A welding fixture anti-overlapping tool detection mechanism
The detection mechanism combining micro-motion sensors and pressure blocks solves the instability problem of thin-part stack detection in welding fixtures, achieving efficient and accurate part overlap detection, and improving production efficiency and welding quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN CHANGHUA CHUANGYUAN AUTO PARTS CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-31
AI Technical Summary
In the prior art, when welding fixtures inspect stacked thin parts, the cylinder stroke sensor cannot make stable detection, resulting in poor detection results, especially when the thickness difference of the parts is small, and it cannot effectively prevent overlap.
The detection mechanism combines a micro-motion sensor with a pressure block. By cooperating with the second pressure block, the displacement change caused by the increase in thickness when parts overlap triggers a change in the switch state, thereby realizing the automatic detection of overlapping parts.
It enables precise detection of overlapping parts, improves the response speed and accuracy of detection, avoids welding quality problems, and has a simple structure and low cost, making it suitable for industrial promotion.
Smart Images
Figure CN224580907U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of display technology, and more specifically, to a welding fixture anti-overlap tooling inspection mechanism. Background Technology
[0002] Currently in automobile manufacturing, most stacked parts rely on tooling cylinder positioning signals, which are fed back to the PLC controller. The PLC then determines whether stacked parts exist to prevent errors. However, for some thin welded parts, using tooling cylinder positioning signals for prevention is difficult and unstable. With height differences of 0.25mm-0.5mm between stacked parts, adjusting the cylinder signal alone cannot guarantee detection effectiveness. Therefore, a highly sensitive sensor is needed to indirectly transmit positioning signals to the PLC controller for anti-overlap detection.
[0003] During the welding and assembly process, if parts are stacked, the previous solution involved adjusting the position sensor on cylinder 17. After clamping, the sensor transmitted the data to the PLC controller to determine if the parts were properly installed and whether they were stacked. This method is limited by the thickness of the parts. For very thin parts, the change in position when the clamping arm is in place is too small, and the cylinder stroke sensor cannot reliably detect this.
[0004] Therefore, it is necessary to propose a solution for a welding fixture anti-overlap tooling inspection mechanism. Utility Model Content
[0005] This utility model provides a welding fixture anti-overlap tooling detection mechanism, which solves the technical problem that the above-mentioned cylinder stroke sensor cannot reliably detect workpiece overlap by combining a micro-motion sensor with a pressure block.
[0006] According to one aspect of the present invention, a welding fixture anti-overlap tooling detection mechanism is provided, comprising a base, a cylinder, and a connecting arm. The base is provided with a vertical plate and a side plate. The connecting arm is hinged to the side plate and to the telescopic rod of the cylinder mounted on the side plate. A first pressure block and a connecting plate are installed at the end of the connecting arm. A second pressure block is installed on the bottom surface of the connecting plate. A micro-motion sensor is installed on the vertical plate. The micro-motion sensor is disposed opposite to the second pressure block.
[0007] Preferably, based on the above scheme, the upright plate is L-shaped and includes a horizontal plate and a vertical plate, the horizontal plate is connected to the vertical plate, the vertical plate is connected to the base, and the horizontal plate extends to one side of the second pressure block.
[0008] Based on the above scheme, a preferred embodiment is provided where a U-shaped mounting base is installed at the bottom of the horizontal plate, the micro-motion sensor is installed inside the mounting base, and a protective cover is installed on the micro-motion sensor.
[0009] Preferably, based on the above scheme, the top of the side plate is provided with an H-shaped limiting block, and the bottom of the connecting arm is movably locked in the limiting block.
[0010] Preferably, based on the above scheme, a hinge seat is provided on the side plate, and the connecting arm is connected to the side plate through the hinge seat.
[0011] Preferably, based on the above scheme, the cylinder is fixed on the side plate.
[0012] This utility model discloses a welding fixture anti-overlap tooling detection mechanism. A micro-motion sensor is set opposite to a second pressure block. When a part is pressed on the micro-motion sensor, the micro-motion sensor will change its on / off state due to the different weights of the parts, thereby determining whether there are overlapping parts. It is convenient and quick to install and use. Attached Figure Description
[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:
[0014] Figure 1 This is a schematic diagram of the structure of a welding fixture anti-overlap tooling detection mechanism according to the present invention;
[0015] Explanation of icon numbers:
[0016] 1. Base; 2. Cylinder; 3. Side plate; 4. Connecting arm; 41. First pressure block; 42. Connecting plate; 43. Second pressure block; 44. Limiting block; 45. Hinge seat; 46. Adjusting shim; 5. Vertical plate; 51. Horizontal plate; 52. Vertical plate; 53. Micro-motion sensor; 54. Mounting base; 55. Protective cover. Detailed Implementation
[0017] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0018] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of a descriptive feature, integral, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or sets.
[0019] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."
[0020] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.
[0021] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various components of this invention are relative rather than absolute. These descriptions are appropriate when these components are in the positions shown in the drawings. If the descriptions of the positions of these components change, these directional indications also change accordingly.
[0022] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.
[0024] Please see Figure 1 As shown, the present invention provides a welding fixture anti-overlap tooling detection mechanism, which includes a base 1, a cylinder 2, and a connecting arm 4.
[0025] In this invention, a vertical plate 5 and a side plate 3 are installed on the base 1. A connecting arm 4 is hinged to the side plate 3. The connecting arm 4 is hinged to the telescopic rod of the cylinder 2 installed on the side plate 3. When the telescopic rod of the cylinder 2 extends or retracts, it will drive the connecting arm 4 to rotate around the hinge point.
[0026] The present invention also has a first pressure block 41 and a connecting plate 42 installed at the end of the connecting arm 4. The connecting plate 42 is arranged perpendicularly to the connecting arm 4, and a second pressure block 43 is installed on the bottom surface of the connecting plate 42. The vertical plate 5 is equipped with a micro-motion sensor 53, which is arranged opposite to the second pressure block 43.
[0027] Furthermore, this utility model also provides an adjustable shim 46 between the second pressure block 43 and the connecting plate 42. The micro-motion sensor 53 has a detection distance of 0.2mm, which can be used to accurately determine whether the parts are stacked.
[0028] Specifically, the upright plate 5 of this utility model is L-shaped and includes a horizontal plate 51 and a vertical plate 52. The horizontal plate 51 is connected to the vertical plate 52, and the vertical plate 52 is connected to the base 1. The horizontal plate 51 extends to one side of the second pressure block 43. A U-shaped mounting base 54 is installed at the bottom of the horizontal plate 51. The micro-motion sensor 53 is installed in the mounting base 54, and a protective cover 55 is installed on the micro-motion sensor 53.
[0029] When there is only one part, the first pressure block 41 is pressed tightly against the part. At this time, the second pressure block 43 is pressed slightly against the micro-motion sensor 53. The shim 46 is adjusted until the micro-motion sensor 53 outputs ON. The PLC controller determines that the welding is normal.
[0030] When there are only stacked parts, the first pressure block 41 presses down on the parts. At this time, the second pressure block 43 is raised. The micro-motion sensor 53 determines the stacked parts by the distance difference. The signal is in the off state, the output is OFF, and the signal is transmitted to the PLC to determine the stacked parts.
[0031] When there are no parts available, the second pressure block 43 presses down on the protective cover 55, which protects the micro-motion sensor 53 from damage. The PLC controller determines that soldering is not possible based on the part's own sensor.
[0032] Furthermore, the present invention also provides an H-shaped limiting block 44 at the top of the side plate 3, the bottom of the connecting arm 4 is movably locked in the limiting block 44, a hinge seat 45 is provided on the side plate 3, and the connecting arm 4 is connected to the side plate 3 through the hinge seat 45 and the cylinder 2 is fixed on the side plate 3.
[0033] During operation: The telescopic rod of cylinder 2 extends, pushing the connecting arm 4 to swing downward around the hinge seat 45. The first pressure block 41 first contacts the part to be welded and presses it firmly onto the positioning surface. If the parts do not overlap (the thickness is the design value), the second pressure block 43 moves down with the connecting plate 42 and contacts the top surface of the part. At this time, there is still a gap between the second pressure block 43 and the micro-motion sensor 53 (or only slight contact, without triggering the switch state). If the parts overlap (the thickness is greater than the design value), the downward distance of the second pressure block 43 increases, which will directly press the sensing end of the micro-motion sensor 53, triggering a change in the switch state (such as sending an electrical signal to the control system). After receiving the signal, the control system can alarm or suspend welding to achieve error prevention.
[0034] When the cylinder 2 telescopic rod retracts, the connecting arm 4 returns to its original position, the pressure block disengages from the part, and awaits the next inspection.
[0035] With the above structure, overlap detection can be completed simultaneously during the part positioning and clamping process, effectively avoiding welding quality problems caused by part overlap and improving production efficiency.
[0036] This invention solves the problem of overlapping detection of parts in welding fixtures by combining a simple mechanical structure with a micro-motion sensor 53. It features simple structure, low cost, and strong practicality, making it suitable for industrial application.
[0037] Compared with existing technologies:
[0038] Precise and efficient detection: By cooperating with the micro-motion sensor 53 and the second pressure block 43, the displacement change of the second pressure block 43 caused by the increase in thickness when the parts overlap triggers the change in the state of the micro-motion sensor 53 (such as on / off signal), which can automatically and in real time determine whether the parts overlap without manual intervention. The detection response is fast and the accuracy is high.
[0039] The structure is stable and reliable: the L-shaped upright plate 5 ensures that the micro-motion sensor 53 and the second pressure block 43 are accurately aligned; the H-shaped limit block 44 restricts the offset of the connecting arm 4 and improves the stability of movement; the U-shaped mounting base 54 and the protective cover 55 protect the micro-motion sensor 53 and adapt to the complex environment of the welding workshop.
[0040] Highly adaptable to installation: The overall structure is fixed to the welding fixture via the base 1. The modular design of each component makes installation and debugging convenient. It can be adapted to welding fixtures of different specifications and has strong versatility.
[0041] Good integration: It is integrated with the clamping mechanism driven by cylinder 2, and the overlap detection is completed at the same time as the part is clamped and positioned, without the need for additional detection process and without affecting the welding cycle.
[0042] Finally, the method described in this application is merely a preferred embodiment and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A welding fixture anti-overlap tooling inspection mechanism, characterized in that, The device includes a base, a cylinder, and a connecting arm. The base is equipped with a vertical plate and a side plate. The connecting arm is hinged to the side plate and to the telescopic rod of the cylinder mounted on the side plate. The end of the connecting arm is equipped with a first pressure block and a connecting plate. The bottom surface of the connecting plate is equipped with a second pressure block. The vertical plate is equipped with a micro-motion sensor, which is positioned opposite to the second pressure block.
2. The welding fixture anti-overlap tooling inspection mechanism as described in claim 1, characterized in that, The upright plate is L-shaped and includes a horizontal plate and a vertical plate. The horizontal plate is connected to the vertical plate, and the vertical plate is connected to the base. The horizontal plate extends to one side of the second pressure block.
3. The welding fixture anti-overlap tooling inspection mechanism as described in claim 2, characterized in that, The bottom of the horizontal plate is equipped with a U-shaped mounting base, the micro-motion sensor is installed in the mounting base, and a protective cover is installed on the micro-motion sensor.
4. The welding fixture anti-overlap tooling inspection mechanism as described in claim 1, characterized in that, The top of the side plate is provided with an H-shaped limiting block, and the bottom of the connecting arm is movably locked in the limiting block.
5. The welding fixture anti-overlap tooling inspection mechanism as described in claim 1, characterized in that, A hinge seat is provided on the side plate, and the connecting arm is connected to the side plate through the hinge seat.
6. The welding fixture anti-overlap tooling inspection mechanism as described in claim 1, characterized in that, The cylinder is fixed to the side plate.