CN114672757A

CN114672757A - Ion spraying device and process for metal surface coating

Info

Publication number: CN114672757A
Application number: CN202210160973.6A
Authority: CN
Inventors: 王勇; 黄长成
Original assignee: Wuhu Juxuan Metal Technology Co ltd
Current assignee: Wuhu Juxuan Metal Technology Co ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-06-28
Anticipated expiration: 2042-02-22
Also published as: CN114672757B

Abstract

The invention discloses an ion spraying device and a process for a metal surface coating, and the ion spraying device comprises a spraying box, wherein a spraying chamber is arranged in the spraying box, an ion spray gun is arranged at the top end of the spraying chamber, and the ion spray gun carries out plasma spraying on the surface of a metal substrate fixed in the spraying chamber; the spraying cavity is vertically internally provided with a partition plate and surrounds U-shaped support plates arranged on two sides of the partition plate, the partition plate divides the spraying cavity into a preheating cavity and a working cavity, the U-shaped support plates transversely penetrate through the preheating cavity and the working cavity and are provided with a conveying mechanism in a sliding mode, the conveying mechanism is used for driving a metal base body to move to the working cavity from the preheating cavity, the ion spray gun is arranged at the end of the working cavity, and a cooling device is arranged on the working cavity. The invention realizes that the metal matrix reaches the ideal temperature before spraying, is cooled and keeps the ideal temperature in the spraying process, introduces the working temperature during spraying to the preheating work and realizes the multi-stage utilization of energy.

Description

Ion spraying device and process for metal surface coating

Technical Field

The invention relates to the technical field of plasma spraying, in particular to an ion spraying device and process for a metal surface coating.

Background

Plasma spraying is a technique for strengthening and modifying the surface of a material, and can enable the surface of a metal to have the performances of wear resistance, corrosion resistance, high-temperature oxidation resistance, electric insulation, heat insulation, radiation protection, wear reduction, sealing and the like. The plasma spraying technique is a method of heating a material such as ceramics, alloys, metals, etc. to a molten or semi-molten state by using a plasma arc driven by a direct current as a heat source, and spraying the material at a high speed onto the surface of a pretreated workpiece to form a firmly adhered surface layer.

However, the surface temperature of the metal substrate is affected by the room temperature, the temperature difference between the metal substrate and the ion coating is large, the spraying effect is not ideal due to the large temperature difference, in the spraying process, the local position of the metal substrate is rapidly heated, the adhesion capability of the metal surface to the coating is affected, and even the risk of deformation exists.

Disclosure of Invention

The invention aims to provide an ion spraying device and process for a metal surface coating, and aims to solve the technical problem that a metal matrix is poor in spraying effect due to temperature difference in the prior art.

In order to solve the technical problems, the invention specifically provides the following technical scheme:

the invention provides an ion spraying device for a metal surface coating, which comprises a spraying box, wherein a spraying chamber is arranged in the spraying box, an ion spray gun is arranged at the top end of the spraying chamber, and the ion spray gun carries out plasma spraying on the surface of a metal substrate fixed in the spraying chamber;

The inside vertical division board that is provided with of spraying cavity and encircles the setting and be in the U type backup pad of division board both sides, the division board will spraying cavity divide into preheating chamber and work cavity, U type backup pad transversely passes the setting and is in preheating the chamber with just slidable mounting has transport mechanism in the work cavity, transport mechanism is used for driving the metal base member and follows preheating the chamber removes extremely the work cavity, the ion spray gun sets up work cavity tip, be provided with cooling device on the work cavity, the ion spray gun transport mechanism all is connected with control panel.

As a preferable scheme of the present invention, the upper end and one side of the partition plate are attached to the inner wall of the spraying box, a hot air flow passage is provided between the bottom of the partition plate and the spraying box, a gap is formed between the other side of the partition plate and the spraying box, and the U-shaped support plate is disposed in the gap in a penetrating manner.

As a preferable scheme of the present invention, an induced draft fan is installed at the bottom of the partition plate, the induced draft fan is arranged on the heat flow channel, an air inlet of the induced draft fan is arranged in the working chamber, an air outlet of the induced draft fan is arranged in the preheating chamber, and the induced draft fan is connected with the control panel.

As a preferred scheme of the present invention, a heating wire is disposed in an air outlet of the induced draft fan, and a temperature controller is disposed on the heating wire and connected to the control panel.

As a preferred scheme of the invention, a heat preservation door is hinged to the side edge of the spraying box, the partition plate is arranged on the heat preservation door in an attaching manner, the heat preservation door is provided with openings respectively arranged on two sides of the partition plate, the U-shaped support plates are respectively arranged at two tail ends of the preheating chamber and the working chamber and penetrate through the adjacent openings to be connected with arc-shaped support frames, and the arc-shaped support frames and the U-shaped support plates form a closed loop for the transportation mechanism to surround.

As a preferable scheme of the present invention, the cooling device includes a plurality of cold air ducts which are embedded in the end portion of the spraying box, the cold air ducts are installed around the ion spray gun, the cold air ducts penetrate through the spraying box and are connected with air boxes, and the air boxes are connected with the control panel.

As a preferable scheme of the invention, the transportation mechanism comprises a closed track arranged on the U-shaped support plate and the arc-shaped support frame, a plurality of clamping pieces are arranged on the closed track, the bottom ends of the clamping pieces slide on the closed track through a sliding block, a power module is arranged between the sliding block and the closed track, two adjacent clamping pieces are connected together through a chain, and the power module is connected with the control panel;

The both ends of holder all rotate and are provided with and are used for fixing metal base's spring hand, the spring hand transversely sets up on the holder and one side the spring hand with connect through the rolling disc between the holder, the rolling disc with control panel connects.

As a preferable aspect of the present invention, the U-shaped support plate disposed in the working chamber is higher than the U-shaped support plate disposed in the preheating chamber, and the U-shaped support plate is inclined upward while passing through the slit.

The invention provides an ion spraying process of a metal surface coating, which comprises the following steps:

s100, mounting the metal base on the clamping piece, and fixing the metal base through the spring hand;

s200, opening the power module and the rotating disc through the control panel, and enabling the metal matrix to sequentially enter the preheating chamber under the driving of the clamping piece;

s300, the metal substrate is driven by the power module to metal the working chamber, and the air box and the ion spray gun are sequentially opened through the control panel, so that the surface of the metal substrate is sprayed by the ion spray gun when the temperature of the metal substrate is controlled by the air box;

S400, the induced draft fan is turned on through the control panel, and the preheating cavity is heated by heat brought by the ion spray gun.

As a preferable aspect of the present invention, in step S300, the method further includes the steps of:

s301, opening the heating wire through the control panel to enable the temperature in the preheating chamber to be increased to a fixed temperature;

and S302, when the temperature in the preheating chamber is kept at the fixed temperature, controlling the heating wire to stop working through a control panel.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, the working chamber and the preheating chamber are arranged in the spraying box, and the ion spray gun and the cooling device are arranged on the working chamber, so that the metal matrix is kept at an ideal temperature under the action of cold air of the cooling device during spraying, the adhesion capability of the metal surface to the coating is improved, the temperature generated during spraying of the metal matrix and hot air generated after heat exchange of the cold air are introduced into the preheating chamber, and the metal matrix to be sprayed is preheated, so that the temperature difference between the surface temperature of the metal matrix and the coating in the early stage of spraying is reduced, the surface spraying effect of the metal is improved, and the multi-stage utilization of energy is realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

FIG. 1 is a schematic side view of an ion spraying apparatus for providing a metal surface coating according to the present invention;

FIG. 2 is a schematic top view of an ion spraying apparatus for providing a metal surface coating according to the present invention;

FIG. 3 is a schematic structural view of a thermal insulating door according to the present invention;

fig. 4 is a schematic structural diagram of a transport mechanism provided in the present invention.

The reference numerals in the drawings denote the following, respectively:

1-spraying box; 2-an ion spray gun; 3-a partition plate; 4-U-shaped supporting plates; 5-preheating the chamber; 6-a working chamber; 7-a transport mechanism; 8-a cooling device; 9-a draught fan; 10-a heat flow channel; 11-heating wires; 12-a thermal insulation door; 13-opening the hole; 14-an arc-shaped support frame;

701-closing the track; 702-a clamp; 703-a slide block; 704-a chain; 705-spring hand; 706-a rotating disc;

801-a cold air duct; 802-bellows.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 4, the invention provides an ion spraying device for metal surface coating and a process thereof, comprising a spraying box 1, wherein a spraying chamber is arranged in the spraying box 1, an ion spray gun 2 is arranged at the top end of the spraying chamber, and the ion spray gun 2 carries out plasma spraying on the surface of a metal substrate fixed in the spraying chamber;

inside vertical division board 3 that is provided with of spraying cavity and encircle U type backup pad 4 that sets up in division board 3 both sides, division board 3 divide into preheating cavity 5 and work cavity 6 with the spraying cavity, U type backup pad 4 transversely passes the setting and has transport mechanism 7 in preheating cavity 5 and work cavity 6 and slidable mounting, transport mechanism 7 is used for driving metal base and removes to work cavity 6 from preheating cavity 5, ion spray gun 2 sets up at 6 tip of work cavity, be provided with cooling device 8 on the work cavity 6, ion spray gun 2, transport mechanism 7 all is connected with control panel.

The spraying box 1 is a rectangular box body, the rest parts are sealed, one side of the spraying box is used for transporting the metal matrix on the transporting mechanism 7, the spraying box can also be connected with an air supply system and a control frame, the air supply system is a system for providing working gas and supplying powder gas, and a control panel is arranged on the control frame and used for automatically controlling the spraying device to achieve the purpose of full-automatic spraying; the ion spray gun 2 is a non-transferred arc plasma generator, on which the electricity, gas, powder, water and the like of the whole system are concentrated, and the ion spray gun 2 is also connected with a power supply for supplying direct current to the spray gun, usually a full-wave silicon rectifying device; the ion spray gun 2 is also connected with a powder feeder, a heat exchanger and other devices.

The spraying box 1, the ion spray gun 2, the gas supply system, the control frame, the power supply system, the powder feeder, the heat exchanger and other devices are all the prior art of plasma spraying, and a fully-equipped device system can be obtained through simple retrieval, which is not described herein again.

In the process of equal particle spraying, the technological parameters influencing the quality of a coating are many, and the ideal workpiece to be sprayed is to preheat the workpiece to the temperature to be reached in the spraying process before spraying, and then to adopt the measure of air injection cooling to the workpiece in the spraying process so as to keep the original temperature. In this embodiment, in order to realize the preheating of metal matrix, separate the spraying cavity for preheating cavity 5 and work cavity 6, preheat cavity 5 and work cavity 6 and separate through a division board 3 of metal material, when ion spray gun 2 carries out the spraying to metal matrix at work cavity 6, have another metal matrix of waiting to stop at preheating cavity 5, when work cavity 6 begins to work, can produce higher temperature, division board 3 makes the work in preheating cavity 5 rise to certain ideal temperature with the temperature water conservancy diversion to the preheating zone this moment.

In order to further improve the spraying effect of the surface of the metal matrix, the working chamber 6 is provided with the cooling device 8, the cooling device 8 is internally provided with inert gas with lower temperature, when the working chamber 6 works, the cooling device 8 carries out heat exchange on the metal matrix with the temperature sharply increased due to spraying in the working chamber 6, so that the temperature of the matrix is kept at an ideal temperature, the inert gas after heat exchange flows to the preheating chamber 5 from the working chamber 6, the metal matrix in the preheating chamber 5 is preheated, the multilevel utilization of energy is realized, the surface temperature difference before and after metal spraying is reduced, and the surface spraying effect of metal is improved.

In this embodiment, the upper end and one side of the partition plate 3 are attached to the inner wall of the spraying box 1, a hot air flow passage is provided between the bottom of the partition plate 3 and the spraying box 1, a gap is formed between the other side of the partition plate 3 and the spraying box 1, and the U-shaped support plate 4 is disposed on the gap in a penetrating manner.

The upper end of the partition plate 3 is welded on the spraying box 1, and in order to prevent cold air from directly entering the preheating chamber 5 from the working chamber 6, one side of the partition plate 3 is attached to the spraying box 1 to prevent the cold air from escaping. And when cold air is blown to the metal substrate from top to bottom, the cold air is heated to a certain temperature, and at the moment, the heated air flows into the preheating chamber 5 from the hot air flow channel, so that the flow of the air is realized, in particular, a circulating inert gas working system is arranged in each general spraying box 1, and an air receiving opening of the inert gas working system is arranged in the preheating chamber 5, so that the preheating chamber 5 is kept in a certain negative pressure environment.

The U-shaped supporting plate 4 penetrates through the partition plate 3 from the gap, after the spraying of the metal matrix in the working chamber 6 is finished, the spraying box 1 at the conveying position of the metal matrix after the spraying is finished is conveyed through the conveying mechanism 7, the preheated metal matrix is conveyed to the working chamber 6 from the gap, the ion spray gun 2 is controlled to spray the metal matrix under the action of the control panel, and at the moment, a new metal matrix is conveyed to the preheating chamber 5 in a chain mode to be preheated. The device is a reciprocating circulation device, can simultaneously and continuously preheat and spray, and has high energy utilization rate and high working efficiency.

Preferably, in order to further improve the circulation efficiency of the heat exchange gas, an induced draft fan 9 is installed at the bottom of the partition plate 3, the induced draft fan 9 is arranged on the heat flow passage 10, an air inlet of the induced draft fan 9 is arranged in the working chamber 6, an air outlet of the induced draft fan 9 is arranged in the preheating chamber 5, and the induced draft fan 9 is connected with the control panel. The induced draft fan 9 lets in the heating gas in the working chamber 6 in preheating the cavity 5 for improve the air temperature in preheating the cavity 5 fast, and prevent that the gas after the heating from rising to the metal substrate again in the working chamber 6, influence the control of temperature.

Preferably, a heating wire 11 is arranged in an air outlet of the induced draft fan 9, and a temperature controller is arranged on the heating wire 11 and connected with the control panel.

Because in this embodiment, the metal base gets into in proper order, and preceding metal base provides the environment of preheating for the metal base that the back got into one by one, so when production, the metal base of often first production does not have the environment of preheating, its quality and other product qualities have the difference, in order to eliminate the difference, improve product quality, draught fan 9 is inside to be provided with heater strip 11, this heater strip 11 can provide initial preheating environment for preheating cavity 5, and also can be at during operation control ambient temperature, can shut down when ambient temperature reaches required ideal temperature.

In this embodiment, the side of spraying case 1 articulates there is heat preservation door 12, and the division board laminating sets up on heat preservation door 12, is provided with the trompil 13 of installing respectively in division board 3 both sides on heat preservation door 12, and U type backup pad 4 sets up respectively and passes adjacent trompil 13 at two ends of preheating cavity and working chamber and is connected with ARC support frame 14, and ARC support frame 14 constitutes the closed loop that supplies transport mechanism 7 to encircle with U type backup pad 4.

The heat preservation door 12 is a hinged door capable of being opened and closed up and down, and is of a two-leaf structure, the upper leaf and the lower leaf are hinged to the upper edge and the lower edge of the spraying box 1 respectively, the heat preservation door is not limited by the U-shaped supporting plate 4 when being opened, the heat preservation door and the lower leaf form an opening 13 structure when being closed together, and the opening 13 structure is only used for the U-shaped supporting plate 4 and the conveying mechanism 7 to pass through.

In order to further improve the surface spraying quality of the metal matrix, the U-shaped support plate 4 and the arc-shaped support frame 14 form a closed loop structure, when the quality of the sprayed metal matrix is poor, the circular coating can be selected, and the metal matrix with the quality meeting the standard can be directly taken down.

In the present embodiment, the cooling device 8 includes a plurality of cooling air ducts 801 fitted to the end portions of the spray booth 1, the cooling air ducts 801 are installed around the ion spray gun 2, the cooling air ducts 801 pass through the spray booth 1 and are connected to air boxes 802, and the air boxes 802 are connected to a control panel.

Inert gas with lower temperature is provided in the wind box 802, and the inert gas is sprayed onto the metal substrate under the guiding of the cold wind cylinder 801 to cool the temperature of the metal substrate within a proper range, wherein the flow rate and the temperature of the gas provided by the wind box 802 can be controlled by a control panel.

In this embodiment, the transportation mechanism 7 includes a closed track 701 disposed on the U-shaped support plate 4 and the arc-shaped support frame 14, the closed track 701 is provided with a plurality of clamping members 702, the bottom ends of the clamping members 702 slide on the closed track 701 through a slider 703, a power module is disposed between the slider 703 and the closed track 701, two adjacent clamping members 702 are connected together through a chain 704, and the power module is connected with the control panel;

Two ends of the clamping piece 702 are rotatably provided with spring hands 705 for fixing a metal base body, the spring hands 705 are transversely arranged on the clamping piece 702, the spring hands 705 on one side are connected with the clamping piece 702 through a rotating disc 706, and the rotating disc 706 is connected with a control panel.

When the metal base spraying device is used, firstly, a plurality of metal bases are sequentially arranged on the clamping piece 702, and are completely fixed through the two spring hands 705, at the moment, the metal bases do not need to be arranged on the clamping piece 702 arranged in the working chamber 6, the metal bases sequentially enter the preheating chamber 5 and the working chamber 6 under the driving of the clamping piece 702, and are driven by the rotating disc 706 to rotate in the revolution process, so that the spraying is finished. Wherein the power module is prior art, and the rolling disc 706 is prior art, and the power module and the rate of movement of rolling disc 706 are all controlled by control panel.

Preferably, the U-shaped support plate 4 disposed in the working chamber 6 is higher than the U-shaped support plate 4 disposed in the preheating chamber 5, and the U-shaped support plate 4 is disposed to be inclined upward while passing through the gap.

The clamping piece 702 needs to complete a turn at the side gap of the partition plate 3, the smaller the curvature radius of the turn is, the more difficult the rotation is, so the turning radius of the turn needs to be increased, so the turning radius is increased by adopting a height difference mode, and the clamping piece 702 at the preheating chamber 5 is lower in height, so that the distance from the heated air can be reduced, and the preheating effect is improved.

An ion spraying process of a metal surface coating, comprising the steps of:

s100, mounting the metal base on a clamping piece, and fixing the metal base through a spring hand;

s200, opening the power module and the rotating disc through a control panel, and enabling the metal substrate to enter a preheating chamber in sequence under the driving of a clamping piece and rotate;

s300, a metal substrate is driven by a power module to form a metal working chamber, and an air box and an ion spray gun are sequentially opened through a control panel, so that the surface of the metal substrate is sprayed by the ion spray gun when the temperature of the metal substrate is controlled by the air box;

s400, the induced draft fan is opened through the control panel, and the preheating cavity is heated by heat brought by the ion spray gun.

Preferably, in step S300, the method further includes the steps of:

s301, opening a heating wire through a control panel to enable the temperature in the preheating chamber to be increased to a fixed temperature;

and S302, when the temperature in the preheating chamber is kept at a fixed temperature, controlling the heating wire to stop working through the control panel.

Through the ion spraying device and the process of the metal surface coating, the metal matrix can reach the ideal temperature before spraying, is cooled and kept at the ideal temperature in the spraying process, and introduces the working temperature during spraying to the preheating work, so that the multi-stage utilization of energy is realized.

The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made to the disclosure by those skilled in the art within the spirit and scope of the disclosure, and such modifications and equivalents should also be considered as falling within the scope of the disclosure.

Claims

1. The ion spraying device for the metal surface coating is characterized by comprising a spraying box (1), wherein a spraying chamber is arranged in the spraying box (1), an ion spray gun (2) is arranged at the top end of the spraying chamber, and the ion spray gun (2) carries out plasma spraying on the surface of a metal matrix fixed in the spraying chamber;

the inside vertical division board (3) that is provided with of spraying cavity and encircle the setting and be in U type backup pad (4) of division board (3) both sides, division board (3) will spraying cavity divide into and preheat cavity (5) and working chamber (6), U type backup pad (4) traversing sets up preheat cavity (5) with just slidable mounting has transport mechanism (7) in working chamber (6), transport mechanism (7) are used for driving metal base member and follow it removes to preheat cavity (5) working chamber (6), ion spray gun (2) set up working chamber (6) tip, be provided with cooling device (8) on working chamber (6), ion spray gun (2) transport mechanism (7) all are connected with control panel.

2. The ion spraying device for the metal surface coating according to claim 1, wherein the upper end and one side of the partition plate (3) are attached to the inner wall of the spraying box (1), a hot air flow channel () is arranged between the bottom of the partition plate (3) and the spraying box (1), a gap is formed between the other side of the partition plate (3) and the spraying box (1), and the U-shaped support plate (4) is arranged on the gap in a penetrating manner.

3. The ion spraying device of metal surface coating according to claim 2, characterized in that an induced draft fan (9) is installed at the bottom of the partition plate (3), the induced draft fan (9) is arranged on the hot water channel (10), the air inlet of the induced draft fan (9) is arranged in the working chamber (6), the air outlet of the induced draft fan (9) is arranged in the preheating chamber (5), and the induced draft fan (9) is connected with the control panel.

4. The ion spraying device of the metal surface coating according to claim 3, characterized in that a heating wire (11) is arranged in an air outlet of the induced draft fan (9), a temperature controller is arranged on the heating wire (11), and the temperature controller is connected with the control panel.

5. The ion spraying device for the metal surface coating according to claim 1, wherein a heat-insulating door (12) is hinged to the side edge of the spraying box (1), the partition board is attached to the heat-insulating door (12), the heat-insulating door (12) is provided with openings (13) which are respectively installed on two sides of the partition board (3), the U-shaped supporting plates (4) are respectively arranged on the preheating chamber and the working chamber, two ends of the preheating chamber and two ends of the working chamber penetrate through the adjacent openings (13) and are connected with arc-shaped supporting frames (14), and the arc-shaped supporting frames (14) and the U-shaped supporting plates (4) form a closed loop for the transportation mechanism (7) to encircle.

6. A metal surface coating ion beam spraying apparatus as defined in claim 1, wherein said cooling means (8) comprises a plurality of cooling air ducts (801) fitted into the end of said spraying chamber (1), said cooling air ducts (801) being installed around said ion beam gun (2), said cooling air ducts (801) being connected through said spraying chamber (1) to air ducts (802), said air ducts (802) being connected to said control panel.

7. The ion spraying device for the metal surface coating according to claim 5, characterized in that the transportation mechanism (7) comprises a closed track (701) arranged on the U-shaped support plate (4) and the arc-shaped support frame (14), a plurality of clamping members (702) are arranged on the closed track (701), the bottom ends of the clamping members (702) slide on the closed track (701) through a sliding block (703), a power module is arranged between the sliding block (703) and the closed track (701), two adjacent clamping members (702) are connected together through a chain (704), and the power module is connected with the control panel;

Spring hands (705) used for fixing the metal base body are rotatably arranged at two ends of the clamping piece (702), the spring hands (705) are transversely arranged on the clamping piece (702), the spring hands (705) at one side are connected with the clamping piece (702) through rotating discs (706), and the rotating discs (706) are connected with the control panel.

8. A device for ion-spraying a metal surface coating according to claim 7, characterized in that the U-shaped support plate (4) arranged in the working chamber (6) is higher than the U-shaped support plate (4) arranged in the preheating chamber (5), the U-shaped support plate (4) being arranged inclined upwards when passing through the gap.

9. A process for ion-spraying a metal surface coating according to claims 1-8, comprising the steps of:

s100, mounting the metal base body on the clamping piece, and fixing the metal base body through the spring hand;

10. The ion spraying process of metal surface coating according to claim 9, further comprising the following steps in step S300: