SU1609637A1 - Arrangement for adjusting power nut drivers - Google Patents

Abstract

This invention relates to a test tooling. The purpose of the invention is the expansion of technological capabilities by adjusting the range of torque measurement. First, the device is set up to adjust the wrenches; for this, a certain torque is applied to the sleeve 8, under the action of which it turns in the housing and the shoulder of the L-shaped lever 13 bends the elastic element 11 with the strain gages pasted on it and one of the additional elastic elements 16. When the elastic element 11 is bent, a mismatch of the measuring bridge of the resistance strain gages occurs, the signal from the latter is amplified in the measuring unit and supplied to a voltmeter, which is recorded on its scale. Applying various torques, build a calibration chart. The tested wrench head turnkey installed in the profile hole 9 of the sleeve 8 and include the drive. At the same time, the voltmeter will show the value of the received electrical signal, which according to the calibration graph is converted into the magnitude of the torque generated by the wrench. 1 hp f-ly, 5 ill.

Description

The invention relates to instrumentation tooling and can be used in various fields of industry when calibrating the tightening of threaded soy;

The purpose of the invention is the expansion of technological capabilities by adjusting the torque measuring range.

Figure 1 shows the proposed device for setting wrenches, a general view; in fig. 2 is a view A of FIG. one; on fig.Z - section bb in figure 2 | ka fyo4 - view b on fyozg in fig 5 is a circuit diagram of a device for setting up a wrench.

The device for adjusting the wrench contains a base mounted on it the measuring unit 2 and electrically connected with it by the conductor 3 the block 4 loading the block 4 on the loading includes the case 5 with covers 6 and 7 placed in the case 1 rotatably 8 with the central profile hole 9. designed to interact with a turnkey head of a customizable wrench (not shown). In case 1, an upright 10 is fixed perpendicularly to its axis, an elastic element 11 is fixed on the latter with one end, with strain gages 12 electrically connected to it, electrically connected to the measuring bridge. At the end of the sleeve 8 is fixed with one shoulder an L-shaped lever 13, the second shoulder of which is rigidly connected with the free end of the elastic element 11. In the housing 1, perpendicular to its axis, two axes 14 are fixed with nuts 15, which inclined at an angle of 45 to the axis of the elastic element 11, and the axis of the studs 14

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five

0

five

0

five

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perpendicular to each other. At the end of each of the studs 14, additional elastic elements .16 are fastened, each of which is designed to interact with the shoulder of the L-shaped lever 13 rigidly connected with the elastic element 11. Connector 17. is fixed in the housing 1 and electrically connected to the strain gages --12. The G-shaped lever 13 is fixed to the end of the sleeve with 8 screws 18. A voltmeter 19 handle 20 settings zero and a warning lamp 21 are attached to the front panel of the measuring unit 2. The calibration chart 22 for converting the readings of the voltmeter 19 into sizes is fixed on the side panel of the measuring unit 2. torsional moment.

The basic electrical circuit of the device for setting up wrenches includes resistance strain gages 12 connected to a measuring bridge and electrically connected via resistors 23-25 designed to set the required gain factor value with an analog microcircuit 26 (for example, an operational amplifier ) and a voltmeter 19, a power supply unit 27 of the strain gauges 12, a power supply unit 28 of the analog microcircuit 26, an irregular transformer, 29, a pre-storage of 30 and 31, a warning light 21 for visual assessment of the presence of voltage in the network and 32 ku measuring unit 2. For installation incorporating zero sluzkit resistor 33.

The device for adjusting the wrenches works as follows.

Preliminary, the loading unit 4 is adjusted to a predetermined range of measured torques. For this, the nuts 15 on the studs 14 are loosened and the auxiliary elastic elements 16 fixed on them are alternately rotated to contact with the shoulder of the L-shaped lever 13 and then create the required equal bend of the additional elastic elements 16 in such a way that the main elastic. element 11 with strain gauges 12 was found to be incompatible with the bridge of the strain gauges 12. glued to the elastic element 11, fed to the input of the operational amplifier 26, amplified and visually fixed on the scale of the voltmeter 19 by the deviation of arrows.

By applying certain torques with a torque wrench

deformed state. After this, each value of the moment will be consistently produced by rigid fixing of the studs with 14 nuts 1.5.

Then, through the connector 17 (Figures 2-4), conductor 3 is electrically connected. The loading unit 4 is connected to measuring 1 unit 2 and the latter is connected to the network by pressing button 32. In this case, the voltage from the network goes to the primary winding of the power transformer 29 and then the secondary windings on blocks 27 and 28 of the power supply of the strain gauges 12 and the analog chip 26 correspond to their reading of the voltmeter, which is used for the calibration schedule. This completes the preparation of the device for operation,) 5 The setting of the tested thread-wrenching device (wrench) is performed in the following sequence.

A wrench spindle (not shown) 20 is installed in the profile hole 9 of the hub 8, turn on the wrench drive and take a reading from the scale - a voltmeter 19. Transfer the received value of the electrical signal (in 25 scale units) using the calibration curve 3 to the torque value moment, it is decided to adjust the power of the motor of the wrench (up or down). If necessary, the power is adjusted (possibly without turning off the device, for example by throttling for pneumatic wrenches), and Volume operation with the device ends. The wrench drive is disconnected, and the latter is removed from the load unit. Then, the next nutrunner is configured in the same way.

but that is visually controlled by

35

40

the signal lamp 21 is ignited. In the event of a significant deflection of the pointer of the voltmeter 19, it is first roughly adjusted to zero by unscrewing the nuts 15 and rotating the studs 14 changes the rigidity of the main 11 and additional 30 elastic elements. A fine adjustment is then made using a resistor 33 by rotating the knob 20, which is brought to the front panel of the measuring unit 2,

Then, in the profile hole 9 of the sleeve 8, a standard torque wrench (not shown) is installed and various forces are applied to its handle. At the same time, a calibration curve is made for torque - dividing the scale of the voltmeter, after which the torque wrench removes the q of the 4 loading block. Instead of a torque wrench, the lever and weights can also be used for calibration. In the process of calibration, the torque generated by the torque wrench is transmitted from the sleeve 8 through screws 18 and the L-shaped lever 13 to an elastic one. element 11 with strain gauges 12, the end of which is bent relative to the stand 10J, this causes an imbalance of the measuring bridge, the strain gauges 12. At the same time as the elastic element 11, one of the additional elastic elements 16 also bends (depending on the direction of rotation) 25

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The strain gauges 12. pasted on the elastic element 11 are fed from the bridge to the input of the operational amplifier 26, amplified and visually fixed on the scale of the voltmeter 19 according to the deviation of its arrow.

By applying certain torques with a torque wrench

about each moment value will be correspondingly 5

0

Confirm your voltmeter reading, which is used to build a calibration schedule. This completes the preparation of the device for operation,) 5 The setting of the tested thread-wrenching device (wrench) is performed in the following sequence.

A wrench spindle (not shown) 20 is installed in the profile hole 9 of the hub 8, turn on the wrench drive and take a reading from the scale - a voltmeter 19. Translate the received value of the electrical signal (in 5 scale units) using the calibration chart 3 to the cool value At this point, the decision is made to adjust the power of the motor wrench (up or down). If necessary, the power is adjusted (possibly without turning off the device, for example by throttling for air wrenches), and this is where the work with the device ends. The wrench drive is disconnected, and the latter is removed from the load unit. Then, the next nutrunner is configured in the same way.

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Formula

the invention

}. A device for adjusting a wrench - .ppv, comprising a base, a measuring unit mounted thereon and an electrically connected loading unit comprising a housing, a sleeve disposed therein with a possibility of rotation with a central profile opening,

0 designed to interact with a turnkey head of a customizable wrench, and an elastic element fixed in the housing with one end, with strain gauges pasted on it, is kinematically matched by the other end to the sleeve, characterized in that, in order to expand technological capabilities. Due to ctyneH control of the measuring ranges of the torque generated by the adjustable wrench, the elastic element is placed in the body perpendicular to its axis, the kinematic coupling of the elastic element with the sleeve is made in ide; L-shaped lever, one shoulder of which is fixed on the end of the sleeve, the other is rigidly connected with the elastic element, and the device is fitted with installed (perpendicular to its axis perpendicular to its axis with the possibility of axially fixed movement of two studs and two additional elastic elements of which, at one end, is fastened to the corresponding hairpin and is designed to interact with the shoulder of the L-shaped lever rigidly connected with the elastic element.

2, The device according to claim 1, characterized in that the studs are mounted in the housing at an angle of 45 ° to the axis of the elastic element, and the axis of the studs are perpendicular to each other.

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Claims (2)

Claim ί. A device for adjusting wrenches containing a base., A measuring unit installed on it and an electrically connected loading unit including a housing, a sleeve with a central profile hole that can be rotated therein, designed to interact with a turnkey wrench of a custom wrench, and fixed in case one end of the elastic element with a strain gauge glued on it, kinematically connected to the other end with a sleeve, characterized in that, in order to expand technological due to the step-by-step adjustment of the measuring ranges of the torque created by the adjustable wrench, the elastic element is placed in the housing perpendicular to its axis, the kinematic connection> of the elastic element with the sleeve is made in the form of a L-shaped lever, one shoulder of which is fixed to the end of the sleeve, the other is rigidly connected with an elastic element, and the device is equipped with mounted in the housing perpendicular to its axis with the possibility of axial fixed movement with two studs and two additional elastic mi elements, each of which at one end is fixed to the corresponding 5 to the hairpin and is intended for interaction with the shoulder of the L-shaped lever rigidly connected with the elastic element. 2. The device according to claim 1, wherein the studs are mounted in the housing at an angle of 45 ° to the axis of the elastic element, and the axis of the studs is perpendicular to one another. b b id c J 609637 * ----- (- H Fie 5