CN104253014A - Manufacturing method of halogen tungsten lamp - Google Patents

Abstract

The invention provides a manufacturing method of a halogen tungsten lamp, and belongs to the technical field of illumination lamp manufacturing. The manufacturing method of the halogen tungsten lamp adopts the following technical scheme that the manufacturing method comprises the steps of (1) winding a tungsten filament on a bracket and feeding the tungsten filament into a hydrogen oven for heating, (2) mutually connecting metal devices in the lamp and connecting an exhaust tube in an inner tube, (3) sealing a lamp tube and additionally forming an explosion-proof groove, and (4) removing residual gas in the lamp tube, then filling working gas into the lamp tube and finally cutting off the exhaust tube for gas tightness sealing. Special working gas is filled into the halogen tungsten lamp, tungsten on the lamp filament cannot gradually volatilize by halogen tungsten circulation, and the halogen tungsten lamp cannot be blackened due to tungsten deposition on a bulb housing, so that the service life of the halogen tungsten lamp is greatly prolonged.

Description

The manufacture method of tungsten halogen lamp

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Technical field

The invention belongs to lighting manufacture technology field, particularly relate to a kind of manufacture method of tungsten halogen lamp.

Background technology

The basic principle of luminosity of tungsten halogen lamp is identical with incandescent lamp, is all heat radiation light source.Different places is to be filled with special working gas inside tungsten halogen lamp, and its composition is the gaseous mixture (methylene bromide and Krypton) of 95% and the High Purity Nitrogen of 5%, and these gases establish Halogen tungsten cycle in bulb.Detailed process is after the tungsten in filament evaporates, and towards temperature lower ground just movement, then can combine at tube wall place and Br and generate WBr2; And at temperature higher position, WBr2 can decompose again, the W of generation can get back on filament, and Br gets back in working gas, the process of Here it is whole Halogen tungsten cycle.By such Halogen tungsten cycle, the tungsten on filament can not volatilize gradually, and also can not turn black because tungsten deposits on bulb housing, its life-span is extended greatly.

Summary of the invention

The invention provides a kind of manufacture method of tungsten halogen lamp, object of the present invention is realized by following technical proposals:

(1) on support around on tungsten filament, send in the baking box being full of hydrogen and heat;

(2) metal device in lamp is interconnected, in interior pipe, connects blast pipe;

(3) fluorescent tube is sealed up, add anti-explosion groove;

(4) residual gas inside fluorescent tube is removed, and then be filled with working gas inside, finally cut away blast pipe, carry out Leakless sealing.

Embodiment

Below by specific embodiment, the present invention is further illustrated.

The main material producing tungsten halogen lamp has:

1, quartz ampoule (Quartz), mainly for the manufacture of cell-shell.Its main feature is that thermal coefficient of expansion is little, high temperature resistant, good insulating, and saturating radiation is strong;

2, tungsten (W), is mainly used in filament;

3, molybdenum (Mo), is mainly used in the sealing-in of same glass.Why adopt Mo, be because the ductility of molybdenum is fine, very thin paillon foil can be pressed into, with the same glass sealing of this paillon foil.Because metal is when very thin, shrinkage weakens greatly, and therefore can have good sealing-in effect with glass, guarantee can not be leaked gas.

The production procedure of tungsten halogen lamp, mainly contains following a few procedure:

Around support (Winding),---------> takes over (Tabulating), and---> flattens (Pinching), and---> is vented (Pumping), and------> cuts (Cutting), and---> fills head (Mounting), and---> prints (Marking), and---> packs (Packing) to the bright hydrogen of > (Flashing) in > polishing lighting (Burning)---> examines entirely (Fully inspection)---in > magnetic field sizing (Magnetic) in > spot welding (Welding).

Say the feature of each step below step by step:

1, around support (Winding), be exactly on support around on filament.This step wants Attention question to be the length controlling filament, and position.

2, bright hydrogen (Flashing), this step, the filament just wound can be sent one to and be full of in the machine of the similar baking box of hydrogen environment.

This step mainly contains two effects, and the first, metal heats in a hydrogen atmosphere, can remove the impurity such as the oxide on metal; The second, more importantly, tungsten filament is after heating under hydrogen environment, and its interior atoms arrangement can change.Originally tungsten filament Atomic Arrangement is in threadiness, easy flexural deformation, and in hydrogen after heating, its atom can form more stable lattice structure, allows tungsten filament can not sagging deflections in Long-Time Service.

3, spot welding (Welding), by spot welding, is interconnected the metal device in lamp.Affect spot welding because have: (1) current density; (2) clean on weldment surface; (3) wlding character.

4, take over (Tabulating), result connects blast pipe exactly in interior pipe, uses for being vented and filling working gas.Taking over most important is exactly air-tightness, generally detects using conventional procedures, hunt leak and sparkover will be adopted to hunt leak.

5, flatten (Pinching), be exactly machine envelope, fluorescent tube is sealed up, later fluorescent tube and extraneous contact just only have blast pipe.Fluorescent tube scorification is sealed by machine envelope employing machine envelope car duration and degree of heating, whole process need Attention question have air-tightness, length with being identical of luminescence center, seal shape just and round and smooth, internal components is not damaged, correct compression resistance be without residual stress, finally will add anti-explosion groove.

Here say anti-explosion groove, if the filament of tungsten halogen lamp disconnects, can produce arc discharge between the ports, temperature is very high, and setting off an explosion, it is dangerous to produce.Anti-explosion groove is exactly to prevent this danger, adds the wire of similar fuse at the two ends of lamp, if electric current is excessive, fuse can fuse automatically, prevents filament blow.

6, be vented (Pumping), this is a more crucial step, first the residual gas inside fluorescent tube will be removed, and then be filled with working gas inside.The method obtaining vacuum utilizes cooled with liquid nitrogen, and the residual gas in such lamp is all liquefied, and can discharge from blast pipe.Then just can be filled with working gas, finally cut away blast pipe, carry out Leakless sealing.

7, magnetic field sizing (Magnetic), this step is used for manufacturing process that is small-sized or compact tungsten halogen lamp, and its effect is identical with the bright hydrogen of second step (Flashing), is to make filament firmer, can not be sagging.

Operation principle is, filament is put among magnetic field, then connects with the mains, and allow in filament and flow through electric current, the electric current in magnetic field can be subject to the effect of electromagnetic force, and this power just in time offsets with gravity.Under the effect of two power, filament, by positive deterministic type, can not easily be out of shape.

Generally relatively large tungsten halogen lamp adopts bright hydrogen (Flashing) to shape, and less lamp filament of halogen-tungsten adopts magnetic field sizing.

8, (Cutting) is cut

9, fill head (Mounting), loading onto lamp holder to fluorescent tube, is exactly the metallic connection parts of fluorescent tube end.

Print (Marking), polishing lighting (Burning), full inspection (Fully inspection), a few step of packaging (Packing) etc. is all common step, slightly.

Claims (1)

1. a manufacture method for tungsten halogen lamp, is characterized in that comprising the following steps:

(1) on support around on tungsten filament, send in the baking box being full of hydrogen and heat;

(2) metal device in lamp is interconnected, in interior pipe, connects blast pipe;

(3) fluorescent tube is sealed up, add anti-explosion groove;

(4) residual gas inside fluorescent tube is removed, and then be filled with working gas inside, finally cut away blast pipe, carry out Leakless sealing.