JP2001038628A - Shot blasting device of built-up longitudinal member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the use of a shot blasting material, and to improve the shot blasting efficiency. SOLUTION: This shot blasting device achieves the shot blasting while carrying a built-up longitudinal member 20 in its longitudinal direction. The shot blasting device comprises a shot blasting material projecting mechanism having an impeller type shot blasting material projector 2 to project the shot blasting material to a part in the vicinity of a welded part of a web to a flange of the built-up longitudinal member 20, a recovering mechanism to recover the shot blasting material projected by the shot blasting material projecting mechanism, and a separating mechanism to separate the recyclable shot blasting material and others from the stuff recovered from the recovering mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically cleaning a welded portion between a flange and a web of a built-up longage material, a burnt portion of a coating film near a welded portion of the web, a flange upper surface and both end surfaces in a flange width direction. The present invention relates to a built-up cleaning device capable of performing well.

[0002]

2. Description of the Related Art In a ship or the like, as shown in FIG.
The flange 21 and the web 22 are welded (in FIG.
A T-shaped longitudinal member 20 (hereinafter referred to as a built-up longitudinal member) assembled by welding beads 3 is used as a structural material of the hull.

When assembling the built-up longing material 20 by welding, slag adheres to the welding bead 23,
The surface of the web 22 and the flange 2 adjacent to the weld bead 23
(1) Since the primer coating on the upper surface is burned out by welding, it is necessary to remove these slags and the burnt coating.

[0004] Further, since the flange 21 is cut from a steel plate into a strip shape by gas or plasma, both end surfaces 21a in the width direction of the flange 21 are cut surfaces.
Since slag accompanying the cutting adheres and rust is generated, the adhesion of the coating film is poor, and it is necessary to remove such slag and rust.

[0005] Such a dedicated blasting device for lapping the built-up longing material 20 has not been established so far, and is an impeller-type blasting device as a similar lapping device for steel. There is a polishing device for H-section steel provided with a.

[0006]

However, when a commercially available H-section steel cleaning apparatus is applied to the cleaning of a built-up longing material, there are the following problems.

In the cleaning of the built-up longing material,
Since the part to be polished is limited to the vicinity of the welded part and both end faces in the width direction of the flange, when the lapping device for the H-section steel is used to rub the built-up longing material, the entire surface of the built-up longing material is cleaned. As a result, the amount of the abrasive used becomes excessive.

Further, in order to ensure the quality of the blast treatment, it is generally necessary to set the amount of blast material to be blasted per unit area of the blast surface (hereinafter, referred to as the blast density) to a predetermined amount or more. In the blasting device for H-section steel, the disk of the impeller of the impeller-type blasting material is perpendicular to the upper surface of the flange,
Since it is oriented in a direction perpendicular to the web surface, the abrasive material projection range has a rectangular shape with the short side in the longitudinal direction of the built-up longing material. When performing blasting while moving the built-up longing material in the longitudinal direction, it is not possible to set the moving speed of the built-up longing material at a high speed in order to keep the projection density above a certain amount. There is a restriction on the improvement of

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and has a built-up structure capable of reducing the use amount of the abrasive material and improving the efficiency of the abrasive. It is intended to provide a cleaning device for longi materials.

[0010]

SUMMARY OF THE INVENTION A polishing apparatus for a built-up longe material according to the present invention is a polishing apparatus for performing cleaning while transporting the built-up longe material in a longitudinal direction, and comprising a web of the built-up longe material. And an abrasive material projection mechanism having an impeller-type abrasive material projector for projecting the abrasive material around the welded portion of the flange, and a recovery mechanism for collecting the abrasive material projected by the abrasive material projection mechanism, The apparatus is provided with a separation mechanism for separating a reusable abrasive and other materials from the collected material collected by the collection mechanism.

[0011] Further, the welded portion between the flange and the web of the built-up longing material, a predetermined range from the welded portion of the web, and an upper surface of the flange and a widthwise end surface of the flange are polished.

Further, the impeller-type abrasive material blasting machine impeller has a disk surface which is inclined from the upper surface of the flange by 0 to 60 degrees in the height direction of the web with the weld bead as an axis. A cleaning material projector is arranged.

Further, the impeller of the impeller-type abrasive material projecting machine is inclined with respect to the disk surface of the impeller-type abrasive material projecting machine in the height direction of the web of the built-up longitudinal material about a straight line connecting the center of the disk and the welding bead. -Includes an abrasive material projector.

[0014] The impeller-type abrasive material projector may be
It is arranged on both sides of the web of the built-up longe material.

In addition, the impeller-type abrasive material projecting device has
A guide plate for controlling the projection range of the abrasive material is provided.

Further, a coating apparatus is provided for performing coating on the polished surface after projecting the blast material.

Since the polishing apparatus for a built-up longing material according to the present invention is a cleaning apparatus dedicated to the built-up longing material, it is possible to use a small amount of the cleaning material and to improve the polishing efficiency. it can.

The impeller-type abrasive material projecting wheel impeller has a disk surface inclined from 0 to 60 degrees with respect to the upper surface of the flange in the height direction of the web with the weld bead as an axis. If the direction of projection of the cleaning material is within this range, the welded portion of the web and flange of the built-up longage material, the primer sandwiched between the welded portion of the web and the flange surface, the burned portion, and the width direction of the flange where rust is generated This is because the entire portion to be cleaned on the end face can be cleaned at once.

Further, the disk surface of the impeller of the impeller-type abrasive material projecting machine is inclined in the height direction of the web of the built-up longitudinal material around a straight line connecting the center of the disk and the weld bead. However, even if the short side of the abrasive material projection area is short, the welded part of the web and flange of the built-up longing material, the primer-burned part on the web and flange surface sandwiching this welded part, and rust are generated. This is because all the portions to be cleaned on the end faces in the width direction of the flange can be cleaned at once.

In addition, the impeller-type abrasive material projector has the following features:
The guide plate that controls the projection area of the abrasive material is provided because the projection area of the abrasive material is not projected below the built-up flange material flange, and it is projected on the flange width direction end face. This is to make the density equal to or more than a predetermined amount.

The reason why the coating apparatus for coating the polished surface is provided is to prevent rust on the polished surface.

[0022]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an explanatory view showing one example of a polishing apparatus for a built-up longing material according to an embodiment of the present invention.
1A is a front view of the polishing apparatus, and FIG. 1B is a side view of the polishing apparatus. In the figure, 1 is a cleaning room, 2 is an impeller.
Type abrasive cleaning material projector, 3 is a screw conveyor, 4 is a bucket elevator, 5 is a dust collector, 6 is a transport roller, 7 is a polishing material recovery pit, 8 is an abrasive material separation device, and 9 is a polishing material. The cleaning material supply hose 10 is a dust collection duct.

In the polishing apparatus for the built-up longing material, the transport roller 6 causes the built-up longing material 2 to be cleaned.
0 is transported in the longitudinal direction of the built-up longing material 20 while the impeller-type abrasive cleaning material projector 1 disposed in the cleaning chamber 1.
Then, the abrasive is projected on the welded portion between the web and the flange of the built-up longing material 20, a predetermined range from the welded portion of the web, and the upper surface of the flange and the widthwise end surface of the flange.
In FIG. 1 (a), the impeller type abrasive material projector 2
Although only the table is shown, in this polishing apparatus, two impeller-type abrasive cleaning projectors 2 are provided symmetrically with the web of the built-up longitudinal material 20 interposed therebetween. The cleaning operation on both the left and right is completed only by passing the cleaning device 20 once.

Projected on the built-up material 20,
Polishing to remove slag adhering to the welded portion of the built-up longing material 20, burnt coating film on the upper surface of the web or flange adjacent to the weld bead, or rust generated on both widthwise end surfaces of the flange. The material falls into a polishing material recovery pit 7 below the transport roller 6.

A screw conveyor 3 is provided in the abrasive material collecting pit 7, and the abrasive material in the abrasive material collecting pit 7 is removed by the screw conveyor 3.
Bucket elevator located approximately at the center in the longitudinal direction of the
It is raked toward the data 4.

FIG. 2 is a side view of the screw conveyor 3. The screw conveyor 3 is provided with a polishing material collection pit 7
The blasting material which is provided at the bottom of the pit and which has fallen into the blasting material recovery pit 7 is scraped off, and the blasting material is scraped to the bucket leveler 4 which is provided substantially at the center of the blasting material collection pit 7 in the longitudinal direction. . For this reason, the screw 3a on the left side of the bucket leveler 4 of the screw conveyor 3 is formed counterclockwise, and the screw 3b on the right side is formed clockwise.
As the rotating shaft 3c of the conveyor 3 rotates in any one direction, the abrasive material is collected on the bucket elevator 4.

The collected abrasive is scraped up by the bucket elevator 4. And, as shown in FIG.
The abrasive material 30 stored and carried in the bucket 4a of the bucket leveler 4 is discharged from the bucket 4a by the reversal of the bucket 4a passing through the upper pulley 4b of the bucket leveler 4, and It is received by the receiving plate 8 c and stored in the abrasive material separating device 8.

As shown in FIG. 3, the blasting material entering the blasting material separating device 8 includes a blasting material which can be reused by the screen 8a and a coating piece having a size which does not pass through the screen. Separated from foreign matter.

The reusable abrasive material is supplied again from the abrasive material separating device 8 to the impeller type abrasive material projector 2 through the abrasive material supply hose 9.

On the other hand, the dust that contains the coating film that has passed through the screen and the small abrasive particles that have been worn and cannot be reused are sorted by the wind using the dust catcher 8 b and sent to the dust collector 5 through the dust collection duct 10. Can be Among the materials that have been wind-screened by the dust catcher 8b, the effective abrasive material is sent to the abrasive material recovery pit 7 and reused.

The main part of the impeller-type abrasive material projector 2 is as follows.
As shown in FIG. 4 (a), an impeller-2a provided with a plurality of windows for discharging the abrasive material 30 on the cylindrical side surface, and an opening window provided on a part of the cylindrical side surface to project a predetermined direction. And a wheel 2b provided with a blade 2d on a disk 2c.

When the abrasive material 30 is supplied to the high-speed rotating impeller 2a via a shot, the projection direction is determined by the opening window of the deflector, and the abrasive material 30 is brought into the blade 2d of the impeller 2b. And is projected from the outer edge of the impeller 2b.

At this time, as shown in FIG. 4 (a), the projection range 11 of the blasting material 30 is a rectangle whose long side is a line parallel to the disk 2c.

The impeller-type blasting material projecting machine 2 is mounted on the disk 2c of the impeller 2b with respect to the upper surface of the flange 21 of the built-up longitudinal material 20 with the welding bead 23 as an axis in the height direction of the web 22. Since the long side of the projection range 11 of the blasting material 30 is parallel to the longitudinal direction of the built-up longitudinal material 20, the polishing is performed while transporting the built-up longitudinal material 20 in the longitudinal direction. At the time of sweeping, the projection density of the welded portion between the web and the flange of the built-up longing material 20, the burnt coating film of the web and the flange, and the widthwise end surface of the flange increases.

Further, as shown in FIG. 4B, the impeller-type blasting material projecting device 2 is mounted on the disk 2c of the impeller 2b with respect to the upper surface of the flange 21 of the built-up longitudinal material 20.
With the weld bead 23 as an axis, 0
Since it is disposed at an angle of up to 60 degrees, the projection range 1
1 includes a weld portion between the web and the flange of the built-up longing material 20, a burnt coating film on the web and the flange, and an end face in the width direction of the flange, and is cleaned at a time.

Further, as shown in FIG. 4 (c), the impeller-type abrasive material projecting device 2 is mounted on the disk 2c of the impeller 2b.
Since it is arranged to be inclined in the height direction of the web 22, the abrasive material 3
Even when the length of the short side of the projection range 11 of 0 is short, the welded portion between the web and the flange of the built-up longitudinal material 20, the burnt coating film on the web and the flange, and the widthwise end surface of the flange are included, and the polishing is performed at once. Is done.

As shown in FIG. 5, the impeller-type blasting material projector 2 eliminates the blasting range of the blasting material 30 below the flange 21 of the built-up longing material 20 in the blasting range 30 of the blasting material 30. , A guide plate 12 is provided.
Are reflected by the guide plate 12.

Since the abrasive material 30 reflected by the guide plate 12 is directed toward the widthwise end surface of the flange 21, the projection density of the abrasive material 30 on the widthwise end surface of the flange 21 is equal to or more than a predetermined amount.

FIG. 6 is a front view of the coating apparatus. As shown in FIG. 6, a coating device 13 is provided immediately after the cleaning chamber 1, and the cleaning surface of the built-up longage material 20 is coated so as not to generate rust. The coating apparatus 13 includes an upper spray gun 13a for coating a predetermined area of the upper surface of the flange 21 of the built-up longing material 20 and the web 22;
The spray gun comprises a lower spray gun 13b for coating the end face in the width direction, a gun stand 13c for supporting these spray guns, and a coating chamber 13d.

[0041]

According to the present invention, when the built-up longing material is polished, the amount of the blasting material used can be reduced, and the polishing efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a polishing apparatus for a built-up longing material which is an example of an embodiment of the present invention, wherein (a) is a front view of the polishing apparatus, and (b) is a side view of the polishing apparatus. It is.

FIG. 2 is a front view of a screw conveyor in a polishing apparatus for a built-up longe material which is an example of an embodiment of the present invention.

FIG. 3 is a front view of a polishing material separation device in a polishing device for a built-up longing material which is an example of an embodiment of the present invention.

4A and 4B are explanatory views of an arrangement state of an impeller-type blasting material projector, wherein FIG. 4A is a perspective view showing a relative positional relationship between the projector and a built-up longing material, and FIG. FIG. 4C is a front view showing a state in which the sweeping material projection direction is inclined about the welding bead with respect to the upper surface of the flange, and FIG. It is a top view showing the state where it was inclined as an axis.

FIG. 5 is a side view showing an installation state of a guide plate.

FIG. 6 is a front view of the coating apparatus.

FIG. 7 is a perspective view of a built-up longe material.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 blast chamber 2 impeller type blasting material projector 2a impeller 2b impeller 2c disk 2d blade 3 screw conveyor 4 bucket elevator 5 dust collector 6 transport roller 7 blasting material collection pit 8 blasting Material separation device 8a Screen 8b Dust catcher 8c Receiving plate 9 Abrasive material supply hose 10 Dust collection duct 11 Abrasive material projection range 12 Guide plate 13 Coating device 13a Upper spray gun 13b Lower spray gun 13c Gun stand 13d Painting room 20 Built-up long materials 21 Flanges 22 Webs 23 Weld beads 30 Abrasive materials

Claims (7)

[Claims] 1. An impeller-type blasting device for performing blasting while transporting a built-up material in a longitudinal direction, wherein the blasting material is projected around a weld between a web and a flange of the built-up material. A cleaning material projection mechanism having a material projection device, a recovery mechanism for collecting the cleaning material projected by the cleaning material projection mechanism, and a collected material recovered by the recovery mechanism,
An apparatus for cleaning a built-up longing material, comprising a separation mechanism for separating a reusable cleaning material from other materials. 2. A welded portion between the flange of the built-up longing material and the web, a predetermined range from the welded portion of the web, and an upper surface of the flange and an end face in a width direction of the flange. 2. A polishing apparatus for a built-up longe material according to item 1. 3. The impeller of the impeller-type abrasive material projecting machine inclines the disk surface of the impeller by 0 to 60 degrees with respect to the upper surface of the flange in the height direction of the web with the weld bead as an axis.
The polishing apparatus for a built-up longing material according to claim 1 or 2, wherein a blast-type cleaning material projector is arranged. 4. The impeller of the impeller-type abrasive material projecting machine according to claim 1, wherein a disk surface of the impeller is tilted in a height direction of a web of a built-up longitudinal material around a straight line connecting a center of the disk and a weld bead. 4. A polishing apparatus for a built-up longing material according to claim 1, further comprising a type of cleaning material projector. 5. The built-in structure according to claim 1, wherein said impeller-type abrasive material blasting machine is disposed on both sides of a web of a built-up longing material. Cleaning equipment for upholstery materials. 6. A built-up system according to claim 1, wherein said impeller-type abrasive material projecting device is provided with a guide plate for controlling a projection range of the abrasive material. Longi material cleaning equipment. 7. The cleaning of a built-up longing material according to claim 1, further comprising a coating device for performing coating on the surface to be cleaned after projecting the cleaning material. apparatus.