CN111570695A - Large three-way die forging device for power station equipment and die forging method thereof - Google Patents
Large three-way die forging device for power station equipment and die forging method thereof Download PDFInfo
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- CN111570695A CN111570695A CN202010447453.4A CN202010447453A CN111570695A CN 111570695 A CN111570695 A CN 111570695A CN 202010447453 A CN202010447453 A CN 202010447453A CN 111570695 A CN111570695 A CN 111570695A
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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
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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
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
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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
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/02—Special design or construction
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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
- B21J9/00—Forging presses
- B21J9/10—Drives for forging presses
- B21J9/12—Drives for forging presses operated by hydraulic or liquid pressure
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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
- B21K1/14—Making machine elements fittings
- B21K1/16—Making machine elements fittings parts of pipe or hose couplings
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Abstract
The invention discloses a large three-way die forging device for power station equipment and a die forging method thereof, and the technical scheme is as follows: a large tee die forging device for power station equipment comprises a bottom plate, a lower die and an upper die, wherein the lower die comprises a main cavity, a first branch cavity and a second branch cavity which are all semi-cylindrical, the upper die corresponds to the lower die in structure, and a cavity for forming a large Y-shaped tee is formed by the lower die and the upper die in a surrounding manner; the bottom plate is connected with a trunk propelling device, a first branch plugging device and a second branch plugging device, and the first branch plugging device and the second branch plugging device are consistent in structure and respectively correspond to the first branch cavity and the second branch cavity. The invention improves the forming qualification rate of the forged large Y-shaped tee joint, shortens the production period while ensuring the reliability, reduces the operation cost of factory equipment and improves the benefit and the competitiveness of enterprises.
Description
Technical Field
The invention relates to the field of die forging of large tee pieces, in particular to a die forging device and a die forging method of a large tee piece for power station equipment.
Background
The large Y-tee is one of the most important core components in the current thermal power generation and nuclear power generation systems, and its functions are used for transferring and shunting high-temperature and high-pressure steam, etc. With the continuous development of the power generation industry in China, the demand of large-scale tee joints is larger and larger, the requirements on the tee joints are high, and besides excellent performance is guaranteed, the requirements on the processing period, the production cost and the like are also high.
The current large Y-shaped three-way products mainly comprise two production modes of free forging and die forging. The free forging is generally performed by using a large hydraulic press, drilling holes in combination with machining, trimming and finally forming. The swaging is typically made using a die having a "Y" cavity, with a total of 3 holes in the Y die, one hole for advancing the punch 404, and two other holes either directly closed or partially blocked inward with inserts to ensure that during extrusion, both branches of the Y are extruded by the inserts into a cylindrical hole to reduce post-machining drilling.
When the integral Y-shaped tee joint is forged in a free forging mode, the material utilization rate is low, the material is greatly wasted, the production cost is improved, the production period is long, and the method is not suitable for mass production.
When the integral Y-shaped tee joint is forged by adopting a die forging mode, if no insert block is arranged on the Y-shaped branch, the workload of later machining and drilling is large; having set up the abaculus and stretched into in the mould, because the mobility problem under the metal high temperature, probably the metal can't be according to the perfect inflow of preset state and fill the space between abaculus and the mould inner wall, also can't form the cylindrical hole of abaculus shape during the extrusion to cause the die forging product unqualified.
Therefore, there is a need to improve the technology to overcome the above-mentioned drawbacks.
Disclosure of Invention
The invention aims to provide a large tee die forging device for power station equipment and a die forging method thereof, which improve the forming qualification rate of a forged large Y-shaped tee, shorten the production period while ensuring the reliability, reduce the operation cost of factory equipment and improve the enterprise benefit and competitiveness.
The technical purpose of the invention is realized by the following technical scheme: a large tee die forging device for power station equipment comprises a bottom plate, a lower die and an upper die, wherein the lower die comprises a main cavity, a first branch cavity and a second branch cavity which are all semi-cylindrical, the upper die corresponds to the lower die in structure, and a cavity for forming a large Y-shaped tee is formed by the lower die and the upper die in a surrounding manner; the bottom plate is connected with a trunk pushing device, a first branch plugging device and a second branch plugging device, and the first branch plugging device and the second branch plugging device are consistent in structure and respectively correspond to a first branch cavity and a second branch cavity;
the main road propelling device comprises a main road main machine box body arranged on the bottom plate, a main road hydraulic push rod arranged on the main road main machine box body, a main road push plate arranged at the output end of the main road hydraulic push rod, and a punch head arranged on the main road push plate and capable of being arranged in the main cavity in a penetrating manner;
first branch road plugging device including set up in the branch road host computer box of bottom plate, set up in the branch road hydraulic rod of branch road host computer box, set up in but branch road hydraulic rod and shutoff the closure plate of first branch die cavity, set up in the closure plate is towards the end cap of first branch die cavity one end, the end cap can be worn to locate first branch die cavity.
The invention is further provided with: the main road hydraulic push rod and the branch road hydraulic push rod are all four, and the main road hydraulic push rod and the branch road hydraulic push rod are uniformly distributed around the corresponding punch or plug respectively.
The invention is further provided with: the punch is in threaded connection with the trunk push plate, and the plug is in threaded connection with the blocking plate.
The invention is further provided with: and the main road main machine box body and the branch road main machine box body are internally provided with motors for driving the corresponding punches or plugs to rotate.
The invention is further provided with: the blocking plate is provided with a pressure sensor for detecting the pressure borne by the blocking plate.
The invention is further provided with: the side wall of the first branch cavity of the lower die is provided with a plurality of scale marks.
The invention is further provided with: the end part of the plug is arranged in a flat head shape or a pointed head shape.
The invention is further provided with: a die forging method of a large three-way die forging device for power station equipment comprises the following steps: step 1, preparation work, wherein a trunk main machine box body in a trunk propelling device operates and drives four trunk hydraulic push rods, a trunk push plate and a punch to retreat and separate from a main cavity; the first branch plugging device and the second branch plugging device drive the corresponding plugs to separate from the first branch cavity and the second branch cavity and move the upper die;
step 2, starting to work, heating the cylindrical metal blank material to be extruded to 1200 ℃ in a heating furnace, and then clamping and placing the cylindrical metal blank material in a main cavity of a lower die by a clamp;
step 3, buckling an upper die on a lower die, pressing the top of the upper die by an external press, and driving a trunk push plate and a punch head to move towards the inside of a main cavity by a trunk hydraulic push rod of a trunk main machine box body in a trunk propelling device so that the front end surface of the trunk push plate is flush with the outer end surface of the main cavity of the die; the front end surfaces of the blocking plates in the first branch blocking device and the second branch blocking device are respectively attached to the outer surfaces of the first branch cavity and the second branch cavity to compress and block the first branch cavity and the second branch cavity;
step 4, adjusting the initial position of the plug, and according to the metal fluidity condition to be forged, rotating the motors of the first branch plugging device and the second branch plugging device and driving the plug to rotate and move, so that the front end face of the plug is leveled with the corresponding scale mark, and on the premise of ensuring the extrusion forming effect, corresponding holes of the large Y-shaped tee joint are formed in the die;
step 5, starting extrusion, wherein a trunk hydraulic push rod of a trunk propelling device pushes a trunk push plate and a punch to move forwards completely, so that the trunk push plate and the punch enter a main cavity of a die, contact with a cylindrical high-temperature metal material and continuously extrude the cylindrical high-temperature metal material to deform the cylindrical high-temperature metal material, and the material continuously flows to a first branch cavity and a second branch cavity to fill branch spaces;
and 6, according to the length requirement of all three pipelines of the Y-shaped tee joint, when the front end face of the push plate reaches a preset position, the length of a main trunk of the Y-shaped tee joint is qualified, at the moment, the trunk push plate in the trunk propelling device stops continuously propelling, the trunk push plate is kept still, a motor in the trunk propelling device works, the punch is driven to continuously move forwards until the front end face of the punch reaches the preset position, and the work is stopped.
Step 7, branch detection and compensation, wherein after the metal is extruded and flows to the first branch and the second branch, branch spaces are filled, and the metal continues to flow into gaps among the plugs, the upper die and the lower die cavity until the metal cannot continue to flow after the metal contacts with the front end face of the blocking plate;
step 8, after the metal is cooled, the punch and the plug rotate and move away under the driving of respective motors, the punch moves to be level with the surface of the main road push plate, and the plug moves to be level with the surface of the plug plate; then, the main path propelling device, the first branch plugging device and the second branch plugging device drive the corresponding punch and the corresponding plug to be removed from the die cavity, the pressing device at the top of the upper die is removed, the extruded Y-shaped tee joint is taken out, the Y-shaped tee joint is transferred to a machining area to be further subjected to machining work such as drilling, reaming, finishing and the like, and finally the product is completely molded.
The invention is further provided with: in step 7, the pressure sensor positioned on the back of the blocking plate works all the time to detect pressure changes, when the pressure sensors detect the pressure changes and the numerical values are basically equivalent, the metal is fully extruded and formed, the metal of the two branches is fully contacted with the blocking plate, all gaps are filled, and the large Y-shaped tee joint is preliminarily formed; if the pressure sensor on the blocking plate does not detect the pressure change, or the sensor detects the pressure change only in partial position, and the partial position of the sensor does not detect the pressure change, the extrusion is not sufficient, and the metal does not flow to completely fill the gap between the plug and the mold cavity.
In conclusion, the invention has the following beneficial effects:
when the die is used, metal to be forged is placed into the main cavity and buckled with the die, the hydraulic mechanism in the box body of the main machine of the first branch circuit controls the hydraulic push rod of the branch circuit to move, so that the plug head penetrates into the corresponding first branch cavity or the second branch cavity, and meanwhile, the plug plate is respectively abutted against and covers the end face of the corresponding first branch cavity or the second branch cavity; then, a hydraulic mechanism in the main machine box body of the main machine controls a main hydraulic push rod to extend, and pushes a main push plate and a punch to move towards the main cavity, so that the main push plate is abutted against the end face of the main cavity, and the punch is driven by a motor in the main machine box body of the main machine to spirally move towards the main cavity, thereby realizing extrusion forging of metal materials; when the first branch cavity or the second branch cavity is not filled with the slow metal material, the motor in the corresponding branch main machine box body drives the corresponding plug to move spirally, so that the metal material is further extruded, the cavity is ensured to be filled with the metal material, and the forging of the large Y-shaped tee joint is completed.
Because different metal materials are different in material and different in flowability in a metal melting state, when the blocking plate abuts against the first branch cavity and the second branch cavity, the motor in the corresponding branch host box drives the plug to rotate, so that the end face of the plug moves to the position corresponding to the scale mark, and the purpose of adapting to the metal materials with different flowability is achieved. When the metal material is extruded and forged, pressure change is detected through the pressure sensor, if the pressure change is detected at a plurality of detection positions of the pressure sensor and the numerical values are basically equivalent, the metal is fully extruded and formed, the metal of the two branches is fully contacted with the blocking plate, all gaps are filled, and the Y-shaped tee product is preliminarily formed; if the pressure sensor does not detect the pressure change, or the position of the blocking plate part detects the pressure change, and the rest part does not detect the pressure change, the extrusion is not sufficient, and the metal does not flow to completely fill the gap between the plug and the cavity, at the moment, due to the size limitation of the product, the propulsion work of the trunk propulsion device reaches the preset position and can not continue to advance, at the moment, the motor in the first branch plugging device works to drive the plug to continue to move forwards, the space is further compressed, and the metal is extruded to flow to fill the gap.
According to the device and the method, parameters can be adjusted and the extrusion state can be detected according to the characteristics of different metal flowability, so that the forged large Y-shaped tee joint is qualified in forming, the defective rate is reduced, the later machining amount is reduced as much as possible, the reliability is improved, the production period is shortened, the operation cost of factory equipment is reduced, and the enterprise benefit and the competitiveness are improved.
Drawings
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is a schematic view of an upper mold and a lower mold in example 1;
FIG. 3 is a front view of the lower mold;
FIG. 4 is a schematic view showing the structure of example 1 with the upper mold hidden;
FIG. 5 is a schematic view of a dry road propulsion device;
figure 6 is a schematic view of a first branch occlusion device;
FIG. 7 is a schematic view of the product processed in example 1.
The corresponding part names indicated by the numbers in the figures: 100. a base plate; 200. a lower die; 201. a main cavity; 202. a first branch cavity; 203. a second branch cavity; 300. an upper die; 400. a trunk propulsion device; 401. a trunk main machine box body; 402. a main line hydraulic push rod; 403. a trunk push plate; 404. a punch; 500. a first branch plugging device; 501. a branch main machine box body; 502. a branch hydraulic push rod; 503. a blocking plate; 504. a plug; 600. and a second branch plugging device.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easy to understand, the invention is further described with reference to the figures and the specific embodiments.
Example 1: as shown in fig. 1 to 7, the large three-way die forging apparatus for power plant equipment according to the present invention includes a base plate 100, a lower die 200, and an upper die 300. The lower die 200 comprises a main die cavity 201, a first branch die cavity 202 and a second branch die cavity 203, the main die cavity, the first branch die cavity 202 and the second branch die cavity 203 are all semi-cylindrical, the upper die 300 corresponds to the lower die 200 in structure, and a cavity for forming a large Y-shaped tee joint is formed after the lower die 200 and the upper die 300 are enclosed.
The bottom plate 100 is connected with a trunk propelling device 400, a first branch plugging device 500 and a second branch plugging device 600, wherein the first branch plugging device 500 and the second branch plugging device 600 have the same structure and respectively correspond to the first branch cavity 202 and the second branch cavity 203.
The main-road propelling device 400 includes a main-road main machine box 401 disposed on the bottom plate 100, a main-road hydraulic push rod 402 disposed on the main-road main machine box 401, a main-road push plate 403 disposed at an output end of the main-road hydraulic push rod 402, and a punch 404 disposed on the main-road push plate 403 and capable of being inserted into the main cavity 201. The punch 404 is screwed with the trunk push plate 403. A hydraulic mechanism (such as a hydraulic cylinder) corresponding to the main-path hydraulic push rod 402 is arranged in the main-path main machine box 401, and the main-path hydraulic push rod 402 is controlled to extend and retract by the hydraulic mechanism in the main-path main machine box 401, and the movement of the main-path push plate 403 and the punch 404 is controlled. And a motor (not labeled in the figure) for controlling the punch 404 to rotate is further arranged in the trunk circuit main machine box 401, the output end of the motor can be connected with the punch 404 in an inserting manner, and the punch 404 can move in a stretching manner relative to the output end of the motor while the motor drives the punch 404 to rotate.
The first branch plugging device 500 includes a branch main body case 501 disposed on the bottom plate 100, a branch hydraulic rod 502 disposed on the branch main body case 501, a plugging plate 503 disposed on the branch hydraulic rod 502 and capable of plugging the first branch cavity 202, and a plug 504 disposed at an end of the plugging plate 503 facing the first branch cavity 202, wherein the plug 504 is capable of being inserted into the first branch cavity 202. In this embodiment, the plug 504 is connected to the plug 503 by a screw. The structure of the branch main machine box 501 is the same as that of the main machine box 401, and a motor for controlling the plug 504 to rotate spirally is also provided.
When the forging die is used, metal to be forged is placed into the main cavity 201 and buckled with the upper die 300, a hydraulic mechanism in the first branch main machine box body 501 controls the branch hydraulic push rod 502 to move, so that the plug 504 penetrates into the corresponding first branch cavity 202 or the second branch cavity 203, and meanwhile, the plug plate 503 is respectively abutted against and covers the end face of the corresponding first branch cavity 202 or the second branch cavity 203; then, a hydraulic mechanism in the main machine box 401 of the main road controls a hydraulic push rod 402 of the main road to extend, and pushes a push plate 403 and a punch 404 of the main road to move towards the main cavity 201, and the push plate 403 of the main road abuts against the end face of the main cavity 201, and the punch 404 is driven by a motor in the main machine box 401 of the main road to move towards the inner part of the main cavity 201 in a spiral manner, so that the extrusion forging of metal materials is realized; when the first branch cavity 202 or the second branch cavity 203 is not filled with the slow metal material, the motor in the main case 501 of the corresponding branch drives the corresponding plug 504 to move spirally, so that the metal material is further extruded, the cavity is ensured to be filled with the metal material, and the forging of the large Y-shaped tee joint is completed.
In this embodiment, the end of the plug 504 may be flat or pointed; the main hydraulic push rod 402 and the branch hydraulic push rod 502 are four, and the main hydraulic push rod 402 and the branch hydraulic push rod 502 are uniformly distributed around the corresponding punch 404 or the plug 504.
Embodiment 2 is further designed on the basis of embodiment 1, the blocking plate 503 is provided with a pressure sensor for detecting pressure applied to the blocking plate 503, and the pressure sensor can sense pressure changes of the blocking plate 503 at a plurality of positions surrounding the plug 504 and can transmit pressure signals to an upper computer for processing, and the pressure sensor in the embodiment is the prior art and is not described herein; in addition, in this embodiment, a plurality of pressure sensors may be disposed and distributed around the plug 504.
And the side walls of the first and/or second branch cavities 202 and 203 of the lower mold 200 are provided with a plurality of graduation marks. In this embodiment, the first branch cavity 202 is selected to have three graduation marks.
Because different metal materials have different materials and have different flowability in a molten metal state, when the blocking plate 503 abuts against the first branch cavity 202 and the second branch cavity 203, the motor in the corresponding branch main machine box 501 drives the plug 504 to rotate, so that the end face of the plug 504 moves to the position corresponding to the graduation line, and the purpose of adapting to the metal materials with different flowability is achieved. When the metal material is extruded and forged, pressure change is detected through the pressure sensor, if the pressure change is detected at a plurality of detection positions of the pressure sensor and the values are basically equivalent, the metal is fully extruded and formed, the metal of the two branches is fully contacted with the blocking plate 503, all gaps are filled, and the Y-shaped tee product is preliminarily formed; if the pressure sensor does not detect the pressure change, or the position of the blocking plate 503 detects the pressure change, and the rest part does not detect the pressure change, it indicates that the extrusion is insufficient, and the metal does not flow to completely fill the gap between the plug 504 and the cavity, at this time, due to the size limitation of the product, the pushing operation of the trunk pushing device 400 has reached the preset position and cannot continue to advance, and then the motor in the first branch plugging device 500 operates to drive the plug 504 to continue to move forward, further compress the space, and extrude the metal to flow, so as to fill the gap. The second branch plugging device 600 has the same structure and is not described in detail.
Embodiment 3, a die forging method of a large three-way die forging device for power station equipment, comprising the following steps:
step 1, preparation work, wherein a main road main machine box 401 in a main road propelling device 400 operates and drives four main road hydraulic push rods 402, a main road push plate 403 and a punch 404 to retreat and separate from a main cavity 201; the first branch plugging device 500 and the second branch plugging device 600 drive the corresponding plugs 504 to separate from the first branch cavities 202 and the second branch cavities 203, and move away from the upper mold 300.
And 2, starting working, heating the cylindrical metal blank material to be extruded to 1200 ℃ in a heating furnace, and then clamping and placing the cylindrical metal blank material in the main cavity 201 of the lower die 200 by a clamp.
Step 3, the upper die 300 is buckled on the lower die 200, the top of the upper die 300 is pressed by an external press, a trunk main machine box 401 in the trunk propelling device 400 drives a trunk push plate 403 and a punch 404 to move towards the main cavity 201 through a trunk hydraulic push rod 402, so that the front end surface of the trunk push plate 403 is flush with the outer end surface of the main cavity 201 of the die; the front end surfaces of the blocking plates 503 of the first branch blocking device 500 and the second branch blocking device 600 are respectively attached to the outer surfaces of the first branch cavity 202 and the second branch cavity 203 to tightly press and block the first branch cavity 202 and the second branch cavity 203.
And 4, adjusting the initial position of the plug 504, and according to the fluidity of the metal to be forged, rotating the motors of the first branch plugging device 500 and the second branch plugging device 600 and driving the plug 504 to rotate and move, so that the front end surface of the plug 504 is flush with the corresponding scale marks, and corresponding holes of the large Y-shaped tee joint are formed in the die on the premise of ensuring the extrusion forming effect.
And 5, starting extrusion, wherein a trunk hydraulic push rod 402 of the trunk propelling device 400 pushes a trunk push plate 403 and a punch 404 to move forwards completely, so that the trunk push plate 403 and the punch 404 enter a main cavity 201 of the die to contact with the cylindrical high-temperature metal material, the cylindrical high-temperature metal material is extruded continuously to deform, the material flows towards the first branch and the second branch continuously, and branch spaces are filled.
And 6, according to the length requirement of all three pipelines of the Y-shaped tee joint, when the front end face of the push plate 403 reaches a preset position, the length of a main trunk of the Y-shaped tee joint is qualified, at the moment, the trunk push plate 403 in the trunk propelling device 400 stops to continue to propel, the trunk push plate 403 keeps still, a motor in the trunk propelling device 400 works, the punch 404 is driven to continue to move forwards until the front end face of the punch 404 reaches the preset position, and the work is stopped.
And 7, branch detection and compensation, wherein after the metal is extruded and flows to the first branch and the second branch, branch spaces are filled, and the metal continues to flow into gaps between the plugs 504 and the cavities of the upper die 300 and the lower die 200 until the metal cannot continue to flow after the metal contacts with the front end faces of the plug plates 503.
Step 8, after the metal is cooled, the punch 404 and the plug 504 rotate and move away under the driving of respective motors, the punch 404 moves to be level with the surface of the trunk push plate 403, and the plug 504 moves to be level with the surface of the plug plate 503; then, the trunk pushing device 400, the first branch plugging device 500 and the second branch plugging device 600 drive the corresponding punch 404 and the plug 504 to withdraw from the die cavity of the die, the pressing device at the top of the upper die 300 is removed, the extruded Y-shaped tee joint is taken out, the Y-shaped tee joint is transferred to a machining area to further perform machining operations such as drilling, reaming, finishing and the like, and finally the product is completely molded.
In step 7, the pressure sensor located on the back of the blocking plate 503 works all the time to detect pressure changes, and when one circle of pressure sensor detects pressure changes and the values are basically equivalent, it indicates that the metal is fully extruded and formed, the metal of the two branches is fully contacted with the blocking plate 503, all gaps are filled, and the large Y-shaped tee joint is preliminarily formed; if the pressure sensor located at the back of the blocking plate 503 does not detect the pressure change, or the sensor detects the pressure change only at a part of the positions, and the pressure change is not detected at a part of the positions of the sensor, it indicates that the extrusion is not sufficient, and the metal does not flow to completely fill the gap between the plug 504 and the mold cavity, at this time, due to the size limitation of the product, the pushing operation of the trunk pushing device 400 has reached the preset position and cannot continue to advance, and then the motors in the first branch blocking device 500 and the second branch blocking device 600 work to drive the plug 504 to continue to move forward, further compress the space, and extrude the metal to flow to fill the gap.
In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the purpose of clarity and convenience of description of the technical solutions, and thus, should not be construed as limiting the present invention.
As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a power station equipment is with large-scale tee bend die forging device, includes bottom plate (100), bed die (200), goes up mould (300), its characterized in that: the lower die (200) comprises a main die cavity (201), a first branch die cavity (202) and a second branch die cavity (203), the main die cavity, the first branch die cavity and the second branch die cavity are all semi-cylindrical, the upper die (300) is structurally corresponding to the lower die (200), and a cavity for forming a large Y-shaped tee joint is formed after the lower die (200) and the upper die (300) are surrounded; the bottom plate (100) is connected with a trunk propelling device (400), a first branch plugging device (500) and a second branch plugging device (600), and the first branch plugging device (500) and the second branch plugging device (600) are consistent in structure and respectively correspond to the first branch cavity (202) and the second branch cavity (203);
the main road propelling device (400) comprises a main road main machine box body (401) arranged on the bottom plate (100), a main road hydraulic push rod (402) arranged on the main road main machine box body (401), a main road push plate (403) arranged at the output end of the main road hydraulic push rod (402), and a punch (404) arranged on the main road push plate (403) and capable of being arranged in the main cavity (201) in a penetrating manner;
first branch road plugging device (500) including set up in branch road host computer box (501) of bottom plate (100), set up in branch road hydraulic rod (502) of branch road host computer box (501), set up in branch road hydraulic rod (502) and can the shutoff jam plate (503) of first branch die cavity (202), set up in jam plate (503) are towards end cap (504) of first branch die cavity (202) one end, end cap (504) can be worn to locate first branch die cavity (202).
2. The large three-way die forging device for the power station equipment as claimed in claim 1, wherein: the main hydraulic push rods (402) and the branch hydraulic push rods (502) are four in number, and the main hydraulic push rods (402) and the branch hydraulic push rods (502) are uniformly distributed around the corresponding punch heads (404) or plugs (504) respectively.
3. The large three-way die forging device for the power station equipment as claimed in claim 2, wherein: the punch (404) is in threaded connection with the trunk push plate (403), and the plug (504) is in threaded connection with the plug plate (503).
4. The large three-way die forging device for the power station equipment as claimed in claim 3, wherein: and motors for driving the corresponding punches (404) or plugs (504) to rotate are arranged in the main circuit main machine box body (401) and the branch circuit main machine box body (501).
5. The large three-way die forging device for the power station equipment as claimed in claim 4, wherein: the blocking plate (503) is provided with a pressure sensor for detecting the pressure borne by the blocking plate (503).
6. The large three-way die forging device for the power station equipment as claimed in claim 5, wherein: the side wall of the first branch cavity (202) of the lower die (200) is provided with a plurality of scale marks.
7. The large three-way die forging device for the power station equipment as claimed in claim 3, wherein: the end part of the plug (504) is arranged in a flat head shape or a pointed head shape.
8. A die forging method of a large three-way die forging device for power station equipment is characterized by comprising the following steps: the method comprises the following steps: step 1, preparation work, wherein a trunk main machine box body (401) in a trunk propelling device (400) operates and drives four trunk hydraulic push rods (402), a trunk push plate (403) and a punch (404) to retreat and separate from a main cavity (201); the first branch plugging device (500) and the second branch plugging device (600) drive the corresponding plugs (504) to separate from the first branch cavity (202) and the second branch cavity (203), and the upper die (300) is moved away;
step 2, starting to work, heating the cylindrical metal blank material to be extruded to 1200 ℃ in a heating furnace, and then clamping the cylindrical metal blank material in a main cavity (201) of a lower die (200) by a clamp;
step 3, the upper die (300) is buckled on the lower die (200), the top of the upper die (300) is pressed by an external press, a trunk main machine box body (401) in the trunk propelling device (400) drives a trunk push plate (403) and a punch (404) to move towards the main die cavity (201) through a trunk hydraulic push rod (402), so that the front end surface of the trunk push plate (403) is flush with the outer end surface of the main die cavity (201) of the die; the front end surfaces of the blocking plates (503) in the first branch blocking device (500) and the second branch blocking device (600) are respectively attached to the outer surfaces of the first branch cavity (202) and the second branch cavity (203) to be pressed tightly and block the first branch cavity (202) and the second branch cavity (203);
step 4, adjusting the initial position of the plug (504), and according to the metal fluidity condition to be forged, rotating the motors of the first branch plugging device (500) and the second branch plugging device (600) and driving the plug (504) to rotate and move so that the front end face of the plug (504) is level with the corresponding scale lines, and on the premise of ensuring the extrusion forming effect, forming corresponding holes of the large Y-shaped tee in the die;
step 5, starting extrusion, wherein a trunk hydraulic push rod (402) of a trunk propelling device (400) pushes a trunk push plate (403) and a punch (404) to move forwards completely, so that the trunk push plate (403) and the punch (404) enter a main cavity (201) of a die, contact with a cylindrical high-temperature metal material, continuously extrude the cylindrical high-temperature metal material to deform the cylindrical high-temperature metal material, and the material continuously flows to a first branch cavity (202) and a second branch cavity (203) to fill branch spaces;
and 6, according to the length requirement of all three pipelines of the Y-shaped tee joint, when the front end face of the push plate (403) reaches a preset position, the length of a main trunk of the Y-shaped tee joint is qualified, at the moment, the main trunk push plate (403) in the trunk propelling device (400) stops continuously propelling, the main trunk push plate (403) is kept still, a motor in the trunk propelling device (400) works to drive the punch (404) to continuously move forwards until the front end face of the punch (404) reaches the preset position, and the work is stopped.
Step 7, branch detection and compensation, wherein after the metal is extruded and flows to the first branch and the second branch, branch spaces are filled, and the metal continues to flow into gaps between the plug (504) and the cavities of the upper die (300) and the lower die (200) until the metal cannot continue to flow after the metal contacts with the front end face of the plug plate (503);
step 8, after the metal is cooled, the punch (404) and the plug (504) rotate and move away under the driving of respective motors, the punch (404) moves to be level with the surface of the trunk push plate (403), and the plug (504) moves to be level with the surface of the plug plate (503); then, the main path pushing device (400), the first branch path blocking device (500) and the second branch path blocking device (600) drive the corresponding punch (404) and the plug (504) to withdraw from the die cavity of the die, the pressing device at the top of the upper die (300) is removed, the extruded Y-shaped tee joint is taken out, the Y-shaped tee joint is transferred to a machining area to further perform machining work such as drilling, reaming, trimming and the like, and finally the product is completely formed.
9. The die forging method of the large three-way die forging device for the power station equipment as claimed in claim 8, wherein: in the step 7, the pressure sensors positioned on the back of the blocking plate (503) work all the time to detect pressure changes, when the pressure sensors detect the pressure changes and the numerical values are basically equivalent, the metal is fully extruded and formed, the metal of the two branches is fully contacted with the blocking plate (503), all gaps are filled, and the large Y-shaped tee joint is preliminarily formed; if the pressure sensor on the blocking plate (503) does not detect the pressure change, or the sensor detects the pressure change only in partial position, and the pressure change is not detected in partial position of the sensor, the extrusion is not sufficient, the metal does not flow to completely fill the gap between the plug (504) and the die cavity, at this time, due to the limitation of product size, the pushing operation of the main path pushing device (400) reaches the preset position and cannot continue to advance, then the motors in the first branch path blocking device (500) and the second branch path blocking device (600) work, the plug (504) is driven to continue to move forwards, the space is further compressed, and the metal is extruded to flow to fill the gap.
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| CN112846672A (en) * | 2021-01-26 | 2021-05-28 | 中国原子能科学研究院 | Manufacturing method of pressure pipe tee joint |
| CN113953360A (en) * | 2021-10-21 | 2022-01-21 | 河北海航管道制造有限公司 | Manufacturing process and die for cold extrusion steel seamless Y-shaped tee joint |
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Application publication date: 20200825 |