CN203917404U - Strip tension control device between a kind of frame of cold continuous rolling mill - Google Patents

Abstract

The utility model discloses strip tension control device between a kind of frame of cold continuous rolling mill.The utility model comprises forward pull checkout gear, tension-adjusting gear and backward pull checkout gear.Forward pull checkout gear comprises forward pull roller and two tension pick-ups, and two tension pick-ups lay respectively at forward pull roller two end axles bearing below, for detection of the tension force of forward pull roller place band steel; Tension-adjusting gear comprises dancer rools and four hydraulic means, and four hydraulic means lay respectively at the upper and lower of dancer rools two end axles bearing, and under the adjusting of four hydraulic means, dancer rools can move up and down, and with this, regulates strip tension; Backward pull checkout gear comprises backward pull roller and two tension pick-ups, and two tension pick-ups lay respectively at backward pull roller two end axles bearing below, for detection of the tension force of backward pull roller place band steel.The utility model can be realized the Detection & Controling to strip tension, simple in structure, fast response time.

Description

Strip tension control device between a kind of frame of cold continuous rolling mill

Technical field

The utility model relates to strip tension control device between a kind of rolling-mill housing, and this device belongs to strip tension control field, is with steel constant-tension control device between especially a kind of frame of cold continuous rolling mill.

Background technology

Rolling with (stock) tension can prevent rolled piece sideslip, makes rolled piece straight; Reduce the resistance of deformation of rolled piece, can prick out thinner product; Reduce roll-force, reconcile motor load, reduce energy consumption, therefore in belt steel rolling process, adopt tension-rolling more.

The fluctuation of strip tension in the operation of rolling, can cause sheet metal thickness to differ, and has a strong impact on product quality, and the dangerous situations such as broken belt, heap steel even can occur.Therefore the constant control of strip tension in the operation of rolling is very important.

At present tension force between frame of cold continuous rolling mill is controlled and mainly contained two kinds: a kind of is that loop tension is controlled, the main loop mechanism that relies on, by kink eyelid retractor is installed between frame, the mutual balance of moment that driving moment by kink eyelid retractor and strip tension etc. cause, realizes the control to strip tension; Another kind is non-tension control, indirectly calculate tension value, and it is constant to manage to control this tension value by roll-force distance and roll-force.Above-mentioned two kinds of methods have weak point separately, and loop tension control structure is complicated, response speed is slow, the algorithm of non-tension control based between roll torque, roll-force and tension force, and arithmetic accuracy has much room for improvement.

Summary of the invention

The utility model, for the deficiencies in the prior art part, provides strip tension control device between a kind of frame of cold continuous rolling mill.

The utility model is by forward pull checkout gear, tension-adjusting gear and backward pull checkout gear.

Described forward pull checkout gear comprises forward pull roller and two tension pick-ups, and two tension pick-ups lay respectively at forward pull roller two end axles bearing below, for detection of the tension force of forward pull roller place band steel.

Described tension-adjusting gear is comprised of dancer rools and four hydraulic means, four hydraulic means lay respectively at the upper and lower of dancer rools two end axles bearing, by regulating the oil pressure of four hydraulic means, dancer rools can move up and down with hydraulic stem, with this, regulates strip tension.

Described backward pull checkout gear comprises backward pull roller and another two tension pick-ups, and two tension pick-ups lay respectively at backward pull roller two end axles bearing below, for detection of the tension force of backward pull roller place band steel.

The utility model can be realized the real-time Detection & Controling to strip tension, simple in structure, and fast response time has overcome that kink control structure is complicated, the shortcoming of low-response, has more practicality and economy.

Accompanying drawing explanation

Fig. 1 is strip tension control device structural representation between frame of cold continuous rolling mill;

Fig. 2 is front and back tension detecting apparatus structure cutaway views;

Fig. 3 is tension-adjusting gear structure cutaway view;

Fig. 4 is that tension force calculates schematic diagram;

Fig. 5 is tension force control flow chart;

In accompanying drawing: 1. tension force measuring roll; 2. dance roller; 3. rolling-mill housing; 4. be with steel board; 5. tension force detecting sensor; 6. bearing block; 7. bearing; 8. hydraulic means.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in attached Fig. 1 and 2, the utility model is comprised of forward pull checkout gear, tension-adjusting gear, backward pull checkout gear.Described forward pull checkout gear comprises a forward pull measuring roll 1 and two tension force detecting sensors 5, two tension force detecting sensors 5 lay respectively at forward pull measuring roll 1 two end axles bearing 6 belows, tension force for detection of forward pull measuring roll 1 place's band steel board 4, bearing block is embedded in rolling-mill housing 3, and tension force measuring roll is by bearing 7 supportings at two ends.Described backward pull checkout gear comprises a backward pull measuring roll and two other tension force detecting sensor, the same tension detecting apparatus of its structure.

As shown in Figure 3, described tension-adjusting gear is comprised of a dance roller 2 and four hydraulic means 8, four hydraulic means 8 lay respectively at the upper and lower of dance roller 2 two end axles bearings 6, by regulating the oil pressure of four hydraulic means 8, dance roller 2 can move up and down with hydraulic stem, with this, carrys out accommodation zone steel board 4 tension force.

The tension signal of four tension pick-ups is passed to Programmable Logic Controller through amplifier and digital to analog converter, process by analysis the deviation that obtains actual tension and setting value, conversion calculates the adjustable height of dance roller, again described hydraulic means is sent to instruction, by hydraulic means, controlled the lifting of dance roller, control constant with steel board tension force.

As shown in Figure 4, rear and front end is tension force measuring roll, and centre is dance roller.In figure, each physical quantity implication is as follows: R is rear and front end tension force measuring roll and intermediate tension dancer rools radius; When H is initial position, intermediate tension dancer rools axis place horizontal plane and tension force measuring roll axis place, both sides elevation of water are poor; Δ H is that intermediate tension dancer rools carries out tension adjustment horizontal plane position, axis place and initial position difference in height afterwards; When θ is initial position with steel board the cornerite on the tension force measuring roll of both sides, front and back; β carries out after tension adjustment the cornerite on the tension force measuring roll of both sides, front and back with steel board; L1 is intermediate tension dancer rools axis and both sides, front and back tension force measuring roll axis distance in the horizontal direction; L2 is intermediate tension dancer rools point of contact and with the band steel board length between steel board and tension force measuring roll point of contact, rear and front end during with steel board and initial position; L3 is intermediate tension dancer rools point of contact and with the band steel board length between steel board and tension force measuring roll point of contact, rear and front end with steel board and after carrying out tension adjustment; L4 is with steel board band steel board 4 length corresponding to θ angle when the initial position.

According to the geometrical relationship between each physical quantity, can obtain:

$L2=\sqrt{H^2+{L1}^2-4R^2}---\left(1\right)$ $L3=\sqrt{{(H+\mathrm{\ΔH})}^2+{L1}^2-4R^2}---\left(2\right)$

L4＝R*θ (3)

The corresponding arc length variable quantity of cornerite before and after tension adjustment:

ΔL4＝(β-θ)*R (4)

Before and after tension adjustment, sheet material length variations is:

ΔL＝4(β-θ)R+2(L3-L2) (5)

Tension force and sheet material length variations magnitude relation are:

$\mathrm{\ΔT}=\frac{\mathrm{\ΔLAE}}{L}=\frac{\mathrm{\ΔLAE}}{4L4+2L2}---\left(6\right)$

Formula (1)-(6) have provided the relation between tension variation amount and sheet material length variations amount, and in formula, A is band steel board cross-sectional area, and E is band steel board elastic modelling quantity, and θ and β are determined by formula (7) and (8) respectively:

$\tan \mathrm{\θ}=\frac{H-2R+\frac{2R}{\mathrm{COS\θ}}}{L1}---\left(7\right)$

$\tan \mathrm{\β}=\frac{H+\mathrm{\ΔH}-2R+\frac{2R}{\mathrm{COS\β}}}{L1}---\left(8\right)$

As shown in Figure 5, in the operation of rolling, the tension signal of tension force detecting sensor is passed to Programmable Logic Controller, process by analysis the deviation that obtains actual tension and setting value, conversion calculates the adjustable height of dance roller, again described hydraulic means is sent to instruction, by hydraulic means, controlled the lifting of dance roller, thereby realize the control with steel board tension force.

Claims (1)

1. a strip tension control device between frame of cold continuous rolling mill, is comprised of forward pull checkout gear, tension-adjusting gear, backward pull checkout gear, it is characterized in that:

Described forward pull checkout gear comprises forward pull roller and two tension pick-ups, and two tension pick-ups lay respectively at forward pull roller two end axles bearing below, for detection of the tension force of forward pull roller place band steel;

Described tension-adjusting gear is comprised of dancer rools and four hydraulic means, four hydraulic means lay respectively at the upper and lower of dancer rools two end axles bearing, by regulating the oil pressure of four hydraulic means, dancer rools can move up and down with hydraulic stem, with this, regulates strip tension;

Described backward pull checkout gear comprises backward pull roller and another two tension pick-ups, and another two tension pick-ups lay respectively at backward pull roller two end axles bearing below, for detection of the tension force of backward pull roller place band steel.