Energy-saving double-pump numerical control bending machine

Abstract

The utility model discloses an energy -conserving double -pump numerical control bending machine, including bending machine frame, the bending machine frame is equipped with the sliding plate through the sliding block sliding installation on, the bending machine frame is equipped with the double -pump drive mechanism for driving the sliding plate to go up, the one side of bending machine frame is equipped with electrical control system, the lower mould is installed through the two -way degree of winding automatic compensation workstation on the bending machine frame, the utility model discloses through the impurity removal subassembly, can when the sliding plate goes down, through the compressed air bag and sprays the airflow through the spray head, accurate removal bending site impurity, the upper mounting seat check valve guarantees the stable air pressure, and a plurality of impurity removal units realize balanced cleaning, can avoid the influence processing quality of impurity, reduce the wear and tear, promote the precision and the pass rate. Meanwhile, the air bag action and the spray head airflow can accelerate the bending area air flow, and heat in time, prevent the mould and workpiece from being damaged due to high temperature, guarantee processing stable, prolong the mould life.

Description

Technical Field

[0001] This utility model mainly relates to the field of CNC bending machine technology, specifically an energy-saving dual-pump CNC bending machine. Background Technology

[0002] In modern industrial manufacturing, CNC bending machines, as key equipment for metal sheet processing, are widely used in many industries such as automobile manufacturing, aerospace, construction materials, and electronics. Through precise CNC systems controlling the movement of the slider, they achieve efficient bending and forming of metal sheets, directly impacting product precision, quality, and production efficiency. With the continuous expansion of industrial production scale and the increasing demands for processing precision, the power requirements of CNC bending machines are constantly rising, and energy consumption has gradually become a focus of industry attention. Traditional CNC bending machines mostly use a single-pump hydraulic drive system. During operation, regardless of the load, the pump unit usually runs at its rated speed. Under no-load or light-load conditions, a large amount of energy is wasted as heat through components such as relief valves, resulting in high system energy consumption. This is inconsistent with the current development trend of green manufacturing and energy conservation and emission reduction. Therefore, an energy-saving dual-pump CNC bending machine is needed.

[0003] Furthermore, during the bending process of the workpiece, debris, dust, and other impurities are easily generated at the bending area where the mold contacts the workpiece. If these impurities are not removed in time, they will remain on the mold surface or at the bending point of the workpiece. The residual impurities will affect the fitting accuracy between the mold and the workpiece, leading to quality problems such as dimensional deviations and surface scratches in the subsequently processed workpieces, thus reducing the product qualification rate. On the other hand, the continuous friction between the impurities and the workpiece will accelerate the wear of the mold, shorten its service life, and increase the maintenance cost and downtime of the equipment. Utility Model Content

[0004] This utility model provides a significantly different solution to the problem of overly simplistic existing technical solutions. It offers an energy-saving dual-pump CNC bending machine to address the shortcomings of traditional CNC bending machines, which typically use a single-pump hydraulic drive system. This single-pump hydraulic drive system operates at its rated speed regardless of load, resulting in energy waste as heat through components such as relief valves during no-load or light-load conditions. This high energy consumption contradicts the trends of green manufacturing and energy conservation. Furthermore, during bending, debris and dust easily accumulate at the contact points between the die and the workpiece. If not removed promptly, these impurities affect the fit accuracy, leading to workpiece dimensional deviations, surface scratches, reduced yield, accelerated die wear, shortened lifespan, and increased maintenance costs and downtime.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: An energy-saving dual-pump CNC bending machine includes a bending machine frame, on which a sliding plate is slidably mounted via a slider. The bending machine frame is equipped with a dual-pump drive mechanism for driving the sliding plate upwards. An electrical control system is located on one side of the bending machine frame. A lower die is mounted on the bending machine frame via a bidirectional deflection automatic compensation worktable. An upper die is mounted on the sliding plate via several quick-adjusting clamps. The bending machine frame contains a CNC back gauge and a cleaning assembly for removing impurities from the die surface.

[0006] The impurity removal component includes an airbag, with an upper mounting base and a lower mounting base installed at the upper and lower ends of the airbag, respectively. The bottom of the lower mounting base is connected to a three-way pipe through an exhaust one-way valve, and the outer wall of the three-way pipe is provided with nozzles arranged evenly and at equal intervals.

[0007] More preferably, the upper mounting base is provided with an upper mounting bracket at its top, the lower mounting base is provided with a lower mounting bracket at its bottom, the lower mounting bracket is mounted on the bending machine frame, and the upper mounting bracket is mounted on the sliding plate.

[0008] More preferably, the upper mounting base is provided with a plurality of one-way air intake valves arranged in a ring, the one-way air intake valves being used to control the one-way flow of air into the airbag.

[0009] More preferably, the upper mounting base, lower mounting base, airbag, three-way pipe and nozzle are configured as a set of impurity removal units, and there are multiple sets of such impurity removal units, which are evenly and equidistantly distributed on the lower mounting frame.

[0010] More preferably, the dual-pump drive mechanism includes two servo variable pumps (one large and one small), a hydraulic cylinder, an integrated valve block, a servo motor, an oil tank, and a liquid level control relay.

[0011] More preferably, the front end of the bending machine frame is provided with a linear guide rail, and a movable bracket is slidably mounted on the linear guide rail.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This CNC bending machine, when performing bending operations, allows the sliding plate to move up to a preset position, and the sliding plate and upper die to fall freely to bend the workpiece, thereby improving the energy efficiency of the device. Furthermore, through the impurity removal component, when the sliding plate moves downward, the upper mounting frame moves downward synchronously, driving the upper mounting seat to compress the air bladder. The gas in the air bladder enters the three-way pipe through the one-way valve at the bottom of the lower mounting seat, and is then sprayed out through the evenly spaced inclined nozzles on its outer wall. The airflow precisely blows over the upper part of the lower die and the bending part of the workpiece and the upper die, which can promptly remove debris, dust and other impurities generated during the bending process. Meanwhile, multiple one-way valves arranged in a ring on the upper mounting base ensure that the airbag maintains the required air pressure, providing a continuous and stable airflow power for the nozzle; multiple sets of uniformly distributed impurity removal units work together to further ensure that all areas of the mold and workpiece bending parts are cleaned by balanced airflow. Compared with traditional CNC bending machines, this avoids the impact of impurity residue on processing quality, reduces mold wear and workpiece surface damage caused by impurities, and thus improves the processing accuracy and pass rate of the product.

[0013] Furthermore, the air intake and exhaust actions of the airbags in the impurity removal component, combined with the airflow from the nozzle, can drive the air around the bending area to circulate rapidly, accelerating heat dissipation. Especially during continuous bending operations, the friction between the mold and the workpiece generates heat, and the continuously flowing airflow can promptly remove this heat, preventing the mold and workpiece from being affected by prolonged high temperatures, thus extending the mold's service life and preventing workpiece deformation due to overheating, ensuring the stability and reliability of the processing.

[0014] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the rear view structure of this utility model; Figure 3 This is an enlarged structural schematic diagram of the impurity removal component of this utility model.

[0016] Numbering on the map: 1. Bending machine frame; 2. Sliding plate; 3. Dual pump drive mechanism; 4. Electrical control system; 5. Linear guide rail; 6. Movable bracket; 7. Bidirectional deflection automatic compensation worktable; 8. Lower die; 9. Quick-adjusting clamp; 10. Upper die; 11. CNC back gauge; 12. Impurity removal assembly; 1201. Upper mounting frame; 1202. Lower mounting frame; 1203. Upper mounting base; 1204. Lower mounting base; 1205. Airbag; 1206. T-pipe; 1207. Nozzle. Detailed Implementation

[0017] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0018] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Please refer to the appendix carefully. Figure 1-3 An energy-saving dual-pump CNC bending machine includes a bending machine frame 1, a sliding plate 2 slidably mounted on the bending machine frame 1 via a slider, a dual-pump drive mechanism 3 for driving the sliding plate 2 upward on the bending machine frame 1, an electrical control system 4 on one side of the bending machine frame 1, a lower die 8 mounted on the bending machine frame 1 via a bidirectional deflection automatic compensation worktable 7, and an upper die 10 mounted on the sliding plate 2 via several quick-adjusting clamps 9; a CNC back gauge 11 and a cleaning component 12 for removing impurities from the die surface are provided inside the bending machine frame 1.

[0020] The impurity removal component 12 includes an airbag 1205 (which may be made of fatigue-resistant rubber or polyurethane material). An upper mounting base 1203 and a lower mounting base 1204 are respectively installed at the upper and lower ends of the airbag 1205. The bottom of the lower mounting base 1204 is connected to a three-way pipe 1206 through an exhaust one-way valve. The outer wall of the three-way pipe 1206 is provided with nozzles 1207 arranged evenly and at equal intervals. The nozzles 1207 are set at an angle, and the spray angle is directed towards the contact area between the mold and the workpiece, so that the airflow can blow over the upper part of the lower mold 8. A dustproof net is provided on the exhaust one-way valve.

[0021] In this embodiment, as Figure 3 As shown, the upper mounting base 1203 is provided with an upper mounting bracket 1201 at its top, and the lower mounting base 1204 is provided with a lower mounting bracket 1202 at its bottom. The lower mounting bracket 1202 is mounted on the bending machine frame 1, and the upper mounting bracket 1201 is mounted on the sliding plate 2. Based on the linkage between the upper mounting bracket 1201 and the sliding plate 2, the upper part of the impurity removal component 12 can move synchronously with the sliding plate 2, thereby causing the airbag 1205 to complete the air intake and exhaust actions.

[0022] In this embodiment, as Figure 3As shown, the upper mounting base 1203 is equipped with multiple one-way air inlets arranged in a ring, and each one-way air inlet valve is fitted with a dust screen. These one-way air inlets control the unidirectional flow of air into the airbag 1205. The design of multiple one-way valves in a ring allows air to be introduced into the airbag 1205 from different directions, resulting in more even force distribution and a smoother inflation process. This avoids uneven deformation of the airbag 1205 due to excessive local air pressure. The unidirectional flow control function of the one-way air inlets ensures that external air can only flow into the airbag 1205 in one direction, preventing backflow and leakage of compressed air within the airbag 1205. This ensures that the airbag 1205 can stably maintain the required air pressure, providing a continuous and stable power source for the subsequent airflow ejected through the nozzle 1207 to remove impurities from the mold.

[0023] In this embodiment, as Figure 3 As shown, the upper mounting base 1203, lower mounting base 1204, airbag 1205, three-way pipe 1206, and nozzle 1207 are set as a group of impurity removal units, and there are multiple groups of such impurity removal units. These multiple groups of impurity removal units are evenly and equidistantly distributed on the lower mounting frame 1202. The setting of multiple groups of impurity removal units broadens the impurity removal coverage area, and the evenly and equidistantly distributed layout makes the impurity removal effect of each unit more balanced. This ensures that the mold surface can be cleaned by airflow of equal force, avoids local impurity residue, and ensures the consistency and stability of the impurity removal effect.

[0024] In this embodiment, as Figure 1 and Figure 2 As shown, the dual-pump drive mechanism 3 consists of two sets of servo variable pumps (one large and one small), oil cylinders, integrated valve blocks, servo motors, oil tanks, and liquid level control relays. The integrated valve block integrates components such as a directional valve, a flow valve, a high and low pressure pump confluence valve, a proportional relief valve, and a pressure sensor, which can centrally control the pressure, flow, and direction of hydraulic oil.

[0025] The servo motor configuration can dynamically adjust the pump's output power according to actual working conditions, achieving energy-saving operation of the hydraulic system. The hydraulic level control relay, as an auxiliary monitoring element, can monitor the hydraulic oil level in the tank in real time. When the level falls below a set threshold, it can issue a timely warning to prevent system failure due to insufficient oil. The hydraulic cylinder can efficiently convert hydraulic energy into mechanical energy, providing a powerful and stable driving force for the upward movement of the sliding plate 2. The large pump provides the high flow rate required for the rapid descent and return of the slide block, while the small pump provides the high pressure and low flow rate required for the working and holding stages. The electrical control system 4 incorporates an energy-saving control module that dynamically adjusts the speed and torque of the two servo motors based on the pressure and flow rate required at each stage of the bending process. It should be noted that the dual-pump CNC bending machine used in this utility model is a mature existing technology, therefore, its components and control system will not be described in detail here.

[0026] In this embodiment, as Figure 1 As shown, a linear guide rail 5 is provided at the front end of the bending machine frame 1, and a movable bracket 6 is slidably mounted on the linear guide rail 5. The linear guide rail 5 provides a stable sliding guide for the movable bracket 6, ensuring that the bracket runs smoothly and without deviation during movement, improving the accuracy of bracket position adjustment. The movable bracket 6 can slide flexibly along the linear guide rail 5, which can adapt to the support requirements of workpieces of different lengths. When processing longer workpieces, the middle or end of the workpiece can be reliably supported by adjusting the position of the bracket.

[0027] The specific operating procedure of this utility is as follows: When the equipment is running, the electrical control system 4 coordinates and regulates the coordinated work of all components. First, the operator adjusts the position of the back gauge 11 according to the specifications of the workpiece to be processed to ensure accurate workpiece positioning. At the same time, the upper mold 10 is installed using the quick-adjusting clamp 9 on the sliding plate 2, and the corresponding lower mold 8 is fixed by the bidirectional deflection automatic compensation worktable 7, completing the mold assembly and positioning before processing.

[0028] When bending is performed by the dual-pump drive mechanism 3, the servo motor dynamically adjusts its output power according to the working conditions. Through integrated components such as directional valves, pressure valves, and flow valves within the integrated valve block, the pressure, flow rate, and direction of the hydraulic oil are precisely controlled. Driven by hydraulic energy, the cylinder converts this energy into mechanical energy, causing the sliding plate 2 to move upwards along the slider on the bending machine frame 1, separating the upper die 10 from the lower die 8. During bending, the dual-pump drive mechanism 3 stops working, and the sliding plate 2, due to gravity (its weight is relatively large), falls freely. The upper die 10, in conjunction with the lower die 8, bends the workpiece, completing the bending process. During the operation of the dual-pump drive mechanism 3, the level control relay monitors the hydraulic oil level in the tank in real time. When the level falls below a set threshold, a warning is issued promptly to ensure the stable operation of the hydraulic system. The position of the movable bracket 6 is adjusted by the linear guide rail 5 to provide reliable support for the middle or end of the workpiece. During the processing, the impurity removal component 12 simultaneously removes impurities from the mold surface. When the sliding plate 2 moves downward, the upper mounting bracket 1201 moves downward synchronously with the sliding plate 2, driving the upper mounting seat 1203 to compress the air bladder 1205. The gas in the air bladder 1205 enters the three-way pipe 1206 through the one-way valve at the bottom of the lower mounting seat 1204, and is then sprayed out through the inclined nozzles 1207 evenly spaced on its outer wall. The airflow blows over the upper part of the lower mold 8 to remove impurities from the workpiece and the bent parts on the upper mold 10. When the sliding plate 2 moves upward, the upper mounting bracket 1201 drives the upper mounting seat 1203 to rise, and the air bladder 1205 resets and expands. At this time, the one-way valves distributed in a ring on the upper mounting seat 1203 control the unidirectional flow of external air into the air bladder 1205, which is the reserve air pressure for the next exhaust and impurity removal. Multiple uniformly and equidistantly distributed impurity removal units work together to ensure that all areas of the mold surface are cleaned by a balanced airflow, avoiding the impact of impurities on processing quality. During the processing, the sliding plate 2 and the upper mold 10 fall freely to bend the workpiece, thereby improving the energy efficiency of the device.

[0029] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. An energy-saving dual-pump CNC bending machine, comprising a bending machine frame (1), characterized in that: A sliding plate (2) is slidably mounted on the bending machine frame (1) via a slider. The bending machine frame (1) is equipped with a dual-pump drive mechanism (3) for driving the sliding plate (2) to move upward. An electrical control system (4) is provided on one side of the bending machine frame (1). A lower die (8) is mounted on the bending machine frame (1) via a bidirectional deflection automatic compensation worktable (7). An upper die (10) is mounted on the sliding plate (2) via several quick-adjusting clamps (9). A CNC back gauge (11) and a cleaning component (12) for removing impurities from the die surface are provided inside the bending machine frame (1). The impurity removal component (12) includes an airbag (1205), with an upper mounting base (1203) and a lower mounting base (1204) installed at the upper and lower ends of the airbag (1205), respectively. The bottom of the lower mounting base (1204) is connected to a three-way pipe (1206) through an exhaust one-way valve, and the outer wall of the three-way pipe (1206) is provided with nozzles (1207) arranged evenly and at equal intervals.

2. The energy-saving dual-pump CNC bending machine according to claim 1, characterized in that: The upper mounting base (1203) is provided with an upper mounting bracket (1201) at its top, and the lower mounting base (1204) is provided with a lower mounting bracket (1202) at its bottom. The lower mounting bracket (1202) is mounted on the bending machine frame (1), and the upper mounting bracket (1201) is mounted on the sliding plate (2).

3. The energy-saving dual-pump CNC bending machine according to claim 2, characterized in that: The upper mounting base (1203) is provided with a plurality of one-way air intake valves arranged in a ring, which are used to control the one-way flow of air into the airbag (1205).

4. The energy-saving dual-pump CNC bending machine according to claim 2, characterized in that: The upper mounting base (1203), lower mounting base (1204), airbag (1205), three-way pipe (1206) and nozzle (1207) are configured as a set of impurity removal units, and there are multiple sets of such impurity removal units, which are evenly and equidistantly distributed on the lower mounting frame (1202).

5. The energy-saving dual-pump CNC bending machine according to claim 1, characterized in that: The dual-pump drive mechanism (3) includes two servo variable pumps of different sizes, a cylinder, an integrated valve block, a servo motor, an oil tank, and a level control relay.

6. The energy-saving dual-pump CNC bending machine according to claim 1, characterized in that: The front end of the bending machine frame (1) is provided with a linear guide rail (5), and a movable bracket (6) is slidably installed on the linear guide rail (5).

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