CN112046010A

CN112046010A - Welding head and method for optimizing welding performance of rear partition plate of passenger vehicle trunk

Info

Publication number: CN112046010A
Application number: CN202010761834.XA
Authority: CN
Inventors: 汤莉萍
Original assignee: Dongfeng Yanfeng Automotive Trim Systems Co Ltd
Current assignee: Dongfeng Yanfeng Automotive Trim Systems Co Ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2020-12-08

Abstract

The application relates to a welding head and a method for optimizing the welding performance of a rear partition plate of a passenger car trunk, wherein the welding head comprises a main body and welding teeth arranged on the top end of the main body in an array manner; the welding teeth have a cone tip type structure. The invention provides a welding head and a method for optimizing the welding performance of a rear partition plate of a passenger car trunk, and the method is characterized in that the top end of a welding tooth of the welding head is optimized to be in a cone top structure, the contact area of the welding tooth and a punctured part is small in the puncturing process, the insertion angle is large, the heat generated by the welding tooth of the welding head when the welding tooth is blocked in the puncturing process is easy to dissipate, the flash amount is small, and obvious welding slag appearance defects are not easy to generate; the welding quality is improved, and the problem that the rotary seat of the rear partition plate easily falls off in the process of turning motion is effectively solved.

Description

Welding head and method for optimizing welding performance of rear partition plate of passenger vehicle trunk

Technical Field

The application relates to the technical field of vehicle accessories, in particular to a method for optimizing welding performance of a rear partition plate.

Background

The luggage box of the two-compartment passenger car is an important storage space on the car, and the utilization rate is extremely high. The rear partition board is attached to a trunk of the two-compartment passenger car, and a plastic rotating shaft seat is welded on the rear partition board, plays a role in hinge movement with an interior trim part of the trunk and is used for controlling actions such as overturning of the rear partition board assembly. The functional use of baffle assembly behind the direct influence of the welding strength of pivot seat on the baffle of back, if the pivot seat is poor in the welding outward appearance on the baffle body of back, the not enough function that can lead to the baffle body of back of intensity is inefficacy. Causing sensory discomfort to the occupant, causing strong complaints from the user.

At present, a rotating shaft seat is welded on a rear clapboard body through ultrasonic, please refer to fig. 3-4, a welding tooth 110 on a welding head 100 is in a square structure, the distance between two adjacent welding teeth is small, the contact area with a punctured piece is large in the welding process, and the appearance defect of welding slag with large flash is obvious; the welding teeth of the welding head adopt a conventional titanium alloy square structure; among the prior art, the composite bed structure of back baffle material includes PET non-woven fabrics 210, PP glass fiber board 220 and PE glued membrane layer 230, and back baffle plate material is conventional compound, and welded pivot seat solder joint outward appearance and welding strength are poor, and back baffle is at the inside upset in-process of suitcase, and under the atress condition, the pivot seat drops from the back baffle, causes the function inefficacy.

Disclosure of Invention

The embodiment of the application provides a welding head and a method for optimizing the welding performance of a rear partition plate of a trunk of a passenger car, and aims to solve the problems that in the related art, the appearance and the welding strength of welding points of a rotating shaft seat are poor after welding.

The invention provides a welding head which comprises a main body and welding teeth arranged in an array manner and arranged on the top end of the main body; the welding teeth have a cone tip type structure.

In some embodiments, the welding teeth are provided in a truncated cone configuration.

In some embodiments, the spacing between two adjacent welding teeth is 4-8 mm.

In some embodiments, the welding teeth are made of steel material.

In a second aspect, the invention provides a method for optimizing the welding performance of a rear luggage compartment partition of a passenger car, which controls the welding head to weld the rear luggage compartment partition.

In some embodiments, the luggage back panel is provided as a composite panel structure including a polyethylene terephthalate (PET) backing cloth layer, a polypropylene (PP) glass fiber layer, and a Polyethylene (PE) glue film layer.

In some embodiments, a polypropylene (PP) layer is disposed between the polyethylene terephthalate (PET) backing cloth and the polypropylene (PP) fiberglass layer.

In some embodiments, the polypropylene (PP) layer has a thickness of 3-5 mm.

The beneficial effect that technical scheme that this application provided brought includes:

compared with the conventional welding teeth of a square trapezoid welding head, the welding teeth of the welding head have large contact area with a part to be punctured and small insertion angle in the puncturing process, so that heat generated by blocking the welding teeth of the welding head is not easy to dissipate in the puncturing process, the flash amount is large, and the appearance defect of welding slag is obvious; the welding quality is improved, and the problem that the swivel seat is easy to fall off in the process of turning the rear partition plate is effectively solved; according to the invention, the tip end of the welding tooth of the welding head is optimized to be in the conical top shape, so that on one hand, the contact area and angle of welding puncture of the welding tooth of the welding head can be optimized, on the other hand, the tooth head with the step structure can press molten rubber into the puncture hole again, the internal molten rubber amount is increased, and meanwhile, the welding tooth spacing is increased, and the appearance defects such as flash and the like are improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a bonding tool according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of a tooth portion in a direction D-D in FIG. 1 according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of a prior art bonding tool;

FIG. 4 is a schematic cross-sectional view of a portion of the weld head of FIG. 3 taken along the line B-B;

FIG. 5 is a schematic structural view of one embodiment of a rear bulkhead material;

fig. 6 is a schematic structural diagram of another embodiment of a rear partition material provided by the present invention.

In the figure: 1. a main body; 11. welding teeth; 21. a back lining cloth layer; 22. a polypropylene layer; 23. a glass fiber layer; 24. a glue film layer; 100. welding a head; 110. welding the teeth; 210. PET non-woven fabric; 220. a PP glass fiber board; 230. PE film layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a welding joint and a method for optimizing the welding performance of a rear partition plate of a trunk of a passenger car, and the method can solve the problems that the function of a rear partition plate body fails due to insufficient welding strength of a rotary seat of the rear partition plate, and potential safety hazards of passengers are caused.

Referring to fig. 1-2, a welding head includes a main body 1 and welding teeth 11 arranged in an array on the top of the main body 1; the welding teeth 11 have a cone tip type structure.

Referring to fig. 2, it can be seen from the cross section D-D in fig. 1 that the welding teeth 11 are provided with a cone-top structure, which can effectively increase the distance between the welding teeth 11.

The embodiment of the application provides a welding performance optimization method for a welding head and a rear partition plate of a passenger car trunk, compared with the defects that the contact area of a welding tooth 11 of a square trapezoidal welding head with a punctured part is large and the insertion angle is small in the puncturing process, so that heat generated by blocking the welding tooth 11 of the welding head in the puncturing process is not easy to dissipate, the overflowing amount is large, the appearance of welding slag is obvious and the like, the top end of the welding tooth 11 of the welding head is optimized to be in a conical top shape, on one hand, the contact area and the angle of welding puncturing of the welding tooth 11 of the welding head can be optimized, on the other hand, the welding tooth 11 of a step structure can press molten rubber into a puncturing hole again, the internal molten rubber amount of the puncturing part is increased, the welding quality is improved, the welding fixing effect between a rotary seat and the rear partition plate is improved, the problem that the rotary seat is easy to fall off in the overturning motion process of the, when the adjacent welding teeth 11 are punctured and welded, the molten rubber is not easy to accumulate and redundant to overflow, and the defects of appearance flash and the like are effectively overcome.

As described above, according to the present invention, the welding teeth 11 may be implemented as a truncated cone structure, a truncated cone structure with a cambered surface, a truncated pyramid structure with a regular polygonal pyramid, or the like, as long as the top of the welding teeth 11 is a pointed structure, and the shape of the welding teeth 11 is gradually widened from the top toward the welding head.

In a preferred embodiment, the welding teeth 11 are designed to be of a cambered surface frustum structure, the cambered surface is a concave cambered surface, that is, the outer side edge of the longitudinal section of the frustum is shaped like an inward concave arc, and the gradually-wide outer cambered surface of the frustum can smoothly press molten rubber into the puncture hole in the puncturing process of the welding teeth 11 of the cambered frustum, so that the amount of molten rubber in the puncturing part is increased, the welding quality is improved, the welding strength between the rotary seat and the rear partition plate of the luggage case is effectively improved, and meanwhile, the welding appearance defect caused by the excessive rubber is reduced.

In a specific embodiment, the distance between two adjacent welding teeth 11 is 4-8 mm.

In a preferred embodiment, the welding teeth 11 are made of steel. Because the material of soldered connection puncture welding part is PP glass fiber board (taking PET backing cloth) and PP-GF20 material injection molding, these two kinds of parts all contain fine composition of glass, there is more serious wearing and tearing to conventional titanium alloy bonding tool, bonding tool welding tooth 11 after being worn and torn has similar barb structure, there is the power of a reverse pull-up and the defect of welding slag wire drawing to the part when leading to among the welding process bonding tool welding tooth 11 to withdraw, be the better steel material of wearability through optimizing bonding tool material, can effectively improve the wear resistance of bonding tool welding tooth 11.

According to the invention, the welding head of the welding teeth 11 with the conical top structure is adopted to weld the rotary seat on the rear partition plate, and as the contact area between the welding teeth 11 with the conical top structure and a punctured part is small, the insertion angle is large, heat generated by the welding teeth 11 of the welding head at hand and foot is easy to dissipate in the puncturing process, the flash amount is small, the welding appearance defect is not easy to generate, the welding quality is better, and the problem that the rotary seat is easy to fall off in the overturning motion process of the rear partition plate is effectively solved; because there is welding tooth 11 to be the trapezoidal heavy platform structure of cylinder, weld tooth 11 and can press the fused sizing material into the puncture hole through self structure in welding process, increase the inside melten gel volume of puncture hole, promote welding strength, reduce the condition appearance that the melten gel is excessive and cause appearance defect.

In one embodiment, referring to fig. 5, the rear partition board of the luggage case is a composite board structure, the composite board structure includes a polyethylene terephthalate (PET) backing fabric layer 21, a polypropylene (PP) glass fiber layer 23, and a Polyethylene (PE) adhesive film layer 24, and the point a is the piercing point of the welding teeth 11 of the welding head.

In a preferred embodiment, referring to fig. 6, a polypropylene (PP) layer is disposed between the polyethylene terephthalate (PET) backing fabric layer 21 and the polypropylene (PP) glass fiber layer 23, when the welding horn teeth 11 penetrate into the PET backing fabric layer 21, the polypropylene layer 22 and the glass fiber layer 23, the added polypropylene layer 22 is heated and melted to increase the glue melting amount between the PP-GF20 material injection molding and the glass fiber layer 23, so as to improve the welding strength of the PP-GF20 material injection molding to the rear partition board, and the point C is the penetration point of the welding horn teeth 11, i.e., the welding horn teeth 11 penetrate into the glass fiber layer 23 from the outer backing fabric layer 21 and the polypropylene layer 22 of the composite material, and the polypropylene layer 22 is heated and melted to increase the welding strength and improve the welding quality, so that the welding connection between the rotary base and the rear partition board is firmer.

In one embodiment, the polypropylene layer 22 has a thickness of 3-5mm to provide a sufficient amount of flux to effectively improve the weld strength.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A welding head, comprising:

the welding device comprises a main body and welding teeth arranged in an array manner and arranged on the top end of the main body; the welding teeth have a cone tip type structure.

2. The welding head of claim 1 wherein said welding teeth are configured as a truncated cone configuration.

3. The welding head of claim 1 wherein the spacing between adjacent teeth is 4-8 mm.

4. The welding head as defined in claim 1 wherein said teeth are formed of a steel material.

5. A method for optimizing the welding performance of a rear partition plate of a passenger car trunk is characterized in that,

controlling the welding head according to any of the claims 1-4 to weld the luggage compartment rear partition.

6. The method of claim 5, wherein the luggage back panel is provided as a composite panel structure comprising a backing cloth layer, a glass fiber layer, and a glue film layer.

7. The method of claim 6, wherein a polypropylene layer is disposed between the backing cloth and the fiberglass layer.

8. The method of claim 7, wherein the polypropylene layer has a thickness of 3 to 5 mm.