CN113020508A - Steel rail heel end profiling and upsetting double-moving-platform machining method based on two-station press - Google Patents
Steel rail heel end profiling and upsetting double-moving-platform machining method based on two-station press Download PDFInfo
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- CN113020508A CN113020508A CN202110217459.7A CN202110217459A CN113020508A CN 113020508 A CN113020508 A CN 113020508A CN 202110217459 A CN202110217459 A CN 202110217459A CN 113020508 A CN113020508 A CN 113020508A
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- steel rail
- upsetting
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- heel end
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
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Abstract
The method is characterized in that a moving platform II is added in the existing press machine two-station heel end profiling production line, and the original moving platform I is still used for daily production of the steel rail heel end; the newly-added moving platform II is used for steel rail upsetting operation, and steel rail heel end profiling and upsetting processing production of one two-station press machine is realized. In the invention, in the mode of adding the moving platform in the existing 5000-ton press machine two-station heel-end pressing production line, the original moving platform still carries out steel rail heel-end production, and the added moving platform is used for the thick pier operation; the steel rail piece heel forging device is reasonable in structure, simple, practical, strong in universality, convenient to install and maintain, suitable for a steel rail piece fork finish forging process production line and widely applicable to the field of steel rail piece heel forging.
Description
Technical Field
The invention belongs to the technical field of steel rail heel end production, and particularly relates to a steel rail heel end profiling and upsetting double-moving-platform processing method based on a two-station press.
Background
The steel rail upsetting process is applied to the steel rail profiling process for many years, a sectional heating and sectional upsetting mode is adopted for a long time, the heating and upsetting length of each section is generally 120mm, and the upsetting process of forging and pressing the heel end of the steel rail within the length range of 1000mm is realized by heating and upsetting for many times.
In recent years, a novel process mode capable of realizing the integral upsetting of the 1000mm range of the heel end of the steel rail appears, the process is simple and convenient to operate, the operation process is more reliable, and the efficiency is higher. In each turnout manufacturing unit, the application of a new upsetting process, particularly the application process of a 5000-ton press with two-station heel-end press is carried out by adopting two presses, one press normally carries out the daily production operation of heel-end forging, and the other press is used for supplementing process equipment for extremely using operation upsetting types.
At present, a press machine of Nanjing company of Mirabao bridge is mainly used for realizing the process production of steel rail rough piers; the press machine of the medium-iron Baoqiao Baoji company is mainly used for the daily heel end production operation of the steel rail; the logistics transportation cost of the steel rail raw material for steel rail profiling production from Nanjing and Baoji is more than 100 ten thousand yuan. Meanwhile, the heel-end test production work of the India project is time-critical, so that the completion of the promotion of the project is limited, and the delivery date is influenced. In view of this, the following improvement is proposed.
Disclosure of Invention
The technical problems solved by the invention are as follows: the method is characterized in that a method for machining a steel rail heel end profiling and upsetting double moving platform based on a two-station press is provided, in the mode of additionally moving the platform in the existing 5000-ton press two-station heel end profiling production line, the original platform is still used for steel rail heel end production, the newly-added moving platform is used for upsetting operation, the steel rail heel end production localization of Nanjing companies is realized, the logistics transportation cost of steel transportation in two places is saved, the production efficiency is improved, and the double moving platform is applied once and for all.
The technical scheme adopted by the invention is as follows: a steel rail heel end profiling and upsetting double-moving-platform processing method based on a two-station press is characterized by comprising the following steps of: a moving platform II is added in a two-station heel end profiling production line of the existing press, and the original moving platform I is still used for daily production of the steel rail heel end; the newly-added moving platform II is used for steel rail upsetting operation, and steel rail heel end profiling and upsetting processing production of one two-station press machine is realized.
In the above technical solution, further: the press is a 5000 ton press.
In the above technical solution, further: the two-station press used for the steel rail heel profiling and upsetting processing production of the two-station press comprises a steel rail heel profiling production control module and an upsetting production control module.
In the above technical solution, further: the moving platform I is provided with a heel end profiling die tool; and the moving platform II is provided with a thick pier die tool.
Compared with the prior art, the invention has the advantages that:
1. the method can realize the synchronous application of the integral upsetting of the steel rail and the conventional two-station heel-end profiling operation, and particularly in the future Indian heel-end projects, rail parts do not need to be transported back and forth in the two places of Bao chicken and Nanjing, so that a great deal of logistics cost is saved; the test and production work organization and urgency of the heel end of the India project are greatly relieved, and the promotion and completion of the project are greatly facilitated; the method thoroughly solves the practical production and management of similar projects of companies in future, has the effect of double-station moving once and for all, and continuously exerts the effect.
2. The synchronous application of the double-moving-platform upsetting process and the conventional two-station heel-end profiling process can greatly reduce the difficulty in developing the heel-end profiling process caused by local deficiency of the section metal of the raw material in the conventional heel end, and has important significance for perfecting the technical measures of the heel-end profiling process and improving the product quality; in products of companies for many years, particularly Thailand turnouts 54E1A1-54E1, Mongolian and hong Kong turnouts 60E1A4-60E1 steel rail raw material railhead metal is insufficient, so that the lower jaw of a heel end forging and pressing section railhead is long and short of meat, the process cannot be solved all the time, after the integral upsetting process is applied, the metal amount of the raw material railhead can be effectively increased, and the forging and pressing quality of similar heel end railheads is ensured to meet the standard requirement.
3. Compared with the current upsetting process of other units in the industry, the synchronous application scheme of the double-moving-station upsetting process and the existing two-station heel-end pressing process can reduce the equipment fixed asset investment of about 1000 ten thousand yuan for 1 press, one set of feeding system and 1 set of heating system, improve the process level of enterprises and have obvious effects of cost reduction and efficiency improvement.
4. The use mode of the structural layout of the double-moving-table press has important reference significance for development and application of four-station heel-end pressing process and technical attack of products with 1050mm sections in the future of companies; not only greatly reduces the investment pressure of enterprises, but also meets the market development in the future; meanwhile, the existing process equipment is upgraded, the urgency of enterprises is relieved, and the method is a major measure for reducing cost and improving efficiency.
5. The application layout of the double-moving-table press machine has wide popularization and application potential in the turnout industry, the mode can greatly reduce the investment of matched fixed assets of the press machine, and experts in the industry have higher positive evaluation on the fixed assets; the method has positive guide demonstration effect at present and in a considerable period in future, and has important significance for improving the application level of industrial equipment and promoting the progress of a turnout processing technology.
6. The steel rail piece heel forging device is reasonable in structure, simple, practical, strong in universality, convenient to install and maintain, suitable for a steel rail piece fork finish forging process production line and widely applicable to the field of steel rail piece heel end forging.
Drawings
FIG. 1 is a schematic diagram of a double-stage arrangement of a pit according to the present invention.
FIG. 2 is a schematic view of the profiling production of the heel end of the steel rail of the present invention.
FIG. 3 is a schematic diagram of the production of the steel rail pier of the present invention.
Detailed Description
Specific embodiments of the present invention are described below with reference to fig. 1-3.
The following examples are given to facilitate a better understanding of the invention, but do not limit the invention. The following examples are only a part of the present invention, and not all of them. The components and materials used in the following examples are commercially available unless otherwise specified.
It is to be understood that the terms "i", "ii", and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the components so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the invention herein.
A steel rail heel end profiling and upsetting double-moving-platform processing method based on a two-station press is characterized by comprising the following steps of: a moving platform II 3 is added in a two-station heel-end profiling production line of the existing press machine 1, and the original moving platform I2 is still used for daily production of the steel rail heel end; the newly-added moving platform II 3 is used for steel rail upsetting operation, and steel rail heel end profiling and upsetting processing production of one two-station press machine is realized.
In the above embodiment, further: the press 1 is a 5000 ton press.
In the above embodiment, further: the two-station press 1 used for the steel rail heel profiling and upsetting processing production of the press 1 comprises a steel rail heel profiling production control module and an upsetting production control module.
In the above embodiment, further: the moving platform I2 is provided with a heel end profiling die tool 201; and the moving platform II 3 is provided with a thick pier die tool 301.
It should be noted that: the existing platform moving foundation is extended to be flush with the wall, the movable length between the upright post of the press machine and the wall reaches 8485mm, the maximum outer contour length distance of a single platform moving structure is 2900mm, and the extended platform moving pit realizes the double-platform moving and hoisting operation.
In the daily production process, the pier-upsetting moving platform II is placed close to the wall, and the original press moves I forging and pressing operations of the platform and changes of the daily die and end-following pressing die tooling 201 and only needs to move out to the existing position, namely, the position 4300mm away from the center of the press, and only the die and a necessary die carrier need to be changed to lift the crane.
When the upsetting operation is needed, the upsetting moving platform is lifted out, the original press moving platform is moved out to the boundary of the wall body, the upsetting moving platform II is placed in, and the upsetting die tooling 301 is installed on the upsetting moving platform II, so that the whole upsetting test and the daily production work of the steel rail forging and pressing section can be performed.
The mechanical structure, power and the like of the newly added moving platform relate to the same design of the existing moving platform.
A matched feeding system and a press machine system need a new upsetting production control module on the basis of the original functions, and the upsetting production control module integrates the control actions of rail piece heating, positioning, mold entering, mold stripping, overturning, blanking, press machine stroke, pressure and the like involved in the integral steel rail upsetting operation.
The dead weights of the pier increasing die tooling 301 and the newly added moving platform II exceed 10 tons, and in order to facilitate hoisting of the pier increasing die tooling 301 and the newly added moving platform II in future, the existing crown block in a workshop profiling process needs to be additionally modified.
From the above description it can be found that: the method can realize the synchronous application of the integral upsetting of the steel rail and the conventional two-station heel-end profiling operation, and particularly in the future Indian heel-end projects, rail parts do not need to be transported back and forth in the two places of Bao chicken and Nanjing, so that a great deal of logistics cost is saved; the test and production work organization and urgency of the heel end of the India project are greatly relieved, and the promotion and completion of the project are greatly facilitated; the method thoroughly solves the practical production and management of similar projects of companies in future, has the effect of double-station moving once and for all, and continuously exerts the effect.
The synchronous application of the double-moving-platform upsetting process and the conventional two-station heel-end profiling process can greatly reduce the difficulty in developing the heel-end profiling process caused by local deficiency of the section metal of the raw material in the conventional heel end, and has important significance for perfecting the technical measures of the heel-end profiling process and improving the product quality; in products of companies for many years, particularly Thailand turnouts 54E1A1-54E1, Mongolian and hong Kong turnouts 60E1A4-60E1 steel rail raw material railhead metal is insufficient, so that the lower jaw of a heel end forging and pressing section railhead is long and short of meat, the process cannot be solved all the time, after the integral upsetting process is applied, the metal amount of the raw material railhead can be effectively increased, and the forging and pressing quality of similar heel end railheads is ensured to meet the standard requirement.
Compared with the current upsetting process of other units in the industry, the synchronous application scheme of the double-moving-station upsetting process and the existing two-station heel-end pressing process can reduce the equipment fixed asset investment of about 1000 ten thousand yuan for 1 press, one set of feeding system and 1 set of heating system, improve the process level of enterprises and have obvious effects of cost reduction and efficiency improvement.
The use mode of the structural layout of the double-moving-table press has important reference significance for development and application of four-station heel-end pressing process and technical attack of products with 1050mm sections in the future of companies; not only greatly reduces the investment pressure of enterprises, but also meets the market development in the future; meanwhile, the existing process equipment is upgraded, the urgency of enterprises is relieved, and the method is a major measure for reducing cost and improving efficiency.
The application layout of the double-moving-table press machine has wide popularization and application potential in the turnout industry, the mode can greatly reduce the investment of matched fixed assets of the press machine, and experts in the industry have higher positive evaluation on the fixed assets; the method has positive guide demonstration effect at present and in a considerable period in future, and has important significance for improving the application level of industrial equipment and promoting the progress of a turnout processing technology.
In conclusion, the steel rail piece heel forging device is reasonable in structure, simple, practical, strong in universality, convenient to install and maintain, suitable for a steel rail piece fork finish forging process production line and widely applicable to the field of steel rail piece heel forging.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description is described in terms of one embodiment, this embodiment does not include only a single embodiment, but such description is merely for clarity, and those skilled in the art will recognize that the embodiments described in this embodiment can be combined as appropriate to form other embodiments as would be understood by those skilled in the art.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and therefore, all equivalent changes made by the contents of the claims of the present invention should be included in the claims of the present invention.
Claims (4)
1. A steel rail heel end profiling and upsetting double-moving-platform processing method based on a two-station press is characterized by comprising the following steps of: a moving platform II (3) is added in a two-station heel end profiling production line of the existing press machine (1), and the original moving platform I (2) is still used for daily production of the steel rail heel end; the newly-added moving platform II (3) is used for steel rail upsetting operation, and the steel rail heel end profiling and upsetting processing production of the two-station press (1) is realized.
2. The two-station press-based steel rail heel end profiling and upsetting double-moving-platform processing method as claimed in claim 1, wherein the two-station press-based steel rail heel end profiling and upsetting double-moving-platform processing method comprises the following steps: the press machine (1) is a 5000-ton press machine.
3. The two-station press-based steel rail heel end profiling and upsetting double-moving-platform processing method as claimed in claim 1, wherein the two-station press-based steel rail heel end profiling and upsetting double-moving-platform processing method comprises the following steps: the two-station press (1) used for the steel rail heel profiling and upsetting processing production of the press (1) comprises a steel rail heel profiling production control module and an upsetting production control module.
4. The two-station press-based steel rail heel end profiling and upsetting double-moving-platform processing method as claimed in claim 1, wherein the two-station press-based steel rail heel end profiling and upsetting double-moving-platform processing method comprises the following steps: the moving platform I (2) is provided with a heel end profiling mold tool (201); and the moving platform II (3) is provided with a thick pier die tool (301).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110217459.7A CN113020508A (en) | 2021-02-26 | 2021-02-26 | Steel rail heel end profiling and upsetting double-moving-platform machining method based on two-station press |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110217459.7A CN113020508A (en) | 2021-02-26 | 2021-02-26 | Steel rail heel end profiling and upsetting double-moving-platform machining method based on two-station press |
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| CN113020508A true CN113020508A (en) | 2021-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110217459.7A Pending CN113020508A (en) | 2021-02-26 | 2021-02-26 | Steel rail heel end profiling and upsetting double-moving-platform machining method based on two-station press |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB561900A (en) * | 1942-06-23 | 1944-06-09 | Ti Group Services Ltd | Improvements relating to the upsetting of metal tubes, rods or the like |
| CN1830596A (en) * | 2004-10-29 | 2006-09-13 | 斯奈克玛 | Method for processing metal slug, apparatus and method for implementing the same |
| CN102873245A (en) * | 2012-10-23 | 2013-01-16 | 安徽马钢工程技术有限公司 | Train wheel production comprehensive press and train wheel production method |
| CN104525813A (en) * | 2014-12-16 | 2015-04-22 | 徐州开元世纪重型锻压有限公司 | Double-station pre-pressing forming hydraulic machine |
| CN104942200A (en) * | 2015-05-06 | 2015-09-30 | 上海交通大学 | I-shaped joint rotating die and forming process thereof |
| US20190134698A1 (en) * | 2016-05-05 | 2019-05-09 | Cie Automotive, S.A. | Swaging device and press |
| CN109877266A (en) * | 2019-04-10 | 2019-06-14 | 中铁宝桥集团有限公司 | A kind of asymmetric section steel rail upsetting apparatus |
| CN110102698A (en) * | 2019-06-04 | 2019-08-09 | 莱州市锐泰机械配件有限公司 | A kind of forging line |
| CN209477189U (en) * | 2018-12-11 | 2019-10-11 | 晋西铁路车辆有限责任公司 | A kind of device and horizontal press of jumping-up bar |
-
2021
- 2021-02-26 CN CN202110217459.7A patent/CN113020508A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB561900A (en) * | 1942-06-23 | 1944-06-09 | Ti Group Services Ltd | Improvements relating to the upsetting of metal tubes, rods or the like |
| CN1830596A (en) * | 2004-10-29 | 2006-09-13 | 斯奈克玛 | Method for processing metal slug, apparatus and method for implementing the same |
| CN102873245A (en) * | 2012-10-23 | 2013-01-16 | 安徽马钢工程技术有限公司 | Train wheel production comprehensive press and train wheel production method |
| CN104525813A (en) * | 2014-12-16 | 2015-04-22 | 徐州开元世纪重型锻压有限公司 | Double-station pre-pressing forming hydraulic machine |
| CN104942200A (en) * | 2015-05-06 | 2015-09-30 | 上海交通大学 | I-shaped joint rotating die and forming process thereof |
| US20190134698A1 (en) * | 2016-05-05 | 2019-05-09 | Cie Automotive, S.A. | Swaging device and press |
| CN209477189U (en) * | 2018-12-11 | 2019-10-11 | 晋西铁路车辆有限责任公司 | A kind of device and horizontal press of jumping-up bar |
| CN109877266A (en) * | 2019-04-10 | 2019-06-14 | 中铁宝桥集团有限公司 | A kind of asymmetric section steel rail upsetting apparatus |
| CN110102698A (en) * | 2019-06-04 | 2019-08-09 | 莱州市锐泰机械配件有限公司 | A kind of forging line |
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