SU1447448A1 - Drive for working stand of tube cold-rolling mill - Google Patents

Abstract

The invention relates to pipe production and can be used, in particular, in cold rolling mills for tubes with a moving stand. The purpose of the invention is to increase the speed by reducing the level and leveling of dynamic forces and moments. The drive of the stand of the cold rolling mill tube contains a drive shaft 1 with rigidly mounted drive gears 2. The crank gears 3, which are rigidly mounted on the shafts 4 of the crankshaft, are in engagement with them. Two main connecting rods 6 of the stand 7 are hinged to the stand and basic and coaxial fingers 8 crank gears. Two connecting rods 9 are pivotally connected by one ends with additional crank pins 10 and P, and the other with balancing weights 12 and 13, set in the direction Yush11x 14 and 15. Additional pins are installed symmetrically with the same angular displacement relative to the main coaxial crank fingers equal to 100-1 s. The rotation of the drive shaft through additional palyds displaced in a circle and additional connecting rods is converted into a reciprocating movement of equal- ity, weighing loads in their directions for the NNWH. 2 Il. (L

Description

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The invention relates to pipe production and can be used, in particular, in cold rolling mills for tubes with a moving stand.

The purpose of the invention is to increase the speed by reducing the level and typing dynamic forces and moments. .

Figure 1 presents the scheme of the proposed drive; figure 2 - view And figure 1.

The drive of the stand of the cold rolling mill tube includes a drive shaft 1 with rigidly mounted driving gears 2 in engagement with crank gears 3 rigidly mounted on shafts 4 of cranks 5, two main connecting rods 6 of the stand, hinged to the cage 7 and with main coaxial fingers 8 crank gears, and two additional connecting rods 9, pivotally connected by one ends with additional crank pins 10 and-II, and others - with counterbalancing weights 12 and 13, installed in rails 14; and 15 ..

The additional crank pins are installed with the same angular displacement relative to the main coaxial crank pins equal to 100-110 | 1 When the additional pins are less than 100, the overturning moment and amplitude of its oscillations increase significantly, and at offsets that exceed the software, the dynamic torque on the crank shaft.

The balancing weights are identical and have a total weight equal to the weight of the stand, and their guides are installed on opposite sides of the coaxial crank shafts.

The device works as follows.

The rotation of the drive shaft 1 through gears 2 is transmitted to the crank gears 3 and the cranks 5 which are rigidly connected with them. Then this rotation is transformed through the main fingers 8 and the connecting rods 6 in the return-forward motion of the stand, and through the displaced additional crank fingers 10 and 11 and additional connecting rods 9 in the reciprocating movement of the balancing goods in their guides.

Thus, the use of the proposed drive will reduce by 2.6-2.7 times the level of the total dynamic moment on the crank shaft from the inertia forces of all the drive links and kpeti, increase the balancing efficiency, thereby reducing the power consumption of the mill and eliminating the work of the electric motor in the generator. mode. In addition, the drive makes it possible to reduce by 1.5-2 times both the level of the total dynamic force acting from the drive side to the base, its horizontal and vertical components, and the amplitude of their vibrations, thereby reducing the vibroactivity of the mill, as well as eliminate the alternating sign of the total dynamic moment of the tilting base, reduce the amplitude of its collar quantity by 1.5 times and thereby reduce the mill's vibroactivity, which in turn improves the speed and st mill.

About the invention

The drive of the stand of the cold rolling mill tube containing two main connecting rods pivotally connected to the cage and the main coaxial fingers of the crank, and two additional rods pivotally connected by one ends with balance weights, and the other ends by additional shaft cranks placed on the shaft With a single angular displacement relative to the main fingers, characterized in that, in order to increase the speed by reducing the level and leveling of the dynamic forces and moments, the angular displacement of the additional Tel'nykh fingers configured 100-110 °, and the balancing weights are set on opposite sides of the crank shaft.

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 “V4.

Irv

Tszig.2.

Editor Y. Sereda

Compiled by V. Shaimardanov

Tehred L. Serdyukova Proofreader S. Shekmar

Order 6782/8

Circulation 467

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

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Claims (1)

Claim The drive of the stand of the cold rolling mill of pipes containing two main connecting rods pivotally connected to the cage and to the main coaxial crank fingers, and two additional connecting rods pivotally connected at one end with balancing weights, and at the other ends with additional crank fingers located on the shaft with the same angular displacement relative to the main fingers, characterized in that, in order to increase speed by reducing the level and alignment of dynamic forces and moments, the angular displacement of the additional The fingers are 100-110 °, and the balancing weights are installed on opposite sides of the crank shaft.