Electron beam welding fixture

Abstract

The present invention relates to the technical field of welding fixtures, and in particular to an electron beam welding fixture, comprising a base, a movable groove is opened on one side of the upper outer surface of the base, a threaded rod is rotatably installed inside the movable groove, a movable plate is movably installed on the outer surface of the threaded rod, a motor is fixedly installed on the upper outer surface of the movable plate, a transmission wheel is fixedly installed on the output end of the motor, and a main fixed plate is fixedly installed on the upper outer surface of the movable plate near the output end of the motor, a main chuck is movably installed inside the main fixed plate, the main chuck of the device can move and can clamp cylindrical materials of different diameters to achieve the effect of welding materials of different sizes, and at the same time, the chuck can rotate synchronously in the fixed plate while clamping the material, so that the electron beam can weld a circle of the outer surface of the cylindrical material, thereby realizing the advantages of the device when used multifunctionally.

Description

Technical Field

[0001] The invention relates to the technical field of welding fixtures, in particular to an electron beam welding fixture. Background Art

[0002] Electron beam welding technology is an important part of high-energy beam processing technology. It is a welding method that uses the heat energy generated by the bombardment of the weldment placed in a vacuum or non-vacuum by an accelerated and focused electron beam. Electron beam welding has the characteristics of no need for welding rods, not easy to oxidize, high input energy density, small heating area, fast welding speed, narrow weld heat affected zone, small workpiece deformation, etc., as well as deep electron beam penetration, large weld depth-to-width ratio, convenient electron beam control, good process repeatability, and no contamination of the weld in a vacuum environment. Therefore, it is widely used in many industries such as aerospace, atomic energy, national defense and military industry, automobiles, and electrical and electrical instruments.

[0003] In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art that have not been solved: 1. The clamps currently used for electron beam welding are fixed and non-adjustable, so only materials of fixed size can be welded. When materials of different sizes need to be welded, different clamp devices need to be replaced, and the operation method is cumbersome, which reduces the efficiency of the welding process; 2. Electron beam welding needs to be carried out in a vacuum environment. When welding cylindrical materials in a vacuum chamber, because the electron beam generator is a fixed device, it is impossible to weld a circle of the cylinder. The clamp needs to have the function of rotating the material to rotate the cylindrical material to complete the welding.

[0004] To this end, an electron beam welding fixture is proposed. Summary of the invention

[0005] The object of the present invention is to provide an electron beam welding fixture, the main chuck of which can move and can clamp cylindrical materials of different diameters to achieve the purpose of welding materials of different sizes. At the same time, the chuck can rotate synchronously in a fixed plate while clamping the material, so that the electron beam can weld a circle of the outer surface of the cylindrical material, thereby solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: an electron beam welding fixture, comprising a base, a movable groove is opened on one side of the upper outer surface of the base, a threaded rod is rotatably installed inside the movable groove, a movable plate is movably installed on the outer surface of the threaded rod, a motor is fixedly installed on the upper outer surface of the movable plate, a transmission wheel is fixedly installed on the output end of the motor, and a main fixed plate is fixedly installed on the upper outer surface of the movable plate near the output end of the motor, a main chuck is movably installed inside the main fixed plate, and the transmission wheel on the output end of the motor is embedded in the center position of the main chuck, a caliper is movably installed on the outer surface of one side of the main chuck, a straight shaft is arranged at the center position of the caliper, a secondary fixed plate is fixedly installed on the other side of the upper outer surface of the base, a secondary chuck is movably installed inside the secondary fixed plate, a gear is arranged at the center position of the secondary chuck, and a telescopic rod is fixedly installed on the lower position of one end of the upper outer surface of the base near the straight shaft;

[0007] The telescopic rod is slidably connected by a lead screw; a straight groove is provided in the extension shaft of the telescopic rod; the side of the straight groove close to the top of the extension shaft of the telescopic rod is of arc-shaped design; the arc-shaped surface at the top of the straight groove is used for slidably connecting swivels of different diameters; the outer surfaces of the swivels are fixedly connected with uniformly arranged toothed plates; a first gear is rotatably connected to the lower part of the swivel in the inner wall of the straight groove through a first rotating rod, and the rotating rod extends to the outside of the telescopic rod; a grinding block is fixedly connected to the outer surface of the first rotating rod, and the grinding block is of conical design and extends to the joint between the straight shaft and the gear; uniformly arranged rubber strips are fixedly connected to the conical surface of the grinding block; a second rotating rod is rotatably connected to the lower part of the first gear in the straight groove, and the second rotating rod is connected to the first rotating rod through a belt; the second rotating rod extends out of the telescopic rod design; a second gear is fixedly connected to the outer surface of the second rotating rod, and the second gear and the gear are meshed with each other;

[0008] By adopting the above technical solution, the main chuck of the device can move and clamp cylindrical materials of different diameters to achieve the effect of welding materials of different sizes. At the same time, the chuck can rotate synchronously in the fixed plate while clamping the material, so that the electron beam can weld the outer surface of the cylindrical material in one circle;

[0009] When welding spur shafts and gears of different specifications, firstly, sleeve the swivel that matches the spur shaft and the gear on the outer surface of the spur shaft, then place the swivel in the arc surface at the top of the straight groove, and then use the main chuck to clamp the spur shaft. In this process, the spur shaft can be supported to prevent the spur shaft from being offset when the main chuck is clamped, thereby increasing the axis runout of the spur shaft and increasing the difficulty of welding. When the motor drives the spur shaft to rotate, the swivel will drive the swivel to rotate. Since the outer surface of the swivel is fixedly connected with evenly arranged tooth plates, the first gear can be driven to rotate during the rotation of the tooth plate, and the grinding block can be driven to rotate during the rotation of the first gear. During the rotation of the grinding block, the welds formed by the spur shaft and the gear are polished to prevent the welds from having different thicknesses. The invention relates to a method for making the welding of the gear wheel a plurality of parts, wherein the plurality of parts are connected to the groove of the groove of the groove and the groove of the gear wheel ... and the groove of the gear wheel are connected to the groove of the groove and the groove of the groove of the groove and the groove of the gear wheel are connected to the groove of the groove and the groove of the groove of the groove and the groove of the gear wheel are connected to the groove of the groove and the groove of the groove of the groove and the groove of the gear wheel are connected to the groove of the groove and the groove of the groove of the groove and the groove of the groove of the groove and the groove of the groove of the groove and the groove of the groove of the groove and the groove of the groove of the groove and the groove of the groove of the groove and the groove of the groove of the groove and the groove of the groove of the groove and the groove of the groove of the groove and the groove of the groove of the groove and the groove of the groove of the groove and the groove of the groove of the groove and the groove of the groove of the groove and the groove of the groove of the groove and the groove of the groove and the groove of the groove and the groove of the groove and the groove of the groove and the groove of the groove and the groove of the groove and the groove of the groove and the groove of the groove and the groove of the groove and the groove of the groove and the groove of the groove and the groove of the groove and the groove of the groove and the groove of the groove and the

[0010] Preferably, an annular groove is provided inside the main fixing plate, a sliding block is fixedly mounted on the outer surface of the main chuck, and the sliding block cooperates with the annular groove, and the main fixing plate is rotatably connected to the main chuck.

[0011] By adopting the above technical solution, the main chuck can rotate inside the main fixed plate, and the cooperation between the slider and the annular groove can reduce the friction resistance during rotation.

[0012] Preferably, the auxiliary fixing plate and auxiliary chuck are of equal size to the main fixing plate and main chuck, and are symmetrically distributed on the outer surface of the upper end of the base.

[0013] By adopting the above technical solution, when the same main chuck and auxiliary chuck clamp cylindrical materials, under the action of the caliper, the center line of the material always remains collinear with the center lines of the main chuck and the auxiliary chuck.

[0014] Preferably, the number of the threaded rods is two, and they are symmetrically distributed with the center of the movable groove as the midpoint.

[0015] By adopting the above technical solution, when the two threaded rods drive the movable plate to move, not only the moving direction of the movable plate can be controlled, but also the movement of the movable plate can be made more stable.

[0016] Preferably, a threaded hole is provided inside the movable plate, and the threaded rod is threadedly connected to the threaded hole.

[0017] By adopting the above technical solution, the movable plate is threadedly connected to the threaded rod, and the position of the movable plate can be adjusted by rotating the threaded rod. When the threaded rod is stationary, the movable plate also remains stationary.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By adding a series of device components such as movable grooves, threaded rods, movable plates, main fixed plates, and main chucks to the device, the position of the movable plate can be adjusted by rotating the threaded rods when the device is in use, and the distance between the main fixed plate and the auxiliary fixed plate can be changed. Straight shafts of different lengths can be installed, and the main chuck and the auxiliary chuck can clamp straight shafts and gears of different diameters. The straight shaft can be kept from deforming at the end that is not clamped by the telescopic rod, so that the device can process materials of different sizes;

[0020] 2. By adding a series of device components such as a fixed plate, a main chuck, a slide groove, a slider, a motor, and a transmission wheel to the device, when the device is in use, after the fixture completes clamping the spur shaft and the gear, the position of the movable plate is adjusted to make the spur shaft and the corresponding end of the gear fit tightly, and the electron beam generator and the motor are started. When the electron beam welds the spur shaft and the gear, the motor drives the main chuck to rotate, and the main chuck drives the spur shaft to rotate. When the spur shaft and the gear are tightly connected, the spur shaft drives the gear and the auxiliary chuck to rotate together, so that the electron beam can weld the position where the spur shaft and the gear need to be welded, so that the electron beam welding can achieve the effect of processing cylindrical materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is the overall structural view of the present invention;

[0023] Figure 2 A combined view of the base and the movable plate of the present invention;

[0024] Figure 3 A combined view of the movable plate and the fixed plate of the present invention;

[0025] Figure 4 It is a combined view of the telescopic rod and the bearing of the present invention;

[0026] Figure 5 A combined view of the support frame and the bearing of the present invention;

[0027] Figure 6 For the present invention Figure 1 A partial enlarged view of the middle part;

[0028] Description of reference numerals:

[0029] 1. Base; 2. Movable groove; 3. Threaded rod; 4. Movable plate; 5. Motor; 51. Transmission wheel; 6. Main fixed plate; 61. Annular slide groove; 7. Main chuck; 71. Caliper; 72. Slider; 8. Straight shaft; 9. Gear; 10. Telescopic rod; 11. Support frame; 12. Bearing; 13. Auxiliary fixed plate; 14. Auxiliary chuck; 101. Straight groove; 102. Swivel; 103. Tooth plate; 104. First gear; 105. Grinding block; 106. Rubber strip; 107. Belt; 108. Second gear. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 6 , the present invention provides a technical solution:

[0032] like Figure 1 and Figure 6As shown, an electron beam welding fixture comprises a base 1, a movable groove 2 is provided on one side of the upper outer surface of the base 1, a threaded rod 3 is rotatably installed inside the movable groove 2, a movable plate 4 is movably installed on the outer surface of the threaded rod 3, a motor 5 is fixedly installed on the upper outer surface of the movable plate 4, a transmission wheel 51 is fixedly installed on the output end of the motor 5, and a main fixed plate 6 is fixedly installed on the upper outer surface of the movable plate 4 near the output end of the motor 5, a main chuck 7 is movably installed inside the main fixed plate 6, and the transmission wheel 51 on the output end of the motor 5 is embedded in the center position of the main chuck 7, a caliper 71 is movably installed on the outer surface of one side of the main chuck 7, and a straight shaft 8 is provided at the center position of the caliper 71, a secondary fixed plate 13 is fixedly installed on the other side of the upper outer surface of the base 1, a secondary chuck 14 is movably installed inside the secondary fixed plate 13, and a gear 9 is provided at the center position of the secondary chuck 14, and a telescopic rod 10 is fixedly installed at a position below one end of the upper outer surface of the base 1 near the straight shaft 8. The telescopic rod 10 is connected by sliding through a lead screw; a straight groove 101 is provided in the extension shaft of the telescopic rod 10; the side of the straight groove 101 close to the top of the extension shaft of the telescopic rod 10 is designed in an arc shape; the arc surface at the top of the straight groove 101 is used for sliding connection of swivels 102 of different diameters; the outer surface of the swivel 102 is fixedly connected with uniformly arranged tooth plates 103; the lower part of the swivel 102 is rotatably connected with a first gear 104 in the inner wall of the straight groove 101 through a first rotating rod, and the rotating rod extends to the outside of the telescopic rod 10; A grinding block 105 is fixedly connected to the outer surface of the first rotating rod, and the grinding block 105 is conical in design and extends to the place where the straight shaft 8 and the gear are in contact; uniformly arranged rubber strips 106 are fixedly connected to the conical surface of the grinding block 105; a second rotating rod is rotatably connected in the straight groove 101 below the first gear 104, and the second rotating rod is connected to the first rotating rod through a belt 107; the second rotating rod extends out of the telescopic rod 10 design; a second gear 108 is fixedly connected to the outer surface of the second rotating rod, and the second gear 108 is meshed with the gear.

[0033] By adopting the above technical solution, the main chuck 7 of the device can move and can clamp cylindrical materials of different diameters, so as to achieve the effect of welding materials of different sizes. At the same time, the chuck can rotate synchronously in the fixed plate while clamping the material, so that the electron beam can weld the outer surface of the cylindrical material in one circle;

[0034] When welding the spur shaft 8 and the gear 9 of different specifications, firstly, the rotating ring 102 matching with the spur shaft 8 and the gear 9 is sleeved on the outer surface of the spur shaft 8, and then the rotating ring 102 is placed in the arc surface at the top of the straight groove 101, and then the spur shaft 8 is clamped by the main chuck 7. In this process, the spur shaft 8 can be supported, so as to prevent the spur shaft 8 from being offset when the main chuck 7 is clamped, thereby increasing the axis runout of the spur shaft 8 and increasing the difficulty of welding. When the motor 5 drives the spur shaft 8 to rotate, the spur shaft 8 will drive the rotating ring 102 to rotate. Since the outer surface of the rotating ring 102 is fixedly connected with the uniformly arranged tooth plates 103, the first gear 104 can be driven to rotate during the rotation of the tooth plate 103. When the first gear 104 rotates, the grinding block 105 can be driven to rotate. During the rotation of the grinding block 105, the welding points between the spur shaft 8 and the gear 9 are polished. This prevents the welding spots from being uneven in thickness and affecting the welding effect. At the same time, the residue attached to the welding spots can be peeled off to prevent the welding strength from being affected by the presence of welding slag during continuous welding. Since the conical surface is fixedly connected with evenly arranged rubber strips 106, the evenly arranged rubber strips 106 can clean the welding point between the straight shaft 8 and the gear 9 during the rotation of the grinding block 105, thereby further cleaning the welding slag at the welding point to prevent excessive welding slag from affecting the welding effect. Since the second gear 108 is meshed with the gear 9, the belt 107 can be used to drive the second rotating rod to rotate during the rotation of the first rotating rod, and the second rotating rod drives the second gear 108 to drive the gear to rotate. In this process, insufficient friction between the straight shaft 8 and the gear 9 can be prevented, resulting in the gear 9 being unable to rotate with the straight shaft 8, thereby affecting the welding process of the straight shaft 8 and the gear 9.

[0035] Specifically, an annular groove 61 is provided inside the main fixing plate 6 , a slider 72 is fixedly installed on the outer surface of the main chuck 7 , and the slider 72 cooperates with the annular groove 61 , and the main fixing plate 6 is rotatably connected to the main chuck 7 .

[0036] By adopting the above technical solution, the main chuck 7 can rotate inside the main fixing plate 6, and the cooperation between the slider 72 and the annular slide groove 61 can reduce the friction resistance during rotation.

[0037] Specifically, the auxiliary fixing plate 13 , the auxiliary chuck 14 , the main fixing plate 6 , and the main chuck 7 are of equal size and structure, and are symmetrically distributed on the outer surface of the upper end of the base 1 .

[0038] By adopting the above technical solution, when the same main chuck 7 and auxiliary chuck 14 clamp cylindrical materials, under the action of the caliper 71, the center line of the material always remains collinear with the center lines of the main chuck 7 and auxiliary chuck 14.

[0039] Specifically, the number of the threaded rods 3 is two, and they are symmetrically distributed with the center of the movable groove 2 as the midpoint.

[0040] By adopting the above technical solution, when the two threaded rods 3 drive the movable plate 4 to move, not only the moving direction of the movable plate 4 can be controlled, but also the movement of the movable plate 4 can be made more stable.

[0041] Specifically, a threaded hole is provided inside the movable plate 4 , and the threaded rod 3 is threadedly connected to the threaded hole.

[0042] By adopting the above technical solution, the movable plate 4 is threadedly connected to the threaded rod 3. The position of the movable plate 4 can be adjusted by rotating the threaded rod 3. When the threaded rod 3 does not move, the movable plate 4 also remains stationary.

[0043] Working principle: By adding a series of device components such as movable groove 2, threaded rod 3, movable plate 4, main fixed plate 6, main chuck 7, etc. to the device, when the device is in use, the position of the movable plate 4 can be adjusted by rotating the threaded rod 3, the distance between the main fixed plate 6 and the auxiliary fixed plate 13 can be changed, and the straight shaft 8 of different lengths can be installed. The main chuck 7 and the auxiliary chuck 14 can clamp the straight shaft 8 and gear 9 of different diameters. The telescopic rod 10 can be used to connect with the non-clamped end of the straight shaft 8 to keep the straight shaft 8 from deforming, so that the device can process materials of different sizes. By adding a fixed plate, main chuck 7, A series of device components such as the slide groove, the slider 72, the motor 5, the transmission wheel 51, etc., after the fixture completes the clamping of the straight shaft 8 and the gear 9, adjust the position of the movable plate 4 so that the straight shaft 8 and the corresponding end of the gear 9 are closely fitted, start the electron beam generator and the motor 5, and when the electron beam is welding the straight shaft 8 and the gear 9, the motor 5 drives the main chuck 7 to rotate, and the main chuck 7 drives the straight shaft 8 to rotate. When the straight shaft 8 and the gear 9 are closely connected, the straight shaft 8 drives the gear 9 and the auxiliary chuck 14 to rotate together, so that the electron beam can weld the straight shaft 8 and the gear 9 at the position where welding is required, so that the electron beam welding can process cylindrical materials;

[0044] When welding the spur shaft 8 and the gear 9 of different specifications, firstly, the rotating ring 102 matching with the spur shaft 8 and the gear 9 is sleeved on the outer surface of the spur shaft 8, and then the rotating ring 102 is placed in the arc surface at the top of the straight groove 101, and then the spur shaft 8 is clamped by the main chuck 7. In this process, the spur shaft 8 can be supported, so as to prevent the spur shaft 8 from being offset when the main chuck 7 is clamped, thereby increasing the axis runout of the spur shaft 8 and increasing the difficulty of welding. When the motor 5 drives the spur shaft 8 to rotate, the spur shaft 8 will drive the rotating ring 102 to rotate. Since the outer surface of the rotating ring 102 is fixedly connected with the uniformly arranged tooth plates 103, the first gear 104 can be driven to rotate during the rotation of the tooth plate 103. When the first gear 104 rotates, the grinding block 105 can be driven to rotate. During the rotation of the grinding block 105, the welding points between the spur shaft 8 and the gear 9 are polished. This prevents the welding spots from being uneven in thickness and affecting the welding effect. At the same time, the residue attached to the welding spots can be peeled off to prevent the welding strength from being affected by the presence of welding slag during continuous welding. Since the conical surface is fixedly connected with evenly arranged rubber strips 106, the evenly arranged rubber strips 106 can clean the welding point between the straight shaft 8 and the gear 9 during the rotation of the grinding block 105, thereby further cleaning the welding slag at the welding point to prevent excessive welding slag from affecting the welding effect. Since the second gear 108 is meshed with the gear 9, the belt 107 can be used to drive the second rotating rod to rotate during the rotation of the first rotating rod, and the second rotating rod drives the second gear 108 to drive the gear to rotate. In this process, insufficient friction between the straight shaft 8 and the gear 9 can be prevented, resulting in the gear 9 being unable to rotate with the straight shaft 8, thereby affecting the welding process of the straight shaft 8 and the gear 9.

[0045] The model of motor 5 is: XD-3420-2.

[0046] The electrical components appearing in this article are all connected to the external main controller and 220V AC power through a transformer, and the main controller can be a conventional known device that controls a computer, etc. The product model provided by the present invention is only used for the technical solution according to the structural characteristics of the product. The product will be adjusted and modified after purchase to make it more matching and consistent with the technical solution of the present invention. It is a technical solution for the best application of the technical solution. The model of its product can be replaced and modified according to the required technical parameters, which is well known to technical personnel in this field. Therefore, technical personnel in this field can clearly obtain the corresponding use effect through the technical solution provided by the present invention.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electron beam welding fixture, comprising a base (1), characterized in that: A movable groove (2) is provided on one side of the outer surface of the upper end of the base (1), a threaded rod (3) is rotatably mounted inside the movable groove (2), a movable plate (4) is movably mounted on the outer surface of the threaded rod (3), a motor (5) is fixedly mounted on the outer surface of the upper end of the movable plate (4), a transmission wheel (51) is fixedly mounted on the output end of the motor (5), and a main fixed plate (6) is fixedly mounted on the outer surface of the upper end of the movable plate (4) near the output end of the motor (5), a main chuck (7) is movably mounted inside the main fixed plate (6), and the transmission wheel (51) on the output end of the motor (5) is embedded in the center of the main chuck (7), a caliper (71) is movably mounted on the outer surface of one side of the main chuck (7), and a straight shaft (8) is provided at the center of the caliper (71), and a secondary fixed plate (13) is fixedly mounted on the other side of the outer surface of the upper end of the base (1), and the inner portion of the secondary fixed plate (13) is fixedly mounted on the outer surface of the upper end of the base (1). A secondary chuck (14) is movably mounted, a gear (9) is arranged at the center of the secondary chuck (14), a telescopic rod (10) is fixedly mounted at a position below one end of the upper outer surface of the base (1) close to the straight shaft (8), and the telescopic rod (10) is slidably connected via a lead screw; a straight groove (101) is provided in the extension shaft of the telescopic rod (10); a side of the straight groove (101) close to the top of the extension shaft of the telescopic rod (10) is in an arc shape; the straight groove ( The arc-shaped surface at the top of the straight groove (101) is used for sliding connection with rotating rings (102) of different diameters; the outer surface of the rotating ring (102) is fixedly connected with uniformly arranged tooth plates (103); the lower part of the rotating ring (102) is rotatably connected with a first gear (104) in the inner wall of the straight groove (101) through a first rotating rod, and the rotating rod extends to the outside of the telescopic rod (10); the outer surface of the first rotating rod is fixedly connected with a grinding block (105), and the grinding block (105) is of a conical design and extends to the straight groove (101). The shaft (8) and the gear are in contact; the conical surface of the grinding block (105) is fixedly connected with uniformly arranged rubber strips (106); a second rotating rod is rotatably connected in the straight groove (101) below the first gear (104), and the second rotating rod is connected to the first rotating rod through a belt (107); the second rotating rod extends out of the telescopic rod (10) design; a second gear (108) is fixedly connected to the outer surface of the second rotating rod, and the second gear (108) and the gear are meshed with each other; during the rotation of the first rotating rod, the second rotating rod can be driven to rotate by the belt (107), and the second rotating rod drives the second gear (108) to drive the gear to rotate, so as to prevent insufficient friction between the straight shaft (8) and the gear (9); When in use, the position of the movable plate (4) can be adjusted by rotating the threaded rod (3) to change the distance between the main fixed plate (6) and the auxiliary fixed plate (13), so that the straight shaft (8) of different lengths can be installed. The main chuck (7) and the auxiliary chuck (14) can clamp the straight shaft (8) and the gear (9) of different diameters. The straight shaft (8) can be kept from deforming by the telescopic rod (10) and the non-clamped end of the straight shaft (8). After the clamp has clamped the straight shaft (8) and the gear (9), the position of the movable plate (4) is adjusted to make the straight shaft (8) ) is tightly fitted with one end corresponding to the gear (9), and the electron beam generator and the motor (5) are started. When the electron beam is welding the straight shaft (8) and the gear (9), the motor (5) drives the main chuck (7) to rotate, and the main chuck (7) drives the straight shaft (8) to rotate. When the straight shaft (8) and the gear (9) are tightly connected, the straight shaft (8) drives the gear (9) and the auxiliary chuck (14) to rotate together, so that the electron beam can weld the straight shaft (8) and the gear (9) at the positions where welding is required, so that the electron beam welding can achieve the effect of processing cylindrical materials; An annular groove (61) is provided inside the main fixed plate (6), a slider (72) is fixedly installed on the outer surface of the main chuck (7), and the slider (72) and the annular groove (61) cooperate with each other. The main fixed plate (6) and the main chuck (7) are rotatably connected, and the main chuck (7) can rotate inside the main fixed plate (6), and the cooperation between the slider (72) and the annular groove (61) can reduce the friction resistance during rotation.

2. The electron beam welding fixture according to claim 1, characterized in that: The auxiliary fixing plate (13), the auxiliary chuck (14), the main fixing plate (6), and the main chuck (7) are of equal size and structure, and are symmetrically distributed on the outer surface of the upper end of the base (1).

3. The electron beam welding fixture according to claim 1, characterized in that: The number of the threaded rods (3) is two, and they are symmetrically distributed with the center of the movable groove (2) as the midpoint.

4. The electron beam welding fixture according to claim 1, characterized in that: A threaded hole is provided inside the movable plate (4), and the threaded rod (3) is threadedly connected to the threaded hole.

5. The electron beam welding fixture according to claim 1, characterized in that: The bearing (12) is movably connected to the outer surface of the straight shaft (8), and the telescopic rod (10) and the straight shaft (8) are arranged parallel to each other.

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