Cylindrical rubber bag hydraulic machine and hydraulic machining method

Abstract

The invention relates to hydraulic machining equipment, and particularly discloses a cylindrical rubber bag hydraulic machine and a hydraulic machining method. The cylindrical rubber bag hydraulic machine comprises a rack, a forming module and a hydraulic module. The rack comprises a forming base and an operation table. The forming module comprises a cylinder body, an upper die assembly and a lower die assembly, and a pressurizing cavity is formed in the forming cylinder body; the upper die assembly comprises a supporting piece and a pressure applying piece, the lower die assembly comprises a lower cushion block and a pressure bearing die, and the lower cushion block and the supporting piece are oppositely arranged up and down; two middle check blocks are arranged between the lower cushion block and the supporting piece, and a forming interval is defined by the lower cushion block, the supporting piece and the two middle check blocks; the pressure-bearing die is movably arranged in the forming section, and the hydraulic module comprises a hydraulic source and a control channel. According to the cylinder type rubber bag hydraulic machine, a rubber bag pressurization mode is adopted for carrying out forming machining on a metal plate, and the cylinder type rubber bag hydraulic machine has the advantages of being wide in application range and high in forming quality.

Description

Technical Field

[0001] The invention relates to hydraulic processing equipment, in particular to a cylindrical rubber bag hydraulic press and a hydraulic processing method. Background Art

[0002] Metal sheet is a common metal structural part, which is widely used in shell pressure bearing, plastic shaping, moving parts enclosure and other occasions. Metal sheet is mainly formed by sheet metal process, including shearing, punching, folding, welding and other process steps, usually using shearing machine, punching machine, bending machine and other equipment for production and processing.

[0003] However, for some metal sheet parts with higher requirements, the existing traditional processing technology is difficult to achieve. For example, in occasions such as aircraft fuselages and missiles that have high requirements for sheet integrity and surface quality, the existing processing technology is difficult to meet the processing needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a cylindrical rubber bag hydraulic press and a hydraulic processing method, which adopts a rubber bag pressurization method to form metal plates, and has the advantages of wide application range and high forming quality.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a cylindrical rubber bag hydraulic press, comprising at least: A frame, wherein the frame comprises a molding base and an operating table, and the operating table is located on one side of the molding base; A molding module, wherein the molding module comprises a cylinder, an upper mold assembly and a lower mold assembly; the molding cylinder is horizontally arranged on a molding base, a cylindrical pressurizing chamber is arranged in the molding cylinder, the upper mold assembly and the lower mold assembly are movably arranged in the pressurizing chamber, and the operating table is aligned with the pressurizing chamber; The upper mold assembly includes a support member and a pressure member, the upper side surface of the support member is tightly matched with the inner wall of the pressurized cavity, the pressure member is located below the support member and connected to the support member; the pressure member includes a rubber bag; The lower mold assembly includes a lower pad and a pressure-bearing mold. The lower side of the lower pad is tightly matched with the inner wall of the pressurized cavity. The lower pad and the support are vertically opposed. Two intermediate blocks are arranged between the lower pad and the support. The outer sides of the two intermediate blocks are tightly matched with the inner wall of the pressurized cavity. The lower pad, the support and the two intermediate blocks together enclose a molding interval. The pressure-bearing mold is separately arranged from the lower pad and movably arranged in the molding interval. The upper side of the pressure-bearing mold is provided with a mold cavity corresponding to the rubber bag. The hydraulic module comprises a hydraulic source and a control channel, wherein the control channel communicates with the hydraulic source and the rubber bag.

[0006] During processing, the sheet blank is placed in the mold cavity, and high-pressure liquid is passed into the rubber bag through the hydraulic module to pressurize it. The rubber bag expands and deforms and extends into the mold cavity to extrude the sheet blank. The rubber bag and the pressure-bearing die work together to extrude the sheet into shape.

[0007] During the molding process, the molding pressure is transmitted to the cylinder through the support, lower pad and middle block, and is borne by the cylinder. The molding module can achieve force balance in the circumferential direction. The pressure at both ends of the axial direction is borne by the support and the pressure-bearing die, and the molding pressure will not be transmitted to the frame. The molding process has little impact on the external support, and the equipment stability is very good.

[0008] Since the forming pressure is provided by the expansion of the hydraulically driven rubber bag, the forming process is smooth. At the same time, due to the elastic characteristics of the rubber bag, the pressure on each part of the plate is balanced, and the forming quality and surface quality of the plate are very good. Compared with traditional stamping dies, the rubber bag pressure forming has less restrictions on the area, and can process large-area and thick-thick plates, as well as small-area and thin-thick plates. The movable setting of the pressure-bearing die not only facilitates the loading and unloading operations of the plate, but also realizes the change of product shape by replacing the pressure-bearing die, which is very flexible to use.

[0009] The cylindrical rubber bag hydraulic press of the present application uses a rubber bag pressurization method to form metal plates, and has the advantages of a wide range of applications and high forming quality.

[0010] Preferably, there are two operating tables, the molding base is located between the two operating tables, the pressure-bearing mold corresponds to the operating tables one by one, and the two operating tables can perform loading and unloading operations in turn to improve processing efficiency.

[0011] Preferably, the support member comprises an upper pad and a containing frame, wherein the containing frame is located below the upper pad and connected to the upper pad; The lower side of the container frame is provided with two limiting protrusions, which are located at the end of the pressurizing cavity and are arranged through the lower side of the container frame in the width direction. The two limiting protrusions are between a receiving area, and the pressure member is located in the receiving area and connected to the container frame.

[0012] The containing frame is used for connecting and limiting the pressure piece. During the processing and forming process, the circumferential pressure of the pressure piece is directly transmitted to the inner wall of the cylinder and borne by the cylinder, while the end pressure is borne by the two limiting protrusions.

[0013] Preferably, the end of the rubber bag contacts the limiting protrusion, and the lower edges of the corresponding ends of the rubber bag and the limiting protrusion are provided with a sealing profile made of rigid material; the lower side of the limiting protrusion is connected to a plurality of limiting plug plates, which extend to the bottom of the sealing profile and cooperate with the sealing profile to limit the position.

[0014] The rubber bag will expand in all directions during the pressurization process, and there is a possibility that it will expand and extend into the gap between the container frame and the pressure mold in the end direction. The deformation of the rubber bag into the above gap will have a certain impact on the structural stability and service life of the rubber bag. By setting a rigid sealing profile, the end deformation of the rubber bag can be limited, effectively preventing the rubber bag from expanding and extending into the gap between the container frame and the pressure mold. The limit plug can limit the sealing profile, limit the minimum height of the sealing profile, and prevent the sealing profile from interfering with the loading and unloading operations of the pressure mold.

[0015] Preferably, the intermediate stop block includes a main block and a wedge block, and each of the two ends of the main block corresponds to a wedge block; the lower side surface of the main block contacts the lower pad block, and the wedge block is arranged between the main block and the support member; the upper end surface and the lower end surface of the wedge block are arranged relatively inclined.

[0016] Preferably, the operating table is provided with a guide rail, the guide rail is arranged parallel to the center line of the pressure chamber, and the pressure-bearing mold is provided with a plurality of walking units corresponding to the guide rail, and the walking units include rollers; The lower pad is provided with countersunk holes corresponding to the walking units one by one, and a floating assembly is arranged in the countersunk hole. The floating assembly includes a floating plate and a floating elastic member, and the floating plate is arranged in the countersunk hole to float up and down through the floating elastic member.

[0017] When loading and unloading the pressure-bearing die, the pressure-bearing die rolls along the guide rail through the walking unit, which is very convenient to operate. During the pressure forming process, as the pressure increases, the walking unit can press the floating elastic part through the floating plate, and the pressure-bearing die moves down until the body of the pressure-bearing die contacts the lower pad. The pressure during the forming process is mainly borne by the body of the pressure-bearing die, and the pressure borne by the walking unit is limited, which can play a role in protecting the moving parts. After the forming process is completed, as the pressure is removed, the floating component drives the pressure-bearing die and the roller to reset upward, which facilitates the disassembly operation of the pressure-bearing die.

[0018] Preferably, the pressure member further comprises a core plate made of a rigid material, the core plate is connected to the support member, the core plate comprises a connecting block and a sealing convex edge, the sealing convex edge is arranged in an annular shape around the connecting block, and the upper end surface of the sealing convex edge is lower than the upper end surface of the connecting block; The upper end of the rubber bag is open to form a sealing opening; the core plate extends into the rubber bag from the sealing opening, and the edge of the sealing opening extends between the sealing convex edge and the support member. The core plate and the support member jointly press the edge of the sealing opening to achieve sealing of the sealing opening.

[0019] Preferably, the core plate is connected to the support member via a floating connector, the floating connector is connected to the support member in an up and down floating manner, the floating connector is fixedly connected to the core plate and floats up and down synchronously; the up and down floating distance of the floating connector relative to the support member is denoted as L, the thickness of the core plate is denoted as S, L=0.05S~0.1S.

[0020] When the rubber bag is pressurized, the core plate moves upward under the action of the internal pressure, the distance between the sealing flange and the support member decreases, and the pressing force of the sealing flange on the edge of the sealing port increases, which can achieve a certain self-sealing effect and ensure the sealing performance.

[0021] Preferably, an oil delivery channel is provided in the support member, and an oil hole is provided on the core plate, and the oil hole passes through the core plate from top to bottom; the first end of the oil delivery channel is located at the end of the support member and is connected to the control channel, and the second end of the oil delivery channel is located on the lower side of the support member and is connected to the oil hole on the core plate.

[0022] A hydraulic processing method, using the cylindrical rubber bag hydraulic press as described above; At least the following steps are included: S1. Installation: Place the pressure-bearing die on the operating table and the plate blank to be processed in the die cavity; transfer the pressure-bearing die and the plate blank as a whole to the forming area; S2. Pressurized molding: The hydraulic module works, injecting high-pressure liquid into the rubber bag, the rubber bag expands downward and gradually extends into the mold cavity, the rubber bag squeezes the sheet blank and forms it; S3. Pressure relief: After the preset pressure holding time, the hydraulic module works to discharge the liquid in the rubber bag and evacuates the rubber bag, causing the rubber bag to shrink and exit from the mold cavity; S4. Unloading: Take the pressure die out of the forming area and transfer it to the operating table, and take out the processed sheet from the pressure die. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the cylindrical rubber bag hydraulic press of this embodiment; Figure 2 This is a schematic diagram of the structure of the cylindrical rubber bag hydraulic press of this embodiment, which does not include the hydraulic module; Figure 3 Schematic diagram of the structure of the forming module in the cylindrical rubber bag hydraulic press of this embodiment, wherein the pressure-bearing mold is located in the cylinder; Figure 4 It is a side view of the forming module in the cylindrical rubber bag hydraulic press of this embodiment; Figure 5 Schematic diagram of the structure of the forming module in the cylindrical rubber bag hydraulic press of this embodiment, wherein the pressure-bearing mold is located outside the cylinder; Figure 6 This is a schematic diagram of the structure of the cooperation between the loading and unloading drive assembly and the pressure-bearing die in the cylindrical rubber bag hydraulic press of this embodiment; Figure 7 for Figure 6 A partial enlarged view of the middle A; Figure 8 It is a cross-sectional view of the pressure-bearing module in the cylindrical rubber bag hydraulic press of this embodiment; Fig. 9 for Figure 8 A partial enlarged view of point B in the middle; Fig.10 for Figure 8 A partial enlarged view of point C in the middle; Fig.11 This is a schematic diagram of the structure of the pressure member and the containing frame in the cylindrical rubber bag hydraulic press of this embodiment; Fig.12 It is a structural schematic diagram of the cooperation between the pressure-applying member and the containing frame in the cylindrical rubber bag hydraulic press of this embodiment from another perspective; Fig.13 This is an exploded view of the cooperation between the pressure applying member and the containing frame of the cylindrical rubber bag hydraulic press of this embodiment; Fig.14 An exploded view of the pressure member in the cylindrical rubber bag hydraulic press of this embodiment; Fig.15 This is a schematic structural diagram of the pressure-bearing die in the cylindrical rubber bag hydraulic press of this embodiment; Fig.16 It is a schematic structural diagram of the cooperation between the pressure-bearing die and the floating assembly in the cylindrical rubber bag hydraulic press of this embodiment. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention 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 invention and are not intended to limit the present invention. Example

[0025] like Figure 1 and Figure 2 As shown, a cylindrical rubber bag 272 hydraulic press comprises a frame, a molding module 2 and a hydraulic module 3. The frame comprises a molding base 12 and an operating table 11, and the operating table 11 is located on one side of the molding base 12. Specifically, there are two operating tables 11, and the molding base 12 is located between the two operating tables 11.

[0026] like Figure 1-Figure 4As shown, the molding module 2 includes a cylinder 22, an upper mold assembly 23 and a lower mold assembly. The molding cylinder 22 is horizontally arranged on the molding base 12, a cylindrical pressurizing chamber is arranged in the molding cylinder 22, the upper mold assembly and the lower mold assembly are movably arranged in the pressurizing chamber, and the operating table 11 is aligned with the pressurizing chamber. Since the cylinder 22 is the main pressure-bearing part, a reinforcement ring is arranged on the outer side of the cylinder 22. As a specific embodiment, reinforcement rings are respectively arranged at both ends of the cylinder 22.

[0027] like Figure 3 , Figure 4 and Figure 8 As shown, the upper mold assembly 23 includes a support member and a pressure member 27. The upper side surface of the support member is tightly matched with the inner wall of the pressurized chamber. The pressure member 27 is located below the support member and connected to the support member.

[0028] like Figure 3 , Figure 4 and Figure 8 As shown, the support member includes an upper pad 231 and a frame 232. The frame 232 is located below the upper pad 231 and connected to the upper pad 231. Figure 11-13 As shown, two limiting protrusions 2321 are provided on the lower side of the containing frame 232. The limiting protrusions 2321 are located at the end of the pressurizing chamber and are arranged through the lower side of the containing frame 232 along the width direction. The containing interval 2322 is between the two limiting protrusions 2321. The pressure member 27 is located in the containing interval 2322 and is connected to the containing frame 232.

[0029] The containing frame 232 is used for connecting and limiting the pressure member 27 . During the processing and forming process, the circumferential pressure of the pressure member 27 is directly transmitted to the inner wall of the cylinder 22 and borne by the cylinder 22 , while the end pressure is borne by the two limiting protrusions 2321 .

[0030] like Figure 8-Figure 10 As shown, the pressure member 27 comprises a rubber bag 272 made of elastic material and a core plate 271 made of rigid material. The upper end of the rubber bag 272 is open and forms a sealing opening. The rubber bag 272 comprises an inner tube 2722 and an outer tube 2721. The inner tube 2722 is made of polyurethane glue or nitrile glue, and the outer tube 2721 is made of rubber. The inner tube 2722 and the outer tube 2721 can slide relative to each other. During processing, the inner tube 2722 plays a major sealing role, while the outer tube 2721 plays a major pressure-bearing role and deforms with the mold to force the plate to form.

[0031] like Fig. 9 and Fig.14As shown, the core plate 271 is connected to the support member, and the core plate 271 includes a connection block 2712 and a sealing flange 2713. The sealing flange 2713 is arranged in an annular shape around the connection block 2712, and the upper end surface of the sealing flange 2713 is lower than the upper end surface of the connection block 2712. The upper end surface of the sealing flange 2713 is arranged to be inclined upward from the inside to the outside.

[0032] like Fig. 9 and Fig.14 As shown, the core plate 271 extends from the sealing opening into the rubber bag 272, and the edge of the sealing opening extends between the sealing flange 2713 and the support member. The core plate 271 and the support member jointly press the edge of the sealing opening to achieve sealing of the sealing opening.

[0033] Furthermore, the core plate 271 is connected to the support member through a floating connection member, the floating connection member is connected to the support member in an up-and-down floating manner, and the floating connection member is fixedly connected to the core plate 271 and floats up and down synchronously. The up-and-down floating distance of the floating connection member relative to the support member is recorded as L, and the thickness of the core plate 271 is recorded as S, where L=0.05S~0.1S.

[0034] When the rubber bag 272 is pressurized, the core plate 271 moves upward under the action of the internal pressure, the distance between the sealing flange 2713 and the support member decreases, and the pressing force of the sealing flange 2713 on the edge of the sealing port increases, which can achieve a certain self-sealing effect and ensure the sealing performance.

[0035] like Figure 3-Figure 5 As shown, the lower mold assembly includes a lower pad 25 and a pressure-bearing mold 21. The lower side surface of the lower pad 25 is tightly matched with the inner wall of the pressurized cavity. The lower pad 25 and the support are arranged vertically opposite to each other. Two intermediate blocks 26 are arranged between the lower pad 25 and the support. The outer sides of the two intermediate blocks 26 are tightly matched with the inner wall of the pressurized cavity. The intermediate blocks 26 play a supporting role between the lower pad 25 and the support. The lower pad 25, the support and the two intermediate blocks 26 together enclose a molding area.

[0036] It should be noted that the surfaces that fit closely with the pressurized chamber wall, namely the upper side surface of the support member, the upper side surface of the lower pad, and the outer side surface of the middle stop block are all curved surfaces with the same curvature as the inner wall of the pressurized chamber, wherein the upper side surface of the support member includes the upper side surface of the upper pad and the outer side surface of the frame.

[0037] like Figure 4As shown, specifically, the intermediate stopper 26 includes a main block 262 and a wedge block 261, and each of the two ends of the main block 262 corresponds to a wedge block 261. The lower side surface of the main block 262 contacts the lower pad 25, and the wedge block 261 is arranged between the main block 262 and the support member. The upper end surface and the lower end surface of the wedge block 261 are arranged to be inclined relative to each other, and correspondingly, the support member is provided with an inclined surface matching the wedge block 261. Specifically, a wedge groove is provided on the lower side surface of the upper limit projection 2321 of the container frame 232, the width of the wedge groove matches the wedge block 261, and the bottom surface of the wedge groove is an inclined surface matching the wedge block 261.

[0038] like Figure 4 As shown, a first lateral positioning assembly is provided between the main block 262 and the lower pad 25, and a second lateral positioning assembly is provided between the main block 262 and the wedge block 261. The first lateral positioning assembly includes a first positioning groove and a first positioning block provided in parallel with the main block 262, one of which is provided on the main block 262, and the other is provided on the lower pad 25. The second lateral positioning assembly includes a second positioning groove and a second positioning block provided in parallel with the main block 262, one of which is provided on the main block 262, and the other is provided on the wedge block 261.

[0039] like Figure 1-Figure 5 As shown, the pressure-bearing mold 21 and the lower pad 25 are separately arranged and movably arranged in the molding area. The upper side of the pressure-bearing mold 21 is provided with a mold cavity 212 corresponding to the rubber bag 272. There are two pressure-bearing molds 21, and they correspond one to one with the operating tables 11. The two operating tables 11 can be loaded and unloaded in turn to improve processing efficiency.

[0040] Specifically, Fig.15 As shown, the pressure-bearing mold 21 includes a main body, and two pressure-bearing bosses are provided on the upper surface of the main body. Two deformation baffles 211 are connected between the two pressure-bearing bosses. The pressure-bearing bosses and the deformation baffles 211 together enclose a mold cavity 212, and the deformation baffles 211 are arranged close to the side of the pressure-bearing bosses. During the molding process, the deformation baffles 211 are arranged opposite to the middle block 26. Under the deformation pressure of the rubber bag 272, the deformation baffles 211 deform outwards and contact the middle block 26, transferring the pressure to the middle block 26, and finally being borne by the cylinder 22. When the deformation pressure of the rubber bag 272 is removed, the deformation baffles 211 reset inwards and separate from the middle block 26, so as to facilitate the overall removal of the pressure-bearing mold 21.

[0041] Specifically, Fig. 9As shown, the end of the rubber bag 272 contacts the limiting protrusion 2321, and the lower edges of the corresponding ends of the rubber bag 272 and the limiting protrusion 2321 are provided with a sealing profile 2723 made of a rigid material. The lower side of the limiting protrusion 2321 is connected to a plurality of limiting plugs 28, which extend to the bottom of the sealing profile 2723 and cooperate with the sealing profile 2723 to limit the position.

[0042] The rubber bag 272 will expand in all directions during the pressurization process, and there is a possibility that it will expand and extend into the gap between the container frame 232 and the pressure-bearing mold 21 in the end direction. The deformation of the rubber bag 272 into the above gap will have a certain impact on the structural stability and service life of the rubber bag 272. By setting a rigid sealing profile 2723, the end-to-end deformation of the rubber bag 272 can be limited, and the rubber bag 272 can be effectively prevented from expanding and extending into the gap between the container frame 232 and the pressure-bearing mold 21. The limiting plug plate 28 can limit the sealing profile 2723, limit the minimum height of the sealing profile 2723, and prevent the sealing profile 2723 from interfering with the loading and unloading operations of the pressure-bearing mold 21.

[0043] like Fig.10 As shown, the hydraulic module 3 includes a hydraulic source and a control channel, and the control channel is connected to the hydraulic source and the rubber bag 272. An oil delivery channel 31 is provided in the support member, and an oil hole is provided on the core plate 271, and the oil hole is arranged through the core plate 271 from top to bottom. The first end of the oil delivery channel 31 is located at the end of the support member and is connected to the control channel, and the second end of the oil delivery channel 31 is located at the lower side of the support member and is connected to the oil hole on the core plate 271.

[0044] like Fig.10 As shown, specifically, in order to cooperate with the up and down floating design of the core plate 271, an oil inlet nozzle 2321 is fixedly arranged on the support member, the oil inlet nozzle 2321 is connected to the second section of the oil delivery channel 31, and is inserted into the oil hole, and the oil inlet nozzle 2321 and the oil hole are axially slidably sealed. Specifically, an oil inlet seat 2711 is arranged in the oil hole, and the oil inlet nozzle 2321 and the oil inlet seat 2711 are axially slidably sealed.

[0045] The hydraulic source includes an oil storage tank, a main pump and a vacuum pump, and the control channel includes a pressurization branch, a pressure relief branch and a vacuum branch arranged in parallel. The pressurization branch is connected to the oil storage tank through the main pump, the pressure relief branch is directly connected to the oil storage tank, and the vacuum branch is connected to the oil storage tank through the vacuum pump.

[0046] The pressurization branch includes a main pressurization branch and a boosting branch arranged in parallel, and a booster is provided on the boosting branch. The pressurization process is divided into two stages. In the first stage, the main pump directly pressurizes through the main pressurization branch to deliver 0.9~0.95 of the preset oil volume, and then the main pump pressurizes through the boosting branch. The first stage can quickly infuse, while the second stage can ensure that the pressurized pressure reaches the preset value.

[0047] The pressure relief branch is provided with a booster. When the pressure is relieved, the hydraulic oil in the rubber bag 272 is first discharged into the oil storage tank through the pressure relief branch, and then the vacuum pump works to create a negative pressure in the rubber bag 272. The setting of the booster on the pressure relief branch can control the pressure relief speed and avoid the pressure from dropping too fast. The setting of the vacuum pump can ensure that the rubber bag 272 is fully contracted and completely withdrawn from the mold cavity 212.

[0048] In order to ensure the smooth and reliable vacuuming operation, the lower surface of the core plate 271 is recessed inward to form a vacuum groove, the oil hole is located in the vacuum groove area, and a number of support blocks 273 are distributed in the vacuum groove. When the vacuuming operation is performed, due to the obstruction of the support blocks 273, the inner wall of the rubber bag 272 in the vacuum groove area cannot fit with the bottom surface of the vacuum groove, and there is always a gap, thereby ensuring that the oil hole will not be blocked and the vacuuming operation can be performed smoothly.

[0049] During processing, the sheet blank is placed in the mold cavity 212, and high-pressure liquid is introduced into the rubber bag 272 through the hydraulic module 3 to pressurize it. The rubber bag 272 expands and deforms and extends into the mold cavity 212 to extrude the sheet blank. The rubber bag 272 cooperates with the pressure-bearing die 21 to extrude the sheet into shape.

[0050] During the molding process, the molding pressure is transmitted to the cylinder 22 through the support, the lower pad 25 and the middle stopper 26, and is borne by the cylinder 22, so that the molding module 2 can achieve force balance in the circumferential direction. The pressure at both ends of the axial direction is borne by the support and the pressure-bearing die 21, and the molding pressure will not be transmitted to the frame. The molding process has little impact on the external support, and the equipment stability is very good.

[0051] Since the molding pressure is provided by the expansion of the hydraulically driven rubber bag 272, the molding process is smooth. At the same time, due to the elastic characteristics of the rubber bag 272, the pressure on each part of the plate is balanced, and the molding quality and surface quality of the plate are very good. Compared with traditional stamping dies, the rubber bag 272 pressure molding has less restrictions on the area, and can process large-area and thick-thick plates, as well as small-area and thin-thick plates. The movable setting of the pressure-bearing mold 21 can not only facilitate the loading and unloading operations of the plate, but also realize the product change by replacing the pressure-bearing mold 21, and has good flexibility in use.

[0052] The cylindrical rubber bag 272 hydraulic press of the present application uses the rubber bag 272 to pressurize the metal plate to form the metal plate, which has the advantages of wide application range and high forming quality.

[0053] Furthermore, the operating table 11 is provided with a guide rail, and the guide rail is arranged parallel to the center line of the pressurized chamber. Fig.15 As shown, the pressure-bearing mold 21 is provided with a plurality of walking units 213 corresponding to the guide rails, and the walking units 213 include rollers. Fig.16 As shown, the lower pad 25 is provided with countersunk holes corresponding to the walking units 213 one by one, and a floating component 29 is provided in the countersunk hole. The floating component 29 includes a floating plate 291 and a floating elastic member 292. The floating plate 291 is arranged in the countersunk hole to float up and down through the floating elastic member 292.

[0054] When loading and unloading the pressure-bearing mold 21, the pressure-bearing mold 21 rolls along the guide rail through the walking unit 213, and the operation is very convenient. During the pressure forming process, as the pressure increases, the walking unit 213 can press the floating elastic member 292 through the floating plate 291, and the pressure-bearing mold 21 moves downward until the body of the pressure-bearing mold 21 contacts the lower pad 25. The pressure during the forming process is mainly borne by the body of the pressure-bearing mold 21, and the pressure borne by the walking unit 213 is limited, which can play a role in protecting the moving parts. After the forming process is completed, as the pressure is removed, the floating assembly 29 drives the pressure-bearing mold 21 and the roller to reset upward, which facilitates the disassembly operation of the pressure-bearing mold 21.

[0055] Specifically, Figure 6 and Figure 7 As shown, the operating table 11 is further provided with a loading and unloading driving assembly 13, which includes a transmission block 132 and a driving cylinder 131. The transmission block 132 is fixedly connected to the pressure-bearing die 21. The transmission block 132 is provided with a connecting hole, and the transmission rod is connected to the transmission block 132 through the connecting hole. The loading and unloading driving assembly 13 can drive the pressure-bearing die 21 to move, thereby realizing automatic loading and unloading operations.

[0056] Specifically, Figure 7 As shown, the connecting hole is a long strip hole extending in the vertical direction. The long strip hole leaves a certain space for the transmission block 132 to move up and down relative to the driving cylinder 131, and correspondingly, space can be left for the movement of the pressure-bearing mold 21 during processing.

[0057] Furthermore, if Figure 3As shown, the molding module 2 further includes a serial connection component, which includes a serial connection rod and a plurality of serial connection ears 24. Each of the serial connection ears 24 is provided with a serial connection hole, and the serial connection rod matches the serial connection hole. The serial connection component is located at at least one end of the cylinder 22, and can also be provided at both ends. The cylinder 22, the upper pad 231, the frame 232, the lower pad 25 and the pressure-bearing mold 21 are respectively provided with serial connection ears 24. During the molding process, the serial connection holes on the serial connection ears 24 at the same end of the cylinder 22 are aligned up and down.

[0058] The serial connection assembly can play an axial positioning role for the upper mold assembly and the lower mold assembly during the loading and unloading process of the molding module 2 assembly machine to ensure the axial installation accuracy. In addition, when the rubber bag 272 breaks during the processing, it will make it difficult to withdraw the pressure-bearing mold 21. At this time, the upper mold and the lower mold can be connected in series through the serial connection assembly, and the whole can be pulled out of the pressurized chamber for maintenance.

[0059] Furthermore, a loading positioning assembly is provided between the pressure-bearing die 21 and the lower pad 25, and the loading positioning assembly includes a movable positioning block and a fixed positioning pin, wherein the movable positioning block is provided on the pressure-bearing die 21, and the fixed positioning pin is provided on the lower pad 25. The movable positioning block is provided with a movable positioning hole, and during the molding process, the movable positioning hole cooperates with the fixed positioning pin. In order to improve the degree of automation, a switch can be provided between the movable positioning block and the fixed positioning pin.

[0060] A hydraulic processing method, using the cylindrical rubber bag 272 hydraulic press as described above; At least the following steps are included: S1. Installation: Place the pressure-bearing mold 21 on the operating table 11 , and place the plate blank to be processed in the mold cavity 212 ; transfer the pressure-bearing mold 21 and the plate blank as a whole to the forming area.

[0061] S2. Pressurization molding: The hydraulic module 3 works. First, the main pump injects hydraulic oil into the rubber bag 272 through the main pressurization branch to 0.9~0.95 of the preset oil injection amount. Then it switches to the booster branch. The main pump continues to inject hydraulic oil into the rubber bag 272 through the booster until the preset oil injection amount is reached. During the oil injection process, the rubber bag 272 expands downward and gradually extends into the mold cavity 212. The rubber bag 272 squeezes the sheet blank and forms it.

[0062] S3. Pressure relief: After the preset pressure time, the hydraulic oil is slowly discharged into the oil storage tank through the booster in the pressure relief branch, and the oil pressure in the rubber bag 272 drops to the preset level. The vacuum pump works to continue to discharge the hydraulic oil in the rubber bag 272 until negative pressure is formed in the rubber bag 272. In the process of discharging the hydraulic oil, the rubber bag 272 shrinks and withdraws from the mold cavity 212.

[0063] S4. Unloading: The pressure-bearing mold 21 is taken out from the forming area and transferred to the operating table 11 , and the processed sheet is taken out from the pressure-bearing mold 21 .

[0064] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cylindrical rubber bag hydraulic press, characterized in that: At least: A frame, wherein the frame comprises a molding base and an operating table, and the operating table is located on one side of the molding base; A molding module, wherein the molding module comprises a cylinder, an upper mold assembly and a lower mold assembly; the molding cylinder is horizontally arranged on a molding base, a cylindrical pressurizing chamber is arranged in the molding cylinder, the upper mold assembly and the lower mold assembly are movably arranged in the pressurizing chamber, and the operating table is aligned with the pressurizing chamber; The upper mold assembly includes a support member and a pressure member, the upper side surface of the support member is tightly matched with the inner wall of the pressurized cavity, the pressure member is located below the support member and connected to the support member; the pressure member includes a rubber bag; The lower mold assembly includes a lower pad and a pressure-bearing mold. The lower side of the lower pad is tightly matched with the inner wall of the pressurized cavity. The lower pad and the support are vertically opposed. Two intermediate blocks are arranged between the lower pad and the support. The outer sides of the two intermediate blocks are tightly matched with the inner wall of the pressurized cavity. The lower pad, the support and the two intermediate blocks together enclose a molding interval. The pressure-bearing mold is separately arranged from the lower pad and movably arranged in the molding interval. The upper side of the pressure-bearing mold is provided with a mold cavity corresponding to the rubber bag. The hydraulic module comprises a hydraulic source and a control channel, wherein the control channel communicates with the hydraulic source and the rubber bag.

2. The cylindrical rubber bag hydraulic press according to claim 1, characterized in that: There are two operating tables, and the molding base is located between the two operating tables; the pressure-bearing mold corresponds to the operating tables one by one.

3. The cylindrical rubber bag hydraulic press according to claim 1, characterized in that: The support member includes an upper pad and a containing frame, wherein the containing frame is located below the upper pad and connected to the upper pad; The lower side of the container frame is provided with two limiting protrusions, which are located at the end of the pressurizing cavity and are arranged through the lower side of the container frame in the width direction. The two limiting protrusions are between a receiving area, and the pressure member is located in the receiving area and connected to the container frame.

4. The cylindrical rubber bag hydraulic press according to claim 3, characterized in that: The end of the rubber bag contacts the limiting protrusion, and the lower edges of the corresponding ends of the rubber bag and the limiting protrusion are provided with sealing profiles made of rigid materials; the lower side of the limiting protrusion is connected to a plurality of limiting plugs, which extend to the bottom of the sealing profile and cooperate with the sealing profile to limit.

5. The cylindrical rubber bag hydraulic press according to claim 1, characterized in that: The intermediate stopper includes a main block and a wedge block, and each of the two ends of the main block corresponds to a wedge block; the lower side of the main block contacts the lower pad, and the wedge block is arranged between the main block and the support member; the upper end face and the lower end face of the wedge block are arranged relatively inclined.

6. The cylindrical rubber bag hydraulic press according to claim 1, characterized in that: The operating table is provided with a guide rail, which is arranged parallel to the center line of the pressure chamber, and the pressure-bearing mold is provided with a plurality of walking units corresponding to the guide rail, and the walking units include rollers; The lower pad is provided with countersunk holes corresponding to the walking units one by one, and a floating assembly is arranged in the countersunk hole. The floating assembly includes a floating plate and a floating elastic member, and the floating plate is arranged in the countersunk hole to float up and down through the floating elastic member.

7. The cylindrical rubber bag hydraulic press according to any one of claims 1 to 6, characterized in that: The pressure member further comprises a core plate made of a rigid material, the core plate is connected to the support member, the core plate comprises a connection block and a sealing convex edge, the sealing convex edge is arranged in an annular shape around the connection block, and the upper end surface of the sealing convex edge is lower than the upper end surface of the connection block; The upper end of the rubber bag is open to form a sealing opening; the core plate extends into the rubber bag from the sealing opening, and the edge of the sealing opening extends between the sealing convex edge and the support member. The core plate and the support member jointly press the edge of the sealing opening to achieve sealing of the sealing opening.

8. The cylindrical rubber bag hydraulic press according to claim 7, characterized in that: The core plate is connected to the support member through a floating connector, the floating connector is connected to the support member in an up and down floating manner, the floating connector is fixedly connected to the core plate and floats up and down synchronously; the up and down floating distance of the floating connector relative to the support member is recorded as L, the thickness of the core plate is recorded as S, L=0.05S~0.1S.

9. The cylindrical rubber bag hydraulic press according to claim 7, characterized in that: An oil delivery channel is provided in the support member, and an oil hole is provided on the core plate, and the oil hole passes through the core plate from top to bottom; the first end of the oil delivery channel is located at the end of the support member and is connected to the control channel, and the second end of the oil delivery channel is located on the lower side of the support member and is connected to the oil hole on the core plate.

10. A hydraulic processing method, characterized in that: Using a cylindrical rubber bag hydraulic press as described in any one of claims 1 to 9; At least the following steps are included: S1. Installation: Place the pressure-bearing die on the operating table and the plate blank to be processed in the die cavity; transfer the pressure-bearing die and the plate blank as a whole to the forming area; S2. Pressurized molding: The hydraulic module works, injecting high-pressure liquid into the rubber bag, the rubber bag expands downward and gradually extends into the mold cavity, the rubber bag squeezes the sheet blank and forms it; S3. Pressure relief: After the preset pressure holding time, the hydraulic module works to discharge the liquid in the rubber bag and evacuates the rubber bag, causing the rubber bag to shrink and exit from the mold cavity; S4. Unloading: Take the pressure die out of the forming area and transfer it to the operating table, and take out the processed sheet from the pressure die.

Images