KR20190027630A - Block bottom spray device and straight driving assistance system - Google Patents

Abstract

Disclosed are block bottom coating equipment and a straight driving assistance system thereof. According to an embodiment of the present invention, the block bottom coating equipment for coating a bottom surface of a ship block comprises: an autonomously driving moving cart; and a spray module installed in an upper part of the moving cart to spray paint upwards so as to paint an operation target surface. The spray module includes: a frame body coupled to an upper part of the moving cart; a gun holder assembly installed in the front of the frame body to install and operate a spray gun; a holder driving unit provided in the frame body and reciprocating a carriage coupled to the gun holder assembly in a lengthwise direction of the frame body; and a guide unit installed on each of front, back, left, and right sides of the frame body and irradiating a laser beam for guiding the front, back, left, and right sides when the gun holder assembly reciprocates.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a block bottom spraying apparatus and a straight driving assistance system,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a block lower painting equipment and a straight running assistance system.

The spray or coating of the ship has a very important effect not only on the anti-rust and anti-fouling performance but also on the efficiency of the fuel economy. It is also an important task in many aspects such as determining the beauty of ship products.

In order to improve the competitiveness of shipbuilding, it is necessary to reduce the work time, but the spraying operation depends on the manual work of the spraying machine. It is very difficult to adjust the thickness of the film (the thickness of the film specified in the contract specifications) because it depends on the skill of the operator.

Accordingly, there is a need for a spray automation device for reducing the dependency of the operator and for achieving the effect of coating reduction by observing the thickness of the coating indicated in the contract.

Straightness is very important for equipment that moves and paints the bottom of a ship block. The overall appearance of the coating should be uniform, and the width overlapping the end of the coating should be constant. In the case of mobile equipment, rather than stationary equipment, ancillary functions for straight-ahead driving are essential.

Korean Patent Laid-open Publication No. 10-2011-0072858 (published on June 29, 2011)

The present invention is to provide a block under painting equipment and a straight line driving assistance system which can secure the straightness and the uniformity of coating at the same time when the equipment for painting and moving the lower part of the ship block is running.

The present invention assists straight running for painting by aligning the position and direction between a moving carriage and a workpiece using a line laser and a guide device, secures straightness by weighting the steering wheel during the painting operation, And to improve the efficiency of the block lower painting equipment and its straight running support system.

Other objects of the present invention will become readily apparent from the following description.

According to an aspect of the present invention, there is provided a block bottom coating apparatus for coating a lower surface of a ship block, comprising: a self-traveling moving truck; And a spray module installed at an upper portion of the moving carriage and spraying paint upward to paint an upper surface of a work surface, the spray module comprising: a frame body coupled to an upper portion of the moving car; A gun holder assembly installed in front of the frame body for mounting and operating the spray gun; A holder driving unit provided inside the frame body and reciprocating the carriage coupled to the gun holder assembly in the longitudinal direction of the frame body; And a guide unit installed at front, rear, right, and left sides of the frame body, respectively, for irradiating a laser beam for guiding the front, rear, left, and right sides when the gun holder assembly reciprocates.

The guide unit may irradiate a laser beam to form a front guide line, a rear guide line, a left guide line, and a right guide line corresponding to a painting operation area on the upper surface of the work bench.

The guide unit may include a front guide laser installed in front of the frame body to form the front guide line, a rear guide laser installed at the rear of the frame body to form the rear guide line, A left guide laser installed to form the left guide line, and a right guide laser installed on the right side of the frame body to form the right guide line.

At least one of the front guide laser, the rear guide laser, the left guide laser, and the right guide laser comprises: a base bracket coupled to the frame body as a basic body portion; A yawing bracket rotatably coupled to the base bracket about a hinge point; A laser diode mounted on a surface of the yawing bracket; And an operation handle having a screw thread formed at an end portion thereof to fix the yawing bracket by rotation.

Wherein the moving bogie comprises: a running portion for rotating the wheel at a predetermined speed to move the moving bogie at a constant speed; A height adjuster connected to the spray module and adjusting a height of the spray module; A steering unit installed at the rear of the moving truck to adjust a moving direction of the moving truck by adjusting the angle of the wheels and a handle attached to an end of the steering shaft; And a brake unit for adjusting the degree of steering of the handle unit.

The handle portion includes a pair of mutually spaced apart grippers for gripping or releasing a disc as a rotating body perpendicular to the steering shaft to control the generation of frictional resistance; An X-shaped link member to which the pair of grippers are connected to one side end, respectively; A force transmission link member having one end connected to the other end of the X-shaped link member and the other end interconnected; And a driving unit connected to the other end of the force transmission link member to advance and retract.

The braking portion may brakes the handle portion during the painting operation and may release the braking to the handle portion during simple movement.

According to another aspect of the present invention, there is provided a linear driving assistance system for a block bottom coating equipment, wherein the guide equipment is installed at a lower portion of an upper surface of the work table, wherein the guide equipment comprises: A guide body; A base bracket installed at an upper center of the guide body; A pair of base hinge brackets installed on the base bracket; A pair of laser hinge brackets, one end of each of which is hinged to the pair of base hinge brackets; A laser bracket provided at the other end of the pair of laser hinge brackets; And a pair of line lasers provided at both ends of the laser bracket for irradiating a laser beam to form a reference line for aligning the position and direction of the block under coating equipment on the upper surface of the workbench, / RTI >

Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention.

According to the embodiment of the present invention, there is an effect that the equipment for moving and painting the lower part of the ship block can secure the straightness and the uniformity of coating at the time of traveling.

In addition, by aligning the position and direction between the moving vehicle and the workpiece by using the line laser and the guide device, it is assisting the straight running for the painting work, securing the straightness by heavy steering steering during the painting work, Thereby increasing the efficiency.

FIG. 1 is a perspective view illustrating a block lower painting equipment and a straight running assistance system according to an embodiment of the present invention. FIG.
FIG. 2 is a perspective view of a block bottom coating equipment according to an embodiment of the present invention,
Figure 3 is a side view of the block underlayment equipment shown in Figure 2,
Figure 4 is a front view of the block underlayment equipment shown in Figure 2,
5 is a view showing the operation of the brake unit,
6 is a perspective view of the brake portion,
7 to 10 are a front perspective view, a rear perspective view, a side view, a front view,
11 is a perspective view of the guide laser in various directions,
12 is a perspective view and a side view of the key holder assembly,
13 is an enlarged perspective view of a guide device according to an embodiment of the present invention,
14 is a view showing a state in which right and left working widths are confirmed using left and right guide lasers,
15 is a view showing a state of confirming the working width before and after using the front and rear guide lasers,
16 and 17 are views showing a position and orientation alignment using a guide device,
18 is a view showing a control process at the time of confirming right and left working widths,
19 is a view showing a control process at the time of confirming the working width before and after.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof. And the terms first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 is a perspective view illustrating a block lower painting equipment and a straight running assistance system according to an embodiment of the present invention.

The block bottom painting equipment 10 according to an embodiment of the present invention includes an upper spray module 14 and a lower moving carriage 12. The spray module 14 is sprayed with the spray gun while moving left and right to perform painting operation on the lower surface of the ship block (upper surface of the work table). The moving truck 12 moves at a constant speed so that the painting operation is performed on the lower surface of the ship block.

The straight running support system 1 includes not only the block lower painting equipment 10 but also separately arranged guide equipment 20. The guide device 20 irradiates a laser beam on the upper surface of the work bench to form a reference line for running. That is, by arranging the equipment line on the reference line by the guide laser irradiated from the block under coating equipment 10, the position and direction of the equipment can be adjusted so that the block under coating equipment 10 can run straight.

Hereinafter, each component will be described in detail with reference to related drawings.

FIG. 2 is a perspective view of a block bottom coating equipment according to an embodiment of the present invention, FIG. 3 is a side view of the block bottom coating equipment shown in FIG. 2, and FIG. 4 is a front view of the block bottom coating equipment shown in FIG. Fig. 5 is a view showing the operation of the brake portion, and Fig. 6 is a perspective view of the brake portion.

The block bottom painting equipment 10 according to an embodiment of the present invention includes a moving bogie 12 and a spray module 14. A self-propelled moving truck 12 is disposed at the lower portion and a spray module 14 is installed at the upper portion of the moving truck 12. [

The moving truck 12 includes a traveling portion 121, a height adjusting portion 122, a handle portion 123, and a brake portion 124. [

The traveling unit 121 includes a wheel and a driving module. The driving module is a driving means for rotating the wheel, for example, a motor. The driving module can rotate the wheel at a predetermined speed so that the moving truck 12 moves at a constant speed.

The height adjustment portion 122 is a portion connected to the spray module 14 and adjusts the height of the spray module 14. The spray module 14 can be raised and lowered according to the distance between the moving cart 12 and the top surface of the workbench so that the interval between the spray module 14 and the top surface of the workbench can be adjusted to a predetermined interval for the coating operation. For example, the height adjuster 122 may be a cylinder whose piston advances and retreats in the longitudinal direction by hydraulic pressure, or may be a vertical linear bar lifted and lowered by a motor.

Referring to FIG. 5, the handle portion 123 is installed at the rear of the moving truck 12, and adjusts the running direction of the running portion 121. The handle portion 123 can be handled by an operator and includes a steering shaft 1232 that adjusts the moving direction of the moving bogie 12 by adjusting the angle of the wheels of the driving portion 121, As shown in FIG.

The brake portion 124 can control the movement of the handle portion 123 by adjusting the frictional resistance of the rotating body by holding or loosening the disk 1233, which is a rotating body vertically installed on the steering shaft 1232. The movement of the handle portion 123 may be heavy or light depending on the operation of the brake portion 124. [

Here, the heavy movement of the handle portion 123 means that the handle steering is not free, because it requires an operation force equal to or greater than a predetermined force for steering the steering wheel. The light motion of the handle portion 123 means that the steering of the steering wheel is free .

The brake portion 124 can be operated so that the movement of the handle portion 123 is heavy during the painting operation. Further, the brake portion 124 can be operated so that the movement of the handle portion 123 is light during the simple movement.

5 and 6, the brake unit 124 includes a grip unit 210, a link unit 220, and a driving unit 230.

The grip portion 210 includes a pair of grippers 212 and 214 spaced from each other. The grippers 212 and 214 have a flat plate shape, and when they are spaced apart from each other, they contact the upper surface or the lower surface of the disk 1233 to generate frictional resistance.

The link unit 220 is a link structure connected between the driving unit 230 and the grip unit 210.

The link portion 220 includes an X-shaped link member 222 and a force transmission link member 224. The X-shaped link member 222 has a grip portion 210 connected to one end and a force transmission link member 224 connected to the other end. The force transmission link member 224 is composed of a pair of link members each having one end connected to the other end of the X-shaped link member 222 and the other end interconnected.

The end of the driving unit 230 is connected to the other end of the force transmission link member 224 and the end of the driving unit 230 moves forward and backward according to the operation of the driving unit 230.

When the end of the driving unit 230 is advanced to the left, the one end interval of the force transmission link member 224 is opened, and both ends of the X-link member 222 are also spaced apart. Therefore, the grip portion 210 is opened (see Fig. 5 (a)).

When the end of the driving unit 230 is moved back to the right side, the interval of the one end of the force transmission link member 224 is reduced, and the interval between both ends of the X-shaped link member 222 is also reduced. Therefore, the grip portion 210 is broken and the disc 1233 can be gripped (see FIG. 5 (b)).

The driving unit 230 for such forward and backward movement may be a cylinder type. In this case, the driving unit 230 may include a piston 234 moving forward and backward by hydraulic pressure, and a cylinder body 232 fixed by a fixed frame.

FIGS. 7 to 10 are a front perspective view, a rear perspective view, a side view, and a front view, respectively, of the spray module, FIG. 11 is a perspective view of the guide laser in various directions, and FIG. 12 is a perspective view and a side view of the gun holder assembly.

The spray module 14 includes a frame body 141, a gun holder assembly 142, a holder driving part 143, and guide parts 144a to 144d (hereinafter also referred to as 144 ').

A key holder assembly 142 is installed on the front side of the frame body 141 so as to reciprocate in the longitudinal direction of the frame body 141. A movement guide frame for guiding the stable horizontal movement of the key holder assembly 142 can be installed in front of the frame body 141. [ The gun holder assembly 142 can be horizontally moved at a stable height along the movement guide frame.

12, the gun holder assembly 142 includes a spray gun 330 for spraying paint in a predetermined direction (for example, upward) for painting, a gun holder 330 for mounting and operating the spray gun 330, .

The gun holder assembly 142 is coupled to a carriage reciprocating by the holder driving portion 143 in the frame body 141 so as to protrude forward of the frame body 141 and reciprocate in the longitudinal direction of the frame body 141 . The holder driving unit 143 includes a timing belt 1431 for reciprocating the carriage, a timing pulley 1432 for providing a rotational force to the timing belt 1431, and a driving motor 1433 for rotating the timing pulley 1432 can do.

Power supply for the operation of the gun holder assembly 142, control signal transmission, etc. may be accomplished by a cable chain installed within the frame body 141.

Referring to FIG. 12, the gun holder includes a key fixing part 310 for fixing the spray gun 330 and a key operation part 320 for triggering the spray gun 330.

The gun fixing part 310 includes a fixing body 311 to which the spray gun 330 can be mounted, and a connection body 312 coupled to the carriage.

The key operating section 320 includes a trigger 322 capable of providing an arbitrary pressing force to the trigger and an air cylinder 321 moving the trigger 322 forward and backward. A trigger 322 is coupled to the rod end of the air cylinder 321 so that the trigger 322 also goes back and forth when the rod moves back and forth according to the air pressure. When the trigger 322 is retracted, a trigger pull is made to perform the spraying through the spray gun 330, and when the trigger 322 advances, the trigger pulling is released and the spraying can be stopped. Here, the degree of pulling of the trigger may be adjusted according to the degree of backward movement of the trigger 322 so that the injection amount may be adjusted.

The guide portion 144 is a portion for guiding the front, rear, left, and right sides when the key holder assembly 142 reciprocates for painting.

The guide portion 144 includes a forward guide laser 144a, a rear guide laser 144b, a left guide laser 144c, and a right guide laser 144d. Each guide laser 144a-144d may be a line laser that illuminates a line having a constant width and length.

The front guide laser 144a and the rear guide laser 144b irradiate the front guide line L1 and the rear guide line L2 for positioning the front and rear starting points, respectively. The left guide laser 144c and the right guide laser 144d irradiate the left guide line L3 and the right guide line L4 for working width confirmation, respectively. Therefore, it is possible to confirm the painting operation area through the spray gun 330 through the front guide line L1, the rear guide line L2, the left guide line L3, and the right guide line L4.

11, the guide laser 144 includes a base bracket 1441, a yawing bracket 1442, a fixing bracket 1444, a laser diode 1445, and an operation handle 1443.

The base bracket 1441 is a basic body portion of the guide laser 144 and is coupled to the frame body 141.

The yawing bracket 1442 is rotatably coupled to the base bracket 1441 about the hinge point 1446. [ The first surface of the yawing bracket 1442 may be provided with a rotation setting slot for setting the rotation angle without interference with the operation handle 1443. [

A fixing bracket 1444 for fixing the laser diode 1445 is provided on the outer surface of the second surface of the yawing bracket 1442.

The yawing bracket 1442 is rotated so as to have a desired yawing angle with respect to the base bracket 1441 and then the operating handle 1443 threaded at the end portion is rotated to fix the yawing bracket 1442 have. Accordingly, the direction of the laser diode 1445 is adjusted so that the direction of the laser beam irradiated by the laser diode 1445 can be adjusted.

13 is an enlarged perspective view of a guide device according to an embodiment of the present invention.

The guiding device 20 according to an embodiment of the present invention is a separate component from the block lower painting equipment 10 and is used to align the position and orientation between the block lower painting equipment 10 and the workpiece.

The guide equipment 20 is installed individually under the ship block as an object to be worked, and forms a reference line for irradiating a laser beam on an upper surface of the workbench so that the work position can be confirmed in advance.

The guide device 20 includes a guide body 21, a base bracket 22, a base hinge bracket 23, a laser hinge bracket 24, a laser bracket 25 and a pair of line lasers 26.

The guide body 21 has a frame structure having a predetermined height. It is possible to have a shape that enables stable support. A base bracket 22 is provided at the upper center of the guide body 21. On the base bracket 22, a pair of base hinge brackets 23 are provided. One end of a pair of laser hinge brackets 24 is hinged to the ends of the pair of base hinge brackets 23, respectively. The other end of the laser hinge bracket 24 is provided with a laser bracket 25 to which a pair of line lasers 26 are fixedly coupled.

The laser bracket 25 has a shape in which both ends are bent at a predetermined angle with respect to the central portion, and a line laser 26 is fixedly coupled to the bent portions at both ends.

The laser hinge bracket 24 is rotatable with respect to the base hinge bracket 23 by a predetermined angle and can be fixed by the knob 27. [ The direction of the laser beam irradiated by the line laser 26 can be adjusted corresponding to the rotation angle of the laser hinge bracket 24.

The rotation angle of the laser hinge bracket 24 may be adjusted so that the reference line Ls is formed by irradiating a laser beam of a line shape at a desired position on the upper surface of the work surface without being disturbed by the running of the block under coating equipment 10 have.

When the reference line Ls is formed on the upper surface of the workbench, the block lower painting equipment 10 is provided with a left guide line L3 or a right guide line L4 formed by the guide laser 144, So that the block bottom coating equipment 10 can run straight during self-running.

FIG. 14 is a view showing a state in which the left and right guide lasers are used to confirm the right and left working widths, FIG. 15 is a view showing a state in which the front and rear guide lasers are used to confirm the working width, and FIGS. Fig. 5 is a view showing a position and direction alignment.

14, the left guide line L3 and the right guide line L4 are formed on the work surface upper surface 5 by irradiating the laser beam using the left guide laser 144 and the right guide laser 144, It can be seen that the gap between the left guide line L3 and the right guide line L4 is the left and right work widths.

15, a front guide line L1 and a rear guide line L2 are formed on a work surface upper surface 5 by irradiating a laser beam using a front guide laser 144 and a rear guide laser 144, It can be confirmed that the distance between the front guide line L1 and the rear guide line L2 is the working width before and after.

16 and 17, when the reference line Ls is formed on the upper surface of the work bench in the guide equipment 20, the block lower coating equipment 10 aligns the right guide line L4 with the reference line Ls It can be seen that the position and orientation of the block under coating equipment 10 are aligned.

18 is a view showing a control process at the time of confirming right and left working widths.

There are various variables in the work for painting. The spray characteristics can be varied by various changes of the fluid such as the spray pressure, the size of the tip (spray gun nozzle), the distance from the work surface, the characteristics of the paint, the characteristics of the dilution ratio,

In addition, the spray pattern can be changed according to the equipment setting conditions. Here, the equipment setting conditions may include spray on / off timing, start and end positions, and the like.

Since the final injection (spraying) pattern is not always the same in the range that satisfies the desired paint condition, it is possible to operate the equipment in the automated equipment so that the operator can know the shape of the final sprayed spray under the determined conditions.

Once the values of the specific conditions tested in advance are determined, the operator can adjust the laser diode in advance to check the painting area, check in advance which part of the work surface will be sprayed, and establish a work plan do.

(a), the left and right spray ranges vary depending on the characteristics (dilution ratio, solid content ratio, etc.) of the paint. If the viscosity is high, the spray area is narrow and if the viscosity is low, the spray area is wide and the spray gun may have the same moving width, but the actual working width may be changed to W11 and W12 (W11 < W12).

(b), the left and right working widths may vary depending on the time setting for turning on and off the spray gun. You can have a width of W21 if you turn on the spray gun quickly and turn it off late, or you can have a width of W22 (W21> W22) if you turn on the spray gun late and turn it off quickly.

19 is a view showing a control process at the time of confirming the working width before and after.

The working width of the paint can be determined according to the tip size of the spray gun (specification of the spray gun nozzle). For example, a 625 Tip can have a width of 6 inches from a 300 mm distance to the left and right.

(a) and (b), when the tip sizes of the spray gun are different from each other, the working width of the sprayed area may be different between W31 and W32. Accordingly, the direction of the front guide laser and the rear guide laser can be adjusted according to the tip size of the spray gun, so that the work width can be checked smoothly.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims And changes may be made without departing from the spirit and scope of the invention.

1: straight running support system 10: block lower coating equipment
12: Moving truck 14: Spray module
121: running part 122: height adjusting part
123: handle portion 124: brake portion
210: grip part 220:
230:
141: Body frame 142: Gun holder assembly
143: holder driving parts 144a to 144d: guide laser
20: guide device 21: guide body
22: base bracket 23: base hinge bracket
24: Laser hinge bracket 25: Laser bracket
26a, 26b: line laser

Claims (8)

A block underlaying equipment for painting the lower surface of a ship block,
Autonomously moving lanes; And
And a spray module installed on an upper portion of the moving carriage and spraying a paint upward to coat an upper surface of the work table,
The spray module includes:
A frame body coupled to an upper portion of the moving truck;
A gun holder assembly installed in front of the frame body for mounting and operating the spray gun;
A holder driving unit provided inside the frame body and reciprocating the carriage coupled to the gun holder assembly in the longitudinal direction of the frame body; And
And a guide unit installed at front, rear, right, and left sides of the frame body, respectively, for irradiating a laser beam guiding the front, rear, left, and right sides when the key holder assembly reciprocates. The method according to claim 1,
Wherein the guide part irradiates a laser beam to form a front guide line, a rear guide line, a left guide line, and a right guide line corresponding to a painting operation area on the upper surface of the workbench. 3. The method of claim 2,
The guide unit may include a front guide laser installed in front of the frame body to form the front guide line, a rear guide laser installed at the rear of the frame body to form the rear guide line, A left guide laser installed to form the left guide line, and a right guide laser installed to the right side of the frame body to form the right guide line. The method of claim 3,
At least one of the front guide laser, the rear guide laser, the left guide laser,
A base bracket coupled to the frame body as a base body portion;
A yawing bracket rotatably coupled to the base bracket about a hinge point;
A laser diode mounted on a surface of the yawing bracket; And
And an operating handle having an end formed with a thread to fix the yawing bracket by rotation. The method according to claim 1,
The moving bogie,
A traveling part for rotating the wheel at a predetermined speed to cause the moving vehicle to move at a constant speed;
A height adjuster connected to the spray module and adjusting a height of the spray module;
A steering unit installed at the rear of the moving truck to adjust a moving direction of the moving truck by adjusting the angle of the wheels and a handle attached to an end of the steering shaft;
And a brake portion for adjusting the degree of steering of the handle portion. 6. The method of claim 5,
Wherein,
A pair of grippers spaced apart from each other for holding or releasing a disk as a rotating body perpendicular to the steering shaft to control the generation of frictional resistance;
An X-shaped link member to which the pair of grippers are connected to one side end, respectively;
A force transmission link member having one end connected to the other end of the X-shaped link member and the other end interconnected;
And a driving portion connected to the other end of the force transmission link member to advance and retract. 6. The method of claim 5,
Wherein the brake portion breaks the handle portion during a painting operation and releases braking on the handle portion during simple movement. A straight running assistance system for a block under painting equipment according to any one of claims 1 to 7,
And guiding equipment installed at a lower portion of an upper surface of the work table,
The guide device comprises:
A guide body of a frame structure having a predetermined height;
A base bracket installed at an upper center of the guide body;
A pair of base hinge brackets installed on the base bracket;
A pair of laser hinge brackets, one end of each of which is hinged to the pair of base hinge brackets;
A laser bracket provided at the other end of the pair of laser hinge brackets;
And a pair of line lasers provided at both ends of the laser bracket for irradiating a laser beam to form a reference line for aligning the position and direction of the block under coating equipment on the upper surface of the workbench, .

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