CN102744478B - A kind of manufacturing process of composite heat exchanger - Google Patents
A kind of manufacturing process of composite heat exchanger Download PDFInfo
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- CN102744478B CN102744478B CN201210267710.1A CN201210267710A CN102744478B CN 102744478 B CN102744478 B CN 102744478B CN 201210267710 A CN201210267710 A CN 201210267710A CN 102744478 B CN102744478 B CN 102744478B
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Abstract
The invention discloses a kind of manufacturing process of composite heat exchanger.Its processing step comprises the degreasing of piece surface successively, the assembling of part, the preparation of brazing flux suspension, the spray of brazing flux suspension, the air of brazing flux blow off, the drying of brazing flux, the heating of brazing flux, the cooling of part, the inspection of part, the drying of part.Advantage of the present invention is: use Kace Flux as brazing flux raw material, raw material is inertia, corrosion-free, has allow clearance and good gap-filling properties significantly, does not need to remove soldering residue, remove oxide-film very competent after soldering; Use each step of PLC Controlling Technology, be easy to operation and control; Use the mode process brazing flux of spray, part each position brazing flux is distributed uniformly, and the brazing flux that drops can recycle, and avoids waste, economize energy, reduces costs; Utilize the temperature of the temperature sensor feedback thermal treatment zone in heating process, the time utilizing PLC to control timely and effectively to heat and temperature, improve the quality of soldering.
Description
Technical field
The present invention relates to a kind of manufacturing process of composite heat exchanger, particularly relate to a kind of manufacturing process being applied to the composite heat exchanger of automotive air conditioning device.
Background technology
Along with the progress of science and technology and the raising of people's living standard, automobile progressively becomes the general walking-replacing tool of people.Automotive air-conditioning system realizes freezing to air in a car compartment, heats, takes a breath and the device of purification of air, it can provide comfortable environment by bus for rider person, reduce the fatigue strength of driver, improve traffic safety, aircondition has become weighs one of whether complete mark of automobile function.Composite heat exchanger is as the critical elements of air conditioning for automobiles, and its optimization can reduce the energy use amount of automobile, improves the service efficiency of the energy, and reduce discharge, the protection for the energy and environment also has very important effect.
Soldering refer to than the low-melting metal material of mother metal as solder, soak mother metal with liquid solder and fill workpiece interface gaps and the welding method making it with the counterdiffusion of mother metal phase.Brazing deformation is little, joint smooth and beautiful appearance, is suitable for welding component that is accurate, complicated and that be made up of different materials, as honeycomb panel, turbine blade, hard alloy cutter and printed circuit board (PCB) etc.Careful processing and strict cleaning must be carried out to workpiece before soldering, except degreasing and blocked up oxide-film, ensure interface fit-up gap.Flux brazing flux does not react with Al and under melting (at least part of melting), only just has reactivity under room temperature and brazing temperature, dissolves the Al on Al surface after brazing flux melting
2o
3, wetting composition surface, reduces the surface tension of liquid solder, makes liquid solder utilize capillarity freely to flow into composition surface, and prevent surface to be again oxidized.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of manufacturing process of composite heat exchanger is provided.
Composite heat exchanger manufacturing process, is characterized in that it comprises the following steps:
1) cleaning of organic solvent (trichloroethanes or trichloro-ethylene) steam purge, aqueous cleaning agent or alkali cleaning is adopted, for improving the wetability of brazing flux suspension, improve the corrosion resistance of braze ability and product, in suspension, add the surfactant (NCH) of 0.1%;
2) ensure the joint gap after Assembly of the parts, fin and flat tube, adopt blind-mate, the skin material of clad aluminum foil serves as gap, and rely on Dimension Measurement to ensure the joint clearance of brazing at other position, joint clearance of brazing is no more than 0.1mm, general clamp after assembling, clamping force is moderate;
3) utilize mixer that distilled water and Kace Flux are mixed with suspension, the surperficial brazing flux amount of being loaded with 4 ~ 6g/m
2, spray brazing flux suspension concentration is 5 ~ 10%, and for important brazed seams such as the brazed seams between flat tube and fin, utilizing artificial independent brush to sweep concentration is that the suspension of 30 ~ 50% is to guarantee brazing quality;
4) PLC is passed through, when workpiece is by spray district, open spraying electromagnetic valve, automatic spray, workpiece, after spray district, arranges two artificial stations, the important brazed seam such as the brazed seam between flat tube and fin, utilize artificial brush separately to sweep brazing flux suspension, occur gap after preventing heating, affect product quality;
5) workpiece is moved into front portion, the thermal treatment zone with guipure, and at this district's blower fan to workpiece up-draught, make unnecessary brazing flux blow off, the brazing flux blown off falls into water receiving tank and flow to brazing flux storage tank, recycles;
6) dry section temperature is set to 200-250 DEG C, drying time is set to 4-5 minute, hot air circulation mode is adopted time dry, use blower fan that inner air is circulated, wind speed is set to 2-3m/s, the air moisture of the moisture in removing brazing flux and surface of the work absorption, prevents workpiece from carrying air moisture pernicious gas and directly enters soldering oven high-temperature region, cause oxidation on metal surface;
7) soldering furnace body divides 5th district, resistive band heating cabinet mode is adopted to heat, every district is provided with upper and lower each one group of heating cabinet, resistive band material selection 2080 material, each soldering thermal treatment zone arranges upper and lower 2 points for measuring temperature, the change of the change furnace temperature of monitoring furnace temperature, each temperature control section temperature, welding parameter setting, measurement, FEEDBACK CONTROL and the production routines such as work transfer rate, adopt industrial control computer and PLC to realize;
8) workpiece from the thermal treatment zone out after, enter static cooling chamber, cooling chamber is single layer structure, and hot blast is extracted out from top by blower fan, and blower fan is frequency control, use thermal insulation board cooling chamber is isolated from the outside, both sides are provided with access door;
9) workman checks being cooled to the workpiece of normal temperature, if the phenomenons such as workpiece does not have rosin joint, gets loose, warpage occur, carries out next step, if workpiece goes wrong, carries out corresponding reprocessing according to corresponding problem;
10) carry out drying process to workpiece, further examining workpieces quality, packs after the assay was approved, and carries out final inspection, ensures product quality.
The change of described furnace temperature, each temperature control section temperature, welding parameter setting, measurement, FEEDBACK CONTROL and the production routines such as work transfer rate, adopt industrial control computer and PLC to realize.
Distilled water and Kace Flux are mixed with suspension, the surperficial brazing flux amount of being loaded with 4 ~ 6g/m by the described mixer that utilizes
2, spray brazing flux suspension concentration is 5 ~ 10%, and for important brazed seams such as the brazed seams between flat tube and fin, utilizing artificial independent brush to sweep concentration is that the suspension of 30 ~ 50% is to guarantee brazing quality.
Present invention process is compared with traditional handicraft, and its advantage is:
1) use Kace Flux as brazing flux raw material, raw material is inertia, corrosion-free, there is allow clearance and good gap-filling properties significantly, allow and carry out faulty cleaning, do not need after soldering to clean, do not need to remove soldering residue, remove oxide-film very competent, storage procedures is simple;
2) change of furnace temperature, each temperature control section temperature, welding parameter setting, measurement, FEEDBACK CONTROL and the production routines such as work transfer rate, adopt industrial control computer and PLC to realize, use each step of PLC Controlling Technology, be easy to operation, be convenient to control;
3) use the mode process brazing flux of spray, part each position brazing flux is distributed uniformly, the phenomenon avoiding local too much very few occurs, and the brazing flux that drops can recycle, and avoids waste, economize energy, reduces costs.
Accompanying drawing explanation
Fig. 1 is the manufacturing process flow diagram of composite heat exchanger;
Fig. 2 is the manufacturing equipment schematic diagram of composite heat exchanger.
Detailed description of the invention
The manufacturing process of dining-table support guide arm comprises the following steps:
1) cleaning of organic solvent (trichloroethanes or trichloro-ethylene) steam purge, aqueous cleaning agent or alkali cleaning is adopted, for improving the wetability of brazing flux suspension, improve the corrosion resistance of braze ability and product, in suspension, add the surfactant (NCH) of 0.1%;
2) ensure the joint gap after Assembly of the parts, fin and flat tube, adopt blind-mate, the skin material of clad aluminum foil serves as gap, and rely on Dimension Measurement to ensure the joint clearance of brazing at other position, joint clearance of brazing is no more than 0.1mm, general clamp after assembling, clamping force is moderate;
3) utilize mixer that distilled water and Kace Flux are mixed with suspension, the surperficial brazing flux amount of being loaded with 4 ~ 6g/m
2, spray brazing flux suspension concentration is 5 ~ 10%, and for important brazed seams such as the brazed seams between flat tube and fin, utilizing artificial independent brush to sweep concentration is that the suspension of 30 ~ 50% is to guarantee brazing quality;
4) PLC is passed through, when workpiece is by spray district, open spraying electromagnetic valve, automatic spray, workpiece, after spray district, arranges two artificial stations, the important brazed seam such as the brazed seam between flat tube and fin, utilize artificial brush separately to sweep brazing flux suspension, occur gap after preventing heating, affect product quality;
5) workpiece is moved into front portion, the thermal treatment zone with guipure, and at this district's blower fan to workpiece up-draught, make unnecessary brazing flux blow off, the brazing flux blown off falls into water receiving tank and flow to brazing flux storage tank, recycles;
6) dry section temperature is set to 200-250 DEG C, drying time is set to 4-5 minute, hot air circulation mode is adopted time dry, use blower fan that inner air is circulated, wind speed is set to 2-3m/s, the air moisture of the moisture in removing brazing flux and surface of the work absorption, prevents workpiece from carrying air moisture pernicious gas and directly enters soldering oven high-temperature region, cause oxidation on metal surface;
7) soldering furnace body divides 5th district, resistive band heating cabinet mode is adopted to heat, every district is provided with upper and lower each one group of heating cabinet, resistive band material selection 2080 material, each soldering thermal treatment zone arranges upper and lower 2 points for measuring temperature, the change of the change furnace temperature of monitoring furnace temperature, each temperature control section temperature, welding parameter setting, measurement, FEEDBACK CONTROL and the production routines such as work transfer rate, adopt industrial control computer and PLC to realize;
8) workpiece from the thermal treatment zone out after, enter static cooling chamber, cooling chamber is single layer structure, and hot blast is extracted out from top by blower fan, and blower fan is frequency control, use thermal insulation board cooling chamber is isolated from the outside, both sides are provided with access door;
9) workman checks being cooled to the workpiece of normal temperature, if the phenomenons such as workpiece does not have rosin joint, gets loose, warpage occur, carries out next step, if workpiece goes wrong, carries out corresponding reprocessing according to corresponding problem;
10) carry out drying process to workpiece, further examining workpieces quality, packs after the assay was approved, and carries out final inspection, ensures product quality.
The change of described furnace temperature, each temperature control section temperature, welding parameter setting, measurement, FEEDBACK CONTROL and the production routines such as work transfer rate, adopt industrial control computer and PLC to realize.
Distilled water and Kace Flux are mixed with suspension, the surperficial brazing flux amount of being loaded with 4 ~ 6g/m by the described mixer that utilizes
2, spray brazing flux suspension concentration is 5 ~ 10%, and for important brazed seams such as the brazed seams between flat tube and fin, utilizing artificial independent brush to sweep concentration is that the suspension of 30 ~ 50% is to guarantee brazing quality.
Claims (1)
1. a composite heat exchanger manufacturing process, is characterized in that it comprises the following steps:
1) adopt trichloroethanes or the cleaning of trichloro-ethylene organic solvent steam, aqueous cleaning agent cleaning or alkali cleaning, in suspension, add the NCH surfactant of 0.1%;
2) fit system of fin and flat tube adopts blind-mate, uses the skin material of clad aluminum foil to serve as gap, assembles rear clamp;
3) utilize mixer that distilled water and Kace Flux are mixed with suspension, the surperficial brazing flux amount of being loaded with 4 ~ 6g/m
2, spray brazing flux suspension concentration is 5 ~ 10%, for the brazed seam between flat tube and fin, utilizes artificial brush separately to sweep the suspension that concentration is 30 ~ 50%;
4) by PLC, when workpiece is by spray district, open spraying electromagnetic valve, automatic spray, workpiece, after spray district, arranges two artificial stations, the brazed seam between flat tube and fin, utilizes artificial brush separately to sweep brazing flux suspension;
5) workpiece is moved into front portion, the thermal treatment zone with guipure, and at this district's blower fan to workpiece up-draught, make unnecessary brazing flux blow off, the brazing flux blown off falls into water receiving tank and flow to brazing flux storage tank;
6) dry section temperature is set to 200-400 DEG C, heating power 100-120W, drying time is set to 4-5 minute, and adopt hot air circulation mode time dry, wind speed is set to 2-3m/s, the air moisture of the moisture in removing brazing flux and surface of the work absorption;
7) soldering furnace body divides 5th district, resistive band heating cabinet mode is adopted to heat, every district is provided with upper and lower each one group of heating cabinet, resistive band material selection 2080 material, each soldering thermal treatment zone arranges upper and lower 2 points for measuring temperature, the change of monitoring furnace temperature, each temperature control section temperature, the setting of work transfer rate welding parameter, measurement, FEEDBACK CONTROL and production routine, adopt industrial control computer and PLC to realize;
8) workpiece from the thermal treatment zone out after, enter static cooling chamber, cooling chamber is single layer structure, and hot blast is extracted out from top by blower fan, and blower fan is frequency control, use thermal insulation board cooling chamber is isolated from the outside, both sides are provided with access door;
9) workman checks being cooled to the workpiece of normal temperature, if workpiece does not have rosin joint, gets loose, warping phenomenon occurs, carries out next step, if workpiece goes wrong, carries out corresponding reprocessing according to corresponding problem;
10) carry out drying process to workpiece, further examining workpieces quality, packs after the assay was approved, and carries out final inspection, ensures product quality.
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| CN201210267710.1A CN102744478B (en) | 2012-07-30 | 2012-07-30 | A kind of manufacturing process of composite heat exchanger |
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| CN201210267710.1A CN102744478B (en) | 2012-07-30 | 2012-07-30 | A kind of manufacturing process of composite heat exchanger |
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| CN102744478A CN102744478A (en) | 2012-10-24 |
| CN102744478B true CN102744478B (en) | 2015-09-02 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974909B (en) * | 2012-12-04 | 2016-04-13 | 无锡方盛换热器制造有限公司 | High-pressure aluminum plate-fin heat exchanger method for welding |
| CN106216789A (en) * | 2016-08-24 | 2016-12-14 | 广西易德科技有限责任公司 | A kind of welding procedure of two-layer composite cooling water tank |
| CN112276276A (en) * | 2020-10-29 | 2021-01-29 | 豫新汽车热管理科技有限公司 | Treatment process method for oxidized automobile condenser |
| CN113290297B (en) * | 2021-05-27 | 2023-04-07 | 贵州永红航空机械有限责任公司 | Brazing filler metal assembling method for brazing high-temperature alloy honeycomb silencer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3971501A (en) * | 1975-04-09 | 1976-07-27 | Alcan Research And Development Limited | Method of brazing aluminum |
| DE10141883A1 (en) * | 2001-08-28 | 2003-03-20 | Behr Gmbh & Co | Flux compositions for brazing parts, in particular based on aluminum as a base material, and their use |
| CN1753753A (en) * | 2003-02-26 | 2006-03-29 | 贝洱两合公司 | Device and method for applying a flow agent for hard soldering of parts |
| CN201389704Y (en) * | 2009-03-30 | 2010-01-27 | 安徽华东光电技术研究所 | Automatic brazing control device for brazing furnace |
| CN102310244A (en) * | 2010-07-09 | 2012-01-11 | 上海德朗汽车零部件制造有限公司 | Brazing flux spray device of brazed radiator |
-
2012
- 2012-07-30 CN CN201210267710.1A patent/CN102744478B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3971501A (en) * | 1975-04-09 | 1976-07-27 | Alcan Research And Development Limited | Method of brazing aluminum |
| DE10141883A1 (en) * | 2001-08-28 | 2003-03-20 | Behr Gmbh & Co | Flux compositions for brazing parts, in particular based on aluminum as a base material, and their use |
| CN1753753A (en) * | 2003-02-26 | 2006-03-29 | 贝洱两合公司 | Device and method for applying a flow agent for hard soldering of parts |
| CN201389704Y (en) * | 2009-03-30 | 2010-01-27 | 安徽华东光电技术研究所 | Automatic brazing control device for brazing furnace |
| CN102310244A (en) * | 2010-07-09 | 2012-01-11 | 上海德朗汽车零部件制造有限公司 | Brazing flux spray device of brazed radiator |
Non-Patent Citations (1)
| Title |
|---|
| NOCOLOK 钎剂在氮气气氛中钎焊的工艺研究与应用;王超等;《焊接技术》;19981031(第5期);第14-15页 * |
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Denomination of invention: A manufacturing process of composite heat exchanger Effective date of registration: 20220707 Granted publication date: 20150902 Pledgee: Longquan Branch of China Construction Bank Co.,Ltd. Pledgor: ZHEJIANG CHUANGXIN AUTO AIR-CONDITIONER Co.,Ltd. Registration number: Y2022330001269 |
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