CN108380672A - A kind of self-reacting device of adjustment roll chock and rack gap - Google Patents

Abstract

The invention belongs to mechanical equipment of steel rolling technical fields, and in particular to a kind of self-reacting device of adjustment roll chock and rack gap.Including being opened in groove body compatible with disc spring hydraulic cylinder body on the outside of framework pillar, run through framework pillar and with the working hole of disc spring hydraulic cylinder piston rod clearance fit, magnetostrictive displacement sensor.Self-reacting device of the present invention eliminates the side clearance between rolling mill roller bearing seat and framework pillar, improves the static determinacy of milling train.The stability and intrinsic frequency for substantially increasing milling train, reduce Mill chattering phenomenon.The invention of self-reacting device, can ensure in the design of four-high mill roll system structure upper working rolls and lower working rolls will not relatively upper lower support roll crossing operation, and then the drawbacks of eliminate the axial movement of working roll clamping plates band.

Description

A Self-Adaptive Device for Adjusting the Gap Between Roller Bearing Housing and Frame

technical field

The invention belongs to the technical field of steel rolling machinery, and in particular relates to an adaptive device for adjusting the gap between a roll bearing seat and a rack.

Background technique

At present, the four-high rolling mills used in my country's hot rolling mills generally have the phenomenon that the work rolls clamp the strip and move axially. After field investigation, it was found that the axial baffle plate and its fixing bolts of the work rolls of a 3000mm medium and heavy plate mill in a steel factory were often broken and damaged, and could not be used for a long time; It moves axially to maintain production. The axial movement of the work roll linkage roll drive device, universal joint shaft, motor shaft, etc. can even be directly measured with a steel ruler. For a long time, we have focused on solving the wear-resistant problem of the rack liner, but the effect is not obvious, and the root of the problem cannot be found in the end.

According to the traditional design theory, the four-high strip mill has two important design parameters, as shown in Figure 1, which are the side clearance δ between the roll bearing housing 11 and the window of the stand column 3 and the eccentricity ε of the roll layout design. According to the micro-scale statically indeterminate design theory, these two parameters have a significant impact on the stability of the rolling mill roll system. The small gap δ between the roll bearing housing 11 and the window of the stand column 3 (the wear of the lining plate increases later) makes the roll system in a static state, and then the working roll and the backup roll produce a cross working condition. Under certain conditions Under the phenomenon that the work roll clamps the strip and moves axially.

The invention of the self-adaptive device can ensure that the rolls of the rolling mill are parallel, positioned firmly, and run stably, eliminating the energy consumption caused by the axial movement of the strip clamped by the work rolls, so that the capacity of the rolling mill can be effectively exerted. When working under a large reduction , to produce high-strength, high-quality strip products, and to upgrade traditional rolling mills to reduce costs and increase benefits.

Contents of the invention

The purpose of the present invention is to provide a device for controlling the gap between the roll bearing seat and the frame by using the principle of self-adaptation, which can overcome the problems of static instability in the existing rolling mill and the axial movement of the work roll clamping the strip.

The present invention is achieved through the following technical proposals: an adaptive device for adjusting the gap between the roll bearing seat and the frame, which includes a groove formed on the outer side of the frame column and matched with the cylinder body of the disc spring hydraulic cylinder, and runs through the frame column And the working hole that fits with the piston rod of the disc spring hydraulic cylinder, and the magnetostrictive displacement sensor;

The piston rod of the disc spring hydraulic cylinder can pass through the working hole and its extended end is connected with a limit plate that is limited and matched with the roll bearing seat through a pressure sensor. Tightly fit the limit cover, the detection end of the magnetostrictive displacement sensor is installed inside the piston rod of the disc spring hydraulic cylinder, the electronic signal transmission end of the magnetostrictive displacement sensor feeds back the displacement signal to the host computer, the disc spring hydraulic pressure The rodless chamber of the cylinder is connected to the A port of the electromagnetic reversing valve, and the P port of the electromagnetic reversing valve is connected to the oil tank through the hydraulic pump. The pipeline between the rodless chamber of the disc spring hydraulic cylinder and the A port of the electromagnetic reversing valve A proportional relief valve is connected in parallel.

As a further improvement of the technical solution of the present invention, the limiting plate includes an anti-wear backing plate and an intermediate backing plate, one end of the anti-wear backing plate is in contact with the roll bearing housing, and the other end is connected to the pressure sensor through the middle backing plate.

Advantage of the present invention and positive effect are:

(1) The self-adaptive device eliminates the side gap between the roll bearing housing of the rolling mill and the column of the frame, and improves the static stability of the rolling mill.

(2) The stability and natural frequency of the rolling mill are greatly improved, and the chattering phenomenon of the rolling mill is reduced.

(3) The invention of the self-adaptive device can ensure that the upper and lower work rolls will not run crosswise relative to the upper and lower support rolls in the structural design of the four-high mill roll system, thereby eliminating the disadvantages of the work rolls clamping the strip and moving axially.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Figure 1 is a schematic diagram of the gap between the rolls of a four-high rolling mill.

Fig. 2 is a schematic structural diagram of the adaptive device of the present invention.

Figure 3 is a side view of the adaptive device.

Fig. 4 is a schematic diagram of the installation position of the adaptive device.

Figure 5 is a schematic diagram of the hydraulic system of the adaptive device.

In the figure: 1-anti-wear backing plate; 2-middle backing plate; 3-frame column; 4-pressure sensor; 5-disc spring hydraulic cylinder; 6-magnetostrictive displacement sensor; 7-proportional overflow valve; 8 - electromagnetic reversing valve; 9 - hydraulic pump; 10 - adaptive device; 11 - roll bearing seat; 12 - oil tank, 13 - limit cover.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

An adaptive device for adjusting the gap between a roll bearing seat and a frame, comprising a groove formed on the outside of the frame column 3 and matched with the cylinder body of the disc spring hydraulic cylinder 5, passing through the frame column 3 and connected to the disc spring hydraulic cylinder 5 The working hole of the piston rod clearance fit, and the magnetostrictive displacement sensor 6,

The piston rod of the disc spring hydraulic cylinder 5 can pass through the working hole and its protruding end is connected with a limit plate that is limitedly matched with the roll bearing seat 11 through the pressure sensor 4, and the cylinder body of the disc spring hydraulic cylinder 5 is equipped with a The limit cover 13 tightly matched with the frame column 3, the detection end of the magnetostrictive displacement sensor 6 is installed inside the piston rod of the disc spring hydraulic cylinder 5, and the electronic signal transmission end of the magnetostrictive displacement sensor 6 feeds back the displacement signal To the host computer, the rodless chamber of the disc spring hydraulic cylinder 5 is connected to the A port of the electromagnetic reversing valve 8, and the P port of the electromagnetic reversing valve 8 is connected to the oil tank 12 through the hydraulic pump 9, and the rodless chamber of the disc spring hydraulic cylinder 5 A proportional overflow valve 7 is connected in parallel on the pipeline between the rod cavity and the port A of the electromagnetic reversing valve 8 .

The present invention can be shown in Figure 4, respectively install a self-adaptive device 10 of the present invention on the opposite side of two roll chocks 11, or also can respectively install a self-adaptive device 10 of the present invention on the same side of two roll chocks 11 device 10. In specific use, the electromagnet YVH2 of the electromagnetic reversing valve 8 and the proportional electromagnet YB1 of the proportional overflow valve are energized, the electromagnetic reversing valve 8 is reversing, and the hydraulic pump 9 flows high-pressure oil through the P-A channel of the electromagnetic reversing valve 8. The rodless cavity of the disc spring hydraulic cylinder 5 pushes the piston rod of the disc spring hydraulic cylinder 5 out, and the magnetostrictive displacement sensor 6 detects the position of the piston rod in real time. , the displacement sensor 6 transmits the displacement signal to the upper computer, and the upper computer controls the electromagnet YVH2 of the electromagnetic reversing valve 8 to be de-energized, and the electromagnetic reversing valve 8 is in the neutral position. At this time, the disc spring hydraulic cylinder 5 is in the pressure maintaining state, and Guarantee that the gap between the roll chock 11 and the side of the stand column 3 is zero. During the rolling process, the thermal expansion of the roll chock 11 leads to an increase in the contact pressure between the backing plate and the roll chock 11, and the pressure in the rodless chamber of the disc spring hydraulic cylinder 5 is controlled by the pressure sensor 4 and the proportional relief valve 7 forming a pressure closed loop. Adjust in time to make it equal to the horizontal component force of the roll forever and keep the gap between the roll chock 11 and the side of the stand column 3 to be zero. When replacing the roll, the electromagnet YVH1 of the electromagnetic reversing valve 8 is energized, and the high-pressure oil in the rodless cavity of the disc spring hydraulic cylinder 5 is unloaded and flows back to the oil tank 12 through the A-T of the electromagnetic reversing valve 8. Under the action of the disc spring, the piston The rod returns to its original position.

Preferably, the limiting plate includes an anti-wear backing plate 1 and an intermediate backing plate 2 , one end of the anti-wear backing plate 1 is in contact with the roll bearing housing 11 , and the other end thereof is connected to the pressure sensor 4 through the middle backing plate 2 .

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (2)

1. An adaptive device for adjusting the gap between the roll bearing seat and the frame, which is characterized in that it includes a groove formed on the outer side of the frame column (3) and matched with the cylinder body of the disc spring hydraulic cylinder (5), and runs through the machine. The working hole that supports the column (3) and the piston rod of the disc spring hydraulic cylinder (5) clearance fits, and the magnetostrictive displacement sensor (6), The piston rod of the disc spring hydraulic cylinder (5) can pass through the working hole and its extended end is connected with a limit plate that is limitedly matched with the roll bearing seat (11) through the pressure sensor (4), and the disc spring hydraulic cylinder ( 5) A limit cover (13) that is tightly fitted with the frame column (3) is installed outside the cylinder, and the detection end of the magnetostrictive displacement sensor (6) is installed inside the piston rod of the disc spring hydraulic cylinder (5) , the electronic signal transmission end of the magnetostrictive displacement sensor (6) feeds back the displacement signal to the host computer, the rodless chamber of the disc spring hydraulic cylinder (5) is connected to the A port of the electromagnetic reversing valve (8), and the electromagnetic reversing valve The P port of the directional valve (8) is connected to the oil tank (12) through the hydraulic pump (9), and the pipe between the rodless chamber of the disc spring hydraulic cylinder (5) and the A port of the electromagnetic directional valve (8) is connected in parallel There is a proportional relief valve (7). 2. An adaptive device for adjusting the gap between the roll chock and the frame according to claim 1, characterized in that the limit plate includes an anti-wear backing plate (1) and an intermediate backing plate (2). One end of the anti-wear backing plate (1) is in contact with the roll bearing housing (11), and the other end is connected with the pressure sensor (4) through the middle backing plate (2).