KR20150009398A - End Mill Tool for High-Speed Machining - Google Patents

Abstract

An end mill tool for high-speed machining is provided. According to an embodiment of the present invention, an end mill tool for high-speed machining includes: a shank having a coupling groove formed with a predetermined depth, and a guide member extending toward the outside of the coupling groove; and a main blade inserted into the coupling groove, and having one surface fixed to the guide member in a state of being in close contact therewith, wherein the main blade includes a first blade extending in a horizontal state, a second blade extending from a front end portion of the first blade to have an inclination angle of 3° to 5°, and an insertion piece integrated with the first and second blades to be inserted into the coupling groove.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a high-

The present invention relates to an end mill tool for high-speed machining in which an industrial diamond is installed on a main blade of an end mill tool for performing a high-speed machining operation to improve the life and durability.

In recent years, the overall trend in the industrial field tends to produce a small quantity of various kinds of products in order to meet various demands of customers, and as the life cycle of the product shortens, rapid production of the molds is urgently required. It is essential to introduce high-speed machining technology to process machining more than three times of normal machining while satisfying requirements such as productivity improvement and cost reduction.

High-speed machining means machining technology that significantly reduces material removal rate (MRR), thereby reducing production costs and production time.

The cutting speed is selected in consideration of the following points in not only general cutting but also high speed processing. (Turning, milling, drilling, etc.), machine tools (power, static and dynamic stiffness), cutting tools (high speed steel, cemented carbide, ceramics, CBN, diamond, etc.) and requirements (shape, size, rigidity, precision, etc.) of parts. In addition, it is difficult to define the absolute cutting speed for high-speed machining because it is selected according to the ease of chip discharge, stability, and economy. This is because there is a large difference in the cutting speed that can be machined within an appropriate tool life depending on the type of workpiece.

Cutting characteristics of high-speed machining are as follows: First, during cutting, cutting is a process in which a workpiece is subjected to elastic deformation and plastic deformation in the form of chips as the tool or workpiece moves. Most materials yield in a material test at a strain of 0.002 (0.2%) and fracture in the range of 0.01 to 0.1.

As an example, an end mill is a tool made by adding a shank to a milling tool. The end mill is a high-speed steel on round round bar, or on a hard tool material such as a cemented carbide to grind a high precision flute and a flank, And rotating and simultaneously transporting the workpiece, the hard workpiece such as aluminum and steel can be cut out of the side of the workpiece in accordance with the intended use, or freely used in any direction in the vertical direction of the workpiece It is possible to perform frontal cutting, side cutting, single cutting, grooving, and curved cutting with one tool, and in some cases, it is possible to perform hole machining or counter bore machining. Therefore, the end mill is an important tool which is an indispensable tool in machining and occupies a very high proportion.

Korean Patent Publication No. 10-2013-0039109 (published on Apr. 19, 2013)

Embodiments of the present invention aim to provide an end mill tool that minimizes noise generation, tremor and frictional force of an end mill tool used under high-speed rotation conditions.

According to an aspect of the present invention, an end mill tool includes: a shank having an engaging groove formed at a predetermined depth; and a guide member extending toward the outside of the engaging groove; And a main blade inserted in the coupling groove and fixed to the guide member in a state in which one surface is in close contact with the main blade, wherein the main blade includes a first blade extending in a horizontal direction, And an insertion piece integrally formed with the first and second blades and inserted into the coupling groove.

And the main blade is made of industrial diamond.

And the end mill tool is used under a condition that high-speed rotation is performed at a speed of 30,000 to 70,000 rpm or more.

Wherein the second blade is made to have an inclination angle of 3 DEG or less when the diameter of the object to be machined is 2 mm or less and the inclination angle is 5 DEG or less when the diameter of the object is 3 mm to 4 mm or less, Is formed so as to have a degree of freedom.

And a length ratio between the first blade and the second blade is maintained at a ratio of 1: 1.2.

Embodiments of the present invention can prevent the phenomenon due to abrasion even in an environment where high-speed rotation is performed by using an end mill tool using a main blade made of industrial diamond, The accuracy of the object to be machined is improved and the life of the end mill tool is prolonged.

Since the embodiments of the present invention are inserted and fixed in the shank, the occurrence of noise and noise generated during high-speed rotation is reduced, thereby minimizing the generation of unnecessary noise.

1 is an exploded perspective view of an end mill tool for high-speed machining according to an embodiment of the present invention;
2 is an assembled perspective view of an end mill tool for high speed machining according to an embodiment of the present invention;
Figure 3a is a side view of an end mill tool for high speed machining according to an embodiment of the present invention.
3B is a cross-sectional front view of an end mill tool for high-speed machining according to an embodiment of the present invention.
4 is an operational view of an end mill tool for high speed machining according to an embodiment of the present invention;

A configuration of an end mill for high-speed machining according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of an end mill for high-speed machining according to an embodiment of the present invention, and FIG. 2 is a perspective view of an end mill for high-speed machining according to an embodiment of the present invention.

1 and 2, the end mill tool 1 includes a shank 100 and a main blade 200 inserted into a tip portion of the shank 100 and is rotated at a speed of 30,000 to 70,000 rpm or more It is used under the condition that high-speed rotation is performed.

The shank 100 according to an embodiment of the present invention includes a coupling groove 110 formed at a predetermined depth and a guide member 120 extending toward the outside of the coupling groove 110. The shank 100 is made of a hard metal. The cemented carbide is a metal having a very high hardness which is obtained by firing a carbide powder. The cemented carbide is a sintered alloy consisting of tungsten carbide as a main component. Since about 6% of the tungsten carbide particles have carbon and tungsten melts in the cobalt. Since the cemented carbide is excellent in strength and abrasion resistance, it can be used without being deformed even when it is used for a long time under high-speed rotation conditions.

The coupling groove 110 is formed to be installed in a state where a main blade 200 to be described later is inserted into a front end portion of the shank 100 with a predetermined length and the guide member 120 is engaged with the main blade 200 When the main blade 200 is stressed under the condition that the shank 100 is fast with the main blade 200, the shank 100 is supported by the main blade 200, The stress applied to the main blade 200 can be supported and dispersed to prevent the main blade 200 from being damaged.

Since the length of the coupling groove 110 is relatively longer than the length of the insertion piece 230 according to the thickness of the insertion piece 230 to be described later, the insertion piece 230 is stably inserted, (230) penetrates into the inserted coupling groove (110) and is stably fixed.

A main blade according to an embodiment of the present invention will be described with reference to the drawings.

Referring to FIG. 1 or FIG. 3A, the main blade 200 is made of industrial diamond. The main blade 200 includes a first blade 210 extending in a horizontal direction, And an insertion piece 230 integrally formed with the first and second blades 210 and 220 and inserted into the coupling groove.

The first blade 210 extends horizontally in the horizontal direction as viewed from the drawing. The second blade 220 is inclined with an inclination angle? Of 3 ° to 5 °, The operator can confirm the tilt angle [theta] of the second blade 220 according to the diameter of the object to be machined and perform the work.

For example, when the diameter of the object to be machined is 2 mm or less, the end mill tool 1 is manufactured to have an inclination angle of 3 degrees or less. When the diameter of the object is 3 mm to 4 mm, So as to have an inclination angle.

As described above, when the inclination angle of the main blade 210 is formed at a specific angle, it is possible to precisely shape the object to be processed having a specific diameter, thereby enabling accurate processing of the product.

Since the second blade 220 is formed with the inclination angle with respect to the first blade 210, the contact surface that directly contacts the object to be processed is relatively small, and the frictional force and the load generation are minimized Machining can be performed, so that even when high-speed processing is performed, a phenomenon in which a chip is ejected thinly and adheres to the main blade is also minimized.

The length ratio of the first blade 210 and the second blade 220 according to an embodiment of the present invention is maintained at a ratio of 1: 1.2, and the ratio is set such that the second blade 220 is relatively As shown in FIG. For example, assuming that the length of the first blade 210 is 10 mm, the length of the second blade 220 is 12 mm. The reason why the second blade 220 is extended with such a length is that a chip is essentially generated when the end mill tool 1 rotated at high speed comes into contact with the object to be processed, 1 is stably ejected without being tangled or tangled to the main blade 200 under high-speed rotation conditions.

3B, the main blade 220 according to an exemplary embodiment of the present invention shanks the main blade 220 through high frequency welding after the insertion piece 230 is inserted into the coupling groove 110 And the main blade 200 is fixed in a state of being inserted into the coupling groove 110 formed inside the shank 100 so that even when the end mill tool 1 is rotated at a high speed, The occurrence of noise or noise is minimized.

The state of use of the end mill tool according to one embodiment of the present invention will be described with reference to the drawings.

4, when the diameter of the groove to be machined is 2 mm or less, the worker inserts the main blade 200 having the inclination angle of 3 degrees into the end Mount the mill tool (1) on the milling tool.

When the milling tool is operated, the end mill tool 1 is rotated at a high speed of 60,000 rpm or more to form a foam on the surface of the object to be processed. At the same time, a large amount of chops are transferred to the end mill tool 1 As shown in Fig. The chip is ejected in a relatively thick form due to the inclination angle of the surface of the object and the second blade 220 and stably discharged without being attached to the main blade 200 or unnecessarily entangled.

The object to be machined is stably formed in the grooves or holes of 2 mm by the first and second blades 210 and 220, and even when high-speed machining and a plurality of objects to be machined are processed, vibration or noise of the end mill tool 1, Can be used stably without side effects.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention as set forth in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

100: The shank
110: engaging groove
120: Guide member
200: main blade
210, 220: First and second blades
230: insertion piece

Claims (5)

As end mill tools used for high speed machining operations,
The end mill tool (1)
A shank having an engaging groove formed at a predetermined depth and a guide member extending toward the outside of the engaging groove; And
And a main blade inserted into the coupling groove and fixed in a state where one surface of the guide blade is in close contact with the guide member,
The main blade
A first blade extending in a horizontal direction, a second blade extending from the tip of the first blade at an inclination angle of 3 DEG to 5 DEG, and a second blade integrally formed with the first and second blades, An end mill tool for high speed machining, including an insert. The method according to claim 1,
The main blade
Characterized in that it is made of industrial diamond. The method according to claim 1,
The end mill tool (1)
Is used under the condition that high-speed rotation is performed at a speed of 30,000 to 70,000 rpm or more. The method according to claim 1,
The second blade
The end mill tool is manufactured to have an inclination angle of 3 DEG or less when the diameter of the object to be machined is 2 mm or less and to have an inclination angle of 5 DEG or less when the diameter of the object is 3 mm to 4 mm Wherein the end mill tool for high-speed machining is an end mill tool for high-speed machining. The method according to claim 1,
Wherein a length ratio of the first blade to the second blade is maintained at a ratio of 1: 1.2.

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