CN102430889A - Method for repairing crack and chipping of shunt ring of case - Google Patents
Method for repairing crack and chipping of shunt ring of case Download PDFInfo
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- CN102430889A CN102430889A CN2011102664997A CN201110266499A CN102430889A CN 102430889 A CN102430889 A CN 102430889A CN 2011102664997 A CN2011102664997 A CN 2011102664997A CN 201110266499 A CN201110266499 A CN 201110266499A CN 102430889 A CN102430889 A CN 102430889A
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Abstract
The invention relates to a method for repairing a crack and a chipping a shunt ring of a case, which comprises the following steps of: (1) trimming and polishing the chipping part of the shunt ring to form a square or oblong notch by using an air drill and a grinding wheel; (2) performing dyeing inspection on the periphery of the polished notch, and determining as qualified if no crack exists; (3) taking a patch material from the corresponding portion of a discarded case by using a linear cutting method, trimming the patch material by using the grinding wheel according to the shape of the notch so that the trimmed patch is matched with the notch; (4) placing the trimmed patch in the notch, supporting the patch with a support frame, firstly performing positioning welding on the patch by using low current argon arc welding, and then performing sectional symmetry welding; (5) performing dyeing inspection on the welding portion, and determining as qualified if no crack or eyehole exists; and (6) eliminating welding stress by ultrasonic waves. The repairing method provided by the invention has the advantages of low equipment investment, low repairing expense and short repairing period.
Description
Technical field
The present invention relates to repair hardware, be specially the restorative procedure that certain type machine engine crankcase flow splitter crackle falls piece with the method for welding.
Background technology
Can run into casing flow splitter upper surface and flow splitter lip place's crackle and large tracts of land in certain type machine engine use and fall the piece fault; If untimely discovery and repairing; Engine possibly cause major accidents such as engine surge in the work of outfield, the serious harm engine is safe in utilization.For the flow splitter of being processed by titanium alloy material, conventional repair method is in the vacuum drying oven of special use, to carry out repair welding, and postwelding uses special fixture in heat-treatment furnace, to heat-treat.The shortcoming of this conventional repair method is that equipment funds have high input, and the cost of repairs is high, and repairing efficiency is long.
Summary of the invention
The casing flow splitter crackle of the purpose of this invention is to provide that a kind of equipment investment is little, the cost of repairs is low, the repair cycle is short falls the restorative procedure of piece.
Casing flow splitter crackle provided by the invention falls the restorative procedure of piece, carries out according to the following steps:
(1) trim the piece position:
With air drill and emery wheel flow splitter being fallen the piece position repairs and polishes; It can slick and slyly be transferred; Control polishing speed and polishing amount in the bruting process; Cooling is placed in every polishing after one minute, treat to repeat polishing again after temperature is reduced to room temperature, until falling piece position reconditioning quadrate or rectangle breach (it is for preventing the breach thermal deformation that the polishing cooling hockets);
(2) the breach periphery of polishing is carried out dyeing inspection, flawless is qualified;
(3) manufacture sticking patch:
Adopt wire cutting method intercepting material from the casing corresponding site of scrapping, the every limit of the breach that the intercepting area is better than the reconditioning of last step goes out 5mm greatly, as patching material; With emery wheel it is carried out reconditioning according to notch geometry then,, take little stock removal circumference to remove the method reconditioning, sticking patch and breach after repairing a die are matched for preventing sticking patch overheating deforming in the reconditioning process;
(4) argon arc welding repair welding:
The sticking patch that above-mentioned reconditioning is good places breach, supports sticking patch with bracing frame; Earlier sticking patch is positioned weldering with the little electric current argon arc welding of 50A; Carry out segmentation, symmetry welding then; Promptly carry out the welding on a limit for the square or rectangular weld seam earlier, carry out the welding of opposite side after having welded again, same according to this then method is welded other two limits;
(5) welding position is carried out dyeing inspection, flawless and eyelet are qualified;
(6) ultrasonic wave is removed welding stress:
The ultrasonic impact head of selecting lower-powered ultrasonic impact machine and adapting with the sticking patch weld seam; The impact that makes an experiment of elder generation's impact technology sample; The technology sample is through after the assay was approved, and the impact process parameter of this sample as the impact process parameter to the sticking patch weld seam, is impacted the sticking patch weld seam; Weld seam frontal impact peak width scope is apart from each 10-15mm of axis of a weld both sides; Impacting number of times (impact head has been impacted whole shock zone, and track is intensive, does not stay the dead angle for once) is no less than three times; Impact head should be done the swing of certain angle and moves around along bead direction during impact on the direction vertical with weld seam, and translational speed is controlled at 300-500mm/min; Impact is main with weld seam, weld seam both sides toe of weld, and then expands to weld seam periphery and heat affected area.
Be control welding oxidation, conventional titanium alloy welding is in vacuum drying oven, to carry out.For realizing accomplishing welding without vacuum drying oven, according to casing modular construction characteristics, consider that the outer czermak space of flow splitter and casing is less, for guaranteeing to be welded with enough argon shields, the present invention designs a kind of torch head for the argon arc welding welding gun that uses in the above-mentioned restorative procedure.This torch head is made up of circular housing and the retainer ring, copper mesh and the pressing plate that are installed in this shell through screw thread, and copper mesh places between retainer ring and the pressing plate, and hole length is greater than the gross thickness of retainer ring, copper mesh and pressing plate in the shell, and there is the gas outlet of expansion the shell front portion.
It is less to fall space, piece place according to the casing flow splitter, and parts are interfered more characteristics each other, and the present invention also is a kind of sticking patch bracing frame of sticking patch Welding Design in the above-mentioned restorative procedure.This bracing frame is made up of with the bolt that is connected with whorl of base base, and the top of bolt is inclined-plane (corresponding with the flow splitter inclined-plane), between bolt top and the base nut is arranged.During use,, can make inclined-plane, bolt top be close to sticking patch, play a supporting role through the height of adjustment screw bolt and nut adjustment bracing frame according to the welding requirements of different parts.
The invention has the beneficial effects as follows: need not purchase the required vacuum drying oven of conventional restorative procedure, special fixture and Equipment for Heating Processing, fund input is little, and rehabilitation expense is low; Compare with conventional restorative procedure, repair same crackle and fall piece, average repairing efficiency can shorten more than 1/3rd.
Description of drawings
Fig. 1 is the engine crankcase partial schematic diagram, among the figure: J-casing, F-flow splitter;
Fig. 2 is an argon arc welding welding gun torch head cutaway view of the present invention, among the figure: 1-shell, 2-retainer ring, 3 copper mesh, 4-pressing plate, 5-gas outlet;
Fig. 3 is the cutaway view of shell among Fig. 2;
Fig. 4 is the right view of Fig. 3;
Fig. 5 is a retainer ring cutaway view among Fig. 2;
Fig. 6 is the right view of Fig. 5;
Fig. 7 is the cutaway view of Fig. 2 center platen;
Fig. 8 is the left view of Fig. 7;
Fig. 9 is the cutaway view of conventional torch head;
Figure 10 is the left view of Fig. 9;
Figure 11 is a sticking patch support frame structure sketch map of the present invention, among the figure: 1 '-base, 2 '-bolt, 3 '-nut;
Figure 12 is the cutaway view of base among Figure 11;
Figure 13 is the vertical view of Figure 12.
The specific embodiment
Below in conjunction with embodiment the present invention is described further.
Present embodiment is to be 93mm to being positioned at the length in casing flow splitter lip place, and width is the restorative procedure that 64mm falls piece, specifically repairs step and is:
(1) with emery wheel breach is repaired and polished; For preventing the breach thermal deformation; Control polishing speed is not too fast in the bruting process, and each polishing amount is not too much, and cooling is placed in every polishing after one minute; Treat to continue to repeat polishing again after temperature is reduced to room temperature, the most at last breach reconditioning growth 100mm, the regular rectangle breach of wide 65mm;
(2) the breach periphery of polishing is carried out dyeing inspection, flawless is qualified;
(3) manufacture sticking patch:
Adopt wire cutting method to cook sticking patch from the long 110mm of casing corresponding site intercepting that scraps, the material of wide 75mm; Notch geometry according to reconditioning is good is carried out reconditioning with emery wheel to it, for preventing sticking patch overheating deforming in the reconditioning process, takes little stock removal circumference to remove the method reconditioning, and sticking patch appearance and size repairs a die and can match with notch size the most at last;
(4) argon arc welding repair welding:
The sticking patch that above-mentioned reconditioning is good places breach, with bracing frame supporting sticking patch of the present invention; Change the torch head of argon arc welding welding gun into torch head of the present invention; Earlier sticking patch is positioned weldering with the little electric current argon arc welding of 50A; Then a long limit is welded, weld another long limit again after having welded this long limit, according to the same manner two minor faces are welded then;
(5) welding position is carried out dyeing inspection, flawless and eyelet are qualified;
(6) ultrasonic wave is removed welding stress:
Manufacture ultrasonic impact technology sample; Select HY2050 type small-power ultrasonic impact machine and fixing pancake impact head; Impacts that make an experiment of elder generation's impact technology sample, technology sample are impacted after be up to the standards, and the impact process parameter that obtains this sticking patch weld seam is: impact amplitude no-load current 1.0A; Frequency of impact 20KHZ; By this technological parameter the sticking patch weld seam is impacted then; Weld seam frontal impact peak width scope is apart from each 15mm of axis of a weld both sides; Impact three times; Impact head is done 45 degree swings during impact on the direction vertical with weld seam, moves around along bead direction, and translational speed is controlled at 500mm/min; Impact is main with weld seam, weld seam both sides toe of weld, and then expands to weld seam periphery and heat affected area.
Through above step, make casing flow splitter lip director bar crackle obtain complete correction, use through actual, satisfy instructions for use fully.
Above-mentionedly fall the argon arc welding welding gun torch head that piece uses in repairing; Shown in Fig. 2-8; Be made up of circular housing 1 and the retainer ring 2, copper mesh 3 and the pressing plate 4 that are installed in this shell through screw thread, copper mesh places between retainer ring and the pressing plate, and hole length is greater than the gross thickness of retainer ring, copper mesh and pressing plate in the shell; There is the gas outlet 5 of expansion the shell front portion; Because this torch head gas outlet is bigger than the gas outlet of conventional argon arc welding welding gun torch head (Fig. 9 and shown in Figure 10), the discharge capacity of argon gas and the protection domain that enlarges argon gas are increased, improved the welding oxidation-protective effect.
Above-mentionedly fall the sticking patch bracing frame that piece uses in repairing, shown in Figure 11-13, by base 1 ' with the bolt that is connected with whorl of base 2 ' form, the top of bolt is the inclined-plane, have between bolt top and the base nut 3 '.During use, the height through adjustment screw bolt and nut adjustment bracing frame makes inclined-plane, bolt top be close to sticking patch, and sticking patch is played firm supporting role.
Claims (3)
1. a casing flow splitter crackle falls the restorative procedure of piece, it is characterized in that carrying out according to the following steps:
(1) trim the piece position:
With air drill and emery wheel flow splitter being fallen the piece position repairs and polishes; It can slick and slyly be transferred, control polishing speed and polishing amount in the bruting process, cooling is placed in every polishing after one minute; Treat to repeat polishing again after temperature is reduced to room temperature, until falling piece position reconditioning quadrate or rectangle breach;
(2) the breach periphery of polishing is carried out dyeing inspection, flawless is qualified;
(3) manufacture sticking patch:
Adopt wire cutting method intercepting material from the casing corresponding site of scrapping, the every limit of the breach that the intercepting area is better than the reconditioning of last step goes out 5mm greatly, as patching material; With emery wheel it is carried out reconditioning according to notch geometry then,, take little stock removal circumference to remove the method reconditioning, sticking patch and breach after repairing a die are matched for preventing sticking patch overheating deforming in the reconditioning process;
(4) argon arc welding repair welding:
The sticking patch that above-mentioned reconditioning is good places breach, supports sticking patch with bracing frame; Earlier sticking patch is positioned weldering with the little electric current argon arc welding of 50 A; Carry out segmentation, symmetry welding then; Promptly carry out the welding on a limit for the square or rectangular weld seam earlier, carry out the welding of opposite side after having welded again, same according to this then method is welded other two limits;
(5) welding position is carried out dyeing inspection, flawless and eyelet are qualified;
(6) ultrasonic wave is removed welding stress:
The ultrasonic impact head of selecting lower-powered ultrasonic impact machine and adapting with the sticking patch weld seam; The impact that makes an experiment of elder generation's impact technology sample; The technology sample is through after the assay was approved, and the impact process parameter of this sample as the impact process parameter to the sticking patch weld seam, is impacted the sticking patch weld seam; Weld seam frontal impact peak width scope is apart from each 10-15 mm of axis of a weld both sides; Impacting number of times is no less than three times; Impact head should be done the swing of certain angle and moves around along bead direction during impact on the direction vertical with weld seam, and translational speed is controlled at 300-500 mm/min; Impact is main with weld seam, weld seam both sides toe of weld, and then expands to weld seam periphery and heat affected area.
2. one kind is used for the argon arc welding welding gun torch head that the said casing flow splitter of claim 1 crackle falls the restorative procedure of piece; It is characterized in that; This torch head is installed in retainer ring (2), copper mesh (3) and pressing plate (4) formation in this shell by circular housing (1) with through screw thread; Copper mesh places between retainer ring and the pressing plate, and hole length is greater than the gross thickness of retainer ring, copper mesh and pressing plate in the shell, and there is the gas outlet (5) of expansion the shell front portion.
3. one kind is used for the sticking patch bracing frame that the said casing flow splitter of claim 1 crackle falls the restorative procedure of piece; It is characterized in that; This bracing frame is made up of with the bolt that is connected with whorl of base (2 ') base (1 '), and the top of bolt is the inclined-plane, and nut (3 ') is arranged between bolt top and the base.
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CN 201110266499 CN102430889B (en) | 2011-09-09 | 2011-09-09 | Method for repairing crack and chipping of shunt ring of case |
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