SU1743666A1 - Device for straightening long-size flexible members - Google Patents

Description

The invention relates to hardware production, mainly to devices for straightening long flexible elements made of steel wire.

The aim of the invention is to improve the quality of the straightening.

Figure 1 shows a diagram of the proposed device (one of its group of four rollers located in the same plane with the drive of their transverse movement); Fig. 2 shows a group of three rollers; in Fig. 3 a group of five rollers.

The group of rollers of the device presented in figure 2, includes four non-drive roller 1,2,34 located

The cantilever axis x 5 mounted on the rods 6 of the mechanisms for the transverse movement of the rollers. The mechanism for the transverse movement of each roller contains a hollow rod 6 having the possibility of translational movement inside the fixed fixed cup 7 self-braking screw gear with a nut 8 fixed to the rod 6, and the lead screw 9, which is passed through the inside of the hollow rod 6, the thrust bearings 10 or the swing 11, the friction 12 or the elastic 13 clutch. Friction clutches 12 and thrust bearings 10 are mounted on the mechanisms of cross-section

about

of the two extreme rollers 1 and 4, on the elastic clutches 13 and the rolling bearings 11 on the mechanisms of the two middle rollers 2 and 3. The rods 6 have a certain bearing surface for efficient transmission during friction when moving the rod 6 to the inner walls of the cups 7 from the cantilever force applied on the roller due to the action of the flexible element 14 on it. The mechanisms of transverse movement of all the rollers in the group are kinematically connected to each other by means of cylindrical gears 15. Coaxially with one of the cores ynih gear mechanism located on the transverse moving roller 1 is mounted bevel gear 16, sensing rotation of the other bevel gear 17, the pinion 17 is placed on a shaft 18 which is connected via a coupling 19 to the output shaft gear 20 driven by an electric motor 21.

The device contains several groups of rollers, for example, three, which provide a sufficiently uniform curvature of all wires, which are located around a circle of one radius in the cross section of a flexible element during its alignment. This is achieved by the fact that the planes of the straightening with corresponding groups of rollers located in them are successively rotated one relative to another in a plane perpendicular to the longitudinal axis of the flexible element by an angle equal to the division of the half arc of a circle by the number of planes.

The rollers 1,2,3,4 are arranged in a checkerboard pattern with respect to the longitudinal axis of the flexible element. Figure 1 shows the middle group of rollers. To transfer the rotation to the right group of rollers mounted in a different plane (in this case rotated relative to the average around the longitudinal axis of the flexible element by 60 °), use an sprocket 22 with a chain 23 located on the shaft 18. On the right group of rollers installed respectively the plane rotated 60 ° in the opposite direction, the rotational transmission is carried out using a similar sprocket 24 and chain 25. The shaft 18 is connected to the sprocket 24 by a cardan joint 26, which includes a running sleeve 27. In the plane of the right There is no cardan joint, the inclusion of a cardan joint in this design, 26 in two planes of the straightening makes it easy to adjust the tension of the chains 23 and 25.

The device works as follows.

To adjust the parameters of straightening

(deflections of the axis of the flexible element 14 under the rollers) from the diluted position of the rollers, which ensures convenient filling of the device by turning on the electric motor

21 rotates the shaft 18. Rotation is simultaneously transmitted through sprockets 22 and 24 through chains 23 and 25 to the left and right groups of rollers (leveling plane), and through gears 17 and 16 to the middle one.

the direction of rotation of the output shaft of the gearbox 20, for example, as indicated in Fig. 1, the cylindrical gears 15 rotate in the directions indicated by the arrows. At the same time, for all mechanisms of transverse movement of the rollers, lead screws 9 rotate, which, depending on the direction of their rotation, progressively move the rods 6 with the rollers placed on them to extend from glasses 7 or to retract, which is indicated by the corresponding arrows. Moreover, the adjustment of the parameters of the straightening is carried out after the flexible element 14 is already loaded onto the exhaust pulley

of the sewing machine (not shown in the diagram) and has a certain amount of axial tension.

Therefore, two extreme rollers 1 and 4 after approaching the surface of the flexible element and

when a certain force is reached, they cease their transverse movement due to the operation of the friction clutches 12, which are preset to this force, and thereby ensure a constant position of the longitudinal axis of the flexible element. At the same time, two middle rollers 2 and 3 continue counter-lateral movement to ensure the deflection of a flexible element of the required size, which is set and controlled by the operator on a scale or, for example, an automatic logic device. Due to the presence of a kinematic connection, these actions are simultaneously repeated for the other two

groups of device rollers.

At the end of the folding of the flexible element, the reverse direction of rotation of the shaft 18 is turned on, and all the rollers of the device return to their original diluted state, convenient for filling the flexible element. In this case, the lateral movement of the rollers 1 and 4 will begin only after the load is relieved on the rollers 2, 3, and on the rollers 1 and 4 it will not exceed the value ensuring the engagement of the friction clutches 12, which may occur at the moment when the rollers touch 2 and 3 with the surface of the flexible element.

The presence of the same distance between two adjacent rollers causes the use of all the gears 15 of the same diameter, which in turn ensures that the rollers almost simultaneously touch the surface of the flexible element when adjusting the straightening parameters and tearing them away during the reverse movement.

The design of the mechanisms for transverse movement of the fixing rollers includes, for example, thrust bearings, since the rotation of the driving screws 9 takes place only at their low axial loads and requires little effort to rotate them.

The circuit diagrams shown in Figures 2 and 3 have a similar construction as described above and only differ in the number of rollers in a group. Therefore, the device drive is not shown.

For a group of three rollers arranged in a staggered order with respect to the longitudinal axis of the flexible element and depicted in FIG. 2, the two extreme rollers are locking and their lateral movement mechanisms include friction clutches, and using the middle roller create the necessary deflection of the longitudinal axis of the flexible an item.

For a group of five rollers arranged in a checkerboard pattern and depicted in FIG. 3, the two outer rollers and the third middle roller are locking, and their lateral movement mechanisms include friction clutches. Using the two remaining rollers create the required parameters for straightening.

The device allows ensuring the constant position of the longitudinal axis of the flexible element regardless of the number of planes of the straightening for a different range of diameters of the straightening of the flexible elements.

Moreover, the use of, for example, a helical gear in the mechanisms of transverse movement of the rollers makes it possible to process flexible elements of large diameter, when the rollers experience considerable force, with sufficient simplicity of the design of the mechanisms and cost

relatively small efforts on the transverse movement of the rollers, which reduces the size and material consumption of the device. But this does not exclude the possibility of using

and other structures of the mechanisms of transverse movement of the rollers.

The presence of friction clutches in the device allows, with rigid kinematic coupling of all its rollers, their various transverse movements from a single drive, which simplifies the kinematics of the device, reduces its adjustment time to specified parameters of leveling, reduces the effect of subjective

factor on the quality of settings compared with separate setting rollers, allows you to automate the process of setting up the device. All this provides an increase in the quality of the straightening and increases labor productivity by reducing the device setup time to the required parameters.

However, the device has a very

an important advantage is that it eliminates the influence of the tolerance on the diameter of a flexible element, such as a rope, on the leveling parameters. The ego, with a certain value of the diameter range of the straightened ropes and the distance between adjacent rollers, has a significant impact on the quality of the straightening due to the significant tolerance on the diameter of the rope compared to the required deflection of its axis under the roller. In existing devices, the settings are counted from any fixed initial position of the rollers, therefore a decrease in the diameter of the rope leads to insufficient deformation of its axis relative to that required for the nominal diameter, and an increase in the diameter to excessive deformation. Here, regardless of the fluctuations of the diameter of the rope, its longitudinal axis until the moment of contact with all the rollers of the outer surface remains straight, and the reading of the required amount of deflections on the rollers creating them begins with the moment of contact

in the automatic mode, it can be detected, for example, by pressure sensors mounted on the mechanisms for the lateral movement of the rollers, and in the case of operator control, also visually.

H 15 1 & 22/7

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Claims (1)

DEVICE FOR RICHTING OF LONG-DIMENSIONAL FLEXIBLE ELEMENTS, containing non-drive rollers mounted on the axles, combined into groups and sequentially located in several planes along the longitudinal axis of the flexible element and kinematically connected mechanisms for simultaneous lateral movement of the rollers, characterized in that, in order to improve the quality of straightening each