CN100522408C - Processing method of coated steel plate - Google Patents
Processing method of coated steel plate Download PDFInfo
- Publication number
- CN100522408C CN100522408C CNB001053523A CN00105352A CN100522408C CN 100522408 C CN100522408 C CN 100522408C CN B001053523 A CNB001053523 A CN B001053523A CN 00105352 A CN00105352 A CN 00105352A CN 100522408 C CN100522408 C CN 100522408C
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- China
- Prior art keywords
- steel plate
- coated steel
- bending machining
- aforementioned
- processing method
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/008—Bending sheet metal along straight lines, e.g. to form simple curves combined with heating or cooling of the bends
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/06—Walls
- F25D23/062—Walls defining a cabinet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2201/00—Insulation
- F25D2201/10—Insulation with respect to heat
- F25D2201/12—Insulation with respect to heat using an insulating packing material
- F25D2201/126—Insulation with respect to heat using an insulating packing material of cellular type
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Laminated Bodies (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Refrigerator Housings (AREA)
Abstract
A working method of a painted steel plate of the invention can prevent a painted film at the bent part from degrading in bending the painted steel plate and allow a cold rolled steel plate for a base steel plate for a painted steel plate to be used. The working method of a painted steel plate has a bending process to bend the painted steel plate and a heating process to heat at least a bent part of the painted steel plate. By this method, in bending the painted steel plate, even if a residual stress is generated to a painted film at a bent part, at least a bent part of the painted steel plate is heated by the heating process, so that the residual stress is eliminated.
Description
The present invention relates to the steel plate (coated steel plate) that passes through application is in advance processed, for example, be applicable to the processing method of the coated steel plate of making outcase of refrigerator.
When making outcase of refrigerator, adopt coated steel plate (being called PCM (metallizing sheet material)) is cut into the regulation shape, it carried out the shell preparation method of bending machining simultaneously.After utilizing this method to make shell, owing to can omit the operation of shell being carried out application, so, improved the production efficiency of refrigerator.
But, when coated steel plate is carried out bending machining, when particularly forming the bending machining of the part that is equivalent to the refrigerator flange portion in the end of coated steel plate (this bending machining is called cold rolling processing), through the filming of position of bending machining deterioration takes place sometimes.Specifically, fine crack appears in the filming of above-mentioned flange portion of the residual stress coated steel plate during owing to bending machining sometimes, and moisture just might immerse in these microscopic checks like this.
At this moment, owing to the steel plate as the coated steel plate substrate is the zinc steel plate, so even there is moisture to immerse the microscopic checks of filming, steel plate can not get rusty yet.Therefore, for reducing the manufacturing cost of outcase of refrigerator, people attempt using cold-rolled steel sheet (SPCC) to replace the base steel sheet of coated steel plate in recent years.When cold-rolled steel sheet was used as the base steel sheet of coated steel plate, if moisture immerses the microscopic checks that produces because of above-mentioned bending machining on filming, then steel plate may get rusty.So cold-rolled steel sheet can not use as the base steel sheet of coated steel plate.
Therefore, the purpose of this invention is to provide when coated steel plate is carried out bending machining, can prevent processing method through the coated steel plate of the deterioration of filming of the part of bending machining.
The feature of the processing method of coated steel plate of the present invention is, possess the bending machining operation of coated steel plate being carried out bending machining, and the heater of using the part to the bending machining in the coated steel plate to heat heating process that the bending machining in the coated steel plate is partly heated.
When utilizing said method that coated steel plate is carried out bending machining, even on the filming of bending machining part the effect of residual stress is arranged, owing to carried out heating process, promptly to heating through the part of bending machining at least in the coated steel plate, so, can eliminate above-mentioned residual stress.The deterioration of filming of the bending machining part in the time of like this, just can preventing that coated steel plate carried out bending machining.
In this external aforementioned heating process, be preferably, utilize the means of high-frequency heating that the aforementioned line heating furnace that is coated with is partly heated the bending machining in the aforementioned coated steel plate.
On the other hand, in the aforementioned heating process, be preferably, the bending machining part blowing hot-air in the aforementioned coated steel plate is heated this part.Another preferably method be in aforementioned heating process, partly spill hot water in the bending machining of aforementioned coated steel plate and heat.
The processing method of coated steel plate also possesses by aforementioned coated steel plate is carried out the manufacturing process that bending machining is made outcase of refrigerator, and foam filled polyurethane foam forms the operation of heat insulating box between aforementioned shell and interior case.When aforementioned shell being carried out preheating, preferably carry out aforementioned heating process simultaneously for foam filled aforementioned polyurethane foam.
In addition, preferably by to being that the steel plate of substrate is filmed to handle and constituted aforementioned coated steel plate with the cold-rolled steel sheet.Further, preferably to being that the steel plate of substrate is filmed to handle and constituted aforementioned coated steel plate with the zinc steel plate.
Below, with reference to figure 1～Fig. 3, the present invention is applicable to the embodiment 1 of the preparation method of outcase of refrigerator describes.At first, Fig. 2 is the production process figure of the outcase of refrigerator of present embodiment.Shown in Fig. 2 (a), at first prepare coated steel plate 1.This coated steel plate 1 is at the steel plate that the is substrate steel plate that processing (being the PCM application) forms of filming with cold-rolled steel sheet (being SPCC).In the present embodiment, having used polyester is coating.
Shown in Fig. 2 (b), carry out the marginal portion of coated steel plate 1 is cut into the regulation shape operation in the hole of stipulating on the brill etc.Then, shown in Fig. 2 (c), by to the upper and lower end parts among the figure of coated steel plate 1 carry out bending machining (bending machining is also referred to as cold rolling processing, i.e. the CRF processing and forming), form the part 2 that is equivalent to the outer shell flanch part in the upper and lower end parts of coated steel plate 1.Then, shown in Fig. 2 (d),, make shell 3 by coated steel plate 1 being carried out bending machining such as U type bending.At this moment, Fig. 2 (c) and operation (d) are equivalent to bending machining operation of the present invention.
Then, heat the heating process of the above-mentioned bending machining part in the coated steel plate 1.Present embodiment is with the above-mentioned whole stove of putting into of coated steel plate 1 (that is, shell 3) through bending machining, and temperature in the stove is set in about 100 ℃, carries out heating in 30 minutes (that is annealing).
Shown in Fig. 2 (e), next door 5 etc. is installed in above-mentioned shell 3 and 4 foam filled polyurethane foams of interior case and makes the heat insulating box 6 of refrigerator.Then, shown in Fig. 2 (f), by the kind of refrigeration cycle of on above-mentioned heat insulating box 6, compressor, radiator and condenser etc. being installed, electronic units such as fan assembly, sensor and control circuit, and the door of each opening portion of switch refrigerating chamber and refrigerating chamber etc. etc. has just constituted the assembling finished product of refrigerator 7.
The manufacturing process flow chart of simple declaration shown in Fig. 1 (a) to the manufacturing process of the shell 3 of the refrigerator 7 of present embodiment.That is, the manufacturing process of present embodiment possess to cold rolling next door (SPCC) carry out the PCM application operation, coated steel plate 1 is carried out the CRF molding procedure of bending machining and to the annealing of heating through the coated steel plate 1 of bending machining this 3 procedure of operation of heating.In addition, the manufacturing process of the outcase of refrigerator of traditional structure possesses this 2 procedure of CRF moulding that uses the zinc steel plate and carry out the PCM application and coated steel plate is carried out bending machining on this zinc steel plate shown in Fig. 1 (b).
Below, to the effect of present embodiment, promptly increase the heat effect of operation of above-mentioned annealing and describe.At first, as shown in Figure 3, if coated steel plate 1 is carried out bending machining, and make on the surface coating through the bending machining part 2a of bending machining and 2b and have residual stress, filming when then using cleaning agent etc. microscopic checks to occur.And whether this microscopic checks occurs and can judge by carrying out rust staining whether occurring after the following salt spraytest.Salt spraytest uses methyl alcohol to spray salt solution aerosol (salt spraytest) exactly after above-mentioned bending machining position 2a and 2b surface wiping 30 times (so-called methyl alcohol wiping), judges the test that rust staining whether occurs after 300 hours.In this test, if rust staining, then can think microscopic checks to have occurred on the surface coating of bending machining part 2a and 2b.
In addition,, and only carry out salt spraytest, also can confirm not have rust staining by test and occur if do not carry out 30 times above-mentioned methyl alcohol wipings.That is, above-mentioned methyl alcohol can make microscopic checks occur, and makes paint blister, so just can play to promote moisture to immerse the effect in filming.In the actual environment for use of refrigerator, the user is a cleaning agent wiping refrigerator and carry out cleaning with alcohol, utilizes above-mentioned methyl alcohol to reproduce this cleaning operation.
After carrying out above-mentioned bending machining, the operation (heating process) of heating of annealing again partly heats the bending machining in the coated steel plate 1, then can eliminate above-mentioned residual stress.In fact, corresponding to the above-mentioned annealing operation of heating, even carry out above-mentioned salt spraytest (30 times methyl alcohol wiping and salt spraytests), rust staining can not appear yet.At this moment, can discharge the interior residual stress of filming at short notice by annealing.And, can strengthen the sintering of filming.In addition, corresponding to above-mentioned annealing in process, even only carry out under the situation of salt spraytest not carrying out 30 times methyl alcohol wiping, rust staining can not appear yet.
Present inventor's experimental result is shown in following table 1.
Table 1
| Annealing after the bending machining (heating) | The methyl alcohol wiping | Whether there is rust staining to occur | |
| No.1 | Do not have | Do not have | Do not have |
| No.2 | Do not have | (30 times) are arranged | Have |
| No.3 | (100 ℃ * 30 minutes) are arranged | Do not have | Do not have |
| No.4 | (100 ℃ * 30 minutes) are arranged | (30 times) are arranged | Do not have |
Can find out from table 1, in the present embodiment, by the processing of heating of after the bending machining of coated steel plate 1, annealing, the deterioration of the surface coating of bending machining part 2a and 2b in the time of can preventing that coated steel plate 1 carried out bending machining.And what the substrate of the coated steel plate 1 in the foregoing description was used is cold-rolled steel sheet (being SPCC), so, to compare with the conventional steel plates that with the zinc steel plate is substrate, the manufacturing cost of shell 3 is lower.
In addition, the annealing of the foregoing description operation (heating process) of heating is will be through heating 30 minutes under 100 ℃ temperature in the coated steel plate 1 whole input stove of bending machining, but have more than this situation that is limited to, heating-up temperature and heat time heating time also can be done suitable change.For example, heating-up temperature can be set in the scope about 80 ℃～150 ℃, can be set in heat time heating time in the scope about 3 second～30 minute.At this moment, heating-up temperature is high more, and heat time heating time is short more.
The foregoing description is a situation about heating through the coated steel plate 1 of bending machining whole, also can only partly heat the bending machining in the coated steel plate 1.For example, the processing method of the such coated steel plate of embodiment shown in Figure 42.
As shown in Figure 4, in embodiment 2, utilize as the high-frequency heating of high-frequency heating means 8 and only the bending machining part 2 in the coated steel plate 1 is heated.Above-mentioned high-frequency heating 8 is to radiate the device of high frequency waves in the high frequency generating apparatus that does not show from figure.And under the situation of this structure, high-frequency heating 8 side are fixed, under high-frequency heating 8 state near bending machining part 2, the direction of arrow in coated steel plate 1 lateral view 4 is moved, so just can carry out high-frequency heating continuously to above-mentioned bending machining part 2.
The structure of embodiment 2 beyond above-mentioned is all identical with embodiment 1, so embodiment 2 can obtain the action effect much at one with embodiment 1.
In addition,, have more than this situation that is limited to, for example, also can utilize infrared furnace to heat though the foregoing description 2 is to utilize high-frequency heating 8 structure that only the bending machining part 2 in the coated steel plate 1 heated.In addition, by only bending machining part 2 blowing hot-airs in the coated steel plate 1 (for example, the hot blast more than 200 ℃) being come above-mentioned part 2 is heated.Also can spill hot water on the bending machining part 2 in the coated steel plate 1 comes this part is heated.
On the other hand, when making refrigerator, possess foam filled polyurethane foam between shell and interior case and form the operation of heat insulating box, in this operation, be foam filled polyurethane foam, use preheating furnace that shell has been carried out preheating.Therefore, be preferably in and also carry out aforementioned heating process (annealing heat operation) when shell being carried out preheating simultaneously with above-mentioned preheating furnace.
In the various embodiments described above, what use all is at the coated steel plate 1 that has carried out on as the steel plate of substrate with cold-rolled steel sheet (SPCC) filming, and also can use at the steel plate that has carried out on as the steel plate of substrate with the zinc steel plate filming.Adopt this structure to can further improve corrosion resistance (antirust).
In addition, in the above-described embodiments, the present invention system is applied to possess and makes coated steel plate 1 carry out the method for CRF molding procedure, but have more than this situation that is limited to, for example, the present invention is equally applicable to possess the method that makes coated steel plate extrusion modling operation, in this case, can the coated steel plate after the extrusion modling be heated.
As mentioned above, the present invention is owing to possess the bending machining operation of coated steel plate being carried out bending machining, and the heating process that at least bending machining in the coated steel plate is partly heated, so, when coated steel plate is carried out bending machining, can obtain to eliminate residual stress on the filming of bending machining part, prevent partly the film good result of deterioration of above-mentioned bending machining.
Fig. 1 is the shell manufacturing process flow chart of embodiments of the invention 1.
Fig. 2 is the rough schematic of the manufacturing process of shell and refrigerator.
Fig. 3 is the local side figure of the bending machining part of coated steel plate.
Fig. 4 is the coated steel plate of embodiments of the invention 2 and the stereogram of high-frequency heating head.
Among the figure, 1 expression coated steel plate, 2 expression bending machining parts, 3 expression shells, 6 expression heat insulating boxes, 7 expression refrigerators, 8 expression high-frequency heating heads.
Claims (7)
1. the processing method of a coated steel plate, it is characterized in that, comprise carrying out the bending machining operation of bending machining through the coated steel plate of application in advance, and the heating process of using heater that the bending machining in the coated steel plate is partly heated that the bending machining in the coated steel plate is partly heated.
2. the processing method of coated steel plate as claimed in claim 1, its feature is that also aforementioned heating process is to utilize the high-frequency heating means that the bending machining in the aforementioned coated steel plate is partly heated.
3. the processing method of coated steel plate as claimed in claim 1, its feature is that also aforementioned heating process is to utilize infrared heating device that the bending machining in the aforementioned coated steel plate is partly heated.
4. the processing method of coated steel plate as claimed in claim 1, its feature is that also aforementioned heating process is that the bending machining part blowing hot-air in the aforementioned coated steel plate is heated this part.
5. the processing method of coated steel plate as claimed in claim 1, its feature also is, possess by aforementioned coated steel plate is carried out the manufacturing process that bending machining is made outcase of refrigerator, and between aforementioned shell and interior case foam filled polyurethane foam and form the operation of heat insulating box; When aforementioned shell being carried out preheating, carry out aforementioned heating process simultaneously for foam filled aforementioned polyurethane foam.
6. as the processing method of each described coated steel plate of claim 1～5, its feature also is, aforementioned coated steel plate is the steel plate that the back forms of filming on the steel plate that is substrate with the cold-rolled steel sheet.
7. as the processing method of each described coated steel plate of claim 1～5, its feature also is, aforementioned coated steel plate is the steel plate that the back forms of filming on the steel plate that is substrate with the zinc steel plate.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11218748A JP2001047136A (en) | 1999-08-02 | 1999-08-02 | Working method of painted steel plate |
| JP218748/1999 | 1999-08-02 | ||
| JP218748/99 | 1999-08-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1282637A CN1282637A (en) | 2001-02-07 |
| CN100522408C true CN100522408C (en) | 2009-08-05 |
Family
ID=16724810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001053523A Expired - Lifetime CN100522408C (en) | 1999-08-02 | 2000-03-30 | Processing method of coated steel plate |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2001047136A (en) |
| KR (1) | KR100345612B1 (en) |
| CN (1) | CN100522408C (en) |
| TW (1) | TW492895B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005343518A (en) * | 2004-06-03 | 2005-12-15 | Mitsubishi Materials Corp | Bottle can manufacturing method and bottle can with cap |
| WO2008017257A1 (en) * | 2006-08-02 | 2008-02-14 | Hangzhou Huitong Driving Chain Co., Ltd. | A bended link plate and the method to making thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0543293B1 (en) * | 1991-11-15 | 2000-06-07 | Sumitomo Electric Industries, Ltd | Coated article and method for producing same |
-
1999
- 1999-08-02 JP JP11218748A patent/JP2001047136A/en active Pending
-
2000
- 2000-03-10 TW TW089104433A patent/TW492895B/en not_active IP Right Cessation
- 2000-03-30 CN CNB001053523A patent/CN100522408C/en not_active Expired - Lifetime
- 2000-04-20 KR KR1020000020906A patent/KR100345612B1/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0543293B1 (en) * | 1991-11-15 | 2000-06-07 | Sumitomo Electric Industries, Ltd | Coated article and method for producing same |
Non-Patent Citations (1)
| Title |
|---|
| 昭51-8654 1976.03.18 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001047136A (en) | 2001-02-20 |
| KR100345612B1 (en) | 2002-07-24 |
| KR20010020765A (en) | 2001-03-15 |
| CN1282637A (en) | 2001-02-07 |
| TW492895B (en) | 2002-07-01 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: Tokyo, Japan Patentee after: Kabushiki Kaisha TOSHIBA Address before: Kanagawa Patentee before: Kabushiki Kaisha TOSHIBA |
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| TR01 | Transfer of patent right |
Effective date of registration: 20160819 Address after: Tokyo, Japan Patentee after: TOSHIBA LIFESTYLE PRODUCTS & SERVICES Corp. Address before: Tokyo, Japan Patentee before: Kabushiki Kaisha TOSHIBA |
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| CX01 | Expiry of patent term |
Granted publication date: 20090805 |
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| CX01 | Expiry of patent term |