阅读说明：本技术 提高车用卤素灯灯丝配光性能的方法 (Method for improving light distribution performance of halogen lamp filament for vehicle ) 是由 何正安 刘先德 何伟强 于 2020-04-27 设计创作，主要内容包括：一种提高车用卤素灯灯丝配光性能的方法,其是先在对应于焊接工位的上方的位置配备一无水乙醇容器,在对应于该无水乙醇容器的下部出液口的位置配设一根无水乙醇下引管,在该无水乙醇下引管的管路上串接一用于控制无水乙醇的流量的针阀；再将无水乙醇下引管的末端的出液口引至焊接电极的上电极尖部或钼舟焊接部位,并通过对针阀进行调节,控制出液口将无水乙醇引至所述上电极尖部或钼舟焊接部位的量；最后在钼舟与钼杆焊接时,开启针阀并使针阀的开启度达到所调节的程度,出自出液口的无水乙醇滴至上电极并抵达钼舟或者直接滴至钼舟,使钼舟上的无水乙醇与焊点接触而吸取焊接产生的余热并隔离空气而防止氧化。提高卤素灯灯丝配光性能。(A method for improving the light distribution performance of a halogen lamp filament for a vehicle is characterized in that an absolute ethyl alcohol container is arranged at a position corresponding to the upper part of a welding station, an absolute ethyl alcohol lower guide pipe is arranged at a position corresponding to a liquid outlet at the lower part of the absolute ethyl alcohol container, and a needle valve for controlling the flow of absolute ethyl alcohol is connected on a pipeline of the absolute ethyl alcohol lower guide pipe in series; then leading a liquid outlet at the tail end of the absolute ethyl alcohol lower guide pipe to the tip of an upper electrode of the welding electrode or the welding part of the molybdenum boat, and controlling the amount of leading the absolute ethyl alcohol to the tip of the upper electrode or the welding part of the molybdenum boat by regulating a needle valve; and finally, when the molybdenum boat is welded with the molybdenum rod, opening the needle valve, enabling the opening degree of the needle valve to reach the adjusted degree, and enabling the absolute ethyl alcohol from the liquid outlet to drop to the upper electrode and reach the molybdenum boat or directly drop to the molybdenum boat, so that the absolute ethyl alcohol on the molybdenum boat is in contact with the welding spot to absorb the waste heat generated by welding and isolate air to prevent oxidation. The light distribution performance of the halogen lamp filament is improved.)

1. A method for improving the light distribution performance of a halogen lamp filament for a vehicle is characterized in that an absolute ethyl alcohol container is arranged at a position corresponding to the upper part of a welding station, an absolute ethyl alcohol lower guide pipe is arranged at a position corresponding to a lower liquid outlet of the absolute ethyl alcohol container, and a needle valve for controlling the flow of the absolute ethyl alcohol is connected in series with a pipeline of the absolute ethyl alcohol lower guide pipe; then leading a liquid outlet at the tail end of the absolute ethyl alcohol lower guide pipe to the tip of an upper electrode of a welding electrode or the welding part of a molybdenum boat, and controlling the amount of leading the absolute ethyl alcohol to the tip of the upper electrode or the welding part of the molybdenum boat by controlling a needle valve; and finally, when the molybdenum boat is welded with the molybdenum rod, opening the needle valve, enabling the opening degree of the needle valve to reach the adjusted degree, and enabling the absolute ethyl alcohol from the liquid outlet to drip to the upper electrode and reach the molybdenum boat or directly drip to the molybdenum boat, so that the absolute ethyl alcohol on the molybdenum boat is in contact with a welding spot to absorb waste heat generated by welding and isolate air to prevent oxidation.

2. The method for improving the light distribution performance of the halogen lamp filament for the vehicle as claimed in claim 1, wherein the position of the absolute ethyl alcohol container above the welding station is a position 1 m above the welding station.

3. The method according to claim 1, wherein the controlling of the liquid outlet to introduce absolute ethyl alcohol to the tip of the upper electrode or the position of the welding portion of the molybdenum boat means controlling the amount of absolute ethyl alcohol from the liquid outlet to a single drop per welding cycle.

4. The method for improving the light distribution performance of the halogen lamp filament for the vehicle as claimed in claim 1, wherein when the molybdenum boat and the molybdenum rod are welded by an automated mechanical welding method, an absolute ethyl alcohol supply control device for supplying absolute ethyl alcohol to the absolute ethyl alcohol container is electrically connected with an electrical control system of an automatic production line of the halogen lamp for the vehicle.

5. The method for improving the light distribution performance of the halogen lamp filament for the vehicle as claimed in claim 1, wherein when the welding manner of welding the molybdenum boat and the molybdenum rod is manual welding, the absolute ethyl alcohol is manually supplemented into the absolute ethyl alcohol container.

6. The method for improving the light distribution performance of the halogen lamp filament for the vehicle as claimed in claim 1, wherein the inner diameter of the absolute ethyl alcohol down tube is 1-5 mm.

7. The method for improving the light distribution performance of the halogen lamp filament for the vehicle as claimed in claim 1 or 6, wherein the absolute ethyl alcohol down-lead is a metal tube or a plastic tube.

8. The method for improving the light distribution performance of the halogen lamp filament for the vehicle as claimed in claim 3, wherein the amount of the one drop is 0.04-0.05 ml.

Technical Field

The invention belongs to the technical field of automobile light source part manufacturing, and particularly relates to a method for improving light distribution performance of a halogen lamp filament for an automobile.

Background

The method for improving the light distribution performance of the halogen lamp filament for the vehicle is a method for substantially preventing the welding deformation of the molybdenum boat. The aforementioned halogen lamps for vehicles can be found in published chinese patent documents, such as CN100538995C (metal halogen lamp), CN101103436A (halogen lamp), CN101142654A (halogen lamp), CN101578685A (halogen incandescent lamp), CN203192768U (high performance long life halogen vehicle lamp), CN102792418B (halogen lamp for vehicle headlamp), CN101447393B (halogen lamp and manufacturing method thereof), CN102082066B (C-class halogen lamp), CN203192765U (anti-shock halogen vehicle lamp), CN103413753A (single end halogen lamp with support frame positioning hook), CN203744082U (halogen lamp for vehicle), CN204537986U (halogen lamp for vehicle), CN207082510U (halogen lamp for vehicle), CN207338301U (halogen lamp for vehicle), and CN207074643U (long life halogen lamp), and so on. Also found in foreign patent documents are, for example, US6536918B1, US20030102808A1, US4078188A, JP 50-65082A, WO2006/097058, WO2005/088675, etc.

As known in the art, in order to ensure the versatility of the halogen lamp for vehicles, the standards such as GB15766.1-2008 and ECE R37 have clear technical index requirements for the external dimensions, the position dimensions of the filament, and various parameters of the bulb, such as electrical parameters, etc., and for the bulb manufacturers of halogen lamps for vehicles, as long as the bulb of the halogen lamp meets the requirements of the aforementioned standards, the product is qualified, and vice versa. However, in a typical H4 lamp (i.e., an automotive headlamp), the melting point of molybdenum is 2620 ℃, the temperature of the workpiece to be welded must be higher than the melting point when the molybdenum boat and the molybdenum rod are welded, and the deformation of the molybdenum boat may occur due to a force acting on the workpiece by the resistance welding process. The molybdenum boat is well known in function, and can be used in a halogen tungsten bulb as a shielding piece of inclined light of a vehicle headlamp, and the molybdenum boat can prevent dazzling by blocking upward reflected light beams of a light distribution lens. The process requirements during the fabrication are extremely stringent due to the reflective effect of the molybdenum boat, such as the requirement that its surface be as smooth as possible, the avoidance of gaps between the outer walls of the molybdenum boat, and the avoidance of deformation and oxidation during the welding of the molybdenum boat to the molybdenum rod.

The following technical problems have long been troubling in the industry: the produced halogen lamp product for the vehicle obviously meets the national standard requirement of GB15766.1 and the European standard requirement of ECE R37, but when the halogen lamp product reaches a lamp factory or a whole vehicle factory and is used for light distribution of the bulb of H4, the requirement of GB4599 standard cannot be met, most typically, the III area of the light distribution test is unqualified, and the unqualified III area can cause the vehicle to generate glare to the opposite vehicle in the driving process, so that the driving safety of the opposite vehicle in the meeting process is influenced. The analysis of the reasons and the consensus that the reasons are achieved are as follows: firstly, when the molybdenum boat and the molybdenum rod are welded, the molybdenum boat is slightly deformed; secondly, the molybdenum boat and the molybdenum rod are seriously deformed when being welded, so that the molybdenum boat is perforated to leak light, and the light of the filament is reflected to the III area or transmitted to the III area. Therefore, as long as the aforementioned problem of welding deformation is not solved, the factor that the light distribution test fails in the region iii cannot be eliminated.

As is also known in the art, when welding a molybdenum boat to a molybdenum rod, the welding temperature needs to be above the melting point of molybdenum, due to the high welding temperature; the welded parts will be oxidized to different degrees. The welding under the protection of nitrogen or the mixed gas of nitrogen and hydrogen as the protective gas can prevent the weld spot from being oxidized and causing the deformation of the molybdenum boat to a certain extent, but the heat capacity of the nitrogen or the mixed gas of nitrogen and hydrogen cannot rapidly reduce the temperature of the weld spot, namely the weld spot, at the moment of finishing the welding, so that the deformation factor of the molybdenum boat when being welded with the molybdenum rod cannot be effectively eliminated. The technical solutions described below have been created in this context.

Disclosure of Invention

The invention aims to provide a method for improving the light distribution performance of a halogen lamp filament for a vehicle, which can effectively avoid the deformation of a molybdenum boat when the molybdenum boat is welded with a molybdenum rod and simultaneously prevent the oxidation of a welding wire so as to meet the standard requirement of the light distribution performance when a lamp factory or a whole vehicle factory distributes light.

The task of the invention is accomplished in this way, a method for improving the light distribution performance of a halogen lamp filament for a vehicle, which is characterized in that an absolute ethyl alcohol container is firstly arranged at a position corresponding to the upper part of a welding station, an absolute ethyl alcohol down lead pipe is arranged at a position corresponding to a lower liquid outlet of the absolute ethyl alcohol container, and a needle valve for controlling the flow of the absolute ethyl alcohol is connected in series with a pipeline of the absolute ethyl alcohol down lead pipe; then leading a liquid outlet at the tail end of the absolute ethyl alcohol lower guide pipe to the tip of an upper electrode of a welding electrode or the welding part of a molybdenum boat, and controlling the amount of leading the absolute ethyl alcohol to the tip of the upper electrode or the welding part of the molybdenum boat by controlling a needle valve; and finally, when the molybdenum boat is welded with the molybdenum rod, opening the needle valve, enabling the opening degree of the needle valve to reach the adjusted degree, and enabling the absolute ethyl alcohol from the liquid outlet to drip to the upper electrode and reach the molybdenum boat or directly drip to the molybdenum boat, so that the absolute ethyl alcohol on the molybdenum boat is in contact with a welding spot to absorb waste heat generated by welding and isolate air to prevent oxidation.

In a specific embodiment of the present invention, the position of the absolute ethyl alcohol container above the welding station is a position 1 m above the welding station.

In another specific embodiment of the present invention, the controlling the liquid outlet to introduce the absolute ethyl alcohol to the position of the tip of the upper electrode or the welding position of the molybdenum boat means controlling the amount of the absolute ethyl alcohol from the liquid outlet to be one drop in a welding cycle.

In another embodiment of the invention, when the welding mode of welding the molybdenum boat and the molybdenum rod is automatic mechanical welding, the absolute ethyl alcohol supply control device for supplying absolute ethyl alcohol to the absolute ethyl alcohol container is electrically connected with an electrical control system of the automatic production line of the halogen lamp for the vehicle.

In another embodiment of the present invention, when the molybdenum boat and the molybdenum rod are welded by hand, the absolute ethyl alcohol container is supplemented with absolute ethyl alcohol by hand.

In still another embodiment of the present invention, the inner diameter of the absolute ethyl alcohol downcomer is 1-5 mm.

In a more specific embodiment of the present invention, the absolute ethyl alcohol down pipe is a metal pipe or a plastic pipe.

In yet another specific embodiment of the invention, the amount of said one drop is 0.04-0.05 ml.

The technical scheme provided by the invention has the technical effects that: the absolute ethyl alcohol can be dropped to the molybdenum boat of the workpiece to be welded during welding, so that a large amount of gas can be generated to absorb welding waste heat when the absolute ethyl alcohol is heated, decomposed or gasified during welding, on one hand, air is isolated to prevent oxidation, on the other hand, heat generated during welding can be taken away instantly, deformation and oxidation of the molybdenum boat during welding can be effectively prevented, standard requirements are met during light distribution of lamps or vehicle manufacturers, and the purpose of improving the light distribution performance of halogen lamp filaments is achieved.

Detailed Description

Example 1:

the method for improving the light distribution performance of the halogen lamp filament for the vehicle comprises the following steps: firstly, a container (such as an absolute ethyl alcohol barrel, the same shall apply hereinafter) for absolute ethyl alcohol is arranged at a position 1 m above a welding station, namely, a bracket or other equivalent carriers above the welding station is fixed with the container for containing absolute ethyl alcohol, a lower guide tube (also called an absolute ethyl alcohol outlet tube) made of metal or plastic and made of absolute ethyl alcohol is arranged at a position corresponding to a liquid outlet of the absolute ethyl alcohol container, a needle valve for controlling the flow of absolute ethyl alcohol is connected in series with a pipeline of the lower guide tube, and the needle valve belongs to the known technology, so that the applicant does not give any details, and the structure system can refer to the structures of a medical infusion tube, a valve and a needle head; then introducing a liquid outlet at the tail end of the absolute ethyl alcohol lower guide pipe to the tip part of the upper electrode of the welding electrode, and controlling the amount of the absolute ethyl alcohol introduced to the tip part of the upper electrode by the liquid outlet through regulating a needle valve; finally, when the molybdenum boat and the molybdenum rod are welded, the needle valve is opened and the opening degree of the needle valve is adjusted, the adjusted degree is that the quantity of the absolute ethyl alcohol led to the tip of the upper electrode by the liquid outlet is controlled to be one drop (one drop for each molybdenum boat welded) at a welding beat, the quantity of the one drop of the absolute ethyl alcohol is 0.04-0.05ml, because the welding mode of the embodiment adopts an automatic mechanical welding mode to weld the molybdenum boat and the molybdenum rod, an absolute ethyl alcohol supply control device for supplying the absolute ethyl alcohol to an absolute ethyl alcohol container is electrically connected with an electric control system of an automatic production line of the halogen lamp for the vehicle, the absolute ethyl alcohol from the liquid outlet reaches the molybdenum boat through the tip of the upper electrode, so that an absolute ethyl alcohol welding point on the molybdenum boat is contacted with the molybdenum rod to absorb heat (namely waste heat) generated by welding and isolate air to prevent oxidation, and the molybdenum boat is prevented from being deformed when being welded with the molybdenum rod, in this embodiment, the inner diameter of the absolute ethanol down pipe is preferably 1 to 5mm, preferably 2 to 4mm, more preferably 3mm, and 3mm is selected in this embodiment.

Preferably, a needle-shaped tube with the aperture of 0.2-0.5mm can be connected at the outlet of the absolute ethyl alcohol downward leading tube so as to accurately control the amount of the absolute ethyl alcohol. Because the quantity is too large, the temperature is too fast, so that welding is unstable, and the welding is possibly ignited and burnt, the quantity is too small, the heat preservation and temperature reduction effects are not good, and the two factors are balanced, the invention selects one beat per welding, and controls the quantity of one drop of absolute ethyl alcohol to be 0.04-0.05 ml.

Example 2:

the liquid outlet at the end of the absolute ethyl alcohol lower lead pipe is led to the welding part of the molybdenum boat, and the absolute ethyl alcohol from the liquid outlet is led to the molybdenum boat, that is, the absolute ethyl alcohol is directly dripped to the molybdenum boat through the liquid outlet, because the embodiment is non-automatic manual welding, that is, the molybdenum boat and the molybdenum rod are welded by hand, the absolute ethyl alcohol can be supplemented into the absolute ethyl alcohol container by hand according to the requirement, and the rest is the same as the description of the embodiment 1.

In conclusion, the technical scheme provided by the invention overcomes the defects in the prior art, successfully completes the invention task and truly realizes the technical effects of the applicant in the technical effect column.