CN119407007A - Indexable water bulge forming hydraulic press - Google Patents

Abstract

The present application belongs to the field of hydraulic forming technology, and provides an indexable water expansion forming hydraulic press, including a bottom plate, a top plate, a turntable, a mold, a driving mechanism and a high-pressure water pipe. Among them, the top plate and the bottom plate are spaced apart; the turntable is rotatably mounted on the bottom plate and arranged between the top plate and the bottom plate; the mold includes a lower mold and an upper mold arranged in pairs, the lower mold is connected to the turntable and symmetrically arranged about the rotation center axis of the turntable, the upper mold abuts against the side of the lower mold away from the turntable in a direction perpendicular to the turntable and cooperates with the lower mold to form a cavity for forming a target product; the driving mechanism includes a lifting electric cylinder and a clamping cylinder respectively connected to the top plate, and also includes a pressure head connected to the clamping cylinder and can be driven by the clamping cylinder, the lifting electric cylinder and the clamping cylinder are also symmetrically arranged about the rotation center axis of the turntable; the high-pressure water pipe is connected to the cavity and is used to inject high-pressure water into the cavity.

Description

Indexable water bulge forming hydraulic press

Technical Field

The application belongs to the technical field of hydraulic forming, and particularly relates to an indexable water bulge forming hydraulic machine.

Background

Conventional hydraulic water bulge forming presses typically employ a single-station mode of operation, i.e., the entire process of material loading, water bulge forming, product removal, and reloading is accomplished at a single fixed location. This mode of operation presents a significant efficiency bottleneck, namely the time to wait for material loading and unloading can significantly reduce the overall forming efficiency of the apparatus and limit the throughput of the production line. Therefore, there is a need to solve the above-mentioned technical problems.

Disclosure of Invention

The embodiment of the application aims to provide an indexable water bulge forming hydraulic press so as to solve the technical problem of lower water bulge forming efficiency in the prior art.

In order to achieve the purpose, the application adopts the technical scheme that the indexable water expansion forming hydraulic press comprises:

A bottom plate;

The top plate is arranged at intervals with the bottom plate;

the turntable is rotatably arranged on the bottom plate and is arranged between the top plate and the bottom plate;

the upper die is abutted to one side, far away from the turntable, of the lower die along the direction perpendicular to the turntable and is matched with the lower die to form a cavity for forming a target product;

The driving mechanism comprises a lifting electric cylinder and a mold locking cylinder which are respectively connected to the top plate, and further comprises a pressure head which is connected to the mold locking cylinder and can be driven by the mold locking cylinder, wherein the power end of the lifting electric cylinder is detachably connected to the upper mold and can drive the upper mold to approach or depart from the lower mold along the direction vertical to the turntable, the moving path of the pressure head is vertical to the turntable and interferes with the rotating path of the upper mold, and the lifting electric cylinder and the mold locking cylinder are symmetrically arranged about the rotating center axis of the turntable;

And the high-pressure water pipe is communicated with the cavity and is used for filling high-pressure water into the cavity.

Optionally, the driving mechanism further comprises a lifting sliding block connected to the upper die and a pulling seat connected to the power end of the lifting electric cylinder;

The lifting sliding block is provided with a T-shaped groove extending along an arc-shaped path, the T-shaped groove extends in a plane parallel to the turntable and is coaxially arranged with the turntable, all T-shaped grooves on the lifting sliding block are positioned on the same circumference path, and the pulling seat is connected with a T-shaped block which is adaptive to the T-shaped groove in shape and can pass through the T-shaped groove or stop in the T-shaped groove.

Optionally, the driving mechanism further comprises a pressing plate detachably connected to the lifting sliding block and used for being abutted against the pressing head.

Optionally, the driving mechanism further comprises a rotating bracket coaxially connected with the turntable;

and a linear rail which is in sliding connection with the lifting sliding block is formed on the rotary support.

Optionally, the driving mechanism further comprises a guide rod connected to the pulling seat;

The guide rod penetrates through the top plate and is connected with the top plate in a sliding mode, and the extending direction of the wire rail is parallel to the sliding direction of the guide rod relative to the top plate.

Optionally, the driving mechanism further comprises a plurality of upright posts connected between the bottom plate and the top plate;

The upright posts are perpendicular to the turntable and distributed in a triangular shape, and the rotary support is coaxially and movably sleeved on one upright post;

The other upright posts are located outside the maximum profile of the turntable.

Optionally, the driving mechanism further comprises a mold locking slider slidingly connected to the upright post;

The pressure head is connected to the mode locking sliding block and is connected to the mode locking oil cylinder through the mode locking sliding block.

Optionally, the indexable water bulge forming hydraulic press further comprises a bearing box body for supporting the bottom plate and a bearing plate arranged between the turntable and the bottom plate in a cushioning manner;

The rotary table is provided with a movable interface communicated with the cavity, the bearing plate is provided with a static interface communicated with the movable interface, and the high-pressure water pipe is communicated with the static interface.

Optionally, the indexable water bulge forming hydraulic press further comprises a sealing ring which is arranged between the turntable and the bearing plate in a cushioning manner;

The static interface passes through the sealing ring.

Optionally, the indexable water bulge forming hydraulic machine further comprises a rotary servo motor connected to the supporting box body and a gear connected to a power end of the rotary servo motor;

the gear and the gear teeth on the periphery of the turntable form a gear transmission pair so that the turntable can be driven by the rotary servo motor.

Compared with the prior art, the indexable water bulge forming hydraulic machine has the beneficial effects that in the indexable water bulge forming hydraulic machine provided by the application, the lower dies symmetrically arranged around the rotating central shaft of the turntable can be mutually changed in position in the process that the turntable rotates 180 degrees, and the upper dies abutting on the lower dies can be correspondingly changed in position. Because the lifting electric cylinder and the mold locking oil cylinder are symmetrically arranged about the rotation central axis of the turntable, when one group of molds moves to the action station of the lifting electric cylinder, the other group of molds can just move to the action station of the mold locking oil cylinder. In the process that the lifting electric cylinder drives one group of upper dies to approach or depart from the lower die, the die locking oil cylinder can drive the pressure head to tightly press the upper die on the other group of dies on the lower die, and high-pressure water is introduced to carry out water expansion molding on target products in the group of dies. The indexable water-swelling forming hydraulic machine provided by the application can synchronously carry out the raw material loading and finished product unloading process and the product forming process, so that the forming efficiency of water-swelling forming can be obviously improved, and the indexable water-swelling forming hydraulic machine is far superior to the prior art.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a partial cross-sectional view of an indexable water bulge forming hydraulic machine in accordance with an embodiment of the application;

FIG. 2 is an enlarged view of the structure of FIG. 1 at A;

FIG. 3 is a partial cross-sectional view of an indexable water bulge forming hydraulic machine in accordance with an embodiment of the application;

FIG. 4 is a schematic diagram of a front view of an indexable water bulge forming hydraulic machine in accordance with an embodiment of the application;

FIG. 5 is a schematic top view of an indexable water bulge forming hydraulic machine in accordance with an embodiment of the application;

Fig. 6 is a partial enlarged view of an embodiment of the present application.

The drawing comprises the following reference numerals of 101, a bottom plate, 102, a top plate, 103, a turntable, 104, a lower die, 105, an upper die, 106, a cavity, 107, a lifting electric cylinder, 108, a die locking oil cylinder, 109, a pressure head, 110, a high-pressure water pipe, 111, a pressure plate, 112, a lifting sliding block, 113, a pulling seat, 114, a T-shaped groove, 115, a T-shaped block, 116, a rotating bracket, 117, a wire rail, 118, a guide rod, 119, a stand column, 120, a die locking sliding block, 121, a supporting box body, 122, a bearing plate, 123, a movable interface, 124, a static interface, 125, a sealing ring, 126, a rotary servo motor, 127, a gear, 128, a high-pressure water cylinder, 129, a pressurizing oil cylinder, 130, a cylindrical cavity, 131 and a cylindrical boss.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1 to 6, an indexable water bulge forming hydraulic machine according to an embodiment of the application will be described. The indexable water bulge forming hydraulic machine comprises a bottom plate 101, a top plate 102, a turntable 103, a die, a driving mechanism and a high-pressure water pipe 110. Wherein:

The top plate 102 and the bottom plate 101 are arranged at intervals, the turntable 103 is rotatably arranged on the bottom plate 101 and arranged between the top plate 102 and the bottom plate 101, the mold comprises a lower mold 104 and an upper mold 105 which are arranged in pairs, the lower mold 104 is connected to the turntable 103 and symmetrically arranged relative to the rotation center axis of the turntable 103, the upper mold 105 is abutted to one side, away from the turntable 103, of the lower mold 104 along the direction perpendicular to the turntable 103 and forms a cavity 106 for forming a target product in cooperation with the lower mold 104, the driving mechanism comprises a lifting cylinder 107 and a mold locking cylinder 108 which are respectively connected to the top plate 102, the driving mechanism further comprises a pressure head 109 which is connected to the mold locking cylinder 108 and can be driven by the mold locking cylinder 108, the power end of the lifting cylinder 107 is detachably connected to the upper mold 105 and can drive the upper mold 105 to approach or separate from the lower mold 104 along the direction perpendicular to the turntable 103, the moving path of the pressure head 109 is perpendicular to the turntable 103 and interferes with the rotating path of the upper mold 105, the lifting cylinder 107 and the mold locking cylinder 108 is also symmetrically arranged relative to the rotation center axis of the turntable 103, and the high-pressure water pipe 110 is communicated to the cavity 106 and is used for filling high-pressure water into the cavity 106. In this embodiment, the high-pressure water pipe 110 fills high-pressure water into the blank to be expanded in the cavity 106 to realize the water expansion forming operation of the target product. It will be appreciated that the indexable water expansion forming hydraulic machine provided in this embodiment should further include mechanisms commonly used in the art for generating high-pressure water, such as a high-pressure water cylinder 128, a booster cylinder 129, and a water source, where a plunger of the high-pressure water cylinder 128 is driven by the booster cylinder 129, so as to boost the water in the high-pressure water cylinder 128, and the formed high-pressure water is supplied to the blank to be expanded in the cavity 106 through the high-pressure water pipe 110 connected to an output port of the high-pressure water cylinder 128, and a cylinder diameter of the booster cylinder 129 is generally much larger than a plunger diameter of the high-pressure water cylinder 128, which is not described herein in detail.

According to the above structure provided in the present embodiment, in the indexable water bulge forming hydraulic press provided in the present embodiment, the lower dies 104 symmetrically disposed about the rotation center axis of the turntable 103 can be mutually shifted in position in the process of rotating the turntable 103 through 180 °, and the upper dies 105 abutting on the lower dies 104 can be correspondingly shifted. Since the lifting cylinder 107 and the mold locking cylinder 108 are also symmetrically disposed about the rotation center axis of the turntable 103, when one set of molds is moved to the action position of the lifting cylinder 107, the other set of molds can be moved to the action position of the mold locking cylinder 108. In this way, in the process that the lifting cylinder 107 drives one of the upper dies 105 to approach or depart from the lower die 104, the die locking cylinder 108 can drive the pressure head 109 to press the upper die 105 on the other group of dies onto the lower die 104 to lock the dies, and then high-pressure water is introduced to perform water expansion molding on the target products in the group of dies, wherein the lifting cylinder 107 adopts a servo motor as a lifting cylinder of power so as to accurately control the position of the T-shaped block 115. The indexable water-swelling forming hydraulic machine provided by the application can synchronously carry out the raw material loading and finished product unloading process and the product forming process, so that the forming efficiency of water-swelling forming can be obviously improved, and the indexable water-swelling forming hydraulic machine is far superior to the prior art.

In another embodiment of the present application, referring to fig. 1 to 6, the driving mechanism further includes a lifting slider 112 connected to the upper mold 105 and a pulling seat 113 connected to the power end of the lifting cylinder 107, wherein a T-shaped slot 114 extending along an arc-shaped path is formed on the lifting slider 112, the T-shaped slot 114 extends in a plane parallel to the turntable 103 and is coaxially arranged with the turntable 103, the T-shaped slots 114 on all the lifting sliders 112 are located on the same circumferential path, and a T-shaped block 115 which is adapted in shape to the T-shaped slot 114 and can be stopped in the T-shaped slot 114 is connected to the pulling seat 113. According to the above structure provided in this embodiment, along with the rotation of the turntable 103, the T-shaped blocks 115 connected to the pulling seat 113 can sequentially pass through the T-shaped grooves 114 formed by the lifting sliders 112 on different upper dies 105, so that when the T-shaped blocks 115 are stopped in the T-shaped grooves 114, the lifting cylinders 107 can sequentially pass through the pulling seat 113, the T-shaped blocks 115 and the lifting sliders 112 to drive the upper dies 105 to approach or separate from the lower dies 104. When the raw materials are loaded, the turntable 103 rotates to quickly separate the T-shaped block 115 from the T-shaped groove 114, which is beneficial to further improving the molding efficiency of the indexable water bulge forming hydraulic machine in the embodiment.

Through the arrangement, initially, the pulling seat 113 drives the T-shaped block 115 to descend to a set position under the driving of the lifting electric cylinder 107, when the turntable 103 drives the upper die 105 and the lower die 104 to reach the lower part of the lifting electric cylinder 107, the T-shaped block 115 gradually enters the T-shaped groove 114, after the upper die 105 and the lower die 104 reach the position right below the lifting electric cylinder 107, the turntable 103 pauses, the lifting electric cylinder 107 drives the pulling seat 113 to drive the T-shaped block 115 to ascend so that the upper die 105 is far away from the lower die 104 to realize die opening, at the moment, a target product can be taken out from the lower die 104 or a blank to be subjected to water expansion molding is placed into the lower die 104, after the completion, the lifting electric cylinder 107 drives the pulling seat 113 to drive the T-shaped block 115 to descend to close the upper die 105 to the lower die 104 to realize die closing, the T-shaped block 115 is kept at the current position, then the turntable 103 drives the upper die 105 and the lower die 104 loaded with a blank to be subjected to water expansion molding to rotate to the position right below the die locking electric cylinder 108, in the process, the current T-shaped groove 114 gradually leaves the T-shaped block 115 area, and the synchronous upper die 105 and the lower die 104 are completed to automatically realize water expansion molding and the automatic conversion to reach the position of the T-shaped block 104 and the T-shaped block 104, and the die opening and the die 107 is realized.

In another embodiment of the present application, referring to fig. 1 to 6, the driving mechanism further includes a pressing plate 111 detachably connected to the lifting slider 112 and used for abutting against the pressing head 109, wherein the pressing plate 111 has two pressing plates installed at the upper end of the lifting slider 112 and located at two sides of the T-shaped slot 114, and the interval between the two pressing plates 111 is consistent with the extending path of the T-shaped slot 114, so as to allow the connection portion between the T-shaped block 115 and the pulling seat 113 to pass through. According to the above structure provided in the present embodiment, on one hand, the pressing plate 111 connected to the upper die 105 can effectively avoid the collapse of the top opening of the T-shaped slot 114 on the lifting slider 112 when the pressing head 109 presses down the die to ensure that the T-shaped block 115 can smoothly enter and exit the T-shaped slot 114, and on the other hand, the detachable connection of the lifting slider 112 and the pressing plate 111 can facilitate the replacement of the pressing plate 111 after being subjected to more wear, which is beneficial to enabling the indexable water-swelling forming hydraulic machine provided in the present embodiment to be stably used for a longer time.

In another embodiment of the present application, referring to fig. 1 to 6, the driving mechanism further includes a rotating bracket 116 coaxially connected to the turntable 103, and a wire rail 117 slidably connected to the lifting slider 112 is formed on the rotating bracket 116. According to the structure provided in this embodiment, the wire rail 117 formed on the rotating bracket 116 can ensure that the lifting slider 112 moves more quickly and stably, so as to ensure the position stability of the upper die 105 when moving up and down, which is beneficial to further improving the molding efficiency of the indexable water bulge forming hydraulic machine in this embodiment, meanwhile, since the rotating bracket 116 is located between the action station of the lifting cylinder 107 and the action station of the die locking cylinder 108, when unexpected situations such as high-pressure water leakage, product or die bursting occur in the water bulge forming process, the rotating bracket 116 can play an effective blocking role, so as to protect operators who take products at the action station of the lifting cylinder 107, and the safety is remarkably enhanced.

In another embodiment of the present application, referring to fig. 1 to 6, the driving mechanism further includes a guide rod 118 connected to the pulling seat 113, wherein the guide rod 118 penetrates the top plate 102 and is slidably connected to the top plate 102, and the extending direction of the wire rail 117 is parallel to the sliding direction of the guide rod 118 relative to the top plate 102. According to the above structure provided in the present embodiment, the guide rod 118 slidably connected to the top plate 102 can make the pulling seat 113 move more quickly and stably, which is beneficial to further improving the molding efficiency of the indexable water bulge forming hydraulic machine in the present embodiment.

In another embodiment of the present application, referring to fig. 1 to 6, the driving mechanism further includes a plurality of columns 119 connected between the bottom plate 101 and the top plate 102, the columns 119 are perpendicular to the turntable 103 and are distributed in a triangle shape, the rotating support 116 is coaxially sleeved on one of the columns 119, and it can be understood that the columns 119 simultaneously coaxially pass through the turntable 103, where the rotating support 116 and the columns 119 are provided with sliding bearings for smooth rotation support when the rotating support 116 rotates along with the turntable 103, and the other columns 119 are located outside the maximum contour of the turntable 103. According to the above structure provided in the present embodiment, the three columns 119 and the triangular distribution of the columns 119 can maintain a stable interval between the top plate 102 and the bottom plate 101 by virtue of the triangular stability, and the turntable 103 can smoothly rotate in position, which is advantageous in that the indexable water bulge forming hydraulic machine provided in the present embodiment can be stably used for a longer period of time.

In another embodiment of the present application, referring to fig. 1 to 6, the driving mechanism further includes a mold clamping slider 120 slidably connected to the upright 119, and the ram 109 is connected to the mold clamping slider 120 and is connected to the mold clamping cylinder 108 through the mold clamping slider 120. According to the above structure provided in the present embodiment, the mold clamping slider 120 slidably connected to the upright 119 can make the ram 109 connected to the mold clamping slider 120 move more rapidly and stably, which is advantageous for further improving the molding efficiency of the indexable water bulge-forming hydraulic machine in the present embodiment.

In another embodiment of the present application, referring to fig. 1 to 6, the indexable water bulge forming hydraulic press further includes a supporting box 121 for supporting the bottom plate 101, and a bearing plate 122 arranged between the turntable 103 and the bottom plate 101, wherein a movable port 123 communicating with the cavity 106 is arranged on the turntable 103, a static port 124 communicating with the movable port 123 is arranged on the bearing plate 122, and the high-pressure water pipe 110 communicates with the static port 124. According to the above structure provided in the present embodiment, the supporting case 121 and the bearing plate 122 can significantly improve the load bearing capacity of the turntable 103, which is advantageous in enabling the indexable water bulge forming hydraulic machine provided in the present embodiment to be stably used for a longer period of time. As a further preferred embodiment, a concave cylindrical cavity 130 is formed at one end of the bearing plate 122 facing the turntable 103, and a cylindrical boss 131 extending into the cylindrical cavity 130 is formed on the corresponding turntable 103, wherein the outer wall of the cylindrical boss 131 is in sliding fit with the inner wall of the cylindrical cavity 130, and the axis of the cylindrical cavity 130, the axis of the cylindrical boss 131, the rotation axis of the rotating bracket 116 and the axis of the turntable 103 are coaxial, so that precise rotation guiding can be performed on the turntable 103, and smooth indexing of the lower die 104 and the upper die 105 can be realized through the cooperation of the rotating bracket 116.

In addition, in the process of rotating the turntable 103, when the static interface 124 and the movable interface 123 are communicated, high-pressure water in the high-pressure water pipe 110 can be poured into the blank to be expanded in the cavity 106, that is, when the turntable 103 drives the lower die 104 and the upper die 105 which are already provided with the blank to be expanded to rotate below the pressure head 109, the static interface 124 and the movable interface 123 are just aligned and communicated, and when the pressure head 109 descends to complete the die locking, the high-pressure water in the high-pressure water pipe 110 can be poured into the blank to be expanded in the cavity 106 to complete the water expansion molding of a target product, which is beneficial to further improving the molding efficiency of the indexable water expansion molding hydraulic press in the embodiment.

In another embodiment of the present application, referring to fig. 1 to 6, the indexable water bulge forming hydraulic machine further comprises a sealing ring 125 interposed between the turntable 103 and the bearing plate 122, and the static port 124 penetrates the sealing ring 125, and as a further preferred embodiment, a circular groove is formed on the surface of the bearing plate 122 facing the turntable 103 for installing the sealing ring 125, and the groove is concentric with the opening of the static port 124 on the upper surface of the bearing plate 122. According to the above structure provided in the present embodiment, the sealing performance between the movable port 123 and the stationary port 124 can be ensured by the seal ring 125 with a fixed position, which is beneficial to further improving the molding efficiency of the indexable water bulge forming hydraulic machine in the present embodiment.

In another embodiment of the present application, referring to fig. 1 to 6, the indexable water bulge forming hydraulic machine further includes a rotary servo motor 126 connected to the supporting box 121 and a gear 127 connected to a power end of the rotary servo motor 126, wherein the gear 127 and teeth on an outer periphery of the turntable 103 form a gear pair to enable the turntable 103 to be driven by the rotary servo motor 126. According to the above structure provided in the present embodiment, the rotary servo motor 126 and the gear 127 forming a gear transmission pair in cooperation with the turntable 103 can make the turntable 103 rotate more rapidly and accurately, so that the upper die 105 can be made to correspond to the lifting cylinder 107 and the die locking cylinder 108 more rapidly, which is advantageous for further improving the molding efficiency of the indexable water bulge-forming hydraulic machine in the present embodiment.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims (10)

1. An indexable water bulge forming hydraulic press, comprising:

A bottom plate (101);

a top plate (102) arranged at a distance from the bottom plate (101);

a turntable (103) rotatably mounted on the bottom plate (101) and disposed between the top plate (102) and the bottom plate (101);

The die comprises a lower die (104) and an upper die (105) which are arranged in pairs, wherein the lower die (104) is connected to the turntable (103) and is symmetrically arranged about a rotation center axis of the turntable (103), and the upper die (105) is abutted to one side, away from the turntable (103), of the lower die (104) along a direction perpendicular to the turntable (103) and is matched with the lower die (104) to form a cavity (106) for forming a target product;

the driving mechanism comprises a lifting electric cylinder (107) and a mold locking oil cylinder (108) which are respectively connected to the top plate (102), and further comprises a pressure head (109) which is connected to the mold locking oil cylinder (108) and can be driven by the mold locking oil cylinder (108), wherein the power end of the lifting electric cylinder (107) is detachably connected to the upper mold (105) and can drive the upper mold (105) to approach or separate from the lower mold (104) along the direction perpendicular to the turntable (103), the moving path of the pressure head (109) is perpendicular to the turntable (103) and interferes with the rotating path of the upper mold (105), and the lifting electric cylinder (107) and the mold locking oil cylinder (108) are symmetrically arranged about the rotating center axis of the turntable (103);

And the high-pressure water pipe (110) is communicated with the cavity (106) and is used for filling high-pressure water into the cavity (106).

2. The indexable water bulge forming hydraulic machine of claim 1 wherein:

The driving mechanism also comprises a lifting sliding block (112) connected to the upper die (105) and a pulling seat (113) connected to the power end of the lifting electric cylinder (107);

T-shaped grooves (114) extending along an arc-shaped path are formed on the lifting sliding blocks (112), the T-shaped grooves (114) extend in a plane parallel to the rotary table (103) and are coaxially arranged with the rotary table (103), all the T-shaped grooves (114) on the lifting sliding blocks (112) are located on the same circumference path, and the pulling seat (113) is connected with T-shaped blocks (115) which are matched with the T-shaped grooves (114) in shape and can be stopped in the T-shaped grooves (114) through the T-shaped grooves (114).

3. The indexable water bulge forming hydraulic machine of claim 2 wherein:

the driving mechanism further comprises a pressing plate (111) which is detachably connected to the lifting sliding block (112) and used for being abutted against the pressing head (109).

4. An indexable water bulge forming hydraulic machine as set forth in claim 3, wherein:

The driving mechanism further comprises a rotating bracket (116) coaxially connected with the turntable (103);

the rotating bracket (116) is provided with a wire rail (117) which is connected with the lifting slide block (112) in a sliding way.

5. The indexable water bulge forming hydraulic machine of claim 4 wherein:

the driving mechanism further comprises a guide rod (118) connected to the pulling seat (113);

The guide rod (118) penetrates through the top plate (102) and is in sliding connection with the top plate (102), and the extending direction of the wire rail (117) is parallel to the sliding direction of the guide rod (118) relative to the top plate (102).

6. The indexable water bulge forming hydraulic machine of claim 4 wherein:

the driving mechanism further comprises a plurality of upright posts (119) connected between the bottom plate (101) and the top plate (102);

The upright posts (119) are perpendicular to the turntable (103) and distributed in a triangle shape, and the rotary support (116) is coaxially and movably sleeved on one of the upright posts (119);

The other posts (119) are located outside the maximum profile of the turntable (103).

7. The indexable water bulge forming hydraulic machine of claim 6 wherein:

The driving mechanism further comprises a mold locking sliding block (120) which is connected to the upright column (119) in a sliding way;

The pressure head (109) is connected to the mold locking slide block (120) and is connected to the mold locking cylinder (108) through the mold locking slide block (120).

8. The indexable water bulge forming hydraulic machine of claim 1 wherein:

The indexable water bulge forming hydraulic press further comprises a supporting box body (121) for supporting the bottom plate (101) and a bearing plate (122) which is arranged between the turntable (103) and the bottom plate (101) in a cushioning mode;

The rotary table (103) is provided with a movable joint (123) communicated with the cavity (106), the pressure bearing plate (122) is provided with a static joint (124) communicated with the movable joint (123), and the high-pressure water pipe (110) is communicated with the static joint (124).

9. The indexable water bulge forming hydraulic machine of claim 8 wherein:

The indexable water bulge forming hydraulic press further comprises a sealing ring (125) which is arranged between the turntable (103) and the bearing plate (122) in a cushioning manner;

the static interface (124) passes through the sealing ring (125).

10. The indexable water bulge forming hydraulic machine of claim 8 wherein:

The indexable water bulge forming hydraulic press further comprises a rotary servo motor (126) connected to the supporting box body (121) and a gear (127) connected to the power end of the rotary servo motor (126);

The gear (127) and the gear teeth on the periphery of the turntable (103) form a gear transmission pair so that the turntable (103) can be driven by the rotary servo motor (126).