CN107413760B - Water-based environment-friendly cleaning method and cleaning device for soldering flux on radar electronic component - Google Patents
Water-based environment-friendly cleaning method and cleaning device for soldering flux on radar electronic component Download PDFInfo
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- CN107413760B CN107413760B CN201710753918.7A CN201710753918A CN107413760B CN 107413760 B CN107413760 B CN 107413760B CN 201710753918 A CN201710753918 A CN 201710753918A CN 107413760 B CN107413760 B CN 107413760B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
- F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
- F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
- F26B15/18—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by endless belts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention relates to a water-based environment-friendly cleaning method for soldering flux generated in the welding process of a radar electronic component. The cleaning object is a radar electronic component for welding the ceramic substrate and the related connector; the cleaning system comprises a cleaning clamp, a moving mechanism, a soaking ultrasonic jet cleaning mechanism, a reverse spraying rinsing mechanism, a solvent dehydration bubbling mechanism, a drying mechanism and a feeding and discharging platform. The operation steps are as follows: (1) clamping a radar electronic component to be cleaned, (2) soaking and ultrasonic jet cleaning, wherein the soaking cleaning solution is a multi-component composite water-based cleaning solution; (3) carrying out reverse spray rinsing by using pure water, (4) carrying out solvent dehydration and bubbling treatment, wherein a dehydration solvent is alcohol with the concentration of more than 95% or other volatile alcohol solution; (5) and (5) drying by hot air.
Description
Technical Field
The invention belongs to the field of automatic radar electronic batch production, and particularly relates to a method for cleaning soldering flux generated in the welding process of a radar electronic component.
Background
With the development trend of advanced radar electronic systems towards arraying, the system end has the requirement of thousands of systems for radar electronic components, and the automatic production becomes the only way for coping with the requirement of huge components and the requirement of systems for component consistency. New materials, represented by LTCC, aluminum nitride, aluminum silicon carbide, and the like, are being more and more widely applied to advanced radar electronic components, and each of the new materials has new characteristics: LTCC and aluminum nitride are porous materials, have rough surfaces and are easy to absorb fluxing agents, and cannot be simply carried out by high-power ultrasonic vibration cleaning equipment due to ceramic brittleness and the like. Aluminum silicon, aluminum silicon carbide and the like are used as the materials of the box body, the surface coating is difficult to achieve high flatness and is difficult to polish, and the probability of wrapping flux residue is high. Because radar electronics often have high requirements on reliability and overproof soldering flux residues cannot exist, the cleaning of the soldering flux residues after the assembly and welding of radar electronic components in batch production becomes a difficult problem. Solvent cleaning or gas phase cleaning is usually adopted in the industry, the soldering flux is dissolved by utilizing the high solubility of the solvent, the method applies a large amount of solvent, firstly, the environmental protection is poor, secondly, the personnel safety hidden danger exists, and the cleaning effect of ionic pollutants by the high nonpolar solvent which is forced to be selected for realizing the good cleaning effect at low temperature is general.
Disclosure of Invention
In order to solve the problems, the invention provides a water-based environment-friendly cleaning method for soldering flux generated in the welding process of a radar electronic component; meanwhile, a cleaning device is provided.
A water-based environmental protection cleaning method for scaling powder generated in the welding process of a radar electronic component is characterized in that a cleaning object is a radar electronic component provided with a ceramic substrate and a related connector which are welded; the cleaning device comprises a cleaning clamp 1, a conveyor belt 2, a soaking ultrasonic jet flow cleaning mechanism 3, a reverse spray rinsing mechanism 4, a solvent dehydration bubbling mechanism 5, a hot air drying mechanism 6, a feeding table 7, a discharging table 8 and a moving mechanism 9, and the specific operation steps are as follows:
(1) clamping radar electronic component to be cleaned
Clamping and fixing radar electronic components to be cleaned on a cleaning clamp 1, and sending the radar electronic components to a feeding table 7;
(2) immersion ultrasonic jet cleaning
The moving mechanism 9 sends the radar electronic component to be cleaned on the feeding table 7 into the soaking cleaning liquid of the soaking ultrasonic jet flow cleaning mechanism 3 through the cleaning fixture 1 for soaking ultrasonic jet flow cleaning;
soaking for 5-20 min, and then carrying out ultrasonic treatment, wherein the ultrasonic frequency is 40KHz, 80KHz, 120KHz or 170KHz, and the ultrasonic treatment time is 1-40 min;
(3) rinsing by reverse spray
The moving mechanism 9 sends the radar electronic component to be cleaned after being soaked and cleaned by ultrasonic jet flow into pure water of the reverse spray rinsing mechanism 4 for reverse spray rinsing through the cleaning clamp 1;
the pure water is deionized water, and the reverse spray rinsing time is 3-120 min;
(4) solvent dehydration bubbling
The moving mechanism 9 sends the radar electronic component subjected to the back spray rinsing into a dehydration solvent of the solvent dehydration bubbling mechanism through the cleaning fixture 1 for solvent dehydration bubbling treatment;
the dehydration solvent is alcohol with the concentration of 95 percent or more or other volatile alcohol solution with water; the treatment time is 0.5-20 min;
(5) drying by baking
The moving mechanism 9 feeds the radar electronic component subjected to solvent dehydration and bubbling into a hot air drying mechanism through the cleaning fixture 1; drying by hot air at 40-120 ℃ for 5-60 min;
the moving mechanism 9 sends the dried radar electronic component into the blanking table 8 through the cleaning clamp 1 to complete cleaning;
the concentration of ionic pollutants of the cleaned radar electronic component is less than 1.56 micrograms \ square centimeter equivalent of sodium chloride, and the total amount of flux residues is less than 40 micrograms \ square centimeter, so that the requirement of the highest cleanliness grade of GJB5807-2006 is met.
The technical scheme for further limiting is as follows:
in the step (2), the soaking cleaning solution is prepared by uniformly mixing 40-50% of short-chain alcohol, 35-50% of long-chain amine, 0-10% of long-chain alcohol, 0-5% of long-chain ester, 2-5% of long-chain sulfonic group, 0-2% of alkane, 0-2% of chloroalkane and 0-1% of aromatic hydrocarbon according to the mass ratio of 1: 2-4 with deionized water.
In the step (2), the ultrasonic frequency is the combined ultrasonic treatment of two frequencies of four frequencies of 40KHz, 80KHz, 120KHz and 170 KHz.
In the step (2), the ultrasonic frequency is combined ultrasonic treatment of 40KHz and 120 KHz; the ultrasonic frequency is 40KHz, the ultrasonic treatment time is 1-20min, the ultrasonic frequency is 120KHz, and the ultrasonic treatment time is 1-20 min.
In the step (2), the ultrasonic frequency is combined ultrasonic treatment of 80KHz and 170 KHz; the ultrasonic frequency is 80KHz, the ultrasonic treatment time is 1-20min, the ultrasonic frequency is 170KHz, and the ultrasonic treatment time is 1-20 min.
In the step (4), the volatile dehydration solvent is alcohol with the concentration of 99%.
The radar electronic component to be cleaned is clamped and fixed on the cleaning clamp 1, and the opening cavity is downward; and (4) when the rinsing is carried out by reverse spray in the step (3), the pure water is sprayed and cleaned from the lower part upwards in a reverse direction, and the cleaned pure water does not stay in the component for a long time to form secondary pollution.
In the step (1), the arrangement distance between adjacent radar electronic components to be cleaned is 0.5cm-20 cm.
A belt cleaning device for being directed at scaling powder on the radar electronic component carries out environmental protection abluent includes cleaning jig 1, conveyer belt 2, soaks supersound jet cleaning mechanism 3, reverse spray rinsing mechanism 4, solvent dehydration tympanic bulla mechanism 5, stoving mechanism 6, material loading platform 7 and unloading platform 8, moving mechanism 9 and lifting hook 10.
The cleaning clamp 1 comprises a clamp body and a fixed hanging frame 12; the clamp body is of a cylindrical structure with an open top and an open bottom, and the more than one fixed hanging rack 12 is movably positioned in the clamp body; the fixed hanging rack 12 comprises more than one pair of fixed spring leaves 122, the top of each pair of fixed spring leaves 122 is fixedly connected with a fixed end rod 121, and two ends of the pair of fixed end rods 121 are respectively arranged on the clamp body through sliding fixed blocks 11, so that the fixed hanging rack 12 can move in the clamp body; the lower part of each pair of fixed reeds 122 is a funnel-shaped opening end; when in use, a piece to be cleaned with a deep cavity is reversely buckled at the opening end of each pair of fixed reeds 122;
the soaking ultrasonic jet flow cleaning mechanism 3 comprises a cleaning box 31, a jet flow mechanism 34 and an ultrasonic generator 39; a pair of cleaning box brackets 33 is arranged in the cleaning box 31; the jet flow mechanism 34 is positioned in the cleaning box 31 below the pair of cleaning box brackets 33, the jet flow mechanism 34 comprises more than one horizontally arranged spray pipe 36, and the upper part and two sides of each spray pipe 36 are uniformly provided with spray holes 37; more than one jet pipe 36 is respectively connected with the jet pump 35 through connecting pipes; the ultrasonic generator 39 is positioned at the bottom outer side of the cleaning box 31; during cleaning, the cleaning clamp 1 is matched and positioned on the pair of cleaning box brackets 33, the jet flow mechanism and the ultrasonic generator 39 work simultaneously, and the jet flow mechanism sprays upwards for cleaning;
the reverse spray rinsing mechanism 4 comprises a reverse spray box 41 and a reverse spray mechanism; a pair of clamp brackets 42 is arranged in the reverse spraying box 41; the reverse spraying mechanism is positioned in a reverse spraying box 41 below the pair of clamp brackets 42; the reverse spraying mechanism comprises more than one reverse spraying pipe 43 which is horizontally arranged, and spraying holes are uniformly distributed at the upper part and two sides of the reverse spraying pipe 43; more than one reverse spray pipes 43 are respectively connected with a high-pressure pump 45 through connecting pipes; when the reverse spray rinsing is carried out, the cleaning fixture 1 is matched and positioned on the pair of fixture supports 42, and the reverse spray mechanism sprays upward for rinsing;
the solvent dehydration bubbling mechanism 5 comprises a dehydration box 51 and a bubbling mechanism, wherein a pair of dehydration supports 52 is arranged in the dehydration box 51; the bubbling mechanism is positioned in the dewatering box 51 below the pair of dewatering brackets 52; the bubbling mechanism comprises a bubbler 53, and the bubbler 53 is connected with a compression pump 54 positioned outside the dewatering box 51 through a pipeline; during dehydration, the cleaning clamp 1 is matched and positioned on a pair of drying and dehydrating brackets 52; the bubbler 53 performs bubbling operation;
the hot air drying mechanism 6 comprises a drying box 61 and a heating mechanism, a pair of drying supports 62 is arranged in the drying box 61, and the heating mechanism is positioned in the drying box 61 below the pair of drying supports 62; the heating mechanism comprises more than one hot air pipe 63, an electric heating wire 641 and a drying compression pump 651, the electric heating wire 641 is positioned in the hot air pipe 63, air outlet holes are uniformly distributed in the hot air pipe 63, and one end of the hot air pipe 63 is communicated with an air outlet of the drying compression pump 651; when the hot air is dried, the cleaning fixture 1 is matched and positioned on the pair of drying supports 62, and the heating mechanism upwards supplies hot air.
The beneficial technical effects of the invention are embodied in the following aspects:
1. the invention adopts a water-based environment-friendly cleaning method to carry out batch automatic cleaning on the radar electronic components with good consistency, the cleaning effect is good, the concentration of ionic pollutants of the cleaned radar electronic components is less than 1.56 microgram \ square centimeter equivalent of sodium chloride, and the total amount of flux residues is less than 40 microgram \ square centimeter, thereby meeting the requirement of the highest cleanliness grade of GJB 5807-2006.
2. The ultrasonic frequency set by the ultrasonic treatment method is one or two frequencies of 40KHz, 80KHz, 120KHz and 170KHz, and the ultrasonic treatment time is 1-40 min; the time is short and the efficiency is high.
3. Clamping and fixing the radar electronic component to be cleaned on a cleaning clamp in a state that the opening of the cavity faces downwards; and (4) during reverse spray rinsing in the step (3), pure water is reversely sprayed and cleaned from the lower part upwards, the cleaned pure water does not stay in the component for a long time and naturally drips and does not return to the component, the radar electronic component is prevented from being secondarily polluted by pollutants remained in rinsing liquid, and the efficient rinsing effect is realized.
4. The operation steps of solvent dehydration and bubbling adopt a bubbling rinsing mode of alcohol or other volatile alcohol solutions to realize the dehydration of the radar electronic component, and simultaneously realize the purpose of secondary rinsing, so that two functions of dehydration before rinsing and drying can be realized, the rinsing effect is enhanced, the residue of pollutants such as soldering flux and the like is further reduced, and the drying efficiency of a subsequent unit is greatly increased.
5. In the hot air drying operation step, the radar electronic component to be dried is clamped and fixed on a cleaning fixture, and the opening of the cavity faces downwards; the dry hot air is reversely sprayed upwards to take away residual bubbling volatile alcohol and residual trace water in the component.
Drawings
FIG. 1 is a schematic view of the structure of the cleaning apparatus of the present invention.
Fig. 2 is a schematic structural view of the clamp body and the hook.
Fig. 3 is a sectional view a-a of fig. 2.
Fig. 4 is a sectional view of fig. 3.
FIG. 5 is a schematic view of the structure of the soaking ultrasonic jet cleaning mechanism.
Fig. 6 is a schematic structural view of a back spray rinsing mechanism.
Fig. 7 is a structural schematic diagram of a solvent dehydration bubbling mechanism.
Fig. 8 is a schematic structural view of a hot air drying mechanism.
FIG. 9 is a schematic perspective view of the cleaning apparatus of the present invention.
Sequence numbers in the upper figure: the cleaning device comprises a cleaning clamp 1, a conveyor belt 2, a soaking ultrasonic jet cleaning mechanism 3, a reverse spray rinsing mechanism 4, a solvent dehydration bubbling mechanism 5, a drying mechanism 6, a feeding table 7, a discharging table 8, a moving mechanism 9, a lifting hook 10, a sliding fixed block 11, a fixed hanging frame 12, a fixed end rod 121, a spring piece 122, a piece 123 to be cleaned, a cleaning box 31, a cleaning liquid 32, a cleaning box support 33, a jet mechanism 34, a jet pump 35, a jet pipe 36, a jet hole 37, an ultrasonic generator 39, a reverse spray box 41, a clamp support 42, a reverse spray pipe 43, a water outlet 44, a high-pressure pump 45, a dewatering box 51, a dewatering support 52, a bubbler 53, a pressure air pump 54, a drying box 61, a drying support 62, a hot air pipe 63, an electric heating wire 641 and a drying air pump 651.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
Referring to fig. 1 and 9, the cleaning device comprises a cleaning clamp 1, a conveyor belt 2, a soaking ultrasonic jet cleaning mechanism 3, a reverse spray rinsing mechanism 4, a solvent dehydration bubbling mechanism 5, a drying mechanism 6, a feeding table 7, a discharging table 8, a moving mechanism 9 and a lifting hook 10.
The cleaning object is a radar electronic component of the relevant connector after welding.
The water-based environment-friendly cleaning operation of the soldering flux generated in the welding process of the radar electronic component comprises the following steps:
(1) clamping radar electronic component to be cleaned
Clamping and fixing 100 certain radar electronic components A to be cleaned on a cleaning clamp 1, and sending the radar electronic components A to a feeding table 7;
the arrangement distance between adjacent radar electronic components to be cleaned is 5 cm.
(2) Immersion ultrasonic jet cleaning
The moving mechanism 9 sends the radar electronic component to be cleaned on the feeding table 7 into the soaking cleaning liquid of the soaking ultrasonic jet flow cleaning mechanism 3 through the cleaning fixture 1 for soaking ultrasonic jet flow cleaning;
the soaking cleaning solution is prepared by uniformly mixing 45% of ethanol, 35% of octadecyl trimethyl ammonium chloride, 10% of lauryl alcohol, 5% of ethyl acetate and 5% of lauryl sodium sulfate according to the mass ratio of 1: 3; soaking for 8min, and performing ultrasonic treatment with ultrasonic frequency of 40KHz and ultrasonic treatment time of 10 min. And (4) after the ultrasonic treatment is finished, carrying out jet cleaning for 20 min.
(3) Rinsing by reverse spray
The moving mechanism 9 sends the radar electronic component to be cleaned after being soaked and cleaned by ultrasonic jet flow into the deionized water of the reverse spray rinsing mechanism 4 for reverse spray rinsing through the cleaning clamp 1; the back spray rinsing time was 20 min.
(4) Solvent dehydration bubbling
The moving mechanism 9 sends the radar electronic component subjected to the back spray rinsing into alcohol with the concentration of 99% of that of the solvent dehydration bubbling mechanism through the cleaning clamp 1 to carry out solvent dehydration bubbling treatment; the treatment time is 2 min.
(5) Drying by baking
The moving mechanism 9 feeds the radar electronic component subjected to solvent dehydration and bubbling into the drying mechanism through the cleaning fixture 1; drying with hot air at 60 deg.C for 10 min;
and the moving mechanism 9 sends the dried radar electronic component into the blanking table 8 through the cleaning clamp 1 to finish cleaning.
The concentration of ionic pollutants of the cleaned radar electronic component is less than 1.56 micrograms \ square centimeter equivalent of sodium chloride, and the total amount of flux residues is less than 40 micrograms \ square centimeter, so that the requirement of the highest cleanliness grade of GJB5807-2006 is met.
Example 2
Referring to fig. 1 and 9, the cleaning device comprises a cleaning clamp 1, a conveyor belt 2, a soaking ultrasonic jet cleaning mechanism 3, a reverse spray rinsing mechanism 4, a solvent dehydration bubbling mechanism 5, a drying mechanism 6, a feeding table 7, a discharging table 8, a moving mechanism 9 and a lifting hook 10.
The cleaning object is a radar electronic component of the relevant connector after welding.
The water-based environment-friendly cleaning operation of the soldering flux generated in the welding process of the radar electronic component comprises the following steps:
(1) clamping radar electronic component to be cleaned
Clamping and fixing 10 certain radar electronic components B to be cleaned on a cleaning clamp 1, and feeding the radar electronic components B to a feeding table 7;
the arrangement distance between adjacent radar electronic components to be cleaned is 10 cm.
(2) Immersion ultrasonic jet cleaning
The moving mechanism 2 sends the radar electronic component to be cleaned on the feeding table 7 into the soaking cleaning liquid of the soaking ultrasonic jet flow cleaning mechanism 3 through the cleaning clamp 1 to carry out soaking ultrasonic jet flow cleaning;
the soaking cleaning solution is prepared by uniformly mixing 50% of ethanol, 45% of hexadecyl tertiary amine, 2% of sodium dodecyl benzene sulfonate, 2% of n-hexane and 1% of benzoic acid according to the mass ratio of 1: 4 with deionized water; soaking for 8min, and performing ultrasonic treatment with ultrasonic frequency of 40KHz and ultrasonic treatment time of 10 min. And after the ultrasonic treatment is finished, jet cleaning is carried out for 30 min.
(3) Rinsing by reverse spray
The moving mechanism 2 sends the radar electronic component to be cleaned after being soaked and cleaned by ultrasonic jet flow into deionized water of the reverse spray rinsing mechanism 4 for reverse spray rinsing through the cleaning clamp 1; the back spray rinsing time was 30 min.
(4) Solvent dehydration bubbling
The moving mechanism 2 sends the radar electronic component subjected to the back spray rinsing into alcohol with the concentration of 99% of that of the solvent dehydration bubbling mechanism through the cleaning clamp 1 for solvent dehydration bubbling treatment; the treatment time is 5 min.
(5) Drying by baking
The moving mechanism 2 sends the radar electronic component subjected to solvent dehydration and bubbling into the drying mechanism through the cleaning fixture 1; drying with hot air at 60 deg.C for 20 min;
and the moving mechanism 2 sends the dried radar electronic component into the blanking table 8 through the cleaning clamp 1 to finish cleaning.
The concentration of ionic pollutants of the cleaned radar electronic component is less than 1.56 micrograms \ square centimeter equivalent of sodium chloride, and the total amount of flux residues is less than 40 micrograms \ square centimeter, so that the requirement of the highest cleanliness grade of GJB5807-2006 is met.
Example 3
Referring to fig. 1 and 9, the cleaning device comprises a cleaning clamp 1, a conveyor belt 2, a soaking ultrasonic jet cleaning mechanism 3, a reverse spray rinsing mechanism 4, a solvent dehydration bubbling mechanism 5, a drying mechanism 6, a feeding table 7, a discharging table 8, a moving mechanism 9 and a lifting hook 10.
The cleaning object is a radar electronic component of the relevant connector after welding.
The water-based environment-friendly cleaning operation of the soldering flux generated in the welding process of the radar electronic component comprises the following steps:
(1) clamping radar electronic component to be cleaned
Clamping and fixing 25 certain radar electronic components C to be cleaned on a cleaning clamp 1, and sending the radar electronic components C to a feeding table 7;
the arrangement distance between adjacent radar electronic components to be cleaned is 8 cm.
(2) Immersion ultrasonic jet cleaning
The moving mechanism 2 sends the radar electronic component to be cleaned on the feeding table 7 into the soaking cleaning liquid of the soaking ultrasonic jet flow cleaning mechanism 3 through the cleaning clamp 1 to carry out soaking ultrasonic jet flow cleaning;
the soaking cleaning solution is prepared by uniformly mixing 40% of isopropanol, 50% of octadecyl tertiary amine, 5% of long-chain alcohol, 2% of sodium dodecyl sulfate, 2% of chloropropane, 1% of benzoic acid and deionized water according to the mass ratio of 1: 2; soaking for 15min, and performing ultrasonic treatment with ultrasonic frequency of 170KHz and ultrasonic treatment time of 8 min. And (4) after the ultrasonic treatment is finished, carrying out jet cleaning for 20 min.
(3) Rinsing by reverse spray
The moving mechanism 2 sends the radar electronic component to be cleaned after being soaked and cleaned by ultrasonic jet flow into deionized water of the reverse spray rinsing mechanism 4 for reverse spray rinsing through the cleaning clamp 1; the back spray rinsing time was 25 min.
(4) Solvent dehydration bubbling
The moving mechanism 2 sends the radar electronic component subjected to the back spray rinsing into alcohol with the concentration of 99% of that of the solvent dehydration bubbling mechanism through the cleaning clamp 1 for solvent dehydration bubbling treatment; the treatment time is 3 min.
(5) Drying by baking
The moving mechanism 2 sends the radar electronic component subjected to solvent dehydration and bubbling into the drying mechanism through the cleaning fixture 1; drying with hot air at 55 deg.C for 25 min;
and the moving mechanism 2 sends the dried radar electronic component into the blanking table 8 through the cleaning clamp 1 to finish cleaning.
The concentration of ionic pollutants of the cleaned radar electronic component is less than 1.56 micrograms \ square centimeter equivalent of sodium chloride, and the total amount of flux residues is less than 40 micrograms \ square centimeter, so that the requirement of the highest cleanliness grade of GJB5807-2006 is met.
Example 4
Referring to fig. 1 and 9, the cleaning device for environmentally cleaning the soldering flux on the radar electronic component comprises a cleaning fixture 1, a conveyor belt 2, a soaking ultrasonic jet cleaning mechanism 3, a reverse spray rinsing mechanism 4, a solvent dehydration bubbling mechanism 5, a drying mechanism 6, a feeding table 7, a discharging table 8, a moving mechanism 9 and a lifting hook 10.
Referring to fig. 2, the washing jig 1 includes a jig body and a fixing hanger 12. The clamp body is a cylindrical structure with an open top and an open bottom, and referring to fig. 3, two fixed hangers 12 are movably arranged in the clamp body; referring to fig. 4, the fixed hanger 12 includes more than one pair of fixed spring leaves 122, the top of each pair of fixed spring leaves 122 is fixedly connected to a fixed end rod 121, and both ends of the pair of fixed end rods 121 are respectively mounted on the fixture body through the sliding fixed block 11, so that the fixed hanger 12 realizes a moving position in the fixture body. The lower part of each pair of fixed reeds 122 is a funnel-shaped opening end; in use, a member to be cleaned having a deep cavity is inverted over the open end of each pair of anchor blades 122.
Referring to fig. 5, the soaking ultrasonic jet cleaning mechanism 3 includes a cleaning tank 31, a jet mechanism 34, and an ultrasonic generator 39; a pair of cleaning tank holders 33 are mounted in the cleaning tank 31, and a jet flow mechanism 34 is provided in the cleaning tank 31 below the pair of cleaning tank holders 33. The jet flow mechanism 34 comprises more than one horizontally arranged jet pipe 36, and the upper part and two sides of each jet pipe 36 are uniformly provided with jet holes 37; the more than one jet pipes 36 are connected to the jet pump 35 through connecting pipes, respectively. The ultrasonic generator 39 is installed outside the bottom of the cleaning box 31; when cleaning, the cleaning jig 1 is fitted on the pair of cleaning tank holders 33, the jet flow mechanism and the ultrasonic generator 39 are operated simultaneously, and the jet flow mechanism is ejected upward for cleaning.
Referring to fig. 6, the back spray rinsing mechanism 4 includes a back spray tank 41 and a back spray mechanism. A pair of jig brackets 42 is installed in the back spray tank 41, and a back spray mechanism is located in the back spray tank 41 below the pair of jig brackets 42. The reverse spraying mechanism comprises more than one reverse spraying pipe 43 which is horizontally arranged, and spraying holes are uniformly distributed at the upper part and two sides of the reverse spraying pipe 43; the one or more reverse shower pipes 43 are connected to a high-pressure pump 45 through connection pipes, respectively. During the back spray rinsing, the cleaning jig 1 is fitted on the pair of jig supports 42, and the back spray mechanism sprays rinsing upward.
Referring to fig. 7, the solvent dehydration bubbling mechanism 5 includes a dehydration tank 51 and a bubbling mechanism. A pair of dehydration brackets 52 are installed in the dehydration tank 51, and the bubbling mechanism is located in the dehydration tank 51 below the pair of dehydration brackets 52. The bubbling mechanism includes a bubbler 53, and the bubbler 53 is connected to a compression pump 54 located outside the dehydration tank 51 through a pipe. During dehydration, the cleaning jig 1 is fitted on a pair of drying and dehydrating supports 52, and the bubbler 53 performs bubbling operation.
Referring to fig. 8, the hot air drying mechanism 6 includes a drying box 61 and a heating mechanism. A pair of drying supports 62 is installed in the drying box 61, and the heating mechanism is located in the drying box 61 below the pair of drying supports 62. The heating mechanism comprises more than one hot air pipe 63, an electric heating wire 641 and a drying air compression pump 651, wherein the electric heating wire 641 is positioned in the hot air pipe 63, air outlets are uniformly distributed on the hot air pipe 63, and one end of the hot air pipe 63 is communicated with an air outlet of the drying air compression pump 651. When the hot air is dried, the cleaning fixture 1 is matched and positioned on the pair of drying supports 62, and the heating mechanism upwards supplies hot air.
Claims (1)
1. A water-based environment-friendly cleaning method for soldering flux on a radar electronic component is characterized in that a cleaning object is a radar electronic component provided with a ceramic substrate and a related connector which are subjected to welding; the cleaning device comprises a cleaning clamp (1), a conveyor belt (2), a soaking ultrasonic jet flow cleaning mechanism (3), a reverse spray rinsing mechanism (4), a solvent dehydration bubbling mechanism (5), a hot air drying mechanism (6), a feeding table (7), a discharging table (8) and a moving mechanism (9); the method is characterized in that:
the cleaning clamp (1) comprises a clamp body and a fixed hanging rack (12); the clamp body is of a cylindrical structure with an open top and an open bottom, and the more than one fixed hanging rack (12) is movably positioned in the clamp body; the fixed hanging rack (12) comprises more than one pair of fixed reeds (122), the top of each pair of fixed reeds (122) is fixedly connected with a fixed end rod (121), and two ends of each pair of fixed end rods (121) are respectively arranged on the clamp body through sliding fixed blocks (11), so that the fixed hanging rack (12) can move in the clamp body; the lower part of each pair of fixed reeds (122) is a funnel-shaped opening end; when in use, a piece to be cleaned with a deep cavity is reversely buckled at the opening end of each pair of fixed reeds (122);
the soaking ultrasonic jet flow cleaning mechanism (3) comprises a cleaning box (31), a jet flow mechanism (34) and an ultrasonic generator (39); a pair of cleaning box brackets (33) is arranged in the cleaning box (31); the jet flow mechanism (34) is positioned in the cleaning box (31) below the pair of cleaning box supports (33), the jet flow mechanism (34) comprises more than one horizontally arranged spray pipe (36), and spray holes (37) are uniformly formed in the upper part and two sides of each spray pipe (36); more than one jet pipe (36) is respectively connected with a jet pump (35) through connecting pipes; the ultrasonic generator (39) is positioned outside the bottom of the cleaning box (31); during cleaning, the cleaning clamp (1) is matched and positioned on a pair of cleaning box brackets (33), the jet flow mechanism and the ultrasonic generator (39) work simultaneously, and the jet flow mechanism sprays upwards for cleaning;
the reverse spray rinsing mechanism (4) comprises a reverse spray box (41) and a reverse spray mechanism; a pair of clamp brackets (42) is arranged in the reverse spraying box (41); the reverse spraying mechanism is positioned in a reverse spraying box (41) below the pair of clamp brackets (42); the reverse spraying mechanism comprises more than one reverse spraying pipe (43) which is horizontally arranged, and spraying holes are uniformly distributed at the upper part and two sides of each reverse spraying pipe (43); more than one reverse spray pipes (43) are respectively connected with a high-pressure pump (45) through connecting pipes; when the reverse spray rinsing is carried out, the cleaning fixture (1) is matched and positioned on the pair of fixture supports (42), and the reverse spray mechanism sprays upward for rinsing;
the solvent dehydration bubbling mechanism (5) comprises a dehydration box (51) and a bubbling mechanism, wherein a pair of dehydration supports (52) is arranged in the dehydration box (51); the bubbling mechanism is positioned in a dewatering box (51) below the pair of dewatering brackets (52); the bubbling mechanism comprises a bubbler (53), and the bubbler (53) is connected with a compression pump (54) positioned outside the dewatering box (51) through a pipeline; when the dewatering work is carried out, the cleaning clamp (1) is matched and positioned on a pair of dewatering brackets (52); a bubbler (53) for bubbling operation;
the hot air drying mechanism (6) comprises a drying box (61) and a heating mechanism, a pair of drying supports (62) is arranged in the drying box (61), and the heating mechanism is positioned in the drying box (61) below the pair of drying supports (62); the heating mechanism comprises more than one hot air pipe (63), electric heating wires (641) and a drying air compression pump (651), the electric heating wires (641) are positioned in the hot air pipes (63), air outlet holes are uniformly distributed in the hot air pipes (63), and one end of each hot air pipe (63) is communicated with an air outlet of the drying air compression pump (651); when the hot air is dried, the cleaning clamp (1) is matched and positioned on the pair of drying supports (62), and the heating mechanism upwards supplies hot air;
the cleaning operation steps are as follows:
(1) clamping radar electronic component to be cleaned
Clamping and fixing the radar electronic components to be cleaned on a cleaning clamp (1), wherein the arrangement distance between every two adjacent radar electronic components to be cleaned is 0.5cm-20 cm;
(2) immersion ultrasonic jet cleaning
Sending the radar electronic component to be cleaned into a soaking cleaning solution of a soaking ultrasonic jet flow cleaning mechanism (3) through a cleaning clamp (1) for soaking ultrasonic jet flow cleaning; the soaking cleaning solution is prepared by uniformly mixing 40-50% of short-chain alcohol, 35-50% of long-chain amine, 0-10% of long-chain alcohol, 0-5% of long-chain ester, 2-5% of long-chain sulfonic group, 0-2% of alkane, 0-2% of chloralkane and 0-1% of aromatic hydrocarbon according to the mass ratio of 1: 2-4 with deionized water;
soaking for 5-20 min, and then carrying out ultrasonic treatment, wherein the ultrasonic frequency is 40KHz, 80KHz, 120KHz or 170KHz, and the ultrasonic treatment time is 1-40 min; (ii) combined sonication of two of the four frequencies;
(3) rinsing by reverse spray
Sending the radar electronic component to be cleaned after being soaked and cleaned by ultrasonic jet flow into pure water of a reverse spray rinsing mechanism (4) for reverse spray rinsing through a cleaning clamp (1); the pure water is deionized water, and the reverse spray rinsing time is 3-120 min;
the radar electronic component to be cleaned is clamped and fixed on the cleaning clamp (1) in a state that the opening cavity is downward; when the back spray rinsing is carried out, the pure water is sprayed and cleaned from the lower part to the upper part in the opposite direction, and the cleaned pure water does not stay in the component for a long time to form secondary pollution;
(4) solvent dehydration bubbling
Sending the radar electronic component subjected to the back spray rinsing into a dehydration solvent of a solvent dehydration bubbling mechanism through a cleaning clamp (1) for solvent dehydration bubbling treatment;
the dehydration solvent is alcohol with the concentration of 99%, and the treatment time is 0.5-20 min;
(5) drying by baking
The radar electronic component after the solvent is dehydrated and bubbled is sent to a hot air drying mechanism through a cleaning clamp (1); drying by hot air at 40-120 ℃ for 5-60 min;
the dried radar electronic component is sent to a blanking table (8) through a cleaning clamp (1) to complete cleaning;
the concentration of ionic pollutants of the cleaned radar electronic component is less than 1.56 micrograms/square centimeter equivalent of sodium chloride, and the total amount of flux residues is less than 40 micrograms/square centimeter, so that the requirement of the highest cleanliness grade of GJB5807-2006 is met.
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| CN201710753918.7A CN107413760B (en) | 2017-08-29 | 2017-08-29 | Water-based environment-friendly cleaning method and cleaning device for soldering flux on radar electronic component |
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| CN109226058A (en) * | 2018-10-16 | 2019-01-18 | 天津普恒康泰科技有限公司 | Drug residue solvent cleaning equipment |
| CN111112166B (en) * | 2020-01-02 | 2022-01-14 | 惠州市连盟铝基电子有限公司 | A spray degreasing device for plastic-aluminum plate processing |
| CN113611592A (en) * | 2021-07-30 | 2021-11-05 | 成都先进功率半导体股份有限公司 | Method for cleaning chip product to be wire-bonded and packaged |
| CN114951095B (en) * | 2022-04-11 | 2023-04-18 | 中国电子科技集团公司第三十八研究所 | Automatic cleaning method for digital array module |
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| JP2002028599A (en) * | 2000-07-19 | 2002-01-29 | Seiko Epson Corp | Method for cleaning reused part |
| CN101695696B (en) * | 2009-09-23 | 2011-08-24 | 镇江市港南电子有限公司 | Method for cleaning silicon chip |
| CN201644436U (en) * | 2010-03-09 | 2010-11-24 | 深圳市合明科技有限公司 | Ultrasonic cleaning machine |
| CN105195465B (en) * | 2015-09-21 | 2017-07-18 | 同济大学 | A kind of ultrasonic wave mega sonic wave combination frequency full-automatic optical element cleaning device |
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