CN110653578A - Titanium alloy shell, wheel rail detection instrument and processing method of titanium alloy shell - Google Patents
Titanium alloy shell, wheel rail detection instrument and processing method of titanium alloy shell Download PDFInfo
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- CN110653578A CN110653578A CN201911028543.3A CN201911028543A CN110653578A CN 110653578 A CN110653578 A CN 110653578A CN 201911028543 A CN201911028543 A CN 201911028543A CN 110653578 A CN110653578 A CN 110653578A
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- shell
- titanium alloy
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- detection instrument
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 33
- 238000001514 detection method Methods 0.000 title claims abstract description 18
- 238000003672 processing method Methods 0.000 title claims description 7
- 238000000034 method Methods 0.000 claims description 14
- 238000005266 casting Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000003754 machining Methods 0.000 claims description 10
- 238000005488 sandblasting Methods 0.000 claims description 10
- 238000005495 investment casting Methods 0.000 claims description 8
- 238000005498 polishing Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims 1
- 238000007689 inspection Methods 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 239000002253 acid Substances 0.000 abstract description 2
- 239000003513 alkali Substances 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 description 12
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 8
- 239000010936 titanium Substances 0.000 description 8
- 229910052719 titanium Inorganic materials 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000010923 batch production Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/08—Measuring installations for surveying permanent way
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
- G01D11/245—Housings for sensors
Abstract
The invention discloses a titanium alloy shell for supporting a wheel rail detection instrument, which comprises: a first housing having a rectangular parallelepiped structure; the second shell is provided with a cylindrical structure, is mutually connected with the first shell and is internally communicated, and the height direction of the cylindrical structure is vertical to a straight line where the longest side of the cuboid structure is located; and the mounting edge is arranged on one side of the first shell, which is far away from the second shell. The embodiment disclosed by the invention can enable the shell to have excellent performances of acid and alkali corrosion resistance, high strength, lightness, attractiveness and the like.
Description
Technical Field
The invention relates to the field of accessories for rail detection equipment, in particular to accessories for a wheel rail detector, and specifically relates to a titanium alloy shell, a wheel rail detection instrument and a processing method of the titanium alloy shell.
Background
The shell is a main body structure of the wheel track detector, and a detection electronic circuit and a sensor need to be installed inside the shell. Because the working environment of the wheel rail detector is severe, so that the shell is required to be resistant to pollution, resistant to corrosion and high in strength, and meanwhile, the shell is used as a detection instrument and is required to be light and attractive in appearance. The existing shell is partially made of iron materials, is easy to corrode and pollute and influences the normal work of the internal sensor, and the existing shell is partially made of aluminum materials, is not easy to corrode and pollute, but has insufficient strength.
The titanium metal has the advantages of pollution resistance, corrosion resistance, high strength and the like, and is widely applied to the fields of aviation, aerospace, chemical engineering, petroleum, metallurgy, electric power, seawater desalination, various naval vessels for military and civil use, automobile manufacturing, medical treatment and health, many daily necessities and the like. The reserve of titanium in the earth is second only to iron and aluminum, referred to as the third metal. The titanium product has high strength, low density, good mechanical performance, good toughness and corrosion resistance. However, the titanium metal is complicated in working process, particularly difficult in cutting, and is very likely to absorb impurities such as hydrogen, oxygen, carbon and the like in hot working.
Disclosure of Invention
At least one object of the present invention is to provide a titanium alloy casing, a wheel rail detecting instrument and a method for processing the titanium alloy casing, which enable the casing to have excellent properties of acid and alkali corrosion resistance, high strength, lightness, beauty and the like. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a titanium alloy shell which is used for supporting a wheel rail detection instrument and is characterized by comprising the following components:
a first housing having a rectangular parallelepiped structure;
the second shell is provided with a cylindrical structure, is mutually connected with the first shell and is internally communicated, and the height direction of the cylindrical structure is vertical to a straight line where the longest side of the cuboid structure is located; and
and the mounting edge is arranged on one side of the first shell, which is far away from the second shell.
As an optimization of any one of the technical solutions or any optimized technical solution provided in the foregoing or the following of the present invention, the second housing includes:
and the thread is arranged on the inner surface of the outer side of the second shell and is used for connecting parts of the wheel track detection instrument, which are positioned outside the shell.
As an optimization of any one of the technical solutions or any optimized technical solution provided in the foregoing or following paragraphs of the present invention, the mounting edge includes:
and the mounting holes are formed in one side of the mounting edge, which is far away from the second shell, and are used for realizing the fixed mounting of the titanium alloy shell at a set position.
As an optimization of any one of the technical solutions or any one of the optimized technical solutions provided in the foregoing or the following paragraphs, the cylindrical structure protrudes from the rectangular parallelepiped structure of the first housing in a first direction, the mounting edge protrudes from the rectangular parallelepiped structure of the first housing in a second direction, and the first direction is opposite to the second direction.
As an optimization of any one of the technical solutions or any optimized technical solution provided in the foregoing or the following of the present invention, the first housing further includes:
and the plurality of assembling holes are formed in the first side face of the cuboid structure and used for connecting parts, located in the shell, of the wheel rail detection instrument.
The invention provides a wheel rail detection instrument, which comprises a titanium alloy shell in any one of the technical schemes.
The invention provides a processing method of a titanium alloy shell, which comprises the following steps:
selecting a titanium alloy material to carry out precision casting to obtain a casting blank of the shell;
carrying out heat treatment on the cast blank;
polishing the heat-treated casting blank;
machining threads on the polished casting blank by using a precise numerical control lathe;
machining a plurality of mounting holes and a plurality of assembling holes by using a numerical control machining center; and
and then carrying out surface sand blasting treatment to achieve uniform and consistent appearance color.
As an optimization of any one of the technical solutions or any one of the optimized technical solutions provided in the foregoing or the following of the present invention, in the process of obtaining the cast blank of the shell, a high-precision mold is adopted for forming, thereby realizing the thin-walled characteristic of the shell.
As for any technical scheme provided in the invention or in the following or any optimized technical scheme, in the process of carrying out heat treatment on the cast blank, the aging temperature is controlled to be 450-475 ℃, the time is 8-24 hours, and the cooling mode is selected to be air cooling.
As an optimization of any one of the technical solutions provided in the foregoing or the following paragraphs or any one of the optimized technical solutions, the processed surface of the shell is subjected to a dry-wet two-pass sand blasting treatment.
Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:
by adopting titanium material for precision casting, the consistency of the blank provides conditions for batch production, the processing time is reduced, and the production efficiency is improved; the deformation of a cast blank is reduced by heat treatment and polishing treatment, the finished product rate of the machined blank is improved, and the appearance of parts is attractive and smooth; the high-precision numerical control lathe and the numerical control machining center are adopted for machining, the high-precision size requirement and the relative position requirement of each hole are effectively guaranteed, errors during the assembly of the whole machine are reduced, the assembly efficiency is improved, and the performance of the whole machine is improved; through manual polishing and two-time sand blasting in the later period, the surface is smooth and attractive, the edges and corners are smooth, and the visual attractive requirement of the whole machine assembly is met.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic structural diagram of a titanium alloy housing according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a right view angle of the titanium alloy housing according to the embodiment of the present invention;
fig. 3 is a schematic structural diagram of a front view angle of a titanium alloy housing according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a left side view angle of the titanium alloy housing according to the embodiment of the present invention;
FIG. 5 is a schematic cross-sectional structural view of a titanium alloy housing according to an embodiment of the present invention;
reference numerals: 1. the first shell, 2, the second shell, 3, the installation edge, 4, the screw thread, 5, the mounting hole, 6, the pilot hole.
Detailed Description
The contents of the present invention and the points of distinction between the present invention and the prior art can be understood with reference to the accompanying drawings and the text. The invention will now be described in further detail, including the preferred embodiments, with reference to the accompanying drawings, in which some alternative embodiments of the invention are shown. It should be noted that: any technical features and any technical solutions in the present embodiment are one or more of various optional technical features or optional technical solutions, and for the sake of brevity, this document cannot exhaustively enumerate all the alternative technical features and alternative technical solutions of the present invention, and is also not convenient for each embodiment of the technical features to emphasize it as one of various optional embodiments, so those skilled in the art should know that: any technical means provided by the invention can be replaced or any two or more technical means or technical characteristics provided by the invention can be combined with each other to obtain a new technical scheme. Any technical features and any technical solutions in the present embodiment do not limit the scope of the present invention, and the scope of the present invention should include any alternative technical solutions that can be conceived by those skilled in the art without inventive efforts and new technical solutions that can be obtained by those skilled in the art by combining any two or more technical means or technical features provided by the present invention with each other.
The embodiment of the invention provides a titanium alloy shell for supporting a wheel rail detection instrument, which is characterized by comprising the following components:
a first housing having a rectangular parallelepiped structure;
the second shell is provided with a cylindrical structure, is mutually connected with the first shell and is internally communicated, and the height direction of the cylindrical structure is vertical to a straight line where the longest side of the cuboid structure is located; and
and the mounting edge is arranged on one side of the first shell, which is far away from the second shell.
As an optimization of any one of the technical solutions or any optimized technical solution provided in the foregoing or the following of the present invention, the second housing includes:
and the thread is arranged on the inner surface of the outer side of the second shell and is used for connecting parts of the wheel track detection instrument, which are positioned outside the shell.
As an optimization of any one of the technical solutions or any optimized technical solution provided in the foregoing or following paragraphs of the present invention, the mounting edge includes:
and the mounting holes are formed in one side of the mounting edge, which is far away from the second shell, and are used for realizing the fixed mounting of the titanium alloy shell at a set position.
As an optimization of any one of the technical solutions or any one of the optimized technical solutions provided in the foregoing or the following paragraphs, the cylindrical structure protrudes from the rectangular parallelepiped structure of the first housing in a first direction, the mounting edge protrudes from the rectangular parallelepiped structure of the first housing in a second direction, and the first direction is opposite to the second direction.
As an optimization of any one of the technical solutions or any optimized technical solution provided in the foregoing or the following of the present invention, the first housing further includes:
and the plurality of assembling holes are formed in the first side face of the cuboid structure and used for connecting parts, located in the shell, of the wheel rail detection instrument.
The invention provides a wheel rail detection instrument, which comprises a titanium alloy shell in any one of the technical schemes.
The invention provides a processing method of a titanium alloy shell, which comprises the following steps:
selecting a titanium alloy material to carry out precision casting to obtain a casting blank of the shell;
carrying out heat treatment on the cast blank;
polishing the heat-treated casting blank;
machining threads on the polished casting blank by using a precise numerical control lathe;
machining a plurality of mounting holes and a plurality of assembling holes by using a numerical control machining center; and
and then carrying out surface sand blasting treatment to achieve uniform and consistent appearance color.
The shell is formed by titanium material precision casting, and a high-precision die is adopted for forming, so that the thin-wall characteristic required by parts is realized, the high-strength and corrosion-resistant requirements required by design are met, the appearance is attractive, and the lines are smooth. The precision casting molding greatly reduces the processing amount of subsequent machining of parts, but greatly improves the difficulty of machining.
And carrying out heat treatment on the cast blank by the shell, eliminating the deformation problem caused by unbalanced internal stress after casting, facilitating the subsequent part processing and the dimensional stability after finished products, and avoiding the deformation after the part processing.
The shell is polished, so that the edges and corners of the casting are smooth, and the surface of the casting is smooth and attractive.
The shell is processed by adopting a high-precision numerical control lathe and a numerical control processing center, so that the high-precision size requirement and the relative position requirement of each hole are effectively ensured.
The surface of the processed shell is subjected to dry-wet sand blasting treatment to meet the requirements of uniform and consistent appearance, light and beautiful appearance
As an optimization of any one of the technical solutions or any one of the optimized technical solutions provided in the foregoing or the following of the present invention, in the process of obtaining the cast blank of the shell, a high-precision mold is adopted for forming, thereby realizing the thin-walled characteristic of the shell.
As for any technical scheme provided in the invention or in the following or any optimized technical scheme, in the process of carrying out heat treatment on the cast blank, the aging temperature is controlled to be 450-475 ℃, the time is 8-24 hours, and the cooling mode is selected to be air cooling.
As an optimization of any one of the technical solutions provided in the foregoing or the following paragraphs or any one of the optimized technical solutions, the processed surface of the shell is subjected to a dry-wet two-pass sand blasting treatment.
Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:
by adopting titanium material for precision casting, the consistency of the blank provides conditions for batch production, the processing time is reduced, and the production efficiency is improved; the deformation of a cast blank is reduced by heat treatment and polishing treatment, the finished product rate of the machined blank is improved, and the appearance of parts is attractive and smooth; the high-precision numerical control lathe and the numerical control machining center are adopted for machining, the high-precision size requirement and the relative position requirement of each hole are effectively guaranteed, errors during the assembly of the whole machine are reduced, the assembly efficiency is improved, and the performance of the whole machine is improved; through manual polishing and two-time sand blasting in the later period, the surface is smooth and attractive, the edges and corners are smooth, and the visual attractive requirement of the whole machine assembly is met.
The technical scheme provided by the invention is explained in more detail in the following with reference to the attached drawings.
Fig. 1 is a bottom view, and is designed with structures such as a threaded hole, a positioning pin hole, an outer frame and the like, and the structures are mainly processed by a precise numerical control machining center, so that the requirements on the flatness of an assembly binding surface and the precision of the positioning pin hole are high. Fig. 2 is a right side view and fig. 3 is a front view, which are external shapes of the shell, and require smooth and beautiful surface and smooth edges and corners, and the quality requirements of the surface are met by mainly adopting manual polishing and two-time sand blasting in the later period, and meanwhile, a precise numerical control machining center is required to process each hole and an outer surface sinking platform. FIG. 4 is a left side view, which is processed by a precision numerical control processing center. FIG. 5 is a cross-sectional view, the mouth is designed with connecting screw threads, and the centering is required to be accurate and the wall thickness is required to be uniform by adopting the numerical control lathe for processing.
The invention solves the problems of complex shape of the inner part and the outer part of the shell, high requirement on acid-base corrosion resistance, high requirement on assembly size precision and the like, and adopts the processes of titanium material precision casting, heat treatment, high-precision numerical control processing, grinding, sand blasting and the like to meet the design requirement.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.
Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated. Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
If the terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the description of the invention, the above-described terms are intended to be based on the orientations and positional relationships shown in the drawings, and are used only for convenience in describing and simplifying the description, and do not indicate or imply that the referenced device, mechanism, component, or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the invention.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (10)
1. A titanium alloy housing for supporting a wheel and rail inspection instrument, comprising:
a first housing having a rectangular parallelepiped structure;
the second shell is provided with a cylindrical structure, is mutually connected with the first shell and is internally communicated, and the height direction of the cylindrical structure is vertical to a straight line where the longest side of the cuboid structure is located; and
and the mounting edge is arranged on one side of the first shell, which is far away from the second shell.
2. The titanium alloy housing of claim 1, wherein said second housing comprises:
and the thread is arranged on the inner surface of the outer side of the second shell and is used for connecting parts of the wheel track detection instrument, which are positioned outside the shell.
3. The titanium alloy housing of claim 1, wherein said mounting rim comprises:
and the mounting holes are formed in one side of the mounting edge, which is far away from the second shell, and are used for realizing the fixed mounting of the titanium alloy shell at a set position.
4. The titanium alloy housing of claim 1, wherein said cylindrical structure protrudes from said rectangular parallelepiped structure of said first housing in a first direction, said mounting edge protrudes from said rectangular parallelepiped structure of said first housing in a second direction, and said first direction is opposite to said second direction.
5. The titanium alloy housing of claim 1, wherein said first housing further comprises:
and the plurality of assembling holes are formed in the first side face of the cuboid structure and used for connecting parts, located in the shell, of the wheel rail detection instrument.
6. A wheel rail detection instrument, comprising the titanium alloy housing according to any one of claims 1 to 5.
7. A processing method of a titanium alloy shell is characterized by comprising the following steps:
selecting a titanium alloy material to carry out precision casting to obtain a casting blank of the shell;
carrying out heat treatment on the cast blank;
polishing the heat-treated casting blank;
machining threads on the polished casting blank by using a precise numerical control lathe;
machining a plurality of mounting holes and a plurality of assembling holes by using a numerical control machining center; and
and then carrying out surface sand blasting treatment to achieve uniform and consistent appearance color.
8. The process of claim 7 wherein high precision die forming is used in obtaining the cast blank of the shell to achieve the thin wall character of the shell.
9. The processing method according to claim 7, wherein in the process of carrying out heat treatment on the cast blank, the aging temperature is controlled to be 450-475 ℃ and the time is controlled to be 8-24 hours, and the cooling mode is air cooling.
10. The process of claim 7, wherein the finished surface of the shell is subjected to a dry-wet blasting process.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911028543.3A CN110653578A (en) | 2019-10-28 | 2019-10-28 | Titanium alloy shell, wheel rail detection instrument and processing method of titanium alloy shell |
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| CN201911028543.3A CN110653578A (en) | 2019-10-28 | 2019-10-28 | Titanium alloy shell, wheel rail detection instrument and processing method of titanium alloy shell |
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