JPS5820749B2 - automatic grinding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic grinding device, and an object of the present invention is to enable grinding of a branch pipe attachment portion of a heat exchanger to be carried out extremely easily and efficiently while requiring posture control of a grindstone. purpose.

The present invention will be described below based on drawings showing an example of implementation.

In the figure, reference numeral 1 denotes an arm that is moved up and down in a horizontal state by a hydraulic cylinder 2, and a grindstone mounting box 3 is attached to the tip of this arm 1.

A rotary disk 5 is provided at the lower end of the box 3 and rotates around an axis 4 perpendicular to the box 3 .

6 is a worm wheel mounted on the vertical axis 4 in the box 3 on the rotary disc 5 in order to rotate the rotary disc 5; 7 is a worm that meshes with the worm wheel 6; One end of is connected to the motor 8.

Incidentally, a threaded rod 10 is provided on the lower surface of the rotary disk 5 to be rotated around a horizontal axis by a motor 9, and the threaded rod 10 is used to change the attitude of the grindstone 11 around the horizontal axis 120. A female screw body 14 attached to the upper end of the motor 13 is screwed together.

Accordingly, the motor 13 can be moved along the groove 15 in the direction of arrow A in FIG.

A force detector 16 is pivotally connected to the lower end of the motor 13 about the horizontal axis 12, and a compression spring 16a is provided inside the detector 16.

Reference numeral 17 denotes a grindstone rotating motor attached to the lower end of the force detector 16, and the grindstone 11 is attached to the horizontal rotating shaft 18 of this motor 17.

19 is a posture detector attached to the grindstone 11.

The automatic grinding device thus constructed is used to grind, for example, the attachment portion of the branch pipe 21 of the heat exchanger 20, as shown in FIG. 2, and its operation will be explained next.

First, the entire apparatus is moved to position the grindstone 11 within the heat exchanger 20 above the branch pipe 21 that protrudes below the heat exchanger 20.

At this time, the vertical axis 4 of the rotary disk 5 is positioned at the center of the branch pipe 21.

Thereafter, the arm 1 is lowered by the hydraulic cylinder 2 to bring the grindstone 11 into contact with the upper end of the branch pipe 21.

In this state, the rotary disk 5 is rotated by the motor 8 via the worm 7 and the worm wheel 6, and the grinding wheel 11 is rotated by the motor 8.
is rotated along the circumference of the branch pipe 21, and the grindstone 11 is rotated for grinding by the motor 17.

The position of the grindstone 11 corresponding to the radius of the branch pipe 21 is adjusted by rotating the threaded rod 10 by the motor 9 and moving the female threaded body 14.

By the way, if there is a vertical positional fluctuation on the surface to be ground, that is, the upper end of the branch pipe 21, force is applied to the upward force detector 16 of the grinding wheel 11 during grinding, and this signal is transmitted to the servo amplifier 22 and servo valve shown in FIG. 23 to the hydraulic cylinder 2, and the arm 1 is moved up and down by the hydraulic cylinder 2, thereby making it possible to equalize the force applied to the grindstone 11 from the branch pipe 21.

Also, during grinding, if the surface to be ground is tilted with respect to the horizontal, the attitude detector 19 operates and sends the signal to the motor 13 via the servo amplifier 24 shown in FIG. The whetstone 11 is rotated around the axis 12.
This allows the material to be correctly oriented toward the surface to be ground.

When controlled by the motor 13, the motor 19 may be operated in conjunction with the motor 13 to correct the positional error of the grindstone 11 in the direction r in FIG. 3 via the threaded rod 10 and the female threaded body 14.

The automatic grinding device of the present invention can be implemented as described above, and as described above, the grinding wheel is operated according to the shape of the branch pipe, and the grinding wheel is brought into contact with the branch pipe with a constant force. Grinding can be done on the fly, and the work can be done automatically and efficiently.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, and FIG. 1 is a schematic perspective view, FIG. 2 is a side view showing a grinding state, and FIG. 3 is an enlarged sectional view of the main part. 1...Arm, 2...Hydraulic cylinder,
3...Box, 4...Vertical axis, 5
...Rotary disk, 9...Motor, 10.
...Threaded rod, 11... Grindstone, 12...
...Horizontal axis, 13...Motor, 14...
...Female screw body, 16...Force detector, 16a
... Spring, 17 ... Motor, 19.
... Attitude detector, 20 ... Heat exchanger, 2
1...branch pipe, 22...servo amplifier,
23... Servo valve, 24... Servo amplifier.

Claims (1)

[Claims] 1. A rotary disk that rotates around a vertical axis is provided at the tip of an arm that can be moved up and down in a horizontal state by a hydraulic cylinder, and a grindstone that rotates around a horizontal axis is installed below this rotary disk, A means for moving this grindstone in the radial direction of the rotary disk is provided, a force detector is provided to detect the force applied to the grindstone depending on the vertical position of the object to be ground, and sends a signal to operate the hydraulic cylinder, and furthermore, a force detector is provided to control the attitude of the grindstone. An automatic grinding device characterized in that a grinding wheel is brought into contact with a workpiece to be ground with a constant force, and grinding is performed while performing a tracing operation.