CN111958504A - Efficient thermal spraying process curved surface track cooperative, intelligent and environment-friendly automatic sand blasting device and method - Google Patents
Efficient thermal spraying process curved surface track cooperative, intelligent and environment-friendly automatic sand blasting device and method Download PDFInfo
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- CN111958504A CN111958504A CN202010800215.7A CN202010800215A CN111958504A CN 111958504 A CN111958504 A CN 111958504A CN 202010800215 A CN202010800215 A CN 202010800215A CN 111958504 A CN111958504 A CN 111958504A
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- sand blasting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
- B24C3/06—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
- B05B13/0431—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with spray heads moved by robots or articulated arms, e.g. for applying liquid or other fluent material to 3D-surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
- B24C5/04—Nozzles therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
- B24C9/006—Treatment of used abrasive material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Robotics (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses an efficient thermal spraying process curved surface track cooperative, intelligent and environment-friendly automatic sand blasting device and method. According to the invention, all procedures in the process of preparing the surface coating by the thermal spraying process are organically integrated, and the curved surface sand blasting, cleaning, roughness measurement, temperature monitoring and spraying can be completed at the same station. The sand blasting and spraying tracks are cooperated, only one program needs to be written, and after the program is written, the program does not need to enter the sand blasting and spraying environment midway. The whole coating preparation process can be efficiently and automatically completed through a programmable six-axis robot program, a large amount of time and material cost are saved in the whole process, and meanwhile, the safety and the body health of workers are guaranteed.
Description
Technical Field
The invention relates to the technical field of surface treatment and remanufactured coating, in particular to a high-efficiency, intelligent and environment-friendly synergistic process method and device for thermal spraying and sand blasting.
Background
The surface failure modes such as abrasion, corrosion, cavitation and the like seriously jeopardize the stable operation of industrial parts, the caused economic loss is more hundreds of millions, and particularly, the serious industrial engineering of the nations concerned with the livelihood, such as the energy development engineering of the three gorges hydro junction, the petroleum and the like, the ship engineering and the like can threaten the life and property safety of people and can cause serious environmental pollution. In order to ensure the smooth operation of engineering, the method for prolonging the service life of industrial parts and rapidly repairing the surface failure problem of parts by surface technology is a mainstream and very promising mode at present. The preparation of high-performance surface coatings by thermal spraying technology is a very important surface technology for solving the problem of surface failure of parts, and the industrial share accounts for about one third of the whole surface engineering.
Blasting and spraying are the most important processes in the overall thermal spray process, but blasting and spraying are currently typically performed separately. Firstly, a large amount of sand is accumulated in the sand blasting, for example, the sand and the spraying powder are mixed together with the spraying, and the accumulated sand cannot be used continuously, so that the cost is increased and the working efficiency is reduced; secondly, the side spraying equipment can be damaged by the sand splashed at a high speed during sand blasting, and meanwhile, the generated fine sand particles inevitably pollute the spraying equipment and even can enter the spraying equipment from the gap of the spraying equipment to cause the damage of the spraying equipment. Thirdly, dust caused by sand blasting secondarily pollutes the sand blasting surface and influences the quality of the sprayed coating. Therefore, in current engineering, the sand blasting and the spraying are mostly in different spaces, but the part stations are changed, the sand blasting and spraying track programs need to be programmed separately and need to be modified frequently, the time cost can be increased greatly, and the probability of accidents can be increased. In addition, the number of times that workers enter a dust room is increased, and even though protective measures are taken, the dust room inevitably has adverse effects on the health of the workers for a long time, and meanwhile, the working efficiency is also reduced.
A plurality of procedures of thermal spraying are realized through a new device to form a high-efficiency, intelligent, environment-friendly and safe method for thermally spraying curved surfaces, namely, parts are automatically subjected to procedures of sand blasting, surface cleaning, roughness measurement, spraying, cooling, roughness measurement and the like on a station through six robots in sequence, and the method is a vacancy of automatic integration of the existing thermal spraying process.
Disclosure of Invention
The invention aims to realize the functions of high efficiency, environmental protection, intelligence and integrity of the preparation of the thermal spraying coating on the curved surface of the part. The intelligent sand blasting and spraying system mainly achieves the functions of sand blasting and spraying track cooperation, controllable sand blasting and spraying distance, adjustable sand blasting pressure, real-time flexible sand blasting recovery, automatic screening and dust removal cyclic utilization system, intelligent roughness detection, surface cleaning by compressed air and the like.
The invention is realized by adopting the following technical scheme:
the utility model provides an automatic sand blasting unit of high-efficient hot spraying technology curved surface orbit is collaborative, intelligent, environmental protection, mainly includes: the system comprises a sand blasting head and thermal spraying gun fixed linkage module, a real-time sand blasting recycling module, a programmable six-axis manipulator, a surface roughness detection module, a surface temperature detection module and a computer intelligent control module;
the sand blasting head and thermal spraying gun fixing linkage module comprises an integrated fixing frame, three linear electric sliding rails, an electric lifting table and an electric rotary table; the electric turntable is connected with the programmable six-axis manipulator; the integrated fixing frame is connected with the electric turntable and can rotate along the axis of the integrated fixing frame; the integrated fixing frame is box-shaped, the electric lifting platform is arranged in the integrated fixing frame, a linear electric sliding rail is arranged on the electric lifting platform, a thermal spraying gun is arranged on the linear electric sliding rail, the thermal spraying gun can extend out of or retract into the integrated fixing frame according to use requirements, and 2-dimensional motion can be carried out through the electric lifting platform and the linear electric sliding rail, so that the position is adjusted to be cooperated with the walking track of the sand-blasting head; the other two linear electric sliding rails are arranged on the outer side surface of the integrated fixing frame, one linear electric sliding rail is provided with a sand blasting head, the other linear electric sliding rail is provided with a surface roughness detection module and a protective cover thereof, and the protective cover is used for preventing parts of the surface roughness detection module from being damaged during spraying and sand blasting;
the real-time sand blasting recycling module is used for performing sand blasting, sand sucking and dust removal on a part to be processed, and all power of the module is provided by dry compressed air;
the programmable six-axis manipulator is used for programming the spraying and sand blasting tracks of the complex curved surface;
the surface roughness detection module is used for measuring the roughness of the part to be processed after the sand blasting is finished;
the surface temperature detection module and the thermal spraying gun are fixed on the same linear electric slide rail and are used for monitoring the surface temperature of the part to be processed in the spraying process in real time;
the computer intelligent control module is used for controlling the process parameters and collecting the measurement data.
In the above technical solution, further, the integrated fixing frame is a hollow cuboid structure, two end faces are square, four side faces are rectangular, one of the side faces and one of the end faces are movable and can be opened and closed, and when the thermal spray gun is retracted inside the integrated fixing frame, the movable side face and the end face can be automatically closed under the action of elastic force; the electric lifting platform drives the thermal spraying gun to rise and then passes through the movable side face of the integrated fixing frame; simultaneously to different grade type and high thermal spraying rifle, for matching the sandblast height, the linear electric slide rail drives the terminal surface that can pass through the activity when thermal spraying rifle is close to the part. The thermal spraying gun is contracted inside the integrated fixing frame in the sand blasting process so as to prevent leaked sand dust from polluting spraying equipment and fully protect the spraying equipment; when thermal spraying is carried out, the thermal spraying gun is lifted to the same height with the sand blasting head through the electric lifting platform, moves through the linear electric sliding rail, and combines the sand blasting distance and the spraying distance to enable the action surfaces of sand blasting and spraying to be the same surface, so that the synergistic effect of the spraying track and the sand blasting track is achieved; during the hot spraying process, the sand blasting head can be retracted backwards through the linear electric sliding rail, so that the sand blasting head is prevented from being an obstacle when a hot spraying gun travels according to a track, and the spraying track stroke is prevented from being influenced.
Furthermore, the real-time sand blasting recycling module comprises a sand blasting head, a sand blasting head sand suction cover, a sand blasting head sealing brush, a sand output pipe, a sand recycling pipe, a sand blasting air inlet pipe, a sand screening net, a sand storage tank and a dust removal device;
the sand blasting head is of a three-hole sand blasting head structure, one hole is connected with a sand blasting air inlet pipe, the other hole is connected with a sand output pipe, and the other hole is an air outlet and sand outlet, namely a sand blasting nozzle; the other end of the sand output pipe is connected with the sand storage tank; the sand suction cover of the sand blasting head adopts a horn-shaped structure, a sand suction port is formed in the sand suction cover of the sand blasting head, the sand suction port is connected with a sand recovery pipe, and the other end of the sand recovery pipe is connected with a sand screening net; the sand-blasting nozzle of the sand-blasting head is hermetically connected with the sand-sucking cover of the sand-blasting head; the other end of the sand-blasting head sand-sucking cover is connected with the sand-blasting head sealing brush in a sealing manner, the sand-blasting head sealing brush adopts double-layer sealing, the inner layer adopts dense wire netting, the outer layer adopts rubber material with better elasticity, the inner layer can well relieve the impact force of sand scattering outwards and divide air flow, the outer layer adopts a rubber structure with better elasticity, fine sand dust and air flow can be well isolated, the sealing performance of the sand-blasting head sand-sucking cover and the curved surface of a part is improved, meanwhile, the suction force of a sand-sucking opening can be improved, and the inner layer and the outer layer of the sand-blasting head sealing brush are flexible, so that sand blasting of complex curved surfaces can be coped with, and good sealing performance is kept; meanwhile, rubber sealing rings are adopted between the sand-blasting head sand-sucking cover and the sand-blasting head, and between the sand-blasting head sand-sucking cover and the sand-blasting head sealing brush, so that the sealing performance of the device is ensured; the sand screening net is made of a stainless steel net and is arranged in the sand storage tank, and the mesh number of the sand screening net can be set according to a specific sand blasting process; the sand storage tank is also provided with a sand discharge port, and when the sand amount is enough, the sand discharge port can be opened to recover the sand; waste sand and dust in the sand storage tank enter a dust removal device through a pipeline for dust removal, filter cotton is arranged in the dust removal device, a dust removal air leakage port and a waste sand collection port are formed in the dust removal device, waste fine sand and air can be separated when the waste sand and dust pass through the filter cotton, the air enters the atmosphere through the dust removal air leakage port, the waste fine sand can be deposited at the waste sand collection port under the action of gravity, and when the waste fine sand is accumulated to a certain degree, the waste sand collection port can be opened to clean the waste fine sand;
the compressed air is connected with the sand blasting air inlet pipe, the sand storage tank air inlet pipe and the dust removal device air inlet pipe through the gas four-way joint, and each air inlet pipe is provided with an air regulating valve for regulating the air outlet quantity of the compressed air so as to regulate the sand blasting pressure, the sand suction pressure and the dust removal power; and the sand output pipe is also provided with an air regulating valve for regulating the sand output.
Further, the programmable six-axis manipulator can adopt a six-joint robot commonly available in the market.
Further, the surface roughness detection module comprises a spring telescopic rod, a pressure sensor, a roughness meter, an electric linear slide rail and a spring telescopic rod adaptor; the spring telescopic rod adaptor is fixed on the electric linear slide rail; one end of the spring telescopic rod is fixed on the spring telescopic rod adaptor, the other end of the spring telescopic rod is connected with a roughness meter, and the roughness meter and the spring telescopic rod can be connected by a movable hinge, so that the roughness meter can rotate on a plane to adapt to roughness measurement of curved surface parts; and a pressure sensor is also arranged in the spring telescopic rod and used for measuring the pressure of the surface of the roughness meter and the part to be measured.
Furthermore, the spring telescopic rod comprises a fixed end and a telescopic end, and the fixed end is connected with the telescopic end through a spring; the pressure sensor is arranged at the fixed end, the other end of the pressure sensor is connected with the spring, and the pressure between the roughness meter and the surface of the part can be measured in real time; the roughness meter is arranged at the telescopic end of the spring telescopic rod; the spring telescopic rod adaptor is provided with a groove, the fixed end of the spring telescopic rod is positioned in the groove, and the side surface freedom degree of the spring telescopic rod is limited by the spring telescopic rod adaptor in a tightening mode.
Furthermore, the surface temperature detection module comprises an infrared thermometer and a fixed connecting piece, the fixed connecting piece and the thermal spraying gun are fixed on the same linear electric sliding rail, and the infrared thermometer is fixed on the fixed connecting piece.
Furthermore, the computer intelligent control module comprises a process parameter control part and a measurement data collection part; the process parameter control part is used for controlling sand blasting process parameters and spraying process parameters, the sand blasting process parameters comprise sand blasting pressure, sand discharging amount and sand suction pressure, and the spraying process parameters comprise air, nitrogen, fuel, oxygen flow and pressure numerical values; the measurement data collection part is used for collecting the measurement data of the surface temperature and the roughness of the part after sand blasting or spraying.
The invention also provides a collaborative, intelligent and environment-friendly automatic sand blasting method for the curved surface track of the high-efficiency thermal spraying process, which is realized based on the device and specifically comprises the following steps:
the method comprises the following steps: and fixing the part to be processed on a station, and cleaning oil stains on the surface of the part by using alcohol.
Step two: installing a thermal spraying gun and a sand blasting head of required models on a linear electric sliding rail, and enabling the distance between the axis of the thermal spraying gun barrel and the axis of the sand blasting head to be equal to the distance between the axis of an electric rotary table and the axis of the electric rotary table through an electric lifting table so as to ensure that the axis of the thermal spraying gun barrel and the axis of the sand blasting head are on the same line after the electric rotary table rotates 90 degrees or 180 degrees; adjusting respective linear electric slide rails to ensure that the action surfaces of the thermal spraying gun and the sand blasting head are in the same plane, namely the distance from the mouth of the thermal spraying gun to the plane is the reasonable spraying distance of the thermal spraying gun, and the distance from the mouth of the sand blasting head to the plane is the reasonable sand blasting distance; the positions of the two linear electric sliding rails and the electric lifting platform are stored in a computer, and the thermal spraying gun is contracted inside the integrated fixing frame.
Step three: operating the programmable six-axis manipulator, programming a sand blasting track, enabling the flexible sand blasting head sealing brush to be always tightly attached to the surface of the part in the track stroke, and storing a plurality of roughness measurement positions of the part to be processed; compressed air is introduced, an air regulating valve C and an air regulating valve B of a sand blasting air inlet pipe are opened, an air regulating valve A of a sand output pipe and an air regulating valve D of a sand storage tank air inlet pipe are closed, the surface of a part to be processed is cleaned through the compressed air, and the programmed program is automatically run in a trial mode, so that no problem exists in the program; the air regulating valves of all pipelines adopt electromagnetic valves, and can be controlled manually or by a computer intelligent control module.
Step four: opening air regulating valves of a sand blasting air inlet pipe, a sand output pipe, a dust removal device air inlet pipe and a sand storage tank air inlet pipe, and adjusting the air flow pressure and the sand output of sand blasting technological parameters to be proper values; automatically operating a programmable six-axis manipulator program to perform sand blasting; and after the sand blasting is finished, closing each valve, and moving the programmable six-axis manipulator to the roughness measurement position stored in the third step.
Step five: moving the linear electric sliding rail provided with the roughness meter to enable the roughness meter and the surface of the part to be processed to be under a proper pressure, controlling the pressure through feedback of a pressure sensor and the linear electric sliding rail, and measuring the surface roughness of the part to be processed by using the roughness meter after adjusting the position; after the surface roughness measurement is finished, retracting the roughness meter into the protective cover; if the roughness does not meet the requirement, repeating the sand blasting procedure again, generally researching reasonable sand blasting process parameters according to different materials, wherein the sand blasting procedure only needs to be carried out once; the roughness meets the requirements, and the sand blasting head is contracted to the original safe position through the linear electric sliding rail, so that the next step is carried out.
Step six: moving the thermal spraying gun to the position stored in the second step through the electric lifting table and the linear electric sliding rail; the position of the thermal spraying gun replaces the position of the previous sand blasting head through the rotation of the electric turntable (the rotation angle of the electric turntable is determined according to the installation positions of the thermal spraying gun and the sand blasting head); igniting the thermal spraying gun, operating the program compiled in the step three, preheating and spraying. In the spraying process, the surface temperature of the part to be processed is monitored through an infrared thermometer all the time, and when the temperature is too high, an air regulating valve of a sand blasting head air inlet pipe is independently opened to carry out air cooling.
Step seven: and after the spraying is finished, waiting for the surface temperature of the machined part to be reduced to the room temperature, measuring the roughness of the coating, and recording.
In the invention, the air regulating valve A and the air regulating valve C are required to be opened simultaneously in the sand blasting process, the air regulating valve A is used for regulating the sand discharging amount, and the air regulating valve C is used for regulating the sand blasting pressure.
The sand sucking process is also a dust removing process, the air regulating valve B and the air regulating valve C need to be opened simultaneously, a smooth airflow passage is formed between a sand blasting air inlet pipe, a sand sucking port, a sand storage tank and a dust removing air leakage port (atmosphere), dust on the surface of a part and reusable sand pass through the sand sucking port and reach the sand storage tank, the dust and the reusable sand are separated under the action of a sand sieving net and the self gravity of the sand, the reusable sand is remained in the sand storage tank, the dust reaches the dust removing device, and the dust is filtered by filter cotton and discharged into the atmosphere through the dust removing air leakage port. The principle is as follows: the siphon effect generated by the high-speed airflow from the air regulating valve B to the dedusting air leakage opening at the sand suction opening and the combined action of the thrust generated by the compressed air from the air regulating valve C at the sand suction opening.
The sand (dust) suction process is as follows: the sand blasting nozzle sprays high-speed sand airflow to the surface of a part, the sand airflow is positioned in the center of the sand blasting head sand suction cover, the cross section of the sand airflow is much smaller than that of the sand blasting head sand suction cover, reflected sand and air flow can enter the sand suction port through the residual space outside the sand airflow under the action of the sand blasting head sand suction cover and the sand blasting head sealing brush due to the siphon effect of the sand suction port and the residual kinetic energy of the sand blasting head.
The sand blasting and the sand sucking are carried out simultaneously, an air regulating valve A, an air regulating valve B, an air regulating valve C and an air regulating valve D need to be opened simultaneously, the principle is that a siphon effect of a sand inlet generates a suction effect in a sand blasting sand inlet pipe and a thrust effect of internal pressure of a sand storage tank on sand, the air regulating valve A is used for regulating sand outlet amount, and the air regulating valve D is used for improving the mobility of the sand in the sand storage tank, providing certain pressure in the sand storage tank and providing certain thrust on sand outlet.
The invention has the beneficial effects that:
the device and the method effectively integrate all procedures of the process of preparing the surface coating by the thermal spraying process organically, and can finish the operations of sand blasting, cleaning, roughness measurement, temperature monitoring and spraying of the curved surface at the same station. The sand blasting and spraying tracks are cooperated, only one program needs to be written, and after the program is written, the program does not need to enter the sand blasting and spraying environment midway. And the real-time sand blasting recycling module only needs compressed air to provide power, and can simultaneously realize recycling of sand in the sand blasting process. The double-layer sand blasting head sealing brush further ensures the sealing property and sand suction capability of the device, can complete the work of air cooling, sand blasting and sand suction, and saves the whole process and protects the environment; but the grit is through automatic screening cyclic utilization, and a large amount of useless sand and dust can stay in dust collector simultaneously, can not get into in the outside atmosphere and go, the polluted environment, harm health. After the process parameters are determined, the whole coating preparation process can be efficiently and automatically completed through a programmable six-axis robot program, and the method comprises the following steps: automatic sandblast, cleanness, roughness measurement, hot spraying, temperature monitoring feedback, the whole in-process has practiced thrift a large amount of time and material cost, has guaranteed staff's safety and healthy simultaneously.
Drawings
FIG. 1 is a schematic diagram of an efficient thermal spraying process with cooperative curved surface trajectory, intelligent, environment-friendly automatic sand blasting device;
FIG. 2 is an enlarged schematic view of a fixed linkage module of the sand blasting head and the thermal spray gun;
FIG. 3A is a right side view, FIG. 3B is a front view, and FIG. 3C is a top view of the integrated fastening structure;
FIG. 4A is a right side view, 4B is a front view and 4C is a top view of the spring rod adaptor structure;
FIG. 5 is a schematic view of the inside of the spring rod and the pressure sensor;
FIG. 6A is a front view and FIG. 6B is a left side view of the configuration of the sand suction cap of the sand blast head;
wherein, 1-programmable six-axis manipulator, 2-turntable adapter, 3-electric turntable, 4-integrated fixed mount, 5-electric linear slide rail A, 6-electric linear slide rail B, 7-infrared thermometer, 8-thermal spray gun, 9-thermal spray gun connector, 10-spring telescopic rod adapter, 11-spring telescopic rod, 12-roughness meter, 13-roughness meter fixing clamp, 14-electric linear slide rail C, 15-sand blasting head adapter, 16-sand blasting head sealing brush, 17-sand blasting head sand suction cover, 18-sand blasting head, 19-sand blasting air inlet pipe, 20-sand output pipe, 21-sand recovery pipe, 22-sand screening net, 23-sand storage tank, 24-sand unloading port, 25-dust removal air release port, 26-air regulating valves A, 27-dust removing device, 28-air four-way, 29-air regulating valves B, 30-air regulating valves C, 31-integrated control computer, 32-spraying gun control cabinet, 33-part to be processed, 34-electric lifting platform, 35-pressure sensor, 36-protective cover, 37-air regulating valve D
Detailed Description
In order to explain the present invention in more detail, the following description is given in conjunction with specific examples.
Fig. 1 shows that the invention relates to an efficient thermal spraying process curved surface track cooperative, intelligent and environment-friendly automatic sand blasting device, which comprises: the device comprises a sand blasting head and thermal spraying gun fixed linkage module, a real-time sand blasting recycling module, a programmable six-axis manipulator, a surface roughness detection module, a surface temperature detection module and a computer intelligent control module.
As shown in fig. 2, the sand blasting head and thermal spray gun fixing linkage module comprises an integrated fixing frame 4, three linear electric sliding rails, an electric lifting table 34 and an electric rotary table 3; the electric rotary table 3 is connected with the programmable six-axis manipulator 1, the rotary table adapter 2 is fastened on the programmable six-axis manipulator 1 through bolts, and the electric rotary table 3 is fixed on the rotary table adapter 2 through bolts; the integrated fixing frame 4 is connected with the electric rotary table 3, one fixed end face of the integrated fixing frame 4 is fastened with the electric rotary table 3 through bolts, and meanwhile, the center of the square end face and the rotation center of the electric rotary table 3 are kept on the same straight line, so that the integrated fixing frame 4 can rotate along the axis of the integrated fixing frame; the integrated fixing frame 4 is box-shaped, the electric lifting platform 34 is fastened inside the integrated fixing frame 4 through bolts, the linear electric sliding rail A5 is fixed on the electric lifting platform 34 through bolts, the thermal spraying gun connecting piece 9 is fixed on the linear electric sliding rail A5, the thermal spraying gun 8 is fixed on the linear electric sliding rail A5 through the thermal spraying gun connecting piece 9, and the thermal spraying gun 8 can extend out of or retract into the integrated fixing frame 4 according to use requirements; the other two linear electric sliding rails are arranged on the outer side surface of the integrated fixed frame 4, a sand blasting head is arranged on the linear electric sliding rail C14, and a surface roughness detection module and a protective cover 36 thereof are arranged on the other linear electric sliding rail B6;
the real-time sand blasting recycling module is used for performing sand blasting, sand sucking and dust removal on the part 33 to be processed, and all power of the module is provided by dry compressed air;
the programmable six-axis manipulator 1 is used for programming the spraying and sand blasting tracks of the complex curved surface;
the surface roughness detection module is used for measuring the roughness of the part 33 to be processed after the sand blasting is finished;
the surface temperature detection module and the thermal spraying gun 8 are fixed on the same linear electric slide rail A5 and used for monitoring the surface temperature of the part 33 to be processed in the spraying process in real time;
the computer intelligent control module is used for controlling the process parameters and collecting the measurement data.
As shown in fig. 3A-C, the integrated fixing frame 4 is a hollow cuboid structure, two end faces are square, four side faces are rectangular, one of the side faces and one of the end faces are movable and can be opened and closed, the thermal spraying gun 8 is retracted into the integrated fixing frame 4 in the sand blasting process, and the movable side face and the end face can be automatically closed under the action of elastic force, so that the leaked sand dust can not pollute the spraying equipment, and the spraying equipment can be fully protected; when the electric lifting platform 34 is lifted, the electric lifting platform passes through the movable side face of the integrated fixed frame 4, and when the linear electric sliding rail A5 approaches to a part, the electric lifting platform passes through the movable end face; when carrying out hot spraying, hot spraying rifle 8 rises through electric lift platform 34 and plays and sandblast head 18 same height, removes through linear electric slide rail A5 to combine sandblast distance and spraying distance, make the effect face of sandblast and spraying be same face, thereby reach the synergism of spraying and sandblast orbit. In the thermal spraying process, the sand blasting head 18 can be retracted backwards by the linear electric slide rail C14, so that the sand blasting head 18 does not become an obstacle when the thermal spraying gun 8 travels along the trajectory, and the trajectory travel of the thermal spraying is not affected.
The real-time sand blasting recycling module comprises a sand blasting head 18, a sand blasting head sand suction cover 17, a sand blasting head sealing brush 16, a sand output pipe 20, a sand recycling pipe 21, a sand blasting air inlet pipe 19, a sand screening net 22, a sand storage tank 23 and a dust removal device 27; the electric linear slide rail C14 is flush with the side surface on which the electric lift table 34 is mounted. The sandblast head 18 is fixed on the sandblast head adapter 15 through a fastening nut, and the sandblast head adapter 15 is fixed on the sliding table of the electric linear sliding rail 14 through a bolt. The sand blasting head 18 is a three-hole sand blasting head structure (the structure of the sand blasting head is a common sand blasting nozzle based on siphon principle in the market), one hole is connected with a sand blasting air inlet pipe 19, the other hole is connected with a sand output pipe 20, and the other hole is an air outlet and sand outlet, namely a sand blasting nozzle; the other end of the sand output pipe 20 is connected with a sand storage tank 23; as shown in fig. 6A-B, the sand-blasting head sand-sucking cover 17 is in a horn-shaped structure, a sand-sucking port is formed on the sand-blasting head sand-sucking cover 17, the sand-sucking port is connected with a sand recovery pipe 21, and the other end of the sand recovery pipe 21 is connected with a sand sieving net 22; the sand-blasting nozzle of the sand-blasting head 18 is hermetically connected with the sand-sucking cover 17 of the sand-blasting head; the other end of the sand-blasting head sand-sucking cover 17 is in threaded connection with the sand-blasting head sealing brush 16 so as to be convenient to detach and replace, the sand-blasting head sealing brush 16 adopts double-layer sealing, the inner layer adopts dense wire netting for relieving impact force of scattering sand outwards and dividing air flow, the outer layer adopts rubber material with better elasticity for improving the sealing performance of the sand-blasting head sand-sucking cover and the curved surface of a part and improving the suction force of a sand-sucking opening; meanwhile, rubber sealing rings are adopted between the sand blasting head sand suction cover 17 and the sand blasting head 18, and between the sand blasting head sand suction cover 17 and the sand blasting head sealing brush 16 for sealing, so that the sealing performance of the device is ensured; the sand screening net 22 is made of a stainless steel net, is arranged in the sand storage tank 23 and is used for screening and recovering sand, a sand discharge port 24 is further arranged on the sand storage tank 23, and when the amount of the sand is enough, the sand discharge port 24 can be opened to recover the sand; the waste sand and dust in the sand storage tank 23 enter a dust removal device 27 through a pipeline for dust removal, filter cotton is arranged in the dust removal device 27, and a dust removal air leakage opening 25 and a waste sand collection opening are formed in the dust removal device 27; an air inlet inside the filter cotton of the dust removing device 27 is connected with a waste sand and dust outlet at the upper part of the sand storage tank 23 by a flexible pipe, and an air outlet outside the filter cotton of the dust removing device 27 is connected with a flexible pipe of the dust removing air leakage port 25; compressed air passes through gaseous cross 28 and sandblast intake pipe, sand storage tank intake pipe and dust collector intake-tube connection, is equipped with air control valve C30, air control valve D37, air control valve B29 respectively on each intake pipe way for adjust compressed air's air output, thereby adjust the size of sandblast pressure, the suction of inhaling the sand mouth and dust removal power. And an air regulating valve A26 is arranged on the sand output pipe and is used for regulating the sand output. The air regulating valve D37 of the air inlet pipe of the sand storage tank is used for increasing the fluidity of sand and the smoothness of sand discharging, and has the function of increasing the suction force of the sand suction port.
The surface roughness detection module comprises a spring telescopic rod 11, a pressure sensor 35, a roughness meter 12, an electric linear slide rail B6 and a spring telescopic rod adaptor 10; the electric linear slide rail B6 is fixed on the side surface of the integrated fixed frame 4 through bolts, and the side surface is vertical to the movable side surface; the spring telescopic rod adaptor 10 is fixed on the electric linear slide rail B6 through a bolt; one end of a spring telescopic rod 11 is fixed on the spring telescopic rod adaptor 10 through threads, the other end of the spring telescopic rod is connected with a coarseness meter fixing clamp 13 through a hinge, and a coarseness meter 12 is connected to the tail end of the spring telescopic rod 11 through the coarseness meter fixing clamp 13, so that the coarseness meter 12 can rotate under the action of force when contacting a curved surface so as to adapt to the measurement of a curved surface part; and a pressure sensor 35 is also arranged between the spring telescopic rod 11 and the spring telescopic rod adaptor 10 and is used for measuring the pressure of the surface of the roughness meter 12 and the part 33 to be processed. The protective cover 36 is fixed to the side of the integrated fixing frame 4 by bolts.
Fig. 4A-C are schematic structural views of a spring telescopic rod adaptor according to the present invention. The spring telescopic rod adaptor 10 is provided with a groove, the fixed end of the spring telescopic rod 11 is positioned in the groove, and the spring telescopic rod adaptor 10 can limit the lateral freedom degree of the spring telescopic rod 10 in a tightening mode.
Fig. 5 is a schematic diagram of the inside of the telescopic spring rod and the pressure sensor according to the present invention. The spring telescopic rod 11 comprises a fixed end and a telescopic end, and the fixed end is connected with the telescopic end through a spring; the pressure sensor is arranged at the fixed end, one end of the pressure sensor is connected with the spring, and the pressure of the roughness meter and the surface of the part can be measured in real time. The flexible end of the spring flexible rod 11 is connected with a roughness meter 12 through a movable hinge.
The surface temperature detection module comprises an infrared thermometer 7 and a fixed connecting piece, the fixed connecting piece and the thermal spraying gun 8 are both fixed on the linear electric sliding rail A5, and the infrared thermometer 7 is fixed on the fixed connecting piece through screws.
The computer intelligent control module comprises a process parameter control part and a measurement data collection part; the process parameter control part is used for controlling sand blasting process parameters and spraying process parameters, the sand blasting process parameters comprise sand blasting pressure, sand discharging amount and sand suction pressure, and the spraying process parameters comprise air, nitrogen, fuel, oxygen flow and pressure numerical values; the measurement data collection part is used for collecting the measurement data of the surface temperature and the roughness of the part after sand blasting or spraying. The specific method comprises the following steps: the integrated control computer 31 respectively controls the programmable six-axis manipulator 1 through control signals, the spraying gun control cabinet 32, the electric rotary table 3, the electric lifting table 34, the linear electric sliding rail A5, the linear electric sliding rail B6 and the linear electric sliding rail C14 to realize the synergy of sand blasting and spraying tracks, real-time temperature monitoring and automatic surface roughness measurement functions, the thermal spraying process parameters can be adjusted by controlling the spraying gun control cabinet 32, the sand blasting process parameters can be adjusted by controlling the air regulating valve A26, the air regulating valve B29 and the air regulating valve C30, and finally, the whole preparation work of the thermal spraying coating can be automatically completed through the integrated control computer 31.
The process method for preparing the coating by adopting the device can specifically comprise the following steps:
(1) the part 33 to be machined is fixed on a proper station, and alcohol is used for cleaning oil stains on the surface of the part.
(2) According to the material characteristics and the coating requirements of specific parts, a proper sand blasting head 18 and a proper thermal spraying gun 8 are selected and installed; for example, 0Cr13Ni5Mo stainless steel, which is commonly used as a material of a water turbine in the field of water conservancy and hydropower, is replaced by a sand nozzle with the diameter of 8mm and the length of 60mm, and the WC coating is prepared by using oxygen kerosene supersonic thermal spraying (HVOF) through a thermal spraying gun. The sand blasting head 18 is arranged on the sand blasting head adapter 15, and the electric linear slide rail C14 is controlled to move the sand blasting head 18 to a reasonable sand blasting position; install thermal spraying gun 8 on thermal spraying gun connecting piece 9, and remove thermal spraying gun 8 to the particular position through control electric lift platform 34 and electronic linear slide rail A5, make the axial lead of thermal spraying gun 8 equal to the distance of the 3 axial leads of electronic revolving stage with the axial lead of sand blasting head 18, guarantee the rotatory 180 degrees backs of electronic revolving stage 3, thermal spraying gun 8 axle center is on same line with sand blasting head 18 axle center, thermal spraying gun 8 is the coplanar with sand blasting head 18's active surface, the thermal spraying muzzle is the reasonable spraying distance of thermal spraying gun 8 to this planar distance promptly, the distance of sand blasting head mouth to this plane is reasonable sandblast distance. The position information of the electric lifting platform 34, the electric linear slide rail A5 and the electric linear slide rail C14 is stored in the integrated control computer 31.
(3) And controlling the programmable six-axis manipulator 1 to program the thermal spraying track, storing a plurality of pieces of surface roughness measurement position information, and automatically testing the running program after the programming is finished so as to ensure that the whole running track has no fault or collision.
(4) The positions of the electric lifting platform 34 and the electric linear sliding rail A5 are adjusted, so that the thermal spraying gun 8 is retracted inside the integrated fixing frame 4, all movable surfaces of the integrated fixing frame 4 are closed and fixed, and the electric rotary table 3 is rotated by 180 degrees.
(5) 30-46 mesh sand is filled in the sand storage tank 23, and the sand can be Al2O3Or SiC, compressed air is accessed, and the air regulating valve A26, the air regulating valve B29, the air regulating valve C30 and the air regulating valve D37 of the sand storage tank air inlet pipe are opened and adjusted, so that the sand blasting pressure is between 0.2MPa and 0.4MPa, and the sand output is in a reasonable range after a process test; and (4) running the program, carrying out a sand blasting procedure, closing the air regulating valve A26 and the air regulating valve D37 after the program is run, and running the program again to clean the sand and dust on the surface of the part.
(6) And closing the air regulating valve B29 and the air regulating valve C30, moving the programmable six-axis manipulator 1 to the stored roughness measuring point position, adjusting the position of the electric linear slide rail C6 to tightly press the roughness meter 12 on the surface of a part, paying attention to observing the pressure value fed back by the pressure sensor 35 on a computer, ensuring that the roughness meter 12 can be tightly attached to the surface to prevent sliding, ensuring that the pressure cannot be too large to avoid damaging the roughness meter 12, storing the position information of the electric linear slide rail C6 at the moment, measuring the next roughness position of the curved surface, and repeating the steps.
(7) Repeating steps (5) and (6) if the measurements show a surface roughness Ra after grit blasting of less than 6 μm; if the measurement shows that the surface roughness Ra after the sand blasting treatment is more than or equal to 6 mu m, the electric linear slide rail 6 and the electric linear slide rail 14 are adjusted to the original point, and the integrated fixing frame 4 is rotated by 180 degrees by rotating the electric rotary table 3 to prepare for the thermal spraying process.
(8) Calling or adjusting the technological parameters of the thermal spraying gun 8 in the integrated control computer 31, opening the infrared thermometer 7, and monitoring the surface temperature of the part 33 to be processed in real time; igniting, operating the program, preheating, feeding powder when the temperature of the part 33 to be processed exceeds 50 ℃, and performing a thermal spraying process, wherein the temperature of the part 33 to be processed is strictly controlled in the spraying process, different materials have different temperature limits, for example, 0Cr13Ni5Mo stainless steel is required to keep the temperature of the part 33 to be processed not to exceed 120 ℃, so as to avoid the phenomenon that the part 33 to be processed is deformed due to overlarge thermal stress and the coating is cracked. When the temperature approaches the temperature limit, the air adjustment valve 30 is opened to air-cool the workpiece 33.
(9) And (5) after the thermal spraying is finished, simultaneously, the temperature of the part 33 to be processed is reduced to room temperature, and the step (6) is repeated to measure the roughness of the surface of the coating and record the roughness.
(10) After the measurement is finished, the roughness meter 12 is moved to the original point through the electric linear slide rail 6; the thermal spraying gun 8 is retracted to the internal origin of the integrated fixing frame 4 through the electric linear slide rail 5 and the electric lifting table 34; and (5) closing an equipment gas source and a power supply, and completing the whole preparation process flow of the thermal spraying coating.
Claims (8)
1. An efficient thermal spraying process curved surface track cooperative, intelligent and environment-friendly automatic sand blasting device is characterized by comprising a sand blasting head and thermal spraying gun fixed linkage module, a real-time sand blasting recycling module, a programmable six-axis manipulator, a surface roughness detection module, a surface temperature detection module and a computer intelligent control module;
the sand blasting head and thermal spraying gun fixing linkage module comprises an integrated fixing frame, three linear electric sliding rails, an electric lifting table and an electric rotary table; the electric turntable is connected with the programmable six-axis manipulator; the integrated fixing frame is connected with the electric turntable and can rotate along the axis of the integrated fixing frame; the integrated fixing frame is box-shaped, the electric lifting platform is arranged in the integrated fixing frame, a linear electric sliding rail is arranged on the electric lifting platform, a thermal spraying gun is arranged on the linear electric sliding rail, the thermal spraying gun can extend out of or retract into the integrated fixing frame according to use requirements, and 2-dimensional motion can be carried out through the electric lifting platform and the linear electric sliding rail, so that the position is adjusted to be cooperated with the walking track of the sand-blasting head; the other two linear electric sliding rails are arranged on the outer side surface of the integrated fixing frame, one linear electric sliding rail is provided with a sand blasting head, and the other linear electric sliding rail is provided with a surface roughness detection module and a protective cover thereof;
the real-time sand blasting recycling module is used for performing sand blasting, sand sucking and dust removal on a part to be processed, and all power of the module is provided by dry compressed air;
the programmable six-axis manipulator is used for programming the spraying and sand blasting tracks of the complex curved surface;
the surface roughness detection module is used for measuring the roughness of the part to be processed after the sand blasting is finished;
the surface temperature detection module and the thermal spraying gun are fixed on the same linear electric slide rail and are used for monitoring the surface temperature of the part to be processed in the spraying process in real time;
the computer intelligent control module is used for controlling the process parameters and collecting the measurement data.
2. The intelligent and environment-friendly automatic sand blasting device with cooperative curved surface track for the high-efficiency thermal spraying process as claimed in claim 1, wherein the integrated fixing frame is of a hollow cuboid structure, two end faces are square, four side faces are rectangular, one side face and one end face are movable and can be opened and closed, and when the thermal spraying gun is retracted inside the integrated fixing frame, the movable side face and the movable end face can be automatically closed under the action of elastic force; when the electric lifting platform drives the thermal spraying gun to rise, the thermal spraying gun can pass through the movable side face of the integrated fixing frame, and when the linear electric sliding rail drives the thermal spraying gun to be close to a part, the thermal spraying gun can pass through the movable end face of the integrated fixing frame.
3. The automatic sand blasting device with the cooperative, intelligent and environment-friendly curved surface track for the high-efficiency thermal spraying process as claimed in claim 1, wherein the real-time sand blasting recycling module comprises a sand blasting head, a sand blasting head sand suction cover, a sand blasting head sealing brush, a sand output pipe, a sand recycling pipe, a sand blasting air inlet pipe, a sand screening net, a sand storage tank and a dust removal device;
the sand blasting head is of a three-hole sand blasting head structure, one hole is connected with a sand blasting air inlet pipe, the other hole is connected with a sand output pipe, and the other hole is an air outlet and sand outlet, namely a sand blasting nozzle; the other end of the sand output pipe is connected with a sand screening net; the sand-sucking cover of the sand-blasting head adopts a horn-shaped structure, the sand-sucking cover of the sand-blasting head is provided with a sand-sucking port, the sand-sucking port is connected with a sand recovery pipe, and the other end of the sand recovery pipe is connected with a sand storage tank; the sand-blasting nozzle of the sand-blasting head is hermetically connected with the sand-sucking cover of the sand-blasting head; the other end of the sand-blasting head sand-sucking cover is connected with the sand-blasting head sealing brush in a sealing manner, the sand-blasting head sealing brush adopts double-layer sealing, the inner layer adopts a wire mesh for relieving the impact force of sand scattering outwards and dividing air flow, and the outer layer adopts a rubber material for improving the sealing performance between the sand-blasting head sand-sucking cover and the curved surface of a part and improving the suction force of a sand-sucking opening;
the sand screening net is made of a stainless steel net and is arranged in the sand storage tank, and the sand storage tank is also provided with a sand unloading opening; the waste sand and dust in the sand storage tank enter a dust removal device through a pipeline for dust removal, filter cotton is arranged in the dust removal device, and the dust removal device is also provided with a dust removal air leakage opening and a waste sand collection opening;
compressed air is connected with a sand blasting air inlet pipe, a sand storage tank air inlet pipe and a dust removal device air inlet pipe through a gas four-way joint, and each air inlet pipe is respectively provided with an air regulating valve C, an air regulating valve D and an air regulating valve B for regulating the air outlet quantity of the compressed air so as to regulate the sand blasting pressure, the suction force of a sand suction port and the dust removal power; and the sand output pipe is also provided with an air regulating valve A for regulating the sand output.
4. The automatic sand blasting device with the cooperative, intelligent and environment-friendly curved surface track for the high-efficiency thermal spraying process as claimed in claim 1, wherein the surface roughness detection module comprises a spring telescopic rod, a pressure sensor, a roughness meter, an electric linear slide rail and a spring telescopic rod adaptor, and the spring telescopic rod adaptor is fixed on the electric linear slide rail through bolts; the spring telescopic rod adaptor is fixed on the electric linear slide rail; one end of the spring telescopic rod is fixed on the spring telescopic rod adaptor, the other end of the spring telescopic rod is connected with a roughness meter, and the roughness meter and the spring telescopic rod can be connected by a movable hinge so as to adapt to roughness measurement of curved surface parts; and a pressure sensor is also arranged in the spring telescopic rod and used for measuring the pressure of the surface of the roughness meter and the part to be measured.
5. The intelligent and environment-friendly automatic sand blasting device with cooperative curved surface track for the high-efficiency thermal spraying process as claimed in claim 4, wherein the spring telescopic rod comprises a fixed end and a telescopic end, and the fixed end is connected with the telescopic end through a spring; the pressure sensor is arranged at the fixed end, the other end of the pressure sensor is connected with the spring, and the pressure between the roughness meter and the surface of the part can be measured in real time; the roughness meter is arranged at the telescopic end of the spring telescopic rod; the spring telescopic rod adaptor is provided with a groove, the fixed end of the spring telescopic rod is positioned in the groove, and the side surface freedom degree of the spring telescopic rod is limited by the spring telescopic rod adaptor in a tightening mode.
6. The automatic sand blasting device with the cooperative, intelligent and environment-friendly curved surface track for the high-efficiency thermal spraying process according to claim 1 is characterized in that the surface temperature detection module comprises an infrared thermometer and a fixed connecting piece, the fixed connecting piece and the thermal spraying gun are fixed on the same linear electric slide rail, and the infrared thermometer is fixed on the fixed connecting piece.
7. The automatic sandblasting apparatus with cooperative curved surface trajectory, intelligence and environmental protection for high-efficiency thermal spraying process as claimed in claim 1, wherein said computerized intelligent control module comprises a process parameter control part and a measurement data collection part; the process parameter control part is used for controlling sand blasting process parameters and spraying process parameters, the sand blasting process parameters comprise sand blasting pressure, sand discharging amount and sand suction pressure, and the spraying process parameters comprise air, nitrogen, fuel, oxygen flow and pressure numerical values; the measurement data collection part is used for collecting the measurement data of the surface temperature and the roughness of the part after sand blasting or spraying.
8. An efficient thermal spraying process curved surface track cooperative, intelligent and environment-friendly automatic sand blasting method is characterized in that the method is realized based on the device as claimed in any one of claims 1-7, and specifically comprises the following steps:
the method comprises the following steps: fixing a part to be processed on a station, and cleaning oil stains on the surface of the part by alcohol;
step two: installing a thermal spraying gun and a sand blasting head of required models on a linear electric sliding rail, and enabling the distance between the axis of the thermal spraying gun barrel and the axis of the sand blasting head to be equal to the distance between the axis of an electric rotary table and the axis of the electric rotary table through an electric lifting table so as to ensure that the axis of the thermal spraying gun barrel and the axis of the sand blasting head are on the same line after the electric rotary table rotates 90 degrees or 180 degrees; adjusting respective linear electric slide rails to ensure that the action surfaces of the thermal spraying gun and the sand blasting head are in the same plane, namely the distance from the mouth of the thermal spraying gun to the plane is the reasonable spraying distance of the thermal spraying gun, and the distance from the mouth of the sand blasting head to the plane is the reasonable sand blasting distance; the positions of the two linear electric sliding rails and the electric lifting platform are stored in a computer, and the thermal spraying gun is contracted inside the integrated fixing frame;
step three: operating the programmable six-axis manipulator, programming a sand blasting track, enabling the flexible sand blasting head sealing brush to be always tightly attached to the surface of the part in the track stroke, and storing a plurality of roughness measurement positions of the part to be processed; compressed air is introduced, an air regulating valve C and an air regulating valve B of a sand blasting air inlet pipe are opened, an air regulating valve A of a sand output pipe and an air regulating valve D of a sand storage tank air inlet pipe are closed, the surface of a part to be processed is cleaned through the compressed air, and the programmed program is automatically run in a trial mode, so that no problem exists in the program; the air regulating valves of all pipelines adopt electromagnetic valves, and can be controlled manually or by a computer intelligent control module;
step four: opening all air regulating valves, and adjusting the air flow pressure and the sand output of the sand blasting process parameters; automatically operating a programmable six-axis manipulator program to perform sand blasting; after the sand blasting is finished, closing each air regulating valve, and moving the programmable six-axis manipulator to the roughness measuring position stored in the third step;
step five: moving the linear electric slide rail provided with the roughness meter, adjusting the position of the roughness meter through the feedback of the pressure sensor and the linear electric slide rail, and measuring the surface roughness of the part to be processed by using the roughness meter after the position is adjusted; after the surface roughness measurement is finished, retracting the roughness meter into the protective cover; if the roughness does not meet the requirement, repeating the sand blasting process again; the roughness meets the requirement, the sand blasting head is contracted to the original safe position through the linear electric sliding rail, and the next step is carried out;
step six: moving the thermal spraying gun to the position stored in the second step through the electric lifting table and the linear electric sliding rail; rotating the thermal spraying gun through an electric turntable to enable the thermal spraying gun to be located at the position where the sand spraying head is located; igniting the thermal spraying gun, operating the program compiled in the step three, preheating and spraying; in the spraying process, the surface temperature of the part to be processed is monitored by an infrared thermometer all the time, and when the temperature is too high, an air regulating valve of a sand blasting air inlet pipe is independently opened for air cooling;
step seven: and after the spraying is finished, waiting for the surface temperature of the machined part to be reduced to the room temperature, and measuring and recording the roughness of the coating.
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| CN113580025A (en) * | 2021-07-14 | 2021-11-02 | 中国长江三峡集团有限公司 | Mecanum wheel brake door panel spraying device with uniform stress and control method |
| CN115142647A (en) * | 2022-08-16 | 2022-10-04 | 杭州恒烽科技有限公司 | Handheld paint spraying equipment |
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| Publication number | Publication date |
|---|---|
| CN111958504B (en) | 2022-02-08 |
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