CN114178466A - Gear warm forging process - Google Patents
Gear warm forging process Download PDFInfo
- Publication number
- CN114178466A CN114178466A CN202111529052.4A CN202111529052A CN114178466A CN 114178466 A CN114178466 A CN 114178466A CN 202111529052 A CN202111529052 A CN 202111529052A CN 114178466 A CN114178466 A CN 114178466A
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- CN
- China
- Prior art keywords
- section
- forging
- raw materials
- gear
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005242 forging Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000002994 raw material Substances 0.000 claims abstract description 24
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 4
- 239000010439 graphite Substances 0.000 claims abstract description 4
- 238000005507 spraying Methods 0.000 claims abstract description 4
- 238000004321 preservation Methods 0.000 claims description 9
- 238000005485 electric heating Methods 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000003223 protective agent Substances 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000314 lubricant Substances 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
Images
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
- B21K1/28—Making machine elements wheels; discs
- B21K1/30—Making machine elements wheels; discs with gear-teeth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/02—Preliminary treatment of metal stock without particular shaping, e.g. salvaging segregated zones, forging or pressing in the rough
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
-
- 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
- B21K29/00—Arrangements for heating or cooling during processing
Abstract
The invention discloses a warm forging process for a gear, which comprises the following steps: the raw materials are automatically fed and discharged through a discharging chain and then enter the intermediate frequency furnace; preheating in a medium frequency furnace, spraying a graphite lubricant, and heating to enable the raw material to reach the forging temperature; the raw materials enter a three-station warm forging machine for forging step by step; the forged parts enter an air cooling conveying chain for cooling and are conveyed to a temperature control furnace; preserving heat in a temperature control furnace to eliminate stress; and (4) rapidly cooling the rear section of the temperature control furnace. The invention adopts the three-station warm forging machine to forge the heated raw materials step by step, improves the production efficiency, does not need repeated heating in the step-by-step forging process, reduces the energy consumption, and is energy-saving and environment-friendly.
Description
Technical Field
The invention relates to a warm forging process for a gear.
Background
The forging piece is heated to about 950 ℃ during gear forging and then forged, in the existing forging process, because the gear is forged step by step, the forging piece can be cooled to room temperature during the transfer process of pre-forging and precision forging equipment, and when precision forging is needed, the forging piece also needs to be heated, so that a large amount of energy is consumed.
Disclosure of Invention
The invention relates to a warm forging process for gears, which can reduce energy consumed by reheating in the forging process.
In order to realize the purpose, the method adopted by the invention is as follows: the gear warm forging process comprises the following process steps:
(1) introducing the raw materials into a feeding machine for automatic feeding, and feeding the raw materials into an intermediate frequency furnace through a discharging chain;
(2) the method comprises the following steps that a preheating section, a spraying section and a heating section are sequentially arranged in an intermediate frequency furnace, after the raw materials are heated to 200 ℃ in the preheating section, a graphite protective agent is sprayed on the surface of the raw materials for oxidation protection, and the raw materials are heated to a forging temperature of 850-900 ℃ in the heating section;
(3) the raw materials heated to the forging temperature enter a slideway and are conveyed into a warm forging machine, the warm forging machine is a three-station warm forging machine, three groups of dies are used for forging and pressing at the same time, and pre-forging, finish forging and trimming are sequentially carried out to form gear pieces, and conveying between stations is realized by an automatic stepping beam;
(4) the molded gear piece enters an air-cooling conveying chain, a fan is arranged in the air-cooling conveying chain to cool the gear to 630-710 ℃, and the gear is conveyed to a temperature control furnace;
the front section of the temperature control furnace is a heat preservation section, the rear section of the temperature control furnace is a cooling section, a temperature supplementing electric heating wire is arranged in the heat preservation section, the gear enters the heat preservation section and is preserved for 1 hour at 680 ℃ to eliminate stress, a cold air pipe is arranged in the cooling section, and cold air circulating in the cold air pipe reduces the environment temperature of the cold air section, so that the gear is rapidly cooled to 350 ℃.
The beneficial effects are as follows: the invention adopts the three-station warm forging machine to forge the heated raw materials step by step, improves the production efficiency, does not need repeated heating in the step-by-step forging process, reduces the energy consumption, and is energy-saving and environment-friendly.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is an apparatus diagram of a warm forging process for gears according to the present invention.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The warm forging process of the gear adopts an equipment chain as shown in figure 1, and comprises the following process steps:
(1) the method comprises the following steps of (1) introducing raw materials into a feeding machine 1 for automatic feeding, and feeding the raw materials into an intermediate frequency furnace 3 through a discharging chain 2;
(2) the intermediate frequency furnace 3 is sequentially provided with a preheating section, a spraying section and a heating section, the raw materials are heated to 200 ℃ in the preheating section, then a graphite protective agent is sprayed on the surface of the raw materials for oxidation protection, and the raw materials are heated to a forging temperature of 850-900 ℃ in the heating section;
(3) the raw materials heated to the forging temperature enter a slideway 4 and are conveyed into a warm forging machine 5, the warm forging machine 5 is a three-station warm forging machine, three groups of dies are used for forging and pressing at the same time, and pre-forging, finish forging and trimming are sequentially carried out to form gear pieces, and conveying among stations is realized by an automatic walking beam;
(4) the molded gear piece enters an air-cooled conveying chain 6, a fan is arranged in the air-cooled conveying chain 6 to cool the gear to 630-710 ℃, and the cooled gear is conveyed to a temperature control furnace 7;
(5) the front section of the temperature control furnace 7 is a heat preservation section, the rear section is a cooling section, a temperature supplementing electric heating wire is arranged in the heat preservation section, the gear enters the heat preservation section and is preserved for 1 hour at 680 ℃ to eliminate stress, cold air pipes are distributed in the cooling section, and cold air circulating in the cold air pipes reduces the environment temperature of the cold air section, so that the gear is rapidly cooled to 350 ℃.
The invention adopts the three-station warm forging machine to forge the heated raw materials step by step, improves the production efficiency, does not need repeated heating in the step-by-step forging process, reduces the energy consumption, and is energy-saving and environment-friendly.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (1)
1. The gear warm forging process is characterized by comprising the following process steps:
(1) introducing the raw materials into a feeding machine for automatic feeding, and feeding the raw materials into an intermediate frequency furnace through a discharging chain;
(2) the method comprises the following steps that a preheating section, a spraying section and a heating section are sequentially arranged in an intermediate frequency furnace, after the raw materials are heated to 200 ℃ in the preheating section, a graphite protective agent is sprayed on the surface of the raw materials for oxidation protection, and the raw materials are heated to a forging temperature of 850-900 ℃ in the heating section;
(3) the raw materials heated to the forging temperature enter a slideway and are conveyed into a warm forging machine, the warm forging machine is a three-station warm forging machine, three groups of dies are used for forging and pressing at the same time, and pre-forging, finish forging and trimming are sequentially carried out to form gear pieces, and conveying between stations is realized by an automatic stepping beam;
(4) the molded gear piece enters an air-cooling conveying chain, a fan is arranged in the air-cooling conveying chain to cool the gear to 630-710 ℃, and the gear is conveyed to a temperature control furnace;
(5) the front section of the temperature control furnace is a heat preservation section, the rear section of the temperature control furnace is a cooling section, a temperature supplementing electric heating wire is arranged in the heat preservation section, the gear enters the heat preservation section and is preserved for 1 hour at 680 ℃ to eliminate stress, a cold air pipe is arranged in the cooling section, and cold air circulating in the cold air pipe reduces the environment temperature of the cold air section, so that the gear is rapidly cooled to 350 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111529052.4A CN114178466A (en) | 2021-12-15 | 2021-12-15 | Gear warm forging process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111529052.4A CN114178466A (en) | 2021-12-15 | 2021-12-15 | Gear warm forging process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114178466A true CN114178466A (en) | 2022-03-15 |
Family
ID=80543776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111529052.4A Pending CN114178466A (en) | 2021-12-15 | 2021-12-15 | Gear warm forging process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114178466A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101363077A (en) * | 2008-09-10 | 2009-02-11 | 江苏太平洋精密锻造有限公司 | Isothermal spheroidizing technology of cold precision forging gear blank |
| CN101773976A (en) * | 2009-12-23 | 2010-07-14 | 青岛三星精锻齿轮有限公司 | Precision-forging anti-oxidization heating protective producing process of straight bevel gears of differentials |
| CN103045985A (en) * | 2012-12-20 | 2013-04-17 | 上海中盟石油天然气有限公司 | Surface strengthening and protection process for steel-body PDC drill bit |
| CN103495691A (en) * | 2013-08-08 | 2014-01-08 | 兴城市粉末冶金有限公司 | Anti-oxidation method for forging double-drive-axle triple gear |
| CN103658498A (en) * | 2012-09-18 | 2014-03-26 | 上海华镛精密机械有限公司 | Forging method for warm-forging inner star wheel |
| CN105964874A (en) * | 2016-06-08 | 2016-09-28 | 董超超 | Cooling device for high-precision gear forging machining |
| CN109722632A (en) * | 2017-10-31 | 2019-05-07 | 陕西南水汽车配件制造有限公司 | A kind of aluminum alloy control arm forging coarse grains on surface ring control method |
| CN208901889U (en) * | 2018-08-28 | 2019-05-24 | 武陟县虹桥碳素有限责任公司 | A kind of intermediate frequency furnace graphite crucible |
| CN110153662A (en) * | 2019-05-27 | 2019-08-23 | 上齿集团有限公司 | A kind of production technology of ring gear gear |
| CN111761010A (en) * | 2020-06-17 | 2020-10-13 | 盐城中德精锻股份有限公司 | Warm forging process for valve cover with full hexagonal appearance |
-
2021
- 2021-12-15 CN CN202111529052.4A patent/CN114178466A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101363077A (en) * | 2008-09-10 | 2009-02-11 | 江苏太平洋精密锻造有限公司 | Isothermal spheroidizing technology of cold precision forging gear blank |
| CN101773976A (en) * | 2009-12-23 | 2010-07-14 | 青岛三星精锻齿轮有限公司 | Precision-forging anti-oxidization heating protective producing process of straight bevel gears of differentials |
| CN103658498A (en) * | 2012-09-18 | 2014-03-26 | 上海华镛精密机械有限公司 | Forging method for warm-forging inner star wheel |
| CN103045985A (en) * | 2012-12-20 | 2013-04-17 | 上海中盟石油天然气有限公司 | Surface strengthening and protection process for steel-body PDC drill bit |
| CN103495691A (en) * | 2013-08-08 | 2014-01-08 | 兴城市粉末冶金有限公司 | Anti-oxidation method for forging double-drive-axle triple gear |
| CN105964874A (en) * | 2016-06-08 | 2016-09-28 | 董超超 | Cooling device for high-precision gear forging machining |
| CN109722632A (en) * | 2017-10-31 | 2019-05-07 | 陕西南水汽车配件制造有限公司 | A kind of aluminum alloy control arm forging coarse grains on surface ring control method |
| CN208901889U (en) * | 2018-08-28 | 2019-05-24 | 武陟县虹桥碳素有限责任公司 | A kind of intermediate frequency furnace graphite crucible |
| CN110153662A (en) * | 2019-05-27 | 2019-08-23 | 上齿集团有限公司 | A kind of production technology of ring gear gear |
| CN111761010A (en) * | 2020-06-17 | 2020-10-13 | 盐城中德精锻股份有限公司 | Warm forging process for valve cover with full hexagonal appearance |
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