CN109848664A - A kind of automobile rear axle driven gear base forging forming method - Google Patents
A kind of automobile rear axle driven gear base forging forming method Download PDFInfo
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- CN109848664A CN109848664A CN201910133892.5A CN201910133892A CN109848664A CN 109848664 A CN109848664 A CN 109848664A CN 201910133892 A CN201910133892 A CN 201910133892A CN 109848664 A CN109848664 A CN 109848664A
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Abstract
The present invention proposes a kind of automobile rear axle driven gear base forging forming method, the size of blank is calculated according to Blank calculation formula, successively carry out bar blanking-heating-jumping-up-punching-punching the wad-blank pre-shaped-rolling molding-die forging shaping, the present invention carries out pre-shaped to blank, effectively avoids generating longitudinal flash defect；Height and upper surface angle to rolling mold optimize, and effectively avoid generating pit defect, improve production efficiency, reduce cost.
Description
Technical field
The invention belongs to the technical field of automotive driven wheel blank processing more particularly to a kind of automobile rear axle driven gear bases
Forging forming method.
Background technique
Driven wheel is an important driving parts on automobile, be widely used in heavy truck vehicle, light truck vehicle, car, motorcycle,
The fields such as minicar, demand are larger.The quality of its forging also directly affects the service life of driven gear, and automobile axle is driven
Wheel blank forging such as Fig. 1.Currently, the main production of automobile rear axle driven gear base is: bar blanking-heating-jumping-up-punching
Hole-punching the wad -- rolling forming.The shortcomings that technique, is:
(1) blank shape size design is unreasonable, causes to be easy to produce defect in rolling technical process.
(2) rolling forming be produce automobile axle driven wheel gear blank last production work step, driven wheel gear blank rolling at
Longitudinal flash easy to form and the defects of single side pit in shape.Longitudinal flash must be cut off with machining, processing difficulties, production
Low efficiency.
(3) it generates unilateral pit and then needs to increase blank machining allowance, need bilateral 5~6mm of machining allowance, stock utilization
It is not high.
Therefore, the automobile rear axle driven gear base forging molding process of a kind of avoidable longitudinal flash and pit is developed,
The part production efficiency is improved, cost is reduced and is of great significance.
Summary of the invention
The purpose of the present invention is to provide a kind of automobile rear axle driven gear base forging forming methods, make forge piece blank reheating and drive
The geomery of dynamic roller obtains design optimization, can effectively improve stock utilization, can also avoid forging during rolling
There is defect in part, improves forging quality.
The technical proposal adopted by the invention to solve the above technical problems is that: a kind of automobile rear axle driven gear base forging at
Shape method, which comprises the steps of:
S1) scale blanking: going out blanking volume according to part blank volume charging head costing bio disturbance and carry out scale blanking, according to
Blank calculation formula calculates the height and diameter of blank, and formula is as follows:
Wherein, dpFor blank diameter, vpFor blank volume.δ is fire consumption rate, and m is ratio of height to diameter, vfFor blank gross weight volume, vj
For blank volume, D is blank internal diameter, and b is blank gross weight height；
S2) blank heats: answering stove heating using the higher intermediate frequency inductance of the degree of automation, is heated to 1150 DEG C~1200
℃；
S3) blank jumping-up: the round bar that will warm up rolling forming temperature is sent into upsetter, and jumping-up is carried out；
S4 the blank after jumping-up) blank punching: is punched out technique；
S5) punching the wad: step (4) are accepted and carry out punching the wad technique；
S6) pre-shaped mold design: including pre-shaped punch-pin and pre-shaped cavity plate, pre-shaped punch-pin top center is equipped with convex
Platform, top surface outer rim are plane, and centre is concave surface, and concave surface angle with horizontal plane is β；
S7) blank pre-shaped: pre-shaped mold is mounted on press machine, and under, pre-shaped cavity plate exists pre-shaped punch-pin
On, press machine downlink completes first time pre-shaped；
S8) rolling mold design: forming height and upper surface angle including driven roller, core roller and baffle, to driven roller
γ is designed optimization, and the forming height of driven roller is processing gear forgings height L+a, the forming height of core roller and driven roller
Forming height is mutually all L+a, and the thin footpath height of core roller is l+c；
S9) rolling forms: by the blank after shaping in step (7), being placed in step (8) in rolling mold, is expanded
Hole technique；
S10) die forging shaping: the blank in step (9) being put into whole shaping mould and carries out final shaping, whole sizing die
Tool includes whole shaping terrace die, whole correcting die and ejector beam, and whole shaping terrace die is upper, and whole correcting die is under, press machine downlink,
Complete whole shaping.
According to the above scheme, end shaping terrace die bottom contour dimension described in step (10) is identical as forging inner hole, whole shaping
The top type groove size of cavity plate is identical as forging gabarit, and whole shaping terrace die type groove bottom through-hole and work are inserted at the top of the ejector beam
Part abuts against.
According to the above scheme, boss radius described in step (6) is D/2, and a height of boss is blank gross weight height b, and β takes 6.5 °
~7 °.
According to the above scheme, a takes 2~3mm, γ to take 2.4 °~3 ° in step (8), and c takes 1~1.5mm.
The beneficial effects of the present invention are: the present invention provides a kind of automobile rear axle driven gear base forging forming method, for
Automobile rear axle driven gear base carries out pre-shaped to blank before rolling molding, effectively avoids generating longitudinal flash defect.It is right
The height and upper surface angle of rolling mold optimize, and effectively avoid generating pit defect.Production efficiency is improved, is reduced
Cost.
Detailed description of the invention
Fig. 1 is the automobile rear axle driven gear forging piece schematic diagram of one embodiment of the invention.
Fig. 2 is forging schematic diagram after the lower gross weight of one embodiment of the invention.
Fig. 3 is the pre-shaped cavity plate schematic diagram of one embodiment of the invention.
Fig. 4 is the pre-shaped punch-pin schematic diagram of one embodiment of the invention.
Fig. 5 be one embodiment of the invention pre-shaped after blank main view.
Fig. 6 is the rolling original state schematic diagram of the rolling mold of one embodiment of the invention.
Fig. 7 is the rolling completion status schematic diagram of the rolling mold of one embodiment of the invention.
Fig. 8 is the status diagram of the whole shaping of one embodiment of the invention.
Specific embodiment
For a better understanding of the invention, the invention will be further described with reference to the accompanying drawings and examples.
A kind of automobile rear axle driven gear base forging molding process, comprising the following steps:
(1) scale blanking: automobile rear axle driven gear forging piece 1 is as shown in Figure 1 and Figure 2, according to part blank volume charging head
Costing bio disturbance goes out blanking volume and carries out scale blanking.According to Blank calculation formula:
Wherein, dpFor blank diameter, vpFor blank volume.δ is fire consumption rate, and m is ratio of height to diameter, vfFor blank gross weight volume, vj
For blank volume, D is blank internal diameter, and b is blank gross weight height.
(2) blank heats: answering stove heating using the higher intermediate frequency inductance of the degree of automation, is heated to 1150 °~1200 °
(3) blank jumping-up: the round bar that will warm up rolling forming temperature is sent into upsetter, and jumping-up is carried out.
(4) blank after jumping-up blank punching: is punched out technique.Punching hole diameter is 70mm, formed punch gradient is 6 °~
8 °, Web thickness is 5~7mm in punching operation.
(5) punching the wad: step (4) are accepted and carry out punching the wad technique.
(6) blank pre-shaped mold design: as shown in Figure 3, Figure 4, pre-shaped punch-pin 3 is to prevent inside diameter when shaping from subtracting
It is small, therefore central boss is set, since ring blank internal diameter is D, so setting central boss radius is D/2, a height of boss is hair
The height b of base gross weight 2, pre-shaped punch-pin tilt angle are β, and β takes 6.5 °~7 °, and 4 tilt angle of pre-shaped cavity plate is 0 °.
(7) blank shaping: the mold in step (6) is mounted on press machine, and punch-pin is under, and cavity plate is in upper, press machine
Downlink.First time pre-shaped is completed, blank 5 is as shown in Figure 5 after pre-shaped.
(8) rolling mold design: as shown in fig. 6, the forming height of driven roller 6 is that processing gear forgings height L+a, a take 2
~3mm and upper surface angle are γ, and γ takes 2.4 °~3 ° to be designed.The forming height of core roller 7 and the forming height of driven roller
It is mutually all L+a, the thin footpath height of core roller is l+c, and c takes 1~1.5mm, other sizes angle and Fig. 1 gear forgings dimension angle phase
Together.8 position of baffle is identical as driven roller lower end surface height.
(9) rolling forms: the blank after shaping in step (7) is placed in step (8) in rolling mold, by blank
It is put into core roller, and the position placed will be contacted with baffle, blank outer diameter is in the contact of driven roller internal diameter.Blank and driven roller
It is 0.7 with the coefficient of friction of core roller, driven roller is with autobiography speed 120r/s, with the speed of 3mm/s to vertical close core roller direction
Feeding carries out chambering process.Rolling technique is completed when moving to position as shown in Figure 7.
(10) die forging shaping: as shown in figure 8, mold moulding section is made of whole shaping terrace die 9 and whole correcting die 10, mould
Tool is mounted on press machine, and upper, the face blank O in step (9) is put into whole whole shaping terrace die by whole correcting die under under
In shape mold, press machine downlink.Carry out final shaping.Then ejector beam 11 ejects workpiece 12 upwards, completes shaping.
Claims (4)
1. a kind of automobile rear axle driven gear base forging forming method, which comprises the steps of:
S1) scale blanking: go out blanking volume according to part blank volume charging head costing bio disturbance and carry out scale blanking, according to blank
Calculation formula calculates the size of blank, and formula is as follows:
Wherein, dpFor blank diameter, vpFor blank volume.δ is fire consumption rate, and m is ratio of height to diameter, vfFor blank gross weight volume, vjFor hair
Green body product, D are blank internal diameter, and b is blank gross weight height；
S2) blank heats: answering stove heating using the higher intermediate frequency inductance of the degree of automation, is heated to 1150 DEG C~1200 DEG C；
S3) blank jumping-up: the round bar that will warm up rolling forming temperature is sent into upsetter, and jumping-up is carried out；
S4 the blank after jumping-up) blank punching: is punched out technique；
S5) punching the wad: step (4) are accepted and carry out punching the wad technique；
S6) pre-shaped mold design: including pre-shaped punch-pin and pre-shaped cavity plate, pre-shaped punch-pin top center is equipped with boss,
Top surface outer rim is plane, and centre is concave surface, and concave surface angle with horizontal plane is β；
S7) blank pre-shaped: pre-shaped mold is mounted on press machine, and pre-shaped punch-pin is under, and pre-shaped cavity plate is in upper, pressure
Power machine downlink completes first time pre-shaped；
S8) rolling mold design: including driven roller, core roller and baffle, forming height and upper surface angle γ to driven roller into
Row design optimization, the forming height of driven roller are processing gear forgings height L+a, the forming height of core roller and the molding of driven roller
Height is mutually all L+a, and the thin footpath height of core roller is l+c；
S9) rolling forms: the blank after shaping in step (7) being placed in step (8) in rolling mold, carries out reaming work
Skill；
S10) die forging shaping: the blank in step (9) being put into whole shaping mould and carries out final shaping, whole shaping mould packet
Include whole shaping terrace die, whole correcting die and ejector beam, for whole shaping terrace die upper, whole correcting die is under, press machine downlink, completes
Whole shaping.
2. a kind of automobile rear axle driven gear base forging forming method according to the claims 1, which is characterized in that step
Suddenly end shaping terrace die bottom contour dimension described in (10) is identical as forging inner hole, the top type groove size and forging of whole correcting die
Part gabarit is identical, and whole shaping terrace die type groove bottom through-hole is inserted at the top of the ejector beam and is abutted against with workpiece.
3. a kind of automobile rear axle driven gear base forging forming method according to the claims 1, which is characterized in that step
Suddenly boss radius described in (6) is D/2, and a height of boss is blank gross weight height b, and β takes 6.5 °~7 °.
4. a kind of automobile rear axle driven gear base forging forming method according to the claims 1, which is characterized in that step
Suddenly a takes 2~3mm, γ to take 2.4 °~3 ° in (8), and c takes 1~1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910133892.5A CN109848664A (en) | 2019-02-22 | 2019-02-22 | A kind of automobile rear axle driven gear base forging forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910133892.5A CN109848664A (en) | 2019-02-22 | 2019-02-22 | A kind of automobile rear axle driven gear base forging forming method |
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| CN109848664A true CN109848664A (en) | 2019-06-07 |
Family
ID=66898650
Family Applications (1)
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| CN201910133892.5A Pending CN109848664A (en) | 2019-02-22 | 2019-02-22 | A kind of automobile rear axle driven gear base forging forming method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112719174A (en) * | 2020-12-28 | 2021-04-30 | 江苏双环齿轮有限公司 | Forging process of main reduction gear for motor transmission system of new energy passenger car |
| CN113510212A (en) * | 2021-07-06 | 2021-10-19 | 山东威玛装备科技股份有限公司 | Pipe end upsetting process for titanium alloy drill pipe body |
| CN113618005A (en) * | 2021-08-27 | 2021-11-09 | 四川凯茨阀门制造有限公司 | Three-station quick-change blank making die for main reduction gear blank |
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| JP2000140979A (en) * | 1998-11-11 | 2000-05-23 | Nippon Koshuha Steel Co Ltd | Stepped shaft part and its production method |
| CN101966554A (en) * | 2010-10-18 | 2011-02-09 | 周祝道 | Method for manufacturing intermediate formed body of driven gear of rear axle of small and medium-sized automobile |
| CN101966553A (en) * | 2010-10-18 | 2011-02-09 | 周祝道 | Method for manufacturing rear axle driven gear of small and medium-sized automobile |
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| CN102581208A (en) * | 2012-02-21 | 2012-07-18 | 中国农业大学 | Method for precisely carrying out hot forging on driven spiral bevel gear of automobile rear axle |
| CN103769799A (en) * | 2014-01-28 | 2014-05-07 | 江苏保捷锻压有限公司 | Method for forging high cone stepped forging piece with axial hole |
| CN103846632A (en) * | 2014-02-11 | 2014-06-11 | 马鞍山市恒毅机械制造有限公司 | Forging method for driving screw bevel gear forge piece of automotive rear axle |
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000140979A (en) * | 1998-11-11 | 2000-05-23 | Nippon Koshuha Steel Co Ltd | Stepped shaft part and its production method |
| CN101966554A (en) * | 2010-10-18 | 2011-02-09 | 周祝道 | Method for manufacturing intermediate formed body of driven gear of rear axle of small and medium-sized automobile |
| CN101966553A (en) * | 2010-10-18 | 2011-02-09 | 周祝道 | Method for manufacturing rear axle driven gear of small and medium-sized automobile |
| CN102172734A (en) * | 2010-12-31 | 2011-09-07 | 莫亚夫 | Rolling blank making method for automobile transmission gear ring |
| CN102126136A (en) * | 2011-01-04 | 2011-07-20 | 武汉理工大学 | Automotive rear axle driven bevel gear blank forging production line |
| CN102513498A (en) * | 2011-12-27 | 2012-06-27 | 十堰园钧工贸有限公司 | Precise forging method for automobile driven spiral bevel gear |
| CN102581208A (en) * | 2012-02-21 | 2012-07-18 | 中国农业大学 | Method for precisely carrying out hot forging on driven spiral bevel gear of automobile rear axle |
| CN103769799A (en) * | 2014-01-28 | 2014-05-07 | 江苏保捷锻压有限公司 | Method for forging high cone stepped forging piece with axial hole |
| CN103846632A (en) * | 2014-02-11 | 2014-06-11 | 马鞍山市恒毅机械制造有限公司 | Forging method for driving screw bevel gear forge piece of automotive rear axle |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112719174A (en) * | 2020-12-28 | 2021-04-30 | 江苏双环齿轮有限公司 | Forging process of main reduction gear for motor transmission system of new energy passenger car |
| CN112719174B (en) * | 2020-12-28 | 2022-03-01 | 江苏双环齿轮有限公司 | Forging process of main reduction gear for motor transmission system of new energy passenger car |
| CN113510212A (en) * | 2021-07-06 | 2021-10-19 | 山东威玛装备科技股份有限公司 | Pipe end upsetting process for titanium alloy drill pipe body |
| CN113618005A (en) * | 2021-08-27 | 2021-11-09 | 四川凯茨阀门制造有限公司 | Three-station quick-change blank making die for main reduction gear blank |
| CN113618005B (en) * | 2021-08-27 | 2023-12-19 | 四川凯茨阀门制造有限公司 | Three-station quick-change blank making die for main reduction gear blank |
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Application publication date: 20190607 |