Welding fixture for detecting position degree of nut and preventing mistakes and omissions for automobile parts

Abstract

The utility model relates to a welding fixture for detecting the position degree of a nut and preventing mistakes and omissions for automobile parts, which comprises a main fixture group structure, an auxiliary fixture group structure and an auxiliary mounting piece detection fixture group structure, and is characterized in that the main fixture group structure comprises a main fixture connecting table, a main piece positioning fixture structure and a main piece pressing tool structure; the auxiliary clamp set structure comprises an auxiliary clamp table, an auxiliary positioning clamp structure and an auxiliary side end positioning clamp assembly, a first detection height limiting rod assembly is arranged on the upper portion of the main part positioning clamp structure, and a second detection height limiting rod assembly is arranged on the upper portion of the auxiliary positioning clamp structure. In actual application, the clamp body serves as a supporting structure and is used for positioning and placing the projection welding nut so as to be matched with a structural part of an automobile part workpiece for welding, the first detection height limiting rod assembly and the second detection height limiting rod assembly are matched with threaded holes of the projection welding nut to position the axis of the nut, and whether the nut is neglected to be installed or not is detected. And effective welding of the nut is ensured when the position of the nut is correct.

Description

Technical Field

[0001] The utility model relates to an automobile component welding fixture, in particular to an automobile component welding fixture with nut positioning and error-leakage prevention. Background Art

[0002] When further processing is performed on the stamped parts, it is often necessary to perform welding operations on the stamped parts according to actual production needs, fix the stamped parts on a welding fixture, weld the parts by welding, and process the parts into the required state. When welding the stamped parts, since the stamped parts are often stacked, during the welding process, the operator is likely to take two parts and place them on the welding fixture for welding, resulting in incorrect welding of parts and multiple welding, and the parts that are incorrectly welded or missed welding will be unusable, resulting in waste of parts. Publication number: CN218775948U A device for preventing incorrect welding or missed welding on a welding fixture, comprising a welding fixture base, a laser ranging sensor, a fixing bracket and a limiting mechanism, wherein the welding fixture base is directly placed on the ground, the laser ranging sensor is fixed to the middle of the mounting bracket by bolts, and the right end of the mounting bracket is fixedly connected to a movable column with a cylindrical structure, the fixing bracket is connected to the welding fixing column by a sliding manner, and the fixing bracket drives the laser ranging sensor to form a lifting structure above the welding fixture base, and the limiting mechanism is arranged on the right side of the connecting bracket. The error-proofing device on the welding fixture cannot perform welding when the laser distance sensor does not detect a signal, and the workstation prompts an error alarm, thereby effectively preventing error-proofing and missing welding. The above-mentioned error-proofing device has a simple structure and is not suitable for application in large and complex mold assemblies.

[0003] Numerous accessories need to be installed in the body-in-white (BIW) system of an automobile. To accommodate the installation of these accessories and other systems, the prior art employs a large number of projection weld nuts installed on the BIW as connectors. Conventional projection weld nuts are often welded manually. Automated welding requires expensive equipment, and automated equipment often requires specialized production lines, making it impractical for widespread use. Therefore, manual welding remains the primary method. During manual projection weld nut welding, manual placement of the nut can lead to missed welds or incorrectly placed legs due to operator error. To address missed welds, conventional fixtures utilize a detection mechanism that combines a proximity switch with a programmable logic controller (PLC) signal. When the proximity switch detects a projection weld nut, it outputs a signal to the PLC, which determines whether the next step can be taken. Publication No.: CN220445482U A device for preventing missed projection weld nuts includes a fixture body having a circular loading slot, a coaxial positioning column in the middle of the loading slot, an annular support ring within the loading slot, and a proximity switch located at the bottom of the loading slot, inside the support ring.

[0004] The aforementioned device for preventing leakage of projection welding nuts also has the disadvantage of being simple in structure and not suitable for application in large and complex mold assemblies. Utility Model Content

[0005] The utility model aims to provide an automobile component welding fixture with nut positioning and error-proofing function, so as to solve the application problem of nut positioning and error-proofing function in complex and large mold groups.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a welding fixture for automobile parts with nut positioning and anti-error and leakage, including a main fixture group structure and a sub-fixture group structure, the main fixture group structure and the sub-fixture group structure are arranged horizontally and an auxiliary installation part detection fixture group structure is arranged between the main fixture group structure and the sub-fixture group structure, the main fixture group structure includes a main fixture connecting platform, a main part positioning fixture structure arranged on the upper part of the main fixture connecting platform, and a main part clamping structure arranged on one side of the main part positioning fixture structure, the sub-fixture group structure includes an auxiliary fixture platform, an auxiliary positioning fixture structure arranged on the auxiliary fixture platform and an accessory side end positioning fixture assembly arranged on one side of the auxiliary positioning fixture structure, a first detection limit rod assembly for detecting the nut installation height is arranged on the upper part of the main part positioning fixture structure, and a second detection limit rod assembly for detecting the nut installation height is arranged on the upper part of the auxiliary positioning fixture structure.

[0007] The main part positioning fixture structure includes a main workpiece positioning profiling seat arranged on the main fixture connecting platform, and a group of main workpiece internal clamping components are arranged at the outer end of the main workpiece positioning profiling seat, and the first detection height limit rod component is arranged at the upper end of the lower main workpiece internal clamping component.

[0008] The main part clamping tool structure includes a main part clamping connection platform arranged on one side of the main clamp connection platform, a main part first clamping tool arranged on the upper part of the main part clamping connection platform, a main part second clamping tool and a main part third clamping tool.

[0009] The attached positioning fixture structure includes an accessory positioning profiling seat arranged on the attached fixture table, the accessory side end positioning fixture assembly includes an accessory upper end positioning fixture arranged at the upper end of the accessory positioning profiling seat, an accessory middle section positioning fixture arranged in the middle of the accessory positioning profiling seat, and an accessory lower end positioning fixture arranged at the lower end of the accessory positioning profiling seat, and the second detection limit height rod assembly is arranged at the lower outer end of the accessory positioning profiling seat.

[0010] The auxiliary mounting part detection fixture group structure includes an auxiliary mounting part detection base arranged on the main fixture connecting platform, a central support seat arranged on the upper part of the auxiliary mounting part detection base, a front auxiliary mounting part installation platform and a rear auxiliary mounting part installation platform arranged on the upper part of the central support seat.

[0011] The beneficial effects of the present invention are as follows: in actual application, the clamp body serves as a supporting structure for positioning and placing the projection welding nut to facilitate welding with the workpiece structure of the automotive component. The first detection limit rod assembly and the second detection limit rod assembly cooperate with the threaded hole of the projection welding nut to position the nut axis and detect whether the nut is missing. In addition, the correct position of the nut is ensured to ensure the effective welding of the nut.

[0012] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model.

[0014] Figure 2 for Figure 1 side view.

[0015] Figure 3 for Figure 1 Top view of .

[0016] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0017] Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0018] Figure 6 for Figure 1 Stereoscopic image.

[0019] In the figure: 1. Main fixture connecting platform, 2. Auxiliary fixture platform, 3. First detection limit height rod assembly, 4. Second detection limit height rod assembly, 5. Main workpiece positioning profiling seat, 6. Main workpiece internal clamping assembly, 7. Main part clamping connecting platform, 8. Main part first clamping tool, 9. Main part second clamping tool, 10. Main part third clamping tool, 11. Accessory positioning profiling seat, 12. Accessory upper end positioning fixture, 13. Accessory middle section positioning fixture, 14. Accessory lower end positioning fixture, 15. Auxiliary installation part detection base, 16. Center support seat, 17. Front end auxiliary installation part mounting platform, 18. Front end auxiliary installation part mounting platform. DETAILED DESCRIPTION

[0020] The terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end" used in this application to indicate positions or locations are based on the positions or locations shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0022] Example 1, as Figure 1-6 As shown, a welding fixture for automobile parts with nut positioning and anti-error and leakage function includes a main fixture group structure and a sub-fixture group structure. The main fixture group structure and the sub-fixture group structure are arranged horizontally and an auxiliary installation part detection fixture group structure is arranged between the main fixture group structure and the sub-fixture group structure. The main fixture group structure includes a main fixture connecting platform 1, a main part positioning fixture structure arranged on the upper part of the main fixture connecting platform, and a main part clamping fixture structure arranged on one side of the main part positioning fixture structure. The sub-fixture group structure includes an auxiliary fixture platform 2, an auxiliary positioning fixture structure arranged on the auxiliary fixture platform, and an accessory side end positioning fixture assembly arranged on one side of the auxiliary positioning fixture structure. A first detection limit height rod assembly 3 for detecting the nut installation height is arranged on the upper part of the main part positioning fixture structure, and a second detection limit height rod assembly 4 for detecting the nut installation height is arranged on the upper part of the auxiliary positioning fixture structure.

[0023] The main part positioning fixture structure includes a main workpiece positioning profiling seat 5 arranged on the main fixture connecting platform 1, and a group of main workpiece internal clamping components 6 are arranged at the outer end of the main workpiece positioning profiling seat, and the first detection height limit rod component 3 is arranged at the upper end of the lower main workpiece internal clamping component.

[0024] The main part clamping structure includes a main part clamping connection platform 7 arranged on one side of the main clamp connection platform 1, a main part first clamping tool 8, a main part second clamping tool 9 and a main part third clamping tool 10 arranged on the upper part of the main part clamping connection platform.

[0025] The attached positioning fixture structure includes an accessory positioning profiling seat 11 arranged on the attached fixture table, the accessory side end positioning fixture assembly includes an accessory upper end positioning fixture 12 arranged at the upper end of the accessory positioning profiling seat, an accessory middle section positioning fixture 13 arranged in the middle of the accessory positioning profiling seat, and an accessory lower end positioning fixture 14 arranged at the lower end of the accessory positioning profiling seat, and the second detection limit height rod assembly 4 is arranged at the lower outer end of the accessory positioning profiling seat 11.

[0026] The auxiliary mounting part detection fixture group structure includes an auxiliary mounting part detection base 15 arranged on the main fixture connecting platform, a central support seat 16 arranged on the upper part of the auxiliary mounting part detection base, a front end auxiliary mounting part mounting platform 17 arranged on the upper part of the central support seat, and a rear end auxiliary mounting part mounting platform 18.

[0027] In actual application, the clamp body serves as a support structure for positioning the projection weld nut to facilitate welding with the automotive component workpiece structure. The first and second detection limit rod assemblies cooperate with the threaded holes of the projection weld nut to position the nut axis and detect whether the nut is missing. It also ensures that the nut is correctly positioned to ensure effective welding of the nut.

[0028] The above embodiments are merely descriptions of preferred implementation methods of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering technicians in this field should fall within the scope of protection determined by the claims of the present invention.

[0029] The parts not involved in the present invention are the same as the existing technology or can be implemented by using the existing technology.

Claims

1. A welding fixture for detecting nut position and preventing errors and omissions for automobile parts, characterized by: It includes a main clamp group structure and a sub-clamp group structure, the main clamp group structure and the sub-clamp group structure are horizontally arranged and an auxiliary installation part detection clamp group structure is arranged between the main clamp group structure and the sub-clamp group structure, the main clamp group structure includes a main clamp connecting platform, a main part positioning clamp structure arranged on the upper part of the main clamp connecting platform, and a main part clamping structure arranged on one side of the main part positioning clamp structure, the sub-clamp group structure includes an auxiliary clamp platform, an auxiliary positioning clamp structure arranged on the auxiliary clamp platform and an accessory side end positioning clamp assembly arranged on one side of the auxiliary positioning clamp structure, a first detection limit rod assembly for detecting the installation height of the nut is arranged on the upper part of the main part positioning clamp structure, and a second detection limit rod assembly for detecting the installation height of the nut is arranged on the upper part of the auxiliary positioning clamp structure.

2. The welding fixture for detecting nut position and preventing errors and omissions for automobile parts according to claim 1, characterized in that: The main part positioning fixture structure includes a main workpiece positioning profiling seat arranged on the main fixture connecting platform, and a group of main workpiece internal clamping components are arranged at the outer end of the main workpiece positioning profiling seat, and the first detection height limit rod component is arranged at the upper end of the lower main workpiece internal clamping component.

3. The welding fixture for detecting nut position and preventing errors and omissions for automobile parts according to claim 1, characterized in that: The main part clamping tool structure includes a main part clamping connection platform arranged on one side of the main clamp connection platform, a main part first clamping tool arranged on the upper part of the main part clamping connection platform, a main part second clamping tool and a main part third clamping tool.

4. The welding fixture for detecting nut position and preventing errors and omissions for automobile parts according to claim 1, characterized in that: The attached positioning fixture structure includes an accessory positioning profiling seat arranged on the attached fixture table, the accessory side end positioning fixture assembly includes an accessory upper end positioning fixture arranged at the upper end of the accessory positioning profiling seat, an accessory middle section positioning fixture arranged in the middle of the accessory positioning profiling seat, and an accessory lower end positioning fixture arranged at the lower end of the accessory positioning profiling seat, and the second detection limit height rod assembly is arranged at the lower outer end of the accessory positioning profiling seat.

5. The welding fixture for detecting nut position and preventing errors and omissions for automobile parts according to claim 1, characterized in that: The auxiliary mounting part detection fixture group structure includes an auxiliary mounting part detection base arranged on the main fixture connecting platform, a central support seat arranged on the upper part of the auxiliary mounting part detection base, a front auxiliary mounting part installation platform and a rear auxiliary mounting part installation platform arranged on the upper part of the central support seat.

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