CN116423087A - Manufacturing method of impact type rotating wheel with combination of center body forging and composite additive - Google Patents

Manufacturing method of impact type rotating wheel with combination of center body forging and composite additive Download PDF

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Publication number
CN116423087A
CN116423087A CN202310468430.5A CN202310468430A CN116423087A CN 116423087 A CN116423087 A CN 116423087A CN 202310468430 A CN202310468430 A CN 202310468430A CN 116423087 A CN116423087 A CN 116423087A
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China
Prior art keywords
forging
welding
water bucket
center body
body forging
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CN202310468430.5A
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Chinese (zh)
Inventor
金宝
高炼玲
朱强
郭中才
潘少民
范潇
杨王波
陈道全
何自勇
赵军
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Dongfang Electric Machinery Co Ltd DEC
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Dongfang Electric Machinery Co Ltd DEC
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Priority to CN202310468430.5A priority Critical patent/CN116423087A/en
Publication of CN116423087A publication Critical patent/CN116423087A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Abstract

The invention discloses a manufacturing method of an impact type rotating wheel with a center body forging combined with composite additive, which comprises the steps of selecting and processing the center body forging; dividing each external water bucket model into a first welding area and a second welding area according to the welding position of each external water bucket model; respectively welding tail fins on two sides of the center body forging piece, and manufacturing a root water bucket; respectively welding a plurality of preset positions of the circumference of the central body forging at a first processing position before transportation to form a complete external water bucket, and respectively welding first welding areas of the external water bucket at the rest positions of the circumference of the central body forging; and at the second machining position after transportation, performing welding of the second welding area on the first welding area welded at the rest position of the circumference of the center body forging. According to the invention, the integral external water bucket at the corresponding position and different welding areas of the external water bucket at the rest position are respectively arranged before and after transportation, so that the construction period is shortened, the difficulty of the forging of the central body is reduced, the material utilization rate is improved, and the forging cost is reduced.

Description

Manufacturing method of impact type rotating wheel with combination of center body forging and composite additive
Technical Field
The invention relates to the technical field of impact type rotating wheels, in particular to a manufacturing method of an impact type rotating wheel with a center body forging combined with composite additive.
Background
With the development of high-head high-capacity impact turbine units, the size of the core component runner of the impact turbine is larger and larger. The impact type rotating wheel mainly comprises a central body and a water bucket, and for the large-capacity impact type rotating wheel, the central body adopts a forging piece, which is common in the industry. The impact wheel is subjected to the cyclic impact of high-speed water flow during operation, particularly the root of a water bucket, and is subjected to typical fatigue load, and is the area where the water bucket is subjected to the greatest. Because the forging is repeatedly forged during manufacturing, the defects of cast loosening and the like generated in the smelting process of metal are eliminated, and the microstructure is optimized. In order to ensure safe and reliable operation of the rotating wheel, the root of the rotating wheel water bucket also needs to be provided with a forging piece, and the external water bucket can be manufactured in an additive mode, cast or forged according to engineering requirements.
As shown in fig. 1, in the conventional impact type runner manufacturing, the complete impact type runner is obtained by processing and then transported to an installation place for installation, but the whole transportation is difficult due to the limitation of transportation conditions; or the external water bucket of the part processed in the factory is transported to the installation place to process the rest external water bucket, but the process can only be applied to the integral die forging of the external water bucket, and when the external water bucket of the additive manufacturing is faced, the additive manufacturing with large area is carried out at the installation place, so that a large amount of processing time is required. In addition, as shown in fig. 2, the forging processing technology adopted by the central body of the conventional impact type rotating wheel has higher requirement on the thickness of a blank, and the thickness is generally not smaller than the axial thickness of a root bucket high-stress area of the target impact type rotating wheel. Therefore, how to improve the processing and transportation efficiency and reduce the forging difficulty of the forging piece is a technical problem to be solved.
Disclosure of Invention
The invention mainly aims to provide a method for manufacturing an impact type rotating wheel by combining a central body forging piece with a composite additive, and aims to solve the technical problems of long construction period, high forging difficulty and low material utilization rate caused by adopting a mode of integral processing transportation or partial processing transportation and integral forging in the existing method for manufacturing the impact type rotating wheel.
In order to achieve the above purpose, the invention provides a method for manufacturing an impact type runner by combining a central body forging piece with a composite additive, which comprises the following steps:
s1: establishing a water bucket model of the target impact type rotating wheel; wherein the water bucket model comprises a central body model and an external water bucket model;
s2: selecting a basic forging piece according to the center body model and processing the basic forging piece into a center body forging piece;
s3: dividing each external water bucket model into a first welding area and a second welding area according to the welding position of each external water bucket model;
s4: respectively welding tail fins on two sides of the center body forging piece, and manufacturing a root water bucket;
s5: respectively welding a plurality of preset positions of the circumference of the center body forging at a first processing position before transportation to form a complete external water bucket, and respectively welding first welding areas of the external water bucket at the rest positions of the circumference of the center body forging;
s6: and at a second machining position after transportation, performing welding of a second welding area on the first welding area welded at the rest position of the circumference of the central body forging.
Optionally, in step S2, the axial thickness of the base forging is selected to be smaller than the axial thickness of the root bucket high stress area of the target impact runner, and the radial length of the base forging is selected to be the sum of the radial length of the central body of the target impact runner and the radial length of the root bucket high stress area which is oppositely arranged.
Optionally, before the fin is welded on two sides of the center body forging respectively, the method further includes: and for the part of the basic forging, the axial thickness of which is smaller than that of the root water bucket high stress area, adopting laser material increase for welding manufacture to form the complete root water bucket high stress area.
Optionally, the tail fin is a root bucket low stress area of the target impact type runner, and the tail fin and the complete root bucket high stress area jointly form a root bucket.
Optionally, fin welding respectively in center body forging both sides specifically includes: calibrating the positions of the center body forging and the material adding equipment; arc material adding manufacturing is carried out on the tail wing at preset positions on two sides of the center body forging piece by using material adding equipment, and a root water bucket low-stress area is obtained.
Optionally, the first processing position before transportation is in the processing factory, and the plurality of preset positions of the circumference of the center body forging are configured as relative positions of the circumference of the center body forging, so that after the plurality of preset positions are respectively welded with the complete external water bucket and the first welding areas of the external water bucket are respectively welded at the rest positions, an impact type runner intermediate piece with the width smaller than the radial length of the target impact type runner and greater than the length of the meridian of the center body forging and the length equal to the radial length of the center body forging is formed.
Optionally, the second machining position after transportation is an installation place, and the rest position of the circumference of the central body forging piece is configured as a position of a second welding area where the external water bucket is not welded temporarily by the impact type runner intermediate piece, so that the complete impact type runner is formed after the external water bucket is welded at the rest position respectively.
Alternatively, the tangential planes of the first welding area of the external water bucket corresponding to the two sides of the impact type runner intermediate piece are arranged in parallel, and the length between the two parallel planes is the width of the impact type runner intermediate piece.
Optionally, the welding of the first welding area and the second welding area adopts an arc additive manufacturing process.
The embodiment of the invention provides a manufacturing method of an impact type rotating wheel with a center body forging combined with composite additive, which comprises the steps of establishing a water bucket model of a target impact type rotating wheel; wherein the water bucket model comprises a central body model and an external water bucket model; selecting a basic forging piece according to the center body model and processing the basic forging piece into a center body forging piece; dividing each external water bucket model into a first welding area and a second welding area according to the welding position of each external water bucket model; respectively welding tail fins on two sides of the center body forging piece, and manufacturing a root water bucket; respectively welding a plurality of preset positions of the circumference of the central body forging at a first processing position before transportation to form a complete external water bucket, and respectively welding first welding areas of the external water bucket at the rest positions of the circumference of the central body forging; and at the second machining position after transportation, performing welding of the second welding area on the first welding area welded at the rest position of the circumference of the center body forging. According to the invention, the integral external bucket at the corresponding position and different welding areas of the external bucket at the rest position are respectively arranged before and after transportation, and the root bucket is manufactured by utilizing the high-stress areas of the welded tail wing and the root bucket, so that the construction period is shortened, the forging difficulty of the central body is reduced, the material utilization rate is improved, and the forging cost is reduced.
Drawings
FIG. 1 is a schematic diagram of the prior art impact wheel manufactured by integral forging.
Fig. 2 is a schematic diagram of the overall process transportation of the conventional impact wheel.
FIG. 3 is a schematic flow chart of a method of manufacturing an impact type runner with a center body forging combined with composite additive according to the present invention.
FIG. 4 is a schematic illustration of a center body forging, an outer tail, and a portion of a high stress region therebetween in accordance with the present invention.
FIG. 5 is a schematic diagram of the welding process of the outer fin and a portion of the high stress region of the present invention.
Fig. 6 is a schematic view of an impact wheel of the present invention being processed prior to shipping.
FIG. 7 is a schematic view of a post-shipping impact wheel of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Currently, in the related technical field, the impact type rotating wheel manufacturing method adopts a mode of integral processing transportation or partial processing transportation, and has the advantages of long construction period, large forging difficulty and low material utilization rate.
To address this problem, various embodiments of the method of manufacturing an impact wheel of the present invention that incorporates a composite additive to a center body forging are presented. According to the manufacturing method of the impact type runner with the combined composite additive material for the center body forging, provided by the invention, the integral external water bucket at the corresponding position and the different welding areas of the external water bucket at the rest position are respectively installed before and after transportation, and the root water bucket is manufactured by utilizing the welded tail wing and root water bucket high-stress areas, so that the construction period is shortened, the difficulty of the center body forging is reduced, the material utilization rate is improved, and the forging cost is reduced.
The embodiment of the invention provides a manufacturing method of an impact type rotating wheel with a center body forging combined with a composite additive, and referring to fig. 3, fig. 3 is a flow diagram of an embodiment of the manufacturing method of the impact type rotating wheel with the center body forging combined with the composite additive.
In this embodiment, a method for manufacturing an impact type runner with a center body forging combined with a composite additive includes the following steps:
s1: establishing a water bucket model of the target impact type rotating wheel; wherein the water bucket model comprises a central body model and an external water bucket model;
s2: selecting a basic forging piece according to the center body model and processing the basic forging piece into a center body forging piece;
s3: dividing each external water bucket model into a first welding area and a second welding area according to the welding position of each external water bucket model;
s4: respectively welding tail fins on two sides of the center body forging piece, and manufacturing a root water bucket;
s5: respectively welding a plurality of preset positions of the circumference of the center body forging at a first processing position before transportation to form a complete external water bucket, and respectively welding first welding areas of the external water bucket at the rest positions of the circumference of the center body forging;
s6: and at a second machining position after transportation, performing welding of a second welding area on the first welding area welded at the rest position of the circumference of the central body forging.
In a preferred embodiment, the axial thickness of the base forging is selected to be configured to be less than the axial thickness of the root bucket high stress region of the target impact runner, and the radial length of the base forging is selected to be configured to be the sum of the radial length of the center body of the target impact runner and the radial length of the oppositely disposed root bucket high stress region.
On this basis, before the fin is welded respectively to center body forging both sides, still include: and for the part of the basic forging, the axial thickness of which is smaller than that of the root water bucket high stress area, adopting laser material increase for welding manufacture to form the complete root water bucket high stress area.
It should be noted that, in this embodiment, the base forging includes the axle of the impact wheel and a part of the root bucket high stress area around the axle, as shown in fig. 4, and the root bucket low stress area of the target impact wheel adopts an externally welded tail fin. Therefore, as shown in fig. 5, the root bucket low stress area formed by the tail fin, a part of the root bucket high stress area in the basic forging and another part of the root bucket high stress area between the basic forging and the tail fin, which are manufactured by welding through laser material increase, jointly form the root bucket, so that the selection thickness and the processing difficulty of the center body forging are reduced.
That is, the tail fin is a root bucket low stress area of the target impact type runner, and the tail fin and the complete root bucket high stress area form a root bucket together.
It is easy to understand that in the process of selecting the basic forging and processing the basic forging into the center body forging, the method further comprises the steps of arranging a through hole at the axis and connecting with the rotating shaft of the generator in a matched mode.
In this embodiment, the externally welded tail fin employs a robotic arc additive manufacturing process.
In a preferred embodiment, fin welding is performed on two sides of the center body forging respectively, and the method specifically comprises the following steps: calibrating the positions of the center body forging and the material adding equipment; arc material adding manufacturing is carried out on the tail wing at preset positions on two sides of the center body forging piece by using material adding equipment, and a root water bucket low-stress area is obtained.
In a preferred embodiment, the outer buckets are made using arc additive on the center body forging and root buckets. That is, the center body with root water bucket is manufactured by adopting forge pieces and composite additive materials, the outer water bucket is manufactured by adopting an electric arc additive material process, and the manufacturing period is shortened on the basis of meeting the processing and transportation efficiency.
Specifically, as shown in fig. 6, the first processing position before transportation is in the processing plant, and the plurality of preset positions of the circumference of the central body forging are configured as relative positions of the circumference of the central body forging, so that after the plurality of preset positions are respectively welded with the complete external water bucket and the first welding areas of the external water bucket are respectively welded at the rest positions, an impact type runner intermediate piece with the width smaller than the radial length of the target impact type runner and greater than the length of the meridian of the central body forging and the length equal to the radial length of the central body forging is formed.
Specifically, as shown in fig. 7, the second machining position after transportation is the installation place, and the rest position of the circumference of the center body forging piece is configured as the position of the second welding area where the external water bucket is not welded temporarily by the impact type runner intermediate piece, so that the complete impact type runner is formed after the external water bucket is welded at the rest position respectively.
The tangential planes of the first welding areas of the external water hoppers on two sides of the impact type runner intermediate piece are arranged in parallel, and the length between the two parallel planes is the width of the impact type runner intermediate piece.
The embodiment provides a manufacturing method of an impact type runner with a combined composite additive material of a central body forging, which is characterized in that different welding areas of an integral external water bucket at a corresponding position and an external water bucket at a residual position are respectively installed before and after transportation, and a root water bucket is manufactured by utilizing a welded tail wing and root water bucket high-stress area, so that the construction period is shortened, the difficulty of the central body forging is reduced, the material utilization rate is improved, and the forging cost is reduced.
The foregoing description is only of the preferred embodiments of the invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalent structure or equivalent flow scheme disclosed in the specification and drawings, or any other related art, directly or indirectly, as desired.

Claims (9)

1. A method of manufacturing an impact wheel with a center body forging combined with a composite additive, the method comprising the steps of:
s1: establishing a water bucket model of the target impact type rotating wheel; wherein the water bucket model comprises a central body model and an external water bucket model;
s2: selecting a basic forging piece according to the center body model and processing the basic forging piece into a center body forging piece;
s3: dividing each external water bucket model into a first welding area and a second welding area according to the welding position of each external water bucket model;
s4: respectively welding tail fins on two sides of the center body forging piece, and manufacturing a root water bucket;
s5: respectively welding a plurality of preset positions of the circumference of the center body forging at a first processing position before transportation to form a complete external water bucket, and respectively welding first welding areas of the external water bucket at the rest positions of the circumference of the center body forging;
s6: and at a second machining position after transportation, performing welding of a second welding area on the first welding area welded at the rest position of the circumference of the central body forging.
2. The method for manufacturing an impact type runner with a combined composite additive material according to claim 1, wherein in the step S2, the axial thickness of the base forging is selected to be smaller than the axial thickness of the root bucket high stress area of the target impact type runner, and the radial length of the base forging is selected to be the sum of the radial length of the center body of the target impact type runner and the radial length of the oppositely arranged root bucket high stress area.
3. The method of manufacturing an impact wheel with composite additive material combined with a center body forging according to claim 2, wherein before the tail fins are welded on two sides of the center body forging, the method further comprises: and for the part of the basic forging, the axial thickness of which is smaller than that of the root water bucket high stress area, adopting laser material increase for welding manufacture to form the complete root water bucket high stress area.
4. A method of manufacturing an impact wheel with a composite additive material in combination with a hub forging as recited in claim 3, wherein said tail is a root bucket low stress region of a target impact wheel, said tail and said complete root bucket high stress region together forming a root bucket.
5. The method for manufacturing the impact type rotating wheel with the combination of the central body forging and the composite additive according to claim 1, wherein the tail fins are welded on two sides of the central body forging respectively, specifically comprising: calibrating the positions of the center body forging and the material adding equipment; arc material adding manufacturing is carried out on the tail wing at preset positions on two sides of the center body forging piece by using material adding equipment, and a root water bucket low-stress area is obtained.
6. The method for manufacturing the impact type rotating wheel combining the central body forging with the composite additive according to claim 1, wherein the first processing position before transportation is in a processing factory, a plurality of preset positions of the circumference of the central body forging are configured as relative positions of the circumference of the central body forging, so that after the complete external water hoppers are respectively welded at the plurality of preset positions and the first welding areas of the external water hoppers are respectively welded at the rest positions, the impact type rotating wheel intermediate part with the width smaller than the radial length of the target impact type rotating wheel and larger than the length of the meridian of the central body forging and the length equal to the radial length of the central body forging is formed.
7. The method of manufacturing an impact wheel with composite additive material combined with a center body forging according to claim 6, wherein the second machining position after transportation is a mounting place, and the remaining positions of the circumference of the center body forging are configured as positions of second welding areas where the impact wheel intermediate part is not welded with the outer water bucket temporarily, so that the complete impact wheel is formed after the outer water bucket is welded at the remaining positions respectively.
8. The method of manufacturing an impact type runner with a composite additive combined with a center body forging according to claim 6, wherein tangential planes of the impact type runner intermediate piece corresponding to the first welding area of the external water bucket are arranged in parallel on two sides of the impact type runner intermediate piece, and the length between the two parallel planes is the width of the impact type runner intermediate piece.
9. The method of manufacturing a composite additive impact wheel in combination with a center body forging of claim 7, wherein welding the first weld zone and the second weld zone employs an arc additive manufacturing process.
CN202310468430.5A 2023-04-27 2023-04-27 Manufacturing method of impact type rotating wheel with combination of center body forging and composite additive Pending CN116423087A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310468430.5A CN116423087A (en) 2023-04-27 2023-04-27 Manufacturing method of impact type rotating wheel with combination of center body forging and composite additive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310468430.5A CN116423087A (en) 2023-04-27 2023-04-27 Manufacturing method of impact type rotating wheel with combination of center body forging and composite additive

Publications (1)

Publication Number Publication Date
CN116423087A true CN116423087A (en) 2023-07-14

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Application Number Title Priority Date Filing Date
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