Secondary tool setting device of full-automatic tooth manufacturing equipment based on visual identification

Abstract

The invention belongs to the field of gear machining, and relates to a secondary tool setting device of full-automatic tooth manufacturing equipment based on visual recognition, which is used for solving the problems that machining of intermediate parts is interrupted in the gear machining process, and secondary tool setting cannot be carried out on the original position after disassembly. The device is characterized in that a controllable high-precision motor (1) is in transmission connection with a gear manufacturing equipment main shaft (2), and a machined gear (3) is mounted on the gear manufacturing equipment main shaft (2); the industrial camera (5) is connected with the grating sliding rail (4) and can slide up and down along the grating sliding rail (4) to the position aligned with the center line of the gear manufacturing equipment main shaft (2), so that the center line of a lens of the industrial camera (5) and the center line of the gear manufacturing equipment main shaft (2) are located on the same straight line, and the angular position of the machined gear (3) is captured through the industrial camera (5). A cable of the industrial camera (5) penetrates through the grating sliding rail (4) to be connected with the controllable high-precision motor (1), and the industrial camera (5) controls the controllable high-precision motor (1) to rotate through the cable. The tool setting device is suitable for secondary machining tool setting of the gear.

Description

Technical Field

[0001] The invention belongs to the field of gear processing and relates to a secondary tool setting device of fully automatic gear manufacturing equipment based on visual recognition. Background Art

[0002] Commonly used gear making equipment on the market are gear hobbing machines and gear shaping machines, both of which are gear making equipment using the generating method and are driven by high-precision motors. Such gear making equipment on the market does not have good secondary tool setting processing capabilities. During the processing, parts are removed from the equipment for measurement or meshing trial. If the size requires secondary processing, it is impossible to quickly re-align the original position of the parts, resulting in the scrapping of the parts. Some existing devices are mechanically aligned, which has a certain degree of precision error and the part alignment process requires manual operation, which is more dependent on the operator's operating skills and experience. The tool setting cycle is long and it is impossible to achieve fully automatic secondary tool setting. Summary of the invention

[0003] The technical problem to be solved by the present invention is: a secondary tool setting device for fully automatic gear making equipment based on visual recognition, which is used to solve the problem that the processing of parts is interrupted in the middle of the gear processing process and the original position of the tool cannot be set again after disassembly.

[0004] The technical solution of the present invention is:

[0005] A secondary tool setting device for a fully automatic gear making equipment based on visual recognition, comprising: a controllable high-precision motor 1, a grating slide rail 4, and an industrial camera 5;

[0006] A controllable high-precision motor 1 is connected to the main shaft 2 of the gear making equipment through a transmission, and the processed gear 3 is installed on the main shaft 2 of the gear making equipment; the industrial camera 5 is connected to the grating slide rail 4, and can slide up and down along the grating slide rail 4 to a position aligned with the center line of the main shaft 2 of the gear making equipment, so that the center line of the lens of the industrial camera 5 is in the same straight line with the center line of the main shaft 2 of the gear making equipment, and the angular position of the processed gear 3 is captured by the industrial camera 5. The cable of the industrial camera 5 passes through the grating slide rail 4 and is connected to the controllable high-precision motor 1, and the industrial camera 5 controls the rotation of the controllable high-precision motor 1 through the cable.

[0007] The industrial camera 5 has an accuracy of no less than 0.005 mm and is equipped with a light source, lens, light control and computing host.

[0008] The controllable high-precision motor 1 needs to have an accuracy within the range of 0.002 mm.

[0009] Before the processed gear 3 is removed after processing, the grating slide 4 is operated to drive the industrial camera 5 to align the processed gear 3. The center of the industrial camera 5 lens is in the same straight line as the main shaft 2 of the gear making equipment. The angular position of the processed gear 3 is recorded for the first time. The recorded position is the radial symmetry bisector of the center of the processed gear 3 and the highest tooth in the vertical direction. After recording, the processed gear 3 can be removed.

[0010] After the processed gear 3 is reinstalled, the grating slide 4 runs again, driving the industrial camera 5 to align with the processed gear 3 and record the angular position of the processed gear 3 for the second time. The recorded position is still the radial symmetric bisector of the center of the processed gear 3 and the highest tooth in the vertical direction. The bisector formed by the two recorded positions will form an angle α with the center of the processed gear 3. The industrial camera 5 drives the controllable high-precision motor 1 to rotate to eliminate the angle α.

[0011] The industrial camera 5 drives the controllable high-precision motor 1 to rotate, and the angle α is eliminated as follows:

[0012] The image captured by the lens of the industrial camera 5 is post-processed by visual software and compared with the two gear images captured before and after. At this time, it is necessary to consider the parallelism between the end face of the spindle 2 of the gear making equipment and the end face of the gear 3 being processed when the gear 3 being processed is clamped. The horizontal angle between the lens and the plane of the gear 3 being processed is calculated to obtain the horizontal alignment constant α horizontal. The boundary blur constant α blur compensation can be obtained by comparing the tooth profiles of the two gear images captured before and after. After compensation with the constants of horizontal alignment and boundary blur constants, the angle α1 is calculated. At this time, the host of the industrial camera sends the α1 feedback signal to the controllable high-precision motor 1, and the controllable high-precision motor 1 drives the spindle 2 of the gear making equipment to rotate by an angle of α1 to complete the secondary tool setting action of the processed gear.

[0013] Feedback angle calculation formula: α1=α±α 水平 ±α 模糊补偿 .

[0014] Among them, α is the angle calculated by two image capture measurements, α 水平 Find a positive constant for the level, α 模糊补偿 is the boundary blur constant.

[0015] If the offset angle of the processed gear 3 is too large during the secondary clamping and the camera cannot be aligned, the indicator light of the industrial camera 5 lights up and the feedback signal stops the device from starting.

[0016] The beneficial effect of this application is that the device adopts the method of image recognition and capture, and realizes the secondary tool setting function of the gear making equipment by comparing the difference in image angles before disassembly and after installation, combined with the calculation of compensation amount, and gets rid of the dependence of secondary tool setting of gear making equipment on manual labor, which greatly saves manual labor. At the same time, it is compatible with different types of processed parts such as gears and turbines, and is also compatible with different types of equipment such as hobbing machines and gear shaping machines. The accuracy of secondary tool setting can usually reach about 0.005, and the accuracy can be further improved by combining the ability of the application components. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention.

[0018] Figure 2 It is a front view and a centering schematic diagram of the present invention. DETAILED DESCRIPTION

[0019] The present application is further described in detail below in conjunction with the accompanying drawings of the embodiments.

[0020] Figure 1 It is a structural schematic diagram of the secondary tool setting device of the fully automatic gear making equipment based on visual recognition, wherein the controllable high-precision motor 1 is connected to the main shaft 2 of the gear making equipment through a transmission, the processed gear 3 is installed on the main shaft 2 of the gear making equipment, and the grating slide 4 helps the industrial camera 5 to align the processed gear 3. The industrial camera 5 integrates the light source, lens, light control and host, and can accurately capture the angular position of the processed gear 3.

[0021] Figure 2 The image shows the positions of the processed gear 3 before the parts are removed and the processed gear part 3' after secondary clamping, which are captured by an industrial camera. The two positions appear to be rotated by an angle α in the image.

[0022] Figure 2 The captured angle α is processed by the host of the industrial camera 5 as a signal α1 and fed back to the controllable high-precision motor of the component 1. The motor then drives the main shaft of the gear making equipment to rotate to complete the secondary tool setting action.

[0023] The embodiment of the present invention is used to solve the problem that the processing of parts is interrupted in the middle of the gear processing process and the original position of the tool cannot be adjusted again after disassembly. The device can be used in conjunction with equipment such as gear hobbing machines and gear shaping machines that use the involute method to process gears, and can efficiently and accurately find the position of the parts before disassembly and complete the secondary tool adjustment action.

[0024] like Figure 1 , 2 As shown, the embodiment of the present invention includes: a controllable high-precision motor 1, a grating slide rail 4, and an industrial camera 5;

[0025] A controllable high-precision motor 1 is connected to the main shaft 2 of the gear making equipment through a transmission, and the processed gear 3 is installed on the main shaft 2 of the gear making equipment; the industrial camera 5 is connected to the grating slide rail 4, and can slide up and down along the grating slide rail 4 to a position aligned with the center line of the main shaft 2 of the gear making equipment, so that the center line of the lens of the industrial camera 5 is in the same straight line with the center line of the main shaft 2 of the gear making equipment, and the angular position of the processed gear 3 is captured by the industrial camera 5. The cable of the industrial camera 5 passes through the grating slide rail 4 and is connected to the controllable high-precision motor 1, and the industrial camera 5 controls the rotation of the controllable high-precision motor 1 through the cable.

[0026] Before the gear is disassembled after processing, the device is operated by a grating slide to drive the industrial camera to align with the processed gear. The center of the industrial camera lens is in the same straight line with the rotation center of the processed gear, that is, the main shaft of the gear making equipment. The angular position of the processed gear is recorded for the first time. The recorded position is the radial symmetry bisector of the gear center and the highest tooth in the vertical direction. After recording, the processed gear can be removed for measurement or meshing transmission tests. During secondary processing, the processed gear can be installed on the main shaft of the gear making equipment at any angular position. The grating slide runs again to drive the industrial camera to align with the processed gear and record the angular position of the processed gear for the second time. The recorded position is still the radial symmetry bisector of the gear center and the highest tooth in the vertical direction. The bisector formed by the two recorded positions will form an angle α with the gear center.

[0027] The image captured by the industrial camera through the lens is post-processed by the visual software and compared with the two gear images captured before and after. At this time, it is necessary to consider the parallelism between the spindle end face of the gear making equipment and the end face of the processed gear when the parts are clamped. The horizontal angle between the lens and the plane of the processed gear is calculated to obtain the constant α for horizontal alignment. 水平 By comparing the tooth profiles of the two gear images captured before and after, the boundary fuzzy constant α can be obtained. 模糊补偿 , combined with the constant of horizontal alignment and the boundary fuzzy constant for compensation, the angle α1 is calculated. At this time, α1 is an accurate value obtained through a series of operations such as direct capture, horizontal alignment, and boundary fuzzy compensation. It can avoid errors caused by the accuracy of the industrial camera, light source, and algorithm. At this time, the host of the industrial camera will feedback the α1 signal to the controllable high-precision motor. The controllable high-precision motor is usually a high-precision servo motor or a worm transmission system driven by a motor. To ensure the transmission accuracy, the motor drives the main shaft of the gear making equipment to rotate by an angle of α1. At this time, it is necessary to control the motor speed and reduce the action speed to reduce the moment of inertia to complete the angular adjustment of the processed gear. At this time, the tool spindle of the gear making equipment is guaranteed to be stationary, and the secondary tool setting action of the processed gear can be completed.

[0028] Feedback angle calculation formula: α1=α±α 水平 ±α 模糊补偿

[0029] The rotation angle α1 of the processed gear after the secondary clamping adjusted by the device is α calculated by two image capture measurements, and the constant α for horizontal alignment 水平 , boundary blur constant α 模糊补偿 Calculated jointly.

[0030] The industrial camera must have an accuracy of 0.005mm and come with its own light source, lens, light control and computing host.

[0031] The grating slide rail must ensure that the industrial camera lens can face the end face of the processed gear and fully observe the gear involute profile. At the same time, the offset caused by the grating slide rail and the camera position must be controlled by the horizontal alignment constant α. 水平 Make compensation.

[0032] The device can provide feedback on the clamping status of the processed gear. If the offset angle of the processed gear is too large or the camera cannot be aligned during the secondary clamping, the indicator light of the industrial camera will light up and the feedback signal will stop the device from starting.

[0033] The controllable high-precision motor accuracy must be within 0.002 mm to ensure the final alignment accuracy.

[0034] The device can be used to find the parts of the tool position for the second time, and is compatible with different processed parts such as gears, turbines, etc., and is compatible with gear making equipment such as gear hobbing machines and gear shaping machines.

[0035] The device needs to be installed inside the equipment and aligned to ensure the accuracy of the images captured by the camera. The program needs to be embedded in the original equipment control module to directly drive the controllable high-precision motor.

[0036] The overall accuracy of the structure can be further improved as the accuracy of the industrial cameras and controllable high-precision motors used is improved.

[0037] The present invention solves the problem that the gear making equipment cannot complete the secondary tool setting to the original position and continue the original processing after the gear is disassembled for measurement, meshing test and other actions. The use of fully automatic secondary tool setting solves the problem that the mechanical secondary tool setting device relies on manual experience and has low efficiency. The fully automatic alignment process is not limited to a certain type of gear making equipment, and can be applied to all gear making equipment driven by controllable high-precision motors. After simple installation, the tool setting work can be completed by the equipment itself. The device is driven by a controllable high-precision motor, so the tool setting accuracy is extremely high.

Claims

1. A secondary tool setting device for fully automatic gear making equipment based on visual recognition, characterized in that: include: Controllable high-precision motor (1), grating slide rail (4), industrial camera (5); A controllable high-precision motor (1) is connected to a main shaft (2) of a gear making device through a transmission, and a processed gear (3) is mounted on the main shaft (2) of the gear making device; an industrial camera (5) is connected to a grating slide rail (4), and can slide up and down along the grating slide rail (4) to a position aligned with the center line of the main shaft (2) of the gear making device, so that the center line of the lens of the industrial camera (5) and the center line of the main shaft (2) of the gear making device are on the same straight line, and the angular position of the processed gear (3) is captured by the industrial camera (5); a cable of the industrial camera (5) passes through the grating slide rail (4) and is connected to the controllable high-precision motor (1), and the industrial camera (5) controls the rotation of the controllable high-precision motor (1) through the cable.

2. The secondary tool setting device for fully automatic gear making equipment based on visual recognition according to claim 1, characterized in that: The industrial camera (5) has an accuracy of not less than 0.005 mm and is equipped with a light source, lens, light control and computing host.

3. The secondary tool setting device for fully automatic gear making equipment based on visual recognition according to claim 1, characterized in that: The controllable high-precision motor (1) needs to have an accuracy within the range of 0.002 mm.

4. The secondary tool setting device for fully automatic gear making equipment based on visual recognition according to claim 1, characterized in that: Before the processed gear (3) is removed after processing, the grating slide rail (4) is operated to drive the industrial camera (5) to align with the processed gear (3). The center of the lens of the industrial camera (5) and the main shaft (2) of the gear making equipment are on the same straight line. The angular position of the processed gear (3) is recorded for the first time. The recorded position is the radial symmetry bisector of the center of the processed gear (3) and the highest tooth in the vertical direction. After recording, the processed gear (3) can be removed.

5. A secondary tool setting device for fully automatic gear making equipment based on visual recognition as claimed in claim 4, characterized in that: After the processed gear (3) is reinstalled, the grating slide rail (4) is operated again, driving the industrial camera (5) to align with the processed gear (3) and record the angular position of the processed gear (3) for the second time. The recorded position is still the radial symmetric bisector of the center of the processed gear (3) and the highest tooth in the vertical direction. The bisector formed by the two recorded positions will form an angle α with the center of the processed gear (3). The industrial camera (5) drives the controllable high-precision motor (1) to rotate to eliminate the angle α.

6. A secondary tool setting device for fully automatic gear making equipment based on visual recognition as claimed in claim 5, characterized in that: The industrial camera (5) drives the controllable high-precision motor (1) to rotate, and the angle α is eliminated as follows: The image captured by the industrial camera (5) through the lens is post-processed by visual software and compared with the two gear images captured before and after. At this time, it is necessary to consider the parallelism between the end face of the main shaft (2) of the gear making equipment and the end face of the gear (3) being processed when the gear (3) being processed is clamped. The horizontal angle between the lens and the plane of the gear (3) being processed is calculated to obtain the horizontal alignment constant α horizontal. The tooth profiles of the two gear images captured before and after can be compared to obtain the boundary blur constant α blur compensation. After compensation is performed by combining the horizontal alignment constant and the boundary blur constant, the angle α1 is calculated. At this time, the host of the industrial camera sends an α1 feedback signal to the controllable high-precision motor (1). The controllable high-precision motor (1) drives the main shaft (2) of the gear making equipment to rotate by an angle of α1 to complete the secondary tool setting action of the processed gear.

7. A secondary tool setting device for fully automatic gear making equipment based on visual recognition as claimed in claim 6, characterized in that: Feedback angle calculation formula: α1=α±α 水平 ±α 模糊补偿 . Among them, α is the angle calculated by two image capture measurements, α 水平 Find a positive constant for the level, α 模糊补偿 is the boundary blur constant.

8. The secondary tool setting device for fully automatic gear making equipment based on visual recognition as claimed in claim 1, characterized in that: If the offset angle of the processed gear (3) is too large during the secondary clamping and the camera cannot be aligned, the indicator light of the industrial camera (5) will light up and the feedback signal will stop the device from starting.

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