CN104801920A - Shield tunneling machine hydraulic cylinder piston rod surface repairing re-manufacturing method - Google Patents
Shield tunneling machine hydraulic cylinder piston rod surface repairing re-manufacturing method Download PDFInfo
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- CN104801920A CN104801920A CN201510112992.1A CN201510112992A CN104801920A CN 104801920 A CN104801920 A CN 104801920A CN 201510112992 A CN201510112992 A CN 201510112992A CN 104801920 A CN104801920 A CN 104801920A
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- piston rod
- welding
- oil
- shield machine
- soldering
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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
- B23P6/00—Restoring or reconditioning objects
- B23P6/02—Pistons or cylinders
Abstract
The invention discloses a shield tunneling machine hydraulic cylinder piston rod surface repairing re-manufacturing method. The method is mainly used for repairing a piston rod (4), and the piston rod (4) is tightly matched with a guide sleeve (2) through a seal ring (3) in the working process. Therefore, a piston (6), the piston rod (4), the guide sleeve (2) and a cylinder barrel (5) form an airtight closed cavity, and hydraulic oil in a rod cavity is effectively sealed. The piston rod (4) is exposed in the air, environment is relatively severe, the piston rod (4) is easily damaged by the outside environment and accordingly sealing effect is influenced. The shield tunneling machine oil cylinder piston rod surface repairing re-manufacturing method enables the damaged piston rod to meet the using requirement again, and oil cylinder replacement cost is reduced.
Description
Technical field
The present invention relates to shield machine field, be specially a kind of shield machine hydraulic cylinder piston rod surface reconditioning method of manufacturing technology again.
Background technology
Shield machine production cost is higher, and after the mileage that shield machine construction reaches certain, damage to a certain degree or wearing and tearing all appear in mechanical, electrical, liquid element in a large number.Shield machine cylinder piston rod operating mode is severe, is exposed among air, is subject to the shock of other parts or pendant thing etc. unavoidably, causes surface damage on piston rod, reduce the sealing property of oil cylinder, even pressure release in construction.Shield machine oil cylinder mostly is nonstandard product, and as changed, cost is high, the cycle is long, and general construction party is difficult to accept.
Summary of the invention
The technical problem to be solved in the present invention is, provide a kind of can repair oil cylinder and easy and simple to handle, the cycle is short and the shield machine hydraulic cylinder piston rod surface reconditioning method of manufacturing technology again that expense is low.
For solving the problems of the technologies described above, the invention provides a kind of shield machine hydraulic cylinder piston rod surface reconditioning method of manufacturing technology again, comprising the steps:
Step one: pull down damage oil cylinder from shield machine;
Step 2: during reparation, as find piston rod radial, axially local have slightly pull, plucking, available thin abrasive paper for metallograph and oilstone reconditioning; If piston rod is damaged, scratch, pull, chromium coating come off and corrosion etc. is more serious time, then can adopt Repair Welding;
Step 3: use common AC welding set, adopts small area analysis (50 ~ 80A) welding; Use stainless steel welding electrode, its diameter is 2.5mm or 3.2mm, and primary alloy constituent is chromium, nickel etc.Piston rod is generally No. 45 structural steel or the manufacture of 40Cr low-alloy steel, carries out modifier treatment fine finishining again after roughing.High-frequency quenching is carried out to its surface, makes case hardness reach HRC45 ~ 55.Close with stainless steel electrode institutional framework after piston rod surface chromium plating, therefore piston rod preheating is not easily cracked yet before weldering: the metal level of soldering can melt well mutually with piston rod parent, and intensity, hardness, wearability and anti-corrosion ability etc. all can meet instructions for use.During soldering, piston rod surface is eliminated rust, puts after cleaning up on v block on the table, v block is lined with asbestos board, prevent damaging contact face.With narrow meshed asbestos board lid on the piston rod, aperture is faced needs the position of soldering.Ground strap is ridden on the pin ear of piston rod, can soldering be carried out.In order to reduce mother metal fusing amount and control to minimum by heat effects district, spot welding or short weldering should be adopted.When damage location (pull, pit and corrosion etc.) area is little, can once complete soldering work.If damaged area is comparatively large, when radial, axial kerve is darker, then do not allow once to be soldered, must carry out several times being interrupted, balanced welding; Welding again after it cools substantially, prevents the larger stress deformation of the too high generation of temperature;
Step 4: first use rasp filing, checks whether welding welds reality, with or without sand holes, rosin joint etc., and should repair welding again if having.Smooth file is used instead to when leaving the surplus of 0.20-0.50mm when swinging filing along the radial circular arc of piston rod; Check that (axis) repaiies file position at any time with edge of a knife chi or angle square seamed edge, in time leaving about 50 μm surpluses, be stained with oil (hydraulic oil or diesel oil) fine grinding with fine oil stone, waterproof abrasive paper; Finally be stained with machine oil or hydraulic oil polishing with the emery cloth back side, make precision reach requirement.After piston rod reconditioning is good, should clean up, be placed on the v block of platform, piston rod external cylindrical surface is measured with dial gauge, the radial beat eccentricity of axis must not be greater than 20 μm, and the straightness error of piston rod in length range can not be greater than 0.20mm, and the circularity of piston rod and cylindricity should meet the requirements;
Step 5: carry out round total travel motion test, internal leakage test and pressurize test successively, repaired after pass the test;
Step 6: oil cylinder assembling is restored, and is assemblied on shield machine.
Can find out that tool of the present invention has the following advantages according to such scheme: shield machine oil cylinder re-manufacturing technology of the present invention, damaged injury is subject to mainly for shield machine cylinder piston rod surface, the oil cylinder that can not reach instructions for use is repaired, and adopts the method, easy, the cycle is short, expense is low.
As preferably, whether described step one can be selected dismantle according to actual conditions, as oil cylinder present position constructability, can not dismantle, directly repair.
As preferably, described damage location refer to pull, the damage of pit and corrosion class.
Accompanying drawing explanation
Fig. 1 is example generic cylinder structure schematic diagram of the present invention.
Accompanying drawing illustrates: 1. screw rod 2. fairlead 3. sealing ring 4. piston rod 5. cylinder barrel 6. sealing ring 7. cylinder head 8. bearing pin 9. location-plate
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Cylinder structure is not changed in implementation process, only the piston rod of damage is repaired, by following scheme, piston rod injury region is repaired.
Step one: pull down damage oil cylinder (this step is carried out according to actual conditions, as oil cylinder present position constructability, can not dismantle, directly repair) from shield machine.
Step 2: during reparation, as find piston rod radial, axially local have slightly pull, plucking, available thin abrasive paper for metallograph and oilstone reconditioning.If piston rod is damaged, scratch, pull, chromium coating come off and corrosion etc. is more serious time, then can adopt Repair Welding.
Step 3: use common AC welding set, adopts small area analysis (50 ~ 80A) welding; Use stainless steel welding electrode, its diameter is 2.5mm or 3.2mm, and primary alloy constituent is chromium, nickel etc.Piston rod is generally No. 45 structural steel or the manufacture of 40Cr low-alloy steel, carries out modifier treatment fine finishining again after roughing.High-frequency quenching is carried out to its surface, makes case hardness reach HRC45 ~ 55.Close with stainless steel electrode institutional framework after piston rod surface chromium plating, therefore piston rod preheating is not easily cracked yet before weldering: the metal level of soldering can melt well mutually with piston rod parent, and intensity, hardness, wearability and anti-corrosion ability etc. all can meet instructions for use.During soldering, piston rod surface is eliminated rust, puts after cleaning up on v block on the table, v block is lined with asbestos board, prevent damaging contact face.With narrow meshed asbestos board lid on the piston rod, aperture is faced needs the position of soldering.Ground strap is ridden on the pin ear of piston rod, can soldering be carried out.In order to reduce mother metal fusing amount and control to minimum by heat effects district, spot welding or short weldering should be adopted.When damage location (pull, pit and corrosion etc.) area is little, can once complete soldering work.If damaged area is comparatively large, when radial, axial kerve is darker, then do not allow once to be soldered, must carry out several times being interrupted, balanced welding; Welding again after it cools substantially, prevents the larger stress deformation of the too high generation of temperature.
Step 4: first use rasp filing, checks whether welding welds reality, with or without sand holes, rosin joint etc., and should repair welding again if having.Smooth file is used instead to when leaving the surplus of 0.20-0.50mm when swinging filing along the radial circular arc of piston rod; Check that (axis) repaiies file position at any time with edge of a knife chi or angle square seamed edge, in time leaving about 50 μm surpluses, be stained with oil (hydraulic oil or diesel oil) fine grinding with fine oil stone, waterproof abrasive paper; Finally be stained with machine oil or hydraulic oil polishing with the emery cloth back side, make precision reach requirement.After piston rod reconditioning is good, should clean up, be placed on the v block of platform, piston rod external cylindrical surface is measured with dial gauge, the radial beat eccentricity of axis must not be greater than 20 μm, and the straightness error of piston rod in length range can not be greater than 0.20mm, and the circularity of piston rod and cylindricity should meet the requirements.
Step 5: carry out round total travel motion test, internal leakage test and pressurize test successively, repaired after pass the test.
Step 6: oil cylinder assembling is restored, and is assemblied on shield machine.
Be described the present invention and embodiment thereof above, this description does not have restricted, and shown in accompanying drawing is also one of embodiments of the present invention, and actual structure is not limited thereto.If generally speaking those of ordinary skill in the art enlightens by it, when not departing from the invention aim, designing the frame mode similar to this technical scheme and embodiment without creationary, all should protection scope of the present invention be belonged to.
Claims (3)
1. a shield machine hydraulic cylinder piston rod surface reconditioning method of manufacturing technology again, comprises the steps:
Step one: pull down damage oil cylinder from shield machine;
Step 2: during reparation, as find piston rod radial, axially local have slightly pull, plucking, available thin abrasive paper for metallograph and oilstone reconditioning; If piston rod is damaged, scratch, pull, chromium coating come off and corrosion etc. is more serious time, then can adopt Repair Welding;
Step 3: use common AC welding set, adopts small area analysis (50 ~ 80A) welding; Use stainless steel welding electrode, its diameter is 2.5mm or 3.2mm, and primary alloy constituent is chromium, nickel etc.; Piston rod is generally No. 45 structural steel or the manufacture of 40Cr low-alloy steel, carries out modifier treatment fine finishining again after roughing; High-frequency quenching is carried out to its surface, makes case hardness reach HRC45 ~ 55; Close with stainless steel electrode institutional framework after piston rod surface chromium plating, therefore piston rod preheating is not easily cracked yet before weldering: the metal level of soldering can melt well mutually with piston rod parent, and intensity, hardness, wearability and anti-corrosion ability etc. all can meet instructions for use; During soldering, piston rod surface is eliminated rust, puts after cleaning up on v block on the table, v block is lined with asbestos board, prevent damaging contact face; With narrow meshed asbestos board lid on the piston rod, aperture is faced needs the position of soldering; Ground strap is ridden on the pin ear of piston rod, can soldering be carried out; In order to reduce mother metal fusing amount and control to minimum by heat effects district, spot welding or short weldering should be adopted; When damage location area is little, can once complete soldering work; If damaged area is comparatively large, when radial, axial kerve is darker, then do not allow once to be soldered, must carry out several times being interrupted, balanced welding; Welding again after it cools substantially, prevents the larger stress deformation of the too high generation of temperature;
Step 4: first use rasp filing, checks whether welding welds reality, with or without sand holes, rosin joint etc., and should repair welding again if having; Smooth file is used instead to when leaving the surplus of 0.20-0.50mm when swinging filing along the radial circular arc of piston rod; Check that (axis) repaiies file position at any time with edge of a knife chi or angle square seamed edge, in time leaving about 50 μm surpluses, be stained with oil (hydraulic oil or diesel oil) fine grinding with fine oil stone, waterproof abrasive paper; Finally be stained with machine oil or hydraulic oil polishing with the emery cloth back side, make precision reach requirement; After piston rod reconditioning is good, should clean up, be placed on the v block of platform, piston rod external cylindrical surface is measured with dial gauge, the radial beat eccentricity of axis must not be greater than 20 μm, and the straightness error of piston rod in length range can not be greater than 0.20mm, and the circularity of piston rod and cylindricity should meet the requirements;
Step 5: carry out round total travel motion test, internal leakage test and pressurize test successively, repaired after pass the test;
Step 6: oil cylinder assembling is restored, and is assemblied on shield machine.
2. shield machine hydraulic cylinder piston rod surface reconditioning method of manufacturing technology more according to claim 1: whether described step one can be selected dismantle according to actual conditions, as oil cylinder present position constructability, can not dismantle, directly repair.
3. shield machine hydraulic cylinder piston rod surface reconditioning method of manufacturing technology more according to claim 1: described damage location refer to pull, the damage of pit and corrosion class.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510112992.1A CN104801920A (en) | 2015-03-16 | 2015-03-16 | Shield tunneling machine hydraulic cylinder piston rod surface repairing re-manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510112992.1A CN104801920A (en) | 2015-03-16 | 2015-03-16 | Shield tunneling machine hydraulic cylinder piston rod surface repairing re-manufacturing method |
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| CN104801920A true CN104801920A (en) | 2015-07-29 |
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| CN201510112992.1A Pending CN104801920A (en) | 2015-03-16 | 2015-03-16 | Shield tunneling machine hydraulic cylinder piston rod surface repairing re-manufacturing method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109623275A (en) * | 2018-12-17 | 2019-04-16 | 安徽中达液压机电再制造科技有限公司 | A kind of reproducing method of hydraulic support column |
| CN109664066A (en) * | 2019-01-29 | 2019-04-23 | 中国建筑第二工程局有限公司 | A kind of movable arm tower crane hydraulic lifting oil cylinder restorative procedure |
| CN111571116A (en) * | 2020-07-03 | 2020-08-25 | 杭州拉段机械科技有限公司 | Equipment capable of automatically repairing surface of hydraulic cylinder piston rod with strain |
| CN111673372A (en) * | 2020-06-16 | 2020-09-18 | 大连天晟通用机械有限公司 | Method for renovating thread insert |
| CN112222756A (en) * | 2020-10-21 | 2021-01-15 | 北京建工土木工程有限公司 | Method for repairing cutter head of shield tunneling machine |
| CN112247391A (en) * | 2020-10-21 | 2021-01-22 | 北京建工土木工程有限公司 | Method for repairing piston rod of hydraulic cylinder of shield tunneling machine |
| CN114074243A (en) * | 2020-08-14 | 2022-02-22 | 山西庞泉重型机械制造有限公司 | Method for repairing surface of two cylinders of piston rod based on girth welding cladding process |
| CN114083224A (en) * | 2021-11-26 | 2022-02-25 | 国网四川省电力公司映秀湾水力发电总厂 | Repair method for fixed guide vane of mixed-flow water turbine |
-
2015
- 2015-03-16 CN CN201510112992.1A patent/CN104801920A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109623275A (en) * | 2018-12-17 | 2019-04-16 | 安徽中达液压机电再制造科技有限公司 | A kind of reproducing method of hydraulic support column |
| CN109664066A (en) * | 2019-01-29 | 2019-04-23 | 中国建筑第二工程局有限公司 | A kind of movable arm tower crane hydraulic lifting oil cylinder restorative procedure |
| CN111673372A (en) * | 2020-06-16 | 2020-09-18 | 大连天晟通用机械有限公司 | Method for renovating thread insert |
| CN111571116A (en) * | 2020-07-03 | 2020-08-25 | 杭州拉段机械科技有限公司 | Equipment capable of automatically repairing surface of hydraulic cylinder piston rod with strain |
| CN111571116B (en) * | 2020-07-03 | 2020-11-20 | 杭州拉段机械科技有限公司 | Equipment capable of automatically repairing surface of hydraulic cylinder piston rod with strain |
| CN114074243A (en) * | 2020-08-14 | 2022-02-22 | 山西庞泉重型机械制造有限公司 | Method for repairing surface of two cylinders of piston rod based on girth welding cladding process |
| CN112222756A (en) * | 2020-10-21 | 2021-01-15 | 北京建工土木工程有限公司 | Method for repairing cutter head of shield tunneling machine |
| CN112247391A (en) * | 2020-10-21 | 2021-01-22 | 北京建工土木工程有限公司 | Method for repairing piston rod of hydraulic cylinder of shield tunneling machine |
| CN114083224A (en) * | 2021-11-26 | 2022-02-25 | 国网四川省电力公司映秀湾水力发电总厂 | Repair method for fixed guide vane of mixed-flow water turbine |
| CN114083224B (en) * | 2021-11-26 | 2022-11-15 | 国网四川省电力公司映秀湾水力发电总厂 | Repair method of fixed guide vane of mixed-flow water turbine |
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Application publication date: 20150729 |
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