JPH0938862A - Grinding/polishing/cleaning material projecting method by centrifugal grinding/polishing/cleaning material projecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To project evenly to an object to be processed by moving a center position in a projecting area of a grinding/polishing/cleaning material within a prescribed area during one grinding/polishing/cleaning step. SOLUTION: A control gage actuation mechanism 2 comprises an electric cylinder 21 arranged for vertical movement through a supporting member 20 and an adjusting member 22 fixed in a tip of a piston rod of the electric cylinder 21 by a spring and coupled with a cylindrical member 8 by a pin. The control gage is provided in such manner that it is rotated reciprocatingly through the cylindrical member 8 by expansion actuating of the electric cylinder 21. A center position of a projecting area of a grinding/polishing/cleaning material is reciprocally moved within a prescribed area at a rate of 2/minute by turning an impeller to one direction to project the grinding/polishing/cleaning material and actuating expansion of the electric cylinder 21 of the control gage actuation mechanism 2 during one grinding/polishing/cleaning step.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a centrifugal abrasive cleaning material projecting device for projecting abrasive cleaning material by applying centrifugal force to the abrasive cleaning material by rotating an impeller. The present invention relates to the improvement of the projection method of the abrasive material in the abrasive cleaning method.

[0002]

2. Description of the Related Art Conventionally, when a workpiece is batch-cleaned using a polishing equipment equipped with a centrifugal polishing material projection device, as disclosed in JP-A-56-119373, A method has been proposed in which, during one polishing step, the impeller is rotated in the forward direction for a predetermined time and then rotated in the reverse direction so that the polishing material is uniformly projected onto the article to be processed.

[0003]

However, in the polishing / blasting material projection method in which the impeller is rotated in the normal and reverse directions as described above, compared with the case where the impeller is rotated in one direction, which is generally used in the past, the polishing / cleaning material is surely removed. The center position of the material projection area occurs at two positions, and the abrasive material is projected more evenly on the workpiece, but the impeller rotation is temporarily stopped when the impeller rotation is changed. Must be stopped (0.
5 to 1.5 minutes), and as a result, new problems such as a longer time required for the blasting treatment occur. The present invention has been made in view of the above circumstances, and an object thereof is to carry out polishing with a centrifugal abrasive cleaning material projection device capable of projecting the abrasive cleaning material more uniformly onto the object to be treated. It is to provide a material projection method.

[0004]

In order to achieve the above object, a method of controlling a polishing / blasting material projection area in a centrifugal type polishing / polishing material projection apparatus according to the present invention is to apply a centrifugal force to the polishing / cleaning material by rotating an impeller. A method of projecting a polishing / cleaning material in a batch-type polishing / cleaning method, in which a workpiece is batch-cleaned using a centrifugal polishing / cleaning material projection device In addition, the center position of the projection area of the abrasive material is moved within a predetermined area.

The direction of rotation of the impeller may be reversed between the first polishing step (1 batch) and the second polishing step. Further, the speed of moving the center position of the projection area of the abrasive material can be appropriately selected according to the form of the article to be processed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to FIGS. The centrifugal abrasive cleaning material projection device used in the practice of the present invention is equipped with an abrasive cleaning chamber adapted to roll an object to be processed by rotation of an endless apron (not shown), and to inspect the object to be processed in batches. It is installed in the cabinet.
As shown in FIG. 1, this centrifugal abrasive cleaning / projecting apparatus is composed of a centrifugal abrasive cleaning / projecting material projection mechanism 1 and a control gauge operating mechanism 2 for operating a control gauge. Then, in the centrifugal abrasive cleaning projection mechanism 1, as shown in FIG.
As shown in FIG. 3, an auxiliary cover 6 having a hole 5 in the center is mounted on the outer surface of the right side wall of the cover body 4 surrounding the impeller 3, and the roller bearing 7 is fitted in the hole 5. A short cylindrical body 8 is fitted inside the roller bearing 7, and the cylindrical body 8 has a central axis perpendicular to the outer surface of the side wall of the cover body 4 and is rotatable in a vertical plane. .

Further, the right end of the control gauge 9 which penetrates the cylindrical body 8 and is located in the impeller 3 is detachably attached to the cylindrical body 8 by engaging the flange portion 10a with the cylindrical body 8. The control gauge 9 has a polishing / cleaning material discharge port 10b, and the right end of the control gauge 9 is in contact with the left end of the introduction tube 12 via a rubber-made elastic elastic member 11. Is detachably held by the control gauge 9 and the holding mechanism 13. As shown in FIG. 2, the holding mechanism 13 includes a support member 15 attached to the auxiliary cover 6 via a holding member 14 attached to the right end of the cylindrical body 8 and extending in the front-rear direction.
And a holding bolt 16 screwed to the support member 15 (see FIG. 1).

Further, as shown in FIG. 2, an annular filling member 17 is mounted on the left side of the rolling element 7a in the roller bearing 7, and the filling member 17 is manufactured by solidifying felt or metal fiber. It has a structure and has a certain degree of elasticity, and is supported by being pressed by a liner 18 attached to the left side of the auxiliary cover 6.

Further, the control gauge operating mechanism 2
Is an electric cylinder 21 pivotally supported so as to be vertically movable via a support member 20, and an adjusting member 22 screwed to a tip of a piston rod of the electric cylinder 21 and pin-connected to the cylindrical body 8. It is composed of. The control gauge 9 is rotated forward and backward through the cylindrical body 8 by the expansion and contraction operation of the electric cylinder 21. In addition,
In the figure, 23 is a cover liner, and 24 is an introduction pipe.

Then, the centrifugal abrasive cleaning material projecting device thus constructed was used to batch-process the objects to be treated by the method of the present invention, and a comparative test was conducted with the conventional abrasive cleaning material projecting method. .
That is, after inserting a pipe joint as an article to be processed into a cabinet (not shown), the impeller is rotated in one direction to project the polishing material, and the electric cylinder 21 of the control gauge operating mechanism 2 is expanded and contracted during one polishing step. It is operated to reciprocate the center position of the projection area of the abrasive cleaning material within a predetermined area at a rate of 2 times / minute. On the other hand, for comparison, after inserting the pipe joint into the cabinet in the same manner, the impeller 3
To rotate the impeller 3 in one direction to project the abrasive, or to rotate the impeller 3 in one direction for a predetermined time and then temporarily stop the impeller 3 to rotate in the opposite direction to project the abrasive. The fitting was cleaned. Then, the cleaning degree of the pipe joint was measured using the 5% copper sulfate method, and the result is shown in FIG.

The degree of cleaning by the 5% copper sulphate method means that the pipe joint after scouring and cleaning is coated with copper sulphate solution to deposit copper on the metal part and blacken the sand part, and a certain measurement area at that time The ratio of the copper deposition area in the above. According to FIG. 3, in the method of the present invention, a predetermined cleaning degree could be obtained in a polishing time of 12 minutes, but in the method of rotating the impeller forward and backward, it was 16 minutes, and in the method of rotating it in one direction, it was 20 minutes.
Each time, it took time to clean. Therefore, it can be seen from FIG. 3 that the method of the present invention can significantly shorten the polishing time as compared with the conventional method.

It should be noted that the rotation direction of the impeller 3 is set such that, when the impeller 3 is rotated in the normal direction in the first polishing step (1 batch), it is rotated in the reverse direction in the second polishing step. in this way,
By performing both forward and reverse rotations of the impeller, both front and back surfaces of the blades that make up the impeller are used, and the life is longer than when the impeller is rotated in only one direction and only one side of the blade is used. Will be significantly longer.

[0013]

As is apparent from the above description, according to the present invention, the center position of the projection area of the abrasive cleaning material is moved within a predetermined area during one polishing operation. Since it is possible to project more evenly on the object to be processed,
Compared with the conventional method of projecting abrasives, the time required for abrasive cleaning can be significantly shortened, and moreover, by rotating the impeller forward and backward for each batch, the abrasive cleaning agent Since the control gage flows in two directions, uneven wear of the control gage is eliminated, and the life of the distributor and control gage is extended compared to the conventional method of projecting abrasives by rotating the impeller in only one direction. It has an excellent effect.

[Brief description of drawings]

FIG. 1 is a front view of a centrifugal projection device used for carrying out a polishing agent projection method of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a graph for comparing the cleaning / cleaning material projection method of the present invention and the conventional cleaning / cleaning material projection method with respect to the relationship between the cleaning degree and the cleaning / cleaning time.

Claims (1)

[Claims] 1. A polishing and cleaning method in which a workpiece is batch-cleaned by using a centrifugal-type cleaning-and-cleaning-material projection device that applies a centrifugal force to the cleaning and cleaning material by rotating an impeller to project the cleaning and cleaning material. A method of projecting a polishing / cleaning material in the method, wherein a center position of a projection area of the polishing / cleaning material is moved within a predetermined area during one polishing / cleaning step. Method of projecting abrasive cleaning material with a projection device.