CN103498149A - Laser cladding method for surface of lead screw - Google Patents
Laser cladding method for surface of lead screw Download PDFInfo
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- CN103498149A CN103498149A CN201310396991.5A CN201310396991A CN103498149A CN 103498149 A CN103498149 A CN 103498149A CN 201310396991 A CN201310396991 A CN 201310396991A CN 103498149 A CN103498149 A CN 103498149A
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Abstract
The invention discloses a laser cladding method for the surface of a lead screw. The method comprises the following steps: 1) cladding blended nickel-based ceramal powder on the surface of a lead screw in a synchronous powder feeding manner, allowing the powder and the surface of the lead screw to fuse at the same time through laser beam scanning and subjecting a mixed liquid alloy to rapid solidification through air cooling at room temperature so as to form an alloy cladding layer; and 2) allowing the surface of the cladding layer to meet requirements on assembling and working of the lead screw by using a machining manner. The method has the following advantages: 1) the surface of the lead screw has improved strength, wear resistance, high temperature resistance and corrosion resistance after cladding; 2) the cladding layer has small deformation, a compact structure, few microdefects, high bonding strength and a low rate of dilution to the surface of the lead screw; 3) the size and the position of the cladding layer can be accurately controlled, and components of the cladding layer can be conveniently adjusted according to demands of working conditions; and 4) the service life of the lead screw is prolonged, the integral performance of equipment is improved, and maintenance cost is saved.
Description
Technical field
The invention belongs to the laser melting and coating technique field, particularly relate to a kind of method of carrying out laser melting coating for the leading screw surface.
Background technology
Laser has high brightness, high directivity, high monochromaticity, high coherency's characteristics, just by increasing field, is used now, and laser melting coating is exactly a kind of in process for treating surface.That summarizes says, the principle of laser melting coating utilizes high energy laser beam to irradiate metal material surface exactly, substrate surface is melted rapidly, liquid metal forms a small-scale molten bath, fill in new powdered material simultaneously, in this molten bath, metallic substance originally mixes mutually with the powder be added, and forms the new liquid-metal layer of one deck.Treat laser beam through after, liquid-metal layer is the cooling solid-state cladding layer of one deck that forms in metallic surface thus rapidly.Laser melting coating can reach the metallicity of large this key position of change, as hardness, wear resistance, thermotolerance, erosion resistance etc.Ball screw is comprised of screw rod, nut and ball.Its function is to change into translational motion by rotatablely moving, and this is further extension and the development of ball screw, and the significance of this development becomes bearing into sliding action from scroll actions exactly.Owing to having very little friction resistance, ball-screw is widely used in various industrial equipmentss and precision instrument.But the supporting capacity of ball-screw is lower, tooling cost is higher and the shortcoming such as operation noise height, makes maintenance cost also significantly improve.
Summary of the invention
In order to address the above problem, what the object of the present invention is to provide a kind of toughness that can increase substantially the leading screw surface, intensity, high temperature resistant, corrosion-resistant and wear-resistant ability carries out laser cladding method for the leading screw surface.
To achieve the above object, a kind of method of for the leading screw surface, carrying out laser melting coating provided by the invention is carried out the following step:
1) pre-treatment is carried out in the surface of leading screw;
2) by Ni-based ceramal powder square focus spot diameter, the overlapping rate of 4～6mm be 15%～25% and the linear velocity condition of 3～10mm/s under adopt 2000～3000W optical fiber laser by the alloy powder cladding surface at leading screw, in cladding process, adopt rare gas element to be protected the cladding position, then at room temperature by air cooling, form one deck alloy cladding layer;
3) utilize the method for mechanical workout that the top layer of above-mentioned alloy cladding layer is removed and can be processed the leading screw of surface with alloy cladding layer.
As a kind of preferred version, a kind of method of carrying out laser melting coating for the leading screw surface as described in claim 1, it is characterized in that: because leading screw is subject to torsion T and anchorage force F when working, so the laser beam employing is the processing trend of axial and spiral motion mode; When cladding is carried out in the leading screw surface, the angle of cut between laser beam and leading screw surface is 70 °～90 °.
As a kind of preferred version, described Ni-based ceramal power formulations content by weight percentage is: the Indium sesquioxide (In2O3) of the nickel of 12%～15% titanium carbide, 0.2%～0.5% carbon, 4%～7% Calcium Fluoride (Fluorspan), 3%～6% silicon nitride, 2%～5% boron, 2%～4% molybdenum, 2%～6% iron, 0.5%～1% manganese, surplus and suitable proportion, rare earth (CeO2.
As a kind of preferred version, through optical path modulation squarely hot spot, its feature is that energy comparison is even.
As a kind of preferred version, the speed of laser scanning is 6.7～8.3mm/s, and the power of optical fiber laser is 1500W.
As a kind of preferred version, the feed mode of Ni-based ceramal powder is the synchronous powder feeding system method.
As a kind of preferred version, described rare gas element is chosen as nitrogen, argon gas or helium, and its effect is protected the cladding position.
As a kind of preferred version, described cladding layer thickness is 0.5～2mm.
As a kind of preferred version, the later stage machining is carried out in surface accuracy, physical dimension and the not satisfactory surface of leading screw, make it to reach work and matching requirements, this working method is the precision work grinding process.
As a kind of preferred version, described pre-treatment comprises greasy dirt and the impurity of removing the leading screw surface; The later stage machining is carried out on surface accuracy, physical dimension and not satisfactory surface to leading screw, makes it to reach work and matching requirements, and this working method is the precision work grinding process.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the front schematic perspective view of the embodiment of the present invention;
In accompanying drawing: 1. screw rod; 2. ball grooves; 3. nut; 4. ball.
Embodiment
Below in conjunction with specific embodiment, a kind of method of for the leading screw surface, carrying out laser melting coating provided by the invention is elaborated.
embodiment 1:
A kind of method of carrying out laser melting coating for the leading screw surface, carry out following steps:
1) described leading screw is ball-screw;
2) at room temperature acetone oil removing and impurity processing are carried out in the leading screw surface;
3) select numerically-controlled machine as worktable;
4) prefabricated powder: the Ni-based ceramal power formulations of the selecting nickel that content is 14% titanium carbide, 0.3% carbon, 6% Calcium Fluoride (Fluorspan), 5% silicon nitride, 4% boron, 3% molybdenum, 5% iron, 0.8% manganese, surplus by weight percentage and 3% Indium sesquioxide (In2O3) and rare earth (CeO2).
5) the leading screw clamping is rotated on worktable and thereupon, the rotating speed of worktable is 250r/min, the high energy laser beam that diameter is 3mm (being hot spot), overlapping rate is 15%, synchronize and move axially with robot system by the optical-fiber laser producer, keep laser beam consistent to the distance on ball grooves 2 surfaces, angle between laser beam and ball grooves 2 surfaces is 85 °, coordinate rotatablely moving of leading screw, realize the together screw type accurate scanning of laser beam on ball grooves 2 surfaces, sweep velocity is 6.7mm/s, in scanning process, the laser beam irradiation that is 2000W by power is to ball grooves 2 surfaces, make ball grooves 2 surface meltings (the about 0.2mm of fusing thickness), the Ni-based ceramal powdered material fusing simultaneously the automatic synchronization powder feed system provided, in melting process, select nitrogen to be protected the fusing position, two portions liquid alloy is stirred in together, after laser beam leaves, the mixing liquid alloy is at room temperature by the air cooling rapid solidification, form one deck alloy cladding layer, cladding layer thickness is 1.0mm, and powder sending quantity is 20g/min
6) check that there is the pore-free defects i.e.cracks on the cladding layer surface
7) leading screw after cladding is carried out to temper, prevent that thermal crack from producing, and removed internal stress simultaneously.
8) cladding layer is carried out to post-production, utilize the method for the mechanical workouts such as milling to remove unnecessary top layer, guarantee the physical dimension of leading screw with this, adopt the precision work mode to make ball grooves 2 surfacenesses reach assembling and job requirement, the Glabrous thorn is answered on finished surface.
9) because ball grooves 2 and nut 3 are assembled together, bear very large anchorage force F and torsional stress T, ball grooves 2 surfaces have not allowed any defect, so ball grooves 2 surfaces need through fluorescent inspection, this flaw detection is a kind of lossless detection method.
10) leading screw is carried out to surface cleaning, leading screw dries up it and soaks upper slushing oil after cleaning, and carries out dust-proof working.
embodiment 2:
A kind of method of carrying out laser melting coating for the leading screw surface, carry out following steps:
1) described leading screw is ball-screw;
2) at room temperature acetone oil removing and impurity processing are carried out in the leading screw surface;
3) select numerically-controlled machine as worktable;
4) prefabricated powder: the Ni-based ceramal power formulations of the selecting nickel that content is 14% titanium carbide, 0.3% carbon, 6% Calcium Fluoride (Fluorspan), 5% silicon nitride, 4% boron, 3% molybdenum, 5% iron, 0.8% manganese, surplus by weight percentage and 3% Indium sesquioxide (In2O3) and rare earth (CeO2).
5) the leading screw clamping is rotated on worktable and thereupon, the rotating speed of worktable is 250r/min, the high energy laser beam that diameter is 4mm (being hot spot), overlapping rate is 20%, synchronize and move axially with robot system by the optical-fiber laser producer, keep laser beam consistent to the distance on ball grooves 2 surfaces, angle between laser beam and ball grooves 2 surfaces is 85 °, coordinate rotatablely moving of leading screw, realize the together screw type accurate scanning of laser beam on ball grooves 2 surfaces, sweep velocity is 6.7mm/s, in scanning process, the laser beam irradiation that is 2500W by power is to ball grooves 2 surfaces, make ball grooves 2 surface meltings (the about 0.4mm of fusing thickness), the Ni-based ceramal powdered material fusing simultaneously the automatic synchronization powder feed system provided, in melting process, select nitrogen to be protected the fusing position, two portions liquid alloy is stirred in together, after laser beam leaves, the mixing liquid alloy is at room temperature by the air cooling rapid solidification, form one deck alloy cladding layer, cladding layer thickness is 1.4mm.Powder sending quantity is 30g/min.
6) check that there is the pore-free defects i.e.cracks on the cladding layer surface
7) leading screw after cladding is carried out to temper, prevent that thermal crack from producing, and removed internal stress simultaneously.
8) cladding layer is carried out to post-production, utilize the method for the mechanical workouts such as milling to remove unnecessary top layer, guarantee the physical dimension of leading screw with this, adopt the precision work mode to make ball grooves 2 surfacenesses reach assembling and job requirement, the Glabrous thorn is answered on finished surface.
9) because ball grooves 2 and nut 3 are assembled together, bear very large anchorage force F and torsional stress T, ball grooves 2 surfaces have not allowed any defect, so ball grooves 2 surfaces need through fluorescent inspection, this flaw detection is a kind of lossless detection method.
10) leading screw is carried out to surface cleaning, leading screw dries up it and soaks upper slushing oil after cleaning, and carries out dust-proof working.
embodiment 3:
A kind of method of carrying out laser melting coating for the leading screw surface, carry out following steps:
1) described leading screw is ball-screw;
2) at room temperature acetone oil removing and impurity processing are carried out in the leading screw surface;
3) select numerically-controlled machine as worktable;
4) prefabricated powder: the Ni-based ceramal power formulations of the selecting nickel that content is 14% titanium carbide, 0.3% carbon, 6% Calcium Fluoride (Fluorspan), 5% silicon nitride, 4% boron, 3% molybdenum, 5% iron, 0.8% manganese, surplus by weight percentage and 3% Indium sesquioxide (In2O3) and rare earth (CeO2).
5) the leading screw clamping is rotated on worktable and thereupon, the rotating speed of worktable is 350r/min, the high energy laser beam that diameter is 5mm (being hot spot), overlapping rate is 25%, synchronize and move axially with robot system by the optical-fiber laser producer, keep laser beam consistent to the distance on rod journal 3 surfaces, angle between laser beam and rod journal 3 surfaces is 95 °, coordinate rotatablely moving of leading screw, realize the together screw type accurate scanning of laser beam on rod journal 3 surfaces, sweep velocity is 8.3mm/s, in scanning process, the laser beam irradiation that is 3000W by power is to rod journal 3 surfaces, make rod journal 3 surface meltings (the about 0.6mm of fusing thickness), the Ni-based ceramal powdered material fusing simultaneously the automatic synchronization powder feed system provided, in melting process, select nitrogen to be protected the fusing position, two portions liquid alloy is stirred in together, after laser beam leaves, the mixing liquid alloy is at room temperature by the air cooling rapid solidification, form one deck alloy cladding layer, cladding layer thickness is 1.6mm.Powder sending quantity is 40g/min.
6) check that there is the pore-free defects i.e.cracks on the cladding layer surface
7) leading screw after cladding is carried out to temper, prevent that thermal crack from producing, and removed internal stress simultaneously.
8) cladding layer is carried out to post-production, utilize the method for the mechanical workouts such as milling to remove unnecessary top layer, guarantee the physical dimension of leading screw with this, adopt the precision work mode to make ball grooves 2 surfacenesses reach assembling and job requirement, the Glabrous thorn is answered on finished surface.
9) because ball grooves 2 and nut 3 are assembled together, bear very large anchorage force F and torsional stress T, ball grooves 2 surfaces have not allowed any defect, so ball grooves 2 surfaces need through fluorescent inspection, this flaw detection is a kind of lossless detection method.
10) leading screw is carried out to surface cleaning, leading screw dries up it and soaks upper slushing oil after cleaning, and carries out dust-proof working.
Claims (10)
1. a method of carrying out laser melting coating for the leading screw surface, described method is carried out the following step:
1) pre-treatment is carried out in the surface of leading screw;
2) Ni-based ceramal powder is adopted under the linear velocity condition of the square focus spot diameter of 4～6mm and 3～10mm/s 2000～3000W optical fiber laser by the powdered alloy cladding surface at leading screw, in cladding process, adopt rare gas element to be protected the cladding position, then at room temperature by air cooling, form one deck alloy cladding layer;
3) utilize the method for mechanical workout that the top layer of above-mentioned alloy cladding layer is removed and can be processed the leading screw of surface with alloy cladding layer.
2. a kind of method of carrying out laser melting coating for the leading screw surface as described in claim 1 is characterized in that: be subject to torsion T and anchorage force F due to leading screw when the work, so laser beam adopt be axially and the processing of spiral motion mode move towards; When cladding is carried out in the leading screw surface, the angle of cut between laser beam and leading screw surface is 85 °～95 °.
3. a kind of method of carrying out laser melting coating for the leading screw surface as described in claim 1, it is characterized in that: described Ni-based ceramal power formulations content by weight percentage is: the Indium sesquioxide (In2O3) of the nickel of 12%～15% titanium carbide, 0.2%～0.5% carbon, 4%～7% Calcium Fluoride (Fluorspan), 3%～6% silicon nitride, 2%～5% boron, 2%～4% molybdenum, 2%～6% iron, 0.5%～1% manganese, surplus and suitable proportion, rare earth (CeO2).
4. a kind of method of carrying out laser melting coating for the leading screw surface as described in claim 1, it is characterized in that: through optical path modulation squarely hot spot, its feature is that energy comparison is even.
5. a kind of method of carrying out laser melting coating for the leading screw surface as described in claim 1, it is characterized in that: the speed of laser scanning is 6.7～8.3mm/s, overlapping rate is 15%～25%.
6. a kind of method of carrying out laser melting coating for the automobile engine crankshaft surface as described in claim 2, it is characterized in that: described laser type is optical fiber, CO2, plasma etc., and the power of its laser apparatus is 2000W～5000W.
7. a kind of method of carrying out laser melting coating for the leading screw surface as described in claim 2, it is characterized in that: the feed mode of Ni-based ceramal powder is the synchronous powder feeding system method.
8. a kind of method of carrying out laser melting coating for the leading screw surface as described in claim 1, it is characterized in that: described rare gas element is nitrogen or argon gas, its effect is protected the cladding position.
9. a kind of method of carrying out laser melting coating for the leading screw surface as described in claim 1, it is characterized in that: described cladding layer thickness is 0.5～2mm.
10. a kind of method of carrying out laser melting coating for the leading screw surface as described in claim 1, it is characterized in that: described pre-treatment comprises greasy dirt and the impurity of removing the leading screw surface; The later stage machining is carried out on surface accuracy, physical dimension and not satisfactory surface to leading screw, makes it to reach work and matching requirements, and this working method is the precision work grinding process.
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| CN201310396991.5A CN103498149A (en) | 2013-09-05 | 2013-09-05 | Laser cladding method for surface of lead screw |
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| CN108754491A (en) * | 2018-05-31 | 2018-11-06 | 株洲辉锐增材制造技术有限公司 | A kind of titanium alloy surface method of modifying and its surface modified titanium alloy |
| CN109862994A (en) * | 2016-10-17 | 2019-06-07 | 日本精工株式会社 | Build-up welding apparatus, the manufacturing method of lead screw shaft, lead screw shaft and feed screw apparatus |
| CN114540810A (en) * | 2022-02-14 | 2022-05-27 | 潍柴动力股份有限公司 | Clamping device for laser cladding of engine connecting rod and connecting rod repairing method |
| CN116175081A (en) * | 2023-04-27 | 2023-05-30 | 中国机械总院集团宁波智能机床研究院有限公司 | Worn lead screw repairing device and method for applying same |
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| CN103981518A (en) * | 2014-05-16 | 2014-08-13 | 杭州大冶激光科技有限公司 | Laser cladding method for improving abrasion resistance of mechanical seal sleeve for pump |
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| CN108118331A (en) * | 2016-11-30 | 2018-06-05 | 杭州巨星工具有限公司 | A kind of manufacturing method of screwdriver bit and screwdriver bit |
| CN108754491A (en) * | 2018-05-31 | 2018-11-06 | 株洲辉锐增材制造技术有限公司 | A kind of titanium alloy surface method of modifying and its surface modified titanium alloy |
| CN114540810A (en) * | 2022-02-14 | 2022-05-27 | 潍柴动力股份有限公司 | Clamping device for laser cladding of engine connecting rod and connecting rod repairing method |
| CN114540810B (en) * | 2022-02-14 | 2024-04-16 | 潍柴动力股份有限公司 | Clamping device for laser cladding of engine connecting rod and connecting rod repairing method |
| CN116175081A (en) * | 2023-04-27 | 2023-05-30 | 中国机械总院集团宁波智能机床研究院有限公司 | Worn lead screw repairing device and method for applying same |
| CN116175081B (en) * | 2023-04-27 | 2023-07-21 | 中国机械总院集团宁波智能机床研究院有限公司 | Worn lead screw repairing device and method for applying same |
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Application publication date: 20140108 |