阅读说明：本技术 一种四点分布式模块化组合底传动压力机 (Four-point distributed modular combined bottom transmission press ) 是由 秦剑 秦泰然 于 2021-07-27 设计创作，主要内容包括：本发明公布一种四点分布式模块化组合底传动压力机,属于锻压装备技术领域。包括上横梁、下横梁,上横梁、下横梁之间连接有立柱；滑块滑动安装在立柱上；还包括4个位于下横梁下方的结构相同的动力箱机构,所述动力箱机构通过高度可调的拉杆螺母机构连接所述滑块；所述滑块与立柱之间安装有磁尺机构；上横梁两侧分别固定有一个平衡缸机构。本发明压力机采用模块化组合结构,可组装成不同参数的底传动压力机；采用四点分布式动力系统,通过“四匹小马拉大车、水平方向偏心力相互抵消”的方式,提高运转平稳性,满足压力机冲次高、台面大、吨位大、开口大等用户需求；实现了滑块封闭高度的自动调整和四点调平。(The invention discloses a four-point distributed modular combined bottom transmission press, and belongs to the technical field of forging equipment. Comprises an upper cross beam and a lower cross beam, wherein an upright post is connected between the upper cross beam and the lower cross beam; the sliding block is slidably arranged on the upright post; the power box mechanism is connected with the sliding block through a pull rod nut mechanism with adjustable height; a magnetic scale 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 modular combined structure and can be assembled into bottom transmission press machines with different parameters; by adopting a four-point distributed power system and adopting a mode of mutually offsetting four small horse drawing carts and eccentric forces in the horizontal direction, the operation stability is improved, and the requirements of users such as high punching frequency, large table top, large tonnage, large opening and the like of a press machine are met; the automatic adjustment and four-point leveling of the sealing height of the sliding block are realized.)

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 arranged on the upright post (3) in a sliding way; the method is characterized in that: the power box mechanism (7) is arranged below the lower cross beam (6) and has the same structure, and the power box mechanism (7) is connected with the sliding block (4) through a pull rod nut mechanism (9) with adjustable height; and a magnetic scale mechanism (10) is arranged between the sliding block (4) and the upright post (3).

2. The four-point distributed modular combination bottom drive press of claim 1, wherein: the cross beams (6) below the 4 power box mechanisms (7) are arranged in a central symmetry manner; 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 arranged below the cross beam (6) in a central symmetry manner.

3. The four-point distributed modular combination bottom drive press of claim 1, wherein: 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) which is vertically and slidably installed 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 thread fit.

4. The four-point distributed modular combination bottom drive press of claim 3, wherein: 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) used for adjusting the pull rod nut mechanism (9);

the worm gear box mechanism (27) comprises a worm gear box body (30) fixed on a power box body (32), and a worm gear (31) and a worm gear shaft (28) which are matched with each other are arranged in the worm gear box body (30); the worm wheel (31) is sleeved outside the guide post (14) in a sliding manner, 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 the adjusting servo motor (25) through a coupling sleeve and a key, the adjusting servo motor (25) is fixed on the motor support (26), and the motor support (26) is installed on the power box body (32).

5. The four-point distributed modular combined bottom drive press according to claim 3 or 4, characterized in that: the power box mechanism (7) comprises a crankshaft (21), a ball head 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 matched and connected with the lower ball bowl (15) and the upper ball bowl (16), and one end, far away from the ball head, of the ball head connecting rod (19) is rotatably connected with the crankshaft (21); 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); the output shaft of the speed reducer (23) is connected with the 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).

6. The four-point distributed modular combination bottom drive press of claim 2, wherein: the upper cross beam (2), the upright post (3) and the lower cross beam (6) are fixedly connected with a screw through a square key (43), 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 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.

7. The four-point distributed modular combination bottom drive press of 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 rulers (41) are fixed on the upright posts (3) in a one-to-one correspondence mode, and the magnetic heads (42) are fixed on the positions, corresponding to and matched with the magnetic rulers (41), of the side face of the sliding block (4).

8. The four-point distributed modular combination 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 balance frame (39) fixedly connected with the upper cross beam (2), and a control valve block (38), an energy accumulator (36) and a plunger cylinder (37) which is vertically arranged are mounted on the balance frame (39); the control valve block (38) is respectively communicated with the plunger cylinder (37) and the energy accumulator (36) through oil pipes, and the control valve block (38) is also communicated with an 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 pillar (47) and a frame bottom plate (49); the frame bottom plate (49) is connected and installed on the upper cross beam (2) through bolts; the plunger cylinder (37) is connected and installed on the plunger cylinder seat (50) through a bolt; the control valve block (38) is installed on the valve block bracket (48) through bolt connection; the energy accumulator (36) is fixed on one side of the energy accumulator support (47) through a supporting plate (51) and a hoop (52).

9. The four-point distributed modular combination bottom drive press according to claims 1 to 8, characterized in that: 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); and a ground rail lifting car (55) used for moving the power box mechanism (7) out of or into the lower cross beam (6) is installed on the light rail (54).

10. The four-point distributed modular combined bottom drive press according to claims 1 to 3, characterized in that: the power box mechanism (7) is replaced by a hydraulic cylinder mechanism module (56).

Technical Field

The invention relates to the technical field of forging equipment, in particular to a four-point distributed modular combined bottom drive press.

Background

Along with the development of industrial products such as automobile and household appliances to 'multi-variety and small-batch', a matched stamping factory production line is changed, a single-process die is integrated to a multi-station die, a mechanical arm, a robot and the like are widely applied to an automatic stamping line, the requirements on a working table top of stamping equipment are increasingly wide, the tonnage is increasingly large, the stamping frequency is increasingly high, the stability is increasingly good, and the special requirements on the market of a press machine are increasingly ordered.

The bottom drive press is one of the existing presses, such as a bottom drive press structure (CN 206690587U) disclosed in chinese patent; the crankshaft assembly machine comprises a base, wherein a workbench is arranged on the base, a sliding block is arranged above the workbench, guide pillars are fixedly connected to the lower portion of the sliding block, the base is a closed box body, through holes are formed in the workbench corresponding to the guide pillars, the guide pillars penetrate through the corresponding through holes and then extend downwards into the base, supporting holes for horizontally mounting 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 pillar is in transmission connection with the upper end of the connecting rod through a transmission block; one end of the crankshaft horizontally extending out of the base is in transmission connection with the driving mechanism. The workbench is provided with a stand column, the upper end of the stand column is fixed with a top plate, a balance cylinder is installed on the top plate, and the extending end of a piston rod of the balance cylinder is connected with a sliding block through a hanging block.

The technology has the following defects:

first, adopt traditional end transmission press final drive mode of structure, a transmission shaft + both sides crank link mechanism packs drive mechanism into the base, and the defect of this mode has: the assembly and maintenance are difficult, the working table surface and the nominal tonnage are not suitable to be large, and the feeding and discharging can not be realized due to the arrangement of the connecting rods on the two sides of the working table; the offsetting mechanism of the eccentric force of the crank connecting rod is lacked, the opening is not suitable for being large, and the punching frequency is not suitable for being high;

secondly, a closed height automatic adjusting mechanism is not provided, so that the die matching is inconvenient, and the universality of the bottom transmission press machine is influenced;

thirdly, for a special ordered press machine, the size of the press machine needs to be designed again, the production and manufacturing organization difficulty of a single press machine is large, the period is long, the cost is high, and a large pressure is formed for a press machine manufacturer which is used to batch production.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a four-point distributed modular combined bottom drive press. The four-point distributed power system is adopted, namely four discrete servo motors are used for driving the power box module of the crank link mechanism and share a set of master control driver system to realize combined driving, and design targets of high stroke frequency, large table surface, large tonnage, large opening and the like are realized in a mode of mutually offsetting eccentric forces in the horizontal direction of four small horse-drawn carriages.

In order to achieve the purpose, the invention adopts the technical scheme that: a four-point distributed modular combined bottom transmission press comprises an upper cross beam and a lower cross beam, wherein an upright post is connected between the upper cross beam and the lower cross beam; the sliding block is slidably arranged on the upright post; the power box mechanism is connected with the sliding block through a pull rod nut mechanism with adjustable height; and a magnetic scale mechanism is arranged between the sliding block and the upright post.

It further comprises the following steps: the 4 power box mechanisms are arranged in a central symmetry mode through lower cross beams; the power box mechanism is fixed below the lower cross beam through a cylindrical pin and a screw; the number of the upright posts is four, and the four upright posts are arranged below the cross beam in a central symmetry manner.

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 an integral nut and a split nut; the power output end of the power box mechanism is a guide pillar which is 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 thread 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 used 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 a worm gear shaft which are matched with each other are arranged in the worm gear box body; the worm wheel is sleeved outside the guide pillar in a sliding mode, and the worm wheel is connected with the guide pillar through a sliding key; the input end of the worm wheel shaft is connected with an adjusting servo motor through a coupling sleeve and a key, the adjusting servo motor is fixed on a motor support, and the motor support is installed 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 matched and connected with the lower ball bowl and the upper ball bowl, and one end of the ball head connecting rod, which is far away from the ball head, is rotatably connected with the crankshaft; 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; and 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 a square key and a screw, 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 manner.

The number of the magnetic scale mechanisms is four, and the magnetic scale mechanisms comprise magnetic scales and magnetic heads; the magnetic rulers are fixed on the upright posts in a one-to-one correspondence manner, and the magnetic heads are fixed on the positions, corresponding to and matched with the magnetic rulers, of the side faces of the sliding blocks.

Two sides of the upper cross 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 the balancer frame is provided with a control valve block, an energy accumulator and a plunger cylinder which is vertically arranged; the control valve block is respectively communicated with the plunger cylinder and the energy accumulator through an oil pipe, and is also communicated with an 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, and the connecting block 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 installed 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 connected and installed on the valve block bracket through a bolt; the energy accumulator is fixed on one side of the energy accumulator support through the supporting plate and the hoop.

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 car 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 invention has the beneficial effects that:

1. the press machine adopts a modular combined structure;

the power mechanism of the press machine is designed into a four-point distributed power system, namely four power box component modules with the same structure, a lower cross beam module, a sliding block module, a pull rod module, an upright column module, an upper cross beam module and the like. The bottom transmission press machine with different parameters such as tonnage, stroke, working table surface 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 discrete servo motors are used for driving a crank link mechanism (power box), a set of master control driver system is shared to realize joint driving, and a mode of 'four small horse drawing big vehicle' is adopted. Compared with the press machine transmission mechanism with the same tonnage, the mode has the advantages that the pressure (pulling force) output by each power box is only one fourth, the design and manufacture difficulty is obviously reduced, and the cost is reduced.

3. The four separated power boxes can offset the horizontal eccentric inertia component force pairwise, so that the running stability is improved;

four separated power boxes (servo motors drive the crank link mechanisms) are used, a set of master control driver system is shared to realize combined drive, and the crank link mechanisms which are symmetrically arranged in pairs can adopt two crankshafts to reversely and synchronously rotate during operation, so that horizontal eccentric inertia component forces of the crank link mechanisms are mutually offset, and the requirements of high stroke frequency and stable operation of the press machine are further met.

4. The press machine is convenient to manufacture and maintain;

four separate servo motors drive a crank link mechanism (a power box mechanism), and the modular design is adopted, so that the structure is completely consistent and interchangeable; every servo motor drive crank link mechanism etc. assemble on the headstock, constitute integratively, accessible ground rail lift truck shifts out the bottom end rail, then hangs out the pit with the workshop driving and maintains, has overcome the inconvenient shortcoming of assembling and maintaining of traditional end transmission press.

5. The slider closed height mechanism is arranged on the power box, so that the movement inertia of the slider is reduced;

the four power box components are provided with crank connecting rod closed height adjusting mechanisms driven by independent servo motors; through the control of a master control system, the four discrete mechanisms can act synchronously to complete the function of adjusting the sealing height of the sliding block. The slide block closed height mechanism is arranged on the power box, so that the motion inertia of the slide block is reduced, and the operation stability of the press machine is improved.

6. The sliding block not only can realize automatic adjustment of the sealing height, but also has the function of four-point leveling;

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 scale fixed on the upright column, so that the automatic adjustment of the closed height is realized;

the four-point distributed crank connecting rod closed height adjusting mechanism can also be independently controlled through a master control system, each discrete servo motor is independently driven, and the four-point leveling function of the sliding block is completed by means of data fed back by the magnetic ruler fixed on the corresponding upright post.

7. The slide block not only has the overload protection function, but also has the unbalance loading overload protection function;

the driving servo motor of the crank connecting rod mechanism of the four-point distributed power box has the overload protection function; and the overload protection value of the sliding block is the sum of the overload protection values of the four separated servo motors. When the slide block needs to be subjected to unbalance loading overload protection, only one section of program needs to be added to the master control system, the current difference values of the four driving servo motors are set and detected, and when the current difference values exceed the set values, the shutdown protection is carried out.

8. The eccentric load bearing capacity of the sliding block is enhanced;

the force application point of the sliding block is improved from two points on two sides of the traditional bottom transmission press machine to four points on four corners, so that the load rigidity of the sliding block is improved, and particularly the eccentric load resistance is improved.

9. The taboo that the bottom transmission press machine cannot feed in the left and right directions is broken through;

the force application point of the slide block is improved from two points on two sides of the traditional bottom transmission press machine to four points on four corners, and then the space of the original connecting rod mechanism arranged on the side opening of the machine tool is released, so that the materials (a mold or a moving platform) can be fed and discharged in and out in the left and right directions.

10. The upright columns and the upper cross beam basically do not bear working load, light weight design can be carried out, and weight and manufacturing cost are reduced.

11. After vibration damping cushions are additionally arranged on four feet of the lower cross beam, vibration energy of the press can be absorbed, and the press is suitable for being designed into a large-stroke and rapid press, and the application field of a bottom-drive 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 the present invention;

FIG. 4 is a bottom view of the present invention;

FIG. 5 is a perspective view of an embodiment of the present invention;

FIG. 6 is a schematic view of a motor according to an embodiment of the present invention (A-A cross section)

FIG. 7 is a front view of a power box assembly according to one embodiment of the present invention;

FIG. 8 is a left side view of a power box assembly according to one embodiment of the present invention;

FIG. 9 is a top view of a power box assembly according to one embodiment of the present invention;

FIG. 10 is a cross-sectional view of a power box component in accordance with one embodiment of the present invention (cross-sectional view B-B);

FIG. 11 is an enlarged view of a column rail and a block rail according to an embodiment of the present invention;

FIG. 12 is an enlarged view of the balance cylinder mechanism according to the first embodiment of the present invention;

FIG. 13 is a view of a ground rail lift car in a pit according to one 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 slide 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. a whole nut 12, a split nut 13, a pull rod 14, a guide post 15, a lower ball bowl 16, an upper ball bowl 17, an upper ball bowl gland 18, a rear bearing seat 19, a ball head connecting rod 20, a connecting rod cap 21 and a 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. a worm shaft coupling sleeve 29, a sliding key 30, a worm gear box gland 31, a worm gear 32, a worm gear box body 33, an oil pool plate 34, a front supporting seat 35 and a crankshaft coupling sleeve,

36. the hydraulic control system 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, a square key, 44, a sliding block guide rail, 45, a fixing block, 46, a rectangular right-angle guide rail, 47, an energy accumulator support, 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 lifting vehicle, 56 and a hydraulic cylinder mechanism.

Detailed Description

The invention will be further explained with reference to the drawings.

Example one

Referring to fig. 1 to 5, a four-point distributed modular combined bottom drive press comprises a split frame, an upper cross beam 2, a lower cross beam 6 and four upright posts 3, wherein the four upright posts 3 are arranged in a rectangular shape, and the upper cross beam 2, the upright posts 3 and the lower cross beam 6 are fixedly connected through square keys 43 and screws. The slide block 4 is vertically and slidably mounted on the upright post 3, and the lower beam 6 is fixed with a working table plate 5 opposite to the slide block 4. Power box mechanisms 7 with the same structure are fixed below four corners of the lower cross beam 6 respectively, the upper ends of the power box mechanisms 7 are connected with vertically arranged pull rod nut mechanisms 9, and the upper ends of the pull rod nut mechanisms 9 are connected with the sliding blocks 4. Magnetic scale mechanisms 10 are arranged at four corners of the upright post 3 and the sliding block 4.

Referring to fig. 6 again, the pull rod nut mechanism 9 includes a pull rod 13, the pull rod 13 is vertically disposed, and the pull rod 13 is fixed to the slider 4 through an integral nut 11 and a 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 thread fit. The pull rod 13 and the slide block 4 are connected by adopting split nuts, which is mainly convenient for assembly and can reduce the cost by reducing the design of a step shaft of the pull rod.

Referring to fig. 7 to 10, 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 connecting rod 19, a connecting rod cap 20, and the like. The lower ball bowl 15 and the upper ball bowl 16 are arranged below 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 a crankshaft 21 through a connecting rod cover 20. Crankshaft 21 is mounted on power case 22 via front bearing holder 33 and rear bearing holder 18 which are movably fitted. 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 installed on the power box body 32, and mainly when the eccentricity of the crankshaft is too large, the assembling process holes of the crankshaft on the power box body are required to be correspondingly enlarged, and the design and manufacturing cost is increased. The crankshaft is connected with the detachable supporting seat and is installed on the power box body, and 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 case mechanism 27 includes a worm wheel 31, a worm wheel shaft 28, a worm gear case cover 30, and the like. The worm wheel 31 and the worm wheel shaft 28 are arranged in a worm wheel box body 30, and the worm wheel box body 30 is arranged on a power box body 32. The sliding key 29 is arranged in a hole groove of the worm wheel 31, the guide post 14 slides in a guide hole of the power box body 32, and a key groove of the guide post 14 is matched with the sliding key 29 to slide vertically. 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 adjusting servo motor 25 is fixed on the motor bracket 26, and the motor bracket 26 is arranged on the power box body 32. The worm gear box mechanism is selectively designed on the power box body instead of the sliding block, and the problems that the sliding block structure is too complex and the weight is increased, so that the inertia force is increased and the operation stability of the press machine is influenced are mainly avoided.

Referring to fig. 11 and 12, two sides of the upper beam 2 are respectively fixed with a balance cylinder mechanism 1;

the balance cylinder mechanism 1 comprises a balance frame 39 fixedly connected with the upper cross beam 2, and the balance frame 39 is formed by welding or casting a plunger cylinder seat 50, a valve block bracket 48, an energy accumulator pillar 47 and a frame bottom plate 49. The balancer frame 39 adopts a modular integrated design, and can be assembled after the balancing cylinder mechanism is independently assembled, so that the assembly and disassembly are convenient, and the maintainability is good. The frame bottom plate 49 is installed on the upper cross beam 2 through bolt connection; the plunger cylinder 37 is installed on the plunger cylinder seat 50 through bolt connection; the control valve block 38 is mounted on the valve block bracket 48 by bolting; the energy accumulator 36 is fixed on one side of the energy accumulator support 47 through a support plate 51 and an anchor ear 52. The control valve block 38 is respectively communicated with the plunger cylinder 37 and the energy accumulator 36 through oil pipes, and the control valve block 38 is also communicated with an 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 and the accumulator 36 form a hydraulic spring, which exerts a hydraulic spring force on a coupling block 40 fixed to the slide block via the plunger cylinder piston rod.

The plunger cylinder, the valve block, the energy accumulator and the like of the balance cylinder mechanism form a hydraulic spring, hydraulic pulling force which is larger than the weight of the sliding block component and is approximately constant value acts on the connecting block through a plunger cylinder piston rod, the connecting block is fixed on two sides of the sliding block, and the sliding block component is pulled upwards until the thread tooth surfaces of the pull rod 13 and the guide pillar 14 are contacted and attached firmly, so that the aims of eliminating the axial clearance of the thread and improving the repeated positioning precision of the bottom dead center of the sliding block are fulfilled.

Referring to fig. 11, the column guide rail 8 is disposed on the inner side of the column 3, the column 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 column 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 rail 44 is vertically matched with a rectangular right-angle guide rail 46 in a sliding way. The fixed block 45 is provided with a screw for adjustment, and the screw can be used for adjusting the clearance between the rectangular right-angle guide rail 46 and the friction pair of the slide block guide rail 44 on the slide block 4, so that the slide block can slide up and down along the direction of the rectangular right-angle guide rail.

As shown in fig. 11, the magnetic scale mechanism 10 includes four magnetic scales 41 and magnetic heads 42. The magnetic scale 41 is fixed on the upright post 3, and the magnetic head 42 is correspondingly fixed on the side surface of the sliding block 4 and vertically slides along with the sliding block 4 in the upright post 3. Magnetic scale mechanisms 10 are arranged at four corners of the sliding block 4, and the main purpose is to measure the accurate distance between each corner of the sliding block and the upper plane of the working table plate in real time, feed back a master control system, achieve the automatic leveling target of the four corners of the sliding block and meet the functional requirements of automatic mold adjustment.

As shown in fig. 13, a light rail 54 is embedded in the foundation installation pit 53; the power box mechanism 7 can move out of or into the lower beam 6 by the ground rail lift truck 55. Then the press is lifted out of the pit for maintenance by a workshop travelling crane, and the defect that the traditional bottom transmission press is inconvenient to assemble and maintain is overcome.

The working principle is as follows:

the operation principle of the press machine is as follows:

and when the operation start button of the press is pressed, the master control system sends a signal to main servo motor drivers of the four power box mechanisms, and two main servo motors rotate forwards and rotate backwards synchronously. As shown in FIG. 6, the main servo motors of the power box mechanisms are symmetrically arranged in the front-back direction of the press, and the front one rotates forwards, the back one rotates backwards synchronously, or vice versa. The purpose of synchronous reverse rotation is to offset the eccentric inertia force of the crank connecting rod mechanism in the horizontal direction and improve the operation stability of the machine tool.

The transmission process is as follows: 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 connecting rod 19 and the connecting rod cover 20 to push the guide pillar 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 complete the slide block stamping process.

Compared with the traditional bottom transmission press machine, the design idea that a transmission shaft and crank connecting rod 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 slide block and the power box mechanism modules with the same structure are fixed below the four corners of the lower cross beam is adopted, and a series of defects that the traditional bottom transmission press machine is difficult to assemble and maintain, the working table top and the nominal tonnage are not suitable for being large, feeding and discharging cannot be carried out due to arrangement of the connecting rods on two sides of the working table, and an opening is not suitable for being large when the crank connecting rod does not have an eccentric force counteracting mechanism, the stroke frequency is not suitable for being 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) and a set of master control driver system are shared to realize combined drive, and a mode of 'four small horse drawing cart' is adopted. Compared with the press machine transmission mechanism with the same tonnage, the mode has the advantages that the pressure (pulling force) output by each power box mechanism is only one fourth, the design and manufacture difficulty is obviously reduced, and the cost is reduced.

Moreover, the four-point distributed modular combined bottom transmission press machine disclosed by the invention is also a servo mechanical press machine, and can be used for carrying out programming control on displacement, pressure and speed operation curves of the slide block to meet the functional requirements of the servo press machine.

And finally, adjusting the sealing height of the sliding block: a four-point distributed power box worm and worm wheel 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 scale fixed on an upright post, so that the automatic adjustment of the closed height is realized. The four-point distributed closed height adjusting mechanism can also be independently controlled through a master control system, each discrete servo motor is independently driven, and the four-point leveling function of the sliding block is completed by means of data fed back by the magnetic ruler fixed on the corresponding upright post.

Example two

As shown in fig. 14 and fig. 15, the difference between the second embodiment and the first embodiment is:

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.