Three-fluted helical v-shaped tip cutter

Abstract

The utility model discloses three spiral V type bevel tip knives belong to processing tool field. Three spiral V type bevel tip knives, include: handle, its lower surface is first installation surface, is equipped with first installation portion on first installation surface, V type cutter head, V type cutter head includes the first cutter head portion of being cylindrical, the upper surface of first cutter head portion is second installation surface, is equipped with second installation portion on second installation surface, the below integral molding of first cutter head portion is provided with second cutter head portion, and the surface distribution of second cutter head portion has the first blade, second blade, third blade of being circumferentially distributed. The utility model adopts the fixed mode of cutter head and handle split type, on one hand, the material cost of handle is reduced significantly, on the other hand, the stability of the handle and V type cutter head welding positioning mode is enhanced significantly, the spiral three blades of mutual 120 degree distribution, the spiral three blade cutters make the relief angle support of cutter tip significantly enhanced, not easy to break, and the processing quality and chip removal effect are obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of machining tools, specifically to a three-flute spiral V-shaped beveled tip tool. Background Technology

[0002] Traditional V-shaped cutters are typically one-piece molded double-edged straight blades used in drawing, carving woodblock patterns, and other fields. The insufficient back angle support of the double-edged V-shaped cutter tip often leads to tip breakage, and the straight blade shape results in poor chip removal and a tendency for burrs on the cutting surface. Furthermore, the one-piece molding of the cutter head and shank requires the shank to be made of the same material as the cutter head, leading to higher material costs and consequently higher overall tool manufacturing costs. Therefore, there is an urgent need to develop a new type of V-shaped cutter that improves tip life, facilitates chip removal, and reduces manufacturing costs. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a three-bladed spiral V-shaped oblique tip knife.

[0004] The technical solution of this utility model is: a three-bladed spiral V-shaped oblique tip knife, comprising:

[0005] The tool holder has a first mounting surface on its lower surface, and a first mounting part is provided on the first mounting surface;

[0006] V-shaped cutter head, the V-shaped cutter head includes a first cutter head in the shape of a cylinder, the upper surface of the first cutter head is a second mounting surface, and a second mounting part is provided on the second mounting surface;

[0007] A second cutting head is integrally formed below the first cutting head. The second cutting head is in the shape of an inverted cone. The adjacent parts of the first and second cutting heads are circular. The surface of the second cutting head is distributed with a first cutting edge, a second cutting edge, and a third cutting edge in a circular pattern. The spiral angle of the first cutting edge, the second cutting edge, and the third cutting edge is 7-10°, and the blade tip angle formed by the first cutting edge, the second cutting edge, and the third cutting edge is 40-50°.

[0008] Furthermore, the outer diameter of the first mounting surface is smaller than the outer diameter of the second mounting surface, and the first mounting surface is in contact with the second mounting surface.

[0009] Furthermore, the first mounting part is a groove, and the second mounting part is a positioning block adapted to the groove.

[0010] Furthermore, the first mounting surface and the second mounting surface are fixedly connected by welding.

[0011] Furthermore, the handle is made of 40CR steel, and the V-shaped blade is made of tungsten carbide alloy.

[0012] Furthermore, the helix angles of the first, second, and third cutting edges are 8°.

[0013] Furthermore, the tip angle formed by the first, second, and third cutting edges is 45°.

[0014] Furthermore, the ratio of the height of the first cutter head to the height of the second cutter head is 1:4~5.

[0015] Furthermore, the ratio of the height of the shank to the height of the V-shaped cutter head is 2~3:1.

[0016] Furthermore, the first, second, and third cutting edges are each provided with several chip-breaking grooves.

[0017] The beneficial technical effects of this utility model are:

[0018] 1. This utility model adopts a separate fixing method for the cutter head and the cutter handle. The first mounting part and the second mounting part are pre-positioned and then welded together. On the one hand, this significantly reduces the material cost of the cutter handle. On the other hand, the stability of the welded positioning method between the cutter handle and the V-shaped cutter head is significantly enhanced. Furthermore, since the outer diameter of the first mounting surface is smaller than the outer diameter of the second mounting surface, the cutter handle abuts against the inside of the first cutting head of the V-shaped cutter head. Overall, the positioning stability of the cutter handle and the V-shaped cutter head is better.

[0019] 2. This utility model proposes a first cutting edge, a second cutting edge, and a third cutting edge that are distributed at 120° to each other, which avoids the defect of easy breakage at the tip of a two-edged knife. The three-edged knife with the first, second, and third cutting edges significantly enhances the back angle support of the cutting edge, making it less prone to breakage. By selecting appropriate cutting edge helix angle and cutting edge apex angle, cutting resistance is reduced, cutting accuracy is higher, chip removal is smoother, and the surface finish and smoothness of the wood sample are better.

[0020] 3. This utility model provides a first chip breaker groove, a second chip breaker groove, and a third chip breaker groove at different heights on the cutting surfaces of the first, second, and third cutting edges. By utilizing the staggered chip breaker groove structure, the cutting chips are less likely to form strips, thus avoiding chip entanglement and accumulation, and making the chip removal performance of the tool smoother. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the three-bladed spiral V-shaped oblique tip knife of this utility model. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the knife handle structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the cutter head structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the overall structure of the three-bladed spiral V-shaped oblique tip knife of this utility model. Figure 2 ;

[0025] Figure 5 This is a top view of the blade of this utility model;

[0026] in,

[0027] 1. Tool holder; 11. First mounting surface; 12. First mounting part;

[0028] 2. V-shaped cutter head; 21. First cutter head; 22. Second mounting surface; 23. Second mounting part;

[0029] 24. Second cut to the head;

[0030] 31. First cutting edge; 32. Second cutting edge; 33. Third cutting edge;

[0031] 41. First chip breaker groove; 42. Second chip breaker groove; 43. Third chip breaker groove. Detailed Implementation

[0032] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0033] See Figure 1-5 This utility model discloses a three-bladed spiral V-shaped oblique tip knife. The main structure of the three-bladed spiral V-shaped oblique tip knife includes a handle 1 and a V-shaped blade head 2, which are connected separately and in a fixed manner.

[0034] The lower surface of the handle 1 is a first mounting surface 11, and a first mounting portion 12 is provided on the first mounting surface 11. The V-shaped cutter head 2 includes a cylindrical first cutter head 21 and a second cutter head 24 integrally formed with the first cutter head 21. The upper surface of the first cutter head 21 is a second mounting surface 22, and a second mounting portion 23 is provided on the second mounting surface 22. The outer diameter of the first mounting surface 11 is smaller than the outer diameter of the second mounting surface 22, and the first mounting surface 11 is in contact with the second mounting surface 22. This utility model adopts a separate fixing method for the cutter head and the handle, which significantly reduces the material cost of the handle. On the other hand, the welding positioning method between the handle and the V-shaped cutter head significantly enhances the stability. Furthermore, since the outer diameter of the first mounting surface 11 is smaller than the outer diameter of the second mounting surface 22, the handle 1 abuts against the interior of the first cutter head 21 of the V-shaped cutter head, resulting in better overall positioning stability between the handle 1 and the V-shaped cutter head 2.

[0035] In this specific embodiment, the first mounting part 12 is selected as a groove, and the second mounting part 23 is selected as a positioning block. After the positioning block is inserted into the groove, the first mounting surface 11 and the second mounting surface 22 come into contact. At this time, the first mounting surface 11 and the second mounting surface 22 are fixedly connected by welding. This utility model adopts a separate fixing method for the blade head and the handle, which significantly reduces the material cost of the handle. On the other hand, the stability of the welded positioning method between the handle and the V-shaped blade head is significantly enhanced. Furthermore, since the outer diameter of the first mounting surface 11 is smaller than the outer diameter of the second mounting surface 22, the handle 1 abuts against the inside of the first blade head 21 of the V-shaped blade head, resulting in better overall positioning stability between the handle 1 and the V-shaped blade head 2.

[0036] For more details, see Figure 4-5 Regarding the layout of the V-shaped cutter head 2, the second cutter head 24, which is transitioned to the first cutter head 21, is in the shape of an inverted cone. The adjacent parts of the first cutter head 21 and the second cutter head 24 are circular. The surface of the second cutter head 24 is distributed with a first cutting edge 31, a second cutting edge 32, and a third cutting edge 33 in a circular arrangement. The adjacent angles between the first cutting edge 31, the second cutting edge 32, and the third cutting edge 33 are 120° to each other. The helix angle of the first cutting edge 31, the second cutting edge 32, and the third cutting edge 33 is 7-10°. The blade tip angle formed by the first cutting edge 31, the second cutting edge 32, and the third cutting edge 33 is 40-50°.

[0037] In this specific embodiment, a first cutting edge 31, a second cutting edge 32, and a third cutting edge 33 distributed at 120° intervals are specifically proposed. This avoids the defect of easy breakage at the tip of a two-edged blade. The three-edged blade with the first cutting edge 31, the second cutting edge 32, and the third cutting edge 33 significantly enhances the back angle support of the blade tip, making it less prone to breakage. Secondly, the helix angle of the first cutting edge, the second cutting edge, and the third cutting edge is preferably 8°. The helix angle structure provides less cutting resistance when the tool cuts materials such as wood. The blade tip with the helix angle does not fuzz when in contact with the cutting material, resulting in a smoother and flatter wood sample. Furthermore, the tip angle of the blade formed by the first cutting edge, the second cutting edge, and the third cutting edge is preferably 45°. The smaller blade tip angle further reduces cutting resistance, and the cutting accuracy is higher, chip removal is smoother, and the surface finish and smoothness of the wood sample are better.

[0038] More specifically, the first cutting edge 31, the second cutting edge 32, and the third cutting edge 33 are respectively provided with a first chip breaking groove 41, a second chip breaking groove 42, and a third chip breaking groove 43 at different heights. By utilizing the staggered chip breaking groove structure, the cutting chips are not easy to form strips, thus avoiding chip entanglement and accumulation, and the chip removal performance of the tool is smoother.

[0039] More specifically, the height ratio of the first cutting head 21 to the second cutting head 24 is 1:4~5, and the height ratio of the shank 1 to the V-shaped cutting head 2 is 2~3:1. In this specific embodiment, the height of the first cutting head 21 is preferably 4mm, and the height of the second cutting head 24 is preferably 18mm. Suitable dimensions for the first and second cutting heads can reduce retraction resistance while meeting cutting force requirements. Furthermore, the shank height is preferably 48mm, and the V-shaped cutting head height is preferably 22mm. Optimal shank and V-shaped cutting head height parameters optimize torque distribution, making it easier for the operator and resulting in a lighter overall tool.

[0040] More specifically, the tool holder 1 is made of 40CR steel, and the V-shaped cutting head is made of tungsten carbide alloy. The tungsten carbide V-shaped cutting head and the 40CR steel tool holder ensure both the excellent cutting performance of the cutting head and the overall structural strength of the tool.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A three blade helical V-shaped skewed tip knife characterized in that, include: The handle (1) has a first mounting surface (11) on its lower surface, and a first mounting part (12) is provided on the first mounting surface; V-shaped cutter head (2), the V-shaped cutter head (2) includes a first cutter head (21) in the shape of a cylinder, the upper surface of the first cutter head is a second mounting surface (22), and a second mounting part (23) is provided on the second mounting surface; A second cutting head (24) is integrally formed below the first cutting head (21). The second cutting head (24) is in the shape of an inverted cone. The adjacent parts of the first cutting head (21) and the second cutting head (24) are circular. The surface of the second cutting head (24) is distributed with a first cutting edge (31), a second cutting edge (32), and a third cutting edge (33) in a circular pattern. The spiral angle of the first cutting edge (31), the second cutting edge (32), and the third cutting edge (33) is (7)-(10)°. The blade tip angle formed by the first cutting edge (31), the second cutting edge (32), and the third cutting edge (33) is 40-50°.

2. The three-bladed spiral V-shaped oblique tip knife according to claim 1, characterized in that, The outer diameter of the first mounting surface (11) is smaller than the outer diameter of the second mounting surface (22), and the first mounting surface (11) is in contact with the second mounting surface (22).

3. The three-bladed spiral V-shaped oblique tip knife according to claim 2, characterized in that, The first mounting part (12) is a groove, and the second mounting part (23) is a positioning block that is adapted to the groove.

4. The three-bladed spiral V-shaped beveled knife according to claim 3, characterized in that, The first mounting surface (11) and the second mounting surface (22) are fixedly connected by welding.

5. The three-bladed spiral V-shaped beveled knife according to claim 1, characterized in that, The handle (1) is made of 40CR steel, and the V-shaped cutting head (2) is made of tungsten carbide alloy.

6. The three-bladed spiral V-shaped beveled knife according to claim 1, characterized in that, The spiral angles of the first cutting edge (31), the second cutting edge (32), and the third cutting edge (33) are all 8°.

7. The three-bladed spiral V-shaped beveled knife according to claim 6, characterized in that, The tip angle formed by the first cutting edge (31), the second cutting edge (32), and the third cutting edge (33) is 45°.

8. The three-bladed spiral V-shaped beveled knife according to claim 1, characterized in that, The ratio of the height of the first cut head (21) to the height of the second cut head (24) is 1:4~5.

9. The three-bladed spiral V-shaped beveled knife according to claim 8, characterized in that, The ratio of the height of the handle (1) to the height of the V-shaped cutter head (2) is 2~3:

1.

10. The three-bladed spiral V-shaped beveled knife according to claim 1, characterized in that, The first cutting edge (31), the second cutting edge (32), and the third cutting edge (33) are respectively provided with several chip breaking grooves on their cutting surfaces.

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