CN107999704A - A kind of high-pressure oil pump delivery valve holder processing technology - Google Patents
A kind of high-pressure oil pump delivery valve holder processing technology Download PDFInfo
- Publication number
- CN107999704A CN107999704A CN201711162372.4A CN201711162372A CN107999704A CN 107999704 A CN107999704 A CN 107999704A CN 201711162372 A CN201711162372 A CN 201711162372A CN 107999704 A CN107999704 A CN 107999704A
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- Prior art keywords
- inner cylinder
- delivery valve
- valve holder
- pedestal
- outer barrel
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
- C23C8/22—Carburising of ferrous surfaces
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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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
- F02M59/462—Delivery valves
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses a kind of processing technology of the delivery valve holder on high-pressure oil pump, this kind of delivery valve holder passes through the formation of crack region decision to delivery valve holder fatigue fracture, existing delivery valve holder is improved, the form that crackle source region is threadedly coupled to external member by inner cylinder with outer barrel is strengthened, avoid because fracture occurs in fatigue crack so that the rupture of whole delivery valve holder, it is convenient at the same time that care and maintenance is carried out to delivery valve holder, while substantially prolongs the service life of existing delivery valve holder.The processing technology of this kind of delivery valve holder is for delivery valve holder design feature in the present invention, internal workpiece for barrel carries out case-carbonizing processing, so that inner cylinder is also easy to produce crackle source region and has obtained local strengthening processing, cast raw material using waste and old valve body material as pedestal front end, pedestal rear end and outer barrel at the same time, improves the service life of this kind of product on the premise of reducing cost.
Description
Technical field
The present invention relates to a kind of high-pressure oil pump annex manufacturing technology field, more particularly to it is fuel-displaced on a kind of high-pressure oil pump
The tight seat of valve and its processing technology.
Background technology
Delivery-valve carrier on conventional diesel engine high-pressure oil pump, has pedestal, and the both ends of pedestal are equipped with screw thread pair, seat
Delivery valve installation cavity is provided with vivo, one end of delivery valve installation cavity, which is located in pedestal, is also provided with oil outlet.The delivery valve of diesel engine
Fracture accident phenomenon during tightly seat is on active service now repeatly, for this phenomenon, it has been investigated that fracture is generally present in pedestal
Middle part, analyze fracture existing for tear trace find, formation of crack is generally present at installation cavity inner circle port, due to depositing herein
In significantly machining trace, it is easy to germinate fatigue crack, so as to cause delivery valve holder fatigue fracture, reduces making for product
Use the service life.Therefore, it is extremely to have to design a kind of delivery-valve carrier that can be solved the above problems well and its processing technology
It is necessary.
The content of the invention
It is an object of the invention to provide the delivery valve holder processing technology on a kind of high-pressure oil pump, this kind of delivery valve holder
By the formation of crack region decision to delivery valve holder fatigue fracture, existing delivery valve holder is improved, by formation of crack
The form that region is threadedly coupled external member by inner cylinder with outer barrel is strengthened, and avoids because fatigue crack fracture occurs so that entirely going out
The tight seat rupture of fuel tap, while care and maintenance conveniently is carried out to delivery valve holder, while it is tight to substantially prolongs existing delivery valve
The service life of seat.The processing technology of this kind of delivery valve holder is for delivery valve holder design feature in the present invention, to inner cylinder
Workpiece carries out case-carbonizing processing so that and inner cylinder is also easy to produce crackle source region and has obtained local strengthening processing, while with waste and old
Cast raw material of the valve body material as pedestal front end, pedestal rear end and outer barrel, improves this kind production on the premise of reducing cost
The service life of product.
For achieving the above object, the present invention adopts the following technical scheme that：
The present invention provides a kind of high-pressure oil pump delivery valve holder processing technology, the delivery valve holder has pedestal, seat
Delivery valve installation cavity is provided with vivo, one end of delivery valve installation cavity, which is located in pedestal, is also provided with oil outlet, and the pedestal includes seat
Body front end, pedestal rear end and middle part reducer, the middle part reducer are matched somebody with somebody by screw thread respectively with pedestal front end, pedestal rear end
Connection is closed, the middle part reducer includes outer barrel and inner cylinder, and the inner cylinder has " convex " shape contour structure, and described interior
Cylinder is threadedly coupled with outer barrel, and the inner cylinder takes chamber and top jet hole in including inside, and the top jet hole connects
Pass-out oilhole, it is rounded corner structure that the inside, which takes cavity edge in, and the inner cylinder is with being equipped with first at outer barrel thread contact
Seal washer, and the seal washer side is provided through the first oil return duct of outer barrel.
A kind of high-pressure oil pump delivery valve holder processing technology provided by the present invention, its processing technology specifically include following step
Suddenly：
(1) casting mold is made according to the shape of outer barrel, pedestal front end and pedestal rear end respectively, and is opened up respectively on casting mold
Cast gate, is heated to 105-115 DEG C after casting mold then is coated coating, keeps the temperature 30-40min, then proceed to be heated to 205-215
DEG C, keep the temperature 50-60min；The mold material is resin sand core；
(2) smelted to obtain cast raw material liquation using waste and old valve body material as cast raw material, added into casting liquation
Enter nodulizer spheroidising and carry out spheroidising 6-8min, then after perlite slag making is dispensed on cast raw material liquation to purify
Cast raw material liquation is simultaneously skimmed at once；
(3) the cast raw material liquation for obtaining step (2) stands 18-23min, is then poured in the casting mold into step (1)
The blank of outer barrel, pedestal front end and pedestal rear end is formed, pouring temperature control adds in 1350-1380 DEG C, casting process
Alterant；
(4) it will pour after the blank that outpours is cooled to room temperature, remove flash removed；
(5) inner cylinder raw material are chosen, it is cylindrical using centerless grinder mill inner cylinder, inner cylinder is ground using mesoporous seat surface grinding machine
Internal portion takes chamber in, is drilled using drilling machine to inner cylinder, gets top jet hole；
(6) obtained outer barrel, pedestal front end and pedestal rear end are subjected to normative heat treatment technique, table is carried out to inner cylinder
Face carburizing and quenching technique, concretely comprises the following steps：
Inner cylinder is placed in heating furnace, heating furnace rises to 870-890 DEG C with carburizing, carburizing time 2h from room temperature；Will
Inner cylinder is accelerated to be cooled to room temperature by the inner cylinder after carburizing using air-cooled；Inner cylinder workpiece is again placed in heating furnace, is heated
Stove rises to 870-890 DEG C with carburizing, carburizing time 3h from room temperature；By the inner cylinder work after secondary carburizing by the way of water quenching
Part is cooled to room temperature；After inner cylinder workpiece quenching, it is cooled to room temperature and is cleaned, finally carries out temper.
As the present invention to the preferred of such scheme, the inner cylinder raw material are 45 steel.
As the present invention to the preferred of such scheme, quenching and preserving heat temperature is 670-680 DEG C in the step (6), insulation
Time is 1-2h, and quenching mode is oil quenching.
As the present invention to the preferred of such scheme, the middle tempering holding temperature of the step (6) is 650-700 DEG C, insulation
Time is 1-1.5h, is air-cooled to room temperature.
Beneficial effects of the present invention are as follows：
Compared with the prior art, sent out for delivery valve holder fracture is more due to stress concentration phenomenon in middle part reducing tube body
Phenomenon, the present invention delivery valve holder is divided into pedestal front end, pedestal rear end and middle part reducer threadably, and
The middle part reducer is made of outer barrel and inner cylinder, wherein, for delivery valve holder in the prior art because of internal cavity
Machining trace is more easy to the problem of fatigue crack source occur, and present invention inside in inner cylinder takes cavity edge in and is equipped with rounded corner knot
Structure, so that the present invention is not easy to crack source because inside cavity pressure is big in use, improves making for product
Use the service life.The present invention carries out classification processing in processing technology to pedestal front end, pedestal rear end and middle part reducer at the same time, right
The middle part reducer of stress concentration carries out local strengthening processing during use, to uniform forces such as pedestal front end, pedestal rear ends
Region as casting raw material, reduces the material cost of Product processing using waste and old valve body material, while after reinforcing
Inner cylinder workpiece has higher case hardness, intensity and toughness, substantially increases the service life of inner cylinder workpiece, in addition,
The design of inner cylinder workpiece is more convenient to be replaced and is safeguarded, avoids delivery valve holder and is integrally integrally reported because of localized cracks source
It is useless.In addition, processing technology step of the present invention is simple, processing cost is relatively low, has wide applicability.
Brief description of the drawings
Fig. 1 is the assembling structure schematic diagram of the delivery valve holder on a kind of high-pressure oil pump of the present invention.
Fig. 2 is the structural decomposition diagram of the delivery valve holder on a kind of high-pressure oil pump of the present invention.
Wherein, 1- oil outlets, 2-pedestal front end, 3-pedestal rear end, 4-middle part reducer, 5-outer barrel, 6-inner cylinder
Body, 7-inside take chamber, 8-top jet hole, 9-rounded corner structure, the 10-the first seal washer, the 11-the first oil return hole in
Road, the 12-the second seal washer, the 13-the second oil return duct, the 14-the three seal washer, the 15-the three oil return duct, 16-cone
Shape hole.
Embodiment
In order to make the technical means, creative features, achievable purpose and effectiveness that invention is realized easy to understand, with reference to
Embodiment, the present invention is further explained.
The delivery valve holder on a kind of high-pressure oil pump as shown in Figures 1 and 2, has pedestal, and the both ends of pedestal are equipped with
Screw thread pair, is provided with delivery valve installation cavity in pedestal, one end of delivery valve installation cavity, which is located in pedestal, is also provided with oil outlet 1, described
Pedestal includes pedestal front end 2, pedestal rear end 3 and middle part reducer 4, the middle part reducer 4 with after pedestal front end 2, pedestal
End 3 is connected by thread fitting respectively, and the middle part reducer 4 includes outer barrel 5 and inner cylinder 6, and the inner cylinder 6 has
" convex " shape contour structure, and the inner cylinder 6 is threadedly coupled with outer barrel 5, the inner cylinder 6 including inside take in chamber 7 and
Top jet hole 8, the top jet hole 8 connect oil outlet 1, and it is rounded corner structure 9 that the inside, which takes 7 edge of chamber in, described
Inner cylinder 6 at 5 thread contact of outer barrel with being equipped with the first seal washer 10, and 10 side of the seal washer is provided through outer barrel
First oil return duct 11 of body 5.
In this example, the outer barrel 5 is equipped with the external screw thread coordinated with pedestal rear end 3, and outer barrel 5 and pedestal rear end
3 threaded connection places are equipped with the second seal washer 12, and 12 side of the second seal washer is equipped with the second oil return duct 13, and described
Second oil return duct 13 connects the first oil return duct 11 through outer barrel 5.This kind of structure, enables to fluid from second time
Oilhole road 13 flows into the first oil return duct 11, so as to concentrate outflow, while avoiding the fluid from wasting, also reduces the recycling of fluid
Cost.
In this example, the outer barrel 5 is equipped with the external screw thread coordinated with pedestal front end 2, and outer barrel 5 and pedestal front end
2 threaded connection places are equipped with the 3rd seal washer 14, and 14 side of the 3rd seal washer is equipped with the 3rd oil return hole of pedestal front end 2
Road 15.This kind of structure, can effectively avoid fluid from being flowed out from threaded connection place and waste.
In this example, the oil outlet 1 of the pedestal front end 2 is also provided with bellmouth 16, and the bellmouth 16 with it is fuel-displaced
Hole 1 is connected.The ejection of fluid can be facilitated, formation is vaporific, is conducive to the work of oil-burning machine.
This in the present invention kind delivery valve holder structure, for delivery valve holder fracture it is more sent out due to stress concentration phenomenon in
Delivery valve holder, is divided into pedestal front end, pedestal rear end and middle part and become by the phenomenon of middle part reducing tube body threadably
Footpath section, and the middle part reducer is made of outer barrel and inner cylinder, wherein, for delivery valve holder in the prior art because of inside
The machining trace of cavity is more easy to the problem of fatigue crack source occur, and the present invention internal cavity edge of taking in inner cylinder is equipped with circle
Chamfering structure, so that the present invention is not easy to crack source because inside cavity pressure is big in use, improves production
The service life of product.
Embodiment 1
A kind of high-pressure oil pump delivery valve holder processing technology provided by the present invention, its processing technology specifically include following step
Suddenly：
(1) casting mold is made according to the shape of outer barrel, pedestal front end and pedestal rear end respectively, and is opened up respectively on casting mold
Cast gate, is heated to 105 DEG C after casting mold then is coated coating, keeps the temperature 30min, then proceedes to be heated to 205 DEG C, keeps the temperature 50min；
The mold material is resin sand core；
(2) smelted to obtain cast raw material liquation using waste and old valve body material as cast raw material, added into casting liquation
Enter nodulizer spheroidising carry out spheroidising 6min, then after on cast raw material liquation dispense perlite slag making with purify casting
Make raw material liquation and skim at once；
(3) the cast raw material liquation for obtaining step (2) stands 18min, is then poured into the casting mold into step (1)
The blank of outer barrel, pedestal front end and pedestal rear end, pouring temperature are controlled at 1350 DEG C, and alterant is added in casting process；
(4) it will pour after the blank that outpours is cooled to room temperature, remove flash removed；
(5) inner cylinder raw material are chosen, it is cylindrical using centerless grinder mill inner cylinder, inner cylinder is ground using mesoporous seat surface grinding machine
Internal portion takes chamber in, is drilled using drilling machine to inner cylinder, gets top jet hole；
(6) obtained outer barrel, pedestal front end and pedestal rear end are subjected to normative heat treatment technique, table is carried out to inner cylinder
Face carburizing and quenching technique, concretely comprises the following steps：
Inner cylinder is placed in heating furnace, heating furnace rises to 870 DEG C with carburizing, carburizing time 2h from room temperature；By carburizing
Inner cylinder is accelerated to be cooled to room temperature by inner cylinder afterwards using air-cooled；Inner cylinder workpiece is again placed in heating furnace, heating furnace from
Room temperature rises to 870 DEG C with carburizing, carburizing time 3h；The inner cylinder workpiece after secondary carburizing is cooled to by the way of water quenching
Room temperature；After inner cylinder workpiece quenching, it is cooled to room temperature and is cleaned, finally carries out temper.
In this example, the inner cylinder raw material are 45 steel.
In this example, quenching and preserving heat temperature is 670 DEG C, soaking time 1h in the step (6), and quenching mode is oil
Quench.
In this example, tempering holding temperature is 650 DEG C in the step (6), and soaking time 1h, is air-cooled to room temperature.
Embodiment 2
A kind of high-pressure oil pump delivery valve holder processing technology, its processing technology specifically comprise the following steps：
(1) casting mold is made according to the shape of outer barrel, pedestal front end and pedestal rear end respectively, and is opened up respectively on casting mold
Cast gate, is heated to 115 DEG C after casting mold then is coated coating, keeps the temperature 40min, then proceedes to be heated to 215 DEG C, keeps the temperature 60min；
The mold material is resin sand core；
(2) smelted to obtain cast raw material liquation using waste and old valve body material as cast raw material, added into casting liquation
Enter nodulizer spheroidising carry out spheroidising 8min, then after on cast raw material liquation dispense perlite slag making with purify casting
Make raw material liquation and skim at once；
(3) the cast raw material liquation for obtaining step (2) stands 23min, is then poured into the casting mold into step (1)
The blank of outer barrel, pedestal front end and pedestal rear end, pouring temperature are controlled at 1380 DEG C, and alterant is added in casting process；
(4) it will pour after the blank that outpours is cooled to room temperature, remove flash removed；
(5) inner cylinder raw material are chosen, it is cylindrical using centerless grinder mill inner cylinder, inner cylinder is ground using mesoporous seat surface grinding machine
Internal portion takes chamber in, is drilled using drilling machine to inner cylinder, gets top jet hole；
(6) obtained outer barrel, pedestal front end and pedestal rear end are subjected to normative heat treatment technique, table is carried out to inner cylinder
Face carburizing and quenching technique, concretely comprises the following steps：
Inner cylinder is placed in heating furnace, heating furnace rises to 890 DEG C with carburizing, carburizing time 2h from room temperature；By carburizing
Inner cylinder is accelerated to be cooled to room temperature by inner cylinder afterwards using air-cooled；Inner cylinder workpiece is again placed in heating furnace, heating furnace from
Room temperature rises to 890 DEG C with carburizing, carburizing time 3h；The inner cylinder workpiece after secondary carburizing is cooled to by the way of water quenching
Room temperature；After inner cylinder workpiece quenching, it is cooled to room temperature and is cleaned, finally carries out temper.
In this example, the inner cylinder raw material are 45 steel.
In this example, quenching and preserving heat temperature is 680 DEG C, soaking time 2h in the step (6), and quenching mode is oil
Quench.
In this example, tempering holding temperature is 700 DEG C in the step (6), and soaking time 1.5h, is air-cooled to room
Temperature.
Based on above-mentioned, the present invention is carried out at classification pedestal front end, pedestal rear end and middle part reducer in processing technology
Reason, carries out local strengthening processing, to stress such as pedestal front end, pedestal rear ends to the middle part reducer of stress concentration during use
Homogeneous area, as casting raw material, reduces the material cost of Product processing, while pass through and strengthen using waste and old valve body material
Inner cylinder workpiece afterwards has higher case hardness, intensity and toughness, substantially increases the service life of inner cylinder workpiece, separately
Outside, the design of inner cylinder workpiece is more convenient to be replaced and is safeguarded, it is overall whole because of localized cracks source to avoid delivery valve holder
Body is scrapped.In addition, processing technology step of the present invention is simple, processing cost is relatively low, has wide applicability.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe the original of the present invention
Reason, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appending claims and equivalents circle
It is fixed.
Claims (5)
1. a kind of high-pressure oil pump delivery valve holder processing technology, it is characterised in that the delivery valve holder has a pedestal, in pedestal
Delivery valve installation cavity is provided with, one end of delivery valve installation cavity, which is located in pedestal, is also provided with oil outlet, before the pedestal includes pedestal
End, pedestal rear end and middle part reducer, the middle part reducer are connected by thread fitting respectively with pedestal front end, pedestal rear end
Connect, the middle part reducer includes outer barrel and inner cylinder, and the inner cylinder has " convex " shape contour structure, and the inner cylinder
It is threadedly coupled with outer barrel, the inner cylinder takes chamber and top jet hole in including inside, and the top jet hole connects out
Oilhole, it is rounded corner structure that the inside, which takes cavity edge in, and the inner cylinder is with being equipped with the first sealing at outer barrel thread contact
Packing ring, and the seal washer side is provided through the first oil return duct of outer barrel.
A kind of 2. high-pressure oil pump delivery valve holder processing technology according to claim 1, it is characterised in that the processing work
Skill specifically comprises the following steps：
(1) casting mold is made according to the shape of outer barrel, pedestal front end and pedestal rear end respectively, and opens up pour on casting mold respectively
Mouthful, 105-115 DEG C is heated to after casting mold then is coated coating, 30-40min is kept the temperature, then proceedes to be heated to 205-215 DEG C,
Keep the temperature 50-60min；The mold material is resin sand core；
(2) smelted to obtain cast raw material liquation using waste and old valve body material as cast raw material, ball is added into casting liquation
Agent spheroidising carry out spheroidising 6-8min, then after on cast raw material liquation dispense perlite slag making with purify casting
Raw material liquation is simultaneously skimmed at once；
(3) the cast raw material liquation for obtaining step (2) stands 18-23min, is then poured into the casting mold into step (1)
The blank of outer barrel, pedestal front end and pedestal rear end, pouring temperature control add rotten in 1350-1380 DEG C, casting process
Agent；
(4) it will pour after the blank that outpours is cooled to room temperature, remove flash removed；
(5) inner cylinder raw material are chosen, it is cylindrical using centerless grinder mill inner cylinder, ground using mesoporous seat surface grinding machine in inner cylinder
Portion takes chamber in, is drilled using drilling machine to inner cylinder, gets top jet hole；
(6) obtained outer barrel, pedestal front end and pedestal rear end are subjected to normative heat treatment technique, carrying out surface to inner cylinder oozes
Carbon quenching heat treatment technique, concretely comprises the following steps：
Inner cylinder is placed in heating furnace, heating furnace rises to 870-890 DEG C with carburizing, carburizing time 2h from room temperature；By carburizing
Inner cylinder is accelerated to be cooled to room temperature by inner cylinder afterwards using air-cooled；Inner cylinder workpiece is again placed in heating furnace, heating furnace from
Room temperature rises to 870-890 DEG C with carburizing, carburizing time 3h；It is by the way of water quenching that the inner cylinder workpiece after secondary carburizing is cold
But to room temperature；After inner cylinder workpiece quenching, it is cooled to room temperature and is cleaned, finally carries out temper.
A kind of 3. high-pressure oil pump delivery valve holder processing technology according to claim 2, it is characterised in that the inner cylinder
Raw material are 45 steel.
A kind of 4. high-pressure oil pump delivery valve holder processing technology according to claim 2, it is characterised in that the step
(6) quenching and preserving heat temperature is 670-680 DEG C, soaking time 1-2h in, and quenching mode is oil quenching.
A kind of 5. high-pressure oil pump delivery valve holder processing technology according to claim 2, it is characterised in that the step
(6) tempering holding temperature is 650-700 DEG C in, and soaking time 1-1.5h, is air-cooled to room temperature.
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| CN201711162372.4A CN107999704A (en) | 2017-11-21 | 2017-11-21 | A kind of high-pressure oil pump delivery valve holder processing technology |
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| CN201711162372.4A CN107999704A (en) | 2017-11-21 | 2017-11-21 | A kind of high-pressure oil pump delivery valve holder processing technology |
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| JP2011131225A (en) * | 2009-12-24 | 2011-07-07 | Ube Machinery Corporation Ltd | Injection device and injection controlling method of die casting machine |
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| CN202991314U (en) * | 2012-12-04 | 2013-06-12 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Split type damping fuel outlet valve |
| CN104728004A (en) * | 2013-12-20 | 2015-06-24 | 张慧 | Delivery valve pressing seat on diesel engine high-pressure oil pumps |
| CN104907498A (en) * | 2015-04-23 | 2015-09-16 | 苏州劲元油压机械有限公司 | Casting technology of hydraulic valve |
| CN105538072A (en) * | 2015-12-02 | 2016-05-04 | 无锡威孚马山油泵油嘴有限公司 | Double-end-surface polishing process of oil discharge valve base |
| CN107245690A (en) * | 2017-06-23 | 2017-10-13 | 江苏丰东热处理及表面改性工程技术研究有限公司 | A kind of carburizing quenching process |
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