JP2002307211A - Cutting tool mounting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply cutting oil without waste to the vicinity of a tip of a cutting tool mounted to a holder rotated at high speed, to carry out cutting, to extremely reduce the scatter of the cutting oil to the circumference even during the high speed rotation of a holder, and to simplify a cutting oil line of the whole device. SOLUTION: This cutting tool mounting device comprises a cutting tool A with an oil supply part 3 formed reaching the vicinity of the mounted part of the tip along the longitudinal direction of a shank part 1; a mounting part 5 for the cutting tool A; and a holder B with an oil passage 6 formed communicating with the mounting part 5 so as to discharge the cutting oil L.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting machine in which a cutting tool is mounted on a holder which rotates at high speed, and cutting oil is supplied to the vicinity of the tip of the cutting tool without waste. The present invention relates to a cutting tool mounting device capable of minimizing scattering of cutting oil around the cutting device and simplifying a cutting oil path of the entire device.

[0002]

2. Description of the Related Art In a machine tool such as a lathe in which a cutting tool is mounted on a holder rotating at a high speed to perform a cutting process, when cutting a work, cutting oil is directed toward a cutting position between the chip of the cutting tool and the work. It is generally practiced to feed the material to improve the machinability and to suppress the work and the chip from becoming hot. When the cutting oil is sent to the vicinity of the tip of the cutting tool, a cutting oil discharge section is provided on the holder side on which the cutting tool is mounted, and the cutting oil is discharged from the discharge section toward the chip.

[0003]

By the way, when the discharge portion t of the cutting oil L is provided on the holder h side, as shown in FIG.
An oil supply passage having a complicated path is formed in the holder h, and a discharge portion of the oil supply passage is formed near the cutting tool b so that the cutting oil L is applied to the tip of the cutting tool b. For this reason, the mounting portion for attaching the cutting tool b to the holder h and the cutting oil discharge portion t must be located at different positions so that they do not overlap each other. Processing is required. In addition, depending on the mounting direction of the cutting tool b, the processing for forming the mounting portion and the oil supply passage k is complicated, and the cost is high.

Further, before the holder h is driven to rotate, that is, in a stopped state or at a low speed, the cutting oil L can be applied substantially accurately and sufficiently to the tip of the cutting tool b. However, when the holder h rotates at high speed, the centrifugal force causes the cutting oil L to be in a mist (atomized) state, so that it is not only impossible to accurately apply to the tip of the cutting tool b, but also the cutting oil L The workpiece W and the apparatus or the peripheral equipment are contaminated with the cutting oil L (see FIGS. 7A and 7B).

[0005] In addition, since the cutting oil L is not accurately applied to the chip, the machinability becomes extremely poor, and the life of the chip is shortened. Further, even if the supply pressure of the cutting oil L is increased in order to improve the state of the cutting oil L applied to the chip, the cutting oil L becomes more mist,
It becomes difficult to lubricate the tip of the cutting tool b, the contamination to the surroundings becomes severe, and a work with particularly high machining accuracy may not be possible. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problem that the cutting oil is not sufficiently applied to the chip at the time of high-speed rotation of the holder, and to complicate a mounting portion of the cutting tool to the holder and a path for sending the cutting oil. It is to prevent that.

[0006]

Means for Solving the Problems Therefore, the inventor of the present invention has intensively studied to solve the above-mentioned problems, and as a result, the present invention
A cutting tool having an oil supply section extending to the vicinity of the tip mounting along the longitudinal direction of the shank section, a mounting section of the cutting tool, and an oil flow passage communicating with the cutting tool mounting section and discharging cutting oil are formed. By using a cutting tool mounting device consisting of a holder, cutting oil can be supplied to the vicinity of the tip of the cutting tool without waste, and scattering of the cutting oil around the holder can be extremely reduced even when the holder is rotating at high speed. Further, the present invention solves the above-described problem by simplifying the configuration of the cutting tool mounting portion and the supply path of the cutting oil.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. The main configuration of the present invention is a cutting tool A and a holder B. The cutting tool A includes a shank portion 1, a tip 2, and a refueling portion 3 (see FIG. 2). The shank portion 1 has a round shaft shape, and a flat surface 1a is formed on the surface of the cutting tool on the chip forming side along the longitudinal direction. When the cutting tool A is mounted on the holder B, the flat surface 1a serves as a portion where the lock screw on the holder B comes into contact, and serves to prevent idling in the cutting tool mounting portion on the holder B side. is there.

A tip 2 is mounted on the tip of the shank 1. The shank tip surface 1b, which is substantially flush with the mounting position of the chip 2, has a step with the flat surface 1a and is a surface lower than the flat surface 1a [FIGS. C)]. The chip 2 is provided with an appropriate rake angle with respect to the flat surface 1a as needed.

[0009] The shank portion 1 is provided with an oil supply portion 3 along the longitudinal direction. The oil supply section 3 is a passage for supplying the cutting oil L to the vicinity of the tip 2 of the cutting tool A, and is configured such that the cutting oil L is not easily scattered around during cutting. The refueling section 3 is provided with the flat surface 1
The lubrication section 3 is formed on the side a and one end in the longitudinal direction of the refueling section 3 reaches the shank section 1 near the mounting of the tip 2.

[0010] There are a plurality of types of the shape of the refueling section 3, and the first type is a channel-shaped path 3a (see Fig. 2). The channel 3a is formed along the flat surface 1a, is formed from the rear end to the front end of the shank portion 1, and is formed between the flat surface 1a and the step portion between the shank tip surface 1b. It is formed between them. The cross-sectional shape orthogonal to the longitudinal direction of the channel 3a is a rectangular shape such as a concave shape, but may be a semicircular shape.

Next, as a second type of the refueling section 3, a tubular passage 3b having a through-passage shape instead of the groove-like shape is used.
Are formed (see FIG. 3). The tubular path 3b
Are formed from the longitudinal rear end of the shank tip surface 1b to the shank tip surface 1b. On the shank tip surface 1b side of the tubular path 3b, the tubular path 3b is located at a step between the shank tip face 1b and the flat surface 1a.
Is formed. The opening of the tubular passage 3b may be continuous with a part of the shank tip surface 1b in a groove shape (see FIGS. 3A and 3C).

The shank tip surface 1b is connected to the lubricating portion 3
Or in communication with the opening end of the opening. The shank tip surface 1b is provided with cutting oil L from the oil supply unit 3.
Is applied to the chip 2, it also serves as a reservoir for the flow path, and the state of supplying the cutting oil L to the chip 2 can be further improved. Regardless of the type of the lubricating portion 3, it is preferable that the lubricating portion 3 and the mounting position of the tip 2 are set to be on the same side surface of the shank portion 1 [FIGS. 2A and 2B. ) Etc.]. In addition, the fact that the end of the refueling section 3 and the tip 2 are as close as possible,
The cutting oil L is easily supplied to the chip 2 efficiently.

Next, the holder B is mounted with the cutting tool A, rotates at a high speed by receiving power from the rotary drive unit 10 of the machine tool, and performs cutting of the work W with the cutting tool A. The holder B includes an outer peripheral cutting type and an inner peripheral cutting type. First, as shown in FIGS. 4 (A) and 4 (B) and the like, a holder B of the outer peripheral cut forming type is composed of a main body 4 connected to the rotation drive unit 10 and a mounting unit 5 for mounting the cutting tool A. Is done. An oil flow passage 6 is formed in the main body 4. The oil flow passage 6 is provided with an oil feed unit 10 a for sending the cutting oil L attached to the rotary drive unit 10 of the machine tool.
During operation, the cutting oil L
And the cutting oil L flows through the oil flow passage 6.

The main body 4 is a rotary drive unit 1 of a machine tool.
0 and a working part 4b on which the mounting part 5 is provided. The connecting part 4a is disk-shaped, and two working parts 4b are provided on the outer periphery of the connecting part 4a. , 4
b are substantially bifurcated so as to face each other. Mounting portions 5 and 5 are formed on both working portions 4b and 4b so that the cutting tool A can be mounted [FIG.
(B)). The cutting tool A is mounted on the mounting portion 5 by the cutting tool 7. Reference numeral 11 in FIG. 1A indicates a plug of the oil flow passage 6 and the unused-side mounting portion 5.

The mounting portion 5 has an axial hole shape.
The inside diameter of the shank portion 1 of the cutting tool A can be inserted. Further, the cross-sectional shape of the hole of the mounting portion 5 is the same as the cross-sectional shape of the shank portion 1, and a flat surface in contact with the flat surface 1 a formed on the shank portion 1 is also formed on the mounting portion 5. The attachment of the cutting tool A can be accurately and easily fixed. The cutting tool A mounted on the mounting portion 5 is housed in the mounting portion 5 except for the tip of the shank portion 1, and substantially the entire refueling portion 3 is located in the mounting portion 5. As a result, the lubricating portion 3 formed as the channel 3a
Constitutes a tubular path together with the mounting portion 5 (see FIG. 1C).

Further, lock screws 8 for fixing the cutting tool A mounted on the mounting portion 5 may be provided. The lock screw 8 is a screw screw member or
It is a hexagon socket head bolt or the like, which is pressed and locked in a direction perpendicular to the longitudinal direction of the shank portion 1. The shaft ends of the lock screws 8, 8 are connected to the flat surface 1
a is preferably set so as to be in contact with a.
(C)).

The oil flow passage 6 is formed in the main body 4, and one end of the oil flow passage 6 is opened at the connection portion 4a, and the other end communicates with the mounting portion 5 from the work portion 4b. [See FIGS. 1A and 1B]. When the connection portion 4a is connected to the rotary drive portion 10, the oil feed portion 10a provided on the rotary drive portion 10 side is connected to the oil flow passage 6, and the cutting is performed from the rotary drive portion 10 side during operation. Upon receiving the oil L, the cutting oil L flows through the oil flow passage 6, and the cutting oil L further flows into the mounting portion 5. The cutting oil L flowing into the mounting portion 5 flows through the oil supply portion 3 of the cutting tool A inserted into the mounting portion 5, and the cutting oil L reaches the tip 2 [FIG. 6 (A),
(B)).

The cutting tool A, which is mounted on the mounting portion 5, has a tip 2 protruding from the mounting portion 5 and the cutting tool A is rotated at a high speed via the rotary drive portion 10. The workpiece W is rotated at high speed to perform a cutting process on the workpiece W. At the time of the cutting, the cutting oil L flowing through the oil supply section 3 of the cutting tool A is supplied to the chip 2, and the cutting operation can be maintained in a good state.

At this time, even if the cutting oil L receives centrifugal force due to the high-speed rotation of the holder B, the amount of the cutting oil L scattered around is very small, and the cutting oil L can be supplied to the chip 2 almost without waste. FIGS. 5A and 5B show an inner peripheral cutting type holder B which is suitable for a workpiece W having an inner peripheral surface to be cut. The work portion 4b of the main body 4 is formed in a cylindrical shape, and a mounting portion 5 is provided at a lower end and an outer peripheral portion of the work portion 4b. FIG. 6C shows a state in which the inner peripheral surface of the workpiece W is cut by the inner peripheral cutting type holder B.

[0020]

According to the first aspect of the present invention, there is provided a cutting tool A having a lubricating portion 3 formed along the longitudinal direction of the shank portion 1 and extending to the vicinity of the tip 2 mounting, a mounting portion 5 of the cutting tool A, and a mounting portion. 5
And a holder B having an oil flow passage 6 for discharging the cutting oil L in communication with the cutting tool L, so that the cutting oil L can be supplied to the vicinity of the tip 2 of the cutting tool A without waste. Therefore, even when the holder B rotates at a high speed, the scattering of the cutting oil L around the periphery can be extremely reduced, and the cutting oil path formed in the holder B can be simplified. Play.

The effect is described in detail. An oil supply portion 3 is formed in the cutting tool A along the longitudinal direction of the shank portion 1 and near the tip 2 mounting.
And an oil flow passage 6 for supplying cutting oil L to the mounting portion 5. With such a structure, at the time of cutting, the cutting oil L flowing from the oil flow passage 6 to the mounting portion 5 by receiving the oil supply from the machine tool side is transmitted through the oil supply portion 3 of the cutting tool A to perform cutting. The oil L can be supplied to two chips with almost no waste.

That is, in the conventional type in which the discharge port of the cutting oil L is formed at a position different from the mounting portion 5 of the cutting tool A, the cutting oil L is supplied to the cutting tool because the tool holder rotates at a high speed. Even if the liquid is ejected to the chip, most of the liquid is scattered to a place other than the chip, and not only the cutting oil L is wasted, but also the surroundings are sometimes contaminated with the cutting oil L. The waste of the cutting oil L as described above can be remarkably reduced.

As described above, the cutting oil L can be sufficiently supplied to the chip 2 in a stable state, and the influence of the centrifugal force can be reduced regardless of the rotation speed of the holder B.
Machinability can be easily improved. Further, since the cutting oil L can be sufficiently supplied to the chip 2, it is possible to efficiently flow the cutting chips during cutting, and from such a point, it is possible to improve the machinability and reduce the cutting time. Shortening and improvement in productivity can be realized. In addition, the cutting life can be improved over a long period of time without shortening the life of the chip, and the cutting can be stabilized with high accuracy.

Further, unlike the conventional type in which the discharge portion of the cutting oil L is provided in the vicinity of the bite mounting portion, the mounting portion 5 and the oil flow passage 6 communicate with each other.
Can be configured by a simple combination of substantially horizontal and vertical paths, and the processing of forming the oil distribution path of the holder B is simplified.

Since the discharge portion of the cutting oil supply passage is not formed near the mounting portion unlike the conventional case, the cutting tool 2 projects only the tip 2 to the outside, and the shank portion 1 mounts the mounting portion 5
Since almost all of them are stored in the cutting tool, the cutting load on the cutting tool A can be extremely reduced.

Next, according to a second aspect of the present invention, in the first aspect, the lubricating portion 3 is a cutting tool mounting device which is a groove-shaped path 3a exposed on the surface of the shank portion 1. Is formed in a groove shape which is exposed to the outside of the shank portion 1, so that the molding can be relatively easily performed, and the manufacture of the cutting tool A can be also easily performed.

Next, according to a third aspect of the present invention, in the first aspect, the lubricating portion 3 is a cutting tool mounting device formed as a conduit 3b penetrating through the shank portion 1. Has a through-hole shape, the cutting oil L flows without waste, and the cutting oil L can be supplied to the chip 2 almost accurately.

Next, a fourth aspect of the present invention is the cutting tool mounting apparatus according to the first, second, or third aspect, wherein the cutting tool A has a flat surface 1a formed along the longitudinal direction. When the cutting tool A is mounted on the mounting portion 5 and fixed with a lock screw or the like, the flat surface 1a is formed, so that the tool can be easily pressed. Alternatively, when the cutting tool A is accurately mounted in the mounting portion 5, the flat inner peripheral surface corresponding to the flat surface 1a is formed on the inner peripheral surface of the mounting portion 5 so that positioning can be efficiently performed when the cutting tool A is mounted. It is something to be done.

[Brief description of the drawings]

1A is a cross-sectional view showing a state in which a cutting tool is mounted on a holder in the present invention. FIG. 1B is an enlarged cross-sectional view showing a state in which a cutting tool is mounted on a mounting part of the holder. FIG. QQ cross-sectional view with a cross section

FIG. 2 (A) is an enlarged perspective view of a first type of a cutting tool according to the present invention; FIG. 2 (B) is an enlarged sectional view orthogonal to the longitudinal direction of the cutting tool; FIG. Is the top view of the cutting tool

3A is an enlarged perspective view of a second type of the cutting tool according to the present invention, FIG. 3B is an enlarged sectional view orthogonal to the longitudinal direction of the cutting tool, FIG. Is the top view of the cutting tool

FIG. 4A is a perspective view of a holder adapted for cutting on the outer peripheral side, and FIG. 4B is a perspective view of the holder as viewed from below.

FIG. 5 (A) is a perspective view of a holder suitable for cutting on the inner peripheral side, and FIG.

FIG. 6A is an operation diagram of cutting on the outer peripheral side. FIG. 6B is an operation diagram of (A) viewed from below. FIG. 6C is an operation diagram of cutting the inner peripheral side of the work.

FIG. 7A is an operation diagram of a conventional type of cutting tool mounting device, and FIG. 7B is an operation diagram of FIG.

[Explanation of symbols]

 A: cutting tool 1: shank portion 1a: flat surface 2: tip 3: oil supply portion 3a: grooved passage 3b: tubular passage 5: mounting portion 6: oil flow passage

Claims (4)

[Claims] 1. A cutting tool having an oil supply section extending in the longitudinal direction of a shank section to the vicinity of a tip mounting, a mounting section of the cutting tool, and an oil flow passage communicating with the mounting section and discharging cutting oil. A cutting tool mounting device comprising a holder formed with a cutting tool. 2. The cutting tool mounting device according to claim 1, wherein the lubrication section is formed as a groove-shaped path exposed on a surface of the shank section. 3. The cutting tool mounting device according to claim 1, wherein the lubrication unit is a tubular passage penetrating through the shank. 4. The cutting tool mounting device according to claim 1, wherein the cutting tool has a flat surface formed along a longitudinal direction.