CN102319739B - Rolling angle adjusting device for two-roller skew rolling piercing mill - Google Patents

Abstract

The invention discloses a rolling angle adjusting device for a two-roller skew rolling piercing mill. The device comprises a two-roller skew rolling piercing mill, hydraulic mechanisms, position sensors, hydraulic motors, side pressing screws, lead screws, a programmable controller and a human-computer interface, wherein the two-roller skew rolling piercing mill comprises a left roller and a right roller which are drum-shaped; the left roller is connected with two hydraulic mechanisms by two side pressing screws; each hydraulic mechanism is connected with one hydraulic motor and one position sensor respectively; the two hydraulic mechanisms are connected with each other by a lead screw; the connecting mode of the right roller is the same as that of the left roller; the right roller is connected with two hydraulic mechanisms by two side pressing screws; each hydraulic mechanism is connected with one hydraulic motor and one position sensor respectively; the two hydraulic mechanisms are connected with each other by a lead screw; the four position sensors are connected with the programmable controller; and the programmable controller is connected with the human-computer interface.

Description

Rolling angle adjusting device for two-roller skew rolling piercing mill

Technical field

The invention belongs to the technical field of steel pipe's production middle punch machine pass adjustment, be specifically related to rolling angle adjusting device for two-roller skew rolling piercing mill.

Background technology

Punch is the equipment of hollow hollow billet that solid pipe is pierced into.According to the structure of punch and the difference of perforation procedure deformation characteristics, punch can be divided into two large classes, and a class is press piercing mill and pushing piercing machine; Another kind of is Mannesmann piercing mill.Mannesmann piercing is that the servo-actuated top in the middle of the godet of the active roll that is in tilted layout with respect to rolling centerline by two, two fixed guide plates or active rotation and are positioned at consists of a ring seal pass, adjust roll roll off angle and be control pass one of important step.

At present usually adopt manual adjustments for the adjustment at Mannesmann piercing machine roll off angle, at first to unload two locking screws between the side pressure hydraulic mechanism, then control respectively this two hydraulic mechanisms, make it drive side pressure screw precession or back-out, thereby Roller. redress is arrived the angle that needs, the angle correctness checks by the inclination angle indicating dial on rotary drum, again leading screw is installed playback after angle adjustment is good, lock two hydraulic mechanisms, to guarantee that the roll off angle immobilizes in adjusting roll distance and the operation of rolling.Be more than the adjustment process at a roll roll off angle, another roll also will be by same step operation.

So this manual adjusting style is consuming time longer, hand labor intensity is large.According to the difference of rolling specs, pass is also just different, therefore adjusts the roll off angle process that is absolutely necessary.Manual mode has restricted the adjustment rhythm when changing rolling specs.

Summary of the invention

The objective of the invention is in order to solve the traditional approach process of adjusting the roll off angle comparatively loaded down with trivial detailsly, adjustment cycle is long, and labor intensive is many, has proposed a kind of rolling angle adjusting device for two-roller skew rolling piercing mill.

A kind of rolling angle adjusting device for two-roller skew rolling piercing mill of the present invention comprises Mannesmann piercing machine, hydraulic mechanism, position sensor, hydraulic motor, side pressure screw, leading screw, programmable controller and man-machine interface;

The Mannesmann piercing machine comprises left roll and right roll, left roll, right roll are the cydariform roll, left roll connects two hydraulic mechanisms by two side pressure screws, each hydraulic mechanism connects a hydraulic motor, connect by leading screw between two hydraulic mechanisms, hydraulic mechanism also connects respectively a position sensor; The connected mode of right roll and left roll is identical, right roll also connects two hydraulic mechanisms by two side pressure screws, each hydraulic mechanism connects a hydraulic motor, connects by leading screw between two hydraulic mechanisms, and hydraulic mechanism also connects respectively a position sensor; Four position sensors connect programmable controller, and programmable controller connects man-machine interface; Input the desired value at roll off angle by man-machine interface, export desired value to programmable controller; Four position sensors detect respectively the physical location of four side pressure screws, and the physical location of side pressure screw is exported to programmable controller, and programmable controller obtains roll off angle value of feedback; Programmable controller comparison object value and value of feedback are adjusted hydraulic mechanism, change the displacement of side pressure screw, form closed loop, adjust roll off angle value of feedback, make it consistent with roll off angle desired value;

Described programmable controller obtains roll off angle value of feedback and is specially: take the roll horizontal level as initial position, S is that two side pressure screws begin the stroke of precession or back-out from initial position, and stroke is consistent, and roll off angle θ is:

θ=arctg(2*S/L)

In formula: S is side pressure screw stroke, and L is the roll axial length, and L is known length, and S records by position sensor;

Described programmable controller is relatively after roll off angle desired value and roll off angle value of feedback, angle difference is converted to side pressure screw stroke, be specially: the known roll off angle θ that needs the roll of adjustment, make roll run to the angle of setting by the stroke of controlling the side pressure screw, the stroke S that roll off angle θ is converted to the side pressure screw is:

S=L/2*tgθ

Because when adjusting the roll off angle, roll is around roll axle center rotation, so the stroke of a side pressure screw is+S, the stroke of another side pressure screw is-S, with stroke+S ,-S is as the desired value of each self-operating of side pressure screw, position sensor detects the physical location of side pressure screw, as separately actual value, two cover hydraulic mechanisms are capable has become two independently position closed loops, drives simultaneously two cover hydraulic mechanisms and moves the physical location that detects.

The invention has the advantages that:

The present invention only needs operating personnel to input data on man-machine interface in whole operating process, realizes that the roll off angle controls automatically, thereby has simplified adjustment process, has shortened the adjustment time, has reduced hand labor intensity.

Description of drawings

Fig. 1 is structural representation of the present invention;

Fig. 2 is roll off angle computational methods schematic diagram;

Fig. 3 is roll off angle position closed loop schematic diagram;

In figure:

The specific embodiment

The present invention is described in further detail below in conjunction with drawings and Examples.

The present invention is a kind of rolling angle adjusting device for two-roller skew rolling piercing mill, as shown in Figure 1, comprises Mannesmann piercing machine, hydraulic mechanism 3, position sensor 4, hydraulic motor 5, side pressure screw 6, leading screw 7, programmable controller 11 and man-machine interface 12.

The Mannesmann piercing machine comprises left roll 1 and right roll 2, left roll 1, right roll 2 are the cydariform roll, left roll 1 connects two hydraulic mechanisms 3 by two side pressure screws 6, each hydraulic mechanism 3 connects a hydraulic motor 5, connect by leading screw 7 between two hydraulic mechanisms 3, hydraulic mechanism 3 also connects respectively a position sensor 4.

Right roll 2 is identical with the connected mode of left roll 1, right roll 2 also connects two hydraulic mechanisms 3 by two side pressure screws 6, each hydraulic mechanism 3 connects between 5, two hydraulic mechanisms 3 of a hydraulic motor and connects by leading screw 7, and hydraulic mechanism 3 also connects respectively a position sensor 4.

Four position sensors 4 connect programmable controller 11, and programmable controller 11 connects man-machine interface 12.

Input the desired value at roll off angle by man-machine interface 12, export desired value to programmable controller 11 after inciting somebody to action; Four position sensors 4 detect respectively the physical location of four side pressure screws 6, and the physical location of side pressure screw 6 is exported to programmable controller 11, and programmable controller 11 obtains roll off angle value of feedback; Programmable controller 11 comparison object value and values of feedback are adjusted hydraulic mechanism 3, form closed loop, adjust roll off angle value of feedback, make it consistent with roll off angle desired value.

Described programmable controller 11 obtains roll off angle value of feedback and is specially: as Fig. 2, take the roll horizontal level as initial position, S is that two side pressure screws 6 begin the stroke of precession or back-out from initial position, and stroke is consistent, just can guarantee that roll is around roll axle center rotation.Roll off angle θ is:

θ=arctg(2*S/L)

In formula: S is side pressure screw stroke, and L is the roll axial length, and L is known length, and S can record by position sensor 4.

Described programmable controller 11 is relatively after roll off angle desired values and roll off angle value of feedback, angle difference is converted to side pressure screw 6 strokes, be specially: the known roll off angle θ that needs the roll of adjustment, make roll run to the angle of setting by the stroke of controlling side pressure screw 6, the stroke S that roll off angle θ is converted to side pressure screw 6 is:

S=L/2*tgθ

Because when adjusting the roll off angle, roll is around roll axle center rotation, so the stroke of a side pressure screw 6 is+S that the stroke of another side pressure screw 6 is-S, with the stroke mistake! It is invalid to link.,-S is as the desired value of side pressure screw 6 each self-operatings, position sensor 4 detects the physical location of side pressure screws 6, and as separately actual value, two overlap hydraulic mechanism 3 row has become two independently position closed loops the physical location that detects, as Fig. 3, can drive simultaneously two cover hydraulic mechanism 3 actions.

The course of work:

Left roll 1 and right roll 2 have horizontal center line 9, the Mannesmann piercing machine rolling centerline 8 arranged, when the horizontal center line 9 of roll kept level with rolling centerline 8, the roll off angle was 0 °, the roll off angle of roller 1 as left in Fig. 1 is 0 °, and the roll off angle of right roller 2 is θ.Set the roll off angle by man-machine interface 12, man-machine interface 12 exports the roll off angle to programmable controller 11, programmable controller 11 with the roll off angle as desired value, four hydraulic motors 5 start, drive four hydraulic mechanisms 3, two hydraulic mechanisms 3 of left roll 1 one sides are by leading screw 7 lockings, two hydraulic mechanisms 3 advance left roll 1 and pull out by two side pressure screws 6, two position sensors 4 detect respectively the physical location of two side pressure screws 6, export the physical location of two side pressure screws 6 to programmable controller 11.Two hydraulic mechanisms 3 of right roll 2 one sides are by leading screw 7 lockings, two hydraulic mechanisms 3 advance right roll 2 and pull out by two side pressure screws 6, two position sensors 4 detect respectively the physical location of two side pressure screws 6, export the physical location of two side pressure screws 6 to programmable controller 11.Programmable controller 11 obtains the roll off angle of left roll 1 and right roll 2 by the physical location of side pressure screw 6, programmable controller 11 compares roll off angle value of feedback and the roll off angle desired value that obtains, then control command, export control command to hydraulic mechanism 3, two hydraulic mechanisms 3 of left roll 1 one sides drive 6 one back-outs backward of precession forward of two side pressure screws, make roll around the axle center axial rotation, form the roll off angle.Two hydraulic mechanisms 3 of right roll 2 one sides drive 6 one, two side pressure screws forward one of precession screw out backward, make roll around the axle center axial rotation, form the roll off angle.When roll off angle value of feedback was consistent with roll off angle desired value, when namely roll arrived the roll off angle of setting, hydraulic mechanism 3 was out of service, and the roll off angle adjustment process of a roll finishes.

The present invention can realize that punch roll off angle adjusts automatically, thereby shortens the adjustment time when changing rolling specs.

Claims (1)

1. a rolling angle adjusting device for two-roller skew rolling piercing mill, be applied to the Mannesmann piercing machine, comprises hydraulic mechanism, position sensor, hydraulic motor, side pressure screw, leading screw, programmable controller and man-machine interface;

The Mannesmann piercing machine comprises left roll and right roll, left roll, right roll are the cydariform roll, left roll connects two hydraulic mechanisms by two side pressure screws, each hydraulic mechanism connects a hydraulic motor, connect by leading screw between two hydraulic mechanisms, hydraulic mechanism also connects respectively a position sensor; The connected mode of right roll and left roll is identical, right roll also connects two hydraulic mechanisms by two side pressure screws, each hydraulic mechanism connects a hydraulic motor, connects by leading screw between two hydraulic mechanisms, and hydraulic mechanism also connects respectively a position sensor; Four position sensors connect programmable controller, and programmable controller connects man-machine interface; Input the desired value at roll off angle by man-machine interface, export desired value to programmable controller; Four position sensors detect respectively the physical location of four side pressure screws, and the physical location of side pressure screw is exported to programmable controller, and programmable controller obtains roll off angle value of feedback; Programmable controller comparison object value and value of feedback are adjusted hydraulic mechanism, change the displacement of side pressure screw, form closed loop, adjust roll off angle value of feedback, make it consistent with roll off angle desired value;

Described programmable controller obtains roll off angle value of feedback and is specially: take the roll horizontal level as initial position, S is that two side pressure screws begin the stroke of precession or back-out from initial position, and stroke is consistent, and roll off angle θ is:

θ=arctg(2*S/L)

In formula: S is side pressure screw stroke, and L is the roll axial length, and L is known length, and S records by position sensor;

Described programmable controller is relatively after roll off angle desired value and roll off angle value of feedback, angle difference is converted to side pressure screw stroke, be specially: the known roll off angle θ that needs the roll of adjustment, make roll run to the angle of setting by the stroke of controlling the side pressure screw, the stroke S that roll off angle θ is converted to the side pressure screw is:

S=L/2*tgθ

Because when adjusting the roll off angle, roll is around roll axle center rotation, so the stroke of a side pressure screw is+S, the stroke of another side pressure screw is-S, with stroke+S ,-S is as the desired value of each self-operating of side pressure screw, position sensor detects the physical location of side pressure screw, as separately actual value, two cover hydraulic mechanisms are capable has become two independently position closed loops, drives simultaneously two cover hydraulic mechanisms and moves the physical location that detects.

Images