CN113084448B - Rapid repairing method for rocket sled sliding rail fastener - Google Patents
Rapid repairing method for rocket sled sliding rail fastener Download PDFInfo
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- CN113084448B CN113084448B CN202110406636.6A CN202110406636A CN113084448B CN 113084448 B CN113084448 B CN 113084448B CN 202110406636 A CN202110406636 A CN 202110406636A CN 113084448 B CN113084448 B CN 113084448B
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- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
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- B23P6/04—Repairing fractures or cracked metal parts or products, e.g. castings
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Abstract
The invention relates to a method for quickly repairing a rocket sled sliding rail fastener, which comprises the following steps: s01: determining a bolt fracture position; s02: cutting off damaged bolts pre-embedded in the C plate from the upper surface of the C plate; s03: positioning the bolt to be replaced in a base; s04: welding the base on the C plate; s05: and knocking off the welding slag, checking whether an unwelded state exists, and returning to S04 if the unwelded state exists. The application provides a quick repairing method for a rocket sled sliding rail fastener, which can quickly repair a damaged bolt fastener and greatly reduce the maintenance cost of a rocket sled.
Description
Technical Field
The invention relates to the technical field of rocket sled sliding rail maintenance, in particular to a method for quickly repairing a rocket sled sliding rail fastener.
Background
The rocket sled is a large ground dynamic test system which uses a rocket engine as power to push a rocket pulley to advance at a high speed on a special track so as to obtain test data. The slide rail of the rocket sled has a single rail and a double rail. The rocket sled sliding rail is high-precision large-scale ground dynamic simulation test equipment, can complete a rocket sled test together with a sled and test equipment, and pushes the sled loaded with a test piece to run along the sliding rail through a rocket engine so as to enable the sled and the test piece to reach the speed required by the test, thereby carrying out quantitative measurement and qualitative analysis on the test piece under the condition of a simulated environment. In the process of a ground dynamic test, the requirements on the slide rail are very high, and the slide rail is required to have a stable slide rail foundation, a high-straightness alignment datum line (namely, the straight line precision of the slide rail is high) and a smooth and seamless steel rail.
In recent years, with the increasing of precision requirements of rocket sled sliding rails, especially when long rocket sled sliding rails are installed, the installation precision requirements of the sliding rails are especially high, the allowable deviation of a main rail relative to a datum line and the allowable deviation of an auxiliary rail relative to the main rail in the horizontal direction and the vertical direction are required to be within a certain tolerance, steel rails are generally specially processed, the steel rails are connected into interval seamless lines in a flash welding mode, then, fasteners are used for restricting and adjusting, the deviation in the horizontal direction and the vertical direction is controlled within a certain tolerance, the precision requirements of the sliding rails are high, and further, the rocket sled sliding rail experiment can run at a high speed.
Keeping rocket sled slide rail smoothness is the basis of the high-speed experiment of rocket sled, when equipment, environment and artificial each side uncontrollable factor, can make slide rail circuit fastener (for example locking bolt) cause the damage, in case appear in the use because of fatigue load or the fracture that the collision caused the bolt, then the backing plate can appear appearing inclining under the pressure of rail, then appear leading to the fact the irregularity of track circuit because of the rail slope. At the moment, if the broken bolt needs to be replaced, other steel rail components except the bolt need to be removed, the constraint of the steel rail is loosened, the steel rail is jacked up by using a track lifting machine, the temporary fixation is carried out by using a consolidation device, after the condition is met, a C plate and concrete are chiseled, after the embedded bolt is exposed, the whole bolt is chiseled, and the broken bolt is replaced. After the new bolt is replaced, the steel rail needs to be installed again, so that once the bolt on the rocket prying steel rail is broken and replaced, the whole bolt replacement construction time is long, and the construction investment cost is high.
Disclosure of Invention
The invention aims to provide a method for quickly repairing a slide rail fastener of a rocket sled, which can quickly repair a damaged bolt fastener and greatly reduce the maintenance cost of the rocket sled.
The technical scheme of the invention is as follows:
a method for quickly repairing a rocket sled sliding rail fastener is characterized by comprising the following steps:
s01: determining a bolt fracture position;
s02: cutting off damaged bolts pre-embedded in the C plate from the upper surface of the C plate;
s03: positioning the bolt to be replaced in a base;
s04: welding the base on the C plate;
s05: knocking off the welding slag, checking whether the welding slag is in an unwelded state, and returning to S04 if the welding slag is in the unwelded state.
Preferably, before S01, there is the following step,
s00: recording the temperature of the slide rail in site construction, and making a temporary displacement observation mark of the slide rail;
if there is only one broken bolt, step S01 is directly performed.
Preferably, before S01, there is the following step,
s00': and if the number of the broken bolts is at least two and the two bolts are not adjacent, directly executing the step S01.
Preferably, before S01, there is the following step,
s00': and if at least two broken bolts are arranged and the two broken bolts are adjacent, locking the temperature of the slide rail to 20-50 degrees and then executing the step S01.
Preferably, the method comprises the following steps:
s06: flaw detection judgment, after welding is finished, flaw detection is carried out on the welding seam to ensure the quality of the welding seam;
and if the quality of the welding seam is not qualified, the base on the plate C is removed, a new base is replaced, and the step S04 is returned.
Preferably, S07, after the flaw detection judgment is finished, replacing a base plate bearing the weight of the steel rail;
the backing plate is matched with the replaced bolt.
Preferably, before step S01, the original line Lu Shuiping and/or the line height data are checked by using a detection tool, and the original recording data of the slide rail is made.
Preferably, after replacing the tie plate after step S07, the bolt is tightened, the line state is restored from the original recorded data, and the displacement observation data is checked to ensure that the slide rail is within the allowable installation tolerance range.
When the bolts for fixing the rocket sled slideway are broken, firstly determining the broken positions of the bolts, cutting off the damaged bolts embedded in a C plate (which is positioned below the slideway and is formed by pouring concrete) from the part above the upper surface of the C plate, positioning new bolts in a base, welding the base on the C plate, knocking off welding slag, returning to the step S04 if the welding slag is not welded, and welding the base on the C plate for repair welding. In the prior art, demolish other rail members except the bolt, loosen the restraint of rail, use the jack-up to lift the rail, use consolidation device to carry out interim fixed, possess the back in the condition, chisel out C board and concrete, treat that the buried bolt exposes the back, chisel out the bolt is whole again, change the bolt that breaks. After replacing the new bolts, the rails need to be installed again. Compared with the prior art, the method for quickly repairing the slide rail fastener of the rocket sled can quickly repair the damaged bolt fastener, and greatly reduces the maintenance cost of the rocket sled.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a logic flow diagram of a method for quickly repairing rocket sled rail fasteners provided in an embodiment of the present invention;
FIG. 2 is a schematic view of the base of the present invention welded to a C plate
Fig. 3 is a schematic structural view of a slide rail fixed by bolts according to the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate an orientation or positional relationship only for convenience of description and simplicity of description, but do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Referring to fig. 1 to 3, in the method for quickly repairing a rocket sled rail fastener provided by the invention, when a bolt for fixing a rocket sled rail is broken, the broken position of the bolt is firstly determined, a damaged bolt pre-embedded in a C plate (located below the rail and formed by pouring concrete) is cut off from a part above the upper surface of the C plate, a new bolt is positioned in a base, the base is welded on the C plate, and finally welding slag is knocked off, and if the base is not welded, the step S04 is returned to, and the base is welded on the C plate for repair welding. In the prior art, demolish other rail members except the bolt, loosen the restraint of rail, use the jack-up to lift the rail, use consolidation device to carry out interim fixed, possess the back in the condition, chisel out C board and concrete, treat that the buried bolt exposes the back, chisel out the bolt is whole again, change the bolt that breaks. After replacing the new bolts, the rails need to be installed again. Compared with the prior art, the method for quickly repairing the slide rail fastener of the rocket sled can quickly repair the damaged bolt fastener, and greatly reduce the maintenance cost of the rocket sled.
Example one
S00: recording the temperature of the slide rail in site construction, and making a temporary displacement observation mark of the slide rail;
if only one broken bolt is available, directly executing the step S01;
s01: determining a bolt fracture position;
s02: cutting off damaged bolts pre-embedded in the C plate from the upper surface of the C plate;
s03: positioning the bolt to be replaced in a base;
s04: welding the base on the C plate;
s05: knocking off the welding slag, checking whether the welding slag is in an unwelded state, and returning to S04 if the welding slag is in the unwelded state.
If the number of the broken bolts is one, the broken bolts belong to point position damage, and only the temporary displacement observation mark of the slide rail needs to be made to judge whether the slide rail deviates in the bolt replacing process.
Example two
S00': recording the temperature of the slide rail in site construction, and making a temporary displacement observation mark of the slide rail;
if the number of the broken bolts is at least two and the two bolts are not adjacent, directly executing the step S01;
s01: determining a bolt fracture position;
s02: cutting off damaged bolts pre-embedded in the C plate from the upper surface of the C plate;
s03: positioning the bolt to be replaced in a base;
s04: welding the base on the C plate;
s05: knocking off the welding slag, checking whether the welding slag is in an unwelded state, and returning to S04 if the welding slag is in the unwelded state.
If the broken bolts have at least two, and normally used bolts are arranged between every two broken bolts, the constraint force of the bolts on the sliding rail is not greatly influenced, and each broken bolt belongs to point position damage, and only a temporary displacement observation mark of the sliding rail needs to be made to judge whether the sliding rail deviates or not in the process of replacing the bolts.
EXAMPLE III
S00': if the number of the broken bolts is at least two and the two bolts are adjacent, the temperature of the slide rail is locked at 20-50 degrees;
s01: determining a bolt fracture position;
s02: cutting off damaged bolts pre-embedded in the C plate from the upper surface of the C plate;
s03: positioning the bolt to be replaced in a base;
s04: welding the base on the C plate;
s05: and knocking off the welding slag, checking whether an unwelded state exists, and returning to S04 if the unwelded state exists.
Once there are two adjacent bolts all to appear the fracture, when welding the base on the C board, can produce a large amount of heats, and this kind of heat can make the internal stress of rail unbalanced, and then makes the rail produce the skew of minizone, and this kind of skew can make the horizontal direction of slide rail or vertical direction appear the deviation, then makes rocket sled slide rail experiment can not high-speed operation. On the other hand, if the broken bolts are continuous, when the adjacent bolts are welded, the temperature of another broken bolt is increased, and when the broken bolts are welded again, the temperature is also continuously increased, so that the internal stress of the steel rail is increased again, and the stress at each broken bolt is different, and for both reasons, the temperature of the whole area of the broken bolts is locked at 20 ° to 50 ° before welding.
Example four
S01: determining a bolt fracture position;
s02: cutting off damaged bolts pre-embedded in the C plate from the upper surface of the C plate;
s03: positioning the bolt to be replaced in a base;
s04: welding the base on the C plate;
s05: knocking off the welding slag, checking whether the welding slag is in an unwelded state, and returning to S04 if the welding slag is in the unwelded state.
S06: flaw detection judgment, after welding is finished, flaw detection is carried out on the welding seam to ensure the quality of the welding seam;
and if the quality of the welding seam is not qualified, the base on the plate C is removed, a new base is replaced, and the step S04 is returned.
In step S05, whether or not there is an unwelded state between the base and the C plate, that is, an appearance inspection of the welded position is performed, and if there is a significant unwelded position, the process returns to step S04 to perform repair welding. And S04, removing iron slag, dust and the like on the surface to be welded, preheating the surfaces of the base and the C plate by using a baking gun, heating to 80 ℃, welding by using a J557 welding rod, straightening welding current by 240A, overlaying welding in two layers in the welding process, and executing S05 after the welding is finished.
Meanwhile, welding seams are possibly formed in the welding position, so that the strength of the welding position is reduced, the position of the appearance which is not welded is inspected, flaw detection judgment is needed, penetration flaw detection is mainly selected, magnetic particle flaw detection is an auxiliary detection mode, and due to the fact that the installation accuracy required for the rocket sled slide rail is high, all welding seams are subjected to flaw detection by adopting a primary welding seam acceptance standard. When the penetrant flaw detection is adopted, after one layer is welded, when the temperature reaches the range of 10-50 degrees, penetrant spraying can be carried out on the welding seam for verification, surface cracks are avoided, after the first layer is judged to be qualified, the second layer can be welded, flaw detection verification can be carried out in the same mode, and the penetrant flaw detection can be used after all layers are qualified. The method provided by the invention is used on a rocket sled slide rail, and the magnetic particle inspection is used during the experimental interval as a later auxiliary confirmation mode instead of only adopting the magnetic particle inspection due to the requirement of the slide rail experiment. And if the flaw detection judges that a welding seam exists in the welding position, the welded base needs to be detached from the C plate, a new base needs to be replaced, the step S04 is returned, and welding is carried out again.
EXAMPLE five
S01: determining a bolt fracture position;
s02: cutting off damaged bolts pre-embedded in the C plate from the upper surface of the C plate;
s03: positioning the bolt to be replaced in a base;
s04: welding the base on the C plate;
s05: knocking off the welding slag, checking whether the welding slag is in an unwelded state, and returning to S04 if the welding slag is in the unwelded state.
S06: flaw detection judgment, after welding is finished, flaw detection is carried out on the welding seam to ensure the quality of the welding seam; and if the quality of the welding seam is not qualified, the base on the plate C is removed, a new base is replaced, and the step S04 is returned.
S07: and after flaw detection judgment is finished, replacing the base plate bearing the weight of the steel rail.
When fasteners such as bolts are used for installing the slide rail on the C plate, a base plate is usually arranged at the bottom of the slide rail in a padding mode, stress concentration can occur in the welding process, and then the precision of the rocket sled slide rail is influenced.
EXAMPLE six
A01: and (3) checking the original line Lu Shuiping and/or line height data by using a detection tool, and making original recording data of the slide rail.
S01: determining a bolt fracture position;
s02: cutting off damaged bolts pre-embedded in the C plate from the upper surface of the C plate;
s03: positioning the bolt to be replaced in a base;
s04: welding the base on the C plate;
s05: knocking off the welding slag, checking whether the welding slag is in an unwelded state, and returning to S04 if the welding slag is in the unwelded state.
S06: flaw detection judgment, after welding is finished, flaw detection is carried out on the welding seam to ensure the quality of the welding seam; and if the quality of the welding seam is not qualified, the base on the plate C is removed, a new base is replaced, and the step S04 is returned.
S07: after flaw detection is finished, replacing a base plate bearing the weight of the steel rail;
and B01, after the base plate is replaced, fastening bolts, recovering the line state according to the original recorded data, and checking displacement observation data to ensure that the slide rail is within an allowable installation tolerance range.
And (3) making original recorded data before welding, recovering the state of the slide rail line according to the original recorded data after welding is finished and the base plate and the fastening bolt are replaced, checking displacement observation data, and ensuring that the slide rail is in an allowable installation tolerance range so as to ensure the smooth operation of a high-speed experiment of the rocket sled.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts in the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. A method for quickly repairing a rocket sled sliding rail fastener is characterized by comprising the following steps:
s01: determining a bolt fracture position;
s02: cutting off damaged bolts pre-embedded in the C plate from the upper surface of the C plate;
s03: positioning the bolt to be replaced in a base;
s04: welding the base on the C plate;
s05: knocking off the welding slag, checking whether an unwelded state exists, and returning to S04 if the unwelded state exists;
before S01, there are the following steps,
s00: recording the temperature of the slide rail in site construction, and making a temporary displacement observation mark of the slide rail;
if only one broken bolt is available, directly executing the step S01;
if the number of the broken bolts is at least two and the two bolts are not adjacent, directly executing the step S01;
and if at least two broken bolts are arranged and the two broken bolts are adjacent, locking the temperature of the slide rail to 20-50 degrees and then executing the step S01.
2. A method of quickly repairing a rocket sled slide fastener as recited in claim 1, comprising the steps of:
s06: flaw detection judgment, after welding is finished, flaw detection is carried out on the welding seam to ensure the quality of the welding seam;
and if the quality of the welding seam is not qualified, the base on the plate C is removed, a new base is replaced, and the step S04 is returned.
3. A rocket sled rail fastener quick repair method according to claim 2,
s07, replacing a base plate bearing the weight of the steel rail after flaw detection judgment is finished;
the backing plate is matched with the replaced bolt.
4. A rocket sled rail fastener quick repair method according to claim 3 wherein prior to step S01 there are the following steps:
a01: checking original line Lu Shuiping and/or line height data by using a detection tool, and making original recording data of the slide rail;
after the step S07 is carried out in the next step,
and B01, after the base plate is replaced, fastening bolts, recovering the state of the line according to the original recorded data, and checking displacement observation data to ensure that the slide rail is in an allowable installation tolerance range.
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| CN202110406636.6A CN113084448B (en) | 2021-04-15 | 2021-04-15 | Rapid repairing method for rocket sled sliding rail fastener |
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| CN202110406636.6A CN113084448B (en) | 2021-04-15 | 2021-04-15 | Rapid repairing method for rocket sled sliding rail fastener |
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