JPH1025559A - Metal thermal spraying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal thermal spraying device in which the body to be treated is continuously thermally sprayed with a molten metal for a long time and capable of forming a metal coating layer. SOLUTION: This metal thermal spraying device is the one in which the body 4 to be treated is thermally sprayed with a molten metal to form a metal coating layer. In this case, oppositely to the thermal spraying direction, the rear of the body 4 to be treated is provided with the deposited part 11 of the surplus metal 8a, as for the deposited part 11, in the case a prescribed amt. of thermally sprayed metal deposits on a depositing board 13, the depositing board 13 set in layers to the thermal spraying direction and deposited with the surpus metal 8a is moved by a sliding shaft 16, and the thermally sprayed metal is deposited on the other depositing board 13 laminated in the rear direction of the above depositing board 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal spraying apparatus for spraying a metal on a surface of an object to be processed.

[0002]

2. Description of the Related Art A conventional metal spraying apparatus has a structure as shown in FIG. That is, the spraying gun 3 is attached to the sealed spraying booth 1, the metal wire 2 is supplied to the spraying gun 3, and the metal is sprayed on the surface of the workpiece 4. The thermal spray booth 1 is divided into a thermal spray portion 1 a where metal is sprayed on the workpiece 4 and an exhaust portion 1 b by a separation plate 6. 5 is an exhaust duct. The spray-sprayed metal 8 adheres to the object 4 to be processed, and the excess metal 8a is drawn by the exhaust portion 1b through the opening 7, a part of the metal is settled, and the other is discharged from the exhaust duct 5 to the outside. Is done. Excess metal 8a is exhaust part 1
b, it is deposited on the separation plate 6 near the opening 7. When the object 4 is continuously supplied and the thermal spraying is performed continuously for a long time, the deposit 9 of the surplus metal 8a grows in an icicle shape as shown in FIG. , And may adversely affect the thermal spraying of the workpiece 4. The deposit 9 of this metal is
In order to remove this, it is necessary to interrupt the spraying operation, open the spraying booth 1, and mechanically scrape off.

[0003]

However, when the object to be processed is continuously supplied, for example, when it is desired to continuously perform metal spraying on the surface of an aluminum tube continuously extruded by a long continuous extruder, thermal spraying is required. Suspended work, spraying booth 1
Opening and removing the deposit 9 has a problem that productivity is reduced. SUMMARY OF THE INVENTION An object of the present invention is to provide a metal spraying apparatus which is provided with a device for removing excess sprayed metal and enables continuous spraying operation.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the invention according to claim 1 is a metal spraying method for forming a metal coating layer by spraying a molten metal on an object to be processed. The apparatus is characterized in that a surplus metal depositing section is provided behind the object to be treated facing the spraying direction, and a plurality of depositing plates stacked in the spraying direction are set on the depositing section. It is.

According to a second aspect of the present invention, there is provided a metal spraying apparatus for forming a metal coating layer by spraying a molten metal on an object to be processed. And a tape is set on the deposition portion so as to face the spraying direction.

According to the first aspect of the present invention, when a predetermined amount of the sprayed metal is deposited, the depositing plate in the depositing portion of the surplus metal is moved by the control means. Then, the next stacking plate superimposed on the spraying direction appears on the surface, and the surplus metal is sprayed on this stacking plate. In this way, when the surplus metal is sprayed onto new deposition plates one after another, the metal coating layer can be formed by spraying the molten metal onto the object continuously for a long time. Therefore, by using the metal spraying apparatus of the present invention, it is possible to continuously perform metal spraying on a long object to be continuously supplied.

According to the second aspect of the present invention, the tape on which the surplus metal is deposited is run at a predetermined speed by the tape control means. Then, since a certain amount or more of surplus metal does not deposit on the tape, the metal coating layer can be formed by spraying the molten metal onto the object continuously for a long time.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. (Embodiment 1) FIG. 1 is a sectional explanatory view of a first embodiment of a metal spraying apparatus according to the present invention. FIG. 2 shows FIG.
FIG. 1 and 2, the same parts as those described with reference to FIG. 6 are designated by the same reference numerals.
In FIG. 1, a thermal spray booth 1 is divided into a thermal spray portion 1a where metal is sprayed on a workpiece 4 and an exhaust portion 1b by a separating plate 6. An opening 7 is provided at an end of the separation plate 6, so that the sprayed portion 1a and the exhaust portion 1b communicate with each other. The surplus metal 8a sprayed onto the processing target 4 by the thermal spray gun 3 is deposited on the surplus metal 8a deposition portion 11 provided in the rear of the processing target 4 facing the spraying direction.

[0009] As shown in FIG. 2, the deposition section 11 is provided with a storage box 12 provided at a position facing the spray gun 3.
Inside, a cassette 14 in which several stacking plates 13 are inserted is housed. The plurality of stacking plates 13 are housed in an overlapping manner so as to face in the spraying direction. The stacking unit 11 has control means for the stacking plate 13. The control means pushes the sliding shaft 16 in the direction of the spray gun 3 (to the right in FIG. 2) by the motor 17 and the screw 15, and the sliding shaft 16 passes through a through hole (not shown) of the cassette 14. Pile 13
Is pushed in the direction of the thermal spray gun 3, and the deposit 9 of the surplus metal 8 a is dropped together with the deposition plate 13 through the opening 7 to the exhaust part 1 b. The sliding shaft 16 is internally threaded, is restricted from rotating by a key or the like, and slides only in the front-rear direction by the screw 15 rotated by the motor 17.

Next, the operation of the control means of the deposition plate 9 will be described. This means operates as follows. That is, 1) The door (not shown) provided on the side surface of the storage box 12 is opened, and the cassette 14 into which several stacking plates 13 are inserted is inserted into the storage box 12. At that time, the sliding shaft 1
6 is retracted. Note that the cassette 14 is provided with a protrusion 1 provided on the thermal spray booth 1 (the front surface of the storage box 12).
c, and does not fall into the spraying booth 1. 2) After the cassette 14 is stored in the storage box 12, the motor 17 is driven for a predetermined time to push the sliding shaft 16 forward (to the right in FIG. 2), and the stacking plate 13 is set at a predetermined position. 3) Then, after the start of spraying, during the set time t _1, and retains the deposition plate 13 to the motor 17 to the standby state at a predetermined position, the excess metal 8a is deposited on the deposition plate 13. 4) Thereafter, during the set time t ₂ , the motor 17 is operated to move the sliding shaft 16 forward, and the depositing plate 13 on which the surplus metal 8a has been deposited is pushed out of the cassette 14 to open the opening 7
Then, it is dropped to the exhaust part 1b. 5) A new deposition plate 13 appears on the surface, and excess metal 8a is deposited on the surface. By repeating such an operation, the deposit 9 deposited on the deposition plate 13 is maintained at a certain amount or less, and metal spraying is continuously performed.

The control means of the stacking plate 13 is not limited to the above embodiment, but may be of a gravity type. For example, as shown in FIG. 3, each of the plurality of stacked deposition plates 13 is suspended by a hook 19 through a guide 18 that suppresses runout due to thermal spraying. These hooks 19
If the surplus metal is accumulated on the stacking plate 13 by a predetermined amount or more when the metal is broken or opened at a predetermined weight, the stacking plate 13 falls and the surplus metal accumulates on the new stacking plate 13. start.

Further, the control means of the stacking plate 13 may be of a falling type by electromagnetic force. For example, as shown in FIG. 4, the upper electromagnet 20a and the lower electromagnet 2
0b is provided, and a plurality of stacked thin iron deposition plates 13 are vertically held by magnetic force. Excess metal deposits 9 are deposited on the deposition plate 13 in the upper and lower portions excluding the rear portion of the object. Therefore, when the electromagnetic force of the upper electromagnet 20a is set to 0 when a certain amount of surplus metal is deposited, the deposition plate 13 on which the surplus metal is deposited is held only by the electromagnetic force of the lower electromagnet 20b. As a result, the stacking plate 13 is bent, and finally the upper side of the stacking plate 13 falls rightward in FIG. At this time, the other inner stacking plate 13 is held by the electromagnetic force of the lower electromagnet 20b and does not fall. In order to control the stacking plate 13, if the stacking plate 13 is thinned or a horizontal streak is formed in the center of the stacking plate 13, the state of the stacking plate 13 being bent due to the weight of the upper stacking. Is more likely to occur.

(Embodiment 2) FIG. 5 is a schematic configuration diagram of another embodiment of the present invention. In the present embodiment, a control room 30 is provided outside the thermal spray booth 1. In the control room 30, the thin metal tape 31 runs at a predetermined speed so as to cover the opening 32 facing the spraying direction. That is, the metal tape 31
While the excess metal 8a is deposited, it is taken up by the take-up roll 34 by the drive motor 35 while maintaining an appropriate tension from the supply roll 33 having the brake 37. Therefore, the surplus metal 8a of a certain amount or more is not deposited on the portion of the metal tape 31 located in the opening 32. Note that the metal tape 31 that has been picked up is collected in the waist box 36. The take-up method of the metal tape 31 may be such that a hole is provided in a side edge of the metal tape 31 and the take-up roll 34 is made into a sprocket shape, or the take-up roll 34 may be a pinch roll. The above embodiments are examples embodying the present invention, and do not limit the technical scope of the present invention.

[0014]

According to the metal spraying apparatus of the present invention, a surplus metal depositing section is provided to remove surplus metal deposits.
There is an excellent effect that a metal coating layer can be formed by spraying a molten metal onto an object to be processed continuously for a long time. In particular, thermal spraying can be continuously performed on a long object to be continuously supplied, thereby improving productivity.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view of an embodiment of a metal spraying apparatus according to the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is an explanatory view of another embodiment of a control means of a deposition plate.

FIG. 4 is an explanatory view of still another embodiment of the control means of the deposition plate.

FIG. 5 is a schematic configuration diagram of another embodiment of the metal spraying apparatus according to the present invention.

FIG. 6 is an explanatory sectional view of a conventional metal spraying apparatus.

FIG. 7 is an explanatory view of a problem of a conventional metal spraying apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thermal spray booth 1a Thermal spray part 1b Exhaust part 1c Extrusion part 2 Metal wire 3 Thermal spray gun 4 Workpiece 5 Exhaust duct 6 Separating plate 7 Opening 8 Metal 8a Excess metal 9 Deposit 11 Deposit part 12 Storage box 13 Deposit plate 14 Cassette 15 Screw 16 Sliding shaft 17 Motor 18 Guide 19 Hook 20a Electromagnet 20b Lower electromagnet 30 Control room 31 Metal tape 32 Opening 33 Supply roll 34 Take-up roll 35 Drive motor 36 West box 37 Brake

Claims (2)

[Claims] In a metal spraying apparatus for forming a metal coating layer by spraying a molten metal onto a workpiece, a deposition section for excess metal is provided behind the workpiece in a direction opposite to the spraying direction, and the deposition section is provided on the deposition section. A metal spraying apparatus, wherein a plurality of deposition plates stacked in the spraying direction are set. 2. A metal spraying apparatus for forming a metal coating layer by spraying a molten metal on an object to be processed, wherein a depositing portion for surplus metal is provided behind the object to be treated in a direction opposite to the spraying direction, and A metal spraying apparatus characterized in that a tape is set facing the spraying direction.