A double station rubber pad forming hydraulic press

Abstract

This invention provides a dual-station rubber pad forming hydraulic press, comprising a main unit, left and right feeding stations, a hydraulic system, a pressurizing system, and an oil cooler. The main unit adopts a multi-layered stacked frame structure and a trough-shaped housing frame, resulting in more uniform and stable force distribution compared to existing equipment. This simplifies the rubber pad replacement process and eliminates the tedious disassembly and assembly of the housing frame. The power system employs a two-stage pressure system consisting of a main hydraulic cylinder and a rapid hydraulic cylinder connected in parallel, capable of meeting the requirements of high-pressure forming and low-pressure rapid movement. The mobile conveying structure composed of the middle forming station and the left and right feeding stations enables continuous forming operations and significantly improves production efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of flexible forming equipment for metal sheets, and specifically relates to a dual-station hydraulic press for forming rubber pads. Background Technology

[0002] Currently, most hydraulic presses for forming rubber pads in sheet metal processing employ a frame structure with multiple columns, resulting in a large and heavy overall size that is inconvenient for installation and commissioning. In presses using rubber pads as flexible pressure units, the rubber pads need to be installed or removed from the frame along with the matching housing, leading to equipment downtime and cumbersome hoisting and positioning processes. Furthermore, changes in stress during these processes can cause a decrease in accuracy and a shortened lifespan. On the other hand, existing hydraulic rubber pad forming production lines have numerous shortcomings in loading / unloading, pressure supply, and cooling processes, negatively impacting product quality, manufacturing costs, and equipment lifespan. Summary of the Invention

[0003] This invention provides a dual-station rubber pad forming hydraulic press, which consists of a main unit, left and right feeding stations, a hydraulic system, a pressurizing system, and an oil cooler; The main unit, which performs the rubber pad hydroforming process, includes: a main frame, a housing, a rubber pad, a slider, a main cylinder, and a rapid cylinder. The main frame is composed of multiple vertically stacked plates with square openings, forming a space for mounting the housing and slider at the openings. The left and right sides of this space are connected to the left and right loading stations, respectively. The housing is fixedly installed on the upper surface of the space and has a downward-opening rubber pad mounting groove, in which the rubber pad is placed. The slider is located directly below the housing, with a mold lifting plate on its upper surface for mounting a rigid mold, and its lower surface connected to the main cylinder and the rapid cylinder, enabling it to move up and down within the space under the drive of these two cylinders. The main cylinder provides the forming pressure during forming, and the rapid cylinder enables the slider to move quickly within the space and reset. The hydraulic system is used to drive the rapid-action cylinder, the booster system is used to drive the main cylinder, and the oil cooler is used to cool the hydraulic oil in the hydraulic system and the booster system.

[0004] Furthermore, each of the left and right loading stations is equipped with a U-shaped moving worktable with a rectangular opening in the center. The mold lifting plate can be placed at the opening of the worktable and can be lifted from below the worktable by the slider after moving to the forming station in the main machine. The loading station and the forming station are respectively equipped with chain-type conveyor mechanisms for conveying the worktable, both of which are driven by motors and equipped with speed sensors. Telescopic blocking structures are set at the junctions between each station to position and restrict the movement of the worktable. Each of the left and right loading stations is equipped with a pair of safety light curtains to detect whether personnel have entered when the worktable is moving, and to stop the motor when personnel are detected.

[0005] Furthermore, the hydraulic system consists of a hydraulic pump, an oil tank, hydraulic lines, a solenoid valve assembly, and a pressure sensor. The hydraulic pump is used to pressurize the hydraulic oil stored in the oil tank into the hydraulic lines. The solenoid valve assembly controls the on / off state of the hydraulic oil to deliver it to the rapid cylinder and the booster system. The pressure sensor collects the pressure of the hydraulic system in real time and transmits it to the corresponding control system for adjustment.

[0006] Furthermore, the pressurization system consists of a pressurization pump, a high-pressure pipeline, a check valve, and a pressure regulating valve. The pressurization pump is used to pressurize the hydraulic oil provided by the hydraulic system during the forming stage, then force it into the high-pressure pipeline and deliver it to the main cylinder. The check valve is used to prevent hydraulic oil backflow, and the pressure regulating valve is used to adjust the forming pressure according to the forming requirements of metal sheets of different materials and thicknesses.

[0007] Furthermore, the oil cooler consists of a cooler, a circulating water pump, a cooling fan, and a temperature sensor; the cooler is connected in series in the pipelines of the hydraulic system and the booster system, the circulating water pump drives the cooling water to circulate in the cooler to remove the heat from the hydraulic oil, and the cooling fan simultaneously forces the cooler to dissipate heat.

[0008] Furthermore, an auxiliary hydraulic cylinder is also provided at the upper end of the main frame, which is used to extend into the mounting slot of the housing to push out the rubber pad when it is necessary to replace the rubber pad; the auxiliary hydraulic cylinder is also driven by a hydraulic system.

[0009] Furthermore, the rubber pad specifically adopts a multi-layer polyurethane rubber pad.

[0010] Furthermore, the hydraulic press also includes a control system, consisting of a PLC controller, a touch screen, a signal acquisition module, and an execution drive module. The signal acquisition module receives signals from various detection elements such as speed sensors, pressure sensors, and temperature sensors and transmits them to the PLC controller. The PLC controller, based on preset programs and parameters, sends corresponding control commands to various components such as the fast cylinder, main cylinder, auxiliary cylinder, hydraulic system, booster system, oil cooler, and chain conveyor mechanism through the execution drive module, enabling coordinated operation of each component. The touch screen serves as a human-machine interface, allowing operators to set forming parameters (such as pressure, slide stroke, and worktable movement speed), monitor equipment operating status, perform fault alarms and reset operations, thus achieving intelligent control of the equipment.

[0011] Furthermore, the hydraulic pump in the hydraulic system can be either a piston pump or a gear pump; the booster system can also use compressed air instead of hydraulic oil as a power source, and use an air-liquid booster pump instead of a hydraulic booster pump.

[0012] Furthermore, the telescopic blocking structure specifically uses a cylinder to provide the driving force.

[0013] The dual-station rubber pad forming hydraulic press provided by this invention features a multi-layer stacked main frame structure and a trough-shaped container frame. Compared to existing equipment, this design provides more uniform and stable force distribution, simplifies rubber pad replacement, and eliminates the tedious disassembly and assembly of the container frame. The power system employs a two-stage pressure system consisting of a main cylinder and a rapid-action cylinder connected in parallel, meeting the requirements for both high-pressure forming and low-pressure rapid movement. The mobile conveying structure, composed of the middle forming station and the left and right loading stations, enables continuous forming operations and significantly improves production efficiency. Attached Figure Description

[0014] Figure 1 This is an overall structural diagram of the dual-station rubber pad forming hydraulic press provided by the present invention; Figure 2 Host structure diagram; Figure 3 This is a diagram of the chain conveyor mechanism between the forming station and the left and right loading stations. Detailed Implementation

[0015] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] This invention provides a dual-station rubber pad forming hydraulic press, such as... Figure 1 As shown, it consists of a main unit, left and right loading stations, a hydraulic system, a booster system, and an oil cooler; The main unit is the primary equipment for performing the hydroforming process of rubber pads, such as... Figure 2 As shown, it includes: a main frame, a housing, a rubber pad, a slider, a main hydraulic cylinder, and a rapid hydraulic cylinder; the main frame is composed of multiple vertically stacked plates with square openings, forming a space for mounting the housing and slider at the openings, and the left and right sides of the space are respectively connected to the left and right loading stations; the housing is fixedly installed on the upper surface of the space, and has a downward-opening rubber pad mounting groove, in which the rubber pad is placed; the slider is located directly below the housing, and its upper surface is provided with a mold lifting plate for mounting a rigid mold, and its lower surface is connected to the main hydraulic cylinder and the rapid hydraulic cylinder respectively, enabling it to move up and down within the space under the drive of these two hydraulic cylinders; the main hydraulic cylinder is used to provide the forming pressure during forming, and the rapid hydraulic cylinder is used to realize the rapid movement and resetting of the slider within the space; The hydraulic system is used to drive the rapid-action cylinder, the booster system is used to drive the main cylinder, and the oil cooler is used to cool the hydraulic oil in the hydraulic system and the booster system.

[0017] In some preferred embodiments, such as Figure 3As shown, each of the left and right loading stations is equipped with a U-shaped moving worktable with a rectangular opening in the center. The mold lifting plate can be placed at the opening of the worktable and can be lifted from below the worktable by the slider after moving to the forming station in the main machine. The loading station and the forming station are respectively equipped with chain-type conveyor mechanisms for conveying the worktable, both of which are driven by motors and equipped with speed sensors. Telescopic blocking structures are set at the junctions between each station to position and restrict the movement of the worktable, and the positioning error is controlled within ±0.5mm. Each of the left and right loading stations is equipped with a pair of safety light curtains to detect whether personnel have entered when the worktable is moving, and to stop the motor when personnel are detected.

[0018] In some preferred embodiments, the hydraulic system consists of a hydraulic pump, an oil tank, hydraulic lines, a solenoid valve assembly, and a pressure sensor. The hydraulic pump is used to pump the hydraulic oil stored in the oil tank into the hydraulic lines. The solenoid valve assembly controls the on / off state of the hydraulic oil to deliver it to the rapid cylinder and the booster system. The pressure sensor collects the pressure of the hydraulic system in real time and transmits it to the corresponding control system for adjustment.

[0019] In some preferred embodiments, the pressurization system consists of a pressurization pump, a high-pressure pipeline, a check valve, and a pressure regulating valve. The pressurization pump is used to pressurize the hydraulic oil provided by the hydraulic system during the forming stage, then pressurize it into the high-pressure pipeline and deliver it to the main cylinder. The check valve is used to prevent the hydraulic oil from flowing back. The pressure regulating valve is used to adjust the forming pressure according to the forming requirements of metal sheets of different materials and thicknesses.

[0020] In some preferred embodiments, the oil cooler consists of a cooler, a circulating water pump, a cooling fan, and a temperature sensor; the cooler is connected in series in the pipeline between the hydraulic system and the booster system, the circulating water pump drives the cooling water to circulate in the cooler to remove the heat from the hydraulic oil, and the cooling fan simultaneously forces the cooler to dissipate heat.

[0021] In some preferred embodiments, an auxiliary hydraulic cylinder is also provided at the upper end of the main frame, which is used to extend into the mounting slot of the housing to push out the rubber pad when it is necessary to replace the rubber pad; the auxiliary hydraulic cylinder is also driven by a hydraulic system.

[0022] In some preferred embodiments, the rubber pad is specifically a multilayer polyurethane rubber pad.

[0023] In some preferred embodiments, the hydraulic press also includes a control system, which consists of a PLC controller, a touch screen, a signal acquisition module, and an execution drive module. The signal acquisition module receives signals from various detection elements such as speed sensors, pressure sensors, and temperature sensors and transmits them to the PLC controller. The PLC controller sends corresponding control commands to various components such as the fast cylinder, main cylinder, auxiliary cylinder, hydraulic system, booster system, oil cooler, and chain conveyor mechanism through the execution drive module according to preset programs and parameters, so as to realize the coordinated work of various components. The touch screen serves as a human-machine interface, allowing operators to set forming parameters (such as pressure, slider stroke, worktable movement speed, etc.), monitor equipment operating status, perform fault alarms and reset operations, thereby realizing intelligent control of the equipment.

[0024] In some preferred embodiments, the hydraulic pump in the hydraulic system is specifically selected as a piston pump or a gear pump; the booster system may also use compressed air instead of hydraulic oil as a power source, and use an air-liquid booster pump instead of a hydraulic booster pump.

[0025] In some preferred embodiments, the telescopic blocking structure is specifically driven by a cylinder.

[0026] In a specific embodiment of the present invention, the main frame is constructed using 10 layers of 70mm thick stacked plates, with buffer pads placed between adjacent stacked plates; the rubber pads are 5 layers of 80mm thick polyurethane rubber pads with a Shore hardness of 75A; the main hydraulic cylinder has a maximum output thrust of 8100 tons, meeting the forming requirements of 8000-ton class; the rapid hydraulic cylinder has an output thrust of 50 tons; the PLC controller is a Siemens S7-1500 series. This hydraulic press can perform the following steps to form metal sheets: 1) The operator sets the forming parameters (such as main cylinder pressure, slider lifting speed, worktable moving speed, etc.) through the touch screen of the control system and starts the various systems of the hydraulic press; 2) The oil cooler starts to pre-cool the hydraulic oil, the hydraulic system starts and outputs a rated pressure of 25MPA, which drives the rapid oil cylinder to lift the slider to the preset position or reach the preset pressure index. 3) The chain conveyor moves the metal sheet and rigid mold placed at the left loading station with the worktable. The moving speed is controlled based on the speed sensor data, and the speed is reduced when it approaches the forming station. After it reaches the position, the blocking mechanism positions the worktable. 4) The rapid hydraulic cylinder drives the lifting slider to move upward until the polyurethane rubber pad contacts the metal sheet, at which point the rapid hydraulic cylinder stops working; 5) The pressurization system is started, pressurizing the hydraulic oil to the preset pressure (maximum 90Mpa). The main oil cylinder drives the lifting slider to squeeze upward, so that the polyurethane rubber pad is squeezed and produces quasi-fluid characteristics, forming uniform flexible pressure on the metal sheet until the forming is completed. 6) After forming is completed, the main hydraulic cylinder of the pressurization system is depressurized and reset, and the rapid hydraulic cylinder drives the slider to descend to the initial height; 7) The chain conveyor moves the completed worktable to the right loading station for unloading, and the left loading station loads the material again and repeats each forming step to achieve continuous and uninterrupted production.

[0027] During equipment operation, the oil cooler adjusts the cooling power in real time according to the hydraulic oil temperature, and the control system monitors the operating status of each system in real time. When a fault occurs, it will promptly alarm and stop the operation of the relevant components.

[0028] When the bottom polyurethane rubber pad is worn, the forming operation of the main unit can be paused, the auxiliary hydraulic cylinder can be started to push the worn rubber pad out of the housing, and the equipment can be resumed after the new rubber pad is replaced.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] It should be understood that the sequence number of each step in the embodiments of the present invention does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-station rubber pad forming hydraulic press, characterized in that: It consists of a main unit, left and right feeding stations, a hydraulic system, a booster system, and an oil cooler; The main unit, which performs the rubber pad hydroforming process, includes: a main frame, a housing, a rubber pad, a slider, a main cylinder, and a rapid cylinder. The main frame is composed of multiple vertically stacked plates with square openings, forming a space for mounting the housing and slider at the openings. The left and right sides of this space are connected to the left and right loading stations, respectively. The housing is fixedly installed on the upper surface of the space and has a downward-opening rubber pad mounting groove, in which the rubber pad is placed. The slider is located directly below the housing, with a mold lifting plate on its upper surface for mounting a rigid mold, and its lower surface connected to the main cylinder and the rapid cylinder, enabling it to move up and down within the space under the drive of these two cylinders. The main cylinder provides the forming pressure during forming, and the rapid cylinder enables the slider to move quickly within the space and reset. The hydraulic system is used to drive the rapid-action cylinder, the booster system is used to drive the main cylinder, and the oil cooler is used to cool the hydraulic oil in the hydraulic system and the booster system.

2. The dual-station rubber pad forming hydraulic press as described in claim 1, characterized in that: Each of the left and right loading stations is equipped with a U-shaped moving worktable with a rectangular opening in the center. The mold lifting plate is placed at the opening of the worktable and can be lifted from below the worktable by the slider after moving to the forming station in the main machine. The loading station and the forming station are respectively equipped with chain-type conveyor mechanisms for conveying the worktable, both of which are driven by motors and equipped with speed sensors. Telescopic blocking structures are set at the junctions between each station to position and restrict the movement of the worktable. Each of the left and right loading stations is equipped with a pair of safety light curtains.

3. The dual-station rubber pad forming hydraulic press as described in claim 1, characterized in that: The hydraulic system consists of a hydraulic pump, an oil tank, hydraulic lines, a solenoid valve assembly, and a pressure sensor. The hydraulic pump is used to pump the hydraulic oil stored in the oil tank into the hydraulic lines. The solenoid valve assembly controls the on / off state of the hydraulic oil to deliver it to the rapid cylinder and the booster system. The pressure sensor collects the pressure of the hydraulic system in real time and transmits it to the corresponding control system for adjustment.

4. The dual-station rubber pad forming hydraulic press as described in claim 1, characterized in that: The booster system consists of a booster pump, a high-pressure pipeline, a check valve, and a pressure regulating valve. The booster pump is used to pressurize the hydraulic oil supplied by the hydraulic system during the forming stage, then force it into the high-pressure pipeline and deliver it to the main cylinder. The check valve is used to prevent hydraulic oil backflow, and the pressure regulating valve is used to adjust the forming pressure according to the forming requirements of metal sheets of different materials and / or thicknesses.

5. The dual-station rubber pad forming hydraulic press as described in claim 1, characterized in that: The oil cooler consists of a cooler, a circulating water pump, a cooling fan, and a temperature sensor. The cooler is connected in series in the pipeline between the hydraulic system and the booster system. The circulating water pump drives the cooling water to circulate in the cooler to remove the heat from the hydraulic oil, while the cooling fan simultaneously forces the cooler to dissipate heat.

6. The dual-station rubber pad forming hydraulic press as described in claim 1, characterized in that: An auxiliary hydraulic cylinder is also provided at the upper end of the main frame, which is used to push the rubber pad out of the mounting slot of the housing when the rubber pad needs to be replaced; the auxiliary hydraulic cylinder is also driven by a hydraulic system.

7. The dual-station rubber pad forming hydraulic press as described in claim 1, characterized in that: The rubber pad is specifically made of multi-layer polyurethane rubber.

8. The dual-station rubber pad forming hydraulic press as described in claim 1, characterized in that: It also includes a control system, which consists of a PLC controller, a touch screen, a signal acquisition module, and an execution drive module.

9. The dual-station rubber pad forming hydraulic press as described in claim 1, characterized in that: The hydraulic pump in the hydraulic system can be either a piston pump or a gear pump; the booster system can use compressed air instead of hydraulic oil as a power source and use an air-liquid booster pump instead of a hydraulic booster pump.

10. The dual-station rubber pad forming hydraulic press as described in claim 2, characterized in that: The telescopic blocking structure uses a cylinder to provide the driving force.

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