JPH08108365A - Numerically controlled blast cleaning device - Google Patents

Abstract

PURPOSE: To provide a numerically controlled blast cleaning device by which blast cleaning work of a rust preventive painting-applied steel plate surface can be performed and work time to the blast cleaning work can be reduced and a work environment can be improved. CONSTITUTION: A blast cleaning carriage 3 mounted with a blaster nozzle 4 is installed on a truck 2 to travel along a rail 1, and an air blast device 5 to be connected to the blaster nozzle 4 is mounted on the truck 2. An NC device 6 is arranged to control travel of the truck 2, a movement of the blast cleaning carriage 3 and actuation of the air blast device 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerically controlled blasting and cleaning device for blasting and cleaning a steel sheet surface by mounting a blasting and cleaning unit on a carriage and controlling the operation of these units by a numerical control device.

[0002]

2. Description of the Related Art Steel plates used for hull members of ships and structural members of bridges have iron oxide (black skin) adhering to the surface removed and the surface of the base metal exposed is subjected to rust prevention coating.
The surface of this rustproof coating is generally marked on for cutting or welding.

However, when other members are welded along a scribed welding line on the surface of the anticorrosion coating, defects such as blowholes may occur at the welded portion depending on the composition of the coating material. For this reason, prior to welding other members to the welding line, grind a predetermined width along this welding line to peel off the coating, and then mark the welding line again on the exposed base metal surface and weld it. Is being done.

As described above, the work for removing the anticorrosion coating applied to the surface of the steel sheet uses a hand cart equipped with a motor for driving a grinding belt and a drum sander, and the operator travels while moving the cart. Generally, the grinding belt or the drum sander is pressed against the surface of the steel sheet and is operated along the welding line.

[0005]

As described above, in the prior art in which the operator moves the hand cart in the work of removing the rust-preventive coating applied to the surface of the steel sheet, the work of removing the rust-preventive coating is performed manually. A lot of labor and time are required, working cost increases, and there is a problem that the working environment is deteriorated by dust. In particular, when it is necessary to weld a large number of stiffeners to the bottom material of a ship, the number of man-hours spent for the work of removing the anticorrosion coating is enormous.

In order to solve such a problem, the applicant of the present invention disclosed in Japanese Patent Application No. 3-97928 a grinding machine configured to be movable in a direction orthogonal to the rail on a carriage traveling along the rail. A machine equipped with a carriage and equipped with a grinding unit having a grinding belt configured to be rotatable on the grinding carriage was developed to numerically control the traveling of the carriage, the movement of the grinding carriage, and the operation of the grinding unit. The rust prevention coating can be automatically and easily peeled off easily and efficiently by performing the grinding work for, and the work efficiency can be greatly improved.

However, the above technique is not completely free from problems. That is, in the belt grinding or the drum sander grinding, a linear directionality appears in the width direction of the belt or the width direction of the drum at the grinding contact portion with the surface of the steel plate, and the grinding direction is continuously changed in the state where the grinding is performed. When turning, a relatively large force is required in the turning direction, which requires a support member with high rigidity, which increases the weight.

Further, there is a problem that a turning mechanism for turning a grinding unit such as a grinding belt in a desired grinding direction is required, which complicates the structure of the apparatus. Further, there is a problem that the numerical control system becomes complicated because the axis control of the turning mechanism is added to the numerical control system. There is also a secondary problem that maintenance of these is complicated.

Further, since the grinding unit such as a grinding belt mounted on the grinding carriage is composed of a mechanical processing device, the weight of the grinding unit becomes large when the device is enlarged to correspond to a steel plate having a relatively large area. There is a problem in that the weight load on the grinding carriage is increased and the inertia in the movement is increased, which makes it difficult to control the speed by numerical control.

The object of the present invention is to solve the above-mentioned problems fundamentally. By adopting the air blast method, the surface of the steel sheet can be automatically and efficiently cleaned by a compact and inexpensive device. An object of the present invention is to provide a numerically controlled polishing device capable of removing the anticorrosion coating.

[0011]

In order to solve the above-mentioned problems, a numerically controlled blasting and cleaning apparatus according to the present invention is mounted on a rail so that it can run along the rail, and is mounted on the trolley. A polishing carriage configured to be movable in the direction orthogonal to the rail, a blaster nozzle mounted on the cleaning carriage for polishing the surface of a steel plate, and mounted on the carriage and connected to the blaster nozzle by a hose. And an air blast device, and a numerical control device for controlling the traveling of the carriage, the movement of the cleaning carriage, and the operation of the air blast device.

[0012]

[Function] The numerical control polishing device (hereinafter referred to as "NC polishing device")
According to the above), a carriage configured to be able to travel along a rail is provided with a scouring / cleaning carriage configured to be movable in a direction orthogonal to the rail, and a blaster nozzle is mounted on the scouring / cleaning carriage. Numerical control device (hereinafter referred to as "NC device") for controlling the running direction, running speed, moving direction of the cleaning carriage, moving speed, and operation of the air blast device connected to the blaster nozzle.
Since the carriage is provided, the surface of the steel sheet can be ground and cleaned by operating the air blasting device while moving or moving the carriage and the cleaning carriage in a predetermined direction.

Therefore, the rust-preventive coating applied to the surface of the steel sheet can be peeled off according to the purpose of cleaning.

Further, since the blaster nozzle can come into contact with the surface of the steel plate freely in the traveling direction, when carrying out the blasting work for removing the rustproof coating of the steel plate, the welding line to be blasted is curved. Also, the rust preventive coating can be peeled off by immediately changing the direction along this welding line, advancing it in the desired direction, and cleaning.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an NC blasting and cleaning apparatus to which the above means is applied will be described below with reference to the drawings. 1 is a front view of the NC blasting and cleaning apparatus, FIG. 2 is a side view of the NC blasting and cleaning apparatus, FIG. 3A is a plan view of the air blasting apparatus, and FIG. 3B is a front view of the air blasting apparatus and the blaster nozzle. Is.

In the NC blasting / cleaning apparatus according to the present invention, a trolley / carriage 3 configured to be movable along a rail 1 is provided with a scoring / cleaning carriage 3 configured to be movable in a direction orthogonal to the rail 1. Blaster nozzle 4 on the cleaning carriage 3
And an air blasting device 5 connected to the blaster nozzle 4 by a hose is mounted on the carriage 2. The traveling direction and speed of the carriage 2, the moving direction and speed of the cleaning carriage 3, In addition, it is configured to have an NC device 6 that controls the operation of the air blast device 5. By using this NC scouring device, it is possible to remove the rust preventive coating applied to the surface of the steel sheet.

In the NC cleaning device shown in the figure, a marking torch 7 is attached to a cleaning carriage 3 having a blaster nozzle 4 mounted thereon.
And a printing device 8 are installed at the same time, and it is possible to selectively carry out a scouring work for removing the rust preventive coating and a marking work for forming a marking (hereinafter referred to as "marking") on the steel plate. It is configured to be possible.

In the blaster nozzle 4, a large number of particulate abrasives, which are jetted by compressed air from the air blasting device 5 in response to a command from the NC device 6, are sent by the blast hose 11 and strongly jetted from the blaster nozzle 4.
The abrasive collides with the surface of the steel plate. Then, the sprayed abrasive material and the generated small particles such as dust and paint are immediately vacuum-collected and passed through the vacuum hose 12 to the air blasting device 5.
Housed within. Further, the marking torch 7 and the printing device 8 are configured so as to be operated in response to a command from the NC device 6 to form markings such as welding lines, cutting lines or markings on the surface of the steel sheet.

When marking a welding line or a marking on a steel plate coated with anticorrosion by using the NC cleaning device, first, the antirust coating is peeled off using the blaster nozzle 4 and the air blasting device 5, and then the marking is performed. The welding line can be marked by using the torch 7 or printed by using the printing device 8, so that the work can be efficiently performed.

In the figure, the NC blasting / cleaning device is constructed so that it can traverse along a carriage 2 configured to run along a pair of rails 1 laid in parallel, and a cross rail 9 provided on the carriage 2. The cleaning and cleaning carriage 3, the blaster nozzle 4 mounted on the cleaning and cleaning carriage 3, the marking torch 7 and the printing device 8, the carriage 2 and the cleaning and cleaning carriage 3, and the air blasting device 5 and the marking are controlled. It comprises an torch 7 and an NC device 6 that controls the operation of the printing device 8.

The dolly 2 has substantially the same structure as that of a dolly used in a known numerically controlled gas cutting device or marking device.

The traverse motor 3 is attached to the cleaning carriage 3.
a is provided, and by driving the traverse motor 3 a, the cleaning carriage 3 can be traversed along the cross rail 9.

The air blasting device 5 operates in synchronization with the traveling of the carriage 2 and the traverse of the cleaning / cleaning carriage 3, so that the rust preventive coating formed on the surface of the steel sheet by the collision of the abrasive material jetted from the blaster nozzle 4 is applied. It peels off.
The blaster nozzle 4 is mounted on the cleaning carriage 3 via the lifting device 10, and the lifting bracket 10 of the lifting device 10 is installed.
is engaged with a.

As shown in FIG. 2, a support member 13 capable of supporting the blaster nozzle 4, the blast hose 11 connected to the blaster nozzle 4, and the vacuum hose 12 is fixed to the lifting bracket 10a. A guide member 14 that guides both hoses 11 and 12 and a nozzle support member 15 that supports the blaster nozzle 4 so that the blaster nozzle 4 can be moved up and down with respect to the support member 13 are provided at 13.

The nozzle supporting member 15 is rotatably engaged with both the supporting member 13 and the blaster nozzle 4, and the middle portion of the nozzle supporting member 15 is fixed to the supporting member 13. It is engaged with the cylinder 16.
The air cylinder 16 is configured to apply a predetermined air pressure to press the blaster nozzle 4 against the steel plate surface with a predetermined pressing force, and the blaster nozzle 4 can be moved up and down.

When the air cylinder 16 is operated and the ring brush 17 provided at the tip of the blaster nozzle 4 comes into contact with the steel plate, the blaster nozzle 4 is attached to the air cylinder 16.
The blaster nozzle 4 can be moved along the steel plate surface according to the unevenness of the steel plate surface by applying an air pressure slightly lower than the air pressure balanced with the weight of the steel plate surface.

The elevating bracket 10a of the elevating device 10 is constructed so that it can be elevated and lowered by an air cylinder or the like. With the above-described configuration, in the conventional grinding device using the grinding belt, the weight is inevitably large, and it is necessary to apply a high air pressure to the air cylinder of the vertical device to move up and down. When moving up and down the relatively lightweight blaster nozzle 4 as in the embodiment, it is possible to apply a relatively low air pressure to the air cylinder 16 to move up and down.

The blaster nozzle 4 and the air blasting device 5 connected to the blaster nozzle 4 and mounted on the carriage 2 can be constituted by known devices. As shown in FIG. 3, the air blasting device 5 sucks and collects dust, minute debris, and abrasives generated by collision of the abrasives with an automatic injection device 18 that mixes and injects abrasives with compressed air. The blower dust collector 19 and the bag filter 20 for separating dust from clean air are configured.

A particulate abrasive is stored in a blast tank 21 which constitutes a part of the automatic injection device 18, and compressed air is introduced from the outside through a pipe 22. Therefore, when the NC operation panel 6a is operated to activate the air blasting device 5, the compressed air introduced into the blast tank 21 mixes an appropriate amount of abrasive and the blast hose 11
To the blaster nozzle 4, and the abrasive is strongly ejected from the blaster nozzle 4. A large number of abrasives collide with the surface of the steel sheet by this spraying, and the surface of the steel sheet is abraded by the collision and the rust-preventive coating formed on the surface of the steel sheet can be peeled off.

The sprayed abrasive, dust generated, and minute debris are immediately collected by the vacuum hose 12 connected to the blaster nozzle 4, and at the same time, the ring brush 17 attached to the tip of the blaster nozzle 4 collects dust and the like. Prevents external scattering.

The blaster nozzle 4 has a double structure having an inner cylinder and an outer cylinder, and the abrasive and compressed air are jetted through the inner cylinder connected to the blast hose 11. Further, the vacuum hose 12 is connected to a passage formed between the inner cylinder and the outer cylinder, and sucks and collects dust, minute debris and abrasive generated by the collision of the abrasive. The ring brush 17 is provided on the outer side of the outer cylinder to prevent external scattering of abrasives and dust.

The vacuum hose 12 is a storage hopper
23, It is connected to the blower dust collector 19 via the bag filter 20. The storage hopper 23 separates the abrasive material from dust and fine debris and stores only the abrasive material in the storage tank 24.
After storing it in the blast tank 21, the abrasive can be reused. Further, the bag filter 20 is for separating dust from clean air, and a dust box for accommodating dust is arranged at the bottom of the bag filter 20.

The blast hose 11 and the vacuum hose 12 connecting the air blasting device 5 and the blaster nozzle 4 are installed on a guide member 25 provided on the carriage 2, and both of them are moved along with the movement of the blaster nozzle 4. Hoses 11 and 12
Can be distributed smoothly.

Next, the procedure for peeling off the rust-preventive coating applied to the steel sheet and marking the welding line by the NC scouring device constructed as described above will be described. When marking a welding line on the surface of a steel sheet with anti-corrosion coating,
Prior to marking the welding line, it is necessary to remove the anticorrosion coating applied near the welding line.

First, the NC device 6 is operated by the NC operation panel 6a.
The welding line data to be marked and the welding line data to be blasted are input to start the operation. NC device 6
In response to the command from, the cleaning carriage 3 is moved so that the blaster nozzle 4 is aligned with the control center. Next, the vertical device 10 and the air cylinder 16 are driven to drive the blaster nozzle 4
The ring brush 17 is brought into contact with the steel plate.

After that, the air blasting device 5 is operated to move or move the carriage 2 and the polishing / cleaning carriage 3 along the welding line, so that the welding line is made by the abrasive material jetted from the blaster nozzle 4 and colliding with the steel plate surface. It is possible to remove the rust-preventive coating on the surface of the steel sheet covering a predetermined range around the.

When the welding line is constituted by a gentle curve, such as a welded portion for welding a stiffener to the bottom material of a ship or a flange welded portion of a web forming a plate girder of a bridge, the grinding direction is set along the welded line. It is necessary to change. Even in this case, the blaster nozzle 4 can be freely advanced in a desired direction by a command from the NC device 6. By continuing the above operation, it is possible to remove the coating corresponding to all the welding lines.

After the coating around all the welding lines has been peeled off by the above-mentioned operation, the cleaning carriage 4 is moved by the command from the NC device 6 so that the marking torch 7 coincides with the control center, and the NC device 6 has already memorized it. It is possible to form the marking of the welding line on the steel sheet by operating the marking torch 7 while moving or moving the carriage 2 and the cleaning / cleaning carriage 4 in a predetermined direction according to the welding line data. .

When a number or a symbol is to be printed at a predetermined position on the steel plate, the printing device 8 can be operated in the same manner in place of the marking torch 7 for printing.

In the above-described embodiment, the marking torch 7 and the printing device 8 are all mounted on the cleaning carriage 3 having the blaster nozzle 4 mounted thereon, but these are mounted on separate carriages, respectively, like the cleaning carriage 3. Alternatively, the carriage 2 may be allowed to traverse.

[0041]

As described in detail above, according to the NC blasting / cleaning apparatus of the present invention, a predetermined range around the welding line can be blasted prior to marking or printing of the welding line on the steel sheet.

Since the peeling work of the rust preventive coating can be automated, the labor and time can be reduced and the working cost can be reduced. Moreover, since dust can be collected automatically and reliably, it can be protected from an unfavorable working environment.

Further, in the conventional belt grinding or drum sander grinding, a linear directivity appears in the belt width direction or the drum width direction at the grinding contact portion with the surface of the steel sheet, and continuous grinding is performed while grinding is being performed. In order to change the grinding direction by rotating the grinding direction, a relatively large force is required in the rotation direction. Therefore, since it is necessary to form the supporting member with high rigidity, the weight is increased. As described above, since the blaster nozzle is lightweight and can change direction, it can be configured with a small and lightweight support member, and the weight can be reduced.

Further, unlike the conventional case, a turning mechanism for turning a grinding unit such as a grinding belt in a desired grinding direction is unnecessary, and the structure of the apparatus is simplified. Along with this, the numerical control system is simplified because the axis control of the turning mechanism is unnecessary. In addition, maintenance of these becomes easy.

Further, since the blaster nozzle has an extremely light weight and a simple structure, the weight is relatively light even when the apparatus is enlarged to accommodate a relatively large steel plate, and the weight load on the cleaning carriage is reduced. At the same time, there is an effect that inertia in moving is small and speed control by numerical control is easy.

[Brief description of drawings]

FIG. 1 is a front view of an NC polishing device.

FIG. 2 is a side view of an NC polishing device.

FIG. 3A is a plan view of an air blast device, and FIG.
FIG. 3 is a front view of an air blast device and a blaster nozzle.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rail, 2 ... Cart, 3 ... Polishing carriage, 3a ... Traverse motor, 4 ... Blaster nozzle, 5 ... Air blast device, 6 ... NC device, 6a ... NC operation panel, 7 ... Marking torch, 8 ... Printing device , 9 ... Cross rail, 10 ... Vertical device, 10a ... Lifting bracket, 11 ... Blast hose,
12 ... Vacuum hose, 13 ... Support member, 14 ... Guide member, 15 ... Nozzle support member, 16 ... Air cylinder, 17 ... Ring brush, 18 ... Automatic spraying device, 19 ... Blower dust collecting device,
20 ... Bag filter, 21 ... Blast tank, 22 ... Pipe, 23 ... Storage hopper, 24 ... Storage tank, 25 ... Guide member

Claims (1)

[Claims] 1. A trolley mounted on a rail and configured to run along the rail, a scouring carriage mounted on the trolley and movable in a direction orthogonal to the rail, and mounted on the scouring carriage. A blaster nozzle for cleaning the surface of the steel plate, an air blasting device mounted on the carriage and connected to the blaster nozzle by a hose, and a numerical value for controlling the traveling of the carriage and the movement of the cleaning carriage. A numerically controlled blasting and cleaning device characterized by having a control device.