阅读说明：本技术 一种等离子喷涂涂层的封孔方法 (Hole sealing method of plasma spraying coating ) 是由 陈如明 姜蕻 蔡勇 于 2020-07-27 设计创作，主要内容包括：本发明公开了一种等离子喷涂涂层的封孔方法,包括以下步骤,步骤一、预处理；步骤二、固定；步骤三、准备封孔；步骤四、开始封孔；步骤五、更换固定；步骤六、进一步封孔；步骤七、固化处理；步骤八、进一步固化,本发明涉及等离子喷涂技术领域。该等离子喷涂涂层的封孔方法,第一定位板和第二定位板交替对产品进行固定,同时通过驱动装置和万向节可以实现,产品在一定范围内晃动,保障孔隙中气体可以充分排出,解决了产品与外界驱动装置接触位置,涂层中气体的移动受到阻挡,无法排出,产品底部位置涂层空隙中的气体会因产品的压力和与产品之间的摩擦力导致无法完全排出,导致部分空隙仍然无法有效处理的问题。(The invention discloses a hole sealing method of a plasma spraying coating, which comprises the following steps of firstly, preprocessing; step two, fixing; step three, hole sealing is prepared; step four, hole sealing is started; step five, replacement and fixation; step six, further hole sealing; step seven, curing treatment; step eight, further curing, and the invention relates to the technical field of plasma spraying. The hole sealing method of the plasma spraying coating is characterized in that a first positioning plate and a second positioning plate alternately fix a product, meanwhile, the product can be realized through a driving device and a universal joint, the product rocks within a certain range, gas in holes can be fully discharged, the contact position of the product and an external driving device is solved, the movement of the gas in the coating is blocked and cannot be discharged, the gas in the coating gap at the bottom of the product can be completely discharged due to the pressure of the product and the friction force between the product, and the problem that partial gaps still cannot be effectively processed is caused.)

1. A hole sealing method of a plasma spraying coating is characterized in that: the method comprises the following steps:

step one, pretreatment: moving the product (1) after plasma spraying to a sterile dust-free room, polishing the surface of the product after plasma spraying by using abrasive paper, placing the polished product in a clean water pool, washing the product by using water flow, drying the surface of the product (1) by using a dryer, dipping clean gauze in alcohol, uniformly wiping the surface of the product (1), standing and air-drying;

step two, fixing: the product (1) is placed in the middle position inside the fixing box (2), the first electric telescopic rod (5) is controlled to extend through the control switch, the first electric telescopic rod (5) drives the first positioning plate (7) to move towards the direction close to the product (1), and the product (1) is clamped and fixed through the first positioning plate (7);

step three, hole sealing preparation: the hole sealing agent is placed in the sealing processing device, the driving device (4) drives the fixed box (2) to move through the universal joint (3), and the fixed box (2) drives the product (1) to move through the first electric telescopic rod (5) and the first positioning plate (7), so that the product (1) enters the hole sealing agent;

step four, hole sealing is started: air in the sealing processing device is pumped out through a vacuum pump, the air pressure in the sealing processing device is reduced, air in coating pores is extruded out, a hole sealing agent enters the pores, a driving device (4) drives a universal joint (3) to move in the horizontal direction, the universal joint (3) drives a fixed box (2) to shake, and the fixed box (2) drives a product (1) to shake through a first electric telescopic rod (5) and a first positioning plate (7);

step five, replacement and fixation: the second electric telescopic rod (6) is controlled to extend through the control switch, the second electric telescopic rod (6) drives the second positioning plate (8) to move towards the direction close to the product (1), the product (1) is clamped and fixed through the second positioning plate (8), and then the step two is repeated in the opposite direction, so that the first positioning plate (7) is separated from the product (1);

step six, further hole sealing: the driving device (4) moves again, the driving device (4) drives the universal joint (3) to move in the horizontal direction, the universal joint (3) drives the fixing box (2) to shake, and the fixing box (2) drives the product (1) to shake through the first electric telescopic rod (5) and the first positioning plate (7);

step seven, curing treatment: filling inert gas into the sealing processing device to enable the interior of the sealing processing device to recover to normal pressure, driving the universal joint (3) to move upwards by the driving device (4), enabling the universal joint (3) to drive the product (1) to move upwards by the aid of the fixed box (2), the second electric telescopic rod (6) and the second positioning plate (8), enabling the product (1) to be separated from the hole sealing agent, taking out the hole sealing agent, heating the interior of the sealing processing device by the aid of the heating device, and enabling the hole sealing agent to deteriorate and solidify when heated;

step eight, further curing: and step five is repeated reversely, so that the first positioning plate (7) is in close contact with the product (1), the second positioning plate (8) is separated from the product (1), and the sealant which is not completely cured at the contact position of the product (1) and the second positioning plate (8) is cured.

2. The method for sealing a plasma sprayed coating according to claim 1, wherein: the air pressure in the fourth step is reduced to 50 Pa.

3. The method for sealing a plasma sprayed coating according to claim 1, wherein: and in the seventh step, nitrogen is used as inert gas.

4. The method for sealing a plasma sprayed coating according to claim 1, wherein: and heating the temperature to 130 ℃ in the seventh step and the temperature to 1 hour in the eighth step, and keeping the temperature for 4 hours in the seventh step and 1 hour in the eighth step.

5. A device based on a hole sealing method of a plasma spraying coating comprises a product (1) and a fixed box (2), and is characterized in that: the top of the fixed box (2) is movably connected with the driving device (4) through a universal joint (3), and the inner cavity of the fixed box (2) is fixedly connected with a first electric telescopic rod (5) and a second electric telescopic rod (6).

6. The device for sealing holes based on the plasma spraying coating as claimed in claim 5, wherein: the output end of the first electric telescopic rod (5) is fixedly connected with a first positioning plate (7) which is in compression joint with the side face of the product (1).

7. The device for sealing holes based on the plasma spraying coating as claimed in claim 5, wherein: the output end of the second electric telescopic rod (6) is fixedly connected with a second positioning plate (8).

8. The device for sealing holes based on the plasma spraying coating as claimed in claim 5, wherein: the first electric telescopic rods (5) and the second electric telescopic rods (6) are eight in number, and the eight first electric telescopic rods (5) and the eight second electric telescopic rods (6) are distributed in a staggered mode.

Technical Field

The invention relates to the technical field of plasma spraying, in particular to a hole sealing method of a plasma spraying coating.

Background

Plasma spraying is a technology for strengthening and modifying the surface of a material, which can enable the surface of a product 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, and the plasma spraying technology adopts a plasma electric arc driven by direct current as a heat source to heat materials such as ceramics, alloys, metals and the like to a molten or semi-molten state and spray the materials to the surface of a workpiece subjected to pretreatment at a high speed to form a firmly-adhered surface layer, in the process of plasma spraying, pores are formed inside and on the surface of a coating due to incomplete overlapping among deformed particles, pore formation and solidification and shrinkage of the molten particles, wherein continuous pores extend from the surface to the surface of the product, the integral performance of the coating is reduced due to the existence of the pores, and meanwhile, some corrosive media reach the surface of the product through the pores to corrode the coating and the product, the accumulation of corrosion products can cause the cracking and the falling of the coating, and finally the coating fails, so the sealing treatment needs to be carried out on the coating to reduce the porosity in the coating, thereby the performance of the coating is improved.

Patent No. CN110699628A, the adoption is processed at vacuum environment, place the product in the hole sealing agent, through the negative pressure, take out gaseous in the coating space, improve the permeability of hole sealing agent, but the product need be stabilized in the hole sealing agent through external drive arrangement, product and external drive arrangement contact position, gaseous removal in the coating receives and blocks, can't discharge, and simultaneously, the gaseous of being arranged in product bottom position coating space can lead to unable complete discharge because of the pressure of product and the frictional force between the product, lead to partial space still can't effective processing.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a hole sealing method of a plasma spraying coating, which solves the problems that the gas in the coating cannot be discharged because the gas in the coating is blocked when a product is in contact with an external driving device, and the gas in the coating gap at the bottom of the product cannot be completely discharged because of the pressure of the product and the friction force between the product and the product, so that part of the gap cannot be effectively treated.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a hole sealing method of a plasma spraying coating comprises the following steps: moving the product after plasma spraying to a sterile dust-free room, polishing the surface of the product after plasma spraying by using abrasive paper, placing the polished product in a clean water tank, washing the product by using water flow, drying the surface of the product by using a dryer, dipping clean gauze in alcohol, uniformly wiping the surface of the product, standing and air-drying;

step two, fixing: placing a product in the middle position inside the fixing box, controlling the first electric telescopic rod to extend through the control switch, driving the first positioning plate to move towards the direction close to the product through the first electric telescopic rod, and clamping and fixing the product through the first positioning plate;

step three, hole sealing preparation: the hole sealing agent is placed in the sealing processing device, the driving device drives the fixed box to move through the universal joint, and the fixed box drives the product to move through the first electric telescopic rod and the first positioning plate, so that the product enters the hole sealing agent;

step four, hole sealing is started: air in the sealing processing device is pumped out through a vacuum pump, the air pressure in the sealing processing device is reduced, air in coating pores is extruded out, a hole sealing agent enters the pores, a driving device drives a universal joint to move in the horizontal direction, the universal joint drives a fixed box to shake, and the fixed box drives a product to shake through a first electric telescopic rod and a first positioning plate;

step five, replacement and fixation: the second electric telescopic rod is controlled to extend through the control switch at the same time, the second electric telescopic rod drives the second positioning plate to move towards the direction close to the product, the product is clamped and fixed through the second positioning plate, and then the second step is repeated in the reverse direction, so that the first positioning plate is separated from the product;

step six, further hole sealing: the driving device moves again, the driving device drives the universal joint to move in the horizontal direction, the universal joint drives the fixing box to shake, and the fixing box drives the product to shake through the first electric telescopic rod and the first positioning plate;

step seven, curing treatment: filling inert gas into the sealing processing device to enable the interior of the sealing processing device to recover to normal pressure, driving the universal joint to move upwards by the driving device, driving the product to move upwards by the universal joint through the fixing box, the second electric telescopic rod and the second positioning plate to enable the product to be separated from the hole sealing agent, taking out the hole sealing agent, heating the interior of the sealing processing device by the heating device, and enabling the hole sealing agent to be heated, deteriorated and solidified;

step eight, further curing: and step five is repeated reversely, so that the first positioning plate is in close contact with the product, the second positioning plate is separated from the product, and the sealant which is not completely cured at the contact position of the product and the second positioning plate is cured.

Preferably, the air pressure in the fourth step is reduced to 50 Pa.

Preferably, the inert gas in the seventh step is nitrogen.

Preferably, the temperature in step seven and step eight is heated to 130 ℃, and the temperature in step seven is kept for 4 hours and the temperature in step eight is kept for 1 hour.

The invention also discloses a device for sealing the hole based on the plasma spraying coating, which comprises a product and a fixed box, wherein the top of the fixed box is movably connected with a driving device through a universal joint, and the inner cavity of the fixed box is fixedly connected with a first electric telescopic rod and a second electric telescopic rod.

Preferably, the output end of the first electric telescopic rod is fixedly connected with a first positioning plate which is in compression joint with the side face of the product.

Preferably, the output end of the second electric telescopic rod is fixedly connected with a second positioning plate.

Preferably, first electric telescopic handle and second electric telescopic handle all set up eight, and eight first electric telescopic handle and eight crisscross distributions of second electric telescopic handle.

Advantageous effects

The invention provides a hole sealing method of a plasma spraying coating. Compared with the prior art, the method has the following beneficial effects:

1. according to the hole sealing method for the plasma spraying coating, the universal joint is driven to move in the horizontal direction through the driving device and drives the fixing box to shake, the fixing box drives the product to shake through the first electric telescopic rod and the first positioning plate, the second electric telescopic rod is controlled to extend through the control switch at the same time and drives the second positioning plate to move towards the direction close to the product, the product is clamped and fixed through the second positioning plate, and then the step two is repeated reversely, so that the first positioning plate is separated from the product. The driving device moves again, the driving device drives the universal joint to move in the horizontal direction, the universal joint drives the fixed box to rock, the fixed box drives the product to rock through the first electric telescopic rod and the first positioning plate, when the product is positioned in the hole sealing agent, negative pressure is applied, the product is fixed through the eight first positioning plates and the eight second positioning plates alternately, the eight first positioning plates and the eight second positioning plates are respectively different from the contact positions of the product, the product and the contact positions of the product and the fixed device can be fully discharged air in holes, meanwhile, the product can be rocked within a certain range through the driving device and the universal joint, the gas in the holes at the bottom positions of the product can be fully discharged, the problem that the product and an external driving device are in contact positions is solved, the gas in the coating is blocked to be discharged, and the gas in the gaps at the bottom positions of the product can not be completely discharged due to the pressure of the product and the friction force between the product and the product is solved, resulting in the problem that part of the voids still cannot be effectively treated.

2. The hole sealing method of the plasma spraying coating comprises the steps of moving a product after the product is sprayed by plasma to an aseptic dust-free chamber, polishing the surface of the product after the plasma spraying by using abrasive paper, placing the product after polishing in a clean water tank, washing by water flow, drying the surface of the product by using a dryer, dipping clean gauze in alcohol, uniformly wiping the surface of the product, standing and air-drying, polishing the surface by using the abrasive paper before hole sealing, removing a large lug of a local protruding part on the surface of the coating, keeping the surface of the product smooth, respectively cleaning by using clean water and alcohol, ensuring that no other particulate matters remain on the surface of the product, and ensuring that no bulge is generated when the product is in contact with hole sealing liquid.

3. The hole sealing method of the plasma spraying coating is characterized in that inert gas is filled into a sealing processing device, so that the inside of the sealing processing device is recovered to normal pressure, a driving device drives a universal joint to move upwards, the universal joint drives a product to move upwards through a fixed box, a second electric telescopic rod and a second positioning plate, the product is separated from a hole sealing agent, the hole sealing agent is taken out, heating the sealing processing device by a heating device, heating the sealant to deteriorate and solidify, repeating the fifth step in reverse direction to enable the first positioning plate to be in close contact with the product, separating the second positioning plate from the product, solidifying the sealant which is not completely solidified at the contact position of the product and the second positioning plate, when the hole sealing agent is cured, the product is fixed through the first positioning plate and the second positioning plate alternately in the same mode of fully contacting the product and the hole sealing liquid, and the hole sealing liquid at different positions can be fully cured.

Drawings

Fig. 1 is a schematic view of the external structure of the present invention.

In the figure, 1, product; 2. a fixing box; 3. a universal joint; 4. a drive device; 5. a first electric telescopic rod; 6. two electric telescopic rods; 7. a first positioning plate; 8. and a second positioning plate.

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.

Referring to fig. 1, an embodiment of the present invention provides a technical solution: a hole sealing method of a plasma spraying coating comprises the following steps: moving the product 1 after plasma spraying to a sterile dust-free room, polishing the surface of the product after plasma spraying by using abrasive paper, placing the polished product in a clean water pool, washing the product by using water flow, drying the surface of the product 1 by using a dryer, dipping clean gauze in alcohol, uniformly wiping the surface of the product 1, standing and air-drying;

step two, fixing: the product 1 is placed in the middle position inside the fixing box 2, the first electric telescopic rod 5 is controlled to extend through the control switch, the first electric telescopic rod 5 drives the first positioning plate 7 to move towards the direction close to the product 1, and the product 1 is clamped and fixed through the first positioning plate 7;

step three, hole sealing preparation: the hole sealing agent is placed in the sealing processing device, the driving device 4 drives the fixed box 2 to move through the universal joint 3, and the fixed box 2 drives the product 1 to move through the first electric telescopic rod 5 and the first positioning plate 7, so that the product 1 enters the hole sealing agent;

step four, hole sealing is started: air in the sealing processing device is pumped out through a vacuum pump, the air pressure in the sealing processing device is reduced to 50Pa, air in coating pores is extruded out, a hole sealing agent enters the pores, a driving device 4 drives a universal joint 3 to move in the horizontal direction, the universal joint 3 drives a fixed box 2 to shake, the fixed box 2 drives a product 1 to shake through a first electric telescopic rod 5 and a first positioning plate 7, and the air in the pores is accelerated to be discharged through shaking;

step five, replacement and fixation: the second electric telescopic rod 6 is controlled to extend through the control switch, the second electric telescopic rod 6 drives the second positioning plate 8 to move towards the direction close to the product 1, the product 1 is clamped and fixed through the second positioning plate 8, and then the step two is repeated in the reverse direction, so that the first positioning plate 7 is separated from the product 1;

step six, further hole sealing: the driving device 4 moves again, the driving device 4 drives the universal joint 3 to move in the horizontal direction, the universal joint 3 drives the fixed box 2 to shake, the fixed box 2 drives the product 1 to shake through the first electric telescopic rod 5 and the first positioning plate 7, and the discharge of air in the pores is accelerated through shaking;

step seven, curing treatment: filling inert gas into the sealing processing device, wherein the inert gas adopts nitrogen to restore the normal pressure in the sealing processing device, driving the universal joint 3 to move upwards by the driving device 4, driving the product 1 to move upwards by the universal joint 3 through the fixed box 2, the second electric telescopic rod 6 and the second positioning plate 8, separating the product 1 from the hole sealing agent, taking out the hole sealing agent, heating the sealing processing device by the heating device, heating the sealing processing device to 130 ℃, keeping the temperature for 4 hours, and heating the hole sealing agent to deteriorate and solidify;

step eight, further curing: and step five is repeated reversely, so that the first positioning plate 7 is tightly contacted with the product 1, the second positioning plate 8 is separated from the product 1, the sealant which is not completely cured at the contact position of the product 1 and the second positioning plate 8 is cured, the temperature is heated to 130 ℃, and the sealant is kept for 1 hour.

The invention also discloses a device based on the hole sealing method of the plasma spraying coating, which comprises a product 1 and a fixed box 2, wherein the top of the fixed box 2 is movably connected with a driving device 4 through a universal joint 3, the inner cavity of the fixed box 2 is fixedly connected with a first electric telescopic rod 5 and a second electric telescopic rod 6, the first electric telescopic rod 5 and the second electric telescopic rod 6 are both electrically connected with an external power supply, the output end of the first electric telescopic rod 5 is fixedly connected with a first positioning plate 7 which is in compression joint with the side surface of the product 1, the output end of the second electric telescopic rod 6 is fixedly connected with a second positioning plate 8, the first electric telescopic rod 5 and the second electric telescopic rod 6 are respectively provided with eight parts, the eight parts of the first electric telescopic rods 5 are controlled by the same control switch, the eight parts of the second electric telescopic rods 6 are controlled by another control switch, so as to realize the synchronous movement of the eight parts of the first driving telescopic rods 5, eight second electric telescopic handle 6 synchronous motion, and eight first electric telescopic handle 5 and eight crisscross distributions of second electric telescopic handle 6.

And those not described in detail in this specification are well within the skill of those in the art.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.