CN220472567U

CN220472567U - Hole array flat plate part plane characteristic dimension detection system

Info

Publication number: CN220472567U
Application number: CN202322352721.6U
Authority: CN
Inventors: 杨志军; 唐标; 廖辉; 王沛森; 史本岩
Original assignee: Foshan Huadao Chaojing Technology Co ltd
Current assignee: Foshan Huadao Chaojing Technology Co ltd
Priority date: 2023-08-30
Filing date: 2023-08-30
Publication date: 2024-02-09
Anticipated expiration: 2033-08-30

Abstract

The utility model relates to the technical field of part detection, in particular to a hole array flat plate part plane characteristic dimension detection system. The technical proposal comprises a bottom plate for supporting equipment; the device comprises a feeding mechanism, a width detection mechanism and an image detection mechanism, wherein the feeding mechanism, the width detection mechanism and the image detection mechanism are arranged on a bottom plate and used for forming a planar characteristic size detection system of a hole array flat plate part, a part to be detected is arranged on the feeding mechanism, and a plurality of through holes which are linearly arranged are formed in the part to be detected. The utility model can obtain the position information of all holes at one time by designing the structures of the feeding mechanism, the width detection mechanism, the image detection mechanism and the like and measuring at the same time without repeatedly moving a measuring instrument, thereby greatly shortening the measuring time. For parts requiring a large number of holes in mass production, concentricity information of all holes can be obtained quickly by measuring at the same time, so that the method is beneficial to timely adjusting production parameters, optimizing process flows and improving production efficiency and product quality.

Description

Hole array flat plate part plane characteristic dimension detection system

Technical Field

The utility model relates to the technical field of part detection, in particular to a hole array flat plate part plane characteristic dimension detection system.

Background

The linear motor to-be-measured parts and the like are subjected to equal-hole array to-be-measured parts, whether the to-be-measured parts meet the machining requirements or not is required to be measured in batch manufacturing, and the to-be-measured parts mainly comprise length, width, aperture and hole spacing dimensions, and the error requirement is below 0.05 mm. The prior method mainly adopts a caliper to measure the length and width, uses a go-no-go gauge to measure the size and the spacing of the holes, has low efficiency and takes a great deal of manpower.

Image detection has the characteristics of non-contact and high speed, but the accuracy is usually only on the silk level. The prior art CN202310317234.8 combines an image and a mechanical manner to improve measurement accuracy. However, when the holes on both sides are not concentric, simultaneous measurement is not achieved and efficiency is lowered. The width measurement realized by the adjustable tightening of the two sides can only measure the maximum size in the width direction, and the condition that the width changes along with the length direction can not be reflected to judge the processing quality of the part. In addition, during the detection process, when the mechanical part is worn, measurement errors are caused. The image measurement and the mechanical measurement are necessary to check each other. Therefore, the distance between the edge dimension and the center of the hole requires acquisition of an image of the edge of the part for detection, and the edge of the part in the prior art is contacted by the width adjustment mechanism, so that the edge characteristic cannot be obtained. The prior art does not give illumination conditions of backlight and coaxial light combination, and cannot realize high-precision detection of the inner and outer apertures of the counter bore.

Disclosure of Invention

Aiming at the problems in the background technology, the utility model provides a theme that the prior linear motor magnetic plate equal-hole array magnetic plate part in the hole array flat plate part plane characteristic dimension detection system mainly adopts a caliper to measure the length and width dimensions, and a go-no-go gauge is used for measuring the dimension and the distance of a hole, so that the efficiency is low and a great deal of manpower is spent.

The technical scheme of the utility model is as follows: the hole array flat part plane characteristic dimension detection system comprises a bottom plate for supporting equipment;

the device comprises a feeding mechanism, a width detection mechanism and an image detection mechanism, wherein the feeding mechanism, the width detection mechanism and the image detection mechanism are arranged on a bottom plate and used for forming a planar characteristic size detection system of a hole array flat-plate part, a part to be detected is arranged on the feeding mechanism, and a plurality of through holes which are linearly arranged are formed in the part to be detected;

the feeding mechanism is used for driving the part to be measured to move, one side of the feeding mechanism is provided with a check mechanism and a displacement detection element, the other end of the feeding mechanism is provided with a part in-place detection sensor, the check mechanism and the part in-place detection sensor are used for measuring the length of the part to be measured, the width detection mechanism is used for measuring the width of the part to be measured, the image detection mechanism is used for detecting the aperture of the through hole, the center coordinates of the hole and the distance from the center of the hole to the edge of the part to be measured, and then the sum of the edge distance and the hole distance of the part to be measured is checked with the measurement result of the displacement detection element to obtain the detection result of the plane characteristic dimension.

Optionally, the feeding mechanism comprises a linear module, a displacement detection unit, an auxiliary transmission and a supporting mechanism, and the linear module comprises a linear motor for driving the load to move on the linear track.

Optionally, the width detection mechanism comprises a guide rail, a pinch roller for propping against two sides of the part to be detected and a displacement detection unit for detecting displacement or position change of the part to be detected.

Optionally, the image detection mechanism includes a backlight source, a coaxial light source and an industrial camera, and the backlight source, the coaxial light source and the industrial camera are located on an axis from bottom to top.

Optionally, be provided with the backup pad that is used for supporting the part that awaits measuring on linear electric motor's the platform, the one end of backup pad is provided with the check mechanism that is used for restricting the part that awaits measuring to one end gliding.

Optionally, a reading head corresponding to the displacement detecting element is arranged at the bottom of the supporting plate.

Compared with the prior art, the utility model has the following beneficial technical effects:

1. the utility model can obtain the position information of all holes at one time by designing the structures of the feeding mechanism, the width detection mechanism, the image detection mechanism and the like and measuring at the same time without repeatedly moving a measuring instrument, thereby greatly shortening the measuring time. For parts requiring a large number of holes in mass production, concentricity information of all holes can be obtained quickly by measuring at the same time, so that the method is beneficial to timely adjusting production parameters, optimizing process flows and improving production efficiency and product quality;

2. by measuring the width of the two sides of the part, whether the width is uniform and symmetrical in the processing process and whether deformation or deviation in the vertical or horizontal direction exists can be effectively detected. For example, in the manufacture of a body sheet metal part, the inconsistency of the widths of both sides may indicate the presence of processing problems such as internal stress, pressure unevenness, and the like. If the unqualified processing quality exists, corrective measures can be immediately taken, so that further loss and delay are avoided;

3. the edge characteristics can be directly perceived by directly contacting the edge, so that the feedback signal can be obtained in real time, and the width adjusting mechanism can be timely adjusted to ensure the processing quality. This real-time feedback facilitates quick adjustment and correction, improves production efficiency and reduces detection errors.

4. Because the backlight source and the coaxial light source are adopted for composite illumination, the high-precision detection of the inner hole and the outer hole of the screw hole with the counter bore can be realized, and the measurement requirement of the porcelain plate of the linear motor is met.

Drawings

FIG. 1 is a schematic diagram of a system for detecting the planar feature size of a flat panel component with an array of holes according to the present utility model;

FIG. 2 is a schematic view of a portion of the structure of FIG. 1;

fig. 3 is a schematic view of a partially disassembled structure of fig. 1.

Reference numerals: 1. a bottom plate; 2. a linear motor; 3. a displacement detecting element; 4. a reading head; 5. a non-return mechanism; 6. a pinch roller; 7. a backlight; 8. a coaxial light source; 9. an industrial camera; 10. a support plate; 11. a part to be measured; 12. a through hole; 13. part in-place detection sensor.

Detailed Description

The technical scheme of the utility model is further described below with reference to the attached drawings and specific embodiments.

Examples

As shown in fig. 1-3, the hole array flat panel part plane characteristic dimension detection system provided by the utility model comprises a bottom plate 1 for supporting equipment; the device comprises a feeding mechanism, a width detection mechanism and an image detection mechanism, wherein the feeding mechanism, the width detection mechanism and the image detection mechanism are arranged on a base plate 1 and used for forming a hole array flat plate part plane characteristic dimension detection system, a part to be detected 11 is arranged on the feeding mechanism, and the part to be detected 11 is a device for fixing and clamping an object to be detected. It is usually made of a material having magnetism that can attract and hold the object to be detected in a desired position. A plurality of through holes 12 which are linearly arranged are formed in the part to be tested 11; the feeding mechanism is used for driving the part 11 to be tested to move, one side of the feeding mechanism is provided with the displacement detection element 3 and the check mechanism 5, the other end of the feeding mechanism is provided with the part in-place detection sensor 13, and the distance between the check mechanism 5 and the part in-place detection sensor 13 is the length of the part to be tested. The in-place part detection sensor 13 is a non-contact sensor such as a Hall sensor and an eddy current sensor, or a contact member such as a positioning pin, and the position relationship of the part to be detected is controlled in a contact or non-contact mode so as to detect the length of the part to be detected. The width detection mechanism is used for measuring the width of the part 11 to be measured, the image detection mechanism is used for detecting the aperture of the through hole 12, the hole center coordinates and the distance from the hole center to the edge of the part 11 to be measured, and then checking the sum of the edge distance and the hole distance of the part 11 to be measured and the grating measurement result.

Further, the feeding mechanism comprises a linear module, a displacement detection unit, an auxiliary transmission and a supporting mechanism, and the linear module comprises a linear motor 2 for driving a load to move on a linear rail. The linear motor 2 is an electromagnetic device that converts electric energy into linear power. Unlike conventional rotating electrical machines, which convert electrical energy into rotational mechanical power, linear electrical machines convert electrical energy into linear mechanical motion.

Furthermore, the width detection mechanism comprises a guide rail, a pinch roller 6 for propping against two sides of the part 11 to be detected and a displacement detection unit for detecting the displacement or the position change of the part 11 to be detected, a support plate 10 for supporting the part 11 to be detected is arranged on a platform of the linear motor 2, a check mechanism 5 for limiting the part 11 to be detected to slide towards one end is arranged at one end of the support plate 10, and a reading head 4 corresponding to the displacement detection element 3 is arranged at the bottom of the support plate 10. Pinch roller 6 is a device for maintaining contact between the inspected object and the inspection platform. It is typically located at the bottom of the image detection system and ensures that the object being detected remains stably in the desired position during image acquisition by applying appropriate pressure.

The check mechanism 5 is a mechanical device for controlling or restricting the movement direction, and is also called a non-return device, a fall-preventing device, a reverse-preventing device, or the like. It is generally designed to prevent reverse movement or reverse behavior of the mechanical component or system in some cases.

The displacement detecting element 3 is a measuring scale with uniformly distributed grating lines, and is usually a grating structure engraved on a light transparent substrate. The displacement detecting element 3 may have different dimensions and accuracies, selected according to the application requirements. When an object moves, the grating structure on the displacement detecting element 3 generates optical interference, forming a specific optical signal. The working principle of the displacement detecting element 3 mainly relies on optical measurement techniques to determine displacement or position information by analyzing the optical signal.

Wherein the reading head 4 is a device for reading an optical signal on the displacement detecting element 3, comprising a light source and a light sensitive element. The light source irradiates the grating structure on the displacement detecting element 3, and the light signal formed after interference is received by the photosensitive element. The reading head 4 converts the received optical signal into an electrical signal and further processes and parses to obtain specific values of displacement or position.

When the part is detected, the part 11 to be detected is conveyed to the platform of the linear motor 2 through the check mechanism 5, when the part 11 to be detected completely passes through, the check mechanism 5 is reset, the linear motor 2 is started, the platform of the linear motor pushes the part 11 to be detected to advance through the check mechanism 5, when the part in-place detection sensor 13 is triggered, the width detection mechanism is started to measure the length and the width of the part 11 to be detected, and the image detection is started to detect the end line position of the part 11 to be detected. And calling the pre-stored size parameters of the corresponding specification parts according to the length and width dimensions, enabling the control platform to enter a hole position of the next through hole 12 for detection, obtaining a clear picture under the irradiation of a backlight source and a coaxial light source, calculating to obtain the inner and outer aperture of the through hole 12, the center displacement of the hole and the distance between the through hole 12 and the side line, and simultaneously calculating the distance between the through holes 12 by utilizing the center positions of the front through hole 12 and the rear through hole 12 and the actual moving distance read by a grating ruler. The above process is repeated, thereby realizing the full-automatic detection of the plane characteristic dimension.

In this embodiment, the image detection mechanism of the planar feature size detection system includes a backlight 7, a coaxial light source 8 and an industrial camera 9, where the backlight 7, the coaxial light source 8 and the industrial camera 9 are located on an axis from bottom to top. The backlight 7 is a special backlight for use in image detection and visual detection applications. It is designed to provide specific lighting conditions to better display features, defects or other areas of interest of the inspected object. The coaxial light source 8 is a light source arrangement for illuminating and viewing a work area requiring special illumination conditions. In the coaxial light source 8, the illumination light and the observation light travel in the same axial direction, so that the light can be directly perpendicularly irradiated onto the object to be observed and returned to the eyes of the observer through the same passage. The industrial camera 9 is a camera specifically designed for industrial image detection and machine vision applications. They have high performance, high precision and reliability, and are suitable for various industrial environments and application requirements. And the lens thereon is an optical element for collecting and focusing light to form an image. It is commonly used in cameras, video cameras, scanners, etc. for capturing images or video of objects.

In this embodiment, mechanical measurement and image detection are adopted to correct each other, so that accuracy is ensured. The mechanical measurement adopts a feeding mechanism to push a part 11 to be measured to move, the part 11 to be measured completely passes through a check mechanism 5, then the feeding mechanism stops moving, a linear platform feeding mechanism is started, the part 11 to be measured is pushed to move forwards through a bayonet of the check mechanism 5 until the front of the part 11 to be measured contacts a measuring width and part in-place detection sensor 13, a displacement detection element 3 is started to measure an instruction, the length and width dimensions of the part 11 to be measured are obtained, and hole site dimension parameters of corresponding specifications are called for displacement control and comparison.

And starting the image detection unit to identify the aperture and the center coordinates of the hole and the distance from the center of the hole to the edge of the part 11 to be detected. The empty space, which is measured with the displacement detecting element 3, is checked for the width dimension, and the reliability of the measured data is ensured. The part adopts a middle support, the edge of the image detection area is non-contact, and clear outline is convenient to obtain. The width adopts the pinch roller 6 to contact, and the grating measurement mode obtains the width dimension information in different positions in real time. The two sides are not in power auxiliary transmission, and the detection of parts with larger width is supported.

The middle feeding system pushes the part 11 to be measured to the middle and transmits the part to the platform of the pressing measuring system. And the check mechanism of the measuring platform is used for conveying the part 11 to be measured, the part 11 to be measured firstly presses the check mechanism and is sent to the detecting platform through the unpowered auxiliary supporting mechanism, after the part is conveyed, the check mechanism is reset, the feeding system is signaled to stop conveying, and meanwhile, the detecting system is started to feed.

The front end of the belt reaches a set detection point, sends an instruction to the grating to measure the length and width of the part 11 to be measured, and informs the image system to start acquisition. According to the length and width of the part 11 to be measured, a through hole 12-bit movement instruction on the part 11 to be measured is called, an image is acquired by using an image detector every time the part is positioned near the next vacancy, the hole and the side line are identified, the aperture is measured, the distance between the center coordinates of the hole and the side line is measured, and then the sum of the side line distance and the hole distance is checked with a grating measurement result, so that high-precision and high-reliability measurement is realized.

After the test is finished, the linear motor 2 is started to transmit the part 11 to be tested to the material receiving station through the supporting plate 10, and the part is moved to the material feeding station, is detected and reset, and waits for the next detection of feeding.

The above-described embodiments are merely alternative embodiments of the present utility model, and many alternative modifications and combinations of the above-described embodiments can be made by those skilled in the art based on the technical solutions of the present utility model and the related teachings of the above-described embodiments.

Claims

1. The flat feature size detection system of the hole array flat plate part is characterized by comprising:

a base plate (1) for supporting the apparatus;

the device comprises a feeding mechanism, a width detection mechanism and an image detection mechanism, wherein the feeding mechanism, the width detection mechanism and the image detection mechanism are arranged on a bottom plate (1) and used for forming a hole array flat plate part plane characteristic dimension detection system, a part to be detected (11) is arranged on the feeding mechanism, and a plurality of through holes (12) which are linearly arranged are formed in the part to be detected (11);

the feeding mechanism is used for driving a part (11) to be detected to move, one side of the feeding mechanism is provided with a check mechanism (5) and a displacement detection element (3), the other end of the feeding mechanism is provided with a part in-place detection sensor (13), the check mechanism (5) and the part in-place detection sensor (13) are used for measuring the length of the part to be detected, the width detection mechanism is used for measuring the width of the part (11) to be detected, the image detection mechanism is used for detecting the aperture of a through hole (12), the center coordinates of the hole and the distance from the center of the hole to the edge of the part (11) to be detected, and then the sum of the distance from the edge of the part (11) to be detected and the distance between the holes is checked with the measurement result of the displacement detection element (3), so that the plane characteristic dimension detection result is obtained.

2. The hole array flat part plane characteristic dimension detection system according to claim 1, wherein the feeding mechanism comprises a linear module, a displacement detection unit, an auxiliary transmission and supporting mechanism, and the linear module comprises a linear motor (2) for driving a load to move on a linear rail.

3. The hole array flat part plane characteristic dimension detection system according to claim 1, wherein the width detection mechanism comprises a guide rail, a pinch roller (6) used for propping against two sides of the part (11) to be detected and a displacement detection unit used for detecting displacement or position change of the part (11) to be detected.

4. The hole array flat part planar feature size detection system according to claim 1, wherein the image detection mechanism comprises a backlight (7), a coaxial light source (8) and an industrial camera (9), and the backlight (7), the coaxial light source (8) and the industrial camera (9) are positioned on one axis from bottom to top.

5. The hole array flat part plane characteristic dimension detection system according to claim 2, wherein a supporting plate (10) for supporting the part to be detected (11) is arranged on a platform of the linear motor (2), and a check mechanism (5) for limiting the part to be detected (11) to slide towards one end is arranged at one end of the supporting plate (10).

6. The hole array flat part planar feature size detection system according to claim 5, wherein a reading head (4) corresponding to the displacement detection element (3) is provided at the bottom of the support plate (10).