A composite spiral cutting knife

Abstract

The utility model discloses a composite spiral cutting tool, comprising a tool handle and a tool head, the front end of the tool handle is connected to the tool head, a first blade section and a second blade section are cross-arranged along the direction of the tool head's own axis, the first blade section and the second blade section are both obliquely arranged along the axis of the tool head and multiple groups are evenly arranged along the circumferential direction of the tool head, and the second blade section is a spiral cutting edge. The utility model solves the problem that existing cutting tools with straight blade edges easily cause burrs on the upper and lower surfaces of the cutting surface by cross-arranging two blade sections.

Description

Technical Field

[0001] The utility model relates to the technical field of woodworking cutters, in particular to a composite spiral cutting cutter. Background Art

[0002] Cutting knives are mostly used in cutting machines. In production, processes such as processing the plane and side of wood and boring inner holes on workpieces often require replacement of cutting knives of different specifications and shapes to meet the requirements of different positions of the workpiece.

[0003] The existing cutting knives have the following defects:

[0004] 1. The cutting knives on the market are generally two-edged or three-edged. Each blade is parallel to the axis and evenly distributed along the circumference. The chip groove is parallel to the axis. The blade runs straight from the bottom of the board to the top. This type of straight knife has only circumferential cutting force. During the processing, burrs are easily formed on the upper and lower surfaces of the workpiece being processed.

[0005] 2. The front cutting face of the existing cutting tool is usually a plane. The front angle composed of the plane structure will be limited as the tool blade diameter changes and the structure is limited, which ultimately leads to the front angle failing to reach the desired reasonable angle.

[0006] Therefore, it is necessary to improve the prior art to solve the above problems. Utility Model Content

[0007] The utility model aims to provide a composite spiral cutting knife, which solves the problem that the existing cutting knives with straight blades easily cause burrs on the upper and lower surfaces of the cutting surface through two cross-arranged blades.

[0008] In order to solve the problems existing in the above-mentioned prior art, the utility model is implemented through the following technical solutions:

[0009] A composite spiral cutting tool comprises a handle and a cutter head, wherein the cutter head is connected to the front end of the handle, and a first section of a blade and a second section of a blade are cross-arranged along the direction of the cutter head's own axis, the first section of the blade and the second section of the blade are both arranged obliquely along the axis of the cutter head and are evenly arranged in multiple groups along the circumferential direction of the cutter head, and the second section of the blade is a spiral cutting edge.

[0010] In the present scheme, a first section of a blade and a second section of a blade are cross-arranged on the cutter head along its own axial direction, and the first section of the blade and the second section of the blade are arranged obliquely along the axis of the cutter head. The inclined first section of the blade will generate an upward cutting force to prevent burrs from being generated on the lower surface of the workpiece being processed, and the inclined second section of the blade is also arranged as a spiral cutting edge, which will generate a downward cutting force to more effectively prevent burrs from being generated on the upper surface of the workpiece being processed.

[0011] As a further technical solution of the composite spiral cutting knife, the inclination angle between the first section of the blade and the axis of the cutter head is 10° to 20°, which is used to improve the burr cleaning efficiency of the cutting knife.

[0012] As a further technical solution of the composite spiral cutting knife, the inclination angle between the second blade and the axis of the cutter head is 10° to 20°, which is used to improve the burr cleaning efficiency of the cutting knife.

[0013] As a further technical solution of the composite spiral cutting knife, a positioning boss is further arranged between the knife handle and the knife head. The positioning boss is truncated cone-shaped, and the outer wall of the positioning boss is covered with fine threads, which can protect the surface of the knife handle when it accidentally scratches an object when the knife handle rotates.

[0014] As a further technical solution of the composite spiral cutting knife, a positioning ring groove is provided at the connection between the knife handle and the knife head, and the clamping efficiency of the cutting knife can be improved by the positioning ring groove.

[0015] As a further technical solution of the composite spiral cutting knife, in order to improve the cutting efficiency of the cutting knife, the projection of the end of the first blade section and the front end of the second blade section on the axis of the cutter head overlap;

[0016] The first blade section includes two blades, and the two blades are distributed at 180 degrees along the circumference of the blade head;

[0017] The second blade section includes two blades, and the two blades are distributed at 180 degrees along the circumference of the blade head.

[0018] As a further technical solution of the composite spiral cutting knife, in order to further improve the cutting efficiency of the cutting knife, the projection of the end of the first blade section and the front end of the second blade section on the axis of the cutter head overlap;

[0019] The first blade section includes four blades, and the four blades are distributed at 90 degrees along the circumference of the blade head;

[0020] The second blade section includes four blades, and the four blades are distributed at 90 degrees along the circumference of the blade head.

[0021] As a further technical solution of the composite spiral cutting knife, a front cutting surface extending outward is provided on the end of the second section of the blade away from the shank, and the outer periphery of the front cutting surface is an arc structure. By controlling the size of the arc, the size of the front angle of the blade can be effectively controlled, so that the front angle of the product can reach the desired reasonable angle, further avoiding edge bursting or burrs on the surface of the workpiece.

[0022] As a further technical solution of the composite spiral cutting knife, a first dust suction inlet and a second dust suction inlet are respectively provided on the top of one of the symmetrically arranged blades on the first section of the blade, and the first dust suction inlet and the second dust suction inlet are respectively connected to a first dust suction groove and a second dust suction groove arranged at the front end of the knife handle, so that the cutting knife can better absorb the cutting residue from the top of the knife head into the first dust suction groove and the second dust suction groove during rapid cutting. This can not only reduce the friction of the cutting knife during cutting, thereby reducing the wear of the cutting knife, thereby increasing the service life of the cutting knife.

[0023] As a further technical solution of the composite spiral cutting cutter, all the blades arranged on the first section of the blade are provided with multiple chip breaking grooves, and the chip breaking grooves opened on adjacent blades are staggered. The chip breaking grooves can reduce cutting resistance, improve the roughness level of the processed surface, improve processing accuracy and processing efficiency, and extend tool life.

[0024] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0025] The cutter head of the utility model is cross-arranged with a first blade section and a second blade section along its own axial direction, and the first blade section and the second blade section are arranged obliquely along the axis of the cutter head. The inclined first blade section will generate an upward cutting force to prevent burrs from being generated on the lower surface of the workpiece being processed, and the inclined second blade section is also arranged as a spiral cutting edge to generate a downward cutting force to more effectively prevent burrs from being generated on the upper surface of the workpiece being processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0027] Figure 1 This is a front view structural diagram of Embodiment 1 of the present utility model;

[0028] Figure 2 This is a schematic diagram of the three-dimensional structure of Example 1 of the utility model;

[0029] Figure 3 This is a schematic diagram of the top view of the structure of Example 1 of the utility model;

[0030] Figure 4 This is a schematic diagram of the three-dimensional structure of Example 2 of the utility model;

[0031] Figure 5 This is a front view structural diagram of Embodiment 3 of the present utility model;

[0032] Figure 6 This is a schematic diagram of the three-dimensional structure of Example 3 of the utility model;

[0033] Figure 7 This is a schematic diagram of the top view of the structure of Embodiment 3 of the present utility model;

[0034] Figure 8 This is a schematic diagram of the three-dimensional structure of Example 4 of the utility model;

[0035] Fig. 9 It is a schematic diagram of the three-dimensional structure of Embodiment 5, 6 or 7 of the present utility model;

[0036] Fig.10 It is a schematic diagram of the top view of the structure of Embodiment 5, 6 or 7 of the utility model;

[0037] Fig.11 This is a schematic diagram of the enlarged structure of the second blade of Embodiment 5, 6 or 7 of the utility model;

[0038] Fig.12 It is a schematic diagram of the three-dimensional structure of embodiment 5, 6 or 7 of the utility model at another viewing angle.

[0039] Marks and corresponding parts names in the attached drawings:

[0040] 1-handle, 2-tool head, 3-first blade section, 4-second blade section, 5-front blade surface, 6-first dust suction inlet, 7-second dust suction inlet, 8-first blade section chip removal groove, 9-blade, 10-second blade section chip removal groove, 11-second dust suction outlet, 12-second dust suction groove, 13-positioning boss, 14-chip breaker groove, 15-first dust suction outlet, 16-first dust suction groove, 17-positioning ring groove. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0042] Example 1

[0043] This embodiment 1 provides a composite spiral cutting knife, such as Figure 1-Figure 3 As shown, it includes a handle 1 and a cutter head 2. The front end of the handle 1 is connected to the cutter head 2. A first blade 3 and a second blade 4 are arranged crosswise on the cutter head 2 along its own axis direction, wherein the second blade 4 is arranged as a spiral blade edge, as shown in FIG. Figure 2As shown, the first blade section 3 and the second blade section 4 are evenly arranged in two groups along the circumferential direction of the cutter head 2, and the first blade section 3 and the second blade section 4 are arranged at an inclination of 20° along the axis of the cutter head 2, and the inclination directions are opposite. Specifically, the end of the first blade section 3 and the front end of the second blade section 4 on the axis of the cutter head 2 overlap with the projection of the first blade section 3, wherein the first blade section 3 includes two blades 9, and the two blades 9 are distributed at 180° along the circumference of the cutter head 2, and a first blade chip groove 8 is formed between the two blades 9 of the first blade section 3, and the second blade section 4 also includes two blades 9, and the two blades 9 are also distributed at 180° along the circumference of the cutter head 2, and a second blade chip groove 10 is formed between the two blades 9 of the second blade section 4.

[0044] Among them, see Figure 2-Figure 3 As shown, the front end of the second blade 4 extends out of the front end of the blade head 2 to form a front blade face 5. The extended front blade face 5 acts as a bottom cleaning tool. When the groove is cut, the extended portion can clean the bottom of the groove. Figure 3 It can be seen that the angles α and β correspond to the rake angle and back angle of the cutting tool respectively. The size of the rake angle directly affects the sharpness of the tool, and the size of the back angle affects the wear resistance and surface flatness of the tool. The rake face of the existing cutting tool is a plane, and the rake angle composed of the plane structure will be limited as the tool blade diameter changes and the structure is limited. Ultimately, the rake angle cannot reach the desired reasonable angle. Therefore, this embodiment makes the outer wall of the rake face 5 into an arc. By controlling the size of the arc, the size of the rake angle of the cutting edge can be effectively controlled, so that the rake angle of the cutting tool can reach the desired reasonable angle, which can effectively avoid the surface of the workpiece from bursting or burring.

[0045] Example 2

[0046] This embodiment 2 provides another composite spiral cutting knife based on the technical solution of embodiment 1, such as Figure 1-Figure 4 As shown, the difference is that a positioning ring groove 17 is provided at the connection between the tool handle 1 and the tool head 2, and the positioning ring groove 17 can improve the clamping efficiency of the cutting tool.

[0047] Example 3

[0048] This embodiment 3 provides another composite spiral cutting knife based on the technical solution of embodiment 1, such as Figure 5-Figure 7As shown, the difference is that the first blade section 3 and the second blade section 4 are both arranged to be inclined at 10° along the axis of the cutter head 2, and the inclination directions are opposite. Specifically, the end of the first blade section 3 coincides with the projection of the front end of the second blade section 4 on the axis of the cutter head 2, wherein the first blade section 3 includes 4 blades 9, and the 4 blades 9 are distributed at 90° along the circumference of the cutter head 2, and a first blade chip groove 8 is formed between two adjacent blades 9 of the first blade section 3. The second blade section 4 also includes 4 blades 9, and the 4 blades 9 are also distributed at 90° along the circumference of the cutter head 2, and a second blade chip groove 10 is formed between two adjacent blades 9 of the second blade section 4.

[0049] In this embodiment, in order to improve the roughness level of the machined surface, two chip breaker grooves 14 are provided on all the blades 9 arranged on the first section of the blade 3, and the chip breaker grooves 14 provided on adjacent blades 9 are staggered. The chip breaker grooves 14 can reduce the cutting resistance, improve the roughness level of the machined surface, improve the machining accuracy and efficiency, and extend the tool life.

[0050] Example 4

[0051] This embodiment 4 provides another composite spiral cutting tool based on the technical solution of embodiment 3, as shown in FIG. Figure 5-8 As shown, the difference is that a positioning ring groove 17 is provided at the connection between the tool handle 1 and the tool head 2, and the positioning ring groove 17 can improve the clamping efficiency of the cutting tool.

[0052] Example 5

[0053] This embodiment 5 provides a composite spiral cutting knife, such as Figure 9-11 As shown, it includes a handle 1 and a cutter head 2. The front end of the handle 1 is connected to the cutter head 2. A first blade 3 and a second blade 4 are arranged crosswise on the cutter head 2 along its own axis direction, wherein the second blade 4 is arranged as a spiral blade edge, as shown in FIG. Fig.11 As shown, the first blade section 3 and the second blade section 4 are evenly arranged in two groups along the circumferential direction of the cutter head 2, and the first blade section 3 and the second blade section 4 are arranged at an inclination of 20° along the axis of the cutter head 2, and the inclination directions are opposite. Specifically, the end of the first blade section 3 and the front end of the second blade section 4 on the axis of the cutter head 2 overlap with the projection of the first blade section 3, wherein the first blade section 3 includes two blades 9, and the two blades 9 are distributed at 180° along the circumference of the cutter head 2, and a first blade chip groove 8 is formed between the two blades 9 of the first blade section 3, and the second blade section 4 also includes two blades 9, and the two blades 9 are also distributed at 180° along the circumference of the cutter head 2, and a second blade chip groove 10 is formed between the two blades 9 of the second blade section 4.

[0054] Among them, see Figure 9-10 as well as Fig.12As shown, in order to facilitate the bottom cleaning of the workpiece groove, the front end portion of the second section of the blade 4 extends out of the front end of the cutter head 2 to form a front cutting edge 5. The extended front cutting edge 5 acts as a bottom cleaning knife. When grooving, the extended portion can clean the bottom of the groove, and the outer wall surface of the front cutting edge 5 is processed with an arc. By controlling the size of the arc, the size of the front angle of the cutting edge can be effectively controlled, so that the front angle of the cutting knife can reach the desired reasonable angle.

[0055] Example 6

[0056] This embodiment 6 provides another composite spiral cutting knife based on the technical solution of embodiment 5, such as Figure 9-12 As shown, the difference between this embodiment 2 and embodiment 1 is that the first blade section 3 and the second blade section 4 are both arranged to be inclined at 10° along the axis of the cutter head 2, and the inclination directions are opposite. Specifically, the end of the first blade section 3 coincides with the projection of the front end of the second blade section 4 on the axis of the cutter head 2, wherein the first blade section 3 includes 4 blades 9, and the 4 blades 9 are distributed at 90° along the circumference of the cutter head 2, and a first blade chip groove 8 is formed between two adjacent blades 9 of the first blade section 3, and the second blade section 4 also includes 4 blades 9, and the 4 blades 9 are also distributed at 90° along the circumference of the cutter head 2, and a second blade chip groove 10 is formed between two adjacent blades 9 of the second blade section 4.

[0057] Among them, see Figure 9-10 as well as Fig.12 As shown, in order to facilitate the bottom cleaning of the workpiece groove, the front end portion of the second blade 4 extends out of the front end of the cutter head 2 to form a front cutting surface 5, and the extended front cutting surface 5 plays the role of a bottom cleaning knife. When the groove is cut, the extended portion can clean the bottom of the groove. At the same time, the top end of one of the symmetrically arranged blades 9 on the first blade 3, that is, the corresponding front cutting surface 5, is respectively provided with a first dust suction inlet 6 and a second dust suction inlet 7. The first dust suction inlet 6 and the second dust suction inlet 7 are respectively connected to the first dust suction outlet 15 and the second dust suction outlet 11 arranged at the rear end of the cutter head 2. The first dust suction inlet 6 and the first dust suction outlet 15 as well as the first dust suction outlet 11 are connected to the first dust suction outlet 15 and the second dust suction outlet 11. The center line connecting the two dust suction inlets 7 and the second dust suction outlet 11 is also inclined along the axis of the cutter head 2, and the front end of the knife handle 1 is also provided with a first dust suction groove 16 and a second dust suction groove 12 corresponding to the first dust suction outlet 15 and the second dust suction outlet 11. When the cutting knife is used in high-speed rotation, downward suction is generated at the first dust suction groove 16 and the second dust suction groove 12, so that the cutting knife can better absorb the cutting residue from the top of the cutter head into the first dust suction groove 16 and the second dust suction groove 12 during rapid cutting. This can not only reduce the friction of the cutting knife during cutting, thereby reducing the wear of the cutting knife, thereby increasing the service life of the cutting knife.

[0058] Example 7

[0059] This embodiment 7 is based on the improvement of embodiment 5 or embodiment 6, and provides another composite spiral cutting knife, such as Figure 9-12 As shown, the difference is that all the blades 9 arranged on the first section of the blade 3 are provided with two chip breaker grooves 14, and the chip breaker grooves 14 opened on adjacent blades 9 are staggered. The chip breaker grooves 14 can reduce the cutting resistance, improve the roughness level of the machined surface, improve the machining accuracy and efficiency, and extend the tool life.

[0060] In this embodiment, please refer to Fig. 9 and Fig.10 As shown, a positioning boss 13 is provided between the handle 1 and the cutter head 2. The positioning boss 13 is truncated cone-shaped, and the outer wall of the positioning boss 13 is covered with fine threads, which can protect the surface of the handle 1 when the handle 1 accidentally scrapes against an object when rotating.

[0061] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A composite spiral cutting tool, comprising a tool handle (1) and a tool head (2), characterized in that: The cutter head (2) is connected to the front end of the cutter handle (1); a first section of blade (3) and a second section of blade (4) are cross-arranged on the cutter head (2) along its own axial direction; the first section of blade (3) and the second section of blade (4) are both arranged obliquely along the axis of the cutter head (2) and are evenly arranged in multiple groups along the circumferential direction of the cutter head (2); and the second section of blade (4) is a spiral blade.

2. A composite spiral cutting cutter according to claim 1, characterized in that: The inclination angle between the first blade (3) and the axis of the blade head (2) is 10° to 20°.

3. A composite spiral cutting cutter according to claim 2, characterized in that: The inclination angle between the second blade (4) and the axis of the blade head (2) is 10° to 20°.

4. A composite spiral cutting cutter according to claim 3, characterized in that: A positioning boss (13) is also provided between the tool handle (1) and the tool head (2); the positioning boss (13) is truncated cone-shaped, and the outer side wall of the positioning boss (13) is covered with fine threads.

5. The composite spiral cutting cutter according to claim 3, characterized in that: A positioning ring groove (17) is provided at the connection between the knife handle (1) and the knife head (2).

6. A composite spiral cutting cutter according to claim 5, characterized in that: The projections of the end of the first blade (3) and the front end of the second blade (4) on the axis of the blade head (2) overlap; The first blade section (3) comprises two blades (9), and the two blades (9) are distributed at 180° along the circumference of the blade head (2); The second blade section (4) comprises two blades (9), and the two blades (9) are distributed at 180° along the circumference of the blade head (2).

7. The composite spiral cutting cutter according to claim 5, characterized in that: The projections of the end of the first blade (3) and the front end of the second blade (4) on the axis of the blade head (2) overlap; The first blade section (3) comprises four blades (9), and the four blades (9) are distributed at 90 degrees along the circumference of the blade head (2); The second blade section (4) comprises four blades (9), and the four blades (9) are distributed at 90 degrees along the circumference of the blade head (2).

8. A composite spiral cutting cutter according to claim 6 or 7, characterized in that: An outwardly extending front cutting surface (5) is provided on the end of the second blade (4) away from the blade handle (1), and the outer periphery of the front cutting surface (5) is an arc structure.

9. A composite spiral cutting cutter according to claim 6 or 7, characterized in that: A first dust suction inlet (6) and a second dust suction inlet (7) are respectively arranged at the top of one of the symmetrically arranged blades (9) on the first blade edge (3); the first dust suction inlet (6) and the second dust suction inlet (7) are respectively connected to a first dust suction groove (16) and a second dust suction groove (12) arranged at the front end of the handle (1).

10. The composite spiral cutting cutter according to claim 9, characterized in that: All the blades (9) arranged on the first blade section (3) are provided with a plurality of chip breaking grooves (14), and the chip breaking grooves (14) provided on adjacent blades (9) are arranged in a staggered manner.

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