Multi-specification continuous press resistant to deformation of the press plate

Abstract

The application relates to a multi-specification continuous press capable of resisting deformation of a pressing plate and belongs to the technical field of press equipment. The press comprises a rack, an upper pressing plate and a lower pressing plate arranged on the rack, and a hydraulic system for driving the upper pressing plate to ascend and descend. A processing gap for pressing a plate is formed between the upper pressing plate and the lower pressing plate. The hydraulic system comprises a first oil cylinder group, a second oil cylinder group and a control unit. The first oil cylinder group and the second oil cylinder group are arranged on the rack along the length direction of the rack. The first oil cylinder group is independently connected with a first pressure adjusting part. The second oil cylinder group is independently connected with a second pressure adjusting part. The first pressure adjusting part and the second pressure adjusting part are respectively connected with the control unit in a signal mode. The application can be compatible with high-quality production of at least two length specifications of plates and is favorable for inhibiting the bending moment deformation of the upper pressing plate due to local suspension, thereby prolonging the service life of the equipment.

Description

Technical Field

[0001] This application relates to the field of press equipment, and in particular to a multi-specification continuous press that resists deformation of the pressure plate. Background Technology

[0002] In the field of continuous press production, the contradiction between the diverse specifications of engineered wood panels and the insufficient adaptability of equipment has long existed. Currently, most domestic presses can only be adapted to single-length panels (such as dedicated 2.44m or 2.8m presses), forcing customers to repeatedly purchase equipment to meet different order requirements. This limitation not only increases production costs but also causes serious mechanical deformation problems during the pressing of short panels. When a long press forcibly presses a short panel, the two ends of the panel are suspended and lack support, causing the upper pressing plate to bear abnormal bending moment loads. This leads to two technical defects: firstly, the panel thickness exhibits a gradient distribution, thicker in the middle and thinner at the edges, disrupting product uniformity; secondly, the ends of the upper pressing plate corresponding to the suspended area are prone to plastic deformation due to abnormal loads, significantly shortening the equipment lifespan.

[0003] Existing technical solutions, such as Chinese Patent No. CN202656268U, disclose a cylinder control system for a continuous press. Although it achieves optimized distribution of cylinder pressure, it adopts a structure in which each cylinder is independently equipped with a solenoid valve. This requires a large number of independently controlled solenoid valves and oil circuit systems, resulting in excessive complexity of the hydraulic system. This not only significantly increases manufacturing costs but also reduces system reliability due to redundancy in control signals. Utility Model Content

[0004] In order to overcome the equipment compatibility limitations of single-specification plates and improve the bending deformation problem caused by the suspended pressing of the upper platen edge, this application provides a multi-specification continuous press for resisting plate deformation.

[0005] This application provides a multi-specification continuous press for resisting pressure plate deformation, which adopts the following technical solution:

[0006] A multi-specification continuous press for resisting plate deformation includes a frame, an upper pressure plate and a lower pressure plate mounted on the frame, and a hydraulic system for driving the upper pressure plate to rise and fall. A processing gap for pressing the plate is formed between the upper pressure plate and the lower pressure plate. The hydraulic system includes a first cylinder group, a second cylinder group, and a control unit. The first cylinder group and the second cylinder group are both mounted on the frame and arranged along the length of the frame. The first cylinder group is independently connected to a first pressure regulating component, and the second cylinder group is independently connected to a second pressure regulating component. The first pressure regulating component and the second pressure regulating component are respectively signal connected to the control unit.

[0007] Optionally, the first hydraulic cylinder group is located in the middle of the upper pressure plate, and the second hydraulic cylinder group is located on both sides of the first hydraulic cylinder group.

[0008] Optionally, the first cylinder group includes several central cylinders, which are distributed in a matrix in the middle region of the upper pressure plate along its length; the second cylinder group includes an even number of edge cylinders, which are symmetrically distributed at both ends of the upper pressure plate along its length.

[0009] Optionally, the hydraulic system further includes a hydraulic station, wherein all the central cylinders of the first cylinder group are connected in parallel and then connected in series with the first pressure regulating component to the hydraulic station; and all the peripheral cylinders of the second cylinder group are connected in parallel and then connected in series with the second pressure regulating component to the hydraulic station.

[0010] Optionally, the first pressure regulating component is a first proportional valve, and the second pressure regulating component is a second proportional valve.

[0011] In summary, this application includes at least one of the following beneficial technical effects:

[0012] 1. By incorporating a first hydraulic cylinder group, a second hydraulic cylinder group, a first pressure regulating component, a second regulating component, and a control unit, the bending deformation problem of the upper pressure plate during the pressing of multi-specification sheet materials is improved. When pressing short sheet materials, the control unit can precisely reduce the pressure output of the corresponding hydraulic cylinder group in the suspended area, thereby achieving two breakthroughs: firstly, significantly suppressing the bending moment deformation of the upper pressure plate caused by local suspension, avoiding uneven thickness defects in the sheet material; secondly, breaking the industry limitation of traditional presses that are only suitable for a single specification, enabling the same equipment to be compatible with the high-quality production of at least two length specifications of sheet materials. This structure significantly extends the service life of the equipment while reducing the capital investment required for customers to purchase multiple specialized machines.

[0013] 2. By symmetrically distributing the second hydraulic cylinder group on both sides of the first hydraulic cylinder group, the centered pressing process of the sheet metal is forcibly constrained, ensuring that the single-sided overhang length remains constant at half of the total overhang length (total overhang length of the upper pressure plate = total length of the upper pressure plate - sheet metal length). Compared to the offset pressing scheme (where one side bears the entire overhang length), this design minimizes the single-sided bending moment load (bending stress formula σ∝L). 2 (where L is the length of the single-sided suspension). The second hydraulic cylinder group, through synchronous decompression compensation, helps to form a reverse support couple in the suspension area, reducing the risk of bending deformation of the upper pressure plate. This mechanical model helps to keep the upper pressure plate in a horizontal state under short plate pressing conditions, thereby improving the uneven thickness defect of the plate material that is "thick in the middle and thin at both sides" and improving the processing quality of multi-specification plate materials. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a multi-specification continuous press for resisting pressure plate deformation according to an embodiment of this application.

[0015] Figure 2This is a schematic diagram illustrating the layout structure of the first and second hydraulic cylinder groups in the embodiments of this application.

[0016] Figure 3 This is a schematic diagram illustrating the control unit in the embodiments of this application.

[0017] Figure 4 This is a schematic diagram illustrating the hydraulic system in the embodiments of this application.

[0018] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Upper pressure plate; 3. Lower pressure plate; 4. Hydraulic system; 41. First cylinder group; 411. Central cylinder; 42. Second cylinder group; 421. Edge cylinder; 43. Control unit; 44. First pressure regulating component; 45. Second pressure regulating component; 46. Hydraulic station; 5. Processing clearance. Detailed Implementation

[0019] The following combination Figures 1-4 This application will be described in further detail below.

[0020] Example:

[0021] This application discloses a multi-specification continuous press for resisting pressure plate deformation. (Refer to...) Figure 1 A multi-specification continuous press for resisting plate deformation includes a frame 1, an upper pressure plate 2, a lower pressure plate 3, and a hydraulic system 4. The lower pressure plate 3 is fixedly connected to the frame 1, the upper pressure plate 2 is slidably mounted on the frame 1 in the vertical direction, and the hydraulic system 4 is connected to the upper pressure plate 2 to drive the upper pressure plate 2 to rise and fall. A processing gap 5 for pressing the plate is formed between the upper pressure plate 2 and the lower pressure plate 3.

[0022] Reference Figures 2-4 The hydraulic system 4 includes a first cylinder group 41, a second cylinder group 42, and a control unit 43. Both the first cylinder group 41 and the second cylinder group 42 are mounted on the frame 1 and arranged along its length. The first cylinder group 41 is independently connected to a first pressure regulating component 44, and the second cylinder group 42 is independently connected to a second pressure regulating component 45. The first pressure regulating component 44 and the second pressure regulating component 45 are respectively signal-connected to the control unit 43. Thus, the control unit 43 can adjust the pressure output of the first cylinder group 41 and the second cylinder group 42 by controlling the first pressure regulating component 44 and the second pressure regulating component respectively. In this embodiment, the control unit 43 is a PLC controller.

[0023] Reference Figure 2 and Figure 4The first pressure regulating component 44 is a first proportional valve, and the second pressure regulating component 45 is a second proportional valve. The first and second proportional valves independently regulate the oil pressure, so that the output pressures of the first cylinder group 41 and the second cylinder group 42 are set differently. The first cylinder group 41 is located in the middle of the upper pressure plate 2, and the second cylinder group 42 is located on both sides of the first cylinder group 41. The first and second proportional valves steplessly regulate the output pressure through current signals, so that the first cylinder group 41 located in the middle area of ​​the upper pressure plate 2 and the second cylinder group 42 located at both ends of the upper pressure plate 2 can independently regulate their pressure. The continuous press of this embodiment can press plates of multiple lengths. When pressing the short plate, the short plate is placed in the processing gap 5 directly opposite the first hydraulic cylinder group 41. At this time, the control unit 43 sends an adjustment start signal to the second pressure regulating component 45. The second pressure regulating component 45 reduces the pressure output of the second hydraulic cylinder group 42, thereby realizing the active pressure reduction of the second hydraulic cylinder group 42 in the suspended area of ​​the upper pressure plate 2, reducing the torsional effect of the suspended end bending moment load on the upper pressure plate 2.

[0024] Reference Figure 2 and Figure 4 To ensure the uniformity and stability of pressure transmission in the central area of ​​the upper pressure plate 2, the first cylinder group 41 includes several central cylinders 411, which are distributed in a matrix in the central area along the length of the upper pressure plate 2. The second cylinder group 42 includes an even number of edge cylinders 421, which are symmetrically distributed at both ends along the length of the upper pressure plate 2. This helps to maintain the lateral force balance of the upper pressure plate 2 when reducing the pressure in the suspended area, thereby improving the thickness uniformity and reducing the fatigue crack rate of the pressure plate. In this embodiment, there are 4 central cylinders 411, which are distributed in a "2×2" matrix; there are 4 edge cylinders 421, with 2 on each side. When pressing short plates, the central cylinders 411 maintain high pressure to ensure the basic compaction strength, while the edge cylinders 421 reduce the pressure proportionally according to the suspended length of the plate, forming a gradient pressure field of "strong pressure in the center + weak pressure at the edges". This pressure distribution can actively counteract the bending deformation trend of the upper pressure plate 2.

[0025] It is worth noting that by setting the second hydraulic cylinder group 42 symmetrically distributed on both sides of the first hydraulic cylinder group 41, the centered pressing process of the sheet metal is forcibly constrained, making it easier to keep the single-sided overhang length constant at half of the total overhang length (total overhang length of upper pressure plate 2 = total length of upper pressure plate 2 - sheet metal length). Compared with the offset pressing scheme (one side bears the entire overhang length), this design minimizes the single-sided bending moment load (bending stress formula σ∝L). 2(where L is the length of the single-sided suspension). The second hydraulic cylinder group 42, through synchronous decompression compensation, helps to form a reverse support couple in the suspension area, reducing the risk of bending deformation of the upper pressure plate 2. This mechanical model helps to keep the upper pressure plate 2 in a horizontal state under short plate pressing conditions, thereby improving the uneven thickness defect of the plate material that is "thick in the middle and thin on both sides" and improving the processing quality of multi-specification plate materials.

[0026] Reference Figure 4 To achieve a compact design of the hydraulic system 4, the hydraulic system 4 also includes a hydraulic station 46. All the central cylinders 411 of the first cylinder group 41 are connected in parallel and then connected in series with the first pressure regulating component 44 to the hydraulic station 46. All the peripheral cylinders 421 of the second cylinder group 42 are connected in parallel and then connected in series with the second pressure regulating component 45 to the hydraulic station 46. The parallel connection of all central cylinders 411 achieves natural pressure equalization within the group, eliminating pressure fluctuations caused by independent multi-point control; the parallel connection of all peripheral cylinders 421 ensures synchronous pressure compensation in the suspended area. Each of the two groups of cylinders is connected to its respective proportional valve through a single oil circuit. Compared to the existing technology—where each cylinder is independently equipped with a solenoid valve—this reduces the number of valve bodies required and the number of pipeline nodes. Therefore, the partitioned control structure of this embodiment, compared to the existing cylinder-based control structure, helps reduce the leakage risk and maintenance cost of the hydraulic system 4, while also improving the pressure response speed, allowing pressure adjustment during plate switching to be completed within a single pressing cycle.

[0027] The implementation principle of a multi-specification continuous press for resisting plate deformation in this application embodiment is as follows: By setting up a first hydraulic cylinder group 41, a second hydraulic cylinder group 42, a first pressure adjusting component 44, a second adjusting component, and a control unit 43, the bending deformation problem of the upper pressure plate 2 during multi-specification plate pressing is improved. When pressing short plates, the control unit 43 can precisely reduce the pressure output of the corresponding hydraulic cylinder group in the suspended area, thereby achieving two breakthroughs: firstly, significantly suppressing the bending moment deformation of the upper pressure plate 2 caused by local suspension, avoiding uneven thickness defects in the plate; secondly, breaking the industry limitation of traditional presses only adapting to a single specification, enabling the same equipment to be compatible with high-quality production of at least two length specifications of plates. This structure significantly extends the service life of the equipment while reducing the capital investment required for customers to purchase multiple dedicated machines.

[0028] By symmetrically distributing the second hydraulic cylinder group 42 on both sides of the first hydraulic cylinder group 41, the centered pressing process of the sheet metal is forcibly constrained, ensuring that the single-sided overhang length remains constant at half of the total overhang length (total overhang length of upper pressure plate 2 = total length of upper pressure plate 2 - sheet metal length). Compared to the offset pressing scheme (where one side bears the entire overhang length), this design minimizes the single-sided bending moment load (bending stress formula σ∝L). 2(where L is the length of the single-sided suspension). The second hydraulic cylinder group 42, through synchronous decompression compensation, helps to form a reverse support couple in the suspension area, reducing the risk of bending deformation of the upper pressure plate 2. This mechanical model helps to keep the upper pressure plate 2 in a horizontal state under short plate pressing conditions, thereby improving the uneven thickness defect of the plate material that is "thick in the middle and thin on both sides" and improving the processing quality of multi-specification plate materials.

[0029] Furthermore, compared to the existing technology of cylinder control to optimize the pressure distribution of the upper pressure plate 2, this embodiment adopts multi-cylinder zone control, with each of the two sets of cylinders connected to its respective proportional valve through a single oil circuit. This helps to reduce the number of valve bodies required and reduce pipeline nodes. In turn, it helps to reduce the risk of leakage and maintenance costs of the hydraulic system 4, while improving the pressure response speed and ensuring that the pressure adjustment during plate switching can be completed within a single pressing cycle.

[0030] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multi-specification continuous press for resisting plate deformation, comprising a frame (1), an upper pressure plate (2) and a lower pressure plate (3) disposed on the frame (1), and a hydraulic system (4) for driving the upper pressure plate (2) to rise and fall, wherein a processing gap (5) for pressing the plate is formed between the upper pressure plate (2) and the lower pressure plate (3), characterized in that: The hydraulic system (4) includes a first cylinder group (41), a second cylinder group (42), and a control unit (43). The first cylinder group (41) and the second cylinder group (42) are both mounted on the frame (1) and arranged along the length of the frame (1). The first cylinder group (41) is independently connected to a first pressure regulating component (44), and the second cylinder group (42) is independently connected to a second pressure regulating component (45). The first pressure regulating component (44) and the second pressure regulating component (45) are respectively connected to the control unit (43) via signal.

2. The multi-specification continuous press for resisting pressure plate deformation according to claim 1, characterized in that: The first hydraulic cylinder group (41) is located in the middle of the upper pressure plate (2), and the second hydraulic cylinder group (42) is located on both sides of the first hydraulic cylinder group (41).

3. A multi-specification continuous press for resisting pressure plate deformation according to claim 2, characterized in that: The first cylinder group (41) includes several central cylinders (411) and is distributed in a matrix in the middle region of the upper pressure plate (2) along its length; the second cylinder group (42) includes an even number of edge cylinders (421) and is symmetrically distributed at both ends of the upper pressure plate (2) along its length.

4. A multi-specification continuous press for resisting pressure plate deformation according to claim 1, characterized in that: The hydraulic system (4) also includes a hydraulic station (46). All the central cylinders (411) of the first cylinder group (41) are connected in parallel and then connected in series with the first pressure regulating component (44) to the hydraulic station (46). All the edge cylinders (421) of the second cylinder group (42) are connected in parallel and then connected in series with the second pressure regulating component (45) to the hydraulic station (46).

5. A multi-specification continuous press for resisting pressure plate deformation according to claim 1, characterized in that: The first pressure regulating component (44) is a first proportional valve, and the second pressure regulating component (45) is a second proportional valve.

Images