GB1471080A - Electron beam deflecting apparatus - Google Patents
Electron beam deflecting apparatusInfo
- Publication number
- GB1471080A GB1471080A GB3816374A GB3816374A GB1471080A GB 1471080 A GB1471080 A GB 1471080A GB 3816374 A GB3816374 A GB 3816374A GB 3816374 A GB3816374 A GB 3816374A GB 1471080 A GB1471080 A GB 1471080A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pair
- coils
- current
- circuit
- weld
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000010894 electron beam technology Methods 0.000 title abstract 2
- 238000003466 welding Methods 0.000 abstract 2
- 244000019194 Sorbus aucuparia Species 0.000 abstract 1
- 235000009790 Sorbus aucuparia Nutrition 0.000 abstract 1
- 239000004020 conductor Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 230000005294 ferromagnetic effect Effects 0.000 abstract 1
- 230000004927 fusion Effects 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract 1
- 239000013643 reference control Substances 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 125000006850 spacer group Chemical group 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/30—Electron-beam or ion-beam tubes for localised treatment of objects
- H01J37/304—Controlling tubes by information coming from the objects or from the beam, e.g. correction signals
-
- 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
- B23K15/00—Electron-beam welding or cutting
- B23K15/004—Tandem beams or torches, i.e. working simultaneously with several beams or torches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/02—Details
- H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement or ion-optical arrangement
- H01J37/147—Arrangements for directing or deflecting the discharge along a desired path
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
Abstract
1471080 Welding by fusion BRITISH AIRCRAFT CORP Ltd 18 Aug 1975 [31 Aug 1974] 38163/74 Heading B3R [Also in Divisions G3 and H1] Electron beam apparatus (e.g. welding apparatus) comprises a ferromagnetic yoke having opposed poles 7, 8 on opposite sides of the beam and a pair of deflection coils on each pole, one coil of each pair, (e.g. coils (11a), (12a), Fig. 2, not shown) being connected in a series circuit and in a sense such that the voltage induced in one pair of coils by a collapsing deflection current in the other pair assists the rising deflection current in the first pair. The apparatus ensures sufficiently quick beam switching between two weld runs 3, 4 that the two advancing weld pools are maintained, and is achieved by the Fig. 3 circuit (not shown) including square wave generator (20), "divide by two" circuit (21), and combined buffer amplifier and reference control circuit (22). Power amplifiers (25), (26) operate in the constant current mode. Programmable variable voltage circuit (27) provides for divergent or convergent welds. The yoke may be two part toroidal cores (30), (31), Fig. 4 (not shown), with bifilar coils (34), (35). In either construction the coils may be formed from a twisted pair of Litz conductors. Sensing device (10) (Fig. 5, not shown) produces a signal proportional to the beam current which via comparator circuitry may be used to correct the current (see Division G3). The device (10) comprises a thin walled tube (50), Fig. 6 (not shown) containing a resistive element (not shown) spaced by a glass spacer and connected at one end to the outer end of the tube, and at the other to the outer terminal of coaxial socket (52). Housing (55) may be formed from a solid Al block, is connected by wire (56) to socket (52) and carries PTFE bush (54). Further sensing device (60) ensures automatic focusing, the width of the pulses in each device being compared. The current control and focus control may be combined in one system, two encoded signals being transmitted in multiplex form over a single optical link. Two runs of "stitch" welds, rather than continuous weld, may be obtained by frequency reduction of generator (20).
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3816374A GB1471080A (en) | 1974-08-31 | 1974-08-31 | Electron beam deflecting apparatus |
| US05/605,882 US4042801A (en) | 1974-08-31 | 1975-08-19 | Electron beam apparatus |
| DE19752537981 DE2537981A1 (en) | 1974-08-31 | 1975-08-26 | ELECTRON BEAM DEFLECTOR |
| FR7526641A FR2283546A1 (en) | 1974-08-31 | 1975-08-29 | ELECTRONIC BEAM DEFLECTION DEVICE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3816374A GB1471080A (en) | 1974-08-31 | 1974-08-31 | Electron beam deflecting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1471080A true GB1471080A (en) | 1977-04-21 |
Family
ID=10401655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3816374A Expired GB1471080A (en) | 1974-08-31 | 1974-08-31 | Electron beam deflecting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1471080A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116833537A (en) * | 2023-06-30 | 2023-10-03 | 中国航发南方工业有限公司 | A method for welding high-temperature alloy casing components with large wall thickness differences |
-
1974
- 1974-08-31 GB GB3816374A patent/GB1471080A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116833537A (en) * | 2023-06-30 | 2023-10-03 | 中国航发南方工业有限公司 | A method for welding high-temperature alloy casing components with large wall thickness differences |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |