JPH0440153B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a surface polishing device, and particularly to an automatic polishing device.

[Conventional technology]

With conventional automatic polishing equipment, when polishing a surface with a complex shape such as undulations, it is necessary to memorize the surface shape in advance in the control device in order to move the polishing part along the polishing surface. Ta.

[Problem that the invention seeks to solve]

SUMMARY OF THE INVENTION An object of the present invention is to provide a polishing device that can obtain a precisely polished surface with simple operations without the need to memorize the surface shape as in the past.

[Means for solving problems]

According to the present invention, a plurality of polishing bodies 6 for polishing the surface of an object are each attached to the drive shaft 2 via an elastic member 7, and a sensor 8 for detecting the deflection of each of the elastic members is provided. Mechanisms (10 and 11) capable of changing the deflection state of each elastic material are provided for each of the elastic materials, and each polishing body contacts the object to polish the sensor. There is obtained a polishing apparatus characterized in that it has a control device 4 which receives the output and controls the mechanism so that the pressure on each polishing surface of each polishing body is maintained at a predetermined value.

That is, in the present invention, in order to individually detect the polishing surface pressure of the polishing body, a sensor is provided in each of the elastic members 7, and a mechanism controlled by a control device that receives the outputs of these sensors detects the pressure of the polishing surface of the polishing body. It is characterized in that each polishing surface pressure of each polishing body is maintained at a predetermined value by individual operation.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 3 is a diagram showing a polishing apparatus according to an embodiment of the present invention. FIG. 3 shows an example of polishing the inner surface of a cylinder-shaped object 5 to be polished using this polishing apparatus.
is supported and driven by a drive shaft 2 of a drive device 3 controlled by a control device 4. Polishing part 1
can perform rotational motion and axial linear motion. or,
By making the driving device 3 movable in the vertical direction, it is possible to follow large changes in shape that cannot be handled by the mechanism within the polishing section alone.

Details of the polishing section 1 are shown in FIGS. 1 and 2. With reference to FIGS. 1 and 2, 6 is a polishing body,
In the case of polishing with fixed abrasive grains, it corresponds to a grindstone, and in the case of polishing with free abrasive grains such as lapping, it corresponds to a lapping. 7 is a spring material with a large spring constant (i.e., an elastic material) supporting the polishing body 6;
A strain gauge 8 attached to this spring material 7 (this corresponds to a sensor that detects the deflection of each elastic body 7) indirectly detects the polishing surface pressure of each polishing body 6 and outputs it to the control device 4. do. Since the polishing body 6 performs polishing intermittently, the pressure on its polishing surface also fluctuates, so while constantly reading the rotation angle of the shaft 2, it is detected only when the rotation angle is at which each polishing body 6 is actually polishing. Do it like this. 9 is a damper for preventing the spring material from vibrating due to intermittent polishing. If the inner surface of the object to be polished 5 is undulating as shown in FIG.
When the is moved, the pressure on the polishing surface decreases, and the strain gauge 8 attached to the spring material 7 is deformed. This deformation is converted into a change in voltage by constructing a bridge circuit, and the control device 4 calculates the difference between the converted voltage value and a predetermined value, issues a drive command to the actuator 10, and sends a drive command to the trapezoidal cam 11. is pushed under the spring material 7 to maintain the polishing surface pressure at a predetermined value. Since each abrasive body is detected and driven independently, it is safe even if the abrasive body is first dressed into a uniform shape, but uneven wear occurs.

〔Effect of the invention〕

As described above, according to the present invention, even surfaces with complex shapes that are difficult to measure can be easily polished using a polishing device that has a mechanism that allows polishing while maintaining the pressure on the polishing surface of each polishing body at a predetermined value. A uniformly polished surface can be obtained. When polishing the inner surface of a cylinder, etc., offset the rotating shaft of the polishing section from the center of the object to be polished.
If the object to be polished is rotated slowly, it can be easily polished even if the cross-sectional shape is not circular and the radius differs depending on the location.

[Brief explanation of drawings]

1 and 2 are a sectional view and a side view, respectively, of an apparatus for polishing the inner surface of a cylindrical object according to an embodiment of the present invention, and FIG. 3 is a diagram showing an example of use of the polishing apparatus of FIG. 1. be. 1... Polishing section, 2... Shaft, 3... Drive device, 4
...control device, 5 ... object to be polished, 6 ... polishing body,
7... Spring material, 8... Strain gauge, 9...
Damper, 10... Actuator, 11...
Trapezoidal cam.

Claims (1)

[Claims] 1. A plurality of abrasive bodies for polishing the surface of an object are each attached to a drive shaft via an elastic material, a sensor is attached to each of the elastic materials to detect the deflection, and the state of deflection of each elastic material is measured. A mechanism that can be changed is provided for each of the elastic materials,
Control for controlling the mechanical body so that the pressure on each polishing surface of each polishing body is maintained at a predetermined value based on the output of the sensor during the time when each polishing body is in contact with and polishing the object. A polishing device comprising a polishing device.