SU1227269A1 - Working stand - Google Patents

Description

This invention relates to the design of work stands for rolling (in locale) copTOBbix and shaped profiles.

The aim of the invention is to reduce the setting time of the rolls, simplifying the construction by combining the functions of radial and axial adjustment.

FIG. 1 shows a front view roll bar; On shig.2, section A-A in FIG. 1 in FIG. 3 section bb in fig. one.

The rolling stand contains a bed 1, in which at ° C x 2 and 3, made in the form of screws and inclined to the line of rolling at equal angles and opposite in sign, angles 4 and 5 with roll rolls assemblies ( rollers) 6 and 7; On the non-drive side of the stand, on a stand is not 1; a drive 8 is installed for rotating the inclined axes 3 and 2; The swivel supports 4 and 5 are in contact with the bars 9 and 10, which have transverse and longitudinal wedge shape. In this case, the longitudinal wedge shape is parallel to the wasps m 2 and 3 of the pivot bearings 4 and the Hz and the transverse is equal to the average value of the inclination angle of the resultant force in the deformation zone. The contact width of the pivot bearings 4 and 5 with bars 9 and 10 is greater than the range of variation of the angle of the resultant force in the deformation zone,

The coupling of the swivel bearings 4 and 5 with the screw part of the axles 2 and 3 is carried out by means of nuts 11 and 12 fastened to the swivel bearings 4 and 5. The nuts 11 and 12 are fitted with hubs located outside the contour of the swivel supports 4 and 5, with connecting elements, for example, cams interacting with similar elements of the half couplings 13. The half couplings 13 are connected to the screw part of the axles 2 and 3 of the rotary supports

4 and 5 can be moved along axes 2 and 3 by means of nuts 14 which are fastened with a centering cover 15 with coupling half 13 with a gap to allow free movement of nuts 14 relative to half coupling

13. Guaranteed connection in combination with prevention of self-switching off of half couplings 13 with nuts 14

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0 5

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The clasps 16 of the supports 4 and 5 are elongated in the form of plates that are in constant contact with the edges of the nuts 14. The clips 16 are attached to the ooBopoTHbfM supports 4 and 5 with screws 17.

The rotational drive 8 of the inclined axes 2 and 3 is a bevel gearbox, comprising gear wheels IB, 19 and 20 with bevel teeth, and an actuation and locking device. Gears 18 and 20 of the sleeves on axles 2 and 3 on bearings 21J and wheel 19 on the bearing 22. Driven bevel gears 18 and 20 are equipped with hubs, at the ends of which are made connecting elements, for example, jaws j interacting with similar connectors elements 2J and 24, fastened to axes 2 and 3, for example, by means of a spline joint. By means of the nut 25, rotation of the inclined axes 2 and 3 is engaged.

The steering wheel 19 is rigidly connected to the driving conical wheel 19 with a disk drive 27 and a latch 28. The protrusions of the latch 28 are mated with holes in the housing 29 of the bevel-drive gearbox 8 of the inclined axes 2 and 3, ensuring the locking of the latter.

The bars x 9, 10 and rotary supports 4 and 5 are fixed reading scales 30 and 31 of the relative position of the rolls (rollers) 6 and 7. Similar scales 32 and 33 are mounted on the housing 29 of the drive 8 inclined axes 2, 3 and the wheel 27 of the steering wheel 26.

The pitch of the helical part of the inclined axes 2 and 3 is chosen from the condition of equality of displacement of both supports 4 and 5 for equal angular rotation of the axes 2 and 3, or p g, ozo cosological, where p, p are the steps of the screw part of the axes 2 and are angles inclination of these axes to the rolling line. In the case of the presence of a rotational drive of inclined axes 3 and 2, equal in magnitude of displacements, we obtain from the expression p cos,., - i, where i is the gear ratio of the drive 8 from the bottom axis 3 to the top 2.

For ease of operation of the rolling (roller) stand, it is advisable to cut threads with equal pitch and the same direction of the turns of the thread on both inclined axes, and to set the angles of inclination of axes 2 and 3 to the rolling line to be equal in magnitude and opposite in sign.

Lever rolling stand works as follows.

Swivel bearings 4 and 5 with rollers 6 and 7 are pressed to the bars 9 and 10 by known methods. Using the actuator 8, one of the pivot bearings 4 and 5 is moved to align the ends of the rolls (rollers) 6 and 7 with a given accuracy. The movement of the supports 4 and 5 takes place when the handwheel 26 and the bevel gears 18-20 rotate with the half couplings 23 and 24. By aligning the ends of the rolls, when the steering wheel 26 is rotated, axial and radial adjustment simultaneously takes place at a constant position of the rolling line during the entire service life of the rolls. All these actions are performed with latch 28 turned off.

After presetting the stand, the spindles of the stand drive are connected to the rolls 6, 7 and a tuning strip is obtained. If necessary, adjust the size of the caliber. At the end of the adjustment of the gauge, the protrusions of the retainer 28 are inserted into the hole in the housing 29 of the bevel gearbox of the drive 8. The amount of movement is determined on the scales 30 and 31 on the base 1 and the swivel supports 4, 5 and the scales 32, 33 on the gear case 29 and the disk 27 steering wheel 26.

When reloading the rollers, the protrusions of the retainer 28 are separated from the holes in the gearbox housing 29. When the handwheel 26 and bevel gears 18-20 rotate, the axes 2 and 3 rotate, and the swivel supports 4 and 5 with the rollers 6 and 7 move to the position when the gap between the barrels of the rolls 6 and 7 provide simultaneous rotation of the supports 4 and 5 in the direction opposite to the direction of rolling. The rotation of the nuts 14 connect the coupling halves 13 and 11. The rotation of the supports 4 and 5 of the latter is from the deformed zone.

j 10 5 20

25 Q

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The mats are fixed outside of it in a position convenient for transferring the rolls 6 and 7 by the protrusions of the latch 28. By replacing the rolls, the swivel bearings 4 and 5 return to the working position and all operations are repeated in reverse order. The subsequent adjustment of the gauge consists in setting the required size in height, since the axial adjustment and the position of the gauge relative to the rolling line are unchanged.

Increased productivity is achieved by reducing the effort required to set up the caliber. Reducing the adjustment time of the gauge is achieved by, firstly, the axial adjustment of the gauge and the position of the rolling line are set once at the time of the assembly of the stand and remain unchanged during the subsequent operation of the stand secondly, the radial adjustment is performed by simultaneously moving both rolls Thirdly, the use of a bar with a longitudinal and transverse wedge shape as a stop ensures the constancy of the position of the plane passing through the axes of the rolls, regardless of the relative position in the radial and axial direction x. combined with greater rigidity.

The simplification of the design consists in combining the functions of the radial and axial adjustment devices, as well as the mechanism for rotating the supports with rollers (rollers).

The time spent on transshipment is reduced as the pivot bearings rotate synchronously.

The proposed stand design reduces the tuning time by 15–25% and ultimately increases productivity by 0.8–2.4%, enhances the accuracy of geometrical dimensions up to 10 quality with simultaneous expansion of the product profile.

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29

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2 (3)

Compiled by V.Vasilyeva Editor N.Slobod nickname Tehred L.Oleinik Proofreader A.Zimokosov

Order 2242/8 Circulation 518 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Fig.Z

Claims (2)

1. Rolling stand, containing a bed, rolls with a lever-wedge system of their axial adjustment, the levers of which are installed in the rotary bearings with axes located in the bores of the bed, characterized in that, in order to reduce the setup time of the rolls, simplify the design of the stand by combining of radial and axial regulation functions, the axes of the rotary bearings are installed with an inclination to the rolling line at equal angles and opposite in sign and are equipped with a drive for their rotation, and the rotary bearings are mounted on the axes with the possibility of of their longitudinal displacement and coupled by a pair of screw nuts, the ratio of the pitch of the thread of this pair being inversely proportional to the cosine of the angle of inclination of the axes to the rolling line and directly proportional to the gear ratio of the axis rotation drive. 2. A cage according to claim ©, characterized in that the rotary support rotary drive is equipped with connecting couplings, the first coupling half of which is connected to the support and provided with a plate retainer, and the second coupling half is equipped with a nut mounted on the axis of the rotary bearings with the possibility of its longitudinal movement with a gap relative to the coupling half itself, the nut faces of the second coupling half being connected to the plate retainer of the first coupling half. > 12 2 7-2 6 9