SU561084A1

SU561084A1 - Device for etching foil strain gauges

Info

Publication number: SU561084A1
Application number: SU1985332A
Authority: SU
Inventors: Юрий Михайлович Базжин; Семен Ошарович Львович
Original assignee: Научно-Исследовательский И Контсрукторский Институт Испытательный Машин Приборов И Средств Измерения Масс
Priority date: 1973-12-25
Filing date: 1973-12-25
Publication date: 1977-06-05

Description

1one

Изобретение относитс к измерительной технике, а именно, к измерени м деформаций фольговыми тенэодатчикгьми.The invention relates to a measurement technique, namely, to measuring deformations with foil gage sensors.

Известно устройство дл травлени фольговых тенэореэисторов, ссдерйащеё ванну с травильным раствором, в которой осуществл етс свободное травпвние заготовок тенэорезисторЬ Jl Недостатком этого устройства. fiJBJia етс неравномерное травление от-Де -Ь ных резисторов, вследствие рактеристики резисторов одной партий имеют существенный разброс. ... .A device is known for etching foil tenore eeors, with a pickling bath with a pickle bath, in which the free traversing of blanks of the shrink resistor Jl is a disadvantage of this device. fiJBJia uneven etching of resistors, due to the characteristics of resistors of one batch have a significant variation. ...

Известно также устройство дл травлени фольговых тензорезйсторов, содержащее вращающийс барабан с приводом и узлами креплени заготовок тензо1 езисторов и ванну, заполн емую травйльным pacTfrotiibM, расположенную ниже оси BpatuBHHa .©ара-бана 2.It is also known a device for etching foil strain gauges containing a rotating drum with a drive and attachment points for blanks of strain gauges and a bath filled with a trawling pacTfrotiibM, located below the axis of BpatuBHHa. © ara-ban 2.

Недостаток указанного устройства заклк чаётс -в том, что, как и в других устройствах, раэброс српротивлений тензореэисторов в одноРй партии остаетс существенным.The disadvantage of this device is the fact that, as in other devices, the response of the strain gauges in one batch remains significant.

Целью насто щего изобретени вл етс уменьшение разброса сопротивлений тензорезйсторов в одной партии.The purpose of the present invention is to reduce the spread of resistances of the strain gauges in one batch.

Это достигаетс тем, что устройство снабжено травильным валиком, осьThis is achieved by the fact that the device is provided with an pickling roller, the axis

которого параллельна оси барабана, а поверхность покрыта носителем травильного раствора, например нз тканого материала, имеет контакт с барабаном по его образующей и частично погружаетс в раствор, и приводом валика ; обеспечивающим его вращение в направлении, противоположном направлению вращени барабана.which is parallel to the axis of the drum, and the surface is covered with a carrier of the pickling solution, for example, ns woven material, has contact with the drum along its formation and is partially immersed in the solution, and a roller driven; ensuring its rotation in the direction opposite to the direction of rotation of the drum.

JQ Такое устройство обеспечивает nposs дение процесса травлени в услови х трени заготовки и носител травильного раствора, что приводит к более равномерному травлению и уменьшениюJQ Such a device provides nposs of the process of etching in the conditions of friction of the workpiece and the carrier of the etching solution, which leads to a more uniform etching and decrease

15 разброса сопротивлений тензорезнсторов в одной партии.15 scatter resistances of strain gauges in one batch.

На чертеже показана схема устройства .The drawing shows a diagram of the device.

Устройство содержнт вращаю1цийс барабан 1 с приводом 2 и узлами 3 креплени заготовок тензорезйсторов и ванну 4, заполн емую травильным раствором , расположенную ниже оси вращени барабаиа 1. Травильный валик 5, осьThe device contains rotary drum 1 with a drive 2 and nodes 3 fastening the workpiece of the strain gauges and the bath 4 filled with pickling solution, located below the axis of rotation of the drum 1. Etching roller 5, axis

Claims

25 of which is parallel to the axis of Barbadia I, and the surface is covered with a carrier of a grass solution, for example from woven cloth, has contact with drum 1 along its line and is loaded into solution. The roller has a DRIVE 7, allowing it to rotate in the direction opposite to the direction of rotation of the drum. The clamping units 3 of the strain resistors are made in the form of clamps holding the blanks to the cylindrical surface of the drum 1. Due to the movement of the bar surface, bar 1): in the opposite direction from the surface of the pickling shaft, PUC7BOP leaks out of the carrier and etching is carried out along the line of drum 1 and roller 5. As the etching tipoUecc proceeds under conditions of mechanical rubbing, the speed of the process increases by 4-6 times and the etching products are effectively removed from the etching zone. The uniformity of the process provides with identity. etching conditions for each point of the drum surface. In addition, in the case of termination of a process at a certain part of the workpiece, the rate of lateral undercutting of the mask that remains under the mask and corrugated is reduced, since this process proceeds without friction. At the same time, the variance of cop1:) in the batch of strain gauges in the batch is reduced from 20-30% to 5-10%. Claims An apparatus for etching foil strain gauges comprising a rotating drum with a drive and attachment points for workpieces of strain gauges and a bath filled with etching solution located below the axis of rotation of the drum; roller, whose axis is parallel to the axis of the drum, and the surface of the roller is covered with a carrier of the pickling solution, for example made of woven material, has contact with the drum along and forming a second partially submerged in the solution, and the drive roller, ensuring its rotation in a direction opposite to the direction of rotation of the drum. Sources of information taken into account in the examination: l.ABTOpcoke certificate of the USSR I 143586, cl. §01 B 7/20,1960.

2. ANKUDINOV, B.T., Mamaev, KN, Malobaznye strain gauges of resistance, M. Maashnostroenie, 1968, p. 46.