SU1004579A1

SU1004579A1 - Guiding mechanism of reinforcement-wrapping machine

Info

Publication number: SU1004579A1
Application number: SU813335829A
Authority: SU
Inventors: Федор Борисович Нежинов; Виктор Иванович Евдокимов
Original assignee: Предприятие П/Я А-1940
Priority date: 1981-09-14
Filing date: 1981-09-14
Publication date: 1983-03-15

Description

Изобретение относится к строительству, а именно к устройствам для предварительного напряжения арматуры.The invention relates to construction, and in particular to devices for prestressing reinforcement.

Известен направляющий механизм. арматурно-навивочной машины, содержащий вращающийся диск с огибающей его арма- ⁵турой, шарнирно' связанный с ним через коромысло шток поршня измерительного цилиндра и манометр [f].Known steering mechanism. a reinforcing-winding machine, containing a rotating disk with its armature envelope ⁵ , a piston rod of the measuring cylinder and a manometer [f] pivotally connected to it through the rocker arm.

Недостатком известного механизма является пониженная точность силы натяже- ₁₀ния арматуры вследствие трения в системе цилиндр—поршень и люфтов в шарнирных соединениях узлов механизма, что приводит к неоднозначности показаний . манометра при колебаниях усилия натяжения.The disadvantage of this arrangement is the reduced accuracy tension force Nia armature ₁₀ due to friction in the cylinder-piston system and backlash in the joints of the mechanism components, which leads to an ambiguity indication. pressure gauge with fluctuations in tension.

Наиболее близким к предлагаемому яв- 15 ляется направляющий механизм, арматурно-навивочной машины, содержащий закрепленный на ней вращающийся в подшипниках диск с размещенными на его стенке чувствительными элементами и регистрирующий прибор [2]. ²⁰ The closest to the proposed one is the guiding mechanism of the reinforcing-winding machine, which contains a disk rotating in bearings mounted on it with sensitive elements placed on its wall and a recording device [2]. ²⁰

Недостатки известного механизма заключаются в сложности расшифровки и интерпретации результатов поляризационно-оптических измерений, проведение которых до настоящего времени затруднено в производственных условиях. Необходимые специальные меры по обеспечению несмещаемости элементов устройства во время навивки. Если во время работы арматурно-навивочной машины будет происходить смещение оптической оси относительно чувствительного элемента, результат измерения будет содержать погрешность, величину которой заранее трудно оценить.The disadvantages of the known mechanism are the difficulty of decoding and interpreting the results of polarization-optical measurements, the implementation of which is still difficult in the production environment. Necessary special measures to ensure the non-displaceability of the elements of the device during winding. If during operation of the armature-winding machine a shift of the optical axis relative to the sensitive element occurs, the measurement result will contain an error, the value of which is difficult to estimate in advance.

Цель изобретения — упрощение процесса измерения усилия натяжения арматуры и повышение надежности работы устройства.The purpose of the invention is to simplify the process of measuring the tension force of the reinforcement and increase the reliability of the device.

Цель достигается тем, что направляющий механизм арматурно-навивочной машины, содержащий закрепленный на ней вращающийся в подшипниках диск, с размещенными на нем чувствительными элементами и регистрирующий усилие натяжения прибор, снабжен синхронизатором, чувствительные элементы выполнены в виде тензорезисторов, соединенных по схеме моста и попарно размещенных во взаимно перпендикулярных диаметральных направлениях, подшипники, количество которых равно ко личеству вершин моста, электрически изолированы друг от друга, а также от диска и арматурно-навивочной машины, каждая вершина моста соединена с вращающимся кольцом соответствующего подшипника, неподвижные кольца подшипников соединены с соответствующими входами регистрирующего прибора, ко входу которого также подключен синхронизатор.The goal is achieved by the fact that the guiding mechanism of the reinforcing-winding machine, containing a disk rotating in bearings mounted on it, with the sensing elements placed on it and recording the tension force of the device, is equipped with a synchronizer, the sensitive elements are made in the form of strain gages connected according to the bridge scheme and placed in pairs in mutually perpendicular diametrical directions, bearings, the number of which is equal to the number of axle tops, are electrically isolated from each other, as well as from the disk as well as of the reinforcing-winding machine, each vertex of the bridge is connected to the rotating ring of the corresponding bearing, the stationary rings of the bearings are connected to the corresponding inputs of the recording device, to the input of which a synchronizer is also connected.

Подшипники установлены в герметичных корпусах, заполненных маслом.The bearings are mounted in sealed cases filled with oil.

На фиг. 1 изображено устройство, общий вид; на фиг. 2 — разрез А—А на фиг. 1; на фиг. 3 — то же, вариант исполнения: на фиг. 4 — структурная схема соединения элементов устройства.In FIG. 1 shows a device, a General view; in FIG. 2 — section A — A in FIG. 1; in FIG. 3 - same, embodiment: in FIG. 4 is a structural diagram of the connection of the elements of the device.

Направляющий механизм содержит закрепленный на арматурногнавивочной машине 1 диск 2, вращающийся в подшипниках 3. Диск огибает напрягаемая арматура 4. На стенке диска размещены чувствительные элементы 5, выполненные в виде тензорезисторов, например, R1—R4. Тензорезисторы соединены по схеме полного сбалансированного моста и попарно размещены во взаимно перпендикулярных диаметральных направлениях. Подшипники 3 электрически изолированы от диска 2 и арматурно-навивочной машины 1, например, посредством установки их во втулке 6 на оси 7, выполненных из изоляционных материалов. Каждая вершина моста подключена к одному из вращающихся колец подшипников 3. В варианте с неподвижной осью диска выводы моста подключены к внешним кольцам 8, а в варианте с вращающейся осью диска — к внутренним кольцам 9 подшипников 3. Неподвижные кольца подшипников подключены к соответствующим входам регистрирующего прибора 10, к входу которого также подключен синхронизатор 11. Подшипники 3 установлены в герметичных корпусах 12, заполненных маслом, например, трансформаторным.The guiding mechanism contains a disk 2 mounted on a reinforcing machine 1, rotating in bearings 3. The disk is encircled by prestressing reinforcement 4. Sensitive elements 5, made in the form of strain gages, for example, R1 – R4, are placed on the disk wall. Strain gages are connected according to the scheme of a full balanced bridge and are placed in pairs in mutually perpendicular diametrical directions. The bearings 3 are electrically isolated from the disk 2 and the reinforcing machine 1, for example, by installing them in the sleeve 6 on the axis 7, made of insulating materials. Each vertex of the bridge is connected to one of the rotating rings of the bearings 3. In the variant with the fixed axis of the disk, the terminals of the bridge are connected to the outer rings 8, and in the variant with the rotating axis of the disk, to the inner rings 9 of the bearings 3. The stationary rings of the bearings are connected to the corresponding inputs of the recording device 10, to the input of which a synchronizer 11 is also connected. Bearings 3 are installed in sealed housings 12 filled with oil, for example, transformer.

Устройство работает следующим образом.The device operates as follows.

Усилия, возникающие в навиваемой арматуре 4, передаются на диск 2, вызывая радиальную деформацию сектора диска, ограниченного точками касания каната. Максимального значения указанная деформация достигает по линии биссектрисы центрального угла <Л, образующего нагружаемый сектор. При вращении диска 2 продольные оси каждого из тензорезисторов 5 поочередно совпадают с линией максимальной деформации. Именно в этот момент формируется управляющий импульс синхронизатора 11, по команде которого срабатывает регистрирующий прибор 10 и происходит измерение сигнала разбаланса моста. Таким образом, за один оборот диска происходит многократное дискретное измерение усилия натяжения каната. Сигналы разбаланса и питания измерительного моста подаются к соответствующим его диаго налям через подшипники 3, полностью погруженные в трансформаторное масло, что устраняет искрообразование и стабилизирует переходные сопротивления электрических контактов между вращающимися и неподвижными кольцами подшипников.The forces arising in the winding reinforcement 4 are transferred to the disk 2, causing a radial deformation of the sector of the disk, limited by the points of contact of the rope. The indicated strain reaches its maximum value along the bisector line of the central angle <A, which forms the loaded sector. When the disk 2 rotates, the longitudinal axis of each of the strain gauges 5 alternately coincide with the line of maximum deformation. It is at this moment that the control pulse of the synchronizer 11 is formed, at the command of which the recording device 10 is activated and the bridge unbalance signal is measured. Thus, in one revolution of the disk there is a multiple discrete measurement of the tension of the rope. The imbalance and power signals of the measuring bridge are fed to their respective diagonals through bearings 3, completely immersed in transformer oil, which eliminates spark formation and stabilizes the transient resistances of the electrical contacts between the rotating and stationary bearing rings.

Возможен вариант, при котором источник питания размещен непосредственно на диске 2, в том случае возможно либо уменьшение вдвое числа подшипников, либо увеличение числа чувствительных элементов.A variant is possible in which the power source is located directly on the disk 2, in which case it is possible either to halve the number of bearings or increase the number of sensitive elements.

В качестве синхронизатора 11 может быть применен, например, светочувствительный элемент и источник света, расположенные по обе стороны диска. При этом в верхней части диска по продольным осям тензорезисторов высверливаются сквозные отверстия. В момент прохождения тензорезистором линии максимальной деформации свет от источника попадает через отверстие на светочувствительный элемент, в результате чего синхронизатор 11 формирует импульс, запускающий регистрирующий прибор 10.As a synchronizer 11, for example, a photosensitive element and a light source located on both sides of the disk can be used. At the same time, through holes are drilled in the upper part of the disk along the longitudinal axes of the strain gages. At the moment the strain gauge passes the line of maximum deformation, the light from the source enters the photosensitive element through the hole, as a result of which the synchronizer 11 generates a pulse that starts the recording device 10.

Благодаря использованию изобретения упрощается процесс контроля усилия натяжения арматуры при навивке. Результаты тензометрических измерений не нуждаются в дополнительной расшифровке, они связаны простой функциональной зависимостью с усилием в арматуре, что облегчает их интерпретацию. На работу направляющего блока не оказывает влияние вибрация арматурно-навивочной машины. Изменения температуры компенсируются включением тензорезисторов по схеме полного моста. Экспериментально доказано, что подшипники, подпружиненные в трансформаторное масло, стабильно и без искажений передают измерительный сигнал с вращающихся деталей. В целом использование изобретения повышает надежность работы арматурно-навивочной машины.Thanks to the use of the invention, the process of controlling the tension force of the reinforcement during winding is simplified. The results of tensometric measurements do not need additional decoding; they are connected by a simple functional dependence with the force in the reinforcement, which facilitates their interpretation. The vibration of the armature winding machine does not affect the operation of the guide block. Temperature changes are compensated by the inclusion of strain gages according to the full bridge scheme. It has been experimentally proved that bearings, spring-loaded in transformer oil, transmit the measuring signal from rotating parts stably and without distortion. In General, the use of the invention increases the reliability of the armature-winding machine.

Claims

(54) GUIDANCE MECHANISM OF REFERENCE AND MANUFACTURING MACHINE The invention relates to construction, namely to devices for prestressing reinforcement. Known guiding mechanism. reinforcing and coiling machine, containing a rotating disk with an envelope around its reinforcement, a hinged piston rod of the measuring cylinder and a pressure gauge f. The disadvantage of the known mechanism is the accuracy of the tension force of the reinforcement due to friction in the system of cylinder-piston and backlash in the hinged joints of the mechanism, which leads to ambiguity of evidence. manometer with tension fluctuations. The most promising approach to this invention is a guide mechanism, a reinforcement-winding machine, containing a disk fixed on it rotating in ball bearings with sensitive elements placed on its wall and a recording device 2. The disadvantages of this mechanism are the difficulty of deciphering and interpreting the results of the polarization optical measurements, which are still difficult to carry out under production conditions. Necessary special measures to ensure the non-displaceability of the elements of the device during winding. If during the operation of the reinforcement coiling process, an optical axis is shifted relative to the sensing element, the measurement result will contain an error, the value of which is difficult to estimate in advance. The purpose of the invention is to simplify the process of measuring the tension of the reinforcement and increase the reliability of the device. The goal is achieved by the fact that the guide mechanism of the reinforcement-winding machine, containing a disk mounted on it rotating in bearings, with sensing elements placed on it and registering the tensile force of the device, is equipped with a synchronizer, the sensing elements are made in the form of strain gages connected according to the bridge and pairwise placed in mutually perpendicular diametrical directions, the bearings, the number of which is equal to the number of vertices of the bridge, are electrically isolated from each other, as well as from disk and reeling machine, each top of the bridge is connected to the rotating ring of the corresponding bearing, fixed rings of the bearings are connected to the corresponding inputs of the recording device, to the input of which the synchronizer is also connected. Bearings are installed in sealed housings filled with oil. FIG. 1 shows the device, a general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 is the same as the embodiment; in fig. 4 is a block diagram of the connection elements of the device. The guide mechanism contains a disk 2 mounted on a reinforcement bar 1, rotating in bearings 3. The disk bends around tensioned fitting 4. Sensitive elements 5 are placed on the disk wall, made in the form of resistance strain gages, for example, R1-R4. Strain gages are connected according to the full balanced bridge scheme and placed in pairs in mutually perpendicular diametrical directions. The bearings 3 are electrically isolated from the disk 2 and the reinforcement coiling machine 1, for example, by installing them in the sleeve 6 on the axis 7 made of insulating materials. Each top of the bridge is connected to one of the rotating rings of the bearings 3. In the version with a fixed disk axis, the bridge outputs are connected to the outer rings 8, and in the version with the rotating disk axis to the inner rings 9 of the sub-carriers 3. The fixed rings of the sub-plates are connected to the corresponding inputs of the recording device 10, to the input of which the synchronizer 11 is also connected. The bearings 3 are installed in hermetic housings 12 filled with oil, for example, transformer oil. The device works as follows. The forces arising in the wound reinforcement 4 are transmitted to the disk 2, causing radial deformation of the sector of the disk bounded by the points of contact of the rope. The maximum value of this deformation reaches along the bisector of the central angle оС forming the loadable sector. When the disk 2 rotates, the longitudinal axes of each of the strain gauges 5 alternately coincide with the line of maximum deformation. It is at this moment that the control pulse of the synchronizer 11 is formed, at the command of which the recording device 10 is triggered and the unbalance signal of the bridge is measured. Thus, a multiple discrete measurement of the tension of the tension of the rope takes place during one revolution of the disk. The unbalance and power signals of the measuring bridge are fed to the corresponding diameters through bearings 3, completely immersed in transformer oil, which eliminates sparking and stabilizes the transient resistances of the electrical contacts between rotating and stationary rings of the sub-carriers. It is possible that the power source is placed directly on the disk 2, in which case it is possible to either halve the number of bearings or increase the number of sensitive elements. As the synchronizer 11 can be applied, for example, a photosensitive element and a light source located on both sides of the disk. In this case, through holes are drilled along the longitudinal axes of the strain gauges in the upper part of the disk. At the moment when the strain gauge passes the maximum deformation line, light from the source passes through the aperture of the photosensitive element, as a result of which synchronizer 11 generates a pulse that triggers the recording device 10. Through the use of the invention, the process of controlling the tension of the reinforcement during winding is simplified. The results of strain gauge measurements do not need additional deciphering, they are associated with a simple functional relationship with the effort in the reinforcement, which facilitates their interpretation. The operation of the guide block is not affected by the vibration of the reinforcement-winding machine. Temperature changes are compensated by the inclusion of strain gauges in a full bridge circuit. It has been experimentally proven that bearings, spring-loaded into transformer oil, consistently and without distortion transmit a measuring signal from rotating parts. In general, the use of the invention increases the reliability of the rebar-masking equipment. Claims 1. A guide mechanism of a reeling machine, containing a disk mounted on it rotating in bearings with sensing elements placed on it and recording a tensile force device, characterized in that, in order to simplify the process of measuring the tension of the reinforcement and increase reliability operation of the device, it is equipped with a synchronizer, sensitive elements are made in the form of strain gauges connected according to the bridge circuit and placed in pairs in mutually perpendicular diametrically The bearings, the number of which is equal to the number of vertices of the bridge, are electrically isolated from each other, as well as from the disk and reinforcement winder, each vertex

the bridge is connected to the rotating ring of the corresponding bearing, the fixed rings of the bearings are connected to the corresponding inputs of the recording device, to the input of which the synchronizer is also connected.

2. A mechanism according to claim 1, characterized in that, in order to eliminate sparking and stabilize transient resistance.

Podschipniki installed in sealed enclosures filled with oil.

Sources of information taken into account in the examination

1. USSR author's certificate number 204216, cl. E 04 G 21/12, 1967.

2. USSR author's certificate for application number 2975330 / 23-33, cl. E 04 G 21/12, 1980 (prototype).

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