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CN-121992392-A - Cold spraying system and control method

CN121992392ACN 121992392 ACN121992392 ACN 121992392ACN-121992392-A

Abstract

The invention relates to the technical field of cold spraying and discloses a cold spraying system and a control method, wherein the cold spraying system comprises a gas cylinder, an air flow adjusting device, a spray gun, a powder feeding device, a heating device, a water cooling device and a controller, an air pump and an air source are arranged in the gas cylinder, a first switch valve and a second switch valve are fixedly arranged in the air pump, the air flow adjusting device comprises a main air channel and a powder feeding air channel, two ends of the main air channel are respectively and fixedly connected with the inside of the air pump and the tail part of the spray gun, a main air proportional valve is fixedly arranged in the main air channel, and the input end of the main air proportional valve is electrically connected with the output end of the spray gun. The invention has the advantages that two different air sources can be selected for air supply by realizing the switching of the two different air sources, and the stability of spraying quality is realized by monitoring the air flow, the air temperature and the cooling water temperature, so that the failure rate is reduced, and the efficiency is improved.

Inventors

  • ZHANG ZHENGMAO
  • LI FAJIAN
  • ZHOU ZONGSHOU
  • LI WENYA

Assignees

  • 陕西斯赛姆科技有限公司

Dates

Publication Date
20260508
Application Date
20260407

Claims (7)

  1. 1. The cold spraying system comprises a gas cylinder (1), an air flow regulating device (2), a spray gun (3), a powder feeding device (4), a heating device (5) and a water cooling device (6) and a controller (7), and is characterized in that the air cylinder (1) is internally provided with an air pump and an air source, a first switch valve (1-1) and a second switch valve (1-2) are fixedly arranged in the air pump, the air flow regulating device (2) comprises a main air channel (2-1) and a powder feeding air channel (2-2), two ends of the main air channel (2-1) are respectively and fixedly connected to the inside of the air pump and the tail of the spray gun (3), a main air proportional valve (2-3) is fixedly arranged in the main air channel (2-1), the input end of the main air proportional valve (2-3) is electrically connected to the output end of the spray gun (3), the powder feeding device (4) comprises a powder feeder (4-1) and a powder feeding proportional valve (4-2), the powder feeding proportional valve (4-2) is fixedly arranged at the position of the powder feeder (4-1) and the powder feeder (4-1) is fixedly connected to the powder feeder (4-2) at the position of the powder feeder (1-2), the powder discharging pipeline (4-3) is fixedly connected to the inside of the spray gun (3), the heating device (5) comprises a heating power supply (5-1), a heater (5-2) and a heating circuit (5-3), the heating power supply (5-1) and the heater (5-2) are electrically connected in a bidirectional mode through the heating circuit (5-3), the water cooling device (6) comprises a water cooling machine (6-1) and a cooling waterway (6-2), and the water cooling machine (6-1) is fixedly connected with the spray gun (3) through the cooling waterway (6-2).
  2. 2. A cold spray system according to claim 1, wherein the output end of the controller (7) is electrically connected to the input end of the main air proportional valve (2-3), and a pressure control command is sent to the main air proportional valve (2-3) through the controller (7), so that the main air flow and the main air pressure of the spray gun (3) are monitored.
  3. 3. A cold spray system according to claim 1, wherein the output end of the controller (7) is electrically connected to the input end of the heating power supply (5-1), and a current control command is sent to the heating power supply (5-1) through the controller (7), so that the heater (5-2) is subjected to heater temperature detection and the gas temperature of the spray gun (3) is detected.
  4. 4. The cold spraying system of claim 1, wherein the output end of the controller (7) is electrically connected to the input end of the water cooler (6-1), and a water cooling control instruction is sent to the water cooler (6-1) through the controller (7), so that the water cooler (6-1) is subjected to water outlet temperature detection, backwater temperature detection and backwater flow monitoring.
  5. 5. The cold spraying system of claim 1, wherein the output end of the controller (7) is electrically connected to the input end of the powder feeding proportional valve (4-2), and a flow control instruction is sent to the powder feeding proportional valve (4-2) through the controller (7), so that powder feeding flow monitoring and powder feeding pressure monitoring are performed on the powder feeder (4-1).
  6. 6. A cold spray system according to claim 1, wherein the cooling water path (6-2) is a circulation line, and the cooling water circulates inside the water cooler (6-1) through the cooling water path (6-2).
  7. 7. A method of controlling a cold spray system, comprising: The method comprises the following operation steps: the powder feeding device comprises a main gas path (2-1) and a powder feeding gas path (2-2), wherein the main gas path (2-1) and the powder feeding gas path (2-2) are controlled to be opened and closed through a first switch valve (1-1) and a second switch valve (1-2), the main gas path (2-1) and the powder feeding gas path (2-2) are used for conveying two different gas sources, the main gas path (2-1) is communicated with the inside of a spray gun (3), the powder feeding gas path (2-2) is provided with particles through a powder feeder (4-1), the gas sources in the main gas path (2-1) are heated through a heater (5-2), and the gas sources in the main gas path (2-1) and the powder feeding gas path (2-2) are mixed in the inside of the spray gun (3) and are sprayed out through the spray gun (3); S2, the water cooler (6-1) refrigerates cooling water, the cooling water flows into the spray gun (3) through the cooling water channel (6-2) and flows back in the water cooler (6-1), so that the spray gun (3) is quickly cooled to achieve a refrigerating effect; S3, a controller (7) respectively sends control instructions to a main gas proportional valve (2-3), a heating power supply (5-1), a water cooler (6-1) and a powder feeding proportional valve (4-2), so that the main gas flow, the main gas pressure, the gas temperature, the outlet water temperature, the return water flow, the powder feeding flow and the powder feeding pressure are monitored; And S4, two ends of the cooling water channel (6-2) are respectively arranged at a water outlet and a water inlet of the water cooler (6-1), and when cooling water is cooled in the spray gun (3), the cooling water flows back to the water cooler (6-1) so that the cooling water can circulate in the water cooler (6-1).

Description

Cold spraying system and control method Technical Field The invention relates to the technical field of cold spraying, in particular to a cold spraying system and a control method. Background Cold spraying is a technology for realizing combination of a matrix and particles by utilizing preheated high-speed gas (nitrogen or helium) to accelerate and heat raw material powder and then impacting the matrix in a solid state mode; As a low-temperature processing technology, the cold spraying has small thermal influence on raw materials, and the formed coating has low porosity, high bonding strength and pressure stress state and has good mechanical, thermal, electrical and other properties; The cold spraying process adopts high-speed impact of particles so as to realize combination, the particle speed and the temperature can obviously influence the combination quality, and the improvement of the particle speed and the temperature stability and the stability of the cooling environment of the spray gun are important; Powder feeding air flow stability and accuracy, main air flow stability can directly influence the speed and temperature of particles, a temperature control method can influence the temperature of particles, and the stability of a cooling system can influence the temperature stability of particles. Disclosure of Invention The invention aims to provide a cold spraying system and a control method, which have the effects of improving the stability of gas flow, gas temperature and cooling temperature, thereby effectively improving the stability of spraying quality, reducing failure rate and improving efficiency. The technical aim of the invention is achieved through the following technical scheme that the cold spraying system comprises a gas cylinder, an air flow regulating device, a spray gun, a powder feeding device, a heating device, a water cooling device and a controller, wherein the gas cylinder is internally provided with a gas pump and a gas source, the gas pump is internally fixedly provided with a first switch valve and a second switch valve, the air flow regulating device comprises a main air passage and a powder feeding air passage, two ends of the main air passage are respectively and fixedly connected to the inside of the gas pump and the tail part of the spray gun, the main air passage is internally and fixedly provided with a main air proportional valve, the input end of the main air proportional valve is electrically connected to the output end of the spray gun, the powder feeding device comprises a powder feeder and a powder feeding proportional valve, the powder feeding proportional valve is fixedly arranged at the powder outlet of the powder feeder, the air flow regulating device is internally and fixedly connected to the powder feeding pipe, the powder outlet pipe is fixedly connected to the inside of the spray gun, the heating device comprises a heating power supply, a heater and a heating circuit, the heating power supply and the heater are electrically connected to the spray gun through the water cooling device, and the water cooling device comprises a bidirectional water cooling circuit. Through adopting above-mentioned technical scheme, through the gas supply input of switch valve one and switch valve two separation control main gas circuit and powder gas circuit, can select two kinds of different air supplies to supply air, the inside air supply of main gas circuit gets into the heater in the spray gun and heats, powder gas circuit is carried the particle after the powder feeder, get into the inside of spray gun and with main gas circuit confluence, then spout through the spray gun, the cooling water is sent into the inside of spray gun through the cooling water route and is cooled off, the controller passes through the electric current instruction, adjust the electric current output of heating power, realize controlling the heating power of heater, thereby control the inside gas temperature of spray gun, in order to accurately control particle temperature, heating device regards spray gun and main gas circuit as the temperature control target. The invention is further arranged that the output end of the controller is electrically connected with the input end of the main air proportional valve, and the controller is used for sending a pressure control instruction to the main air proportional valve, so that the main air flow and the main air pressure of the spray gun are monitored. By adopting the technical scheme, the main gas proportional valve adopts the controller to realize pressure control, the pressure detection point is positioned inside the spray gun, and the main gas proportional valve plays an abnormal monitoring role through main gas flow monitoring and main gas pressure monitoring when the gas circuit is blocked or the flow is abnormal. The invention is further arranged that the output end of the controller is electrically connected with the input end of the heating po