JPH0230463A - Ultrasonic polishing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an ultrasonic polishing device used for polishing the surface of a member made by machining, cutting, etc.

[Prior Art] Conventionally, there are various methods such as an abrasive processing method using abrasive grains for polishing, injection processing such as shot peening, and barrel polishing.

[Problems to be Solved by the Invention] However, when polishing is required on the inner edge of a workpiece with a complex and detailed shape, polishing is extremely difficult and sometimes has to be done manually using sandpaper. I didn't get it. Further, when arranging the workpieces, there is a problem in that the arrangement etc. must be taken into consideration.

The present invention has been made to solve the above-mentioned problems, and even if polishing is required for the inner edge of a workpiece with a complex and fine shape, it can easily arrange the workpiece, etc. It is an object of the present invention to provide an ultrasonic polishing device that can be arbitrarily placed in a container without considering the above, and can reliably perform surface polishing.

[Means for Solving the Problems] In order to achieve this object, the present invention has been made, and includes a container for storing a workpiece immersed in a liquid, and an ultrasonic energy applied to the liquid in the container. The apparatus includes an ultrasonic generating means for applying ultrasonic waves, a sealing means for keeping the inside of the container in an airtight state, and a pressurizing means for increasing the internal pressure of the container.

[Function] With the above-described configuration, the present invention accommodates the workpiece so as to be directly immersed in the liquid in the container, and in this state, the internal pressure is increased, and pressure is applied to the air contained in the liquid to remove air bubbles. . Therefore, the cavitation threshold becomes higher and
When ultrasonic energy is applied to the liquid in this state, cavitation is generated and ruptured with high energy, resulting in a high erosion effect. Therefore, surface polishing can be effectively performed, and even if the workpiece is a member with a complicated shape, the inner edge etc. of the workpiece can be polished easily and reliably in a short time.

[Example 1] Hereinafter, an example embodying the present invention will be described with reference to the drawings.

A container 1 of this ultrasonic polishing apparatus is formed into a substantially box shape with an open top surface, and a flange 2 is provided protruding from the outer periphery of the top end. In this container 1, for example, a plurality of workpieces 3 that require surface polishing after electrical discharge machining are housed, and a liquid 4 for surface polishing is also housed. immersed in Incidentally, as the liquid 4 for surface polishing, a water wheel or a suspension obtained by mixing an appropriate amount of abrasive material with water is used.

The lid 5 is mounted on the flange 2 of the container 1 via a gasket 6 so as to cover the upper opening of the container 1 in an openable and closable manner. A plurality of fasteners 7, which constitute a sealing means together with the lid 5 and the gasket 6, are attached so that the lid 5 spans the outer peripheral edge and the flange 2 of the container 1 (=1), and the lid 5 is tightened by the port 8. 5 is brought into close contact with the upper surface of the container to maintain the inside of the container 1 in an airtight state.

The ultrasonic vibrator 9 constituting the ultrasonic generating means is connected to the liquid 4.
It is attached to the lower surface of the lid 5 so as to be immersed in the container, and is connected to an ultrasonic oscillator 10 provided outside the container. Then, as the ultrasonic oscillator 10 operates, ultrasonic waves are generated from the ultrasonic transducer 9, and the ultrasonic energy is applied to the liquid 4.

An air intake port 11 is formed in the lid 5, and is connected to an air compressor 13 as a pressurizing means via an air pressure regulating valve 2. Then, a predetermined amount of air is supplied from the air compressor 13 into the container according to the pressure adjustment of the air pressure regulating valve 2, and the inside of the container 1 is maintained at a predetermined pressure of, for example, about 5 kgf/am2. Ru.

The present embodiment is constructed as described above, and its operation will be explained next.

When polishing a workpiece that requires surface polishing, the workpiece 3 is housed in a container 1 and a polishing liquid 4 is placed inside the container 1.
is supplied into the container 1 to immerse the workpiece 3 in the liquid 4. Thereafter, the lid 5 is placed on top of the container via the packing 6,
The lid body 5 is brought into close contact with the upper surface of the container by a plurality of fasteners 7 to make the inside of the container 1 airtight. Then, the air pressure regulating valve 12 is adjusted to supply air from the air compressor 13 into the container 1 to increase the internal pressure of the container 1 to a predetermined value.

When the ultrasonic oscillator 10 is operated in this state, ultrasonic waves are generated from the ultrasonic vibrator 9, and the entire liquid 4 is ultrasonically vibrated. Then, a straight flow is generated in the direction in which the ultrasonic waves travel. Separately, the effects of cavitation generation and rupture based on this ultrasonic vibration, and the vibration of the bubbles generated by the cavitation, create a small flow near objects placed in the liquid, such as abrasive materials, etc. It has the function of promoting the flow of water.

Therefore, even if it is necessary to polish the inner edge of a workpiece with a complex shape, the surface that requires polishing is
If you touch it, it will definitely be polished.

At this time, since the inside of the container 1 is in a pressurized state, pressure is applied to the liquid containing air, which removes air bubbles and increases the cavitation threshold. Therefore, the energy of cavitation generation and rupture is greater than that under normal pressure, and the straight flow and flow in the liquid are also intensified, promoting the flow of the abrasive, etc., making surface polishing easier, faster, and more reliable. Can be polished. Moreover, surface polishing can be performed simply by arbitrarily arranging the workpieces 3 in the container 1 without considering the arrangement of the workpieces 3, and the work efficiency can be improved.

Furthermore, since the workpiece 3 is immersed in the liquid 4, the surface of the workpiece 3 can be cleaned and finished at the same time as polishing, and finishing treatment after surface polishing can be omitted.

Note that the present invention is not limited to the configuration of the above-mentioned embodiments, and various parts may be modified without departing from the spirit of the present invention, such as a configuration in which ultrasonic vibrations are applied to the liquid 4 through a container. It is also possible to change and embody it as desired.

[Effects of the Invention] As is clear from the detailed description above, according to the present invention, when it is necessary to polish the inner edge of a workpiece having a complex shape, the surface can be polished easily and in a short time. It has an excellent effect in that it can be removed quickly.

[Brief explanation of the drawing]

The drawing is a sectional view showing an embodiment embodying the present invention. In the figure, 1 is a container, 2 is a flange, 3 is a workpiece, 4 is a liquid, 5 is a lid, 6 is a packing, 7 is a fastener that constitutes a sealing means together with the lid and the packing, and 8 is a bolt. , 9 is an ultrasonic vibrator as ultrasonic generating means, 10 is an ultrasonic oscillator, 11 is an air intake port, and 12 is an air pressure regulating valve.

Claims (1)

[Claims] 1. A container (1) containing a workpiece (3) immersed in a liquid (4), and applying ultrasonic energy to the liquid (4) in the container (1). an ultrasonic generating means (9) for keeping the inside of the container (1) airtight; Pressure means (
13) An ultrasonic polishing device comprising: