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CN-121988512-A - Micro-laser curing process and equipment for aluminum and aluminum alloy paint spraying

CN121988512ACN 121988512 ACN121988512 ACN 121988512ACN-121988512-A

Abstract

The invention discloses a micro-laser curing process and equipment for aluminum and aluminum alloy paint spraying, and relates to the technical field of metal laser surface treatment, comprising the following steps of S1, enabling aluminum and aluminum alloy profiles to pass through a polishing device, wherein the polishing device comprises a four-side rotor steel-copper wire net brush and a high-speed brush which are driven by a micro motor; the aluminum and aluminum alloy paint spraying micro-laser curing process and equipment are characterized in that a polishing device comprising a micro-motor driving four-side rotor steel copper wire net brush and a high-speed brush, an adsorption exhaust system, a venturi effect-based closed-loop paint spraying device and an energy-adjustable laser curing device are adopted to set up the process steps of polishing, dedusting, closed-loop spraying and laser instant curing in a continuous production line, so that water resource consumption, gas energy consumption, waste water and waste gas emission in the production process are reduced, and equipment investment, labor cost and environmental protection treatment cost are greatly reduced while the uniformity, adhesive force and quality stability of a coating are ensured.

Inventors

  • Yu Shangen

Assignees

  • 贵州人和昌烧坊酒业有限公司

Dates

Publication Date
20260508
Application Date
20260328

Claims (8)

  1. 1. The micro-laser curing process for aluminum and aluminum alloy paint spraying is characterized by comprising the following steps of: s1, enabling aluminum and aluminum alloy sections to pass through a polishing device, wherein the polishing device comprises a four-side rotor steel copper wire net brush and a high-speed brush driven by a micro motor so as to remove greasy dirt and burr particles on the surfaces of the sections; S2, in the polishing treatment step, collecting particle dust generated in the polishing process through an adsorption exhaust system; S3, conveying the polished section bar to a paint spraying device, wherein the paint spraying device comprises a vacuum paint spraying gun, spraying paint through a vacuum pump under the conditions of constant temperature of 30-35 ℃ and high pressure, and atomizing and spraying the surface of the section bar through a plurality of nozzles at the upper part, the lower part, the left part and the right part; S4, in the spraying step, air flow circulation is formed through Venturi effect, so that air and unattached paint generated in the spraying process circulate in the paint spraying device and are not discharged; S5, conveying the sprayed profile to a laser curing device, wherein the laser curing device comprises a closed curing box, at least one group of laser emission gun nozzles with adjustable energy intensity are arranged in the box, and the coating on the surface of the profile is cured by releasing laser beams; And S6, bundling and stacking the solidified section bars.
  2. 2. The micro-laser curing process for aluminum and aluminum alloy paint spraying according to claim 1, wherein in the step S3, the used paint is an acrylic acid ester water paint, and the components are water emulsion with the solid content of 40% and the water content of 60%.
  3. 3. The micro laser curing process for aluminum and aluminum alloy spray paint according to claim 1, wherein in step S5, the output energy of the laser emission gun nozzle is adjusted according to the thickness and hardness requirements of the coating.
  4. 4. The micro laser curing process for aluminum and aluminum alloy paint spraying according to claim 1, wherein the thickness of the single-pass coating formed in the step S3 is 20-30 micrometers, and when a thicker coating is required, the step S3 and the step S5 are repeated at least once.
  5. 5. The micro-laser curing process for aluminum and aluminum alloy paint spraying according to claim 1, wherein in the step S3, the air-up rate of the paint is 98%.
  6. 6. The micro-laser curing equipment for aluminum and aluminum alloy paint spraying is suitable for the micro-laser curing process for aluminum and aluminum alloy paint spraying according to any one of claims 1 to 5, and comprises a paint spraying unit and a laser curing unit, and is characterized in that the paint spraying unit comprises a paint spraying workshop (1), a vacuum pump (2) is installed at the top of the paint spraying workshop (1), a conveying pipe (3) is installed at the output end of the vacuum pump (2), a spray pipe (4) is installed at the front end of the conveying pipe (3), and the spray pipe (4) is manufactured by a venturi tube; The paint spraying device is characterized in that a storage box (5) is arranged at the top of the paint spraying workshop (1), a pump body (6) is arranged on the inner wall of the storage box (5), a water suction pipe (7) is arranged at the input end of the pump body (6), a water outlet pipe (8) is arranged at the output end of the pump body (6), and an atomizing nozzle (9) is arranged at the bottom end of the water outlet pipe (8).
  7. 7. The aluminum and aluminum alloy paint spraying micro-laser curing device according to claim 6, wherein the laser curing unit comprises a closed curing box (10), an energy regulator (11) is installed at the top of the closed curing box (10), a wire (12) is installed at the output end of the energy regulator (11), a laser emitter (13) is electrically connected to the bottom end of the wire (12), and the laser emitter (13) is arranged on the inner wall of the closed curing box (10).
  8. 8. The micro-laser curing process and equipment for aluminum and aluminum alloy paint spraying according to claim 7, wherein a mounting bracket (14) is inserted into the inner wall of the closed curing box (10) in a penetrating manner, and a conveyor belt (15) is arranged at the top of the mounting bracket (14).

Description

Micro-laser curing process and equipment for aluminum and aluminum alloy paint spraying Technical Field The invention relates to the technical field of metal laser surface treatment, in particular to a micro-laser curing process and equipment for aluminum and aluminum alloy paint spraying. Background The metal surface treatment technology is taken as a key means for improving the comprehensive performance of materials, plays a role in processing and applying light metals such as aluminum and aluminum alloy, and as the requirements of industrial design on the appearance, corrosion resistance and environmental adaptability of the materials are continuously improved, the surface paint treatment technology of aluminum and aluminum alloy is widely focused and developed, the traditional paint spraying technology is mainly dependent on complex pretreatment flow and high-temperature drying tunnel solidification, and although the technology achieves a certain effect in improving the quality of the coating, the problems of high energy consumption, long period, environmental pollution and the like are increasingly highlighted, and become the bottleneck for restricting the sustainable development of the industry. In the existing aluminum and aluminum alloy paint spraying and curing technology, the problems are that huge energy consumption and potential heat loss and cold risk are caused by the traditional high-temperature drying tunnel curing mode, the whole workpiece needs to be heated for a long time by the high-temperature drying tunnel so as to ensure that the coating reaches the required curing degree, a large amount of energy is consumed in the process, the production cost is increased, irreversible heat damage is possibly caused to an aluminum substrate due to the effect of thermal stress, the mechanical property and the processing precision of a material are influenced, in addition, the adhesive force of the coating is possibly reduced due to the difference of the thermal expansion coefficients of the coating and a base material in the high-temperature environment, and the service life of a product is shortened, so that the coating needs to be improved. Disclosure of Invention The invention aims to provide a micro-laser curing process and equipment for aluminum and aluminum alloy paint spraying, which are used for solving the problems that a high-temperature drying tunnel curing mode in the prior art is high in energy consumption and easy to cause thermal damage to an aluminum substrate. In order to achieve the purpose, the invention provides the following technical scheme that the micro-laser curing process for aluminum and aluminum alloy paint spraying comprises the following steps: s1, enabling aluminum and aluminum alloy sections to pass through a polishing device, wherein the polishing device comprises a four-side rotor steel copper wire net brush and a high-speed brush driven by a micro motor so as to remove greasy dirt and burr particles on the surfaces of the sections; S2, in the polishing treatment step, collecting particle dust generated in the polishing process through an adsorption exhaust system; S3, conveying the polished section bar to a paint spraying device, wherein the paint spraying device comprises a vacuum paint spraying gun, spraying paint through a vacuum pump under the conditions of constant temperature of 30-35 ℃ and high pressure, and atomizing and spraying the surface of the section bar through a plurality of nozzles at the upper part, the lower part, the left part and the right part; S4, in the spraying step, air flow circulation is formed through Venturi effect, so that air and unattached paint generated in the spraying process circulate in the paint spraying device and are not discharged; S5, conveying the sprayed profile to a laser curing device, wherein the laser curing device comprises a closed curing box, at least one group of laser emission gun nozzles with adjustable energy intensity are arranged in the box, and the coating on the surface of the profile is cured by releasing laser beams; And S6, bundling and stacking the solidified section bars. Further, in step S3, the coating material used is an acrylic acid ester water paint whose composition is an aqueous emulsion having a solid content of 40% and a water content of 60%. Further, in step S5, the output energy of the laser emission gun nozzle is adjusted according to the thickness and hardness requirements of the coating. Further, the thickness of the single-pass coating formed in the step S3 is 20-30 micrometers, and when thicker coating is needed, the step S3 and the step S5 are repeated at least once. Further, in step S3, the gassing rate of the dope is 98%. The micro laser curing device comprises a paint spraying unit and a laser curing unit, wherein the paint spraying unit comprises a paint spraying workshop, a vacuum pump is installed at the top of the paint spraying workshop, a conveying pipe is installed at the out