CN103192226B - Method for remedying water-eroded defects on finished surface of engine cylinder block - Google Patents
Method for remedying water-eroded defects on finished surface of engine cylinder block Download PDFInfo
- Publication number
- CN103192226B CN103192226B CN201310141168.XA CN201310141168A CN103192226B CN 103192226 B CN103192226 B CN 103192226B CN 201310141168 A CN201310141168 A CN 201310141168A CN 103192226 B CN103192226 B CN 103192226B
- Authority
- CN
- China
- Prior art keywords
- cylinder block
- finished surface
- welding position
- reconditioning
- engine cylinder
- 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.)
- Active
Links
Abstract
The invention discloses a method for remedying water-eroded defects on the finished surface of an engine cylinder block and belongs to the technical field of engine cylinder block refabrication. The method includes: polishing the defective surface to expose a cylinder block body; polishing sharp corners or edges on the cylinder block body; removing oil at defective positions; re-polishing; cleaning the defective positions; remedying the defective positions by electric spark ionic microwelding to make the welded positions level to the finished surface of the cylinder block; polishing the welded positions to make the welded positions lower than the finished surface of the cylinder block; remedying the welded positions by pulse cold welding to make the welded positions higher than the finished surface of the cylinder block; and polishing the welded positions to make the welded positions level to the finished surface of the cylinder block. The method effectively guarantees fine bonding of welding material and substrate during welding. The electric spark ionic microwelding is reasonably combined with the pulse cold welding, so that efficiency is increased and the remedied texture is kept dense and non-defective.
Description
Technical field
The invention belongs to engine cylinder block re-manufacturing technology field, particularly relate to a kind of restorative procedure of engine cylinder block finished surface water erosion defect.
Background technology
Manufacturing is a kind of industry waste product being implemented to high-tech reparation and transformation again, its for be damage or be about to the parts scrapped, on the basis that performance failure analysis, life appraisal etc. are analyzed, carry out Rebuilding engineering design, adopt recovery technique, by workpiece shapes and accuracy resumption, the quality that makes to manufacture a product again meets or exceeds new product.
Engine cylinder block water erosion is the common defects that old engine cylinder block exists, the position ubiquity such as plane, water-jacket space blanking cover hole correspondence position and other and water contact surface on engine cylinder block.This defect is not repaired, in cylinder block by the use after manufacturing again, there will be leak, the serious problems such as water jacket perforation, cause engine normally not use, even scrap.Again because engine cylinder block is complex-shaped, machined surface, hole etc. are intensive and required precision is high, the improper meeting of restorative procedure causes relative dimensions overproof and scraps, therefore the reparation of water erosion defect becomes the technical barrier that engine cylinder block must be captured in manufacture process again, if this defect can not realize repairing, directly cause realizing manufacturing again of old engine cylinder block.
At present, the restorative procedure for engine cylinder block finished surface water erosion defect mainly contains following two kinds:
First method carries out processing process after adopting healant to fill up defect again, recover workpiece shapes and precision, mode filled up by healant is lean on the bonding force of healant healant and cylinder block bulk junction to be combined, adhesion is weak, easily come off, healant is the mixture of powder thing and adhesive, is incorporated on cylinder block body to solidify solidification mode, intensity and corrosion resistance deficiency, service life is short;
The common welding manner of second method carries out wlding accumulation at rejected region, carries out processing process, recover workpiece shapes and precision after filling up defect.Common welding manner wlding and cylinder block body is melted by high temperature, wlding is made to be piled up on cylinder block body, realize the repairing of defect, in banking process, cylinder block body heat affected zone is large, very easily causes the distortion of workpiece and causes workpiece to be scrapped, because workpiece shapes is complicated, be difficult to realize the measures such as the insulation in welding, welding stress is difficult to eliminate, and easily occurs the defects such as crackle in using.
Summary of the invention
Technical problem to be solved by this invention is: the restorative procedure providing a kind of engine cylinder block finished surface water erosion defect, with the unreliable technical problem causing being difficult to realize manufacturing again the engine cylinder block that there is water erosion defect of the restorative procedure solving existing engine cylinder block finished surface water erosion defect.
For solving the problems of the technologies described above, technical scheme of the present invention is: the restorative procedure of engine cylinder block finished surface water erosion defect, comprises the following steps implemented successively:
(1) reconditioning rejected region surface, exposes cylinder block body;
(2) wedge angle on cylinder block body described in reconditioning or seamed edge;
(3) oil of described rejected region is removed;
(4) the reconditioning process of step (1), step (2) is repeated;
(5) described rejected region is cleaned;
(6) repair described rejected region with the microbonding of electric spark ion, the finished surface of welding position and described cylinder block is maintained an equal level;
(7) welding position described in reconditioning, makes described welding position lower than the finished surface of described cylinder block;
(8) repair described welding position with pulse cold welding, make described welding position higher than the finished surface of described cylinder block;
(9) described welding position is milled to maintains an equal level with the finished surface of described cylinder block.
Improve as one, in step (3), utilize combustion method to remove oil, described combustion method is for smearing combustible medium at described rejected region and lighting.
As further improvement, in step (7) a metallic, described welding position 0.1mm ~ 0.2mm lower than described cylinder block finished surface.
As further improvement, in step (8), described welding position is than described cylinder block finished surface height 0.3mm ~ 0.5mm.
As further improvement, in step (1) and step (2), adopt wire wheel or the reconditioning of pneumatic grinding wheel trimmer; Adopt diamond abrasive tool reconditioning in step (7) a metallic; Surface grinding machine grinding is adopted in step (9).
As further improvement, the wlding of described electric spark ion microbonding is the nichrome of diameter 2mm; The wlding of described pulse cold welding is 0.1mm ~ 0.2mm dilval thin slice.
After have employed technique scheme, the invention has the beneficial effects as follows: owing to having carried out reconditioning, oil removing, again reconditioning and cleaning step to rejected region before welding, make to be combined to wlding the factor that impacts with cylinder block body and the factor of welding stress may be caused all thoroughly to eliminate, the good combination of wlding and cylinder block body when effectively ensureing follow-up welding; Due to the microbonding of electric spark ion and pulse cold welding equal action time short, heat effect district is minimum, abundant guarantee cylinder block body is without thermal deformation, thus ensure the relative dimensions precision being repaired workpiece, the reasonable combination of electric spark ion microbonding simultaneously and pulse cold welding, for the reparation of water erosion defect, both improve efficiency, in turn ensure that dense structure's zero defect after repairing; After having welded, described welding position is milled to and has maintained an equal level with described cylinder block finished surface, workpiece shapes and precision are recovered comprehensively, thus recovered the original performance of workpiece, completed the reparation to engine cylinder block finished surface water erosion defect.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
A restorative procedure for engine cylinder block finished surface water erosion defect, comprises the following steps implemented successively:
(1) reconditioning rejected region surface, can adopt wire wheel, pneumatic grinding wheel trimmer or other grinding tools etc., expose cylinder block body;
(2) wedge angle on this cylinder block body of reconditioning or seamed edge, can adopt wire wheel, pneumatic grinding wheel trimmer or other grinding tools etc.;
(3) remove the oil of this rejected region, utilize combustion method to remove oil, this combustion method is for smearing combustible medium at this rejected region and lighting, and preferably, combustible medium comprises the alcohols such as alcohol;
(4) the reconditioning process of step (1), step (2) is repeated;
(5) clean this rejected region, preferably adopt alcohol washes, other cleaning fluids can certainly be adopted;
(6) repair this rejected region with the microbonding of electric spark ion, the wlding of electric spark ion microbonding is preferably the nichrome of diameter 2mm, and the finished surface of welding position and this cylinder block is maintained an equal level;
(7) this welding position of reconditioning, makes this welding position lower than the finished surface of this cylinder block, preferably, and this welding position 0.1mm ~ 0.2mm lower than this cylinder block finished surface;
(8) this welding position is repaired with pulse cold welding, the wlding of pulse cold welding is preferably 0.1mm ~ 0.2mm dilval thin slice, make this welding position higher than the finished surface of this cylinder block, preferably, this welding position is than this cylinder block finished surface height 0.3mm ~ 0.5mm;
(9) this welding position is milled to maintains an equal level with the finished surface of this cylinder block, preferred planar grinding machine.
Embodiment one:
Repair the water erosion defect at position, plane string water hole on engine cylinder block, upper plane string water hole is the finished surface on engine cylinder block, and on other finished surfaces, corresponding defect repair process is identical, and it comprises the steps:
(1) according to the shape of rejected region, select this rejected region surface of wire wheel reconditioning, remove these rejected region surface oxide layer, greasy dirt etc. and be unfavorable for the factor that in follow-up welding process, wlding is combined with cylinder block body, expose this cylinder block body;
(2) with the wedge angle on this cylinder block body of wire wheel reconditioning or seamed edge, make the wedge angle on this cylinder block body or seamed edge realize rounding off, avoid follow-up welding process to occur in conjunction with bad;
(3) rejected region after reconditioning is coated alcohol and is lighted, and removes the oil immersed in this cylinder block body;
(4) the reconditioning process of step (1), step (2) is repeated;
(5) rejected region after reconditioning smears alcohol, cleans this rejected region, avoids follow-up welding process to occur in conjunction with bad;
(6) gas breakdown is formed ion-gas by the high frequency voltage utilizing electric spark ion microbonding machine to produce, thus the electric spark produced up to 8000 ° of more than C, utilize electric spark by meltability anode under argon shield instant melting on this cylinder block body, complete metal accumulation, welding position and this cylinder block finished surface are maintained an equal level, realize defect Rapid-Repair, the nichrome of the preferred diameter 2mm of meltability anode, because the electric spark activity duration is short, be generally for 1 ~ 10 nanosecond, this cylinder block body does not generate heat, indeformable, not undercut, this cylinder block body and wlding are combined into metallurgical binding, bond strength is good,
(7) problem of pore defect may be there is to eliminate the microbonding of electric spark ion, with this welding position of diamond abrasive tool reconditioning, making this welding position 0.1mm lower than this cylinder block finished surface;
(8) heavy current pulse adopting pulse cold welding machine to produce flows through the faying face of workpiece and wlding instantaneously, make its rapid melted join, make this welding position than this cylinder block finished surface height 0.3mm, wlding preferred 0.1mm dilval thin slice, because pulse cold welding action time is short, dash current is large, heat effect district is minimum, make this cylinder block body without thermal deformation, be metallurgical binding between this cylinder block body and wlding, bond strength is high, the fine and close zero defect of wlding, after ensure that the processing process of follow-up welding position, exposed wlding dense structure zero defect, compensate for the issuable pore defect of electric spark ion microbonding, and repair tissue and color are close to body,
(9) adopt surface grinding machine to be milled to this welding position to maintain an equal level with this cylinder block finished surface, workpiece shapes and precision are recovered comprehensively, thus recover the original performance of workpiece.
Embodiment two:
Repair the water erosion defect at position, plane string water hole on engine cylinder block, upper plane string water hole is the finished surface on engine cylinder block, and on other finished surfaces, corresponding defect repair process is identical, and it comprises the steps:
(1) according to the shape of rejected region, select this rejected region surface of pneumatic grinding wheel trimmer reconditioning, remove these rejected region surface oxide layer, greasy dirt etc. and be unfavorable for the factor that in follow-up welding process, wlding is combined with cylinder block body, expose this cylinder block body;
(2) with the wedge angle on this cylinder block body of pneumatic grinding wheel trimmer reconditioning or seamed edge, make the wedge angle on this cylinder block body or seamed edge realize rounding off, avoid follow-up welding process to occur in conjunction with bad;
(3) rejected region after reconditioning is coated alcohol and is lighted, and removes the oil immersed in this cylinder block body;
(4) the reconditioning process of step (1), step (2) is repeated;
(5) rejected region after reconditioning smears alcohol, cleans this rejected region, avoids follow-up welding process to occur in conjunction with bad;
(6) gas breakdown is formed ion-gas by the high frequency voltage utilizing electric spark ion microbonding machine to produce, thus the electric spark produced up to 8000 ° of more than C, utilize electric spark by meltability anode under argon shield instant melting on this cylinder block body, complete metal accumulation, welding position and this cylinder block finished surface are maintained an equal level, realize defect Rapid-Repair, the nichrome of the preferred diameter 2mm of meltability anode, because the electric spark activity duration is short, be generally for 1 ~ 10 nanosecond, this cylinder block body does not generate heat, indeformable, not undercut, this cylinder block body and wlding are combined into metallurgical binding, bond strength is good,
(7) problem of pore defect may be there is to eliminate the microbonding of electric spark ion, with this welding position of diamond abrasive tool reconditioning, making this welding position 0.2mm lower than this cylinder block finished surface;
(8) heavy current pulse adopting pulse cold welding machine to produce flows through the faying face of workpiece and wlding instantaneously, make its rapid melted join, make this welding position than this cylinder block finished surface height 0.5mm, wlding preferred 0.2mm dilval thin slice, because pulse cold welding action time is short, dash current is large, heat effect district is minimum, make this cylinder block body without thermal deformation, be metallurgical binding between this cylinder block body and wlding, bond strength is high, the fine and close zero defect of wlding, after ensure that the processing process of follow-up welding position, exposed wlding dense structure zero defect, compensate for the issuable pore defect of electric spark ion microbonding, and repair tissue and color are close to body,
(9) adopt surface grinding machine to be milled to this welding position to maintain an equal level with this cylinder block finished surface, workpiece shapes and precision are recovered comprehensively, thus recover the original performance of workpiece.
Embodiment three:
Repair the water erosion defect in the water jacket blanking cover hole of engine cylinder block, water jacket blanking cover hole is the blank surface on engine cylinder block, and other blank surface corresponding defect repair process is identical, and it comprises the steps:
(1) according to the shape of rejected region, select wire wheel, pneumatic grinding wheel trimmer or other grinding tools be applicable to, this rejected region surface of reconditioning, remove these rejected region surface oxide layer, greasy dirt etc. and be unfavorable for the factor that in follow-up welding process, wlding is combined with cylinder block body, expose this cylinder block body;
(2) with wire wheel, pneumatic grinding wheel trimmer or other grinding tools be applicable to, the wedge angle on this cylinder block body of reconditioning or seamed edge, make the wedge angle on this cylinder block body or seamed edge realize rounding off, avoids follow-up welding sequence to occur in conjunction with bad;
(3) remove the oil of this rejected region, utilize combustion method to remove oil, this combustion method is for smearing combustible medium at this rejected region and lighting, and preferably, combustible medium comprises the alcohols such as alcohol;
(4) the reconditioning process of step (1), step (2) is repeated;
(5) clean this rejected region, preferably adopt alcohol washes, other cleaning fluids can certainly be adopted;
(6) gas breakdown is formed ion-gas by the high frequency voltage utilizing electric spark ion microbonding machine to produce, thus the electric spark produced up to 8000 ° of more than C, utilize electric spark by meltability anode under argon shield instant melting on this cylinder block body, complete metal accumulation, because the microbonding of electric spark ion may exist pore defect, but for the reparation of blank surface, without the need to eliminating pore defect, thus make welding position than this cylinder block blank surface height 0.3mm ~ 0.5mm, realize defect Rapid-Repair, the nichrome of the preferred diameter 2mm of meltability anode, because the electric spark activity duration is short, be generally for 1 ~ 10 nanosecond, this cylinder block body does not generate heat, indeformable, not undercut, wlding and this cylinder block body be combined into metallurgical binding, bond strength is good,
(7) adopt small-sized resin wheel this welding position reconditioning extremely to be maintained an equal level with this cylinder block blank surface, the shape of workpiece and precision are recovered comprehensively, thus recover the original performance of workpiece.
The restorative procedure of the engine cylinder block finished surface water erosion defect that the embodiment of the present invention provides, owing to having carried out reconditioning, oil removing, again reconditioning and cleaning step to rejected region before welding, make to be combined to wlding the factor that impacts with cylinder block body and the factor of welding stress may be caused all thoroughly to eliminate, the good combination of wlding and cylinder block body when effectively ensureing follow-up welding; Due to the microbonding of electric spark ion and pulse cold welding equal action time short, heat effect district is minimum, abundant guarantee cylinder block body is without thermal deformation, thus ensure the relative dimensions precision being repaired workpiece, the reasonable combination of electric spark ion microbonding simultaneously and pulse cold welding, for the reparation of water erosion defect, both improve efficiency, in turn ensure that dense structure's zero defect after repairing; After having welded, this welding position is milled to and has maintained an equal level with this cylinder block finished surface, workpiece shapes and precision are recovered comprehensively, thus recovered the original performance of workpiece, completed the reparation to engine cylinder block finished surface water erosion defect.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the restorative procedure of engine cylinder block finished surface water erosion defect, comprises the following steps implemented successively:
(1) reconditioning rejected region surface, exposes cylinder block body;
(2) wedge angle on cylinder block body described in reconditioning or seamed edge;
(3) oil of described rejected region is removed;
(4) the reconditioning process of step (1), step (2) is repeated;
(5) described rejected region is cleaned;
It is characterized in that, after step (5) completes, also comprise the following steps implemented successively:
(6) repair described rejected region with the microbonding of electric spark ion, the finished surface of welding position and described cylinder block is maintained an equal level;
(7) welding position described in reconditioning, makes described welding position lower than the finished surface of described cylinder block;
(8) repair described welding position with pulse cold welding, make described welding position higher than the finished surface of described cylinder block;
(9) described welding position is milled to maintains an equal level with the finished surface of described cylinder block.
2. the restorative procedure of engine cylinder block finished surface water erosion defect according to claim 1, is characterized in that, in step (3), utilizes combustion method to remove oil, and described combustion method is for smearing combustible medium at described rejected region and lighting.
3. the restorative procedure of engine cylinder block finished surface water erosion defect according to claim 2, is characterized in that, in step (7), and described welding position 0.1mm ~ 0.2mm lower than described cylinder block finished surface.
4. the restorative procedure of engine cylinder block finished surface water erosion defect according to claim 3, is characterized in that, in step (8), described welding position is than described cylinder block finished surface height 0.3mm ~ 0.5mm.
5. the restorative procedure of engine cylinder block finished surface water erosion defect according to claim 4, is characterized in that, in step (1) and step (2), adopt wire wheel or the reconditioning of pneumatic grinding wheel trimmer; Diamond abrasive tool reconditioning is adopted in step (7); Surface grinding machine grinding is adopted in step (9).
6. the restorative procedure of engine cylinder block finished surface water erosion defect according to claim 5, is characterized in that, the wlding of described electric spark ion microbonding is the nichrome of diameter 2mm; The wlding of described pulse cold welding is 0.1mm ~ 0.2mm dilval thin slice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310141168.XA CN103192226B (en) | 2013-04-22 | 2013-04-22 | Method for remedying water-eroded defects on finished surface of engine cylinder block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310141168.XA CN103192226B (en) | 2013-04-22 | 2013-04-22 | Method for remedying water-eroded defects on finished surface of engine cylinder block |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103192226A CN103192226A (en) | 2013-07-10 |
| CN103192226B true CN103192226B (en) | 2015-04-15 |
Family
ID=48715140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310141168.XA Active CN103192226B (en) | 2013-04-22 | 2013-04-22 | Method for remedying water-eroded defects on finished surface of engine cylinder block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103192226B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9382871B2 (en) * | 2014-01-30 | 2016-07-05 | Caterpillar Inc. | Method for repair of cylinder block including water ferrule |
| CN104439878A (en) * | 2014-10-20 | 2015-03-25 | 广东梅雁吉祥水电股份有限公司 | Method for repairing cavitation damaged face of turbine runner |
| CN108968637A (en) * | 2017-06-02 | 2018-12-11 | 九阳股份有限公司 | Cast the manufacturing method of cookware |
| CN109608232B (en) * | 2018-12-24 | 2021-08-31 | 云南云铝润鑫铝业有限公司 | Method for repairing ceramic layer on surface of internal guide type hydraulic oil cylinder |
| CN111215830A (en) * | 2019-12-02 | 2020-06-02 | 抚顺特殊钢股份有限公司 | Method for repairing cracks of high-pressure medium-carbon cast steel oil cylinder body with thickness larger than 200mm |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101444881A (en) * | 2008-11-11 | 2009-06-03 | 大连新重集团有限公司 | Technology for repairing surfacing of piston rod of super large marine diesel engine |
| CN101767261A (en) * | 2010-01-13 | 2010-07-07 | 西安热工研究院有限公司 | Process for repairing water erosion damage of flow passage component of steam turbine and protecting flow passage component of steam turbine |
| RU2420386C2 (en) * | 2009-07-14 | 2011-06-10 | Анатолий Алексеевич Зуев | Method of shaft recovery |
| CN102294568A (en) * | 2011-04-27 | 2011-12-28 | 武汉开明高新科技有限公司 | Process for repairing breakage of rotary kiln tyre/roller |
| CN103008966A (en) * | 2012-12-05 | 2013-04-03 | 中国海洋石油总公司 | Repairing method of scrapped mud pump cylinder sleeve |
-
2013
- 2013-04-22 CN CN201310141168.XA patent/CN103192226B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101444881A (en) * | 2008-11-11 | 2009-06-03 | 大连新重集团有限公司 | Technology for repairing surfacing of piston rod of super large marine diesel engine |
| RU2420386C2 (en) * | 2009-07-14 | 2011-06-10 | Анатолий Алексеевич Зуев | Method of shaft recovery |
| CN101767261A (en) * | 2010-01-13 | 2010-07-07 | 西安热工研究院有限公司 | Process for repairing water erosion damage of flow passage component of steam turbine and protecting flow passage component of steam turbine |
| CN102294568A (en) * | 2011-04-27 | 2011-12-28 | 武汉开明高新科技有限公司 | Process for repairing breakage of rotary kiln tyre/roller |
| CN103008966A (en) * | 2012-12-05 | 2013-04-03 | 中国海洋石油总公司 | Repairing method of scrapped mud pump cylinder sleeve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103192226A (en) | 2013-07-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103192226B (en) | Method for remedying water-eroded defects on finished surface of engine cylinder block | |
| CN102343474B (en) | Resistance spot welding of Al-Al, steel to steel | |
| CN103949757B (en) | Argon arc welding is adopted to repair the process of Titanium Alloy Aircraft slide rail pit | |
| CN103451650A (en) | Laser quick repair process method for large rotary machine bearing bush | |
| CN104786003A (en) | Method for repairing main bearing hole of body | |
| CN105904151A (en) | Thin-wall component recombining and restoring method based on pulse welding and laser augmented material restoring | |
| CN102950370A (en) | Submerged-arc welding process method for welding H-shaped steel with web plate more than 16mm thick | |
| CN109746453B (en) | Laser repair method and device | |
| CN111037098A (en) | Method for repairing various welding seam defects of laser welding of power battery sealing nail | |
| CN1166490C (en) | Method of repairing defect of metallic member using embedded mending welding | |
| CN104439770B (en) | Locomotive Engine Cylinder seal groove restorative procedure | |
| CN110125619A (en) | A kind of electron beam welding method for repairing and mending of the big I-shaped weldment of thickness titanium alloy | |
| CN103192227B (en) | The restorative procedure of engine cylinder block blank surface water erosion defect | |
| CN103286459B (en) | Large-scale PTA drying machine sealing surface abrasion on-site precise pulse surfacing welding repair process | |
| CN109371393A (en) | A kind of laser melting coating gear reconstruction restorative procedure | |
| CN110170796A (en) | A kind of melting welding renovation technique remanufacturing automotive wheel | |
| CN106346115A (en) | Method for repairing inside weld seam of U rib plate | |
| CN104741866A (en) | Method for repairing casting | |
| CN102476344A (en) | Polishing and grinding method of titanium alloy blades | |
| CN109175656A (en) | A kind of method that electron beam frit repairs high-strength steel defect | |
| CN112222782A (en) | Titanium and titanium alloy seal head processing technology | |
| CN113068434B (en) | Laser fusion welding repair method for aircraft landing gear piston rod | |
| CN114654383B (en) | Precise trimming method for concave arc metal bond diamond grinding wheel | |
| CN102744551A (en) | Method for compositely repairing half buried cracks in cold working mould | |
| CN109904284A (en) | A kind of method that component monolithic is reprocessed after lamination |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210317 Address after: 261061 Shandong city in Weifang province Fu hi tech Industrial Development Zone, East Street No. 197 Patentee after: Weichai Power Co.,Ltd. Address before: No. 197, Fushou East Street, high tech Development Zone, Weifang City, Shandong Province, 261061 Patentee before: WEICHAI POWER (WEIFANG) REMANUFACTURING Co.,Ltd. |
|
| TR01 | Transfer of patent right |