CN116604059A - Annular groove cutter and machine tool - Google Patents

Abstract

The invention discloses an annular grooving cutter and a machine tool, which belong to the technical field of cutting processing and solve the problem that the joints of the existing grooving cutter are easy to wear; the blade includes a cutter body and a cutter head, and six cutter heads surround the cutter The body is arranged equidistantly and integrated with the cutter body. There is a circular arc transition part between the cutter head and the cutter body; the middle part of the cutter body is provided with a flower-shaped positioning hole; Shaped positioning groove; core sleeve, the core sleeve is matched with the positioning hole body and the positioning groove, the two ends of the core sleeve are respectively inserted into the positioning hole body and the positioning groove, and the locking screw is screwed through the core sleeve and the tool bar. For fixing blades, core sleeves and arbors. In the present invention, a flower-shaped positioning hole is provided in the middle of the cutter body, and a flower-shaped positioning groove is provided at the end of the cutter bar. The core sleeve is matched with the positioning hole and the positioning groove. Disperse the radial load, reduce all the loads of the locking screw, and reduce the wear between the locking screw and the cutter body and tool holder.

Description

An annular groove cutter and a machine tool

technical field

The invention relates to the technical field of cutting processing, in particular to an annular groove cutter and a machine tool.

Background technique

With the rapid development of small parts industry and general industry, it is the general trend to realize automatic and efficient processing. The market puts forward higher requirements for the radial grooving of 316L stainless steel slender shaft parts with small diameter (diameter less than 8mm). It is necessary to ensure the dimensional accuracy of continuous and equidistant grooving on the workpiece, and to ensure the surface finish of the machined surface. quality.

At present, the mainstream manufacturers in the market mainly use the grooving knife 500 for the radial grooving processing of the above-mentioned small diameter (diameter less than 8mm) 316L stainless steel slender shaft parts. Please refer to Fig. 13 to Fig. 16, the existing grooving insert 500 relies on the cooperation of the A, B faces and the E, F faces on the conventional tool holder, combined with the use of screws and threaded holes, to realize the two-edged single-sided cutter 510 positioning. Screws and threaded holes also bear a considerable part of the lateral load, so that the bending and torsion deformation of the two-edged single-side knife 510 will transmit additional load to the screws and threaded holes, which will aggravate the wear of the threaded holes.

Contents of the invention

In view of this, it is necessary to provide an annular grooving cutter and a machine tool to solve the problem that the connection of the existing grooving cutter is easy to wear.

In one aspect, the present invention provides an annular groove cutter, comprising:

The blade includes a cutter body and a cutter head, six cutter heads are equidistantly arranged around the cutter body and integrally connected with the cutter body, and an arc is arranged between the cutter head and the cutter body The transition part; the middle part of the cutter body is provided with a flower-shaped positioning hole;

A cutter bar, the end of the cutter bar is provided with a flower-shaped positioning groove;

A core sleeve, the core sleeve is adapted to the positioning hole body and the positioning groove, the two ends of the core sleeve are respectively inserted into the positioning hole body and the positioning groove, and the locking screw passes through the core The sleeve is screwed to the knife shank for fixing the blade, the core sleeve and the knife shank.

In some embodiments, the flank of the cutter head is connected to the cutter body through the arc transition portion, and the arc radius of the arc transition portion is R1.

In some embodiments, the positioning hole includes axially disposed protrusions and grooves around the cutter body, at least two of the protrusions are equidistantly spaced, and the grooves are disposed on adjacent two between the protrusions.

In some embodiments, the bottom surface of the groove is inclined relative to the axial direction of the cutter body, and the bottom surface of the groove is inclined relative to the cutter rod from a side far away from the cutter rod.

In some embodiments, the shape of the cross-sectional inner contour of the positioning hole body is consistent with the shape of the cross-sectional inner contour of the positioning groove and the shape of the cross-sectional outer contour of the core sleeve.

In some embodiments, the core sleeve is tapered from the middle to both ends, and the two ends of the core sleeve can be respectively mated and inserted into the positioning hole body and the positioning groove.

In some embodiments, the core sleeve is provided with at least two symmetrically arranged locking grooves, and the locking grooves are opened outside the core sleeve and arranged around the axis of the core sleeve.

In some embodiments, a communication hole is provided in the middle of the core sleeve, and the communication hole is adapted to a locking screw.

In some embodiments, the middle part of the positioning groove is provided with a screw hole embedded in the inside of the knife rod, and the locking screw is threaded through the communication hole and connected with the screw hole.

In one aspect, the present invention provides a machine tool, including the annular groove cutter, and the annular groove cutter is installed on the machine tool.

Compared with prior art, the beneficial effect that the present invention has is:

(1) A kind of annular groove cutter of the present invention and machine tool, the middle part of cutter body is provided with flower-shaped positioning hole body, the end of cutter bar is provided with flower-shaped positioning groove, and core sleeve is connected with positioning hole body and positioning groove. Fitting, the flower-shaped installation fit structure can effectively disperse the radial load, reduce all loads on the locking screw, and reduce the wear between the locking screw and the cutter body and tool holder.

(2) A kind of annular groove cutter of the present invention and machine tool, blade comprises cutter body and cutter head, and cutter head is provided with six and is integrally connected with cutter body, and six cutter heads are equidistantly arranged around cutter body, and blade adopts circular uniform The structure of the six cutter heads makes the overall structure of the blade appear as a centrally symmetrical structure. The blade has better stability during use. The stress and deformation of the cutter head are more balanced, which effectively improves the bearing and impact resistance of the cutter head. Moreover, the damage of a single cutter head has little influence on the overall structural strength of the blade, which improves the economy and practicability of the blade.

(3) A kind of annular groove cutter of the present invention and machine tool, be provided with arc transition part between cutter head and cutter body, arc transition part makes the cross-sectional area of cutter head compare with the sectional area when the inclined plane structure of traditional β angle Larger area can effectively improve the bearing capacity and impact resistance of the cutter head, and make the structural strength of the cutter head higher.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is the exploded structural diagram of the whole of the present invention;

Fig. 2 is a schematic diagram of the overall assembly structure of the present invention;

Fig. 3 is the structural representation of cutter bar among the present invention;

Fig. 4 is the three-dimensional structure schematic diagram of blade among the present invention;

Fig. 5 is the sectional structure schematic diagram of blade among the present invention;

Fig. 6 is a partially enlarged schematic structural view of A in Fig. 5;

Fig. 7 is a top view structural representation of the blade in the present invention;

Fig. 8 is a partially enlarged structural schematic diagram at B of Fig. 7;

Fig. 9 is a schematic diagram of the three-dimensional structure of the core sleeve of the present invention;

Fig. 10 is a schematic cross-sectional structural view of the core sleeve of the present invention;

Fig. 11 is a partially enlarged structural schematic diagram at C of Fig. 10;

Fig. 12 is a schematic diagram of the disassembly of the core sleeve of the caliper in the present invention;

Fig. 13 is a schematic diagram of the explosive structure of the grooving knife in the prior art;

Fig. 14 is a schematic structural view of a two-edged single-side knife in the prior art;

Fig. 15 is a schematic diagram of the local structure of the tip of a two-edged single-sided knife in the prior art;

Fig. 16 is a schematic diagram of a partial structure of a handle of a grooving knife in the prior art.

In the figure, the blade 100, the cutter body 110, the positioning hole body 111, the protrusion 111a, the groove 111b, the cutter head 120, the arc transition part 130, the cutter rod 200, the positioning groove 210, the screw hole 220, the core sleeve 300, the communication Hole 310, clamping slot 320, locking screw 400, grooving knife 500, two-edged one-side knife 510, caliper 600, threaded rod 610, claw 620, threaded sleeve 630.

Detailed ways

Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention and are not intended to limit the scope of the present invention.

A kind of annular groove cutter in the present embodiment, this annular groove cutter can be applied to the technical field of cutting processing, is installed on the corresponding lathe, carries out the slotting operation to stainless steel slender shaft parts, and the symmetrical structure of six blade heads 120 can When the cutter head 120 is subjected to load and impact, the degree of lateral torsional deformation of the cutter head 120 is reduced, the stress deformation of the cutter head 120 is more balanced, and the load bearing and impact resistance of the cutter head 120 are effectively improved. The inclined surface of the flank surface of the cutter head 120 combined with the transition structure of the large arc surface can further effectively improve the structural strength of the cutter head 120 . The flower-shaped installation fit structure can effectively disperse radial loads, reduce all loads on the locking screw 400 , and reduce wear between the locking screw 400 and the cutter body 110 and the cutter bar 200 .

It should be noted that the annular groove cutter of the present invention can be applied not only in the processing of stainless steel slender shaft parts, but also in other mechanical cutting processes.

A kind of annular groove cutter in the embodiment, comprises:

The blade 100, the blade 100 includes a cutter body 110 and a cutter head 120, six cutter heads 120 are equidistantly arranged around the cutter body 110 and integrally connected with the cutter body 110, and a circular arc transition portion 130 is provided between the cutter head 120 and the cutter body 110 ; The middle part of the cutter body 110 is provided with a flower-shaped positioning hole 111;

The cutter bar 200, the end of the cutter bar 200 is provided with a flower-shaped positioning groove 210;

The core sleeve 300, the core sleeve 300 is adapted to the positioning hole body 111 and the positioning groove 210, the two ends of the core sleeve 300 are respectively inserted in the positioning hole body 111 and the positioning groove 210, and the locking screw 400 passes through the core sleeve 300 and the knife The rod 200 is screwed to fix the blade 100 , the core sleeve 300 and the knife rod 200 .

In this embodiment, please refer to Fig. 1 to Fig. 3, the annular groove cutter mainly includes three parts connecting the blade 100, the core sleeve 300 and the knife rod 200 in sequence, and the two ends of the core sleeve 300 are respectively inserted into the blade 100 and the knife rod In 200, the locking screw 400 passes through the core sleeve 300 and is screwed to the cutter bar 200 to fix the blade 100, the core sleeve 300 and the cutter bar 200 together.

4 to 8, the blade 100 includes a cutter body 110 and a cutter head 120, six cutter heads 120 are integrally connected with the cutter body 110, six cutter heads 120 are equidistantly arranged around the cutter body 110, and the blade 100 adopts The structure of six cutter heads 120 evenly distributed in a ring makes the overall structure of the blade 100 a centrally symmetrical structure. The blade 100 has better stability during use. The degree of torsional deformation makes the force deformation of the cutter head 120 more balanced, and effectively improves the bearing capacity and impact resistance of the cutter head 120 . Moreover, damage to a single cutter head 120 has little effect on the overall structural strength of the blade 100 , which improves the economy and practicability of the blade 100 .

At the same time, in some embodiments, after a single cutter head 120 is damaged, the blade 100 can be rotated, and other intact cutter heads 120 can be selected for processing, so as to further improve the utilization rate of the blade 100 and prolong the service life of the blade 100 .

A circular arc transition portion 130 is provided between the cutter head 120 and the cutter body 110. The circular arc transition portion 130 replaces the bevel structure of the β angle of the existing grooving knife 500. The circular arc transition portion 130 makes the cross-sectional area of the cutter head 120 relatively The cross-sectional area of the traditional bevel structure with angle β is larger, which can effectively improve the bearing capacity and impact resistance of the cutter head 120 , and make the cutter head 120 have higher structural strength.

When machining parts with an annular groove cutter, the circular symmetrical structure of the six cutter heads 120 of the blade 100 can make the cutter head 120 reduce the degree of lateral deflection and torsional deformation of the cutter head 120 when bearing load and impact, and make the cutter head 120 less stressed. The force deformation is more balanced, which effectively improves the bearing capacity and impact resistance of the cutter head 120 . The cutter head 120 subjected to periodic impact, the closer to the tip of the cutter, the more severe the deformation of the bending moment, the bending moment increases in the form of an exponential gradient, and the cross-sectional area of the arc transition part 130 is compared with the traditional β-angle slope The cross-sectional area of the structure should be large, which can effectively improve the bearing capacity and impact resistance of the cutter head 120, so that the structural strength of the cutter head 120 is higher.

What needs to be explained is: compared with the traditional two-edged single-sided four-corner beveled grooving knife with 500 pieces and 100 structures, the six-edged structure design of the annular grooving knife has significantly improved the utilization rate of the tool material. The volume of the blade 100 is two-edged The one-sided four-corner inclined-plane grooving knife is twice as many as 500 pieces and 100 pieces, and the number of blades of the ring-shaped grooving knife is three times that of the two-edged one-sided four-corner beveled grooving knife 500 pieces 100. Utilization directly increased by 50%.

In some embodiments, please refer to FIG. 5 and FIG. 6 , the flank surface of the cutter head 120 is connected to the cutter body 110 through an arc transition portion 130 , and the arc radius of the arc transition portion 130 is R1. The radial span between the tip of the cutter head 120 and the cutter body 110 is H1, R1: H1=0.3-0.6. When the ratio of the arc radius of the arc transition portion 130 to the radial span is within the above range, the cross-sectional area of the arc transition portion 130 is much larger than the cross-sectional area of the traditional β-angle inclined plane structure, and the bearing and impact resistance of the cutter head 120 The capacity is significantly enhanced and the structural strength of the cutter head 120 is higher.

In some embodiments, please refer to FIG. 7 and FIG. 8 , the side slip angle of the cutter head 120 is σ, the size of the transition fillet connecting the cutter head 120 and the cutter body 110 is R2, and the flank of the cutter head 120 utilizes a circular arc The transition portion 130 is connected to the cutter body 110 , its arc size is R1 , and the first relief angle of the cutter head 120 is γ. Please refer to Fig. 13 to Fig. 16, the avoidance angles α, β, θ are the avoidance angles of the two-edged single-side knife on the existing grooving knife, and have design specifications and national standard requirements.

Among them, σ=θ/2, α angle and θ angle are the standard parameters of existing slotting knives, γ angle and α angle are equal, side slip angle σ and first relief angle γ are avoidance angles, which can be used in slotting Provides the function of processing avoidance space. The transition fillet R2 can avoid stress concentration of the cutter head 120 and prevent stress damage at the root of the cutter head 120 .

In some embodiments, please continue to refer to FIG. 4 to FIG. 7, a flower-shaped positioning hole 111 is provided in the middle of the cutter body 110, a flower-shaped positioning groove 210 is provided at the end of the cutter bar 200, and the core sleeve 300 is aligned with the positioning hole 111. The hole body 111 is compatible with the positioning groove 210, and the flower-shaped installation and matching structure can effectively disperse the radial load, reduce all loads on the locking screw 400, and reduce the wear between the locking screw 400, the cutter body 110 and the cutter bar 200 .

Please refer to FIG. 7 , in a further embodiment, the positioning hole body 111 includes axially disposed protrusions 111 a and grooves 111 b around the cutter body 110 , at least two protrusions 111 a are equidistantly spaced, and the grooves 111 b are disposed at Between two adjacent protrusions 111a.

The protrusion 111a and the groove 111b can be inserted into the end of the core sleeve 300, the part of the core sleeve 300 is inserted into the groove 111b, and the protrusion 111a is inserted into the core sleeve 300, thereby hindering the movement of the cutter body 110 relative to the core sleeve 300 Rotate to complete the self-locking of the cutter body 110 relative to the core sleeve 300 .

Optionally, there are two protrusions 111a and two grooves 111b, and the two grooves 111b are respectively arranged between the two protrusions 111a, and a flower-shaped positioning hole 111 is formed between the grooves 111b and the protrusions 111a for positioning The hole body 111 can hinder the rotation of the core sleeve 300 relative to the blade 100 , so as to realize the self-locking of the cutter body 110 relative to the core sleeve 300 .

Optionally, there are three protrusions 111a and three grooves 111b, the three grooves 111b are respectively arranged between two adjacent protrusions 111a, and flower-shaped positioning holes are formed between the grooves 111b and the protrusions 111a 111 , the positioning hole 111 can hinder the rotation of the core sleeve 300 relative to the blade 100 , and realize the self-locking of the cutter body 110 relative to the core sleeve 300 .

Optionally, there are four protrusions 111a and four grooves 111b, the four grooves 111b are respectively arranged between two adjacent protrusions 111a, and flower-shaped positioning holes are formed between the grooves 111b and the protrusions 111a 111 , the positioning hole 111 can hinder the rotation of the core sleeve 300 relative to the blade 100 , and realize the self-locking of the cutter body 110 relative to the core sleeve 300 .

Optionally, there are five protrusions 111a and five grooves 111b, and the five grooves 111b are respectively arranged between two adjacent protrusions 111a, and flower-shaped positioning holes are formed between the grooves 111b and the protrusions 111a 111 , the positioning hole 111 can hinder the rotation of the core sleeve 300 relative to the blade 100 , and realize the self-locking of the cutter body 110 relative to the core sleeve 300 .

Optionally, there are six protrusions 111a and six grooves 111b, and the six grooves 111b are respectively arranged between two adjacent protrusions 111a, and flower-shaped positioning holes are formed between the grooves 111b and the protrusions 111a 111 , the positioning hole 111 can hinder the rotation of the core sleeve 300 relative to the blade 100 , and realize the self-locking of the cutter body 110 relative to the core sleeve 300 .

Please refer to FIG. 4 , FIG. 9 and FIG. 3 , in order to match the above-mentioned different embodiments, the shape of the cross-sectional inner contour of the positioning hole 111 is consistent with the shape of the cross-sectional inner contour of the positioning groove 210 and the shape of the cross-sectional outer contour of the core sleeve 300 . The two ends of the core sleeve 300 are mated with the positioning hole 111 and the positioning groove 210 having the same flower-shaped profile, so as to realize the locking of the three in the axial direction and prevent the blade 100 from rotating in the axial direction.

In fact, the core sleeve 300 is provided with a concave portion matching with the protrusion 111a and a protrusion portion matching with the groove 111b, and the outside of the core sleeve 300 is in contact with the inner cavity of the positioning hole body 111 and the inner cavity of the positioning groove 210. fit.

The root of the groove 111b of the positioning hole body 111, the protrusion 111a of the positioning hole body 111, the root of the recessed part and the protruding part of the core sleeve 300, and the root of the positioning groove 210 are all rounded transition structures, which can prevent these parts from being damaged when loaded. Stress concentration problems occur, which in turn increases the overall tool life.

In some embodiments, please refer to FIG. 5 , the bottom surface of the groove 111b is inclined relative to the axial direction of the cutter body 110 , and the bottom surface of the groove 111b is inclined relative to the cutter holder 200 from a side away from the cutter holder 200 . The inclination angle of the bottom surface of the groove 111b relative to the axial direction of the cutter body 110 is η, wherein η=1°～8°, and the inclination angle of this η combined with the flower-shaped structure makes the blade 100 have certain self-locking when cutting. Function, the effect of the gravity of the blade 100 itself, plus the cutting force acting on the blade 100 during cutting, will press the annular groove blade 100 on the core sleeve 300, and the resisting force will increase with the increase of the cutting force.

In some embodiments, the core sleeve 300 is tapered from the middle to both ends, and the two ends of the core sleeve 300 can be mated with the positioning hole 111 and the positioning groove 210 respectively.

Please refer to FIGS. 9 to 11. As one of the implementations, the main structure of the core sleeve 300 is a tapered columnar body structure. The structure of the core sleeve 300 is based on the base plane N, and the inclination angle above the base plane N is η and a columnar body with a height of h1, below the base surface N is a columnar body with an inclination angle of η and a height of h2, the overall height of the core sleeve 300 is h3, where h3=h1+h2, there are 6 core sleeves 300 around The protruding portion and the six positioning recessed portions, both the protruding portion and the recessed portion present an inclination angle of η based on the base plane N. The included angle between the two sides of the protruding part is 30°, and the included angle between the two walls of the fixed recessed part is 30°. The six recessed parts and the recessed parts are distributed alternately around the core sleeve 300, so that the cross section of the core sleeve 300 is in the shape of a flower. structure, this cross-section is a flower-shaped structure, which is divided into upper and lower parts with a columnar structure with an inclination angle of η based on the base surface N, so that the core sleeve 300 can cooperate with the positioning hole body 111, and can also realize alignment of the blade 100. Accurate positioning and self-locking. At the same time, when the core sleeve 300 cooperates with the positioning groove 210 of the cutter bar 200 , accurate positioning and self-locking of the core sleeve 300 can also be realized. Both sides of the protruding part and the concave part are circular arc transition structures, which can avoid stress concentration problems during loading and effectively improve the structural strength of the protruding part and the concave part of the core sleeve 300 .

In some embodiments, the core casing 300 is provided with at least two symmetrically disposed locking grooves 320 , and the locking grooves 320 are opened outside the core casing 300 and arranged around the axis of the core casing 300 .

The slots 320 are arranged on the protrusion 111a of the core sleeve 300. The number of the slots 320 is at least two, and can be two, three or four. The slots 320 are respectively arranged on the protrusions 111a arranged equidistantly. On the upper part, the clamping groove 320 is perpendicular to the axial direction of the core sleeve 300 , and the clamping groove 320 cooperates with the use of the caliper 600 to facilitate the removal of the core sleeve 300 from the tool holder 200 .

Please refer to FIG. 12 . As an example, the caliper 600 is generally a disassembly tool used by an assembly fitter. By clamping the two symmetrical slots 320 , the core sleeve 300 can be clamped, which is convenient for workers to disassemble the core sleeve 300 from the tool bar 200. . In the present invention, a multi-jaw caliper 600 is disclosed. The multi-jaw caliper 600 includes a threaded rod 610, a plurality of claws 620 and a threaded sleeve 630. One end of the claw 620 is connected to the end of the threaded rod 610 and stretched outward. Open, the threaded sleeve 630 is screwed on the threaded rod 610, the threaded sleeve 630 can squeeze the claw 620 to realize the expansion and contraction of the end of the claw 620, and the end of the claw 620 away from the threaded rod 610 is provided with a groove 320 The butt joint part can be inserted into the card slot 320 when it is clamped and folded, so that it is convenient for the worker to disassemble the core sleeve 300 from the cutter bar 200 .

In some embodiments, please refer to FIG. 10 and FIG. 11 , a communication hole 310 is provided in the middle of the core sleeve 300 , and the communication hole 310 is adapted to the locking screw 400 . A straight chamfer is provided at the end of the communication hole 310 opposite to the nut of the locking screw 400 , and the included angle between the straight chamfer and the end surface of the core sleeve 300 is R3, and the range of R3 is 45° to 75°. In some specific implementations, R3 is chosen to be 55 degrees.

In addition, a circular arc transition structure is provided between the communication hole 310 and the straight chamfer, the angle of the circular arc transition structure is R4, and the angle R4 can make the communication hole 310 and the straight chamfer smoothly connected.

The straight chamfer and the arc transition structure with an angle of R4 can assist the insertion of the locking screw 400 into the communication hole 310, giving the locking screw 400 a guiding effect; at the same time, it can also reduce the contact and wear between the locking screw 400 and the communication hole 310 .

The diameter of the communication hole 310 is larger than that of the locking screw 400 , and when the locking screw 400 is turned, the communication hole 310 will not interfere with the locking screw 400 , thus causing wear of the locking screw 400 . The middle part of the positioning groove 210 is provided with a screw hole 220 embedded in the inside of the cutter bar 200. The locking screw 400 is screwed through the communication hole 310 and screwed with the screw hole 220. The nut of the locking screw 400 is simultaneously connected with the cutter body 110 and the core sleeve 300. For abutment, the stud of the locking screw 400 is screwed into the screw hole 220 , and the nut of the locking screw 400 is provided with a cross opening for easy screwing.

In a further embodiment, when the blade 100, the core sleeve 300 and the cutter bar 200 are assembled together, the height of the core sleeve 300 is smaller than the sum of the depth of the positioning groove 210 and the depth of the positioning hole 111. After the two ends of the sleeve 300 are inserted into the blade 100 and the cutter bar 200, one end of the core sleeve 300 opposite to the blade 100 is lower than the end of the positioning hole 111, and the core sleeve 300 is retracted in the positioning hole 111, and the core sleeve 300 and the The nuts of the locking screws 400 are arranged at intervals to ensure that the nuts compress the blade 100 .

A machine tool includes an annular groove cutter, which is installed on the machine tool. The annular groove cutter has six cutter heads 120 as cutting edges. When the machine tool performs radial grooving on stainless steel slender shaft parts, the commonly used knife The head 120 is worn or damaged due to use, the blade 100 can be removed from the core sleeve 300, and then the blade 100 is rotated, so that the other intact cutter heads 120 of the blade 100 can be fully used, prolonging the service life of the annular groove cutter.

In summary, the present invention provides an annular groove cutter and a machine tool, which can be applied in the technical field of cutting processing, installed on a corresponding machine tool, and perform groove operations on stainless steel slender shaft parts, and the symmetrical structure of the six cutter heads 120 can When the cutter head 120 is subjected to load and impact, the degree of lateral torsional deformation of the cutter head 120 is reduced, the stress deformation of the cutter head 120 is more balanced, and the load bearing and impact resistance of the cutter head 120 are effectively improved. The inclined surface of the flank surface of the cutter head 120 combined with the transition structure of the large arc surface can further effectively improve the structural strength of the cutter head 120 . The flower-shaped installation fit structure can effectively disperse radial loads, reduce all loads on the locking screw 400 , and reduce wear between the locking screw 400 and the cutter body 110 and the cutter bar 200 .

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the present invention.

Claims (10)

1. A ring groove cutter, characterized in that, comprising: The blade includes a cutter body and a cutter head, six cutter heads are equidistantly arranged around the cutter body and integrally connected with the cutter body, and an arc is arranged between the cutter head and the cutter body The transition part; the middle part of the cutter body is provided with a flower-shaped positioning hole; A cutter bar, the end of the cutter bar is provided with a flower-shaped positioning groove; A core sleeve, the core sleeve is adapted to the positioning hole body and the positioning groove, the two ends of the core sleeve are respectively inserted into the positioning hole body and the positioning groove, and the locking screw passes through the core The sleeve is screwed to the knife shank for fixing the blade, the core sleeve and the knife shank. 2. A kind of annular groove cutter according to claim 1, characterized in that, the flank of the cutter head is connected with the cutter body through the arc transition portion, and the arc of the arc transition portion The radius is R1. 3. The annular groove cutter according to claim 1, wherein the positioning hole body includes protrusions and grooves arranged axially around the cutter body, at least two of the protrusions are equidistant The grooves are arranged at intervals, and the grooves are arranged between two adjacent protrusions. 4. A kind of annular groove cutter according to claim 3, characterized in that, the bottom surface of the groove is inclined relative to the axial direction of the cutter body, and the bottom surface of the groove is opposite from the side far away from the knife rod The cutter bar is arranged obliquely. 5. A kind of annular groove cutter according to claim 3 or 4, characterized in that, the shape of the cross-sectional inner contour of the positioning hole body is the same as the shape of the cross-sectional inner contour of the positioning groove and the cross-sectional outer shape of the core sleeve. Contours are consistent in shape. 6. A kind of annular groove cutter according to claim 5, characterized in that, the core sleeve is tapered from the middle to both ends, and the two ends of the core sleeve can be respectively connected with the positioning hole body and the The positioning groove is matched with the plugging. 7. An annular groove cutter according to claim 1 or 6, characterized in that, the core sleeve is provided with at least two symmetrically arranged draw-in grooves, and the draw-in grooves are opened outside the core sleeve and surround The axis of the core sleeve is set. 8 . The annular groove cutter according to claim 1 , wherein a communication hole is provided in the middle of the core sleeve, and the communication hole is matched with a locking screw. 8 . 9. A kind of annular groove cutter according to claim 8, characterized in that, the middle part of the positioning groove is provided with a screw hole embedded in the inside of the knife rod, and the locking screw passes through the communication hole and the Screw-on connection. 10. A machine tool, characterized in that it comprises the annular groove cutter according to any one of claims 1-9, and the annular groove cutter is installed on the machine tool.