SI25748A - Area roughness improvement with laser - Google Patents

Area roughness improvement with laser Download PDF

Info

Publication number
SI25748A
SI25748A SI201800264A SI201800264A SI25748A SI 25748 A SI25748 A SI 25748A SI 201800264 A SI201800264 A SI 201800264A SI 201800264 A SI201800264 A SI 201800264A SI 25748 A SI25748 A SI 25748A
Authority
SI
Slovenia
Prior art keywords
pulse
power
subpulse
longer
laser
Prior art date
Application number
SI201800264A
Other languages
Slovenian (sl)
Inventor
Klemen Pompe
Janez 1000 Ljubljana Tušek
Mitja Virant
Robert IvanÄŤiÄŤ
Original Assignee
Intech-Les, Razvojni Center D.O.O.
Tkc D.O.O.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Intech-Les, Razvojni Center D.O.O., Tkc D.O.O. filed Critical Intech-Les, Razvojni Center D.O.O.
Priority to SI201800264A priority Critical patent/SI25748A/en
Priority to PCT/SI2019/050020 priority patent/WO2020117130A1/en
Publication of SI25748A publication Critical patent/SI25748A/en

Links

Classifications

    • 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
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
    • B23K26/0622—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
    • B23K26/0626—Energy control of the laser beam
    • 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
    • B23K26/355—Texturing
    • 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
    • B23K2103/05—Stainless steel

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)

Abstract

Izum se nanaša na postopek izboljšanja hrapavosti, prednostno lasersko varjene površine avstenitnega nerjavečega jekla, s ponovnim prehodom po varu s spremembo varilnih parametrov in uporabo iste varilne opreme. Z laserjem v pulznem načinu delovanja lahko preko uporabniškega vmesnika določimo potek energije enega pulza. Oblika pulza predstavlja potek moči energije laserskega žarka v času enega pulza. Oblika pulza v izbranem časovnem intervalu za izboljšanje hrapavosti površine, prednostno varov avstenitnega nerjavečega jekla je sedeča: celoten pulz je sestavljen iz velikega števila podpulzov. Podpulzi so v dveh različnih časovnih intervalih; krajši in daljši in dveh nastavljenih močeh laserskega žarka v pulzu. Iz podpulzov različnih dolžin in moči laserskega pulza so sestavljene kombinacije podpulzov A,B in C, ki se v zaporedju ABBBC ponavljajo do izteka celotnega pulza. Rezultat takšne oblike pulza je izboljšanje hrapavosti površine za vsaj dva kakovostna razreda, določena v standardu SIST EN ISO1302.The invention relates to a process for improving the roughness, preferably a laser welded surface of austenitic stainless steel, by re-passing the weld by changing the welding parameters and using the same welding equipment. With the laser in pulse mode, the energy flow of one pulse can be determined via the user interface. The shape of the pulse represents the flow of energy of the laser beam energy during one pulse. The pulse shape in the selected time interval to improve the surface roughness, preferably austenitic stainless steel welds is sedentary: the entire pulse consists of a large number of subpulses. The subpulses are at two different time intervals; shorter and longer and two set laser beam powers in the pulse. Combinations of subpulses A, B, and C are composed of subpulses of different laser pulse lengths and strengths, which are repeated in the ABBBC sequence until the entire pulse expires. The result of such a pulse shape is an improvement in surface roughness for at least two quality classes defined in the SIST EN ISO1302 standard.

Description

Izboljšanje hrapavosti površine z laserjemImproving surface roughness with a laser

Področje tehnikeField of technology

Izum se nanaša na postopek izboljšanja hrapavosti prednostno lasersko varjene površine avstenitnega nerjavečega jekla, s ponovnim prehodom po zvaru s spremembo varilnih parametrov in uporabo iste varilne opreme.The invention relates to a process for improving the roughness of a preferably laser welded surface of austenitic stainless steel, by re-passing the weld by changing the welding parameters and using the same welding equipment.

Opis tehničnega problemaDescription of the technical problem

Lasersko varjenje, poleg izjemne natančnosti, nudi tudi druge zelo pomembne prednosti. Ena izmed teh je minimalno toplotno prizadeta okolica vara. To velja še posebej za laserske vare narejene v pulznem načinu delovanja laserjev. Lasersko varjenje tudi ne ustvarja zajed ob varu. Kljub, milimetrski širini vara, pa je var še vedno viden. V primeru, da je potrebno pločevino pri varjenju prevariti je potrebno variti z določeno energijo laserskega žarka, da ustvarimo koren vara. Ta energija pa povzroča razbrazdanost temena vara. To pa pri estetsko zahtevnih varih ni zaželeno.Laser welding, in addition to exceptional precision, also offers other very important advantages. One of these is the minimally heat-affected surroundings of the weld. This is especially true for laser welds made in pulsed laser mode. Laser welding also does not create a gap at the weld. Despite the millimeter width of the weld, the weld is still visible. In case it is necessary to weld the sheet metal during welding, it is necessary to weld with a certain energy of the laser beam to create the root of the weld. This energy, however, causes the furrow of the top of the weld. However, this is not desirable for aesthetically demanding welds.

Obstoječe stanje tehnikeCurrent state of the art

Varjenje je spajanje kovinskih in nekovinskih strojnih ali konstrukcijskih delov v celoto. Nastali spoj mora obdržati čim bolj homogene in osnovnemu materialu enakovredne mehanske, fizikalne, kemijske in druge lastnosti. Vsi varjeni deli so najpogosteje iz istovrstnih ali vsaj zelo sorodnih materialov, ki imajo zelo podobno temperaturo tališča. Lasersko varjenje je varjenje z vodenim laserskim žarkom. Laserski žarek se usmeri na stik med dvema varjencema, med katerima se z vodeno energijo laserskega žarka ustvari varjeni spoj . Varjenci so običajno kovinski, lahko pa tudi iz drugih materialov.Welding is the joining of metallic and non-metallic machine or structural parts into a whole. The resulting joint must retain as homogeneous as possible and equivalent to the base material mechanical, physical, chemical and other properties. All welded parts are most often made of the same type or at least very similar materials that have a very similar melting point. Laser welding is welding with a guided laser beam. The laser beam is directed at the contact between two welds, between which a welded joint is created by the guided energy of the laser beam. Welds are usually made of metal, but can also be made of other materials.

Za lasersko varjenje se v glavnem uporabljajo laserji Nd:YAG ali modernejši vlakenski laserji. Vlakenski laserji lahko delujejo v kontinuiranem, kontinuirnem moduliranem ali pulznem načinu. Lasersko varjenje, poleg izjemne natančnosti, nudi tudi druge zelo pomembne prednosti. Ena izmed teh je minimalno toplotno prizadeta okolica vara. To velja še posebej za laserske vare narejene v pulznem načinu delovanja laserjev. Kljub izjemni natančnosti pa energija laserskega žarka povzroča razbrazdanost in hrapavost vara. Do zdaj je znanih veliko načinov zmanjševanja hrapavosti površine laserskega vara.Nd: YAG lasers or more modern fiber lasers are mainly used for laser welding. Fiber lasers can operate in continuous, continuous modulated or pulsed mode. Laser welding, in addition to exceptional precision, also offers other very important advantages. One of these is the minimally heat-affected surroundings of the weld. This is especially true for laser welds made in pulsed laser mode. Despite its exceptional accuracy, the energy of the laser beam causes the weld to be furrowed and rough. So far, many ways to reduce the surface roughness of a laser weld are known.

Patent EP0819036B1 opisuje metodo glajenja površine z uporabo laserja. Površina za obdelovanje je najprej izmerjena in strategija obdelovanja površine in parametri se določijo glede na izmerjeno površino in želeni končni rezultat. Predlagana je uporaba laserja z nižjo močjo. Bistvo izuma je prepoznavanje nepravilnosti na površini obdelovanca z uporabo 3D merilne opreme in določitev parametrov glede na izmerjene deviacije. V izumu niso navedeni parametri optimalne stopnje glajenja površin. Sama uporaba opisane 3D merilne opreme je zahtevna in zaradi zahtevane natančnosti povezana z velikimi stroški izvedbe.Patent EP0819036B1 describes a method of smoothing a surface using a laser. The cultivation area is first measured and the surface treatment strategy and parameters are determined according to the measured area and the desired end result. The use of a lower power laser is suggested. The essence of the invention is to identify irregularities on the surface of the workpiece using 3D measuring equipment and to determine the parameters according to the measured deviations. The invention does not specify the parameters of the optimal degree of surface smoothing. The use of the described 3D measuring equipment is demanding and due to the required accuracy is associated with high implementation costs.

Patent EP1516068B1 opisuje metodo glajenja in poliranja predvsem kovinskih površin s površinsko hrapavostjo minimalno 3pm z lasersko radiacijo. Metoda poteka v dveh stopnjah; grobim in finim obdelovanjem površine. V prvi stopnji se s pulznim delovanjem laserskega žarka stali površino do globine 5-100 pm z dolžino pulza >100 ps, v drugi stopnji se ostala mikro hrapavost odstrani z odparevanjem vrhov in taljenjem do globine, ki je manjša kot v prvem koraku. Za izvor laserskega žarka je uporabljen Nd:YAG laser, CO2 laser ali diodni laser, način delovanja laserja pa je pulzni ali kontinuirni. Patent ne govori o obliki pulza, definiran je samo čas pulza ki je v prvi stopnji >100 ps, v drugi stopnji pa >5 ps.Patent EP1516068B1 describes a method of smoothing and polishing mainly metal surfaces with a surface roughness of at least 3pm with laser radiation. The method takes place in two stages; rough and fine surface treatment. In the first stage, the pulsed action of the laser beam melts the surface to a depth of 5-100 pm with a pulse length> 100 ps, in the second stage the remaining micro roughness is removed by evaporating the peaks and melting to a depth less than in the first step. The Nd: YAG laser, CO2 laser or diode laser is used for the laser beam source, and the mode of operation of the laser is pulsed or continuous. The patent does not talk about the shape of the pulse, only the pulse time is defined, which in the first stage is> 100 ps, and in the second stage> 5 ps.

Patent EP1057577A2 opisuje metodo odpravljanja neravnin, por in razpok na površini laserskega vara z drugim prehodom laserja. Pri varjenju se uporabi manjša moč laserja (od 400 do 1200 W), v drugem prehodu, s katerim se odpravijo neravnine pore in razpoke, se uporabi več laserjev ( vzporedno ali zaporedno) in večja moč (od 1,5 do 10 kW). Metoda ne opiše oblike pulza za modifikacijo površine vara ampak se za odpravljanje neravnin, por in razpok na površini laserskega vara uporabi le večja moč laserja.Patent EP1057577A2 describes a method of eliminating irregularities, pores and cracks on the surface of a laser weld with a second laser pass. In welding, less laser power is used (from 400 to 1200 W), in the second pass, which eliminates uneven pores and cracks, more lasers (parallel or serial) and higher power (from 1.5 to 10 kW) are used. The method does not describe the shape of the pulse to modify the weld surface but only uses more laser power to eliminate irregularities, pores and cracks on the laser weld surface.

Predlagan izum rešuje tehnični problem s spremembo varilnih parametrov na opremi za lasersko varjenje brez dodatnih meritev površine in uporabe dodatnih laserjev. Izboljšanje hrapavosti površine vara dosežemo z isto opremo za lasersko varjenje s spremembo varilnih parametrov kot so manjša moč pulza, drugačen čas pulza, večja frekvenca in povečanje premera žarka.The proposed invention solves the technical problem by changing the welding parameters on the laser welding equipment without additional surface measurements and the use of additional lasers. Improving the surface roughness of the weld is achieved with the same laser welding equipment by changing the welding parameters such as lower pulse power, different pulse time, higher frequency and increasing the beam diameter.

Opis nove rešitveDescription of the new solution

Na laserski varilni opremi z delovanjem laserskega žarka v pulznem načinu delovanja lahko preko uporabniškega vmesnika določimo potek energije enega pulza. Z oblikovanjem pulzov lahko dosežemo različne oblike varov, temen varov, lahko pa se izognemo tudi morebitnim razpokam pri določenih materialih. Z rahlim povečanjem premera žarka oziroma defokusom in spremembo varilnih parametrov, kot so manjša moč pulza, drugačen čas pulza in večja frekvenca, dosežemo izboljšanje hrapavosti. Bistveno pa na izboljšanje vpliva oblika pulza. Oblika pulza predstavlja potek energije laserskega žarka v času enega pulza.On laser welding equipment with the operation of a laser beam in pulse mode, the energy flow of one pulse can be determined via the user interface. By shaping the pulses, we can achieve different shapes of welds, dark welds, but we can also avoid possible cracks in certain materials. By slightly increasing the beam diameter or defocus and changing the welding parameters, such as lower pulse power, different pulse time and higher frequency, we achieve an improvement in roughness. The shape of the pulse has a significant effect on the improvement. The pulse shape represents the energy flow of the laser beam during one pulse.

Oblika pulza v izbranem časovnem intervalu, ki je primerna za varjenje, prednostno avstenitnega nerjavnega jekla, je sledeča: do 25% časa trajanja enega pulza je energija konstanta in predstavlja 100% nastavljene moči laserskega žarka. Nato v preostalem času energija začne padati v treh korakih, temu sledi še kratko držanje energije pri približno 30 % nastavljene moči žarka, nato pa energija zvezno pada do izteka pulza.The pulse shape in the selected time interval, suitable for welding, preferably austenitic stainless steel, is as follows: up to 25% of the duration of one pulse, the energy is constant and represents 100% of the set power of the laser beam. Then, during the remaining time, the energy begins to fall in three steps, followed by a short holding of the energy at about 30% of the set beam power, and then the energy continuously drops until the pulse expires.

Oblika pulza v izbranem časovnem intervalu za izboljšanje hrapavosti površine vara, prednostno varov avstenitnega nerjavnega jekla, je sledeča:The pulse shape in the selected time interval to improve the surface roughness of the weld, preferably austenitic stainless steel welds, is as follows:

Pulz je sestavljen iz velikega števila podpulzov. Podpulzi so v dveh različnih časovnih intervalih; krajši in daljši in dveh nastavljenih močeh laserskega pulza; 100% nastavljene moči laserskega žarka in 0% nastavljene moči laserskega žarka.The pulse consists of a large number of subpulses. The subpulses are at two different time intervals; shorter and longer and two set laser pulse powers; 100% set laser beam power and 0% set laser beam power.

Celotni pulz je sestavljen iz kombinacij podpulzov različnih dolžin in moči.The whole pulse consists of combinations of subpulses of different lengths and strengths.

Kombinacija A je sestavljena iz več različnih podpulzov ki si sledijo v zaporedju: daljši podpulz 100% moči, krajši podpulz 0% moči, daljši podpulz 100% moči, daljši podpulz 0% moči.Combination A consists of several different subpulses that follow each other in sequence: longer subpulse 100% power, shorter subpulse 0% power, longer subpulse 100% power, longer subpulse 0% power.

Kombinacija B je sestavljena iz več različnih podpulzov ki si sledijo v zaporedju: krajši podpulz 100% moči, daljši podpulz 0% moči, krajši podpulz 0% moči, daljši podpulz 100%moči, krajši podpulz 0% moči, daljši podpulz 100% moči, krajši podpulz 0% moči, daljši podpulz 100% moči, daljši podpulz 0% moči.Combination B consists of several different subpulses that follow in sequence: shorter subpulse 100% power, longer subpulse 0% power, shorter subpulse 0% power, longer subpulse 100% power, shorter subpulse 0% power, longer subpulse 100% power, shorter subpulse 0% power, longer subpulse 100% power, longer subpulse 0% power.

Kombinacija C je sestavljena iz več različnih podpulzov ki si sledijo v zaporedju: krajši pulz 100% moči, daljši podpulz 0% moči, krajši pulz 100% moči, daljši pulz 0% moči.Combination C consists of several different subpulses that follow in sequence: shorter pulse 100% power, longer subpulse 0% power, shorter pulse 100% power, longer pulse 0% power.

Celotni pulz je sestavljen iz sledečega zaporedja kombinacij podpulzov: ABBBC. To zaporedje kombinacij podpulzov se ponavlja v časovnem intervalu enega pulza.The total pulse consists of the following sequence of subpulse combinations: ABBBC. This sequence of subpulse combinations is repeated in the time interval of one pulse.

Rezultat takšne oblike pulza je izboljšanje hrapavosti površine za vsaj dva kakovostna razreda, določena v standardu SIST EN IS01302.The result of such a pulse shape is an improvement in surface roughness for at least two quality classes defined in the SIST EN IS01302 standard.

Claims (6)

Patentni zahtevkiPatent claims 1. Postopek izboljšanja hrapavosti površine z laserjem, označen s tem, da se hrapavost vara, prednostno nerjavečega jekla, izboljša s spremembo varilnih parametrov.A method of improving the surface roughness with a laser, characterized in that the roughness of the weld, preferably stainless steel, is improved by changing the welding parameters. 2. Postopek po zahtevku 1, označen s tem, da oblika pulza predstavlja potek energije laserskega žarka v izbranem času enega pulza.Method according to claim 1, characterized in that the pulse shape represents the energy flow of the laser beam at a selected time of one pulse. 3. Postopek po zahtevku 1 in 2, označen s tem, da je celoten pulz sestavljen iz velikega števila podpulzov različnih dolžin in nastavljenih moči laserskega pulza in sicer: krajši pulz 100% nastavljene moči laserskega pulza, krajši pulz 0% nastavljene moči laserskega pulza, daljši pulz 100% nastavljene moči laserskega pulza, daljši pulz 0% nastavljene moči laserskega pulza.Method according to claims 1 and 2, characterized in that the entire pulse consists of a large number of subpulses of different lengths and set laser pulse power, namely: shorter pulse 100% of the set laser pulse power, shorter pulse 0% of the set laser pulse power, longer pulse 100% of the set laser pulse power, longer pulse 0% of the set laser pulse power. 4. Postopek po zahtevku 1 do 3, označen s tem, da je celotni pulz sestavljen iz kombinacij podpulzov različnih dolžin in moči.Method according to claims 1 to 3, characterized in that the entire pulse consists of combinations of subpulses of different lengths and strengths. 5. Postopek po zahtevku 1 do 4, označen s tem, da so kombinacije podpulzov A, B in C sestavljene iz več različnih podpulzov ki si sledijo v zaporedju:Method according to Claims 1 to 4, characterized in that the combinations of subpulses A, B and C consist of several different subpulses which follow one another in the sequence: Kombinacija A: daljši podpulz 100% moči, krajši podpulz 0% moči, daljši podpulz 100% moči, daljši podpulz 0% moči.Combination A: longer subpulse 100% power, shorter subpulse 0% power, longer subpulse 100% power, longer subpulse 0% power. Kombinacija B: krajši podpulz 100% moči, daljši podpulz 0% moči, krajši podpulz 0% moči, daljši podpulz 100%moči, krajši podpulz 0% moči, daljši podpulz 100% moči, krajši podpulz 0% moči, daljši podpulz 100% moči, daljši podpulz 0% moči.Combination B: shorter subpulse 100% power, longer subpulse 0% power, shorter subpulse 0% power, longer subpulse 100% power, shorter subpulse 0% power, longer subpulse 100% power, shorter subpulse 0% power, longer subpulse 100% power , longer subpulse 0% power. Kombinacija C: krajši pulz 100% moči, daljši podpulz 0% moči, krajši pulz 100% moči, daljši pulz 0% moči.Combination C: shorter pulse 100% power, longer subpulse 0% power, shorter pulse 100% power, longer pulse 0% power. 6. Postopek po zahtevku 1 do 5, označen s tem, da je celotni pulz sestavljen iz kombinacij podpulzov ABBBC, ki se ponavljajo do izteka pulza.Method according to claims 1 to 5, characterized in that the entire pulse consists of combinations of ABBBC subpulses that are repeated until the pulse expires.
SI201800264A 2018-12-07 2018-12-07 Area roughness improvement with laser SI25748A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI201800264A SI25748A (en) 2018-12-07 2018-12-07 Area roughness improvement with laser
PCT/SI2019/050020 WO2020117130A1 (en) 2018-12-07 2019-09-23 Improving surface roughness with a laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SI201800264A SI25748A (en) 2018-12-07 2018-12-07 Area roughness improvement with laser

Publications (1)

Publication Number Publication Date
SI25748A true SI25748A (en) 2020-06-30

Family

ID=68393051

Family Applications (1)

Application Number Title Priority Date Filing Date
SI201800264A SI25748A (en) 2018-12-07 2018-12-07 Area roughness improvement with laser

Country Status (2)

Country Link
SI (1) SI25748A (en)
WO (1) WO2020117130A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020207915A1 (en) * 2020-06-25 2021-12-30 Robert Bosch Gesellschaft mit beschränkter Haftung Method and device for producing a metal component coated with a plastic layer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1028588C2 (en) * 2005-03-22 2006-09-25 Fico Bv Method and device for separating products with a controlled cut edge and separated product.

Also Published As

Publication number Publication date
WO2020117130A1 (en) 2020-06-11

Similar Documents

Publication Publication Date Title
Knappe et al. Scaling ablation rates for picosecond lasers using burst micromachining
US4159686A (en) Process for smoothing the eye of a needle and needle made thereby
JP6646018B2 (en) Roughening method for metal compacts
KR102359488B1 (en) A method for roughening a metal molded body
CN106735906B (en) A kind of method for laser welding of titanium alloy sheet
Tangwarodomnukun et al. Evolution of milled cavity in the multiple laser scans of titanium alloy under a flowing water layer
Ascari et al. Nanosecond pulsed laser welding of high carbon steels
SI25748A (en) Area roughness improvement with laser
CN105189023B (en) For the laser system to be drilled in medical treatment device
Laitinen et al. Effect of process parameters on the formation of single track in pulsed laser powder bed fusion
Fiorucci et al. Comparative study of surface structuring of biometals by UV nanosecond Nd: YVO4 laser
JP5245972B2 (en) Laser welding method and laser welding apparatus
Herfurth et al. Micromachining with tailored nanosecond pulses
Mohid et al. Melted zone shapes transformation in titanium alloy welded using pulse wave laser
Patel et al. Parametric optimization of laser engraving process for different material using grey relational technique-a review
Kibria et al. RSM based experimental investigation and analysis into laser surface texturing on titanium using pulsed Nd: YAG laser
Zhang et al. Comparison of different laser-assisted electrochemical methods based on surface morphology characteristics
Popa et al. Investigation on laser beam machining of miniature gears
JP5814988B2 (en) Method for surface modification of casting mold
Unt et al. Laser scribing of stainless steel with and without work media
Wadekar et al. Effect of process parameters on laser cutting process: a review
Sokolov et al. The effect of joint edge surface preparation on the efficiency of fiber laser welding of low-alloyed steels
Uchtmann et al. Pulse shaping during laser percussion drilling by using fiber laser radiation
Gora et al. Laser polishing of additively manufactured CoCr and TI6AL4V parts and subsequent stress relieving
Tate et al. Fiber laser welding of high-n, High-Mn austenitic stainless steel

Legal Events

Date Code Title Description
OO00 Grant of patent

Effective date: 20200706