CN107498129B - Copper brazing method for fuel distribution pipe - Google Patents
Copper brazing method for fuel distribution pipe Download PDFInfo
- Publication number
- CN107498129B CN107498129B CN201710913609.1A CN201710913609A CN107498129B CN 107498129 B CN107498129 B CN 107498129B CN 201710913609 A CN201710913609 A CN 201710913609A CN 107498129 B CN107498129 B CN 107498129B
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- CN
- China
- Prior art keywords
- fuel distribution
- copper
- distribution pipe
- pipe body
- sensor seat
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0006—Exothermic brazing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/12—Copper or alloys thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fuel-Injection Apparatus (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The invention discloses a copper brazing method of a fuel distribution pipe, wherein the fuel distribution pipe comprises a fuel distribution pipe body, a sensor seat, a pipe joint, a support block and an end cover matched with the end part of the fuel distribution pipe body, and is characterized by comprising the following steps: 1) firstly, pressing a copper ring into each of two ends of a fuel distribution pipe body through a press-fitting machine, and then pressing an end cover into the end part of the fuel distribution pipe body; 2) the assembly surfaces of the sensor seat, the pipe joint, the support block and the fuel distribution pipe body are all arc surfaces, counter bores are formed in the arc surfaces, copper cement is placed in the counter bores in advance, and then the sensor seat, the pipe joint and the support block are preassembled on the fuel distribution pipe body through laser welding or argon arc welding. The invention can ensure the filling fullness and reliability of the filling by promoting the filling of the built-in copper material after melting, effectively solve the stability problem of copper brazing, reduce the leakage rate of the product, further improve the product quality and achieve the purpose of reducing the cost.
Description
Technical Field
The invention belongs to the technical field of brazing, and relates to a copper brazing method for a fuel distribution pipe.
Background
Brazing is a widely used method of joining and sealing stainless steel structural members, particularly for fuel distribution pipes. The automobile fuel pipeline is a safety part of an automobile engine, and has very high requirements on the connection strength and the sealing effect between parts. At present, the fuel distribution pipe is usually brazed by adopting a preset brazing filler metal mode, wherein copper cement is preset on the outer side of a gap generated by part assembly, the fullness degree of copper brazing is detected through appearance after brazing, and the tightness of a brazed product is detected through watertight or helium; the mode of presetting copper glue outside the part can't guarantee that the brazing surface of the inside between the parts is full of copper material in the brazing process, the reliability is poor, subsequently derive the mode of placing the copper ring inside the part to braze, but because the melted copper material can't effectively flow out from the counter bore, can also cause gap filling to be not full, and the present inspection mode can't detect the filling condition of the inside copper of the part brazing arc surface, consequently can reduce the quality of product and increase the disability rate of product, improve the manufacturing cost of product.
Disclosure of Invention
The invention aims to provide a copper brazing method for a fuel oil distribution pipe, aiming at overcoming the defects in the prior art, and the method is used for solving the stability problem of copper brazing and reducing the leakage rate of a product by promoting the filling of a built-in copper material after melting and ensuring the fullness and reliability of the filling of the built-in copper material, thereby achieving the purposes of improving the quality of the product and reducing the cost.
In order to solve the technical problems, the invention adopts the following technical scheme:
a copper brazing method for a fuel distribution pipe comprises the steps of:
1) firstly, pressing a copper ring into each of two ends of a fuel distribution pipe body through a press-fitting machine, and then pressing an end cover into the end part of the fuel distribution pipe body;
2) the assembling surfaces of the sensor seat, the pipe joint, the support block and the fuel distributing pipe body are all arc surfaces, counter bores are arranged at the positions of the arc surfaces, copper cement is placed in the counter bores in advance, and then the sensor seat, the pipe joint and the support block are preassembled on the fuel distributing pipe body by laser welding or argon arc welding;
3) the fuel distributing pipe which is pre-assembled is arranged on a special bracket matched with the fuel distributing pipe and then is sent into a furnace for brazing, so that copper cement in each counter bore is melted, and gaps among a sensor seat, a pipe joint, a bracket block and a fuel distributing pipe body are correspondingly filled under the action of capillary force and gravity; and then the molten copper enters a cooling section, and the sensor seat, the pipe joint, the support block and the fuel distribution pipe body are fully connected and sealed due to solidification and cooling of the molten copper and the formation of a soldered joint through interaction with the base body, so that copper soldering of the fuel distribution pipe is completed.
Further, in the step 1), the copper ring is firstly pressed into the fuel distribution pipe body preliminarily, and when the end cover is pressed, the copper ring is pushed by the end cover and is finally pressed into the fuel distribution pipe body, so that the end cover is tightly attached to the copper ring; the end part of the fuel distributing pipe body is in interference fit with the end cover.
Further, in the step 2), the arc surfaces of the sensor seat, the pipe joint and the support block are provided with criss-cross grains, and the surface roughness Ra value is 6.3-50, so that the wettability and the capillary force of the arc surfaces during brazing are ensured.
Further, in the step 2), two or more counter bores are arranged on the arc surfaces of the sensor seat, the pipe joint and the support block, and at least one of the counter bores is a through hole and is used as an oil passage.
Further, in the step 2), when copper cement is preset in the counter bores of the sensor seat, the pipe joint and the support block, the copper cement is ensured not to completely cover the counter bore serving as an oil passage so as to avoid blockage or enable copper liquid to be dispersed to a sealing conical surface at the other end of the counter bore; when the sensor seat, the pipe joint, the support block and the fuel distribution pipe body are preassembled by laser welding or argon arc welding, welding spots are symmetrically distributed and respectively provided with at least 2 welding spots, and the welding spots are in the form of spot welding or linear seam welding.
Further, in step 3), the special bracket comprises a base, the base is provided with a plurality of support plates distributed along the length direction of the base, and the upper parts of the support plates are W-shaped.
The invention has the beneficial effects that:
1. the invention can well promote the joint filling of the built-in copper adhesive after melting, and can ensure the plumpness and reliability of the joint filling of the copper liquid;
2. the invention can well solve the stability problem of copper brazing, reduce the leakage rate of products, improve the quality and safety performance of the products and reduce the cost, and is particularly suitable for the copper brazing process of fuel distribution pipes.
Drawings
FIG. 1 is a diagram illustrating the effect of the present invention.
Fig. 2 is a schematic view of the internal structure of the pipe joint.
Fig. 3 is a schematic plan view of the arc surface in fig. 2.
Fig. 4 is a schematic view of the internal structure of the stent block.
Fig. 5 is a schematic view of brazing at a bracket block.
Fig. 6 is a schematic view of the internal structure of the sensor receptacle.
In the figure: 1-a fuel distribution pipe body, 2-a pipe joint, 21-a pipe joint arc surface, 22-a pipe joint first counter bore, 23-a pipe joint second counter bore, 24-a pipe joint arc surface pattern, 3-an end cover, 4-a support block, 41-a support block arc surface, 42-a support block counter bore, 5-a sensor seat, 51-a sensor seat arc surface, 52-a sensor seat counter bore, 6-a special bracket, 7-copper adhesive and 8-welding spots.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1 to 6, the invention discloses a copper brazing method for a fuel distribution pipe, the fuel distribution pipe comprises a fuel distribution pipe body 1, a sensor seat 5, a pipe joint 2, a support block 4 and an end cover 3 matched with the end of the fuel distribution pipe body 1, and the copper brazing method is characterized by comprising the following steps:
1) firstly, pressing a copper ring into each of two ends of a fuel distribution pipe body 1 through a press-fitting machine, and then pressing an end cover 3 into the end part of the fuel distribution pipe body 1;
2) the assembling surfaces of the sensor seat 5, the pipe joint 2, the support block 4 and the fuel distributing pipe body 1 are all arc surfaces, counter bores are formed in the arc surfaces, copper cement is placed in the counter bores in advance, and then the sensor seat 5, the pipe joint 2 and the support block 4 are preassembled on the fuel distributing pipe body through laser welding or argon arc welding; the pipe joint 2 is provided with a pipe joint arc surface 21, and a pipe joint counter bore is arranged at the pipe joint arc surface 21; the support block 4 is provided with a support block arc surface 41, and a support block counter bore 42 is arranged at the support block arc surface 41; the sensor seat 5 is provided with a sensor seat arc surface 51, and a sensor seat counter bore is arranged at the sensor seat arc surface 5;
3) the fuel distributing pipe which is pre-assembled is arranged on a special bracket 6 which is matched with the fuel distributing pipe and then is sent into a furnace for brazing, so that copper cement in each counter bore is melted, and gaps among the sensor seat 5, the pipe joint 2, the bracket block 4 and the fuel distributing pipe body 1 are correspondingly filled under the action of capillary force and gravity; and then the molten copper enters a cooling section, and the sensor seat 5, the pipe joint 2, the support block 4 and the fuel distribution pipe body 1 are fully connected and sealed due to solidification and cooling of the molten copper and the mutual action of the molten copper and the base body to form a soldered joint, so that the copper soldering of the fuel distribution pipe is completed.
As a preferred scheme, in the step 1), firstly, the copper ring is preliminarily pressed into the fuel distribution pipe body, when the end cover is pressed, the copper ring is pushed by the end cover and finally pressed into the fuel distribution pipe body, so that the end cover is tightly attached to the copper ring, and molten copper liquid is close to a gap of an assembly surface during brazing; the end part of the fuel distributing pipe body 1 is in interference fit with the end cover 2.
Preferably, in the step 2), the arc surfaces of the sensor seat 5, the pipe joint 2 and the bracket block 4 are provided with criss-cross grains, and the surface roughness Ra value is 6.3-50, so as to ensure the wettability and capillary force of the respective arc surfaces during brazing. Taking the pipe joint 2 as an example, please refer to fig. 2 and 3, the pipe joint arc surface 21 of the pipe joint 2 has criss-cross pipe joint arc surface lines 24.
Preferably, in step 2), two or more counter bores are arranged on the circular arc surfaces of the sensor seat 5, the pipe joint 2 and the support block 4, and at least one of the counter bores is a through hole and is used as an oil passage. Also taking the pipe joint 2 as an example, please refer to fig. 2 and 3, a pipe joint first counterbore 22 and a pipe joint second counterbore 23 are arranged at a pipe joint arc surface 21 of the pipe joint 2, and one of them is a through hole.
As a preferred scheme, in the step 2), when copper cement is preset in the counter bores of the sensor seat 5, the pipe joint 2 and the support block 4, the copper cement is ensured not to completely cover the counter bore (namely the counter bore with the through hole) used as an oil passage, so as to avoid blocking or enable copper liquid to be dispersed to a sealing conical surface at the other end of the counter bore; when the sensor seat 5, the pipe joint 2, the support block 4 and the fuel distribution pipe body 1 are preassembled by laser welding or argon arc welding, the welding spots are symmetrically distributed and respectively provided with at least 2 welding spots, and the welding spots are in the form of spot welding or linear seam welding. Taking the bracket block 4 as an example, please refer to fig. 4 and 5, when the bracket block 4 is pre-assembled with the fuel distribution pipe body 1, the counter bore of the bracket block is internally provided with a pre-arranged copper adhesive 7, and is primarily fixed with the fuel distribution pipe body 1 through two symmetrical welding spots 8.
Preferably, in step 3), the special bracket 6 includes a base having a plurality of support plates distributed along a length direction thereof, and an upper portion of each support plate is W-shaped. The special bracket ensures that the axial directions of the counter bores of the support block, the sensor seat and the pipe joint are at least parallel to the horizontal plane, and if the front ends of the counter bores are upward, the effect is optimal, so that the action of gravity can be fully utilized, molten copper can be promoted to flow to gaps of corresponding assembly surfaces, and the sensor seat, the pipe joint, the support block and the fuel distribution pipe body are fully connected and sealed.
The above description and application of the present invention are illustrative, and are not intended to limit the scope of the invention to the above embodiments. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the invention.
Claims (4)
1. A copper brazing method for a fuel distribution pipe comprises the steps of:
1) firstly, pressing a copper ring into each of two ends of a fuel distribution pipe body through a press-fitting machine, and then pressing an end cover into the end part of the fuel distribution pipe body;
2) the assembling surfaces of the sensor seat, the pipe joint, the support block and the fuel distributing pipe body are all arc surfaces, counter bores are arranged at the positions of the arc surfaces, copper cement is placed in the counter bores in advance, and then the sensor seat, the pipe joint and the support block are preassembled on the fuel distributing pipe body by laser welding or argon arc welding;
3) the fuel distributing pipe which is pre-assembled is arranged on a special bracket matched with the fuel distributing pipe and then is sent into a furnace for brazing, so that copper cement in each counter bore is melted, and gaps among a sensor seat, a pipe joint, a bracket block and a fuel distributing pipe body are correspondingly filled under the action of capillary force and gravity; then the molten copper enters a cooling section, and the sensor seat, the pipe joint, the support block and the fuel distribution pipe body are fully connected and sealed due to solidification and cooling of the molten copper and the formation of a soldered joint by interaction of the molten copper and the matrix, so that copper soldering of the fuel distribution pipe is completed;
in the step 2), the arc surfaces of the sensor seat, the pipe joint and the support block are provided with criss-cross grains, and the surface roughness Ra value is 6.3-50, so that the wettability and the capillary force of the arc surfaces during brazing are ensured;
in the step 3), the special bracket comprises a base, wherein a plurality of supporting plates distributed along the length direction of the base are arranged on the base, and the upper parts of the supporting plates are W-shaped; the special bracket ensures that the axial directions of the counter bores of the bracket block, the sensor seat and the pipe joint are at least parallel to the horizontal plane, so that the front end of each counter bore faces upwards, the action of gravity is fully utilized, the molten copper is promoted to flow to the gap of the corresponding assembly surface, and the sensor seat, the pipe joint, the bracket block and the fuel distribution pipe body are fully connected and sealed.
2. The method of brazing a fuel distribution tube according to claim 1, wherein: in the step 1), firstly, preliminarily pressing the copper ring into the fuel distribution pipe body, and when the copper ring is pressed into the end cover, the copper ring is pushed by the end cover and finally pressed into the fuel distribution pipe body so as to ensure that the end cover is tightly attached to the copper ring; the end part of the fuel distributing pipe body is in interference fit with the end cover.
3. The method of brazing a fuel distribution tube according to claim 1, wherein: in the step 2), more than two counter bores are arranged on the arc surfaces of the sensor seat, the pipe joint and the support block, and at least one counter bore is a through hole and is used as an oil passage.
4. A method of brazing a fuel distribution pipe according to claim 3, wherein: in the step 2), when copper cement is preset in counter bores of the sensor seat, the pipe joint and the support block, the copper cement is ensured not to completely cover the counter bore serving as an oil passage so as to avoid blockage or enable copper liquid to be dispersed to a sealing conical surface at the other end of the counter bore; when the sensor seat, the pipe joint, the support block and the fuel distribution pipe body are preassembled by laser welding or argon arc welding, welding spots are symmetrically distributed and respectively provided with at least 2 welding spots, and the welding spots are in the form of spot welding or linear seam welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710913609.1A CN107498129B (en) | 2017-09-30 | 2017-09-30 | Copper brazing method for fuel distribution pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710913609.1A CN107498129B (en) | 2017-09-30 | 2017-09-30 | Copper brazing method for fuel distribution pipe |
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| Publication Number | Publication Date |
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| CN107498129A CN107498129A (en) | 2017-12-22 |
| CN107498129B true CN107498129B (en) | 2019-12-27 |
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| CN201710913609.1A Active CN107498129B (en) | 2017-09-30 | 2017-09-30 | Copper brazing method for fuel distribution pipe |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109986200A (en) * | 2017-12-29 | 2019-07-09 | 无锡威孚施密特动力系统零部件有限公司 | A kind of stainless steel braze-welded structure in-cylinder direct-jet high pressure oil rail manufacturing process |
| CN110181213B (en) * | 2019-05-30 | 2020-12-22 | 上海威克迈龙川汽车发动机零件有限公司 | Welding assembly fixture for dual-positioning type high-pressure fuel distribution pipe |
| CN114083088B (en) * | 2021-12-03 | 2023-02-24 | 赛沃智造(上海)科技有限公司 | High-pressure oil rail argon arc welding assembly and manufacturing method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000033474A (en) * | 1998-07-22 | 2000-02-02 | Nippon Light Metal Co Ltd | Manufacture of fluid distribution pipe |
| CN101846020B (en) * | 2010-04-15 | 2012-03-21 | 联合汽车电子有限公司 | Internal airbag pressure stabilizer, method for producing same and method for producing fuel distribution pipe |
| US9849533B2 (en) * | 2013-05-30 | 2017-12-26 | General Electric Company | Hybrid diffusion-brazing process and hybrid diffusion-brazed article |
| CN104625278A (en) * | 2013-11-12 | 2015-05-20 | 联合汽车电子有限公司 | Method for manufacturing products by cast components through copper brazing |
| CN106424999A (en) * | 2016-10-31 | 2017-02-22 | 联合汽车电子有限公司 | Copper brazing manufacturing method of fuel distribution pipe and radial connecting part of main pipe |
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Address after: 201112 No. 96, Jiangchao Road, Minhang District, Shanghai Patentee after: Saiwo Zhizao (Shanghai) Technology Co.,Ltd. Address before: No.20196 minchao Road, Pujiang Town, Shanghai Patentee before: SHANGHAI WINKELMANN LONGCHUAN (SWL) MOTORCOMPONENTS Co.,Ltd. |
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