SU732047A1 - Device for straightening metal rods - Google Patents

Description

The invention relates to the processing of metals by pressure, in particular to dressing devices. A device for straightening metal rods containing fixed stationary sections and movable saw sections with a drive mounted on a frame, as well as rigid and elastic supports of moving regular sections 1 is known. However, the known device is not very reliable and the life of its supports is limited. The purpose of the invention is to increase the reliability of the device. This goal is achieved due to the fact that each rigid support of the movable regular sections is made in the form of a body and placed in it circumferentially perpendicular to the axis of editing of a set of balls, and each elastic support is made in the form of a glass and a set of elastic elements of different rigidity and installed with the possibility of adjusting the movement perpendicular to the axis of the straightening. FIG. 1 shows the general appearance of the solution; in fig. 2 - view of the movable section; in fig. 3 - version of the extension of the elastic support; in fig. 4 shows an embodiment of an elastic support and a graph of the change in compression forces. On the bed 1, fixed sections 2 and glasses 3 adjustable elastic supports 4 of movable sections 5 are fixed. Adjustable elastic supports 4 that receive loads in the plane of oscillation (mobile sections 5 contain a set of elastic elements, for example, springs b and 7, which have different stiffness and more rigid the elements are shorter. The movable and fixed sections contain pressure elements 8, for example, in the form of three-roller devices, through which recirculation rod 9 is passed through. Loads arising along the direction of movement with The strums are perceived by ball bearings 10, made in the form of flat sets of balls placed in the housing 11. The moving sections are driven by vibration exciters 12 by means of balls 13 connected by a synchronizer 14. For example, a set of elastic elements can

consist of springs b, 7 and rubber ring 15,

The device works as follows.

The end of the rod 9, wound in a coil, is passed between the diluted pressure rollers. elements 8, fixed 2 and movable 5 sections of the correct device to the tangible mechanism (not shown). After refilling the rod, the device is actuated. At the same time, the pulling mechanism starts working and the moving sections 5 begin to oscillate along a circular path, and the adjacent sections oscillate in opposite phases, since the unbalances of the vibration exciters 12 of the adjacent sections are shifted by 180 and synchronized both in each section and between the sections. The bending of the rod 9 occurs in the same plane, which rotates with the number of revolutions equal to the frequency of oscillation of the sections, leading to a bulk plastic deformation of the rod.

In the course of operation, the disturbing force is perceived by the rod or rods if the mechanism is designed for the simultaneous stretching of several rods. The supports, when fully using the power during the editing process, are not loaded due to the presence of a gap between the elastic supports 4 and the movable sections 5. The supports 4 only stabilize the position of the sections in their vibration planes. After the straightening and the end of the rod (s) from the straightening mechanism are completed, the disturbing force is perceived alternately by resilient elements (springs 6, 7, etc.) of the set, and at first less rigid. Such a support structure allows not to waste energy on overcoming the resistance of elastic supports in the process of dressing, which leads to a significant increase in service life and does not allow a sharp increase in the amplitude of the oscillations of sections immediately after the end of the dressing, since the supports, especially short elements, can be made with a sufficiently large stiffness. The latter is possible due to the fact that they are not loaded in the editing process.

The elastic supports 4 can be moved along / on their axis to adjust the gap between them and the movable sections 5. A larger gap is needed when straightening rods of small diameters, and a smaller gap is necessary when straightening rods of large diameters. When the disturbing forces are not completely balanced by the force of the straightening, the elastic supports are partially loaded.

Section 1 (Fig. 4) shows the elastic characteristic of the straightened rod. In section 11, the elastic force of the rod and the less rigid element of the spring 6 are summed. In section 111, a more rigid elastic element (spring 7) enters the work, and the elastic force of the rod is summed up on it if editing is still taking place, and the resistance forces of the springs 6 and 7. If the straightening process is over, then on the plot 111 of the graph, only the resistance forces of the springs 6 and 7 are summed, and on the plot IV - the springs 6, 7 and the elastic element 14.

The shift of sections 5 along the axis of the dressing mechanism; is eliminated due to the presence of ball bearings 10 supported on the flat surfaces of the bed 1. The best conditions for rolling the balls will be in ring supports. Assembly of the supports can be done with a grease.

The economic effect is determined by an increase in reliability and an increase in the service life of both the supports and the machine as a whole, since in the process of editing with full use of power, the vibration load will not be transmitted to the machine through the supports, but will be balanced by. the rod being straightened, and only a small part of the vibration will be transmitted through the rod and fixed supports, which is significantly less compared with the known devices. In case of incomplete use of the power transmitted to the frame through the supports, vibration can be reduced and even by adjusting the static moment of the unbalance of the moving sections.

Claims (1)

1. USSR author's certificate No. 539640, B 21 D 3/16, B 21 F 1/02, 1975 (prototype), . , V-.y: - , V.- g. .1., -I-.  : V,.; ../x/-