CN203817264U - Modified novel steel rail heeling skewing forging die - Google Patents
Modified novel steel rail heeling skewing forging die Download PDFInfo
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- CN203817264U CN203817264U CN201420257452.3U CN201420257452U CN203817264U CN 203817264 U CN203817264 U CN 203817264U CN 201420257452 U CN201420257452 U CN 201420257452U CN 203817264 U CN203817264 U CN 203817264U
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- heeling
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Abstract
The utility model discloses a modified novel steel rail heeling skewing forging die. The die comprises a die forming section, a die transition section and a die guiding section, wherein the die forming section, the die transition section and the die guiding section are connected in sequence. The die is characterized in that the steel rail heeling skewing amount is A DEG, and skewing amount of the die transition section is preset within the range of A+/-1 DEG. According to the utility model, the technical scheme is adopted, so that the heeling skewing deformation is greatly reduced, and the phenomenon that distortion with different degrees happens to a forging heeling forming section within the range of L mm in the steel rail heeling cold skewing process can be eliminated, therefore, the phenomenon that metal is unevenly distributed in rail base milling and cap-shaped processing process can be eliminated.
Description
Technical field
The utility model relates to the design of rail heel end forging mold, especially relates to the forging mold for the heel end skew processing of rail heel end tape skew processing request.
Background technology
In existing rail processing process, rail heel end forges because track switch design needs, and heel end completes after forging, in forging and stamping section certain limit domestic demand, rail profile is carried out to overall skew, to be connected with railway main track between switch area.
The forging mold of original straight heel end forging mold and skew heel end, all adopt the die design method of same straight transitions, the method is that mould is divided into profiled section, changeover portion and guide section 3 part-structures by heel end structure, profiled section is the required standard gauge fish tail of product section, guide section is the required AT rail of product fish tail section, changeover portion is in the time of AT rail former material flange of rail plane and standard gauge flange of rail plane parallel, press layout design transition section length, in this length range, realize the straight excessive of two different sections.
Heel end after forging is straight transitions structure, in the time of drawing requirement skew, complete and forge normalizing heat treatment and carry out cold conditions torsion after cooling at heel end by drawing, there is the processing problems such as distortional stress is large, skew is inhomogeneous in this skew mode, make a big impact to follow-up forging and stamping section machining, usually occur the processing difficulties of flange of rail rail limb by means of amount milling, the milling of rail head hat amount of metal guarantor working edge.Combined influence has been given prominence to the serious restriction of rail heel end skew mode to track switch production and rail part heel end crudy.
Summary of the invention
In order to overcome in prior art, the web of the rail impression that skew class rail heel end produces in cold conditions skew process after forging, 4 rail limbs of flange of rail milling are in uneven thickness, rail head Milling Process surplus distributes inequality and skew operation to be difficult to the deficiencies such as grasp, the utility model is by by heel end forging mold changeover portion structural design being the transient mode of default constant slope, the convenient and swift heel end skew thermal state forming of realizing accurately, reduce a series of rail processing difficulties that original heel end cold conditions skew brings, improve rail heel end processing method, reduce heel end difficulty of processing, improve heel end crudy.
Rail heel end skew forging mold of the present utility model is the process principle of set original rail heel end hot-forging forming and heel end cold twisting straightening and the novel die method for designing that proposes.
The technical scheme that the technical problem existing in solution prior art adopts is:
A kind of improved Novel steel rail heel end skew forging mold, it comprises mould molding section, die transition section and mould guide section, described mould molding section is connected successively with die transition section and mould guide section, described rail heel end skew amount is A °, A ° of skew amount be according to the model of different rail and difference, the skew amount of default A ± 1 of described die transition section ° scope.
After heel end forges, described rail heel end skew forms the gradient of A ± 0.8 °.Heel end straightening operation is finely tuned correction to the gradient of this rail heel end skew forging mold by A ± 0.5 °.
Adopt the technical solution of the utility model, reduce significantly heel end skew deflection, eliminate in rail heel end cold twisting process, forge heel end profiled section Lmm scope and occur the twisted phenomena that degree is different, distribute uneven phenomenon thereby eliminate the metal existing in flange of rail milling, hat process.
The utility model by the die design method of default A ± 1 of product design requirement °, has design ingenious in die transition section, rational in infrastructure, simple and practical, the features such as highly versatile, are applicable to heel end and forge designing and producing of class mould, can be widely used in rail part heel end and forge field.The technical scheme that the utility model is recorded promotes existing railroad turnout steel rail part heel end process technology level, reaches object stable and that promote track switch product quality, enhance productivity.
In addition, the enforcement of technical solutions of the utility model, has realized the hot skew of forging of heel end, has eliminated heel end cold twisting and has processed existing distortion non-uniform phenomenon, reduce heel end skew difficulty of processing, eliminated the machined difficulty of the follow-up rail heel end forging and stamping section causing because of skew error.
Brief description of the drawings
Fig. 1 is the structure chart of a kind of improved Novel steel rail heel end skew forging mold of the present utility model.
Fig. 2 is the front view of the utility model as an example of the long limb mould of 60AT-60 heel end die mould example.
Fig. 3 is that the A of the utility model as an example of the long limb mould of 60AT-60 heel end die mould example is to view.
Detailed description of the invention
Press 60kg/m standard gauge (60AT-60) heel end die mould (long limb mould) as example, detailed description of the invention of the present utility model to be described further taking 60AT below.
As shown in Figure 1, a kind of improved Novel steel rail heel end skew forging mold is by mould molding section 1, die transition section 2, form mould molding section 1, die transition section 2 with mould guide section 3, once connect to form with mould guide section 3, above-mentioned 3 parts adopt integrally casting moulding.
As shown in Figures 2 and 3, the long limb mould of 60AT-60 heel end die mould, the total length of heel end forging mold is 850 ± 2mm, and the length of mould guide section 3 is 100mm, and the length of the die transition section of heel end forging mold is 150mm.
The tilt quantity of rail 60AT-60 heel end is 1.432 °, after the twisting slope of default 1.432 ± 1 ° of the die transition section 2 of heel end forging mold, reverse in the hot forging that realizes heel end, after being forged, heel end within the scope of changeover portion 150mm, forms taking profiled section 60 standard gauge web of the rail centers as pivot.
The skew that reverses 1.432 ± 0.8 ° to the long limb of 60AT rail is excessive, and ensure the synchronous twisting formation of the profiled section 450mm scope flange of rail, heel end (cold conditions) top subsequently adjusts operation only this gradient to be finely tuned by the requirement of 1.432 ± 0.5 °, stressed and the deformation degree of rail part when significantly reducing heel end and reversing, has fundamentally eliminated heel end and the milling of the heel end flange of rail and hat milling has been caused to processing difficulties because of cold twisting error.
Claims (2)
1. an improved Novel steel rail heel end skew forging mold, it comprises mould molding section, die transition section and mould guide section, described mould molding section is connected successively with die transition section and mould guide section; It is characterized in that: rail heel end skew amount is A ° the skew amount of default A ± 1 of described die transition section ° scope.
2. the improved Novel steel rail heel end of one according to claim 1 skew forging mold, is characterized in that: after heel end forges, described rail heel end skew forms the gradient of A ± 0.8 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420257452.3U CN203817264U (en) | 2014-05-19 | 2014-05-19 | Modified novel steel rail heeling skewing forging die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420257452.3U CN203817264U (en) | 2014-05-19 | 2014-05-19 | Modified novel steel rail heeling skewing forging die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203817264U true CN203817264U (en) | 2014-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420257452.3U Active CN203817264U (en) | 2014-05-19 | 2014-05-19 | Modified novel steel rail heeling skewing forging die |
Country Status (1)
| Country | Link |
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| CN (1) | CN203817264U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104550593A (en) * | 2014-12-31 | 2015-04-29 | 中国铁建重工集团有限公司 | Forging and pressing method of steel rail heel and three-position molding die used thereby |
| CN113953433A (en) * | 2021-10-19 | 2022-01-21 | 中国铁建重工集团股份有限公司道岔分公司 | Universal special-shaped rail forging die and application thereof |
-
2014
- 2014-05-19 CN CN201420257452.3U patent/CN203817264U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104550593A (en) * | 2014-12-31 | 2015-04-29 | 中国铁建重工集团有限公司 | Forging and pressing method of steel rail heel and three-position molding die used thereby |
| CN113953433A (en) * | 2021-10-19 | 2022-01-21 | 中国铁建重工集团股份有限公司道岔分公司 | Universal special-shaped rail forging die and application thereof |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |