Floating welding jig and welding equipment
By designing a floating welding fixture, adaptive adjustment was achieved, which solved the problems of incomplete welding and poor welding of the door lock nut plate of the rear door frame of automobiles, and improved welding quality and replacement speed.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2026-03-24
AI Technical Summary
In the existing technology, the door lock nut plate of the rear door frame of automobiles is large in size and has many protrusions, which cannot be welded using traditional electrodes, resulting in problems such as incomplete welding and poor welding. In particular, welding defects caused by the mismatch between electrode perpendicularity and plane are frequent during product switching.
A floating welding fixture was designed, including first and second mounting components. The first positioning component is used to support the lower B support, and the second positioning component is used to restrict the rotation of the nut plate. Adaptive floating adjustment is achieved through the adjustment structure to ensure that the nut plate is perpendicular to the electrode seat and avoid incomplete welding.
This effectively solved the problem of misfitting between the nut plate and the rear B-type lower bracket plane, improved welding quality, reduced the occurrence of incomplete welds, and accelerated the speed of fixture replacement.
Smart Images
Figure CN224026844U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive parts welding technology, and in particular to a floating welding fixture and welding equipment. Background Technology
[0002] Raised spot welding is commonly used in automotive parts, typically to weld various raised nuts onto different components. These raised nuts are small in size with concentrated raised points, allowing for welding with a single cylindrical electrode in a single pass. However, door lock nut plates for automotive rear door frames, which secure the door lock latch, require significantly higher strength. These nut plates are larger than other raised spot products, with more raised points (four in total), making simple double-forked electrode welding unsuitable. Furthermore, the distance between the raised points is considerable, preventing the use of a single cylindrical electrode for welding like a single raised nut. Additionally, due to the large distance between weld points and the extremely short welding cycle time (approximately 0.02 seconds) of a fixed spot welding machine, some raised points may not be fully fused after one welding cycle, resulting in insufficient weld strength and incomplete welds.
[0003] Furthermore, since the electrodes and fixtures of a fixed spot welding machine are matched independently, defects such as poor downward welding and misfitting of the nut plate and the rear B-lower bracket body plane can occur when the electrode pressing welding direction is not perpendicular to the nut plate plane or the rear B-lower bracket body plane, or when the nut plate plane is not parallel to the rear B-lower bracket body plane. Fixed spot welding machines often require product switching and electrode replacement, so these problems of non-perpendicular electrodes and uneven welding surfaces frequently occur after product switching and mold changes. Utility Model Content
[0004] This application aims to solve one of the aforementioned technical problems in the prior art. Therefore, embodiments of this application provide a floating welding fixture.
[0005] This application also provides a welding device.
[0006] According to an embodiment of the first aspect of this application, a floating welding fixture is provided, including...
[0007] First installation component;
[0008] The second mounting component is floatingly disposed on the first mounting component;
[0009] A first positioning component is disposed on the second mounting component, and the first positioning component is used to support and position the lower bracket B after positioning.
[0010] A second positioning component is disposed on the second mounting component, and the second positioning component is used to restrict the rotation of the nut plate positioned on the rear B lower bracket.
[0011] The aforementioned floating welding fixture has at least the following beneficial effects: When in use, the floating welding fixture of this application is fixed to the welding equipment, and the rear B-type lower support is placed on the first positioning component. The first positioning component supports and positions the rear B-type lower support. Combined with the positioning pin of the lower electrode of the welding equipment, this effectively prevents displacement of the rear B-type lower support during welding. After the rear B-type lower support is positioned, the nut plate is positioned on the rear B-type lower support, and then the second positioning component positions the nut plate on the rear B-type lower support, simultaneously preventing rotation of the nut plate during welding. The first mounting component is fixed to the welding platform of the welding equipment, and the second mounting component is configured to float and connect with the first mounting component. Therefore, even if the floating welding fixture is not positioned precisely enough or its perpendicularity to the welding electrode is insufficient, adaptive floating adjustment can be performed during the welding process. This allows the welding surface of the nut plate or product positioned on the second mounting component to be adjusted to be perpendicular to the electrode seat, ensuring that the protrusions of the nut plate are always in contact with the product. This effectively solves the defect of the nut plate not fitting properly to the plane of the rear B-type lower support, avoiding the occurrence of incomplete welding on some protrusions.
[0012] According to the floating welding fixture of the first aspect of this application, the second mounting member is floatingly disposed on the first mounting member by means of an adjustment structure, so that the distance between the second mounting member and the first mounting member is adjustable and the included angle formed between the second mounting member and the first mounting member is adjustable.
[0013] According to the floating welding fixture of the first aspect of this application, the adjustment structure includes a plurality of first limiting members and a plurality of spring-loaded members, and a plurality of spring-loaded members are arranged in an array between the second mounting member and the second mounting member. The first limiting members are used to adjust the movable range of the second mounting member.
[0014] According to the floating welding fixture of the first aspect of this application, the first limiting member includes a rod and a head, the rod passing through the second mounting member and being threadedly connected to the first mounting member, and the head being used to restrict the second mounting member from detaching from the rod.
[0015] According to the floating welding fixture of the first aspect of this application, the spring-loaded element is a spring or a spring sheet, and the spring-loaded element causes the second mounting member to abut against the head.
[0016] According to the floating welding fixture described in the first aspect of this application, the first positioning component includes a first positioning member, a second positioning member, and a third positioning member. The first positioning member is used to support the lower B support, and the second and third positioning members are both used to position the side of the lower B support.
[0017] According to the floating welding fixture of the first aspect of this application, the second positioning member includes a telescopic fourth positioning member for positioning the side of the nut plate.
[0018] According to the floating welding fixture of the first aspect of this application, the second positioning member further includes a driving member, which is used to drive the extension and retraction of the fourth positioning member.
[0019] According to the floating welding fixture described in the first aspect of this application, the first mounting member and the second mounting member are provided with a clearance hole for the lower electrode to pass through at the same position.
[0020] According to an embodiment of the second aspect of this application, a welding apparatus is provided, including the floating welding fixture described above.
[0021] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0022] The present application will be further described below with reference to the accompanying drawings and embodiments;
[0023] Figure 1 This is a schematic diagram of the structure of the rear door frame of a car in an embodiment of this application;
[0024] Figure 2 This is a schematic diagram of the structure of the lower B-bracket in an embodiment of this application;
[0025] Figure 3 This is a schematic diagram of the nut plate structure in an embodiment of this application;
[0026] Figure 4 This is a schematic diagram of the welding equipment in an embodiment of this application;
[0027] Figure 5 This is a schematic diagram of the structure of the floating welding fixture in an embodiment of this application. Figure 1 ;
[0028] Figure 6 This is a schematic diagram of the structure of the floating welding fixture in an embodiment of this application. Figure 2 ;
[0029] Figure 7 This is a schematic diagram of the structure of the floating welding fixture in an embodiment of this application. Figure 3 ;
[0030] Figure 8 This is a schematic diagram of the structure of the floating welding fixture in an embodiment of this application. Figure 4 ;
[0031] Figure 9This is a schematic diagram of the upper electrode holder and the lower electrode holder before welding in an embodiment of this application;
[0032] Figure 10 This is a schematic diagram of the welding of the upper electrode holder and the lower electrode holder in an embodiment of this application.
[0033] Reference numerals: Equipment body 100, upper electrode seat 110, lower electrode seat 120, positioning pin 121, floating welding fixture 200, clearance hole 201, first mounting component 210, second mounting component 220, second positioning component 230, first positioning component 240, third positioning component 241, driving component 251, fourth positioning component 252, first limiting component 261, springback component 262, car rear door frame 300, rear B lower bracket 400, main board 410, reinforcing ear 420, connecting hole 430, nut plate 500, plate body 510, protrusion 511, nut component 520. Detailed Implementation
[0034] This section will describe in detail the specific embodiments of this application. Preferred embodiments of this application are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of this application, but they should not be construed as limiting the scope of protection of this application.
[0035] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0036] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0037] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.
[0038] Reference Figure 1 The rear door frame 300 of the car in this application embodiment includes a frame body, a rear B-type lower bracket 400 is provided on the frame body, and a nut plate 500 is provided on the rear B-type lower bracket 400.
[0039] in, Figure 2 This is a structural diagram of the rear B-mount bracket 400. The rear B-mount bracket 400 includes a main board 410, a reinforcing ear 420 on one side of the main board 410, and a connection hole 430 on the main board 410.
[0040] in, Figure 3 The diagram shows the structure of the nut plate 500. The nut plate 500 includes a plate body 510. A nut part 520 is provided on one side of the plate body 510, and a protrusion 511 is provided on the other side. When the nut plate 500 is welded to the rear B lower bracket 400, the nut hole of the nut part 520 is concentric with the connecting hole 430.
[0041] Figure 4 The welding equipment provided in this application embodiment includes a floating welding fixture 200, which is used to position and limit the rear B lower bracket 400 and the nut plate 500 so as to quickly position the rear B lower bracket 400 and the nut plate 500 for welding.
[0042] Furthermore, the welding equipment includes a main body 100, an upper electrode holder 110, and a lower electrode holder 120. A welding platform is provided on the main body 100, and a floating welding fixture 200 is detachably installed on the welding platform so that different floating welding fixtures 200 can be replaced according to different products. The lower electrode holder 120 is fixed below the welding platform, and the upper electrode holder 110 is set above the welding platform. The upper electrode holder 110 can move to cooperate with the lower electrode holder 120 to complete the welding operation.
[0043] In general, in order to accurately position the product, a positioning pin 121 is provided on the welding head of the lower electrode holder 120. The positioning pin 121 is used to position the product to be welded.
[0044] like Figures 5 to 8 As shown, the floating welding fixture 200 provided in this application includes a first mounting member 210, a second mounting member 220, a first positioning member, and a second positioning member.
[0045] The first mounting component 210 serves as the mounting reference, and all other parts or components are fixed to the first mounting component 210.
[0046] Furthermore, the second mounting member 220 is floatingly disposed on the first mounting member 210; the first positioning member is disposed on the second mounting member 220, and the first positioning member is used to support and position the rear B lower bracket 400; the second positioning member is also disposed on the second mounting member 220, wherein the second positioning member is used to restrict the rotation of the nut plate 500 positioned on the rear B lower bracket.
[0047] In use, the corresponding floating welding fixture 200 is selected according to the product model and fixed on the welding equipment. The rear B lower bracket 400 is placed on the first positioning component. The first positioning component supports and positions the rear B lower bracket 400. In conjunction with the positioning pin 121 of the lower electrode of the welding equipment, the displacement of the rear B lower bracket 400 during welding can be effectively prevented. After the rear B lower bracket 400 is positioned, the nut plate 500 is positioned on the rear B lower bracket 400. Then, the second positioning component positions the nut plate 500 on the rear B lower bracket 400, while preventing the nut plate 500 from rotating during welding.
[0048] The first mounting component 210 is fixed to the welding platform of the welding equipment, and the second mounting component 220 is configured to float and connect with the first mounting component 210. Therefore, even if the floating welding fixture 200 is not positioned accurately or is not perpendicular to the welding electrode, it can still make adaptive floating adjustments during the welding process. This allows the welding surface of the nut plate 500 or the product positioned on the second mounting component 220 to be adjusted to be perpendicular to the electrode seat, ensuring that the protrusions 511 of the nut plate 500 can always be in contact with the product. This effectively solves the defect that the nut plate 500 does not fit the plane of the rear B lower bracket 400, and avoids the situation of some protrusions 511 being poorly welded.
[0049] In some embodiments, the second mounting member 220 is floatingly disposed on the first mounting member 210 by means of an adjustment structure, so that the distance between the second mounting member 220 and the first mounting member 210 is adjustable and the included angle formed between the second mounting member 220 and the first mounting member 210 is adjustable.
[0050] The adjustment structure allows the product positioned on the second mounting piece 220 to adaptively adjust the perpendicularity of its welding surface to the electrode holder under the force conditions, even if the first mounting piece 210 is not parallel to the welding platform or not perpendicular to the electrode holder. This reduces the positioning requirements of the floating welding fixture 200 of this application, greatly speeds up the fixture replacement process, and avoids the generation of incomplete welds.
[0051] In some embodiments, the adjustment structure includes a plurality of first limiting members 261 and a plurality of spring-loaded members 262, and a plurality of spring-loaded members 262 are arranged in an array between the second mounting members 220. The first limiting members 261 are used to adjust the movable range of the second mounting members 220.
[0052] Specifically, several spring-loaded components 262 are evenly distributed in the middle and edge positions of the side of the first mounting component 210 facing the second mounting component 220, so that the second mounting component 220 can be floated and adjusted in all places, while the first limiting component 261 plays the role of limiting and preventing the second mounting component 220 from detaching from the first mounting component 210.
[0053] The spring-loaded component 262, in conjunction with the first limiting component 261, allows the floating range of the second mounting component 220 to be set within a certain adjustable range. This also allows the second mounting component 220 to adjust the angle with the first mounting component 210 according to the force applied, so that the welding surface of the product positioned on the second mounting component 220 can be adaptively adjusted to be perpendicular to the electrode seat, effectively improving the welding quality.
[0054] In some examples, the first limiting member 261 includes a rod and a head. The rod passes through the second mounting member 220 and is threadedly connected to the first mounting member 210. The head is used to restrict the second mounting member 220 from disengaging from the rod. The length of the rod minus the thickness of the second mounting member 220 is the range of motion of the second mounting member 220. The second mounting member 220 is provided with a guide hole through which the rod passes. The diameter of the guide hole is larger than that of the rod to provide sufficient adjustment space for the second mounting member 220. The diameter of the head is larger than that of the guide hole to restrict the second mounting member 220 from disengaging from the rod.
[0055] In some embodiments provided in this application, the first limiting member 261 is an equal-height screw.
[0056] In this embodiment, the spring 262 is a spring or a spring sheet, which causes the second mounting member 220 to abut against the joint. During welding, the upper electrode seat 110 presses back the product, causing the second mounting member 220 to be finely adjusted toward the first mounting member 210, and the welding position of the product is accurately positioned by the positioning pin 121 on the lower electrode seat 120.
[0057] To prevent the spring-loaded component 262 from detaching and falling off during use, both the first mounting component 210 and the second mounting component 220 are provided with limiting holes, which are used to position and limit the spring-loaded component 262.
[0058] In some embodiments, the first positioning component includes a first positioning element 240, a second positioning element 230, and a third positioning element 241. The first positioning element 240 is used to support the lower B support 400, and the second positioning element 230 and the third positioning element 241 are both used to position the side of the lower B support 400.
[0059] The first positioning member 240 is used to support the bottom of the motherboard 410 of the rear B lower bracket 400. Two second positioning members 230 are provided. The second positioning member 230 is used to position and limit the opposite sides of the motherboard 410. The third positioning member 241 cooperates with the first positioning member 240 to position the reinforcing ear 420.
[0060] In this embodiment, the third positioning member 241 is disposed on the first positioning member 240, and the third positioning member 241 forms a reference positioning angle with the lower positioning member. The third positioning member 241 is disposed opposite to the second positioning member, which facilitates the loading and unloading of the lower support 400.
[0061] In some embodiments, the second positioning member includes a telescopic fourth positioning member 252, which is used to position the side of the nut plate 500. The nut plate 500 is primarily positioned by a positioning pin 121 passing through the connecting hole 430. The fourth positioning member 252, in conjunction with the nut plate 500, prevents rotation during welding, thus improving welding accuracy. The telescopic nature of the fourth positioning member 252 facilitates product loading and unloading.
[0062] In a specific embodiment, the second positioning component further includes a driving member 251, which is used to drive the extension and retraction of the fourth positioning member 252. The driving member 251 can be one of a cylinder, a hydraulic cylinder, or an electric push rod.
[0063] In some embodiments, the first mounting member 210 and the second mounting member 220 are provided with clearance holes 201 for the lower electrode to pass through, so that the positioning pin 121 of the electrode holder can position the product.
[0064] in, Figure 9 and Figure 10 This is a welding diagram showing the cooperation between the upper electrode seat 110 and the lower electrode seat 120. The lower B bracket 400 and the nut plate 500 are positioned by the positioning pin 121 on the lower electrode seat 120. The first positioning component and the second positioning component work together to prevent the product from rotating. When the upper electrode seat 110 moves the product to fit with the lower electrode seat 120, the welding operation can be performed.
[0065] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.
Claims
1. A floating welding fixture, characterized in that: include First installation component; The second mounting component is floatingly disposed on the first mounting component; A first positioning component is disposed on the second mounting component, and the first positioning component is used to support and position the lower bracket B after positioning. A second positioning component is disposed on the second mounting component, and the second positioning component is used to restrict the rotation of the nut plate positioned on the rear B lower bracket.
2. The floating welding fixture according to claim 1, characterized in that: The second mounting component is floatingly disposed on the first mounting component by means of an adjustment structure, so that the distance between the second mounting component and the first mounting component is adjustable and the included angle formed between the second mounting component and the first mounting component is adjustable.
3. The floating welding fixture according to claim 2, characterized in that: The adjustment structure includes several first limiting members and several spring-loaded members. Several spring-loaded members are arranged in an array between the second mounting members. The first limiting members are used to adjust the movable range of the second mounting members.
4. The floating welding fixture according to claim 3, characterized in that: The first limiting member includes a rod and a head. The rod passes through the second mounting member and is threadedly connected to the first mounting member. The head is used to restrict the second mounting member from detaching from the rod.
5. The floating welding fixture according to claim 4, characterized in that: The spring-loaded component is a spring or a spring sheet, which causes the second mounting component to abut against the head.
6. The floating welding fixture according to claim 1, characterized in that: The first positioning component includes a first positioning element, a second positioning element, and a third positioning element. The first positioning element is used to support the lower B support, and the second and third positioning elements are both used to position the side of the lower B support.
7. The floating welding fixture according to claim 1, characterized in that: The second positioning member includes a telescopic fourth positioning element, which is used to position the side of the nut plate.
8. The floating welding fixture according to claim 7, characterized in that: The second positioning component further includes a driving component, which is used to drive the extension and retraction of the fourth positioning component.
9. The floating welding fixture according to claim 1, characterized in that: Both the first and second mounting members have clearance holes at the same location for the lower electrode to pass through.
10. A welding device, characterized in that: Includes the floating welding fixture described in any one of claims 1 to 9.