Superconducting cavity helium groove machining clamp and superconducting cavity helium groove machining method

Abstract

The invention discloses a superconducting cavity helium groove machining clamp and a superconducting cavity helium groove machining method. The superconducting cavity helium groove machining clamp comprises a left lower supporting seat, a right lower supporting seat, a left upper pressing plate, a right upper pressing plate and a supporting column. The left lower supporting seat and the right lower supporting seat are oppositely arranged, arc-shaped grooves are formed in the upper end face of the left lower supporting seat and the upper end face of the right lower supporting seat, the left upper pressing plate and the right upper pressing plate are correspondingly arranged over the left lower supporting seat and the right lower supporting seat, the left upper pressing plate is connected with the left lower supporting seat through a screw, and the right upper pressing plate is connected with the right lower supporting seat through a screw. The right upper pressing plate is connected with the right lower supporting seat through a pull rod, arc-shaped pressing grooves matched with the arc-shaped grooves are formed in the lower end face of the left upper pressing plate and the lower end face of the right upper pressing plate, and the supporting column is arranged between the left lower supporting seat and the right lower supporting seat. The tool clamp is clamped and fixed to a platform at a time, whole cavities in the same batch do not need to be dismantled, the product size consistency is improved, corrugated pipes can be better protected, and the size and frequency in the product machining process are easy to guarantee.

Description

Technical Field

[0001] The invention relates to the technical field of superconducting cavities, and in particular to a superconducting cavity helium groove machining fixture and a superconducting cavity helium groove machining method. Background Art

[0002] During the manufacturing process of superconducting cavities, the performance requirements of the products are very strict, and the dimensional accuracy, position accuracy, and the frequency of the whole cavity are strictly controlled. The processing of the four mounting ears is the whole cavity processing after the product is assembled. The installation requirements are high, the frequency of the whole cavity changes greatly, and the accuracy requirements are difficult to guarantee due to deformation. At present, the main method of installing and processing the ears is to clamp the middle part of the bellows, because the device reduces the vibration by clamping the bellows, and the bellows is a soft connection component. Failure to control the jacket vibration is the biggest cause of the frequency change. This connection method is difficult to guarantee the size, and the installation is time-consuming and the production practicality is not strong. During installation, two people are required to cooperate, the workload is large, and the four fixed rods need to be removed, which is easy to change the frequency of the whole cavity and easily cause the (0.6mm thick) bellows to bump; the surrounding 12 Ф12 holes are used to wear Ф10 fixed rods, but the fact is that the angle position of the cavity rod changes greatly, and this hole spacing has poor versatility. Each product needs to remove the tooling and reinstall it, and the processing size consistency is poor. Summary of the invention

[0003] In order to solve the technical problems existing in the above-mentioned technology, it is necessary to provide a superconducting cavity helium slot machining fixture.

[0004] A superconducting cavity helium slot machining fixture comprises a left lower support seat, a right lower support seat, a left upper pressure plate, a right upper pressure plate, and a support column; the left lower support seat and the right lower support seat are arranged opposite to each other, and the upper end surfaces of the left lower support seat and the right lower support seat are both provided with an arc-shaped groove, the left upper pressure plate and the right upper pressure plate are correspondingly arranged directly above the left lower support seat and the right lower support seat, the left upper pressure plate is connected to the left lower support seat by a screw, the right upper pressure plate is connected to the right lower support seat by a pull rod, the lower end surfaces of the left upper pressure plate and the right upper pressure plate are both provided with an arc-shaped pressure groove matched with the arc-shaped groove, and the support column is arranged between the left lower support seat and the right lower support seat.

[0005] Preferably, an adjustment block is provided on the left lower support seat, and the upper end of the adjustment block is higher than the upper end surface of the left lower support seat.

[0006] Preferably, an adjusting push rod is threadedly mounted on the left lower supporting seat, and the upper end of the adjusting push rod can contact the lower end surface of the left lower supporting seat.

[0007] Preferably, there are two adjusting push rods, which are symmetrically arranged on both sides of the left lower support seat.

[0008] Preferably, a workbench is provided at the bottom of the left lower support seat and the right lower support seat, and the left lower support seat and the right lower support seat can slide towards each other along the surface of the workbench.

[0009] It is also necessary to provide a method for machining a superconducting cavity helium groove.

[0010] A method for machining a superconducting cavity helium groove, using the superconducting cavity helium groove machining fixture described above for machining, comprises the following steps: S1: Wipe the work surface clean, use a dial indicator to align the left lower support seat and the right lower support seat to the same plane, and fix the left lower support seat and the right lower support seat; S2: placing the wrapped and frequency-measured superconducting cavity to be processed on the left lower support seat and the right lower support seat, so that the helium groove of the superconducting cavity is placed in the arc-shaped groove on the left lower support seat and the right lower support seat; S3: First install the left upper pressing plate, align it with a dial indicator so that the coupling flange is perpendicular to the workbench, adjust the left and right adjusting push rods so that the pressing force of the left upper pressing plate is parallel and concentric with the reference ring, and fix the left upper pressing plate and the left lower supporting seat with screws; S4: Observe with the pointer of the dial indicator, tighten the upper pressure plate on the right, and take the left and right sides as the standard to ensure that the left and right reference rings are parallel and concentric (that is, the superconducting cavities are parallel and concentric); S5: Use a height gauge to initially measure the heights of the four mounting lugs, mark them and keep a record; S6: Use a dial indicator to hit the side lifting lugs to ensure that the scale remains unchanged. Use support columns to support the four mounting lifting lugs accordingly, with solid support as the standard, and use a dial indicator to check and confirm; S7: Process the lugs on a horizontal machining center using F120, S2200, ð0.4, ФF2003 as machining parameters to determine the sound correction parameters; S8: Use a micrometer to measure each time to determine the machining tool amount and final machining size.

[0011] Preferably, in step S1, a dial indicator is used to align the left lower support seat and the right lower support seat to the same plane, and the height error of the left lower support seat and the right lower support seat needs to be maintained within 0.01 mm.

[0012] Compared with the prior art, the superconducting cavity helium slot machining fixture and superconducting cavity helium slot machining method provided by the present invention can be clamped and fixed to the platform at one time, and there is no need to remove the whole cavity in the same batch, which improves the consistency of product size, reduces the workload, and is conducive to better protection of the bellows. The tooling can be used to ensure the parallelism of the axis and achieve the effect of indirectly measuring the height. The clamping force on the reference ring greatly reduces the external force on the helium slot, so that the helium slot does not deform due to external forces. The original height is measured after the couple and flange are aligned, and the dimensional accuracy is measured in sequence after processing to ensure that the dimensional accuracy is plus or minus 0.1mm. The dedicated adjustment push rod is used to fix the installation ear, adjust the flatness, and eliminate the vibration force at the same time, ensuring that the frequency change of the whole cavity before and after processing is reduced from the previous 200k to about 20K. This kind of solution to eliminate the vibration force of the intermediate soft connection component has been achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the structure of the present invention.

[0015] Figure 2 For the present invention Figure 1 Schematic diagram of the structure from another angle.

[0016] Figure 3 It is a schematic diagram of the structure of the present invention after clamping and fixing the superconducting cavity.

[0017] Figure 4 It is a schematic diagram of the structure of the superconducting cavity of the present invention.

[0018] Figure 5 It is a schematic diagram of the cross-sectional structure of the superconducting cavity of the present invention.

[0019] In the figure: left lower support seat 01, right lower support seat 02, left upper pressure plate 03, right upper pressure plate 04, support column 05, arc groove 06, arc pressure groove 07, adjustment block 08, adjustment top rod 09, workbench 10, superconducting cavity 20, helium tank 30, lifting ear 40. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner", "lower" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0022] Please see Figures 1 to 3 In one embodiment, the present invention provides a superconducting cavity helium slot machining fixture, including a left lower support seat 01, a right lower support seat 02, a left upper pressure plate 03, a right upper pressure plate 04, and a support column 05; the left lower support seat 01 and the right lower support seat 02 are arranged opposite to each other, and the upper end surfaces of the left lower support seat 01 and the right lower support seat 02 are both provided with an arc groove 06, the left upper pressure plate 03 and the right upper pressure plate 04 are correspondingly arranged directly above the left lower support seat 01 and the right lower support seat 02, the left upper pressure plate 03 is connected to the left lower support seat 01 by a screw, and the right upper pressure plate 04 is connected to the right lower support seat 02 by a pull rod, and the lower end surfaces of the left upper pressure plate 03 and the right upper pressure plate 04 are both provided with an arc pressure groove 07 matched with the arc groove 06, and the support column 05 is arranged between the left lower support seat 01 and the right lower support seat 02.

[0023] Specifically, an adjustment block 08 is provided on the left lower support seat 01, and the upper end of the adjustment block 08 is higher than the upper end surface of the left lower support seat 01. The adjustment block 08 is installed on the left lower support seat 01 by bolts or screws. Of course, in order to better keep the left and right sides of the left lower support seat 01 consistent, two adjustment blocks 08 are symmetrically provided on both sides of the left lower support seat 01. The adjustment block 08 can ensure that the left upper pressure plate 03 is parallel to the left lower support seat 01 after contact.

[0024] Specifically, an adjusting push rod 09 is threadedly mounted on the left lower support seat 01, and the upper end of the adjusting push rod 09 can contact the lower end surface of the left lower support seat 01. By adjusting the adjusting push rod 09, the left upper pressing plate 03 can be made to press the reference ring parallel and concentric.

[0025] There are two adjusting push rods 09 , and the two adjusting push rods 09 are symmetrically arranged on both sides of the left lower support seat 01 .

[0026] Specifically, a workbench 10 is provided at the bottom of the left lower support seat 01 and the right lower support seat 02 , and the left lower support seat 01 and the right lower support seat 02 can slide toward each other along the surface of the workbench 10 .

[0027] To more clearly express the technical solution of the present invention, taking a 3.9GHz 9Cell superconducting cavity as an example, in one embodiment, the present invention provides a superconducting cavity helium groove machining method, which is machined using the superconducting cavity helium groove machining fixture, comprising the following steps: S1: Wipe the 10th surface of the workbench clean, use a dial indicator to align the left lower support seat 01 and the right lower support seat 02 to the same plane, and keep the height error of the left lower support seat 01 and the right lower support seat 02 within 0.01mm; and fix the left lower support seat 01 and the right lower support seat 02; S2: Place the wrapped and frequency-measured 3.9GHz9Cell superconducting cavity to be processed on the left lower support seat 01 and the right lower support seat 02, so that the helium groove of the superconducting cavity is placed in the arc groove 06 on the left lower support seat 01 and the right lower support seat 02; use a dial indicator to adjust the helium groove reference ring (Y axis) and the coupling flange (X axis) to the required range according to the measurement requirements; S3: First install the left upper pressing plate 03, align it with a dial indicator so that the coupling flange is perpendicular to the workbench 10, adjust the left and right adjusting push rods 09 so that the pressing force of the left upper pressing plate 03 is parallel and concentric with the reference ring, and fix the left upper pressing plate 03 and the left lower supporting seat 01 with screws; when fixing, use screws to fix the left upper pressing plate 03 and the left lower supporting seat 01, and the screws A and B on both sides of the left upper pressing plate 03 are symmetrical; S4: Observe with the pointer of the dial indicator and tighten the right upper pressure plate 04, taking the left and right sides pressed tightly and parallel as the standard to ensure that the left and right reference rings are parallel and concentric (that is, the superconducting cavities are parallel and concentric); S5: Use a height gauge to initially measure the heights of the four mounting lugs, mark them and keep a record; S6: Use a dial indicator to hit the side lifting lugs to ensure that the scale remains unchanged. Use support column 05 to support the four mounting lifting lugs accordingly. Use a dial indicator to check and confirm the support. S7: Process the lugs on a horizontal machining center using F120, S2200, ð0.4, ФF2003 as machining parameters to determine the sound correction parameters; S8: Use a micrometer to measure each time to determine the machining tool amount and final machining size.

[0028] What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A superconducting cavity helium slot machining fixture, characterized in that: It includes a left lower support seat, a right lower support seat, a left upper pressure plate, a right upper pressure plate, and a support column; the left lower support seat and the right lower support seat are arranged opposite to each other, and the upper end surfaces of the left lower support seat and the right lower support seat are both provided with arc-shaped grooves, the left upper pressure plate and the right upper pressure plate are correspondingly arranged directly above the left lower support seat and the right lower support seat, the left upper pressure plate is connected to the left lower support seat by a screw, the right upper pressure plate is connected to the right lower support seat by a pull rod, the lower end surfaces of the left upper pressure plate and the right upper pressure plate are both provided with arc-shaped pressure grooves matched with the arc-shaped grooves, and the support column is arranged between the left lower support seat and the right lower support seat.

2. The superconducting cavity helium slot machining fixture according to claim 1, characterized in that: An adjusting block is arranged on the left lower supporting seat, and the upper end of the adjusting block is higher than the upper end surface of the left lower supporting seat.

3. The superconducting cavity helium slot machining fixture according to claim 2, characterized in that: An adjusting push rod is threadedly mounted on the left lower supporting seat, and the upper end of the adjusting push rod can contact the lower end surface of the left lower supporting seat.

4. The superconducting cavity helium slot machining fixture according to claim 3, characterized in that: There are two adjusting push rods, which are symmetrically arranged on both sides of the left lower support seat.

5. The superconducting cavity helium slot machining fixture according to claim 1, characterized in that: A workbench is arranged at the bottom of the left lower support seat and the right lower support seat, and the left lower support seat and the right lower support seat can slide in opposite directions along the surface of the workbench.

6. A method for machining a superconducting cavity helium groove, using the superconducting cavity helium groove machining fixture according to any one of claims 1 to 5, characterized in that: The following steps are included: S1: Wipe the work surface clean, use a dial indicator to align the left lower support seat and the right lower support seat to the same plane, and fix the left lower support seat and the right lower support seat; S2: placing the wrapped and frequency-measured superconducting cavity to be processed on the left lower support seat and the right lower support seat, so that the helium groove of the superconducting cavity is placed in the arc-shaped groove on the left lower support seat and the right lower support seat; S3: First install the left upper pressing plate, align it with a dial indicator so that the coupling flange is perpendicular to the workbench, adjust the left and right adjusting push rods so that the pressing force of the left upper pressing plate is parallel and concentric with the reference ring, and fix the left upper pressing plate and the left lower supporting seat with screws; S4: Observe with the pointer of the dial indicator, tighten the upper pressure plate on the right, and take the left and right sides as the standard to ensure that the left and right reference rings are parallel and concentric (that is, the superconducting cavities are parallel and concentric); S5: Use a height gauge to initially measure the heights of the four mounting lugs, mark them and keep a record; S6: Use a dial indicator to hit the side lifting lugs to ensure that the scale remains unchanged. Use support columns to support the four mounting lifting lugs accordingly, with solid support as the standard, and use a dial indicator to check and confirm; S7: Process the lugs on a horizontal machining center using F120, S2200, ð0.4, ФF2003 as machining parameters to determine the sound correction parameters; S8: Use a micrometer to measure each time to determine the machining tool amount and final machining size.

7. The method for machining a superconducting cavity helium groove according to claim 6, characterized in that: In step S1, use a dial indicator to align the left lower support seat and the right lower support seat to the same plane, and the height error of the left lower support seat and the right lower support seat must be kept within 0.01mm.

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