CN104148862A - Tool fixture for assembling non-intercept grid-controlled electronic gun shadow grid and welding method - Google Patents
Tool fixture for assembling non-intercept grid-controlled electronic gun shadow grid and welding method Download PDFInfo
- Publication number
- CN104148862A CN104148862A CN201410414971.0A CN201410414971A CN104148862A CN 104148862 A CN104148862 A CN 104148862A CN 201410414971 A CN201410414971 A CN 201410414971A CN 104148862 A CN104148862 A CN 104148862A
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- China
- Prior art keywords
- grid
- base
- shadow grid
- briquetting
- negative electrode
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Classifications
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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
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
Abstract
The invention provides a tool fixture for assembling a non-intercept grid-controlled electronic gun shadow grid. The tool fixture for assembling the non-intercept grid-controlled electronic gun shadow grid comprises a base, a pressing block and N bolts, wherein the base is of a hollow cylindrical structure, and the upper surface of the base is axially provided with N base screw holes which are evenly distributed in the circumferential direction; the pressing block is of a hollow cylindrical structure, and a central hole of the pressing block is of a structure with the thin upper portion and the thick lower portion, so that a positioning groove is formed in the lower portion of the pressing block, and the outer side of the positioning groove is provided with M pressing block side holes in the radial direction and N pressing block through holes in the axial direction at the same time; the N bolts extend into the N pressing block through holes in the pressing block and are connected to the N base screw holes in the base in a screwed mode. By means of the tool fixture, it can be guaranteed that the shadow grid and a cathode assembly are welded in a high- quality mode and process steps are reduced, and it can be guaranteed that the shadow grid cannot loosen or fall in the using process as well.
Description
Technical field
The present invention relates to electron trade vacuum electronics technical field, relate in particular to a kind of for frock clamp and welding method without intercepting and capturing the assembling of grided electron gun shadow grid.
Background technology
Pulsed TWT can be realized the microwave output of high-peak power, is widely used in phased array jammer, Towed active decoy, expendable jammer, distributed jammers, spaceborne emitter, UAV system SAR and various satellite system.Grid pulse travelling-wave tubes is as the main Types of pulsed TWT, and maximum advantage is that pulse control voltage is low, and supporting power supply reliability is high.Grid-control mode refers at negative electrode and nearby adds a mesh grid, ends the transmitting of cathode electronics by apply negative DC potential on aperture plate, or applies positive pulse modulation signal and come the transmitting of control cathode electronics.Because the distance of grid and negative electrode is very near, so operating voltage is lower.Grided electron gun comprise single grid and without intercept and capture grided electron gun.In single grate electronic rifle, only has an aperture plate, single aperture plate has electronics to intercept and capture, intercepting and capturing rate is generally 10%-15%, will cause like this aperture plate temperature in the situation that of self thermal source sharply to rise, thereby easily cause grid emission phenomena, therefore limited the raising of dutycycle and the power output of pulsed TWT, its application is only used in the grid pulse travelling-wave tubes of little dutycycle and middle low power.Be mainly used in large work than the pulsed TWT of large power output without intercepting and capturing grided electron gun, claim again without intercepting and capturing grided electron gun (in actual tubulation, electronics is intercepted and captured and preferably can be reached 0.01%).
Between control gate and negative electrode, to add one and the idiostatic shadow grid of negative electrode without intercepting and capturing grided electron gun, the grid silk of shadow grid aligns with the grid silk of control gate, when work just to the negative electrode under shadow grid due to cloudy grid and the idiostatic transmitting of negative electrode suppressed, other electronics near shadow grid are forced through because of shadow grid current potential the junior unit not being blocked, the electric current that control gate is blocked and intercept and capture greatly reduces, and improves the reliability of rifle.
In without intercepting and capturing grided electron gun, for obtaining good laminar electron flow, shadow grid is generally close to cathode surface and is placed, control gate and shadow grid centering are placed, but in the time that travelling-wave tubes is normally worked, negative electrode is because temperature is the highest, the thermal walking of negative electrode is greater than the thermal walking of shadow grid, and make negative electrode acutely push shadow grid, thus make shadow grid produce excessive thermal deformation or damage, thereby between shadow grid and cathode plane, have a very little distance.Desirable state is in the time that travelling-wave tubes is normally worked, and under thermal deformation, shadow grid is close to cathode surface and unnecessary deformation is not occurred.
Without intercepting and capturing, grided electron gun is high to the matching requirements of electron gun, must ensure the structural parameters between shadow grid, control gate, grid head and the first-class key components and parts of anode, otherwise have influence on the focusing of electron beam and the laminarity of electron beam.The concentricity of shadow grid and negative electrode and depth of parallelism shaping and the percent of pass of travelling-wave tubes etc. to electron beam has material impact, must shelve mould and shelve the structural parameters of technique guarantee between them by appropriate, so meet high percent of pass, large work than, without the needs of intercepting and capturing grided electron gun development.
But realizing in process of the present invention, applicant finds that prior art is not high without the assembly precision of intercepting and capturing shadow grid in grided electron gun, the focusing to electron beam and the laminarity of electron beam have a negative impact.
Summary of the invention
(1) technical problem that will solve
In view of above-mentioned technical problem, the invention provides a kind of for frock clamp and welding method without the assembling of intercepting and capturing grided electron gun shadow grid, to improve without the assembly precision of intercepting and capturing shadow grid in grided electron gun.
(2) technical scheme
The invention provides a kind of for the frock clamp without intercepting and capturing the assembling of grided electron gun shadow grid.This comprises without intercepting and capturing grided electron gun shadow grid frock clamp: base 1, be hollow cylindrical structure, cathode tube 52 inserts in the centre bore 11 of these bases, and 51, negative electrode, in the top of base, is offered N the base screw 12 distributing around even circumferential vertically at the upper surface of base 1; Briquetting 2, be hollow cylindrical structure, the diameter on top is less than the diameter of shadow grid, the diameter of the slightly larger in diameter of bottom wider section cylinder on cathode tube, thereby detent 21 is formed at the bottom at briquetting 2 centre bores, and the degree of depth of this detent (21) is less than the height of wider section cylinder on cathode tube, M briquetting side opening 24 radially offered in the outside of this detent 21, offers vertically N briquetting through hole 23 simultaneously; N screw 3, it is stretched into by the N on briquetting briquetting through hole 23 respectively, is bolted in N base screw 12 of base, make the top of detent 21 be pressed in the outer ledge of shadow grid 4, shadow grid 4 is pressed on to the top of negative electrode 51, the centre bore of briquetting forms observation window, wherein, N >=2, M >=2.
(3) beneficial effect
Can find out from technique scheme, the present invention is for ensureing to weld in high quality shadow grid and cathode assembly without frock clamp and the welding method of intercepting and capturing the assembling of grided electron gun shadow grid, when reducing process, can also ensure that in use procedure, shadow grid can not become flexible, come off.
Brief description of the drawings
Fig. 1 is for the structural representation after assembling with shadow grid, cathode assembly without the frock clamp of intercepting and capturing grided electron gun shadow grid laser weld according to the embodiment of the present invention;
Fig. 2 is the cutaway view of base in frock clamp shown in Fig. 1;
Fig. 3 is the top view of base in frock clamp shown in Fig. 1;
Fig. 4 is the top view of briquetting in frock clamp shown in Fig. 1;
Fig. 5 is the side view of briquetting in frock clamp shown in Fig. 1;
Fig. 6 is the cutaway view of briquetting in frock clamp shown in Fig. 1.
[main element]
1-base;
11-centre hole of base; 12-base screw;
2-briquetting;
21-briquetting detent; 22-briquetting centre bore;
23-briquetting through hole; 24-briquetting side opening;
3-screw;
4-shadow grid;
5-cathode assembly;
51-negative electrode; 52-cathode tube.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.It should be noted that, in accompanying drawing or description description, similar or identical part is all used identical figure number.The implementation that does not illustrate in accompanying drawing or describe is form known to a person of ordinary skill in the art in affiliated technical field.In addition, although the demonstration of the parameter that comprises particular value can be provided herein, should be appreciated that, parameter is without definitely equaling corresponding value, but can in acceptable error margin or design constraint, be similar to corresponding value.The direction term of mentioning in embodiment, for example " on ", D score, 'fornt', 'back', " left side ", " right side " etc., be only the direction with reference to accompanying drawing.Therefore, the direction term of use is to be not used for limiting the scope of the invention for explanation.
The invention provides a kind of for frock clamp and welding method without the assembling of intercepting and capturing grided electron gun shadow grid, to improve without the assembly precision of intercepting and capturing grided electron gun shadow grid.
In one exemplary embodiment of the present invention, provide a kind of for the frock clamp without intercepting and capturing the assembling of grided electron gun shadow grid.Fig. 1 is for the structural representation after assembling with shadow grid 4, cathode assembly 5 without the frock clamp of intercepting and capturing grided electron gun shadow grid laser weld according to the embodiment of the present invention.This cathode assembly 5 comprises that negative electrode 51 and cathode tube 52 are integrally formed structure.
Cathode tube 52 is welded by two different cylindrical sections of diameter, and negative electrode 51 is the cylinder of upper surface to lower convexity, and it is welded in the opening part of wider section cylinder on cathode tube.Shadow grid 4 is positioned at the top of negative electrode 51, and its diameter is less than or equal to the diameter of wider section cylinder on negative electrode 51.Shadow grid 4 is the radial-vane grid network structure relatively approaching with negative electrode radius of curvature.This shadow grid is installed on negative electrode but has a very little distance and aim at negative electrode with cathode plane, and shadow grid and negative electrode are idiostatic, to suppress just to the cathode electronics transmitting under shadow grid grid silk.
As shown in Figure 1, this frock clamp comprises: base 1, briquetting 2 and four screws 3.Fig. 2 is the cutaway view of base in frock clamp shown in Fig. 1.Fig. 3 is the top view of base in frock clamp shown in Fig. 1.
Please refer to Fig. 2 and Fig. 3, this base 1 is hollow cylindrical structure, and the internal diameter of this centre hole of base 11 equals cathode tube 52 lower end external diameters.On described cathode tube, thinner section cylinder inserts in the centre bore (11) of this base, and wider section cylinder frame is in the top of base.Bore four base screws 12 that distribute around even circumferential at base upper surface, this base screw coordinates with screw 3, by briquetting 2, shadow grid 4 is tightly pressed on cathode assembly 5.
Fig. 4 is the cutaway view of briquetting in frock clamp shown in Fig. 1, and Fig. 5 is the top view of briquetting in frock clamp shown in Fig. 1, and Fig. 6 is the side view of briquetting in frock clamp shown in Fig. 1.Please refer to Fig. 4, Fig. 5 and Fig. 6, this briquetting 2 is hollow cylindrical structure, and its centre bore is up-thin-low-thick structure, and the diameter on top is less than the diameter of shadow grid, the diameter of the slightly larger in diameter of bottom wider section cylinder on cathode tube, thus detent 21 formed in the bottom of briquetting centre bore.The degree of depth of this detent 21 is less than the height of wider section cylinder on cathode tube, and M briquetting side opening 24 radially offered in the outside of this detent 21, offers vertically N briquetting through hole 23 simultaneously.
The centre position of briquetting 2 axially forms briquetting centre bore 22 downward along briquetting, by this briquetting centre bore, can observe the shadow grid of below and the alignment case of negative electrode.Have four briquetting through holes 23 that distribute around even circumferential in the outer ring of briquetting centre bore, its diameter is larger than the diameter of the diameter of thread of screw 3 and base screw, and screw 3 coordinates with base screw through this briquetting through hole.
Briquetting 2 sides have eight equally distributed briquetting side openings 24 apart from the nearer one end of detent 21, regulate the concentricity of shadow grid 4 and negative electrode 51, at these eight briquetting side opening places, shadow grid 4 and cathode assembly 5 are welded together simultaneously.
Please refer to Fig. 1, the internal thread of the external screw thread of this screw 3 and base screw matches, and can, by fastening to briquetting 2 and base 1, regulate the depth of parallelism of shadow grid 4 and negative electrode 51 by described screw.
So far, the present embodiment frock clamp is introduced complete, below introduces the method for this frock clamp welding without traps electrons rifle shadow grid that adopt.The method comprises:
Steps A: the cathode tube of cathode assembly 52 is inserted in the centre bore 11 of base, on cathode tube 52, wider section cylinder is set up in the top of base 1;
Step B: shadow grid 4 to be welded is pressed on negative electrode 51 by briquetting 2, is tightened against 4 screws 3 in the base screw 12 of base, and the position of shadow grid 4 above cathode assembly fixed;
Step C: measure the distance of shadow grid 4 upper surfaces to negative electrode 51 upper surfaces by the centre bore 22 of briquetting, concentricity and the depth of parallelism of observation shadow grid and negative electrode;
Step D: slightly stir position, shadow grid left and right by briquetting side opening 24, fine setting shadow grid and cathode surface concentricity;
Step e: by the degree of tightening of four screws, finely tune up and down shadow grid and the cathode surface depth of parallelism; And
Step F: after concentricity and the depth of parallelism meet the requirements, adopt the mode of laser welder that shadow grid 4 and cathode assembly 5 are welded together by eight briquetting side openings 24.
So far the frock clamp of, by reference to the accompanying drawings the present embodiment having been intercepted and captured to grided electron gun shadow grid laser weld for nothing have been described in detail.Describe according to above, those skilled in the art should be to the present invention for having had clearly understanding without the frock clamp of intercepting and capturing grided electron gun shadow grid laser weld.
In addition, the above-mentioned definition to each element and method is not limited in various concrete structures, shape or the mode in embodiment, mentioned, and those of ordinary skill in the art can change simply or replace it, for example:
(1) shadow grid grid silk structure can be any one in square grid, hexagonal honeycomb grid, radial-vane grid;
(2) number of briquetting side opening can be more than or equal to 2 arbitrarily, depending on size and the assembly precision of briquetting, and be not limited to the number in above-described embodiment, generally, the number of briquetting side opening is 4,6 or 8;
(3) number of briquetting through hole can be more than or equal to 2 arbitrarily, depending on size and the assembly precision of briquetting, and be not limited to the number in above-described embodiment, generally, the number of briquetting side opening is 4,6 or 8.
In sum, frock clamp of the present invention can not only ensure to weld in high quality shadow grid and cathode assembly, when reducing process, can also ensure that in use procedure, shadow grid can not become flexible, come off.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. for the frock clamp without intercepting and capturing the assembling of grided electron gun shadow grid, it is characterized in that:
This comprising without the cathode assembly in traps electrons rifle (5): cathode tube (52), and two cylindrical sections different by diameter are welded, and negative electrode (51), are welded in the opening part of wider section cylinder on cathode tube;
Shadow grid (4) is positioned at the top of described negative electrode (51), and its diameter is less than or equal to the diameter of the upper wider section cylinder of described negative electrode (51);
Described frock clamp comprises:
Base (1), be hollow cylindrical structure, on described cathode tube, thinner section cylinder inserts in the centre bore (11) of this base, wider section cylinder frame, in the top of base, is offered N the base screw (12) distributing around even circumferential vertically at the upper surface of base (1);
Briquetting (2), be hollow cylindrical structure, its centre bore is up-thin-low-thick structure, the diameter on top is less than the diameter of shadow grid, the diameter of bottom is greater than the diameter of wider section cylinder on cathode tube, thereby detent (21) is formed at the bottom at briquetting centre bore, and the degree of depth of this detent (21) is less than the height of wider section cylinder on cathode tube, M briquetting side opening (24) radially offered in the outside of this detent (21), offers vertically N briquetting through hole (23) simultaneously;
N screw (3), it is stretched into by the N on briquetting briquetting through hole (23) respectively, be bolted in N the base screw (12) of base, make the top of described detent (21) be pressed in the outer ledge of shadow grid (4), shadow grid (4) is pressed on to the top of negative electrode (51), the centre bore of described briquetting forms observation window, wherein, N >=2, M >=2.
2. frock clamp according to claim 1, is characterized in that, the grid silk structure of described shadow grid is square grid, hexagonal honeycomb grid or radial-vane grid.
3. frock clamp according to claim 1, is characterized in that, described N=4.
4. frock clamp according to claim 1, is characterized in that, described M=6 or 8.
5. a welding method, for utilizing the frock clamp described in claim 1 to 4 any one to weld without traps electrons rifle shadow grid, comprising:
Steps A: upper the cathode tube of cathode assembly (52) thinner section cylinder is inserted in the centre bore (11) of base, and the upper wider section cylinder of cathode tube (52) is set up in the top of base;
Step B: shadow grid (4) to be welded is pressed on negative electrode (51) by briquetting (2), N screw (3) is tightened against in the base screw (12) of base, shadow grid (4) is fixed in the position of negative electrode (51) top;
Step C: measure the distance of shadow grid upper surface to negative electrode upper surface by the centre bore (22) of briquetting, surperficial concentricity and the depth of parallelism of observation shadow grid and negative electrode;
Step D: stir the position, left and right of shadow grid by briquetting side opening (24), adjust the surperficial concentricity of shadow grid (4) and negative electrode (51);
Step e: by regulating the degree of tightening of N screw (3), adjust the surperficial depth of parallelism of shadow grid (4) and negative electrode (51); And
Step F: after concentricity and the depth of parallelism meet the requirements, adopt the mode of laser weld that shadow grid (4) and cathode assembly (5) are welded together by briquetting side opening (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410414971.0A CN104148862B (en) | 2014-08-21 | 2014-08-21 | Frock clamp and the welding method of the assembling of grided electron gun shadow grid is intercepted and captured for nothing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410414971.0A CN104148862B (en) | 2014-08-21 | 2014-08-21 | Frock clamp and the welding method of the assembling of grided electron gun shadow grid is intercepted and captured for nothing |
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| Publication Number | Publication Date |
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| CN104148862A true CN104148862A (en) | 2014-11-19 |
| CN104148862B CN104148862B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410414971.0A Active CN104148862B (en) | 2014-08-21 | 2014-08-21 | Frock clamp and the welding method of the assembling of grided electron gun shadow grid is intercepted and captured for nothing |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105436653A (en) * | 2015-12-11 | 2016-03-30 | 中国科学院电子学研究所 | Special welding fixture for cavity of electronic vacuum device |
| CN105977119A (en) * | 2016-07-12 | 2016-09-28 | 电子科技大学 | Method for determining virtual anode position of grid control electron gun |
| CN106216788A (en) * | 2016-08-23 | 2016-12-14 | 安徽华东光电技术研究所 | A kind of Electronic Control aperture plate welding tooling and welding method |
| CN111230252A (en) * | 2018-12-31 | 2020-06-05 | 深圳硅基仿生科技有限公司 | Jig for vacuum brazing |
| CN111545909A (en) * | 2020-05-18 | 2020-08-18 | 安徽华东光电技术研究所有限公司 | Non-interception grid-control electron gun grid aligning tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106216788A (en) * | 2016-08-23 | 2016-12-14 | 安徽华东光电技术研究所 | A kind of Electronic Control aperture plate welding tooling and welding method |
| CN106216788B (en) * | 2016-08-23 | 2019-07-02 | 安徽华东光电技术研究所 | A kind of welding method that aperture plate welding tooling is controlled electronically |
| CN111230252A (en) * | 2018-12-31 | 2020-06-05 | 深圳硅基仿生科技有限公司 | Jig for vacuum brazing |
| CN111230252B (en) * | 2018-12-31 | 2021-12-31 | 深圳硅基仿生科技有限公司 | Jig for vacuum brazing |
| CN111545909A (en) * | 2020-05-18 | 2020-08-18 | 安徽华东光电技术研究所有限公司 | Non-interception grid-control electron gun grid aligning tool |
| CN111545909B (en) * | 2020-05-18 | 2022-01-14 | 安徽华东光电技术研究所有限公司 | Non-interception grid-control electron gun grid aligning tool |
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