JPS6377655A - Polishing device - Google Patents

Abstract

PURPOSE:To perform uniform polishing on a complex surface by fitting multiple polishing bodies to a drive shaft via elastic bodies respectively, detecting deflection, and changing the deflection condition with mechanism bodies provided on the elastic bodies so that the contact pressure on each polishing surface becomes a preset value. CONSTITUTION:Multiple polishing bodies 6 polishing the inner surface of an object to be polished are fitted to a drive shaft via spring materials 7 respectively. A strain gauge 8 is stuck to the spring material 7, and the polishing surface pressure of each polishing body 6 is detected indirectly. This polishing surface pressure is converted into the voltage and outputted to a control device 4, a drive command is outputted to an actuator 10 by the difference between this voltage and the predetermined value, and a base type cam 11 is pushed below the spring material 7 to keep the pressure on the polishing surface at a preset value. Accordingly, even the surface having a complex shape can be made a uniformly polished surface simply.

Description

[Detailed description of the invention] This relates to polishing equipment.

[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. was there.

[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 requiring the conventional effort to memorize the surface shape once.

[Means for solving problems]

According to the present invention, a plurality of abrasive bodies (6)'e and nine elastic members (7)' are used to polish the surface of an object. il- attached to the drive shaft (2) through each of the elastic members,
A sensor (8) that detects the deflection is attached to a mechanism (10) that can change the deflection state of each elastic material.
and 11) are provided for each of the elastic materials, and receive the output of the sensor during the time when each polishing body is in contact with and polishing the object.

The mechanical body? A polishing apparatus is obtained which is characterized in that it has a control device (4) for controlling the polishing apparatus.

That is, in the present invention, a sensor is provided on the slope of the elastic member 7 in order to individually detect the polishing surface pressure of the polishing body, and the mechanism is controlled by a control device that receives the sensor output. is characterized in that the pressure on each polishing surface of each polishing body is maintained at a predetermined value by individually operating the elastic members.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 6 is a diagram showing a polishing apparatus according to an embodiment of the present invention. FIG. 6 shows an example in which the present polishing apparatus polishes the inner surface of a cylinder-shaped object to be polished 5, and numeral 1 denotes a polishing section which will be described later with reference to FIGS. 1 and 2.

The polishing section 1 is supported and driven by a drive shaft 2 of a drive device B which is controlled by a control device 4. The polishing section 1 can perform rotational interlocking and linear movement in the axial direction. Moreover, the drive device 5
By making the part movable in the vertical direction, it is possible to follow large changes in shape that cannot be handled by the mechanism within the polishing part alone.

Details of polishing section 1? Shown in FIGS. 1 and 2.

Referring to FIGS. 1 and 2, 6 is a polishing body, which corresponds to a grindstone in the case of polishing with fixed abrasive grains.

Polishing using free abrasive grains, such as lapping, corresponds to lapping. 7 is a spring material with a large Pamph constant (i.e., 2 elastic materials) that supports the polishing body 6, and a strain gauge 8 (this gauge detects the deflection of each elastic body 7) is attached to this spring material 7. The polishing surface pressure of each polishing body 6 is indirectly detected by a sensor (corresponding to a sensor) and output to the control device 4.

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, only when the rotation angle is at which each n polishing body 6 is actually polishing. Make it detectable. 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. 6, for example, when the polishing section 1 moves from A to B in FIG. 6, the pressure on the polishing surface decreases.
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 of the converted voltage source from a predetermined value and issues a drive command to the actuator 10.

Push the trapezoidal cam 11 under the spring material 7.

Maintain the polishing surface pressure at a specified value. Since each polishing body is detected and driven independently, it is safe even in cases where uneven wear occurs even if the polishing bodies are first dressed to have a uniform shape.

〔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., if you offset the rotation axis of the polishing part from the center of the object to be polished and rotate the object slowly, the cross-sectional shape will not be circular and the radius will differ depending on the location. It can be easily polished even in shapes like this.

[Brief explanation of the drawing]

FIGS. 1 and 2 are diagrams showing one example of the use of the present invention. 1: Polishing section, 2: Axis, 6: Drive device, 4: Control device, 5
: Polished object, 6: Polishing body, 7: Bar stock, 8 Ni strain gauge, 9: Damper. 10 near actuator, 11: trapezoidal cam.

Claims (1)

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