JPS6246536Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a grinder that grinds the surface of a workpiece by rotating a grinding tool at high speed.

In recent years, attempts have been made to attach a grinder to an industrial robot and automatically grind the surface of the workpiece. When using this method to remove burrs from castings, the external dimensions of the castings vary and the grinding tool wears out, so burrs are often removed too much or left uncut.

The present invention was developed in view of the above circumstances, and can absorb deviations due to variations in the external dimensions of the workpiece and wear and tear of the grinding tool. The purpose is to provide a grinder. Hereinafter, one embodiment of the present invention will be described in detail based on the drawings. Reference numeral 1 denotes a cylindrical casing oriented in the vertical direction, which has flanges projecting inward at both upper and lower ends, and is configured so that it can be divided into left and right parts from the middle.

A mounting portion 2 is integrally provided on the outer surface of the body of the casing 1 in a protruding manner. Further, inside the casing 1, as shown in FIG. A bearing case 4 is mounted concentrically with the casing 1. As shown in FIG. 1, the bearing case 4 extends vertically and passes through the casing 1, and an annular gap 5, 5 is formed between the bearing case 4 and the flange of the casing 1. Further, a rotating shaft 6 oriented in the vertical direction is rotatably provided in the bearing case 4 via bearings 7 and 8.
The output shaft of an air motor 9 mounted on the upper end is connected, and an inverted conical grindstone 10 is attached to the lower end via a chuck 11. 12 is a bearing holder screwed onto the lower end of the bearing case 4.

The device configured as described above is attached to an industrial robot (not shown) that is taught to move along the contour where burrs occur in the casting, and the grinding wheel 10 is perpendicular to the burr of the casting (not shown). After pressing the whetstone 10 against the surface of the casting with burrs in this manner, the air motor 9 is driven to rotate the whetstone 10 via the rotating shaft 6 and the robot is operated, so that the whetstone 10 rotates and follows the contour of the casting. be moved. In this case, whetstone 1
0. Since the bearing case 4, air motor 9, etc. are elastically supported by the spiral leaf spring 3, and the grinding wheel 10 is pressed against the casting surface by the repulsive force of the leaf spring 3, the grinding wheel 10 is The grinding wheel 10 is moved in the direction of the casting in response to variations in external dimensions of the casting and deviations due to wear of the grinding wheel 10, and is constantly in contact with the surface of the casting with a nearly constant force. It is moved along the contour of the casting while absorbing accurately and scraping off burrs.

In the above embodiment, the rotating shaft 6 is rotated by the air motor 9, but an electric motor may also be used.

Further, the grindstone 10 may be another grinding tool such as a file. Further, the bearing case 4, the grinding wheel 10, etc. are supported by the leaf spring 3 at the inner end thereof.
It may be attached to the outer end of the Furthermore, this device may be used by pointing in any direction within 360 degrees.

As is clear from the above description, the present invention has a rotating means for rotating the grinding tool attached to one end of a spiral leaf spring, so that the grinding tool can be displaced in a direction perpendicular to the pointing direction of the spiral leaf spring. Because this is a grinder that has been designed to be used as a grinder, when this grinder is attached to the industrial robot that has been taught and grinding work is performed, the grinding tool will be shifted appropriately in response to variations in the external dimensions of the workpiece and deviations due to wear and tear on the grinding tool. Therefore, it has excellent practical effects such as absorbing the deviation and preventing over-cutting such as burrs and the occurrence of uncut parts.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially sectional front view, and FIG. 2 is a sectional view taken from A to A in FIG. 1. 3... Leaf spring, 4... Bearing case, 6...
...rotating shaft, 9...air motor, 10...grindstone.

Claims (1)

[Scope of utility model registration request] In a grinder that grinds the surface of a workpiece by rotating a grinding tool, a rotating means for holding and rotating the grinding tool is attached to one end of a spiral leaf spring so that the grinding tool is oriented substantially perpendicular to the direction of the grinding tool. A grinder characterized in that it is configured to be able to shift in a direction.