CN116197612A - Quick connector for brazing tool and manufacturing method thereof - Google Patents
Quick connector for brazing tool and manufacturing method thereof Download PDFInfo
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- CN116197612A CN116197612A CN202211688676.5A CN202211688676A CN116197612A CN 116197612 A CN116197612 A CN 116197612A CN 202211688676 A CN202211688676 A CN 202211688676A CN 116197612 A CN116197612 A CN 116197612A
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- blind hole
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000005219 brazing Methods 0.000 title claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 44
- 239000010959 steel Substances 0.000 claims description 44
- 238000005553 drilling Methods 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 238000005242 forging Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 238000000137 annealing Methods 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 8
- 238000003754 machining Methods 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 7
- 230000003746 surface roughness Effects 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000010923 batch production Methods 0.000 abstract description 3
- 239000011435 rock Substances 0.000 description 17
- 239000010936 titanium Substances 0.000 description 8
- 229910001566 austenite Inorganic materials 0.000 description 7
- 239000010955 niobium Substances 0.000 description 6
- 239000011572 manganese Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 229910052788 barium Inorganic materials 0.000 description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- XEWDGUOIXXJVTA-UHFFFAOYSA-N manganese niobium Chemical compound [Mn].[Mn].[Nb] XEWDGUOIXXJVTA-UHFFFAOYSA-N 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Drilling Tools (AREA)
Abstract
The invention discloses a quick connector of a drill tool and a manufacturing method thereof. By utilizing the manufacturing method of the invention, the length of the quick connector can be increased or reduced according to the requirements of users, thereby achieving the purpose of producing different drills; meanwhile, the quick connector with various internal thread structural forms can be produced, and the matching connection with different external thread drill tails is realized; meanwhile, the size of the quick connector is smaller than that of the whole drill tool, so that the large-scale occupation of the production field is reduced. The invention can be used for manufacturing the quick connector of the drill tool independently, can realize batch production and quick connection operation of a plurality of drill rods, and simultaneously, when the drill rods are broken, the quick connector can be quickly replaced, thereby reducing the waste of cost and improving the working efficiency.
Description
Technical Field
The invention relates to the technical field of rock drilling tools, in particular to a quick connector of a drilling tool and a manufacturing method thereof.
Background
The drill tool is mainly used for a rock drill, and the rock drill mainly comprises an impact mechanism, a rotation mechanism, a water supply and powder discharge device, a dust prevention system and the like. The rock drilling operation is the combination of the functions of impact, rotation, propulsion and rock hole flushing, and the rock drilling drill rod can be used for drilling rock rope hole, rod hole milling, blasting hole, grouting hole and the like in the engineering of railway, highway, river channel, hydropower construction and the like; under the normal condition, the rock drilling rod is used as a capacity transmission medium in the actual use process, belongs to the class of consumers, and if the rod breaking phenomenon occurs, the construction can be continued only by replacing a new drill rod, and other remedial measures are not needed temporarily, so that the cost waste is caused, and the working progress is also delayed.
The shallow hole rock drill rod is commonly called as a small drill rod, and is made of hollow steel, and for rock drilling operation with the rock hole depth below 8000mm, a single drill rod drilling mode is mostly adopted; the screw thread connection drill rod for medium-depth rock drilling, commonly called as large drill rod, is used for rock drilling operation with the depth of more than 8000mm, and must be carried out in a mode of connecting a plurality of drill rods. In order to solve the connection structure of a plurality of drill rods, screw threads are conveniently manufactured at two ends of the drill rods. However, in the machining process of the rock drilling rod, only the thread parts at the two ends are required to be machined, the middle rod body is not required to be machined, the length ratio of the thread parts is very small in the whole length of the rock drilling rod, and the requirement on machining equipment is high because the thread parts are machined together with middle clamping; secondly, the rock drilling rod and threads at two ends are integrated, and each machining process occupies a large machining site.
Disclosure of Invention
The invention aims to provide a quick connector for a drill tool and a manufacturing method thereof, and the manufactured quick connector can be used for connecting a plurality of drill rods quickly, and meanwhile, when the drill rods are broken, the quick connector can be replaced quickly, so that the cost waste is reduced, and the working efficiency is improved.
The technical scheme adopted by the invention for achieving the purpose is as follows: a manufacturing method of a drill tool quick connector comprises the following steps:
s1, selecting round steel, cutting and blanking by a sawing machine according to a specified geometric dimension, and turning two ends of the round steel to be flat and perpendicular to a middle axis so that the roughness Ra of the end face is 3.2 mu m;
s2, drilling a blind hole along the connecting end A of the round steel in the direction of the central shaft, wherein the deviation of the length of the blind hole is not more than 2mm; drilling a through hole communicated with the blind hole along the end B of the round steel connecting end;
s3, turning the shape of the outer peripheral surface of the round steel;
s4, roughly turning an inner hole at the bottom of the blind hole, wherein the dimension deviation of the inner hole is not more than 0.3mm, and then machining a trapezoid inner thread on the inner wall of the blind hole, wherein the length of the trapezoid inner thread along the axial direction of the round steel is less than 50% of the total length of the round steel.
In the step S3 of the invention, the whole appearance of the round steel is firstly turned, the deviation of the outer diameter dimension of the round steel is not more than 0.2mm, the surface roughness Ra is 3.2 mu m, then at the end B of the round steel connection end, the turning section I and the section II with the outer diameter smaller than the outer diameter of the turning section I are connected through arc transition, and the section II and the end A of the connection end are connected through arc transition.
The round steel in the step S1 is formed by forging, rolling and annealing after being mixed and smelted by the following components in percentage by mass: 0.1-0.25% of C, 0.5-1.3% of Si, 2.0-2.5% of Mn, 0.1-0.2% of Cr, 0.02-0.08% of Ti, 0.05-0.08% of Ba, 1.0-1.2% of Mo, 0.01-0.04% of Al, 0.05-0.08% of Nb, 0.001-0.003% of Re, and the balance of iron and unavoidable impurities.
Preferably, the round steel in the step S1 is formed by forging, rolling and annealing after being mixed and smelted by the following components in percentage by mass: 0.1-0.15% of C, 0.5-0.9% of Si, 2.0-2.1% of Mn, 0.1-0.2% of Cr, 0.02-0.03% of Ti, 0.07-0.08% of Ba, 1.0-1.1% of Mo, 0.03-0.04% of Al, 0.06-0.08% of Nb, 0.001-0.002% of Re, and the balance of iron and unavoidable impurities.
In the present invention, impurities include: s is less than or equal to 0.03 percent, O is less than or equal to 0.03 percent, and N is less than or equal to 0.004 percent.
Preferably, the forging temperature is 1050-1100 ℃, and the annealing temperature is 850-900 ℃.
The invention also provides a quick connector of the drill tool, when in use, the end B of the connecting end and the drill rod are welded into a whole through a friction welding process, and the end A of the connecting end is connected with the drill rod tail through threads and then subjected to integral carburization treatment. The proportion content of barium is favorable for fine grains and strengthens the pinning effect on austenite grains, thereby improving the toughness of a welding area and facilitating the welding of a quick connector and a drill rod.
By utilizing the manufacturing method of the invention, the length of the quick connector can be increased or reduced according to the requirements of users, thereby achieving the purpose of producing different drills; meanwhile, the quick connector with various internal thread structural forms can be produced, and the matching connection with different external thread drill tails is realized; because the size of the quick connector is smaller than that of the whole drill tool, the large-scale occupation of the production field is reduced.
The invention can be used for manufacturing the quick connector of the drill tool independently, can realize batch production and quick connection operation of a plurality of drill rods, and simultaneously, when the drill rods are broken, the quick connector can be quickly replaced, thereby reducing the waste of cost and improving the working efficiency.
According to the invention, the round steel with high strength and high toughness is used for manufacturing the quick joint for the brazing tool, when the titanium nitride component in the round steel is too high, ferrite formation can be influenced, and the barium and aluminum contained in the round steel component can dissolve part of titanium nitride particles, so that the stability of the carbonitride in austenite is increased by the titanium nitride, the sedimentation tendency is reduced, the precipitated particles are finer, and the service life of the round steel is prolonged.
Drawings
FIG. 1 is a schematic process diagram of step one;
fig. 2 and 3 are schematic process diagrams of the second step;
FIG. 4 is a schematic process diagram of step three;
fig. 5 and 6 are schematic diagrams of the processing in the fourth step;
Detailed Description
The invention will now be described in further detail with reference to the drawings and examples.
The embodiments of the invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. The non-illustrated portions of the following examples of the present invention should be understood as techniques well known to those skilled in the art.
Example 1
A manufacturing method of a drill tool quick connector comprises the following steps:
firstly, selecting round steel, cutting and blanking by a sawing machine with a specified geometric dimension, turning two ends of the round steel to be flat and perpendicular to a middle axis, and enabling the end surface roughness Ra of the end A and the end B to be 3.2 mu m as shown in figure 1;
step two, drilling a phi 30mm blind hole along the connecting end A of the round steel in the direction of the central shaft, wherein the length of the blind hole is 85mm and the length deviation is not more than 2mm as shown in figure 2; as shown in fig. 3, a phi 13mm through hole communicated with the blind hole is drilled along the end B of the round steel connecting end;
turning the shape of the outer peripheral surface of the round steel;
and fourthly, roughly turning an inner hole at the bottom of the blind hole by the dimension marked in the figure 5, wherein the dimension deviation of the inner hole is not more than 0.3mm, and then machining a trapezoid inner thread on the inner wall of the blind hole, wherein the dimension marked in the figure 6 is that the length of the trapezoid inner thread along the axial direction of the round steel is less than 50% of the total length of the round steel.
In the third step, as shown in fig. 4, the whole shape of the round steel is turned first, so that the deviation of the outer diameter dimension of the round steel is not more than 0.2mm, the surface roughness Ra is 3.2 μm, then at the connecting end B of the round steel, the turning section I and the section II with the outer diameter smaller than that of the turning section I are connected through arc transition, and the section II and the connecting end A are connected through arc transition.
Wherein, section I external diameter phi 39.5mm, dimensional tolerance 0.3mm, section II and the arc length that both ends are connected are 55mm, section II external diameter phi 36mm, dimensional tolerance 0.2mm, two sections circular arcs are R20, section II length 30.45mm, the circular arc that is close to the B end passes through R5 circular arc transition with link B end, link B end length 97.8mm, external diameter phi 56mm, dimensional tolerance 0.2mm.
In the fourth step, when the processing is carried out according to fig. 5, a taper hole is processed on the inner hole wall of the end A of the connecting end, the taper angle is 60 degrees, the maximum outer diameter phi is 41mm, a wear-resistant lining body is arranged on the taper surface, and an aluminum layer and a nickel layer are sequentially sprayed outside the wear-resistant lining body. When the drill rod is used, the connecting end B and the drill rod are welded into a whole through a friction welding process, the connecting end A is connected with the drill rod tail through threads, the whole carburization treatment is carried out, the wear-resistant lining body of the conical surface can buffer swing impact in the rock drilling process after the connecting end A is connected with the drill rod tail through threads, the drill rod tail is supported, meanwhile, the spray coating has certain toughness, so that stress concentration disappears, the tensile strength of the whole drill rod is improved, the tensile strength of the whole drill rod can reach more than 1270MPa, and the impact toughness reaches 100J.
The above is a basic embodiment of the present invention, and further improvements, optimizations and limitations can be made on the above basis, so as to obtain the following embodiments:
example 2
This embodiment is further defined on the basis of embodiment 1, and has the same main structure as embodiment 1, and further defined in that:
the round steel in the first step is prepared by adopting the following components in percentage by mass through forging and rolling at 1090 ℃ and annealing at 900 ℃ after being mixed and smelted: 0.15% of C, 0.9% of Si, 2.1% of Mn, 0.2% of Cr, 0.03% of Ti, 0.08% of Ba, 1.1% of Mo, 0.03% of Al, 0.08% of Nb, 0.001% of Re, and the balance of iron and unavoidable impurities. Wherein Ti is sponge Ti with a thickness of more than 3 mm.
Wherein, during forging, forging is performed by adopting multiple fires, the deformation of the first forging is 140-200%, the deformation of the second forging is 110-150%, and the deformation of the third forging is 160-200%, so that forging stock with fine tissue can be obtained.
Iron and manganese niobium in the components can enlarge an austenite region, refine grains, reduce the decomposition speed of austenite, increase the quantity of residual austenite and improve the impact toughness and the welding performance; meanwhile, the non-oxide reinforcing phase is contained, so that the effect of pinning a grain boundary can be achieved; the carbon is selected as the compound carbon, so that the strength and the hardness of pig iron can be improved, silicon promotes the carbon in the pig iron to be separated into graphite, and the gas hole in a workpiece is reduced.
Meanwhile, due to the actions of niobium, titanium, barium and aluminum, the stability of the carbonitride in austenite is improved, the precipitation tendency is reduced, the precipitated particles are finer, and the service life of the round steel is prolonged. The invention also forms BaO-TiN composite precipitate, which effectively inhibits the growth of austenite grains; when the quick joint is connected with the drill rod through friction welding, acicular ferrite can be formed in a welding area, and toughness is improved.
Example 3
The round steel in the first step is formed by forging at 1100 ℃ and annealing at 870 ℃ after being mixed and smelted, and the round steel comprises the following components in percentage by mass: 0.20% of C, 1.3% of Si, 2.0% of Mn, 0.1% of Cr, 0.04% of Ti, 0.05% of Ba, 1.0% of Mo, 0.01% of Al, 0.06% of Nb, 0.003% of Re, and the balance of iron and unavoidable impurities.
Example 4
The round steel in the first step comprises the following components in percentage by mass: 0.1% of C, 0.6% of Si, 2.5% of Mn, 0.13% of Cr, 0.07% of Ti, 0.06% of Ba, 1.2% of Mo, 0.04% of Al, 0.05% of Nb, 0.002% of Re, and the balance of iron and unavoidable impurities.
By utilizing the manufacturing method of the invention, the length of the quick connector can be increased or reduced according to the requirements of users, thereby achieving the purpose of producing different drills; meanwhile, the quick connector with various internal thread structural forms can be produced, and the matching connection with different external thread drill tails is realized; because the size of the quick connector is smaller than that of the whole drill tool, the large-scale occupation of the production field is reduced; and can batch production, connect the operation with many drill rods fast, simultaneously, when the drill rod breaks, can quick replacement quick-operation joint, reduce the waste of cost, improve work efficiency.
It will be apparent to those skilled in the art that the present invention is not limited to the above-described exemplary embodiments, but can be embodied in other specific forms without departing from the spirit or essential characteristics thereof, and that changes, substitutions, modifications and variations can be made therein without departing from the spirit or essential characteristics of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims (6)
1. The manufacturing method of the quick connector of the brazing tool is characterized by comprising the following steps of:
s1, selecting round steel, cutting and blanking by a sawing machine according to a specified geometric dimension, and turning two ends of the round steel to be flat and perpendicular to a middle axis so that the roughness Ra of the end face is 3.2 mu m;
s2, drilling a blind hole along the connecting end A of the round steel in the direction of the central shaft, wherein the deviation of the length of the blind hole is not more than 2mm; drilling a through hole communicated with the blind hole along the end B of the round steel connecting end;
s3, turning the shape of the outer peripheral surface of the round steel;
s4, roughly turning an inner hole at the bottom of the blind hole, wherein the dimension deviation of the inner hole is not more than 0.3mm, and then machining a trapezoid inner thread on the inner wall of the blind hole, wherein the length of the trapezoid inner thread along the axial direction of the round steel is less than 50% of the total length of the round steel.
2. The method for manufacturing a quick connector for a drill tool according to claim 1, wherein in the step S3, the whole shape of the round steel is turned first, so that the deviation of the outer diameter dimension of the round steel is not more than 0.2mm, the surface roughness Ra is 3.2 μm, then at the end B of the round steel connection end, the turning section I and the section II with the outer diameter smaller than the outer diameter of the turning section I are connected through arc transition, and the section II and the end a of the connection end are connected through arc transition.
3. The method for manufacturing the quick connector for the drill tool, according to claim 1, wherein the round steel in the step S1 is formed by forging and annealing after being mixed and smelted by the following components in percentage by mass: 0.1-0.25% of C, 0.5-1.3% of Si, 2.0-2.5% of Mn, 0.1-0.2% of Cr, 0.02-0.08% of Ti, 0.05-0.08% of Ba, 1.0-1.2% of Mo, 0.01-0.04% of Al, 0.05-0.08% of Nb, 0.001-0.003% of Re, and the balance of iron and unavoidable impurities.
4. The method for manufacturing the quick connector for the drill tool, according to claim 1, wherein the round steel in the step S1 is formed by forging and annealing after being mixed and smelted by the following components in percentage by mass: 0.1-0.15% of C, 0.5-0.9% of Si, 2.0-2.1% of Mn, 0.1-0.2% of Cr, 0.02-0.03% of Ti, 0.07-0.08% of Ba, 1.0-1.1% of Mo, 0.03-0.04% of Al, 0.06-0.08% of Nb, 0.001-0.002% of Re, and the balance of iron and unavoidable impurities.
5. A method of manufacturing a drill quick connector according to claim 3 or 4, wherein the forging temperature is 1050-1100 ℃, and the annealing temperature is 850-900 ℃.
6. The quick connector for the brazing tool is characterized in that when in use, the end B of the connecting end is welded with a brazing rod into a whole through a friction welding process, and the end A of the connecting end is connected with a brazing shank through threads and then subjected to integral carburization treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211688676.5A CN116197612A (en) | 2022-12-28 | 2022-12-28 | Quick connector for brazing tool and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211688676.5A CN116197612A (en) | 2022-12-28 | 2022-12-28 | Quick connector for brazing tool and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116197612A true CN116197612A (en) | 2023-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211688676.5A Pending CN116197612A (en) | 2022-12-28 | 2022-12-28 | Quick connector for brazing tool and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116197612A (en) |
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2022
- 2022-12-28 CN CN202211688676.5A patent/CN116197612A/en active Pending
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