CN118321588A - Turning blade with multiple circular arc tool tips - Google Patents

Abstract

The invention discloses a turning blade with a multi-arc tool nose, which comprises a blade body, wherein the blade body is formed by encircling an upper surface, a lower surface and a side surface connecting the upper surface and the lower surface, the tool nose is formed at least two corners of the side surface, the tool nose comprises a main angle blade and an auxiliary angle blade which are arc-shaped, the main angle blade is formed at the edge corner of the upper surface or the lower surface, the auxiliary angle blade is connected with the edge line of the main angle blade and the upper surface or the lower surface, the arc radius r0 of the main angle blade is smaller than the arc radius r1 of the auxiliary angle blade, and the main angle blade and the auxiliary angle blade are connected through an inwards-concave transition curve. The turning blade with the multi-arc tool nose has the advantages of improving the production efficiency and quality and achieving the effect of smoothly removing chips, along with the machining efficiency, the machining quality and the chip breaking.

Description

Turning blade with multiple circular arc tool tips

Technical Field

The invention relates to the technical field of turning blades, in particular to a turning blade with a multi-arc tool nose.

Background

In turning, the machining classification of turning inserts is generally rough machining and finish machining. The circular arc radius of the tool nose is large and is used as rough machining, and the circular arc radius of the tool nose is small and is used as finish machining. The turning blade with large radius is selected, so that not only the strength of the cutter point is good, but also larger cutting parameters can be optimized to improve the processing efficiency, but the surface quality of a processed workpiece is not ideal. The arc of the tool nose with small radius is selected, and the surface quality of a workpiece can meet the requirement, but the tool nose is weakened due to the reduction of materials, and the tool nose is only suitable for being applied to small cutting depth and small feeding speed, so that the processing efficiency is affected. That is, it is difficult to achieve both of the conventional cutting insert and the cutting parameter without affecting the surface quality of the workpiece while improving the machining efficiency.

ZL patent No. 95193136.9 describes a corner cutting tool of different radius sections, the corner being smoothed by a plurality of radius sections connected by a tangent point. The processing quality of the workpiece surface is improved mainly through the corner shape, and the problems of processing efficiency, quality and chip breaking are not considered.

Disclosure of Invention

The invention aims to solve the technical problems of overcoming the defects of the prior art and providing the turning blade with the multi-arc tool nose, which has the advantages of improving the production efficiency and quality and smoothly removing chips, and has the advantages of processing efficiency, processing quality and chip breaking.

In order to solve the technical problems, the invention adopts the following technical scheme:

The utility model provides a turning blade with many circular arcs knife tip, includes the blade body, the blade body is enclosed by upper surface, lower surface and the side of connecting upper surface and lower surface, two at least corners of side form the knife tip, the knife tip is including all being circular-arc main angle cutting edge and auxiliary angle cutting edge, the main angle cutting edge forms in the edge corner of upper surface or lower surface, the boundary line of main angle cutting edge and upper surface or lower surface is connected to the auxiliary angle cutting edge, the circular arc radius r0 of main angle cutting edge is less than the circular arc radius r1 of auxiliary angle cutting edge, main angle cutting edge and auxiliary angle cutting edge pass through the transition curve connection of inwards sunken.

As a further improvement of the above technical scheme:

The cutting depth of the main angle blade is Ap0, and the cutting depth of the auxiliary angle blade is Ap1, so that the requirements are met: the diameter of the particles is less than or equal to 0.2mm (Ap 0-Ap 1).

The edges of the upper and/or lower surfaces form a straight edge.

The secondary corner edge is tangential to the straight edge.

The corner of the side surface at the knife tip is alpha, and the following conditions are satisfied: alpha is more than or equal to 20 degrees and less than or equal to 160 degrees.

The transition curve is arc-shaped.

The transition curve is tangential to the primary and secondary corner edges.

And a chip breaking unit is arranged at the corresponding position of the upper surface and/or the lower surface and the main angle blade, the chip breaking unit comprises a main chip breaker, a first auxiliary chip breaker and a second auxiliary chip breaker which are respectively positioned at two sides of the main chip breaker, and the main chip breaker is parallel to a bisector A1 of the tool nose.

The included angle between the first central line of the first auxiliary chip breaker and the bisector A1 is omega, and the included angle between the second central line of the second auxiliary chip breaker and the bisector A1 is omega', so that the following conditions are satisfied: omega is more than or equal to 25 degrees and less than or equal to 60 degrees, and omega is more than or equal to 25 degrees and less than or equal to 60 degrees.

The blade body is symmetrical about a central axis.

Compared with the prior art, the invention has the advantages that:

According to the turning blade with the multi-arc tool nose, the auxiliary angle blade is firstly subjected to rough machining, the cutting depth is Ap, then the main angle blade is subjected to finish machining, the small cutting depths (Ap 0-Ap 1) are further carried out on the auxiliary angle blade and the main angle blade, the surfaces of workpieces with different depths are turned in a layered mode, the auxiliary angle blade with the large arc radius is subjected to rough machining, machining efficiency is improved by selecting large cutting parameters, and the surface quality of the machined workpiece is improved by the main angle blade with the small arc radius through finish machining. Through the combination of the large arc cutting edge and the small arc cutting edge, the processing efficiency and the processing quality are improved. And, the main angle cutting edge and the auxiliary angle cutting edge are connected through an inward concave transition curve, so that on one hand, rough and finish metal chips generated in cutting application are prevented from being broken at the connection part of the main angle cutting edge and the auxiliary angle cutting edge, and on the other hand, partial residual tiny chips are prevented from being crowded at the connection part of the main angle cutting edge and the auxiliary angle cutting edge, and therefore the quality of a machined surface is prevented from being influenced. The turning blade with the multi-arc tool nose has the advantages of improving the production efficiency and quality and smoothly removing chips, along with the problems of machining efficiency, machining quality and chip breaking.

The cutting depth of the main angle blade and the auxiliary angle blade of the turning blade with the multi-arc blade tip is less than or equal to 0.2mm (Ap 0-Ap 1), and the turning blade with the multi-arc blade tip can achieve better production efficiency and quality.

The turning insert with the multi-arc tool nose has the advantages that the transition curve is connected with the main angle blade and the auxiliary angle blade, so that the two arc blades are coherent, and coarse and fine machined metal chips generated in cutting application are not broken or partial residual tiny chips are crowded in fine gaps between adjacent angle blades so as to influence chip removal due to the angle blades with different arc radiuses.

The turning blade with the multi-arc tool nose has the advantages that the transition curve is tangent to the main angle blade and the auxiliary angle blade, so that the transition curve is smoothly connected with the main angle blade and the auxiliary angle blade, chip breakage is further avoided, and chip removal is facilitated.

Drawings

Fig. 1 is a schematic perspective view of a turning insert with a multi-arc nose according to the present invention.

Fig. 2 is a schematic top view of a turning insert with a multi-arc nose according to the present invention.

Fig. 3 is a schematic view of the nose portion of the turning insert with a multi-arc nose of the present invention.

Fig. 4 is a cutting state diagram of a turning insert with a multi-arc nose according to the present invention.

Fig. 5 is a diagram showing a comparison of a multi-arc nose of the present invention with a conventional single-arc nose.

The reference numerals in the drawings denote:

1. A blade body; 11. a central bore; 2. an upper surface; 3. a side surface; 4. a lower surface; 5. a knife tip; 50. a main angle blade; 501. a transition curve; 51. a secondary corner blade; 6. a central shaft; 61. a straight blade; 7. a chip breaking unit; 70. a main chipbreaker; 71. a first pair of chipbreaker; 710. a first centerline; 72. a second secondary chipbreaker; 720. a second centerline; 8. a workpiece.

Detailed Description

The invention is described in further detail below with reference to the drawings and specific examples of the specification.

In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Fig. 1 to 5 show an embodiment of a turning insert with multi-arc nose according to the present invention, which comprises an insert body 1, the insert body 1 being defined by an upper surface 2, a lower surface 4 and a side surface 3 connecting the upper surface 2 and the lower surface 4, the insert body 1 being provided with a central hole 11 penetrating the upper surface 2 and the lower surface 4, the side surface 3 being formed with a nose 5 at least two corners thereof, the nose 5 comprising a main corner edge 50 and a sub corner edge 51 each having an arc shape (convex) formed at an edge corner of the upper surface 2 or the lower surface 4, the sub corner edge 51 connecting the main corner edge 50 with an edge of the upper surface 2 or the lower surface 4, the circular radius r0 of the main corner edge 50 being smaller than the circular radius r1 of the sub corner edge 51, the main corner edge 50 and the sub corner edge 51 being connected by an inwardly concave transition curve 501.

As shown in fig. 4, the turning insert with multi-arc tool nose is characterized in that the auxiliary angle blade 51 is firstly subjected to rough machining with a cutting depth of Ap1, then the main angle blade 50 is subjected to finish machining with small cutting depths (Ap 0-Ap 1), the auxiliary angle blade 51 and the main angle blade 50 are used for turning the surfaces of workpieces with different depths in a layering manner, the auxiliary angle blade 51 with large arc radius is subjected to rough machining, a large cutting parameter is selected for improving the machining efficiency, and the main angle blade 50 with small arc radius improves the surface quality of the machined workpiece 8 through finish machining. Through the combination of the large arc cutting edge and the small arc cutting edge, the processing efficiency and the processing quality are improved. Further, the main corner blade 50 and the sub-corner blade 51 are connected by the inwardly concave transition curve 501, which prevents, on the one hand, rough and finished metal chips generated in cutting applications from breaking at the connection of the main corner blade 50 and the sub-corner blade 51, and on the other hand, prevents a part of the residual minute chips from crowding at the connection of the main corner blade 50 and the sub-corner blade 51, thereby affecting the quality of the machined surface. The turning blade with the multi-arc tool nose has the advantages of improving the production efficiency and quality and smoothly removing chips, along with the problems of machining efficiency, machining quality and chip breaking.

Further, in the present embodiment, the cutting depth of the main angle blade 50 is Ap0, and the cutting depth of the sub angle blade 51 is Ap1, satisfying the following conditions: the diameter of the particles is less than or equal to 0.2mm (Ap 0-Ap 1). The cutting depth of the main angle blade 50 and the auxiliary angle blade 51 is less than or equal to 0.2mm (Ap 0-Ap 1), and better production efficiency and quality can be achieved. Preferably, ap0=1.5 mm, ap1=1 mm.

Further, in the present embodiment, the edge line of the upper surface 2 and/or the lower surface 4 forms a straight blade 61.

Further, in the present embodiment, the sub-angle blade 51 is tangent to the straight blade 61. The sub-angle blade 51 and the straight blade 61 are smoothly connected to each other, and the cutting quality is improved.

Further, in this embodiment, as shown in fig. 2, the corner of the side surface 3 at the nose 5 is α, which satisfies the following conditions: alpha is more than or equal to 20 degrees and less than or equal to 160 degrees. The corner of the side surface 3 at the knife tip 5 is the included angle between two straight cutting edges 61 on the same surface (the upper surface 2 or the lower surface 4) connected with the knife tip 5. The overall blade structure in which the straight blade 61 is connected to the sub-angle blade 51, the transition curve 501, and the main angle blade 50 can achieve a preferable cutting effect.

Further, in the present embodiment, as shown in fig. 3, the transition curve 501 has a circular arc shape. The transition curve 501 connects the primary corner edge 50 and the secondary corner edge 51 such that the two circular arc edges are consecutive without breaking off the rough finished metal chips produced in cutting applications due to the corner edges of different circular arc radii or partially leaving tiny chips crowded in the slots between adjacent corner edges to affect chip removal.

Further, in the present embodiment, the transition curve 501 is tangential to the main corner blade 50 and the sub corner blade 51. The transition curve 501 is connected with the main angle blade 50 and the auxiliary angle blade 51 in a smooth way, so that chip breaking is further avoided, and chip removal is facilitated.

In other embodiments, the transition curve 501 may also be composed of a plurality of circular arc segments.

Further, in the turning insert shown in fig. 4, the secondary corner edge 51 of the circular arc radius r1 is cut to a depth ap1, the primary corner edge 50 of the circular arc radius r0 is cut to a depth ap0 into the workpiece 8, and in the turning to the left (in the direction of arrow F in fig. 4), the secondary corner edge 51 and the primary corner edge 50 are layered on the surface of the workpiece 8 at different depths of chips. Under the conditions of large cutting depth and large feeding machining parameters, the auxiliary corner cutting edge 51 is firstly subjected to rough machining with cutting depth of Ap1, and then the main corner cutting edge 50 is subjected to fine machining with small cutting depths (Ap 0-Ap 1). That is, the rough and finish machining by the main corner blade 50 and the sub corner blade 51 are performed in a layered manner, and the intermediate transition curve 501 cuts the rough and finish chips to form the transition chips, so that the rough and finish chips are connected together, which corresponds to rough and finish integrated cutting chip machining. A coarse and fine metal chip is generated by the action of the transition curve 501, and finally the metal chip is split while being broken by the chip breaking unit 7.

Further, in this embodiment, as shown in fig. 3, a chip breaking unit 7 is disposed at a position corresponding to the main corner blade 50 on the upper surface 2 and/or the lower surface 4, and the chip breaking unit 7 includes a main chip breaker 70, and a first auxiliary chip breaker 71 and a second auxiliary chip breaker 72 respectively disposed at two sides of the main chip breaker 70, where the main chip breaker 70 is parallel to a bisector A1 of the blade tip 5. Three chip breakers in different directions are arranged at the corresponding positions of the upper surface 2 and/or the lower surface 4 and the main angle cutting edge 50, namely, the main chip breaker 70, the first auxiliary chip breaker 71 and the second auxiliary chip breaker 72 are oriented differently, so that the metal chips subjected to rough and fine integrated processing can be effectively broken and split, and the quality of the processing surface is improved.

Further, in the present embodiment, the first center line 710 of the first auxiliary chipbreaker 71 forms an angle ω with the bisector A1, and the second center line 720 of the second auxiliary chipbreaker 72 forms an angle ω' with the bisector A1, so as to satisfy the following conditions: omega is more than or equal to 25 degrees and less than or equal to 60 degrees, and omega is more than or equal to 25 degrees and less than or equal to 60 degrees. ω and ω', satisfy: omega is more than or equal to 25 degrees and less than or equal to 60 degrees, and omega is more than or equal to 25 degrees and less than or equal to 60 degrees. The chip breaking unit 7 with the structure has a good chip breaking and dividing effect. Preferably, ω=50°, ω' =50°

The included angle between the first auxiliary chip breaker 71 and the main chip breaker 70 can be adjusted according to working conditions, so that the chip breaking and splitting of the metal chips subjected to rough and fine integrated machining can be optimized to the maximum degree, and the quality of the machined surface can be improved to the maximum degree.

Further, in the present embodiment, the blade body 1 is symmetrical about the central axis 6. That is, the cutting edges 5 are symmetrically arranged around the central axis 6.

FIG. 5 shows a comparison of a multi-arc nose of the present invention with a conventional single-arc nose (radius r0' of the single-arc nose)

The regular waveform arc tool nose formed by a plurality of arc tool noses can be controlled by the radius r of each angle tool edge so as to adapt to more cutting working conditions.

Further, in the present embodiment, the turning insert may be designed as a positive angle cutting insert with relief angle or as a negative angle cutting insert without relief angle.

Further, the insert body 1 is provided with a central hole 11 penetrating the upper surface 2 and the lower surface 4, and a center line of the central hole 11 coincides with the center axis 6. The central hole 11 is a straight hole, the invention is not limited to this, and the blade body 1 can be designed into other shapes or a non-hole clamping structure directly clamped by the upper surface 2 and the lower surface 4 according to different actual working conditions.

Further, in the present embodiment, the nose 5 includes one main corner blade 50 and two sub corner blades 51, the two sub corner blades 51 being located on both sides of the main corner blade 50, respectively. In other embodiments, a plurality of auxiliary corner blades 51 may be disposed on each side of the main corner blade 50, and the auxiliary corner blades 51 may be connected between the straight blade 61 and the main corner blade 50 in sequence, or adjacent auxiliary corner blades 51 may be connected by a transition curve 501, where the radius of the auxiliary corner blade 51 gradually decreases from the straight blade 61 to the main corner blade 50. Alternatively, the main angle blade 50 may be provided with the sub angle blade 51 on one side only, and a plurality of sub angle blades 51 may be provided and connected in sequence between the straight blade 61 and the main angle blade 50, and adjacent sub angle blades 51 may be connected by a transition curve 501, wherein the radius of the sub angle blade 51 gradually decreases from the straight blade 61 to the main angle blade 50.

Further, in this embodiment, the side surface 3 has four corners, and two opposite corners form a nose 5.

The main corner blade 50 may be formed only at the edge corner of the upper surface 2 corresponding to the tip 5, and in this case, the main corner blade 50 and the edge line of the upper surface 2 are connected by the transition curve 501 and the sub corner blade 51. Of course, the main angle blade 50 may be formed only at the edge corner of the lower surface 4 corresponding to the cutting edge 5, and in this case, the edge line of the main angle blade 50 and the lower surface 4 may be connected to the sub-angle blade 51 by the transition curve 501. Of course, the main corner blade 50 may be formed at the edge corners of the upper surface 2 and the lower surface 4 corresponding to the cutting edge 5, and in this case, the edge line of the main corner blade 50 and the upper surface 2 may be connected by the transition curve 501 and the sub-corner blade 51, and the edge line of the main corner blade 50 and the lower surface 4 may be connected by the transition curve 501 and the sub-corner blade 51.

While the invention has been described with reference to preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.

Claims (10)

1. The utility model provides a turning blade with many circular arcs knife tip, includes blade body (1), blade body (1) are enclosed by upper surface (2), lower surface (4) and side (3) of connecting upper surface (2) and lower surface (4), two at least corners of side (3) form knife tip (5), its characterized in that: the knife tip (5) comprises a main angle knife edge (50) and an auxiliary angle knife edge (51), wherein the main angle knife edge (50) is formed at the edge corner of the upper surface (2) or the lower surface (4), the auxiliary angle knife edge (51) is connected with the edge line of the main angle knife edge (50) and the upper surface (2) or the lower surface (4), the arc radius r0 of the main angle knife edge (50) is smaller than the arc radius r1 of the auxiliary angle knife edge (51), and the main angle knife edge (50) and the auxiliary angle knife edge (51) are connected through an inwards-sunken transition curve (501).

2. The turning insert with multi-arc nose of claim 1, wherein: the cutting depth of the main angle blade (50) is Ap0, and the cutting depth of the auxiliary angle blade (51) is Ap1, so that the following conditions are satisfied: the diameter of the particles is less than or equal to 0.2mm (Ap 0-Ap 1).

3. The turning insert with multi-arc nose of claim 1, wherein: the edges of the upper surface (2) and/or the lower surface (4) form a straight edge (61).

4. A turning insert with multi-arc nose according to claim 3, characterized in that: the secondary corner blade (51) is tangential to the straight blade (61).

5. The turning insert with multi-arc nose of claim 4, wherein: the corner of the side surface (3) at the cutter point (5) is alpha, and the following conditions are satisfied: alpha is more than or equal to 20 degrees and less than or equal to 160 degrees.

6. The turning insert with multi-arc nose of claim 1, wherein: the transition curve (501) is arc-shaped.

7. The turning insert with multi-arc nose of claim 6, wherein: the transition curve (501) is tangential to the primary (50) and secondary (51) corner blades.

8. The turning insert with multi-arc nose according to any one of claims 1 to 7, wherein: a chip breaking unit (7) is arranged at the corresponding position of the upper surface (2) and/or the lower surface (4) and the main corner cutting edge (50), the chip breaking unit (7) comprises a main chip breaker (70), and a first auxiliary chip breaker (71) and a second auxiliary chip breaker (72) which are respectively arranged at two sides of the main chip breaker (70), and the main chip breaker (70) is parallel to a bisector A1 of the cutter point (5).

9. The turning insert with multi-arc nose of claim 8, wherein: an included angle between a first central line (710) of the first auxiliary chip breaker (71) and a bisector A1 is omega, and an included angle between a second central line (720) of the second auxiliary chip breaker (72) and the bisector A1 is omega', so that the following conditions are satisfied: omega is more than or equal to 25 degrees and less than or equal to 60 degrees, and omega is more than or equal to 25 degrees and less than or equal to 60 degrees.

10. The turning insert with multi-arc nose according to any one of claims 1 to 7, wherein: the blade body (1) is symmetrical about a central axis (6).