JPH01103254A - Both surface supersonic wave vibration grinder - Google Patents

Abstract

PURPOSE:To efficiently grind-work the upper and lower surfaces of a highly brittle material such as ceramics free from the generation of crack by installing a supersonic wave vibration generator in a grinding plate revolving drive part. CONSTITUTION:The driving shaft 4 of a grinding plate 1 is revolution-driven by a rotary motor 7 in a grinding plate revolving drive part, and the upper and lower surfaces of a ceramics are ground-worked at the same time by the upper and lower grinding plates 1 in pairs. In this case, electricity is supplied into a supersonic wave vibrator 9 installed onto the rotary shaft 4 through a slip ring 10, and the supersonic wave vibration is applied onto the rotary shaft 4 by the vibrator 9. Therefore, the grinding efficiency in the both surface working for ceramics can be improved two-three folds by applying the supersonic wave vibration onto a pair of grinding plates 1 in revolution.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a highly efficient and highly accurate grinding machine that simultaneously grinds both the upper and lower surfaces of a highly brittle material.

(Conventional technology) Equipment that simultaneously grinds both the upper and lower surfaces of highly brittle materials is
Using the equipment conventionally used for processing metal materials, etc.,
A grindstone suitable for highly brittle materials was selected and used in the car.

(Problems to be Solved by the Invention) Highly brittle materials such as ceramics are hard and brittle materials that are difficult to grind and have extremely low processing efficiency. In addition, when attempting to increase processing efficiency, there is a contradiction in that surface accuracy, such as surface roughness and flatness, is impaired, and there are also problems such as fine racks being generated.

The present invention was developed in view of the above-mentioned circumstances, and an object of the present invention is to provide a double-head grinding device that has high processing efficiency and processing accuracy that is equal to or higher than conventional devices.

(Means for Solving the Problems) The present invention was developed to solve the above problems, and is a grinding machine that simultaneously grinds both the upper and lower parallel surfaces of a highly brittle material. Its technical feature is that an ultrasonic vibration generator is attached to the shaft.

(Function) The present invention is a processing machine used for grinding highly brittle materials, and grinds the upper and lower surfaces of a workpiece while applying ultrasonic vibrations. By applying this ultrasonic vibration, the machining efficiency increases 3 to 5 times compared to conventional methods, and highly brittle materials can be ground without compromising surface accuracy or causing racks in highly brittle materials. Something comes up.

(Example) The present invention will be explained in detail below using examples.

FIG. 1 is a front vertical sectional view of a grinding machine according to an embodiment of the present invention.

In Fig. 1, the grinding plates l facing each other are 1
It rotates in a horizontal plane supported by a rotary drive unit 2 that is freely movable downward, and a workpiece to be ground is inserted between the two surfaces of the upper and lower grinding plates 1, and both the upper and lower surfaces of the workpiece are ground.

The vertical movement of the rotary drive unit can be changed arbitrarily by operating the worm 12 and worm wheel 13 by a motor (not shown), and the interval between the grinding plates l is automatically adjusted precisely according to the dimensions of the upper and lower surfaces of the workpiece. controlled by.

A longitudinal cross-sectional view of one embodiment of the rotation drive section 2 is shown in FIG.

A drive shaft 4 is built into the casing 3, and the drive shaft 4 is provided with a rotary motor 7 consisting of a rotor 5 and a stator 6, which is supported by a bearing 8 and rotates the grinding plate 1. a to rotation drive #2? A 7-wave vibration generator is installed.

As this ultrasonic vibration generator, an ultrasonic vibrator 9 is attached to the rotating shaft 4, and is supplied with power via a slip ring IO. The ultrasonic vibrator 9 generates ultrasonic vibrations and applies the ultrasonic vibrations to the rotating shaft 4. The ultrasonic transducer 9 may be a device that generates longitudinal vibrations or a device that generates rotational vibrations. The frequency of ultrasonic vibration is approximately 20kHz
z is appropriate. It is also optional to change the frequency and/or phase of the ultrasonic vibrations imparted to the upper and lower rotation drive units.

The workpiece 21 is attached to the holding port g122 and fed between the two grinding plates l, where it is ground. The holding disk 22 is rotatably held by a frame 23 and can be rotated by a motor 25 about a shaft 24 .

The frame 23 is supported by a horizontally rotatable arm 26 by means of a vertical pin joint 27. As shown in FIG. 3, which is a plan view explaining the entire embodiment, the workpiece mounting position R
At 30, the workpiece 21 is attached to the workpiece holding disc 23, and is rotated about the pin 27 as shown by the arrow 32 to move to the holding position shown at the grinding position 5!3I. The workpiece 21 thus held is fed between the two grinding plates l. Rotate the holding port g122 as necessary. When the grinding process is completed, the frame 23 is returned to the workpiece mounting position 30 and a new workpiece 21 is mounted on the holding disk 22.

The double-headed ultrasonic vibration grinding machine of this example increases processing efficiency by 3 to 5 times compared to conventional methods when grinding two parallel surfaces of highly brittle workpieces by applying ultrasonic vibration to the two upper and lower grinding plates. did.

[Effects of the Invention] Since the present invention is configured as described above, the grinding efficiency of highly brittle materials is dramatically improved, and the grinding efficiency of grinding highly brittle materials is improved dramatically, and the grinding of parallel surfaces of ceramics, etc. Grinding has become extremely easy.

[Brief explanation of the drawing]

Fig. 1 is a front vertical cross-sectional view of a grinding machine according to an embodiment of the present invention;
The figure is a longitudinal cross-sectional view of the rotary drive section, and FIG. 3 is its overall plan view.
Casing 4... Drive shaft 5... Rotor
6... Stator 7... Rotating motor 8...
Bearing 9...Ultrasonic vibrator 21...Work 22.
・・Holding disk 23 ・Frame 24 ・・shaft
25...Motor 26...Arm
27...Pin 30...Workpiece mounting position

Claims (1)

[Claims] 1. A double-headed ultrasonic vibration grinding machine that simultaneously grinds both the upper and lower surfaces of a workpiece, and is characterized in that an ultrasonic vibration generator is attached to each of the grinding plate rotation drive parts of the double-headed grinder.