Cutter cutting edge structure and cutter

Abstract

The utility model relates to the technical field of cutter design, and discloses a cutter cutting edge structure which comprises a cutting edge body, the front end edge of the cutting edge body is provided with a first chamfer and a second chamfer, the second chamfer is connected between the first chamfer and the upper surface of the cutting edge body, and a first included angle beta 1 is formed between the plane where the first chamfer is located and the upper surface of the cutting edge body. A second included angle beta 2 is formed between the plane where the second chamfered edge is located and the upper surface of the blade body, and beta 2 is smaller than beta 1. After the cuttings make contact with the first chamfered edge, the direction of the cuttings is changed, the contact time of the cuttings and the second chamfered edge is delayed, and abrasion of the cutting edge of the front end blade is delayed. A third chamfer and a fourth chamfer are oppositely arranged on the side end edge of the blade body, a third included angle beta 3 is formed between the plane where the third chamfer is located and the upper surface of the blade body, a fourth included angle beta 4 is formed between the plane where the fourth chamfer is located and the upper surface of the blade body, and beta 3 is larger than beta 2 and equal to beta 4. And the cutting direction is changed, so that the side end edge is prevented from being directly abraded by cutting, and the tipping probability is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to tool design technical field, especially a tool cutting edge structure and tool. BACKGROUND

[0002] In the high speed cutting process, the tool rake face is mainly subjected to the action of chemical thermal wear, leading to that the material surface is extremely susceptible to oxidation wear in the machining process, which is reflected on the tool as tool blade chipping, resulting in its service life reduction and cost increase. The design form of cutting edge has a crucial influence on the service life and cutting performance of the tool. The key competition of tool design exists in the microprocessing of the cutting edge, and this link is also the key for various tools to stand out in the fierce market. Through the microstructure morphology processing of the tool cutting edge position, the tool wear resistance can be improved, thereby improving the tool service life, finally meeting the stability of tool machining process, and further meeting the surface quality requirements of workpieces. SUMMARY

[0003] One purpose of the utility model is to provide a tool cutting edge structure, which can reduce the chipping probability of the tool cutting edge and improve the workpiece machining quality.

[0004] According to the above idea, the technical scheme adopted by the utility model is as follows:

[0005] A tool cutting edge structure is provided, which comprises a tool blade body, a first chamfer and a second chamfer are arranged on the front end edge of the tool blade body, the second chamfer is connected between the first chamfer and the upper surface of the tool blade body, the plane where the first chamfer is located and the upper surface of the tool blade body form a first included angle β1, the plane where the second chamfer is located and the upper surface of the tool blade body form a second included angle β2, and β2 < β1.

[0006] The side end edge of the tool blade body is oppositely provided with a third chamfer and a fourth chamfer, the plane where the third chamfer is located and the upper surface of the tool blade body form a third included angle β3, the plane where the fourth chamfer is located and the upper surface of the tool blade body form a fourth included angle β4, and β2 < β3 = β4.

[0007] Optionally, along the length direction of the tool blade body, the width of the plane where the first chamfer is located is H1, and H1 ≤ 0.1 mm.

[0008] Optionally, along the length direction of the tool blade body, the width of the plane where the second chamfer is located is H2, and 0.15 mm ≤ H2 ≤ 0.5 mm.

[0009] Optionally, the value range of the first included angle β1 is 20° ≤ β1 ≤ 60°.

[0010] Optionally, the second included angle β2 is in the range of 10°≤β2≤40°.

[0011] Optionally, the third included angle β3 and the fourth included angle β4 are in the range of β3=β4<60°.

[0012] Optionally, along the width direction of the blade body, the width of the plane where the third chamfer is located is H3, the width of the plane where the fourth chamfer is located is H4, and H3=H4<H1.

[0013] Another purpose of the utility model is to provide a tool, which can reduce the probability of tool edge collapse and improve workpiece machining quality.

[0014] As conceived above, the technical scheme adopted by the utility model is:

[0015] The utility model provides a tool, which comprises a tool body and the tool edge structure, and the tool edge structure is connected to one end of the tool body.

[0016] Optionally, the tool edge structure and the tool body are integrally formed.

[0017] Optionally, the tool edge structure is welded on the tool body.

[0018] The utility model has the advantages of:

[0019] The utility model discloses a tool edge structure, which comprises a blade body, a first chamfer and a second chamfer are arranged on the front end blade of the blade body, the second chamfer is connected between the first chamfer and the upper surface of the blade body, the plane where the first chamfer is located and the upper surface of the blade body form a first included angle β1, the plane where the second chamfer is located and the upper surface of the blade body form a second included angle β2, and β2<β1. The double chamfers of the front end blade and β2<β1 can not only optimize the cutting force distribution of the front end blade in the cutting process, reduce the local load of the front end blade, but also can change the chip direction, delay the contact time of the front end chip and the second chamfer, delay the wear of the edge of the front end blade, thereby reducing the collapse risk of the tool cutting edge. The side end blade of the blade body is relatively provided with a third chamfer and a fourth chamfer, the plane where the third chamfer is located and the upper surface of the blade body form a third included angle β3, the plane where the fourth chamfer is located and the upper surface of the blade body form a fourth included angle β4, and β2<β3=β4. Since β3=β4>β2, that is, there is an angle difference between the chamfers of the side end blade and the front end blade, which can also cause the direction of the front end chip to change when the front end chip reaches the side end blade, so that the wear of the chip on the side end blade of the tool can be avoided, the collapse probability can be reduced, and the product quality requirement can be met. The tool edge structure provided by the utility model can change the cutting direction, greatly reduce the collapse probability of the edge, keep the surface roughness of the machined workpiece stable, improve the tool life, and meet the machining requirement.

[0020] The utility model provides a tool, including tool body and above-mentioned tool cutting edge structure, tool cutting edge structure is connected in one end of tool body. The tool cutting edge structure that this tool possesses namely the double chamfer design of front end blade not only can optimize the cutting force distribution of front end blade in cutting process, reduces the local load of front end blade, can change the chip direction simultaneously, delays the contact time of front end chip and second chamfer, delays the cutting edge wear of front end blade, thereby reduces the collapse risk of tool cutting edge. In addition, because beta 3=beta 4>beta 2, namely the angle difference of side end blade chamfer and front end blade chamfer, this still will lead to the direction change of front end chip when going to side end blade, can avoid that chip directly produces wear to the side end blade of tool, also will reduce the collapse blade probability, satisfies product quality requirement. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structure schematic diagram of tool provided by the utility model embodiment;

[0022] Figure 2 It is Figure 1 the enlarged view of A in figure;

[0023] Figure 3 It is the first enlarged view of tool cutting edge structure's partial provided by the utility model embodiment;

[0024] Figure 4 It is the second enlarged view of tool cutting edge structure's partial provided by the utility model embodiment;

[0025] Figure 5 It is the third enlarged view of tool cutting edge structure's partial provided by the utility model embodiment.

[0026] In the figure:

[0027] 1, blade body;11, first chamfer;12, second chamfer;13, third chamfer;14, fourth chamfer;

[0028] 2, tool body. DETAILED DESCRIPTION

[0029] In order to make the technical problem of the utility model, the technical scheme adopted and the technical effect reached more clear, the technical scheme of the utility model is further explained by specific implementation mode below in conjunction with the drawings. It can be understood that the specific embodiments described here are only used to explain the utility model, and not limit the utility model. In addition, it needs to be explained that, in order to facilitate the description, only the part related to the utility model is shown in the drawing, not all.

[0030] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through the indirect connection of intermediate medium, can be two element internal communication or two element mutual action relation.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0031] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the direct contact of the first and second features, also can include the contact of the first and second features not direct contact but through the contact between other features between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0032] In the description of the embodiment, the orientation or position relationship of the terms "on", "under", "left", "right" and the like is based on the orientation or position relationship shown in the drawing, only for the convenience of description and simplification operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0033] The technical scheme of the utility model is further illustrated below by specific embodiments in conjunction with the drawings.

[0034] As Figures 1 to 5As shown, the embodiment provides a tool edge structure, which comprises a tool edge body 1, the front edge of the tool edge body 1 is provided with a first chamfer 11 and a second chamfer 12, the second chamfer 12 is connected between the first chamfer 11 and the upper surface of the tool edge body 1, the plane where the first chamfer 11 is located and the upper surface of the tool edge body 1 form a first included angle β1, the plane where the second chamfer 12 is located and the upper surface of the tool edge body 1 form a second included angle β2, and β2<β1. The double chamfer design of the front edge and β2<β1 can not only optimize the cutting force distribution of the front edge in the cutting process, reduce the local load of the front edge, but also change the chip direction, delay the contact time of the front chip and the second chamfer 12, delay the edge wear of the front edge, thereby reducing the risk of collapse of the tool cutting edge. The side edge of the tool edge body 1 is relatively provided with a third chamfer 13 and a fourth chamfer 14, the plane where the third chamfer 13 is located and the upper surface of the tool edge body 1 form a third included angle β3, the plane where the fourth chamfer 14 is located and the upper surface of the tool edge body 1 form a fourth included angle β4, and β2<β3=β4. Since β3=β4>β2, that is, there is an angle difference between the chamfers of the side edge and the front edge, which will also cause the direction of the front chip to change when it reaches the side edge, so as to avoid the chip directly wearing the side edge of the tool, and also reduce the probability of edge collapse, thereby meeting the product quality requirements. The tool edge structure provided by the embodiment can change the cutting direction, greatly reduce the probability of edge collapse, and at the same time keep the surface roughness of the machined workpiece stable, improve the tool life, and meet the machining requirements.

[0035] Optionally, along the length direction of the tool edge body 1, the width of the plane where the first chamfer 11 is located is H1, and H1≤0.1mm. The small width of the first chamfer 11 can effectively ensure the sharpness of the first chamfer 11, facilitate cutting of the machined workpiece, and reduce the surface roughness of the machined workpiece.

[0036] Optionally, along the length direction of the tool edge body 1, the width of the plane where the second chamfer 12 is located is H2, and H2>H1. In specific implementation, the value range of H2 is 0.15mm≤H2≤0.5mm.

[0037] Optionally, the value range of the first included angle β1 is 20°≤β1≤60°.

[0038] Optionally, the value range of the second included angle β2 is 10°≤β2≤40°.

[0039] Optionally, the value range of the third included angle β3 and the fourth included angle β4 is β3=β4<60°.

[0040] Optionally, along the width direction of the blade body 1, the width of the plane containing the third chamfer 13 is H3, and the width of the plane containing the fourth chamfer 14 is H4, where H3 = H4 < H1. The smaller chamfers on both sides of the side blade help to better guide the chips to flow in a specific direction, reduce the risk of chip entanglement, and thus improve chip removal performance.

[0041] like Figure 1 As shown, this embodiment also provides a cutting tool, including a tool body 2 and the aforementioned cutting edge structure, which is connected to one end of the tool body 2. The cutting edge structure of this tool, namely a double chamfer design with β2 < β1, not only optimizes the cutting force distribution of the front edge during cutting and reduces the local load on the front edge, but also changes the chip direction, delaying the contact time between the front chip and the second chamfer 12, thus delaying edge wear and reducing the risk of chipping of the cutting edge. Furthermore, since β3 = β4 > β2, meaning there is an angle difference between the side edge chamfer and the front edge chamfer, the direction of the front chip changes when it reaches the side edge, preventing direct wear on the side edge of the tool and reducing the probability of chipping, thus meeting product quality requirements.

[0042] Optionally, the cutting edge structure and the tool body 2 are integrally formed. The tool body 2 and the cutting edge structure can be made of the same material, such as alloy or ceramic. The integrally formed tool has no weak points such as welds, which can reduce stress concentration and improve the structural integrity and reliability of the tool.

[0043] Optionally, the cutting edge structure is welded to the tool body 2. The tool body 2 can be made of an alloy material, and the cutting edge structure can be made of an ultra-hard material, such as PCBN (polycrystalline cubic boron nitride). PCBN has a hardness second only to diamond, and compared to diamond, it can remain stable at higher temperatures and has good chemical stability to iron group elements.

[0044] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A cutting edge structure, characterized by, The cutting edge body (1) is provided with a first chamfer (11) at the front end and a second chamfer (12) connected between the first chamfer (11) and the upper surface of the cutting edge body (1), the plane of the first chamfer (11) forms a first angle β1 with the upper surface of the cutting edge body (1), and the plane of the second chamfer (12) forms a second angle β2 with the upper surface of the cutting edge body (1), wherein β2 < β1. The side end of the cutting edge body (1) is oppositely provided with a third chamfer (13) and a fourth chamfer (14), the plane of the third chamfer (13) forms a third angle β3 with the upper surface of the cutting edge body (1), and the plane of the fourth chamfer (14) forms a fourth angle β4 with the upper surface of the cutting edge body (1), wherein β2 < β3 = β4.

2. The cutting edge structure according to claim 1, wherein Along the length direction of the cutting edge body (1), the width of the plane of the first chamfer (11) is H1, and H1 ≤ 0.1 mm.

3. The cutting edge structure according to claim 1, wherein Along the length direction of the cutting edge body (1), the width of the plane of the second chamfer (12) is H2, and 0.15 mm ≤ H2 ≤ 0.5 mm.

4. The cutting edge structure according to claim 1, wherein The first angle β1 is in the range of 20° ≤ β1 ≤ 60°.

5. The cutting edge structure according to claim 4, wherein The second angle β2 is in the range of 10° ≤ β2 ≤ 40°.

6. The cutting edge structure according to claim 5, wherein The third angle β3 and the fourth angle β4 are in the range of β3 = β4 < 60°.

7. The cutting edge structure according to claim 1 wherein, Along the width direction of the cutting edge body (1), the width of the plane of the third chamfer (13) is H3, and the width of the plane of the fourth chamfer (14) is H4, wherein H3 = H4 < H1.

8. A tool characterized by The cutting tool is provided with a cutter body (2) and the cutting edge structure according to any one of claims 1 to 7, and the cutting edge structure is connected to one end of the cutter body (2).

9. The tool of claim 8 wherein, The cutting edge structure and the cutter body (2) are integrally formed.

10. The knife of claim 8, wherein, The cutting edge structure is welded to the cutter body (2).

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