CN103252573A - Sound-emission auxiliary coaxial visual hot-wire low-power laser mould repairing method and equipment - Google Patents
Sound-emission auxiliary coaxial visual hot-wire low-power laser mould repairing method and equipment Download PDFInfo
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- CN103252573A CN103252573A CN201310126822XA CN201310126822A CN103252573A CN 103252573 A CN103252573 A CN 103252573A CN 201310126822X A CN201310126822X A CN 201310126822XA CN 201310126822 A CN201310126822 A CN 201310126822A CN 103252573 A CN103252573 A CN 103252573A
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Abstract
The invention belongs to the field of metal material processing, relates to a sound-emission auxiliary coaxial visual hot-wire low-power laser mould repairing method and equipment, and aims to provide a process method and equipment capable of improving mould repairing quality and efficiency. Aiming at different mould metal matrix materials, a hot wire technology, vision sensing, sound emission and a low-power laser technology are combined, audition and vision of humans on quality control information fusion in a welding process are simulated, laser mould repairing state changes are monitored in real time, and accordingly mould repairing quality and efficiency are improved. In order to implement the process method, reinforcement equipment composed of a control unit, a visual system, a sound emission sensor, a temperature-adjustable hot wire feeder, a laser device and a five-degree-of-freedom numerically-controlled workbench is developed. Thermal fatigue resistance and wear resistance of mould functional surfaces are improved effectively, and cost performance and production efficiency are high.
Description
Technical field
The invention belongs to the metal material processing field.
Background technology
Mould is industrial fundamental technology equipment, and in products such as electronics, automobile, motor, electrical equipment, instrument, instrument, household electrical appliances and communication, 60% ~ 80% parts all will rely on die forming.Ningbo is one of China mould major production base.At present, family surplus the family surplus the total mould in the whole city and the supporting enterprise 6000, professional mould enterprise 4700, the practitioner surpasses 200,000 people.2010,152 families of the above professional mould of whole city's scale manufacturing enterprise realized 27,700,000,000 yuan of the mould industry gross output values, realize 71.4 hundred million yuan of profits taxes, and wherein total profit is 63.6 hundred million yuan.Mould outlet delivery in 2010 is worth 6.2 hundred million yuan, and on average with 30% speed increment, the Ningbo mould industry gross output value and sales volume are average annual with the speed fast development more than 20% 2006～2010 for 2006 to 2010 mould outlets; Assist in the ten listed big class moulds at Chinese mould, Ningbo is celebrated with mould of plastics, die casting, casting mould, powder metallurgy die.Compression mod accounts for the whole nation 45%, and casting die accounts for the whole nation 60%, and powder metallurgy mould accounts for the whole nation 25%, and the plastics mould accounts for the whole nation 16%.Mould industry zone, Ningbo characteristic is obvious.The casting die in the accurate plastics mould in the large plastic mould of Ninghai, the compression mod of northern logical sequence, Yuyao, the household electrical appliances mould of Cixi, Xiangshan, the characteristic moulds such as auto parts and components mould in Yin state be existing considerable influence at home.It is " township of casting die " etc. for " Chinese light industry mould production base ", northern logical sequence for " township of compression mod ", Xiangshan for " Chinese mould of plastics production base " and " township of plastics mould ", Yuyao that national departments concerned is authorized the Ninghai respectively, and the Ningbo City is awarded " Chinese mould all ".
Though China's mould production development is very fast, compare and there is a big difference with external advanced level, mainly show aspects such as the manufacturing cycle is long, the accuracy of manufacture is low, die life is short, wherein the problem of lacking die life is particularly outstanding.Be generally 3-10 ten thousand moulds time as the domestic common die casting life-span, can reach 10-35 ten thousand moulds abroad, for those goods that require to keep the die casting surfaces, 1-2 ten thousand moulds are only arranged sometimes die life.The short rising that directly causes the wasting of resources and production cost die life, therefore, carry out the research of mould repair reconstruction technique, prolong die life, have important practical significance, if improve die life more than 20% by the mould repair reconstruction technique, will bring great economic benefit to enterprise.
The air load acoustic emission of laser beam welding is a kind of signal that welding process is sent, and can characterize the more multifactor of welding quality, as weld defect, splash, welding stability etc., can be used as the indirect variable that welding quality is controlled controlled variable in real time.Visual sensing is generally relatively responsive to the state of face of weld, but butt welded seam splashes, there is detection difficult in defective etc.They can detect welded conditions such as welding seam misalignment, gap, molten bath and keyhole state simultaneously again.Give the function that the operator " sees " according to visual sensing, the function that the operator " listens " is given in air load acoustic emission, plan is based on mould repair state visual sensing control model, utilize the sound sense of hearing of laser weld electric arc and image sensing vision complementarity and correlation, anthropomorphic dummy's the sense of hearing and vision provide and improve mould repair quality and a kind of new method of efficient the warm processing procedure of welding process quality control information.
Also there is not acoustic emission to assist coaxial vision heated filament low-power laser mould repair method and apparatus so far.
Summary of the invention
Below the present invention is described in detail:
Generally return mould manufacturer when front mold application enterprise runs into the precision die reparation, if the import mould, repairing efficiency is long, expense is high.The mould laser renovation technique complexity that manually fills silk requires highly to welder's operating technology, remediation efficiency is low, influence the manual recovery technique popularization of low-power laser mould.If can improve the automation of low-power laser mould repair and intellectuality, reduce the requirement of welder's technical ability, improve mould repair quality and efficient, will promote the laser die recovery technique to use business enterprise expand at mould.
Coaxial vision heated filament low-power laser mould repair method is assisted in acoustic emission provided by the invention, and its concrete steps are:
Utilize automatic heated filament technology, visual sensing, acoustic emission sensing and low-power laser technology combine, optimize low-power laser mould repair technological parameter, utilize data and characteristic information multiple agent decision-making integration technology, the laser die of vision and acoustic emission system collection is repaired status flag information carry out fusion treatment, finish by laser instrument, wire-feed motor and five degree of freedom numerical control table, NC table according to result the laser die repairing quality is controlled.
This heated filament low-power laser mould repair equipment, by the auxiliary coaxial vision collecting of control module, acoustic emission system, adjustable warm silk wire-feed motor, laser instrument and five degree of freedom numerical control table, NC table are formed, and its general structure is seen accompanying drawing 1, describes in detail respectively below.
1. control module: control module is an industrial control computer, and heated filament low-power laser mould repair technical module, the auxiliary coaxial vision data Fusion Module of acoustic emission and digital control processing module have been installed.
" heated filament low-power laser mould repair technical module " major part is the working process parameter database, and this database is the result that a large amount of experimental datas are summed up and optimized.Each bar data record comprises the trade mark of material, original microscopic structure in the database, the frequency of laser instrument, current strength, pulsewidth, sweep speed, Laser Welding wire material, diameter, temperature, wire feed rate, function surface crackle form, position, function surface wear form, position.
" coaxial vision data Fusion Module is assisted in acoustic emission " is to utilize data and characteristic information multiple agent decision-making integration technology, the laser die of vision and acoustic emission system collection is repaired status flag information carry out fusion treatment, finish by laser instrument, wire-feed motor and five degree of freedom numerical control table, NC table according to result the laser die repairing quality is controlled.
" heated filament low-power laser mould repair digital control processing module " can according to die surface crackle and wearing and tearing profile, size, etc. manual teaching, generate nc program; Can be according to function surface crackle and state of wear, vision guide planning mould laser repairing path generates nc program; Can form nc program automatically according to designing mould repair path and technological parameter; Also can generate nc program at other computer according to Mould CAD figure, import then in this teaching system.
2. the auxiliary coaxial vision collecting of acoustic emission system: the auxiliary coaxial vision collecting of acoustic emission system is connected with laser coaxial, by CCD visual sensing laser welding wire position and molten state, mould repair molten bath and formed features, gather mould laser repairing defective, splash, repair characteristic signal such as stability by acoustic emission, be uploaded to the control module acoustic emission and assist coaxial vision data Fusion Module.
3. laser instrument: laser instrument is less than 500W fiber optic conduction small-power Nd:YAG solid state laser or optical fiber laser.
4. adjustable warm silk wire-feed motor: adjustable warm silk wire-feed motor is microcomputer control, the Laser Welding filament diameter is 0.1 ~ 0.6mm, 50 ~ 400 ℃ of welding wire temperature control scopes, 1 ℃ of temperature-controlled precision, wire feed rate is 1.0 ~ 20m/min, the wire feed rate error is connected by securing member with laser instrument less than 5%, and the mutual positioning accuracy of welding wire and laser beam is less than ± 0.2 mm.
5. five degree of freedom numerical control table, NC table: the five degree of freedom numerical control table, NC table is made up of heated filament low-power laser mould repair digital control processing software systems and five degree of freedom mechanical scanning, the digital control processing software systems can make laser head rotate along A axle, C axle, move along the Z axle, make the workpiece erecting bed moving along X, y-axis shift.Workpiece erecting bed wherein is made up of X-direction feed mechanism, Y-direction feed mechanism, XY worktable, it is characterized in that the Y-direction feed mechanism is installed on the lathe bed, and the X-direction feed mechanism is installed on the Y-direction feed mechanism, places mould on the XY worktable; Laser head drives with the A axle and links to each other, and the A axle drives with the driving of C axle and links to each other, and is installed on the double pendulum headstock; The double pendulum headstock is installed on the column, can move along the Z axle.
The mechanical realization of workbench as shown in Figure 2, heated filament low-power laser mould repair method flow is as follows:
1, with mould holding on workbench, closed power supply starts five degree of freedom numerical control table, NC table, laser power supply, vision collecting system, acoustic emission acquisition system and adjustable warm silk wire-feed motor;
2, adjust laser spot and die surface relative position by the five degree of freedom numerical control table, NC table, adjust laser welding wire and function surface, focal position of laser by wire-feed motor;
3, start " heated filament low-power laser mould repair technical module ", according to program prompts input information, determine laser silk filling optimization technological parameter.Start " heated filament low-power laser mould repair digital control processing module ", can be according to profile, size, crackle and the wearing and tearing pose etc. of die surface, manual teaching generates nc program;
4, start " processing beginning ", the parameter about laser energy in the technological parameter is delivered to laser instrument, and laser power supply arranges laser parameter according to the signal that microcomputer transmits; Procedure is delivered to numerical control table, NC table, and digital control platform is according to procedure control driven by servomotor working table movement;
5, in the process, " coaxial vision data Fusion Module is assisted in acoustic emission " is to utilize data and characteristic information multiple agent decision-making integration technology, the laser die of vision and acoustic emission system collection is repaired status flag information carry out fusion treatment, finish by laser instrument, wire-feed motor and five degree of freedom numerical control table, NC table according to result the laser die repairing quality is controlled.
The present invention has following advantage:
1, gives the function that the operator " sees " according to visual sensing, the function that the operator " listens " is given in air load acoustic emission, plan is based on mould repair state visual sensing control model, utilize the sound sense of hearing of laser weld electric arc and image sensing vision complementarity and correlation, anthropomorphic dummy's the sense of hearing and vision provide and improve mould repair quality and efficient new method the warm processing procedure of welding process quality control information.
2, the mould laser renovation technique complexity that manually fills silk requires highly to welder's operating technology, remediation efficiency is low, influence the manual recovery technique popularization of low-power laser mould.The automation of low-power laser mould repair and intellectuality reduce the requirement of welder's technical ability, improve mould repair quality and efficient, promote the laser die recovery technique to use business enterprise expand at mould.
3, the auxiliary coaxial vision heated filament low-power laser mould repair equipment of acoustic emission improves mould laser repairing automation and intellectuality, has easy and simple to handle, stable and the high characteristics of production efficiency.
Description of drawings
The overall control structure schematic diagram of the auxiliary coaxial vision laser die prosthetic appliance of Fig. 1 acoustic emission.
Coaxial vision laser die prosthetic appliance master TV structure schematic diagram is assisted in Fig. 2 acoustic emission.
The specific embodiment
The invention will be further described in the enforcement that provides by reference to the accompanying drawings:
1, with mould holding on workbench, closed power supply starts five degree of freedom numerical control table, NC table, laser power supply, vision collecting system, acoustic emission acquisition system and adjustable warm silk wire-feed motor.
2, adjust laser spot and die surface relative position by the five degree of freedom numerical control table, NC table, adjust laser welding wire and function surface, focal position of laser by wire-feed motor.
3, start " heated filament low-power laser mould repair technical module ", according to program prompts input information, determine laser silk filling optimization technological parameter.Start " heated filament low-power laser mould repair digital control processing module ", can be according to profile, size, crackle and the wearing and tearing pose etc. of die surface, manual teaching generates nc program.
4, start " processing beginning ", the parameter about laser energy in the technological parameter is delivered to laser instrument, and laser power supply arranges laser parameter according to the signal that microcomputer transmits; Procedure is delivered to numerical control table, NC table, and digital control platform is according to procedure control driven by servomotor working table movement.
5, in the process, " coaxial vision data Fusion Module is assisted in acoustic emission " is to utilize data and characteristic information multiple agent decision-making integration technology, the laser die of vision and acoustic emission system collection is repaired status flag information carry out fusion treatment, finish by laser instrument, wire-feed motor and five degree of freedom numerical control table, NC table according to result the laser die repairing quality is controlled.
Analyze the auto parts goods and surface quality problems occurs, determine that die surface easily cracks the position, adopt the pulsed YAG laser device, condenser lens focal distance f=100mm, laser weld electric current 180A, defocusing amount are-2.5 o'clock, frequency 6HZ, the angle that fills silk is less than 30 degree, speed of welding 30mm/min, material is H13 laser welding wire, and the silk filling diameter is 0.4mm, wire feed rate 40mm/min, 200 ℃ of hot-wire temperatures, argon flow amount 10.0ml/min, the laser silk filling is repaired the efficient of transfer mould and is more manually repaired raising more than 2 times, and improve more than 80% die life.
Claims (8)
1. coaxial vision heated filament low-power laser mould repair equipment is assisted in an acoustic emission, by the auxiliary coaxial vision collecting of control module, acoustic emission system, adjustable warm silk wire-feed motor, laser instrument and five degree of freedom numerical control table, NC table are formed, it is characterized in that control module respectively with the auxiliary coaxial vision collecting of laser instrument, acoustic emission system, the communication interface system of adjustable warm silk wire-feed motor and five degree of freedom numerical control table, NC table links to each other.
2. by the described equipment of claim 1, it is characterized in that described control module is the integrated of the auxiliary coaxial vision data Fusion Module of heated filament low-power laser mould repair technical module, acoustic emission and digital control processing module.
3. by the described equipment of claim 2, it is characterized in that the auxiliary coaxial vision collecting of described acoustic emission system is for to be connected with laser coaxial, by CCD visual sensing laser welding wire position and molten state, mould repair molten bath and formed features, gather mould laser repairing defective, splash, repair characteristic signal such as stability by acoustic emission, be uploaded to the control module acoustic emission and assist coaxial vision data Fusion Module.
4. by the described equipment of claim 3, it is characterized in that the auxiliary coaxial vision data Fusion Module of described acoustic emission is for utilizing data and characteristic information multiple agent decision-making integration technology, the laser die of vision and acoustic emission system collection is repaired status flag information carry out fusion treatment, finish by laser instrument, wire-feed motor and five degree of freedom numerical control table, NC table according to result the laser die repairing quality is controlled.
5. by the described equipment of claim 1, it is characterized in that described adjustable warm silk wire-feed motor is microcomputer control, the Laser Welding filament diameter is 0.1 ~ 0.6mm, 50 ~ 400 ℃ of welding wire temperature control scopes, wire feed rate is 1.0 ~ 20m/min, the wire feed rate error is connected by securing member with laser instrument less than 5%, and the mutual positioning accuracy of welding wire and laser beam is less than ± 0.2 mm; The five degree of freedom numerical control table, NC table is made up of low-power laser mould repair digital control processing software systems and five degree of freedom mechanical scanning, and control module can make laser head rotate along A axle, C axle, moves along the Z axle, makes the workpiece erecting bed moving along X, y-axis shift; Workpiece erecting bed wherein is made up of X-direction feed mechanism, Y-direction feed mechanism, XY worktable, it is characterized in that the Y-direction feed mechanism is installed on the lathe bed, and the X-direction feed mechanism is installed on the Y-direction feed mechanism, places mould on the XY worktable; Laser head drives with the A axle and links to each other, and the A axle drives with the driving of C axle and links to each other, and is installed on the double pendulum headstock; The double pendulum headstock is installed on the column, can move along the Z axle.
6. one kind is adopted the auxiliary coaxial vision heated filament low-power laser mould repair method of acoustic emission as claimed in claim 1, it is characterized in that: utilize laser silk filling method for processing, die surface is carried out local repair and reconstruction; Described functional die surface comprises mould molding spare surface, convex mould surface, die surface.
7. by the described method of claim 6, it is characterized in that the auxiliary coaxial vision of described acoustic emission is based on coaxial vision monitoring, be auxilliary with acoustic emission signal, utilize data and characteristic information multiple agent decision-making integration technology, finish laser die and repair state variation and monitor in real time.
8. by the described method of claim 6, it is characterized in that described low-power laser is less than 500W fiber optic conduction small-power Nd:YAG solid state laser or optical fiber laser.
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| CN103710698A (en) * | 2013-09-23 | 2014-04-09 | 浙江大学宁波理工学院 | Mold surface coupling bionic repair method through inside-laser coaxial wire feeding assisted laser melt injection |
| CN106141436A (en) * | 2016-08-17 | 2016-11-23 | 广东工业大学 | Wire filling laser welding increases material repair apparatus and method for repairing and mending |
| CN106271125A (en) * | 2016-08-23 | 2017-01-04 | 江苏彤明车灯有限公司 | A kind of method based on double CCD Computer Vision Recognition mould repair states |
| CN107378250A (en) * | 2017-05-31 | 2017-11-24 | 广东工业大学 | Large-scale part laser melting coating impact based on CCD monitoring forges combined shaping method |
| CN108645863A (en) * | 2018-05-09 | 2018-10-12 | 苏州康鸿智能装备股份有限公司 | It is a kind of detection and laser repairing module |
| CN110280903A (en) * | 2019-07-01 | 2019-09-27 | 深圳市通发激光设备有限公司 | A kind of energy-saving semiconductor light source mold laser gain material repair system |
| CN110744198A (en) * | 2018-07-19 | 2020-02-04 | 林肯环球股份有限公司 | Laser hot wire additive deposition head with omnidirectional construction path |
| CN110773870A (en) * | 2019-09-24 | 2020-02-11 | 山东雷石智能制造股份有限公司 | Multi-laser coaxial wire feeding additive manufacturing equipment and wire feeding method |
| CN110893512A (en) * | 2018-08-24 | 2020-03-20 | 发那科株式会社 | Laser processing system and laser processing method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103710698A (en) * | 2013-09-23 | 2014-04-09 | 浙江大学宁波理工学院 | Mold surface coupling bionic repair method through inside-laser coaxial wire feeding assisted laser melt injection |
| CN103710698B (en) * | 2013-09-23 | 2016-04-13 | 浙江大学宁波理工学院 | A kind of coaxial wire feed auxiliary laser molten note die surface coupling bionics prosthesis method in light |
| CN106141436A (en) * | 2016-08-17 | 2016-11-23 | 广东工业大学 | Wire filling laser welding increases material repair apparatus and method for repairing and mending |
| CN106271125A (en) * | 2016-08-23 | 2017-01-04 | 江苏彤明车灯有限公司 | A kind of method based on double CCD Computer Vision Recognition mould repair states |
| CN107378250A (en) * | 2017-05-31 | 2017-11-24 | 广东工业大学 | Large-scale part laser melting coating impact based on CCD monitoring forges combined shaping method |
| CN107378250B (en) * | 2017-05-31 | 2019-10-29 | 广东工业大学 | Large-scale part laser melting coating impact based on CCD monitoring forges combined shaping method |
| CN108645863A (en) * | 2018-05-09 | 2018-10-12 | 苏州康鸿智能装备股份有限公司 | It is a kind of detection and laser repairing module |
| CN110744198A (en) * | 2018-07-19 | 2020-02-04 | 林肯环球股份有限公司 | Laser hot wire additive deposition head with omnidirectional construction path |
| CN110893512A (en) * | 2018-08-24 | 2020-03-20 | 发那科株式会社 | Laser processing system and laser processing method |
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| CN110280903A (en) * | 2019-07-01 | 2019-09-27 | 深圳市通发激光设备有限公司 | A kind of energy-saving semiconductor light source mold laser gain material repair system |
| CN110773870A (en) * | 2019-09-24 | 2020-02-11 | 山东雷石智能制造股份有限公司 | Multi-laser coaxial wire feeding additive manufacturing equipment and wire feeding method |
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Effective date of registration: 20151105 Address after: 315506 No. 1 foreshore Road, Binhai New Area, Zhejiang, Fenghua, China Applicant after: NINGBO XIANGHEYUAN AUTO PARTS CO., LTD. Address before: 315100 Ningbo, Zhejiang Higher Education Park money Hunan Road No. 1 Applicant before: Ningbo Institute of Technology, Zhejiang University |
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