Non-contact measurement of multi-stage inner diameter of stepped deep through hole metal part

Abstract

The utility model relates to a step-shaped deep through hole metal part multi-stage inner diameter non-contact measurement device, and belongs to the field of step-shaped deep through hole metal parts. Comprising a shading box, a box door hinged to the exterior of the shading box, a PLC fixedly installed on the exterior of the shading box, an industrial camera arranged in the shading box, an installation box arranged in the shading box and an installation base fixedly connected to the inner bottom wall of the shading box, and a lifting mechanism extending to the exterior of the installation box is arranged in the installation box; and a rotary switching mechanism extending to the outside of the mounting seat is arranged in the mounting seat. According to the non-contact measurement of the multistage inner diameter of the stepped deep through hole metal part, the servo motor is started to work through the PLC to drive the industrial camera and the light source to move, the probing depth and angle of the light source are controlled, the metal part is used for machining a fillet to reflect light, and the industrial camera obtains a clear deep hole boundary image; non-contact measurement is carried out on metal parts of different sizes, and the advantage of high measurement precision is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of stepped deep through-hole metal parts, specifically to a non-contact measurement of the multi-level inner diameter of stepped deep through-hole metal parts. Background Technology

[0002] A stepped deep through-hole metal part is a metal component with a special structure, characterized by having multiple stepped through holes of different diameters inside the part.

[0003] In the production of stepped deep-hole metal parts, non-contact measurement of the multi-level inner diameter of these parts is required. Accurate measurement of the inner diameter of metal parts is crucial during machining and quality inspection, especially for stepped deep-hole parts. Traditional contact measurement methods struggle to obtain clear boundary images when using traditional lighting techniques due to the smooth, often mirror-reflective, surfaces of stepped deep-hole metal parts. This poses a significant challenge to vision-based non-contact measurement methods and fails to meet production requirements. Therefore, this paper proposes a non-contact measurement method for the multi-level inner diameter of stepped deep-hole metal parts to address the aforementioned problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a non-contact measurement method for multi-level inner diameters of stepped deep-hole metal parts. It has the advantages of high measurement accuracy and strong practicality. It solves the problem that existing contact measurement methods often suffer from mirror reflection due to the smooth surface of stepped deep-hole metal parts, making it difficult to obtain clear and distinguishable boundary images when using traditional methods for lighting and imaging. This poses a significant challenge to vision-based non-contact measurement methods and fails to meet production needs.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a non-contact measurement of the multi-level inner diameter of a stepped deep through-hole metal part, comprising a light-shielding box, a door hinged to the outside of the light-shielding box, a PLC controller fixedly installed outside the light-shielding box, an industrial camera installed inside the light-shielding box, a mounting box installed inside the light-shielding box, and a mounting base fixedly connected to the bottom wall of the light-shielding box. The mounting box is provided with a lifting mechanism extending to its outside, and the mounting base is provided with a rotation switching mechanism extending to its outside.

[0006] The lifting mechanism includes a servo motor fixedly mounted on the top of the mounting box, a threaded rod fixedly connected to the output shaft of the servo motor, a moving block threadedly connected to the outside of the threaded rod, and a mounting bracket fixedly connected to the outside of the moving block.

[0007] The rotary switching mechanism includes a geared motor fixedly installed on the bottom wall of the mounting base, a rotating shaft rotatably connected to the inside of the mounting base and extending to its outside, a transmission gear fixedly connected to the output shaft of the geared motor, a driven gear fixedly connected to the outside of the rotating shaft, a fixed seat fixedly connected to the top of the rotating shaft, and a placement slot opened inside the fixed seat.

[0008] Furthermore, the threaded rod is rotatably connected to the inside of the mounting box, the servo motor is electrically connected to the PLC controller, and a bearing adapted to the threaded rod is fixedly installed inside the mounting box.

[0009] Furthermore, a slider extending into the interior of the mounting box is fixedly connected to the back of the movable block, and a sliding groove adapted to the slider is provided inside the mounting box, with the slider and the sliding groove being slidably connected.

[0010] Furthermore, the industrial camera is fixedly installed inside the mounting bracket, the industrial camera is electrically connected to the PLC controller, and a light source is fixedly installed at the bottom of the industrial camera.

[0011] Furthermore, the transmission gear and the driven gear mesh with each other, the rotating shaft is a solid cylinder, and there are four placement slots, which are arranged in a ring shape inside the fixed base.

[0012] Furthermore, the fixed base is provided with a clamping mechanism, which includes a miniature cylinder fixedly installed inside the fixed base. A clamp is fixedly connected to the output end of the miniature cylinder, and the placement slot has an opening adapted to the clamp.

[0013] Furthermore, the number of clamping mechanisms is four sets, which are arranged in a ring shape inside the fixed base and extend into the interior of the four placement slots respectively.

[0014] Compared with the prior art, this utility model provides a non-contact measurement method for multi-level inner diameters of stepped deep-hole metal parts, which has the following advantages:

[0015] 1. This non-contact measurement method for multi-level inner diameters of stepped deep-hole metal parts utilizes a PLC controller to activate a servo motor that rotates a threaded rod. This causes a moving block to move an industrial camera and light source up and down via a mounting bracket. By controlling the penetration depth and angle of the light source and utilizing the reflection from the rounded corners of the metal parts, the industrial camera obtains a clear image of the deep hole boundary. This facilitates non-contact measurement of metal parts of different sizes. The data is then processed and analyzed by the control system to obtain the multi-level inner diameter dimensions of the metal parts, achieving high measurement accuracy.

[0016] 2. This non-contact measurement method for multi-stage inner diameters of stepped deep-hole metal parts utilizes a PLC controller to activate a geared motor that drives a transmission gear. This gear meshes with the driven gear, rotating shaft, and fixed base, enabling convenient rotation switching for metal parts of different sizes and improving measurement efficiency. The PLC controller also activates a micro-cylinder to extend and retract, moving the clamp to ensure effective clamping of parts of different sizes and preventing movement or rotation during measurement. This method is suitable for multi-stage inner diameter measurement of various stepped deep-hole metal parts, demonstrating its high practicality. Attached Figure Description

[0017] Figure 1 This is a three-dimensional cross-sectional view of the structure of this utility model;

[0018] Figure 2 This is a three-dimensional sectional view of the lifting mechanism of this utility model;

[0019] Figure 3 This is a three-dimensional structural view of the rotary switching mechanism of this utility model;

[0020] Figure 4 This is a three-dimensional structural view of the clamping mechanism of this utility model.

[0021] In the diagram: 1. Light-shielding box; 2. Box door; 3. PLC controller; 4. Industrial camera; 5. Mounting box; 6. Mounting base; 7. Servo motor; 8. Threaded rod; 9. Moving block; 10. Mounting bracket; 11. Gear motor; 12. Transmission gear; 13. Rotating shaft; 14. Driven gear; 15. Fixed base; 16. Placement slot; 17. Miniature cylinder; 18. Fixture. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1:

[0024] Please see Figures 1 to 4This embodiment describes a non-contact measurement method for multi-level inner diameters of stepped deep-hole metal parts, comprising a light-shielding box 1, a door 2 hinged to the outside of the light-shielding box 1, a PLC controller 3 fixedly installed outside the light-shielding box 1, an industrial camera 4 installed inside the light-shielding box 1, a mounting box 5 installed inside the light-shielding box 1, and a mounting base 6 fixedly connected to the bottom wall of the light-shielding box 1. The mounting box 5 has a lifting mechanism extending to its outside, and the mounting base 6 has a rotation switching mechanism extending to its outside. The lifting mechanism includes a servo motor 7 fixedly installed on the top of the mounting box 5, a threaded rod 8 fixedly connected to the output shaft of the servo motor 7, a moving block 9 threadedly connected to the outside of the threaded rod 8, and a mounting bracket 10 fixedly connected to the outside of the moving block 9. The PLC controller 3 starts the servo motor 7 to drive the threaded rod 8 to rotate, so that the moving block 9 drives the industrial camera 4 and the light source to move up and down through the mounting bracket 10. By controlling the penetration depth and angle of the light source, and using the reflection of the rounded corners of the metal parts, the industrial camera 4 obtains a clear image of the deep hole boundary, which is convenient for non-contact measurement of metal parts of different sizes. The system then processes and analyzes the data to obtain the multi-level inner diameter dimensions of the metal parts, achieving the advantage of high measurement accuracy.

[0025] The threaded rod 8 is rotatably connected to the inside of the mounting box 5, the servo motor 7 is electrically connected to the PLC controller 3, and the inside of the mounting box 5 is fixedly installed with a bearing that is compatible with the threaded rod 8.

[0026] Specifically, the back of the movable block 9 is fixedly connected to a slider that extends into the interior of the mounting box 5. The interior of the mounting box 5 is provided with a sliding groove that matches the slider, and the slider and the sliding groove are slidably connected.

[0027] It should be noted that the industrial camera 4 is fixedly installed inside the mounting bracket 10. The industrial camera 4 is electrically connected to the PLC controller 3, and a light source is fixedly installed at the bottom of the industrial camera 4. The light source can adopt an optical fiber and a transparent rigid tube structure to ensure that the light can be evenly irradiated onto the inner diameter surface of the metal part.

[0028] In this embodiment, the rotary switching mechanism includes a geared motor 11 fixedly mounted on the inner bottom wall of the mounting base 6, a rotating shaft 13 rotatably connected to the interior of the mounting base 6 and extending to its exterior, a transmission gear 12 fixedly connected to the output shaft of the geared motor 11, a driven gear 14 fixedly connected to the exterior of the rotating shaft 13, a fixed seat 15 fixedly connected to the top of the rotating shaft 13, and a placement slot 16 formed inside the fixed seat 15. The geared motor 11 is started by the PLC controller 3, driving the transmission gear 12 to rotate. This rotation of the transmission gear 12 meshes with the driven gear 14, the rotating shaft 13, and the fixed seat 15, enabling convenient rotary switching of metal parts of different sizes and improving measurement efficiency.

[0029] Among them, the transmission gear 12 and the driven gear 14 mesh with each other, the rotating shaft 13 is a solid cylinder, and there are four placement slots 16, which are distributed in a ring shape inside the fixed base 15.

[0030] Example 2:

[0031] Please see Figures 1 to 4 Based on Embodiment 1, a clamping mechanism is included inside the fixed base 15. The clamping mechanism includes a miniature cylinder 17 fixedly installed inside the fixed base 15. A clamp 18 is fixedly connected to the output end of the miniature cylinder 17. An opening adapted to the clamp 18 is provided inside the placement groove 16. The miniature cylinder 17 is activated by the PLC controller 3 to extend and retract, moving the clamp 18 and ensuring effective clamping of parts of different sizes. This prevents the parts from moving or rotating during measurement, making it suitable for multi-stage inner diameter measurement of various stepped deep-hole metal parts, achieving the advantage of high practicality.

[0032] The clamping mechanism consists of four sets, which are arranged in a ring shape inside the fixed base 15 and extend into the four placement slots 16 respectively.

[0033] The above technical solution facilitates effective clamping of parts of different sizes, preventing the parts from moving or rotating during measurement. It is suitable for multi-level inner diameter measurement of various stepped deep through-hole metal parts, achieving the advantage of strong practicality.

[0034] The working principle of the above embodiments is as follows:

[0035] In use, the metal part to be tested is placed in the placement slot 16 on the fixed base 15, and the micro cylinder 17 is activated by the PLC controller 3 to extend and retract, driving the clamp 18 to move, ensuring effective clamping of parts of different sizes. The penetration depth and angle of the light source are adjusted according to the size of the metal part to ensure that the light can evenly illuminate the inner diameter surface of the metal part. The servo motor 7 is activated by the PLC controller 3 to drive the threaded rod 8 to rotate, causing the moving block 9 to move the industrial camera 4 and the light source up and down via the mounting bracket 10. By controlling the penetration depth and angle of the light source, the processing of the metal part is utilized... With rounded corners and reflective surfaces, the industrial camera 4 obtains clear images of the deep hole boundaries, enabling non-contact measurement of metal parts of different sizes. The data is then processed and analyzed by the control system to obtain multi-level inner diameter dimensions of the metal parts. The PLC controller 3 starts the geared motor 11, which drives the transmission gear 12 to rotate. This rotation of the transmission gear 12 meshes with the driven gear 14, the rotating shaft 13, and the fixed base 15, causing them to rotate. As needed, the PLC controller 3 can drive the fixed base 15 to rotate to the position of the next metal part, repeating the above measurement process. This allows for convenient rotational switching of metal parts of different sizes.

[0036] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. Any method that can achieve its beneficial effect can be implemented. In addition, the electrical components in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can control the electrical components through simple programming. Moreover, the existing disclosed power connection technology is also common knowledge in the field. Therefore, the specific structural composition and working principle will not be described in detail in this embodiment.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A non-contact measurement method for multi-stage inner diameters of stepped deep-hole metal parts, characterized in that: The device includes a light shield (1), a door (2) hinged to the outside of the light shield (1), a PLC controller (3) fixedly installed on the outside of the light shield (1), an industrial camera (4) installed inside the light shield (1), a mounting box (5) installed inside the light shield (1), and a mounting base (6) fixedly connected to the bottom wall of the light shield (1). The mounting box (5) is provided with a lifting mechanism extending to the outside, and the mounting base (6) is provided with a rotation switching mechanism extending to the outside. The lifting mechanism includes a servo motor (7) fixedly installed on the top of the mounting box (5), a threaded rod (8) fixedly connected to the output shaft of the servo motor (7), a moving block (9) threadedly connected to the outside of the threaded rod (8), and a mounting bracket (10) fixedly connected to the outside of the moving block (9). The rotary switching mechanism includes a geared motor (11) fixedly installed on the inner bottom wall of the mounting base (6), a rotating shaft (13) rotatably connected to the inside of the mounting base (6) and extending to its outside, a transmission gear (12) fixedly connected to the output shaft of the geared motor (11), a driven gear (14) fixedly connected to the outside of the rotating shaft (13), a fixed seat (15) fixedly connected to the top of the rotating shaft (13), and a placement slot (16) opened inside the fixed seat (15).

2. The non-contact measurement of multi-stage inner diameter of a stepped deep-hole metal part according to claim 1, characterized in that: The threaded rod (8) is rotatably connected to the inside of the mounting box (5). The servo motor (7) is electrically connected to the PLC controller (3). The inside of the mounting box (5) is fixedly installed a bearing that is compatible with the threaded rod (8).

3. The non-contact measurement of multi-stage inner diameters of stepped deep-hole metal parts according to claim 1, characterized in that: The back of the movable block (9) is fixedly connected to a slider that extends into the interior of the mounting box (5). The interior of the mounting box (5) is provided with a sliding groove that matches the slider, and the slider and the sliding groove are slidably connected.

4. The non-contact measurement of multi-stage inner diameters of stepped deep-hole metal parts according to claim 1, characterized in that: The industrial camera (4) is fixedly installed inside the mounting bracket (10). The industrial camera (4) is electrically connected to the PLC controller (3). A light source is fixedly installed at the bottom of the industrial camera (4).

5. The non-contact measurement of multi-stage inner diameters of stepped deep-hole metal parts according to claim 1, characterized in that: The transmission gear (12) and the driven gear (14) mesh with each other. The rotating shaft (13) is a solid cylinder. There are four placement slots (16), which are arranged in a ring shape inside the fixed base (15).

6. The non-contact measurement of multi-stage inner diameters of stepped deep-hole metal parts according to claim 1, characterized in that: The fixed base (15) is provided with a clamping mechanism inside. The clamping mechanism includes a miniature cylinder (17) fixedly installed inside the fixed base (15). A clamp (18) is fixedly connected to the output end of the miniature cylinder (17). The placement slot (16) has an opening that is compatible with the clamp (18).

7. The non-contact measurement of multi-stage inner diameters of stepped deep-hole metal parts according to claim 6, characterized in that: The number of clamping mechanisms is four sets, which are arranged in a ring shape inside the fixed base (15) and extend into the interior of the four placement slots (16).

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