CN108971904A - Large-diameter shield machine shield body processing method - Google Patents
Large-diameter shield machine shield body processing method Download PDFInfo
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- CN108971904A CN108971904A CN201810932558.1A CN201810932558A CN108971904A CN 108971904 A CN108971904 A CN 108971904A CN 201810932558 A CN201810932558 A CN 201810932558A CN 108971904 A CN108971904 A CN 108971904A
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- 238000003672 processing method Methods 0.000 title claims abstract description 29
- 238000005520 cutting process Methods 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 238000004321 preservation Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 239000002826 coolant Substances 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 238000005192 partition Methods 0.000 claims abstract description 7
- 238000010583 slow cooling Methods 0.000 claims abstract description 7
- 230000000630 rising effect Effects 0.000 claims abstract description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000005336 cracking Methods 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 229910001566 austenite Inorganic materials 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses large-diameter shield machine shield body processing methods, comprising the following steps: steel are tentatively shaped to blank material by S1, the raw material for choosing anterior shield, will be cooling after blank material heating and thermal insulation, and will be quickly cooled down after its again heating and thermal insulation；S2, will be quickly cooled down in coolant liquid after blank material heating and thermal insulation and continue to heat, by its Slow cooling at room temperature after heat preservation, blank material after cooling is placed in liquid nitrogen take out after 2h-3h first product is obtained after rising again under room temperature after it is spare；S3, by first product automatic cutting, and process inner hole in first product, gusset, partition and cone-plate be welded on plate according to bottom-to-top method, obtain anterior shield；The processing of S4, middle shield, tail shield；S5, assembling: assembling anterior shield, middle shield and tail shield, and the present invention obtains single uniform austenite structure, reduce the plasticity and impact toughness of shield body, deformation and the cracking of shield body are reduced, so that shield body bears higher impact force by heating and cooling treatment.
Description
Technical field
The present invention relates to technical field of mechanical processing more particularly to large-diameter shield machine shield body processing methods.
Background technique
Large-diameter shield machine has the characteristics that high in technological content, manufacturing process is complicated, added value of product is high, represents existing
The high-tech of tunneling boring tunnel piercing equipment field is horizontal and the main direction of development, and shield method tunnel construction technology is to buried
Layer, big cross section, long range direction are fast-developing, and have built up the seabed tunnel and urban transportation tunnel of a collection of major diameter.Shield
The shield body of machine needs to protect the inside raw material of shield machine when in use, therefore the shield body of shield machine is wanted in use
Biggish impact force is born, therefore usually occurs cracking or damaging.
Therefore, we have proposed large-diameter shield machine shield body processing methods for solving the above problems.
Summary of the invention
The purpose of the present invention is to solve the shield body that shield machine exists in the prior art to bear in use compared with
Big impact force, it may appear that the shortcomings that cracking or damaging, and the large-diameter shield machine shield body processing method proposed.
Large-diameter shield machine shield body processing method, comprising the following steps:
S1, the raw material that Q345B steel are anterior shield is chosen, steel is tentatively shaped to base according to the shape of anterior shield by hydraulic press
Blank material is heated to 1100 DEG C -1200 DEG C, is cooled to room temperature after keeping the temperature for the first time by material, and be again heated to 1100 DEG C -
It 1200 DEG C, is quickly cooled down in coolant liquid after second of heat preservation；
S2, blank material is heated to 800-850 DEG C, third time is rapidly cooled to room temperature in coolant liquid after keeping the temperature, and continues to heat
To 80 DEG C, by its Slow cooling at room temperature after the 4th heat preservation, taken out after blank material after cooling is placed 2h-3h in liquid nitrogen
It is obtained after rising again under room temperature spare after first product；
S3, by first product automatic cutting, and inner hole is processed in first product, by gusset, partition and cone-plate according to from bottom to top
Method is welded on plate, obtains anterior shield；
The processing of S4, middle shield, tail shield；
S5, assembling: being that protective gas assembles anterior shield, middle shield and tail shield using carbon dioxide, middle shield and anterior shield pass through
Flange is fixedly connected with high-strength bolt, and middle shield and tail shield are connected with each other by hinged oil cylinder.
Preferably, the time that the first time keeps the temperature is 6h-8h, and the time of second of heat preservation is for 24 hours, to keep the temperature for the third time
Time is 6h-8h, and the time of the 4th heat preservation is that for 24 hours, the time risen again is 12h.
Preferably, the plane of the notch of the cutting and first product is in 90 °, and the smooth cut of cutting is smooth, and uses steel
Wire brush polishes to the notch of first product, removes oxidation piece, iron rust and the scum of cut surface.
Preferably, the process of the inner hole is the center line and processing zero point of determining inner hole, is existed according to machined parameters
Processing zero point cuts first product, the parameter of cutting are as follows: back engagement of the cutting edge 0.3mm, feed speed 200mm/min, revolving speed
For 60r/min.
Preferably, the middle shield and the processing method of tail shield and the processing method of anterior shield are identical.
Preferably, the quantity of the hinged oil cylinder has 14.
The beneficial effects of the present invention are:
1, of the invention, by the way that shield body can also be reduced to heating and cooling treatment, available single uniform austenite structure
Plasticity and impact toughness, reduce deformation and the cracking of shield body, adjustment hardness and stablize workpiece size, so that shield body internal structure
It is even closer, it is able to bear stronger external pressure, shield body is born higher impact force.
2, of the invention, middle shield and anterior shield connected by the bolt of high intensity so that anterior shield connected with middle shield it is stronger, in
The articulated connection of shield and tail shield can make shield machine be easier to turn to, so that the flexibility ratio of shield machine is higher, shield of being more convenient for
The work of machine.
Specific embodiment
Combined with specific embodiments below the present invention is made further to explain.
Embodiment one: large-diameter shield machine shield body processing method, comprising the following steps:
S1, the raw material that Q345B steel are anterior shield is chosen, steel is tentatively shaped to base according to the shape of anterior shield by hydraulic press
Blank material is heated to 1100 DEG C, is cooled to room temperature after keeping the temperature 6h for the first time, and be again heated to 1100 DEG C, second by material
It is quickly cooled down in coolant liquid after heat preservation for 24 hours；
S2, blank material is heated to 800, third time is rapidly cooled to room temperature in coolant liquid after keeping the temperature 6h, and continues to be heated to 80
DEG C, the 4th heat preservation is for 24 hours afterwards by its Slow cooling at room temperature, and taking-up is in room after blank material after cooling to be placed to 2h in liquid nitrogen
It rises again under the conditions of temperature spare after obtaining first product after 12h；
S3, by first product automatic cutting, (in 90 °, the smooth cut of cutting is smooth, and makes for the notch of cutting and the plane of first product
Polished with notch of the wire brush to first product, remove oxidation piece, iron rust and the scum of cut surface), and in first product
(process of inner hole is the center line and processing zero point of determining inner hole to processing inner hole, according to machined parameters in processing zero point pair
First product is cut, the parameter of cutting are as follows: back engagement of the cutting edge 0.3mm, feed speed 200mm/min, revolving speed 60r/min),
Gusset, partition and cone-plate are welded on plate according to bottom-to-top method, obtain anterior shield；
The processing method of S4, middle shield and tail shield and the processing method of anterior shield are identical；
S5, assembling: being that protective gas assembles anterior shield, middle shield and tail shield using carbon dioxide, middle shield and anterior shield pass through
Flange is fixedly connected with high-strength bolt, and middle shield and tail shield are connected with each other by 14 hinged oil cylinders.
Embodiment two: large-diameter shield machine shield body processing method, comprising the following steps:
S1, the raw material that Q345B steel are anterior shield is chosen, steel is tentatively shaped to base according to the shape of anterior shield by hydraulic press
Blank material is heated to 1150 DEG C, is cooled to room temperature after keeping the temperature 7h for the first time, and be again heated to 1150 DEG C, second by material
It is quickly cooled down in coolant liquid after heat preservation for 24 hours；
S2, blank material is heated to 820 DEG C, third time is rapidly cooled to room temperature in coolant liquid after keeping the temperature 7h, and continues to be heated to
80 DEG C, the 4th heat preservation for 24 hours afterwards by its Slow cooling at room temperature, blank material after cooling is placed in liquid nitrogen after 2h taking-up in
It rises again under room temperature spare after obtaining first product after 12h；
S3, by first product automatic cutting, (in 90 °, the smooth cut of cutting is smooth, and makes for the notch of cutting and the plane of first product
Polished with notch of the wire brush to first product, remove oxidation piece, iron rust and the scum of cut surface), and in first product
(process of inner hole is the center line and processing zero point of determining inner hole to processing inner hole, according to machined parameters in processing zero point pair
First product is cut, the parameter of cutting are as follows: back engagement of the cutting edge 0.3mm, feed speed 200mm/min, revolving speed 60r/min),
Gusset, partition and cone-plate are welded on plate according to bottom-to-top method, obtain anterior shield；
The processing method of S4, middle shield and tail shield and the processing method of anterior shield are identical；
S5, assembling: being that protective gas assembles anterior shield, middle shield and tail shield using carbon dioxide, middle shield and anterior shield pass through
Flange is fixedly connected with high-strength bolt, and middle shield and tail shield are connected with each other by 14 hinged oil cylinders.
Embodiment three: large-diameter shield machine shield body processing method, comprising the following steps:
S1, the raw material that Q345B steel are anterior shield is chosen, steel is tentatively shaped to base according to the shape of anterior shield by hydraulic press
Blank material is heated to 1150 DEG C, is cooled to room temperature after keeping the temperature 7h for the first time, and be again heated to 1150 DEG C, second by material
It is quickly cooled down in coolant liquid after heat preservation for 24 hours；
S2, blank material is heated to 830 DEG C, third time is rapidly cooled to room temperature in coolant liquid after keeping the temperature 7h, and continues to be heated to
80 DEG C, the 4th heat preservation for 24 hours afterwards by its Slow cooling at room temperature, blank material after cooling is placed in liquid nitrogen after 3h taking-up in
It rises again under room temperature spare after obtaining first product after 12h；
S3, by first product automatic cutting, (in 90 °, the smooth cut of cutting is smooth, and makes for the notch of cutting and the plane of first product
Polished with notch of the wire brush to first product, remove oxidation piece, iron rust and the scum of cut surface), and in first product
(process of inner hole is the center line and processing zero point of determining inner hole to processing inner hole, according to machined parameters in processing zero point pair
First product is cut, the parameter of cutting are as follows: back engagement of the cutting edge 0.3mm, feed speed 200mm/min, revolving speed 60r/min),
Gusset, partition and cone-plate are welded on plate according to bottom-to-top method, obtain anterior shield；
The processing method of S4, middle shield and tail shield and the processing method of anterior shield are identical；
S5, assembling: being that protective gas assembles anterior shield, middle shield and tail shield using carbon dioxide, middle shield and anterior shield pass through
Flange is fixedly connected with high-strength bolt, and middle shield and tail shield are connected with each other by 14 hinged oil cylinders.
Example IV: large-diameter shield machine shield body processing method, comprising the following steps:
S1, the raw material that Q345B steel are anterior shield is chosen, steel is tentatively shaped to base according to the shape of anterior shield by hydraulic press
Blank material is heated to 1200 DEG C, is cooled to room temperature after keeping the temperature 8h for the first time, and be again heated to 1200 DEG C, second by material
It is quickly cooled down in coolant liquid after heat preservation for 24 hours；
S2, blank material is heated to 850 DEG C, third time is rapidly cooled to room temperature in coolant liquid after keeping the temperature 8h, and continues to be heated to
80 DEG C, the 4th heat preservation for 24 hours afterwards by its Slow cooling at room temperature, blank material after cooling is placed in liquid nitrogen after 3h taking-up in
It rises again under room temperature spare after obtaining first product after 12h；
S3, by first product automatic cutting, (in 90 °, the smooth cut of cutting is smooth, and makes for the notch of cutting and the plane of first product
Polished with notch of the wire brush to first product, remove oxidation piece, iron rust and the scum of cut surface), and in first product
(process of inner hole is the center line and processing zero point of determining inner hole to processing inner hole, according to machined parameters in processing zero point pair
First product is cut, the parameter of cutting are as follows: back engagement of the cutting edge 0.3mm, feed speed 200mm/min, revolving speed 60r/min),
Gusset, partition and cone-plate are welded on plate according to bottom-to-top method, obtain anterior shield；
The processing method of S4, middle shield and tail shield and the processing method of anterior shield are identical；
S5, assembling: being that protective gas assembles anterior shield, middle shield and tail shield using carbon dioxide, middle shield and anterior shield pass through
Flange is fixedly connected with high-strength bolt, and middle shield and tail shield are connected with each other by 14 hinged oil cylinders.
By embodiment one, embodiment two, it is hard that large-diameter shield machine shield body made of embodiment three and example IV tests it
Degree, test result is as follows:
| Embodiment one | Embodiment two | Embodiment three | Example IV | |
| Hardness (HRC) | 96 | 98 | 97 | 97 |
By above-mentioned test result it is found that embodiment one, embodiment two, large-diameter shield made of embodiment three and example IV
The hardness of machine shield body is big, therefore is not easily susceptible to cracking or damages.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. large-diameter shield machine shield body processing method, which comprises the following steps:
S1, the raw material that Q345B steel are anterior shield is chosen, steel is tentatively shaped to base according to the shape of anterior shield by hydraulic press
Blank material is heated to 1100 DEG C -1200 DEG C, is cooled to room temperature after keeping the temperature for the first time by material, and be again heated to 1100 DEG C -
It 1200 DEG C, is quickly cooled down in coolant liquid after second of heat preservation；
S2, blank material is heated to 800-850 DEG C, third time is rapidly cooled to room temperature in coolant liquid after keeping the temperature, and continues to heat
To 80 DEG C, by its Slow cooling at room temperature after the 4th heat preservation, taken out after blank material after cooling is placed 2h-3h in liquid nitrogen
It is obtained after rising again under room temperature spare after first product；
S3, by first product automatic cutting, and inner hole is processed in first product, by gusset, partition and cone-plate according to from bottom to top
Method is welded on plate, obtains anterior shield；
The processing of S4, middle shield, tail shield；
S5, assembling: being that protective gas assembles anterior shield, middle shield and tail shield using carbon dioxide, middle shield and anterior shield pass through
Flange is fixedly connected with high-strength bolt, and middle shield and tail shield are connected with each other by hinged oil cylinder.
2. large-diameter shield machine shield body processing method according to claim 1, which is characterized in that the first time heat preservation
Time is 6h-8h, and the time of second heat preservation is that for 24 hours, the time of third time heat preservation is 6h-8h, and the time of the 4th heat preservation is
For 24 hours, the time risen again is 12h.
3. large-diameter shield machine shield body processing method according to claim 1, which is characterized in that the notch of the cutting with
The plane of first product is in 90 °, and the smooth cut of cutting is smooth, and is polished using notch of the wire brush to first product, is removed
Oxidation piece, iron rust and the scum of cut surface.
4. large-diameter shield machine shield body processing method according to claim 1, which is characterized in that the inner hole it is processed
Journey is the center line and processing zero point of determining inner hole, is cut in processing zero point first product according to machined parameters, cutting
Parameter are as follows: back engagement of the cutting edge 0.3mm, feed speed 200mm/min, revolving speed 60r/min.
5. large-diameter shield machine shield body processing method according to claim 1, which is characterized in that the middle shield and tail shield
Processing method is identical as the processing method of anterior shield.
6. large-diameter shield machine shield body processing method according to claim 1, which is characterized in that the number of the hinged oil cylinder
Amount has 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810932558.1A CN108971904A (en) | 2018-08-16 | 2018-08-16 | Large-diameter shield machine shield body processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810932558.1A CN108971904A (en) | 2018-08-16 | 2018-08-16 | Large-diameter shield machine shield body processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108971904A true CN108971904A (en) | 2018-12-11 |
Family
ID=64554006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810932558.1A Pending CN108971904A (en) | 2018-08-16 | 2018-08-16 | Large-diameter shield machine shield body processing method |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN102699639A (en) * | 2012-06-29 | 2012-10-03 | 北方重工集团有限公司 | Technique for integrally manufacturing semi-structure of full-face tunneling machine shield |
| US20130230416A1 (en) * | 2012-03-05 | 2013-09-05 | Electrolux Home Products, Inc. | Safety arrangement for an integrated heater, pump, and motor for an appliance |
| US20150040393A1 (en) * | 2013-08-07 | 2015-02-12 | Yevgeniy Shteyman | Manufacturing method for exhaust diffuser shell with strut shield collar and joint flange |
| CN106363368A (en) * | 2016-11-18 | 2017-02-01 | 陕西高华知本化工科技有限公司 | Shield machining method for Lian tang shield tunneling machine |
| CN106363369A (en) * | 2016-11-24 | 2017-02-01 | 陕西启源科技发展有限责任公司 | Shield machining method for large-diameter shield tunneling machine |
| CN107881402A (en) * | 2017-11-23 | 2018-04-06 | 方晓超 | A kind of preparation method of bearing ring |
| CN207315384U (en) * | 2017-10-16 | 2018-05-04 | 中船重型装备有限公司 | A kind of shield machine shield body articulated mounting |
-
2018
- 2018-08-16 CN CN201810932558.1A patent/CN108971904A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102189381A (en) * | 2011-04-22 | 2011-09-21 | 唐山金辉五金工具制造有限公司 | Method for integrally forging combined bow-shaped rake |
| US20130230416A1 (en) * | 2012-03-05 | 2013-09-05 | Electrolux Home Products, Inc. | Safety arrangement for an integrated heater, pump, and motor for an appliance |
| CN102699639A (en) * | 2012-06-29 | 2012-10-03 | 北方重工集团有限公司 | Technique for integrally manufacturing semi-structure of full-face tunneling machine shield |
| US20150040393A1 (en) * | 2013-08-07 | 2015-02-12 | Yevgeniy Shteyman | Manufacturing method for exhaust diffuser shell with strut shield collar and joint flange |
| CN106363368A (en) * | 2016-11-18 | 2017-02-01 | 陕西高华知本化工科技有限公司 | Shield machining method for Lian tang shield tunneling machine |
| CN106363369A (en) * | 2016-11-24 | 2017-02-01 | 陕西启源科技发展有限责任公司 | Shield machining method for large-diameter shield tunneling machine |
| CN207315384U (en) * | 2017-10-16 | 2018-05-04 | 中船重型装备有限公司 | A kind of shield machine shield body articulated mounting |
| CN107881402A (en) * | 2017-11-23 | 2018-04-06 | 方晓超 | A kind of preparation method of bearing ring |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 300000 Tianjin Binhai New Area free trade pilot area (Dongjiang Port Free Trade Zone) Tibet Road No. 369 Applicant after: China Railway Engineering Equipment Group (Tianjin) Co., Ltd Address before: 300000 Tianjin Binhai New Area free trade pilot area (Dongjiang Port Free Trade Zone) Tibet Road No. 369 Applicant before: CHINA RAILWAY ENGINEERING EQUIPMENT GROUP SHIELD REMANUFACTURING Co.,Ltd. |
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Application publication date: 20181211 |