Bending mechanism of bending machine

Abstract

The invention relates to a novel bending mechanism for a bending machine. The bending mechanism comprises a frame, a first rotating roller, a first rotating roller driving mechanism, a first upper pressing plate, a first lower pressing swinging bracket, a first lower pressing plate, a first lower pressing plate guiding mechanism, a first lower pressing plate driving mechanism and a follower plate, wherein the first lower pressing plate driving mechanism drives the first lower pressing plate to slide along the first lower pressing plate guiding mechanism to enable the first lower pressing plate to be near to or far away from the first upper pressing plate; an inner shaft is pivoted on the frame; an inner shaft driving mechanism capable of driving the inner shaft to rotate is arrange between the frame and the inner shaft; a follower plate swinging bracket rotating along the inner shaft is mounted on the inner shaft; the follower plate is mounted on the follower plate swinging bracket to rotate surrounding the inner shaft along the follower plate singing bracket to allow the follower plate in rotation to drive the workpiece clamped between the first upper pressing plate and first lower pressing plate to be bent by surrounding the first bending roller. The novel bending mechanism is simple in structure, can realize secondary bending, and brings convenience to bend the workpiece to be G-shaped or U-shaped.

Description

technical field [0001] The invention relates to a bending machine, in particular to a bending mechanism of the bending machine. Background technique [0002] As a compact heat exchanger, the tube-fin heat exchanger has a wide range of applications in the refrigeration industry. The forming process of the heat exchanger mainly includes the following three forming processes: tube bending forming (forming U-shaped tubes), mechanical expanding tube forming (realizing tube-fin connection), tube bundle bending forming (forming L-shaped or U-shaped or G-shaped Heat Exchanger). Tube bundle bending is one of the key processes in heat exchanger forming, which has an important impact on the performance of heat exchangers. [0003] When the tube bundle is bent and formed, the heat exchanger is first transported to the specified position, so that the part to be bent is close to the bending die (roller) with a predetermined bending radius, and then clamped on both sides of the bending d...

AI Technical Summary

Problems solved by technology

[0004] The structure of the existing bending machine is complex. Generally, the whole machine is bent by a single roller. To realize U-shaped or G-shaped bending, the workpiece needs to be repositioned many times before bending. The process is complicated, the continuity is poor, and the production efficiency is low.

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