JPS6130630B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic thermal spraying apparatus that automatically sprays a flat workpiece.

Conventionally, when spraying metal onto a flat workpiece, it has generally been done to spray the entire surface of the workpiece by holding a thermal spray gun by hand and moving it back and forth and left and right over the workpiece.

However, such a method has problems in that work efficiency is extremely poor and the distance between the spray gun and the workpiece (spraying distance) changes during the work, making it impossible to spray a film with a uniform thickness.

The present invention has been made in view of this point, and it improves the efficiency of thermal spraying work by automatically moving a thermal spray gun over the workpiece while maintaining a constant spraying distance and spraying the entire surface of the workpiece. In addition, it is an object of the present invention to provide an automatic thermal spraying apparatus that can perform uniform and beautiful thermal spraying.

That is, the present invention provides a gate-shaped traveling trolley having two traveling rails extending in the front-rear direction with a workpiece in between, and two transverse rails installed on the traveling rails and extending in the left-right direction on the upper part. , a traveling rotational drive device for driving the traveling truck to travel, a traversing platform provided so as to be able to traverse on the traversing rail of the traveling truck, a traversing rotational drive device for driving the traversing platform to reciprocate and traverse, and the traversing device. A thermal spraying gun mounted on a stand at a predetermined distance from the workpiece, a workpiece edge sensing means provided near the thermal spraying gun for sensing the edge of the workpiece, and a sensing signal from the workpiece edge sensing means for the above-mentioned traveling motion. The control means operates the rotary drive device for a predetermined period of time and controls the rotating direction of the traversing rotary drive device to be controlled, and the spray gun is moved in a zigzag pattern over a flat plate-shaped workpiece to spray onto the surface of the workpiece. It is characterized by automatic thermal spraying.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

1 to 4 show an automatic thermal spraying apparatus according to the present invention, in which 1 indicates left and right 2 extending in the front and back direction, which are laid across a flat plate-shaped work A (material to be sprayed) made of metal such as iron. It is a real running rail, and between the running rails 1, 1, there are side legs 3a, 3a facing each other in the left and right direction, each having two running wheels 2, 2, . 3a, two horizontal frame parts 3 horizontally suspended between the upper parts of 3a at a predetermined distance apart in the front and back direction.
A gate-shaped running trolley 3 consisting of rails 1 and 3b is mounted on the running rails 1 and 1 so as to be able to travel thereon. It is listed. The traveling rotary drive device 4 includes a traveling motor 5 disposed below one (left side in the figure) side leg 3a of the traveling trolley 3.
, a clutch 7 whose one end is connected to the traveling motor 5 via a transmission belt mechanism 6, a reducer 8 connected to the other end of the clutch 7, and one of the traveling carts 3 (the rear side in the figure). The driven shaft 8 of the reduction gear 8 is
A traveling drive shaft 11 having a driven gear 10 that meshes with the drive gear 9 attached to a, two sprockets 12, 12 attached to both ends of the traveling drive shaft 11, and two left and right traveling wheels of the traveling truck 3. Chain belt 14, which is wound between sprockets 13, 13 attached to 2, 2, respectively,
14, and after the rotation is transmitted to the reducer 8 through the clutch 7 and decelerated by the operation of the traveling motor 5, the traveling drive shaft 11 and the chain belt 1 are
The running wheels 2, 2 are rotationally driven via the running wheels 4, 14, and the running trolley 3 is made to run on the running rails 1, 1.

Further, at the inner end of each horizontal frame portion 3b, 3b of the traveling bogie 3, a transverse rail 1 made of channel steel extending in the left-right direction is provided.
5, 15 are respective flange portions 15a, 15a,...
are mounted facing each other, and between the transverse rails 15, 15 there is a rectangular lower frame 17 provided with two transverse wheels 16, 16, . A transverse platform 20 consisting of four columns 18, 18, . . . and an upper frame 19 connecting the upper parts of the adjacent columns 18, 18, . has been done. On the other hand, a traverse rotary drive device 21 is mounted on the traveling carriage 3 to drive the traverse table 20 in reciprocating traverse motion. The traverse rotation drive device 21 includes a double-axis traverse motor 2 disposed at the lower part of one (left side in the figure) side leg 3a of the traveling trolley 3.
2, and a forward/reverse clutch 2 connected to both shafts of the traverse motor 22 via a pair of transmission belt mechanisms 23.
4, a reducer 25 connected to the forward/reverse clutch 24, and a shaft mounted between the transverse rails 15, 15 at the left end of the horizontal frame part 3b of the traveling truck 3, and a driven part of the reducer 25. A transverse drive shaft 28 having a driven gear 27 that meshes with a drive gear 26 mounted on the shaft 25a, and transverse rails 15, 15 at the right end of the transverse frame portion 3b of the traveling bogie 3.
A chain bearing shaft 30 is suspended via a chain tension device 29 between them, two sprockets 31, 31 attached near the inner side of the traversing rails 15, 15 of the traversing drive shaft 28, and the chain bearing shaft 30.
The chain belts 33, 33 are wound around two sprockets 32, 32 attached near the inner side of the traversing rails 15, 15, and each of the chain belts 33, 33 has a midway portion fixed to the traversing table 20. 22, the rotation is once changed to normal/reverse rotation by the forward/reverse clutch 24 and decelerated by the reducer 25, and then the chain belt 3 is rotated through the transverse drive shaft 28.
3 and 33 in the forward and reverse directions, the traversing table 20
It is configured to run reciprocatingly on the transverse rails 15, 15. In addition, 34 is a control panel arranged on the left end of the horizontal frame part 3b of the traveling trolley 3.

Further, a box-shaped casing 35 is placed on the upper frame 19 of the traversing table 20, and the casing 35
A forward/reverse lifting motor 36 is attached to the lower surface of the outside of the casing 5, with its drive shaft 36a penetrating and projecting into the casing 35. An opening 37 provided in the lower surface of the casing 35 is located in the center of the casing 35.
A hollow chamber 38 is formed which opens to the outside through the hollow chamber 38, and a manual clutch 39 is disposed on the outer surface of the hollow chamber 38.
The lower end of 9 is connected to a drive shaft 36a of the forward/reverse rotation motor 36 for lifting/lowering. Further, above the hollow chamber 38 in the casing 35, the upper end is connected to the casing 3.
5, a rotary shaft 40 protruding outside is rotatably disposed, and the manual clutch 3 is mounted on the outer periphery of the rotary shaft 40.
A driven gear 41 that meshes with the drive gear 39a of No. 9 is attached, and a pipe-shaped rotating tube 42 that passes through the hollow chamber 38 and hangs downward from the opening 37 is connected to the lower end of the rotating shaft 40.
A cylindrical screw bearing 43 having a female threaded portion 43a on the inner circumferential surface is fitted and fixed to the inner periphery of the lower end of the rotary tube 42. On the other hand, two guide columns 44 , 44 are arranged below both ends of the casing 35 along the diagonal columns 18 , 18 of the traversing table 20 , and the upper ends of the guide columns 44 are connected to the upper mounting member 45 .
The lower end of the guide column 44 is fixed to the lower frame 17 of the traverse table 20 via a lower attachment member 46. moreover,
Reference numeral 47 denotes a substantially T-shaped lifting plate having a hollow tube 48 with a larger diameter than the rotary tube 42 in the center, and a mounting plate 49 is attached to the lower end of the lifting plate 47. The screw bearing 43 is integrally formed in connection with the pipe port, and the screw bearing 43 is provided on the outer peripheral surface of the hollow pipe 48 of the lifting plate 47.
A screw shaft 50 having a male threaded portion 50a screwed into the female threaded portion 43a of the screw shaft 50 is disposed with its lower end fixed to the mounting plate 49,
Boss members 52, 5 each have a guide hole 51 that is slidably fitted into the guide column 44 at both ends of the guide column 7.
2 is fixed. Therefore, while the lifting plate 47 is suspended and supported by the rotating tube 42 via the screw bearing 43 and the screw shaft 50,
The rotation tube 42 is rotated in the forward and reverse directions through the manual clutch 39 and the rotation shaft 40 by the operation of the forward/reverse movement motor 36 for vertical movement, thereby moving the screw shaft 50 up and down through the screw bearing 43 to move the lift plate 47 up and down. Lifting device 53
is configured.

A mounting shaft 54 having a flange portion 54a that abuts the lower surface of the mounting plate 49 of the lifting device 53 is rotatably connected to the lower surface of the mounting plate 49 via a connecting member 55. A support member 57 having a support shaft 56 protruding horizontally from both sides is attached to the lower end of the mounting shaft 54, and mounting metal fittings 59, 5 for gripping the thermal spray gun 58 are attached to each of the support shafts 56, 56, respectively.
9 is rotatably supported, and three arc-shaped bolt holes 60 are drilled around the support shaft 56 of the mounting bracket 59 and are centered on the axis of the support shaft 56. Insert the lock bolts 61, 61, 61 from 60, 60, 60 and attach the above mounting bracket 5.
9 is fixed to the support member 57, the thermal spray gun 58 is movably mounted on the mounting shaft 54. For example, in the case of a steel workpiece, the thermal spraying gun 58 sprays zinc, aluminum, aluminum alloy, or the like as a thermal spray metal onto the workpiece in order to prevent the workpiece from rusting. It sprays metal.

Furthermore, above the support member 57 of the mounting shaft 54, two L-shaped mounting members 62, 62 with one end hanging downward are mounted on both sides of the thermal spray guns 58, 58 in the left and right direction, A workpiece end sensing means 63 is fixed to the inner surface of the lower end of each mounting member 62 so as to face vertically downward. The workpiece end sensing means 63 is composed of a phototube, and emits light to an object below it, and detects the end of the workpiece A based on the amount of light reflected from the object. The workpiece end sensing means 63, 63 are each connected to a traveling control means housed in the control panel 34 via a cord (not shown). The travel control means includes both workpiece end sensing means 63, 6.
3 both output sensing signals, the traveling rotary drive device 4 is operated for a predetermined period of time, and the rotational direction of the traverse rotary drive device 21 is controlled to be switched. As described above, the thermal spraying guns 58 are moved over the workpiece A in a zigzag pattern to automatically spray the entire surface of the workpiece A.

Note that 64 and 65 are the guide columns 44 and 65, respectively.
44 and a bellows material covering the rotary tube 42, 66 a lifting manual handle attached to the upper end of the rotating shaft 40, 67 an operating switch connected to the upper end of the manual clutch 39, and 68 a lower frame 17 of the traversing table 20. Saddle rollers 69 and 70 provided on both sides are an upper limit switch and a lower limit switch for lifting and lowering, respectively. In addition, 71 is a mounting member 62
The touch switch 71 is a touch switch provided on the outer surface of the lower end of the spray gun 58 and detects the spraying distance H between the spray gun 58 and the workpiece A. ) is connected, and when the spraying distance H is outside the set value range, the elevation control means is activated by the detection signal of the touch switch 71 to adjust the spraying distance H.
The elevating device 53 is configured to be operated and controlled so that the value falls within a set value range.

Next, the effect of the above embodiment will be explained for the case where thermal spraying is performed on a flat plate-shaped workpiece A whose width becomes smaller toward the center as shown in FIG.
First, the work A ₁ is placed parallel to the travel rail 1 between the travel rails 1, 1, and then the lifting plate 47 of the lifting device 53 is operated to raise and lower the work A ₁ at, for example, the front left corner of the work A ₁ . The thermal spray guns 58, 58 are positioned so that they face each other at a predetermined distance from each other. After that, the traverse rotation drive device 2
1, the traverse platform 20 moves to the traverse rail 1.
5, 15, move to the right in the figure and move the thermal spray gun 5.
8 and 58 move in the lateral direction (trajectory a ₁ ) on the workpiece A ₁ , the sprayed metal traces onto the workpiece A ₁
Sprayed along A ₁ . And the above-mentioned transverse table 20
As the spraying guns 58 and 58 spread over the workpiece A ₁
When passing above the right end, the workpiece end sensing means 6
A traveling control means (not shown) is activated by the sensing signals from 3 and 63, and the traveling rotary drive device 4 is operated for a predetermined period of time to cause the traveling trolley 3 to travel on the traveling rails 1 and 1, thereby spraying. gun 58,
58 is vertically (trajectory) above the outer right end of work _A1 .
b ₁ ), and the rotation direction of the traverse rotation drive device 21 is automatically switched.
After the operation of the traveling rotational drive device 4 is stopped, the traversing table 20 traverses leftward in the figure on the traversing rails 15, 15 by the drive of the traversing rotary drive device 21 whose rotation direction has been changed, and the thermal spraying By moving the guns 58, 58 in the lateral direction (trajectory a ₂ ) over the workpiece A ₁ from the right end, the sprayed metal is sprayed onto the workpiece A ₁ along the trajectory a ₂ . Thereafter, the thermal spraying guns 58, 58 follow the trajectories b ₂ , a 3 _, a ₃ ,
..., bo _-1 , _ao , the workpiece _A1 is automatically sprayed along the trajectories _b2 , _a3 ..., bo _-1 , _ao .

In this case, the thermal spray guns 58, ₅₈
workpiece A ₁ while keeping the spraying distance H constant.
Since it moves above the surface, it is possible to uniformly spray the entire surface of workpiece _A1 , improving the quality of the spraying.

Moreover, the workpiece end sensing means 63 is connected to the thermal spraying gun 5.
By providing two sensing means 8, 58 on both sides in the left and right direction, and activating the travel control means only when both of the sensing means 63, 63 output sensing signals, a plurality of sensing means 63, 58 are provided between the traveling rails 1, 1. When spraying workpieces lined up in parallel in the left and right direction, if the gap between the workpieces is made smaller than the gap between both sensing means 63, 63, the spraying guns 58, 58 will pass above the gap between the workpieces. When doing so, one of the sensing means 63
Even if the sensing means 63 outputs a sensing signal, the other sensing means 63 is located on the workpiece and does not output a sensing signal, so it becomes possible to automatically spray a plurality of workpieces at the same time, further improving the efficiency of thermal spraying work. I can do it.

Furthermore, the thermal spray guns 58, 58 are mounted on the mounting plate 49 of the lifting device 53 via a mounting shaft 54, a support member 57, and a mounting bracket 59 so as to be rotatable in a horizontal plane and swingable in a vertical plane. So,
The arrangement and inclination angle of the spray guns 58, 58 can be freely adjusted depending on the shape of the workpiece A, the material of the sprayed metal, etc. In particular, thermal spray gun 5
8,58 are arranged vertically (at right angles) or diagonally to the running direction, the transverse table 20
By one traverse, it is possible to spray the workpiece A over a large width in the front-rear direction, making it possible to further improve the efficiency of the spraying work. In addition, if the thermal spray guns 58, 58 are arranged with a slight distance from each other in the traveling direction and are inclined inwardly facing each other, it is possible to spray the workpiece A from two directions facing each other. , uniform thermal spraying can be performed even on the workpiece A having small irregularities on the surface.

It should be noted that the present invention is not limited to the above-mentioned embodiment, but also includes various other modifications. For example, in the above-mentioned embodiment, the forward/reverse clutch 24 is used as the clutch of the traverse rotation drive device 21. The rotation direction of the traverse rotation drive device 21 is changed by operating the forward/reverse clutch 24, but the traverse motor 2 of the traverse rotation drive device 21 is
2, a forward/reverse motor may be used in place of the normal motor, and the rotation direction of the traverse rotation drive device 21 may be switched by switching the forward/reverse motor, and similar effects can be achieved.

Further, in the above embodiment, the thermal spray guns 58, 58 were attached to the traversing table 20 via the elevating device 53.
Of course, it may be directly attached to the traversing table 20 at a predetermined distance from the workpiece A.

Furthermore, it goes without saying that the number of thermal spray guns 58 attached to the traverse table 20 is not limited to two, but may be one or three or more.

As explained above, according to the automatic thermal spraying apparatus of the present invention, there are two running rails that extend in the front-back direction with the workpiece in between, and two running rails that are provided so as to be able to run on the running rails and that extend in the left-right direction on the upper part. A gate-shaped traveling truck having a traversing rail, a traveling rotary drive device for driving the traveling truck to travel, a traversing platform provided to be able to traverse on the traversing rail of the traveling truck, and driving the traversing platform in a reciprocating traversal manner. a rotating drive device for traversing the workpiece; a thermal spray gun mounted on the traverse table at a predetermined distance from the workpiece; a workpiece edge sensing means provided near the thermal spray gun for sensing the end of the workpiece; control means for operating the traveling rotary drive device for a predetermined period of time in response to a sensing signal from the section sensing means and for controlling the rotating direction of the traversing rotary drive device to switch the direction of rotation of the traverse rotary drive device; Since the spray can be moved in a zigzag pattern to automatically spray the entire surface of the workpiece, it is possible to simplify and streamline the spraying work, and to greatly improve the spraying accuracy. be.

Moreover, if two of the workpiece end sensing means are provided on both sides of the thermal spray gun in the left and right direction, and the control means is activated only when both of the sensing means output sensing signals, it is possible to detect a plurality of workpieces. Since thermal spraying can be carried out automatically at the same time, the efficiency of thermal spraying work can be further improved.

[Brief explanation of the drawing]

The drawings illustrate the embodiment of the present invention, and FIG. 1 is a plan view, FIG. 2 is a front view, FIG. 3 is a side view, FIG. 4 is a vertical side view of the lifting device, and FIG. 5 is a workpiece. FIG. 4 is an operation explanatory diagram illustrating the movement of the thermal spray gun relative to the direction of the spray gun. DESCRIPTION OF SYMBOLS 1... Traveling rail, 3... Traveling trolley, 4... Traveling rotational drive device, 15... Traverse rail, 20...
...Transverse table, 21... Traverse rotation drive device, 53...
... Lifting device, 58 ... Thermal spray gun, 63 ... Workpiece end sensing means.

Claims (1)

[Scope of Claims] 1. A gate-shaped running trolley having two running rails extending in the front-rear direction with a workpiece in between, and two transverse rails installed in the upper part that are provided so as to be able to run on the running rails and extending in the left-right direction. a traveling rotational drive device for driving the traveling truck; a traversing platform provided so as to be able to traverse on the traversing rail of the traveling truck; a traversing rotational drive device for driving the traversing platform in reciprocating traverse motion; A thermal spray gun is mounted on a traversing table at a predetermined distance from the workpiece, a workpiece edge sensing means is provided near the thermal spraying gun and detects the edge of the workpiece, and the above-mentioned traveling is performed based on a sensing signal from the workpiece edge sensing means. control means for controlling the rotary drive device for a predetermined period of time and switching the rotational direction of the rotary drive device for traversing, the spray gun is moved in a zigzag pattern over a flat plate-shaped workpiece, and An automatic thermal spraying device characterized by automatic thermal spraying on the entire surface. 2. Claims characterized in that two workpiece end sensing means are provided on both sides of the thermal spray gun in the left and right direction, and the control means is activated only when both of the sensing means output sensing signals. The automatic thermal spraying device according to item 1. 3. The automatic thermal spraying apparatus according to claim 1 or 2, characterized in that the thermal spraying gun is mounted on a traverse table so as to be rotatable in a horizontal plane and swingable in a vertical plane. 4. The automatic thermal spraying apparatus according to claim 1 or 2, characterized in that a plurality of thermal spray guns are arranged in a vertical line or in a diagonal line at equal intervals with respect to the traveling direction. 5. The method according to claim 1 or 2, characterized in that the two thermal spray guns are arranged inwardly facing each other with a slight problem with respect to the traveling direction. Automatic thermal spraying equipment.