CN101678508B - Laser working method for piece with edge - Google Patents
Laser working method for piece with edge Download PDFInfo
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- CN101678508B CN101678508B CN2008800196575A CN200880019657A CN101678508B CN 101678508 B CN101678508 B CN 101678508B CN 2008800196575 A CN2008800196575 A CN 2008800196575A CN 200880019657 A CN200880019657 A CN 200880019657A CN 101678508 B CN101678508 B CN 101678508B
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- hole
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/142—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor for the removal of by-products
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/16—Removal of by-products, e.g. particles or vapours produced during treatment of a workpiece
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
- B23K26/3568—Modifying rugosity
- B23K26/3576—Diminishing rugosity, e.g. grinding; Polishing; Smoothing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
- B23K26/382—Removing material by boring or cutting by boring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/10—Pipe-lines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
Disclosed is a laser working method for a member having an edge. The method is applied to a member having an edge and a protrusion formed at the edge region. The method irradiates both such one of the two faces intersecting across the edge as has that protrusion and the edge region with a laser beam, thereby to melt the edge region, and moves the molten portion to the other face. This laser working method can be properly applied to an oil ring, which has right and left rail portions, and a web portion connecting the rail portions. The web portion has a plurality of through holes formed by melting it, and a remolten solid sticks to the wall faces of the through holes, but no protrusion exists as the molten solid on the outer surface of the web portion.
Description
Technical field
The laser processing of the parts that the present invention relates to utilize laser ablation to be formed on the thrust on the parts and by the oil ring wire rod of this laser processing processing.
Background technology
If parts are processed, then a part of edge region of the parts of Qu Chuing (at this, so-called fringe region is represented the edge and comprised near its part) is remaining is overshooting shape.For example, when offering through hole at flat parts irradiating laser, though the ejection assist gas removes molten mass or vaporized gas, but molten mass dispersed to coplanar laser illumination (surface) side as the sputter thing before the hole is connected, and after perforation, go out by face (back side) effluent to laser as scum silica frost, be attached to the open circumferential of through hole.Form optimization by the expulsion pressure with assist gas, can prevent the degree that being attached to of sputter thing or scum silica frost is suitable, but the pressure that this pressure may not be best suited for concerning through hole processing, and be difficult to stipulate be difficult to suitable air pressure such as material, thickness corresponding to parts sputter thing or scum silica frost are adhered to.And, prevent that agent also has certain effect though adhere at parts surface coating sputter thing or scum silica frost, still be difficult to say so to prevent fully.
Therefore, consider to have to add at through hole and allow that sputter thing or scum silica frost adhere to and in the technology of after this removing, for example disclose this technology in patent documentation 1,2,3 man-hour.
Laser processing in the patent documentation 1 is shown in Fig. 9 A, Fig. 9 B.Patent documentation 1 discloses following technological thought, and it comprises: shown in Fig. 9 A, and with respect to the working position of processing object thing, the manufacturing procedure that irradiating laser and assist gas are processed; Shown in Fig. 9 B, in order to remove the scum silica frost of described working position, shine the scum silica frost that described laser and assist gas scum to described working position again and remove operation.The purpose of this technology is to improve the precision of machining shape, and technology is characterised in that blows that to fly and remove at machined surface be the scum silica frost that the sidewall in hole adheres to.
In addition, laser cutting method in the patent documentation 2 is at irradiating laser and after boring a hole, be the method that starting point is carried out laser cutting with this hole, this method has following technical characterictic, that is, before laser cutting, make laser make the slag fusion on every side that when perforation, is attached to the hole to the scope irradiation on every side that comprises the hole, and blow by the gas that injection has high pressure and a low oxidative and to fly this slag, thereby from the surface of steel plate it is removed.
In addition, laser processing in the patent documentation 3 has following technical characterictic, namely, at the processed part irradiating laser of object and after processing, to the neighboring area irradiating laser that comprises processed part and heat, make the attachment fusion that is constituted by near the sublimate that is attached to the processed part, and integrated with the base material of workpiece, this laser processing in the cutting of glass effectively.
Patent documentation 1: TOHKEMY 2003-285191 communique (paragraph 0021～0022)
Patent documentation 2: TOHKEMY 2001-321975 communique (paragraph 0008～0009)
Patent documentation 3: TOHKEMY 2004-25228 communique (paragraph 0010～0011)
Summary of the invention
For example during the parts after overlap using processing, must make that the coincidence surface of parts is not remaining a thrust.In patent documentation 1, though can remove the scum silica frost that is attached to the hole sidewall, can't remove the scum silica frost at the back side of the opposition side that is attached to the laser entrance face side.Grind and can remove though utilize, need the operation of another operation fully, not only efficient is not high, and because the whole face in the back side is removed amount of grinding, therefore careful choosing.
In addition, in patent documentation 2, though make the slag fusion that is attached to the surface, and blow with gases at high pressure and to fly, even but slag is removed from the hole periphery, also might be attached to another position on surface again or be attached to the back side by the hole, aspect surface or back side removal thrust, lack reliability.And, in patent documentation 3, though make its effect of dissolving in base material when utilizing as sublimate with respect to attachment to microbody, do not consider with respect to the effect as the thrust of flash or the formation of drossy edge region.
So, the objective of the invention is to, the thrust that provides an a kind of side's with this fringe region in having the parts at edge face to form utilizes laser to form molten mass, and makes its laser processing that moves to the opposing party's face and by the oil ring wire rod of this laser processing processing.
According to main points of view of the present invention, provide following laser processing.
A kind of laser processing with the parts at edge, it is characterized in that, have that edge and edge region have the clipping described edge of parts of thrust and in two faces intersecting, a side's who exists to described thrust face and described fringe region irradiating laser, make described thrust and described fringe region fusion, and the molten mass that makes generation moves to the opposing party's face.
Described molten mass can utilize gravity to move.
Described molten mass also can utilize the kinergety of assist gas to move.
In laser processing of the present invention, preferably form the through hole perforation process of through hole by the surface irradiation laser towards parts, obtain having the parts that edge and edge region are formed with thrust.
Preferably the energy density of the laser that shines in the formation of described molten mass is littler than the energy density of the laser that shines in the through hole perforation process.
Preferably the setting pressure of the assist gas that uses for described molten mass is moved is lower than the setting pressure of the assist gas that uses in the through hole perforation process.
As application examples, laser processing of the present invention can be applicable in the processing of oil ring wire rod.The linking part of the orbit portion about oil ring wire rod has and this orbit portion of binding by being suitable for method of the present invention, utilizes described through hole perforation process to be formed with through hole at described linking part.
According to other viewpoint of the present invention, provide following oil ring wire rod.
In the oil ring wire rod of the linking part of the orbit portion about having and this orbit portion of binding, described linking part has a plurality of through holes that the fusion of utilizing forms, wall at described through hole is attached with the cakey melting and solidification again of molten mass thing, does not have the jut that is formed by molten mass at the outer surface of described linking part.
According to an optimal way of oil ring wire rod of the present invention, molten mass forms recess or chamfering shape to the fringe region that the through hole wall moves a side.
The invention effect
According to the present invention, owing to can not make the thrust of a side's who is formed on fringe region face be attached to the processed parts back side of opposition side of the coplanar laser illumination of processed parts, and move to the opposing party's face, therefore can reduce the influence of the thrust that is formed on processed parts.
Description of drawings
Figure 1A is the schematic diagram that one embodiment of the invention are shown, and is the profile (embodiment 1) along the axis of through hole with metal plate of through hole.
Figure 1B is the schematic plan (embodiment 1) of the metal plate shown in Figure 1A.
Fig. 2 is the schematic cross sectional view (embodiment 1) that is illustrated in the flow condition of the thrust that the intake section of the through hole among Figure 1A, Figure 1B exists.
Fig. 3 is the schematic diagram that one embodiment of the invention are shown, and is the schematic cross sectional view (embodiment 2) along the axis of through hole with metal plate of through hole.
Fig. 4 is the schematic cross sectional view that the formation example of the through hole with the thrust among the embodiment 1,2 is described.
Fig. 5 A is illustrated in the schematic diagram that machined object forms one embodiment of the invention of a plurality of through holes, is the profile (embodiment 3) along the axis of through hole.
Fig. 5 B illustrates the thrust that exists for the intake section that makes the through hole in Fig. 5 A uses the state of assist gas in laser irradiation current downflow schematic cross sectional view (embodiment 3).
Fig. 6 A is the schematic cross sectional view (embodiment 3) that the alternative shown in Fig. 5 A is shown.
Fig. 6 B illustrates the thrust that exists for the intake section that makes the through hole in Fig. 6 A uses the state of assist gas in laser irradiation current downflow schematic cross sectional view (embodiment 3).
Fig. 7 A utilizes laser to be radiated at the schematic plan that forms the state of groove or cutting part on the machined object as example of the present invention.
Fig. 7 B illustrates to make thrust that the ora terminalis at the groove shown in Fig. 7 A or cutting part partly exists in the schematic plan of the state of mobile laser irradiation current downflow.
Fig. 8 A is the profile that the shape of cross section of the oil ring wire rod that uses in test is shown.
Fig. 8 B is the vertical view of the oil ring wire rod shown in Fig. 8 A.
Fig. 9 A illustrates the schematic cross sectional view that forms the patent documentation 1 disclosed technology formerly of through hole to the machined object irradiating laser.
Fig. 9 B illustrates to make thrust that the ora terminalis at the through hole that forms by the technology shown in Fig. 9 A exists in the schematic cross sectional view based on the state of the laser irradiation current downflow of prior art.
Figure 10 is the outward appearance photo of an example of the oil ring wire rod behind the through hole perforation process that illustrates among the embodiment 3.
Figure 11 is the outward appearance photo that an example of the oil ring wire rod of the present invention among the embodiment 3 is shown.
Figure 12 is the outward appearance photo that an example of the oil ring wire rod of the present invention among the embodiment 3 is shown.
Figure 13 is the microstructure photo of an example that the through hole cross section of the oil ring wire rod of the present invention among the embodiment 3 is shown.
Label declaration
10,20 machined objects
15,35,45 thrust fusion laser
25 through holes form uses laser
16,36,46 fusion thrusts flow and use assist gas
26 through holes form uses assist gas
13 flashes
23 scum silica frost
11,21,31 through holes
37 grooves
12,22,42 edges
The A thrust does not form face
The B thrust forms side (thrust is removed the object face)
C through hole wall
The thickness of 51 linking parts
The width of 52 through holes
The length of 53 through holes
The spacing of 54 through holes
The width of 55 oil ring wire rods
The thickness of 56 oil ring wire rods
The tabular surface width of 57 linking parts
58 through holes
The specific embodiment
Embodiment 1
In the present embodiment, by processing such as hole processing, groove processing, cutting processing, form the edge at machined object, and produce the parts of thrust with respect to edge region, the thrust that the face of a side in folded two sides, edge is produced by irradiating laser forms molten mass, and this molten mass is moved to the opposing party's face.If processing be Laser Processing then described thrust be scum silica frost, if machining then described thrust be flash (being also referred to as overlap).Below, be that example describes with the situation of removing the flash that when utilizing the machining through hole, produces.
As shown in Figure 4, if for example with respect to the A face of metal plate 10, rectangular feeding drill bit roughly, processing through hole 11, then on as near the B face the edge 12 of the B face opening of opposing face, flash 13 forms in the mode of expanding.If flash 13 is outstanding at the B face, then there is the operator to cut anxiety in one's hands, not only dangerous, and when should flat board 10 using or using as the parts of laminates as the parts of assembly, can't correctly assemble.If the number of through hole 11 is few, then can remove flash 13 by handwork utilization file, but efficient is low for a long time at the number of through hole, thereby can be suitable for can automation the present invention.
As shown in Figure 1 and Figure 2, in the present embodiment, it is last making the flash 13 outstanding B face sides of metal plate (hereinafter referred to as base material) 10, shines towards the B face by making laser 15, making from the outstanding flash 13 of B face becomes molten mass 13a, and molten mass 13a is moved along the wall C of through hole 11.Laser 15 forms the spot diameter of the scope that comprises flash 13 expansions, shines centered by through hole 11.Laser 15 so that energy density and the time of flash 13 fusions shine.Flash 13 is because thermal capacity is little, therefore heated by the short time and becomes and have mobile molten mass 13a.
In addition, if the irradiation by laser 15, edge 12 becomes high temperature, the skin section fusion, and then molten mass 13a is absorbed by the molten mass of fringe region and becomes one, expands thinly along the wall C of through hole 11.The molten mass that this is integrated is mobile high, as shown in Figure 2, moves along the wall C of through hole 11, cools off along with thermograde, and C firmly is combined with wall.That is, the wall C because flash 13 becomes molten mass 13a to through hole 11 moves, and therefore regards that thrust disappears from the B face as.In addition, because the part of the molten mass at edge 12 moves to wall C together, so fringe region becomes recess or chamfering shape.
Laser processing of the present invention needs only the face and the area illumination laser that comprises described fringe region to a side of thrust formation, and is comparatively easy.And, according to the present invention, carry out hole processing or groove processing, cutting processing etc. by Laser Processing after, can continue to utilize Laser Processing to carry out the removal of thrust, can effectively process.
Embodiment 2
Embodiment 1 is the becoming one of molten mass that makes flash and the edge 12 of fusion, and the embodiment that utilizes gravity to make them to move along the wall of through hole, though be the example that does not use special assist gas, but be to use the kinergety of fluid, the flash that can make fusion moves along the wall of through hole.In present embodiment 2, as shown in Figure 3, adopt laser 15 is shone towards the B of base material 10 face, and with the method for assist gas 16 towards the injection of B face.At this, roughly the same with the situation among the embodiment 1 about laser 15, at least so that energy density and the time of flash 13 fusions shine.In present embodiment 2, moved in the mode that washes away by the face of assist gas to the opposing party owing to comprise near edge 12 molten masses of thrust molten mass at least, therefore remove thrust from a side face.
As shown in Figure 3, assist gas 16 comprises that the scope that is formed with flash 13 is along through hole 11 irradiations.Assist gas 16 preferably becomes the low-pressure that makes the degree that the molten mass 13a based on laser 15 can move on substrate surface B, makes molten mass 13a mobile thinly with expanding, does not fly molten mass 13a but do not blow.If molten mass 13a is blown and is flown, then disperse and be attached to other position to the B face side of base material 10, perhaps disperse to the A face side of base material 10 by through hole 11 and adhere to, therefore careful choosing.
The pressure that assist gas 16 is preferably set with the size of the size that meets flash, material, through hole, length etc. from the nozzle of for example tapered or speed are towards through hole 11 irradiations.And, in the present invention, owing to utilize the kinergety of assist gas to make molten mass ground as washing away mobile, therefore, the configuration freedom of parts.And if the thrust fusion, then edge 12 also can fusion.
Has mobile degree if utilize laser 15 that flash 13 is molten to, then molten mass 13a moves to through hole 11 wall C directions, and move when through hole wall C expands through edge 12, cooling off and solidify along with the thermograde of wall C, C firmly is combined with wall.At this moment, if also fusion of fringe region is then identical with embodiment 1, molten mass 13a is absorbed and mobile the raising by the fringe region molten mass, and diffusion widely, and is therefore preferred.If the temperature of fringe region is elevated to the moistening degree of molten mass 13a, then molten mass 13a can move to through hole 11 directions on edge 12, so edge 12 also can fusion.In this case, by output or the shortening irradiation time that reduces laser 15, can reduce " sagging " at edge 12.
The injection of assist gas 16 opportunity needn't be consistent with the irradiation opportunity of laser 15, also can set respectively.For example, also can when flash 13 fusions, make the injection beginning of assist gas, after the irradiation of laser 15 stops, also can making assist gas carry out flowing of short time slightly again.In the present embodiment owing to utilize the kinergety of fluid that molten mass is moved, therefore can not will base material 10 be set at B and face up, can make the B face for down, towards laterally or be lateral attitude.The direction of illumination of laser and the injection direction of assist gas roughly meet right angle orientation with respect to the B face and get final product.And, by the pressure of assist gas or speed etc. are adjusted in the scope of not blowing the flash 13a that flies fusion, the flash adhering zone in can controlling in the through hole 11.
Embodiment 3
Present embodiment 3 is applicable to the through hole perforation process that utilizes Laser Processing that the through hole of machined object is bored a hole, and further utilizes Laser Processing that consequent thrust is moved along the through hole wall.At this, be object with the scum silica frost as thrust, be suitable for for example processing a plurality of path through holes and with the automated system of scum silica frost from machined object surface removal and so on.
Shown in Fig. 5 A, in laser processing of the present invention, by to A face (lower surface) irradiating laser 25 of machined object 20 and spray the through hole perforation process that assist gas 26 forms through hole 21, obtain having the parts that edge and edge region are formed with thrust.Shown in Fig. 5 B, preferably to the area illumination laser 35 at the edge 22 of the through hole 21 of B face (upper surface) opening that is included in machined object 20 and spray assist gas 36, near the scum silica frost 23 of the B face formation the edge 22 of described through hole 21 is moved along wall C.
In the through hole perforation process, laser 25 becomes the spot diameter with the roughly the same diameter of through hole 21 diameters that should bore a hole, and becomes the energy density of machined object 20 fusions that make spot area, shines towards the A of machined object face.Assist gas 26, and forms and blows the kinergety that flies molten mass spraying with the roughly the same scope of the spot diameter of laser 25 towards the A of machined object 20 face.Thus, though being formed with the molten mass of through hole 21 disperses to the A face side of machined object 20 as the sputter thing, but prevent agent by adhering at the surface of machined object 20 coating sputter in advance thing, perhaps at laser head the sputter thing is set and reclaims the dust shield of usefulness and carry out vacuum attraction etc., thereby can prevent that the sputter thing from adhering to the A face side of machined object 20.
If be formed with through hole 21, then molten mass is discharged to B face side by through hole 21, is attached to edge 22 as scum silica frost.
The technology that the formation use of molten mass and the above embodiments 2 are identical.That is, laser 35 is formed the spot diameter of the size of the adhering zone that comprises the scum silica frost 23 that is attached to the B face, and so that the thermal energy of scum silica frost 23 fusions of B face shine towards the B of machined object 20 face.At this, the energy density of the shadow surface of machined object 20 is preferably than the low energy density of energy density in the described through hole perforation process.In addition, under the situation of the sag of chain that will reduce edge 22, can reduce the energy density of laser 35.
Assist gas 36 forms the kinergety that the scum silica frost 23 that makes fusion can move on the B face, and from the scope of the scum silica frost adhering zone that comprises the B face towards through hole 21 irradiations.
In addition, the kinergety of assist gas 36 is preferably than the little energy of kinergety in the described through hole perforation process, for example by making setting pressure lower and can reduce kinergety than the setting pressure in the through hole perforation process.In addition, when making scum silica frost 23 fusions that are attached to the B face, usually, owing to be attached to the also fusion of scum silica frost of through hole wall C, and the melt surface at edge 22, at least make the fusion scum silica frost be elevated to moistening required enough temperature, so the scum silica frost 23 of the B face of fusion move and cooled and solidified easily to wall C.
As mentioned above, laser 35 and assist gas 36 in the formation of molten mass are preferred, compare with the through hole perforation process, the spray regime of the energy density of laser, spot diameter and assist gas, kinergety difference, and towards the opposition side of through hole perforation process towards the machined object irradiation and spray, also can wait to construct laser process equipment according to the form of machined object, the specification of through hole.For example, be the sheet material of horn shape or toroidal and through hole be formed in the prescribed limit on plane as if machined object, then preferably use the common laser machine of Yan San Shaft direction control laser head or workpiece setting table.At this moment, at first, sum to through hole in the through hole perforation process is bored a hole, next, upset also arranges machined object, adjust the energy of laser and pressure and the nozzle location of focal position and assist gas, can make scum silica frost carry out movement with respect to all through holes by forming molten mass.
In addition, if machined object is strip member and forms through hole along parts, then be that following system gets final product, namely, make machined object mobile shown in the arrow among Fig. 5 A, Fig. 5 B, along this mobile route, set gradually laser and the assist gas irradiation that the through hole perforation process uses and spray with the laser of the formation usefulness of position and molten mass and assist gas irradiation and injection and use the position.In this case, the irradiation of the laser of the formation of through hole perforation process and molten mass and assist gas and injection direction also can be the form shown in Fig. 6 A, Fig. 6 B except shown in Fig. 5 A, Fig. 5 B.Shown in Fig. 5 B, if will be used in the laser of formation of molten mass and assist gas irradiation and injection direction forms downwards, then can in removing, scum silica frost utilize the effect of gravity, therefore can further reduce the pressure of assist gas or shorten the removal time, and can be suitable for the technology of the embodiment 1 that does not use special assist gas, therefore preferred.
In described embodiment 1,2,3, the through hole of the diameter littler than the spot diameter of the laser that molten mass is moved to the through hole wall has been described, but groove processing and cutting processing are equivalent to carry out continuously the processing of through hole perforation operation, and the present invention can be suitable for equally.For example, the molten mass formation technology of embodiment 1,2 technology or embodiment 3 is carried out following being suitable for and is got final product, namely, shown in Fig. 7 A, with respect to the groove 37 that has with the diameter same widths of through hole 31, to the scope irradiating laser 35 that comprises well width and injection assist gas 36, and laser 35 and assist gas 36 are relatively moved with respect to the length direction of machined object along groove.
In addition, also can be shown in Fig. 7 B, with respect to the cutting part 47 bigger than through hole diameter, to the scope irradiating laser 45 that comprises cut edge 42 and spray assist gas 46, and make laser 45 and assist gas 46 42 relatively move and get final product along the cut edge with respect to machined object.And the laser that is used for the removal thrust may not shine with the approximate right angle direction with respect to the B face as mentioned above, also can also can carry out the irradiation of general horizontal direction with respect to the cut edge of base material end from oblique direction.And the material of object parts is not limited to metal, also can be pottery, resin etc.
Orbit portion about having as the suitable parts of the processing object thing that is suitable for laser processing of the present invention and link the linking part of this orbit portion, described linking part is the oil ring wire rod that is formed with through hole in described through hole perforation process.Especially, the stainless steel oil ring wire rod that in quality %, preferably contains 8～25% Cr.
When the parts among the present invention are applicable to oil ring wire rod, form for example shape shown in Fig. 8 A, Fig. 8 B.At this moment, in representational cun method, for example the thickness 51 of linking part is below the 0.5mm, and the width 52 that is formed on the through hole of linking part is that the spacing 54 of 0.5～1.2mm, through hole is 3～10mm for the length 53 of 0.3mm～0.7mm, through hole.
Test
Based on described embodiment 3, at first, utilize Laser Processing to bore a hole the continuously Long Circle through hole of a plurality of oil circulation usefulness of mobile continuously stainless steel oil ring wire rod, this stainless steel oil ring wire rod has in quality % C:0.5%, Si:0.2%, Mn:0.3%, Cr:10%, all the other are by forming that Fe and inevitable impurity constitute.Next, the processing that utilizes Laser Processing that molten mass is moved to the through hole wall.Shown in Fig. 8 A, be following wire rod as the oil ring wire rod of object: cross section is the H word shape roughly, and the interorbital width 55 in the left and right sides is that 1.5mm, thickness 56 are 0.4mm for the tabular surface width 57 of the linking part of 1.5mm, connecting orbit portion for 1mm, thickness 51.And, shown in Fig. 8 B, be that in series to form Laser Processing width 52 be that 0.5mm, length 53 are the slotted hole shape through hole 58 of 0.8mm to 10mm at linking part with spacing 54.
Laser process equipment is identical with above-mentioned equipment shown in Figure 5, and the through hole perforation process is used with the laser process equipment of the formation usefulness of the molten mass mobile straight line along oil ring wire rod and is set to connect.Below, similar key element is used same numeral, describe based on Fig. 5 A, Fig. 5 B.
Oil ring wire rod 20 moves with link surface attitude along the vertical direction, and A face, B face among Fig. 5 A, Fig. 5 B are corresponding with the two sides of linking part.In the through hole perforation process, identical with explanation among Fig. 5 A, the pulsed YAG laser 25 that makes output 4.5KW from the below of oil ring wire rod 20 towards linking part face A so that focus is shone with the about 0.45mm of spot diameter with the mode that the intermediate point of A face and B face overlaps, and the nitrogen 26 of expulsion pressure 0.7MPa is worn and is penetrated through hole 21 as assist gas.In addition, wear at through hole and to penetrate the hole that forms regulation cun method after wearing the hole of having penetrated path in the operation, that is, carry out two stage perforation.At this moment, through hole 21 forms narrow shape from the A face towards the B face, and scum silica frost 23 is attached to the edge 22 of B face side with being the many places point-like.An example of the through hole outward appearance of the oil ring wire rod that is attached with scum silica frost behind the through hole perforation process shown in Figure 10.
In the formation of molten mass, identical with the explanation among Fig. 5 B, the pulsed YAG laser 35 that makes output 1.5KW, and shines with mode and the decrease of power density that laser comprises through hole and periphery thereof towards link surface B, defocus in the mode that forms the about 0.6mm of spot diameter at the B face from the top of oil ring wire rod.And, as assist gas 36, nitrogen is sprayed to the laser range of exposures with the pressure lower than the pressure in the through hole perforation process.Specifically, change setting pressure into 0.01MPa, 0.03MPa, 0.05MPa, 0.1MPa spray, and observe the removal state of scum silica frost 23.In addition, under the situation of not spraying assist gas 36, also observe the removal state of scum silica frost 23.
In the oil ring wire rod 20 of the formation of having carried out above-mentioned molten mass, under the pressure of any assist gas 36, the scum silica frost 23 that forms behind the through hole perforation process is all roughly gone up from linking part face B and is moved to through hole 21 wall C, and the roughly complete cycle that scum silica frost spreads all over through hole 21 wall C adheres to.If observe the attachment state of the solidifying body in the through hole 21, following tendency is then arranged, that is, the pressure of assist gas 36 is more high, and scum silica frost to the below that arrives through hole wall C is adhered to widely, and the fringe region of the B face side of through hole 21 is just more deep-cut.In addition, when the pressure of assist gas 36 is 0.1MPa, though smallly can observe the solidifying body that is attached on the link surface A, can think that pressure is too high a bit.
Under the situation of not spraying assist gas 36, scum silica frost is trapped near the B face of through hole wall C basically.
Suitable example of the present invention is shown in Figure 11 (photo).As shown in figure 11, can confirm the scum silica frost that around the through hole of oil ring wire rod, adheres to owing to the irradiation fusion of laser becomes the chamfering shape, and the situation that scum silica frost does not come off.
As other suitable example of the present invention, be that the assist gas 36 of 0.03MPa sprays simultaneously with pulsed YAG laser 35 and the pressure of output 0.7KW, the processing that scum silica frost is moved along the wall of through hole.
An example of the outward appearance photo of oil ring wire rod of the present invention shown in Figure 12.As shown in figure 12, can confirm at the scum silica frost that adheres to around the through hole of oil ring wire rod because the laser irradiation in the formation of molten mass and fusion and form the chamfering shape, and the situation that scum silica frost does not come off.
An example of the microstructure photo in the cross section of through hole shown in Figure 13.As shown in figure 13, can confirm that scum silica frost moves along the wall of fusion through hole, and the situation that scum silica frost does not come off.Thus, can access optimal wire rod as oil ring wire rod.
Commercial viability
Laser processing of the present invention is the technology that the state to the edge that produces in the various processing of the various parts that comprise mechanical part such as oil ring for internal combustion engine improves, and can utilize the laser irradiation to remove the thrust that is present in fringe region.
Claims (7)
1. laser processing with the parts at edge, wherein,
Having that edge and edge region have the clipping described edge of parts of thrust in these two faces of face of the side's that the described thrust that intersects exists face and the opposing party, a described side's who exists to described thrust face and described fringe region irradiating laser, make described thrust and described fringe region fusion, and make the molten mass of generation do not blown the face of enclave to described the opposing party to move.
2. the laser processing with the parts at edge according to claim 1, wherein,
The gravity that moves through of described molten mass carries out.
3. the laser processing with the parts at edge according to claim 1, wherein,
The assist gas that moves through of described molten mass carries out.
4. according to each described laser processing with the parts at edge in the claim 1～3, wherein,
Form the through hole perforation process of through hole by the surface irradiation laser towards described parts, make and have the described parts that edge and edge region have thrust.
5. the laser processing with the parts at edge according to claim 4, wherein,
The energy density of the laser that shines in order to form described molten mass is lower than the energy density of the laser that shines in described through hole perforation process.
6. the laser processing with the parts at edge according to claim 4, wherein,
The setting pressure of the assist gas that uses for described molten mass is moved is lower than the setting pressure of the assist gas that uses in described through hole perforation process.
7. the laser processing with the parts at edge according to claim 4, wherein,
Described parts are the orbit portion about having and the oil ring wire rod that links the linking part of this orbit portion, in described through hole perforation process, form described through hole at described linking part.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007154000 | 2007-06-11 | ||
| JP154000/2007 | 2007-06-11 | ||
| PCT/JP2008/060617 WO2008153028A1 (en) | 2007-06-11 | 2008-06-10 | Laser working method, and oil ring wire rod |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110386485.9A Division CN102506173B (en) | 2007-06-11 | 2008-06-10 | Oil ring wire rod |
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| CN101678508B true CN101678508B (en) | 2013-07-17 |
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| CN2008800196575A Active CN101678508B (en) | 2007-06-11 | 2008-06-10 | Laser working method for piece with edge |
| CN201110386485.9A Active CN102506173B (en) | 2007-06-11 | 2008-06-10 | Oil ring wire rod |
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| JP (1) | JP4983918B2 (en) |
| KR (1) | KR101169981B1 (en) |
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| DE102018001396B4 (en) * | 2018-02-22 | 2019-10-10 | Superior Industries Production Germany GmbH | Method and device for rounding an undesired burr and / or unwanted material accumulation on the back edges of spokes of a light metal wheel for a vehicle in the process of its manufacture |
| JP6868316B1 (en) * | 2019-07-29 | 2021-05-12 | 有限会社中島精工 | Corner shaping device and corner shaping method |
| CN112188740B (en) * | 2020-10-13 | 2021-12-07 | 安捷利（番禺）电子实业有限公司 | Drilling method for 5G high-frequency MPI material |
| CN115356807B (en) * | 2022-09-23 | 2023-10-27 | 中国科学院微电子研究所 | Manufacturing method and manufacturing equipment for chamfering optical fiber holes |
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| CN1319879A (en) * | 2000-03-30 | 2001-10-31 | 三洋电机株式会社 | Semiconductor device and making method thereof |
| CN1701894A (en) * | 2004-05-26 | 2005-11-30 | 山崎马扎克公司 | Burr removal apparatus for laser beam machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH09159025A (en) * | 1995-12-08 | 1997-06-17 | Hitachi Metals Ltd | Through hole boring method for deformed wire member with groove for ol ring in internal combustion engine |
| JPH11320171A (en) * | 1998-05-13 | 1999-11-24 | Matsushita Electric Ind Co Ltd | Method and device for boring by laser irradiation |
| JP2001219285A (en) * | 2000-02-10 | 2001-08-14 | Nippon Steel Corp | Laser beam cutting method of steel material |
| DE60210770T2 (en) * | 2001-03-22 | 2006-08-31 | Xsil Technology Ltd. | A LASER PROCESSING SYSTEM AND METHOD |
| WO2006132229A1 (en) * | 2005-06-07 | 2006-12-14 | Nissan Tanaka Corporation | Laser piercing method and machining equipment |
| JP2007057008A (en) * | 2005-08-25 | 2007-03-08 | Hitachi Metals Ltd | Method for manufacturing cross-sectionally deformed wire-rod pierced with through-hole |
| JP2007278401A (en) * | 2006-04-07 | 2007-10-25 | Hitachi Metals Ltd | Oil ring wire rod manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319879A (en) * | 2000-03-30 | 2001-10-31 | 三洋电机株式会社 | Semiconductor device and making method thereof |
| CN1701894A (en) * | 2004-05-26 | 2005-11-30 | 山崎马扎克公司 | Burr removal apparatus for laser beam machine |
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| Publication number | Publication date |
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| CN102506173A (en) | 2012-06-20 |
| JP4983918B2 (en) | 2012-07-25 |
| CN102506173B (en) | 2014-11-26 |
| KR101169981B1 (en) | 2012-07-31 |
| CN101678508A (en) | 2010-03-24 |
| WO2008153028A1 (en) | 2008-12-18 |
| KR20100007949A (en) | 2010-01-22 |
| JPWO2008153028A1 (en) | 2010-08-26 |
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