Cutting tool

Abstract

The invention discloses a cutting tool, which belongs to the technical field of cutting, and comprises a cutting tool and a cutting blade, one end of the cutting tool is provided with a receiving groove, and the top of the receiving groove and the top of the cutting blade form a first meshing area, a second meshing area and a first non-contact area; the bottom of the receiving groove and the bottom of the cutting blade form a second non-contact area, a third meshing area and a third non-contact area; a stable structure is formed among the first meshing area, the second meshing area and the third meshing area, and the included angle between the upper clamping surface of the cutting tool and the upper clamping surface of the cutting blade ensures that the cutting blade cannot longitudinally displace and disengage when the cutting blade is subjected to variable force during cutting machining. Due to the special cutting tool and the convex and concave pit structures on the upper clamping surface and the lower clamping surface of the cutting blade, the stability of the blade in the cutting process is ensured, and the transverse displacement of the blade can be relatively limited, adjusted and controlled when the blade is subjected to variable cutting force.

Description

Technical Field

[0001] The invention belongs to the technical field of cutting processing, in particular to a cutting processing tool. Background Art

[0002] Cutting tools play a vital role in industrial cutting. They are an indispensable part of the machining process and are often figuratively referred to as the "teeth" of machine tools. The performance of cutting tools directly affects the machining quality, efficiency and cost. In the entire cutting tool system, the structural design of cutting tools is the key to their performance. An excellent cutting tool design can not only improve cutting efficiency and reduce production costs, but also ensure the accuracy and surface quality of the workpiece. Therefore, the design of the cutting tool structure is undoubtedly the top priority. In the cutting tool structure design, the positioning structure plays a key role in cutting processing. It directly affects the machining accuracy and tool life. The accuracy of the positioning structure directly affects the machining accuracy of the workpiece. In the machining process, the role of the fixture is to ensure that the workpiece and the tool are correctly positioned for precise machining. If the positioning accuracy of the fixture is not high enough, even if the tool itself is very accurate, it may cause the machining size and shape accuracy of the workpiece to fail to meet the expected standards.

[0003] Whether the design of the positioning structure is reasonable will affect the service life of the tool. For example, if the clamping force is too large, it may cause the tool to break or break. In extreme cases, excessive clamping force may cause the tool to break. This is because when the tool is subjected to excessive force, the internal stress will exceed the tensile strength of the material, resulting in rupture; if the clamping force is too small, it may cause the tool to move during the processing process, which will also accelerate the wear of the tool. Therefore, the reasonable design of the tool structure should also take into account the cutting stability during the processing process. A reasonable positioning structure can reduce the additional cutting force caused by vibration or displacement.

[0004] In order to meet the needs of groove processing, most of the known cutting tools have a basic shape of long strips, which may cause the fixation of the blade to become unstable and unreliable. The main reason for this problem is that in addition to the deformation of the tool caused by the tightening screws, the only structure that prevents the displacement of the blade in the extension direction is the contact surface between the tail of the blade and the tool. Since the upper side, lower side and tail of the embedded structure of the groove processing blade and the tool are smooth plane structures, they lack the ability to lock the blade. The second is that the blade can only rely on the positioning structure to cooperate with the tool in the width direction to ensure the repeatability of the positioning accuracy of the blade. Generally speaking, this structure must first meet the centering effect, and most common centering structures are V-shaped, which lacks the effect of trimming and limiting the lateral displacement when the blade is subjected to lateral cutting force during cutting. Summary of the invention

[0005] The object of the present invention is to provide a cutting tool to solve the problems raised in the above-mentioned prior art. When the blade of the cutting tool is subjected to varying stress during the cutting process, it can also be stably maintained in an ideal, predetermined position.

[0006] A cutting tool is provided, comprising a cutting tool and a cutting blade, wherein one end of the cutting tool is provided with a receiving groove.

[0007] The top of the receiving groove and the top of the cutting blade form a first meshing area, a second meshing area and a first non-contact area;

[0008] The bottom of the receiving groove and the bottom of the cutting insert form a second non-contact area, a third meshing area, and a third non-contact area;

[0009] A stable structure is formed among the first meshing area, the second meshing area and the third meshing area.

[0010] As a further embodiment of the present invention: the first meshing area is formed by an meshing groove at the top of the receiving groove and an meshing tooth at the top of the cutting blade, and the second meshing area is formed by two meshing grooves at the top of the receiving groove and two meshing teeth at the top of the cutting blade; the first non-contact area is formed between the first meshing area and the second meshing area, and cooperates with an meshing groove at the top of the receiving groove and an meshing tooth at the top of the cutting blade. These areas provide stable traction during the cutting process to ensure that the blade does not move continuously; the first non-contact area is located between the first meshing area and the second meshing area, allowing the cutting blade to have a certain degree of freedom when the cutting force changes, reducing the friction between the cutting blade and the cutting tool, and avoiding excessive fatigue. The third meshing area is formed by two meshing grooves at the bottom of the receiving groove and an meshing tooth at the bottom of the cutting blade, ensuring that the cutting blade is fixed at the bottom and enhancing the overall stability. The second non-contact area and the third non-contact area provide space for the movement of the cutting tool, so that the cutting tool can move during the cutting process to adapt to different cutting conditions.

[0011] As a further embodiment of the present invention: the first meshing area includes a first curved surface at the top of the receiving groove and a second curved surface at the top of the cutting blade, as well as a third curved surface at the top of the receiving groove and a fourth curved surface at the top of the cutting blade. The first curved surface and the second curved surface are in sealing contact with each other, and the third curved surface and the fourth curved surface are in sealing contact with each other. An obtuse-angle groove is formed between the first curved surface, the second curved surface, the third curved surface and the fourth curved surface. The fifth curved surface and the sixth curved surface, as well as the seventh curved surface and the eighth curved surface are in sealing contact to ensure the cleanliness of the cutting area and effectively prevent cutting fluid or chips from entering the receiving groove and interfering with cutting fluid or chips. The obtuse-angle groove provides additional contact area, increases supporting force, and at the same time improves the fixation of the blade and prevents the cutting blade from loosening. When the second meshing area is subjected to cutting force, it is beneficial to disperse pressure and improve the stability of the cutting spindle.

[0012] As a further embodiment of the present invention: the second meshing area includes a fifth curved surface at the top of the receiving groove and a sixth curved surface at the top of the cutting blade, as well as a seventh curved surface at the top of the receiving groove and an eighth curved surface at the top of the cutting blade, the fifth curved surface and the sixth curved surface are in sealing contact with each other, and the seventh curved surface and the eighth curved surface are in sealing contact with each other; an obtuse-angle groove is formed between the fifth curved surface, the sixth curved surface and the seventh curved surface and the eighth curved surface, and the sealing contact between the fifth curved surface and the sixth curved surface, and the seventh curved surface and the eighth curved surface ensures the cleanliness of the cutting area, and can effectively prevent cutting fluid or chips from entering the receiving groove and preventing interference from cutting fluid or chips. The obtuse-angle groove provides additional contact area, increases supporting force, and at the same time improves the fixation of the blade and prevents the cutting blade from loosening. When the second meshing area is subjected to cutting force, it is beneficial to disperse pressure and improve the stability of the cutting spindle.

[0013] As a further embodiment of the present invention: a first convex portion is formed between the third curved surface and the seventh curved surface at the top of the receiving groove, and a first concave portion is formed between the fourth curved surface and the eighth curved surface at the top of the cutting blade. The first convex portion does not contact the concave portion, and the distance between the first convex portion and the first concave portion is H16. The existence of H16 ensures that the first convex portion does not contact the first concave portion, reduces fatigue and coefficient, and extends the life of the tool. The gap between the first convex portion and the first concave portion allows the cutting tool II to have a certain micro-motion space when subjected to force, which is beneficial for the cutting blade I to better adapt to changes in cutting conditions during the cutting process and maintain processing stability.

[0014] As a further embodiment of the present invention: the third meshing area includes a ninth curved surface at the bottom of the receiving groove and a tenth curved surface at the bottom of the cutting blade, the ninth curved surface and the tenth curved surface are in sealed contact with each other, as well as an eleventh curved surface at the bottom of the receiving groove and a twelfth curved surface at the bottom of the cutting blade, the eleventh curved surface and the twelfth curved surface are in sealed contact with each other, the eleventh curved surface and the twelfth curved surface are in sealed contact with each other, the ninth curved surface and the tenth curved surface are in sealed contact with each other, and the eleventh curved surface and the twelfth curved surface are in sealed contact with each other, ensuring the cleanliness of the cutting area, and can effectively prevent cutting fluid or chips from entering the receiving groove and preventing interference from cutting fluid or chips. Through multiple sealing contact surfaces, the third meshing area can better disperse the cutting stress generated during partitioning and reduce local fatigue.

[0015] As a further embodiment of the present invention: a second recess is formed between the ninth curved surface and the eleventh curved surface, a plane is formed between the tenth curved surface and the twelfth curved surface, the second recess is not in contact with the plane, and the distance between the second recess and the plane is H14. The existence of H14 ensures that the second recess is not in contact with the plane, which helps to extend the service life of the cutting tool II. The gap allows the cutting tool to have a certain degree of freedom when subjected to force, so that the blade can more flexibly adapt to changes in the cutting process and enhance the stability of the processing.

[0016] As a further embodiment of the present invention: the second non-contact area and the third non-contact area are symmetrically arranged on both sides of the third meshing area, the distance between the highest points of two adjacent curved surfaces in the second non-contact area and the third non-contact area is H11, and the distance between the lowest points of two adjacent curved surfaces in the second non-contact area and the third non-contact area is H12. The uniform distribution of H11 and H12 is conducive to the distribution of the stress generated during the cutting process, avoiding concentrated failures, and thus reducing the risk of wear and damage to the tool. The design of these two non-contact areas enhances the stability of the blade, making it less likely to be loaded during loading, thereby improving the processing accuracy and consistency, and the tool has a certain adaptability when the force changes. The setting can better cope with different cutting conditions and enhance the overall cutting performance.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a cutting tool, in which the cutting blade cooperates with the cutting tool through upper and lower clamping surfaces, and the displacement of the blade can be effectively limited during the groove processing process. The angle between the upper clamping surfaces of the cutting tool and the blade and the longitudinal axis ensures that the blade will not be displaced longitudinally when subjected to variable forces during the cutting process. The special protrusion and pit structure of the upper and lower clamping surfaces not only ensures the stability of the blade during the cutting process, but also can relatively limit and adjust the lateral displacement of the blade when subjected to variable cutting forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present drawings or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present drawings. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the overall decomposition structure of a cutting tool;

[0021] Figure 2 A schematic diagram of the front view structure of the cutting blade provided by the present invention;

[0022] Figure 3 A schematic diagram of the left side structure of the cutting blade provided by the present invention;

[0023] Figure 4 for Figure 3 A magnified detail of the structure in the middle A area;

[0024] Figure 5 for Figure 3 A magnified detail of the structure in the middle B area;

[0025] Figure 6 A partial front view of a positioning and clamping portion of a cutting blade provided by the present invention;

[0026] Figure 7 A partial left side view of the positioning and clamping portion of the cutting blade provided by the present invention;

[0027] Figure 8 A detailed view of the clamping surface on the cutting tool provided by the present invention;

[0028] Fig. 9 A detailed view of the lower clamping surface of the cutting tool provided by the present invention;

[0029] Fig.10 The assembly front view structure diagram provided by the present invention;

[0030] Fig.11 for Fig.10 7a-7a cross-sectional view;

[0031] Fig.12 for Fig.10 Detailed view of the clamping fit in the section 7a-7a;

[0032] Fig.13 for Fig.10 Detailed view of the clamping fit under the section 7a-7a;

[0033] Fig.14 for Fig.10 Section view of section 7b-7b.

[0034] In the figure: Ⅰ, cutting blade;

[0035] Ⅱ. Cutting tools;

[0036] AS1, longitudinal axis;

[0037] VP1, mid-transverse plane;

[0038] VP2, mid-longitudinal plane;

[0039] PU1, upper clamping level;

[0040] PU2, upper clamping level;

[0041] PL, lower clamping level;

[0042] DW, direction of prolapse;

[0043] DL, insertion direction;

[0044] 0. Receiving slot;

[0045] 1. Cutting blade positioning and clamping part;

[0046] 2. Tool holder base;

[0047] 3. Cutting blade clamping handle;

[0048] 4. Cutting blade cutting head;

[0049] 5. Clamping surface under cutting blade;

[0050] 6. Clamping surface on cutting blade;

[0051] 7. Upper clamping jaw;

[0052] 8. Lower clamping jaw;

[0053] 9. Tail avoidance and limiter;

[0054] 10. Rear spring slot;

[0055] 11. Spring deformation part;

[0056] 12. Elliptical groove;

[0057] 13. Clamping surface on cutting tool;

[0058] 14. Lower clamping surface of cutting tool;

[0059] 21. Second surface;

[0060] 22. The sixth surface;

[0061] 23. The fourth surface;

[0062] 24. The eighth surface;

[0063] 25. The left side oblique curved surface of the large pit in the middle of the clamping surface on the cutting blade;

[0064] 26. The right side inclined surface of the large pit in the middle of the clamping surface on the cutting blade;

[0065] 27. A small protrusion on the left side of the clamping surface on the cutting blade;

[0066] 28. A small pit on the left side of the clamping surface on the cutting insert;

[0067] 29. A small pit on the left side of the clamping surface on the cutting blade;

[0068] 30. The first concave part;

[0069] 31. A small protrusion on the right side of the clamping surface on the cutting blade;

[0070] 32. A small pit on the right side of the clamping surface on the cutting insert;

[0071] 33. A small protrusion on the right side of the clamping surface on the cutting blade;

[0072] 34. A small pit on the left side of the lower clamping surface of the cutting insert;

[0073] 35. A small protrusion on the left side of the lower clamping surface of the cutting blade;

[0074] 36. The second concave part;

[0075] 37. A small pit on the right side of the lower clamping surface of the cutting insert;

[0076] 38. A small protrusion on the right side of the lower clamping surface of the cutting insert;

[0077] 39. The right side inclined surface of the small pit on the left side of the lower clamping surface of the cutting blade;

[0078] 40. The ninth surface;

[0079] 41. Eleventh surface;

[0080] 42. The left side oblique curved surface of the small pit on the right side of the lower clamping surface of the cutting insert;

[0081] 44. A small protrusion on the left side of the clamping surface on the cutting tool;

[0082] 45. A small pit on the left side of the clamping surface on the cutting tool;

[0083] 46. ​​First protrusion;

[0084] 47. A small pit on the right side of the clamping surface on the cutting tool;

[0085] 48. A small protrusion on the right side of the clamping surface on the cutting tool;

[0086] 49. The first curved surface;

[0087] 50. The third surface;

[0088] 51. The left oblique curved surface of the first protrusion;

[0089] 52. The right side inclined surface of the first protrusion;

[0090] 53. The seventh surface;

[0091] 54. Fifth surface;

[0092] 55. A small protrusion on the left side of the lower clamping surface of the cutting tool;

[0093] 56. A small pit on the left side of the lower clamping surface of the cutting tool;

[0094] 57. A large bulge in the middle of the lower clamping surface of the cutting tool;

[0095] 58. A small protrusion on the right side of the lower clamping surface of the cutting tool;

[0096] 59. A small pit on the right side of the lower clamping surface of the cutting tool;

[0097] 70. The left side of the lower clamping surface of the cutting tool has a small protrusion and the right side has an inclined curved surface;

[0098] 71. The tenth surface;

[0099] 72. Surface 12;

[0100] 73. The left side of the small protrusion on the right side of the lower clamping surface of the cutting tool is an inclined surface;

[0101] 74. Plane;

[0102] 91. Air-avoiding structure at the tail of receiving trough;

[0103] 92. The longitudinal limiting surface at the tail of the receiving groove;

[0104] 131, the front half of the upper clamping surface of the cutting tool;

[0105] 132. The rear half of the upper clamping surface of the cutting tool;

[0106] 101, left engagement groove on the lower clamping surface of the cutting tool;

[0107] 102, right side engagement groove on the lower clamping surface of the cutting tool;

[0108] 103. Compound meshing groove on the left side of the clamping surface of the cutting tool;

[0109] 104. Compound meshing groove on the right side of the clamping surface of the cutting tool;

[0110] 105, composite meshing teeth on the left side of the lower clamping surface of the cutting insert;

[0111] 106, composite meshing teeth on the right side of the lower clamping surface of the cutting insert;

[0112] 107, composite meshing teeth on the left side of the clamping surface of the cutting insert;

[0113] 108. Compound meshing teeth on the right side of the clamping surface of the cutting insert;

[0114] 201. Gap;

[0115] 151, first tail longitudinal limiting surface;

[0116] 152, second tail longitudinal limiting surface;

[0117] 431, left curved surface of upper clamping jaw;

[0118] 432, right curved surface of upper clamping jaw;

[0119] 433, the left curved surface of the lower clamping jaw;

[0120] 434, right curved surface of the lower clamping jaw;

[0121] 435, right side surface of the cutting insert clamping shank;

[0122] 436. The left side surface of the cutting insert clamping handle. DETAILED DESCRIPTION

[0123] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0124] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed in this application, some changes in design, manufacturing or production based on the technical content disclosed in this application are just conventional technical means, and should not be understood as insufficient content disclosed in this application.

[0125] However, unnecessary detailed descriptions may be omitted. For example, detailed descriptions of well-known matters and repeated descriptions of substantially the same structures may be omitted. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate understanding by those skilled in the art. In addition, the drawings and the following description are provided to enable those skilled in the art to fully understand the present application and are not intended to limit the subject matter described in the claims.

[0126] See also Figure 1-14 As shown, a cutting tool in an embodiment of the present invention,

[0127] It includes a cutting tool II and a cutting insert I. One end of the cutting tool is provided with a receiving groove 0.

[0128] The top of the receiving groove 0 and the top of the cutting insert Ⅰ form a first meshing area, a second meshing area and a first non-contact area;

[0129] The bottom of the receiving groove 0 and the bottom of the cutting insert Ⅰ form a second non-contact area, a third meshing area and a third non-contact area;

[0130] A stable structure is formed between the first meshing area, the second meshing area and the third meshing area;

[0131] In one embodiment, see Fig.11 , Fig.12 and Fig.13 The first meshing area is formed by a meshing groove at the top of the receiving groove 0 and a meshing tooth at the top of the cutting blade I, and the second meshing area is formed by two meshing grooves at the top of the receiving groove and two meshing teeth at the top of the cutting blade I; the first non-contact area is formed between the first meshing area and the second meshing area;

[0132] The third meshing area is formed by two meshing grooves at the bottom of the receiving groove 0 and a meshing tooth at the bottom of the cutting blade I. The second non-contact area and the third non-contact area are respectively formed at both ends of the third meshing area, and are used to form a space for adjustment when the cutting tool II moves. Through the meshing groove at the top of the receiving groove 0 and the meshing tooth at the top of the cutting blade I, these areas provide stable traction during the cutting process to ensure that the blade does not move continuously; the first non-contact area is located between the first meshing area and the second meshing area, allowing the cutting blade I to have a certain degree of freedom when subjected to cutting force changes, reducing the friction between the cutting blade I and the cutting tool II, and avoiding excessive fatigue;

[0133] The third meshing area is formed by two meshing grooves at the bottom of the receiving groove 0 and an meshing tooth at the bottom of the cutting blade I, ensuring the fixation of the cutting blade I at the bottom and enhancing the overall stability. The second non-contact area and the third non-contact area provide space for the movement of the cutting tool II, so that the cutting tool II can move during the cutting process and adapt to different cutting conditions.

[0134] In one embodiment, see Fig.11 , Fig.12 and Fig.13 The first meshing area includes a first curved surface 49 at the top of the receiving groove, the first curved surface 49 and the second curved surface 21 at the top of the cutting blade, and a third curved surface 50 at the top of the receiving groove and a fourth curved surface 23 at the top of the cutting blade. The first curved surface 49 and the second curved surface 21 are in sealing contact with each other, and the third curved surface 50 and the fourth curved surface 23 are in sealing contact with each other; an obtuse-angle groove is formed between the first curved surface 49, the second curved surface 21 and the third curved surface 50 and the fourth curved surface 23. The sealing contact between the first curved surface 49 and the second curved surface 21, and the third curved surface 50 and the fourth curved surface 23 can effectively prevent cutting fluid or chips from entering the receiving groove 0 and keep the cutting area clean. The obtuse-angle groove provides additional contact area, increases supporting force, and at the same time improves the fixation of the blade and prevents the cutting blade from loosening. When the first meshing area is subjected to cutting force, it is beneficial to disperse pressure and improve the stability and cutting performance of the cutting spindle.

[0135] In one embodiment, see Fig.11 , Fig.12 and Fig.13 The second meshing area includes the fifth curved surface 54 at the top of the receiving groove and the sixth curved surface 22 at the top of the cutting blade, as well as the seventh curved surface 53 at the top of the receiving groove 0 and the eighth curved surface 24 at the top of the cutting blade. The fifth curved surface 54 and the sixth curved surface 22 are in sealing contact with each other, and the seventh curved surface 53 and the eighth curved surface 24 are in sealing contact with each other; an obtuse-angle groove is formed between the fifth curved surface 54, the sixth curved surface 22 and the seventh curved surface 53 and the eighth curved surface 24. The sealing contact between the fifth curved surface 54 and the sixth curved surface 22, and the seventh curved surface 53 and the eighth curved surface 24 ensures the cleanliness of the cutting area and can effectively prevent cutting fluid or chips from entering the receiving groove 0 and preventing interference from cutting fluid or chips. The obtuse-angle groove provides additional contact area, increases supporting force, and at the same time improves the fixation of the blade and prevents the cutting blade from loosening. When the second meshing area is subjected to cutting force, it is beneficial to disperse pressure and improve the stability of the cutting spindle.

[0136] In one embodiment, see Fig.11 , Fig.12 and Fig.13A first convex portion 46 is formed between the third curved surface 50 and the seventh curved surface 53 at the top of the receiving groove 0, and a first concave portion 30 is formed between the fourth curved surface 23 and the eighth curved surface 24 at the top of the cutting blade. The first convex portion 46 does not contact the first concave portion 30, and the distance between the first convex portion 46 and the first concave portion 30 is H16. The existence of H16 ensures that the first convex portion 46 does not contact the first concave portion 30, reduces fatigue and coefficient, and extends the life of the tool. The first convex portion 46 does not contact the first concave portion 30, and there is a gap between the first convex portion 46 and the first concave portion 30, allowing the cutting tool II to have a certain micro-motion space when subjected to force, which is beneficial for the cutting blade I to better adapt to changes in cutting conditions during the cutting process and maintain processing stability.

[0137] In one embodiment, see Fig.11 , Fig.12 and Fig.13 The third meshing area includes the ninth curved surface 40 at the bottom of the receiving groove and the tenth curved surface 71 at the bottom of the cutting blade. The ninth curved surface 40 and the tenth curved surface 71 are in sealed contact with each other, as well as the eleventh curved surface 41 at the bottom of the receiving groove and the twelfth curved surface 72 at the bottom of the cutting blade. The eleventh curved surface 41 and the twelfth curved surface 72 are in sealed contact with each other. The ninth curved surface 40 and the tenth curved surface 71 are in sealed contact with each other, and the eleventh curved surface 41 and the twelfth curved surface 72 are in sealed contact with each other, ensuring the cleanliness of the cutting area, and can effectively prevent cutting fluid or chips from entering the receiving groove 0, and prevent interference from cutting fluid or chips. Through multiple sealing contact surfaces, the third meshing area can better disperse the cutting stress generated during partitioning and reduce local fatigue.

[0138] In one embodiment, see Fig.11 , Fig.12 and Fig.13 A second recess 36 is formed between the ninth curved surface 40 and the eleventh curved surface 41, and a plane 74 is formed between the tenth curved surface 71 and the twelfth curved surface 72. The second recess 36 does not contact the plane 74. The distance between the second recess 36 and the plane 74 is H14. The existence of H14 ensures that the second recess does not contact the plane 74, which helps to extend the service life of the cutting tool II. The gap allows the cutting tool II to have a certain degree of freedom when subjected to force, so that the blade can more flexibly adapt to changes in the cutting process and enhance the stability of the processing.

[0139] In one embodiment, see Fig.11 , Fig.12 and Fig.13The second non-contact area and the third non-contact area are symmetrically arranged on both sides of the third meshing area. The distance between the highest points of two adjacent curved surfaces in the second non-contact area and the third non-contact area is H11, and the distance between the lowest points of two adjacent curved surfaces in the second non-contact area and the third non-contact area is H12. The uniform distribution of H11 and H12 is conducive to the distribution of the stress generated during the cutting process, avoiding concentrated failures, thereby reducing the risk of tool wear and damage. The design of these two non-contact areas enhances the stability of the blade, making it less likely to be loaded during loading, and improves the processing accuracy and consistency. The tool has a certain adaptability when the force changes, and the setting can better cope with different cutting conditions and enhance the overall cutting performance.

[0140] See also Figure 1 , Figure 6 , Fig.10 As shown, in a specific embodiment of the present invention, it includes two major components, a cutting blade I and a cutting tool II, and the cutting blade I can be releasably clamped in the receiving groove 0 of the cutting tool II, and the cutting tool II includes: a tool holder base 2 and a cutting blade positioning and clamping part 1. The tool holder base 2 is an intermediary connecting the machine tool and the cutting blade positioning and holding part 1, and the cutting blade positioning and clamping part 1 has: a receiving groove 0, which is arranged along the length direction of the tool holder base 2 and is open at the front end.

[0141] The receiving groove 0 comprises: a lower clamping jaw 8, the lower clamping jaw 8 including a cutting tool lower clamping surface 14;

[0142] The upper clamping jaw 7 includes an upper clamping surface 13 for the cutting tool. When the fastening screw is tightened, the upper clamping jaw 7 can be elastically displaced relative to the lower clamping jaw 8;

[0143] A longitudinal axis AS1, which is located in the receiving groove 0, is arranged parallel to the length direction of the receiving groove 0, and passes through the rear clearance and limiter 9 of the cutting tool II and the cutting blade I, so as to limit the longitudinal displacement of the blade;

[0144] The rear spring groove 10 is located at the rear of the receiving groove 0 and passes through the width direction of the tool holder base 2. The rear spring groove 10 includes: a spring deformation portion 11, which is mainly in the form of an elongated groove, and can make the upper clamping jaw 7 elastically displaced when the fastening screw is tightened; an elliptical groove portion 12, and the position of the elliptical groove portion 12 partially overlaps with the elongated groove of the spring deformation portion 11.

[0145] See also Figure 6 and Figure 7As shown, the cutting blade positioning and clamping part 1 has a middle longitudinal plane VP2, and the middle longitudinal plane VP2 passes through the left curved surface 431 of the upper clamping jaw, the right curved surface 432 of the upper clamping jaw, the left curved surface 433 of the lower clamping jaw, and the right curved surface 434 of the lower clamping jaw, that is, the vertical distance between the plane and all the above curved surfaces is the same, and the longitudinal axis AS1 is located in the middle longitudinal plane VP2. The tail clearance limiting part 9 includes a receiving groove tail clearance structure 91 and a receiving groove tail longitudinal limiting surface 92. The upper clamping surface 13 of the cutting tool is divided into The front half 131 of the upper clamping surface of the cutting tool and the rear half 132 of the upper clamping surface of the cutting tool are provided. The front half 131 of the upper clamping surface of the cutting tool has an angle of 2.5 to 6° with the longitudinal axis AS1, and the rear half 132 of the upper clamping surface of the cutting tool has an angle of 1° with the longitudinal axis AS1. The lower clamping surface is arranged parallel to the longitudinal axis AS1, so the receiving groove 0 presents a cone-like structure with a small opening and a large tail in the longitudinal layout. The upper and lower clamping distances at the opening are marked as H6, and the upper and lower clamping distances at the tail are marked as H7, that is, H6<H7;

[0146] A part of the spring deformation portion 11 is located inside the receiving groove 0, dividing the cutting blade positioning and clamping part 1 into two parts, upper and lower parts, and intersecting with the tail longitudinal limit surface 92. The elliptical groove 12 is located obliquely rearward of the tail longitudinal limit surface 92, and the overlapping area with the spring deformation portion 11 is approximately 1 / 3 to 2 / 3 of itself, and the distance from the tail longitudinal limit surface 92 is approximately 1 / 3 of the distance from the tail longitudinal limit surface 92 to the rear end of the spring deformation portion 11.

[0147] See also Fig. 9 As shown, the lower clamping surface 14 of the cutting tool is mainly composed of a small protrusion 55 on the left side of the lower clamping surface of the cutting tool, a small pit 56 on the left side of the lower clamping surface of the cutting tool, a large protrusion 57 in the middle of the lower clamping surface of the cutting tool, a small pit 59 on the right side of the lower clamping surface of the cutting tool, and a small protrusion 58 on the right side of the lower clamping surface of the cutting tool, which is a complex curved surface. Among them, the small protrusion 55 on the left side of the lower clamping surface of the cutting tool, the small pit 56 on the left side of the lower clamping surface of the cutting tool, the small pit 59 on the right side of the lower clamping surface of the cutting tool, and the small protrusion 58 on the right side of the lower clamping surface of the cutting tool are symmetrical along the middle longitudinal plane VP2, and are arranged along the length direction of the blade and parallel to the longitudinal axis AS1; the narrow groove formed by the small protrusion 55 on the left side of the lower clamping surface of the cutting tool, the small pit 56 on the left side of the lower clamping surface of the cutting tool and the tenth curved surface 71 is the left side meshing groove 101 of the lower clamping surface of the cutting tool; the small protrusion 58 on the right side of the lower clamping surface of the cutting tool, the small pit 59 on the right side of the lower clamping surface of the cutting tool and the twelfth curved surface 72 together constitute the right side meshing groove 102 of the lower clamping surface of the cutting tool, and the left side meshing groove 101 of the lower clamping surface of the cutting tool and the right side meshing groove 102 of the lower clamping surface of the cutting tool are also symmetrical along the middle longitudinal plane VP2;

[0148] The narrow groove formed by the right inclined surface 70 of the small protrusion on the left side of the lower clamping surface of the cutting tool and the left inclined surface 73 of the small protrusion on the right side of the lower clamping surface of the cutting tool has an angle of α, and α≥60°. The narrow groove formed by the tenth curved surface 71 and the right inclined surface of the lower clamping surface of the cutting tool has an angle of β, and β is less than or equal to 160°.

[0149] There is a plane 74 at the top of the large protrusion 57 in the middle of the lower clamping surface of the cutting tool. The length of the small face is marked as D0, and the width of the lower clamping surface, i.e., the distance between the left curved surface 433 of the lower clamping jaw and the right curved surface 434 of the lower clamping jaw, is marked as D1. The horizontal distance between the deepest point of the left meshing groove 101 of the lower clamping surface of the cutting tool and the deepest point of the right meshing groove 102 of the lower clamping surface of the cutting tool is marked as D2. The vertical distance between the lowest point of the left meshing groove 101 of the lower clamping surface of the cutting tool and the small protrusion 55 on the left side of the lower clamping surface of the cutting tool and the small protrusion 58 on the right side of the lower clamping surface of the cutting tool is marked as H10, and the distance between the lowest point of the left meshing groove 101 of the lower clamping surface of the cutting tool and the plane 74 is marked as H9.

[0150] See also Figure 8 As shown, the clamping surface 13 on the cutting tool is mainly composed of a small protrusion 44 on the left side of the clamping surface of the cutting tool, a small pit 45 on the left side of the clamping surface of the cutting tool, a first protrusion 46, a small pit 47 on the right side of the clamping surface of the cutting tool, and a small protrusion 48 on the right side of the clamping surface of the cutting tool to form a complex curved surface, wherein the small protrusion 44 on the left side of the clamping surface of the cutting tool, the small pit 45 on the left side of the clamping surface of the cutting tool and the small pit 47 on the right side of the clamping surface of the cutting tool, and the small protrusion 48 on the right side of the clamping surface of the cutting tool are symmetrical along the middle longitudinal plane VP2, and the clamping surface of the cutting tool is symmetrical. The narrow groove formed by the small protrusion 44 on the left side of the surface, the small pit 45 on the left side of the clamping surface of the cutting tool and the inclined surface 51 on the left side of the first protrusion is the composite meshing groove 103 on the left side of the clamping surface of the cutting tool. The narrow groove formed by the small protrusion 58 on the right side of the clamping surface of the cutting tool, the small pit 59 on the right side of the clamping surface of the cutting tool and the inclined surface 52 on the right side of the first protrusion is the composite meshing groove 104 on the right side of the clamping surface of the cutting tool. The composite meshing groove 103 on the left side of the clamping surface of the cutting tool and the composite meshing grooves 104 on the left and right sides of the clamping surface of the cutting tool are also symmetrical along the middle longitudinal plane VP2.

[0151] The first curved surface 49 of the small protrusion 44 on the left side of the clamping surface of the cutting tool and the fifth curved surface 54 form a slot with an angle of γ, and γ≥90°, and the third curved surface 50 and the seventh curved surface 53 form a slot with an angle of δ, and δ≤120°. The angle of the slot formed by the left oblique curved surface 51 of the first protrusion and the right oblique curved surface 52 of the first protrusion is ε°, and ε≥130°.

[0152] The width of the upper clamping surface, i.e., the distance between the left curved surface 431 of the upper clamping jaw and the right curved surface 432 of the upper clamping jaw, is marked as D3. It should be noted that the widths of the upper and lower clamping surfaces are not necessarily equal, i.e., D1 is not necessarily the same as D3. The horizontal distance between the highest point of the small protrusion 44 on the left side of the clamping surface of the cutting tool and the highest point of the small protrusion on the right side of the clamping surface of the cutting tool is marked as D4, the horizontal distance between the deepest point of the small pit 45 on the left side of the clamping surface of the cutting tool and the deepest point of the small pit 47 on the right side of the clamping surface of the cutting tool is marked as D5, the vertical distance between the highest point of the small protrusion 44 on the left side of the clamping surface of the cutting tool, the small pit 48 on the right side of the clamping surface of the cutting tool and the lowest point of the small pit 45 on the left side of the clamping surface of the cutting tool, the small pit 45 on the left side of the clamping surface of the cutting tool, and the small pit 47 on the right side of the clamping surface of the cutting tool is marked as H8, and the vertical distance between the highest point of the first protrusion 46 and the lowest point of the small protrusion 44 on the left side of the clamping surface of the cutting tool, and the small protrusion 44 on the right side of the clamping surface of the cutting tool is marked as H7.

[0153] See also Figure 1 , Figure 2 As shown, the cutting insert Ⅰ is arranged in a slender manner along the longitudinal axis AS1, and comprises: a cutting insert cutting head 4 and a cutting insert clamping handle 3. The cutting insert cutting head 4 comprises a first rear longitudinal positioning surface 151 and a second rear longitudinal positioning surface 152. The longitudinal axis AS1 is located in the cutting insert Ⅰ, passes through the cutting insert cutting head 4, and intersects with the rear longitudinal positioning surface 151. The cutting insert clamping handle 3 comprises a cutting insert upper clamping surface 6 and a cutting insert upper clamping surface 5, as well as a cutting insert clamping handle left side surface 436 and a cutting insert clamping handle right side surface 435. The upper clamping surface 6 is divided into a front half 61 and a rear half 62. The front half 61 has an angle of 2-5° with the longitudinal axis, and the rear half 62 also has an angle of 2-5° with the longitudinal axis, and the two roughly form an obtuse protrusion. The contours of the front half 61 and the rear half 62 are spline lines, forming a circular arc convex structure that is high in the middle and short at both ends. The lower clamping surface 5 of the cutting blade is arranged parallel to the longitudinal axis AS1. The middle transverse plane VP1 passes through the lower clamping surface 5 of the cutting blade and the upper clamping surface 6 of the cutting blade, and is the symmetry plane of the cutting blade I.

[0154] See also Figure 3 As shown, the middle longitudinal plane VP3 is located between the left side surface 436 of the cutting insert clamping handle and the right side surface 435 of the cutting insert clamping handle, and the distance between them is equal. The upper clamping horizontal plane PU1 passes through the highest point of the upper clamping surface 6 of the cutting insert, and the upper clamping horizontal plane PU2 passes through the lowest point of the upper clamping surface 6. The distance between the upper clamping horizontal plane PU1 and the upper clamping horizontal plane PU2 is marked as H1, and the lower clamping horizontal plane PL passes through the lowest point of the lower clamping surface 5 of the cutting insert.

[0155] See also Figure 1 and Figure 3 See Figure 5 As shown, the lower clamping surface 5 of the cutting blade is mainly composed of a small pit 34 on the left side of the cutting blade, a small protrusion 35 on the left side of the cutting blade, a second recess 36, a small protrusion 38 on the right side of the lower clamping surface of the cutting blade, and a small pit on the right side of the lower clamping surface of the cutting blade to form a complex curved surface. The small pit 34 on the left side of the cutting blade, the small protrusion 35 on the left side of the cutting blade, and the small pit 37 on the right side of the lower clamping surface of the cutting blade are symmetrical along the middle longitudinal plane VP2. The convex teeth formed by the small pit 34 on the left side of the cutting blade, the small protrusion 35 on the left side of the cutting blade and the ninth curved surface 40 are the composite meshing teeth 105 on the left side of the lower clamping surface of the cutting blade; the convex teeth formed by the small protrusion 38 on the right side of the lower clamping surface of the cutting blade, the small pit 37 on the right side of the lower clamping surface of the cutting blade and the eleventh curved surface 41 are the composite meshing teeth 106 on the right side of the lower clamping surface of the cutting blade. The composite meshing teeth 105 on the left side of the lower clamping surface of the cutting blade and the composite meshing teeth 106 on the right side of the lower clamping surface of the cutting blade are also symmetrical along the middle longitudinal plane VP2. The angle of the narrow groove formed by the right side inclined surface 39 of the small pit on the left side of the lower clamping surface of the cutting blade and the left side inclined surface 42 of the small pit on the right side of the lower clamping surface of the cutting blade is α′, and α′≥60°. The angle of the narrow groove formed by the ninth curved surface 40 and the eleventh curved surface 41 is β′, and β′≤160°.

[0156] The width of the lower clamping surface 5 of the cutting blade, that is, the lower horizontal distance between the right side surface 435 of the cutting blade clamping handle and the left side surface 436 of the cutting blade clamping handle is marked as D1′, the horizontal distance between the highest point of the left side compound meshing tooth 105 of the lower clamping surface of the cutting blade and the highest point of the right side compound meshing tooth 106 of the lower clamping surface of the cutting blade is marked as D2′, the vertical distance between the lower clamping horizontal plane PL and the lowest point of the small pit 34 on the left side of the lower clamping surface of the cutting blade and the small pit 37 on the right side of the lower clamping surface of the cutting blade is marked as H5, and the vertical distance between the lower clamping horizontal plane PL and the lowest point of the second recess 36 is marked as H4.

[0157] See also Figure 4As shown, the clamping surface 6 on the cutting blade is mainly composed of a small protrusion 27 on the left side of the clamping surface of the cutting blade, a small pit 28 on the left side of the clamping surface of the cutting blade, a small protrusion 29 on the left part of the clamping surface of the cutting blade, a large pit 30 in the middle of the clamping surface of the cutting blade, a small protrusion 33 on the right part of the clamping surface of the cutting blade, a small pit 32 on the right side of the clamping surface of the cutting blade, and a small protrusion 31 on the right side of the clamping surface of the cutting blade, which is a complex curved surface. Among them, the small protrusion 27 on the left side of the clamping surface of the cutting blade, the small pit 28 on the left side of the clamping surface of the cutting blade, the small protrusion 29 on the left part of the clamping surface of the cutting blade, the small protrusion 33 on the right part of the clamping surface of the cutting blade, the small pit 32 on the right side of the clamping surface of the cutting blade, and the small protrusion 31 on the right side of the clamping surface of the cutting blade are symmetrical along the middle longitudinal plane VP2. The complex convex teeth formed by the small protrusion 27 on the left side of the clamping surface of the cutting blade, the small pit 28 on the left side of the clamping surface of the cutting blade, the small protrusion 29 on the left side of the clamping surface of the cutting blade and the left side oblique surface 25 of the large pit in the middle of the clamping surface of the cutting blade are the composite meshing teeth 107 on the left side of the clamping surface of the cutting blade. The complex convex teeth formed by the small protrusion 31 on the right side of the clamping surface of the cutting blade, the small pit 32 on the right side of the clamping surface of the cutting blade, the small protrusion 33 on the right side of the clamping surface of the cutting blade and the right side oblique surface 26 of the large pit in the middle of the clamping surface of the cutting blade are the composite meshing teeth 108 on the right side of the clamping surface of the cutting blade. The composite meshing teeth 107 on the left side of the clamping surface of the cutting blade and the composite meshing teeth 108 on the right side of the clamping surface of the cutting blade are also symmetrical along the middle longitudinal plane VP2.

[0158] The angle of the narrow groove formed by the second curved surface 21 and the left inclined surface of the small protrusion on the right side of the clamping surface on the cutting blade is γ′, and γ′≤130°. The angle of the narrow groove formed by the fourth curved surface 23 and the eighth curved surface 24 is δ′, and δ′≥60°. The angle of the narrow groove formed by the left inclined surface 25 of the large pit in the middle part of the clamping surface on the cutting blade and the right inclined surface 26 of the large pit in the middle part of the clamping surface on the cutting blade is ε′, and ε′≥135°.

[0159] The width of the clamping surface 6 on the cutting blade, that is, the upper horizontal distance between the right side surface 435 of the clamping handle of the cutting blade and the left side surface 436 of the clamping handle of the cutting blade is marked as D3′, the horizontal distance between the lowest point of the small pit 28 on the left side of the clamping surface of the cutting blade and the lowest point of the small pit 32 on the right side of the clamping surface of the cutting blade is marked as D4′, the horizontal distance between the highest point of the small protrusion 29 on the left side of the clamping surface of the cutting blade and the highest point of the small protrusion 33 on the right side of the clamping surface of the cutting blade is marked as D5′, the vertical distance between the upper clamping horizontal plane PU1 and the lowest point of the first recess 30 is marked as H2, the vertical distance between the lowest point of the small pit 28 on the left side of the clamping surface of the cutting blade and the highest point of the small protrusion 29 on the left side of the clamping surface of the cutting blade is marked as H3, that is, the vertical distance between the lowest point of the small pit 32 on the right side of the clamping surface of the cutting blade and the highest point of the small protrusion 33 on the right side of the clamping surface of the cutting blade is also H3.

[0160] See also Figure 1 , Fig.10 As shown, the cutting insert I can slide along the longitudinal axis AS1 in the disengagement direction DW and the insertion direction DL, and the cutting tool II contacts the tail longitudinal positioning surface 151 of the cutting insert I through the tail longitudinal limiting surface 92 in the DL direction, limiting the further displacement of the cutting insert I in the longitudinal insertion direction DL when the force is applied. The cutting tool II contacts the front half 131 of the upper clamping surface of the cutting tool included in the upper clamping jaw 7 in the Dw direction with the front half 61 of the upper clamping surface 6 of the cutting insert I, limiting the further displacement of the cutting insert I in the longitudinal insertion direction Dw when the force is applied. The rear half 132 of the upper clamping surface of the cutting tool included in the upper clamping jaw 7 of the cutting tool II does not contact the rear half 62 of the upper clamping surface 6 of the cutting insert I.

[0161] See also Fig.11 As shown, the upper clamping surface 13 of the cutting tool forms a meshing area A with the composite meshing teeth 107 on the left side of the upper clamping surface of the cutting blade through the composite meshing groove 103 on the left side of the upper clamping surface of the cutting tool, and the upper clamping surface 13 of the cutting tool forms a meshing area B with the composite meshing teeth 108 on the right side of the upper clamping surface of the cutting blade through the composite meshing groove 104 on the right side of the upper clamping surface of the cutting tool. The meshing area A and the meshing area B are symmetrical along the middle longitudinal plane VP2. The lower clamping surface 14 of the cutting tool forms a meshing area C with the composite meshing teeth 105 on the left side of the lower clamping surface of the cutting blade and the composite meshing teeth 106 on the right side of the lower clamping surface of the cutting blade through the meshing groove 101 on the left side of the lower clamping surface of the cutting tool and the meshing groove 102 on the right side of the lower clamping surface of the cutting tool. The center of the meshing area C is located in the middle longitudinal plane VP2. The meshing areas A, B, and C form an inverted triangle stable structure.

[0162] For further information, see Figure 1 and Figure 3See Fig.13 As shown, when the lower clamping surface 14 of the cutting tool and the lower clamping surface 5 of the cutting insert are meshed and assembled, the ninth curved surface 40 is completely in contact with the tenth curved surface 71, and the eleventh curved surface 41 is also completely in contact with the twelfth curved surface 72, ensuring that the cutting insert I can be centered on the cutting tool II. The distance between the plane 74 and the lowest point of the second recess 36 is H14, 0.05mm≤H14≤0.15mm. The small pit 34 on the left side of the cutting insert does not contact the small protrusion 55 on the left side of the lower clamping surface of the cutting tool, and similarly, the right side does not contact. The lowest point of the left side of the lower clamping surface 14 of the cutting tool, the small pit 56 on the left side of the lower clamping surface of the cutting tool, and the small pit 59 on the right side of the lower clamping surface of the cutting tool and the highest point of the left side of the lower clamping surface of the cutting insert I, the small protrusion 35 on the left side of the lower clamping surface of the cutting insert, and the small protrusion 38 on the right side of the lower clamping surface of the cutting insert are vertically distanced H12, 0.02mm≤H12≤0.1mm. The vertical distance between the highest point of the left side of the lower clamping surface 14 of the cutting tool, the small protrusion 55 on the left side of the lower clamping surface of the cutting tool, and the small protrusion 58 on the right side of the lower clamping surface of the cutting tool and the lowest point of the small pit 34 on the left side of the cutting blade and the small pit 37 on the right side of the lower clamping surface of the cutting blade is H11, 0.02mm≤H11≤0.13mm;

[0163] The minimum distance between the right side inclined surface 70 of the small protrusion on the left side of the lower clamping surface of the cutting tool and the right side inclined surface 39 of the small pit on the left side of the lower clamping surface of the cutting insert is H13. Similarly, the minimum distance between the left side inclined surface 73 of the small protrusion on the right side of the lower clamping surface of the cutting tool and the left side inclined surface 42 of the small pit on the right side of the lower clamping surface of the cutting insert is also H13, 0.02mm≤H13≤0.08mm.

[0164] Furthermore, angle α and angle α′ are not necessarily equal, and angle β and β′ are equal. D1 is generally equal to D1′, but in special cases, D1 and D1′ are not equal. D2>D2′. That is, a "W"-shaped structure is formed, in which the middle area is used for positioning and guiding, and the side areas on the left and right sides supplement the guiding function to limit the left and right displacement of the cutting blade I on the cutting tool II. This structure also improves the overall clamping force of the cutting blade I. The direction of the force of the middle area on the cutting blade I is toward the outside of the blade, and the direction of the force of the side areas on the left and right sides on the cutting blade I is toward the inside of the blade when the screw is tightened. After the force is neutralized, the force on the cutting blade I to the outside of the blade is reduced, which can protect the slender cutting blade I from splitting. Conversely, when the cutting blade I is subjected to a lateral force, the force is dispersed to avoid excessive load on the cutting tool II.

[0165] See also Fig.12As shown, when the upper clamping surface 13 of cutting tool II and the upper clamping surface 6 of cutting insert I are meshed and assembled, on the left side of the middle longitudinal plane VP2, the first curved surface 49 is in full contact with the second curved surface 21, and the third curved surface 50 is in full contact with the fourth curved surface 23, and the two form an obtuse groove; on the right side of the middle longitudinal plane VP2, the fifth curved surface 54 is in full contact with the sixth curved surface 22; the curved surface 53 is in full contact with the fourth curved surface 24, and the two also form an obtuse groove. It is ensured that the cutting insert I can be centered on the cutting tool II. The vertical distance between the highest point of the large protrusion 46 in the middle of the clamping surface 13 on the cutting tool and the lowest point of the first recess 30 is H16, 0.08mm≤H16≤0.15mm. The vertical distance between the highest point of the small protrusion 44 on the left side of the clamping surface of the cutting tool and the small protrusion 48 on the right side of the clamping surface of the right cutting tool and the lowest point of the small pit 28 on the left side of the clamping surface of the cutting blade and the small pit 32 on the right side of the clamping surface of the cutting blade is H17, 0.03mm≤H17≤0.08mm, the vertical distance between the lowest point of the small protrusion 44 on the left side of the clamping surface of the cutting tool and the small protrusion 48 on the right side of the clamping surface of the cutting tool and the highest point of the small protrusion 27 on the left side of the clamping surface of the cutting blade and the small protrusion 31 on the right side of the clamping surface of the cutting blade is H18, 0.03mm≤H18≤0.1mm. The left side inclined surface 51 of the first protrusion on the clamping surface 13 of the cutting tool does not contact the left side inclined surface 25 of the large pit in the middle part of the upper clamping surface of the cutting blade of the upper clamping surface 6 of the cutting blade I. Similarly, the right side inclined surface 52 of the first protrusion does not contact the fourth curved surface 24. The minimum distance between the right side inclined surfaces 52 of the first protrusion is H15, 0.05mm≤H15≤0.13mm.

[0166] Furthermore, angles γ and γ′ are equal, angles δ and δ′ are equal, and angles ε and ε′ are not necessarily equal. D3 is generally equal to D3′, but in special cases, D3 and D3′ are not equal. D4>D4′, D5<D5′, that is, a kind of "wave" structure is formed, which is positioned and guided by the side areas on the left and right sides, and the middle area supplements the guiding function to limit the left and right displacement of the cutting blade I on the cutting tool II. This structure also improves the overall clamping force of the cutting blade I. The direction of the force of the side areas on the left and right sides on the cutting blade I is dispersed, and the direction of the force of the middle area on the cutting blade I is toward the outside of the blade when the screw is tightened. The left and right side structures ensure the good centering positioning of the blade, and at the same time, with the non-contact area in the middle, when the cutting blade I is subjected to lateral force, the force is dispersed to avoid excessive load on the cutting tool II and prevent the blade from shifting left and right.

[0167] See also Fig.14 and Fig.10As shown, when the screws are not tightened, the upper clamping surface 13 of the cutting tool II and the upper clamping surface 6 of the cutting blade I have no contact at the tail end, forming a gap 201, because the angle between the front half 131 of the upper clamping surface of the cutting tool and the longitudinal axis is slightly larger than the angle between the upper clamping surface 61 of the cutting blade I and the longitudinal axis. This structure can effectively prevent the upper clamping jaw 7 from being elastically deformed after the screws are tightened, with the tail end contacting first and the head end lifting up, causing a loss of clamping force, thereby better limiting the displacement of the blade along the length direction. At the same time, this structure can also facilitate the cutting blade I to be smoothly inserted into the receiving groove 0 when the elliptical groove 12 is expanded using a wrench and the upper clamping jaw 7 is lifted.

[0168] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the main purpose of the present application, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A cutting tool, comprising a cutting tool and a cutting insert, characterized in that: The cutting tool is provided with a receiving groove at one end. The top of the receiving groove and the top of the cutting blade form a first meshing area, a second meshing area and a first non-contact area; The bottom of the receiving groove and the bottom of the cutting insert form a second non-contact area, a third meshing area, and a third non-contact area; A stable structure is formed among the first meshing area, the second meshing area and the third meshing area.

2. A cutting tool according to claim 1, characterized in that: The first meshing area is formed by an meshing groove at the top of the receiving groove and an meshing tooth at the top of the cutting blade, and the second meshing area is formed by two meshing grooves at the top of the receiving groove and two meshing teeth at the top of the cutting blade; the first non-contact area is formed between the first meshing area and the second meshing area.

3. A cutting tool according to claim 1, characterized in that: The third meshing area is formed by two meshing grooves at the bottom of the receiving groove and one meshing tooth at the bottom of the cutting blade, and the second non-contact area and the third non-contact area are respectively formed at two ends of the third meshing area.

4. A cutting tool according to claim 1, characterized in that: The first meshing area includes a first curved surface at the top of the receiving groove and a second curved surface at the top of the cutting blade, as well as a third curved surface at the top of the receiving groove and a fourth curved surface at the top of the cutting blade. The first curved surface and the second curved surface are in sealing contact with each other, and the third curved surface and the fourth curved surface are in sealing contact with each other; an obtuse-angle groove is formed between the first curved surface, the second curved surface and the third curved surface and the fourth curved surface.

5. A cutting tool according to claim 4, characterized in that: The second meshing area includes a fifth curved surface at the top of the receiving groove and a sixth curved surface at the top of the cutting blade, as well as a seventh curved surface at the top of the receiving groove and an eighth curved surface at the top of the cutting blade. The fifth curved surface and the sixth curved surface are in sealing contact with each other, and the seventh curved surface and the eighth curved surface are in sealing contact with each other; an obtuse-angle groove is formed between the fifth curved surface, the sixth curved surface and the seventh curved surface and the eighth curved surface.

6. A cutting tool according to claim 5, characterized in that: A first convex portion is formed between the third curved surface and the seventh curved surface at the top of the receiving groove, and a first concave portion is formed between the fourth curved surface and the eighth curved surface at the top of the cutting blade. The first convex portion does not contact the first concave portion, and the distance between the first convex portion and the first concave portion is H16.

7. A cutting tool according to claim 6, characterized in that: The third meshing area includes a ninth curved surface at the bottom of the receiving groove and a tenth curved surface at the bottom of the cutting blade, the ninth curved surface and the tenth curved surface are in sealing contact with each other, as well as an eleventh curved surface at the bottom of the receiving groove and a twelfth curved surface at the bottom of the cutting blade, the eleventh curved surface and the twelfth curved surface are in sealing contact with each other.

8. A cutting tool according to claim 7, characterized in that: A second concave portion is formed between the ninth curved surface and the eleventh curved surface, a plane is formed between the tenth curved surface and the twelfth curved surface, the second concave portion is not in contact with the plane, and a distance between the second concave portion and the plane is H14.

9. A cutting tool according to claim 8, characterized in that: The second non-contact area and the third non-contact area are symmetrically arranged on both sides of the third meshing area. The distance between the highest points of two adjacent curved surfaces in the second non-contact area and the third non-contact area is H11, and the distance between the lowest points of two adjacent curved surfaces in the second non-contact area and the third non-contact area is H12.

Images