Large-stroke multi-connecting-rod mechanical press

Abstract

The invention relates to the technical field of mechanical presses, and discloses a large-stroke multi-connecting-rod mechanical press which comprises a box girder, an end cover is fixed to the upper end of the box girder through bolts, a motor base for installing a driving motor is arranged at the upper end of the end cover, the large-stroke multi-connecting-rod mechanical press further comprises a partition plate, and the side wall of the partition plate is rotationally connected with two shaft pins and two main shafts. The multi-connecting-rod transmission mechanisms are installed on the shaft walls of the two pin shafts, transmission of the multi-connecting-rod transmission mechanisms is achieved through rhombic structures, the rhombic structures are deformed by changing the vertical position of one hinge point, and the multi-connecting-rod transmission mechanisms drive the guide columns to enable the sliding blocks to move in a reciprocating mode to conduct punching work on workpieces. According to the large-stroke multi-connecting-rod mechanical press, the multi-connecting-rod mechanical press can be driven by a single main motor, meanwhile, the multi-stage speed-reducing and torque-increasing gear set is adopted for accurate driving, the control difficulty is lowered, the good lubricating performance is achieved, and the loss of mechanical parts of the press is reduced to the minimum.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical press, in particular to a large-stroke multi-link mechanical press. BACKGROUND

[0002] The press is a widely used forging equipment in the field of metal forming, and there are various types and quantities, among which the mechanical press is the most widely used. The traditional mechanical press generally adopts various mechanical transmission mechanisms such as crank connecting rod, multi-link or non-circular gear mechanism and appropriate component size to obtain the required sliding block motion law of the process, but when the mechanism type and component size are determined, the motion characteristics of the sliding block are also determined, so it does not have flexibility and is difficult to be used for different stamping processes. The numerical control servo press is driven by a servo motor to roll a ball screw or a crank, and the motion is converted into the required motion of the sliding block through a multi-link mechanism, which can very conveniently change the motion law of the sliding block and is suitable for different stamping processes. Since the servo press does not store energy to overcome the forming pressure required when forging a workpiece, in order to achieve a larger nominal pressure value, a transmission mechanism such as a toggle lever mechanism is often used to achieve a certain force amplification effect. Due to the limitation of the power and output torque of the servo motor, although the toggle lever mechanism has a large force amplification ratio, it is difficult to construct a large-tonnage press by single-motor driving mode.

[0003] The press in the prior art is usually composed of two toggle levers and a single connecting rod, which has certain limitations in reducing the torque of the main motor and the force amplification structure. Although the symmetrical toggle lever and the triangular connecting rod can improve the overall structure and effectively reduce the wear of the sliding block guide rail, synchronous control requires multiple main motors for driving, which is relatively troublesome and easy to cause motion interference and abnormal wear. Therefore, the technical scheme provides a multi-link mechanical press which can be driven by a single main motor, and a multi-stage speed reduction and torque amplification gear set is used for accurate driving, which reduces the control difficulty and also has good lubrication performance, so that the wear of the mechanical parts of the press is minimized. SUMMARY

[0004] TECHNICAL PROBLEM

[0005] In view of the deficiencies of the prior art, the present application provides a large-stroke multi-link mechanical press, which solves the problem that the press in the prior art is usually composed of two toggle levers and a single connecting rod, which has certain limitations in reducing the torque of the main motor and the force amplification structure. Although the symmetrical toggle lever and the triangular connecting rod can improve the overall structure and effectively reduce the wear of the sliding block guide rail, synchronous control requires multiple main motors for driving, which is relatively troublesome and easy to cause motion interference and abnormal wear.

[0006] TECHNICAL SCHEME

[0007] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: a large-stroke multi-link mechanical press, comprising a box girder, an end cover is fixed on the upper end of the box girder through bolts, the upper end of the end cover is provided with a motor seat for installing a driving motor, further comprising:

[0008] A partition plate, the side wall of the partition plate is rotatably connected with two shaft pins and two main shafts, a multi-link transmission mechanism is installed on the shaft wall of each of the two pin shafts, the multi-link transmission mechanism realizes transmission in a rhombus structure, and the rhombus structure is deformed by changing the vertical position of one of the hinged points, so that the multi-link driving mechanism drives the guide column to reciprocate to move the sliding block to perform stamping work on the workpiece;

[0009] A driving mechanism, the driving mechanism adopts a herringbone gear to synchronously drive a tooth ring to make the multi-link transmission mechanism work to drive the guide column to reciprocate;

[0010] A lubricating system, the lubricating system uses an external oil pump to deliver lubricating oil to the driving mechanism, and can also deliver lubricating oil to the movable hinged part of the multi-link transmission mechanism through a sealing end cap, so as to realize efficient lubrication of the meshing parts of the multiple teeth of the driving mechanism, and an oil collecting groove is installed at the bottom of the box girder;

[0011] A sliding sleeve, the sliding sleeve is fixed at the bottom of the box girder and is sleeved with the guide column, a lubricating oil channel is arranged in the sliding sleeve, and an oil inlet joint is installed on one side of the sliding sleeve, so that the lubricating system supplies oil to form an oil film at the sleeving part of the sliding sleeve and the guide column, thereby reducing the mechanical eccentric wear between the guide column and the sliding sleeve during reciprocation.

[0012] As a further description of the above technical scheme, the multi-link transmission mechanism comprises a shaft sleeve sleeved on the shaft pin, the side wall of the shaft sleeve is welded with an upper rocker arm and a lower rocker arm, the upper rocker arm and the lower rocker arm share a rocker arm, the upper rocker arm and the rocker arm are rotatably connected with an upper pull rod through a first hinged shaft, a circular ring is arranged at one end of the upper pull rod, an eccentric body is sleeved in the circular ring, the lower rocker arm and the rocker arm are rotatably connected with a lower pull rod through a second hinged shaft, a tripod is rotatably connected between the lower pull rod and the upper pull rod through a third hinged shaft, two tripods are arranged, and a ring-shaped connecting part is arranged at one of the sharp corners of the tripod, the connecting part and the circular ring of the upper pull rod are jointly sleeved on the side wall of the eccentric body, a brake lever is rotatably connected to the tripod through a fourth hinged shaft, the lower end of the brake lever is rotatably connected to the upper end of the guide column through a fifth hinged shaft, and the first hinged shaft, the second hinged shaft, the third hinged shaft and the pin shaft jointly form four top corners of the rhombus structure of the multi-link transmission mechanism;

[0013] One end of the eccentric body is fixedly connected with a rotating disc arranged eccentrically, one side of the rotating disc is fixedly connected with the tooth ring through bolts, one side of the rotating disc is sleeved with the positioning flange of the tooth ring, the center of the rotating disc is fixedly connected with the main shaft through the round hole and the interference plus key connection of the shaft wall of the eccentric body, the shaft pin and the main shaft are rotatably connected to the inner side of the box girder through spherical roller bearings, and the middle part of the shaft pin is rotatably connected to the partition plate through a ball bearing.

[0014] As a further description of the above technical scheme, the side wall of the eccentric body is fixedly connected with a positioning ring, one side of the upper pull rod is in contact with the positioning ring during assembly, and a spacer ring sleeved with the eccentric body is arranged between the upper pull rod and the tripod. One side of the tripod is slidably provided with a limiting ring sleeved with the eccentric body, and the limiting ring is fixedly connected with one side of the eccentric body through bolts. The shaft wall of the main shaft is provided with a clamping groove in the circumferential direction. Two semicircular locking blocks are clamped in the clamping groove. The locking blocks are fixed on the main shaft by bolts to limit the axial movement of the eccentric block.

[0015] As a further description of the above technical scheme, the main shaft and the shaft pin are both hollow shafts with different diameters, and one end is a sealing structure. Two oil passing holes are formed in the shaft wall of the main shaft and the shaft pin, and the positions of the oil passing holes correspond to the positions of the tripod and the shaft sleeve. An oil passing channel corresponding to the position of the oil passing hole in the shaft wall of the main shaft is formed in the side wall of the eccentric body. A plurality of sealing end covers are arranged and fixed on the box girder by bolts, and the positions of the opening ends of the main shaft and the shaft pin correspond. One side of the sealing end cover is provided with an oil pipe joint connected to the oil supply of the hydraulic system.

[0016] As a further description of the above technical scheme, the side wall of the eccentric body is provided with an oil distribution ring, the oil distribution ring is in communication with the oil passing channel, a plurality of flow guide grooves are formed on both sides of the oil distribution ring, the lengths of the flow guide grooves on both sides are less than the thickness of the tripod, the assembly gap between the shaft pin and the shaft sleeve is 0.15mm-0.30mm, and the assembly gap between the tripod, the upper pull rod and the eccentric body is 0.15mm-0.30mm, so as to form an oil film with sufficient thickness.

[0017] As a further description of the above technical scheme, the driving mechanism includes two driving shafts, the herringbone gears are provided with two gears meshing with each other, and the herringbone gears are fixedly connected to the shaft wall of the driving shaft. One side of one of the herringbone gears is meshed with a pinion, the center of the pinion is fixedly connected with an input shaft, the input shaft and the driving shaft are rotatably connected in the box girder through roller bearings, two straight tooth parts are arranged on the shaft wall of the driving shaft, and the straight tooth parts are meshed with the tooth ring. The side wall of the partition plate is provided with a notch, the lowest part of the notch is lower than the lower end of the pinion, and the width of the notch is greater than the two herringbone gears.

[0018] One end of the input shaft passes through the roller bearing and is sleeved with a belt pulley, one end of the input shaft is provided with a threaded column, and a lock nut is threadedly connected on the threaded column.

[0019] As a further description of the above technical scheme, the lubricating system comprises an oil pump, an oil inlet pipe is arranged on the input end of the oil pump, one end of the oil inlet pipe extends into the box girder and extends into the oil collecting groove, an oil outlet pipe is fixedly connected to the output end of the oil pump, a guide pipe is fixedly connected to the pipe wall of the oil outlet pipe, a plurality of sealing end caps are connected in series through H-shaped pipes, the guide pipe is fixedly connected to one side of one of the sealing end caps, an oil injection pipe extending into the box girder is fixedly connected to the pipe wall of the H-shaped pipe, and a plurality of oil injection nozzles facing the driving mechanism are fixedly connected to the pipe wall of the oil injection pipe.

[0020] As a further description of the above technical scheme, the pipe wall of the oil outlet pipe is fixedly connected with a T-shaped oil pipe, the T-shaped oil pipe extends into the box girder and is fixedly connected with a distribution pipe at both ends, and the two distribution pipes are respectively communicated with the lubricating oil channels in the sliding sleeve.

[0021] As a further description of the above technical scheme, the lubricating oil channel is annularly arranged in the sliding sleeve, the sliding sleeve is provided with a grid structure oil storage groove, the oil storage groove is composed of a plurality of spiral grooves with opposite spiral directions, one side of the sliding sleeve is connected with an oil inlet joint through a threaded hole, the lower end of the sliding sleeve is provided with an expanded portion at the opening, a scraping ring is arranged in the expanded portion and sleeved with a guide column, a locking ring is threadedly connected in the expanded portion and abuts against the scraping ring, and a plurality of rubber rings are sleeved in the locking ring.

[0022] As a further description of the above technical scheme, the guide column is a hollow pipe, the side wall of the guide column is provided with an air inlet and an air outlet, an air source joint is arranged at the air inlet, a flange plate is fixedly connected to the lower end of the guide column, and an articulated seat connected with the multi-link driving mechanism is fixedly connected to the upper end of the guide column, so that the two ends of the guide column are sealed through the flange plate and the articulated seat, and the airflow is directed to pass through the heat dissipation channel formed in the guide column.

[0023] Advantages

[0024] Compared with the prior art, the present application provides a large-stroke multi-link mechanical press, which has the following advantages:

[0025] 1. The multi-link transmission mechanism realizes transmission in a diamond structure, and the diamond structure is deformed by changing the vertical position of one of the hinge points, so that the multi-link driving mechanism drives the guide column to reciprocate the sliding block to perform stamping work on the workpiece, and the press machine can realize single main motor driving multi-link mechanical press machine, and the multi-stage speed reduction and torque increasing gear set is used for accurate driving, which reduces the control difficulty, and also has good lubrication performance, so that the wear of mechanical parts of the press machine is minimized.

[0026] 2. When the pulley is driven by the main motor, the input shaft acts as the first stage speed reduction shaft and drives one of the herringbone gears through the pinion, at this time the other meshing herringbone gear can realize reverse rotation at the same speed, at this time the straight tooth part on the driving shaft can drive the gear ring to rotate, and can realize the second stage speed reduction effect, at this time the gear ring rotates around the shaft pin as the center and drives the eccentric body to do eccentric motion, the eccentric body moves to change the position and angle of the hinge between the upper pull rod and the tripod, so that the diamond structure of the multi-link transmission mechanism can be changed, the displacement of the tripod can drive the brake lever to make the guide column reciprocate, so that the large stroke movement of the guide column can be realized.

[0027] 3. The air inlet and air outlet are arranged on the side wall of the guide column, the air inlet is provided with an air source connector, the lower end of the guide column is fixedly connected with a flange plate, and the upper end of the guide column is fixedly connected with a hinge seat connected with the multi-link transmission mechanism. The flange plate and the hinge seat realize sealing of both ends of the guide column, so that the airflow passes through the inside of the guide column to form a heat dissipation channel, at this time the temperature of the guide column can be controlled and reasonably cooled by high-speed airflow, and the abrasion speed between the guide column and the sliding sleeve is increased due to the thermal expansion of the guide column. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The structure diagram of the large-stroke multi-link mechanical press machine is provided.

[0029] Figure 2 The internal structure diagram of the box girder in the large-stroke multi-link mechanical press machine is provided. Figure 1 ;

[0030] Figure 3 The internal structure diagram of the box girder in the large-stroke multi-link mechanical press machine is provided. Figure 2 ;

[0031] Figure 4 The front view of the large-stroke multi-link mechanical press machine is provided. Figure 2

[0032] Figure 5 ​A structure diagram of a multi-link transmission mechanism in a large-stroke multi-link mechanical press according to the present application Figure 1 ;

[0033] Figure 6 A front view of a large-stroke multi-link mechanical press according to the present application Figure 5 ;

[0034] Figure 7 A structure diagram of a multi-link transmission mechanism in a large-stroke multi-link mechanical press according to the present application Figure 2 ;

[0035] Figure 8 A structure diagram of a multi-link transmission mechanism in a large-stroke multi-link mechanical press according to the present application Figure 3 ;

[0036] Figure 9 A structure diagram of a rotating disc and an eccentric body in a large-stroke multi-link mechanical press according to the present application

[0037] Figure 10 A structure diagram of a driving mechanism in a large-stroke multi-link mechanical press according to the present application

[0038] Figure 11 A structure diagram of a lubricating system in a large-stroke multi-link mechanical press according to the present application

[0039] Figure 12 An internal structure diagram of a sliding sleeve and a guide column in a large-stroke multi-link mechanical press according to the present application

[0040] Figure 13 A mounting structure diagram of a box girder in a large-stroke multi-link mechanical press according to the present application (the dotted line part is a stand A, a sliding block B, a T-shaped double moving workbench C, a lower die D and an upper die E)

[0041] Figure 14 A rear view of a large-stroke multi-link mechanical press according to the present application Figure 1 .

[0042] In the diagram: 1. Box girder; 2. Pulley; 3. Flange; 4. End cover; 5. Guide post; 6. Gear ring; 7. Turntable; 8. Straight gear section; 9. Drive shaft; 10. Injection pipe; 11. Herringbone gear; 12. Upper tie rod; 13. Shaft pin; 14. Rocker arm; 15. Lower tie rod; 16. Tripod; 17. Brake lever; 18. Sliding sleeve; 19. T-shaped oil pipe; 20. Oil collection trough; 21. Baffle plate; 22. Input shaft 23. Spindle; 24. Oil passage hole; 25. Locking block; 26. Eccentric body; 27. H-shaped tube; 28. Positioning ring; 29. ​​Washer ring; 30. Limiting ring; 31. Slot; 32. Oil distribution ring; 33. Guide groove; 34. Pinion; 35. Sealing end cap; 36. Oil pump; 37. Oil injector; 38. Oil reservoir; 39. Lubricating oil channel; 40. Oil scraper ring; 41. Locking ring; 42. Heat dissipation channel. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] See attached document Figures 1-14 The present invention provides a large-stroke multi-link mechanical press, which mainly consists of two parts: mechanical structure and electrical control. The mechanical structure of this press mainly consists of main drive, machine body, slide block, air cushion, moving worktable and other auxiliary structures (in... Figure 13 (Not shown in the image), the electrical control section includes air ducts ( Figure 13 The main innovation of this technical solution is that the main drive structure is installed inside the box girder 1. An end cover 4 is fixed to the upper end of the box girder 1 by bolts. A motor mount for the drive motor is set on the upper end of the end cover 4. The drive motor uses small pulleys to drive belts (4 or more) to drive large pulleys 2 to achieve a first-stage speed reduction and torque increase transmission. The specific technical solution also includes:

[0045] The partition plate 21 is fixedly installed inside the box girder 1. The side wall of the partition plate 21 is rotatably connected to two shaft pins 13 and two main shafts 23. A multi-link transmission mechanism is installed on the shaft wall of each of the two pins. The multi-link transmission mechanism realizes transmission with a rhombic structure. By changing the vertical position of one of the hinge points, the rhombic structure is deformed, so that the multi-link drive mechanism drives the guide column 5 to make the slider reciprocate to perform stamping work on the workpiece.

[0046] The driving mechanism is installed on the box girder 1 and the partition plate 21, and the driving mechanism adopts the herringbone gear 11 to synchronously drive the gear ring 6 to make the multi-linkage transmission mechanism work to drive the guide column 5 to make reciprocating motion.

[0047] The lubricating system is installed on the box girder 1, and the lubricating system uses the external oil pump 36 to deliver the lubricating oil to the driving mechanism, and can also deliver the lubricating oil to the movable hinged part of the multi-linkage transmission mechanism through the sealing end cap 35, so as to realize efficient lubrication of the meshing parts of the driving mechanism, and the oil collecting groove 20 is installed at the bottom of the box girder 1.

[0048] As can be seen from the above, compared with the press in the prior art which is composed of two toggle levers and a single linkage, the torque of the main motor and the force increasing structure have certain limitations, and although the symmetrical toggle lever and the triangular linkage can improve the overall structure and effectively reduce the wear of the slide guide, the synchronous control needs to be driven by multiple main motors, the control process is relatively troublesome, and the abnormal wear phenomenon may be caused by motion interference. The press provided by the technical scheme can realize the driving of the multi-linkage mechanical press by a single main motor, and adopts a multi-stage speed reduction and torque increasing gear set for precise driving, thereby reducing the control difficulty and also having good lubricating performance, so that the wear of the mechanical parts of the press is minimized.

[0049] The sliding sleeve 18 is sleeved on the guide column 5, and the sliding sleeve 18 is fixed at the bottom of the box girder 1 and is sleeved with the guide column 5, the sliding sleeve 18 is provided with a lubricating oil channel 39, and an oil inlet joint is installed on one side of the sliding sleeve 18, the lubricating oil is supplied by the lubricating system to form an oil film at the sleeving part of the sliding sleeve 18 and the guide column 5, thereby reducing the mechanical eccentric wear between the sliding sleeve 18 and the guide column 5 during reciprocating motion of the guide column 5.

[0050] As the main position of eccentric wear, the stress of the sliding sleeve 18 and the guide column 5 is mainly provided by the thrust of the multi-linkage transmission mechanism above, therefore, the technical scheme designs a structure for active lubrication in the sliding sleeve 18, an oil film is formed by flowing lubricating oil at the stress position, thereby reducing the wear between the sliding sleeve 18 and the guide column 5 and improving the durability of the equipment.

[0051] Specifically, the multi-link transmission mechanism includes a shaft sleeve sleeved on the shaft pin 13, the side wall of the shaft sleeve is welded with an upper rocker arm and a lower rocker arm, the upper rocker arm and the lower rocker arm share a rocker arm 14, the upper rocker arm and the rocker arm 14 are rotatably connected with the upper pull rod 12 through a first hinge shaft, a circular ring is arranged at one end of the upper pull rod 12, the circular ring is sleeved with an eccentric body 26, the lower rocker arm and the rocker arm 14 are rotatably connected with the lower pull rod 15 through a second hinge shaft, the lower pull rod 15 and the upper pull rod 12 are rotatably connected with the tripod 16 through a third hinge shaft, the tripod 16 is provided with two blocks and is provided with a ring-shaped connecting part at one of the sharp corners, the connecting part is sleeved with the circular ring of the upper pull rod 12 on the side wall of the eccentric body 26, the tripod 16 is rotatably connected with the brake lever 17 through a fourth hinge shaft, the lower end of the brake lever 17 is rotatably connected with the upper end of the guide column 5 through a fifth hinge shaft, the first hinge shaft, the second hinge shaft, the third hinge shaft and the pin shaft together form four top corners of a rhombus structure of the multi-link transmission mechanism.

[0052] One end of the eccentric body 26 is fixedly connected with the eccentrically arranged rotating disc 7, one side of the rotating disc 7 is fixedly connected with the gear ring 6 through bolts, one side of the rotating disc 7 is provided with a positioning flange and is sleeved with the inner side of the gear ring 6, the center of the rotating disc 7 is fixedly connected with the eccentric body 26 through a circular hole and the shaft wall of the main shaft 23 in a manner of interference key connection, the two ends of the shaft pin 13 and the main shaft 23 are rotatably connected to the inner side of the box girder 1 through spherical roller bearings, and the middle part of the shaft pin 13 is rotatably connected to the partition plate 21 through a ball bearing.

[0053] The side wall of the eccentric body 26 is fixedly connected with a positioning ring 28, one side of the upper pull rod 12 is in contact with the positioning ring 28 during assembly, a grommet 29 sleeved with the eccentric body 26 is further arranged between the upper pull rod 12 and the tripod 16, one side of the tripod is slidably provided with a limiting ring 30 sleeved with the eccentric body 26, and the limiting ring 30 is fixedly connected with one side of the eccentric body 26 through bolts, the shaft wall of the main shaft 23 is circumferentially provided with a clamping groove 31, two semicircular locking blocks 25 are clamped in the clamping groove 31, and the locking blocks 25 are fixed on the main shaft 23 through bolts to limit the eccentric block from moving in the axial direction.

[0054] The above-mentioned link mechanism can effectively realize the given motion law and motion trajectory, and can well complete the predetermined action, and therefore is widely applied in many fields such as machinery and instruments. Figure 2 and Figure 3As shown in the drawings, eight connecting rods are arranged on both sides of the partition 21. Through the analysis of the working principle and working condition of the eight connecting rod stamping mechanism, the design variables are determined, the objective function and the constraint condition are established, and the mathematical model of the eight connecting rod parameter optimization design is proposed, which takes the minimum speed fluctuation and the maximum stretching depth as the main design target. The mechanical system simulation software ADAMS is used to simulate the motion of the mechanism, and the parameters are optimized, so that the stamping mechanism with reasonable structure, optimized parameters, suitable process and high mechanical efficiency is obtained.

[0055]

[0056] Table 1

[0057] As shown in Table 1, the total displacement of the slider from the upper dead point to the lower dead point is 1100mm, the working stroke speed of the slider is low and uniform, the speed fluctuation is small, and the speed is less than 0.3m / s, which meets the design requirements of the project. The optimization results are shown in Table 1, which meets the needs of reasonable drawing speed of the sheet metal, and can form high-quality drawing parts. At the same time, the dynamic load of the transmission system is reduced, the mold life is improved, and the impact noise is reduced. In addition, the idle stroke speed of the slider is high, with quick return characteristics, which shortens the stroke cycle time of the slider and improves the stroke frequency of the press.

[0058] After loading the model, the stress curve of each rod system is obtained by simulation, and the data of the curve are analyzed as shown in Table 2, to see whether P≤[P]=35MPa and Pv≤[Pv]=15MPa·m / s are met.

[0059]

[0060] Table 2

[0061] The main shaft 23 and the shaft pin 13 are hollow shafts with different diameters, and one end is a sealed structure. The main shaft 23 and the shaft pin 13 are provided with two oil passing holes 24 on the shaft wall, and the positions of the oil passing holes 24 correspond to the positions of the three-legged frame 16 and the shaft sleeve. The side wall of the eccentric body 26 is provided with an oil passing channel corresponding to the position of the oil passing hole 24 on the shaft wall of the main shaft 23. The sealed end cover 35 is provided with a plurality of oil passing holes corresponding to the positions of the opening ends of the main shaft 23 and the shaft pin 13, and is fixed on the box girder 1 by bolts. One side of the sealed end cover 4 is provided with an oil pipe joint connected to the oil supply of the hydraulic system.

[0062] The side wall of the eccentric body 26 is provided with an oil distribution ring 32, which is communicated with the oil passage, and a plurality of flow guide grooves 33 are arranged on both sides of the oil distribution ring 32, the length of the flow guide grooves 33 on both sides is smaller than the thickness of the tripod 16, the assembly gap between the shaft pin 13 and the shaft sleeve is 0.15mm-0.30mm, and the assembly gap between the tripod 16 and the upper pull rod 12 and the eccentric body 26 is 0.15mm-0.30mm, so that an oil film with sufficient thickness can be formed.

[0063] In the technical scheme, the driving mechanism includes two driving shafts 9, the herringbone gears 11 are provided with two and are meshed with each other, the herringbone gears 11 are fixedly connected to the shaft wall of the driving shaft 9, one side of one of the herringbone gears 11 is meshed with a pinion 34, the center of the pinion 34 is fixedly connected with an input shaft 22, the input shaft 22 and the driving shaft 9 are both rotatably connected in the box girder 1 through roller bearings, two straight tooth portions 8 are arranged on the shaft wall of the driving shaft 9, and the straight tooth portions 8 are meshed with the tooth ring 6, the side wall of the partition plate 21 is provided with a notch, the lowest part of the notch is lower than the lower end of the pinion 34, the width of the notch is greater than the diameter of the two herringbone gears 11, one end of the input shaft 22 penetrates through the roller bearing and is sleeved with a belt pulley 2, one end of the input shaft 22 is provided with a threaded column, a lock nut is threadedly connected to the threaded column, a motor support, a flywheel support, a clutch and a flywheel brake and other accessories are installed on the top surface (the sealing end cover 4) of the box girder 1.

[0064] When the belt pulley 2 is driven by the main motor, the input shaft 22 serves as a first-stage reduction shaft and drives one of the herringbone gears 11 to rotate through the pinion 34, at this time, the other herringbone gear 11 meshed and connected can rotate at the same speed in the opposite direction, at this time, the straight tooth portions 8 on the driving shaft 9 can drive the tooth ring 6 to rotate, and a second-stage reduction effect can be achieved, at this time, the tooth ring 6 rotates around the shaft pin 13 as the center and drives the eccentric body 26 to perform eccentric motion, the position and angle of the hinged part of the upper pull rod 12 and the tripod 16 can be changed when the eccentric body moves, so that the diamond structure of the multi-link transmission mechanism can be changed, the displacement and swing of the tripod 16 can drive the brake lever 17 to make the guide column 5 reciprocate, so that the large-stroke movement (about 1300mm stroke) of the guide column 5 can be achieved.

[0065] The lubricating system comprises an oil pump 36, an oil inlet pipe is arranged at an input end of the oil pump 36, one end of the oil inlet pipe extends into the box girder 1 and extends into the oil collecting groove 20, an oil outlet pipe is fixedly connected to an output end of the oil pump 36, a guide pipe is fixedly connected to a pipe wall of the oil outlet pipe, a plurality of sealing end caps 35 are connected in series through the H-shaped pipe 27, the guide pipe is fixedly connected to one side of one of the sealing end caps 35, the H-shaped pipe 27 is fixedly connected with an oil injection pipe 10 extending into the box girder 1, the oil injection pipe 10 is fixedly connected with a plurality of oil injection nozzles 37 directed to the driving mechanism on a pipe wall of the oil injection pipe 10, a T-shaped oil pipe 19 is fixedly connected to the pipe wall of the oil outlet pipe, the T-shaped oil pipe 19 extends into the box girder 1 and is fixedly connected with two oil distribution pipes at two ends, respectively, the two oil distribution pipes are in communication with lubricating oil passages 39 in the sliding sleeve 18, the lubricating oil passages 39 are annularly arranged in the sliding sleeve 18, a grid structure oil storage groove 38 is arranged in the sliding sleeve 18, the oil storage groove 38 is composed of a plurality of spiral grooves with opposite spiral directions, one side of the sliding sleeve 18 is connected with an oil inlet connector through a threaded hole, a flared portion is arranged at an opening of a lower end of the sliding sleeve 18, an oil scraping ring 40 is arranged in the flared portion and is sleeved with the guide column 5, a locking ring 41 is threadedly connected in the flared portion and abuts against the oil scraping ring 40, and a plurality of rubber rings are sleeved in the locking ring 41.

[0066] The above is a partial facility scheme of the lubricating system, when assembled, the oil pump 36 is a gear pump, the lubricating system has high and low oil pressures, high and low oil level and lubricating frequency detection, the lubricating oil is filtered in three stages, a filter screen is arranged at the oil inlet pipe, a magnetic filter can be additionally arranged in the oil tank (the oil collecting groove 20), the magnetic filter is arranged in an upper layer of the oil tank and can be conveniently taken out for cleaning, two partitions are arranged at the oil inlet port, which is beneficial to the sedimentation of impurities, a filter is arranged at the oil suction port, and a blockage alarm device is provided. The oil outlet of the oil pump 36 is further provided with a pressure pipeline filter, a high and low pressure relay, a pressure gauge, an adjusting valve and other devices, in addition, a double circuit filtering system can be further provided, two same filters are adopted, the filters can be replaced without interruption and an alarm is provided when the filters are blocked.

[0067] Through the implementation of the above technical scheme, the driving mechanism and the multi-link transmission mechanism in the press can be forcibly lubricated, so that the lubricating oil can form a thick enough oil film at the movable hinged points to reduce the mechanical friction between the equipment.

[0068] In addition, since the temperature of the die can be conducted along the slide and the like during stamping, the guide column 5 used in the technical solution adopts a hollow pipe, air inlets and air outlets are arranged on the side wall of the guide column 5, an air source joint is arranged at the air inlet, the lower end of the guide column 5 is fixedly connected with a flange plate 3, the upper end of the guide column 5 is fixedly connected with a hinged seat connected with the multi-link transmission mechanism, the two ends of the guide column 5 are sealed through the flange plate 3 and the hinged seat, the airflow is directed to pass through the inside of the guide column 5 to form a heat dissipation channel 42, at this time, the temperature of the guide column 5 can be controlled and reasonably cooled through the high-speed airflow, and the wear speed between the guide column 5 and the slide 18 caused by thermal expansion of the guide column 5 is avoided.

[0069] The machine is connected through an Ethernet bus by a press PLC control and automatic feeding control system, and the whole line automation control can be realized. The whole line electrical control has the following characteristics:

[0070] 1) The control system uses Rockwell safety PLC, namely L72S series, and uses distributed safety I / O technology to connect safety signals such as emergency stop, safety door, photoelectricity and the like on different parts of the equipment;

[0071] 2) The whole machine distributed I / O uses Ethernet communication technology, including PLC, touch screen, various slave stations and frequency converters connected to the network, and the slave stations are distributed in key parts of the equipment such as beam, column, base, oil tank, fixed button station, slide, which greatly reduces the number of external lines, and Ethernet provides extremely strong communication rate, which lays a solid foundation for the automation control of the whole line. The whole Ethernet network forms a ring network, which reduces the downtime caused by network reasons.

[0072] 3) The main motor frequency converter uses Rockwell PowerFlex 755 series AC frequency converter rectifier unit with AFE series with energy feedback function, which feedbacks the energy to the power grid in time during the motor operation and braking, greatly reducing the energy waste. The whole power control uses the integrated cabinet of Rockwell, which is compact in structure and facilitates the control of each link.

[0073] 4) The product is equipped with wet clutch control technology. The soft clutch and soft brake technology greatly reduces the impact generated during combination and braking. Various detection sensors can monitor the parameters in each link of the clutch system, and the user can see the operation of the clutch system in real time.

[0074] 5) The whole machine is equipped with all conditions for full-automatic die changing, safe control system, energy-saving drive system and perfect visual touch screen, which provide strong guarantee for the whole process. Reasonable program flow reduces the die changing time and improves the production efficiency of the user.

[0075] It is to be understood that the terminology "including", "comprising", or other derivatives from the term "contain" are inclusive and that, in addition to the stated combinations, other combinations are also contemplated. It is to be further understood that the term "comprising" or "comprises" does not exclude other elements being present in addition to those listed. It is to be further understood that the term "including" or "includes" does not exclude other elements being present in addition to those listed.

[0076] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since the scope of the application is defined with respect to the appended claims.

Claims

1. A large-stroke multi-link mechanical press comprising a box beam (1), an end cover (4) is bolted at the upper end of the box beam (1), the upper end of the end cover (4) is provided with a motor seat for mounting a driving motor, characterized in that, Also include: The partition (21), the side wall of the partition (21) is rotatably connected with two shaft pins (13) and two main shafts (23), the shaft wall of two said pin shaft is equipped with multi-link transmission mechanism, the multi-link transmission mechanism realizes transmission in diamond structure, and the diamond structure is deformed by changing the vertical position of one of the hinge points, realizing the reciprocating motion of the slider driven by the multi-link drive mechanism to the workpiece for stamping work; Drive mechanism, the drive mechanism adopts herringbone gear (11) synchronous drive gear ring (6) to drive the multi-link transmission mechanism to drive the guide column (5) to do reciprocating motion; Lubrication system, the lubrication system uses external oil pump (36) to deliver lubricating oil to the drive mechanism, and can also deliver lubricating oil to the movable hinge of the multi-link transmission mechanism through the sealing end cap (35), to realize efficient lubrication of the meshing parts of the drive mechanism, and an oil collecting groove (20) is installed at the bottom of the box girder (1); The sliding sleeve (18) is fixed at the bottom of the box girder (1) and is sleeved with the guide column (5), the sliding sleeve (18) is provided with a lubricating oil channel (39), and the sliding sleeve (18) is provided with an oil inlet joint on one side, which is supplied with oil by the lubrication system to form an oil film at the sleeve joint of the sliding sleeve (18) and the guide column (5), reducing the mechanical wear between the guide column (5) and the sliding sleeve (18) during reciprocating motion.

2. A large-stroke multi-link mechanical press according to claim 1, characterized in that: The multi-link transmission mechanism includes a shaft sleeve sleeved on the shaft pin (13), the side wall of the shaft sleeve is welded with an upper rocker and a lower rocker, the upper rocker and the lower rocker share a rocker arm (14), the upper rocker and the rocker arm (14) are rotatably connected with an upper pull rod (12) through a first hinge shaft, a circular ring is arranged at one end of the upper pull rod (12), an eccentric body (26) is sleeved in the circular ring, the lower rocker and the rocker arm (14) are rotatably connected with a lower pull rod (15) through a second hinge shaft, a tripod (16) is rotatably connected between the lower pull rod (15) and the upper pull rod (12) through a third hinge shaft, two tripods (16) are arranged and an annular connecting part is arranged at one of the sharp corners, the connecting part and the circular ring of the upper pull rod (12) are jointly sleeved on the side wall of the eccentric body (26), the tripod (16) is rotatably connected with a brake lever (17) through a fourth hinge shaft, the lower end of the brake lever (17) is rotatably connected with the upper end of the guide column (5) through a fifth hinge shaft, the first hinge shaft, the second hinge shaft, the third hinge shaft and the pin shaft jointly form four top corners of the diamond structure of the multi-link transmission mechanism; One end of the eccentric body (26) is fixedly connected with an eccentrically arranged rotating disc (7), one side of the rotating disc (7) is fixedly connected with the gear ring (6) through bolts, wherein one side of the rotating disc (7) is sleeved with the positioning flange of the gear ring (6), the center of the rotating disc (7) is fixedly connected with the eccentric body (26) through the round hole and the shaft wall interference plus key connection of the main shaft (23), both ends of the shaft pin (13) and the main shaft (23) are rotatably connected on the inner side of the box girder (1) through spherical roller bearings, and the middle part of the shaft pin (13) is rotatably connected on the partition plate (21) through a ball bearing.

3. A large-stroke multi-link mechanical press according to claim 2, characterized in that: The side wall of the eccentric body (26) is fixedly connected with a positioning ring (28), one side of the upper pull rod (12) is in contact with the positioning ring (28) during assembly, and a spacer ring (29) sleeved with the eccentric body (26) is arranged between the upper pull rod (12) and the tripod (16), one side of the tripod is slidably provided with a limiting ring (30) sleeved with the eccentric body (26), and the limiting ring (30) is fixedly connected with one side of the eccentric body (26) through bolts, a clamping groove (31) is formed in the shaft wall of the main shaft (23) in the circumferential direction, two semicircular locking blocks (25) are clamped in the clamping groove (31), and the locking blocks (25) are fixed on the main shaft (23) by bolts to limit the axial movement of the eccentric block.

4. A large-stroke multi-link mechanical press according to claim 2, characterized in that: The main shaft (23) and the shaft pin (13) are hollow shafts with different diameters, and one end is a sealing structure, two oil passing holes (24) are formed in the shaft wall of the main shaft (23) and the shaft pin (13), and the positions of the oil passing holes (24) correspond to the positions of the tripod (16) and the shaft sleeve, an oil passing channel corresponding to the positions of the oil passing holes (24) in the shaft wall of the main shaft (23) is formed in the side wall of the eccentric body (26), a plurality of sealing end covers (35) are arranged and fixed on the box girder (1) by bolts corresponding to the positions of the opening ends of the main shaft (23) and the shaft pin (13), and one side of the sealing end cover (4) is provided with an oil pipe joint connected to the hydraulic system for oil supply.

5. A large-stroke multi-link mechanical press according to claim 4, characterized in that: An oil distribution ring (32) is formed in the side wall of the eccentric body (26), the oil distribution ring (32) is in communication with the oil passing channel, a plurality of flow guide grooves (33) are formed on both sides of the oil distribution ring (32), the lengths of the flow guide grooves (33) on both sides are less than the thickness of the tripod (16), the assembly gap between the shaft pin (13) and the shaft sleeve is 0.15mm-0.30mm, and the assembly gap between the tripod (16) and the upper pull rod (12) and the eccentric body (26) is 0.15mm-0.30mm, so as to form an oil film with sufficient thickness.

6. A large-stroke multi-link mechanical press according to claim 1, characterized in that: The driving mechanism comprises two driving shafts (9), the two mutually meshed herringbone gears (11) are fixedly connected to the shaft wall of the driving shaft (9), one side of one of the herringbone gears (11) is meshed with a pinion (34), the center of the pinion (34) is fixedly connected with an input shaft (22), the input shaft (22) and the driving shaft (9) are rotatably connected in the box girder (1) through roller bearings, the shaft wall of the driving shaft (9) is provided with two straight tooth parts (8), and the straight tooth parts (8) are meshed with a tooth ring (6), the side wall of the partition plate (21) is provided with a notch, the lowest part of the notch is lower than the lower end of the pinion (34), and the width of the notch is greater than that of the two herringbone gears (11). One end of the input shaft (22) penetrates through the roller bearing and is sleeved with a belt pulley (2), one end of the input shaft (22) is provided with a threaded column, and a locking nut is threadedly connected on the threaded column.

7. A large-stroke multi-link mechanical press according to claim 1, characterized in that: The lubricating system comprises an oil pump (36), an oil inlet pipe is mounted at the input end of the oil pump (36), one end of the oil inlet pipe extends into the box girder (1) and extends into the oil collecting groove (20), an oil outlet pipe is fixedly connected to the output end of the oil pump (36), a guide pipe is fixedly connected to the pipe wall of the oil outlet pipe, a plurality of the sealing end caps (35) are connected in series through an H-shaped pipe (27), one side of one of the sealing end caps (35) is fixedly connected with the guide pipe, the pipe wall of the H-shaped pipe (27) is fixedly connected with an oil injection pipe (10) extending into the box girder (1), and a plurality of oil injection nozzles (37) facing the driving mechanism are fixedly connected to the pipe wall of the oil injection pipe (10).

8. A large-stroke multi-link mechanical press according to claim 7, characterized in that: A T-shaped oil pipe (19) is fixedly connected to the pipe wall of the oil outlet pipe, the T-shaped oil pipe (19) extends into the box girder (1) and is fixedly connected with a distribution pipe at both ends, and the two distribution pipes are in communication with the lubricating oil channels (39) in the sliding sleeve (18).

9. A large-stroke multi-link mechanical press according to claim 1, characterized in that: The lubricating oil channels (39) are annularly arranged in the sliding sleeve (18), the sliding sleeve (18) is provided with a grid structure oil storage groove (38), the oil storage groove (38) is composed of a plurality of spiral grooves with opposite spiral directions, one side of the sliding sleeve (18) is connected with an oil inlet joint through a threaded hole, the lower end of the sliding sleeve (18) is provided with an expanded portion, the expanded portion is provided with a scraping ring (40) sleeved with a guide column (5), the expanded portion is threadedly connected with a locking ring (41) abutting against the scraping ring (40), and the locking ring (41) is sleeved with a plurality of rubber rings.

10. A large-stroke multi-link mechanical press according to claim 1, characterized in that: The guide column (5) is a hollow pipe, the side wall of the guide column (5) is provided with an air inlet and an air outlet, an air source joint is mounted at the air inlet, the lower end of the guide column (5) is fixedly connected with a flange plate (3), and the upper end of the guide column (5) is fixedly connected with a hinged seat connected with the multi-link transmission mechanism. The flange plate (3) and the hinged seat realize sealing of both ends of the guide column (5), so that the airflow is directed to pass through the inside of the guide column (5) to form a heat dissipation channel (42).

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