High-precision contact type measuring system for critical dimension of train wheel

Abstract

A train wheel critical dimension high-precision contact type measuring system comprises a measuring table, a track is arranged on the measuring table, a measuring vehicle is arranged on the track, a measuring mechanism is fixed in the middle of the measuring table, and the measuring vehicle is connected with a driving part chain conveyor of the measuring vehicle. Compared with the prior art, the utility model has the technical effects that the measuring vehicle is arranged on the track, and the high-efficiency and high-precision on-line measurement of the critical dimension of the wheel is realized through the movement of the measuring vehicle.

Description

TECHNICAL FIELD

[0001] The utility model belongs to train wheel measurement technical field, specifically relates to a kind of train wheel key size high-precision contact type measurement system. BACKGROUND

[0002] In the environment with speed up to 300 kilometers per hour or even higher, high-speed rail wheel needs to withstand high temperature, friction, metal fatigue, and any tiny flaw can cause safety accidents. Therefore, the manufacturing of high-speed rail wheel is almost harsh to material, process and quality control requirements.

[0003] Railway transportation is the artery of national economy, and its safety and efficiency are crucial. As the key component of train running, the correctness of wheel geometry directly affects the safety of train running, so the measurement and detection of wheel geometry are particularly important.

[0004] Referring to Figure 1 The table below, the measurement data is more.

[0005]

[0006] Traditional detection method cannot meet the rapid, efficient and accurate detection requirement. The traditional detection method has the following shortcomings:

[0007] 1. Low efficiency: relying on manual visual inspection, slow speed, cannot meet the large-scale, high-frequency detection requirement.

[0008] 2. Lack of accuracy: limited by human eye and experience, large error, may cause safety hazard. INVENTION CONTENTS

[0009] The technical problem to be solved by the utility model: how to design a train wheel key size high-precision contact type measurement system, to realize the flow line of measurement.

[0010] The technical scheme of the utility model is specifically:

[0011] A train wheel key size high-precision contact type measurement system, comprising a measuring table, a track is provided on the measuring table, a measuring car is provided on the track, a measuring mechanism is fixed in the middle of the measuring table, and the measuring car is connected with a chain conveyor of its driving part.

[0012] The measuring car is connected with a tray through a car body lifting hydraulic cylinder, the car body lifting hydraulic cylinder is used to control the lifting of the tray, the lower surface of the tray is connected with an X-axis clamp, and the X-axis direction is the direction of the track.

[0013] The upper surface of the tray is provided with a spring plate in the middle, the upper surface of the spring plate is a non-deformation surface, and the periphery of the spring plate is provided with at least three positioning columns, the upper surfaces of the positioning columns are located in a horizontal plane.

[0014] The upper surface of the tray is provided with a spring plate in the middle, the upper surface of the spring plate is a non-deformation surface, and the periphery of the spring plate is provided with at least three positioning columns, the upper surfaces of the positioning columns are located in a horizontal plane.

[0015] The measuring mechanism comprises a connecting frame fixed on the measuring table, a motor fixed on the connecting frame, a cylinder body end of an adjusting hydraulic cylinder fixed on an output shaft of the motor, a piston end of the adjusting hydraulic cylinder fixed on a measuring frame, a plurality of sensors located in a horizontal plane on the measuring frame, i.e., a second sensor, a third sensor, a fourth sensor, a fifth sensor, a sixth sensor, a seventh sensor and an eighth sensor, the second sensor located at a lower part of an edge of the connecting frame, the third sensor located at a corresponding position of a wheel hub hole center, the fifth sensor and the seventh sensor arranged at corresponding positions of wheel spoke measurement, the sixth sensor arranged at a corresponding position of the wheel hub hole center, and the eighth sensor arranged at a corresponding position of a wheel hub end surface; an upper line laser sensor is arranged on the measuring frame, and a lower line laser sensor is arranged below the upper line laser sensor, the lower line laser sensor being fixed on the tray, and the upper line laser sensor and the lower line laser sensor being arranged face to face at the corresponding positions of the wheel spoke measurement.

[0016] The measuring table is provided with three workstations parallel to each other and arranged in the Y-axis direction, i.e., a first workstation, a second workstation and a third workstation, each of the workstations is provided with a measuring vehicle, a measuring table and a measuring mechanism, one of the workstations is a working workstation, and the other two workstations are standby workstations.

[0017] Compared with the prior art, the technical effect of the utility model is that the measuring vehicle is arranged on the track, and through the movement of the measuring vehicle, efficient and high-precision online measurement of the key size of the wheel is realized. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic view of the prior art.

[0019] Figure 2 is a schematic view of the utility model.

[0020] Figure 3 is a top view of the utility model.

[0021] Figure 4 is an enlarged schematic view of the measuring frame. DETAILED DESCRIPTION

[0022] The utility model will be described in detail below in combination with the drawings and the specific implementation.

[0023] As Figures 2-4A high-precision contact measurement system for key dimensions of a train wheel, comprising a measurement table 12, a track 10 arranged on the measurement table 12, a measurement vehicle 11 arranged on the track 10, a measurement mechanism 20 fixed to the middle of the measurement table 12, and a chain conveyor connected to the driving member of the measurement vehicle 11.

[0024] As Figure 4 The measurement vehicle 11 is connected to a tray 13 through a vehicle body lifting hydraulic cylinder, the vehicle body lifting hydraulic cylinder is used for controlling the lifting of the tray 13, the upper surface of the middle of the tray 13 is provided with a spring plate 18, the upper surface of the spring plate 18 is a non-deformation surface, at least three positioning columns 15 are arranged around the spring plate 18, the upper surfaces of the positioning columns 15 are located in a horizontal plane, and the lower surface of the tray 13 is connected to an X-axis clamp 14, the X-axis direction is the direction of the track 10.

[0025] The measurement mechanism 20 comprises a connecting frame 21 fixed to the measurement table 12, a motor 22 fixed to the connecting frame 21, a cylinder body end of an adjusting hydraulic cylinder 23 fixed to the output shaft of the motor 22, a piston end of the adjusting hydraulic cylinder 23 fixed to a measurement frame 24, and a plurality of sensors located in a horizontal plane arranged on the measurement frame 24, i.e., a second sensor 32, a third sensor 33, a fourth sensor (the measurement line thereof is shown as line A 34), a fifth sensor (the measurement line thereof is shown as line B 35), a sixth sensor (the measurement line thereof is shown as line C 36), a seventh sensor (the measurement line thereof is shown as line D 37), and an eighth sensor (the measurement line thereof is shown as line E 38), the second sensor 32 is located at the lower part of the edge of the connecting frame 21, the third sensor is located at the corresponding position of the center of the wheel hub hole, the fifth sensor and the seventh sensor are arranged at the corresponding positions of the wheel spoke measurement, the sixth sensor is arranged at the corresponding position of the center of the wheel hub hole, and the eighth sensor is arranged at the corresponding position of the wheel hub end surface.

[0026] The measurement frame 24 is provided with an upper line laser sensor 171, and a lower line laser sensor 172 is arranged below the upper line laser sensor 171, the lower line laser sensor 172 is fixed to the tray 13, and the upper line laser sensor 171 and the lower line laser sensor 172 are arranged face to face at the corresponding positions of the wheel spoke measurement.

[0027] The upper surface of the tray 13 is fixed with a protection column 16 to prevent the connecting frame 21 from falling excessively.

[0028] As Figure 3 In order to facilitate use, three workstations parallel to each other and arranged according to the Y-axis direction are arranged on the measurement table 12, i.e., a first workstation 100, a second workstation 200, and a third workstation 300, each workstation is provided with one measurement vehicle 11, one measurement table 12, and one measurement mechanism 20, one of the workstations is a use workstation, and the other two workstations are standby workstations.

[0029] The working principle is as follows:

[0030] comprising the following steps:

[0031] S10, the measuring vehicle 11 moves to the right side of the to-be-measured station, and the upstream manipulator 92 places the to-be-measured wheel (hereinafter referred to as the workpiece 90) on the measuring vehicle 11 of the to-be-measured station, specifically: the workpiece 90 is placed at the center position of the elastic plate 18, and at the same time, the rim of the workpiece 90 is pressed on the positioning column 15, and finally the X-axis clamp 14 is pressed tightly.

[0032] S20, the measuring vehicle 11 moves to the lower side of the measuring mechanism 20, that is, the measuring station.

[0033] S30, the measuring vehicle 11 lifts the tray 13 through the vehicle body lifting hydraulic cylinder.

[0034] S40, the piston end of the hydraulic cylinder 23 is extended to drive the measuring frame 24 to fall to the measuring reference surface position (that is, the second sensor 32, the third sensor 33, the fourth sensor, the fifth sensor, the sixth sensor, the seventh sensor and the eighth sensor are all located on the measuring reference surface), and the protection column 16 can prevent the connecting frame 21 from falling excessively.

[0035] S50, the M2, M5, M7, M12, S1, S2, M8 and other size measurements are performed, specifically including steps S51-S56.

[0036] S51, the tread diameter M2 of the workpiece is measured by the second sensor 32, the output shaft of the motor 22 is rotated to drive the measuring frame 24 and the second sensor 32 to rotate synchronously, and the multi-position M2 size measurement is realized, thereby improving the reliability of the measurement.

[0037] S52, the distance d1 between the upper surface of the elastic plate 18 (that is, the lower surface of the hub) and the measuring reference surface is measured by the sixth sensor (its measurement circuit is shown in circuit C36), and the distance d2 between the upper surface of the hub and the measuring reference surface is measured by the eighth sensor (its measurement circuit is shown in circuit E38), and the difference between d1 and d2 is the wheel hub length M7.

[0038] S53, the wheel hole inner diameter M5 is measured by the third sensor 33, the output shaft of the motor 22 is rotated to drive the measuring frame 24 and the second sensor 32 to rotate synchronously, and the multi-position measurement of the wheel hole diameter M5 is realized, thereby improving the reliability of the measurement.

[0039] S54, the distance d3 between the upper surface of the rim and the measuring reference surface is measured by the fourth sensor (its measurement circuit is shown in circuit A34), and the distance d4 between the upper surface of the positioning column 15 and the measuring reference surface is measured by the fourth sensor in advance, and the difference between d3 and d4 is the wheel rim width M12.

[0040] S55, the measurement of wheel size S1 and S2 is realized by the fifth sensor (its measured line refers to line B35), the seventh sensor (its measured line refers to line D37) and the upper line laser sensor 171 and the lower line laser sensor 172.

[0041] S56, the measurement of wheel rim hub distance M8 can be realized by the difference between d1 and d4.

[0042] S60, the piston end of the hydraulic cylinder 23 is retracted, and the measuring frame 24 is driven to return to the initial position.

[0043] S70, the measuring vehicle 11 drives the tray 13 to return to the initial position through the vehicle body lifting hydraulic cylinder.

[0044] S80, the measuring vehicle 11 moves to the left side of the departure station, and the downstream manipulator 91 grabs the workpiece 90 away from the system and enters the downstream link.

[0045] The features of the present application are:

[0046] S1, the wheel key size detection system can adapt to the detection work of various specifications of wheels, but the switching of wheel specifications needs to calibrate and adjust the system, in order to improve the production efficiency, the wheel changing system is designed in the present system, including two preparation stations and a detection station, wherein the two preparation stations are located on both sides of the detection station. The system needs to cooperate with two sets of chain conveying systems and two sets of wheel key size detection systems, wherein one set of chain conveying system and one set of wheel key size detection system are assembled into No. 1 detection device, and the other set of chain conveying system and the wheel key size detection system are assembled into No. 2 detection device. The detection station is used for the detection work of the wheels produced by the current production line, and the preparation station is used for adjusting and calibrating the wheel key size detection system in advance according to the need of switching the production of wheels.

[0047] S2, the high-precision contact type measurement system of the train wheel key size realizes the efficient and high-precision online measurement of the wheel key size through the wheel key size detection system, the chain conveying system and the wheel changing system, and achieves the following effects: the size measurement accuracy is ±0.02 mm; the measurement beat is less than or equal to 1 min, and the changing time is less than or equal to 20 min (the changing does not affect the production beat); the standard gauge block can be used for calibration; the detection data can be traced; and seamless connection with upstream and downstream production lines is realized.

[0048] Other contents refer to the prior art.

[0049] The above is only the preferred embodiment of the present application, and it should be pointed out that for those skilled in the art, without departing from the overall concept of the present application, some changes and improvements can be made, which should also be regarded as the protection range of the present application.

Claims

1. A high-precision contact measurement system for key dimensions of train wheels, comprising a measuring platform (12), characterized in that: The measuring platform (12) is equipped with a track (10), and the track (10) is equipped with a measuring vehicle (11). The measuring mechanism (20) is fixed in the middle of the measuring platform (12), and the measuring vehicle (11) is connected to its driving component chain conveyor.

2. The high-precision contact measurement system for key dimensions of train wheels as described in claim 1, characterized in that: The measuring vehicle (11) is connected to the pallet (13) via the vehicle body lifting hydraulic cylinder. The vehicle body lifting hydraulic cylinder is used to control the lifting of the pallet (13). The lower surface of the pallet (13) is connected to the X-axis clamp (14). The X-axis direction is the direction of the track (10).

3. The high-precision contact measurement system for key dimensions of train wheels as described in claim 2, characterized in that: The upper surface of the tray (13) is provided with a spring plate (18) in the middle. The upper surface of the spring plate (18) is a non-deformable surface. At least three positioning posts (15) are provided around the spring plate (18). The upper surfaces of these positioning posts (15) are located in a horizontal plane.

4. The high-precision contact measurement system for key dimensions of train wheels as described in claim 3, characterized in that: The upper surface of the tray (13) is fixed with a protective column (16).

5. The high-precision contact measurement system for key dimensions of train wheels as described in claim 1, characterized in that: The measuring mechanism (20) includes a connecting frame (21), which is fixed on the measuring table (12). A motor (22) is fixed on the connecting frame (21). The output shaft of the fixed motor (22) is fixed to the cylinder end of the adjusting hydraulic cylinder (23). The piston end of the adjusting hydraulic cylinder (23) is fixed to the measuring frame (24). The measuring frame (24) is equipped with multiple sensors located in a horizontal plane: a second sensor (32), a third sensor (33), a fourth sensor, a fifth sensor, a sixth sensor, a seventh sensor, and an eighth sensor. The second sensor (32) is located at the lower edge of the connecting frame (21). The third sensor... The sensor is located at the corresponding position of the center of the wheel hub hole. The fifth and seventh sensors are set at the corresponding positions of the wheel spoke measurement. The sixth sensor is set at the corresponding position of the center of the wheel hub hole. The eighth sensor is set at the corresponding position of the wheel hub end face. The measuring frame (24) is equipped with an upper line laser sensor (171). Below the upper line laser sensor (171) is a lower line laser sensor (172). The lower line laser sensor (172) is fixed on the tray (13). The upper line laser sensor (171) and the lower line laser sensor (172) are set face to face at the corresponding positions of the wheel spoke measurement.

6. The high-precision contact measurement system for key dimensions of train wheels as described in claim 5, characterized in that: The measuring table (12) has three parallel workstations arranged in the Y-axis direction: the first workstation (100), the second workstation (200), and the third workstation (300). Each workstation is equipped with a measuring cart (11), a measuring table (12), and a measuring mechanism (20). One of them is the workstation in use, and the other two are the backup workstations.

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