Left-right rotary plunge milling cutter

Abstract

The utility model discloses a left-right rotating plunge milling cutter. The left-right rotating plunge milling cutter comprises a handle part and a milling part, the milling part is connected to one end of the handle part and comprises a left-handed part and a right-handed part, the right-handed part is connected to one end, far away from the handle part, of the left-handed part, the left-handed part is provided with a left-handed circumferential blade, the right-handed part is provided with a right-handed circumferential blade and an end blade, the end blade is connected to one end, far away from the handle part, of the right-handed circumferential blade, and a flat-bottom blade type plane is formed at a tool nose at one end, far away from the handle part, of the right-handed part; and the flat-bottom blade type plane is vertical to the axis of the left-right rotary plunge milling cutter. According to the left-right rotation plunge milling cutter, the flat-bottom blade type plane is arranged at the cutter point, so that the cutting strength of the cutter point of the right rotation part in the radial direction is improved, the condition of cutter point breakage is reduced, and the service life of the cutter is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of tool processing, and in particular to a left-right rotating plunge milling cutter. Background Art

[0002] In the related art, when processing the vent holes of plastic watch cases, left-handed and right-handed peripheral cutting edges arranged front and back and with opposite spiral directions are usually used to suppress the generation of burrs, which can improve the surface processing quality of the product. However, there are also problems such as excessive wear and easy chipping of the cutting edge, especially when milling on non-planar contact surfaces (bevel or curved surfaces), which can easily cause the tip of the tool to chip and cause tool failure, greatly shortening the service life of the tool. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the application proposes a left-right rotation plunge milling cutter, which improves the cutting strength of the right-handed part of the tool tip in the radial direction by setting a flat bottom blade plane at the tool tip, reduces the chipping of the tool tip, and increases the service life.

[0004] The left-handed plunge milling cutter according to the first aspect of the utility model comprises: a shank and a milling part; the milling part is connected to one end of the shank, and comprises a left-handed part and a right-handed part, the right-handed part is connected to the end of the left-handed part away from the shank, the left-handed part is provided with a left-handed circumferential blade, the right-handed part is provided with a right-handed circumferential blade and an end blade, the end blade is connected to the end of the right-handed circumferential blade away from the shank, a flat-bottomed blade plane is formed at the tip of the tool at the end of the right-handed part away from the shank, and the flat-bottomed blade plane is perpendicular to the axis of the left-handed plunge milling cutter.

[0005] The left-handed plunge milling cutter according to the embodiment of the utility model has at least the following beneficial effects: the left-handed plunge milling cutter comprises a shank and a milling part, the milling part comprises a left-handed part and a right-handed part which are sequentially connected to one end of the shank, the left-handed part is provided with a left-handed peripheral blade, and the right-handed part is provided with a right-handed peripheral blade, and burrs can be suppressed by arranging peripheral blades with different spiral directions in the front-to-back directions, the right-handed part is also provided with an end blade connected to one end of the right-handed peripheral blade away from the shank, and a flat-bottomed blade-shaped plane is formed at the tip of the right-handed part away from the shank, the edge of the flat-bottomed blade-shaped plane has an overlapping part with the end blade, and the flat-bottomed blade-shaped plane is perpendicular to the axial center line of the left-handed plunge milling cutter; therefore, by setting the flat-bottomed blade-shaped plane, the cutting strength at the tip of the right-handed part in the radial direction can be improved, thereby reducing the wear on the tip of the tool during milling and reducing the occurrence of tip chipping.

[0006] According to some embodiments of the present invention, the value range of the right-handed peripheral blade diameter D1 is 0.588-0.595 mm, the value range of the left-handed peripheral blade diameter D2 is 0.597-0.602 mm, and the left-handed peripheral blade diameter is 0.004-0.007 mm larger than the right-handed peripheral blade diameter.

[0007] According to some embodiments of the present invention, the width H of the projection of the flat-bottomed blade plane on one end surface of the left-right rotating plunge milling cutter in the radial direction is 0.02-0.035 mm.

[0008] According to some embodiments of the present invention, the rake angle of the right-handed peripheral cutting edge is 16°, and the rake angle of the left-handed peripheral cutting edge is 18°.

[0009] According to some embodiments of the present invention, the back angle of the right-handed peripheral cutting edge is 17°, and the first back angle of the left-handed peripheral cutting edge is 23°.

[0010] According to some embodiments of the utility model, the back angle of the right-handed circumferential blade is an arc back angle, and the back angle of the left-handed circumferential blade is a plane back angle. The left-handed circumferential blade is sequentially formed with a first back angle surface and a second back angle surface for avoiding air, and the second back angle corresponding to the second back angle surface is 52°.

[0011] According to some embodiments of the present invention, the helix angle of the left-handed peripheral cutting edge and the right-handed peripheral cutting edge is 28°.

[0012] According to some embodiments of the present invention, shadows of the left-handed portion and the right-handed portion on the axial cross section have overlapping portions.

[0013] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0015] Figure 1 It is a schematic diagram of the overall structure of one embodiment of the left-right rotation plunge milling cutter of the utility model;

[0016] Figure 2 for Figure 1 A side view of the milling portion of the left-hand and right-hand plunge milling cutter shown in ;

[0017] Figure 3 for Figure 1 A bottom view of the milling portion of the left-hand and right-hand plunge milling cutter shown in ;

[0018] Figure 4 for Figure 1 A schematic structural diagram of a right-handed peripheral cutting edge section of a right-handed portion of a left-handed plunge milling cutter shown in FIG.

[0019] Figure 5 for Figure 1 Schematic diagram of the structure of the left-handed circumferential cutting edge cross section of the left-handed portion of the left-handed plunge milling cutter shown in FIG.

[0020] Reference numerals:

[0021] Shank portion 100 ; milling portion 200 ; left-handed portion 300 ; left-handed peripheral cutting edge 310 ; right-handed portion 400 ; right-handed peripheral cutting edge 410 ; end cutting edge 420 ; flat bottom cutting edge plane 430 . DETAILED DESCRIPTION

[0022] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0023] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 application.

[0024] In the description of this application, "several" means more than one, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0026] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0027] Reference below Figures 1 to 5 A left-right rotation plunge milling cutter according to an embodiment of the utility model is described.

[0028] like Figures 1 to 3As shown, according to the embodiment of the utility model, the left-handed plunge milling cutter includes: a shank 100 and a milling part 200; the milling part 200 is connected to one end of the shank 100, and includes a left-handed part 300 and a right-handed part 400, the right-handed part 400 is connected to the end of the left-handed part 300 away from the shank, the left-handed part 300 is provided with a left-handed circumferential blade 310, the right-handed part 400 is provided with a right-handed circumferential blade 410 and an end blade 420, the end blade 420 is connected to the end of the right-handed circumferential blade 410 away from the shank 100, and a flat-bottomed blade-shaped plane 430 is formed at the tip of the right-handed part 400 away from the shank, and the flat-bottomed blade-shaped plane 430 is perpendicular to the axis of the left-handed plunge milling cutter.

[0029] It can be understood that the left-handed plunge milling cutter includes a shank 100 and a milling part 200, the milling part 200 includes a left-handed part 300 and a right-handed part 400 sequentially connected to one end of the shank 100, the left-handed part 300 is provided with a left-handed peripheral blade 310, and the right-handed part 400 is provided with a right-handed peripheral blade 410, and burrs can be suppressed by arranging peripheral blades with different spiral directions in the front and rear directions, and the right-handed part 400 is also provided with an end blade 420 connected to the end of the right-handed peripheral blade 410 away from the shank 100, and A flat-bottomed blade plane 430 is formed at the tip of the right-handed portion 400 away from the shank 100, the edge of the flat-bottomed blade plane 430 overlaps with the end edge 420, and the flat-bottomed blade plane 430 is perpendicular to the axis of the left-right rotating plunge milling cutter; therefore, by setting the flat-bottomed blade plane 430, the cutting strength in the radial direction at the tip of the right-handed portion 400 can be improved, thereby reducing the wear on the tip during milling and reducing the occurrence of tip chipping.

[0030] It can be understood that the value range of the blade diameter D1 of the right-handed peripheral blade 410 is 0.588-0.595 mm, the value range of the blade diameter D2 of the left-handed peripheral blade 310 is 0.597-0.602 mm, and the blade diameter of the left-handed peripheral blade 310 is 0.004-0.007 mm larger than the blade diameter of the right-handed peripheral blade 410. Figure 2 As shown, in this embodiment, that is, the cutting allowance of the left-handed part 300 is smaller than that of the right-handed part 400, and the cutting allowance of the right-handed part 400 that contacts the product first is larger.

[0031] It is understandable that the width H of the projection of the flat bottom blade plane 430 on one end face of the left-right plunge milling cutter in the radial direction is 0.02-0.035 mm. Figure 3 As shown, in this embodiment, the radial width of the projection of the flat-bottomed blade plane 430 on one end face of the left-handed plunge milling cutter is 0.02~0.035mm, thereby improving the radial strength of the end edge 420 at the tip of the tool and preventing the end edge 420 and the right-handed peripheral edge 410 from chipping at the tip of the tool.

[0032] It can be understood that the rake angle of the right-handed peripheral cutting edge 410 is 16°, and the rake angle of the left-handed peripheral cutting edge 310 is 18°. Figures 4 to 5 As shown, in this embodiment, since the cutting allowance of the right-handed portion 400 is large, the right-handed peripheral blade 410 uses a smaller rake angle a=16°, and the left-handed peripheral blade 310 uses a larger rake angle α=18°, so as to improve the strength and anti-collapse performance of the blade of the right-handed portion 400, and improve the sharpness of the left-handed portion 300 at the rear end, reduce cutting resistance, make cutting easier, and effectively reduce the generation of burrs. The design of using different rake angles at the front and back makes the vibration frequency and cutting force generated during cutting inconsistent, which can effectively avoid the generation of resonance and improve the overall anti-vibration performance of the tool.

[0033] It can be understood that the back angle of the right-handed peripheral cutting edge 410 is 17°, and the first back angle of the left-handed peripheral cutting edge 310 is 23°. Figures 4 to 5 As shown, in this embodiment, the right-handed circumferential cutting edge 410 uses a smaller back angle b=17°, and the left-handed circumferential cutting edge 310 uses a larger first back angle β=23°, thereby reducing the edge chipping caused by the large machining allowance of the front end right-handed portion 400, thereby improving the wear resistance and chipping resistance of the edge.

[0034] It can be understood that the back angle of the right-handed peripheral blade 410 is a circular back angle, and the back angle of the left-handed peripheral blade 310 is a plane back angle. The left-handed peripheral blade 310 is sequentially formed with a first back angle surface and a second back angle surface to avoid air, and the second back angle surface corresponds to a second back angle of 52°. Figures 4 to 5 As shown, in this embodiment, the first back angle corresponding to the first back angle surface of the left-handed circumferential blade 310 is β=23°, and the second back angle surface is γ=52 degrees. The left-handed circumferential blade 310 at the rear end adopts a larger front angle + multi-plane back angle structure to provide sufficient cutting edge sharpness, reduce cutting resistance, make cutting easier, and effectively reduce the generation of burrs.

[0035] It is understood that the helix angle of the left-handed peripheral cutting edge 310 and the right-handed peripheral cutting edge 410 is 28°. Figure 2 As shown, in this embodiment, the helix angle of the left-handed peripheral cutting edge 310 and the helix angle of the right-handed peripheral cutting edge 410 are both 28°, so that the cutting is sharper.

[0036] It is understandable that the shadows of the left-handed portion 300 and the right-handed portion 400 on the axial cross section have overlapping parts. Figure 2 As shown, in this embodiment, by arranging the left-handed portion 300 and the right-handed portion 400 to have overlapping portions on the axial cross section, the ability to suppress burrs is improved, thereby improving the surface processing quality of the product.

[0037] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. Left-right rotation plunge milling cutter, characterized in that: include: handle; The milling part is connected to one end of the shank and includes a left-handed part and a right-handed part. The right-handed part is connected to the end of the left-handed part away from the shank. The left-handed part is provided with a left-handed circumferential blade, and the right-handed part is provided with a right-handed circumferential blade and an end blade. The end blade is connected to the end of the right-handed circumferential blade away from the shank. A flat-bottomed blade plane is formed at the tip of the right-handed part away from the shank, and the flat-bottomed blade plane is perpendicular to the axis of the left-right rotating plunge milling cutter.

2. The left-right rotation plunge milling cutter according to claim 1, characterized in that: The value range of the right-handed circumferential blade diameter is 0.588-0.595 mm, the value range of the left-handed circumferential blade diameter is 0.597-0.602 mm, and the left-handed circumferential blade diameter is 0.004-0.007 mm larger than the right-handed circumferential blade diameter.

3. The left-right rotation plunge milling cutter according to claim 2, characterized in that: The width of the flat-bottomed blade plane projected on one end surface of the left-right rotating plunge milling cutter in the radial direction is 0.02-0.035 mm.

4. The left-hand and right-handed plunge milling cutter according to claim 2, characterized in that: The rake angle of the right-handed circumferential cutting edge is 16°, and the rake angle of the left-handed circumferential cutting edge is 18°.

5. The left-hand and right-handed plunge milling cutter according to claim 4, characterized in that: The back angle of the right-handed circumferential cutting edge is 17°, and the first back angle of the left-handed circumferential cutting edge is 23°.

6. The left-hand and right-handed plunge milling cutter according to claim 5, characterized in that: The back angle of the right-handed circumferential blade is an arc back angle, and the back angle of the left-handed circumferential blade is a plane back angle. The left-handed circumferential blade is sequentially formed with a first back angle surface and a second back angle surface for avoiding air, and the second back angle corresponding to the second back angle surface is 52°.

7. The left-right rotation plunge milling cutter according to claim 1, characterized in that: The helix angle of the left-handed circumferential cutting edge and the right-handed circumferential cutting edge is 28°.

8. The left-right rotation plunge milling cutter according to claim 1, characterized in that: The shadows of the left-handed portion and the right-handed portion on the axial cross section have overlapping portions.

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