Bearing ring inner and outer diameter detection device and application thereof

Abstract

The invention relates to a bearing ring inner and outer diameter detection device and application thereof. The bearing ring inner and outer diameter detection device comprises a detection rack, a detection platen and a measuring head, a motor is arranged at the top of the detection rack, the output end of the motor is connected with a lead screw sliding block transmission mechanism, the measuring head is connected with the lead screw sliding block transmission mechanism through a fixing frame, the detection platen is located below the measuring head and driven by a telescopic mechanism to move front and back, and a standard workpiece can be placed below the detection platen and used for calibrating the measuring head. According to the invention, the standard workpiece is used for calibrating and positioning the measuring head, the detection operation of the to-be-detected workpiece can be completed through one-time calibration, the frequent calibration of the measuring head is avoided, and the detection efficiency and the detection accuracy are greatly improved. A standard workpiece is used as a detection reference object, error accumulation caused by numerical measurement of workpieces to be detected one by one is avoided, and the detection accuracy is higher. The calibration opportunity of the measuring head can be set through the PLC, the measuring head can be calibrated again after a certain number of workpieces to be detected are detected, and the accuracy of continuous detection of the measuring head is guaranteed.

Description

Technical Field

[0001] This invention relates to a bearing ring inner and outer diameter testing device and its application, belonging to the technical field of testing equipment. Background Technology

[0002] The accuracy of the inner and outer diameters of bearing rings directly affects the overall quality of the bearing. Different bearings require different inner and outer diameters, but all must maintain these parameters within a certain error range; otherwise, they must be scrapped. Currently, after the bearing rings are manufactured, they are generally checked manually to ensure the verticality of the inner and outer diameters meets the requirements. If the error range is too large, they are scrapped. However, manually checking each bearing ring individually is time-consuming, labor-intensive, and extremely inefficient.

[0003] Currently, there are already devices on the market that can automatically detect the outer diameter of bearing rings. For example, Chinese patent document CN210346639U discloses a fully automatic bearing ring outer diameter testing machine, including a machine body with a feeding conveyor belt on the machine body. A platform is provided at the end of the feeding conveyor belt, and a feeding pusher is provided on the feeding conveyor belt to push the bearing from the feeding conveyor belt to the platform. The feeding pusher is pushed forward by a feeding pusher cylinder. A material transfer mechanism is provided on one side of the platform. An outer diameter measuring mechanism and a defective product unloading mechanism are arranged sequentially on the platform. In this patent solution, the left and right claws of the measuring jaws are mounted on the measuring head using spring plates. When the left and right claws descend, they are blocked by the outer ring of the bearing, resulting in a left-right movement. The displacement parameters are captured by a position sensor mounted on the left claw and passing through the auxiliary plate of the right claw. This has a significant speed advantage compared to using a two-finger cylinder for detection.

[0004] However, most existing automatic bearing ring inner and outer diameter testing equipment uses sensors to directly obtain inner and outer diameter values, and then judges whether the bearing ring is qualified by judging whether the inner and outer diameter values ​​meet the numerical range required by the process. This process is relatively inefficient and has the problem of error accumulation, which can easily cause large deviations in subsequent measurement values. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an improved bearing ring inner and outer diameter detection device. This device does not directly obtain the inner and outer diameter values ​​of the bearing ring. Instead, it uses a standard bearing as a reference and uses a probe to compare the bearing ring to be tested with the reference. Bearing rings that differ significantly from the reference are discarded, greatly improving inspection efficiency and avoiding the accumulation of errors caused by direct measurement, resulting in higher inspection accuracy.

[0006] The present invention also provides a method for operating a bearing ring inner and outer diameter detection device.

[0007] The technical solution of the present invention is as follows:

[0008] A bearing ring inner and outer diameter testing device includes a testing frame, a testing plate, and a probe. A motor is installed on the top of the testing frame, and the output end of the motor is connected to a lead screw and slider transmission mechanism. The probe is connected to the lead screw and slider transmission mechanism through a fixed frame. The testing plate is located below the probe and is driven to move back and forth by a telescopic mechanism. A standard workpiece can be placed under the testing plate for probe calibration.

[0009] Preferably, the detection device has at least two probes arranged side by side. The advantage of this design is that the detection device can meet different detection requirements by adding multiple probes, and can simultaneously detect the inner diameter or outer diameter, thus improving detection efficiency.

[0010] Preferably, the testing stand is convex ("U"-shaped). The advantage of this design is that the convex-shaped stand has good stability, ensuring the accuracy of the probe's detection.

[0011] Preferably, the bottom of the testing platform is provided with two parallel slide rails, and the testing platform is slidably connected to the slide rails.

[0012] Preferably, the telescopic mechanism includes a cylinder, a hydraulic cylinder, or an electric push rod.

[0013] Preferably, the telescopic mechanism is a rodless cylinder. The advantage of this design is that the rodless cylinder is compact and can meet the requirements of working in confined spaces.

[0014] Preferably, the motor includes a servo motor or a stepper motor.

[0015] Preferably, the fixing frame is an L-shaped bracket, and the probe is fixedly installed at the bottom of the L-shaped bracket.

[0016] Preferably, the probe includes an inner diameter probe, an outer diameter probe, or a combination of an inner diameter probe and an outer diameter probe.

[0017] Preferably, the front side of the testing platform is provided with a vertical slide rail, and the fixing frame is connected to the vertical slide rail by a slider.

[0018] Preferably, the detection device further includes a feeding mechanism, which includes a feeding cylinder, a clamping cylinder, grippers, connecting rods, a transverse guide rail, and front and rear guide rails. The ends of each pair of grippers are connected to two parallel connecting rods, one end of which is driven by the clamping cylinder. The bottom end of the connecting rod is connected to a transverse slider, which is mounted on the transverse guide rail and driven by the feeding cylinder. The bottom end of the transverse guide rail is connected to a front and rear slider, which is mounted on the front and rear guide rails and driven by a pushing cylinder.

[0019] Preferably, the detection device further includes a sorting mechanism, which includes a lifting cylinder, a sorting plate, and a pulling cylinder; the sorting plate is provided with two round holes, the pulling cylinder is disposed on the sorting plate and located between the two round holes, the piston rod of the pulling cylinder is connected to a plate, and the lifting cylinder is located directly below the round holes and the piston rod of the lifting cylinder is connected to a tray.

[0020] Preferably, the detection device further includes a material conveying mechanism, which is a belt conveyor driven by a motor.

[0021] Preferably, the detection device further includes an industrial control computer, and the motor, telescopic mechanism, probe, feeding cylinder, clamping cylinder, pushing cylinder, lifting cylinder and pulling cylinder are all driven and controlled by the industrial control computer.

[0022] A method for operating a bearing ring inner and outer diameter testing device includes the following steps:

[0023] 1) Place the standard workpiece under the inspection platform. At this time, the inspection platform is not pulled out. The probe descends and contacts the standard workpiece to calibrate and position the probe. Then the probe is raised over the inspection platform.

[0024] 2) The testing platform is pulled out by the telescopic mechanism, at which point the testing platform is located between the probe and the standard workpiece;

[0025] 3) The workpieces to be tested are continuously transported from the material conveying mechanism, and the loading mechanism picks up the workpieces to be tested from the material conveying mechanism and places them on the testing platform in sequence;

[0026] 4) The probe descends to measure the inner and outer diameters of the workpiece. After the measurement is completed, the probe rises.

[0027] 5) The feeding mechanism picks up the next workpiece to be tested from the conveying mechanism and places it on the testing platform; at the same time, the feeding mechanism picks up the workpiece that has been tested on the testing platform and places it on the tray of the lifting cylinder.

[0028] 6) For workpieces that fail inspection, the lifting cylinder raises the workpiece to the top of the round hole, and then the pulling cylinder moves the plate, which pulls the workpiece onto the sorting plate.

[0029] 7) Repeat steps 3)-6) to complete the inspection of each workpiece.

[0030] Preferably, the working method further includes a probe recalibration step: after testing 50 or 100 workpieces, the testing platform is pushed inward by the telescopic mechanism, and the probe descends again to contact the standard workpiece to achieve probe calibration and positioning. After calibration and positioning are completed, the probe rises, and the testing platform is pulled out again by the telescopic mechanism.

[0031] Technical features and beneficial effects of the present invention:

[0032] 1. The detection device of the present invention uses a standard workpiece for probe calibration and positioning. The detection operation of the workpiece to be tested can be completed in one calibration, avoiding frequent probe calibration and greatly improving detection efficiency and accuracy.

[0033] 2. The detection device of this invention uses a standard workpiece as a reference for detection, avoiding the accumulation of errors caused by numerical measurement of each workpiece individually, thus achieving higher detection accuracy. The PLC can also be used to set the calibration timing of the probe; after detecting a certain number of workpieces, the probe can be recalibrated to ensure the accuracy of continuous detection. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the detection device of the present invention;

[0035] Figure 2 This is a schematic diagram of the working state of the detection device of the present invention. Figure I ;

[0036] Figure 3 This is a schematic diagram of the working state of the detection device of the present invention. Figure II ;

[0037] Figure 4 This is a schematic diagram of the working state of the detection device of the present invention. Figure III ;

[0038] In the diagram: 1-Motor, 2-Motor, 3-Testing stand, 4-Upright plate, 5-Testing platform, 6-Slide rail, 7-Standard workpiece, 8-Outer diameter probe, 9-Telescopic mechanism, 10-Standard workpiece, 11-Inner diameter probe, 12-Fixed frame, 13-Motor, 14-Belt conveyor, 15-Feeding cylinder, 16-Transverse slider, 17-Transverse guide rail, 18-Pull-away cylinder, 19-Sorting plate, 20-Connecting rod, 21-Clamping cylinder, 22-Gripper, 23-Front and rear guide rails, 24-Front and rear sliders, 25-Lifting cylinder, 26-Support plate, 27-Base plate, 28-Plate, 29-Workpiece to be tested. Detailed Implementation

[0039] The present invention will be further described below with reference to the embodiments and accompanying drawings, but is not limited thereto.

[0040] Example 1:

[0041] like Figure 1As shown in the figure, this embodiment provides a device for detecting the inner and outer diameters of a bearing ring, which includes a detection bench 3, a detection table board 5, and a probe; a motor 1, 2 is arranged on the top of the detection bench 3, the output end of the motor is connected with a screw rod slider transmission mechanism, the probe is connected with the screw rod slider transmission mechanism through a fixing bracket 12, the detection table board 5 is located below the probe, and the detection table board is driven by a telescopic mechanism 9 to move back and forth. Standard workpieces 7, 10 can be placed below the detection table board 5 for calibrating the probe.

[0042] Specifically, the detection bench 3 is in a "convex" shape and is connected by a plurality of vertical plates 4. The "convex" shaped bench has good stability and can ensure the accuracy of the probe detection. In this embodiment, two probes are installed on the detection bench, one inner diameter probe 11 and one outer diameter probe 8, which can not only detect the inner diameter of the workpiece to be measured 29 but also detect the outer diameter of the workpiece to be measured. The two probes can both be inner diameter probes or outer diameter probes, which can improve the detection efficiency. Workers can install the type of probe according to the detection requirements. In addition, the probes 8, 11 are commercially available mature products and can be directly purchased and installed on the fixing bracket 12.

[0043] Two parallel slide rails 6 are arranged at the bottom of the detection bench 3, and the detection table board 5 is slidably connected to the slide rails 6. The detection table board 5 is pulled back and forth by the telescopic mechanism 9. After the detection table board 5 is pushed inwards, the probe can be calibrated and positioned through the standard workpiece. After the detection table board 5 is pulled out, the workpiece to be measured 29 can be placed on the detection table board 5 for detection by the probe. In this embodiment, the telescopic mechanism 9 selects a rodless cylinder, and the rodless cylinder has a small volume and can meet the requirements of small-space operation.

[0044] The motors 1, 2 select servo motors, and can also be replaced by stepping motors. The two motors are installed on the top of the detection bench 3. The motors 1, 2 are connected to drive the screw rod slider transmission mechanism. The fixing bracket 12 is connected to the screw rod slider transmission mechanism. The screw rod is rotated by the motors 1, 2, and at the same time, the screw rod slider and the fixing bracket 12 are moved up and down.

[0045] The fixing bracket 12 is an L-shaped bracket. The probe is fixedly arranged at the bottom of the L-shaped bracket. The back of the L-shaped bracket is fixedly connected to the screw rod slider through bolts. The L-shaped bracket is convenient for replacing the probe. One probe is installed on one L-shaped bracket, and the two probes are respectively installed on two L-shaped brackets. For different detection process requirements, the probe can be directly replaced on the L-shaped bracket. The two L-shaped brackets can install two inner diameter probes or two outer diameter probes at the same time, or one L-shaped bracket installs an inner diameter probe and the other L-shaped bracket installs an outer diameter probe. In this embodiment, one L-shaped bracket installs the inner diameter probe 11, and the other L-shaped bracket installs the outer diameter probe 8.

[0046] The testing device also includes a feeding mechanism, which automatically picks up the workpieces 29 to be tested one by one onto the testing station of the testing platform 5, and simultaneously picks up the tested workpieces from the testing station. In this embodiment, the feeding mechanism includes a feeding cylinder 15, a clamping cylinder 21, a gripper 22, a connecting rod 20, a transverse guide rail 17, and front and rear guide rails 23. The ends of each pair of grippers 22 are respectively connected to two parallel connecting rods 20. One end of the two parallel connecting rods 20 is connected to and driven by the clamping cylinder 21. When the clamping cylinder 21 operates, it causes the connecting rod 20 connected to the piston rod to move, so that the gripper 22 clamps the workpiece 29 to be tested. The bottom end of the connecting rod 20 is connected to a horizontal slider 16, which is mounted on the horizontal guide rail 17 and driven by the feeding cylinder 15; the bottom end of the horizontal guide rail 17 is connected to a front and rear slider 24, which is mounted on the front and rear guide rails 23 and driven by a pushing cylinder (not shown in the figure).

[0047] The testing device also includes a sorting mechanism, which is mainly designed for the classification and collection of defective workpieces after testing. In this embodiment, the sorting mechanism includes a lifting cylinder 25, a sorting plate 19, and a pulling cylinder 18. The sorting plate 19 has two circular holes. The pulling cylinder 18 is installed on the sorting plate 19 and located between the two circular holes. The piston rod of the pulling cylinder 18 is connected to a flat plate 28. The lifting cylinder 25 is located directly below the circular holes, and its piston rod is connected to a tray. One circular hole is used to collect workpieces with unqualified outer diameters, and the other circular hole is used to collect workpieces with unqualified inner diameters. The lifting cylinder 25 lifts the inspected defective workpieces upwards and through the upper circular hole. Then, the pulling cylinder 18 pulls the flat plate 28, which pushes the defective workpieces into the waste bin.

[0048] The testing device also includes an industrial control computer (not shown in the figure). The entire testing device is controlled by the industrial control computer and requires no human intervention. After the testing program is set, the testing device will run automatically. The motor, telescopic mechanism, probe, feeding cylinder, clamping cylinder, pushing cylinder, lifting cylinder, and pulling cylinder are all driven and controlled by the industrial control computer.

[0049] Example 2:

[0050] A bearing ring inner and outer diameter detection device, with the structure as described in Example 1, except that the telescopic mechanism 9 is a hydraulic cylinder.

[0051] Example 3:

[0052] A bearing ring inner and outer diameter detection device, with the structure described in Example 1, differs in that the telescopic mechanism 9 is an electric push rod.

[0053] Example 4:

[0054] A bearing ring inner and outer diameter testing device, with the structure described in Embodiment 1, differs in that: a vertical slide rail is arranged parallel to the front side of the testing platform 3, and the vertical ends of the fixed frame 12 are connected to the vertical slide rail via sliders. This design enhances the stability of the fixed frame during its up-and-down movement driven by the screw-slider transmission mechanism, ensuring the accuracy of the probe testing.

[0055] Example 5:

[0056] A bearing ring inner and outer diameter testing device, with the structure described in Embodiment 1, differs in that: the testing device further includes a material conveying mechanism, which is a belt conveyor 14 driven by a motor 13. The belt conveyor 14 is located on one side of the testing platform 3, as shown below. Figure 2 As shown, the material handling arm 22 of the feeding mechanism can continuously grip the workpieces 29 to be tested from the belt conveyor, thus improving work efficiency.

[0057] Example 6:

[0058] A method for operating a bearing ring inner and outer diameter detection device, utilizing the detection device described in Example 5, includes the following specific steps:

[0059] 1) Place standard workpieces 7 and 10 below the inspection platform 5. At this time, the inspection platform 5 is not pulled out. The probes 8 and 11 descend to contact the standard workpieces 7 and 10, and the probes 8 and 11 are calibrated and positioned. Then the probes are raised above the inspection platform.

[0060] 2) The testing platform 5 is pulled out by the telescopic mechanism 9. At this time, the testing platform 5 is located between the probes 8 and 11 and the standard workpieces 7 and 10, which is the testing station of the workpiece to be tested.

[0061] 3) The workpiece 29 to be tested is continuously transported from the belt conveyor 14. The feeder 22 of the feeding mechanism picks up the workpiece 29 to be tested from the belt conveyor 14 and places it on the testing platform 5 in sequence.

[0062] 4) Probes 8 and 11 descend to inspect the inner and outer diameters of each workpiece 29 to be tested. After the inspection is completed, probes 8 and 11 rise.

[0063] 5) The feeding mechanism picks up the subsequent workpieces to be tested from the conveying mechanism and places them one after another on the testing platform 5. The feeding mechanism moves one station at a time. At the same time, the feeding mechanism picks up the workpieces that have been tested on the testing platform 5 and places them on the tray of the lifting cylinder 25.

[0064] 6) For workpieces that fail the inspection, the lifting cylinder 25 lifts up and pushes the workpieces above the round hole. Then, the pulling cylinder 18 moves the plate 28, which pulls the workpieces onto the sorting plate 19, and finally pushes them into the waste basket.

[0065] If the workpiece passes inspection, the lifting cylinder 25 does not operate. When the next workpiece after inspection is picked up by the feeding mechanism and placed on the lifting cylinder, it is directly pushed down into the finished product basket by the grabber 22.

[0066] 7) Repeat steps 3)-6) to complete the inspection of each workpiece.

[0067] The entire process described above is driven and controlled by an industrial computer, requiring no human intervention. Furthermore, depending on the testing process requirements, only the inner diameter or only the outer diameter can be tested. The testing program is pre-set in the industrial computer, enabling automated operation upon startup.

[0068] Example 7:

[0069] A working method for a bearing ring inner and outer diameter detection device, the operation process is as described in Example 6, the difference being that the working method also includes a probe recalibration step: after detecting 50 or 100 workpieces to be tested (the specific number can be set by the worker based on experience), the detection platform 5 is pushed inward by the telescopic mechanism 9, and the probes 8 and 11 descend again to contact the standard workpieces 7 and 10 to achieve probe calibration and positioning. After calibration and positioning are completed, the probes rise, and the detection platform 5 is pulled out again by the telescopic mechanism 9.

[0070] The above description is merely a specific embodiment of the present invention, and the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for detecting the inner and outer diameters of bearing rings, characterized in that, It includes a testing frame, a testing plate, and a probe; a motor is installed on the top of the testing frame, and the output end of the motor is connected to a lead screw and slider transmission mechanism. The probe is connected to the lead screw and slider transmission mechanism through a fixed frame. The testing plate is located below the probe and is driven to move back and forth by a telescopic mechanism. A standard workpiece can be placed under the testing plate for probe calibration.

2. The bearing ring inner and outer diameter detection device as described in claim 1, characterized in that, The detection device has at least two probes arranged side by side.

3. The bearing ring inner and outer diameter detection device as described in claim 1, characterized in that, The bottom of the testing platform is provided with two parallel slide rails, and the testing platform is slidably connected to the slide rails.

4. The bearing ring inner and outer diameter detection device as described in claim 1, characterized in that, The telescopic mechanism includes a pneumatic cylinder, a hydraulic cylinder, or an electric push rod.

5. The bearing ring inner and outer diameter detection device as described in claim 4, characterized in that, The telescopic mechanism uses a rodless cylinder.

6. The bearing ring inner and outer diameter detection device as described in claim 1, characterized in that, The probe includes an inner diameter probe, an outer diameter probe, or a combination of an inner diameter probe and an outer diameter probe.

7. The bearing ring inner and outer diameter detection device as described in claim 1, characterized in that, The detection device also includes a feeding mechanism, which includes a feeding cylinder, a clamping cylinder, grippers, connecting rods, a transverse guide rail, and front and rear guide rails. The ends of each pair of grippers are connected to two parallel connecting rods. One end of the two parallel connecting rods is driven by the clamping cylinder. The bottom end of the connecting rod is connected to a transverse slider, which is set on the transverse guide rail and driven by the feeding cylinder. The bottom end of the transverse guide rail is connected to a front and rear slider, which is set on the front and rear guide rails and driven by a pushing cylinder.

8. The bearing ring inner and outer diameter detection device as described in claim 7, characterized in that, The detection device also includes a sorting mechanism, which includes a lifting cylinder, a sorting plate, and a pulling cylinder. The sorting plate has two round holes, and the pulling cylinder is set on the sorting plate and located between the two round holes. The piston rod of the pulling cylinder is connected to a plate, and the lifting cylinder is located directly below the round holes and its piston rod is connected to a tray.

9. The bearing ring inner and outer diameter detection device as described in claim 8, characterized in that, The detection device also includes an industrial control computer, and the motor, telescopic mechanism, probe, feeding cylinder, clamping cylinder, pushing cylinder, lifting cylinder and pulling cylinder are all driven and controlled by the industrial control computer.

10. A method for operating the bearing ring inner and outer diameter testing device as described in any one of claims 1-9, characterized in that, Includes the following steps: 1) Place the standard workpiece under the inspection platform. At this time, the inspection platform is not pulled out. The probe descends and contacts the standard workpiece to calibrate and position the probe. Then the probe is raised over the inspection platform. 2) The testing platform is pulled out by the telescopic mechanism, at which point the testing platform is located between the probe and the standard workpiece; 3) The workpieces to be tested are continuously transported from the material conveying mechanism, and the loading mechanism picks up the workpieces to be tested from the material conveying mechanism and places them on the testing platform in sequence; 4) The probe descends to measure the inner and outer diameters of the workpiece. After the measurement is completed, the probe rises. 5) The feeding mechanism picks up the next workpiece to be tested from the conveying mechanism and places it on the testing platform; at the same time, the feeding mechanism picks up the workpiece that has been tested on the testing platform and places it on the tray of the lifting cylinder. 6) For workpieces that fail inspection, the lifting cylinder raises the workpiece to the top of the round hole, and then the pulling cylinder moves the plate, which pulls the workpiece onto the sorting plate. 7) Repeat steps 3)-6) to complete the inspection of each workpiece.

Images