CN109825790A - A kind of manufacturing method of tungsten carbide coating anilox roll - Google Patents
A kind of manufacturing method of tungsten carbide coating anilox roll Download PDFInfo
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- CN109825790A CN109825790A CN201910204927.XA CN201910204927A CN109825790A CN 109825790 A CN109825790 A CN 109825790A CN 201910204927 A CN201910204927 A CN 201910204927A CN 109825790 A CN109825790 A CN 109825790A
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Abstract
The present invention relates to a kind of preparation methods of tungsten carbide coating anilox roll.It is not high for conventional laser engraving ceramic anilox roller line number, mesh profile is not clear enough, anchoring strength of coating is not high easy to fall off, coating porosity is big, the problems such as being easily stained with black not easy cleaning, the present invention uses on aluminium or steel metal roller, sprayed wc coating, coating layer thickness 0.05-1.0mm, microhardness 1100-1400HV0.3, coating densification (porosity < 0.5%), bond strength height (> 75MPa), it is not easily to fall off, Ra < 0.2um after grinding-polishing, using Hercules nanometers of pulse lasers of Meridian, using multiple beam, repeatedly strike and monochrome/gray scale engraving technology, screen density is up to 1600 lines/inch, ink cell various shapes, there are 30 °, 60 ° of hexagons, 45 ° of twills, ripple glaze etc., ink cell shape Shape regular uniform, inner wall smooth carry that ink amount is accurate, releases that ink amount is excellent, coating is fine and close, is not easy to be stained with ink, easy cleaning, significant for printing the printing of high quality.
Description
Technical field
The invention belongs to anilox roll technical fields, and in particular to a kind of to be applied with laser beam in supersonic flame spraying tungsten carbide
The method of layer surface engraving anilox roll.
Background technique
The main parting category anilox roll of anilox roll and laser engraving ceramic anilox roller.Metal anilox roll is usually in metallic roll table
Face carries out electrodeposited chromium layers after electric carving or mechanical presses engraving；Laser engraving ceramic anilox roller is to spray alloy bottom in metalling roll surface
Layer, then plasma sprayed ceramic layer, after grinding-polishing, laser engraving goes out ink cell, then carries out smart throwing.Laser engraving ceramic anilox
Roller hardness is high, ink transfer amount is big, can print full version, printing bright in luster, blotting amount is big.The press resistance rate of metal chromium plating anilox roll is
It 1000-3000 ten thousand times, easily wears, ink cell volume changes after abrasion, influences printing quality.Laser engraving ceramic anilox roller
Wearability is higher by 20-30 times of chrome-plated roller, and up to 400,000,000 impressions, wearability is good, and scraper device can be used.
Conventional laser is carved there are mainly two types of ceramic anilox rollers, and one kind is CO2Laser engraving anilox roll is able to satisfy low and middle-grade
The needs of printing can print panchromatic tune and thicker text, but there are still very big problem, be mainly manifested in: 1) CO2Laser
Wavelength is 10.6 microns, and hot spot is larger after focusing, bigger suitable for engraving mesh, the less close anilox roll of mesh arrangements, i.e.,
The less high anilox roll of line number, effective cable are about 80-300lpi；2)CO2Laser is when carving ceramics, CO2The peak value of laser
Power density with energy density be not also it is very high, in engraving, the gasification of part ceramic material, there are also part ceramic material still in
Cladding state leaves magma shape surface in mesh inner wall, easily causes the blocking of ink or ink；3) CO of relatively high power2Swash
Light device, structure is more complex, and volume is larger, and when operation need to consume helium, nitrogen, CO2, production cost is higher.Another kind is Nd:
YAG laser engraving anilox roll, the wavelength of YAG laser are 1.06 microns, and the size of hot spot is CO after focusing2Laser is very
One of, power density is improved, mesh is overcome and the ceramic fusant of leader remaining causes mesh profile not clear enough and roll surface
Not smooth enough problem makes to no longer need to finished machined after laser engraving, has obtained screen density and mesh clarity centainly
Improve, but because beam mode is bad, hot spot or larger after focusing, the line number of processing can only be increased to 600-800 line or so.
Patent application CN201711007554.4 discloses a kind of tungsten carbide anilox roll and its manufacturing method, using low electric work
Rate, internal powder conveying plasma spray system sprayed wc, carry out sealing pores after spraying, seal coat inner via hole avoids external
Medium osmosis etched the matrix.Conventional plasma spraying technology, plasma jet temperature are more than 10000 DEG C, in spraying process, WC
Grain is heated above the decomposition temperature (2755 DEG C) of WC, has also exceeded the melting temperature (2800 DEG C) of WC, and tungsten carbide decomposes tight
Weight, leads to coating hardness and wear resistance decrease.
Supersonic flame spraying is fired using fuel such as kerosene, propane, propylene, using high pressure oxygen or air as liquid
Expect oxidant-combustion-supporting gas, together continuous burning in the combustion chamber, generate high temperature, high-velocity combustion flame stream, burn flame flow velocity degree
Up to 1500m/s or more, powder is sent by flame using axial or radial direction, powder particle is heated to melting or semi-molten shape
State, and 300-500m/s or higher is accelerated to, to obtain the coating of high, densification the high quality of bond strength, flame speed
It is very high, but temperature is relatively low, for WC system powder, can effectively inhibit decomposition of the WC in spraying process, coating is not only
Bond strength is high, and fine and close, and corrosion resistance is good, coefficient of friction is small.
Summary of the invention
The purpose of the present invention is for conventional laser engraving ceramic anilox roller line number is not high, mesh profile is not clear enough, applies
The not high easy to fall off, coating porosity of layer bond strength greatly, is easily stained with ink, and easy cleaning, conventional plasma spraying technology do not cause WC to decompose
It is serious to reduce coating performance the problems such as, providing one kind can be improved line number, mesh contour sharpness and anilox roll corrosion resistance, resistance to
The preparation method of the tungsten carbide coating anilox roll of mill property.
The technical scheme of the present invention is realized as follows:
(1) one layer of tungsten carbide coating is prepared in metalling roll surface with supersonic flame spraying method；
(2) by mechanical grinding processing and it is precise polished；
(3) target line number and mesh form are set, according to the big minor adjustment moving step length of mesh and roller revolving speed, by using more
Light beam, repeatedly strike and monochrome/gray scale engraving technology carve out setting line number and mesh form in roller surface.
Preferably, the supersonic flame spraying is selected from the combustion-supporting flame-spraying of supersonic oxygen, supersonic air helps
Fire one of flame-spraying or a variety of；
Preferably, the metallic roll is selected from one of aluminum metal roller, steel metal roller or a variety of；
Preferably, the tungsten carbide coating includes the coating of WC hard phase；
Preferably, the coating of the WC hard phase is selected from WC-Co, WC-Ni, WC-CoCr, WC-NiCr, WC-CrCNi
One of coating is a variety of；
Preferably, the coating with a thickness of 0.05-1.0mm；
Preferably, step (2) central roll surface roughness grinding and polishing is to Ra < 0.2um；
Preferably, the mesh form is selected from 30 °, 60 ° of hexagons, one of 45 ° of twills, ripple glazes or more
Kind；
Preferably, the line number is 20-1600 line/inch.
The present invention has the following technical effect that compared with the existing technology
(1) preparation method of a kind of tungsten carbide coating anilox roll of the present invention, using supersonic flame spraying method
The sprayed wc coating on aluminium or steel metal roller, coating layer thickness 0.05-1.0mm, including cobalt-based, the carbonization of Ni-based or cobalt chromium base
Tungsten coating.Tungsten carbide coating microhardness 1100-1400HV0.3, coating densification (porosity < 0.5%), bond strength height (>
75MPa), not easily to fall off；
(2) sealing pores, Ra < 0.2um after grinding-polishing, using Hercules nanometers of arteries and veins of Meridian are not necessarily to after spraying
Laser is rushed, using multiple beam, repeatedly strike and monochrome/gray scale engraving technology, screen density is up to 1600 lines/inch, ink cell shape
Shape multiplicity has 30 ° of hexagons, 60 ° of hexagons, and 45 ° of twills, ripple glazes etc., ink cell regular shape is uniform, inner wall smooth, carries ink
Amount is accurate, it is excellent to release ink amount, is not easy to be stained with ink, easy cleaning, significant for printing the printing of high quality；
(3) problem of environmental pollution caused by electrodeposited chromium is avoided, production process is generated without harmful substances such as waste water, waste residues,
Environmental-protecting performance is more excellent；
(4) relative to traditional plasma spraying technology, the decomposition of tungsten carbide is significantly reduced, improves the hardness of coating and resistance to
Performance is ground, product quality and service life are improved.
Detailed description of the invention
Fig. 1 is the combustion-supporting flame-spraying WC coating metallographic microscope of 1 supersonic oxygen of the embodiment of the present invention.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Embodiment 1
(1) the aluminium roller for selecting φ 199.8mm, then by conventional oil removing sandblasting, with the combustion-supporting flame of supersonic oxygen
(HVOF) spray gun spraying WC-10Co-4Cr coating, kerosene 25L/min, oxygen 900L/min are sprayed away from 380mm, workpiece linear velocity
65m/min, powder feeding rate 120g/min, spray-on coating thickness 0.15mm, coating metallographic microscope are as shown in Figure 1；
(2) grinding and size after polishing to φ 200mm, coating layer thickness 0.10mm, finish reach Ra0.05；
(3) Meridian Hercules nanometers of pulse laser is used, using multiple beam, pulse 60 and 120ns, 20mm
Focus lamp, repeatedly strike and gray scale engraving technology, 1600 lines of screen density/inch, 45 ° of twills, ink cell regular shape uniformly, inner wall
It is smooth.
It uses on the machine 12 months, roll surface is not worn, and carries that ink amount is accurate, releases that ink amount is excellent, is not easy to be stained with ink, easy cleaning.
Embodiment 2
(1) steel rider for selecting φ 499.6mm, by conventional oil removing sandblasting, with the combustion-supporting flame of supersonic air (HVAF)
WC-Ni, air 0.55MPa are sprayed, propane 0.48MPa, H2 flow is 30L/min, workpiece linear velocity 120m/min, powder feeding rate
110g/min；
(2) grinding and size after polishing to φ 500mm, coating layer thickness 0.20mm, finish reach Ra0.05；
(3) Meridian Hercules nanometers of pulse laser is used, using multiple beam, pulse 60 and 120ns, 30mm
Focus lamp, repeatedly strike and monochromatic engraving technology, 1500 lines of screen density/inch, 60 ° of twills, ink cell regular shape uniformly, inner wall
It is smooth.
It uses on the machine 10 months, roll surface is not worn, and carries that ink amount is accurate, releases that ink amount is excellent, is not easy to be stained with ink, easy cleaning.
Comparative example 1
(1) the aluminium roller for selecting φ 199.8mm, then by conventional oil removing sandblasting, with low electric power, internal powder conveying plasma
Paint finishing sprays WC-10Co-4Cr coating, spray-on coating thickness 0.15mm；
(2) sealing pores, the through-hole in seal coat are carried out after spraying；
(3) grinding and size after polishing to φ 200mm, coating layer thickness 0.10mm, finish reach Ra0.05；
(4) Meridian Hercules nanometers of pulse laser is used, using multiple beam, pulse 60 and 120ns, 20mm
Focus lamp, repeatedly strike and gray scale engraving technology, 1600 lines of screen density/inch, 45 ° of twills, ink cell regular shape uniformly, inner wall
It is smooth.
Comparative example 2
(1) steel rider for selecting φ 499.6mm, by conventional oil removing sandblasting, with low electric power, internal powder conveying plasma spraying
System sprays WC-Ni；
(2) sealing pores, the through-hole in seal coat are carried out after spraying；
(3) grinding and size after polishing to φ 500mm, coating layer thickness 0.20mm, finish reach Ra0.05；
(4) Meridian Hercules nanometers of pulse laser is used, using multiple beam, pulse 60 and 120ns, 30mm
Focus lamp, repeatedly strike and monochromatic engraving technology, 1500 lines of screen density/inch, 60 ° of twills, ink cell regular shape uniformly, inner wall
It is smooth.
Verify example 1
The anilox roll obtained according to method in embodiment 1-2, comparative example 1-2 is taken to be tested for the property respectively, test result
It is as shown in table 1:
Table 1
As can be seen from Table 1, the anilox roll that the supersonic flame spraying method is prepared according to the present invention, relative to
The anilox roll obtained in the prior art using plasma method spraying, porosity is lower, and hardness is higher, and fracture toughness is stronger,
Bond strength is higher, and coefficient of friction is smaller, and various aspects of performance is significantly improved；And it is kept away using supersonic flame spraying method
Exempt from Plasma Spraying Process Using high temperature treatment process, can effectively reduce the decomposition of tungsten carbide, improves the hardness of coating and wear-resisting
Performance improves product quality and service life；Meanwhile using supersonic flame spraying method, after being sprayed, without carrying out
Sealing pores, production efficiency is higher, and cost is cheaper.
The above specific embodiment part has carried out specific Jie to anilox roll according to the present invention and preparation method thereof
It continues.It should be noted that above-mentioned introduction is only to assist in those skilled in the art, methods of this invention will be better understood and thinks
Road, rather than the limitation to related content.Without departing from the principles of the present invention, those skilled in the art can also be to this
Invention, which carries out adjustment or modification, above-mentioned adjustment and modification appropriate, should also be as belonging to the scope of protection of the present invention.
Claims (9)
1. a kind of preparation method of tungsten carbide anilox roll, which is characterized in that described method includes following steps:
(1) one layer of tungsten carbide coating is prepared in metalling roll surface with supersonic flame spraying method；
(2) by mechanical grinding processing and it is precise polished；
(3) target line number and mesh form are set, according to the big minor adjustment moving step length of mesh and roller revolving speed, by using mostly light
Beam, repeatedly strike and monochrome/gray scale engraving technology carve out setting line number and mesh form in roller surface.
2. preparation method according to claim 1, which is characterized in that the supersonic flame spraying is selected from supersonic oxygen
One of combustion-supporting flame-spraying, the combustion-supporting flame-spraying of supersonic air are a variety of.
3. preparation method according to claim 1, which is characterized in that the metallic roll is selected from aluminum metal roller, steel metal roller
One of or it is a variety of.
4. preparation method according to claim 1, which is characterized in that the tungsten carbide coating is the painting comprising WC hard phase
Layer.
5. the preparation method according to claim 4, which is characterized in that the coating of the tungsten carbide hard phase be selected from WC-Co,
One of WC-Ni, WC-CoCr, WC-NiCr, WC-CrCNi coating is a variety of.
6. the preparation method according to claim 4, which is characterized in that the coating with a thickness of 0.05-1.0mm.
7. preparation method according to claim 1, which is characterized in that step (2) the central roll surface roughness grinding and polishing to Ra
< 0.2um.
8. preparation method according to claim 7, which is characterized in that the mesh form is selected from 30 ° of hexagons, 60 ° six
It is angular, one of 45 ° of twills, ripple glazes or a variety of.
9. preparation method according to claim 7, which is characterized in that the line number is 20-1600 line/inch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910204927.XA CN109825790A (en) | 2019-03-18 | 2019-03-18 | A kind of manufacturing method of tungsten carbide coating anilox roll |
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| CN201910204927.XA CN109825790A (en) | 2019-03-18 | 2019-03-18 | A kind of manufacturing method of tungsten carbide coating anilox roll |
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ID=66870519
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110205579A (en) * | 2019-06-14 | 2019-09-06 | 广东省新材料研究所 | A kind of plasma spraying rewind roll and preparation method thereof |
| CN110280439A (en) * | 2019-07-29 | 2019-09-27 | 广东省新材料研究所 | Applicator roll, its application and preparation method |
| CN110565041A (en) * | 2019-09-25 | 2019-12-13 | 武汉虹之彩包装印刷有限公司 | Preparation method of tungsten carbide offset printing water roller |
| CN110965006A (en) * | 2019-12-30 | 2020-04-07 | 广东省新材料研究所 | Spray gun for thermally spraying inner hole, inner hole thermal spraying method and tungsten carbide coating |
| CN111617926A (en) * | 2020-07-10 | 2020-09-04 | 广州粤鑫激光科技有限公司 | Coating roller, preparation method and application thereof, and copper-clad plate |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110205579A (en) * | 2019-06-14 | 2019-09-06 | 广东省新材料研究所 | A kind of plasma spraying rewind roll and preparation method thereof |
| CN110280439A (en) * | 2019-07-29 | 2019-09-27 | 广东省新材料研究所 | Applicator roll, its application and preparation method |
| CN110565041A (en) * | 2019-09-25 | 2019-12-13 | 武汉虹之彩包装印刷有限公司 | Preparation method of tungsten carbide offset printing water roller |
| CN110965006A (en) * | 2019-12-30 | 2020-04-07 | 广东省新材料研究所 | Spray gun for thermally spraying inner hole, inner hole thermal spraying method and tungsten carbide coating |
| CN111617926A (en) * | 2020-07-10 | 2020-09-04 | 广州粤鑫激光科技有限公司 | Coating roller, preparation method and application thereof, and copper-clad plate |
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Application publication date: 20190531 |