JPH02250745A - Ultrasonic working machine - Google Patents

Abstract

PURPOSE:To constrain the attenuation of an ultrasonic wave and to make work efficient by flowing the fluid cooling an ultrasonic piezoelectric transducer and the horn transmitting an oscillated ultrasonic wave to a tool into the cover non-contact with the ultrasonic piezoelectric transducer, at least. CONSTITUTION:A working head part is composed by fitting an ultrasonic working horn 3 via a cone 2 closely fitted to an ultrasonic piezoelectric transducer 1. A tool 4 is fitted to the tip of the working horn 3. The body 8 to be worked is worked by pressing it by the tool 4 while feeding a work liquid 11 from a nozzle 10 to the body 8 to be worked which is placed on a work base 9. A cooling cover 5 is provided with non-contact around ultrasonic vibrations 11 and the cone 2, a cooling fluid is fed from a feeding pipe 6 and the ultrasonic transducer 1, cone 2 and horn are cooled. Also, the fluid forms an air curtain near a work part and work is executed under a clean atmosphere. Thus, the attenuation of the ultrasonic wave is restrained, the decrease of the work speed is prevented and the wear of a tool is reduced.

Description

[Detailed description of the invention] [Object of the invention 1 (Industrial application field) The present invention relates to an ultrasonic processing machine.

(Prior art) Ultrasonic processing machines that transmit ultrasonic waves with a frequency of approximately 20 kllz oscillated from an ultrasonic oscillator to a tool via a cone or an ultrasonic processing horn are used to process hard and brittle materials such as myceramics. It is effective for

In this ultrasonic processing machine, since the ultrasonic oscillator is significantly overheated during oscillation, conventionally, the oscillation section is provided with a cooling device to forcibly cool the ultrasonic oscillator.

(Problems to be Solved by the Invention) As described above, conventional ultrasonic processing machines have been formed with a structure that forcibly cools the ultrasonic oscillator in order to prevent the ultrasonic oscillator from overheating. It does not have a structure that cools down the heat generated by the cone and ultrasonic machining horn through the transmission of sonic vibrations. As a result, the temperature of cones and horns for ultrasonic machining rises to approximately 80'C, causing problems such as a decrease in the ultrasonic transmission speed and machining speed, and the inability to perform stable machining for long periods of time due to tool wear. be.

This invention was made to solve the above-mentioned problems, and it reduces the machining speed by forcibly cooling not only the ultrasonic oscillator (but also the horn for ultrasonic machining, which plays a large role in reducing the ultrasonic transmission speed). The purpose is to configure an ultrasonic processing machine that prevents deterioration and operates stably for a long time.

[Structure of the Invention] (Means for Solving the Problem) In an ultrasonic processing machine, at least an ultrasonic wave of an ultrasonic oscillator and an ultrasonic machining horn that transmits the ultrasonic waves oscillated from the ultrasonic oscillator to a tool are provided. A cooling cover was provided to cover the oscillator side in a non-contact manner, and the structure was such that the oscillator was cooled by fluid supplied from the cooling fluid supply section.

(Function) If a cooling cover is provided to cover at least the ultrasonic oscillator side of the ultrasonic oscillator and the horn for ultrasonic machining in a non-contact manner as described above to cool it, not only the ultrasonic oscillator but also the ultrasonic It is possible to reduce the temperature rise of the operating horn, prevent a decrease in ultrasonic transmission speed, prevent a decrease in processing speed, and provide an ultrasonic processing machine that operates stably for a long time.

(Example) Hereinafter, the present invention will be described based on an example with reference to the drawings.

The drawing shows a processing head portion of an ultrasonic processing machine, which is an embodiment of the present invention. This processing head section consists of an ultrasonic transducer (1) that oscillates ultrasonic waves, a cone (2) attached closely to this ultrasonic transducer (1), and an ultrasonic transducer integrated with this cone (2). A horn for sonic processing (3) is provided. The ultrasonic machining horn (3) is designed to effectively focus the ultrasonic vibrations from the ultrasonic vibrator (1) to the tip via the cone (2). It is formed into a conical shape with a small diameter, and a processing tool (4) is attached to its tip.

Furthermore, the processing head in this example includes an ultrasonic vibrator (1
) to the outside of the ultrasonic machining horn (3) up to the large diameter portion of the cone (2) side, and a cooling cover (5) is provided to cover them in a non-contact manner.

The cooling cover (5) is connected to a cooling fluid supply unit (not shown) that supplies a cooling fluid such as air to the inside of the cooling cover (5) through the supply pipe (6). )
The cooling fluid supplied through the ultrasonic machining horn (
3) and the cooling cover (5) toward the tool (4), and the ultrasonic vibrator (1) is discharged when the machining head is operating.
The structure is such that the heat generated by the cone (2) and the ultrasonic machining horn (3) is cooled.

In the drawings, (8) is a workpiece, (9) is a processing table that holds the workpiece, and (10) is a nozzle that supplies processing liquid (11) to the processing section of the workpiece.

Machining is carried out by holding the workpiece (8) on the processing table (9) and supplying the processing liquid (11) to the processing section from the nozzle (lO). tool(
4) is performed by pressing.

By the way, as mentioned above, there is a cooling cover (
5) and supplying cooling fluid to it, not only does the ultrasonic vibrator (1) generate heat during operation, but also the cone (2) and the ultrasonic machining horn ( 3) is also cooled and transmitted to the tool (4) without reducing the ultrasonic transmission speed to prevent a decrease in machining speed,
In addition, it is possible to provide an ultrasonic processing machine that can stably operate for a long time with less wear on the tool (4). Furthermore, processing costs can also be reduced. Furthermore, as mentioned above, the cooling cover (5
), the fluid passing through the inside is discharged from the gap between the ultrasonic machining horn (3) and the cooling cover (5), and the discharged fluid acts as an air curtain against the workpiece (8). The workpiece (8) can be processed in a clean atmosphere.

In the above embodiment, the ultrasonic vibrator, the cone, and the horn for ultrasonic machining are cooled by the cooling fluid supplied from the cooling fluid supply section. In particular, for ultrasonic transducers that generate a large amount of heat, cooling, for example, by water cooling may be used in combination.

[Effect of the invention] A non-contact cooling cover covers the area from the ultrasonic oscillator of the ultrasonic machining head to at least the ultrasonic oscillator side of the ultrasonic application horn that transmits ultrasonic waves to the tool, and the cooling fluid supply section Since the structure is cooled with fluid supplied from the ultrasonic oscillator, the ultrasonic waves emitted from the ultrasonic oscillator can be transmitted to the ultrasonic application horn without attenuation, and the ultrasonic wave can be transmitted to the ultrasonic application horn without attenuation. It also reduces temperature rise, prevents a decrease in ultrasonic transmission speed, eliminates a decrease in machining speed, and reduces tool wear, making it possible to create an ultrasonic machining machine that operates stably for a long time, while reducing machining costs. can be reduced.

[Brief explanation of drawings]

The drawing is a diagram showing the structure of a processing head portion of an ultrasonic processing machine which is an embodiment of the present invention. 1... Ultrasonic oscillator 2... Cone 3... Ultrasonic application horn 4... Tool 5... Cooling cover 8...
・Representative for workpiece Patent attorney Norio Ogo■, Minor case display 2, 1999 formal application for patent ultrasonic processing machine (method) for amendment of name of invention % formula % 5, Date of amendment order June 1999 July 12, 1999 (all date: July 4, 1999) 6, Subject of amendment (1) Brief description of drawings in the specification (2) Drawing 7, Contents of amendment (1) Page 7 of the specification In the 6th line, “Drawings should include the description of J.”
Figure 1 is corrected. (2) The drawings attached to the specification are corrected as shown in the attached sheet. 3. Relationship with the case of the person making the amendment Patent applicant (307) Toshiba Corporation 4, Agent 4-41-11 Kamata, Ota-ku, Tokyo 144

Claims (1)

[Claims] an ultrasonic oscillator, an ultrasonic application horn that transmits the ultrasonic waves oscillated from the ultrasonic oscillator to the tool, and a cooling fluid that supplies fluid to cool the ultrasonic oscillator and the ultrasonic application horn. An ultrasonic processing machine characterized by comprising a cooling cover connected to a supply section and covering at least the ultrasonic oscillator side of the ultrasonic oscillator and the ultrasonic application horn in a non-contact manner.