CN113477864B - Four-point distributed modular combined bottom transmission press - Google Patents
Four-point distributed modular combined bottom transmission press Download PDFInfo
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- CN113477864B CN113477864B CN202110847553.0A CN202110847553A CN113477864B CN 113477864 B CN113477864 B CN 113477864B CN 202110847553 A CN202110847553 A CN 202110847553A CN 113477864 B CN113477864 B CN 113477864B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 30
- 230000007246 mechanism Effects 0.000 claims abstract description 118
- 239000003638 chemical reducing agent Substances 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 210000004907 gland Anatomy 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims 6
- 241000555676 Malassezia Species 0.000 abstract description 2
- 238000005242 forging Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 10
- 230000007547 defect Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/10—Drives for forging presses
- B21J9/18—Drives for forging presses operated by making use of gearing mechanisms, e.g. levers, spindles, crankshafts, eccentrics, toggle-levers, rack bars
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/04—Frames; Guides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/26—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/26—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks
- B30B1/266—Drive systems for the cam, eccentric or crank axis
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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
- B30B15/04—Frames; Guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/04—Frames; Guides
- B30B15/041—Guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/14—Control arrangements for mechanically-driven presses
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Presses And Accessory Devices Thereof (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The invention discloses a four-point distributed modular combined bottom transmission press, and belongs to the technical field of forging equipment. The device comprises an upper beam and a lower beam, wherein a stand column is connected between the upper beam and the lower beam; the sliding block is slidably arranged on the upright post; the device also comprises 4 power box mechanisms which are positioned below the lower cross beam and have the same structure, and the power box mechanisms are connected with the sliding blocks through a pull rod nut mechanism with adjustable height; a magnetic ruler mechanism is arranged between the sliding block and the upright post; two sides of the upper beam are respectively fixed with a balance cylinder mechanism. The press machine adopts a modularized combined structure, and can be assembled into bottom transmission presses with different parameters; the four-point distributed power system is adopted, so that the running stability is improved by the mode that the eccentric forces in the horizontal direction are offset by the four small malassezia carts, and the requirements of users with high stroke frequency, large table top, large tonnage, large opening and the like of the press are met; automatic adjustment of the closing height of the sliding block and four-point leveling are realized.
Description
Technical Field
The invention relates to the technical field of forging equipment, in particular to a four-point distributed modular combined bottom transmission press.
Background
With the development of industry products such as automobile home appliances and the like to multiple varieties and small batches, the production line of a matched stamping factory is changed, a single-process die is integrated to a multi-station die, the single-process die is widely applied to automatic stamping lines, and a manipulator, a robot and the like, has wider requirements on a working table surface of stamping equipment, larger tonnage, higher and higher stroke frequency, better stability and more special requirements on the market of the press machine for ordering.
The bottom drive press is one of the existing presses, such as a bottom drive press structure (CN 206690587U) disclosed in chinese patent; the device comprises a base, wherein a workbench is arranged on the base, a sliding block is arranged above the workbench, the lower part of the sliding block is fixedly connected with guide posts, the base is a closed box body, through holes are formed in the workbench corresponding to the guide posts, the guide posts penetrate through the corresponding through holes and then downwards extend into the base, supporting holes for horizontally installing a crankshaft are coaxially formed in the left side and the right side of the base, a connecting rod is arranged at the eccentric end of the crankshaft, and the lower end of each guide post is in transmission connection with the upper end of the connecting rod through a transmission block; one end of the crankshaft extending out of the base is connected with the driving mechanism in a transmission way. The workbench is provided with an upright post, the upper end of the upright post is fixed with a top plate, a balance cylinder is arranged on the top plate, and the extending end of a piston rod of the balance cylinder is connected with the sliding block through a hanging block.
The defects of the technology are that:
first, adopt traditional end drive press main drive structure mode, a transmission shaft + both sides crank link mechanism, adorn drive mechanism into the base, the defect of this mode has: the assembly and maintenance are difficult, the tonnage of the worktable surface and the nominal force are not suitable to be large, and the two sides of the worktable cannot be fed and discharged due to the arrangement of connecting rods; the opening is not suitable for being large and the stroke frequency is not suitable for being high due to the lack of a counteracting mechanism for the eccentric force of the crank connecting rod;
secondly, the automatic adjustment mechanism for the closed height is not provided, so that the die is inconvenient to die, and the universality of the bottom transmission press is affected;
thirdly, the press for special order needs to be re-sized, the difficulty of the production and manufacture organization of a single press is large, the period is long, the cost is high, and a large pressure is formed for press manufacturers who are used to mass production.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a four-point distributed modular combined bottom transmission press. The invention adopts a four-point distributed power system, namely, four separate servo motors are used for driving a crank-link mechanism power box module and a set of total control driver system is shared for realizing the combined driving, and the design targets of high stroke frequency, large table top, large tonnage, large opening and the like are realized in a mode of mutually canceling the eccentric forces in the horizontal direction of four small malassezia carts.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a four-point distributed modular combined bottom transmission press comprises an upper beam and a lower beam, wherein a stand column is connected between the upper beam and the lower beam; the sliding block is slidably arranged on the upright post; the device also comprises 4 power box mechanisms which are positioned below the lower cross beam and have the same structure, and the power box mechanisms are connected with the sliding blocks through a pull rod nut mechanism with adjustable height; and a magnetic ruler mechanism is arranged between the sliding block and the upright post.
It is further: the 4 power box mechanisms are symmetrically arranged at the center of the lower cross beam; the power box mechanism is fixed below the lower beam through a cylindrical pin and a screw; the number of the upright posts is four, and the four upright posts are symmetrically arranged at the center of the lower cross beam.
The pull rod nut mechanism comprises a pull rod; the pull rod vertically penetrates through the sliding block, and is fixed with the sliding block through the integral nut and the split nut; the power output end of the power box mechanism is a guide pillar vertically and slidably arranged in a guide hole of the power box mechanism; the lower end of the pull rod is connected to the guide post through threaded fit.
The guide post is rotatably arranged in a guide hole of the power box mechanism; the power box mechanism comprises a worm gear box mechanism for adjusting the pull rod nut mechanism; the worm gear box mechanism comprises a worm gear box body fixed on the power box body, and worm gears and worm gear shafts which are matched with each other are arranged in the worm gear box body; the worm wheel is sleeved outside the guide post in a sliding way, and the worm wheel is connected with the guide post through a sliding key; the worm-wheel shaft input end is connected with an adjusting servo motor through a coupling sleeve and a key, the adjusting servo motor is fixed on a motor bracket, and the motor bracket is arranged on the power box body.
The power box mechanism comprises a crankshaft, a ball head connecting rod, a speed reducer and a main servo motor; the lower end of the guide post is provided with a lower ball bowl and an upper ball bowl through an upper ball bowl gland; the ball head of the ball head connecting rod is connected with the lower ball bowl and the upper ball bowl in a matched manner, and one end of the ball head connecting rod, which is far away from the ball head, is connected with the crankshaft in a rotating manner; the two ends of the crankshaft are connected with a front supporting seat and a rear supporting seat, and the front supporting seat and the rear supporting seat are arranged on the power box body; the output shaft of the speed reducer is connected with the input end of the crankshaft through a crankshaft coupling sleeve and a key; the output end of the main servo motor is connected with the input end of the speed reducer.
The upper cross beam, the upright post and the lower cross beam are fixedly connected through square keys and screws, and a working table plate opposite to the sliding block is fixed on the lower cross beam; the four upright posts are arranged in a rectangular shape, and upright post guide rails matched with the sliding blocks are arranged on the inner sides of the upright posts; the upright post guide rail comprises a rectangular right-angle guide rail which is fixed on the inner side of the upright post through a plurality of fixing blocks; and the four corners of the sliding block are respectively fixed with a sliding block guide rail which is vertically matched with the rectangular right-angle guide rail in a sliding way.
The number of the magnetic scale mechanisms is four, and the magnetic scale mechanisms are magnetic scales and magnetic heads; the magnetic rules are fixed on the upright posts in one-to-one correspondence, and the magnetic heads are fixed at the positions of the side surfaces of the sliding blocks, which are matched with the magnetic rules relatively.
Two sides of the upper beam are respectively fixed with a balance cylinder mechanism; the balance cylinder mechanism comprises a balancer frame fixedly connected with the upper cross beam, and a control valve block, an energy accumulator and a vertically arranged plunger cylinder are arranged on the balancer frame; the control valve block is respectively communicated with the plunger cylinder and the energy accumulator through an oil pipe, and is also communicated with the oil supplementing pump station system through another oil pipe; the lower end of the piston rod of the plunger cylinder is connected with a connecting block which is arranged on the sliding block; the balancer frame is formed by welding or casting a plunger cylinder seat, a valve block bracket, an energy accumulator pillar and a frame bottom plate; the frame bottom plate is connected and mounted on the upper cross beam through bolts; the plunger cylinder is connected and installed on the plunger cylinder seat through a bolt; the control valve block is installed on the valve block bracket through bolt connection; the energy accumulator is fixed on one side of the energy accumulator pillar through the supporting plate and the anchor ear.
The power box mechanism is arranged in a foundation installation pit, and a light rail is arranged at the bottom of the foundation installation pit; and the light rail is provided with a ground rail lifting vehicle for moving the power box mechanism out of or into the lower cross beam.
The power box mechanism is replaced by a hydraulic cylinder mechanism module.
The beneficial effects of the invention are as follows:
1. the press adopts a modularized combined structure;
the power mechanism of the press is designed into a four-point distributed power system, namely four power box component modules with identical structures, a lower beam module, a sliding block module, a pull rod module, a stand column module, an upper beam module and the like. The bottom transmission press with different parameters such as tonnage, travel, working table top and the like can be assembled by adopting the combination of different modules.
2. The power mechanism adopts a four-point distributed power system;
four separate servo motors are used for driving crank-link mechanisms (power boxes), and a set of total control driver system is shared for realizing the combined driving, so that a mode of 'four small maraca' is adopted. Compared with the transmission mechanism of the press with the same tonnage, the mode has the advantages that the pressure (tensile force) output by each power box is only one fourth of that, the design and manufacturing difficulties are obviously reduced, and the cost is also reduced.
3. The four separate power boxes can offset the eccentric inertia component force in the horizontal direction in pairs, so that the running stability is improved;
four separate power boxes (servo motors drive crank-link mechanisms) are used, a set of total control driver system is shared for realizing the joint drive, and the crank-link mechanisms which are arranged symmetrically in pairs can adopt two crankshafts to reversely and synchronously rotate during operation, so that eccentric inertia component forces in the horizontal direction of the crank-link mechanisms are mutually offset, and the requirements of high stroke times and stable operation of the press are further met.
4. The press is convenient to manufacture and maintain;
the four separate servo motors drive crank-link mechanisms (power box mechanisms) which are in modularized design, and the structures are completely consistent and can be interchanged; each servo motor drives a crank connecting rod mechanism and the like to be assembled on a power box to form a whole, the lower cross beam is moved out through the ground rail lifting vehicle, and then the ground pit is lifted out for maintenance by the workshop travelling crane, so that the defect that the traditional bottom transmission press is inconvenient to assemble and maintain is overcome.
5. The sliding block closed height mechanism is arranged on the power box, so that the motion inertia of the sliding block is reduced;
the four power box parts are provided with a crank connecting rod closed height adjusting mechanism driven by an independent servo motor; the four discrete mechanisms can synchronously act through the control of the master control system to finish the function of adjusting the closing height of the sliding block. The sliding block closed height mechanism is arranged on the power box, so that the motion inertia of the sliding block is reduced, and the running stability of the press is improved.
6. The sliding block not only can realize automatic adjustment of the sealing height, but also has a four-point leveling function;
the four-point distributed crank connecting rod closed height adjusting mechanism can synchronously drive each discrete adjusting servo motor through a master control system, and forms a closed loop by means of data fed back by a magnetic ruler fixed on the upright post, so that automatic adjustment of the closed height is realized;
the four-point distributed crank connecting rod closed height adjusting mechanism can also be independently controlled by a master control system, each separate servo motor is independently driven, and the four-point leveling function of the sliding block is completed by means of data fed back by a magnetic ruler fixed on a corresponding upright post.
7. The sliding block not only has an overload protection function, but also has an unbalanced load overload protection function;
the crank-link mechanism of the four-point distributed power box drives a servo motor and has an overload protection function; the overload protection value of the sliding block is the sum of the overload protection values of four separate servo motors. When the sliding block is required to be subjected to unbalanced load overload protection, only a section of program is needed to be added on the main control system, the current difference values of the four driving servo motors are set and detected, and when the current difference values exceed a set value, the machine is stopped for protection.
8. The unbalanced load bearing capacity of the sliding block is enhanced;
the force application points of the sliding block are changed from two points on two sides of a traditional bottom transmission press machine into four points on four corners, so that the load rigidity of the sliding block, and particularly the unbalanced load resistance is improved.
9. Breaks through the contraindication that the bottom transmission press can not feed in the left-right direction;
the force application points of the sliding blocks are changed from two points on two sides of a traditional bottom transmission press machine into four points at four corners, and then the space of the original connecting rod mechanism placed at the side opening of the machine tool is released, so that materials (a die or a moving table) can be fed in and discharged in the left-right direction.
10. The upright post and the upper cross beam basically do not bear working load, and can be designed in a lightweight way, so that the weight and the manufacturing cost are reduced.
11. After the vibration reduction pads are added on four feet of the lower beam, vibration energy of the press can be absorbed, the press is suitable for being designed into a large-stroke and rapid press, and the application field of the bottom transmission press is expanded.
Drawings
FIG. 1 is a front view of an embodiment of the present invention;
FIG. 2 is a left side view of an embodiment of the present invention;
FIG. 3 is a top view of an embodiment of the present invention;
FIG. 4 is a bottom view of an embodiment of the present invention;
FIG. 5 is a schematic perspective view of an embodiment of the present invention;
FIG. 6 is a diagram of a driving mechanism (A-A cross-sectional view) according to an embodiment of the present invention
FIG. 7 is a front view of a power box component in accordance with a first embodiment of the present invention;
FIG. 8 is a left side view of a power box component in accordance with one embodiment of the present invention;
FIG. 9 is a top view of a power box component according to one embodiment of the invention;
FIG. 10 is a cross-sectional view (B-B cross-sectional view) of a power box component in accordance with one embodiment of the present invention;
FIG. 11 is an enlarged view of a center pillar rail and slider rail according to an embodiment of the present invention;
FIG. 12 is an enlarged view of a balance cylinder mechanism in accordance with an embodiment of the present invention;
FIG. 13 shows a ground track lift truck in a pit in accordance with an embodiment of the present invention;
FIG. 14 is a front view of a second embodiment of the present invention;
FIG. 15 is a left side view of a second embodiment of the present invention;
in the figure: 1. a balance cylinder mechanism 2, an upper cross beam, 3, an upright post, 4, a sliding block, 5, a working table plate, 6, a lower cross beam, 7, a power box mechanism, 8, an upright post guide rail, 9, a pull rod nut mechanism, 10 and a magnetic scale mechanism,
11. the whole nut, 12, the split nut, 13, the pull rod, 14, the guide post, 15, the lower spherical bowl, 16, the upper spherical bowl, 17, the upper spherical bowl gland, 18, the rear supporting seat, 19, the ball head connecting rod, 20, the connecting rod cover, 21 and the crankshaft,
22. a power box body 23, a speed reducer 24, a main servo motor 25, an adjusting servo motor 26, a motor bracket 27 and a worm gear box mechanism,
28. worm shaft connecting sleeve 29, sliding key 30, worm gear case gland 31, worm gear 32, worm gear case 33, oil pool plate 34, front supporting seat 35, crankshaft connecting sleeve,
36. the hydraulic cylinder device comprises an energy accumulator, 37, a plunger cylinder, 38, a control valve block, 39, a balancer frame, 40, a connecting block, 41, a magnetic scale, 42, a magnetic head, 43, square keys, 44, a sliding block guide rail, 45, a fixed block, 46, a rectangular right-angle guide rail, 47, energy accumulator struts, 48, a valve block support, 49, a frame bottom plate, 50, a plunger cylinder seat, 51, a supporting plate, 52, a hoop, 53, a foundation installation pit, 54, a light rail, 55, a ground rail lift car, 56 and a hydraulic cylinder mechanism.
Description of the embodiments
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 5, a four-point distributed modular combined bottom driving press is provided, wherein the split frame comprises an upper beam 2, a lower beam 6 and four upright posts 3, the four upright posts 3 are arranged in a rectangular shape, and the upper beam 2, the upright posts 3 and the lower beam 6 are fixedly connected through square keys 43 and screws. The sliding block 4 is vertically and slidably arranged on the upright post 3, and a working table plate 5 opposite to the sliding block 4 is fixed on the lower cross beam 6. The power box mechanisms 7 with the same structure are respectively fixed below four corners of the lower cross beam 6, the upper ends of the power box mechanisms 7 are connected with pull rod nut mechanisms 9 which are vertically arranged, and the upper ends of the pull rod nut mechanisms 9 are connected with sliding blocks 4. The four corners of the upright post 3 and the sliding block 4 are provided with a magnetic ruler mechanism 10.
Referring again to fig. 6, the pull rod nut mechanism 9 includes a pull rod 13, the pull rod 13 being vertically arranged, and the pull rod 13 being fixed to the slider 4 by the integral nut 11 and the split nut 12. The lower end of the pull rod 13 is connected with a guide post 14 in the power box mechanism 7 through threaded fit. The connection of the pull rod 13 and the sliding block 4 adopts a split nut, which is mainly convenient for assembly and can reduce the design of a step shaft of the pull rod and the cost.
Referring to fig. 7 to 10 again, the guide post 14 is a power output end of the power box mechanism 7, the guide post 14 is vertically slidably mounted in a guide hole of the power box mechanism 7, and the guide post 14 can rotate in the guide hole of the power box mechanism 7;
the power box mechanism 7 further includes a crankshaft 21, a ball-end link 19, a link cover 20, and the like. The lower ball bowl 15 and the upper ball bowl 16 are arranged under the guide post 14 through an upper ball bowl gland 17. The ball head of the ball head connecting rod 19 is movably matched and arranged on the lower ball bowl 15 and the upper ball bowl 16, and the other end of the ball head connecting rod 19 is rotatably and fixedly connected with the crankshaft 21 through the connecting rod cover 20. The crankshaft 21 is mounted on the power box 22 through a front bearing 33 and a rear bearing 18 which are in movable fit. The input end of the crankshaft 21 is connected with the output shaft of the speed reducer 23 through a crankshaft coupling sleeve 35 and a key. The main servo motor 24 is installed at the input end of the corresponding speed reducer 23. The crankshaft is not directly arranged on the power box body 22, and mainly when the eccentricity of the crankshaft is too large, the crank assembly process hole on the power box body is required to be correspondingly increased, and the design and manufacturing cost is also increased. The crankshaft is arranged on the power box body through the detachable supporting seat, so that the modularized design and production are facilitated.
The power box mechanism 7 also comprises a worm gear box mechanism 27 for driving the guide post 14 to rotate, so as to adjust the height of the pull rod nut mechanism 9;
the worm gear mechanism 27 includes a worm wheel 31, a worm wheel shaft 28, a worm gear case gland 30, and the like. The worm wheel 31 and the worm wheel shaft 28 are installed in the worm gear box 32, and the worm gear box 32 is installed on the power box 22. The sliding key 29 is installed in the hole groove of the worm wheel 31, the guide post 14 slides in the guide hole of the power box body 22, and the key groove of the guide post 14 simultaneously carries out vertical sliding in a movable fit with the sliding key 29. The input end of the worm wheel shaft 28 is connected with the adjusting servo motor 25 through a coupling sleeve and a key. The adjustment servo motor 25 is fixed on a motor bracket 26, and the motor bracket 26 is mounted on the power box 22. The worm gear case mechanism is selectively designed on the power case body instead of the sliding block, and mainly avoids the phenomenon that the sliding block structure is too complex, the weight is increased, and the inertia force is increased to influence the operation stability of the press.
Referring to fig. 11 and 12, a balance cylinder mechanism 1 is respectively fixed on both sides of the upper beam 2;
the balance cylinder mechanism 1 includes a balancer frame 39 fixedly connected to the upper cross member 2, and the balancer frame 39 is formed by welding or casting a plunger cylinder block 50, a valve block bracket 48, an accumulator stay 47, and a frame bottom plate 49. The balancer frame 39 adopts a modularized integrated design, and can be assembled in a final assembly after the independent assembly of the balance cylinder mechanism is completed, so that the balancer frame is convenient to assemble and disassemble and has good maintainability. The frame bottom plate 49 is mounted on the upper cross beam 2 by bolting; the plunger cylinder 37 is mounted on the plunger cylinder seat 50 by bolting; the control valve block 38 is mounted on the valve block bracket 48 by bolting; the accumulator 36 is fixed to the accumulator column 47 side by a bracket 51 and a hoop 52. The control valve block 38 is respectively communicated with the plunger cylinder 37 and the accumulator 36 through oil pipes, and the control valve block 38 is also communicated with the oil supplementing pump station system through another oil pipe. The lower end of the piston rod of the plunger cylinder 37 is connected with a connecting block 40, and the connecting block 40 is arranged on the sliding block 4. The plunger cylinder 37, the valve block 38, the accumulator 36, etc. constitute a hydraulic spring, by means of which a hydraulic spring force is applied to a coupling piece 40 fixed to the slide.
The plunger cylinder, the valve block, the accumulator and the like of the balance cylinder mechanism form a hydraulic spring, the piston rod of the plunger cylinder is used for enabling hydraulic tension which is larger than the weight of the sliding block part and is approximately constant to act on the connecting block, the connecting block is fixed on two sides of the sliding block, and the sliding block part is pulled upwards until the tooth surfaces of the threads of the pull rod 13 and the guide post 14 are contacted and compacted, so that the aims of eliminating the axial clearance of the threads and improving the repeated positioning precision of the bottom dead center of the sliding block are achieved.
Referring to fig. 11, the inner side of the upright 3 is provided with an upright guide rail 8, the upright guide rail 8 includes a rectangular right-angle guide rail 46, and the rectangular right-angle guide rail 46 is fixed on the inner side of the upright 3 by a plurality of fixing blocks 45. The four corners of the slide block 4 are respectively fixed with a slide block guide rail 44, and the slide block guide rails 44 are vertically matched with rectangular right-angle guide rails 46 in a sliding manner. The fixing block 45 is provided with a screw for adjusting the clearance between the rectangular right-angle guide rail 46 and the friction pair of the slider guide rail 44 on the slider 4, so that the slider can slide up and down along the rectangular right-angle guide rail.
As shown in fig. 11, the magnetic scale mechanism 10 includes four magnetic scales 41 and a magnetic head 42. The magnetic scale 41 is fixed on the upright 3, and the magnetic head 42 is correspondingly fixed on the side surface of the sliding block 4 and vertically slides in the upright 3 along with the sliding block 4. The magnetic scale mechanism 10 is arranged at four corners of the sliding block 4, and the main purpose is to instantly measure the accurate distance between each corner of the sliding block and the upper plane of the working table plate, and can feed back a master control system to realize the automatic leveling target of the four corners of the sliding block and fulfill the requirement of automatic die adjusting function.
Referring to fig. 13, a light rail 54 is embedded in a foundation installation pit 53; the power box mechanism 7 can be moved out of or into the lower cross beam 6 by the ground rail lift truck 55. Then the vehicle crane is used for lifting out of the pit for maintenance, and the defect that the traditional bottom transmission press is inconvenient to assemble and maintain is overcome.
Press operating principle:
when the press machine operation start button is pressed, the master control system sends signals to the main servo motor drivers of the four power box mechanisms, and two main servo motors rotate forward and two synchronous reverse. As shown in fig. 6, the main servo motor of the power box mechanism is symmetrically arranged in the front-rear direction of the press, and the front one rotates forward, the rear one rotates reversely synchronously, or vice versa. The purpose of synchronous reverse rotation is to offset the eccentric inertia force of the crank-link mechanism in the horizontal direction and improve the running stability of the machine tool.
The transmission process comprises the following steps: the main servo motor 24 drives the speed reducer 23, the speed reducer 23 drives the crankshaft 21, and the crankshaft 21 drives the ball-end connecting rod 19 and the connecting rod cover 20 to push the guide post 14 to vertically slide up and down; the guide post 14 drives the pull rod 13 to synchronously slide through threaded connection, and the pull rod 13 drives the slide block 4 to synchronously and vertically move through the integral nut 11 and the split nut 12 to finish the slide block stamping process.
Compared with the traditional bottom transmission press, the design thought that a transmission shaft and crank link mechanisms on two sides are arranged in the lower cross beam is changed, the mode that the transmission pull rods are placed at four corners of the sliding blocks and power box mechanism modules with the same structure are respectively fixed below the four corners of the lower cross beam is adopted, and a series of defects that the traditional bottom transmission press is difficult to assemble and maintain, the worktable surface and the nominal force tonnage are not large, the two sides of the worktable cannot feed and discharge due to the arrangement of the connecting rods, the opening is not large when the crank connecting rods do not have eccentric force counteracting mechanisms, the stroke frequency is not high and the like are overcome.
Secondly, a four-point distributed power system is adopted, namely, four separate servo motors are used for driving a crank connecting rod machine
The mechanism (power box mechanism) shares a set of total control driver system to realize the combined driving, and adopts a mode of four small maraca carts. Compared with the transmission mechanism of the press with the same tonnage, the mode has the advantages that the pressure (tensile force) output by each power box mechanism is only one fourth of that, the design and manufacturing difficulties are obviously reduced, and the cost is also reduced.
Furthermore, the four-point distributed modular combined bottom transmission press disclosed by the invention is also a servo mechanical press, and can be used for programming and controlling the displacement, pressure and speed running curves of the sliding block so as to meet the functional requirements of the servo press.
Finally, the slider closing height adjustment principle: the four-point distributed type power box worm and worm wheel closed height adjusting mechanism can synchronously drive each discrete adjusting servo motor through a master control system, and a closed loop is formed by means of data fed back by a magnetic ruler fixed on the upright post, so that automatic adjustment of the closed height is realized. The four-point distributed closed height adjusting mechanism can also be independently controlled by a master control system, each separate servo motor is independently driven, and the four-point leveling function of the sliding block is completed by means of data fed back by a magnetic ruler fixed on a corresponding upright post.
As shown in fig. 14 and 15, the second embodiment is different from the first embodiment in that:
the power box mechanism module is replaced by a hydraulic cylinder mechanism module, and the bottom transmission mechanical press is converted into a bottom transmission hydraulic press.
Claims (7)
1. A four-point distributed modular combined bottom transmission press comprises an upper cross beam (2) and a lower cross beam (6), wherein an upright post (3) is connected between the upper cross beam (2) and the lower cross beam (6); the sliding block (4) is slidably arranged on the upright post (3); the method is characterized in that: the device also comprises 4 power box mechanisms (7) which are positioned below the lower cross beam (6) and have the same structure, wherein the power box mechanisms (7) are connected with the sliding blocks (4) through a pull rod nut mechanism (9) with adjustable height; a magnetic ruler mechanism (10) is arranged between the sliding block (4) and the upright post (3);
the pull rod nut mechanism (9) comprises a pull rod (13); the pull rod (13) vertically penetrates through the sliding block (4), and the pull rod (13) is fixed with the sliding block (4) through the integral nut (11) and the split nut (12);
the power output end of the power box mechanism (7) is a guide pillar (14) vertically and slidably arranged in a guide hole of the power box mechanism (7); the lower end of the pull rod (13) is connected to the guide post (14) through threaded fit;
the guide post (14) is rotatably arranged in a guide hole of the power box mechanism (7);
the power box mechanism (7) comprises a worm gear box mechanism (27) for adjusting the pull rod nut mechanism (9);
the worm gear case mechanism (27) comprises a worm gear case body (32) fixed on the power case body (22), and a worm wheel (31) and a worm gear shaft (28) which are mutually matched are arranged in the worm gear case body (32); the worm wheel (31) is sleeved outside the guide post (14) in a sliding way, and the worm wheel (31) is connected with the guide post (14) through a sliding key (29); the input end of the worm wheel shaft (28) is connected with an adjusting servo motor (25) through a coupling sleeve and a key, the adjusting servo motor (25) is fixed on a motor bracket (26), and the motor bracket (26) is arranged on the power box body (22).
2. The four-point distributed modular composite bottom drive press of claim 1, wherein: the 4 power box mechanisms (7) are arranged symmetrically at the center of the lower cross beam (6); the power box mechanism (7) is fixed below the lower cross beam (6) through a cylindrical pin and a screw; the number of the upright posts (3) is four, and the four upright posts (3) are symmetrically arranged at the center of the lower cross beam (6).
3. The four-point distributed modular composite bottom drive press of claim 1, wherein: the power box mechanism (7) comprises a crankshaft (21), a ball connecting rod (19), a speed reducer (23) and a main servo motor (24); the lower end of the guide post (14) is provided with a lower ball bowl (15) and an upper ball bowl (16) through an upper ball bowl gland (17); the ball head of the ball head connecting rod (19) is connected with the lower ball bowl (15) and the upper ball bowl (16) in a matching way, and one end of the ball head connecting rod (19) far away from the ball head is connected with the crankshaft (21) in a rotating way; the two ends of the crankshaft (21) are connected with a front supporting seat (33) and a rear supporting seat (18), and the front supporting seat (33) and the rear supporting seat (18) are arranged on the power box body (22); an output shaft of the speed reducer (23) is connected with an input end of the crankshaft (21) through a crankshaft coupling sleeve (35) and a key; the output end of the main servo motor (24) is connected with the input end of the speed reducer (23).
4. A four-point distributed modular composite bottom drive press as defined in claim 2, wherein: the upper cross beam (2), the upright post (3) and the lower cross beam (6) are fixedly connected through square keys (43) and screws, and a working table plate (5) opposite to the sliding block (4) is fixed on the lower cross beam (6); the four upright posts (3) are arranged in a rectangular shape, and upright post guide rails (8) matched with the sliding blocks (4) are arranged on the inner sides of the upright posts (3); the upright post guide rail (8) comprises a rectangular right-angle guide rail (46), and the rectangular right-angle guide rail (46) is fixed on the inner side of the upright post (3) through a plurality of fixing blocks (45); and the four corners of the sliding block (4) are respectively fixed with a sliding block guide rail (44), and the sliding block guide rails (44) are vertically matched with the rectangular right-angle guide rails (46) in a sliding manner.
5. A four-point distributed modular composite bottom drive press as defined in claim 2, wherein: the number of the magnetic scale mechanisms (10) is four, and the magnetic scale mechanisms (10) comprise magnetic scales (41) and magnetic heads (42); the magnetic scales (41) are fixed on the upright posts (3) in a one-to-one correspondence manner, and the magnetic heads (42) are fixed at positions where the side surfaces of the sliding blocks (4) are matched with the magnetic scales (41) in a relative manner.
6. The four-point distributed modular composite bottom drive press of claim 1, wherein: two sides of the upper cross beam (2) are respectively fixed with a balance cylinder mechanism (1);
the balance cylinder mechanism (1) comprises a balancer frame (39) fixedly connected with the upper cross beam (2), and a control valve block (38), an energy accumulator (36) and a vertically arranged plunger cylinder (37) are arranged on the balancer frame (39); the control valve block (38) is respectively communicated with the plunger cylinder (37) and the energy accumulator (36) through an oil pipe, and the control valve block (38) is also communicated with the oil supplementing pump station system through another oil pipe; the lower end of a piston rod of the plunger cylinder (37) is connected with a connecting block (40), and the connecting block (40) is arranged on the sliding block (4);
the balancer frame (39) is formed by welding or casting a plunger cylinder seat (50), a valve block bracket (48), an energy accumulator support (47) and a frame bottom plate (49); the frame bottom plate (49) is connected and mounted on the upper cross beam (2) through bolts; the plunger cylinder (37) is mounted on the plunger cylinder seat (50) through bolt connection; the control valve block (38) is mounted on the valve block bracket (48) through bolt connection; the energy accumulator (36) is fixed on one side of the energy accumulator support column (47) through a supporting plate (51) and a hoop (52).
7. A four-point distributed modular composite bottom drive press as defined in any one of claims 1 to 6, wherein: the power box mechanism (7) is arranged in a foundation installation pit (53), and a light rail (54) is arranged at the bottom of the foundation installation pit (53); the light rail (54) is provided with a ground rail lifting vehicle (55) for moving the power box mechanism (7) out of or into the lower cross beam (6).
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203293555U (en) * | 2013-02-06 | 2013-11-20 | 宁波精达成形装备股份有限公司 | Overhead oil cylinder crankshaft toggle lever type four-column press machine |
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| CN203077633U (en) * | 2012-12-07 | 2013-07-24 | 江苏扬力集团有限公司 | Bottom transmission press machine structure |
| JP6401470B2 (en) * | 2014-03-17 | 2018-10-10 | コマツ産機株式会社 | Press machine |
| CN105082593B (en) * | 2015-09-07 | 2016-11-30 | 一重集团大连设计研究院有限公司 | Driven by Hydraulic Cylinder machinery multi-connecting rod servo press machine |
| CN206690587U (en) * | 2017-03-28 | 2017-12-01 | 扬力集团股份有限公司 | A kind of bottom drive press structure |
| CN113145781B (en) * | 2021-02-24 | 2023-01-13 | 周美丽 | High-speed hydraulic machine with main cylinder stroke not containing idle stroke |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203293555U (en) * | 2013-02-06 | 2013-11-20 | 宁波精达成形装备股份有限公司 | Overhead oil cylinder crankshaft toggle lever type four-column press machine |
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