Multifunctional tooth milling cutter

Abstract

The utility model discloses a multifunctional tooth milling cutter which sequentially comprises a cutter handle, a chamfering section, a tapping section and a milling section from the cutter handle to a cutter tip. The milling section comprises four spiral blades, and the cutting edges of the spiral blades are distributed in a stepped high-low manner; the tapping section comprises three groups of threaded blades with different screw pitches; the chamfering section comprises a chamfering blade and a deburring blade, the milling section and the tapping section are connected through a first connecting part, the tapping section and the chamfering section are connected through a second connecting part, the machining efficiency is greatly improved through the design of the four-blade milling section and the three-tooth tapping section, the chamfering section synchronously deburs, and subsequent procedures are reduced; the stepped cutting edge and the thread pitch grading design ensure high-precision thread machining, and the machining quality is improved; and the chip groove and the cooling system effectively reduce the abrasion of the cutter, so that the service life of the cutter is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of machining tool, especially to a multifunctional gear milling cutter. BACKGROUND

[0002] In the field of machining, the processing of threaded holes usually needs to go through three processes of milling, tapping and chamfering. These three processes often need to use three different tools to complete each process in the traditional processing process. This method not only leads to low processing efficiency, but also increases the idle time of the machine tool due to frequent tool changing, thereby reducing production efficiency. In addition, frequent tool changing is also prone to positioning errors, affecting processing accuracy, increasing the unqualified rate of workpieces, and leading to rising production costs.

[0003] In view of the above problems, some improvements have been made in the prior art, for example, a multifunctional numerical control tool disclosed in a patent with authorization number CN207447535U includes a hole milling part, a tapping part and a chamfering part, and the design aims to realize the processing of three processes by one tool. However, the milling section of the tool only adopts single blade design, which means that the cutting ability of the tool is weak during milling, leading to low processing efficiency. At the same time, single blade design also makes the chip discharge not smooth, which is easy to accumulate between the tool and the workpiece, further aggravating tool wear and shortening tool life. These factors not only affect the processing quality, but also reduce the production efficiency. SUMMARY

[0004] The purpose of the utility model is to provide a multifunctional gear milling cutter, the design of four-blade milling section and three-tap tapping section greatly improves the processing efficiency, and the chamfering section synchronously deburrs, reducing the subsequent processes.

[0005] TECHNICAL SCHEME

[0006] A multifunctional gear milling cutter sequentially includes a handle, a chamfering section, a tapping section and a milling section from a handle to a tip; the milling section includes four spiral blades, the blade edges of the spiral blades are distributed in a stepped manner; the tapping section includes three groups of thread blades with different pitches; the chamfering section includes chamfering blades and deburring blades, the milling section and the tapping section are connected through a first connecting part, and the tapping section and the chamfering section are connected through a second connecting part.

[0007] Further, the height difference between adjacent blade edges of the spiral blades of the milling section is 0.05mm, and the blade angle is 90°.

[0008] Further, the spiral angle of the spiral blades of the milling section is 30°, and the blade tip has a R0.1mm round corner.

[0009] Further, the pitches of the three groups of thread blades of the tapping section are 1mm, 0.8mm and 0.6mm respectively.

[0010] Further, the chamfering blade of the chamfering section has an inclination angle of 30°, the deburring blade has an inclination angle of 45°, and the interval between the two blades is 0.2 mm.

[0011] Further, the milling tooth cutter further comprises a chip removal groove extending from the front end of the milling section to the chamfering section, and the groove width of the chip removal groove gradually decreases from the milling section to the chamfering section.

[0012] Further, the shank is provided with a cooling liquid channel, the inlet of the cooling liquid channel is arranged at the end of the shank, the outlet is directed to the front of the milling section, and the diameter of the cooling liquid channel is 1 mm.

[0013] Further, the first connecting part and the second connecting part are smooth transition structures.

[0014] Beneficial effects: the design of the four-blade milling section and the three-tooth tapping section greatly improves the machining efficiency, the chamfering section simultaneously deburrs, and the subsequent process is reduced; the stepped blade edge and the pitch grading design ensure high-precision thread machining and improve the machining quality; the chip removal groove and the cooling system effectively reduce the wear of the cutter, thereby prolonging the service life of the cutter. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is the side view of the embodiment of the utility model;

[0016] Fig. 2 is the radial section view of the milling section of the utility model;

[0017] Fig. 3 is the axial section view of the embodiment of the utility model. DETAILED DESCRIPTION

[0018] In order to make the technical scheme of the application clearer, the application will be further described in detail below in combination with the drawings and specific embodiments. EMBODIMENT

[0019] As shown in the drawings, Figs. 1-3 A multifunctional milling tooth cutter sequentially comprises a shank 1, a chamfering section 4, a tapping section 3 and a milling section 2 from the shank to the tip; the milling section 2 comprises four spiral blades 21, the blade edges of the spiral blades 21 are distributed in a stepped manner; the tapping section 3 comprises three groups of thread blades 31 with different pitches; the chamfering section 4 comprises a chamfering blade 41 and a deburring blade 42, the milling section 2 and the tapping section 3 are connected through a first connecting part 51, and the tapping section 3 and the chamfering section 4 are connected through a second connecting part 52. The chamfering blade 41 helps to chamfer, and the deburring blade 42 can simultaneously remove burrs in the machining process, thereby reducing the subsequent process and improving the production efficiency.

[0020] This design can realize layered cutting, reduce single blade cutting load, reduce cutting force fluctuation, and improve machining stability. Layered cutting principle: four edges cut into the material in turn, each edge only bears part of the cutting amount, avoiding tool vibration or tool breakage caused by cutting force concentration.

[0021] In this embodiment, the adjacent edge height difference of the helical edge 21 of the milling section 2 is 0.05mm, and the inter-edge angle is 90°. The edge height difference (0.05mm) realizes segmented breaking of chips, reduces chip winding, and improves chip removal efficiency.

[0022] In this embodiment, the helix angle of the helical edge 21 of the milling section 2 is 30°, and the edge tip has a R0.1mm round corner. The design of the helix angle optimizes the cutting angle, reduces the heat generated during cutting, and reduces the wear of the tool. The design of the edge tip round corner effectively reduces the scraping effect of the tool and prolongs the service life of the tool.

[0023] In this embodiment, the pitch of the three groups of thread edges 31 of the tapping section 3 is 1mm, 0.8mm, and 0.6mm, respectively.

[0024] They are used for coarse thread, medium thread and fine thread processing respectively. Coarse thread (1mm): fast removal of excess, providing a basis for subsequent processing. Medium thread (0.8mm): semi-finish machining, further correcting thread shape. Fine thread (0.6mm): finishing, ensuring thread accuracy and surface quality. Pitch grading principle: by gradually reducing the pitch, reducing the single cutting amount, reducing the cutting force, avoiding thread deformation or tool damage.

[0025] In this embodiment, the four edges of each group of thread edges 31 are asymmetrically distributed (phase angle 85°, 95°, 85°, 95°), forming a self-balancing cutting force field, reducing radial cutting force fluctuation, and improving thread machining accuracy.

[0026] In this embodiment, the chamfer edge 41 of the chamfer section 4 has an inclination angle of 30°, and the deburring edge 42 has an inclination angle of 45°, with a spacing of 0.2mm between the two edges. This design can effectively remove burrs during processing and avoid secondary damage to the processed workpiece, ensuring the accuracy and surface quality of the workpiece.

[0027] In the embodiment, the milling cutter further comprises a chip flute 6 extending from the front end of the milling section 2 to the chamfer section 4, and the width of the chip flute 6 gradually decreases from the milling section 2 to the chamfer section 4. The design of the chip flute 6 can effectively guide the chips generated in the machining process to be smoothly discharged, avoid the machining obstacles caused by chip accumulation, and improve the machining efficiency and the cutting performance of the cutter. The gradually decreasing design of the width of the chip flute is suitable for short cutting, brittle material, chip compression, and fast discharge speed. The gradually decreasing width of the chip flute helps to reduce unnecessary gaps, enhance the rigidity of the cutter structure, especially the end part of the cutter, and maintain higher cutting stability. It can be understood that the gradually increasing width of the chip flute is also an option, which is suitable for long chips, ductile material, and good fluidity. Further, a 45° chip guide rib can be arranged in the chip flute 6. The 45° inclined design guides the chips to be smoothly discharged and avoids the chips from winding around the cutter or the workpiece.

[0028] In the embodiment, the shank 1 is provided with a cooling liquid channel 7, the inlet of the cooling liquid channel 7 is arranged at the end of the shank, the outlet is directed to the front part of the milling section 2, and the diameter of the cooling liquid channel 7 is 1 mm. The design of the cooling liquid channel 7 helps to provide cooling liquid for the cutter in time during the machining process, reduces the machining temperature, reduces the thermal expansion of the cutter, further prolongs the service life of the cutter, and improves the cutting performance.

[0029] In the embodiment, the first connecting part 51 and the second connecting part 52 are smooth transition structures. The smooth transition design can reduce the stress concentration of the connecting part, avoid the machining instability caused by the uneven structure, and improve the overall stability and machining precision of the cutter.

[0030] The utility model discloses a function integration and structure optimization solve the traditional thread hole processing process dispersion, the problem of low efficiency, especially suitable for batch processing scene, has remarkable economic benefit and practical value.

[0031] The above-mentioned embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it can not be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A multi-functional dental milling tool, characterized by, From the handle to the knife tip in turn includes the handle (1), chamfer section (4), tapping section (3), milling section (2); The milling section (2) includes four spiral edges (21), the spiral edge (21) edge is ladder high distribution; The tapping section (3) includes three groups of different pitch thread edge (31); The chamfer section (4) includes chamfer edge (41) and deburring edge (42), the milling section (2), tapping section (3) are connected through first connecting part (51), and the tapping section (3), chamfer section (4) are connected through second connecting part (52).

2. The multi-functional dental milling cutter according to claim 1, wherein The adjacent edge high difference of the spiral edge (21) of the milling section (2) is 0.05mm, and the blade angle is 90°.

3. The multi-functional dental milling cutter according to claim 1, wherein The spiral angle of the spiral edge (21) of the milling section (2) is 30°, and the blade tip has R0.1mm roundness.

4. The multi-functional dental milling cutter according to claim 1, wherein The pitch of the three groups of thread edges (31) of the tapping section (3) is 1mm, 0.8mm and 0.6mm respectively.

5. The multi-functional dental milling cutter according to claim 1, wherein The chamfer edge (41) of the chamfer section (4) has an inclination angle of 30°, the deburring edge (42) has an inclination angle of 45°, and the interval between the two edges is 0.2mm.

6. The multi-functional dental milling cutter according to claim 1, wherein The milling tap also includes a chip groove (6) extending from the front end of the milling section (2) to the chamfer section (4), and the width of the chip groove (6) gradually decreases from the milling section (2) to the chamfer section (4).

7. The multi-functional dental milling cutter according to claim 1, wherein The handle (1) is provided with a cooling liquid channel (7), and the inlet of the cooling liquid channel (7) is arranged at the end of the handle, and the outlet is directed to the front of the milling section (2), and the diameter of the cooling liquid channel (7) is 1mm.

8. The multi-functional dental milling cutter according to claim 1, wherein The first connecting part (51) and the second connecting part (52) are smooth transition structures.

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