CN114179425A - Movable beam leveling structure and hydraulic press - Google Patents
Movable beam leveling structure and hydraulic press Download PDFInfo
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- CN114179425A CN114179425A CN202111489613.2A CN202111489613A CN114179425A CN 114179425 A CN114179425 A CN 114179425A CN 202111489613 A CN202111489613 A CN 202111489613A CN 114179425 A CN114179425 A CN 114179425A
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- 238000006073 displacement reaction Methods 0.000 claims description 18
- 238000003825 pressing Methods 0.000 claims description 16
- 210000004907 gland Anatomy 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 9
- 230000004044 response Effects 0.000 abstract description 7
- 230000035945 sensitivity Effects 0.000 abstract description 7
- 239000000428 dust Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000005242 forging Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/007—Means for maintaining the press table, the press platen or the press ram against tilting or deflection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/24—Control arrangements for fluid-driven presses controlling the movement of a plurality of actuating members to maintain parallel movement of the platen or press beam
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Abstract
The invention provides a movable beam leveling structure and a hydraulic machine, wherein the movable beam leveling structure comprises a leveling cylinder group and a return cylinder group, the leveling cylinder group is suitable for being arranged at the upper end of a movable cross beam of the hydraulic machine, the return cylinder group is suitable for being arranged at the lower end of the movable cross beam, the leveling cylinder group comprises a first leveling cylinder, a second leveling cylinder, a third leveling cylinder and a fourth leveling cylinder which are vertically arranged and distributed in an array manner, the first leveling cylinder and the third leveling cylinder are arranged in a diagonal manner, and the second leveling cylinder and the fourth leveling cylinder are arranged in a diagonal manner; the return cylinder group comprises a first return cylinder, a second return cylinder, a third return cylinder and a fourth return cylinder, and the first return cylinder, the second return cylinder, the third return cylinder and the fourth return cylinder are respectively and coaxially arranged with the first leveling cylinder, the second leveling cylinder, the third leveling cylinder and the fourth leveling cylinder. According to the invention, the movable beam is leveled by matching the leveling cylinder group and the return cylinder group, so that the hysteresis of the movable beam leveling structure can be effectively reduced, and the movable beam leveling structure is ensured to have extremely high control precision and response sensitivity.
Description
Technical Field
The invention relates to the technical field of mechanical devices, in particular to a movable beam leveling structure and a hydraulic machine.
Background
At present, four piston type leveling cylinders are generally adopted in a movable beam leveling structure of a hydraulic machine, the four piston type leveling cylinders are respectively arranged at four corners of a movable cross beam, two piston type leveling cylinders at two opposite corners are in a group, an upper cavity of one hydraulic cylinder in each group is connected with a lower cavity of the other cylinder at the opposite corner, and a closed oil path system is formed and used for leveling the movable cross beam. However, due to the pipeline pressure loss and liquid leakage of the piston type leveling cylinder, the movable beam leveling structure has the defects of hysteresis, low control precision, low response sensitivity and the like in the leveling of the movable beam, and the leveling performance is not ideal.
Disclosure of Invention
The invention solves the problems that: how to reduce the hysteresis quality when the movable beam leveling structure levels the movable beam and improve the control precision and the response sensitivity when the movable beam leveling structure levels the movable beam.
In order to solve the problems, the invention provides a movable beam leveling structure which comprises a leveling cylinder group and a return cylinder group, wherein the leveling cylinder group is suitable for being arranged at the upper end of a movable cross beam of a hydraulic machine, the return cylinder group is suitable for being arranged at the lower end of the movable cross beam, the leveling cylinder group comprises a first leveling cylinder, a second leveling cylinder, a third leveling cylinder and a fourth leveling cylinder which are vertically arranged and distributed in an array manner, the first leveling cylinder and the third leveling cylinder are arranged in a diagonal manner, and the second leveling cylinder and the fourth leveling cylinder are arranged in a diagonal manner; the return cylinder group comprises a first return cylinder, a second return cylinder, a third return cylinder and a fourth return cylinder, and the first return cylinder, the second return cylinder, the third return cylinder and the fourth return cylinder are coaxially arranged with the first leveling cylinder, the second leveling cylinder, the third leveling cylinder and the fourth leveling cylinder respectively.
Optionally, the first return cylinder, the second return cylinder, the third return cylinder, the fourth return cylinder, the first leveling cylinder, the second leveling cylinder, the third leveling cylinder, and the fourth leveling cylinder are plunger cylinders, the cylinder bodies and plungers of the first return cylinder, the second return cylinder, the third return cylinder, and the fourth return cylinder are respectively connected to the lower beam of the hydraulic machine and the movable beam, and the cylinder bodies and plungers of the first leveling cylinder, the second leveling cylinder, the third leveling cylinder, and the fourth leveling cylinder are respectively connected to the upper beam of the hydraulic machine and the movable beam.
Optionally, pipelines of oil chambers of the first return cylinder, the second return cylinder, the third return cylinder and the fourth return cylinder are respectively communicated with pipelines of oil chambers of the third leveling cylinder, the fourth leveling cylinder, the first leveling cylinder and the second leveling cylinder.
Optionally, the movable beam leveling structure further comprises a displacement sensor suitable for being arranged on the movable beam, and the displacement sensors are respectively arranged corresponding to the first leveling cylinder, the second leveling cylinder, the third leveling cylinder and the fourth leveling cylinder.
Optionally, the movable cross beam comprises a main beam, and a first guide beam and a second guide beam which are arranged at two ends of the main beam, wherein the first guide beam is suitable for being connected with plungers of the first leveling cylinder, the second leveling cylinder, the first return cylinder and the second return cylinder; the second guide beam is adapted to be connected with plungers of the third leveling cylinder, the fourth leveling cylinder, the third return cylinder, and the fourth return cylinder.
Optionally, the walking beam leveling structure further comprises a spherical hinge connecting structure, the first leveling cylinder, the second leveling cylinder, the first return cylinder and the plunger of the second return cylinder are connected with the first guide beam through the spherical hinge connecting structure, and the third leveling cylinder, the fourth leveling cylinder, the third return cylinder and the plunger of the fourth return cylinder are connected with the second guide beam through the spherical hinge connecting structure.
Optionally, the spherical hinge connection structure includes a spherical pad and a gland, the first guide beam and the second guide beam are both provided with mounting holes, the spherical pad is suitable for being arranged in the mounting hole, and the gland is suitable for being matched with the mounting hole in an inserting manner; the plunger piston of the first leveling cylinder, the second leveling cylinder, the third leveling cylinder, the fourth leveling cylinder, the first return cylinder, the second return cylinder, the third return cylinder and the fourth return cylinder is respectively in sliding connection with the corresponding ball pad and is limited by the gland.
Optionally, a first seam allowance structure is arranged at a connection position of the leveling cylinder group and the upper cross beam, and the leveling cylinder group and the upper cross beam are suitable for being matched with each other at the first seam allowance structure in an inserting manner; and/or a second seam allowance structure is arranged at the joint of the return cylinder group and the lower cross beam, and the return cylinder group and the lower cross beam are suitable for being matched with each other at the second seam allowance structure in an inserting mode.
Optionally, a sealing structure is arranged between the lower ends of the cylinder bodies of the plunger cylinders of the leveling cylinder group and the return cylinder group and the plungers.
In order to solve the problems, the invention also provides a hydraulic machine which comprises the movable beam leveling structure.
Compared with the prior art, the invention has the following beneficial effects: the movable beam leveling structure of the hydraulic machine is provided with the leveling cylinder group and the return cylinder group, and on one hand, the movable beam leveling structure is used for leveling the movable beam, so that the parallel precision of four corners of the movable beam is ensured, and the normal and stable operation of the hydraulic machine is ensured; on the other hand, the leveling cylinder group is also suitable for assisting the main hydraulic cylinder to push the movable cross beam downwards so as to lift the upper limit of the pressure of the hydraulic machine on the workpiece, and the return cylinder group also plays a role in balancing the weight of the movable cross beam and driving the movable cross beam to return. And the movable cross beam is leveled by matching the leveling cylinder group and the return cylinder group, so that the corresponding leveling cylinder and the return cylinder can simultaneously act on the movable cross beam, the hysteresis of the movable beam leveling structure when the movable cross beam is leveled can be effectively reduced, and the movable beam leveling structure is ensured to have extremely high control precision and response sensitivity. The first return cylinder, the second return cylinder, the third return cylinder and the fourth return cylinder of the return cylinder group are respectively in one-to-one correspondence and coaxial arrangement with the first leveling cylinder, the second leveling cylinder, the third leveling cylinder and the fourth leveling cylinder of the leveling cylinder group, so that the movable beam is easy to overcome unbalance loading moment in the die forging operation process through the movable beam leveling structure, and the parallel accuracy of four corners of the movable beam and the stability in the operation process are further ensured.
Drawings
FIG. 1 is a schematic view of a part of the structure of a hydraulic machine in the embodiment of the invention;
FIG. 2 is a schematic view of a portion of a movable cross member according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of the connection of the plunger, the movable beam and the spherical hinge connection structure in the embodiment of the present invention;
FIG. 4 is a schematic structural view of the connection of the plunger, the movable cross member and the spherical hinge connection structure according to another embodiment of the present invention;
FIG. 5 is a schematic structural diagram of the connection between the plunger cylinder and the spherical hinge connection structure according to the embodiment of the present invention;
fig. 6 is a partially enlarged view of a portion a in fig. 5.
Description of reference numerals:
1-leveling cylinder group, 11-first leveling cylinder, 12-second leveling cylinder, 13-third leveling cylinder and 14-fourth leveling cylinder; 2-a return cylinder group, 21-a first return cylinder, 22-a second return cylinder, 23-a third return cylinder and 24-a fourth return cylinder; 3-upper beam; 4-movable cross beam, 41-main beam, 42-first guide beam, 43-second guide beam and 44-mounting hole; 5-a lower cross beam; 6-spherical hinge connection structure, 61-spherical pad, 62-gland and 63-dustproof structure; 7-sealing structure, 71-guide sleeve, 72-V group sealing, 73-pressing sleeve, 74-adjusting gasket group, 75-flange, 76-dust ring and 77-dust ring pressing cover.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the coordinate system XYZ provided herein, the X axis represents forward, the X axis represents backward, the Y axis represents forward, the Y axis represents rightward, the Z axis represents forward, and the Z axis represents backward. Also, it is noted that the terms "first," "second," and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a movable beam leveling structure, including a leveling cylinder group 1 suitable for being disposed at an upper end of a movable beam 4 of a hydraulic machine and a return cylinder group 2 suitable for being disposed at a lower end of the movable beam 4, where the leveling cylinder group 1 includes a first leveling cylinder 11, a second leveling cylinder 12, a third leveling cylinder 13, and a fourth leveling cylinder 14 that are vertically disposed and distributed in an array, and the first leveling cylinder 11 and the third leveling cylinder 13 are disposed diagonally, and the second leveling cylinder 12 and the fourth leveling cylinder 14 are disposed diagonally; the return cylinder group 2 comprises a first return cylinder 21, a second return cylinder 22, a third return cylinder 23 and a fourth return cylinder 24, and the first return cylinder 21, the second return cylinder 22, the third return cylinder 23 and the fourth return cylinder 24 are respectively arranged coaxially with the first leveling cylinder 11, the second leveling cylinder 12, the third leveling cylinder 13 and the fourth leveling cylinder 14.
The movable beam leveling structure in the embodiment is suitable for a hydraulic machine, and is used for leveling the movable beam 4 when the movable beam 4 is in inclined unbalance during the pressurizing operation of the hydraulic machine, so that the normal and stable operation of the hydraulic machine is ensured. An upper cross beam 3, a movable cross beam 4 and a lower cross beam 5 of the hydraulic machine are sequentially arranged along the Z-axis direction in the figure 1, a leveling cylinder group 1 of a movable beam leveling structure is arranged between the upper cross beam 3 and the movable cross beam 4 and is connected with the upper end of the movable cross beam 4 (namely, the movable cross beam 4 is positioned at the end of the Z-axis direction in the figure 1), and a return cylinder group 2 is arranged between the lower cross beam 5 and the movable cross beam 4 and is connected with the lower end of the movable cross beam 4 (namely, the movable cross beam 4 is positioned at the end of the Z-axis direction in the figure 1). Therefore, the leveling cylinder group 1 and the return cylinder group 2 play a role in leveling the movable cross beam 4, and the leveling cylinder group 1 is also suitable for assisting the main hydraulic cylinder to push the movable cross beam 4 downwards so as to improve the upper limit of the pressure of the hydraulic machine on the workpiece; the return cylinder group 2 also plays a role in balancing the weight of the movable cross beam 4 and driving the movable cross beam 4 to return (i.e. driving the movable cross beam 4 to move upwards). The leveling cylinder group 1 comprises a first leveling cylinder 11, a second leveling cylinder 12, a third leveling cylinder 13 and a fourth leveling cylinder 14, wherein the first leveling cylinder 11, the second leveling cylinder 12, the third leveling cylinder 13 and the fourth leveling cylinder 14 are all vertically arranged (namely arranged along the Z-axis direction in the figure 1) and are distributed between the upper cross beam 3 and the movable cross beam 4 in an array manner; the first return cylinder 21, the second return cylinder 22, the third return cylinder 23 and the fourth return cylinder 24 of the return cylinder group 2 are respectively in one-to-one correspondence with the first leveling cylinder 11, the second leveling cylinder 12, the third leveling cylinder 13 and the fourth leveling cylinder 14 and are coaxially arranged, so that the movable cross beam 4 can easily overcome the unbalance loading moment in the die forging operation process through a movable beam leveling structure, and the parallel precision of four corners of the movable cross beam 4 is ensured. Moreover, the first leveling cylinder 11 and the first return cylinder 21, the second leveling cylinder 12 and the second return cylinder 22, the third leveling cylinder 13 and the third return cylinder 23, and the fourth leveling cylinder 14 and the fourth return cylinder 24 correspond to four corners of the movable beam 4 having a similar rectangular structure, respectively, that is, the first leveling cylinder 11 (the first return cylinder 21) and the third leveling cylinder 13 (the third return cylinder 23) are diagonally arranged, and the second leveling cylinder 12 (the second return cylinder 22) and the fourth leveling cylinder 14 (the fourth return cylinder 24) are diagonally arranged; wherein diagonally disposed means disposed at both ends of one diagonal of the movable cross member 4, respectively. Therefore, the movable cross beam 4 can be effectively leveled through the leveling cylinder group 1 and the return cylinder group 2 when the inclination is unbalanced, so that the parallel precision of four corners of the movable cross beam 4 is ensured, and the normal and stable operation of the hydraulic press is ensured.
By arranging the leveling cylinder group 1 and the return cylinder group 2, on one hand, the leveling cylinder group is used for leveling the movable cross beam 4, so that the parallel precision of four corners of the movable cross beam 4 is ensured, the movable cross beam 4 can be horizontally arranged (namely arranged in parallel to an XY plane in figure 1), and the normal and stable operation of the hydraulic press is ensured; on the other hand, the leveling cylinder group 1 is also suitable for assisting the main hydraulic cylinder to push the movable beam 4 downwards so as to raise the upper limit of the pressure of the hydraulic machine on the workpiece, and the return cylinder group 2 also plays a role in balancing the weight of the movable beam 4 and driving the movable beam 4 to return. And the movable cross beam 4 is leveled by matching the leveling cylinder group 1 and the return cylinder group 2, so that the corresponding leveling cylinder and the return cylinder can simultaneously act on the movable cross beam 4, the hysteresis of the movable beam leveling structure when the movable cross beam 4 is leveled can be effectively reduced, and the movable beam leveling structure is ensured to have extremely high control precision and response sensitivity. The first return cylinder 21, the second return cylinder 22, the third return cylinder 23 and the fourth return cylinder 24 of the return cylinder group 2 are respectively in one-to-one correspondence and coaxial arrangement with the first leveling cylinder 11, the second leveling cylinder 12, the third leveling cylinder 13 and the fourth leveling cylinder 14 of the leveling cylinder group 1, so that the movable beam 4 can easily overcome the unbalance loading moment in the die forging operation process through a movable beam leveling structure, and the parallel accuracy of four corners of the movable beam 4 and the stability in the operation process are further ensured.
Alternatively, as shown in fig. 1 to 5, the first return cylinder 21, the second return cylinder 22, the third return cylinder 23, the fourth return cylinder 24, the first leveling cylinder 11, the second leveling cylinder 12, the third leveling cylinder 13 and the fourth leveling cylinder 14 are plunger cylinders, the cylinders and plungers of the first return cylinder 21, the second return cylinder 22, the third return cylinder 23 and the fourth return cylinder 24 are respectively connected with the lower beam 5 and the movable beam 4 of the hydraulic machine, and the cylinders and plungers of the first leveling cylinder 11, the second leveling cylinder 12, the third leveling cylinder 13 and the fourth leveling cylinder 14 are respectively connected with the upper beam 3 and the movable beam 4 of the hydraulic machine.
In this embodiment, the leveling cylinder group 1 and the return cylinder group 2 both adopt plunger cylinders, so as to reduce the difficulty of structural design, manufacturing and sealing of the leveling cylinder group 1 and the return cylinder group 2, and improve the convenience of the later maintenance of the leveling cylinder group 1 and the return cylinder group 2. And the first return cylinder 21, the second return cylinder 22, the third return cylinder 23, the fourth return cylinder 24, the first leveling cylinder 11, the second leveling cylinder 12, the third leveling cylinder 13 and the fourth leveling cylinder 14 are all connected with the movable cross beam 4 through plungers, so that the leveling cylinder group 1 pushes the movable cross beam 4 downwards, and the return cylinder group 2 pushes the movable cross beam 4 upwards.
Alternatively, the pipelines of the oil chambers of the first return cylinder 21, the second return cylinder 22, the third return cylinder 23, and the fourth return cylinder 24 are respectively communicated with the pipelines of the oil chambers of the third leveling cylinder 13, the fourth leveling cylinder 14, the first leveling cylinder 11, and the second leveling cylinder 12.
In the present embodiment, the oil chambers of the first return cylinder 21 and the third leveling cylinder 13 are communicated through a pipeline, the oil chambers of the third return cylinder 23 and the first leveling cylinder 11 are communicated through a pipeline, the oil chambers of the second return cylinder 22 and the fourth leveling cylinder 14 are communicated through a pipeline, and the oil chambers of the fourth return cylinder 24 and the second leveling cylinder 12 are communicated through a pipeline (not shown in the figure); so that the first return cylinder 21 and the third leveling cylinder 13, the third return cylinder 23 and the first leveling cylinder 11, the second return cylinder 22 and the fourth leveling cylinder 14, or the fourth return cylinder 24 and the second leveling cylinder 12 are adapted to push the movable beam 4 at the same time; for example, when the first return cylinder 21 pushes up a corner of the movable beam 4, the third leveling cylinder 13 simultaneously pushes down an oblique corner of the movable beam 4. In this way, the movable cross beam 4 is quickly and efficiently leveled.
Optionally, the movable beam leveling structure further includes a displacement sensor (not shown in the figure) adapted to be disposed on the movable cross beam 4, and the plurality of displacement sensors are disposed corresponding to the first leveling cylinder 11, the second leveling cylinder 12, the third leveling cylinder 13, and the fourth leveling cylinder 14, respectively.
The first leveling cylinder 11, the second leveling cylinder 12, the third leveling cylinder 13 and the fourth leveling cylinder 14 are connected with four corners at four corners of the movable cross beam 4, and high-precision displacement sensors are also arranged at the four corners so as to judge the balance state of the movable cross beam 4 by accurately detecting the displacement data change of the four corners of the movable cross beam 4 in real time; when the displacement sensor detects that the movable cross beam 4 inclines, the movable cross beam 4 is leveled by controlling oil inlet and oil discharge of the corresponding leveling cylinder and the return cylinder. That is, when the displacement sensor detects that the movable cross member 4 rotates in one direction, the movable cross member leveling structure drives the movable cross member 4 to rotate in the opposite direction to eliminate the inclination of the movable cross member 4, so that the movable cross member 4 is kept horizontal. Wherein, displacement sensor detects movable beam 4's balanced/tilt state, the accessible sets up a plurality of displacement sensor in movable beam 4 four corners department and detects the displacement difference in movable beam 4 four corners and realize, be located the precision range that allows with the displacement difference that guarantees movable beam 4 four corners, thereby guarantee after the displacement difference in movable beam 4 four corners surpasses the precision range that allows, movable beam leveling structure can in time carry out the leveling to movable beam 4, with the parallel precision of assurance movable beam 4 four corners and the steady during operation. Through the arrangement of the displacement sensor, the movable beam leveling structure can level the movable cross beam 4 in time, the hysteresis of the movable beam leveling structure in leveling the movable cross beam is reduced, and the movable beam leveling structure has extremely high control precision and response sensitivity.
For the sake of understanding, the following description will be made by taking an example of the matching between the leveling cylinder group 1 and the return cylinder group 2, when one corner of the movable cross beam 4 connected with the first leveling cylinder 11 is higher than one corner of the movable cross beam 4 connected with the third leveling cylinder 13, the movable cross beam 4 is pushed downwards by the first leveling cylinder 11, and the movable cross beam 4 is simultaneously pushed upwards by the third return cylinder 23 to level the movable cross beam 4, during which the oil chambers of the first leveling cylinder 11 and the third return cylinder 23 are filled with oil; to improve the leveling efficiency, the oil chambers of the first return cylinder 21 and the third return cylinder 13 should be simultaneously drained to form an inverse balance couple in cooperation with the first leveling cylinder 11 and the third return cylinder 23.
Alternatively, as shown in fig. 1 and 2, the movable cross beam 4 includes a main beam 41 and a first guide beam 42 and a second guide beam 43 disposed at both ends of the main beam 41, the first guide beam 42 being adapted to be connected to the plungers of the first leveling cylinder 11, the second leveling cylinder 12, the first return cylinder 21, and the second return cylinder 22; the second guide beam 43 is adapted to be connected with the rams of the third leveling cylinder 13, the fourth leveling cylinder 14, the third return cylinder 23 and the fourth return cylinder 24.
In this embodiment, the first guide beam 42 and the second guide beam 43 are disposed at two ends of the main beam 41, the main beam 41 is used for disposing a main hydraulic cylinder, and the first guide beam 42 and the second guide beam 43 are used for disposing a movable beam leveling structure and a guide device connected to the hydraulic cylinder. The first leveling cylinder 11, the second leveling cylinder 12, the first return cylinder 21 and the second return cylinder 22 are connected with a first guide beam 42, and the third leveling cylinder 13, the fourth leveling cylinder 14, the third return cylinder 23 and the fourth return cylinder 24 are connected with a second guide beam 43; and a certain distance is reserved between the leveling cylinders (return cylinders).
Optionally, as shown in fig. 1, 3-5, the moving beam leveling structure further includes a spherical hinge connection structure 6, the plungers of the first leveling cylinder 11, the second leveling cylinder 12, the first return cylinder 21, and the second return cylinder 22 are connected to the first guide beam 42 through the spherical hinge connection structure 6, and the plungers of the third leveling cylinder 13, the fourth leveling cylinder 14, the third return cylinder 23, and the fourth return cylinder 24 are connected to the second guide beam 43 through the spherical hinge connection structure 6.
In this embodiment, each leveling cylinder (return cylinder) is connected to the corresponding guide beam through the spherical hinge connection structure 6, so as to improve the capability of each leveling cylinder (return cylinder) to respond to the lateral force when the movable beam 4 tilts, prevent the plunger and other structures of each leveling cylinder (return cylinder) from bearing the lateral force, ensure the stable connection between each leveling cylinder (return cylinder) and the movable beam 4, and ensure the stability and reliability of the operation of the movable beam leveling structure.
Alternatively, as shown in fig. 1 to 5, the ball hinge connecting structure 6 includes a ball pad 61 and a pressing cover 62, the first guide beam 42 and the second guide beam 43 are both provided with mounting holes 44, the ball pad 61 is adapted to be disposed in the mounting hole 44, and the pressing cover 62 is adapted to be inserted into the mounting hole 44; plungers of the first leveling cylinder 11, the second leveling cylinder 12, the third leveling cylinder 13, the fourth leveling cylinder 14, the first return cylinder 21, the second return cylinder 22, the third return cylinder 23 and the fourth return cylinder 24 are respectively in sliding connection with corresponding ball pads 61 and are limited through a gland 62.
In this embodiment, the first guide beam 42 and the second guide beam 43 are provided with mounting holes 44 corresponding to the leveling cylinders (return cylinders), the mounting holes 44 are blind holes, and the ball pads 61 of the ball hinge connecting structure 6 are embedded in the mounting holes 44. One end of the plunger of each leveling cylinder (return cylinder) facing the movable cross beam 4 is in spherical contact with the corresponding ball pad 61 to form sliding connection, so that the contact area between the plunger of each leveling cylinder (return cylinder) and the corresponding ball pad 61 is increased, and the leveling cylinders (return cylinders) can still be stably connected with the movable cross beam 4 when the movable cross beam 4 inclines. The pressing cover 62 is in plug fit with the mounting hole 44 and is detachably connected with the first guide beam 42 (or the second guide beam 43) through a fastener (such as a screw and the like); the pressing cover 62 is an annular structure and is disposed around a connection between the plunger of the leveling cylinder (return cylinder) and the ball pad 61 to limit displacement of the plunger of the leveling cylinder (return cylinder) in the horizontal direction (i.e., in a direction parallel to the XY plane in fig. 1), so as to prevent the plunger of each leveling cylinder (return cylinder) and other structures from bearing lateral force and ensure stable connection between the leveling cylinder (return cylinder) and the movable beam 4. Moreover, the position of each leveling cylinder (return cylinder) corresponding to the gland 62 is provided with an annular groove, and the gland 62 is suitable for being in plug-in fit with the annular groove so as to limit the displacement of the plunger of each leveling cylinder (return cylinder) relative to the movable cross beam 4 in the vertical direction, thereby further ensuring the stable connection of the leveling cylinder (return cylinder) and the movable cross beam 4. In addition, the pressing cover 62 is disposed against (or has a certain gap with) the hole wall and the hole bottom of the corresponding mounting hole 44, and the hole wall and the hole bottom of the mounting hole 44 form a spigot structure to limit the movement of the pressing cover 62 in the horizontal direction, so as to improve the stability when the pressing cover 62 is connected with the first guide beam 42 (or the second guide beam 43). A certain gap is formed between one end of each leveling cylinder (return cylinder) plunger, which is used for connecting the ball pad 61, and the gland 62 in the horizontal direction, so that the relative position of the plunger of each leveling cylinder (return cylinder) and the ball pad 61 can be adjusted to a certain degree, the capability of each leveling cylinder (return cylinder) for dealing with lateral force when the movable cross beam 4 inclines is improved, the situation that the lateral force is borne by the plunger of each leveling cylinder (return cylinder) and other structures is avoided, the stable connection between each leveling cylinder (return cylinder) and the movable cross beam 4 is ensured, and the stability and the reliability of the operation of the movable beam leveling structure are ensured.
In some embodiments, the ball pad 61 is connected to the movable cross member 4 within the mounting hole 44 by a fastener. As shown in fig. 4, the ball-and-socket joint structure 6 further includes a dustproof structure 63 (similar to a dust ring 76, a dust ring gland 77, and the like described later), and the dustproof structure 63 is adapted to be disposed at a joint of the gland 62 and the plunger of the leveling cylinder (return cylinder) for preventing dust.
Optionally, a first seam allowance structure is arranged at the joint of the leveling cylinder group 1 and the upper cross beam 3, and the leveling cylinder group 1 and the upper cross beam 3 are suitable for being matched with each other at the first seam allowance structure in an inserting manner; and/or a second spigot structure is arranged at the joint of the return cylinder group 2 and the lower cross beam 5, and the return cylinder group 2 and the lower cross beam 5 are suitable for being matched with each other at the second spigot structure in an inserting manner.
In the embodiment, the leveling cylinder group 1 and the upper cross beam 3 are positioned through a first seam allowance structure and are combined with the upper cross beam 3 through a plurality of fasteners (such as screws, bolts and the like); the return cylinder group 2 is positioned with the lower beam 5 by a second spigot structure and is held together with the lower beam 5 by a plurality of fasteners (e.g., screws, bolts, etc.). For convenience of description, a first rabbet structure arranged between the first leveling cylinder 11 and the upper cross beam 3 is taken as an example, the first rabbet structure is a groove structure and is arranged on the upper cross beam 3 (the cylinder body of the first leveling cylinder 11), and the cylinder body of the first leveling cylinder 11 (the upper cross beam 3) is provided with an insertion part which is suitable for being inserted and matched with the groove structure; the positioning of the cylinder body of the first leveling cylinder 11 on the upper cross beam 3 is realized through the insertion matching of the insertion part and the groove structure, so that the relative movement of the upper cross beam 3 and the cylinder body of the first leveling cylinder 11 in the horizontal direction (namely, the direction parallel to the XY plane in fig. 1) is limited, the stability of the cylinder body of the first leveling cylinder 11 when being connected with the upper cross beam 3 is improved, the connection positioning of the first leveling cylinder 11 and the upper cross beam 3 is facilitated, the shearing force applied to a fastener for connecting the cylinder body of the first leveling cylinder 11 and the upper cross beam 3 is reduced, and the service life of the fastener is prolonged.
Alternatively, as shown in fig. 1, 5 and 6, a sealing structure 7 is provided between the lower ends of the cylinder bodies of the ram cylinders of the leveling cylinder group 1 and the return cylinder group 2 and the rams.
The sealing structure 7 is used for ensuring the relative movement of the plunger cylinder and the cylinder body to be flexible and free and ensuring no oil leakage. Specifically, the seal structure 7 includes: the guide sleeve 71, the V group seal 72, the pressing sleeve 73, the adjusting gasket group 74, the flange 75, the dust ring 76, the dust ring gland 77 and the like. The guide sleeve 71, the V-group seal 72 and the pressing sleeve 73 are sequentially arranged between the inner wall of the cylinder body and the plunger piston along the Z-axis direction in fig. 1, and play a certain supporting role on the plunger piston while sealing the connection between the cylinder body and the plunger piston, on one hand, play a guiding role on the movement of the plunger piston in the cylinder body; on the other hand, the condition that the plunger is in direct contact with the inner wall of the cylinder body is avoided, the plunger is guaranteed to move smoothly in the cylinder body, and the lateral force bearing capacity of each leveling cylinder (return cylinder) is improved. The flange 75 is arranged at the lower end of the cylinder body and sleeved on the pressing sleeve 73, the adjusting gasket group 74 is arranged between the flange 75 and the lower end of the cylinder body, and the flange 75 and the adjusting gasket group 74 are connected with the cylinder body through fasteners (such as screws, bolts and the like). Wherein, the pressing sleeve 73 is provided with a slot adapted to be in plug fit with the flange 75, so that the pressing sleeve 73 and the flange 75 can move together in the Z-axis direction in fig. 1; furthermore, the distance between the flange 75 and the cylinder can be changed by changing the number of the gaskets in the adjusting gasket group 74, so that the pressure of the pressing sleeve 73 on the V-group seal 72 is adjusted, and the sealing performance of the V-group seal 72 is further adjusted. A dust ring 76 and a dust ring gland 77 are provided at the junction of the flange 75 and the plunger for dust protection.
Another embodiment of the invention provides a hydraulic machine, which comprises the above moving beam leveling structure.
The hydraulic machine in the embodiment comprises the movable beam leveling structure, an upper beam 3, a movable beam 4, a lower beam 5 and the like. The movable beam leveling structure of the hydraulic machine is provided with the leveling cylinder group 1 and the return cylinder group 2, and on one hand, the movable beam leveling structure is used for leveling the movable cross beam 4, so that the parallel precision of four corners of the movable cross beam 4 is ensured, and the normal and stable operation of the hydraulic machine is ensured; on the other hand, the leveling cylinder group 1 is also suitable for assisting the main hydraulic cylinder to push the movable beam 4 downwards so as to raise the upper limit of the pressure of the hydraulic machine on the workpiece, and the return cylinder group 2 also plays a role in balancing the weight of the movable beam 4 and driving the movable beam 4 to return. And the movable cross beam 4 is leveled by matching the leveling cylinder group 1 and the return cylinder group 2, so that the corresponding leveling cylinder and the return cylinder can simultaneously act on the movable cross beam 4, the hysteresis of the movable beam leveling structure when the movable cross beam 4 is leveled can be effectively reduced, and the movable beam leveling structure is ensured to have extremely high control precision and response sensitivity. The first return cylinder 21, the second return cylinder 22, the third return cylinder 23 and the fourth return cylinder 24 of the return cylinder group 2 are respectively in one-to-one correspondence and coaxial arrangement with the first leveling cylinder 11, the second leveling cylinder 12, the third leveling cylinder 13 and the fourth leveling cylinder 14 of the leveling cylinder group 1, so that the movable beam 4 can easily overcome the unbalance loading moment in the die forging operation process through a movable beam leveling structure, and the parallel accuracy of four corners of the movable beam 4 and the stability in the operation process are further ensured.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. A movable beam leveling structure is characterized by comprising a leveling cylinder group (1) suitable for being arranged at the upper end of a movable cross beam (4) of a hydraulic machine and a return cylinder group (2) suitable for being arranged at the lower end of the movable cross beam (4), wherein the leveling cylinder group (1) comprises a first leveling cylinder (11), a second leveling cylinder (12), a third leveling cylinder (13) and a fourth leveling cylinder (14) which are vertically arranged and distributed in an array manner, the first leveling cylinder (11) and the third leveling cylinder (13) are arranged diagonally, and the second leveling cylinder (12) and the fourth leveling cylinder (14) are arranged diagonally; the return cylinder group (2) comprises a first return cylinder (21), a second return cylinder (22), a third return cylinder (23) and a fourth return cylinder (24), and the first return cylinder (21), the second return cylinder (22), the third return cylinder (23) and the fourth return cylinder (24) are coaxially arranged with the first leveling cylinder (11), the second leveling cylinder (12), the third leveling cylinder (13) and the fourth leveling cylinder (14) respectively.
2. The walking beam leveling structure according to claim 1, wherein the first return cylinder (21), the second return cylinder (22), the third return cylinder (23), the fourth return cylinder (24), the first leveling cylinder (11), the second leveling cylinder (12), the third leveling cylinder (13), and the fourth leveling cylinder (14) are plunger cylinders, the cylinder bodies and the plungers of the first return cylinder (21), the second return cylinder (22), the third return cylinder (23) and the fourth return cylinder (24) are respectively connected with a lower beam (5) and the movable beam (4) of the hydraulic machine, and cylinder bodies and plungers of the first leveling cylinder (11), the second leveling cylinder (12), the third leveling cylinder (13) and the fourth leveling cylinder (14) are respectively connected with an upper cross beam (3) and the movable cross beam (4) of the hydraulic machine.
3. The walking beam leveling structure as recited in claim 2, wherein the conduits of the oil chambers of the first return cylinder (21), the second return cylinder (22), the third return cylinder (23) and the fourth return cylinder (24) are in communication with the conduits of the oil chambers of the third leveling cylinder (13), the fourth leveling cylinder (14), the first leveling cylinder (11) and the second leveling cylinder (12), respectively.
4. A walking beam leveling structure according to any one of claims 1-3, further comprising displacement sensors adapted to be arranged on the movable cross-beam (4), a plurality of said displacement sensors being arranged corresponding to the first leveling cylinder (11), the second leveling cylinder (12), the third leveling cylinder (13) and the fourth leveling cylinder (14), respectively.
5. A walking beam leveling structure according to claim 2 or 3, wherein the movable cross-beam (4) comprises a main beam (41) and a first guide beam (42) and a second guide beam (43) respectively arranged at both ends of the main beam (41), the first guide beam (42) being adapted to be connected with the plungers of the first leveling cylinder (11), the second leveling cylinder (12), the first return cylinder (21) and the second return cylinder (22); the second guide beam (43) is adapted to be connected with the plungers of the third leveling cylinder (13), the fourth leveling cylinder (14), the third return cylinder (23) and the fourth return cylinder (24).
6. The walking beam leveling structure according to claim 5, further comprising a ball hinge connecting structure (6), wherein the plungers of the first leveling cylinder (11), the second leveling cylinder (12), the first return cylinder (21) and the second return cylinder (22) are connected with the first guide beam (42) through the ball hinge connecting structure (6), and the plungers of the third leveling cylinder (13), the fourth leveling cylinder (14), the third return cylinder (23) and the fourth return cylinder (24) are connected with the second guide beam (43) through the ball hinge connecting structure (6).
7. A walking beam leveling structure as claimed in claim 6, wherein the ball hinge connecting structure (6) comprises a ball pad (61) and a gland (62), the first guide beam (42) and the second guide beam (43) are provided with mounting holes (44), the ball pad (61) is suitable for being arranged in the mounting holes (44), and the gland (62) is suitable for being inserted and matched with the mounting holes (44); the first leveling cylinder (11), the second leveling cylinder (12), the third leveling cylinder (13), the fourth leveling cylinder (14), the first return cylinder (21), the second return cylinder (22), the third return cylinder (23) and the plunger of the fourth return cylinder (24) are respectively and correspondingly connected with the ball pad (61) in a sliding manner, and the pressing cover (62) is limited.
8. A movable beam leveling structure as claimed in claim 2 or 3, wherein a first spigot structure is provided at the connection of the leveling cylinder group (1) and the upper cross beam (3), and the leveling cylinder group (1) and the upper cross beam (3) are adapted to be inserted and matched at the first spigot structure; and/or a second spigot structure is arranged at the joint of the return cylinder group (2) and the lower cross beam (5), and the return cylinder group (2) and the lower cross beam (5) are suitable for being matched with each other at the second spigot structure in an inserting manner.
9. A movable beam leveling structure as claimed in claim 2 or 3, wherein a sealing structure (7) is arranged between the lower ends of the cylinder bodies of the plunger cylinders of the leveling cylinder group (1) and the return cylinder group (2) and the plungers.
10. A hydraulic machine, characterized by comprising a walking beam leveling structure as recited in any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111489613.2A CN114179425A (en) | 2021-12-08 | 2021-12-08 | Movable beam leveling structure and hydraulic press |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111489613.2A CN114179425A (en) | 2021-12-08 | 2021-12-08 | Movable beam leveling structure and hydraulic press |
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| CN202111489613.2A Pending CN114179425A (en) | 2021-12-08 | 2021-12-08 | Movable beam leveling structure and hydraulic press |
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Cited By (1)
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| CN116021830A (en) * | 2023-01-04 | 2023-04-28 | 海安海太铸造有限公司 | Beam bearing assembly for large oil press and application method |
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