TWM560955U - Improved structure of indexable cutting tool - Google Patents

Abstract

An improved structure of an indexable cutting tool comprising a shank, a blade and a bolt, wherein when the bolt is coupled to the arbor, two adjacent abutting faces of the blade are affixed thereto The two groove walls of the shank of the shank are disposed, and the two cutting edges corresponding to the two abutting faces are located in the two lateral grooves between the two groove wall surfaces and the bottom surface of the groove without contacting the arbor. The edge end of the junction between the two blade portions is located at the intersection of the vertical groove between the two groove wall faces and the two lateral grooves without contacting the arbor; the above structure makes it greatly extendable Longevity and combined stability.

Description

Indexable cutting tool improved structure

This creation is a technical field of the structure of indexable cutting tools, especially an improved structure of indexable cutting tools that can greatly extend the service life and the combination stability.

A cutter cutter structure of a conventional replaceable insert, as shown in Taiwan Patent No. M486504 (the symbols of the prior art are as follows for convenience of description, and the original designation of the previous case is indicated, please refer to the previous case, so in the case The symbolic description is not separately indicated, and the detachable blade A is assembled in the blade inserting groove 11 of the milling cutter shaft 10, and the two blade portions around the blade surface 20 are The two groove wall faces of the blade inserting groove 11 are in contact with each other, so that when the milling cutter is in the milling operation, the two blade portions of the blade face 20 will rub against the two groove wall faces of the blade face-engaging groove 11. This in turn causes mutual wear and tear, which greatly shortens the service life. In particular, when the detachable blade A is coupled to the blade inserting groove 11 of the milling cutter shaft 10, the set of facing faces 30 of a smaller area are abutted against the blade inserting groove 11, The two blade portions of the blade surface 20 and the two groove wall surfaces of the blade surface-engaging groove 11 are in linear contact, so that the overall bonding strength is not good, and the joint stability is also poor, and the milling process is performed. It is easy to occur that the detachable blade A is offset and shaken on the milling cutter shaft 10, This in turn affects the accuracy of the machining, which is especially true for large milling operations.

The main purpose of this creation is to solve the problems of short service life and poor combination stability of the conventional cutter cutter structure.

The improved structure of the indexable cutting tool described in the present invention comprises a cutter bar, a blade and a bolt. One end of the arbor has an accommodating groove in the shape of an opening, and the accommodating groove has a groove bottom surface and two groove wall surfaces which intersect to form an angle and gradually incline from the top to the bottom, and the two groove wall faces are overlapped There is a vertical groove, and the intersection of the bottom surface of the groove and the wall surface of the two grooves respectively has two lateral grooves, and the vertical groove is connected to one end of the two lateral grooves, and the bottom surface of the groove has a screw hole penetrating through. The blade is adapted to be embedded in the receiving groove, the bottom surface has a bearing surface of a polygonal shape, and each side of the circumferential facing bearing surface has a plurality of abutting faces which are gradually inclined inward toward the top surface, and the top The surface has a coupling hole penetrating to the bottom surface, the bearing surface is adapted to abut against the bottom surface of the groove, and a plurality of blade portions are formed at the intersection of the plurality of abutment surfaces and the bearing surface, and the plurality of blade portions are formed to meet a plurality of sharp edge ends, wherein the adjacent two abutting faces abut against the two groove walls, so that the two blade portions corresponding to the two abutting faces are located in the two lateral grooves without contacting the arbor; The sharp edge end of the junction of the two cutting edges is located at the intersection of the vertical groove and the two lateral grooves without contacting the arbor, and the opposite edges of the two opposite cutting edges and their adjacent sharp edge ends are convex The end of the arbor is taken out. The bolt is threaded into the screw hole of the arbor through the coupling hole of the blade.

The improved structure of the indexable cutting tool provided by this creation can be borrowed. Forming an angle by the intersection of the two groove walls, the bearing surface of the blade is polygonal, and any two adjacent abutting faces of the plurality of abutting faces can abut against the structural design of the two groove walls, so that By changing the assembly direction of the blade, the plurality of blade portions and the plurality of sharp edge portions can be effectively utilized, thereby extending the service life. In particular, the blade abuts against the bottom surface of the groove by a large area of the bearing surface, and the large area of the two abutting surfaces abut against the wall surfaces of the two grooves, thereby increasing the bonding stability of the blade. And the firmness can avoid the situation of offset, sway, etc. during processing, so as to greatly improve the cutting quality. In particular, when the blade is coupled into the receiving groove, the abutting surfaces abut against the two groove walls, and the two cutting edges corresponding to the two abutting faces are located in the two lateral grooves. No contact with the arbor, the sharp edge end of the junction of the two cutting edges is located at the intersection of the vertical groove and the two lateral grooves without contacting the arbor, so the blade of the blade is processed during processing The part does not rub against the arbor and wears out, so the service life can be further greatly extended.

10‧‧‧Cutter

11‧‧‧ accommodating slots

12‧‧‧Slot bottom

13‧‧‧ slot wall

14‧‧‧Ditch

15‧‧‧ Henggou

16‧‧‧ Groove

17‧‧‧ screw holes

20‧‧‧blade

21‧‧‧ bearing surface

22‧‧‧Abutment

23‧‧‧Combination hole

24‧‧‧ chip drain

25‧‧‧Knife

26‧‧‧ sharp edge

27‧‧‧ Groove

30‧‧‧ bolt

The first figure is a three-dimensional exploded view of the creation.

Figure 2 is a perspective exploded view of another perspective of the present creation.

Figure 3 is a three-dimensional combination diagram of the creation.

Figure 4 is a side view of the original creation.

Figure 5 is a top view of the creation.

Fig. 6 is an enlarged schematic view showing the A-A section of Fig. 5.

Fig. 7 is an enlarged schematic view showing a section B-B of Fig. 5.

Fig. 8 is an enlarged schematic view showing a C-C section of Fig. 5.

Referring to Figures 1-8, the improved structure of the indexable cutting tool of the present invention includes a tool holder 10, a blade 20 and a bolt 30. The shank 10 has an accommodating groove 11 extending to the end and having an opening shape. The accommodating groove 11 is formed with a groove bottom surface 12 which is gradually inclined downward from the end portion and has an intersection to form an angle. And the two groove wall faces 13 which are gradually inclined downward from the top to the bottom, the groove bottom surface 12 is inclined downward by about 5 degrees, and the intersection of the two groove wall faces 13 has a circular one vertical groove 14, the groove bottom surface 12 and The intersection of the two groove walls 13 has two circular grooves 15 respectively. The vertical groove 14 is connected to one end of the two lateral grooves 15 and has an end portion on the end side of the shank 10. Extending to one of the lateral grooves 15 at one of the grooves 16, the bottom surface 12 of the groove has a threaded hole 17 therethrough.

The blade 20 is embedded in the accommodating groove 11 and has a bottom surface having a polygonal bearing surface 21, and each side of the circumferential facing bearing surface 21 has a gradual inward orientation toward the top surface. The plurality of abutting faces 22 have a top surface having a coupling hole 23 penetrating to the bottom surface. The bearing surface 21 is adapted to abut against the bottom surface 12 of the groove, and at the periphery of the bearing surface 21, a plurality of chip evacuation grooves 24 are connected along the respective sides. A plurality of blade portions 25 are formed at the intersection of the plurality of abutment faces 22 and the bearing faces 21, and the plurality of blade portions 25 are joined to form a plurality of sharpened blade ends 26. The top end of the coupling hole 23 has a larger one of the grooves 27. When the blade 20 is assembled in the accommodating groove 11, the two adjacent abutting faces 22 abut against the two groove wall faces 13 so as to correspond to the two abutting faces 22 The blade portion 25 is located in the two lateral grooves 15 and is not in contact with the arbor 10, and the edge end 26 of the intersection of the two blade portions 25 is located at the intersection of the vertical groove 14 and the two lateral grooves 15. While not in contact with the arbor 10, the two opposite edge portions 25 and their associated sharp edge ends 26 project from the ends of the shank 10.

The bolt 30 is threaded into the screw hole 17 of the shank 10 through the coupling hole 23 of the blade 20, and the head of the bolt 30 is embedded in the groove 27.

In this embodiment, the angle between the two groove walls 13 is ninety degrees, and the bearing surface 21 of the blade 20 is square. The opposite blade 20 forms a four abutting surface 22 and four chip grooves. 24. Four blade portions 25 and four sharp edge ends 26. Of course, the angle between the two groove walls 13 of the present creation may also be seventy-two degrees, sixty degrees, etc., and the bearing surface 21 of the opposite blade is a pentagon, a hexagon, etc., which is no longer Let me repeat them one by one.

Because this creation has the special structural design described above, it has the following advantages:

1. The two groove walls 13 intersect to form an angle, the bearing surface 21 of the blade 20 is polygonal, and the two adjacent abutting faces 22 of the plurality of abutting faces 22 can abut against the two groove walls. 13. Therefore, by changing the assembly direction of the blade 20, the plurality of blade portions 25 and the plurality of sharp edge portions 26 can be utilized, thereby increasing the number of effective uses and increasing the service life of the blade.

2, the blade 20 is abutted against the bottom surface 12 of the groove by the bearing surface 21 of the larger area, so that the blade 20 has a better bonding stability, in particular, the two abutting surfaces 22 are pressed against the two groove walls. On the 13th, the combination of the blade 20 can be further increased. Stability and robustness, avoiding the occurrence of offset, sway, etc. during processing, to greatly improve the cutting quality and further increase the service life (please refer to Figures 6-8).

3. When the blade 20 is coupled into the accommodating groove 11, the two abutting faces 22 abut against the two groove wall faces 13, and the two blade portions 25 corresponding to the two abutting faces 22 are located at the two The transverse groove 15 is not in contact with the arbor 10, and the edge end 26 of the intersection of the two blade portions 25 is located at the intersection of the vertical groove 14 and the two lateral grooves 15 without the arbor 10 contact, so the blade portion 25 of the blade 20 does not wear and rub against the tool bar 10 during machining, so that the service life can be greatly extended (please refer to the figures 6 to 8) .

4. When the blade 20 is subjected to cutting processing, the iron filings can be smoothly discharged along the chip flute 24 of the blade 20 and the groove 16 of the arbor 10, so that the chip removing effect is good, and thus the relative shaving Improve the service life of the blade 20 and improve the quality of the processing (please refer to Figure 8).

Claims (8)

An improved structure of an indexable cutting tool comprises: a cutter bar having one opening groove in one end, the receiving groove having a groove bottom surface and two points intersecting to form an angle and gradually inclined upward from the top to the bottom a groove wall surface, the intersection of the two groove wall surfaces has a vertical groove, and the intersection of the bottom surface of the groove and the wall surface of the two grooves respectively has two lateral grooves, the vertical groove is connected with one end of the two lateral grooves, and the bottom surface of the groove has a threaded hole; a blade is embedded in the receiving groove, the bottom surface has a bearing surface of a polygonal shape, and each side of the circumferential surface facing the bearing surface has a gradually inward direction toward the top surface The plurality of inclined abutting surfaces, the top surface has a coupling hole penetrating to the bottom surface, the bearing surface is adapted to abut against the bottom surface of the groove, and a plurality of cutting edges are formed at the intersection of the plurality of abutting surfaces and the bearing surface, Forming a plurality of sharp edge ends at the intersection of the plurality of blade portions, wherein the adjacent two abutting faces abut against the two groove wall surfaces, so that the two blade portions corresponding to the two abutting faces are located in the two lateral grooves Will be in contact with the arbor, the sharp edge end of the junction of the two cutting edges At the intersection of the vertical groove and the two lateral grooves, and not in contact with the arbor, the opposite sides of the two cutting edges and the end of the pointed edge projecting from the end of the shank; and a bolt, It is threaded into the screw hole of the arbor through the coupling hole of the blade. The improved structure of the indexable cutting tool according to claim 1, wherein the angle between the two groove walls is ninety degrees, the bearing surface of the blade is square, and the opposite blade has four abutting faces, four Chip flute, four-blade and four-tip end. The improved structure of the indexable cutting tool according to claim 2, wherein the bottom surface of the groove is a slope which is gradually inclined downward from the end portion. The improved structure of the indexable cutting tool according to claim 3, wherein the bottom surface of the groove is a slope inclined downward by 5 degrees. The improved structure of the indexable cutting tool according to claim 2, wherein the vertical groove and the two lateral grooves are circular. The improved structure of the indexable cutting tool according to claim 2, wherein the bearing surface is provided with four connected chip grooves along the four sides along the periphery. The indexable cutting tool improved structure of claim 6, wherein the end portion of the shank has a groove extending from the end portion to the lateral groove at one side. The indexable cutting tool improved structure of claim 2, wherein the top end of the coupling hole has a larger one of the grooves for receiving the head of the bolt.