Gear blank flaw detection positioning device

Abstract

The utility model aims to solve the problem that whether a die-cast gear blank with flaws can be used as a good product or not cannot be judged in the prior art. The utility model relates to a gear blank flaw detection positioning device which comprises a gear blank discharge port, a gear blank support table is arranged at the gear blank discharge port, an observation device is over against the gear blank support table and is connected with a marking device, and the gear blank flaw detection positioning device further comprises a replaceable pitch measuring tool. Compared with the prior art, a simple mechanical structure is matched with an industrial camera, whether gear blanks are available or not is judged quickly, and the actual yield of gears is effectively improved on the premise that the quality of finished products is not affected.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical detection technical field, concretely relates to a gear blank flaw detection positioning device. BACKGROUND

[0002] Large gears are usually produced in the form of gear blanks, which are then processed into various types of gears. Therefore, the quality of gear blanks has a great influence on the quality of the later gears. In order to ensure the quality of the final gear product, the gear blank needs to be detected before processing in the prior art. For example, the invention patent No. CN201710190531.5 "Gear blank axial ultrasonic flaw detection surface compensation method" belongs to the field of non-destructive testing technology. After the test block is made, the straight probe is used to detect the reflection wave of each test block body and the reflection wave of the flat bottom hole, and each point is plotted in the coordinate graph. The body distance-amplitude curve and the initial flat bottom hole distance-amplitude curve are obtained by connecting each point with a smooth curve. During actual flaw detection, the workpiece bottom surface reflection amplitude is compared with the reflection amplitude of the corresponding thickness on the test block body distance-amplitude curve to obtain the surface compensation value. After the initial flat bottom hole distance-amplitude curve is compensated with the surface compensation value, the calibrated flat bottom hole distance-amplitude curve is obtained. The workpiece to be detected is detected, and after the defect is found, the defect sound path distance and the reflection amplitude are compared with the flat bottom hole amplitude at the corresponding distance on the calibrated flat bottom hole distance-amplitude curve to obtain the defect flat bottom hole equivalent. The present invention can conveniently complete the axial ultrasonic flaw detection of various types and specifications of gear blanks without carrying test blocks.

[0003] In fact, due to the influence of processing technology, there will also be some defects on the surface of the gear blank. Gear blanks with defects are usually judged as defective products and need to be remelted and reprocessed. However, during the processing of the gear blank into a gear, part of the structure of the gear blank will be removed. If the removed part completely covers the part with defects, the gear blank with defects can be made into a qualified gear. However, there is no special equipment for judgment in the prior art, especially when the gear blank has multiple discontinuous defects. It is usually difficult to determine whether such a gear blank can be made into a qualified gear. SUMMARY

[0004] The utility model discloses a kind of gear blank flaw detection positioning devices for solving the problem that whether gear blank with flaw in prior art can be used as good product in die casting molding cannot be judged.

[0005] Preferably, the observation device is a machine vision ecosystem with an industrial camera.

[0006] Preferably, the industrial camera is mounted on a movable rail through a gimbal, and the movable rail is an arc-shaped rail, with an observation position and a judgment position on both sides of the rail. The observation position is used to observe whether the gear blank has flaws, and the industrial camera will only be adjusted to the judgment position for further determination when there are multiple discontinuous flaws or a larger irregularly shaped flaw.

[0007] Preferably, the industrial camera is mounted on a movable rail, and the observation position and the judgment position are both provided with a gimbal fixed quick lock. This ensures that the industrial camera can observe in a stable position, reducing observation errors.

[0008] Preferably, the gear blank discharge port is provided with a gear blank support table, which is a uniform-speed rotating tray. The uniform-speed rotating of the rotating tray facilitates the observation of the entire gear blank side surface by the industrial camera.

[0009] Preferably, the uniform-speed rotating tray is provided with a level, and the tray adjusting device is also provided with a level. If the position is not accurate when the gear blank is taken out, it may cause the uniform-speed rotating tray to tilt. Therefore, when it is found that the uniform-speed rotating tray is not in a horizontal position, it needs to be manually adjusted.

[0010] Preferably, the tooth pitch gauge is a tooth pitch caliper, the tooth pitch caliper comprising a scale body fixed on a base and parallel to the gear blank support table, the scale body being provided with a movable block, and the movable block being provided with a shielding piece.

[0011] Preferably, the scale body is hollow. This is more convenient for observation.

[0012] Preferably, the shielding piece is provided with a boundary strip at the edge. The boundary strip is coated with a loftus paint, which is convenient for the machine vision ecosystem to more accurately identify the corresponding positions of multiple defects in the process of rotating the gear blank.

[0013] The utility model discloses the reached beneficial effects: compared with the prior art, through the relatively simple mechanical structure cooperation industry camera, whether the gear blank can be determined faster, and the gear blank of different sizes can be detected and determined without updating the software. On the premise of not affecting the quality of finished products, the actual output of the gear is effectively improved.

[0014] The above-mentioned utility model content is only the summary of the technical scheme of the utility model, in order to be able to more clearly understand the technical means of the utility model, and can be implemented according to the content of the specification, and in order to let the above-mentioned and other purposes, characteristics and advantages of the utility model can be more obvious and easy to understand, the following specific embodiment of the utility model is held. BRIEF DESCRIPTION OF DRAWINGS

[0015] Other features, objects and advantages of the utility model will become more apparent through the reading of the following detailed description of non-restrictive embodiments made with reference to the accompanying drawings. The drawings are only for the purpose of showing the preferred embodiments, and are not considered as limiting the utility model. And in the whole drawing, the same reference signs are used to indicate the same parts.

[0016] Figure 1 It is the structure schematic view of a gear blank flaw detection positioning device of the utility model.

[0017] Figure 2 It is the structure schematic view of the observation device of a gear blank flaw detection positioning device of the utility model.

[0018] Figure 3 It is the top view of a gear blank flaw detection positioning device of the utility model.

[0019] In the figure: 1, gear blank support table, 2, observation device, 3, marking device, 31, knife assembly, 32, power transmission and driving module, 33, positioning and guiding mechanism, 4, pitch gauge, 21, industrial camera, 22, gimbal, 23, movable rail, 11, constant-speed rotating tray, 12, level, 13, tray adjusting device, 41, ruler body, 42, movable block, 43, shielding piece, 44, demarcation belt

[0020] It should be noted that in order to show each part and introduce the function, the proportion of each component in the drawing and the actual product may be different, but it does not affect its use in practice. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the present application clearer, the following will further describe the present application in conjunction with the drawings and examples. It should be understood that the specific embodiments described herein are only the best mode of the present application, which are used to explain the present application and do not limit the protection scope of the present application. All other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] Before discussing the example embodiments in more detail, it should be mentioned that some example embodiments are described as processes or methods depicted as flow diagrams. Although the flow diagrams describe the operations (or steps) as sequential processes, many of the operations (or steps) can be implemented in parallel, concurrently or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operations are completed, but can also have additional steps not included in the figure; the process can correspond to a method, function, routine, subroutine, etc.

[0023] The terms "first", "second", "third", "fourth" and the like in the specification of the present application and the above drawings (if any) are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. It should also be understood that in various embodiments of the present application, the size of the serial number of each process does not mean the order of execution, and the execution order of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0024] It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the variable relationship between related objects, indicating that three relationships can exist. It should be understood that in this utility model, "B corresponding to A," "B corresponding to A," "A and B corresponding," or "B and A corresponding" means that B is associated with A, and B can be determined based on A. Determining B based on A does not mean determining B solely based on A; B can also be determined based on A and / or other information. Matching A and B is defined as a similarity between A and B that is greater than or equal to a preset threshold.

[0025] like Figure 1 As shown, this utility model discloses a gear blank flaw detection and positioning device for determining whether a gear blank can be further processed into a qualified gear. It includes a gear blank discharge port with a gear blank support platform 1, which is a uniformly rotating tray 11. The uniform rotation of the tray facilitates observation of the entire side surface of the gear blank by an industrial camera 21. The uniformly rotating tray 11 is equipped with a level 12 and a tray adjustment device 13. Since inaccurate positioning during gear blank handling may cause the uniformly rotating tray 11 to tilt, manual adjustment is required when the tray is not found to be level.

[0026] The observation device 2 faces the gear blank support platform 1. The observation device 2 is connected to the marking device 3. The marking device 3 includes a carving knife assembly 31, which is connected to the power transmission and drive module 32. The power transmission and drive module 32 has a positioning and guiding mechanism 33, which is connected to the observation device 2. It also includes a replaceable pitch gauge 4, which is fixed on a base on one side of the gear blank support platform 1.

[0027] like Figure 2 As shown, the observation device 2 is a machine vision ecosystem equipped with an industrial camera 21. In this embodiment, the industrial camera 21 developed by Hikvision Robotics is used, including GigE / 10GigE / USB3.0 and Camera Link / CoaXPress full-series interfaces. With its accompanying software, it is fully capable of fulfilling the functions described in this patent. Figure 3As shown, the industrial camera 21 is mounted on a movable rail 23 via a gimbal 22. The movable rail 23 is an arc-shaped track with observation and judgment positions on both sides, and a quick-locking mechanism for the gimbal for easy fixation. The observation position is used to observe whether the gear blank has defects. No defects are the best result, but when defects are detected, their size needs to be observed. If there is only one small defect, it is directly determined that the gear blank is usable; if a large defect is detected, the gear blank is directly determined to be unusable. Only when there are multiple discontinuous defects, or a large but oddly shaped defect, making accurate judgment impossible, will the industrial camera 21 be moved to the judgment position for further judgment. The industrial camera 21 is mounted on the movable rail 23, and both the observation and judgment positions are equipped with quick-locking mechanisms for the gimbal 22. This ensures that the industrial camera 21 observes in a stable position, reducing observation errors.

[0028] Typically, the pitch measuring tool 4 is a pitch caliper, which includes a body 41 fixed to a base and parallel to the gear blank support platform 1. The body 41 has a movable block 42, and the movable block 42 has a blocking plate 43. The size of the blocking plate 43 is replaceable; by changing the blocking plate, different target gear pitches can be simulated, thus enabling accurate identification in conjunction with the machine vision ecosystem. The body 41 is hollowed out. A standard pitch positioning ruler is used to adjust and simulate gears with different pitches. The edge of the blocking plate 43 has a dividing strip 44. The dividing strip 44 is coated with Loft studio paint, facilitating the machine vision ecosystem to more accurately identify the corresponding positions of multiple defects during the rotation of the gear blank.

[0029] During operation, the gear blank is placed from the discharge port onto the uniformly rotating tray 11 and rotates slowly and uniformly to facilitate observation by the observation device 2. The observation device 2 is positioned for observation. If the gear blank has no defects or only one small defect, the width of which is smaller than the tooth pitch of the subsequently manufactured gear, it is directly determined to be usable. If at least one large defect is detected, the width of which is greater than the tooth pitch of the subsequently manufactured gear, the gear blank is directly determined to be unusable. When multiple defects are detected on the surface of the gear blank, the observation device 2 needs to be moved to the judgment position to locate the defect with the largest area. The marking device 3 draws a tangent perpendicular to the upper and lower edges of the gear blank with the right edge of the defect. The end of the tooth pitch caliper 41 is aligned with the tangent, and the movable block 42 is adjusted so that the blocking plate 43 corresponds exactly to one tooth pitch. Although the tooth pitch caliper is a straight ruler while the surface of the gear blank is curved, because the ruler 41 is fixed on the base and parallel to the gear blank support platform 1, a relatively accurate distance can still be mapped through proportional conversion. The gear pitch caliper determines the first gear machining position during gear machining. Based on the first machining position, the gear blank is rotated. Since the rotation speed is uniform, the observation device 2 observes whether the remaining defects on the gear blank are blocked by the shielding plate 43 according to the unit multiple of time. If they are blocked, it means that these defects can be eliminated in the subsequent machining process. Otherwise, the gear blank cannot be made into a qualified gear.

[0030] This structure allows for easy visual judgment and convenient adjustment of tooth spacing without the need for reprogramming, thus adapting to gear switching of various types of gears. It is especially suitable for gears with multiple models, such as... Figure 1 Select usable products from the defective gear blanks shown.

[0031] The above-described specific embodiments are preferred embodiments of the gear blank flaw detection and positioning device of this utility model, and are not intended to limit the specific scope of implementation of this utility model. The scope of this utility model includes but is not limited to the specific embodiments described above. All equivalent changes made in accordance with the shape and structure of this utility model are within the protection scope of this utility model.

Claims

1. A gear blank flaw detection and positioning device, characterized in that, The device includes a gear blank discharge port with a gear blank support platform. An observation device is positioned opposite the gear blank support platform. The observation device is connected to a marking device, which includes a carving knife assembly connected to a power transmission and drive module. The power transmission and drive module has a positioning and guiding mechanism connected to the observation device. The device also includes a replaceable pitch gauge, which is fixed to a base on one side of the gear blank support platform.

2. The gear blank flaw detection and positioning device according to claim 1, characterized in that, The observation device is a machine vision ecosystem equipped with industrial cameras.

3. The gear blank flaw detection and positioning device according to claim 2, characterized in that, The industrial camera is mounted on a movable rail via a gimbal. The movable rail is an arc track with observation and judgment positions on both sides.

4. The gear blank flaw detection and positioning device according to claim 3, characterized in that, Both the observation position and the judgment position are equipped with gimbal fixing quick locks.

5. The gear blank flaw detection and positioning device according to claim 1, characterized in that, The gear blank support platform at the gear blank outlet is a uniformly rotating tray.

6. The gear blank flaw detection and positioning device according to claim 5, characterized in that, The uniformly rotating tray is equipped with a level, and a tray adjustment device is also provided based on the level.

7. The gear blank flaw detection and positioning device according to claim 1, characterized in that, The tooth pitch measuring tool is a tooth pitch caliper. The tooth pitch caliper includes a scale body, which is fixed on the base and parallel to the gear blank support platform. A movable block is provided on the scale body, and a blocking plate is provided on the movable block.

8. The gear blank flaw detection and positioning device according to claim 7, characterized in that, The ruler is hollowed out.

9. A gear blank flaw detection and positioning device according to claim 7, characterized in that, The edge of the shielding plate is provided with a dividing zone.

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