CN1695875A - Method for removing resin layer from resin-coated metal tube - Google Patents
Method for removing resin layer from resin-coated metal tube Download PDFInfo
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- CN1695875A CN1695875A CN 200510078891 CN200510078891A CN1695875A CN 1695875 A CN1695875 A CN 1695875A CN 200510078891 CN200510078891 CN 200510078891 CN 200510078891 A CN200510078891 A CN 200510078891A CN 1695875 A CN1695875 A CN 1695875A
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- resin bed
- metal tube
- laser beam
- resinous coat
- coat metal
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- 229920005989 resin Polymers 0.000 title claims abstract description 199
- 239000011347 resin Substances 0.000 title claims abstract description 199
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 133
- 239000002184 metal Substances 0.000 title claims abstract description 133
- 238000000034 method Methods 0.000 title claims abstract description 97
- 239000011248 coating agent Substances 0.000 claims description 21
- 238000000576 coating method Methods 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 19
- 230000001678 irradiating effect Effects 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 8
- 229920003023 plastic Polymers 0.000 claims description 8
- 230000004927 fusion Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 29
- 230000014509 gene expression Effects 0.000 description 16
- 239000010408 film Substances 0.000 description 11
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 229910052725 zinc Inorganic materials 0.000 description 6
- 239000011701 zinc Substances 0.000 description 6
- 241000283014 Dama Species 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 5
- JNSGIVNNHKGGRU-JYRVWZFOSA-N diethoxyphosphinothioyl (2z)-2-(2-amino-1,3-thiazol-4-yl)-2-methoxyiminoacetate Chemical compound CCOP(=S)(OCC)OC(=O)C(=N/OC)\C1=CSC(N)=N1 JNSGIVNNHKGGRU-JYRVWZFOSA-N 0.000 description 5
- -1 polypropylene Polymers 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 229920002620 polyvinyl fluoride Polymers 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000004952 Polyamide Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000013532 laser treatment Methods 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000002421 anti-septic effect Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- 239000007788 liquid Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
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- 238000003825 pressing Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- BSYNRYMUTXBXSQ-UHFFFAOYSA-N Aspirin Chemical compound CC(=O)OC1=CC=CC=C1C(O)=O BSYNRYMUTXBXSQ-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
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- 239000011247 coating layer Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Laser Beam Processing (AREA)
Abstract
A method is provided for removing a resin layer of a resin-coated metal tube. The resin layer is removed with a laser beam. More particularly, the resin layer of a desired range is burned out by focusing the laser beam into a pinpoint without defocusing the sectional shape of the laser beam in the axial direction o the resin-coated metal tube.
Description
Technical field
The present invention relates to a kind of being used for from the method for resinous coat metal tube removing films shape resin bed, this resinous coat metal tube is a kind of metal tube, it has 20 millimeters or littler relatively little diameter, and can be used as the automobile pipeline, the oil pressure pipeline, fuel channel, gas pipeline or other similar pipeline, be particularly useful for the pipeline of car body lower end, and it prevents cracked (being caused by the finger stone of kicking up) or (muddy water) spilling when having thin film shape resin bed to be used at running car on its outer circumference surface, wherein resin bed can be removed for example to slot by following process, reel, the end that processes the resinous coat metal tube is handled in expander and/or enlarging, and/or forms a clamping part that is used for clamping element at the mid portion of resinous coat metal tube.More particularly, the present invention relates to a kind of method of using laser beam to remove resin bed.
Background technology
In the last few years, be placed in the pipe fitting of automobile lower, for example trunk line, return conduits or evaporation tube and other pipelines of fuel mostly are the resinous coat metal tubes for example to be used for oil pressure pipe fitting, the fuel channel of power steering gear, it has the resinous coat that is formed by film shape at least, perhaps if desired, thus also can be by the thick film shape form can prevent cracked and the opposing spilling.
In addition, this has being prepared as follows of metal tube of coating: if necessary, form chromate film on coating, described coating is plated in zinc or zinc/nickel on the outer circumference surface of metal tube by electricity, chemistry or melting method; On described chromate film, apply about 20 microns epoxy-based lacquers and the polyvinyl fluoride (PVF) of a bed thickness; On its whole length, cover thermally shrinking pipe in addition again to form polymer coating.Another kind of known coating metal pipe is by extrusion modling resins on zinc or zinc/aluminium coat, this resin for example is the polyamides ammonium resin PA with about 200 to 300 micron thickness, for example PA11 or PA12, or having the polypropylene resin (PP) of about 1 millimeters thick, wherein said zinc or zinc/aluminium coat are coated on the excircle of metal tube.
If to metal tube carry out that terminal processing is for example slotted, coiling, expander or enlarging handle, and perhaps forms to have the clamping part that is used for clamping element, just must remove the external resin layer of coating metal pipe or polymer coating metal tube in advance.This resin bed stripping means can for example be a cutting process.Yet, because the unevenness of uneven metal target pipe, for example the circumferential size variation of each layer, glacing flatness, external diameter, thickness or the like, above-mentioned cutting process can not be removed resin bed equably.In some cases, cutting edge may swipe or damage and will be left as internal layer following coating or resin bed.Another kind of difficulty is to waste time and energy, this be because when peeling off resin bed, must have no evenly to peel off with damaging with given over to internal layer below coating and resin bed.
Therefore, we had before proposed a kind of method of peeling off resin bed from the resinous coat metal tube, this method can be peeled off above-mentioned resin bed very simple and reliablely and can not damage bottom, and, if outer field resin is softer than internal layer, or even under the situation that is equipped with the polymer coating resin bed, this method is peeling outer layer (referring to JP-A-11-82820) only also.
One of principal character of this method is: when resin bed when the resinous coat metal tube is peeled off, wherein this metal tube is made the basic back coated with resins layer that applies at its outer peripheral face, this resin bed is subjected to the pushing of stripper roll, and this stripper roll inwardly pushes resin bed and metal tube and pressing device from outer radial and circumferentially moves relative to each other.Figure 13 is the schematic diagram that shows an example of this method.Resin bed (epoxy resin, PVF, polypropylene, polyethylene or polyamide) 1-2 is stripped from by turning round and push a plurality of stripper roll 3 on the resin bed 1-2 of resinous coat metal tube 1, wherein metal tube 1 has metal tube 1-1, metal tube 1-1 is coated with resin bed 1-2 on its periphery, stripper roll 3 be approximately the metal tube 1-1 that 20 millimeters or littler steel pipe make by diameter and be provided with one heart.
According to this method, can obtain following effect:,, also can very simply and not peel off also peeling outer layer only of resin bed even under the situation that is formed with the polymer coating resin bed if outer make by the resin softer than internal layer with damaging bottom.
If the resin bed 1-2 of resin coating metal pipe is stripped from roller 3 radially pushing from outside to inside, by promoting and rotate stripper roll 3, thereby resin bed 1-2 can extend its inner periphery is extended, though know not really why resin bed can be peeled off from the excircle of metal tube 1-1.This separation is seemingly caused by the rotation of the roller 3 that contacts with the inner periphery of the extension of resin bed 1-2, so have only resin bed 1-2 to be stripped from.
Yet, for the resinous coat metal tube, particularly for scribbling the resinous coat metal tube that one deck has extra high antiseptic property nylon, when using said method shown in Figure 13 to remove nylon coating, will cause such problem: can produce the nylon burr 1-2 ' that is known as " Hige " or " Dama " at the edge of removal portion, as shown in figure 14.This burr can cause following problems, for example pollutes or reduces sealing property, therefore must remove above-mentioned burr by cutting element or similar tool.So just increased unnecessary operation number.
At the problems referred to above, we have also proposed a kind of method (referring to JP-A-2002-143398) of removing resin bed, even for having applied the resinous coat metal tube with high antiseptic property nylon, this method can not form the burr that is known as " Hige " or " Dama " as the said method that uses stripper roll yet in the marginal portion.
Shown in Figure 15 and 16, in this method, resin bed 11-2 is by stripper roll 12 radially pushing from outside to inside, and metal tube 11-1 and stripper roll 12 relative to each other circumferentially move, thereby peel off and remove resin bed 11-2.The method is characterized in that: by pressing device be roller 12-1 on the resin bed 11-2 corresponding to the pushing on certain part of the pushing portion boundary part of stripper roll 12, form rolled portion 15 (Figure 16), thereby have step and/or groove less than resin layer thickness.
According to this method, can be very simply and remove resin bed reliably and can not damage bottom, also can not form the burr that be known as " Hige (sharp burr) " and " Dama (round end burr) " in the end.
On the other hand, a kind of method of using laser beam to remove resin bed from the resinous coat metal tube is disclosed in JP-C-3346580.This method make laser beam with circular or usually with elliptical shape in cross-section pipe axially on scatter and gasify and remove resin coating layer.As disclosed among the JP-C-3346580, the method for this use laser ablation resin bed can be removed resin bed and can not stayed not removal portion or form burr.And this method can be removed resin bed and can not damage the surface-treated layer of bottom, metal tube of resinous coat metal tube or coating or the like, also can remove one or more layers of multi-layer resinous film.
Summary of the invention
At this, the method (JP-A-2002-143398) of above-mentioned removal resin bed is well, can not form the burr that is known as " Hige (sharp burr) " or " Dama (round end burr) " in its end because it can remove resin bed.But as shown in figure 16, this method has a rolled portion 15, and resin bed just has a not 11-2a of removal portion inevitably like this.And, even when adopting above-mentioned method with stripper roll,, also can generate burr 11-2b, as shown in figure 17 in edge not having rolled portion 15 or produce under the situation of the burr that is known as " Hige " or " Dama " to finish stripping operation.This not removal 11-2a of portion or burr 11-2b can produce the quality of product and have a strong impact on, and must use bite to remove by hand after therefore processing.The above-mentioned not removal portion of resin bed or the removal of burr have brought trouble and have caused high production cost, and cutting edge may cause undesirable damage to the coating of bottom.
On the other hand, also be defective by laser beam being defocused the method (JP-C-3346580) that ovalisation removes resin bed, because the size that it needs the laser of highoutput to come the expansion of laser light oscillator will cause equipment cost to improve like this.In addition, in order to change mobile stroke of peeling off width (or removing width), thickness of resin film, laser beam of resin bed or the like, need be used to the complexity control of blocking laser beam or changing amasthenic lens.Therefore, this method has the shortcoming that is unsuitable for diversified production.
The present invention is intended to eliminate the above-mentioned defective of prior art, and being intended to propose a kind of method of removing the resin bed of resinous coat metal tube, this method makes the following fact become possibility: not by hand but automatically peel off resin bed and can not stay any resin bed of not removing; Can use low-energy laser ablation resin bed; Only just can regulate mobile, the peeling rate or the like of the thickness of peeling off axial length (or removing length), resin bed, the laser beam of resin bed by the data of adjusting laser control apparatus; And just do not need to reset and to carry out the production of diversified product.
In the method for the resin bed of removal resinous coat metal tube according to the present invention, by using laser beam irradiation resin bed resin bed is burnt from the resinous coat metal tube, wherein this resinous coat metal tube has the metal tube that is coated with resin bed, and the cross sectional shape by laser beam being focused into a bit rather than making laser beam the resinous coat metal tube axially on scatter and burn resin bed in the desired extent.And, in the method, be focused into the laser beam of any and on vertical and horizontal, carry out palisade scanning and the resin bed in the desired extent is burnt with piece shape by emission.In addition, by repeating to implement the palisade scan operation resin bed in the desired extent is burnt with a plurality of shapes.Also have, in the method for the resin bed of removing the resinous coat metal level, shine the method that resin bed is burnt resin bed as laser beam, when fixing resin coating metal pipe, can carry out the irradiation of first laser beam, and after the irradiation of finishing expection length, by with resinous coat metal tube or laser irradiation device revolution predetermined angular and be fixed then and use laser beam to shine remaining resin bed.In addition, as method, can use a plurality of laser irradiation devices to burn resin bed by using laser beam irradiation resin bed to burn resin bed.
According to the present invention, remove in the method for resin bed by laser beam irradiation resin bed at one, fixedly the time, metal tube can rotate at laser irradiation device, and perhaps at metal tube fixedly the time, laser irradiation device can rotate.In addition, when burning resin bed, be directed on the resin bed by changing the laser irradiating angle by use laser beam irradiation resin bed with making laser beam zigzag or spirality, and by using speculum that laser beam is led.In addition, in the removal method of these resin beds, by after using laser beam irradiation resin bed to burn resin bed, the irradiation that the edge of removed resin bed is subjected to laser beam again is to seal by fusion or the welding end with resin bed.And the present invention is combined in a kind of automatic pipe fitting production line, and this production line carries out plastic working to the end of pipe fitting when carrying pipe fitting continuously by the auto-feed unit.
The present invention has used a kind of like this method: laser beam can not scatter in the axial direction but be focused into any and carry out palisade scanning at high speed, compare with the method for defocused laser beams, can remove resin bed with the laser beam of low-yield output, its equipment cost and operating cost will significantly reduce like this.This method only just can be regulated the moving of the thickness of peeling off axial length (or removing length), resin bed, laser beam, peeling rate of resin bed or the like at an easy rate by the data of adjusting laser control apparatus, and energy need not be reset the production that can handle diversified product.
In addition, above-mentioned resin bed can be removed fully and can not formed not removal portion, burr or the like.And, remove resin bed and can not damage the bottom of resinous coat metal tube, surface-treated layer, coating or other similar layer of metal tube by the output quantity of regulating laser beam.Remove multi-layer resinous film one or more layers or to regulate thickness of resin film also be possible.In the removal method of this resin bed, after using laser beam irradiation resin bed that it is burnt, the irradiation that the edge part of removed resin bed is subjected to laser beam again with the end by fusion or welding resin layer with its sealing.Therefore, the sealing property between metal tube and the resin bed is improved, thereby prevents fully between liquid intrusion metal tube and the resin bed.
In addition, according to the present invention, laser machining device is combined in the automatic pipe fitting production line, when carrying pipe fitting continuously by the auto-feed unit, this production line carries out plastic working to the end of pipe fitting, the plastic working that can carry out the removal of resin bed and terminal so continuously for example the enlarging, operating winding of resinous coat metal tube to reduce production costs.
Description of drawings
Fig. 1 be show the method for the invention operator scheme example schematically illustrate figure, this method is focused into any with laser beam and carries out the scanning of high speed palisade;
Fig. 2 be in operator scheme shown in Figure 1 from the resinous coat metal tube remove resin bed method first embodiment schematically illustrate figure;
Fig. 3 also be to use method shown in Figure 1 remove from the resinous coat metal tube resin bed method second embodiment schematically illustrate figure;
Fig. 4 is the schematic side elevation of first embodiment that is used to implement the device of the method for the invention;
Fig. 5 is the front schematic view of device shown in Figure 4;
Fig. 6 is the schematic side elevation of second embodiment that is used to implement the device of the method for the invention;
Fig. 7 is the front schematic view of device shown in Figure 6;
Fig. 8 is the front schematic view of the 3rd embodiment that is used to implement the device of the method for the invention;
Fig. 9 also is the front schematic view of the 4th embodiment that is used to implement the device of the method for the invention;
Figure 10 also is the front schematic view of the 5th embodiment that is used to implement the device of the method for the invention;
Figure 11 is the schematically vertical side view of an example that is used for improving the method for the sealing property between metal tube and the resin bed after removing resin bed;
Figure 12 is the figure that schematically illustrates of an embodiment, and method wherein of the present invention is bonded in the automatic pipe fitting production line;
Figure 13 is the schematic side elevation that shows an example of resin bed stripping off device in the prior art;
Figure 14 show to use device shown in Figure 7 to remove the cross-sectional view of the part of resinous coat metal tube behind the resin bed;
Figure 15 is the side view that shows another example of resin bed stripping off device in the prior art;
Figure 16 shows that device shown in Figure 15 removes half cross-sectional view of the amplification of the part of resinous coat metal tube behind the resin bed; And
Figure 17 shows the enlarged side view of removing the part of resinous coat metal tube behind the resin bed with resin bed stripping off device in the prior art.
The specific embodiment
Fig. 1 be expression the method for the invention operator scheme an example schematically illustrate figure, this method is focused into laser beam a bit to carry out the scanning of high speed palisade; Fig. 2 be show with operator scheme shown in Figure 1 remove from the resinous coat metal tube resin bed method first embodiment schematically illustrate figure; Fig. 3 also be show to use method shown in Figure 1 remove from the resinous coat metal tube resin bed method second embodiment schematically illustrate figure; Fig. 4 is the schematic side elevation that shows first embodiment of the device be used to implement the method for the invention; Fig. 5 is the front schematic view of device shown in Figure 4; Fig. 6 is the schematic side elevation of second embodiment that is used to implement the device of the method for the invention; Fig. 7 is the front schematic view of device shown in Figure 6; Fig. 8 also is the front schematic view that shows the 3rd embodiment of the device be used to implement the method for the invention; Fig. 9 also is the front schematic view that shows the 4th embodiment of the device be used to implement the method for the invention; Figure 10 is the front schematic view that shows the 5th embodiment of the device be used to implement the method for the invention; Figure 11 is used to be presented at the schematically vertical side view of an example removing the method that improves the sealing property between metal tube and the resin bed after the resin bed; And Figure 12 shows that this method of the present invention is combined in the figure that schematically illustrates of an embodiment in the automatic pipe fitting production line.The shape of cross section of a tiny dots laser beam of reference number 20 expressions; Numeral 21 expression resinous coat metal tubes (or workpiece); Numeral 22 expression laser irradiation devices; Numeral 23 expression anchor clamps, numeral 24 expression gears; Numeral 25 expression pinions; Numeral 26 expression drive motors; Numeral 27 expression dish type speculums; Numeral 28 expression Perimeter Truss Reflectors; Numeral 30 expression inclined tubes; Numeral 31 expression pipe fitting mobile units; Numeral 32 expression terminal processes unit; Numeral 33 expression pipe fitting feed units; Numeral 34 expression pipe fitting transport vehicles; Numeral 35 expression laser work unit; Letter w 1 and W2 represent the horizontal and vertical length of template (also promptly square) respectively; Letter h represents grating length.
At first, resinous coat metal tube 21 comprises: be approximately the metal tube 21-1 of the relative thin that 20 millimeters or littler steel pipe make, for example electroforming pipe that is formed by the one layer or more copper alloy coating, seamless steel pipe, half seamless steel pipe or welded tube or welded pipe by diameter; With the resin bed 21-2 on the excircle that is coated in metal tube 21-1, its polymer resins layers by epoxy resin and PVF forms, or is formed by the single film layer resin of one of polypropylene, polyethylene or polyamides ammonium resin.Here, much less, the resin bed of this resinous coat metal tube is not limited to individual layer, also can be multi-layer resinous layer.
Operator scheme shown in Figure 1 has represented that a length W1 and W2 are that 2 millimeters, wide h are 0.2 millimeter template.Laser beam gathers into round dot cross sectional shape 20 (being approximately 150 microns), and carries out palisade scanning with the speed of about 1000 mm/second as shown, thereby removes resin bed with piece shape.By in conjunction with this shape pattern, laser beam can be fit to any shape that will be removed (or peeling off).The processing time of this operator scheme as shown in Figure 1 is approximately 0.05 second, and it is 50 microns resin bed that once irradiating just can be removed thick.
Fig. 2 has illustrated a kind of method of using operator scheme shown in Figure 1 and remove resin bed 21-2 by revolution resinous coat metal tube 21 when fixed laser irradiation unit 22.In this case, the whole outer circumference surface of resin bed 21-2 is burnt fully by four laser irradiations, and promptly removing the angle of revolution by the irradiation of single laser beam is 90.Resin bed 21-2, then metal tube 21 is rotated three times, rotate 90 at every turn.。
Fig. 3 has illustrated two laser irradiation devices of a kind of use 22 to adopt the method for operator scheme removal resin bed as shown in Figure 1.Among this embodiment, shine by using two laser irradiation devices 22 on static resinous coat metal tube 21, to carry out laser simultaneously that to remove the angle of revolution be 180 ° resin bed 21-2 (i.e. half circumference).Afterwards, resinous coat metal tube 21 is rotated 180 ° being that 180 ° residual resin layer 21-2 removes with the angle of revolution.In the situation of this method, carry out the laser irradiation simultaneously, can shorten working hours and reduce the revolution stroke or the angle of resinous coat metal tube by using two laser irradiation devices 22.Thereby the temperature that this method of irradiation simultaneously can improve the resinous coat metal tube is quickly removed resin bed more efficiently.
Now the device of implementing the method for the invention is described.The device of Fig. 4 and first embodiment shown in Figure 5 has been illustrated the type of this device, wherein, and by by rotating resinous coat metal tube 21 resin bed 21-2 being removed when the fixed laser irradiation unit 22.Although the removable anchor clamps 23 that resinous coat metal tube 21 integrally is attached on the gear 24 clamp, driving by drive motors 26, resinous coat metal tube 21 rotates by pinion 25 and gear 24, laser irradiation device 22 irradiations that the laser beam 22-1 of predetermined combustion width is met at right angles at the axis with respect to the resinous coat metal tube and is provided with, resin bed 21-2 will be burnt like this.
When the resin bed 21-2 that uses this method with the resinous coat metal tube burns, can be by changing the surface of laser irradiating angle with zigzag, parallel or interleaved mode irradiation resinous coat metal tube 21.At this moment, for example, rotate 120 ° by the metal tube 21 that will scribble resin once more, resin bed 21-2 can be burnt, and repeats operation like this and just whole outer circumference surface can be burnt for three times.Perhaps, when rotating resinous coat metal tube 21, use laser beam to shine resin bed 21-2 spirally, then resin bed 21-2 can be burnt by changing the laser irradiating angle.
Next, the device of the Fig. 6 and second embodiment shown in Figure 7 shows the type of this device, wherein by rotating laser irradiation device 22 resin bed 21-2 is removed when fixing resin coating metal pipe 21.This structure is configured to that laser irradiation device 22 is arranged on the gear 24 by bracket 22-2 and meets at right angles with respect to the axle of resinous coat metal tube 21.When using the removable anchor clamps 23 that were arranged in 24 minutes with gear to clamp resinous coat metal tube 21, under the driving of drive motors 26, rotate laser irradiation device 22, so just can use laser beam 22-1 to burn resin bed 21-2 by the drive of pinion 25 and gear 24.If the resin bed 21-2 with resinous coat metal tube 21 burns with this method, similarly, by changing the irradiating angle of laser irradiation device 22, the surface of resinous coat metal tube 21 can be shone with zigzag, parallel, intersection or helicon mode.
On the other hand, as substituting of the type of the equipment of the gyration of aforementioned use resinous coat metal tube 21 or laser irradiation device 22, the device of the 3rd embodiment shown in Fig. 8 has used the device of following type, wherein, by using dish type speculum 27 to use laser beam 22-1 to remove resin bed 21-2.In such device, be arranged to have variable laser irradiating angle with respect to the resinous coat metal tube 21 rectangular laser irradiation devices 22 that clamped by anchor clamps 23, and be used for the dish type speculum 27 of laser beam 22-1 of reflector laser irradiation unit 22 and be arranged on and be 120 ° position with respect to laser irradiation device 22 on the same circumference.When changing the laser irradiating angle of laser irradiation device 22, by the resinous coat metal tube 21 that laser beam 22-1 irradiation is clamped by anchor clamps 23, and by using dish type speculum 27 reflection lasering beam 22-1, the whole circumference of the resin bed 21-2 of the part of resinous coat metal tube 21 to be burnt like this will be burnt.Among the embodiment of Miao Shuing, use two dish type speculums 27 here, but do not limited the quantity of used dish type speculum herein.
In addition, the device of the 4th embodiment shown in Figure 9 has shown the device of following type, wherein, when keeping metal tube not rotate, rotate speculum so that laser beam along with mirror rotates, like this, the whole circumference of resin bed is just burnt.Structure is configured to laser irradiation device 22 and is arranged on the axis of the resinous coat metal tube that is clamped by removable anchor clamps 23, thereby can change the laser irradiating angle, and be used for the laser beam 22-1 of reflector laser irradiation unit 22 and be attached on the gear 24 with the speculum 27 on the surface of using laser beam irradiation resinous coat metal tube 21.Under drive motors 26 effects, rotate mirror 27 by pinion 25 and gear 24, and laser beam 22-1 is moved along with the rotation of dish type speculum 27, like this, the whole circumference of the resin bed 21-2 of the part of resinous coat metal tube 21 to be burnt will be burnt.
In addition, the device of the 5th embodiment shown in Figure 10 has shown the device of following type, wherein by using Perimeter Truss Reflector 28 to replace dish type speculum 27 to use laser beam 22-1 to remove resin bed 21-2.Structure is configured to laser irradiation device 22 and is arranged on the axis of the resinous coat metal tube 21 that is clamped by removable anchor clamps 23, and Perimeter Truss Reflector 28 is arranged between laser irradiation device 22 and the resinous coat metal tube 21.Rotate laser beam 22-1 by laser irradiation device 22 with respect to the metal tube that does not rotate 21 that is clamped by removable anchor clamps 23, thereby laser beam 22-1 is reflected on the Perimeter Truss Reflector 28 to scan, and the resin bed 21-2 on the part of resinous coat metal tube 21 to be burnt like this will be burnt.
According to the device among each above-mentioned embodiment, resin bed can be removed fully and can not stayed any portion or any burr do not removed.In addition, the method according to this invention uses the edge of the resin bed 21-2 that laser beam 22-1 removes can be shone by laser beam 22-1 again, as shown in figure 11, thereby with the marginal portion fusion of resin bed be welded on the metal tube 21.Therefore can improve the sealing property between metal tube 21-1 and the resin bed 21-2, and prevent fully between liquid intrusion metal tube 21-1 and the resin bed 21-2.
As shown in figure 12, according to the present invention, laser treatment of the present invention unit 35 is assembled together with automatic pipe fitting production line, and this production line comprises inclined tube 30, pipe fitting supply unit 31, terminal processes unit 32, pipe fitting feed unit 33 and pipe fitting transfer gantry 34.Therefore, when by pipe fitting supply unit 31 when input side transmits resinous coat metal tube 21 continuously, be cut into regular length and the resin bed from an end of the resinous coat metal tube 21 of inclined tube 30 feedings will be removed by laser treatment unit 35.Then, the terminal plastic working is carried out in the same side of resinous coat metal tube 21.Pipe fitting feed unit 33 moves in the axial direction and when outlet side was carried continuously by pipe fitting supply unit 31, the resin bed of another pipe end of resinous coat metal tube 21 was removed by the laser treatment unit when resinous coat metal tube 21 passes through.Resinous coat metal tube 21 carries out the terminal plastic working by the terminal processes unit on the same side 32 on this side, and can be shifted out by pipe fitting transfer gantry 34.
Therefore, according to the present invention, laser machining device is combined in the above-mentioned automatic pipe fitting production line, and when carrying pipe fitting continuously by the auto-feed unit, this production line carries out plastic working to the end of pipe fitting.Therefore, only need to be transported in the above-mentioned production line by the resinous coat metal tube that will cut into certain-length, just can carry out the removal of above-mentioned resinous coat metal tube resin bed continuously and carry out the terminal plastic working, for example enlarging or operating winding, thus reduce production costs.
At this, much less, in the independent above-mentioned embodiment that describes as Fig. 4-9 and show, also can adopt the rotary motion mechanism of tooth rest mechanism as resinous coat metal tube 21.When resin bed was burnt, also much less the output quantity of laser beam can be adjusted according to the thickness of film and the material of resin bed, and surface-treated layer of the bottom of resinous coat metal tube, coating and metal tube or the like can not sustain damage like this.Description is to make as an example by the resinous coat metal tube that will have the single-layer resin layer.For the resinous coat metal tube with multi-layer resinous layer, when only the superiors being burnt, much less the output quantity of laser beam also can be done similar adjustment, thereby can not be damaged to following resin bed.
Industrial applicibility
The present invention can not only be used for the resin bed on oil pressure pipe fitting, combustion gas pipe fitting and the gas pipe fitting of automobile In the removal, and can also be for the dissimilar resin-coated metal tube spare in other field.
Claims (11)
1, a kind of method of removing the resin bed of resinous coat metal tube, wherein, use laser beam that resin bed is removed from the resinous coat metal tube, this resinous coat metal tube has the metal tube that scribbles described resin bed on its excircle, wherein by the cross sectional shape that described laser beam gathered to become a bit rather than make described laser beam described resin bed metal tube axially on scatter and burn described resin bed in the preset range.
2, the method for the resin bed of removal resinous coat metal tube according to claim 1 is characterized in that: by making the laser beam that is focused into any carry out palisade scanning on vertical and horizontal the resin bed of preset range is burnt with piece shape.
3, the method for the resin bed of removal resinous coat metal tube according to claim 2 is characterized in that: by repeating to implement the palisade scan operation resin bed of preset range is burnt with a plurality of shapes.
4, the method for the resin bed of removal resinous coat metal tube according to claim 1, it is characterized in that: as using laser beam to shine the method that described resin bed is burnt described resin bed, when fixing resin coating metal pipe, carry out the irradiation of first laser beam, after the irradiation of finishing predetermined length, by resinous coat metal tube or laser irradiation device are rotated the resin bed that a predetermined angular also is fixed then and uses the laser beam irradiation to be left.
5, the method for the resin bed of removal resinous coat metal tube according to claim 1 is characterized in that: as using laser beam to shine the method that described resin bed is burnt described resin bed, burn described resin bed with a plurality of laser irradiation devices.
6, the method for the resin bed of removal resinous coat metal tube according to claim 1 is characterized in that: use to rotate metal tube and the method for fixed laser irradiation unit as using laser beam to shine the method that described resin bed is burnt described resin bed.
7, the method for the resin bed of removal resinous coat metal tube according to claim 1 is characterized in that: use to rotate laser irradiation device and the method for fixing metal pipe as using laser beam to shine the method that described resin bed is burnt described resin bed.
8, according to the method for the resin bed of claim 6 or 7 described removal resinous coat metal tubes, it is characterized in that: when using laser beam to shine described resin bed to burn described resin bed, will be directed on the described resin bed by changing the laser irradiating angle with making laser beam zigzag or spirality.
9, the method for the resin bed of removal resinous coat metal tube according to claim 6 is characterized in that: when using laser beam to shine described resin bed to burn described resin bed, with the speculum described laser beam that leads.
10, the method for the resin bed of removal resinous coat metal tube according to claim 6, it is characterized in that: in described resin bed removal method, shone by laser beam and after burning, the edge of the resin bed of removing is shone once more with the end by fusion or welding resin layer by laser beam it is sealed at described resin bed.
11, the method for the resin bed of removal resinous coat metal tube according to claim 1, it is characterized in that: said method is bonded in the automatic pipe fitting production line, and this production line carries out plastic working to the end of this pipe fitting when transmitting described pipe fitting continuously with the auto-feed unit.
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| JP2004007383 | 2004-01-14 | ||
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| JP2004378692 | 2004-12-28 |
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| CNB2005100788913A Active CN100455397C (en) | 2004-01-14 | 2005-01-14 | Method for removing resin layer from resin-coated metal tube |
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| CN101332541B (en) * | 2008-08-06 | 2011-09-07 | 中国航空工业第一集团公司北京航空制造工程研究所 | Short burst laser cleaning method of metal surface |
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| US4671848A (en) * | 1984-12-17 | 1987-06-09 | General Laser, Inc. | Method for laser-induced removal of a surface coating |
| FR2641718B1 (en) * | 1989-01-17 | 1992-03-20 | Ardt | METHOD FOR CLEANING THE SURFACE OF SOLID MATERIALS AND DEVICE FOR CARRYING OUT THIS METHOD, USING A PULSE PULSE LASER, SHORT PULSES, OF WHICH THE BEAM FOCUSES ON THE SURFACE TO BE CLEANED |
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| US6130404A (en) * | 1997-03-03 | 2000-10-10 | Itt Automotive, Inc. | Electro-optical removal of plastic layer bonded to a metal tube |
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