JP7112584B2 - Diamond cutting tools for hard brittle and difficult-to-cut materials - Google Patents

Description

TECHNICAL FIELD The present invention relates to the technical field of precision machining tools, and more particularly to a diamond cutting tool for machining hard, brittle, and difficult-to-cut materials.

Currently, in the field of processing hard and brittle materials such as glass, ceramics, or sapphire, glass, ceramics, or sapphire must be processed. Different types of cutting tools must be used accordingly.

Traditional cutting tools are generally manufactured using high speed steel or cemented carbide materials. PCD (Polycrystalline diamond) is a kind of man-made diamond, and is desired in the processing industry because of its properties such as high hardness, high compressive strength, excellent thermal conductivity and wear resistance. With the popularization of PCD materials, PCD cutting tools have emerged, breaking through the limits of traditional cutting tools.

The existing PCD cutting tool cuts PCD into thin pieces and then welds it to a cemented carbide cutting body to make a cutting blade. A cutting tool can usually weld at most only a few pieces of PCD (e.g., 3 cutting tools or 4 cutting tools, etc.), and cannot produce cutting tools with a large number of blades. The cutting effect of the cutting tool is limited.

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the deficiencies of the existing technology and construction, and to provide a cutting tool, its cutting edge, and an ultrasonic tool assembly comprising said cutting tool, to provide a snap-in PCD cutting tool. , More cutting edges can be installed on the same outer diameter polycrystalline diamond cutting body, and the design of the cutting edge type and structure is more diversified, so that the cutting effect can be improved.

In order to achieve the above object, the first aspect of the present invention provides a cutting edge used in a cutting tool, the material of the cutting edge is polycrystalline diamond, and the cutting edge is integrally molded. a cutting body and a number of cutting edges, said cutting edges being helical, each said cutting edge being installed on the outer surface of said cutting body along a central axis circumferential direction of said cutting body; A first chip discharge groove is installed between two said cutting edges adjacent to each other. The first end of the cutting edge is located on the front end surface of the cutting body, and the cutting edge extends along the front end surface of the cutting body and the side surface of the cutting body in turn, so that the cutting edge is The second end is located on the side of the cutting body.

Preferably, the cutting edge part further includes a wiper edge integrally formed on the cutting body, the wiper edge is installed at the first end of the cutting edge and is flush with the cutting edge. transition to

Preferably, the cutting body includes a cutting body end and a connecting part fixedly connected through one end face, and the first end of the cutting edge is installed on the front end face of the cutting body end. and the second end of the cutting edge is located on the side of the cutting body end, so that the cutting edge extends along the front end surface of the cutting body end and the side surface of the cutting body end in turn. and the second end of the cutting edge is located at the connecting portion of the cutting body end and the connecting portion.

Preferably, the end portion of the cutting body includes a first cutting portion and a second cutting portion which are coaxially and fixedly connected and formed in a stepped shape, and the outer diameter of the first cutting portion is equal to the The outer diameter of the second cutting portion is smaller than that of the second cutting portion, and the second cutting portion and the connecting portion are fixedly connected.

Preferably, between the front end surface of the first cutting portion and its side surface, between the first cutting portion and the second cutting portion, and between the front end surface of the second cutting portion and its side surface are all arcs. Adopt transitional connections.

Preferably, a cooling groove is installed in the central portion of the front end face of the cutting body, and the first end of the cutting edge is installed in the outer edge of the cooling groove.

Preferably, the helical direction of the cutting edge may be left-handed or right-handed, and the helical angle of the cutting edge is 15-60°.

Preferably, the outer diameter of the cutting body is 0.5 mm to 135 mm, the number of cutting edges is determined by the width of the cutting edge, and the width of the cutting edge is 0.01 mm to 0.01 mm. 0.2 mm, and the blade length of the cutting edge is 0.1 mm to 15 mm.

Preferably, the groove depth of the first chip discharge groove is 0.05mm to 0.3mm.

Preferably, the wiper blade has a blade length of 0.01 mm to 3 mm.

Preferably, the cutting body is provided with a number of spiral second chip discharge grooves opposite to the direction of the cutting edge, and the second chip discharge grooves extend from the front end face of the cutting body to the Each of the second chip discharge grooves extends laterally and is installed along the circumferential direction of the central axis of the cutting body. The second chip flute divides each cutting edge into several stages.

Preferably, the spiral angle of the second chip discharge groove is 20° to 40°.

Preferably, the distance between two adjacent second chip discharge grooves is 0.25mm~0.75mm, and the groove depth of the second chip discharge grooves is 0.05mm~0.15mm. is.

Preferably, the cutting edge further includes a base, the base is fixedly connected to the rear end surface of the cutting body, and the material of the base is tungsten carbide-based cemented carbide.

For a similar purpose, a second aspect of the present invention provides a cutting tool comprising a tool shank and said cutting edge portion as described above attached to a front end of said tool shank, said tool shank being positioned behind said cutting body. connected to the end face.

Preferably, the material of the tool shank is tungsten carbide-based cemented carbide, the cutting edge further includes a base, the base is fixedly connected to the rear end surface of the cutting body, and the base is The material is tungsten carbide-based cemented carbide, and the tool shank is vacuum-welded to the rear end face of the base.

Similarly, a third aspect of the invention further provides an ultrasonic tool assembly comprising said cutting tool as described above.

The present invention provides a cutting tool, a cutting tool cutting edge, and an ultrasonic tool assembly including the cutting tool, and has the following beneficial effects over the existing art.

By manufacturing the cutting edge portion using a polycrystalline diamond material, the hardness and strength of the cutting edge can be effectively increased, and processing accuracy and processing efficiency can be increased. In addition, by installing the cutting edge of the cutting edge part on the surface of the cutting body by integral molding, more cutting edges can be provided on the polycrystalline diamond cutting body with the same outer diameter than the snap-in type PCD cutting tool. It can be molded, further diversifying the design of the cutting edge type and structure. Also, by distributing several cutting edges along the central axis of the cutting body in the circumferential direction, the plurality of cutting edges can jointly withstand a relatively large cutting force, ensuring strength. In addition, by making the cutting edges helical, the cutting force of each cutting edge can be weakened, and the machining efficiency can be improved by adapting to a relatively high cutting speed and a relatively large supply amount.

The accompanying drawings are included to provide a further understanding of the principles of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

It is a structural schematic diagram of a cutting edge portion in an embodiment of the present invention. FIG. 2 is a local enlarged view of part A of FIG. 1; FIG. 2 is a local enlarged view of part B of FIG. 1; It is a structural schematic diagram of the cutting body end portion of the cutting edge portion in the embodiment of the present invention. FIG. 4 is a side profile schematic view of the cutting edge and wiper blade of the cutting edge portion in an embodiment of the present invention; 1 is a structural schematic diagram of a cutting tool according to an embodiment of the present invention; FIG. FIG. 4 is a structural schematic diagram of a cutting tool viewed from another viewing angle in an embodiment of the present invention; FIG. 8 is a top view of FIG. 7;

Hereinafter, a specific implementation method of the present invention will be described in more detail by combining the drawings and embodiments. The following embodiments are intended to illustrate the invention, not to limit the scope of the invention.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by terms such as "top", "bottom", "left", "right", "top", "bottom" are based on the accompanying drawings. orientation or positional relationship, merely for the purpose of facilitating and simplifying the description of the invention, devices or components shown herein necessarily have a particular orientation and are constructed and operated in a particular orientation It should not be understood as limiting the invention as it is not intended to indicate or suggest. It should be understood that although the present invention uses terms such as "first", "second", etc. to describe each piece of information, these pieces of information should not be limited to these terms. , these terms are merely used to distinguish the same type of information from each other. For example, "first" information may be referred to as "second" information, and, similarly, "second" information may be referred to as "first" information, without departing from the scope of the present invention.

It should also be noted that in the description of the present invention, the terms "front end" and "rear end" refer to the "front end" of the part near one end of the work piece in the course of use of the cutting tool. The portion away from one end refers to the "rear end".

Referring to FIGS. 1 to 5, the first aspect of the preferred embodiment of the present invention provides a cutting edge portion 1 used for a cutting tool, the material of the cutting edge portion 1 is polycrystalline diamond, and the cutting The blade part 1 comprises an integrally formed cutting body 11 and several cutting edges 12, said cutting edges 12 being helical, each said cutting edge 12 extending in the circumferential direction of the central axis of said cutting body 11 is installed on the outer surface of the cutting body 11 along , and a first chip discharge groove 13 is installed between two of the cutting edges 12 adjacent to each other. The first end of the cutting edge 12 is installed on the front end surface of the cutting body 11, and the cutting edge 12 extends along the front end surface of the cutting body 11 and the side surface of the cutting body 11 in turn. , the second end of the cutting edge 12 is located on the side of the cutting body.

In the machining process, the cutting edge part 1 rotates in conjunction with the rotation of each cutting edge 12, cuts material from the workpiece, and discharges chips generated in the cutting process from the first chip discharge groove 13. It is thereby possible to prevent chips from adversely affecting the machining process.

Based on the above technical solution, this embodiment provides a cutting edge part 1 for use in a cutting tool, the cutting edge part 1 is made of polycrystalline diamond, and the cutting body 11 and the cutting edge 12 are integrally formed. By doing so, more cutting edges 12 can be formed on the same outer diameter cutting body 11 than the existing snap-in PCD cutting tools, and the design of the cutting edge 12 type and structure is further improved. Diversified. At the same time, the PCD thin piece can be welded onto the cutting body to avoid the problem of insufficient strength, so that the characteristics of the polycrystalline diamond material can be fully utilized to increase the cutting strength of the cutting edge 1. Therefore, it is possible to effectively improve the cutting accuracy and cutting work efficiency, and extend the service life of the cutting tool. By designing the cutting edge 12 with a helical profile, this embodiment can accommodate higher cutting speeds and feed rates, thereby further increasing machining efficiency.

To give an example, in this embodiment, there are mainly two types of methods for integrally forming the cutting body 11 and the cutting edge 12. The first type is, for example, cumulative material forming such as casting and additive manufacturing. Another type is a method of forming the cutting edge 12 after removing material from the material of the cutting body 11, such as milling, electrical discharge cutting, laser cutting, chemical etching, and the like.

As an alternative implementation, said cutting edge 1 is in particular a milling cutter that can be used to mill the workpiece to form the required contour, in particular the machining The objects are mainly glass products, ceramic products, sapphire products, and the like.

Specifically, referring to FIG. 3 , the cutting edge 1 further includes a wiper edge 17 integrally formed on the cutting body 11 , the wiper edge 17 being the first end of the cutting edge 12 . and smoothly transitions to the cutting edge 12, and by installing the wiper blade 17 on the front end surface of the cutting edge portion 1, removing processing scratches on the processed part and increasing the surface smoothness Preferably, the wiper blade 17 and the cutting edge 12 are in contact and the wiper blade 17 is set horizontally. Referring to FIG. 5 again, by providing a relief at one end of the wiper blade 17 and making the angle α in the drawing obtuse, stress concentration is prevented and the other end of the wiper blade 17 and the cutting edge 12 can be placed in contact with each other.

In a specific embodiment, said cutting body 11 comprises a cutting body end 111 and a connecting part 112 fixedly connected via one end face, the first end of said cutting edge 12 being connected to said cutting body end The second end of the cutting edge 12 is located on the front end face of the portion 111 and the cutting edge 12 extends along the front end face of the cutting body end 111 and the side of the cutting body end 111 in turn. is located on the side of the cutting body end 111 , and the second end of the cutting edge 12 is located at the connecting part of the cutting body end 111 and the connecting part 112 . Only by covering the outer surface of the cutting body end portion 111 with the cutting edge 12 , the cutting requirements can be met and the machining of the cutting edge 12 can be simplified.

Further, referring again to FIGS. 1 and 4, the cutting body end 111 is coaxially and fixedly connected with a first cutting portion 1111 and a second cutting portion 1112 formed in a stepped shape. , the outer diameter of the first cutting portion 1111 is smaller than the outer diameter of the second cutting portion 1112, the second cutting portion 1112 and the connecting portion 112 are fixedly connected, and the cutting edge 12 has a second One end is installed on the front end surface of the cutting body end 111, and the cutting edge 12 is sequentially placed on the front end surface of the first cutting part 1111, the side surface of the first cutting part 1111, the second The second end of the cutting edge 12 is installed on the side surface of the second cutting portion 1112 so as to extend along the protruding portion of the front end surface of the cutting portion 1112 and the side surface of the second cutting portion 1112 . By making the contour line of the cutting edge 12 more complex, it is possible to satisfy more stringent requirements for machining accuracy and increase cutting capability.

Between the front end surface and the side surface of the first cutting portion 1111 , between the first cutting portion 1111 and the second cutting portion 1112 , and between the second cutting portion 1112 , in order to prevent the workpiece from slipping during the machining process. A circular transition connection is adopted between the front end surface and the side surface. As can be seen by referring specifically to FIG. The formed cutting edge 12 becomes a spline curve connected by a plurality of stages of arcs and straight lines, making the shape of the cutting edge 12 more complicated, and can be applied to fragile parts of processing materials.

Preferably, in the present embodiment, a cooling groove 14 is installed at the center of the front end surface of the cutting body 11 , and the first end of the cutting edge 12 is installed at the outer edge of the cooling groove 14 . . The cooling groove 14 can cool the cutting edge 12 to effectively reduce the thermal damage of the cutting edge 12, and the cooling groove 14 is installed in the central portion of the front end surface of the cutting body 11, so that the cooling groove 14 can be made more uniform to obtain an ideal cooling effect.

Furthermore, the spiral direction of the cutting edge 12 in this embodiment may be left-handed or right-handed.

Preferably, in the present embodiment, the helical angle of the cutting edge 12 is 15° to 60°, and by appropriately increasing the helical angle, the cutting force in the tool processing process can be reduced, and the impact resistance of the tool can be improved. It can prevent run-out of the cutting edge, ensure better surface finishing quality, and extend the service life of the cutting tool. Based on the helix angle described above, the strength, sharpness, cutting force, and chip discharge speed of the cutting edge 12 can all be made ideal.

Furthermore, as a preferred embodiment, the cutting body 11 of the cutting edge portion 1 has an outer diameter of 0.5 mm to 135 mm, and the number of the cutting edges 12 is determined by the width of the cutting edges 12. Cutting After the outer diameter of the body 11 is determined, the number of the cutting edges 12 increases as the width of the cutting edges 12 decreases. The width of the cutting edge 12 is 0.01 mm to 0.2 mm, the length of the cutting edge 12 is 0.1 mm to 15 mm, and the outer diameter of the cutting body 11 and the edge of the cutting edge 2 Depending on the width limitation, 3 to 150 cutting edges 12 or even more may be placed on the cutting edge portion 1 . Specifically, in the present embodiment, the width of the cutting edge 12 refers to the distance between both side surfaces of the cutting edge 12, for example, a shown in FIG. The cutting edge length 12 refers to the distance between one end of the cutting edge 12 on the side surface of the cutting body 11 and the front end surface of the cutting body 11. For example, L shown in FIGS. 4 and 5 is the cutting edge 12 is the blade length of By appropriately increasing the number of cutting edges 12, the cutting force can be evenly distributed to each cutting edge 12, so that the cutting tool can withstand greater cutting forces, resulting in higher cutting speeds and feed rates. , the cutting edge width can be reduced to increase machining accuracy, the effective range of action of the cutting edge 12 is determined by the cutting edge length, the number of suitable cutting edges 12, the cutting edge width, and By using the flute length, the cutting tool can have ideal machining accuracy and at the same time guarantee machining efficiency.

Furthermore, the range of surface roughness of the cutting edge 12 is 0.2 to 0.4 μm, and the smaller the value, the smoother the surface roughness. The cutting edge is smooth and sharp, and the surface accuracy of the workpiece to be cut is guaranteed.

Specifically, the depth of the first chip discharge groove 13 must match the width and length of the opposing cutting edge 12, and based on the width and length of the cutting edge 12 described above, the first 1. By setting the groove depth of the chip discharge groove 13 preferably to 0.05 mm to 0.3 mm, the machining accuracy and machining effect are further improved, the machining efficiency is increased, and at the same time the service life of the cutting tool is extended. You can extend it.

In a specific embodiment, the wiper blade 17 described above has a blade length of 0.01 mm to 3 mm. It refers to the projected length b along the radial direction.

In order to increase the chip discharge efficiency and improve the machining efficiency of the cutting tool, the cutting body 11 is provided with a number of spiral second chip discharge grooves 15 opposite to the direction of the cutting edge 12. , the second chip discharging grooves 15 extend from the front end surface of the cutting body 11 to its side surfaces, and each of the second chip discharging grooves 15 is installed along the central axis circumferential direction of the cutting body 11. . Said second chip flute 15 divides each said cutting edge 12 into several steps, as can be seen in particular with reference to FIG.

Specifically, the relevant parameters of the second chip discharge groove 15 are consistent with the parameters of the cutting edge 12 described above, and the specific parameters of the second chip discharge groove 15 in this embodiment are preferably the second chip The spiral angle of the discharge groove 15 is 20° to 40°, the interval between two adjacent second chip discharge grooves 15 is 0.25 mm to 0.75 mm, and the second chip discharge groove 15 The groove depth is smaller than or equal to the width of the cutting edge, specifically 0.05 mm to 0.15 mm.

The cutting edge portion 1 further includes a base portion 16, which is fixedly connected to the rear end surface of the cutting body 11, and the material of the base portion 16 is a tungsten carbide-based cemented carbide. be. To give an example, the specific forming process of the cutting edge portion 1 is as follows. , sintered on the base 16 at high pressure (50,000 to 100,000 pieces at atmospheric pressure) to form the cutting body 11, then removed the material and processed to form the cutting edge 12 on the outer surface of the cutting body 11. do.

A second aspect of this embodiment further provides a cutting tool, and with particular reference to FIGS. The tool shank 2 is connected to the rear end face of the cutting body 11 , comprising part 1 . By including said cutting edge 1 described above, as an integrated PCD cutting tool, it has all the beneficial effects of the cutting edge 1 described above and will not be repeated here.

Preferably, the material of the tool shank 2 is a tungsten carbide-based cemented carbide, the cutting edge portion 1 further includes a base portion 16, and the material of the base portion 16 is a tungsten carbide-based cemented carbide, The base portion 16 is fixedly connected to the rear end surface of the cutting body 11 . The tool shank 2 is vacuum welded to the rear end surface of the base 16 . Therefore, since the base 16 of the cutting edge 1 and the tool shank 2 are manufactured using the same tungsten carbide-based cemented carbide, they have the same material properties, and the amount of deformation during welding of the base 16 and the tool shank 2 is reduced. The closeness can make the weld structure stability more ideal and guarantee the weld strength.

By way of example, the base 16 and the tool shank 2 are formed by welding via a silver brazing layer. The silver brazing layer is formed by hardening the silver brazing material, which is melted in the welding process to achieve the connection between the base 16 and the tool shank 2, and fix them after hardening. Specifically, silver brazing materials are formed by combining silver with other alloys using silver as a base material. In this embodiment, due to the installation of the silver brazing welding layer, the tool shank 2 and the base 16 can have a better welding fixation effect.

For example, the tungsten carbide-based cemented carbide used in the base 16 and the tool shank 2 is a sintered material composed of a hard phase of tungsten carbide and a metal cohesive phase. Furthermore, the mass percentage of cobalt in the sintered material does not exceed 12%.

In a specific embodiment, the profile of the cutting tool is less than 0.01 mm. Here, the degree of contour refers to the variation of the measured actual contour with respect to the ideal contour, and may or may not have a reference. By limiting the profile of the cutting tool, the cutting tool can have better machining accuracy and machining effect.

A third aspect of preferred embodiments of the present invention further provides an ultrasonic tool assembly comprising said cutting tool as described above, and including said cutting tool so as to have all the beneficial effects of said cutting tool. , will not be repeated here.

[Embodiment 1]
A specific embodiment provides a cutting tool, wherein said cutting edge portion 1 comprises 60 said cutting edges 12 .

Use the existing snap-in PCD cutting tools (including 3 cutting edges) and diamond grinding head (600#) to process glass with the above cutting tools under the above mentioned cutting edge 12 quantity limit. A comparison with the parameters and service life is shown in the table below.

Under the above-described cutting edge 12 quantity limit, the above cutting tool is used to machine ceramic workpieces, and the existing snap-in PCD cutting tool (including 3 cutting edges) and diamond grinding head (600#) The following table compares the usage parameters and service life of

Under the quantity limit of the cutting edge 12 described above, the above cutting tool is used to end face finish the sapphire, and the existing snap-in PCD cutting tool (including 3 cutting edges) and diamond grinding head (600#) The following table compares the usage parameters and service life of

As can be seen from the above three tables, the cutting tool of the present embodiment, based on the above-described limiting condition of the cutting edge 12, is the cutting tool of the present embodiment when processing glass, ceramic, and sapphire parts. Compared with snap-in PCD cutting tools and commonly used diamond grinding heads, the machining effect is better, the machining efficiency is higher, and the service life is longer.

[Embodiment 2]
Specific Embodiment 2 provides a cutting tool, the cutting edge portion 1 includes 70 cutting edges 12, the spiral angle of the cutting edge 12 is 58°, the edge width of the cutting edge 12 is is 0.10 mm, the blade length of the cutting edge 12 is 2 mm, and the surface roughness of the cutting edge 12 is 0.3 μm. The groove depth of the first chip discharging groove 13 is 0.10 mm. The spiral angle of the second chip discharge groove 15 is 26°, the groove depth of the second chip discharge groove 15 is 0.10 mm, and the interval between two adjacent second chip discharge grooves 15 is , 0.55 mm.

Based on the limiting conditions of the parameters described above, the cutting tool of the present embodiment can achieve relatively excellent machining accuracy and machining effect, and the machining efficiency is further improved. Higher and longer service life than traditional hard alloy cutting tools and existing snap-in PCD cutting tools.

[Embodiment 3]
This specific embodiment provides a cutting tool comprising 80 cutting edges 12, the helix angle of the cutting edges 12 is 52°, the edge width of the cutting edges 12 is 0.06 mm, The edge length of the blade 12 is 1.6 mm, and the surface roughness of the cutting edge 12 is 0.2 μm. The groove depth of the first chip discharge groove 13 is 0.08 mm. The spiral angle of the second chip discharge groove 15 is 22°, the groove depth of the second chip discharge groove 15 is 0.08 mm, and the interval between two adjacent second chip discharge grooves 15 is , 0.40 mm.

According to the above parameters, the cutting tool of the embodiment of the present invention has better machining effect, higher machining accuracy, higher machining efficiency, and longer service life than traditional. Much longer than hard alloy cutting tools and existing snap-in PCD cutting tools.

[Embodiment 4]
This embodiment provides a cutting tool comprising 64 cutting edges 12, the helical angle of the cutting edges 12 is 66°, the edge width of the cutting edges 12 is 0.14 mm, and the cutting edges 12 are The blade length is 2.8 mm, and the surface roughness of the cutting edge 12 is 0.36 μm. The groove depth of the first chip discharging groove 13 is 0.12 mm. The spiral angle of the second chip discharge groove 15 is 38°, the groove depth of the second chip discharge groove 15 is 0.12 mm, and the interval between two adjacent second chip discharge grooves 15 is , 0.65 mm.

According to the above parameters, the cutting tool of the embodiment of the present invention has better machining effect, higher machining accuracy, higher machining efficiency, and longer service life than traditional. Much longer than hard alloy cutting tools and existing snap-in PCD cutting tools.

As described above, the embodiment of the present invention provides a cutting tool, a cutting edge 1, and an ultrasonic tool assembly including the cutting tool, the material of the cutting edge portion 1 of the cutting tool is polycrystalline diamond, and Several cutting edges 12 are installed on the outer surface of the cutting body 11 by integral molding to form the cutting edge portion 1, so that the cutting body 11 with the same outer diameter as the existing snap-in PCD cutting tools. More cutting edges 12 can be installed on the cutting edge 12, and the design of the type and structure of the cutting edge 12 is further diversified. can be improved, thereby improving the machining accuracy of the cutting tool and extending the service life. In addition, by installing several helical cutting edges 12 on the surface of the cutting edge portion 1 along the circumferential direction of its central axis, it is possible to adapt to higher rotational speeds and cutting depths, thereby , can increase the processing efficiency.

The above are merely preferred embodiments of the present invention, and those of ordinary skill in the art may further make some modifications and replacements on the premise that they do not depart from the technical principles of the present invention. It should be pointed out that these modifications and replacements should also be regarded as the protection scope of the present invention.

1: cutting edge
2: Tool shank
11: cutting body
12: cutting edge
13: First chip discharge groove
14: Cooling groove
15: Second chip discharge groove
16: Base
17: wiper blade
111: cutting body end
112: connection part
1111: First cutting part
1112: Second cutting part

Claims (16)

A cutting edge used for a cutting tool,
The material of the cutting edge is polycrystalline diamond,
wherein said cutting edge portion comprises an integrally molded cutting body and several cutting edges;
The cutting edge is helical,
Each cutting edge is installed on the outer surface of the cutting body along the circumferential direction of the central axis of the cutting body, and a first chip discharge groove is installed between two adjacent cutting edges,
Since the first end of the cutting edge is located on the front end face of the cutting body, and the cutting edge extends along the front end face of the cutting body and the side surface of the cutting body in turn, the cutting edge is a second end located on the side of the cutting body;
further comprising a wiper blade integrally formed on the cutting body;
A cutting edge portion in which the wiper edge is located at a first end of the cutting edge and transitions smoothly with the cutting edge. wherein said cutting body comprises a cutting body end and a connecting portion fixedly connected via one end face;
A first end of the cutting edge is located on the front face of the cutting body end, and the cutting edge extends in turn along the front face of the cutting body end and the side of the cutting body end. Therefore, the second end of the cutting edge is located on the side surface of the end of the cutting body, and the second end of the cutting edge is located at the connecting portion between the end of the cutting body and the connecting part. Item 1. The cutting edge portion according to Item 1. wherein said cutting body end comprises a coaxial and fixedly connected first cutting portion and a second stepped cutting portion;
The cutting edge portion according to claim 2 , wherein the outer diameter of the first cutting portion is smaller than the outer diameter of the second cutting portion, and the second cutting portion and the connecting portion are fixedly connected. Between the front end surface of the first cutting portion and its side surface, between the first cutting portion and the second cutting portion, and between the front end surface of the second cutting portion and its side surface, all employ arc transition connections. The cutting edge portion according to claim 3 . A cooling groove is installed in the central portion of the front end face of the cutting body,
2. The cutting edge according to claim 1, wherein the first end of said cutting edge is located at the outer edge of said cooling groove. The spiral direction of the cutting edge is left-handed or right-handed,
The cutting edge according to claim 1, wherein the cutting edge has a spiral angle of 15° to 60°. The cutting body has an outer diameter of 0.5 mm to 135 mm,
The number of teeth of the cutting edge is determined by the width of the cutting edge,
The blade width of the cutting edge is 0.01 mm to 0.2 mm,
The cutting edge portion according to claim 1, wherein the cutting edge has a cutting edge length of 0.1 mm to 15 mm. The cutting edge according to claim 7 , wherein the first chip discharge groove has a groove depth of 0.05 mm to 0.3 mm. The cutting edge portion according to claim 1 , wherein the wiper blade has a blade length of 0.01 mm to 3 mm. a number of helical secondary chip evacuation grooves opposite to the direction of the cutting edge are provided on the cutting body;
The second chip discharge groove extends from the front end surface of the cutting body to its side surface,
Each of the second chip discharge grooves is installed along the circumferential direction of the central axis of the cutting body,
2. The cutting edge portion of claim 1, wherein said second chip flute divides each said cutting edge into several stages. The cutting edge according to claim 10 , wherein the second chip discharge groove has a spiral angle of 20° to 40°. The interval between the two second chip discharge grooves adjacent to each other is 0.25 mm to 0.75 mm,
The cutting edge according to claim 10 , wherein the second chip discharge groove has a groove depth of 0.05 mm to 0.15 mm. further comprising a base;
The base is fixedly connected to the rear end surface of the cutting body,
The cutting edge portion according to any one of claims 1 to 12 , wherein the material of the base portion is a tungsten carbide-based cemented carbide. comprising a tool shank and the cutting edge portion according to any one of claims 1 to 13 attached to the front end of the tool shank,
A cutting tool, wherein the tool shank is connected to the rear end surface of the cutting body. The material of the tool shank is a tungsten carbide-based cemented carbide,
The cutting edge further includes a base,
The base is fixedly connected to the rear end surface of the cutting body,
The material of the base is a tungsten carbide-based cemented carbide,
15. The cutting tool of claim 14 , wherein the tool shank is vacuum welded to the rear end face of the base. An ultrasonic tool assembly comprising a cutting tool according to claim 14 or 15 .

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