CN102974742A - Processing method of movable fork - Google Patents
Processing method of movable fork Download PDFInfo
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- CN102974742A CN102974742A CN2012102995388A CN201210299538A CN102974742A CN 102974742 A CN102974742 A CN 102974742A CN 2012102995388 A CN2012102995388 A CN 2012102995388A CN 201210299538 A CN201210299538 A CN 201210299538A CN 102974742 A CN102974742 A CN 102974742A
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- 238000003672 processing method Methods 0.000 title claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 238000005242 forging Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000010791 quenching Methods 0.000 claims abstract description 8
- 238000010008 shearing Methods 0.000 claims abstract description 6
- 230000000171 quenching effect Effects 0.000 claims abstract description 5
- 238000005496 tempering Methods 0.000 claims abstract description 4
- 238000009413 insulation Methods 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000009826 distribution Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- Forging (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a processing method of a movable fork. The processing method comprises following procedures: a. cylinder-shaped blanks are poured, b. forging procedure: (1) a round bar with a diameter of 32mm is chosen and blanked by utilizing a shearing machine. The length d of a blanking piece after shearing is 80mm; (2) the blanking pieces is put into a medium frequency heating furnace and heated, a heating temperature is from 1120 degrees to 1180 degrees, and heating times are kept from 2.8 minutes to 4.2 minutes; (3) after the procedure two, a wokrpiece is obtained. The middle position of the workpiece is drawn out by using an air hammer, times of drawing out the hammer is from 8 times to 14 times; c. heat treatment procedure: (1) normalizing is carried out, the workpiece which passes through side shearing is heated to from 865 degrees to 875 degrees and kept warm around one hour; (2) quenching is carried out, the workpiece which passes through the normalizing is heated up to from 675 degrees to 685 degrees, kept warm around 30 minutes, continuously heated up to from 905 degrees to 915 degrees and kept warm around two hours; (3) tempering is carried out, and the workpiece which passes through the quenching is heated up to from 570 degrees to 620 degrees and kept warm around 5 hours. The processing method of the movable fork is favorable for a large batch of industrialized production, reducing the phenomena that dirt carrying and insufficient filling happen in the process of the forging, mechanics performance of a product can be further improved, using materials of the product is saved, and service life of a mold is prolonged.
Description
Technical field
The present invention relates to a kind of processing method of shift fork.
Background technology
Shift fork is the vital part on the automobile, because the particularity of its shape and the importance of serviceability thereof, thereby has increased the difficulty of its forging molding, all needs careful consideration in the selection of the distribution of material and technique.For this reason, the reasonable forging method of developing this forging also quite is subjected to domestic and international concern.
At present, the technological process of domestic shift fork forging routine is: heating, blocking, finish-forging, side cut, finishing.The shortcoming of this scheme is: need large tonnage pressing machine, energy consumption is large, stock utilization is low, causes the forging cost high.With the forging that technological process was produced of this scheme occur easily folder dirty, be not fully filled etc., the defective percent defective reaches 5%, and raw material availability only has 20-30%, owing to reasons such as overlap are excessive, the life-span of mould is also only about 5000-6000 spare.
Summary of the invention
The processing method that the purpose of this invention is to provide a kind of shift fork, make it be beneficial to large batch of industrialized production, and reduced the phenomenon that occurs the folder dirt in the forging process, is not fully filled, the mechanical property of product is further improved, save product materials, improved the die life of product.
The technical solution used in the present invention is as follows:
A kind of processing method of shift fork may further comprise the steps:
A, cast cylinder blank step
Chemical component weight percentage is in the cylinder blank: C 0.18-0.27%, Mn 1.1-2.0%, Si 0.6-1.2%, V 0.08-0.15%, Ti 0.11-0.2%, Cr 0.8-2.0%, Ni 0.5-1.5%, Mo 0.15～0.40%, W 0.1-0.8%, Nb 0.05-0.07%, Al 0.15～0.23%, Cu 0.15～0.50%, P≤0.030%, S≤0.030%, and surplus is Fe and inevitably is mingled with matter; Before cylinder blank behind the moulding by casting is not cooled to 300 ℃, directly be added to 600-670 ℃, be incubated 5-6 hour, heat 900-950 ℃ again, be incubated 2-3 hour, air cooling or stove are cold;
B, forging step
1), to select diameter be 32 mm round steel, utilizes cutter to carry out blanking, blank length is 80mm after shearing;
2), the blank of step 1) is put into intermediate-frequency heating furnace heating, heating-up temperature 1120-1180 ℃, keep 2.8-4.2min heat time heating time;
3), with step 2) obtain workpiece, utilize pneumatic hammer that the middle part of above-mentioned workpiece is pulled out, pull out the hammer number of times be 8-14 time;
4), the workpiece after will pulling out is put into punch press and is carried out integral body and flatten;
5), the workpiece after will flattening puts on the mould of electric screw press, utilizes mould forge hot workpiece; 900 ℃ of temperature, pressure 400T;
6), with the workpiece after the forge hot, put into the punch press processing of cutting edge;
C, heat treatment step
(1), normalizing, will be heated under 865-875 ℃ through the workpiece after cut edge processing, be incubated about 1 hour;
(2), quench: be warming up to 675-685 ℃ of lower insulation about 30 minutes through the workpiece after the normalizing, continue to be warming up to 905-915 ℃ of insulation about 2 hours;
(3) tempering: be warmed up to 570-620 ℃ through the workpiece after quenching, lower insulation is about 5 hours;
D, with the workpiece Shot Blasting after the heat treatment;
E, the workpiece behind the ball blast is carried out cold school process;
F, the piece packaging that cold school is processed.
The described blank of step 1) that will forge in the step is put into the intermediate-frequency heating furnace heating, and 1150 ℃ of heating-up temperatures keep 4.0min heat time heating time.
Among the described step a, before the cylinder blank behind the moulding by casting is not cooled to 300 ℃, directly be added to 640 ℃, be incubated 5.5 hours, heat 930 ℃ again, be incubated 2.5 hours, air cooling or stove are cold.
Compared with prior art, the inventive method is by heat treatment before forging, forge twice operation of after-baking, tensile strength sigma b (MPa): 〉=780 (110), yield strength σ s (MPa): 〉=630 (95), percentage elongation δ 5 (%): 〉=14, contraction percentage of area ψ (%): 〉=35, make blank obtain rational distribution, thereby reduced the size of overlap, so that stock utilization has brought up to 70% from original about 30%, improved 40%, because blank reduces, the equipment hitting power also reduces accordingly, and the life-span that causes mould is brought up to 9000 from original 5000, improves nearly about one times.After the blank reasonable distribution, because the minimizing of overlap, metal reflow causes the phenomenons such as the sufficient and part of folder dirt and forging part is inabundant to improve.
The specific embodiment
A kind of processing method of shift fork may further comprise the steps:
A, cast cylinder blank step
Chemical component weight percentage is in the cylinder blank: C 0.18-0.27%, Mn 1.1-2.0%, Si 0.6-1.2%, V 0.08-0.15%, Ti 0.11-0.2%, Cr 0.8-2.0%, Ni 0.5-1.5%, Mo 0.15～0.40%, W 0.1-0.8%, Nb 0.05-0.07%, Al 0.15～0.23%, Cu 0.15～0.50%, P≤0.030%, S≤0.030%, and surplus is Fe and inevitably is mingled with matter; Before cylinder blank behind the moulding by casting is not cooled to 300 ℃, directly be added to 640 ℃, be incubated 5.5 hours, heat 930 ℃ again, be incubated 2.5 hours, air cooling or stove are cold;
B, forging step
1), to select diameter be 32 mm round steel, utilizes cutter to carry out blanking, blank length is 80mm after shearing;
2), the blank of step 1 is put into the intermediate-frequency heating furnace heating, 1150 ℃ of heating-up temperatures, maintenance 4.0min heat time heating time;
3), with step 2) obtain workpiece, utilize pneumatic hammer that the middle part of above-mentioned workpiece is pulled out, pull out the hammer number of times be 8-14 time;
4), the workpiece after will pulling out is put into punch press and is carried out integral body and flatten;
5), the workpiece after will flattening puts on the mould of electric screw press, utilizes mould forge hot workpiece; 900 ℃ of temperature, pressure 400T;
6), with the workpiece after the forge hot, put into the punch press processing of cutting edge;
C, heat treatment step
(1), normalizing, will be heated under 865-875 ℃ through the workpiece after cut edge processing, be incubated about 1 hour;
(2), quench: be warming up to 675-685 ℃ of lower insulation about 30 minutes through the workpiece after the normalizing, continue to be warming up to 905-915 ℃ of insulation about 2 hours;
(3) tempering: be warmed up to 570-620 ℃ through the workpiece after quenching, lower insulation is about 5 hours;
D, with the workpiece Shot Blasting after the heat treatment;
E, the workpiece behind the ball blast is carried out cold school process;
F, the piece packaging that cold school is processed.
Claims (3)
1. the processing method of a shift fork is characterized in that, may further comprise the steps:
A, cast cylinder blank step
Chemical component weight percentage is in the cylinder blank: C 0.18-0.27%, Mn 1.1-2.0%, Si 0.6-1.2%, V 0.08-0.15%, Ti 0.11-0.2%, Cr 0.8-2.0%, Ni 0.5-1.5%, Mo 0.15～0.40%, W 0.1-0.8%, Nb 0.05-0.07%, Al 0.15～0.23%, Cu 0.15～0.50%, P≤0.030%, S≤0.030%, and surplus is Fe and inevitably is mingled with matter; Before cylinder blank behind the moulding by casting is not cooled to 300 ℃, directly be added to 600-670 ℃, be incubated 5-6 hour, heat 900-950 ℃ again, be incubated 2-3 hour, air cooling or stove are cold;
B, forging step
1), to select diameter be 32 mm round steel, utilizes cutter to carry out blanking, blank length is 80mm after shearing;
2), the blank of step 1 is put into intermediate-frequency heating furnace heating, heating-up temperature 1120-1180 ℃, keep 2.8-4.2min heat time heating time;
3), with step 2) obtain workpiece, utilize pneumatic hammer that the middle part of above-mentioned workpiece is pulled out, pull out the hammer number of times be 8-14 time;
4), the workpiece after will pulling out is put into punch press and is carried out integral body and flatten;
5), the workpiece after will flattening puts on the mould of electric screw press, utilizes mould forge hot workpiece; 900 ℃ of temperature, pressure 400T;
6), with the workpiece after the forge hot, put into the punch press processing of cutting edge;
C, heat treatment step
(1), normalizing, will be heated under 865-875 ℃ through the workpiece after cut edge processing, be incubated about 1 hour;
(2), quench: be warming up to 675-685 ℃ of lower insulation about 30 minutes through the workpiece after the normalizing, continue to be warming up to 905-915 ℃ of insulation about 2 hours;
(3) tempering: be warmed up to 570-620 ℃ through the workpiece after quenching, lower insulation is about 5 hours;
D, with the workpiece Shot Blasting after the heat treatment;
E, the workpiece behind the ball blast is carried out cold school process;
F, the piece packaging that cold school is processed.
2. the processing method of described shift fork according to claim 1 is characterized in that: the described blank of step 1) that will forge in the step is put into the intermediate-frequency heating furnace heating, and 1150 ℃ of heating-up temperatures keep 4.0min heat time heating time.
3. the processing method of described shift fork according to claim 1 is characterized in that: among the described step a, before the cylinder blank behind the moulding by casting is not cooled to 300 ℃, directly be added to 640 ℃, be incubated 5.5 hours, heat again 930 ℃, be incubated 2.5 hours, air cooling or stove are cold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210299538.8A CN102974742B (en) | 2012-08-22 | 2012-08-22 | Processing method of movable fork |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210299538.8A CN102974742B (en) | 2012-08-22 | 2012-08-22 | Processing method of movable fork |
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| Publication Number | Publication Date |
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| CN102974742A true CN102974742A (en) | 2013-03-20 |
| CN102974742B CN102974742B (en) | 2015-01-21 |
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| CN201210299538.8A Active CN102974742B (en) | 2012-08-22 | 2012-08-22 | Processing method of movable fork |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846627A (en) * | 2014-02-11 | 2014-06-11 | 马鞍山市恒毅机械制造有限公司 | Manufacturing method for sliding fork for automobile |
| CN104099515A (en) * | 2014-05-15 | 2014-10-15 | 天津市东达伟业机车车辆有限公司 | Steel, formed heat treatment steel and production method thereof |
| CN104148575A (en) * | 2014-07-24 | 2014-11-19 | 浙江昌利锻造有限公司 | Process for forging shifting forks |
| CN104152805A (en) * | 2014-07-25 | 2014-11-19 | 安徽霍山科皖特种铸造有限责任公司 | Alloy steel and thermal treatment method thereof |
| CN105855799A (en) * | 2016-04-21 | 2016-08-17 | 昌利锻造有限公司 | Machining method of axial joint fork |
| CN105855440A (en) * | 2016-04-21 | 2016-08-17 | 昌利锻造有限公司 | Machining method of shifting fork |
| CN107891111A (en) * | 2017-11-14 | 2018-04-10 | 天津职业技术师范大学 | The preparation method and trident support of a kind of trident support |
| CN110423958A (en) * | 2019-07-11 | 2019-11-08 | 湖北文理学院 | A kind of spindle and its processing technology |
| CN111843404A (en) * | 2020-07-15 | 2020-10-30 | 浙江跃进锻造有限公司 | Manufacturing process of automotive steering tie rod arm |
| CN111843403A (en) * | 2020-07-15 | 2020-10-30 | 浙江跃进锻造有限公司 | Manufacturing process of automobile steering knuckle arm |
Citations (7)
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|---|---|---|---|---|
| GB1474876A (en) * | 1974-02-18 | 1977-05-25 | Peugeot | Forging of metal components |
| US4094183A (en) * | 1975-12-19 | 1978-06-13 | Press- & Stanzwerk Ag | Method of fabricating a substantially U-shaped body and apparatus for the performance thereof |
| JPS59121414A (en) * | 1982-12-27 | 1984-07-13 | Toyota Motor Corp | Shift fork |
| CN1500019A (en) * | 2001-03-29 | 2004-05-26 | 昭和电工株式会社 | Closed forging method, forging prodn. system using method, forging die used in method and system, and preform or yoke produced by method and system |
| CN101007378A (en) * | 2007-02-01 | 2007-08-01 | 上海保捷汽车零部件锻压有限公司 | Shifting fork forging method of auto parts |
| CN101670417A (en) * | 2009-09-29 | 2010-03-17 | 重庆凯恩机械制造有限公司 | Steering knuckle forging molding process of heavy truck |
| CN102513488A (en) * | 2011-12-27 | 2012-06-27 | 十堰园钧工贸有限公司 | Precise forging molding method for blank of automobile fork-shaped half shaft |
-
2012
- 2012-08-22 CN CN201210299538.8A patent/CN102974742B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1474876A (en) * | 1974-02-18 | 1977-05-25 | Peugeot | Forging of metal components |
| US4094183A (en) * | 1975-12-19 | 1978-06-13 | Press- & Stanzwerk Ag | Method of fabricating a substantially U-shaped body and apparatus for the performance thereof |
| JPS59121414A (en) * | 1982-12-27 | 1984-07-13 | Toyota Motor Corp | Shift fork |
| CN1500019A (en) * | 2001-03-29 | 2004-05-26 | 昭和电工株式会社 | Closed forging method, forging prodn. system using method, forging die used in method and system, and preform or yoke produced by method and system |
| CN101007378A (en) * | 2007-02-01 | 2007-08-01 | 上海保捷汽车零部件锻压有限公司 | Shifting fork forging method of auto parts |
| CN101670417A (en) * | 2009-09-29 | 2010-03-17 | 重庆凯恩机械制造有限公司 | Steering knuckle forging molding process of heavy truck |
| CN102513488A (en) * | 2011-12-27 | 2012-06-27 | 十堰园钧工贸有限公司 | Precise forging molding method for blank of automobile fork-shaped half shaft |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846627A (en) * | 2014-02-11 | 2014-06-11 | 马鞍山市恒毅机械制造有限公司 | Manufacturing method for sliding fork for automobile |
| CN104099515A (en) * | 2014-05-15 | 2014-10-15 | 天津市东达伟业机车车辆有限公司 | Steel, formed heat treatment steel and production method thereof |
| CN104148575A (en) * | 2014-07-24 | 2014-11-19 | 浙江昌利锻造有限公司 | Process for forging shifting forks |
| CN104152805A (en) * | 2014-07-25 | 2014-11-19 | 安徽霍山科皖特种铸造有限责任公司 | Alloy steel and thermal treatment method thereof |
| CN105855799A (en) * | 2016-04-21 | 2016-08-17 | 昌利锻造有限公司 | Machining method of axial joint fork |
| CN105855440A (en) * | 2016-04-21 | 2016-08-17 | 昌利锻造有限公司 | Machining method of shifting fork |
| CN107891111A (en) * | 2017-11-14 | 2018-04-10 | 天津职业技术师范大学 | The preparation method and trident support of a kind of trident support |
| CN107891111B (en) * | 2017-11-14 | 2019-10-11 | 天津职业技术师范大学 | A kind of preparation method and trident bracket of trident bracket |
| CN110423958A (en) * | 2019-07-11 | 2019-11-08 | 湖北文理学院 | A kind of spindle and its processing technology |
| CN111843404A (en) * | 2020-07-15 | 2020-10-30 | 浙江跃进锻造有限公司 | Manufacturing process of automotive steering tie rod arm |
| CN111843403A (en) * | 2020-07-15 | 2020-10-30 | 浙江跃进锻造有限公司 | Manufacturing process of automobile steering knuckle arm |
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| CN102974742B (en) | 2015-01-21 |
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