CN220636403U - Multi-edge drill for solid drilling process - Google Patents

Abstract

The utility model relates to a multiple-edge drill for solid drilling technology, including the cutter body, the cutter body includes a plurality of main cutting edges, a plurality of chip groove and a plurality of chip groove, and the cutter body has terminal surface and outer wall, and terminal surface and outer wall enclose into the cylinder structure jointly, and main cutting edge, chip groove and chip groove set up in the terminal surface, and the chip groove sets up between main cutting edge and chip groove, and the tank bottom of chip groove is circular-arc, and the main cutting edge is the wave form sword. The wave-shaped blade is beneficial to reducing the processing resistance of the multi-blade drill in solid drilling and optimizing the centering effect of the drill bit of the multi-blade drill, thereby effectively solving the problems that the processing load of the linear cutting edge of the traditional multi-blade drill in solid drilling is large and the chip is not easy to break; the circular arc-shaped chip flute has a larger chip removal space, so that the problem that chip removal is not smooth when a multi-edge drill is used for solid drilling is effectively solved, and the circular arc-shaped chip flute can also roll chips on the cut scrap iron, so that the scrap iron deforms, and the chip breaking effect is achieved.

Description

Multi-edge drill for solid drilling process

Technical Field

The present application relates to the field of hole machining tools, and in particular to multi-edged drills for solid drilling processes.

Background

With the development of the hole processing cutter technology, a three-blade drilling technology appears, and at present, three-blade drilling is mostly used in a hole reaming process of a hole, but when the three-blade drilling is applied to a solid drilling process, because the space of a drill point chip flute of the three-blade drilling is too small, phenomena of chip extrusion and poor chip removal are easy to occur in the solid drilling process, and the drill point of the three-blade drilling is too blunt, so that the centering effect is poor in the solid drilling process, and the three-blade drilling is difficult to be applied to the solid drilling process.

Disclosure of Invention

Based on this, it is necessary to provide a multi-blade drill for a solid drilling process in order to solve the problem that the multi-blade drill is difficult to be applied to the solid drilling process.

A multi-edge drill for a solid drilling process, the multi-edge drill for a solid drilling process comprising a cutter body, the cutter body comprising a plurality of main cutting edges, a plurality of chip grooves and a plurality of chip grooves, the cutter body having an end face and an outer wall face, the end face and the outer wall face together enclosing a cylindrical structure, the multi-edge drill for a solid drilling process having a first diameter, the first diameter being the diameter of the end face, the first diameter being D; the main cutting edge, the chip grooves and the chip grooves are arranged on the end face, the circle center of the end face is taken as the center, a plurality of main cutting edges form a fixed angle, a plurality of chip grooves form a fixed angle, the chip grooves are arranged between the main cutting edges and the chip grooves, the bottoms of the chip grooves are arc-shaped, and the main cutting edges are waveform edges.

According to the technical scheme, the machining resistance in the machining process of the solid drilling is larger than that of the reaming process, the main cutting edge of the multi-edge drilling used for the solid drilling process is a waveform edge, the waveform edge enables the inclination angles of each point edge of the main cutting edge, the working rake angle and the borne cutting load to be different, and the waveform edge enables the tooth pitches in the same end section to be different, so that the periodicity of cutting force variation is greatly reduced, the cutting process is stable, the reduction of the machining resistance in the machining process of the solid drilling is facilitated, the centering effect of the drill bit of the multi-edge drilling is optimized, and the problems that the machining load of the linear cutting edge of the traditional multi-edge drilling in the machining process of the solid drilling is large and chip breakage is difficult are effectively solved; the chip removal amount in the processing process of the solid drilling hole is larger than that of the reaming process, the chip groove is arranged between the main cutting edge and the chip groove, the bottom of the chip groove is arc-shaped, the arc-shaped chip groove has larger chip removal space, the processing quality problem caused by unsmooth chip removal in the processing process of the solid drilling hole can be effectively solved, and the arc-shaped chip groove can also roll the chip removed in the processing process of the solid drilling hole, so that the chip is deformed, and the chip breaking effect is achieved.

In one embodiment, the waveform edge has an R angle controlling the magnitude of the waveform, the magnitude of the R angle being 25% d.

Through the technical scheme, when the size of the R angle is one-fourth of the end face diameter, the intersection of the two sections of cutting edges of the waveform cutting edge for forming the waveform can form a smooth edge shape, and the cutting edges at the two ends are prevented from intersecting to form a sharp point.

In one embodiment, the cutter body further comprises an end edge intersecting the main cutting edge and forming a drill tip of the multi-edge drill for solid drilling process, the drill tip having a first angle with a magnitude of 110 °.

Through the technical scheme, the drill point formed by the end edge and the main cutting edge plays a role in centering when being used for a solid drilling process, when the first angle is too small, the main cutting edge contacts a workpiece earlier than the drill point when the multi-edge drill for the solid drilling process cuts a micro drill, the chipping is easy to cause, and the first angle of the drill point is set to be 110 degrees, so that the phenomenon of chipping is avoided.

In one embodiment, the multi-edge drill for solid drilling process further has a second diameter, the second diameter is 27% d, the apex of the R angle falls on the circumference of the circle in which the second diameter is located, and the end point of the corner edge forming the first angle falls on the circumference of the circle in which the second diameter is located.

In one embodiment, the main cutting edge is formed with a drill cutting edge angle having a second angle of 140 °.

Through the technical scheme, the cutting edge angle of the drill bit of the main cutting edge plays a role in cutting workpiece materials in a solid drilling process.

In one embodiment, along the axial direction of the cylindrical structure, the cutter body further comprises a plurality of cutter grooves formed in the outer wall surface along a plurality of spiral lines, and the starting points of the spiral lines are sequentially arranged along the circumferential direction of the end surface.

According to the technical scheme, in the solid drilling process, along with the continuous deep cutting drilling of the multi-edge drill for the solid drilling process, the cut scrap iron is discharged through the cutter groove, the cutter groove forms the front cutter surface of the multi-edge drill for the solid drilling process, and the space for chip removal, chip containing and cutting fluid inflow is formed.

In one embodiment, along the axial direction of the cylindrical structure, the cutter body further includes a plurality of peripheral edges disposed along a plurality of the spiral lines on the outer wall surface, and the plurality of peripheral edges are formed on the groove walls of the plurality of cutter grooves.

Through the technical scheme, in the process that the multi-edge drill for the solid drilling process continuously penetrates into the workpiece to cut the drill, the peripheral edge serves as the auxiliary cutting edge of the multi-edge drill for the solid drilling process, and the multi-edge drill for the solid drilling process is guided to continuously penetrate into the hole and the hole wall is polished in the process of the solid drilling.

In one embodiment, the multi-edge drill for solid drilling process further comprises a tool shank connected with the tool body, wherein the tool shank and the tool body are in a coaxial cylinder structure with a common axis as a center.

Through the technical scheme, the multi-blade drill for the solid drilling process is installed on the driving device through the tool handle so as to perform solid drilling.

In one embodiment, the substrate of the multi-edge drill for the solid drilling process is hard alloy, the multi-edge drill surface for the solid drilling process is provided with a composite coating, the composite coating comprises a first coating and a second coating which are sequentially arranged on the multi-edge drill surface for the solid drilling process, the first coating is made of AlCrN-based, and the second coating is made of TiN.

Through the technical scheme, the bonding degree between the AlCrN-based first coating and the matrix (hard alloy) of the multi-edge drill used for the solid drilling process is high, and the AlCrN-based coating has good high temperature resistance and wear resistance; however, the anti-adhesion performance of the first coating made of AlCrN-based material is poor, so that the friction coefficient in the cutter groove and the chip groove is easy to be increased, the risk of unsmooth chip removal and even broken cutters during processing is provided, therefore, the second coating made of TiN is added on the first coating made of AlCrN-based material, and the second coating made of TiN and the first coating made of AlCrN-based material have better adhesion performance, so that the second coating made of TiN is ensured not to fall off, and meanwhile, the second coating made of TiN has good lubricity to improve the problem of dryness of the cutter groove and the chip groove, thereby being beneficial to prolonging the service life of the multi-edge drill for the solid drilling process.

In one embodiment, the number of main cutting edges, chip flutes and chip flutes is three.

In the technical scheme, the machining resistance in the machining process of the solid drilling hole is larger than that of a reaming process, the main cutting edge of the multi-edge drilling hole used for the solid drilling hole process is a waveform edge, the waveform edge enables the inclination angles of each point edge of the main cutting edge, the working rake angle and the borne cutting load to be different, and the waveform edge enables the tooth pitch in the section of the same end to be different, so that the periodicity of cutting force change is greatly reduced, the cutting process is stable, the machining resistance of the multi-edge drilling hole is reduced in the machining process of the solid drilling hole, the centering effect of the multi-edge drilling hole is optimized, and the problems that the machining load of the linear cutting edge of the traditional multi-edge drilling hole in the machining process of the solid drilling hole is large and chip breakage is difficult to occur are effectively solved; the chip removal amount in the processing process of the solid drilling hole is larger than that of the reaming process, the chip groove is arranged between the main cutting edge and the chip groove, the bottom of the chip groove is arc-shaped, the arc-shaped chip groove has larger chip removal space, the processing quality problem caused by unsmooth chip removal in the processing process of the solid drilling hole can be effectively solved, and the arc-shaped chip groove can also roll the chip removed in the processing process of the solid drilling hole, so that the chip is deformed, and the chip breaking effect is achieved.

Drawings

Fig. 1 is a schematic view of a multi-edge drill for a solid drilling process according to an embodiment of the present application.

Fig. 2 is a schematic view of a partial enlarged structure at a in fig. 1.

Fig. 3 is a schematic diagram showing the structure of the main cutting edge (a) of an embodiment of the multi-edge drill for solid drilling process and the main cutting edge (b) of a conventional drill.

Fig. 4 is a schematic diagram showing the comparison of the chip flute (c) of an embodiment of the multi-edge drill for solid drilling process and the chip flute (d) of a conventional drill.

Component reference numerals in the drawings illustrate:

1000. multiple-edge drills for solid drilling processes; 100. a cutter body; 200. a knife handle; 110. an end face; 120. an outer wall surface; 130. a first diameter; 140. a second diameter; 150. a first angle; 160. a second angle; 170. r is an angle; 111. a main cutting edge; 112. a chip removal groove; 113. chip-containing grooves; 114. an end blade; 121. a knife slot; 122. a peripheral edge; 111', main cutting edge (comparative); 113', chip flutes (comparative).

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Referring to fig. 1 and 2, fig. 1 shows a schematic structural view of an embodiment of a multi-edge drill 1000 applied for a solid drilling process, and fig. 2 shows a schematic partial enlarged structural view at a in fig. 1. The application proposes a multi-edge drill 1000 for a solid drilling process, the multi-edge drill 1000 for the solid drilling process comprises a cutter body 100, the cutter body 100 comprises a plurality of main cutting edges 111, a plurality of chip grooves 112 and a plurality of chip grooves 113, the cutter body 100 is provided with an end face 110 and an outer wall face 120, the end face 110 and the outer wall face 120 jointly enclose a cylindrical structure, the multi-edge drill 1000 for the solid drilling process is provided with a first diameter 130, the first diameter 130 is the diameter of the end face 110, and the first diameter 130 is D; the main cutting edge 111, the chip grooves 112 and the chip grooves 113 are provided on the end surface 110, a fixed angle is formed between the plurality of main cutting edges 111 with the center of the end surface 110 as the center, a fixed angle is formed between the plurality of chip grooves 112, a fixed angle is formed between the plurality of chip grooves 113, the chip grooves 113 are provided between the main cutting edge 111 and the chip grooves 112, the bottom of the chip grooves 113 is arc-shaped, and the main cutting edge 111 is a wave-shaped edge.

Referring to fig. 3 and 4, fig. 3 is a schematic diagram showing a comparison of the structure of the main cutting edge 111 of an embodiment of the multi-edge drill 1000 for a solid drilling process with the main cutting edge (comparison) 111 'of a conventional drill, and fig. 4 is a schematic diagram showing a comparison of the structure of the chip flute 113 of an embodiment of the multi-edge drill 1000 for a solid drilling process with the chip flute (comparison) 113' of a conventional drill. The main cutting edge 111 of the multi-edge drill 1000 used for the solid drilling process is a waveform blade (see a), the waveform blade enables the inclination angles of each point edge of the main cutting edge 111, the working rake angles and the borne cutting loads to be different, and the waveform blade enables the tooth pitches in the section of the same end to be different, so that the periodicity of cutting force variation is greatly reduced, the cutting process is stable, the reduction of the machining resistance of the multi-edge drill in the solid drilling process is facilitated, the centering effect of the drill of the multi-edge drill is optimized, and the problems that the linear cutting edge (see b) of the traditional multi-edge drill is large in machining load and difficult to break in the solid drilling process are effectively solved; the chip removal amount in the processing process of the solid drilling hole is larger than that of the reaming process, the chip flute 113 is arranged between the main cutting edge 111 and the chip flute 112, the bottom of the chip flute 113 is arc-shaped (see c), the arc-shaped chip flute 113 has larger chip removal space, the processing quality problem caused by unsmooth chip removal in the processing process of the solid drilling hole can be effectively solved by the chip flute (contrast) 113' (see d) of the traditional multi-edge drilling hole, and the arc-shaped chip flute 113 can also roll the chip removed in the processing process of the solid drilling hole, so that the chip is deformed, and the chip breaking effect is achieved.

The number of the main cutting edge 111, the chip flute 113, and the chip groove 112 is determined according to practical applications, and is not particularly limited herein. Illustratively, the number of main cutting edges 111, chip flutes 113, and chip flutes 112 is three.

A circular arc-shaped chip flute 113 is cut between the main cutting edge 111 and the chip flute 112 by using a forming grinding wheel, and the chip containing space is enlarged.

Referring to fig. 2, the waveform edge has an R angle 170 that controls the magnitude of the waveform, the magnitude of R angle 170 being 25% d. When the R angle 170 is one-fourth the diameter of the end face 110, the intersection of the two cutting edges of the waveform edge for forming the waveform will form a smooth edge shape, so as to avoid the cutting edges at the two ends from intersecting to form a sharp point.

Referring to fig. 2, the tool body 100 further includes an end edge 114, the end edge 114 intersecting the main cutting edge 111 and forming a drill tip of the multi-edge drill 1000 for a solid drilling process, the drill tip having a first angle 150, the first angle 150 having a magnitude of 110 °. The drill tip formed by the end edge 114 and the main cutting edge 111 plays a role in centering when being used for a solid drilling process, when the first angle 150 is too small, the main cutting edge 111 contacts a workpiece earlier than the drill tip when the multi-edge drill 1000 for the solid drilling process is used for micro-drilling cutting, chipping is easy to cause, and the first angle 150 of the drill tip is set to be 110 degrees, so that the phenomenon of chipping is avoided.

Referring to fig. 2, the multi-edge drill 1000 for the solid drilling process further has a second diameter 140, the second diameter 140 having a size of 27% d, the apex of the r-angle 170 falling on the circumference of the circle in which the second diameter 140 is located, and the end of the corner edge forming the first angle 150 falling on the circumference of the circle in which the second diameter 140 is located. The main cutting edge 111 is formed with a drill cutting edge angle having a second angle 160, the second angle 160 being 140 °. The bit cutting edge angle of the main cutting edge 111 plays a role in cutting the workpiece material in a solid drilling process.

Referring to fig. 1, in the axial direction of the cylindrical structure, the cutter body 100 further includes a plurality of cutter grooves 121 formed along a plurality of spiral lines on the outer wall surface 120, and starting points of the plurality of spiral lines are sequentially formed along the circumferential direction of the end surface 110. In the solid drilling process, as the multi-edge drill 1000 for the solid drilling process continuously penetrates into the workpiece to cut and drill holes, the cut scrap iron is discharged through the cutter groove 121, the cutter groove 121 forms the front cutter surface of the multi-edge drill 1000 for the solid drilling process, and a space for removing chips, containing the chips and flowing in cutting fluid is formed.

Referring to fig. 1, in the axial direction of the cylindrical structure, the cutter body 100 further includes a plurality of peripheral edges 122 disposed along a plurality of spiral lines on the outer wall surface 120, and the plurality of peripheral edges 122 are formed on the groove walls of the plurality of cutter grooves 121. The number of the pockets 121 and the peripheral edges 122 is determined according to practical applications, and is not particularly limited herein. Illustratively, the number of sipes 121 and peripheral edges 122 is three. The peripheral edge 122 serves as a secondary cutting edge of the multi-edge drill 1000 for the solid drilling process in the process of cutting the drill holes continuously deep into the workpiece, and plays a role in guiding the multi-edge drill 1000 for the solid drilling process to continuously deeply drill holes and polishing the hole walls in the process of solid drilling.

Referring to fig. 1, the multi-edge drill 1000 for the solid drilling process further includes a shank 200, the shank 200 being connected to the tool body 100, the shank 200 and the tool body 100 having a coaxial cylinder structure centered on a common axis. The multi-blade drill 1000 for the solid drilling process is mounted on a driving device through the tool shank 200 to perform solid drilling.

Preferably, the substrate of the multi-edge drill 1000 used for the solid drilling process is hard alloy, the surface of the multi-edge drill 1000 used for the solid drilling process is provided with a composite coating, the composite coating comprises a first coating and a second coating which are sequentially arranged on the surface of the multi-edge drill 1000 used for the solid drilling process, the first coating is AlCrN-based, and the second coating is TiN. The first coating of AlCrN-based material has high adhesion with the substrate (hard alloy) of the multi-blade drill 1000 used in the solid drilling process, and the coating of AlCrN-based material has good high temperature resistance and wear resistance; however, the poor anti-adhesion of the first coating of the AlCrN-based material easily results in a higher friction coefficient in the tool slot 121 and the chip removal slot 112, and has the risk of unsmooth chip removal and even broken tools during processing, so that the second coating of the TiN material is added on the first coating of the AlCrN-based material, and has better adhesion performance with the first coating of the AlCrN-based material, so as to ensure that the second coating of the TiN material cannot fall off, and meanwhile, the second coating of the TiN material has good lubricity to improve the problem of dryness of the tool slot 121 and the chip removal slot 112, thereby being beneficial to prolonging the service life of the multi-edge drill 1000 for the solid drilling process.

In the technical scheme of the application, the machining resistance in the machining process of the solid drilling is larger than that of a reaming process, the main cutting edge 111 of the multi-edge drill 1000 used for the solid drilling process is a waveform edge, the waveform edge enables the inclination angle of each point edge of the main cutting edge 111, the working rake angle and the borne cutting load to be different, and the waveform edge enables the tooth pitch in the section of the same end to be different, so that the periodicity of cutting force variation is greatly reduced, the cutting process is more stable, the reduction of the machining resistance in the machining process of the solid drilling is facilitated, the centering effect of the drill bit of the multi-edge drill is optimized, and the problems that the machining load of the linear cutting edge of the traditional multi-edge drill in the machining process of the solid drilling is large and the chip is not easy to break are effectively solved; the chip removal amount in the processing process of the solid drilling hole is larger than that of the reaming process, the chip flute 113 is arranged between the main cutting edge 111 and the chip flute 112, the bottom of the chip flute 113 is arc-shaped, the arc-shaped chip flute 113 has larger chip removal space, the processing quality problem caused by unsmooth chip removal in the processing process of the solid drilling hole can be effectively solved, and the arc-shaped chip flute 113 can also roll chips of the cut scrap iron in the processing process of the solid drilling hole, so that the scrap iron deforms, and the chip breaking effect is achieved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. The multi-edge drill for the solid drilling process is characterized by comprising a cutter body, wherein the cutter body comprises a plurality of main cutting edges, a plurality of chip grooves and a plurality of chip flutes, the cutter body is provided with an end face and an outer wall face, the end face and the outer wall face jointly enclose a cylindrical structure, the multi-edge drill for the solid drilling process is provided with a first diameter, the first diameter is the diameter of the end face, and the first diameter is D; the main cutting edge, the chip grooves and the chip grooves are arranged on the end face, the circle center of the end face is taken as the center, a plurality of main cutting edges form a fixed angle, a plurality of chip grooves form a fixed angle, the chip grooves are arranged between the main cutting edges and the chip grooves, the bottoms of the chip grooves are arc-shaped, and the main cutting edges are waveform edges.

2. The multi-edge drill for solid drilling processes of claim 1, wherein the waveform edge has an R-angle of a controlled waveform size, the R-angle having a size of 25% d.

3. The multi-edge drill for solid drilling process of claim 2, wherein the cutter body further comprises an end edge intersecting the main cutting edge and forming a drill tip of the multi-edge drill for solid drilling process, the drill tip having a first angle, the first angle having a magnitude of 110 °.

4. A multi-edge drill for a solid drilling process according to claim 3, further having a second diameter, the second diameter being 27% d in size, the apex of the R angle falling on the circumference of the circle in which the second diameter is located, the end point of the corner edge forming the first angle falling on the circumference of the circle in which the second diameter is located.

5. The multi-edge drill for solid drilling process according to claim 1, wherein the main cutting edge is formed with a bit cutting edge angle having a second angle, the second angle having a size of 140 °.

6. The multi-edge drill for solid drilling process according to claim 1, wherein the cutter body further comprises a plurality of cutter grooves arranged along a plurality of spiral lines on the outer wall surface in the axial direction of the cylindrical structure, and a plurality of starting points of the spiral lines are arranged in sequence along the circumferential direction of the end surface.

7. The multi-edge drill for solid drilling process of claim 6, wherein the cutter body further comprises a plurality of peripheral edges along a plurality of the spiral lines on the outer wall surface in the axial direction of the cylindrical structure, the plurality of peripheral edges being formed at the groove walls of the plurality of cutter grooves.

8. The multi-edge drill for solid drilling processes of claim 1, further comprising a shank connected to the cutter body, the shank and the cutter body being in a coaxial cylinder configuration centered on a common axis.

9. The multi-edge drill for solid drilling process according to claim 1, wherein the substrate of the multi-edge drill for solid drilling process is hard alloy, the multi-edge drill surface for solid drilling process is provided with a composite coating, the composite coating comprises a first coating and a second coating which are sequentially arranged on the multi-edge drill surface for solid drilling process, the first coating is AlCrN-based, and the second coating is TiN.

10. The multi-edge drill for a solid drilling process of claim 1, wherein the number of main cutting edges, chip flutes, and chip flutes is three.