An assembly tool capable of quantitatively adjusting filament height and an adjustment method thereof

Abstract

The present invention provides an assembly tool capable of quantitatively adjusting the height of a filament and an adjustment method thereof. The assembly tool comprises a quantitatively adjustable support tool and a quantitatively adjustable tool. The quantitatively adjustable support tool has openings at both ends and a hollow channel in the center for a filament assembly to enter. The quantitatively adjustable support tool is provided with a fixing portion for securing the filament assembly. The quantitatively adjustable tool comprises a base and a cylindrical boss fixed to the upper end surface of the base. When the upper end surface of the base contacts the lower end surface of the quantitatively adjustable support tool, the cylindrical boss passes through the bottom opening of the quantitatively adjustable support tool, enters the hollow channel, and contacts the cathode filament in the filament assembly to quantitatively adjust the height of the cathode filament. The present invention enables quantitative adjustment of the relative height of the filament assembly without manual, single-piece adjustment, effectively improving assembly efficiency and quality.

Description

Technical Field

[0001] The present invention relates to the technical field of assembly tooling, in particular to an assembly tool capable of quantitatively adjusting the height of a filament and an adjustment method thereof. Background Art

[0002] The electron gun uses a direct bombardment method to heat and evaporate the material. The gun consists of a cathode filament, grid, anode, focusing coil, and XY deflection coils. The cathode filament is made of a high-temperature metal such as tungsten. When connected to a power source and heated to incandescence, it emits thermal electrons from the surface of the cathode filament. These electrons are first emitted as an electron beam by the cathode and then accelerated by the grounded anode. After passing through the central hole of the anode, the fully accelerated and gradually diverging electron beam is then focused by the magnetic field of the focusing coil and drawn out of the electron gun body, finally directly bombarding the surface of the material to be plated in the crucible. The XY deflection coil uses the XY magnetic field it creates to slightly shift the electron beam in the XY direction, achieving the goal of scanning the focused point across the surface of the material to be plated.

[0003] The height of the cathode filament directly affects the curvature of the cathode's equipotential surface, thereby affecting the impact area of ​​the focused electrons emitted from the cathode. Therefore, cathode filament height is a key factor influencing the consistency of electron beam emission parameters. Cathode filaments are primarily made of high-temperature metals such as tungsten. Due to the high hardness and susceptibility of tungsten filaments, the height of the cathode filament is difficult to control during assembly. Current manual adjustment methods for cathode filament assembly cannot meet the requirements for consistent and efficient cathode filament assembly. Summary of the Invention

[0004] The purpose of the present invention is to provide an assembly tool that can quantitatively adjust the height of the cathode filament in order to solve the problem in the prior art that the height of the cathode filament is difficult to adjust accurately.

[0005] Another aspect of the present invention is to provide a method for adjusting the assembly tool.

[0006] The technical solution adopted to achieve the purpose of the present invention is:

[0007] An assembly tool capable of quantitatively adjusting the height of a filament, comprising a quantitatively adjustable support tool and a quantitatively adjustable tool, wherein:

[0008] The two ends of the quantitative adjustment support tool are open, and the center forms a hollow channel for the filament assembly to enter. The quantitative adjustment support tool is provided with a fixing portion for fixing the filament assembly;

[0009] The quantitative adjustment tooling includes a base and a cylindrical boss fixed to the upper end surface of the base. When the upper end surface of the base contacts the lower end surface of the quantitative adjustment support tooling, the cylindrical boss passes through the bottom opening of the quantitative adjustment support tooling and enters the hollow channel to contact the cathode filament in the filament assembly to quantitatively adjust the cathode filament height.

[0010] In the above technical solution, the fixing portion includes one or more through-hole structures provided on the circumferential side wall of the quantitative adjustment support fixture, and the through-hole structures are arranged opposite to the fastening threaded holes of the filament assembly to fix the filament assembly.

[0011] In the above technical solution, there are two to four through-hole structures, which are evenly distributed on the circumferential side wall, and are axially symmetrically arranged with the axis of the quantitative adjustment support fixture as the axis.

[0012] In the above technical solution, the fixing portion further includes a positioning boss provided on the inner wall of the quantitative adjustment support fixture, the positioning boss is circumferentially arranged, and the positioning boss is in contact with and cooperates with the filament assembly.

[0013] In the above technical solution, the quantitative adjustment support tooling is a cylindrical structure, the lower end face of the quantitative adjustment support tooling is a positioning annular surface, the positioning annular surface is in contact with the base, and the center of the positioning annular surface forms a bottom opening for the cylindrical boss to enter.

[0014] In the above technical solution, the bottom opening is a circular hole, and the diameter of the circular hole is larger than the outer diameter of the cylindrical boss.

[0015] In the above technical solution, the material of the quantitative adjustment support tooling is stainless steel 3Cr13, which has high strength, hardness and wear resistance, and is reliable and durable.

[0016] In the above technical solution, the base is a disc-shaped base, and the outer diameter of the disc-shaped base is larger than the outer diameter of the lower end surface of the quantitative adjustment support tooling.

[0017] In the above technical solution, the cylindrical boss is coaxially fixed to the upper end surface of the disc-shaped base.

[0018] In the above technical solution, the material of the quantitative adjustment tooling is copper.

[0019] Another aspect of the present invention further includes a method for adjusting the assembly tool, comprising the following steps:

[0020] Step 1: Preliminarily fix the cathode filament on the filament assembly. The axial position of the cathode filament on the filament assembly is adjustable.

[0021] Step 2: After the initial fixation is completed, the filament assembly is inserted into the hollow channel through the front end opening of the quantitative adjustment support tooling, and the filament assembly is fastened to the quantitative adjustment support tooling through the fixing portion;

[0022] Step 3: Fitting the upper end surface of the base to the lower end surface of the quantitative adjustment support fixture, inserting the cylindrical boss into the hollow channel, and contacting the cylindrical boss with the filament assembly to fix the relative axial height of the cathode filament in the filament assembly;

[0023] Step 4: After the adjustment is completed, the filament assembly is removed from the assembly tool and assembled on the electron gun.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The assembly tool of the present invention is a modular assembly tool with a simple structure and convenient operation. It can effectively realize the fixed height assembly of the cathode filament, provides an important theoretical basis for the high-efficiency and high-quality assembly of the electron gun, and has certain guiding significance for engineering practice.

[0026] 2. The material of the quantitative adjustment support tooling in the present invention is stainless steel 3Cr13, and the material of the quantitative adjustment tooling is copper, which can effectively increase the service life of the assembly tooling and reduce the wear on the filament during the assembly process.

[0027] 3. The present invention can achieve quantitative adjustment of the relative height of the filament assembly by quantitatively adjusting the contact and cooperation of the relative positions of the supporting tooling and the tooling and the filament assembly, without the need for manual single-piece adjustment, thereby effectively improving assembly efficiency and assembly quality.

[0028] 4. The component structure of the present invention is simple and easy to process, which can effectively reduce manufacturing costs and facilitate market promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Shown is a schematic structural diagram of the present invention.

[0030] Figure 2 Shown is a schematic structural diagram of the quantitative adjustment support tooling.

[0031] Figure 3 The figure shows the structural diagram of the quantitative adjustment tooling.

[0032] In the figure: 1- quantitative adjustment support tooling, 2- quantitative adjustment tooling, 3- through hole structure, 4- base, 5- cylindrical boss, 6- positioning annulus, 7- bottom opening, 8- positioning boss. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] Example 1

[0035] An assembly tool capable of quantitatively adjusting the height of a filament, comprising a quantitatively adjustable support tool 1 and a quantitatively adjustable tool 2, wherein:

[0036] The two ends of the quantitative adjustment support tool 1 are open, and the center forms a hollow channel for the filament assembly to enter. The quantitative adjustment support tool 1 is provided with a fixing portion for fixing the filament assembly;

[0037] The quantitative adjustment tooling 2 includes a base 4 and a cylindrical boss 5 fixed to the upper end surface of the base 4. When the upper end surface of the base 4 contacts the lower end surface of the quantitative adjustment support tooling 1, the cylindrical boss 5 passes through the bottom opening 7 of the quantitative adjustment support tooling 1 and enters the hollow channel to contact the cathode filament in the filament assembly to quantitatively adjust the height of the cathode filament.

[0038] In practical applications, the cathode filament is fixed by a filament assembly, and then the filament assembly is assembled on the electron gun.

[0039] Adjusting the cathode filament height by the assembly tool of this embodiment includes the following steps:

[0040] Step 1: Preliminarily fix the cathode filament on the filament assembly. At this time, the axial position of the cathode filament on the filament assembly is adjustable.

[0041] Step 2, after the initial fixation is completed, the filament assembly is inserted into the hollow channel through the front end opening of the quantitative adjustment support tooling 1, and the filament assembly is fastened to the quantitative adjustment support tooling 1 through the fixing part, thereby achieving the fastening of the cathode filament in this assembly tooling.

[0042] In step 3, the upper end surface of the base 4 is fitted to the lower end surface of the quantitative adjustment support tooling 1, and the cylindrical boss 5 enters the hollow channel. The cylindrical boss 5 contacts the filament assembly to fix the relative axial height of the cathode filament in the filament assembly, thereby adjusting the axial height of the cathode filament.

[0043] After the adjustment is completed, the filament assembly is removed from the assembly tool and assembled on the electron gun.

[0044] Example 2

[0045] This embodiment further illustrates the structure of the quantitative adjustment support tool 1.

[0046] The fixing portion includes one or more through-hole structures 3 provided on the circumferential side wall of the quantitative adjustment support fixture 1. The through-hole structures 3 are arranged opposite to the fastening threaded holes of the filament assembly to fix the filament assembly. In step 2, screws are passed through the through-hole structures 3 and the filament assembly is fixed to the quantitative adjustment support fixture 1 with the help of the corresponding fastening threaded holes of the filament assembly. There are two to four through-hole structures 3, and the through-hole structures 3 are evenly distributed on the circumferential side wall. The through-hole structures 3 are symmetrically arranged with the axis of the quantitative adjustment support fixture 1 as the axis. Figure 1 As shown, there are four through-hole structures 3 and they are symmetrically arranged.

[0047] The fixing part also includes a positioning boss 8 arranged in the hollow channel of the quantitative adjustment support tooling 1. The positioning boss 8 fixes the axial position of the filament assembly. The positioning boss 8 contacts and cooperates with the filament assembly to locate the axial relative position of the filament assembly and the quantitative adjustment support tooling. The positioning boss 8 cooperates with the through-hole structure 3 to fix the filament assembly on the quantitative adjustment support tooling 1.

[0048] The quantitative adjustment support fixture 1 is a cylindrical structure. The lower end surface of the quantitative adjustment support fixture 1 is a positioning annular surface 6. The positioning annular surface 6 is in contact with the base 4. The center of the positioning annular surface 6 forms a bottom opening 7 for the cylindrical boss 5 to enter. When the quantitative adjustment fixture 2 performs quantitative adjustment, the base 4 contacts and fits the positioning annular surface 6. The cylindrical boss 5 passes through the bottom opening 7 and enters the hollow channel, abutting against the cathode filament, applying force to the cathode filament to adjust its position. The bottom opening 7 is a circular hole with a diameter larger than the outer diameter of the cylindrical boss 5.

[0049] The material of the quantitative adjustment support tooling 1 is stainless steel 3Cr13, which has high strength, hardness and wear resistance, and is reliable and durable.

[0050] Example 3

[0051] This embodiment further illustrates the structure of the quantitative adjustment tool 2.

[0052] The base 4 is a disc-shaped base with an outer diameter greater than the outer diameter of the lower end surface of the quantitative adjustment support fixture 1. The cylindrical boss 5 is coaxially fixed to the upper end surface of the disc-shaped base. The quantitative adjustment fixture 2 is made of copper, which does not cause wear to the cathode filament when in contact with it, and can effectively extend the service life of the assembly fixture.

[0053] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" are used in the embodiments to illustrate the relationship between an element or feature shown in the figures and another element or feature. It should be understood that, in addition to the orientation shown in the figures, spatial terms are intended to include different orientations of the assembly tool during use or operation. For example, if the assembly tool in the figure is inverted, the element described as being "under" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The assembly tool can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0054] Moreover, relational terms such as “first” and “second” are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principles of the present invention. These improvements should also be regarded as the scope of protection of the present invention.

Claims

1. A method for adjusting an assembly tool capable of quantitatively adjusting the height of a filament, characterized in that: The assembly tooling includes quantitative adjustment support tooling and quantitative adjustment tooling, among which: The two ends of the quantitative adjustment support tool are open, and the center forms a hollow channel for the filament assembly to enter. The quantitative adjustment support tool is provided with a fixing portion for fixing the filament assembly; The quantitative adjustment tooling includes a base and a cylindrical boss fixed to the upper end surface of the base. When the upper end surface of the base contacts the lower end surface of the quantitative adjustment support tooling, the cylindrical boss passes through the bottom opening of the quantitative adjustment support tooling, enters the hollow channel, and contacts the cathode filament in the filament assembly to quantitatively adjust the height of the cathode filament. The adjustment method of the assembly tool comprises the following steps: Step 1: Preliminarily fix the cathode filament on the filament assembly. The axial position of the cathode filament on the filament assembly is adjustable. Step 2: After the initial fixation is completed, the filament assembly is inserted into the hollow channel through the front end opening of the quantitative adjustment support tooling, and the filament assembly is fastened to the quantitative adjustment support tooling through the fixing portion; Step 3: Fitting the upper end surface of the base to the lower end surface of the quantitative adjustment support fixture, inserting the cylindrical boss into the hollow channel, and contacting the cylindrical boss with the filament assembly to fix the relative axial height of the cathode filament in the filament assembly; Step 4: After the adjustment is completed, the filament assembly is removed from the assembly tool and assembled on the electron gun.

2. The method for adjusting the assembly tool according to claim 1, wherein: The fixing portion includes one or more through-hole structures provided on the circumferential side wall of the quantitative adjustment support fixture, and the through-hole structures are arranged opposite to the fastening threaded holes of the filament assembly to fix the filament assembly.

3. The adjustment method of the assembly tool according to claim 2, characterized in that: There are two to four through-hole structures, and the through-hole structures are evenly distributed on the circumferential side wall. The through-hole structures are symmetrically arranged with the axis of the quantitative adjustment support fixture as the axis.

4. The method for adjusting an assembly tool according to claim 1, wherein: The fixing portion further comprises a positioning boss arranged on the inner wall of the quantitative adjustment support tooling, the positioning boss is arranged circumferentially, and the positioning boss is in contact with and cooperates with the filament assembly.

5. The method for adjusting an assembly tool according to claim 1, wherein: The quantitative adjustment support fixture is a cylindrical structure, and the lower end surface of the quantitative adjustment support fixture is a positioning annular surface. The positioning annular surface is in contact with the base, and the center of the positioning annular surface forms a bottom opening for the cylindrical boss to enter.

6. The method for adjusting the assembly tool according to claim 5, wherein: The bottom opening is a circular hole, and the diameter of the circular hole is larger than the outer diameter of the cylindrical boss.

7. The method for adjusting an assembly tool according to claim 1, wherein: The material of the quantitative adjustment support tooling is stainless steel 3Cr13.

8. The method for adjusting an assembly tool according to claim 1, wherein: The base is a disc-shaped base, and the outer diameter of the disc-shaped base is larger than the outer diameter of the lower end surface of the quantitative adjustment support tooling.

9. The method for adjusting an assembly tool according to claim 8, wherein: The cylindrical boss is coaxially fixed to the upper end surface of the disc-shaped base.

10. The method for adjusting an assembly tool according to claim 1, wherein: The material of the quantitative adjustment tool is copper.

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