CN102528406A - Method for processing automobile synchronizer gear ring blank - Google Patents

Method for processing automobile synchronizer gear ring blank Download PDF

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Publication number
CN102528406A
CN102528406A CN2012100648265A CN201210064826A CN102528406A CN 102528406 A CN102528406 A CN 102528406A CN 2012100648265 A CN2012100648265 A CN 2012100648265A CN 201210064826 A CN201210064826 A CN 201210064826A CN 102528406 A CN102528406 A CN 102528406A
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CN
China
Prior art keywords
blank
gear ring
finished
processing
ring blank
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Application number
CN2012100648265A
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Chinese (zh)
Inventor
江国辉
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江国辉
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Priority to CN2012100648265A priority Critical patent/CN102528406A/en
Publication of CN102528406A publication Critical patent/CN102528406A/en

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Abstract

The invention discloses a method for processing an automobile synchronizer gear ring blank. The method comprises the following steps of: blanking, heating, removing an oxide scale, upsetting, punching, flattening the end face of a blanked material, performing rough rolling, performing finish rolling, shaping and normalizing and removing surface oxidized skins and furs. According to the method for processing the automobile synchronizer gear ring blank, round steel is used as a billet, so that the precision of a casting can be improved, the subsequent machining allowance is reduced, and the production efficiency is improved; and meanwhile, the original round steel forging is improved, namely the conventional expansion is divided into finish rolling and rough rolling, so that the precision of the blank is improved, and can be controlled within 0.5 millimeters.

Description

A kind of processing method of gear ring blank for automobile synchronizer

Technical field

The present invention relates to a kind of processing method of gear ring blank for automobile synchronizer.

Background technology

The automobile synchronizer gear ring is one of important spare part in the automobile variable speed mechanism; Directly have influence on the cruising of automobile and driver and crew's personal safety in its crudy, structure, service life etc.; Domestic Automotive Industry is started late, and its blank forging process technology is comparatively backward, as the interior empty thin-walled gear ring blank of synchro converter ring and so on; Owing to adopt traditional forging method to be difficult to reach the blank size requirement; Can only adopt steel pipe in the actual production is raw material, and traditional ring-shaped work pieces reaming spreading technology is blank with the bar, and its mould is made complicacy, service life is low, equipment requirements is high; Particularly receiving its key technical index is the restriction (minimum reaming is than necessary K>l.5) of minimum reaming ratio; For the ring blank of empty thin-walled in some, because its minimum reaming < l.5, adopts traditional reaming spreading method to process than K.This just makes its practical application receive very big restriction, therefore, only in minority special industries such as bearing processing, uses in China.In view of the suffered restriction of traditional spreading expanding method; It is that raw material is produced that present general synchronized gear ring blank generally adopts steel pipe; But with the steel pipe is that blank mainly exists following deficiency: (1) Hyundai Motor industrial products model is many; Update speed is fast, and is many to the specification of thin-walled gear ring demand.But China's existing tubing specification limited amount, this is compelled to select the tubing of big specification with regard to the thin-walled gear ring that has caused some specification because of the tube billet that can't choose suitable surplus, thereby has caused unnecessary waste of material; (2) the steel pipe raw material is because its internal fiber is organized comparatively evacuates, and distortion is big after the part heat treatment of blank processing, comprehensive mechanical performance is shorter service life poor, part.With the steel pipe is that raw material are superseded basically now; The technology that now mostly adopts blanking, jumping-up, punching, expansion to be shaped is forged gear ring blank; Though it is raw-material many drawbacks that this technology has solved with steel pipe; But the rough forging ratio of precision is lower, so need a kind of new technology to improve the precision of blank.

Summary of the invention

The invention provides a kind of processing method of gear ring blank for automobile synchronizer, this method can improve the precision of forging, has reduced follow-up machining allowance, has improved production efficiency.

The present invention has adopted following technical scheme: a kind of processing method of gear ring blank for automobile synchronizer; May further comprise the steps: a, blanking; Size according to the finished product gear ring blank is calculated its nt wt net weight; On the basis of this nt wt net weight, confirm cutting stock weight, confirm round steel diameter and cutting length, so round steel is cut into the blank of Len req with sawing machine; B, heating are put into heating furnace with blank and are heated to 1150~1200 ℃ and wait to forge; C, descale take out blank from heating furnace, under 1150 ~ 1180 ℃ of temperature, remove the oxide skin at blank two ends with punch press; D, jumping-up adopt the punch press jumping-up with blank under 1100~1150 ℃ of temperature, the height of blank is selected corresponding heading die for use behind at first definite jumping-up, on punch press, carries out compression process then; E, punching; Under 1050~1100 ℃ of temperature, the prefabricated blank of being with blind hole is processed in the blank punching press behind the jumping-up; Choose suitable reaming axle diameter, confirm the aperture of prefabricated blank blind hole, the blind hole bottom surface is to the thickness of prefabricated blank bottom surface and the thickness of prefabricated blank sidewall; Select corresponding punching die for use, on punch press, carry out punching processing; F, blanking planar end surface; Under 1000~1050 ℃ of temperature; Keep the aperture of prefabricated blank blind hole constant, select for use the smooth mould of corresponding blanking that the bottom gross weight of blind hole is dashed and remove, form centre bore; Simultaneously with punch press with prefabricated blank punching press to the height suitable with the finished product gear ring blank, process the smooth blank in upper and lower end face; G, the thick rolling are expanded, and under 950~1000 ℃ of temperature, keep the height of blank constant, with Ring Rolling Machine blank are expanded processing, process drip molding, the inside and outside footpath size of drip molding and finished product gear ring blank suitable; H, the smart rolling are expanded, and under 950~1000 ℃ of temperature, to the moulding once more of thick rolling blank, carry out precision and roll over expansion, reduce allowance and make surplus remain on 0.5mm; The sizing die that adapts with finished product gear ring blank specification is selected in i, shaping for use, under 800~900 ℃ of temperature, drip molding is carried out shaping and handles, and makes the finished product gear ring blank; After j, above-mentioned trimming are accomplished, the finished product gear ring blank is put into normalizing furnace, be heated to 920~970 ℃; Carry out normalized treatment, the normalizing operation is cooled to 600 ℃ with the finished product gear ring blank after accomplishing; After tempering furnace isothermal a period of time, be chilled to room temperature, carry out Shot Blasting again; Remove surface scale and burr, improve the cleannes of finished product blank.

Size according to the finished product gear ring blank in the said blanking process is calculated its nt wt net weight; Add that on the basis of this nt wt net weight fire consumption 2%~5% and punching recess consume 80~250 grams; Confirm cutting stock weight, <under 2.5 the condition, confirm round steel diameter and cutting length satisfying cutting length/>round steel diameter; Heating furnace is selected the low-pressure fuel gas stove for use in the said heating process; Select 125T punch press jumping-up in the said upsetting process for use; According to the percent thermal shrinkage of material, well width is that the roll milling wheel of 52. 5mm is processed in selecting for use in the said thick rolling expansion process; The roll milling wheel that said essence is rolled over and selected interior well width in the expansion process for use is 60mm is processed; The finished product gear ring blank is chilled to room temperature in the said normalizing process behind tempering furnace isothermal 3h.

The present invention has following beneficial effect: the processing method of this gear ring blank for automobile synchronizer provided by the invention; This method is the precision that blank can improve forging with the round steel, has reduced follow-up machining allowance, has improved production efficiency; Simultaneously of the present inventionly on the basis that original round steel forges, improve; Original expansion moulding has been divided into smart rolling has expanded, slightly roll over and expand, improved the precision of blank like this, can be controlled within the 0.5mm.

Description of drawings

Fig. 1 is a process chart of the present invention.

The specific embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is described further:

Embodiment 1, and is as shown in Figure 1, when being the gear ring blank for automobile synchronizer of blank processing Φ 265mm * Φ 220mm * 90mm specification with round steel 20CrMnTi; Undertaken by following operation: a, blanking, calculate its nt wt net weight, i.e. nt wt net weight=density * volume=7 according to the size of finished product gear ring blank; 85 * 3.14 * 0.09 * (265 * 265-220 * 220)/4=, 12104 grams add i.e. 1730 grams of fire consumption 5% on the basis of nt wt net weight 12014 grams, add punching recess and consume 200 grams; Confirm that cutting stock weight is 14034 grams; Selecting diameter for use is the round steel of 110mm, and calculating cutting length is 188mm, is sawn into the long blank of 188mm to round steel with sawing machine;

B, heating are put into the low-pressure fuel gas stove with blank and are heated to 1160 ℃ and wait to forge;

C, descale take out blank from gas furnace, under 1150 ℃ of temperature, remove the oxide skin at blank two ends with the 60T punch press, to guarantee final finished blank unfolded, slag inclusion and crackle;

D, jumping-up confirm that the height behind the jumping-up is 60mm, according to the height of blank behind the jumping-up, select corresponding heading die for use, and blank is adopted 125T punch press jumping-up under 1120 ℃ of temperature, and the blank behind the jumping-up is concordant basically dolioform in upper and lower end face;

E, punching; According to situation such as finished product gear ring blank inside and outside circle cross sectional shape, base mode, rolling ring temperature, reaming spreading power, shaping equipment abilities; Choose suitable reaming axle diameter; Choosing the reaming axle diameter in this example is 45mm, confirms that thus prefabricated blank internal diameter is 48mm, makes prefabricated blank blind hole can install on the reaming mandrel smoothly;

F, blanking planar end surface, this step is confirmed the height of blank, and it is equated with the finished product gear ring blank basically; The percent thermal shrinkage of considering material confirms that the width of Ring Rolling Machine roll milling wheel is 60mm about 1%, choose the smooth mould of corresponding blanking; Under 1020 ℃ of temperature, keep the aperture of prefabricated blank blind hole constant, with the 125T punch press bottom gross weight of blind hole is dashed and remove; Form centre bore, with the height of prefabricated blank punching press, process the smooth blank in upper and lower end face simultaneously to 60mm;

G, the thick rolling are expanded, and according to the percent thermal shrinkage of material, well width is the roll milling wheel of 52. 5mm in selecting for use, under 960 ℃ of temperature, keep the height of blank constant, with Ring Rolling Machine blank are expanded processing, and processing external diameter is that 270mm, internal diameter are the drip molding of 210mm;

H, the smart rolling are expanded, and well width is the roll milling wheel of 60mm in selecting for use, under 960 ℃ of temperature, keep the height of blank constant, with Ring Rolling Machine blank are expanded processing, and processing external diameter is that 265mm, internal diameter are the drip molding of 220mm;

The sizing die that adapts with finished product gear ring blank specification is selected in i, shaping for use, under 820 ℃ of temperature, drip molding is carried out shaping and handles, and makes the finished product gear ring blank.Handle the geometric accuracy that has further improved the finished product blank through shaping;

After j, above-mentioned trimming are accomplished, the finished product gear ring blank is put into normalizing furnace, carry out isothermal normalizing and handle; Be heated to 930 ℃, be cooled to 600 ℃ of isothermals after the insulation 3 hours, the air cooling of coming out of the stove; To eliminate forging stress, be convenient to machining, carry out ball blast at last; Remove surface scale and burr, improve the cleannes of finished product blank.

Claims (7)

1. the processing method of a gear ring blank for automobile synchronizer is characterized in that may further comprise the steps:
A, blanking are calculated its nt wt net weight according to the size of finished product gear ring blank, on the basis of this nt wt net weight, confirm cutting stock weight, confirm round steel diameter and cutting length, so with sawing machine round steel are cut into the blank of Len req;
B, heating are put into heating furnace with blank and are heated to 1150~1200 ℃ and wait to forge;
C, descale take out blank from heating furnace, under 1150 ~ 1180 ℃ of temperature, remove the oxide skin at blank two ends with punch press;
D, jumping-up adopt the punch press jumping-up with blank under 1100~1150 ℃ of temperature, the height of blank is selected corresponding heading die for use behind at first definite jumping-up, on punch press, carries out compression process then;
E, punching; Under 1050~1100 ℃ of temperature, the prefabricated blank of being with blind hole is processed in the blank punching press behind the jumping-up; Choose suitable reaming axle diameter, confirm the aperture of prefabricated blank blind hole, the blind hole bottom surface is to the thickness of prefabricated blank bottom surface and the thickness of prefabricated blank sidewall; Select corresponding punching die for use, on punch press, carry out punching processing;
F, blanking planar end surface; Under 1000~1050 ℃ of temperature; Keep the aperture of prefabricated blank blind hole constant, select for use the smooth mould of corresponding blanking that the bottom gross weight of blind hole is dashed and remove, form centre bore; Simultaneously with punch press with prefabricated blank punching press to the height suitable with the finished product gear ring blank, process the smooth blank in upper and lower end face;
G, the thick rolling are expanded, and under 950~1000 ℃ of temperature, keep the height of blank constant, with Ring Rolling Machine blank are expanded processing, process drip molding, the inside and outside footpath size of drip molding and finished product gear ring blank suitable;
H, the smart rolling are expanded, and under 950~1000 ℃ of temperature, to the moulding once more of thick rolling blank, carry out precision and roll over expansion, reduce allowance and make surplus remain on 0.5mm;
The sizing die that adapts with finished product gear ring blank specification is selected in i, shaping for use, under 800~900 ℃ of temperature, drip molding is carried out shaping and handles, and makes the finished product gear ring blank;
After j, above-mentioned trimming are accomplished, the finished product gear ring blank is put into normalizing furnace, be heated to 920~970 ℃; Carry out normalized treatment, the normalizing operation is cooled to 600 ℃ with the finished product gear ring blank after accomplishing; After tempering furnace isothermal a period of time, be chilled to room temperature, carry out Shot Blasting again; Remove surface scale and burr, improve the cleannes of finished product blank.
2. the processing method of a kind of gear ring blank for automobile synchronizer according to claim 1; It is characterized in that the size according to the finished product gear ring blank is calculated its nt wt net weight in the said blanking process; Add that on the basis of this nt wt net weight fire consumption 2%~5% and punching recess consume 80~250 grams; Confirm cutting stock weight, <under 2.5 the condition, confirm round steel diameter and cutting length satisfying cutting length/>round steel diameter.
3. the processing method of a kind of gear ring blank for automobile synchronizer according to claim 1 is characterized in that heating furnace is selected the low-pressure fuel gas stove for use in the said heating process.
4. the processing method of a kind of gear ring blank for automobile synchronizer according to claim 1 is characterized in that selecting for use in the said upsetting process 125T punch press jumping-up.
5. the processing method of a kind of gear ring blank for automobile synchronizer according to claim 1 is characterized in that in the said thick rolling expansion process according to the percent thermal shrinkage of material, and well width is that the roll milling wheel of 52. 5mm is processed in selecting for use.
6. the processing method of a kind of gear ring blank for automobile synchronizer according to claim 1 is characterized in that selecting interior well width for use in the said smart rolling expansion process roll milling wheel that is 60mm to process.
7. the processing method of a kind of gear ring blank for automobile synchronizer according to claim 1 is characterized in that the finished product gear ring blank is chilled to room temperature in the said normalizing process behind tempering furnace isothermal 3h.
CN2012100648265A 2012-03-13 2012-03-13 Method for processing automobile synchronizer gear ring blank CN102528406A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102759423A (en) * 2012-08-04 2012-10-31 玉环县金峰实业有限公司 Gear ring of non-contactable torque sensor and processing method thereof
CN103350177A (en) * 2013-07-08 2013-10-16 芜湖市明远轴承锻造有限公司 Bearing twice-broaching process
CN103736838A (en) * 2013-12-26 2014-04-23 晋西铁路车辆有限责任公司 Machining method for backstop blank
CN104259745A (en) * 2014-07-28 2015-01-07 中国南方航空工业(集团)有限公司 Forming method of annular forge piece with flange side and mould used for implementing forming method
CN104439939A (en) * 2014-11-07 2015-03-25 通裕重工股份有限公司 Integrated forming method for large pipe molds
CN104690556A (en) * 2014-12-19 2015-06-10 东莞市辉科自动化科技有限公司 Full-automatic bearing production line adopting forging manipulators
CN104923708A (en) * 2015-06-09 2015-09-23 柳州科尔特锻造机械有限公司 Method for forging and producing gear ring
CN105033573A (en) * 2015-06-09 2015-11-11 柳州科尔特锻造机械有限公司 Driven bevel gear forging method
CN105537863A (en) * 2015-12-02 2016-05-04 四川民盛特钢锻造有限公司 Forging method of inner and outer rings of variable speed bearing of fan
CN105855817A (en) * 2016-06-07 2016-08-17 株洲齿轮有限责任公司 Cylindrical finish turning blank special for producing planetary gear and machining method thereof
CN106271470A (en) * 2016-08-02 2017-01-04 盐城市鑫海机械有限公司 A kind of processing method of balance shaft gear
CN107097047A (en) * 2017-05-17 2017-08-29 江苏昊鹏机械有限公司 The processing method of automobile hub bearing high rigidity inner ring flange
CN107350730A (en) * 2016-05-09 2017-11-17 南京晨伟机械设备制造有限公司 A kind of processing technology of valve seat
CN107876675A (en) * 2017-11-21 2018-04-06 四川凯茨阀门制造有限公司 A kind of flanged ball valve manufacture method
CN107876672A (en) * 2017-11-21 2018-04-06 四川凯茨阀门制造有限公司 A kind of flanged ball valve end cap rolling ring manufacturing process

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1963260A (en) * 2006-11-22 2007-05-16 重庆长风精化毛坯有限责任公司 Gear ring blank for automobile synchronizer and method for processing same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1963260A (en) * 2006-11-22 2007-05-16 重庆长风精化毛坯有限责任公司 Gear ring blank for automobile synchronizer and method for processing same

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102759423A (en) * 2012-08-04 2012-10-31 玉环县金峰实业有限公司 Gear ring of non-contactable torque sensor and processing method thereof
CN102759423B (en) * 2012-08-04 2015-02-18 玉环县金峰实业有限公司 Gear ring of non-contactable torque sensor and processing method thereof
CN103350177A (en) * 2013-07-08 2013-10-16 芜湖市明远轴承锻造有限公司 Bearing twice-broaching process
CN103736838A (en) * 2013-12-26 2014-04-23 晋西铁路车辆有限责任公司 Machining method for backstop blank
CN104259745B (en) * 2014-07-28 2018-01-09 中国南方航空工业(集团)有限公司 A kind of forming method of annular forging piece with flange and the mould used
CN104259745A (en) * 2014-07-28 2015-01-07 中国南方航空工业(集团)有限公司 Forming method of annular forge piece with flange side and mould used for implementing forming method
CN104439939A (en) * 2014-11-07 2015-03-25 通裕重工股份有限公司 Integrated forming method for large pipe molds
CN104690556A (en) * 2014-12-19 2015-06-10 东莞市辉科自动化科技有限公司 Full-automatic bearing production line adopting forging manipulators
CN104923708A (en) * 2015-06-09 2015-09-23 柳州科尔特锻造机械有限公司 Method for forging and producing gear ring
CN105033573A (en) * 2015-06-09 2015-11-11 柳州科尔特锻造机械有限公司 Driven bevel gear forging method
CN105537863A (en) * 2015-12-02 2016-05-04 四川民盛特钢锻造有限公司 Forging method of inner and outer rings of variable speed bearing of fan
CN107350730A (en) * 2016-05-09 2017-11-17 南京晨伟机械设备制造有限公司 A kind of processing technology of valve seat
CN105855817A (en) * 2016-06-07 2016-08-17 株洲齿轮有限责任公司 Cylindrical finish turning blank special for producing planetary gear and machining method thereof
CN106271470A (en) * 2016-08-02 2017-01-04 盐城市鑫海机械有限公司 A kind of processing method of balance shaft gear
CN107097047A (en) * 2017-05-17 2017-08-29 江苏昊鹏机械有限公司 The processing method of automobile hub bearing high rigidity inner ring flange
CN107876675A (en) * 2017-11-21 2018-04-06 四川凯茨阀门制造有限公司 A kind of flanged ball valve manufacture method
CN107876672A (en) * 2017-11-21 2018-04-06 四川凯茨阀门制造有限公司 A kind of flanged ball valve end cap rolling ring manufacturing process

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