An adaptive compensation structure for sheet metal bending machines
By setting strip grooves and a central shaft at both ends of the worktable of the sheet metal bending machine, combined with a gap limiting component, the problem of bending accuracy affected by the deflection deformation of the worktable is solved, achieving adaptive compensation and precise bending effect, and reducing equipment cost and adjustment complexity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN RADIUM GOSS CNC EQUIP CO LTD
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-17
AI Technical Summary
Existing sheet metal bending machines experience deflection deformation under stress on the worktable, affecting bending accuracy. Furthermore, the electric drive compensation method is costly, prone to damage, and cumbersome to adjust.
The bottom of both ends of the worktable is inclined with strip grooves, and the central shaft is used as a support point to realize the adaptive movement of both ends of the worktable. Combined with the gap limiting component, the deformation is adjusted to ensure the flatness of the worktable. The simple structure reduces costs.
It achieves adaptive compensation of the worktable, reduces deformation, ensures accurate bending angle of sheet metal, reduces production costs, and simplifies the adjustment process.
Smart Images
Figure CN224508107U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bending equipment technology, and in particular to an adaptive compensation structure for a sheet metal bending machine. Background Technology
[0002] Bending machines are mainly used for bending metal sheets. Under the pressure of the upper or lower die of the bending machine, the metal sheet first undergoes elastic deformation and then enters plastic deformation. Before the plastic deformation begins, the sheet is freely bent. As the upper or lower die applies pressure to the sheet, the sheet gradually comes into close contact with the inner surface of the lower die groove. At the same time, the radius of curvature and the bending lever arm gradually decrease. The upper or lower die continues to apply pressure to the sheet until the stroke ends, making the upper and lower dies and the sheet fully contacted at three points. At this point, a sheet deformation and bending is completed, and the sheet bending process is finished.
[0003] Currently, sheet metal bending machines on the market experience deflection deformation during the bending process due to the force applied to the worktable, which affects bending accuracy. Therefore, corresponding measures must be taken to compensate for or eliminate the deflection deformation generated by the bending machine. Existing bending machines mainly use an electrically driven compensation and convex worktable to reduce bending angle errors caused by deflection deformation. The main working principle is that the motor and cylinder drive the curved processing wedge on the compensation table, and the convex amount of the worktable is increased to cancel out the deflection deformation, thus achieving a compensation effect. This ensures that the upper die enters the lower die at a consistent depth and maintains a consistent bending angle. However, since the existing compensation drive method mainly uses electric compensation, it not only greatly increases the equipment cost but also easily leads to motor damage. Furthermore, adjusting the convex amount of the worktable to control the compensation value is quite cumbersome.
[0004] Therefore, how to achieve an adaptive compensation structure for the worktable during sheet metal bending is the main technical problem that technicians need to solve. Utility Model Content
[0005] The purpose of this invention is to provide an adaptive compensation structure for a sheet metal bending machine to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: an adaptive compensation structure for a sheet metal bending machine, comprising:
[0007] A worktable and clearance limiting assembly fixed to the frame;
[0008] Both ends of the worktable are inclined with strip-shaped through grooves. One end of the strip-shaped through groove extends to the outside of the worktable, and one end of the strip-shaped through groove is also provided with a placement slot for installing the gap limiting component. The other end of the strip-shaped through groove is provided with a mounting hole, and a central shaft component passes through the mounting hole.
[0009] The gap limiting component includes a fixing block that is adapted to the placement slot. A fixing shaft is provided on the top of the fixing block, and an adjusting sleeve is fitted on the outside of the fixing shaft. The adjusting sleeve includes a movable top sleeve and a supporting bottom sleeve, and the bottom of the movable top sleeve and the top of the supporting bottom sleeve are engaged and provided with an annular step.
[0010] Preferably, both of the two strip-shaped channels are inclined upwards, the two strip-shaped channels are symmetrically positioned, and the other ends of both strip-shaped channels are close to the middle of the worktable.
[0011] Preferably, the middle of the slot is provided with a snap-fit part extending upward, the bottom of the fixing block is provided with a slot that matches the snap-fit part, and both the snap-fit part and the slot are provided with through holes for inserting locking screws.
[0012] Preferably, the bottom of the fixing shaft protrudes outward to form a limiting portion that abuts against the top of the fixing block, and a washer is also fitted on the outside of the fixing shaft, the washer being located at the bottom of the supporting base sleeve.
[0013] Preferably, the annular staircase is provided with a plurality of compensation steps, and the plurality of compensation steps are arranged in ascending order along the axial direction of the adjusting sleeve.
[0014] Preferably, the surface of the workbench is provided with several adjustment through holes, each of which is fixed with a thrust washer, and each of the adjustment through holes is provided with an adjustment screw, through which the workbench is connected to the frame.
[0015] Preferably, the workbench is further provided with a number of mold base pressing blocks on its exterior. The mold base pressing blocks are detachably mounted on the workbench and are distributed at intervals along the length of the workbench.
[0016] Compared with existing technologies, this technical solution provides an adaptive compensation structure for a sheet metal bending machine: by providing inclined strip-shaped grooves at both ends of the worktable, a certain amount of movement space is provided at both ends of the worktable, so that when the lower worktable is subjected to force, the deformation at both ends of the worktable is consistent with the deformation at the middle of the worktable. A centrally located shaft inside the mounting hole serves as a support point, allowing the two ends of the worktable to adaptively move downwards and then rebound upwards to reset when the worktable is subjected to working force, achieving a state of deformation balance between the two ends and the middle of the worktable. This adaptive compensation deformation movement maintains the straightness of the worktable, reducing deformation at both ends. Furthermore, when the deformation at both ends of the worktable is large, the required amount of deformation can be adjusted by using a gap limiting component in the placement slot. The overall structure is simple, reducing production costs while achieving adaptive compensation and ensuring precise bending angles. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0019] Figure 2 This is a schematic diagram of the worktable and gap limiting component in this utility model.
[0020] Figure 3 This is an enlarged structural diagram of point A in this utility model.
[0021] Figure 4 This is a schematic diagram of the connection structure between the workbench and the frame in this utility model.
[0022] Figure 5 This is an enlarged structural diagram of point B in this utility model.
[0023] As indicated by the markings in the diagram: 1. Workbench; 2. Gap limiting assembly; 3. Placement slot; 11. Strip groove; 12. Adjustment through hole; 13. Thrust washer; 14. Adjusting screw; 15. Mold base pressure block; 21. Fixing block; 22. Fixing shaft; 23. Adjusting sleeve; 31. Snap-fit part; 111. Mounting round hole; 112. Central shaft; 211. Bayonet; 221. Limiting part; 222. Washer; 231. Movable top sleeve; 232. Supporting bottom sleeve. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. The preferred embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. Although the preferred embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this utility model more thorough and complete, and to fully convey the scope of this utility model to those skilled in the art.
[0025] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.
[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0027] In the description of this utility model, it should be understood that the terms "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0029] It should be understood that although the terms "first," "second," "third," etc., may be used to describe various components in this invention, this information should not be limited to these terms. These terms are only used to distinguish components of the same type from each other. For example, without departing from the scope of this invention, a first component may also be referred to as a second component, and similarly, a second component may also be referred to as a first component. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.
[0030] The following is in conjunction with the appendix Figures 1 to 5 The technical solutions of the embodiments of this utility model are described in detail.
[0031] In Example 1, to achieve adaptive compensation for the deflection deformation of the workbench 1, during the sheet metal bending process, the sheet metal needs to be placed on the mold of the workbench 1, and the sheet metal is deformed by pressing down with a bending knife. During this process, the pressure variable in the middle of the workbench 1 is different from the pressure variable at both ends of the workbench 1, so the workbench 1 will deflect and deform, affecting the bending quality of the sheet metal. In this example: a workbench 1 fixed on the frame and a gap limiting component 2 are provided; a strip-shaped through groove 11 is inclinedly provided at the bottom of both ends of the workbench 1, so that one end of the strip-shaped through groove 11 extends to the outside of the workbench 1, and a mounting round hole 111 is provided at the other end of the strip-shaped through groove 111, and a central shaft 112 is inserted inside the mounting round hole 111.
[0032] During the bending process, the worktable 1 undergoes deflection deformation under stress. By providing a certain amount of space for movement at both ends of the worktable 1 through inclined slots 11 at the bottom of both ends, the deformation at both ends of the worktable 1 is consistent with that at the middle of the worktable 1 when the lower worktable 1 is subjected to stress. The central shaft 112 inside the mounting hole serves as a support point, allowing the left and right ends of the worktable 1 to adaptively move downward and then rebound upward to reset during operation. This achieves a state of deformation balance between the two ends and the middle of the worktable 1, realizing adaptive compensation deformation movement to maintain the straightness of the worktable 1 and effectively reducing the deformation at both ends of the worktable 1. Furthermore, when the deformation at both ends of the worktable 1 is large, the required amount of deformation can be adjusted by the gap limiting component 2 provided in the placement slot 3.
[0033] It should be noted that in this embodiment, both strip-shaped through grooves 11 are inclined upwards, so that the positions of the two strip-shaped through grooves 11 are symmetrical. The other ends of the two strip-shaped through grooves 11 are also close to the middle of the worktable 1. During the bending process, when the middle of the worktable 1 is subjected to force, it is convenient for both ends of the worktable 1 to move downwards adaptively and ensure that both ends can move downwards synchronously.
[0034] It should also be noted that, in order to achieve the adjustment of the front and rear vertical position of the worktable 1, several adjustment through holes 12 are provided on the surface of the worktable 1. Thrust washers 13 are fixedly installed in the adjustment through holes 12, and adjustment screws 14 are inserted inside each adjustment through hole 12. The worktable 1 is connected to the frame through the adjustment screws 14. By providing several adjustment through holes 12 at four locations on the surface of the worktable 1, during installation, the thrust washers 13 are installed first. The thrust washers 13 can be fixed inside the adjustment through holes 12 by using hexagon countersunk screws. Limiting washers can be installed between the adjustment screws 14 and the thrust washers 13. The worktable 1 can be locked to the frame by adjusting the screws 14. During installation, another thrust washer 13 and a nut also need to be installed at the rear of the worktable 1. This connection structure allows for adjustment of the installation position of the worktable 1, facilitating the adjustment of its front and rear vertical position.
[0035] It should be noted that several mold base pressure blocks 15 are also provided on the outside of the worktable 1. These mold base pressure blocks 15 can be detachably set on the worktable 1, and are distributed at intervals along the length of the worktable 1. Before bending, the mold needs to be installed on the worktable 1. The installation position of the mold base pressure blocks 15 can be adjusted to facilitate the installation of the mold on the mold base pressure blocks 15, thereby adjusting the installation position of the mold on the worktable 1.
[0036] The structure in this embodiment enables adaptive compensation of the worktable 1 during the bending process, ensuring more accurate bending angle of the sheet metal, resulting in higher overall straightness of the bent sheet metal workpiece and reducing deformation of the sheet metal workpiece.
[0037] In Example 2, to address the issue of large deformation at both ends of the workbench 1 and to adjust the required deformation amount, the following is implemented: a placement slot 3 for mounting the gap limiting component 2 is provided at one end of the strip-shaped through groove 11. The gap limiting component 2 includes a fixing block 21, which is adapted to the placement slot 3. A fixing shaft 22 is inserted through the top of the fixing block 21, and an adjusting sleeve 23 is sleeved on the outside of the fixing shaft 22. The adjusting sleeve 23 includes a movable top sleeve 231 and a supporting bottom sleeve 232. The bottom of the movable top sleeve 231 is fitted with the top of the supporting bottom sleeve 232, and an annular step is provided.
[0038] In this embodiment, it should be added that by extending the middle of the placement slot 3 upward to provide a snap-fit part 31, and by providing a slot 211 at the bottom of the fixing block 21 that is compatible with the snap-fit part 31, and by providing through holes for inserting locking screws in both the snap-fit part 31 and the slot 211, when the gap limiting component 2 is installed on the placement slot 3, the slot 211 of the fixing block 21 can be engaged with the snap-fit part 31 of the placement slot 3, and locked by locking screws, so that the fixing block 21 and the placement slot 3 are stably connected, and the gap limiting component 2 is installed on the placement slot 3.
[0039] It should also be noted that, by having a limiting part 221 protruding from the bottom of the fixed shaft 22 that abuts against the top of the fixed block 21, and by also providing a washer 222 on the outside of the fixed shaft 22 so that the washer 222 is located at the bottom of the supporting bottom sleeve 232, during the assembly of the gap limiting component 2, the fixed block 21 needs to be inserted into the placement slot 3, the fixed shaft 22 needs to be vertically inserted through the top of the fixed block 21, and the washer 222 needs to be fitted on the outside of the fixed shaft 22. The limiting part 221 of the fixed shaft 22 plays a limiting role for the washer 222 and the adjusting sleeve 23.
[0040] In particular, the annular step is provided with several compensating steps, which are arranged in ascending order along the axial direction of the adjusting sleeve 23. When the deformation at both ends of the worktable 1 is too large, the position of the movable top sleeve 231 can be adjusted so that the annular step of the movable top sleeve 231 is pressed against the annular step of the supporting bottom sleeve 232. This allows the deformation at both ends of the worktable 1 to be compensated by controlling the axial height of the adjusting component. It should be noted that during the adjustment process, if the deformation at both ends of the worktable 1 is too large, the top of the movable top sleeve 231 is not in contact with the bottom of both ends of the worktable 1. In this case, the position of the movable top sleeve 231 can be adjusted by lifting the movable top sleeve 231 and rotating it in the direction of increasing step height, so that the overall axial height of the adjusting component can compensate for the deformation at both ends of the worktable 1.
[0041] In addition to the above, the compensation steps can be set with 12 segments, and the height difference between two adjacent compensation steps is ±0.2mm. The movable top sleeve 231 can be moved by lifting and rotating. During the movement, it can be adjusted by 2mm. In addition, the axial height of the overall adjustment sleeve 23 can be adjusted with the help of the washer 222 during the adjustment process.
[0042] In conjunction with Embodiments 1 and 2, it is particularly important to note that the advantages of this structure are as follows: due to the high cost of existing automatic deflection compensation tables, which also require routine maintenance, the new structure eliminates the need for compensation tables and subsequent maintenance, while reducing costs, simplifying the structure, lowering maintenance costs, and making it easy to use.
[0043] The present invention has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to the present invention. Furthermore, it is understood that the steps in the method of the present invention embodiments can be adjusted, combined, and deleted according to actual needs, and the structure in the device of the present invention embodiments can be combined, divided, and deleted according to actual needs.
[0044] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A sheet metal bending machine adaptive compensation structure, characterized in that, include: A worktable and clearance limiting assembly fixed to the frame; Both ends of the worktable are inclined with strip-shaped through grooves. One end of the strip-shaped through groove extends to the outside of the worktable, and one end of the strip-shaped through groove is also provided with a placement slot for installing the gap limiting component. The other end of the strip-shaped through groove is provided with a mounting hole, and a central shaft is inserted inside the mounting hole. The gap limiting component includes a fixing block that is adapted to the placement slot. A fixing shaft is provided on the top of the fixing block, and an adjusting sleeve is sleeved on the outside of the fixing shaft. The adjusting sleeve includes a movable top sleeve and a supporting bottom sleeve, and the bottom of the movable top sleeve and the top of the supporting bottom sleeve are matched and provided with an annular step.
2. The self-adaptive compensation structure of a sheet metal bending machine according to claim 1, characterized in that, Both of the two strip-shaped through slots are inclined upwards, the two strip-shaped through slots are symmetrically positioned, and the other ends of both strip-shaped through slots are close to the middle of the worktable.
3. The self-adaptive compensation structure of a sheet metal bending machine according to claim 1, characterized in that, The middle of the slot is provided with a snap-fit part extending upward, and the bottom of the fixing block is provided with a slot that matches the snap-fit part. Both the snap-fit part and the slot are provided with through holes for inserting locking screws.
4. The self-adaptive compensation structure of a sheet metal bending machine according to claim 1, characterized in that, The bottom of the fixed shaft protrudes outward to form a limiting part that abuts against the top of the fixed block, and a washer is also fitted on the outside of the fixed shaft, the washer being located at the bottom of the supporting bottom sleeve.
5. The self-adaptive compensation structure of a sheet metal bending machine according to claim 1, wherein, The annular staircase is provided with several compensation steps, which are arranged in ascending order along the axial direction of the adjusting sleeve.
6. The self-adaptive compensation structure of a sheet metal bending machine according to claim 1, wherein, The surface of the workbench is also provided with several adjustment through holes, and thrust washers are fixedly installed in several of the adjustment through holes. Adjustment screws are also inserted inside the several adjustment through holes. The workbench is connected to the frame through the adjustment screws.
7. The self-adaptive compensation structure of a sheet metal bending machine according to claim 1, wherein, The workbench is also provided with several mold base pressing blocks on its exterior. These mold base pressing blocks are detachably mounted on the workbench and are distributed at intervals along the length of the workbench.