SU1405929A1 - Safety discharging device for working stand - Google Patents

Abstract

The invention relates to the field of rolling production, in particular to the equipment of working stands of mills, and can be used to limit and relieve rolling forces. The goal is to verify the accuracy of the device. The rolling forces are transferred to the lead, which fills the working cavity 3. When the mill is overloaded, the glass 6 is destroyed. Glass 6 perceives only a part of the force of rolling, and this makes it small, just calculate its size and breaking force. In the event of a roll stopping during rolling, their release is made by turning screw 7. Channel 5 opens and lead flows through it into cavity 4. Punch 1 and body 2 approach each other and rolls are released. 5 il. with S (L

Description

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The invention relates to rolling production, in particular to the equipment of mill work stands, and can be used to limit and remove rolling force.

The purpose of the invention is to improve the accuracy of the device.

FIG. I schematically presents the proposed safety-unloading device, a general view; in fig. 2 - the form of a ruptured glass; in fig. 3 is a section A-A in FIG. 2; in fig. 4 — device after: working; in fig. 5 - the same, at the time of ezagruzki rolls.

The rolling mill safety device includes a punch 1, orus 2, forming a working cavity 3, filled with a pressure transmitting material, such as lead, an auxiliary cavity 4 connected by channels 5 to the working cavity 3, a rupture disk 6, screw 7, screwed into the body 2. To prevent lead from flowing between the punch 1 and the body 2, a metal sealing ring 8 is provided. From the bottom, the auxiliary cavity 4 is closed by a lid 9. The body 2 has radial holes 10.

The device works as follows.

The rolling mill safety device is located between the pressure screw and the upper shaft feeder. The forces acting on one side of the pressure screw on the punch 1 and on the other: the torsons from the cushion of the upper roll on the casing 2 compress the lead filling the working cavity 3. The lead acts on the opening 6 of the cup (Fig. 2) which, with a certain force, is destroyed along the section -A (Fig. 3), weakened by the opening 11 i by the recesses 12, after which the bottom 13 (Fig. 4) together with lead passes into the auxiliary cavity 4, and the annular part 14 remains on place Lead extrusion from (lyaHcoHa 1 and body 2 is facilitated if their working surfaces are made with a tapering i angle of inclination a (Fig. 4), due to the jiero also the accuracy of the operating device increases, as the influence of friction forces on the squeezing force of the pig decreases Angle a can be taken in the range from $ 10 °. Too large angles (more than 10 °) Ke is recommended due to an increase in the dimensions of the device. The height of the safety-unloading device after breaking the cup 6 decreases sharply and the thrust force is removed (Fig. 4). This is the meaning of Pre protective function of this device. To bring the device into operation

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state, you need to remove the cover 9, remove punch 1 from body 2, remove remnants 13 and 14 of the rupture glass and lead from the cavities, slightly unscrew screw 7, install a new explosive glass 6 of thai so that hole 11 is coaxial with screw 7, tighten the last , fill the working cavity with lead and insert the punch 1 into the housing 2. The device is ready for operation.

In addition, the device provides unloading of the rolling stand from the rolling force when the metal is clamped in the rolls and it is impossible to turn the pressure screws, but the force is not enough to break the glass 6. In this case, you need to unscrew the screw 7, then lead 5 flows through the channels 5 into the auxiliary cavity 4 and the cage is partially unloaded. To completely discharge the cage, it is necessary to heat the lead to the melting temperature and it flows out through the channels 5 into the auxiliary cavity 4. The heat source can be, for example, the flame of the gas-oxygen cutting torch directed into the radial holes 10. To bring the device into working condition, it is necessary to remove the cover 9 and punch 1, remove lead from the auxiliary cavity 4, from channels 5 and from the working cavity 3, tighten the screw 7, fill the working cavity 3 with lead, install the lid 9 and insert the punch 1 into the housing 2. The device is ready for operation.

The use of the proposed rolling mill safety relief device reduces the rolling force and the unloading of the rolling stand when the pressure mechanism is wedged, thereby preventing breakage of the rolling stand parts and reducing mill downtime.

Claims (1)

Invention Formula Safety-discharging device rolling mill containing a punch 0 and the housing, forming a working cavity filled with pressure transmitting material, such as lead, an auxiliary cavity in the housing associated with the working cavity blocked by a fracturing element, a cylindrical bore and additional channels formed in the housing and covered with a screw characterized by that, in order to increase the accuracy of the device, the destructive element is designed as a bursting glass 0 in the side wall of which a hole is made coinciding with the entrance to the additional channel. 0 five X u / T: y / 7777 / 77Z /////)  / J fie. 3 1H 5 u / j: T: phases. 2 / I- / I fae, five  fi.2. 3