CN106493514B - A kind of reproducing method of shield protection cutter - Google Patents
A kind of reproducing method of shield protection cutter Download PDFInfo
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- CN106493514B CN106493514B CN201610829437.5A CN201610829437A CN106493514B CN 106493514 B CN106493514 B CN 106493514B CN 201610829437 A CN201610829437 A CN 201610829437A CN 106493514 B CN106493514 B CN 106493514B
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000000956 alloy Substances 0.000 claims abstract description 32
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 32
- 238000003466 welding Methods 0.000 claims abstract description 26
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 238000005520 cutting process Methods 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 5
- 230000007547 defect Effects 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000006378 damage Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 208000027418 Wounds and injury Diseases 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 208000014674 injury Diseases 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 13
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract 2
- 239000002994 raw material Substances 0.000 abstract 1
- 239000002689 soil Substances 0.000 description 12
- 238000005299 abrasion Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 239000011435 rock Substances 0.000 description 6
- 239000004576 sand Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 2
- 101100136092 Drosophila melanogaster peng gene Proteins 0.000 description 2
- 102000002322 Egg Proteins Human genes 0.000 description 2
- 108010000912 Egg Proteins Proteins 0.000 description 2
- 210000004681 ovum Anatomy 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- -1 sandy gravel Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A kind of reproducing method of shield protection cutter; according to cutter actual wear situation; waste shell knife and field resources is made full use of to carry out remanufacturing for protection cutter; save steel, the alloy of cutter manufacture; extend the service life of shield cutter circumferential cutter; it smoothly tunnels and provides safeguard for shield, belong to technical field of civil engineering.Its process step of the invention is as follows：(1) cutting tools measurement, data record, for protect cutter remanufacture raw material determine (2) remanufacture protection cutter height determine (3) remanufacture protection cutter making (4) reproduce protection cutter welding (5) detect check and accept.Waste shell knife is remanufactured into cutterhead periphery at the scene and protects cutter, while saving economic cost and progress cost, has effectively evaded the periphery in particular formation and has protected a series of construction risks that tool wear is seriously brought.
Description
Technical field
The present invention relates to one kind during subway shield tunnel construction according to cutter actual wear situation, makes full use of discarded knife
Tool and field resources carry out remanufacturing for protection cutter, save the steel and alloy of cutter manufacture, extend shield cutter periphery
Cutting-tool's used life effectively evades the side that a series of security risks caused by tool changing that must open a position are seriously worn because of cutter
Method belongs to technical field of civil engineering.
Background technology
For shield cutter size as shown in Figure 1, it is 6250mm that cutterhead loop diameter, which is A, cutterhead configures 1 or 2 maximum excavation
Diameter tool, cutterhead design maximum digging diameter B are bigger 30mm than cutterhead loop diameter A.
By taking ZTE6250 type shield machines as an example：Machine maximum digging diameter 6280mm, cutterhead are plate spoke structure, and first wife sets
8, hobboing cutter centered on cutter, 23, front hobboing cutter, 8, edge hobboing cutter, wherein eccentric 4, hobboing cutter, cutter 64, shell knife 14
, each 16 of edge blade 32, wherein left and right, 8, gauge knife, the main reply of this configuration containing weathered mudstone compoundly
Layer.The function of all kinds of cutters and effect are as follows：
Cutter：Cutter is weak soil cutter, is arranged in the both sides of cutterhead open slot, and cutting principle is that shield machine is pushed ahead
While, cutter rotates the axial thrust to the generation of the excavation face soil body along tunnel direction of advance with cutterhead, and along cutterhead rotary cutting
The radial cutting force in line direction, under the rotation of cutterhead, tool bit part is inserted into inside stratum, constantly by the soil body in front of excavation face
Cutting is got off.Cutter applies in general to the loose medias such as sand, sandy gravel, clay stratum.
Serrated knife：Serrated knife is the cutter of the leading cutting soil body, and serrated knife can be divided into two parts, i.e. serrated knife tool apron and welding again
Shell knife on tool apron.Mainly consider that the combination with other cutters cooperates in serrated knife design, serrated knife is more advanced than cutter
Arrangement carries out soil cutting prior to cutter, and by soil body cutting whole into sections, good machining condition is created for cutter.General serrated knife is wide
Degree is 60mm, and cutter width is 160mm, and serrated knife is higher compared to the stock-removing efficiency of cutter.Cutting can be dramatically increased using serrated knife
The mobility of the soil body substantially reduces the torque of cutterhead, improves the stock-removing efficiency of cutter, reduces the abrasion of cutter.In soft soil layer,
The using effect of especially sand-pebble layer serrated knife is fairly obvious, is more than 5MPa suitable for saturated uniaxial compressive strength, is less than
The soft rock strata cutter of 15MPa.
Hobboing cutter：When shield is tunneled in the harder stratum of soil property, hobboing cutter broken rock is preferably used.The principle of hobboing cutter broken rock is cutterhead
Hobboing cutter rotation while rotation rolls by cutter and generates extruding force, shearing force, achievees the purpose that crushing, pulverizes rock stratum.Hobboing cutter
Divide single-blade, twolip and three sword hobboing cutters, is installed on hobboing cutter centered on the hobboing cutter of cutter head center, positive cutterhead is front hobboing cutter, side
Edge is edge hobboing cutter.
Fish tail knife：It is installed on cutter head center, is highly 450mm, fish tail knife cuts soil in advance in shield driving at fish tail shape
Body overturns dregs, is conducive to reduce the incrusted risk of cutter head center, while can also play certralizing ability and soft rock cutter
One kind.
Edge blade and gauge knife：The main function of edge blade is the dregs that Cleaning cutter pan periphery is excavated, and ensures to excavate
Diameter；The main function of gauge knife is to reduce the outer peripheral direct abrasion of cutterhead circle.
The soil body is cut by cutterhead rotation in shield tunneling process, the angular speed of cutterhead different radii each point is identical at this time,
It is the radius of the point that according to the relationship V=R ω of linear velocity and angular speed, in formula, V, which is the linear velocity m/s, R of cutterhead point, and ω is
The angular speed rad/s of cutterhead.It being tunneled in layer of sand, cutterhead rotating speed is generally 0.8~1.2rpm, and cutterhead outer diameter is 6.28 meters, when
When cutterhead rotating speed is 1.0rpm, the linear velocity of cutter is respectively at 0.8 meter away from cutter head center, 1.5 meters, 3.14 meters：0.0834,
0.157,0.3287m/s；If it follows that when cutterhead rotating speed 1.0rpm, the linear velocity of cutter is knife at 3.14 meters of cutter radius
4 times of cutter linear velocity at 0.8 meter of disk radius；With the increase of radius, the linear velocity of cutter increases rapidly, i.e. periphery cutter
Running orbit is much larger than inner circumferential cutter, determines that the rate of wear of periphery cutter is much larger than inner circumferential cutter.
Shield the sand ovum gravel stratum of rich water, upper soft lower hard, high quartz content glutenite stratum in tunnel, tool wear
Situation is serious compared with other formation conditions, and when circumferential cutter abrasion reaches 12~15mm, shield will be unable to normally promote；If upper soft
Lower hard formation, shield attitude will be unable to control and difficulty promoted to cause section of jurisdiction rupture serious；If tunneling boring ground consisting of hard rock shield body
It will be stuck and lead to not promote.
During shield-tunneling construction, unit in charge of construction is general to wear more serious cutter using replacement after shield reception
Mode ensures being normally carried out for next stage shield-tunneling construction, and replaced cutter will be discarded directly, therefore shellfish often occurs
Shell knife, serrated knife, edge blade and gauge knife when reaching Rejection standard not up to or close to the case where being replaced, and cutter is more
It changes and will produce economy and progress cost, but if replacing not in time, then appear in next shield-tunneling construction in the process because of cutter
Serious wear and the operating mode for influencing construction, such as promote difficult, posture to be difficult to control, unit in charge of construction only uses and opens a position more at this time
The method of tool changing tool, this method can cause construction delay and larger economic loss, more seriously, caving ground into
Row it is with pressure open a position tool changing when there are great security risk and the environmental risks thus brought.So the present invention is aiming at this
Discarded cutter is remanufactured into periphery at the scene and protects cutter by actual conditions, while saving economic cost and progress cost,
The construction risk that the periphery protection tool wear in particular formation is serious and brings effectively is evaded.
It is serrated knife that the present invention chose, which remanufactures protection cutter object, and serrated knife is the Common Use Tools in sand-pebble layer.
Serrated knife the sand ovum gravel stratum of rich water, upper soft lower hard, high quartz content glutenite stratum in abrasion condition also than more serious,
But it is inferior to circumferential cutter, serrated knife alloy height is 50mm, and Rejection standard is that remaining alloy height is less than 25mm, and serrated knife price is
10284 yuan/, wherein shell knife are 7114 yuan/, and all edge doctor prices are 7196 yuan/, and individually discarded serrated knife can be fabricated to
1~2 protection cutter, can effectively reduce the abrasion of all edge doctors and gauge knife, engineering risk is reduced while cost-effective.
Invention content
The purpose of the present invention is being directed to on-site actual situations, a kind of method that shield protection cutter remanufactures is provided.
The process step of the invention is as follows：
(1) cutting tools measurement, data record
Shield miss the stop or transition during, cleaning cutterhead, the dregs between cutter, measure the actual size of cutter after cutterhead dismounting
And made a record by cutter number, hobboing cutter uses the template detection that production firm provides, and cutter, shell knife are used to be made by new knife
Detect its height difference from pallet and Steel Ruler, all edge doctors, gauge knife using Steel Ruler measure remaining alloy height and with it is new
Knife relatively obtains attrition value, arranges detection data, analyzes tool wear reason, and measurement periphery doctor back lowest point is excluded wear-resisting
After grid with the actual measurement spacing C (as shown in Figure 2) of cutterhead circle, and measure cutterhead circle actual diameter and with former design diameter size phase
Compare and obtains cutterhead circle actual wear amount D/2；
(2) protection cutter height is remanufactured to determine
In order to improve the service life of circumferential cutter, the practical digging diameter E of cutterhead that cutter is protected with periphery should ensure that
More than cutterhead design digging diameter B, i.e., practical digging diameter E ratios design digging diameter B increases by 10~20mm；When section of jurisdiction, width is
When 1.2m, not using theory unearthed 37.1m3/ rings when protection cutter, the earthwork 0.12 of backbreaking after using protection cutter~
0.24m3/ rings.
At this point, as shown in figure 3, the height for remanufacturing protection cutter is H, the calculation formula of H is
H- reconstruction protection cutter heights；
A- cutterhead circle initial diameters 6250mm；
B- cutterhead design digging diameters 6280mm；
Exclude the actual measurement spacing with cutterhead circle after wear-resisting grid in the peripheries C- doctor back lowest point；
Cutterhead practical digging diameter 6290~6300mm, E=B+10~20mm of the E- with periphery protection cutter；
Remanufacture the height H of protection cutter equal to periphery doctor back lowest point exclude after wear-resisting grid with cutterhead circle
Survey the half of spacing C, cutterhead design digging diameter and cutterhead circle initial diameter differenceCutter is protected with periphery
The half of cutterhead circle actual diameter and original diameter differenceThe practical digging diameter of cutterhead of cutter is protected to be set with cutterhead with periphery
Count the half of digging diameter differenceThe sum of four.
(3) protection cutter making is remanufactured
a:It selects alloy height to be less than 25mm, is more than the serrated knife of 20mm, shell knife is excluded above tool apron, is excluded
When ensure the dimensional accuracy of former tool apron.
b:Serrated knife original designs as shown in figure 4, the shell knife cutter head of its middle and upper part is by 5 pieces of composition of alloy, during remanufacturing
According to the actual geometry of plane lower valve knife, using gouge mode along the horizontal plane x position shown in Fig. 5 dig it is disconnected, make horizontal plane with
The distance from top of shell knife is equal with protection cutter height H is remanufactured, then vertically the plane of y location shown in Fig. 5 is broken into two pieces,
One block length is 170mm, and another block length is 120mm, should be disconnected by cutter hub base material plane when plane is disconnected, cannot hurt alloy, with
Ensure that the former weld strength of cutter hub alloy, the signal of slicing schematic three-dimensional are as shown in Figure 6.
(4) welding of reconstruction protection cutter
a：As shown in Figures 9 and 10, the back for being welded on all edge doctors for remanufacturing protection cutter will be protected with gouge mode
The welding position of knife makes 10 × 45 ° of grooves of V-arrangement, retains the wearing layer of former cutter hub；
b：When protecting knife welding, using carbon-dioxide arc welding, gage of wire 1.2mm, current control in 180~220A,
Weld seam is V-arrangement, height 10mm；
c：Cutter head alloy is protected in welding process；
d：Weld seam finds the defect for having stomata, slag inclusion, is excluded with carbon arc air gouging after flaw detection.
e：After the weld seam planing defect reprocessed, welded again after removing removing oxide layer.
(5) detection is checked and accepted
It is detected after Welding of cutters, if weld seam does not hurt protection knife alloy without slag inclusion, crackle and weld seam, is considered as weldering
Lattice are engaged, are delivered for use after fulfiling corresponding record formality；If it was found that weld seam has slag inclusion, crackle that should exclude slag inclusion or cracks,
Again it welds, is detected again after welding, is delivered for use after acceptance(check).
When weld seam is excessively high leads to cutter head alloy injury, the protection knife is excluded, more renew protection knife and is welded again, is repeated
The above-mentioned detection course of receiving.
Beneficial effects of the present invention：
(1) present invention is the abrasion condition of the geologic structure and cutter according to different sections, and side is carried out using discarded cutter
Remanufacturing for edge protection cutter, extends the service life of circumferential cutter, ensure that the smooth driving of shield, improves driving effect
Rate reduces construction cost.
For example, Nanchang rail traffic No.1 line civil engineering 6 is marked in work progress, profit is repeated when serrated knife is replaced using this method
With serrated knife tool apron 50, the shell knife excluded, which is made, which becomes periphery scraper, protects cutter, reduces and replaces all edge doctors 52.
Cutter parts price is：7114 yuan of shell knife, 10284 yuan of serrated knife, all 7196 yuan of edge doctors.
The project saves the cost of charp tool：
Serrated knife：(10284 yuan -7114 yuan) × 50=18500 members
All edge doctors：7196 yuan × 52=374192 members
It amounts to：18500 yuan+374192 yuan=392692 yuan.
Totally 9 civil construction bid sections, the present invention are expected that cutter can be saved when all fronts are promoted Nanchang Subway Line 1 project
3534228 yuan of cost is completely promoted in two, three, No. four lines and is expected that 10602684 yuan of fund can be saved there is good popularization to answer
With value.
(2) effect of the present invention is high, at low cost, makes full use of discarded cutter and field resources to carry out cutter and remanufactures, saves
The steel and alloy of cutter manufacture, effectively extend existing cutting-tool's used life.Therefore the present invention has larger innovation and practice
Meaning.
(3) present invention can effectively evade is seriously worn a series of risks caused by tool changing that must open a position because of cutter, fits
It for the soil pressure of different size model or the protection of slurry balance shield cutter and remanufactures, can operate at the scene, it is special to be not required to
Equipment, therefore have larger promotional value and industrialization prospect.Such as in cutter changing, the protection knife of all edge doctors is increased
Tool, be effectively ensured cutterhead digging diameter be not less than notch ring diameter 6250mm, successfully evaded shield rich water gravel
Stratum driving in because circumferential cutter serious wear must the tool changing with pressure that open a position risk and economic loss, usually the tool changing with pressure that opens a position
It is about 15 days primary, disregard idle time cost, labour cost is once not less than 300,000 yuan；The primary tool changing total cost with pressure that opens a position is not low
In 1,000,000 yuan.
Description of the drawings
Fig. 1 is shield cutter scale diagrams；
In figure：A- cutterhead circle initial diameters 6250mm；B- cutterhead design digging diameters 6280mm；
Fig. 2 is cutterhead measured distance schematic diagram；
The actual measurement spacing with cutterhead circle after wear-resisting grid is excluded in the peripheries C- doctor back lowest point in figure；
Fig. 3 is to remanufacture protection cutter height to calculate schematic diagram；
In figure：H- reconstruction protection cutter heights；A- cutterhead circle initial diameters 6250mm；B- cutterhead design digging diameters
6280mm；Exclude the actual measurement spacing with cutterhead circle after wear-resisting grid in the peripheries C- doctor back lowest point；E- protects knife with periphery
The cutterhead practical 6290~6300mm of digging diameter, E=B+10~20mm of tool；
Fig. 4-1 designs elevation for serrated knife；In figure：A- shell knife cutter head length；
Fig. 4-2 is 1-1 sectional views in Fig. 4-1；In figure：B- shell knife cutter head width；
Fig. 4-3 is 2-2 sectional views in Fig. 4-1；
In figure：A- shell knife cutter head length, b- shell knife cutter head width；
Fig. 5 is slicing schematic diagram,
In figure：H- reconstruction protection cutter heights；A- shell knife cutter head length 296mm；It is long that c- remanufactures protection cutter
Degree, generally 170mm；D- remanufactures protection cutter length, generally 120mm；X- horizontal lines；Y- vertical lines；
Fig. 6 is three-dimensional slicing schematic diagram；In figure：X- horizontal lines；Y- vertical lines；
Fig. 7 is to remanufacture protection 1 schematic diagram of cutter,
In figure：H- reconstruction protection cutter heights；C- remanufactures protection cutter length, generally 170mm；
Fig. 8 is to remanufacture protection 2 schematic diagram of cutter, and d- remanufactures protection cutter length, generally 120mm；
Fig. 9 is protection knife mounting vertical plane figure；
In figure：1- weeks edge doctor；2- remanufactures protection knife；In figure：A- weld seams；B- weld seams；C- weld seams；
Figure 10 is to protect knife installation schematic three dimensional views, in figure：1- weeks edge doctor；2- remanufactures protection knife；C- weld seams；
Figure 11 is No.1 rounding machine cutter configuration diagram in example；
In figure：The fronts 1- serrated knife；2- weeks edge doctor；3- bias serrated knives；The centers 4- serrated knife；
Figure 12 is No. two rounding machine cutter configuration diagrams in example；
In figure：The fronts 1- serrated knife；2- weeks edge doctor；3- bias serrated knives；The centers 4- serrated knife.
Specific implementation mode
Embodiment
This method is applied successfully in six target of Nanchang rail traffic Line 1 civil engineering, and the shield machine for this engineering is by China
Tie Jian heavy industrys Group Co., Ltd produces, model ZTE6250, digging diameter 6280mm, and cutterhead is plate spoke structure.
As shown in FIG. 11 and 12, the serrated knife that cutterhead uses includes front serrated knife, all edge doctors, eccentric serrated knife, center serrated knife；
The supply of material of cutter factory is all the whole supply of material.Tool apron abrasion is seldom in actual use, can repeatedly use.It is constructing thus
The shell knife of abrasion is excluded when cutter changing, welds new shell knife again in former tool apron.
(1) the tool wear situation in Peng family's bridge station~Normal University South Road station section
Shield cleans the dregs between cutterhead, cutter after completing Peng family's bridge station~661 meters of Normal University South Road station section driving, measures
Cutter actual size, serrated knife average abrasion amount are 20mm, and wherein need of the serrated knife residue alloy height less than 25mm carry out replacement 22
?；13 of serrated knife residue alloy height more than 25mm, which continue serrated knife to retain, to be used, and 22 under replacing are using serrated knife as remanufacturing
Protect the candidate materials of cutter.
Periphery blade wears situation is：During previous construction section, when protection cutter is not used, all edge doctors are average
Wear extent is 8mm, wherein 12 burst apart all edge doctors damage, is more than 8mm by wear extent and has damaged cutter and replace, 8
Abrasion is continuing with less than 8mm and the intact all edge doctors of alloy.
It is 50mm to measure the actual measurement spacing C that periphery doctor back lowest point is excluded after wear-resisting grid with cutterhead circle, due to knife
Wear-resistant composite board is welded on coil periphery, and cutterhead circle driving 661m is not worn, therefore D=0.
(2) protection cutter height is remanufactured to determine
Using protection cutter is remanufactured, practical digging diameter, the cutterhead design that shield cutter is constructed in next segment are opened
It is respectively 6290~6300mm, 6280mm to dig diameter, and practical digging diameter increases by 10~20mm than design digging diameter, ensures band
There is the practical digging diameter of cutterhead of periphery protection cutter to be more than cutterhead design digging diameter.
At this point, determining that the calculation formula of the height H, H that remanufacture protection cutter are
That is H=70~75mm,
(3) protection cutter making is remanufactured
Scrap serrated knife of the remaining alloy height of selection not less than 20mm makes protection cutter, increases by 8 altogether protection cutter.It will
Shell knife is excluded above tool apron, ensures the dimensional accuracy of former tool apron when excluding, the shell knife cutter head of middle and upper part is by 5 pieces
Composition of alloy, according to the actual geometry of plane lower valve knife during remanufacturing, using gouge mode, position is dug along the horizontal plane
It is disconnected, keep horizontal plane equal with protection cutter height H is remanufactured with the distance from top of shell knife, then vertically plane is broken into two
Block, a block length are 170mm, and another block length is 120mm, should be disconnected by cutter hub base material plane when plane is disconnected, cannot hurt alloy,
To ensure the former weld strength of cutter hub alloy, the height of cutter head is higher by about 5~8mm than all edge doctors in addition, the periphery being equivalent to
A diameter of 6270~the 6275mm of scraper；To improve the wearability of all edge doctors, cutter back, wear-resisting grid is welded at its back；
Useless shell knife of the repair welding one alloy height not less than 20mm further increases its service life on the inside of edge serrated knife.
(4) welding of reconstruction protection cutter
a：The back for being welded on all edge doctors of protection cutter will be remanufactured, the welding position of knife will be protected with gouge mode
10 × 45 ° of grooves of V-arrangement are made, the wearing layer of former cutter hub is retained；
b：When protecting knife welding, using carbon-dioxide arc welding, gage of wire 1.2mm, current control in 180~220A,
Weld seam is V-arrangement, height 10mm；
c：Cutter head alloy is protected in welding process；
(5) detection is checked and accepted
It is detected after Welding of cutters, weld seam does not hurt protection knife alloy without slag inclusion, crackle and weld seam, is considered as welding
It is qualified.
(6) protection cutter using effect is remanufactured
After the shield machine that addition remanufactures protection cutter is constructed by Normal University South Road station~fourth highway northern station and is smoothly received,
Abrading block is more intact after the protection tool wear of lower part, essentially identical with all edge doctors height of its protection of lower part, in protection knife
Under the protection of tool, the average abrasion amount of lower periphery scraper alloy is 3mm, and phenomenon is damaged without bursting apart.The shield in the section
Driving is smoothed out and the actual wear situation of circumferential cutter illustrates that remanufacturing protection cutter has received well using effect
Fruit.
Claims (1)
1. a kind of reproducing method of shield protection cutter, it is characterised in that：
(1) cutting tools measurement, data record
Shield miss the stop or transition during, cleaning cutterhead, the dregs between cutter, measure the actual size of cutter and press after cutterhead dismounting
Cutter number make a record, hobboing cutter use production firm provide template detection, cutter, shell knife use by new knife make from
Pallet and Steel Ruler detect its height difference, all edge doctors, gauge knife using Steel Ruler measure remaining alloy height and with new knife ratio
It relatively obtains attrition value, arranges detection data, analyze tool wear reason, measure periphery doctor back lowest point and exclude wear-resisting grid
Afterwards with the actual measurement spacing C of cutterhead circle, and measures cutterhead circle actual diameter and obtain cutterhead circle compared with former design diameter size
Actual wear amount D/2；
(2) protection cutter height is remanufactured to determine
To improve the service life of circumferential cutter, ensure that the practical digging diameter E of cutterhead with periphery protection cutter is more than cutterhead
Digging diameter B is designed, i.e., practical digging diameter E ratios design digging diameter B increases by 10~20mm；When section of jurisdiction width is 1.2m,
Not using theory unearthed 37.1m when protection cutter3/ ring, backbreak 0.12~0.24m of the earthwork after using protection cutter3/ ring；
The height for remanufacturing protection cutter is H, and the calculation formula of H is
H- remanufactures protection cutter height；
A- cutterhead circle initial diameters 6250mm；
B- cutterhead design digging diameters 6280mm；
Exclude the actual measurement spacing with cutterhead circle after wear-resisting grid in the peripheries C- doctor back lowest point；
Cutterhead practical digging diameter 6290~6300mm, E=B+10~20mm of the E- with periphery protection cutter；
The height H for remanufacturing protection cutter is equal to periphery doctor back lowest point and excludes actual measurement after wear-resisting grid with cutterhead circle
The half of spacing C, cutterhead design digging diameter and cutterhead circle initial diameter differenceThe cutterhead of cutter is protected with periphery
Enclose actual wear amountThe practical digging diameter of cutterhead and the one of cutterhead design digging diameter difference of cutter is protected with periphery
HalfThe sum of four；
(3) protection cutter making is remanufactured
a:It selects alloy height to be less than 25mm, is more than the serrated knife of 20mm, shell knife is excluded above tool apron, is protected when excluding
The dimensional accuracy of the former tool apron of card；
b:The shell knife cutter head of the middle and upper part of serrated knife is by 5 pieces of composition of alloy, according to the reality of plane lower valve knife during remanufacturing
Geometric dimension is dug using gouge mode and is broken along the horizontal plane, is made the distance from top of horizontal plane and shell knife and is remanufactured protection cutter
Height H is equal, then vertically plane is broken into two pieces, and a block length is 170mm, and another block length is 120mm, should be by when plane is disconnected
It digs and breaks at cutter hub base material, alloy cannot be hurt, to ensure the former weld strength of cutter hub alloy；
(4) welding of protection cutter is remanufactured
a：The back for being welded on all edge doctors for remanufacturing protection cutter will protect the welding position of knife to make V with gouge mode
10 × 45 ° of grooves of shape retain the wearing layer of former cutter hub；
b：When protecting knife welding, using carbon-dioxide arc welding, gage of wire 1.2mm, current control is in 180~220A, weld seam
For V-arrangement, height 10mm；
c：Cutter head alloy is protected in welding process；
d：Weld seam finds the defect for having stomata, slag inclusion, is excluded with carbon arc air gouging after flaw detection；
e：After the weld seam planing defect reprocessed, welded again after removing removing oxide layer；
(5) detection is checked and accepted
It is detected after Welding of cutters, if weld seam does not hurt protection knife alloy without slag inclusion, crackle and weld seam, is considered as welding and closes
Lattice are delivered for use after fulfiling corresponding record formality；If it was found that weld seam has slag inclusion, crackle that should exclude slag inclusion or cracks, again
Welding, detects after welding, is delivered for use after acceptance(check) again；
When weld seam is excessively high leads to cutter head alloy injury, the protection knife is excluded, more renew protection knife and is welded again, is repeated above-mentioned
Detect the course of receiving.
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| CN201610829437.5A CN106493514B (en) | 2016-09-19 | 2016-09-19 | A kind of reproducing method of shield protection cutter |
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| CN201610829437.5A CN106493514B (en) | 2016-09-19 | 2016-09-19 | A kind of reproducing method of shield protection cutter |
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| CN106493514B true CN106493514B (en) | 2018-11-09 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112926015B (en) * | 2021-03-11 | 2022-04-19 | 南昌航空大学 | Method for pre-estimating and calculating abrasion loss of cutter of shield tunneling machine |
| CN113005451A (en) * | 2021-03-19 | 2021-06-22 | 中铁工程装备集团有限公司 | Hob remanufacturing method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3705292B1 (en) * | 2004-09-29 | 2005-10-12 | 石川島播磨重工業株式会社 | Branch shield start method |
| CN202039855U (en) * | 2011-04-14 | 2011-11-16 | 中铁十一局集团城市轨道工程有限公司 | Wear-resistant cutterhead of shield machine |
| CN202039854U (en) * | 2011-04-14 | 2011-11-16 | 中铁十一局集团城市轨道工程有限公司 | Novel cutter disk of shield machine |
| CN102261253A (en) * | 2010-05-25 | 2011-11-30 | 中铁十八局集团有限公司 | Protection method of hard rock tunneller hob |
| CN102852527A (en) * | 2012-04-23 | 2013-01-02 | 中铁十六局集团有限公司 | Cutter disc and cutter improving method for accelerating shield excavation in dense sand layer |
| CN103321647A (en) * | 2013-01-22 | 2013-09-25 | 上海振华重工(集团)股份有限公司 | Shield cutter head and manufacturing method thereof |
| CN104060995A (en) * | 2014-07-02 | 2014-09-24 | 北京城建设计发展集团股份有限公司 | Shield cutterhead structure for uneven mutual-penetration composite rock stratum |
| CN104100276A (en) * | 2014-07-02 | 2014-10-15 | 北京城建设计发展集团股份有限公司 | Uneven soft or hard mutual intrusion composite rock stratum shield cutterhead type selection and cutting tool configuration technology |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3160695B2 (en) * | 1994-09-14 | 2001-04-25 | 東京電力株式会社 | Shield excavator |
| JP6192627B2 (en) * | 2014-10-15 | 2017-09-06 | 飛島建設株式会社 | Shield excavator cutter head |
-
2016
- 2016-09-19 CN CN201610829437.5A patent/CN106493514B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3705292B1 (en) * | 2004-09-29 | 2005-10-12 | 石川島播磨重工業株式会社 | Branch shield start method |
| CN102261253A (en) * | 2010-05-25 | 2011-11-30 | 中铁十八局集团有限公司 | Protection method of hard rock tunneller hob |
| CN202039855U (en) * | 2011-04-14 | 2011-11-16 | 中铁十一局集团城市轨道工程有限公司 | Wear-resistant cutterhead of shield machine |
| CN202039854U (en) * | 2011-04-14 | 2011-11-16 | 中铁十一局集团城市轨道工程有限公司 | Novel cutter disk of shield machine |
| CN102852527A (en) * | 2012-04-23 | 2013-01-02 | 中铁十六局集团有限公司 | Cutter disc and cutter improving method for accelerating shield excavation in dense sand layer |
| CN103321647A (en) * | 2013-01-22 | 2013-09-25 | 上海振华重工(集团)股份有限公司 | Shield cutter head and manufacturing method thereof |
| CN104060995A (en) * | 2014-07-02 | 2014-09-24 | 北京城建设计发展集团股份有限公司 | Shield cutterhead structure for uneven mutual-penetration composite rock stratum |
| CN104100276A (en) * | 2014-07-02 | 2014-10-15 | 北京城建设计发展集团股份有限公司 | Uneven soft or hard mutual intrusion composite rock stratum shield cutterhead type selection and cutting tool configuration technology |
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| CN106493514A (en) | 2017-03-15 |
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