Indexable water expansion forming hydraulic machine

Abstract

The invention belongs to the technical field of hydraulic forming, and provides an indexable water expansion forming hydraulic machine which comprises a bottom plate, a top plate, a rotating disc, a mold, a driving mechanism and a high-pressure water pipe. Wherein the top plate and the bottom plate are arranged at intervals; the turntable is rotationally mounted on the bottom plate and is arranged between the top plate and the bottom plate; the dies comprise lower dies and upper dies which are arranged in pairs, the lower dies are connected to the rotating disc and are symmetrically arranged about the rotating center axis of the rotating disc, and the upper dies abut against the sides, away from the rotating disc, of the lower dies in the direction perpendicular to the rotating disc and are matched with the lower dies to form cavities used for forming target products; the driving mechanism comprises a lifting electric cylinder and a mold locking oil cylinder which are respectively connected to the top plate, and further comprises a pressure head which is connected to the mold locking oil cylinder and can be driven by the mold locking oil cylinder, and the lifting electric cylinder and the mold locking oil cylinder are also symmetrically arranged about the rotating central axis of the turntable; the high-pressure water pipe communicates with the cavity and is used for pouring high-pressure water into the cavity.

Description

Technical Field

[0001] The present application belongs to the technical field of hydraulic forming, and in particular to an indexable water expansion forming hydraulic press. Background Art

[0002] Traditional hydraulic bulging forming presses usually adopt a single-station operation mode, that is, the entire process of material loading, bulging forming, finished product removal and reloading is completed at a fixed position. This operation mode has an obvious efficiency bottleneck, that is, the time waiting for material loading and unloading will significantly reduce the overall forming efficiency of the equipment and limit the production line's capacity. Therefore, it is necessary to solve the above technical problems. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide an indexable hydraulic press for water bulging molding to solve the technical problem of low water bulging molding efficiency in the prior art.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted in this application is: to provide an indexable water expansion forming hydraulic press, comprising: Base plate; A top plate, spaced apart from the bottom plate; A turntable, rotatably mounted on the bottom plate and disposed between the top plate and the bottom plate; The mold comprises a lower mold and an upper mold arranged in pairs, wherein the lower mold is connected to the turntable and symmetrically arranged about the rotation center axis of the turntable, and the upper mold abuts against a 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 molding a target product; The driving mechanism comprises a lifting electric cylinder and a clamping oil cylinder respectively connected to the top plate, and also comprises a pressure head connected to the clamping oil cylinder and capable of being driven by the clamping oil cylinder, the power end of the lifting electric cylinder is detachably connected to the upper mold and can drive the upper mold to approach or move away from the lower mold in a direction perpendicular to the turntable, the moving path of the pressure head is perpendicular to the turntable and interferes with the rotation path of the upper mold, and the lifting electric cylinder and the clamping oil cylinder are also symmetrically arranged about the rotation center axis of the turntable; The high-pressure water pipe is connected to the mold cavity and is used to inject high-pressure water into the mold cavity.

[0005] Optionally, the driving mechanism further comprises a lifting slide block connected to the upper die and a pulling seat connected to the power end of the lifting electric cylinder; A T-shaped slot extending along an arc path is formed on the lifting slider, and the T-shaped slot extends in a plane parallel to the turntable and is coaxially arranged with the turntable. The T-shaped slots on all the lifting sliders are located on the same circular path, and the pulling seat is connected with a T-shaped block that is adapted to the shape of the T-shaped slot and can pass through the T-shaped slot or stop in the T-shaped slot.

[0006] Optionally, the driving mechanism further comprises a pressing plate detachably connected to the lifting slider and used for abutting against the pressing head.

[0007] Optionally, the driving mechanism further comprises a rotating bracket coaxially connected to the rotating disk; The rotating bracket is formed with a linear rail which is slidably connected to the lifting slider.

[0008] Optionally, the driving mechanism further comprises a guide rod connected to the pulling seat; The guide rod passes through the top plate and is slidably connected to the top plate, and the extension direction of the linear rail is parallel to the sliding direction of the guide rod relative to the top plate.

[0009] Optionally, the driving mechanism further comprises a plurality of columns connected between the bottom plate and the top plate; The columns are perpendicular to the turntable and are distributed in a triangular shape, and the rotating bracket is coaxially movably mounted on one of the columns; The other pillars are located outside the maximum contour of the turntable.

[0010] Optionally, the driving mechanism further comprises a mold locking slider slidably connected to the column; The pressure head is connected to the mold locking slider and is connected to the mold locking cylinder through the mold locking slider.

[0011] Optionally, the indexable water expansion forming hydraulic press further comprises a support box for supporting the bottom plate, and a pressure plate arranged between the turntable and the bottom plate; The turntable is provided with a dynamic interface connected to the cavity, the pressure plate is provided with a static interface for connecting with the dynamic interface, and the high-pressure water pipe is connected with the static interface.

[0012] Optionally, the indexable water expansion forming hydraulic press further comprises a sealing ring arranged between the rotating disk and the pressure plate; The static interface passes through the sealing ring.

[0013] Optionally, the indexable water expansion forming hydraulic press further comprises a rotary servo motor connected to the support box and a gear connected to a power end of the rotary servo motor; The gear and the gear teeth on the outer periphery of the turntable form a gear transmission pair so that the turntable can be driven by the rotation servo motor.

[0014] The beneficial effect of the indexable water expansion forming hydraulic press provided by the present application is that: compared with the prior art, in the indexable water expansion forming hydraulic press provided by the present application, the lower molds symmetrically arranged around the central axis of rotation of the turntable can be interchanged with each other during the process of the turntable rotating 180°, and the upper molds abutting against the lower molds can also be interchanged accordingly. Since the lifting electric cylinder and the clamping cylinder are also symmetrically arranged about the central axis of rotation of the turntable, when one group of molds moves to the action station of the lifting electric cylinder, the other group of molds can be just moved to the action station of the clamping cylinder. In this way, in the process of the lifting electric cylinder driving one group of upper molds to approach or move away from the lower mold, the clamping cylinder can drive the pressure head to press the upper mold on the other group of molds against the lower mold, and pass high-pressure water to perform water expansion forming on the target product in the group of molds. Therefore, the indexable water expansion forming hydraulic press provided by the present application can synchronize the raw material loading and finished product unloading processes with the product forming process, which can significantly improve the forming efficiency of water expansion forming, which is far superior to the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A partial cross-sectional view of an indexable water expansion forming hydraulic press in an embodiment of the present application; Figure 2 for Figure 1 A magnified view of the structure at center; Figure 3 It is a partial structural cross-sectional view of the indexable water expansion forming hydraulic press in the embodiment of the present application; Figure 4 This is a schematic diagram of the main structure of the indexable water expansion forming hydraulic press in the embodiment of the present application; Figure 5 This is a schematic diagram of the top view of the indexable water expansion forming hydraulic press in the embodiment of the present application; Figure 6 This is a partial enlarged view of an embodiment of the present application.

[0017] Among them, the reference numerals in the figure are: 101, bottom plate; 102, top plate; 103, turntable; 104, lower mold; 105, upper mold; 106, cavity; 107, lifting electric cylinder; 108, locking cylinder; 109, pressure head; 110, high-pressure water pipe; 111, pressure plate; 112, lifting slider; 113, pulling seat; 114, T-slot; 115, T-block; 116, rotating bracket; 117, linear rail; 118, guide rod; 119, column; 120, locking slider; 121, supporting box; 122, pressure plate; 123, dynamic interface; 124, static interface; 125, sealing ring; 126, rotating servo motor; 127, gear; 128, high-pressure water cylinder; 129, booster cylinder; 130, cylindrical cavity; 131, cylindrical boss. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0019] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or 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 indirectly connected to the other element.

[0020] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] Please also read Figures 1 to 6Now, a hydraulic press for water expansion molding with indexable positions provided in the embodiment of the present application is described. The hydraulic press for water expansion molding with indexable positions includes a bottom plate 101, a top plate 102, a turntable 103, a mold, a driving mechanism and a high-pressure water pipe 110. Among them: The top plate 102 is spaced apart from the bottom plate 101; the turntable 103 is rotatably mounted on the bottom plate 101 and is arranged between the top plate 102 and the bottom plate 101; the mold includes a lower mold 104 and an upper mold 105 arranged in pairs, the lower mold 104 is connected to the turntable 103 and is symmetrically arranged about the rotation center axis of the turntable 103, the upper mold 105 abuts against a side of the lower mold 104 away from the turntable 103 in a direction perpendicular to the turntable 103 and cooperates with the lower mold 104 to form a cavity 106 for molding a target product; the driving mechanism includes a lifting electric cylinder 107 and a clamping mold 105 respectively connected to the top plate 102 The oil cylinder 108 also includes a pressure head 109 connected to the mold locking oil cylinder 108 and can be driven by the mold locking oil cylinder 108. 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 move away from the lower mold 104 in a direction perpendicular to the turntable 103. The moving path of the pressure head 109 is perpendicular to the turntable 103 and interferes with the rotation path of the upper mold 105. The lifting electric cylinder 107 and the mold locking oil cylinder 108 are also symmetrically arranged about the rotation center axis of the turntable 103. The high-pressure water pipe 110 is connected to the mold cavity 106 and is used to inject high-pressure water into the mold cavity 106. In this embodiment, the high-pressure water pipe 110 realizes the water expansion molding operation of the target product by injecting high-pressure water into the blank to be expanded in the mold cavity 106. It can be understood that the indexable water expansion forming hydraulic press provided in this embodiment should also include mechanisms commonly used in the art for generating high-pressure water, such as a high-pressure water cylinder 128 and a booster cylinder 129, as well as a water source and other mechanisms. The plunger of the high-pressure water cylinder 128 is driven by the booster cylinder 129, thereby pressurizing the water in the high-pressure water cylinder 128. The formed high-pressure water is passed into the mold cavity 106 by a high-pressure water pipe 110 connected to the output port of the high-pressure water cylinder 128 and supplied to the blank to be expanded in the mold cavity 106. The cylinder diameter of the booster cylinder 129 is usually much larger than the plunger diameter of the high-pressure water cylinder 128, and no further details will be given here.

[0023] According to the above structure provided in this embodiment, in the indexable water expansion molding hydraulic press provided in this embodiment, the lower mold 104 symmetrically arranged around the rotation center axis of the turntable 103 can be interchanged with each other during the process of the turntable 103 rotating 180°, and the upper mold 105 abutting against the lower mold 104 can also be interchanged accordingly. Since the lifting electric cylinder 107 and the clamping cylinder 108 are also symmetrically arranged about the rotation center axis of the turntable 103, when one set of molds moves to the action position of the lifting electric cylinder 107, the other set of molds can be just moved to the action position of the clamping cylinder 108. In this way, when the lifting electric cylinder 107 drives one of the upper molds 105 to approach or move away from the lower mold 104, the clamping oil cylinder 108 can drive the pressure head 109 to press the upper mold 105 on the other set of molds against the lower mold 104 to achieve clamping, and then, high-pressure water is introduced to perform water expansion molding on the target product in the set of molds. Here, the lifting electric cylinder 107 is a lifting electric cylinder using a servo motor as a power source, so as to accurately control the position of the T-shaped block 115. Therefore, the indexable water expansion molding hydraulic press provided in the present application can synchronize the raw material loading and finished product unloading processes with the product forming process, which can significantly improve the molding efficiency of water expansion molding, which is far superior to the prior art.

[0024] In another embodiment of the present application, please refer to Figures 1 to 6 The driving mechanism also includes a lifting slider 112 connected to the upper mold 105 and a pulling seat 113 connected to the power end of the lifting electric cylinder 107; a T-shaped slot 114 extending along an arc path is formed on the lifting slider 112, and 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 circular path, and a T-shaped block 115 that is adapted to the shape of the T-shaped slot 114 and can pass through the T-shaped slot 114 or stop in the T-shaped slot 114 is connected to the pulling seat 113. According to the above structure provided in this embodiment, as the turntable 103 rotates, the T-block 115 connected to the pulling seat 113 can sequentially pass through the T-slots 114 formed by the lifting sliders 112 on different upper molds 105, so that when the T-block 115 stops in the T-slot 114, the lifting cylinder 107 can sequentially drive the upper mold 105 to approach or move away from the lower mold 104 through the pulling seat 113, the T-block 115 and the lifting slider 112. When the raw material is loaded, the rotation of the turntable 103 can quickly separate the T-block 115 and the T-slot 114, which is conducive to further improving the forming efficiency of the indexable water expansion forming hydraulic press in this embodiment.

[0025] Through the above arrangement, initially, the pulling seat 113 drives the T-shaped block 115 downward to the set position under the drive of the lifting electric cylinder 107. When the turntable 103 drives the upper mold 105 and the lower mold 104 to reach the bottom of the lifting electric cylinder 107, the T-shaped block 115 gradually enters the T-shaped groove 114. When the upper mold 105 and the lower mold 104 reach directly below the lifting electric cylinder 107, the turntable 103 pauses, and the pulling seat 113 drives the T-shaped block 115 to rise under the drive of the lifting electric cylinder 107 to make the upper mold 105 away from the lower mold 104 to realize mold opening. At this time, the target product can be taken out of the lower mold 104 or the blank to be water-expanded can be placed in the lower mold. 104, after completion, the lifting electric cylinder 107 drives the lower pulling seat 113 to drive the T-block 115 downward to move the upper mold 105 close to the lower mold 104 to achieve mold closing, and the T-block 115 remains in the current position. Then the turntable 103 drives the upper mold 105 and the lower mold 104 loaded with the blank to be water-expanded to rotate to the bottom of the locking cylinder 108. During this process, the current T-slot 114 gradually leaves the T-block 115 area, and synchronously, another group of upper molds 105 and lower molds 104 that have completed water-expanded molding arrive under the lifting electric cylinder 107 and the T-block 115 enters the T-slot 114. This cycle automatically switches the workstation and realizes mold opening and closing.

[0026] In another embodiment of the present application, please refer to Figures 1 to 6 The driving mechanism further includes a pressing plate 111 detachably connected to the lifting slider 112 and used to abut against the pressure head 109. Specifically, the pressing plate 111 has two pieces installed on the upper end of the lifting slider 112 and located on both sides of the T-shaped slot 114. The interval between the two pressing plates 111 is consistent with the extension path of the T-shaped slot 114, which is used to allow the connection between the T-shaped block 115 and the pulling seat 113 to pass. According to the above structure provided in this embodiment, on the one hand, the pressing plate 111 connected to the upper mold 105 can effectively prevent the top opening of the T-shaped slot 114 on the lifting slider 112 from collapsing when the pressure head 109 presses down to lock the mold, so as to ensure that the T-shaped block 115 can smoothly enter and exit the T-shaped slot 114. On the other hand, the lifting slider 112 and the pressing plate 111 can be detachably connected, so that the pressing plate 111 can be easily replaced after being worn, which is conducive to the stable use of the indexable water expansion forming hydraulic press provided in this embodiment for a longer period of time.

[0027] In another embodiment of the present application, please refer to Figures 1 to 6The driving mechanism also includes a rotating bracket 116 coaxially connected to the turntable 103; a linear rail 117 is formed on the rotating bracket 116 and is slidably connected to the lifting slider 112. According to the above structure provided in this embodiment, the linear rail 117 formed on the rotating bracket 116 can ensure that the lifting slider 112 moves more quickly and stably to ensure the position stability of the upper mold 105 when it moves up and down, which is conducive to further improving the molding efficiency of the indexable water expansion molding hydraulic press in this embodiment; at the same time, since the rotating bracket 116 is located between the action station of the lifting electric cylinder 107 and the action station of the clamping cylinder 108, therefore, when there are unexpected situations such as high-pressure water leakage, product or mold bursting during the water expansion molding process, the rotating bracket 116 can play an effective blocking role to protect the operator who loads and unloads the product at the action station of the lifting electric cylinder 107, which significantly enhances safety.

[0028] In another embodiment of the present application, please refer to Figures 1 to 6 The driving mechanism further includes a guide rod 118 connected to the pulling seat 113; the guide rod 118 penetrates the top plate 102 and is slidably connected to the top plate 102, and the extension direction of the linear 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 this 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 conducive to further improving the forming efficiency of the indexable water expansion forming hydraulic press in this embodiment.

[0029] In another embodiment of the present application, please refer to Figures 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 triangular shape, and the rotating bracket 116 is coaxially movably mounted on one of the columns 119. It can be understood that the column 119 also coaxially passes through the turntable 103. Here, a sliding bearing is usually installed between the rotating bracket 116 and the column 119 to smoothly support the rotating bracket 116 when it rotates with the turntable 103; the other columns 119 are located outside the maximum contour of the turntable 103. According to the above structure provided in this embodiment, there are three columns 119 and the columns 119 distributed in a triangular shape can use the stability of the triangle to maintain a stable interval between the top plate 102 and the bottom plate 101, and enable the turntable 103 to rotate smoothly, which is conducive to the indexable water expansion forming hydraulic press provided in this embodiment to be stably used for a longer time.

[0030] In another embodiment of the present application, please refer to Figures 1 to 6The driving mechanism further includes a locking slider 120 slidably connected to the column 119; the pressure head 109 is connected to the locking slider 120 and is connected to the locking cylinder 108 through the locking slider 120. According to the above structure provided in this embodiment, the locking slider 120 slidably connected to the column 119 can make the pressure head 109 connected to the locking slider 120 move more quickly and stably, which is conducive to further improving the molding efficiency of the indexable water expansion molding hydraulic press in this embodiment.

[0031] In another embodiment of the present application, please refer to Figures 1 to 6 The indexable hydraulic bulging forming press also includes a support box 121 for supporting the bottom plate 101, and a pressure plate 122 arranged between the turntable 103 and the bottom plate 101; the turntable 103 is provided with a dynamic interface 123 connected to the cavity 106, and the pressure plate 122 is provided with a static interface 124 for communicating with the dynamic interface 123, and the high-pressure water pipe 110 is connected with the static interface 124. According to the above structure provided in this embodiment, the support box 121 and the pressure plate 122 can significantly improve the bearing capacity of the turntable 103, which is conducive to the stable use of the indexable hydraulic bulging forming press provided in this embodiment for a longer period of time. As a further preferred embodiment, in the present embodiment, a concave cylindrical cavity 130 is formed on the pressure plate 122 at one end 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 slides with the inner wall of the cylindrical cavity 130; here, 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 the turntable 103 can be accurately guided in rotation, and through the cooperation of the rotating bracket 116, the smooth rotation of the lower mold 104 and the upper mold 105 can be achieved.

[0032] In addition, during the rotation of the turntable 103, when the static interface 124 and the dynamic interface 123 are connected, the 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 mold 104 and the upper mold 105 containing the blank to be expanded to rotate to below the pressure head 109, the static interface 124 and the dynamic interface 123 are also just aligned and connected. When the pressure head 109 moves downward to complete the mold 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 the target product, which is conducive to further improving the molding efficiency of the indexable water expansion molding hydraulic press in this embodiment.

[0033] In another embodiment of the present application, please refer to Figures 1 to 6The indexable hydraulic bulging forming press also includes a sealing ring 125 cushioned between the rotating disk 103 and the pressure plate 122; the static interface 124 passes through the sealing ring 125. As a further preferred embodiment, a circular groove is provided on the surface of the pressure plate 122 facing the rotating disk 103 for installing the sealing ring 125, and the groove is concentric with the opening of the static interface 124 on the upper surface of the pressure plate 122. According to the above structure provided in this embodiment, the fixed position sealing ring 125 can ensure the sealing performance between the dynamic interface 123 and the static interface 124, which is conducive to further improving the forming efficiency of the indexable hydraulic bulging forming press in this embodiment.

[0034] In another embodiment of the present application, please refer to Figures 1 to 6 The indexable hydraulic bulging forming press also includes a rotary servo motor 126 connected to the support box 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 outer periphery of the turntable 103 form a gear transmission pair so that the turntable 103 can be driven by the rotary servo motor 126. According to the above structure provided in this embodiment, the rotary servo motor 126 and the gear 127 that cooperates with the turntable 103 to form a gear transmission pair can make the turntable 103 rotate more quickly and accurately, so that the upper mold 105 can correspond to the lifting cylinder 107 and the clamping cylinder 108 more quickly, which is conducive to further improving the molding efficiency of the indexable hydraulic bulging forming press in this embodiment.

[0035] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An indexable water expansion forming hydraulic press, characterized in that: include: Bottom plate (101); A top plate (102) is spaced apart from the bottom plate (101); A rotating disk (103) rotatably mounted on the bottom plate (101) and arranged between the top plate (102) and the bottom plate (101); A mold, comprising a lower mold (104) and an upper mold (105) arranged in pair, wherein the lower mold (104) is connected to the turntable (103) and is symmetrically arranged about the rotation center axis of the turntable (103), and the upper mold (105) abuts against a side of the lower mold (104) away from the turntable (103) in a direction perpendicular to the turntable (103) and cooperates with the lower mold (104) to form a mold cavity (106) for molding a target product; A driving mechanism, comprising a lifting electric cylinder (107) and a clamping cylinder (108) respectively connected to the top plate (102), and also comprising a pressure head (109) connected to the clamping cylinder (108) and capable of being driven by the clamping cylinder (108); 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 move away from the lower mold (104) in a direction perpendicular to the turntable (103); the moving path of the pressure head (109) is perpendicular to the turntable (103) and interferes with the rotation path of the upper mold (105); the lifting electric cylinder (107) and the clamping cylinder (108) are also symmetrically arranged about the rotation center axis of the turntable (103); A high-pressure water pipe (110) is connected to the mold cavity (106) and is used to inject high-pressure water into the mold cavity (106).

2. The indexable water expansion forming hydraulic press according to claim 1, characterized in that: The driving mechanism further comprises a lifting slide block (112) connected to the upper die (105) and a pulling seat (113) connected to the power end of the lifting electric cylinder (107); A T-shaped slot (114) extending along an arc path is formed on the lifting slider (112); the T-shaped slot (114) extends in a plane parallel to the rotating disk (103) and is arranged coaxially with the rotating disk (103); the T-shaped slots (114) on all the lifting sliders (112) are located on the same circular path; and a T-shaped block (115) matching the shape of the T-shaped slot (114) and capable of passing through the T-shaped slot (114) or being stopped in the T-shaped slot (114) is connected to the pulling seat (113).

3. The indexable water expansion forming hydraulic press according to claim 2, characterized in that: The driving mechanism further comprises a pressing plate (111) which is detachably connected to the lifting slider (112) and is used to abut against the pressing head (109).

4. The indexable water expansion forming hydraulic press according to claim 3, characterized in that: The driving mechanism further comprises a rotating bracket (116) coaxially connected to the rotating disk (103); A linear rail (117) is formed on the rotating bracket (116) and is slidably connected to the lifting slider (112).

5. The indexable water expansion forming hydraulic press according to claim 4, characterized in that: The driving mechanism further comprises a guide rod (118) connected to the pulling seat (113); The guide rod (118) passes through the top plate (102) and is slidably connected to the top plate (102); the extension direction of the linear rail (117) is parallel to the sliding direction of the guide rod (118) relative to the top plate (102).

6. The indexable water expansion forming hydraulic press according to claim 4, characterized in that: The driving mechanism further comprises a plurality of columns (119) connected between the bottom plate (101) and the top plate (102); The columns (119) are perpendicular to the rotating disk (103) and are distributed in a triangular shape, and the rotating bracket (116) is coaxially movably mounted on one of the columns (119); The other pillars (119) are located outside the maximum contour of the turntable (103).

7. The indexable water expansion forming hydraulic press according to claim 6, characterized in that: The driving mechanism further comprises a mold locking slider (120) slidably connected to the column (119); The pressure head (109) is connected to the mold locking slider (120) and is connected to the mold locking cylinder (108) via the mold locking slider (120).

8. The indexable water expansion forming hydraulic press according to claim 1, characterized in that: The indexable water expansion forming hydraulic press further comprises a support box (121) for supporting the bottom plate (101), and a pressure plate (122) cushioned between the rotating disk (103) and the bottom plate (101); The rotating disk (103) is provided with a moving interface (123) connected to the mold cavity (106), the pressure plate (122) is provided with a static interface (124) for communicating with the moving interface (123), and the high-pressure water pipe (110) is connected to the static interface (124).

9. The indexable water expansion forming hydraulic press according to claim 8, characterized in that: The indexable water expansion forming hydraulic press further comprises a sealing ring (125) arranged between the rotating disk (103) and the pressure plate (122); The static interface (124) passes through the sealing ring (125).

10. The indexable water expansion forming hydraulic press according to claim 8, characterized in that: The indexable water expansion forming hydraulic press further comprises a rotary servo motor (126) connected to the support box (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 outer periphery of the turntable (103) form a gear transmission pair so that the turntable (103) can be driven by the rotary servo motor (126).

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