CN108705023B - Profiling forging process for integrated pipe joint section forge piece - Google Patents
Profiling forging process for integrated pipe joint section forge piece Download PDFInfo
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- CN108705023B CN108705023B CN201810637283.9A CN201810637283A CN108705023B CN 108705023 B CN108705023 B CN 108705023B CN 201810637283 A CN201810637283 A CN 201810637283A CN 108705023 B CN108705023 B CN 108705023B
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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
Abstract
The invention relates to the field of forging and discloses a profiling forging process for an integrated pipe joint section forge piece. The process comprises the following steps: forging the blank into a barrel blank with a convex belt; arranging an internal supporting structure at the corresponding position of the raised belt of the cylinder blank, forming a nozzle blank on the raised belt by using a nozzle forming anvil, wherein the nozzle forming anvil is provided with at least two forming lugs, a nozzle forming groove is formed between two adjacent forming lugs, and the forming lugs are extruded to be aligned with the raised belt of the cylinder blank to form the nozzle blank; the nozzle is formed on the basis of the nozzle blank. By adopting the process, the nozzle blank can be formed at any position of the convex belt, and the forming of the nozzles at specific positions and quantity is not limited, so that the application range of the forging process is expanded.
Description
Technical Field
The invention relates to the field of forging, in particular to a profiling forging process for an integrated pipe connecting section forge piece.
Background
With the continuous improvement of nuclear power equipment manufacturing technology and requirements on equipment safety, the structural design of the nuclear power equipment tends to be large-sized and integrated, the number of welding seams of the equipment is reduced as much as possible, the in-service detection period of the equipment is shortened, and the operating efficiency of the nuclear power equipment is improved. In the conventional reactor pressure vessel pipe connecting section, a pipe connecting pipe nozzle and a pipe connecting section cylinder are welded into a whole, so that the number of welding lines is large, the safety performance is relatively low, and the in-service detection period is long.
The patent application with publication number CN105033154A discloses an integral pipe connecting section forging method with a connecting pipe and a flange, which designs the blank size on the basis of determining the characteristic size of the integral pipe connecting section; and simultaneously manufacturing a triangular anvil, a door-shaped hammer head, a bumper, a flanging punch and a flanging lower die. In the forging stage, a hollow blank with an intermediate ring belt is pressed on the position of the connecting pipe ring belt by a triangular anvil, a concave gear is pre-pressed to finish the forming of a connecting pipe boss, and a blank forging is formed by reaming with a door-shaped hammer head and a feed; and finally, roughly processing the blank forging to obtain a flanging blank, and forming a front end pipe nozzle by using a flanging connecting pipe to obtain an integrated integral connecting pipe section finished product. The method realizes the integral forging of the connecting pipe and the flange, reduces the labor intensity, improves the production efficiency and reduces the number of welding lines of the whole pressure vessel.
However, this method also has certain limitations, firstly, because it uses the upper and lower triangular anvils to form the nozzle blank in a matching way, it can only realize the forging of the nozzles arranged along the ring direction, and furthermore, even if the ring direction nozzle is forged, the gaps between the nozzles forged by it are necessarily symmetrically distributed, that is, it can not freely determine the forging position of the nozzle, and it is difficult to realize the forging for some pipe connecting pipe segment forgings with special requirements for the nozzle position.
Disclosure of Invention
The invention aims to solve the technical problem of providing a profiling forging process of an integrated connecting pipe section forge piece, which can more freely and accurately realize the forming of a pipe nozzle and improve the application range of the integrated connecting pipe section forging.
The invention discloses a profiling forging process of an integrated pipe joint section forge piece, which comprises the following steps:
forging the blank into a barrel blank with a convex belt;
arranging an internal supporting structure at the corresponding position of the raised belt of the cylinder blank, forming a nozzle blank on the raised belt by using a nozzle forming anvil, wherein the nozzle forming anvil is provided with at least two forming lugs, a nozzle forming groove is formed between two adjacent forming lugs, and the forming lugs are extruded to be aligned with the raised belt of the cylinder blank to form the nozzle blank;
the nozzle is formed on the basis of the nozzle blank.
Preferably, the raised belt is an endless belt arranged circumferentially around the can blank, and the step of forming the can blank with the endless belt is as follows:
the solid blank is placed in a drain pan for upsetting, a punch is used for forming a middle hole to form a barrel blank, a core rod penetrates through the middle hole of the barrel blank, the blank is placed on a V-shaped anvil, and sections with different diameters are drawn out in sections by using a flat anvil to form the barrel blank with an annular band.
Preferably, the size of the barrel blank formed by drawing is preliminarily calculated according to the size of the forging, and then is determined after verification and optimization through numerical simulation.
Preferably, the protruding belt is an endless belt arranged around the circumference of the cylinder blank, when the nozzle blank is formed, the cylinder blank is placed on a forming lower die, a placing groove matched with the protruding belt is formed in the forming lower die, the protruding belt of the cylinder blank is placed in alignment with the placing groove of the lower die, a nozzle forming anvil is arranged above the cylinder blank, and the nozzle forming anvil presses down to form the nozzle blank.
Preferably, the nozzle forming anvil is further provided with two side baffles, and the distance between the two side baffles is matched with the width of the convex belt;
when the nozzle blank is formed, the baffle plates at two sides are respectively arranged at two sides of the convex belt, and the baffle plates and the nozzle forming anvil are matched to form the nozzle blank.
Preferably, the nozzle forming anvil is provided with a baffle guide rail along the pressure direction, and the baffle is mounted on the baffle guide rail and moves along the baffle guide rail;
when the nozzle blank is formed, firstly, the baffle plates on the two sides slide to the two sides of the convex belt along the rails, and then the nozzle blank is extruded and formed by using the nozzle forming anvil.
Preferably, before the nozzle blank is formed, the barrel blank is reamed by using a reaming tool to reach the process size of the forged piece.
Preferably, the reaming tool comprises a horse frame, a horse bar and a reaming upper anvil, wherein the upper surface of the horse bar is matched with the inner surface of the cylinder blank, and the lower surface of the reaming upper anvil is matched with the outer surface of the cylinder blank;
during reaming, the cross beam penetrates through the cylinder blank, the two ends of the cross beam are erected on the saddle, the reaming upper anvil is arranged above the cylinder blank, the cylinder blank is extruded through the cross beam and the reaming upper anvil, and the cylinder blank is rotated to realize reaming.
Preferably, the internal support structure comprises a core support and an eight-square bar, the outer diameter of the core support is matched with the inner diameter of the barrel blank raised strip position, the core support is provided with a central hole matched with the eight-square bar, and the eight-square bar is inserted into the central hole of the core support.
Preferably, the step of forming the nozzle on the basis of the nozzle blank is as follows:
machining the outer diameter of the pipe nozzle blank to enable the pipe nozzle blank to be matched with a pipe nozzle forming die, machining a positioning hole in the center of the pipe nozzle blank, placing the pipe nozzle blank on the pipe nozzle forming die, arranging a pipe nozzle punch in the positioning hole, enabling the frame type tool to penetrate through the barrel blank, pressing the pipe nozzle punch downwards by the frame type tool, and forming the pipe nozzle of the connecting pipe.
The invention has the beneficial effects that:
1. the nozzle forming anvil with two lugs can form nozzle blank in any position of the raised belt and is no longer limited in forming nozzle in certain position and number, and this enlarges the application range of forging process.
2. The pipe nozzle and the pipe section cylinder are integrally formed by copying forging, so that a welding seam between the pipe nozzle and the pipe section cylinder is eliminated, the safety of a forge piece is improved, and the in-service detection period of equipment is shortened.
3. The profiling forging integrated pipe connecting section is adopted, so that the utilization rate of materials is improved, and the material cost is reduced.
4. When the nozzles which are not uniformly distributed along the circumferential direction are formed, the nozzle blank is formed by the nozzle forming anvil firstly, then the nozzles are formed, the interference problem when 2 adjacent nozzles are formed is avoided, and each nozzle can be forged independently.
Drawings
FIG. 1 is a schematic illustration of upset, impact;
FIG. 2 is a schematic drawing of different diameter sections by stages;
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a schematic view of a barrel blank being reamed using a reaming tool;
FIG. 5 is a schematic view of a shaped nozzle blank;
FIG. 6 is a side view of FIG. 5;
FIG. 7 is a schematic view of the nozzle blank after machining;
FIG. 8 is a schematic view of a tube punch extruded from a nozzle blank.
Reference numerals: the device comprises a cylinder blank 1, a bushing 21, a flat anvil 31, a V-shaped anvil 32, a core rod 33, a reaming upper anvil 41, a bridge 42, a bridge 43, a nozzle forming anvil 51, a baffle 52, an eight-side bridge 53, a core support 54, a forming lower die 55, a baffle guide rail 56, a frame type tool 61, a nozzle punch 62 and a nozzle forming die 63.
Detailed Description
The present invention is further described below.
The invention discloses a profiling forging process of an integrated pipe joint section forge piece, which comprises the following steps:
forging and forming the blank into a barrel blank 1 with a convex belt, wherein the convex belt is the basis of forming a nozzle, the forming nozzle at the position can ensure that the nozzle and the connecting part of the nozzle and the barrel blank 1 have enough wall thickness, the position and the direction of the convex belt are determined according to the arrangement of the nozzle, the number of the convex belts can be one or more, and in order to simplify the process, the positions of all the nozzles are preferably designed on the same convex belt, so that the forging of the nozzle can be realized only by forming one convex belt;
forming a nozzle blank on the convex belt by using a nozzle forming anvil 51, wherein the nozzle forming anvil 51 is provided with two forming convex blocks, a nozzle forming groove is formed between the two forming convex blocks, the two forming convex blocks are aligned with the convex belt of the blank to be extruded, and the acting surface of each convex block is preferably arc-shaped, so that the formed nozzle blank is closer to the shape and the size of the nozzle relative to the shape and the size of the sharp angle; the way of firstly forming the pipe nozzle blank and then forming the pipe nozzle can not only reduce the difficulty of forming the pipe nozzle and improve the quality of the pipe nozzle, but also avoids the problem of mutual interference between the nozzles when a plurality of adjacent nozzles are directly forged, the width of the lug and the width of the nozzle forming groove are determined according to the distance between the nozzles and the diameter of the nozzle respectively, if the nozzles with different diameters are forged on the same forging piece, different sizes of nozzle forming anvils 51 may be used, respectively, the number of lugs is usually two, two lugs can form one nozzle blank, the operation difficulty is low, of course, three or more projections can be designed, and a nozzle forming groove is formed between every two adjacent projections, so that a nozzle blank can be formed, namely, two nozzle blanks can be formed at one time by adopting three lugs, and three nozzle blanks can be formed at one time by adopting four lugs, and the forming difficulty is increased correspondingly.
The nozzle blank is used as a base to form the nozzle, the nozzle blank is formed easily, and the specific forming mode can be forging or machining.
The raised strips can be arranged along the axial direction of the cylinder blank 1 or along the circumferential direction of the cylinder according to the distribution condition of the nozzle, and can be arranged along other directions, and the nozzle blank can be forged from the raised strips as long as the raised strips can be formed.
When the convex belt is an annular belt arranged around the circumferential direction of the cylinder blank 1, the step of forming the cylinder blank 1 with the annular belt is as follows:
the solid blank is placed in the bushing plate 21 for upsetting, a punch is used for forming a middle hole to form the cylinder blank 1, the core rod 33 penetrates through the middle hole of the cylinder blank 1, the blank is placed on the V-shaped anvil 32, and the flat anvil 31 is used for drawing out different diameter sections in sections to form the cylinder blank 1 with the annular band. In the process of drawing out the cylinder blank 1 with different diameter sections, the amount of materials of each section is basically determined, and the size of the subsequently formed forged piece is directly influenced, so that in order to ensure that the qualified forged piece is machined, the size of the drawn-out cylinder blank 1 is preliminarily calculated according to the size of the forged piece, and is determined after verification and optimization through numerical simulation, so that the size of the forged piece is qualified. Further, a blank having different steps may be formed by upsetting and pressing with a die. Before upsetting the solid blank bushing 21, forging and compacting a raw material steel ingot in an upsetting-drawing mode to improve the internal defects of the blank and the quality of the blank, and then performing gas cutting blanking.
Wherein the inner support structure is used for preventing the deformation of the cylinder blank 1 when the nozzle blank is formed, and the inner support structure can be a rod-shaped structure matched with the middle hole of the cylinder blank 1, but the invention preferably adopts a structure that the inner support structure comprises a core support 54 and an eight-square cross bar 53, the outer diameter of the core support 54 is matched with the inner diameter of the convex belt position of the cylinder blank 1, the core support 54 is provided with a central hole matched with the eight-square cross bar 53, and the eight-square cross bar 53 is inserted into the central hole of the core support 54. Due to the forging pressure, when the cylinder blank 1 is rotated by the eight-sided bar 53, substantially no slip occurs between the core support 54 and the cylinder blank 1, and the eight-sided bar 53 and the fitted core support 54 do not slip, so that the rotation of the cylinder blank 1 can be easily controlled by the eight-sided bar 53.
In forming the nozzle blank, it is preferable to provide a bottom support structure to improve forging stability, in addition to an internal support structure, the bottom support structure is usually adapted to the lower bottom surface of the cylinder blank 1, for example, the raised strip is an endless strip arranged circumferentially around the cylinder blank 1, when forming the nozzle blank, the cylinder blank 1 is placed on a lower forming die 55, the lower forming die 55 has a placement groove adapted to the raised strip, the raised strip of the cylinder blank 1 is placed in alignment with the placement groove of the lower die, a nozzle forming anvil 51 is disposed above the cylinder blank 1, and the nozzle forming anvil 51 is pressed down to form the nozzle blank. The nozzle forming anvil 51 and the forming lower die 55 vertically correspond to each other and interact with each other, thereby improving the stability of the nozzle blank forming.
The two sides of the nozzle forming groove of the forming anvil are actually open, when a nozzle blank is formed, materials flow towards the two sides to form convex edges and corners, so that the two sides of the nozzle blank are changed into a concave structure with a narrow middle and wide two sides, the structure not only increases the difficulty of forming the nozzle from the nozzle blank, but also can cause material waste. For this reason, the nozzle forming anvil 51 is further provided with two side baffles 52, and the distance between the two side baffles 52 is matched with the width of the convex belt; when the nozzle blank is formed, the baffle plates 52 on both sides are respectively arranged on both sides of the convex belt, and the baffle plates 52 are matched with the nozzle forming anvil 51 to form the nozzle blank. The convex block of the nozzle forming anvil 51 and the baffle plates 52 on the two sides can form a cavity with closed periphery to form a die forging effect, so that the shape of a nozzle blank can be controlled more accurately, a good foundation is provided for forming the nozzle later, the corresponding size can be controlled better, and unnecessary material waste is avoided.
The two side baffles 52 may be fixed, or even integral with the projections of the nozzle forming anvil 51, or movable, each of the two baffles 52 having the advantage that the fixed baffle 52 is simpler to design and operate, but has a relatively high preset requirement for the distribution of the forging material, whereas the movable baffles are the opposite. The fixed baffle 52 is simple in design, for example, the baffle 52 and the nozzle forming anvil 51 are directly designed as an integral structure, while for the movable baffle 52, a baffle guide rail 56 may be provided on the nozzle forming anvil 51 in the pressing direction, and the baffle 52 is mounted on the baffle guide rail 56 and moves along the baffle guide rail 56. When the nozzle blank is formed, the baffle plates 52 on both sides are firstly slid to both sides of the convex belt along the rails to limit both sides of the nozzle, and then the nozzle forming anvil 51 is pressed downwards, and the movement of the nozzle forming anvil 51 is not influenced by the baffle plates 52 because the nozzle forming anvil 51 and the baffle plates 52 are slidably connected through the rails.
The middle hole formed directly by the punch is usually smaller than the actual middle hole of the forging, so the middle hole is usually required to be reamed, and in patent document CN105033154A, the position and angle of the nozzle blank are easily changed during reaming, which causes deviation of the final forging nozzle position. In contrast, before the nozzle blank is formed, the reaming tool is used for reaming the cylinder blank 1 to enable the cylinder blank to reach the process size of the forge piece, and the defect that the angle and the position of the nozzle are changed when the nozzle is formed and then reamed is overcome. The reaming tool disclosed in the above document can be used for reaming, but the reaming effect of the reaming tool is relatively poor, so that the invention provides a preferable reaming tool, which comprises a saddle 43, a bar 42 and a reaming upper anvil 41, wherein the upper surface of the bar 42 is matched with the inner surface of the cylinder blank 1, and the lower surface of the reaming upper anvil 41 is matched with the outer surface of the cylinder blank 1; during reaming, the bar 42 penetrates through the cylinder blank 1, two ends of the bar are erected on the frame 43, the reaming upper anvil 41 is arranged above the cylinder blank 1, the cylinder blank 1 is extruded through the bar 42 and the reaming upper anvil 41, and the cylinder blank 1 is rotated to realize reaming. The tool has better reaming effect relatively, and is more favorable for controlling the wall thickness of the cylinder blank 1.
The mode of forming the nozzle by the nozzle blank can refer to the existing modes of machining forming, extrusion forging forming and the like, wherein the nozzle formed by impact extrusion has large deformation degree and good forging quality. The invention therefore preferably employs a die-extrusion nozzle in the following manner:
machining the outer diameter of the nozzle blank to enable the nozzle blank to be matched with a nozzle forming die 63, machining a positioning hole in the center of the nozzle blank, placing the nozzle blank on the nozzle forming die 63, arranging a nozzle punch 62 in the positioning hole, arranging the frame type tool 61 to penetrate through the barrel blank 1, pressing the nozzle punch 62 downwards by the frame type tool 61, and forming the nozzle of the connecting pipe. After one nozzle is formed, the next nozzle can be formed until all the nozzles are formed.
As shown in fig. 1 to 8, a preferred embodiment of the present invention includes the following steps:
firstly, after the steel ingot is heated and insulated, a clamp handle is pressed on the steel ingot, then upsetting, drawing, compacting, blank making, cutting and blanking are carried out.
Secondly, the solid blank is heated and then vertically placed in a drain pan 21, large deformation upsetting is carried out to a certain height, a part I is formed, and then punching is carried out by using a punch, as shown in figure 1.
Thirdly, the core rod 33 passes through the middle hole of the blank to be placed on the V-shaped anvil 32, and the flat anvil 31 is used for drawing. Firstly, a straight cylinder blank with a certain size is drawn out, and then parts I-IV are divided and drawn out to a cylinder blank 1 shown in figure 3.
Fourthly, the barrel blank 1 is reamed by using a reaming tool, the bumper 42 penetrates through the barrel blank 1 and is placed on the saddle 43, the reaming upper anvil 41 is used for pressing down and reaming, after the reaming upper anvil 41 is pressed once, the bumper 42 is rotated to drive the blank to rotate for a certain angle, then the reaming upper anvil 41 is pressed down for a certain amount to ream, and the diameter of the barrel blank 1 is continuously increased through multiple times of rotary pressing until the process size is reached.
Fifthly, the eight-square-beam 53 combined core support 54 penetrates through the cylinder blank 1 and is placed on a forming lower die 55, the nozzle forming anvil 51 is pressed down by a certain amount, then the eight-square-beam 53 combined core support 54 rotates to drive the cylinder blank 1 to rotate, and the nozzle forming anvil 51 presses down by a certain amount to form another adjacent nozzle of the connecting pipe until all the nozzle blanks are formed.
Sixthly, cooling the cylinder blank 1 to normal temperature, machining each pipe nozzle part, machining the diameter to phi 1, machining an inner hole phi 2 in the inner wall of the blank to be used as a positioning hole, and machining the depth h 0.
Seventhly, the processed cylinder blank 1 is heated and then placed on a nozzle forming die 63, a nozzle punch 62 is arranged in the positioning hole, the frame type tool 61 penetrates through the cylinder blank 1, the nozzle punch 62 is pressed downwards by the frame type tool 61, and a connecting pipe nozzle is formed. One connecting pipe nozzle can be formed by impact extrusion each time, and the cylinder blank 1 can be continuously rotated to the next connecting pipe nozzle until all the nozzles are formed.
Claims (9)
1. The profiling forging process of the integrated pipe connecting section forge piece is characterized by comprising the following steps of:
forging the blank into a cylindrical blank (1) with a convex belt;
arranging an internal supporting structure at a position corresponding to a convex belt of a cylinder blank (1), forming a nozzle blank on the convex belt by using a nozzle forming anvil (51), wherein the nozzle forming anvil (51) is provided with at least two forming lugs, a nozzle forming groove is formed between two adjacent forming lugs, and the forming lugs are extruded to align the convex belt of the cylinder blank (1) to form the nozzle blank;
forming a nozzle on the basis of the nozzle blank;
before forming the nozzle blank, a hole expanding tool is used for expanding the cylinder blank (1) to reach the process size of a forge piece.
2. The profiling forging process of the integrated pipe joint segment forging piece as claimed in claim 1, wherein the raised belt is an annular belt arranged circumferentially around the cylinder blank (1), and the step of forming the cylinder blank (1) with the annular belt is as follows:
the solid blank is placed in a bushing (21) for upsetting, a punch is used for forming a middle hole to form a barrel blank (1), a core rod (33) penetrates through the middle hole of the barrel blank (1), the blank is placed on a V-shaped anvil (32), and sections with different diameters are drawn out by sections by using a flat anvil (31) to form the barrel blank (1) with an annular band.
3. The profiling forging process of the integrated pipe joint section forging piece as claimed in claim 2, wherein the size of the drawn and formed cylinder blank (1) is preliminarily calculated according to the size of the forging piece, and is determined after verification and optimization through numerical simulation.
4. The profiling forging process of the integrated extension pipe section forging piece as claimed in claim 1, wherein the protruding belt is an endless belt arranged around the circumferential direction of the barrel blank (1), the barrel blank (1) is placed on a forming lower die (55) when the nozzle blank is formed, a placing groove matched with the protruding belt is formed in the forming lower die (55), the protruding belt of the barrel blank (1) is placed in alignment with the placing groove of the lower die, a nozzle forming anvil (51) is arranged above the barrel blank (1), and the nozzle forming anvil (51) is pressed downwards to form the nozzle blank.
5. The profiling forging process of the integrated pipe joint section forging piece as claimed in claim 1, wherein the nozzle forming anvil (51) is further provided with two side baffles (52), and the distance between the two side baffles (52) is matched with the width of the convex belt;
when the nozzle blank is formed, baffle plates (52) at two sides are respectively arranged at two sides of the convex belt, and the baffle plates (52) are matched with a nozzle forming anvil (51) to form the nozzle blank.
6. The profiling forging process of the integrated pipe connecting section forging piece as claimed in claim 5, wherein a baffle guide rail (56) is arranged on the nozzle forming anvil (51) along the pressure direction, and the baffle (52) is mounted on the baffle guide rail (56) and moves along the baffle guide rail (56);
when forming the nozzle blank, firstly, the baffle plates (52) on the two sides slide to the two sides of the convex belt along the track, and then the nozzle blank is extruded and formed by the nozzle forming anvil (51).
7. The profiling forging process of the integrated pipe joint forging piece as claimed in claim 1, wherein the reaming tool comprises a horse frame (43), a horse bar (42) and a reaming upper anvil (41), the upper surface of the horse bar (42) is matched with the inner surface of the cylinder blank (1), and the lower surface of the reaming upper anvil (41) is matched with the outer surface of the cylinder blank (1);
during reaming, the cross bar (42) penetrates through the cylinder blank (1), the two ends of the cross bar are erected on the trestle (43), the reaming upper anvil (41) is arranged above the cylinder blank (1), the cylinder blank (1) is extruded through the cross bar (42) and the reaming upper anvil (41), and the cylinder blank (1) is rotated to realize reaming.
8. The profiling forging process of the integrated pipe joint forging piece as claimed in claim 1, wherein the internal supporting structure comprises a core support (54) and an eight-square-shaped cross bar (53), the outer diameter of the core support (54) is matched with the inner diameter of the position of the protruding belt of the barrel blank (1), the core support (54) is provided with a central hole matched with the eight-square-shaped cross bar (53), and the eight-square-shaped cross bar (53) is inserted into the central hole of the core support (54).
9. The process for profiling forging an integrated piping segment forging according to claim 1, wherein the step of forming the nozzle on the basis of the nozzle blank is as follows:
machining the outer diameter of the nozzle blank to enable the nozzle blank to be matched with a nozzle forming die (63), machining a positioning hole in the center of the nozzle blank, placing the nozzle blank on the nozzle forming die (63), arranging a nozzle punch head (62) in the positioning hole, enabling the frame type tool (61) to penetrate through the barrel blank (1), and enabling the frame type tool (61) to press the nozzle punch head (62) downwards to form the nozzle of the connecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810637283.9A CN108705023B (en) | 2018-06-20 | 2018-06-20 | Profiling forging process for integrated pipe joint section forge piece |
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| CN201810637283.9A CN108705023B (en) | 2018-06-20 | 2018-06-20 | Profiling forging process for integrated pipe joint section forge piece |
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| CN108705023B true CN108705023B (en) | 2020-09-01 |
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| CN109500333B (en) * | 2019-01-16 | 2020-07-17 | 山东大学 | Large ring piece reaming forging forming method with inner flange |
| CN113878075B (en) * | 2021-10-18 | 2023-08-25 | 二重（德阳）重型装备有限公司 | Profiling forging process for large variable-section cylinder body integrated with multiple connecting pipes |
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| CN101564750A (en) * | 2009-04-17 | 2009-10-28 | 二重集团（德阳）重型装备股份有限公司 | Process and device for forming straight-edge conical cylinder forged piece of nuclear power evaporator |
| CN101913058A (en) * | 2010-07-23 | 2010-12-15 | 莫亚夫 | Blank-making rolling method for synchronous sliding sleeve of automotive transmission |
| CN102921764A (en) * | 2012-07-10 | 2013-02-13 | 清华大学 | Molding method and molding apparatus for pipe structure having nozzle boss |
| CN103143659A (en) * | 2013-03-21 | 2013-06-12 | 通裕重工股份有限公司 | Hollow forging method of nuclear power main pipeline |
| CN105033154A (en) * | 2015-07-22 | 2015-11-11 | 中国第一重型机械股份公司 | Integral forging method for integrated connecting pipe section with connecting pipe and flange |
| CN104972052A (en) * | 2015-07-31 | 2015-10-14 | 四川工程职业技术学院 | Forging method for pipe nozzle bosses of nuclear power main pipeline blank |
| CN105033132A (en) * | 2015-09-19 | 2015-11-11 | 中国第一重型机械股份公司 | Hollow forging piece profiling forging method of overlong-asymmetric-pipe-mouth-contained reactor coolant piping |
| CN106051721A (en) * | 2016-06-03 | 2016-10-26 | 上海新闵（东台）重型锻造有限公司 | Pressure vessel integrated end socket for nuclear power, end socket plate blank of pressure vessel integrated end socket and forging method of pressure vessel integrated end socket |
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| CN108705023A (en) | 2018-10-26 |
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