CN102814441A - Cold forging method and cold extrusion mould - Google Patents
Cold forging method and cold extrusion mould Download PDFInfo
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- CN102814441A CN102814441A CN2012102815101A CN201210281510A CN102814441A CN 102814441 A CN102814441 A CN 102814441A CN 2012102815101 A CN2012102815101 A CN 2012102815101A CN 201210281510 A CN201210281510 A CN 201210281510A CN 102814441 A CN102814441 A CN 102814441A
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- endoporus
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- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000010273 cold forging Methods 0.000 title claims abstract description 25
- 238000000641 cold extrusion Methods 0.000 title claims abstract description 10
- 238000005242 forging Methods 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 23
- 239000012530 fluid Substances 0.000 claims description 16
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 6
- 230000002950 deficient Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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Abstract
The invention discloses a cold forging method which comprises a cold extrusion working procedure and a forming working procedure, wherein in the cold extrusion working procedure, a blank is extruded to form a forging stock through a cold extrusion mould, and the forging stock comprises a cylindrical cylinder with an inner bore and a branch body which is connected with the bottom of the cylindrical cylinder; and in the forming working procedure, superfluous materials in the forging stock are removed to obtain a part with the inner bore. Compared with the prior art, according to the cold forging method, in the cold extrusion working procedure, the material arranged in the inner bore of the part of the blank in a material feeding chamber of the cold extrusion mould is branched through a branch chamber so as to form the cylindrical cylinder with the inner bore and the forging stock connected with the branch body at the bottom of the cylindrical cylinder; and the superfluous materials in the forging stock are removed to obtain the part with the inner bore. As the branch chamber is adopted to branch, the parts which are not suitable for being cold forged and reversely extruded can be processed by adopting the method, so that not only the production efficiency is improved, but also the precision of the product is ensured.
Description
[technical field]
The present invention relates to metal precision forging field, particularly a kind of cold forging method and cold-extruded mould.
[background technology]
In the prior art, often adopt the cold forging backward extrusion technology to forge to have the part of endoporus, advantage such as this technology has the working (machining) efficiency height, and spillage of material is low.Please refer to shown in Figure 1, its parts sectional view for adopting existing cold forging backward extrusion technology to obtain.This part is the tubular cylinder with endoporus.Its outside diameter is D, and diameter of bore is d, and bucket base thickness degree is b, and sidewall thickness is t, and the oral area defective is c.Because therefore the restriction of raw-material performance (such as yield point strength, tensile strength, percentage elongation etc.) and indirect-extrusion mould intensity, also has corresponding requirement to the size that is suitable for such part of backward extrusion technology forging.Concrete, reasonably dimensional requirement is base thickness b>=0.8t, deflection ε=d
2/ D
2Claimed range be 15%～80%, oral area defective c ≈ 0.3t simultaneously.Generally adopt other efficient cut class methods on the low side to make for the part that does not meet this requirement with endoporus.But the part that adopts the manufacturing of cut class methods to have endoporus makes high material consumption, working (machining) efficiency low, thereby has increased product cost.
Therefore, be necessary to propose a kind of improved technical scheme and solve the problems referred to above.
[summary of the invention]
One of the object of the invention is to provide a kind of cold forging method, and it can forge the part with endoporus of multiple size, and can enhance productivity, guarantee the product precision.
Two of the object of the invention is to provide a kind of cold-extruded mould, and it can forge the part with endoporus of multiple size, and can enhance productivity, guarantee the product precision.
In order to address the above problem; According to an aspect of the present invention; The invention provides a kind of cold forging method; It comprises cold-extruded and shaping, and said cold-extruded is for to push the formation forging stock through the cold-extruded mould to blank, and said forging stock comprises tubular cylinder with endoporus and the branch fluid that links to each other with tubular cylinder bottom; The said excess stock removed in the forging stock of being configured as is to obtain having the part of endoporus.
Further, the branch fluid that the employing cutting way cuts away said forging stock in said forming process is to obtain having the cylinder part of blind hole.
Further, in said forming process, adopt the stamping-out mode part that the endoporus of the tubular cylinder in the said forging stock is corresponding to remove to obtain having the cylinder part of through hole.
Further, said cold-extruded mould comprises upper punch, is formed with the counterdie in pan feeding chamber and shunting chamber, and the outer shape of said upper punch and the endoporus of part are consistent; Said pan feeding chamber is used to hold blank, and its shape is consistent with the profile of blank; Said shunting chamber is arranged at the bottom in said pan feeding chamber, and communicates with the bottom in pan feeding chamber through the diffluence pass on the shunting chamber, and said shunting chamber and said pan feeding chamber are coaxial cavity.
Further, said shunting chamber is a cylinder, and its shunting chamber diameter is less than the diameter of bore of part.
Further, the diameter of bore of said part is 1.05 times a shunting chamber diameter.Further again, said cold-extruded operation comprises: the pan feeding chamber of said blank being put into counterdie; Upper punch moves downward; When upper punch is fitted blank fully, the stressed increase of blank, the material that is positioned at endoporus in the blank is shunted through the shunting chamber of bottom, pan feeding chamber; When upper punch came downwards to lowest order, said cold-extruded operation was accomplished, and formed the forging stock of tubular cylinder with endoporus and the branch fluid that links to each other with tubular cylinder bottom.
According to a further aspect in the invention, the present invention proposes a kind of cold-extruded mould, and it comprises upper punch, is formed with the counterdie in pan feeding chamber and shunting chamber, and the outer shape of said upper punch and the endoporus of part are consistent; Said pan feeding chamber is used to hold blank, and its shape is consistent with the profile of blank; Said shunting chamber is arranged at the bottom in said pan feeding chamber, and communicates with the bottom in pan feeding chamber through the diffluence pass on the shunting chamber, and said shunting chamber and said pan feeding chamber are coaxial cavity.
Further, said shunting chamber is a cylinder, and the diameter of bore of said part is 1.05 times a shunting chamber diameter.
Further, said cold extrusion forming inner chamber operation comprises: the pan feeding chamber of said round blank being put into counterdie; Upper punch moves downward; When upper punch is fitted blank fully, the stressed increase of blank, the material that is positioned at endoporus in the blank is shunted through the shunting chamber of bottom, pan feeding chamber; When upper punch came downwards to lowest order, said cold-extruded operation was accomplished, and formed the forging stock of tubular cylinder with endoporus and the branch fluid that links to each other with tubular cylinder bottom.
Compared with prior art; Cold forging method of the present invention comprises cold-extruded operation and forming process; Wherein, In the cold-extruded operation, the material that is positioned at the part endoporus that is put in the blank in the cold-extruded mould pan feeding chamber is shunted through the shunting chamber, thereby formed the forging stock of tubular cylinder with endoporus and the branch fluid that links to each other with tubular cylinder bottom; Then the excess stock in the forging stock is removed, thereby obtained having the product parts of endoporus.Owing to adopt the shunting chamber to shunt, make the part that is not suitable for adopting cold forging instead to squeeze also can adopt the method among the present invention to process, like this, not only can enhance productivity, and can guarantee the product precision.
[description of drawings]
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.Wherein:
The parts sectional view of Fig. 1 for adopting existing cold forging backward extrusion technology to obtain;
Fig. 2 forges the cold forging method process chart in one embodiment of the forging with endoporus for the present invention;
The shape of product that Fig. 3 (a) obtains for the cold-extruded operation;
Fig. 3 (b) for the branch fluid that adopts cutting way and cut away forging stock described in Fig. 3 (a) to obtain having the cylinder part of blind hole;
Fig. 3 (c) removes to obtain having the cylinder part of through hole for adopting the stamping-out mode part that the endoporus of the tubular cylinder in the forging stock described in Fig. 3 (a) is corresponding; With
Fig. 4 is the present invention shape of product change procedure figure in one embodiment.
[specific embodiment]
For make above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, below in conjunction with accompanying drawing and the specific embodiment the present invention done further detailed explanation.
Alleged here " embodiment " or " embodiment " are meant special characteristic, structure or the characteristic that can be contained at least one implementation of the present invention.Different in this manual local " in one embodiment " that occur not are all to refer to same embodiment, neither be independent or optionally mutually exclusive with other embodiment embodiment.
Cold forging method of the present invention comprises cold-extruded operation and forming process; Wherein, In the cold-extruded operation; The material that is positioned at the part endoporus that is put in the blank in the cold-extruded mould pan feeding chamber is shunted through the shunting chamber, thereby formed tubular cylinder with endoporus and the forging stock of the branch fluid that bottom the tubular cylinder, links to each other; Then the excess stock in the forging stock is removed, thereby obtained having the part of endoporus.Like this, not only can enhance productivity, and can guarantee the product precision.
Please refer to shown in Figure 2ly, it has the cold forging method process chart in one embodiment of the forging of endoporus for the present invention forges.Please refer to shown in Figure 3ly, it is the present invention shape of product change procedure figure in one embodiment.Specifically introduce technological process shown in Figure 2 below in conjunction with Fig. 3.
Said technological process comprises the steps.
Said cold-extruded is for to push the formation forging stock through the cold-extruded mould to blank, and said forging stock comprises tubular cylinder with endoporus and the branch fluid that links to each other with tubular cylinder bottom;
Please refer to shown in Figure 4ly, it is to utilize cold-extruded mould among the present invention to carry out the product shaping procedure chart of cold-extruded operation.
Cold-extruded mould among the figure comprises upper punch 410, is formed with the counterdie 420 in pan feeding chamber 422 and shunting chamber 424.
The endoporus of the outer shape of said upper punch 410 and part (perhaps being called forging) is consistent.In the present embodiment, upper punch 410 is a cylinder, and its outside diameter is d1 (endoporus that is part is a cylinder, and diameter of bore is d1).
Said pan feeding chamber 422 is used to hold blank 430, and its shape is consistent with the profile of blank 430.In the present embodiment, said pan feeding chamber 422 be shaped as cylinder, its chamber interior diameter is D (be the cylinder that is shaped as of blank, its outside diameter is D), and D＞d1.
Said shunting chamber 424 is arranged at the bottom in said pan feeding chamber 422, and communicates with the bottom in pan feeding chamber through the diffluence pass on the shunting chamber 424, and said shunting chamber and said pan feeding chamber are coaxial cavity.In the present embodiment, said shunting chamber 424 is a cylinder, and the chamber interior diameter in its shunting chamber is d2, and the chamber interior diameter d2 in shunting chamber is less than the diameter of bore d1 of part.Preferably, d1 ≈ 1.05d2.
Next introducing in detail utilizes the cold-extruded mould to carry out the process of cold-extruded.
Said blank 430 is put into the pan feeding chamber 422 of counterdie; Upper punch 410 moves downward; When upper punch 410 is fitted blank 430 fully; The stressed increase of blank; Because upper punch 410 sizes are less than the excircle dimension of said blank 430; Under the situation of said blank 430 stressed increases, be positioned at the material of part endoporus in said upper punch 410 extrusion billets, the material that is positioned at endoporus in the blank is shunted through the shunting chamber of bottom, pan feeding chamber; When upper punch 410 came downwards to lowest order, said cold-extruded operation was accomplished, and formed the forging stock of tubular cylinder with endoporus and the branch fluid that links to each other with tubular cylinder bottom.
The shape of product that Fig. 3 (a) obtains for the cold-extruded operation, the forging stock that it comprises the tubular cylinder with endoporus and divides fluid the column that bottom the tubular cylinder, links to each other.Wherein, the outside diameter that has the tubular barrel portion of endoporus in the forging stock is D, and diameter of bore is d1, and bucket base thickness degree is b1, and sidewall thickness is t1, and the oral area defective is c1; It is d2 that column in the forging stock is divided the outside diameter of fluid, and d2 is slightly less than d1, d1 ≈ 1.05d2.
Because the intracavity diameter d2 in cold-extruded mould shunting chamber is slightly less than the diameter of bore d1 of part.Preferably, d1 ≈ 1.05d2.Therefore; In the cold extrusion process, can make the material monolithic that is positioned at the part endoporus of the blank that is put in the pan feeding chamber 522 move to shunting chamber 430, because the intracavity diameter d2 in shunting chamber is littler than the diameter of bore d1 of part; Make product material when the extruding of shunting chamber 430, produce compression, do not have the material tearing defect when endoporus of forging stock is shaped.Owing to the material that is positioned at the part endoporus in the blank is to move to the shunting chamber, can make forging stock can not produce the angular defect of collapsing of oral area c1 in addition.
Remove the excess stock in the forging stock, thereby obtain having the part of endoporus.
3 (b) for the branch fluid that in said forming process, adopts cutting way and cut away forging stock described in Fig. 3 (a) to obtain having the cylinder part of blind hole.The outside diameter of this part is D, and diameter of bore is d1, and bucket base thickness degree is b1, and sidewall thickness is t1, and the oral area defective is c1.
3 (c) remove to obtain having the cylinder part of through hole in said forming process, adopting the stamping-out mode part that the endoporus of tubular cylinder in the forging stock described in Fig. 3 (a) is corresponding.
Cold forging method of the present invention comprises cold-extruded operation and forming process; Wherein said cold-extruded operation is for to push blank through the cold-extruded mould; Because the cold-extruded mould includes material chamber 422 and the shunting chamber that is arranged at bottom, pan feeding chamber, and the intracavity diameter d2 in shunting chamber is less than the diameter of bore d1 of part.Preferably, d1 ≈ 1.05d2.This dimensional requirement is in the cold extrusion process; Make the material monolithic that is positioned at the part endoporus of the blank that is put in the pan feeding chamber 422 move to shunting chamber 430; Because the intracavity diameter d2 in shunting chamber is littler than the diameter of bore d1 of part; Make product material when the extruding of shunting chamber 430, produce compression, do not have the material tearing defect when endoporus of forging stock is shaped.Owing to the material that is positioned at the part endoporus in the blank is to move to the shunting chamber, can make part can not produce the angular defect of collapsing of oral area c in addition.Thereby make cold forging method of the present invention not be only applicable to forge the part that base thickness is far smaller than wall thickness, and go for not in the reasonable scope part of deflection with endoporus with endoporus.
Through the part with endoporus (part shown in Fig. 3 (b) and Fig. 3 (c)) its oral area defective c1≤0.05t that cold forging method of the present invention makes, base thickness b1 can be reduced to 2mm.Deflection ε=d
2/ D
2Claimed range be 15%～80%, thereby the part that makes the manufacturing of common employing cut class methods have endoporus can make through cold forging method of the present invention, like this, not only can enhance productivity, and can guarantee the product precision.
Above-mentioned explanation has fully disclosed the specific embodiment of the present invention.It is pointed out that any change that technical staff's specific embodiments of the invention of being familiar with this field is done does not all break away from the scope of claims of the present invention.Correspondingly, the scope of claim of the present invention also is not limited only to previous embodiment.
Claims (10)
1. a cold forging method is characterized in that, it comprises cold-extruded and shaping,
Said cold-extruded is for to push the formation forging stock through the cold-extruded mould to blank, and said forging stock comprises tubular cylinder with endoporus and the branch fluid that links to each other with tubular cylinder bottom;
The said excess stock removed in the forging stock of being configured as is to obtain having the part of endoporus.
2. cold forging method according to claim 1 is characterized in that, the branch fluid that the employing cutting way cuts away said forging stock in said forming process is to obtain having the cylinder part of blind hole.
3. cold forging method according to claim 1 is characterized in that, in said forming process, adopts the stamping-out mode part that the endoporus of the tubular cylinder in the said forging stock is corresponding to remove to obtain having the cylinder part of through hole.
4. according to claim 1,2 or 3 described cold forging methods, it is characterized in that said cold-extruded mould comprises upper punch, be formed with the counterdie in pan feeding chamber and shunting chamber,
The outer shape of said upper punch and the endoporus of part are consistent;
Said pan feeding chamber is used to hold blank, and its shape is consistent with the profile of blank;
Said shunting chamber is arranged at the bottom in said pan feeding chamber, and communicates with the bottom in pan feeding chamber through the diffluence pass on the shunting chamber, and said shunting chamber and said pan feeding chamber are coaxial cavity.
5. cold forging method according to claim 4 is characterized in that, said shunting chamber is a cylinder, and its shunting chamber diameter is less than the diameter of bore of part.
6. cold forging method according to claim 5 is characterized in that, the diameter of bore of said part is 1.05 times a shunting chamber diameter.
7. forging method according to claim 4 is characterized in that, said cold-extruded operation comprises:
Said blank is put into the pan feeding chamber of counterdie;
Upper punch moves downward;
When upper punch is fitted blank fully, the stressed increase of blank, the material that is positioned at endoporus in the blank is shunted through the shunting chamber of bottom, pan feeding chamber;
When upper punch came downwards to lowest order, said cold-extruded operation was accomplished, and formed the forging stock of tubular cylinder with endoporus and the branch fluid that links to each other with tubular cylinder bottom.
8. a cold-extruded mould is characterized in that it comprises upper punch, is formed with the counterdie in pan feeding chamber and shunting chamber,
The outer shape of said upper punch and the endoporus of part are consistent;
Said pan feeding chamber is used to hold blank, and its shape is consistent with the profile of blank;
Said shunting chamber is arranged at the bottom in said pan feeding chamber, and communicates with the bottom in pan feeding chamber through the diffluence pass on the shunting chamber, and said shunting chamber and said pan feeding chamber are coaxial cavity.
9. cold-extruded mould according to claim 8 is characterized in that, said shunting chamber is a cylinder, and the diameter of bore of said part is 1.05 times a shunting chamber diameter.
10. according to Claim 8 or 9 described cold-extruded moulds, it is characterized in that said cold extrusion forming inner chamber operation comprises:
Said round blank is put into the pan feeding chamber of counterdie;
Upper punch moves downward;
When upper punch is fitted blank fully, the stressed increase of blank, the material that is positioned at endoporus in the blank is shunted through the shunting chamber of bottom, pan feeding chamber;
When upper punch came downwards to lowest order, said cold-extruded operation was accomplished, and formed the forging stock of tubular cylinder with endoporus and the branch fluid that links to each other with tubular cylinder bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210281510.1A CN102814441B (en) | 2012-08-09 | 2012-08-09 | Cold forging method and cold extrusion mould |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210281510.1A CN102814441B (en) | 2012-08-09 | 2012-08-09 | Cold forging method and cold extrusion mould |
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| Publication Number | Publication Date |
|---|---|
| CN102814441A true CN102814441A (en) | 2012-12-12 |
| CN102814441B CN102814441B (en) | 2015-05-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103611859A (en) * | 2013-11-18 | 2014-03-05 | 梧州恒声电子科技有限公司 | Method for cold precision forging of T-shaped iron by mesoporous flow distribution technology |
| CN109550802A (en) * | 2018-12-14 | 2019-04-02 | 江西福格新能源传动技术有限公司 | A kind of differential gear axial direction shunting cold-extrusion shaping apparatus and method |
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| CN1646244A (en) * | 2002-11-12 | 2005-07-27 | 阿马法服务有限责任公司 | Methods for the cold extrusion of metallic elements with dead or through holes and plant for carrying out said methods |
| CN101518793A (en) * | 2009-03-26 | 2009-09-02 | 陈志波 | Cold extruding and forming process of lower oil cylinder of manual porter |
| CN201832860U (en) * | 2010-09-10 | 2011-05-18 | 江苏威鹰机械有限公司 | Closed end blind hole cold extrusion forming die of energy accumulator shell |
| CN202804052U (en) * | 2012-08-09 | 2013-03-20 | 江苏森威集团飞达股份有限公司 | Cold extrusion mould |
-
2012
- 2012-08-09 CN CN201210281510.1A patent/CN102814441B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1646244A (en) * | 2002-11-12 | 2005-07-27 | 阿马法服务有限责任公司 | Methods for the cold extrusion of metallic elements with dead or through holes and plant for carrying out said methods |
| CN101518793A (en) * | 2009-03-26 | 2009-09-02 | 陈志波 | Cold extruding and forming process of lower oil cylinder of manual porter |
| CN201832860U (en) * | 2010-09-10 | 2011-05-18 | 江苏威鹰机械有限公司 | Closed end blind hole cold extrusion forming die of energy accumulator shell |
| CN202804052U (en) * | 2012-08-09 | 2013-03-20 | 江苏森威集团飞达股份有限公司 | Cold extrusion mould |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103611859A (en) * | 2013-11-18 | 2014-03-05 | 梧州恒声电子科技有限公司 | Method for cold precision forging of T-shaped iron by mesoporous flow distribution technology |
| CN109550802A (en) * | 2018-12-14 | 2019-04-02 | 江西福格新能源传动技术有限公司 | A kind of differential gear axial direction shunting cold-extrusion shaping apparatus and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102814441B (en) | 2015-05-20 |
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Effective date of registration: 20210617 Address after: 224100 6, Jinfeng South Street, Dafeng District, Yancheng City, Jiangsu. Patentee after: Dafeng District Productivity Promotion Center, Yancheng City Address before: 224100 No.9, Feida East Road, Dafeng City, Yancheng City, Jiangsu Province Patentee before: JIANGSU SUNWAY GROUP FEIDA Co.,Ltd. |
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Application publication date: 20121212 Assignee: Yancheng Hengchang Automobile Fittings Co.,Ltd. Assignor: Dafeng District Productivity Promotion Center, Yancheng City Contract record no.: X2023980044822 Denomination of invention: A Cold Forging Method and Cold Extrusion Die Granted publication date: 20150520 License type: Common License Record date: 20231031 |
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Application publication date: 20121212 Assignee: Yancheng Dafeng Chuangyi precision forging gear Co.,Ltd. Assignor: Dafeng District Productivity Promotion Center, Yancheng City Contract record no.: X2023980046519 Denomination of invention: A Cold Forging Method and Cold Extrusion Mold Granted publication date: 20150520 License type: Common License Record date: 20231113 Application publication date: 20121212 Assignee: JIANGSU CHUANGYI PRECISION FORGING Co.,Ltd. Assignor: Dafeng District Productivity Promotion Center, Yancheng City Contract record no.: X2023980046393 Denomination of invention: A Cold Forging Method and Cold Extrusion Mold Granted publication date: 20150520 License type: Common License Record date: 20231113 Application publication date: 20121212 Assignee: JIANGSU FENGTAI FLUID MACHINERY TECHNOLOGY Co.,Ltd. Assignor: Dafeng District Productivity Promotion Center, Yancheng City Contract record no.: X2023980046390 Denomination of invention: A Cold Forging Method and Cold Extrusion Mold Granted publication date: 20150520 License type: Common License Record date: 20231113 Application publication date: 20121212 Assignee: JIANGSU YANFA MACHINERY CO.,LTD. Assignor: Dafeng District Productivity Promotion Center, Yancheng City Contract record no.: X2023980046385 Denomination of invention: A Cold Forging Method and Cold Extrusion Mold Granted publication date: 20150520 License type: Common License Record date: 20231113 |
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Assignee: JIANGSU FENGTAI FLUID MACHINERY TECHNOLOGY Co.,Ltd. Assignor: Dafeng District Productivity Promotion Center, Yancheng City Contract record no.: X2023980046390 Date of cancellation: 20240930 |