JPH0929642A - Method and device for blast-grinding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for grinding a work, which can automatically control projection range of a grinding material in response to a longitudinal dimension of the work. SOLUTION: In this method, a projecting material is projected toward a work 3, which is carried into a grinding chamber 1, by plural centrifugal projecting devices 4 arranged in the outer wall of the grinding chamber 1. This method is provided with a process for detecting a longtudinal dimension of the work 3 by the detecting means 7, and a process for converting a longitudinal- dimension-of-the-work 3 detecting signal to a moving position commanding signal for changing the position of at least one device of the centrifugal projecting devices 4 with a converting means 8 and a process for adjusting the moving position of at least one device of the centrifugal projecting devices 4 in the longitudinal direction of the work 3 with a driving means 5 in response to the moving position commanding signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blasting and blasting method and apparatus for automatically controlling the projection area of a blasting / cleaning material according to the size of the work in the longitudinal direction.

[0002]

2. Description of the Related Art Conventionally, in order to grind a work of a size about the size of an engine block, a plurality of works are arranged outside the grinding / cleaning chamber while being rotated by a work holding / rotating means in the grinding / cleaning chamber. A blasting and blasting method in which a projection material is projected toward a work with a centrifugal projection device is known (for example, Japanese Patent Laid-Open No. 51-1 / 1991).
14792 publication). In this method, the projection range of the abrasive cleaning material is determined by a plurality of fixed centrifugal projection devices. However, in this method, since the centrifugal projection device is fixed with a large work as a reference, when a small-sized work is ground and washed, it causes waste of the grinding and cleaning material, and it is originally ground and cleaned. There was a case where the inside of the cleaning room that should not be used was cleaned. In addition, the end of the work having a small size projects the polishing / cleaning material from a long distance, and the projection density of the polishing / cleaning material becomes small, so that efficient polishing / cleaning cannot be performed.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of these problems, and a blast blasting and cleaning method for automatically controlling the projection range of the blasting and cleaning material in accordance with the longitudinal dimension of the work and its method. The purpose is to provide a device.

[0004]

In order to achieve the above object, the blast blasting / cleaning method of the present invention uses a plurality of centrifugal projection devices arranged on the outer wall of the blasting / cleaning chamber to carry the blast material into the blasting / cleaning chamber 1. In the blast blasting and cleaning method for projecting toward the blasted work, a step of detecting the longitudinal dimension of the work by a detecting means at a pre-polishing position outside the blasting and cleaning chamber, and the detected work Converting a detection signal of the longitudinal dimension of the device into a moving position command signal of at least one centrifugal projection device for changing the position of at least one of the centrifugal projection device by a converting means, and the moving position command signal according to the moving position command signal. Adjusting the moving position of the centrifugal projection device in the longitudinal direction of the work by the driving means. Further, in order to achieve the above-mentioned object, the blast blasting / cleaning apparatus of the present invention projects the projection material toward the work carried into the blasting / cleaning chamber by a plurality of centrifugal projection devices arranged on the outer wall of the blasting / cleaning chamber. In the blasting / cleaning apparatus, a detection means for detecting the longitudinal dimension of the work at a pre-polishing position outside the polishing / cleaning room, and a detection signal electrically connected to the detection means and having at least one detection signal Conversion means for converting into a movement position command signal of the centrifugal projection device, and drive means electrically connected to the conversion means and controlling the movement position of at least one centrifugal projection device according to the movement position command signal. When,
It is characterized by including.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a partial cross-sectional schematic plan view showing an overall configuration showing an embodiment of the present invention. A roller conveyor 2 is provided outside the blasting / cleaning chamber 1 of the blasting / cleaning device. On the upper part of the roller conveyor 2, the work 3 can be carried in and out on the left and right.
Further, a stopper 2a that can move up and down is provided at a predetermined position of the roller conveyor 2 so that the work 3 can be stopped. On the other hand, on the side wall of the polishing chamber 1, three centrifugal projection devices 4
a, 4b, 4c are arranged in the longitudinal direction of the work 3, and an electric cylinder as a driving means 5 is provided in the centrifugal projection device 4c at the right end in order to adjust the moving position of the centrifugal projection device 4c. It is connected. A holding and rotating means 6 is cantilevered from the left side wall of the inside of the polishing and cleaning chamber 1 so that the work 3 can be held and rotated (FIG. 2).
reference). On the other hand, a plurality of detecting means 7 are provided at a predetermined interval (for example, 100 mm) from the front side of the polishing chamber 1 (below the drawing) to the front side of the work 3 (lower side of the drawing) conveyed into the polishing chamber 1. The photosensors are provided in a line (see FIG. 3). The detection means 7 outputs an OFF signal when light is shielded by the work 3, and a single row of optical sensors can output a detection signal corresponding to the size of the work 3. Further, the detecting means 7 is connected to a converting means 8 including an arithmetic device, and converts a detection signal from the detecting means 7 into a movement position command signal for the centrifugal projection device 4c. A micro computer was used for this converting means 8.

The converting means 8 is electrically connected to the driving means 5, and the driving means 5 adjusts and positions the moving position of the centrifugal projection device 4c according to the moving position command signal.

The operation of the apparatus configured as described above will be described. When the work 3 is conveyed from the right side in FIG. 1, the work 2 is stopped in front of the carry-in port of the polishing / cleaning chamber 1 by the stopper 2a stopped at the rising end. When the work 3 is stopped, the detecting means 7 is activated and sends its ON-OFF detection signal to the converting means 8 including the arithmetic unit. The conversion means 8 converts the detection signal from the detection means 7 into a signal instructing the moving position of the centrifugal projection device 4c.

Next, the moving position command signal is sent from the converting means 8 to the driving means 5, and the driving device 5 moves the position of the centrifugal projection device 4c by the signal for instructing the moving position.
The drive means 5 can change the projection position (entire projection range) of the projection material of the centrifugal projection device 4c.

After the measurement of the dimensions of the work 3 is completed, the work 3 is carried into the polishing / cleaning chamber 1 from the roller conveyor 2 by a carrying-in / carrying-out means (not shown), and held by the holding / rotating means 6. After that, it is rotated about the horizontal direction. At this time, the centrifugal projection devices 4a-4c are activated, and the work 3 is blast-cleaned in the projection range of the projection material determined in the above-mentioned process.

After the blast cleaning of the work 3, the holding / rotating means 6 stops its rotation, the work 3 is released from the holding, and again,
It is carried out from the inside of the polishing / cleaning chamber 1 onto the roller conveyor 2 by carrying-in / out means (not shown).

The same operation is performed even when the small work 3a is ground and cleaned. In this case, the centrifugal projection device 4c is 4c
Since it moves to c and is ground and cleaned, the end surface of the work 3a can be ground and cleaned with a higher projection density than when the centrifugal projection device is located at 4c, and the waste material of the projection material is eliminated. As described above, according to the present invention, it is possible to automatically prevent waste of the shot material even with a small work 3.

In the embodiment of the present invention, the centrifugal projection device 4 is movably attached to the side wall of the polishing / cleaning chamber 1.
It may be provided on the upper wall instead of the side wall. Further, the centrifugal projection device 4 may be provided on the sloped wall. At least 1
The centrifugal projection device 4 of the machine may be provided so as to be movable in the longitudinal direction of the work 3.

In the embodiment of the present invention, the means 3 for detecting the dimension of the work 3 in the longitudinal direction is one in which optical sensors are arranged in a line.
The type is not limited as long as it can detect the dimension of the groove 3.

In the embodiment of the present invention, after the blast-polishing of the work 3, the work 3 is released from the holding state, and again by the carrying-in / out means, from the inside of the polishing chamber 1 to the original roller. Although it is carried out on the conveyor 2, it may be carried out from the inside of the polishing / cleaning chamber 1 to another roller conveyor 2 by providing a carry-out port on the side opposite to the carry-in side.

In the embodiment of the present invention, three centrifugal projection devices 4a, 4b, 4c corresponding to the movement of the drive means 5 are used.
By changing the position of the centrifugal projection device 4c at the right end, the control of the blasting range was automatically performed. As shown in FIG. 4, the blasting and cleaning of the centrifugal projection devices 4a, 4c at both ends of the three machines was performed. The projection position of the material may be changed. In this case, it is efficient to move the centrifugal projection devices 4a and 4c with reference to the center position of the size of the work 3.

It is also possible to provide two centrifugal projection devices 4a and 4b instead of three, and move at least one centrifugal projection device among them. When a plurality of centrifugal projection devices 4 are arranged, the work positions of the work 3 in the direction perpendicular to the longitudinal direction can be efficiently cleaned by arranging the positions of the centrifugal projection devices 4 rather than arranging them in a straight line. . Further, the present invention is suitable when the work 3 is relatively large.

In the embodiment of the present invention, the work 3 is used.
The holding and rotating means 6 was supported by a cantilever from the left end of the polishing and sweeping chamber 1, but may be held from the right side or from both sides.

[0018]

As is apparent from the above description, the blasting method of the work according to the present invention by blasting the work is performed before the blasting.
Since the longitudinal length of the work is detected and converted to a moving position so that the driving means of the centrifugal projection device can be automatically adjusted, the projection range of the abrasive material can be controlled according to the longitudinal length of the work. You can In particular, it becomes easy to clean the end of the work with a high projection density. As a result, it is possible to efficiently perform the polishing and cleaning while preventing the polishing and cleaning material from being wasted. As described above, the effect of the present invention on the industrial world is remarkable.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional schematic plan view showing an overall configuration showing an embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a partial cross-sectional schematic plan view showing an overall configuration showing another embodiment of the present invention.

[Explanation of symbols]

 1 polishing chamber 3 work 4 centrifugal projection device 5 driving means 6 holding / rotating means 7 detecting means 8 converting means

Claims (4)

[Claims] 1. A work 3 in which projection material is carried into the polishing chamber 1 by a plurality of centrifugal projection devices 4 arranged on the outer wall of the polishing chamber 1.
In the blasting and blasting method in which the blasting and blasting are performed toward the target, the step of detecting the longitudinal dimension of the work 3 by the detecting means 7 at the pre-cleaning position outside the blasting and cleaning chamber 1, and the detected work 3 Converting the detection signal of the longitudinal dimension into a moving position command signal for changing the position of at least one of the centrifugal projection device 4 by the converting means 8; and at least one of the centrifugal projection device 4 according to the moving position command signal. A step of adjusting the moving position of the machine in the longitudinal direction of the work 3 by the driving means 5, and a blast polishing method. 2. A work 3 carried into the polishing and cleaning chamber 1.
2. The blast-polishing method according to claim 1, wherein said holding and rotating means 6 is blasted while being rotated about an axis parallel to the longitudinal direction of the work 3. 3. The work 3 in which the projection material is carried into the polishing / cleaning chamber 1 by a plurality of centrifugal projection devices 4 arranged on the outer wall of the polishing / cleaning chamber 1.
In the blast blasting / cleaning device for projecting toward the blasting device, a detecting means 7 for detecting the longitudinal dimension of the work 3 at a pre-polishing position outside the blasting / cleaning chamber 1, and an electrical connection to the detecting means 7 are provided. In addition, the conversion means 8 for converting the detection signal into the movement position command signal of at least one centrifugal projection device 4
And at least one centrifugal projection device 4 electrically connected to the conversion means 8 and in response to a movement position command signal.
And a drive means (5) for controlling the longitudinal movement position of the blast polishing apparatus. 4. A work 3 carried into the polishing and cleaning chamber 1.
4. The blast blasting / cleaning apparatus according to claim 3, further comprising a holding / rotating means 6 for holding and rotating the blasting / cleaning chamber 1.