A method and tool for repairing mounting holes on a torque beam for heliostats

Abstract

The application discloses a rework processing method and tool for mounting holes on a torque beam for heliostats, and belongs to the field of hole rework processing. The rework processing method and tool can quickly position a theoretical position of mounting holes on a torque beam, and ensure coaxiality of a positioning hole on a fixing tool and a theoretical axis of the mounting hole, so that accurate positioning rework of the mounting hole of the torque beam is realized. The tool can be fixedly connected with the torque beam at any site, is suitable for rework at a torque beam assembly site, and can stop rework in a factory and dependence on machine tool equipment.

Description

Technical Field

[0001] This invention relates to the field of hole repair machining, specifically to a method and tooling for repairing mounting holes on a torque beam for a heliostat. Background Technology

[0002] Heliostats are mirrors that use the principle of reflection to focus sunlight onto a single point. They are widely used in the field of concentrated solar power (CSP). The mirror structure is usually based on plane mirrors or curved mirrors, and the shapes include rectangles, circles, polygons, etc. The appropriate mirror surface and shape are selected according to the actual location and conditions of CSP power generation.

[0003] A heliostat is composed of various structural components, and the torque beam is one of its important load-bearing structural components. The machining accuracy of the mounting holes on the torque beam that connect to other structural components directly affects the assembly quality and production progress (the connection between the torque beam and other structural components is achieved by locating pins that mate with the mounting holes on the torque beam). In actual production, the mounting holes on the torque beam used for connecting to other structural components are generally machined in the production workshop using specialized machine tools. During machining, specialized tooling is used to clamp and position the torque beam. Due to factors such as machining positioning accuracy and tool wear, there may be situations where the position and diameter of the torque beam mounting holes do not meet assembly requirements during actual assembly and use on site. Therefore, it is necessary to re-machine the mounting holes. Generally, the torque beam mounting holes are re-machined using machine tools upon return to the factory. The original machine tool tooling is used for clamping and positioning during return. On the one hand, it is difficult to find the secondary positioning reference, making it difficult to locate the position of the torque beam mounting holes. On the other hand, the clamping and disassembly process of the original machine tool tooling is complex, affecting the re-machineing time. In addition, in case of emergency requiring on-site re-machineing, it is difficult to carry out due to the lack of re-machineing tooling. Therefore, the rework of the torque beam mounting holes seriously affects the intensity of rework work on the production assembly site and delays the production schedule.

[0004] Therefore, there is a need to provide a rework method and tooling for the mounting holes on the torque beam of a heliostat, so as to achieve rapid rework of the mounting holes on the torque beam. Summary of the Invention

[0005] The technical problem to be solved: To overcome the shortcomings of existing technologies, this invention provides a rework method and tooling for mounting holes on a torque beam used in heliostats. The tooling is used for detachable and fixed connection with the torque beam to position the mounting holes. This method can quickly locate the theoretical position of the mounting holes on the torque beam and ensure the coaxiality of the theoretical axes of the positioning holes and mounting holes on the fixed tooling, achieving precise positioning and rework of the torque beam mounting holes. At the same time, the tooling can be fixedly connected to the torque beam in any location, making it suitable for on-site rework of the torque beam assembly, thus eliminating the need for factory rework and the dependence on machine tools for rework.

[0006] The technical solution of this invention is: a method for reworking mounting holes on a torque beam for a heliostat, comprising: A positioning plate is installed on the end face of the end where the mounting hole of the torque beam is located, and the positioning plate and the machining tooling are detachably and fixedly connected. The end face of the end where the mounting hole of the torque beam is located is taken as the first reference surface, and the surface of the tooling facing the torque beam and in contact with the first reference surface is taken as the second reference surface. The theoretical axis of the mounting hole on the first reference plane is parallel to the axis of the mounting hole on the torque beam; the axis of the positioning hole of the tooling is parallel to the second reference plane, and the distance is the first design hole distance. The first design hole distance is also the theoretical hole distance of the mounting hole from the first reference plane. The first design hole distance determines the theoretical lateral position of the mounting hole on the torque beam. A surface on the tooling that is perpendicular to the second reference plane is designated as the third reference plane. The axis of the positioning hole of the tooling is parallel to the third reference plane, and the distance between them is the second design hole spacing. A fourth reference plane is provided on the positioning plate. The fourth reference plane is parallel to the third reference plane and located on the same side as the mounting hole. The fourth reference plane is parallel to the theoretical axis of the mounting hole, and the distance between them is the third design hole spacing. The third design hole spacing determines the theoretical longitudinal position of the mounting hole on the torque beam. The third design hole spacing plus the distance from the fourth reference plane to the third reference plane equals the second design hole spacing. The theoretical coaxial position of the positioning hole and the mounting hole is determined by the fit of the first design hole spacing, the second design hole spacing, the first reference surface and the second reference surface. The mounting hole of the torque beam is then reworked by passing a reaming tool perpendicularly through the positioning hole of the tooling.

[0007] The technical solution of the present invention is: a rework tooling for mounting holes on a torque beam of a heliostat, applicable to the rework method. The tooling includes a tooling body and a positioning plate. The positioning plate is installed on the end face of the end where the mounting hole of the torque beam is located. The end face of the positioning plate of the torque beam is a first reference surface. A fourth reference surface perpendicular to the first reference surface is provided on the positioning plate. The distance between the first reference surface and the mounting hole is a first designed hole spacing, which determines the theoretical lateral position of the mounting hole on the torque beam. The distance between the fourth reference surface and the mounting hole is a third designed hole spacing, which determines the theoretical longitudinal position of the mounting hole on the torque beam. The fixture body and the positioning plate are detachably and fixedly connected by a locking device. The fixture body is provided with a second reference surface, which is parallel to the first reference surface and the two surfaces are in contact. The fixture body is provided with a third reference surface, which is parallel to the fourth reference surface and located on the same side as the mounting hole. The fixture body is provided with a positioning hole, which is used to determine the machining position when the mounting hole is reworked and to insert the rework tool during machining. The distance between the positioning hole and the second reference surface is the same as the first design hole distance, and the distance between the positioning hole and the third reference surface is the second design hole distance. The second design hole distance is the third design hole distance plus the distance from the fourth reference surface to the third reference surface.

[0008] A further technical solution of the present invention is: the main structure of the tooling body is an L-shaped plate, and a slot is provided on its first side plate. The shape of the slot is consistent with the cross-section of the positioning plate and is used to insert the positioning plate; a positioning hole is provided on its second side plate, and the diameter of the positioning hole matches the installation hole to be repaired; the inner wall of the first side plate is a second reference surface, and the two end faces of the L-shaped plate are both third reference surfaces, which are perpendicular to the first side plate and the second side plate, respectively. The positioning plate is provided with a locking hole. When the positioning plate is inserted into the slot, the locking hole protrudes from the first side plate, and the positioning plate is locked by a locking device inserted into the locking hole. After the positioning plate is locked, the first reference surface and the second reference surface are in contact.

[0009] A further technical solution of the present invention is: the positioning plate is a plate-shaped structure with a rectangular cross section, and the distance from the edge of the locking hole near the first reference surface to the first reference surface is the thickness of the first side plate; the planes on both sides of the positioning plate that are perpendicular to the first reference surface are both fourth reference surfaces, and the two fourth reference surfaces are symmetrical with respect to the center of the mounting hole.

[0010] A further technical solution of the present invention is: the locking device includes a U-shaped pin and an elastic locking assembly. The two ends of the U-shaped pin are pins, and the diameter of the pins is consistent with the diameter of the locking hole. The elastic locking assembly is embedded in the pins. When the pins are inserted into the locking hole, the elastic locking assembly is used to lock the pins and the locking hole to prevent the pins from shifting and coming out.

[0011] A further technical solution of the present invention is as follows: three blind holes are arranged side by side on the pin rod, and a first limiting slide groove, a positioning slide groove and a second limiting slide groove are arranged in sequence from the opening end of the U-shaped pin. A transverse slide groove is provided inside the pin rod, which connects the two limiting slide grooves and the positioning slide groove, and the transverse slide groove extends a certain distance away from the second limiting slide groove as a transverse slide groove extension section; a vertical slide groove is provided on one side of the first limiting slide groove, and the vertical slide groove and the transverse slide groove extension section are vertically connected. The elastic locking assembly includes two limiting rods, a positioning rod, two connecting rods, a linkage rod, a drive rod, a drive plate, and a spring. The first limiting rod is slidably installed in the first limiting groove, the second limiting rod is slidably installed in the second limiting groove, and the positioning rod is slidably installed in the positioning groove. Both limiting rods are fixedly connected by the connecting rod and the positioning rod, and the connecting rod is located in the transverse groove. The linkage rod is collinear with the connecting rod, and is installed in the first limiting block and located in the extension section of the transverse groove. The drive rod is slidably installed in the vertical groove, with one end of the drive rod extending into the pin and fixedly connected to the linkage rod, and the other end of the drive rod protruding from the pin and fixedly connected to the drive plate. The spring is fitted onto the outer diameter of the drive rod and is located in the vertical groove. One end of the spring is fixedly connected to the end of the vertical groove near the extension section of the transverse groove, and the other end of the spring is fixedly connected to the drive plate. The locking hole is provided with a positioning slot along the radial direction, and the diameter of the positioning slot matches the outer diameter of the positioning rod. By pressing down the drive plate, the elastic locking assembly is embedded into the pin. At this time, the spring is compressed. When the positioning rod is aligned with the positioning slot, the spring force is released, and the positioning rod connects the positioning slot and the positioning slide. The outer diameter wall of the two limit rods contacts and limits the positioning plate.

[0012] A further technical solution of the present invention is: the drive plate is disc-shaped, and its outer diameter matches the diameter of the vertical groove; the upper surface of the drive plate is provided with anti-slip texture for preventing slippage when pressing.

[0013] A further technical solution of the present invention is: the top end of the positioning rod is a conical frustum, and the conical frustum structure is used for alignment when positioning with the positioning slot.

[0014] A further technical solution of the present invention is: the edges of the first and second side plates of the L-shaped plate are provided with flanges facing the inside of the L-shaped plate, and the distance between the two flanges matches the outer dimensions of the torque beam, thereby limiting the torque beam; the outer dimensions are the outer dimensions of the torque beam along the axis of the mounting hole.

[0015] The beneficial effects of this invention are: the rework method for mounting holes on a torque beam of a heliostat can accurately locate the theoretical position of the mounting hole on the torque beam to be reworked, making the positioning hole and the mounting hole coaxial on the tooling, thereby achieving the rework of the mounting hole by vertically entering the positioning hole with a hole reaming or boring tool, thus ensuring the accuracy of the rework of the mounting hole.

[0016] The tooling structure of this invention is simple, allowing for easy detachable and fixed connection with the torque beam. It can be used with machine tools to repair the mounting holes on the torque beam, and can also be used with a portable electric drilling machine at the torque beam assembly site to repair mounting holes on-site, avoiding the need to return the torque beam to the manufacturing plant for repair, saving repair time and reducing labor intensity. This solves the problem of on-site repair due to a lack of machine tools at the torque beam assembly site, making it particularly suitable for rapid repair operations in various scenarios such as outdoor solar thermal power plants, high-altitude pipeline interlayers, and narrow equipment compartments.

[0017] This invention utilizes a locking device to lock the positioning plate fixed to the torque beam and the tooling body. This ensures the positional relationship between the positioning hole on the tooling and the repair mounting hole on the torque beam, while also preventing reliable connection between the tooling and the torque beam during machining, thus preventing machining misalignment. During machining, the reaming tool's shank is limited by the positioning hole, and the tool head extends into the repair mounting hole to adjust the hole diameter, ensuring no tool wobble during machining and improving the accuracy of repair machining.

[0018] The locking device of this invention utilizes a U-shaped pin and an elastic locking assembly. Through the coordinated action of the elastic locking assembly and based on the elastic return function of the spring, it achieves the connection between the positioning rod and the positioning slot in the locking hole of the elastic locking assembly, as well as the contact limitation between the two limiting rods on both sides of the positioning rod and the positioning plate. This structure ensures the locking accuracy of the U-shaped pin on the positioning plate while facilitating disassembly, thus improving the efficiency of tooling and torque beam assembly.

[0019] The tooling of this invention is lightweight and compact, and can be easily placed in a standard toolbox, improving its portability and ease of use. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall installation structure of the rework tooling and torque beam of the present invention; Figure 2 This is a schematic diagram of the rework tooling and torque beam disassembly structure of the present invention. Figure 1 (Showing the location of the slots); Figure 3 This is a schematic diagram of the rework tooling and torque beam disassembly structure of the present invention. Figure 2 (Show the location of the positioning hole); Figure 4 This is an overall structural diagram of the locking device in this invention (including a U-shaped pin and an elastic locking assembly). Figure 5 This is an assembly diagram of the U-shaped pin and the elastic locking assembly in this invention (showing the internal cross-sectional structure of the assembly, where only the pin rod part of the U-shaped pin is shown). Figure 6 for Figure 5 The exploded view of the assembly of the U-shaped pin and the resilient locking assembly shown. Figure 7 This is a schematic diagram of the positioning plate structure in this invention; Figure 8 This is a schematic diagram of the positioning rod structure in this invention.

[0022] In the figure: 1. Tooling body, 11. Second reference surface, 12. Third reference surface, 13. Positioning hole, 14. First side plate, 15. Slot, 16. Second side plate, 2. Positioning plate, 21. Fourth reference surface, 22. Locking hole, 23. Positioning slot, 3. Locking device, 31. U-shaped pin, 311. Pin, 312. First limiting slide, 313. Positioning slide, 314. Second limiting slide, 315. Transverse slide, 316. Extension of transverse slide, 317. Vertical slide, 32. First limiting rod, 33. Positioning rod, 34. Second limiting rod, 35. Connecting rod, 36. Linkage rod, 37. Drive rod, 38. Drive plate, 39. Spring, 4. Torque beam, 41. Mounting hole, 42. First reference surface, 43. Observation hole. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1 An embodiment of a rework tooling for mounting holes on a torque beam of a heliostat is provided. This tooling is used to fix a connection to the torque beam 4, realizing mounting holes 41 on the torque beam 4. In this embodiment, the torque beam 4 is a U-shaped beam, and the mounting hole 41 is located at the bottom of the U-shaped beam at one end. Figures 1-3 As shown, the fixture includes a fixture body 1, a positioning plate 2, and a locking device 3. The positioning plate 2 is installed on the end face of the torque beam 4 at the end where the mounting hole 41 is located. The positioning plate 2 is a plate-shaped structure with a rectangular cross-section, and it is centered relative to the mounting hole 41. The end face of the torque beam 4 where the positioning plate 2 is installed is the first reference surface 42. The positioning plate 2 is provided with a fourth reference surface 21 that is perpendicular to the first reference surface 42, as shown in the figure. Figure 2 As shown, the planes perpendicular to the first reference plane 42 on both the upper and lower sides of the positioning plate 2 are the fourth reference planes 21, and the two fourth reference planes 21 are symmetrical with respect to the mounting hole 41. In this embodiment, the positioning plate 2 is made of Q235 steel plate and the surface is galvanized with a zinc coating thickness of 80-100μm to effectively prevent rust and corrosion.

[0025] The first reference surface 42 is parallel to the theoretical axis of the mounting hole 41, and the parallelism tolerance is controlled within 0.02mm. The distance between the first reference surface 42 and the mounting hole 41 is the first designed hole distance, which determines the theoretical transverse position of the mounting hole 41 in the torque beam 4. The fourth reference surface 21 is parallel to the theoretical axis of the mounting hole 41, and the parallelism tolerance is controlled within 0.02mm. The distance between the fourth reference surface 21 and the mounting hole 41 is the third designed hole distance, which determines the theoretical longitudinal position of the mounting hole 41 in the torque beam 4.

[0026] The fixture body 1 and the positioning plate 2 are detachably and fixedly connected by a locking device 3. The fixture body 1 has a second reference surface 11, which is parallel to the first reference surface 42, with a parallelism tolerance controlled within 0.02 mm. After the fixture body 1 and the positioning plate 2 are fixedly connected, the second reference surface 11 and the first reference surface 42 are in contact. The fixture body 1 has a third reference surface 12, which is parallel to the fourth reference surface 21 and located on the same side as the mounting hole 41. The fixture body 1 has a positioning hole 13, which is used to determine the machining position of the mounting hole 41 during rework and to allow the rework tool to pass through during machining.

[0027] The axis of the positioning hole 13 is parallel to the second datum surface 11, and the parallelism tolerance is controlled within 0.02mm. The distance between the positioning hole 13 and the second datum surface 11 is the first design hole spacing. The axis of the positioning hole 13 is parallel to the third datum surface 12, and the parallelism tolerance is controlled within 0.02mm. The distance between the positioning hole 13 and the third datum surface 12 is the second design hole spacing. The second design hole spacing is the third design hole spacing plus the distance from the fourth datum surface 21 to the third datum surface 12.

[0028] The lateral position of the positioning hole 13 is determined by the fit and positioning of the first reference surface 42 and the second reference surface 11, and by the first designed hole spacing. The longitudinal position of the positioning hole 13 is determined by the fourth reference surface 21, the third reference surface 12, the second designed hole spacing, and the third designed hole spacing, thus ensuring the coaxiality of the positioning hole 13 with the theoretical position of the mounting hole 41. The tooling body 1 and the positioning plate 2 are locked by the locking device 3, allowing the reaming tool to pass vertically through the positioning hole 13 of the tooling for rework machining of the mounting hole 41 of the torque beam 4. After the torque beam 4 and the tooling are fixedly connected, the coaxiality error between the theoretical positions of the positioning hole 13 and the mounting hole 41 can be stably controlled within 0.05mm, eliminating the need for repeated manual alignment and meeting the requirements for guiding and positioning accuracy in reaming machining.

[0029] In this embodiment, the main structure of the tooling body 1 is an L-shaped plate. The L-shaped plate is made of 45 steel through quenching treatment, achieving a hardness of HRC40-45, strong wear resistance, and long-term repeated use. The L-shaped plate includes a first side plate 14 and a second side plate 16 that are perpendicular to each other. The first side plate 14 has a slot 15, the shape of which is the same as the cross-section of the positioning plate 2, being a rectangular hole. The slot 15 is used to insert the positioning plate 2. The machining accuracy of the slot 15 is IT7 grade, and the hole wall roughness is Ra1.6μm to ensure the installation accuracy with the positioning plate 2. The fit clearance between the positioning plate 2 and the slot 15 is preferably 0.02-0.05mm, which ensures that the positioning plate 2 can pass smoothly through the slot 15 and avoids shaking after assembly. In particular, the clearance in the vertical direction is limited to 0.02mm as much as possible to limit the vertical movement of the fixed tooling relative to the torque beam. The second side plate 16 has a positioning hole 13, the diameter of which matches the installation hole 41 to be repaired. The inner wall of the first side plate 14 is the second reference surface 11, and both end faces of the L-shaped plate are the third reference surfaces 12. The third reference surfaces 12 are perpendicular to the first side plate 14 and the second side plate 16, respectively. The edges of the first side plate 14 and the second side plate 16 of the L-shaped plate are provided with flanges facing the inside of the L-shaped plate. The distance between the flanges on both sides matches the outer dimensions of the torque beam 4. The outer dimensions are the outer dimensions of the torque beam 4 along the axis of the mounting hole 41. After the torque beam 4 and the tooling are fixedly connected, the flanges on the first side plate 14 block the outside of the side where the mounting hole 41 of the torque beam 4 is located, and the flanges on the second side plate 16 abut the outside of the opposite side of the side where the mounting hole 41 of the torque beam 4 is located.

[0030] The positioning plate 2 is provided with a locking hole 22. The distance between the edge of the hole wall of the locking hole 22 and the first reference surface 42 is the thickness of the first side plate 14. When the positioning plate 2 is inserted into the slot 15, the locking hole 22 is exposed outside the first side plate 14, and the positioning plate 2 is locked by the locking device 3 inserted into the locking hole 22. After the positioning plate 2 is locked, the first reference surface 42 and the second reference surface 11 are in contact.

[0031] like Figure 4 As shown, the locking device 3 includes a U-shaped pin 31 and an elastic locking assembly. The U-shaped pin 31 is made of 304 stainless steel, and its two ends are pins 311. The diameter of the pins 311 is the same as the diameter of the locking hole 22. The end of the pins 311 is truncated cone-shaped with a taper of 1:10 to facilitate insertion into the locking hole 22. The elastic locking assembly is embedded in the pins 311. When the pins 311 are inserted into the locking hole 22, the elastic locking assembly locks the pins 311 and the locking hole 22 to prevent the pins 311 from shifting or coming out. The outer diameter wall of the pins 311 contacts the outer wall surface of the first side plate 14 to form a limit.

[0032] In this embodiment, as Figure 4 , Figure 5 and Figure 6 As shown, the pin 311 has three blind holes arranged side by side, and the three blind holes are arranged in a straight line along the axial direction of the pin 311. The axis of the blind holes is set radially along the pin 311. The three blind holes are arranged sequentially from the U-shaped opening end of the U-shaped pin 31 to the first limiting slide groove 312, the positioning slide groove 313 and the second limiting slide groove 314. The pin 311 has a transverse slide groove 315 inside, which is set along the axial direction of the pin 311. The transverse slide groove 315 connects the two limiting slide grooves and the positioning slide groove 313, and the transverse slide groove 315 extends a certain distance away from the second limiting slide groove 314, as the transverse slide groove extension section 316. A vertical groove 317 is provided on one side of the first limiting groove 312. The vertical groove 317 is a cylindrical hole, which is arranged side by side with three blind holes. The axis of the vertical groove 317 is parallel to and coplanar with the axis of the three blind holes. The vertical groove 317 and the extension section 316 of the transverse groove are vertically connected.

[0033] The elastic locking assembly is installed in the blind hole and slide groove corresponding to the pin 311. Specifically, the elastic locking assembly includes two limiting rods (the first limiting rod 32 and the second limiting rod 34 respectively), a positioning rod 33, two connecting rods 35, a linkage rod 36, a drive rod 37, a drive plate 38, and a spring 39.

[0034] The first limiting rod 32 is slidably installed in the first limiting groove 312, the second limiting rod 34 is slidably installed in the second limiting groove 314, and the positioning rod 33 is slidably installed in the positioning groove 313. The first limiting rod 32, the second limiting rod 34, and the positioning rod 33 are all cylindrical rods, and each is adapted to the small clearance of the blind hole it is installed in, ensuring smooth sliding while positioning. Both limiting rods are fixedly connected to the positioning rod 33 via a connecting rod 35, and the connecting rod 35 is located within the transverse groove 315. One end of one connecting rod 35 is fixedly connected to the first limiting rod 32, and its other end is fixedly connected to the positioning rod 33; one end of the other connecting rod 35 is fixedly connected to the positioning rod 33, and its other end is fixedly connected to the second limiting rod 34; the two connecting rods 35 are collinear. The linkage rod 36 is installed on the side of the first limiting block 32 facing away from the positioning rod 33, and the linkage rod 36 is located within the extension section 316 of the transverse slide groove. The linkage rod 36 is collinear with the connecting rod 35. The drive rod 37 is slidably installed within the vertical slide groove 317. One end of the drive rod 37 is fixedly connected to the linkage rod 36 and the other end of the drive rod 37 is fixedly connected to the drive plate 38. The spring 39 is fitted into the outer diameter of the drive rod 37 and is located within the vertical slide groove 317. One end of the spring 39 is fixedly connected to the end of the vertical slide groove 317 near the extension section 316 of the transverse slide groove, and the other end of the spring 39 is fixedly connected to the drive plate 38. The drive plate 38 is disc-shaped, and its outer diameter matches the aperture of the vertical slide groove 317 to ensure that the drive plate 38 can be embedded in the vertical slide groove 317 when pressed, thereby ensuring that there are no foreign objects on the outer wall of the pin 311 and facilitating its insertion into the locking hole 22. The upper surface of the drive plate 38 is provided with anti-slip texture to prevent slipping during pressing. In this embodiment, the two limit rods are made of high-strength alloy steel with a hardness of HRC38-42, which is wear-resistant and not easily deformed.

[0035] When the drive plate 38 is pressed, the elastic locking assembly can slide and embed itself inside the pin 311 without affecting the fit between the pin 311 and the locking hole 22. The fit clearance between the pin 311 and the locking hole 22 is 0.01-0.03mm, and the two fit tightly together.

[0036] In order to achieve the locking of the elastic locking assembly and the positioning plate 2, such as Figure 7 As shown, a positioning slot 23 is provided radially inside the locking hole 22 of the positioning plate 2, and the diameter of the positioning slot 23 matches the outer diameter of the positioning rod 33. The fitting clearance between the positioning rod 33 and the positioning slot 23 is 0.005-0.01mm to achieve precise positioning and ensure locking reliability.

[0037] By pressing down the drive plate 38, the elastic locking assembly is fully embedded in the pin 311, at which point the spring 39 is compressed. Then, the pin 311 is inserted into the locking hole 22. When the positioning rod 33 aligns with the positioning slot 23, the force applied to the drive plate 38 is released, and the spring 39 is released. The positioning rod 33, the two limit rods, the connecting rod 35, and the linkage rod 36 rebound under the action of the spring 39. After rebounding, the top of the positioning rod 33 enters the positioning slot 23, achieving positioning, that is, connecting the positioning slide 313 and the positioning slot 23. At the same time, the outer diameter wall of the two limit rods contacts and limits the positioning plate 2. The distance between the first limit rod 32 and the second limit rod 34 is the thickness of the positioning plate 2. When it is necessary to remove the U-shaped pin 31, press down the drive plate 38 again, and the two limit rods slide into the first limit groove 312 and the second limit groove 314 respectively, releasing the two limit rods from limiting the positioning plate 2; at the same time, the positioning rod 33 disengages from the positioning slot 23 and slides into the positioning groove 313, so that the U-shaped pin 31 can be pulled out of the locking hole 22.

[0038] To facilitate quick positioning and alignment of the positioning rod 33, such as Figure 8 As shown, the top of the positioning rod 33 is a frustum of a cone, which facilitates alignment and positioning with the positioning slot 23. Similarly, the tops of the two limiting rods are also designed as frustums of a cone, making it easy to place the positioning plate 2 between them.

[0039] With the aforementioned locking device 3, when the tooling is in the condition of reaming vibration, the locking device 3 offsets the instantaneous impact force that causes the pin to retract, and constrains the pin's degree of freedom in both axial and radial dimensions, so that the tooling and the torque beam 4 remain rigidly connected throughout the entire rework operation, and can ensure that the positioning accuracy does not change after hundreds of repeated uses.

[0040] In use, the positioning plate 2 is inserted into the slot 15 of the tooling body and locked by the locking device 3 to achieve a fixed connection between the tooling and the torque beam 4. At this time, the positioning hole 13 and the mounting hole 41 of the tooling are theoretically coaxial, and the mounting hole 41 of the torque beam 4 can be reworked by passing a reaming tool perpendicularly through the positioning hole 13 of the tooling. In order to facilitate the observation of the rework, multiple observation holes 43 are provided around the mounting hole 41 of the torque beam 4. The observation holes 43 are used to observe the entry of the tool when reworking the mounting hole 41. At the same time, the observation holes 43 can also reduce the weight of the torque beam 4 to a certain extent.

[0041] Example 2 A rework method for mounting holes on a torque beam of a heliostat, described using the rework tooling in Example 1 as an example, includes the following steps: A rectangular plate-shaped positioning plate 2 is fixed to the end face of the torque beam 4 at the end where the mounting hole 41 is located. One long side of the positioning plate 2 is in contact with the end face of the torque beam 4, with the end face of the torque beam 4 at the end where the mounting hole 41 is located as the first reference surface 42. The installation position of the positioning plate 2 is aligned with the mounting hole 41 of the torque beam 4, with the two end faces of the positioning plate 2 perpendicular to the first reference surface 42 as the fourth reference surface 21. The first reference surface 42 is parallel to the theoretical axis of the mounting hole 41 on the torque beam, and the distance is the first design hole spacing, which can determine the theoretical transverse position of the mounting hole 41 on the torque beam 4; the fourth reference surface 21 is parallel to the theoretical axis of the mounting hole 41 on the torque beam, and the distance is the third design hole spacing, which can determine the theoretical longitudinal position of the mounting hole 41 on the torque beam 4.

[0042] The positioning plate 2 and the machining fixture are fixedly connected. Specifically, the positioning plate 2 is inserted into the slot 15 of the first side plate 14, and locked by the locking device 3 through the locking hole 22 of the positioning plate 2. After locking, the inner side surface of the first side plate 14 is in contact with the first reference surface 42, and the inner side surface of the first side plate 14 is taken as the second reference surface 11, that is, the surface of the fixture facing the torque beam 4 and in contact with the first reference surface 41 is taken as the second reference surface 11.

[0043] After the positioning plate 2 and the tooling are fixedly connected, the positioning hole 13 on the tooling and the mounting hole 41 of the torque beam 4 are coaxial. The axis of the positioning hole 13 is parallel to the second datum plane 11, and the distance between them is the first design hole spacing, which is also the theoretical hole spacing between the mounting hole 41 and the first datum plane. A surface on the tooling perpendicular to the second datum plane 11 is designated as the third datum plane 12, i.e., the surfaces on both sides of the L-shaped plate that are perpendicular to the first side plate 14 and the second side plate 16, respectively. The axis of the positioning hole 13 is parallel to the third datum plane 12, and the distance between them is the second design hole spacing. The second design hole spacing is the third design hole spacing plus the distance from the fourth datum plane 21 to the third datum plane 12. It should be noted that the position of the positioning hole 13 is determined by the dimension chain of the third datum plane 12 and the fourth datum plane 21 on the same side as the mounting hole 41.

[0044] The theoretical coaxial position of the positioning hole 13 and the mounting hole 41 is determined by the fit of the first design hole spacing, the second design hole spacing, the first reference surface 42, and the second reference surface 11. The mounting hole 41 of the torque beam 4 is then reworked by passing a reaming tool perpendicularly through the positioning hole 13 of the tooling. During processing, the torque beam can be returned to the factory for rework using machine tools in conjunction with the tooling of this invention, or it can be reworked on-site using a portable electric drilling machine in conjunction with the tooling of this invention.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for reworking mounting holes on a torque beam for a heliostat, characterized in that the method... include: A positioning plate is installed on the end face of the end where the mounting hole of the torque beam is located, and the positioning plate and the machining tooling are detachably and fixedly connected. The end face of the end where the mounting hole of the torque beam is located is taken as the first reference surface, and the surface of the tooling facing the torque beam and in contact with the first reference surface is taken as the second reference surface. The theoretical axis of the mounting hole on the first reference plane is parallel to the axis of the mounting hole on the torque beam; the axis of the positioning hole of the tooling is parallel to the second reference plane, and the distance is the first design hole distance. The first design hole distance is also the theoretical hole distance of the mounting hole from the first reference plane. The first design hole distance determines the theoretical lateral position of the mounting hole on the torque beam. A surface on the tooling that is perpendicular to the second reference plane is designated as the third reference plane. The axis of the positioning hole of the tooling is parallel to the third reference plane, and the distance between them is the second design hole spacing. A fourth reference plane is provided on the positioning plate. The fourth reference plane is parallel to the third reference plane and located on the same side as the mounting hole. The fourth reference plane is parallel to the theoretical axis of the mounting hole, and the distance between them is the third design hole spacing. The third design hole spacing determines the theoretical longitudinal position of the mounting hole on the torque beam. The third design hole spacing plus the distance from the fourth reference plane to the third reference plane equals the second design hole spacing. The theoretical coaxial position of the positioning hole and the mounting hole is determined by the fit of the first design hole spacing, the second design hole spacing, the first reference surface and the second reference surface. The mounting hole of the torque beam is then reworked by passing a reaming tool perpendicularly through the positioning hole of the tooling.

2. A rework tooling for mounting holes on a torque beam of a heliostat, applicable to the rework method described in claim 1, characterized in that, The tooling includes a tooling body and a positioning plate. The positioning plate is installed on the end face of the torque beam where the mounting hole is located. The end face of the positioning plate is the first reference surface. The positioning plate is provided with a fourth reference surface that is perpendicular to the first reference surface. The distance between the first reference surface and the mounting hole is the first designed hole spacing, which determines the theoretical lateral position of the mounting hole in the torque beam. The distance between the fourth reference surface and the mounting hole is the third designed hole spacing, which determines the theoretical longitudinal position of the mounting hole in the torque beam. The fixture body and the positioning plate are detachably and fixedly connected by a locking device. The fixture body is provided with a second reference surface, which is parallel to the first reference surface and the two surfaces are in contact. The fixture body is provided with a third reference surface, which is parallel to the fourth reference surface and located on the same side as the mounting hole. The fixture body is provided with a positioning hole, which is used to determine the machining position when the mounting hole is reworked and to insert the rework tool during machining. The distance between the positioning hole and the second reference surface is the same as the first design hole distance, and the distance between the positioning hole and the third reference surface is the second design hole distance. The second design hole distance is the third design hole distance plus the distance from the fourth reference surface to the third reference surface.

3. The rework tooling for the mounting holes on the torque beam of a heliostat according to claim 2, characterized in that, The main structure of the tooling body is an L-shaped plate, and its first side plate is provided with a slot. The shape of the slot is consistent with the cross-section of the positioning plate, and it is used to insert the positioning plate. The second side plate has a positioning hole, the diameter of which matches the installation hole to be repaired; the inner wall of the first side plate is the second reference surface, and the two end faces of the L-shaped plate are the third reference surfaces, which are perpendicular to the first side plate and the second side plate respectively. The positioning plate is provided with a locking hole. When the positioning plate is inserted into the slot, the locking hole protrudes from the first side plate, and the positioning plate is locked by a locking device inserted into the locking hole. After the positioning plate is locked, the first reference surface and the second reference surface are in contact.

4. The rework tooling for the mounting holes on the torque beam of a heliostat according to claim 3, characterized in that, The positioning plate is a plate-shaped structure with a rectangular cross-section. The distance from the edge of the locking hole near the first reference surface to the first reference surface is the thickness of the first side plate. The planes on both sides of the positioning plate that are perpendicular to the first reference surface are the fourth reference surfaces, and the two fourth reference surfaces are symmetrical with respect to the center of the mounting hole.

5. The rework tooling for the mounting holes on the torque beam of a heliostat according to claim 3, characterized in that, The locking device includes a U-shaped pin and an elastic locking assembly. The two ends of the U-shaped pin are pins with the same diameter as the locking hole. The elastic locking assembly is embedded in the pins. When the pins are inserted into the locking hole, the elastic locking assembly locks the pins and the locking hole to prevent the pins from shifting out.

6. The rework tooling for the mounting holes on the torque beam of a heliostat according to claim 5, characterized in that, The pin has three blind holes arranged side by side. From the opening end of the U-shaped pin inward, there are the first limiting slide groove, the positioning slide groove and the second limiting slide groove. The pin has a transverse slide groove inside, which connects the two limiting slide grooves and the positioning slide groove. The transverse slide groove extends a certain distance away from the second limiting slide groove as an extension section of the transverse slide groove. A vertical slide groove is provided on one side of the first limiting slide groove, and the vertical slide groove and the extension section of the transverse slide groove are vertically connected. The elastic locking assembly includes two limiting rods, a positioning rod, two connecting rods, a linkage rod, a drive rod, a drive plate, and a spring. The first limiting rod is slidably installed in the first limiting groove, the second limiting rod is slidably installed in the second limiting groove, and the positioning rod is slidably installed in the positioning groove. Both limiting rods are fixedly connected by the connecting rod and the positioning rod, and the connecting rod is located in the transverse groove. The linkage rod is collinear with the connecting rod, and is installed in the first limiting block and located in the extension section of the transverse groove. The drive rod is slidably installed in the vertical groove, with one end of the drive rod extending into the pin and fixedly connected to the linkage rod, and the other end of the drive rod protruding from the pin and fixedly connected to the drive plate. The spring is fitted onto the outer diameter of the drive rod and is located in the vertical groove. One end of the spring is fixedly connected to the end of the vertical groove near the extension section of the transverse groove, and the other end of the spring is fixedly connected to the drive plate. The locking hole is provided with a positioning slot along the radial direction, and the diameter of the positioning slot matches the outer diameter of the positioning rod. By pressing down the drive plate, the elastic locking assembly is embedded into the pin. At this time, the spring is compressed. When the positioning rod is aligned with the positioning slot, the spring force is released, and the positioning rod connects the positioning slot and the positioning slide. The outer diameter wall of the two limit rods contacts and limits the positioning plate.

7. The rework tooling for the mounting holes on the torque beam of a heliostat according to claim 6, characterized in that, The drive plate is disc-shaped, and its outer diameter matches the diameter of the vertical groove. The upper surface of the drive plate is provided with anti-slip texture to prevent slipping when pressed.

8. The rework tooling for the mounting holes on the torque beam of a heliostat according to claim 6, characterized in that, The top of the positioning rod is a conical frustum, which is used for alignment when positioning with the positioning slot.

9. The rework tooling for the mounting holes on the torque beam of a heliostat according to claim 3, characterized in that, Both the first and second side plates of the L-shaped plate have flanges facing inwards towards the L-shaped plate. The distance between the two flanges matches the outer dimensions of the torque beam, thus limiting the torque beam. The outer dimensions refer to the outer dimensions of the torque beam along the axis of the mounting hole.

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