Indexable turning tool

Abstract

The utility model discloses an indexable turning tool which comprises a blade body and a tool bar, the blade body is provided with a cutting unit and a central positioning hole, an end face positioning surface, a side positioning surface and an upper surface of the blade body intersect to form an end face edge and a side edge respectively, the side positioning surface is connected with the end face positioning surface through a rear tool surface and an arc surface, and the side edge is connected with the rear tool surface. The rear tool face and the upper surface intersect to form a cutting edge, the arc face and the upper surface intersect to form an arc edge, the cutting edge and the arc edge extend towards the center positioning hole to form a front tool face with a certain inclination angle, the end face edge and the side face edge extend towards the center positioning hole to form a chip blocking face with a certain inclination angle, and the front tool face, the chip blocking face and the upper surface form a chip containing groove. According to the utility model, the sharpness of the cutting edge is enhanced, the strength of the blade is ensured, the turning resistance is reduced, the chip accommodating capacity is improved, the chip removal smoothness is ensured, and the problems of insufficient strength, large machining resistance and short service life of the existing chamfering cutting blade are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of chamfering cutting blades, and more specifically, to an indexable turning tool. Background Art

[0002] Chamfering cutting blades are used for chamfering and forming the edges of workpieces. Whether it is for straight chamfering of the end face or chamfering of the inner circle or outer circle, the blades need to meet the sharpness of cutting and the durability of the blades, and maintain the cutting stability of the chamfering angle, so as to ensure the high-quality processing of the chamfer.

[0003] The existing chamfering processing methods include two types: one is to use a chamfering drill to process the formed hole. However, the matching of the size of the formed hole by this type of drill is limited, and it cannot meet the straight chamfering processing of the end face; the other is to use a cutting blade. The cutting blade is fixedly installed on the tool and the cutting edge protrudes, and it is inserted into the inner hole or moves relatively on the outer circle and end face, so as to effectively cut on the workpiece to complete the chamfer. For example, in a double-headed chamfering tool of CN202010419487.2, it is disclosed that a blade is installed on the tool shank, and a first chamfering cutting edge for chamfering the upper end hole of the part through hole and a second chamfering cutting edge for chamfering the lower end hole of the same part through hole in the reverse direction are arranged on the blade, and the first chamfering cutting edge and the second chamfering cutting edge extend to the outer wall of the first tool shank. However, the strength of this blade structure during cutting is insufficient, the processing resistance is large, and there is a problem of short service life. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an indexable turning blade aiming at the deficiencies of the existing chamfering cutting blades, such as insufficient strength, large processing resistance and short service life.

[0005] The purpose of the utility model is realized by the following technical solutions:

[0006] An indexable turning tool includes a blade body and a tool shank for installing the blade body. The blade body is provided with a cutting unit and a central positioning hole. The blade body includes an upper surface, a bottom surface, an end face positioning surface and a side positioning surface connecting the upper surface and the bottom surface. The end face positioning surface and the side positioning surface intersect with the upper surface to form an end face edge and a side edge respectively. The side positioning surface is connected to the end face positioning surface through a flank face and an arc surface. The flank face intersects with the upper surface to form a cutting edge, and the arc surface intersects with the upper surface to form an arc edge. A rake face extends from the cutting edge and the arc edge towards the central positioning hole, and a chip breaker face with a certain inclination angle extends from the end face edge and the side edge towards the central positioning hole. The rake face, the chip breaker face and the upper surface form a chip pocket.

[0007] Furthermore, the flank face includes a major flank face and a minor flank face. The minor flank face is connected to the arc face through the major flank face. The intersection of the minor flank face and the upper surface forms a minor cutting edge, and the intersection of the major flank face and the upper surface forms a major cutting edge.

[0008] Furthermore, the included angle between the major cutting edge and the minor cutting edge is 76 - 84°. Preferably, the included angle between the major cutting edge and the minor cutting edge is 80°.

[0009] Furthermore, the included angle A between the major cutting edge and the side cutting edge is 6 - 20°. Preferably, the included angle A is 12°.

[0010] Furthermore, the included angle B between the major flank face and the vertical plane is 5 - 14°. Preferably, the included angle B is 8°.

[0011] Furthermore, the inclination angle C of the rake face with respect to the horizontal bottom surface is 10 - 25°. Preferably, the inclination angle C is 16°. The inclination angle of the chip guard face with respect to the horizontal bottom surface is 10 - 25° and is consistent with the inclination angle C.

[0012] Furthermore, the included angle D between the end cutting edge and the side cutting edge is 80 - 86°.

[0013] Furthermore, the inclination angle of the end cutting edge with respect to the horizontal bottom surface is 6 - 14°, preferably 10°, and the side of the end cutting edge connected to the cutting edge is higher than the side connected to the side cutting edge.

[0014] Furthermore, the inclination angle of the side cutting edge with respect to the horizontal bottom surface is 3 - 7°, preferably 5°, and the side of the side cutting edge connected to the arc cutting edge is higher than the side connected to the end cutting edge.

[0015] Furthermore, the arc face is connected through a relief surface and a side positioning surface.

[0016] Compared with the prior art, the beneficial effects are as follows:

[0017] In the present utility model, a chamfering edge is formed by the cutting edge and the arc cutting edge at the apex angle of the blade body. Through the included angle structure of the major cutting edge with the side cutting edge and the minor cutting edge, the sharpness of the cutting edge is enhanced, the strength of the blade is ensured, and the turning resistance is reduced. Through the chip pocket formed by the rake face, the chip guard face and the upper surface, the chip holding capacity is improved, smooth chip evacuation is ensured, the chip does not damage the surface quality of the workpiece, the chip does not splash into the inner hole and does not hit the back angle face. The present utility model effectively improves the service life of the chamfering cutting blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of a indexable turning tool;

[0019] Figure 2Schematic diagram of the blade body structure;

[0020] Figure 3 Schematic diagram of the blade body structure;

[0021] Figure 4 Top view of the blade body structure;

[0022] Figure 5 Schematic diagram of the angle A between the cutting edge and the side edge of the main body of the blade body;

[0023] Figure 6 Schematic diagram of the angle B between the main flank and the vertical plane of the main body of the blade body;

[0024] Figure 7 Schematic diagram of the inclination angle C between the rake face and the horizontal bottom surface of the main body of the blade body;

[0025] Figure 8 Schematic diagram of the angle D between the end face edge and the side edge of the main body of the blade body.

[0026] Among them, 1 is the tool shank, 2 is the blade body, 3 is the upper surface, 4 is the bottom surface, 5 is the side positioning surface, 6 is the end face positioning surface, 7 is the main flank, 8 is the secondary flank, 9 is the arc surface, 10 is the rake face, 11 is the chip baffle surface, 12 is the clearance surface, 13 is the main cutting edge, 14 is the secondary cutting edge, 15 is the arc edge, 16 is the chip groove, and 17 is the center positioning hole. Specific implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] It should be noted that if there are directional indications (such as up, down, left, right, front, back) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly. If there are descriptions such as "first" and "second" involved in the embodiments of the present invention, the descriptions of "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0029] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0031] Embodiment 1

[0032] This embodiment provides an indexable turning tool, which includes a blade body 2 and a tool shank 1 for mounting the blade body 2. The blade body 2 is provided with a cutting unit and a center positioning hole 17. The blade body 2 includes an upper surface 3, a bottom surface 4, an end face positioning surface 6 and a side face positioning surface 5 connecting the upper surface 3 and the bottom surface 4. The end face positioning surface 6 and the side face positioning surface 5 intersect with the upper surface 3 to form an end face edge and a side face edge respectively.

[0033] The cutting unit includes a cutting edge, an arc edge 15, a rake face 10 and a chip pocket 16. The side face positioning surface 5 is connected to the end face positioning surface 6 through a flank face and an arc surface 9 to form a concave "notch". The flank face intersects with the upper surface 3 to form a cutting edge, the arc surface 9 intersects with the upper surface 3 to form an arc edge 15. The cutting edge and the arc edge 15 extend towards the center positioning hole 17 to form a rake face 10 with a certain inclination angle, and the end face edge and the side face edge extend towards the center positioning hole 17 to form a chip baffle surface 11 with a certain inclination angle. The rake face 10, the chip baffle surface 11 and the upper surface 3 form a chip pocket 16.

[0034] Embodiment 2

[0035] This embodiment provides an indexable turning tool, which includes a blade body 2 and a tool shank 1 for mounting the blade body 2. The blade body 2 is provided with a cutting unit and a center positioning hole 17. The blade body 2 includes an upper surface 3, a bottom surface 4, an end face positioning surface 6 and a side face positioning surface 5 connecting the upper surface 3 and the bottom surface 4. The end face positioning surface 6 and the side face positioning surface 5 intersect with the upper surface 3 to form an end face edge and a side face edge respectively. The side face positioning surface 5 is connected to the end face positioning surface 6 through a flank face and an arc surface 9 to form a concave "notch".

[0036] The cutting unit includes a main cutting edge 13, a secondary cutting edge 14, an arc cutting edge 15, a rake face 10 and a chip pocket 16. The flank face includes a main flank face 7 and a secondary flank face 8. The secondary flank face 8 is connected to the arc face 9 through the main flank face 7. The intersection of the secondary flank face 8 and the upper surface 3 forms the secondary cutting edge 14. The intersection of the main flank face 7 and the upper surface 3 forms the main cutting edge 13. The intersection of the arc face 9 and the upper surface 3 forms the arc cutting edge 15. The main cutting edge 13, the secondary cutting edge 14 and the arc cutting edge 15 extend towards the central positioning hole 17 with a rake face 10 at a certain inclination angle. The end cutting edge and the side cutting edge extend towards the central positioning hole 17 with a chip baffle face 11 at a certain inclination angle. The rake face 10, the chip baffle face 11 and the upper surface 3 form the chip pocket 16.

[0037] Example 3

[0038] This embodiment provides an indexable turning tool, which includes a blade body 2 and a tool shank 1 for mounting the blade body 2. The blade body 2 is provided with a cutting unit and a central positioning hole 17. The blade body 2 includes an upper surface 3, a bottom surface 4, an end face positioning surface 6 and a side face positioning surface 5 connecting the upper surface 3 and the bottom surface 4. The intersection of the end face positioning surface 6 and the upper surface 3 forms an end cutting edge, and the intersection of the side face positioning surface 5 and the upper surface 3 forms a side cutting edge. The included angle D between the end cutting edge and the side cutting edge is 80 - 86°. The side face positioning surface 5 is connected to the end face positioning surface 6 through a flank face, an arc face 9 and a relief surface 12, forming a concave "notch".

[0039] The cutting unit includes a main cutting edge 13, a secondary cutting edge 14, an arc cutting edge 15, a rake face 10 and a chip pocket 16. The flank face includes a main flank face 7 and a secondary flank face 8. The secondary flank face 8 is connected to the arc face 9 through the main flank face 7. The intersection of the secondary flank face 8 and the upper surface 3 forms the secondary cutting edge 14. The intersection of the main flank face 7 and the upper surface 3 forms the main cutting edge 13. The intersection of the arc face 9 and the upper surface 3 forms the arc cutting edge 15. The included angle between the main cutting edge 13 and the secondary cutting edge 14 is 76 - 84°. The included angle A between the main cutting edge 13 and the side cutting edge is 6 - 20°. The included angle B between the main flank face 7 and the vertical plane is 5 - 14°.

[0040] The main cutting edge 13, the secondary cutting edge 14 and the arc cutting edge 15 extend towards the central positioning hole 17 with a rake face 10 at a certain inclination angle. The end cutting edge and the side cutting edge extend towards the central positioning hole 17 with a chip baffle face 11 at a certain inclination angle. The rake face 10, the chip baffle face 11 and the upper surface 3 form the chip pocket 16. The inclination angle C between the rake face 10 and the horizontal bottom surface 4 is 10 - 25°. The inclination angle between the chip baffle face 11 and the horizontal bottom surface 4 is 10 - 25°.

[0041] Example 4

[0042] This embodiment provides an indexable turning tool, such as Figures 1 to 8, including a blade body 2 and a tool shank 1 for mounting the blade body 2. The blade body 2 is provided with a cutting unit and a central positioning hole 17. The blade body 2 includes an upper surface 3, a bottom surface 4, an end face positioning surface 6 and a side face positioning surface 5 connecting the upper surface 3 and the bottom surface 4. The end face positioning surface 6 and the side face positioning surface 5 intersect with the upper surface 3 to form an end face edge and a side face edge respectively. The included angle D between the end face edge and the side face edge is 80 - 86°. The end face edge is an inclined edge with a height difference. The inclined angle between the end face edge and the horizontal bottom surface 4 is 6 - 14°, and the side of the end face edge connected to the cutting edge is higher than the side connected to the side face edge. Similarly, the side face edge is an inclined edge with a height difference. The inclined angle between the side face edge and the horizontal bottom surface 4 is 3 - 7°, and the side of the side face edge connected to the circular arc edge 15 is higher than the side connected to the end face edge.

[0043] The cutting unit includes a main cutting edge 13, a secondary cutting edge 14, a circular arc edge 15, a rake face 10 and a chip pocket 16. The side face positioning surface 5 is connected to the end face positioning surface 6 through a flank face, a circular arc face 9 and a relief surface 12, forming a concave "notch". The flank face includes a main flank face 7 and a secondary flank face 8. The secondary flank face 8 is connected to the circular arc face 9 through the main flank face 7. The secondary flank face 8 intersects with the upper surface 3 to form the secondary cutting edge 14. The main flank face 7 intersects with the upper surface 3 to form the main cutting edge 13. The circular arc face 9 intersects with the upper surface 3 to form the circular arc edge 15. The included angle between the main cutting edge 13 and the secondary cutting edge 14 is 76 - 84°. The included angle A between the main cutting edge 13 and the side face edge is 6 - 20°. The included angle B between the main flank face 7 and the vertical plane is 5 - 14°.

[0044] The main cutting edge 13, the secondary cutting edge 14 and the circular arc edge 15 extend towards the central positioning hole 17 with a rake face 10 at a certain inclination angle. The end face edge and the side face edge extend towards the central positioning hole 17 with a chip baffle surface 11 at a certain inclination angle. The rake face 10, the chip baffle surface 11 and the upper surface 3 form a chip pocket 16. The inclination angle C between the rake face 10 and the horizontal bottom surface 4 is 10 - 25°. The inclination angle between the chip baffle surface 11 and the horizontal bottom surface 4 is 10 - 25°.

[0045] Example 5

[0046] This embodiment provides an indexable turning tool, which includes a blade body 2 and a tool shank 1 for mounting the blade body 2. The blade body 2 is provided with a cutting unit and a central positioning hole 17. The blade body 2 includes an upper surface 3, a bottom surface 4, an end face positioning surface 6 and a side face positioning surface 5 connecting the upper surface 3 and the bottom surface 4. The end face positioning surface 6 and the side face positioning surface 5 intersect with the upper surface 3 to form an end face edge and a side face edge respectively. The included angle D between the end face edge and the side face edge is 83°. The end face edge is an inclined edge with a height difference. The inclined angle between the end face edge and the horizontal bottom surface 4 is 10°, and the side of the end face edge connected to the cutting edge is higher than the side connected to the side face edge. Similarly, the side face edge is an inclined edge with a height difference. The inclined angle between the side face edge and the horizontal bottom surface 4 is 5°, and the side of the side face edge connected to the circular arc edge 15 is higher than the side connected to the end face edge.

[0047] The cutting unit includes a main cutting edge 13, a secondary cutting edge 14, a circular arc edge 15, a rake face 10 and a chip pocket 16. The side face positioning surface 5 is connected to the end face positioning surface 6 through a flank face, a circular arc surface 9 and a relief surface 12, forming a concave "notch". The flank face includes a main flank face 7 and a secondary flank face 8. The secondary flank face 8 is connected to the circular arc surface 9 through the main flank face 7. The secondary flank face 8 intersects with the upper surface 3 to form the secondary cutting edge 14. The main flank face 7 intersects with the upper surface 3 to form the main cutting edge 13. The circular arc surface 9 intersects with the upper surface 3 to form the circular arc edge 15. The included angle between the main cutting edge 13 and the secondary cutting edge 14 is 80°. The included angle A between the main cutting edge 13 and the side face edge is 12°. The included angle B between the main flank face 7 and the vertical plane is 8°.

[0048] The main cutting edge 13, the secondary cutting edge 14 and the circular arc edge 15 extend towards the central positioning hole 17 with a rake face 10 at a certain inclined angle. The end face edge and the side face edge extend towards the central positioning hole 17 with a chip guard surface 11 at a certain inclined angle. The rake face 10, the chip guard surface 11 and the upper surface 3 form a chip pocket 16. The inclined angle C between the rake face 10 and the horizontal bottom surface 4 is 16°. The inclined angle between the chip guard surface 11 and the horizontal bottom surface 4 is 16°.

[0049] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An indexable turning tool, characterized in that, It includes a blade body and a tool shank for mounting the blade body. The blade body is provided with a cutting unit and a central positioning hole. The blade body includes an upper surface, a bottom surface, an end face positioning surface and a side positioning surface connecting the upper surface and the bottom surface. The end face positioning surface and the side positioning surface intersect with the upper surface to form an end face edge and a side edge respectively. The side positioning surface is connected to the end face positioning surface through a flank face and an arc surface. The flank face intersects with the upper surface to form a cutting edge, and the arc surface intersects with the upper surface to form an arc edge. The cutting edge and the arc edge extend towards the central positioning hole to form a rake face, and the end face edge and the side edge extend towards the central positioning hole to form a chip guard surface with a certain inclination angle. The rake face, the chip guard surface and the upper surface form a chip pocket.

2. The indexable turning tool according to claim 1, wherein The flank face includes a main flank face and a sub-flank face. The sub-flank face is connected to the arc surface through the main flank face. The sub-flank face intersects with the upper surface to form a sub-cutting edge, and the main flank face intersects with the upper surface to form a main cutting edge.

3. The indexable turning tool according to claim 2, characterized in that, The included angle between the main cutting edge and the sub-cutting edge is 76 - 84°.

4. The indexable turning tool according to claim 2, wherein The included angle A between the main cutting edge and the side edge is 6 - 20°.

5. The indexable turning tool according to claim 2, characterized in that, The included angle B between the main flank face and the vertical plane is 5 - 14°.

6. The indexable turning tool according to claim 1, characterized in that, The inclination angle C of the rake face with respect to the horizontal bottom surface is 10 - 25°, and the inclination angle of the chip guard surface with respect to the horizontal bottom surface is 10 - 25°.

7. The indexable turning tool according to claim 1, wherein The included angle D between the end face edge and the side edge is 80 - 86°.

8. The indexable turning tool according to claim 1, characterized in that, The inclination angle of the end face edge with respect to the horizontal bottom surface is 6 - 14°, and the side of the end face edge connected to the cutting edge is higher than the side connected to the side edge.

9. The indexable turning tool according to claim 1, wherein The inclination angle of the side edge with respect to the horizontal bottom surface is 3 - 7°, and the side of the side edge connected to the arc edge is higher than the side connected to the end face edge.

10. The indexable turning tool according to claim 1, characterized in that, The arc surface is connected to the side positioning surface through a clearance surface.

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