CN119159023B - A precision forging method and forging die for a large high-temperature alloy rotor adapter shaft - Google Patents
A precision forging method and forging die for a large high-temperature alloy rotor adapter shaftInfo
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- CN119159023B CN119159023B CN202411416171.2A CN202411416171A CN119159023B CN 119159023 B CN119159023 B CN 119159023B CN 202411416171 A CN202411416171 A CN 202411416171A CN 119159023 B CN119159023 B CN 119159023B
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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
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/022—Open die forging
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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
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
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- 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
- B21K1/06—Making machine elements axles or shafts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
本发明公开了一种大型高温合金转子适配轴精密锻造方法及锻造模具，属于高端装备制造技术领域，锻造方法包括加工圆柱形坯料；将坯料加热至锻造温度；将坯料放置在下模具型腔中，然后控制上模具与下模具合模；控制左、右水平冲头分别运动，成形坯料内孔腔；控制左、右水平冲头回复到初始位置；控制左水平模具和右水平模具分别运动，完成对预制坯料的镦粗；对锻件的内孔腔整型；最后，获得所需要的转子适配轴；锻造模具包括上模具、下模具、左水平模具、右水平模具、左水平冲头和右水平冲头。本发明能够满足先进重型燃气轮机对产品质量、制造成本等方面的迫切需求，具有较大的经济与社会效益。
The present invention discloses a precision forging method and forging die for a large high-temperature alloy rotor adapter shaft, belonging to the field of high-end equipment manufacturing technology. The forging method comprises processing a cylindrical blank; heating the blank to a forging temperature; placing the blank in a lower die cavity, then controlling the upper and lower dies to close; controlling the left and right horizontal punches to move separately to form the inner cavity of the blank; controlling the left and right horizontal punches to return to their initial positions; controlling the left and right horizontal dies to move separately to complete upsetting of the prefabricated blank; shaping the inner cavity of the forging; and finally, obtaining the desired rotor adapter shaft. The forging die comprises an upper die, a lower die, a left horizontal die, a right horizontal die, a left horizontal punch, and a right horizontal punch. The present invention can meet the urgent demands of advanced heavy-duty gas turbines for product quality and manufacturing cost, and has significant economic and social benefits.
Description
Technical Field
The invention belongs to the field of manufacturing of high-end equipment, in particular to the technical field of forging and pressing, and particularly relates to a precision forging method and a forging die for a large-sized superalloy rotor adapter shaft.
Background
The rotor adapting shaft is one of the most important bearing components in the heavy-duty gas turbine, and is characterized by being an axisymmetric revolving body, comprising a cylindrical main body with a through hole, wherein two ends of the cylindrical main body are respectively provided with a flange, the flanges are mainly used for connecting a rotating shaft, high temperature, high pressure and transmission torque are required to be born for a long time, service working conditions are extremely bad, and the requirements on the performances of high-temperature stretching, high-temperature durability, high-temperature creep, high-cycle fatigue and the like of the rotor adapting shaft are high. Therefore, the rotor adapter shaft part not only adopts expensive high-temperature alloy materials, but also has higher requirements on the manufacturing process of the rotor adapter shaft part.
The rotor adaptation shaft forging for the heavy-duty gas turbine generally weighs more than 1 ton, a traditional common die forging process is adopted, and a process residual block is required to be designed between two flanges due to the need of die stripping, so that great waste of expensive metal materials is caused, the production cost is high, and a streamline at the cylindrical main body of the rotor adaptation shaft forging is cut off and exposed, so that comprehensive mechanical properties such as service fatigue of parts are affected.
The multi-directional die forging technology is an important means for manufacturing hollow special-shaped parts at present. However, the multi-directional die forging is extremely challenging for large-sized high-temperature alloy rotor adapter shaft forgings, the deformation resistance of the high-temperature alloy materials is extremely high, the conventional multi-directional die forging technology is adopted, the horizontal forging load exceeds 2 ten thousand tons, the conventional equipment capacity cannot provide such high forging capacity, the high-temperature alloy material deformation process window is narrow, if the forging deformation amount is less than 30% at any firing time, the risk of unqualified tissue performance of the forgings is increased sharply, and scrapping is caused, so that the rotor adapter shaft forging forming cannot be realized through multi-firing multi-directional die forging.
Therefore, how to reduce the forging forming load and thereby realize precision forging of the high-temperature alloy rotor adapter shaft has become a technical problem which the person skilled in the art continuously solves.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to solve the problems of large material consumption, incomplete streamline and the like in the traditional production process, provides a precision forging method and a forging die for a large-sized high-temperature alloy rotor adaptive shaft, can meet urgent requirements of an advanced heavy-duty gas turbine on the aspects of product quality, manufacturing cost and the like, and has great economic and social benefits.
In order to solve the technical problems, the technical scheme adopted by the invention is that the precision forging method for the large-scale high-temperature alloy rotor adapter shaft is characterized by comprising the following steps of:
Step one, processing a cylindrical blank according to the outline dimension of a forging;
Heating the blank to forging temperature, taking out the blank, covering the surface of the blank with glass powder adhesive, coating the blank with heat preservation cotton, and heating and preserving the blank for a certain time again;
Placing the heated blank in a cavity of a lower die, controlling the upper die to move downwards, and continuously moving downwards after contacting the blank until the upper die and the lower die are closed, and completing the pressing action;
The upper die keeps a pressing state, then, the left horizontal punch is controlled to move rightwards to contact the blank, and simultaneously, the right horizontal punch is controlled to move leftwards to contact the blank;
controlling the left horizontal punch and the right horizontal punch to do return movement respectively until the left horizontal punch and the right horizontal punch return to the initial positions, and completing the preparation of the prefabricated blank with the inner cavity;
Controlling the left horizontal die to move rightwards until the left horizontal die contacts the prefabricated blank, simultaneously controlling the right horizontal die to move leftwards until the right horizontal die contacts the prefabricated blank, and then simultaneously controlling the left horizontal die and the right horizontal die to respectively move to a designated target position to finish upsetting of the prefabricated blank;
Controlling the left horizontal die and the right horizontal die to do return movement respectively until reaching a designated position, stopping, then controlling the left horizontal punch to move rightwards and enter the inner hole cavity of the blank again, and simultaneously controlling the right horizontal punch to move leftwards and enter the inner hole cavity of the blank until the left horizontal punch and the right horizontal punch respectively move to designated target positions, and finishing shaping the inner hole cavity of the forging piece;
And step eight, finally, controlling the left horizontal punch, the right horizontal punch, the left horizontal die, the right horizontal die and the upper die to return to the initial positions, and obtaining the required rotor adapter shaft.
Further, the diameter of the cylindrical blank is smaller than the largest diameter of an inner hole formed after the upper die and the lower die are assembled by 0.1-5mm.
Further, the thickness of the heat preservation cotton covered on the surface of the cylindrical blank is 5-10 mm.
In the fourth step, after the left horizontal punch and the right horizontal punch move to the appointed target position, the distance between the left horizontal punch and the right horizontal punch is 40-60mm, so that the thickness of the connecting skin between the inner hole cavity on the left side of the blank and the inner hole cavity on the right side is 40-60 mm.
Further, in the fourth step, the forging load of the blank is 2900 tons.
Further, in step six, the upset forging load is 5000 tons.
Further, in the seventh step, the forging load of the inner cavity integer is 800 tons.
A large-sized high-temperature alloy rotor adaptive shaft precision forging die is characterized by comprising an upper die, a lower die, a left horizontal die, a right horizontal die, a left horizontal punch and a right horizontal punch, wherein the shape of an inner hole formed by the upper die and the lower die after being matched with the shape of the side face of a rotor adaptive shaft to be processed is matched, the left horizontal die and the right horizontal die are respectively arranged at two ends of the lower die, the axial lines of the left horizontal die and the right horizontal die are coincident with the axial lines of the inner hole formed by the upper die and the lower die after being matched, the inner holes formed by the upper die and the lower die after being matched can slide, through holes are formed on the left horizontal die and the right horizontal die along the axial lines of the left horizontal die respectively, and the stamping ends of the left horizontal punch and the right horizontal punch penetrate into the lower die respectively and are connected with the left horizontal die and the right horizontal die in a sliding fit mode.
Further, the end faces of one ends of the left horizontal die and the right horizontal die, which extend into the lower die, are stepped faces, wherein an inner ring face, which is close to the inner side, of the end faces of the left horizontal die and the right horizontal die protrudes out of an outer ring face, which is close to the outer side, the thickness of the protruding portion is 10-20mm, the area of the inner ring face is 0.8-1.2 times that of the outer ring face, and the joint of the inner ring face and the outer ring face is in rounded transition.
Compared with the prior art, the invention has the following advantages:
1) The traditional large contact area extrusion deformation in the horizontal direction of the multi-directional die forging is converted into extrusion punching, ring upsetting and punching shaping with small contact area by adopting a multi-time partition local loading method, and the forming load of the large-sized high-temperature alloy rotor adapter shaft forging piece during the multi-directional die forging can be greatly reduced by more than 60%.
2) The invention adopts one-fire precision forging forming, avoids the problem that the streamline at the cylindrical main body of the rotor adapting shaft die forging is cut off, and has the maximum forming load of 6000 tons, the forging fire is reduced by 75 percent, the forming load is reduced by 87.5 percent, the material consumption can be reduced by more than 30 percent, and the machining process can be reduced by more than 20 percent, wherein, the material cost can be saved by 14.1 ten thousand yuan only by one piece, and the invention has remarkable economic benefit.
3) The rotor adapter shaft can realize complete forming of the integral characteristic structure of the rotor adapter shaft, auxiliary characteristics such as process residual blocks and flash edges are not required to be added, metal full-flow line forging forming is realized, comprehensive mechanical properties of products are improved, product quality is guaranteed, production efficiency is high, and service requirements of advanced heavy equipment on safety and reliability of key parts are facilitated.
Drawings
FIG. 1 is a forging flow chart for processing a rotor adapter shaft forging in accordance with the present invention.
FIG. 2 is a schematic structural view of a forging die according to the present invention.
Fig. 3 is a schematic structural diagram of a rotor adapter shaft forging for a heavy duty gas turbine according to an embodiment of the present invention.
In the figure, 1-cylindrical blank, 2-lower die, 3-upper die, 4-left horizontal punch, 5-right horizontal punch, 6-left horizontal die and 7-right horizontal die.
Detailed Description
The invention will be further described with reference to the drawings and examples.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined. In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Embodiment referring to fig. 1, a precision forging method for a large-sized superalloy rotor adapter shaft comprises the following steps:
The method comprises the steps of machining a cylindrical blank 1 according to the outline dimension of a forging piece (a rotor adapting shaft to be machined), and selecting or machining a corresponding combined die according to the forging piece dimension.
And secondly, heating the blank to a forging temperature, taking out the blank, covering the surface of the blank with a glass powder adhesive, covering the blank with heat preservation cotton, and heating and preserving heat for a certain time, wherein the thickness of the heat preservation cotton covered on the surface of the cylindrical blank 1 is 5-10 mm, so that the heat preservation effect is improved.
And thirdly, placing the heated blank in a cavity of the lower die 2, controlling the upper die 3 to move downwards, and continuously moving downwards after contacting the blank until the upper die and the lower die are closed, and finishing the pressing action. The diameter of the cylindrical blank 1 is smaller than the largest diameter of an inner hole formed after the upper die 3 and the lower die 2 are clamped by 0.1-5mm, so that the diameter of the cylindrical blank 1 is slightly smaller than the diameter of a cylindrical main body of the sleeve forging piece, when the upper die and the lower die are clamped by each other to extrude the cylindrical blank 1, flash is not formed at a die opening of the combined die, and therefore machining procedures are effectively reduced, machining quality is guaranteed, and machining efficiency is improved.
And fourthly, the upper die 3 keeps a pressing state, then the left horizontal punch 4 and the right horizontal punch 5 are added to act, the left horizontal punch 4 is controlled to move rightwards to contact the blank, the right horizontal punch 5 is controlled to move leftwards to contact the blank, and the left horizontal punch 5 and the right horizontal punch 5 are controlled to move to the appointed target positions respectively at the same time to form the cavity in the blank. The thickness of the formed connecting skin can be accurately controlled by controlling the stroke of the horizontal punch, and secondary processing is avoided, so that the processing precision and efficiency of the whole forging piece can be improved. Wherein the forging load of the blank is 2900 tons. As one implementation mode, after the left horizontal punch 5 and the right horizontal punch 5 move to the appointed target position, the distance between the left horizontal punch 5 and the right horizontal punch 5 is 40-60mm, so that the thickness of the connecting skin between the inner hole cavity on the left side of the blank and the inner hole cavity on the right side is 40-60 mm.
And fifthly, controlling the left horizontal punch 5 and the right horizontal punch 5 to do return movement respectively until the initial position is restored, and finishing the preparation of the prefabricated blank with the inner cavity.
Step six, the left horizontal die 6 and the right horizontal die 7 are added to act, the left horizontal die 6 is controlled to move rightwards to be in contact with the prefabricated blank, meanwhile, the right horizontal die 7 is controlled to move leftwards to be in contact with the prefabricated blank, and then the left horizontal die 6 and the right horizontal die 7 are controlled to move to designated target positions respectively, so that upsetting of the prefabricated blank is completed. Wherein the upset forging load is 5000 tons.
And seventhly, controlling the left horizontal die 6 and the right horizontal die 7 to do return movement respectively until reaching a designated position, stopping, then adding the left horizontal punch 4 and the right horizontal punch 5 into the blank inner cavity again, controlling the left horizontal punch 4 to move rightwards and enter the blank inner cavity, and simultaneously controlling the right horizontal punch 5 to move leftwards and enter the blank inner cavity until the left horizontal punch 5 and the right horizontal punch 5 respectively move to the designated target position, and finishing shaping the inner cavity of the forge piece, wherein the shaping forging load of the inner cavity is 800 tons. And meanwhile, the integral deformation of the integer inner hole cavity is very small, and the deformation is mainly concentrated in the inner hole of the forging piece, so the deformation of the end face of the forging piece is negligible.
And step eight, finally, controlling the left horizontal punch 4, the right horizontal punch 5, the left horizontal die 6, the right horizontal die 7 and the upper die 3 to return to the initial positions, and obtaining the required rotor adapter shaft.
Referring to fig. 2, the invention also discloses a large-scale superalloy rotor adapter shaft precision forging die, which comprises an upper die 3, a lower die 2, a left horizontal die 6, a right horizontal die 7, a left horizontal punch 4 and a right horizontal punch 5. The shape of an inner hole formed after the upper die 3 and the lower die 2 are matched with the shape of the side face of the rotor adapting shaft to be processed, and the inner hole formed after the die is matched is a horizontal hole. The left horizontal die 6 and the right horizontal die 7 are respectively arranged at two ends of the lower die 2, the axial leads of the left horizontal die and the right horizontal die are overlapped with the axial leads of the inner holes formed after the upper die 3 and the lower die 2 are matched, and the inner holes formed after the upper die 3 and the lower die 2 are matched can slide. Through holes are respectively formed in the left horizontal die 6 and the right horizontal die 7 along the axial lines of the left horizontal die 6 and the right horizontal die 7, and punching ends of the left horizontal punching head 4 and the right horizontal punching head 5 respectively penetrate through the left horizontal die 6 and the right horizontal die 7, extend into the lower die 2 and are respectively connected with the left horizontal die 6 and the right horizontal die 7 in a sliding fit mode. The diameter of the horizontal punch is consistent with the diameter of the inner hole cavity of the rotor adaptation shaft forging piece, the inner diameter of the horizontal die is 5-10 mm larger than the diameter of the horizontal punch, and the outer diameter of the horizontal die is 20-30 mm smaller than the outer diameter of the rotor adaptation shaft forging piece flange.
During implementation, the end faces of one ends of the left horizontal die 6 and the right horizontal die 7, which extend into the lower die 2, are stepped faces, wherein inner ring faces, close to the inner sides, of the end faces of the left horizontal die 6 and the right horizontal die 7 are protruded out of outer ring faces, close to the outer sides, the thickness of the protruded portions is 10-20 mm, the area of the inner ring faces is 0.8-1.2 times that of the outer ring faces, and the connection positions of the inner ring faces and the outer ring faces are in rounded transition. In this way, by forming the drop at the forging end faces of the left horizontal die 6 and the right horizontal die 7, when the ring upsetting is deformed, there is a time difference in contact between the horizontal die and the billet, the inner ring face is first in contact with the outer ring face, and as the deformation proceeds, the outer ring face is in contact with the billet again, so that the deformation load increasing speed of the ring upsetting can be effectively slowed down, and the horizontal forging forming load can be further reduced. In order to improve the stability, the service life and the cost of the whole forging die, the horizontal punch and the horizontal die are made of different materials, preferably, the horizontal punch is made of a high-temperature alloy material with excellent high-temperature performance, such as GH4169, and the horizontal die is made of a common die steel material, such as 5 CrMnMo.
During forging, the billet is placed horizontally in the lower die 2 body, and the upper die 3 driven by a hydraulic cylinder is used to apply a force to the top of the billet. The left horizontal die 6, the right horizontal die 7, the left horizontal punch 4 and the right horizontal punch 5 are driven by hydraulic cylinders respectively, the ends of the left horizontal punch 4 and the left horizontal die 6 can respectively extend into the left side opening of the die body and are used for applying force to the left side of the blank, and the ends of the right horizontal punch 5 and the right horizontal die 7 can respectively extend into the right side opening of the die body and are used for applying force to the right side of the blank.
According to the scheme, a multi-partition local loading method is adopted, the traditional large contact area extrusion deformation in the horizontal direction of the multi-directional die forging is converted into extrusion punching, ring upsetting and punching shaping with small contact area, and the forming load of the large-sized high-temperature alloy rotor adaptive shaft forging during the multi-directional die forging can be greatly reduced by more than 60%.
Meanwhile, the problem that the streamline at the cylindrical main body of the rotor adapting shaft die forging is cut off is avoided by adopting one-fire precision forging forming, the maximum forming load is only 6000 tons, the forging fire is reduced by 75%, the forming load is reduced by 87.5%, the material consumption can be reduced by more than 30%, and the machining process can be reduced by more than 20%, wherein only the material cost can be saved by 14.1 ten thousand yuan for one piece, and the method has remarkable economic benefit. And finally, the integral characteristic structure of the rotor adapter shaft can be completely formed without adding auxiliary characteristics such as process residual blocks, flash edges and the like, the metal full-flow line forging forming is realized, the comprehensive mechanical property of the product is improved, the product quality is ensured, the production efficiency is high, and the service requirements of advanced heavy equipment on the safety and reliability of key parts are facilitated.
Referring to fig. 3, the manufacturing method of the present invention will be described in detail below by taking a rotor adapter shaft forging for a heavy duty gas turbine as an example. The outer contour dimension of the forging piece is 646 (outer diameter) ×250 (inner diameter) ×475 (height) mm, the widths of the left flange and the right flange are 116mm, the outer diameter of the cylindrical main body of the forging piece is 496mm, the weight of the forging piece is 905kg, and the specific manufacturing steps are as follows:
Step one, designing a die assembly and a cylindrical blank according to the outline dimension of the forging piece. The horizontal punch is 250mm in diameter and has a draft angle of 1 DEG, the outer diameter of the horizontal die is 620mm, the inner diameter of the horizontal die is 255m, the contact end (forging end) of the horizontal die and the blank is a stepped surface, the step height (height difference) of the stepped surface is 15mm, the R10mm round corner transition is formed at the step transition position, and the external dimension of the blank is 490mm in diameter and 610mm in length.
Heating the blank to the forging temperature of 1010 ℃, taking out the blank, covering the surface of the blank with glass powder adhesive, coating the blank with heat preservation cotton with the thickness of 10mm, returning the blank to the furnace, heating and preserving heat for 90min, and then placing the heated blank in a lower die cavity.
And thirdly, the upper die moves downwards to contact with the blank to finish the pressing action, wherein the step is similar to the conventional die forging deformation process, but the diameter of the cylindrical blank is smaller than that of the cylindrical main body of the sleeve forging by 0-5 mm, so that flash cannot be formed at the horizontal die opening after the upper die and the lower die are clamped.
And fourthly, the upper die keeps (in a downward pressing state) pressure and stops, the left horizontal punch and the right horizontal punch are added to act, the left horizontal punch moves rightwards to contact the blank, meanwhile, the right horizontal punch moves leftwards to contact the blank, the left horizontal punch and the right horizontal punch respectively move 270mm to the target positions, and extrusion punching is carried out on the blank.
And fifthly, carrying out return movement on the left horizontal punch and the right horizontal punch respectively, stopping moving after reaching a designated position, and completing preparation of the prefabricated part with the thickness of the continuous sheet being 60 mm.
And step six, adding the left horizontal die and the right horizontal die, enabling the left horizontal die to move rightwards to contact the prefabricated part, enabling the right horizontal die to move leftwards to contact the prefabricated part, enabling the left horizontal die and the right horizontal die to respectively move 107mm to the target positions, and completing ring upsetting of the prefabricated part to obtain the prefabricated part.
And seventhly, respectively carrying out return movement on the left horizontal die and the right horizontal die, stopping moving after reaching a designated position, adding the left horizontal punch and the right horizontal punch, enabling the left horizontal punch to move rightwards to contact with the inner hole cavity of the prefabricated member, enabling the right horizontal punch to move leftwards to contact with the inner hole cavity of the prefabricated member, enabling the left horizontal punch and the right horizontal punch to move 270mm to a target position respectively, and shaping the inner hole of the prefabricated member.
And step eight, finally, controlling the left horizontal punch, the right horizontal punch, the left horizontal die, the right horizontal die and the upper die to return to the initial positions, and obtaining the required accurate rotor adaptation shaft forging.
If the weight of the forging piece is 1255Kg and the feeding weight is 1380Kg according to the traditional die forging mode, 2 times of blank making, 1 time of pre-forging, 1 time of final forging and the flash removal after die forging are needed. By adopting the technology of the invention, the weight of the forging piece can be reduced from 1255Kg to 905Kg, the reduction width is 27.9%, the feeding weight is reduced from 1380Kg to 910Kg, the reduction width is 34.1%, the forging heat is reduced from 4 heat to 1 heat, the reduction width is 75%, burrs are only needed to be polished after die forging, flash is not needed to be removed, the cost of a single piece of material can be saved by 14.1 ten thousand yuan, the cost of 705 ten thousand yuan can be saved each year according to the requirement of 50 fuel machines each year, and the economic benefit is great. From the data, compared with the prior art, the scheme has the advantages of remarkable improvement, and better processing precision, processing efficiency and cost control.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the technical solution, and those skilled in the art should understand that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the present invention, and all such modifications and equivalents are included in the scope of the claims.
Claims (8)
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| CN202411416171.2A CN119159023B (en) | 2024-10-11 | 2024-10-11 | A precision forging method and forging die for a large high-temperature alloy rotor adapter shaft |
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| CN103706744A (en) * | 2013-12-31 | 2014-04-09 | 海隆石油钻具（无锡）有限公司 | Petroleum drill rod joint horizontal die forging technology and die forging device |
| CN110170609B (en) * | 2019-06-10 | 2021-01-22 | 郑州机械研究所有限公司 | Precision plastic forming process and mould for ball cage cover with flange |
| JP7695747B2 (en) * | 2022-01-20 | 2025-06-19 | 中聚信海洋工程装備有限公司 | Two-heat forming forging process for large crank throws |
| CN118492252B (en) * | 2024-07-17 | 2024-12-20 | 中国二十二冶集团有限公司 | Multidirectional die forging die and forming method for bidirectional flanged hollow rotary forging |
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| CN106077389A (en) * | 2016-06-17 | 2016-11-09 | 二十二冶集团精密锻造有限公司 | The multidirectional precision die forging process of valve with flange |
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| CN119159023A (en) | 2024-12-20 |
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