Quick die changing and locking mechanism of electro-hydraulic bending machine and working method

Abstract

The invention discloses a quick die changing and locking mechanism of an electro-hydraulic bending machine and a working method, and belongs to the technical field of bending machines. A rapid die changing locking mechanism of an electro-hydraulic bending machine comprises a locking groove connected with a rack, a supporting base is arranged in the locking groove, the upper surface of the supporting base is connected with a magnetic suction plate through an electric lifting rod, and infrared lasers are arranged on the two sides of the supporting base and used for detecting the offset of a lower die. Clamping plates are symmetrically arranged on the two sides of the supporting base. According to the rapid die changing and locking mechanism of the electro-hydraulic bending machine and the working method, the inclined design of the clamping plate is matched with the V-shaped groove to achieve rapid centering, the die changing time is shortened, the clamping process is slow and then fast through non-equal-pitch adjustment of the threaded rod, efficiency and stability are both considered, infrared laser real-time detection is combined with automatic offset compensation of an electric fine adjustment wheel, and the working efficiency is improved. And the supporting spring dynamically adjusts the inclination angle of the clamping plate.

Description

Technical Field

[0001] The present invention relates to the technical field of bending machines, and particularly to a quick die-changing locking mechanism and working method for an electro-hydraulic bending machine. Background Art

[0002] The die replacement and positioning of traditional electro-hydraulic bending machines mainly rely on manual adjustment, which has problems such as relying on manual locking and calibration, taking a long time, affecting the production rhythm, mechanical clamping being prone to die offset due to vibration or uneven force, affecting the bending accuracy, and lacking a real-time position detection and compensation mechanism, making it difficult to meet the requirements of high-precision and quick die change. Summary of the Invention

[0003] The purpose of the present invention is to provide a quick die-changing locking mechanism and working method for an electro-hydraulic bending machine. By the inclined design of the clamping plate in cooperation with the V-shaped groove to achieve quick centering, shortening the die-changing time, the non-uniform pitch adjustment of the threaded rod makes the clamping process slow first and then fast, taking into account both efficiency and stability, and the infrared laser detects in real time, combined with the electric fine-tuning wheel to automatically compensate for the offset, realizing quick die change, and solving the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A quick die-changing locking mechanism for an electro-hydraulic bending machine, including a locking groove connected to the frame. Inside the locking groove, there is a support base. The upper surface of the support base is connected to a magnetic attraction plate through an electric lifting rod. On both sides of the support base, there are infrared lasers for detecting the offset of the lower die. On both sides of the support base, clamping plates are symmetrically arranged. The clamping plates and the magnetic attraction plate jointly clamp and fix the lower die. At both ends of the clamping plate, moving components are symmetrically arranged. An activity groove is opened on the lower side of the clamping plate, and a limiting component is movably connected to the activity groove. The limiting component is used to limit the tilting direction of the clamping plate.

[0005] Preferably, the moving component includes a sliding rod, a limiting block, and a threaded rod. The two ends of the threaded rod are movably connected to the end face of the locking groove through bearing seats. The thread directions at both ends of the threaded rod are opposite. Under the action of the reverse threads at both ends of the threaded rod, the limiting blocks move towards or away from each other simultaneously, and the two ends of the threaded rod are respectively engaged with the limiting blocks. One end of the sliding rod is movably connected to the limiting block, and the other end of the sliding rod is fixedly connected to the clamping plate.

[0006] Preferably, a chute matching the sliding rod is opened on the end side plate of the locking groove. The sliding rod moves in the chute, and the chute restricts the sliding rod to only move horizontally.

[0007] Preferably, a rotating handle is arranged at one end of the threaded rod. By rotating the rotating handle, the threaded rod can be driven to rotate, and the clamping plate can be driven by the sliding rod to change the inclination angle. The thread on the threaded rod is set with non-uniform pitch, and the limiting block is limited at the end position of the chute and cannot easily displace.

[0008] Preferably, the limiting component includes a slider, a rotating block, a guiding rod, and a supporting spring. The slider is sleeved on the guiding rod. The lower end of the guiding rod is fixedly connected to the rotating block, and a supporting spring is sleeved on the guiding rod. The upper and lower ends of the supporting spring abut against the slider and the rotating block respectively. Under the supporting action of the supporting spring, the slider and the rotating block are separated to the maximum distance, and the supporting spring uses its elastic force to limit the relative positions of the guiding rod and the clamping plate to remain unchanged.

[0009] Preferably, a first rotating shaft is arranged in the moving groove. The slider is movably connected to the first rotating shaft through a bearing seat. Second rotating shafts are arranged on both sides of the rotating block, and the second rotating shafts are connected to the bottom of the locking groove through bearing seats.

[0010] Preferably, V-shaped grooves are symmetrically formed on both sides of the lower mold. The lower surface of the lower mold is a mirror surface. The clamping plate contacts the side wall of the V-shaped groove to fix it.

[0011] Preferably, an electromagnet is embedded in the magnetic attraction plate. By energizing the electromagnet, the lower mold is adsorbed by the magnetic attraction plate to prevent the displacement of the lower mold. A support rod is arranged at the middle position of the support base. When the magnetic attraction plate descends, the support rod can support the lower mold. A fine-tuning motor is embedded at a position of the support base close to the end. The output end of the fine-tuning motor is connected to a fine-tuning wheel, and anti-slip lines are formed on the fine-tuning wheel.

[0012] Preferably, the infrared laser includes an infrared laser light source, a detector, and a signal processing unit. The infrared laser light source irradiates the bottom surface of the object from the bottom of the lower mold. The reflected light is received by the detector. The signal processing unit extracts the occlusion boundary, judges whether there is an offset by the symmetry of the spot positions on both sides of the lower mold, and controls the operation of the fine-tuning wheel.

[0013] Another technical problem to be solved by the present invention is to provide a working method for the quick die-changing locking mechanism of an electro-hydraulic bending machine, including the following steps:

[0014] Step 1: Place the lower mold on the support base and contact the inclined clamping plate. Preliminary centering is achieved through the spring pre-tightening force of the clamping plate.

[0015] Step 2: Control the upper end of the clamping plate to incline inward to complete the quick clamping of the lower mold.

[0016] Step 3: The infrared laser irradiates the lower surface of the lower mold from the bottom. The reflected light is received by the detector. It is determined whether the mold is offset, the offset amount and direction are calculated, the magnetic attraction plate descends, and the position of the lower mold is finely adjusted until the target position.

[0017] Step 4: The magnetic attraction plate rises and is energized to adsorb, and jointly locks the lower mold with the clamping plate to prevent displacement caused by processing vibration.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The quick die change locking mechanism and working method of the electro-hydraulic bending machine proposed by the present invention. The inclined design of the clamping plate cooperates with the V-shaped groove to achieve quick centering, shortening the die change time. The non-uniform pitch adjustment of the threaded rod makes the clamping process slow first and then fast, taking into account both efficiency and stability. The infrared laser detects in real time, and combines with the electric fine-tuning wheel to automatically compensate for the offset, improving the positioning accuracy. The support spring dynamically adjusts the inclination angle of the clamping plate to adapt to different die sizes. The electromagnetic adsorption and mechanical clamping act synergistically, significantly enhancing the anti-vibration ability. The whole process from detection to fine-tuning is automated, reducing manual intervention and realizing quick die change. Description of the Drawings

[0020] Figure 1 It is the overall structure diagram of the quick die change locking mechanism of the electro-hydraulic bending machine of the present invention;

[0021] Figure 2 It is the partial exploded view of the quick die change locking mechanism of the electro-hydraulic bending machine of the present invention;

[0022] Figure 3 It is the partial structure diagram of the clamping plate of the present invention;

[0023] Figure 4 It is the schematic diagram of the state of the first step of the lower die installation of the present invention;

[0024] Figure 5 It is the schematic diagram of the state of the second step of the lower die installation of the present invention;

[0025] Figure 6 It is the schematic diagram of the state of the third step of the lower die installation of the present invention.

[0026] In the figure: 1, locking groove; 11, support base; 12, sliding groove; 13, electric lifting rod; 14, magnetic attraction plate; 15, support rod; 16, fine-tuning wheel; 17, infrared laser; 2, clamping plate; 21, moving component; 211, sliding rod; 212, limiting block; 213, threaded rod; 22, moving groove; 221, first rotating shaft; 23, limiting component; 231, sliding block; 232, rotating block; 2321, second rotating shaft; 233, guiding rod; 234, support spring; 3, lower die; 31, V-shaped groove. Detailed Embodiment

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] To solve the problems existing in the prior art, such as relying on manual locking and calibration, which takes a long time and affects the production rhythm, mechanical clamping is prone to cause die offset due to vibration or uneven force, affecting the bending accuracy, and lacking a real-time position detection and compensation mechanism, making it difficult to meet the requirements of high-precision and rapid die change, please refer to Figures 1-6 , the following technical solutions are provided in this embodiment:

[0029] A rapid die change locking mechanism for an electro-hydraulic bending machine, including a locking groove 1 connected to the frame. A support base 11 is arranged inside the locking groove 1. Clamping plates 2 are symmetrically arranged on both sides of the support base 11, and the clamping plates 2 clamp and fix the lower die 3.

[0030] Specifically, the clamping plates 2 are inclined, and moving components 21 are symmetrically arranged at both ends of the clamping plates 2. The moving components 21 are arranged at the upper position of the clamping plates 2. An activity groove 22 is opened on the side of the clamping plates 2 close to the lower part, and a limiting component 23 is movably connected to the activity groove 22. The limiting component 23 is used to limit the inclination direction of the clamping plates 2.

[0031] More specifically, the moving component 21 includes a sliding rod 211, a limiting block 212, and a threaded rod 213. The two ends of the threaded rod 213 are movably connected to the end face of the locking groove 1 through bearing seats. The thread directions at both ends of the threaded rod 213 are opposite, and the limiting blocks 212 are respectively engaged with both ends of the threaded rod 213. One end of the sliding rod 211 is movably connected to the limiting block 212, and the other end of the sliding rod 211 is fixedly connected to the clamping plate 2. A sliding groove 12 matching the sliding rod 211 is opened on the end side plate of the locking groove 1. The sliding rod 211 moves in the sliding groove 12, and the sliding groove 12 restricts the sliding rod 211 to only move horizontally. A rotating handle is arranged at one end of the threaded rod 213. By rotating the rotating handle, the threaded rod 213 can be driven to rotate. Under the action of the reverse threads at both ends of the threaded rod 213, the limiting blocks 212 move towards or away from each other at the same time, and the clamping plates 2 are driven by the sliding rods 211 to change the inclination angle. In addition, the threads on the threaded rod 213 are set with unequal pitches, so that when the limiting blocks 212 move from one end of the sliding groove 12 to the other end, the speed increases from slow to fast and then from fast to slow. The limiting blocks 212 are limited at the end positions of the sliding groove 12 and cannot be easily displaced.

[0032] Please refer to Figure 3, in this embodiment, a first rotating shaft 221 is arranged in the movable slot 22. The first rotating shaft 221 is movably connected to the limiting component 23, and the limiting component 23 can rotate around the first rotating shaft 221. Specifically, the limiting component 23 includes a slider 231, a rotating block 232, a guide rod 233 and a supporting spring 234. The slider 231 is movably connected to the first rotating shaft 221 through a bearing seat. The slider 231 is also sleeved on the guide rod 233. The lower end of the guide rod 233 is fixedly connected to the rotating block 232, and a supporting spring 234 is sleeved on the guide rod 233. The upper and lower ends of the supporting spring 234 are respectively abutted against the slider 231 and the rotating block 232. Under the supporting action of the supporting spring 234, the slider 231 and the rotating block 232 are separated to the maximum distance. Second rotating shafts 2321 are arranged on both sides of the rotating block 232. The second rotating shafts 2321 are connected to the bottom of the locking slot 1 through bearing seats. Under the action of the supporting spring 234, the inclination directions of the guide rod 233 and the clamping plate 2 are opposite. As Figure 4 shown, when the lower mold 3 is not clamped, the upper end of the clamping plate 2 inclines away from the lower mold 3, and the guide rod 233 inclines towards the lower mold 3. When clamping the lower mold 3, as Figure 5 shown, the upper end of the clamping plate 2 inclines towards the lower mold 3, and the guide rod 233 inclines away from the lower mold 3. The clamping plate 2 clamps the lower mold 3, and the supporting spring 234 uses its elastic force to limit the relative positions of the guide rod 233 and the clamping plate 2 to remain unchanged.

[0033] To improve the clamping stability of the lower mold 3, V-shaped grooves 31 are symmetrically formed on both sides of the lower mold 3. The clamping plate 2 contacts the side walls of the V-shaped grooves 31 to fix it. However, this step of fixing is a preliminary positioning to quickly place the lower mold 3 on the support base 11, and the next step is to perform fine position adjustment.

[0034] Specifically, electric lifting rods 13 are embedded at the four corners of the support base 11. The upper ends of the electric lifting rods 13 are fixedly connected with magnetic attraction plates 14. Electromagnets are embedded in the magnetic attraction plates 14. By energizing the electromagnets, the lower die 3 is adsorbed by the magnetic attraction plates 14 to position the lower die 3 and prevent the lower die 3 from displacing. A support rod 15 is arranged at the middle position of the support base 11. When the magnetic attraction plate 14 descends, the support rod 15 can support the lower die 3. Meanwhile, a fine-tuning motor is embedded at a position of the support base 11 close to the end. The output end of the fine-tuning motor is connected with a fine-tuning wheel 16. Anti-slip lines are provided on the fine-tuning wheel 16. When it is detected that the position of the lower die 3 is deviated, the magnetic attraction plate 14 descends under the action of the electric lifting rod 13, and the support rod 15 supports the middle position of the lower surface of the lower die 3. The fine-tuning motor controls the fine-tuning wheel 16 to rotate according to the deviation amount of the lower die 3, and pushes the lower die 3 to translate or rotate until the lower die 3 reaches the target position. Then the magnetic attraction plate 14 is raised until it contacts the lower die 3, and power is supplied to the magnetic attraction plate 14. The lower die 3 is adsorbed and fixed by the magnetic attraction plate 14. At this time, the suction force of the magnetic attraction plate 14 and the thrust of the electric lifting rod 13 fix the lower die 3 between the clamping plate 2 and the magnetic attraction plate 14, and stabilize the position of the lower die 3 without movement.

[0035] To realize the automatic detection of the position deviation of the lower die 3, infrared lasers 17 are arranged on both sides of the support base 11. Specifically, the infrared laser 17 includes an infrared laser light source, a detector and a signal processing unit. The infrared laser light source irradiates the bottom surface of the object from the bottom of the lower die 3. The lower surface of the lower die 3 is a mirror structure to reflect the light source, and the reflected light is received by the detector. The signal processing unit extracts the occlusion boundary, judges whether there is a deviation by the symmetry of the light spot positions on both sides of the lower die 3, and controls the corresponding fine-tuning wheel 16 to rotate according to the deviated position to adjust the position of the lower die 3 until the light spot positions on both sides of the lower die 3 are symmetrical.

[0036] To better show the working process of the quick die change and locking mechanism of the electro-hydraulic bending machine, the present embodiment now proposes a working method of the quick die change and locking mechanism of the electro-hydraulic bending machine, including the following steps:

[0037] Step 1: Place the lower die 3 on the support base 11. The V-shaped grooves 31 on both sides thereof are in contact with the inclined clamping plates 2, and preliminary centering is realized through the spring pre-tightening force of the clamping plates 2.

[0038] Step 2: Rotate the handle of the threaded rod 213 to drive the limit blocks 212 to move towards each other, and push the upper ends of the clamping plates 2 to incline inward through the slide rods 211 to complete the quick clamping of the die.

[0039] Step 3: The infrared laser 17 irradiates the lower surface of the mirror surface of the lower mold 3 from the bottom, and the reflected light is received by the detector. The signal processing unit analyzes the symmetry of the light spots on both sides. If they are asymmetric, it is determined that the mold is offset, and the offset amount and direction are calculated; the magnetic attraction plate 14 descends, the support rod 15 jacks up the mold, releasing the clamping force, and the fine-tuning motor drives the fine-tuning wheel 16 to rotate, pushing the mold to translate or rotate to the target position;

[0040] Step 4: The magnetic attraction plate 14 rises and is energized to adsorb, and locks the lower mold 3 together with the clamping plate 2. The inclination angle of the clamping plate 2 is self-locked by the non-uniform pitch threaded rod 213, ensuring that the clamping force increases as the force on the mold increases. The double fixation of electromagnetic adsorption and mechanical clamping prevents displacement caused by machining vibration.

[0041] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0042] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. The quick die change and locking mechanism of an electro-hydraulic bending machine, including a locking groove (1) connected to the machine frame, is characterized in that, Inside the locking groove (1), there is a support base (11). The upper surface of the support base (11) is connected to a magnetic attraction plate (14) through an electric lifting rod (13). On both sides of the support base (11), there are infrared lasers (17) for detecting the offset of the lower die (3). On both sides of the support base (11), there are symmetrically arranged clamping plates (2). The clamping plates (2) and the magnetic attraction plate (14) jointly clamp and fix the lower die (3). At both ends of the clamping plate (2), there are symmetrically arranged moving components (21). An activity groove (22) is opened on the lower side of the clamping plate (2), and a limiting component (23) is movably connected to the activity groove (22).

2. The quick die change and locking mechanism of the electro-hydraulic bending machine according to claim 1, characterized in that, The moving component (21) includes a slide rod (211), a limiting block (212), and a threaded rod (213). The two ends of the threaded rod (213) are movably connected to the end face of the locking groove (1) through bearing seats. The thread directions at both ends of the threaded rod (213) are opposite, and the two ends of the threaded rod (213) are respectively engaged with limiting blocks (212). One end of the slide rod (211) is movably connected to the limiting block (212), and the other end of the slide rod (211) is fixedly connected to the clamping plate (2).

3. The quick die change and locking mechanism of the electro-hydraulic bending machine according to claim 2, characterized in that, On the end side plate of the locking groove (1), there is a chute (12) matching the slide rod (211).

4. The quick die change and locking mechanism of the electro-hydraulic bending machine according to claim 3, characterized in that, One end of the threaded rod (213) is provided with a rotating handle, and the thread on the threaded rod (213) is set with unequal pitches.

5. The quick die change and locking mechanism of the electro-hydraulic bending machine according to claim 1, characterized in that, The limiting component (23) includes a slider (231), a rotating block (232), a guide rod (233), and a support spring (234). The slider (231) is sleeved on the guide rod (233). The lower end of the guide rod (233) is fixedly connected to the rotating block (232), and a support spring (234) is sleeved on the guide rod (233). The upper and lower ends of the support spring (234) are respectively abutted against the slider (231) and the rotating block (232).

6. The quick die change and locking mechanism of the electro-hydraulic bending machine according to claim 5, characterized in that, Inside the activity groove (22), there is a first rotating shaft (221). The slider (231) is movably connected to the first rotating shaft (221) through a bearing seat. On both sides of the rotating block (232), there are second rotating shafts (2321). The second rotating shafts (2321) are connected to the bottom of the locking groove (1) through bearing seats.

7. The quick die change and locking mechanism of the electro-hydraulic bending machine according to claim 1, characterized in that, On both sides of the lower die (3), there are symmetrically opened V-shaped grooves (31), and the lower surface of the lower die (3) is a mirror surface.

8. The quick die change and locking mechanism of the electro-hydraulic bending machine according to claim 7, characterized in that, The magnetic attraction plate (14) is embedded with an electromagnet. In the middle position of the support base (11), there is a support rod (15). Near the end of the support base (11), there is an embedded fine-tuning motor. The output end of the fine-tuning motor is connected to a fine-tuning wheel (16), and the fine-tuning wheel (16) is provided with anti-slip lines.

9. The quick die change and locking mechanism of the electro-hydraulic bending machine according to claim 8, characterized in that, The infrared laser (17) includes an infrared laser light source, a detector, and a signal processing unit. The infrared laser light source irradiates the bottom surface of an object from the bottom of the lower die (3). The reflected light is received by the detector. The signal processing unit extracts the occlusion boundary, judges whether there is an offset by the symmetry of the light spot positions on both sides of the lower die (3), and controls the fine-tuning wheel (16) to work.

10. A working method of a quick die change and locking mechanism for an electro-hydraulic bending machine as described in claim 9, characterized in that, Including the following steps: Step 1: Place the lower mold (3) on the support base (11) and contact the inclined clamping plate (2), and achieve preliminary centering through the spring pre-tightening force of the clamping plate (2). Step 2: Control the upper end of the clamping plate (2) to incline inward to complete the rapid clamping of the lower mold (3). Step 3: The infrared laser (17) irradiates the lower surface of the lower mold (3) from the bottom, the reflected light is received by the detector, the mold offset is judged, the offset amount and direction are calculated, the magnetic attraction plate (14) descends, and the position of the lower mold (3) is finely adjusted until the target position is reached. Step 4: The magnetic attraction plate (14) rises and is energized to adsorb, and jointly locks the lower mold (3) with the clamping plate (2) to prevent displacement caused by machining vibration.

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