A CNC machining piece assembly in place testing tool
By combining a drive assembly and an L-shaped housing detection unit in the inspection of CNC machined parts, multi-dimensional synchronous inspection of workpieces is achieved, solving the problems of low efficiency and large error in traditional inspection, and realizing efficient and accurate automated judgment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN HON HAIYUAN TECH DEV CO LTD
- Filing Date
- 2025-10-13
- Publication Date
- 2026-07-24
AI Technical Summary
Traditional CNC machining assembly and inspection is inefficient, labor-intensive, and prone to subjective errors. Furthermore, existing automated equipment cannot achieve rapid and comprehensive multi-dimensional assembly deviation detection, making it difficult to meet the needs of high-precision automated production.
A mobile module driven by a first drive component and a second drive component is used, combined with multiple sets of detection units and displacement sensors in an L-shaped housing, to achieve precise positioning and movement of the workpiece in two-dimensional space, perform multi-point synchronous contact detection, and realize automated judgment by comparing the collected displacement data.
It significantly improves inspection efficiency and consistency, avoids subjective errors in manual inspection, and enables rapid, accurate, and efficient judgment of the assembly status of workpieces, overcoming the limitations of traditional inspection equipment.
Smart Images
Figure CN224552314U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of CNC inspection tool technology, specifically a CNC machined part assembly inspection tool. Background Technology
[0002] In the field of mechanical manufacturing, especially in the assembly process involving precision CNC machined parts, ensuring that parts are accurately installed in their predetermined positions is a crucial step in guaranteeing product quality and subsequent machining accuracy. Traditional assembly alignment checks often rely on manual measurement using simple measuring tools such as feeler gauges and calipers.
[0003] This method is not only inefficient and labor-intensive, but also highly susceptible to subjective judgment errors due to human factors, resulting in poor consistency of inspection results and failing to meet the dual demands of efficiency and accuracy in modern mass production. Furthermore, for workpieces with complex structures or multi-dimensional mounting requirements, traditional methods struggle to achieve rapid and comprehensive positional assessment. While some automated inspection equipment exists, its functions are relatively limited, typically only capable of single-point or unidirectional inspection. It cannot simultaneously and rapidly measure and evaluate multi-dimensional assembly deviations on adjacent vertical surfaces of the workpiece, hindering further improvements in production cycle time and becoming a technical bottleneck in high-precision automated production lines. Therefore, there is an urgent need to develop a CNC-machined part assembly positioning fixture to overcome the shortcomings of current applications and meet current requirements. Utility Model Content
[0004] The purpose of this utility model is to provide a CNC machined part assembly inspection tool to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a CNC machining part assembly inspection fixture, comprising: a CNC machine and an inspection fixture device installed inside the CNC machine, the inspection fixture device being used to detect whether the workpiece to be machined is assembled in place; The inspection device includes: Mounting rack; The first mobile module is mounted on the mounting bracket; The first drive component is mounted on the mounting bracket and is used to drive the displacement of the first moving module. Mounting base, located on the first movable module; The second mobile module is mounted on the mounting base; The second drive component is mounted on the mounting base; The detection module is mounted on the second moving module and is driven by the second drive assembly to move along the axis of the second moving module. The detection module includes: L-shaped casing; Multiple detection units are arranged in an array inside the L-shaped housing; Each detection unit includes: Mounting housing, located inside the L-shaped housing; The probe is slidably inserted through one end of the mounting housing; The top plate is fixedly mounted on the probe; A spring, positioned between the top plate and the mounting housing, is used to push the probe outwards from the L-shaped housing; The displacement sensor is housed inside the mounting housing and axially aligned with the rear end of the probe. The movable end of the probe passes through the L-shaped housing and extends to the outside.
[0006] Specifically, by setting up a first moving module driven by a first driving component and a second moving module driven by a second driving component, the detection module achieves precise positioning and movement in two-dimensional space, enabling it to efficiently and automatically reach the inspection position. The detection module adopts an L-shaped housing with multiple built-in detection units. Each detection unit integrates a probe that always extends outward under the action of a spring and a displacement sensor that monitors its retraction displacement. This structure allows the equipment to perform rapid, multi-point synchronous contact detection on two adjacent sides of the workpiece at one time. By collecting precise displacement data at each point and comparing it with a preset range, the system automatically achieves accurate, efficient, and reliable judgment on whether the workpiece is assembled in place, significantly improving detection efficiency and consistency, and avoiding subjective errors of manual inspection.
[0007] Preferably, the first moving module includes a first slide rail and a first slider that slides with the first slide rail, and the mounting base is disposed on the first slider.
[0008] Preferably, the first drive assembly includes a first motor, a transmission box, and a first lead screw; the transmission box and the first motor are mounted on a mounting bracket; one end of the first lead screw is connected to the output shaft of the transmission box, and the end of the first lead screw is rotatably mounted in the first slide rail through a bearing and a bearing seat; the first slider is provided with a first threaded pair that mates with the first lead screw.
[0009] Specifically, by adopting a driving method in which the first lead screw and the first threaded pair are driven by the first motor and transmitted through the transmission box, and in conjunction with the high-precision guiding structure formed by the first slide rail and the first slider, a stable, reliable and accurate linear displacement drive is provided for the mounting base and the overall mechanism above it. This effectively ensures the positioning accuracy and repeatability of the detection module in the first motion dimension. Its high rigidity, high transmission efficiency and stable operation provide an accurate position reference for subsequent detection work, thereby ensuring the reliability of the overall detection results.
[0010] Preferably, the second moving module includes a second slide rail and a second slider that slides with the second slide rail, and the detection module is disposed on the second slider.
[0011] Preferably, the second drive assembly includes a second motor, a second lead screw, and a second threaded pair; the detection module is fixedly connected to the second slider and also fixedly connected to the second threaded pair disposed on the second lead screw; one end of the second lead screw is driven and connected to the second motor, and the other end of the second lead screw is supported by a bearing and a bearing seat.
[0012] Specifically, the second motor drives the second lead screw to rotate, which in turn drives the second threaded pair and the fixedly connected second slider to move precisely along the second slide rail. This provides a high-precision, high-rigidity linear feed drive for the detection module in the second motion dimension. Its compact structure and smooth transmission ensure that the L-shaped housing and its multiple detection units can be accurately and reliably positioned to the preset detection position, thereby effectively guaranteeing the positioning accuracy and motion repeatability of the entire fixture when continuously detecting different sides of the workpiece.
[0013] Preferably, the extension directions of the first slide rail and the second slide rail are perpendicular to each other.
[0014] Specifically, by setting the extension directions of the first and second slide rails to be perpendicular to each other, the first and second moving modules together form a compact, motion-decoupled two-dimensional Cartesian coordinate motion system. This layout allows the detection module mounted on the second slider to move independently and precisely in two mutually perpendicular directions, thereby efficiently and flexibly covering the entire test area on the side of the workpiece, achieving automated, all-round accurate detection, and greatly improving detection efficiency and system space utilization.
[0015] Preferably, detection units are provided on two adjacent sides of the L-shaped housing, and the probes on each side extend in a direction perpendicular to the side of the L-shaped housing.
[0016] Specifically, by setting the detection units on two adjacent sides of the L-shaped housing and ensuring that the extension direction of each probe is strictly perpendicular to the side of the housing, it is ensured that when the detection module moves to the detection position, the probes on each side can simultaneously contact the corresponding side wall of the workpiece at the optimal vertical angle. This allows for multi-point synchronous detection of two adjacent vertical surfaces of the workpiece in one go, greatly improving detection efficiency. At the same time, it ensures that the contact posture of all probes is consistent, making the displacement data collected by the displacement sensor more accurate and reliable, and effectively avoiding measurement errors caused by angular deviations.
[0017] Preferably, the displacement sensor is a laser displacement sensor or a contact displacement sensor.
[0018] Specifically, by preferentially using either laser displacement sensors or contact displacement sensors, a flexible solution is provided for precision inspection under different working conditions. Laser displacement sensors enable non-contact, high-precision measurement, avoiding contact wear and offering rapid response, making them suitable for workpieces with high surface precision requirements. Contact displacement sensors, on the other hand, with their stable mechanical contact characteristics, ensure the reliability and anti-interference capabilities of measurement data even under complex working conditions. These two options give the inspection fixture a wider range of applicability and adaptability, allowing users to select the most suitable sensing method based on the specific material, surface characteristics, and precision requirements of the workpiece. This significantly improves the practicality and overall performance of the entire inspection fixture while ensuring detection accuracy. Preferably, the first motor and the second motor are servo motors or stepper motors.
[0019] It should be noted that the abstract figures and instructions are attached. Figure 1 In this context, A represents the part to be processed.
[0020] Compared with the prior art, this utility model provides a CNC machined part assembly inspection fixture, which has the following beneficial effects: The fully automatic positioning and movement of the inspection mechanism in a two-dimensional plane is achieved through two sets of precision linear motion modules arranged perpendicularly to each other, replacing the traditional manual or single-axis drive method and greatly improving the inspection efficiency and automation level. Its innovative L-shaped inspection housing structure integrates an array of elastic probes and high-precision displacement sensing units, enabling the equipment to perform synchronous, multi-point contact measurement on two adjacent vertical surfaces of the workpiece at one time. By collecting the displacement data of each measuring point in real time and comparing it with the preset tolerance, the equipment achieves a fast, accurate and consistent automated judgment of the workpiece assembly status, effectively overcoming the technical limitations of low efficiency and large subjective error of manual inspection and the inability of traditional single-point inspection equipment to fully reflect two-dimensional pose error. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the front structure of this utility model; Figure 2 This is one of the structural schematic diagrams of the inspection tool device of this utility model; Figure 3 This is the second schematic diagram of the inspection device structure of this utility model; Figure 4This is a schematic diagram of the first mobile module of this utility model in its retracted state; Figure 5 This is an exploded view of the inspection device of this utility model; Figure 6 This is a schematic diagram of the structure of the first drive component of this utility model; Figure 7 This is a schematic diagram of the detection module structure of this utility model; Figure 8 This is a top cross-sectional view of the detection module of this utility model; Figure 9 This is one of the partial cross-sectional views of the detection unit of this utility model; Figure 10 This is the second partial cross-sectional view of the detection unit of this utility model.
[0022] In the diagram: 10, CNC equipment; 20, inspection device; 210, mounting bracket; 220, first moving module; 221, first slide rail; 222, first slider; 230, first drive assembly; 231, first motor; 232, transmission box; 233, first lead screw; 234, first threaded pair; 240, mounting base; 250, second moving module; 251, second slide rail; 252, second slider; 260, second drive assembly; 261, second motor; 262, second lead screw; 263, second threaded pair; 270, detection module; 271, L-shaped housing; 272, detection unit; 2721, mounting shell; 2722, probe; 2723, top plate; 2724, spring; 2725, displacement sensor. Detailed Implementation
[0023] 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.
[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0025] Example: Please see Figures 1-10 This utility model provides a technical solution: a CNC machining part assembly inspection fixture, including: a CNC equipment 10 and an inspection device 20 installed inside the CNC equipment 10, the inspection device 20 being used to detect whether the workpiece to be machined is assembled in place; Inspection device 20 includes: Mounting bracket 210; The first movable module 220 is mounted on the mounting bracket 210; The first drive component 230 is mounted on the mounting bracket 210 and is used to drive the first moving module 220 to displacement. Mounting base 240 is mounted on the first movable module 220; The second movable module 250 is mounted on the mounting base 240; The second drive component 260 is disposed on the mounting base 240; The detection module 270 is mounted on the second moving module 250 and is driven by the second drive assembly 260 to move along the axis of the second moving module 250. The detection module 270 includes: L-shaped housing 271; Multiple sets of detection units 272 are distributed in an array inside the L-shaped housing 271; Each detection unit 272 includes: Mounting housing 2721 is located inside L-shaped housing 271; The probe 2722 is slidably inserted through one end of the mounting housing 2721; Top plate 2723 is fixedly mounted on probe 2722; Spring 2724 is disposed between top plate 2723 and mounting housing 2721 for pushing probe 2722 out of L-shaped housing 271; The displacement sensor 2725 is disposed inside the mounting housing 2721 and is axially aligned with the rear end of the probe 2722; The movable end of probe 2722 penetrates the L-shaped housing 271 and extends to the outside.
[0026] Specifically, by setting up a first moving module 220 driven by a first driving component 230 and a second moving module 250 driven by a second driving component 260, the detection module 270 is precisely positioned and moved in two-dimensional space, enabling it to efficiently and automatically reach the inspection position. The detection module 270 adopts an L-shaped housing 271 with multiple built-in detection units 272. Each detection unit 272 integrates a probe 2722 that always extends outward under the action of a spring 2724 and a displacement sensor 2725 that monitors its retraction displacement. This structure enables the device to perform rapid, multi-point synchronous contact detection on two adjacent sides of the workpiece at one time. By collecting the precise displacement data of each point and comparing it with a preset range, the device can automatically and accurately, efficiently and reliably judge whether the workpiece is assembled in place, significantly improving detection efficiency and consistency, and avoiding subjective errors of manual inspection.
[0027] Preferably, the first moving module 220 includes a first slide rail 221 and a first slider 222 that slides with the first slide rail 221, and the mounting base 240 is disposed on the first slider 222.
[0028] Preferably, the first drive assembly 230 includes a first motor 231, a transmission box 232, and a first lead screw 233; the transmission box 232 and the first motor 231 are mounted on the mounting bracket 210; one end of the first lead screw 233 is connected to the output shaft of the transmission box 232, and the end of the first lead screw 233 is rotatably mounted in the first slide rail 221 through a bearing and a bearing seat; the first slider 222 is provided with a first threaded pair 234 that cooperates with the first lead screw 233.
[0029] Specifically, by adopting a driving method in which the first lead screw 233, driven by the first motor 231 and transmitted through the transmission box 232, cooperates with the first threaded pair 234, and with the high-precision guiding structure formed by the first slide rail 221 and the first slider 222, a stable, reliable and accurate linear displacement drive is provided for the mounting base 240 and the overall mechanism above it. This effectively ensures the positioning accuracy and repeatability of the detection module 270 in the first motion dimension. Its high rigidity, high transmission efficiency and stable operation provide an accurate position reference for subsequent detection work, thereby ensuring the reliability of the overall detection results.
[0030] Preferably, the second moving module 250 includes a second slide rail 251 and a second slider 252 that slides with the second slide rail 251, and the detection module 270 is disposed on the second slider 252.
[0031] Preferably, the second drive assembly 260 includes a second motor 261, a second lead screw 262, and a second threaded pair 263; the detection module 270 is fixedly connected to the second slider 252 and also fixedly connected to the second threaded pair 263 disposed on the second lead screw 262; one end of the second lead screw 262 is drivenly connected to the second motor 261, and the other end of the second lead screw 262 is supported by a bearing and a bearing seat.
[0032] Specifically, the second motor 261 drives the second lead screw 262 to rotate, which in turn drives the second threaded pair 263 and the fixedly connected second slider 252 to move precisely along the second slide rail 251. This provides a high-precision, high-rigidity linear feed drive for the detection module 270 in the second motion dimension. Its compact structure and smooth transmission ensure that the L-shaped housing 271 and its multiple detection units 272 can be accurately and reliably positioned to the preset detection position, thereby effectively guaranteeing the positioning accuracy and motion repeatability of the entire fixture when continuously detecting different sides of the workpiece.
[0033] Preferably, the extension directions of the first slide rail 221 and the second slide rail 251 are perpendicular to each other.
[0034] Specifically, by setting the extension directions of the first slide rail 221 and the second slide rail 251 to be perpendicular to each other, the first moving module 220 and the second moving module 250 together form a compact, motion-decoupled two-dimensional Cartesian coordinate motion system. This layout allows the detection module 270 mounted on the second slider 252 to move independently and accurately in two mutually perpendicular directions, thereby efficiently and flexibly covering the entire test area on the side of the workpiece to be inspected, realizing automated, all-round accurate detection, and greatly improving detection efficiency and system space utilization.
[0035] Preferably, a detection unit 272 is provided on each of the two adjacent sides of the L-shaped housing 271, and the protrusion direction of the probe 2722 on each side is perpendicular to the side of the L-shaped housing 271.
[0036] Specifically, by setting the detection units 272 on two adjacent sides of the L-shaped housing 271 respectively, and ensuring that the extension direction of each probe 2722 is strictly perpendicular to the side of the housing, it is ensured that when the detection module 270 moves to the detection position, the probes 2722 on each side can simultaneously contact the corresponding side wall of the workpiece to be detected at the optimal vertical angle. This allows for multi-point synchronous detection of two adjacent vertical surfaces of the workpiece in one go, greatly improving detection efficiency. At the same time, it ensures that the contact posture of all probes 2722 is consistent, making the displacement data collected by the displacement sensor 2725 more accurate and reliable, and effectively avoiding measurement errors caused by angular deviations.
[0037] Preferably, the displacement sensor 2725 is a laser displacement sensor 2725 or a contact displacement sensor 2725.
[0038] Specifically, by selecting either a laser displacement sensor or a contact displacement sensor for the displacement sensor 2725, a flexible solution is provided for precision inspection under different working conditions. Laser displacement sensors enable non-contact, high-precision measurement, avoiding contact wear and offering rapid response, making them suitable for workpieces with high surface precision requirements. Contact displacement sensors, on the other hand, with their stable mechanical contact characteristics, ensure the reliability and anti-interference capabilities of measurement data even under complex working conditions. These two options give the inspection fixture a wider range of applicability and adaptability, allowing users to choose the most suitable sensing method based on the specific material, surface characteristics, and precision requirements of the workpiece. This significantly improves the practicality and overall performance of the entire inspection fixture while ensuring detection accuracy. Preferably, the first motor 231 and the second motor 261 are servo motors or stepper motors.
[0039] Working principle: When the CNC equipment 10 starts the detection program, the first motor 231 of the first drive assembly 230 drives the first lead screw 233 to rotate through the transmission box 232, which drives the first threaded pair 234 and the first slider 222 connected thereto to move along the first slide rail 221, thereby sending the entire mounting base 240 and its second moving module 250 and detection module 270 to the predetermined work position; then the second motor 261 of the second drive assembly 260 drives the second lead screw 262 to rotate, which pushes the second slider 252 and the fixed [other components] through the second threaded pair 263. The detection module 270 moves precisely along the second slide rail 251, bringing the two vertical sides of the L-shaped housing 271 close to the workpiece to be inspected. At the moment of contact, the surface of the workpiece will press the corresponding probe 2722 against the elastic force of the spring 2724 and move backward. This displacement is captured in real time by the displacement sensor 2725 and converted into an electrical signal and transmitted to the control system. The system automatically determines whether the assembly position of the workpiece in the two-dimensional space is completely and accurately in place by comparing the measured displacement value of each detection point with the preset qualified range, thereby achieving efficient and automated accurate detection.
[0040] 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 the element.
Claims
1. A CNC machined part assembly inspection fixture, characterized in that, include: The CNC equipment (10) and the inspection device (20) installed inside the CNC equipment (10), the inspection device (20) being used to detect whether the workpiece to be processed is assembled in place; The inspection device (20) includes: Mounting bracket (210); The first mobile module (220) is mounted on the mounting bracket (210); The first drive assembly (230) is disposed on the mounting bracket (210) and is used to drive the first moving module (220) to displacement; The mounting base (240) is disposed on the first movable module (220); The second mobile module (250) is disposed on the mounting base (240); The second drive assembly (260) is disposed on the mounting base (240); The detection module (270) is disposed on the second moving module (250) and is driven by the second driving component (260) to move along the axis of the second moving module (250); The detection module (270) includes: L-shaped shell (271); Multiple detection units (272) are arranged in an array inside the L-shaped housing (271); Each group of detection units (272) includes: Mounting housing (2721) is disposed inside the L-shaped housing (271); The probe (2722) is slidably inserted through one end of the mounting housing (2721); The top plate (2723) is fixedly mounted on the probe (2722); A spring (2724) is disposed between the top plate (2723) and the mounting housing (2721) for pushing the probe (2722) outward from the L-shaped housing (271); A displacement sensor (2725) is disposed inside the mounting housing (2721) and axially aligned with the rear end of the probe (2722); The movable end of the probe (2722) penetrates the L-shaped housing (271) and extends to the outside.
2. The CNC machined part assembly inspection fixture according to claim 1, characterized in that: The first moving module (220) includes a first slide rail (221) and a first slider (222) that slides with the first slide rail (221), and the mounting base (240) is disposed on the first slider (222).
3. The CNC machined part assembly inspection fixture according to claim 2, characterized in that: The first drive assembly (230) includes a first motor (231), a transmission box (232), and a first lead screw (233); the transmission box (232) and the first motor (231) are mounted on the mounting bracket (210); one end of the first lead screw (233) is connected to the output shaft of the transmission box (232), and the end of the first lead screw (233) is rotatably mounted in the first slide rail (221) through a bearing and a bearing seat; the first slider (222) is provided with a first threaded pair (234) that cooperates with the first lead screw (233).
4. The CNC machined part assembly inspection fixture according to claim 3, characterized in that: The second moving module (250) includes a second slide rail (251) and a second slider (252) that slides with the second slide rail (251), and the detection module (270) is disposed on the second slider (252).
5. A CNC machined part assembly inspection fixture according to claim 4, characterized in that: The second drive assembly (260) includes a second motor (261), a second lead screw (262), and a second threaded pair (263); the detection module (270) is fixedly connected to the second slider (252) and also fixedly connected to the second threaded pair (263) provided on the second lead screw (262); one end of the second lead screw (262) is driven by the second motor (261), and the other end of the second lead screw (262) is supported by a bearing and a bearing seat.
6. A CNC machined part assembly inspection fixture according to claim 4, characterized in that: The extension directions of the first slide rail (221) and the second slide rail (251) are perpendicular to each other.
7. A CNC machined part assembly inspection fixture according to claim 1, characterized in that: The detection unit (272) is provided on two adjacent sides of the L-shaped housing (271), and the probe (2722) on each side extends perpendicularly to the side of the L-shaped housing (271).
8. A CNC machined part assembly inspection fixture according to claim 1, characterized in that: The displacement sensor (2725) is a laser displacement sensor (2725) or a contact displacement sensor (2725).
9. A CNC machined part assembly inspection fixture according to claim 5, characterized in that: The first motor (231) and the second motor (261) are servo motors or stepper motors.