JPS5933576Y2 - Transducer cooling device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cooling device for a vibration cutting tool that performs vibration machining.

First, we will explain the outline of the internal torsional vibration cutting device of the vibration cutting device.
To explain with reference to the drawing, numeral 11 is a vibrator which is fixed to the vibrating horn 10 and is surrounded by a cooling tube 14 and cooled.

The end face 10c of the vibrating horn 10 is connected to the vibrating cutting tool 13 at the maximum amplitude position, forming a resonant system.

The vibration cutting tool 13 has a flange 13b at the minimum amplitude point.

13 is fixed to the tool holder 8 with a fixing screw 7 via a support member 9.

A blade 18 is attached to the tip of the vibrating cutting tool 13 at a maximum vibration point 13d.

Although not shown in the drawing, the oscillator generates, for example, 20K.
It is excited at a frequency of Hz.

The oscillator 11 resonates at 1 or 2 wavelengths, and at the same time has an amplitude of 3~
The vibration energy is transmitted to the vibrating cutting tool 13 by 5 times magnification, and the vibrating cutting tool 13 resonates at the l wavelength. Vibration is transmitted to

When the vibrator 11 is excited by an oscillator at a frequency of 20K)iZ, the vibrator 11 generates vibration and at the same time the vibrator 1
1 generates a large amount of heat due to distortion, and the excitation power is not entirely converted into vibration energy, but a portion is consumed as heat loss, resulting in high temperature of the vibrator 11, resulting in uniform scratches on the vibrator 11 and damage to the outer sheath of the coil 12. It is necessary to cool it with cooling water or oil because it will melt and lead to poor insulation.

At the same time, the vibrating tool 13 and the vibrating horn 10 are also cooled by the oil supply pipes 50a, 50b and the oil container 8a provided in the tool holder 8, since the vibration causes the material mold to rise and reach a high temperature.

Incidentally, the vibrating cutting tool 13 is generally made of iron, but due to the heat generated, the vibrating tool 13 thermally expands and the vibration node points move, causing abnormal vibrations, so an invar material with a low coefficient of thermal expansion may be used. be.

FIG. 2 is a sectional view of a main part of a conventional vibrating head section.

A flange is provided at the vibration minimum point 10a of the vibration horn 10, and a cooling cylinder 14 is fixed thereto.

Reference numeral 15 denotes a cooling oil supply port, and the cooling oil that enters through the supply port 15 cools the vibrator 11 and is discharged through the discharge port 161.

However, since the supply port 15 and the discharge port 16 are close to each other, the cooling oil flows in a short circuit, resulting in poor cooling efficiency.Also, since the vibration cutting tool 13 and the vibration horn 10 are fixed by screwing, the supply port Since the positions of the cooling tube 15 and the discharge port 16 are not fixed, the bubbles are not cooled and locally heated, causing damage to the vibrator 11.

In addition, since the vibrating cutting tool 13 generates heat, the oil supply pipe 50 in FIG.
Since the tool holder 8 is cooled by the e 50as 50b, the structure of the tool holder 8 becomes complicated.

The present invention eliminates these drawbacks, improves reliability and performance, and simplifies the structure of the tool holder, reducing costs.

An embodiment of the present invention will be described in detail with reference to FIGS. 3 to 10.

FIG. 3 is a sectional view of the vibrating head portion of the present invention.

The feature is a rotatable cooling oil supply port 34.
A conduit 40e for discharging cooling oil in the longitudinal direction approximately at the center of the vibrating horn 4° and the vibrating cutting tool 43 is provided, and a plurality of discharge ports 40.
It has a structure in which e405 is provided.

As shown in FIG. 3, the cooling oil supply port 34 is attached to the oil supply ring 25, and the oil supply ring 25 is fitted with O-rings 27 and 28 to prevent the cooling oil from leaking.

The oil supply ring 25 can be rotated around the cooling cylinder 24, and by oriented the oil supply port 34 upward, no air bubbles will form inside the cooling cylinder, and the position of the oil supply port can be set in a direction that is easy to use. I can do things.

A groove 25a is provided at the center of the inner circumference of the oil supply ring 25, and the entire groove 25a is filled with cooling oil.

Filling the cooling cylinder 24 with oil 24. The hole shape may be either round or elongated.

The cooling oil is in the groove 25. Add oil 24. The magnet 1 enters the inside of the cooling cylinder 24 and cools the outer circumference of the vibrator 11.
7 and the inner wall of the vibrator 11.

At this time, the inside of the vibrator is also cooled, improving the cooling effect.

Next, the coolant passes through the oil groove 40a of the horn and into the pipe 40. and is discharged from the conduit 43a of the vibrating tool.

At this time, the horn 40 and the vibrating cutting tool 43 are cooled from inside with cooling oil.

FIG. 4 is a side view of the vibration cutting device of the present invention.

The cooling oil liquid is supplied to the supply port 34 and discharged from the vibration cutting tool 430 oil hole 43a.

FIG. 5B is a cross-sectional view of the vibrating cutting tool, with a pipe 43a in the center and a discharge port 43b that is narrower than the outer periphery.
Since the cooling effect is improved by spouting cooling oil from i, the oil supply pipe 5O-5 in the conventional structure shown in FIG.
It is particularly effective to position the discharge port 43b in the vicinity of the maximum amplitude point, since the structure is simplified since the oil filler 8a and 0a-50b are not required.

6A and 6B are a front view and a side sectional view of the blade part at the tip of the vibrating tool of the present invention, and are examples of cooling the vibrating tool 43 and the blade 44, and the conduit 43a is raised near the blade 44. This provides cooling and cutting oil effects.

7A and 7B are cross-sectional views of the joint between the vibrating horn and the vibrating cutting tool of the present invention, and when the pressure of the cooling oil is high, the discharge port 40
The vibration horn 4 will eject more cooling oil than necessary from ゜.
00 cover 41.42 prevents the cooling oil from scattering, and by selecting the distance between the cover 41.42 and the vibrating horn 400, the tip of the tJ horn 40 and the cover 41.
The vibration cutting tool 43 is filled with cooling oil between the spaces 42 and 42, dramatically improving the cooling effect and limiting the amount of ejection.
conduit 43d.

The pressure drop at the part 43b is small and the discharge amount does not decrease.Although the magnet 17 is inserted into the vibrator 11, there is a small difference between the outer diameter of the magnet 17 and the inner diameter of the vibrator 11, so the flow of the cooling oil is not smooth. In this case, it is effective to make the cross-sectional shape of the magnet 17 a double-sided convex shape 17a as shown in FIG. 8A, or to insert a groove 17b as shown in FIG. 8B.

FIG. 9 shows an example of the shape of the magnet end face, and A and C are left side views, and B is a cross-sectional view and a plan view.

Is there a groove in the shape of the end of magnet 17? 7c or hole 17d
It is effective to create a shape that allows oil to flow smoothly into the conduit 40e of the vibrating horn 40 shown in FIG. 3 by e 17 e.

Similarly, a groove 40d is formed at the joint between the vibrating horn 40 and the vibrator 11.
A similar effect can be obtained by creating .

FIG. 10 shows an embodiment of a cooling oil pipe system.

Reference numeral 51 denotes an oil tank, and the cooling oil pumped up by the pump 53 passes through a strainer 52 and then passes through a magnetic filter 5.
4. Dust and iron powder are filtered out.

The flow rate check valve 55 protects the vibration cutting device by stopping its operation as the vibration cutting device heats up when the cooling oil decreases.Next, the cooling oil is cooled by a cooler 56, enters the cooling cylinder 24, and reaches the oil pan 57. Return to oil tank 52.

As is clear from the above description, this invention improves the cooling efficiency of the vibrator, reduces the amount of cooling oil, improves the reliability of the vibration cutting device, and reduces the cost of the tool holder.

Incidentally, the present invention can be similarly used for longitudinal vibration cutting devices and the like.

[Brief explanation of drawings]

Fig. 1 is a side view for explaining a vibration cutting device, Fig. 2 is a sectional view of main parts showing a conventional vibrator cooling device, and Figs. 3 to 9 show an embodiment of the present invention. Figure 3 is a sectional view of the vibrator cooling device, Figure 4 is a side view of the vibration cutting device, and Figure 5 is a side view of the vibration cutting device.
Figure A is a front view of the vibration cutting tool, Figure 5B is a sectional view, Figure 6
Figure A is a front view of the blade of the vibrating cutting tool, Figure 6 B is a cross-sectional view of the tip of the vibrating cutting tool, Figures 7 A and B are cross-sectional views of the joint between the vibrating horn and the vibrating cutting tool, and Figure 8 A and B are front views showing the cross-sectional shape of the magnet, FIG. 9 is an example of the magnet end face shape, A is a left side view, B is a cross-sectional view, C is a hole-shaped left side view, and D is a left side view. The plan view and FIG. 10 are block diagrams showing one embodiment of a cooling oil pipe system. 8... Tool holder, 10... Vibration horn, 11... Vibrator, 13.43...
- Eyes on vibration cutting. 14.24...Cooling cylinder, 40e s 436.
...Pipe line, 40, l, 40b, 43b...
·Vent.

Claims (1)

[Scope of utility model registration request] A vibrating cutting tool fixed to a tool holder, a vibrating horn screwed to the vibrating cutting tool, a vibrator fixed to the vibrating horn, and a cooling device surrounding the vibrator and screwed to the vibrating horn. A vibration cutting device comprising a tube and cooling the vibrator with a cooling oil liquid, wherein the cooling tube has a rotatable supply port and a pipe line is provided in the longitudinal direction approximately at the center of the vibrating horn and the vibrating tool; A vibrator cooling device characterized in that a plurality of discharge ports are provided in the outer circumferential direction from the conduit.