CN115319427A - Production process of steel-copper composite assembled heat exchanger - Google Patents
Production process of steel-copper composite assembled heat exchanger Download PDFInfo
- Publication number
- CN115319427A CN115319427A CN202211107640.3A CN202211107640A CN115319427A CN 115319427 A CN115319427 A CN 115319427A CN 202211107640 A CN202211107640 A CN 202211107640A CN 115319427 A CN115319427 A CN 115319427A
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- Prior art keywords
- heat exchange
- steel
- copper composite
- coil
- copper foil
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- 229910052802 copper Inorganic materials 0.000 title claims abstract description 35
- 239000010949 copper Substances 0.000 title claims abstract description 35
- 239000002131 composite material Substances 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000011889 copper foil Substances 0.000 claims abstract description 33
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 30
- 239000010935 stainless steel Substances 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000003466 welding Methods 0.000 claims abstract description 25
- 238000005219 brazing Methods 0.000 claims abstract description 21
- 238000005520 cutting process Methods 0.000 claims abstract description 11
- 238000004080 punching Methods 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000004320 controlled atmosphere Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 4
- 238000010008 shearing Methods 0.000 claims description 4
- 238000009966 trimming Methods 0.000 claims description 4
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 3
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000013329 compounding Methods 0.000 abstract description 3
- 238000012546 transfer Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/26—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers or the like
Abstract
The invention discloses a production process of a steel-copper composite assembled heat exchanger, which comprises the following steps: respectively unreeling the copper foil coil and the stainless steel coil through a conveying roller, and superposing the copper foil coil to the upper side of the stainless steel coil to form a steel-copper composite coiled material; then leveling and spot welding are carried out, so that the copper foil coil and the stainless steel coil are welded together; cutting the spot-welded steel-copper composite coiled material into heat exchange plates with corresponding specifications according to a specified size by using a cutting machine; the cut heat exchange plate sheets are subjected to continuous punch forming by using a press to obtain heat exchange plate sheets with corrugated surfaces, punching the heat exchange plate sheets, and stacking the heat exchange plate sheets to form a heat exchange plate group; finally, brazing to obtain a finished heat exchanger. According to the invention, the copper foil coil and the stainless steel coil are superposed and fed, and are leveled and spot-welded together, so that the labor intensity of frequent operation of workers is reduced, meanwhile, the positioning is convenient after superposition and compounding, the plate after blanking cannot fall off, the forming and punching are accurate, the product percent of pass is high, and the production efficiency is high.
Description
Technical Field
The invention belongs to the technical field of plate heat exchangers, and particularly relates to a production process of a steel-copper composite assembled heat exchanger.
Background
At present, in the production process of a brazed plate heat exchanger, a flow channel needs to be pressed on a plate by using a press, and then the plates are sequentially staggered, superposed and delivered from a factory; before pressing, copper foil serving as welding material is firstly compounded on stainless steel and then cut and pressed, and in order to avoid the separation phenomenon of the copper foil and the stainless steel plate in the subsequent process, the copper foil and the stainless steel plate need to be subjected to spot welding at the edge by using a spot welding machine, so that the subsequent separation is avoided. At present, in a conventional spot welding mode, a plate and a copper foil are manually and respectively superposed, then a pressing mechanism is additionally arranged, a spot welding machine is arranged on two sides of the pressing mechanism, and then spot welding is carried out, wherein the plate and the copper foil lack a synergistic effect, so that continuous feeding efficiency in manual operation is low; when the copper foil or the stainless steel is changed, the spot welding machine is removed, then the pressing mechanism is loosened to change the coil, and the copper foil or the stainless steel is pressed again after a new coil is changed, and the position of the spot welding machine is installed and adjusted, so that the operation efficiency is greatly influenced, and the productivity of an enterprise is not improved.
In addition, two types of problems often arise during press demolding: firstly, the material is adhered to the upper template, so that the material is not easy to fall off; secondly, the material is adhered in the die cavity of the lower die plate, so that the material cannot be smoothly taken; the flaking efficiency is greatly delayed no matter what way.
Therefore, a fully automatic sheet making process of the brazed plate heat exchanger, which can solve the problems, is needed.
Disclosure of Invention
In view of the above, the technical problem to be solved by the invention is to provide a production process of a steel-copper composite assembled heat exchanger, which is used for avoiding the troubles of low efficiency, inaccurate positioning and easy stripping caused by the fact that heat exchange plates and copper foils are continuously overlapped manually for composite spot welding in the past.
In order to solve the technical problem, the invention discloses a production process of a steel-copper composite assembled heat exchanger, which comprises the following steps:
step a: feeding, namely respectively unreeling the copper foil coil and the stainless steel coil through a conveying roller, and superposing the copper foil coil to the upper side of the stainless steel coil to form a steel-copper composite coiled material;
step b: leveling, namely conveying the steel-copper composite coiled material to a leveling machine for leveling, tensioning, and longitudinally shearing and trimming;
step c: spot welding, namely conveying the steel-copper composite coiled material to a medium frequency point welding machine, positioning the longitudinal edge of the steel-copper composite coiled material by using a module, and spot welding the steel-copper composite coiled material to weld the copper foil coil and the stainless steel coil together;
step d: blanking, cutting the spot-welded steel-copper composite coiled material into heat exchange plates with corresponding specifications according to specified dimensions by using a cutting machine;
step e: forming, namely performing continuous punch forming on the cut heat exchange plate by using a press to obtain the heat exchange plate with the corrugated surface;
step f: punching, namely continuously punching the formed heat exchange plate to form corner holes on the periphery, cutting mark grooves at the edge flanging position, and designing the mark grooves of the upper and lower adjacent heat exchange plates in a staggered manner;
step g: stacking, cleaning and drying, and then sequentially stacking and pressing the heat exchange plates to form a heat exchange plate group;
step h: and brazing, namely feeding the heat exchange plate group into a continuous controlled atmosphere brazing furnace or a vacuum brazing furnace for brazing to obtain a finished heat exchanger.
According to an embodiment of the present invention, the copper foil roll is selected from a copper foil coil of 0.035-0.05 mm.
According to an embodiment of the present invention, in the step f, two asymmetric small holes of 1mm are punched at the edge of one of the corner holes of one of the heat exchange plate sheets, the small holes are staggered with the corresponding corner holes of the adjacent heat exchange plate sheets, and the conducting medium enters the heat exchange pore channel.
According to an embodiment of the present invention, the corner hole where the small hole is located sinks, the corner hole where another adjacent heat exchange plate is located protrudes, and an outer diameter of the protruding corner hole is smaller than an outer diameter of the sinking small hole, so as to expose the small hole.
According to an embodiment of the present invention, the helium test is performed at 2-3MPa after the above step h.
According to an embodiment of the present invention, in the step h, the continuous controlled atmosphere brazing furnace or the vacuum brazing furnace comprises a heating system, a cooling system, a transmission system, a control system and a gas supply system; the furnace body adopts a refractory steel muffle furnace chamber; the electric heating element heats up and down; the mesh belt conveying is stepless and adjustable; the ammonia decomposed nitrogen-hydrogen mixed gas enters a hearth after being purified, so that the effect of protection against oxidation is achieved.
Compared with the prior art, the invention can obtain the following technical effects:
through overlapping the copper foil coil and the stainless steel coil for feeding, leveling and spot welding are performed in the lump, the labor intensity of frequent operation of workers is reduced, the positioning is convenient after the overlapping and compounding, the plate after the blanking cannot fall off, the forming and punching are accurate, the product percent of pass is high, and the production efficiency is high.
Of course, it is not necessary for any one product in which the invention is practiced to achieve all of the above-described technical effects simultaneously.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a production process flow chart of a steel-copper composite assembled heat exchanger with a reinforcing structure according to an embodiment of the invention.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, so that how to implement the technical means for solving the technical problems and achieving the technical effects of the present invention can be fully understood and implemented.
Referring to fig. 1, fig. 1 is a flow chart of a production process of a steel-copper composite assembled heat exchanger with a reinforcing structure according to an embodiment of the present invention.
As shown in the figure, the production process of the steel-copper composite assembled heat exchanger comprises the following steps:
step a: feeding, namely respectively unreeling the copper foil coil and the stainless steel coil through a conveying roller, and superposing the copper foil coil to the upper side of the stainless steel coil to form a steel-copper composite coiled material; wherein the copper foil coil is selected from a copper foil coiled material with the thickness of 0.035-0.05mm, and the stainless steel coil is selected from a stainless steel coiled material with the thickness of 2mm, and the method is applied to the production of the plate heat exchanger. In the concrete production process, the copper foil coil and the stainless steel coil are respectively installed on the coiling and conveying device, after the uncoiling is completed by one section of stroke, the copper foil coil and the stainless steel coil are overlapped together through the conveying belt, wherein the copper foil coil is overlapped to the upper side of the stainless steel coil, and the subsequent spot welding work is convenient.
Step b: leveling, namely conveying the steel-copper composite coiled material to a leveling machine for leveling, tensioning, longitudinally shearing and trimming; in the process, after the copper foil coil and the stainless steel coil are stacked, leveling, longitudinal shearing and trimming are needed, the copper foil coil and the stainless steel coil are kept flush when spot welding is convenient, and the product quality is guaranteed during subsequent brazing forming.
Step c: spot welding, carry the compound coiled material of steel copper to the medium frequency spot welding machine, utilize the longitudinal edge of the compound coiled material of module location steel copper, keep flushing, the compound coiled material of spot welding steel copper, interval spot welding makes copper foil coil and stainless steel coil welding together, fixed to an organic whole.
Step d: blanking, cutting the spot-welded steel-copper composite coiled material into heat exchange plates with corresponding specifications according to specified dimensions by using a cutting machine; at the moment, the heat exchange plate sheets are formed by welding the stainless steel plate sheets and the copper foil sheets together and cutting the stainless steel plate sheets and the copper foil sheets by a preset length, so that the stainless steel plate sheets are formed and discharged, and collected by workers and sent to the next processing procedure.
Step e: forming, namely performing continuous punch forming on the cut heat exchange plate by using a press to obtain the heat exchange plate with the corrugated surface; in this step, the corrugation is generally in a V shape, and is a ridge-shaped corrugation belt, which is used for facilitating the overlapping of the upper and lower heat exchange plate sheets to form a thin rectangular heat exchange pore channel.
Step f: punching, continuing to punch a hole to the heat transfer slab after the shaping, shaping goes out the angular hole all around for leading-in output heat transfer medium, connect the copper pipe joint, and cut at edge turn-ups and put the mark groove, mark groove can set up to little U-shaped, and the crisscross design of mark groove of upper and lower adjacent heat transfer slab is used for distinguishing, makes things convenient for the workman can discern different heat transfer slabs fast when stacking, improves operating efficiency.
Step g: stacking, cleaning and drying, and then sequentially stacking and pressing the heat exchange plates to form a heat exchange plate group; ensuring the stacking sequence to be accurate.
Step h: and brazing, namely feeding the heat exchange plate group into a continuous controlled atmosphere brazing furnace or a vacuum brazing furnace for brazing to obtain a finished heat exchanger, and brazing the front end plate and the rear end plate with the intermediate heat exchange plate in the same way.
In an embodiment of the present invention, in step f, two asymmetric small holes of 1mm are punched at the edge of one of the corner holes of one of the heat exchange plate sheets, and the small holes are staggered with the corresponding corner holes of the adjacent heat exchange plate sheets to conduct a medium into the heat exchange pore channels. Specifically, the corner hole where the small hole is located sinks, the corner hole where another adjacent heat exchange plate is located protrudes upwards, and the outer diameter of the protruding corner hole is smaller than that of the sinking small hole, so that the small hole is exposed. Through the angular hole of designing different structures on first slab of complex and second slab, it is sealed to offset the formation by the ring portion in two angular holes, and the medium carries out downward torrent through the water conservancy diversion hole of bared, gets into by the aperture, strengthens edge effect, and the circulation is strong, and heat exchange efficiency is high, and the product is reliable.
In a preferred embodiment, the helium test is performed at 2-3MPa after the step h, and the tightness and reliability of the product are ensured.
In addition, the continuous controlled atmosphere brazing furnace or the vacuum brazing furnace in the step h consists of a heating system, a cooling system, a transmission system, a control system and a gas supply system device; the furnace body adopts a heat-resistant steel muffle furnace chamber; the electric heating element heats up and down; the mesh belt conveying is stepless and adjustable; the ammonia decomposed nitrogen-hydrogen mixed gas enters the hearth after being purified, thereby achieving the effect of protecting against oxidation.
In conclusion, the copper foil coil and the stainless steel coil are superposed and fed, leveled and spot-welded together, so that the labor intensity of frequent operation of workers is reduced, the positioning is convenient after superposition and compounding, the plate after blanking cannot fall off, the forming and punching are accurate, the product yield is high, and the production efficiency is high.
The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A production process of a steel-copper composite assembled heat exchanger is characterized by comprising the following steps:
step a: feeding, namely respectively unreeling the copper foil coil and the stainless steel coil through a conveying roller, and superposing the copper foil coil to the upper side of the stainless steel coil to form a steel-copper composite coiled material;
step b: leveling, namely conveying the steel-copper composite coiled material to a leveling machine for leveling, tensioning, longitudinally shearing and trimming;
step c: spot welding, namely conveying the steel-copper composite coiled material to a medium frequency point welding machine, positioning the longitudinal edge of the steel-copper composite coiled material by using a module, and spot welding the steel-copper composite coiled material to weld the copper foil coil and the stainless steel coil together;
step d: blanking, cutting the spot-welded steel-copper composite coiled material into heat exchange plates with corresponding specifications according to specified dimensions by using a cutting machine;
step e: forming, namely performing continuous punch forming on the cut heat exchange plate by using a press to obtain the heat exchange plate with the corrugated surface;
step f: punching, namely continuously punching the formed heat exchange plate to form corner holes on the periphery, cutting mark grooves at the edge flanging, and designing the mark grooves of the upper and lower adjacent heat exchange plates in a staggered manner;
step g: stacking, cleaning and drying, and then sequentially stacking and pressing the heat exchange plates to form a heat exchange plate group;
step h: and brazing, namely feeding the heat exchange plate group into a continuous controlled atmosphere brazing furnace or a vacuum brazing furnace for brazing to obtain a finished heat exchanger.
2. The process according to claim 1, wherein the copper foil coil is selected from 0.035-0.05mm copper foil coil.
3. The production process of the steel-copper composite assembled heat exchanger according to claim 1, wherein two asymmetric 1mm small holes are punched at one corner hole edge of one of the heat exchange plates in the step f, the small holes are staggered with corresponding corner holes of the adjacent heat exchange plates, and a conducting medium enters the heat exchange pore channels.
4. The production process of the steel-copper composite assembled heat exchanger according to claim 3, wherein the corner hole where the small hole is located sinks, the corner hole where another adjacent heat exchange plate is located protrudes upwards, and the outer diameter of the protruding corner hole is smaller than that of the sinking small hole, so that the small hole is exposed.
5. The process for producing a steel-copper composite assembled heat exchanger according to claim 1, wherein the helium test is performed at 2 to 3MPa after the step h.
6. The production process of the steel-copper composite assembled heat exchanger according to claim 1, wherein the continuous controlled atmosphere brazing furnace or the vacuum brazing furnace in the step h is composed of a heating system, a cooling system, a transmission system, a control system and a gas supply system device; the furnace body adopts a heat-resistant steel muffle furnace chamber; the electric heating element heats up and down; the mesh belt conveying is stepless and adjustable; the ammonia decomposed nitrogen-hydrogen mixed gas enters the hearth after being purified, thereby achieving the effect of protecting against oxidation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211107640.3A CN115319427A (en) | 2022-09-13 | 2022-09-13 | Production process of steel-copper composite assembled heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211107640.3A CN115319427A (en) | 2022-09-13 | 2022-09-13 | Production process of steel-copper composite assembled heat exchanger |
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| CN115319427A true CN115319427A (en) | 2022-11-11 |
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| CN202211107640.3A Pending CN115319427A (en) | 2022-09-13 | 2022-09-13 | Production process of steel-copper composite assembled heat exchanger |
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-
2022
- 2022-09-13 CN CN202211107640.3A patent/CN115319427A/en active Pending
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