CN207180613U - Non-contact type bearing lasso external diameter measuring device - Google Patents

Abstract

The utility model relates to a non-contact measuring device for the outer diameter of a bearing ring, which comprises a sensor mounting frame, and the transmission mounting frame is provided with two laser displacement sensors distributed along the radial interval of the bearing ring, and each laser displacement sensor has a For the measuring head facing the outer surface of the bearing ring, the measuring heads of the two laser displacement sensors are arranged facing each other, and the measuring device also includes a rotation driving mechanism for realizing the relative rotation of the bearing ring to be measured and the two laser displacement sensors. The non-contact laser displacement sensor is used for measurement, which can effectively avoid scratching the measured parts and ensure the surface integrity of the parts. The relative rotation between the bearing ring and the two laser displacement sensors is realized by using the rotating drive mechanism, so that the outer diameter and the variation of the outer diameter of the bearing ring at different angular positions can be measured, thereby effectively improving the measurement accuracy.

Description

Non-contact Bearing Ring Outer Diameter Measuring Device

technical field

The utility model relates to a non-contact bearing ring outer diameter measuring device.

Background technique

Bearing is a kind of high-precision mechanical parts. Its size and geometry are the main factors of bearing accuracy level. Measurement is a necessary means to judge size and geometry. At present, in the bearing processing process and its finished product measurement, most of the bearing special instruments are used to realize the measurement. Bearing-specific instruments have the advantages of simple operation, easy learning, low price, durability, and high measurement efficiency, but they also have certain limitations:

(1) The cemented carbide probe used in bearing special instruments is easy to scratch the surface of the bearing parts during the measurement process. Ordinary bearings are acceptable, but any tiny flaws in high-precision bearings will affect product quality, which is absolutely unacceptable. Allowed.

(2) For some thin-walled bearings, manual measurement is performed on a special instrument, and the external force of the hand has a great influence on the measurement results, which is far from meeting the requirements of the bearing accuracy for measurement.

(3) The display value error of the special instrument is relatively large, which cannot meet the measurement requirements of some precision bearings.

(4) There are many deficiencies in the use of other high-precision measuring instruments: ① contact measurement is mostly a two-point measurement method for determining the diameter, and only one diameter can be measured at a time, which cannot meet the requirements of the bearing inspection standard for parameters such as average diameter and diameter variation , and the time is long and the efficiency is low. ②Contact measurement has force measurement, which also affects thin-walled bearing parts. ③Contact measurement will cause different degrees of scratches on the surface of the part. ④The measurement accuracy of non-contact measurement is low. Limited by the measurement principle, the measurement cannot be completed for individual requirements.

In the Chinese invention patent whose authorized announcement number is CN101733680B, a non-contact online measurement method of a large bearing raceway is disclosed. A laser displacement sensor installed on a CNC machine tool is used to realize the non-contact measurement of the bearing raceway, but The measurement device used in this measurement method is only equipped with a single laser displacement sensor, which can neither measure the radius of the inner and outer diameter of the bearing ring, nor the diameter of the inner and outer diameter of the bearing ring, and still cannot solve the problem of high precision. The problem of accurate measurement of the inner and outer diameters of bearing rings.

Utility model content

The purpose of the utility model is to provide a non-contact bearing ring outer diameter measuring device with simple structure and high measuring precision.

In order to achieve the above purpose, the technical scheme of the non-contact bearing ring outer diameter measuring device of the present invention is: a non-contact bearing ring outer diameter measuring device, including a sensor mounting frame, and the transmission mounting frame is provided with a bearing Two laser displacement sensors distributed radially on the ring, each laser displacement sensor has a measuring head for facing the outer surface of the bearing ring, the measuring heads of the two laser displacement sensors are arranged opposite to each other, and the measuring device also includes a measuring head for realizing the The bearing ring and the two laser displacement sensors rotate relative to the driving mechanism.

The spacing distribution direction of the two laser displacement sensors is defined as the left-right direction, and the two laser displacement sensors are assembled on the sensor installation frame with an adjustable spacing along the left-right direction.

The two laser displacement sensors are respectively mounted on the sensor mounting frame through a moving frame, and the sensor mounting frame is provided with an adjustment screw extending along the left and right directions for adjusting the movement of the two laser displacement sensors towards each other and opposite to each other. The moving frames are respectively provided with threaded holes set on the adjusting screw rods. The adjusting screw rods have two threaded segments corresponding to the screwed holes on the two moving frames. The two threaded segments rotate in opposite directions. A guide piece is provided to guide the two mobile frames to move along the left and right directions.

The rotation driving mechanism is used to drive the bearing ring to be tested to rotate so as to realize the relative rotation of the bearing ring to be tested and the two laser displacement sensors. The rotation driving mechanism includes a turntable for carrying the bearing ring to be tested, and the turntable is driven by a motor to rotate.

The measuring device also includes an angular displacement encoder for controlling the rotation of the turntable at a set angle, and the angular displacement encoder is connected to the motor control.

The measuring device also includes an axial adjustment mechanism that drives the sensor installation frame to move axially along the bearing ring with the two laser displacement sensors, and an axial detector for detecting the axial displacement of the two laser displacement sensors along the bearing ring.

The measuring device also includes a radial adjustment mechanism for driving the sensor mounting frame to move along a plane perpendicular to the axial direction of the bearing ring with the two laser displacement sensors, and for detecting the displacement of the two laser displacement sensors driven by the radial adjustment mechanism radial detector.

The measuring device includes a data receiving and processing module for connecting with the signal output terminals of the two laser displacement sensors.

The beneficial effects of the utility model are: in the non-contact bearing ring outer diameter measuring device provided by the utility model, two laser displacement sensors are used to measure the outer diameter of the bearing ring, and the measurement accuracy is ensured. The non-contact laser displacement sensor is used for measurement, which can effectively avoid scratching the measured parts and ensure the surface integrity of the parts. The relative rotation between the bearing ring and the two laser displacement sensors is realized by using the rotating drive mechanism, so that the outer diameter and the variation of the outer diameter of the bearing ring at different angular positions can be measured, thereby effectively improving the measurement accuracy.

Further, the distance between the two laser displacement sensors can be adjusted along the left and right directions, so that the distance between the laser displacement sensors can be adjusted to adapt to bearing rings of different sizes.

Further, the spacing of the laser displacement sensor for adjusting the adjustment amount of the screw rod is selected, and the adjustment is convenient and reliable.

Further, the measuring device also includes an angular displacement encoder, which can control the rotation of the turntable with the bearing ring at a set angle according to the interval as required, so as to improve the efficiency of rotation measurement.

Further, the measuring device includes an axial adjustment mechanism, so that the corresponding radial dimensions of the cross-sections at different axial positions of the bearing ring can be measured.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of a non-contact bearing ring outer diameter measuring device provided by the present invention;

Fig. 2 is a structural schematic diagram of the sensor mounting frame in Fig. 1;

Fig. 3 is a schematic diagram of measuring the outer diameter of a bearing ring by using the measuring device shown in Fig. 1 .

Detailed ways

Embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

The specific embodiment of the non-contact bearing ring outer diameter measuring device provided by the utility model, as shown in Figure 1 to Figure 3, the measuring device in this embodiment includes a base 20, which is installed by a sliding table adjustment mechanism There is a sensor mounting frame 8, and the sensor mounting frame 8 is provided with two laser displacement sensors distributed along the radial interval of the bearing ring. In this embodiment, the spacing distribution direction of the two laser displacement sensors is defined as the left and right direction, and the two laser displacement sensors It includes a first sensor 5 and a second sensor 7, each laser displacement sensor has a measuring head for facing the outer surface of the bearing ring, and the measuring heads of the two laser displacement sensors are arranged facing each other.

In this embodiment, each laser displacement sensor is installed on the sensor installation frame movably along the left and right directions through the moving frame respectively, and the two moving frames are the first moving frame 26 corresponding to the first sensor 5 and the first moving frame 26 corresponding to the second sensor 7. Two moving frames 24 are provided with the adjusting screw rod 23 extending along the left-right direction on the sensor mounting frame 8 and are used to adjust the two laser displacement sensors to move toward each other and move away from each other. As for the threaded hole, the adjusting screw rod 23 has two threaded sections corresponding to the threaded holes on the two moving frames, and the two threaded sections have opposite directions of rotation. Moreover, the sensor installation frame 8 is also provided with a guide piece 25 that guides the two mobile frames to move in the left and right directions, and the guide piece 25 is specifically a guide rod that guides and cooperates with the two mobile frames.

For the convenience of operation, one end of the adjustment screw rod 23 is extended out of the sensor mounting bracket in the axial direction, and a handle 27 is provided at the extended end of the adjustment screw rod to facilitate the measurement personnel to rotate the adjustment screw rod 23 and then control the two laser displacement sensors to face each other or Move the adjustment inversely.

The measuring device also includes a rotating drive mechanism for realizing the relative rotation of the bearing ring to be tested and the two laser displacement sensors. In this embodiment, in order to facilitate the measurement of the outer diameter of the bearing ring, the rotating drive mechanism specifically includes a The turntable 4 of the ferrule 5, the turntable 4 is driven to rotate by the motor 21 through the first shaft coupling 3, and is correspondingly equipped with an angular displacement encoder 22 connected to the motor 21, which is controlled as a rotation angle controller The motor 21 drives the bearing ring to be tested to rotate at a set angle, that is, to stop after rotating the set angle for measurement, and then to stop at the set angle for measurement.

In this embodiment, the sliding table adjustment mechanism includes a vertical guide rail 9 provided on the base 20 with a guiding direction extending along the vertical direction up and down. Axially parallel, an axial adjustment mechanism is provided on the vertical guide rail 9. The axial adjustment mechanism is used to drive the sensor mounting frame 8 to move axially along the bearing ring with two laser displacement sensors. The axial adjustment mechanism specifically includes a vertical wire The rod 12, the vertical lead screw 12 is driven by the vertical motor 11 through the second coupling 10, and the vertical lead screw 12 is correspondingly equipped with a mounting frame for driving the sensor with two laser displacement sensors on a plane perpendicular to the axial direction of the bearing ring The radial adjustment mechanism that moves inside, the radial adjustment mechanism includes the horizontal guide rail 18 that is assembled on the vertical guide rail 9 along the up and down vertical direction, and the horizontal guide rail 18 is driven by the vertical screw 12, and the vertical screw 12 rotates and then drives the horizontal guide rail in the vertical direction. Move up and down vertically to adjust. A horizontal sliding table 17 is installed on the horizontal guide rail 12 for guiding movement, and the sensor mounting frame 8 is fixedly installed on the horizontal sliding table 17. The horizontal sliding table 17 is driven by a horizontal lead screw 14 to move and adjust along the horizontal guide rail 18. The motor 16 is driven to rotate through the third coupling 15 .

In this embodiment, the above-mentioned radial adjustment mechanism is mainly used to move the two laser displacement sensors horizontally above the bearing ring to be tested, so as to facilitate the two laser displacement sensors to extend into the bearing ring. Then, use the available axial adjustment mechanism to drive the sensor mounting frame to move and adjust the two laser displacement sensors in the vertical direction, send the two laser displacement sensors to the outside of the bearing ring, and measure the bearing ring at different cross-sectional positions The outer diameter size.

In fact, corresponding to the axial adjustment mechanism, an axial detector for detecting the axial displacement of the two laser displacement sensors along the bearing ring is configured. The vertical grating ruler 13 that the horizontal guide rail moves axially along the bearing ring, because the two laser displacement sensors and the sensor mounting frame follow the horizontal slide table 17 and the horizontal guide rail 18 to move in the vertical direction up and down, can be realized by detecting the vertical displacement of the horizontal guide rail. Detection of vertical displacement of two laser displacement sensors.

Moreover, corresponding to the radial adjustment mechanism, a radial detector for detecting the displacement of the two laser displacement sensors driven by the radial adjustment mechanism is configured, and the radial detector is specifically a horizontal grating ruler 19 arranged on the side of the horizontal guide rail, The horizontal grating ruler 19 can realize the corresponding displacement of the two laser displacement sensors by detecting the horizontal displacement of the horizontal slide table 17 .

In addition, in this embodiment, the measurement device also includes a data receiving and processing module for connecting to the signal output terminals of the two laser displacement sensors, and the data receiving and processing module specifically includes a computer 1 and a measurement and control system 2 .

When using the measuring device provided in this embodiment to measure the outer diameter of a bearing ring, take a bearing ring with a nominal outer diameter of 30 mm as an example, and specifically describe the measurement implementation steps of the measuring device:

(1) Put the standard part with a length of 30mm on the turntable 4, drive the vertical screw 12 to rotate through the vertical motor 11 to make the horizontal guide rail 18 move vertically; drive the horizontal screw 14 to rotate through the horizontal motor 16 to make the horizontal sliding table 17 move horizontally , so as to drive the sensor installation frame 8 to move to the side of the standard part as a whole. Then, turn the handle 27 to rotate the adjustment screw 23 to adjust the horizontal distance between the two mobile frames, and simultaneously use a 30mm long standard part to calibrate the horizontal measurement distance between the two laser displacement sensors to 30mm. Subsequently, fix the two moving frames to keep the horizontal measuring distance between the two laser displacement sensors at 30 mm, and remove the standard parts.

(2) Put the tested bearing ring 6 on the turntable 4, adjust the upper and lower positions of the sensor mounting frame 8, so that the two laser displacement sensors extend into the tested bearing ring, as shown in Figure 3, and the A and B represent the laser beams respectively, and then the outer diameter of the bearing ring is measured by the comparative measurement method.

The introduction of the comparative measurement method takes a bearing ring with a nominal outer diameter of 30mm as an example: first, in step (1), use a standard part with a length of 30mm to calibrate the distance between the two laser displacement sensors as 30mm, and then lock the two laser displacement sensors The position of the bearing ring remains unchanged; then use two laser displacement sensors to measure the distance from the sensor to the outer surface of the bearing ring. 0.007=29.981mm.

(3) Adjust the rotation angle of the turntable 4 through the angular displacement encoder 22 and the motor 21, so that the measured bearing ring 6 rotates at a set angle, and the two laser displacement sensors measure the rotation according to the comparison measurement method in the above step (2). The outer diameter of the bearing ring after the corresponding angle. Continue to adjust the rotation angle of the turntable 4, and measure the outer diameter of the bearing ring at different angular positions and the variation of the outer diameter.

(4) The vertical screw 12 is driven by the vertical motor 11 to move the sensor mounting frame 8 vertically, and the vertical movement of the sensor mounting frame 8 drives the two laser displacement sensors to scan the outer surface of the bearing ring under test to realize the bearing ring Measurement of the outer diameter dimension at different cross-sections of the inner surface.

(5) The measurement data of (3) and (4) are transmitted to the computer 1 through the measurement and control system 2, and the computer 1 calculates and compares the outer diameter size and outer diameter size change at different angles and cross-sections of the inner surface of the bearing ring Measure the maximum diameter and ellipse size of the outer diameter of the bearing ring. Thus, the measurement of parameters such as outer diameter, size variation, and ellipse is completed.

In the measuring device provided in this embodiment, two laser displacement sensors are used to measure the outer diameter of the bearing ring, and a non-contact laser displacement sensor is used for measurement, which can effectively avoid scratching the measured part and ensure the surface integrity of the part sex. Moreover, the bearing ring is driven by the turntable to rotate at intervals to set the angle, so that the outer diameter and the variation of the outer diameter of the bearing ring at different angular positions can be measured. In addition, the axial adjustment mechanism can not only drive the two laser displacements From the sensor to the outer side of the bearing ring, the upper and lower positions of the two laser displacement sensors can also be adjusted, so as to realize the measurement of the outer diameter at different cross-sections.

During the measurement, two laser displacement sensors pass through the center of the bearing ring as a standard part and through the center of the bearing ring to be tested.

In this embodiment, a turntable is used to realize the relative rotation between the bearing ring under test and the two laser displacement sensors, which can avoid deformation caused by manual rotation operation and can effectively improve measurement accuracy, and is especially suitable for the measurement of thin-walled bearing rings. In other embodiments, the bearing ring to be tested can also be kept still, and the sensor mounting frame can be installed on a turntable as a whole, and the rotation of the turntable can be used to drive the two laser displacement sensors to rotate relative to the bearing ring to be tested. , the specific rotation drive mechanism can be designed and arranged according to the actual situation.

In this embodiment, an angular displacement encoder is used as a rotation angle controller to control the rotation angle of the tested bearing ring. In other embodiments, if the turntable is manually driven to rotate, the angle plate can also be used to control the turntable to rotate and set the angle.

In this embodiment, the axial adjustment mechanism specifically adopts a vertical lead screw, which is convenient to use a motor to drive and adjust. In other embodiments, a piston cylinder or an electric push rod driven by a servo motor can also be used to realize the movement adjustment of the sensor installation frame and the two laser displacement sensors in the vertical direction. Correspondingly, for the radial adjustment mechanism, a piston cylinder or an electric push rod driven by a servo motor can also be used to realize the movement adjustment of the sensor mounting frame and the two laser displacement sensors in the horizontal plane.

In this embodiment, the axial adjustment mechanism is used to drive the transmission rod mounting frame to move up and down with the two laser displacement sensors, so as to realize the relative movement of the bearing ring and the two laser displacement sensors in the axial direction of the bearing ring. In other embodiments, the corresponding axial adjustment mechanism can also be used to drive the bearing ring to move in the axial direction of the bearing ring, so as to realize the relative movement of the bearing ring and the two laser displacement sensors in the axial direction of the bearing ring.

In this embodiment, when the bearing ring is placed on the turntable, the axial direction of the bearing ring extends vertically. Correspondingly, for the convenience of measurement, the sensor mounting frame is located at the horizontal side of the bearing ring. In other embodiments, if the axial direction of the bearing ring is arranged horizontally, then the sensor installation frame can be arranged on the vertical side of the bearing ring.

In this embodiment, the adjustment screw rod is used to drive the two laser displacement sensors to move synchronously towards or against each other through the two moving frames. In other embodiments, corresponding piston cylinders or electric push rods driven by servo motors can also be configured to control the relative or opposite movement of the two laser displacement sensors.

In this embodiment, the axial adjustment mechanism is used to realize the movement and adjustment of the two sensor mounting frames and the two laser displacement sensors in the axial direction of the bearing ring, so that the measurement of the outer diameter of different sections can be realized. In other embodiments, when it is not necessary to measure cross-sections with different depths, the axial adjustment mechanism may not be provided, and the sensor installation frame may be placed outside the bearing ring manually.

Claims (7)

1. A non-contact bearing ring outer diameter measuring device is characterized in that: it comprises a sensor mount, and the transmission mount is provided with two laser displacement sensors distributed along the radial interval of the bearing ring, and the two laser displacement sensors The spacing distribution direction is defined as the left and right directions, and the two laser displacement sensors are assembled on the sensor mounting frame with adjustable spacing along the left and right directions, and the two laser displacement sensors extend along the front and rear directions and can be located on both sides outside the bearing ring to be tested , the two laser displacement sensors have measuring heads for facing the outer surface of the bearing ring respectively, the measuring heads of the two laser displacement sensors are arranged opposite to each other, and the measuring device also includes a device for realizing the relative rotation of the bearing ring to be measured and the two laser displacement sensors Turn the drive mechanism. 2. The non-contact bearing ring outer diameter measuring device according to claim 1, characterized in that: the two laser displacement sensors are respectively mounted on the sensor mounting frame through a moving frame, and the sensor mounting frame is provided with There are adjustment screw rods extending along the left and right directions for adjusting the movement of the two laser displacement sensors toward each other and opposite to each other. The two moving frames are respectively provided with threaded holes fitted on the adjusting screw rods. The adjusting screw rods have The threaded holes correspond to the two threaded sections that are screwed together, and the two threaded sections have opposite directions of rotation. The sensor mounting frame is also provided with a guide that guides the two moving frames to move in the left and right directions. 3. The non-contact bearing ring outer diameter measuring device according to claim 1 or 2, characterized in that: the rotating drive mechanism is used to drive the bearing ring to be tested to rotate so as to realize the bearing ring to be tested and the two lasers The displacement sensor rotates relatively, and the rotation driving mechanism includes a turntable for carrying the bearing ring to be tested, and the turntable is driven to rotate by a motor. 4. The non-contact bearing ring outer diameter measuring device according to claim 3, characterized in that: the measuring device also includes an angular displacement encoder for controlling the rotation of the turntable at an interval setting angle, and the angular displacement encoder and The motor control connection. 5. The non-contact bearing ring outer diameter measuring device according to claim 1 or 2, characterized in that: the measuring device also includes a drive sensor mounting frame with two laser displacement sensors moving axially along the bearing ring. An adjustment mechanism and an axial detector for detecting the axial displacement of the two laser displacement sensors along the bearing ring. 6. The device for measuring the outer diameter of a non-contact bearing ring according to claim 5, characterized in that: the measuring device also includes a device for driving the sensor mounting frame with two laser displacement sensors along a plane perpendicular to the axial direction of the bearing ring A moving radial adjustment mechanism, and a radial detector for detecting the displacement of the two laser displacement sensors driven by the radial adjustment mechanism. 7. The device for measuring the outer diameter of a non-contact bearing ring according to claim 1 or 2, wherein the measuring device includes a data receiving and processing module for connecting with the signal output terminals of the two laser displacement sensors.