SU990369A1

SU990369A1 - Tube bending machine

Info

Publication number: SU990369A1
Application number: SU813245489A
Authority: SU
Inventors: Сергей Юрьевич Голубев; Юрий Пантелеевич Кондратенко; Василий Игоревич Миронов; Александр Николаевич Ткаченко
Original assignee: Николаевский Ордена Трудового Красного Знамени Кораблестроительный Институт Им.Адм.С.О.Макарова
Priority date: 1981-02-09
Filing date: 1981-02-09
Publication date: 1983-01-23

Description

(54) СТАНОК ДЛЯ ГИБКИ ТРУБ(54) MACHINE FOR BENDING PIPES

1one

Изобретение относитс к обработке металлов давлением, в частности к устройствам дл гибки труб.The invention relates to the processing of metals by pressure, in particular to devices for bending pipes.

Известен трубогибочный станок, содержащий поворотный гибочный шаблон и плиту с закрепленными на ней обкатным роликом и блоком калибрующих роликов 1 .Known pipe bending machine containing a rotary bending template and plate attached to her roll-in roller and the block calibrating rollers 1.

Недостатками известного устройства вл ютс низкое качество гнутых изделий из-за овализации их поперечного сечени и трудоемкость перенастройки калибрующих роликов при изменении кривизны и диаметра изгибаемой трубы - заготовки.The disadvantages of the known device are the low quality of the bent products due to the ovalization of their cross-section and the laboriousness of reconfiguring the calibrating rollers when changing the curvature and diameter of the bent pipe - blank.

Целью изобретени вл етс улучшение качества изделий путем автоматической калибровки сечени трубы в процессе ее гибки.The aim of the invention is to improve the quality of products by automatically calibrating the cross section of the pipe during its bending.

Указанна цель достигаетс тем, что станок дл гибки труб, содержа1ций закрепленный на валу шаблон, прижим и плиту с обкатным роликом и блоком калибрующих роликов, снабжен механизмом корректирующим форму сечени трубы, выполненным в виде установленной на плите опоры с наклонными пазами, установленной в пазах приводной каретки и подвижно смонтиройанной на каретке головки с двум взаимно перпендикул рными цилиндрическими роликами и с датчиком их перемещени , а также приводом перемещени калибрующих роликов с системой-управлени , св занной с упом нутым механизмом.This goal is achieved by the fact that the machine for bending pipes containing a template fixed on the shaft, a clamp and a plate with a rolling roller and a block of calibrating rollers is provided with a mechanism correcting the shape of the pipe section made in the form of a support with inclined grooves installed on the plate and driving a carriage and a head movably mounted on a carriage with two mutually perpendicular cylindrical rollers and with a sensor for their movement, as well as a movement drive for calibrating rollers with a control system, bound to said mechanism.

Кроме того, система управлени выполнена в виде св занного с калибрующими роликами датчика их начального положени , генератора задающего сигнала, блока переключени , усилител , при этом входы In addition, the control system is made in the form of their initial position, the generator of the setting signal, the switching unit, the amplifier connected with the calibrating rollers of the sensor, and the inputs

10 блока переключени соединены с генератором и обоими датчиками, а выходы - с приводом каретки и через усилитель с приводом калибрующих роликов.10 of the switching unit are connected to a generator and both sensors, and the outputs are connected to a carriage drive and through an amplifier with a drive of calibrating rollers.

На фиг. 1 представлена схема станка;FIG. 1 shows a diagram of the machine;

15 на фиг. 2 - корректирующий механизм; на фиг. 3 - схема расположени роликов корректирующего механизма.15 in FIG. 2 - corrective mechanism; in fig. 3 shows the arrangement of the rollers of the correction mechanism.

Claims

The machine contains a template 2 fixedly mounted on the shaft 1, a clamp 3, a plate 4 with a facing face 5 fixed on it, calibrating rollers 6, and a support 7 of the correcting mechanism. A carriage 8 is mounted on the support 7 in inclined grooves, which is connected to the actuator 9 by means of a spring 10. On the guide carriages 8, a head 11 is installed with two rigidly interconnected and placed mutually perpendicular rollers 12 and 13, and a displacement sensor 14. Machine It also has a control system containing a master signal generator 15, a switching unit 16, an amplifier 17, and an initial position sensor 18. The inputs of the switching unit 16 are connected to a master signal generator 15 (power source), an initial position sensor 18, and a sensor displacement 14. The outputs of the switching unit 16 are connected to the drive 9 of the carriage 8 and through the amplifier 17 to the drive 19 of the gauge roller assembly. In order to bend, when bending pipes with different diameters of sections, the zero position of the displacement sensor 14, which corresponds to the circular section of the pipe 20, does not move, the longitudinal axis of the carriage 8 is at an angle di. The angle can be defined (Fig. 3); where CjC is the displacement of the point of intersection of the axes of the rollers 12 and 13 when changing the diameter of the pipe 20; To the point of contact of the pipe bending shablon 2; O | O2 - the centers of circles of sections of pipes 20; - POINTS tangent to rollers 12 and 13 with pipes 20 / ЛООЗ-Л.О, f, г г о (arctgl-2- Warcig - arctgCO, 5) kVi - К, УV2Ar / 26 ° 37. The device operates as follows. Before the flexible correction mechanism is in the initial, maximally distant position from the pipe-billet 20 mounted on the template 2 and clamped by the clamp 3, and the calibrating rollers 6 are separated. Bending begins with the fact that the signal generator 5 receives a signal, which through the switching unit 6 and the amplifier 7 is fed to the actuator 19. The actuator 19 moves the calibrating rollers 6 to the initial position, putting them in contact with the workpiece pipe 20. At the same time, under the action of the actuator 9 is supplied to the workpiece tube 20 before the rollers 12 and 13 contact it. When the block of the calibrating rollers 6 and the correcting mechanism reach the initial position, the initial position sensor 18 is activated, the signal from which is fed to the input block 16. The switching unit 6 switches off the switching amplifier 7 from drive signal generator 5 and the drive 19 - from the power supply, wherein when connected to the input of the amplifier 7 output displacement sensor 14, thus closing the feedback loop correction mechanism. The feedback signal is the polarity and magnitude of the displacement sensor signal 14. This signal is formed as a result of horizontal or vertical movement of the rollers 12 or 13 during ovalization, i.e. deviations of the cross section of the bendable pipe 20 from the circle. Then, the drive of the bending plate 2 is turned on and the flexible tube 20 starts, while the calibration mechanism continuously monitors the occurrence of ovality by giving a feedback signal from the displacement sensor 14 through amplifier 7 to drive 19, which moves the calibration rollers 6 depending on the polarity of the feedback signal to or from the center of the pipe, increasing or decreasing their pressure on the pipe 20 in order to eliminate the ovality of its cross section. The use of the proposed device improves the quality of bent products and the performance of the tube bending machine. Claim 1. A machine for bending pipes containing a template fixed on a shaft, a clamp and a plate with a rolling roller and a block of calibrating rollers, characterized in that, in order to improve the quality of products, it is equipped with a mechanism for correcting the shape of a pipe section made in the form of on the support plate with inclined grooves, mounted in the slots of the drive carriage and movably mounted on the carriage with two mutually perpendicular cylindrical rollers and with their movement sensor, as well as the control system and bound to its actuator movement gauging rollers.

2. The machine according to claim 1, characterized in that the control system is made in the form of an initial position, a driver signal generator, a switching unit and an amplifier associated with the calibrating rollers of the sensor, and the inputs of the switching unit are connected to a generator and both sensors, and the outputs - with a carriage drive and through an amplifier with a drive of calibrating rollers. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 573224, cl. B 21 D 9/00, 04.14.76 (prototype).