The method of controlling the displacement of the contact point relative to the nominal position on the raceway rings, double-row and single-row angular contact ball bearings and a device for implementing the method

 

(57) Abstract:

The invention relates to the production of angular contact ball bearings and is used to control the displacement of the contact point relative to the nominal position on the raceway rings of single - and double-row angular contact ball bearings. How is that measured in arbitrary axial cross-section of ring deflection in the outer diameter DWand internal dWthe groove of the raceway. Measured along straight, components with perpendiculars to the axis of the rings-rated angleocontact in the bearing, the deviation pick size from the nominal values. The results of the measurement ring is converted into a parameter characterizing the deviation of the contact angle in the bearing according to the formula C = Cn-Cinwhere Cn= -Knctgo+0.5 DW/sinofor outer ring; Cin= -Kinctgo+0.5 dW/sino- for the inner ring. If the parameter does not exceed the permissible value, determine the diameter of the balls of the bearing Assembly from the measured ring according to the formulaW= (Kn+Kin)+showheresho- nominal diameter of the balls in the bearing. The device consists of the device of the inu for location of measured rings, mounted on the frame by two measuring heads for measuring pick ring size, the first block summing the electrical signals of the measuring heads measuring the diameter of the trench, the second block summing the electrical signals of the measuring heads measuring pick the size, the block algebraic summation and two readout indicator. The first indicator connected to the input of the second summation block, the second output unit zoom electrical signals. The technical result of the invention to provide results that allow us to determine the ability of the bearing Assembly, and simplification of the method of measurement. 2 S. p. f-crystals, 5 Il.

The invention relates to the production of angular contact ball bearings, in particular to control the size of the raceways of rings before assembling bearings to ensure within the tolerance of the contact angle and the axial clearance in the bearings.

The contact angle in angular contact ball bearings without measurement at the stage Assembly can be provided within tolerance during Assembly of the bearing ring, in which deviations of the sizes of raceways not exceed a certain amount the of the raceways. But as GOST, TU, and from the consumers, there are no requirements on the allowable deviation of the contact angle due to the complexity of verification, especially in double-row angular contact bearings, angular contact bearings are going by the manufacturers of all of the rings in a random combination and have deviations of the contact angle from the nominal 12o.

But angular contact ball deviation of the contact angle of more than 10ohave more than two times less durability.

A device (A. C. the USSR 593018, M CL F 16 C 43/04, bull. 6, 1978 ) to measure at the points of contact with the balls of a diameter and axial position of the raceways of the rings angular contact bearing cone with the angle between the axis and forming equal to the nominal contact angle of the bearing, measuring balls located around the circumference of the cone and the raceway controlled bearing ring, and a contact movable along the axis of the cone sleeve, two reading device and associated two levers, equal armed and neravnopolochny, one of which is associated with the measuring sleeve and the other is movable in the axial direction of the shaft, contact with the end face of the monitored bearing rings.

A known method of controlling the dimensions of the working surface of the ring double row angular contact ball bearings (prototype, patent RU 2085842, M CL G 01 B 21/20, F 16 C 43/04, bull. 21, 1997), namely, that measure the radius of curvature of the surface of the trench, and then measured in arbitrary axial section of the ring diameter d of the trench and the sum of the distances (pick size) R from the axis of the ring to form a trench, which is measured along the lines placed under the contact angle of the bearing, calculate the deviation of the diameter d and the sum of the distances (pick size) P from the nominal values, compute the f parameter characterizing the offset of the line of contact in the groove of the raceways with the balls, according to the formula

f = P-dcos

and compare it to the allowable values.

The disadvantage of this method is the impossibility of a clear evaluation of the results of the measurement capabilities of the Assembly from the measured ring angular contact ball bearing with contact angle within the tolerance due to the fact that the calculated value of the parameter f can exceed the actual is irenie radius of curvature of the surface trough, the diameter of the trough of the raceways, the sum of the distances completed size R from the axis of the ring and forming a trench along the line of contact angle and calculating deviations of these values from the nominal values.

The accuracy of the obtained parameter in the prototype

In the outer ring

The deviation from the nominal value of the sum of the distances of Pnfrom the axis of the ring to a forming trough

Pn= DWcos+2R(1-cos)-LWsin,

and as

LW= Lto+2Rsin, (1)

the displacement of the lines of contact in the ring taking into account expressions (1)

< / BR>
where DW- the diameter of the trench raceway,

R is the radius of curvature of the surface trough,

LW- the distance between the troughs,

Lto- the distance between the lines of contact.

Measurement error bias line contact

< / BR>
In the inner ring

The deviation from the nominal value of the sum of the distances Rinfrom the axis of the ring to a forming trough

Pin= dWcos-2r(1-cos)-2lWsin,

and as

lW= lto-rsin (4)

the offset of the line of contact in the ring taking into account the expression (4)

< / BR>
where dW- the diameter of the trench raceway,

r is the radius of curvature of the surface trough,

sloanie between the line contact and the base end.

Measurement error bias line contact

< / BR>
From expressions (3) and (6) it follows that at =36oand permitted under engineering drawing variance of size Lto= lto=0.02 mm, R = r=0.04 mm error of the parameter f may have a value of:

when the dimension of the outer ring Lto=0,044 mm,

when the dimension of the inner ring lto=0.055 mm,

and when R = r = 0

when the dimension of the outer ring Lto=0,032 mm,

when the dimension of the inner ring P1to=0,043 mm

An object of the invention is to obtain when measuring parameters of the raceway rings, double-row and single-row angular contact ball bearings of the measurement result, which will show the Assembly of the angular contact ball bearing with contact angle is within the range of measured rings, in which deviations of the sizes of raceways exceed the allowable according to the design drawing, and simplification of the method of measurement.

To achieve the technical result in the method of measuring the dimensions of the raceway rings, double-row and single-row angular contact ball bearings measured in arbitrary axial cross-section of the rings deviation of diameter in nandakumaran to the axis of the ring nominal contact angleoin the bearing, the deviation pick size from the nominal values, the results of the measurement ring is converted into a parameter characterizing the deviation of the contact angle of the bearing, according to the formula

C = Cn-Cin,

where Cn= 0.5 DW/sino-Knctgofor outer ring;

Cin= 0.5 dW/sino+Kinctgofor the inner ring

and if the parameter does not exceed the permissible value, determine the diameter of the balls of the bearing Assembly from the measured ring according to the formula

W=sho+(Kn+Kin), (7)

wheresho- nominal diameter of the balls.

A device for implementing the method of measuring the dimensions of the raceway rings, double-row and single-row angular contact ball bearings, consisting of a device for measuring the outer rings and device for measuring the inner rings, each of which comprises a frame for location of measured rings, mounted on the frame by two measuring heads for measuring the diameter of the groove and with the possibility of measuring the pick ring size, in which the measured parameter is converted into an electrical signal, two summing block, the scale of the s indicator, the output of the measuring heads measuring the diameter of the gutter, connected respectively to the inputs of the first summing unit and measuring pick the size, connected respectively to the inputs of the second adder block, the outputs of the summing blocks are connected to the inputs of a large-scale unit with an output of which is connected to a readout indicator and the other readout indicator connected to the output of the second summing unit.

The technical result of the invention:

- the result of a measurement that characterizes the deviation of the angle of contact of the balls with the raceways of the measured inner and outer rings, is achieved by the proposed transformation results of the measurements of the rings, which is obtained when measuring ring characterizes the displacement of the contact point on the raceway relative to the nominal position;

- simplification of the method of measurement is achieved by measuring in the rings of the deviations from the nominal values of the diameter of the trench raceway and fitting size.

The proposed method and a device for implementing the method are illustrated by the drawings. In Fig. 1 shows a diagram of a device for measuring the double row outer ring happy.3 - diagram of the device for measuring the internal single-ring; Fig.4 - dimensional circuit of the measured deviations in the inner ring of Fig.5 - calculated scheme of the double-row angular contact bearing.

The device for implementing the method consists of a device for measuring the outer ring 1 (see Fig.1) and device for measuring the inner rings 2 (see Fig. 2), each of which comprises a frame (not shown) for securing the measured ring, mounted on the frame by two measuring heads 3 and 4 with the ability to measure the diameter of the gutter and with the possibility of measuring the pick ring size, in which the measured parameter is converted into an electrical signal, the first summing block 5, the second summing unit 6, a large-scale unit 7 with two inputs, the reference indicator 8 the magnitude and sign of the deviation of fitting size and a readout indicator 9 the magnitude and sign of the parameternorin.

The output of the measuring head 3 is connected respectively to the inputs of a summing unit 5, the output of which is connected to reinvestiruet input scale unit 7. The output of the measuring head 4 is connected respectively to the inputs of a summing unit 6, which has a km of sign-scale unit 7, which has a coefficient of transmission of an electrical signal by not inverting input of 0.5/sinoon the other entry in the device for measuring the outer rings minus ctgoand device for measuring the inner rings plus ctgoReading the indicator 8 is connected to the output unit 6, a readout indicator 9 - output unit 7.

The way of measuring double row outer ring (see Fig.1 and 2) is that the ring 1 base end and an outer cylindrical surface on the fixed stops and, as in the double row outer ring simultaneously grind both raceways for receiving raznozazornost their diameters and radii of curvature of the surface of the grooves is not more than 0.005 mm, the measured simultaneously in both series rings deviation of diameter DWpass raceways measuring heads 3 (a and B), the deviation picking the size of the measuring heads 4 (D and E) along (see Fig.2) direct O1TO3composing with the perpendicular O1N2to the axis of the ring angleo. The signals of the measuring heads 3 summarize in block 5, the signals of the measuring heads 4 summarize in section 6 with a transmission coefficient that is proportional to 0.5, the signals from blocks 5 and 6 are algebraically summed by oefficients transmission, proportional to minus ctgo. Take readings of the sign and magnitude of the measured deviations pick size TOnwith a reading of the indicator 8, connected to the output unit 6, the parameternwith indicator 9 connected to the output unit 7.

In Fig.1 and 2 are marked in the outer ring:

o- nominal contact angle of the balls with the raceways of the rings in the bearing;

R, R is the radius and the deviation of the radius of curvature of the surface of the trench;

DJoDWDW- rated, possible diameter and the diameter variation of the trench raceway;

LJo, LW, LW- rated, best distance and the deviation of the distance between gutters;

DcoDto, D - rated, possible diameter and the diameter variation of the line of contact in the gutter with balls at a nominal angle of contact;

Lco, Lto, Lto- rated, best distance and the deviation of the distance between the lines of contact;

TOn- deviation picking size.

In Fig. 2 shows the ring profile of the trench raceway with nominal dimensions of the solid line and the deviations of dimensions with a dashed line. Point K1and K2

In Fig. 2 shows that the measured device And the rate of 0.5 DWequal to the distance between the points N1N2and device G, the size TOnequal to the distance between points K1TO3received parameternequal to the distance between the lines ABOUT1K1and O2TO2.

Of triangles K1K3K5and K2TO4TO5it follows that:

< / BR>
As

< / BR>
then

Kn= (Dtocoso-Ltosino)0,5 (8)

As

DW= Dto+2R(1-coso), (9)

the signal at the output of block 5 will be determined by the expression

0.5 DW+0.5 DW= DW= Dto+2R(1-coso)

the signal at the output of block 6 will be determined by the expression

(Kn+Kn)0,5 = Kn= (Dtocoso-Ltosino)0,5

and the output unit 7 is a signal defined by the expression

< / BR>
to characterize the displacement of the contact points relative to the nominal position.

Method for measuring single-row outer ring of angular contact ball bearings, which is half the height of the row, is that the base ring base end face and the outer cylindricity measuring head (see Fig.1) 3 (a and B), the deviation of the fitting size TOnmeasuring heads 4 (D and E) along (see Fig. 2) direct O1K3composing with perpendiculars O1N2to the axis of the ring angleso. The signals of the measuring heads 3 summarize in block 5; the signals of the measuring heads 4 summarize in section 6 with a transmission coefficient that is proportional to 0.5; the signals from blocks 5 and 6 are algebraically summed in block 7, and the signal from block 5 - transfer coefficient, proportional 0.5/sinoand the signal from block 6 - transfer coefficient, proportional to minus ctgo. Take readings of the sign and magnitude of the measured deviations pick size TOnwith a reading of the indicator 8, connected to the output unit 6, the parameternwith a reading of the indicator 9, connected to the output unit 7.

Of triangles K1K3TO5and K2TO4TO5it follows that the deviation picking the size of the single-row outer ring will be determined by the expression

Kn= 0.5 Dtocoso-ltosino, (11)

where lto- deviation of the distance between the base end and the line of contact on the raceway.

The output of block 5 will signal the>Kn)0,5 = Kn= 0.5 Dtocoso-ltosino< / BR>
The output of block 7 is a signal defined by the expression

< / BR>
to characterize the displacement of the contact point relative to the nominal position.

The method of measuring the internal single-row ring (see Fig.3 and 4) is that the ring 2 base base end face and outer cylindrical surfaces of the flanges on the fixed stops and measured in ring diameter variation of dWtrench raceway measuring heads 3 (a and B), the deviation of the fitting size TOinmeasuring heads 4 (D and E) along (see Fig. 4) direct O1K3composing with perpendiculars O1N2to the axis of the ring angleo. The signals of the measuring heads 3 summarize in block 5, the signals of the measuring heads 4 summarize in section 6 with a transmission coefficient that is proportional to 0.5, the signals from units 5 and 6 summarize in block 7, and the signal from the unit 5, the transfer coefficient, proportional 0.5/sinoand the signal from the block 6 with the transmission coefficient, proportional ctgo.

Take readings of the sign and magnitude of the measured deviations pick size TOinwith a reading of indicatea 7.

In Fig.3 and 4 are marked in the inner ring:

r, r is the radius and the deviation of the radius of curvature of the surface of the trench;

dJodW,d- rated, possible diameter and the diameter variation of the trench raceway;

1Jo, 1W, 1W- rated, best distance and the deviation of the distance between the trough and the base end face of the ring;

dcodtodto- rated, possible diameter and the diameter variation of the line of contact in the gutter with balls at a nominal angle of contact;

lco, lto, lto- rated, best distance and the deviation of the distance between the line contact and the base end;

TOin- deviation picking size.

In Fig.4 shows the ring profile of the trench raceway with nominal dimensions of the solid line and the deviations of dimensions with a dashed line. Point K1and K2the gutters are the points of contact at a nominal angle of contact opoint O1and O2are the centers of curvature of the surface trough.

In Fig. 4 shows that the measured device And the rate of 0.5 dWequal to the distance between the points N1N2and device G, the size To1
K1and O2K2.

Of triangles K1K3K5and K2TO4K5it follows that

< / BR>
Since K1K4= 0,5(dco-dto) = - 0.5 dto; K2K4= lto-lco= lto,

then Kin= ltosino- 0.5 dtocoso. (13)

Since dW= dto-2r(1-coso), (14)

the signal at the output of block 5 will be determined by the expression

0.5 dW+0.5 dW= dW= dto-2r(1-coso)

the signal at the output of block 6 will be determined by the expression

(Kin+Kin)0,5 = Kin= ltosino- 0.5 dtocoso< / BR>
and the output unit 7 is a signal defined by the expression

< / BR>
to characterize the displacement of the contact point relative to the nominal position.

Parameter taking into account expressions (10) and (15) will be determined by the expression

< / BR>
In Fig. 5 shows the calculation scheme of the double-row angular contact ball bearing.

Around points of K1and K2who are the points of contact of the ball with the raceways of the rings, and points O1and O2which are the centres of curvature with radii R and r of the surface grooves, shows etc the sizes of Lto/2, Dto/2, 1toand dto/2 and proportional to their changes and changes of radii R and r the set of possible changes of coordinates of the centers of curvature.

A straight line connecting points of K1and K2and passing through the point O2and O1has an inclination angle equal to the nominal contact angleoin the bearing, and has a length between points K1and K2equal to the nominal diametershoball.

Maximum contact angleminin the bearing will be at the sizes in the rings that correspond to the coordinates of the points TO3and K4the coordinates are proportional to correspond to the position coordinates of the centers of curvature of the surfaces of the grooves radii R and r points ABOUT3and O4.

Minimum contact angleminin the bearing will be at the sizes in the rings that correspond to the coordinates of the points K5and K6the coordinates are proportional to correspond to the position coordinates of the centers of curvature of the surfaces of the grooves with radii R and r points O5and O6.

Parameterncalculated by expression (10), characterized by the distance between lines passing through the point Kmincalculated according to the expression (15), characterized by the distance between lines passing through the point K1and K2and, in particular, through point-TO4and O4or point TO a6and O6.

From the triangle O1AO2it follows that

O1A=0.5(LW-21W+S); SC2-(R+r)-0,5(DW-dW).

Since LW=Lto+2Rsino; 1W=1to-r sinothen taking into account expressions (9) and (14) the contact angle will be determined by the expression

< / BR>
In the hub-double row angular contact ball bearings, 256907 AS should be according to the design drawing sizes of raceway rings, mm

R=5,25+0,08; Dto=58,60,02; Lto=11,150,02

r=5,2+0,08; dto=42,420,02; lto=11,50,02

axial clearance S=0,1020,012 mm,

the contact angle 31-41o.

Nominal contact angle in the bearing (see Fig.5)

< / BR>
sino=0,5875; coso=0,8092; tgo=0,726

or by expression (17)

< / BR>
The nominal diameter of the balls (see Fig.5)

< / BR>
Maximum contact angle is at variance sizes in the rings according to the design drawing

Dto=+0,02; Lto=+0,02; R=0

dto=-0,02; lto=-0,02; r=0

the expression (18)

< / BR>
/P> Minimum contact angle is at variance sizes in the rings according to the design drawing

D=-0,02 mm; LK=-0,02 mm; R=0

d=+0.02 mm; LK=+0.02 mm; r=0

< / BR>
the maximum permissible value of the parameter is

With=0,5(-0,02-0,02)0,5875-(0,02+0,01)0,8092=-0,036 mm

Thus, for bearing 256907 IS the maximum value of parameter=0.036 mm would correspond to a deviation of the contact angle of no more than 5o.

Before the beginning of measurements of the rings set of readings at the beginning of the indicator 8 and then indicator 9 to zero in the measurement model part having nominal dimensions of the radius of curvature of the troughs, the diameter of the trench raceway, the distance in the double row outer ring between the sections, the outer row between the base end and the cross-section in the inner row ring between the base end and the cross-section, which correspond to the nominal angle of contact of the balls with the raceways of the rings in the bearing. An exemplary item is removed from devices.

Designed for the Assembly of the bearing 256907 AS double row outer ring, which is the deviation of the size

Dto=-0,028 mm; Lto=-0,046 mm; R=0,

set in the device and the

TOn=[-0,0280,8092-(-0,046)0,5875]0,5=+0,002 mm

indicator 9 will show the value ofnby the formula (10)

WITHn=(-0,0280,5875-0,0460,8092)0,5=-0,027 mm

Designed for the Assembly of the first inner bearing ring, which is the deviation of the size

dto=+0.042 mm; lto=+0.015 mm; r=0,

set in the device and measure.

The indicator 8 will show the amount of deviation pick size according to the formula (13)

TOin=0,0150,5875-0,50,0420,8092=-0,008 mm,

indicator 9 will show the value ofinby the formula (15)

WITHin=0,0150,8092+0,50,0420,5875=+0,024 mm

The parameter is calculated from the values of the indicators 9 by the formula (16)

C = Cn-Cin=-0,027-0,024=-0,051 mm

Since the obtained parameter |C|>0.036 mm, the contact angle of the bearing with these rings will be invalid:

< / BR>
Following the innermost ring is the deviation of the size

dto=-0,032 mm; lto=-0,036 mm; r=0,

which is installed in the device and measure.

The indicator 8 will show the deviation pick the size

TOin=-0,0360,5875-0,5(-0,032)0,8092=-0,008 mm

which coincides with the measured value of the first inner ring

indicator 9 pok the indicators 9

With=-0,027-(-0,038)=+0,011 mm

The "plus" option means that the contact angle is greater than 36oand, since |C|<0.036 mm, for Assembly of the bearing compute the diameter of the balls of the indicators 8 by the formula (8)

W=+0,002+(-0,008)+9,998=9,992 mm

The contact angle bearing

< / BR>
corresponds to the permissible value according to the design drawing.

1. The method of controlling the displacement of the contact point relative to the nominal position on the raceway rings, double-row and single-row angular contact ball bearings, consisting in measuring the parameters characterizing the contact surface raceways of inner and outer rings, balls, characterized in that measured in arbitrary axial cross-section of ring deflection in the outer diameter DWand in the internal dWthe conduit raceways and measured along straight, components with perpendiculars to the axis of the ring nominal contact angleoin the bearing, the deviation pick size from the nominal values, the results of the measurement ring is converted into a parameter characterizing the deviation of the angle of contact of the balls with the raceways of the measured inner and outer rings by the formula;

Cin= 0.5 dW/sino+Kinctgo- for the inner ring,

and if the parameter does not exceed the allowable values, determine the diameter of the balls of the bearing Assembly from the measured ring according to the formula

W=sho+(Kn+Kin)

wheresho- nominal diameter of the balls in the bearing.

2. A device for implementing the method according to p. 1, consisting of a device for measuring the outer rings and device for measuring the inner rings, each of which comprises a frame for location of measured rings, mounted on the frame by two measuring heads for measuring the diameter of the groove and with the possibility of measuring the pick ring size, in which the measured parameter is converted into an electrical signal, first and second summing units, large-scale block and two readout indicator, the output of the measuring heads measuring the diameter of the gutter, connected respectively to the inputs of the first summing unit, and the output of the measuring heads measuring pick size connected respectively to the inputs of the second adder unit, wherein the second summing block has a coefficient of transmission of electrical power is on to the outputs of the first and second summing units, and has a coefficient of transmission of an electrical signal on the first input 0.5/sinoon the second entry in the device for measuring the outer ring minus ctgoand device for measuring the inner ring plus ctgoreading the indicators connected with the first output of the second summing unit and the second output of the scale block.

 

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EFFECT: enhanced precision.

FIELD: electro-optical engineering.

SUBSTANCE: electro-optical device for controlling profile of blade runner has motionless horizontal base, two vertical posts disposed onto base at opposite sides of runner to be controlled, first carriage disposed onto motionless base for movement between vertical posts in parallel to X axis and provided with first linear movement detector and first drive. Device also has second and third carriage mounted onto vertical posts for movement in parallel to Z axis and provided with second third linear movement transducers correspondingly, contrivance for mounting blade disposed onto first carriage which provides strict positioning of blade runner in vertical plane. First and second electro-optical heads are disposed onto second and third carriages and formed each of narrow light beam sources of multi-element photoreceiver, which is provided with sweep-out and code forming unit. Device also has objective. Objectives of electro-optical heads are mounted for triangle optical communication of photoreceivers with narrow light beam sources through corresponding surfaces of runner of blade to be controlled. Device also has second drive and computer. Inputs of computer are connected with outputs of linear movement detectors and of multi-element photoreceivers; outputs of computer are connected with drive of device. Device has joist which connects vertical posts; it forms the first portal and second portal which has vertical posts disposed at opposite sides of blade to be controlled. One post of second portal is attached to second carriage. Light radiation source and receiver, conjugated optically, are provided with corresponding objectives and are fixed at different posts of second portal. Flexible cinematic coupling connects second and third carriages. Second drive is disposed onto joist of first portal and it is provided with driving roller which communicates with flexible cinematic coupling. Output of light radiation receiver is connected with input of computer. False parts of contour of runner are eliminated out of memory of computer.

EFFECT: improved truth of results of control; reduced number of drives.

2 cl, 3 dwg

FIELD: construction.

SUBSTANCE: method of design of three-dimensional profiles of the object, including generation of sounding pulses of laser radiation for step scanning of the object in the plane transverse to the direction of the radiator movement, with consecutive processing of the reflected from the object signal to design profiles of objects, differs from the other methods by the fact, that before reflected signal gets processed a laser beam is generated in a discontinuous mode, generated beam is broadened, transformed into light beam of annular cross-section; generation of sounding pulses of laser radiation for step scanning of the object is conducted by successive alternative fragments cutting out from the cross-section of the received light beam of annular cross-section.

EFFECT: improving accuracy of measurement and article technological efficiency.

5 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: profile of roller surface is geometrically limited with first zone corresponding to relief facet of roller, with second zone corresponding to interface of cylinder part with relief facet of roller and with third zone corresponding to cylinder part of roller. The procedure consists in measuring profile of roller surface. On base of calculated results of the first derivative of measured profile, segments of straight line, modelling the first derivative of measured profile, are calculated for each of geometric zones of the roller. Radii of curvature of roller surface profile are calculated by means of determination of the first derivative of straight line segments. Calculated radii of curvature are compared with preliminary determined threshold values to control continuity of the said radii.

EFFECT: facilitating control of interface of cylinder and relief parts of roller of rolling bearing.

2 dwg, 4 cl

FIELD: physics.

SUBSTANCE: apparatus, method and system for measuring thread parameters at the end of a tube or a threaded pipe, comprising: an optical sensor which measures a first thread parameter by detecting light from a light source lying on the opposite side of the axis of the tube or pipe, and essentially passes parallel the thread groove; a contact sensor which measures a second thread parameter through contact of contact probe with the thread lateral surface and detection of spatial coordinates of the contact probe during contact; and processor which calculates thread parameters from the combination of the first thread parameter and the second thread parameter. High-precision measurements can be taken even for a thread parameter associated with hook lateral surfaces, which is susceptible to considerable measurement errors when measuring only optically since they are almost completely hidden in the shadow of the thread crest. Using the disclosed system of measuring thread parameters, the height at which a threaded tube is placed can be adjusted using a height adjustment mechanism so that the reference measurement axis of the thread parameter measuring device can be level with the central axis of the threaded tube.

EFFECT: high accuracy of measuring thread parameters associated with thread lateral surfaces.

9 cl, 12 dwg

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