Positioning tool and positioning method

Abstract

The invention discloses a positioning tool and a positioning method.The positioning tool comprises a first supporting piece and a second supporting piece which are arranged in a crossed mode, the bottom edge of the first supporting piece is connected with one side edge of the second supporting piece, and a clamping hole used for positioning a flange is formed in the first supporting piece; the supporting plate is arranged at the top of the second supporting piece, a sliding groove is formed in the top of the supporting plate, and the sliding groove extends in the first direction; the mounting base is mounted in the sliding groove, and the top of the mounting base is used for positioning the first component, so that the central axis of the straight section part coincides with the central axis of the central supporting pipe; the supporting seat is installed in the sliding groove, the supporting seat is located between the installation seat and the first supporting piece in the first direction, and the top of the supporting seat is used for supporting the center supporting pipe so that the central axis of the center supporting pipe can coincide with the central axis of the flange.

Description

Technical Field

[0001] The present invention relates to the technical field of positioning tooling, and in particular to a positioning tooling and a positioning method. Background Art

[0002] The buncher is one of the important components of the accelerator, and the drift tube 1 is the core component of the buncher. The specific structure of the drift tube 1 is shown in Attachments 3 and 4, which includes a flange 2, a central support tube 3 and a first component 4 connected in sequence. The first component 4 includes a circular ring portion 41, and the outer wall of the circular ring portion 41 extends outward to form a straight section 42. The central support tube 3 is a conical tube, and its large end is connected to the flange 2 in an aligned manner, and its small end is connected to the straight section 42 of the first component 4 in an aligned manner.

[0003] During operation, the beam passes through the center hole of the annular portion 41 of the first component 4, and the drift tube 1 is continuously cooled by deionized water. The cooling water enters from the water inlet pipe at the flange 2, passes through the central support tube 3, and then enters the straight section 42 of the first component 4, circulates along the inner wall of the annular portion 41 of the first component 4, and then passes through the straight section 42 of the first component 4, the central support tube 3, and the flange 2, and finally is discharged from the drain port of the flange 2. The welding process of the drift tube 1 requires that the central axis of the central support tube 3 and the central axis of the flange 2 be kept coincident, and be perpendicular to the central axis of the annular portion 41 of the first component 4, the first end of the central support tube 3 contacts the center point of the flange 2, and a brazing material is placed at the contact position of the two for brazing; the central axis of the straight section 42 of the first component 4 and the central axis of the central support tube 3 are kept coincident, the small end of the central support tube 3 contacts the straight section 42 of the first part, and a brazing material is placed at the contact position of the two for brazing, so as to connect the flange 2, the central support tube 3 and the first component 4 to form the drift tube 1.

[0004] The drift tube 1 has high requirements for shape and position accuracy. However, since most of the components are made of oxygen-free copper and the central support tube 3 is thin and long, it is very easy to deform during assembly, process transfer and high-temperature brazing. However, there is no positioning tooling for positioning it in the prior art, so the obtained drift tube 1 cannot meet the design requirements. Summary of the invention

[0005] The purpose of the present invention is to provide a positioning tool and a positioning method, which can improve the shape and position accuracy of the welded drift tube after positioning the drift tube assembly and meet the design requirements.

[0006] In order to achieve the above-mentioned object, the present invention provides a positioning tool for positioning a drift tube so that the flange, the central support tube and the first component of the drift tube are connected in sequence, and the first component includes a circular ring part and a straight section part connected in sequence. The positioning tool includes: A first support member and a second support member are arranged to intersect each other, a bottom edge of the first support member is connected to a side edge of the second support member, and a positioning hole for positioning the flange is provided on the first support member; A support plate, the support plate is arranged on the top of the second support member, a slide groove is formed on the top of the support plate, and the slide groove extends along the first direction; A mounting seat, the mounting seat is mounted in the slide groove, and the top of the mounting seat is used to position the first component so that the central axis of the straight section coincides with the central axis of the central support tube; A support seat is installed in the slide groove, and the support seat is located between the mounting seat and the first support member in a first direction. The top of the support seat is used to support the central support tube so that the central axis of the central support tube coincides with the central axis of the flange.

[0007] Preferably, the first support member includes a vertical plate and a positioning frame, the positioning frame and the second support member are arranged to intersect, the bottom edge of the positioning frame is connected to a side edge of the second support member, the vertical plate includes a first surface and a second surface opposite to each other, the first surface is attached to the side of the positioning frame away from the second support member, the vertical plate is provided with the positioning hole, the positioning hole includes a coaxial positioning groove and a through hole, the notch of the positioning groove penetrates to the second surface, the through hole penetrates from the bottom of the positioning groove to the first surface, and the diameter of the through hole is smaller than the diameter of the positioning groove; The flange includes a first disc and a second disc coaxially connected, the diameter of the first disc is larger than the diameter of the second disc, the diameter of the positioning groove is the same as the diameter of the second disc, the depth value of the positioning groove is the same as the thickness value of the second disc, and the positioning groove is used to position the second disc.

[0008] Preferably, a positioning pin is provided on the second surface of the vertical plate, and the positioning pin is used to be plugged into the positioning hole on the first disk.

[0009] Preferably, a mounting groove is provided on the second surface of the vertical plate, and the positioning tool further comprises: A fastener is used to be inserted into the fastening hole on the first disk and the mounting groove in sequence.

[0010] Preferably, an arc-shaped groove is provided on the support seat, the notch of the arc-shaped groove passes through the top of the support seat, and the two ends of the arc-shaped groove in the first direction respectively pass through the two side surfaces of the support seat in the first direction, and the arc-shaped groove is used to support the central support tube.

[0011] Preferably, a plurality of the support seats are provided, and the plurality of the support seats are sequentially installed in the slide groove along the first direction.

[0012] Preferably, a plurality of first fixing holes distributed along a first direction are provided at the bottom of the slide groove, and both the support seat and the mounting seat can slide in the slide groove, and both the support seat and the mounting seat are provided with second fixing holes passing through the upper and lower parts, and both the support seat and the mounting seat are fixed to the slide groove by fixing parts passing through the corresponding first fixing holes and the second fixing holes.

[0013] Preferably, a locking groove is provided on the top of the mounting seat, and the positioning tool further comprises: A compression cover, wherein a locking hole is provided on the compression cover and the compression cover is used to cover the top of the circular ring portion; A locking piece is used to be inserted into the locking hole, the center hole of the annular part and the locking groove in sequence.

[0014] Preferably, the positioning frame and the second support member are both made of square steel.

[0015] The present invention provides a positioning method for positioning a drift tube, using any of the above positioning tools, comprising the following steps: Install the flange in the positioning hole of the first support member, install the center support tube on the top of the support seat, install the first component on the top of the mounting seat, make the central axis of the center support tube, the central axis of the straight section and the central axis of the flange coincide, and complete the positioning.

[0016] Compared with the prior art, the positioning tool and positioning method according to the embodiment of the present invention have the following beneficial effects: A first support member and a second support member are arranged to intersect each other, the bottom edge of the first support member is connected to a side edge of the second support member, and a positioning hole for positioning the flange is opened on the first support member, and the flange is installed in the positioning hole for positioning.

[0017] A support plate is arranged on the top of the second support member, and a support seat and a mounting seat are installed in a slide groove opened on the top of the support plate. The central support tube is installed on the top of the support seat, and the first component is installed on the top of the mounting seat, so that the central axis of the central support tube, the central axis of the straight section and the central axis of the flange coincide with each other to complete the positioning, so that the welded drift tube has high shape and position accuracy and can meet the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a positioning tool according to an embodiment of the present invention; Figure 2 It is a structural schematic diagram of the drift tube according to an embodiment of the present invention installed on a positioning tool; Figure 3 is a schematic structural diagram of a drift tube according to an embodiment of the present invention; Figure 4 is a schematic structural diagram of a drift tube according to another embodiment of the present invention; Figure 5 is a structural schematic diagram of a positioning tool according to another embodiment of the present invention; In the figure, 1, drift tube; 2, flange; 21, first disc; 211, positioning hole; 212, fastening hole; 22, second disc; 3, center support tube; 4, first component; 411, annular portion; 4111, center hole; 42, straight section; 5, first support member; 51, positioning frame; 6, second support member; 7, vertical plate; 71, positioning hole; 711, positioning groove; 712, through hole; 72, First surface; 73, second surface; 74, positioning pin; 75, mounting groove; 8, support plate; 81, slide groove; 811, first fixing hole; 9, mounting seat; 91, locking groove; 10, support seat; 101, arc groove; 11, fastener; 12, second fixing hole; 13, fixing piece; 14, clamping cover; 1411, locking hole; 15, locking piece; 16, support column; 17, supporting square steel; 18, bottom plate. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] In the description of the present invention, it should be understood that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0021] In the description of the present invention, it should be understood that the terms "first", "second" and "third" used in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal", "X-axis direction", "Y-axis direction", "Z-axis direction" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. Moreover, in addition to being used to indicate orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0022] like Figure 1-5 As shown, a positioning fixture of an embodiment of the present invention is used to position a drift tube 1 so that the flange 2, the central support tube 3 and the first component 4 of the drift tube 1 are connected in sequence, and the first component 4 includes a circular ring portion 41 and a straight section portion 42 connected in sequence. The positioning fixture includes: a first support member 5 and a second support member 6 arranged in an intersecting manner, a support plate 8, a support seat 10 and a mounting seat 9; The bottom edge of the first support member 5 is connected to one side edge of the second support member 6, and a positioning hole 71 for positioning the flange 2 is provided on the first support member 5; The support plate 8 is disposed on the top of the second support member 6. A slide groove 81 is provided on the top of the support plate 8. The slide groove 81 extends along the first direction X. The mounting seat 9 is installed in the slide groove 81, and the top of the mounting seat 9 is used to position the first component 4 so that the central axis of the straight section 42 coincides with the central axis of the central support tube 3; The support seat 10 is installed in the slide groove 81. The support seat 10 is located between the mounting seat 9 and the first support member 5 in the first direction X. The top of the support seat 10 is used to support the central support tube 3 so that the central axis of the central support tube 3 coincides with the central axis of the flange 2.

[0023] It should be noted that a first support member 5 and a second support member 6 are arranged to intersect each other, the bottom edge of the first support member 5 is connected to a side edge of the second support member 6, and a positioning hole 71 for positioning the flange is opened on the first support member 5, and the flange 2 is installed in the positioning hole 71 for positioning.

[0024] A support plate 8 is arranged on the top of the second support member 6, and a support seat 10 and a mounting seat 9 are installed in a slide groove 81 opened on the top of the support plate 8. The central support tube 3 is installed on the top of the support seat 10, and the first component 4 is installed on the top of the mounting seat 9, so that the central axis of the central support tube 3, the central axis of the straight section 42 and the central axis of the flange 2 coincide with each other, and the positioning is completed, so that the shape and position accuracy of the welded drift tube is high and can meet the design requirements.

[0025] The central support tube 3 is a slender oxygen-free copper conical tube. When the shape of the central support tube 3 changes, the shape and height of the support seat 10 can be further adjusted so that the central axis of the central support tube 3 supported by the support seat 10 coincides with the central axis of the flange 2.

[0026] like Figure 1-5 As shown, in a more specific embodiment, the first support member 5 includes a vertical plate 7 and a positioning frame 51, the positioning frame 51 and the second support member 6 are arranged to intersect, the bottom edge of the positioning frame 51 is connected to a side edge of the second support member 6, the vertical plate 7 includes a first surface 72 and a second surface 73 opposite to each other, the first surface 72 is attached to the side of the positioning frame 51 away from the second support member 6, and a positioning hole 71 is opened on the vertical plate 7, the positioning hole 71 includes a coaxial positioning groove 711 and a through hole 712, the notch of the positioning groove 711 penetrates to the second surface 73, the through hole 712 penetrates from the bottom of the positioning groove 711 to the first surface 72, and the diameter of the through hole 712 is smaller than the diameter of the positioning groove 711; The flange 2 includes a first disc 21 and a second disc 22 that are coaxially connected. The diameter of the first disc 21 is larger than the diameter of the second disc 22. The diameter of the positioning groove 711 is the same as the diameter of the second disc 22. The depth value of the positioning groove 711 is the same as the thickness value of the second disc 22. The positioning groove 711 is used to position the second disc 22.

[0027] It should be noted that, in general, the positioning frame 51 and the second support member 6 are perpendicular to each other, so that the vertical plate 7 and the second support member 6 installed on the positioning frame 51 are perpendicular to each other, the positioning hole 71 is vertically opened on the vertical plate 7, the flange 2 is installed in the positioning hole 71 for positioning, the flange 2 and the second support member 6 are perpendicular to each other, the center axis of the flange 2 and the second support member 6 are parallel to each other, so that the second support member 6 is placed on a horizontal plane, the height and shape of the support seat 10 are adapted to the corresponding position of the supported central support tube 3, the central support tube 3 is installed on the support seat 10, and it is ensured that the center axis of the central support tube 3 is in a horizontal line and the center axis of the central support tube 3 coincides with the center axis of the flange 2. The height of the mounting seat 9 is adapted to the height of the support seat 10, the first component 4 is installed on the mounting seat 9, and it is ensured that the center axis of the straight section 42 of the first component 4 coincides with the center axis of the central support tube 3, the mounting seat 9 is horizontal, and thus the first component 4 installed on the mounting seat 9 is also horizontal.

[0028] like Figure 1 As shown, in a more specific embodiment, the second support member 6 includes a base (not shown in the figure) and a support column 16, one side of the base is connected to the bottom edge of the positioning frame 51, the support column 16 is installed on the top of the base, and the support plate 8 is arranged on the top of the support column 16.

[0029] The positioning hole 71 includes a coaxial positioning groove 711 and a through hole 712. The groove of the positioning groove 711 extends to the second surface 73, and the through hole 712 extends from the bottom of the positioning groove 711 to the first surface 72. The diameter of the through hole 712 is smaller than the diameter of the positioning groove 711, so that a step surface is formed at the connection between the positioning groove 711 and the through hole 712. Since the positioning groove 711 and the second disk 22 have the same diameter, the depth value of the positioning groove 711 and the thickness value of the second disk 22 are the same. Therefore, the second disk 22 can be inserted into the positioning groove 711 to achieve positioning, thereby ensuring the stability of the positioning of the flange 2 and ensuring that the flange 2 and the vertical plate 7 are parallel.

[0030] like Figure 1 , 3 As shown, in a more specific embodiment, a positioning pin 74 is provided on the second surface 73 of the vertical plate 7 , and the positioning pin 74 is used to be plugged into the positioning hole 211 on the first disk 21 .

[0031] It should be noted that a positioning pin 74 is installed on the second surface 73 of the vertical plate 7, and a positioning hole 211 is opened on the first disk 21 of the flange 2, so that the positioning hole 211 on the first disk 21 of the flange 2 is aligned with the corresponding positioning pin 74 on the second surface 73 of the vertical plate 7, so that the positioning pin 74 is inserted into the positioning hole 211, so that the second disk 22 of the flange 2 can also be more smoothly and fittingly inserted into the positioning groove 711.

[0032] like Figure 1 , 3 As shown, in a more specific embodiment, a mounting groove 75 is provided on the second surface 73 of the vertical plate 7, and the positioning tool further comprises: The fastener 11 is used to be inserted into the fastening hole 212 and the mounting groove 75 on the first disk 21 in sequence.

[0033] It should be noted that the fastening hole 212 on the first disk 21 of the flange 2 is aligned with the corresponding mounting groove 75 on the second surface 73 of the vertical plate 7, and the fastener 11 is inserted into the fastening hole 212 and the mounting groove 75 in sequence, thereby tightly fixing the flange 2 and the vertical plate 7, ensuring the stability of the positioning of the flange 2.

[0034] like Figure 1As shown, in a more specific embodiment, an arc-shaped groove 101 is opened on the support seat 10, and the notch of the arc-shaped groove 101 passes through the top of the support seat 10, and the two ends of the arc-shaped groove 101 in the first direction X respectively pass through the two side surfaces of the support seat 10 in the first direction X, and the arc-shaped groove 101 is used to support the central support tube 3.

[0035] It should be noted that an arc groove 101 is provided on the support seat 10 and extends to the top, and the two ends of the arc groove 101 in the first direction X respectively penetrate the two end surfaces of the support seat 10 in the first direction X. Since the central support tube 3 is a tapered tube, the arc groove 101 can support the central support tube 3 more closely and ensure the stability of the position of the central support tube 3.

[0036] Since there may be errors in the shape of the arc groove 101, in order to ensure that the arc groove 101 fits tightly against the central support tube 3, the relative position between the central support tube 3 and the support seat 10 can be adjusted (i.e., the position of the support seat 10 in the slide groove 81 is adjusted).

[0037] like Figure 1 As shown, in a more specific embodiment, a plurality of support seats 10 are provided, and the plurality of support seats 10 are sequentially installed in the slide groove 81 along the first direction X.

[0038] It should be noted that multiple support seats 10 are installed in the slide groove 81 in sequence along the first direction X. The heights and shapes of the multiple support seats 10 are adapted to the corresponding parts of the central support tube 3. The central support tube 3 is supported by multiple support seats 10, which can better lift the central support tube 3 to reduce its deformation during brazing.

[0039] like Figure 1 , 5 As shown, in a more specific embodiment, a plurality of first fixing holes 811 distributed along the first direction X are provided at the bottom of the slide groove 81, and both the support seat 10 and the mounting seat 9 can slide in the slide groove 81, and both the support seat 10 and the mounting seat 9 are provided with second fixing holes 12 that pass through the upper and lower parts, and both the support seat 10 and the mounting seat 9 are fixed to the slide groove 81 through the corresponding first fixing holes 811 and the second fixing holes 12 by the fixing members 13.

[0040] It should be noted that the support seat 10 and the mounting seat 9 can slide and move in the slide groove 81 to achieve fine-tuning of the position. The central support tube 3 is placed on the support surface of the support seat 10, and the positions of the support seat 10 and the mounting seat 9 are adjusted until the central axis of the central support tube 3, the central axis of the straight section 42 of the first component 4 and the central axis of the flange 2 coincide. At the same time, the central axis of the annular portion 41 of the first component is perpendicular to the central axis of the central support tube 3. Then, the fixing piece 13 is passed through the corresponding second fixing hole 12 and a first fixing hole 811 on the slide groove 81 to achieve fixation, and the support seat 10 and the mounting seat 9 are fixed on the support plate 8.

[0041] After the three components of the drift tube 1 are assembled and securely positioned and fixed with the tooling, the whole is placed in a vacuum brazing furnace for welding.

[0042] like Figure 2 As shown, in a more specific embodiment, a locking groove 91 is provided on the top of the mounting seat 9, and the positioning tool further includes: a pressing cover 14 and a locking member 15; The pressing cover 14 is provided with a locking hole 1411, and the pressing cover 14 is used to cover the top of the annular portion 41; The locking member 15 is used to be inserted into the locking hole 1411 , the central hole 411 of the annular portion 41 , and the locking groove 91 in sequence.

[0043] It should be noted that the locking hole 1411, the center hole 411 of the annular portion 41 and the locking groove 91 are coaxial. The clamping cover 14 is covered on the top of the annular portion 41, and the locking piece 15 is inserted into the locking hole 1411, the center hole 411 of the annular portion 41 and the locking groove 91 in sequence, thereby fixing the position of the clamping cover 14, the first component 4 and the mounting seat 9 to prevent the first component 4 from detaching from the mounting seat 9.

[0044] The locking member 15 is preferably a locking bolt, which includes a screw and a nut. The screw is inserted into the locking hole 1411, the center hole 411 of the annular portion 41 and the locking groove 91 in sequence, and the nut is sleeved on the screw and rests against the top of the pressing cover 14.

[0045] like Figure 1 As shown, in a more specific embodiment, the positioning frame 51 and the second support member 6 are both made of square steel.

[0046] It should be noted that the materials used for the positioning frame 51 and the second support member 6 are both square steel, which has good rigidity and strength.

[0047] like Figure 1As shown, the positioning frame 51 is a rectangular frame composed of 4 square steels. The base of the second support member 6 also includes a rectangular frame composed of 4 square steels, one of which is shared by the positioning frame 51. The base is also provided with supporting square steels 17 arranged at intervals along the first direction X and extending along the second direction Y, and a bottom plate 18 is also provided at the bottom of the supporting square steels 17, wherein the second direction Y and the first direction X are perpendicular to each other, and the support column 16 is installed on the top of the supporting square steel 17.

[0048] like Figure 1-5 As shown, a positioning method according to an embodiment of the present invention is used to position a drift tube 1, using any of the positioning tools described above, and includes the following steps: Install the flange 2 in the positioning hole 71 of the first support member 5, install the center support tube 3 on the top of the support seat 10, and install the first component 4 on the top of the mounting seat 9, so that the central axis of the center support tube 3, the central axis of the straight section 42 and the central axis of the flange 2 coincide with each other to complete the positioning.

[0049] It should be noted that the center support tube 3 is placed on the support surface of the support seat 10, and the end face of the circular ring part 41 of the first component is placed on the upper plane of the mounting seat 9. The positions of the support seat 10 and the mounting seat 9 are adjusted until the central axis of the center support tube 3, the central axis of the straight section 42 of the first component 4 and the central axis of the flange 2 coincide. At the same time, the central axis of the circular ring part 41 of the first component is perpendicular to the central axis of the center support tube 3. Then, the support seat 10 and the mounting seat 9 are fixed on the support plate 8 to complete the positioning.

[0050] It should be noted that, before brazing the components of the drift tube 1 (flange 2, center support tube 3 and first component 4), the present application needs to first test-install the components of the drift tube 1 on the positioning fixture, check that all dimensions and precision of the components are correct, then disassemble the components of the drift tube 1 in the reverse order of installation and then formally install them. After the formal installation is completed, check again that all dimensions and precision of the components are correct, then place brazing material at the contact position between the flange 2 and the center support tube 3, and at the contact position between the center support tube 3 and the first component 4, and then enter the brazing furnace for welding.

[0051] The processing process of the positioning fixture of the present application is as follows: the positioning frame 51 and the second support member 6 are welded together and then annealed to remove welding stress, and then the positioning hole 71, positioning pin 74 and installation groove 75 of the vertical plate 7 are processed. The positioning hole 71 of the vertical plate 7 is vertically opened on the vertical plate 7, and the bottom plate 18 of the second support member 6 is processed. The vertical plate 7 and the bottom plate 18 of the second support member 6 are clamped and processed once to ensure that the vertical plate 7 and the bottom plate 18 of the second support member 6 are vertical. At the same time, the slide groove 81 and the first fixing hole 811 of the support plate 8 are processed.

[0052] Before positioning the components of the drift tube 1 , it is necessary to recheck the verticality of the vertical plate 7 and the bottom plate 18 of the second support member 6 .

[0053] In a more specific embodiment, the flange 2 is installed and positioned in the positioning hole 71 of the vertical plate 7, specifically: the second disk 22 of the flange 2 is inserted into the positioning groove 711, the positioning hole 211 on the first disk 21 of the flange 2 is aligned with the positioning pin 74 on the second surface 73 of the vertical plate 7, the positioning pin 74 is inserted into the positioning hole 211, the fastening hole 212 on the first disk 21 of the flange 2 is aligned with the installation groove 75 on the second surface 73 of the vertical plate 7, and the fastener 11 is inserted into the fastening hole 212 on the first disk 21 of the flange 2 and the installation groove 75 on the second surface 73 of the vertical plate 7 in sequence, so that the flange 2 is installed and positioned in the positioning hole 71 of the vertical plate 7.

[0054] In a more specific embodiment, the central support tube 3 is installed on the top of the support seat 10 , specifically, the central support tube 3 is inserted into the arc groove 101 of the support seat 10 for installation.

[0055] In a more specific embodiment, the first component 4 is installed on the top of the mounting seat 9, specifically: the annular portion 41 of the first component 4 is placed on the top of the mounting seat 9, the clamping cover 14 is covered on the top of the annular portion 41, and the locking piece 15 is inserted into the locking hole 1411, the center hole 411 of the annular portion 41 of the first component 4 and the locking groove 91 in sequence, thereby installing the first component 4 on the upper plane of the mounting seat 9.

[0056] The working process of the present invention is: the flange 2 is installed in the positioning hole 71 of the first support member 5, the center support tube 3 is installed on the top of the support seat 10, and the first component 4 is installed on the top of the mounting seat 9, so that the central axis of the center support tube 3, the central axis of the straight section 42 and the central axis of the flange 2 coincide with each other to complete the positioning.

[0057] In summary, the embodiments of the present invention provide a positioning tool and a positioning method, which can improve the shape and position accuracy of the welded drift tube after positioning the drift tube assembly and meet the design requirements.

[0058] 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 and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A positioning tool for positioning a drift tube, so that the flange, the central support tube and the first component of the drift tube are connected in sequence, the first component includes a circular ring part and a straight section part connected in sequence, characterized in that: The positioning tooling includes: A first support member and a second support member are arranged to intersect each other, a bottom edge of the first support member is connected to a side edge of the second support member, and a positioning hole for positioning the flange is provided on the first support member; A support plate, the support plate is arranged on the top of the second support member, a slide groove is formed on the top of the support plate, and the slide groove extends along the first direction; A mounting seat, the mounting seat is mounted in the slide groove, and the top of the mounting seat is used to position the first component so that the central axis of the straight section coincides with the central axis of the central support tube; A support seat is installed in the slide groove, and the support seat is located between the mounting seat and the first support member in a first direction. The top of the support seat is used to support the central support tube so that the central axis of the central support tube coincides with the central axis of the flange.

2. The positioning tool according to claim 1, characterized in that: The first support member includes a vertical plate and a positioning frame, the positioning frame and the second support member are arranged to intersect, the bottom edge of the positioning frame is connected to a side edge of the second support member, the vertical plate includes a first surface and a second surface opposite to each other, the first surface is attached to the side of the positioning frame away from the second support member, the vertical plate is provided with the positioning hole, the positioning hole includes a coaxial positioning groove and a through hole, the notch of the positioning groove penetrates to the second surface, the through hole penetrates from the bottom of the positioning groove to the first surface, and the diameter of the through hole is smaller than the diameter of the positioning groove; The flange includes a first disc and a second disc coaxially connected, the diameter of the first disc is larger than the diameter of the second disc, the diameter of the positioning groove is the same as the diameter of the second disc, the depth value of the positioning groove is the same as the thickness value of the second disc, and the positioning groove is used to position the second disc.

3. The positioning tool according to claim 2, characterized in that: A positioning pin is provided on the second surface of the vertical plate, and the positioning pin is used to be plugged into the positioning hole on the first disc.

4. The positioning tool according to claim 3, characterized in that: A mounting groove is provided on the second surface of the vertical plate, and the positioning tool further comprises: A fastener is used to be inserted into the fastening hole on the first disk and the mounting groove in sequence.

5. The positioning tool according to claim 1, characterized in that: An arc-shaped groove is provided on the support seat, the notch of the arc-shaped groove passes through the top of the support seat, and the two ends of the arc-shaped groove in the first direction respectively pass through the two side surfaces of the support seat in the first direction, and the arc-shaped groove is used to support the central support tube.

6. The positioning tool according to claim 5, characterized in that: There are multiple support seats, and the multiple support seats are installed in the slide groove in sequence along the first direction.

7. The positioning tool according to claim 1, characterized in that: A plurality of first fixing holes distributed along a first direction are provided at the bottom of the slide groove, and both the support seat and the mounting seat can slide in the slide groove. Both the support seat and the mounting seat are provided with second fixing holes penetrating from top to bottom, and both the support seat and the mounting seat are fixed to the slide groove by fixing parts passing through the corresponding first fixing holes and the second fixing holes.

8. The positioning tool according to claim 1, characterized in that: A locking groove is provided on the top of the mounting seat, and the positioning tool further comprises: A compression cover, wherein a locking hole is provided on the compression cover and the compression cover is used to cover the top of the circular ring portion; A locking piece is used to be inserted into the locking hole, the center hole of the annular part and the locking groove in sequence.

9. The positioning tool according to claim 1, characterized in that: The positioning frame and the second support member are both made of square steel.

10. A positioning method for positioning a drift tube, using a positioning tool as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Install the flange in the positioning hole of the first support member, install the center support tube on the top of the support seat, install the first component on the top of the mounting seat, make the central axis of the center support tube, the central axis of the straight section and the central axis of the flange coincide, and complete the positioning.

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