CN103357805B - The method for forging and molding of pin rail - Google Patents
The method for forging and molding of pin rail Download PDFInfo
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- CN103357805B CN103357805B CN201310269711.4A CN201310269711A CN103357805B CN 103357805 B CN103357805 B CN 103357805B CN 201310269711 A CN201310269711 A CN 201310269711A CN 103357805 B CN103357805 B CN 103357805B
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Abstract
The invention discloses a kind of method for forging and molding of pin rail, the steps include: heating, base, blocking, finish-forging, hot trimming, thermal recalibration; It is characterized in that: Preform Die and the as a whole mould of finish-forging die, improve production efficiency, and the wall thickness of mould adds more than one times, effectively prevent the cracking phenomena of mould, improve die life.The method has also used a shaving die simultaneously, comprise trimming punch and trim die, effective containment area of trimming punch and pin rail forging is forging profile of tooth end face and side, width muscle end face and side, containment area is large, not easily produces warpage, the defect such as head, horn mouth of collapsing.
Description
Technical field
The invention belongs to forging molding field, relate to a kind of method for forging and molding of pin rail.
Background technology
Pin rail domestic has at present started to be developed to solid forging mode by the mode such as split welding, monoblock cast before.And the mould of solid forging is substantially all adopt single mode design, the thinner easy generation cracking of this mold wall thickness.One set of die will be scrapped about production 1800 forging, serious waste fund with affect production progress.And when hot trimming, the form that current employing two step is cut, gross weight in the middle of first cutting tooth form, cut the burr of periphery die joint again, the first step earnestly in the middle of gross weight process in cause width muscle to be pulled open because width muscle laterally effectively contains deficiency, width muscle height effectively contains and causes two to tilt not simultaneously; First two width muscle end face contacting tilting causes its two to be collapsed by jumping-up pressure by the process convex mould of the gross weight of the fervent die joint of second step, sells effective containing in rail short transverse and causes middle tilting not cutting in the gross weight process of periphery, add percent defective.
Summary of the invention
In order to overcome above-mentioned shortcoming, the invention provides a kind of method for forging and molding of pin rail, improving the mold use life-span, enhancing productivity.Meanwhile, warpage, the defect such as head, horn mouth of collapsing of pin rail forging is eliminated.
For solving the problem, technical scheme of the present invention is: a kind of method for forging and molding of pin rail, the steps include:
First, blank is loaded in Medium Frequency Induction Heating Furnace and be heated to 1240 ~ 1290 DEG C, by roll forging, die forging, flattening, blank is made the shape with blocking die cavity basic simlarity;
Secondly, Preform Die and finish-forging die are designed to a unitary mould, the distance between blocking die cavity and finish-forging die cavity is 190mm ~ 220mm, and the distance of the outer wall of blocking die cavity or finish-forging die cavity and mould is greater than 150mm; First a pin rail blank is loaded in the blocking die cavity of unitary mould and carry out blocking, then, pin rail blank after this part blocking is put into the finish-forging die cavity of unitary mould, getting a pin rail blank not having blocking to cross again loads in the blocking die cavity of unitary mould, complete the finish-forging of last pin rail and the blocking of a rear pin rail simultaneously, and forge successively;
Secondly, design a shaving die, comprise trimming punch and trim die, the effective female surface of trimming punch to pin rail forging comprises pin rail forging profile of tooth end face and side, width muscle end face and side.And with this shaving die, trimming is carried out to pin rail forging;
Finally, pin rail is corrected.
Beneficial effect of the present invention: finish-forging die patrix and Preform Die patrix are made an entirety, finish-forging die counterdie and Preform Die counterdie and makes an entirety, its wall thickness is more than original twice, effectively avoid the generation of crack of die problem, improve die life, and carry out due to blocking and finish-forging, greatly enhance production efficiency. simultaneouslyIn hot trimming process, the burr of the middle gross weight of cutting tooth form and periphery die joint while of on same shaving die, trimming punch is changed to punch and forging profile of tooth end face and side to effective containment area of pin rail forging by the localized contact of end face on width muscle before, the comprehensive engagement of width muscle end face and side, promote nearly 4 times of effective containment area, effectively solve warpage, collapse the defect problem such as head, horn mouth.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described, wherein:
Fig. 1 is the cavity structure schematic diagram of unitary mould;
Cross section state diagram when Fig. 2 a is trimming punch trimming;
Fig. 2 b is A-A cross-sectional view in Fig. 2 a;
Fig. 3 is the three-dimensional structure diagram of pin rail forging.
Detailed description of the invention
Implement pin rail method for forging and molding of the present invention, need the equipment used to have: Medium Frequency Induction Heating Furnace, Ф 930 forging roll, KP8000 forging press, 800T bead cutter, 1250T inspection machine.The mould used is needed to have: unitary mould and shaving die.
The forging molding process step of this pin rail is as follows:
The first step, heating.Blank is loaded in Medium Frequency Induction Heating Furnace and be heated to 1240 ~ 1290 DEG C.
Second step, base.The blank heated is utilized Ф 930 forging roll, KP8000 forging press, by means such as roll forging, die forging, flattenings, blank is made the shape with blocking die cavity basic simlarity.Initial forging temperature >=1220 DEG C.
3rd step, blocking and finish-forging.As shown in Figure 1, Preform Die and finish-forging die are designed to a unitary mould, the distance between blocking die cavity 2 and finish-forging die cavity 3 is 190mm ~ 220mm, and blocking die cavity 2 or finish-forging die cavity 3 are greater than 150mm with the distance of the outer wall of mould.
First a pin rail blank is loaded in the blocking die cavity of unitary mould and carry out blocking, then the pin rail blank after this part blocking is put into the finish-forging die cavity of unitary mould, getting a pin rail blank not having blocking to cross again loads in the blocking die cavity of unitary mould, complete the finish-forging of last pin rail and the blocking of a rear pin rail simultaneously, and forge successively.Final forging temperature >=1050 DEG C.
4th step, hot trimming.As shown in Figure 2 a and 2 b, design a shaving die, comprise trimming punch 4 and trim die 5, and be arranged on 800T bead cutter with this shaving die, pin rail forging 6 is put on trim die, and carries out trimming; Trimming temperature >=950 DEG C.In trimming process, effective containment area of punch and forging comprises: profile of tooth end face and side, width muscle end face and side.
5th step, thermal recalibration.1250T inspection machine corrects.Tc >=800 DEG C.
Adopt the angularity≤3mm of said method forged pins rail forging 6, without collapsing head and horn mouth phenomenon; Unitary mould is used to produce forging 5498 and have no crackle.
Claims (3)
1. sell a method for forging and molding for rail, it is characterized in that, comprise the following steps:
First, blank is loaded in Medium Frequency Induction Heating Furnace and be heated to 1240 ~ 1290 DEG C, by roll forging, die forging, flattening, blank is made the shape with blocking die cavity basic simlarity;
Secondly, Preform Die and finish-forging die are designed to a unitary mould, the distance between blocking die cavity and finish-forging die cavity is 190mm ~ 220mm, and the distance of the outer wall of blocking die cavity or finish-forging die cavity and mould is greater than 150mm; First a pin rail blank is loaded in the blocking die cavity of unitary mould and carry out blocking, then, pin rail blank after this part blocking is put into the finish-forging die cavity of unitary mould, getting a pin rail blank not having blocking to cross again loads in the blocking die cavity of unitary mould, complete the finish-forging of last pin rail and the blocking of a rear pin rail simultaneously, and forge successively;
Secondly, design a shaving die, comprise trimming punch and trim die, the effective female surface of trimming punch to pin rail forging comprises pin rail forging profile of tooth end face and side, width muscle end face and side; And with this shaving die, trimming is carried out to pin rail forging;
Finally, pin rail is corrected.
2. sell the method for forging and molding of rail according to claim 1, it is characterized in that: the mould that described blocking and finish-forging use is designed to an entirety.
3. sell the method for forging and molding of rail according to claim 1, it is characterized in that: the trimming punch that hot trimming uses, its effective female surface comprises forging toothed surfaces, width muscle end face and side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310269711.4A CN103357805B (en) | 2013-06-30 | 2013-06-30 | The method for forging and molding of pin rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310269711.4A CN103357805B (en) | 2013-06-30 | 2013-06-30 | The method for forging and molding of pin rail |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103357805A CN103357805A (en) | 2013-10-23 |
| CN103357805B true CN103357805B (en) | 2015-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310269711.4A Active CN103357805B (en) | 2013-06-30 | 2013-06-30 | The method for forging and molding of pin rail |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103736889A (en) * | 2014-01-26 | 2014-04-23 | 山西豪钢锻造有限公司 | Pin rail forging forming method |
| CN104259743A (en) * | 2014-07-24 | 2015-01-07 | 江苏利普机械有限公司 | Forging method of alloy steel lock shell forge piece |
| CN106695249B (en) * | 2015-08-13 | 2019-12-13 | 江苏龙城精锻有限公司 | Forging forming process of high-pressure common rail pipe |
| CN106424529B (en) * | 2016-11-28 | 2018-07-27 | 吉林大学 | The forging forming method of triangle aluminum alloy control arm |
| CN113941681A (en) * | 2021-08-31 | 2022-01-18 | 国家高速列车青岛技术创新中心 | Titanium alloy forging forming method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1239473A (en) * | 1968-07-05 | 1971-07-14 | North American Rockwell | Aluminum alloy workpieces |
| CN2846354Y (en) * | 2005-11-14 | 2006-12-13 | 中煤张家口煤矿机械有限责任公司 | Combined mold forging rail base |
| CN202185551U (en) * | 2011-08-04 | 2012-04-11 | 唐亮 | Finish forging stock die for producing track spikes |
| CN102989957A (en) * | 2012-08-17 | 2013-03-27 | 大连大高阀门股份有限公司 | Forging process for rail chair for coal mine machinery |
-
2013
- 2013-06-30 CN CN201310269711.4A patent/CN103357805B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1239473A (en) * | 1968-07-05 | 1971-07-14 | North American Rockwell | Aluminum alloy workpieces |
| CN2846354Y (en) * | 2005-11-14 | 2006-12-13 | 中煤张家口煤矿机械有限责任公司 | Combined mold forging rail base |
| CN202185551U (en) * | 2011-08-04 | 2012-04-11 | 唐亮 | Finish forging stock die for producing track spikes |
| CN102989957A (en) * | 2012-08-17 | 2013-03-27 | 大连大高阀门股份有限公司 | Forging process for rail chair for coal mine machinery |
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| CN103357805A (en) | 2013-10-23 |
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