High-precision guide structure of electro-hydraulic bending machine

Abstract

The utility model discloses a high-precision guide structure of an electro-hydraulic bending machine, and belongs to the technical field of bending machines. A high-precision guide structure of an electro-hydraulic bending machine comprises a guide column and a sliding plate, the guide column is connected with the sliding plate in a sleeved mode, a supporting plate is arranged on one side of the sliding plate, sleeving holes are formed in the two ends of the supporting plate, composite guide sleeves are installed on the sleeving holes, the composite guide sleeves are arranged along the inner walls of the sleeving holes, and the composite guide sleeves work in the mode of being attached to the outer wall of the guide column. The four-direction independent compensation structure ensures high guide precision, real-time dynamic compensation eliminates accumulative errors, an automatic compensation mechanism can offset certain abrasion loss, the self-lubricating design prolongs the maintenance period, the overall service life is prolonged, four sets of independent hydraulic systems can perform differential compensation, inclination caused by unbalance loading can be automatically corrected, and the service life is prolonged. Automatic abrasion compensation is achieved, and manual intervention is not needed.

Description

Technical Field

[0001] This utility model relates to the field of bending machine technology, and more specifically, to a high-precision guide structure for an electro-hydraulic bending machine. Background Technology

[0002] Traditional electro-hydraulic bending machines mostly use linear guide rails or ordinary guide plates for slider guidance. These problems include: increased guide rail clearance after long-term use, leading to slider tilting; poor resistance to eccentric loads, affecting the consistency of bending angles; and frequent lubrication and maintenance, resulting in high costs. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a high-precision guide structure for an electro-hydraulic bending machine to solve the above-mentioned deficiencies.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] This utility model discloses a high-precision guide structure for an electro-hydraulic bending machine, comprising a guide column and a slide plate. The guide column is sleeved with the slide plate, and a support plate is provided on one side of the slide plate. The support plate has sleeve holes at both ends, and a composite guide sleeve is installed on the sleeve holes. The composite guide sleeve is arranged along the inner wall of the sleeve hole and works in contact with the outer wall of the guide column.

[0006] Preferably, the composite guide sleeve includes a self-lubricating bronze bushing, a polyurethane elastic layer, and a hydraulic compensation structure. The inner wall of the self-lubricating bronze bushing is fitted with the guide post, and the outer wall of the self-lubricating bronze bushing is connected to the polyurethane elastic layer, which is connected to the hydraulic compensation structure.

[0007] Preferably, the self-lubricating bronze bushing includes a support bushing and a guide plate. One side of the support bushing is connected to the polyurethane elastic layer, and the upper and lower ends of the support bushing are respectively connected to the guide plate. The side of the support bushing away from the polyurethane elastic layer is in contact with the guide post, and a lubrication groove is provided on the side of the support bushing close to the guide post. Solid lubricant is embedded in the lubrication groove, and the self-lubrication target is achieved by the solid lubricant.

[0008] Preferably, a limiting groove is provided on the support plate near the socket hole, and a limiting block is fixedly connected to one end of the guide plate. The limiting block is movably connected to the limiting groove, and the movement path of the guide plate and the support bushing is restricted under the action of the limiting block and the limiting groove.

[0009] Preferably, the interior of the polyurethane elastic layer is provided with a spiral groove, which is a double spiral structure. The two ends of the spiral groove are provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are connected to the hydraulic compensation structure.

[0010] Preferably, the hydraulic compensation structure includes an oil chamber, a PLC controller, a micro plunger pump, a proportional pressure valve, and an accumulator. A pressure sensor is installed in the oil chamber to monitor the pressure in the oil chamber and send the data to the PLC controller. The micro plunger pump is connected to the proportional pressure valve through a rigid pipe. The proportional pressure valve controls the oil chamber to supply oil to the spiral groove. The accumulator maintains stable pressure to ensure a smooth compensation process.

[0011] Preferably, a hydraulic cylinder is provided at the middle position of the support plate. The hydraulic cylinder is connected to the frame and pushes the slide plate to move the upper mold up and down to achieve bending.

[0012] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0013] The four-way independent compensation structure of this utility model ensures high guiding accuracy, real-time dynamic compensation eliminates cumulative errors, the automatic compensation mechanism can offset a certain amount of wear, the self-lubricating design extends the maintenance cycle and improves the overall service life, the four independent hydraulic systems can provide differentiated compensation, can automatically correct tilting caused by uneven load, and automatically compensate for wear without manual intervention, the polyurethane elastic layer has a wide temperature resistance range and is suitable for alternating hot and cold working conditions, the spiral groove design has strong anti-pollution ability, and can still work stably even if the oil contains trace impurities. Attached Figure Description

[0014] Figure 1 This is an exploded view of the high-precision guide structure of the electro-hydraulic bending machine of this utility model;

[0015] Figure 2 This is an exploded view of the composite guide sleeve and guide post of this utility model;

[0016] Figure 3 This is an exploded view of the composite guide sleeve of this utility model;

[0017] Figure 4 This is a cross-sectional view of the composite guide sleeve of this utility model.

[0018] In the diagram: 1. Guide post; 2. Slide plate; 21. Support plate; 211. Socket hole; 212. Limiting groove; 22. Hydraulic cylinder; 3. Composite guide sleeve; 31. Self-lubricating bronze bushing; 311. Support bushing; 3111. Lubrication groove; 3112. Solid lubricant; 312. Guide plate; 3121. Limiting block; 32. Polyurethane elastic layer; 321. Spiral groove; 33. Hydraulic compensation structure. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0021] Combination Figures 1-4 This utility model discloses a high-precision guide structure for an electro-hydraulic bending machine, comprising a guide column 1 fixed on the frame and a slide plate 2 sleeved with the guide column 1. A support plate 21 is provided on one side of the slide plate 2, and sleeve holes 211 are provided at both ends of the support plate 21. A composite guide sleeve 3 is installed on the sleeve holes 211. A hydraulic cylinder 22 is provided in the middle of the support plate 21. The hydraulic cylinder 22 is connected to the frame. The hydraulic cylinder 22 pushes the slide plate 2 to drive the upper mold to move up and down to achieve bending. The composite guide sleeve 3 moves along the guide column 1 to guide the slide plate 2.

[0022] Specifically, the composite guide sleeve 3 includes a self-lubricating bronze bushing 31, a polyurethane elastic layer 32, and a hydraulic compensation structure 33. The self-lubricating bronze bushing 31 includes a support bushing 311 and a guide plate 312. One side of the support bushing 311 is connected to the polyurethane elastic layer 32. The upper and lower ends of the support bushing 311 are respectively connected to the guide plate 312. The guide plate 312 is movably connected to the upper and lower sides of the support plate 21. A limit groove 212 is formed on the support plate 21 near the socket 211. One end of the guide plate 312... A fixed connection limit block 3121 is fixedly connected to a limit groove 212. Under the action of the limit block 3121 and the limit groove 212, the movement path of the guide plate 312 and the support bushing 311 is restricted. The side of the support bushing 311 away from the polyurethane elastic layer 32 contacts the guide post 1, and a lubrication groove 3111 is provided on the side of the support bushing 311 close to the guide post 1. The lubrication groove 3111 is embedded with solid lubricant 3112, and the self-lubrication target is achieved through the solid lubricant 3112.

[0023] More specifically, the interior of the polyurethane elastic layer 32 has a spiral groove 321 with a double spiral structure. The spiral groove 321 has an oil inlet and an oil outlet at both ends, which are connected to the hydraulic compensation structure 33. The hydraulic compensation structure 33 includes an oil chamber, a PLC controller, a micro plunger pump, a proportional pressure valve, and an accumulator. It should be noted that a pressure sensor is installed in the oil chamber to monitor the pressure and send the data to the PLC controller. The micro plunger pump is connected to the proportional pressure valve via a rigid pipe. The micro plunger pump continuously outputs maximum pressure, while the proportional pressure valve reduces the pressure to the working pressure as needed. This design avoids frequent pump starts and stops. When the bending machine requires a large flow rate instantaneously, the proportional pressure valve adjusts its opening based on the pressure sensor feedback to maintain stable pressure. The accumulator instantly replenishes oil, and the oil chamber supplies hydraulic oil to the spiral groove 321. The hydraulic oil pushes the polyurethane elastic layer 32 to deform towards the guide post 1, compensating for wear gaps.

[0024] Furthermore, in this embodiment, four composite guide sleeves 3 are provided, which respectively fit the four sides of the guide post 1. Each composite guide sleeve 3 has an individual hydraulic compensation structure 33 for hydraulic compensation to ensure guiding accuracy.

[0025] Working process: Hydraulic cylinder 22 pushes slide plate 2 to move up and down along guide post 1. Four composite guide sleeves 3 simultaneously make close contact with the four surfaces of guide post 1. Self-lubricating bronze bushing 31 achieves initial lubrication through solid lubricant 3112. Slide plate 2 reciprocates under the drive of hydraulic cylinder 22. Polyurethane elastic layer 32 provides initial preload to maintain guiding stability. Pressure sensor monitors the pressure changes of each oil chamber in real time. When a pressure drop is detected on one side, it indicates the presence of wear gap. PLC controller issues a command, proportional pressure valve adjusts the pressure of the corresponding oil circuit, and micro plunger pump injects hydraulic oil into polyurethane elastic layer 32 through spiral groove 321. Polyurethane elastic layer 32 expands under pressure, pushing self-lubricating bronze bushing 31 to move towards guide post 1. Accumulator maintains stable pressure to ensure smooth compensation process. Four independent hydraulic compensation structures 33 can be adjusted separately. When uneven load occurs, the system automatically adjusts the compensation amount on each side.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present 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 present invention.

Claims

1. A high-precision guide structure for an electro-hydraulic bending machine, comprising a guide column (1) and a sliding plate (2), characterized in that, The guide post (1) is sleeved with the slide plate (2). A support plate (21) is provided on one side of the slide plate (2). The support plate (21) has sleeve holes (211) at both ends. A composite guide sleeve (3) is installed on the sleeve hole (211). The composite guide sleeve (3) is set along the inner wall of the sleeve hole (211). The composite guide sleeve (3) fits against the outer wall of the guide post (1) to work.

2. The high-precision guide structure for the electro-hydraulic bending machine according to claim 1, characterized in that, The composite guide sleeve (3) includes a self-lubricating bronze bushing (31), a polyurethane elastic layer (32), and a hydraulic compensation structure (33). The inner wall of the self-lubricating bronze bushing (31) is fitted with the guide post (1), and the outer wall of the self-lubricating bronze bushing (31) is connected to the polyurethane elastic layer (32). The polyurethane elastic layer (32) is connected to the hydraulic compensation structure (33).

3. The high-precision guide structure for the electro-hydraulic bending machine according to claim 2, characterized in that, The self-lubricating bronze bushing (31) includes a support bushing (311) and a guide plate (312). One side of the support bushing (311) is connected to the polyurethane elastic layer (32). The upper and lower ends of the support bushing (311) are respectively connected to the guide plate (312). The side of the support bushing (311) away from the polyurethane elastic layer (32) is in contact with the guide post (1). A lubrication groove (3111) is provided on the side of the support bushing (311) close to the guide post (1). Solid lubricant (3112) is embedded in the lubrication groove (3111).

4. The high-precision guide structure for the electro-hydraulic bending machine according to claim 3, characterized in that, The support plate (21) has a limiting groove (212) near the socket (211), and a limiting block (3121) is fixedly connected to one end of the guide plate (312). The limiting block (3121) is movably connected to the limiting groove (212).

5. The high-precision guide structure for the electro-hydraulic bending machine according to claim 2, characterized in that, The interior of the polyurethane elastic layer (32) is provided with a spiral groove (321). The spiral groove (321) has a double spiral structure. The two ends of the spiral groove (321) are provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are connected to the hydraulic compensation structure (33).

6. The high-precision guide structure for the electro-hydraulic bending machine according to claim 5, characterized in that, The hydraulic compensation structure (33) includes an oil chamber, a PLC controller, a micro plunger pump, a proportional pressure valve and an accumulator. A pressure sensor is installed in the oil chamber. The micro plunger pump is connected to the proportional pressure valve through a hard pipe. The proportional pressure valve controls the oil chamber to supply oil to the spiral groove (321).

7. The high-precision guide structure for the electro-hydraulic bending machine according to claim 1, characterized in that, A hydraulic cylinder (22) is provided at the middle position of the support plate (21), and the hydraulic cylinder (22) is connected to the frame.

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