Workpiece thread detection device

Abstract

The utility model discloses a workpiece thread detection device, which comprises a detection table, a rotating shaft, a pneumatic motor, an inductor and a controller, the detection table is provided with a shaft hole matched with the rotating shaft, the rotating shaft is vertically arranged in the shaft hole, the top of the rotating shaft is connected with a connecting rod through a chuck, and the top of the connecting rod is fixedly provided with a thread go gauge. The pneumatic motor is arranged at the bottom of the detection table, the pneumatic motor is connected with the rotating shaft through a transmission assembly to drive the rotating shaft to rotate, the pneumatic motor is communicated with an air source through an electromagnetic valve, and the inductor is arranged on the table top of the detection table through a fixing frame and matched with the thread go gauge. The position of the sensing end of the sensor is lower than the bottom surface of the thread go gauge, and the control end of the sensor and the control end of the electromagnetic valve are both connected with the controller. According to the utility model, the rapid detection of the workpiece can be realized through the device, the thread go gauge does not need to be rotated manually, the operation is labor-saving, and the detection efficiency is high.

Description

Technical Field

[0001] This utility model belongs to the field of workpiece inspection, and specifically relates to a thread inspection device for workpieces. Background Technology

[0002] In machining, the cutting tool moves a certain distance along the workpiece's axis, and the mark it leaves on the workpiece is called a thread. Due to the connection requirements of the workpiece, it is generally threaded to form a threaded hole. To ensure the reliability of the subsequent connection, the thread passability of the workpiece needs to be tested.

[0003] Traditional thread passability testing relies heavily on manual inspection, which involves manually screwing the workpiece into the thread gauge. This method is not only slow but also produces poor results due to operator fatigue. Utility Model Content

[0004] The purpose of this invention is to provide a thread detection device for workpieces to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A thread inspection device for a workpiece includes an inspection table, a rotating shaft, a pneumatic motor, a sensor, and a controller. The inspection table has a shaft hole that mates with the rotating shaft, which is vertically positioned within the shaft hole. The top of the rotating shaft is connected to a connecting rod via a clamp, and a thread gauge is fixedly mounted on the top of the connecting rod. The pneumatic motor is located at the bottom of the inspection table and is connected to the rotating shaft via a transmission assembly to drive the rotating shaft to rotate. The pneumatic motor is connected to an air source via a solenoid valve. The sensor is mounted on the inspection table surface via a mounting bracket and mates with the thread gauge. The sensing end of the sensor is positioned below the bottom surface of the thread gauge. The control ends of the sensor and the solenoid valve are both connected to the controller.

[0007] Preferably, the transmission assembly includes a driving wheel, a driven wheel, and a transmission belt that is fitted to the driving wheel and the driven wheel. The driving wheel is fixedly connected to the output end of the pneumatic motor, and the driven wheel is fixedly connected to the rotating shaft.

[0008] Preferably, a torque sensor is provided between the output shaft of the pneumatic motor and the drive wheel, and the torque sensor is connected to the controller.

[0009] Preferably, a bearing that mates with the bearing is provided outside the rotating shaft, and the bearing is connected to the testing platform.

[0010] Preferably, the sensor is a proximity switch and is horizontally positioned.

[0011] Preferably, the fixing frame includes a screw sleeve fixedly disposed on the test table surface, the screw sleeve being threadedly connected to a screw rod, an L-shaped sensor bracket being sandwiched between the screw sleeve and the screw rod, and the sensor being fixedly disposed on the top of the sensor bracket.

[0012] Preferably, the sensor is provided with an external thread in conjunction with the nut, and the fixing frame includes a fixing plate, a support rod and a washer. The support rod is fixedly mounted on the table surface of the testing station. The fixing plate is provided with a through hole in conjunction with the support rod. The washer is provided with a clearance groove in conjunction with the support rod. The washer is positioned between the fixing plate and the testing station. Two nuts are fixedly mounted on the fixing plate.

[0013] Preferably, a positioning plate is fixedly installed on the testing table, and a positioning block is provided on the top of the positioning plate near the thread gauge. The positioning block is configured with a positioning groove in cooperation with the workpiece.

[0014] Preferably, the solenoid valve is a two-position five-way valve.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] In this invention, the device enables rapid inspection of workpieces without the need for manual rotation of the thread gauge, saving effort and increasing inspection efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a thread detection device provided in an embodiment.

[0018] Figure 2 for Figure 1 The front view.

[0019] Figure 3 This is a structural diagram of the positioning plate and positioning block.

[0020] Figure 4 Another perspective structural diagram of the thread detection device provided in the embodiment.

[0021] Reference numerals: 1-Inspection table, 2-Rotating shaft, 3-Pneumatic motor, 4-Bearing, 5-Connecting rod, 6-Thread gauge, 7-Chuck, 8-Fixed bracket, 81-Sensor bracket, 82-Screw sleeve, 83-Screw, 84-Nut, 85-Fixed plate, 86-Support rod, 87-Washer, 88-Allowing groove, 9-Conveyor belt, 10-Sensor, 11-Torque sensor, 12-Positioning plate, 13-Positioning block, 14-Positioning groove, 15-Workpiece. Detailed Implementation

[0022] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Reference Figure 1-2 As shown, a thread detection device is used to detect the thread passability of a workpiece. The thread detection device includes a detection table 1, a rotating shaft 2, a pneumatic motor 3, a sensor 10, and a controller.

[0024] A pneumatic motor 3 is fixedly mounted at the bottom of the testing table 1. The pneumatic motor 3 is connected to the air source via a two-position five-way solenoid valve, which controls the forward and reverse rotation of the output shaft of the pneumatic motor 3. The testing table 1 has a shaft hole for the rotating shaft 2, which is vertically installed within the shaft hole. A bearing 4 is installed at the bottom of the testing table 1. The outer ring of the bearing 4 is fixed to the testing table 1 by welding or other means. The inner ring of the bearing 4 is fitted over the rotating shaft 2 and fixed to the rotating shaft 2 by an interference fit or other methods. A chuck 7 is fixedly mounted on the top of the rotating shaft 2 to fix the connecting rod 5. A threaded go gauge 6 is fixedly mounted on the connecting rod 5. The transmission assembly includes a driving wheel, a driven wheel, and a conveyor belt. This transmission assembly is located between the bottom of the rotating shaft 2 and the pneumatic motor 3. Specifically, the driving wheel is fixedly connected to the output shaft of the pneumatic motor 3 via a torque sensor, and the driven wheel is fixedly connected to the bottom of the rotating shaft 2. A conveyor belt 9 is installed between the driving wheel and the driven wheel, driving the driven wheel to rotate. Sensor 10 is mounted on the surface of the testing table 1 via a mounting bracket 8. Sensor 10 uses a proximity switch, which is horizontally positioned with its sensing end facing the central axis of the rotating shaft 2, and its height is lower than the bottom surface of the thread gauge 6. The control terminals of the proximity switch, the solenoid valve, and the torque sensor are all connected to the controller. When the proximity switch detects a workpiece, it sends a signal to the controller, which then sends a command to the solenoid valve to reverse the rotation of the rotating shaft 2 of the pneumatic motor 3. Otherwise, the rotating shaft 2 of the pneumatic motor 3 rotates forward. During this process, if the controller detects that the torque change of the torque sensor exceeds a preset threshold, the controller stops the pneumatic motor 3 from rotating. In this case, the workpiece is considered a defective product.

[0025] In this invention, the device enables rapid inspection of workpieces without the need for manual rotation of the thread gauge 6, reducing operational effort and increasing inspection efficiency. The vertically positioned thread gauge facilitates manual placement of the workpiece and alignment of the threaded hole.

[0026] The forward and reverse rotation of the shaft 2 is achieved by using a pneumatic motor 3 instead of an electric motor, which facilitates the rapid switching of the output shaft between forward and reverse rotation. It has high operational safety and can work at full load for a long time.

[0027] As one embodiment of the fixing bracket 8, such as Figure 2 As shown, the mounting bracket 8 includes a threaded sleeve 82 welded and fixed to the surface of the testing table 1, and a screw 83 threadedly connected to the threaded sleeve 82. An L-shaped sensor bracket 81 is sandwiched between the threaded sleeve 82 and the screw 83. The sensor bracket 81 has a mounting groove for mounting the sensor 10. The sensor 10 has external threads on its surface, and the sensor 10 is fixed to the sensor bracket 81 by a nut 84 threadedly connected to the surface of the sensor 10.

[0028] Furthermore, such as Figure 3 As shown, a positioning plate 12 is also provided on the table surface of the inspection station. A positioning block is provided on the front top of the positioning plate 12, and a positioning groove 14 is provided on the front top of the positioning block 13. The positioning groove cooperates with the rear side of the workpiece 15 so that the workpiece can be placed horizontally under the operation of the operator and the thread gauge can be quickly aligned with the screw hole.

[0029] As another embodiment of the fixing bracket 8, such as Figure 4 As shown, the fixing frame 8 includes a fixing plate 85, two support rods 86, and gaskets 87. The two support rods 86 are fixedly mounted on the table surface of the testing table 1. The fixing plate 85 has two through holes corresponding to the two support rods 86. The fixing plate 85 is sleeved on the support rods 86 through the through holes. Multiple gaskets 87 are provided. The height of different gaskets 87 can be the same or different. Each gasket 87 has a relief groove 88 on one side to cooperate with the support rod 86. The gasket 87 can be inserted into the fixing plate 85 and the testing table 1 through the relief groove 88. On the support rod 86, the number of shims 87 can be increased or decreased or different shims 87 can be replaced according to the required height of the sensor 10, so as to achieve flexible adjustment of the height of the sensor 10. Two nuts 84 are set on the top of the fixing plate 85, and the sensor 10 is provided with external threads that cooperate with the nuts 84 to realize the connection between the sensor 10 and the fixing plate 85. The lateral distance between the sensor 10 and the rotating shaft 2 can be adjusted by rotating the sensor 10. The threaded sensor 10 has a self-locking function and will not move during the detection process.

[0030] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit the utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A thread detection device for a workpiece, characterized in that, The device includes a testing platform, a rotating shaft, a pneumatic motor, a sensor, and a controller. The testing platform has a shaft hole that mates with the rotating shaft, which is vertically positioned within the shaft hole. The top of the rotating shaft is connected to a connecting rod via a clamp, and a threaded go gauge is fixedly mounted on the top of the connecting rod. The pneumatic motor is located at the bottom of the testing platform and is connected to the rotating shaft via a transmission assembly to drive the rotating shaft to rotate. The pneumatic motor is connected to an air source via a solenoid valve. The sensor is mounted on the testing platform via a mounting bracket and mates with the threaded go gauge. The sensing end of the sensor is positioned below the bottom surface of the threaded go gauge. The control ends of the sensor and the solenoid valve are both connected to the controller.

2. The thread detection device for a workpiece as described in claim 1, characterized in that, The transmission assembly includes a driving wheel, a driven wheel, and a transmission belt that is fitted to the driving wheel and the driven wheel. The driving wheel is fixedly connected to the output end of the pneumatic motor, and the driven wheel is fixedly connected to the rotating shaft.

3. The thread detection device for a workpiece as described in claim 2, characterized in that, A torque sensor is installed between the output shaft of the pneumatic motor and the drive wheel, and the torque sensor is connected to the controller.

4. The thread detection device for a workpiece as described in claim 1, characterized in that, The sensor is a proximity switch and is horizontally positioned.

5. The thread detection device for a workpiece as described in claim 4, characterized in that, The mounting bracket includes a screw sleeve fixedly mounted on the test table surface, the screw sleeve being threadedly connected to a screw rod, an L-shaped sensor bracket being sandwiched between the screw sleeve and the screw rod, and the sensor being fixedly mounted on the top of the sensor bracket.

6. The thread detection device for a workpiece as described in claim 4, characterized in that, The sensor is fitted with an external thread in conjunction with the nut. The mounting bracket includes a mounting plate, a support rod, and a washer. The support rod is fixedly mounted on the table surface of the testing station. The mounting plate is fitted with a through hole in conjunction with the support rod. The washer is fitted with a clearance groove in conjunction with the support rod. The washer is positioned between the mounting plate and the testing station. Two nuts are fixedly mounted on the mounting plate.

7. The thread detection device for a workpiece as described in claim 1, characterized in that, A positioning plate is fixedly installed on the testing platform. A positioning block is set on the top of the positioning plate near the thread gauge. The positioning block is configured with a positioning groove to cooperate with the workpiece.

8. The thread detection device for a workpiece as described in claim 1, characterized in that, The solenoid valve is a two-position five-way valve.

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