CN104148797B - The manufacture method of planetary wheel carrier - Google Patents

The manufacture method of planetary wheel carrier Download PDF

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Publication number
CN104148797B
CN104148797B CN201410398103.8A CN201410398103A CN104148797B CN 104148797 B CN104148797 B CN 104148797B CN 201410398103 A CN201410398103 A CN 201410398103A CN 104148797 B CN104148797 B CN 104148797B
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CN
China
Prior art keywords
forging
cover plate
wheel carrier
planetary wheel
base
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CN201410398103.8A
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Chinese (zh)
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CN104148797A (en
Inventor
赵海丁
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江苏南铸科技股份有限公司
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Priority to CN201410398103.8A priority Critical patent/CN104148797B/en
Publication of CN104148797A publication Critical patent/CN104148797A/en
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Publication of CN104148797B publication Critical patent/CN104148797B/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass

Abstract

The invention discloses the manufacture method of a kind of planetary wheel carrier, it comprises the steps: S1. blanking;S2. pre-treatment;S3. forging and molding;S4. trimming punching;S5. surface finish processing;S6. electron beam welding;S7. heat treatment.The manufacture method of the planetary wheel carrier of the present invention adopts Forging Technology to produce base and the cover plate of planetary wheel carrier respectively, and base and cover plate welding are fixed together by the mode welded by electron beam.The manufacture method yield rate of the present invention is high, and material is useless low.By the planetary wheel carrier interior solid that the manufacture method of the present invention produces, base and cover plate junction are comparatively firm, and without obvious weld seam.

Description

The manufacture method of planetary wheel carrier
Technical field
The present invention relates to a kind of auto parts and components and manufacture field, more particularly to the manufacture method of a kind of planetary wheel carrier for supporting fixing planetary gear.
Background technology
Planetary gear is widely used for a kind of parts in automobile and other industries, its speed being mainly used in controlling automobilism, plays the effect that speed regulates.When planetary gear uses, it is necessary to cooperate with planetary wheel carrier, planetary wheel carrier plays the effect to the fixing of planetary gear and support.
As it is shown in figure 1, planetary wheel carrier 100 includes base 10 and cover plate 20, cover plate 20 is fixed on above base 10.The installing space of planetary gear is formed between base 10 and cover plate 20.At present, the manufacture method of planetary wheel carrier is generally casting.Due to the defect of casting technique self, by easily producing crafters inside the planetary wheel carrier that casting method obtains, thus have impact on the quality of planetary wheel carrier, causing expecting that useless comparison is high, reducing the productivity effect of product.
Therefore, it is necessary to propose further solution.
Summary of the invention
In view of this, the invention provides the manufacture method of a kind of planetary wheel carrier, to overcome the defect existed in existing planetary wheel carrier manufacture process.
To achieve these goals, the present invention provides the manufacture method of a kind of planetary wheel carrier, described planetary wheel carrier to include base and cover plate, and the manufacture method of described planetary wheel carrier comprises the steps:
S1. blanking, it is provided that manufacture planetary wheel carrier base and cover plate raw material, corresponding raw material is processed to form respectively base embryo material and cover plate embryo material;
S2. pre-treatment, carries out pre-treatment by base embryo material and cover plate embryo material, improves the plasticity of the two;
S3. forging and molding, forges base embryo material and the cover plate embryo material through pre-treatment, forms base forging embryo and cover plate forging embryo;
S4. trimming punching, rim charge unnecessary around embryo forged by the base forging embryo and the cover plate that excise forging and molding respectively, and the base forging embryo after trimming and cover plate forging embryo are punched out;
S5. surface finish processing, is polished the surface of the base forging embryo after trimming and punching process and cover plate forging embryo, and is processed the two solder side processing, form base forging and cover plate forging;
S6. electron beam welding, base forging and cover plate forging are sent into the first drying room carries out isothermal holding, fixing by the two feeding vacuum tank utilizes frock clamp to carry out assembling again, the solder side making base forging and cover plate forging fits, in vacuum tank after evacuation, electron beam irradiation solder side place therebetween, complete electron beam welding, form planetary wheel carrier, the planetary wheel carrier of formation is sent in the second drying room and carries out secondary insulation;
S7. heat treatment, the planetary wheel carrier after being incubated by secondary enters oil after being heated to 800 DEG C, completes heat treatment, obtains the planetary wheel carrier of the present invention.
As the improvement of manufacture method of the planetary wheel carrier of the present invention, in described step S1, it is provided that the raw material manufacturing planetary wheel carrier base and cover plate be steel alloy.
As the improvement of manufacture method of the planetary wheel carrier of the present invention, in described step S2, described pre-treatment is heat treated, and the temperature of described heat treated is 1100 DEG C.
As the improvement of manufacture method of the planetary wheel carrier of the present invention, in described step S3, adopting multi-ram forging during forging and molding, the pressure of forging is 2500T.
As the improvement of manufacture method of the planetary wheel carrier of the present invention, described multi-ram forging at least has four forging directions.
As the improvement of manufacture method of the planetary wheel carrier of the present invention, in described step S4, pressure when trimming and punching is 1600T.
As the improvement of manufacture method of the planetary wheel carrier of the present invention, in described step S5, base is forged the solder side of embryo and cover plate forging embryo when being processed processing, it is ensured that the depth of parallelism of the two solder side is 0.05mm.
As the improvement of manufacture method of the planetary wheel carrier of the present invention, in described step S6, when carrying out isothermal holding in the first drying room, temperature retention time is 2-3h, and holding temperature is: 150~200 DEG C, and described vacuum tank is of a size of 1m × 1m;When carrying out isothermal holding in the second drying room, temperature retention time is 3h, and holding temperature is: 300~350 DEG C.
The improvement of manufacture method as the planetary wheel carrier of the present invention, in described step S6, in vacuum tank after evacuation, joint place between electron beam irradiation base forging and cover plate forging, irradiation time is 7-10min, during described electron beam irradiation, base forging and cover plate forging rotate, and make base forging and cover plate forging weld together completely under the irradiation of electron beam.
During the welding of described electron beam, voltage is 120~160kv, and electric current is 20~1000mA, and rate of scanning is 200~950Hz, and controls ripple factor less than 0.5%, and degree of stability maintains ± 0.5%.
As the improvement of manufacture method of the planetary wheel carrier of the present invention, in described step S7, the heat treated process time is 6-7h.
Compared with prior art, the invention has the beneficial effects as follows: the manufacture method of the planetary wheel carrier of the present invention adopts Forging Technology to produce base and the cover plate of planetary wheel carrier respectively, and base and cover plate welding are fixed together by the mode welded by electron beam.The manufacture method yield rate of the present invention is high, and material is useless low.By the planetary wheel carrier interior solid that the manufacture method of the present invention produces, base and cover plate junction are comparatively firm, and without obvious weld seam.
Accompanying drawing explanation
Fig. 1 is the sectional perspective schematic diagram of planetary wheel carrier;
Fig. 2 is the schematic flow sheet of a detailed description of the invention of the manufacture method of the planetary wheel carrier of the present invention;
Fig. 3 is the schematic perspective view after the planetary wheel carrier that the manufacture method to the planetary wheel carrier according to the present invention obtains carries out line cutting;
Fig. 4 is the profile of test sample;
Fig. 5 is the metallograph of test sample weld seam fusion place;
Fig. 6 is the metallograph of test sample mother metal part.
Detailed description of the invention
Technical scheme in the embodiment of the present invention will be described in detail below, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the premise not making creative work, broadly fall into the scope of protection of the invention.
As in figure 2 it is shown, the manufacture method of the planetary wheel carrier of the present invention comprises the steps:
S1. blanking, it is provided that manufacture planetary wheel carrier base and cover plate raw material, corresponding raw material is processed to form respectively base embryo material and cover plate embryo material;
S2. pre-treatment, carries out pre-treatment by base embryo material and cover plate embryo material, improves the plasticity of the two;
S3. forging and molding, forges base embryo material and the cover plate embryo material through pre-treatment, forms base forging embryo and cover plate forging embryo;
S4. trimming punching, rim charge unnecessary around embryo forged by the base forging embryo and the cover plate that excise forging and molding respectively, and the base forging embryo after trimming and cover plate forging embryo are punched out;
S5. surface finish processing, is polished the surface of the base forging embryo after trimming and punching process and cover plate forging embryo, and is processed the two solder side processing, form base forging and cover plate forging;
S6. electron beam welding, base forging and cover plate forging are sent into the first drying room carries out isothermal holding, fixing by the two feeding vacuum tank utilizes frock clamp to carry out assembling again, the solder side making base forging and cover plate forging fits, in vacuum tank after evacuation, electron beam irradiation solder side place therebetween, complete electron beam welding, form planetary wheel carrier, the planetary wheel carrier of formation is sent in the second drying room and carries out secondary insulation;
S7. heat treatment, the planetary wheel carrier after being incubated by secondary enters oil after being heated to 800 DEG C, completes heat treatment, obtains the planetary wheel carrier of the present invention.
Wherein, in described step S1, it is provided that the raw material manufacturing planetary wheel carrier base and cover plate preferably employ steel alloy, it is more preferred to, steel alloy is 45# steel or 40Cr steel.Wherein, 45# steel has higher intensity and good machinability, meets the process requirements of the manufacture method of the present invention.Additionally, during blanking, the raw-material consumption that makes need to be calculated, and utilizes the raw material cut-out that plant equipment will provide for be processed into the embryo material with given shape.
In described step S2, needed embryo material is carried out pre-treatment before forging, in order to increase the plasticity of base embryo material and cover plate embryo material, it is simple to follow-up forging processing.Described pre-treatment can be heat treated, and temperature during heat treated is 1100 DEG C.
In described step S3, forging and molding adopts the forging mode of multi-ram forging.Specifically, during die forging, base embryo material and cover plate embryo material are respectively put in corresponding forging mold, matched moulds under stress, forge base forging embryo and cover plate forging embryo, pressure during forging is preferably 2500T.In described multi-ram forging, at least there are four forging directions.Additionally, forge base forging embryo and cover plate forging embryo also needs through Overheating Treatment, heat treatment and tempering, its object is to increase the intensity forging base forging embryo and cover plate forging embryo.
In described step S4, pressure when trimming and punching is preferably 1600T.
In described step S5, during surface finish, use shot-blasting machine, base can be forged embryo by surface finish and cover plate forging embryo surface is optimized.During Surface Machining, the solder side that base is forged embryo and cover plate forging embryo is processed processing, thus the depth of parallelism of solder side is 0.05mm both ensureing, to meet the welding requirements during welding of Subsequent electronic bundle.
In described step S6, when carrying out isothermal holding in the first drying room, temperature retention time is preferably 2-3h, and holding temperature is: 150~200 DEG C.When carrying out isothermal holding in the second drying room, temperature retention time is 3h, and holding temperature is: 300~350 DEG C.
Specifically, vacuum tank in step S6 is of a size of 1m × 1m, described vacuum tank is provided with firm banking forging and the frock clamp of cover plate forging, this frock clamp can make base forging and cover plate forging be fixed in vacuum tank, and make base forging bonded to each other with the solder side of cover plate forging together with.Meanwhile, frock clamp also can drive the base forging fit together and cover plate forging to carry out spinning motion, and this spinning motion rotates with the central axis of base forging and cover plate forging for rotating shaft.So, when electron beam welds, electron beam can be made to be welded together completely by the solder side of base forging and cover plate forging.
In vacuum tank after evacuation, the solder side between electron beam irradiation base forging and cover plate forging, irradiation time is 7-10min.During electron beam irradiation, base forging and cover plate forging rotate under the clamping of fixture, and during rotation, base forging and cover plate forging rotate with its center axis for rotating shaft.So that the solder side between base forging and cover plate forging can be received by the irradiation of electron beam, and then base forging and cover plate forging is made to weld together completely.
Additionally, when carrying out electron beam welding, voltage is 120~160kv, and electric current is 20~1000mA, and rate of scanning is 200~950Hz, and controls ripple factor less than 0.5%, and degree of stability maintains ± 0.5%.
After base forging and cover plate forging complete electron beam welding in vacuum tank, form planetary wheel carrier.The planetary wheel carrier welded is sent into after the second drying room carries out secondary insulation, it is proceeded this heat treatment, thus increasing the intensity of the planetary wheel carrier of formation.Specifically, heat treatment time is 6-7h, and heat treatment temperature is 800 DEG C.Planetary wheel carrier after heat treatment enters oil to quench, thus reaching the standard of workpiece HB250.
Below the planetary wheel carrier of above-mentioned acquisition being carried out test experiments, this test experiments is tested according to GB/T13320-2007.In test experiments, inspection project specifically includes: hardness, metallographic structure and weld seam merge situation.
As shown in Figure 3,4, Fig. 3 is the schematic perspective view after the planetary wheel carrier to above-mentioned acquisition carries out line cutting, from the figure 3, it may be seen that planetary wheel carrier is cut into 4 parts, takes a copy of it as test sample.Fig. 4 is the profile of test sample, and wherein a-quadrant and B region are positioned at the both sides in C region, and a-quadrant is under mother metal, and B region is on mother metal, and C region is weld seam fusion place.
As shown in Figure 5,6, Fig. 5 is the metallograph of test sample weld seam fusion place, as shown in Figure 5 weld seam fusion place good knitting, welding defect.Fig. 6 is the metallograph of test sample mother metal part, it will be appreciated from fig. 6 that the internal pore-free of the planetary wheel carrier obtained by the manufacture method of the present invention, and comparatively dense.
Test sample carries out the detection of each project, and testing result is as shown in table 1:
Table 1
As shown in Table 1, the planetary wheel carrier hardness conformance with standard requirement obtained by the manufacture method of the present invention, tempered sorbite reaches 2 grades, thus the planetary wheel carrier obtained has good toughness and plasticity, there is higher intensity simultaneously, therefore there is good comprehensive mechanical property.Meanwhile, the weld fusion of base and cover plate is good, welding defect, and the intensity of fusion area has reached 252HB, conformance with standard requirement.
In sum, the manufacture method of the planetary wheel carrier of the present invention adopts Forging Technology to produce base and the cover plate of planetary wheel carrier respectively, and base and cover plate welding are fixed together by the mode welded by electron beam.The manufacture method yield rate of the present invention is high, and material is useless low.By the planetary wheel carrier interior solid that the manufacture method of the present invention produces, base and cover plate junction are comparatively firm, and without obvious weld seam.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when without departing substantially from the spirit of the present invention or basic feature, it is possible to realize the present invention in other specific forms.Therefore, no matter from which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the invention rather than described above limits, it is intended that all changes in the implication of the equivalency dropping on claim and scope included in the present invention.
In addition, it is to be understood that, although this specification is been described by according to embodiment, but not each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should be made as a whole by those skilled in the art, and the technical scheme in each embodiment through appropriately combined, can also form other embodiments that it will be appreciated by those skilled in the art that.

Claims (15)

1. a manufacture method for planetary wheel carrier, described planetary wheel carrier includes base and cover plate, it is characterised in that the manufacture method of described planetary wheel carrier comprises the steps:
S1. blanking, it is provided that manufacture planetary wheel carrier base and cover plate raw material, corresponding raw material is processed to form respectively base embryo material and cover plate embryo material, wherein, it is provided that the raw material manufacturing planetary wheel carrier base and cover plate be steel alloy, described steel alloy is 45# steel or 40Cr steel;
S2. pre-treatment, carries out pre-treatment by base embryo material and cover plate embryo material, improves the plasticity of the two;
S3. forging and molding, forges base embryo material and the cover plate embryo material through pre-treatment, forms base forging embryo and cover plate forging embryo, wherein, adopts multi-ram forging during forging and molding, and the pressure of forging is 2500T;
S4. trimming punching, rim charge unnecessary around embryo forged by the base forging embryo and the cover plate that excise forging and molding respectively, and the base forging embryo after trimming and cover plate forging embryo are punched out;
S5. surface finish processing, is polished the surface of the base forging embryo after trimming and punching process and cover plate forging embryo, and is processed the two solder side processing, form base forging and cover plate forging;
S6. electron beam welding, base forging and cover plate forging are sent into the first drying room carries out isothermal holding, fixing by the two feeding vacuum tank utilizes frock clamp to carry out assembling again, the solder side making base forging and cover plate forging fits, in vacuum tank after evacuation, electron beam irradiation solder side place therebetween, complete electron beam welding, form planetary wheel carrier, the planetary wheel carrier of formation is sent in the second drying room and carries out secondary insulation;
S7. heat treatment, the planetary wheel carrier after being incubated by secondary enters oil after being heated to 800 DEG C, completes heat treatment, obtains planetary wheel carrier.
2. the manufacture method of planetary wheel carrier according to claim 1, it is characterised in that in described step S2, described pre-treatment is heat treated, and the temperature of described heat treated is 1100 DEG C.
3. the manufacture method of planetary wheel carrier according to claim 1, it is characterised in that described multi-ram forging at least has four forging directions.
4. the manufacture method of planetary wheel carrier according to claim 1, it is characterised in that in described step S4, pressure when trimming and punching is 1600T.
5. the manufacture method of planetary wheel carrier according to claim 1, it is characterised in that in described step S5, to base forge embryo and cover plate forging embryo solder side be processed process time, it is ensured that the depth of parallelism of the two solder side is 0.05mm.
6. the manufacture method of planetary wheel carrier according to claim 1, it is characterised in that in described step S6, when carrying out isothermal holding in the first drying room, temperature retention time is 2-3h, and holding temperature is: 150~200 DEG C, and described vacuum tank is of a size of 1m × 1m;When carrying out isothermal holding in the second drying room, temperature retention time is 3h, and holding temperature is: 300~350 DEG C.
7. the manufacture method of planetary wheel carrier according to claim 1, it is characterized in that, in described step S6, in vacuum tank after evacuation, joint place between electron beam irradiation base forging and cover plate forging, irradiation time is 7-10min, during described electron beam irradiation, base forging and cover plate forging rotate, and make base forging and cover plate forging weld together completely under the irradiation of electron beam.
8. the manufacture method of planetary wheel carrier according to claim 1, it is characterised in that in described step S7, the heat treated process time is 6-7h.
CN201410398103.8A 2014-08-13 2014-08-13 The manufacture method of planetary wheel carrier CN104148797B (en)

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WO2018172945A1 (en) 2017-03-23 2018-09-27 Bharat Forge Limited A planet carrier and a process and apparatus to manufacture it

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CN105855814A (en) * 2016-05-26 2016-08-17 杭州太普机械科技有限公司 Split type planetary carrier and welding tool and machining technique thereof
CN110935994A (en) * 2019-11-07 2020-03-31 巨力索具股份有限公司 Welding manufacturing method of large cast-weld structure ring cable clamp

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WO2018172945A1 (en) 2017-03-23 2018-09-27 Bharat Forge Limited A planet carrier and a process and apparatus to manufacture it

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