Cleaning process and cleaning equipment for active metal parts

Abstract

The invention relates to the technical field of active metal cleaning processes, in particular to a cleaning process and cleaning equipment for active metal parts. The cleaning technology comprises the steps of ultrasonic cleaning, immersion rinsing, spraying cleaning and surface drying, and the cleaning equipment comprises at least one ultrasonic cleaning water tank, at least one rinsing water tank, at least one spraying water tank and a drying box which are sequentially arranged and connected into a whole. An automatic conveying mechanism is arranged in the ultrasonic cleaning water tank, the rinsing water tank, the spraying water tank and the drying box. According to the cleaning process, plasma water is adopted for cleaning the surface of the active metal part, the cleaning process comprises the three steps of ultrasonic cleaning, rinsing and spraying washing, the surface of the active metal part can be rapidly, effectively and safely cleaned, and damage to the surface of the active metal part is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of active metal cleaning technology, in particular to a cleaning technology and cleaning equipment for active metal parts. Background Art

[0002] In the prior art, active metal parts are generally cleaned by adding chemical cleaning agents to tap water to prepare a cleaning solution. The surface of the active metal parts is first sprayed and ultrasonically cleaned with the prepared cleaning solution, then rinsed to remove the cleaning agent residue on the surface of the active metal parts, and finally the surface of the active metal parts is dried by hot air.

[0003] There are some problems with existing cleaning methods: First, the use of cleaning agents may oxidize the metal surface or corrode the coating and electroplating layer on the metal surface. Some cleaning agents may also form a film layer on the surface of the workpiece. Especially when cleaning at high temperatures, the residual cleaning agent film layer on the metal surface may interfere with future processing steps and cause product defects. Secondly, the cleaning wastewater generated requires special treatment and has high disposal costs. Third, the temperature of active metal parts is high after cleaning. Directly using heated air to blow during drying will cause oxidation on the surface, and in severe cases, it may even cause the parts to be scrapped. Summary of the invention

[0004] In response to the shortcomings of the above-mentioned existing production technology, the present application provides a cleaning process and cleaning equipment for active metal parts, which can quickly, effectively and safely clean and dry the surface of active metal parts, avoid damage to the surface of active metal parts, and avoid the formation of oxide layers and residual film layers of cleaning agents during the cleaning and drying process.

[0005] The technical solution adopted by the present invention is as follows: A cleaning process for active metal parts comprises the following steps: Ultrasonic cleaning: first immerse the active metal parts in the deionized water in the ultrasonic cleaning tank, turn on the three-frequency composite ultrasonic module to perform ultrasonic cleaning on the active metal parts. During cleaning, three different frequencies of ultrasonic waves are used in combination to generate tiny bubbles in the deionized water. The impact force generated by the tiny bubbles on the surface of the parts decomposes and removes the dirt. Immersion rinsing: The active metal parts that have been ultrasonically cleaned are immersed in the deionized water in the rinsing tank, and the deionized water is used to rinse the active metal parts to further remove dirt on the surface of the active metal parts; Spray cleaning: The active metal parts that have been immersed and rinsed enter the spray water tank, and the spray equipment sprays deionized water on the surface of the active metal parts; Surface drying: The active metal parts that have been spray-cleaned are placed in a drying oven for drying. First, large water droplets on the surface of the active metal parts are purged with hot nitrogen. After the hot nitrogen purging is completed, the vacuum pump is turned on to evacuate the drying oven to -1 bar and maintain the vacuum state for 3 to 5 minutes to allow small water droplets on the surface of the active metal parts to evaporate quickly and reduce the temperature. After the surface of the active metal parts is dried, the active metal parts are taken out.

[0006] Further, the active metal parts were subjected to three consecutive ultrasonic cleanings, two consecutive immersion rinsings, and two consecutive spray cleanings.

[0007] Furthermore, during the ultrasonic cleaning, immersion rinsing and spray cleaning processes, in order to reduce the cleaning time, the deionized water used to clean the active metal parts is circulated and filtered through a circulating filtration system, thereby ensuring the cleanliness of the deionized water.

[0008] Furthermore, during the ultrasonic cleaning, immersion rinsing, spray cleaning and surface drying processes, the active metal parts are placed in a nitrogen atmosphere to prevent the surfaces of the active metal parts from contacting the air.

[0009] A cleaning device for active metal parts comprises at least one ultrasonic cleaning water tank, at least one rinsing water tank, at least one spray water tank and a drying box which are sequentially arranged and connected into one body, wherein an automatic conveying mechanism is commonly arranged in the ultrasonic cleaning water tank, the rinsing water tank, the spray water tank and the drying box, and the automatic conveying mechanism can sequentially convey the active metal parts to be cleaned to each ultrasonic cleaning water tank, the rinsing water tank, the spray water tank and the drying box, a feed bin is arranged at the feed inlet of an ultrasonic cleaning water tank at the feed end, and a discharge bin is arranged at the discharge end of the drying box.

[0010] Furthermore, the ultrasonic cleaning water tank, the rinsing water tank, the spraying water tank and the drying box are all connected to a nitrogen supply mechanism, and the nitrogen supply mechanism introduces nitrogen into each box.

[0011] Furthermore, the ultrasonic cleaning water tank, the rinsing water tank and the spraying water tank are all connected to a circulating filtration system, and the circulating filtration system can circulate and filter the deionized water in each tank.

[0012] Furthermore, a three-frequency composite ultrasonic module is arranged on the ultrasonic cleaning water tank.

[0013] Furthermore, a spray mechanism is provided in the spray water tank, and the spray mechanism can spray deionized water on the surface of the active metal parts.

[0014] Furthermore, a nitrogen purge mechanism and a vacuum pumping mechanism are provided in the drying box.

[0015] The beneficial effects of the present invention are as follows: The cleaning process of the present invention does not add a cleaning agent, will not oxidize the metal surface or corrode the coating and electroplating layer on the metal surface, and also avoids the generation of a residual film layer of the cleaning agent; the cleaning process of the present invention uses plasma water to clean the surface of active metal parts, which is divided into three steps of ultrasonic cleaning, rinsing and spray water washing, and can quickly, effectively and safely clean the surface of the active metal parts to avoid damage to the surface of the active metal parts; the cleaning and drying of the present invention are both in a nitrogen atmosphere to avoid air contact with the surface of the active metal parts to cause oxidation; in the process of ultrasonic cleaning, immersion rinsing and spray cleaning of the present invention, the deionized water for cleaning the active metal parts is circulated and filtered through a circulation filtration system, thereby ensuring the cleanliness of the deionized water. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the cleaning equipment of the present invention.

[0017] Figure 2 It is a schematic diagram of the structure of the ultrasonic cleaning water tank of the present invention.

[0018] Among them: 1. Ultrasonic cleaning water tank; 2. Rinse water tank; 3. Spray water tank; 4. Drying box; 5. Automatic conveying mechanism; 6. Feed bin; 7. Discharge bin; 8. Three-frequency composite ultrasonic module; 9. Nitrogen source; 10. Air pump; 11. Centrifugal pump; 12. Filter. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0020] Embodiment 1, a cleaning process of active metal parts, the active metal material is molybdenum, comprising the following steps: 1. Ultrasonic cleaning: First immerse the active metal parts made of molybdenum in the deionized water of the ultrasonic cleaning tank, turn on the three-frequency composite ultrasonic module to perform ultrasonic cleaning on the active metal parts. During cleaning, three different frequencies of ultrasonic waves are used in combination to generate tiny bubbles in the deionized water. The impact force generated by the tiny bubbles on the surface of the parts decomposes and removes the dirt.

[0021] The conductivity of deionized water is ≤1μS / cm. Deionized water is stored in a cleaning water tank, and the active metal parts are driven into the cleaning water tank by an automatic conveying mechanism and immersed in the deionized water.

[0022] According to the need, the active metal parts can be subjected to three or more consecutive ultrasonic cleaning to improve the cleaning effect. Correspondingly, three or more sequentially connected cleaning water tanks are provided, and the active metal parts are driven by the automatic conveying mechanism to enter these cleaning water tanks in sequence to achieve three or more ultrasonic cleanings.

[0023] 2. Immersion rinsing: The active metal parts that have been ultrasonically cleaned are immersed in the deionized water in the rinsing tank. The deionized water is used to rinse the active metal parts to further remove dirt on the surface of the active metal parts.

[0024] If necessary, the active metal parts can be subjected to two or more consecutive immersion rinses to improve the cleaning effect.

[0025] 3. Spray cleaning: The active metal parts that have been immersed and rinsed enter the spray water tank, and the spray equipment sprays deionized water on the surface of the active metal parts.

[0026] As required, the active metal parts can be spray cleaned two or more times in succession to improve the cleaning effect.

[0027] In the process of ultrasonic cleaning, immersion rinsing and spray cleaning, in order to reduce the cleaning time, the deionized water used to clean active metal parts is circulated and filtered through a circulating filtration system to ensure the cleanliness of the deionized water.

[0028] The circulating filtration system includes a centrifugal pump and a filter. The centrifugal pump starts to circulate and stir the cleaning water tank to decompose and remove dirt, improve cleaning efficiency, and reduce cleaning time. The impurities washed out during the circulating stirring process are intercepted by the filter to ensure the cleanliness of the deionized water. At the same time, according to needs, the cleaning effect is guaranteed by three consecutive cleanings.

[0029] 4. Surface drying: After spray cleaning, the active metal parts are placed in a drying oven for drying. First, hot nitrogen is used to purge the large water droplets on the surface of the active metal parts. After the hot nitrogen purge is completed, the vacuum pump is turned on to evacuate the drying oven to -1 bar and maintain the vacuum state for 3 minutes to allow the small water droplets on the surface of the active metal parts to evaporate quickly and reduce the temperature. After the surface of the active metal parts is dried, the active metal parts are taken out.

[0030] During the ultrasonic cleaning, immersion rinsing, spray cleaning and surface drying processes, the active metal parts are placed in a nitrogen atmosphere to prevent the surface of the active metal parts from contacting the air. This protects the active metal parts from oxidation in the nitrogen atmosphere after they leave the deionized water, thereby reducing the risk of oxidation of the active metal parts.

[0031] Embodiment 2: A cleaning process for active metal parts, wherein the active metal material is tungsten, comprises the following steps: 1. Ultrasonic cleaning: First immerse the active metal parts made of tungsten in the deionized water of the ultrasonic cleaning tank, turn on the three-frequency composite ultrasonic module to perform ultrasonic cleaning on the active metal parts. During cleaning, three different frequencies of ultrasonic waves are used in combination to generate tiny bubbles in the deionized water. The impact force generated by the tiny bubbles on the surface of the parts decomposes and removes the dirt.

[0032] 2. Immersion rinsing: The active metal parts that have been ultrasonically cleaned are immersed in the deionized water in the rinsing tank. The deionized water is used to rinse the active metal parts to further remove dirt on the surface of the active metal parts.

[0033] 3. Spray cleaning: The active metal parts that have been immersed and rinsed enter the spray water tank, and the spray equipment sprays deionized water on the surface of the active metal parts.

[0034] 4. Surface drying: After spray cleaning, the active metal parts are placed in a drying oven for drying. First, hot nitrogen is used to purge the large water droplets on the surface of the active metal parts. After the hot nitrogen purge is completed, the vacuum pump is turned on to evacuate the drying oven to -1 bar and maintain the vacuum state for 5 minutes to allow the small water droplets on the surface of the active metal parts to evaporate quickly and reduce the temperature. After the surface of the active metal parts is dried, the active metal parts are taken out.

[0035] Embodiment 3: Figure 1 As shown, a cleaning process and cleaning equipment for active metal parts, including three ultrasonic cleaning water tanks 1, two rinsing water tanks 2, two spraying water tanks 3 and a drying box 4 which are sequentially arranged and connected into one body, and an automatic conveying mechanism 5 is commonly arranged in the three ultrasonic cleaning water tanks 1, two rinsing water tanks, two spraying water tanks 3 and one drying box 4, and the automatic conveying mechanism 5 can sequentially convey the active metal parts to be cleaned to each ultrasonic cleaning water tank 1, rinsing water tank 2, spraying water tank 3 and drying box 4 for various treatments. A feed bin 6 is arranged at the feed port of an ultrasonic cleaning water tank 1 at the feed end, and a discharge bin 7 is arranged at the discharge end of the drying box 4. During operation, the active metal parts to be cleaned are placed in the feed bin 6, and the cleaned active metal parts are taken out from the discharge bin 7.

[0036] like Figure 2 As shown, a three-frequency composite ultrasonic module 8 is arranged on the ultrasonic cleaning water tank 1. When the three-frequency composite ultrasonic module 8 is working, it uses a combination of three ultrasonic waves of different frequencies to generate tiny bubbles in the deionized water. The impact force generated by the tiny bubbles on the surface of the parts decomposes and removes dirt.

[0037] A spray mechanism is arranged in the spray water tank 3, and the spray mechanism can spray deionized water on the surface of the active metal parts.

[0038] A nitrogen purge mechanism is provided in the drying box 4, and the nitrogen purge mechanism performs nitrogen purge on the surfaces of the active metal parts in the drying box 4 to remove large water droplets on the surfaces of the active metal parts.

[0039] The nitrogen purge mechanism includes a nitrogen gas source and a nitrogen purge pump. The gas outlet of the nitrogen gas source is connected to the nitrogen purge pump. The nitrogen purge pump is connected to a nitrogen purge pipe. A heater is also provided on the nitrogen purge pipe. The heater can heat the nitrogen so that hot nitrogen is blown out of the nitrogen purge pipe.

[0040] A vacuuming mechanism is provided in the drying box 4 , and the vacuuming mechanism can evacuate the inside of the drying box 4 .

[0041] The ultrasonic cleaning water tank 1, the rinsing water tank 2, the spraying water tank 3 and the drying box 4 are all connected to a nitrogen supply mechanism, which provides a nitrogen atmosphere for the ultrasonic cleaning water tank 1, the rinsing water tank 2, the spraying water tank 3 and the drying box 4 to prevent air from contacting the active metal parts being cleaned and dried.

[0042] like Figure 2 As shown, the nitrogen supply mechanism includes a nitrogen source 9, the outlet end of the nitrogen source 9 is connected to the inlet end of an air pump 10 through a pipeline, and the outlet end of the air pump 10 is connected to the air inlet of each box through a pipeline.

[0043] The ultrasonic cleaning water tank 1, the rinsing water tank 2 and the spraying water tank 3 are all connected to a circulating filtration system, such as Figure 2 As shown, the circulating filtration system includes a centrifugal pump 11 and a filter 12 that are interconnected. The centrifugal pump 11 is started to draw deionized water from each water tank into the filter 12 for filtration, and then the filtered deionized water is passed into each water tank again, thereby circulating and stirring the deionized water in each water tank to decompose and remove dirt, thereby improving cleaning efficiency and reducing cleaning time. Impurities cleaned out during the circulating stirring process are intercepted by the filter 12 to ensure the cleanliness of the deionized water.

[0044] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A cleaning process for active metal parts, characterized in that: The steps include: Ultrasonic cleaning: first immerse the active metal parts in the deionized water in the ultrasonic cleaning tank, turn on the three-frequency composite ultrasonic module to perform ultrasonic cleaning on the active metal parts. During cleaning, three different frequencies of ultrasonic waves are used in combination to generate tiny bubbles in the deionized water. The impact force generated by the tiny bubbles on the surface of the parts decomposes and removes the dirt. Immersion rinsing: The active metal parts that have been ultrasonically cleaned are immersed in the deionized water in the rinsing tank, and the deionized water is used to rinse the active metal parts to further remove dirt on the surface of the active metal parts; Spray cleaning: The active metal parts that have been immersed and rinsed enter the spray water tank, and the spray equipment sprays deionized water on the surface of the active metal parts; Surface drying: The active metal parts that have been spray-cleaned are placed in a drying oven for drying. First, large water droplets on the surface of the active metal parts are purged with hot nitrogen. After the hot nitrogen purging is completed, the vacuum pump is turned on to evacuate the drying oven to -1 bar and maintain the vacuum state for 3 to 5 minutes to allow small water droplets on the surface of the active metal parts to evaporate quickly and reduce the temperature. After the surface of the active metal parts is dried, the active metal parts are taken out.

2. A cleaning process for active metal parts as claimed in claim 1, characterized in that: The active metal parts are subjected to three consecutive ultrasonic cleanings, two consecutive immersion rinsings and two consecutive spray cleanings.

3. A cleaning process for active metal parts as claimed in claim 1, characterized in that: In the ultrasonic cleaning, immersion rinsing and spray cleaning processes, in order to reduce the cleaning time, the deionized water used to clean the active metal parts is circulated and filtered through a circulation filtration system, thereby ensuring the cleanliness of the deionized water.

4. A cleaning process for active metal parts as claimed in claim 1, characterized in that: During the ultrasonic cleaning, immersion rinsing, spray cleaning and surface drying processes, the active metal parts are all placed in a nitrogen atmosphere to prevent the surfaces of the active metal parts from contacting the air.

5. A cleaning device for active metal parts, comprising at least one ultrasonic cleaning water tank (1), at least one rinsing water tank (2), at least one spray water tank (3) and a drying box (4) which are sequentially arranged and connected into one body, characterized in that: An automatic conveying mechanism (5) is commonly arranged in the ultrasonic cleaning water tank (1), the rinsing water tank (2), the spraying water tank (3) and the drying box (4). The automatic conveying mechanism (5) can sequentially convey the active metal parts to be cleaned to the ultrasonic cleaning water tank (1), the rinsing water tank (2), the spraying water tank (3) and the drying box (4). A feed bin (6) is arranged at the feed inlet of an ultrasonic cleaning water tank (1) at the feed end, and a discharge bin (7) is arranged at the discharge end of the drying box (4).

6. The cleaning device for active metal parts according to claim 5, characterized in that: The ultrasonic cleaning water tank (1), the rinsing water tank (2), the spraying water tank (3) and the drying box (4) are all connected to a nitrogen supply mechanism, and the nitrogen supply mechanism introduces nitrogen into each box.

7. The cleaning device for active metal parts according to claim 5, characterized in that: The ultrasonic cleaning water tank (1), the rinsing water tank (2) and the spraying water tank (3) are all connected to a circulating filtration system, and the circulating filtration system is capable of circulating and filtering the deionized water in each tank.

8. The cleaning device for active metal parts according to claim 5, characterized in that: The ultrasonic cleaning water tank (1) is provided with a three-frequency composite ultrasonic module (8).

9. The cleaning device for active metal parts according to claim 5, characterized in that: A spray mechanism is arranged in the spray water tank (3), and the spray mechanism can spray deionized water on the surface of the active metal parts.

10. The cleaning device for active metal parts according to claim 5, characterized in that: A nitrogen purge mechanism and a vacuum pumping mechanism are arranged in the drying box (4).

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