Cam lever flanging mechanism with follow-up hold-down function

Abstract

The application discloses a cam lever edge folding mechanism with follow-up pressing function and belongs to the technical field of thin workpiece machining equipment. The mechanism comprises an H-shaped support, a feeding driving assembly, a four-bar linkage folding mechanism and a cam lever pressing assembly. The feeding driving assembly can drive the support to move forward and backward as a whole, and the four-bar linkage folding mechanism cooperates with a suction plate to complete 180-degree folding operation of the thin workpiece. The cam lever pressing assembly relies on a fixed cam contour guide rail, a pressure lever and a lever tension spring form a linkage structure, when the mechanism is in standby, the cam presses the roller to make the pressing wheel lift up, when the feeding operation is performed, the cam is separated from the constraint, the tension spring drives the lever to realize the edge folding follow-up pressing. The application relies on the feeding displacement mechanical linkage to realize the pressing action, does not need an additional pressing driving source, has a simple structure, can effectively overcome the workpiece edge folding rebound defect and improves the sheet edge folding consistency and the machining efficiency.

Description

Technical Field

[0001] This invention relates to the field of thin workpiece processing equipment, and in particular to a cam lever folding mechanism with follow-up clamping function, which is suitable for automated folding operations of various thin workpieces such as paper, aluminum foil, and plastic sheets. Background Technology

[0002] After thin workpieces are folded 180°, the folded edge is prone to springback and warping. Currently, the industry generally uses a rolling mill to complete the folding and pressing operation, and in some cases, manual pressing is still used for shaping. Using a rolling mill requires a separate rolling drive component, resulting in a large number of parts, a complex control system, and high equipment costs. Manual pressing is labor-intensive, has poor processing consistency, and low production efficiency. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a cam lever bending mechanism with follow-up clamping function. While completing the feeding and retraction, the mechanism realizes the follow-up clamping of the bending by means of the linkage of the cam profile, lever and tension spring combination structure. It does not require an additional clamping drive source, simplifies the overall structure, suppresses the springback of the workpiece bending, and improves the bending forming quality.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a cam lever folding mechanism with follow-up clamping function, comprising an H-shaped support, a feed drive assembly, a four-bar folding mechanism, and a cam lever clamping assembly.

[0005] The feed drive assembly includes a guide rail screw bracket (4), a linear guide rail (6), a linear guide rail drive motor (5), and a threaded slider (3). The linear guide rail (6) is mounted on the guide rail screw bracket (4), and the linear guide rail drive motor (5) drives the screw to move the threaded slider (3) back and forth along the linear guide rail (6). The H-shaped support (1) is fixedly mounted on the threaded slider (3) and follows the threaded slider (3) in the overall back and forth feed motion.

[0006] The four-bar folding mechanism (12) is assembled on the H-shaped support (1). The output end of the four-bar folding mechanism (12) is connected to the adsorption plate (13). The adsorption plate (13) is used to adsorb the thin workpiece to be processed. The four-bar folding mechanism (12) drives the adsorption plate (13) to complete the 180° folding action of the workpiece.

[0007] The cam lever clamping assembly includes a lever spring (2), a fixed cam profile guide rail (7), a bearing roller (8), a pressure lever (9), a lever shaft (10), and a pressure roller (11).

[0008] The fixed cam profile guide rail (7) is fixedly installed on the guide rail screw bracket (4) through small holes on both sides. It is a static fixed component and does not move.

[0009] The pressure lever (9) is hinged to the lower side of the H-shaped support (1) via a lever pivot (10). A bearing roller (8) is mounted on one end of the pressure lever (9), and a pressure roller (11) is mounted on the other end. The lever tension spring (2) is connected to the H-shaped support (1) and the pressure lever (9) at both ends. The bearing roller (8) abuts against the lower contour surface of the fixed cam profile guide rail (7).

[0010] In the initial standby state of the equipment, the H-type support (1) is in the initial standby position of the linear guide rail (6). The bearing roller (8) is pressed downward by the fixed cam profile guide rail (7), and the pressure lever (9) is pressed downward at its rear end with the lever shaft (10) as the fulcrum, while the pressure roller (11) at the front end tilts upward and rises away from the workpiece. At this time, the lever spring (2) is stretched and stores tension.

[0011] After the four-bar linkage folding mechanism (12) drives the adsorption plate (13) to complete the 180° folding of the thin workpiece, the linear guide drive motor (5) drives the threaded slider (3) to move the H-shaped support (1) forward as a whole. The H-shaped support (1) moves forward together with the pressure lever (9) and the bearing roller (8). The bearing roller (8) moves forward along the contour of the fixed cam profile guide rail (7) and gets out of the pressure constraint of the cam profile guide rail. The stretched lever spring (2) pulls the rear end of the pressure lever (9). After the lever shaft (10) reverses the lever direction, the pressure roller (11) at the front end of the pressure lever (9) swings downward and presses the folded edge of the workpiece that has been folded.

[0012] When the feed retracts, the H-type support (1) returns to the initial standby position, the bearing roller (8) re-contacts the profile of the fixed cam profile guide rail (7), the rear end of the pressure lever (9) is pressed down again, the pressure roller (11) is lifted up again, the lever spring (2) is stretched again, and the mechanism returns to the initial standby state. Beneficial effects The cam lever clamping assembly of this mechanism is mounted on an H-shaped support and moves forward and backward synchronously with the feed assembly. Relying on the fixed cam profile guide rail, the pressure lever, and the lever spring, the clamping and lifting actions of the pressure rollers are achieved through feed displacement linkage, eliminating the need for an additional clamping motor or cylinder. Its streamlined structure makes it more suitable as an intelligent device for rapid bending of thin workpieces, effectively suppressing workpiece springback and warping, and improving the quality of the bending process. Attached Figure Description

[0013] Figure 1 This is a schematic diagram showing the overall disassembly of the mechanism of the present invention.

[0014] Figure 2 This is a schematic diagram comparing the standby state and the feeding and pressing operation state of the present invention.

[0015] Figure 3 This is a multi-view engineering view of the H-type support component.

[0016] Figure 4 This is an exploded view of the threaded slider component.

[0017] Figure 5 This is a disassembly diagram of the fixed cam profile guide rail component.

[0018] Figure 6 This is a schematic diagram showing the disassembly of the pressure lever assembly parts.

[0019] Figure 7 This is a schematic diagram of the clamping roller component.

[0020] Figure 8 This is a schematic diagram showing the difference in state before and after the adsorption plate is folded.

[0021] In the diagram, 1 is an H-shaped support, 2 is a lever spring, 3 is a threaded slider, 4 is a guide rail screw bracket, 5 is a linear guide drive motor, 6 is a linear guide, 7 is a fixed cam profile guide, 8 is a bearing roller, 9 is a pressure lever, 10 is a lever shaft, 11 is a pressure roller, 12 is a four-bar linkage folding mechanism, and 13 is an adsorption plate. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] In this embodiment, the specific structure of the four-bar folding mechanism (12) is as follows: multiple sets of movable hinges are arranged on the H-shaped support (1), and rods A, B, C, and D are hinged to each other to form a four-bar folding mechanism. The long shaft of the pendulum motor is mounted on the H-shaped support (1) with a simple beam structure and a bearing for rotational support. Rod D has two movable hinge holes and one fixed mounting hole. The two movable hinge holes are respectively hinged to rods C and B. The fixed mounting hole is sleeved on the long shaft of the pendulum motor and is fastened to the long shaft of the output through a locking structure to realize torque transmission, thereby forming the power input end. The output end of the four-bar folding mechanism is connected to the adsorption plate (13). One hinge fulcrum of the four-bar folding mechanism relies on the H-shaped support (1). During operation, it relies on the adsorption plate (13) to adsorb thin workpieces. The axis of the workpiece folding edge front edge is used as the equivalent constraint fulcrum to realize the swing folding around the axis.

[0024] The oscillating motor drives the four-bar folding mechanism to move, causing the adsorption plate (13) to complete the workpiece folding operation of about 180°. After the workpiece is released, the linear guide drive motor (5) drives the threaded slider (3), which in turn drives the H-shaped support (1). The entire four-bar folding mechanism and the adsorption plate (13) move along the linear guide (6) to feed and retract, moving away from the workpiece that has been folded and formed, and completing the return to the original position.

[0025] This device is suitable for thin workpieces of various materials such as paper, aluminum foil, and plastic sheets. Depending on the thickness of the workpiece, lever springs (2) with different elasticity specifications can be replaced to adjust the clamping force of the pressure roller (11).

Claims

1. A cam lever bending mechanism with follow-up clamping function, characterized in that, Includes H-type support, lever spring, threaded slider, guide rail screw bracket, linear guide drive motor, linear guide, fixed cam profile guide rail, bearing roller, pressure lever, lever shaft, pressure roller, four-bar linkage folding mechanism, and adsorption plate.

2. The cam lever flange follow-up clamping mechanism according to claim 1, characterized in that, The linear guide is fixedly installed on the guide rail screw bracket. The linear guide drive motor drives the screw to drive the threaded slider to slide back and forth along the linear guide. The H-shaped support is fixedly assembled on the upper end of the threaded slider and can follow the threaded slider to realize the overall back and forth feed displacement, thereby cooperating with the cam lever clamping assembly to complete the clamping and lifting actions.

3. The cam lever flange follow-up clamping mechanism according to claim 1, characterized in that, The four-bar folding mechanism is assembled and fixed on the H-shaped support. The output end of the four-bar folding mechanism is fixedly connected to the adsorption plate. The adsorption plate is used to adsorb and fix the thin workpiece to be processed. The four-bar folding mechanism can drive the adsorption plate to complete the 180-degree folding action of the workpiece. After the folding is completed, it cooperates with the cam lever clamping assembly to perform edge clamping.

4. The cam lever flange follow-up clamping mechanism according to claim 1, characterized in that, The fixed cam profile guide rail is fixedly installed on the guide rail screw bracket and remains stationary. The pressure lever is hinged to the lower side of the H-type support through the lever shaft. One end of the pressure lever is equipped with a bearing roller, and the other end of the pressure lever is equipped with a pressure roller. The two ends of the lever tension spring are respectively connected to the H-type support and the pressure lever.

5. The cam lever flange follow-up clamping mechanism according to claim 4, characterized in that, When the equipment is in the initial standby state, the bearing roller abuts against the lower contour surface of the fixed cam contour guide rail. The cam contour presses down on the bearing roller, causing the rear end of the pressure lever to be pressed down and move downward. The pressure roller rises upward and moves away from the workpiece, and the lever spring is in a stretched and energy-storing state.

6. The cam lever flange follow-up clamping mechanism according to claim 2, characterized in that, After the four-bar linkage folding mechanism completes the workpiece folding and releases the workpiece, the linear guide rail drive motor drives the threaded slider and H-shaped support to move forward as a whole. The bearing roller moves with the displacement and gets out of the pressure constraint of the fixed cam profile guide rail. The lever spring rebounds and pulls the pressure lever to swing, so that the pressure roller presses down to fit the workpiece folding edge position to achieve follow-up clamping.

7. The cam lever flange follow-up clamping mechanism according to claim 2, characterized in that, When the threaded slider drives the H-type support to retract and reset, the bearing roller re-fits the fixed cam profile guide rail profile, presses against the rear end of the pressure lever again, the pressure roller rises and resets, the lever spring stretches again to store energy, and the mechanism returns to the initial standby state.

8. The cam lever flange follow-up clamping mechanism according to claim 1, characterized in that, Different lever springs with different elasticity specifications can be replaced according to the thickness of the thin workpiece to achieve the appropriate adjustment of the pressure roller clamping force.

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