A silk thread clamping, positioning and tensioning device for a synchronous turntable

Abstract

The present invention discloses a silk thread clamping, positioning and tensioning device for a synchronous turntable, which is characterized in that it includes two oppositely placed turntables; the turntable for fixing the beginning and end of the silk thread is an open-side turntable, and the turntable for fixing the middle part of the silk thread is a closed-side turntable; the open-side turntable includes a bottom plate, on which a translation plate is provided, and two vertical columns are transversely arranged thereon for fixing a wire releasing structure having two wire grooves, wherein the first wire groove is consistent with the rotation center of the turntable; a square plate is also provided on the translation plate, one end of which is vertically and fixedly connected to the translation plate, and a tensioning and fixing block is provided at the other end; a hole is provided at the center of the square plate, and a first coaxial tensioning structure obliquely passes through the hole and is connected to the starting end of the silk thread bypassing the first wire groove, and the other end is connected to one end of the tensioning and fixing block; one end of the horizontally placed second coaxial tensioning structure is connected to the end of the silk thread bypassing the second wire groove, and the other end is connected to the tensioning and fixing block; the closed-side turntable is basically the same as the open-side turntable in structure.

Description

Technical Field

[0001] The present invention belongs to the technical field of synchrotron radiation, and particularly relates to a wire clamping, positioning and tensioning device for a synchronous turntable. Background Art

[0002] In the collimation of particle accelerators, the traditional pre-collimation method based on the mechanical center of magnets introduces a deviation between the mechanical center and the magnetic center. The method of using the mechanical center to replace the physical center no longer meets the accuracy requirements of future light sources. It is necessary to perform pre-collimation and extraction of the magnetic center of the magnets. The rotating wire collimation technology can realize pre-collimation and extraction of the magnetic center. By rotating the wire, the magnetic center position of the magnet is measured, so as to collimate the magnetic center of the magnet equipment of the particle accelerator to the theoretical position.

[0003] Specifically, two rotatable turntables that can rotate synchronously are fixed on the rotating frames on both sides of the magnet. By synchronously rotating the turntables, the wire is driven to rotate to measure the magnetic center of the magnet. The starting end and the ending end of a complete closed wire are both fixed on the left turntable (referred to as the open side for short), and the middle part of the wire is fixed on the right turntable (referred to as the closed side for short). It seems that two wires pass through the mechanical center of the magnet. One of the wires passes through the rotation center of the two turntables and is called the self-rotating wire, and the other revolves around the rotation axis and is called the revolving wire. Different magnets have different rotation radii, so the rotation radius needs to be adjustable; the wire cannot contact any conductive parts when fixed on the turntable; after the wire is placed, the self-rotating wire needs to be finely adjusted to the position of the rotation center of the turntable, and an adjustment mechanism is required; on both sides of the turntable, the wire needs to be tightened with appropriate forces to ensure that the sag is as small as possible, but the wire cannot be broken.

[0004] At present, there is no research and application on rotating wire pre-collimation in China. The APSU project in the United States has successfully used rotating wires for unit pre-collimation. For a pre-collimation unit with 4 quadrupole magnets and 1 sextupole magnet, two rounds of measurement and adjustment were carried out, with a total time of 80 minutes, a magnetic center measurement accuracy of 10 μm, and a magnet position deviation of less than 10 μm, which also shows the feasibility of the rotating wire collimation technology in principle and technology. APSU uses the pulley winding method to fix the wire. A cylindrical barrel extends along the rotation axis of the turntable. A non-metallic flat plate is fixedly installed on the end face of the cylindrical barrel with screws, and the pulley is screwed onto the flat plate with screws passing through the axis of the pulley. The wire is placed in the pulley groove. The diameter of the pulley groove is the rotation radius. The disadvantage of this device is that it cannot ensure that the pulley groove is clean and sharp, which is likely to introduce error sources and lead to inaccurate rotation radius; it cannot meet the requirements of various rotation radii for different magnets; after the wire is placed, it needs to be finely adjusted to the position of the rotation center of the turntable, and this device has no adjustment mechanism; moreover, the tension of the wire is not adjustable. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a wire clamping, positioning and tensioning device for a synchronous turntable. The device can achieve stable clamping and tensioning of the wire on a synchronously rotating turntable. After adopting this device, the rotation radius of the device can be changed by replacing the ceramic cone, and three ceramic cones are spliced ​​to form two small V-shaped grooves. The wire is accurately positioned in the groove. The ceramic cone surface is easy to process in terms of technology, and the processing accuracy is high, which improves the accuracy of the rotation radius; a coaxial tensioning structure of the splint, spring and bolt is designed, and the tension force test of the spring is carried out. The 1×8×30 spring is selected. When the deformation is 4.5mm, the wire is subjected to moderate force, which achieves stable tensioning of the rotating wire; a small-size and compact six-screw mechanism is designed to adjust the coincidence of the wire rotation axis and the two rotating axes.

[0006] The technical solution of the present invention is:

[0007] A wire clamping, positioning and tensioning device for a synchronous turntable, characterized in that it comprises two turntables placed opposite to each other; wherein the turntable used for fixing the starting end and the tail end of the wire is called an open-side turntable, and the turntable used for fixing the middle part of the wire is called a closed-side turntable;

[0008] The open-side turntable comprises a turntable fixed base plate, a translation plate is provided on the turntable fixed base plate, and a plurality of adjustment and fixing blocks are provided around the translation plate, and two uprights are horizontally provided on the translation plate, and a wire-releasing structure with two wire grooves is connected and fixed to the two uprights for the wire to pass through the wire groove, wherein the first wire groove is consistent with the rotation center of the open-side turntable; the adjustment and fixing block is used to adjust the position of the V-shaped groove by adjusting the horizontal and vertical positions of the translation plate; a square plate is also provided on the translation plate, one end of the square plate is vertically fixedly connected to the translation plate, and the other end is provided with a tensioning and fixing block; a hole is provided in the center of the square plate, and one end of the first coaxial tensioning structure is connected to the starting end of the wire passing through the first wire groove after obliquely passing through the hole, and the other end of the first coaxial tensioning structure is connected to one end of the tensioning and fixing block; one end of the horizontally placed second coaxial tensioning structure is connected to the tail end of the wire passing through the second wire groove, and the other end of the second coaxial tensioning structure is connected to the other end of the tensioning and fixing block;

[0009] The closed-side turntable includes a turntable fixed base plate, on which a translation plate is provided. Around the translation plate, several adjustment and fixing blocks are provided. Horizontally arranged on the translation plate are two columns, and a wire feeding structure with two wire grooves is connected and fixed to the two columns for the wire to bypass through the wire grooves, where the first wire groove is aligned with the rotation center of the closed-side turntable; the adjustment and fixing blocks are used to adjust the horizontal and vertical positions of the translation plate to achieve the position adjustment of the V-shaped groove; on the translation plate, there is also a square plate, one end of which is perpendicularly and fixedly connected to the translation plate, and the other end is provided with a tensioning and fixing block; one end of a horizontally placed coaxial tensioning structure is connected to the tensioning and fixing block, and the other end of the coaxial tensioning structure is provided with a column for the wire bypassing through the first wire groove to wind around the column and then enter the second wire groove.

[0010] Further, the wire feeding structure includes a V-shaped groove and three ceramic columns with taper angles placed closely against the inclined surface of the V-shaped groove. The three ceramic columns are placed in the opening of the V-shaped groove through a connecting device; the opening side of the V-shaped groove faces the translation plate, and the taper tips of the three ceramic columns are pairwise opposed and closely attached to form two wire grooves.

[0011] Further, the wire groove is a V-shaped groove with an angle of 90°.

[0012] Further, the ceramic column in the middle has tapered ends at both ends, and one end of the ceramic columns at both ends is tapered; the taper tips of the ceramic columns at both ends are respectively closely attached to one taper tip of the middle ceramic column to form two wire grooves.

[0013] Further, the connecting device includes a snap ring and a binding strap, and the three ceramic cones are fixed in the opening of the V-shaped groove through the snap ring and the binding strap.

[0014] Further, the machining accuracy of the taper angle of the ceramic column is ±0.005°, and the machining accuracy of both the taper angle and the end face with a taper angle is 0.4.

[0015] Further, the coaxial tensioning structure includes a clamping plate, a spring and a tensioning bolt, where the central symmetry axis of the clamping plate, the axis of the spring and the axis of the tensioning bolt are collinear. One end of the clamping plate is used to connect with the wire, one end hook of the spring is connected to the other end of the clamping plate along the axial direction of the wire, the other end hook of the spring is connected to the tensioning nut, and the tensioning nut is connected to the tensioning bolt at one end of the tensioning and fixing block.

[0016] Further, the diameter of the column is consistent with the rotation radius of the wire.

[0017] Further, the V-shaped groove is provided with a plurality of ball sockets for placing tracker target balls; the turntable fixed base plate is provided with ball sockets for placing tracker target balls.

[0018] The present invention has the following characteristics:

[0019] 1. Proposal of a method to change the rotation radius of the device by replacing the middle ceramic cone.

[0020] 2. Design of a coaxial tension structure for the clamping plate, spring and bolt.

[0021] 3. Proposal of a method to tension the silk thread for the upper and lower structures on the open side.

[0022] 4. Proposal of a method to wind and fix the silk thread with a clamping plate with a cylindrical protrusion on the closed side.

[0023] 5. When the turntable rotates synchronously, one silk thread rotates around its own axis passing through the turntable axis, and the other rotates around the rotation center.

[0024] 6. Calibration and assembly adjustment of this device are carried out using a laser tracker.

[0025] The advantages of the present invention are as follows:

[0026] 1. The rotation radius of the silk thread of the present invention is adjustable, and only the ceramic cone needs to be replaced, which can effectively improve the efficiency and the structure is stable.

[0027] 2. The present invention utilizes a coaxial tension structure of a clamping plate, a spring and a bolt, and the tension force of the spring is tested. When a 1×8×30 spring deforms by 4.5 mm, the force on the wire is appropriate, realizing stable tension of the rotating wire.

[0028] 3. The present invention can use a small-size compact six-screw mechanism to finely adjust the coincidence of the silk thread rotation axis and the two rotating shafts.

[0029] 4. The present invention can use a laser tracker to cooperate in the calibration of the device and the precise adjustment of the position of the ceramic cone. Brief Description of the Drawings

[0030] Figure 1 It is a silk thread clamping, positioning and tensioning device for the synchronous turntable of the present invention.

[0031] Figure 2 It is a single-cone ceramic column.

[0032] Figure 3 It is a double-cone ceramic column.

[0033] Figure 4 It is a V-shaped groove.

[0034] Figure 5 It is a schematic diagram of the assembly of the ceramic column V-shaped groove.

[0035] Figure 6 It is a coaxial tension structure.

[0036] Figure 7 It is the turntable on the open side.

[0037] Figure 8 is a closed-side turntable.

[0038] Among them, 1 - turntable fixed base plate, 2 - translation plate, 3 - adjustment fixed block, 4 - column, 5 - square plate, 6 - clamping plate, 7 - spring, 8 - tension nut, 9 - tension fixed block, 10 - ceramic cone, 11 - V-shaped groove, 12 - tension bolt. Specific implementation mode

[0039] The present invention will be further described in detail below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0040] As Figure 1 shown, the present invention includes two turntables placed opposite to each other. The starting end and the ending end of the silk thread are fixed on the same side turntable, which is simply called the open-side turntable; the middle part of the silk thread is fixed on the other turntable, which is simply called the silk thread closed-end turntable. Figure 2 is a structure of a ceramic column at one end, with a 45° cone at one end, called a single-cone ceramic column; Figure 3 is a structural diagram of a ceramic column in the middle, with cones at both ends, called a double-cone ceramic column. Figure 5 In, the apexes of the three ceramic columns are pairwise opposed and closely attached to form two V-shaped grooves with an angle of 90°. The silk thread bypasses the V-shaped grooves, and one of the V-shaped grooves is consistent with the rotation center of the turntable. The axial lengths of the two conical surfaces of the double-cone ceramic column are equal to the rotation radius. By changing the length dimension of the ceramic cone, the rotation radius of the device carrying the silk thread can be adjusted. After the apexes of the three ceramic columns are tightly attached to each other, their column surfaces are then closely attached to Figure 4 the 115° inclined surface of the V-shaped groove of Figure 4 The parts shown later are all simply called V-shaped grooves and are fixed by straps and semi-circular rings. There are 8 ball sockets on the V-shaped groove 11, and a 0.5-inch tracker target ball can be placed. There are 2 ball sockets on the turntable fixed base plate 1, and the tracker target ball can also be placed. During actual assembly, the tracker can be used for calibration and fine adjustment.

[0041] Figure 2 and Figure 3 In, the machining accuracy of the cone angle of the ceramic column is ±0.005°, and the machining accuracy of the cone angle and the end face with the cone angle is 0.4. The V-shaped groove is fastened to the two horizontal columns 4 by 6 bolts. There is a brass bolt on each of the columns 4 against the two end faces of the ceramic cone 10. The translation plate 2 is on the back of the column 4; there is a small-size compact six-screw mechanism around the translation plate 2, that is, Figure 7 the adjustment fixed block 3 in, which is used to adjust the V-shaped groove 9 horizontally and longitudinally to make the silk thread consistent with the rotation center of the turntable. Figure 7It includes two clamping plates 6, among which the first clamping plate passing obliquely downward through the square plate 5 is used to clamp the starting end of the silk thread passing through the rotation center of the turntable; the second clamping plate horizontally placed longitudinally above the square plate 5 is used to clamp the end of the silk thread. The distance between the two silk threads at the head and tail ends is the rotation radius. A coaxial tensioning structure of the clamping plate 6, the spring 7 and the tensioning bolt 12 as shown in Figure 6 is designed. Among them, the central symmetry axis of the clamping plate 6, the axis of the spring 7, and the axis of the tensioning bolt 12 are collinear. The clamping plate clamps the silk thread. One end hook of the spring pulls the clamping plate along the axial direction of the silk thread, and the other end hook is connected to the tensioning nut 8. The tensioning bolt 12 is screwed into the threaded hole on the tensioning nut 8 to realize their connection. When the tensioning bolt 12 moves left and right along the axial direction of the silk thread, it will drive the tensioning nut 8, the spring 7, the clamping plate 6 and the silk thread to move together. The silk thread of this tensioning structure is not easily broken, and the tension of the spring is tested. When a 1×8×30 spring deforms by 4.5 mm, the force on the wire is moderate, realizing the stable tension of the rotating wire.

[0042] The coaxial tensioning structure of the silk thread on the opening side is divided into two layers. The lower clamping plate tightens the self-rotating wire, and the upper clamping plate of the clamping plate 6 tightens the revolving wire. The tensioning and fixing block 9 is an integral structure with a single-sided guide groove. The tensioning nut is a cube structure. When the silk thread is tensioned, the side surface of the nut is parallel to the vertical surface of the guide groove. When the turntable rotates, the vertical surface of the guide groove will limit the degree of freedom of the tensioning nut to rotate along the axis of the turntable. When the nut wants to rotate, it will be blocked by the vertical surface of the guide groove, avoiding the rotation of the tensioning nut resulting in unstable tension. After the tensioning bolt is tightened, the silk thread is clamped and fixed at the same time. A large square hole is dug in the middle of the square plate 5, which can reduce its own weight and also allow the clamping plate to pass obliquely through the square hole. The closed-side turntable is as shown in Figure 8 shown. The difference between it and the opening-side turntable is that the clamping plate is integral, with a cylindrical protrusion 2 mm high in the middle. The middle part of the silk thread is wound around the cylinder. The diameter of the cylinder is the rotation radius of the silk thread. The clamping plate is located directly below the middle ceramic cone 10, and the silk thread will be tightened along the longitudinal direction of the ceramic cone angle, and the silk thread is not easily torn. The tensioning and fixing block of the closed-side turntable only needs to fix the tensioning bolt directly above the square plate. The tensioning and fixing block of the opening-side turntable fixes the bolt for tightening the revolving wire above the square plate and fixes the bolt for tightening the self-rotating wire below the square plate. The ceramic cones on both sides are mirror-mounted, and the turntables are placed opposite to each other. The silk thread is clamped and tensioned, and the tension is stable. When the two turntables placed opposite to each other rotate in opposite directions respectively, the silk thread also rotates accordingly. It is equivalent to one silk thread rotating around its own axis at the rotation center of the turntable, and the other silk thread revolving around it. The rotation radius between the silk threads is controlled by the axial length of the middle ceramic cone, and the rotation radius is adjustable.

[0043] The whole set of the rotating frame of the present invention is placed on the marble platform of the three-coordinate measuring machine, and the self-rotating wire and the revolving wire of the wire pass through the magnet. The rotating frame mainly includes an adjusting mechanism at the bottom of the magnet, triangular supports on both sides of the magnet, and a silk clamping and tensioning mechanism for the synchronous rotating table. The device of the present invention is fixed on the triangular support.

[0044] Although specific embodiments of the present invention are disclosed for illustrative purposes, which are intended to help understand the content of the present invention and implement it accordingly, those skilled in the art can understand that various substitutions, changes, and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the present invention should not be limited to the content disclosed in the best embodiments, and the scope of protection claimed by the present invention shall be subject to the scope defined by the claims.

Claims

1. A silk thread clamping, positioning and tensioning device for a synchronous turntable, characterized in that It includes two turntables placed opposite to each other; the turntable used to fix the starting end and the end of the silk thread is called the open side turntable, and the turntable used to fix the middle part of the silk thread is called the closed side turntable; The open-side turntable comprises a turntable fixed base plate, a translation plate is provided on the turntable fixed base plate, and a plurality of adjustment and fixing blocks are provided around the translation plate, and two uprights are horizontally provided on the translation plate, and a wire-releasing structure with two wire grooves is connected and fixed to the two uprights for the wire to pass through the wire groove, wherein the first wire groove is consistent with the rotation center of the open-side turntable; the adjustment and fixing block is used to adjust the position of the first wire groove by adjusting the horizontal and vertical positions of the translation plate; a square plate is also provided on the translation plate, one end of the square plate is vertically fixedly connected to the translation plate, and the other end is provided with a tensioning and fixing block; a hole is provided in the center of the square plate, and one end of the first coaxial tensioning structure is connected to the starting end of the wire passing through the first wire groove after obliquely passing through the hole, and the other end of the first coaxial tensioning structure is connected to one end of the tensioning and fixing block; one end of the horizontally placed second coaxial tensioning structure is connected to the tail end of the wire passing through the second wire groove, and the other end of the second coaxial tensioning structure is connected to the other end of the tensioning and fixing block; The closed-side turntable includes a turntable fixed base plate, a translation plate is provided on the turntable fixed base plate, a plurality of adjustment and fixing blocks are provided around the translation plate, two uprights are horizontally provided on the translation plate, and a wire-releasing structure with two wire grooves is connected and fixed to the two uprights for the wire to pass around the wire grooves, wherein the first wire groove is consistent with the rotation center of the closed-side turntable; the adjustment and fixing block is used to adjust the position of the first wire groove by adjusting the horizontal and vertical positions of the translation plate; a square plate is also provided on the translation plate, one end of the square plate is vertically fixedly connected to the translation plate, and the other end is provided with a tensioning and fixing block; one end of a horizontally placed coaxial tensioning structure is connected to the tensioning and fixing block, and the other end of the coaxial tensioning structure is provided with a upright column for the wire that passes around the first wire groove to enter the second wire groove after passing around the upright column; The wire-releasing structure comprises a V-shaped groove and three ceramic columns with cone angles placed close to the inclined surface of the V-shaped groove. The three ceramic columns are placed in the opening of the V-shaped groove through a connecting device. The opening side of the V-shaped groove faces the translation plate, and the cone tops of the three ceramic columns are pressed against each other to form two wire grooves. The coaxial tensioning structure includes a clamp, a spring and a tensioning bolt, wherein the central symmetry axis of the clamp, the axis of the spring and the axis of the tensioning bolt are three colinear axes, one end of the plate clamp is used to connect with the wire, one end of the spring is hooked and connected to the other end of the clamp along the axial direction of the wire, the other end of the spring is hooked and connected to the tensioning nut, and the tensioning nut is connected to the tensioning bolt at one end of the tensioning fixing block.

2. The silk thread clamping, positioning and tensioning device for a synchronous turntable according to claim 1, wherein The wire groove is a V-shaped groove with an angle of 90°.

3. The silk thread clamping, positioning and tensioning device for a synchronous turntable according to claim 1, wherein Both ends of the ceramic column located in the middle are conical, and one end of the ceramic column located at both ends is conical; the cone tops of the ceramic columns at both ends are respectively closely attached to a cone top of the middle ceramic column to form two wire grooves.

4. The silk thread clamping, positioning and tensioning device for the synchronous turntable according to claim 1, wherein, The connecting device comprises a clamping ring and a binding band, and the three ceramic columns are fixed in the V-shaped groove opening through the clamping ring and the binding band.

5. The silk thread clamping, positioning and tensioning device for a synchronous turntable according to claim 1, wherein, The machining accuracy of the taper angle of the ceramic column is ±0.005°, and the machining accuracies of both the taper angle and the end face with a taper angle are 0.

4.

6. The silk thread clamping, positioning and tensioning device for the synchronous turntable according to claim 1, characterized in that, The diameter of the column is consistent with the rotation radius of the wire.

7. The silk thread clamping, positioning and tensioning device for the synchronous turntable according to claim 1, characterized in that, A plurality of ball sockets for placing the tracker target balls are provided on the first wire groove; ball sockets for placing the tracker target balls are provided on the fixed bottom plate of the turntable.

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