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Band steel stretch-bending straightening system capable of controlling elongation rate and control method thereof

A technology of stretch-bending straightening and elongation, applied in the direction of elongation control, etc., can solve the problems of low production efficiency of the unit, difficulty in mechanical manufacturing and maintenance, etc.

Inactive Publication Date: 2009-11-25
上海精祥企业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has several shortcomings that cannot be overcome: because a motor drives a gearbox with one input and two outputs, and drives two very long shafts to drag the entrance S roller and the exit S roller respectively, by replacing the gearbox The way that the output gear controls the speed of the entrance and exit S rollers and then controls the elongation of the strip in an open loop inevitably brings difficulties in mechanical manufacturing and maintenance, especially the gear box with the reduction ratio; and different extensions are used in the production process. When the rate is high, the gear of the reduction box needs to be replaced, resulting in low production efficiency of the unit

Method used

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  • Band steel stretch-bending straightening system capable of controlling elongation rate and control method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] like figure 1 As shown, a strip bending straightening system with controllable elongation includes unwinding 1, entrance roll 3, stretch leveling machine 9, exit roll 4, winding 2, and respectively according to the running direction of the strip. The first motor and the second motor that drive the entrance roller 3 and the exit roller 4 are characterized in that they also include:

[0033] Strip inlet and outlet speed measuring device 12 for measuring the strip inlet and outlet speed;

[0034] A first governor 10, connected to the first motor, for controlling the speed of the first motor;

[0035] The second governor 11 is connected with the second motor and is used to control the speed of the second motor;

[0036] The elongation rate calculation control device 13 is connected with the strip steel inlet and outlet speed measuring device 12, the first speed governor 10, and the second speed governor 11, and stores the preset elongation rate δ of the strip steel in it....

Embodiment 2

[0044] A strip bending straightening system with controllable elongation, except for the following differences, other parts are the same as the first embodiment:

[0045] The elongation calculation and control device 13 also stores the maximum elongation deviation value δ 0 , when the absolute value of Δδ is greater than δ 0 , adjust the speeds of the first motor and the second motor respectively through the first governor 10 and the second governor 11 according to Δδ until |Δδ|0 or |Δδ|=δ 0 . That is, when the preset elongation δ 2 and actual elongation δ 1 When the deviation Δδ of Δδ is within the required dead zone range, the speeds of the entrance roller 3 and the exit roller 4 are not adjusted. When the actual elongation δ 1 and preset elongation δ 2 When the deviation Δδ is outside the required dead zone range, the size of the adjustment amount of the speed difference between the entrance roller 3 and the exit roller 4 is determined according to the deviation Δδ, a...

Embodiment 3

[0048] An automatic control method for strip elongation, using the system described in Embodiment 1, comprising the steps:

[0049] Step 1, set the strip preset elongation δ 2 ;

[0050] Step 2, measuring the entrance speed and exit speed of the stretch bending straightener;

[0051] Step 3, calculate the actual elongation δ of the strip according to the entrance speed and exit speed of the tension leveling machine 1 ;

[0052] Step 3, compare the actual elongation δ of the strip 1 and the preset elongation δ of the strip 2 , calculate δ 1 and δ 2 the difference;

[0053] Step 4, according to δ 1 and δ 2 The difference value controls the inlet speed and outlet speed of the stretch bending straightening machine.

[0054] The automatic control method of strip elongation provided in this embodiment is to use preset elongation δ 2 and measured actual elongation δ 1 The difference between elongation produces an additional speed given value to change the speed of entranc...

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Abstract

The invention provides a band steel stretch-bending straightening system with capable of controlling the elongation rate and a control method thereof, wherein the band steel stretch-bending straightening system comprises an unreeling inlet roller, a stretch-bending straightener, a reeling outlet roller, a first motor and a second motor, wherein the first motor and the second motor respectively drive the inlet roller and the outlet roller. The band steel stretch-bending straightening system is characterized by also comprising a band steel inlet, an outlet speed measuring device, a first speed regulator, a second speed regulator and an elongation rate computing control device. The band steel stretch-bending straightening system capable of controlling the elongation rate and the automatic control method of the elongation rate of the band steel can realize the closed-loop control to the elongation rate of the band steel in the stretch-bending, straightening and producing processes of the band steel, have the advantages of high automation degree, simple, convenient and rapid operation, high stability and high precision and greatly improve the leveling production of the band steel and the quality of a processing product of the band steel.

Description

technical field [0001] The invention relates to the production field of cold-rolled steel plate materials, in particular to a strip bending straightening system and a control method thereof with controllable elongation. technical background [0002] Strip bending straightening is an important link to improve the shape and mechanical properties of strip steel products. Elongation is one of the important deformation indicators for stretch bending straightening. It plays an important role in ensuring the mechanical properties of strip steel and meeting user requirements. important role. In the range of small deformation, the strip is stretched and straightened to reduce its yield limit to the minimum value, and at the same time, the yield platform disappears. With the increase of elongation, the strip steel will undergo work hardening, which will increase the yield limit. Therefore, the elongation should be controlled within the range that can eliminate the yield plateau and ...

Claims

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Application Information

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IPC IPC(8): B21D1/02B21B37/56
Inventor 张汉华庞浩
Owner 上海精祥企业发展有限公司
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