CN104962908A - Laser cladding method based on CCD (Charge Coupled Device) - Google Patents
Laser cladding method based on CCD (Charge Coupled Device) Download PDFInfo
- Publication number
- CN104962908A CN104962908A CN201510454893.1A CN201510454893A CN104962908A CN 104962908 A CN104962908 A CN 104962908A CN 201510454893 A CN201510454893 A CN 201510454893A CN 104962908 A CN104962908 A CN 104962908A
- Authority
- CN
- China
- Prior art keywords
- cladding
- laser
- ccd
- layer
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses a laser cladding method based on a CCD (Charge Coupled Device). The laser cladding method comprises the following steps of S1, establishing a three-dimensional model of a part, and layering the established three-dimensional model so as to obtain outline layer information of the part; S2, cladding the accumulated part layer by layer; S3, selecting a lifting capacity numerical value having good stability as a reference lifting capacity denoted as h1; S4, cladding the accumulated part layer by layer, meanwhile, calculating the lifting capacity of each layer, denoted as h2, by the CCD; S5, comparing the size relationship between the h1 and the corresponding h2, adjusting the power of laser cladding according to the comparison result, and cladding the next layer; and S6, completing cladding after the total height of the part is more than or equal to the design height. The laser cladding method based on the CCD disclosed by the invention can be carried out along with accumulation cladding of various layers of the part; the numerical value of the laser cladding power can be adjusted automatically and flexibly, so that the numerical value is matched with the cladding process; more steady size of a cladding tank can be obtained, and thus, a formed part having high quality can be obtained.
Description
Technical field
The present invention relates to laser melting and coating technique field, particularly relate to a kind of laser cladding method based on CCD.
Background technology
Laser melting coating direct forming technology is on laser melting coating basis, merges rapid prototyping technology and a kind of advanced manufacturing technology of growing up.Due to its molded parts, particularly on shaping thin-walled parts, have R&D cycle short, production cost comparatively die sinking manufacture low, and some traditional methods that can be shaped are difficult to the advantages such as the complex parts be shaped.Laser melting coating direct forming technology becomes the focus of current Quick-forming research, and has a wide range of applications in the field such as aerospace, national defence.
At present, when laser melting coating stack shaping thin-walled parts, along with piling up the increasing of the number of plies, often need to adjust laser power to keep stable molten bath uneven with the solidification morphology avoided cladding material burning and cause.
But when not having Temperature-controlled appliance, testing crew often needs to stop laser processing to adjust laser power, or when carrying out repeatedly basic test, presets the rangeability of laser power.But these two kinds of methods all can not make the laser power of adjustment keep original stability to make molten bath effectively, and can affect part forming quality to a certain extent.
Therefore, for the problems referred to above, be necessary to propose further solution.
Summary of the invention
In view of this, the invention provides a kind of laser cladding method based on CCD, to overcome the deficiencies in the prior art.
For achieving the above object, the invention provides a kind of laser cladding method based on CCD, it comprises the steps:
S1. set up the three-dimensional model of part, and layered shaping is carried out to the three-dimensional model set up, obtain the contour layer surface information of part;
Under the parameter of S2. setting laser cladding, part is piled up in successively cladding;
S3. monitor in part banking process by CCD, the numerical value of the lifting capacity of every layer, chooses the lifting capacity numerical value of good stability, as benchmark lifting capacity, is designated as h1;
S4. according to the contour layer surface information of the part obtained, part is piled up in successively cladding, and meanwhile, CCD calculates the lifting capacity of every layer, is designated as h2;
S5., in every layer of cladding process, the magnitude relationship between contrast h1 and corresponding h2, according to comparing result, regulates the power of laser melting coating, and carries out the cladding of next layer;
S6., when the total height of part is more than or equal to design height, cladding terminates.
As the improvement of the laser cladding method based on CCD of the present invention, in described step S2, the parameter of described laser melting coating is: laser power 800w, sweep velocity 7mm/s, laser defocusing amount-3.5mm, powder sending quantity 8g/min.
As the improvement of the laser cladding method based on CCD of the present invention, in described step S2, the number of plies of successively piling up is 20 layers.
As the improvement of the laser cladding method based on CCD of the present invention, described step S5 specifically comprises:
S51. when h1 is greater than h2, reduce the power of described laser melting coating, and carry out the cladding of next layer;
S52. when h1 equals h2, keep the power invariability of described laser melting coating, and carry out the cladding of next layer;
S53. when h1 is less than h2, promote the power of described laser melting coating, and carry out the cladding of next layer.
Compared with prior art, the invention has the beneficial effects as follows: the laser cladding method based on CCD of the present invention can pile up the carrying out of cladding with each layer of part, automatically adjust the numerical value of laser melting coating power flexibly, make it to match with cladding process.Thus, comparatively stable pool size can be obtained, and then obtain high-quality formation of parts.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The relation curve that Fig. 1 is laser melting coating power and piles up between the number of plies, wherein, the curve representation power adjustment curve of top, the curve of below is desired power curve;
Fig. 2 is the method flow schematic diagram of an embodiment of the laser cladding method based on CCD of the present invention.
Embodiment
Technical scheme in the present invention is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
The present invention realizes adjustment laser melting coating power automatically by CCD to obtain stabilised bath, ensure a kind of processing method of cladding forming quality.
As shown in Figure 1, particularly, in cladding banking process, for the laser power keeping molten bath to maintain original state is real-time change.Along with the carrying out of piling up, the raising of the number of plies, the required sharp cladding power in molten bath constantly reduces.Therefore, if do not reduce laser melting coating power, the burning of cladding material will inevitably be caused and affect forming quality, therefore, needing to control the laser melting coating power in forming process, ensure carrying out smoothly of cladding.
In above-mentioned embodiment, the liquid metal part with certain geometrical shape when molten bath refers to melting welding, weldment formed.The size in molten bath can center, combined reaction molten bath and molten bath laterally and longitudinal temperature field, both the size in molten bath can as one of standard weighing weld pool stability.Under molten bath has the prerequisite of good stability, the molten road that gained is solidified in stable molten bath will be also stable, and then the geometric parameter that molten road has also is stable.If keep powder feeding parameter constant, the height in the molten road be so shaped under stable pool size is also in steady state.Therefore, the height change in molten road can react the change of pool size, and also whether indirect reaction molten bath is in steady state.Thus, by regulating laser melting coating power, making molten bath have good stability, high-quality forming part can be obtained.
As shown in Figure 2, the laser cladding method based on CCD of the present invention comprises the steps:
S1. set up the three-dimensional model of part, and layered shaping is carried out to the three-dimensional model set up, obtain the contour layer surface information of part;
Under the parameter of S2. setting laser cladding, part is piled up in successively cladding;
S3. monitor in part banking process by CCD, the numerical value of the lifting capacity of every layer, chooses the lifting capacity numerical value of good stability, as benchmark lifting capacity, is designated as h1.
The pre-cladding process that described step S1-S3 is lifting capacity numerical value in order to choose good stability and carries out, the lifting capacity numerical value chosen is as benchmark lifting capacity, and it is as in follow-up cladding process, the reference contrast foundation of every layer of lifting capacity.In described step S2, the parameter of the laser melting coating of setting is: laser power 800w, sweep velocity 7mm/s, laser defocusing amount-3.5mm, powder sending quantity 8g/min.Preferably, when successively piling up, the number of plies of accumulation is set as 20 layers.
S4. according to the contour layer surface information of the part obtained, part is piled up in successively cladding, and meanwhile, CCD calculates the lifting capacity of every layer, is designated as h2.
S5., in every layer of cladding process, the magnitude relationship between contrast h1 and corresponding h2, according to comparing result, regulates the power of laser melting coating, and carries out the cladding of next layer.
Particularly, described step S5 specifically comprises:
S51. when h1 is greater than h2, reduce the power of described laser melting coating, and carry out the cladding of next layer;
S52. when h1 equals h2, keep the power invariability of described laser melting coating, and carry out the cladding of next layer;
S53. when h1 is less than h2, promote the power of described laser melting coating, and carry out the cladding of next layer.
Particularly, when h1 is less than h2, show that current lifting capacity is bigger than normal, pool size is less than normal, therefore takes the measure of hoisting power to change to make molten bath to stabilising direction.When h1 equals h2, show that current lifting capacity is stablized, pool size is stablized, and takes to keep the constant measure of power to make molten bath keep stable.When h1 is greater than h2, show that current lifting capacity is less than normal, pool size is bigger than normal, takes to fall lower powered measure and molten bath is changed to stabilising direction.
In addition, in described step S52, allow to there is certain difference between h1 and h2, when this difference within the limits prescribed, can think for h1 equals h2.
S6. when the total height of part is more than or equal to design height, cladding terminates, otherwise performs step S5.
In sum, the laser cladding method based on CCD of the present invention can pile up the carrying out of cladding with each layer of part, automatically adjust the numerical value of laser melting coating power flexibly, make it to match with cladding process.Thus, comparatively stable pool size can be obtained, and then obtain high-quality formation of parts.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification sheets is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of specification sheets is only for clarity sake, those skilled in the art should by specification sheets integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (4)
1. based on a laser cladding method of CCD, it is characterized in that, the described laser cladding method based on CCD comprises the steps:
S1. set up the three-dimensional model of part, and layered shaping is carried out to the three-dimensional model set up, obtain the contour layer surface information of part;
Under the parameter of S2. setting laser cladding, part is piled up in successively cladding;
S3. monitor in part banking process by CCD, the numerical value of the lifting capacity of every layer, chooses the lifting capacity numerical value of good stability, as benchmark lifting capacity, is designated as h1;
S4. according to the contour layer surface information of the part obtained, part is piled up in successively cladding, and meanwhile, CCD calculates the lifting capacity of every layer, is designated as h2;
S5., in every layer of cladding process, the magnitude relationship between contrast h1 and corresponding h2, according to comparing result, regulates the power of laser melting coating, and carries out the cladding of next layer;
S6., when the total height of part is more than or equal to design height, cladding terminates.
2. the laser cladding method based on CCD according to claim 1, is characterized in that, in described step S2, the parameter of described laser melting coating is: laser power 800w, sweep velocity 7mm/s, laser defocusing amount-3.5mm, powder sending quantity 8g/min.
3. the laser cladding method based on CCD according to claim 1, is characterized in that, in described step S2, the number of plies of successively piling up is 20 layers.
4. the laser cladding method based on CCD according to claim 1, is characterized in that, described step S5 specifically comprises:
S51. when h1 is greater than h2, reduce the power of described laser melting coating, and carry out the cladding of next layer;
S52. when h1 equals h2, keep the power invariability of described laser melting coating, and carry out the cladding of next layer;
S53. when h1 is less than h2, promote the power of described laser melting coating, and carry out the cladding of next layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510454893.1A CN104962908A (en) | 2015-07-29 | 2015-07-29 | Laser cladding method based on CCD (Charge Coupled Device) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510454893.1A CN104962908A (en) | 2015-07-29 | 2015-07-29 | Laser cladding method based on CCD (Charge Coupled Device) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104962908A true CN104962908A (en) | 2015-10-07 |
Family
ID=54216988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510454893.1A Pending CN104962908A (en) | 2015-07-29 | 2015-07-29 | Laser cladding method based on CCD (Charge Coupled Device) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104962908A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106445A (en) * | 2021-04-07 | 2021-07-13 | 南京辉锐光电科技有限公司 | Alloy material and laser cladding method |
| CN114147234A (en) * | 2021-12-08 | 2022-03-08 | 苏州中科煜宸激光智能科技有限公司 | Laser cladding accumulation experimental method for vertical-face inclined wall |
| CN114686878A (en) * | 2022-03-07 | 2022-07-01 | 汕头大学 | Gear laser cladding repair method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004039531A2 (en) * | 2002-10-31 | 2004-05-13 | Ehsan Toyserkani | System and method for closed-loop control of laser cladding by powder injection |
| CN101893426A (en) * | 2010-07-02 | 2010-11-24 | 西安交通大学 | Method for detecting and controlling laser metal forming height on line |
| CN102117045A (en) * | 2011-01-07 | 2011-07-06 | 西安交通大学 | Device and method for carrying out online measurement to height of a molten pool by utilizing optical method |
| CN103495729A (en) * | 2013-09-03 | 2014-01-08 | 航天特种材料及工艺技术研究所 | Laser three-dimensional forming method of large-size titanium-aluminum-based alloy |
| US20140069893A1 (en) * | 2012-09-12 | 2014-03-13 | Gerald J. Bruck | Automated superalloy laser cladding with 3d imaging weld path control |
-
2015
- 2015-07-29 CN CN201510454893.1A patent/CN104962908A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004039531A2 (en) * | 2002-10-31 | 2004-05-13 | Ehsan Toyserkani | System and method for closed-loop control of laser cladding by powder injection |
| US7043330B2 (en) * | 2002-10-31 | 2006-05-09 | Ehsan Toyserkani | System and method for closed-loop control of laser cladding by powder injection |
| CN101893426A (en) * | 2010-07-02 | 2010-11-24 | 西安交通大学 | Method for detecting and controlling laser metal forming height on line |
| CN102117045A (en) * | 2011-01-07 | 2011-07-06 | 西安交通大学 | Device and method for carrying out online measurement to height of a molten pool by utilizing optical method |
| US20140069893A1 (en) * | 2012-09-12 | 2014-03-13 | Gerald J. Bruck | Automated superalloy laser cladding with 3d imaging weld path control |
| CN103495729A (en) * | 2013-09-03 | 2014-01-08 | 航天特种材料及工艺技术研究所 | Laser three-dimensional forming method of large-size titanium-aluminum-based alloy |
Non-Patent Citations (2)
| Title |
|---|
| 王涛等: "基于嵌入式机器视觉的激光熔覆成形熔池离焦量", 《中国激光》 * |
| 黄卫东等: "《激光立体成形》", 30 November 2007, 西北工业大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106445A (en) * | 2021-04-07 | 2021-07-13 | 南京辉锐光电科技有限公司 | Alloy material and laser cladding method |
| CN114147234A (en) * | 2021-12-08 | 2022-03-08 | 苏州中科煜宸激光智能科技有限公司 | Laser cladding accumulation experimental method for vertical-face inclined wall |
| CN114686878A (en) * | 2022-03-07 | 2022-07-01 | 汕头大学 | Gear laser cladding repair method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Youheng et al. | Optimization of surface appearance for wire and arc additive manufacturing of Bainite steel | |
| Zhang et al. | Weld deposition-based rapid prototyping: a preliminary study | |
| CN103231056B (en) | Direct laser forming method for unequal-width member | |
| CN104923784B (en) | It is a kind of to improve the method that laser becomes the not wide component precision of speckle direct forming | |
| CN103476523B (en) | For being built the method and apparatus of metal objects by Solid Freeform manufacture | |
| CN107262713A (en) | Coaxial powder-feeding laser-impact forges Compound Machining building mortion and method in a kind of light | |
| CN108296618B (en) | Laser ranging device and measurement and control method for wire plasma arc additive manufacturing | |
| CN104842042B (en) | A kind of metal solder rapid forming system based on CMT and method | |
| CN111037050B (en) | Visual sense-based GTA additive manufacturing system and control method | |
| CN105108338A (en) | Method for controlling laser welding | |
| CN102941343B (en) | Quick manufacturing method of titanium-aluminum alloy composite part | |
| Ye et al. | Study of hybrid additive manufacturing based on pulse laser wire depositing and milling | |
| CN104962908A (en) | Laser cladding method based on CCD (Charge Coupled Device) | |
| CN104057204A (en) | Adaptive welding method for laser filler wire welding of high-strength steel sheet | |
| CN107442941A (en) | A kind of aluminum alloy twin-wire laser gain material manufacture method | |
| AU2003293279A1 (en) | Part-geometry independent real time closed loop weld pool temperature control system for multi-layer DMD process | |
| CN106392402A (en) | Self-adaptive control method for welding seam formation of automatic welding | |
| CN107457405A (en) | A kind of selective laser fusing former substrate automatic horizontal control system and leveling method | |
| CN108817671A (en) | Silk material electric arc melts product and laser-impact forges compound increase and decrease material manufacturing method and device | |
| CN105463452A (en) | Method for forming laser rapidly-formed element | |
| CN108247059A (en) | A kind of floor height control system and method for coaxial powder-feeding laser melting former | |
| CN204892951U (en) | Direct quick former automatic levelling device of metal | |
| CN101147971A (en) | Selective resistance welding melting powder rapid forming method | |
| CN112643058A (en) | Laser deposition forming process monitoring device and double closed-loop control method | |
| CN109128177B (en) | Method for controlling arc length of additive manufacturing arc and flatness of end face of formed part |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151007 |