Turning blade for finish machining

Abstract

The utility model belongs to the technical field of turning tools, and discloses a turning blade for finish machining, which comprises a blade body, the blade body comprises an upper surface, a lower surface and a plurality of side surfaces connected with the upper surface and the lower surface, every two adjacent side surfaces are connected through an arc surface, a vertex angle is formed by the two adjacent side surfaces and the arc surface, and a cutting edge is arranged at the vertex angle. The cutting edge comprises an arc cutting edge and side cutting edges located on the two sides of the arc cutting edge, the arc cutting edge and the two side cutting edges are symmetrically distributed along the angular bisection face of the vertex angle, a protruding part is arranged on the upper surface, a positioning face is formed on the top face of the protruding part, a positioning hole is formed in the positioning face, and a chip breaker groove is formed between the protruding part and the cutting edge. An inclined chip rolling face is arranged between the protruding part and the chip breaker groove. According to the turning blade for finish machining, the chip breaking effect is good in the cutting process, chip removal is smooth, less generated chips hit the blade, and therefore the service life of the blade is effectively prolonged, and the finished product yield of machined workpieces is effectively increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to turning tool technical field especially, relates to a finishing turning blade. BACKGROUND

[0002] Turning is a kind of machining method that utilizes tool to remove the excess material from blank (casting, forging or profile etc.), to obtain the part that meets the technical requirements of drawing.

[0003] Turning tool needed in turning includes turning tool, center drill, tap, die, drill bit etc., and turning tool is the most widely used tool in turning metal material application.The cutting process of existing finishing turning tool is unstable, chip breaking is not good and chip removal is not smooth, and the chip is not easy to be effectively discharged, and the surface of the workpiece being processed is easily scratched, and then the wear of workpiece is caused.

[0004] Therefore, a finishing turning blade is needed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a finishing turning blade, which has good chip breaking effect in cutting process, smooth chip removal, and less chip produced on the blade, thereby effectively improving the service life of the blade and the finished product yield of the workpiece.

[0006] To achieve this purpose, the utility model adopts the following technical scheme:

[0007] The finishing turning blade includes blade body, the blade body includes upper surface, lower surface and multiple side surfaces connecting the upper surface and the lower surface, two adjacent side surfaces are connected by circular arc surface and form a top angle, the top angle is provided with cutting edge, the cutting edge includes circular arc cutting edge and side cutting edge on both sides of the circular arc cutting edge, the circular arc cutting edge and two side cutting edges are symmetrically distributed along the angular bisector of the top angle, the upper surface is provided with protruding part, the top surface of the protruding part forms positioning surface, positioning hole is formed in the positioning surface, chip breaking groove is arranged between the protruding part and the cutting edge, and the protruding part and the chip breaking groove have inclined chip winding surface.

[0008] Optionally, the chip breaking groove includes rake face, chip breaking groove bottom circular arc, inclined transition surface and chip breaking platform connected in sequence along the direction from the cutting edge to the center axis of the blade body, and the top surface height of the chip breaking platform is lower than the top surface height of the protruding part.

[0009] Optionally, the chip breaking groove further includes circular arc transition surface, and the inclined transition surface is smoothly connected with the chip breaking platform through the circular arc transition surface.

[0010] Optionally, a circular arc connecting surface is further included, and the chip breaking platform is connected with the convex portion through the circular arc connecting surface.

[0011] Optionally, the inclination angle of the chip rolling surface is 40-70 degrees.

[0012] Optionally, a plurality of convex portions are provided, and each vertex of the blade body corresponds to one of the convex portions.

[0013] Optionally, the positioning hole is arranged on the positioning surface of at least one convex portion.

[0014] Optionally, the blade body is a polyhedral structure, the blade body is provided with a central hole, and the blade body is centrally symmetric about the central axis of the central hole.

[0015] Optionally, the cross section of the blade body is a rhombic quadrilateral.

[0016] Optionally, the blade body is a double-sided blade, and the upper surface and the lower surface have the same structure.

[0017] The utility model discloses the beneficial effect of:

[0018] The utility model provides a finish machining turning blade, and the blade body is composed of an upper surface, a lower surface and a plurality of side surfaces connecting the upper surface and the lower surface. Two adjacent side surfaces are connected through a circular arc surface and form a vertex angle, and a cutting edge is arranged at the vertex angle. The cutting edge includes a circular arc cutting edge and side cutting edges on both sides of the circular arc cutting edge. The cutting function can be realized through the circular arc cutting edge and the side cutting edges on both sides. A convex portion is arranged on the upper surface, and the top surface of the convex portion forms a positioning surface. A positioning hole is arranged on the positioning surface. That is, the positioning surface and the positioning hole can facilitate the clamping and positioning of the blade body, improve the positioning accuracy and positioning strength. A chip breaking groove is arranged between the convex portion and the cutting edge. The convex portion and the chip breaking groove are provided with an inclined chip rolling surface. The height of the chip rolling surface gradually increases in the direction close to the convex portion. The cooperation of the chip breaking groove and the chip rolling surface can improve the chip breaking effect of the finish machining turning blade during the cutting process, and the chip can be smoothly discharged. The cutting chip produced is less and hits the blade, thereby effectively improving the service life of the blade and the yield of finished products of the machined workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the description of the embodiments of the utility model will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the contents of the embodiments of the utility model and the drawings by those skilled in the art without creating any creative labor.

[0020] Figure 1 is a structure schematic view of the turning blade for finish machining provided by the embodiment of the utility model;

[0021] Figure 2 is a side view of the turning blade for finish machining provided by the embodiment of the utility model;

[0022] Figure 3 is a top view of the turning blade for finish machining provided by the embodiment of the utility model;

[0023] Figure 4 is Figure 3 the sectional view in A-A direction;

[0024] Figure 5 is Figure 4 the local enlarged view at B.

[0025] in the figure:

[0026] 10, blade body; 20, center hole;

[0027] 1, upper surface; 11, convex part; 12, positioning surface; 13, positioning hole;

[0028] 2, lower surface;

[0029] 3, side surface;

[0030] 4, arc surface;

[0031] 51, arc cutting edge; 52, side cutting edge;

[0032] 6, chip breaker groove; 61, rake face; 62, chip breaker groove bottom arc; 63, inclined transition surface; 64, arc transition surface; 65, chip breaker land; 66, arc connecting surface;

[0033] 7, chip curling surface. DETAILED DESCRIPTION

[0034] The technical scheme of the utility model will be further described below by combining the drawings and specific embodiments.

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below by combining the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents the selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0037] It should be noted that similar reference numbers and letters refer to similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0038] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, and are merely for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0039] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0041] In the description of the utility model, the term "and / or" is only a kind of description of the association relationship of associated object, it indicates that there can be three kinds of relations, for example, A and / or B, can indicate: exist A alone, exist A and B simultaneously, exist B alone these three cases.In addition, the character " / " in the utility model, generally indicates that the front and rear associated objects are "or" relationship.

[0042] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout.The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as the limitation of the utility model.

[0043] As Figure 1 Shown, the present embodiment provides a finish turning insert, it includes insert body 10, insert body 10 includes upper surface 1, lower surface 2 and the multiple side surface 3 of connecting upper surface 1 and lower surface 2.Insert body 10 is polyhedral structure, insert body 10 is equipped with center hole 20, center hole 20 is used to be installed fixed with tool rod body.Insert body 10 is about the center axis of center symmetry structure of center hole 20.In the present embodiment, the cross section of this insert body 10 is rhombic quadrilateral structure.

[0044] Continue to refer to Figures 1-3 , adjacent two side surfaces 3 of insert body 10 are connected by circular arc surface 4 and form a top angle, and the cutting edge is equipped at the top angle, and the cutting edge includes circular arc cutting edge 51 and side cutting edge 52 located at both sides of circular arc cutting edge 51, and circular arc cutting edge 51 and two side cutting edges 52 are distributed symmetrically along the angle bisector of top angle.In the cutting process, the surface of the workpiece to be processed is contacted and cut by circular arc cutting edge 51 and two side cutting edges 52.

[0045] Meanwhile, the upper surface 1 of the insert body 10 is provided with a protruding portion 11, the top surface of the protruding portion 11 forms a positioning surface 12, and a positioning hole 13 is formed on the positioning surface 12.That is, the clamping and positioning of the insert body 10 can be facilitated by the positioning surface 12 and the positioning hole 13, and the positioning accuracy and positioning strength are further improved.In the present embodiment, the height difference between the positioning surface 12 and the upper surface 1 is 0.1mm.

[0046] Specifically, the protruding portion 11 is provided with a plurality of, and each top angle of the insert body 10 is correspondingly provided with one protruding portion 11.In the present embodiment, the protruding portion 11 is provided with 4, that is, the positioning surface 12 is provided with 4, and the positioning installation of the insert body 10 is realized by the 4 positioning surfaces 12.

[0047] Further, a positioning hole 13 is formed in the positioning surface 12 of the at least one protrusion 11. The positioning hole 13 can be used as a positioning mark when the insert body 10 is installed, so as to further improve the positioning accuracy.

[0048] Optionally, referring to Figure 1 and Figures 3-5 , the protrusion 11 and the cutting edge are provided with a chip breaker groove 6, and the protrusion 11 and the chip breaker groove 6 are provided with an inclined chip curling surface 7. The height of the chip curling surface 7 gradually increases in the direction close to the protrusion 11. Through the cooperation of the chip breaker groove 6 and the chip curling surface 7, the turning insert for finish machining has good chip breaking effect in the cutting process, the chip is smoothly discharged, and the generated chip is less hit on the insert, thereby effectively improving the service life of the insert and the yield of finished products of the machined workpiece.

[0049] In the cutting process, the side cutting edge 52 and the arc cutting edge 51 are in contact and cut the surface of the workpiece to be machined. The chip generated in the machining process flows through the chip breaker groove 6 to be curled and broken, and the chip curling surface 7 is used to guide the chip to be smoothly discharged from the cutting area, so as to avoid the chip from winding on the tool or the workpiece, thereby ensuring the smooth progress of the machining process. The chip curling surface 7 can also reduce the scratch of the chip on the machined workpiece surface, ensure the machining quality of the workpiece, and reduce the splashing of the chip, thereby protecting the safety of the operator.

[0050] Preferably, in the embodiment, the inclination angle of the chip curling surface 7 is 40°-70°, and the radius of the arc of the chip curling surface 7 is about R0.4. By adjusting the shape and angle of the chip curling surface 7, the shape of the chip can be controlled, so that it is easier to break and discharge, and the vibration and machine load caused by long chips can be avoided.

[0051] Specifically, as Figure 5 shown, the chip breaker groove 6 includes a rake surface 61, a chip breaker groove bottom arc 62, an inclined transition surface 63 and a chip breaker land 65 connected in sequence in the direction of the center axis of the insert body 10 along the cutting edge, and the top surface height of the chip breaker land 65 is lower than the top surface height of the protrusion 11. In the cutting process, the chip curls after passing through the rake surface 61, the chip breaker groove bottom arc 62 and the inclined transition surface 63 in sequence, and finally breaks and flows out after colliding with the chip breaker land 65. In the embodiment, the inclination angle of the rake surface 61 is 18°-22°; the radius of the chip breaker groove bottom arc 62 is R0.42; and the inclination angle of the inclined transition surface 63 is 8°-10°. The height difference between the chip breaker land 65 and the lowest point of the chip breaker groove bottom arc 62 is 0.16mm; and the height difference between the chip breaker land 65 and the positioning surface 12 is 0.13mm.

[0052] Further, the chip breaker groove 6 further includes an arc transition surface 64, and the inclined transition surface 63 smoothly transitions to the chip breaker land 65 through the arc transition surface 64, thereby ensuring the smooth movement of the chip.

[0053] More specifically, it further comprises a circular arc connecting surface 66, and the chip breaker 65 is connected with the convex part 11 through the circular arc connecting surface 66. In this way, the circular arc transition is realized between the chip breaker 65 and the convex part 11, the sharp corner structure of the blade body 10 is reduced, and both the machining and manufacturing are facilitated, and the curling and discharging of the chips are more smooth.

[0054] Optionally, in the embodiment, the blade body 10 is a double-sided blade, that is, the upper surface 1 and the lower surface 2 of the blade body 10 are of the same structure.

[0055] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For the ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A turning insert for finish machining, characterized in that The application relates to a cutting blade body (10) comprising an upper surface (1), a lower surface (2) and a plurality of side surfaces (3) connecting the upper surface (1) and the lower surface (2), two adjacent side surfaces (3) being connected by a circular arc surface (4) and forming a top corner, a cutting edge being arranged at the top corner, the cutting edge comprising a circular arc cutting edge (51) and side cutting edges (52) arranged on both sides of the circular arc cutting edge (51), the circular arc cutting edge (51) and the two side cutting edges (52) being symmetrically distributed along an angle bisector of the top corner, a protruding part (11) being arranged on the upper surface (1), a top surface of the protruding part (11) forming a positioning surface (12), a positioning hole (13) being arranged on the positioning surface (12), a chip breaker groove (6) being arranged between the protruding part (11) and the cutting edge, and a chip curling surface (7) being arranged between the protruding part (11) and the chip breaker groove (6) and being inclined, the height of the chip curling surface (7) gradually increasing in a direction close to the protruding part (11).

2. The finishing turning insert according to claim 1, characterized in that The chip breaker groove (6) comprises a rake surface (61), a chip breaker groove bottom circular arc (62), an inclined transition surface (63) and a chip breaker platform (65) connected in sequence along a direction of a central axis of the cutting blade body (10), and the height of a top surface of the chip breaker platform (65) is lower than the height of a top surface of the protruding part (11).

3. The finishing turning insert according to claim 2, characterized in that The chip breaker groove (6) further comprises a circular arc transition surface (64), the inclined transition surface (63) and the chip breaker platform (65) being smoothly connected through the circular arc transition surface (64).

4. The finishing turning insert according to claim 2, characterized in that The chip breaker platform (65) is connected with the protruding part (11) through a circular arc connecting surface (66).

5. The finishing turning insert according to claim 1, characterized in that, The inclination angle of the chip curling surface (7) is 40-70 degrees.

6. The finishing turning insert according to claim 1, characterized in that, A plurality of protruding parts (11) are arranged, and each top corner of the cutting blade body (10) corresponds to one protruding part (11).

7. The finishing turning insert according to claim 6, characterized in that The positioning hole (13) is arranged on the positioning surface (12) of at least one protruding part (11).

8. A finishing turning insert according to any one of claims 1-7, characterized in that The cutting blade body (10) is a polygonal structure, the cutting blade body (10) is provided with a central hole (20), and the cutting blade body (10) is centrally symmetric about a central axis of the central hole (20).

9. The finishing turning insert according to claim 8, characterized in that The cross section of the cutting blade body (10) is a rhombic quadrilateral.

10. The finishing turning insert according to any one of claims 1-7, characterized in that, The cutting blade body (10) is a double-sided cutting blade, and the upper surface (1) and the lower surface (2) have the same structure.

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