The control device sizes of raceway rings, double-row and single-row angular contact ball bearings

 

(57) Abstract:

The invention relates to the production of angular contact ball bearings, in particular for the determination of the diameters of the balls on the measurement results of the raceways of the outer and inner rings prior to Assembly of the bearing. Device for measuring deviations pick the size of the raceway from the nominal value of the ring angular contact ball bearings consists of a device for measuring the double row outer rings and device for measuring the inner row of rings. Device for measuring the double row outer rings contains fixed and coaxially located the movable tube and the measuring balls, separated by separator. Device for measuring the inner row of the rings contains a fixed sleeve, the annular ledge on the side where the measuring balls, separated by a separator, and measuring the movement of the base end of the measured ring. The technical result - improving the measurement accuracy of the raceways of the rings in the absence of rotation of the measured ring. 6 Il.

The invention relates to the production of angular contact ball bearings, in particular to the determination of the diameter is P CLASS="ptx2">

Known devices for measuring the cross section of the rings corresponding to the nominal contact angle of the bearing, the parameters of the raceways of the outer and inner ring double row angular contact bearings, with which the results of measurement to determine the diameter of the balls of the bearing Assembly from the measured rings.

A device (A. C. the USSR 615285, CL F 16 C 43/04, bull. 26, 1978 ) to measure the raceways of the rings double row angular contact ball bearings, which provides for measurement of the double row outer rings coaxially arranged fixed and movable along the axis of the truncated cones, measuring the displacement of the rolling cone, two shoulders lever contacting the first shoulder with a movable cone, a second arm, with the meter movement, and provides for measurement of the internal single-ring stationary truncated cone, measuring the movement of the base end of the measured ring, two shoulders lever contacting the first shoulder with the base end of the measured ring, a second arm, with the meter movement, the cones have the angle between the axis and the generatrix of the surface equal to the nominal contact angle of the assembled bearing, and a circle of cones and deficiente transfer move duplicator lever, proportional 0.5 sinoand when measuring internal single ring, proportional to sinothis device measures the deviation pick size from the nominal value:

in the double row outer ring:

KN= 0,5(Dctgo-L)sino(1)

in the inner row ring:

KB= (l-0,5 dctgo)sino(2)

where D, d is the deviation of the diameter of the raceway;

L, L - deviation of the distance between the raceways and, accordingly, the raceway and the base end;

0- the nominal contact angle, the points on which the raceways defined above deviations.

The disadvantage of this measuring device is the fact that to obtain reliable measurement results it is necessary to rotate the measured ring, which leads to the complexity of the design and performance measurement.

A device for controlling the dimensions of the working surface of the ring double row angular contact ball bearings according to EN 2085842, CL F 16 43/04, publ. 27.07.1997, which can be directly measured deviation pick size from the nominal value in the rings.

This measurement ostrenga single ring, each of which comprises a frame for location of measured rings and mounted on the frame by two measuring transducer movement with the possibility of measuring the deflection of picking the size of the raceway rings at the points of the nominal contact angle in the bearing.

A disadvantage of this device is the need to use every instrument at least two transducers displacement into an electrical signal and position them so that they measured the deflection fitting size in pixels of the nominal contact angle on the raceways of the rings and to the movement of the rolling element transducer was in the direction of the beam nominal contact angle, i.e., high complexity designs.

An object of the invention is to obtain reliable measurement results pick ring size angular contact ball bearings in the absence of rotation of the measured ring and a significant simplification of the design of measuring instruments.

The problem is solved in that the device for measuring the raceways of the rings, double-row and single-row angular contact ball bearing device for measuring the outside the cage and located in the annular ledge at the end of the tubes can move only along the axis of the tubes, and a meter for measuring the distance between the ends of the tubes, and a device for measuring the inner row of the rings contains a fixed sleeve, the annular ledge on the side where the measuring balls, separated by a separator, and measuring the movement of the base end of the measured ring, while measuring the balls have a diameter defined by the formula:

W2R-80|D|,

where R is the radius of curvature of the surface of the gutter measured raceway,

D is the maximum deviation of the diameter of the raceway in the section corresponding to the nominal contact angle.

The technical result of the invention is to improve the accuracy of measurement is achieved by the fact that the application of the measuring balls with a diameter defined by the attached formula, measured raceway with arbitrarily large deviation of the diameter in the cross section of the ring corresponding to the nominal contact angle of deviation of no more than 1o.

The invention is illustrated by drawings. In Fig.1 shows a diagram of a device for measuring the double row outer ring of Fig.2 - scheme of dimension chains in the measured double row outer rings of Fig.3 - scheme of the device for measuring the internal circuit of the device for measuring single-row outer ring, in Fig.6 - scheme of dimension chains in the measured external single rings.

Device for measuring the raceway ring double row angular contact ball bearings consists of a device for measuring the double row outer rings and of a device for measuring the inner row of rings (see Fig.1 and Fig.3) or a device for measuring the raceway rings for single row angular contact ball bearings consists of a device for measuring single-row outer rings and of a device for measuring the inner row of rings (see Fig.5 and Fig.3).

Device for measuring the double row outer ring 1 (see Fig.1) includes a fixed tube 2 and coaxially located with the stationary movable along the axis of the tube 3, the annular ledge on the end of which are measuring the balls 4, separated by a separator (not shown), which is made so that the measuring balls 4 can move only along the axis of the tubes for the input and output tubes measured in the ring, and the 5 meter distance between the ends of the tubes.

Method of measurement instrument double row outer ring (see Fig.1 and Fig. 2) is that the ring with nominal sizes (shown in Fig.2 solid linear movable tube 3 with the measuring 4 balls and put on the tube 3 is required axial load. Measuring balls will come into contact with the raceways of the measured ring in the section corresponding to the nominal contact angle, the probe 5, is fixed in a stationary tube 2 will come into contact with the end face of the movable tube 3. The meter 5 this adjusts to zero. Then the exemplary ring is removed and the apparatus is installed ring of unknown size variance (shown in Fig.2 in broken lines) of the raceways and changing the position of the tube 2 along the axis will measure meter 5.

In Fig.2 are marked in the outer ring:

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

and- contact angle measuring balls raceway measured ring;

W- diameter balls;

D0D - rated and possible diameter raceway in cross section corresponding to the nominal contact angle (diameter line contact);

L0L - par and the possible distance between the lines of contact;

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

Pnthe amount of movement along the axis of the end face of the tube.

In Fig.2 shows that the measuring balls todoroki rolling the measured ring points TO a3and K4when the angle of contactandsignificantly different from the nominal one.

In Fig.2 shows that

Po= Lo+2Rosino+W-2O1N1< / BR>
P = L+2(R+R)sino+W-2O1N2< / BR>
O1N1= O1C1sino= (R-0,5W)sino< / BR>
Pn= Po-P = 2[O1N2-(R+R-0,5W)sino]-L (3)

From the triangle O1N2C2it follows that

< / BR>
Of dimension chains, it follows that

< / BR>
as

O1C2= (R+R-0,5W); N1C1= (R-0,5W)coso;

< / BR>
the expression (3) takes the form:

< / BR>
The contact angle, which is the dimension of the raceway rings:

< / BR>
If the meter 5 will be proportional 0.5 sinoand will be made a condition for diameter measuring balls that

W2R-80|D|,

the meter 5 will show the amount of deviation picking the size of the measured ring:

Kn= 0,5 Pnsino(6)

Device for measuring the internal single-row ring 6 (see Fig.3) includes a fixed sleeve 7, the annular ledge on the side where the measuring balls 4, separated by a separator (not p"ptx2">

Method of measurement instrument internal single-row ring (see Fig.3 and Fig. 4) is that the ring 6 with nominal sizes (shown in Fig.4 solid line) base raceway on measuring the balls 4 in the stationary sleeve 7 with the required axial load, measuring balls 4 will come into contact with the raceway of the measured ring in the section corresponding to the nominal contact angle meter 8 will come into contact with the base end of the measured ring. The reading on the meter 8 thus set to zero. Then the exemplary ring is removed and the apparatus is installed ring of unknown size variance (shown in Fig.4 in broken lines) raceway, changing the position of the base end of which is compared with the exemplary meter will measure 8.

In Fig.4 marked in the inner ring:

d0d - rated and possible diameter raceway in cross section corresponding to the nominal contact angle (diameter line contact);

l0l - rated and possible distance between the base end face of the ring and the contact line;

lJo, lW- rated and possible distance between the base end and the center of curvature over/SUB> the amount of movement along the axis of the base end of the measured ring.

In Fig. 4 shows that the measuring balls in contact with the raceways exemplary ring at the point K1when the angle of contactoand with the raceway of the measured ring at the point K2when the angle of contact andsignificantly different from the nominal one.

In Fig.4 shows that

Pin=(lW+O1N2)-(lJo+O1N1)=(lW-lJo)+(O1N2-O1N1)

since lW= l-(r+r)sino; lJo= lo-rsino;

O1N1= O1C1sino= (r-0,5W)sino,

then

Pin= l-(r+r-0,5W)sino+O1N2(7)

From the triangle O1N2C2it follows that

< / BR>
as

O1C2= (r+r-0,5W); C1N1= (r-0,5W)coso;

< / BR>
the expression (7) takes the form:

< / BR>
The contact angle, which is the dimension of the raceway rings:

< / BR>
If the meter 8 will be proportional to sinoand will be made a condition for diameter measuring balls that

W2r-80|d|,

the 8 meter will show the value of acclamate single-row outer ring 9 (see Fig.5) contains movable along the axis of the tube 10, the annular ledge on the side where the measuring balls 4, separated by a separator (not shown), which is made so that the measuring balls can only move along the axis of the tube to allow input and output of the tube measured in the ring, and the probe 11 of the axial movement of the tube 10.

Method of measurement instrument single-row outer ring (see Fig.5 and Fig. 6) is that the ring with nominal sizes (shown in Fig. 6 solid line) base on a flat surface of the base end and the measured ring enter the tube 10 with the measuring 4 balls and put on the tube 10 is required axial load measuring balls come in contact with the raceway of the measured ring in the section corresponding to the nominal contact angle, the measuring device 11 mounted at the base of the device that come into contact with the end face of the tube. The reading on the meter 11 is thus set to zero. Then the exemplary ring is removed and the apparatus is installed ring of unknown size variance (shown in Fig.6 in broken lines) raceway, changing the position along the axis of the tube 10 will measure the meter 11.

On ia in cross section, corresponding to the nominal contact angle (diameter line contact);

lol - rated and possible distance between the base end face of the ring and the contact line;

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

Pnthe amount of movement along the axis of the tube 10.

In Fig. 6 shows that the measuring balls in contact with the raceway exemplary ring at the point K1when the angle of contact oand with the raceway of the measured ring at the point K2when the angle of contactnsignificantly different from the nominal one.

In Fig.6 shows that

Po= lo+Rsino+0,5W-O1N1< / BR>
P = l+(R+R)sino+0,5W-O2N2< / BR>
O1N1= O1C1sino= (R-0,5W)sino< / BR>
Pn= Po-P = O2N2-(R+R-0,5W)sino-l (11)

From the triangle O2N2C2it follows that

< / BR>
Of dimension chains, it follows that

< / BR>
As

O2C2= (R+R-0,5W); N1C1= (R-0,5W)coso;

< / BR>
the expression (11) takes the form:

< / BR>
If the meter 11 will be proportional to sinoand will be made a condition completepackage size measured single-row outer ring:

Kn= Pnsino(13)

Expressions (5) and (9) can be represented in the form of approximate values:

< / BR>
From the expression (14) we can obtain the expression for a more accurate determination of the diameter measuring bulbs:

W2R-57,3/sino|D/| (15)

According to the results of the readings of the probes 5 and 8 or 11 meters and 8 determine the diameter of the balls, with whom and with measured rings must be assembled angular contact ball bearing according to the formula:

W=sho+(Kn+Kin), (16)

wheresho- nominal diameter of the balls in the bearing ring having nominal dimensions of the raceways and the nominal axial clearance.

From expressions (1), (2) and (6), (10) or (13), (10) implies that the measurement error in the proposed device will be determined by the expressions:

< / BR>
< / BR>
When measuring rings, for example, ball bearing 256907 ES, which:

axial clearance = is 0.102 mm 0.012 mm;o= 36;sho= 9,998 mm

in the ring: R = 5.25 mm; D=-0,04 mm;

r=5.2 mm; d=+0.04 mm;

sin 36o=0,5878; cos 36o=0,809

measurement error is:

- when measuring ring device company MARPOSS, W= 9,99 mm

PCN=-0,019 mm(-0,016 mm)=-0,003 mm

PCIN=-0 is=arccos (0,809+0,0784)=27o< / BR>
The error in the determination of the diameter of the balls of the bearing Assembly from the measured rings:

PW=(-0,003 mm)+(-0,004 mm)=-0,007 mm

If will be assembled bearing 256907 ES of these rings and these balls, the bearing will be increased axial clearance at value

< / BR>
which twice exceeds the allowable tolerance.

- when measuring rings offer the device with the measuring balls diameter:

W25,2 mm-800,040 mm=7 mm

PCn=-0,016 mm(-0,016 mm=0 mm

PCin=-0,016 mm+0,016 mm=0mm

the contact angle when measuring

Yves=arccos (0,809+to 0.0117)=35o, in=arccos (0,809+0,0114)=35o< / BR>
Thus, the proposed measuring device has the ability to measure the raceway rings, double-row and single-row angular contact ball bearings with a measurement error of not more than 0.0003 mm without rotation of the measured ring and determine the diameter of the balls for the Assembly of the bearing measured from ring to provide axial clearance within the tolerance.

Device for measuring deviations pick the size of the raceway from the nominal value of the ring angular contact ball bearings, consisting of a device lacto device for measuring the double row outer rings contains fixed and coaxially located the movable tube and the measuring balls, separated by a separator and located in the annular ledge at the end of the tubes can move only along the axis of the tubes, and a meter for measuring the distance between the ends of the tubes, and a device for measuring the inner row of the rings contains a fixed sleeve, the annular ledge on the side where the measuring balls, separated by a separator, and measuring the movement of the base end of the measured ring, while measuring the balls have a diameter determined by the formula

W2R-80|D|,

where R is the radius of curvature of the surface of the gutter measured raceways;

D is the maximum deviation of the diameter of the raceway in the section corresponding to the nominal contact angle.

 

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FIELD: mechanical engineering.

SUBSTANCE: method includes assembling bearings using races with random permissible deviations of sizes of outer race ΔD, inner race Δd, distance between ways in the outer race ΔH, distance between the race way and base face Δh in the inner race, which are measured at the sites of nominal contact angle β0, and measuring the axial clearance S and radial clearance P in the assembled bearing. The radial space is measured in each ball row in the section passing through the nominal position of the ball centers. The measurement are used for determining contact angle β. The value is compared with the permissible value.

EFFECT: prolonged service life.

5 cl, 1 dwg

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