CN104785925A - Electrode molybdenum sheet assembly for ultrahigh-voltage point light source and forming method thereof - Google Patents
Electrode molybdenum sheet assembly for ultrahigh-voltage point light source and forming method thereof Download PDFInfo
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- CN104785925A CN104785925A CN201410029957.9A CN201410029957A CN104785925A CN 104785925 A CN104785925 A CN 104785925A CN 201410029957 A CN201410029957 A CN 201410029957A CN 104785925 A CN104785925 A CN 104785925A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/22—Spot welding
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- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
The invention relates to an electrode molybdenum sheet assembly for an ultrahigh-voltage point light source and a forming method thereof. The electrode molybdenum sheet assembly is composed of a sealing-in molybdenum sheet, a transmitting electrode and an outgoing line, wherein the transmitting electrode and the outgoing line are welded to the two ends of the sealing-in molybdenum sheet. The sealing-in molybdenum piece is of an arc structure or a peak-shaped structure, the transmitting electrode is composed of a single core rod or a core rod and a spring connected to the front end of the core rod in a sleeving mode. The outgoing line is a molybdenum rod outgoing line, the tail of the outgoing line is of a diamond or hook-shaped structure, and the middle of the outgoing line is of a straight-rod-shaped or wave-shaped structure. One end of the sealing-in molybdenum sheet is provided with a laser electric welding spot connected with the transmitting electrode in a welding mode. Multi-point laser welding is conducted through a laser outgoing head, the transmitting electrode is connected to one end of the sealing-in molybdenum sheet in a welding mode, and the outgoing line is connected to the sealing-in molybdenum sheet in a welding mode and coaxially arranged with the transmitting electrode through the other end of the sealing-in molybdenum sheet in a resistance spot welding mode. Compared with the prior art, the welding quality and consistency are ensured, the bearing strength of the molybdenum sheet is improved and accurately controlled, straightness in the packaging process can also be improved, and accurate positioning is achieved.
Description
Technical field
The present invention relates to a kind of spot light assembly and forming method thereof, especially relate to a kind of super-pressure spot light electrode molybdenum slice assembly and forming method thereof.
Background technology
Super-pressure spot light is a kind of gas-discharge lamp, is filled with mercury and inert gas in lamp, and during work, in lamp, mercury vapour is in super-pressure state.The brightness of super-pressure spot light is comparatively large, is applied in the field such as liquid crystal projection apparatus and searchlight more.
In super-pressure spot light, electrode molybdenum slice assembly is enclosed in the both sides of discharge tube in a gastight manner, and its existing forming technique also exists following defects:
Solder technology aspect between electrode and molybdenum sheet, in existing technology, solder technology between tungsten electrode with molybdenum sheet is mainly traditional electrode resistance and welds, this technology adopts upper and lower tungsten electrode to discharge and welds, be pressed between two electrodes by thick tungsten bar and molybdenum sheet, and imposing electric current, the resistance heat effect utilizing electric current to flow through work piece interface and adjacent domain generation is heated fusing or mecystasis, makes it a kind of method forming corrupt split.Due to the fusing point gap between tungsten material and Mo comparatively large (molybdenum fusing point 2610 degree, tungsten fusing point 3410 degree), traditional electric resistance welding mode cannot make to there is mutual parent's profit between bi-material, the effective state that becomes to dissolve each other cannot be formed, its welding difficulty is larger, product quality after welding is difficult to be guaranteed, easy weldering or rosin joint occurred, there is oxidation in bond pad locations, the uniformity of weld strength is very poor.And this spot welding mode is manual spot welding, inefficiency, single weld interval is long, 1pcs/10s.
Molybdenum sheet bearing strength aspect, in prior art, sealing-in molybdenum sheet is mainly divided into two kinds, and one is smooth shape molybdenum sheet, in discharge tube assembling process, must by vertical for subassembly product placement positioning, electrode is in upper end position, due to electrode own wt, bending easily appears in molybdenum sheet position, cannot support electrode, its linearity requirement can not be met, have impact on subsequent production.Another kind of is bending or arc molybdenum sheet, and the molybdenum sheet of this shape has certain rigidity, and has supporting role, but the degree of arc or bending is not clearly defined, if molybdenum sheet arc or bending degree are too little, the carrying effect of molybdenum sheet can obviously reduce, and cannot play a supporting role to electrode; If molybdenum sheet arc or bending degree are too large, can cause in assembly follow-up press seal process and between glass tube, there is obvious gas line, making cannot combine closely both it, have a strong impact on press seal assembly quality.
Aspect, lead-out wire location, in prior art, lead-out wire is generally straight rod-shaped design, does not have expliciting the position to support, in the process of encapsulation discharge tube, because lead-out wire is with gap excessive between quartz ampoule, be difficult to keep assembly with the coaxial state of quartz ampoule, cause electrode space deflection, pole span produces obvious deviation, the luminous mass of its discharge lamp is reduced, greatly shortens its service life.
Summary of the invention
Object of the present invention be exactly in order to overcome above-mentioned prior art exist defect and a kind of super-pressure spot light electrode molybdenum slice assembly and forming method thereof are provided, solve the problem of original weld strength difference on the one hand, by controlling laser energy and welding is counted and position, ensure that welding quality and uniformity, improve again the bearing strength also accurately controlling molybdenum sheet on the other hand, ensure that the uniformity of assembling, the collimation in encapsulation process can also be improved, accomplish accurate location.
Object of the present invention can be achieved through the following technical solutions:
A kind of super-pressure spot light electrode molybdenum slice assembly, is made up of sealing-in molybdenum sheet, the emission electrode being welded on sealing-in molybdenum sheet two ends and lead-out wire,
Described sealing-in molybdenum sheet is arcuate structure or mountain peak shape structure, and one end of sealing-in molybdenum sheet arranges the laser electrical pads being welded to connect emission electrode,
Described emission electrode is made up of single plug or plug and the sheathed spring being connected to plug front end,
Described lead-out wire is molybdenum rod lead-out wire, and afterbody is rhombus or hooked shape structure, and middle part is straight-bar or wavy shaped configuration.
The peak with heading part of described plug front end is club shaped structure, circle head-like structure or bullet-shaped structure routinely.
The radian of the sealing-in molybdenum sheet of arcuate structure is 1.2-2.8rad.
The sealing-in molybdenum sheet of mountain peak shape structure is unimodal or multi-peaks structure, and going out peak angle is 80-160 °.Going out peak heights is 0.1-0.75mm.
The super-pressure spot light forming method of electrode molybdenum slice assembly, utilizes laser emitting head to carry out multiple spot laser weld, is welded to connect by emission electrode in one end of sealing-in molybdenum sheet, solder joint is the distribution of line shape, welding energy stable and uniform, heat-affected zone is little, and welding efficiency is high.
Described laser emitting head is moveable outgoing head, and translational speed is 1-10mm/s.
The laser energy of described laser emitting head is 3-10J.
The welding efficiency of described laser emitting head is 1pcs/3s.
The super-pressure spot light forming method of electrode slice assembly, lead-out wire uses resistance spot welding mode to be connected to the other end of sealing-in molybdenum sheet and coaxial with emission electrode.
Described sealing-in molybdenum sheet passes through the matched moulds process of upper male mould and lower cavity die, and mould power output controls to make at 6-12kgf the sealing-in molybdenum sheet obtaining arcuate structure or mountain peak shape structure, and compacting guarantees that the molybdenum sheet both sides edge of a knife is not damaged, increases the rigidity of molybdenum sheet.To the control of arc radian and mountain peak shape angle height, accurately can control the bearing capacity of molybdenum sheet, make molybdenum sheet keep optimized balance in carrying and in assembling.
Compared with prior art, the present invention has the following advantages:
(1) solder technology aspect: electrode and molybdenum sheet are multiple spot laser weld, by controlling laser energy and bond pad locations and quantity, making welding energy be uniformly distributed, avoiding weldering or rosin joint, ensure that quality and the fastness of spot welding.
(2) molybdenum sheet bearing strength aspect: the arc of employing or mountain peak shape structure, add the rigidity of molybdenum sheet self, improve the bearing strength of molybdenum sheet, prevents from cannot being supported because molybdenum sheet bends the electrode caused, ensure that the linearity of component assembling.And explicitly calling for radian and peak angle height, more accurately can control the bearing capacity of molybdenum sheet, make molybdenum sheet keep optimized balance in carrying and in assembling.In addition, while guaranteeing bearing strength, according to the size of the weight of electrode and molybdenum sheet, molybdenum sheet peak shape can be adjusted.If electrode is heavier, molybdenum sheet can be designed to bimodal or three peak shapes, if electrode is comparatively light, molybdenum sheet can be designed to unimodal shape, flexible and changeable.
(3) aspect, lead-out wire location: lead-out wire end is rhombus or curved hook-shape structure, and middle part can use wavy shaped configuration according to actual product situation.The rhombus of afterbody or curved hook-shape structure mainly play positioning and guiding effect in assembling process, electrode can be made to accomplish quick position, guarantee its exact position in the discharge vessel, ensure that light center does not offset, its height dimension should match with the glass tube internal diameter of reality, and required precision controls at 0.1mm, if rhombus or crotch shape height dimension too small, make excesssive gap between lead-out wire and glass tube, both cannot keep coaxial state, cause electrode offset; If height dimension is excessive, then assembly can be caused cannot to assemble with glass tube.Therefore need accurately to control precision.In addition, if length component is longer, point surface contact structure only by afterbody cannot the collimation requirement of termination electrode before Assurance component, consider to add wavy shaped configuration in lead-out wire stage casing, this waveform height dimension is slightly less than glass tube internal diameter, and precision controlling is at 0.05mm, strengthen its guidance quality, make it more reliable and stable.
Accompanying drawing explanation
Fig. 1 is main TV structure schematic diagram of the present invention in embodiment 1;
Fig. 2 is plan structure schematic diagram of the present invention in embodiment 1.
Fig. 3 is the structural representation of the emission electrode used in embodiment 2;
Fig. 4 is the plan structure schematic diagram of the sealing-in molybdenum sheet used in embodiment 2;
Fig. 5 is the side-looking structural representation of the sealing-in molybdenum sheet used in embodiment 2;
Fig. 6 is the structural representation of the lead-out wire used in embodiment 2;
Fig. 7 is the structural representation of the emission electrode used in embodiment 3;
Fig. 8 is the structural representation of the lead-out wire used in embodiment 3;
Fig. 9 is the structural representation of the emission electrode used in embodiment 4;
Figure 10 is the structural representation of the sealing-in molybdenum sheet used in embodiment 4;
Figure 11 is the structural representation of the emission electrode used in embodiment 5.
In figure, 1 be emission electrode, 2 be sealing-in molybdenum sheet, 3 for lead-out wire, laser electrical pads 4.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
A kind of spot light electrode molybdenum slice assembly, its structure as shown in Figure 1-2, be made up of emission electrode 1, sealing-in molybdenum sheet 2 and lead-out wire 3, emission electrode 1 is located at foremost, sealing-in molybdenum sheet 2 arranges laser electrical pads 4, emission electrode 1 is welded to connect and is connected with sealing-in molybdenum sheet 2 in laser electrical pads 4, and lead-out wire 3 uses resistance spot welding mode to be connected to the other end of sealing-in molybdenum sheet 2, coaxially arranges with emission electrode 1.In the present embodiment, the spring that emission electrode 1 is set in plug front end by plug and welding forms, and the peak with heading part of plug front end is bullet-shaped structure, and diameter of mandrel is 0.2-0.8mm, and plug length is 5-16mm, and spring string diameter is 0.1-0.4mm.Molybdenum sheet width is 1.2-4mm, and thickness is 0.02-0.04mm.Lead-out wire 3 is molybdenum rod lead-out wire, and afterbody is hooked shape structure, and middle part is straight-bar structure.Lead-out wire 3 is arranged in glass tube, and the diameter of lead-out wire 3 is 0.4-0.7mm, and length is 20-70mm.Height and the glass tube internal diameter of the afterbody of hooked shape structure match, and precision controlling is at 0.1mm.
Super-pressure spot light electrode molybdenum slice assembly is when shaping, laser emitting head is utilized to carry out multiple spot laser weld, emission electrode is welded to connect in one end of sealing-in molybdenum sheet, laser emitting head is moveable outgoing head, translational speed is 1-10mm/s, and the laser energy of laser emitting head is 3-10J, and solder joint is the distribution of line shape, welding energy stable and uniform, welding efficiency is high.
Super-pressure spot light electrode molybdenum slice assembly is when shaping, and lead-out wire uses resistance spot welding mode be welded to connect the other end at sealing-in molybdenum sheet and coaxially arrange with emission electrode,
Sealing-in molybdenum sheet passes through the matched moulds process of upper male mould and lower cavity die, and mould power output controls to make at 6-12kgf the sealing-in molybdenum sheet obtaining arcuate structure or mountain peak shape structure, and compacting guarantees that the molybdenum sheet both sides edge of a knife is not damaged, increases the rigidity of molybdenum sheet.To the control of arc radian and peak shape angle height, accurately can control the bearing capacity of molybdenum sheet, make molybdenum sheet keep optimized balance in carrying and in assembling.
Utilize the assembly that laser spot welding of the present invention is shaping, its advantage is as follows:
Embodiment 2
A kind of spot light electrode molybdenum slice assembly, by emission electrode 1, sealing-in molybdenum sheet 2 and lead-out wire 3 form, connected mode is substantially the same manner as Example 1, difference is, the structure of emission electrode 1 as shown in Figure 3, the spring being set in plug front end by plug and welding forms, the peak with heading part of plug front end is circle head-like structure, the structure of sealing-in molybdenum sheet 2 as illustrated in figures 4-5, for convex structure, radian controls at 1.2-2.8rad, the present embodiment controls at 2rad, the structure of lead-out wire 3 as shown in Figure 6, afterbody is diamond structure, middle part is wavy shaped configuration, the height of middle wavy shaped configuration is slightly less than glass tube internal diameter, precision controlling is at 0.05mm.
Embodiment 3
A kind of spot light electrode molybdenum slice assembly, be made up of emission electrode 1, sealing-in molybdenum sheet and lead-out wire 3, connected mode is substantially the same manner as Example 1, difference is, the structure of emission electrode 1 as shown in Figure 7, is made up of single plug, and the structure of lead-out wire 3 as shown in Figure 8, afterbody is hooked shape structure, and middle part is straight-bar structure.
Embodiment 4
A kind of spot light electrode molybdenum slice assembly, be made up of emission electrode 1, sealing-in molybdenum sheet 2 and lead-out wire, connected mode is substantially the same manner as Example 1, difference is, the structure of emission electrode 1 as shown in Figure 9, be made up of single plug, the peak with heading part of the front end of plug 1 is spherical shape, the structure of sealing-in molybdenum sheet 2 as shown in Figure 10, adopt mountain peak shape structure, can be set to unimodal or multimodal shape according to the size of the weight of electrode and molybdenum sheet, peak Angle ambiguity is at 80 °-160 °, peak heights controls at 0.1-0.75mm, and what the present embodiment adopted is bimodal shape structure.
The sealing-in molybdenum sheet of the circular arc that the present invention adopts or mountain peak shape has the following advantages:
Embodiment 5
A kind of spot light electrode molybdenum slice assembly, be made up of emission electrode 1, sealing-in molybdenum sheet 2 and lead-out wire, connected mode is substantially the same manner as Example 4, and difference is, the structure of emission electrode 1 as shown in figure 11, the spring being set in plug front end by plug and welding forms, the peak with heading part of plug front end is the bar-shaped of routine, and the structure of sealing-in molybdenum sheet 2 adopts mountain peak shape structure, and peak Angle ambiguity is at 80 °-160 °, peak heights controls at 0.1-0.75mm, and what the present embodiment adopted is unimodal shape structure.
Claims (10)
1. a super-pressure spot light electrode molybdenum slice assembly, is characterized in that, this assembly is made up of sealing-in molybdenum sheet, the emission electrode being welded on sealing-in molybdenum sheet two ends and lead-out wire,
Described sealing-in molybdenum sheet is arcuate structure or mountain peak shape structure, and one end of sealing-in molybdenum sheet arranges the laser electrical pads being welded to connect emission electrode,
Described emission electrode is made up of single plug or plug and the sheathed spring being connected to plug front end,
Described lead-out wire is molybdenum rod lead-out wire, and afterbody is rhombus or hooked shape structure, and middle part is straight-bar or wavy shaped configuration.
2. a kind of super-pressure spot light electrode molybdenum slice assembly according to claim 1, is characterized in that, the peak with heading part of described plug front end is club shaped structure, circle head-like structure or bullet-shaped structure routinely.
3. a kind of super-pressure spot light electrode molybdenum slice assembly according to claim 1, it is characterized in that, the radian of the sealing-in molybdenum sheet of arcuate structure is 1.2-2.8rad.
4. a kind of super-pressure spot light electrode molybdenum slice assembly according to claim 1, it is characterized in that, the sealing-in molybdenum sheet of mountain peak shape structure is unimodal or multi-peaks structure, and going out peak angle is 80-160 °, and going out peak heights is 0.1-0.75mm.
5. the forming method of electrode molybdenum slice assembly of the super-pressure spot light according to any one of claim 1-4, it is characterized in that, the method utilizes laser emitting head to carry out multiple spot laser weld, emission electrode is welded to connect in one end of sealing-in molybdenum sheet, and lead-out wire uses resistance spot welding mode be welded to connect the other end at sealing-in molybdenum sheet and coaxially arrange with emission electrode.
6. the forming method of a kind of super-pressure spot light electrode molybdenum slice assembly according to claim 5, it is characterized in that, described laser emitting head is moveable outgoing head, and translational speed is 1-10mm/s.
7. the forming method of a kind of super-pressure spot light electrode molybdenum slice assembly according to claim 5, it is characterized in that, the laser energy of described laser emitting head is 3-10J.
8. the forming method of a kind of super-pressure spot light electrode molybdenum slice assembly according to claim 5, it is characterized in that, the welding efficiency of described laser emitting head is 1pcs/3s.
9. the forming method of a kind of super-pressure spot light electrode molybdenum slice assembly according to claim 5, it is characterized in that, described sealing-in molybdenum sheet passes through the matched moulds process of upper male mould and lower cavity die, make the sealing-in molybdenum sheet obtaining arcuate structure or mountain peak shape structure, compacting guarantees that the molybdenum sheet both sides edge of a knife is not damaged.
10. the forming method of a kind of super-pressure spot light electrode molybdenum slice assembly according to claim 9, it is characterized in that, the mould power output of described upper male mould and lower cavity die controls at 6-12kgf.
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| CN201410029957.9A CN104785925A (en) | 2014-01-22 | 2014-01-22 | Electrode molybdenum sheet assembly for ultrahigh-voltage point light source and forming method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114571075A (en) * | 2022-03-17 | 2022-06-03 | 中国工程物理研究院核物理与化学研究所 | Welding method for miniature fission chamber signal outgoing line |
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