CN112207378A - Manufacturing method of oil injector seat positioning hole and high-pressure fuel oil distribution pipe - Google Patents
Manufacturing method of oil injector seat positioning hole and high-pressure fuel oil distribution pipe Download PDFInfo
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- CN112207378A CN112207378A CN202011052630.5A CN202011052630A CN112207378A CN 112207378 A CN112207378 A CN 112207378A CN 202011052630 A CN202011052630 A CN 202011052630A CN 112207378 A CN112207378 A CN 112207378A
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- electrolytic
- drill bit
- injector
- working area
- seat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
- B23H9/14—Making holes
- B23H9/16—Making holes using an electrolytic jet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
- B23H11/003—Mounting of workpieces, e.g. working-tables
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention provides a method for manufacturing a positioning hole of an oil injector seat, which is used for forming the positioning hole on the oil injector seat and comprises the following steps: providing an electrolytic drill bit; connecting the electrolytic drill bit with a cathode, and connecting the oil sprayer seat with an anode; and electrifying the electrolytic drill bit, keeping a set gap between the electrolytic drill bit and the working area of the oil sprayer seat, and spraying electrolyte to the working area by the electrolytic drill bit to form at least one positioning hole pair in the working area, wherein the positioning hole pair is used for suspending an oil sprayer. The positioning hole pair for suspending the oil injector is formed on the oil injector seat through an electrolytic machining process, so that the problem of interference caused by punching in the traditional machining process is solved. Based on this, this application still provides a high-pressure fuel distributing pipe, high-pressure fuel distributing pipe is the integrated into one piece structure, including a plurality of the injector seat has that structural strength is big, corrosion resistance is strong and the shape advantage such as changeable.
Description
Technical Field
The invention relates to the technical field of automobile engine part manufacturing, in particular to a manufacturing method of an oil sprayer seat positioning hole and a high-pressure fuel oil distribution pipe.
Background
The fuel distribution pipe, also called a fuel rail or an oil rail, is a component of a fuel injection system of a gasoline engine, and has the main function of providing sufficient fuel flow and uniformly distributing the fuel flow to the fuel injectors of each cylinder, and simultaneously realizing the installation and connection of each fuel injector. The suspended high-pressure fuel distribution pipe generally comprises a main fuel pipe, a plurality of fixed supports, a plurality of injector seats and the like, wherein the fixed supports are used for fixing the main fuel pipe on an engine cylinder body, and the injector seats are used for communicating the main fuel pipe with an injector to supply fuel to the injector. The oil injector seat is provided with a positioning hole for suspending an oil injector, the structures of a main oil pipe, a fixed support, the oil injector seat and the like are generally processed respectively, then the oil injector seat is drilled by utilizing machining equipment, and then the oil injector and the fixed support are welded on the main oil pipe through a brazing technology. The oil sprayer can be suspended by the positioning hole, so that a structure for fixing the oil sprayer on the engine cylinder body is avoided. However, the structural strength of the welded area of the suspension type high-pressure fuel distribution pipe manufactured by the brazing technology cannot meet the requirement of higher oil pressure, and is easily restricted by the use environment, and for the high-pressure fuel distribution pipe with the injector seat and the main oil pipe integrally formed, due to the interference problem, the positioning hole cannot be machined by the traditional machining method.
Disclosure of Invention
The invention aims to provide a method for manufacturing a positioning hole of an oil sprayer seat and a high-pressure fuel distribution pipe, wherein a positioning hole pair for suspending an oil sprayer is formed by an electrolytic machining process, and the problem of interference caused by traditional machining punching is solved.
In order to achieve the above object, the present invention provides a method for manufacturing an injector seat positioning hole, for forming a positioning hole in an injector seat, comprising:
providing an electrolytic drill bit;
connecting the electrolytic drill bit with a cathode, and connecting the oil sprayer seat with an anode;
and electrifying the electrolytic drill bit, keeping a set gap between the electrolytic drill bit and the working area of the oil sprayer seat, and spraying electrolyte to the working area by the electrolytic drill bit to form at least one positioning hole pair in the working area, wherein the positioning hole pair is used for suspending an oil sprayer.
Optionally, the injector seat includes a first side wall and a second side wall opposite to each other, each of the positioning hole pairs includes two positioning holes respectively disposed on the first side wall and the second side wall, a suspension ring is disposed at the top of the injector, and a positioning pin sequentially penetrates through the positioning holes of the first side wall, the suspension ring, and the positioning holes of the second side wall to suspend the injector.
Optionally, the step of energizing the electrolysis drill bit by using an inclined surface at the head of the electrolysis drill bit to maintain a set gap between the electrolysis drill bit and the working area of the injector seat, and injecting the electrolyte to the working area by using the electrolysis drill bit to form at least one positioning hole pair in the working area specifically includes:
adjusting an included angle between the inclined surface of the electrolytic drill bit and the normal of the working area to enable a gap between the head of the electrolytic drill bit and the working area to be uniform;
energizing the electrolytic drill bit to advance the electrolytic drill bit forward to a first sidewall through the injector seat to form a locating hole in the first sidewall;
and rotating the electrolytic drill bit by 180 degrees, and feeding the electrolytic drill bit forwards until a positioning hole on the second side wall is formed.
Optionally, the inclined surface is perpendicular to a normal of the working area.
Optionally, the difference between the maximum and minimum values of the clearance between the head of the electrolytic drill bit and the working area is no more than 1.5 mm.
Optionally, an inclined opening is arranged at the end of the electrolytic drill bit, an included angle between the inclined opening and the axis of the electrolytic drill bit is smaller than 90 °, and the electrolyte is sprayed out from the inclined opening.
Optionally, an angle between the oblique opening and a normal direction of the working area is not greater than 45 °.
Optionally, the set gap is between 0.1mm and 2 mm.
Based on this, this application still provides a high-pressure fuel distributing pipe, high-pressure fuel distributing pipe is the integrated into one piece structure, just high-pressure fuel distributing pipe includes a plurality of adoption the injector seat of manufacturing approach preparation of injector seat locating hole.
Alternatively, the positioning holes on a plurality of injector seats can be machined simultaneously.
According to the manufacturing method of the positioning hole of the oil sprayer seat, the positioning hole pair for suspending the oil sprayer is formed on the oil sprayer seat through an electrolytic machining process, so that the problem of interference caused by traditional machining punching is solved. Based on this, the application still provides a high-pressure fuel distributing pipe, high-pressure fuel distributing pipe is the integrated into one piece structure, including a plurality of adoption the injector seat of manufacturing approach preparation of injector seat locating hole, have that structural strength is big, corrosion resistance is strong and shape advantage such as changeable.
Drawings
FIG. 1 is a schematic view of a prior art suspended high pressure fuel distribution tube;
FIG. 2 is a step diagram of a method of manufacturing injector seat locating holes in accordance with an embodiment of the present invention;
FIG. 3 is a schematic illustration of the electrolytic processing of a high pressure fuel rail provided by an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an electrolytic drill bit according to an embodiment of the present invention;
FIGS. 5-7 are schematic illustrations of the processing of an electrolytic drill bit provided by an embodiment of the present invention;
FIG. 8 is a schematic structural view of a high pressure fuel distribution tube assembly according to an embodiment of the present invention;
wherein the reference numerals are:
10-a main oil pipe; 20-fixing a support; 30-an oil sprayer seat; 31-a positioning hole; 40-anti-rotation groove;
100-an oil sprayer seat; 110 — a work area; 120-normal to the working area; 200-an electrolytic drill bit; 210-inclined plane; 220-oblique opening; 300-oil injector; 400-main oil pipe; 500-fixing a support; 600-fixed pins; 700-anti-rotation groove;
a-an included angle between the inclined opening and the normal direction of the working area of the oil sprayer seat;
the angle between the beta-oblique opening and the axis of the electrolytic drill bit.
Detailed Description
As described in the background of the invention, with the technological progress of direct injection engines, high-pressure fuel distribution pipes are required to store and distribute fuel at higher oil pressure, and the tensile mechanical strength of the welded area of the suspended high-pressure fuel distribution pipe manufactured by brazing technology cannot meet the requirement of higher oil pressure, so that forged high-pressure fuel distribution pipes have appeared. The forged high-pressure fuel distribution pipe is formed by integrally forming a main fuel pipe, a fixed support, an injector seat and the like, and the connection strength among the main fuel pipe, the fixed support, the injector seat and the like is improved. However, in the case of the suspension type high-pressure fuel distribution pipe, when the injector seat is perforated in the axial direction of the main fuel pipe, the feed path of the cutter of the machining equipment is blocked due to the existence of the fixed support, and it is difficult to machine the positioning hole.
Specifically, referring to fig. 1, fig. 1 is a schematic diagram of a suspended high-pressure fuel distribution pipe in the prior art, where 10 is a main fuel pipe, 20 is a fixed support, and 30 is an injector seat. When the injector seat 30 needs to be punched, the machining equipment spindle interferes with the injector seat 30 and the fixed support 20, so that the feed path of the cutter is blocked by the fixed support 20, and a positioning hole on the injector seat 30 located between the two fixed supports 20 cannot be machined. Meanwhile, because the injector seat 30 is provided with other structures, such as the anti-rotation groove 40 for limiting the rotation of the injector, the interference cannot be avoided by changing the cutting angle of the cutter 40, otherwise the anti-rotation groove 40 can be influenced or even damaged.
Therefore, the application provides a manufacturing method of the positioning hole of the oil injector seat, the oil injector seat is punched by using an electrolytic machining process, the interference problem caused by machining can be avoided, and the positioning hole machining of the high-pressure fuel distribution pipe of the integrated structure is realized.
The following describes in more detail embodiments of the present invention with reference to the schematic drawings. Advantages and features of the present invention will become apparent from the following description and claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
As shown in fig. 2, and in conjunction with fig. 3-4, the present application provides a method of manufacturing an injector seat locating hole for forming a locating hole in an injector seat 100, comprising:
step S1: providing an electrolytic drill bit 200;
step S2: connecting the electrolytic drill 200 with a cathode, and connecting the injector seat 100 with an anode;
step S3: energizing said electrolytic drill bit 200 to maintain a set clearance between said electrolytic drill bit 200 and said working area 110 of said injector mount 100, and causing said electrolytic drill bit 200 to spray electrolyte toward said working area 110 to form at least one pair of locating holes in said working area 110, said pair of locating holes being used to suspend an injector 300.
Specifically, the manufacturing method of 300 positioning holes of the oil sprayer provided by the application can be suitable for punching of a traditional brazing type high-pressure fuel distribution pipe and can also be suitable for punching of an integrally formed high-pressure fuel distribution pipe.
In this embodiment, before step S1 is executed, the main body of the high-pressure fuel distribution pipe may be obtained by an integrally formed forging process. As shown in fig. 3, the main body includes a main oil pipe 400, an injector seat 100, and a fixed seat 500, and of course, other sub-parts such as an oil inlet pipe joint may be included, which is not limited in this application.
In this embodiment, the number of the injector seats 100 and the number of the fixing supports 500 are four, and the fixing supports 500 and the injector seats 100 are alternately arranged on the main oil pipe 400 along the axial direction of the main oil pipe 400, but the number and the arrangement of the fixing supports 500 and the injector seats 100 are not limited in this application.
In this embodiment, the step of obtaining the main body of the high-pressure fuel distribution pipe through the integral molding process specifically includes:
the method includes the steps of providing a bar, wherein the bar is a stainless steel round bar, and the material of the bar can be martensitic stainless steel or austenitic stainless steel, which is not limited by the application.
Heating the bar and performing hot die forging to obtain a forged blank. The hot die forging process has high production efficiency, low labor intensity, accurate size and small machining allowance, can forge forgings with complex shapes, and is relatively suitable for high-pressure fuel distribution pipes produced in batches.
And carrying out heat treatment and machining on the forged blank to obtain the main body of the high-pressure fuel distribution pipe. For example, a gun drill can be used for processing the inner cavity of the main oil pipe 400, a forming cutter is used for processing threads and holes at two ends of the main oil pipe 400, which are matched and sealed with plugs, a drilling and milling cutter is used for processing the inner cavity of the oil injector seat 100, and a common twist drill is used for processing a communication hole between the oil injector seat 100 and the main oil pipe 400.
The main body of the high-pressure fuel distribution pipe is manufactured by adopting an integral forming process, so that the problem of insufficient connection strength and rigidity of each part of the high-pressure fuel distribution pipe caused by a brazing connection process is solved, and the structural strength and the corrosion resistance of each part of the high-pressure fuel distribution pipe are kept consistent.
After the main body of the high-pressure fuel distribution pipe is obtained, the injector seat 100 is perforated. First, step S1 is executed to provide an electrolytic drill 200, and fix the main body on a fixture of the electrochemical machining apparatus.
Then, step S2 is executed to connect the electrolytic drill 200 to a cathode and the injector seat 100 to an anode.
Next, step S3 is performed to energize the electrolytic drill bit 200, maintain a set gap between the electrolytic drill bit 200 and the working area 110, and inject electrolyte to the working area 110 by the electrolytic drill bit 200 to form the pair of pilot holes in the working area 110. It should be understood that reference to the working area 110 in this application refers to the face of the pilot hole to be machined. In this embodiment, the set gap is between 0.1mm and 2mm to meet the machining regulation.
In this embodiment, referring to fig. 3 and 8, the outer contour of the injector seat 100 is circular arc, the injector seat 100 includes a first side wall and a second side wall opposite to each other, the positioning holes are arranged in pairs, each positioning hole pair includes two positioning holes respectively arranged on the first side wall and the second side wall, a suspension ring is arranged at the top of the injector 300, and the injector 300 is suspended by a fixing pin 600 sequentially penetrating through the positioning holes of the first side wall, the suspension ring and the positioning holes of the second side wall. The fixing pin penetrates through the suspension ring to suspend the injector 300, so that the connection mode of the injector 300 and the injector seat 100 is enriched.
In this embodiment, the positioning hole on the first side wall is a through hole, and the positioning hole on the second side wall may be a through hole or a blind hole, as long as the other end of the fixing pin 600 can be fixed. The application does not limit the number of the fixing pins 600, as long as the two ends of the fixing pins are respectively fixed on the positioning holes on the first side wall and the second side wall.
The central connecting line of the two positioning holes of each positioning hole pair can be parallel to the axial direction of the main oil pipe or not, and can be adjusted according to the arrangement requirement of the oil injector 300. In this embodiment, the central connecting line of the two positioning holes of each positioning hole pair does not intersect with the axis of the injector seat 100, so as to prevent the fixing pin 600 from penetrating through the oil pipe in the injector 300, which results in fuel leakage.
In this embodiment, an anti-rotation groove 700 is further disposed on the back surface of injector seat 100, and neither of the two positioning holes can interfere with anti-rotation groove 700, so as to avoid damaging anti-rotation groove 700.
Referring to fig. 4, the head of the electrolytic drill 200 is an inclined surface 210 to fit the circular arc-shaped working area 110 of the injector seat 100.
The step of energizing the electrolytic drill bit 200 to maintain a set gap between the electrolytic drill bit 200 and the working area 110, and spraying the electrolyte from the electrolytic drill bit 200 to the working area 110 to form at least one positioning hole pair in the working area 110 specifically includes:
step S31, adjusting the included angle between the inclined plane 210 of the electrolytic drill bit 200 and the normal line 120 of the working area 110 to make the gap between the head of the electrolytic drill bit 200 and the working area 110 uniform;
step S32, energizing the electrolytic drill 200 to feed the electrolytic drill 200 forward to the first side wall penetrating the injector seat 100 to form a positioning hole on the first side wall;
step S33, the electrolytic drill 200 is rotated 180 ° and the electrolytic drill 200 is advanced until the positioning hole on the second side wall is formed.
After the step S2 is performed, step S31 is performed to adjust the electrolytic drill bit 200 such that the inclined surface 210 is perpendicular to the normal 120 of the working area 110 to make the gap between the head of the electrolytic drill bit 200 and the working area 110 uniform, thereby making the electric field distribution uniform and the electrolyte injection uniform, and improving the machining efficiency. Specifically, in the present embodiment, the working area 110 is a circular arc surface, so the normal 120 in this embodiment is the normal 120 of the circular arc surface, and the normal 120 passes through the intersection point of the axis of the electrolytic drill 200 and the circular arc surface of the injector seat 100;
further, the difference between the maximum value and the minimum value of the gap between the head of the electrolytic drill bit 200 and the working area 110 is not more than 1.5mm, so as to ensure that the distance between the electrolytic drill bit 200 and the working area 110 is uniform, and improve the processing efficiency.
When the electrolytic drill 200 and the working area 110 reach the set clearance, step S32 is executed, referring to fig. 5, the power supply is turned on to energize and drive the electrolytic drill 200 to feed forward to the first side wall penetrating the injector seat 100, and at the same time, the electrolytic drill 200 is made to spray the electrolyte to the working area 110. Under the action of the electrolyte, the metal particles on the first side wall of the anode are electrolyzed and dissolved in the electrolyte to form the positioning holes on the first side wall.
Then, step S33 is executed, referring to fig. 6, the electrolytic drill 200 is rotated 180 ° to adapt to the contour shape of the second sidewall, and then the electrolytic drill 200 is fed forward to the second sidewall to form the positioning hole on the second sidewall.
It should be understood that, in the electrolytic machining, the central connecting line of the two positioning holes of each positioning hole pair does not intersect with the axis of the injector seat 100, so as to avoid the fixing pin 600 penetrating through the oil pipe in the injector 300, and therefore, the positioning holes on the first side wall and the second side wall of the injector seat 100 are asymmetric surfaces, so that the electrolytic drill 200 and the first side wall and the second side wall of the injector seat 100 are necessarily included at an angle different from 90 °. Therefore, with reference to fig. 4, in addition to the inclined surface 210 disposed on the electrolytic drill 200, an inclined opening 220 may be disposed on the electrolytic drill 200, and an included angle β between the inclined opening 220 and an axis of the electrolytic drill is smaller than 90 °, so that the electrolyte can be uniformly sprayed on the working area 110, and the processing efficiency is improved.
In this embodiment, the angle a between the oblique opening 220 and the normal 120 of the working area 110 is not greater than 45 °.
After the drilling is finished, the power supply and the electrolyte are turned off, the electrolytic drill bit 200 is driven reversely to move in the reverse direction along the axial direction and is withdrawn from the main body, and then the driving is stopped.
This application adopts electrolytic machining's mode to punch, and the cutter is blockked by fixing support 500 and the problem that can not feed when having avoided the machining drilling to punch and this two-step manufacturing procedure of chamfer burring merges into this one step of process of electrolytic machining with the machining, has reduced manufacturing procedure, has improved production efficiency.
Based on this, this application still provides a high-pressure fuel distributing pipe, high-pressure fuel distributing pipe is the integrated into one piece structure, just high-pressure fuel distributing pipe includes a plurality of adoption the injector seat of manufacturing approach preparation of injector seat locating hole. The high-pressure fuel distributing pipe is manufactured by adopting an integral forming process, so that the problem that the brazing structural strength between the oil through sub part and the main oil pipe of the existing high-pressure fuel distributing pipe cannot meet higher oil supply pressure and further cracks and oil leaks is solved, the structural strength of the high-pressure fuel distributing pipe is improved, and the high-pressure fuel distributing pipe is stronger in corrosion resistance. In addition, the outer contour of the high-pressure fuel distributing pipe can flexibly change the shape according to the arrangement space of the engine, so that the problem that the existing high-pressure fuel distributing pipe cannot be assembled due to the interference with the boundary of the engine is solved.
Alternatively, the positioning holes on a plurality of injector seats can be machined simultaneously. It should be understood that the number of the electrolytic drill bits is variable, for example, a linkage mechanism is designed, and a plurality of drill bits are installed at the same time, so that a plurality of injector seats of the high-pressure fuel distribution pipe can be simultaneously perforated, and the production efficiency is improved. It is understood that the present embodiment is not limited to punching round holes, and holes with other shapes, such as square, can be punched by designing different electrolytic drill bits, and the present application is not limited thereto.
In summary, the present invention provides a method for manufacturing a positioning hole of an injector seat, which is used for forming a positioning hole on an injector seat, and includes: providing an electrolytic drill bit; connecting the electrolytic drill bit with a cathode, and connecting the oil sprayer seat with an anode; and electrifying the electrolytic drill bit, keeping a set gap between the electrolytic drill bit and the working area of the injector seat, and spraying electrolyte to the working area of the injector seat by the electrolytic drill bit to form at least one positioning hole pair in the working area, wherein the positioning hole pair is used for suspending an oil injector. The positioning hole pair for suspending the oil injector is formed on the oil injector seat through an electrolytic machining process, so that the problem of interference caused by punching in the traditional machining process is solved. Based on this, the application still provides a high-pressure fuel distributing pipe, high-pressure fuel distributing pipe is the integrated into one piece structure, including a plurality of adoption the injector seat of manufacturing approach preparation of injector seat locating hole, have that structural strength is big, corrosion resistance is strong and shape advantage such as changeable.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A method of forming a locating hole in an injector seat, comprising:
providing an electrolytic drill bit;
connecting the electrolytic drill bit with a cathode, and connecting the oil sprayer seat with an anode;
and electrifying the electrolytic drill bit, keeping a set gap between the electrolytic drill bit and the working area of the oil sprayer seat, and spraying electrolyte to the working area by the electrolytic drill bit to form at least one positioning hole pair in the working area, wherein the positioning hole pair is used for suspending an oil sprayer.
2. The method of manufacturing a locating hole in an injector mount of claim 1, wherein said injector mount comprises a first side wall and a second side wall opposite to each other, each of said pair of locating holes comprises two locating holes respectively formed in said first side wall and said second side wall, a suspension ring is formed on a top portion of said injector, and a locating pin is sequentially inserted through said locating hole in said first side wall, said suspension ring and said locating hole in said second side wall to suspend said injector.
3. The method of claim 2, wherein the step of providing the electrolytic drill bit with an inclined head portion to provide electrical power to the electrolytic drill bit to maintain a predetermined gap between the electrolytic drill bit and the working area of the injector seat and to spray the electrolytic drill bit toward the working area to form at least one pair of alignment holes in the working area comprises:
adjusting an included angle between the inclined surface of the electrolytic drill bit and the normal of the working area to enable a gap between the head of the electrolytic drill bit and the working area to be uniform;
energizing the electrolytic drill bit to advance the electrolytic drill bit forward to a first sidewall through the injector seat to form a locating hole in the first sidewall;
and rotating the electrolytic drill bit by 180 degrees, and feeding the electrolytic drill bit forwards until a positioning hole on the second side wall is formed.
4. The method of manufacturing an injector seat locating hole as claimed in claim 3, wherein said inclined surface is at an angle of 90 ° to the normal to said working area.
5. The method of manufacturing an injector seat locating hole as defined in claim 4, wherein the difference between the maximum value and the minimum value of the clearance between the head of said electrolytic drill bit and said working area is not more than 1.5 mm.
6. The method for manufacturing the positioning hole of the oil sprayer seat as claimed in claim 1, wherein an inclined opening is arranged at the end part of the electrolysis drill bit, the included angle between the inclined opening and the axis of the electrolysis drill bit is less than 90 degrees, and the electrolyte is sprayed out from the inclined opening.
7. The method of manufacturing an injector seat locating hole as defined in claim 6, wherein an angle between said oblique opening and a normal direction of said working area is not greater than 45 °.
8. The method of manufacturing an injector seat locating hole as defined in claim 1, wherein said set clearance is between 0.1mm and 2 mm.
9. A high pressure fuel distribution pipe characterized by being of an integrally formed structure and comprising a plurality of injector seats made by the method of making injector seat locating holes as claimed in claims 1-8.
10. The high pressure fuel distribution rail of claim 9, wherein a plurality of alignment holes in said injector seat are machined simultaneously.
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| CN202011052630.5A CN112207378B (en) | 2020-09-29 | 2020-09-29 | Manufacturing method of oil injector seat positioning hole and high-pressure fuel oil distribution pipe |
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| CN202011052630.5A CN112207378B (en) | 2020-09-29 | 2020-09-29 | Manufacturing method of oil injector seat positioning hole and high-pressure fuel oil distribution pipe |
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| CN112207378B CN112207378B (en) | 2022-11-29 |
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| CN106312458A (en) * | 2016-09-21 | 2017-01-11 | 吉林博仁科技股份有限公司 | Machining method for oil sprayer seat |
| CN109139318A (en) * | 2018-08-09 | 2019-01-04 | 联合汽车电子有限公司 | Fuel dispensing tube and its manufacturing method |
| CN110948068A (en) * | 2018-09-27 | 2020-04-03 | 联合汽车电子有限公司 | Fuel distributing pipe and processing method of connecting hole thereof |
| CN210188753U (en) * | 2019-06-06 | 2020-03-27 | 上海众源燃油分配器制造有限公司 | Processing device for high-pressure oil rail perforation |
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