Quick die changing device and method for gas-liquid mixed pressing forming

Abstract

The invention relates to the technical field of dies, in particular to a gas-liquid mixing pressing forming rapid die changing device and method.The gas-liquid mixing pressing forming rapid die changing device comprises a press machine sliding block and a press machine working tabletop, an upper plate is fixedly installed at the bottom end of the press machine sliding block, and a first lead screw, a second lead screw, a third lead screw and a fourth lead screw are arranged at the bottom end of the upper plate; a second movable nitrogen spring pressing tool is arranged at the bottom end of the first lead screw and the bottom end of the second lead screw, a first movable nitrogen spring pressing tool is arranged at the bottom end of the fourth lead screw and the bottom end of the third lead screw, and a first nitrogen spring and a fourth nitrogen spring are symmetrically arranged at the bottom end of the first movable nitrogen spring pressing tool. A second nitrogen spring and a third nitrogen spring are arranged at the bottom end of the second movable nitrogen spring pressing tool, and a fixed mold pressing tool is arranged in the center of the bottom end of the upper plate. And through the arrangement of a first nitrogen spring and a second nitrogen spring, the purposes of high die changing efficiency, simple operation, high safety performance and high die adaptability of the pressing forming die changing device are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and specifically to a gas-liquid hybrid press forming rapid die-changing device and method. Background Art

[0002] With the exponential growth of the demand for large-sized special-shaped thin-walled components with spatially curved axes, variable cross-sections, and variable wall thicknesses in fields such as aviation, aerospace, navigation, new energy vehicles, and deep-sea exploration equipment in China, the gas-liquid hybrid press forming technology (a gas-liquid hybrid fluid internal pressure forming method and device for large-sized thin-walled pipe fittings, patent publication number CN110834047A) breaks through the energy efficiency bottleneck of traditional forming processes, reconstructs the pipe fitting manufacturing process with the concept of green forming, and stands out among many forming methods. In the engineering application of the gas-liquid hybrid press forming system, the situation of changing molds often occurs, and the rapid die-changing technology is of great significance for the industrialized popularization and application of the gas-liquid hybrid press forming technology.

[0003] For the replacement of molds in press forming, the currently commonly used methods and devices include traditional bolt-fixed die-changing and mechanical rapid clamping die-changing. Among them, traditional bolt-fixed die-changing relies on manual disassembly and assembly, often requires horizontally moving out the press workbench for handling, and requires multiple handling operations to complete die-changing. After die-changing, manual calibration of the mold position is required, which has problems such as low die-changing efficiency and poor safety. Mechanical rapid clamping die-changing uses a die moving arm to push the mold onto the equipment backing plate, and then uses a mechanical clamping device to complete the locking of the mold. It has certain advantages compared with traditional devices, but still relies on a large amount of manual operation. It still needs to manually adjust the positions of the punch and the die head to match the mold position, which limits the flexibility of mold design. For mass industrial production, the die-changing efficiency still needs to be further improved. The existing press forming die-changing devices and methods have problems such as low die-changing efficiency, high operation complexity, poor safety, and poor mold adaptability, and are difficult to meet the requirements of mass high-efficiency production applications of gas-liquid hybrid press forming. Summary of the Invention

[0004] Aiming at the problems in the prior art, the present invention provides a gas-liquid hybrid press forming rapid die-changing device and method.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a gas-liquid mixed pressing forming rapid mold changing device and method, comprising a press slide and a press worktable, the bottom end of the press slide is fixedly installed with an upper plate, the bottom end of the upper plate is provided with a first lead screw, a second lead screw, a third lead screw and a fourth lead screw, the bottom ends of the first lead screw and the second lead screw are provided with a second movable nitrogen spring press, the bottom ends of the fourth lead screw and the third lead screw are provided with a first movable nitrogen spring press, the bottom end of the first movable nitrogen spring press is symmetrically provided with a first nitrogen spring and a fourth nitrogen spring, the bottom end of the second movable nitrogen spring press is provided with There are a second nitrogen spring and a third nitrogen spring, a fixed mold press is arranged at the bottom center of the upper plate, a first movable mold press is arranged at the bottom ends of the third lead screw and the fourth lead screw, and the first movable mold press is located at one end of the first movable nitrogen spring press close to the fixed mold press, a fourth movable mold press fixture and a first movable mold press fixture are arranged at the bottom end of the first movable mold press, a second movable mold press is arranged at one end of the second lead screw and the first lead screw close to the fixed mold press, and a second movable mold press fixture and a third movable mold press fixture are arranged at the bottom end of the second movable mold press.

[0006] Specifically, a first cylinder fixing device and a second cylinder fixing device are fixedly installed at both ends of the top of the work table of the press machine, a first cylinder is fixedly installed on the side end of the first cylinder fixing device, a first punch is fixedly installed on the side end of the first cylinder away from the first cylinder fixing device, a lower plate is slidably installed at the top center of the work table of the press machine, a first lower mold fixture, a second lower mold fixture, a third lower mold fixture and a fourth lower mold fixture are installed inside the top of the lower plate, a ball linear guide is installed inside the lower plate, a second cylinder is fixedly installed on the side end of the second cylinder fixing device, a second punch is fixedly installed on the side end of the second cylinder away from the second cylinder fixing device, a lower mold is installed on the top of the lower plate, an upper mold is placed on the top of the lower mold, a first mold side plate and a second mold side plate are arranged at both ends of the top of the lower plate, a second I-shaped connecting device and a first I-shaped connecting device are arranged at the top of the second mold side plate, and a third I-shaped connecting device and a fourth I-shaped connecting device are arranged at the top of the first mold side plate.

[0007] Specifically, the first lead screw, the second lead screw, the third lead screw and the fourth lead screw are hand-cranked lead screws.

[0008] Specifically, the first lead screw, the second lead screw, the third lead screw, and the fourth lead screw are electric lead screws.

[0009] Specifically, the first movable die pressing fixture, the second movable die pressing fixture, the third movable die pressing fixture, the fourth movable die pressing fixture, the first lower die fixture, the second lower die fixture, the third lower die fixture, and the fourth lower die fixture are hydraulic fixtures.

[0010] Specifically, the first movable die pressing fixture, the second movable die pressing fixture, the third movable die pressing fixture, the fourth movable die pressing fixture, the first lower die fixture, the second lower die fixture, the third lower die fixture, and the fourth lower die fixture are electromagnetic chucks as hydraulic fixtures.

[0011] Specifically, the first oil cylinder further includes an extension cross bar and a first rack. The extension cross bar is fixedly installed at the rear end of the first oil cylinder, and the first rack is fixedly installed at the bottom end of the extension cross bar.

[0012] Specifically, the press workbench surface further includes a first gear, a second gear, a second rack, a contact rod, a support guide rail, a support back plate, a positioning bolt, a displacement cross frame, a rear end bracket, a side end substrate, a sliding key, and a rear end bottom plate. The first gear and the second gear are rotatably installed at both ends of the top of the press workbench surface, and the first gear is located in front of the second gear. The sliding keys are symmetrically slidably inserted into the inner top end of the rear end bottom plate. The rear end bottom plate is fixedly installed at the rear end of the press workbench surface. The support guide rail is fixedly installed at the top end of the sliding key. The support guide rails are symmetrically and fixedly installed at the front end of the support back plate. The displacement cross frame is symmetrically slidably sleeved on the support guide rails. The contact rods are symmetrically fixedly installed at the front end of the displacement cross frame. The positioning bolt is threadedly inserted into the top end of the displacement cross frame. The rear end brackets are symmetrically fixedly installed at the rear end of the support back plate. The side end substrate is fixedly installed at the side end of the rear end bracket. The second rack is fixedly installed at the bottom end of the side end substrate.

[0013] Specifically, the transmission ratio of the first gear to the second gear is 1:10. The second rack meshes with the second gear, and the first rack meshes with the first gear. The thicknesses of the second rack and the first rack are 1 cm, and the thicknesses of both the first gear and the second gear are 3 cm. The top end of the rear end bottom plate is symmetrically provided with slots adapted to the sliding keys, and the positioning bolt is vertically aligned with the support guide rail.

[0014] A method for a gas-liquid hybrid pressing and forming rapid die change device, which includes the following steps:

[0015] Step 1: Start the press, and make the press slider move upward to drive the upper die change device upward to a suitable position;

[0016] Step 2: Import the die into the lower die change device: Remove the ball linear guide from the lower plate, place the lower die, upper die, first die side plate, and second die side plate on the ball linear guide. Confirm that the edges of the first die side plate and the second die side plate are flush with the edge of the lower die, and position them to the middle part. Start the ball linear guide, and use the lower die, upper die, first die side plate, and second die side plate to push them into the center position of the workbench to complete die positioning;

[0017] Step 3: Fix the lower die: Install the first lower die clamp, second lower die clamp, third lower die clamp, and fourth lower die clamp to the appropriate positions and keep them in a clamped state to complete the fixation of the lower die;

[0018] Step 4: Fix the die side plates: Let the slider of the press move downward to drive the upper die change device downward until the first nitrogen spring, second nitrogen spring, third nitrogen spring, and fourth nitrogen spring enter the bottom of the first die side plate and the second die side plate. At the same time, the first movable die holder and the second movable die holder contact the upper die, and insert the first I-shaped connecting device, second I-shaped connecting device, third I-shaped connecting device, and fourth I-shaped connecting device into the gaps between the first movable nitrogen spring holder and the second movable nitrogen spring holder and the first die side plate and the second die side plate respectively to complete the connection between the first die side plate, second die side plate and the first movable nitrogen spring holder, second movable nitrogen spring holder, first nitrogen spring, second nitrogen spring, third nitrogen spring, and fourth nitrogen spring. During the subsequent upward movement of the slider of the press, the first I-shaped connecting device, second I-shaped connecting device, third I-shaped connecting device, and fourth I-shaped connecting device will drive the first die side plate and the second die side plate to move upward to separate from the lower die;

[0019] Step 5: Fix the upper die: Clamp the first movable die holder clamp, second movable die holder clamp, third movable die holder clamp, and fourth movable die holder clamp to clamp each movable die holder with the upper die to complete the fixation of the upper die. When the slider of the press moves upward during the production process, the first movable die holder clamp, second movable die holder clamp, third movable die holder clamp, and fourth movable die holder clamp will drive the upper die to move upward to separate from the lower die;

[0020] Step 6: Dismantle the upper die: Let the slider of the press move downward to drive the upper die change device downward until the bottom of the first die side plate and the second die side plate touches the upper surface of the lower die, and loosen the first movable die holder clamp, second movable die holder clamp, third movable die holder clamp, and fourth movable die holder clamp;

[0021] Step 7: Dismantle the mold: Operate the press to make the slider of the press move downward, driving the upper die-changing device to move upward to a suitable position. Loosen the first lower die clamp, the second lower die clamp, the third lower die clamp, and the fourth lower die clamp, and remove the first lower die clamp, the second lower die clamp, the third lower die clamp, and the fourth lower die clamp. Start the ball linear guide rail, and use the balls to push the mold out of the workbench to complete the mold disassembly.

[0022] Step 8: Install a new mold: Repeat Steps 1 to 5.

[0023] Step 9: Dismantle the new mold: Repeat Steps 6 to 7.

[0024] Advantages of the present invention:

[0025] 1. Aiming at the common features of the gas-liquid hybrid pressing forming mold, the present invention realizes the rapid die change of gas-liquid hybrid pressing forming, greatly reducing the die change time in the production process, improving the overall production efficiency, and at the same time increasing the flexibility of the gas-liquid hybrid pressing forming mold design, and can be compatible with gas-liquid hybrid pressing forming molds of different types and volumes.

[0026] 2. By adopting the ball linear guide rail, the distance that the mold needs to be transported in the laboratory is greatly shortened, and the situation of transporting the mold inside the press workbench is avoided, reducing the time cost and physical labor, improving the work efficiency, and effectively solving the problems of slow speed and poor safety in the existing gas-liquid hybrid die change process.

[0027] 3. Using the screw drive to control the positions of the movable nitrogen spring clamp and the movable mold clamp greatly improves the automation efficiency of the whole system, effectively reduces the positioning difficulty, and at the same time increases the selectivity of the mold volume, effectively solving the problem of low mold standardization degree in the existing gas-liquid hybrid die change process.

[0028] 4. Fixing the movable mold clamp and the movable nitrogen spring clamp through the clamp, and the clamp transmits pressure through the external system, effectively reducing the operation difficulty, and at the same time can provide a clamping force far exceeding that of the traditional bolt or mechanical clamping device, effectively solving the problem of great difficulty in fixing the mold in the existing gas-liquid hybrid mold change process. At the same time, only by pushing the mold into the center of the lower die-changing device can the mold be positioned, and the mold positioning is simple and effective. Description of the Drawings

[0029] The present invention will be further described below in conjunction with the drawings and embodiments.

[0030] Figure 1 It is the front view of the upper die-changing device of the present invention;

[0031] Figure 2 It is the bottom view of the upper die-changing device of the present invention;

[0032] Figure 3 This is the top view of the die change device of the present invention;

[0033] Figure 4 This is the connection schematic diagram of the press, die and oil cylinder of the present invention;

[0034] Figure 5 This is the front view of the connection of the press, die and oil cylinder of the present invention;

[0035] Figure 6 This is the schematic diagram of the connection between the die side plate and the nitrogen spring press tool of the present invention;

[0036] Figure 7 This is the three-dimensional structure schematic diagram of the front view of the second embodiment of the press workbench surface and the first oil cylinder in the present invention;

[0037] Figure 8 This is the three-dimensional structure schematic diagram of the rear view of the first oil cylinder in the present invention;

[0038] Figure 9 This is the partial sectional view of the second embodiment of the press workbench surface in the present invention.

[0039] In the figure: 1 - upper plate, 2 - first lead screw, 3 - second lead screw, 4 - third lead screw, 5 - fourth lead screw, 6 - fixed die press tool, 7 - first movable die press tool, 8 - second movable die press tool, 9 - first movable die press tool clamp, 10 - second movable die press tool clamp, 11 - third movable die press tool clamp, 12 - fourth movable die press tool clamp, 13 - first movable nitrogen spring press tool, 14 - second movable nitrogen spring press tool, 15 - first nitrogen spring, 16 - second nitrogen spring, 17 - third nitrogen spring, 18 - fourth nitrogen spring; 19 - lower plate, 20 - ball linear guide rail, 21 - first lower die clamp, 22 - second lower die clamp, 23 - third lower die clamp, 24 - fourth lower die clamp, 25 - press slider, 26 - press workbench surface, 27 - first oil cylinder fixing device, 28 - second oil cylinder fixing device, 29 - first oil cylinder, 30 - second oil cylinder, 31 - first die side plate, 32 - second die side plate, 33 - first I-shaped connecting device, 34 - second I-shaped connecting device, 35 - third I-shaped connecting device, 36 - fourth I-shaped connecting device, 37 - first punch, 38 - second punch, 39 - lower die, 40 - upper die, 41 - extending cross bar, 42 - first rack, 43 - first gear, 44 - second gear, 45 - second rack, 46 - contact rod, 47 - support guide rail, 48 - support back plate, 49 - positioning bolt, 50 - displacement cross frame, 51 - rear end bracket, 52 - side end base plate, 53 - sliding key, 54 - rear end bottom plate. Detailed implementation mode

[0040] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

[0041] The present invention will be further described below in conjunction with the accompanying drawings.

[0042] Embodiment 1

[0043] As Figures 1-6 shown, a gas-liquid hybrid compression molding rapid die-changing device and method of the present invention includes a press slide block 25 and a press table surface 26. A top plate 1 is fixedly installed at the bottom end of the press slide block 25. At the bottom end of the top plate 1, a first lead screw 2, a second lead screw 3, a third lead screw 4, and a fourth lead screw 5 are provided. At the bottom ends of the first lead screw 2 and the second lead screw 3, a second movable nitrogen spring press tool 14 is provided. At the bottom ends of the fourth lead screw 5 and the third lead screw 4, a first movable nitrogen spring press tool 13 is provided. At the bottom end of the first movable nitrogen spring press tool 13, a first nitrogen spring 15 and a fourth nitrogen spring 18 are symmetrically provided. At the bottom end of the second movable nitrogen spring press tool 14, a second nitrogen spring 16 and a third nitrogen spring 17 are provided. A fixed die press tool 6 is provided at the center of the bottom end of the top plate 1. At the bottom ends of the third lead screw 4 and the fourth lead screw 5, a first movable die press tool 7 is provided, and the first movable die press tool 7 is located at one end of the first movable nitrogen spring press tool 13 close to the fixed die press tool 6. At the bottom end of the first movable die press tool 7, a fourth movable die press tool clamp 12 and a first movable die press tool clamp 9 are provided. At one end of the second lead screw 3 and the first lead screw 2 close to the fixed die press tool 6, a second movable die press tool 8 is provided. At the bottom end of the second movable die press tool 8, a second movable die press tool clamp 10 and a third movable die press tool clamp 11 are provided.

[0044] At both ends of the top of the press worktable surface 26, a first oil cylinder fixing device 27 and a second oil cylinder fixing device 28 are fixedly installed. On the side end of the first oil cylinder fixing device 27, a first oil cylinder 29 is fixedly installed. On the side end of the first oil cylinder 29 facing away from the first oil cylinder fixing device 27, a first punch 37 is fixedly installed. In the center of the top of the press worktable surface 26, a lower plate 19 is slidably installed. Inside the top of the lower plate 19, a first lower die fixture 21, a second lower die fixture 22, a third lower die fixture 23, and a fourth lower die fixture 24 are installed. Inside the lower plate 19, a ball linear guide 20 is installed. On the side end of the second oil cylinder fixing device 28, a second oil cylinder 30 is fixedly installed. On the side end of the second oil cylinder 30 facing away from the second oil cylinder fixing device 28, a second punch 38 is fixedly installed. On the top of the lower plate 19, a lower die 39 is installed. On the top of the lower die 39, an upper die 40 is placed. At both ends of the top of the lower plate 19, a first die side plate 31 and a second die side plate 32 are provided. At the top of the second die side plate 32, a second I-shaped connecting device 34 and a first I-shaped connecting device 33 are provided. At the top of the first die side plate 31, a third I-shaped connecting device 35 and a fourth I-shaped connecting device 36 are provided.

[0045] The first lead screw 2, the second lead screw 3, the third lead screw 4, and the fourth lead screw 5 are hand-operated lead screws. The first lead screw 2, the second lead screw 3, the third lead screw 4, and the fourth lead screw 5 are electric lead screws. The first movable die pressing fixture 9, the second movable die pressing fixture 10, the third movable die pressing fixture 11, the fourth movable die pressing fixture 12, the first lower die fixture 21, the second lower die fixture 22, the third lower die fixture 23, and the fourth lower die fixture 24 are hydraulic fixtures. The first movable die pressing fixture 9, the second movable die pressing fixture 10, the third movable die pressing fixture 11, the fourth movable die pressing fixture 12, the first lower die fixture 21, the second lower die fixture 22, the third lower die fixture 23, and the fourth lower die fixture 24 are electromagnetic chucks.

[0046] A method for a gas-liquid hybrid pressing and forming rapid die change device, which includes the following steps:

[0047] Step 1: Start the press, and make the press slider 25 move upward to drive the upper die change device to move upward to a suitable position;

[0048] Step 2: Import the die into the lower die change device: Move the ball linear guide 20 out of the lower plate 19, place the lower die 39, the upper die 40, the first die side plate 31, and the second die side plate 32 on the ball linear guide 20. Confirm that the edges of the first die side plate 31 and the second die side plate 32 are flush with the edge of the lower die 39, and position them to the middle part. Start the ball linear guide 20, and use the lower die 39, the upper die 40, the first die side plate 31, and the second die side plate 32 to push into the center position of the worktable to complete die positioning;

[0049] Step 3: Fix the lower die: Install the first lower die clamp 21, the second lower die clamp 22, the third lower die clamp 23, and the fourth lower die clamp 24 to the appropriate positions and keep them in a clamped state to complete the fixing of the lower die;

[0050] Step 4: Fix the die side plates: Lower the press slide 25 to drive the upper die changing device downward until the first nitrogen spring 15, the second nitrogen spring 16, the third nitrogen spring 17, and the fourth nitrogen spring 18 enter the bottoms of the first die side plate 31 and the second die side plate 32. At the same time, the first movable die press 7 and the second movable die press 8 contact the upper die 40, and the first I-shaped connecting device 33, the second I-shaped connecting device 34, the third I-shaped connecting device 35, and the fourth I-shaped connecting device 36 are respectively inserted into the gaps between the first movable nitrogen spring press 13 and the second movable nitrogen spring press 14 and the first die side plate 31 and the second die side plate 32 to complete the connection between the first die side plate 31, the second die side plate 32 and the first movable nitrogen spring press 13, the second movable nitrogen spring press 14, the first nitrogen spring 15, the second nitrogen spring 16, the third nitrogen spring 17, and the fourth nitrogen spring 18. During the upward movement of the press slide 25 subsequently, the first I-shaped connecting device 33, the second I-shaped connecting device 34, the third I-shaped connecting device 35, and the fourth I-shaped connecting device 36 will drive the first die side plate 31 and the second die side plate 32 upward to separate from the lower die 39;

[0051] Step 5: Fix the upper die: Clamp the first movable die press clamp 9, the second movable die press clamp 10, the third movable die press clamp 11, and the fourth movable die press clamp 12 to clamp each movable die press with the upper die to complete the fixing of the upper die. When the press slide 25 moves upward during the production process, the first movable die press clamp 9, the second movable die press clamp 10, the third movable die press clamp 11, and the fourth movable die press clamp 12 will drive the upper die 40 upward to separate from the lower die 39;

[0052] Step 6: Dismantle the upper die: Lower the press slide 25 to drive the upper die changing device downward until the bottoms of the first die side plate 31 and the second die side plate 32 touch the upper surface of the lower die 39, and loosen the first movable die press clamp 9, the second movable die press clamp 10, the third movable die press clamp 11, and the fourth movable die press clamp 12;

[0053] Step Seven: Disassemble the mold: Operate the press to make the slider 25 of the press move downward, driving the upper die change device upward to a suitable position. Loosen the first lower die fixture 21, the second lower die fixture 22, the third lower die fixture 23, and the fourth lower die fixture 24, and remove the first lower die fixture 21, the second lower die fixture 22, the third lower die fixture 23, and the fourth lower die fixture 24. Start the ball linear guide 20, and use the balls to push the mold out of the workbench to complete the mold disassembly.

[0054] Step Eight: Install a new mold: Repeat Steps One to Five.

[0055] Step Nine: Disassemble the new mold: Repeat Steps Six to Seven.

[0056] The working principle of Embodiment 1 is as follows: During use, start the press to drive the slider 25 of the press to move upward, driving the upper die changing device to move upward to a suitable position. Then, move the ball linear guide 20 out of the lower plate 19, and place the lower die 39, the upper die 40, the first die side plate 31, and the second die side plate 32 on the ball linear guide 20. Confirm that the edges of the first die side plate 31 and the second die side plate 32 are flush with the edge of the lower die 39, and position them to the middle part. Start the ball linear guide 20, and use the balls to push the lower die 39, the upper die 40, the first die side plate 31, and the second die side plate 32 into the center position of the workbench to complete die positioning. Subsequently, install the first lower die clamp 21, the second lower die clamp 22, the third lower die clamp 23, and the fourth lower die clamp 24 to suitable positions and make them in a clamped state to complete the fixation of the lower die. Then, drive the slider 25 of the press to move downward, driving the upper die changing device to move downward until the first nitrogen spring 15, the second nitrogen spring 16, the third nitrogen spring 17, and the fourth nitrogen spring 18 enter the bottom of the nitrogen spring holes of the first die side plate 31 and the second die side plate 32. At the same time, the first movable die press 7 and the second movable die press 8 contact the upper die 40, and insert the first I-shaped connecting device 33, the second I-shaped connecting device 34, the third I-shaped connecting device 35, and the fourth I-shaped connecting device 36 into the gaps between the first movable nitrogen spring press 13 and the second movable nitrogen spring press 14 and the first die side plate 31 and the second die side plate 32 respectively to complete the connection between the first die side plate 31, the second die side plate 32 and the first movable nitrogen spring press 13, the second movable nitrogen spring press 14, the first nitrogen spring 15, the second nitrogen spring 16, the third nitrogen spring 17, and the fourth nitrogen spring 18. During the subsequent upward movement of the slider 25 of the press, the first I-shaped connecting device 33, the second I-shaped connecting device 34, the third I-shaped connecting device 35, and the fourth I-shaped connecting device 36 will drive the first die side plate 31 and the second die side plate 32 to move upward to separate from the lower die 39. At the same time, clamp the hydraulic clamps 9 of the first movable die press, the hydraulic clamps 10 of the second movable die press, the hydraulic clamps 11 of the third movable die press, and the hydraulic clamps 12 of the fourth movable die press to clamp each movable die press and the upper die to complete the fixation of the upper die. During the production process when the slider 25 of the press moves upward, the hydraulic clamps 9 of the first movable die press, the hydraulic clamps 10 of the second movable die press, the hydraulic clamps 11 of the third movable die press, and the hydraulic clamps 12 of the fourth movable die press will drive the upper die 40 to move upward to separate from the lower die 39. Then, drive the slider 25 of the press to move downward, driving the upper die changing device to move downward until the bottom of the first die side plate 31 and the second die side plate 32 touches the upper surface of the lower die 39, and loosen the clamps 9 of the first movable die press, the clamps 10 of the second movable die press, the clamps 11 of the third movable die press, and the clamps 12 of the fourth movable die press.Operate the press to lower the press slide block 25 to drive the upper die changing device upward to a suitable position, release the first lower die fixture 21, the second lower die fixture 22, the third lower die fixture 23, and the fourth lower die fixture 24, and remove the first lower die fixture 21, the second lower die fixture 22, the third lower die fixture 23, and the fourth lower die fixture 24. Start the ball linear guide 20 and use the balls to push the die out of the workbench to complete the die disassembly.

[0057] Embodiment 2

[0058] The quick die changing device and method for gas-liquid hybrid pressing forming provided in this embodiment use 8 electromagnetic chucks to replace the first movable die pressing hydraulic fixture 9, the second movable die pressing hydraulic fixture 10, the third movable die pressing hydraulic fixture 11, the fourth movable die pressing hydraulic fixture 12, the first lower die hydraulic fixture 21, the second lower die hydraulic fixture 22, the third lower die hydraulic fixture 23, and the fourth lower die hydraulic fixture 24 in Embodiment 1. Other steps are the same as those in Embodiment 1.

[0059] Embodiment 3

[0060] The quick die changing method for gas-liquid hybrid pressing forming provided in this embodiment uses 4 electric lead screws to replace the first hand-operated lead screw 2, the second hand-operated lead screw 3, the third hand-operated lead screw 4, and the fourth hand-operated lead screw 5 in Embodiment 1. Other steps are the same as those in Embodiment 1.

[0061] Embodiment 4

[0062] On the basis of Embodiment 1, as Figure 8 shown, the first oil cylinder 29 further includes an extension cross bar 41 and a first rack 42. The extension cross bar 41 is fixedly installed at the rear end of the first oil cylinder 29, and the first rack 42 is fixedly installed at the bottom end of the extension cross bar 41.

[0063] As Figure 9, the press table 26 further includes a first gear 43, a second gear 44, a second rack 45, a contact rod 46, a support guide rail 47, a support back plate 48, a positioning bolt 49, a displacement cross frame 50, a rear end bracket 51, a side end base plate 52, a sliding key 53 and a rear end bottom plate 54. The first gear 43 and the second gear 44 are rotatably installed at both ends of the top of the press table 26, and the first gear 43 is located in front of the second gear 44. The sliding keys 53 are symmetrically slidably inserted into the inner part of the top end of the rear end bottom plate 54. The rear end bottom plate 54 is fixedly installed at the rear end of the press table 26. The support guide rail 47 is fixedly installed at the top end of the sliding key 53. The support guide rails 47 are symmetrically and fixedly installed at the front end of the support back plate 48. The displacement cross frame 50 is symmetrically slidably sleeved on the support guide rails 47. The contact rods 46 are symmetrically fixedly installed at the front end of the displacement cross frame 50. The positioning bolt 49 is threadedly inserted into the top end of the displacement cross frame 50. The rear end brackets 51 are symmetrically fixedly installed at the rear end of the support back plate 48. The side end base plate 52 is fixedly installed at the side end of the rear end bracket 51. The second rack 45 is fixedly installed at the bottom end of the side end base plate 52.

[0064] The transmission ratio of the first gear 43 to the second gear 44 is 1:10. The second rack 45 meshes with the second gear 44, and the first rack 42 meshes with the first gear 43. The thicknesses of the second rack 45 and the first rack 42 are 1 cm, and the thicknesses of both the first gear 43 and the second gear 44 are 3 cm. Symmetrically arranged grooves adapted to the sliding keys 53 are formed at the top end of the rear end bottom plate 54. The positioning bolt 49 is vertically aligned with the support guide rail 47.

[0065] When implementing this embodiment, when the piston rod inside the first oil cylinder 29 drives the first punch 37 to approach the second die side plate 32, the extension cross bar 41 can be driven to displace the first rack 42. Through the engagement of the first rack 42 and the first gear 43, when the first rack 42 displaces, the first gear 43 and the second gear 44 can be driven to rotate. When the second gear 44 rotates, the second rack 45 can be driven to displace towards the front end. At this time, since the second rack 45 is connected to the side-end base plate 52 and can drive the support back plate 48 to displace towards the front end when displacing. By previously placing the lower die 39 and the upper die 40 on the tops of the rear end base plate 54 and the press workbench surface 26, the support back plate 48 can drive the contact rod 46 to move to contact the rear ends of the lower die 39 and the upper die 40. Thus, when the second rack 45 continuously moves towards the front end, the contact rod 46 can be driven to push the lower die 39 and the upper die 40 to move towards the front end. Subsequently, when the first punch 37 moves to contact the second die side plate 32, the contact rod 46 can push the lower die 39 and the upper die 40 to move towards the front end to the center of the top of the press workbench surface 26, thereby ensuring that the lower die 39 and the upper die 40 are displaced to the center of the top of the press workbench surface 26 for installation work. When this device is in use, the displacement cross frame 50 is slidably sleeved on the top of the support guide rail 47, so that the displacement cross frame 50 can slide and adjust on the support guide rail 47, thereby enabling the support displacement cross frame 50 to drive the contact rod 46 to move to a specified position. Subsequently, when the displacement cross frame 50 moves to a suitable position, the positioning bolt 49 can be screwed to be fastened to the support guide rail 47, so that the displacement cross frame 50 can be restricted and fixed, thereby preventing the contact rod 46 from sliding again and completing the adjustment work of the contact rod 46. Moreover, by using different transmission ratios for the first gear 43 and the second gear 44, when the piston rod inside the first oil cylinder 29 displaces a short distance, the support back plate 48 can be driven to move a large distance towards the front end, increasing the distance that the support back plate 48 moves towards the front end, facilitating the pushing of the lower die 39 and the upper die 40 to the center of the top of the press workbench surface 26. At the same time, by staggering the second rack 45 and the first rack 42 vertically, the interference between the second rack 45 and the first rack 42 can be avoided. And when the support back plate 48 displaces, the sliding key 53 can be driven to slide in the slot inside the top of the rear end base plate 54, enabling the support back plate 48 to displace along a straight line to complete the work.

[0066] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rapid die-changing device for gas-liquid hybrid pressing forming, comprising a press slide block (25) and a press workbench surface (26). A top plate (1) is fixedly installed at the bottom end of the press slide block (25). A first lead screw (2), a second lead screw (3), a third lead screw (4), and a fourth lead screw (5) are arranged at the bottom end of the top plate (1), and it is characterized in that: A second movable nitrogen spring press tool (14) is provided at the bottom ends of the first lead screw (2) and the second lead screw (3), and a first movable nitrogen spring press tool (13) is provided at the bottom ends of the fourth lead screw (5) and the third lead screw (4). A first nitrogen spring (15) and a fourth nitrogen spring (18) are symmetrically provided at the bottom end of the first movable nitrogen spring press tool (13), and a second nitrogen spring (16) and a third nitrogen spring (17) are provided at the bottom end of the second movable nitrogen spring press tool (14). A fixed die press tool (6) is provided at the center of the bottom end of the upper plate (1). A first movable die press tool (7) is provided at the bottom ends of the third lead screw (4) and the fourth lead screw (5), and the first movable die press tool (7) is located at one end of the first movable nitrogen spring press tool (13) close to the fixed die press tool (6). A fourth movable die press tool clamp (12) and a first movable die press tool clamp (9) are provided at the bottom end of the first movable die press tool (7). A second movable die press tool (8) is provided at one end of the second lead screw (3) and the first lead screw (2) close to the fixed die press tool (6). A second movable die press tool clamp (10) and a third movable die press tool clamp (11) are provided at the bottom end of the second movable die press tool (8).

2. The gas-liquid hybrid compression molding rapid die change device according to claim 1, wherein: A first oil cylinder fixing device (27) and a second oil cylinder fixing device (28) are fixedly installed at both ends of the top of the press workbench surface (26). A first oil cylinder (29) is fixedly installed at the side end of the first oil cylinder fixing device (27). A first punch (37) is fixedly installed at the side end of the first oil cylinder (29) facing away from the first oil cylinder fixing device (27). A lower plate (19) is slidably installed at the center of the top end of the press workbench surface (26). A first lower die clamp (21), a second lower die clamp (22), a third lower die clamp (23) and a fourth lower die clamp (24) are installed inside the top end of the lower plate (19). A ball linear guide (20) is installed inside the lower plate (19). A second oil cylinder (30) is fixedly installed at the side end of the second oil cylinder fixing device (28). A second punch (38) is fixedly installed at the side end of the second oil cylinder (30) facing away from the second oil cylinder fixing device (28). A lower die (39) is installed at the top end of the lower plate (19). An upper die (40) is placed on the top end of the lower die (39). First die side plates (31) and second die side plates (32) are provided at both ends of the top of the lower plate (19). A second I-shaped connecting device (34) and a first I-shaped connecting device (33) are provided at the top end of the second die side plate (32). A third I-shaped connecting device (35) and a fourth I-shaped connecting device (36) are provided at the top end of the first die side plate (31).

3. The rapid die-changing device for gas-liquid hybrid pressing forming according to claim 2, wherein: The first lead screw (2), the second lead screw (3), the third lead screw (4) and the fourth lead screw (5) are hand-operated lead screws.

4. The rapid die-changing device for gas-liquid hybrid pressing forming according to claim 2, characterized in that: The first lead screw (2), the second lead screw (3), the third lead screw (4) and the fourth lead screw (5) are electric lead screws.

5. A gas-liquid hybrid compression molding rapid die change device according to claim 3 or 4, characterized in that: The first movable die pressing fixture (9), the second movable die pressing fixture (10), the third movable die pressing fixture (11), the fourth movable die pressing fixture (12), the first lower die fixture (21), the second lower die fixture (22), the third lower die fixture (23) and the fourth lower die fixture (24) are hydraulic fixtures.

6. The gas-liquid hybrid pressing and forming rapid die-changing device according to claim 3 or 4, characterized in that: The first movable die pressing fixture (9), the second movable die pressing fixture (10), the third movable die pressing fixture (11), the fourth movable die pressing fixture (12), the first lower die fixture (21), the second lower die fixture (22), the third lower die fixture (23) and the fourth lower die fixture (24) are electromagnetic chucks as hydraulic fixtures.

7. The gas-liquid mixed pressing and forming rapid die change device according to claim 6, characterized in that: The first oil cylinder (29) further includes an extension cross bar (41) and a first rack (42). The extension cross bar (41) is fixedly installed at the rear end of the first oil cylinder (29), and the first rack (42) is fixedly installed at the bottom end of the extension cross bar (41).

8. A gas-liquid mixed pressing and forming rapid die-changing device according to claim 7, characterized in that: The press worktable surface (26) further includes a first gear (43), a second gear (44), a second rack (45), a contact rod (46), a support guide rail (47), a support back plate (48), a positioning bolt (49), a displacement cross frame (50), a rear end bracket (51), a side end base plate (52), a sliding key (53) and a rear end bottom plate (54). The first gear (43) and the second gear (44) are rotatably installed at both ends of the top of the press worktable surface (26), and the first gear (43) is located in front of the second gear (44). The sliding key (53) is symmetrically slidably inserted into the top end inside of the rear end bottom plate (54). The rear end bottom plate (54) is fixedly installed at the rear end of the press worktable surface (26). The support guide rail (47) is fixedly installed at the top end of the sliding key (53). The support guide rail (47) is symmetrically fixedly installed at the front end of the support back plate (48). The displacement cross frame (50) is symmetrically slidably sleeved on the support guide rail (47). The contact rod (46) is symmetrically fixedly installed at the front end of the displacement cross frame (50). The positioning bolt (49) is threadedly inserted into the top end of the displacement cross frame (50). The rear end bracket (51) is symmetrically fixedly installed at the rear end of the support back plate (48). The side end base plate (52) is fixedly installed at the side end of the rear end bracket (51). The second rack (45) is fixedly installed at the bottom end of the side end base plate (52).

9. The gas-liquid hybrid pressing and forming rapid die change device according to claim 8, characterized in that: The transmission ratio of the first gear (43) to the second gear (44) is 1:

10. The second rack (45) meshes with the second gear (44). The first rack (42) meshes with the first gear (43). The thicknesses of the second rack (45) and the first rack (42) are 1 cm. The thicknesses of both the first gear (43) and the second gear (44) are 3 cm. The top end of the rear end bottom plate (54) is symmetrically provided with a card slot adapted to the sliding key (53). The positioning bolt (49) is vertically aligned with the support guide rail (47).

10. A method for a quick die change device in gas-liquid hybrid pressing forming, using the quick die change device in gas-liquid hybrid pressing forming described in claim 9, characterized in that, It includes the following steps: Step 1: Start the press, and make the slider (25) of the press move upward to drive the upper die-changing device upward to a suitable position; Step 2: Introduce the die into the lower die-changing device, move the ball linear guide (20) out of the lower plate (19), place the lower die (39), upper die (40), first die side plate (31), and second die side plate (32) on the ball linear guide (20), confirm that the edges of the first die side plate (31) and the second die side plate (32) are flush with the edge of the lower die (39), and position them to the middle part. Start the ball linear guide (20), and use the lower die (39), upper die (40), first die side plate (31), and second die side plate (32) to push them into the center position of the workbench to complete die positioning; Step 3: Fix the lower die, install the first lower die fixture (21), second lower die fixture (22), third lower die fixture (23), and fourth lower die fixture (24) to suitable positions and make them in a clamped state to complete the fixation of the lower die; Step 4: Fix the die side plates, and make the slider (25) of the press move downward to drive the upper die-changing device downward until the first nitrogen spring (15), second nitrogen spring (16), third nitrogen spring (17), and fourth nitrogen spring (18) enter the bottom of the first die side plate (31) and the second die side plate (32). At the same time, the first movable die holder (7) and the second movable die holder (8) contact the upper die (40), and insert the first I-shaped connecting device (33), second I-shaped connecting device (34), third I-shaped connecting device (35), and fourth I-shaped connecting device (36) into the gaps between the first movable nitrogen spring holder (13) and the second movable nitrogen spring holder (14) and the first die side plate (31) and the second die side plate (32) respectively to complete the connection between the first die side plate (31), second die side plate (32) and the first movable nitrogen spring holder (13), second movable nitrogen spring holder (14), first nitrogen spring (15), second nitrogen spring (16), third nitrogen spring (17), and fourth nitrogen spring (18). During the upward movement of the slider (25) of the press subsequently, the first I-shaped connecting device (33), second I-shaped connecting device (34), third I-shaped connecting device (35), and fourth I-shaped connecting device (36) will drive the first die side plate (31) and the second die side plate (32) to move upward to separate from the lower die (39); Step 5: Fix the upper die, clamp the first movable die holder fixture (9), second movable die holder fixture (10), third movable die holder fixture (11), and fourth movable die holder fixture (12) to make each movable die holder clamp the upper die to complete the fixation of the upper die. During the production process when the slider (25) of the press moves upward, the first movable die holder fixture (9), second movable die holder fixture (10), third movable die holder fixture (11), and fourth movable die holder fixture (12) will drive the upper die (40) to move upward to separate from the lower die (39); Step 6: Disassemble the upper die. Lower the slide block (25) of the press to drive the upper die changing device downward until the bottom of the first die side plate (31) and the second die side plate (32) touches the upper surface of the lower die (39). Loosen the first movable die clamping fixture (9), the second movable die clamping fixture (10), the third movable die clamping fixture (11) and the fourth movable die clamping fixture (12). Step 7: Disassemble the lower die. Operate the press to lower the slide block (25) of the press to drive the upper die changing device upward to a proper position. Loosen the first lower die clamping fixture (21), the second lower die clamping fixture (22), the third lower die clamping fixture (23) and the fourth lower die clamping fixture (24), and remove the first lower die clamping fixture (21), the second lower die clamping fixture (22), the third lower die clamping fixture (23) and the fourth lower die clamping fixture (24). Start the ball linear guide (20) and use the balls to push the die out of the workbench to complete the die disassembly. Step 8: Install a new die. Repeat Steps 1 to 5. Step 9: Disassemble the new die. Repeat Steps 6 to 7.

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