Cutting knife capable of preventing wood from being damaged

Abstract

The utility model discloses a cutting knife for preventing timber from being damaged, which comprises a knife handle and a knife head, the knife head is coaxially and fixedly arranged on the knife handle, at least two cutting blocks are uniformly and fixedly arranged on the knife head, side cutting surfaces are arranged on the cutting blocks, and the included angle between each side cutting surface and the radius direction of the knife head is 14-16 degrees. A side cutting edge is formed between the side cutting face and the outer side face of the cutting block and arranged in a right-handed rotation mode, and the spiral angle ranges from 2 degrees to 8 degrees. Due to the fact that the spiral angle of the side cutting edge 4 ranges from 2 degrees to 8 degrees, the spiral angle of the side cutting edge is small, better discharging is achieved during machining, meanwhile, when machining is finished, wood cannot be damaged during cutter retracting of the cutting cutter, and follow-up repairing of the wood is avoided.

Description

Technical Field

[0001] The utility model relates to the field of cutting knives, in particular to a cutting knife capable of preventing wood from being damaged. Background Art

[0002] During the wood processing, the cutting knife plays the role of grooving and drilling. In order to facilitate chip removal, a right-hand spiral groove is provided on the cutting knife. After the processing is completed, when the cutting knife is lifted, there are sawdust in the spiral groove. When the sawdust moves up with the cutting knife, there is friction between the wood and the sawdust. When the friction is large, the surface of the wood will be damaged. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a cutting knife which can prevent wood from being damaged.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A cutting knife for preventing wood from being damaged comprises a knife handle and a knife head, wherein the knife head is coaxially fixedly arranged on the knife handle, at least two cutting blocks are evenly and fixedly arranged on the knife head, a side cutting surface is arranged on the cutting block, an angle between the side cutting surface and the knife head in the radial direction is 14 to 16 degrees, a side cutting edge is formed between the side cutting surface and the outer side surface of the cutting block, and the side cutting edge is spirally arranged and the spiral angle is 2 to 8 degrees.

[0006] Furthermore, five cutting blocks are evenly arranged on the cutter head.

[0007] Furthermore, the cutting block is provided with a side back surface, and a discharge groove is formed between the side back surface and the side cutting surface.

[0008] Furthermore, the angle between the side surfaces of the discharge trough is 74-76°.

[0009] Furthermore, the cutting block is provided with a first edge face and a second edge face, the first edge face is arranged between the side cutting face and the second edge face, and the second edge face is arranged between the first edge face and the side back face.

[0010] Furthermore, the end of the cutting block is provided with an end cutting surface and an end back surface, the end cutting surface is provided with a serrated cutting edge and one side edge is connected to the end back surface, and one side edge of the end back surface is connected to the side back surface.

[0011] Furthermore, the end cutting surface is inclined toward the back side of the end and the inclination angle is 19-21 degrees.

[0012] Furthermore, the intersection point between the serrated cutting edge and the side cutting edge is 0.4 to 0.6 mm higher than the center point of the cutter head.

[0013] Furthermore, the diameter of the side cutting edge is 7.95-8.05 mm.

[0014] Furthermore, the diameter of the side and back surfaces is 4.0 to 5.0 mm.

[0015] The beneficial effects of the utility model are:

[0016] 1) In the present technology, the spiral angle of the side cutting edge 4 is 2 to 8 degrees. The small spiral angle of the side cutting edge can achieve better material discharge during processing. At the same time, at the end of processing, the cutting knife will not cause damage to the wood when withdrawing the knife, avoiding subsequent repairs to the wood.

[0017] 2) In the present technology, setting five cutting blocks means setting five side cutting edges and five serrated cutting edges, which can not only improve the processing efficiency, but also increase the service life of the cutting knife, while also making the wood processing smoother and avoiding secondary cutting of the wood.

[0018] 3) In the present technology, a first edge face and a second edge face are provided on the cutting block so that the side cutting edge can better cut the wood and reduce friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the three-dimensional structure diagram of the cutting knife;

[0020] Figure 2 This is the side view of the cutting knife;

[0021] Figure 3 This is the end face structure diagram of this cutting knife;

[0022] In the figure, 1-handle, 2-knife head, 3-side cutting surface, 4-side cutting edge, 5-side back surface, 6-discharge groove, 7-first edge surface, 8-second edge surface, 9-end cutting surface, 10-end back surface, 11-serrated cutting edge. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 3 , the utility model provides a technical solution:

[0025] A cutting knife for preventing wood from being damaged comprises a handle 1 and a cutter head 2, wherein the cutter head 2 is coaxially fixedly arranged on the handle 1, and at least two cutting blocks are evenly fixedly arranged on the cutter head 2, and a side cutting surface 3 is arranged on the cutting block, and the angle between the side cutting surface 3 and the cutter head 2 in the radial direction is 14-16°, and a side cutting edge 4 is formed between the side cutting surface 3 and the outer side surface of the cutting block, and the side cutting edge 4 is spirally arranged and the spiral angle is 2-8°. A side back surface 5 is arranged on the cutting block, and a material discharge groove 6 is formed between the side back surface 5 and the side cutting surface 3. Among them, the side cutting edge 4 in the present technology is set to be right-handed, and its spiral angle is 2°, 3°, 4°, 5°, 6°, 7° and 8°, etc. The small spiral angle can realize material discharge during processing. At the same time, at the end of processing, the cutting knife will not cause damage to the wood when retracting the knife, reducing the subsequent repair links. The angles set in the direction of the radius of the side cutting surface 3 and the cutter head 2 (the radius line intersects with the side cutting edge 4 on the side cutting surface 3) are 14°, 15° and 16°, etc. Such angles are convenient for cutting the side wall of the wood.

[0026] In some embodiments, five cutting blocks are evenly arranged on the cutter head 2. The angle between the two side surfaces of the discharge trough 6 is 74-76°. Among them, setting five cutting blocks means setting five side cutting edges 4 and five serrated cutting edges 11, which can not only improve the processing efficiency, but also improve the service life of the cutting knife, and also make the wood processing smoother and avoid secondary chipping. The angle between the two side surfaces of the discharge trough 6 is set to 74°, 75°, 76°, etc.

[0027] In some embodiments, the cutting block is provided with a first edge face 7 and a second edge face 8, wherein the first edge face 7 is provided between the side cutting surface 3 and the second edge face 8, and the second edge face 8 is provided between the first edge face 7 and the side back surface 5. The first edge face 7 and the second edge face 8 will not contact the side wall of the wood, and the first edge face 7 and the second edge face 8 are provided so that the side cutting edge 4 can better cut the wood and reduce friction, and the angle between the first edge face 7 and the tangent at the cutting edge 4 is 15°, and the angle between the second edge face 8 and the tangent at the cutting edge 4 is 35°.

[0028] In some embodiments, the end of the cutting block is provided with an end cutting surface 9 and an end back surface 10. The end cutting surface 9 is provided with a serrated cutting edge 11 and one side is connected to the end back surface 10. One side of the end back surface 10 is connected to the side back surface 5. The end cutting surface 9 is inclined toward the end back surface 10 and the inclination angle is 19 to 21 degrees. Among them, the serrated cutting edge 11 on the end cutting surface 9 is divided into two serrated segments, and the two serrated segments can effectively cut the wood. The inclination angle of the end cutting surface 9 is the angle between the end cutting surface 9 and the end surface of the cutter head 2. The end back surface 10 is also inclined, and its inclination angle is greater than 21 degrees. The end back surface 10 cooperates with another end cutting surface 9 to form a part of the serrated cutting edge 11, so the inclination angle of the end back surface 10 is larger, and the inclination angle of the end back surface 10 is also between 21 and 45 degrees.

[0029] In some embodiments, the intersection of the serrated cutting edge 11 and the side cutting edge 4 is 0.4-0.6 mm higher than the center point of the cutter head 2. The center point of the cutter head 2 in the present technology is concave inwards, and in the process of grooving or punching wood, the edge part is cut first, and then the middle part is cut.

[0030] In some embodiments, the diameter of the side cutting edge 4 is 7.95-8.05 mm. The diameter of the side back surface 5 is 4.0-5.0 mm. In the design, the diameter of the side cutting edge 4 is designed to be 7.95 mm, 8.0 mm, 8.05 mm, etc., and the diameter of the side back surface 5 is designed to be 4.0, 4.5 mm, 5.0 mm, etc.

[0031] In the description of the present invention, it should be understood that the terms "coaxial", "upper", "one side", "inside", "front", "center", "two ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation", "hinge" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0033] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A cutting knife for preventing wood from being damaged, characterized in that: The invention comprises a knife handle (1) and a knife head (2), wherein the knife head (2) is coaxially fixedly arranged on the knife handle (1), at least two cutting blocks are evenly fixedly arranged on the knife head (2), and a side cutting surface (3) is arranged on the cutting block, and the angle between the side cutting surface (3) and the knife head (2) in the radial direction is 14 to 16 degrees, and a side cutting edge (4) is formed between the side cutting surface (3) and the outer side surface of the cutting block, and the side cutting edge (4) is arranged in a spiral shape and the spiral angle is 2 to 8 degrees.

2. A cutting knife for preventing wood from being damaged according to claim 1, characterized in that: The cutter head (2) is evenly provided with five cutting blocks.

3. A cutting knife for preventing wood from being damaged according to claim 2, characterized in that: The cutting block is provided with a side back surface (5), and a discharge groove (6) is formed between the side back surface (5) and the side cutting surface (3).

4. A cutting knife for preventing wood from being damaged according to claim 3, characterized in that: The angle between the side surfaces of the discharge trough (6) is 74-76°.

5. A cutting knife for preventing wood from being damaged according to claim 3 or 4, characterized in that: The cutting block is provided with a first edge face (7) and a second edge face (8), wherein the first edge face (7) is arranged between the side cutting face (3) and the second edge face (8), and the second edge face (8) is arranged between the first edge face (7) and the side back face (5).

6. A cutting knife for preventing wood from being damaged according to claim 3 or 4, characterized in that: The end of the cutting block is provided with an end cutting surface (9) and an end back surface (10); the end cutting surface (9) is provided with a sawtooth cutting edge (11) and one side edge is connected to the end back surface (10); one side edge of the end back surface (10) is connected to the side back surface (5).

7. A cutting knife for preventing wood from being damaged according to claim 6, characterized in that: The end cutting surface (9) is inclined toward the end back surface (10) and the inclination angle is 19 to 21 degrees.

8. The cutting knife for preventing wood from being damaged according to claim 6, characterized in that: The intersection point between the sawtooth cutting edge (11) and the side cutting edge (4) is 0.4 to 0.6 mm higher than the center point of the cutter head (2).

9. A cutting knife for preventing wood from being damaged according to any one of claims 1 to 4, characterized in that: The diameter of the side cutting edge (4) is 7.95-8.05 mm.

10. A cutting knife for preventing wood from being damaged according to claim 3 or 4, characterized in that: The diameter of the side and back surfaces (5) is 4.0-5.0 mm.

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