CN102430889B - 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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- CN102430889B CN102430889B CN 201110266499 CN201110266499A CN102430889B CN 102430889 B CN102430889 B CN 102430889B CN 201110266499 CN201110266499 CN 201110266499 CN 201110266499 A CN201110266499 A CN 201110266499A CN 102430889 B CN102430889 B CN 102430889B
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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 with the method for welding, be specially the restorative procedure that certain type machine engine crankcase flow splitter crackle falls piece.
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 procedure and fall the piece fault, if untimely discovery and repairing, engine may cause the major accidents such as engine surge in the work of outfield, the serious harm engine uses safety.For the flow splitter of being made by titanium alloy material, conventional repair method is to carry out repair welding in the vacuum drying oven of special use, and postwelding uses special fixture to heat-treat in heat-treatment furnace.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 purpose of this invention is to provide the restorative procedure that a kind of equipment investment is little, the cost of repairs is low, the repair cycle is short casing flow splitter crackle falls 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, can round and smoothly transfer, control polishing speed and polishing amount in bruting process, every polishing is placed cooling after one minute, repeat again polishing after temperature is down to room temperature, is grinding into square or rectangular breach (cooling the hocketing of polishing is for preventing the breach thermal deformation) until will fall the piece position;
(2) the breach periphery of air exercise milled carries out dyeing inspection, and flawless is qualified;
(3) manufacture sticking patch:
Adopt wire cutting method to intercept material from the casing corresponding site of scrapping, breach every limit that the intercepting area is better than the reconditioning of upper step goes out greatly 5mm, as patching material; Then with emery wheel, it is carried out reconditioning according to notch geometry, for preventing sticking patch overheating deforming in the reconditioning process, take little stock removal circumference to remove the method reconditioning, sticking patch and breach after repairing a die are matched;
(4) argon arc welding repair welding:
The sticking patch that above-mentioned reconditioning is good is placed in breach, supports sticking patch with bracing frame; First with the little electric current argon arc welding of 50A, sticking patch is positioned weldering, then carry out segmentation, be symmetrically welded, namely first carry out the welding on a limit for the square or rectangular weld seam, carry out the welding of opposite side after being soldered again, then same method is welded another two limits according to this;
(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, first impact technique sample is tested impact, the technique 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 axis of a weld each 10-15mm of both sides; Impacting number of times (impact head has impacted whole shock zone, and track is intensive, does not stay the dead angle for once) is no less than three times; During impact, impact head should be done the swing of certain angle and move around along bead direction on the direction vertical with weld seam, and translational speed is controlled at 300-500mm/min; Impact is take weld seam, weld seam both sides toe of weld as main, and then expands to weld seam periphery and heat affected area.
For controlling the welding oxidation, conventional titanium alloy welding is to carry out in vacuum drying oven.For realizing completing 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 is a kind of torch head of argon arc welding gun design that uses in above-mentioned restorative procedure.This torch head is made of circular housing and the retainer ring, copper mesh and the pressing plate that are arranged in this shell by screw thread, and copper mesh is placed between retainer ring and pressing plate, and in shell, hole length is greater than the gross thickness of retainer ring, copper mesh and pressing plate, and there is the gas outlet of expansion the shell front portion.
Fall space, piece place according to the casing flow splitter less, parts are interfered more characteristics mutually, and the present invention is also a kind of sticking patch bracing frame of sticking patch welding design in above-mentioned restorative procedure.This bracing frame is comprised 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 base, nut is arranged.During use, according to the welding requirements of different parts, can adjust the height of bracing frame by adjusting screw bolt and nut, make inclined-plane, bolt top be close to sticking patch, play a supporting role.
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, in figure: J-casing, F-flow splitter;
Fig. 2 is argon arc welding gun torch head cutaway view of the present invention, in figure: 1-shell, 2-retainer ring, 3 copper mesh, 4-pressing plate, 5-gas outlet;
Fig. 3 is the cutaway view of Fig. 2 housing;
Fig. 4 is the right view of Fig. 3;
Fig. 5 is retainer ring cutaway view in 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 sticking patch support frame structure schematic diagram of the present invention, in figure: 1 '-base, 2 '-bolt, 3 '-nut;
Figure 12 is the cutaway view of base in Figure 11;
Figure 13 is the top view of Figure 12.
The specific embodiment
The invention will be further described below in conjunction with embodiment.
The present embodiment is to be 93mm to being positioned at casing flow splitter lip one, place length, and width is the restorative procedure that 64mm falls piece, specifically repairs step and is:
(1) breach is repaired and polished with emery wheel, for preventing the breach thermal deformation, control polishing speed in bruting process not too fast, each polishing amount is not too much, every polishing is placed cooling after one minute, after being down to room temperature, temperature continues again to repeat polishing, the most at last the regular rectangle breach of breach reconditioning growth 100mm, wide 65mm;
(2) the breach periphery of air exercise milled carries out dyeing inspection, and flawless is qualified;
(3) manufacture sticking patch:
Adopt wire cutting method to cook sticking patch from the material that the casing corresponding site of scrapping intercepts long 110mm, wide 75mm; With emery wheel, it is carried out reconditioning according to the notch geometry that reconditioning is good, for preventing sticking patch overheating deforming in the reconditioning process, take little stock removal circumference to remove the method reconditioning, sticking patch appearance and size repairs a die into 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 is placed in breach, with bracing frame supporting sticking patch of the present invention; Change the torch head of argon arc welding gun into torch head of the present invention, first with the little electric current argon arc welding of 50A, sticking patch is positioned weldering, then a long limit is welded, weld again another long limit after being soldered this long limit, then according to the same manner, two minor faces are welded;
(5) welding position is carried out dyeing inspection, flawless and eyelet are qualified;
(6) ultrasonic wave is removed welding stress:
Manufacture ultrasonic impact technique sample, select HY2050 type small-power ultrasonic impact machine and fixing pancake impact head, first impact technique sample is tested impact, and the technique sample impacts by being 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; Then by this technological parameter, the sticking patch weld seam is impacted; Weld seam frontal impact peak width scope is apart from axis of a weld each 15mm of both sides; Impact three times; During impact, impact head is done 45 degree swings on the direction vertical with weld seam, moves around along bead direction, and translational speed is controlled at 500mm/min; Impact is take weld seam, weld seam both sides toe of weld as main, and then expands to weld seam periphery and heat affected area.
Through above step, make casing flow splitter lip director Crack obtain complete correction, use through reality, satisfy instructions for use fully.
Above-mentionedly fall the argon arc welding gun torch head that piece uses in repairing; as shown in Fig. 2-8; consisted of by circular housing 1 and the retainer ring 2, copper mesh 3 and the pressing plate 4 that are arranged in this shell by screw thread; copper mesh is placed between retainer ring and pressing plate; in shell, hole length is greater than the gross thickness of retainer ring, copper mesh and pressing plate; there is the gas outlet 5 of expansion the shell front portion; because this torch head gas outlet is larger than the gas outlet of conventional argon arc welding gun torch head (Fig. 9 and shown in Figure 10); the discharge capacity of argon gas and the protection domain of expansion argon gas are increased, improved the welding oxidation-protective effect.
Above-mentionedly fall the sticking patch bracing frame that piece uses in repairing, as shown in Figure 11-13, by base 1 ' with the bolt 2 that is connected with whorl of base ' form, the top of bolt is the inclined-plane, have between bolt top and base nut 3 '.During use, adjust the height of bracing frame by adjusting screw bolt and nut, make inclined-plane, bolt top be close to sticking patch, 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, can round and smoothly transfer, control polishing speed and polishing amount in bruting process, every polishing is placed cooling after one minute, repeat again polishing after temperature is down to room temperature, is grinding into the square or rectangular breach until will fall the piece position;
(2) the breach periphery of air exercise milled carries out dyeing inspection, and flawless is qualified;
(3) manufacture sticking patch:
Adopt wire cutting method to intercept material from the casing corresponding site of scrapping, breach every limit that the intercepting area is better than the reconditioning of upper step goes out greatly 5mm, as patching material; Then with emery wheel, it is carried out reconditioning according to notch geometry, for preventing sticking patch overheating deforming in the reconditioning process, take little stock removal circumference to remove the method reconditioning, sticking patch and breach after reconditioning are matched;
(4) argon arc welding repair welding:
The sticking patch that above-mentioned reconditioning is good is placed in breach, supports sticking patch with bracing frame; First with the little electric current argon arc welding of 50A, sticking patch is positioned weldering, then carry out segmentation, be symmetrically welded, namely first carry out the welding on a limit for the square or rectangular weld seam, carry out the welding of opposite side after being soldered again, then same method is welded another two limits according to this;
(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, first impact technique sample is tested impact, the technique 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 axis of a weld each 10-15mm of both sides; Impacting number of times is no less than three times; During impact, impact head should be done the swing of certain angle and move around along bead direction on the direction vertical with weld seam, and translational speed is controlled at 300-500mm/min; Impact is take weld seam, weld seam both sides toe of weld as main, and then expands to weld seam periphery and heat affected area.
2. casing flow splitter crackle as claimed in claim 1 falls the restorative procedure of piece, it is characterized in that, the welding gun torch head that described argon arc welding is adopted is by circular housing (1) and be arranged on retainer ring (2) in this shell, copper mesh (3) and pressing plate (4) by screw thread and consist of, copper mesh is placed between retainer ring and pressing plate, hole length is greater than the gross thickness of retainer ring, copper mesh and pressing plate in shell, and there is the gas outlet (5) of expansion the shell front portion.
3. casing flow splitter crackle as claimed in claim 1 falls the restorative procedure of piece, it is characterized in that, support frame as described above is comprised 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 base.
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| Application Number | Priority Date | Filing Date | Title |
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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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| 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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| CN102430889A CN102430889A (en) | 2012-05-02 |
| CN102430889B true CN102430889B (en) | 2013-06-26 |
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