WO2022178984A1

WO2022178984A1 - Coating surface modification device based on thermal spraying process and working method

Info

Publication number: WO2022178984A1
Application number: PCT/CN2021/093415
Authority: WO
Inventors: 李方义; 杨宝娟; 李燕乐; 冉学举; 鹿海洋; 张兴艺
Original assignee: 山东大学
Priority date: 2021-02-23
Filing date: 2021-05-12
Publication date: 2022-09-01
Also published as: CN112974071A; CN112974071B

Abstract

The present invention discloses a coating surface modification device based on a thermal spraying process and a working method, solves the problems in the prior art of surface oxidation and non-uniformity of a coating, and achieves the beneficial effects of reducing surface oxidation and residual stress of a workpiece. The specific solution is as follows: the coating surface modification device based on a thermal spraying process comprises a shell, wherein a cavity is formed in the shell, a moving mechanism is provided on the inner side or the outer side of the shell, an opening is formed in the side of the shell, the moving mechanism can drive the workpiece to penetrate through the opening to realize movement, protective gas can be introduced into the shell, and an elastic feeding and discharging mechanism is provided on the opening side of the shell, such that it can be guaranteed that the workpiece enters the cavity in the shell, and the sealing performance of the shell can be guaranteed; a spray gun provided on the outer side of the shell; and a temperature control unit comprising a heating control component mounted on the shell to control the ambient temperature in the shell.

Description

A coating surface modification device and working method based on thermal spraying process

technical field

The invention relates to the technical field of surface engineering, in particular to a coating surface modification device and a working method based on a thermal spraying process.

Background technique

The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

Plasma spraying technology uses a DC-driven plasma arc as a heat source to heat ceramics, alloys, metals and other sprayed materials to a molten or semi-molten state, forming a cluster of high-speed molten particle flow (droplet flow), which is sprayed at high speed towards the passing A technology in which the pretreated substrate surface is deformed by the lateral flow of particles, rapidly cooled and solidified, and continuously deposited on the substrate surface to form a coating. After being treated by plasma spraying technology, the coating has a layered structure, which endows the workpiece surface with excellent properties such as wear resistance and corrosion resistance.

However, the conventional plasma spraying is carried out in the spraying room, and the sprayed particles are easily oxidized during the spraying to the surface of the substrate. There are oxides in the obtained coating, and the coating has a layered structure, so incomplete filling and shading effects are unavoidable. The surface will produce defects such as pores and cracks; after spraying, the molten particles are rapidly cooled on the surface of the substrate, so that the liquid molten particles cannot be fully wetted with the solidified particles to form a complete bond, and there are a large number of unbonded interfaces between the stacked particles; On the one hand, the rapid cooling of the molten particles will cause a high residual stress between the coating and the metal substrate interface, which is easy to cause cracking and affect the application range and service life of the coating during service.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a coating surface modification device based on thermal spraying process, which can improve the surface properties of the workpiece and reduce the surface oxidation, porosity and residual stress of the workpiece.

In order to achieve the above object, the present invention is realized by the following technical solutions:

A coating surface modification device based on thermal spraying process, comprising:

The casing has a chamber, the inner or outer side of the casing is provided with a moving mechanism, the side of the casing is provided with an opening, the moving mechanism can drive the workpiece to move through the opening, and a protective gas can be introduced into the casing, and the casing is set on the side of the opening The elastic entry and exit mechanism ensures that the workpiece enters the inner chamber of the shell and ensures the sealing of the shell;

Spray gun, the spray gun is arranged on the outside of the shell, and the spray gun can be moved;

The temperature control unit includes a heating control component mounted on the casing to control the ambient temperature in the casing.

A coating surface modification device based on a thermal spraying process as described above, an elastic seal is arranged in contact with the upper and lower parts of the casing opening, and the two elastic seals arranged up and down can be placed between the two elastic seals during the process of the workpiece passing through the casing opening. Space is provided, and the sealing performance at the opening of the casing can be ensured by the arrangement of the elastic seal.

A coating surface modification device based on a thermal spraying process as described above, the elastic entry and exit mechanism includes a rotatable roller, one side of the roller is provided with a plurality of elastic members arranged side by side, and one end of the elastic member is connected to the casing. The connection between the elastic member and the roller can provide space during the process of the workpiece passing through the opening of the casing, and due to the arrangement of the elastic member, the passage of workpieces of different thicknesses into the relatively sealed chamber of the casing can be realized.

A coating surface modification device based on a thermal spraying process as described above, wherein the casing comprises a detachable top plate, and the inner surface of the top plate is provided with an interface for accommodating one end of the elastic member;

And the elastic member is a spring, one end of the spring is clamped into the interface of the top plate, the bolt is arranged through the inner side of the elastic member, the head of the bolt is exposed at the end of the elastic member away from the top plate, and the head of the bolt is provided with a tapered roller, and the tapered roller is connected with the above. The rollers are in contact, and the arrangement of the bolts facilitates the arrangement of the tapered rollers. The central axis of the tapered rollers is arranged along the length direction of the casing, and the end with the smaller diameter of the tapered rollers is arranged towards the opening side of the casing.

A coating surface modification device based on a thermal spraying process as described above, the heating control component comprises a heating resistor installed on the housing, the heating resistor is connected with a current controller, the housing is provided with a temperature sensor, and the current controls The controller and the temperature sensor are respectively connected with the controller, and the temperature of the environment in the casing can be ensured through the heating resistor.

A coating surface modification device based on a thermal spraying process as described above, the temperature control unit further includes a cooling component, and the cooling component includes a cooling liquid inlet and a cooling liquid outlet provided on the housing, the cooling liquid inlet, The cooling liquid outlets are all connected with the cooling liquid pipes, and the cooling speed of the casing can be accelerated through the cooling components.

The above-mentioned coating surface modification device based on thermal spraying process, in order to supply protective gas to the shell, the shell is provided with a gas interface, the gas interface is connected with the gas cylinder, and the connecting pipe between the gas cylinder and the gas interface Install air pressure control components on the road;

The air pressure control part and the moving mechanism are respectively connected with the controller, and the controller is the general control unit of the device.

The above-mentioned coating surface modification device based on thermal spraying process, in order to save the installation space of the device, the moving mechanism is a lead screw mechanism arranged in the housing, and the lead screw mechanism includes a motor, a motor and a lead screw. connection, the lead screw is provided with a baffle plate, and the baffle plate and the workpiece are detachably connected by fasteners;

The moving direction of the spray gun is perpendicular to the moving direction of the moving mechanism.

The above-mentioned coating surface modification device based on thermal spraying process, in order to ensure reliable support and fixation of the workpiece, the two sides of the spray gun are respectively provided with the described shells, and each shell is respectively provided with the described shells. temperature control unit;

The openings are respectively provided on the adjacent sides of the casings on both sides of the spray gun, and the openings of the two casings are arranged on the same plane.

In the second aspect, the present invention also provides a working method of a coating surface modification device based on a thermal spraying process, including the following:

Install the workpiece through the moving mechanism;

Introduce the protective gas of the set pressure into the shell;

The heating control part is turned on, so that the temperature in the casing reaches the set temperature;

Open the spray gun for plasma spraying on the workpiece;

The moving mechanism drives the sprayed part of the workpiece into the casing chamber through the casing opening, the protective gas in the casing prevents the coating from oxidizing, and the set temperature in the casing makes the coating more dense;

After spraying, adjust the temperature of the heating control part so that the temperature in the shell cools slowly until it reaches room temperature, and then stop heating the control part.

The above-mentioned beneficial effects of the present invention are as follows:

1) In the present invention, the inert gas can be introduced into the shell, so that after the workpiece is plasma sprayed, the sprayed part can quickly enter the inert gas environment in the shell, which can effectively reduce the oxidation of the coating and ensure the purity of the coating. performance.

2) In the present invention, through the setting of the temperature control unit, the heating control component can heat the environment in the casing. After the spraying is completed, the controllable temperature environment can keep the temperature in the chamber at the set temperature, cool down slowly, and reduce the temperature caused by the temperature. Residual stress brought by quenching to the surface, thereby improving its comprehensive performance and increasing service life.

3) The present invention can improve the performance of the part that has been sprayed into the shell when the part of the workpiece has not been sprayed through the setting of the overall structure. Compared with the post-treatment process, the coating performance of the workpiece during the spraying process is improved. The improvement is faster and easier to achieve, and considering that the surface of the workpiece has a set temperature just after spraying, it is sent into the shell for modification without cooling to room temperature, and the overall energy consumption is lower.

4) In the present invention, an elastic seal is arranged at the opening of the casing, and an elastic entry and exit mechanism is arranged inside the opening of the casing to form a channel for the lateral movement of the workpiece. The use of the elastic seal and the spring can adapt to the entry and exit of workpieces of different thicknesses. To ensure the atmosphere of the inner environment of the shell chamber, on the other hand, when the workpiece enters and leaves the shell, the elastic seals, springs, tapered rollers and rollers will produce a certain degree of rolling on the workpiece. This passive pressure can make the solidification process. The droplets are more firmly combined with the substrate, effectively reducing defects such as pores and cracks in the coating, and making the coating more dense.

5) The present invention drives the workpiece to move laterally through the moving mechanism, so that the spray gun can be provided with a one-way longitudinal movement, so that the spray gun and the workpiece each undertake one direction of movement, avoiding the traditional plasma spraying. It can also prevent local hot spots and surface oxidation in the coating during the spraying operation.

Description of drawings

The accompanying drawings, which form a part of the present invention, are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute an improper limitation of the present invention.

FIG. 1 is a schematic diagram of a coating surface modification device based on a thermal spraying process according to one or more embodiments of the present invention.

FIG. 2 is a schematic diagram of removing a top plate from a shell in a coating surface modification device based on a thermal spraying process according to one or more embodiments of the present invention.

FIG. 3 is a schematic diagram of an elastic sealing member provided in the casing opening of a coating surface modification device based on a thermal spraying process according to one or more embodiments of the present invention.

Fig. 4 is a schematic diagram showing the arrangement of the elastic entry and exit mechanism of a coating surface modification device based on a thermal spraying process in a casing according to one or more embodiments of the present invention.

5 is a schematic diagram of a top plate of a coating surface modification device based on a thermal spraying process according to one or more embodiments of the present invention.

FIG. 6 is a schematic diagram of the temperature control unit of a coating surface modification device based on a thermal spraying process according to one or more embodiments of the present invention, which is arranged in a casing.

In the figure: The distance or size between each other is exaggerated to show the position of each part, and the schematic diagram is only for illustration.

Among them: 1. Spray gun, 2. Workpiece, 3. Top plate, 4. Housing, 5. Side plate, 6. Sealing strip, 7. Spring, 8. Bolt, 9. Tapered roller, 10. Roller, 11. Baffle, 12. Lead screw, 13. Motor, 14. Spring interface, 15. Thermocouple, 16. Temperature controller, 17. Heating resistor, 18. Current controller, 19. Coolant inlet, 20. Coolant outlet , 21. Gas interface, 22. Pressure gauge, 23. Pressure reducing valve.

Detailed ways

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the invention clearly dictates otherwise, the singular is intended to include the plural as well, and it is also to be understood that when the terms "comprising" and/or "including" are used in this specification, Indicate the presence of features, steps, operations, devices, components and/or combinations thereof;

For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, it only means that the directions of up, down, left and right are consistent with the drawings themselves, and do not limit the structure. It is only for the convenience of describing the present invention and simplifying the description, not to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

Terminology explanation part: the terms "installation", "connection", "connection", "fixation" and other terms in the present invention should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated; It can be a mechanical connection, it can also be an electrical connection, it can be a direct connection, it can also be indirectly connected through an intermediate medium, it can be an internal connection between two elements, or an interaction relationship between two elements, for those of ordinary skill in the art. , the specific meanings of the above terms in the present invention can be understood according to specific situations.

As described in the background art, there is a problem in the prior art that the surface performance of the workpiece needs to be improved during the plasma spraying process. In order to solve the above technical problem, the present invention proposes a coating surface modification device based on a thermal spraying process.

Example 1

In a typical embodiment of the present invention, as shown in FIG. 1 , a coating surface modification device based on a thermal spraying process includes a casing 4, and the casing 4 has a chamber inside, and the chamber has a set Width, length and height, the shell provides the basis for the adjustment of a certain inert gas atmosphere, temperature and pressure environment for the workpiece during the plasma spraying process.

The inside or outside of the casing 4 is provided with a moving mechanism, and the side plate 5 on the side of the casing is provided with an opening. The moving mechanism can drive the workpiece 2 to pass through the opening to achieve movement. The casing can be filled with protective gas, and the casing is provided with an elastic entry and exit mechanism on the side of the opening. , to ensure that the workpiece 2 enters the inner chamber of the casing and ensures the sealing of the casing; the spray gun 1, the spray gun 1 is arranged outside the casing 4; the temperature control unit includes a heating control component installed on the casing to control the ambient temperature in the casing.

It should be noted that, in this embodiment, the protective gas is an inert gas.

The two sides of the spray gun are respectively provided with shells 4, and each shell 4 is respectively provided with a temperature control unit; the adjacent sides of the shells on both sides of the spray gun (that is, the sides close to the spray gun) are respectively provided with openings. When the two shells are arranged horizontally, The openings of the two shells are arranged on the same horizontal plane; when in use, the two shells are arranged on the workbench, and the workbench has a set height, which is convenient for the staff to operate.

The side plate 5 is located on one side of the housing 4, and the side plate is installed with elastic seals arranged oppositely up and down at the rectangular opening. When the strips 6 are in the middle, the two elastic sealing strips 6 are extruded and deformed to perform lateral movement between the two shells 4 through the opening of the side plate 5 .

Further, the elastic entry and exit mechanism includes a roller 10. Referring to FIG. 4, the roller 10 is arranged in the casing 4, and the rotatable roller 10 is supported by the casing. The central axis of the roller 10 is along the width of the casing. Direction setting, one side of the roller is provided with several elastic pieces arranged side by side, the elastic piece is vertically arranged, one end of the elastic piece is connected with the shell, the elastic piece is a spring 7, the rod body of the bolt 8 is arranged through the inner side of the elastic piece, and the head of the bolt is exposed. At the end of the elastic piece away from the top plate, and the head of the bolt can be fixed with the end of the spring close to it, and each bolt head is provided with two tapered rollers, the two tapered rollers are arranged side by side, the tapered roller 9 and the roller The space between the wheels can provide space for the lateral movement of the workpiece during the process of the workpiece passing through the opening of the casing;

In order to facilitate the entry of the workpiece into the housing, the central axis of the tapered roller is arranged along the length direction of the housing, and the end with the smaller diameter of the tapered roller is arranged toward the opening side of the housing.

When the workpiece 2 passes through the elastic entry and exit mechanism, the workpiece pushes up the tapered roller 9, the spring 7 shrinks, and the roller 10 rotates passively, forming an entry and exit channel for the workpiece 2 to move laterally between the two shells 4, thereby forming the entry and exit of workpieces with different thicknesses. The elastic mechanism realizes the passage of workpieces of different thicknesses.

In other examples, the springs and bolts can be replaced by dampers, the dampers are oil dampers, the fixed ends of the dampers are connected with tapered rollers, the telescopic ends of the dampers can be embedded in the circular grooves of the top plate, and the dampers are Hydraulic parts can realize the controllable adjustment of the workpiece pressure.

In other examples, a pressure sensor is arranged in the circular groove of the top plate, the damper is an electric cylinder or a hydraulic cylinder or an air cylinder, and the pressure sensor is arranged between the electric cylinder or the hydraulic cylinder or the telescopic end of the cylinder and the top plate, the electric cylinder or the hydraulic cylinder Or the cylinder and the pressure sensor are respectively connected to the controller, one or more pressure sensors can be set, and the controller controls the electric cylinder or hydraulic cylinder or the expansion and contraction of the cylinder according to the feedback signal of the pressure sensor (multiple pressure sensors can take the average value) to Ensure the pressure of the tapered roller on the roller (to realize the pressure control of the tapered roller on the surface of the workpiece).

A top plate 3 is provided on the top of the casing, and the top plate 3 is detachable relative to the casing. When the top plate is opened, the installation of the workpiece can be facilitated. The top plate is located on the upper surface of the casing. Specifically, the top plate is flat and can be fastened with the casing by screws. connect.

Referring to FIG. 2, a moving mechanism is installed in the housing 4. The moving mechanism includes a motor 13 and a lead screw 12. The motor 13 drives the lead screw 12 to rotate, the lead screw is provided with a baffle plate, and the lead screw 12 drives the baffle plate 11 to move laterally. The workpiece 2 is fixed to the baffle plate 11 by means of fasteners, and the two baffle plates 11 in the housings on both sides drive the workpiece 2 to move laterally, thereby forming a lateral movement control mechanism.

In some specific examples, the longitudinal section of the baffle can be L-shaped, and the L-shaped baffle can not only effectively support the end of the workpiece, but also facilitate the connection and fixation of the workpiece and the baffle by fasteners such as bolts and nuts; of course, The baffles in the two shells are arranged opposite to each other.

Referring to FIG. 6 , the heating control component includes at least one set of heating resistors 17, the housing is provided with a temperature sensor, the temperature sensor is a thermocouple 15, the two ends of the thermocouple are located in the housing cavity, and the heating resistor is connected to the current controller 18, The current controller can be arranged outside the casing, the thermocouple is connected to the temperature controller 16 arranged outside the casing, and the current controller 18 and the temperature controller are respectively connected to the controller.

In some examples, the heating resistor can be a plurality of heating resistors with different resistance materials, so that different resistance materials can be used to control the temperature in the cavity, and the requirements of different coatings for temperature levels can be met.

Further, the temperature control unit also includes a cooling component, and the cooling component includes a cooling liquid inlet 19 and a cooling liquid outlet 20 arranged on the housing, the cooling liquid inlet and the cooling liquid outlet are connected with the cooling liquid pipeline, and the cooling liquid inlet is connected to the cooling liquid. into the cooling liquid to facilitate rapid cooling of the housing; in some examples, a cooling liquid pump (specifically, a water pump) is provided in the cooling pipeline, and the cooling pump is connected to the temperature controller;

By controlling the temperature of the shell, a specific temperature environment is created for the shell, so that the particles are more firmly bonded to the matrix when they are melted, effectively reducing the layered structure of the coating and the density of pores and cracks in the coating, so that the coating has better performance.

The shell 4 is provided with a gas interface 21, and the gas interface 21 is connected to the gas cylinder outside the shell 4, the air pressure control component such as the pressure reducing valve 23, etc., and the shell 4 can be continuously filled with argon gas through the gas bottle and the air pressure control component. The protective gas provides an inert gas environment for the workpiece during the plasma spraying process, forming an inert gas protective atmosphere in the shell.

A plurality of gas ports 21 can be provided, and the gas ports are connected with the gas cylinder through a connecting pipeline, and the connecting pipeline is provided with a pressure gauge 22 and a pressure reducing valve 23 .

Of course, it should be noted that the air pressure control part and the moving mechanism are respectively connected with the controller, and the control of each part is realized through the controller. Of course, the controller can also be connected with the spray gun to control the action of the spray gun.

It should be noted that the controller may be a PLC controller or an industrial computer, and components such as a temperature controller and a pressure reducing valve are all in the prior art and will not be described again.

Specifically, the top plate 3 is installed on the top of the casing 4 to provide a closed environment for the casing 4; with reference to FIG. 14. When the top plate is installed on the casing, the interface corresponds to the setting of the spring one by one, the top of the spring is snapped into the interface to provide a reliable position for the one-way expansion and contraction of the spring 7, and when the top plate is opened, the spring, bolt and tapered roller are moved to facilitate the installation of the workpiece.

In addition, the spray gun is a plasma spray gun. The plasma spray gun is located in the middle of the two symmetrically placed shells. The one-way movement of the spray gun is controlled by a mechanical arm or other control mechanism such as a mobile unit to realize longitudinal displacement spraying. The workpiece is controlled by the moving mechanism. Displacement movement, so that the workpiece and the spray gun each undertake the movement in one direction, which avoids the quality change of the spray coating caused by the speed change of the robot arm at the inflection point.

When the device is used for spraying, the installation position of the workpiece 2 is to pass through the middle of the two sealing strips 6 of the side plates 5 of the two shells 4, between the tapered rollers 9 and the rollers 10, and pass through the baffles 11 in the two shells 4. firmware connection;

Specifically, in some examples, the inert gas is argon gas, the gas cylinder is an argon gas cylinder, and the gas interface 21 is connected to the argon gas cylinder.

Before the spray gun works, open the argon gas bottle, control the pressure of argon gas to 0.7MPa and the flow rate of argon gas to 50L/min, and form an argon gas protection environment in the shell 4. Then, the temperature controller 16 is turned on, the current is adjusted, and the temperature of the heating resistor 17 is controlled to be 300° C., while the change of the air pressure in the casing 4 is paid attention to.

A working method of a coating surface modification device based on a thermal spraying process, comprising the following contents:

Open the top plate of the shell, support the workpiece through the baffle plate of the moving mechanism, and fasten the baffle plate and the workpiece through fasteners;

Introduce the protective gas of the set pressure into the shell;

After the temperature and air pressure in the housing 4 reach the set requirements, turn on the spray gun 1 for plasma spraying. The spray gun can be connected to the existing mechanical arm, and the mechanical arm controls its longitudinal displacement (along the width of the workpiece), and starts the motor at the same time. 13. Control the lateral movement of workpiece 2;

During the plasma spraying process, due to the existence of the protective gas in the shell 4, the oxidation of the coating can be effectively avoided; the high temperature environment in the shell 4 can make the combination of the molten particles and the substrate stronger, and make the coating more uniform and dense;

After spraying, first close the spray gun 1, and then adjust the heating temperature of the heating resistor 17, so that the temperature in the housing 4 is slowly cooled until it reaches room temperature, the heating resistor 17 stops working, and finally the argon cylinder is closed.

Considering that the workpiece has a set length, shells are installed on both sides of the spray gun. In this way, after the middle section of the workpiece is sprayed, the workpiece first enters the shell on one side for surface modification. After the modification work on this side is completed, The moving mechanism moves in the opposite direction, and the above steps continue to be repeated, and the workpiece enters the shell on the other side for surface modification work.

In addition, because the baffle plate and the workpiece are fixed, the two sides of the workpiece cannot be sprayed on the outside of the shell. After the spraying and modification of the middle area of the workpiece is completed, spraying can be performed separately; or, after the spraying and modification of the middle area of the workpiece is completed , trim off the excess on both sides.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

A coating surface modification device based on thermal spraying process is characterized in that, comprising:

The casing has a chamber, a moving mechanism is arranged inside or outside the casing, an opening is arranged on the side of the casing, the moving mechanism can drive the workpiece to move through the opening, and a protective gas can be introduced into the casing, and the casing is set on the side of the opening The elastic entry and exit mechanism ensures that the workpiece enters the inner chamber of the shell and ensures the sealing of the shell;

Spray gun, the spray gun is arranged on the outside of the shell, and the spray gun can be moved;

The temperature control unit includes a heating control component mounted on the casing to control the ambient temperature in the casing.
A coating surface modification device based on a thermal spraying process according to claim 1, wherein an elastic seal is arranged in contact with the upper and lower parts of the casing opening, and the two elastic seals arranged up and down can be placed between the two elastic seals. Provide space during the opening through the housing.
A coating surface modification device based on a thermal spraying process according to claim 1, characterized in that the elastic entry and exit mechanism comprises a rotatable roller, and one side of the roller is provided with a plurality of elastic members arranged side by side, and the elastic One end of the piece is connected with the casing, and a space can be provided between the elastic piece and the roller when the workpiece passes through the opening of the casing.
A coating surface modification device based on a thermal spraying process according to claim 3, wherein the housing comprises a detachable top plate, and the inner surface of the top plate is provided with an interface for accommodating one end of the elastic member;

And the elastic member is a spring, one end of the spring is clamped into the interface of the top plate, the bolt is arranged through the inner side of the elastic member, the head of the bolt is exposed at the end of the elastic member away from the top plate, and the head of the bolt is provided with a tapered roller, and the tapered roller is connected with the above. roller contact.
A coating surface modification device based on a thermal spraying process according to claim 1, wherein the heating control component comprises a heating resistor mounted on the casing, the heating resistor is connected to the current controller, and the casing The body is provided with a temperature sensor, and the current controller and the temperature sensor are respectively connected with the controller.
A coating surface modification device based on a thermal spraying process according to claim 1, wherein the temperature control unit further comprises a cooling part, and the cooling part comprises a cooling liquid inlet and a cooling liquid inlet provided on the casing. The liquid outlet, the cooling liquid inlet and the cooling liquid outlet are all connected with the cooling liquid pipeline.
A coating surface modification device based on thermal spraying process according to claim 5, characterized in that, the shell is provided with a gas interface, the gas interface is connected with the gas cylinder, and the connection pipeline between the gas cylinder and the gas interface is provided with a gas interface. Air pressure control parts;

The air pressure control part and the moving mechanism are respectively connected to the controller.
A coating surface modification device based on a thermal spraying process according to claim 1, wherein the moving mechanism is a screw mechanism arranged in the casing, and the screw mechanism comprises a motor, the motor and the screw The screw is connected, the lead screw is provided with a baffle, and the baffle is detachably connected with the workpiece through fasteners;

The moving direction of the spray gun is perpendicular to the moving direction of the moving mechanism.
A coating surface modification device based on a thermal spraying process according to claim 1, characterized in that the shells are respectively provided on both sides of the spray gun, and the temperature control device is respectively provided for each shell. unit;

The openings are respectively provided on the adjacent sides of the casings on both sides of the spray gun, and the openings of the two casings are arranged on the same plane.
A kind of working method of the coating surface modification device based on thermal spraying process according to any one of claims 1-9, is characterized in that, comprises the following content:

Install the workpiece through the moving mechanism;

Introduce the protective gas of the set pressure into the shell;

The heating control part is turned on, so that the temperature in the casing reaches the set temperature;

Open the spray gun for plasma spraying on the workpiece;

The moving mechanism drives the sprayed part of the workpiece into the casing chamber through the casing opening, the protective gas in the casing prevents the coating from oxidizing, and the set temperature in the casing makes the coating more dense;

After spraying, adjust the temperature of the heating control part so that the temperature in the shell cools slowly until it reaches room temperature, and then stop heating the control part.