Gear cutting blade and cutting tool for dry cutting of bevel gear

Abstract

The utility model discloses a gear cutting blade for dry cutting of a bevel gear, which comprises a blade body, the blade body comprises a hard alloy part and a non-hard alloy part, and a cutting edge for dry cutting of the bevel gear is formed on the hard alloy part at one end of the blade body; the length of the blade body is set to be the length of an existing blade body, meanwhile, the hard alloy part and the non-hard alloy part form a matched structure within the length range, the non-hard alloy part is mainly distributed in a clamping area used for clamping the tooth cutting blade, and the hard alloy part is mainly distributed in a working area of a cutting edge. And the length of the hard alloy part is at least more than 30% of the length of the blade body, so that a new cutting edge can be formed by continuously grinding towards the other end of the blade body along the length direction of the blade after the cutting edge fails. Through the improvement, the use amount of rare elements and high-price elements can be reduced, and the utilization rate of the hard alloy in the bevel gear dry cutting tooth cutter strip is also increased.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, specifically to a cutting tool and a cutting blade for dry cutting of bevel gears. Background Technology

[0002] The cutting blades used for dry cutting of bevel gears are mainly used in conjunction with the cutter head. In actual use, the cutting blades are ground into the required tooth shape of the bevel gear, then the cutting blades are assembled onto the cutter head, and then the cutter head is installed on the cutting machine tool. A complete machining path is formed on the cutting machine tool, thereby completing the machining of the bevel gear tooth shape.

[0003] Currently, the cutting blades used for dry cutting of bevel gears are made of solid cemented carbide, with a long strip structure and various cross-sectional and longitudinal shapes, such as square, trapezoidal, and pentagonal cross-sections. The main raw materials for these cutting blades consist of approximately 90% WC (tungsten carbide, a rare and strategic resource) and 10% cobalt (a rare earth element). The limited and expensive resources of rare and rare earth elements result in high costs for the cutting blades, leading to higher costs per gear.

[0004] Furthermore, the effective utilization rate of carbide in integral carbide cutting tool bars is very low. Part of it is ground into grinding material (also known as abrasive wheel dust) during use, while the remaining portion (the tail end) only serves a positioning and clamping function and does not participate in cutting; it is considered a surplus part of the cutting tool bar. Both of these aspects result in a waste of carbide in bevel gear dry cutting tool bars.

[0005] Previously, we tried increasing the length of the cemented carbide material and the total length of the cutting tool. However, this approach increases the lifespan and output of the cutting tool by adding homogeneous material. This does not significantly improve the utilization rate of cemented carbide, nor does it effectively reduce costs. Furthermore, increasing the length may lead to the inability to install and use the tool. It merely solves the problem of repeated use. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a cutting blade for dry cutting of bevel gears.

[0007] To solve the above-mentioned technical problems, this utility model discloses a cutting blade for dry cutting of bevel gears, including a blade body. The blade body includes interconnected carbide and non-carbide parts. The carbide part at one end of the blade body forms a cutting edge for dry cutting of bevel gears. The length of the blade body is set to a length that is convenient for installation of existing blade bodies. At the same time, the carbide and non-carbide parts form a mating structure within the aforementioned length range, so that the non-carbide part is mainly distributed in the clamping area for clamping the cutting blade, and the carbide part is mainly distributed in the working area of ​​the cutting edge of the cutting blade. The length of the carbide part should be at least 30% of the length of the blade body, so that after the cutting edge fails, it can be continuously ground along the length direction of the blade body to the other end to form a new cutting edge.

[0008] The above-mentioned technical solution of this utility model reduces the amount of cemented carbide used without substantially changing the length of the cutting tool, thus achieving the effect of using cemented carbide cutting tools throughout the entire process.

[0009] As a further improvement to the aforementioned cutting tooth blade, one end of the non-carbide portion is provided with a recessed mounting portion that is lower than at least one side of the blade body. The carbide portion is installed in the recessed mounting portion, and the cutting edge is exposed outside the non-carbide portion.

[0010] As a further improvement to the aforementioned cutting tooth blade, the recessed mounting portion includes a cemented carbide mounting groove formed on at least one side of the blade body, the cemented carbide mounting groove communicating with at least one side of the blade body in the circumferential direction.

[0011] As a further improvement to the aforementioned cutting tooth blade, the carbide mounting groove penetrates at least two adjacent sides of the blade body in the circumferential direction.

[0012] As a further improvement to the aforementioned cutting tooth blade, the non-hard alloy part is provided with a recessed mounting part that penetrates at least three adjacent sides of the blade body in the circumferential direction, forming a fixing block through the recessed mounting part, and the hard alloy part is provided with a fixing groove that engages with the fixing block.

[0013] As a further improvement to the aforementioned cutting tooth blade, the recessed mounting portion is connected to all circumferential sides of the blade body.

[0014] As a further improvement to the aforementioned cutting tooth blade, the carbide portion and the non-carbide portion are joined at the ends, and the carbide portion and the non-carbide portion are connected as one unit by a connector provided at the ends.

[0015] As a further improvement to the aforementioned cutting tooth blade, the end of the cemented carbide part that is joined is provided with a threaded hole, and the end of the non-cemented carbide part that is joined is provided with a stepped hole. The connecting member is a screw, which connects the cemented carbide part and the non-cemented carbide part by connecting the stepped hole and the threaded hole.

[0016] As a further improvement to the aforementioned cutting tooth blade, the contact surfaces of the cemented carbide portion and the non-cemented carbide portion are connected through a large-area welding zone.

[0017] As a further improvement to the aforementioned cutting tooth blade, the area of ​​the large-area welding zone is 15mm × 20mm or larger. To improve the connection stability between the carbide and non-carbide parts and to facilitate repeated grinding to form new cutting edges, the aforementioned large-area welding connection method is preferred.

[0018] As a further improvement to the aforementioned cutting tooth blade, the non-hard alloy portion is made of mold steel. Due to the greater difficulty in welding, mold steel with a coefficient of thermal expansion closer to that of hard alloy and a stronger affinity for hard alloy is preferred.

[0019] As a further improvement to the aforementioned cutting blade, the cutting edge is coated with a coating, and the area near the junction of the carbide portion and the non-carbide portion is designated as a coating avoidance zone. During repeated coating applications to the cutting edge, this coating avoidance zone is created near the junction of the carbide and non-carbide portions, preventing the coating from eroding the copper-based weld. Since this invention requires multiple sharpenings and repeated coating of newly sharpened cutting edges, the absence of a coating avoidance zone would cause the coating material to repeatedly erode the junction, affecting the stability of the blade's subsequent operation.

[0020] As a further improvement to the aforementioned cutting tooth blade, the non-hard alloy part is provided with a subtractive hollow structure or the non-hard alloy part is used as a mounting part for mounting the cutting tooth blade.

[0021] As a further improvement to the aforementioned cutting tooth blade, the mounting area is filled with copper. Copper has a low melting point, making it easier to install onto the cutter head for machining.

[0022] As a general technical concept, this utility model also provides a cutting tool for dry cutting of bevel gears, including a cutter head and a plurality of cutting blades of the above-mentioned utility model mounted on the cutter head, wherein the cutting blades are provided with a root cutting edge, a main cutting edge and a secondary cutting edge.

[0023] Compared with the prior art, the advantages of this utility model are:

[0024] This invention uses cemented carbide for the cutting portion of the cutter body, while using steel and / or other non-cemented materials for the non-cutting portion. When the original root cutting edge, main cutting edge, or secondary cutting edge becomes severely worn and no longer meets the requirements for continued dry cutting of bevel gears, grinding is performed on the tail of the cutter body using a grinding wheel. This forms new root cutting edges, main cutting edges, and secondary cutting edges in the cemented carbide portion, thereby reducing the amount of rare and expensive elements used and improving the utilization rate of cemented carbide in dry cutting cutter bodies for bevel gears. Attached Figure Description

[0025] The accompanying drawings, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0026] Figure 1 This is an isometric schematic diagram of the cutting blade for dry cutting of bevel gears disclosed in Embodiment 1 of this utility model (grinding to form the root cutting edge, main cutting edge and secondary cutting edge).

[0027] Figure 2 This is a schematic diagram of the backward grinding of a cutting blade for dry cutting of bevel gears, as disclosed in Embodiment 1 of this utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the cutting blade for dry cutting of bevel gears disclosed in Embodiment 1 of this utility model; wherein, the oblique cross-section is divided into steel and the powder cross-section is divided into cemented carbide (the same below).

[0029] Figure 4 for Figure 3 A schematic AA sectional view (quadrilateral section);

[0030] Figure 5 for Figure 3 AA sectional view (pentagonal section);

[0031] Figure 6 for Figure 3 A schematic AA section view (hexagonal section);

[0032] Figure 7 for Figure 3 AA sectional view (heptagonal section);

[0033] Figure 8 This is a schematic diagram of the structure of the cutting blade for dry cutting of bevel gears disclosed in Embodiment 2 of this utility model;

[0034] Figure 9 for Figure 8 A schematic sectional view of BB (one of several cross-sections; for other cross-section shapes, refer to Example 1).

[0035] Figure 10 This is a schematic diagram of the structure of the cutting blade for dry cutting of bevel gears disclosed in Embodiment 3 of this utility model;

[0036] Figure 11 for Figure 10 A CC cross-sectional view (one of several cross-sections; for other cross-section shapes, refer to Example 1).

[0037] Figure 12 This is a schematic diagram of the structure of the cutting blade for dry cutting of bevel gears disclosed in Embodiment 4 of this utility model;

[0038] Figure 13 for Figure 12 A schematic cross-sectional view of DD (one of several cross-sections; for other cross-section shapes, refer to Example 1).

[0039] Figure 14 This is a schematic diagram of the structure of the cutting blade for dry cutting of bevel gears disclosed in Embodiment 5 of this utility model;

[0040] Figure 15 This is a schematic diagram of the structure of the cutting blade for dry cutting of bevel gears disclosed in Embodiment Six of this utility model;

[0041] Figure 16 This is a schematic diagram of the structure of the cutting blade for dry cutting of bevel gears disclosed in Embodiment 7 of this utility model;

[0042] Figure 17 for Figure 16 A schematic cross-sectional view of EE (one of several cross-section shapes; for other cross-section shapes, refer to Example 1).

[0043] Figure 18 This is a schematic diagram of the structure of the cutting blade for dry cutting of bevel gears disclosed in Embodiment 8 of this utility model;

[0044] Figure 19 for Figure 18 A schematic cross-sectional view of FF (one of several cross-sections; for other cross-section shapes, refer to Example 1).

[0045] Figure 20 This is a schematic diagram of the installation structure of the cutting blade for dry cutting of bevel gears on the cutter head (the left side is the blade body 1 of this application, and the right side is the conventional integral blade 21).

[0046] Figure 21 This is a schematic diagram of the structure of the cutting blade for dry cutting of bevel gears disclosed in Embodiment 8 of this utility model;

[0047] Figure 22 for Figure 21A schematic diagram of the GG section (a section without filling; for various cross-sectional shapes, refer to Example 1).

[0048] Figure 23 for Figure 21 A cross-sectional view of the GG section with steel filling (using the filled section; for various cross-sectional shapes, refer to Example 1).

[0049] Legend:

[0050] 1. Tool body; 2. Carbide part; 3. Non-carbide part; 4. Tooth root cutting edge; 5. Main cutting edge; 6. Secondary cutting edge; 7. Upper side; 8. Carbide part mounting groove; 9. Front side; 10. Left side; 11. Right side; 12. Fixing block; 13. Fixing groove; 14. Threaded hole; 15. Stepped hole; 16. Screw; 17. Lower side; 18. Subtractive hollow structure; 19. Mounting hole; 20. Tool disc; 21. Integral tool. Detailed Implementation

[0051] To facilitate understanding of this utility model, the following description will be provided in more comprehensive and detailed manner with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.

[0052] Example 1:

[0053] like Figures 1-7 , Figure 20 As shown, this utility model discloses a cutting blade for dry cutting of bevel gears, including a blade body 1, which is mounted on a cutter disc 20. The blade body 1 is a long strip structure, comprising a cemented carbide portion 2 and a non-cemented carbide portion 3 connected to each other. The non-cemented carbide portion 3 is made of steel and / or other materials. The cemented carbide portion 2 at one end of the blade body 1 forms a root cutting edge 4, a main cutting edge 5, and a secondary cutting edge 6 for dry cutting of bevel gears. The length of the blade body 1 is set to a length that is convenient for installation of existing blade bodies, while the cemented carbide portion 2 and the non-cemented carbide portion 3 form a mating structure within the aforementioned length range, such that the non-cemented carbide portion 3 is mainly distributed in the clamping area for clamping the cutting blade, and the cemented carbide portion 2 is mainly distributed in the working area of ​​the cutting edge of the cutting blade (see...). Figure 20Furthermore, the length of the carbide portion 2 should be at least 30% of the length of the cutter body 1, so that after the cutting edge fails, it can be continuously ground towards the other end of the cutter body (1) along the length direction of the cutter body to form a new cutting edge. That is, the part of the cutter body 1 that participates in cutting uses carbide, while the part that does not participate in cutting uses steel and / or other non-carbide materials. When the original root cutting edge 4, main cutting edge 5, and secondary cutting edge 6 are severely worn and do not meet the requirements for continued dry cutting of bevel gears, grinding is performed on the tail of the cutter body 1 by a grinding wheel, thereby continuously forming new root cutting edge 4, main cutting edge 5, and secondary cutting edge 6 in the carbide portion 2. Compared with the traditional integral cutter 21, the amount of rare elements and high-priced elements is reduced, and the utilization rate of carbide in the dry cutting cutter of bevel gears is also improved.

[0054] In this embodiment, one end of the non-carbide part 3 is provided with a recessed mounting portion lower than the upper side 7 of the cutter body 1. The carbide part 2 is installed in the recessed mounting portion, and the root cutting edge 4, main cutting edge 5, and secondary cutting edge 6 are exposed outside the non-carbide part 3. It is the same as or similar to the external structure and size of existing cutter bars, which facilitates installation on the cutter head 20. Specifically, the recessed mounting portion is a carbide part mounting groove 8 provided on at least one side of the cutter body 1 (the upper side 7 in this embodiment). The carbide part mounting groove 8 is a rectangular recessed structure, and the carbide part mounting groove 8 is connected to at least one side of the cutter body 1 in the circumferential direction (in this embodiment, it is only connected to the front side 9). Thus, the left, right, and rear sides of the carbide part 2 can abut against the inner wall of the carbide part mounting groove 8 (wherein, see Figure 3 In terms of position, the left side of the cemented carbide part 2 is close to the left side 10, the right side is close to the right side 11, and the rear side (that is, the side away from the front side 9 and opposite to the front side 9) improves the installation strength.

[0055] In this embodiment, the toothed blade can be replaced with... Figures 4-7 The various cross-sectional forms will not affect the application effect of this embodiment.

[0056] Compared to cutting blades made entirely of carbide materials, Figures 4-7 The product shown in the embodiment uses only 30% to 50% of the carbide used in the all-carbide cutting blade (calculated by the cross-sectional area of ​​the carbide and the length of the carbide distribution), but the number of products produced and the production efficiency are comparable to existing all-carbide cutting blade products. That is, the production cost can be reduced by more than 50% compared with existing cutting blade products.

[0057] Example 2:

[0058] In this embodiment, the blade body 1 can also be the same as in Embodiment 1, having various cross-sectional shapes. The cemented carbide mounting groove 8 penetrates the left side 10 or right side 11 of the blade body 1. The cemented carbide mounting groove 8 is also a rectangular countersunk hole, such as... Figures 8-9 As shown, the left and rear sides of the cemented carbide part 2 can abut against the inner wall of the cemented carbide part mounting groove 8 (similarly, the left side of the cemented carbide part 2 is close to the left side surface 10, and the rear side is the other side that is far away from the front side surface 9 and opposite to the front side surface 9), thus achieving a high mounting strength.

[0059] Compared to cutting blades made entirely of carbide materials, Figures 8-9 The product shown in the embodiment uses only 30% to 50% of the carbide used in the all-carbide cutting blade (calculated by the cross-sectional area of ​​the carbide and the length of the carbide distribution), but the number of products produced and the production efficiency are comparable to existing all-carbide cutting blade products. That is, the production cost can be reduced by more than 50% compared with existing cutting blade products.

[0060] Example 3:

[0061] In this embodiment, the blade body 1 can also be the same as in Embodiment 1, having various cross-sectional shapes, such as... Figures 10-11 As shown, the cemented carbide mounting groove 8 is connected to at least two adjacent sides of the blade body 1. Specifically, the recessed mounting part is installed on the upper side 7 of the blade body 1, and the recessed mounting part is connected to three adjacent sides of the blade body 1, namely the front side 9, the left side 10, and the right side 11.

[0062] Compared to cutting blades made entirely of carbide materials, Figures 10-11 The product shown in the embodiment uses only 30% to 50% of the carbide used in the all-carbide cutting blade (calculated by the cross-sectional area of ​​the carbide and the length of the carbide distribution), but the number of products produced and the production efficiency are comparable to existing all-carbide cutting blade products. That is, the production cost can be reduced by more than 50% compared with existing cutting blade products.

[0063] Example 4:

[0064] In this embodiment, the blade body 1 can also be the same as in Embodiment 1, having various cross-sectional shapes, such as... Figures 12-13 As shown, the non-hard alloy part 3 forms a fixing block 12 by lowering the mounting part below the upper side 7, left side 10 and right side 11 of the blade body 1. The hard alloy part 2 is provided with a fixing groove 13 that engages with the fixing block 12. Specifically, the hard alloy part 2 has a door-shaped structure and has multiple different profiles that match the non-hard alloy part 3. The installation strength of the hard alloy part 2 is high.

[0065] Compared to cutting blades made entirely of carbide materials, Figures 12-13 The product in the illustrated embodiment uses only 50% to 55% of the carbide used in the all-carbide cutting blade (calculated by the cross-sectional area of ​​the carbide and the length of the carbide distribution), but the number of products produced and the production efficiency are comparable to existing all-carbide cutting blade products, that is, the production cost can be reduced by more than 30% compared with existing cutting blade products.

[0066] Example 5:

[0067] In this embodiment, the blade body 1 can also be the same as in Embodiment 1, having various cross-sectional shapes, such as... Figure 14 As shown, the cemented carbide part 2 has a threaded hole 14 at the mating position, and the non-cemented carbide part 3 has a stepped hole 15. The connecting component is a screw 16, with the screw head inserted into the stepped hole 15. The screw 16 connects the cemented carbide part 2 and the non-cemented carbide part 3 by connecting the stepped hole 15 and the threaded hole 14. This also helps to reduce the amount of rare and high-priced elements used. The screw 16 connection method facilitates the assembly, disassembly, and replacement of the cemented carbide part 2 and the non-cemented carbide part 3. Figure 20 As shown, as the length of the cutter body 1 decreases, the clamping screw will gradually approach the steel part of the non-hard alloy part 3. In order to maximize the use of hard alloy, the clamping screw of the cutter head can be pressed precisely at the connection between the hard alloy part 2 and the non-hard alloy part 3, provided that the clamping length of the cutter is met.

[0068] Compared to cutting blades made entirely of carbide materials, Figures 14-15 The product shown in the embodiment uses only 43% to 60% of the carbide used in the all-carbide cutting blade (calculated by the cross-sectional area of ​​the carbide and the length of the carbide distribution), but the number of products produced and the production efficiency are comparable to existing all-carbide cutting blade products. That is, the production cost can be reduced by more than 30% compared with existing cutting blade products.

[0069] Example 6:

[0070] In this embodiment, the blade body 1 can also be the same as in Embodiment 1, having various cross-sectional shapes, such as... Figure 15As shown, the cemented carbide part 2 and the non-cemented carbide part 3 are joined at their ends, and are connected as a whole by a connector provided at the ends. The connector in this application can be a protrusion and groove mating structure at the ends of the cemented carbide part 2 and the non-cemented carbide part 3, thereby forming an integral structure. As the length of the cutter body 1 decreases, the clamping screw will gradually approach the steel part that is the non-cemented carbide part 3. In order to ensure maximum utilization of cemented carbide, while meeting the clamping length of the cutter, the clamping screw of the cutter head can be pressed precisely at the weld joint between the cemented carbide part 2 and the non-cemented carbide part 3.

[0071] Compared to cutting blades made entirely of carbide materials, Figure 15 The product shown in the embodiment uses only 43% to 60% of the carbide used in the all-carbide cutting blade (calculated by the cross-sectional area of ​​the carbide and the length of the carbide distribution), but the number of products produced and the production efficiency are comparable to existing all-carbide cutting blade products. That is, the production cost can be reduced by more than 30% compared with existing cutting blade products.

[0072] Example 7:

[0073] In this embodiment, the blade body 1 can also be the same as in Embodiment 1, having various cross-sectional shapes, such as... Figures 16-17 As shown, the lower side 17 of the cemented carbide part 2 is provided with a mounting hole 19 as a mounting part for the tool holder area. The non-cemented carbide part 3 can be installed in the mounting hole 19 and filled with copper material, or the non-cemented carbide part 3 can be directly omitted as described in Embodiment 9. This can also reduce the amount of rare elements and high-priced elements used. At the same time, the non-cemented carbide part 3 can improve the overall strength of the tool body 1.

[0074] Compared to cutting blades made entirely of carbide materials, Figure 16 The product shown in the embodiment uses only 83% to 85% of the carbide used in the all-carbide cutting blade (calculated by the cross-sectional area of ​​the carbide and the length of the carbide distribution), but the number of products produced and the production efficiency are comparable to existing all-carbide cutting blade products, that is, the production cost can be reduced by more than 10% compared with existing cutting blade products.

[0075] Example 8:

[0076] In this embodiment, the blade body 1 can also be the same as in Embodiment 1, having various cross-sectional shapes, such as... Figures 18-19As shown, the non-hard alloy part 3 is a subtractive hollow structure 18 set on the lower side 17 of the blade body 1 as a mounting part, without the use of copper material for filling; the rake face of the blade can be changed from a flat surface to a bevel, ensuring that the rake angle of the blade is not affected. This can also reduce the amount of rare and high-priced elements used.

[0077] Compared to cutting blades made entirely of carbide materials, Figure 16 The product shown in the embodiment uses only 79% to 81% of the carbide used in the all-carbide cutting blade (calculated by the cross-sectional area of ​​the carbide and the length of the carbide distribution), but the number of products produced and the production efficiency are comparable to existing all-carbide cutting blade products, that is, the production cost can be reduced by more than 10% compared with existing cutting blade products.

[0078] Example 9:

[0079] In this embodiment, the blade body 1 can also be the same as in Embodiment 1, having various cross-sectional shapes, such as... Figures 21-22 As shown, the rear plane of the tool bar body 1 is modified to a V-shape, and the cemented carbide on the back of the tool bar that does not participate in cutting is removed; as Figure 23 As shown, copper is used for filling, or as... Figure 22 As shown, steel filler can be omitted; the rake face of the blade can be changed from a flat surface to a bevel, ensuring that the rake angle of the blade is not affected. This can also reduce the amount of rare and high-priced elements used.

[0080] Compared to cutting blades made entirely of carbide materials, Figures 21-23 The product shown in the embodiment uses only 83% to 85% of the carbide used in the all-carbide cutting blade (calculated by the cross-sectional area of ​​the carbide and the length of the carbide distribution), but the number of products produced and the production efficiency are comparable to existing all-carbide cutting blade products, that is, the production cost can be reduced by more than 10% compared with existing cutting blade products.

[0081] In the above embodiments, when the cemented carbide part 2 and the non-cemented carbide part 3 are welded, the welding area is between 15mm×15mm and 30mm×30mm, which is much larger than the general welding area. Furthermore, by selecting mold steel with better compatibility with cemented carbide, the welding quality can be further guaranteed.

[0082] During the repeated coating process of the cutting edge, a coating material is placed at the junction of the carbide part and the non-carbide part to form a coating avoidance zone in the vicinity of the area, which prevents the coating from eroding the weld of the copper base. If the coating avoidance zone is not set, the coating material will repeatedly erode the junction, affecting the stability of the tool bar in subsequent work.

[0083] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A cutting blade for dry cutting of bevel gears, characterized in that, The tool includes a tool body (1), which includes a carbide portion (2) and a non-carbide portion (3) connected to each other. The carbide portion (2) at one end of the tool body (1) forms a cutting edge for dry cutting of bevel gears. The length of the tool body (1) is set to a length that is convenient for installation of the existing tool body (1), while the carbide portion (2) and the non-carbide portion (3) form a mating structure within the aforementioned length range, so that the non-carbide portion (3) is mainly distributed in the clamping area for clamping the cutting tool, and the carbide portion (2) is mainly distributed in the working area of ​​the cutting edge of the cutting tool. The length of the carbide portion (2) should be at least 30% of the length of the tool body (1), so that after the cutting edge fails, it can be continuously ground along the length direction of the tool body (1) to form a new cutting edge.

2. The cutting blade for dry cutting of bevel gears according to claim 1, characterized in that, One end of the non-hard alloy part (3) is provided with a recessed mounting part that is at least one side lower than the blade body (1), and the hard alloy part (2) is installed in the recessed mounting part and the cutting edge is exposed outside the non-hard alloy part (3).

3. The cutting blade for dry cutting of bevel gears according to claim 2, characterized in that, The recessed mounting portion includes a cemented carbide mounting groove (8) formed on the blade body (1), and the cemented carbide mounting groove (8) communicates with at least one side of the blade body (1) in the circumferential direction.

4. The cutting blade for dry cutting of bevel gears according to claim 3, characterized in that, The cemented carbide mounting groove (8) is connected to at least two adjacent sides of the blade body (1) in the circumferential direction.

5. The cutting blade for dry cutting of bevel gears according to claim 2, characterized in that, The non-hard alloy part (3) is provided with a recessed mounting part that penetrates at least three adjacent sides of the blade body (1) in the circumferential direction, and a fixing block (12) is formed by the recessed mounting part. The hard alloy part (2) is provided with a fixing groove (13) that engages with the fixing block (12).

6. The cutting blade for dry cutting of bevel gears according to claim 5, characterized in that, The sunken mounting part is connected to all the circumferential sides of the blade body (1).

7. The cutting blade for dry cutting of bevel gears according to claim 1, characterized in that, The cemented carbide part (2) and the non-cemented carbide part (3) are joined at the ends, and the cemented carbide part (2) and the non-cemented carbide part (3) are connected as one unit by a connector provided at the ends.

8. The cutting blade for dry cutting of bevel gears according to claim 7, characterized in that, The cemented carbide part (2) has a threaded hole (14) at the end where it is joined, and the non-cemented carbide part (3) has a stepped hole (15) at the end where it is joined. The connector is a screw (16), which connects the cemented carbide part (2) and the non-cemented carbide part (3) by connecting the stepped hole (15) and the threaded hole (14).

9. The cutting blade for dry cutting of bevel gears according to any one of claims 1 to 8, characterized in that, The contact surfaces of the hard alloy part (2) and the non-hard alloy part (3) are connected by a large-area welding zone.

10. The cutting blade for dry cutting of bevel gears according to claim 9, characterized in that, The area of ​​the large-area welding zone is 15mm × 20mm or larger.

11. The cutting blade for dry cutting of bevel gears according to claim 9, characterized in that, The non-hard alloy part is a non-hard alloy part made of mold steel.

12. The cutting blade for dry cutting of bevel gears according to any one of claims 1 to 8, characterized in that, The cutting edge is covered with a coating, and a coating avoidance zone is set near the connection between the cemented carbide part (2) and the non-cemented carbide part (3).

13. The cutting blade for dry cutting of bevel gears according to claim 1, characterized in that, The non-hard alloy part (3) is provided with a subtractive hollow structure (18) or a mounting part for mounting the cutting tooth strip by means of the default non-hard alloy part (3).

14. The cutting blade for dry cutting of bevel gears according to claim 13, characterized in that, The area of ​​the mounting section is filled with copper.

15. A cutting tool for dry cutting of bevel gears, characterized in that, The tool includes a cutter head (20) and a plurality of cutting blades according to any one of claims 1 to 14 mounted on the cutter head (20), wherein the cutting blades are provided with a root cutting edge (4), a main cutting edge (5) and a secondary cutting edge (6).

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