Product flatness detection mechanism

Abstract

The utility model belongs to the technical field of product detection, and particularly relates to a product flatness detection mechanism, which comprises a positioning fixture and a lifting mechanism, a product is placed on a positioning reference surface of the positioning fixture, the positioning fixture is used for limiting and fixing the product, and the lifting mechanism is fixedly mounted at the bottom of the positioning fixture. And the lifting mechanism is used for driving the detection sensor to measure the product. According to the utility model, through an automatic detection process, the Keyence GT2 displacement sensor, the THK high-precision linear guide rail and other components are combined for cooperative work, so that a traditional manual dial indicator measurement mode is replaced, the detection efficiency and the detection precision are remarkably improved, the consistency deviation caused by manual operation is reduced, the equipment cost is greatly reduced, and the production efficiency is improved. And the high-efficiency detection requirement of batch production can be met.

Description

Technical Field

[0001] This utility model belongs to the field of product testing technology, specifically, it relates to a product flatness testing mechanism. Background Technology

[0002] Currently, product flatness inspection mainly relies on manual dial indicator measurement or laser scanners, which has the following significant drawbacks:

[0003] I. Manual inspection is inefficient and inconsistent. When using a dial indicator to inspect flatness, it is necessary to measure each point manually, which is time-consuming and affected by subjective factors such as the operator's technique and force. This results in poor consistency of the test results and makes it difficult to meet the requirements of high efficiency and accuracy for mass production.

[0004] Second, high-precision laser equipment is expensive. When using high-precision equipment such as laser scanners for flatness detection, the equipment purchase cost is high and the subsequent maintenance cost is also high. This places a heavy economic burden on small and medium-sized enterprises, which limits the widespread application of this technology.

[0005] Third, the traditional three-point testing method has limitations. The traditional three-point testing method can only evaluate flatness through data from three fixed points, which cannot fully reflect the overall deformation characteristics of the product's surface and is prone to missing local deformation areas, resulting in incomplete and inaccurate test results.

[0006] Fourth, the equipment has poor compatibility. Existing testing equipment lacks adaptive adjustment capabilities. For workpieces of different sizes and shapes, it is necessary to frequently change or adjust the testing fixtures, which is cumbersome and has poor compatibility, making it difficult to meet the testing needs of diverse products.

[0007] Therefore, there is an urgent need for a product flatness testing mechanism that is efficient, low-cost, highly compatible, and can comprehensively reflect the characteristics of planar deformation, in order to solve the above-mentioned problems existing in the prior art. Utility Model Content

[0008] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a product flatness testing mechanism.

[0009] According to the present invention, a product flatness detection mechanism includes a positioning fixture and a lifting mechanism. The product is placed on the positioning reference surface of the positioning fixture, and the positioning fixture is used to limit and fix the product. The lifting mechanism is fixedly installed at the bottom of the positioning fixture, and the lifting mechanism is used to drive the detection sensor to measure the product.

[0010] The positioning fixture includes a clamping cylinder, a tooling positioning pin sleeve assembly, a positioning block, a leveling sensor, and an in-position sensor. Several clamping cylinders are fixedly installed along the edge of the positioning reference surface of the positioning fixture. A pressure head is fixedly installed on the output end of the clamping cylinder near the product side, with the pressure head facing the surface of the product to be tested.

[0011] The lifting mechanism includes a sensor, a limit post, a buffer, a linear guide rail, and a lifting cylinder. The lifting cylinder is an Airtac cylinder, which drives the lifting mechanism to move up and down along the linear guide rail.

[0012] In a preferred embodiment: the leveling sensor is fixedly installed on one side of the positioning reference surface of the positioning fixture, the detection direction of the leveling sensor is perpendicular to the bottom surface of the product, and the in-position sensor is installed along the edge of the positioning reference surface of the positioning fixture, with the detection direction of the in-position sensor facing the product placement area.

[0013] In a preferred embodiment: a tooling positioning pin sleeve assembly is fixedly installed diagonally on the positioning reference surface of the positioning fixture, the positioning pin is inserted into the pin sleeve, the positioning pin and the pin sleeve are clearance fit, and the tooling positioning pin sleeve assembly is fitted with the positioning hole of the lifting mechanism.

[0014] In a preferred embodiment: a positioning block is fixedly installed on the positioning reference surface of the positioning fixture, and the positioning block is arranged along the product contour direction.

[0015] In a preferred embodiment: a plurality of waist-shaped holes are provided on the base plate of the lifting mechanism, and the sensor is mounted on the base plate of the lifting mechanism through the waist-shaped holes.

[0016] In a preferred embodiment: the base plate of the lifting mechanism is fixedly installed at the output end of the lifting cylinder, and the lifting cylinder is fixed by an external bracket.

[0017] In a preferred embodiment: a plurality of linear guide rails are fixedly installed on the side of the base plate of the lifting mechanism, the slider of the linear guide rail is fixedly connected to the base plate of the lifting mechanism, and the guide rail of the linear guide rail is fixedly connected to the lower plate of the positioning fixture. The linear guide rails can be THK high-precision linear guide rails.

[0018] In a preferred embodiment: the sensor is a Keyence GT2 displacement sensor, which is used to detect the flatness of the product, with a resolution of 0.1 μm and a repeatability of 1 μm.

[0019] In a preferred embodiment: limit posts are fixedly installed at the four corners of the base plate of the lifting mechanism to limit the upward stroke of the base plate of the lifting mechanism.

[0020] In a preferred embodiment: each of the limiting posts is provided with a corresponding buffer at intervals, and the buffer is arranged parallel to the limiting post.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. This utility model utilizes an automated testing process, employing a combination of Keyence GT2 displacement sensor and THK high-precision linear guide rails to work collaboratively, replacing the traditional manual dial indicator measurement method. This significantly improves testing efficiency and accuracy, reduces consistency deviations caused by manual operation, and substantially lowers equipment costs, thus meeting the high-efficiency testing needs of mass production.

[0023] 2. This utility model breaks through the limitations of the traditional three-point detection method. Through the multi-point layout of sensors and the adjustable mounting structure of waist-shaped holes, it can adapt to the detection needs of workpieces of different sizes and shapes, significantly improving the compatibility and adaptability of the detection mechanism. It can fully cover the key detection areas of the product plane, accurately capture the plane deformation characteristics, reduce the frequency of tooling changes, and solve the problem of incomplete detection results in the prior art, thereby reducing production conversion costs. Attached Figure Description

[0024] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the positioning fixture of this utility model;

[0027] Figure 3 This is a schematic diagram of the lifting mechanism of this utility model;

[0028] In the picture:

[0029] Detailed Implementation

[0030] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0031] like Figure 1-3As shown, this utility model discloses a product flatness detection mechanism, including a positioning fixture 1 and a lifting mechanism 2. A product 3 is placed on the positioning reference surface of the positioning fixture 1. The positioning fixture 1 is used to limit and fix the product 3. The lifting mechanism 2 is fixedly installed at the bottom of the positioning fixture 1. The lifting mechanism 2 is used to drive the detection sensor to measure the product 3.

[0032] The positioning fixture 1 includes clamping cylinders 11, a tooling positioning pin sleeve assembly 12, a positioning stop 13, a leveling sensor 14, and a position sensor 15. Several clamping cylinders 11 are fixedly installed along the edge of the positioning reference surface of the positioning fixture 1. A pressure head is fixedly installed on the output end of the clamping cylinder 11 near the product 3, facing the surface of the product 3 to be inspected, ensuring that the clamping direction is perpendicular to the plane of the product 3. Through the extension and retraction of the clamping cylinders 11, the product 3 is clamped and fixed on the positioning reference surface of the positioning fixture 1, ensuring that the product 3 fits snugly and preventing displacement during inspection. A tooling positioning pin sleeve assembly 12 is fixedly installed diagonally on the positioning reference surface of the positioning fixture 1. The positioning pin is inserted into the pin sleeve, and the positioning pin and pin sleeve are clearance-fitted to ensure that the positioning pin can be flexibly inserted and removed while ensuring positioning accuracy. The tooling positioning pin assembly 12 cooperates with the positioning hole of the lifting mechanism 2. The positioning stop 13 is fixedly installed on the positioning reference surface of the positioning fixture 1. The positioning stop 13 is arranged along the contour direction of the product 3 to form a limiting boundary. The leveling sensor 14 is fixedly installed on one side of the positioning reference surface of the positioning fixture 1. The detection direction of the leveling sensor 14 is perpendicular to the bottom surface of the product 3. The leveling sensor 14 is used to determine whether the product 3 is placed horizontally to avoid deviation of detection data due to tilt. The position sensor 15 is installed on the edge of the positioning reference surface of the positioning fixture 1. The detection direction of the position sensor 15 is towards the product 3 placement area. The position sensor 15 is used to determine whether the product 3 has been placed in the positioning fixture 1 and to send a signal to the system to indicate whether the product 3 is in place, triggering subsequent clamping and detection actions.

[0033] The lifting mechanism 2 includes a sensor 21, a limit post 22, a buffer 23, a linear guide rail 24, and a lifting cylinder 25. The base plate of the lifting mechanism 2 is fixedly installed on the output end of the lifting cylinder 25, which is fixed by an external bracket. The lifting cylinder 25 is an Airtac cylinder, which drives the lifting mechanism 2 to move up and down along the linear guide rail 24. Several linear guide rails 24 are fixedly installed on the side of the base plate of the lifting mechanism 2. The sliders of the linear guide rails 24 are fixedly connected to the base plate of the lifting mechanism 2. The guide rails of the linear guide rails 24 are fixedly connected to the lower plate of the positioning fixture 1. The linear guide rails 24 can be THK high-precision linear guide rails, so that the lifting cylinder 25, guided by the linear guide rails 24, drives the multiple sensors 21 on the base plate of the lifting mechanism 2 to move up and down, ensuring smooth movement. To ensure stability and positioning accuracy, the base plate of the lifting mechanism 2 has several oblong holes. The sensor 21 is installed on the base plate of the lifting mechanism 2 through the oblong holes, which facilitates the adjustment of the lateral position of the sensor 21 to meet the detection requirements of different products 3. The sensor 21 is a Keyence GT2 displacement sensor, which is used to detect the flatness of the product 3 with a resolution of 0.1μm and a repeatability of 1μm. Limiting posts 22 are fixedly installed at the four corners of the base plate of the lifting mechanism 2 to limit the upward stroke of the base plate of the lifting mechanism 2 and prevent the sensor 21 from excessively contacting the product 3 and causing damage. Each limiting post 22 is provided with a corresponding buffer 23 at intervals. The buffer 23 is arranged parallel to the limiting post 22 to reduce the impact of the sensor 21 contacting the product 3 when the lifting mechanism 2 rises, ensuring a smooth detection process.

[0034] Working principle

[0035] In operation, the product 3 is manually placed on the positioning reference surface of the positioning fixture 1. After confirming that the product 3 is in place and level by the position sensor 15 and the leveling sensor 14, the clamping cylinder 11 fixes the product 3. Then, the lifting cylinder 25 is activated, and under the guidance of the linear guide rail 24, multiple sensors 21 on the base plate of the lifting mechanism 2 are raised. They smoothly contact the product 3 through the buffer 23 and the limiting post 22, collect multi-point flatness data, and transmit it to the system for analysis and judgment of whether it is qualified. After the test is completed, the sensors 21 are reset with the lifting mechanism 2, the clamping cylinder 11 is released, and the product is unloaded manually. The whole process realizes automated testing, which is efficient, accurate and compatible with different products 3.

[0036] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A product flatness detection mechanism, characterized by, The product (3) is placed on the positioning reference surface of the positioning fixture (1). The positioning fixture (1) is used to limit and fix the product (3). The lifting mechanism (2) is fixedly installed at the bottom of the positioning fixture (1). The lifting mechanism (2) is used to drive the detection sensor to measure the product (3). The positioning fixture (1) includes a clamping cylinder (11), a tooling positioning pin assembly (12), a positioning block (13), a leveling sensor (14), and an in-situ sensor (15). Several clamping cylinders (11) are fixedly installed along the edge of the positioning reference surface of the positioning fixture (1). A pressure head is fixedly installed on the output end of the clamping cylinder (11) near the product (3), and the pressure head faces the surface of the product (3) to be tested. The lifting mechanism (2) includes a sensor (21), a limit post (22), a buffer (23), a linear guide rail (24), and a lifting cylinder (25). The lifting cylinder (25) is an Airtac cylinder, which drives the lifting mechanism (2) to move up and down along the linear guide rail (24).

2. The flatness detecting mechanism of a product according to claim 1, wherein The leveling sensor (14) is fixedly installed on one side of the positioning reference surface of the positioning fixture (1). The detection direction of the leveling sensor (14) is perpendicular to the bottom surface of the product (3). The in-place sensor (15) is installed along the edge of the positioning reference surface of the positioning fixture (1). The detection direction of the in-place sensor (15) is towards the product (3) placement area.

3. The product flatness detection mechanism of claim 1, wherein The positioning fixture (1) has a tooling positioning pin sleeve assembly (12) fixedly installed diagonally on the positioning reference surface. The positioning pin is inserted into the pin sleeve, and the positioning pin and the pin sleeve are in clearance fit. The tooling positioning pin sleeve assembly (12) is in fit with the positioning hole of the lifting mechanism (2).

4. The product flatness detection mechanism of claim 1, wherein Positioning blocks (13) are fixedly installed on the positioning reference surface of the positioning fixture (1), and the positioning blocks (13) are arranged along the contour direction of the product (3).

5. The product flatness detection mechanism of claim 1, wherein The base plate of the lifting mechanism (2) has several waist-shaped holes, and the sensor (21) is installed on the base plate of the lifting mechanism (2) through the waist-shaped holes.

6. The product flatness detection mechanism of claim 1, wherein The base plate of the lifting mechanism (2) is fixedly installed at the output end of the lifting cylinder (25), and the lifting cylinder (25) is fixed by an external bracket.

7. The product flatness detection mechanism of claim 1, wherein The lifting mechanism (2) has several linear guide rails (24) fixedly installed on the side of the base plate. The slider of the linear guide rail (24) is fixedly connected to the base plate of the lifting mechanism (2). The guide rail of the linear guide rail (24) is fixedly connected to the lower plate of the positioning fixture (1). The linear guide rail (24) can be a THK high-precision linear guide rail.

8. The product flatness detection mechanism of claim 1, wherein The sensor (21) is a Keyence GT2 displacement sensor. The sensor (21) is used to detect the flatness of the product (3), with a resolution of 0.1 μm and a repeatability of 1 μm.

9. The product flatness detection mechanism of claim 1, wherein Limiting posts (22) are fixedly installed at the four corners of the base plate of the lifting mechanism (2) to limit the upward stroke of the base plate of the lifting mechanism (2).

10. The product flatness detection mechanism of claim 9, wherein Each of the limiting posts (22) is provided with a corresponding buffer (23) at intervals, and the buffer (23) is arranged parallel to the limiting post (22).

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