CN104551585A - Machining technique of hole of fuel injector - Google Patents
Machining technique of hole of fuel injector Download PDFInfo
- Publication number
- CN104551585A CN104551585A CN201310499504.8A CN201310499504A CN104551585A CN 104551585 A CN104551585 A CN 104551585A CN 201310499504 A CN201310499504 A CN 201310499504A CN 104551585 A CN104551585 A CN 104551585A
- Authority
- CN
- China
- Prior art keywords
- spray orifice
- hole
- atomizer
- wire electrode
- injection nozzle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
Abstract
The invention discloses a machining technique of a hole of a fuel injector and relates to the field of automobile engine parts. The machining technique includes electrical discharge machining of the hole and extrude-grinding and includes the steps of positioning and clamping, electrical discharge machining of the hole, trimming of the hole, shifting and clamping, extrude-grinding, checking, and screening. The machining technique has the advantages that electrical discharge machining is suitable for machining of the hole with micro diameter, an electrode wire machined by electrical discharge machining has small vibration amplitude, machining precision and stability is high, extrude-grinding allows coarseness of the inner wall of the hole to be improved, fuel for injecting is better atomized, the industrial requirements are met, the machining technique is simple, and the use of the machining technique to line production leads to higher automation level.
Description
Technical field
The present invention relates to automobile engine accessory field, be specifically related to a kind of injection hole on injection nozzle processing technology.
Background technology
Atomizer is as one of the critical component of engine, its work quality is by the serious performance affecting engine, along with the increasingly stringent of Abgasgesetz, in fuel system, the processing request of injection hole on injection nozzle is also more and more higher, traditional injection hole on injection nozzle process technology cannot meet the instructions for use of Euro III Emission Regulation, if application number is 89109290.0 disclose a kind of injection hole on injection nozzle processing technology, vibration drilling and mixed flow is adopted to spray processing technology, the main shaft of vibration drill does axial low-frequency vibration and feed motion high speed is pivotal simultaneously, drilling is carried out to injection hole on injection nozzle, afterwards atomizer workpiece being placed in mixed flow sprays on the workbench of process equipment, the mill liquid sprayed by spray gun is processed injection hole on injection nozzle, the vibration drilling that this invention adopts can reduce injection hole surface roughness and aperture burr, processed can be reduced injection hole surface roughness further by mixed flow, nozzle pressure room end burr is eliminated, and by its sharp bead chamfering, but this invention is suitable for processing the larger spray orifice in aperture, the spray orifice more and more less for aperture then cannot be processed, and the drill bit precision of drilling is low, the symmetry of left and right two-edged is unstable, the spray orifice roughness of processing is larger, chip removal does not freely easily squeeze off drill bit, the drill bit poor rigidity life-span is short, production cost is large.
Summary of the invention
It is less that problem to be solved by this invention is to provide a kind of spray orifice aperture, and technical process is simple, and machining accuracy is high, a kind of injection hole on injection nozzle processing technology that technology stability is high.
To achieve these goals, the technical scheme that the present invention takes for: a kind of injection hole on injection nozzle processing technology provided, comprises following processing step:
(1) location clamping: be put in by the atomizer that mesopore and entrance circular angle process on numerical control electric spark processing spray orifice lathe, adopt the spatial axes of alignment pin to locate mode and special claw type gear grips, described claw type institution staff scope is 0 ~ 105o;
(2) spray orifice spark machined: first adjust the whole pulse frequency of wire electrode to be 150kHz, pulse width is 4 μ s, discharging gap is 62 ~ 70% voltages, carry out wire electrode correction again, correction length is 0.3mm, and the amount of feeding in electrical spark working man-hour will be determined according to injection hole on injection nozzle actual grade, wire electrode adopts auto-feed, auto-compensation mode, the injection diameter range of work is 0.14 ~ 0.17mm, and spray orifice k-factor is 1.5 ~ 2.5, and the process time in each hole is 36 ~ 42s;
(3) spray orifice finishing: back taper finishing is removed in the wire electrode feeding of step (2) being processed, during spray orifice finishing, the amount of feeding of wire electrode is 0.3 ~ 0.5mm, and discharging gap is 68% voltage;
(4) be shifted clamping: be put into by the atomizer that step (3) processes on the dedicated extruded milling apparatus of injection hole on injection nozzle, adopts workseat to locate with the sphere self-localization method that coordinates between base, pressure head and hydraulic cylinder clamping atomizer mode clamping;
(5) crush and grind processing: the atomizer clamping to step (4) sprays abrasive Flow, abrasive Flow enters atomizer mesopore from pressure head, through atomizer balancing gate pit, passes through spray orifice at a high speed, the operating pressure of abrasive Flow is 3.6 ~ 4.2MPa, and process time is 8 ~ 12s;
(6) check: the roughness checking the injection hole on injection nozzle that step (5) is obtained, whether circularity is consistent with designing requirement with flow value;
(7) screen: by the inspection operation of step (6), choose roughness, the circularity atomizer consistent with designing requirement with flow value is as final products.
Preferably, in described step (2), wire electrode rotating speed controls at 950 ~ 1200r/mim.
Preferably, abrasive Flow is made up of abrasive material and grinding agent in described step (5), and abrasive material is hardening oxidation silicon grain, and grinding agent is 100 ~ 112mm by a kind of viscosity
2the fluid of the naphthenic mineral oil of/s and stearic acid composition.
Preferably, in described step (5), the flow detection device of abrasive Flow is ultrasonic liquid flow detector, spray orifice grinding can be processed by grinding-detection-grinding-detection method of successive approximation, and be less than till 0.7 μm until spray orifice inner wall coarse angle value, each milling time is 8 ~ 12s.
Adopt technical scheme of the present invention, described spray orifice spark machined can meet the small requirement in spray orifice aperture, and the wire electrode wire electrode vibration amplitude of spark machined is little, machining accuracy and stability high, described crush and grind processing can enter to improve spray orifice inner wall roughness, fuel-injected atomizing effect is improved, and technique is simple, and applying to production line balance, can to realize automaticity high.
Detailed description of the invention
embodiment 1:
1, location clamping: the atomizer that mesopore and entrance circular angle process is put on numerical control electric spark processing spray orifice lathe, adopts the spatial axes of alignment pin to locate mode and special claw type gear grips;
2, spray orifice spark machined: first adjust the whole pulse frequency of wire electrode to be 150kHz, pulse width is 4 μ s, carry out wire electrode correction again, the discharging gap of correction is 70% voltage, and correction length is 0.3mm, the amount of feeding in electrical spark working man-hour will be determined according to injection hole on injection nozzle actual grade, wire electrode adopts auto-feed, auto-compensation mode, and wire electrode rotating speed controls at 950r/min, and injection diameter is processed as 0.15mm, spray orifice k-factor is 1.8, and the process time in each hole is 36s;
3, spray orifice finishing: back taper finishing is removed in the wire electrode feeding of step (2) being processed, during spray orifice finishing, the amount of feeding of wire electrode is 0.3mm, and discharging gap is 68% voltage;
4, be shifted clamping: be put into by the atomizer that step (3) processes on the dedicated extruded milling apparatus of injection hole on injection nozzle, adopts workseat to locate with the sphere self-localization method that coordinates between base, pressure head and hydraulic cylinder clamping atomizer mode clamping;
5, crush and grind processing: the atomizer clamping to step (4) sprays abrasive Flow, abrasive Flow enters atomizer mesopore from pressure head, through atomizer balancing gate pit, passes through spray orifice at a high speed, the operating pressure of abrasive Flow is 3.6MPa, and selected grinding agent is 100mm by a kind of viscosity
2the fluid of the naphthenic mineral oil of/s and stearic acid composition, process time is 8s, the flow detection device of abrasive Flow is ultrasonic liquid flow detector, spray orifice grinding can be processed by grinding-detection-grinding-detection method of successive approximation, is less than till 0.7 μm until spray orifice inner wall coarse angle value;
6, check: the roughness checking the injection hole on injection nozzle that step (5) is obtained, whether circularity is consistent with designing requirement with flow value;
7, screen: by the inspection operation of step (6), choose roughness, the circularity atomizer consistent with designing requirement with flow value is as final products.
embodiment 2:all the other are identical with embodiment 1, difference is that in described step (2), injection diameter is processed as 0.16mm, and wire electrode rotating speed controls at 1000r/min, spray orifice k-factor is 2.1, the process time in each hole is 38s, and in described step (3), during spray orifice finishing, the amount of feeding of wire electrode is 0.4mm, discharging gap is 68% voltage, in described step (5), the operating pressure of abrasive Flow is 3.8MPa, and process time is 10s.
embodiment 3:all the other are identical with embodiment 1, and difference is, in described step (2), injection diameter is processed as 0.17mm, wire electrode rotating speed controls at 1200r/min, and spray orifice k-factor is 2.5, and the process time in each hole is 42s, in described step (3), during spray orifice finishing, the amount of feeding of wire electrode is 0.5mm, and discharging gap is 68% voltage, in described step (5), the operating pressure of abrasive Flow is 4.2MPa, and process time is 12s.
After above processing step, take out atomizer sample, to be measured:
From above data, the aperture of gained injection hole on injection nozzle is less, spray orifice k-factor is in 1.5 ~ 2.5 scopes, spray orifice inner wall roughness is less than 0.8 μm, spray orifice circularity is less than 3 μm, meet engine request, the wire electrode vibration amplitude of spark machined is little, machining accuracy and stability high, crush and grind processing can further improve spray orifice inner wall roughness, fuel flow value is increased, improve fuel-injected atomizing effect, ensure that burning more fully and reduce the generation of carbon distribution, technique is simple, and applying to production line balance, can to realize automaticity high.
Obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.
Claims (4)
1. an injection hole on injection nozzle processing technology, is characterized in that, comprise spray orifice spark machined and crush and grind processing technology, processing technology step is as described below:
(1) location clamping: be put in by the atomizer that mesopore and entrance circular angle process on numerical control electric spark processing spray orifice lathe, adopt the spatial axes of alignment pin to locate mode and special claw type gear grips, described claw type institution staff scope is 0 ~ 105o;
(2) spray orifice spark machined: first adjust the whole pulse frequency of wire electrode to be 150kHz, pulse width is 4 μ s, discharging gap is 62 ~ 70% voltages, carry out wire electrode correction again, correction length is 0.3mm, and the amount of feeding in electrical spark working man-hour will be determined according to injection hole on injection nozzle actual grade, wire electrode adopts auto-feed, auto-compensation mode, the injection diameter range of work is 0.14 ~ 0.17mm, and spray orifice k-factor is 1.5 ~ 2.5, and the process time in each hole is 36 ~ 42s;
(3) spray orifice finishing: back taper finishing is removed in the wire electrode feeding of step (2) being processed, during spray orifice finishing, the amount of feeding of wire electrode is 0.3 ~ 0.5mm, and discharging gap is 68% voltage;
(4) be shifted clamping: be put into by the atomizer that step (3) processes on the dedicated extruded milling apparatus of injection hole on injection nozzle, adopts workseat to locate with the sphere self-localization method that coordinates between base, pressure head and hydraulic cylinder clamping atomizer mode clamping;
(5) crush and grind processing: the atomizer clamping to step (4) sprays abrasive Flow, abrasive Flow enters atomizer mesopore from pressure head, through atomizer balancing gate pit, passes through spray orifice at a high speed, the operating pressure of abrasive Flow is 3.6 ~ 4.2MPa, and process time is 8 ~ 12s;
(6) check: the roughness checking the injection hole on injection nozzle that step (5) is obtained, whether circularity is consistent with designing requirement with flow value;
(7) screen: by the inspection operation of step (6), choose roughness, the circularity atomizer consistent with designing requirement with flow value is as final products.
2. a kind of injection hole on injection nozzle processing technology according to claim 1, is characterized in that: in described step (2), wire electrode rotating speed controls at 950 ~ 1200r/min.
3. a kind of injection hole on injection nozzle processing technology according to claim 1, is characterized in that: abrasive Flow is made up of abrasive material and grinding agent in described step (5), and abrasive material is hardening oxidation silicon grain, and grinding agent is 100 ~ 112mm by a kind of viscosity
2the fluid of the naphthenic mineral oil of/s and stearic acid composition.
4. a kind of injection hole on injection nozzle processing technology according to claim 1, it is characterized in that: in described step (5), the flow detection device of abrasive Flow is ultrasonic liquid flow detector, spray orifice grinding can be processed by grinding-detection-grinding-detection method of successive approximation, be less than till 0.7 μm until spray orifice inner wall coarse angle value, each milling time is 8 ~ 12s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310499504.8A CN104551585A (en) | 2013-10-23 | 2013-10-23 | Machining technique of hole of fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310499504.8A CN104551585A (en) | 2013-10-23 | 2013-10-23 | Machining technique of hole of fuel injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104551585A true CN104551585A (en) | 2015-04-29 |
Family
ID=53069218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310499504.8A Pending CN104551585A (en) | 2013-10-23 | 2013-10-23 | Machining technique of hole of fuel injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104551585A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833387A (en) * | 2015-05-07 | 2015-08-12 | 长春理工大学 | Oil nozzle abrasive flow machining single factor test analysis method |
| CN106078116A (en) * | 2016-07-28 | 2016-11-09 | 北海明杰科技有限公司 | A kind of injection hole on injection nozzle temper technique |
| CN106078117A (en) * | 2016-07-28 | 2016-11-09 | 北海明杰科技有限公司 | A kind of automatization fuel injection equipment atomizer processing technique |
| CN106181245A (en) * | 2016-07-28 | 2016-12-07 | 北海明杰科技有限公司 | A kind of fuel injection equipment atomizer processing technique |
| CN106216785A (en) * | 2016-07-28 | 2016-12-14 | 北海明杰科技有限公司 | A kind of fuel injection equipment injection hole on injection nozzle processing technique |
| CN106216783A (en) * | 2016-07-28 | 2016-12-14 | 北海明杰科技有限公司 | A kind of injection hole on injection nozzle quenching processing technique |
| CN110253347A (en) * | 2019-06-05 | 2019-09-20 | 太原理工大学 | A kind of ultrasonic vibration auxiliary abrasive stream injection hole on injection nozzle back taper molding equipment and method |
| CN112662376A (en) * | 2020-12-30 | 2021-04-16 | 山东鑫亚工业股份有限公司 | Formula and application of grinding agent for fuel injection pump product |
| CN113059331A (en) * | 2021-04-02 | 2021-07-02 | 中国航发南方工业有限公司 | Method for machining tiny special-shaped inner hole of oil nozzle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0299143A1 (en) * | 1987-06-12 | 1989-01-18 | Raycon Textron Inc. | Laser/EDM drilling manufacturing cell |
| CN1052533A (en) * | 1989-12-12 | 1991-06-26 | 吉林工业大学 | Injection hole on injection nozzle processing technology and equipment |
| CN102240835A (en) * | 2011-05-31 | 2011-11-16 | 清华大学 | Electrochemical machining method and device for oil nozzle spray orifice of diesel motor |
| CN102500850A (en) * | 2011-10-09 | 2012-06-20 | 清华大学 | Needle valve and precise tiny electric spark processing method for conical surfaces of needle valve body |
| CN102990506A (en) * | 2012-12-04 | 2013-03-27 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Extruding and grinding device for spray orifice of oil spray nozzle and extruding and grinding method for spray orifice of oil spray nozzle |
-
2013
- 2013-10-23 CN CN201310499504.8A patent/CN104551585A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0299143A1 (en) * | 1987-06-12 | 1989-01-18 | Raycon Textron Inc. | Laser/EDM drilling manufacturing cell |
| CN1052533A (en) * | 1989-12-12 | 1991-06-26 | 吉林工业大学 | Injection hole on injection nozzle processing technology and equipment |
| CN102240835A (en) * | 2011-05-31 | 2011-11-16 | 清华大学 | Electrochemical machining method and device for oil nozzle spray orifice of diesel motor |
| CN102500850A (en) * | 2011-10-09 | 2012-06-20 | 清华大学 | Needle valve and precise tiny electric spark processing method for conical surfaces of needle valve body |
| CN102990506A (en) * | 2012-12-04 | 2013-03-27 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Extruding and grinding device for spray orifice of oil spray nozzle and extruding and grinding method for spray orifice of oil spray nozzle |
Non-Patent Citations (1)
| Title |
|---|
| 周毅: "满足欧Ⅲ以上排放喷油嘴的喷孔加工技术研究", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833387A (en) * | 2015-05-07 | 2015-08-12 | 长春理工大学 | Oil nozzle abrasive flow machining single factor test analysis method |
| CN106078116A (en) * | 2016-07-28 | 2016-11-09 | 北海明杰科技有限公司 | A kind of injection hole on injection nozzle temper technique |
| CN106078117A (en) * | 2016-07-28 | 2016-11-09 | 北海明杰科技有限公司 | A kind of automatization fuel injection equipment atomizer processing technique |
| CN106181245A (en) * | 2016-07-28 | 2016-12-07 | 北海明杰科技有限公司 | A kind of fuel injection equipment atomizer processing technique |
| CN106216785A (en) * | 2016-07-28 | 2016-12-14 | 北海明杰科技有限公司 | A kind of fuel injection equipment injection hole on injection nozzle processing technique |
| CN106216783A (en) * | 2016-07-28 | 2016-12-14 | 北海明杰科技有限公司 | A kind of injection hole on injection nozzle quenching processing technique |
| CN110253347A (en) * | 2019-06-05 | 2019-09-20 | 太原理工大学 | A kind of ultrasonic vibration auxiliary abrasive stream injection hole on injection nozzle back taper molding equipment and method |
| CN112662376A (en) * | 2020-12-30 | 2021-04-16 | 山东鑫亚工业股份有限公司 | Formula and application of grinding agent for fuel injection pump product |
| CN113059331A (en) * | 2021-04-02 | 2021-07-02 | 中国航发南方工业有限公司 | Method for machining tiny special-shaped inner hole of oil nozzle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104551585A (en) | Machining technique of hole of fuel injector | |
| CN104289880A (en) | Oil nozzle spraying hole machining technology | |
| CN101405108B (en) | Device and method for ELID honing | |
| Boubekri et al. | A technology enabler for green machining: minimum quantity lubrication (MQL) | |
| CN104588962B (en) | A kind of engine hole type nozzle single hole crush and grind device and application method | |
| CN104874876A (en) | Tool electrode machining technology and method for machining micro hole through tool electrode | |
| CN103561895B (en) | The method of electrochemical machining of workpiece and device | |
| CN102059417A (en) | Electrode and machine tool dedicated for combined machining of electric spark shaping of inner round bore and elastic honing | |
| CN104175144A (en) | Shaft gear fixture and shaft gear machining tool | |
| CN105710606A (en) | Machining method of gas generator nozzle head | |
| CN105033868B (en) | A kind of precise polished processing unit (plant) of high-pressure injection abrasive Flow | |
| CN105479176A (en) | Robot drilling and milling device and method utilizing minimum quantity lubrication system | |
| CN105728772A (en) | Method for machining high-position-precision deep hole in connection rod of diesel engine | |
| CN102407423B (en) | Method for machining valve seat of respiratory flow and rhythm control air valve | |
| US4703142A (en) | Method of combining grinding and EDM operation for finishing fuel injector nozzle bodies | |
| CN105195966A (en) | Floating type outer cylindrical surface rolling device and rolling process | |
| CN204913191U (en) | Floating outer face of cylinder rolling press device | |
| CN102031543B (en) | Processing method for repairing chromium coating of undercarriage piston rod with unqualified air tightness | |
| CN103737257A (en) | Method for machining textile roller shaft heads | |
| CN105522346A (en) | Super-finishing machining method for inner holes of outer cylinder work-pieces | |
| CN214771382U (en) | Tool setting device for abrasive water jet equipment and water jet cutting machine tool | |
| CN204975573U (en) | Process units of turning external screw thread | |
| CN107671640A (en) | A kind of aero-engine fuel nozzle precision part grinding quick change frock and application method | |
| CN108098474A (en) | A kind of processing method of fixture and eccentric drill bushing for eccentric drill bushing processing | |
| CN201283507Y (en) | Positioning apparatus for chamfering drill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |