CN114309411A - Crank prefabricated part forging process - Google Patents
Crank prefabricated part forging process Download PDFInfo
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- CN114309411A CN114309411A CN202210065615.7A CN202210065615A CN114309411A CN 114309411 A CN114309411 A CN 114309411A CN 202210065615 A CN202210065615 A CN 202210065615A CN 114309411 A CN114309411 A CN 114309411A
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- 238000005242 forging Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
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Abstract
The invention relates to a crank prefabricated member forging process, which comprises the steps of placing a large flat anvil, a small flat anvil and a double-edge grooving die on a transverse workbench, moving the anvil die through the transverse workbench, automatically replacing the anvil die, setting the crank prefabricated member to be a double-fin body with a boss, setting the length of the double-fin body to be L, the width of the double-fin body to be b and the height of the double-fin body to be h, and setting the height of the boss to be h2B, forging step by step, firstly drawing out the blank, upsetting the blank, then drawing out the blank to a b 3/4 xb 3/4 rectangular blank with the section, upsetting the rectangular blank to half of the original length, then drawing out the blank to a b xb rectangular blank with the section, pressing a groove and a forging boss on the blank, and forging to the set valueShape and size. And a multi-time upsetting-drawing process is adopted, so that the forging ratio is increased, the internal quality of the forging is improved, the forging is gradually and transitionally formed, and the crank prefabricated member is forged by one fire. The purposes of simplest forging step, minimum material loss and minimum production cost are achieved, and the forging is completed by one fire.
Description
Technical Field
The invention relates to a combined crank throw forged piece prefabricated piece, in particular to a forging process of a large combined crank throw prefabricated piece, and belongs to the technical field of forging.
Background
The crank shaft is a main part in mechanical transmission, the crank throw is an important part on the crank shaft, and the crank throw of the large-scale crank shaft is complex due to large stress because the crank shaft bears the conversion of mechanical rotation motion and reciprocating motion, so that the crank throw has enough rigidity and strength and the capability of bearing impact load. In order to meet the performance requirements, a forged crank throw is usually selected, the production process of the forged crank throw is complex, and the operation can be completed by multiple steps, multiple fire times and repeated replacement of multiple anvil dies. The traditional method for forging the crank throw has die forging and free forging, and has certain defects, so that the production cost is high, the production efficiency is low, a forging machine with the weight of more than ten thousand tons and a die with high manufacturing price are required, the yield of the forged piece is low, and the forged piece is frequently damaged and folded. Therefore, there is a need for scientific design improvements to the forging process.
Disclosure of Invention
The invention provides a forging process of a crank throw prefabricated part, which is characterized in that the shape and parameters of the crank throw prefabricated part are set, an anvil die capable of being automatically replaced is arranged, and forging is completed by one fire by adopting a repeated upsetting-drawing forging process.
The technical scheme of the invention is as follows: the forging equipment comprises a forging machine, an anvil die and operating equipment, wherein the anvil die comprises an upper anvil, a lower anvil and an upsetting plate, and the lower anvil comprises a small flat anvil, a large flat anvil and a double-edge groove pressing die; the operating equipment comprises a workbench and a manipulator, wherein the workbench comprises a transverse workbench and a longitudinal workbench; the upper anvil is connected to the forging machine, the large flat anvil, the small flat anvil and the double-edge groove pressing die are arranged on the transverse workbench and move along with the transverse workbench, and the manipulator clamps the upsetting plate and the forging; the prefabricated part consists of a boss and a double-fin body, the boss is arranged in the middle of the double-fin body and connected with the double-fin body, the length of the prefabricated part is set to be L, the width of the prefabricated part is set to be b, and the height of the prefabricated part is set to be h, and the length of the double-fin body is set to be L, the width of the prefabricated part is set to be b, and the height of the double-fin body is set to be h1(ii) a The height of the boss is h2Wide and wideIs b; then the total height h = h of the double wing body1+ h2The method is characterized in that:
the forging process comprises the following steps:
7, placing the middle part of the forge piece in the step 6 above the double-edge groove pressing die, and forging parallel left and right grooves below the forge piece;
8, turning the forging with the left and right grooves in the step 7 by 180 degrees in the vertical direction, placing the forging on a large flat anvil for forging, and correspondingly forging the left side of the left groove and the right side of the right groove into a forging with the width of b and the height of h1A double-fin body with L length, and a forged height h between the left and right grooves2And b, preparing the crank throw prefabricated part.
Further, the manipulator is provided with a left manipulator and a right manipulator.
Preferably, the steel blank in step 2 is drawn to 1.2 to 1.7 times the original length.
Preferably, the forging in step 3 is upset to the original length (1/2 ± 20%).
Preferably, the forging in the step 4 is pulled out to a forging with a section of 3 b/4 (1 +/-5%). times.3 b/4 (1 +/-5%).
Preferably, the forging in step 5 is upset to (1/2 ± 10%) of the original length.
Preferably, the forging in the step 6 is drawn to a forging with a section of b (1 + 0-5%) × b (1 + 0-5%).
The invention adopts the multiple upsetting-drawing process, increases the forging ratio, improves the internal quality of the forge piece, gradually and transitionally forms the forge piece, and finishes the forging of the crank throw prefab by one fire. The purposes of simplest forging process step, minimum material loss and minimum production cost are achieved.
Drawings
FIG. 1 is a schematic view of the initial state of step 2,
figure 2 is a schematic diagram of the end state of step 2,
figure 3 is a schematic view of the initial state of step 3,
figure 4 is a schematic diagram of the end state of step 3,
figure 5 is a schematic view of the initial state of step 4,
figure 6 is a schematic diagram of the end state of step 4,
figure 7 is a schematic view of the initial state of step 5,
figure 8 is a schematic diagram of the end of step 5,
figure 9 is a schematic view of the initial state of step 6,
figure 10 is a schematic diagram of the end of step 6,
figure 11 is a schematic view of the process step 7,
figure 12 is a schematic view of the initial state of step 8,
figure 13 is a schematic diagram of the end of step 8,
figure 14 is a front view of the preform,
FIG. 15 is a top view of the preform.
In the attached drawing, 1 is an upper anvil, 2 is a left manipulator, 2' is a right manipulator, 3 is a lower anvil, 4 is a steel billet, 5 is a blank drawn out through the process step 2, 6 is an upsetting plate, 7 is a blank upset through the process step 3, 8 is a blank drawn out through the process step 4, 9 is a blank upset through the process step 5, 10 is a blank drawn out through the process step 6, 11 is a double-edge groove die, 12 is a large flat anvil, and 13 is a prefabricated part.
Detailed Description
In this example, 16 tons of steel blank is placed in a heating furnace and heated to the forging temperature.
As shown in fig. 1 and 2, a manipulator 2 clamps a heated high-temperature steel billet 4 and places the heated high-temperature steel billet between an upper anvil 1 and a small flat anvil 3, and forges and presses the high-temperature steel billet into a blank 5, wherein the length and the cross section of the blank meet the length-diameter ratio requirement.
As shown in fig. 3 and 4, the blank 5 stands on a longitudinal table in the length direction, and the manipulator 2' clamps the upsetting plate 6 between the blank 5 and the upper anvil 1 to upset the blank 5 to 1/2 of blank 7 in the original length.
As shown in fig. 5 and 6, the blank member 7 is drawn through the upper anvil 1 and the small flat anvil 3 to a blank member 8 having a cross section of 900 mm × 900 mm long by 2500 mm.
As shown in fig. 7 and 8, the manipulator 2 holds the blank 8 and stands on the workbench, and the manipulator' holds the upsetting plate 6 and places the blank 8 between the upper anvil 1 and the blank 9 which is upset to 1250 mm long.
As shown in fig. 9 and 10, the blank 9 is drawn through the upper anvil 1 and the small flat anvil 3 to a blank 10 having a cross section of 1200 mm × 1200 mm by 1400 mm.
As shown in fig. 11, the lower anvil is replaced with a double-edged groove die 11, and parallel left and right grooves are forged below the blank 11.
As shown in fig. 12 and 13, the blank 10 of the left and right grooves is turned over by 180 ° in the vertical direction, and the left side of the left groove and the right side of the right groove are correspondingly forged to have a width of b mm and a height of h1The double-fin body with the length of L mm and the height of h2And (5) the boss with the mm and the width of b mm is formed, so that the crank prefabricated member is manufactured.
Claims (7)
1. The forging equipment comprises a forging machine, an anvil die and operating equipment, wherein the anvil die comprises an upper anvil, a lower anvil and an upsetting plate, and the lower anvil comprises a small flat anvil, a large flat anvil and a double-edge groove pressing die; the operating equipment comprises a workbench and a manipulator, wherein the workbench comprises a transverse workbench and a longitudinal workbench; the upper anvil is connected to the forging machine, the large flat anvil, the small flat anvil and the double-edge groove pressing die are arranged on the transverse workbench and move along with the transverse workbench, and the manipulator clamps the upsetting plate and the forging; the prefabricated part consists of a boss and a double-fin body, the boss is arranged in the middle of the double-fin body and connected with the double-fin body, the length of the prefabricated part is set to be L, the width of the prefabricated part is set to be b, and the height of the prefabricated part is set to be h, and the length of the double-fin body is set to be L, the width of the prefabricated part is set to be b, and the height of the double-fin body is set to be h1(ii) a The height of the boss is h2B is wide; then the total height h = h of the double wing body1+ h2，
The forging process comprises the following steps:
step one, selecting a steel billet according to the weight requirement of a crank forging piece, and heating to a set forging temperature;
step two, placing the billet heated in the step one between an upper anvil and a small flat anvil, and drawing the billet;
step three, the length direction of the forge piece drawn out in the step two is erected on a longitudinal workbench, and an upsetting plate is clamped between the blank and an upper anvil by a manipulator and is upset to 1/2 of the original length;
step four, pulling the upset blank in step three to a forging with the section of (3 b/4) x (3 b/4);
fifthly, the length direction of the forged piece pulled out in the fourth step is erected on a longitudinal workbench and is upset to 1/2 of the original length;
sixthly, drawing the upsetting forged piece in the fifth step to a forged piece with a b x b section;
seventhly, placing the middle part of the forged piece in the sixth step above the double-edge groove pressing die, and forging parallel left and right grooves below the forged piece;
step eight, turning the forging with the left and right grooves in the step seven by 180 degrees in the vertical direction, placing the forging on a large flat anvil for forging, and correspondingly forging the left side of the left groove and the right side of the right groove into a forging with the width of b and the height of h1A double-fin body with L length, and a forged height h between the left and right grooves2And b, preparing the crank throw prefabricated part.
2. The crank throw preform forging process according to claim 1, characterized in that: the manipulator is provided with a left manipulator and a right manipulator.
3. The crank throw preform forging process according to claim 1, characterized in that: and in the second step, the steel blank is drawn to 1.2 to 1.7 times of the original length.
4. The crank throw preform forging process according to claim 1, characterized in that: and in the third step, the forging piece is upset to the original length (1/2 +/-20%).
5. The crank throw preform forging process according to claim 1, characterized in that: and in the fourth step, the forged piece is pulled out to a forged piece with the cross section of 3 b/4 (1 +/-5%) multiplied by 3 b/4 (1 +/-5%).
6. The crank throw preform forging process according to claim 1, characterized in that: and fifthly, upsetting the forged piece to the original length (1/2 +/-10%).
7. The crank throw preform forging process according to claim 1, characterized in that: in the sixth step, the forging is drawn to a forging with a section of b (1 + 0-5%) × b (1 + 0-5%).
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210065615.7A CN114309411A (en) | 2022-01-20 | 2022-01-20 | Crank prefabricated part forging process |
| EP22921459.8A EP4420808A1 (en) | 2022-01-20 | 2022-08-02 | Two-fire forming forging process for large crank throw |
| PCT/CN2022/109747 WO2023138030A1 (en) | 2022-01-20 | 2022-08-02 | Two-fire forming forging process for large crank throw |
| KR1020247014751A KR20240089283A (en) | 2022-01-20 | 2022-08-02 | Two-step heat forming forging process for large crank slowdowns |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210065615.7A CN114309411A (en) | 2022-01-20 | 2022-01-20 | Crank prefabricated part forging process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114309411A true CN114309411A (en) | 2022-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210065615.7A Withdrawn CN114309411A (en) | 2022-01-20 | 2022-01-20 | Crank prefabricated part forging process |
Country Status (1)
| Country | Link |
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| CN (1) | CN114309411A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023138030A1 (en) * | 2022-01-20 | 2023-07-27 | 中聚信海洋工程装备有限公司 | Two-fire forming forging process for large crank throw |
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|---|---|---|---|---|
| US5039355A (en) * | 1989-03-22 | 1991-08-13 | Daumas Marie T | Process for obtaining parts made of copper of very fine texture from a billet made by continuous casting |
| WO2008106858A1 (en) * | 2007-03-05 | 2008-09-12 | Guizhou Anda Aviation Forging Co., Ltd. | A quasi-isothermal forging method of a disk shaped forging of nickel-base superalloys in air |
| CN102319849A (en) * | 2011-07-06 | 2012-01-18 | 中国第一重型机械股份公司 | The forging method that large-scale steel ingot directly pulls out in advance |
| CN106975719A (en) * | 2017-06-01 | 2017-07-25 | 东南大学 | A kind of forging method of cogging |
| CN206738284U (en) * | 2017-02-23 | 2017-12-12 | 中聚信海洋工程装备有限公司 | The hydraulic circuit that anvil block is locked on a kind of hydrostatic forging machine |
| CN108246945A (en) * | 2017-12-13 | 2018-07-06 | 陕西宏远航空锻造有限责任公司 | A kind of forging method for improving heat-resisting steel forgings impact property |
| CN109500330A (en) * | 2017-09-14 | 2019-03-22 | 宝钢特钢有限公司 | A kind of cogging method of the big size ingot-casting of nickel-base alloy |
| CN111375714A (en) * | 2018-12-27 | 2020-07-07 | 宝武特种冶金有限公司 | Forging method for improving yield of electroslag ingot H13 large flat blank |
| CN111644548A (en) * | 2020-06-12 | 2020-09-11 | 无锡派克新材料科技股份有限公司 | Forging-modifying technology for high-strength homogeneous aluminum alloy forging for spaceflight |
| CN112893727A (en) * | 2021-02-26 | 2021-06-04 | 陕西长羽航空装备有限公司 | Forging process of magnesium-lithium alloy |
| CN113926973A (en) * | 2021-10-28 | 2022-01-14 | 中聚信海洋工程装备有限公司 | Combined anvil die and process for forging large crank throw |
-
2022
- 2022-01-20 CN CN202210065615.7A patent/CN114309411A/en not_active Withdrawn
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5039355A (en) * | 1989-03-22 | 1991-08-13 | Daumas Marie T | Process for obtaining parts made of copper of very fine texture from a billet made by continuous casting |
| WO2008106858A1 (en) * | 2007-03-05 | 2008-09-12 | Guizhou Anda Aviation Forging Co., Ltd. | A quasi-isothermal forging method of a disk shaped forging of nickel-base superalloys in air |
| CN102319849A (en) * | 2011-07-06 | 2012-01-18 | 中国第一重型机械股份公司 | The forging method that large-scale steel ingot directly pulls out in advance |
| CN206738284U (en) * | 2017-02-23 | 2017-12-12 | 中聚信海洋工程装备有限公司 | The hydraulic circuit that anvil block is locked on a kind of hydrostatic forging machine |
| CN106975719A (en) * | 2017-06-01 | 2017-07-25 | 东南大学 | A kind of forging method of cogging |
| CN109500330A (en) * | 2017-09-14 | 2019-03-22 | 宝钢特钢有限公司 | A kind of cogging method of the big size ingot-casting of nickel-base alloy |
| CN108246945A (en) * | 2017-12-13 | 2018-07-06 | 陕西宏远航空锻造有限责任公司 | A kind of forging method for improving heat-resisting steel forgings impact property |
| CN111375714A (en) * | 2018-12-27 | 2020-07-07 | 宝武特种冶金有限公司 | Forging method for improving yield of electroslag ingot H13 large flat blank |
| CN111644548A (en) * | 2020-06-12 | 2020-09-11 | 无锡派克新材料科技股份有限公司 | Forging-modifying technology for high-strength homogeneous aluminum alloy forging for spaceflight |
| CN112893727A (en) * | 2021-02-26 | 2021-06-04 | 陕西长羽航空装备有限公司 | Forging process of magnesium-lithium alloy |
| CN113926973A (en) * | 2021-10-28 | 2022-01-14 | 中聚信海洋工程装备有限公司 | Combined anvil die and process for forging large crank throw |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023138030A1 (en) * | 2022-01-20 | 2023-07-27 | 中聚信海洋工程装备有限公司 | Two-fire forming forging process for large crank throw |
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Application publication date: 20220412 |