CN110142704B - Welding inspection method for aluminum plate-fin radiator - Google Patents
Welding inspection method for aluminum plate-fin radiator Download PDFInfo
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- CN110142704B CN110142704B CN201910335284.2A CN201910335284A CN110142704B CN 110142704 B CN110142704 B CN 110142704B CN 201910335284 A CN201910335284 A CN 201910335284A CN 110142704 B CN110142704 B CN 110142704B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
Abstract
The invention discloses a welding inspection method for an aluminum plate-fin radiator, wherein a clamp comprises a positioning underframe assembly (1), the upper end of the positioning underframe assembly (1) is connected with a connecting support assembly (2), and an adjusting and limiting structure for a radiator core in the up-and-down direction is arranged on the positioning underframe assembly (1); the left end and the right end of the connecting bracket component (2) are respectively connected with the compactor component (3), the upper end of the connecting bracket component is connected with the nozzle positioner component (4), and the front end and the rear end of the connecting bracket component are detachably connected with the switching positioning plate component (5) or the inspection mandrel (6). The welding inspection method can meet the requirements of welding inspection of the aluminum plate-fin radiator on the airplane and ensure that the product meets the inspection and acceptance requirements.
Description
Technical Field
The invention relates to a test fixture and a test method for an assembly structure, in particular to a test fixture and a test method for a radiator assembly structure, which can meet the requirements of mechanical processing after combined positioning, positioning welding and radiator welding and then utilize the fixture for testing, and belongs to the technical field of radiator assembly.
Background
The aluminum plate-fin radiator adopts air as a cooling medium, realizes heat exchange through an internal radiator structure, reduces the temperature of hot lubricating oil to a required range, and radiates heat through the air. The radiator mainly has the installation requirements of a left connecting flange plate installation connecting hole and a right connecting flange plate installation connecting hole, has higher requirements on form and position dimensional tolerance, requires the relative position dimensional relation requirements of a connecting pipe nozzle, a connecting flange hole position and a connecting end face, and needs to design a clamp and a detection method suitable for welding detection of the aluminum plate-fin radiator in order to meet the actual production requirements.
Disclosure of Invention
In view of the above problems, the present invention provides a method for inspecting the welding of an aluminum plate-fin heat sink, wherein the inspection jig is of a mechanical structure, and is used for performing mechanical processing after combined positioning, fixed position welding and heat sink welding by using the jig, and then the jig is used for inspection. The invention needs to ensure that the aluminum plate-fin radiator on the airplane meets the installation requirements, in particular the assembly technical requirements of the left and right connecting flange plate installation holes, the connecting flanges can be positioned and welded by utilizing the assembly fixture, the mutual position relation between the installation holes and the nozzle is ensured by positioning after the radiator is machined after welding, and the installation requirements of products on the airplane can be met.
In order to solve the problems, the invention adopts the following technical scheme:
a welding inspection fixture for an aluminum plate-fin radiator comprises a positioning underframe assembly, wherein the upper end of the positioning underframe assembly is connected with a connecting support assembly, and an adjusting and limiting structure for the up-and-down direction of a radiator core is arranged on the positioning underframe assembly;
the left end and the right end of the connecting bracket component are respectively connected with the compactor component, the upper end of the connecting bracket component is connected with the nozzle positioner component, and the front end and the rear end of the connecting bracket component are detachably connected with the switching positioning plate component or the inspection mandrel;
the compactor assembly is used for compacting and positioning the left side and the right side of the radiator core;
the nozzle positioner assembly is used for positioning the radiator nozzle and the cylinder reinforcing angle plate;
the switching positioning plate assembly is used for positioning and clamping when machining allowances are left on left and right flange plates of an air inlet and an air outlet of the radiator;
the inspection mandrel is used for positioning inspection after the positioning welding and machining of the left flange and the right flange of the air inlet and the air outlet of the radiator.
Preferably, the positioning underframe assembly comprises an installation floor, the upper end surface of the installation floor is in threaded connection with a plurality of adjusting screws perpendicular to the upper end surface of the installation floor, and hexagonal nuts are arranged between the adjusting screws and the installation floor.
Preferably, the connecting bracket assembly comprises a pair of positioning angle plates which are arranged at intervals, and the upper ends of the two positioning angle plates are connected through a connecting flat plate.
Preferably, square holes are formed in the positioning corner plates and the connecting flat plate.
Preferably, the compactor assembly comprises a connecting vertical plate connected with the connecting support assembly, a compacting screw rod is perpendicular to the connecting vertical plate and is in threaded connection with the connecting vertical plate, one end of the compacting screw rod is connected with the cylindrical pin, and the other end of the compacting screw rod is connected with the smooth surface pressing block with a smooth and flat end surface.
Preferably, the nozzle positioner assembly comprises a first positioning plate and a second positioning plate which are connected with the upper end of the connecting bracket assembly;
the first positioning plate and the second positioning plate are respectively connected with a positioning shaft pin, and the tail end of the positioning shaft pin is a transfer pipe nozzle;
the first positioning plate is also in threaded connection with a knurled flat-head screw for compressing the positioning shaft pin;
the second positioning plate is also provided with a limiting shaft pin and a knurled flat-head screw which is respectively used for compressing the positioning shaft pin and the limiting shaft pin;
the axes of the positioning shaft pins on the first positioning plate and the second positioning plate are collinear and are parallel to the axis of the limiting shaft pin.
Preferably, the switching positioning plate assembly comprises a positioning welding shaft pin and a positioning pressing sleeve, and the positioning welding shaft pin and the positioning pressing sleeve are movably connected to the outer side of the switching positioning plate;
the inner side of the switching positioning plate is connected with the threaded pressing sleeve, the pressing plate and the inner hexagon screw.
Preferably, the inspection mandrel comprises a fixing plate, and the mandrel is movably connected to the fixing plate.
A welding inspection method for an aluminum plate-fin radiator comprises the following steps:
the method comprises the following steps that firstly, a transfer positioning plate assembly is detached from a clamp, an air inlet and outlet flange of a radiator is installed in the clamp transfer positioning plate assembly, and a flange plate of the radiator is clamped by a pressing plate on the clamp;
secondly, a core assembly of the radiator is arranged on a positioning underframe assembly of the fixture, the core assembly is initially coordinated and positioned by an adjusting screw rod, and the compactor assembly is initially used for compacting and limiting;
mounting the switching positioning plate assembly provided with the flange plate with the machining allowance of the radiator on the connecting support assembly, adjusting the mutual position relation between the radiator core assembly and the flange plate, repairing and coordinating well, and preliminarily locking and limiting;
installing a valve seat of the radiator on the pipe nozzle positioner assembly, adjusting and positioning to perform preliminary locking and limiting, repairing a supporting plate of the radiator, positioning a product part supporting plate by using a limiting shaft pin, and performing preliminary locking and limiting;
step five, adjusting and coordinating welding butt seam clearance according to welding process requirements, adjusting and assembling the welding butt seam clearance according to the process regulation requirements after ensuring the dimension, finely adjusting an adjusting screw rod, coordinating the mutual position relation of a core component of the radiator, an air inlet and outlet flange and a valve seat, re-compressing and limiting a compressor component, re-locking and limiting a switching positioning plate component on a connecting bracket component, and positioning and locking a nozzle positioner component on the valve seat and a supporting plate of the radiator;
step six, machining after welding an air inlet and outlet flange of the radiator according to the requirement of a process specification, putting the product with the processed flange plate appearance, end plane and flange connecting hole into an inspection clamp for positioning, and detecting the coaxiality of the product by using an inspection mandrel;
step seven, checking the requirements of the mutual position relationship, shape and position sizes between the flange plate of the radiator and the pipe nozzle according to the process requirements and the drawing requirements;
and step eight, unloading the product which is subjected to assembly inspection from the clamp, and cleaning and inspecting.
Preferably, in the fourth step, welding shrinkage gaskets are added on the bottom surfaces of the first positioning plate and the second positioning plate of the nozzle positioner assembly.
The welding inspection fixture and the inspection method for the aluminum plate-fin radiator have the following characteristics:
1. the welding inspection clamp is relatively simple to manufacture and convenient to use;
2. the air inlet and outlet flanges of the radiator are independently installed in the adapter positioning plate assembly disassembled from the clamp, so that the coordination and the limit are conveniently adjusted;
3. the welding inspection fixture is used for positioning the adjusting screw rod in the underframe assembly, the upper and lower positions of the core assembly of the radiator are easily adjusted and positioned, and the left and right positions of the core assembly of the radiator are adjusted and positioned by the compactor assembly, so that the fixture mechanism is simple and compact, and the positioning and clamping operation is convenient and applicable;
4. the welding inspection clamp is convenient to reset again, the using effect is good, the quality is reliable and stable, the requirements of the mutual position relation, the form and the position and the size between the flange plate and the nozzle of the product are ensured, and the mounting requirements of the product on an airplane are met;
5. the welding inspection fixture not only ensures the smooth delivery of the product with quality, but also creates good economic benefit.
Drawings
FIG. 1, FIG. 1-2, and FIG. 1-3 are diagrammatic views of a weld inspection fixture apparatus;
FIG. 2, FIG. 2-1, FIG. 2-2, and FIG. 2-3 are diagrammatic views of a welding inspection fixture apparatus with a product mounted thereon;
FIG. 3, FIG. 3-1, FIG. 3-2, and FIG. 3-3 are schematic views of a positioning chassis assembly;
FIG. 4, FIG. 4-1, FIG. 4-2 and FIG. 4-3 are schematic views of a connecting bracket assembly;
FIG. 5, FIG. 5-1, FIG. 5-2 and FIG. 5-3 are schematic views of an impactor assembly;
FIG. 6, FIG. 6-1, FIG. 6-2 and FIG. 6-3 are schematic views of a nozzle positioner assembly;
FIG. 7, FIG. 7-1, FIG. 7-2, and FIG. 7-3 are schematic illustrations of an adapter retaining plate assembly;
fig. 8, 8-1, 8-2 and 8-3 are schematic diagrams of inspection mandrels.
Detailed Description
The invention is further described with reference to the accompanying drawings, but the scope of protection claimed is not limited thereto.
In this embodiment, the welding inspection fixture for the aluminum plate-fin radiator mainly comprises a positioning underframe assembly 1, a connecting bracket assembly 2, a compactor assembly 3, a nozzle positioner assembly 4, a switching positioning plate assembly 5 and an inspection mandrel 6. The welding inspection fixture for the aluminum plate-fin radiator is shown in a schematic view in fig. 1, 1-2 and 1-3; the product schematic diagram of the welding inspection fixture for the aluminum plate-fin radiator is shown in figures 2, 2-1, 2-2 and 2-3.
1. The positioning chassis assembly 1 (shown in fig. 3, 3-1, 3-2 and 3-3) is a mounting chassis of an aluminum plate-fin heat sink welding inspection jig, and comprises: the installation floor 11, the hexagon nut 12 and the adjusting screw 13, and the main function of the installation floor is to install the positioning connection bracket component 2 and the heat dissipation core of the upper and lower positioning adjustment limiting product;
2. the connecting bracket assembly 2 (shown in figures 4, 4-1, 4-2 and 4-3) mainly comprises a positioning angle plate 21 and a connecting flat plate 22, and mainly functions to mount and position the nozzle positioner assembly 4 and mount and position the adapter positioning plate assembly 5;
3. the impactor assembly 3 (shown with reference to fig. 5, 5-1, 5-2 and 5-3) includes: the connecting vertical plate 31, the smooth pressing block 32, the compression screw 33 and the cylindrical pin 34 are mainly used for positioning and adjusting the heat dissipation core of the limiting radiator in the left and right directions and compressing the heat dissipation core of the radiator in the left and right directions;
4. the nozzle positioner assembly 4 (shown with reference to fig. 6, 6-1, 6-2, and 6-3) includes: the positioning device comprises a first positioning plate 41, a positioning shaft pin 42, a switching nozzle 43, a limiting shaft pin 44, a knurled flat-head screw 45 and a second positioning plate 46, and has the main functions of positioning the nozzle of the radiator and positioning a cylinder reinforcing angle plate of the radiator to ensure the mutual position relation of the nozzle and a left flange mounting hole and a right flange mounting hole;
5. the patch panel assembly 5 (shown with reference to fig. 7, 7-1, 7-2, and 7-3) includes: the positioning welding shaft pin 51, the positioning pressing sleeve 52, the thread pressing sleeve 53, the pressing plate 54, the inner hexagon screw 55 and the switching positioning plate 56, and the main functions of the positioning welding shaft pin are to position and press the air inlet and outlet flange parts of the radiator (note: the shape and the end face of the flange plate of the radiator are provided with machining allowance, and the flange plate is not provided with a drilling reserved hole);
6. the inspection mandrel 6 (shown in figures 8, 8-1, 8-2 and 8-3) comprises a fixing plate and a mandrel, and has the main functions of inspecting mounting holes drilled in a positioning flange when the flange is mechanically machined after the left flange and the right flange of a radiator are positioned and welded, and coordinating and ensuring the mutual position size relationship between the flange and a nozzle of the radiator.
The positioning underframe assembly 1, the connecting bracket assembly 2, the compactor assembly 3, the nozzle positioner assembly 4, the switching positioning plate assembly 5 and the inspection mandrel 6 in the welding inspection fixture for the aluminum plate-fin radiator are assembled together according to the following structures:
1. mounting the connecting bracket assembly 2 on the positioning underframe assembly 1;
2. mounting the impactor assembly 3 on the connecting bracket assembly 2;
3. mounting the nozzle positioner assembly 4 on the articulate support assembly 2;
4. installing the switching positioning plate assembly 5 on the connecting bracket assembly 2;
5. finally, the checking mandrel 6 is arranged on the connecting bracket component 2; (wherein the switching positioning plate component 5 and the inspection core shaft 6 are detachable components, the switching positioning plate component 5 is used for positioning and clamping when machining allowance is left on the left and right flange plates of the product, and the inspection core shaft 6 is used for inspecting and positioning the left and right flange plates after positioning and welding and after machining)
6. And (3) placing the product on an aluminum plate-fin radiator welding inspection fixture for positioning, and then detecting the coaxiality of the product by using an inspection mandrel 6.
The inspection method of the welding inspection fixture for the aluminum plate-fin radiator comprises the following steps:
1. firstly, detaching the adapter positioning plate assembly 5 from the clamp, installing an air inlet and outlet flange of the radiator into the clamp adapter positioning plate assembly 5, and clamping a flange plate of the radiator by using a pressing plate 54 on the clamp (note: machining allowance is reserved on the appearance and the end face of the flange plate of the radiator, and a reserved hole is not drilled on the flange plate);
2. secondly, a core assembly of the radiator is arranged on the fixture positioning underframe assembly 1, the core assembly is initially coordinated and positioned by an adjusting screw 13, and the compactor assembly 3 is used for initial compaction and limiting;
3. thirdly, mounting a switching positioning plate assembly 5 with a flange plate of the radiator (the flange plate has machining allowance) on the connecting support assembly 2, adjusting the mutual position relation between a core assembly of the radiator and the flange plate, well repairing and matching, and preliminarily locking and limiting;
4. fourthly, mounting the valve seat of the radiator on the nozzle positioner component 4, adjusting and positioning to achieve preliminary locking and limiting (attention is paid to the fact that welding shrinkage gaskets are added on the bottom surfaces of the first positioning plate 41 and the second positioning plate 46 of the clamp, and the gaskets are determined according to actual requirements), then repairing the supporting plate of the radiator, and positioning the supporting plate of the radiator by using a limiting shaft pin 44 to achieve preliminary locking and limiting;
5. fifthly, adjusting the gap of the welding butt seam according to the welding process requirement, adjusting and assembling the size according to the process regulation requirement, finely adjusting an adjusting screw rod 13, coordinating the mutual position relation of a core component of the radiator, an air inlet and outlet flange and a valve seat, re-compressing and limiting a compressor component 3, re-locking and limiting a switching positioning plate component 5 on a connecting bracket component 2, and positioning and locking a nozzle positioner component 4 on the valve seat and a supporting plate of the radiator;
6. sixthly, machining after welding the air inlet and outlet flanges of the radiator according to the requirement of the process specification, mounting the radiator with the processed flange plate appearance, end plane and flange connecting hole into a plate-fin radiator welding inspection clamp for positioning, and detecting the coaxiality of the product by using an inspection mandrel 6;
7. checking and accepting the requirements of the mutual position relationship, shape and position sizes between the flange plate and the nozzle of the radiator according to the process requirements and the drawing requirements;
8. and (4) unloading the product which is subjected to assembly insistence from the clamp, and cleaning and checking.
Claims (2)
1. A welding inspection method for an aluminum plate-fin radiator is characterized by comprising the following steps: the adopted welding inspection fixture comprises a positioning underframe assembly (1),
the upper end of the positioning underframe assembly (1) is connected with the connecting support assembly (2), and the positioning underframe assembly (1) is provided with an adjusting and limiting structure for the radiator core in the up-and-down direction;
the positioning underframe assembly (1) comprises an installation floor (11), the upper end face of the installation floor (11) is in threaded connection with a plurality of adjusting screws (13) perpendicular to the upper end face of the installation floor (11), and hexagonal nuts (12) are arranged between the adjusting screws (13) and the installation floor (11);
the left end and the right end of the connecting bracket component (2) are respectively connected with the compactor component (3), the upper end of the connecting bracket component is connected with the nozzle positioner component (4), and the front end and the rear end of the connecting bracket component are detachably connected with the switching positioning plate component (5) or the inspection mandrel (6);
the connecting bracket assembly (2) comprises a pair of positioning angle plates (21) which are arranged at intervals, and the upper ends of the two positioning angle plates (21) are connected through a connecting flat plate (22); square holes are formed in the positioning angle plate (21) and the connecting flat plate (22);
the compactor component (3) is used for compacting and positioning the left side and the right side of the radiator core;
the compactor assembly (3) comprises a connecting vertical plate (31) connected with the connecting support assembly (2), a compaction screw (33) is perpendicular to the connecting vertical plate (31) and is in threaded connection with the connecting vertical plate (31), one end of the compaction screw (33) is connected with a cylindrical pin (34), and the other end of the compaction screw is connected with a smooth surface pressing block (32) with a smooth and flat end surface;
the nozzle positioner assembly (4) is used for positioning the radiator nozzle and the cylinder reinforcing angle plate;
the nozzle positioner assembly (4) comprises a first positioning plate (41) and a second positioning plate (46) which are connected with the upper end of the connecting bracket assembly (2); the first positioning plate (41) and the second positioning plate (46) are respectively connected with a positioning shaft pin (42), and the tail end of the positioning shaft pin (42) is provided with a transfer nozzle (43); the first positioning plate (41) is also in threaded connection with a knurled flat-head screw (45) for pressing the positioning shaft pin (42); the second positioning plate (46) is also provided with a limit shaft pin (44) and a knurled flat head screw (45) which is respectively used for compressing the positioning shaft pin (42) and the limit shaft pin (44); the axes of the positioning shaft pins (42) on the first positioning plate (41) and the second positioning plate (46) are collinear and are parallel to the axis of the limiting shaft pin (44);
the switching positioning plate assembly (5) is used for positioning and clamping when machining allowance is left on left and right flange plates of an air inlet and an air outlet of a radiator;
the transfer positioning plate assembly (5) comprises a positioning welding shaft pin (51) and a positioning pressing sleeve (52), and the positioning welding shaft pin (51) and the positioning pressing sleeve (52) are movably connected to the outer side of the transfer positioning plate (56); the inner side of the switching positioning plate (56) is connected with a threaded pressing sleeve (53), a pressing plate (54) and an inner hexagon screw (55);
the inspection mandrel (6) is used for positioning inspection after the left flange plate and the right flange plate of the air inlet and the air outlet of the radiator are positioned, welded and machined;
the inspection mandrel (6) comprises a fixed plate, and a mandrel is movably connected to the fixed plate;
the inspection method comprises the following steps:
step one, dismounting the switching positioning plate assembly (5) from the clamp, mounting an air inlet and outlet flange of the radiator into the switching positioning plate assembly (5) of the clamp, and clamping a flange plate of the radiator by using a pressing plate (54) on the clamp;
secondly, a core assembly of the radiator is arranged on a fixture positioning underframe assembly (1), the core assembly is initially coordinated and positioned by an adjusting screw rod (13), and the core assembly is initially pressed and limited by a presser assembly (3);
step three, installing the switching positioning plate assembly (5) provided with the flange plate with the machining allowance and the radiator on the connecting support assembly (2), adjusting the mutual position relation between the radiator core assembly and the flange plate, well repairing and matching, and preliminarily locking and limiting;
step four, installing the valve seat of the radiator on the nozzle positioner assembly (4), adjusting and positioning to perform primary locking and limiting, then repairing the supporting plate of the radiator, positioning the supporting plate of the product part by using a limiting shaft pin (44), and performing primary locking and limiting;
adjusting the coordination welding butt seam clearance according to the welding process requirement, adjusting and assembling the size according to the process specification requirement, finely adjusting an adjusting screw rod (13), coordinating the mutual position relation of a core component of the radiator and an air inlet and outlet flange and a valve seat, re-compressing and limiting a compressor component (3), re-locking and limiting a switching positioning plate component (5) on a connecting support component (2), and positioning and locking a nozzle positioner component (4) to the valve seat and a support plate of the radiator;
step six, welding an air inlet and outlet flange of the radiator according to the requirement of the process specification, then machining, putting the product with the processed flange plate appearance, end plane and flange connecting hole into an inspection clamp again for positioning, and detecting the coaxiality of the product by using an inspection mandrel (6);
step seven, checking the requirements of the mutual position relationship, shape and position sizes between the flange plate of the radiator and the pipe nozzle according to the process requirements and the drawing requirements;
and step eight, unloading the product which is subjected to assembly inspection from the clamp, and cleaning and inspecting.
2. The method for inspecting the soldering of an aluminum plate-fin heat sink as recited in claim 1, wherein: in the fourth step, welding shrinkage gaskets are added on the bottom surfaces of the first positioning plate (41) and the second positioning plate (46) of the nozzle positioning device assembly (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910335284.2A CN110142704B (en) | 2019-04-24 | 2019-04-24 | Welding inspection method for aluminum plate-fin radiator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910335284.2A CN110142704B (en) | 2019-04-24 | 2019-04-24 | Welding inspection method for aluminum plate-fin radiator |
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| CN110142704A CN110142704A (en) | 2019-08-20 |
| CN110142704B true CN110142704B (en) | 2021-02-12 |
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| CN201910335284.2A Active CN110142704B (en) | 2019-04-24 | 2019-04-24 | Welding inspection method for aluminum plate-fin radiator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111702376B (en) * | 2020-06-18 | 2022-02-22 | 贵州永红航空机械有限责任公司 | Control method for ensuring multi-interface size after welding of aviation radiator |
| CN114406395A (en) * | 2022-03-02 | 2022-04-29 | 襄阳博毅远图机械有限公司 | Clamp for high-temperature brazing of core body of stainless steel plate fin type heat exchanger |
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| CN110142704A (en) | 2019-08-20 |
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