KR100721974B1 - Washing method of metal components - Google Patents

Abstract

The present invention relates to a method for cleaning metal parts capable of performing rust prevention treatment without generating environmental pollutants by removing foreign substances on processed metal parts using neutral detergent which is harmless to human body.

Such metal parts cleaning method includes an ultrasonic cleaning process in which the processed metal parts are put in a washing tank containing a neutral detergent solution and ultrasonic waves are used to remove foreign substances on the surface during processing, and after the cleaning process is completed, air is applied to the surface of the parts. Spraying to remove the agglomerated cleaning liquid on the surface of the part, spraying a rust-preventing liquid on the surface to prevent rust generation of the metal part from which the cleaning liquid is removed and to store it for a long time, and drying the applied rust-preventing liquid It provides a method for cleaning metal parts comprising a.

In the drying process, air drying is performed continuously after minimizing the thickness of the anti-corrosive liquid applied to the surface of the component so as to be dried in a short time.

Ultrasonic Cleaning, Metal Parts, Antirust, Drying, Antirust

Description

Metal Part Cleaning Method {WASHING METHOD OF METAL COMPONENTS}

1 is a process diagram of a method for washing metal parts according to the present invention.

Figure 2a is a side view of the cleaning device to explain the cleaning of metal parts in accordance with the method for cleaning metal parts of the present invention.

Figure 2b is a plan view of the cleaning device to explain the cleaning of the metal parts in accordance with the metal parts cleaning method of the present invention.

The present invention relates to a method for cleaning metal parts, and more particularly, to remove foreign substances on processed metal parts by using a neutral detergent that is harmless to the human body, which can continuously perform rust prevention treatment without generating environmental pollutants. It relates to a washing method.

In general, when washing metal parts coated with a large amount of processing oil, a washing method is performed in which pickling is performed using acid, which is a chemical. Such pickling requires several processes such as preliminary degreasing step, main degreasing step, first washing step, pickling step, second washing step, and third washing step, and the metal parts subjected to excessive force are pickling performed. As a result of defects due to hydrogen embrittlement, the brittle removal heat treatment is performed.

However, in this process, if acid component remains on the surface of the metal parts and rust is not completely dried in the drying step after the washing step, rust occurs at room temperature and atmospheric pressure in the air.

The method of pickling metal parts is a simple method of washing with water after applying a acid, which is a cleaning agent, to the surface of the product, but since the cleaning agent is strongly acidic, you must wear protective equipment and work with caution.

Since the pickling is necessary to wash the acid with water, wastewater, which is an environmental pollutant, is inevitably generated, and the wastewater is collected and reprocessed in a professional wastewater treatment plant.

In addition, in order to remove carbides and foreign substances generated during the processing of the surface of the metal parts and to perform the rust prevention process at the same time, the rotary cleaning by spraying and rotating the cleaning liquid may be performed. Scratches occur in the case of metals processed to a thin thickness, such as threads, and the parts cannot be used due to the cutting of threads.

In addition, by preventing the contact with oxygen in the air by impregnating and dipping metal parts in hydrocarbon-based oils such as diesel oil, the rust prevention process prevents the occurrence of rust by oxidation, but hydrocarbon-based oil such as diesel oil It is harmful to human body by causing evaporation of air in the workplace and causing acute or chronic poisoning due to the toxicity of light oil, skin disease, etc.

The present invention has been made to solve the conventional problems as described above, the object of the present invention is to clean the metal parts using a neutral detergent harmless to the human body by ultrasonic washing and anti-rust treatment does not require the washing process by washing after washing The present invention provides a method for cleaning metal parts that performs antirust treatment continuously while preventing the discharge of environmentally harmful substances.

Metal parts cleaning method proposed by the present invention,

Ultrasonic cleaning process to remove the foreign matter on the surface when the processed metal parts are put into the cleaning tank containing the neutral detergent solution and applying ultrasonic waves, and after the cleaning process is completed by spraying air on the surface of the components to agglomerate A method for cleaning metal parts, comprising the steps of removing the cleaning solution, spraying the anti-corrosive solution on the surface to prevent rusting of the metal parts from which the cleaning solution has been removed, and to store for a long time To provide.

In the drying process, air drying is performed continuously after minimizing the thickness of the anti-corrosive liquid applied to the surface of the component so as to be dried in a short time.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in more detail.

1 is a process diagram for explaining a method for cleaning metal parts according to the present invention, Figures 2a and 2b is a side view and a plan view of the cleaning device to explain the cleaning of metal parts according to the method for cleaning metal parts of the present invention. As a drawing, first, when a metal part (not shown) is manufactured in order to perform the metal part cleaning method of the present invention, it is put into a storage unit 2 for temporarily storing these parts.

The storage unit 2 is provided with a loading device 4 for loading the metal parts to the outside of the storage unit is loaded with a certain amount of parts from the storage unit and put into the conveyor (6) transfer device to convey the metal parts to the conveyor (6) The parts can be cleaned through the cleaning process described later while being transported in the seat.

The loading device (4) is to load the parts to be washed in the inlet conveying type by the drive of the motor (8) to convey to the conveyor (6), the speed can be changed according to the volume and weight of the metal parts.

The parts stored in the storage unit 2 are drawn out through the loading device 4, and are put into the washing tank 12 constituting the washing device 10 while being seated on the conveyor 6 to perform a washing process. .

The washing process is performed while the metal parts are immersed in the washing liquid contained in the washing tank 12 while the metal parts are seated on the conveyor 6, and the washing process is performed. In this washing process, the ultrasonic generator 14 is applied to the washing liquid inside the washing tank 12. Ultrasonic cleaning is performed by applying ultrasonic wave by).

The ultrasonic generator 14 may use a conventional apparatus in which a plurality of ultrasonic vibration units are installed to generate a predetermined wavelength, and the ultrasonic cleaning process may use a method commonly used, and thus, detailed description thereof will be omitted.

In the ultrasonic cleaning, the washing solution in the washing tank 12 may use hydrocarbon-based, water-soluble alkali or acidic washing liquid, but for the safety of the operator, it is optimal to use a neutral aqueous alkaline solution mixed with water, and the washing tank 12 is In consideration of the degree of metal corrosion caused by the cleaning solution, it is recommended to use corrosion resistant stainless steel SUS304 or SUS316.

And in order to improve the washing power, the washing liquid may be used by heating by electric heater heating method from room temperature to 100 ℃.

The washing liquid is connected to the lower portion of the washing tank 12 by the conduit 16 to circulate through the washing liquid filtration device 18 to filter the washing liquid to remove impurities and reuse it so that the washing liquid can be continuously used.

Filtration of the cleaning liquid is the cleaning liquid flows into the filtration device 18 along the conduit 16 connected to the cleaning tank 12, the oil from the surface of the metal parts contained in the cleaning liquid in the filtering device 18, chips after metal processing, etc. The same impurities are filtered by a method of removing them from the tower-type airtight device which collects and removes them from the collecting bag 20.

The collection bag 20 of the tower type encapsulation device collects a general metal chip, and in the case of oil introduced with the cleaning liquid, a certain amount of oil-absorbing plastic powder is introduced into the collection bag 20 to remove the oil by physical adsorption. do. In this case, when the oil absorbent plastic powder absorbs oil, it is preferable to add an appropriate amount according to the amount of oil because the volume becomes large.

The washing liquid introduced into the washing liquid filtration device 18 and filtered cleanly is returned to the washing tank 12 along the conduit 24 by the driving of the pump 22, or along the conduit 28 by the driving of the other pump 26. It is sprayed at high pressure through the spray nozzle 30 at the end of the washing tank 12 to rewash the metal parts placed on the conveyor 6 and fall back to the washing tank 12.

As a result, the metal parts are immersed in the cleaning liquid and subjected to the ultrasonic cleaning process, and then the high-pressure cleaning is performed as it exits from the immersion liquid, thereby further increasing the cleaning effect.

When the washing liquid of the washing tank 12 is evaporated and the amount of washing liquid is reduced, the washing liquid filtration device 18 detects the liquid level and opens the solenoid valve 34 in the washing liquid auxiliary tank 32 to feed the filtered washing liquid into the filtration tank. By supplying to the washing tank 12, the washing liquid of the washing tank is to maintain a constant height at all times.

The metal parts washed in this way are transferred to the conveying conveyor 6 while passing through the air cleaning device, and the air cleaning process is performed.

This air washing process eliminates the waste water generated at the time of washing by omitting the washing step generated by the conventional pickling process by removing the washing liquid aggregated on the metal surface with high pressure air.

The air washing process removes the cleaning liquid from the surface of the part by receiving the high pressure air supplied from the compressor or the like through the conduit 36 and spraying the upper and lower parts of the part through the injection nozzle 38.

When the air washing is completed as described above, the parts are transferred to the rust preventive device while being seated on the transfer conveyor 6 to perform a rust preventive process of applying the rust preventive solution to the surface of the parts.

In this rust prevention process, the rust preventive liquid of the rust preventive liquid storage tank 40 may be transferred through the pipe line 44 by the driving of the motor 42 to spray the component through the injection nozzle 46 to apply the rust preventive liquid.

At this time, the rust preventive solution can be used by heating the electric heater heating method up to 100 ℃ at room temperature so as to dry quickly like the washing solution.

The rust preventive liquid is filtered by the filtering device installed therein to prevent the rust preventive liquid returned to the rust preventive liquid tank 40, and the amount of the rust preventive liquid is detected from the rust preventive storage tank 40 by the liquid level detection. Therefore, the solenoid valve is automatically replenished by the anti-corrosive liquid auxiliary tank 48.

The anti-corrosive liquid can be a general water-soluble anti-corrosive liquid when the storage period before use of the cleaned metal parts is short. Alternatively, when the storage period is long or the storage environment is poor, anti-corrosive oil may be used.

However, high-pressure spraying is possible in the case of using general water-soluble rust preventive liquids, but when spraying rust preventive liquids such as diesel fuel, the steam generation should not be suppressed and heated at low pressure, and to prevent acute poisoning and chronic poisoning of diesel oil. Ensure complete exhaust.

In this way, the rust-preventing metal parts are pre-treatment in the drying process of rust-preventing liquids. By spraying to the parts through the multi-stage injection nozzle 50 can be carried out a pretreatment process.

In this case, the sprayed air acts as an air curtain to prevent the inflow into the drying apparatus used in the drying process in which hot hot air is generated as a post process in the case of rust preventive liquids such as diesel fuel. Together, it plays a role of circulating steam or mist of the rust preventive liquid generated from the drying device only in the rust preventive device and forcibly discharging it to the outside.

When this process is completed, the parts are transferred to the drying apparatus in a state seated on the conveyor 6 to perform a drying process.

The drying apparatus used in the drying process is composed of a heater 52 and a blower 54 for blowing the heat generated by the heater 52 to the metal parts conveyed along the conveyor 6.

In this way, when the rust preventive liquid on the surface of the component is dried by hot air drying, when the hydrocarbon-based rust preventive liquid is used, the same effect as that of the air curtain can be obtained, thereby preventing the risk of fire prevention and explosion protection.

During the drying process, the drying apparatus may control the temperature in the drying apparatus through temperature control of the heater 52, and may be set to a high temperature when using a hydrocarbon-based rust preventive solution and to a high temperature when using an aqueous rust preventive solution.

When the drying process is completed, the metal parts are washed and rust-prevented. The metal parts are transported along the transfer conveyor 6, and then dropped to another conveyor 56, and then dropped into the storage unit 58 and stored. do.

As described above, the method for cleaning metal parts according to the present invention does not require a water washing process and thus does not generate environmentally hazardous substances and generate waste water.

In addition, since the washing process and the rust preventive work are continuously performed, the machining work of the parts can be performed quickly and efficiently. In addition, rust preventives that can cause fire and explosion can be freely used by blocking and forcibly discharging rust preventive vapors and mists by high pressure air spraying before and after rust prevention work.

Claims (5)

Ultrasonic cleaning process to put the processed metal parts into a cleaning tank containing a neutral detergent solution and to remove foreign substances on the surface when the parts are processed by applying ultrasonic waves; After the cleaning process is completed, spraying air on the surface of the component to remove the washing liquid aggregated on the surface of the component; Spraying a rust preventive solution on a surface to prevent rust generation of the metal parts from which the cleaning solution is removed and to store for a long time; Drying the anticorrosive liquid applied above; Metal parts cleaning method comprising a. The method of claim 1, wherein the cleaning solution used in the ultrasonic cleaning process is introduced into the cleaning solution filtration apparatus, and filtered cleanly, and when the liquid is returned to the cleaning tank, the cleaning solution is sprayed at a high pressure through the spray nozzle to wash the metal parts again. The method of claim 1, after the rust prevention process is completed in order to perform a quick drying by spraying a high-pressure air to the parts to remove the residual amount of the rust preventive solution excessively buried in the metal parts while the antirust solution is a thin film over the entire metal parts A method of cleaning metal parts in which a pretreatment step of injecting high-pressure air into the parts is performed to form. The air curtain of claim 3, wherein the pretreatment process prevents inflow of steam or mist generated from the rust preventive solution into a drying process in which hot hot air is generated as a post process when anticorrosive liquid such as diesel is applied. How to wash metal parts. The method of claim 1, wherein after the ultrasonic cleaning process, the washing solution is to remove impurities from the collection bag through the filtration step, the oil flowing into the filtration device with the washing liquid is physically adsorbed oil by the oil-absorbing plastic powder in the collection bag. Method for cleaning metal parts removed by

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