A device and method for detecting riveting gap

Abstract

The present invention discloses a device for detecting riveted gaps and a detection method thereof, comprising a support plate for placing a workpiece to be detected, a plurality of probes and an insulating rubber plate driven to move up and down, wherein the probes are connected to a first energized cable and arranged on the insulating rubber plate, wherein the probes are used to approach or move away from the riveted copper nails on the workpiece to be detected, and the support plate is connected to a second energized cable to energize the riveted copper nails on the workpiece to be detected. The device and the detection method thereof have the main function of quickly and quantitatively detecting riveted gaps.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile safety detection, and in particular relates to a device for detecting riveting gaps and a detection method thereof. Background Art

[0002] In the automobile production process, automobile airbags are installed on the steering wheel by riveting. Generally, copper nails are used to rivet the automobile airbag system. Since the airtightness of automobile airbags is relatively high and the gas impact force in the automobile airbag system is relatively large, if the airtightness is relatively poor, the automobile airbag system may be accidentally deployed, resulting in serious accidents. In the copper nail riveting process, the riveting operation is affected by the riveting process, steps, and the straightness of the holes of the riveted parts, etc., which can easily cause riveting failure. In the riveting process, gaps are generated, and even the rivets cannot be fully inserted and directly rise above the plane. Since some gaps caused by riveting have a vital impact on the performance of the product, it is a very important step to detect the gaps generated during the riveting process during the production process. At present, the operator uses a multimeter to detect the gaps. Although such detection can detect the riveted gaps to a certain extent, it takes a long time to detect, which brings a lot of workload to the operator. For mass production of automobile safety bags, the workload is even greater. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a device for detecting riveted gaps. The device for detecting riveted gaps has the main functional advantages of rapid batch and quantitative detection of riveted gaps.

[0004] Another object of the present invention is to provide a method for detecting a device for detecting riveting gaps.

[0005] The present invention is achieved through the following technical solutions:

[0006] A device for detecting riveting gaps, comprising a support plate for placing a piece to be detected, a plurality of probes, and an insulating rubber plate driven to move up and down;

[0007] The probe is connected to a first energized cable and is disposed on the insulating rubber plate, and the probe is used to approach or move away from the riveted copper nail on the part to be detected;

[0008] The support plate is connected to a second power cable to energize the copper nails riveted on the part to be inspected.

[0009] In the above technical solution, the probe includes a detection end, a fixed end and a sleeve for placing the detection end and the fixed end. The detection end and the fixed end are respectively arranged at two ends of the sleeve at intervals, and the detection end is arranged on the inner wall of the sleeve so that it is subjected to force and moves along the inner wall of the sleeve to contact the fixed end.

[0010] In the above technical solution, a proximity sensor and an electromagnet are provided on one side of the support plate close to the part to be detected, the proximity sensor is used to detect the distance between the part to be detected and the support plate, and the electromagnet is used to adsorb the part to be detected onto the support plate.

[0011] In the above technical solution, a base plate is arranged below the support plate for positioning the support plate, a plurality of support columns are arranged on the base plate at intervals, grooves matching the support columns are arranged on the periphery of the support plate, and the support columns extend along the support plate through the grooves to the part to be detected for positioning the part to be detected.

[0012] In the above technical scheme, the device for detecting the riveting gap also includes a driving mechanism, which includes a cylinder, a linear guide installed on the support plate, a lower limit block arranged below the linear guide, an upper limit block arranged above the linear guide, and a slider for moving the insulating rubber plate along the linear guide. The cylinder body of the cylinder is vertically installed on the base plate, the top end of the telescopic rod of the cylinder is connected to the slider through the support rod, the top end of the support rod is connected to the telescopic rod, and the bottom end thereof is connected to the slider, wherein the top end of the support rod is arranged corresponding to the upper limit block, and the upper limit block and the lower limit block are used to limit the moving position of the insulating rubber plate.

[0013] In the above technical solution, the support rod is a "Z" shaped structure, the bottom end of the support rod is installed on the side of the slider to drive the slider to move, and the top end is connected to the top end of the telescopic rod and is arranged corresponding to the upper limit block.

[0014] In the above technical solution, a plurality of linear rails matching the probes are arranged on the lower bottom surface of the insulating rubber plate, and the fixed end of the probe is positioned on the linear rail by a positioning block for adjusting the position of the probe forward and backward, and the positioning block is limited within the linear rail.

[0015] In the above technical solution, the device for detecting the riveted gap also includes a controller, a power supply and an alarm, and the controller is respectively connected to the power supply, the alarm, the proximity sensor and the electromagnet, wherein the power supply, the second power cable, the controller, the alarm, the first power cable and the probe form a loop for detecting the riveted gap.

[0016] In the above technical solution, the insulating rubber plate is made of insulating bakelite.

[0017] In the above technical solution, the support plate is provided with a through hole for connecting with the second power cable.

[0018] A detection method for a device for detecting a riveting gap comprises the following steps:

[0019] 1) moving the insulating rubber plate to a designated position, energizing the second powered cable and the first powered cable, and determining whether the second powered cable is connected to the first powered cable;

[0020] 2) When the second power cable is connected to the first power cable, the alarm sounds, that is, there is a gap at the riveted joint of the detected part; when the second power cable is disconnected from the first power cable, there is no gap at the riveted joint of the detected part.

[0021] The advantages and beneficial effects of the present invention are:

[0022] The device for detecting riveted gaps of the present invention adopts a support plate and a probe for use in combination, and can conveniently detect gaps formed by riveted copper nails on a workpiece to be detected. The device can detect gaps quickly and accurately, is suitable for batch detection of workpieces to be detected, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a schematic structural diagram of a device for detecting riveting gaps.

[0024] Figure 2 The present invention is a front view of a device for detecting riveting gaps.

[0025] Figure 3 It is a schematic diagram of a device for detecting riveting gaps of the present invention.

[0026] Figure 4 It is an exploded view of a device for detecting riveting gaps of the present invention.

[0027] Figure 5 The present invention is a schematic diagram of the structure of a probe of a device for detecting riveting gaps.

[0028] in:

[0029] 11: Support plate, 12: Bottom plate, 2: Probe, 21: Detection end, 22: Fixed end, 23: Sleeve, 3: Driving mechanism, 31: Linear guide, 32: Insulating rubber sheet, 33: Lower limit block, 34: Upper limit block, 35: Support column, 36: Slider, 37: Cylinder, 38: Electromagnet, 39: Proximity sensor, 4: Support rod, 5: Linear track, A: Part to be detected.

[0030] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0031] In order to make those skilled in the art better understand the present invention, Figure 1-4 And specific embodiments further illustrate the technical solution of the present invention.

[0032] Example 1

[0033] A device for detecting riveting gaps, comprising a support plate 11 on which a piece to be detected is placed, a plurality of probes 2, and an insulating rubber plate 32 driven to move up and down;

[0034] The probe 2 is connected to a first energized cable and is disposed on the insulating rubber plate 32. The probe 2 is used to approach or move away from the riveted copper nails on the part to be detected.

[0035] The support plate 11 is connected to a second power cable to energize the copper nails riveted on the inspected piece.

[0036] A device for detecting riveted gaps of the present invention uses a support plate 11 and a probe 2 in combination, which can conveniently detect gaps formed by riveted copper nails on a workpiece to be detected. The device can quickly and accurately detect gaps, is suitable for batch detection of workpieces to be detected, and is easy to use.

[0037] Preferably, the insulating rubber plate 32 is made of insulating bakelite, which can play an insulating role, thereby ensuring the safety of the probe 2 during the power-on process and ensuring that the multiple probes 2 are insulated from each other.

[0038] Example 2

[0039] Based on Example 1, the probe 2 includes a detection end 21, a fixed end 22, and a sleeve 23 for placing the detection end 21 and the fixed end 22. The detection end 21 and the fixed end 22 are respectively set at the two ends of the sleeve 23 with a gap. The detection end 21 is movably installed on the inner wall of the sleeve 23 so that it is supported by the copper nail and moves along the inner wall of the sleeve 23 to contact the fixed end 22. When there is a gap at the riveted position on the part to be detected, the top of the copper nail at the riveted position will be higher than the plane height. When the detection end 21 is set at a specified position, the detection end 21 touches the top of the copper nail, and the detection end 2 1 moves along the inner wall of the sleeve 23 and contacts the fixed end 22, so that the first power cable is connected with the second power cable to form a closed loop to determine whether there is a gap at the riveted position on the to-be-detected part. When there is no gap at the riveted position, the detection end 21 is located at a specified position, the detection end 21 does not touch the top of the copper nail, the position of the detection end 21 does not change and is still gap-connected with the fixed end 22, the first power cable and the second power cable are open circuits, it is determined that there is no gap at the riveted copper nail position on the to-be-detected part, and the to-be-detected part is determined to be qualified, wherein the probe 2 can be a probe of model NPM100-A1.

[0040] Among them, a through hole for connecting the second power cable is provided on the support plate 11, wherein the second power cable is connected to the support plate 11. Since the support plate and the part to be detected are both metal and conductive, the copper nail can be charged. When the detection end 21 is placed on the copper nail, when the copper nail has a gap due to riveting, the copper nail touches and supports the detection end 21, and the detection end 21 moves along the sleeve 23 and contacts the fixed end 22. After the detection end 21 contacts the fixed end 22, the first power cable and the second power cable are connected from being disconnected.

[0041] In order to adjust the position of the probe 2 relative to the riveted gap on the part to be detected, a plurality of linear rails 5 matching the probe 2 one by one are arranged on the lower bottom surface of the insulating rubber plate 32. The fixed end 22 of the probe 2 is positioned on the linear guide rail 31 through a positioning block for adjusting the position of the probe 2 forward and backward, and the positioning block is limited in the linear rail 5, wherein the positioning block can be moved along the linear rail 5 to adjust the position of the probe 2 to meet the position of the copper nail on the part to be detected, and convex strips are arranged on the inner walls on both sides of the linear rail, and the positioning block is provided with a positioning groove matching the convex strip, and the positioning block is positioned on the convex strip through the positioning groove and can move along the convex strip.

[0042] Example 3

[0043] Based on Example 2, in order to position the part to be detected on the support plate 11, a proximity sensor 39 and an electromagnet 38 are arranged on one side surface of the support plate 11 close to the part to be detected. The proximity sensor 39 is used to detect the distance between the part to be detected and the support plate 11, and can detect whether the part to be detected is in complete contact with the support plate 11. The electromagnet 38 is used to adsorb the part to be detected on the support plate 11. When the proximity sensor 39 detects that the part to be detected is placed on the support plate 11, the electromagnet 38 is energized to generate magnetism for adsorbing the part to be detected on the support plate 11, ensuring that the part to be detected is positioned on the support plate 11, avoiding gaps between the part to be detected and the support plate 11, and misjudgment of the detection result. The proximity sensor 39 can adopt a proximity sensor with model number Omron M5 proximity sensor E2E-_X1C1.

[0044] In order to position the support plate 11, a base plate 12 is arranged below the support plate 11 for positioning the support plate 11, and a plurality of support columns 35 are arranged at intervals on the base plate 1212. Grooves matching the support columns 35 are arranged around the periphery of the support plate 11. The support columns 35 extend through the grooves along the support plate 11 to the part to be detected for positioning the part to be detected, wherein a limiting groove for positioning the support column 35 is arranged on the lower bottom surface of the part to be detected.

[0045] Example 4

[0046] Based on Example 3, in order to drive the insulating rubber plate 32 to move up and down, the device for detecting the riveting gap also includes a driving mechanism. The driving mechanism 3 drives the insulating rubber plate 32 to move up and down. Preferably, the driving mechanism 3 includes a cylinder 37, a linear guide 31 installed on the support plate 11, a lower limit block 33 arranged below the linear guide 31, an upper limit block 34 arranged above the linear guide 31, and a slider 36 for moving the insulating rubber plate 32 along the linear guide 31. The cylinder body of the cylinder 37 is vertically installed on the base plate 12, and the top end of the telescopic rod of the cylinder 37 is connected to the slider 36 through the support rod 25. The top end of the support rod 25 is connected to the telescopic rod, and its bottom end is connected to the slider 36, wherein the top end of the support rod 25 is arranged corresponding to the upper limit block 34, and the upper limit block 34 and the lower limit block 33 are used to limit the moving position of the insulating rubber plate 32.

[0047] The support rod 4 is a "Z"-shaped structure. The bottom end of the support rod 4 is installed on the side of the slider 36 to drive the slider 36 to move. The top end is connected to the top of the telescopic rod and is arranged corresponding to the upper limit block 34. When the top of the telescopic rod touches the upper limit block 34, the cylinder 37 stops working and the electromagnet 38 stops energizing. The inspected part that has been inspected is removed from the support plate 11, and the next inspected part is placed on the support plate 11. The electromagnet 38 is energized, and the cylinder 37 starts working. The telescopic rod drives the support rod 4 to move downward to drive the insulating rubber plate 32 to move downward, and moves the probe 2 on the insulating rubber plate 32 to the specified position. The lower limit block 33 touches the slider 36, and the cylinder 37 stops working to determine whether the first energized cable and the second energized cable are connected or disconnected to determine the gap condition on the inspected part.

[0048] Example 5

[0049] Based on Example 4, the device for detecting riveted gaps also includes a controller, a power supply and an alarm, wherein the controller is respectively connected to the power supply, the proximity sensor 39, the alarm and the electromagnet 38, wherein the power supply, the second power cable, the controller, the alarm, the first power cable and the probe 2 form a loop for detecting riveted gaps, and the power supply can be used for power supply, wherein the power supply powers the device.

[0050] The specific implementation is as follows: when the detection end 21 of the probe 2 detects the riveted copper nail, when there is a gap, the copper nail holds the detection end 21, the detection end 21 moves along the sleeve 23 and contacts the fixed end 22, the detection end 21 and the fixed end 22 form a loop, that is, the first power cable is connected to the second power cable, and the connection information is transmitted to the controller, the controller transmits the information to the alarm, the alarm is activated and alarms; when there is no gap, the detection end 21 is placed at a specified position, due to the existence of a gap between the detection end 21 and the fixed end 22, the first power cable and the second power cable are always in a disconnected state, the alarm does not work, and the probe 2 is used to detect the gap of the riveted copper nail, which is convenient to use and accurate in detection, wherein the alarm can use a buzzer.

[0051] Example 6

[0052] A method for detecting riveting gaps comprises the following steps:

[0053] 1) Move the insulating rubber plate to a specified position, energize the second powered cable and the first powered cable, and determine whether the second powered cable is connected to the first powered cable;

[0054] 2) When the second power cable is connected to the first power cable, the alarm sounds, that is, there is a gap at the riveted joint of the detected part; when the second power cable is disconnected from the first power cable, the alarm does not work, and there is no gap at the riveted joint of the detected part.

[0055] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0056] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0057] The present invention is described above by way of example. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by those skilled in the art without inventive effort falls within the protection scope of the present invention.

Claims

1. A device for detecting riveting gaps, characterized in that: It includes a support plate for placing the object to be detected, a plurality of probes and an insulating rubber plate driven to move up and down; The probe is connected to a first energized cable and is disposed on the insulating rubber plate, and the probe is used to approach or move away from the riveted copper nail on the part to be detected; The support plate is connected to a second power cable to energize the copper nails riveted on the part to be tested; The probe comprises a detection end, a fixed end and a sleeve for placing the detection end and the fixed end. The detection end and the fixed end are respectively arranged at two ends of the sleeve at intervals. The detection end is arranged on the inner wall of the sleeve so that it is forced to move along the inner wall of the sleeve and contact the fixed end. A proximity sensor and an electromagnet are provided on one side of the support plate close to the part to be detected, wherein the proximity sensor is used to detect the distance between the part to be detected and the support plate, and the electromagnet is used to adsorb the part to be detected onto the support plate; A bottom plate is provided below the support plate for positioning the support plate, a plurality of support columns are provided on the bottom plate at intervals, grooves matching the support columns are provided on the periphery of the support plate, and the support columns extend along the support plate through the grooves to the to-be-detected part for positioning the to-be-detected part; The device for detecting the riveting gap also includes a driving mechanism, which includes a cylinder, a linear guide installed on the support plate, a lower limit block arranged below the linear guide, an upper limit block arranged above the linear guide, and a slider for moving the insulating rubber plate along the linear guide. The cylinder body of the cylinder is vertically installed on the base plate, the top end of the telescopic rod of the cylinder is connected to the slider through a support rod, the top end of the support rod is connected to the telescopic rod, and the bottom end of the support rod is connected to the slider, wherein the top end of the support rod is arranged corresponding to the upper limit block, and the upper limit block and the lower limit block are used to limit the moving position of the insulating rubber plate.

2. The device for detecting riveting gap according to claim 1, characterized in that: The support rod is a "Z"-shaped structure, the bottom end of the support rod is installed on the side of the slider to drive the slider to move, and the top end is connected to the top end of the telescopic rod and is arranged corresponding to the upper limit block.

3. The device for detecting riveting gap according to claim 1, characterized in that: A plurality of linear rails matching the probes are arranged on the lower bottom surface of the insulating rubber plate. The fixed end of the probe is positioned on the linear rail by a positioning block for adjusting the position of the probe forward and backward. The positioning block is limited in the linear rail.

4. The device for detecting riveting gap according to claim 1, characterized in that: The device for detecting the riveted gap also includes a controller, a power supply and an alarm, wherein the controller is respectively connected to the power supply, the alarm, the proximity sensor and the electromagnet, wherein the power supply, the second power cable, the controller, the alarm, the first power cable and the probe form a loop for detecting the riveted gap.

5. The device for detecting riveting gap according to claim 1, characterized in that: The insulating rubber plate is made of insulating bakelite, and the supporting plate is provided with a through hole for connecting with the second power cable.

6. A detection method for a device for detecting riveting gaps according to any one of claims 1 to 5, characterized in that: The steps include: 1) moving the insulating rubber plate to a designated position, energizing the second powered cable and the first powered cable, and determining whether the second powered cable is connected to the first powered cable; 2) When the second power cable is connected to the first power cable, the alarm sounds, that is, there is a gap at the riveted joint of the detected part; when the second power cable is disconnected from the first power cable, there is no gap at the riveted joint of the detected part.

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