CN112692113A

CN112692113A - Multi-drive combined bending machine

Info

Publication number: CN112692113A
Application number: CN202011465863.8A
Authority: CN
Inventors: 汪立新; 王军; 李振光; 张磊
Original assignee: Ruitie Machine Tool Suzhou Co ltd
Current assignee: Ruitie Machine Tool Suzhou Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-04-23
Anticipated expiration: 2040-12-14
Also published as: EP4129512A1; CN112692113B; EP4129512A4; WO2022127501A1

Abstract

The invention discloses a multi-drive combined bending machine which comprises a bending assembly, a driving assembly and a transmission assembly, wherein two ends of the transmission assembly are respectively connected with the bending assembly and the driving assembly; the transmission assembly comprises a transmission part and a mounting part arranged on the transmission part, a connecting part with one end fixedly connected with the mounting part is arranged on the mounting part, the connecting part is sleeved with a bending assembly capable of rotating relative to the mounting part, the mounting part is sleeved with a sleeve between the bending assemblies, the connecting part is arranged on the connecting part and can rotate relative to the connecting part, the bending assembly can abut against the rotating part to rotate the connecting part under the action of external force. The invention at least comprises the following advantages: through rotating the cooperation between piece, drive assembly and the subassembly of bending, guarantee that drive assembly can not take place to warp around the subassembly deformation process of bending, consequently make the driving medium can not take place the inefficacy phenomenon.

Description

Multi-drive combined bending machine

Technical Field

The invention relates to the technical field of bending machines, in particular to a multi-drive combined bending machine.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

The existing pure electric servo bending machine in the market is a new direction for the development of the bending machine industry at present due to the advantages of energy conservation, consumption reduction, high efficiency, quick action response, no need of hydraulic oil and the like. However, the current pure electric servo bending machine has technical bottlenecks due to the influences of factors such as load, bending deformation, unbalance loading deformation and the like.

The existing pure electric servo bending machine usually adopts a screw nut as a transmission structure, generally adopts a transmission form that a single screw rod is combined with a servo motor, and is difficult to meet the application occasion with larger load due to the limitation of the load characteristic of a ball screw rod. In addition, the slide plate is deformed by a certain amount due to the contact operation during the bending process. In the prior art, the compensation component and the data processing component are combined for elimination, but the scheme is established in a working state that the stress points at the two ends of the sliding plate are hinged. In the prior art, the screw rod nut structure is fixed at the stress point of the sliding plate, so that the theoretical position of the screw rod driven by the nut deviates in the deformation process, and the bending precision and reliability are poor; in addition, the screw rod can be subjected to quick reciprocating radial force in the radial direction in the bending process, so that the screw rod can swing, the use characteristic of the screw rod is combined, the failure phenomenon of the screw rod is easily caused, and the transmission efficiency and the service life of the screw rod are greatly reduced.

It should be noted that the above background description is only for the sake of clarity and complete description of the technical solutions of the present invention and for the understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the invention.

Disclosure of Invention

In order to overcome the defects in the prior art, the embodiment of the invention provides the multi-drive combined bending machine, which ensures that the transmission assembly cannot deform before and after the deformation process of the bending assembly through the matching among the rotating member, the transmission assembly and the bending assembly, so that the transmission member cannot fail.

The embodiment of the application discloses: the multi-drive combined bending machine comprises a bending assembly, a driving assembly and a transmission assembly, wherein two ends of the transmission assembly are respectively connected with the bending assembly and the driving assembly, so that the transmission assembly can drive the bending assembly to move towards a material to be bent under the action of the driving assembly;

the transmission assembly comprises a transmission part and a mounting part arranged on the transmission part, a connecting part with one end fixedly connected with the mounting part is arranged on the mounting part, the connecting part is sleeved with a bending assembly capable of rotating relative to the mounting part, the mounting part is sleeved with a sleeve between the bending assemblies, the connecting part is arranged on the connecting part and can rotate relative to the connecting part, the bending assembly can abut against the rotating part to rotate the connecting part under the action of external force.

Furthermore, the number of the transmission pieces is multiple, and the transmission pieces are symmetrically arranged relative to the bending assembly and are positioned on the inner side and the outer side of the bending assembly.

Further, the connecting piece include the stiff end with installed part screw thread locking, free end wear to establish bend the pull rod of subassembly, it is in including fixed the setting to rotate the piece the installed part on and with the lateral wall of pull rod has the thrust joint bearing who predetermines the clearance.

Furthermore, the assembly of bending includes the riser, sets up the portion of bending on the riser, set up the installation breach that extends along its inside and outside direction on the riser, the free end of pull rod can wear to establish the part along the moving direction of the assembly of bending the riser structure back extends to in the installation breach, be provided with on the free end of pull rod can with the retaining member of the inside wall butt of riser.

Further, the retaining member with still be provided with the cover between the inside wall of riser and establish conical surface spare and spherical surface spare on the pull rod, wherein the spherical butt setting of the conical surface of conical surface spare and spherical surface spare.

Furthermore, the bending device further comprises a guide rail extending along the moving direction of the bending assembly, and a guide piece capable of being fixedly connected with the vertical plate is arranged on the guide rail in a sliding mode.

Further, the transmission part comprises ball screws extending along the moving direction of the bending assembly, the mounting part comprises nut seats arranged on the two ball screws in a threaded manner, and each ball screw corresponds to one driving assembly.

Furthermore, a plurality of lubricating through holes extending to the ball screw are formed in the nut seat, and oil nozzles are arranged on the lubricating through holes.

Further, drive assembly includes servo motor, first pulley spare, synchronous belt spare and second pulley spare, wherein servo motor's output with first pulley spare drive is connected, second pulley spare with drive assembly drive is connected, the synchronous belt sets up on first pulley spare and the second pulley spare, with servo motor's drive power transmission extremely on the drive assembly.

Further, a bearing piece arranged on the ball screw in a penetrating mode is arranged between the second belt wheel piece and the transmission assembly, and the bearing piece comprises a gland, a bearing seat and a plurality of angular contact thrust ball bearings.

By means of the technical scheme, the invention has the following beneficial effects:

1. according to the bending assembly and the rotating part, in the process that the vertical plate of the bending assembly is arched upwards and deformed, only the rotating part rotates by a corresponding angle under the action of the vertical plate, and relative positions of the connecting part, the mounting part and the transmission part do not change before and after the vertical plate is arched upwards and deformed, so that the transmission part cannot lose efficacy in the prior art;

2. in the application, through the arrangement of the driving assembly and the transmission assembly, each group of transmission parts are symmetrically arranged relative to the vertical plate and are positioned on the inner side and the outer side of the vertical plate, and two transmission parts can be arranged at each fixed point of the vertical plate, so that the original load is doubled; and in addition, a two-point fixing mode is adopted, and under the condition that the failure of the ball screw is completely avoided, the precise compensation can be effectively completed by matching a numerical control system and a compensation mechanism in the prior art.

In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall apparatus structure in an embodiment of the present invention;

FIG. 2 is a schematic diagram of the structure at the rack in an embodiment of the invention;

FIG. 3 is a schematic diagram of a portion of an embodiment of the present invention;

FIG. 4 is a partial cross-sectional view of the transmission assembly in an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

fig. 6 is a top view of a portion of an embodiment of the present invention.

Reference numerals of the above figures: 1. bending the assembly; 2. a drive assembly; 3. a transmission assembly; 4. a connecting member; 5. a rotating member; 6. a guide rail; 7. a guide member; 11. a vertical plate; 12. a bending part; 13. installing a notch; 21. a servo motor; 22. a first pulley member; 23. a synchronous belt member; 24. a second pulley member; 25. a gland; 26. a bearing seat; 27. a thrust angular contact ball bearing; 31. a ball screw; 32. a nut seat; 33. lubricating the through hole; 34. a nozzle tip; 41. a locking member; 42. a conical member; 43. a spherical member.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, in the description of the present invention, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is considered as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Referring to fig. 1 to 6, the present embodiment discloses a multi-drive combined bending machine, which includes a bending assembly 1, a driving assembly 2 and a transmission assembly 3. The components can be arranged on the frame according to installation requirements, wherein two ends of the transmission component 3 can be respectively connected with the bending component 1 and the driving component 2, so that the transmission component 3 can drive the bending component 1 to move towards the material to be bent under the action of the driving component 2, and the bending process is effectively finished. The bending machine can be matched with a numerical control system in the prior art to more intelligently complete required actions.

Referring to fig. 1 and 2, in this embodiment, the frame includes a first wall panel, a second wall panel extending in a vertical direction and spaced apart from each other, and a plurality of vertical plates 11 and reinforcing ribs arranged between the first wall panel and the second wall panel. The first wallboard and the second wallboard are provided with lifting lugs, the number of the lifting lugs can be two, or can be a multiple of two, so that the rack can be effectively conveyed by fixedly connecting the lifting lugs with external equipment in the subsequent position transfer process of the rack. The material of the frame can be made of steel material according to the requirements of parameters such as hardness, weight and the like, and can be formed by matching the steel material with other materials, which is not limited and described herein.

As shown in fig. 1, in the present embodiment, the transmission assembly 3 is disposed above the bending assembly 1, the driving assembly 2 is disposed above the transmission assembly 3, and the driving assembly 2 is disposed on the frame. The bending assembly 1 comprises a vertical plate 11 extending in the vertical direction and a bending part 12 arranged on the vertical plate 11. Preferably, the bending part 12 is disposed at or near the lower end of the vertical plate 11. Bending part 12 comprises knife pressing piece and installed part, bending part 12 is according to the equal adaptability setting of different demand angles, the equal parameters of position of the material spare of being bent.

In the present embodiment, the driving assembly 2 adopts a pure electric servo driving method, and specifically includes a pure electric servo motor 21, a first pulley 22, a synchronous belt 23, and a second pulley 24. In order to provide the characteristics of compact structure and small occupied space, the above structure is preferably a mounting method as described below. The pure electric servo motor 21 is fixedly arranged on the rack, and an output shaft of the pure electric servo motor extends in the vertical direction. The first pulley piece 22 can be a small pulley which can be in driving connection with the pure electric servo motor 21 and is positioned above the pure electric servo motor 21; the second belt wheel piece 24 can be a large belt wheel, the first belt wheel piece 22 and the second belt wheel piece 24 are both arranged on the same horizontal plane, and can be in transmission connection with the synchronous belt piece 23 in a meshing mode.

In the above arrangement mode, when the electric servo motor 21 outputs a preset rotating speed to drive the first pulley 22 to rotate, the first pulley 22 can effectively drive the second pulley 24 to rotate through the synchronous belt 23, so that the effective transmission of the driving force of the electric servo motor 21 is realized. Of course, the first pulley member 22 and the second pulley member 24 may also adopt other transmission structures such as a gear member, and are not limited or described herein.

As shown in fig. 1 and fig. 3 to fig. 6, during the bending process, due to the mechanical limit of the structure such as the workbench and the influence of the bending force factor, the vertical plate 11 of the bending assembly 1 may have a deformation phenomenon that two fixed end portions are taken as starting points and the middle position is arched upwards, and at the same time, a slight left-right deflection phenomenon may also occur, and the deformation and the deflection are the expression form of the rotation of the bending assembly relative to the connecting member 4.

The transmission assembly 3 adopted in the prior art is a screw rod nut piece generally, the vertical plate 11 is a fixing mode of hard connection with the nut piece, on one hand, the deformation phenomenon can cause the screw rod to swing in the radial direction under the action of the deformation force all the time, and further cause the failure phenomena such as breakage of the fixed end of the screw rod, on the other hand, the traditional installation fixing mode is a fixing mode of penetrating and locking a plurality of parts by bolts, the locking process can be completed only by matching with the machining precision between the parts, and the machining difficulty is large. The technical scheme of the transmission assembly 3 disclosed in the implementation can effectively solve the technical problems.

In this embodiment, the transmission assembly 3 includes a transmission member and an installation member disposed on the transmission member, and the installation member is provided with a connection member 4 having one end fixedly connected to the installation member. The connecting piece 4 is sleeved with the bending assembly capable of rotating relative to the connecting piece, the mounting piece and the bending assembly are sleeved with each other, the connecting piece 4 is provided with the rotating piece 5 capable of rotating relative to the connecting piece 4, the bending assembly 1 can abut against the rotating piece 5 to rotate the connecting piece 4 relatively under the action of external force. Due to the structural arrangement, in the process that the vertical plate 11 of the bending assembly 1 is arched upwards and deformed, only the rotating part 5 rotates by a corresponding angle under the action of the vertical plate 11, and the relative positions of the connecting part 4, the mounting part and the transmission part are not changed before and after the vertical plate 11 is arched upwards and deformed, so that the transmission part cannot fail in the prior art.

In one embodiment, the transmission member is a commercially available ball screw 31, and the ball screw 31 includes a ball screw extending in a vertical direction and a nut seat 32 threaded on the ball screw 31. The upper end of the ball screw 31 is in transmission connection with the second pulley 24, so that the ball screw 31 can rotate around its axis under the driving force of the pure electric servo motor 21, and further drives the nut seat 32 to reciprocate along the vertical direction. The vertical plate 11 is connected with the nut seat 32 and can move synchronously along the vertical direction along with the nut seat 32.

The ball screw 31 is preferably respectively disposed at the left side and the right side of the upper end of the vertical plate 11, wherein the vertical plate 11 is correspondingly provided with an installation notch 13 extending along the inner and outer directions thereof. Preferably, the mounting notch 13 penetrates through both the inner and outer side surfaces of the vertical plate 11. The nut seat 32 is provided with a plurality of lubrication through holes 33 extending to the ball screw 31, and the lubrication through holes 33 are provided with oil nozzles 34. Lubricating oil is added to the oil nozzle 34, so that the lubricating oil can act on the ball screw 31, a good lubricating effect is achieved, and the service life is prolonged.

The above-mentioned connecting element 4 comprises a tie rod extending in the vertical direction. A threaded hole extending in the vertical direction is formed in the lower end face of the nut seat 32, and a connecting hole extending in the vertical direction is formed in the upper surface of the vertical plate 11 and can be communicated with the mounting notch 13. The upper end part of the pull rod is locked in the threaded hole through threads, and the lower end part (namely, the free end) of the pull rod passes through the connecting hole and then extends into the mounting notch 13. The free end of the pull rod is provided with a locking member 41 which can be abutted against the inner side wall of the vertical plate 11, and the nut seat 32 is connected with the vertical plate 11 through the pull rod.

The rotor 5 includes a thrust joint bearing fixedly provided on the lower surface of the nut holder 32 and capable of abutting against the upper end surface of the upright plate 11. The sliding surface of the thrust knuckle bearing is spherical, so that the thrust knuckle bearing can perform tilting motion (namely aligning motion) within a certain angle range. It is worth noting that the vertical plate 11 and the thrust knuckle bearing are in clearance fit with the pull rod.

Through the arrangement mode, in the deformation process of the vertical plate 11, through the arrangement of the thrust knuckle bearing, the sliding part of the thrust knuckle bearing can rotate by a corresponding angle along with the vertical plate 11; by combining the clearance fit manner, the deformation of the vertical plate 11 and the rotation of the thrust knuckle bearing do not contact with the pull rod, and further, the mechanical interference phenomenon is not generated, so that the relative positions of the pull rod, the nut seat 32 and the ball screw 31 before and after the deformation of the vertical plate 11 are not changed, especially the screw does not receive the force in the radial direction, which is completely different from the prior art, and the phenomenon that the ball screw 31 fails in the prior art is not generated.

Referring to fig. 1 and 3, in the present embodiment, the number of the transmission members is multiple, preferably, the number of the transmission members is four, two of the transmission members are in one group, and each group of the transmission members is symmetrically arranged with respect to the vertical plate 11 and located on the inner side and the outer side of the vertical plate 11. The four transmission members described above run synchronously, and the nut seat 32 of each set of transmission members may be integrally provided.

At present, the pure electric servo bending machine is influenced by a connecting structure between the transmission assembly 3 and the bending assembly 1, and only one pure electric servo motor 21 can be arranged at one fixed point, so that the defect of small single-point load is caused by the condition. In addition, in order to increase the load of the bending machine, the vertical plate 11 is arched in a wave shape in a vertical plane in the working process by adopting multi-point arrangement on the basis of the structure, and accurate compensation cannot be completed by matching with a numerical control system and a compensation mechanism in the prior art.

In the embodiment, through the arrangement manner, two transmission parts can be arranged at each fixed point of the vertical plate 11, so that the original load is doubled; in addition, a two-point fixing mode is adopted, and under the condition that the ball screw 31 is completely prevented from being out of work, the accurate compensation can be completed by effectively matching a numerical control system and a compensation mechanism in the prior art.

Referring to fig. 4 and 5, in this embodiment, a conical member 42 and a spherical member 43 sleeved on the pull rod are disposed between the locking member 41 and the inner sidewall of the vertical plate 11, wherein a conical surface of the conical member 42 abuts against a spherical surface of the spherical member 43, and the conical member 42 is located above the spherical member 43. In the process of operating the two sets of transmission assemblies 3, the heights of the two sides of the vertical plate 11 may slightly differ due to errors such as mechanical matching, and the spherical member 43 can rotate relative to the conical member 42 to solve the above-mentioned problem, so that the eccentric load of the ball screw can be avoided, the difficulty in mounting the vertical plate 11 and the machine frame is reduced, and the bending portion 12 arranged on the vertical plate 11 and the workbench have good parallelism, so as to accurately bend the material to be bent.

An elastic part sleeved on the pull rod is further arranged between the conical surface part 42 and the inner side wall of the vertical plate 11. The elastic part comprises a spring washer sleeved on the pull rod and abutted against the inner side wall of the vertical plate 11, and a disc spring positioned between the spring washer and the conical surface part 42. The working environment of the vertical plate 11 needs to make a rapid reciprocating motion in the vertical direction, and the flexible arrangement mode can play a role in buffering when the vertical plate 11 is lifted upwards, and can be used in combination with the conical member 42 and the spherical member 43, so that the processing difficulty and cost between the vertical plate 11 and the nut seat 32 are reduced.

In the present embodiment, a bearing member is provided between the second pulley member 24 and the transmission assembly 3. Specifically, the bearing member is located below the second pulley member 24 and is disposed on the transmission assembly 3 in a penetrating manner. The bearing piece comprises a bearing seat 26 fixedly arranged on the frame, a plurality of angular contact thrust ball bearings 27 positioned on the bearing seat 26, and a gland 25 used for limiting the angular contact thrust ball bearings 27. In the above arrangement, the bearing member has a large contact angle, and is therefore less affected by centrifugal force, and is more suitable for the ball screw 31 rotating at high speed in the present application.

With reference to fig. 1 and 3, the bending machine of the present application further includes a guide rail 6 disposed outside the vertical plate 11 along the vertical direction, and a guide 7 capable of being fixedly connected to the vertical plate 11 is slidably disposed on the guide rail 6. The position of the guide rail 6 relative to the frame is fixed, so that the guide rail can play a role in guiding the vertical plate 11 in the process of reciprocating in the vertical direction.

The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. The multi-drive combined bending machine is characterized by comprising a bending component, a driving component and a transmission component, wherein two ends of the transmission component are respectively connected with the bending component and the driving component, so that the transmission component can drive the bending component to move towards a material to be bent under the action of the driving component;

2. A multi-drive combined bending machine according to claim 1, wherein said plurality of transmission members is provided in plurality, and a plurality of said transmission members are symmetrically provided about said bending assembly on both inner and outer sides of said bending assembly.

3. The multi-drive combined bending machine according to claim 1, wherein the connecting member comprises a pull rod with a fixed end locked with the mounting member through screw threads and a free end penetrating through the bending assembly, and the rotating member comprises a thrust knuckle bearing fixedly arranged on the mounting member and having a preset gap with an outer side wall of the pull rod.

4. The multi-drive combined bending machine according to claim 3, wherein the bending assembly comprises a vertical plate and a bending portion arranged on the vertical plate, the vertical plate is provided with an installation notch extending along the inside and outside direction of the vertical plate, the free end of the pull rod can extend into the installation notch after penetrating through a part of the vertical plate structure along the moving direction of the bending assembly, and the free end of the pull rod is provided with a locking member capable of abutting against the inner side wall of the vertical plate.

5. The multi-drive combined bending machine according to claim 4, wherein a conical member and a spherical member are further disposed between the locking member and the inner side wall of the vertical plate, the conical member and the spherical member being sleeved on the pull rod, and the conical surface of the conical member and the spherical surface of the spherical member are abutted to each other.

6. The multi-driver combined bending machine according to claim 4, further comprising a guide rail extending along the moving direction of the bending assembly, wherein a guide capable of being fixedly connected with the vertical plate is slidably arranged on the guide rail.

7. A multi-drive combined bending machine according to claim 1, wherein said transmission member comprises a ball screw extending in the direction of movement of said bending assemblies, and said mounting member comprises a nut seat threaded on both of said ball screws, wherein each of said ball screws corresponds to a respective one of said drive assemblies.

8. The multi-drive combined bending machine according to claim 7, wherein a plurality of lubricating through holes extending to the ball screw are formed in the nut seat, and oil nozzles are arranged on the lubricating through holes.

9. A multi-drive combined bending machine according to claim 7, wherein said drive assembly comprises a servo motor, a first pulley member, a synchronous pulley member and a second pulley member, wherein an output end of said servo motor is drivingly connected to said first pulley member, said second pulley member is drivingly connected to said drive assembly, and said synchronous belt is disposed on said first and second pulley members to transmit a driving force of said servo motor to said drive assembly.

10. The multi-drive combined bending machine according to claim 9, wherein a bearing member disposed on the ball screw in a penetrating manner is disposed between the second pulley member and the transmission assembly, and the bearing member includes a gland, a bearing seat, and a plurality of angular contact thrust ball bearings.