CN101879664A - Focusing light spot small-range two-dimensional oscillating type laser roller surface texture processing method and device - Google Patents
Focusing light spot small-range two-dimensional oscillating type laser roller surface texture processing method and device Download PDFInfo
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- CN101879664A CN101879664A CN 201010203988 CN201010203988A CN101879664A CN 101879664 A CN101879664 A CN 101879664A CN 201010203988 CN201010203988 CN 201010203988 CN 201010203988 A CN201010203988 A CN 201010203988A CN 101879664 A CN101879664 A CN 101879664A
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Abstract
The invention discloses a focusing light spot small-range two-dimensional oscillating type laser roller surface texture processing method, which comprises the following steps: introducing pulse laser beams output by a high-power pulsed laser into an audio-optical deflection device controlled by an audio-optical deflection driver in an audio-optical deflection system to generate a small angular deflection under the action of the audio-optical deflection device; simultaneously using a focusing mechanism which is placed at the front part or the rear part of the audio-optical deflection device to focus the entered or emitted pulsed laser beams of the audio-optical deflection device to form a series of rapidly oscillating focus light spots along rotary roller length direction or circumferential direction at a small range to perform texture processing on the surface of the roller; and forming a controlled texture pit distribution arranged by a series of non-spiral scanning line lattices. The rolled sheet material processed by the method of the invention can form the distribution of irregular textured spots, can provide various plate types, and improve rolling quality of steel plates.
Description
Technical field
The invention belongs to surface of roller laser roughening process field, particularly a kind of focal spot small-range two-dimensional oscillating type laser roller surface texture processing method and device.
Background technology
Texturing cold-reduced sheet with special surface pattern particularly has a wide range of applications in automobile and electrical appliance industry in manufacturing industry.The texturing cold-reduced sheet is by roll rolling form of surface after texturing is handled, so the surface appearance feature of texturing roll to processing performance influences such as the deep-draw of cold-reduced sheet, applications greatly.
Have good template, deep drawing quality, percentage elongation and coating performance in order to ensure cold-rolled steel sheet, in the cold-reduced sheet production technology, require that texturing is carried out on the surface of cold roll and handle, to roll out the texturing cold-rolled steel sheet that satisfies the requirement of user's special process.
Laser roller texturing technology is practical and advanced a kind of texturing technology in several texturing technology (comprising shot-peening texturing, electric spark texturing and electron beam texturing) of using now.
The laser roughening technology is that the high-energy after focusing on, the pulse laser beam of high repetition frequency are shone roller surface, utilize the high brightness of laser beam to form very high energy density at roller surface, the roller surface of laser focusing place is implemented heating, fusing and part vaporization, so that form small texturing hole at roller surface.Its basic principle is: to the high-energy-density (10 through particular modulation
4～10
6W/cm
2), high repetition frequency (10
3～10
4Inferior/second) pulse laser beam focus on, and make it act on the roller surface that rotates to form small molten bath; Blow assist gas simultaneously, the molten bath motlten metal is carried out extrusion moduling with certain orientation, pressure and flow; After the short laser pulse effect, little hole molten pool metal is cooling rapidly under roll self conduction of heat, forms the transformation hardening point of little hole and hole side ring shape boss structure.Meanwhile, the focusing pulse laser beam moves along the roll length direction, to finish the texturing process to whole roller surface.
At present, the laser roughening roll technology mainly is divided into two big classes: a class is to adopt solid Nd: the YAG laser roughening of YAG laser instrument, another kind of then is to adopt gas CO
2The CO of laser instrument
2Laser roughening.Its common feature is: adopt the Nd:YAG laser instrument of acousto-optic Q modulation or through the CO of particular modulation
2Laser instrument is processed the source as pulse laser, after laser Machining head focuses on, acts on the roller surface with certain rotating speed rotation by the pulse laser of light source output; In the process, laterally moving of laser Machining head cooperates rotatablely moving of roll, thereby distributes in the helical scanning line lattice texturing hole of roller surface formation uniform pitch.For example: Chinese patent " laser process equipment that is used for the roller surface the texturing " (patent No.: ZL94220848.X) with Chinese patent " the beam splitting type laser roughing modulation device " (patent No.: ZL200710041118.9).
The essential characteristic of above-mentioned laser roller texturing technology is: the texturing hole distributes at the helical scanning line of roller surface along a uniform pitch.(be generally 0.1～0.4mm) very for a short time with respect to roller diameter, can think: texturing hole on each circle of helical scanning line is distributed in along on the spiral straight line of roll circumference direction because the pitch of helical scanning line; Therefore the hole of the texturing on the whole roll crown is distributed in along on the parallel spires of many equidistant (being pitch) of roll circumference direction.But generally speaking, the relative position distribution in the texturing hole between each circle is unfixed; Thereby on the roll length direction, the texturing hole is non-linear and distributes, and as shown in Figure 1, can think irregular basically.
There are two significant disadvantages in above-mentioned texturing hole distribution form:
1. though the laser roughening of roller surface hole is very shallow, but for large-area texturing cold-rolled steel sheet, still can feel significantly that there is equally distributed straight line in cold-rolled steel sheet going up (rolling along the roll circumference direction) along its length, then not have tangible straight line to distribute at the horizontal direction of cold-rolled steel sheet.
2. pull easy formation of the length direction of cold-rolled steel sheet, form along straight line cut very thin on the cold-rolled steel sheet length direction.Examine these cuts, find that most cuts appear in the straight line shape white space between the corresponding roller surface two circle texturings holes.Analyzing the reason that these straight line cuts form, is because in the linear white spaces between two circle texturings holes, roll is level and smooth, closely contacts between roll and the steel plate; If form iron filings in the steel plate rolling process, then these iron filings can not be absorbed by the texturing of roller surface hole, are present in all the time between steel plate and the roll, mark visible streak continuously.
After analyzing the origin cause of formation of above-mentioned phenomenon, we find: if the texturing of roller surface hole is not the spiral linear distribution along the roll circumference direction, then above-mentioned phenomenon just can be avoided.
Summary of the invention
The present invention seeks to: for the problem that solves the prior art existence provides a kind of focal spot small-range two-dimensional oscillating type laser roller surface texture processing method and device, described method and device can make focal spot two dimension swing among a small circle, thereby process controlled random texturing point distribution or teeter texturing point distribution clocklike at roller surface.The roll of handling by this method and device can not form cut on the length direction of steel plate when rolled plate, appearance is softer, thereby improves the rolling quality of steel plate.
Technical scheme of the present invention is as follows: at first be a kind of focal spot small-range two-dimensional oscillating type laser roller surface texture processing method, it is characterized in that: the pulse laser beam of high power pulsed laser output is incident in the audio-optical deflection system in the acousto-optic deflection device by the audio-optical deflection driver control, by producing a small angle deflection after this acousto-optic deflection device effect, and use simultaneously a focusing that places acousto-optic deflection device front portion or rear portion to the pulse laser beam that enters or penetrate acousto-optic deflection device focus on the back form a series of along the roll length direction that rotates or circumferentially among a small circle fast the focal spot breaker roll surfaces of swing carry out texturing process, form the controlled texturing hole that a series of non-spiral scanning line lattices arrange at roller surface and distribute.
The inventive method is further implemented texturing process by following concrete steps breaker roll surface:
1) by roll rotating shaft on the Digit Control Machine Tool and top clamping roll;
2) start Digit Control Machine Tool, make roll, make of the length direction translation of the workbench of lift-launch audio-optical deflection system and focusing simultaneously along roll by the rotating speed rotation of setting;
3) pulse laser beam that makes high power pulsed laser output incides acousto-optic deflection device in the audio-optical deflection system through system of optical elements;
4) pass through the supersonic frequency cyclically-varying of the audio-optical deflection driver control acousto-optic deflection device in the audio-optical deflection system, thereby make the angle outgoing of pulse laser beam to change of incident, the angular dimension of outgoing depends on the supersonic frequency size of acousto-optic deflection device; So when pulse laser beam was incident in acousto-optic deflection device, the pulse laser beam transmission direction of acousto-optic deflection device output was swung with the certain rule two dimension in certain small angle range;
5) by the focusing that places acousto-optic deflection device front portion or rear portion the pulse laser beam that enters or penetrate acousto-optic deflection device is focused on;
6) under the centralized Control of the operating frequency of Digit Control Machine Tool breaker roll rotating speed, audio-optical deflection driver and workbench point-to-point speed, making described is that the two-dimentional among a small circle fast focal spot breaker roll of swinging of axis carries out texturing process simultaneously with the helix, forms the controlled texturing hole distribution that a series of non-spiral scanning line lattices are arranged at roller surface.
The present invention provides a kind of focal spot small-range two-dimensional oscillating type laser roller surface texture processing unit (plant) that can realize above-mentioned processing method simultaneously, this device can form that controlled random texturing point distributes or teeter texturing point distribution clocklike at roller surface, and simple in structure, utilization ratio of laser energy is high.
A kind of focal spot small-range two-dimensional oscillating type laser roller surface texture processing unit (plant), comprise high power pulsed laser and Digit Control Machine Tool, the workbench that drives by the translation guide rail is housed on the lathe bed of described Digit Control Machine Tool and is used to install roll and the roll rotating shaft parallel and top with the translation guide rail, it is characterized in that being equipped with on the described workbench audio-optical deflection system and focusing, described audio-optical deflection system is made of the acousto-optic deflection device and the acousto-optic deflection driver that are electrically connected, and described focusing places the front portion or the rear portion of acousto-optic deflection device.
In the said apparatus of the present invention, described audio-optical deflection driver sexually revises the frequency of acousto-optic deflection device with certain frequency period, the deflection angle that makes the pulse laser beam by acousto-optic deflection device does not stop to change among a small circle in two dimension, the operating frequency range of wherein said audio-optical deflection driver be 1Hz to 200KHz, and the range of deflection angles of described acousto-optic deflection device is that 3mrad is to 100mrad.
In the said apparatus of the present invention, described high power pulsed laser is the YAG pulse laser, and described YAG pulse laser is for transferring Q formula pulse laser or external modulation pulse laser.
In the said apparatus of the present invention, described focusing is transmission-type focus lamp or reflective focus lamp.
In the said apparatus of the present invention, also be provided with system of optical elements on the Laser Transmission light path between described high power pulsed laser and the acousto-optic deflection system.Described system of optical elements is the optical facilities of using according to the real system needs that are made of a series of optical elements, both can be beam-expanding system, also can be light-conducting system.
Said apparatus of the present invention is when concrete work, and the same with routine techniques, roll workpiece to be processed is by roll rotating shaft on the Digit Control Machine Tool and top clamping, and by roll rotating shaft driven rotary, its rotating speed is controlled by Digit Control Machine Tool.Workbench on the Digit Control Machine Tool can be done three-dimensional motion, and its point-to-point speed is controlled by Digit Control Machine Tool, and the operating frequency range of audio-optical deflection driver is also controlled by Digit Control Machine Tool.Described Digit Control Machine Tool adopts existing equipment, for example XL9 type numerically controlled lathe.
Advantage of the present invention is:
1. the inventive method and device are owing to adopt acousto-optic deflection device, realized that focal spot is axis swing type texturing process among a small circle with the helix, form the texturing hole that a series of non-spiral scanning line lattices arrange at roller surface and distribute, make to no longer include level and smooth straight line between adjacent two row's texturings holes on the roller surface circumference.So the roll that employing the inventive method and device are produced is when rolled plate, can guarantee that the iron filings particle that may form in the operation of rolling is absorbed by staggered texturing hole on the roll circumference direction, and avoid on the length direction of steel plate, causing cut, thereby improved the steel plate rolling quality greatly.
2. focal spot small-range two-dimensional oscillating type laser roller surface texture processing unit (plant) provided by the invention also has following advantage simultaneously:
(1) adopts acousto-optic deflection device to realize that focal spot is that axis is swung among a small circle with the helix on the roller surface, not only simplified optical system (need not use optical systems such as galvanometer, polygon prism to scan), and improved the control accuracy of swing.
(2) adopt the yawing moment of acousto-optic deflection device two dimension control laser beam, the roller surface focal spot is swung among a small circle fast in two dimension.
(3) adopt the speed of audio-optical deflection driver control acousto-optic deflection device frequency change, can be easily control the speed of focal spot swing speed in real time according to the needs of roll rotation speed and table translation speed.Therefore, focal spot swing mechanism of the present invention is simple, easy to use, and can require to control in real time according to reality neatly.
(4) because Digit Control Machine Tool adopts is that the digital control system of three-shaft linkage combines with the computer control of laser output power and pulse frequency, very convenient in online adjusting, realize that texturing roll surface roughness and texturing hole distribution density is variable, and can realize the multiple distribution in roll surface texturing hole, good product quality.
In a word, focal spot small-range two-dimensional oscillating type laser roller surface texture processing unit (plant) utilization ratio of laser energy height of the present invention, overall structure is simple, long service life, and working stability, working (machining) efficiency height, good product quality.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described:
The texturing hole distribution schematic diagram that Fig. 1 forms on roll for conventional laser texturing technology (the texturing hole is that linear distributes along the roll circumference direction, but is that non-linear distributes on the roll length direction);
Fig. 2 is the external structure schematic diagram of a kind of specific embodiment of the present invention;
The focal spot that Fig. 3 is positioned over acousto-optic deflection device rear portion state for focusing is two-dimensional random scanning system figure among a small circle;
The focal spot that Fig. 4 is positioned over the anterior state of acousto-optic deflection device for focusing is two-dimensional random scanning system figure among a small circle;
Fig. 5 is the fundamental diagram of audio-optical deflection system;
Fig. 6 is that focal spot small-range two-dimensional oscillating type laser roller surface texture processing unit (plant) provided by the invention distributes in the texturing hole that roller surface forms.
The specific embodiment
Embodiment: as Fig. 2, the Fig. 3 and a kind of specific embodiment that Figure 5 shows that focal spot small-range two-dimensional oscillating type laser roller surface texture processing unit (plant) provided by the invention, comprise high power pulsed laser 1 and Digit Control Machine Tool 3, the workbench 12 that drives by translation guide rail 303 is housed on the lathe bed of described Digit Control Machine Tool 3 and is used to install roll 13 and the roll rotating shaft 301 and top 302 parallel with translation guide rail 303, audio-optical deflection system 4 and focusing 6 are housed on the described workbench 12, described audio-optical deflection system 4 is made of the acousto-optic deflection device 401 and the acousto-optic deflection drivers 402 that are electrically connected, and described focusing 6 places the front portion or the rear portion of acousto-optic deflection device 401.Simultaneously specifically as shown in Figure 5, also be provided with system of optical elements 5 in the present embodiment on the Laser Transmission light path between high power pulsed laser 1 and the acousto-optic deflection system 4, described system of optical elements 5 is also not shown in Fig. 2.
Described high power pulsed laser 1 in the present embodiment adopts the YAG laser instrument, its power output from 100～2000 watts continuous adjustable, laser output wavelength is 1.06 μ m.System of optical elements described in the present embodiment 5 is beam expanding lens.Described focusing 6 is the transmission-type focus lamp.Specifically in conjunction with shown in Figure 5, described audio-optical deflection system 4 is made of the acousto-optic deflection device 401 and the acousto-optic deflection drivers 402 that are electrically connected, wherein, audio-optical deflection driver 402 sexually revises the frequency of acousto-optic deflection device 401 with certain frequency period, the deflection angle that makes the pulse laser beam 2 by acousto-optic deflection device 401 does not stop to change among a small circle in two dimension, is incident in acousto-optic deflection device 401 and the deflection of a Bidimensional small angle θ of generation after its effect when pulse laser beam 2 like this.The operating frequency range of described audio-optical deflection driver 402 be 1Hz to 200KHz, this operating frequency is by Digit Control Machine Tool 3 control, and the range of deflection angles of described acousto-optic deflection device 401 is that 3mrad is to 100mrad.
In conjunction with Fig. 2, Fig. 3, shown in Figure 5, method and the principle that adopts the foregoing description device breaker roll to carry out texturing process described, described method specifically is divided into following several steps:
1) by roll rotating shaft 301 on the Digit Control Machine Tool 3 and top 302 clamping roll 13, specifically as shown in Figure 2;
2) start Digit Control Machine Tool 3, make roll 13, make of the length direction translation of the workbench 12 of lift-launch audio-optical deflection system 4 and focusing 6 simultaneously along roll 13 by the rotating speed rotation of setting; The same with routine techniques, described roll 13 is by roll rotating shaft 301 driven rotary, and rotating speed is by Digit Control Machine Tool 3 controls; And described workbench 12 can be done three-dimensional motion, and also by Digit Control Machine Tool 3 controls, audio-optical deflection system 4 and focusing 6 move with workbench 12 in its motion;
3) pulse laser beam 2 that makes high power pulsed laser 1 output incides acousto-optic deflection device 401 in the audio-optical deflection system 4 through system of optical elements 5, specifically as shown in Figure 3;
4) the supersonic frequency cyclically-varying by the audio-optical deflection driver 402 guide sound light deflectors 401 in the audio-optical deflection system 4, thereby make the angle outgoing of pulse laser beam 2 to change of incident, the angular dimension of outgoing depends on the supersonic frequency size of acousto-optic deflection device 401; So when pulse laser beam 2 was incident in acousto-optic deflection device 401, pulse laser beam 2 transmission directions of acousto-optic deflection device 401 outputs were swung with the certain rule two dimension in certain small angle range, specifically as shown in Figure 5;
5) pulse laser beam 2 that enters or penetrate acousto-optic deflection device 401 by 6 pairs of focusings that place acousto-optic deflection device 401 front portions or rear portion focuses on;
6) under the centralized Control of the operating frequency of Digit Control Machine Tool 3 breaker rolls 13 rotating speeds, audio-optical deflection driver 402 and workbench 12 point-to-point speeds, making described is that the two-dimentional among a small circle fast focal spot breaker roll of swinging 13 of axis carries out texturing process simultaneously with the helix, forms the controlled texturing hole distribution that a series of non-spiral scanning line lattices are arranged on roll 13 surfaces.
Specifically as shown in Figure 6, owing to no longer include level and smooth straight line between adjacent two row's texturing holes on the roll 13 surperficial circumference, so the roll that the employing said apparatus is produced is in rolled plate, can guarantee that the iron filings particle that may form in the operation of rolling is absorbed by staggered texturing hole on the roll circumference direction, and avoid on the length direction of steel plate, causing cut, thereby improved the steel plate rolling quality greatly.
Embodiment 2: specifically in conjunction with shown in Figure 4, the difference of present embodiment and embodiment 1 is, in the present embodiment focusing 6 is positioned over acousto-optic deflection device 401 front portions, and focusing 6 still adopts the transmission-type focus lamp, and present embodiment all the other with embodiment 1.Incide focusing 6 after the pulse laser beam 2 process system of optical elements 5 that high power pulsed laser 1 is launched like this and focus on, and then carry out texturing process on the surface of roll 13 via acousto-optic deflection device 401 deflections of acousto-optic driver 402 controls.The relative embodiment of the equivalent focal length of focusing 61 is longer, and this is because due to acousto-optic deflection device 401 is positioned between focusing 6 and roll 13 surfaces.
Certainly the foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the people who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.The all spiritual essence of main technical schemes is done according to the present invention equivalent transformation or modification all should be encompassed within protection scope of the present invention.
Claims (7)
1. focal spot small-range two-dimensional oscillating type laser roller surface texture processing method, it is characterized in that: the pulse laser beam (2) of high power pulsed laser (1) output is incident in the acousto-optic deflection device of being controlled by audio-optical deflection driver (402) in the audio-optical deflection system (4) (401), produce a small angle deflection by this acousto-optic deflection device (401) effect back, and use simultaneously a focusing (6) that places acousto-optic deflection device (401) front portion or rear portion to the pulse laser beam (2) that enters or penetrate acousto-optic deflection device (401) focus on the back form a series of along roll (13) length direction that rotates or circumferentially among a small circle fast focal spot breaker roll (13) surfaces of swing carry out texturing process, form the controlled texturing hole that a series of non-spiral scanning line lattices arrange on roll (13) surface and distribute.
2. focal spot small-range two-dimensional oscillating type laser roller surface texture processing method according to claim 1 is characterized in that implementing texturing process by following concrete steps breaker roll (13) surface:
1) by roll rotating shaft (301) on the Digit Control Machine Tool (3) and top (302) clamping roll (13);
2) start Digit Control Machine Tool (3), make roll (13), make of the length direction translation of the workbench (12) of lift-launch audio-optical deflection system (4) and focusing (6) simultaneously along roll (13) by the rotating speed rotation of setting;
3) pulse laser beam (2) that makes high power pulsed laser (1) output incides acousto-optic deflection device (401) in the audio-optical deflection system (4) through system of optical elements (5);
4) the supersonic frequency cyclically-varying by audio-optical deflection driver (402) the guide sound light deflector (401) in the audio-optical deflection system (4), thereby make the angle outgoing of pulse laser beam (2) to change of incident, the angular dimension of outgoing depends on the supersonic frequency size of acousto-optic deflection device (401); So when pulse laser beam (2) was incident in acousto-optic deflection device (401), pulse laser beam (2) transmission direction of acousto-optic deflection device (401) output was swung with the certain rule two dimension in certain small angle range;
5) by the focusing (6) that places acousto-optic deflection device (401) front portion or rear portion the pulse laser beam (2) that enters or penetrate acousto-optic deflection device (401) is focused on;
6) under the centralized Control of the operating frequency of Digit Control Machine Tool (3) breaker roll (13) rotating speed, audio-optical deflection driver (402) and workbench (12) point-to-point speed, making described is that the two-dimentional among a small circle fast focal spot breaker roll of swinging (13) of axis carries out texturing process simultaneously with the helix, forms the controlled texturing hole distribution that a series of non-spiral scanning line lattices are arranged on roll (13) surface.
3. one kind is used to realize the focal spot small-range two-dimensional oscillating type laser roller surface texture processing unit (plant) of processing method according to claim 1, comprise high power pulsed laser (1) and Digit Control Machine Tool (3), the workbench (12) that drives by translation guide rail (303) is housed on the lathe bed of described Digit Control Machine Tool (3) and is used to install roll (13) and roll rotating shaft (301) and top (302) parallel with translation guide rail (303), it is characterized in that being equipped with on the described workbench (12) audio-optical deflection system (4) and focusing (6), described audio-optical deflection system (4) is made of acousto-optic deflection device (401) that is electrically connected and acousto-optic deflection driver (402), and described focusing (6) places the front portion or the rear portion of acousto-optic deflection device (401).
4. focal spot small-range two-dimensional oscillating type laser roller surface texture processing unit (plant) according to claim 3, it is characterized in that described high power pulsed laser (1) is the YAG pulse laser, described YAG pulse laser is for transferring Q formula pulse laser or external modulation pulse laser.
5. focal spot small-range two-dimensional oscillating type laser roller surface texture processing unit (plant) according to claim 3, it is characterized in that described audio-optical deflection driver (402) sexually revises the frequency of acousto-optic deflection device (401) with certain frequency period, the deflection angle that makes the pulse laser beam (2) by acousto-optic deflection device (401) does not stop to change among a small circle in two dimension, the operating frequency range of wherein said audio-optical deflection driver (402) be 1Hz to 200KHz, and the range of deflection angles of described acousto-optic deflection device (401) is that 3mrad is to 100mrad.
6. focal spot small-range two-dimensional oscillating type laser roller surface texture processing unit (plant) according to claim 3 is characterized in that described focusing (6) is transmission-type focus lamp or reflective focus lamp.
7. focal spot small-range two-dimensional oscillating type laser roller surface texture processing unit (plant) according to claim 3 is characterized in that also being provided with system of optical elements (5) on the Laser Transmission light path between described high power pulsed laser (1) and the acousto-optic deflection system (4).
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| CN 201010203988 CN101879664A (en) | 2010-06-21 | 2010-06-21 | Focusing light spot small-range two-dimensional oscillating type laser roller surface texture processing method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102441735A (en) * | 2011-09-22 | 2012-05-09 | 中国航天科技集团公司第五研究院第五一○研究所 | Method for obtaining energy distribution of section of any laser beam based on orthogonal acoustic-optic deflectors |
| CN112518076A (en) * | 2019-09-18 | 2021-03-19 | 林肯环球股份有限公司 | Surface modification of welding wire drive roller |
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| CN101642778A (en) * | 2009-08-04 | 2010-02-10 | 苏州市博海激光科技有限公司 | Laser texturing processing method on surface of roller |
| CN101642849A (en) * | 2009-08-04 | 2010-02-10 | 苏州市博海激光科技有限公司 | Laser texturing processing method on surface of roller |
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| CN2209008Y (en) * | 1994-09-10 | 1995-10-04 | 中国科学院力学研究所 | Laser working equipment for roller surface roughening |
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| CN112518076A (en) * | 2019-09-18 | 2021-03-19 | 林肯环球股份有限公司 | Surface modification of welding wire drive roller |
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Application publication date: 20101110 |