How fitting parts and a device for its implementation

 

(57) Abstract:

Usage: in an automated Assembly-line production. The essence of the invention: process fitting to the shaft 3 is applied static pressure from the press. Simultaneously the shaft and the sleeve 2 excite acoustic oscillations, achieving resonance. These oscillations excite the vibrator 4, mounted on the shaft 3. Fluctuations, which have formed the connection perceived by the acceleration sensor 5 and converted into an electrical signal, which postupaet to the input of the first integrator 13 and the second input of the first gain block 10 the force Sensor 9 outputs a signal proportional to the strength of the interaction between the vibrator 4 and the shaft. For measuring the force of the shot, acceleration, velocity, vibromaster and registration inertial, dissipative and elastic characteristics in the linear function of the relative movement of the joined parts are used, the displacement sensors 6, the recording unit and the control unit. 2 S. p. f-crystals, 1 Il.

The invention relates to mechanical engineering and can be applied in an automated Assembly-line production.

There is a method of pressing parts, in which one of the parts prekladatelska of this method is the lack of control of the quality of the connection.

The closest technical solution of the invention is a method of pressing parts, which consists in the fact that one of the components put a constant static pressure, stir in one of the connected details of the elastic oscillations, whose frequencies are changed in the process of pressing, providing resonance [2]

Device for mounting components by a known method [2] contains the application node to one of the components constant static pressure, the vibrator and the clamping device for the installation of one of the parts to be assembled.

The disadvantage of such a method and device for pressing parts is the low accuracy of estimation of quality of the connection.

The objective of the invention is to improve the accuracy of assessing the quality of connections by increasing the information content of the measurements.

The essence of the invention lies in the fact that according to the way in which one of the parts make constant static pressure, stir in one of the connected details of the elastic oscillations, the frequency of which change in the pressing process, providing resonance, advanced in the process of fitting measured informative parameters obtained which, when this is measured in linear functions of the relative movement l connected details the efforts of the embedding F(l) and acceleration (l), which determine the value of vibration velocity (l), vibromaster X(l), as well as informative parameters using inertia M(l), dissipative(l) and elastic(l) characteristics of the resulting compounds defined by formulas

M(l) K(l) C(l) , where l relative movement soedinenii details;

F force pressing;

the acceleration;

velocity;

X vibromassage;

M inertial characteristics of the connection;

To the dissipative characteristics of the connection;

With the elastic characteristic of the connection.

In a device for pulling the parts that contain the applications node to one of the components constant static pressure, the vibrator and the clamping device for the installation of one of the parts to be assembled, inputs of the first and second integrators, three unit, three units of comparison, three blocks of the reference values, the motion sensor and fixed to the vibrator force sensor, the output of which is connected to the inputs of the first, second and third blocks dividing the outputs are connected respectively to input what about the outputs of the first, the second and third blocks of the reference values, the outputs of which are connected to the outputs of the control unit, the input of which is connected with the displacement transducer, the output of the acceleration sensor is connected to the first integrator and the second input of the first unit, the output of the first integrator is connected with the second input of the second unit and the second integrator, the output of which is connected to a second input of the third unit and the recording unit is connected to the output of the motion sensor and the outputs of the first, second and third blocks of the comparison.

Implementation of the proposed method is illustrated with the help of the device shown in the drawing.

The device comprises a clamping device 1 for sleeve 2, in which zapressovyvajutsja shaft 3. On the shaft 3 is fixed to the vibrator 4 and the sleeve 2, the acceleration sensor 5 (accelerometer). On the clamping fixture mounted sensor 6 displacement measuring tip 7 which through the hole 8 in the clamping device communicates with the shaft 3.

The pressing force from the press (not shown) through the vibrator 4 and the force sensor 9 acts on the shaft 3. The output of the force sensor 9 is connected to the first inputs, respectively, of the first 10, second 11, and the input of the first integrator 13. The yield of the latter is connected to the input of the second integrator 14 and the second input of the second unit 11. The output of the second integrator 14 is connected to the second input of the third unit 12. The outputs of the first 10, second 11 and third 12 blocks dividing connected respectively to the first inputs of the first 15, second 16 and third 17 blocks comparison with the second inputs of which are connected to the outputs of the first 18, 19 second and third 20 blocks of the reference values. The output of the displacement sensor 6 connected to the first input unit 21 of the Desk and the input unit 22 of the control, first, second and third outputs of which are connected respectively to the inputs of the first 18, 19 second and third 20 blocks of the reference values. The outputs of the first 15, second 16 and third 17 blocks comparison connected respectively to the second, third and fourth inputs of the recording unit 21.

The method is as follows.

In the process of fitting to the shaft 3 is applied static pressure, at the same time in Vale excite using the vibrator 4 elastic vibrations, achieving resonance. Vibrations passed through the formed connection (shaft 3 and sleeve 2), are perceived by the acceleration sensor 5 and converted into an electrical signal , which is poluchaetsya electrical signal velocity , supplied to the second integrator 14. After the second integrator 14 signal vibro X is supplied to the second input of the third unit 12. The force sensor 9 outputs a signal proportional to the force of interaction F between the vibrator 4 and the shaft 3. The output signal from the force sensor 9 is supplied to the first inputs of the first 10, second 11 and third 12 units of the division.

The output of the first 10 unit produces a signal proportional to the ratio of the values of F and a , which corresponds to the inertial characteristics of the M form connections. On the second output 11 of the block dividing a signal is generated that is proportional to the ratio of the values of F and corresponding dissipative characteristics To form compounds. The output of the third 12 unit produces a signal proportional to the ratio of the values of F and X, the corresponding elastic characteristics of the formed compounds. The signals from the outputs of the first 10, second 11 and third 12 blocks dividing arrive at the first inputs, respectively, of the first 15, second 16 and third 17 units of comparison. On the second inputs of the blocks of the comparison signals from the first 18, 19 second and third 20 blocks of the reference values. In the first block 18, a signal is generated corresponding to Etalon is proportional respectively To dissipative and elastic With the characteristics of the formed compounds.

Linear relative movement l of the connected parts is measured by the displacement sensor 6, the signal of which is fed to the inputs of the blocks 21 and 22. The control unit 22 in accordance with the change of the relative movement l of connected components changes the reference values of the inertial, dissipative and elastic characteristics in blocks 18, 19, 20 reference values. The results of the comparison of the current values of the inertial, dissipative and elastic characteristics with reference values from the first 15, second 16 and third 17 blocks comparison enter the registration unit 21, where it is recorded simultaneously with the signal to move.

This method of pressing parts and device for its implementation allow to get information about the process of pressing, to identify deviations from normal.

Increasing the depth diagnostics through separate measurements of inertial, dissipative and elastic characteristics, makes it possible to identify and localize thin defects, improve quality connections without the stringency of the technology at the expense of means and methods of control.

1. How fitting parts, wherein one of the connected details make the t in the process of pressing, providing resonance, characterized in that in the process of fitting measured informative parameters derived compounds, compare them with reference values and are judged on the quality of the pressing, the comparison results, when this is measured in linear functions of the relative movement l of the connected parts, the pressing force F and the acceleration which determine the value of the velocity and vibromaster X, as well as informative parameters using inertia M(l), dissipative K(l) and elastic C(l) characteristics of the resulting compounds defined by the following formulas:

< / BR>
< / BR>
< / BR>
2. Device for pulling the parts that contain the applications node to one of the joined parts, static pressure, the vibrator and the clamping device for the installation of one of the joined parts, characterized in that it introduced the first and second integrators, three unit, three units of comparison, three blocks of the reference values, the motion sensor and fixed to the vibrator force sensor, the output of which is connected to the inputs of the first, second and third blocks dividing the outputs are connected respectively to the inputs of the first, second and third blocks of sravneniyam reference values, the inputs of which are connected to the outputs of the control unit, the input of which is connected with the displacement transducer, the output of the acceleration sensor connected to the first intergator and the second input of the first unit, the output of the first integrator is connected with the second input of the second unit and the second integrator, the output of which is connected to a second input of the third unit and the recording unit is connected to the output of the motion sensor and the outputs of the first, second and third unit of comparison.

 

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