Flexible bending center clamping plate structure

Abstract

The utility model discloses a flexible bending center clamping plate structure which comprises a machine base, a machine frame is connected to the top of the machine base, a bending groove used for bending a plate is formed in the center of the top of the machine base, fixing assemblies are arranged on the surface of the machine base and located on the two sides of the bending groove, and an adjusting assembly used for adjusting the bending angle of the plate is arranged in the bending groove. A forward and reverse thread lead screw of the adjusting assembly is rotated to rotate and drive the two modules to move, the distance between the two modules is adjusted, and the forward and reverse thread lead screw in the adjusting assembly is matched with the modules, so that an operator can adjust the distance between the two modules according to specific process requirements. The distance between the two sets of modules is adjusted by rotating the positive and negative tooth lead screws through the rotating shafts, so that the arrangement of various bending angles from acute angles to obtuse angles and the like is achieved, various bending angles can be achieved in the plate bending process, different process requirements are met, the diversity and adaptability of products are greatly improved, and the machining requirements can be better met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of bending machine technology, and specifically relates to a flexible bending center clamping plate structure. BACKGROUND

[0002] The bending machine is a workpiece forming machine designed for cold rolling sheet metal processing, and is widely used in sheet bending processing in the automobile and aircraft manufacturing industries. In order to avoid the movement of the sheet during bending, the existing bending machine generally sets up a clamping plate structure to press the two ends of the sheet, which facilitates subsequent bending.

[0003] The existing clamping plate structure of the bending machine generally moves the clamping plate downward by the piston rod of the cylinder to press the two ends of the sheet, thereby avoiding the movement of the sheet during subsequent bending. However, the bending machine cannot adjust the bending angle of the sheet according to the specific process requirements during the bending process of the sheet, so it cannot bend the sheet with different bending angles, which limits the bending angle range of the sheet and makes it inconvenient. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a flexible bending center clamping plate structure to solve the problems in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a flexible bending center clamping plate structure, comprising:

[0006] A machine base is provided with a rack at the top, a bending groove for bending the sheet is provided at the center of the top of the machine base, and a fixing assembly for fixing the sheet is provided on the surface of the machine base and located on both sides of the bending groove. Two groups of clamping plates are moved by two groups of first cylinders of the fixing assembly to press and fix the two ends of the sheet.

[0007] An adjusting assembly for adjusting the bending angle of the sheet is provided in the bending groove. The positive and negative thread rods of the adjusting assembly are rotated to move two groups of modules, and the distance between the two groups of modules is adjusted.

[0008] Preferably, the adjusting assembly comprises a rotating shaft and a sliding groove, the sliding groove is provided with two groups and is provided in the machine base, two groups of modules are respectively slidingly connected in the two groups of sliding grooves, and a rotating groove is provided in the machine base and located at the bottom of the sliding groove.

[0009] Preferably, the positive and negative toothed lead screw is rotationally connected in a rotating groove, the bottom of the module is movably penetrated through the slot in the base and is transmissionally connected to the surface of the positive and negative toothed lead screw through the lead screw nut, and one end of the rotating shaft is connected with the positive and negative toothed lead screw and the other end is rotationally penetrated through the base and is connected with the self-locking hand lever.

[0010] Preferably, the two groups of modules are provided with openings and the openings are slidably connected with bottom plates, the openings are connected with guide rods and the other ends of the guide rods are slidably penetrated through the guide grooves provided in the modules.

[0011] Preferably, the surface of the guide rod is sleeved with a spring and the two ends of the spring are connected with the base and the bottom plate respectively.

[0012] Preferably, the fixing assembly comprises L-shaped frames, the L-shaped frames are provided with two groups and are connected with the surface of the base respectively, the first air cylinder is arranged at the top of the L-shaped frame and the piston rod of the first air cylinder is movably penetrated through the L-shaped frame and is connected with the clamping plate.

[0013] Preferably, the bottom of the clamping plate is rollingly connected with a plurality of ball bearings.

[0014] Preferably, the top of the base is provided with a second air cylinder and the piston rod of the second air cylinder is movably penetrated through the base and is connected with the elbow.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] (1) the positive and negative toothed lead screw in the adjusting assembly cooperates with the module, so that the operator can adjust the distance between the two groups of modules by rotating the rotating shaft to rotate the positive and negative toothed lead screw according to the specific process requirement, thereby realizing the setting of a plurality of different bending angles from an acute angle to an obtuse angle and enabling the plate to realize a plurality of bending angles in the bending process, meeting different process requirements and greatly improving the diversity and adaptability of products and better meeting the processing demand.

[0017] (2) the two groups of first air cylinders of the fixing assembly drive the clamping plate to move, can provide sufficient pressing force to press and fix the two ends of the plate, and the ball bearings rollingly connected with the bottom of the clamping plate can enable the plate to be bent into the bending groove while being pressed during bending, avoiding the limitation of the bending movement. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a structural schematic view of the utility model;

[0019] Fig. 2 It is a sectional view of the utility model;

[0020] Fig. 3 It is a structural schematic view of the module and the transmission connection of the positive and negative toothed lead screw.

[0021] Fig. 1, base; 2, frame; 3, plate; 4, bending groove; 5, positive and negative tooth screw rod; 6, module; 7, first cylinder; 8, clamping plate; 9, rotating shaft; 10, sliding groove; 11, bottom plate; 12, guide rod; 13, guide groove; 14, spring; 15, L-shaped frame; 16, ball; 17, second cylinder; 18, bending head; 19, self-locking hand lever. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0023] The utility model provides a kind of flexible bending center clamping plate structure as Figs. 1-3 As shown in the figure, it comprises:

[0024] Base 1, the top of the base 1 is connected with frame 2, the top center of the base 1 is equipped with bending groove 4 for bending plate 3, the surface of the base 1 and located on both sides of the bending groove 4 is equipped with fixing assembly for fixing plate 3, two groups of clamping plates 8 are moved by two groups of first cylinders 7 of the fixing assembly, so that two groups of clamping plates 8 are respectively pressed and fixed to both ends of plate 3.

[0025] Adjusting assembly for adjusting the bending angle of plate 3 is equipped in the bending groove 4, the positive and negative tooth screw rod 5 of the adjusting assembly is rotated and drives two groups of modules 6 to move, and the spacing between the two groups of modules 6 is adjusted.

[0026] The adjusting assembly comprises rotating shaft 9 and sliding groove 10, the sliding groove 10 is equipped with two groups and is equipped in the base 1, two groups of modules 6 are respectively slidably connected in two groups of sliding grooves 10, rotating groove is equipped in the base 1 and located at the bottom of the sliding groove 10.

[0027] The positive and negative tooth screw rod 5 is rotatably connected in the rotating groove, the bottom of the module 6 is movably penetrated into the slot in the base 1, and then is drivingly connected to the surface of the positive and negative tooth screw rod 5 through screw nut, and the bottom of the module 6 is slidably connected with the sliding groove in the base 1 through sliding block, one end of the rotating shaft 9 is connected with the positive and negative tooth screw rod 5, the other end is rotatably penetrated into the base 1 and connected with the self-locking hand lever 19, when the self-locking hand lever 19 is screwed, the positive and negative tooth screw rod 5 can be rotated by the rotating shaft 9, and the self-locking hand lever 19 has self-locking function, when the self-locking hand lever 19 is rotated to the specified position, the rod body will be automatically locked, to avoid that the self-locking hand lever 19 will be loose after screwing and cause the module 6 to move.

[0028] Two groups of modules 6 are provided with openings and bottom plates 11 are slidably connected in the openings, guide rods 12 are connected in the openings and the other ends of the guide rods 12 slidably penetrate guide grooves 13 provided in the modules 6, when the two groups of modules 6 move, the bottom plates 11 can relatively slide along the direction of the guide rods 12 in the openings of the two groups of modules 6, and the stability of the movement of the modules 6 can be enhanced by the guide rods 12.

[0029] The guide rods 12 are sleeved with springs 14 and the two ends of the springs 14 are connected with the base 1 and the bottom plates 11 respectively.

[0030] The fixing assembly comprises L-shaped frames 15, the L-shaped frames 15 are provided in two groups and are connected with the surface of the base 1 respectively, the first cylinders 7 are arranged on the top of the L-shaped frames 15 and the piston rods of the first cylinders 7 are movably penetrated through the L-shaped frames 15 and are connected with the clamping plates 8, when the piston rods of the first cylinders 7 are extended, the clamping plates 8 are pushed to move downwards, the clamping plates 8 are contacted with the plate 3 and the two ends of the plate 3 are compressed

[0031] The clamping plates 8 are rollingly connected with a plurality of balls 16 at the bottom, the balls 16 play a rolling support role and convert the sliding friction between the plate 3 and the clamping plates 8 into rolling friction.

[0032] The base 2 is provided with a second cylinder 17 at the top and the piston rod of the second cylinder 17 is movably penetrated through the base 2 and is connected with a bending head 18, when the piston rod of the second cylinder 17 is extended, the bending head 18 is pushed to move downwards, pressure is applied to the plate 3 located at the bending groove 4, the plate 3 is deformed to be bent along the shape of the bending groove 4.

[0033] The flexible bending center clamping plate structure firstly places the plate 3 to be bent above the bending groove 4 on the top of the base 1, the two ends of the plate 3 are located at the bottom of the two groups of clamping plates 8, then the two groups of first cylinders 7 in the fixing assembly are started, the piston rods of the first cylinders 7 are extended, the clamping plates 8 are pushed to move downwards, the clamping plates 8 are contacted with the plate 3 and the plate 3 is compressed, the size of the compression force can be controlled by adjusting the air pressure or stroke of the first cylinders 7, and it is ensured that the plate 3 does not move and deviate during the bending process.

[0034] According to the bending angle required by the process, the operator rotates the self-locking hand lever 19, the self-locking hand lever 19 drives the rotating shaft 9 to rotate, and then the positive and negative toothed rod 5 rotates in the rotating groove. Due to the special thread structure of the positive and negative toothed rod 5, the two groups of modules 6 will move relatively or oppositely in the sliding groove 10. By controlling the rotation angle and direction of the positive and negative toothed rod 5, the spacing between the two groups of modules 6 can be adjusted. When the spacing between the modules 6 changes, the bending fulcrum and stress condition of the plate 3 at the bending groove 4 change, thereby realizing the adjustment of different bending angles. When the two groups of modules 6 move, the bottom plate 11 can slide relatively in the opening of the two groups of modules 6 along the direction of the guide rod 12, so that the bottom plate 11 has adjustability in the two groups of modules 6, and the stability of the movement of the modules 6 can be enhanced through the guide rod 12;

[0035] After the angle adjustment is completed, the second cylinder 17 at the top of the rack 2 is started, the piston rod of the second cylinder 17 is extended, the bending head 18 is pushed to move downward, the plate 3 located at the bending groove 4 is pressed, and the plate 3 is deformed along the shape of the bending groove 4. During the bending process, the fixed assembly always maintains the pressing state of the plate 3,

[0036] When the plate 3 starts to bend into the bending groove 4 in the pressing state, the ball 16 plays a rolling support role, and the sliding friction between the plate 3 and the clamping plate 8 is converted into rolling friction. The friction of rolling friction is far less than that of sliding friction, which greatly reduces the resistance of the plate 3 during the bending process. This makes the plate 3 bend into the bending groove 4 more easily and smoothly, avoiding problems such as limited bending movement, surface scratching of the plate 3 and inaccurate bending angle caused by excessive friction;

[0037] After the bending is completed, the piston rods of the first cylinder 7 and the second cylinder 17 are retracted, the bending head 18 rises back to the initial position, the clamping plate 8 releases the pressing of the plate 3, and the processed plate 3 is taken out. At this time, the equipment can prepare for the bending processing of the next plate 3.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A flexible bending center clamp structure, characterized in that, include: A base (1) is connected to a frame (2) at the top. A bending groove (4) for bending the plate (3) is provided at the center of the top of the base (1). Fixing components for fixing the plate (3) are provided on the surface of the base (1) and on both sides of the bending groove (4). Two sets of first cylinders (7) of the fixing components drive two sets of clamping plates (8) to move so that the two sets of clamping plates (8) press and fix the two ends of the plate (3) respectively. The bending groove (4) is provided with an adjustment component for adjusting the bending angle of the plate (3). By rotating the positive and negative threaded rods (5) of the adjustment component, the two sets of modules (6) are moved, and the distance between the two sets of modules (6) is adjusted.

2. The flexible bending center clamping plate structure according to claim 1, characterized in that: The adjustment assembly includes a rotating shaft (9) and a sliding groove (10). The sliding groove (10) has two sets and is located in the base (1). The two sets of modules (6) are slidably connected in the two sets of sliding grooves (10). The base (1) has a rotating groove located at the bottom of the sliding groove (10).

3. The flexible bending center clamping plate structure according to claim 2, characterized in that: The positive and negative threaded rod (5) is rotatably connected in the rotating groove. The bottom of the module (6) is movable through the slot in the machine base (1) and is connected to the surface of the positive and negative threaded rod (5) through the threaded rod nut. The bottom of the module (6) is slidably connected to the sliding groove in the machine base (1) through the slider. One end of the rotating shaft (9) is connected to the positive and negative threaded rod (5), and the other end is rotatably connected to the self-locking hand crank (19) after passing through the machine base (1).

4. The flexible bending center clamping plate structure according to claim 1, characterized in that: Both modules (6) have openings and a base plate (11) is slidably connected inside the openings. A guide rod (12) is connected inside the openings and the other end of the guide rod (12) slides through the guide groove (13) provided inside the module (6).

5. The flexible bending center clamping plate structure according to claim 4, characterized in that: The guide rod (12) is fitted with a spring (14), and the two ends of the spring (14) are connected to the base (1) and the bottom plate (11) respectively.

6. The flexible bending center clamping plate structure according to claim 1, characterized in that: The fixing component includes an L-shaped frame (15), which has two sets and is respectively connected to the surface of the base (1). The first cylinder (7) is located on the top of the L-shaped frame (15), and the piston rod of the first cylinder (7) moves through the L-shaped frame (15) and is connected to the clamping plate (8).

7. The flexible bending center clamping plate structure according to claim 1, characterized in that: The bottom of the clamp (8) is connected to several ball bearings (16).

8. The flexible bending center clamping plate structure according to claim 1, characterized in that: The top of the frame (2) is provided with a second cylinder (17), and the piston rod of the second cylinder (17) moves through the frame (2) and is connected to the bending head (18).

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