CN109874222A - A kind of processing method of drift tube, draft tube linac and drift tube - Google Patents
A kind of processing method of drift tube, draft tube linac and drift tube Download PDFInfo
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- CN109874222A CN109874222A CN201711276540.2A CN201711276540A CN109874222A CN 109874222 A CN109874222 A CN 109874222A CN 201711276540 A CN201711276540 A CN 201711276540A CN 109874222 A CN109874222 A CN 109874222A
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Abstract
The present invention provides the processing methods of a kind of drift tube, draft tube linac and drift tube, drift tube includes drift tube body assembly and drift pipe end-cap, drift tube body assembly includes drift tube main body, and drift pipe end-cap is connected through a screw thread the one end for being fixed on drift tube main body.Present embodiments can apply to linear accelerator technical fields, it is threadedly coupled by using between drift tube main body and drift pipe end-cap, allow and is packed into permanent magnetism quadrupole electromagnet after first process support bar when processing drift tube, come the outer dimension and assembly permanent magnetism quadrupole electromagnet of repair drift tube main body on the basis of support rod, making the difficulty of processing of drift tube main body reduces, permanent magnetism quadrupole electromagnet assembly precision is higher, it effectively reduces and surveys magnetic number, make that the processing of drift tube is simpler, cost is lower, precision is higher, improves the reliability of drift tube and the yields of workpiece entirety.
Description
Technical field
The present invention relates to linear accelerator technical field, in particular to a kind of drift tube, the drift tube including the drift tube
The processing method of linear accelerator and the drift tube.
Background technique
In the prior art, the connection type between the main body and end cap of drift tube is electron beam welding, due to drift tube sheet
The weld bond of the reason of body structure, drift tube main body and end cap is in the drop shadow spread of support rod, and in welding, electron beam can be propped up
Strut blocks, and is essentially all the welding first welded end cap, then be supported bar this results in existing drift tube.This processing
Difficulty of processing caused by sequence is as follows:
1, magnet will be packed into drift tube main body before welding end cap, because that cannot use cutting in magnet reason process
Liquid keeps the difficulty of processing of drift tube monnolithic case big, it is difficult to meet smoothness requirements；
2, be initially charged with magnet and drift tube main body and end cap be welded and fixed, after processed on the basis of the entirety that assembly is completed
Support rod when processing the entity of distant place with small benchmark, in order to guarantee size and tolerance, is needed because centering reference dimension is small
Processing precise tooling in process, strict control machined parameters cause difficulty of processing big.
Therefore, the overall processing accuracy decline and processing cost for resulting in existing drift tube are promoted.
Summary of the invention
The object of the present invention is to provide it is a kind of processing it is simpler, cost is lower, the higher drift tube of precision.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
The present invention provides a kind of drift tubes, comprising: drift tube body assembly and drift pipe end-cap, the drift tube main body
Component includes drift tube main body, and the drift pipe end-cap is fixed on one end of the drift tube main body, the drift tube main body
One end is threadedly coupled with the drift pipe end-cap.
Drift tube provided in this embodiment, including drift tube body assembly and drift pipe end-cap, drift tube body assembly packet
Columned drift tube main body is included, drift pipe end-cap is fixed on one end of drift tube main body.Wherein, the shape for pipe end-cap of drifting about and
Size matches with drift tube main body, and the outside wall surface of one end of drift tube main body is equipped with external screw thread, drift pipe end-cap and drift
The inner wall of one end of pipe main body cooperation is equipped with internal screw thread, is connected through a screw thread between drift tube main body and drift pipe end-cap,
Keep drift tube main body coaxial with drift pipe end-cap and is fitted close.
In the present embodiment, it is connected through a screw thread between pipe end-cap of drifting about and drift tube main body, eliminates and float in the prior art
The fixing means for moving electron beam welding between pipe main body and drift pipe end-cap, simplifies the manufacturing procedure of drift tube, reduces survey
Magnetic number substantially reduces the difficulty of processing of drift tube.In addition, compared with the prior art, the threaded connection in the present embodiment adds
Work process is simple and fast, and deformation is small, avoids welding deformation reparing process, welded seam area defect and the inside of welding process
Interference of the magnet to welding process improves the connection reliability and processing efficiency of drift tube, reduces processing cost, promotes processing
The yields of part entirety.
Optionally, which further includes permanent magnetism quadrupole electromagnet, has accommodating chamber, the permanent magnetism in the drift tube main body
Quadrupole electromagnet is set in the accommodating chamber, is fixed with pressing ring in the accommodating chamber, and the pressing ring is by the permanent magnetism quadrupole electromagnet pressure
It fastens in the cavity wall of one end far from the drift pipe end-cap of the accommodating chamber.
With the accommodating chamber of hollow cylindrical in drift tube main body, accommodating chamber is interior to be equipped with permanent magnetism quadrupole electromagnet, permanent magnetism quadrupole
Magnet is used to focus the particle beams by drift tube.Annular pressing ring is additionally provided in drift tube main body, pressing ring is fixed on accommodating chamber
In cavity wall, permanent magnetism quadrupole electromagnet (metamagnet skeleton is arranged with outside it) can be pressed abd fixed on by the separate of accommodating chamber by pressing ring
In the cavity wall of the one end for pipe end-cap of drifting about, guarantee that permanent magnetism quadrupole electromagnet is fricton-tight in the central axial direction of accommodating chamber.
It is pressed abd fixed in drift pipe end-cap compared to permanent magnetism quadrupole electromagnet in existing drift tube by spring and tabletting
Fixed form, the present embodiment in accommodating chamber by installing pressing ring additional, making pressing ring locking magnet skeleton and being directly anchored to accommodating chamber
It is interior, and then realize and permanent magnetism quadrupole electromagnet is fixed in drift tube main body, connect nothing between pressing ring and drift pipe end-cap directly
Connect, avoid drift pipe end-cap connect with drift tube main body screw after, because press magnet reaction force acts drift about pipe end-cap
On lead to pipe end-cap screw thread the case where retracting of drifting about, fully ensured that screw thread company between drift tube main body and drift pipe end-cap
The reliability connect.
Optionally, the pressing ring is threadedly coupled with the cavity wall of the accommodating chamber.
In a ring, outside wall surface is equipped with external screw thread to pressing ring, and the inner wall of accommodating chamber is equipped with internal screw thread, and pressing ring can pass through
Its external screw thread is matched with the internal screw thread in accommodating chamber and is fixed in drift tube main body, and then permanent magnetism quadrupole electromagnet is compressed admittedly
It is scheduled in the cavity wall of one end of the separate drift pipe end-cap of accommodating chamber.
Optionally, the pressing ring is equipped with threaded hole, and fastening screw passes through the threaded hole and compresses the permanent magnetism quadrupole
Magnet.
Pressing ring is equipped with threaded hole, and fastening screw compresses permanent magnetism quadrupole electromagnet after passing through threaded hole.Specifically, when assembly,
Permanent magnetism quadrupole electromagnet is put into the intracorporal hollow receiver chamber of drift tube master first；Then pressing ring is placed in accommodating chamber again, is led to
It crosses the external screw thread in the outside wall surface of pressing ring mutually to fix with the screw-internal thread fit on the inner wall of accommodating chamber, and passes through pressing ring for permanent magnetism
Quadrupole electromagnet is pressed abd fixed in the cavity wall of one end of the separate drift pipe end-cap of accommodating chamber；Finally, fastening screw passes through pressing ring
On threaded hole further metamagnet skeleton (i.e. permanent magnetism quadrupole electromagnet) is locked in the accommodating chamber of drift tube main body.
Optionally, which further includes support rod, passes through electricity between the support rod and the drift tube body assembly
Beamlet welding is mutually fixed.
The drift tube of the present embodiment further includes support rod, and support rod is in hollow cylindrical, is welded in drift tube main body point
Water column, support rod are fixed on the upper end of point water column by electron beam welding.Specifically, the lower end of water column will be divided to pass through electronics first
Beam is weldingly fixed on the cylindrical outer wall face of drift tube main body, then the lower end of support rod and the upper end of water column will be divided to pass through electricity
Beamlet, which is weldingly connected, to be connect, i.e., support rod is located at the upper end for dividing water column, is mutually fixed to reach support rod with drift tube body assembly
Purpose.
Existing drift tube requires with the drift tube main body equipped with permanent magnetism quadrupole electromagnet and drifts about pipe end-cap generally
Benchmark centering carrys out process support bar, and centering reference dimension is small at this time, and tooling requires high in process, and difficulty of processing is big.This reality
The technical solution for applying example offer can be propped up before the assembly of permanent magnetism quadrupole electromagnet and drift tube main body are connect with drift pipe end-cap
Strut is welded and fixed, and not only can avoid interference of the permanent magnetism quadrupole electromagnet to welding process, but also can be real with big support rod
Body is benchmark centering to process and assemble permanent magnetism quadrupole electromagnet, drift tube main body and drift pipe end-cap, makes support rod, permanent magnetism quadrupole
Magnet, the machining accuracy of drift tube main body and pipe end-cap of drifting about and assembly precision improve, and processing and assembling process are simpler, have
Conducive to processing cost is reduced, processing efficiency is improved.
Optionally, drift tube main body, the support rod, the water jacket described in repair before being packed into the permanent magnetism quadrupole electromagnet
With during the shape for dividing water column use cutting fluid.
In the present embodiment, before being packed into permanent magnetism quadrupole electromagnet, need to dividing water column, support rod, water jacket and drift tube main body
Between be welded and fixed and repair shape, cutting fluid can be used in the process and cooled down in time and chip removal,
Keep the central axis of support rod conllinear with the central axis of water column is divided, and the center of the central axis of support rod and drift tube main body
Axis intersects vertically；And then keep the central axis of the intracorporal accommodating chamber of drift tube master conllinear with the central axis of drift tube main body,
The central axis for meeting support rod intersects with the central axis upright of the intracorporal accommodating chamber of drift tube master.
Compared with the prior art, the present embodiment uses the processing sequence of loading permanent magnetism quadrupole electromagnet after first welding support rod,
Therefore can weld existing for non-magnet and during repair, usable cutting fluid is preferably to control the coarse of workpiece
Degree reduces welding deformation, improves the machining accuracy of drift tube, avoid interference of the cutting fluid to inner magnet.
A kind of draft tube linac including drift tube described above has been gone back in present invention offer.
The present invention provides a kind of draft tube linac including above-mentioned drift tube, by using drift tube main body and
It is threadedly coupled between drift pipe end-cap, improves the modular construction and process sequence of draft tube linac, made using permanent magnetism four
The mechanical structure of the draft tube linac of pole magnet simplifies, and processing and assembly difficulty reduce, and has fully ensured that drift tube is straight
The indices of line accelerator.
The present invention also provides a kind of processing methods of drift tube, comprising:
1, preparatory processing drift tube main body and drift pipe end-cap, retain machining allowance, by the drift tube main body and water jacket,
Water column is divided mutually to fix, to obtain the drift tube body assembly；
Specifically, firstly, the cylinder outer circle and cylindrical cavity of preparatory processing drift tube main body and pipe end-cap of drifting about, retain
Machining allowance；Then, the interior outer end face and outboard sidewalls face of processing drift tube main body and pipe end-cap of drifting about, completes drift tube main body
With the interior sidewall surface of the processing of first through hole and the second through-hole in the mutually separate both ends of the surface of drift pipe end-cap, pipe end-cap of drifting about
On internal screw thread and drift tube main body cylindric outer side surface on mounting groove processing；Then, in drift tube main body
By the fixed water jacket of electron beam welding to form hollow cylindrical container chamber on side wall, in the mounting groove in drift tube main body
By electron beam welding, fixation divides water column vertically, tentatively to complete the processing of drift tube body assembly；
2, preparatory processing support rod retains machining allowance, and the support rod is fixed on described point by electron beam welding
On water column；
Specifically, the shape of preparatory processing support rod and inner cavity first retain machining allowance；Then support rod is passed through into electricity
Beamlet welding is fixed on the upper end of point water column vertically；
3, support rod described in repair, it is described divide water column, the drift tube main body and the water jacket, make in the support rod
Mandrel line and the central axis for dividing water column are conllinear, and the center of the central axis of the support rod and the drift tube main body
Axis intersects vertically, and the central axis of the intracorporal accommodating chamber of drift tube master and the central axis of the drift tube main body are total
Line；
Specifically, firstly, according to welding deformation situation, to support rod and the shape of water column and internal diameter is divided to repair
Match, keeps support rod central axis conllinear with water column central axis is divided；Then, on the basis of support rod, repair drift tube main body makes
The central axis of support rod intersects with the central axis upright of drift tube main body, i.e., the central axis of support rod, divide in water column
Mandrel line intersects with the central axis upright of drift tube main body；
Then, on the basis of the central axis of above-mentioned drift tube main body, the internal diameter of repair drift tube main body inner water sleeve,
It is conllinear with the central axis of drift tube main body to make the central axis of accommodating chamber, and makes in the central axis and accommodating chamber of support rod
Mandrel line intersects vertically, to guarantee that the intersection point of the central axis of support rod and the central axis of accommodating chamber falls in drift tube main body
Geometric center coordinates claimed range in, and tentatively reach drift tube main body, the shape for dividing water column and support rod and internal diameter
Size and tolerance.Technical solution provided in this embodiment can be in the assembly of permanent magnetism quadrupole electromagnet and drift tube main body and drift tube
It is supported the welding and repair of bar before end cap connection, inner magnet is not only can avoid and welding process is interfered, meanwhile, it can be
The roughness for preferably controlling workpiece in the process using cutting fluid, reduces welding deformation, improves adding for drift tube
Work precision；
4, the gas to the support rod, the connection structure for dividing water column, the drift tube main body and the water jacket is detected
Close property, to guarantee the inside of the connection structure and be welded to connect region No leakage；
In advance to completed support rod, divide water column, drift tube main body and water jacket connection structure carry out vacuum detecting, really
It protects that completed connection structure is complete and air-tightness is good, improves the yields of workpiece entirety, reduce and reprocess cost；
5, permanent magnetism quadrupole electromagnet is assemblied in the intracorporal accommodating chamber of drift tube master；
Permanent magnetism quadrupole electromagnet is pressed abd fixed on by pressing ring in the cavity wall of one end of the separate drift pipe end-cap of accommodating chamber,
The pressing force of pressing ring uniformly fixes magnet steadily, and permanent magnetism quadrupole electromagnet is directly anchored to the intracorporal accommodating chamber of drift tube master
It is interior, so that nothing between pressing ring and drift pipe end-cap be made to be directly connected to, avoids drift pipe end-cap and connect with drift tube main body screw
Afterwards, because the reaction force acts of pressure magnet are the case where drifting about causes drift pipe end-cap screw thread to retract in pipe end-cap, sufficiently
It ensure that the reliability being threadedly coupled between drift tube main body and pipe end-cap of drifting about；In addition, being first process support in the present embodiment
It is packed into permanent magnetism quadrupole electromagnet after bar, permanent magnetism quadrupole electromagnet is assembled on the basis of support rod, makes permanent magnetism quadrupole electromagnet assembly precision
It is higher, reduce magnetic center data error；
6, the threading in the drift tube main body connects the drift tube main body and the drift pipe end-cap screw thread
It connects；
It is threadedly coupled drift tube main body and drift pipe end-cap with constant moment, the connection procedure is simple and fast, and deforms
It is small, the manufacturing procedure of drift tube is simplified, the difficulty of processing of drift tube is reduced；
7, in the magnetic using vibrating-wire magnetic center measuring device and method the measurement permanent magnetism quadrupole electromagnet of a kind of fixed magnet
Heart coordinate (is referred to ensuring that the magnetic center coordinate of the permanent magnetism quadrupole electromagnet falls in the Geometric center coordinates of the drift tube main body
The Geometric center coordinates obtained according to the outer circle measurement of drift tube main body) claimed range (i.e. in the geometry of drift tube main body
Heart coordinate is the center of circle, using the spatial dimension for the three-dimensional ball that required value is done as radius) in, the precision for meeting magnetic center data is wanted
It asks；
8, the comprehensive centering on the basis of the drift tube main body and the support rod, with reference to magnetic center data, (magnetic center is sat
Mark), finish the support rod and it is described divide water column in place, guarantee that the support rod and the central axis for dividing water column cross magnetic
(referring to support rod and the central axis of water column is divided to cross by the center of circle, required value of magnetic center coordinate is three-dimensional ball that radius is done at center
Spatial dimension), and the support rod and the size for dividing water column are met the requirements；
9, using the support rod as benchmark centering, the drift tube main body and the drift pipe end-cap are finished, is made described
Drift tube main body and the drift pipe end-cap meet size, smoothness requirements.
Specifically, drift tube main body is processed into the conical surface with the end face at the mutually separate both ends of drift pipe end-cap, and with branch
Strut is benchmark centering, is finished drift tube main body and drift pipe end-cap (such as to drift tube main body and drift pipe end-cap
Outer side surface, inclined-plane, fillet, first through hole and the second through-hole finished), to guarantee finish, improve drift tube
Machining accuracy.
Technical solution of the present invention has the following beneficial effects: compared with prior art
1, it is threadedly coupled using between drift tube main body and drift pipe end-cap, simplifies the manufacturing procedure of drift tube, reduced
Survey magnetic number, reduces the difficulty of processing of drift tube；In addition, screwing process is simple and fast, and deformation is small, avoids weldering
Welding deformation reparing process, welded seam area defect and the interference to inner magnet to welding process of termination process；
2, permanent magnetism quadrupole electromagnet is steadily fixed in the intracorporal accommodating chamber of drift tube master by pressing ring, makes pressing ring and end cap
It is not directly connected, the reaction force acts for avoiding pressure magnet cause its screw thread to retract in drift pipe end-cap, improve screw thread and connect
Connect reliability；
3, the processing sequence that permanent magnetism quadrupole electromagnet is packed into after first welding support rod is present embodiments provided, using support rod as base
Standard comes repair drift tube outer dimension and assembly permanent magnetism quadrupole electromagnet, reduces the difficulty of processing of drift tube, permanent magnetism quadrupole electromagnet
Assembly precision it is higher；In addition, non-magnet exists in support rod welding process, it can be used cutting fluid to improve the bright and clean of workpiece
Degree；
4, the processing method of drift tube provided in this embodiment only needs 1 survey magnetic, compared with the prior art at least 4 times
Survey magnetic process, survey magnetic number effectively reduce, simplify processing flow, improve the processing efficiency of drift tube；
5, vacuum detecting can be carried out to connection structure in advance before magnet cartridge is matched, it is ensured that completed connection structure it is complete and
Air-tightness is good, improves workpiece yields；
6, the drift tube is easy to maintenance, it is only necessary to vehicle fall to drift about pipe end-cap can carry out drift pipe end-cap or magnet more
It changes.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by specification, right
Specifically noted structure is achieved and obtained in claim and attached drawing.
Detailed description of the invention
Attached drawing is used to provide to further understand technical solution of the present invention, and constitutes part of specification, with this
The embodiment of application technical solution for explaining the present invention together, does not constitute the limitation to technical solution of the present invention.
Fig. 1 is the schematic perspective view according to the drift tube of one embodiment of the invention；
Fig. 2 is the schematic cross-sectional view of drift tube shown in FIG. 1；
Fig. 3 is the portion the A structure enlargement diagram of drift tube shown in Fig. 2；
Fig. 4 is the stereoscopic schematic diagram of drift tube body assembly in Fig. 1；
Fig. 5 is the schematic cross-sectional view of drift tube body assembly in Fig. 4；
Fig. 6 is the schematic perspective view of drift pipe end-cap in Fig. 2；
Fig. 7 is the schematic cross-sectional view of drift pipe end-cap in Fig. 6；
Fig. 8 is the structural schematic diagram of pressing ring in Fig. 2；
Fig. 9 is the schematic cross-sectional view of pressing ring in Fig. 8.
Wherein, the relationship in Fig. 1-Fig. 9 between appended drawing reference and component names are as follows:
1 support rod, 2 points of water columns, 3 drift tube main bodys, 31 first through hole, 4 drift pipe end-caps, 41 second through-holes, 42 is cyclic annular
Flange, 5 water jackets, 6 permanent magnetism quadrupole electromagnets, 7 pressing rings, 71 threaded holes, 8 fastening screws, 9 straight pins, 10 blind holes.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature can mutual any combination.
As shown in Figure 1-Figure 3, a kind of drift tube, including drift tube body assembly and drift pipe end-cap are present embodiments provided
4, drift tube body assembly includes columned drift tube main body 3, and drift pipe end-cap 4 is fixed on one end of drift tube main body 3.Its
In, the shape and size of drift pipe end-cap 4 match with drift tube main body 3, and the outside wall surface of one end of drift tube main body 3 is equipped with
The inner wall of one end that external screw thread, drift pipe end-cap 4 and drift tube main body 3 cooperate is equipped with internal screw thread (such as Fig. 6 and Fig. 7 institute
Show), it is fixedly connected by the cooperation of external screw thread and internal screw thread, keeps drift tube main body 3 coaxial and close with drift pipe end-cap 4
Cooperation.
In the present embodiment, it is connected through a screw thread between pipe end-cap 4 of drifting about and drift tube main body 3, has canceled the prior art
The fixing means of electron beam welding, simplifies the manufacturing procedure of drift tube, subtracts between middle drift tube main body 3 and drift pipe end-cap 4
Lack survey magnetic number, substantially reduces the difficulty of processing of drift tube.In addition, compared with the prior art, the screw thread in the present embodiment
It is simple and fast to connect process, and deformation is small, avoids reparing process, the welded seam area defect of the welding deformation of welding process
And interference of the inner magnet to welding process, the connection reliability and processing efficiency of drift tube are improved, processing cost is reduced,
Promote the yields of product.
As shown in figure 3, having the inner cavity of hollow cylindrical in drift tube main body 3, which (such as passes through electron beam
It is welded and fixed) there is water jacket 5, accommodating chamber is formed in water jacket 5, is equipped in accommodating chamber and is used to focus the particle beams for passing through drift tube
Permanent magnetism quadrupole electromagnet 6.The water-cooling channel that annular is formed between the inner wall and water jacket 5 of drift tube main body 3, for in accommodating chamber
Permanent magnetism quadrupole electromagnet 6 cool down, to guarantee its job stability.
It is additionally provided with pressing ring 7 in drift tube main body 3, as shown in figure 3, pressing ring 7 is fixed in accommodating chamber, can be incited somebody to action by pressing ring 7
Permanent magnetism quadrupole electromagnet 6 (metamagnet skeleton is arranged with outside it) is pressed abd fixed on one end of the separate drift pipe end-cap 4 of accommodating chamber
Cavity wall on, i.e., permanent magnetism quadrupole electromagnet 6 is pressed on one end of separate drift pipe end-cap 4 of water jacket 5, guarantee permanent magnetism quadrupole magnetic
Iron 6 is fricton-tight in the central axial direction of accommodating chamber.Pass through spring and pressure compared to permanent magnetism quadrupole electromagnet 6 in existing drift tube
Piece is pressed abd fixed on the fixed form in drift pipe end-cap 4, and the present embodiment locks pressing ring 7 by installing pressing ring 7 additional in accommodating chamber
Tight metamagnet skeleton is simultaneously directly anchored in accommodating chamber, and then realizes permanent magnetism quadrupole electromagnet being fixed on drift tube main body 3
On, it is directly connected to nothing between pressing ring 7 and drift pipe end-cap 4, drift pipe end-cap 4 is avoided and is threadedly coupled with drift tube main body 3
Afterwards, it because the reaction force acts of pressure magnet 6 are the case where drifting about causes drift 4 screw thread of pipe end-cap to retract in pipe end-cap 4, fills
Divide and ensure that the reliability being threadedly coupled between drift tube main body 3 and drift pipe end-cap 4.
As shown in Figure 8 and Figure 9, in a ring, outside wall surface is equipped with external screw thread to pressing ring 7, and the inner wall of accommodating chamber is equipped with
Internal screw thread, pressing ring 7 can be matched with the internal screw thread in accommodating chamber by its external screw thread and be fixed in drift tube main body 3, in turn
Permanent magnetism quadrupole electromagnet 6 is pressed abd fixed in the cavity wall of one end of the separate drift pipe end-cap 4 of accommodating chamber.
Pressing ring 7 is equipped with threaded hole 71, by fastening screw 8 by directly being withstood on metamagnet skeleton after threaded hole 71,
Permanent magnetism quadrupole electromagnet 6 is locked, and then realizes that permanent magnetism quadrupole electromagnet 6 is fixed with 3 phase of drift tube main body.
Pressing ring 7 is preferably titanium alloy material, as long as can satisfy the higher requirement of no magnetic, good mechanical property, intensity
, specific material is not limited.
Specifically, when assembly, permanent magnetism quadrupole electromagnet 6 is put into the hollow receiver chamber in water jacket 5 first；Again by pressing ring 7
It is put into accommodating chamber, is mutually fixed by the external screw thread in the outside wall surface of pressing ring 7 with the screw-internal thread fit on the inner wall of water jacket 5,
And permanent magnetism quadrupole electromagnet 6 is pressed abd fixed on by pressing ring 7 in the cavity wall of one end of the separate drift pipe end-cap 4 of accommodating chamber；So
Afterwards, fastening screw 8 is further locked metamagnet skeleton (i.e. permanent magnetism quadrupole electromagnet 6) by the threaded hole 71 on pressing ring 7 solid
It is scheduled in the accommodating chamber of water jacket 5.
Optionally, drift tube further includes support rod 1, and support rod 1 is in hollow cylindrical, passes through electron beam welding and drift tube
3 phase of main body is fixed.As shown in Figure 4 and Figure 5, in the present embodiment, in drift tube main body 3 fixed (such as being fixed by electron beam welding)
There is point water column 2, support rod 1 is fixed on the upper end of point water column 2 by electron beam welding, and then realizes solid with 3 phase of drift tube main body
It is fixed.Specifically, the lower end of water column 2 will be divided to be fixed on the cylindrical outer wall face of drift tube main body 3 by electron beam welding first,
Then the lower end of support rod 1 is connected with the upper end of water column 2 is divided by electron beam welding, i.e., support rod 1 is located at and divides water column 2
Upper end, to achieve the purpose that support rod 1 is fixed with 3 phase of drift tube main body.
After completing being fixedly connected between drift tube main body 3 and support rod 1, with support rod 1 for benchmark centering, to drift tube
Main body 3 divides the outer dimension of water column 2 and support rod 1 to carry out repair, to guarantee that support rod 1 is vertically arranged, 3 water of drift tube main body
Flat setting, and the central axis of support rod 1 intersects with the central axis upright of drift tube main body 3.
Then, using the central axis of above-mentioned drift tube main body 3 as the internal diameter of the water jacket 5 in benchmark repair drift tube main body 3
Size is overlapped the central axis of accommodating chamber and the central axis of drift tube main body 3, further makes the central axis of support rod 1
Intersect with the central axis upright of accommodating chamber, to guarantee the intersection point of the central axis of support rod 1 and the central axis of accommodating chamber
It falls in the claimed range of the Geometric center coordinates of drift tube main body 3.
Existing drift tube is required with the connection of drift tube main body 3 and drift pipe end-cap 4 equipped with permanent magnetism quadrupole electromagnet 6
Body is that benchmark centering carrys out process support bar 1, and centering reference dimension is small at this time, and tooling requires high in process, and difficulty of processing is big；
Technical solution provided in this embodiment can be before the assembly of permanent magnetism quadrupole electromagnet 6 and drift tube main body 3 be connect with drift pipe end-cap 4
It is supported being welded and fixed for bar 1, not only can avoid interference of the magnet 6 to welding process, but also can be real with big support rod 1
Body is benchmark centering to process and assemble permanent magnetism quadrupole electromagnet 6, drift tube main body 3 and drift pipe end-cap 4, makes support rod, permanent magnetism
Quadrupole electromagnet 6, the machining accuracy of drift tube main body 3 and pipe end-cap 4 of drifting about and assembly precision improve, and processing and assembling process are more
Simply, processing cost is advantageously reduced, the processing efficiency of drift tube is improved.
The present invention also provides a kind of draft tube linacs including drift tube described above, by using drift
It is threadedly coupled between pipe main body 3 and drift pipe end-cap 4, improves the modular construction and process sequence of draft tube linac, make
Mechanical structure using the draft tube linac of permanent magnetism quadrupole electromagnet 6 simplifies, and processing and assembly difficulty reduce, and fully ensures that
The indices of draft tube linac.
The processing method of drift tube provided by the invention, comprising the following steps:
Step 1: preparatory processing drift tube main body 3 and drift pipe end-cap 4 retain machining allowance, by the drift tube main body 3
With water jacket 5, divide 2 phase of water column to fix, to obtain drift tube body assembly.
Specifically, firstly, the cylindrical shape and cylindrical cavity of preparatory processing drift tube main body 3 and pipe end-cap 4 of drifting about, are protected
Machining allowance is stayed, opens up first through hole 31 in one end of the separate drift pipe end-cap 4 of drift tube main body 3 respectively, in drift pipe end
The second through-hole 41 is opened up on the end face of lid 4；Then, the interior outer end face and interior outside of processing drift tube main body 3 and pipe end-cap 4 of drifting about
Wall surface.Specifically, when processing drift pipe end-cap 4, in order to guarantee the intensity of drift pipe end-cap 4, in the inner face of drift pipe end-cap 4
It is upper to form inwardly projecting collar flange 42, it avoids deforming in process, the wall thickness of the rest part for pipe end-cap 4 of drifting about
It is thinned, to mitigate weight, saves material cost；Then, the machining internal thread in the interior sidewall surface of drift pipe end-cap 4.
Then, preparatory processing divides water column 2, and according to divide the outer diameter of 2 lower end of water column in the cylindric of drift tube main body 3
Processing divides the mounting groove of water column 2 in outside wall surface；As shown in figure 3, according to the inner sidewall size of drift tube main body 3 and dividing under water column 2
The outer diameter at end processes water jacket 5, and on water jacket 5 and divides on the bottom end of water column 2 respectively and process 2 groups respectively for fixed company
Connect the cylinder pin hole of point water column 2 Yu water jacket 5；Then, water jacket 5 is fixed on to the inside of drift tube main body 3 by electron beam welding
To form accommodating chamber on wall；Followed by, as shown in Figure 4 and Figure 5, will divide 2 lower end of water column pass through drift tube main body 3 on mounting groove
Under extend to and matched with water jacket 5, and fixation divides the opposite position between 2 lower end of water column and water jacket 5 in advance by installing straight pin 9 additional
It sets, then water column 2 will be divided to be weldingly fixed on the mounting groove in drift tube main body 3 vertically, tentatively to complete drift tube main body group
The processing of part.It is pre-positioned by straight pin 9 convenient for dividing the electron beam welding of water column 2 to fix, raising divides water column 2 in drift tube master
Vertical welding precision on the cylindric outer side surface of body 3, and then guarantee the fixed precision of subsequent support rod 1.
Step 2: further, preparatory processing support rod retains machining allowance, by electron beam welding by the support rod
It is fixed on described divide on water column.
Specifically, preparatory processing support rod shape and inner cavity retain machining allowance, by electron beam welding by support rod 1
It is fixedly connected on the upper end of point water column 2, and guarantees that support rod 1 keeps vertical with water column 2 is divided.Divide one end of water column 2 vertical as a result,
It is fixed on the cylindric outer side surface of drift tube main body 3, the other end is connect vertically with the bottom end of support rod 1, to make to support
Bar 1 is fixed on vertically on the cylindrical outer wall face of drift tube main body 3.
Step 3: further, repair support rod 1 divides water column 2, drift tube main body 3 and water jacket 5, makes the center of support rod 1
Axis is conllinear with the central axis of water column 2 is divided, and the central axis upright phase of the central axis of support rod 1 and drift tube main body 3
It hands over, the central axis of the accommodating chamber in drift tube main body 3 is conllinear with the central axis of drift tube main body 3, and the center of support rod 1
Axis intersects with the central axis upright of accommodating chamber.
Specifically, firstly, according to welding deformation situation, repair drift tube main body 3 and the shape and internal diameter ruler for dividing water column 2
It is very little, keep 1 central axis of support rod conllinear with 2 central axis of water column is divided；Then, on the basis of support rod 1, repair drift tube main body
3 intersect the central axis of support rod 1 and the central axis upright of drift tube main body 3, i.e. the central axis of support rod 1, Fen Shui
The central axis of column 2 intersects with the central axis upright of drift tube main body 3.
Then, the position of above-mentioned drift tube main body 3 is fixed by tool, that is, keeps the central axis of drift tube main body 3
It is fixed, and using the central axis as the internal diameter of the water jacket 5 in benchmark repair drift tube main body 3, make the central axis of accommodating chamber
Line is overlapped with the central axis of drift tube main body 3, and then makes central axis upright phase of the central axis of support rod 1 with accommodating chamber
It hands over, to guarantee that the intersection point of the central axis of support rod 1 and the central axis of accommodating chamber falls in the geometric center of drift tube main body 3
In the claimed range of coordinate, and tentatively reaches drift tube main body 3, divides the shape of water column 2 and support rod 1 and the size of internal diameter and public affairs
Difference requires.Technical solution provided in this embodiment can be in the assembly of permanent magnetism quadrupole electromagnet 6 and drift tube main body 3 and drift pipe end-cap 4
It is supported the welding and repair of bar 1 before connection, not only can avoid inner magnet 6 and welding process is interfered, meanwhile, it can be at this
Cooled down in time to workpiece and chip removal in process using cutting fluid, preferably to control the roughness of workpiece,
Welding deformation is reduced, the machining accuracy of drift tube is improved.
Step 4: further, to avoid causing early period true because support rod 1 finally just connects in place in the prior art
The case where sky detection air-tightness, final structure leak, can be in advance to completed in the process of the present embodiment
Support rod 1 divides water column 2, drift tube main body 3, the connection structure of water jacket 5 to carry out vacuum detecting, it is ensured that completed connection structure
Complete and air-tightness is good, improves the yields of workpiece entirety, and cost is reprocessed in reduction.
Step 5: further, being floated as shown in figure 3, permanent magnetism quadrupole electromagnet 6 (being arranged with metamagnet skeleton outside) is packed into
It moves in the hollow receiver chamber in pipe main body 3, is then packed into pressing ring 7, but first in the inner sidewall of water jacket 5 before being packed into pressing ring 7
Machining internal thread on face (i.e. the cavity wall of accommodating chamber), in the cavity wall by external screw thread and accommodating chamber on the outer side surface of pressing ring 7
Screw-internal thread fit, make pressing ring 7 that permanent magnetism quadrupole electromagnet 6 to be pressed abd fixed on to one end of the separate drift pipe end-cap 4 of accommodating chamber
In cavity wall.Then, fastening screw 8 is locked into the metamagnet being arranged outside permanent magnetism quadrupole electromagnet 6 by the threaded hole 71 on pressing ring 7
Skeleton, so that permanent magnetism quadrupole electromagnet 6 is fixed in accommodating chamber.
Since the central axis of support rod 1 intersects with the central axis upright of accommodating chamber in step 2, support rod 1
The central axis of central axis and the permanent magnetism quadrupole electromagnet 6 for being packed into accommodating chamber also intersects vertically；Not only make magnetic by the fixation of pressing ring 7
6 uniform force of iron is steadily fixed, and guarantees that nothing is directly connected between pressing ring 7 and drift pipe end-cap 4, avoids drift pipe end
After lid 4 is threadedly coupled with drift tube main body 3, because the reaction force acts of pressure permanent magnetism quadrupole electromagnet 6 cause in drift pipe end-cap 4
The case where drift 4 screw thread of pipe end-cap retracts has fully ensured that and has been threadedly coupled between drift tube main body 3 and drift pipe end-cap 4
Reliability.
In addition, 6 post-processing support rod 1 of permanent magnetism quadrupole electromagnet is initially charged with compared to existing drift tube, in the present embodiment
Processing sequence be that permanent magnetism quadrupole electromagnet 6 is packed into drift tube main body 3 on the basis of support rod 1 so that permanent magnetism quadrupole electromagnet 6
Assembly precision is higher.
Step 6: further, processing is outer in the outside wall surface of the one end of drift tube main body 3 cooperated with drift pipe end-cap 4
Screw thread makes the screw-internal thread fit on external screw thread and drift pipe end-cap 4 in drift tube main body 3 using tool with constant moment, real
The threaded connection of existing drift tube main body 3 and drift pipe end-cap 4, and guarantee that the central axis of first through hole 31 and second leads to as far as possible
The central axis in hole 41 is conllinear.
Step 7: further, survey magnetic being carried out to the entirety that above-mentioned assembly is completed, that is, utilizes a kind of vibration of fixed magnet
Dynamic silk magnetic center measuring device and method (the specific specification part that it is CN201710354648.2 that please refer to Patent Application)
The magnetic center coordinate of permanent magnetism quadrupole electromagnet 6 is measured, to ensure that the magnetic center coordinate of permanent magnetism quadrupole electromagnet 6 of the measurement falls in drift
In the claimed range of the Geometric center coordinates of pipe main body 3, meet the required precision of magnetic center data.
According to survey magnetic as a result, if it exists magnetic center deviate, can according to offset to drift tube main body 3, divide water column 2 and support
The shape and internal diameter of bar 1 carry out micro repair, to meet magnetic center data precision requirement.
Step 8: further, the comprehensive centering on the basis of drift tube main body 3 and support rod 1, with reference to magnetic center data,
To support rod 1, water column 2, drift tube main body 3, the shape for pipe end-cap 4 of drifting about is divided to carry out repair, and by support rod 1 and divide water column 2
It finishes in place, the magnetic center for guaranteeing support rod 1 and the central axis of water column 2 being divided to cross magnet 6, and meets support rod 1 and Fen Shui
The size requirement of column 2.
After up to standard, keyway and target ball hole on process support bar 1, to complete the structured processing of 1 institute of support rod.
Step 9: further, with support rod 1 for benchmark centering, drift pipe end-cap 4 and drift tube main body 3 being carried out most
Whole finishing.Specifically, firstly, 4 blind holes 10 on the cylindric outer side surface of drift tube main body 3 are processed, such as Fig. 4 institute
Show；Then, drift tube main body 3 is processed into the conical surface with the mutually separate both ends of the surface of drift pipe end-cap 4, cutter squeezes when processing the conical surface
Drift tube main body 3 and drift pipe end-cap 4 are pressed, the threaded connection for making drift tube main body 3 between pipe end-cap 4 of drifting about is further tight
Gu；Finally, being finished the contour structures of drift tube main body 3 and drift pipe end-cap 4 (such as to drift tube main body 3 and drift
Outer side surface, inclined-plane, fillet, first through hole 31 and the second through-hole 41 of pipe end-cap 4 are finished), to guarantee any surface finish
Degree, improves the machining accuracy of drift tube.
In conclusion the drift tube that the above embodiment of the present invention provides, by using drift tube main body and drift pipe end
It is threadedly coupled between lid, adds pressing ring and permanent magnetism level Four magnet is pressed abd fixed in the intracorporal accommodating chamber of drift tube master, so that plus
When work drift tube, it is packed into permanent magnetism quadrupole electromagnet after can first welding support rod, repair drift tube main body is carried out on the basis of support rod
Outer dimension and assembly permanent magnetism quadrupole electromagnet, reduce the difficulty of processing of drift tube main body, permanent magnetism quadrupole electromagnet assembly precision
It is higher, it effectively reduces and surveys magnetic number, and then make that the processing of drift tube is simpler, cost is lower, precision is higher, improve drift tube
Reliability and workpiece entirety yields.
Although disclosed herein embodiment it is as above, the content only for ease of understanding the present invention and use
Embodiment is not intended to limit the invention.Technical staff in any fields of the present invention is taken off not departing from the present invention
Under the premise of the spirit and scope of dew, any modification and variation, but the present invention can be carried out in the form and details of implementation
Scope of patent protection, the appended claims that must still be subject to defined.
Claims (8)
1. a kind of drift tube, comprising: drift tube body assembly and drift pipe end-cap, the drift tube body assembly includes drift tube
Main body, the drift pipe end-cap are fixed on one end of the drift tube main body, it is characterised in that: one end of the drift tube main body
It is threadedly coupled with the drift pipe end-cap.
2. drift tube according to claim 1, it is characterised in that: it further include permanent magnetism quadrupole electromagnet, the drift tube main body
Interior to have accommodating chamber, the permanent magnetism quadrupole electromagnet is set in the accommodating chamber, and pressing ring, the pressing ring are fixed in the accommodating chamber
The permanent magnetism quadrupole electromagnet is pressed abd fixed in the cavity wall of one end far from the drift pipe end-cap of the accommodating chamber.
3. drift tube according to claim 2, it is characterised in that: the pressing ring and the cavity wall screw thread of the accommodating chamber connect
It connects.
4. drift tube according to claim 2, it is characterised in that: the pressing ring is equipped with threaded hole, and fastening screw passes through
The threaded hole simultaneously compresses the permanent magnetism quadrupole electromagnet.
5. drift tube described in any one of -4 according to claim 1, it is characterised in that: it further include support rod, the support rod
It is mutually fixed between the drift tube body assembly by electron beam welding.
6. a kind of draft tube linac, it is characterised in that: including drift tube according to any one of claims 1 to 5.
7. a kind of processing method of drift tube characterized by comprising
Preparatory processing drift tube main body and drift pipe end-cap, retain machining allowance, by the drift tube main body and water jacket, divide water column
It is mutually fixed, to obtain the drift tube body assembly；
Preparatory processing support rod retains machining allowance, and the support rod is fixed on described divide on water column by electron beam welding；
Support rod described in repair, it is described divide water column, the drift tube main body and the water jacket, make the central axis of the support rod
It is conllinear with the central axis for dividing water column, and the central axis of the support rod and the central axis of the drift tube main body hang down
Straight intersection, the central axis of the intracorporal accommodating chamber of drift tube master are conllinear with the central axis of the drift tube main body；
The air-tightness of the support rod, the connection structure for dividing water column, the drift tube main body and the water jacket is detected, to protect
It demonstrate,proves the inside of the connection structure and is welded to connect region No leakage；
Permanent magnetism quadrupole electromagnet is assemblied in the intracorporal accommodating chamber of drift tube master；
The threading in the drift tube main body, and the drift tube main body and the drift pipe end-cap are threadedly coupled；
The magnetic center of the permanent magnetism quadrupole electromagnet is measured using the vibrating-wire magnetic center measuring device and method of a kind of fixed magnet
Coordinate, to ensure that the magnetic center coordinate of the permanent magnetism quadrupole electromagnet falls in the requirement of the Geometric center coordinates of the drift tube main body
In range；
Comprehensive centering finishes the support with reference to magnetic center data on the basis of the drift tube main body and the support rod
Bar and it is described divide water column in place, guarantee that the support rod and the central axis for dividing water column cross magnetic center, and the support rod
It is met the requirements with the size for dividing water column；
Using the support rod as benchmark centering, the drift tube main body and the drift pipe end-cap are finished, the drift tube is made
Main body and the drift pipe end-cap meet size, smoothness requirements.
8. the processing method of drift tube according to claim 7, which is characterized in that before being packed into the permanent magnetism quadrupole electromagnet
Drift tube main body, the support rod described in repair, the water jacket and it is described divide cutting fluid is used during water column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711276540.2A CN109874222B (en) | 2017-12-06 | 2017-12-06 | Drift tube, drift tube linear accelerator and drift tube processing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711276540.2A CN109874222B (en) | 2017-12-06 | 2017-12-06 | Drift tube, drift tube linear accelerator and drift tube processing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110549064A (en) * | 2019-06-18 | 2019-12-10 | 上海克林技术开发有限公司 | Buncher tool |
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| CN109874222B (en) | 2022-10-25 |
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