CN209139921U - Milling cutter - Google Patents

Abstract

The utility model provides a milling cutter, which comprises a tool handle, a tool base body connected with the tool handle, and a milling cutter head arranged on the cutter base body, wherein the milling cutter head comprises two first cutter teeth and two two second cutter teeth, the two first cutter teeth are symmetrical with respect to the central axis of the milling cutter, the two second cutter teeth are symmetrical with respect to the central axis of the milling cutter, and the first cutter teeth are symmetrical with respect to the central axis of the milling cutter The teeth and the second cutter teeth are alternately arranged, the two first cutter teeth are T-shaped knives, and the two second cutter teeth are dovetail knives. The above milling cutter can simultaneously complete the two processing requirements of opening the T-slot on the workpiece and chamfering the T-slot.

Description

milling cutter

technical field

The utility model relates to a cutter, in particular to a milling cutter.

Background technique

In the process of computer numerical control (CNC) machining, the workpiece is often required to be grooved. In some grooves, the size of the station is required to be high, and no R angle is allowed at the forming chamfer. In order to ensure that no R angle is allowed at the forming chamfer, according to the existing processing technology, two forming milling cutters are required for processing: one is a T-shaped milling cutter, which is used for side milling; the other is a dovetail type. Milling cutter for chamfering. Although two tools can be used to meet the processing requirements, the processing time and processing cost are relatively large.

Utility model content

In view of the above situation, it is necessary to provide a milling cutter to solve the above problems.

A milling cutter includes a tool handle, a tool base connected with the tool handle, and a milling cutter head arranged on the cutter base, the milling cutter head comprising two first cutter teeth and two second cutters teeth, the two first cutter teeth are symmetrical with respect to the central axis of the milling cutter, the two second cutter teeth are symmetrical with respect to the central axis of the milling cutter, and the first cutter teeth and the The second cutter teeth are alternately arranged, the two first cutter teeth are T-shaped knives, and the two second cutter teeth are dovetail knives.

Further, each of the first cutting teeth has a first cutting edge, each of the second cutting teeth has a second cutting edge, and the first cutting edge and the second cutting edge have equal helix angles.

Further, the helix angle of the first blade and the second blade ranges from 29° to 31°.

Further, the range of the peripheral rake angles of the first cutting edge and the second cutting edge is 11°˜13°.

Further, the first peripheral relief angle of the first blade and the second blade ranges from 11° to 13°.

Further, the width behind the first peripheral edge of the first cutting edge and the second cutting edge is 7% to 8% of the diameter of the milling cutter.

Further, the range of the second peripheral relief angle of the first blade and the second blade is 24°˜26°.

Further, the milling cutter has a core portion, and the diameter of the core portion is 40% to 50% of the diameter of the milling cutter blade.

Further, the drop of the first blade is 0.05-0.1 mm larger than the drop of the second blade.

Further, the two first cutter teeth and the two second cutter teeth are right-handed.

The milling cutter head of the above-mentioned milling cutter comprises two first cutter teeth and two second cutter teeth, the first cutter teeth and the second cutter teeth are alternately arranged, the first cutter tooth is a T-shaped cutter, and the second cutter tooth is a dovetail type. Knife. Therefore, two processing requirements of opening the T-slot on the workpiece and chamfering the T-slot can be simultaneously completed during processing, thereby improving the processing efficiency and reducing the processing cost.

Description of drawings

1 is a schematic perspective view of a milling cutter in an embodiment of the present invention.

FIG. 2 is a perspective view of the milling cutter shown in FIG. 1 from another angle.

FIG. 3 is a bottom view of the milling cutter shown in FIG. 1 .

FIG. 4 is a side view of the milling cutter head in the milling cutter shown in FIG. 1 .

FIG. 5 is a side view of the milling head shown in FIG. 4 from another angle.

FIG. 6 is a cross-sectional view of the milling cutter shown in FIG. 5 along line VI-VI.

Description of main component symbols

milling cutter 100 handle 10 Tool base 20 milling head 30 first tooth 31 first blade 311 second tooth 32 second blade 321 Helix angle beta Rake angle β1 first week back angle α1 The width of the blade in the first week f1 Second week back angle α2 Core diameter d The first blade drop h1 The second blade drop h2

The following specific embodiments will further illustrate the present invention with reference to the above drawings.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to FIG. 1 to FIG. 3 at the same time, the present invention provides a milling cutter 100 . The milling cutter 100 is used for machining a milling workpiece, especially a workpiece made of composite materials such as aluminum alloys.

The milling cutter 100 includes a tool holder 10 , a tool base 20 connected to the tool holder 10 , and a milling cutter head 30 disposed on the tool base 20 . The tool holder 10 , the tool base body 20 and the milling bit 30 are made of cemented carbide, but not limited thereto. The tool holder 10 is cylindrical and is used to be externally connected to a processing device (not shown) to drive the milling cutter head 30 to rotate.

The milling cutter head 30 includes two first cutter teeth 31 and two second cutter teeth 32 , the two first cutter teeth 31 are symmetrical with respect to the central axis of the milling cutter 100 , and the two second cutter teeth 32 are relative to the milling cutter 100 The central axis is symmetrical, and the first cutter teeth 31 and the second cutter teeth 32 are alternately arranged. The two first cutter teeth 31 and the two second cutter teeth 32 are right-handed. The two first cutter teeth 31 are T-shaped cutters, which are used for milling the T-slot on the side of the workpiece. The two second teeth 32 are dovetail-shaped knives for chamfering of the T-slot.

Please refer to FIGS. 4 to 6 at the same time, each of the first teeth 31 has a first edge 311 , and each of the second teeth 32 has a second edge 321 . The first blade 311 and the second blade 321 have the same helix angle β.

Preferably, the helix angle β of the first blade 311 and the second blade 321 ranges from 29° to 31°.

Preferably, the first cutting edge 311 and the second cutting edge 321 satisfy the following conditions: the range of the peripheral edge rake angle β1 is 11°～13°, the range of the first peripheral edge relief angle α1 is 11°～13°, and the first The peripheral relief width f1 is 7% to 8% of the edge diameter of the milling cutter, and the range of the second peripheral relief angle α2 is 24° to 26°.

The milling cutter 100 has a core, preferably, the diameter d of the core is 40% to 50% of the diameter of the milling cutter.

Preferably, the drop h1 of the first blade is larger than the drop h2 of the second blade by 0.05-0.1 mm.

The milling head 30 also includes four flutes 33 . The chip flutes 33 are respectively formed between the adjacent first cutter teeth 31 and the second cutter teeth 32 .

During processing, since the first cutter teeth 31 are T-shaped cutters, the side surface of the workpiece can be grooved and milled, and the second cutter teeth 32 coaxially arranged with the first cutter teeth 31 are dovetail cutters, which can The T-slot processed by the cutter teeth 31 is chamfered to ensure that there is no R angle in the chamfered part of the T-slot, and the machining requirements are fulfilled.

The milling cutter head 30 of the above-mentioned milling cutter 100 includes two first cutter teeth 31 and two second cutter teeth 32, the first cutter teeth 31 and the second cutter teeth 32 are alternately arranged, and the first cutter teeth 31 are T-shaped cutters, The second blade teeth 32 are dovetail type blades. Therefore, two processing requirements of opening the T-slot on the workpiece and chamfering the T-slot can be simultaneously completed during processing, thereby improving the processing efficiency and reducing the processing cost.

It can be understood that, in other embodiments, the two first cutter teeth 31 and the two second cutter teeth 32 can also be left-handed.

In addition, those skilled in the art can also make other changes within the spirit of the present invention. Of course, these changes made according to the spirit of the present invention should all be included in the scope of protection of the present invention.

Claims (10)

1. A milling cutter comprising a tool holder, a tool base connected with the tool holder and a milling cutter head arranged on the cutter base, wherein the milling cutter head comprises two first cutter teeth and two second cutter teeth, the two first cutter teeth are symmetrical with respect to the central axis of the milling cutter, the two second cutter teeth are symmetrical with respect to the central axis of the milling cutter, and the first cutter teeth are symmetrical with respect to the central axis of the milling cutter A knife tooth and the second knife tooth are alternately arranged, the two first knife teeth are T-shaped knives, and the two second knife teeth are dovetail knives. 2. The milling cutter of claim 1, wherein each of the first teeth has a first edge, each of the second teeth has a second edge, the first edge and the The second cutting edge has an equal helix angle. 3 . The milling cutter according to claim 2 , wherein the helix angle of the first cutting edge and the second cutting edge ranges from 29° to 31°. 4 . 4 . The milling cutter according to claim 2 , wherein the rake angle of the peripheral edge of the first cutting edge and the second cutting edge ranges from 11° to 13°. 5 . 5 . The milling cutter according to claim 2 , wherein the first peripheral relief angle of the first cutting edge and the second cutting edge ranges from 11° to 13°. 6 . 6 . The milling cutter according to claim 2 , wherein the first peripheral edge width of the first cutting edge and the second cutting edge is 7% to 8% of the diameter of the milling cutter. 7 . 7 . The milling cutter according to claim 2 , wherein the second peripheral relief angle of the first cutting edge and the second cutting edge ranges from 24° to 26°. 8 . 8 . The milling cutter according to claim 2 , wherein the milling cutter has a core, and the diameter of the core is 40% to 50% of the blade diameter of the milling cutter. 9 . 9 . The milling cutter according to claim 2 , wherein the drop of the first cutting edge is larger than that of the second cutting edge by 0.05-0.1 mm. 10 . 10 . The milling cutter according to claim 1 , wherein the two first cutter teeth and the two second cutter teeth are right-handed. 11 .