Swing type diameter changing mechanism of spring machine

Abstract

A swing type diameter changing mechanism of a spring machine comprises a sliding plate type post rod swing device and a connecting rod flexible swing device, and a hinge pin of the sliding plate type post rod swing device is connected onto a front wall plate of the spring machine. A post rod and a lead screw nut are fixed on a sliding plate of the sliding plate type post rod swing device, and when a lead screw I fixed on a reduction gearbox output shaft rotates, the post rod is driven to advance and retreat. A cylinder body arranged at the rear end of a connecting rod of the connecting rod flexible swing device can slide in an inner wall of a guide sleeve, and when a lead screw II fixed on the reduction gearbox output shaft rotates, the connecting rod can be driven to advance and retreat. The front end of the connecting rod and a slide rest hinge pin are connected, the slide rest is driven by the connecting rod to swing during advancing and retreating of the connecting rod, and the sliding plate and the connecting rod are controlled to advance and retreat respectively by a programmable logic controller. The sliding plate type post rod swing device and the connecting rod flexible swing device can separately swing, accordingly inclination angle of the post rod is changed all along during the moving process, and further the best force application direction to steel wires can be guaranteed. An arc-shaped sliding tenon arranged at the front end of the sliding slide rest and a pressing plate fixed on the front wall plate are matched, and accordingly swing track of the sliding plate type post rod swing device is more accurate.

Description

technical field [0001] The invention relates to the field of spring winding machinery, in particular to a swing-type diameter-reducing mechanism of a spring machine. Background technique [0002] The reducing mechanism is a key part that must be possessed by the steel wire spring winding machine. During the spring winding process, the steel wire is forced to be sent out and moves in one direction. There must be a push rod or roller of the reducing mechanism in several positions and from different directions. Push the steel wire upward to change the forward direction of the steel wire so that the steel wire can be wound into a spring. To wind various springs with different outer diameters and different rotation directions, it is necessary to adjust the force application direction and force application position of each ejector pin. As a result, a movable spring machine variable diameter mechanism has appeared on the domestic market. Its basic features are: there is a vertica...

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Problems solved by technology

But no matter where it moves, the angle of inclination between the ejector rod and the vertical direction is fixed, that is, the direction of force applied to the steel wire is always the same. When the ejector rod moves to the limit position of the edge machine, for example, the upper left corner Or the lower right corner, the steel wire will break away from the groove at the front end of the ejector rod and contact the side of the ejector rod. In this way, the manufacturing accuracy and stability of the spring cannot be guaranteed, making it difficult to effectively control the quality of the spring

Moreover, the two groups of slide plate devices of this structure are stacked up and down, so that the diameter-reducing mechanism is increased, and the rigidity of the horizontal thrust transmission link of the slide plate is reduced; The output is more, which greatly reduces the rigidity and stability of the winding mechanism. This defect is especially prominent when winding large and medium-sized springs.

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