SU1222340A1 - Distributing and feeding mechanism for cold tube rolling mill - Google Patents

Description

The invention relates to pipe production and can be used in the design of cold rolling mills.

The purpose of the invention is to simplify the design and increase the wear resistance of the mechanism.

FIG. 1 shows the distribution-feeding mechanism, general view; in fig. 2 view A in FIG. one.

The distribution-feeding mechanism of the cold-rolling mill includes a drive shaft 1 with a cam 2, a drive shaft 3 of the workpiece feed with a lever 4 fixed on it, a carrier roller 5 mounted in frame 6 with an eccentric 7 and a sleeve 8 enclosing it attached to it is a leading crankshaft 9, made up of two parts located along the bushing diameter with a longitudinal groove on the free part, a drive screw 10 with a finger 11 placed in this groove, a Kodachi driven shaft 12, a driven crank 13 mounted on it, and three gu 14 shuntly connect You both cranks.

The device works as follows.

Drive shaft 1 is said to have a full rotation. The cam 2, rotating with the drive shaft, communicates the lever 4 through contact with the roller 5 a swinging motion. In this case, the driving shaft 3 of feeding the workpiece with the eccentric 7 performs a reciprocating rotational motion, and the driving crank 9 performs a swinging movement, simultaneously sliding through the longitudinal direction relative to the finger 11. A swinging movement of the driven crank 13 and returning the rotational movement of the driven shaft 12 feed with an amplitude of about, which by

Freewheel overrunning clutch and gear transmission is converted to a perfect

rotation of the feed screw, ensuring that the desired feed of the workpiece.

To change the amount of workpiece feed, the drive screw 10 with the finger 11 is moved in the axial direction, thereby changing the arm 6 of the driving crank 9 and, consequently, the amplitude of its swing. The swing amplitude of the driven crank 13, which determines the feed rate, varies accordingly. Thus, by rewinding the screw 10, the required feed amount of the workpiece is set.

In contrast to the known similar mechanisms, where the leading crankshaft is connected concentrically and rigidly with its shaft, in the proposed mechanism this connection is made eccentric and mobile.

s 0 5

about

0

five

five

0

K) 2

This allows us not only to use the crank crank for transmitting the rotary movement from the creep shaft to the crank itself and then to the driven crank and its shaft, but also as a function of the angle of rotation control for both crankshaft (if lengthening the drive crank with a groove on it and with a driving finger in the groove), to ensure a smooth change in dynamic loads (during operation) in both cranks and in all subsequent links of the kinematic chain of the work feed mechanism, reducing its th shock loads increase ekspluatatsio1-Shuto reliability, durability and longevity.

The mechanism allows to ensure at any time during the rolling process (with non-stop mill operation) smoothness and accuracy of bale adjustment with the possibility of changing the feed to the most important wheels and thereby adjusting the JtnpoBaTb value of the linear displacement of the workpiece in accordance with the specified rolling mode each pipe, for example, during the passage of the joints of the billet shsh when rolling the front end of each billet.

: Adjusting the movement of a finger to a predetermined order in a vertical line inside the groove on a part of the driving crank allows changing the value of the angle of rotation of this crank and, therefore, the magnitude of the thrust of the crankshaft and its head during rolling. non stop | work camps.

Adjusting the distance B between the leading crank and pin axes can be carried out in accordance with the process conditions several times during the rolling of each pipe, when the front section of the billet passes through the rolls.

The proposed mechanism is reliable in connection with the structurally and kinematically provided possibility of free universal rotation of the rod when it performs working and adjusting functions (without interfering with one another), due to the lack of guides for the tractor and in connection with the free a combination (due to the eccentric-movable connection of the leading crankcase with the drive shaft) of the working movement of the leading crane and its adjustment movement.

The proposed design is simple and reliable, since one driving crank, rigidly bonded to the bushing and connected to the drive shaft with an eccentric drive shaft, eccentric with it, from the one-arm crank, became two shoulders and became an inseparable common link of the following three mechanisms at the same time: and

t ha) single-crank (eccentric and leading crank) and rocker (the elongated part of the leading crank with a groove is the rocker, and the finger is its slider).

Editor M. Blanar Order 1641/7

Compiled by O. Prokopen Tehred O. SopkoCorrector

Circulation 518 Subscription

VNIIPI USSR State Committee

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

Branch PPP Patent, Uzhgorod, st. Project, 4

2

Compiled by O. Prokopen Tehred O. SopkoCorrector M. Dsmchik

Claims (1)

DISTRIBUTIVE — FEEDING MECHANISM OF THE COLD ROLLING MILL A TUBE comprising a drive shaft with a cam, a workpiece feed drive shaft with a lever rigidly mounted on it, carrying a roller mounted in a frame, a feed drive shaft mounted on a driven and drive feed shaft, respectively, a driven crank and a drive crank with a longitudinal groove and a link connecting them characterized in that, in order to simplify the design and increase the wear resistance of the mechanism, it is equipped with an eccentric mounted on the feed drive shaft, enclosing it with a sleeve to which the drive crank is attached, composed two minutes located hub diameter portions, wherein the groove is formed at the free portion thereof, and the drive screw with a finger placed in this groove. SU p. 1222340 FIG. 1