CN105127681A - Cold extrusion molding technology for rotor of automobile brake vacuum booster pump - Google Patents
Cold extrusion molding technology for rotor of automobile brake vacuum booster pump Download PDFInfo
- Publication number
- CN105127681A CN105127681A CN201510514448.XA CN201510514448A CN105127681A CN 105127681 A CN105127681 A CN 105127681A CN 201510514448 A CN201510514448 A CN 201510514448A CN 105127681 A CN105127681 A CN 105127681A
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- China
- Prior art keywords
- blank
- mold core
- cold extrusion
- pump rotor
- carried out
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- 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.)
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Classifications
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/03—Making uncoated products by both direct and backward extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
- B21C25/025—Selection of materials therefor
-
- 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
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/50—Other automobile vehicle parts, i.e. manufactured in assembly lines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to the technical field of manufacturing of automobiles, in particular to a cold extrusion molding technology for a rotor of an automobile brake vacuum booster pump. The technology comprises the following steps of material preparation, wherein a round bar is cut according to the needed size to obtain a blank; heat treatment, wherein spheroidizing annealing treatment is carried out on the blank; machining, wherein the two end faces of the annealed blank are turned flatly and chamfered, then sand blasting and shot blasting treatment is carried out, and the surface of the blank is coated with saponified oil to be lubricated; and cold extrusion molding, wherein at room temperature, the blank is placed in a female mold, and one-time forward extrusion and one-time backward extrusion are carried out on the blank coated with the saponified oil to obtain an extrusion piece. The plasticity of the blank can be improved through spheroidizing annealing, and no crack can be generated to the blank in the extrusion process. Meanwhile, machining is carried out twice, operation is easy, and needed time is short.
Description
Technical field
The present invention relates to field of automobile, particularly relate to a kind of braking automobile vacuum servo pump rotor cold extrusion technology.
Background technology
Vacuum booster pump is mainly used in automobile energy assisted braking system extracting vacuum, also can be used for other haulage vehicle and engineering machinery.Adopt vacuum boosting braking system can improve braking feasibility and alleviate the fatigue of driver, being conducive to reducing driving accident incidence, improving vehicle security.Gasoline-powered vehicle, because engine adopts spark ignition type, therefore can produce higher vacuum pressure in air inlet pipe, can provide enough vacuum sources for vacuum boosting braking system, current vavuum pump is mostly connected on inlet manifold place.
In order to meet the gasoline direct injection engine that maximum discharge environmental requirement designs, the vacuum pressure of phase same level can not be provided at air inlet pipe place to meet the requirement of vacuum braking force aid system, therefore needing vavuum pump is installed.For the vehicle of diesel engine drives, because engine adopts compression-ignited, the vacuum pressure of phase same level can not be provided at air inlet pipe place, so vavuum pump will be installed provide vacuum source.The power of this vavuum pump directly obtains from engine, and power drives powder metallurgy rotor to drive plastic valve plate again by powder metallurgy shaft coupling, and rotor and pump chamber have certain offset, and the rotation of valve block produces vacuum, finally completes brake boost effect.This kind of vavuum pump is mainly developed in order to the petrol engine and Diesel engine that meet maximum discharge requirement, serves reduction of discharging effect.
Although powder metallurgy rotor flat recess and cross recess dimensionally stable, but exist always density not high, containing the not high defect of micro-crack, intensity, wearing and tearing, problems of crack is easily there is in use procedure, cause there is no vacuum, lose brake power-assisted, in case of emergency easily serious catastrophic failure occurs.Rotor made of steel just can avoid these problems, and some producer takes hot forging forming, but there is forging difficulty, and size is unstable, the problems such as follow-up machined cost is too high.
At present, need one badly and can ensure that size, steady quality, nothing or few mach technique are to produce brake vacuum assist pump rotor.
Summary of the invention
The object of the invention is to propose a kind of braking automobile vacuum servo pump rotor cold extrusion technology, can for reaching this object, the present invention by the following technical solutions:
A kind of braking automobile vacuum servo pump rotor cold extrusion technology, this technique comprises the following steps:
S101 gets the raw materials ready: round bar size is as required carried out cutting and obtains material base;
S102 heat treatment: described material base is carried out spheroidizing process;
S103 machined: by flat for the material base both ends of the surface car after annealing also chamfering; Then sandblasting Shot Blasting, and in material base surface coating saponified oil lubrication;
S104 is cold extrusion shaped: under room ambient conditions, is placed on by blank in die, does a forward extrusion and reverse extrusion obtains extrusion to the blank in step S103.
In an embodiment of the present invention, in step S102, during spheroidizing, heating temperatures is to 720-740 DEG C of insulation 5-6h, and be incubated 5-6h after being then down to 650 DEG C with stove, be again cooled to 550 DEG C with stove afterwards, sky of coming out of the stove is cooled to room temperature.
In an embodiment of the present invention, in step S103, the chamfering length of side is less than 2mm.
In an embodiment of the present invention, die in described step S104 comprises shrink ring and core rod, described shrink ring comprises outer ring and centre circle, described core rod, centre circle and outer ring set gradually and the coaxial heart of three from inside to outside, described core rod comprises the upper mold core and lower mold core that set gradually from top to bottom, described upper mold core and lower mold core are loop configuration, and are provided with in upper mold core in mobilizable upper punch and lower mold core and are also provided with low punch.
In an embodiment of the present invention, described upper punch is made up of powder steel ASP30 and high-speed steel SKH55 bi-material.
In an embodiment of the present invention, described upper mold core and lower mold core are obtained by carbide alloy.
Beneficial effect of the present invention is:
The plasticity of material base can be improved in the present invention by spheroidizing, make material base there will not be crackle in extrusion process; Twice machined in the present invention simultaneously, operation is comparatively simple and required time is shorter.
Accompanying drawing explanation
Fig. 1 is braking automobile vacuum servo pump rotor cold extrusion technology flow chart provided by the invention;
Fig. 2 is the structural representation of die provided by the invention.
1, circle stress; 2, core rod; 3, low punch; 4, upper punch; 11, outer ring; 12, centre circle; 21, upper mold core; 22, lower mold core.
Detailed description of the invention
In order to make those skilled in the art understand technical scheme of the present invention better, further illustrate technical scheme of the present invention below in conjunction with accompanying drawing by detailed description of the invention.
Disclose a kind of braking automobile vacuum servo pump rotor cold extrusion technology in the present embodiment, the obtained braking automobile vacuum booster pump rotor strength of this technique is high, and dimensionally stable and machined number of times, time are few.Please refer to Fig. 1, Fig. 1 is process chart of the present invention.
This technique comprises the following steps:
S101 gets the raw materials ready: round bar size is as required carried out cutting and obtains material base;
S102 heat treatment: described material base is carried out spheroidizing process;
S103 machined: by flat for the material base both ends of the surface car after annealing also chamfering; Then sandblasting Shot Blasting, and in material base surface coating saponified oil lubrication;
S104 is cold extrusion shaped: under room ambient conditions, is placed on by blank in die, does a forward extrusion and reverse extrusion obtains extrusion to the blank in step S103.
In the present embodiment in step s 102 spheroidizing time heating temperatures to 720-740 DEG C insulation 5-6h, be incubated 5-6h after being then down to 650 DEG C with stove, again lower the temperature 550 DEG C with stove afterwards, sky of coming out of the stove is cooled to room temperature.
In step S103, chamfering is less than C2, and namely the chamfering length of side is less than 2mm, and the object of chamfering is material base is entered in die smoothly, reduces the die-filling required time.
Please composition graphs 2, Fig. 2 be the structural representation of die in the present invention further, the left-half in figure be the schematic diagram before extruding, and figure right half part is extruded is the schematic diagram after rotor.
Die in step S104 comprises shrink ring 1 and core rod 2, described shrink ring 1 comprises outer ring 11 and centre circle 12, described core rod 2, centre circle 12 and outer ring 11 set gradually and the coaxial heart of three from inside to outside, described core rod 2 comprises the upper mold core 21 and lower mold core 22 that set gradually from top to bottom, described upper mold core 21 and lower mold core 22 are loop configuration, and are provided with in upper mold core 21 in mobilizable upper punch 4 and lower mold core 22 and are also provided with low punch 3.Be specially upper mold core and lower mold core is obtained by carbide alloy, can strengthen the hardness of upper mold core and lower mold core like this, the size of the rotor obtained after can ensureing punching press is better.
Because required drift hardness is comparatively large, upper punch 4 is made up of powder steel ASP30 and high-speed steel SKH55 bi-material, and the hardness of this bi-material is respectively in the scope of HRc64-66 and HRc62-64.
This technique is at room temperature carried out, and reduces energy consumption, and in this technique machined number of times and the time few, and machined is simple, is suitable for batch production, and saves manpower.Do not adopt traditional phospholeum process, protect environment, and the rotor size that this new technology is produced is stablized, and does not have the defects such as micro-crack, improves the security of brake system.
Note, above display and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not by the restriction of above-mentioned embodiment; what describe in above-mentioned embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (6)
1. a braking automobile vacuum servo pump rotor cold extrusion technology, is characterized in that, this technique comprises the following steps:
S101 gets the raw materials ready: round bar size is as required carried out cutting and obtains material base;
S102 heat treatment: described material base is carried out spheroidizing process;
S103 machined: by flat for the material base both ends of the surface car after annealing also chamfering; Then sandblasting Shot Blasting, and in material base surface coating saponified oil lubrication;
S104 is cold extrusion shaped: under room ambient conditions, is placed on by blank in die, does a forward extrusion and reverse extrusion obtains extrusion to the blank in step S103.
2. braking automobile vacuum servo pump rotor cold extrusion technology according to claim 1, it is characterized in that, in step S102 during spheroidizing heating temperatures to 720-740 DEG C, insulation 5-6h, then 5-6h is incubated after being down to 650 DEG C with stove, again be cooled to 550 DEG C with stove afterwards, sky of coming out of the stove is cooled to room temperature.
3. braking automobile vacuum servo pump rotor cold extrusion technology according to claim 1, it is characterized in that, in step S103, the chamfering length of side is less than 2mm.
4. according to the arbitrary described braking automobile vacuum servo pump rotor cold extrusion technology of claim 1-3, it is characterized in that, die in described step S104 comprises shrink ring (1) and core rod (2), described shrink ring (1) comprises outer ring (11) and centre circle (12), described core rod (2), centre circle (12) and outer ring (11) set gradually and the coaxial heart of three from inside to outside, described core rod (2) comprises the upper mold core (21) and lower mold core (22) that set gradually from top to bottom, described upper mold core (21) and lower mold core (22) are loop configuration, and be provided with in upper mold core (21) in mobilizable upper punch (4) and lower mold core (22) and be also provided with low punch (3).
5. braking automobile vacuum servo pump rotor cold extrusion technology according to claim 4, is characterized in that, described upper punch is made up of powder steel ASP30 and high-speed steel SKH55 bi-material.
6. braking automobile vacuum servo pump rotor cold extrusion technology according to claim 4, is characterized in that, described upper mold core (21) and lower mold core (22) are obtained by carbide alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510514448.XA CN105127681B (en) | 2015-08-20 | 2015-08-20 | Braking automobile vacuum servo pump rotor cold extrusion technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510514448.XA CN105127681B (en) | 2015-08-20 | 2015-08-20 | Braking automobile vacuum servo pump rotor cold extrusion technology |
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| CN105127681A true CN105127681A (en) | 2015-12-09 |
| CN105127681B CN105127681B (en) | 2018-03-20 |
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| CN201510514448.XA Active CN105127681B (en) | 2015-08-20 | 2015-08-20 | Braking automobile vacuum servo pump rotor cold extrusion technology |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001341A (en) * | 2016-06-17 | 2016-10-12 | 宾科汽车紧固件（昆山）有限公司 | Cold forging process for rotor and reverse hole extrusion die |
| CN107335723A (en) * | 2017-08-28 | 2017-11-10 | 陈志妹 | A kind of cylinder block of hydraulic pumps extrusion die |
| CN107829929A (en) * | 2017-10-24 | 2018-03-23 | 天津畅乐电子科技股份有限公司 | A kind of manufacturing process of brake system of car oil Pump rotor |
| CN108311622A (en) * | 2018-01-22 | 2018-07-24 | 宾科汽车紧固件（昆山）有限公司 | Vacuum generator rotor forming method in automobile engine |
| CN109570930A (en) * | 2018-12-07 | 2019-04-05 | 海盐猛凌汽车配件有限公司 | Rotor is from powder metallurgy to cold extruding formation process |
| CN112518239A (en) * | 2020-11-13 | 2021-03-19 | 浙江海洋大学 | Screw pump rotor rotary die extrusion forming process |
| CN113083937A (en) * | 2021-03-25 | 2021-07-09 | 江西红睿马钢管股份有限公司 | Production process of bearing steel pipe for cold-rolled expanded bearing |
| CN113941830A (en) * | 2021-09-15 | 2022-01-18 | 东风商用车有限公司 | Oil sprayer sleeve pipe manufacturing method and oil sprayer sleeve pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005870A (en) * | 2010-12-16 | 2011-04-06 | 镇江中虎弹簧有限公司 | Rotor manufacture process |
| CN102513792A (en) * | 2011-12-28 | 2012-06-27 | 上海久丰汽车零件有限公司 | Cold extrusion forming process for oil pump shaft for automobile |
| CN103111483A (en) * | 2013-02-01 | 2013-05-22 | 太仓久信精密模具有限公司 | High-modulus straight-tooth cylindrical gear cold extrusion technology and special die thereof |
| RU2498890C1 (en) * | 2012-10-23 | 2013-11-20 | Открытое акционерное общество Научно-производственное объединение "Искра" | Method of making helical rotor pump stator |
| CN103722065A (en) * | 2012-10-14 | 2014-04-16 | 江苏威鹰机械有限公司 | Finishing forming method of cylindrical shell of DOJ constant velocity universal joint and finishing male die of cylindrical shell of DOG constant velocity universal joint |
-
2015
- 2015-08-20 CN CN201510514448.XA patent/CN105127681B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005870A (en) * | 2010-12-16 | 2011-04-06 | 镇江中虎弹簧有限公司 | Rotor manufacture process |
| CN102513792A (en) * | 2011-12-28 | 2012-06-27 | 上海久丰汽车零件有限公司 | Cold extrusion forming process for oil pump shaft for automobile |
| CN103722065A (en) * | 2012-10-14 | 2014-04-16 | 江苏威鹰机械有限公司 | Finishing forming method of cylindrical shell of DOJ constant velocity universal joint and finishing male die of cylindrical shell of DOG constant velocity universal joint |
| RU2498890C1 (en) * | 2012-10-23 | 2013-11-20 | Открытое акционерное общество Научно-производственное объединение "Искра" | Method of making helical rotor pump stator |
| CN103111483A (en) * | 2013-02-01 | 2013-05-22 | 太仓久信精密模具有限公司 | High-modulus straight-tooth cylindrical gear cold extrusion technology and special die thereof |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001341A (en) * | 2016-06-17 | 2016-10-12 | 宾科汽车紧固件（昆山）有限公司 | Cold forging process for rotor and reverse hole extrusion die |
| CN107335723A (en) * | 2017-08-28 | 2017-11-10 | 陈志妹 | A kind of cylinder block of hydraulic pumps extrusion die |
| CN107829929A (en) * | 2017-10-24 | 2018-03-23 | 天津畅乐电子科技股份有限公司 | A kind of manufacturing process of brake system of car oil Pump rotor |
| CN108311622A (en) * | 2018-01-22 | 2018-07-24 | 宾科汽车紧固件（昆山）有限公司 | Vacuum generator rotor forming method in automobile engine |
| CN109570930A (en) * | 2018-12-07 | 2019-04-05 | 海盐猛凌汽车配件有限公司 | Rotor is from powder metallurgy to cold extruding formation process |
| CN112518239A (en) * | 2020-11-13 | 2021-03-19 | 浙江海洋大学 | Screw pump rotor rotary die extrusion forming process |
| WO2022100762A1 (en) * | 2020-11-13 | 2022-05-19 | 浙江海洋大学 | Rotary die extrusion molding process using screw pump rotor |
| US20230211398A1 (en) * | 2020-11-13 | 2023-07-06 | Zhejiang Ocean University | Rotary mold extrusion molding process of screw pump rotor |
| US11731180B2 (en) * | 2020-11-13 | 2023-08-22 | Zhejiang Ocean University | Rotary mold extrusion molding process of screw pump rotor |
| CN113083937A (en) * | 2021-03-25 | 2021-07-09 | 江西红睿马钢管股份有限公司 | Production process of bearing steel pipe for cold-rolled expanded bearing |
| CN113083937B (en) * | 2021-03-25 | 2023-03-24 | 江西红睿马钢管股份有限公司 | Production process of bearing steel pipe for cold-rolled expanded bearing |
| CN113941830A (en) * | 2021-09-15 | 2022-01-18 | 东风商用车有限公司 | Oil sprayer sleeve pipe manufacturing method and oil sprayer sleeve pipe |
Also Published As
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| CN105127681B (en) | 2018-03-20 |
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Address after: 200120 North Side of Floor 2, No. 258 Kangwu Road, Kangqiao Town, Pudong New District, Shanghai Patentee after: Shanghai Jiujing Automobile Parts Co., Ltd. Address before: 201315 North Side of Floor 2, No. 258 Kangwu Road, Kangqiao Town, Pudong New District, Shanghai Patentee before: Shanghai Jiu Jin precision forging Co., Ltd |
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Effective date of registration: 20190624 Address after: 215400 Kaiming Science and Technology Park, 88 Zhengdong Road, Taicang City, Suzhou City, Jiangsu Province Patentee after: TAICANG JIUXIN PRECISION MOLD CO., LTD. Address before: 200120 North Side of Floor 2, No. 258 Kangwu Road, Kangqiao Town, Pudong New District, Shanghai Patentee before: Shanghai Jiujing Automobile Parts Co., Ltd. |