TWM624881U - Gear profile auto-testing equipment for medical gears - Google Patents

Abstract

This creation relates to an automatic detection equipment for gear contours of medical gears, which is used to detect medical gears, such as gears of dental handpieces. The automatic detection equipment includes: a detection device, a feeding device, a feeding device and a processing unit . The feeding device transports the gear to the feeding device; the feeding device sequentially transports the gear to a detection pick-up position, a good product pick-up position or a defective product pick-up position; the detection device is in the detection pick-up position. The gear is obtained from the material position, and a three-dimensional image file of a tooth profile of the gear is obtained through a first laser scanner and a second laser scanner; the processing unit compares the three-dimensional image file with a standard image file, Thereby, the gear is judged as a good product or a bad product according to an error between the three-dimensional image file and the standard image file, and the above-mentioned configuration achieves the effect of automatic continuous detection.

Description

Gear profile automatic testing equipment for medical gears

This creation is about an automatic detection equipment for gear contours of medical gears, especially the gear contour images with high precision obtained by laser scanners, combined with image recognition and automatic conveying devices to automatically and continuously detect medical gears gears Creation of silhouettes.

A common detection method for medical gears is to use the probe of a three-dimensional measuring instrument to detect the gear profile of the gear. However, this contact detection method has a slow measurement speed and is difficult to apply to a large number of detections, and the contact detection using a probe has the disadvantage of wear and tear on the gears.

Check out the patent case of Invention No. I579526 "Gear meshing area identification system and method" announced on April 21, 106 of the Republic of China, which discloses that the gear meshing area identification system includes an image capture unit, a storage unit and a image processing unit. The image capturing unit is used for capturing an image information of at least one tooth surface of a gear. The storage unit is coupled to the image capture unit to store image information. The image processing unit is coupled to the storage unit to obtain image information, and processes the image information to obtain at least one quantized value of a meshing area of the tooth surface. The quantified value is the centroid coordinate, total area, contour, rolling area or sliding area of the meshing region.

In this case, image capture is used for measurement, which has the problem of large error value, and is not suitable for the detection of precision gears for dental handpieces, for example. In addition, how to perform continuous mass detection by automation is also a problem to be overcome.

Accordingly, this creation proposes a gear profile automatic detection device for medical gears, which is used to detect a medical gear. The automatic detection device includes: a detection device, a feeding device, a feeding device and a processing unit.

The detection device includes a first motor, a first laser scanner and a second laser scanner, the first motor has a detection platform, and the gear is transported from a detection and reclaiming position to the detection platform, so that the The gear rotates around an axial direction when the first motor is actuated, and the first laser scanner and the second laser scanner scan a tooth profile of the gear toward the gear, so as to obtain a three-dimensional image file. The gear is transported back to the detection and reclaiming position after the scanning is completed. The feeding device includes a second motor and a turntable combined with the second motor, as well as a first arm, a second arm and a third arm, the gear is conveyed to the turntable from a feeding position, the first arm The two motors actuate to rotate the turntable, the gear rotates with the turntable to the detection and reclaiming position, and after the scanning of the gear is completed, the second motor is actuated again to make the turntable rotate, and the gear rotates correspondingly with the turntable to a good product The reclaiming position or a defective product reclaiming position, the first arm corresponds to the reclaiming position for detection, the second arm corresponds to the good product reclaiming position, and the third arm corresponds to the defective product reclaiming position, so as to be detected from the detection respectively. The gear is conveyed at the reclaiming position, the reclaiming position of the good product and the reclaiming position of the defective product. The feeding device corresponds to the feeding position, thereby conveying the gear to the turntable. The processing unit is electrically connected to the first motor, the first laser scanner and the second laser scanner; the second motor, the first arm, the second arm and the third arm; and the process The processing unit compares the three-dimensional drawing file with a standard drawing file, and when the outlines of the three-dimensional drawing file and the standard drawing file do not overlap, judges that there is an error between the three-dimensional drawing file and the standard drawing file, When the error is greater than a range value, the processing unit determines that the gear is a defective product, and when the error is not greater than the range value or the error does not exist, the processing unit determines that the gear is a good product.

Further, an output unit is electrically connected to the processing unit, so as to output the judgment result.

Further, one of the feeding position, the detection reclaiming position, the good product reclaiming position and the defective product reclaiming position, and the other of the good product reclaiming position and the defective product reclaiming position are arranged at a 90-degree annular interval. .

Further, the first laser scanner scans the gear along the axis, and the second laser scanner scans the gear perpendicular to the axis.

Further, the type of the error is one or a combination of single pitch error, adjacent pitch error, cumulative pitch error and groove yaw error. The aforementioned range value is between 1 μm and 3 μm.

Further, the first motor is a servo motor.

According to the above technical features, the following effects can be achieved:

1. For the inspection of medical gears after production, the entire inspection process is carried out in an automatic and continuous manner, which is convenient in operation.

2. Use the first laser scanner and the second laser scanner to scan the gear to be tested in the axial and vertical directions, respectively, without any contact with the gear to be tested. In addition to high detection accuracy, it can also Avoid wear problems.

3. The turntable of the feeding device transports the gears from the feeding position to the detection and reclaiming position, the defective product reclaiming position and the good product reclaiming position in sequence, and the first arm, the second arm and the third arm are used to detect and take out the material respectively. Position, defective product pick-up position and good product pick-up position gripping gear to achieve the effect of automatic and continuous detection.

In view of the above technical features, the main functions of the automatic gear profile detection equipment for medical gears of the present invention will be clearly presented in the following embodiments.

Referring to the first and second figures, the automatic detection equipment of this embodiment includes: a detection device 1 , a feeding device 2 , a feeding device 3 , a processing unit 4 and an output unit 5 .

The detection device 1 includes a first motor 11 , a first laser scanner 12 and a second laser scanner 13 , a detection platform 111 on the first motor 11 , the first laser scanner 12 and the second laser scanner 13 . The second laser scanner 13 faces a detection area above the detection platform 111; The two laser scanners 13 face the detection area in a direction perpendicular to the axial direction. Among them, in this embodiment, the first motor 11 preferably uses a servo motor and has a built-in optical positioning system, and the first laser scanner 12 and the second laser scanner 13 are selected from Micro-Epsilon's scanCONTROL series. Laser Scanner.

The feeding device 2 includes a second motor 21 and a turntable 22 combined with the second motor 21 , as well as a first arm 23 , a second arm 24 and a third arm 25 . The feeding device 3 is adjacent to the turntable 22 ; specifically, the feeding device 3 , the first arm 23 , the second arm 24 and the third arm 25 are arranged adjacent to the turntable 22 at an annular interval of 90 degrees.

The processing unit 4 is electrically connected to the first motor 11 , the first laser scanner 12 and the second laser scanner 13 ; the second motor 21 , the first arm 23 , the second arm 24 and the The third arm 25 ; the feeding device 3 and the output unit 5 . Among them, in this embodiment, the processing unit 4 preferably uses the PRIMERGY TX2550 M5 upright server of FUJITSU to improve the operation efficiency and accuracy in subsequent processing; the output unit 5 can be a display, or even an alarm and the like.

Referring to the first, second and third figures, the feeding device 3 , the first arm 23 , the second arm 24 and the third arm 25 are respectively a feeding position P1 , a detecting and reclaiming Position P2, a defective product picking position P3 and a good product picking position P4 are adjacent to the turntable 22, therefore, the feeding position P1, the detection picking position P2, the defective product picking position P3 and the good product picking position P2 are adjacent to the turntable 22. The material position P4 is arranged at a 90-degree annular interval.

In more detail, the processing unit 4 controls the feeding device 3 to deliver a gear 6 from the feeding position P1 to the turntable 22 , and then the gear 6 can rotate with the turntable 22 , and the gear 6 rotates sequentially every 90 degrees. After passing through the detection pick-up position P2, the defective product pick-up position P3 and the good product pick-up position P4, and through the first arm 23, the second arm 24 and the third arm 25 respectively from the detection pick-up position P2 , The defective product reclaiming position P3 and the good product reclaiming position P4 clamp the gear 6 to perform corresponding work. In actual implementation, according to the setting positions of the conveyor belts, boxes, etc. at the rear end of the factory, the defective product pick-up position P3 and the good product pick-up position P4 can also be exchanged.

Referring to the first, fourth to sixth figures, when the gear 6 rotates with the turntable 22 to the detection and reclaiming position P2, the processing unit 4 controls the first arm 23 to remove the gear 6 from the The detection pick-up position P2 is clamped on the detection platform 111 .

Afterwards, the processing unit 4 controls the first motor 11 to act, and drives the detection platform 111 together with the gear 6 to rotate around the axis. When the gear 6 rotates around the axis, the processing unit 4 controls the first laser scanner 12 to scan the gear 6 along the axis to obtain a first point data, and controls the second laser The scanner 13 scans the gear 6 perpendicular to the axial direction to obtain a second point data. The processing unit 4 converts the first point data and the second point data according to a scanning path of the first laser scanner 12 and the second laser scanner 13 and a rotation angle of the gear 6 For a three-dimensional image file, the processing unit 4 then compares the three-dimensional image file with a standard image file. Preferably, both the three-dimensional drawing file and the standard drawing file are stereolithography (STereo Lithography, STL) drawing files, and the standard drawing file is, for example, a design drawing of the gear 6 drawn by an engineer, so that the three-dimensional drawing can be directly Comparing the drawing file with the standard drawing file is also easier to assist the engineer in analyzing and interpreting. Since the first motor 11 is a servo motor, the rotation angle of the first motor 11 can be accurately recorded, thereby increasing the accuracy of the three-dimensional image file, and by scanning the first laser scanner 12 along the axial direction , and with the second laser scanner 13 scanning perpendicular to the axial direction, only two laser scanners can complete the construction of the three-dimensional image file in a non-contact manner, while reducing the number of components, it can also increase Detection accuracy, avoid the wear problem of contact detection.

When the outlines of the three-dimensional image file and the standard image file do not overlap, the processing unit 4 determines that there is an error between the three-dimensional image file and the standard image file, and the type of the error is, for example, a single pitch error, adjacent tooth pitch Error, cumulative pitch error and groove yaw error. When the error is greater than a range value, the processing unit 4 determines that the gear 6 is a defective product; when the error is not greater than the range value, or when the error does not exist, the processing unit 4 determines that the gear 6 is a Good product. Taking a single pitch error as an example, the processing unit 4 judges, for example, on the diameter of the pitch circle of the gear 6, whether the three-dimensional image file and the two adjacent teeth in the standard image file overlap, and when they are not overlapped, the The difference in distance between two adjacent teeth on the pitch circle diameter is the error. The range of values is between 1 micrometer and 3 micrometers, preferably, between 1 micrometer and 2 micrometers. Since the range value can be as low as 1 micron to 2 microns, the detection accuracy is high, which ensures that the gear 6 can be accurately installed on medical devices such as dental handpieces, and avoids loosening and skewing of the dental handpiece during use. Wait. When the processing unit 4 determines that the gear 6 is the defective product or the good product as a determination result, the processing unit 4 outputs the determination result through the output unit 5, which is convenient for the engineer to inspect immediately, and can also periodically evaluate Factory yield, confirm whether the equipment needs to be replaced, etc.

After the first laser scanner 12 and the second laser scanner 13 complete scanning the gear 6 , the processing unit 4 controls the first arm 23 to retrieve the gear 6 from the detection platform 111 . on the turntable 22. The processing unit 4 controls the second motor 21 to act again to drive the turntable 22 to rotate, so that the gear 6 will enter the defective product picking position P3 along with the turntable 22. If the gear 6 is determined to be a defective product, the processing The unit 4 will control the second arm 24 to take out the gear 6 from the turntable 22 from the defective product picking position P3. If the gear 6 is determined as the good product, the processing unit 4 does not control the second arm 24 Actuation; the processing unit 4 continues to control the second motor 21 to actuate to drive the turntable 22 to rotate, so that the gear 6 will enter the good product reclaiming position P4 along with the turntable 22. The gear 6 is judged as a good product, so the processing unit 4 will control the third arm 25 to take the gear 6 out of the turntable 22 from the good product taking position P4. Thereby, the detection and classification of the gear 6 is completed. Through the arrangement of the feeding position P1, the detection and retrieval position P2, the defective product retrieval position P3 and the good product retrieval position P4, as well as the first arm 23, the second arm 24 and the third arm 25 With the matching of automation equipment, the turntable 22 can receive a gear 6 to be detected every 90 degrees of rotation, and the gears 6 can be automatically and continuously detected and correctly classified one by one.

Based on the descriptions of the above-mentioned embodiments, one can fully understand the operation, use and effects of the present creation, but the above-mentioned embodiments are only the preferred embodiments of the present creation, and should not limit the implementation of the present creation. The scope, that is, the simple equivalent changes and modifications made according to the scope of the patent application and the description of the creation, are all within the scope of the creation.

1: Detection device 11: The first motor 111: Detection Platform 12: The first laser scanner 13: Second Laser Scanner 2: Feeding device 21: Second motor 22: Turntable 23: First Arm 24: Second Arm 25: Third Arm 3: Feeding device 4: Processing unit 5: Output unit 6: Gear P1: Feeding position P2: Detect the reclaiming position P3: Receiving position of defective products P4: Good product reclaiming position

[Figure 1] is a functional block diagram of the configuration of each device in this creation.

[The second picture] is one of the schematic diagrams of the operation state of this creation, showing that the feeding device conveys the gear to the turntable of the feeding device from the feeding position.

[Picture 3] is a schematic diagram showing that the turntable of the feeding device of this creation sequentially transports the gears from the feeding position to the detection and reclaiming position, the good product reclaiming position or the defective product reclaiming position, so as to achieve automatic continuous detection.

[Picture 4] is the second schematic diagram of the operation state of this creation, showing that the feeding device conveys the gear to the detection device from the detection and reclaiming position.

[Fig. 5] is a partial enlarged view of Fig. 4, showing the mode in which the first arm self-detects the reclaiming position of the feeding device to grip the gear.

[Figure 6] is the third schematic diagram of the operation state of the present creation, which shows that the detection device scans the gears by the first laser scanner and the second laser scanner to form a three-dimensional image file.

1: Detection device

11: The first motor

12: The first laser scanner

13: Second Laser Scanner

2: Feeding device

21: Second motor

23: First Arm

24: Second Arm

25: Third Arm

3: Feeding device

4: Processing unit

5: Output unit

Claims (7)

A gear profile automatic detection equipment for medical gears, used for detecting a medical gear, the automatic detection equipment includes: A detection device includes a first motor, a first laser scanner and a second laser scanner, the first motor has a detection platform, and the gear is transported from a detection and reclaiming position to the detection platform, The gear is rotated around an axial direction with the operation of the first motor, the first laser scanner and the second laser scanner are directed toward the gear to scan a tooth profile of the gear, so as to obtain a three-dimensional image file, The gear is transported back to the detection and reclaiming position after scanning is completed; A feeding device includes a second motor and a turntable combined with the second motor, the feeding device also has a first arm, a second arm and a third arm, and the gears are conveyed from a feeding position to the turntable , the second motor is actuated to make the turntable rotate, the gear rotates with the turntable to the detection and reclaiming position, and after the scanning of the gear is completed, the second motor is actuated again to make the turntable rotate, and the gear corresponds to the turntable Rotate to a good product picking position or a defective product picking position, the first arm corresponds to the detection picking position, the second arm corresponds to the good product picking position, and the third arm corresponds to the defective product picking position, so as to The gear is conveyed from the detection reclaiming position, the good product reclaiming position and the defective product reclaiming position; a feeding device, corresponding to the feeding position, so as to convey the gear to the turntable; a processing unit electrically connected to the first motor, the first laser scanner and the second laser scanner; the second motor, the first arm, the second arm and the third arm; and the Feeding device; the processing unit compares the three-dimensional drawing file with a standard drawing file, and when the outlines of the three-dimensional drawing file and the standard drawing file do not overlap, judges that there is an error between the three-dimensional drawing file and the standard drawing file , when the error is greater than a range value, the processing unit determines that the gear is a defective product, and when the error is not greater than the range value or does not exist, the processing unit determines that the gear is a good product. The gear profile automatic detection equipment for medical gears as claimed in claim 1, wherein one of the feeding position, the detection and retrieving position, the good product retrieving position and the defective product retrieving position, the good product retrieving position The position and the other position of the defective product take-up position are arranged at a 90-degree annular interval. The gear profile automatic detection equipment for medical gears as claimed in claim 1, further, an output unit is electrically connected to the processing unit, so as to output the determination result. The gear profile automatic detection equipment for medical gears as claimed in claim 1, wherein the first laser scanner scans the gear along the axial direction, and the second laser scanner scans the gear perpendicular to the axial direction. The gear profile automatic detection equipment for medical gears as claimed in claim 1, wherein the type of the error is one of single pitch error, adjacent pitch error, cumulative pitch error and groove yaw error or a combination thereof . The gear profile automatic inspection equipment for medical gears as claimed in claim 5, wherein the range value is between 1 micron and 3 microns. The gear profile automatic detection device for medical gears as claimed in claim 1, wherein the first motor is a servo motor.

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