Plasma powder surfacing welding machine

Abstract

The invention discloses a plasma powder surfacing welding machine, and relates to the technical field of plasma welding, a turntable is rotatably mounted in a tank body, a plurality of quantitative through holes with the same size are uniformly distributed in the turntable in a surrounding manner, negative pressure suction generated in a vacuum generator is matched, and when the quantitative through holes are communicated between a first connecting pipe and a second connecting pipe, the quantitative through holes are uniformly distributed in the turntable in a surrounding manner; metal powder can be sucked into a quantitative through hole to be quantitatively stored, then when the quantitative through hole is communicated between a through hole and a third connecting pipe, the quantitative metal powder is rapidly input into a powder spraying hole to be sprayed out, and the quantitative through hole is driven to rotate at a constant speed by means of quantitative temporary storage of the quantitative through hole and a rotating disc; and the phenomenon that feeding is not uniform under long-distance conveying of metal powder can be avoided, the precision and stability of powder feeding and feeding of the device can be improved, and then the plasma powder surfacing machining effect can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of plasma welding, in particular to a plasma powder cladding machine. Background Art

[0002] Plasma powder cladding machine is a plasma welding device that clads metal powder on the surface of a metal workpiece. It can form an alloy layer with special properties on the surface of the metal workpiece, which can significantly improve the wear resistance, corrosion resistance, high temperature resistance and other properties of the parts. It is widely used in existing metal parts processing.

[0003] In the plasma powder cladding process, the feeding accuracy of metal powder plays a vital role in the quality and stability of cladding. At present, most of the existing plasma powder cladding machines adopt a simple airflow suction powder feeding method. This powder feeding method mainly relies on the negative pressure generated by the high-speed airflow to suck the powder into the powder feeding pipeline and transport it to the cladding area. During the long-distance transportation process, the movement of the powder in the airflow is easily affected by factors such as the shape, particle size, humidity of the powder, and the speed and pressure of the airflow. As a result, when the airflow feeds powder in the existing plasma powder cladding machine, powder agglomeration and blockage are likely to occur, resulting in the powder feeding process being not uniform and accurate, which easily causes the problem of uneven thickness of the cladding layer, affecting the cladding quality and product reliability.

[0004] Therefore, a plasma powder cladding machine is proposed to solve some problems existing in the above-mentioned prior art. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the plasma powder cladding machine in the prior art uses simple airflow suction to feed the powder, resulting in the supply of metal powder not being uniform and accurate during long-distance transportation, which easily affects the quality of cladding, and proposes a plasma powder cladding machine.

[0006] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions: A plasma powder surfacing welding machine comprises a machine platform, a support arm is fixedly installed on the top of the machine platform, and a plasma surfacing welding machine body is fixedly installed on the front of the support arm, a surfacing welding head is fixedly installed on the lower end of the plasma surfacing welding machine body, and a plasma generator is installed in the surfacing welding head, a concave cavity is opened at the bottom of the surfacing welding head, and a powder spraying hole is opened in the concave cavity, a cavity connected to the top of the plasma generator is opened in the plasma surfacing welding machine body, a tank body is fixedly installed in the cavity, and a turntable is rotatably installed in the tank body, and a plurality of evenly distributed quantitative through holes are opened around the turntable, a first pipe is fixedly installed on the left side of the top of the tank body, and the first pipe is connected to the bottom of the powder tank, a second pipe is fixedly installed on the left side of the bottom of the tank body, and a filter screen is installed at the connection between the second pipe and the tank body, a through hole is opened on the right side of the top of the tank body, and a filter screen is installed in the through hole, a third pipe is fixedly installed on the right side of the bottom of the tank body, a uniform speed motor is fixedly installed in the cavity, and a vacuum generator is installed on the outer end wall of the plasma surfacing welding machine body.

[0007] Preferably, the cavity is arranged as an inverted conical structure, the bottom end of the plasma generator is connected to the axial position of the top of the cavity, a plurality of powder spraying holes are provided, and the plurality of powder spraying holes are evenly distributed around the bottom end of the plasma generator, and the lower ends of the plurality of powder spraying holes are inclined toward the central axis of the plasma generator.

[0008] Preferably, a diversion chamber connected with a plurality of powder injection holes is provided around the surfacing head, and the diversion chamber is connected with the gas outlet direction of the vacuum generator, and a turbine is rotatably installed in the diversion chamber.

[0009] Preferably, an annular spray chamber is provided at the bottom of the surfacing head and is arranged around the outside of the concave cavity. The lower end of the annular spray chamber is arranged as a cylindrical structure with equal upper and lower inner diameters and equal upper and lower outer diameters. A plurality of surrounding partition plates are fixedly installed at the lower part of the annular spray chamber.

[0010] Preferably, an air supply assembly is installed on the back of the machine, a powder tank is installed on the outer end wall of the machine, and a processing table is installed on the top of the machine. There are multiple tank bodies, and the multiple tank bodies are evenly distributed in the cavity from top to bottom. There are also multiple powder tanks, and the number of powder tanks is the same as the number of tank bodies. A first connecting pipe fixed on a tank body is fixedly connected to the bottom of a powder tank.

[0011] Preferably, a micro transmission is fixedly installed at the bottom of each tank body, and the output shaft of the micro transmission is connected to the turntable in the corresponding tank body. A vertically arranged transmission shaft is rotatably installed in the cavity, and the transmission shaft is connected to the drive shaft of the uniform speed motor, and the input shaft of the micro transmission is connected to the transmission shaft.

[0012] Preferably, the first connecting pipes and the second connecting pipes on the adjacent surfaces of two upper and lower adjacent tank bodies are arranged in a staggered manner front to back.

[0013] Preferably, the vacuum generator includes a vacuum generator body fixedly mounted on the outer end wall of the plasma surfacing body, and a vertically arranged air inlet pipe is provided at the upper end of the vacuum generator body, and the air inlet pipe is connected to the protective gas supply pump in the air supply assembly, and a vertically arranged air outlet pipe is provided at the lower end of the vacuum generator body, and the air outlet pipe is connected to the inside of the diversion chamber, a chamber connected between the air inlet pipe and the air outlet pipe is provided in the vacuum generator body, and a nozzle fixedly connected to the air inlet pipe is installed in the chamber, and the nozzle of the nozzle points to the air outlet pipe, the second connecting pipes on the multiple tank bodies are commonly connected to the first manifold, and the first manifold is connected to the inner end wall of the chamber, and the third connecting pipes on the multiple tank bodies are commonly connected to the second manifold, and the second manifold is connected to the inner end wall of the chamber.

[0014] Preferably, a mixing chamber connected to the middle position of the air outlet pipe is provided inside the vacuum generator body, and a guide plate is fixedly installed in the mixing chamber, and the guide plate is arranged to be a spiral structure.

[0015] Preferably, first electric slide rails arranged longitudinally are fixedly installed on the left and right sides of the top of the machine platform, first round rods arranged transversely are fixedly connected to the moving ends of the two first electric slide rails, second electric slide rails arranged transversely are fixedly installed on the front and back sides of the top of the machine platform, second round rods arranged longitudinally are fixedly connected to the moving ends of the two second electric slide rails, the first round rod and the second round rod are not in the same plane, a bearing platform is arranged at the intersection of the first round rod and the second round rod, and the bearing platform is slidably sleeved on the first round rod and the second round rod respectively, an electric lifting platform is fixedly installed in the bearing platform, and a servo motor is fixedly installed on the top of the electric lifting platform, and the processing table is rotatably installed on the top of the servo motor and fixedly connected to the driving shaft of the servo motor.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by rotatably installing the turntable in the tank body, and evenly distributing a plurality of quantitative through holes of equal size in the turntable, with the negative pressure suction generated in the vacuum generator, when the quantitative through hole is connected between the first connecting pipe and the second connecting pipe, the metal powder can be firstly drawn into the quantitative through hole for quantitative storage, and then when the quantitative through hole is connected between the through hole and the third connecting pipe, the quantitative metal powder is quickly input into the powder spraying hole for spraying, and the quantitative temporary storage of the quantitative through hole and the uniform rotation of the quantitative through hole driven by the turntable can avoid the uneven feeding phenomenon of the metal powder under the long-distance transportation, which is beneficial to improve the precision and stability of the powder feeding of the device, and further beneficial to improve the effect of plasma powder surfacing processing; 2. In the present invention, a plurality of powder spray holes are evenly distributed around the central axis of the plasma generator, and a rotatable turbine is installed in a diversion chamber commonly connected to the plurality of powder spray holes. The metal powder is evenly dispersed when the turbine rotates, so that the metal powder can be sprayed on the surfacing work area in an all-round and even manner. At the same time, the lower end of the powder spray hole is tilted toward the central axis of the plasma generator, and the concave cavity is set as an inverted conical structure, so that the airflow and the metal powder can be more gathered after being sprayed downward, and act on the surfacing area in a concentrated manner, which is conducive to further improving the effect of the plasma powder surfacing process; 3. In the present invention, by setting the lower end of the annular spray chamber as a cylindrical structure with equal upper and lower parts, the protective gas can be directly covered outside the surfacing operation area when it is sprayed downward through the annular spray chamber, forming a cylindrical airflow protection. At the same time, by vertically fixing a plurality of surrounding partition plates in the annular spray chamber, the protective gas sprayed outward can be evenly diverted in the annular spray chamber, avoiding the cylindrical airflow layer formed due to uneven dispersion of the protective gas. Weak protection in the local direction improves the stability of the device during operation to a certain extent. 4. In the present invention, by providing a plurality of tank bodies and respectively being equipped with corresponding powder tanks, under the negative pressure suction in the vacuum generator, the device can feed a single metal powder, and can also feed a plurality of metal powders together as required, and accurately and automatically complete the mixing ratio of the plurality of metal powders during the powder feeding process, which improves the convenience of use of the device to a certain extent, helps to reduce the labor burden of the staff, and helps to improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. 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. In the drawings: Figure 1 A perspective view of the present invention; Figure 2 It is a stereoscopic view of the plasma surfacing welding machine body of the present invention from the left side perspective; Figure 3 It is a stereoscopic view of the plasma surfacing welding machine body of the present invention from the right side perspective; Figure 4 It is a front cross-sectional view of the plasma surfacing welding machine body of the present invention; Figure 5 It is a right side cross-sectional view of the plasma cladding welding machine body of the present invention; Figure 6 The figure is a disassembled diagram of the tank body, the rotating disk and the micro transmission of the present invention; Figure 7 It is a front view of a plurality of tanks of the present invention; Figure 8 It is a left side view of a plurality of tanks of the present invention; Fig. 9 It is a three-dimensional image of multiple tanks of the present invention from the back side perspective; Fig.10 It is a stereoscopic view of the cladding head of the present invention from the bottom perspective; Fig.11 It is a three-dimensional diagram of the first round rod, the second round rod and the supporting platform of the present invention.

[0018] Serial number in the picture: 1. Machine platform; 101. Air supply assembly; 102. Powder tank; 103. Processing table; 104. Support arm; 2. plasma cladding machine body; 201. cladding head; 202. plasma generator; 203. concave cavity; 204. powder spraying hole; 205. diverter cavity; 206. turbine; 207. annular spray cavity; 208. partition plate; 3. Cavity; 301. Tank; 302. Rotating plate; 303. Dosing hole; 304. First connecting pipe; 305. Second connecting pipe; 306. Through hole; 307. Third connecting pipe; 308. Micro transmission; 309. Constant speed motor; 310. Transmission shaft; 4. Vacuum generator body; 401. Air inlet pipe; 402. Air outlet pipe; 403. Chamber; 404. Nozzle; 405. First manifold; 406. Second manifold; 407. Mixing chamber; 408. Guide plate; 5. First electric slide rail; 501. First round rod; 502. Second electric slide rail; 503. Second round rod; 504. Loading platform; 505. Servo motor. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Embodiment: This embodiment provides a plasma powder cladding machine, see Figure 1 - Fig.11Specifically, the machine 1 includes a gas supply assembly 101 installed on the back of the machine 1, a powder tank 102 installed on the outer end wall of the machine 1, a processing table 103 installed on the top of the machine 1, a vertically arranged support arm 104 fixedly installed at the rear edge of the top of the machine 1, and a plasma cladding body 2 fixedly installed on the front of the support arm 104, a cladding head 201 fixedly installed at the lower end of the plasma cladding body 2, and a plasma generator 202 installed in the cladding head 201, and a bottom of the cladding head 201 is provided with a bottom of the plasma generator 202. The concave cavity 203 connected to the end thereof, and a powder spraying hole 204 is provided in the concave cavity 203, an annular spray cavity 207 surrounding the outside of the concave cavity 203 is provided at the bottom of the surfacing head 201, and the annular spray cavity 207 is connected to the protective gas supply pump in the gas supply component 101, a cavity 3 connected to the top of the plasma generator 202 is provided in the plasma surfacing body 2, and the top of the cavity 3 is connected to the plasma gas supply pump in the gas supply component 101, a tank body 301 is fixedly installed in the cavity 3, and a turntable 302 is rotatably installed in the tank body 301, and the turntable 302 is rotatably installed in the turntable 301. 02 is surrounded by many evenly distributed quantitative through holes 303, a first pipe 304 connected to the top of one quantitative through hole 303 is fixedly installed on the left side of the top of the tank body 301, and the first pipe 304 is connected to the bottom of the powder tank 102, a second pipe 305 corresponding to the first pipe 304 is fixedly installed on the left side of the bottom of the tank body 301, and a filter is installed at the connection between the second pipe 305 and the tank body 301, a through hole 306 connected to the top of another quantitative through hole 303 is opened on the right side of the top of the tank body 301, and the through hole 306 is connected to the top of the other quantitative through hole 303. A filter screen is also installed in the hole 306. A third connecting pipe 307 corresponding to the through hole 306 is fixedly installed on the right side of the bottom of the tank body 301. A uniform speed motor 309 for driving the turntable 302 to rotate is fixedly installed in the cavity 3. A vacuum generator is installed on the outer end wall of the plasma surfacing body 2. The protective gas supply pump in the gas supply assembly 101 is connected to the air inlet direction of the vacuum generator. The second connecting pipe 305 and the third connecting pipe 307 are both connected to the negative pressure suction direction of the vacuum generator, and the air outlet direction of the vacuum generator is connected to the powder spraying hole 204.

[0021] When the device is used, the staff uses the device to complete the powder cladding processing of metal parts. Two gas tanks are arranged in the gas supply component 101, which are used to store plasma gas and shielding gas respectively, and are connected to the plasma gas supply pump and the shielding gas supply pump respectively. After activation, the staff fixes the workpiece to be processed on the processing table 103, and the plasma gas supply pump of the gas supply component 101 is started to continuously transport the plasma gas into the cavity 3, and then spray it downward through the plasma generator 202. The plasma gas can be helium. The plasma gas is acted upon by the plasma generator 202 to generate a plasma arc, and a high-energy thermal environment is created on the surface of the workpiece. The shielding gas supply pump in the gas supply component 101 is started to supply the plasma gas to the vacuum generator. A high-speed airflow is provided, and the high-speed airflow passes through the vacuum generator. With the help of the Bernoulli effect, negative pressure suction can be formed in the vacuum generator, and the negative pressure suction is applied to the second connecting pipe 305. When the quantitative through hole 303 in the turntable 302 is connected to the first connecting pipe 304 and the second connecting pipe 305, the metal powder stored in the powder tank 102 will enter the quantitative through hole 303 through the first connecting pipe 304, and temporarily store in the quantitative through hole 303 under the obstruction of the filter screen at the connection position of the tank body 301 and the second connecting pipe 305. Then, the uniform speed motor 309 is powered on and started to drive the turntable 302 to rotate continuously in the tank body 301, and circulate the positions of the numerous quantitative through holes 303 opened on the turntable 302.

[0022] When the quantitative through hole 303 is connected between the through hole 306 and the third connecting pipe 307 due to the rotation of the position, the metal powder stored in the quantitative through hole 303 enters the vacuum generator through the third connecting pipe 307 under the negative pressure suction action in the vacuum generator, and then is synchronously ejected along with the flow of the protective gas in the vacuum generator, and finally ejected through the powder injection hole 204 and adheres to the surface of the workpiece. In the process of spraying the metal powder on the workpiece surface, the metal powder and the workpiece surface are melted together by the high temperature generated by the plasma arc. Synchronously, through the connection of the pipeline, the protective gas supply pump provides high-speed flowing protective gas into the annular spray chamber 207, and the protective gas can be argon. The protective gas is ejected downward through the annular spray chamber 207 and wrapped around the outside of the working area to form a protection. After the melted metal powder and the workpiece surface are mixed and solidified, the surfacing operation is completed.

[0023] When the device is used to perform plasma surfacing on the surface of a workpiece, under the action of the vacuum generator, the metal powder stored in the powder tank 102 first enters the quantitative through hole 303 for quantitative measurement, and then is driven by the turntable 302 to rotate and transpose the quantitative through hole 303, and the negative pressure suction provided by the vacuum generator is used to transport the metal powder to the powder injection hole 204 for spraying. Since the internal capacity of many quantitative through holes 303 is consistent and the rotation speed of the turntable 302 is uniform and controllable, the staff can control the rotation speed of the turntable 302 in the tank body 301 to achieve the purpose of controlling the precise quantitative transportation of the metal powder to the powder injection hole 204, which is conducive to ensuring the control accuracy of the metal powder supply amount. Compared with the method of directly feeding and conveying metal powder by airflow in the prior art, the feeding accuracy of metal powder when it is sprayed on the surface of the workpiece for plasma surfacing can be effectively improved, which is conducive to ensuring the stability of plasma powder surfacing and improving the surfacing effect.

[0024] During the quantitative delivery of metal powder, since the tank body 301 is installed in the cavity 3, the through hole 306 opened on the tank body 301 is connected to the inside of the cavity 3. This makes it possible for a portion of the plasma gas in the cavity 3 to follow the metal powder into the vacuum generator under negative pressure suction as the metal powder moves. The helium as the plasma gas and the argon as the protective gas are evenly mixed in the vacuum generator, and then ejected downward through the powder injection hole 204 to act on the plasma surfacing operation area. During the powder supply process, helium and argon are mixed to form a mixed gas, which combines the stability of argon and the high energy characteristics of helium, and can be used for surfacing processing of metals with extremely high welding requirements, such as nickel-based alloys, titanium alloys, etc., to facilitate improving the surfacing speed and quality.

[0025] In the specific implementation process, Figure 4 and Figure 5As shown, the concave cavity 203 is set to an inverted conical structure, the bottom end of the plasma generator 202 is connected to the top axial position of the concave cavity 203, a plurality of powder injection holes 204 are provided, and the plurality of powder injection holes 204 are evenly distributed around the bottom end of the plasma generator 202, and the lower ends of the plurality of powder injection holes 204 are inclined to the central axis of the plasma generator 202, and a diversion cavity 205 connected to the plurality of powder injection holes 204 is provided around the surfacing head 201, and the diversion cavity 205 is connected to the gas outlet direction of the vacuum generator, and a turbine 206 is rotatably installed in the diversion cavity 205. When the device is used, metal powder passes through a plurality of powder injection holes 204. The holes 204 are sprayed downward together to supply powder to the working area. Since many powder spray holes 204 are evenly arranged around the bottom end of the plasma generator 202, and the lower ends of many surfacing heads 201 are inclined toward the central axis of the plasma generator 202, when metal powder is supplied, powder supply operations can be performed from all sides, which is beneficial to improving the overall uniformity of metal powder supply. By setting the concave cavity 203 as an inverted conical structure, the airflow and powder sprayed downward in the concave cavity 203 can be gathered, which is convenient for ensuring that the surfacing operation area is more concentrated, which is beneficial to improving the effect of plasma powder surfacing processing.

[0026] Before the metal powder is sprayed downward through the numerous powder spray holes 204, it will first enter the diverter chamber 205 connected to the vacuum generator, and then be dispersed into the surrounding powder spray holes 204 for spraying. By rotatably installing the turbine 206 in the diverter chamber 205, the turbine 206 can rotate in the diverter chamber 205 under the push of the airflow. With the help of the stirring caused by the rotation of the turbine 206, the metal powder entering the diverter chamber 205 can be evenly dispersed into the various powder spray holes 204 for spraying, which is beneficial to improving the stability of the device in supplying metal powder through the multiple surrounding powder spray holes 204.

[0027] In the specific implementation process, Figure 4 , Figure 5 and Fig.10 As shown, the lower end of the annular spray chamber 207 is set as a cylindrical structure with equal upper and lower inner diameters and equal upper and lower outer diameters, and a plurality of surrounding partition plates 208 are fixedly installed at the lower part of the annular spray chamber 207. When the device is in use, by setting the lower end of the annular spray chamber 207 as a cylindrical structure with equal upper and lower diameters, the shielding gas can be directly covered outside the surfacing operation area when it is sprayed downward through the annular spray chamber 207, forming a cylindrical airflow protection, and by vertically fixing a plurality of surrounding partition plates 208 in the annular spray chamber 207, the shielding gas sprayed outward can be evenly diverted in the annular spray chamber 207, avoiding uneven dispersion of the shielding gas, resulting in weak protection in local directions of the formed cylindrical airflow layer, and to a certain extent improving the stability of the device during operation.

[0028] In the specific implementation process, Figure 4 - Fig. 9 As shown, there are a plurality of tank bodies 301, which are evenly distributed in the cavity 3 from top to bottom. There are also a plurality of powder tanks 102, and the number of powder tanks 102 is the same as the number of tank bodies 301. A first connecting pipe 304 fixed on a tank body 301 is fixedly connected to the bottom of a powder tank 102. A micro transmission 308 is fixedly installed at the bottom of each tank body 301, and the output shaft of the micro transmission 308 is connected to the turntable 302 in the corresponding tank body 301. A vertically arranged transmission shaft 310 is rotatably installed in the cavity 3, and the transmission shaft 310 is connected to the driving shaft of the uniform speed motor 309, and the input shaft of the micro transmission 308 is connected to the transmission shaft 310.

[0029] When the device is in use, a plurality of tank bodies 301 are arranged from top to bottom in the cavity 3, and each tank body 301 corresponds to a powder tank 102, which makes the device suitable for loading a variety of different metal powders for plasma cladding processing at the same time. When starting, the uniform speed motor 309 is powered on and started, driving the transmission shaft 310 to rotate, and transmitting the uniform rotational power to the input shafts of many micro transmissions 308, and then according to the needs, the micro transmission 308 is started and stopped and the speed is controlled, which can control the rotation and start and stop of the corresponding turntable 302. During the plasma cladding processing, the staff can control the metal powder in the corresponding powder tank 102 to perform independent powder feeding operations according to the operation requirements. The staff can also control the turntables 302 in the multiple tanks 301 to start at the same time, and perform feeding operations on multiple metal powders at the same time. The multiple metal powders will eventually enter the vacuum generator together, be mixed evenly with the airflow in the vacuum generator, and then be stably sprayed out through the powder spraying hole 204. When multiple metal powders are mixed for plasma surfacing processing, the staff does not need to mix the multiple metal powders in advance. The device can automatically realize the mixing operation of multiple powders after the metal powders are quantitatively transported and before the powders are sprayed out. The operation is flexible and convenient, which improves the convenience of use of the device to a certain extent, is conducive to reducing the labor burden of the staff, and is conducive to improving work efficiency.

[0030] The first connecting pipes 304 and the second connecting pipes 305 on the adjacent surfaces of the two upper and lower adjacent tank bodies 301 are staggered front and back, so that the first connecting pipes 304 and the second connecting pipes 305 connected on the adjacent surfaces of the two upper and lower adjacent tank bodies 301 will not interfere with each other, and the installation distance between the two adjacent tank bodies 301 can be further reduced, which is beneficial to reducing the space occupied when many tank bodies 301 are stacked from top to bottom, so as to ensure the rationality of the spatial arrangement of the device.

[0031] In the specific implementation process, Figure 2 - Figure 4As shown, the vacuum generator includes a vacuum generator body 4 fixedly mounted on the outer end wall of the plasma cladding body 2, and a vertically arranged air inlet pipe 401 is provided at the upper end of the vacuum generator body 4, and the air inlet pipe 401 is connected to the protective gas supply pump in the air supply assembly 101, and a vertically arranged air outlet pipe 402 is provided at the lower end of the vacuum generator body 4, and the air outlet pipe 402 is communicated with the inside of the diversion cavity 205, and a chamber 403 connected between the air inlet pipe 401 and the air outlet pipe 402 is provided in the vacuum generator body 4, and a spray nozzle fixedly connected to the air inlet pipe 401 is installed in the chamber 403. The nozzle 404 is provided with a nozzle 404, the nozzle outlet of the nozzle 404 points to the air outlet pipe 402, the second connecting pipes 305 on the multiple tank bodies 301 are commonly connected to the first manifold 405, and the first manifold 405 is communicated with the inner end wall of the chamber 403, the third connecting pipes 307 on the multiple tank bodies 301 are commonly connected to the second manifold 406, and the second manifold 406 is communicated with the inner end wall of the chamber 403, and a mixing chamber 407 connected to the middle position of the air outlet pipe 402 is provided inside the vacuum generator body 4, and a guide plate 408 is fixedly installed in the mixing chamber 407, and the guide plate 408 is set as a spiral structure.

[0032] When the device is used, the airflow provided by the protective air supply pump in the air supply component 101 enters through the air inlet pipe 401, and then is sprayed into the air outlet pipe 402 at a high speed through the nozzle 404. During the high-speed flow of the airflow, a low-pressure area is formed in the chamber 403 with the help of the Bernoulli effect, thereby generating negative pressure suction to the outside. Under the action of the negative pressure suction, negative pressure suction is generated in the second connecting pipe 305 through the connection of the first manifold 405, so that the quantitative through hole 303 is connected between the first connecting pipe 304 and the second connecting pipe 305. When the metal powder stored in the powder tank 102 can enter the quantitative through hole 303 for quantitative temporary storage under the action of negative pressure suction, similarly, the low-pressure area in the chamber 403 is formed. By means of negative pressure suction, when the quantitative through hole 303 is connected between the through hole 306 and the third connecting pipe 307, the metal powders quantitatively stored in the quantitative through holes 303 in the plurality of tank bodies 301 can enter the chamber 403 together through the connection of the plurality of third connecting pipes 307 and the second manifold 406, flow with the air flow, and finally be sent out through the air outlet pipe 402. When the various metal powders flow together in the air outlet pipe 402 under the entrainment of the air flow, they will pass through the mixing chamber 407 opened in the air outlet pipe 402, and form a spiral flow through the guidance of the guide plate 408 with a spiral structure. During the spiral flow, they are evenly mixed to ensure the uniformity of the various metal powders when mixed for use.

[0033] In the specific implementation process, Figure 1 and Fig.11As shown, longitudinally arranged first electric slide rails 5 are fixedly installed on the left and right sides of the top of the machine 1, and transversely arranged first round rods 501 are fixedly connected to the moving ends of the two first electric slide rails 5. Transversely arranged second electric slide rails 502 are fixedly installed on the front and back sides of the top of the machine 1, and longitudinally arranged second round rods 503 are fixedly connected to the moving ends of the two second electric slide rails 502. The first round rod 501 and the second round rod 503 are not in the same plane. A bearing platform 504 is arranged at the intersection of the first round rod 501 and the second round rod 503, and the bearing platform 504 is slidably sleeved on the first round rod 501 and the second round rod 503 respectively. An electric lifting platform is fixedly installed in the bearing platform 504, and a servo motor 505 is fixedly installed on the top of the electric lifting platform. The processing table 103 is rotatably installed on the top of the servo motor 505 and is fixedly connected to the driving shaft of the servo motor 505.

[0034] When the device is in use, the surfacing head 201 maintains a relatively stable state. During the process of plasma powder surfacing on the surface of the workpiece, the workpiece is fixedly mounted on the processing table 103. The staff can control the first round rod 501 to move forward and backward through the first electric slide rail 5, and can control the second round rod 503 to move left and right through the second electric slide rail 502. With the help of the sliding connection between the first round rod 501 and the second round rod 503 and the bearing platform 504, the movement adjustment of the bearing platform 504 can be realized. Synchronously, the staff can use the electric lifting platform installed on the bearing platform 504 to adjust the movement of the bearing platform 504. The rise and fall of the processing table 103 is controlled, and the rotation of the processing table 103 is controlled by the servo motor 505. Under relative movement, the front-back, left-right, up-and-down movement, and rotation adjustment of the workpiece clamped on the processing table 103 and the surfacing head 201 are finally realized. Compared with the prior art of controlling the movement of the surfacing head 201 to realize the surfacing processing, this operation mode keeps the position of the surfacing head 201 fixed and adjusts the position of the workpiece, which can avoid the problem of entanglement and blockage of the gas supply and powder supply pipeline during the movement of the surfacing head 201, thereby improving the stability of the plasma powder surfacing processing to a certain extent.

[0035] Specifically, the working principle and operation method of the present invention are as follows: The staff fixes the workpiece to be clad on the processing table 103, and then starts the device. The plasma gas supply pump in the gas supply component 101 fills plasma gas into the cavity 3, and the plasma is ejected downward through the plasma generator 202. In this process, a plasma arc is generated by the plasma generator 202 to form a high-temperature cladding area on the surface of the workpiece below. Synchronously, the shielding gas supply pump in the gas supply component 101 transports shielding gas to the annular spray chamber 207 and the air inlet pipe 401. The shielding gas is ejected downward through the annular spray chamber 207 to form a cylindrical airflow protection layer covering the outside of the cladding area. The uniform speed motor 30 9 is powered on to start, driving the transmission shaft 310 to rotate, providing uniform rotation power for the plurality of micro transmissions 308, and driving the corresponding turntable 302 to rotate in the tank body 301 through the transmission and control of the micro transmission 308, and controlling the speed and start and stop of the turntable 302 through the micro transmission 308. During the rotation process, the turntable 302 will be connected between the first connecting pipe 304 and the second connecting pipe 305, or between the through hole 306 and the third connecting pipe 307. Synchronously, when the protective gas enters the inlet pipe 401 and is sprayed toward the outlet pipe 402 at a high speed through the nozzle 404, a low-pressure area is formed at the chamber 403, which is applied to the first conduit. Negative pressure suction is generated in the first conduit 405 and the second conduit 305. Due to the connection between the first conduit 405 and the second conduit 305, when the quantitative through hole 303 is connected between the first conduit 304 and the second conduit 305, the metal powder in the powder tank 102 quantitatively enters the quantitative through hole 303. Then, when the quantitative through hole 303 is rotated and connected between the through hole 306 and the third conduit 307, the negative pressure suction when the third conduit 307 and the second conduit 406 are connected makes the metal powder quantitatively stored in the quantitative through hole 303 enter the chamber 403, and follow the air flow through the outlet pipe 402 into the diversion cavity 205. When the metal powder passes through the mixing chamber 407, it will be guided by the guide plate 408 to form a spiral flow for uniform mixing. The turbine 206 rotatably installed in the diverter chamber 205 rotates under the impetus of the airflow, so that the metal powder entering the diverter chamber 205 is evenly sprayed downward through the numerous surrounding powder injection holes 204, covering the high-temperature surfacing area on the surface of the workpiece. The metal powder and the workpiece surface are melted and mixed by the high temperature. Synchronously, the position of the workpiece on the processing table 103 is controlled by the first electric slide rail 5, the second electric slide rail 502, the electric lifting platform and the servo motor 505, and the surfacing area is continuously changed to continue the surfacing process.

[0036] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plasma powder cladding machine, comprising a machine platform (1), a support arm (104) being fixedly mounted on the top of the machine platform (1), a plasma cladding machine body (2) being fixedly mounted on the front of the support arm (104), a cladding head (201) being fixedly mounted on the lower end of the plasma cladding machine body (2), and a plasma generator (202) being mounted in the cladding head (201), characterized in that: The bottom of the cladding head (201) is provided with a cavity (203), and a powder spraying hole (204) is provided in the cavity (203); a cavity (3) connected to the top of the plasma generator (202) is provided in the plasma cladding machine body (2); a tank body (301) is fixedly installed in the cavity (3), and a turntable (302) is rotatably installed in the tank body (301); a plurality of evenly distributed quantitative through holes (303) are provided around the turntable (302); a first connecting pipe (304) is fixedly installed on the left side of the top of the tank body (301), and the first connecting pipe (304) is fixedly installed on the left side of the top of the tank body (301); 04) is connected to the bottom of the powder tank (102), a second connecting pipe (305) is fixedly installed on the left side of the bottom of the tank body (301), and a filter is installed at the connection between the second connecting pipe (305) and the tank body (301), a through hole (306) is opened on the right side of the top of the tank body (301), and a filter is installed in the through hole (306), a third connecting pipe (307) is fixedly installed on the right side of the bottom of the tank body (301), a uniform speed motor (309) is fixedly installed in the cavity (3), and a vacuum generator is installed on the outer end wall of the plasma surfacing welding machine body (2).

2. The plasma powder cladding machine according to claim 1, characterized in that: The concave cavity (203) is configured as an inverted conical structure, the bottom end of the plasma generator (202) is connected to the top axial position of the concave cavity (203), a plurality of powder injection holes (204) are provided, the plurality of powder injection holes (204) are evenly distributed around the bottom end of the plasma generator (202), and the lower ends of the plurality of powder injection holes (204) are all arranged to be inclined toward the central axis of the plasma generator (202).

3. A plasma powder cladding machine according to claim 2, characterized in that: A flow diversion chamber (205) in communication with a plurality of powder spray holes (204) is provided in the surfacing head (201), and the flow diversion chamber (205) is in communication with the gas outlet direction of the vacuum generator. A turbine (206) is rotatably installed in the flow diversion chamber (205).

4. The plasma powder cladding machine according to claim 1, characterized in that: The bottom of the surfacing head (201) is provided with an annular spray chamber (207) arranged around the outside of the concave cavity (203); the lower end of the annular spray chamber (207) is arranged as a cylindrical structure with equal upper and lower inner diameters and equal upper and lower outer diameters; a plurality of surrounding partition plates (208) are fixedly installed at the lower part of the annular spray chamber (207).

5. The plasma powder cladding machine according to claim 3, characterized in that: An air supply assembly (101) is installed on the back of the machine (1), a powder tank (102) is installed on the outer end wall of the machine (1), and a processing table (103) is installed on the top of the machine (1). A plurality of tank bodies (301) are provided, and the plurality of tank bodies (301) are evenly distributed in the cavity (3) from top to bottom. A plurality of powder tanks (102) are also provided, and the number of the powder tanks (102) is the same as the number of the tank bodies (301). A first connecting pipe (304) fixed on one tank body (301) is fixedly connected to the bottom of one powder tank (102).

6. The plasma powder cladding machine according to claim 5, characterized in that: A micro transmission (308) is fixedly mounted on the bottom of each tank body (301), and the output shaft of the micro transmission (308) is connected to the turntable (302) in the corresponding tank body (301). A vertically arranged transmission shaft (310) is rotatably mounted in the cavity (3), and the transmission shaft (310) is connected to the drive shaft of the uniform speed motor (309). The input shaft of the micro transmission (308) is connected to the transmission shaft (310).

7. The plasma powder cladding machine according to claim 5, characterized in that: The first connecting pipes (304) and the second connecting pipes (305) on the adjacent surfaces of the two upper and lower adjacent tank bodies (301) are arranged in a staggered manner in front and back.

8. The plasma powder cladding machine according to claim 5, characterized in that: The vacuum generator comprises a vacuum generator body (4) fixedly mounted on the outer end wall of the plasma cladding machine body (2), and a vertically arranged air inlet pipe (401) is provided at the upper end of the vacuum generator body (4), and the air inlet pipe (401) is connected to the protective air supply pump in the air supply assembly (101); a vertically arranged air outlet pipe (402) is provided at the lower end of the vacuum generator body (4), and the air outlet pipe (402) is communicated with the inside of the diversion chamber (205); and a gas outlet (402) is provided in the vacuum generator body (4) and connected between the air inlet pipe (401) and the air outlet pipe (402). A chamber (403) is formed between the tank bodies (301) and a nozzle (404) fixedly connected to the air inlet pipe (401) is installed in the chamber (403), the nozzle of the nozzle (404) points into the air outlet pipe (402), the second connecting pipes (305) on the plurality of tank bodies (301) are connected to the first manifold (405), and the first manifold (405) is connected to the inner end wall of the chamber (403), and the third connecting pipes (307) on the plurality of tank bodies (301) are connected to the second manifold (406), and the second manifold (406) is connected to the inner end wall of the chamber (403).

9. The plasma powder cladding machine according to claim 8, characterized in that: A mixing chamber (407) connected to the middle position of the air outlet pipe (402) is provided inside the vacuum generator body (4), and a guide plate (408) is fixedly installed inside the mixing chamber (407), wherein the guide plate (408) is arranged to be a spiral structure.

10. The plasma powder cladding machine according to claim 5, characterized in that: A longitudinally arranged first electric slide rail (5) is fixedly installed on the left and right sides of the top of the machine platform (1); a transversely arranged first round rod (501) is fixedly connected to the moving ends of the two first electric slide rails (5); a transversely arranged second electric slide rail (502) is fixedly installed on the front and rear sides of the top of the machine platform (1); a longitudinally arranged second round rod (503) is fixedly connected to the moving ends of the two second electric slide rails (502); the first round rod (501) and the second round rod (503) are not in the same plane; a bearing platform (504) is arranged at the intersection of the first round rod (501) and the second round rod (503); the bearing platform (504) is slidably sleeved on the first round rod (501) and the second round rod (503) respectively; an electric lifting platform is fixedly installed in the bearing platform (504); a servo motor (505) is fixedly installed on the top of the electric lifting platform; the processing table (103) is rotatably installed on the top of the servo motor (505) and is fixedly connected to the driving shaft of the servo motor (505).

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