CN114871421A

CN114871421A - Positioning casting device for steam turbine cylinder and positioning casting process thereof

Info

Publication number: CN114871421A
Application number: CN202210523166.6A
Authority: CN
Inventors: 杨建�; 曹峤; 郭锐; 杨茂海; 朱玮
Original assignee: Jiangsu Wanheng Casting Industry Co ltd
Current assignee: Jiangsu Wanheng Casting Industry Co ltd
Priority date: 2022-05-13
Filing date: 2022-05-13
Publication date: 2022-08-09
Also published as: CN115625322B; CN115625322A

Abstract

The invention discloses a positioning casting device for a steam turbine cylinder and a positioning casting process thereof, and relates to the technical field of positioning casting of the steam turbine cylinder. According to the invention, the forming mechanism is used for replacing manpower to open the forming die by hands for taking out the blank, so that the phenomenon that the residual temperature of the blank brings strong roasting feeling to workers is avoided, the T-shaped ejector rod rotates in the inserting hole of the supporting plate, the forming die can be turned to the lower part, the height of the forming die is reduced, the blank is prevented from being damaged due to the fact that the blank is not clamped and dropped in the manual blank taking process, and the next process is conveniently carried out.

Description

Positioning casting device for steam turbine cylinder and positioning casting process thereof

Technical Field

The invention relates to the technical field of positioning casting of a steam turbine cylinder, in particular to a positioning casting device for the steam turbine cylinder and a positioning casting process thereof.

Background

The steam turbine cylinder is cast, when the steam turbine cylinder is cast, generally, metal liquid is poured into a casting cavity, a part or a blank required by a user is formed after the metal liquid is cooled, then the part or the blank is taken out manually, the blank is still warm after being cooled, a forming die is opened by hands to take out the part, the remaining temperature of the blank brings a strong roasting feeling to workers, and the blank is not clamped and falls off in the process of being taken out from the cavity, so that the blank is damaged, and the next process cannot be carried out.

Disclosure of Invention

The present invention is directed to a positioning and casting device for a steam turbine cylinder and a positioning and casting process thereof, so as to solve the problems of the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a positioning casting device for a steam turbine cylinder comprises a forming mechanism for forming the steam turbine cylinder, and the forming mechanism is used for carrying out forming operation on the steam turbine cylinder.

Forming mechanism includes two backup pads, the upper end of two backup pads all has T type ejector pin through pegging graft of spliced eye horizontal slip, the one end that two T type ejector pins are close to each other is all fixed and is equipped with spherical seat, the outer wall symmetry of spherical seat is equipped with two hinge bars, the tip of one of them hinge bar of spherical seat articulates there is forming die, the one end that the hinge bar was kept away from to two forming die is articulated, through all having seted up the shaping chamber at two forming die, with two T type ejector pins respectively along the inside one side horizontal slip that closes together each other of spliced eye of two backup pads, two spherical seats drive two forming die through the hinge bar and overturn around articulated position, the shaping chamber opening up to two forming die is just to the laminating, form confined shaping cavity, a shaping operation for steam turbine cylinder blank.

The tip of another hinge bar of spherical seat articulates there is the articulated slab, the one end that the hinge bar was kept away from to two articulated slabs is passed through the connecting rod and is articulated, through two articulated slabs with articulated together around the upset of hinge position, be about to two articulated slabs to the one side adjustment of keeping away from each other, can drive two T type ejector pins respectively through two spherical seats and slide to one side horizontal slip of keeping away from each other along the spliced eye inside of two backup pads, thereby can assist two attached forming die together to strut to the one side of keeping away from each other around hinge position, it carries out the drawing of patterns operation to need not the staff from person's contact forming die, make the staff can keep away from the steam turbine cylinder of just drawing of patterns.

The outer wall of T type ejector pin slides and cup joints the spring that is located between ball type seat and the backup pad, utilizes the elasticity of spring, can be with T type ejector pin along the inside real-time jack-up of spliced eye for the ball type seat of two T type ejector pin tip can be in the same place in real time laminating, ensures that two forming die's shaping chamber opening can be accurate just right, ensures effectively going on of shaping operation.

In further embodiment, the mounting groove has been seted up to two articulated slab relative lateral walls, the inside of mounting groove is rotated a plurality of installation trays that are located the mounting groove through the round pin axle, the one end that the round pin axle was kept away from to the installation tray is equipped with the brush of protrusion mounting groove, rotate to strut when two forming die, rotate the adjustment to being close a style of calligraphy structure distribution from the laminating together, two articulated slab rotate the adjustment to being close a style of calligraphy structure simultaneously, and simultaneously, can make two forming die's shaping chamber just right with the brush of every installation tray like this, as long as rotate every installation tray, just can drive the brush and clear up the operation to forming die's shaping chamber, until clean totally.

The hinged plate can avoid workers from directly rotating the two forming dies to perform demoulding operation, and can adjust the hairbrush on the side wall of the mounting disc into the forming cavity of the forming dies to perform cleaning operation.

In a further embodiment, the outer wall of one end, close to the pin shaft, of each mounting disc is fixedly sleeved with a first fluted disc, two adjacent mounting discs in the same mounting groove are meshed through the two first fluted discs, and as long as any one mounting disc in the same mounting groove is rotated, the two adjacent first fluted discs can be meshed through the two adjacent first fluted discs, so that power transmission is realized, synchronous rotation of all the mounting discs is realized, and the cleaning efficiency inside the forming cavity of the forming die is improved.

In a further embodiment, a pin shaft of a mounting plate close to one end of the hinged positions of the two hinged plates in the mounting groove is rotatably penetrated through the mounting groove and is fixedly connected with a second fluted disc, a limiting rod is rotatably arranged on the side wall of the connecting rod at the hinged positions of the two hinged plates, a third fluted disc is fixedly sleeved on the outer wall of the limiting rod and is meshed with the second fluted disc, when the two hinged plates rotate around the hinged positions of the hinged plates, the two hinged plates are simultaneously opened towards the sides away from each other until the hinged plates are adjusted to be close to a linear structure, meanwhile, the pin shaft which rotates and extends to the outer sides of the hinged plates is meshed with the third fluted disc on the outer wall of the limiting rod through the second fluted disc, the third fluted disc can be driven to rotate only by manually rotating the limiting rod, the rotating third fluted disc can drive the second fluted discs at the two sides to synchronously rotate, the corresponding mounting plates can be driven to synchronously rotate through the pin shaft and are driven through the first fluted disc, can realize that all mounting discs rotate in step, further improve forming die's the efficiency of the inside impurity in die cavity.

In a further embodiment, a supporting mechanism capable of supporting the forming mechanism is arranged below the forming mechanism, and the forming mechanism is stably supported by the supporting mechanism, so that the forming mechanism can perform forming operation conveniently, and demolding and cleaning operation after demolding are performed simultaneously.

The supporting mechanism comprises two backup plates which are distributed in parallel, the two backup plates are respectively vertically fixed with the upper end surfaces of the two backup plates, the two ends of the bottom end of each backup plate are respectively and vertically fixed with supporting legs, the four supporting legs are utilized to support the two backup plates, and the whole forming mechanism is supported in the air.

The bottom of the outer wall of the supporting leg is fixedly sleeved with a supporting cross rod, a tray is fixedly arranged between the end parts of the four supporting cross rods, the upper end of the tray is rotatably provided with a limiting seat, a torsional spring is arranged at the rotating part to rotate the T-shaped ejector rod along the inside of the inserting hole, meanwhile, the T-shaped ejector rod slides along the inside of the splicing hole until the openings of the forming cavities of the two forming molds are opposite to and attached, the limiting rod can be overturned to the upper part of the tray, meanwhile, the side wall of the limiting seat is provided with a clamping notch clamped with the end part of the limiting rod, the limiting seat rotates around the upper end surface of the tray, the torsion spring generates torsional potential energy, so that the clamping notch of the limiting seat can be just opposite to the end part of the limiting rod, then the end part of the limit rod is clamped into the clamping notch, then the limit seat is reversely rotated on the upper end surface of the tray by utilizing the torsional potential energy of the torsion spring, thereby make T type ejector pin unable upset in the spliced eye for two gag lever post positions no longer take place the upset operation.

In further embodiment, the spacing groove has been seted up to the radial lateral wall of inside bottom of joint breach, the fixed spacing fixture block that is equipped with the inside joint of spacing groove of the tip radial lateral wall of gag lever post, after in the joint breach of spacing seat is gone into to the gag lever post card, spacing fixture block goes into the inside spacing inslot of joint breach simultaneously, spacing seat is when the tray up end rotates, spacing fixture block rotates at spacing inslot portion, avoid the gag lever post to break away from the joint breach along joint breach axial direction like this, thereby avoid two T type ejector pins along the inside reverse horizontal slip of spliced eye, just so can avoid two forming die to overturn around articulated position is reverse, lead to two forming die to strut to the rotation of one side of keeping away from each other, cause the error to appear in the forming process.

In a further embodiment, a handle is fixedly arranged on the radial side wall of the limiting seat, the handle is held by bare hands, force application is facilitated to rotate the limiting seat around the rotating position, and the clamping notch of the limiting seat is in dead-against clamping with the limiting rod.

Preferably, the positioning casting process based on the positioning casting device for the steam turbine cylinder comprises the following steps:

a1, forming cavities are formed in opposite side walls of two forming dies, two T-shaped ejector rods horizontally slide towards the side where the two T-shaped ejector rods are mutually closed along the insides of the inserting holes of the two supporting plates respectively, and the two spherical seats drive the two forming dies to turn around the hinged position through the hinged rods until the openings of the forming cavities of the two forming dies are just opposite to each other to be attached, so that a closed forming cavity is formed and is used for forming operation of a steam turbine cylinder blank;

a2, through two articulated sheets that will articulate together around the upset of hinge position, be about to two articulated sheets to the one side adjustment of keeping away from each other, can drive two T type ejector pins respectively through two ball type seats along the spliced eye inside of two backup pads to the one side horizontal slip of keeping away from each other to can assist two forming die that the laminating is in the same place to strutting to the one side of keeping away from each other around hinge position, need not the staff and contact forming die in person and carry out the operation of drawing of patterns, make the staff can keep away from the steam turbine cylinder of just drawing of patterns.

Compared with the prior art, the invention has the beneficial effects that:

the invention relates to a positioning casting device for a steam turbine cylinder and a positioning casting process thereof.A forming mechanism performs forming operation on the steam turbine cylinder, separates two T-shaped ejector rods towards one side away from each other after forming is finished, can separate two forming dies to realize demoulding operation, replaces manpower to open the forming dies by bare hands to perform workpiece taking operation, avoids strong roasting feeling of blank residual temperature to workers, rotates the T-shaped ejector rods in inserting holes of a supporting plate, can overturn the forming dies to the lower part, reduces the height of the forming dies, and avoids blank damage caused by unclamping and dropping in the next workpiece taking process during demoulding, so that the next process is facilitated, and the processing efficiency is improved.

Drawings

FIG. 1 is a schematic view of the main structure of the present invention;

FIG. 2 is a schematic structural diagram of the supporting mechanism of the present invention;

FIG. 3 is a half-sectional view of the spacing block of the present invention;

FIG. 4 is a top sectional view of the stop lever and the stop block of the present invention;

FIG. 5 is a half sectional view of a hinge plate of the present invention;

FIG. 6 is an enlarged view of the structure of FIG. 1 at A in accordance with the present invention;

FIG. 7 is a partial exploded view of the forming mechanism of the present invention;

fig. 8 is an enlarged view of the structure at B in fig. 1 according to the present invention.

In the figure: 1. a support mechanism; 11. supporting legs; 12. a backup plate; 13. a support rail; 14. a tray; 15. A limiting seat; 16. a handle; 2. a molding mechanism; 21. a support plate; 22. a T-shaped ejector rod; 23. a ball-shaped seat; 24. forming a mold; 25. a hinge plate; 26. a limiting rod; 27. a second fluted disc; 28. a third fluted disc; 29. a spring; 210. a brush; 211. a limiting clamping block; 212. a pin shaft; 213. mounting a disc; 214. A first toothed disc.

Detailed Description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1, 6 and 8, the present embodiment provides a positioning casting device for a steam turbine cylinder and a positioning casting process thereof, including a forming mechanism 2 for forming the steam turbine cylinder, and the forming mechanism 2 is used for performing a forming operation on the steam turbine cylinder.

The forming mechanism 2 comprises two support plates 21, T-shaped ejector rods 22 are inserted at the upper ends of the two support plates 21 through insertion holes in a horizontal sliding manner, spherical seats 23 are fixedly arranged at the ends, close to each other, of the two T-shaped ejector rods 22, two hinge rods are symmetrically arranged on the outer walls of the spherical seats 23, a forming mold 24 is hinged to the end portion of one hinge rod of the spherical seat 23, one ends, far away from the hinge rods, of the two forming molds 24 are hinged, through having all seted up the shaping chamber at two forming die 24 relative lateral walls, with two T type ejector pins 22 respectively along the inside one side horizontal slip that closes together each other of spliced eye of two backup pads 21, two ball type seats 23 drive two forming die 24 through the hinge bar and overturn around articulated position, until two forming die 24's shaping chamber openings just to laminating, form confined shaping cavity for the shaping operation of steam turbine cylinder blank.

After the blank of the steam turbine cylinder is formed, the two forming dies 24 are separated to perform the demoulding operation, but the blank has residual heat after being cooled, the forming dies 24 are opened by bare hands to take out the blank, the residual heat of the blank brings strong roasting feeling to workers, therefore, the end part of the other hinge rod of the spherical seat 23 is hinged with the hinge plate 25, one ends of the two hinge plates 25 far away from the hinge rod are hinged through the connecting rod, the two hinge plates 25 hinged together are turned around the hinge position, namely the two hinge plates 25 are adjusted to the sides far away from each other, the two T-shaped ejector rods 22 can be respectively driven by the two spherical seats 23 to horizontally slide to the sides far away from each other along the inside of the inserting holes of the two supporting plates 21, so that the two forming dies 24 attached together can be propped open to the sides far away from each other around the hinge position, and the workers do not need to contact the forming dies 24 to perform the demoulding operation by themselves, so that the worker can be far away from the steam turbine cylinder which is just demolded.

In addition, in the drawing of patterns process, in the process of taking out from the chamber, steam turbine blank directly drops, will lead to the blank to damage, can 'T carry out technology on next step, in order to avoid causing the damage of blank, with T type ejector pin 22 at the spliced eye internal rotation of backup pad 21, can overturn forming die 24 to the below, reduce forming die 24's height, be close ground or accept the receipts material platform of blank, when the drawing of patterns like this, avoid the artificial piece of getting in-process not press from both sides tightly and drop and lead to the blank to damage, reduce the defective rate.

In order to ensure that the two forming molds 24 are separated randomly in the forming process, the forming cavities of the two forming molds 24 cannot be closed, and a blank cannot be formed, the spring 29 positioned between the spherical seat 23 and the supporting plate 21 is sleeved on the outer wall of the T-shaped ejector rod 22 in a sliding manner, the T-shaped ejector rod 22 can be jacked up along the inside of the inserting hole in real time by utilizing the elasticity of the spring 29, the spherical seats 23 at the end parts of the two T-shaped ejector rods 22 can be attached together in real time, the openings of the forming cavities of the two forming molds 24 can be accurately aligned, and the effective forming operation is ensured.

Other limiting parts can be adopted, so long as the requirement on the forming process is met, the openings of the forming cavities of the two forming molds 24 can be just attached in real time, and the forming cavities of the two forming molds 24 are ensured to be in a relatively closed state, so that the blank is packaged to be formed, and the increase of the defective rate is avoided.

Example two

Please refer to fig. 1, fig. 5, fig. 6 and fig. 7, which are further improved based on embodiment 1:

in case after the drawing of patterns of steam turbine cylinder, dust or other foreign particles are easily remained in the shaping intracavity of two forming die 24, when carrying out the shaping operation once more, easily lead to the blank surface after the shaping to have the pothole phenomenon, need the later stage retreatment, influence the production efficiency of finished product steam turbine cylinder, consequently all need clean the shaping intracavity before casting at every turn, consume man-hour, influence the production efficiency of finished product steam turbine cylinder equally.

Through having seted up the mounting groove at two articulated slab 25 relative lateral walls, the inside of mounting groove is rotated a plurality of installation dish 213 that is located the mounting groove through round pin axle 212, the one end that round pin axle 212 was kept away from to installation dish 213 is equipped with the brush 210 of protrusion mounting groove, rotate to strut when two forming die 24, rotate the adjustment to being close a style of calligraphy structure distribution together from the laminating, two articulated slab 25 rotate the adjustment to being close a style of calligraphy structure simultaneously, and simultaneously, can make the shaping chamber of two forming die 24 just right with the brush 210 of every installation dish 213 like this, as long as rotate every installation dish 213, just can drive brush 210 and clear up the operation to the shaping chamber of forming die 24, until clean totally.

The hinged plate 25 not only can prevent the worker from directly rotating the two forming dies 24 to perform the demolding operation, but also can adjust the brush 210 on the side wall of the mounting plate 213 to the forming cavity of the forming die 24 to perform the cleaning operation.

In order to synchronously rotate all the mounting discs 213, thereby improving the cleaning efficiency, the outer wall of one end of the mounting disc 213, which is close to the pin shaft 212, is fixedly sleeved with a first fluted disc 214, two adjacent mounting discs 213 in the same mounting groove are meshed with each other through the two first fluted discs 214, and as long as any one mounting disc 213 in the same mounting groove is rotated, the two adjacent first fluted discs 214 can be meshed with each other, so that the power transmission is realized, the synchronous rotation of all the mounting discs 213 is realized, and the cleaning efficiency in the forming cavity of the forming die 24 is improved.

How to rotate all the mounting discs 213 in the two mounting grooves synchronously and further improve the cleaning efficiency, a pin shaft 212 of one mounting disc 213 close to one end of the hinged position of the two hinged plates 25 in the mounting groove rotates to penetrate through the mounting groove, the second toothed disc 27 is fixedly connected with the mounting groove, a limiting rod 26 is rotatably arranged on the side wall of the connecting rod at the hinged position of the two hinged plates 25, a third toothed disc 28 is fixedly connected to the outer wall of the limiting rod 26 in a fixed mode, the third toothed disc 28 is meshed with the second toothed disc 27, when the two hinged plates 25 rotate around the hinged position with the hinged plates, the two hinged plates 25 are simultaneously propped open towards the side away from each other until the side is adjusted to be close to a linear structure, and meanwhile, the pin shaft 212 which rotates to extend to the outer side of the hinged plates 25 is meshed with the third toothed disc 28 on the outer wall of the limiting rod 26 through the second toothed disc 27.

As long as bare-handed rotation gag lever post 26 can drive third fluted disc 28 and rotate, and pivoted third fluted disc 28 can drive both sides second fluted disc 27 synchronous rotation, can drive the synchronous rotation of the mounting disc 213 that corresponds through round pin axle 212, through the transmission of first fluted disc 214, can realize that all mounting discs 213 rotate in step, further improves the efficiency of forming die 24's the inside impurity in shaping chamber.

EXAMPLE III

Referring to fig. 1-4, a further improvement is made on the basis of embodiment 2:

in order to stably support the forming mechanism 2, a supporting mechanism 1 capable of supporting the forming mechanism 2 is arranged below the forming mechanism 2, and the forming mechanism 2 is stably supported by the supporting mechanism 1, so that the forming mechanism 2 can conveniently perform forming operation and simultaneously perform demoulding and cleaning operation after demoulding.

The supporting mechanism 1 comprises two backup plates 12 which are distributed in parallel, the two supporting plates 21 are respectively vertically fixed to the upper end surfaces of the two backup plates 12, the supporting legs 11 are respectively and vertically fixed to the two ends of the bottom end of each backup plate 12, the four supporting legs 11 are utilized to support the two backup plates 12, and the whole forming mechanism 2 is supported in the air.

In order to ensure that two forming dies 24 of the forming mechanism 2 cannot be separated randomly in the forming process to cause that a steam turbine cylinder cannot be formed, the bottom end of the outer wall of a supporting leg 11 is fixedly sleeved with a supporting cross rod 13, a tray 14 is fixedly arranged between the end parts of four supporting cross rods 13, a limiting seat 15 is rotatably arranged at the upper end of the tray 14, a torsion spring is arranged at the rotating position, a T-shaped ejector rod 22 rotates along the inside of an inserting hole, the T-shaped ejector rod 22 also slides along the inside of the inserting hole until the forming cavity openings of the two forming dies 24 are just opposite to each other, a limiting rod 26 can be turned over to the upper part of the tray 14, a clamping gap clamped with the end part of a limiting rod 26 is formed in the side wall of the limiting seat 15, the limiting seat 15 rotates around the upper end face of the tray 14, the torsion spring generates torsion potential energy to enable the clamping gap of the limiting seat 15 to be just opposite to the end part of the limiting rod 26, and then the end part of the limiting rod 26 is clamped into the clamping gap, then, the limiting seat 15 is rotated reversely on the upper end face of the tray 14 by utilizing the torsional potential energy of the torsion spring, so that the T-shaped top rod 22 cannot be turned in the inserting hole, and the turning operation does not occur at the positions of the two limiting rods 26.

In addition, the spacing groove has been seted up at the radial lateral wall of inside bottom in joint breach, the fixed spacing fixture block 211 with the inside joint of spacing groove that is equipped with of the radial lateral wall of tip of gag lever post 26, after gag lever post 26 blocks into in spacing seat 15's the joint breach, spacing fixture block 211 blocks into the inside spacing groove of joint breach simultaneously, spacing seat 15 rotates when tray 14 up end, spacing fixture block 211 rotates at spacing inslot portion, avoid gag lever post 26 to break away from the joint breach along joint breach axial direction like this, thereby avoid two T type ejector pins 22 along the inside reverse horizontal slip of spliced eye, just so can avoid two forming die 24 to overturn around articulated position is reverse, lead to two forming die 24 to rotate to the one side of keeping away from each other and strut, cause the error to appear in the forming process.

The handle 16 is fixedly arranged on the radial side wall of the limiting seat 15, the handle 16 is held by bare hands, force application is facilitated to rotate the limiting seat 15 around the rotating position, and the clamping notch of the limiting seat 15 is just clamped with the limiting rod 26.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A positioning and casting device for a steam turbine cylinder comprises a forming mechanism (2) for forming the steam turbine cylinder, and is characterized in that: the forming mechanism (2) comprises two supporting plates (21), T-shaped ejector rods (22) are horizontally inserted into the upper ends of the two supporting plates (21) in a sliding and inserting mode through inserting holes, spherical seats (23) are fixedly arranged at the ends, close to each other, of the two T-shaped ejector rods (22), two hinge rods are symmetrically arranged on the outer wall of each spherical seat (23), a forming die (24) is hinged to the end portion of one hinge rod of each spherical seat (23), one ends, far away from the hinge rods, of the two forming dies (24) are hinged, and forming cavities are formed in the opposite side walls of the two forming dies (24);

the end part of the other hinge rod of the spherical seat (23) is hinged with a hinge plate (25), and one ends of the two hinge plates (25) far away from the hinge rods are hinged through a connecting rod;

the outer wall of the T-shaped ejector rod (22) is sleeved with a spring (29) between the spherical seat (23) and the support plate (21) in a sliding mode.

2. The alignment casting apparatus for steam turbine cylinders according to claim 1, wherein: mounting grooves are formed in opposite side walls of the two hinge plates (25), a plurality of mounting discs (213) located in the mounting grooves are rotated in the mounting grooves through hinge pins (212), and brushes (210) protruding out of the mounting grooves are arranged at one ends, far away from the hinge pins (212), of the mounting discs (213).

3. The alignment casting apparatus for steam turbine cylinders according to claim 2, wherein: the outer wall of one end, close to the pin shaft (212), of each mounting disc (213) is fixedly sleeved with a first fluted disc (214), and two adjacent mounting discs (213) in the same mounting groove are meshed through the two first fluted discs (214).

4. A positional casting apparatus for a steam turbine cylinder according to claim 3, wherein: round pin axle (212) of a mounting disc (213) of inside being close to two articulated slab (25) hinge position one end of mounting groove are rotated and are run through the mounting groove, and fixedly connected with second fluted disc (27), and the connecting rod lateral wall of two articulated slab (25) hinge position rotates and is equipped with gag lever post (26), the outer wall of gag lever post (26) is fixed to be cup jointed third fluted disc (28), third fluted disc (28) and second fluted disc (27) meshing.

5. The apparatus of claim 1 wherein the casting assembly comprises: a supporting mechanism (1) capable of supporting the forming mechanism (2) is arranged below the forming mechanism (2);

the supporting mechanism (1) comprises two backup plates (12) which are distributed in parallel, and the two supporting plates (21) are respectively vertically and fixedly provided with the upper end faces of the two backup plates (12).

6. The alignment casting apparatus for steam turbine cylinders according to claim 5, wherein: supporting legs (11) are vertically and fixedly arranged at two ends of the bottom end of the backup plate (12), supporting cross rods (13) are fixedly sleeved at the bottom ends of the outer walls of the supporting legs (11), trays (14) are fixedly arranged between the end parts of the four supporting cross rods (13), limiting seats (15) are rotatably arranged at the upper ends of the trays (14), and torsional springs are arranged at the rotating positions;

the side wall of the limiting seat (15) is provided with a clamping gap clamped with the end part of the limiting rod (26).

7. The alignment casting apparatus for steam turbine cylinders according to claim 6, wherein: the radial lateral wall of inside bottom of joint breach has seted up the spacing groove, the fixed spacing fixture block (211) with the inside joint of spacing groove that is equipped with of the radial lateral wall of tip of gag lever post (26).

8. The alignment casting apparatus for steam turbine cylinders according to claim 6, wherein: and a handle (16) is fixedly arranged on the radial side wall of the limiting seat (15).

9. A casting process of a positioning casting device for a steam turbine cylinder, using the positioning casting device for a steam turbine cylinder according to claim 1, comprising the steps of:

a1, forming cavities are formed in opposite side walls of two forming molds (24), two T-shaped ejector rods (22) horizontally slide towards the sides which are mutually closed along the insides of inserting holes of two supporting plates (21), two spherical seats (23) drive the two forming molds (24) to turn around a hinged position through a hinged rod until openings of the forming cavities of the two forming molds (24) are just opposite to each other to be attached, and a closed forming cavity is formed and used for forming operation of a steam turbine cylinder blank;

a2, through two articulated sheets (25) that will articulate together around the upset of hinge position, be about two articulated sheets (25) to the one side adjustment of keeping away from each other, can drive two T type ejector pins (22) respectively through two ball type seats (23) and prop to the one side horizontal slip of keeping away from each other along the spliced eye inside of two backup pads (21), thereby can assist and strut two forming die (24) that the laminating is in the same place to the one side of keeping away from each other around hinge position, need not that the staff from oneself and contact forming die (24) and carry out the drawing of patterns operation, make the staff can keep away from the steam turbine cylinder of just drawing of patterns.