Milling cutter

Abstract

The utility model belongs to the technical field of milling cutters, and particularly relates to a milling cutter which comprises a cutter body part and a cutter handle part, the cutter handle part is used for being connected with a machine tool, the cutter body part is connected with the cutter handle part, a plurality of cutter tooth rows are arranged on the cutter body part, each cutter tooth row comprises a connecting part and a plurality of cutter teeth, and the connecting parts are spirally arranged on the periphery of the cutter body part. The rotating directions of all the connecting parts are consistent, all the cutter teeth in the same cutter tooth row are arranged on the connecting parts at intervals in the rotating direction of the connecting parts of the cutter tooth row, the sides, facing the connecting parts, of the cutter teeth are connected with the connecting parts, and the sides, back to the connecting parts, of the cutter teeth are provided with inner side blade edges located on the inner sides of the rotating directions of the connecting parts and far side blade edges located on the sides away from the cutter handle part. All the cutter teeth in the same cutter tooth row can be divided into first cutter teeth and second cutter teeth, the inner side edge of each first cutter tooth is a main cutting edge, and the far side edge of each second cutter tooth is a main cutting edge. Serious burrs of product orifices can be avoided, and the milling effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of milling cutters, in particular to a milling cutter. Background Art

[0002] A milling cutter is a tool used to mill workpieces and is widely used in construction, machining, auto repair, and home maintenance.

[0003] An existing milling cutter includes a shank portion and a cutter body portion, wherein the cutter body portion is connected to the shank portion. The cutter body portion is provided with multiple rows of cutter teeth, each row of cutter teeth being arranged at intervals on the outer periphery of the cutter body portion. Each row of cutter teeth is arranged spirally on the cutter body portion, and each row of cutter teeth has the same rotation direction. The shank portion is used to be connected to a machine tool, and the machine tool drives the shank portion to rotate, so that the shank portion drives the cutter body portion to rotate, thereby causing the cutter teeth to perform milling operations on the product.

[0004] However, when milling products, existing milling cutters easily cause serious burrs on the product openings, resulting in poor milling effects. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a milling cutter for the problem that when existing milling cutters are milling products, serious burrs are easily generated on the product openings, resulting in poor milling effect.

[0006] To solve the above technical problems, an embodiment of the present utility model provides a milling cutter, comprising a cutter body and a shank, wherein the shank is used to be connected to a machine tool, the cutter body is connected to the shank, the cutter body is provided with a plurality of tooth rows, the tooth rows comprising a connecting portion and a plurality of teeth, the plurality of connecting portions being spirally arranged on the outer circumference of the cutter body, the rotation directions of all the connecting portions being consistent, and all the teeth in the same tooth row being arranged on the connecting portion at intervals along the rotation direction of the connecting portion of the tooth row;

[0007] The side of the blade teeth facing the connecting portion is connected to the connecting portion, and the side of the blade teeth facing away from the connecting portion is provided with an inner cutting edge located on the inner side of the connecting portion and a distal cutting edge located away from the handle portion;

[0008] All the teeth in the same tooth row can be divided into first teeth and second teeth, wherein the inner edge of the first teeth is the main cutting edge, and the distal edge of the second teeth is the main cutting edge.

[0009] Optionally, in the same row of teeth, the first teeth and the second teeth are arranged alternately.

[0010] Optionally, each of the tooth rows is provided with 6-8 first teeth.

[0011] Optionally, the interval between two adjacent rows of teeth is a first chip removal groove, and the groove widths of the first chip removal grooves are consistent.

[0012] Optionally, the cutter body is circular, and the width of the first chip removal groove is 24%-30% of the diameter of the cutter body.

[0013] Optionally, in the same row of teeth, the interval between two adjacent teeth is a second chip removal groove, and the width of each of the second chip removal grooves is consistent.

[0014] Optionally, the width of the second chip removal groove is 12%-14% of the diameter of the tool body.

[0015] Optionally, the vertical distance between the main cutting edge of the first tooth and the bottom of the second chip flute is L1, and the diameter of the cutter body is d, then:

[0016] L1=d*12.5%±0.02mm.

[0017] Optionally, the vertical distance between the main cutting edge of the second tooth and the bottom of the second chip flute is L2, then:

[0018] L2=d *9%±0.02mm.

[0019] Optionally, the inclination angle of the main cutting edge is 1.5°-2.5°.

[0020] According to the milling cutter of the embodiment of the present invention, a plurality of tooth rows are spirally arranged at intervals on the outer periphery of the conductor part, and the plurality of teeth on each tooth row are provided with a first tooth with an inner cutting edge located on the inner side of the connecting part as the main cutting edge and a second tooth with a distal cutting edge located on the side away from the shank part as the main cutting edge. Compared with the prior art, when the milling cutter rotates one circle, the first tooth and the second tooth can perform two milling operations on the workpiece from different directions, which can avoid serious burrs on the product hole and improve the milling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a milling cutter provided in one embodiment of the present utility model;

[0022] Figure 2 for Figure 1 Enlarged schematic diagram of point A in the middle.

[0023] The figures in the specification are as follows: 1. Handle portion; 2. First transition portion; 3. Second transition portion; 4. Body portion; 5. Tooth row; 6. First chip groove; 7. Connecting portion; 8. First tooth; 9. Second tooth; 10. Outer cutting edge; 11. Inner cutting edge; 12. Proximal cutting edge; 13. Distal cutting edge; 14. Second chip groove; 15. Tooth. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a milling cutter, comprising a cutter body 4 and a shank 1, wherein the shank 1 is used to be connected to a machine tool, the cutter body 4 is connected to the shank 1, and a plurality of tooth rows 5 are provided on the cutter body 4, wherein the tooth row 5 comprises a connecting portion 7 and a plurality of teeth 15, wherein the plurality of connecting portions 7 are spirally arranged on the outer periphery of the cutter body 4, and the rotation direction of all the connecting portions 7 is consistent, and all the teeth 15 in the same tooth row 5 are along the rotation direction of the connecting portion 7 of the tooth row 5. The teeth 15 are arranged at intervals on the connecting portion 7, and are connected to the connecting portion 7 on the side facing the connecting portion 7. The side of the teeth 15 facing away from the connecting portion 7 is provided with an inner cutting edge 11 located on the inner side of the connecting portion 7 and a distal cutting edge 13 located on the side away from the shank portion 1. All the teeth 15 in the same tooth row 5 can be divided into first teeth 8 and second teeth 9, the inner cutting edge 11 of the first tooth 8 is the main cutting edge, and the distal cutting edge 13 of the second tooth 9 is the main cutting edge.

[0026] Specifically, as shown in Figure 2, the side of the tooth 15 facing away from the connecting portion 7 is provided with four cutting edges, and the four cutting edges are divided into an inner cutting edge 11 located on the inner side of the connecting portion 7, an outer cutting edge 10 located on the outer side of the connecting portion 7, a proximal cutting edge 12 located on the side close to the shank portion 1, and a distal cutting edge 13 located on the side away from the shank portion 1. In any row of teeth 5, the inner cutting edge 11 of the first tooth 8 serves as the main cutting edge, and the distal cutting edge 13 of the second tooth 9 serves as the main cutting edge. When the milling cutter rotates one circle, the first tooth 8 and the second tooth 9 can perform two milling operations on the workpiece from different directions, which can avoid serious burrs on the product hole and improve the milling effect.

[0027] In one embodiment, in the same row of teeth 5 , the first teeth 8 and the second teeth 9 are arranged alternately.

[0028] Specifically, the first teeth 8 and the second teeth 9 are arranged alternately, that is, in the same tooth row 5, any two adjacent teeth 15 include a first tooth 8 and a second tooth 9. The first teeth 8 and the second teeth 9 are arranged adjacent to each other. After the first teeth 8 mill the workpiece, the second teeth 9 can immediately perform a second milling on the workpiece, and the burrs generated after the first milling can be removed in time.

[0029] In one embodiment, each of the tooth rows 5 is provided with 6-8 first teeth 8. Specifically, each of the tooth rows 5 is provided with 6-8 first teeth 8, the first teeth 8 and the second teeth 9 are arranged alternately, and each of the tooth rows 5 is provided with 8-11 second teeth 9.

[0030] In one embodiment, the interval between two adjacent tooth rows 5 is a first chip flute 6, and each of the first chip flutes 6 has a uniform width. The interval between two adjacent tooth rows 5 is a first chip flute 6, and the first chip flute 6 is specifically the vertical distance between the outer edge 10 of the tooth 15 in one of the two adjacent tooth rows 5 and the inner edge 11 of the tooth 15 in the other tooth row 5. The uniform width of each first chip flute 6 facilitates manufacturing and enables more uniform milling of the workpiece.

[0031] In one embodiment, the cutter body 4 is circular, and the width of the first chip removal groove 6 is 24%-30% of the diameter of the cutter body 4 .

[0032] Specifically, the milling cutter also includes a connected first transition portion 2 and a second transition portion 3, the first transition portion 2 and the second transition portion 3 are connected between the shank portion 1 and the cutter body portion 4, the shank portion 1 and the cutter body portion 4 are both circular, the diameter of the shank portion 1 is larger than the diameter of the cutter body portion 4, the first transition portion 2 and the second transition portion 3 are both frustums, the first transition portion 2 is connected to the shank portion 1, and the second transition portion 3 is connected to the cutter body portion 4, which can increase the length of the milling cutter, so that the milling cutter can mill out a hole structure with a longer length, and can increase the range of use of the milling cutter.

[0033] The width of the first chip flute 6 is 24%-30% of the diameter of the cutter body 4 , which can improve the milling effect of the milling cutter.

[0034] In one embodiment, in the same tooth row 5 , the interval between two adjacent teeth 15 is a second chip removal groove 14 , and the widths of the second chip removal grooves 14 are the same.

[0035] The interval between two teeth 15 is the second chip groove 14. The second chip groove 14 is specifically the vertical distance between two adjacent teeth 15 in the same row, the distal edge 13 of one tooth 15 and the proximal edge 12 of the other tooth 15. The groove width of each second chip groove 14 is consistent, which facilitates the manufacture and forming of the teeth 15.

[0036] In one embodiment, the width of the second chip removal groove 14 is 12%-14% of the diameter of the cutter body 4 , which can further improve the milling effect of the milling cutter.

[0037] In one embodiment, the vertical distance between the main cutting edge of the first tooth 8 and the bottom of the second chip flute 14 is L1, and the diameter of the cutter body 4 is d, then: L1 = d*12.5%±0.02 mm.

[0038] Specifically, the vertical distance between the main cutting edge of the first tooth 8 (i.e., the inner edge 11 of the first tooth 8) and the bottom of the second chip flute 14 is L1, and the diameter of the cutter body 4 is d, L1 = d*12.5%±0.02 mm. This can improve the milling effect of the first tooth 8.

[0039] In one embodiment, a vertical distance between the main cutting edge of the second tooth 9 and the bottom of the second chip flute 14 is L2, where L2 = d*9%±0.02 mm.

[0040] Specifically, the vertical distance between the main cutting edge of the second tooth 9 (i.e., the distal edge 13 of the second tooth 9) and the bottom of the second chip flute 14 is L2, where L2 = d*9%±0.02 mm, which can improve the milling effect of the second tooth 9.

[0041] In one embodiment, the inclination angle of the main cutting edge is 1.5°-2.5°. Specifically, the inclination angle is the angle between the extension line of the edge of the main cutting edge and the central axis of the cutter body 4. The angle is 1.5°-2.5°, which can further improve the milling effect of the milling cutter.

[0042] The working principle of the milling cutter of the embodiment of the present invention is as follows: the shank portion 1 is connected to the machine tool, and the machine tool drives the shank portion 1 to drive the cutter body portion 4 to rotate. When the milling cutter rotates one circle, the first cutter tooth 8 and the second cutter tooth 9 perform two milling operations on the workpiece from different directions.

[0043] According to the milling cutter of the embodiment of the present invention, a plurality of tooth rows 5 are spirally arranged at intervals on the outer periphery of the conductor part, and the plurality of teeth 15 on each tooth row 5 are provided with a first tooth 8 which uses the inner cutting edge 11 located on the inner side of the connecting part 7 as the main cutting edge and a second tooth 9 which uses the distal cutting edge 13 located on the side away from the shank part 1 as the main cutting edge. Compared with the prior art, when the milling cutter rotates one circle, the first tooth 8 and the second tooth 9 can perform two milling operations on the workpiece from different directions, which can avoid serious burrs on the product hole and improve the milling effect.

[0044] In other embodiments, the side of the cutting tooth 15 facing away from the connecting portion 7 may be provided with three cutting edges, or more than four cutting edges.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A milling cutter, characterized in that: The present invention comprises a tool body (4) and a tool handle (1), wherein the tool handle (1) is used to be connected to a machine tool, the tool body (4) is connected to the tool handle (1), a plurality of blade tooth rows (5) are provided on the tool body (4), the blade tooth row (5) comprises a connecting portion (7) and a plurality of blade teeth (15), the plurality of connecting portions (7) are spirally arranged on the outer periphery of the tool body (4), the rotation direction of all the connecting portions (7) is consistent, and all the blade teeth (15) in the same blade tooth row (5) are arranged on the connecting portion (7) at intervals along the rotation direction of the connecting portion (7) of the blade tooth row (5); The side of the blade tooth (15) facing the connecting portion (7) is connected to the connecting portion (7), and the side of the blade tooth (15) facing away from the connecting portion (7) is provided with an inner blade edge (11) located on the inner side of the connecting portion (7) and a distal blade edge (13) located on the side away from the handle portion (1); All the teeth (15) in the same tooth row (5) can be divided into first teeth (8) and second teeth (9), the inner edge (11) of the first teeth (8) is the main cutting edge, and the distal edge (13) of the second teeth (9) is the main cutting edge.

2. The milling cutter according to claim 1, characterized in that In the same row of blade teeth (5), the first blade teeth (8) and the second blade teeth (9) are arranged alternately.

3. The milling cutter according to claim 2, characterized in that Each of the blade tooth rows (5) is provided with 6-8 of the first blade teeth (8).

4. The milling cutter according to claim 3, characterized in that The interval between two adjacent rows of teeth (5) is a first chip removal groove (6), and the groove widths of the first chip removal grooves (6) are consistent.

5. The milling cutter according to claim 4, characterized in that The cutter body (4) is circular, and the width of the first chip removal groove (6) is 24%-30% of the diameter of the cutter body (4).

6. The milling cutter according to claim 5, characterized in that In the same row of teeth (5), the interval between two adjacent teeth (15) is a second chip removal groove (14), and the width of each of the second chip removal grooves (14) is the same.

7. The milling cutter according to claim 6, characterized in that The width of the second chip removal groove (14) is 12%-14% of the diameter of the cutter body (4).

8. The milling cutter according to claim 7, characterized in that The vertical distance between the main cutting edge of the first tooth (8) and the bottom of the second chip removal groove (14) is L1, and the diameter of the cutter body (4) is d, then: L1=d*12.5%±0.02mm.

9. The milling cutter according to claim 8, characterized in that The vertical distance between the main cutting edge of the second tooth (9) and the bottom of the second chip groove (14) is L2, then: L2=d *9%±0.02mm.

10. The milling cutter according to claim 9, characterized in that The main cutting edge has an inclination angle of 1.5°-2.5°.

Images