Automobile bumper profile detection device and detection method

Abstract

The application discloses a kind of automobile bumper profile detection device and detection method, it is characterized by: device includes the detection positioning base of interval arrangement, detection positioning base between being equipped with detection reference point scale, mobile detection component is equipped on the detection reference point scale, the mobile detection component includes X direction scale and Z direction scale, the X direction scale and Z direction scale can be adjusted along X direction and Z direction respectively, the detection arm is rotatably connected on the mobile detection component.The automobile bumper profile detection device and detection method of the application, simple structure, convenient operation, low cost, can quickly realize bumper and hood cooperation place flanging profile, with strong practicality and good application prospect.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts testing technology, and more specifically, relates to an automotive bumper contour testing device and testing method. Background Technology

[0002] In the automotive manufacturing process, the appearance quality of the fit between the bumper and the hood is one of the important evaluation indicators of user-perceived quality. This mating area has high requirements for the contour of the flange. If there is a large deviation in the contour of the flange, it will directly lead to the gap and step difference between the hood and the bumper being unqualified, affecting the overall appearance of the vehicle and wind noise performance.

[0003] Currently, the industry mainly uses two methods to inspect the contour of bumper flanges. One method is inspection using dedicated fixtures, which requires developing a dedicated fixture for each vehicle model. This is costly, time-consuming, and the fixtures are bulky, making them unsuitable for rapid inspection on the production line. The second method is inspection using a coordinate measuring machine (CMM). This method offers high precision but is slow, requires a constant temperature environment, and is complex to operate, making it unsuitable for the cycle time requirements of mass production.

[0004] Both of the above methods are time-consuming and labor-intensive, and cannot achieve rapid on-site judgment. Especially in the trial production stage of new models or the sampling inspection stage of the production site, there is a lack of a convenient, low-cost and quantifiable rapid contour detection tool. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the prior art and provide a vehicle bumper contour detection device and detection method that is simple in structure, easy to operate, low in cost, and can quickly realize on-site measurement and deviation judgment of the flange contour at the joint between the bumper and the hood.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: the provided automobile bumper contour detection device is characterized by: including detection positioning bases arranged at intervals, detection reference point scales provided between the detection positioning bases, a movable detection component provided on the detection reference point scales, the movable detection component including an X-axis scale and a Z-axis scale, the X-axis scale and the Z-axis scales being adjustable along the X and Z directions respectively, and the detection arm being rotatably connected to the movable detection component.

[0007] To make the above technical solutions more detailed and specific, the present invention also provides the following further preferred technical solutions to achieve satisfactory practical effects:

[0008] The moving detection component is movably mounted on the detection reference point scale via a first sliding sleeve, which can be adjusted along the detection reference point scale. The Z-axis scale is vertically arranged on the first sliding sleeve, and a second sliding sleeve is provided on the Z-axis scale, which can be adjusted up and down along the Z-axis scale. A third sliding sleeve is fixedly connected to one side of the second sliding sleeve, and the X-axis scale is located inside the third sliding sleeve and can move forward and backward along the X-axis along the third sliding sleeve.

[0009] The detection arm is rotatably connected to the X-axis scale, and a detection arm engraving disc is provided at the hinge point between the detection arm and the X-axis scale.

[0010] The detection arm is connected to the X-axis scale via a rotating shaft and is equipped with a locking mechanism.

[0011] The detection arm has a contour detection block at its detection end, and the bottom surface of the contour detection block has a groove structure that matches the rounded corner of the bumper flange.

[0012] The bottom surface of the detection and positioning base is provided with a contoured surface that matches the shape of the corresponding mating area of ​​the bumper.

[0013] The detection and positioning base is equipped with a positioning pin that positions it to the bumper.

[0014] The detection and positioning base is provided with support rods, and the detection reference point scale is connected between the support rods; the detection reference point scale is provided with multiple reference detection points.

[0015] The detection positioning base is detachably mounted on the support rod; the detection reference point scale is an adjustable telescopic structure.

[0016] A method for detecting the contour of an automotive bumper includes the following steps:

[0017] Step 1: Calibration; Secure the measuring device to the standard bumper flange standard block using the positioning base and positioning pins; Read and record the X-axis scale readings at each reference point on the benchmark scale. Z-axis scale reading ; Reading of the graduated dial on the detection arm The above three sets of data for each benchmark point are used as standard calibration values ​​and are saved or marked.

[0018] Step Two: Measurement; Remove the measuring device from the standard block and fix it to the same mating area of ​​the bumper to be tested using the same installation and positioning method; at each reference point with the same number, fix any two values ​​according to the standard calibration values ​​of the corresponding reference points saved and recorded in Step One, adjust the remaining value, and record the value when the test block corresponds to the reference point on the test edge; record the readings of the test arm's engraving disc respectively. Z-axis scale reading Reading of the X-axis scale ;

[0019] Step 3: Deviation Calculation and Judgment; For each reference point, calculate the deviation in each direction, and then determine the deviation of each reference point. , , If all deviations of all reference points are within the tolerance range, the bumper flange contour is deemed acceptable. If any deviation of any reference point exceeds the tolerance range, it is deemed unacceptable, and the specific location of the deviation can be located based on the deviation value and direction.

[0020] Compared with the prior art, the present invention has the following advantages: the automobile bumper contour detection device and detection method of the present invention has a simple structure, is easy to operate, and has low cost. It can quickly realize the contour of the flange at the joint between the bumper and the hood, and has strong practicality and good application prospects. Attached Figure Description

[0021] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein:

[0022] Figure 1 This is a schematic diagram of the structure of the automobile bumper contour detection device of the present invention;

[0023] Figure 2 This is a schematic diagram of the movement detection component structure in this invention;

[0024] Figure 3 This is a schematic diagram of the structure of the automobile bumper contour detection device of the present invention.

[0025] Figure 4 This is a schematic diagram of the positioning structure of the positioning base and positioning pin in this invention;

[0026] Figure 5 This is a schematic diagram of the detection reference point scale structure in this invention;

[0027] Figure 6 This is a schematic diagram of the movement detection component structure in this invention;

[0028] Figure 7 This is a schematic diagram of the detection arm structure in this invention.

[0029] The markings in the diagram are: 1. Detection positioning base; 11. Positioning pin; 2. Support rod; 3. Detection reference point scale; 4. X-axis scale; 5. Z-axis scale; 6. Detection arm; 7. Detection arm engraving plate; 8. Detection edge. Detailed Implementation

[0030] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and through the description of the examples.

[0031] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "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 invention 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 limiting this invention.

[0032] The present invention relates to a car bumper contour measuring device, such as... Figure 1 , 2 As shown, a car bumper contour detection device is characterized by: it includes detection positioning bases arranged at intervals, with detection reference point scales provided between the detection positioning bases. A movable detection component is provided on the detection reference point scales, the movable detection component including an X-axis scale and a Z-axis scale, the X-axis scale and Z-axis scale being adjustable along the X and Z directions respectively, and a detection arm rotatably connected to the movable detection component. This car bumper contour detection device has a simple structure, is easy to operate, and is low in cost, enabling rapid measurement of the contour of the flange at the joint between the bumper and the hood.

[0033] The system includes two spaced-apart detection and positioning bases 1. Each base 1 has a support rod 2. The bottom surface of the base has a contoured surface that matches the corresponding mating area of ​​the bumper, used to conform to the bumper surface for initial positioning. A positioning pin 11 is provided on the lower end face of the base 1 and is inserted into pre-set process holes or positioning holes at both ends of the bumper for secondary positioning, ensuring the tool's spatial position relative to the bumper remains consistent during each measurement. A detection reference point scale 3 is connected between the two support rods 2. This scale is arranged along the extension direction of the bumper flange and marks multiple reference detection points (preferably 5 to 7) to calibrate the specific points for each measurement.

[0034] In this invention, a movable detection component is provided on the detection reference point scale 3. The movable detection component includes an X-axis scale 4 and a Z-axis scale 5, which are adjustable in the X and Z directions, respectively. The detection arm 6 is rotatably connected to the movable detection component. The movable detection component is movably mounted on the detection reference point scale 3 via a first sliding sleeve, which can be adjusted along the detection reference point scale 3. A vertically arranged Z-axis scale 5 is connected to the first sliding sleeve, and a second sliding sleeve is provided on the Z-axis scale 5, which can be adjusted up and down along the Z-axis scale 5. A third sliding sleeve is fixedly connected to one side of the second sliding sleeve, and the X-axis scale 4 is located inside the third sliding sleeve and can move back and forth along the X direction along the third sliding sleeve. The X-axis scale 4 and the Z-axis scale 5 are used to read the displacement deviation values ​​in the horizontal X direction and the vertical Z direction, wherein the scales can be mechanical vernier scales. The detection arm 6 is rotatably connected to the X-axis scale 4, and a detection arm engraving disk 7 is provided at the hinge point between the detection arm 6 and the X-axis scale 4.

[0035] In this invention, one end of the detection arm 6 is connected to the X-axis scale 4, and the other end is equipped with a contour detection block. The bottom surface of the contour detection block has a groove structure that matches the rounded corner of the bumper flange, for contacting the flange surface during measurement. The contour detection block is hinged to the end of the detection arm, allowing for a small range of motion to avoid positioning jamming and facilitate measurement operation. The detection arm can rotate around the hinge axis with the X-axis scale 4 to adapt to different detection points, and is equipped with a locking mechanism to fix the detection arm at the measurement position. The locking mechanism can be a fastening screw assembly or other conventional locking mechanisms that can restrict the rotation of the detection arm and the rotating shaft.

[0036] In this invention, the detection arm engraving disk 7 is fixedly installed at the connection shaft between the detection arm 6 and the X-axis scale 4, and is used to read the rotation angle of the detection arm relative to the vertical position, reflecting the angular torsional deviation at the flange fillet.

[0037] In this invention, the detection reference point scale 3 can be configured as a telescopic adjustment structure. By adjusting and controlling the length of the detection reference point scale 3, the distance between the two detection positioning bases 1 can be controlled. The reference point on the scale is selected according to actual needs. This structure can meet the contour detection needs of bumpers for more car models and has better applicability.

[0038] The installation and positioning steps of the measuring device are as follows: Attach the contoured surface of the detection positioning base 1 to the corresponding mating area surface of the bumper to be tested; insert the positioning pin into the corresponding preset positioning hole on the bumper to complete the quick positioning; move the moving detection component to the corresponding detection reference point to be tested, adjust the X-axis scale 4 and Z-axis scale 5 to the standard calibration value and lock them in place, rotate the detection arm to the target detection point position, and fix the detection arm by the locking mechanism.

[0039] This invention provides a detection method using the measuring device, comprising the following steps:

[0040] Step 1: Calibration

[0041] The measuring device is fixedly installed on the standard bumper flange standard block using a positioning base and positioning pin; at each reference point on the reference point scale 3 (e.g., reference point 1 to reference point 7), the following three sets of data are read and recorded respectively: the reading of the X-axis scale 4. Reading of scale 5 in the Z direction ; Reading of the graduated disc 7 on the detection arm The above three sets of data for each benchmark point are used as standard calibration values ​​and saved or marked.

[0042] Step Two: Measurement

[0043] Remove the measuring device from the standard block and fix it to the same mating area of ​​the bumper to be tested using the same installation and positioning method. At each reference point with the same number, fix any two values ​​according to the standard calibration values ​​of the corresponding reference points recorded in step one, adjust the remaining value, and record the value when the test block corresponds to the reference point on the test edge. For example, adjust the X-axis scale 4 to the position of the corresponding reference point. Adjust the Z-axis scale 5 to the corresponding reference point position. Adjust the detection arm until the detection block aligns with the reference point on the detection edge, then record the reading on the detection arm's graduated dial 7. ;

[0044] Adjust the X-axis scale 4 to the corresponding reference point position. The detection arm is adjusted to the corresponding reference point position. Adjust the Z-axis scale 5 until the detection block aligns with the reference point on the detection edge, then record the reading of the Z-axis scale 5. ;

[0045] Adjust the Z-axis scale 5 to the corresponding reference point position. The detection arm is adjusted to the corresponding reference point position. Adjust the X-axis scale 4 until the detection block aligns with the reference point on the detection edge, then record the reading of the X-axis scale 5. .

[0046] Step 3: Deviation Calculation and Judgment

[0047] For each reference point, calculate the deviation in each direction:

[0048]

[0049]

[0050]

[0051] Each benchmark point , , Compare with the preset tolerance range.

[0052] If all deviations of all reference points are within the tolerance range, the bumper flange profile is deemed to be qualified.

[0053] If any deviation of any reference point exceeds the tolerance range, it is deemed unqualified, and the specific location of the deviation can be located based on the deviation value and direction. If the test block does not correspond to the reference point on the test edge, it is also deemed unqualified.

[0054] Compared with existing technologies, this invention offers the following advantages: Single-person operation and single-point measurement take only seconds, enabling rapid sampling inspection on the production line, significantly reducing the time cost of traditional coordinate measuring machines (CMMs) or gauge measurements, resulting in high inspection efficiency; no need for specialized large gauges, low tooling manufacturing costs, and applicability to different vehicle models, requiring only replacement of the positioning base contour surface or inspection block; deviation visualization: by analyzing the deviation readings in the X, Z, and angle dimensions, the specific deviation direction and magnitude of the flange in space can be intuitively determined, facilitating on-site adjustment of molds or tooling; no need for professional CMM operators, ordinary quality inspectors can use it after simple training, resulting in a low operating threshold. After one calibration, batch rapid inspection of parts in the same batch can be performed, suitable for quality monitoring in mass production stages.

[0055] like Figure 1 As shown, the car bumper contour measuring device of this embodiment has a detection and positioning base 1 made of aluminum alloy. The bottom surface is machined with a contoured curved surface that matches the shape of the mating area at the upper left corner of the front bumper of a certain car model. Two positioning pins are correspondingly provided on the detection and positioning bases on both sides, one of which is a cylindrical pin and the other is a diamond-shaped pin, corresponding to two existing positioning holes on the bumper.

[0056] The benchmark scale 3 is fixed on the support rod 2, and there are 7 benchmark detection points distributed along the bumper flange direction, which are marked as follows: to The X-axis scale 4 and Z-axis scale 5 are digital vernier calipers with a measuring range of ±10mm and a resolution of 0.01mm.

[0057] The detection arm 6 is mounted on one side of the base via a pivot. Its front end features a contoured detection block made of polyoxymethylene (POM) material, shaped to match the rounded corner of the bumper flange to prevent scratching the component surface. A locking knob is located at the pivot of the detection arm to fix the angle of the arm during measurement. The detection arm's graduation plate 7 is a circular dial fixed to the pivot, with a graduation accuracy of 0.5°, used in conjunction with a pointer to read the angle value.

[0058] This invention provides an embodiment of a detection method, taking the detection of the flange contour at the mating point between the front bumper and the hood of a certain vehicle model as an example. The specific operation is as follows:

[0059] Step 1: Calibration Operation

[0060] Install this tool onto the standard bumper flange standard block (a reference part calibrated by a three-coordinate measuring machine) of this vehicle model using the positioning base and positioning pin, ensuring good fit of the contour surface and full insertion of the positioning pin. Record the measurements at points P1 to P7 respectively. , , Value. For example, in Point record: =5.00mm, =3.00mm, =15.0°.

[0061] Step Two: Measurement Operation

[0062] Move the tool to the same position on the bumper to be tested, and after completing the positioning and installation, fix any two values, adjust the remaining value, and record the value when the test block corresponds to the reference point on the test edge. Click to read, =5.35mm, =2.80mm, =16.0°.

[0063] Step 3: Deviation Judgment

[0064] calculate Point deviation: =+0.35mm, =−0.20mm, =+1.0°.

[0065] If the specified tolerances for this vehicle model are X-axis ≤ ±0.5mm, Z-axis ≤ ±0.5mm, and angle ≤ ±1.5°, then this point is acceptable. Complete the following steps sequentially. to Calculation and determination of all points.

[0066] If all points are within tolerance, the bumper flange contour is deemed acceptable; if any point exceeds tolerance (e.g., ...), the bumper is deemed acceptable. point If the value is +0.7mm, it can be determined that the flange is protruding outwards, and feedback on mold adjustment is required.

[0067] The preset tolerance range can be adjusted as needed, depending on the vehicle model or appearance grade requirements. For example, for luxury vehicles, it can be tightened to ≤±0.3mm in the X / Z direction and ≤±0.8° in the angle; for commercial vehicles or non-appearance surfaces, it can be relaxed to ±1.0mm. All tolerance judgment rules are set after the initial calibration and remain unchanged during measurement.

[0068] The contour accuracy referred to in this invention mainly refers to comparison with standard parts. By measuring, the shape deviation between the test part and the standard part can be known, facilitating simple and rapid quality inspection. In mass production sampling inspection, only one calibration and recording of the standard value are required. Subsequent parts in the same batch do not need to be calibrated again; they can be directly measured and compared, significantly improving inspection efficiency. Complete measurement of all 7 points of a single part can be completed within 5 minutes.

[0069] This invention relates to a device and method for detecting the contour of automotive bumpers. It features a simple structure, convenient operation, and low cost, enabling rapid measurement of the flange contour at the joint between the bumper and hood. It possesses strong practicality and promising application prospects. Suitable for on-site dimensional inspection in welding, painting, final assembly, and quality assurance departments of automotive manufacturing plants, it can also be used for outgoing inspection by parts suppliers. The operation is simple and quick, allowing for rapid batch testing of parts from the same production line with high efficiency.

[0070] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0071] The present invention has been described above by way of example with reference to the accompanying drawings. However, the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention or any direct application to other situations shall fall within the protection scope of the present invention.

Claims

1. A device for detecting the contour of an automobile bumper, characterized in that: The device includes spaced-apart detection and positioning bases, with detection reference point scales between the bases. A movable detection component is mounted on the detection reference point scales, which includes an X-axis scale and a Z-axis scale. The X-axis scale and Z-axis scale are adjustable along the X and Z axes, respectively. The detection arm is rotatably connected to the movable detection component.

2. The automobile bumper contour detection device according to claim 1, characterized in that: The moving detection component is movably mounted on the detection reference point scale via a first sliding sleeve, which can be adjusted along the detection reference point scale. The Z-axis scale is vertically arranged on the first sliding sleeve, and a second sliding sleeve is provided on the Z-axis scale, which can be adjusted up and down along the Z-axis scale. A third sliding sleeve is fixedly connected to one side of the second sliding sleeve, and the X-axis scale is located inside the third sliding sleeve and can move forward and backward along the X-axis along the third sliding sleeve.

3. The automobile bumper contour detection device according to claim 2, characterized in that: The detection arm is rotatably connected to the X-axis scale, and a detection arm engraving disc is provided at the hinge point between the detection arm and the X-axis scale.

4. The automobile bumper contour detection device according to claim 3, characterized in that: The detection arm is connected to the X-axis scale via a rotating shaft and is equipped with a locking mechanism.

5. The automobile bumper contour detection device according to claim 1, characterized in that: The detection arm has a contour detection block at its detection end, and the bottom surface of the contour detection block has a groove structure that matches the rounded corner of the bumper flange.

6. The automobile bumper contour detection device according to claim 1, characterized in that: The bottom surface of the detection and positioning base is provided with a contoured surface that matches the shape of the corresponding mating area of ​​the bumper.

7. The automobile bumper contour detection device according to claim 1, characterized in that: The detection and positioning base is equipped with a positioning pin that positions it to the bumper.

8. The automobile bumper contour detection device according to claim 1, characterized in that: The detection and positioning base is provided with support rods, and the detection reference point scale is connected between the support rods; the detection reference point scale is provided with multiple reference detection points.

9. The automobile bumper contour detection device according to claim 8, characterized in that: The detection positioning base is detachably mounted on the support rod; the detection reference point scale is an adjustable telescopic structure.

10. A method for detecting the contour of an automobile bumper as described in any one of claims 1 to 9, comprising the following steps: Step 1: Calibration; Secure the measuring device to the standard bumper flange standard block using the positioning base and positioning pins; Read and record the X-axis scale readings at each reference point on the benchmark scale. Z-axis scale reading ; Readings of the graduated dial on the detection arm The above three sets of data for each benchmark point are used as standard calibration values ​​and are saved or marked. Step Two: Measurement; Remove the measuring device from the standard block and fix it to the same mating area of ​​the bumper to be tested using the same installation and positioning method; at each reference point with the same number, fix any two values ​​according to the standard calibration values ​​of the corresponding reference points saved and recorded in Step One, adjust the remaining value, and record the value when the test block corresponds to the reference point on the test edge; record the readings of the test arm's engraving disc respectively. Z-axis scale reading Reading of the X-axis scale ; Step 3: Deviation Calculation and Judgment; For each reference point, calculate the deviation in each direction, and then determine the deviation of each reference point. , , If all deviations of all reference points are within the tolerance range, the bumper flange contour is deemed acceptable. If any deviation of any reference point exceeds the tolerance range, it is deemed unacceptable, and the specific location of the deviation can be located based on the deviation value and direction.

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