KR20190060084A - System for direct injection of cutting oil in a spindle of a machine tool - Google Patents

Abstract

Provided is a system for injecting a cutting oil into a spindle side of a machine tool. The system for injecting the cutting oil into the spindle side of the machine tool comprises: a shank unit arranged at one end to be gripped at the spindle; a tool attachment unit arranged at the other end to have an insertion hole, into which a tool is inserted, on a front tip surface; a cover having a cylindrical wall covering the periphery of the tool attachment unit and a bottom surface covering the tip end surface of the tool attachment unit; a bearing arranged between the cylindrical wall and the tool attachment unit; a helical flow path transforming a centrifugal force, generated at the spindle, into a linear motion; a jet nozzle arranged at one side on the bottom surface, separated from the spindle not to rotate and generating a centripetal force; an external cover strengthening the centripetal force of the jet nozzle; a first nozzle unit supplying an induced cutting oil to a turret; and a second nozzle unit preventing leakage of the cutting oil. The present invention prevents wear of the nozzle which supplies the cutting oil to the turret to prevent leakage of the cutting oil.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine tool spindle side coolant injection system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine tool spindle side cutting oil injection system, and more particularly, to a cutting oil injection system that injects cutting oil without spreading on a machine tool.

BACKGROUND ART Conventionally, in order to increase the life span of a tool, it has been generally practiced to supply a coolant to a tool during machining by a machine tool.

The method of supplying the cutting oil was originally an external lubrication system that ejects cutting oil from the nozzle provided toward the tool. However, in the external oil supply system, since the cutting oil sprayed from the nozzle is obstructed by the workpiece and can not reach the machining portion, it has been difficult to effectively supply the cutting oil. In addition, since there is a fear that the workpiece and the nozzle may interfere with each other, it is necessary to provide the nozzle at a position spaced away from the workpiece, so that it has been difficult to supply the cutting oil to the machined portion with good precision. Further, since machine tools such as a machining center for replacing tools with ATC (automatic tool changer) during machining have been popular, there has been a demand to change the supply position of the cutting oil for each tool, but the position of the nozzle is fixed The external lubrication system can not respond to these requests. Therefore, the external oil supply system has been replaced by a cutter through system or a skimmer through system, which will be described later, and external oil supply systems are rarely employed at present in machine tools.

On the other hand, in the cutter-through method, a lubricant supply hole is provided in the interior of the tool to open the tool tip, and the coolant is supplied to the machined portion through the lubricant supply hole (see Patent Documents 1 and 2).

However, in the cutter-through method, since the oil supply hole is opened at the tip of the tool, the tool for cutting the workpiece by the blade portion of the tool peripheral surface such as face mill or end mill can not efficiently perform lubrication and cooling of the blade portion. Further, since it is necessary to provide an oil supply hole in the tool, it becomes an expensive tool. In addition, when the tool is of a small diameter, it is very difficult to form the oil supply hole in the tool itself.

On the other hand, the skimmer-through method refers to a method of spraying cutting oil from the gap between the skimmer nut and the outer periphery of the tool by attaching a skimmer nut to the tip of the spindle side cutting oil injection system of the machine tool. It is available.

For example, Patent Document 3 describes a machine tool spindle side coolant injection system corresponding to a skimmer-through system. In this machine tool spindle side cutting oil injection system, a skimmer nut having a spiral groove formed on the inner circumferential side is attached to the tip, and a coolant is sprayed from a gap between the skimmer nut and the outer periphery of the tool. Accordingly, the cutting oil sprayed through the spiral groove of the skimmer nut is efficiently supplied to the machining portion along the flank face of the tool.

Although not related to the oil supply system of the machine tool spindle side cutting oil injection system, Patent Document 4 discloses a traction drive system in which a rotation input from a transmission shaft connected to a spindle of a machine tool is increased by a traction drive mechanism and transmitted to a main shaft Of the drive spindle. The traction transmission mechanism is made up of a combination of a planetary roller and a sun roller and is adapted to transmit rotation from a planetary roller that revolves with the spindle to a sun roller connected to the main shaft. A machining tool attaching portion is provided at the tip end of the main shaft to which the rotation is inputted from the transmission shafts through the traction transmission mechanism. A tool (for example, a grindstone) is attached to the machining tool attaching portion.

In the drive spindle disclosed in Patent Document 4, a traction transmission mechanism and a cooling device for cooling the main shaft bearing are provided. This cooling device has a cooling jacket provided on the outer periphery of the traction transmission mechanism and on the outer periphery of the main shaft bearing and a cooling medium passage extending from the outer peripheral portion of the transmission shaft body to the cooling jacket of the main shaft bearing through the cooling jacket of the traction transmission mechanism. The cooling medium introduced into the cooling medium passage is ejected from a cooling jacket of a traction transmission mechanism and a cooling jacket of the main shaft bearing, and then ejected from an outlet formed in a bearing pressing plate for pressing the outer ring of the main shaft bearing.

Therefore, there is a need to research and develop a machine tool spindle side coolant injection system capable of spraying the cutting oil on the spindle side of the machine tool without spreading.

Japanese Laid-Open Patent Publication No. 2009-6435 Japanese Patent Application Laid-Open No. H04-176538 Japanese Patent Application Laid-Open No. 2003-1545 Japanese Utility Model Publication No. H03-123657

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and it is an object of the present invention to provide a coolant injection device capable of injecting coolant to the side of a spindle of a machine tool, And a nozzle for supplying the cutting oil to the turret is prevented from being worn so that the cutting oil does not leak.

In order to overcome the centrifugal force generated when the main spindle rotates, a centrifugal force is used to cancel the centrifugal force, and a coolant is directly supplied to provide a machine tool spindle side coolant injection system capable of supplying coolant to a desired position without spreading .

A machine tool spindle side cutting oil injection system according to the present invention is a machine tool spindle side cutting oil injection system comprising a shank portion provided at one end and a shank portion held at the main shaft and a tool attaching portion provided at the other end and having an insertion port into which the tool is inserted, A cover having a tubular wall covering the tubular wall and a bottom surface covering the tip end surface of the tool attaching portion, a bearing provided between the tubular wall of the cover and the tool attaching portion, a helical flow path for converting the centrifugal force generated in the main axis into a linear motion, A jet nozzle which is provided at one side of the bottom surface and is separated from the main shaft and generates no centrifugal force to generate centripetal force, an outer cover which strengthens the centripetal force of the jet nozzle, a first nozzle part which supplies inflowing coolant to the turret, And a second nozzle portion for preventing leakage.

According to an aspect of the present invention, the first nozzle unit may include a first nozzle communicating with a coolant inlet port provided in the turret, and a second nozzle disposed between the first nozzle and the nozzle shaft, And a first spring that provides a force that can be brought into contact.

According to an aspect of the present invention, the second nozzle unit may include a second nozzle that receives the first nozzle, a second nozzle that is provided between the second nozzle and the nozzle shaft, And a second spring for providing a second spring.

According to an aspect of the present invention, the apparatus may further include a flow gauge having a transparent glass window having a predetermined size so as to confirm the amount of cutting oil from the outside.

According to the present invention, a coolant can be injected into the spindle side portion of a machine tool, and the coolant is sprayed in a direct spraying manner without scattering to supply coolant to the correct position, and a nozzle for supplying coolant to the turret Thereby preventing the abrasion of the cutting oil from leaking, thereby providing a machine tool spindle side coolant injection system.

In order to overcome the centrifugal force generated when the main spindle rotates, a centrifugal force is used to cancel the centrifugal force, and a coolant is directly supplied to provide a machine tool spindle side coolant injection system capable of supplying coolant to a desired position without spreading can do.

1 is a front view of a configuration example of a machine tool spindle side cutting oil injection system according to the first embodiment.
Fig. 2 is a perspective view showing an internal configuration of a machine tool spindle side cutting oil injection system according to the first embodiment. Fig.
Fig. 3 is a diagram showing an external shape of the machine tool spindle side cutting oil injection system according to the first embodiment. Fig.
Fig. 4 is a vertical sectional view showing a configuration example of a machine tool main spindle side cutting oil injection system according to the first embodiment. Fig.
Fig. 5 is a cross-sectional view showing an example of the configuration of a machine tool spindle side cutting oil injection system according to the first embodiment.
6 is a diagram showing a structural example of a machine tool spindle side cutting oil injection system according to a second embodiment, wherein (a) is an overall sectional view of the apparatus, and (b) is a diagram showing a detailed structure for sealing a bearing .
7 is a sectional view taken along the line AA in Fig. 6 (a).

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements and the like of the constituent parts described in the present embodiment are not intended to limit the scope of the present invention unless they include specific descriptions, and are merely illustrative examples.

[First Embodiment]

Fig. 1 is a front view of a configuration example of a machine tool spindle side cutting oil injection system according to the first embodiment. Fig. 2 is a front view of a machine tool main spindle side cutting oil injection system according to the first embodiment. FIG. 3 is a diagram showing an outer shape of a machine tool spindle side cutting oil injection system according to the first embodiment, and FIG. 4 is a diagram showing a machine tool spindle side cutting oil injection system according to the first embodiment. FIG. 5 is a cross-sectional view showing an example of the configuration of a machine tool spindle side cutting oil injection system according to the first embodiment.

1 to 5, a machine tool spindle side cutting oil injection system 100 is provided with a tool mounted on a main shaft of a machine tool and spraying a cutting oil. The apparatus includes a shank portion provided at one end, A cover having a tool attaching portion having an insertion port into which the tool is inserted in a front end surface, a tubular wall covering an outer circumference of the tool attaching portion, and a bottom surface covering the front end surface of the tool attaching portion, A stopper for preventing simultaneous rotation of the cover along the tool attaching portion, a helical flow path for converting the centrifugal force generated in the main shaft into a linear motion, And a jet nozzle for generating centrifugal force.

That is, when the cutting oil is sprayed, the cutting oil also has a centrifugal force due to the centrifugal force generated by the rotation of the main shaft, but it is converted into a linear motion through the helical passage, and the force converted into the linear motion is canceled by the jet nozzle generating the centrifugal force So that the cutting oil can be supplied to the correct position of the tool in the form of a straight line, which is not scattered before the cutting oil is sprayed to the tool.

Meanwhile, the jet nozzle may include a plurality of holes for generating a centrifugal force to cancel the centrifugal force of the main shaft. That is, as the cutting oil passes through the plurality of holes, the centrifugal force is canceled and the powder can be directly cut.

The cover may be provided with a third flow path for discharging the coolant after lubrication and cooling of the bearing.

The bottom surface of the cover may be provided with a through hole through which the tool passes and an air outlet which is arranged around the through hole and injects coolant toward the tool.

As described above, according to the embodiment of the present invention, the coolant can be injected from a position close to the machining portion, and the coolant can be injected by the direct spray method, A side coolant injection system can be provided.

In order to overcome the centrifugal force generated when the main spindle rotates, a centrifugal force is used to cancel the centrifugal force, and a coolant is directly supplied to provide a machine tool spindle side coolant injection system capable of supplying coolant to a desired position without spreading can do.

[Second Embodiment]

Fig. 6 is a diagram showing a configuration example of a machine tool spindle side cutting oil injection system according to the first embodiment. Fig. 6 (a) is an overall sectional view of the machine tool spindle side cutting oil injection system, Fig. 6 Fig. 7 is a cross-sectional view along the line A-A in Fig. 6 (a).

6 (a), the machine tool spindle side cutting oil injection system 1 is used for mounting a tool T on a main shaft (spindle) S and includes a milling chuck main body 2, a cover 20, a bearing 30, and a stopper 40.

On the base end side of the milling chuck main body 2, a shank portion 2A gripped by a main shaft S is provided. The shank portion 2A is a BT (Bottle Grip Taper) shank, and a full stud 3 is screwed to the end portion. Further, a drawbar (not shown) movable in the axial direction is provided inside the main shaft S. The machine tool main spindle side machining fluid injection system 1 (milling chuck main body 2) is moved to the main spindle S by pulling the full stud 3 to the main spindle S side by the operation of the draw bar And is fixed.

On the other hand, the shank portion 2A may be any shape other than the BT shank, such as an HSK shank, a KM shank, and an NT shank.

A tool attaching portion 2B having an insertion port 4 opened to the distal end surface 5 of the milling chuck main body 2 is provided at the tip end side of the milling chuck main body 2. [ A tool T is inserted into the insertion port 4 of the tool attachment portion 2B and fixed by the fastening force of the collet 6. The fixing of the tool T by the collet 6 is performed as follows.

7, the collet 6 is provided with a plurality of slits 7 and a part of the contact surface of the tool attaching portion 2B with the inner wall of the insertion port 4 is tapered 6 (a)). For this reason, the collet 6 is reduced in diameter as it moves toward the main shaft S side, and is diametrically expanded as it moves in the opposite direction.

The collet 6 has a fastening bolt 8 screwed to one end thereof and is integral with the fastening bolt 8. Inside the milling chuck main body 2, a clamping nut 10 is fixed by a clamping nut fixing bolt 11. The male thread of the fastening bolt 8 and the female thread of the fastening nut 10 are screwed together by the threaded portion 12.

When the tool T is attached to the milling chuck main body 2, the fastening bolt hexagonal portion 14 provided at the end portion of the fastening bolt 8 is rotated by a dedicated hexagonal wrench so that the fastening bolt 8 is moved in the axial direction (Moves to the main shaft S side). The collet 6 moves to the side of the main shaft S together with the tightening bolts 8 and the collet 6 is reduced in diameter to grip the tool T. [

On the other hand, when the tool T is detached from the milling chuck main body 2, the fastening bolt hexagonal portion 14 is rotated in the opposite direction. As a result, the collet 6 moves with the fastening bolt 8 opposite to the main axis S, the collet 6 is enlarged, and the gripping of the tool T is released.

6A, the cover 20 is formed in a cup shape as a whole and includes a tubular wall 22 covering the outer periphery of the tool attachment portion 2B and a distal end face 22B of the tool attachment portion 2B 5). The cylindrical wall 22 is formed into a cylindrical shape including the outer race 34 of the bearing 30. [

The bottom surface 24 of the cover 20 is provided with a through hole 21 through which the tool T penetrates and an ejection port 23 arranged around the through hole 21 for ejecting the cutting fluid C have. The jetting port 23 is inclined with respect to the direction of the tool axis so as to approach the outer circumferential surface of the tool T as it is spaced from the main axis S and the inclination angle alpha is set at a desired position of the tool T It is preferable that it is appropriately adjusted so as to be supplied.

By providing a plurality of jetting ports 23-1, 23-2, and 23-6 having different inclination angles? Relative to the direction of the tool axis as described above, the cutting oil C is jetted in a plurality of directions, It is possible to supply the coolant C through the coolant supply pipe. This makes it possible to reach the machining portion with the cutting oil C sprayed from any one of the spouting openings 23 even when the cutting oil C blocked by the workpiece is difficult to be supplied to the machining portion.

On the other hand, it is preferable to adjust the inclination angle alpha of each jetting port 23 according to the length of the tool T. When handling a plurality of types of tools T having different lengths, It is preferable to prepare the cover 20 having the jetting port 23 of the appropriate angle of inclination in advance.

Further, in machining using a drill or a tap, since cutting oil can not be directly supplied to the machining portion inside the hole formed in the workpiece, the cutting oil is sprayed toward the gap between the hole edge of the surface of the workpiece and the tool, It is necessary to supply coolant to the inside of the hole. If the tool T is a drill or a tab, the machine tool spindle side cutting fluid injection system 1 (the bottom surface 24 of the cover 20) gradually approaches the workpiece as the machining progresses, ) Of the cutting oil (C) ejected from the workpiece (C) is not constant. 23-1, 23-2, and 23-6 with different inclination angles? Relative to the direction of the axis of the tool may be provided so that the cutting oil C ejected from any one of the ejection openings 23 can be ejected, Can always reach the gap between the hole edge of the surface of the workpiece and the tool. Therefore, the cutting oil is constantly supplied to the inside of the hole through the gap to cool the machined portion inside the hole, and to accelerate the discharge of debris (cutting powder).

Preferably, at least the bottom surface 24 of the cover 20 is detachably attached. For example, the bottom surface 24 and a part of the tubular wall 22 (the outer race 34 of the tubular wall 22) can be screwed to the outer race 34 by the threaded portion 38 You may.

The position, diameter and inclination angle with respect to the direction of the tool axis of the bottom surface 24 of the bottom surface 24 are determined by the dimensions of the tool T (in particular, the length of the tool T), the type of the tool T, It is preferable to change it. Thus, at least the bottom surface 24 can be freely detachably attached to the bottom surface 24 (and the tubular wall 24) having the jet port 23 suitable for each tool T through exchange of this portion including the bottom surface 24 22), it is possible to more effectively supply the cutting oil C toward the machining portion.

A first flow path 16 is formed inside the shank portion 2A and the tool attaching portion 2B and extends from the main shaft S side through the first flow path 16 to the tip end surface 5 and the bottom surface 24 of the cover 20. As shown in FIG. The first flow path 16 is constituted by the internal flow path of the full stud 3 and the fastening bolt 8 and the slit 7 (see FIG. 7) of the collet 6 as indicated by the arrow in FIG. 6 . On the other hand, the cutting oil C guided between the front end surface 5 of the tool attaching portion 2B and the bottom surface 24 of the cover 20 through the first flow path 16 is partially discharged from the outlet 23 to the tool T and the rest is supplied to the bearing 30 through the second flow path 18 described later.

By providing the first flow path 16 in which the cutting oil C supplied from the main spindle S side flows in the shank portion 2A and the tool attachment portion 2B in this way, the machine tool main spindle side coolant injection system 1 Is connected to the flow path of the coolant C from the main shaft S to the jet port 23 only by mounting the main shaft S to the main shaft S. [ Therefore, it is possible to easily deal with the automatic exchange of the machine tool spindle side cutting oil injection system 1 by the automatic tool changer (ATC).

The bearing 30 is provided between the inner race 32 fixed to the outer periphery of the tool attachment portion 2B and the outer race 34 constituting a part of the cylindrical wall 22 of the cover 20, (Ball) is a ball bearing. The inner race 32 of the bearing 30 rotates at high speed together with the milling chuck main body 2. On the other hand, the outer race 34 of the bearing 30 is in a stopped state because the rotation stop ring 26 attached to the outer race 34 is restrained by the stopper 40 to be described later.

The sealing of the bearing 30 is carried out in the following manner. The R groove 35 is formed on the inner peripheral side of the outer race 34 in a state in which the closing bolt 37 is screwed into the bearing inlet hole 33 of the outer race 34. [ Thereafter, the closing bolt 37 is removed, and the outer race 34 is attached to the inner race 32 to insert the bearing inlet hole 33 (see FIG. 2) into the R groove 35 between the inner race 32 and the outer race 34 The bearing 30 is inserted. Then, the bearing hole 33 is closed by the closing bolt 37 having the R groove 35 formed at the tip thereof. Accordingly, the bearing 30 is sealed in the R groove 35 between the inner race 32 and the outer race 34. On the other hand, the male screw of the closing bolt 37 and the female screw of the bearing inlet hole 33 screwed thereto are provided only on the base end side of the closing bolt 37 and on the outer circumferential side of the outer race 34, The clearance between the bearing 30 and the R groove 35 of the closing bolt 37 can be adjusted with high accuracy since the position of the closing bolt 37 is restricted when the screw 30 is inserted into the bearing inlet hole 33 of the bearing 30 have.

The tip end surface 5 of the tool attachment portion 2B and the bottom surface 24 of the cover 20 are connected to each other through the first flow path 16 between the cylindrical wall 22 and the outer periphery of the tool attachment portion 2B. And a second flow path 18 for allowing a part of the cutting oil C guided to flow through the bearing 30 is provided. The coolant C supplied to the bearing 30 through the second flow path 18 cools and lubricates the bearings 30 to prevent firing.

Thus, even when the tool T is rotated at a high speed, stable machining can be performed without causing the bearing 30 to be burnt. The present inventor has actually confirmed that by supplying the water-soluble cutting oil C to the bearing 30 through the second flow path 18, the bearing portion 30 is not burned even under the condition that the rotation speed of the tool is about 20,000 rpm have.

Here, the flow of the coolant C around the bearing 30 will be described in detail.

A gap 36 (36A, 36B, 36C) is provided between the inner race 32 and the outer race 34 over the entire circumference. The cutting oil that has passed through the second flow path 18 between the cylindrical wall 22 and the outer periphery of the tool attaching section 2B is cooled by the cooling of the bearing 30 during the flow of the gap 36 (36A, 36B, 36C) And lubrication are performed. The cooling fluid after cooling and lubrication of the bearing 30 is discharged by the third flow path 50. The third flow path 50 includes a communication hole 52 through which the coolant flows in the radially outward direction from the R groove in which the bearing 30 is enclosed and a communication hole 52 that passes through the gap 36C and reaches the upper surface of the outer race 34 An upper surface groove 53 through which the cutting oil flows radially outward and a through hole 54 through which the cutting oil from the communication hole 52 and the upper surface groove 53 join together to discharge downward.

As described above, the third flow path 50 is provided to promote the discharge of the cutting oil C after cooling and lubrication of the bearing 30, thereby preventing clogging of the cutting oil C around the bearing 30, Fresh cutting oil (C) is always supplied to the bearing (30), so that cooling and lubrication can be performed efficiently. Since the smooth flow of the cutting oil C from the bearing 30 toward the outside through the third flow path 50 is formed, mixing of the bubbles from the outside due to the rotation of the bearing 30 is prevented, Even if foreign matter is mixed into the cutting oil, it is reliably discharged to the outside, so that the function of the bearing 30 is not hindered.

The width of the gap 36B sandwiched between the two rows of the bearings 30 is preferably larger than the width of the other gaps 36A and 36C. Accordingly, the coolant C can be stably supplied to the second-stage bearing 30 (the upper bearing 30 in Fig. 9). The width of the gap 36C which is the flow path immediately after the second row of the bearings 30 is made the smallest among the gaps 36 (36A, 36B and 36C), and the coolant flows through the communication holes 52 with sufficient pressure, It is possible to prevent the clogging of the baffle 30, thereby making it possible to efficiently perform cooling and lubrication, and to effectively prevent mixing of bubbles and discharge of foreign matter. For example, the width of the gap 36B may be about 0.5 mm, the width of the gap 36A may be about 0.2 mm, and the width of the gap 36C may be about 0.05 mm.

On the other hand, the width (or diameter) of the communication hole 52, the upper surface groove 53 and the through hole 54 is equal to the width (or diameter) of the gap 36A which is the passage just before the first row of the bearings 30 50) of the inlet-side flow path). Accordingly, the discharge of the cutting oil after cooling and lubrication of the bearing 30 is promoted to prevent clogging of the cutting oil around the bearing 30, and fresh cutting oil is always supplied to the bearing 30 to cool and lubricate And can be performed efficiently. For example, the diameter of the communication hole 52 may be about 0.3 mm, and the width (diameter) of the upper surface groove 53 and the through hole 54 may be about 0.5 mm.

The outer race 34 and the rotation stop ring 26 may be different from each other and the third flow path 50 may be formed only in the outer race 34. [

 By making the outer race 34 different from the rotary stop ring 26, even if the outer race 34 or the rotary stop ring 26 is broken or broken, only the failed or damaged component can be selectively replaced .

Further, since the third flow path 50 is formed only in the outer race 34, machining is facilitated, and manufacturing cost can be reduced.

6A, the stopper 40 includes a rotation stopping pin 42 that is engaged with the recess 27 on the outer periphery of the rotation stopping ring 26, A piston rod 46 for supporting the piston rod 42, and an air cylinder 48 for moving the piston rod 46 forward and backward. On the other hand, the air cylinder 48 may be fixed to the Z axis of the machine tool side.

The piston rod 46 moves in the longitudinal direction by the driving force of the air cylinder 48 and the rotation stopping pin 42 is inserted into the recess 27 of the rotation stopping ring 26, ). Since the piston rod 46 and the air cylinder 48 are arranged on the upper side of the rotation stop ring 26 so that the longitudinal direction of the piston rod 46 is inclined relative to the axis direction of the tool T It is possible to prevent interference with the workpiece.

Although the embodiments of the present invention have been described in detail, the present invention is not limited thereto, and various modifications and changes may be made without departing from the gist of the present invention.

For example, the content described in the first embodiment and the content described in the second embodiment may be appropriately combined.

* 1 Machine tool spindle side coolant injection system
2 milling chuck main body
2A shank portion
2B tool attachment
3 full studs
4 inserts
5-sided cross section
6 Collet
7 slit
8 fastening bolts
10 Clamping nut
11 Fastening nut fixing bolt
12 thread
14 Tightening Bolt Hex
16 First Euro
18 second euro
20 cover
21 through hole
22 tubular wall
23 outlets
24 bottom
26 Rotation stop ring
27 concave portion
28 Wall
29 set screw
30 Bearings
32 inner race
33 Bearing entry hole
34 outer race
35 R Home
36 Clearance
37 Closing bolts
37 closed
38 thread
40 stopper
42 Stop pin
44 spring
46 Piston rod
48 air cylinder
50 third euro
52 communication hole
53 Top surface groove
54 through hole
60 Circular portion
62 slot hole portion
63 C side
70 rectification member (pressure controller)
71 rear section
72 protrusion
74A through hole
74B through hole
76 outlet
78 thread

Claims (4)

A shank portion provided at one end and held by the main shaft,
A tool attachment portion provided at the other end, the tool attachment portion having an insertion port into which the tool is inserted,
A tubular wall covering the outer periphery of the tool attaching portion, and a cover having a bottom surface covering the distal end surface of the tool attaching portion,
A bearing provided between the tubular wall of the cover and the tool attaching portion,
A helical flow path for converting the centrifugal force generated in the main spindle into a linear motion,
A jet nozzle which is provided at one side of the bottom surface and is separated from the main shaft to rotate without generating centrifugal force,
An outer cover for enhancing the centrifugal force of the jet nozzle,
A first nozzle unit for supplying the introduced cutting oil to the turret,
A second nozzle unit for preventing leakage of cutting oil,
A machine tool spindle side coolant injection system. The method according to claim 1,
Wherein the first nozzle unit comprises:
And a first spring provided between the first nozzle and the nozzle shaft to provide a force for allowing the first nozzle to be brought into close contact with the coolant inflow port, the first nozzle communicating with the coolant inlet port provided in the turret, Wherein the machine tool spindle side coolant injection system comprises: The method according to claim 1,
The second nozzle unit includes:
And a second spring provided between the second nozzle and the nozzle shaft for providing a force with which the second nozzle can be brought into close contact with the turret, Machine spindle side coolant injection system. The method according to claim 1,
Further comprising a flow gauge having a transparent glass window having a predetermined size so as to confirm the amount of cutting oil from the outside.

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