of the disc surfaces extend outwards to form symmetrical conical surfaces; the conical surfaces are crossed to form a cutting edge; a plurality of chip removal holes are formed in the conical surfaces along the outer peripheries of the disc surfaces or in a position where the conical surfaces are connected with the disc surfaces. The knife wheel disclosed by the invention is simple in structure and can effectively avoid and reduce a chip blocking phenomenon.

Description

 Cutter wheel with chip evacuation array  

The invention relates to the field of machining tools, in particular to a cutter wheel with a chip evacuation array.

Existing cutter wheels generate dust and debris/scrap when cutting the material to be processed during use. For example, when cutting glass, the glass chips are rotated by the cutter wheel during the cutting process. The outer edge of the cutting edge enters the gap between the cutter shaft and the cutter wheel and the gap between the cutter holders, so that the rotation of the cutter shaft and the cutter wheel is not smooth, and the cutter wheel is “snapped” and “sliding knife”; at the same time, dust and broken A large amount of scraping adheres between the teeth of the cutting edge of the cutter wheel, resulting in a reduction in cutting quality.

In the prior art, the phenomenon of chip scraping is mainly a remedial method, that is, the cutter wheel is used to clean the cutter wheel after using for a period of time to slow down the adverse effects caused by the chip. However, this method increases the cleaning step and increases the production cost. At the same time, due to the accumulation of debris, the state of the cutter wheel is unstable during operation, which affects the stability and yield of the cutting.

Therefore, it is important to provide a cutter wheel that can effectively solve the chipping phenomenon in production.

In order to overcome the problems in the related art, the present invention provides a cutter wheel with a self-contained chip evacuation array which is simple in structure and can effectively solve the chipping phenomenon.

In order to achieve the above object, the present invention adopts the following technical solution: a cutter wheel with a chip evacuation array, the cutter wheel is disc-shaped, comprising two mutually parallel disk faces 2, along the center of the cutter wheel A shaft hole 4 communicating with the two disk faces 2 is axially opened, and the outer circumference of the disk surface 2 extends outward to form a symmetrical tapered surface 1, and the tapered surfaces 1 intersect to form a cutting edge 3, characterized by: along the disk surface 2 The outer circumference is provided with a plurality of chip evacuation holes 5 on the tapered surface 1 or at a joint where the tapered surface 1 intersects the disk surface 2.

Optionally, the chip evacuation hole 5 is a counterbore, and the cross section thereof has a shape of one or a combination of a circle, a semicircle, a triangle, or other polygons.

Optionally, the bottom of the chip evacuation hole 5 is a combination of one or more of a plane, a curved surface or an inclined surface.

Optionally, the cutter wheel diameter D ranges from 2.0 to 4.0 mm.

Optionally, the cutter wheel diameter D is 2.0 to 3.0 mm, and the number of the chip evacuation holes 5 on the same side of the cutter wheel is 4-15.

Alternatively, the cutter wheel diameter D is 3.0 to 4.0 mm, and the number of the chip evacuation holes 5 on the same side of the cutter wheel is 10 to 20.

Optionally, the diameter d1 of the chip evacuation hole 5 is 10%-20% of the diameter D of the cutter wheel.

Optionally, the depth h of the chip evacuation hole 5 is 30% to 50% of the thickness T of the cutter wheel, the thickness T of the cutter wheel is the distance between the disk faces 2, and the thickness T of the cutter wheel is 0.65~ 1.0mm.

Alternatively, the chip evacuation holes 5 on the same side of the cutter wheel are disposed on the tapered surface 1, and the chip evacuation holes 5 are evenly distributed along the circumferential direction of the tapered surface 1.

Alternatively, the chip evacuation holes 5 on the same side of the cutter wheel are disposed at the intersection of the tapered surface 1 and the disk surface 2, and the chip evacuation holes 5 are evenly distributed on the intersection of the tapered surface 1 and the disk surface 2.

Optionally, an equal number of chip evacuation holes 5 are provided on both sides of the cutter wheel, the chip evacuation holes 5 being axially symmetrical about the plane of the cutting edge 3.

Alternatively, the chip removing holes 5 are respectively disposed on both sides of the cutter wheel, and the chip discharging holes 5 are staggered with respect to the plane of the cutting edge 3.

Optionally, a plurality of through grooves 61 communicating the two disk faces 2 are evenly distributed in the circumferential direction of the hole wall of the shaft hole 4 .

The number of the through grooves 61 is 5 to 12, and the maximum depth in the radial direction is 0.375% to 0.625% of the diameter d of the shaft hole 4.

Optionally, the two hole ends of the shaft hole 4 are respectively provided with grooves 62, and the grooves 62 at each of the hole ends are in communication with the cutter wheel face 2 at the end of the hole.

The number of the grooves 62 is 5-12, the depth of the groove 62 is 15.385%-23.077% of the thickness T of the cutter wheel, and the maximum depth of the radial direction is 0.375%-0.625% of the diameter d of the shaft hole 4.

According to the present invention, by providing a chip evacuation hole 5 at the intersection of the tapered surface 1 of the cutter wheel or the intersection of the tapered surface 1 and the disk surface 2, debris/dust and dust generated during the cutting process are deposited in the chip evacuation hole 5, reducing The probability of debris/scrap and dust entering the shaft hole 4 and the gap between the cutter shaft and the tool holder directly reduces the probability of chip occurrence from the source, improving the cutting quality and production efficiency.

In addition, a chip-passing groove that penetrates or does not penetrate may be provided on the shaft hole wall of the cutter wheel, which further strengthens the function of chip removal, so that the rotation of the cutter wheel and the cutter shaft is smoother.

1‧‧‧ Cone

2‧‧‧

3‧‧‧ cutting edge

4‧‧‧Axis hole

5‧‧‧chip hole

61‧‧‧through grooves

62‧‧‧ Groove

D1‧‧‧ Chip hole diameter

Θ‧‧‧blade angle

H‧‧‧chip depth

T‧‧‧knife wheel thickness

D‧‧‧ shaft hole diameter

D‧‧‧ cutter wheel diameter

In order to more clearly illustrate the technical solutions of the present invention, the drawings used in the embodiments will be briefly described below. Obviously, for those skilled in the art, without any creative labor, Other drawings can also be obtained from these figures.

The first figure is a front view of a first embodiment of a cutter wheel with a chip evacuation array of the present invention.

The second figure is a left side view of the first embodiment of the cutter wheel with the chip evacuation array of the present invention.

The third figure is a schematic diagram of the first embodiment of the cutter wheel with the chip evacuation array of the present invention.

The fourth figure is a front view of a second embodiment of the cutter wheel of the present invention with a chip evacuation array.

The fifth figure is a schematic structural view of a second embodiment of the cutter wheel with the chip evacuation array of the present invention.

Figure 6 is a front elevational view of a third embodiment of a cutter wheel with a chip evacuation array of the present invention.

The seventh figure is a schematic structural view of a third embodiment of the cutter wheel with the chip evacuation array of the present invention.

Figure 8 is a front elevational view of a fourth embodiment of a cutter wheel with a chip evacuation array of the present invention.

Figure 9 is a schematic view showing the structure of a fourth embodiment of the cutter wheel with the chip evacuation array of the present invention.

Figure 11 is a front elevational view of a fifth embodiment of a cutter wheel with a chip evacuation array of the present invention.

The eleventh figure is a schematic structural view of a fifth embodiment of the cutter wheel of the self-contained chip array of the present invention.

Fig. 12 is a front elevational view showing a sixth embodiment of the cutter wheel of the present invention having a chip evacuation array.

Figure 13 is a schematic view showing the structure of a sixth embodiment of the cutter wheel with the chip evacuation array of the present invention.

Fig. 14 is a front elevational view showing a seventh embodiment of the cutter wheel of the present invention with a chip evacuation array.

The fifteenth figure is a schematic structural view of a seventh embodiment of the cutter wheel with the chip evacuation array of the present invention.

Fig. 16 is a front elevational view showing the eighth embodiment of the cutter wheel of the self-contained chip array of the present invention.

Figure 17 is a schematic view showing the structure of the eighth embodiment of the cutter wheel with the chip evacuation array of the present invention.

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The present invention provides a cutter wheel with a chip evacuation array, see the first to third figures. In the first embodiment of the present invention, the cutter wheel has a disk shape, and includes two disk faces parallel to each other. The outer circumferences of the two side disc faces 2 extend outwardly, symmetrically provided with a tapered surface 1, and the intersection of the two tapered surfaces 1 forms a cutting edge 3 of the cutter wheel. The center of the cutter wheel is provided with a shaft hole 4 communicating with the two disk faces 2 along its axial direction. Along the outer circumference of the disk surface 2, a plurality of chip evacuation holes 5 are provided at the junction of the tapered surface 1 and the disk surface 2, and the chip removal holes 5 are counterbore holes, and the cross section thereof has a circular shape. The bottom of the chip removing hole 5 is provided with a plurality of chip discharging holes 5 which are counter holes, the cross section of which is circular in shape, and the bottom of the chip discharging holes 5 is provided in a planar form.

The invention provides the chip removing hole 5, so that the dust and debris generated during the cutting process can directly enter and be stored in the chip discharging hole 5, thereby realizing quick and effective cleaning of the cutting product and the cutter wheel itself, and effectively reducing the chipping. Phenomenon, improve cutting quality and production efficiency.

Specifically, the number of the chip removing holes 5 is positively correlated with the diameter D of the cutter wheel. As shown in the third figure, the diameter D of the cutter wheel ranges from 2.0 to 4.0 mm, and the shaft hole 4 of the cutter wheel The diameter d is 0.8 mm. When the cutter wheel diameter D is 2.0~3.0 mm, the number of the chip evacuation holes 5 on the same side of the cutter wheel is 4-15; when the cutter wheel diameter D is 3.0~4.0 mm, the cutter wheel is the same The number of chip evacuation holes 5 on the side is 10-20. The diameter d1 of the chip evacuation hole 5 is 10% to 20% of the diameter D of the cutter wheel.

The diameter d1 of the chip evacuation hole 5 directly determines the chip discharge performance and the cutting quality. For the products with more dust, more and more chip holes are required, but the number of chip holes is too large. When the hole diameter is too large, not only the strength of the cutter wheel but also the production cost is increased, and the chip hole 5 of the present invention is The number increases from 4 to 20 as the diameter D of the cutter wheel increases, which not only satisfies the production requirements, but also contributes to the service life of the cutter wheel and saves processing costs.

Referring to the third figure, the chip evacuation holes 5 on the same side of the cutter wheel are evenly distributed on the intersection line of the tapered surface 1 and the disk surface 2, and the depth h of each of the chip evacuation holes 5 is the thickness T of the cutter wheel. 30%~50%, the cutter wheel thickness T refers to the distance between the two disk faces 2, wherein the thickness T of the cutter wheel ranges from 0.65 mm to 1.0 mm.

The depth h of the chip evacuation hole 5 is affected by the angle θ of the blade edge 3, and the smaller the angle θ of the blade edge 3, the larger the depth h of the chip evacuation hole 5 required. Specifically, referring to the broken line on the chip evacuation hole 5 in the third figure, the angle θ of the cutting edge 3 becomes small, and the edge of the cutter wheel becomes thin when the relative angle θ is large, and the chip removal hole in the third figure. 5 The end face on the side close to the cutting edge 3 disappears, and the three end faces become two end faces, and the chip removing hole 5 becomes an open hole, and the effect of storing the waste is lost. In order to ensure that the chip evacuation hole 5 does not become an open groove, the depth h of the chip removal hole 5 can only be increased. The angle θ of the cutting edge 3 of the cutter wheel of the present invention ranges from 100° to 160°, and the depth h of the chip removal hole 5 is between 30% and 50% of the thickness T of the cutter wheel, and the dust and waste generated at this time. The chips do not overflow, and it is also ensured that the angle θ of the cutting edge 3 is not limited and does not affect the service life of the cutter wheel.

Specifically, the two sides of the cutter wheel are respectively provided with an equal number of chip evacuation holes 5, and the chip removal holes 5 on both sides of the cutter wheel are axially symmetrical with respect to the plane of the cutting edge 3, so that the cutter wheel can be better ensured. Uniform cutting performance. Of course, the chip removing holes 5 on the two sides may be arranged in a staggered manner, and the number of the chip removing holes 5 on both sides may also be unequal, and no excessive limitation is imposed here.

The chip evacuation hole 5 has other arrangement manners. Referring to the fourth and fifth figures, in the second embodiment of the present invention, the chip evacuation hole 5 is a counterbore disposed on the tapered surface 1 and has a cross section. The shape is semicircular, and the size of the diameter d1 of the chip evacuation hole 5 and the requirement of the depth h are similar to those of the first embodiment. Referring to the sixth to ninth embodiments, respectively, the third and fourth embodiments of the present invention, the cross-sectional shape of the chip evacuation hole 5 may be set in the form of a triangle, a square or other polygonal shape, with respect to the chip evacuation hole 5 The requirements of the other main parameters are consistent with the first embodiment.

In addition, according to the sectional shape of the chip evacuation hole 5, the bottom shape of the corresponding chip removal hole 5 can also be selected, that is, the bottom of the chip removal hole can be not only in the form of a plane as shown in the first figure, but also Set the bottom to a rounded bottom or an inclined surface to meet the requirements of different environments.

As can be seen from the fourth to seventh figures, the chip removing hole may be disposed only on the tapered surface 1 and not connected to the disk surface 2, except that it is disposed at the intersection of the tapered surface 1 and the disk surface 2. When the chip evacuation holes 5 on the same side of the disk surface 2 are disposed on the tapered surface 1, the chip evacuation holes 5 are evenly distributed along the circumferential direction of the tapered surface 1.

When the cutter wheel cuts glass or other products, the generated waste can enter the chip removal hole 5 provided on the tapered surface 1 through the cutting edge 3 and the tapered surface 1 to realize the effect of storing waste and reducing chipping. In contrast, the chip evacuation holes 5 are not suitable for being disposed only on the disk surface 2, which may cause dust and waste particles to not easily enter the chip evacuation holes 5 from the cutting edge 3 of the cut product, thereby affecting the effect of the waste storage.

In addition to the chip evacuation hole 5, the invention can also be provided with a structure for assisting chip removal at other positions of the cutter wheel. For example, a chip flute can be arranged on the shaft hole wall of the shaft hole 4 to assist in chip removal. The waste and dust falling between the cutter shaft and the shaft hole wall of the cutter wheel can be discharged outside the cutter wheel along the chip flute, further avoiding the occurrence of chipping.

Referring to the tenth and eleventh drawings, in a fifth embodiment of the present invention, the intersection of the tapered surface 1 and the disk surface 2 of the cutter wheel is provided with a cylindrical chip evacuation hole 5, the shaft hole 4 A plurality of through grooves 61 communicating with the two disk faces 2 are uniformly distributed in the circumferential direction of the hole wall. The cross-sectional shape of the through grooves 61 is U-shaped or V-shaped or trapezoidal, and the number is 5 to 12, and the number is too small. The effect of chip removal is not obvious. When the number is too large, the oscillation of the cutter wheel may be too large, which affects the stability of the cutter wheel movement.

The maximum depth of the through groove 61 in the radial direction is 0.375% to 0.625% of the diameter d of the shaft hole 4. If the radial depth of the flutes is too shallow, the effect of chip removal is not obvious, and too deep will reduce the strength of the shaft hole of the cutter wheel.

During the process of cutting the glass, the scraps falling between the cutter shaft and the wall of the shaft hole can be discharged outside the cutter wheel along the chip flute to avoid chipping.

Referring to the twelfth and thirteenth drawings, in a sixth embodiment of the present invention, the chip evacuation hole 5 is disposed on the tapered surface 1 and has a semicircular cross section in the radial direction, and the hole of the shaft hole 4 A plurality of through grooves 61 communicating the two disk faces are evenly distributed in the circumferential direction of the wall. In practical applications, the chip evacuation holes 5 may also be arranged in a triangular shape, a square shape or other polygonal shapes.

In addition to providing a through chip flute, the chip flute may be provided in other forms. Referring to the fourteenth and fifteenth drawings, in accordance with a seventh embodiment of the present invention, the tapered surface of the cutter wheel 1 and The intersection of the disk faces 2 is provided with a cylindrical chip evacuation hole 5 which is a groove 62 formed at the orifice end of the shaft hole 4, and the groove 62 at each orifice end is associated with the hole The cutter wheel face 2 at the mouth end is in communication. The cross-sectional shape of the groove 62 is U-shaped or V-shaped or trapezoidal, etc., and the number is 5-12.

The depth of each of the grooves 62 is 15.385% to 23.077% of the thickness T of the cutter wheel, and the maximum depth in the radial direction is 0.375% to 0.625% of the diameter d of the shaft hole 4.

The groove 62 does not communicate with the two disk surfaces of the cutter wheel. When the cutter shaft rotates in the cutter wheel, the contact area between the cutter shaft and the shaft hole can be reduced, thereby reducing the chipping phenomenon between the cutter shaft and the cutter wheel. Also, the dust generated during the cutting process is discharged along the groove 62 to the outside of the cutter wheel.

Further, referring to the sixteenth and seventeenth embodiments, in the eighth embodiment of the present invention, the shape of the chip evacuation hole 5 is similar to that of the sixth embodiment, that is, on the cutter wheel provided with the groove 62. The shape of the chip evacuation hole 5 may be semicircular, and the chip evacuation hole 5 may be provided only on the tapered surface 1.

The present invention is provided with a chip evacuation hole 5 at the intersection of the tapered surface 1 of the cutter wheel or the intersection of the tapered surface 1 and the disk surface 2, and wastes and dust generated during the cutting process are deposited in the chip evacuation hole 5, thereby reducing waste. And the probability that the dust enters the shaft hole 4 and the gap between the cutter shaft and the tool holder, directly reduces the probability of chip occurrence from the source, and improves the cutting quality and production efficiency. In addition, a chip-passing groove that penetrates or does not penetrate may be provided on the shaft hole wall of the cutter wheel, which further strengthens the function of chip removal, so that the rotation of the cutter wheel and the cutter shaft is smoother.

Other embodiments of the invention will be apparent to those skilled in the <RTIgt; The present invention is intended to cover any variations, uses, or adaptations of the present invention, which are in accordance with the general principles of the invention and include common general knowledge or common technical means in the art that are not disclosed in the present invention. . The description and examples are to be considered as illustrative only, and the scope of the invention

Claims (17)

 The utility model relates to a cutter wheel with a chip evacuation array, wherein the cutter wheel has a disc shape and comprises two parallel disk faces (2), and two disk faces are connected along the axial direction of the center of the cutter wheel (2) a shaft hole (4) extending outwardly of the disk surface (2) to form a symmetrical tapered surface (1) intersecting to form a cutting edge (3) characterized by On the outer circumference of the disk surface (2), a plurality of chip evacuation holes (5) are provided on the tapered surface (1) or at the junction of the tapered surface (1) and the disk surface (2).    The cutter wheel of the self-contained chip array according to claim 1, wherein: the chip removal hole (5) is a counterbore, and the cross section is in the shape of a circle, a semicircle, a triangle or other polygons. A combination of one or more.    A cutter wheel with a chip evacuation array as claimed in claim 2, wherein the bottom of the chip evacuation hole (5) is a combination of one or more of a plane, a curved surface or an inclined surface.    The cutter wheel of the self-contained chip array according to claim 1, wherein: the diameter D of the cutter wheel ranges from 2.0 to 4.0 mm; when the diameter D of the cutter wheel is 2.0 to 3.0 mm, the cutter wheel is the same The number of chip removal holes (5) on the side is 4 to 15; when the diameter D of the cutter wheel is 3.0 to 4.0 mm, the number of chip removal holes (5) on the same side of the cutter wheel is 10 to 20.    The cutter wheel of the self-contained chip array according to claim 4, wherein the diameter d1 of the chip evacuation hole (5) is 10% to 20% of the diameter D of the cutter wheel.    The cutter wheel of the self-contained chip array according to claim 4, wherein: the depth h of the chip removal hole (5) is 30% to 50% of the thickness T of the cutter wheel, and the thickness T of the cutter wheel is a disk surface. (2) The distance between the cutter wheel thickness T is 0.65-1.0 mm.    The cutter wheel of the self-contained chip array according to any one of claims 1 to 6, wherein: the chip evacuation hole (5) on the same side of the cutter wheel is disposed on the tapered surface (1), the row The chip holes (5) are evenly distributed along the circumferential direction of the tapered surface (1); or the chip removing holes (5) on the same side of the cutter wheel are disposed at the intersection of the tapered surface (1) and the disk surface (2) The chip evacuation holes (5) are evenly distributed on the intersection line of the tapered surface (1) and the disk surface (2).    The cutter wheel of the self-contained chip array according to any one of claims 1 to 6, wherein: an equal number of chip evacuation holes (5) are respectively disposed on both sides of the cutter wheel, and the chip removal holes ( 5) Axis symmetry about the plane of the cutting edge (3); or, both sides of the cutter wheel are respectively provided with chip discharging holes (5), and the chip discharging holes (5) are staggered with respect to the plane of the cutting edge (3) Settings.    The cutter wheel of the self-contained chip array according to claim 7, wherein: an equal number of chip evacuation holes (5) are respectively disposed on both sides of the cutter wheel, and the chip removal holes (5) are related to the cutting edge (3) The plane of the plane is axisymmetric; or, both sides of the cutter wheel are respectively provided with chip evacuation holes (5), and the chip removal holes (5) are staggered with respect to the plane of the cutting edge (3).    The cutter wheel of the self-contained chip array according to any one of claims 1 to 6, wherein: the hole of the shaft hole (4) is evenly distributed in the circumferential direction with a plurality of through grooves communicating the two disk faces (2) (61); the through grooves (61) are 5 to 12, and the maximum depth in the radial direction is 0.375% to 0.625% of the diameter d of the shaft hole (4).    The cutter wheel of the self-contained chip array according to claim 7, wherein: the hole wall of the shaft hole (4) is evenly distributed in the circumferential direction with a plurality of through grooves (61) communicating the two disk faces (2); The through grooves (61) are 5 to 12, and the maximum radial depth is 0.375% to 0.625% of the diameter d of the shaft hole (4).    The cutter wheel of the self-contained chip array according to claim 8, wherein: the hole wall of the shaft hole (4) is evenly distributed in the circumferential direction with a plurality of through grooves (61) communicating the two disk faces (2); The through grooves (61) are 5 to 12, and the maximum radial depth is 0.375% to 0.625% of the diameter d of the shaft hole (4).    The cutter wheel of the self-contained chip array according to claim 9, wherein: the hole wall of the shaft hole (4) is evenly distributed in the circumferential direction with a plurality of through grooves (61) communicating the two disk faces (2); The through grooves (61) are 5 to 12, and the maximum radial depth is 0.375% to 0.625% of the diameter d of the shaft hole (4).    The cutter wheel of the self-contained chip array according to any one of claims 1 to 6, wherein: the two hole ends of the shaft hole (4) are respectively provided with grooves (62), each hole The groove (62) at the mouth end is in communication with the cutter wheel face (2) at the end of the hole; the groove (62) is 5~12, and the depth of the groove (62) is the thickness of the cutter wheel. 15.385%-23.077% of T, the maximum depth in the radial direction is 0.375%-0.625% of the diameter d of the shaft hole (4).    The cutter wheel of the self-contained chip array according to claim 7, wherein: the two hole ends of the shaft hole (4) are respectively provided with grooves (62), and recesses at the ends of each of the holes The grooves (62) are all in communication with the cutter wheel face (2) at the end of the orifice; the grooves (62) are 5-12, and the depth of the groove (62) is 15.385% of the thickness T of the cutter wheel- 23.077%, the maximum depth in the radial direction is 0.375% - 0.625% of the diameter d of the shaft hole (4).    The cutter wheel of the self-contained chip array according to claim 8, wherein: the two hole ends of the shaft hole (4) are respectively provided with a groove (62), and the groove at each hole end is concave The grooves (62) are all in communication with the cutter wheel face (2) at the end of the orifice; the grooves (62) are 5-12, and the depth of the groove (62) is 15.385% of the thickness T of the cutter wheel- 23.077%, the maximum depth in the radial direction is 0.375% - 0.625% of the diameter d of the shaft hole (4).    The cutter wheel of the self-contained chip array according to claim 9, wherein: the two hole ends of the shaft hole (4) are respectively provided with grooves (62), and recesses at the ends of each of the holes The grooves (62) are all in communication with the cutter wheel face (2) at the end of the orifice; the grooves (62) are 5-12, and the depth of the groove (62) is 15.385% of the thickness T of the cutter wheel- 23.077%, the maximum depth in the radial direction is 0.375% - 0.625% of the diameter d of the shaft hole (4).