Sliding buffering device of press machine

Abstract

The utility model belongs to the technical field of press machines, and particularly relates to a sliding buffer device of a press machine, which comprises a working table and a support arranged on the working table, a hydraulic assembly is arranged on the support, two sliding chutes and four first buffer assemblies are arranged at the top of the working table, and a lower die is arranged at the tops of the four first buffer assemblies. A rectangular hollow shell is arranged in each sliding groove, a piston plate is arranged in each rectangular hollow shell, a plurality of through holes communicating with the rectangular hollow shell are formed in one side of each rectangular hollow shell, a plurality of sealing rods different in length are arranged on the side, close to the through holes, of each piston plate, and a moving rod is arranged on the other side of each piston plate. And the side, away from the piston plate, of the moving rod penetrates out of the rectangular hollow shell and is provided with a connecting plate, a movable plate is hinged to the connecting plate, the end, away from the connecting plate, of the movable plate is hinged to the lower die, the device can achieve efficient absorption and attenuation of impact force and precise control over the die reset process, and the service life of the die is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of press machine, specifically relates to a sliding buffer device of press machine. BACKGROUND

[0002] In modern manufacturing industry, press machine is a kind of vital equipment, is widely used in metal processing, automobile manufacturing, aerospace and many other fields.Press machine changes the shape and size of workpiece by exerting huge pressure to meet various production needs.

[0003] However, in the stamping work process of press machine, it faces a series of severe challenges.When the hydraulic assembly rapidly exerts pressure and contacts the workpiece on the lower die, the instantaneous impact force is extremely strong.

[0004] In the past technology, in order to deal with this impact force, the common method is to adopt simple mechanical buffer structure or single elastic element, such as ordinary spring or rubber pad.These traditional buffering methods have obvious defects.

[0005] Firstly, mechanical buffer structure can usually only provide limited buffer stroke and buffer force, and the absorption effect of larger impact force is poor, which can easily lead to fatigue cracks, deformation or even fracture of the key parts of the die and equipment due to frequent bearing of strong impact in long-term use.

[0006] Secondly, single elastic element such as spring can easily produce irreversible plastic deformation after several high-strength stamping, so as to lose the original elastic performance and reduce the buffering effect.Moreover, since the elastic characteristics of spring are relatively fixed, it cannot be flexibly self-adapted to adjust according to different stamping conditions and impact force.

[0007] In addition, the traditional buffer device performs poorly in controlling the decay speed of impact force, which means that the die and equipment will still experience larger vibration and impact fluctuation in the stamping process, not only affecting the machining precision and the stability of product quality, but also further aggravating the wear of die and the aging of equipment.

[0008] Furthermore, in the die resetting stage after stamping, due to the lack of effective damping control, the die will often vibrate and impact sharply due to the rapid rebound of spring and other elastic elements, which not only may cause secondary damage to the die, but also will interfere with the normal operation rhythm of the entire press machine and reduce the production efficiency.

[0009] Therefore, we propose a sliding buffer device of press machine, which can realize efficient absorption and attenuation of impact force and precise control of die resetting process, and improve the service life of die. CONTENT OF THE UTILITY MODEL

[0010] The utility model provides a sliding buffer device of press, which can realize efficient absorption and attenuation of impact force and accurate control of die resetting process, and improve the service life of the die.

[0011] The technical scheme adopted by the utility model is as follows:

[0012] A sliding buffer device of press, comprising a workbench and a support arranged on the workbench, wherein the support is provided with a hydraulic assembly;

[0013] The workbench top is provided with two sliding grooves and four first buffer assemblies, four first buffer assemblies are arranged on the top of the workbench, and each sliding groove is internally provided with a rectangular hollow shell, the rectangular hollow shell is internally provided with a piston plate, a plurality of through holes are formed in one side of the rectangular hollow shell and communicated with the rectangular hollow shell, a plurality of sealing rods with different lengths are arranged on the side of the piston plate close to the through holes, a moving rod is arranged on the other side of the piston plate, the moving rod is arranged on the other side of the piston plate and penetrates out of the rectangular hollow shell and is provided with a connecting plate, the connecting plate is hingedly connected with a movable plate, and the movable plate is hingedly connected with the lower die at the end away from the connecting plate.

[0014] Further, the sealing rods are matched with the through holes.

[0015] Further, the piston plate is provided with a sealing layer.

[0016] Further, the first buffer assembly comprises a hollow cylinder arranged on the workbench, the hollow cylinder is internally provided with a first spring, the top of the first spring is provided with a piston disc, the top of the piston disc is provided with a connecting rod, the connecting rod penetrates out of the hollow cylinder and is connected with the lower die.

[0017] Further, the hydraulic assembly comprises a hydraulic cylinder arranged on the support, the hydraulic cylinder is provided with a mounting plate at the telescopic end, and the mounting plate is provided with a hydraulic head at the bottom.

[0018] Further, the workbench top is provided with two supporting rods, the supporting rods are provided with a second spring and a compression plate, the compression plate is provided with the second spring at the bottom, and the compression plate is connected with the mounting plate at one side.

[0019] The utility model achieves the following technical effects:

[0020] 1、When preparing to carry out the stamping work, the workpiece is placed on the lower die, then the hydraulic assembly starts to move downward, when the hydraulic assembly contacts with the workpiece on the lower die, strong impact force is generated, at this time, the lower die will be subjected to great downward pressure, the pressure is first transmitted to the first buffer assembly, a part of the impact force is absorbed through the first buffer assembly, thereby reducing the direct impact on the mold and other parts of the equipment, and protection is achieved.

[0021] 2、With the downward movement of the lower die, it will drive the movable plate to move together, the movable plate is connected with the moving rod, thereby pushing the moving rod, the moving rod is connected with the piston plate, so that the piston plate moves inside the rectangular hollow shell, a plurality of sealing rods with different lengths are arranged on one side of the piston plate in the rectangular hollow shell, and a plurality of through holes communicating with the inside are formed in one side of the rectangular hollow shell, when the piston plate starts to move, due to the different lengths of the sealing rods, the longest sealing rod will first approach and enter the inside of the corresponding through hole, when the longest sealing rod enters the through hole, it will greatly reduce the passage area of the gas exhaust from the through hole, because the gas exhaust passage is narrowed, the gas resistance in the rectangular hollow shell will rapidly rise, with the continuous movement of the piston plate, the sealing rods with the second longest length will also enter the corresponding through holes in turn, with the entry of more and more sealing rods into the through holes, the gas exhaust passage will be further reduced, which leads to the continuous rise of the gas resistance in the rectangular hollow shell, the continuously rising gas resistance will react on the movement of the piston plate, so that the movement speed of the piston plate and the lower die connected therewith gradually slows down, and the impact force also gradually decreases, finally the buffering effect is achieved, and the mold and the equipment are protected from the damage of excessive impact force in the stamping process.

[0022] 3、When the stamping is completed, the first buffer assembly will drive the lower die to move upward relying on the elastic recovery force or other rebound mechanism thereof, so as to restore to the initial position, in the process of upward movement of the lower die, the movable plate is driven, the movable plate pulls the moving rod, and the moving rod drives the piston plate to move in the rectangular hollow shell in the reverse direction, in the process of reverse movement, the shortest sealing rod will first remove from the corresponding through hole, because only this through hole is opened at this time, the sectional area of the gas entering the rectangular hollow shell is small, and the amount of the gas flowing in is small, the slow inflow of the small amount of gas will produce a damping effect, which hinders the rapid upward movement of the piston plate and the lower die, due to the existence of the damping, the lower die can stably rise, and vibration is not generated due to the excessive rebound speed, so that the impact and damage of the lower die in the upward process are avoided, and the effect of protecting the lower die is achieved, then the through holes are opened more and more, the damping effect disappears slowly, and the lower die also returns to the original position, so that the service life of the lower die is effectively protected. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the overall structure schematic view of the utility model.

[0024] Figure 2 is the side view of the utility model;

[0025] Figure 3 is the sectional view of the rectangular hollow shell of the utility model;

[0026] Figure 4 is the structural schematic view of the first buffer assembly.

[0027] In the drawings, the component list represented by each reference numeral is as follows:

[0028] 1, workbench; 2, support; 3, lower mould; 4, rectangular hollow shell; 5, piston plate; 6, through hole; 7, sealing rod; 8, moving rod; 9, connecting plate; 10, movable plate; 11, hollow cylinder; 12, first spring; 13, piston disc; 14, connecting rod; 15, hydraulic cylinder; 16, mounting plate; 17, hydraulic head; 18, support rod; 19, second spring; 20, compression plate. DETAILED DESCRIPTION

[0029] In order to make the purpose and advantages of the utility more clear and explicit, the utility is specifically described below in combination with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the utility, and does not strictly limit the protection scope specifically requested by the utility.

[0030] As Figures 1-4 indicated, the technical scheme adopted by the utility is specifically as follows: a sliding buffer device of a press machine, comprising a workbench 1 and a support 2 arranged on the workbench 1, and a hydraulic assembly arranged on the support 2.

[0031] The workbench 1 is provided with two sliding grooves and four first buffer assemblies on the top, the four first buffer assemblies are provided with a lower mould 3 on the top, each sliding groove is provided with a rectangular hollow shell 4 inside, the rectangular hollow shell 4 is provided with a piston plate 5 inside, a plurality of through holes 6 are formed in one side of the rectangular hollow shell 4 and communicated with the through holes 6, a plurality of sealing rods 7 of different lengths are arranged on the side of the piston plate 5 close to the through holes 6, a moving rod 8 is arranged on the other side of the piston plate 5, the moving rod 8 penetrates out of the rectangular hollow shell 4 on the side away from the piston plate 5 and is provided with a connecting plate 9, the connecting plate 9 is hingedly connected with a movable plate 10, and the end of the movable plate 10 away from the connecting plate 9 is hingedly connected with the lower mould 3.

[0032] When the workpiece is placed on the lower die 3, the hydraulic assembly starts to move downward. When the hydraulic assembly contacts the workpiece on the lower die 3, a strong impact force is generated, at this time, the lower die 3 will be subjected to a huge downward pressure, which is first transmitted to the first buffer assembly, absorbing part of the impact force, thereby reducing the direct impact on the mold and other parts of the equipment, playing a protective role. At the same time, as the lower die 3 moves downward, it will move the movable plate 10 together, the movable plate 10 is connected with the moving rod 8, thereby pushing the moving rod 8, the moving rod 8 is connected with the piston plate 5, so that the piston plate 5 moves inside the rectangular hollow shell 4. In the rectangular hollow shell 4, a plurality of sealing rods 7 of different lengths are arranged on one side of the piston plate 5, and a plurality of through holes 6 are opened on one side of the rectangular hollow shell 4 and are in communication with the inside. When the piston plate 5 starts to move, because the sealing rods 7 are of different lengths, the longest sealing rod 7 will first approach and enter the inside of the corresponding through hole 6. When the longest sealing rod 7 enters the through hole 6, it will greatly reduce the passage area of the gas discharged from the through hole 6. Because the gas discharge passage is narrowed, the gas resistance in the rectangular hollow shell 4 will rise rapidly. As the piston plate 5 continues to move, the sealing rods 7 of the next length will also enter the corresponding through holes 6 in turn. With each additional sealing rod 7 entering the through hole 6, the gas discharge passage will be further reduced, which causes the gas resistance in the rectangular hollow shell 4 to continue to rise. This constantly rising gas resistance will react on the movement of the piston plate 5, causing the movement speed of the piston plate 5 and the lower die 3 connected thereto to gradually slow down, and the impact force will also gradually decrease, finally achieving the effect of buffering, protecting the mold and equipment from excessive impact force during stamping. When the stamping is completed, the first buffer assembly will drive the lower die 3 to move upward relying on its own elastic restoring force or other rebound mechanism, so as to restore it to the initial position. In the process of moving the lower die 3 upward, the movable plate 10 will be moved, and the movable plate 10 will pull the moving rod 8, and the moving rod 8 will in turn drive the piston plate 5 to move in the opposite direction in the rectangular hollow shell 4. In this reverse movement process, the shortest sealing rod 7 will first be removed from the corresponding through hole 6. At this time, only this through hole 6 is open, the cross-sectional area of the gas entering the rectangular hollow shell 4 is small, and the amount of gas flowing in is small. The slow inflow of this small amount of gas will produce a damping effect, hindering the rapid upward movement of the piston plate 5 and the lower die 3. Due to the existence of damping, the lower die 3 can rise smoothly and will not vibrate due to the excessive rebound speed. In this way, the impact and damage that the lower die 3 may suffer during the upward movement are avoided, achieving the effect of protecting the lower die 3. Subsequently, more and more through holes 6 are opened, the damping effect slowly disappears, and the lower die 3 also returns to the original position, thereby effectively protecting the service life of the lower die 3. The device can realize efficient absorption and attenuation of the impact force, as well as precise control of the mold resetting process, improve the service life of the mold.

[0033] Wherein, the sealing rod 7 matches with the through hole 6, here the matching means that the sealing rod 7 can move inside the through hole 6, while preventing the gas leakage phenomenon from occurring.

[0034] At the same time, the piston plate 5 is provided with a sealing layer, which can prevent gas leakage when the piston plate 5 moves.

[0035] The first buffer assembly includes a hollow cylinder 11 arranged on the workbench 1, a first spring 12 arranged inside the hollow cylinder 11, a piston plate 13 arranged on the top of the first spring 12, a connecting rod 14 arranged on the top of the piston plate 13, and the connecting rod 14 penetrating through the hollow cylinder 11 and connected with the lower mold 3.

[0036] When the lower mold 3 is impacted, the lower mold 3 drives the connecting plate 9 to press the first spring 12 inside the hollow cylinder 11, and the elastic force of the first spring 12 offsets part of the impact force.

[0037] The hydraulic assembly includes a hydraulic cylinder 15 arranged on the support 2, a mounting plate 16 mounted on the telescopic end of the hydraulic cylinder 15, and a hydraulic head 17 arranged on the bottom of the mounting plate 16, and the hydraulic head 17 is driven by the mounting plate 16 to move downward to work.

[0038] The workbench 1 is provided with two supporting rods 18, a second spring 19 and a compression plate 20 are sleeved on the supporting rod 18, the second spring 19 is arranged on the bottom of the compression plate 20, and one side of the compression plate 20 is connected with the mounting plate 16.

[0039] When the mounting plate 16 moves downward to drive the compression plate 20 to move downward to press the second spring 19, the impact force is further reduced, thereby protecting the safety of the lower mold 3.

[0040] The working principle of the utility model is as follows: when preparing to carry out the stamping work, the workpiece is placed on the lower die 3. Then, the hydraulic assembly starts to move downward. When the hydraulic assembly contacts the workpiece on the lower die 3, a strong impact force is generated, at this time, the lower die 3 is subjected to a huge downward pressure, which is first transmitted to the first buffer assembly, absorbing part of the impact force, thereby reducing the direct impact on the mold and other parts of the equipment, playing a protective role. At the same time, with the downward movement of the lower die 3, it drives the movable plate 10 to move together, the movable plate 10 is connected with the moving rod 8, thereby pushing the moving rod 8, the moving rod 8 is connected with the piston plate 5, so that the piston plate 5 moves inside the rectangular hollow shell 4. In the rectangular hollow shell 4, a plurality of sealing rods 7 of different lengths are arranged on one side of the piston plate 5, and a plurality of through holes 6 are opened on one side of the rectangular hollow shell 4 and are in communication with the inside. When the piston plate 5 starts to move, because the sealing rods 7 are of different lengths, the longest sealing rod 7 will first approach and enter the inside of the corresponding through hole 6. When the longest sealing rod 7 enters the through hole 6, it greatly reduces the passage area of the gas discharged from the through hole 6. Because the gas discharge passage is narrowed, the gas resistance in the rectangular hollow shell 4 will rise rapidly. With the continuous movement of the piston plate 5, the sealing rods 7 of the next length will also enter the corresponding through holes 6 in turn. With each additional sealing rod 7 entering the through hole 6, the gas discharge passage will be further reduced, which causes the gas resistance in the rectangular hollow shell 4 to continue to rise. This continuously rising gas resistance will react on the movement of the piston plate 5, so that the movement speed of the piston plate 5 and the lower die 3 connected therewith gradually slows down, and the impact force also gradually decreases, finally achieving the buffering effect, protecting the mold and the equipment from excessive impact force during the stamping process. When the stamping is completed, the first buffer assembly will drive the lower die 3 to move upward by relying on its own elastic restoring force or other rebound mechanism, so as to restore it to the initial position. In the process of moving the lower die 3 upward, the movable plate 10 will be driven, and the movable plate 10 will pull the moving rod 8, and the moving rod 8 will in turn drive the piston plate 5 to move in the opposite direction in the rectangular hollow shell 4. In the process of moving in the opposite direction, the shortest sealing rod 7 will be removed from the corresponding through hole 6 first. At this time, only this through hole 6 is open, the cross-sectional area of the gas entering the rectangular hollow shell 4 is small, and the amount of gas flowing in is small. The slow inflow of a small amount of gas will produce a damping effect, hindering the rapid upward movement of the piston plate 5 and the lower die 3. Due to the existence of damping, the lower die 3 can rise smoothly and will not vibrate due to the excessive rebound speed. In this way, the impact and damage that the lower die 3 may suffer during the upward movement are avoided, achieving the effect of protecting the lower die 3. Subsequently, more and more through holes 6 are opened, the damping effect disappears slowly, and the lower die 3 also returns to the original position, thereby effectively protecting the service life of the lower die 3. The device can realize efficient absorption and attenuation of the impact force, as well as precise control of the mold resetting process, improve the service life of the mold.

[0041] The above merely describes the preferred embodiments of the present utility, it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present utility, can also make a number of improvements and refinements, these improvements and refinements should also be considered the protection scope of the present utility. The structure, device and operation method not specifically described and explained in the present utility, such as no special description and limitation, are implemented according to the conventional means in the art.

Claims

1. A sliding buffer device of a press machine, comprising a workbench (1) and a support (2) arranged on the workbench (1), and a hydraulic assembly arranged on the support (2). characterized in that The top of the workbench (1) is provided with two sliding grooves and four first buffer assemblies, the top of each of the four first buffer assemblies is provided with a lower die (3), the inside of each of the sliding grooves is provided with a rectangular hollow shell (4), the inside of the rectangular hollow shell (4) is provided with a piston plate (5), a plurality of through holes (6) are formed in one side of the rectangular hollow shell (4) and communicate with the rectangular hollow shell (4), a plurality of sealing rods (7) with different lengths are arranged on the side of the piston plate (5) close to the through holes (6), a moving rod (8) is arranged on the other side of the piston plate (5), the side of the moving rod (8) away from the piston plate (5) penetrates out of the rectangular hollow shell (4) and is provided with a connecting plate (9), the connecting plate (9) is hingedly connected with a movable plate (10), and the end of the movable plate (10) away from the connecting plate (9) is hingedly connected with the lower die (3).

2. A slide cushioning device for a press machine according to claim 1, characterized in that: The sealing rods (7) are matched with the through holes (6).

3. A slide cushioning device for a press machine according to claim 1, characterized in that: A sealing layer is arranged on the piston plate (5).

4. A slide cushioning device for a press machine according to claim 1, characterized in that: The first buffer assembly comprises a hollow cylinder (11) arranged on the workbench (1), the inside of the hollow cylinder (11) is provided with a first spring (12), the top of the first spring (12) is provided with a piston disc (13), the top of the piston disc (13) is provided with a connecting rod (14), the top of the connecting rod (14) penetrates out of the hollow cylinder (11) and is connected with the lower die (3).

5. A slide cushioning device for a press machine according to claim 1, wherein: The hydraulic assembly comprises a hydraulic cylinder (15) arranged on the support (2), the telescopic end of the hydraulic cylinder (15) is provided with a mounting plate (16), and the bottom of the mounting plate (16) is provided with a hydraulic head (17).

6. A slide cushioning device for a press machine according to claim 5, wherein: The top of the workbench (1) is provided with two supporting rods (18), the supporting rods (18) are sleeved with a second spring (19) and a compression plate (20), the bottom of the compression plate (20) is provided with the second spring (19), and one side of the compression plate (20) is connected with the mounting plate (16).

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