CN221538213U - Drop height type high-precision milling comprehensive milling cutter - Google Patents

Abstract

The utility model discloses a fall type high-precision milling comprehensive milling cutter, which comprises a cutter body, a peripheral edge and cutter teeth, wherein the peripheral edge is arranged at the front section of the cutter body, and the cutter teeth are arranged at the front end of the peripheral edge, and the fall type high-precision milling comprehensive milling cutter is characterized in that: the edge of the cutter tooth tip is provided with a first protection angle section, a second protection angle section and a third protection angle section, intersection points of the first protection angle section, the second protection angle section and the third protection angle section form an intersection angle cutter point, the front end face of the cutter tooth tip is provided with a cutter point facet, and a trimming height fall is arranged between the cutter point facet and the intersection angle cutter point, so that the cutter point facet carries out fine grinding and trimming processing. By improving the structure of the tip part of the cutter tooth, the intersection angle cutter point and the cutter point facet with fine height fall are formed, the processing performance of the milling cutter is improved, and high-precision face milling processing can be performed on low carbon steel, stainless steel and the like (soft steel with HRC less than 40 degrees).

Description

Drop height type high-precision milling comprehensive milling cutter

Technical Field

The utility model relates to a structure of a comprehensive milling cutter, in particular to a fall type high-precision milling comprehensive milling cutter.

Background

In a conventional milling cutter, the cutter tip and the end face of the cutter tip are in a flush structure, and when the milling cutter is used for processing low-carbon steel (mild steel) with Rockwell hardness HRC below 40, generally, only rough machining with surface roughness of more than Ra1.6 can be performed. If a lower roughness value and a better finish are to be achieved, a grinding machine must be used for a further finish. Moreover, because the tip of the cutter tooth is level with the end face, stress is concentrated during cutting, stress is uneven, repeated cutting is easy to generate, the finish degree and the roughness value of the processed surface are unstable, and the service life and the product quality of the milling cutter are affected seriously.

Disclosure of utility model

In view of the above-mentioned drawbacks, an object of the present utility model is to provide a fall type high-precision milling integrated milling cutter capable of improving the structure of the tip end portion of a cutter tooth, forming a corner cutting edge and a cutting edge facet having a fine height fall, improving the milling cutter workability, and performing high-precision face milling on low-carbon steel (mild steel).

The utility model adopts the technical scheme that: the drop type high-precision milling comprehensive milling cutter comprises a cutter body, a peripheral edge and cutter teeth, wherein the peripheral edge is arranged at the front section of the cutter body, and the cutter teeth are arranged at the front end of the peripheral edge;

The edge of the cutter tooth tip is provided with a first protection angle section, a second protection angle section and a third protection angle section, intersection points of the first protection angle section, the second protection angle section and the third protection angle section form an intersection angle cutter point, the front end face of the cutter tooth tip is provided with a cutter point facet, and a trimming height fall is arranged between the cutter point facet and the intersection angle cutter point, so that the cutter point facet carries out fine grinding and trimming processing.

Here, the corner point is formed by processing a first protection corner section, a second protection corner section, and a third protection corner section at the edge of the tip end of the cutter tooth, and the first protection corner section, the second protection corner section, and the third protection corner section are formed by intersecting the protection corner sections (or edges) (that is, the front corner edge, the auxiliary corner edge, and the three-edge chamfer of the end tooth bottom edge form a new cutter point angle), and a fine height fall is formed between the cutter point facet and the corner point due to the existence of the protection corner sections. Thus, the cutter point works, rough gnawing and rough machining are performed, a fine allowance is left, the small plane of the cutter point is polished and fine-ground, and the finish degree of milling cutter machining is ensured.

It should be noted that, for the first protection corner section, the second protection corner section, and the third protection corner section, they are not necessarily absolute planes (i.e., cross sections), but rather, a certain inclination or camber is allowed to be provided at the front end of a protection corner section when forming an intersection point, so as to better enable the edge intersection points of the first protection corner section, the second protection corner section, and the third protection corner section to form the intersection point. Of course, the three protection corner facets are at least a number, not excluding that four or even five protection corner facets may be employed, with the intersection points of these protection corner facets forming the intersection point. Although the use of four or even five protective chamfer cuts reduces the strength of the corner tips to some extent, these solutions are all possible and include at least three protective chamfer cuts. In summary, the purpose of the design of the structure is to form a new point angle (i.e. an intersection point) and to make a fine fall between the new point angle and the point facet while processing three edges of the front corner edge, the auxiliary corner edge and the end tooth bottom edge of the cutting edge to protect the chamfer.

As a preferable scheme, the first side line and the second side line of the knife point facet correspond to the first protection angle section and the second protection angle section respectively, and the lengths of the first side line and the second side line of the knife point facet are 5% -7% of the diameter of the knife body respectively; the height drop of the fine trimming between the knife point facet and the intersection knife point is 0.002-0.01mm, so that the knife point facet is subjected to fine grinding and trimming processing. The small plane of the cutter point is used as a plane of a finishing structure, the length and the width of the cutter point are not excessively large, and the most preferable is that the diameter of the cutter body is 5% -7%; moreover, the height difference between the facet of the tip and the tip of the angle of intersection can be only a slight height difference, otherwise no finishing effect can be achieved, wherein a height difference of 0.002-0.01mm is most preferred. Of course, if the cutter body diameter is relatively large, it is also feasible to finish the height drop slightly more than 0.01mm, but the height drop cannot be too large, otherwise the finishing effect is affected. In addition, the arrangement has the following advantages: on the basis of fine height fall of the knife tip facet and the intersection knife tip, the first side line and the second side line are mutually associated and correspond to the first protection angle section and the second protection angle section, so that the first side line and the second side line are respectively used as transition edges of the knife tip facet, the first protection angle section and the second protection angle section, the effect of edge cutting is achieved, and the finishing effect of the knife tip facet is further improved. In addition, the height difference between the edge facet and the intersection edge is formed by the first, second, and third protection corner sections (i.e., the three-edge chamfer), and therefore, the three-edge chamfer width is also 0.002-0.01mm.

Preferably, the nose facet is a triangular nose facet, wherein the length of the first edge line and the length of the second edge line of the nose facet are equal. The knife point facet is subjected to finishing processing, and has a wear rule, and the wider and more serious the positions of the first side line and the second side line are, so that the knife point facet is designed into a triangular knife point facet, and the wear rule during processing can be well adapted. It should be emphasized here that the length of the first and second edges of the nose facet is controlled to be 5% -7% of the diameter of the cutter body, and the triangular design is also an important reason for optimizing the chip removal problem of the nose facet during finishing. If the lengths of the first side line and the second side line of the cutter point facet are too long, the cutter point facet is too wide, the problem of chip extrusion can easily occur during processing, the processing effect is affected, and the service life of the cutter point facet is also affected.

As a preferable scheme, the vertex of the triangular knife point facet and the intersection angle knife point are respectively positioned at two end points of a new edge formed by intersecting the first protection angle section and the second protection angle section. When the vertex of the triangular knife point facet is used as a cutting point when the knife point facet is finished, and the vertex and the intersection knife point are positioned at two ends of the same edge, the edge plays a role of cutting into a micro-blade, and the processing effect is greatly improved. The vertex of the small plane of the triangular knife tip and the intersection angle knife tip are respectively positioned at a new edge formed by the intersection of the first protection angle section and the second protection angle section and can be used as a cutting micro-edge, so that the cutting edge can be cut, and the triangular knife tip is an excellent optimized structure.

As a preferable scheme, the peripheral edge comprises four spirally distributed cutter teeth, and the cutter teeth comprise a main tooth group and an auxiliary tooth group which are distributed in a crossed manner; the main tooth group comprises a first main tooth and a second main tooth, and the auxiliary tooth group comprises a first auxiliary tooth and a second auxiliary tooth; the first main teeth and the second main teeth are high-edge, and the first auxiliary teeth and the second auxiliary teeth are low-edge. The technical improvement of arranging the intersection angle tool nose and the tool nose facet at the tip end part is applicable to milling cutters with more than two peripheral edges. But is preferably applied to a four-edged milling cutter. The main tooth group and the auxiliary tooth group are designed into high teeth and low teeth, so that the knife tip facet of the high teeth works first, and after the loss of the knife tip facet of the high teeth is finished, the knife tip facet of the low teeth works next, and the finishing service life of the milling cutter can be greatly prolonged. It should be noted that even if the facets of the tips of the high teeth and the low teeth are worn, the milling cutter can still be used for rough milling, and although the finish cannot be very high, the basic machining precision is not problematic as that of the common cutter. Therefore, the service life of the fall type high-precision milling comprehensive milling cutter can reach more than tens of times of that of a common milling cutter.

Preferably, the height difference is formed between the knife edge facet of the first main tooth and the knife edge facet of the second main tooth and the knife edge facet of the first auxiliary tooth and the knife edge facet of the second auxiliary tooth, wherein the knife edge facet of the first main tooth and the knife edge facet of the second main tooth are 0.1-0.3mm higher than the knife edge facet of the first auxiliary tooth and the knife edge facet of the second auxiliary tooth. The area of the knife tip facet is not too large, and the height fall between the knife tip facet of the high tooth and the knife tip facet of the low tooth is not too large, so that the knife tip facet of the low tooth needs to enter into operation after the loss of the knife tip facet of the high tooth is 0.1-0.3mm. Otherwise, the chip-extruding problem is caused by the increase of the area after the loss of the small plane of the tool nose. Therefore, the height difference between the nose facets of the high teeth and the low teeth is controlled to be 0.1-0.3mm.

As a preferable scheme, the peripheral edge is of an unequal spiral and variable pitch structure, so that the angle between the intersection angle of the first main tooth and the intersection angle of the first auxiliary tooth is 95 degrees, the angle between the intersection angle of the first auxiliary tooth and the intersection angle of the second main tooth is 85 degrees, the angle between the intersection angle of the second main tooth and the intersection angle of the second auxiliary tooth is 95 degrees, and the angle between the intersection angle of the second auxiliary tooth and the intersection angle of the first main tooth is 85 degrees. The stress of the peripheral edge is dispersed during cutting, the machining effect of the cutter is improved, and the service life of the cutter is prolonged.

As a preferable scheme, the core diameter of the cutter body at the peripheral edge section is in taper arrangement with small front end and large tail end. The integral strength of the cutter is improved.

As a preferable scheme, the peripheral edge is an arc relief angle. The cutting performance and the stress intensity of the peripheral edge are improved, and the cutting effect of the peripheral edge is ensured.

As an alternative, only the first main tooth and the second main tooth are provided with an intersection point and a point facet at the tip end, and the first auxiliary tooth and the second auxiliary tooth are not provided with the intersection point and the point facet at the tip end; the knife tip facets of the first main tooth and the second main tooth are provided with height differences between the knife tip facets of the first auxiliary tooth and the second auxiliary tooth, wherein the knife tip facets of the first main tooth and the second main tooth are higher than the end faces of the first auxiliary tooth and the second auxiliary tooth by 0.1-0.3mm. It should be noted that, the design is based on the alternative scheme that the high teeth and the low teeth are provided with the angle knife tip and the knife tip facet, and the service life of the cutter is slightly poorer, but the angle knife tip and the knife tip facet are arranged at the tip part of the high teeth (namely the first main teeth and the second main teeth), so that the rough gnawing and the finish can still be realized.

The utility model has the following advantages: the cutter tooth tip is provided with the first protection angle section, the second protection angle section and the third protection angle section, so that edges of the sections meet, an intersection angle cutter point is formed at an end point, the cutter point facet arranged on the front end face of the upper cutter tooth tip is matched, the fine height fall between the cutter point facet and the intersection angle cutter point is utilized, the processing performance of the milling cutter is improved, high-precision face milling processing can be carried out on low-carbon steel (mild steel), the surface roughness of the low-carbon steel (mild steel) is enabled to be lower than RA0.4, and the brightness of the low-carbon steel (mild steel) is similar to that of a mirror surface. Moreover, the service life of the cutter is also obviously prolonged.

The utility model is further described with reference to the following description and detailed description of the drawings.

Drawings

FIG. 1 is a schematic view of the overall structure of a drop-type high-precision milling integrated cutter;

FIG. 2 is an enlarged schematic view of the tip portion of the cutter tooth;

FIG. 3 is a schematic side view of the structure of FIG. 1;

FIG. 4 is a schematic height head of the nose facet of the high tooth and low tooth;

FIG. 5 is an enlarged schematic view of portion C of FIG. 3;

fig. 6 is a schematic diagram of the structure of the front end face of the drop-type high-precision milling integrated milling cutter;

FIG. 7 is an enlarged partial schematic view of portion B of FIG. 6;

FIG. 8 is a schematic cross-sectional view of a drop height high finish milling integrated milling cutter;

FIG. 9 is a schematic cross-sectional view of the peripheral edge;

FIG. 10 is a schematic view of wear of the nose facet during processing;

In the figure: a cutter body 1; a peripheral edge 2; cutter teeth 3; a first protection angle cut 31; a second protective chamfer 32; a third protective chamfer 33; an angle of intersection nose 34; a nose facet 35; a first edge 351; a second edge 352; a first main tooth 3a; a second main tooth 3b; a first sub-tooth 3c; a second sub-tooth 3d; a first wire frame region 35a; a second wire frame region 35b; the first and second protective corner cuts intersect the new edge 4.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the embodiment of the present utility model, directional indications (such as up, down, left, right, front, back, top, bottom, inner, outer, vertical, lateral, longitudinal, counterclockwise, clockwise, circumferential, radial, axial … …) are referred to, and the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first" or "second" etc. in the embodiments of the present utility model, the description of "first" or "second" etc. is only for descriptive purposes, and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1 to 10, the drop height type high-precision milling comprehensive milling cutter provided by the embodiment comprises a cutter body 1, a peripheral edge 2 and cutter teeth 3, wherein the peripheral edge 1 is arranged at the front section of the cutter body 1, and the cutter teeth 3 are arranged at the front end of the peripheral edge 2;

The three edges of the front corner edge, the auxiliary corner edge and the end tooth bottom edge of the cutting edge are chamfered, so that a first protection corner tangent plane 31, a second protection corner tangent plane 32 and a third protection corner tangent plane 33 are formed at the edge of the cutter tooth tip part, an intersection angle cutter point 34 is formed at the edge intersection end points of the first protection corner tangent plane, the second protection corner tangent plane and the third protection corner tangent plane, a cutter point facet 35 is arranged on the front end surface of the cutter tooth tip part, and a finishing height fall is formed between the cutter point facet 35 and the intersection angle cutter point 34, so that the cutter point facet 35 performs finishing and grinding machining (namely, when a milling cutter performs machining, the cutter point facet plays a finishing and polishing role).

The intersection point is formed by processing a first protection angle section, a second protection angle section and a third protection angle section at the edge of the tip end of the cutter tooth, and is formed by intersecting edges, and a fine height fall is formed between the point facet and the intersection point due to the existence of each protection angle section. Thus, the cutter point works, rough gnawing and rough machining are performed, a fine allowance is left, the small plane of the cutter point is polished and fine-ground, and the finish degree of milling cutter machining is ensured.

It should be noted that, for the first protection corner section, the second protection corner section, and the third protection corner section, they are not necessarily absolute planes (i.e., cross sections), but rather, a certain inclination or camber is allowed to be provided at the front end of a protection corner section when forming an intersection point, so as to better enable the edge intersection points of the first protection corner section, the second protection corner section, and the third protection corner section to form the intersection point. Of course, the three protection corner facets are at least a number, not excluding that four or even five protection corner facets may be employed, with the intersection points of these protection corner facets forming the intersection point. Although the use of four or even five protective chamfer cuts reduces the strength of the corner tips to some extent, these solutions are all possible and include at least three protective chamfer cuts. In summary, the purpose of the design of the structure is to form a new point angle (i.e. an intersection point) and to make a fine fall between the new point angle and the point facet while processing three edges of the front corner edge, the auxiliary corner edge and the end tooth bottom edge of the cutting edge to protect the chamfer.

Specifically, referring to fig. 2, 5 and 7, the first edge 351 and the second edge 352 of the nose facet 35 respectively correspond to the first protection corner section 31 and the second protection corner section 32 (i.e., the nose facet respectively intersects the first protection corner section and the second protection corner section and respectively has a section of common edge), and the lengths of the first edge 351 and the second edge 352 of the nose facet are respectively 5% -7% of the diameter of the cutter body; the difference of the finishing height between the knife point facet 35 and the intersection knife point 34 is 0.002-0.01mm, so that the knife point facet is subjected to fine grinding and finishing processing. The knife tip facet is taken as a finishing structural plane, the length and the width of the knife are not excessively large, and 5% -7% of the diameter of the knife body is most preferable (in the embodiment, the diameter of the knife body is 10mm, and the first side line and the second side line are 0.6 mm); moreover, the height difference between the facet of the tip and the tip of the angle of intersection can be only a slight height difference, otherwise no finishing effect can be achieved, wherein a height difference of 0.002-0.01mm is most preferred. Of course, if the cutter body diameter is relatively large, it is also feasible to finish the height drop slightly more than 0.01mm, but the height drop cannot be too large, otherwise the finishing effect is affected. In addition, the arrangement has the following advantages: on the basis of fine height fall of the knife tip facet and the intersection knife tip, the first side line and the second side line are mutually associated and correspond to the first protection angle section and the second protection angle section, so that the first side line and the second side line are respectively used as transition edges of the knife tip facet, the first protection angle section and the second protection angle section, the effect of edge cutting is achieved, and the finishing effect of the knife tip facet is improved. In addition, the height difference between the edge facet and the intersection edge is formed by the first, second, and third protection corner sections (i.e., the three-edge chamfer), and therefore, the three-edge chamfer width is also 0.002-0.01mm.

More specifically, the nose facet 35 is a triangular nose facet, wherein the first edge line 351 and the second edge line 352 of the nose facet 35 are equal in length such that the nose facet forms an isosceles triangle. The knife point facet is subjected to finishing processing, and has a wear rule, and the wider and more serious the position close to the first side line is, so that the knife point facet is designed into a triangular knife point facet, and the wear rule during processing can be well adapted. It should be emphasized here that the length of the first and second edges of the nose facet is controlled to be 5% -7% of the diameter of the cutter body, and the triangular design is also an important reason for optimizing the chip removal problem of the nose facet during finishing. If the lengths of the first side line and the second side line of the cutter point facet are too long, the cutter point facet is too wide, the problem of chip extrusion can easily occur during processing, the processing effect is affected, and the service life of the cutter point facet is also affected.

Specifically, the vertex of the triangular nose facet 35 and the intersection angle nose 34 are located at two ends of a new edge (the first and second protection corner surfaces intersect the new edge 4) formed by intersecting the first protection corner surface 31 and the second protection corner surface 32. When the vertex of the triangular knife point facet is used as a cutting point when the knife point facet is finished, and the vertex and the intersection knife point are positioned at two ends of the same edge, the edge plays a role of cutting into a micro-blade, and the processing effect is greatly improved. The vertex of the small plane of the triangular knife tip and the intersection angle knife tip are respectively positioned at a new edge formed by the intersection of the first protection angle section and the second protection angle section and can be used as a cutting micro-edge, so that the cutting edge can be cut, and the triangular knife tip is an excellent optimized structure.

In this embodiment, the peripheral edge 2 includes four helically distributed teeth, and the cutter teeth 3 include a main tooth group and an auxiliary tooth group which are distributed in a crossed manner; the main tooth group comprises a first main tooth 3a and a second main tooth 3b, and the auxiliary tooth group comprises a first auxiliary tooth 3c and a second auxiliary tooth 3d; wherein the first main tooth 3a and the second main tooth 3b are high-edge, and the first auxiliary tooth 3c and the second auxiliary tooth 3d are low-edge. The technical improvement of providing the intersection point 34 and the point facet 35 at the tip portion is applicable to milling cutters with more than two peripheral edges. But is preferably applied to a four-edged milling cutter. The main tooth group and the auxiliary tooth group are designed into high teeth and low teeth, so that the knife tip facet of the high teeth works firstly, and after the loss of the knife tip facet of the high teeth is finished, the knife tip facet of the low teeth works next, thereby greatly prolonging the finishing service life of the milling cutter. It should be noted that even if the facets of the tips of the high teeth and the low teeth are worn, the milling cutter can still be used for rough milling, and although the finish cannot be very high, the basic machining precision is not problematic as that of the common cutter. Thus, the service life of the fall type high-precision milling comprehensive milling cutter can reach more than tens of times of that of a common milling cutter.

Specifically, referring to fig. 4 and 6, the height difference is formed between the nose facets of the first main tooth 3a and the second main tooth 3b and the nose facets of the first auxiliary tooth 3c and the second auxiliary tooth 3d, wherein the nose facets of the first main tooth 3a and the second main tooth 3b are higher than the nose facets of the first auxiliary tooth 3c and the second auxiliary tooth 3d by 0.1-0.3mm (0.2 mm is taken in the embodiment). The area of the knife tip facet is not too large, and the height fall between the knife tip facet of the high tooth and the knife tip facet of the low tooth is not too large, so that the knife tip facet of the low tooth needs to enter into operation after the loss of the knife tip facet of the high tooth is 0.1-0.3mm. Otherwise, the chip-extruding problem is caused by the increase of the area after the loss of the small plane of the tool nose. Therefore, the height difference between the nose facets of the high teeth and the low teeth is controlled to be 0.1-0.3mm.

Specifically, referring to fig. 6 and 8, the peripheral edge 2 has an unequal, unequal spiral and variable pitch structure, so that the angle between the intersection point of the first main tooth 3a and the intersection point of the first auxiliary tooth 3c is 95 ° and the angle between the intersection point of the first auxiliary tooth 3c and the intersection point of the second main tooth 3b is 85 °, the angle between the intersection point of the second main tooth 3b and the intersection point of the second auxiliary tooth 3d is 95 °, and the angle between the intersection point of the second auxiliary tooth 3d and the intersection point of the first main tooth 3a is 85 ° around the center of the cross section of the cutter body. The stress of the peripheral edge is dispersed during cutting, the machining effect of the cutter is improved, and the service life of the cutter is prolonged.

Specifically, referring to fig. 8, the core diameter of the cutter body 1 at the peripheral edge section is in a taper arrangement with a small front end and a large tail end. For example, in the present embodiment, if the core diameter of the leading end of the peripheral edge segment can be 6.9mm, the core diameter of the trailing end of the peripheral edge segment can be about 7 mm. By the design, the overall strength of the cutter can be improved.

Specifically, referring to fig. 9, the peripheral edge is a circular arc relief angle. The cutting performance and the stress intensity of the peripheral edge are improved, and the cutting effect of the peripheral edge is ensured.

The fall type high-precision milling comprehensive milling cutter provided by the embodiment:

And the three edges of the front corner edge, the auxiliary corner edge and the end tooth bottom edge are chamfered (0.02 mm-0.04 mm) (three chamfer sections are the first, second and third protection corner sections) to form a new cutter point angle (namely an intersection cutter point), and a cutter point facet is arranged, wherein the fall of the intersection cutter point and the cutter point facet is 0.03mm-0.09mm.

Referring to fig. 10, the edge facet 35 is divided into a first wire frame region 35a and a second wire frame region 35b, and the contact surface machining effect along the positive direction X in actual machining determines the roughness of the surface of the workpiece. The effect of the interface machining in the negative Z direction determines the durability, i.e. lifetime, of the surface of the machined material.

The third, the knife tip facet 35 is designed as an isosceles triangle, the side length is 0.6mm (6% of the diameter (D) of the knife), during the actual use, the first wire frame area 35a of the knife tip facet 35 participates in the finishing action of the production material to play a role in polishing, meanwhile, real-time abrasion exists, the knife with the diameter of 10mm is used as an example, the processing parameter is that the rotation speed (S1) =4500 cutting width (ae) =70% (D) is fed (F) =1000, when the surface roughness effect is reduced, the rotation speed (S2) =s1 (1.3-1.5) of the knife is improved, namely, when the rotation speed is adjusted to 6000-7000 revolutions, the second wire frame area 35b of the knife tip facet 35 continuously replaces the first wire frame area 35a to perform polishing, thus the roughness effect can be maintained, and the polishing service life of the knife is prolonged.

As another embodiment scheme: only the first main tooth and the second main tooth are provided with an intersection angle tool nose and a tool nose facet at the tip end part, and the first auxiliary tooth and the second auxiliary tooth are not provided with the intersection angle tool nose and the tool nose facet at the tip end part; the knife tip facets of the first main tooth and the second main tooth are provided with height differences between the knife tip facets of the first auxiliary tooth and the second auxiliary tooth, wherein the knife tip facets of the first main tooth and the second main tooth are higher than the end faces of the first auxiliary tooth and the second auxiliary tooth by 0.1-0.3mm. It should be noted that, the design is based on the alternative scheme that the high teeth and the low teeth are provided with the angle knife tip and the knife tip facet, and the service life of the cutter is slightly poorer, but the angle knife tip and the knife tip facet are arranged at the tip part of the high teeth (namely the first main teeth and the second main teeth), so that the rough gnawing and the finish can still be realized.

The present utility model is not limited to the above embodiments, and other fall type high-precision milling comprehensive milling cutters which are obtained by adopting the same or similar technical characteristics as the above embodiments of the present utility model are all within the protection scope of the present utility model.

Claims (10)

1. The utility model provides a high finish milling comprehensive milling cutter of drop, includes cutter body, week sword and sword tooth, the week sword sets up the anterior segment at the cutter body, the sword tooth sets up at the front end of week sword, its characterized in that: the edge of the cutter tooth tip is provided with a first protection angle section, a second protection angle section and a third protection angle section, intersection points of the first protection angle section, the second protection angle section and the third protection angle section form an intersection angle cutter point, the front end face of the cutter tooth tip is provided with a cutter point facet, and a trimming height fall is arranged between the cutter point facet and the intersection angle cutter point, so that the cutter point facet carries out fine grinding and trimming processing.

2. The drop height high precision milling integrated cutter according to claim 1, wherein: the first side line and the second side line of the knife tip facet correspond to the first protection angle section and the second protection angle section respectively, and the lengths of the first side line and the second side line of the knife tip facet are 5% -7% of the diameter of the knife body respectively; the height drop between the small plane of the tool nose and the tool nose of the angle of intersection is 0.002-0.01mm.

3. The drop height high precision milling integrated cutter according to claim 1, wherein: the knife tip small plane is a triangular knife tip small plane, wherein the lengths of a first side line and a second side line of the knife tip small plane are equal.

4. The drop height high precision milling integrated cutter according to claim 3, wherein: the vertex of the triangular knife point facet and the intersection angle knife point are respectively positioned at two end points of a new edge formed by intersecting the first protection angle tangential plane and the second protection angle tangential plane.

5. The drop height high precision milling integrated cutter according to claim 1, wherein: the peripheral edge comprises four spirally distributed cutter teeth, and the cutter teeth comprise a main tooth group and an auxiliary tooth group which are distributed in a crossed manner; the main tooth group comprises a first main tooth and a second main tooth, and the auxiliary tooth group comprises a first auxiliary tooth and a second auxiliary tooth; the first main teeth and the second main teeth are high-edge, and the first auxiliary teeth and the second auxiliary teeth are low-edge.

6. The drop height high precision milling integrated cutter as claimed in claim 5, wherein: the knife edge facets of the first main tooth and the second main tooth are different from the knife edge facets of the first auxiliary tooth and the second auxiliary tooth in height, wherein the knife edge facets of the first main tooth and the second main tooth are 0.1-0.3mm higher than the knife edge facets of the first auxiliary tooth and the second auxiliary tooth.

7. The drop height high precision milling integrated cutter as claimed in claim 5, wherein: the peripheral edge is of an unequal spiral and variable pitch structure, so that the angle between the intersection angle of the first main tooth and the intersection angle of the first auxiliary tooth is 95 degrees, the angle between the intersection angle of the first auxiliary tooth and the intersection angle of the second main tooth is 85 degrees, the angle between the intersection angle of the second main tooth and the intersection angle of the second auxiliary tooth is 95 degrees, and the angle between the intersection angle of the second auxiliary tooth and the intersection angle of the first main tooth is 85 degrees.

8. The drop height high precision milling integrated cutter as claimed in claim 5, wherein: the core diameter of the cutter body at the peripheral edge section is in taper arrangement with small front end and large tail end.

9. The drop height high precision milling integrated cutter as claimed in claim 5, wherein: the peripheral edge is an arc relief angle.

10. The drop height high precision milling integrated cutter as claimed in claim 5, wherein: only the first main tooth and the second main tooth are provided with an intersection angle tool nose and a tool nose facet at the tip end part, and the first auxiliary tooth and the second auxiliary tooth are not provided with the intersection angle tool nose and the tool nose facet at the tip end part; the knife tip facets of the first main tooth and the second main tooth are provided with height differences between the knife tip facets of the first auxiliary tooth and the second auxiliary tooth, wherein the knife tip facets of the first main tooth and the second main tooth are higher than the end faces of the first auxiliary tooth and the second auxiliary tooth by 0.1-0.3mm.