CN105643360A - Control method of empty curving molding set for straight seam electric resistance welded pipe - Google Patents

Abstract

The invention provides a control method of an empty curving molding set for a straight seam electric resistance welded pipe. The method comprises the following steps: an electric roller drives the steel pipe to start from the original point and advance at a constant speed; an encoder of a speed measuring roller gives feedback of the current position of the steel pipe to a processor; the processer determines the starting time and the accelerated speed of a saw mill according to the cutting length and the position of the steel pipe and sends out a starting instruction to a saw mill motor; the starting instruction comprises the starting time and the accelerated speed during chasing; the saw mill motor receives the starting instruction of the processor, starts from the original point, chases after the steel pipe at the accelerated speed to the cutting position and cuts the steel pipe; and the saw mill motor returns to the original point and waits for cutting the next section of a steel pipe. According to the control method, full-automatic length-fixing cutting is achieved; halt of the set is avoided, so that the production efficiency is greatly improved; and the cutting precision is high, few errors are caused, and the operation is easy and convenient.

Description

The empty roll forming unit controlling party method of longitudinal resistance welded pipe

Technical field

The embodiment of the present invention relates to technical field of metal material manufacture, particularly relates to the empty roll forming unit controlling party method of a kind of longitudinal resistance welded pipe.

Background technology

Straight seam resistance welding steel pipe English abbreviation is ERW, has the high and low cost of production efficiency, saves material, is easy to the features such as automatization. Production Flow Chart is: vertical cuts-uncoiling-band steel leveling-shearings-band steel butt welding end to end-works cover storage material-shaping-welding-deburring-determines footpath-detect a flaw-fly and cut-the first inspection-steel pipe aligning-pipeline section processing-water test-carrying out flaw detection-printing and coating-finished product. The principal element of impact straight seam resistance welding steel pipe: input heat, welding pressure, welding speed, opening angle, the placement position etc. of impedor. It is widely used in water supply and sewage work, oil and gas engineering, it is possible to as piling pipe, make bridge; Harbour, road, building structure pipe etc.

There is cutting error greatly in of the prior art point of Length-fixing cutting, precision is not high, and easily damages blade, it is necessary to changes the problems such as production efficiency is low back and forth.

Summary of the invention

The embodiment of the present invention provides a kind of longitudinal resistance welded pipe empty roll forming unit controlling party method, to overcome above-mentioned technical problem.

The empty roll forming unit controlling party method of longitudinal resistance welded pipe of the present invention, comprising:

Described electromotive roller drives described steel pipe at the uniform velocity to advance from initial point;

The current position of described steel pipe is fed back to described treater by the encoder of the described roller that tests the speed;

Described treater is determined to saw time of departure of car and acceleration according to the Cutting Length of steel pipe and position, and saws vehicle motor and send out and send instructions, described in go out to send instructions to comprise time of departure and pursuit acceleration;

Described saw vehicle motor receive described treater go out to send instructions, accelerate the described steel pipe of pursuit to described cutting position from described initial point, and cut described steel pipe;

Described saw vehicle motor returns next section of steel pipes to be cut such as described initial point.

Further, described treater determines to saw time of departure and the acceleration of car according to described speed, cutting position and position, comprising:

Treater is according to formula

S₀=S₁-S₂(1)

Determine to saw the pursuit distance of car, wherein, described S₀For sawing the pursuit distance of car, described S₁For Cutting Length, described S₂For the pre-operating range of steel pipe;

Described treater is according to formula

T₀=S₀/V₀(2)

Determine to saw the catch-up time of car, wherein, described T₀For sawing the catch-up time of car, described V₀For the speed of steel pipe uniform motion;

Described treater is according to formula

$S_0=\frac{1}{2}{\mathrm{aT}}_0^2---\left(3\right)$

Determining to saw the pursuit acceleration of car, wherein, described a is the pursuit acceleration of saw car.

The inventive method improves production efficiency; cutting accuracy height, error is little, flies saw and steadily is not easy to damage; reduce the noise in production process; the steel pipe impulse-free robustness of cutting, cross section perpendicular degree height, equipment failure rate is low; it is convenient to maintenance; compressor emergency shutdown is avoided greatly to improve production efficiency, and cutting accuracy high level error is little, easy and simple to handle.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, it is briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the schema of the empty roll forming unit controlling party method of longitudinal resistance welded pipe of the present invention.

Embodiment

For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments. Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.

Fig. 1 is the schema of the empty roll forming unit controlling party method of longitudinal resistance welded pipe of the present invention, as shown in Figure 1, and the method for the present embodiment, it is possible to comprising:

Step 101, described electromotive roller drive described steel pipe at the uniform velocity to advance from initial point;

Step 102, described in the test the speed encoder of roller the current position of described steel pipe is fed back to described treater;

Step 103, described treater are determined to saw time of departure of car and acceleration according to the Cutting Length of steel pipe and position, and saw vehicle motor and send out and send instructions, described in go out to send instructions to comprise time of departure and pursuit acceleration;

Step 104, described saw vehicle motor receive described treater go out to send instructions, accelerate the described steel pipe of pursuit to described cutting position from described initial point, and cut described steel pipe;

Step 105, described saw vehicle motor return next section of steel pipes to be cut such as described initial point.

Specifically, when steel pipe go to test the speed roller time, the roller encoder that tests the speed starts counting, calculate length accordingly, when steel pipe is gone to apart from setting Cutting Length one segment distance time, fly to saw to start from initial point and do uniformly accelerated motion, until it is consistent with steel pipe speed to catch up with steel pipe, at this moment clamp clamping, saw blade cuts downwards, unclamps clamp and move rapidly to opposite direction until initial point wait is cut next time after cutting.

Entrance section:

Pinch the main driving of leveling and adopt DC speed regulation, the direct-connected encoder feedback of motor afterbody, it is desired to each motor is consistent with unit linear velocity coupling. Entrance section arranges an operator's console, installs button, and the control feeding device such as instrument, Abrollhaspel, pressure roller and tear head open, pinches leveling and Hydraulic Station.

Pinch centering and shaping:

By leader tape speed successively by each frame. ?he young shave a man's head ? that steals cuts open the sincere Tie �� Cha rofibus bus-type absolute value encoder of ? prolixity, and pass adjustment interface adopts frame one picture, it is achieved manually single motor, single chassis adjustment and single chassis, full frame adjustment automatically. The various passes debugged can store, call, and reach industrial computer when specification converts and automatically adjust to set specification. When namely inputting the caliber of production specification, wall thickness and material in operation interface, required specification adjusted to automatically by pass. Pinching initiatively, BD1 is passive, and initiatively, initiatively, CL is all passive for the upper roller of BD5, and main driving adopts DC speed regulation, the direct-connected encoder feedback of motor afterbody, it is desired to each motor is consistent with unit linear velocity coupling for BD2, BD3, BD4. Each motor-driven roll linear velocity point is roll diameter of roller.

Pinch centering and the shaping operator's console that arranges is installed the control such as button, instrument, display screen and pinched centering and shaped device.

Fin frame:

The main driving of fin frame adopts DC speed regulation, the direct-connected encoder feedback of motor afterbody, it is desired to each motor is consistent with unit linear velocity coupling. Motor-driven roll linear velocity point adopts formulae discovery below:

D=2 (sin ��) 2 �� OD+RD

Diameter-setting equipment:

The position of the edge-on roller of horizontal roller up and down and left and right of three frame SZ frames is adjusted in advance when specification converts; One frame turks-head roll four roller position is adjusted in advance when specification converts. The steel pipe welded enters SZ frame and turks-head roll successively, and it is qualified steel pipe that footpath is determined in the roll rolling driven by mair motor. The control of three frame SZ frames is consistent with FP frame. Turks-head roll up and down and left and right aligning adjustment adopt motor to drive the counting adjustment of Profibus bus-type absolute value encoder respectively.

Flying sawing machine:

Determining the good steel pipe in footpath through surveying the first of long codes device to photoelectricity switch, cylinder action drives coding wheel compresses bottom steel pipe, and when the 2nd to photoelectricity switch sender, encoder tanks calculates and starts. When survey long codes device count down to determine chi steel pipe length time sender, movable motor braking is opened, and the steel pipe that main clamp hydro-cylinder action steps up to run drives saw car synchronous walking, steps up mobile clamp, starting sawing motor and coolant pump motor, feed is cut to cut-out steel pipe. Sawing motor variable-frequency speed-regulating, driven by servomotor sawing feeding; F.F. �� work enters �� rewind. Sawing completes to move back after cutting initial point, opens two groups of clamps, and saw garage walks motor braking and stops, opening brake actuating again, and saw car returns initial point; After saw, roller-way rotation Accelerating Removal determines chi steel pipe simultaneously.

Blanking device:

When flying sawing machine sawing completes, clamp is opened complete when sending signal, and roller is to startup conveying steel pipe, and when pipe tail arrives the switching point arranged, roller-way stops; Turning over plate hydro-cylinder action pull-up and turn over plate, steel pipe rolls into collection along slope.

Further, described treater determines to saw time of departure and the acceleration of car according to described speed, cutting position and position, comprising:

Treater is according to formula

S₀=S₁-S₂(1)

Determine to saw the pursuit distance of car, wherein, described S₀For sawing the pursuit distance of car, described S₁For Cutting Length, described S₂For the pre-operating range of steel pipe;

Described treater is according to formula

T₀=S₀/V₀(2)

Determine to saw the catch-up time of car, wherein, described T₀For sawing the catch-up time of car, described V₀For the speed of steel pipe uniform motion;

Described treater is according to formula

$S_0=\frac{1}{2}{\mathrm{aT}}_0^2---\left(3\right)$

Determining to saw the pursuit acceleration of car, wherein, described a is the pursuit acceleration of saw car.

Specifically, cut the steel pipe of how much length as required, entering disc saw car by calculating steel pipe, when arriving preseting length, saw car starts to pursue steel pipe, arrives Cutting Length saw car and keeps synchronized in real time with steel pipe, clamp clamps, cutting, steel pipe is transported by runoff table, and saw car is just to being decelerated to stopping, saw car oppositely accelerates to top speed, and saw car returns initial point wait and cuts next time.

Illustrating, cutting distance is 400mm, the speed v 0 that namely regulation saw car is expert at and is gone to and reach steel pipe apart from initial point 400mm hourly velocity. Cutting Length is 12m, when flying the roller encoder to count that tests the speed before sawing to predeterminable range 11.6m, fly saw just to start to start, pursuit distance is 400mm, it catch up with steel pipe to cut at the uniform velocity afterwards, but have a little error, it is possible to the roller that tests the speed does not contact completely with steel pipe or in cutting process, steel pipe rocks, and error is at positive and negative about 2mm.

The round pipe external diameter �� 140���� 325mm manufactured in the present embodiment, wall thickness: 2��10mm, production rate: 0.1��0.2m/min. This production line joins detection original papers such as having used a large amount of displacement sensor, absolute value encoder, laser sensor, travel switch, proximity switch, coordinates programmable logic controller, industrial computer, it is achieved all fronts Automated condtrol of production line.

Last it is noted that above each embodiment is only in order to illustrate the technical scheme of the present invention, it is not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technology feature is carried out equivalent replacement; And these amendments or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.

Claims (2)

1. the empty roll forming unit controlling party method of longitudinal resistance welded pipe, it is characterised in that, comprising:

Described electromotive roller drives described steel pipe at the uniform velocity to advance from initial point;

The current position of described steel pipe is fed back to described treater by the encoder of the described roller that tests the speed;

Described treater is determined to saw time of departure of car and acceleration according to the Cutting Length of steel pipe and position, and saws vehicle motor and send out and send instructions, described in go out to send instructions to comprise time of departure and pursuit acceleration;

Described saw vehicle motor receive described treater go out to send instructions, accelerate the described steel pipe of pursuit to described cutting position from described initial point, and cut described steel pipe;

Described saw vehicle motor returns next section of steel pipes to be cut such as described initial point.

2. method according to claim 1, it is characterised in that, described treater determines to saw time of departure and the acceleration of car according to described speed, cutting position and position, comprising:

Treater is according to formula

S₀=S₁-S₂(1)

Determine to saw the pursuit distance of car, wherein, described S₀For sawing the pursuit distance of car, described S₁For Cutting Length, described S₂For the pre-operating range of steel pipe;

Described treater is according to formula

T₀=S₀/V₀(2)

Determine to saw the catch-up time of car, wherein, described T₀For sawing the catch-up time of car, described V₀For the speed of steel pipe uniform motion;

Described treater is according to formula

$S_0=\frac{1}{2}{\mathrm{aT}}_0^2---\left(3\right)$

Determining to saw the pursuit acceleration of car, wherein, described a is the pursuit acceleration of saw car.