CN107282849B - Forging process for left half shaft of automobile differential - Google Patents
Forging process for left half shaft of automobile differential Download PDFInfo
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- CN107282849B CN107282849B CN201710570626.XA CN201710570626A CN107282849B CN 107282849 B CN107282849 B CN 107282849B CN 201710570626 A CN201710570626 A CN 201710570626A CN 107282849 B CN107282849 B CN 107282849B
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- forging
- drawing die
- blank
- heating
- size
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- 238000005242 forging Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 238000009966 trimming Methods 0.000 claims abstract description 25
- 238000005422 blasting Methods 0.000 claims abstract description 13
- 238000005496 tempering Methods 0.000 claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000007547 defect Effects 0.000 abstract description 4
- 238000009740 moulding (composite fabrication) Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 12
- 238000007664 blowing Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Retarders (AREA)
Abstract
The invention provides a forging process for a left half shaft of an automobile differential, and relates to the technical field of forging; the method comprises the steps of blanking, heating, forming, trimming, tempering and shot blasting, wherein a free forging drawing die cavity is designed, the drawing die cavity is ensured to be matched with a finish forging die cavity, a positioning device is designed and installed on a drawing die, the drawing die cavity is ensured to be matched with the finish forging die cavity, the situation that the size of a forging blank after finish forging does not meet the drawing requirement due to the fact that the diameter of the forging blank is larger or smaller is prevented, the positioning device is designed on the drawing die, the axial size and the radial size of the blank are controlled, the product accuracy is greatly improved, various forging defects caused by the length of the forging blank or the length of the forging blank are overcome, effective controllability is brought to the production process, and the shift yield is improved.
Description
Technical Field
The invention relates to the technical field of forging, in particular to a forging process for a left half shaft of an automobile differential.
Background
The left half shaft and the right half shaft are a group of important shaft parts in the automobile differential, the forging blank diameter of the product is smaller, the existing forging scheme is to adopt a turning process to manufacture a blank, a bar phi 35 is turned into a phi 32 blank, and then a friction press is used for forging and forming, the method is higher in cost, the goods output per shift is lower, the production period is long, the product precision is not high, and the customer satisfaction is influenced.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a forging process of a left half shaft of an automobile differential, which is simple in processing process, saves cost and can improve production efficiency.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
a forging process for a left half shaft of an automobile differential comprises the following steps:
(1) blanking: adopting a circular saw to perform blanking, wherein the blanking weight error is controlled to be +/-3 g;
(2) heating: heating the blank to 1100-;
(3) forming: designing a free forging drawing die cavity to ensure that the drawing die cavity is matched with a finish forging die cavity, and designing a positioning device to be installed on the drawing die;
the drawing die is matched with the product in size, the size of a cavity at the tail end of the drawing die is the same as that of a cavity of a finish forging die, the size of a drawn forged piece is not easy to deform, a positioning device is arranged in the middle of the drawing die, the axial and radial sizes of a blank are controlled, and when the forged piece is drawn to a set size, drawing can be stopped;
(4) trimming: cutting off redundant flash by a press;
(5) tempering: heating the formed piece to 1050-;
(6) shot blasting: and taking out the surface oxide skin and other impurities by using a shot blasting machine.
Preferably, step (3) uses a 600T friction press, and the positioning device positions the radial dimension and the axial dimension of the blank simultaneously.
Preferably, the step (4) adopts a trimming die of an open single-point press to perform trimming, and the trimmed waste is pneumatically blown away from the formed piece at the same time of trimming.
Preferably, the heating rate of the heating process in the step (5) is 2 ℃/min.
(III) advantageous effects
The invention provides a forging process for a left half shaft of an automobile differential, which has the beneficial effects that:
(1) the improved blank making process is adopted, and the turning blank making is changed into the free forging and drawing blank making, so that the blanking weight is reduced, 75 g of materials are saved for each product, the production yield in each class is greatly improved, and the production period is shortened;
(2) the die cavity of the drawing die is ensured to be matched with the die cavity of the finish forging die, so that the situation that the size of the forged blank after finish forging does not meet the requirement of a drawing due to the fact that the diameter of the manufactured blank is larger or smaller is prevented, and the precision of a product is improved;
(3) a positioning device is designed on the drawing die to control the axial and radial sizes of blanks, so that the product size accuracy is greatly improved, the forging defects caused by the fact that the blanks are long or short are overcome, and effective controllability is brought to the production process.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
a forging process for a left half shaft of an automobile differential comprises the following steps:
(1) blanking: adopting a circular saw to perform blanking, wherein the blanking weight error is controlled to be +/-3 g;
(2) heating: heating the blank to 1100 ℃, and preserving heat for 3 h;
(3) forming: designing a free forging drawing die cavity to ensure that the drawing die cavity is matched with a finish forging die cavity, and designing a positioning device to be installed on the drawing die;
(4) trimming: cutting off redundant flash by a press;
(5) tempering: heating the formed piece to 1100 ℃, preserving heat for 4h, quickly putting the formed piece into cold water, cooling to 220 ℃, then raising the temperature to 720 ℃, preserving heat for 6h, cooling to room temperature in a furnace, standing for 2 days, raising the temperature to 750 ℃ again, preserving heat for 12h, and cooling to room temperature in air;
(6) shot blasting: and taking out the surface oxide skin and other impurities by using a shot blasting machine.
And (4) adopting a 600T friction press in the step (3), and simultaneously positioning the radial dimension and the axial dimension of the blank by using a positioning device.
And (4) trimming by using a trimming die of the open single-point press, and blowing the trimmed waste away from the formed piece in a pneumatic mode while trimming.
And (3) the heating rate in the heating process in the step (5) is 2 ℃/min.
Example 2:
a forging process for a left half shaft of an automobile differential comprises the following steps:
(1) blanking: adopting a circular saw to perform blanking, wherein the blanking weight error is controlled to be +/-3 g;
(2) heating: heating the blank to 1120 ℃, and preserving heat for 4 hours;
(3) forming: designing a free forging drawing die cavity to ensure that the drawing die cavity is matched with a finish forging die cavity, and designing a positioning device to be installed on the drawing die;
(4) trimming: cutting off redundant flash by a press;
(5) tempering: heating the formed piece to 1050 ℃, preserving heat for 3h, quickly putting the formed piece into cold water, cooling to 200 ℃, increasing the temperature to 750 ℃, preserving heat for 7h, cooling to room temperature in a furnace, standing for 1 day, increasing the temperature to 800 ℃ again, preserving heat for 9h, and cooling to room temperature in air;
(6) shot blasting: and taking out the surface oxide skin and other impurities by using a shot blasting machine.
And (4) adopting a 600T friction press in the step (3), and simultaneously positioning the radial dimension and the axial dimension of the blank by using a positioning device.
And (4) trimming by using a trimming die of the open single-point press, and blowing the trimmed waste away from the formed piece in a pneumatic mode while trimming.
And (3) the heating rate in the heating process in the step (5) is 2 ℃/min.
Example 3:
a forging process for a left half shaft of an automobile differential comprises the following steps:
(1) blanking: adopting a circular saw to perform blanking, wherein the blanking weight error is controlled to be +/-3 g;
(2) heating: heating the blank to 1130 ℃, and preserving heat for 3 hours;
(3) forming: designing a free forging drawing die cavity to ensure that the drawing die cavity is matched with a finish forging die cavity, and designing a positioning device to be installed on the drawing die;
(4) trimming: cutting off redundant flash by a press;
(5) tempering: heating the formed piece to 1150 ℃, preserving heat for 4h, quickly putting the formed piece into cold water, cooling to 300 ℃, then raising the temperature to 600 ℃, preserving heat for 8h, cooling to room temperature in a furnace, standing for 2 days, raising the temperature to 760 ℃ again, preserving heat for 10h, and cooling to room temperature in air;
(6) shot blasting: and taking out the surface oxide skin and other impurities by using a shot blasting machine.
And (4) adopting a 600T friction press in the step (3), and simultaneously positioning the radial dimension and the axial dimension of the blank by using a positioning device.
And (4) trimming by using a trimming die of the open single-point press, and blowing the trimmed waste away from the formed piece in a pneumatic mode while trimming.
And (3) the heating rate in the heating process in the step (5) is 2 ℃/min.
Example 4:
a forging process for a left half shaft of an automobile differential comprises the following steps:
(1) blanking: adopting a circular saw to perform blanking, wherein the blanking weight error is controlled to be +/-3 g;
(2) heating: heating the blank to 1150 ℃, and preserving heat for 2 h;
(3) forming: designing a free forging drawing die cavity to ensure that the drawing die cavity is matched with a finish forging die cavity, and designing a positioning device to be installed on the drawing die;
(4) trimming: cutting off redundant flash by a press;
(5) tempering: heating the formed piece to 1200 ℃, preserving heat for 3h, quickly putting the formed piece into cold water, cooling to 260 ℃, then raising the temperature to 660 ℃, preserving heat for 7h, cooling to room temperature in a furnace, standing for 1 day, raising the temperature to 780 ℃ again, preserving heat for 8h, and cooling to room temperature in air;
(6) shot blasting: and taking out the surface oxide skin and other impurities by using a shot blasting machine.
And (4) adopting a 600T friction press in the step (3), and simultaneously positioning the radial dimension and the axial dimension of the blank by using a positioning device.
And (4) trimming by using a trimming die of the open single-point press, and blowing the trimmed waste away from the formed piece in a pneumatic mode while trimming.
And (3) the heating rate in the heating process in the step (5) is 2 ℃/min.
The forged product manufactured by the above embodiments is detected, and if the raw material is saved by 0 g for each forged product in the original process, the results are as follows:
as can be seen from the above table, the improved blank making process is adopted, the turning blank making is changed into the free forging and drawing blank making, about 75 g of materials are saved for each product, and the shift yield is greatly improved; the die cavity of the drawing die is ensured to be matched with the die cavity of the finish forging die, so that the product precision is increased; a positioning device is designed on the drawing die to control the axial and radial sizes of blanks, so that the product size accuracy is greatly improved, the forging defects caused by the fact that the blanks are long or short are overcome, and effective controllability is brought to the production process.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (1)
1. A forging process for a left half shaft of an automobile differential is characterized by comprising the following steps:
(1) blanking: adopting a circular saw to perform blanking, wherein the blanking weight error is controlled to be +/-3 g;
(2) heating: heating the blank to 1100-;
(3) forming: designing a free forging drawing die cavity to ensure that the drawing die cavity is matched with a finish forging die cavity, and designing a positioning device to be installed on the drawing die;
(4) trimming: cutting off redundant flash by a press;
(5) tempering: heating the formed piece to 1050-;
(6) shot blasting: taking out surface oxide skin and other impurities by using a shot blasting machine;
a 600T friction press is adopted in the step (3), and the radial size and the axial size of the blank are simultaneously positioned by a positioning device;
the step (4) adopts a trimming die of the open single-point press to perform trimming, and adopts a pneumatic mode to blow the trimmed waste away from a forming piece while trimming;
the heating rate in the heating process in the step (5) is 2 ℃/min;
the drawing die is matched with the product in size, the size of a cavity at the tail end of the drawing die is the same as that of a cavity of a finish forging die, the size of a drawn forged piece is not prone to deformation, a positioning device is arranged in the middle of the drawing die, the axial and radial sizes of a blank are controlled, and when the forged piece is drawn to a set size, drawing can be stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710570626.XA CN107282849B (en) | 2017-07-13 | 2017-07-13 | Forging process for left half shaft of automobile differential |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710570626.XA CN107282849B (en) | 2017-07-13 | 2017-07-13 | Forging process for left half shaft of automobile differential |
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| Publication Number | Publication Date |
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| CN107282849A CN107282849A (en) | 2017-10-24 |
| CN107282849B true CN107282849B (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710570626.XA Active CN107282849B (en) | 2017-07-13 | 2017-07-13 | Forging process for left half shaft of automobile differential |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108131440A (en) * | 2017-12-17 | 2018-06-08 | 江苏威鹰机械有限公司 | Vehicle automatic transmission differential mechanism right axle shaft and its manufacturing process |
| CN109604510A (en) * | 2018-11-29 | 2019-04-12 | 攀枝花市科发机械制造有限公司 | A kind of truck semiaxis forging technology |
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| CN101947633A (en) * | 2010-09-11 | 2011-01-19 | 无锡透平叶片有限公司 | Die forging process and special die for final stage blade of large half-RPM (Revolution per Minute) nuclear turbine |
| CN102909298B (en) * | 2012-10-22 | 2014-12-10 | 沈阳黎明航空发动机(集团)有限责任公司 | Forming method of forge piece with large torsional flange and spacer flange as well as forming mold |
| CN104308057B (en) * | 2014-11-03 | 2016-04-27 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of long thin plate class complex die forging loose tooling forging base manufacturing process |
| CN105057983A (en) * | 2015-08-03 | 2015-11-18 | 天长市众鑫精密锻造科技有限公司 | Forging process of left half axle and right half axle for automobile |
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| CN107282849A (en) | 2017-10-24 |
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Application publication date: 20171024 Assignee: Tianchang Xingyu Traffic Equipment Technology Co.,Ltd. Assignor: ANHUI ZHONGXIN S&T CO.,LTD. Contract record no.: X2024980005928 Denomination of invention: A forging process for the left half shaft of an automotive differential Granted publication date: 20200825 License type: Common License Record date: 20240522 |