A high-precision splicing structure for a super-high-speed guide rail

Abstract

The present invention relates to a high-precision splicing structure for a super-high-speed guide rail, belonging to the field of high-precision splicing structures for super-high-speed guide rails. The high-precision splicing structure for a super-high-speed guide rail includes a first guide rail, a second guide rail, and a first tapered bolt. The first guide rail is inserted into the second guide rail. The diameter of the first light hole of the first guide rail is larger than the diameter of the threaded hole of the second guide rail, and the first light hole is eccentrically arranged in a direction away from the second guide rail relative to the threaded hole. The first tapered bolt includes a first tapered bolt head and a first screw rod connected in sequence. The first screw rod passes through the first light hole and is threadedly connected to the threaded hole. The beneficial effects are as follows: The problem that the splicing accuracy will decrease after use is solved, and there is no need to weld and grind on-site during installation. The purpose of having a small error in the guide rail joint is achieved, and the overall quality and performance stability of the guide rail after assembly are improved.

Description

Technical Field

[0001] The present invention relates to the fields of aerospace, electromagnetic catapult / launch or hypersonic operation test, and particularly relates to a high-precision splicing structure for a hypersonic guide rail. Background Art

[0002] High-precision guide rails are generally processed by grinding machines, and the processing accuracy can generally reach an error of less than 0.02 mm. Limited by the processing capacity of the machine tool, a single guide rail is generally 3 to 5 meters long. In the actual use process of the guide rail, in order to meet longer use requirements, splicing of the guide rails is a common means, and the stability and splicing accuracy of the guide rail joint position directly affect the use effect of the guide rail. Therefore, a relatively stable and reliable joint method is the key technology in the application process of the guide rail.

[0003] Currently, in general industries (such as the field of automated production), the application scenario of high-speed guide rails is a maximum speed of max = 4 m / s. The installation of the guide rails is mainly direct connection with straight edges facing each other, as shown in Figure 1 and Figure 2 The two sides of the guide rail are working surfaces. This traditional joint form meets the use requirements for the current speed use environment of less than or equal to 4 m / s. The joint accuracy (height, width, arc profile, surface roughness, etc. of the guide rail) is completely guaranteed by the machining accuracy of the guide rail, and the surfaces in contact with the connected guide rails are also guaranteed by the machining accuracy. Good joint accuracy can be guaranteed in the initial stage of installation.

[0004] Disadvantages of the traditional splicing method: as shown in Figure 3 and Figure 4 1) After long-term use, if the bolts are loose, the machining accuracy of the guide rail is insufficient, there are defects, the rigidity is insufficient, wear, deformation, or the primary installation accuracy is insufficient, etc., the guide rail will move / slip to the left and right sides, resulting in or increasing the height difference h, and the protruding height will exceed the design index. In this way, there will be steps of different heights on the side, causing jams to the moving parts on the guide rail. If the thrust is large, there may be a risk of damage to the entire guide rail or equipment. This risk and harm increase synchronously with the increase in the running speed of the slider on the guide rail. 2) The joint width of the two ends of the guide rail will also increase. For the guide rail joint width d, when the slider or roller passes through, additional harmful vibrations and shaving phenomena will occur, which will seriously affect the service life of the slider, roller or ball. 3) It is easily affected by the accuracy of the installation surface, affecting the joint accuracy of the guide rail. 4) When the external load is large, it will also cause the increase of the height difference h and the joint width d, affecting the stable operation state.

[0005] In the fields of aerospace testing, hypersonic operation testing, electromagnetic catapult or electromagnetic launch rails, or high-speed launch rails, etc., the speed can reach above Mach 1 (340.3 m / s), and it is quite common to reach even higher speeds of several Mach. This traditional rail splicing method exposes serious risk hazards. Mach-speed rails are usually quite long (the length can reach several kilometers to more than ten kilometers), and each splicing joint of the rail is a risk point. If any of the above risks occur, it may lead to catastrophic consequences.

[0006] Currently, the commonly adopted method for splicing high-speed rails is: after splicing, the joint is polished a second time by a welding machine. This method is relatively effective, but the second polishing is completed manually or semi-automatically at the equipment installation site (mostly outdoor construction), and the accuracy of the second polishing is relatively low (only an error of up to 0.1 mm can be achieved), which is far from sufficient for high-speed rails with strict vibration requirements. Summary of the Invention

[0007] The technical problem to be solved by the present invention is how to reduce the splicing error of the rails.

[0008] The technical solution of the present invention to solve the above technical problem is as follows: A high-precision splicing structure for a hypersonic rail, including a first rail, a second rail, and a first tapered bolt.

[0009] One side of the end of the first rail has a first extension block extending outward along its length direction, and a first vacancy is formed on the other side or in the middle. The first extension block has a first tapered hole and a first optical hole that are coaxially arranged and communicate with each other. One side of the end of the second rail has a second vacancy, and the other side or in the middle has a second extension block extending outward along its length direction. The second extension block has a threaded hole. The first extension block is inserted into the second vacancy, and the second extension block is inserted into the first vacancy.

[0010] The diameter of the first optical hole is larger than the diameter of the threaded hole, and the first optical hole is eccentrically arranged in a direction away from the second rail with respect to the threaded hole. The first tapered bolt includes a first tapered bolt head and a first screw rod connected in sequence. The first screw rod passes through the first optical hole and is threadedly connected to the threaded hole. The first tapered bolt head is located in the first tapered hole, and the taper angle of the first tapered bolt head is the same as that of the first tapered hole.

[0011] The beneficial effects of the present invention are as follows: The first extension block is inserted into the second vacancy, and the second extension block is inserted into the first vacancy to achieve the insertion and positioning of the two guide rails. Subsequently, the first tapered bolt passes through the first light hole and is threadedly connected to the threaded hole. Since the first light hole and the threaded hole are eccentrically arranged, during the process of screwing the first tapered bolt into the threaded hole, the head of the first tapered bolt is adapted to the shape of the first tapered hole and plays a centering role. The head of the first tapered bolt exerts a radial force on the side wall of the first tapered hole, causing the first guide rail and the second guide rail to move towards each other and be pressed tightly, and the first light hole and the threaded hole tend to move to be coaxial.

[0012] The new guide rail joint structure form of the present invention solves the problem that the joint accuracy will decrease after use, and there is no need for on-site welding and grinding. The purpose of having a small error in the guide rail joint is achieved, improving the overall quality and performance stability of the assembled guide rail. Specifically, it has the following advantages:

[0013] 1) After the first guide rail and the second guide rail are installed, the joint width is automatically tightened, improving the installation accuracy.

[0014] 2) Multiple guide rails can be connected into a whole using this splicing structure, and it is not easy to separate under external influence, and the joint position has higher structural stability.

[0015] 3) The structure is simple and easy to install, and there is no need for complex and difficult-to-control operations such as on-site butt welding and grinding of the joint.

[0016] 4) The guide rail splicing accuracy is decoupled from the installation surface accuracy. The accuracy of the guide rail joint is not affected by the accuracy of the guide rail and the installation surface, and the joint accuracy of the guide rail depends entirely on its own assembly accuracy.

[0017] On the basis of the above technical solutions, the present invention can also be improved as follows.

[0018] Further, at least one end of the first tapered bolt is fixedly welded to the first guide rail or the second guide rail.

[0019] The beneficial effect of adopting the above further solution is: By welding and fixing, the loosening of the first tapered bolt is avoided (as long as the welding method is appropriate and the welding temperature rise is controlled, it will not cause damage to the bolt annealing and softening or the guide rail heat deformation). As long as the first tapered bolt does not loosen after the ultra-high-speed guide rail is assembled, the height difference h between the guide rail joint d and the working surface will not increase, and thus the accuracy will not be lost.

[0020] Further, the head of the first tapered bolt is welded to the first tapered hole, and the first screw rod is welded to the threaded hole.

[0021] Furthermore, a plurality of first tapered holes and first light holes which are correspondingly communicated are installed at intervals along the width direction of the first extension block, a plurality of threaded holes are installed at intervals along the width direction of the second extension block, and a corresponding plurality of the first tapered bolts are provided.

[0022] The beneficial effect of adopting the above further solution is: By providing a plurality of first tapered bolts, the reliability of the connection is ensured.

[0023] Furthermore, two first tapered holes and first light holes which are correspondingly communicated are installed at intervals along the width direction of the first extension block, two threaded holes are installed at intervals along the width direction of the second extension block, and two corresponding first tapered bolts are provided.

[0024] Furthermore, the taper angle of the first tapered bolt head is 90 degrees.

[0025] Furthermore, on the other side of the end of the first guide rail, there is also a third extension block extending outward along its length direction. A first vacancy is formed in the middle of the first guide rail. The second guide rail has the second extension block in the middle and a third vacancy on the other side. The third extension block is inserted into the third vacancy.

[0026] The beneficial effect of adopting the above further solution is: The first guide rail has a first extension block and a third extension block, forming a C-shaped structure at the end. The second extension block is inserted into the first vacancy between the first extension block and the third extension block. The splicing structure has strong stability and high structural strength.

[0027] Furthermore, the third extension block has a second light hole, the second light hole is coaxially arranged with the first light hole, the diameter of the second light hole is larger than the diameter of the threaded hole, and the second light hole is eccentrically arranged away from the second guide rail relative to the threaded hole. The first screw rod is inserted into the second light hole.

[0028] Furthermore, a second tapered bolt is further included. The third extension block has a second light hole and a second tapered hole which are coaxially arranged and communicated. The diameter of the second light hole is larger than the diameter of the threaded hole, and the second light hole is eccentrically arranged away from the second guide rail relative to the threaded hole. The second tapered bolt includes a second tapered bolt head and a second screw rod which are connected in sequence. The second screw rod passes through the second light hole and is threadedly connected with the threaded hole. The second tapered bolt head is located in the second tapered hole, and the taper angle of the second tapered bolt head is the same as that of the second tapered hole.

[0029] The beneficial effects of adopting the above further solution are as follows: The first extension block is locked and centered with the threaded hole through the first tapered bolt. The third extension block is locked and centered with the threaded hole through the second tapered bolt. In this way, the splicing accuracy of the first guide rail and the second guide rail is further ensured, it is not easy to become loose, and the structural stability is high.

[0030] The present invention also provides a high-precision splicing method for a super-high-speed guide rail, which is realized by adopting the high-precision splicing structure of the super-high-speed guide rail, and includes the following steps:

[0031] Step 1: Insert the first extension block into the second vacancy, and at the same time insert the second extension block into the first vacancy;

[0032] Step 2: Make the first screw of the first tapered bolt pass through the first light hole, and rotate the first tapered bolt to make it threadedly connected with the threaded hole. During the rotation of the first tapered bolt, the first tapered bolt head presses against the side wall of the first tapered hole, and the first guide rail and the second guide rail move towards each other and are locked.

[0033] The beneficial effects are as follows: The operation of splicing the guide rails is easy, and there is no need for complex and difficult-to-control operations such as on-site butt welding and grinding of the seams. The error of the guide rail seams is small, and the overall quality and performance stability of the assembled guide rails are high. Description of the Drawings

[0034] Figure 1 It is a schematic diagram of one of the docking structures of the guide rail in the prior art;

[0035] Figure 2 It is a schematic diagram of another docking structure of the guide rail in the prior art;

[0036] Figure 3 It is a schematic diagram of the structure of one of the docking structures of the guide rail in the prior art after offset;

[0037] Figure 4 It is a schematic diagram of the structure of another docking structure of the guide rail in the prior art after offset;

[0038] Figure 5 It is a cross-sectional view of the high-precision splicing structure of the super-high-speed guide rail in the second embodiment of the present invention;

[0039] Figure 6 For Figure 5 the top view of the high-precision splicing structure of the super-high-speed guide rail;

[0040] Figure 7 It is a schematic diagram of the spot welding positions of the high-precision splicing structure of the super-high-speed guide rail in the second embodiment of the present invention;

[0041] Figure 8This is the exploded view of the high-precision splicing structure of the ultra-high-speed guide rail in the second embodiment of the present invention. The first tapered bolt is not shown in the figure.

[0042] Figure 9 is Figure 8 the top view of the high-precision splicing structure of the ultra-high-speed guide rail.

[0043] Figure 10 is the cross-sectional view of the high-precision splicing structure of the ultra-high-speed guide rail in the fourth embodiment.

[0044] Figure 11 is the cross-sectional view of the high-precision splicing structure of the ultra-high-speed guide rail in the fifth embodiment.

[0045] In the drawings, the list of components represented by each reference numeral is as follows:

[0046] 1. First guide rail; 101. First extension block; 102. Third extension block; 2. Second guide rail; 201. Second extension block; 3. First tapered bolt; 4. Second tapered bolt; 5. Working surface; 6. Bolt hole for installation; 7. Spot welding position; 8. Fixed installation side. Detailed implementation manners

[0047] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0048] As Figures 1 - 4 shown, in the prior art, the installation of the guide rail mainly directly connects the straight edges of the main ends face to face. As Figure 1 and Figure 2 shown, the two sides of the guide rail are the working surfaces 5. Bolts pass through the bolt holes 6 for installation on the guide rail and fix the first guide rail 1 and the second guide rail 2 respectively. There is no direct connection relationship between the first guide rail 1 and the second guide rail 2. After long-term use, the guide rail shifts, resulting in or increasing the height difference h, and the width d of the guide rail joint increases.

[0049] Embodiment 1

[0050] As Figures 5 - 11 shown, this embodiment provides a high-precision splicing structure for an ultra-high-speed guide rail, which is characterized by including a first guide rail 1, a second guide rail 2, and a first tapered bolt 3.

[0051] One side of the end of the first guide rail 1 has a first extension block 101 extending outward along its length direction, and a first vacancy is formed on the other side or in the middle thereof. The first extension block 101 has a first tapered hole and a first optical hole coaxially arranged and communicated. One side of the end of the second guide rail 2 has a second vacancy, and the other side or in the middle thereof has a second extension block 201 extending outward along its length direction. The second extension block 201 has a threaded hole. The first extension block 101 is inserted into the second vacancy, and the second extension block 201 is inserted into the first vacancy.

[0052] The diameter of the first optical hole is larger than the diameter of the threaded hole, and the first optical hole is eccentrically arranged relative to the threaded hole in a direction away from the second guide rail 2. The first tapered bolt 3 includes a first tapered bolt head and a first screw rod connected in sequence. The first screw rod passes through the first optical hole and is threadedly connected with the threaded hole. The first tapered bolt head is located in the first tapered hole, and the taper angle α of the first tapered bolt head is the same as that of the first tapered hole.

[0053] In this solution, the first extension block 101 is inserted into the second vacancy, and the second extension block 201 is inserted into the first vacancy to realize the insertion positioning of the two guide rails. Subsequently, the first tapered bolt 3 passes through the first optical hole and is threadedly connected with the threaded hole. Since the first optical hole and the threaded hole are eccentrically arranged, during the process of screwing the first tapered bolt 3 into the threaded hole, the first tapered bolt head fits the shape of the first tapered hole and plays a centering role. The first tapered bolt head applies a radial force to the side wall of the first tapered hole, so that the first guide rail 1 and the second guide rail 2 move towards each other and are pressed tightly, and the first optical hole and the threaded hole have a tendency to move to the coaxial position.

[0054] The new guide rail joint structure form of the present invention solves the problem that the joint precision will decrease after use, and there is no need to butt-weld and polish the joint on site. The purpose of small guide rail joint error is achieved, and the overall quality and performance stability of the guide rail after assembly are improved. Specifically, it has the following advantages:

[0055] 1) After the first guide rail 1 and the second guide rail 2 are installed, the joint width is automatically tightened, improving the installation precision.

[0056] 2) Multiple guide rails can be connected into a whole by using this splicing structure, and it is not easy to be separated by external influence, and the joint position has higher structural stability.

[0057] 3) The structure is simple and easy to install, and there is no need for complex and difficult-to-control operations such as butt-welding and polishing the joint on site.

[0058] 4) The guide rail splicing precision is decoupled from the installation surface precision. The precision of the guide rail joint is not affected by the precision of the guide rail and the installation surface, and the joint precision of the guide rail completely depends on its own assembly precision.

[0059] Specifically, the length directions of the first guide rail 1 and the second guide rail 2 are Figure 5 and Figure 6 the X-axis direction shown. The first guide rail 1 and the second guide rail 2 are assembled into a guide rail group. The two sides of the guide rail group in the Y direction are working surfaces 5, as Figure 6 shown. One side of the guide rail group in the Z direction is a fixed installation side 8. The fixed installation side 8 can be fixedly connected to other components by various installation structural forms, such as setting bolt holes, clamping grooves, T-shaped structures or installation flanges and other structures on the fixed installation side 8.

[0060] Specifically, the manufacturing dimensions of the mating parts of the outer contours (except for the first tapered hole, the first light hole and the threaded hole) of the first guide rail 1 and the second guide rail 2 are the same, and the machining accuracies are the same. The dimensional accuracy of the guide rail ends is guaranteed by machining, which is very easy to achieve for the mechanical manufacturing technology of the guide rail.

[0061] Specifically, the diameter φW of the first light hole of the first guide rail 1 is larger than the nominal diameter Q of the threaded hole of the second guide rail 2 of the guide rail 2 by a certain size. The diameter φW needs to leave a moving margin in the X direction for step 2 of the splicing method.

[0062] Specifically, after the first guide rail 1 and the second guide rail 2 are inserted, since their outer dimensions are the same, the splicing seam is already in a relatively small state. The first light hole and the threaded hole are located at eccentric positions. After the first tapered bolt 3 is assembled, the X-direction component force of the first tapered bolt 3 on the first guide rail 1 further pulls the first guide rail 1 and the second guide rail 2 towards each other, reducing the splicing seam and improving the assembly accuracy. Among them, as Figure 8 shown, the dimension D1 is slightly larger than the dimension E2.

[0063] It should be noted that: the positions of the first tapered hole of the first guide rail 1 and the threaded hole of the second guide rail 2 need to avoid the working surfaces of the slider or the roller.

[0064] On the basis of the above technical solution, at least one end of the first tapered bolt 3 is fixedly welded to the first guide rail 1 or the second guide rail 2.

[0065] By welding and fixing, the loosening of the first tapered bolt 3 is avoided (as long as the welding method is appropriate and the welding temperature rise is controlled, it will not cause damage to the bolt annealing and softening or the guide rail heat deformation). As long as the first tapered bolt 3 does not loosen after the ultra-high-speed guide rail is assembled, the guide rail joint d and the height difference h of the working surface will not become larger, and thus the accuracy will not be lost.

[0066] Specifically, after the first tapered bolt 3 is tightened to reach the designed pre-tightening force, at least one end of the first tapered bolt 3 is fixed against loosening by spot welding. The welding needs to control the heat and the size of the heat-affected zone, such as laser welding or cold welding. Specifically, two weld spots can be set at one end of the first tapered bolt 3, or one weld spot can be set at each end of the first tapered bolt 3. When the working conditions of the guide rail are good or considering the maintenance and replacement of the guide rail, high-strength thread glue can also be used to replace the above-mentioned weld spots to play a role in fixing and preventing loosening.

[0067] On the basis of the above technical solution, a plurality of correspondingly connected first tapered holes and first light holes are installed at intervals along the width direction of the first extension block 101, a plurality of threaded holes are installed at intervals along the width direction of the second extension block 201, and a plurality of corresponding first tapered bolts 3 are provided.

[0068] Setting a plurality of first tapered bolts 3 ensures the reliability of the connection.

[0069] On the basis of the above technical solution, two correspondingly connected first tapered holes and first light holes are installed at intervals along the width direction of the first extension block 101, two threaded holes are installed at intervals along the width direction of the second extension block 201, and two corresponding first tapered bolts 3 are provided.

[0070] On the basis of the above technical solution, the taper angle α of the first tapered bolt head is 90 degrees.

[0071] Embodiment 2

[0072] As Figures 5 - 9 shown, on the basis of Embodiment 1, this embodiment provides a high-precision splicing structure for an ultra-high-speed guide rail. Another side of the end of the first guide rail 1 forms a first vacancy, and the other side of the end of the second guide rail 2 has a second extension block 201 extending outward along its length direction.

[0073] Specifically, the first extension block 101 is located on one side of the first guide rail 1 in the Y direction, the second extension block 201 is located on the other side of the second guide rail 2 in the Y direction, and the joint of the first guide rail 1 and the second guide rail 2 is in a Z shape.

[0074] Specifically, the total length of the first tapered bolt 3 is less than the total Y-direction thickness of the first extension block 101 and the second extension block 201, and both ends of the first tapered bolt 3 do not protrude from the first extension block 101 and the second extension block 201 to avoid affecting the operation of the slider on the guide rail.

[0075] Specifically, as Figure 8As shown, the Y-direction dimensions of the first guide rail 1 and the second guide rail 2 are both N, the Y-direction dimensions of the first extension block 101 and the second vacancy are both B, the Y-direction dimensions of the second extension block 201 and the first vacancy are both A, and the X-direction dimensions of the first extension block 101 and the second extension block 201 are both C.

[0076] In one specific example, the first tapered bolt head is welded to the first tapered hole, and the first screw rod is welded to the threaded hole.

[0077] Specifically, as Figure 7 shown, the black dot positions are the spot welding positions 7. The side wall of the end of the first tapered bolt head is welded to the side wall of the first tapered hole, and the side wall of the end of the first screw rod is welded to the side wall of the threaded hole. After welding, the height of the solder does not protrude from the height of the working surface of the guide rail.

[0078] Embodiment III

[0079] Based on Embodiment I, this embodiment provides a high-precision splicing structure for an ultra-high-speed guide rail. On the other side of the end of the first guide rail 1, there is also a third extension block 102 extending outward along its length direction. The first vacancy is formed in the middle of the first guide rail 1. The middle of the second guide rail 2 has the second extension block 201, and there is a third vacancy on the other side. The third extension block 102 is inserted into the third vacancy.

[0080] Specifically, the first extension block 101 and the third extension block 102 are respectively provided on both sides in the Y direction of the first guide rail 1, forming a C-shaped structure at the end. The second extension block 201 in the middle of the second guide rail 2 is inserted into the first vacancy between the first extension block 101 and the third extension block 102. The splicing structure has strong stability and high structural strength.

[0081] Embodiment IV

[0082] As Figure 10 shown, based on Embodiment III, the third extension block 102 has a second light hole, the second light hole is coaxially arranged with the first light hole, the diameter of the second light hole is larger than the diameter of the threaded hole, and the second light hole is eccentrically arranged relative to the threaded hole in a direction away from the second guide rail 2. The first screw rod is inserted into the second light hole.

[0083] Specifically, the total length of the first tapered bolt 3 is less than the total Y-direction thickness of the first guide rail 1, and both ends of the first tapered bolt 3 do not protrude from the first extension block 101 and the third extension block 102, so as not to affect the operation of the slider on the guide rail.

[0084] In one specific example, the first tapered bolt head is welded to the first tapered hole, and the first screw rod is welded to the second light hole.

[0085] Embodiment V

[0086] As Figure 11 shown, on the basis of the third embodiment, the high-precision splicing structure of the ultra-high-speed guide rail further includes a second tapered bolt 4. The third extension block 102 has a second optical hole and a second tapered hole that are coaxially arranged and communicated. The diameter of the second optical hole is larger than the diameter of the threaded hole, and the second optical hole is eccentrically arranged relative to the threaded hole in a direction away from the second guide rail 2. The second tapered bolt 4 includes a second tapered bolt head and a second screw rod connected in sequence. The second screw rod passes through the second optical hole and is threadedly connected to the threaded hole. The second tapered bolt head is located in the second tapered hole, and the taper angle of the second tapered bolt head is the same as that of the second tapered hole.

[0087] The first extension block 101 is locked and centered with the threaded hole through the first tapered bolt 3. The third extension block 102 is locked and centered with the threaded hole through the second tapered bolt 4. In this way, the splicing accuracy of the first guide rail 1 and the second guide rail 2 is further ensured, it is not easy to loosen, and the structural stability is high.

[0088] Furthermore, the second tapered bolt 4 and the first tapered bolt 3 can be selected from bolts of the same model, and the diameter of the second optical hole is the same as the diameter of the first optical hole.

[0089] In one specific example, the first tapered bolt head is welded to the first tapered hole, and the second tapered bolt head is welded to the second tapered hole.

[0090] Embodiment Six

[0091] On the basis of any one of Embodiments 1 to 5, this embodiment further provides a high-precision splicing method for an ultra-high-speed guide rail, which is realized by using the high-precision splicing structure of the ultra-high-speed guide rail, and includes the following steps:

[0092] Step 1: Insert the first extension block 101 into the second vacancy, and at the same time insert the second extension block 201 into the first vacancy;

[0093] Step 2: Make the first screw rod of the first tapered bolt 3 pass through the first optical hole, and rotate the first tapered bolt 3 to make it threadedly connected to the threaded hole. During the rotation of the first tapered bolt 3, the first tapered bolt head presses against the side wall of the first tapered hole, and the first guide rail 1 and the second guide rail 2 move towards each other and are locked.

[0094] The beneficial effects are as follows: The guide rail splicing operation is easy, and there is no need for complex and difficult-to-control operations such as on-site butt joint welding and grinding. The guide rail joint gap error is small, and the overall quality and performance stability of the assembled guide rail are high.

[0095] When the first guide rail 1 is spliced with the second guide rail 2, the shapes of the ends of the two guide rails are adapted to each other and are buckled together, and the first tapered bolt 3 is tightened and fixed to the threaded hole. As the first tapered bolt 3 is tightened, the right side of the tapered surface of the first tapered bolt head will position and press the right side of the first tapered hole of the first guide rail 1 (as Figure 5 shown). The pre-tightening force of the bolt generates a horizontal component force (in the X direction) through the tapered surface, and the horizontal component force will press the first guide rail 1 in the direction towards the second guide rail 2. The pre-tightening force of the bolt is in the Y direction, pressing the two guide rails in the Y direction. Due to the centering of the tapered surface, the Z direction of the guide rails will also tend to be centered due to the guiding action of the first tapered bolt head, and a certain installation accuracy is obtained.

[0096] For the technical solution of Embodiment 5, the high-precision splicing method further includes: Step 3: Pass the second screw of the second tapered bolt 4 through the second light hole, and rotate the second tapered bolt 4 so that its threaded hole is threadedly connected. During the process of rotating the second tapered bolt 4, the second tapered bolt head presses the side wall of the second tapered hole, and the first guide rail 1 and the second guide rail 2 move towards each other and are locked.

[0097] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "X", "Y", "Z", etc. is based on the orientation or positional relationship shown in the drawings, and 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 a limitation of the present invention.

[0098] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0099] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0100] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0101] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-precision splicing structure for a super-high-speed guide rail, characterized in that, It includes a first guide rail (1), a second guide rail (2), a first tapered bolt (3) and a second tapered bolt (4). The ultra-high-speed guide rail includes a guide rail for the aerospace test field, a guide rail for the ultra-high-speed operation test field, a guide rail for electromagnetic catapult or electromagnetic launch, or a guide rail for high-speed launch, and its operating speed is above Mach 1. The length direction of the first guide rail (1) and the second guide rail (2) is the X direction. The first guide rail (1) and the second guide rail (2) are assembled into a guide rail group. The two sides of the guide rail group in the Y direction are working surfaces (5), and one side of the guide rail group in the Z direction is a fixed installation side (8); one side of the end of the first guide rail (1) in the Y direction has a first extension block (101) extending outward in the X direction, and the other side of the end of the first guide rail (1) in the Y direction has a third extension block (102) extending outward in the X direction. A first vacancy is formed in the middle of the first guide rail (1) in the Y direction. The first extension block (101) has a first tapered hole and a first optical hole coaxially arranged and communicating; the middle of the second guide rail (2) in the Y direction has a second extension block (201). One side of the end of the second guide rail (2) in the Y direction has a second vacancy, and the other side in the Y direction has a third vacancy. The third extension block (102) has a second optical hole and a second tapered hole coaxially arranged and communicating. The second extension block (201) has a threaded hole. The first extension block (101) is inserted into the second vacancy, the second extension block (201) is inserted into the first vacancy, and the third extension block (102) is inserted into the third vacancy; the side walls on both sides of the first guide rail (1) in the Y direction are flush with the side walls on both sides of the second guide rail (2) in the Y direction. The diameter of the first optical hole is larger than the diameter of the threaded hole, and the first optical hole is eccentrically arranged in a direction away from the second guide rail (2) relative to the threaded hole. The first tapered bolt (3) includes a first tapered bolt head and a first screw rod connected in sequence. The first screw rod passes through the first optical hole and is threadedly connected to the threaded hole. The first tapered bolt head is located in the first tapered hole, and the taper angle of the first tapered bolt head is the same as that of the first tapered hole. The first tapered bolt (3) is arranged in the Y direction. The diameter of the second optical hole is larger than the diameter of the threaded hole, and the second optical hole is eccentrically arranged in a direction away from the second guide rail (2) relative to the threaded hole. The second tapered bolt (4) includes a second tapered bolt head and a second screw rod connected in sequence. The second screw rod passes through the second optical hole and is threadedly connected to the threaded hole. The second tapered bolt head is located in the second tapered hole, and the taper angle of the second tapered bolt head is the same as that of the second tapered hole. At least one end of the first tapered bolt (3) is fixedly welded to the first guide rail (1) or the second guide rail (2); the first tapered bolt head is welded to the first tapered hole, and the first screw rod is welded to the threaded hole. Two correspondingly communicating first tapered holes and first light holes are installed at intervals along the Z direction on the first extension block (101), and two threaded holes are installed at intervals along the Z direction on the second extension block (201), and two corresponding first tapered bolts (3) are provided; The high-precision splicing method of the ultra-high-speed guide rail comprises the following steps: Step 1: Insert the first extension block (101) into the second vacancy, and at the same time insert the second extension block (201) into the first vacancy; Step 2: Make the first screw rod of the first tapered bolt (3) pass through the first light hole, and rotate the first tapered bolt (3) to threadedly connect it with the threaded hole. During the rotation of the first tapered bolt (3), the first tapered bolt head presses against the side wall of the first tapered hole, and the first guide rail (1) and the second guide rail (2) move towards each other and are locked.

2. The high-precision splicing structure of an ultra-high-speed guide rail according to claim 1, characterized in that, The cone angle of the first tapered bolt head is 90 degrees.

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