CN108044317B - Machining process of high-abrasion-resistance shield machine hob ring - Google Patents
Machining process of high-abrasion-resistance shield machine hob ring Download PDFInfo
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- CN108044317B CN108044317B CN201711370668.5A CN201711370668A CN108044317B CN 108044317 B CN108044317 B CN 108044317B CN 201711370668 A CN201711370668 A CN 201711370668A CN 108044317 B CN108044317 B CN 108044317B
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- 238000003754 machining Methods 0.000 title claims description 15
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 91
- 239000000956 alloy Substances 0.000 claims abstract description 91
- 230000007704 transition Effects 0.000 claims abstract description 78
- 238000003466 welding Methods 0.000 claims abstract description 21
- 229910001256 stainless steel alloy Inorganic materials 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000004321 preservation Methods 0.000 claims abstract description 5
- 238000009826 distribution Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 description 15
- 238000010276 construction Methods 0.000 description 10
- 238000005520 cutting process Methods 0.000 description 9
- 230000005641 tunneling Effects 0.000 description 9
- 239000011435 rock Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a processing technology of a high-abrasion-resistance shield machine hob ring, and belongs to the field of shield cutters. The invention is carried out according to the following steps: step one, arranging smoothly communicated fixed grooves on a longitudinal transition section, a transverse transition section and a front area of a hob ring in sequence; step two, heating the hob ring, and then uniformly welding a layer of stainless steel alloy on the inner wall of each side of the fixed groove by adopting a stainless steel alloy welding rod; after the third step and the second step are finished, welding hard alloy in the fixed groove by using a hard alloy welding rod; and after the welding is finished, carrying out heat preservation treatment on the hob ring. According to the invention, the hard alloy is reasonably arranged on the outer side of the shield cutter ring, so that the wear resistance of the cutter ring is effectively enhanced, the service life of the cutter ring is prolonged, the production cost is reduced, and the production loss is reduced.
Description
Technical Field
The invention relates to the technical field of shield cutters, in particular to a machining process of a hob ring of a shield machine with high wear resistance.
Background
The shield tunneling machine (shield tunneling machine for short) construction has the advantages of high mechanization degree, high construction speed and high safety, is widely applied to large-scale construction projects such as mines, railways, highways and the like, and the disc cutter is used as a main cutter for extruding, breaking rocks and tunneling and is a key part and an easily damaged part in the shield tunneling machine. The hob ring is always in contact with rocks in the whole tunneling process and is a working edge for tunneling and rock breaking, the hob ring not only bears the great thrust applied by the shield tunneling machine, but also is subjected to severe abrasion of various harder substances in the rocks, so that the hob ring is seriously abraded, the hob ring needs to be frequently replaced, the consumption is very high, the rock breaking efficiency of the shield tunneling machine is reduced, and meanwhile, the construction cost is increased. The problem that the wear resistance of the shield cutter ring is enhanced and the service life of the shield cutter ring is prolonged and needs to be broken through in the industry is solved.
Through retrieval, the Chinese patent application number: 2009100590614, filing date: 24 days 4 and 24 months in 2009, the invention and creation name is: the application discloses a cutter head of an earth pressure balance shield machine, which comprises a central area, a front area and an edge area; the top surface of each tool bit gradually bulges from the two side surfaces to the middle part to form a structure with a high middle part and two low sides; the upper parts of the two side surfaces of the cutter head are provided with an outward-expanding inclined surface; the middle part of the top surface is fixedly connected with strip-shaped hard alloy, and the top surfaces at two sides of the strip-shaped hard alloy are fixedly connected with four rows of symmetrically distributed hard alloy column teeth; the top of the hard alloy column tooth and the top of the strip-shaped hard alloy form a height difference in sequence; the top surface and the two side surfaces around the strip-shaped hard alloy and the hard alloy column tooth are fixedly connected with a wear-resistant surfacing layer. The application can improve the tunneling speed, reduce the abrasion of the cutter and prolong the service life of the cutter, but the application has the advantages of complex structure, high production and processing difficulty and higher production cost.
Also as in chinese patent application No.: 201620936968X, filing date: in 2016, 8 months and 25 days, the invention and creation names are: the application discloses a hob ring of a shield machine, wherein an annular groove is formed in the outer circumference of a hob ring body, a through hole is formed in one side wall of the annular groove, and a corresponding blind hole is formed in the other side wall of the annular groove; a hard alloy block is embedded in the annular groove, and a mounting hole corresponding to the through hole is formed in the hard alloy block; a connecting bolt is arranged in the through hole and penetrates through the through hole and the mounting hole to be inserted into the blind hole; this application can realize the quick assembly disassembly of carbide piece theoretically, reduces the whole change of cutter ring, but the wearability that the cutter ring bore during in-service use is very big, is difficult to realize the effective fixed of carbide piece through the bolt cooperation, appears the carbide piece pine phenomenon of taking off easily in engineering practice, not only causes great wearing and tearing to the carbide piece easily, also influences the normal tunnelling of cutter ring and uses, is difficult to in-service use.
Again, as with chinese patent application No.: 2010205107727, filing date: 26 days 8 and 2010, the invention and creation name is as follows: the application discloses a shield machine hobbing cutter ring which mainly comprises a ring body, wherein a hard alloy rolling ring is brazed on the periphery of the ring body, and the rolling ring consists of a plurality of arc-shaped strips and is brazed in an annular inner groove of the ring body; two transverse sides of each arc-shaped strip are respectively provided with a raised longitudinal rib; this application is convenient for braze, and the brazing is firm, but this application can only strengthen the most outside intensity of cutter ring, and the phenomenon that the hobbing cutter circle appears wearing and tearing inequality, broken rock effect inconsistent easily during the use influences the stable use of cutter.
In summary, in the prior art, a manner of adding a hard alloy outside a cutter ring is widely adopted to enhance the wear resistance of the cutter ring and prolong the service life of the hob ring, but the specific setting manner of the hard alloy is different, the final use performance of the hard alloy is good and bad, how to reasonably set the hard alloy on the basis of controlling the cost, and effectively improving the wear resistance of the shield cutter ring by using the high strength of the hard alloy is a pursuit of no longer will in the industry.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to overcome the defects of serious abrasion and frequent replacement of a shield cutter ring in the prior art, and provides a processing technology of a high-abrasion-resistance shield machine hob ring.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention relates to a processing technology of a high-wear-resistance shield machine hob ring, which is carried out according to the following steps:
step one, arranging smoothly communicated fixed grooves on a longitudinal transition section, a transverse transition section and a front area of a hob ring in sequence;
step two, heating the hob ring, and then uniformly welding a layer of stainless steel alloy on the inner wall of each side of the fixed groove by adopting a stainless steel alloy welding rod;
after the third step and the second step are finished, welding hard alloy in the fixed groove by using a hard alloy welding rod; and after the welding is finished, carrying out heat preservation treatment on the hob ring.
Furthermore, the hobbing cutter circle includes the cutter ring body, set up the installation cavity in the cutter ring body, cutter ring body outside middle part encircles along circumference and is provided with the outside outstanding front region, the upper and lower bilateral symmetry of this front region is provided with the horizontal changeover portion of hoop distribution, this horizontal changeover portion passes through the longitudinal transition section of hoop distribution and links to each other with the cutter ring body, at the longitudinal transition section, fixed recess has been seted up at even interval respectively on the hoop lateral wall in horizontal changeover portion and front region, and the longitudinal transition section, fixed recess on horizontal changeover portion and the front region is the one-to-one respectively and links to each other, be provided with carbide in the fixed recess.
Furthermore, the fixing grooves are arc-shaped grooves, and the longitudinal transition section, the transverse transition section and the fixing grooves on the front area are communicated in sequence in a smooth transition mode to form spiral distribution.
Furthermore, the thickness of the hard alloy in the fixing groove is 3-4 mm.
Furthermore, the cemented carbide surface is 0-1mm above the surfaces of the longitudinal transition, the transverse transition and the frontal area.
Further, the cemented carbide surface is flush with the surfaces of the longitudinal transition, the transverse transition and the frontal area, respectively.
Furthermore, the head end and the tail end of the mounting cavity are provided with inclined inner walls with outwards gradually-narrowed openings along the circumferential direction.
Further, the angle α between the tangents to the lateral transitions on either side of the frontal area is 22-26 °.
Furthermore, a stainless steel alloy layer is arranged between the hard alloy and the inner wall of the fixed groove.
Furthermore, a stainless alloy layer is welded on the inner wall of the fixed groove, and hard alloy is welded on the stainless alloy layer.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
(1) according to the processing technology of the high-abrasion-resistance shield machine hob ring, arc-shaped fixing grooves are uniformly arranged on the circumferential side walls of the longitudinal transition section, the transverse transition section and the front area at intervals, hard alloys are arranged in the fixing grooves, and the uniform interval arrangement of the hard alloys can effectively enhance the overall cutting strength of the longitudinal transition section, the transverse transition section and the front area, reduce the abrasion of cutting edges, improve the abrasion resistance and prolong the service life of the hob ring, avoid frequent replacement of the hob ring and reduce the production cost.
(2) According to the processing technology of the shield machine hob ring with high wear resistance, the longitudinal transition section, the transverse transition section and the fixing grooves on the front area are respectively connected in a one-to-one correspondence mode and are sequentially communicated in a smooth transition mode to form spiral distribution, the arc extending direction of the hard alloy is opposite to the rotating direction of the hob ring, so that during excavation construction, the arc convex side of the hard alloy is firstly contacted with a construction surface and then is fed gradually along the arc-shaped direction of the hard alloy, the arc smooth transition of the hard alloy has a certain guiding effect, the abrasion of the hard alloy is reduced, and the overall wear resistance of the hob ring is enhanced.
(3) According to the processing technology of the hob ring of the shield machine with high wear resistance, the abrasion stress points of the hard alloy are dispersed in sequence due to the arc distribution of the hard alloy, the whole surface abrasion of the hard alloy is avoided, the whole service life of the hard alloy is prolonged, and the high wear resistance of the hob ring is further guaranteed.
(4) According to the machining process of the hobbing cutter ring of the shield machine with high wear resistance, the hard alloy is embedded into the fixed groove in a welding mode, the stainless steel alloy is welded in the fixed groove to serve as the transition layer, the firmness of the hard alloy is guaranteed by utilizing the good contact property of the hard alloy and the stainless steel alloy, cracks, fine lines and the like between the hard alloy and the fixed groove are prevented, the position stability of the hard alloy is effectively improved, and the stable use of the hobbing cutter ring is guaranteed.
(5) According to the processing technology of the shield machine hob ring with high wear resistance, the included angle alpha between the tangent lines of the transverse transition sections at the two sides of the front area is 22-26 degrees, the sharpness degree of the cutting edge of the front area can be guaranteed, the working performance is improved, the cutting thickness of the front area is kept, the rapid wear of the front area is avoided, and the service life of the hob ring is prolonged.
Drawings
FIG. 1 is a schematic structural view of a high-wear-resistance shield machine hob ring processing technology in a front view;
FIG. 2 is a schematic structural diagram of a top view of the machining process of the hob ring of the high-wear-resistance shield machine of the present invention;
fig. 3 is a left-side view structural schematic diagram of the machining process of the high-wear-resistance shield machine hob ring.
The reference numerals in the schematic drawings illustrate: 1. a cutter ring body; 2. installing a cavity; 3. an inclined inner wall; 4. a longitudinal transition section; 5. a transverse transition section; 6. a front area; 7. and fixing the groove.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The present invention will be further described with reference to the following examples.
Example 1
As shown in fig. 1-3, the hob ring in this embodiment includes a hob ring body 1, a mounting cavity 2 is formed in the hob ring body 1, the hob ring is mounted on a central power shaft through the mounting cavity 2 in actual use for driving the hob ring to rotate and feed, inclined inner walls 3 with outward gradually-tapered openings are respectively formed at the head end and the tail end of the mounting cavity 2 along the circumferential direction, as shown in fig. 1, the arrangement of the inclined inner walls 3 facilitates the mounting and positioning cooperation of the hob ring and the central power shaft, further, the inner walls of the mounting cavity 2 are inclined inner walls, and form an included angle of 1 ° -2 ° (not marked in fig. 1) with the vertical direction, so as to form an inclination fit between the mounting cavity 2 and the central power shaft, improve the fit tightness and facilitate the smooth detachment therebetween.
In the embodiment, the middle part of the outer side of the cutter ring body 1 is circumferentially provided with an outwardly protruding front area 6, the upper side and the lower side of the front area 6 are symmetrically provided with circumferentially distributed transverse transition sections 5, as shown in fig. 1, the transverse transition sections 5 are connected with the cutter ring body 1 through circumferentially distributed longitudinal transition sections 4, the cutter ring body 1, the longitudinal transition sections 4, the transverse transition sections 5 and the front area 6 are all in arc smooth transition, and an included angle α between tangent lines of the transverse transition sections 5 at the two sides of the front area 6 is 22-26 °, specifically in the embodiment, α is 22 °; the blade part that positive region 6 was just for with digging face front contact during hobbing cutter circle in-service use, vertical changeover portion 4 then is the side direction blade part with horizontal changeover portion 5, the slope transition setting of horizontal changeover portion 5 of both sides and vertical changeover portion 4 in this embodiment, can ensure the blade sharpness of positive region 6, improve the working property, keep the cutting thickness of positive region 6 again, avoid the quick wearing and tearing of positive region 6, improve sword circle life, horizontal changeover portion 5 and vertical changeover portion 4's cooperation can also lead the dispersion to the cutting thing simultaneously, accelerate its crushed aggregates landing, prevent to block up.
In this embodiment, arc-shaped fixed grooves 7 are respectively formed in circumferential side walls of the longitudinal transition section 4, the transverse transition section 5 and the front area 6 at uniform intervals, as shown in fig. 2, the longitudinal transition section 4, the transverse transition section 5 and the fixed grooves 7 in the front area 6 are respectively connected in a one-to-one correspondence manner, and are sequentially communicated in a smooth transition manner to form spiral distribution, as shown in fig. 3, a hard alloy with a thickness of 3mm is arranged in the fixed grooves 7, the surface of the hard alloy is flush with the surfaces of the longitudinal transition section 4, the transverse transition section 5 and the front area 6, the uniform intervals of the hard alloy can effectively enhance the overall cutting strength of the longitudinal transition section 4, the transverse transition section 5 and the front area 6, reduce the abrasion of cutting edges, improve the abrasion resistance and the service life of the hob ring, avoid frequent replacement of the hob ring, and reduce the production cost.
It should be noted that the hard alloy is also spirally distributed by the arc-shaped alloy blocks, an included angle β between a tangent line of the arc-shaped hard alloy at the top of the front area 6 and a vertical plane is not less than 10 °, preferably 10 ° to 20 °, as shown in fig. 3, and an arc extending direction of the hard alloy is opposite to a working rotating direction of the hob ring, specifically, as shown in fig. 2, the hob ring performs rotating cutting along a clockwise direction (shown by a large arrow), arc rotating directions of the plurality of fixing grooves 7 are correspondingly set to be counterclockwise directions (shown by small arrows), when the hob ring rotates, an arc design of the hard alloy can effectively increase a contact area with an excavation construction surface, and improve wear resistance of the hob ring, and the direction and angle design of the hard alloy enable an arc convex side of the hard alloy to firstly contact with the construction surface during excavation construction, and then gradually feed along an arc line direction of the hard alloy, the arc-shaped smooth transition of the hard alloy has a certain guiding effect, so that the abrasion of the hard alloy is reduced, and the integral abrasion resistance of the hob ring is enhanced; secondly, during actual construction, the abrasion stress points of the hard alloy are dispersed successively due to the arc distribution of the hard alloy, the whole surface abrasion of the hard alloy is avoided, the whole service life of the hard alloy is prolonged, and the high abrasion resistance of the hob ring is further ensured.
The hob ring in the embodiment can effectively enhance the wear resistance and improve the use performance of the hob ring by using the hard alloy, but how to add the hard alloy and ensure the tight fit between the hard alloy and the hob ring is a difficult problem in the industry, the hard alloy is very easy to damage and break due to the brittle material of the hard alloy during machining, the contact between the hard alloy and the hob ring is poor, and the firm setting of the hard alloy is difficult to ensure, so that the problems of low fit quality, easy occurrence of cracks and the like of the hard alloy and the hob ring generally exist in the prior art although the hard alloy is also arranged on the hob ring, and the problem of restriction on the long-term and high-efficiency use of the hob ring is solved. In the hob ring of the embodiment, the stainless steel alloy layer is arranged between the hard alloy and the inner wall of the fixed groove 7, the stainless steel alloy layer is uniformly welded on the inner wall of the fixed groove 7, the thickness of the stainless steel alloy layer is 0.5-1mm, and the hard alloy is welded on the stainless steel alloy layer.
The machining process of the high-wear-resistance shield machine hob ring in the embodiment is carried out according to the following steps:
step one, arc-shaped fixed grooves 7 which are smoothly communicated are sequentially formed in a longitudinal transition section 4, a transverse transition section 5 and a front area 6 of a hob ring; the fixed grooves 7 are sequentially communicated in a smooth transition manner to form spiral distribution, and the arc-shaped extension direction of the fixed grooves 7 is opposite to the working rotation direction of the hob ring;
step two, heating the hob ring, wherein technicians such as specific heating modes, process parameters and the like can perform conventional setting according to production experience and in-plant equipment, and detailed description is omitted; then, uniformly welding a layer of stainless steel alloy on the inner wall of each side of the fixed groove 7 by adopting a stainless steel alloy welding rod; the thickness of the stainless steel alloy layer is 0.5-1 mm;
after the third step and the second step are finished, a hard alloy welding rod is adopted to continuously weld hard alloy in the fixed groove 7, and the thickness of the hard alloy layer is 3-4 mm; the hard alloys on the longitudinal transition section 4, the transverse transition section 5 and the front surface area 6 are sequentially connected in a smooth transition mode to form spiral distribution, heat preservation treatment is carried out on the hob ring after welding is finished, cracks caused by quenching of the hob ring are avoided, technical personnel such as specific heat preservation modes, process parameters and the like can carry out conventional setting according to production experience and in-plant equipment, and detailed description is omitted.
In this embodiment, adopt the welding mode with carbide embedding fixed recess 7 in, and weld the stainless steel alloy-layer at first in fixed recess 7 as the transition layer of bottoming, utilize carbide and stainless steel alloy's good face contact nature to ensure carbide's fastness, prevent to produce crack microgroove etc. between carbide and the fixed recess 7, effectively improved carbide's positional stability and fixity, ensure the stable use of hobbing cutter circle, through verifying, the hobbing cutter circle of having established the stainless steel alloy-layer has additionally been established, even its carbide also rarely appears crackle, phenomenons such as not hard up through long-term use, hobbing cutter circle's wearability and life all have obvious improvement.
Example 2
The processing technology of the shield machine hob ring with high wear resistance of the embodiment is basically the same as that of embodiment 1, except that the thickness of the hard alloy in the embodiment is 4mm, and the surface of the hard alloy is 1mm higher than the surfaces of the longitudinal transition section 4, the transverse transition section 5 and the front surface area 6 respectively; in this embodiment, the angle α between the tangents to the transverse transitions 5 on either side of the frontal area 6 is 24 °, and the angle β between the tangent to the top of the curved cemented carbide on the frontal area 6 and the vertical plane is 15 °.
Example 3
The processing technology of the shield machine hob ring with high wear resistance of the embodiment is basically the same as that of embodiment 1, except that the thickness of the hard alloy in the embodiment is 3.5mm, and the surface of the hard alloy is respectively 0.5mm higher than the surfaces of the longitudinal transition section 4, the transverse transition section 5 and the front surface area 6; in the present embodiment, the angle α between the tangents to the transverse transitions 5 on either side of the frontal area 6 is 26 °, and the angle β between the tangent to the top of the curved cemented carbide on the frontal area 6 and the vertical plane is 20 °.
Example 4
The processing technology of the shield machine hob ring with high wear resistance of the embodiment is basically the same as that of embodiment 1, except that the thickness of the hard alloy in the embodiment is 4mm, and the surface of the hard alloy is flush with the surfaces of the longitudinal transition section 4, the transverse transition section 5 and the front surface area 6 respectively; in this embodiment, the angle α between the tangents to the transverse transitions 5 on either side of the frontal area 6 is 25 °, and the angle β between the tangent to the top of the curved cemented carbide on the frontal area 6 and the vertical plane is 18 °.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (7)
1. The machining process of the hob ring of the shield machine with high wear resistance is characterized by comprising the following steps of:
step one, arranging fixing grooves (7) which are smoothly communicated on a longitudinal transition section (4), a transverse transition section (5) and a front surface area (6) of a hob ring in sequence;
step two, heating the hob ring, and then uniformly welding a layer of stainless steel alloy on the inner wall of each side of the fixed groove (7) by adopting a stainless steel alloy welding rod;
after the third step and the second step are finished, welding hard alloy in the fixing groove (7) by using a hard alloy welding rod; after the welding is finished, carrying out heat preservation treatment on the hob ring;
the hobbing cutter ring comprises a cutter ring body (1), an installation cavity (2) is formed in the cutter ring body (1), a front area (6) protruding outwards is arranged in the middle of the outer side of the cutter ring body (1) in a surrounding mode along the circumferential direction, transverse transition sections (5) distributed in the circumferential direction are symmetrically arranged on the upper side and the lower side of the front area (6), the transverse transition sections (5) are connected with the cutter ring body (1) through longitudinal transition sections (4) distributed in the circumferential direction, fixing grooves (7) are respectively formed in circumferential side walls of the longitudinal transition sections (4), the transverse transition sections (5) and the front area (6) at equal intervals, the fixing grooves (7) in the longitudinal transition sections (4), the transverse transition sections (5) and the front area (6) are respectively connected in a one-to-one correspondence mode, and hard alloys are arranged in the fixing grooves (7); the included angle alpha between the tangents of the transverse transition sections (5) on the two sides of the front area (6) is 22-26 degrees;
the fixed groove (7) is an arc-shaped groove, and the longitudinal transition section (4), the transverse transition section (5) and the fixed groove (7) on the front area (6) are sequentially communicated in a smooth transition manner to form spiral distribution; the hard alloy is correspondingly and spirally distributed by the arc-shaped alloy blocks, an included angle beta between a tangent line of the top of the arc-shaped hard alloy on the front surface area (6) and a vertical plane is 10-20 degrees, and the arc-shaped extension direction of the hard alloy is opposite to the working rotation direction of the hob ring.
2. The machining process of the hob ring of the shield machine with high wear resistance according to claim 1, is characterized in that: the thickness of the hard alloy is 3-4 mm.
3. The machining process of the hob ring of the shield machine with high wear resistance according to claim 1, is characterized in that: the surface of the hard alloy is 0-1mm higher than the surfaces of the longitudinal transition section (4), the transverse transition section (5) and the front surface area (6).
4. The machining process of the hob ring of the shield machine with high wear resistance according to claim 1, is characterized in that: the surface of the hard alloy is flush with the surfaces of the longitudinal transition section (4), the transverse transition section (5) and the front surface area (6) respectively.
5. The machining process of the hob ring of the shield machine with high wear resistance according to claim 1, is characterized in that: the head end and the tail end of the mounting cavity (2) are provided with inclined inner walls (3) with openings gradually drawing outwards along the circumferential direction.
6. The machining process of the hob ring of the shield machine with high wear resistance according to claim 1, is characterized in that: a stainless steel alloy layer is arranged between the hard alloy and the inner wall of the fixed groove (7).
7. The machining process of the hob ring of the shield machine with high wear resistance according to claim 1, is characterized in that: the stainless steel alloy layer is welded on the inner wall of the fixed groove (7), and the hard alloy is welded on the stainless steel alloy layer.
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| CN201711370668.5A CN108044317B (en) | 2017-12-19 | 2017-12-19 | Machining process of high-abrasion-resistance shield machine hob ring |
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| CN201711370668.5A CN108044317B (en) | 2017-12-19 | 2017-12-19 | Machining process of high-abrasion-resistance shield machine hob ring |
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| CN108044317B true CN108044317B (en) | 2020-01-17 |
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| CN109807555A (en) * | 2019-01-15 | 2019-05-28 | 常德市中天精密工具有限公司 | A kind of interference cold pressing treatment method of break bar cutter ring |
| CN109576450A (en) * | 2019-01-15 | 2019-04-05 | 常德市中天精密工具有限公司 | A kind of hot melt of break bar cutter ring is inserted and processing method |
| CN113338968B (en) * | 2021-06-22 | 2023-09-26 | 马鞍山灵山机械设备科技有限公司 | Heavy knife ring and production process thereof |
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| CN202079696U (en) * | 2011-04-30 | 2011-12-21 | 张兴和 | Roller of refiner |
| CN102517502A (en) * | 2012-01-16 | 2012-06-27 | 株洲钻石钻掘工具有限公司 | Disk-shaped roller cutter ring and manufacture method thereof |
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| CN105398124A (en) * | 2015-12-10 | 2016-03-16 | 河南广度超硬材料有限公司 | An intermediate medium for firmly connecting a cemented carbide cutter blade and a cutter body and a using method thereof |
| CN205805562U (en) * | 2016-07-13 | 2016-12-14 | 德阳宏源机电工程有限责任公司 | With the cutter ring of hobboing cutter on a kind of shield machine |
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| JPH10299387A (en) * | 1997-02-28 | 1998-11-10 | Komatsu Ltd | Disk cutter |
| JP2003336485A (en) * | 2002-05-17 | 2003-11-28 | Maeda Corp | Shield machine |
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| CN202079696U (en) * | 2011-04-30 | 2011-12-21 | 张兴和 | Roller of refiner |
| CN102517502A (en) * | 2012-01-16 | 2012-06-27 | 株洲钻石钻掘工具有限公司 | Disk-shaped roller cutter ring and manufacture method thereof |
| CN103008993A (en) * | 2012-11-29 | 2013-04-03 | 洛阳九久技术开发有限公司 | Manufacturing method of shield machine scraper |
| CN204002810U (en) * | 2014-07-22 | 2014-12-10 | 武汉江钻工程钻具有限责任公司 | A kind of helical teeth cutter ring of disc cutter |
| CN105398124A (en) * | 2015-12-10 | 2016-03-16 | 河南广度超硬材料有限公司 | An intermediate medium for firmly connecting a cemented carbide cutter blade and a cutter body and a using method thereof |
| CN205805562U (en) * | 2016-07-13 | 2016-12-14 | 德阳宏源机电工程有限责任公司 | With the cutter ring of hobboing cutter on a kind of shield machine |
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| CN108044317A (en) | 2018-05-18 |
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Denomination of invention: Processing technology of high wear resistance shield machine rolling cutter ring Granted publication date: 20200117 Pledgee: Dangtu County sub branch of China Post Savings Bank Co.,Ltd. Pledgor: ANHUI LINGFENG METALLURGICAL MACHINERY Co.,Ltd. Registration number: Y2024980039742 |
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