CN216706207U

CN216706207U - Milling cutter

Info

Publication number: CN216706207U
Application number: CN202122379810.0U
Authority: CN
Inventors: 陈耀昆
Original assignee: Dongguan Lianyang Cutting Tools Co ltd
Current assignee: Dongguan Lianyang Cutting Tools Co ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-06-10
Anticipated expiration: 2031-09-29

Abstract

The utility model discloses a tooth milling cutter, which comprises a cutter head, wherein the cutter head comprises four groups of milling cutter edges which are coaxially arranged, each milling cutter edge comprises an outer tooth section and a cutter edge section, and the tooth milling cutter comprises: the outer tooth section is of a continuous arc tooth-shaped structure and comprises a tooth top and a tooth bottom, and the tooth top and the tooth bottom are arranged adjacently in a spaced mode; the outer edge section of the outer tooth section is of a transverse V-shaped structure, and the top of the V-shaped structure is arc-shaped to form a tooth crest; the two sides of the tooth top extend inwards respectively to form a slope; the adjacent crests are connected in a slope manner to form a root; the tooth bottom comprises a first arc surface and a second arc surface, the first arc surface is arranged at the upper end of the tooth bottom, and the second arc surface is arranged at the lower end of the tooth bottom; the outer tooth section and the blade section are arranged adjacently along the vertical direction, and a space is arranged between the outer tooth section and the blade section.

Description

Milling cutter

Technical Field

The utility model relates to the technical field of a tooth milling cutter, in particular to a tooth milling cutter.

Background

Thread machining is a process of machining a part by cutting, turning, milling, grinding and other processes using a tool for making a thread, generally refers to a method of machining a thread on a part using a forming tool or a grinding tool, and mainly includes turning, milling, tapping, threading, grinding, whirling and the like.

When the thread is turned, milled and ground, the transmission chain of the machine tool ensures that the milling cutter accurately and uniformly moves a lead along the axial direction of the part every time the part rotates. During tapping or threading, the tooth milling cutter and the part do relative rotation movement, and the tooth milling cutter is guided by the formed thread groove to do axial movement. At present, after a tooth milling cutter is discharged from an orifice, a tail tooth of the tooth milling cutter is easily damaged by overheating, and burrs are easily generated on parts. The part that processes through the tooth milling cutter still need carry out burring process usually, and has a plurality of drill holes on a part, and in addition, the part structure is narrow and small, and prior art adopts artifical burring usually, wastes time and energy.

Therefore, a new technical solution is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a tooth milling cutter, which has a first arc surface and a second arc surface at the root of an outer tooth section, so that: the external tooth section of the tooth milling cutter is tightly attached to the cutting surface of the part, so that the generation of burrs on the surface of the part is reduced, and the smoothness of the surface of the part is improved; meanwhile, the aluminum alloy part deburring machine is suitable for milling teeth and deburring of an inner hole of an aluminum alloy part with a small thread, the quality and the processing efficiency of the processed part are guaranteed, and the aluminum alloy part deburring machine is simple in structure and easy to produce.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a tooth milling cutter comprising a cutter head, the cutter head comprising four sets of coaxially disposed milling edges, the milling edges comprising an outer tooth section, an edge section, wherein:

the outer tooth section is of a continuous arc tooth-shaped structure and comprises a tooth top and a tooth bottom, and the tooth top and the tooth bottom are arranged adjacently in a spaced mode; the outer edge section of the outer tooth section is of a transverse V-shaped structure, and the top of the V-shaped structure is arc-shaped to form a tooth crest; the two sides of the tooth top extend inwards respectively to form a slope; the adjacent crests are connected in a slope manner to form a root; the tooth bottom comprises a first arc surface and a second arc surface, the first arc surface is arranged at the upper end of the tooth bottom, and the second arc surface is arranged at the lower end of the tooth bottom;

the outer tooth section and the blade section are arranged adjacently along the vertical direction, and a space is arranged between the outer tooth section and the blade section.

Preferably, the blade section is 0.04 to 0.07 mm lower than the crest.

Preferably, the milling edge is a PCD insert.

As a preferred scheme, chip grooves are respectively arranged between adjacent milling cutter edges; the chip grooves comprise clamping grooves positioned between adjacent milling cutter blades and arc grooves extending downwards from the clamping grooves; a first clamping surface is formed at the rear end of the milling blade, a second clamping surface is formed at the front end of the milling blade, a first crack is formed between the first clamping surface and the second clamping surface, and the first crack is of a semi-arc structure; the first clamping surface extends downwards and bends towards one side of the second clamping surface to form an arc edge; form the second crack between arc limit and the second clamping face, the second crack is semicircle arcuation structure, the upper end on arc limit is tangent with the lower extreme of cutting edge section, promptly: the depth from the lower end of the arc groove to the blade section is set from shallow to deep.

As a preferable scheme, the rear cutter face of the milling cutter edge is provided with a first cutting face and a second cutting face; a first included angle is formed between the first tangent plane and the cutting plane, and the first included angle is a front angle; and a second included angle is formed between the second tangent plane and the cutting plane, the second included angle is a rear angle, and the first included angle is smaller than the second included angle.

Preferably, a gap is formed between the first clamping surface at the rear end of the milling cutter blade and the rake surface.

Preferably, the cutting head and the chip grooves are coated with a TiB2 coating.

As a preferred scheme, the tooth milling cutter further comprises a cutter handle, the cutter handle is arranged at the lower end of the cutter head, and the lower end of the cutter handle is of a chamfer round handle structure.

Compared with the prior art, the tooth milling cutter has the obvious advantages and beneficial effects, and particularly, according to the technical scheme, the tooth milling cutter is mainly characterized in that a first arc surface and a second arc surface are arranged at the tooth bottom of the outer tooth section. The tooth milling cutter cuts the part and mills tooth man-hour, and outer tooth section rubs with the part, and the tooth bottom sets up first cambered surface, second cambered surface for: the external tooth section of the milling cutter is tightly attached to the cutting surface of the part, so that the burrs on the surface of the part are reduced, and the smoothness of the surface of the part is improved.

Secondly, the outer tooth section that mills tooth sword adjacent setting from top to bottom is provided with the interval between cutting edge section for: the outer tooth section and the cutting edge section are mutually separated, so that the heat dissipation capacity of the milling cutting edge is improved, the overheating deformation is prevented, and the effective working time of the milling cutter is prolonged. The milling cutter is suitable for milling teeth and deburring of inner holes of aluminum alloy parts with small threads, ensures the quality and the processing efficiency of processed parts, and is simple in structure and easy to produce.

To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a side block diagram of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a milling edge of an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of a milling edge of an embodiment of the present invention;

FIG. 4 is an enlarged partial view of an outer tooth segment in accordance with an embodiment of the present invention.

Description of the figures:

10. external tooth segment 11, crest

12. Root 121, first cambered surface

122. Second cambered surface 20, blade section

21. Flank surface 211, first tangent plane

212. Second cutting surface 22, rake surface

30. A first clamping surface 40 and a second clamping surface

50. Chip groove 51, clamp groove

511. First crack 52, arc

521. Second nip 60, pitch.

Detailed Description

In the description of the present invention, it should be noted that, for the orientation words, such as the terms "upper", "lower", "front", "rear", "left", "right", etc., indicating the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and operation, and should not be construed as limiting the specific scope of the present invention.

Referring to fig. 1 to 4, specific structures of the embodiments of the present invention are shown.

The utility model provides a tooth milling cutter, includes the tool bit, the tool bit includes four sets of coaxial arrangement's milling cutter edge, wherein, milling cutter edge includes outer tooth section 10, cutting edge section 20. Preferably, the milling cutter edge is a PCD blade, and the PCD blade has the characteristics of high hardness, high compressive strength, good thermal conductivity, good wear resistance and the like. The milling cutter edge is a PCD blade, so that: when the milling cutter is used for processing the inner hole of the aluminum alloy part, high processing precision and processing efficiency are obtained in high-speed cutting. Meanwhile, the PCD blade is adopted by the milling blade edge, so that the defects that the milling cutter is easy to wear and the like can be effectively avoided.

Fig. 1 shows a side view of a tooth milling cutter. Outer tooth section 10 and cutting edge section 20 are adjacent setting from top to bottom, and, be provided with interval 60 between outer tooth section 10 lower extreme and the cutting edge section 20 upper end for: the outer tooth section 10 and the cutting edge section 20 are mutually separated, so that the heat dissipation capacity of the milling cutting edge is improved, the overheating deformation is prevented, and the effective working time of the tooth milling cutter is prolonged. Preferably, the blade section 20 is lower than the crest 11, typically 0.04 to 0.07 mm, preferably 0.05 mm.

Fig. 2 shows a sectional view of the milling edge of the tooth milling cutter. The cutter head comprises four groups of milling cutter edges which are coaxially arranged, and chip grooves 50 are respectively arranged between the adjacent milling cutter edges. The chip groove 50 includes a clamping groove 51 between adjacent milling cutter blades, and a circular arc groove 52 extending downward from the clamping groove 51. The rear end of the milling blade forms a first clamping surface 30, the front end of the milling blade forms a second clamping surface 40, a first crack 511 is formed between the first clamping surface 30 and the second clamping surface 40, the first crack 511 is of a semi-arc structure, and the curvature radius of the first crack 511 is 0.5 mm. The first clamping surface 30 extends downward and bends toward one side of the second clamping surface 40 to form an arc edge. A second gap 521 is formed between the arc edge and the second clamping surface 40, the second gap 521 is a semi-arc structure, and the curvature radius of the second gap 521 is 0.5 mm. The upper end of the arc edge is tangent to the lower end of the blade section 20, namely: the depth from the lower end of the arc groove 52 to the blade section 20 is set from shallow to deep, specifically, the groove surface of the arc groove 52 is contracted toward the side close to the second clamping surface 40.

The tooth milling cutter cuts a part, generated chips enter the chip discharge grooves 50 through the outer tooth section 10, when the tooth milling cutter rotates around the central shaft at a high speed, simultaneously, the chip discharge grooves 50 on the tooth milling cutter rotate around the central shaft of the tooth milling cutter at a high speed respectively, and the chips are discharged along the clamping grooves 51 and the arc grooves 52 to prevent splashing and damage. Meanwhile, the first crack 511 of the crack 51 and the second crack 521 of the arc groove 52 are semi-arc structures, so that: when the tooth milling cutter is used for cutting, chips can be smoothly removed, the chips are prevented from being attached to the edge of the milling cutter, and the cutting production efficiency is further improved.

In addition, the cutting head and the chip grooves 50 are coated with TiB2 coatings, and the TiB2 coatings have the characteristics of high wear resistance, oxidation resistance and high stability. In the process of cutting and polishing the aluminum alloy parts by the milling cutter at a high speed, the external tooth section 10 of the milling cutter tightly polishes the parts, the blade section 20 deburs the parts, and the chips enter the chip discharge groove 50 through the external tooth section 10 and repeatedly rub the chip discharge groove 50, so that a TiB2 coating is arranged on the milling cutter to protect the wear resistance and stability of the milling cutter. Meanwhile, the TiB2 coating can enable the surfaces of the cutter head and the chip removal groove 50 of the tooth milling cutter to be smooth, and the tooth milling cutter is prevented from being adhered to parts in the process of cutting and polishing aluminum alloy parts by the tooth milling cutter at high speed, so that the generation of accumulated chips is reduced.

Fig. 3 shows a partially enlarged view of the milling edge of the milling cutter. The cutter head comprises four groups of milling cutter edges which are coaxially arranged, and the cutter head forms a cross boomerang structure. The flank 21 of the milling cutter is provided with a first tangent plane 211 and a second tangent plane 212. A first included angle is formed between the first tangent plane 211 and the cutting plane, the first included angle is a front angle, the first tangent plane 211 is a guide tangent plane, the toughness and sharpness of the blade section 20 are increased, the cutting deformation of the tooth milling cutter is reduced, and the cutting consumption is reduced; simultaneously, the angle of increase first contained angle helps reducing the work hardening, inhibits the accumulational production of piece, improves the processing surface quality, reduces cutting temperature, and then promotes the cutting performance of milling cutter's cutting edge section 20. Preferably, the width of the first cut surface 211 is 0.4 mm. Thus, preferably, the first angle is 12 °, such that: the cutting edge section 20 of the tooth milling cutter has a larger rake angle, so that the tooth milling cutter can conveniently finish the aluminum alloy part.

A second included angle is formed between the second tangent plane 212 and the cutting plane, and the second included angle is a back angle. The milling cutter is used for machining inner hole milling teeth of aluminum alloy parts and deburring the parts, selects a larger back angle, and enables a cutting edge to be sharp with less friction, thereby being beneficial to improving the quality of the surface of the machined parts. Preferably, the second angle is 25 °, such that: the back angle is increased, and the friction between the back tool surface 21 of the tooth milling cutter and the part is reduced, so that the roughness of the surface of the part is reduced; meanwhile, the abrasion of the rear cutter face 21 of the tooth milling cutter is reduced.

Further, the width of the rake face 22 of the milling cutter blade is 3 mm, and the milling cutter blade rear end formation first clamping face 30 and the rake face 22 form a gap therebetween, preferably the gap is 1 mm, specifically, the width between the milling cutter blade rear end first clamping face 30 and the milling cutter blade front face 22 outer edge is 4 mm, and the width between the milling cutter blade front face 22 inner edge and the milling cutter blade rear end first clamping face 30 is 1 mm. When the tooth milling cutter is used for cutting, the tooth milling cutter rotates around the central shaft at a high speed, and simultaneously, the rake surface 22 of the tooth milling cutter rubs against the part, and the generated chips slide to the clamping groove 51 from the rake surface 22 of the second clamping surface 40, slide to the first clamping surface 30 from the clamping groove 51, and are discharged through the arc groove 52. Set up the clearance between first clamping face 30 and rake face 22, guaranteed that the tooth milling cutter carries out the cutting when milling the tooth, the chip removal is smooth and easy, and then avoids the piece to bond and form the long-pending knot on rake face 22.

Fig. 4 shows a partial enlarged view of the external tooth segment. Outer tooth section 10 is continuous arc profile of tooth structure, outer tooth section 10 includes crest 11 and root 12, and, crest 11 and root 12 are adjacent setting of interval formula. The outer edge section of the outer tooth section 10 is of a transverse V-shaped structure, the top of the V-shaped structure is arc-shaped to form a crest 11, and the curvature radius of the crest 11 is 0.08 mm. Both sides of the crest 11 extend inwards to form a slope. The slope between adjacent crests 11 connects to form roots 12. The root 12 comprises a first arc surface 121 and a second arc surface 122, the first arc surface 121 is arranged at the upper end of the root 12, and the second arc surface 122 is arranged at the lower end of the root 12. When the tooth milling cutter carries out cutting tooth milling machining to the part, outer tooth section 10 rubs with the part, and tooth bottom 12 sets up first cambered surface 121, second cambered surface 122 for: the external tooth section 10 of the milling cutter is tightly attached to the cutting surface of the part, so that the generation of burrs on the surface of the part is reduced, and the smoothness of the surface of the part is improved.

Preferably, the height difference between the crest 11 and the root 12 is 0.858 mm, the radius of curvature of the first arc 121 is 0.25 mm, and the radius of curvature of the second arc 122 is 0.23 mm.

Preferably, the outer diameter of the outer tooth segment 10 and the outer diameter of the blade segment 20 are arranged equally long, so that: the tooth milling cutter can be used for milling the inner hole of a part and deburring the part.

The tooth milling cutter further comprises a cutter handle, the cutter handle is arranged at the lower end of the cutter head, and the cutter handle is made of 10K alloy. And the lower end of the cutter handle adopts a chamfer round handle structure, so that the requirement on a machine tool is low, the use requirements of most machine tools can be met, the compatibility is better, and the use is convenient. The shank is such that: the tooth milling cutter can be arranged on a machine tool, the anti-seismic performance is enhanced, the cutting speed is improved, and the tooth milling cutter is clamped more tightly and is not easy to slip.

In order to more clearly illustrate the structural features and the efficacy of the present invention, the following detailed description is provided in conjunction with the working process of a tooth milling cutter: when the tooth milling cutter is used, the fixedly installed position is firstly found through the positioning groove, then the cutter handle is fixedly connected with a rotating machine shaft of a lathe, after a part is clamped, the inner hole of the aluminum alloy part is subjected to cutting, tooth milling and deburring work through the cutter head, and chips generated by cutting are discharged along the chip discharge groove 50. And the cutter head of the milling cutter extends into an inner hole of the aluminum alloy part, and the milling cutter rotates around the central shaft for one circle to complete the tapping milling and cutting process. Specifically, in the present embodiment, the female screw hole of the aluminum alloy part needs 6 teeth, and the external tooth section 10 of the milling cutter is provided with 5 external teeth.

The design of the utility model is mainly characterized in that the tooth milling cutter is provided with a first cambered surface and a second cambered surface at the tooth bottom of the outer tooth section. The tooth milling cutter cuts the part and mills tooth man-hour, and outer tooth section rubs with the part, and the tooth bottom sets up first cambered surface, second cambered surface for: the external tooth section of the milling cutter is tightly attached to the cutting surface of the part, so that the burrs on the surface of the part are reduced, and the smoothness of the surface of the part is improved.

Claims

1. A tooth milling cutter is characterized in that: including the tool bit, the tool bit includes the milling cutter sword of four coaxial settings of group, the milling cutter sword includes outer tooth section, sword section, wherein:

the outer tooth section is of a continuous arc tooth-shaped structure and comprises a tooth top and a tooth bottom, and the tooth top and the tooth bottom are arranged adjacently in a spaced mode; the outer edge section of the outer tooth section is of a transverse V-shaped structure, and the top of the V-shaped structure is arc-shaped to form a tooth crest; the two sides of the tooth top extend inwards respectively to form a slope; the adjacent tooth tops are connected in a slope manner to form a tooth bottom; the tooth bottom comprises a first arc surface and a second arc surface, the first arc surface is arranged at the upper end of the tooth bottom, and the second arc surface is arranged at the lower end of the tooth bottom;

2. The tooth milling cutter as recited in claim 1, wherein: the blade section is 0.04-0.07 mm lower than the crest.

3. The tooth milling cutter as claimed in claim 1, wherein: the milling blade is a PCD blade.

4. The tooth milling cutter as claimed in claim 1, wherein: chip grooves are respectively arranged between adjacent milling cutter blades; the chip groove comprises a clamping groove positioned between adjacent milling cutter edges and an arc groove extending downwards from the clamping groove; a first clamping surface is formed at the rear end of the milling blade, a second clamping surface is formed at the front end of the milling blade, a first crack is formed between the first clamping surface and the second clamping surface, and the first crack is of a semi-arc structure; the first clamping surface extends downwards and bends towards one side of the second clamping surface to form an arc edge; the second crack is formed between the arc edge and the second clamping face and is of a semicircular arc structure, the upper end of the arc edge is tangent to the lower end of the blade section, and the depth from the lower end of the arc groove to the blade section is set from shallow to deep.

5. The dental milling cutter as set forth in claim 4, wherein: the rear cutter face of the milling cutter edge is provided with a first tangent plane and a second tangent plane; a first included angle is formed between the first tangent plane and the cutting plane, and the first included angle is a front angle; and a second included angle is formed between the second tangent plane and the cutting plane, the second included angle is a rear angle, and the first included angle is smaller than the second included angle.

6. The dental milling cutter as set forth in claim 4, wherein: a gap is arranged between the first clamping surface at the rear end of the milling cutter edge and the front cutter surface.

7. The dental milling cutter as set forth in claim 4, wherein: the tool bit and the chip grooves are coated with TiB2 coatings.

8. The tooth milling cutter as claimed in any one of claims 1 to 7, wherein: the tooth milling cutter further comprises a cutter handle, the cutter handle is arranged at the lower end of the cutter head, and the lower end of the cutter handle is of a chamfer round handle structure.