SU1732138A1 - Apparatus for checking the conic wheels - Google Patents

Abstract

The invention relates to the machine building and may be used particularly in the bevel gear control field.The propose of the invention consists in increasing the functional possibilities by ensuring the possibility of teeth profile control, the conic axoid angle error and the step error and increasing the controlled wheels nomenclature at the expense of ensuring the possibility of the precession level gear control. This is achieved by the fact that the arrangement comprising a basis on which are installed the carriage and the rack gear and on the carriage are installed an electric motor, a reduction gear, the driven shaft which is connected to the spindle with which are connected the level and the measuring head, it is provided with the micrometric screwdrive and the linear displacements transducers. On the spindle is installed the angular turn transducer. On the basis is fixed the controlled level gear, and on the carriage - the microprocessor.The wheel profile control is carried out by comparing the real profile coordinates with the theoretic profile coordinates, installed in the microprocessor storage.

Description

This invention relates to mechanical engineering, in particular to the control of bevel gears.

A device for controlling gear wheels is known, comprising a toothed inductive goniometric assembly consisting of a stator and a rotor on which a test article is fixed, a rotor drive and a stator re-turn knot, equipped with a micrometric screw drive associated with a pulse sensor and a counter of pulses coming from .

However, using the known device it is impossible to determine the error profile of the teeth.

Closest to the invention is a device for controlling bevel gears, comprising a stand on which a spindle is mounted, which is mounted on a movable carriage, an electric motor and a gearbox, through which the rotation of the spindle is communicated.

The functionality of the prior art device is limited by the fact that it is not possible to control the conical wheels of the precession gears, as well as to control a limited number of parameters.

The purpose of the invention is to expand the functionality by enabling the control of the tooth profile, the error of the angle of the conical axoid and the error of the pitch and the expansion of the nomenclature of the wheels being monitored by allowing the control of the conical wheels of the precession gears.

A device for controlling conical wheels, comprising a base, a rack mounted on it, a carriage mounted on a rack, a spindle and an electric motor mounted on a carriage and kinematically connected to each other, and a measuring head with a housing in which the measuring head is made in the form of two sensors linear displacements

installed perpendicularly in the housing, the first of which is designed to determine the length of the section forming a cone, the second to measure the height

surfaces of the tooth, measuring needle, axially spring-loaded relative to the head body and connected to the second sensor, and micrometric screw drive, kinematically connected with the head body, and the device is equipped with a lever, one end of which is mounted at the free end of the spindle and the other it is intended for mounting the measuring head housing on it, a spindle angle sensor, kinematically connected with a spindle, and a microprocessor connected with a spindle angle sensor and the first and second sensors. In this case, the lever can be fixed on the carriage, and the fixture is provided with a female rotating table,

a drive wheel to be placed on it, and a drive with a gearbox and a steering angle sensor are kinematically connected to a turntable.

5 In FIG. 1 shows a device for controlling the bevel gears of precession gears; in fig. 2 is a view A of FIG. 1; in fig. 3 — real and theoretical profiles of the measured wheel; in fig. 4 - gauge0 per head; in fig. 5 is a variant of the device.

The fixture comprises a base 1, on which a carriage 2 is mounted, connected to the base 1 by means of connecting a dovetail 3 and a rack and pinion gear 4. On the carriage 2 there is an electric motor 5, a gearbox 6, the driven shaft of which is rigidly connected with the spindle 7, with which tabs 8 are associated lever 9. On

0 a lever 9 by means of connecting a dovetail 10 is placed a measuring head 11 equipped with a micrometric screw drive 12 and including a measuring needle 13 spring-loaded in the axial direction and sensors 14 and 15 of linear displacements. On the spindle 7, an angular rotation sensor 16 is installed, the casing of which is connected with the carriage 2 by means of a parallelogram device 17. On the base 1 a controlled conical wheel 18 is fixed, and a microprocessor 19 is mounted on the carriage.

In the tool of FIG. 5, the measuring head 11 is rigidly connected to the carriage 2. The screw drive 12, the measuring head 11 can be brought to the center or from the center of the conical axoid of the controlled wheel 18, which is mounted on the turntable 20. The table is equipped with a table rotation angle sensor 21 and driven 22.

The device works as follows.

On the base 1, a test wheel 18 is mounted and secured. Then, using a rack and pinion gear 4 and carriage 2, the measuring head 11 is guided to the test surface of the tooth of the wheel 18 before the measuring needle 13 contacts the lip surface. Using a micrometer screw actuator 12, the measuring needle 13 leads to a controlled section of the tooth of the wheel 18. At the same time, the lowest point A (X0pYop) is recorded by the sensor 14, which is taken as the starting point from which the countdown will take place. Next, the motor 5 is turned on, the shaft rotation of which is reduced by the gear 6, which has a large gear ratio to effect the slow rotation of the spindle 7. The microprocessor 19 also turns on the motor 5 simultaneously. The rotation of the spindle 7 will cause the linear needle 13 to move linearly wheels 18, the coordinate YJP (Fig. 3) of which is recorded by the sensor 14 and compared with the similar coordinate YIT of the corresponding point A (X | T, YIT) of the theoretical profile laid in microprocessor memory 19. The YIP coordinate of the real profile is obtained indirectly. The rotation angle sensor 15 fixes with high accuracy the rotation angle of the measuring head 11 and transmits information to the microprocessor 19, the memory of which contains the cone distance RI of the tooth section being monitored. Then

Yip 2Ri -sin (aj / 2),

where “is the angle of rotation of the measuring needle; RI is the tapered distance of the controlled section.

The resulting YIP coordinate of point A

is compared with a similar coordinate YIT of the corresponding point A (X | T, Y | T) of the theoretical profile. As a result of comparing the Xip and YIP coordinates of point A of a real profile with the coordinates X | T and YJT of point A of a theoretical profile by a microprocessor, the result falls out in various forms (in the form of tables on a printing device or on a display screen). This is especially useful for controlling conical wheels with a non-standard profile for precession gears, whose tooth profile is described by a curve, the equation of which is easily represented in parametric form.

Taking into account that the ball of the measuring needle is in contact with the tooth profile at different points of the sphere of the ball, having different coordinates along the X axis, to obtain more reliable information it is necessary to each obtained coordinate

Xip real profile add ai r (1-sin QW), where r is the radius of the measuring needle ball; It is the angle of engagement (angle of the tooth profile) at the measured point.

To measure the angle error of the conical axoid by means of a micrometric screw drive 12, the measuring head 11 moves along the root of the tooth to the top of the conical axoid. In this case, the measuring needle 13, overcoming the force of the spring, will move in the axial direction, and the information from the transmitters 14 and 15 will go to the microprocessor 19. The value of the theoretical angle of the conical axoid is also stored in the memory of the microprocessor 19. Using the information received by the microprocessor, the real angle of the conical axoid is calculated using the formula

Ј arctg-,

where H is the amount of movement of the measuring needle (sensor reads 14 linear displacements;

I is the amount of movement of the measuring head 11 (sensor reads 15 movements),

is compared with the angle of the axoid of the theoretical profile and the result of this comparison is given (difference of magnitudes).

The device also measures the error by the pitch of the bevel gears. To do this, it is enough to measure the coordinates of points of the same-named profiles of two adjacent teeth and compare the values

Yip coordinates - and points. The difference between them and the error will be in step.

In the tool of FIG. 5, the measuring head is stationary in the circumferential direction, and the controlled wheel 18 rotates. The coordinates of the points of the real tooth profile are also measured in the tool of FIG. The coordinate Yip is measured with a sensor 21 of the angular positions of the table.

Claims (2)

Claim 1. A device for controlling conical wheels, comprising a base, a rack mounted on it, a carriage mounted on a rack, a spindle and an electric motor mounted on a carriage and kinematically connected to each other, and a measuring head with a housing, characterized in that in order to extend the functionality by enabling control of the tooth profile, the error of the angle of the conical axes and the error of the pitch and expansion of the range of controlled wheels by ozhnosti control precessional bevel gear, the measuring head is designed as a two linear displacement sensors mounted in the housing mutually perpendicular, the first of which is designed to determine the length of the section forming the cone, the second to measure the height of the tooth surface, the measuring needle, axially spring-loaded relative to the head housing and connected to the second sensor, and the micrometer screw drive, kinematically connected with the body of the head, and the device is equipped with a lever, one end of which is cantilever mounted on the free end of the spindle, and the other is designed l installation thereon the measuring head body, the spindle rotation angle sensor is kinematically associated with the spindle, and a microprocessor associated with the spindle rotation angle sensor and the first and second sensors. 2. The fixture according to claim 1, stating that the console arm is attached to the carriage, and the fixture is equipped with a rotary table, designed to accommodate a controlled wheel on it, and an actuator with a gearbox and angle sensor the turns are kinematically associated with the turntable. Bad a / // // / / / / / / / / / / / U / / // //// // 2. J L II 13 14 L (top, yopJ 4ig.Z /,  / YaSh Wd X ,. L (, Set 2 15 II