Multi-connecting-rod hydraulic press

Abstract

The invention discloses a multi-connecting-rod hydraulic press, relates to the technical field of hydraulic presses, and aims to solve the technical problem that when a metal workpiece is shaped, vibration is generated when a punch hammer and a workbench are closed, and the precision of a product is possibly insufficient in the punching or forming process. A buffer groove is formed in the top of the workbench, and a pressing plate is arranged in the buffer groove. By means of the buffering mechanism, when a metal workpiece is shaped, an initial buffering effect can be achieved on a workbench through a first spring and a telescopic rod, when a pressing plate is pressed downwards, a transmission disc moves downwards, an arc-shaped plate deforms to be in a bent shape, a rubber plate moves out of the arc-shaped plate and deforms to be in an arc shape, and through a thread and a limiting barrel, the pressing plate is pressed downwards. The rubber plate and the arc-shaped plate are rotated, at the moment, potential energy can be converted into torque, heat generated in the conversion process is discharged from a heat dissipation opening in the workbench through rotation of the rubber plate, and the reliability of the device can be improved easily.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic presses, and more specifically, to a multi-link hydraulic press. Background Art

[0002] A multi-link hydraulic press is an efficient forging equipment that combines the characteristics of mechanical presses and hydraulic presses. Through its unique multi-link transmission mechanism, the multi-link hydraulic press realizes slow approach and rapid return during the working process, improving production efficiency and reducing the impact on the mold.

[0003] Currently, when using a multi-link hydraulic press, the shaping of metal workpieces is carried out between the punch and the workbench, and pressure is applied to the workbench by the punch. During this process, when the punch and the workbench close, vibrations will occur, which easily causes the multi-link hydraulic press to shake, and may lead to insufficient precision of the product during stamping or forming. In view of this, a multi-link hydraulic press is needed. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-link hydraulic press to solve the technical problem that when shaping metal workpieces, vibrations will occur when the punch and the workbench close, which may lead to insufficient precision of the product during stamping or forming.

[0005] To solve the above technical problem, the present invention provides the following technical solution: A multi-link hydraulic press, including a workbench, a crossbeam fixedly connected to the top of the workbench, a buffer groove opened on the top of the workbench, a pressing plate arranged inside the buffer groove, and a buffer mechanism arranged inside the buffer groove; the buffer mechanism includes two fixing plates and a conversion unit, and the pressing plate is fixedly connected to the conversion unit; a limiting unit is arranged inside the crossbeam; a driving link unit is arranged inside the crossbeam; the bottom of the driving link unit is movably connected to a punch through a hinge; the two fixing plates are respectively fixedly connected to the opposite sides of the pressing plate and the buffer groove, a telescopic rod is fixedly connected to the opposite sides of the two fixing plates, a spring is movably sleeved on the outer wall of the telescopic rod and both ends of the spring are respectively fixedly connected to the opposite sides of the two fixing plates, a push plate is movably connected to the side surface of the fixing plate through a hinge, a threaded ring is fixedly connected to the opposite sides of the two push plates, a plurality of first threaded rods are movably connected to the inner walls of both sides of the buffer groove and the first threaded rods correspond to the positions of the push plates, and two spring two are movably sleeved on the outer wall of each first threaded rod and each spring two is respectively fixedly connected to one side of the first threaded rod.

[0006] Preferably, the conversion unit includes two drive disks which are respectively arranged on the opposite sides of the pressing plate and the buffer groove. One of the drive disks is fixedly connected to the bottom of the pressing plate, and the other drive disk is movably connected to the inner wall of the bottom of the buffer groove through a bearing. A limiting cylinder is fixedly connected to the bottom of one of the drive disks, and a second threaded rod is fixedly connected to the top of the other drive disk and the second threaded rod is movably sleeved inside the limiting cylinder. A drive ring is movably connected in the chute of one of the drive disks. A plurality of arc-shaped plates are fixedly connected to the opposite sides of the drive ring and the drive disk, and the arc-shaped plates are distributed in a circular array. A rubber plate is fixedly connected to one side of each arc-shaped plate, and a rubber ring is movably sleeved on the inner wall of the arc-shaped plate.

[0007] Preferably, a plurality of limiting grooves are formed on the side surface of the limiting cylinder and the limiting grooves are distributed in a circular array. A first limiting plate is movably connected to the top of the second threaded rod through a bearing, and a convex block on the first limiting plate is movably connected inside the first limiting plate. Through the buffer mechanism of the present invention, during the shaping of metal workpieces, through the first spring and the telescopic rod, an initial buffering effect can be exerted on the workbench. And when the pressing plate on the workbench is pressed down, the drive disk moves downward, causing the arc-shaped plate to deform into a bent shape. The rubber plate moves out of the arc-shaped plate and deforms into an arc shape. Through the thread and the limiting cylinder, the rubber plate and the arc-shaped plate rotate. At this time, the potential energy can be converted into torque, and the heat generated during the conversion is discharged from the heat dissipation openings on the workbench through the rotation of the rubber plate. The present invention can convert and consume the pressure exerted by the impact hammer on the workbench, avoiding the shaking generated during the use of the multi-link hydraulic press, resulting in insufficient accuracy of the product during stamping or forming, and is beneficial to improving the reliability of the device.

[0008] Preferably, the limiting unit includes a limiting frame which is fixedly connected inside the cross beam, and slide rails are respectively formed on both sides of the limiting frame.

[0009] Preferably, a lifting hole is formed on the top of the limiting frame, and second limiting plates are fixedly connected to the inner walls on both sides of the cross beam through bolts, and the impact hammer is slidably connected between the four second limiting plates.

[0010] Preferably, the driving link unit includes a hydraulic rod which is fixedly connected to the top of the cross beam, a transmission plate is fixedly connected to the output end of the hydraulic rod, and limiting rods are respectively movably connected to both sides of the cross beam through hinges.

[0011] Preferably, a first link is respectively movably connected to the opposite sides of the two limiting rods through hinges, and one end of the first link is jointly movably connected to the top of the pressing plate through a hinge.

[0012] Preferably, a second link is jointly movably connected between the limiting rod and the first link, one end of the second link is slidably connected to the inside of the slide rail through a plug rod, and the second limiting plate is movably connected to the opposite sides of the two second links through a plug rod.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] Through the buffer mechanism, during the shaping of metal workpieces, the first spring and the telescopic rod can provide an initial buffering effect on the workbench. When the pressing plate on the workbench presses down, the transmission disk moves downward, causing the arc-shaped plate to deform into a curved shape. The rubber plate moves out of the arc-shaped plate and deforms into an arc shape. Through the thread and the limiting cylinder, the rubber plate and the arc-shaped plate rotate. At this time, the potential energy can be converted into torque, and the heat generated during the conversion is discharged from the heat dissipation opening on the workbench through the rotation of the rubber plate. The present invention can convert and consume the pressure exerted by the impact hammer on the workbench, avoiding the shaking generated during the use of the multi-link hydraulic press, resulting in insufficient product accuracy during the stamping or forming process, and is beneficial to improving the reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 is an overall structural cross-sectional schematic diagram of the present invention;

[0017] Figure 3 is a three-dimensional enlarged structural schematic diagram of the conversion unit of the present invention;

[0018] Figure 4 is a three-dimensional cross-sectional structural schematic diagram of the conversion unit of the present invention;

[0019] Figure 5 is a schematic diagram of the use state structure of the conversion unit of the present invention;

[0020] Figure 6 is a cross-sectional schematic diagram of the use state structure of the conversion unit of the present invention;

[0021] Figure 7 is a three-dimensional enlarged structural schematic diagram of the buffer mechanism of the present invention.

[0022] Description of reference numerals in the figure: 1, workbench; 2, crossbeam; 3, buffer groove; 4, pressing plate; 5, buffer mechanism; 501, fixing plate; 502, telescopic rod; 503, first spring; 504, pushing plate; 505, threaded ring; 506, first threaded rod; 507, second spring; 6, conversion unit; 601, transmission disc; 602, limiting cylinder; 602a, limiting groove; 603, second threaded rod; 603a, first limiting plate; 604, transmission ring; 605, arc plate; 606, rubber plate; 607, rubber ring; 7, limiting unit; 701, limiting frame; 702, slide rail; 703, lifting hole; 704, second limiting plate; 8, driving link unit; 801, hydraulic rod; 802, transmission plate; 803, limiting rod; 804, first link; 805, second link; 9, impact hammer. Detailed implementation mode

[0023] As Figures 1 to 7 shown, a multi-link hydraulic press according to the present invention includes a workbench 1, a crossbeam 2 fixedly connected to the top of the workbench 1, a buffer groove 3 opened on the top of the workbench 1, a pressing plate 4 arranged inside the buffer groove 3, and a buffer mechanism 5 arranged inside the buffer groove 3; the buffer mechanism 5 includes two fixing plates 501 and a conversion unit 6, and the pressing plate 4 is fixedly connected to the conversion unit 6; a limiting unit 7 is arranged inside the crossbeam 2; a driving link unit 8 is arranged inside the crossbeam 2; the bottom of the driving link unit 8 is movably connected to an impact hammer 9 through a hinge; the two fixing plates 501 are respectively fixedly connected to the opposite sides of the pressing plate 4 and the buffer groove 3, a telescopic rod 502 is fixedly connected to the opposite sides of the two fixing plates 501, a first spring 503 is movably sleeved on the outer wall of the telescopic rod 502 and the two ends of the first spring 503 are respectively fixedly connected to the opposite sides of the two fixing plates 501, a pushing plate 504 is movably connected to the side surface of the fixing plate 501 through a hinge, a threaded ring 505 is fixedly connected to the opposite sides of the two pushing plates 504, a plurality of first threaded rods 506 are movably connected to the inner walls of the two sides of the buffer groove 3 and the first threaded rods 506 correspond to the positions of the pushing plates 504, two second springs 507 are movably sleeved on the outer walls of the first threaded rods 506 and each second spring 507 is respectively fixedly connected to one side of the first threaded rod 506. During this process, after the pressing plate 4 contacts the impact hammer 9, the entire press vibrates. Through the elastic characteristics of the first spring 503 itself, the impact force received by the pressing plate 4 can be buffered. The telescopic rod 502 is pressed down by the pressing plate 4, causing it to expand and contract downward. During the downward movement of the fixing plate 501 at the top of the first spring 503, the pushing plate 504 can be pushed through the hinged pushing plate 504 to move on the first threaded rod 506. During this process, by moving the threaded ring 505 on the first threaded rod 506, the first threaded rod 506 can be driven to rotate.

[0024] In the embodiment of the present invention, as Figure 3 、 Figure 4 Figure 5 andFigure 6 As shown, the conversion unit 6 includes two drive disks 601, which are respectively arranged on the opposite sides of the pressing plate 4 and the buffer groove 3. One of the drive disks 601 is fixedly connected to the bottom of the pressing plate 4, and the other drive disk 601 is movably connected to the inner wall of the bottom of the buffer groove 3 through a bearing. A limiting cylinder 602 is fixedly connected to the bottom of one of the drive disks 601, a second threaded rod 603 is fixedly connected to the top of the other drive disk 601, and the second threaded rod 603 is movably sleeved inside the limiting cylinder 602. A drive ring 604 is movably connected in the chute of one of the drive disks 601. A plurality of arc-shaped plates 605 are fixedly connected to the opposite sides of the drive ring 604 and the drive disk 601, and the arc-shaped plates 605 are distributed in an annular array. A rubber plate 606 is fixedly connected to one side of each arc-shaped plate 605. A rubber ring 607 is movably sleeved inside the inner wall of the arc-shaped plate 605. A plurality of limiting grooves 602a are formed on the side surface of the limiting cylinder 602 and are distributed in an annular array. A first limiting plate 603a is movably connected to the top of the second threaded rod 603 through a bearing, and the convex block on the first limiting plate 603a is movably connected inside the first limiting plate 603a. During the process of potential energy conversion, part of it is consumed and converted. At the same time, the resistance of the threaded ring 505 can be increased through the second spring 507. And during the downward pressing of the pressing plate 4, the drive disk 601 at the bottom of the pressing plate 4 presses downward, causing the arc-shaped plate 605 to deform. And the rubber plate 606 in the arc-shaped plate 605 turns outwards through the rubber ring 607. At the same time, through the downward movement of the drive disk 601, the second threaded rod 603 rotates inside the limiting cylinder 602, converting potential energy into torque. And through the rotation of the second threaded rod 603, the drive disk 601 and the drive ring 604 in the buffer groove 3 rotate synchronously, driving the arc-shaped plate 605 and the rubber plate 606 to rotate. During this process, through the rotation of the second threaded rod 603 inside the limiting cylinder 602, part of the energy is consumed during potential energy conversion. At the same time, the energy that is not converted drives the arc-shaped plate 605 and the rubber plate 606 to rotate, causing the heat generated during the process of potential energy conversion to be discharged from the buffer groove 3 through the rubber plate 606 and out of the heat dissipation port on the workbench 1.

[0025] In the embodiment of the present invention, as Figure 2As shown in the figure, the limiting unit 7 includes a limiting frame 701. The limiting frame 701 is fixedly connected inside the cross beam 2. Slide rails 702 are respectively provided on both sides of the limiting frame 701, and a lifting hole 703 is provided at the top of the limiting frame 701. Limiting plates two 704 are fixedly connected to the inner walls on both sides of the cross beam 2 by bolts, and the impact hammer 9 is slidably connected between the four limiting plates two 704. The driving link unit 8 includes a hydraulic rod 801. The hydraulic rod 801 is fixedly connected to the top of the cross beam 2. The output end of the hydraulic rod 801 is fixedly connected with a transmission plate 802. Limiting rods 803 are respectively movably connected to both sides of the cross beam 2 by hinges. Link one 804 is respectively movably connected to the opposite sides of the two limiting rods 803 by hinges, and one end of link one 804 is movably connected to the top of the pressing plate 4 by a hinge together. Link two 805 is movably connected between the limiting rod 803 and link one 804 by a hinge. One end of link two 805 is slidably connected to the inside of the slide rail 702 by an insertion rod. The limiting plate two 704 is movably connected to the opposite sides of the two link two 805s by an insertion rod. When in use, first place the workpiece on the pressing plate 4, and then make the hydraulic rod 801 work through an external hydraulic system, so that the transmission plate 802 moves downward in the lifting hole 703. While the transmission plate 802 moves, it pushes link two 805 to move, and through the adjustment of the limiting rod 803, link one 804 is made to push the pressing plate 4 to move. During the movement of the impact hammer 9, it can move stably through the limiting plate two 704. When the impact hammer 9 contacts the workpiece and the pressing plate 4 rolls the workpiece, the workpiece is shaped.

[0026] Working principle: When in use, first place the workpiece on the pressing plate 4, and then make the hydraulic rod 801 work through an external hydraulic system, so that the transmission plate 802 moves downward in the lifting hole 703. While the transmission plate 802 moves, it pushes the second connecting rod 805 to move, and through the adjustment of the limiting rod 803, the first connecting rod 804 pushes the pressing plate 4 to move. During the movement of the impact hammer 9, the limiting plate two 704 enables it to move stably. When the impact hammer 9 contacts the workpiece and presses the workpiece together with the pressing plate 4, the workpiece is shaped. During this process, after the pressing plate 4 contacts the impact hammer 9, the entire press vibrates. Through the elastic characteristics of the first spring 503 itself, the impact force received by the pressing plate 4 can be buffered. The telescopic rod 502 is pressed downward by the pressing plate 4, causing it to expand and contract downward. During the downward movement of the fixed plate 501 at the top of the first spring 503, through the articulated push plate 504, the push plate 504 can be pushed to move on the first threaded rod 506. During this process, through the movement of the threaded ring 505 on the first threaded rod 506, the first threaded rod 506 can be driven to rotate. During the process of potential energy conversion, part of it is consumed and converted. At the same time, the second spring 507 can increase the resistance of the threaded ring 505. And during the downward pressing of the pressing plate 4, the transmission disc 601 at the bottom of the pressing plate 4 presses downward, causing the arc-shaped plate 605 to deform, and the rubber plate 606 in the arc-shaped plate 605 turns outwards through the rubber ring 607. At the same time, through the downward movement of the transmission disc 601, the second threaded rod 603 rotates in the limiting cylinder 602, converting potential energy into torque. And through the rotation of the second threaded rod 603, the transmission disc 601 and the transmission ring 604 in the buffer groove 3 rotate synchronously, driving the arc-shaped plate 605 and the rubber plate 606 to rotate. During this process, through the rotation of the second threaded rod 603 in the limiting cylinder 602, during the potential energy conversion, part of the energy is consumed. At the same time, the energy that is not converted drives the arc-shaped plate 605 and the rubber plate 606 to rotate, so that the heat generated during the potential energy conversion is discharged from the buffer groove 3 through the rubber plate 606 from the heat dissipation port on the workbench 1.

[0027] The embodiments disclosed in this invention are the preferred embodiments, but not limited to this. Those of ordinary skill in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of this invention, they are within the protection scope of this invention.

Claims

1. A multi-link hydraulic press, characterized in that, It includes a workbench (1), a cross beam (2) is fixedly connected to the top of the workbench (1), a buffer groove (3) is opened on the top of the workbench (1), a pressing plate (4) is arranged inside the buffer groove (3), and a buffer mechanism (5) is arranged inside the buffer groove (3); The buffer mechanism (5) includes two fixing plates (501) and a conversion unit (6), and the pressing plate (4) is fixedly connected to the conversion unit (6); A limiting unit (7) is arranged inside the cross beam (2); A driving link unit (8) is arranged inside the cross beam (2); The bottom of the driving link unit (8) is movably connected to a punching hammer (9) through a hinge; The two fixing plates (501) are respectively fixedly connected to the opposite sides of the pressing plate (4) and the buffer groove (3). A telescopic rod (502) is fixedly connected to the opposite sides of the two fixing plates (501). A spring (503) is movably sleeved on the outer wall of the telescopic rod (502), and both ends of the spring (503) are respectively fixedly connected to the opposite sides of the two fixing plates (501). A push plate (504) is movably connected to the side surface of the fixing plate (501) through a hinge. A threaded ring (505) is fixedly connected to the opposite sides of the two push plates (504). A number of first threaded rods (506) are movably connected to the inner walls on both sides of the buffer groove (3), and the first threaded rods (506) correspond to the positions of the push plates (504). Two second springs (507) are movably sleeved on the outer wall of each first threaded rod (506), and each second spring (507) is respectively fixedly connected to one side of the first threaded rod (506).

2. The multi-link hydraulic press according to claim 1, wherein, The conversion unit (6) includes two transmission discs (601). The two transmission discs (601) are respectively arranged on the opposite sides of the pressing plate (4) and the buffer groove (3). One of the transmission discs (601) is fixedly connected to the bottom of the pressing plate (4), and the other transmission disc (601) is movably connected to the inner wall of the bottom of the buffer groove (3) through a bearing. A limiting cylinder (602) is fixedly connected to the bottom of one of the transmission discs (601). A second threaded rod (603) is fixedly connected to the top of the other transmission disc (601), and the second threaded rod (603) is movably sleeved inside the limiting cylinder (602). A transmission ring (604) is movably connected to the sliding groove of one of the transmission discs (601). A number of arc-shaped plates (605) are fixedly connected to the opposite sides of the transmission ring (604) and the transmission disc (601), and the arc-shaped plates (605) are distributed in a circular array. A rubber plate (606) is fixedly connected to one side of each arc-shaped plate (605). A rubber ring (607) is movably sleeved on the inner wall of the arc-shaped plate (605).

3. The multi-link hydraulic press according to claim 2, wherein A number of limiting grooves (602a) are opened on the side surface of the limiting cylinder (602), and the limiting grooves (602a) are distributed in a circular array. A first limiting plate (603a) is movably connected to the top of the second threaded rod (603) through a bearing, and the convex block on the first limiting plate (603a) is movably connected inside the first limiting plate (603a).

4. The multi-link hydraulic press according to claim 3, characterized in that, The limiting unit (7) for limiting includes a limiting frame (701), the limiting frame (701) is fixedly connected inside the cross beam (2), and slide rails (702) are respectively arranged on both sides of the limiting frame (701).

5. A multi-link hydraulic press according to claim 4, characterized in that, A lifting hole (703) is arranged at the top of the limiting frame (701), limiting plates II (704) are fixedly connected to the inner walls on both sides of the cross beam (2) through bolts, and the impact hammer (9) is slidably connected between the four limiting plates II (704).

6. The multi-link hydraulic press according to claim 5, wherein, The driving link unit (8) includes a hydraulic rod (801), the hydraulic rod (801) is fixedly connected to the top of the cross beam (2), a transmission plate (802) is fixedly connected to the output end of the hydraulic rod (801), and limiting rods (803) are respectively movably connected to both sides of the cross beam (2) through hinges.

7. A multi-link hydraulic press according to claim 6, characterized in that, Link rods I (804) are respectively movably connected to the opposite sides of the two limiting rods (803) through hinges, and one ends of the link rods I (804) are jointly movably connected to the top of the connecting impact hammer (9) through hinges.

8. A multi-link hydraulic press according to claim 7, characterized in that, A link rod II (805) is jointly movably connected between the limiting rod (803) and the link rod I (804), one end of the link rod II (805) is slidably connected to the inside of the slide rail (702) through an insertion rod, and the limiting plate II (704) is movably connected to the opposite sides of the two link rods II (805) through an insertion rod.

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