Screw tap quality detection device

Abstract

The utility model discloses a screw tap quality detection device which comprises a base station, a base used for bearing a workpiece is arranged on the top of the base station, a carrying column is axially inserted in the top of the base, a detection assembly used for screw tap quality detection is installed on the top of the carrying column, and an operating rod concentric with the carrying column is axially and movably inserted in the bottom of the base station. The carrying column can guide the detection assembly to extend out of the top of the base so as to move to the inner side of the workpiece and perform circumferential rotation movement around the inner side of the workpiece under the action of driving the operation rod to move upwards in the axial direction, the base, the base, the operation rod, the detection assembly and the like are arranged, the detection assembly can extend out and rotate only by pushing the operation rod in the axial direction, and the detection efficiency is improved. Therefore, quality detection of workpiece inner side tapping can be conveniently and efficiently completed, and stability and reliability are achieved.

Description

Technical Field

[0001] This utility model relates to a testing device, and more particularly to a tap quality testing device. Background Technology

[0002] A tap is a tool used to machine internal threads. It has grooves along the axial direction and is also called a screw tap. It is used to machine ordinary internal threads on nuts or other machine parts (i.e., tapping). Machine taps usually refer to high-speed steel ground thread taps, which are suitable for tapping on machine tools; hand taps refer to carbon tool steel or alloy tool steel rolled (or cut) thread taps, which are suitable for tapping by hand.

[0003] A tap is a tool used to machine various small and medium-sized internal threads. It has a simple structure and is easy to use. It can be operated manually or on a machine tool and is widely used in production. For small-sized internal threads, a tap is almost the only machining tool.

[0004] Tapping is a relatively difficult machining process because the tap is almost embedded in the workpiece during cutting. Therefore, after tapping, the internal threads in the hole need to be inspected for quality. Traditionally, this is done manually by visual inspection. However, due to human factors, the inspection range of the tap inside the hole is not comprehensive, resulting in blind spots and affecting the quality of the tapped product. Utility Model Content

[0005] To address the technical problems mentioned in the background section, this utility model provides a tap quality detection device.

[0006] This utility model is achieved using the following technical solution: a tap quality inspection device, comprising a base, a base for supporting a workpiece is provided on the top of the base, a carrier column is axially inserted on the top of the base, a detection component for tap quality inspection is installed on the top of the carrier column, and an operating rod concentric with the carrier column is axially movably inserted at the bottom of the base. The carrier column is driven by the axial upward movement of the operating rod, which can guide the detection component to extend out of the top of the base to move to the inside of the workpiece and rotate circumferentially around the inside of the workpiece.

[0007] As a further improvement to the above solution, the detection component includes a CCD camera and a data processor. The CCD camera is mounted on the top of the support column and is used to capture machine vision images of the tap inside the workpiece. The data processor is signal-connected to the CCD camera, and the data processor detects the defect location of the tap inside the workpiece based on the acquired machine vision images.

[0008] As a further improvement to the above solution, a cylindrical body concentric with the support column is rotatably installed inside the base, with the top and bottom of the cylindrical body respectively fitted onto the bottom of the support column and the top of the operating rod.

[0009] The inner side of the cylinder is provided with, from bottom to top, a first axially extending limiting groove, a second axially spiral-shaped limiting groove, and an axially extending sliding groove. The top end of the first limiting groove is connected to the bottom end of the second limiting groove.

[0010] The outer wall of the operating rod is provided with a limiting block that slides and engages with the first limiting groove and the second limiting groove, and the outer wall of the carrier column is provided with a slider that engages with the sliding groove.

[0011] The top of the operating lever is fixed with a first connecting rod, and the top of the first connecting rod is rotatably mounted at the bottom of the support column.

[0012] As a further improvement to the above solution, the base is provided with a through hole for accommodating the detection component.

[0013] As a further improvement to the above solution, a first conical tooth is fixedly sleeved on the outer side of the cylinder. Two radially extending lead screws are rotatably arranged inside the base. The ends of the two lead screws that are close to each other are provided with a second conical tooth that cooperates with the first conical tooth. Two axially extending movable arms are arranged opposite each other on the top of the base. The bottom of the two movable arms extends into the base and is threaded onto the outer side of the two lead screws respectively. A second connecting rod is provided on the opposite side of the two movable arms. A clamping plate is provided at the ends of the two second connecting rods that are close to each other. A clamping space for workpiece positioning is formed between the two clamping plates.

[0014] As a further improvement to the above solution, the top of the base is symmetrically provided with two third limiting grooves parallel to the lead screw, the bottoms of the two moving arms are respectively slidably locked in the two third limiting grooves, and the two lead screws are respectively inserted into the two third limiting grooves.

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

[0016] 1. The tap quality inspection device of this utility model, by setting up a base, a base, an operating rod, and an inspection component, only requires axial pushing of the operating rod to make the inspection component extend and rotate, so as to conveniently and efficiently complete the quality inspection of tapping on the inner side of the workpiece, which is stable and reliable.

[0017] 2. When not in use, the tap quality inspection device of this utility model can house the CCD camera in the through hole of the base, thus providing a protective effect. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the structure of the present invention in a positioning and detection state.

[0019] Figure 2 for Figure 1 A schematic diagram of a partial cross-sectional structure;

[0020] Figure 3 for Figure 1 A schematic diagram of a local cross-sectional structure in a non-positioning detection state;

[0021] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0022] Figure 5 for Figure 2 A schematic diagram of the distribution of the first limiting groove, the second limiting groove, and the sliding groove after the middle cylinder is unfolded.

[0023] Explanation of key symbols:

[0024] 1. Base; 2. Base; 3. Operating lever; 4. Cylinder; 5. Limiting block; 6. First limiting groove; 7. Second limiting groove; 8. Carrier column; 9. First connecting rod; 10. Slide groove; 11. Slider; 12. CCD camera; 13. First bevel gear; 14. Lead screw; 15. Second bevel gear; 16. Moving arm; 17. Second connecting rod; 18. Clamping plate; 19. Third limiting groove; 100. Workpiece. Detailed Implementation

[0025] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] Please combine Figures 1 to 5 The tap quality inspection device includes a base 1, a base 2 for supporting a workpiece 100 is provided on the top of the base 1, a carrier column 8 is axially inserted on the top of the base 2, and an inspection component for tap quality inspection is installed on the top of the carrier column 8. An operating rod 3 concentric with the carrier column 8 is axially movably inserted at the bottom of the base 1. The carrier column 8 is driven by the axial upward movement of the operating rod 3, which can guide the inspection component to extend out of the top of the base 2 to move to the inside of the workpiece 100 and rotate around the inside of the workpiece 100 to perform multi-directional inspection of the tap inside the workpiece 100.

[0027] The detection component includes a CCD camera 12 and a data processor. The CCD camera 12 is mounted on the top of the carrier column 8 and is used to capture machine vision images of the inner tap of the workpiece 100. The data processor is connected to the CCD camera 12 by signal. The data processor detects the defect location of the inner tap of the workpiece 100 based on the acquired machine vision images.

[0028] CCD camera 12 is short for charge-coupled device, which can convert light into electric charge, store and transfer the charge, and also retrieve the stored charge to change the voltage. Therefore, it is an ideal CCD camera element. CCD cameras made of it are widely used because they are small in size, light in weight, unaffected by magnetic fields, and resistant to vibration and impact. In this embodiment, CCD camera 12 is used to capture machine vision images of the inner tap of workpiece 100. CCD camera 12 is mounted on the top of carrier post 8. The mounting end of CCD camera 12 can be mounted on carrier post 8 with screws, and the shooting angle of CCD camera 12 is adjusted to the corresponding direction.

[0029] The data processor includes an image acquisition card and terminal equipment.

[0030] An image acquisition card is a hardware device that can acquire, store, and play back digital video image information.

[0031] In this embodiment, the terminal device can be a computer; in other embodiments, it can be a mobile phone. In this embodiment, the terminal device is a computer, and a linear motor can be installed at the bottom of the base 1. The output shaft of the linear motor is connected to the bottom of the operating lever 3. The computer can control the operation of the linear motor to adjust the axial movement of the operating lever 3 on the base 1.

[0032] In this embodiment, the image acquisition card can acquire machine vision images captured by the CCD camera 12 and convert them into original images of the tapping inside the workpiece 100. The original images are then sent to a computer for defect identification, requiring a large amount of information to be processed. To improve detection accuracy, image preprocessing is necessary. This preprocessing primarily removes irrelevant or minimally relevant information, retains relevant information, and simplifies image data. Filtering, sharpening, and feature extraction can be employed. After sharpening, the contrast of the original image is enhanced, and the contours are clearer, facilitating edge extraction. Visionscape software can be used on the computer to automatically identify the shape and location of defects. Simply input the required values, and this tool can process the image, marking the defects for analysis. The defect location is outlined in green, and the gradient value of the specific defect location is displayed, making it easier to observe the defect location of the tapping inside the workpiece 100.

[0033] Using this method to inspect the tapping inside the workpiece 100 has the following advantages: clear images, high inspection accuracy, and greatly improved inspection speed.

[0034] A cylindrical body 4, concentric with the support column 8, is rotatably mounted inside the base 1. The top and bottom of the cylindrical body 4 are respectively fitted onto the bottom of the support column 8 and the top of the operating rod 3.

[0035] The inner side of the cylinder 4 is provided with an axially extending first limiting groove 6, an axially spiral-shaped second limiting groove 7, and an axially extending sliding groove 10, which are sequentially opened from bottom to top. The top end of the first limiting groove 6 is connected to the bottom end of the second limiting groove 7.

[0036] The outer wall of the operating lever 3 is provided with a limiting block 5 that slides and engages with the first limiting groove 6 and the second limiting groove 7, and the outer wall of the carrier column 8 is provided with a slider 11 that engages with the sliding groove 10.

[0037] The top of the operating lever 3 is fixed with a first connecting rod 9, and the top of the first connecting rod 9 is rotatably set at the bottom of the carrier column 8.

[0038] The base 2 has a through hole for accommodating the detection component.

[0039] A first bevel tooth 13 is fixedly sleeved on the outer side of the cylinder 4. Two radially extending lead screws 14 are rotatably arranged inside the base 1. The ends of the two lead screws 14 that are close to each other are provided with second bevel teeth 15 that cooperate with the first bevel tooth 13. Two axially extending movable arms 16 are arranged opposite each other on the top of the base 1. The bottom of the two movable arms 16 extends into the base 1 and is threaded onto the outside of the two lead screws 14 respectively. The opposite sides of the two movable arms 16 are provided with second connecting rods 17. The ends of the two second connecting rods 17 that are close to each other are provided with clamping plates 18. A clamping space for positioning the workpiece 100 is formed between the two clamping plates 18.

[0040] The top of the base 1 is symmetrically provided with two third limiting grooves 19 parallel to the lead screw 14 about the base 2. The bottoms of the two moving arms 16 are respectively slidably locked in the two third limiting grooves 19, and the two lead screws 14 are respectively inserted into the two third limiting grooves 19.

[0041] The working principle of this embodiment:

[0042] The workpiece 100 to be tested is placed on the top of the base 2. Then, the operating lever 3 is moved upward axially. Under the limiting action of the limiting block 5 and the first limiting groove 6, the operating lever 3 drives the first connecting rod 9, the carrier column 8 and the CCD camera 12 to move upward axially synchronously (at this time, the cylinder 4 does not rotate, while the carrier column 8 moves axially relative to the cylinder 4 under the limiting action of the slider 11 and the slide groove 10).

[0043] When the limiting block 5 moves to the junction of the first limiting groove 6 and the second limiting groove 7, the CCD camera 12 protrudes to the outside of the top of the base 2 (i.e., it is located in the inner hole of the workpiece 100).

[0044] The operating lever 3 continues to push, causing the limiting block 5 to rub and squeeze the wall of the second limiting groove 7, which is spiral in shape along the axis, forcing the cylinder 4 to rotate. The cylinder 4 rotates through the first bevel tooth 13, the second bevel tooth 15, and the lead screw 14, so that the two lead screws 14 interact with the two moving arms 16 respectively. Under the limiting action of the third limiting groove 19, the two moving arms 16 drive the two clamping plates 18 to move closer to each other through the second connecting rod 17, so as to complete the positioning of the workpiece 100 before inspection. It can also keep the inner hole of the workpiece 100 and the top through hole of the base 2 in the center position, so as to ensure the accuracy of the machine vision image captured by the CCD camera 12. During this period, due to the presence of the slider 11 and the slide groove 10, the cylinder 4 can rotate while driving the carrier column 8 and the CCD camera 12 to rotate synchronously, so as to acquire machine vision images of the inner tapping of the workpiece 100 from multiple directions, which facilitates the subsequent transmission to the data processor for inspection data processing.

[0045] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A tap quality detection device, characterized by, The device includes a base, a top of which is provided with a base for supporting a workpiece. A carrier column is axially inserted into the top of the base, and a detection component for tap quality inspection is installed on the top of the carrier column. An operating rod concentric with the carrier column is axially movably inserted into the bottom of the base. The carrier column is driven by the axial upward movement of the operating rod, which guides the detection component to extend out of the top of the base and move to the inside of the workpiece, and to rotate circumferentially around the inside of the workpiece.

2. The tap quality detection device according to claim 1, wherein The detection component includes a CCD camera and a data processor. The CCD camera is mounted on the top of the support column and is used to capture machine vision images of the tap inside the workpiece. The data processor is connected to the CCD camera by a signal. The data processor detects the defect location of the tap inside the workpiece based on the acquired machine vision images.

3. The tap quality detection device of claim 1, wherein The base has a rotatable cylindrical body concentric with the support column, with the top and bottom of the cylindrical body respectively fitted onto the bottom of the support column and the top of the operating rod. The inner side of the cylinder is provided with, from bottom to top, a first axially extending limiting groove, a second axially spiral-shaped limiting groove, and an axially extending sliding groove. The top end of the first limiting groove is connected to the bottom end of the second limiting groove. The outer wall of the operating rod is provided with a limiting block that slides and engages with the first limiting groove and the second limiting groove, and the outer wall of the carrier column is provided with a slider that engages with the sliding groove. The top of the operating lever is fixed with a first connecting rod, and the top of the first connecting rod is rotatably mounted at the bottom of the support column.

4. The tap quality detection device as described in claim 1, characterized in that, The base has through holes for accommodating the detection components.

5. The tap quality detection device of claim 3, wherein The outer side of the cylinder is fitted with a first bevel tooth. Inside the base, two radially extending lead screws are rotatably arranged. The ends of the two lead screws that are close to each other are provided with a second bevel tooth that mates with the first bevel tooth. The top of the base is provided with two axially extending movable arms. The bottom of the two movable arms extends into the base and is threaded onto the outer side of the two lead screws respectively. The opposite sides of the two movable arms are provided with a second connecting rod. The ends of the two second connecting rods that are close to each other are provided with a clamping plate. A clamping space for workpiece positioning is formed between the two clamping plates.

6. The tap quality detection device of claim 5, wherein The top of the base is symmetrically provided with two third limiting grooves parallel to the lead screw. The bottoms of the two moving arms are respectively slidably locked in the two third limiting grooves, and the two lead screws are respectively inserted into the two third limiting grooves.

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