CA1039486A - Method of restoring worn or damaged drive shafts - Google Patents
Method of restoring worn or damaged drive shaftsInfo
- Publication number
- CA1039486A CA1039486A CA245,606A CA245606A CA1039486A CA 1039486 A CA1039486 A CA 1039486A CA 245606 A CA245606 A CA 245606A CA 1039486 A CA1039486 A CA 1039486A
- Authority
- CA
- Canada
- Prior art keywords
- shaft
- wire
- accordance
- metal
- welding gun
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K5/00—Gas flame welding
- B23K5/18—Gas flame welding for purposes other than joining parts, e.g. built-up welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/044—Built-up welding on three-dimensional surfaces
- B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
- B23K9/048—Built-up welding on three-dimensional surfaces on surfaces of revolution on cylindrical surfaces
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2220/00—Shaping
- F16C2220/24—Shaping by built-up welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2237/00—Repair or replacement
Abstract
TITLE "Method of restoring worn or damaged drive shafts".
ABSTRACT
A method of restoring worn bearing areas on a marine propeller shaft in which the area is cleaned and a wire compatible with the metal of the shaft is applied through an inert gas shielded arc welding gun, the wire being wound around the shaft by rotation thereof and fused to the shaft and adjacent turns during winding, the area being subsequently machined to produce a finished surface.
ABSTRACT
A method of restoring worn bearing areas on a marine propeller shaft in which the area is cleaned and a wire compatible with the metal of the shaft is applied through an inert gas shielded arc welding gun, the wire being wound around the shaft by rotation thereof and fused to the shaft and adjacent turns during winding, the area being subsequently machined to produce a finished surface.
Description
r~his in~vention relate~ to an improved method of restoring or recollditioning worn or damaged engineering equipment~ sueh as drive shafts, bearings and si~ilar equipment ~n the marine and general en~ineering fields and provides a method of restorin~ orr or damaged drive shafts or other components that have a circular form and to which repair can be carried out7 It is known to restore worn area~ o~ drive shaft by a metal praying process or flame plating but the repairs effected are eub~ec-t to disadvantagesO Ir. particular5 the deposited metal may not bo~d well to the ~haft and c,an therefore separate in use~ In addition metal spraying by its nature ie porous, which in marine en~ironments results in penetration of salt ~ater contributing to early separation and resulting damage to bearings. Electrolytic action or simply poor adhesion of the sprayed layer also contribute to failure. It has also been proposed to fuse wire~
by ~elding in the longitudir.al direction along the dal~aged are~
of the ~haft~ '~his method, howe~er~ ls not only time consuming and not readily adaptable to autol~atic processe~, but result3 in considerable bending distortion of the ehaft wrhicll can only be ~r .. .
1039~15 6 partly countered by laying uccessive wires on diametrically opposed lines on the shaft, thi~ considerably complicates the proces~. .
~ his invention seeks to provide a method which avoids the aforementioned disadvantages and which can be applied to restora-tion of shafts of all sizes.`
~ he object of thi~ invention is to provide a new method which can be xeadily applied in many fields for xestoration of ~orn or corroded area~ and which will be acceptable by various ~ o~anis~ s ID~ 4~ hnff~ as an approved proce3s.
According to this invention there i8 providea a method of restoring worn or damaged metal dr~ve shafts or li~e components, comprising O -(a) cleaning the area of the shaft or the like to be re~tored, (b) applying ~ wire of a metal compatible ~ith -the metal o~ the shaft by winding, using a controlled feed and tra~7erse9 (c) subjecting the area at the junction of the ~ire and shaft a~ ~inding progre~se~ to heat~ to weld or fuse the wire to adjacent turns and to the sha~t, and ~D (d) subsequen~ly màchining the weld depo~1t so formed to provide a ~ini~hed surface.
In a preferred example, the restoration of a marine drive shaft, the worn or damaged area or areas are cleaned -- chemically or mechanically 9 straightened, should this be nece~sary, and then a metal wire fed onto the revolving ~IL0394~6 shaft, localised heat being applied to the junction of wire and shaft to fuse both together and the said process being continued by traversing along the damaged area until spiral layers of deposited metal cover this area to a sufficient depth to subsequently re-machine the surface to its original size, or greater or smaller.
The applied wire is preferably~of the same or simi-lar metal composition to the sha~t although widely different metals can be applied~ subject to the ability to form an alloy with ~he shaft. The w~ld is wound onto the shaft by rotating the latter and feeding the welding wire thxough a gas or flux shielded welding gun positioned close to the shaft and moved longitudinally as the winding progresses. By this method a homogeneous build-up of metal integral with the original shaft metal is effected over the damaged area and by subsequent machining the surface may be refonned to the original dimen-sions and condition, or increased in diameter.
The method is particularly useful for remetalling worn bearing areas of a shaft or corroded areas of a shaft.
The rate of rotation of the shaft, wire diameter, type of wire, wox~ speed, current, shielding gas or gas mixtures or flux, gas flow, electrode traverse speedJ wire feed speed, voltage-work power scale, induction, electrode-pclarity, work-polarity, voltage regulation and e~uipment are related to the shaft diameter and welding process used.
The rotational speed of the work, its composition and wire 3L~394~6 size and composition, its feed rate and the r~lated vol~age and current of the electric arc, including the shielding gas or flux composition, are related and differ for each combina-tion of work, wire and composition. These interrelationships are complex and require experiment for optimum results. The parameters for speciic embodiments are given herein by way of examples.
The method may also be applied to the reconditioning of gunmetal or aluminum bronze or alloy bearing sleeves on marine propeller shafts. Hitherto such sleeves, when only slightly wor~, were machined off and a new sleeve machined and shrunk onto the shaft followed by machining and su~sequent truing of the shaft.
When the process is applied to propeller shafts or other marine components which have been subject to salt water a chemical de-salination process will be applied as part of the preliminary cleaning operation.
A continuous weld of metal identical, or compatible, with the shaft is fused around the worn or damaged area of the shaft by a circular motion instead of the more commonly used lateral welding methods which can cause distortion and other problems, or metal spraying which can be the subject of porosity difficulties and lack of body strength. The continu-ously fed wire coils are simultaneously welded to the shaft and to each other as a deposition of compatible weld metal, using an inert gas or flux shrouded electric welding process.
10394~
The voltage and current used ensures correct and even pene-tration to suit the particular shaft and weld material con-cerned. The process is continued until the deposit is suffi-cient to permit machining of the areas to the required dimensions. The laying-on of the weld is controlled by varying the traverse and spindle speed of the lathe or other machine being employed, such as a pipe rotating machine.
Stress relieving, or heat treatment, can be carried out on completion of the process if necessary~ but one advan-tage of the process is that in the majority of casss it isself-~ormalising and if the welding process is back-tracked to a suitable finishing point to allow for heat dissipation, it is unlikely that any surface cracking will occur.
It is not always neeessary to machine the surface or prepare it by methods such as shot ~lasting, as the process can be applied to any clean surface.
Dissimilar metal~ may be used, for example stainless steel can be applied to mild steel and aluminum bronze to stainless steel, mild steel and bronze materials. Nickel-aluminum bronze also can be applied in cases where a harderwearing surfa~e is desired.
Surface hardness can be maintained by using an appropriate metal, or subsequent heat treatment.
The method o~ the invention proves to be faster than known processes such as metal spraying and flame plating and is less liable to produce distortion in the shaft or affe~t ~39~86 the composition o~ the parent metal at lower levels.
A modification provides for the resurfacing of a flat surface by laying-on the wire in a helix across the surface and a further modification provides for internal appli-cation of the wire to the inside surface of a cylinder where sufficient space is available to receive the welding gun.
In practice repair of worn shafts or the like is carried out by rotating the shaft in a lathe, or similar machine, which is capable of rotation at an accurately con-trolled gpeed. The speed may be as low as 0.2 r.p.m. depend-ing on diameter of the shaft and rate of metal deposition.
Further the rate of traverse of the welding head across the area of the shaft being restored is variable and accurately controlled in relation to the rotational speed by means of an independent variable speed motor controlled from a variable potentiometer.
Existing machines may be easily modified to carry out the method of the invention with particular attention being given to protection of the machine slideways from weld splatter and the method of current feed to the shaft, Because of the high direct currents employed, feeding through the machine bearings is generally unsatisfactory as the high current densities and attendant arcing destroys ~he bearing surfaces in the machine and leads to variations in weld current.
This problem is overcome by fitting the machine with motor brushgear contacting the machine spindle or a contact sleeve ~3~48Çi thereon, or a brushgear band strapped to the workpiece to complete the circuit.
As example a two inch diameter stainless steel shaft was rotated at four r.p.m. and a 0.8 m.m. stainless steel wire was fused to the shaft and fed through a low voltage shiPlded argon arc. The area of the shaft was then turned and ground to the final dimensions. This type of work can be carried out in accordance with predetermined data thereby minimising the heat input and reducing any detrimental effects to the parent metal or deposited weld.
Conventional repairs using metal spraying may f~il due to the p0~0sity of the repair allowing salt water penetra tion and subsequent separation of the metal layers. This is avoided with the method of the invention.
With marine propeller shafts a chemical de-salting process is effected as a preliminary step.
The accompanying drawing shows one arrangement for carrying out the method of the invention using a conventional lathe. As shown the shaft 1 to be restored is mounted for rot~tion by the machine headstock drive 2 in steadying bearings 3 and 4. The lathe saddle 5 carries the arc welding equipment 6 with feeds for shielding gas and wire 7. An adjustment 8 provides for variation of the height of the welding eguipment.
The saddle 5 also carries a cutting tool and mounting 9.
The following examples taken in conjunction with the table illustrate the various parameters for a number of 3~486 combinations and dimension of shafts and wire.
In the examples the welding equipment used was by Norman Butter and Company Limited designated ~BC 350 or NBC
500 being 350 amp and 500 amp respectively and the parameter "wire feed speed" is the dial reading on this equipment. In all examples the polarity was, welding electrode-positive, and workpiece-negative. Other sizes of different diameters can be calculated from the data presented in order to achieve satisfactory results. A wire brush is used on the opposite side to the:~weld gun on the workpiece to remove possible splatter which cou~ cause pin points of porosity especially when subsequent layers are being applied. A constant voltage is to be ma.intained in all cases.
~¢J 3~ 6 Example Shaft Wire Weld Equipment 1 Stainless Steel ENl8C Aluminium Bronze NBC350 BS2901 Part 3
by ~elding in the longitudir.al direction along the dal~aged are~
of the ~haft~ '~his method, howe~er~ ls not only time consuming and not readily adaptable to autol~atic processe~, but result3 in considerable bending distortion of the ehaft wrhicll can only be ~r .. .
1039~15 6 partly countered by laying uccessive wires on diametrically opposed lines on the shaft, thi~ considerably complicates the proces~. .
~ his invention seeks to provide a method which avoids the aforementioned disadvantages and which can be applied to restora-tion of shafts of all sizes.`
~ he object of thi~ invention is to provide a new method which can be xeadily applied in many fields for xestoration of ~orn or corroded area~ and which will be acceptable by various ~ o~anis~ s ID~ 4~ hnff~ as an approved proce3s.
According to this invention there i8 providea a method of restoring worn or damaged metal dr~ve shafts or li~e components, comprising O -(a) cleaning the area of the shaft or the like to be re~tored, (b) applying ~ wire of a metal compatible ~ith -the metal o~ the shaft by winding, using a controlled feed and tra~7erse9 (c) subjecting the area at the junction of the ~ire and shaft a~ ~inding progre~se~ to heat~ to weld or fuse the wire to adjacent turns and to the sha~t, and ~D (d) subsequen~ly màchining the weld depo~1t so formed to provide a ~ini~hed surface.
In a preferred example, the restoration of a marine drive shaft, the worn or damaged area or areas are cleaned -- chemically or mechanically 9 straightened, should this be nece~sary, and then a metal wire fed onto the revolving ~IL0394~6 shaft, localised heat being applied to the junction of wire and shaft to fuse both together and the said process being continued by traversing along the damaged area until spiral layers of deposited metal cover this area to a sufficient depth to subsequently re-machine the surface to its original size, or greater or smaller.
The applied wire is preferably~of the same or simi-lar metal composition to the sha~t although widely different metals can be applied~ subject to the ability to form an alloy with ~he shaft. The w~ld is wound onto the shaft by rotating the latter and feeding the welding wire thxough a gas or flux shielded welding gun positioned close to the shaft and moved longitudinally as the winding progresses. By this method a homogeneous build-up of metal integral with the original shaft metal is effected over the damaged area and by subsequent machining the surface may be refonned to the original dimen-sions and condition, or increased in diameter.
The method is particularly useful for remetalling worn bearing areas of a shaft or corroded areas of a shaft.
The rate of rotation of the shaft, wire diameter, type of wire, wox~ speed, current, shielding gas or gas mixtures or flux, gas flow, electrode traverse speedJ wire feed speed, voltage-work power scale, induction, electrode-pclarity, work-polarity, voltage regulation and e~uipment are related to the shaft diameter and welding process used.
The rotational speed of the work, its composition and wire 3L~394~6 size and composition, its feed rate and the r~lated vol~age and current of the electric arc, including the shielding gas or flux composition, are related and differ for each combina-tion of work, wire and composition. These interrelationships are complex and require experiment for optimum results. The parameters for speciic embodiments are given herein by way of examples.
The method may also be applied to the reconditioning of gunmetal or aluminum bronze or alloy bearing sleeves on marine propeller shafts. Hitherto such sleeves, when only slightly wor~, were machined off and a new sleeve machined and shrunk onto the shaft followed by machining and su~sequent truing of the shaft.
When the process is applied to propeller shafts or other marine components which have been subject to salt water a chemical de-salination process will be applied as part of the preliminary cleaning operation.
A continuous weld of metal identical, or compatible, with the shaft is fused around the worn or damaged area of the shaft by a circular motion instead of the more commonly used lateral welding methods which can cause distortion and other problems, or metal spraying which can be the subject of porosity difficulties and lack of body strength. The continu-ously fed wire coils are simultaneously welded to the shaft and to each other as a deposition of compatible weld metal, using an inert gas or flux shrouded electric welding process.
10394~
The voltage and current used ensures correct and even pene-tration to suit the particular shaft and weld material con-cerned. The process is continued until the deposit is suffi-cient to permit machining of the areas to the required dimensions. The laying-on of the weld is controlled by varying the traverse and spindle speed of the lathe or other machine being employed, such as a pipe rotating machine.
Stress relieving, or heat treatment, can be carried out on completion of the process if necessary~ but one advan-tage of the process is that in the majority of casss it isself-~ormalising and if the welding process is back-tracked to a suitable finishing point to allow for heat dissipation, it is unlikely that any surface cracking will occur.
It is not always neeessary to machine the surface or prepare it by methods such as shot ~lasting, as the process can be applied to any clean surface.
Dissimilar metal~ may be used, for example stainless steel can be applied to mild steel and aluminum bronze to stainless steel, mild steel and bronze materials. Nickel-aluminum bronze also can be applied in cases where a harderwearing surfa~e is desired.
Surface hardness can be maintained by using an appropriate metal, or subsequent heat treatment.
The method o~ the invention proves to be faster than known processes such as metal spraying and flame plating and is less liable to produce distortion in the shaft or affe~t ~39~86 the composition o~ the parent metal at lower levels.
A modification provides for the resurfacing of a flat surface by laying-on the wire in a helix across the surface and a further modification provides for internal appli-cation of the wire to the inside surface of a cylinder where sufficient space is available to receive the welding gun.
In practice repair of worn shafts or the like is carried out by rotating the shaft in a lathe, or similar machine, which is capable of rotation at an accurately con-trolled gpeed. The speed may be as low as 0.2 r.p.m. depend-ing on diameter of the shaft and rate of metal deposition.
Further the rate of traverse of the welding head across the area of the shaft being restored is variable and accurately controlled in relation to the rotational speed by means of an independent variable speed motor controlled from a variable potentiometer.
Existing machines may be easily modified to carry out the method of the invention with particular attention being given to protection of the machine slideways from weld splatter and the method of current feed to the shaft, Because of the high direct currents employed, feeding through the machine bearings is generally unsatisfactory as the high current densities and attendant arcing destroys ~he bearing surfaces in the machine and leads to variations in weld current.
This problem is overcome by fitting the machine with motor brushgear contacting the machine spindle or a contact sleeve ~3~48Çi thereon, or a brushgear band strapped to the workpiece to complete the circuit.
As example a two inch diameter stainless steel shaft was rotated at four r.p.m. and a 0.8 m.m. stainless steel wire was fused to the shaft and fed through a low voltage shiPlded argon arc. The area of the shaft was then turned and ground to the final dimensions. This type of work can be carried out in accordance with predetermined data thereby minimising the heat input and reducing any detrimental effects to the parent metal or deposited weld.
Conventional repairs using metal spraying may f~il due to the p0~0sity of the repair allowing salt water penetra tion and subsequent separation of the metal layers. This is avoided with the method of the invention.
With marine propeller shafts a chemical de-salting process is effected as a preliminary step.
The accompanying drawing shows one arrangement for carrying out the method of the invention using a conventional lathe. As shown the shaft 1 to be restored is mounted for rot~tion by the machine headstock drive 2 in steadying bearings 3 and 4. The lathe saddle 5 carries the arc welding equipment 6 with feeds for shielding gas and wire 7. An adjustment 8 provides for variation of the height of the welding eguipment.
The saddle 5 also carries a cutting tool and mounting 9.
The following examples taken in conjunction with the table illustrate the various parameters for a number of 3~486 combinations and dimension of shafts and wire.
In the examples the welding equipment used was by Norman Butter and Company Limited designated ~BC 350 or NBC
500 being 350 amp and 500 amp respectively and the parameter "wire feed speed" is the dial reading on this equipment. In all examples the polarity was, welding electrode-positive, and workpiece-negative. Other sizes of different diameters can be calculated from the data presented in order to achieve satisfactory results. A wire brush is used on the opposite side to the:~weld gun on the workpiece to remove possible splatter which cou~ cause pin points of porosity especially when subsequent layers are being applied. A constant voltage is to be ma.intained in all cases.
~¢J 3~ 6 Example Shaft Wire Weld Equipment 1 Stainless Steel ENl8C Aluminium Bronze NBC350 BS2901 Part 3
2 Aluminium Bronze " NBC500
3 Aluminium Bronze
4 Monel K500 Monel 60 NBC350 " " NBC500 6 Stainless Steel EN18C Stainless 29/9R NBC350 BS2901 Part 2 7 Stainless Steel EN58J Inconel 625 NBC500 8 ll ~, "
9 Gun Metal BS1400 Phosnic NBC350 (Ni 1.38:Nn 0.22:
Si 0.46: P 0.021:
Sn 5.22:
Balance CU) Gun Netal BS1400 Phosnic NBC500 ll Gun Metal, Admiralty Phosnic N "
Spec. DGS 203 or LG4 12 Mild Steel EN3C PZ.6000 BS 2901 NBC350 Part 1, Al 6 13 Mild Steel EN3B
14 Mild Steel EN3C " NBC500 EN5K C:0.25-0.35 PZ.S000 C:0.25-0.3 "
Si:0.05-0.35 Si 0.3-0.5 Mn:0.6-1.0 MN:1.3-1.6 S:0.05 P:0.05 S:0.04 P:0.04 16 Mild Steel EN3L PZ.6000 BS 2901 "
Part 1 Al 6 17 "
18 EN5K PZ.6000 ~' _ ~ _ ------ n ----~
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TA13LE 2. 1~39486 __ _ ~ ~
E~MPLE: NO. S~TTING ON SPECIFI~D EQUIPMENT
. _ __ Cour~e Vol~ e Power Fine Induc~ance Scal~ Voltag~ Con~x~l ~. _ . _ _ _ _ . _ . D LOW Q . 100 2 ~ LOW 5 100 4 D I.OW 4 100 6 D . LO~ 4 100 7 C I~oryJ 5-6 605 9 D LOW 4~5 O
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9 Gun Metal BS1400 Phosnic NBC350 (Ni 1.38:Nn 0.22:
Si 0.46: P 0.021:
Sn 5.22:
Balance CU) Gun Netal BS1400 Phosnic NBC500 ll Gun Metal, Admiralty Phosnic N "
Spec. DGS 203 or LG4 12 Mild Steel EN3C PZ.6000 BS 2901 NBC350 Part 1, Al 6 13 Mild Steel EN3B
14 Mild Steel EN3C " NBC500 EN5K C:0.25-0.35 PZ.S000 C:0.25-0.3 "
Si:0.05-0.35 Si 0.3-0.5 Mn:0.6-1.0 MN:1.3-1.6 S:0.05 P:0.05 S:0.04 P:0.04 16 Mild Steel EN3L PZ.6000 BS 2901 "
Part 1 Al 6 17 "
18 EN5K PZ.6000 ~' _ ~ _ ------ n ----~
~L~3~41~6 c ~ ~ ~ c~ _ z a ~ x n 7; ~ P ~
~ r~ C/~ ~o~ ~t It ~ ~ C~ 1_ ~3 rt 1 - fDrD O (D ~ ~- C1 ID D
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. -~
TA13LE 2. 1~39486 __ _ ~ ~
E~MPLE: NO. S~TTING ON SPECIFI~D EQUIPMENT
. _ __ Cour~e Vol~ e Power Fine Induc~ance Scal~ Voltag~ Con~x~l ~. _ . _ _ _ _ . _ . D LOW Q . 100 2 ~ LOW 5 100 4 D I.OW 4 100 6 D . LO~ 4 100 7 C I~oryJ 5-6 605 9 D LOW 4~5 O
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12 :1) LOW 4 100 13 D I,OW 4 100 14 C LOW 5 6 6i~5 17 . LOW 3 70 18 _ HIGH 1 7 0 , .
.
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Claims (13)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method of restoring worn or damaged drive shafts, especially marine propeller shafts, or other components by application of wire to the damaged area and fusion of the wire to the shaft by welding, characterized by the steps:
(a) cleaning by exposing the base metal in the area of the shaft or the like to be restored by chemical or mechanical means, (b) rotating the shaft about its longitudinal axis, (c) feeding through an arc welding gun to the periphery of the rotating shaft a single wire of a metal compatible with the metal of the shaft, (d) moving the welding gun longitudinally of the shaft while feeding said single wire therethrough and depositing the material of the wire over the length of the damaged area in the form of a metal layer comprising a single continuous helical track of the wire material, all while controlling the feed of the wire and maintaining a steady/ continuous traverse of the welding gun, (e) applying current to the wire and shaft to subject the area at the junction of the wire and shaft as feeding and winding progresses, to locally apply heat to fusion weld or fuse the material of the wire to both the adjacent turns formed of the wire material and to the shaft to provide a homogeneous substantially uniform metal deposit thereon, and (f) subsequently machining the weld deposit comprising the fused single continuous winding track to provide a finished surface.
(a) cleaning by exposing the base metal in the area of the shaft or the like to be restored by chemical or mechanical means, (b) rotating the shaft about its longitudinal axis, (c) feeding through an arc welding gun to the periphery of the rotating shaft a single wire of a metal compatible with the metal of the shaft, (d) moving the welding gun longitudinally of the shaft while feeding said single wire therethrough and depositing the material of the wire over the length of the damaged area in the form of a metal layer comprising a single continuous helical track of the wire material, all while controlling the feed of the wire and maintaining a steady/ continuous traverse of the welding gun, (e) applying current to the wire and shaft to subject the area at the junction of the wire and shaft as feeding and winding progresses, to locally apply heat to fusion weld or fuse the material of the wire to both the adjacent turns formed of the wire material and to the shaft to provide a homogeneous substantially uniform metal deposit thereon, and (f) subsequently machining the weld deposit comprising the fused single continuous winding track to provide a finished surface.
2. A method in accordance with claim 1, wherein the wire is of the same material as the shaft.
3. A method in accordance with claim 1 or 2, wherein the shaft is rotated and wire wound thereon from a carrier movable along the shaft as the winding traverses.
4. A method in accordance with claim 1, wherein the wire is fed through the welding gun positioned close to the shaft and movable therealong as the winding progresses.
5. A method in accordance with claim 4, wherein the welding gun is gas or flux shielded.
6. A method in accordance with claim 4, wherein the electrical current is supplied through brushgear associated with the shaft.
7. A method according to claim 1, including the step of welding the wire to the shaft and to adjacent wound turns by arc deposition of a compatible weld metal using an electric welding process.
8. A method according to claim lo wherein the cleaning includes a de-salination process.
9. A modification of the method according to claim 1, wherein the wire is applied as a helix to a flat surface.
10. A modification of the method according to claim 1, wherein the wire is applied to the internal surface of a cylinder.
11. A method in accordance with claim 1, wherein the wire size is substantially within the range of .08 - 1.6mm diameter.
12. A method in accordance with claim 1, wherein the traverse is substantially in the range 0.09 - 0.20 inches per shaft revolution.
13. A method in accordance with claim 1, wherein the shaft diameter is substantially within the range of 1.5 - 10 inches.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB6163/75A GB1543733A (en) | 1975-02-13 | 1975-02-13 | Method of restoring worn or damaged marine propeller shafts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1039486A true CA1039486A (en) | 1978-10-03 |
Family
ID=9809573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA245,606A Expired CA1039486A (en) | 1975-02-13 | 1976-02-12 | Method of restoring worn or damaged drive shafts |
Country Status (24)
| Country | Link |
|---|---|
| JP (1) | JPS51105954A (en) |
| AU (1) | AU504321B2 (en) |
| BE (1) | BE838568A (en) |
| CA (1) | CA1039486A (en) |
| DE (1) | DE2605841A1 (en) |
| DK (1) | DK145074C (en) |
| ES (1) | ES445104A1 (en) |
| FI (1) | FI68544B (en) |
| FR (1) | FR2300652A1 (en) |
| GB (1) | GB1543733A (en) |
| GR (1) | GR59265B (en) |
| HK (1) | HK55281A (en) |
| IE (1) | IE43211B1 (en) |
| IL (1) | IL49018A (en) |
| IN (1) | IN158121B (en) |
| IT (1) | IT1059398B (en) |
| MT (1) | MTP795B (en) |
| MY (1) | MY8400074A (en) |
| NL (1) | NL7601503A (en) |
| NO (1) | NO760449L (en) |
| PT (1) | PT64791B (en) |
| SE (1) | SE424607B (en) |
| YU (1) | YU34976A (en) |
| ZA (1) | ZA76726B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113385819A (en) * | 2021-04-28 | 2021-09-14 | 西安交通大学 | Metal additive manufacturing system and method |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5516744A (en) * | 1978-07-21 | 1980-02-05 | Fuji Electric Co Ltd | 12% chrome steel turbine rotor |
| DE3038708A1 (en) * | 1980-10-14 | 1982-06-16 | Thyssen AG vorm. August Thyssen-Hütte, 4100 Duisburg | DEVICE FOR PRODUCING CYLINDRICAL WORKPIECES OF LARGE DIMENSIONS |
| DE3208146A1 (en) * | 1982-03-06 | 1983-09-08 | Peter 6951 Schefflenz Füwesi | METHOD AND DEVICE FOR REPAIRING IRON BOLT BEARINGS |
| DE3228470A1 (en) * | 1982-07-30 | 1984-02-09 | Peter 6951 Schefflenz Füwesi | TOOL FOR REPAIRING WHEELED INTERIORS ON IRON PARTS |
| GB2132536B (en) * | 1982-12-09 | 1986-07-16 | Boc Group Plc | Shielding gas for arc welding |
| GB8520910D0 (en) * | 1985-08-21 | 1985-09-25 | Carmichael C C | Surface treatment of metal components |
| FR2619734A1 (en) * | 1987-08-26 | 1989-03-03 | Uralsky Politekhn Inst | Method for reconditioning the surfaces of steel articles |
| IL84215A (en) * | 1987-10-19 | 1990-07-12 | Zeev Stahl | Screw-thread repair tool |
| US5085363A (en) * | 1990-11-01 | 1992-02-04 | Westinghouse Electric Corp. | Method of weld repairing of a section of a metallic cylindrical member |
| US5298710A (en) * | 1992-03-24 | 1994-03-29 | Bortech Corporation | Large bore welding apparatus |
| AT410643B (en) * | 2001-07-25 | 2003-06-25 | Mce Voest Gmbh & Co | METHOD AND DEVICE FOR MACHINING A, PREFERABLY METALLIC, WORKPIECE |
| US20070253858A1 (en) * | 2006-04-28 | 2007-11-01 | Maher Ababneh | Copper multicomponent alloy and its use |
| RU2455141C2 (en) * | 2010-04-05 | 2012-07-10 | Открытое акционерное общество холдинговая компания "Коломенский завод" | Method of reconditioning large-size nitride-hardened crankshaft scored hollow journals by high-frequency current |
| CN106695241B (en) * | 2016-12-30 | 2020-04-07 | 中国第一汽车股份有限公司 | Method for repairing inner taper hole of main shaft of machining center |
| RU2675868C1 (en) * | 2017-12-04 | 2018-12-25 | Владимир Иванович Ищенко | Method of repairing the strengthened by induction hardening crankshafts of internal combustion engines |
| RU2673900C1 (en) * | 2017-12-26 | 2018-12-03 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Тверской государственный технический университет" | Method of repairing strengthened by induction hardening crankshafts of internal combustion engines |
| CN109648173A (en) * | 2019-02-02 | 2019-04-19 | 焦维光 | Axis and hole wear surface repair apparatus |
| CN110340619A (en) * | 2019-07-17 | 2019-10-18 | 攀钢集团钛业有限责任公司 | Stainless steel bell crack restorative procedure |
| CN111889957A (en) * | 2020-07-16 | 2020-11-06 | 付锐 | Device for repairing shaft |
| DE102020120861A1 (en) | 2020-08-07 | 2022-02-10 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Process for creating a layer, manufacturing system and component |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2330289A (en) * | 1941-10-18 | 1943-09-28 | Linde Air Prod Co | Method of building up surfaces |
| US3075067A (en) * | 1961-03-30 | 1963-01-22 | Ivey W Axhelm | Build-up and hard surfacing machine |
| US3679858A (en) * | 1971-03-17 | 1972-07-25 | Detroit Flame Hardening Co | Method forming clad plates from curved surfaces |
| US3860780A (en) * | 1973-09-24 | 1975-01-14 | Dynaloc Corp | Method of making self-centering pulley using mig welding |
-
1975
- 1975-02-13 GB GB6163/75A patent/GB1543733A/en not_active Expired
-
1976
- 1976-02-09 ZA ZA726A patent/ZA76726B/en unknown
- 1976-02-10 SE SE7601459A patent/SE424607B/en not_active IP Right Cessation
- 1976-02-10 GR GR50012A patent/GR59265B/en unknown
- 1976-02-11 AU AU10997/76A patent/AU504321B2/en not_active Expired
- 1976-02-11 IN IN252/CAL/76A patent/IN158121B/en unknown
- 1976-02-11 MT MT795A patent/MTP795B/en unknown
- 1976-02-11 IL IL4901876A patent/IL49018A/en unknown
- 1976-02-11 IE IE270/76A patent/IE43211B1/en unknown
- 1976-02-11 DK DK54876A patent/DK145074C/en not_active IP Right Cessation
- 1976-02-12 FI FI760353A patent/FI68544B/en not_active Application Discontinuation
- 1976-02-12 CA CA245,606A patent/CA1039486A/en not_active Expired
- 1976-02-12 NO NO760449A patent/NO760449L/no unknown
- 1976-02-12 IT IT8331576A patent/IT1059398B/en active
- 1976-02-12 PT PT6479176A patent/PT64791B/en unknown
- 1976-02-12 ES ES445104A patent/ES445104A1/en not_active Expired
- 1976-02-13 YU YU34976A patent/YU34976A/en unknown
- 1976-02-13 DE DE19762605841 patent/DE2605841A1/en not_active Ceased
- 1976-02-13 NL NL7601503A patent/NL7601503A/en active Search and Examination
- 1976-02-13 BE BE164324A patent/BE838568A/en not_active IP Right Cessation
- 1976-02-13 FR FR7603941A patent/FR2300652A1/en active Granted
- 1976-02-13 JP JP1410376A patent/JPS51105954A/ja active Pending
-
1981
- 1981-11-12 HK HK55281A patent/HK55281A/en unknown
-
1984
- 1984-12-30 MY MY74/84A patent/MY8400074A/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113385819A (en) * | 2021-04-28 | 2021-09-14 | 西安交通大学 | Metal additive manufacturing system and method |
| CN113385819B (en) * | 2021-04-28 | 2022-08-09 | 西安交通大学 | Metal additive manufacturing system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| IL49018A0 (en) | 1976-04-30 |
| NO760449L (en) | 1976-08-16 |
| DE2605841A1 (en) | 1976-08-19 |
| DK54876A (en) | 1976-08-14 |
| IE43211B1 (en) | 1981-01-14 |
| MTP795B (en) | 1977-04-07 |
| PT64791A (en) | 1976-03-01 |
| IT1059398B (en) | 1982-05-31 |
| FR2300652A1 (en) | 1976-09-10 |
| SE7601459L (en) | 1976-08-16 |
| NL7601503A (en) | 1976-08-17 |
| SE424607B (en) | 1982-08-02 |
| YU34976A (en) | 1982-06-30 |
| BE838568A (en) | 1976-08-13 |
| AU504321B2 (en) | 1979-10-11 |
| FI760353A (en) | 1976-08-14 |
| PT64791B (en) | 1977-08-16 |
| MY8400074A (en) | 1984-12-31 |
| DK145074B (en) | 1982-08-23 |
| IN158121B (en) | 1986-09-13 |
| ES445104A1 (en) | 1977-05-16 |
| AU1099776A (en) | 1977-08-18 |
| ZA76726B (en) | 1977-01-26 |
| FI68544B (en) | 1985-06-28 |
| HK55281A (en) | 1981-11-20 |
| GB1543733A (en) | 1979-04-04 |
| IE43211L (en) | 1976-08-13 |
| IL49018A (en) | 1984-01-31 |
| GR59265B (en) | 1977-12-05 |
| JPS51105954A (en) | 1976-09-20 |
| DK145074C (en) | 1983-09-26 |
| FR2300652B1 (en) | 1982-09-17 |
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