CN104043502B - The overlaying-type roller shell of Raymond bowl mill and the segmentation overlaying method of roller shell overlay cladding thereof - Google Patents
The overlaying-type roller shell of Raymond bowl mill and the segmentation overlaying method of roller shell overlay cladding thereof Download PDFInfo
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- CN104043502B CN104043502B CN201310079070.6A CN201310079070A CN104043502B CN 104043502 B CN104043502 B CN 104043502B CN 201310079070 A CN201310079070 A CN 201310079070A CN 104043502 B CN104043502 B CN 104043502B
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Abstract
The invention discloses a kind of overlaying-type roller shell of Raymond bowl mill, comprise the roller shell parent of taper, the size two ends of roller shell parent are respectively arranged with annular protrusion, and the height of large end projection is greater than the height of small end projection; The outer surface of roller shell parent is provided with roller shell overlay cladding; Roller shell overlay cladding extends to small end projection from large end projection; Roller shell overlay cladding is divided into four sections, and the first built-up welding Duan Yu great being in the large end of roller shell parent holds the summation of protruding axial dimension to account for 1/3 of the axial dimension of roller shell parent.The present invention is according to the actual wear characteristic of Raymond bowl mill roller shell when milling the raw coal containing more coal ore, pyrite, quartz sand etc., rationally determine the shape of roller shell overlay cladding, and adopt the method for segmentation built-up welding, the anti-wear performance of resurfacing welding material can be given full play to, effectively improve the service life of the roller shell abrading section of Raymond bowl mill.The invention also discloses a kind of segmentation overlaying method of roller shell overlay cladding.
Description
Technical field
The present invention relates to a kind of Raymond bowl mill, be specifically related to a kind of overlaying-type roller shell of Raymond bowl mill.The invention still further relates to a kind of segmentation overlaying method of overlaying-type roller shell of Raymond bowl mill.
Background technology
At present, the whole world is all faced with the situation of energy scarcity, and suitable proportion has been occupied in thermal power generation in energy resource structure.
Raymond bowl mill in steam power plant needs to use overlaying-type roller shell, and existing overlaying-type roller shell as shown in Figure 1, comprises the roller shell parent 1 of taper, and the outer surface of roller shell parent 1 is provided with roller shell overlay cladding 2.The overlaying-type roller shell of this structure, its roller shell overlay cladding 2 is the methods adopting bimetal composite hard-face overlaying welding, and roller shell overlay cladding 2 is directly covered on roller shell parent 1.
In use, because different colm and roller shell surface extrude, produce wearing and tearing, make the utilization rate of roller shell overlay cladding low, the service life of roller shell is short.
In addition, the method for existing bimetal composite hard-face overlaying welding, manufactures abnormal difficult, easily causes welding material fusion character and poor compatibility, do not reach the wear-resisting requirement in service life according to expection.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of overlaying-type roller shell of Raymond bowl mill, and it can improve the service life of roller shell greatly.
For solving the problems of the technologies described above, the technical solution of the overlaying-type roller shell of Raymond bowl mill of the present invention is:
Comprise the roller shell parent of taper, the size two ends of roller shell parent are respectively arranged with annular protrusion, and the height of large end projection is greater than the height of small end projection; Large end is protruding, small end is protruding and roller shell parent is formed in one;
The outer surface of roller shell parent is provided with roller shell overlay cladding; Roller shell overlay cladding extends to small end projection from large end projection;
Roller shell overlay cladding is divided into four sections, and the first built-up welding Duan Yu great being in the large end of roller shell parent holds the summation of protruding axial dimension to account for 1/3 of the axial dimension of roller shell parent.
The one-sided cross section of described large end projection is triangle; The one-sided cross section of described small end projection is trapezoidal.
The present invention also provides a kind of segmentation overlaying method of roller shell overlay cladding of overlaying-type roller shell of Raymond bowl mill, and form roller shell overlay cladding at the outer surface of roller shell parent, its technical solution is, comprises the following steps:
The first step, fixes roller shell parent by frock; Manipulator is fixed on crosshead;
Second step, is installed on deflection machine by the frock that roller shell parent is housed; Rotate deflection machine, adjustment roller shell parent is to horizontal level;
3rd step, in outer surface built-up welding first built-up welding section, the second built-up welding section, the 3rd built-up welding section, the 4th built-up welding section respectively of roller shell parent, until heap is welded to the physical dimension of regulation;
Built-up welding adopts material to be the welding wire of high-alloy steel adding Alloy Elements Mo, B, Nb, rare earth, joins SH107 solder flux;
Every block built-up welding section is carried out according to following technological specification:
The weld procedure specification of the first built-up welding section is: welding current I=480 ~ 540A, weldingvoltage U=29 ~ 31V, welding speed V=50 m/h;
The weld procedure specification of the second built-up welding section is: welding current I=450 ~ 500A, weldingvoltage U=28 ~ 30V, welding speed V=45 m/h;
The weld procedure specification of the 3rd built-up welding section is: welding current I=480 ~ 520A, weldingvoltage U=28 ~ 29V, welding speed V=60 m/h;
The weld procedure specification of the 4th built-up welding section is: welding current I=500 ~ 550A, weldingvoltage U=30 ~ 32V, welding speed V=55 m/h.
Described overlaying method is as follows:
Operation one, first built-up welding second built-up welding section, weldering 1/3rd thickness; Built-up welding first built-up welding section again, weldering 1/2nd thickness; Then built-up welding the 3rd built-up welding section, weldering 1/2nd thickness; Last built-up welding the 4th built-up welding section, weldering 1/4th thickness;
Operation two, first built-up welding first built-up welding section, weldering 1/4th thickness; Built-up welding second built-up welding section again, weldering 1/3rd thickness; Then built-up welding the 3rd built-up welding section, weldering 1/4th thickness; Last built-up welding the 4th built-up welding section, weldering 1/2nd thickness;
Operation three, 1/3rd thickness of first built-up welding second built-up welding section remainder; / 4th thickness of built-up welding the 3rd built-up welding section remainder again; Then 1/4th thickness of built-up welding first built-up welding section remainder; / 4th thickness of last built-up welding the 4th built-up welding section remainder;
Operation four, covers two-layer overlay cladding at the outer surface of the first built-up welding section, the second built-up welding section, the 3rd built-up welding section and the 4th built-up welding section, makes the physical dimension that the roller shell overlay cladding of roller shell parent outer surface conforms with the regulations.
Wherein, for the combined material of the welding wire employing high-chromium cast iron alloy+martensitic alloy of described first built-up welding section;
Welding wire for described second built-up welding section adopts high-chromium cast iron alloy material;
Welding wire for described 3rd built-up welding section adopts the combined material of high-chromium cast iron alloy+martensitic alloy;
Welding wire for described 4th built-up welding section adopts martensitic alloy material.
The technique effect that the present invention can reach is:
The present invention is according to the actual wear characteristic of Raymond bowl mill roller shell when milling the raw coal containing more coal ore, pyrite, quartz sand etc., rationally determine the shape of roller shell overlay cladding, and adopt the method for segmentation built-up welding, overcome existing technique for overlaying and roller shell wearing character poor compatibility, the defects such as roller shell overlay cladding utilization rate low and roller shell life-span is low, the anti-wear performance of resurfacing welding material can be given full play to, effectively improve the service life of the roller shell abrading section of Raymond bowl mill.
Roller shell of the present invention adopts special roller shell overlay cladding shape, can adaptation condition service condition, greatly can improve the utilization rate of roller shell overlay cladding, and improve the service life of roller shell.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the schematic diagram of prior art overlaying-type roller shell;
Fig. 2 is the schematic diagram of overlaying-type roller shell of the present invention;
Fig. 3 is the state of wear schematic diagram of existing overlaying-type roller shell.
Description of reference numerals in figure:
1 is roller shell parent, and 2 is roller shell overlay cladding,
3 is roller shell overlay cladding, and 4 is roller shell parent,
31 is the first built-up welding section, and 32 is the second built-up welding section,
33 is the 3rd built-up welding section, and 34 is the 4th built-up welding section,
41 for hold projection greatly, and 42 is that small end is protruding.
Detailed description of the invention
As shown in Figure 2, the overlaying-type roller shell of Raymond bowl mill of the present invention, comprises the roller shell parent 4 of taper, and the size two ends of roller shell parent 4 are respectively arranged with annular protrusion, and the one-sided cross section of large end protruding 41 is triangle, and the one-sided cross section of small end projection 42 is trapezoidal;
The height of large end projection 41 is greater than the height of small end projection 42;
Large end projection 41, small end protruding 42 and roller shell parent 4 are formed in one;
The outer surface of roller shell parent 4 is provided with roller shell overlay cladding 3; Roller shell overlay cladding 3 extends to small end projection 42 from large end protruding 41;
Roller shell overlay cladding 3 is divided into four sections, and the first built-up welding section 31 being in the large end of roller shell parent 4 accounts for 1/3 of the axial dimension L of roller shell parent 4 with holding greatly the summation of the axial dimension of protruding 41.
The present invention is directed to the actual wear situation of roller shell, by changing the outer shape of roller shell parent, the two ends of roller shell parent are provided with annular protrusion, this annular protrusion can replace the roller shell overlay cladding at two ends, not only solve the problem of the shaping difference in two ends of roller shell overlay cladding, and the volume of actual roller shell overlay cladding can be reduced, overlay cladding can be fully used in actual use, thus reach the object improving overlay cladding utilization rate.
Wearing and tearing due to roller shell overlay cladding mainly occur between the region in roller shell parent stage casing 1/3rd, the overlay cladding wearing and tearing at two ends are obviously less, the present invention is by changing the shape of roller shell overlay cladding, the roller shell overlay cladding at two ends is replaced with roller shell parent, effectively can utilize overlay cladding, the utilization rate of overlay cladding is improved.
The segmentation overlaying method of roller shell overlay cladding of the present invention, forms roller shell overlay cladding 3 at the outer surface of roller shell parent 4, comprises the following steps:
The first step, fixes roller shell parent 4 by frock; Three manipulators are fixed on crosshead;
Second step, is installed on deflection machine by the frock that roller shell parent 4 is housed; Rotate deflection machine, and adjustment roller shell parent 4 to horizontal level (i.e. the axis horizontal of roller shell parent 4, as shown in Figure 2);
3rd step, in outer surface built-up welding first built-up welding section 31, second built-up welding section 32, the 3rd built-up welding section 33, the 4th built-up welding section 34 respectively of roller shell parent 4, until heap is welded to the physical dimension of regulation;
Built-up welding adopts the welding wire that diameter is Φ 3.2mm, material is the high-alloy steel adding the alloying elements such as Mo, B, Nb, rare earth, joins SH107 solder flux;
Wherein for the combined material of the welding wire employing high-chromium cast iron alloy+martensitic alloy of the first built-up welding section 31;
Welding wire for the second built-up welding section 32 adopts high-chromium cast iron alloy material;
Welding wire for the 3rd built-up welding section 33 adopts the combined material of high-chromium cast iron alloy+martensitic alloy;
Welding wire for the 4th built-up welding section 34 adopts martensitic alloy material;
Every block built-up welding section is carried out according to following technological specification:
The weld procedure specification of the first built-up welding section 31 is: welding current I=480 ~ 540A, weldingvoltage U=29 ~ 31V, welding speed V=50 m/h;
The weld procedure specification of the second built-up welding section 32 is: welding current I=450 ~ 500A, weldingvoltage U=28 ~ 30V, welding speed V=45 m/h;
The weld procedure specification of the 3rd built-up welding section 33 is: welding current I=480 ~ 520A, weldingvoltage U=28 ~ 29V, welding speed V=60 m/h;
The weld procedure specification of the 4th built-up welding section 34 is: welding current I=500 ~ 550A, weldingvoltage U=30 ~ 32V, welding speed V=55 m/h;
Concrete overlaying method is as follows:
Operation one, first built-up welding second built-up welding section 32, weldering 1/3rd thickness; Built-up welding first built-up welding section 31 again, weldering 1/2nd thickness; Then built-up welding the 3rd built-up welding section 33, weldering 1/2nd thickness; Last built-up welding the 4th built-up welding section 34, weldering 1/4th thickness;
Operation two, first built-up welding first built-up welding section 31, weldering 1/4th thickness; Built-up welding second built-up welding section 32 again, weldering 1/3rd thickness; Then built-up welding the 3rd built-up welding section 33, weldering 1/4th thickness; Last built-up welding the 4th built-up welding section 34, weldering 1/2nd thickness;
Operation three, 1/3rd thickness of first built-up welding second built-up welding section 32 remainder; / 4th thickness of built-up welding the 3rd built-up welding section 33 remainder again; Then 1/4th thickness of built-up welding first built-up welding section 31 remainder; / 4th thickness of last built-up welding the 4th built-up welding section 34 remainder;
Operation four, covers two-layer overlay cladding at the outer surface of the first built-up welding section 31, second built-up welding section 32, the 3rd built-up welding section 33 and the 4th built-up welding section 34, makes the physical dimension that the roller shell overlay cladding 3 of roller shell parent 4 outer surface conforms with the regulations.
Welding wire of the present invention adopts material to be the high-alloy steel adding the alloying elements such as Mo, B, Nb, rare earth, the wearability of this solder wire material is good, the hardness (anti-plasticity) in the softer matrix face of layer can be improved, thus reduce the volume of overlay cladding, improve the practical efficiency of overlay cladding, reduce the manufacturing cost of roller shell.
The alloying elements such as Mo, B, Nb, rare earth are added in welding wire of the present invention, the abrasive wear that the hardness particle diameter and distribution of the carbide hard phase of layer can be made to be conducive to hardness mineral in anti-coal reduces alloying pellet and comes off, anti-wear performance is stepped to a new level, all the other positions rationally add, or reduce raising alloying element, meet the needs of wearability, remarkable in economical benefits.
The present invention can solve the fusion character of the grinding roller shape chamber built-up welding of piecemeal and compatible technical barrier.
Because all greatest wear positions of Raymond bowl mill roller shell are all about from large end 1/3rd positions, as shown in Figure 3, if directly built-up welding, not only can not reach the requirement of the wear-resisting use life expectancy of abrasive wear, and the realization of this process, difficulty is comparatively large, and is not easy to realize.The present invention is according to abrasive wear curve and can grind coefficient, adopts the method for segmentation built-up welding to improve the friction durability of roller shell overlay cladding.
Segmentation overlaying method of the present invention can solve in a section parts, and four kinds of materials can fuse mutually, reaches the technical barrier of compatible match materials again.
The present invention can change the shape of roller shell overlay cladding, can reduce resurfacing welding material about 20%, thus greatly improves the utilization rate of overlay cladding, and the price due to overlay cladding is higher than the price of roller shell parent a lot, therefore greatly can reduce the manufacturing cost of roller shell like this.
Claims (3)
1. a segmentation overlaying method for the roller shell overlay cladding of the overlaying-type roller shell of Raymond bowl mill, forms roller shell overlay cladding at the outer surface of roller shell parent, it is characterized in that, comprise the following steps:
The first step, fixes roller shell parent by frock; Manipulator is fixed on crosshead;
Second step, is installed on deflection machine by the frock that roller shell parent is housed; Rotate deflection machine, adjustment roller shell parent is to horizontal level;
3rd step, in outer surface built-up welding first built-up welding section, the second built-up welding section, the 3rd built-up welding section, the 4th built-up welding section respectively of roller shell parent, until heap is welded to the physical dimension of regulation;
Built-up welding adopts material to be the welding wire of high-alloy steel adding Alloy Elements Mo, B, Nb, rare earth, joins SH107 solder flux;
Every block built-up welding section is carried out according to following technological specification:
The weld procedure specification of the first built-up welding section is: welding current I=480 ~ 540A, weldingvoltage U=29 ~ 31V, welding speed V=50 m/h;
The weld procedure specification of the second built-up welding section is: welding current I=450 ~ 500A, weldingvoltage U=28 ~ 30V, welding speed V=45 m/h;
The weld procedure specification of the 3rd built-up welding section is: welding current I=480 ~ 520A, weldingvoltage U=28 ~ 29V, welding speed V=60 m/h;
The weld procedure specification of the 4th built-up welding section is: welding current I=500 ~ 550A, weldingvoltage U=30 ~ 32V, welding speed V=55 m/h.
2. the segmentation overlaying method of the roller shell overlay cladding of the overlaying-type roller shell of Raymond bowl mill according to claim 1, is characterized in that: the welding wire for described first built-up welding section adopts the combined material of high-chromium cast iron alloy+martensitic alloy;
Welding wire for described second built-up welding section adopts high-chromium cast iron alloy material;
Welding wire for described 3rd built-up welding section adopts the combined material of high-chromium cast iron alloy+martensitic alloy;
Welding wire for described 4th built-up welding section adopts martensitic alloy material.
3. the segmentation overlaying method of the roller shell overlay cladding of the overlaying-type roller shell of Raymond bowl mill according to claim 1, is characterized in that: the overlaying method of described 3rd step is as follows:
Operation one, first built-up welding second built-up welding section, weldering 1/3rd thickness; Built-up welding first built-up welding section again, weldering 1/2nd thickness; Then built-up welding the 3rd built-up welding section, weldering 1/2nd thickness; Last built-up welding the 4th built-up welding section, weldering 1/4th thickness;
Operation two, first built-up welding first built-up welding section, weldering 1/4th thickness; Built-up welding second built-up welding section again, weldering 1/3rd thickness; Then built-up welding the 3rd built-up welding section, weldering 1/4th thickness; Last built-up welding the 4th built-up welding section, weldering 1/2nd thickness;
Operation three, 1/3rd thickness of first built-up welding second built-up welding section remainder; / 4th thickness of built-up welding the 3rd built-up welding section remainder again; Then 1/4th thickness of built-up welding first built-up welding section remainder; / 4th thickness of last built-up welding the 4th built-up welding section remainder;
Operation four, covers two-layer overlay cladding at the outer surface of the first built-up welding section, the second built-up welding section, the 3rd built-up welding section and the 4th built-up welding section, makes the physical dimension that the roller shell overlay cladding of roller shell parent outer surface conforms with the regulations.
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| CN107283019A (en) * | 2017-05-12 | 2017-10-24 | 中信重工机械股份有限公司 | A kind of big end of vertical grinding roll cover with weld generation casting processing method |
| CN108406238B (en) * | 2018-04-09 | 2020-07-07 | 西南交通大学 | Double-phase laminated structure steel plate and preparation method thereof |
| CN108971899B (en) * | 2018-08-10 | 2020-08-14 | 广西柳钢工程技术有限公司 | Build-up welding method and deflection welding tool for vertical grinding roller |
| CN109604769B (en) * | 2019-01-07 | 2021-11-16 | 武汉船用机械有限责任公司 | Method for welding annular workpiece |
| CN109973742A (en) * | 2019-01-31 | 2019-07-05 | 武汉船用机械有限责任公司 | The production method of the rotary joint and rotary joint of anchoring system |
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Effective date of registration: 20161201 Address after: 200245 Jiangchuan Road, Shanghai, No. 230, building 1800, No. Patentee after: Shanghai electric heavy milling special equipment Co. Ltd. Patentee after: Shanghai Heavy Machines Plant Co., Ltd. Address before: 200245 Jiangchuan Road, Shanghai, No. 1800, No. Patentee before: Shanghai Heavy Machines Plant Co., Ltd. |