CS205175B1 - Device for shape checking of barrel-shaped roller - Google Patents

Description

BACKGROUND OF THE INVENTION The invention relates to an evaluation device for the shape inspection of barrel-shaped bearing bodies.

The shape of the barrel-shaped bearing body can be characterized by diameter, usually the maximum diameter, on the one hand, the radius forming the circle and, on the other hand, the position of the center of the circle in the direction of the axis of the body. In addition, the last two parameters can be considered separately for the left and right sides of the body.

Prior art devices for measuring these characteristic values operate by placing the controlled bearing body in a suitable mechanical jig and measuring the position of several points of the housing in the selected section. To simplify the subsequent processing of the measured data, the position of the controlled body is adjusted, if necessary, so that some of the measured quantity has a desired, usually zero value. The measured values are read and the characteristic values are determined from these values according to the tables or formulas adjusted for each particular type of bearing.

This process is relatively complex, costly and slow, especially when it comes to checking in mass production.

If the resulting quality of the product depends on the conformity of the bearing bodies and the control proves necessary, one of the most important parameters, usually the diameter and the control, or the control, is chosen.

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205 175 sorting, carried out by him. In this procedure, it is assumed that the other parameters are either constant or change in parallel with the main parameter. This necessarily creates a product group whose characteristic values are influenced by the variance in manufacturing technology differently than expected and this simplified control procedure is not able to detect such deviations.

The deficiencies in the current inspection of the spherical bearing bodies are eliminated by the shape inspection device of the spherical bearing bodies according to the invention. Its essence is that the outputs of the sensors are connected to the corresponding measuring part and the output from the first measuring part is connected both to the input of the first multiplier, which is connected to the input of the first summator and to the input of the fourth multiplier connected to the input of the second summer and the output of the second measuring part is connected to inputs of the second multiplier and the fifth multiplier connected to the input of the second summer and to the third summer and to the eighth selection input of the switching part and output from the third the measuring part is connected to inputs of the third multiplier and the sixth multiplier, which is connected via the first inverter to the input of the second summer and the output from the fourth measuring part is connected to the inputs of the seventh multiplier and the eighth multiplier. connected to the evaluation part, the eighth multiplier directly and the seventh multiplier via the fifth inverter and the third accumulator, which has its output connected to the seventh selection input of the switching part, the output of the second multiplier being connected directly to the second selection input and the second inverter the first sampling input and output of the third multiplier are connected directly to the third sampling input and via the third inverter to the fourth sampling input and the output of the second summator is connected directly to the fifth sampling input and the fourth inverter to the sixth sample input; the second selection output of the switching part is connected to the inputs of the first summer, which is connected to the evaluation part, to which the third selection output and the fourth selection output of the switch are directly connected.

The device according to the invention makes it possible to eliminate the lengthy calculations that are otherwise necessary to determine the characteristic values from the values obtained by the measurement. At the same time, the device according to the invention can be used for sorting the controlled spherical bodies into tolerance groups according to preselected values and combinations of the main and secondary parameters.

The invention is illustrated in the accompanying drawings, in which: Figures 1 and 2 are schematic representations of examples of arrangements for inspecting type A and B barrel-shaped bearing bodies in a selected cutting plane;

The measurement is carried out in three sections using four sensors and two measuring supports. The location of the cut is selected so as to cover the maximum portion of the surface of the body and to measure the diameter d of the body of the body in one of them. With regard to this measurement, a combination of surface and point contact points is selected. The bearing bodies are divided into two basic groups. Type A (Fig. 1) is characterized in that the diameter of the body ae is located in the center of the cross section. Type B (Fig. 2) is characterized in that the diameter is in the marginal section.

The device consists of the first to fourth sensors JL, 2 »2» £ from the first to fourth measuring part 11. 12. 13. 14. from the first to eighth multipliers 21, 22, 23. 24. 25, 26. 27, 28 from the first to fifth inverters 2i »22.» 12. »14» 11 » ^{from the} first to third summers 41, £ 2. £ 2. from the switching part 50 and from the evaluation part 60.

The outputs of the first to fourth sensors 1, 2, 2 »1 are connected to the corresponding measuring part 11, 12. 13. 14. The output of the first measuring part 11 is connected to the input of the first multiplier 21, which is connected to the input of the first sumper 41 and second t. lemihi ·!

to the input of the fourth multiplier 24, which is connected to the input of the second summer by its output. 42. The output of the second measuring portion 12 is connected to the inputs of the second multiplier 22 and the fifth multiplier 25, which is connected to the input of the second summer 42 and the third summer 43 and to the eighth selection tup 58 of the switching part 50. The output of the third measuring part 13 is connected to the inputs of the third multiplier 23 and the sixth multiplier 26, which is connected via the first inverter 31 to the input of the second summer 42. The output of the fourth measuring part 14 is connected to the inputs of the seventh multiplier 27 and the eighth 28. having their outputs connected to the evaluation part 60, namely the eighth multiplier 25 directly to the seventh multiplier 27 via the fifth inverter 35 and second to the third summer 43. which has its output connected to the seventh selection input gj of the switch part 50. the multiplier 22 is connected directly to the second sample the input 52 and via the second inverter 32 to the first selection input 51. The output from the third multiplier 23 is connected directly to the third selection input 53 and via the third inverter '; to the fourth selection input 54. The output from the second summator 42 is connected directly to the fifth selection input 55 and via the fourth inverter 34 to the sixth selection input 56. The first selection output 501 and the second selection output 502 of the switching section 50 are connected to the inputs which is connected to an evaluation section 60 to which the third selection output 503 and the fourth selection output 504 of the switching section 50 are directly connected.

The operation of the device is based on the fact that the functional relationships between the measured values corresponding to the changes of the contact surfaces of the first to fourth sensors and the changes of the characteristic values can be linearized within the range of normal manufacturing tolerances with an error not exceeding 2%.

For a type A barrel:

^R 1 ^to 1 ^S 1 ^ 2 ^S 2 ^{+ to} 3 ^S 3 "^ 4 ^s i ⁺ ^ 5 - ^ 6 $ 3

D »Sj + ^R 2 ⁼ “ ^to 7 ^S 4 ^L 2 ^{= to} 8 ^S 4 (1) (2) (3) (4) (5)

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The following applies to the spherical roller bearing type B:

D · S ₂

^R 1 ^if l ^S 1 ^{+ k} 2 ^S 2 “ ^k 3 ®3 (6) Lj ^and - Sj - to $ Sg + kg (7) D and Sg (8) Rg a - cy Italy (9) ^L 2 ^{= k} 8 ^S 4 (10)

where Sp Sg, Sp S 1 are changes in the positions of the first to fourth sensors 1, 2., £, £, D is the change in diameter d, Rj, Rg is the change in radius of forming circles rp r ₂ and Lp Lg are changes in coordinates _lp lg} kg up to _Q , the multiplication coefficients are characteristic for each type of spherical roller bearing and for the particular mechanical arrangement of the measuring device.

During the inspection, the bearing body is placed in a suitable mechanical jig, which comprises the first to fourth sensors 8, 2, 4, 4. The sensors take the position of the determined throws of the surface of the bearing in the selected section. , 13.

to a suitable metering quantity. Another part of the device realizes the mathematical relations described by the set of equations (1) to (5) or (6) to (10). The first to eighth multiplier 21,

22, 24, 25, 26, 27, 28 multiply the signals from the first to fourth measurement parts 11,

12, 13, by the corresponding coefficients kj to kg. In this way, individual sub-products from equations are realized on their outputs. An alternative selection of type A or B is realized by the switching part 50 using four simultaneously operating sections. Corresponding sign changes are made by the first to fifth invartors 31. 32. 33. 34. 35. The sums of the sub-products are performed in the first to third summers 64 and 42, 42, wherein the first summer 41 realizes the sums in equation (1) or. (6), the second summator 42 in equation (2), optionally. (7) and the third summator 43 in equation (3). As a result, the resulting signals arriving at the evaluation section 60 correspond to the variations in the characteristic values -j, rj, rg, lj and lg.

From the values entering the evaluation section 60, it is possible to determine whether the shape of the inspected body is within assumed tolerances or the bodies are classified into groups that meet the assumed tolerances. The evaluation section 60 performs the final processing of the resulting signals. In the simplest case, this is an indication of deviations of the individual characteristic values. The more complex evaluation section 60 can display these deviations in the tolerance fields or sort into groups according to specific requirements.

The described example of the device represents a basic modification of the universal device for shape control of various types of bearings. Other modifications may be made by changing the order of the summers and inverters or multipliers resulting from the application of mathematical laws to the * system of equations (1) to (5) or (6) to (10). Other single-purpose modifications may be made by replacing the switch portion 50 with strong bonds.

Claims (1)

Object of the invention Device for shape inspection of barrel-shaped bearing bodies consisting of four sensors, four measuring parts and an evaluation part, characterized in that the sensor outputs (1,2,3,4) are connected to the corresponding measuring parts (11,12,13,14) and the output of the first measuring part (11) is connected to the input of the first multiplier (21), which is connected to the input of the first summer (41) and to the input of the fourth multiplier (24), which is connected to the input of the second summer (42) and the output of the second measuring portion (12) is connected to the inputs of the second multiplier (22) and the fifth multiplier (25), which is connected to the input of the second summer (42) and the third summer (43); both the eighth selection input (58) of the switching part (50) and the output of the third measurement part (13) are connected to the inputs of the third multiplier (23) and the sixth multiplier (26) which is connected via its first inverter (31) to the input of the second summer (42) and the output from the fourth measuring part (14) is connected to the inputs of the seventh multiplier (27) and the eighth multiplier (28). to the evaluation part (60), namely the eighth multiplier (28) directly and the seventh multiplier (27) via the fifth inverter (35) and the third summer (43), which has its output connected to the seventh selection input (57) of the switching part (50), the output from the second multiplier (22) is connected directly to the second selection input (52) and via the second inverter (32) to the first selection input (51) and the output from the third multiplier (23) is connected directly to the third the selection input (53) and through the third inverter (33) to the fourth selection input (54) and the output from the second summator (42) is connected directly to the fifth selection input (55) and through the fourth inverter (34) to the sixth selection an input (56), wherein, the first selection input (501) and the second selection output (502) of the switching part (50) are connected to the inputs of the first summer (41), which is output to the evaluation part (60) to which they are directly connected the third selection output (503) and the fourth selection output (504) of the switching part (50).