A multi-degree-of-freedom on-machine detection device for surface defects of a tool turret integrated type numerical control turning tool

Abstract

The application discloses a kind of cutter tower integrated type numerical control tool bit surface defect multi-degree-of-freedom on-machine detection device, including multi-degree-of-freedom adjusting system, visual detection system and accessory structure.The application adopts integrated design, and the tool bit surface defect on-machine detection device is integrated to the cutter tower, can be detected while not affecting the progress of cutting machining.By integrating the device on the cutter tower, the problem of complex size of existing method device is solved.The application designs a multi-degree-of-freedom adjusting system, which can realize the device detection position switching function, can detect the tool in different tool grooves of the cutter tower, and can detect the device when detecting, and the device is retracted without interfering with the normal cutting of the tool when the tool is working.The device can be removed when detecting other position tools.The application has multiple degrees of freedom, can detect tools of different sizes and clearance angles, and can detect tools in different tool grooves without interfering with the cutting process.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of tool defect detection, and relates to a multi-degree-of-freedom on-machine detection device for surface defects of a turret integrated numerical control turning tool. BACKGROUND

[0002] With the rapid development of science and technology, the requirements for product quality in the manufacturing field are also higher and higher, and high-precision and high-quality products have become an indispensable part of producing high-end equipment. As a key part of a lathe, the quality of a turning tool directly affects the machining quality of products. Good tool state can make the machining efficiency, yield and quality high. Therefore, the detection of tool surface defects plays a crucial role in product quality control in the manufacturing process. The traditional tool surface defect detection is mainly artificial visual inspection, that is, the tool surface defects are directly observed by the naked eye or the tool is placed under a microscope for manual measurement of tool defect size to judge whether the tool is qualified or whether the tool can be used for further machining. This process is time-consuming and labor-intensive, and increases the equipment downtime. The on-machine detection of tool surface defects can avoid unqualified tools from participating in the cutting process, and thus is of great significance for high-quality machining of workpieces.

[0003] At present, there is still a lack of in-machine detection device applied to the tool turret in the field of tool detection. Although the existing tool surface defect detection device can detect tools in-machine, the detection device has a complex structure, detects a single type of tool, is prone to interference problems during machining, and does not actually consider the protection of the device in the complex machining environment of the machine tool. Patent CN 105345599 B discloses a turning tool flank wear in-situ detection device, which has a multi-degree-of-freedom adjustment function, can realize vertical positioning of the lens and the imaging plane, and ensures image quality. However, the device is installed on the lathe support plate, the lens is very close to the tool, interferes with the machining process, and has no lens protection measures. Patent CN 110355607 B discloses a visual detection system for the wear state of a turning tool of a machining center. The system obtains point cloud data of the tool by cooperation of a CCD camera and a laser, and realizes rapid judgment of tool damage and acquisition of tool radial size during measurement through real-time processing. However, the installation position of the device is far from the tool, the camera needs to have a large focal length, the camera field of view and depth of field are extremely small, which puts forward higher requirements for the selection of the camera and the adjustment of the device. Patent CN 112045497 B discloses a tool full-automatic focusing in-machine detection system and method based on machine vision. The device can collect and detect the images of the tool flanks and sub-tool flanks of each tool edge of a drill and mill tool, and has a full-automatic focusing function. However, the device needs to be installed by modifying the machine tool to a certain extent, and has a large size and a complex structure, requiring sufficient space inside the machine tool. The detection device needs a certain time to move from the original position to the detection position, causing a decrease in detection efficiency. SUMMARY

[0004] In view of the above problems or improvement needs of the prior art, the present application provides a tool turret integrated numerical control turning tool surface defect multi-degree-of-freedom in-machine detection device, and achieves the following purposes:

[0005] 1. The existing method and device are complex and large in size, and can detect tools of different grooves without interfering with the cutting process.

[0006] 2. The detection position of the existing method is fixed, and the detection tool type is single.

[0007] 3. The protection of the industrial camera lens is solved.

[0008] In order to achieve the above purposes, the technical scheme of the present application is as follows: a tool turret integrated numerical control turning tool surface defect multi-degree-of-freedom in-machine detection device, comprising a multi-degree-of-freedom adjustment system, a visual detection system and an auxiliary structure.

[0009] The multi-degree-of-freedom adjusting system comprises an R-axis sliding table, a right-angle plate B, an XYR platform, a right-angle plate C, a precision electric rotary table, an adapter plate and an electric guide rail; the R-axis sliding table is connected with the visual detection system, and is used for realizing the rotary motion of the visual detection system around the Y axis; the R-axis sliding table is connected with the XYR platform through the right-angle plate B, and the XYR platform is used for adjusting the movement of the visual detection system in the Z axis and Y axis directions and the rotation of the visual detection system around the X axis direction; the XYR platform is fixed on the electric guide rail through the right-angle plate C; the electric guide rail is connected with the precision electric rotary table, and the electric guide rail and the precision electric rotary table are matched and used for realizing the translation and rotation of the overall position of the visual detection system, so as to detect the tool surface at different positions; the precision electric rotary table is installed on the tool tower through the adapter plate; the tool tower is provided with a tool bar; and the tool bar is fixed in a tool groove of the tool tower through a mounting block.

[0010] The visual detection system comprises a connecting plate, a right-angle plate A, a movable right-angle plate, an industrial camera, a light source, a telecentric lens, an aperture mechanism and a snap ring; the industrial camera is fixedly connected with the right-angle plate A, the right-angle plate A is fixedly connected with the connecting plate, and the connecting plate is connected with the R-axis sliding table; the movable right-angle plate is installed on the connecting plate and is used for adjusting the movement of the light source in the Z axis direction; the industrial camera realizes multi-angle shooting sampling of the tool relief surface; the light source provides illumination for the shooting of the industrial camera; the aperture mechanism is installed on the telecentric lens through the snap ring; the aperture mechanism realizes protection of the telecentric lens; and the end surface of the electric guide rail is provided with a sliding groove, and the sliding groove is used for opening the aperture in cooperation with the aperture mechanism during work and closing the aperture after work.

[0011] The accessory structure comprises a protective cover, a protective cover shell and a motor; the protective cover shell is installed on the electric guide rail; the motor is installed on the protective cover shell and is used for driving the protective cover to rotate to open and close; and the protective cover is used for realizing protection of the visual detection system.

[0012] Further, the mounting end of the movable right-angle plate has a groove, and the position of the movable right-angle plate is adjusted by manually adjusting the position of a bolt in the groove.

[0013] Further, the sliding groove has a groove, the end surface of the aperture mechanism has an adjusting rod, and during the process that the visual detection system enters a working position, the adjusting rod makes a cycloid motion in the groove and thus rotates to open the aperture.

[0014] Compared with the prior art, the present application mainly has the following technical advantages:

[0015] 1. The present application adopts integrated design, integrates the tool surface defect in-machine detection device to the tool tower, can detect in-machine at the same time without affecting the cutting process. By integrating the device on the tool tower, the problem of complex size of the existing method device is solved.

[0016] 2. The application designs a multi-degree of freedom adjusting system, which can realize the device detection position switching function, can detect the tool in different tool grooves of the tool tower, can realize that the device is stretched out in front of the tool to be detected during detection, the device is retracted when the tool works without interfering with the normal cutting of the tool. It can avoid disassembling the device when detecting other position tools.

[0017] 3. The device has multiple degrees of freedom, can detect tools of different sizes and clearance angles, and has a wide range of applications. It can detect tools in different tool grooves without interfering with the cutting process, solving the problem of fixed detection position and single detection tool type of existing methods.

[0018] 4. The device has simple structure and is easy to install, and can realize fast and efficient detection. By designing a shutter mechanism, the protection problem of the industrial camera lens is solved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the device axis view of the embodiment one of the application;

[0020] Figure 2 is the main view of the visual detection system of the device of the embodiment one of the application;

[0021] Figure 3 is the axis view of the protection cover opening after the device protection cover of the embodiment two of the application is installed;

[0022] Figure 4 is the axis view of the protection cover closing after the device protection cover of the embodiment two of the application is installed;

[0023] Figure 5 is the opening schematic view of the aperture mechanism of the application;

[0024] Figure 6 is the closing schematic view of the aperture mechanism of the application.

[0025] In the figure: 1-slideway; 2-light source; 3-movable right-angle plate; 4-telecentric lens; 5-connection plate; 6-R-axis sliding table; 7-tool tower; 8-tool bar; 9-mounting block; 10-right-angle plate A; 11-industrial camera; 12-XYR platform; 13-right-angle plate C; 14-electric guide rail; 15-right-angle plate B; 16-precision electric rotary table; 17-adaptor plate; 18-clamp ring; 19-aperture mechanism; 20-protection cover; 21-protection cover shell, 22-motor. DETAILED DESCRIPTION

[0026] The technical solutions of the present application will be described in further detail below in conjunction with specific embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts should fall within the protection scope of the present application.

[0027] As shown in Figure 1 , the present application is a kind of tool turret integrated numerical control turning tool surface defect multi-degree-of-freedom on-machine detection device, which comprises a multi-degree-of-freedom adjusting system and a visual detection system. The multi-degree-of-freedom adjusting system can adjust the detection position of the visual detection system to detect the tools in different tool grooves on the tool turret, and can also realize the multi-degree-of-freedom adjustment of the industrial camera in the visual detection system to take pictures of tools of different sizes and clearance angles. The industrial camera of the visual detection system can take high-precision pictures of the tool flank face, clearance angle and tool tip wear. The light source 2 can move along the direction of the telecentric lens 4 to adjust the distance between the light source 2 and the tool to be detected. As shown in Figure 3 , the protective cover shell 21 is installed on the electric guide rail, and the protective cover 20 is driven to rotate by the motor 22 to open and close, which can protect the visual detection system from being contaminated.

[0028] The main components of the present application will be described one by one as follows.

[0029] As shown in Figure 1 , the multi-degree-of-freedom adjusting system comprises an R-axis sliding table 6, a right-angle plate B15, an XYR platform 12, a right-angle plate C13, a precision motorized turntable 16, an adapter plate 17 and an electric guide rail 14. The multi-degree-of-freedom adjusting system is used to adjust the position of the visual detection system and the specific position of the industrial camera 11. The visual detection system is connected to the right-angle plate B15 through the R-axis sliding table 6. The R-axis sliding table 6 is used to adjust the rotation of the visual detection system around the Y-axis direction to adjust the shooting angle of the industrial camera 11. The R-axis sliding table 6 is connected to the XYR platform 12 through the right-angle plate B15. The XYR platform 12 is used to adjust the movement of the visual detection system in the Z-axis and Y-axis directions and the rotation of the visual detection system around the X-axis direction, which can adjust the angle and position of the industrial camera 11 relative to the tool to be detected, facilitate focusing and improve the quality of picture taking. The XYR platform 12 is fixed on the electric guide rail 14 through the right-angle plate C13. The electric guide rail 14 is used to make the visual detection system extend to the vicinity of the tool to be detected during detection and retract during tool machining to prevent interference with the tool cutting process. The electric guide rail 14 is connected to the precision motorized turntable 16. The precision motorized turntable 16 can adjust the rotation of the electric guide rail 14 around the Z-axis, so that the visual detection system can detect tools at different positions on the tool turret 7. The precision motorized turntable is installed in a tool groove of the tool turret 7 through the adapter plate 17, so that the on-machine detection device is integrated into the tool turret 7.

[0030] In this embodiment, the multi-degree-of-freedom adjustment system is configured as follows: the R-axis sliding table 6 is of the RS60-R type, the table size is 60 mm, the adjustment accuracy is 360° coarse adjustment and ±5° fine adjustment; the XYR platform 12 is of the LS60-LM type, the table size is 60 mm, the R-axis adjustment accuracy is 360° coarse adjustment and ±5° fine adjustment, and the X and Y axis adjustment accuracy is ±6.5 mm; and the precision motorized turntable 16 is of the WMD50-30H type, the turntable diameter is 50 mm, the maximum speed is 160° / s, and the positioning accuracy is ±0.05°.

[0031] As shown in Figure 2 , the visual detection system comprises a connecting plate 5, a right-angle plate A10, a movable right-angle plate 3, an industrial camera 11, a light source 2, a telecentric lens 4, an aperture mechanism 19 and a snap ring 18. The industrial camera 11 is connected with the R-axis sliding table 6 through the right-angle plate A10 and the connecting plate 5, and further connected with the multi-degree-of-freedom adjustment system. The light source 2 is installed on the connecting plate 5 through the movable right-angle plate 3, and can realize the movement of the light source 2 along the lens direction of the industrial camera 11, and further adjust the distance between the light source 2 and the surface of the tool to be detected, so as to improve the photo shooting quality. The telecentric lens 4 is installed on the industrial camera 11, which can reduce the image distortion rate and ensure the imaging quality. As shown in Figure 1 , the sliding groove 1 is installed on the end surface of the motorized guide rail 14, and the sliding groove 1 has a groove, so that the adjusting rod of the aperture mechanism can do a cycloid motion therein, and further realize the opening and closing of the aperture; as shown in Figure 2 , the aperture mechanism 19 is installed on the telecentric lens 4 through the snap ring 18, and cooperates with the sliding groove 1 to open the aperture when the visual detection system is stretched out, and close the aperture when the visual detection system is retracted, so as to protect the telecentric lens 4 and prevent the telecentric lens 4 from being contaminated.

[0032] In this embodiment, the visual detection system is configured as follows: the industrial camera 11 is of the MV-CS060-10GM type, the telecentric lens 4 is of the MVL-MY-2-65-MP type, and the light source 2 is of the HL-RDO-90-4-W type. The image accuracy of the collected tool surface defect image is mainly ensured by the telecentric lens with a target size of 1 / 1.8”, an object distance of 65 mm, a depth of field of 0.3 mm and a maximum imaging range of 3.69 mm*2.46 mm, and the industrial camera with a resolution of 3072 pixel*2048 pixel and a pixel size of 2.4 μm*2.4 μm.

[0033] The above-described embodiments only express the implementation manners of the present application, but cannot be understood as the limitation of the scope of the present application patent. It should be pointed out that, for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A turret-integrated CNC turning tool surface defect multi-degree-of-freedom on-machine inspection device, characterized in that: It comprises a multi-degree-of-freedom adjusting system, a visual detection system and an auxiliary structure. The multi-degree-of-freedom adjusting system comprises an R-axis sliding table (6), a right-angle plate B (15), an XYR platform (12), a right-angle plate C (13), a precision electric rotary table (16), an adapter plate (17) and an electric guide rail (14); the R-axis sliding table (6) is connected with the visual detection system, and is used for realizing the rotary motion of the visual detection system around the Y axis; the R-axis sliding table (6) is connected with the XYR platform (12) through the right-angle plate B (15), and the XYR platform (12) is used for adjusting the movement of the visual detection system in the Z axis and Y axis directions and the rotation of the visual detection system around the X axis direction; the XYR platform (12) is fixed on the electric guide rail (14) through the right-angle plate C (13); the electric guide rail (14) is connected with the precision electric rotary table (16), and the electric guide rail (14) and the precision electric rotary table (16) are used for realizing the translation and rotation of the overall position of the visual detection system to detect the tool surface at different positions; the precision electric rotary table (16) is installed on a tool tower (7) through the adapter plate (17); a tool bar (8) is installed on the tool tower (7); and the tool bar (8) is fixed in a tool slot of the tool tower (7) through a mounting block (9). The visual detection system comprises a connecting plate (5), a right-angle plate A (10), a movable right-angle plate (3), an industrial camera (11), a light source (2), a telecentric lens (4), an aperture mechanism (19) and a snap ring (18); the industrial camera (11) is fixedly connected with the right-angle plate A (10), the right-angle plate A (10) is fixedly connected with the connecting plate (5), and the connecting plate (5) is connected with the R-axis sliding table (6); the movable right-angle plate (3) is installed on the connecting plate (5) and is used for adjusting the movement of the light source (2) in the Z axis direction; the industrial camera (11) realizes the multi-angle shooting sampling of the tool relief surface; the light source (2) provides illumination for the shooting of the industrial camera (11); the aperture mechanism (19) is installed on the telecentric lens (4) through the snap ring (18); the aperture mechanism (19) realizes the protection of the telecentric lens (4); and a sliding groove (1) is installed on the end face of the electric guide rail (14), and the sliding groove (1) is used for opening the aperture in cooperation with the aperture mechanism (19) during work and closing the aperture after work. The auxiliary structure comprises a protective cover (20), a protective cover shell (21) and a motor (22); the protective cover shell (21) is installed on the electric guide rail (14); the motor (22) is installed on the protective cover shell (21) and is used for driving the protective cover (20) to rotate to open and close; and the protective cover (20) is used for realizing the protection of the visual detection system. The sliding groove (1) has a recess, the end face of the aperture mechanism (19) has an adjusting rod, and during the process of the visual detection system entering the working position, the adjusting rod makes a cycloid motion in the recess to rotate and open the aperture.

2. The surface defect multi-degree-of-freedom in-situ detection device for the tool turret integrated numerical control turning tool according to claim 1, characterized in that: The mounting end of the movable right-angle plate (3) has a recess, and the position of the movable right-angle plate (3) is adjusted by manually adjusting the position of the bolt in the recess.

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