JP2003291067A - Air blast processing device and air blasting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air blast processing device and an air blasting method capable of making efficiently the blast processing of a plate-form work without generating distortion. <P>SOLUTION: The air blast device to make blast processing for the plate-form work by blasting a blasting material from a nozzle 5 to the work transported on a conveyor 6, wherein the blasting angle of the nozzle 5 to the transporting surface of the conveyor 6 is inclined 30-70 degs. to the longitudinal direction of the conveyor 6, and the air blast processing method makes the blast processing by blasting the blasting material from the nozzle in such an arrangement that the blasting angle of the nozzle to the work being transported on the conveyor is 30-70 degs. to the longitudinal direction of the conveyor. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to deburring, roughening a plate-like workpiece used for home electric appliances, building parts, etc.
TECHNICAL FIELD The present invention relates to an air blasting apparatus and an air blasting method for performing processing such as removing cast iron after casting.

[0002]

2. Description of the Related Art As a method for deburring, roughening, and removing wrinkles after casting, plate-shaped workpieces such as metal used for home electric appliance parts and building parts, etc. There are known a method of performing manually by using an electric tool, an air blast method of blasting by injecting an injection material, and the like. However, in the method of performing it manually by using an electric tool, dust generated during processing is scattered to deteriorate the work environment, a large work space is required for a large number of people, and there are variations in processing by workers. There are many problems such as difficulty in obtaining stable processing quality. Further, the conventional air blasting method has less problems as in the above-mentioned manual method, but performs the blasting by intensively spraying the injection material from a direction perpendicular to the plate-shaped workpiece to a specific portion. However, there is a problem in that residual stress is locally generated and distortion occurs in the product. When such distortion occurs, the plate-shaped processed product does not become a flat plate shape and is curved, so that there is a problem that the quality as a product is deteriorated or the product cannot be used as a product.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and provides an air blasting method and an air blasting apparatus for efficiently blasting a plate-shaped workpiece without causing distortion. It was made to provide.

[0004]

DISCLOSURE OF THE INVENTION The present invention, which has been made to solve the above-mentioned problems, is to blast a plate-shaped workpiece by injecting an injection material from an injection nozzle onto a plate-shaped workpiece conveyed on a conveyor. 2. The air blasting device according to claim 1, wherein the air blasting device is arranged such that the jetting angle of the jetting nozzle 5 with respect to the conveyor surface is inclined by 30 ° to 70 ° with respect to the longitudinal direction of the conveyor. And In the air blasting device described above, an air blasting device in which the jetting nozzles are arranged above and below the conveyor so as to face each other is defined as the invention of claim 2, and in the air blasting device as described above, the jetting nozzles are installed in the conveyor. An air blasting device having a plurality of air-blasting devices arranged at a predetermined interval in either or both of the width direction and the longitudinal direction is defined as the invention of claim 3, and is shaken in a direction intersecting with the conveying direction of the plate-shaped workpiece. The invention of claim 4 provides an air blasting device in which an injection nozzle that injects an injection material while moving is arranged toward a conveyor that conveys a plate-shaped workpiece. Further, in the air blasting method of blasting the plate-shaped workpiece by injecting the injection material from the injection nozzle to the plate-shaped workpiece conveyed on the conveyor, the jet directed toward the plate-shaped workpiece being conveyed on the conveyor An air blasting method is characterized in that the jetting angle of the nozzle is inclined 30 to 70 ° with respect to the longitudinal direction of the conveyor and the jetting material is jetted from the jetting nozzle. The air blasting method in which the blasting process is performed by injecting a jetting material from jetting nozzles that are arranged facing each other above and below, is the invention of claim 6, and in these air blasting methods, in the width direction of the conveyor and Blast processing is performed by injecting an injection material from a plurality of injection nozzles arranged at a predetermined interval in either or both of the longitudinal directions. The air blasting method according to the present invention is defined as the invention of claim 7, and in each of the above air blasting methods, the injection nozzles arranged toward the conveyer for conveying the plate-shaped workpiece are intersected with the conveying direction of the plate-shaped workpiece. The invention of claim 8 provides an air blasting method in which an injection material is injected while swinging in a direction in which the air blasts.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are views showing an air blasting apparatus of the present invention, in which 1 is a blasting apparatus main body, which is a blasting chamber 3 which is used to carry a plate-like workpiece into a blasting chamber 3 by a compare from a loading port 2. After the blasting is performed in 3, the processed plate-shaped workpiece is unloaded from the unloading port 4.

Inside the blast chamber 3, there are arranged a plurality of jet nozzles 5 and a conveyor 6 composed of a large number of rollers. The plate-shaped workpiece is conveyed on the conveyor while the jet nozzles 5 are provided from both upper and lower sides. Thus, a spraying material such as alumina particles is sprayed and blasted. The rollers of the conveyor 6 are interlocked by a chain (not shown), and the motor 6 provided outside the blast chamber 3 rotates the driving roller 8 to drive the conveyor 6. The used injection material is conveyed to a transfer pipe 11 provided on one side of the blast chamber 3 by driving a screw conveyor 9 provided in the lower portion of the blast chamber 3 by a motor 10, and the transfer pipe 11 is used as the injection material. Is transferred to the cyclone type recovery tank 12. In the recovery tank 12,
Dust is separated and removed from the used injection material, and the dust is sent to the outside through the exhaust duct 13. The recycled injection material is sent to and stored in the injection material hopper 14 provided below the recovery tank 12. And the injection material is the injection material hopper 1
4 is discharged from the lower end of the sheet 4, is compressed and sent to the jet nozzle 5 by the compressed air, and is jetted from the jet nozzle 5 to blast the plate-shaped workpiece. As described above, the injection material circulates in the blasting machine body 1.

The injection nozzle 5 disposed in the blast chamber 3 is composed of a plurality of upper nozzles and a lower nozzle, and two nozzles are provided above and below the conveyor 6 in the traveling direction.
Three pieces are arranged at predetermined intervals in the width direction. It is assumed that these jet nozzles 5 incline the jet angle θ of the jet nozzle 5 with respect to the longitudinal direction of the conveyor 6 from 30 ° to 70 ° with respect to the transport surface H-H of the conveyor 6 formed substantially horizontally. By inclining the jetting angle θ from 30 ° to 70 °, it is possible to soften the impact when the jetting material collides with the plate-shaped workpiece and suppress the occurrence of distortion. That is, if the injection angle θ is less than 30 °, the blasting capability is reduced. On the other hand, if the angle θ exceeds 70 °, the collision force of the injection material becomes large and distortion is likely to occur. In addition, it is more desirable to set the injection angle θ to 40 to 60 ° because the generation of strain can be suppressed to be small and efficient blasting can be performed. The injection angle is the conveyor 6 as shown.
May be inclined by θ with respect to the conveyance direction of the conveyor 6
It may be inclined by θ in the direction opposite to the conveying direction of.

Further, the injection nozzle 5 has a drive motor 21.
Thus, the conveyor 6 can be swung in a direction substantially orthogonal to the conveying direction. The swing direction is usually conveyor 6
Although the direction is substantially orthogonal to the traveling direction, it is not necessarily required to be a right angle, and an error of about ± 10 ° is allowed as long as it intersects with the conveying direction of the conveyor 6. In addition, when the plate-shaped workpiece is relatively thick and less likely to cause distortion, the injection nozzle 5 can be provided only on either the upper side or the lower side, and when the width of the plate-shaped workpiece is small. There can be only one in the crossing direction. Further, although the processing speed becomes slow, it is possible to use only one injection nozzle 5 in the traveling direction when the transport speed is slowed.

The swing mechanism of the nozzle shown in the figure will be described below. That is, when the rotary disc 22 provided in the drive motor 21 rotates, the connecting rod 23 eccentrically attached to the disc 22 moves up and down by a crank method.
The vertical movement of the connecting rod 23 causes the other end of the connecting rod 24 whose one end is pivotally supported to vertically swing. The vertical rotation of the connecting rod 24 causes the connecting rod 26 to swing left and right through the connecting rod 25, so that the connecting rod 28 can swing left and right through the connecting rod 27 in the middle. As a result, the upper injection nozzle 5 can be swung right and left in a swinging state. Similarly, the lower injection nozzle 5 also swings the connecting rod 34 from the connecting rod 24 through the connecting rods 29, 30, 31, 32, 33 to the left and right to swing the injection nozzle 5 to the left and right. Can be rocked. In addition, the injection nozzle 5
The swing may be a swing type in which the tip of the nozzle swings in a swinging state as described above, but it is a slide type in which the angle of the jet nozzle 5 with respect to the conveyor 6 remains unchanged and the jet nozzle 5 is moved in parallel to the left and right. You can also

By disposing the spray nozzle 5 toward the gap between the rollers forming the conveyor 6, the spray material sprayed when there is no plate-shaped workpiece is prevented from being sprayed on the roller. As a result, unnecessary wear of the roller can be prevented.

Further, it is preferable that a control device (not shown) is provided in the air blasting device and the jetting condition of the jetting nozzle 5 is adjusted according to the conveying speed of the conveyor 6 and the size of the plate-shaped workpiece. . For example, a detection device for detecting the presence or absence of a plate-shaped workpiece such as a photosensor is provided at the carry-in port 2, and the individual injection nozzles 5 perform injection according to the size of the plate-shaped processed object and the transport speed of the conveyor 6. By jetting the material or stopping the jetting, it is possible to efficiently blast the plate-shaped workpiece without wasting the jetting material or the air.

(Embodiment) Above the roller type conveyor 3
Injection nozzle support unit 5 in which three injection nozzles 5 are mounted at a pitch of 200 mm at positions of 00 mm and 300 below
Two A and 5B were arranged at a pitch of 100 mm with respect to the transport direction of the plate-shaped workpiece. The swing width of the jet nozzle support units 5A and 5B in the width direction of the conveyor is set to 300.
mm, rocking speed is 70 min ^-1 , and the material is ADC12
Plate-shaped processed product (length 1060 x width 600 x thickness 1.
5t), transport speed 10 mm / sec, injection pressure 0.4
Blasting was performed by injecting alumina having a particle size of 100 to 150 μm under the condition of MPa. In the test, the injection angle θ was appropriately changed with respect to the machine direction of the plate-shaped workpiece with respect to the longitudinal direction of the conveyor, and the injection material was sprayed to measure the plane strain amount of the plate-shaped workpiece. The results are shown in Table 1. The plane strain amount of the plate-shaped workpiece is 1 in both the vertical and horizontal directions.
Those of mm or less were accepted.

[0013]

[Table 1]

As is clear from the above-mentioned Examples and Comparative Examples, the test No. In No. 1, the injection angle θ of the injection material onto the surface to be processed of the plate-shaped workpiece with respect to the longitudinal direction of the conveyor was out of the range of the present invention and was small, so the blasting capability was reduced and wrinkles and burrs remained. Therefore, the test No. In No. 7, on the contrary, the injection angle θ of the injection material onto the surface of the plate-shaped workpiece to be processed was out of the range of the present invention and was large, so the blasting capacity was strong and the strain amount exceeded 1 mm and was rejected. . In addition, the test No. In No. 9, since the jet nozzle 5 did not swing and the jet angle θ of the jet material onto the surface of the plate-shaped workpiece to be processed was 90 °, a large strain of more than 2 mm occurred. For these comparative examples and conventional examples, the test No. 2, No. 3, No. 4, N
o. 5, No. In No. 6, the injection angle θ of the injection material onto the surface to be processed of the plate-shaped processed material was appropriate, so that it was possible to manufacture an acceptable product in which the distortion amount was suppressed to 1 mm or less.

[0015]

As is apparent from the above description, the present invention is arranged such that the jetting angle of the jetting nozzle with respect to the longitudinal direction of the conveyor is inclined by 30 ° to 70 ° with respect to the conveying surface of the conveyor, and the plate-shaped workpiece Since the jetting material is jetted toward the surface to be processed, the impact when the jetting material collides with the plate-shaped workpiece can be softened, and the occurrence of distortion can be suppressed to a small level. Further, in the case where the jet nozzles are arranged above and below the conveyor so as to face each other, the plate-shaped workpiece can be blasted from both upper and lower surfaces, and residual stress is evenly generated on both upper and lower surfaces. No distortion occurs in the plate-shaped processed product. Further, a plurality of injection nozzles arranged at predetermined intervals in the width direction and the longitudinal direction of the conveyor can uniformly and efficiently blast the plate-shaped workpiece. Further, in the case where the injection nozzle that swings in the direction intersecting with the conveying direction of the conveyor is arranged, the injection material is not intensively sprayed to a specific portion. Therefore, the present invention has an extremely great industrial value as an air blasting method and an air blasting device capable of efficiently blasting a plate-shaped work product without generating distortion.

[Brief description of drawings]

FIG. 1 is a front view showing a configuration of an air blasting device of the present invention.

FIG. 2 is a side view showing the configuration of the air blast device of the present invention.

[Explanation of symbols]

5 injection nozzles 6 conveyor

Claims (8)

[Claims] 1. An air blasting device for blasting a plate-shaped workpiece by injecting a jetting material from a jet nozzle onto a plate-shaped workpiece conveyed on a conveyor, wherein an injection angle of the injection nozzle with respect to a conveyor surface is: An air blasting device, which is arranged at an angle of 30 ° to 70 ° with respect to the longitudinal direction of the conveyor. 2. The air blasting apparatus according to claim 1, wherein the injection nozzles are arranged above and below the conveyor so as to face each other. 3. The air blasting device according to claim 1, wherein a plurality of injection nozzles are arranged at a predetermined interval in either or both of the width direction and the longitudinal direction of the conveyor. 4. The injection nozzle for injecting the injection material while swinging in a direction intersecting with the conveying direction of the plate-shaped workpiece is arranged toward a conveyor for conveying the plate-shaped workpiece.
The air blasting device according to any one of to 4. 5. An air blasting method for blasting a plate-shaped workpiece by injecting an injection material from a jet nozzle onto the plate-shaped workpiece conveyed on a conveyor, wherein the plate-shaped workpiece being conveyed on the conveyor is The spray angle of the spray nozzle
An air blasting method, comprising injecting an injection material from an injection nozzle at an angle of 30 to 70 ° with respect to a longitudinal direction of a conveyor to perform blast processing. 6. The air blasting method according to claim 5, wherein the blasting process is performed by injecting a jetting material from jetting nozzles that are arranged above and below the conveyor so as to face each other. 7. A blasting process is performed by injecting an injection material from a plurality of injection nozzles arranged at a predetermined interval on either or both of the width direction and the longitudinal direction of the conveyor. The air blasting method according to claim 5 or 6. 8. The injection material is ejected while swinging an injection nozzle arranged toward a conveyor for conveying the plate-shaped workpiece in a direction intersecting with a conveying direction of the plate-shaped workpiece. The air blasting method according to 5 or 6 or 7.