CN102990308B - Laser grooving machining method of dry gas seal spiral groove - Google Patents
Laser grooving machining method of dry gas seal spiral groove Download PDFInfo
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- CN102990308B CN102990308B CN201210528980.3A CN201210528980A CN102990308B CN 102990308 B CN102990308 B CN 102990308B CN 201210528980 A CN201210528980 A CN 201210528980A CN 102990308 B CN102990308 B CN 102990308B
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Abstract
The invention discloses a laser grooving machining method of a dry gas seal spiral groove, wherein a machining device is a 20W optical fiber marking machine. The machining method comprises the following steps of: (1) designing the shape of the dry gas seal spiral groove by special drawing software; (2) positioning, wherein a ring with outer diameter being is less than or equal to 100mm is positioned in a marking range, and a ring with outer diameter being more than 100mm is positioned by a groove-to-groove machining method; and (3) grooving which is implemented by selecting appropriate marking parameters of focal length, marking speed, effective vector step length, power, frequency and the like. The laser grooving method has the characteristics of having a wide application range, being applicable to machining surfaces of different materials and different shapes, ensuring no mechanical deformation of workpieces, no pollution, high speed, high accuracy, good repeatability, high automation degree, and the like, is used for machining logarithm spiral grooves, rectangular grooves and dual-trapezoid grooves, is especially suitable for machining shallow grooves, and has obvious effects of improving product quality and machining efficiency.
Description
Technical field
The present invention relates to a kind of spiral fluted processing method, relate to a kind of dry gas seals spiral fluted laser grooving processing method specifically.
Background technology
At present, dry gas seals application is more and more extensive, and the dynamic pressure groove on sealing ring is the core technology of dry gas seals, and the quality of its crudy determines the performance of product.In the process of research and development dry gas seals product, the greatest problem run into is how cutting on sealing ring, although consulted a large amount of documents and data, these documents and data just bias toward the theoretical research to various flute profile, introduce various computational methods, to reach the optimized design of flute profile.But for how to process flute profile, specifically do not discuss.
Summary of the invention
For existing dry gas seals machining spiral groove method aspect Problems existing, the invention provides the dry gas seals spiral fluted laser grooving processing method that a kind of method is simple, speed is fast, precision is high, reproducible, automaticity is high.
The concrete technical measures solved the problems of the technologies described above are:
A kind of dry gas seals spiral fluted laser grooving processing method, is characterized in that:
(1) process equipment
Processing external diameter is less than or equal to the sealing ring 5 of 100mm, uses 20W optical fiber marking machine 1; Processing diameter is greater than the sealing ring 5 of 100mm, and 20W optical fiber marking machine 1 is installed XY axle Feed table 2 and the indexing accuracy 1 " rotary table 3 of/lattice of a precision 0.02mm;
(2) processing method
1. designing flute profile: for processing qualified flute profile at sealing ring end face, first should design flute profile, applying the dry gas seals helicla flute of special mapping software design, it is made up of dynamic pressure groove 10, the two sections of logatithmic spirals sealing weir 20 and sealing dam 30 and circular arc;
2. locate
A. when the external diameter of sealing ring 5 is less than or equal to 100mm, inner position in mark scope: the ring plate of often kind of different-diameter all needs positioning mould for processing 51, the centre bore 52 that diameter is less than 0.5mm is got out at positioning clamping fixture 51 center, adjustment XY Feed table 2, mold centre bore 52 is overlapped with laser spots, the position line circle 53 concentric with centre bore is got in addition at mold surface laser, diameter is less than mold diameter 5 ~ 10mm, measure circle to the marginate distance of tire, finely tune XY Feed table 2 again, the concentricity of the two is made to be less than or equal to 0.05mm, the endoporus of sealing ring and the excircle orientation of mold, both are through grinding, mold Quenching Treatment, gap is less than or equal to 0.02mm,
B. the location when external diameter of sealing ring 5 is greater than 100mm: take the way by slot machining, locate according to the method for aforementioned a before processing, behind ring plate location, sealing ring 5 is made to move to L in Y direction by XY worktable 2, at least can there is a groove within the scope of mark, allow helicla flute offset L distance when mapping simultaneously, add man-hour, first the groove be positioned within mark scope is carved, then by rotary table 3 calibration one by one, when the movement by sealing ring 5, when can place two or more helicla flute within mark scope, multiple groove is disposable to be got;
3. cutting
Cutting parameter is as follows:
Focal length: 250 ~ 260mm;
Mark speed: 1000 ~ 2000mm/s;
Effective vector step-length: 0.01mm;
Power: 40% ~ 90%;
Frequency: 5 ~ 10kHz.
Beneficial effect of the present invention: Laser Processing is the high-energy utilizing laser, carries out a kind of hot worked method of industry, and material can be vaporized, melts and remove by laser within the extremely short time.Compare with other processing method, laser incising channel process has widely applicable, all applicable to different materials, difform finished surface, there is the distortion of workpiece mechanical, pollution-free, speed is fast, precision is high, reproducible, automaticity high, be particularly useful for shallow slot processing.The present invention utilizes 20W optical fiber marking machine to carry out laser grooving, and processing method is simple, and speed is fast, precision is high, reproducible, and automaticity is high, for processing the flute profiles such as logarithmic spiral groove, rectangular channel, double trapezoid groove, to improve the quality of products and working (machining) efficiency has significant effect.
Accompanying drawing explanation
Fig. 1 is dry gas seals spiral fluted structural representation;
Fig. 2 is the structural representation of dry gas seals machining spiral groove equipment;
Fig. 3 is the cutting location schematic diagram of external diameter within cutting scope of ring;
Fig. 4 is the cutting location schematic diagram that the external diameter of ring is greater than 100mm.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is elaborated.
A kind of dry gas seals spiral fluted laser grooving processing method,
(1) process equipment
The core process equipment of laser grooving is the 20W optical fiber marking machine that Dazu Laser Science & Tech Co Ltd, Shenzhen City manufactures, the positioning precision of its hot spot and the smoothness of lines can reach 0.001mm, be specially adapted to mark repeatedly, the degree of depth, smoothness, fineness are had to the occasion of strict demand, mark scope 100 × 100mm, excessive mark scope will affect power density and the mark precision of hot spot.In the process of cutting, require that the dynamic pressure groove carved is uniform centered by the center of circle of ring, therefore must ensure that the center of circle of laser spot center and ring is in same point, this carries out centering with regard to needs before mark.In order to ensure centering precision and expand the range of work, processing can exceed mark scope, diameter is greater than the sealing ring of 100mm, marking machine has been set up on 1 XY axle Feed table 2 and the indexing accuracy 1 " rotary table 3 of/lattice of a feed accuracy 0.02mm respectively, laser head 4, sealing ring 5 is placed on rotary table 3, as shown in Figure 2, sealing ring is fixed on the working face of rotary table 3 by the mold of designed, designed, ensure that the center of circle of sealing ring and the deviation in the working face center of circle control within 0.02mm, sealing ring XY direction can be realized by such transformation adjust accurately and locate.
2) processing method
1. flute profile is designed
For processing qualified flute profile at sealing ring end face, first should design flute profile, as shown in Figure 1, apply the dry gas seals helicla flute of special mapping software design, it is by dynamic pressure groove 10, and two sections of logatithmic spirals and the circular arc on sealing weir 20 and sealing dam 30 are formed.
2.location
A. as shown in Figure 3, sealing ring 5 can be placed within the mark scope shown in dotted line the locating and machining when the external diameter of sealing ring 5 is less than or equal to 100mm, and the helicla flute on sealing ring 5 can once be got.The sealing ring of often kind of different-diameter all needs positioning mould for processing 51, when machining mould 51, the centre bore 52 that diameter is less than 0.5mm is got out at mold 51 center, by adjustment XY Feed table 2, mold centre bore 52 is overlapped with the laser spots of laser head 4, do like this, can't ensure that hot spot is concentric with the center of circle of mold completely, therefore, also need mold surface laser get one with centre bore concentric position line circle 53, its diameter is less than mold cylindrical 5 ~ 10mm, measure circle to the marginate distance of tire, again by fine setting XY Feed table 2, make the two with one heart, the concentricity of both guarantees is less than or equal to 0.05mm, sealing ring is by the excircle orientation of endoporus and mold, both are through grinding, mold Quenching Treatment, gap is less than or equal to 0.02mm, the helicla flute processed like this and the deviation at center can be less than 0.1mm.
B. as shown in Figure 4, at this moment the size of ring exceeds mark scope to the process when the external diameter of sealing ring 5 is greater than 100mm, and the helicla flute that ring distributes can not disposablely be got, and therefore must take the way by slot machining.Also be the first centering of palpus before processing, same Fig. 3 of method of centering.After ring plate centering, making ring move L distance in Y direction by XY worktable, at least can ensure a groove within mark scope, thread groove also will be allowed when mapping simultaneously to offset L distance.Add man-hour, first the groove be positioned within mark scope is carved, then by rotary table calibration, because groove is uniform on circle, so the angle value of calibration is each time the same, has how many grooves, just need calibration how many times.Also have a kind of situation, when the movement by ring, when can place two or more helicla flute within mark scope, these grooves can once be got, and like this, can reduce calibration number of times, improve cutting efficiency.
3.cutting
Cutting technique is with reference to the cutting Selecting parameter of conventional 20W optical fiber marking machine, and the helicla flute degree of depth of dry gas seals is 0.0025 ~ 0.01mm, in order to process qualified groove depth, must select suitable mark parameter.The parameter affecting groove depth has focal length, mark speed, effectively vector step-length, power, frequency etc.Laser is the light beam that energy height is concentrated, and only just can process at focal plane, therefore must focus before each cutting, make laser spot be focused on sealing ring surface, obtain best cutting effect.In actual cutting process, helix is the small straight line convergence walked by laser spots, and this will control effective vector step-length well, and step-length is larger, and lines are more coarse; Step-length is less, and efficiency is lower; Power is the intensity of marking machine Output of laser, and the laser intensity required for different materials is different; Frequency is the quantity of unit interval inner laser point, controls this parameter, has material impact to the flatness of groove depth and bottom land, and mark rate is to the roughness of groove face.Suitable mark parameter is as follows:
Focal length: 250 ~ 260mm;
Mark speed: 1000 ~ 2000mm/s;
Effective vector step-length: 0.01mm;
Power: 40% ~ 90%;
Frequency: 5 ~ 10kHz.
Claims (1)
1. a dry gas seals spiral fluted laser grooving processing method, is characterized in that:
(1) process equipment
Processing external diameter is less than or equal to the sealing ring (5) of 100mm, uses 20W optical fiber marking machine (1); Processing diameter is greater than the sealing ring (5) of 100mm, at XY Feed table (2) and the indexing accuracy 1 " rotary table (3) of/lattice of the upper installation precision 0.02mm of 20W optical fiber marking machine (1);
(2) processing method
1. flute profile is designed
For processing qualified flute profile at sealing ring end face, first should design flute profile, apply the dry gas seals helicla flute of special mapping software design, it is made up of dynamic pressure groove (10), the two sections of logatithmic spirals sealing weir (20) and sealing dam (30) and circular arc;
2. locate
A. when the external diameter of sealing ring (5) is less than or equal to 100mm, inner position in mark scope: the ring plate of often kind of different-diameter all needs positioning mould for processing (51), the centre bore (52) that diameter is less than 0.5mm is got out at positioning clamping fixture (51) center, adjustment XY Feed table, mold centre bore (52) is overlapped with laser spots, position line circle (53) concentric with centre bore is got in addition at mold surface laser, diameter is less than mold diameter 5 ~ 10mm, measure circle to the marginate distance of tire, finely tune XY Feed table again, the concentricity of the two is made to be less than or equal to 0.05mm, the endoporus of sealing ring and the excircle orientation of mold, both are through grinding, mold Quenching Treatment, gap is less than or equal to 0.02mm,
B. the location when external diameter of sealing ring (5) is greater than 100mm: take the way by slot machining, locate according to the method for aforementioned (a) before processing, behind ring plate location, sealing ring (5) is made to move L distance in Y direction by XY Feed table (2), at least can there is a groove within the scope of mark, allow helicla flute offset L distance when mapping simultaneously, add man-hour, first the groove be positioned within mark scope is carved, then by rotary table (3) calibration one by one, when the movement by sealing ring (5), when can place two or more helicla flute within mark scope, multiple groove is disposable to be got,
3. cutting
Cutting parameter is as follows:
Focal length: 250 ~ 260mm;
Mark speed: 1000 ~ 2000mm/s;
Effective vector step-length: 0.01mm;
Power: 40% ~ 90%;
Frequency: 5 ~ 10kHz.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210528980.3A CN102990308B (en) | 2012-12-11 | 2012-12-11 | Laser grooving machining method of dry gas seal spiral groove |
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| CN201210528980.3A CN102990308B (en) | 2012-12-11 | 2012-12-11 | Laser grooving machining method of dry gas seal spiral groove |
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| CN102990308B true CN102990308B (en) | 2015-05-13 |
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| DE102013217515A1 (en) | 2013-09-03 | 2015-03-05 | Robert Bosch Gmbh | Arrangement with a fuel feeder and several holders |
| CN103753145A (en) * | 2014-01-20 | 2014-04-30 | 华侨大学 | Method for manufacturing small molds |
| CN103934727B (en) * | 2014-04-09 | 2016-04-06 | 大连理工大学 | A kind of equiangular helical spiral subregion variable element control precision machining method |
| CN106735915A (en) * | 2016-11-22 | 2017-05-31 | 天津航空机电有限公司 | A kind of stainless steel laser of anti-corrosion is carved characters method |
| KR102363628B1 (en) * | 2018-10-31 | 2022-02-16 | 엔오케이 가부시키가이샤 | Surface processing method and sealing device of the disk member of the sealing device |
| CN110091125B (en) * | 2019-04-12 | 2020-06-23 | 沈阳透平机械股份有限公司 | Method for machining water line of sealing surface of air duct flange of compressor for pipeline |
| CN111889893B (en) * | 2020-07-07 | 2021-12-03 | 江苏海洋大学 | Ultrashort pulse laser precision machining method for dry gas sealed micron-sized groove |
| CN112570778B (en) * | 2020-11-27 | 2022-04-01 | 上海五钢设备工程有限公司 | Method for equally dividing circumference of irregular spiral groove |
| CN114603247B (en) * | 2022-04-18 | 2024-04-05 | 昆明理工大学 | ACE method-based efficient and precise dry gas seal spiral groove laser machining method |
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| JP2007069393A (en) * | 2005-09-05 | 2007-03-22 | Ntn Corp | Method for forming dynamic pressure groove |
| CN1978210A (en) * | 2005-11-29 | 2007-06-13 | 武汉矽感科技有限公司 | Laser marking system and method for automatic production line |
| CN201168887Y (en) * | 2008-03-11 | 2008-12-24 | 上海大量光电科技有限公司 | Rotating localization jigs |
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| JP2007069393A (en) * | 2005-09-05 | 2007-03-22 | Ntn Corp | Method for forming dynamic pressure groove |
| CN1978210A (en) * | 2005-11-29 | 2007-06-13 | 武汉矽感科技有限公司 | Laser marking system and method for automatic production line |
| CN201168887Y (en) * | 2008-03-11 | 2008-12-24 | 上海大量光电科技有限公司 | Rotating localization jigs |
| JP2010180919A (en) * | 2009-02-04 | 2010-08-19 | Uchiyama Manufacturing Corp | Gasket structure |
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