A superhard blade with superhard strip inserts

Abstract

The present invention discloses a superhard blade with a superhard strip insert, comprising a tool body, wherein the peripheral contour of the tool body is in a polygonal shape; in the tool body, at least one corner position corresponding to the polygonal shape is set as a tool tip; the tool tip includes a substrate made of cemented carbide material and a superhard strip insert made of superhard material; the corresponding corner positions of the substrate are provided with notches for accommodating the superhard strip insert, and the superhard strip insert is fixed in the notch at the corresponding corner position of the substrate by welding; the outer edge of the upper end of the superhard strip insert is set as a cutting edge. The present invention can reduce the amount of superhard material used to reduce costs, and can design chip breakers with different functions according to different processing conditions in the area vacated by the superhard material, thereby improving the life and production efficiency of the blade.

Description

Technical Field

[0001] The invention relates to the technical field of cutting tools, in particular to a superhard blade with a superhard strip insert. Background Art

[0002] Most of the superhard inserts in the prior art are welded superhard inserts, which are commonly monolithic, columnar, and sheet-shaped. The sizes of the superhard inserts used are different, but under normal working conditions, only a small part of the superhard inserts is effective. The prices of superhard inserts imported from abroad are usually expensive, which results in the disadvantage of high prices of the superhard inserts in the prior art. On the other hand, for plastic materials, the requirements for chip handling are relatively high. Currently, most superhard inserts are flat blades without chip breaker grooves or with simple chip breaker grooves, which have poor chip breaking effects. The chip breaker groove structure of superhard inserts with chip breaker grooves is difficult to produce and is not widely used. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a superhard blade with a superhard strip insert. Through structural improvement, on the one hand, the amount of superhard material used can be reduced to reduce costs. On the other hand, chip breakers with different functions can be designed in the area vacated by the superhard material according to different processing conditions, thereby improving the life and production efficiency of the blade.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a superhard blade with a superhard strip insert, comprising a tool body, the tool body comprising an upper surface, a lower surface and a side surface connected between the upper surface and the lower surface; a screw fixing hole penetrating the upper surface and the lower surface is provided at a substantially middle position of the tool body; the peripheral contour of the tool body is in a polygonal shape; in the tool body, at least one corner position corresponding to the polygonal shape is set as a tool tip; the tool tip includes a base made of cemented carbide material and a superhard strip insert made of superhard material; a notch groove that can accommodate the superhard strip insert is provided at the corresponding corner position of the base, and the superhard strip insert is fixed in the notch groove at the corresponding corner position of the base by welding; the outer edge of the upper end of the superhard strip insert is set as a cutting edge.

[0005] The superhard strip insert is also fixed in the notch groove at the corresponding corner position of the substrate through a strip-shaped cemented carbide substrate, and the shape of the strip-shaped cemented carbide substrate is the same as that of the superhard strip insert.

[0006] The superhard strip insert is V-shaped, and the cutting edge of the superhard strip insert includes a tip cutting edge and side cutting edges extending from the tip cutting edge to both sides, and the side cutting edges on both sides have the same length.

[0007] The superhard strip insert is in a J-shape, and the cutting edge of the superhard strip insert comprises a tip cutting edge and side cutting edges extending from the tip cutting edge to both sides, and the lengths of the side cutting edges on both sides are different.

[0008] The shape of the superhard strip insert is I-shaped, and the cutting edge of the superhard strip insert includes a partial tip cutting edge and a side cutting edge extending from the tip cutting edge to one side.

[0009] The tool tip portion further comprises a chip breaker groove formed on the substrate and corresponding to the position of the superhard strip insert.

[0010] In the chip breaker groove, a plurality of circular convex parts are arranged along the direction of the side cutting edge, and the distances between two adjacent circular convex parts are not equal.

[0011] In the chip breaker groove, the plurality of circular protrusions gradually increase in size from a position close to the corner to a position away from the corner.

[0012] The knife tip is arranged on the upper surface and / or the lower surface of the knife body; the upper surface and / or the lower surface are provided with corresponding marking convex points or marking concave points.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The present invention adopts a design that the tip of the tool includes a base body made of cemented carbide material and a superhard strip insert made of superhard material; the corresponding corner positions of the base body are provided with notches that can accommodate the superhard strip inserts, and the superhard strip inserts are fixed in the notches at the corresponding corner positions of the base body by welding; the outer edge of the upper end of the superhard strip insert is set as a cutting edge. This structure of the present invention can greatly save the raw materials of the superhard inserts, saving the raw material cost for product manufacturing.

[0015] 2. The present invention adopts a chip breaker groove formed on the base and corresponding to the position of the superhard strip insert in the blade tip. This structure of the present invention can design chip breaker grooves with different functions according to different processing conditions in the area vacated by the superhard material (the chip breaker groove is on the base of the cemented carbide material, which is convenient for processing and forming), thereby improving the life of the blade and production efficiency.

[0016] 3. The present invention adopts a method of providing a plurality of circular convex parts in the chip breaker groove along the direction of the side cutting edge, and the plurality of circular convex parts gradually increase in size from the position close to the corner to the position away from the corner. In this structure of the present invention, the circular convex parts can effectively increase the squeezing effect on the chips, improve the chip breaking performance, and increase the effective heat dissipation area of ​​the chip breaker groove, which not only reduces the knife-chip contact area and protects the bottom of the chip breaker groove, but also reduces the cutting temperature of the blade tip and cutting edge. Circular convex parts with different spacings can adapt to processing with different cutting depths; different types of chip breaker grooves can be designed according to different processing conditions to adapt to different cutting environments.

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments; however, the superhard blade with superhard strip inserts of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of the three-dimensional structure of the third embodiment of the present invention;

[0021] Figure 4 is a schematic diagram of the three-dimensional structure of the fourth embodiment of the present invention;

[0022] Figure 5 is a front view of a fourth embodiment of the present invention;

[0023] Figure 6 It is a partial structural schematic diagram of the fourth embodiment of the present invention;

[0024] Figure 7 It is a partial structural schematic diagram of the fifth embodiment of the present invention;

[0025] Figure 8 It is a schematic diagram of the partial structure of the sixth embodiment of the present invention.

[0026] In the figure, 1, cemented carbide substrate; 2, front cutting edge; 3, chip breaker groove; 31, circular convex portion; 31a, circular convex portion a; 31b, circular convex portion b; 31c, circular convex portion c; 32, anti-chip boss; 4, superhard strip insert; 5, strip cemented carbide substrate; 6, cutting edge; 7, lower surface; 8, back cutting edge; 9, marking convex point or marking concave point; 10, upper surface; 11, screw fixing hole; α, tool tip angle. DETAILED DESCRIPTION

[0027] Embodiment 1

[0028] See also Figure 1 As shown, a superhard blade with a superhard strip insert of the present invention comprises a tool body, wherein the tool body comprises an upper surface 10, a lower surface 7 and a side surface 8 (i.e., a back cutting surface) connected between the upper and lower surfaces; a screw fixing hole 11 penetrating the upper and lower surfaces is provided at a substantially middle position of the tool body; the peripheral contour of the tool body is in a quadrilateral shape; in the tool body, two corner positions corresponding to the quadrilateral shape are set as a tool tip; the tool tip comprises a substrate 1 made of cemented carbide material and a superhard strip insert 4 made of superhard material; the superhard strip insert 4 is made of CBN (cubic boron nitride) or PCD (polycrystalline diamond).

[0029] The corresponding corner positions of the substrate 1 are provided with notch grooves for accommodating the super-hard strip inserts, and the super-hard strip inserts 4 are fixed in the notch grooves at the corresponding corner positions of the substrate 1 by welding; the outer edge of the upper end of the super-hard strip insert 4 is set as a cutting edge, and the intersection of the upper surface 10 of the substrate 1 and the side surface is also a cutting edge 6.

[0030] In this embodiment, the superhard strip insert 4 is also fixed in the notch groove at the corresponding corner position of the substrate 1 through a strip cemented carbide substrate 5, and the shape of the strip cemented carbide substrate 5 is the same as that of the superhard strip insert 4. The superhard strip insert 4 and the strip cemented carbide substrate 5 are combined in a high temperature and high pressure environment and then welded together on the upper surface of the blade.

[0031] In this embodiment, the superhard strip insert 4 is V-shaped, and the cutting edge of the superhard strip insert 4 includes a tip cutting edge and side cutting edges extending from the tip cutting edge to both sides, and the side cutting edges on both sides have the same length.

[0032] In this embodiment, the tool tip portion further includes a chip breaker groove 3 formed on the base 1 and corresponding to the position of the superhard strip insert. The chip breaker groove 3 is arranged at the front cutting surface 2 of the upper surface 10 .

[0033] In the present embodiment, in the chip breaker groove 3, a plurality of circular protrusions 31 are provided along the direction of the side cutting edge, and the distance between each adjacent two circular protrusions is not equal; in the present embodiment, three circular protrusions 31 are provided along the direction of each side cutting edge, namely, circular protrusion 31a, circular protrusion 31b and circular protrusion 31c, and the distance between circular protrusion 31a and circular protrusion 31b is not equal to the distance between circular protrusion 31b and circular protrusion 31c.

[0034] In this embodiment, in the chip breaker groove 3, the three circular protrusions gradually increase in size from close to the corner position to away from the corner position; that is, the circular protrusion 31a is the largest, the circular protrusion 31b is the second, and the circular protrusion 31c is the smallest.

[0035] In this embodiment, the blade tip is arranged on the upper surface of the tool body and is a single-sided superhard blade; corresponding marking convex points or marking concave points 9 are also arranged on the upper surface.

[0036] The superhard blade with superhard strip insert of the present invention adopts a blade tip designed to include a base body 1 made of cemented carbide material and a superhard strip insert 4 made of superhard material; the corresponding corner positions of the base body 1 are provided with notches for accommodating the superhard strip insert, and the superhard strip insert 4 is fixed in the notches at the corresponding corner positions of the base body 1 by welding; the outer edge of the upper end of the superhard strip insert 4 is set as a cutting edge. This structure of the present invention can greatly save the raw materials of the superhard insert, saving the raw material cost for product manufacturing.

[0037] The superhard blade with superhard strip insert of the present invention has a chip breaker groove 3 formed on the base 1 and corresponding to the position of the superhard strip insert designed in the blade tip. This structure of the present invention can design chip breaker grooves with different functions according to different processing conditions in the area vacated by the superhard material (the chip breaker groove is on the base of the cemented carbide material, which is convenient for processing and forming), thereby improving the life and production efficiency of the blade.

[0038] The present invention discloses a superhard blade with a superhard strip insert, wherein a plurality of circular protrusions 31 are provided in the chip breaker groove 3 along the direction of the edge cutting edge, and the plurality of circular protrusions 31 gradually increase in size from the position close to the corner to the position away from the corner. In this structure of the present invention, the circular protrusions 31 can effectively increase the extrusion effect on the chips, improve the chip breaking performance, and increase the effective heat dissipation area of ​​the chip breaker groove, which not only reduces the tool-chip contact area, protects the bottom of the chip breaker groove, but also reduces the cutting temperature of the blade tip and the cutting edge. The circular protrusions 31 with different spacings can adapt to the processing of different cutting depths; different types of chip breakers can be designed according to different processing conditions to adapt to different cutting environments. The present invention is to design a superhard strip insert 4 made of superhard material, so that there is enough space on the front blade face 2 to manufacture a complex chip breaker groove structure, so that it can customize the chip breaker groove 3 of any shape on the cemented carbide substrate 1, meet the chip breaking requirements of various materials and processing conditions, have a wide range of applications, and have low manufacturing difficulty. The utility model provides unequally spaced circular protrusions 31 at the chip breaker groove 3 of the cemented carbide substrate, which can meet the chip breaking and heat dissipation requirements of different cutting depth conditions, and the circular protrusion 31 is connected to the anti-chip boss 32. Even if the circular protrusion 31 is worn, the anti-chip boss 32 can still promote chip breaking.

[0039] Embodiment 2

[0040] See also Figure 2As shown, a superhard blade with a superhard strip insert of the present invention is different from the first embodiment in that the blade tip is also arranged on the lower surface of the tool body, which is a double-sided superhard blade.

[0041] Embodiment 3

[0042] See also Figure 3 As shown, a superhard blade with a superhard strip insert of the present invention is different from the first embodiment in that the superhard blade is not provided with a chip breaker groove.

[0043] Embodiment 4

[0044] See also Figures 4 to 6 As shown, a superhard blade with a superhard strip insert of the present invention is different from the third embodiment in that the blade tip is also arranged on the lower surface of the tool body, which is a double-sided superhard blade.

[0045] Embodiment 5

[0046] See also Figure 7 As shown, a superhard blade with a superhard strip insert of the present invention is different from Example 4 in that the superhard strip insert 4 is J-shaped, and the cutting edge of the superhard strip insert 4 includes a tip cutting edge and side cutting edges extending from the tip cutting edge to both sides, and the lengths of the side cutting edges on both sides are different.

[0047] Embodiment 6

[0048] See also Figure 8 As shown, a superhard blade with a superhard strip insert of the present invention is different from Example 4 in that the shape of the superhard strip insert 4 is I-type, and the cutting edge of the superhard strip insert 4 includes a partial tip cutting edge and a side cutting edge extending from the tip cutting edge to one side.

[0049] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent equivalent embodiment without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A superhard blade with a superhard strip insert, comprising a tool body, the tool body comprising an upper surface, a lower surface and a side surface connected between the upper surface and the lower surface; a screw fixing hole penetrating the upper surface and the lower surface is provided at a substantially middle position of the tool body; the peripheral contour of the tool body is in a polygonal shape; in the tool body, at least one corner position corresponding to the polygonal shape is set as a tool tip; characterized in that: The blade tip portion comprises a base body made of cemented carbide material and a superhard strip insert made of superhard material; a notch groove capable of accommodating the superhard strip insert is provided at the corresponding corner position of the base body, and the superhard strip insert is fixed in the notch groove at the corresponding corner position of the base body by welding; the outer edge of the upper end of the superhard strip insert is set as a cutting edge; The tool tip portion further includes a chip breaker groove formed on the substrate and corresponding to the position of the superhard strip insert; In the chip breaker groove, a plurality of circular convex parts are provided along the direction of the side cutting edge, and the distance between each two adjacent circular convex parts is not equal; The knife tip is arranged on the upper surface and / or the lower surface of the knife body; the upper surface and / or the lower surface are provided with corresponding marking convex points or marking concave points.

2. The superhard blade with superhard strip insert according to claim 1, characterized in that: The superhard strip insert is also fixed in the notch groove at the corresponding corner position of the substrate through a strip-shaped cemented carbide substrate, and the shape of the strip-shaped cemented carbide substrate is the same as that of the superhard strip insert.

3. The superhard blade with superhard strip insert according to claim 2, characterized in that: The superhard strip insert is V-shaped, and the cutting edge of the superhard strip insert includes a tip cutting edge and side cutting edges extending from the tip cutting edge to both sides, and the side cutting edges on both sides have the same length.

4. The superhard blade with superhard strip insert according to claim 2, characterized in that: The superhard strip insert is in a J-shape, and the cutting edge of the superhard strip insert comprises a tip cutting edge and side cutting edges extending from the tip cutting edge to both sides, and the lengths of the side cutting edges on both sides are different.

5. The superhard blade with superhard strip insert according to claim 2, characterized in that: The shape of the superhard strip insert is I-shaped, and the cutting edge of the superhard strip insert includes a partial tip cutting edge and a side cutting edge extending from the tip cutting edge to one side.

6. The superhard blade with superhard strip insert according to claim 1, characterized in that: In the chip breaker groove, the plurality of circular protrusions gradually increase in size from a position close to the corner to a position away from the corner.

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