CN106363369A - Shield machining method for large-diameter shield tunneling machine - Google Patents
Shield machining method for large-diameter shield tunneling machine Download PDFInfo
- Publication number
- CN106363369A CN106363369A CN201611043168.6A CN201611043168A CN106363369A CN 106363369 A CN106363369 A CN 106363369A CN 201611043168 A CN201611043168 A CN 201611043168A CN 106363369 A CN106363369 A CN 106363369A
- Authority
- CN
- China
- Prior art keywords
- shield
- connecting plate
- welded
- shield body
- machining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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 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
Abstract
The invention discloses a shield machining method for a large-diameter shield tunneling machine, and relates to the field of machining, in particular to the shield machining method for the large-diameter shield tunneling machine. The method comprises the following steps that after connecting plates are discharged and leveled, planes at the two ends are machined; the planeness of the two ends of each connecting plate is required to be 0.2 mm, the position degree of positioning pin holes is required to be 0.4 mm, the dimensional tolerance is 0.2 mm, to guarantee the requirements for the form and location tolerance and dimensional tolerance of the positioning pin holes and achieve accurate positioning after dismounting, the two adjacent connecting plates are subjected to spot welding together, connecting holes are formed through matched drilling, and the positioning pin holes are drilled and expanded; and after hole position machining, the two connecting plates are connected and locked through bolts, technology blocks are welded to the peripheries of the connecting plates, and sliding and deformation are prevented when the connecting plates and the shield are welded. The shield machining method is easy to operate, machining is convenient, the machining quality and machining precision of a workpiece can be guaranteed, the production cost is reduced, and the production efficiency is improved.
Description
Technical field
The present invention relates to field of machining is and in particular to large-diameter shield machine shield body processing method.
Background technology
Large-diameter shield machine has the features such as high in technological content, manufacturing process is complicated, added value of product is high, represents existing
High-tech level and the main development direction in field is equipped in tunneling boring tunnel piercing.External shield method tunnel construction technology is to depth
Buried regions, big cross section, distance direction are fast-developing, and have built up seabed tunnel and the urban transportation tunnel of a collection of major diameter.Cut
Only at present, the large-diameter shield machine quantity coming into operation both at home and abroad adds up to cover more than 20, and the Tunnel Engineering applied has Mo Si
Branch tunnel, Dutch green heart tunnel, upper sea Road tunnel, yangtze river in nanjing tunnel, Yangzhou Slender West Lake tunnel etc..Domestic each big dress
Standby manufacturing enterprise falls over each other to develop the shield machine product possessing independent intellectual property right, but in large-diameter shield independent research, manufacture
Upper experience is still scarce., all in more than 12m, because shield body is relatively large in diameter, entire length is longer, by existing for the diameter of large-diameter shield machine
Conventional process equipment energy power restriction is it is impossible to realize overall manufacture or processing.The processing and manufacturing of shield machine shield body is except considering to produce
Ability and technical merit, also need to meet in transportation to the length of shield body, width, short transverse dimensional requirement, Yi Jixian
Field is installed, lifting operational capacity requires.The processing method of large-sized structural parts typically adopts sectional type to splice.For large-diameter shield
The processing of machine shield body, technological difficulties are concentrated mainly on: the processing and manufacturing of major diameter structural member, and high accuracy is assembled and large scale structure
Part block design.The release of excision material residual stress, clamping condition, weld part is considered in the large-sized structural parts course of processing
Easily there is the factors such as welding deformation it is difficult to ensure overall size and precision more than position.
Content of the invention
In order to solve the above problems, the present invention provides a kind of simple to operate, convenient processing, ensure that workpiece processing quality
And machining accuracy, reduce production cost, the large-diameter shield machine shield body processing method of improve production efficiency.
Large-diameter shield machine shield body processing method of the present invention, comprises the following steps:
The first step, after connecting plate blanking leveling, machines end flat；
Second step, connecting plate end flat degree requires as 0.2mm, and dowel hole position degree requires as 0.4mm, and dimensional tolerance is
0.2mm, for ensureing form and position tolerance and the size tolerance requirements of dowel hole, can accurately to position after splitting, will be adjacent
Two pieces of connecting plates are spot-welded together, join and get out connecting hole, and bore each dowel hole of expansion；
Two pieces of connecting plates after machine adds hole position, then are connected and lock with bolt by the 3rd step, burn-on technique in the periphery of connecting plate
Block, prevents connecting plate from sliding when welding with shield body and deforming；
4th step, after the part on each piecemeal of shield body has welded and aligned, all shield body piecemeal groups is combined on same circle, and
The locational space that cutting is welded with connecting plate school, the size cut off should ensure that loading onto connecting plate post gap is less than 2mm；
5th step, after cutting out connecting plate installation site, the paired connecting plate fixed is installed in adjustment with bolt, checks school weldering
The gap of position, if differing from 2mm, carries out built-up welding to the position exceeding it is ensured that gap is little and uniform, when being welded to connect plate with minimizing
Deflection, ensure that when being welded to connect plate combination connecting plate both sides are welded simultaneously, and apply in the both sides of each pair connecting plate simultaneously
Weldering, to reduce the deformation producing because of different stress；
6th step, pulls down the bolt of connecting plate after shield body cools down completely again after integral solder, cut away on connecting plate periphery
All unwelded positions are welded after fractionation by technique block；
All shield body piecemeals are reconfigured and clamping screw after the completion of welding, the axial direction of large-diameter shield shield body by the 7th step again
Using sectional making, in addition to anterior shield with middle shield, shield tail is divided into two sections of splicings of before and after, passes through welding and realize mutual connection between segmentation
Connect, after section cylinder assembly in front and back, ensuring coaxiality is in the margin of tolerance allowing.
The present invention is simple to operate, convenient processing, ensure that workpiece processing quality and machining accuracy, reduces production cost,
Improve production efficiency.
Specific embodiment
Large-diameter shield machine shield body processing method of the present invention, comprises the following steps:
The first step, after connecting plate blanking leveling, machines end flat；
Second step, connecting plate end flat degree requires as 0.2mm, and dowel hole position degree requires as 0.4mm, and dimensional tolerance is
0.2mm, for ensureing form and position tolerance and the size tolerance requirements of dowel hole, can accurately to position after splitting, will be adjacent
Two pieces of connecting plates are spot-welded together, join and get out connecting hole, and bore each dowel hole of expansion；
Two pieces of connecting plates after machine adds hole position, then are connected and lock with bolt by the 3rd step, burn-on technique in the periphery of connecting plate
Block, prevents connecting plate from sliding when welding with shield body and deforming；
4th step, after the part on each piecemeal of shield body has welded and aligned, all shield body piecemeal groups is combined on same circle, and
The locational space that cutting is welded with connecting plate school, the size cut off should ensure that loading onto connecting plate post gap is less than 2mm；
5th step, after cutting out connecting plate installation site, the paired connecting plate fixed is installed in adjustment with bolt, checks school weldering
The gap of position, if differing from 2mm, carries out built-up welding to the position exceeding it is ensured that gap is little and uniform, when being welded to connect plate with minimizing
Deflection, ensure that when being welded to connect plate combination connecting plate both sides are welded simultaneously, and apply in the both sides of each pair connecting plate simultaneously
Weldering, to reduce the deformation producing because of different stress；
6th step, pulls down the bolt of connecting plate after shield body cools down completely again after integral solder, cut away on connecting plate periphery
All unwelded positions are welded after fractionation by technique block；
All shield body piecemeals are reconfigured and clamping screw after the completion of welding, the axial direction of large-diameter shield shield body by the 7th step again
Using sectional making, in addition to anterior shield with middle shield, shield tail is divided into two sections of splicings of before and after, passes through welding and realize mutual connection between segmentation
Connect, after section cylinder assembly in front and back, ensuring coaxiality is in the margin of tolerance allowing.
Axiality after the assembly of axial segmentation shield body is by assuring that the hanging down of the respective ovality of two cylinders and end face and cylinder
Straight degree is realized, and before a splice during back segment cylinder, the end clearance of docking is that the thick plate of 2-3mm makees gap limit, and the two of splicing
Section body end surface girth needs accurate measurement, calculates mutually impartial departure, guarantees the end face pair of two cylinders during spot welding positioning
Connect magnitude of misalignment and compensate its departure it is ensured that the ovality of shield body.The docking group postwelding completing two sections of cylinders will be straight for cylinder outermost
Plain line n decile, measures the linearity departure of each Along ent, if departure is symmetry equivalent using laser linearity measuring instrument
Be then qualified, qualified after can weld the splicing circumferential weld of cylinder.Girth weld is appropriate to the occasion to be placed on horizontal for cylinder on turntable, is turning
Submerged arc welding is adopted during dynamic cylinder.Often it is soldered together in welding process, must be inclined with laser linearity measuring instrument detection of straight lines degree
Residual quantity, prevents the deformation of welding process from leading to linearity to deviate allowed band.
The present invention is simple to operate, convenient processing, ensure that workpiece processing quality and machining accuracy, reduces production cost,
Improve production efficiency.
Claims (1)
1. a kind of large-diameter shield machine shield body processing method is it is characterised in that comprise the following steps:
The first step, after connecting plate blanking leveling, machines end flat；
Second step, connecting plate end flat degree requires as 0.2mm, and dowel hole position degree requires as 0.4mm, and dimensional tolerance is
0.2mm, for ensureing form and position tolerance and the size tolerance requirements of dowel hole, can accurately to position after splitting, will be adjacent
Two pieces of connecting plates are spot-welded together, join and get out connecting hole, and bore each dowel hole of expansion；
Two pieces of connecting plates after machine adds hole position, then are connected and lock with bolt by the 3rd step, burn-on technique in the periphery of connecting plate
Block, prevents connecting plate from sliding when welding with shield body and deforming；
4th step, after the part on each piecemeal of shield body has welded and aligned, all shield body piecemeal groups is combined on same circle, and
The locational space that cutting is welded with connecting plate school, the size cut off should ensure that loading onto connecting plate post gap is less than 2mm；
5th step, after cutting out connecting plate installation site, the paired connecting plate fixed is installed in adjustment with bolt, checks school weldering
The gap of position, if differing from 2mm, carries out built-up welding to the position exceeding it is ensured that gap is little and uniform, when being welded to connect plate with minimizing
Deflection, ensure that when being welded to connect plate combination connecting plate both sides are welded simultaneously, and apply in the both sides of each pair connecting plate simultaneously
Weldering, to reduce the deformation producing because of different stress；
6th step, pulls down the bolt of connecting plate after shield body cools down completely again after integral solder, cut away on connecting plate periphery
All unwelded positions are welded after fractionation by technique block；
All shield body piecemeals are reconfigured and clamping screw after the completion of welding, the axial direction of large-diameter shield shield body by the 7th step again
Using sectional making, in addition to anterior shield with middle shield, shield tail is divided into two sections of splicings of before and after, passes through welding and realize mutual connection between segmentation
Connect, after section cylinder assembly in front and back, ensuring coaxiality is in the margin of tolerance allowing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611043168.6A CN106363369A (en) | 2016-11-24 | 2016-11-24 | Shield machining method for large-diameter shield tunneling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611043168.6A CN106363369A (en) | 2016-11-24 | 2016-11-24 | Shield machining method for large-diameter shield tunneling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106363369A true CN106363369A (en) | 2017-02-01 |
Family
ID=57892269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611043168.6A Pending CN106363369A (en) | 2016-11-24 | 2016-11-24 | Shield machining method for large-diameter shield tunneling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106363369A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108971904A (en) * | 2018-08-16 | 2018-12-11 | 中铁工程装备集团盾构再制造有限公司 | Large-diameter shield machine shield body processing method |
| CN113634993A (en) * | 2021-08-13 | 2021-11-12 | 中铁科工集团轨道交通装备有限公司 | Large-diameter split shield body machining method |
-
2016
- 2016-11-24 CN CN201611043168.6A patent/CN106363369A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108971904A (en) * | 2018-08-16 | 2018-12-11 | 中铁工程装备集团盾构再制造有限公司 | Large-diameter shield machine shield body processing method |
| CN113634993A (en) * | 2021-08-13 | 2021-11-12 | 中铁科工集团轨道交通装备有限公司 | Large-diameter split shield body machining method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170201 |
|
| WD01 | Invention patent application deemed withdrawn after publication |