WO2022027236A1

WO2022027236A1 - High-speed milling cutter

Info

Publication number: WO2022027236A1
Application number: PCT/CN2020/106836
Authority: WO
Inventors: 仵永博; 肖旭凯; 高江雄; 陈胜男
Original assignee: 株洲华锐精密工具股份有限公司
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2022-02-10

Abstract

Disclosed is a high-speed milling cutter, comprising a cutter body (1), a cutter groove (1a), a cutter holder (2), a driving screw (3) and an auxiliary compression screw (4). The cutter groove (1a) is provided with a cutter groove axial face (11), a cutter groove radial face (12), a first cutter groove tangential face (13) and a second cutter groove tangential face (14); the cutter holder (2) is provided with a cutter holder axial face (21), a cutter holder radial face (22), a first cutter holder tangential face (23) and a second cutter holder tangential face (24); the first cutter holder tangential face (23) and the second cutter holder tangential face (24) are oppositely arranged and mutually inclined to form an acute angle a; the cutter holder (2) is divided into a fixed portion (26) and an elastic portion (27) by at least one slit (25); the fixed portion (26) is provided with a cutting portion (28); a driving screw hole (29) is provided in the fixed portion (26); and the cutter holder (2) moves in the cutter groove (1a) by means of the driving screw (3) cooperating with the driving screw hole (29). The cutter has a rational structural design and is convenient to adjust, and since the structure of the cutter is stable, the cutter does not fly out under a force; in addition, the elastic portion of the cutter holder can provide an effect similar to "damping", such that the small vibration of the cutter holder during cutting is reduced, and the service life of the cutter is prolonged.

Description

High Speed Milling Tool

technical field

The invention relates to the technical field of milling tools, in particular to a high-speed milling tool.

Background technique

With the advancement of cutting technology, milling cutters equipped with welded PCD cartridges are widely used in high-speed milling of aluminum alloys. A cutting unit that can be adjusted axially in the outer groove of the tool body; wherein, each cutting unit includes the following structures: a cutting tool holder, a pressing unit and an adjusting unit; in order to ensure the cutting effect of the tool, such tools are used before machining. It is necessary to adjust the axial height of each tool holder to ensure the accuracy. The adjustment sequence is: 1. The adjustment unit roughly adjusts the cutting tool holder to the initial predetermined height; 2. The pressing unit preloads; 3. The adjustment unit precisely adjusts the cutting tool holder to the final height. height; 4. The pressing unit is finally pressed; for example, patents CN101505895A, CN1929945A, CN200980159145.3, WO2004087358A2 show such tools.

The structure of this kind of tool is complex. In the prior art, the cutting tool holder, the pressing unit and the adjusting unit are independent components, which are assembled in the tool groove through a specific assembly relationship, and are prone to loosening during high-speed cutting; at the same time, in order to ensure When the tool body rotates at a high speed, it can provide a reliable enough pressing force for the tool holder. The pressing unit needs to be strong enough or complex, so it is often set to a larger size. Correspondingly, the matching tool holder or tool body needs to be Provide enough space to accommodate the pressing unit, which will often weaken the strength of the tool holder or the tool body, occupy the limited space of the tool body, and reduce the cutting effect and life of the tool; under the existing technical conditions, the pressing unit must be Preloading, the operation steps are complicated, and the adjustment takes a long time; at the same time, this kind of tool can only be adjusted in one direction. When the adjustment height exceeds the predetermined height, it cannot be recalled, and the tool holder can only be released to the initial position and readjusted. Similar steps in the assembly process The adjustment time will be prolonged; at the same time, in order to ensure the stability of preload and compression, a special torque wrench is often required, and the adjustment method is complicated; when the tool rotates at high speed, the assembly will loosen or the compression structure will fail due to cutting vibration. The clamping, pressing unit and adjusting unit may fly out of the cutter body under the action of centrifugal force.

SUMMARY OF THE INVENTION

The present invention provides a high-speed milling tool, which aims to solve the problems of complex structure of the existing tool, long adjustment time, unstable structure of high-speed rotation of the tool, and the like.

In order to achieve the above object, an embodiment of the present invention provides a high-speed milling tool, comprising:

a cutter body, the cutter body is a disc-shaped cutter body, and a plurality of cutter grooves are arranged on the cutter body, and the cutter grooves are used for installing a cutting unit; the cutting unit includes a cutter holder and a driving screw; each of the The tool groove is composed of the tool groove axial surface, the tool groove radial surface, the tool groove first tangential surface and the tool groove second tangential surface, and each of the tool holders is provided with a tool holder axial surface, a tool holder The radial surface, the first tangential surface of the tool holder and the second tangential surface of the tool holder; the axial surface of the tool slot, the radial surface of the tool slot, the first tangential surface of the tool slot and the second tangential surface of the tool slot are respectively It is arranged opposite to the axial surface of the tool holder, the radial surface of the tool holder, the first tangential surface of the tool holder and the second tangential surface of the tool holder;

The first tangential surface of the tool holder and the second tangential surface of the tool holder are oppositely arranged and mutually inclined to form an acute angle a, the acute angle a shrinks toward the tool installation end face, and opens in the direction toward the tool cutting end face; the cutter The clip is divided into a fixed part and an elastic part by at least one slit. the elastic part; the fixing part is provided with a driving screw hole, and the tool holder cooperates with the driving screw hole through the driving screw and faces the cutting end face of the tool or the installation end face of the tool along the first tangential direction of the tool groove sports.

Wherein, the driving screw hole is opened toward the cutting end face of the tool, and the axis of the driving screw hole is parallel to the first tangential plane of the tool holder.

Wherein, the first tangential surface of the sipe and the second tangential surface of the sipe are parallel to each other.

Wherein, a knife groove driving screw hole is opened on the axial surface of the knife groove, the axis of the knife groove driving screw hole is parallel to the first tangential plane of the knife groove, and the axis of the driving screw hole is parallel to the knife groove. The first tangential plane of the clip is parallel, and the driving screw drives the tool holder through the driving screw hole and the knife groove driving screw hole.

Wherein, the driving screw is a double-ended screw, and both ends of the driving screw are provided with operation holes.

Wherein, the middle diameter of the head of the driving screw is smaller than the middle diameter of the tail of the driving screw, the middle diameter of the driving screw hole is smaller than the middle diameter of the driving screw hole of the knife groove; the head of the driving screw It is used for matching with the driving screw hole, and the tail of the driving screw is used for matching with the driving screw hole of the knife groove.

Wherein, the first tangential surface of the tool groove and the first tangential surface of the tool holder are provided with protrusions and depressions that cooperate with each other.

Wherein, the second tangential surface of the knife groove and the second tangential surface of the tool holder are provided with protrusions and depressions that cooperate with each other.

Wherein, the cutting unit further includes an auxiliary compression screw, the auxiliary compression screw is a countersunk head screw, and both ends of the auxiliary compression screw are provided with compression operation holes.

Wherein, auxiliary screw holes with countersunk head structure are opened on the second tangential surface of the knife groove, and the countersunk head of the auxiliary screw hole is opened on the side close to the second tangential surface of the knife groove, and the auxiliary screw hole is provided with a countersunk head structure. A tightening screw is arranged in the auxiliary screw hole.

Wherein, the second tangential surface of the tool holder is provided with a depressed pressing surface, and the pressing surface is concave in the direction toward the first tangential surface of the tool holder relative to the second tangential surface of the tool holder, so When the tool holder is installed in the tool groove, the end face of the countersunk head end of the auxiliary pressing screw abuts against the pressing surface.

The above-mentioned scheme of the present invention has the following beneficial effects:

1. The structure of the present invention is simple. Because the tool holder has the ability to elastically deform, it has the function of self-compression and shares the pressing force of the compression screw. Therefore, the auxiliary compression screw can be of smaller size and does not occupy the knife. The body space will not reduce the strength of the cutter body; the drive screw also undertakes the functions of self-compression of the drive tool holder and adjustment of the height of the tool holder, and the entire cutting unit has a compact and simple structure;

2. The adjustment of the present invention is convenient, wherein the tool holder has a self-compression function. When the tool holder is pressed under the drive of the driving screw, the tool holder is already in a pre-compressed state, and no additional pre-tightening is required; When it is completely in the tool groove, the deformation of the tool holder is fixed, the pre-tightening force of the tool holder is stable, and no additional torque wrench is required; at the same time, the drive screw can drive the tool holder to adjust in both directions, which is convenient for adjustment;

3. All the components of the present invention are located inside the cutter body, which can prevent flying out, so that the cutter can adopt a higher rotational speed, which helps to improve the cutting efficiency; when the cutter holder is pressed in the cutter groove, the cutter holder is the first The protrusions and depressions on the tangential plane and the second tangential plane are in close contact with the protrusions and depressions on the first tangential plane and the second tangential plane of the knife groove, respectively, which is equivalent to "stuck" the tool holder in the knife body. , the centrifugal force generated by the high-speed rotation of the tool is borne by the cutter body; at the same time, the countersunk head-shaped auxiliary compression screw is also located inside the cutter body, and the countersunk head structure prevents it from flying out of the cutter body;

4. The elastic part of the tool holder of the present invention can provide a component force towards the cutting end face of the tool, eliminate the gap between the driving screw thread and the thread of the tool holder matched with it, and make the adjustment more stable; at the same time, the elastic part of the tool holder can provide similar The "damping" effect reduces the tiny vibration of the tool holder during cutting and increases the tool life.

Description of drawings

Fig. 1 is the structural representation of the high-speed milling cutter of the present invention;

Fig. 2 is the schematic diagram of the tool holder structure of the high-speed milling cutter of the present invention;

Fig. 3 is the side view of the tool holder of the high-speed milling cutter of the present invention;

Fig. 4 is the front view of the tool holder of the high-speed milling cutter of the present invention;

Fig. 5 is the top view of the tool holder of the high-speed milling tool of the present invention;

6 is a top view A-A sectional view of the tool holder of the high-speed milling tool of the present invention;

7 is a schematic diagram of the sipe structure of the high-speed milling cutter of the present invention;

8 is a schematic diagram of the high-speed milling cutter of the present invention before tool assembly;

Fig. 9 is the schematic diagram after the cutter of the high-speed milling cutter of the present invention is assembled;

10 is a cross-sectional view of the sipe assembly of the high-speed milling cutter of the present invention;

11 is a cross-sectional view of a kerf of a high-speed milling tool of the present invention;

Figure 12 is a schematic diagram of the drive screw structure of the high-speed milling cutter of the present invention;

13 is a schematic structural diagram of an auxiliary compression screw of a high-speed milling cutter of the present invention;

14 is a schematic diagram of the tool holder structure of the high-speed milling tool according to Embodiment 2 of the present invention;

Fig. 15 is the front view of the tool holder of the high-speed milling tool of Embodiment 2 of the present invention;

16 is a schematic diagram of the tool holder structure of the high-speed milling tool according to Embodiment 3 of the present invention;

FIG. 17 is a top view of the tool holder of the high-speed milling tool according to the third embodiment of the present invention.

[Description of reference numerals]

1- Tool body; 2- Tool holder; 3- Drive screw; 4- Auxiliary compression screw; 1a- Tool groove; 11- Tool groove axial surface; 12- Tool groove radial surface; 14- the second tangential surface of the knife groove; 15- the driving screw hole of the knife groove; 16- the countersunk head screw hole; 16a- the countersunk head; 23-The first tangential surface of the tool holder; 24-The second tangential surface of the tool holder; 24a-Pressing surface; 25-Slit; 25a-The second slit; 25c-The first longitudinal slit; 26-fixed part; 27-elastic part; 28-cutting part; 29-drive screw hole; 31-head; 32-tail; 33-operation hole; 41-pressing operation hole; 42-thread segment; 43 - Countersunk end; P1- Tool cutting end face; P2 - Tool mounting end face.

detailed description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

The present invention provides a high-speed milling tool in order to solve the problems of complex structure of the existing tool, long adjustment time, unstable structure of the high-speed rotation of the tool and the like.

Example 1:

As shown in FIG. 1 to FIG. 7 , an embodiment of the present invention provides a high-speed milling cutter, including: a cutter body 1, the cutter body 1 is a disc-shaped cutter body, and a plurality of cutters are arranged on the cutter body 1 Slot 1a, the tool slot 1a is used to install the cutting unit; the cutting unit includes a tool holder 2, a driving screw 3 and an auxiliary pressing screw 4; The groove radial surface 12, the first tangential surface 13 of the tool groove and the second tangential surface 14 of the tool groove are formed. Each of the tool holders 2 is provided with a tool holder axial surface 21, a tool holder radial surface 22, a tool holder The first tangential surface 23 of the clip and the second tangential surface 24 of the tool holder; the axial surface 11 of the slot, the radial surface 12 of the slot, the first tangential surface 13 of the slot and the second tangential surface 14 of the slot They are respectively arranged opposite to the axial surface 21 of the tool holder, the radial surface 22 of the tool holder, the first tangential surface 23 of the tool holder and the second tangential surface 24 of the tool holder; the first tangential surface 23 of the tool holder and the The second tangential faces 24 of the clip are arranged opposite each other and are inclined to each other to form an acute angle a, the acute angle a shrinks towards the tool mounting end face P2, and opens in the direction towards the tool cutting end face P1; the tool holder 2 is formed by at least one slit 25 It is divided into a fixed part 26 and an elastic part 27, the fixed part 26 is provided with a cutting part 28, the first tangential surface 23 of the tool holder is provided on the fixed part 26, and the second tangential surface 24 of the tool holder is provided A driving screw hole 29 is defined in the elastic portion 27 ; the fixing portion 26 , and the tool holder 2 cooperates with the driving screw hole 29 through the driving screw 3 and faces along the first tangential surface 13 of the knife groove. The tool moves in the direction of the cutting end face or the tool mounting end face.

In this embodiment, the opening of the slit 25 faces the cutting end face P1 of the tool, and the slit 25 penetrates the tool holder 2 in the direction toward the radial surface 22 of the tool holder.

In the high-speed milling tool according to the above embodiment of the present invention, the included angle between the first tangential surface 23 of the tool holder and the second tangential surface 24 of the tool holder is a=8°. When the driving screw hole 29 of the tool holder fixing portion 26 drives the tool holder 2 to move in the direction of the tool cutting end face P1 or the installation end face P2 along the first tangential surface 13 of the tool groove, the tool holder 2 will move. Realize release or compression; when the tool holder 2 moves toward the tool installation end face P2, the elastic portion 27 will be squeezed, the slit 25 will shrink, and the tool holder 2 will be gradually clamped; When the tool holder 2 moves toward the cutting end face P1 of the tool, the elastic portion 27 is stretched, and the tool holder 2 and the slit 25 are released; It is driven to realize the function of self-compression, thereby reducing the demand of the tool for the pressing force of the pressing unit and simplifying the structure of the pressing unit.

The driving screw holes 29 are opened toward the cutting end face P1 of the tool, and the driving screw holes 29 are parallel to the first tangential surface 23 of the tool holder.

As shown in FIG. 10 and FIG. 11 , the first tangential surface 13 of the sipe and the second tangential surface 14 of the sipe are parallel to each other.

When the tool holder 2 is assembled into the tool slot 1a, the first tangential surface 23 of the tool holder is parallel to the first tangential surface 13 of the tool slot and the second tangential surface 14 of the tool slot.

In the high-speed milling tool according to the above embodiment of the present invention, since the first tangential surface 13 of the sipe and the second tangential surface 14 of the sipe are parallel to each other, when the tool holder 2 moves with the driving screw 3 to The compression amount of the tool holder 2 is stable when it is inside the tool groove 1a and fully compressed, so that the compression force is kept stable.

Wherein, the axial surface 11 of the knife groove is provided with a knife groove driving screw hole 15, and the axis of the knife groove driving screw hole 15 is parallel to the first tangential surface 13 of the knife groove. The shaft is parallel to the first tangential surface 23 of the tool holder, and the driving screw 3 drives the tool holder 2 through the driving screw hole 29 and the tool slot driving screw hole 15 . .

As shown in FIG. 11 and FIG. 12 , the driving screw 3 is a double-headed screw, the middle diameter of the head 31 of the driving screw is smaller than the middle diameter of the tail 32 of the driving screw, and the middle diameter of the driving screw hole 29 The diameter is smaller than the middle diameter of the kerf driving screw hole 15; the head 31 of the driving screw is used to cooperate with the driving screw hole 29, and the tail part 32 of the driving screw is used to cooperate with the kerf driving screw hole 15 fits.

Wherein, both ends of the driving screw 3 are provided with operating holes 33 .

In the high-speed milling tool according to the above embodiment of the present invention, the driving screw hole 29 is a through hole, the driving screw hole 29 is parallel to the first tangential surface 23 of the tool holder, and the thread of the driving screw hole 29 is parallel to the first tangential surface 23 of the tool holder. The opening faces the cutting end face P1 of the tool, the sipe driving screw hole 15 is parallel to the first tangential surface 13 of the sipe, and the sipe driving screw hole 15 is a through hole, which is convenient for installing the tool from the end face P2. For operation, since the driving screw 3 is a double-headed screw, and both ends of the driving screw 3 are provided with the operating holes 33, the head 31 of the driving screw is installed in the driving screw hole 29, The tail portion 32 of the driving screw is installed in the driving screw hole 15 of the knife groove, so the driving screw 3 can be operated from the upper and lower directions, and realize bidirectional movement, which makes the tool adjustment more convenient and fast; The pitch diameter of the head portion 31 of the driving screw is smaller than the pitch diameter of the tail portion 32, so during high-speed machining, the tail portion 32 of the driving screw 3 will have higher strength to resist lateral shear force, and at the same time, the driving screw 3 can be The centrifugal force received is converted to the cutter body 1 and prevents the cutter holder 2 from flying out of the cutter groove 1a, thereby further improving the anti-flying capability.

As shown in Figure 2, Figure 3, Figure 5 and Figure 7, the first tangential surface 13 of the knife groove and the first tangential surface 23 of the tool holder are provided with protrusions and depressions that cooperate with each other, and the second tangential surface of the knife groove The facing surface 14 and the second tangential surface 24 of the tool holder are provided with mutually matched protrusions and recesses.

In the high-speed milling cutter according to the above-mentioned embodiment of the present invention, the protrusions and the recesses are arranged as serrations that can cooperate with each other; The holes 29 are parallel, and at least one of the serrations disposed on the first tangential surface 13 of the sipe is parallel to the driving screw hole 15 of the sipe. At the same time, at least one of the serrations arranged on the second tangential surface 24 of the tool holder is parallel to the serrations on the first tangential surface 23 of the tool holder when the tool holder 2 is pressed; In the state where the tool holder 2 is pressed, at least one of the serrations on the second tangential surface 24 of the tool holder is parallel to the serrations on the second tangential surface 14 of the tool slot; At least one of the serrations on the two tangential surfaces 14 is parallel to the serrations on the first tangential surface 13 of the knife groove; therefore, as shown in FIG. 8 and FIG. The lower part can be smoothly compressed or released in the kerf 1a; at the same time, it is also ensured that the cutting portion 28 will not deflect in the kerf 1a, thereby improving the accuracy of the product; the tool holder 2 is pressed In the tight state, it is restricted by the sawtooth and cannot move laterally, so it is fixed in the tool groove 1a. The centrifugal force generated by the tool holder 2 when the tool rotates at high speed is borne by the tool body 1, which not only ensures the The tool holder 2 will not fly out of the tool groove 1a, and at the same time share the centrifugal force received by the driving screw 3 to prevent it from flying out of the tool body 1.

As shown in FIG. 13 , the auxiliary pressing screw 4 is a countersunk head screw, and pressing operation holes 41 are formed at both ends of the auxiliary pressing screw 4 .

The auxiliary screw hole 16 with a countersunk head structure is opened on the second tangential surface 14 of the knife groove, and the countersunk head 16a of the auxiliary screw hole 16 is opened on the side close to the second tangential surface 14 of the knife groove , the auxiliary pressing screw 4 is arranged in the auxiliary screw hole 16 .

The second tangential surface 24 of the tool holder is provided with a depressed pressing surface 24a. When the tool holder 2 is installed in the tool groove 1a, the end face of the countersunk end 43 of the auxiliary pressing screw 4 abuts against against the pressing surface 24a; the pressing surface 24a is concave relative to the second tangential surface 24 of the tool holder in the direction toward the first tangential surface 23 of the tool holder, and the tool holder is mounted on the When the knife groove is formed, the end face of the countersunk end of the auxiliary pressing screw abuts against the pressing face.

In the high-speed milling tool according to the above-mentioned embodiment of the present invention, the countersunk head screw hole 16 is formed on the second tangential surface 14 of the sipe, and the countersunk head 16a is arranged in a direction close to the second tangential direction of the sipe face 14 side; the auxiliary compression screw 4 is a countersunk head screw, the threaded section 42 of the auxiliary compression screw 4 is arranged in the countersunk head screw hole 16, and the countersunk head end of the auxiliary compression screw 4 43 The end face abuts on the pressing surface 24a; when installing, first install the auxiliary pressing screw 4 from the inside of the knife groove 1a into the countersunk head screw hole 16, after installing the knife holder 2 , and then rotate the other pressing operation hole 41 of the auxiliary pressing screw 4 from the outside of the cutter body 1 to make the end face of the countersunk end 43 press against the pressing surface 24a of the tool holder 2; On the one hand, the pressing effect on the tool holder 2 is enhanced. On the other hand, when the tool rotates, the auxiliary pressing screw 4 is blocked by the countersunk head 16a of the countersunk head screw hole 16 and will not fly out. , to improve the anti-flying effect.

Wherein, the cutter body 1 is composed of two kinds of metal materials, and the cutter body 1 includes an aluminum alloy inner ring and a steel outer ring.

Example 2:

As shown in FIGS. 14 and 15 , Embodiment 2 of the present invention provides a high-speed milling cutter, comprising: a cutter body 1 , the cutter body 1 is a disc-shaped cutter body, and a plurality of cutter bodies are evenly arranged on the cutter body 1 The tool groove 1a is used to install the cutting unit; the cutting unit includes the tool holder 2, the driving screw 3 and the auxiliary pressing screw 4; The radial surface 12 of the tool slot, the first tangential surface 13 of the tool slot and the second tangential surface 14 of the tool slot are formed. The first tangential surface 23 of the tool holder and the second tangential surface 24 of the tool holder; the axial surface 11 of the tool slot, the radial surface of the tool slot 12, the first tangential surface of the tool slot 13 and the second tangential surface of the tool slot 14 are respectively arranged opposite to the axial surface 21 of the tool holder, the radial surface 22 of the tool holder, the first tangential surface 23 of the tool holder and the second tangential surface 24 of the tool holder; the first tangential surface 23 of the tool holder and the The second tangential surfaces 24 of the tool holder are oppositely arranged and mutually inclined to form an acute angle a, the acute angle a shrinks toward the tool mounting end face P2, and opens in the direction toward the tool cutting end face P1; the tool holder 2 is formed by the slit 25 and The second slit 25a is divided into a fixed part 26 and an elastic part 27, the fixed part 26 is provided with a cutting part 28, the first tangential surface 23 of the tool holder is provided on the fixed part 26, the tool holder second The tangential surface 24 is provided on the elastic portion 27 ; the fixing portion 26 is provided with a driving screw hole 29 , and the tool holder 2 cooperates with the driving screw hole 29 through the driving screw 3 along the first groove of the knife. The tangential surface 13 moves in the sipe 1a in the direction of the cutting end face or the tool mounting end face of the tool.

The openings of the slits 25 and the second slits 25a face the tool cutting end face P1 and the tool mounting end face P2, respectively, and the slits 25 and the second slits 25a penetrate through the tool holder in the direction toward the radial surface 22 of the tool holder. Describe the tool holder 2.

Example 3:

As shown in FIG. 16 and FIG. 17 , Embodiment 3 of the present invention provides a high-speed milling cutter, comprising: a cutter body 1 , the cutter body 1 is a disc-shaped cutter body, and a plurality of Each of the chisel grooves 1a is used to install the cutting unit; the cutting unit includes a tool holder 2, a driving screw 3 and an auxiliary pressing screw 4; , the radial surface 12 of the tool slot, the first tangential surface 13 of the tool slot and the second tangential surface 14 of the tool slot, each of the tool holders 2 is provided with a tool holder axial surface 21, a tool holder radial surface 22 , the first tangential surface 23 of the tool holder and the second tangential surface 24 of the tool holder; the axial surface 11 of the tool slot, the radial surface 12 of the tool slot, the first tangential surface 13 of the tool slot and the second tangential surface of the tool slot The surfaces 14 are respectively arranged opposite to the axial surface 21 of the tool holder, the radial surface 22 of the tool holder, the first tangential surface 23 of the tool holder and the second tangential surface 24 of the tool holder; the first tangential surface 23 of the tool holder and the second tangential surface 24 of the tool holder are arranged opposite each other and are inclined mutually to form an acute angle a, the acute angle a shrinks towards the tool mounting end face P2, and opens in the direction towards the tool cutting end face P1; the tool holder 2 is provided with a first The longitudinal slit 25c and the second longitudinal slit 25d divide the tool holder 2 into a fixed portion 26 and an elastic portion 27. The fixed portion 26 is provided with a cutting portion 28, and the first tangential surface 23 of the tool holder is provided on the The fixing part 26, the second tangential surface 24 of the tool holder is arranged on the elastic part 27; the fixing part 26 is provided with a driving screw hole 29, and the tool holder 2 is connected with the driving screw through the driving screw 3. The hole 29 is adapted to move along the first tangential surface 13 of the sipe in the direction of the tool cutting end face or the tool mounting end face in the sipe 1a.

The first longitudinal slit 25c and the second longitudinal slit 25d penetrate the tool holder 2 in the direction toward the tool holder axial surface 21, and the opening directions of the first longitudinal slit 25c and the second longitudinal slit 25d are opposite.

The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims

A high-speed milling cutter, comprising: a cutter body, the cutter body is a disc-shaped cutter body, a plurality of cutter grooves are arranged on the cutter body, and the cutter grooves are used for installing a cutting unit; the cutting unit includes a tool holder and a driving screw; each of the knife grooves is composed of an axial surface of the knife groove, a radial surface of the knife groove, a first tangential surface of the knife groove and a second tangential surface of the knife groove, and each of the knife holders is provided with a The axial surface of the tool holder, the radial surface of the tool holder, the first tangential surface of the tool holder and the second tangential surface of the tool holder; the axial surface of the tool slot, the radial surface of the tool slot, the first tangential surface of the tool slot and the The second tangential surface of the tool groove is respectively arranged opposite to the axial surface of the tool holder, the radial surface of the tool holder, the first tangential surface of the tool holder and the second tangential surface of the tool holder; it is characterized in that:

The first tangential surface of the tool holder and the second tangential surface of the tool holder are oppositely arranged and mutually inclined to form an acute angle a, the acute angle a shrinks toward the tool installation end face, and opens in the direction toward the tool cutting end face; the cutter The clip is divided into a fixed part and an elastic part by at least one slit. the elastic part; the fixing part is provided with a driving screw hole, and the tool holder cooperates with the driving screw hole through the driving screw and faces the cutting end face of the tool or the installation end face of the tool along the first tangential direction of the tool groove sports.
The high-speed milling tool according to claim 1, wherein the driving screw hole is opened toward the cutting end face of the tool, and the axis of the driving screw hole is parallel to the first tangential plane of the tool holder.
The high-speed milling tool according to claim 2, wherein the first tangential surface of the sipe and the second tangential surface of the sipe are parallel to each other.
The high-speed milling tool according to claim 3, wherein a sipe driving screw hole is formed on the axial surface of the sipe, and the axis of the sipe driving screw hole is connected to the first tangential surface of the sipe In parallel, the axis of the driving screw hole is parallel to the first tangential plane of the tool holder, and the driving screw drives the tool holder through the driving screw hole and the knife groove driving screw hole.
The high-speed milling tool according to claim 4, wherein the driving screw is a double-ended screw, and both ends of the driving screw are provided with operating holes.
The high-speed milling tool according to claim 5, wherein the middle diameter of the head of the driving screw is smaller than the middle diameter of the tail of the driving screw, and the middle diameter of the driving screw hole is smaller than that of the kerf drive The middle diameter of the screw hole; the head of the driving screw is used for matching with the driving screw hole, and the tail of the driving screw is used for matching with the kerf-slot driving screw hole.
The high-speed milling tool according to claim 3, wherein the first tangential surface of the tool groove and the first tangential surface of the tool holder are provided with protrusions and recesses that cooperate with each other.
The high-speed milling tool according to claim 3, wherein the second tangential surface of the tool groove and the second tangential surface of the tool holder are provided with protrusions and recesses that cooperate with each other.
The high-speed milling tool according to claim 1, wherein the cutting unit further comprises an auxiliary pressing screw, the auxiliary pressing screw is a countersunk screw, and both ends of the auxiliary pressing screw are provided with pressing Tighten the operating hole.
The high-speed milling tool according to claim 9, wherein an auxiliary screw hole with a countersunk head structure is provided on the second tangential surface of the kerf, and the countersunk head of the auxiliary screw hole is provided close to the cutter On one side of the second tangential surface of the groove, the auxiliary pressing screw is arranged in the auxiliary screw hole.
The high-speed milling tool according to claim 10, wherein a depressed pressing surface is provided on the second tangential surface of the tool holder, and the pressing surface is facing the second tangential surface of the tool holder The first tangential surface of the tool holder is concave, and when the tool holder is installed in the tool groove, the countersunk end face of the auxiliary pressing screw abuts against the pressing surface.