A driving system for local vacuum electron beam welding device

Abstract

The present invention provides a drive system for a local vacuum electron beam welding device, comprising: a base, a sliding device, a local sealing device, and a pressure device, wherein the sliding device comprises a first sliding plate and a first driving device, the first driving device being capable of driving the first sliding plate to move on the base, the local sealing device comprising a sealing plate, and the pressure device comprising a second sliding plate and a second driving device, the second driving device being capable of driving the second sliding plate to change the pressure at the connection between the local sealing device and the first sliding plate or the workpiece to be welded. The drive system for the vacuum electron beam welding device described in the present invention has an ingenious structure, is convenient for installing and replacing the workpiece to be welded, is easy to operate, and can be applied to the welding of various large-sized parts, further improving the reliability of the promotion and application of vacuum electron beam welding technology.

Description

Technical Field

[0001] The present invention relates to the technical field of electron beam welding, in particular to a driving system for a local vacuum electron beam welding device. Background Art

[0002] As countries around the world pay more and more attention to their maritime rights and interests, and as the development of marine resources intensifies, the manufacturing of new ships, offshore oil extraction, and large wind turbines has developed rapidly, and the demand for welding of thick and large workpieces is increasing. At present, the welding processes for thick and large workpieces are mainly traditional argon arc welding, submerged arc welding, etc.

[0003] Local low vacuum electron beam welding is a fusion welding method that has developed rapidly with the development of modern science and technology. The electron beam has a very high energy density, a high weld depth-to-width ratio of up to 15:1, a small heat-affected zone, small workpiece deformation, and fine grains. The thickness of the welded metal ranges from 1 to 150 mm. No groove is opened, and generally no welding wire is added. The weld can be completed in one go with good weld quality, which is unattainable by other welding methods.

[0004] However, this type of welding requires a low vacuum environment to be performed. For welding large-sized pipes used in ship systems, the weld seam after welding must move relative to the weld seam of the vacuum electron beam welding. Patent application number CN105397261B discloses a mobile local low-vacuum cold cathode electron beam welding device, comprising: a gantry, the gantry including two spaced-apart columns connected at their upper ends by a crossbeam, with a processing space between the two columns accommodating the welding workpiece; a cold cathode electron gun movably suspended on the crossbeam; a low-vacuum sealed drag hood placed on the welding workpiece, the upper portion of which is integrally connected to the lower end of the cold cathode electron gun and moves synchronously with the cold cathode electron gun, the muzzle of the cold cathode electron gun extending into the low-vacuum sealed drag hood, and an electron beam output port being provided at the bottom of the low-vacuum sealed drag hood and located at the axis of the cold cathode electron gun; a control box suspended side by side with the cold cathode electron gun on the crossbeam, the control box having at least a drag hood vacuum suction mechanism provided therein, connected to the low-vacuum sealed drag hood. This solution places a low-vacuum sealed drag hood on the cold cathode electron gun and moves it as a whole. The lower end of the low-vacuum sealed drag hood moves relatively on the welding workpiece. However, during use, since the weld of the welding workpiece may need to pass through the low-vacuum sealed drag hood and the temperature of the weld after welding is extremely high, the structural change and the high-temperature environment can easily damage the low-vacuum sealed drag hood, thereby affecting the sealing of the welding space around the electron beam welding gun, and thus affecting the welding quality. Summary of the Invention

[0005] In view of this, the present invention aims to provide a driving system for a local vacuum electron beam welding device to solve the technical problems of inconvenient operation and poor sealing of the local vacuum electron beam welding device in the prior art.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A local vacuum electron beam welding device driving system, comprising:

[0008] a base, wherein a processing area for electron beam welding a workpiece is formed above the base;

[0009] A sliding device includes a first sliding plate and a first driving device, wherein the first driving device is fixed relative to the base and can drive the first sliding plate to move on the base, and a workpiece to be welded is fixed on the first sliding plate, and the upper surface of the workpiece to be welded is flush with the upper surface of the first sliding plate;

[0010] The local sealing device includes a sealing plate, a first through hole is provided at the center of the sealing plate, the electron beam of the electron beam welding gun can pass through the first through hole to weld the workpiece to be welded, and the sealing plate is fixed relative to the electron beam welding gun;

[0011] A pressure device, the pressure device includes a second sliding plate and a second driving device, the second sliding plate cover is connected to the top of the local sealing device, guide columns are set at the opposite ends of the second sliding plate, and a third sliding plate is set at the lower end of the guide column, the third sliding plate is connected to the guide column as a whole, and the third sliding plate can move up and down under the action of the second driving device, and the second sliding plate changes the pressure at the connection between the local sealing device and the first sliding plate or the workpiece to be welded when the second sliding plate moves as a whole with the third sliding plate, and the second driving device is fixed on the base.

[0012] Furthermore, a connecting sleeve is sleeved on the guide column, and the connecting sleeve is fixed on the base.

[0013] Furthermore, the second driving device includes a fixed frame, which is connected to the base as a whole, and a second driving motor and a second ball screw are arranged on the fixed frame. The second ball screw is connected to the third sliding plate through a second nut sleeve, and the upper and lower ends of the second ball screw are respectively connected to the fixed frame through a third bearing seat and a fourth bearing seat, and the second driving motor and the second ball screw are driven by meshing transmission gears.

[0014] Furthermore, the fixed frame is set in a rectangular frame, the second drive motor is fixed to the upper surface of the lower base plate of the fixed frame, the output shaft of the second drive motor passes through the lower base plate of the fixed frame, and the driving gear is fixed on the output shaft below the fixed frame. Correspondingly, a driven gear is set at the end of the second ball screw passing through the lower base plate of the fixed frame, and the driving gear is meshed with the driven gear for transmission. A third bearing seat is set at the connection between the second ball screw and the lower base plate of the fixed frame, and a fourth bearing seat is set on the lower surface of the upper top plate of the fixed frame. The second ball screw is rotatably connected to the third bearing seat and the fourth bearing seat through a ball bearing, and a lifting connecting plate is set above the upper top plate of the fixed frame, and the lifting connecting plate is used to fix the fixed frame to the base.

[0015] Furthermore, the first drive device includes a first drive motor, which can drive the ball screw to rotate, and the ball screw is connected to the first mounting seat and the second mounting seat bearings, and the first mounting seat, the second mounting seat and the support panel of the base are connected as a whole, and the ball screw is screw-transmitted with the first nut sleeve, and the first nut sleeve is connected as a whole with the first sliding plate through the second connecting plate, wherein the rotation center axis direction of the ball screw is perpendicular to the rotation center axis direction of the second ball screw.

[0016] Furthermore, the sliding device further includes a sliding track and a sliding block. The sliding block is connected to the first sliding plate through a first connecting plate. The sliding block can be guided and slid on the sliding track.

[0017] Furthermore, two sets of the sliding rails and sliding blocks are provided correspondingly, and the two sliding rails are arranged on opposite sides of the ball screw.

[0018] Furthermore, a reduction mechanism and a coupling are arranged between the first drive motor and the ball screw, the output shaft of the first drive motor is connected through the reduction mechanism, the output end of the reduction mechanism is connected to the end of the ball screw through the coupling, and the center line of the output shaft of the first drive motor, the center line of the input shaft and the output shaft of the reduction mechanism, the center line of the center axis of the coupling, and the center line of the ball screw are arranged collinearly.

[0019] Furthermore, a mounting fixture is provided on the first sliding plate, and the bottom structure of the mounting fixture can pass through the first sliding plate and extend out of the lower surface of the first sliding plate. The outer edge of the mounting fixture overlaps the first mounting groove on the first sliding plate and the upper edge of the mounting fixture is flush with the upper surface of the first sliding plate. The workpiece to be welded is provided inside the mounting fixture and is fixed, and the upper surface of the workpiece to be welded is flush with the upper surface of the first sliding plate.

[0020] Furthermore, the base includes a support frame and a support panel, the support panel is fixed above the support frame, a connecting hole is provided on the support panel, and the connecting hole is provided corresponding to the connecting sleeve; a second mounting groove is provided on the support panel, and the second mounting groove is used to install and connect the first drive motor and / or deceleration mechanism.

[0021] Compared with the prior art, the local vacuum electron beam welding device drive system of the present invention has the following advantages:

[0022] (1) The driving system of the vacuum electron beam welding device described in the present invention, by providing a first driving device for driving the movement of the workpiece to be welded and a second driving device for changing the pressure at the connection between the local sealing device and the first sliding plate or the workpiece to be welded, can reduce the constraints of the vacuum chamber volume on the size of the electron beam welding parts and ensure the applicability of the vacuum electron beam welding device, while enhancing the sealing performance of the workpiece to be welded when it slides through the local sealing device after welding, greatly reducing the cost of the vacuum electron beam welding device and improving its reliability in use.

[0023] (2) The driving system of the vacuum electron beam welding device described in the present invention has an ingenious structure, is convenient for installing and replacing the workpiece to be welded, and is easy to operate. At the same time, it can be applied to the welding of various large-sized parts, further improving the reliability of the promotion and application of vacuum electron beam welding technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 This is a schematic side view of the structure of the vacuum electron beam welding device according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic top view of the structure of the vacuum electron beam welding device according to an embodiment of the present invention;

[0027] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of AA;

[0028] Figure 4 This is a schematic diagram of the explosion structure of the vacuum electron beam welding device according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic structural diagram of the drive system of the vacuum electron beam welding device according to an embodiment of the present invention;

[0030] Figure 6 for Figure 5 A schematic diagram of the front view of the structure shown in ;

[0031] Figure 7 for Figure 5 A schematic side view of the structure shown in FIG;

[0032] Figure 8 for Figure 5 Schematic diagram of the exploded structure of the structure shown in;

[0033] Figure 9 for Figure 8 Schematic diagram of the right side under the explosion structure diagram;

[0034] Figure 10 Schematic diagram of the cross-sectional structure of the sealing ring according to an embodiment of the present invention;

[0035] Description of reference numerals:

[0036] 1-electron beam welding gun; 2-transition duct device; 3-local sealing device; 3101-first through hole; 31-sealing plate; 32-sealing sleeve; 321-sealing ring; 322-deformation cavity; 3201-first sealing ring; 3202-second sealing ring; 4-sliding device; 41-first sliding plate; 4101-mounting fixture; 42-first driving device; 4201-first driving motor; 4202-reduction mechanism; 4203-first mounting seat; 4204-ball screw; 4205-second mounting seat; 4206-first nut sleeve; 4207-second connecting plate; 4208-coupling; 4209-first mounting groove; 43-sliding track; 44-sliding block; 4 5-first connecting plate; 5-pressure device; 51-second sliding plate; 5101-third through hole; 52-guide column; 53-connecting sleeve; 54-third sliding plate; 55-second driving device; 5501-fixed frame; 5502-second driving motor; 5503-driving gear; 5504-driven gear; 5505-second ball screw; 5506-third bearing seat; 5507-second nut sleeve; 5508-fourth bearing seat; 5509-lifting connecting plate; 6-base; 61-support frame; 62-support panel; 6201-track limiting groove; 6202-connecting hole; 6203-second mounting groove; 7-workpiece to be welded; 71-first workpiece; 72-second workpiece. DETAILED DESCRIPTION

[0037] In order to make the technical means, objectives and effects of the present invention easier to understand, embodiments of the present invention are described in detail below with reference to specific figures.

[0038] It should be noted that all terms used in the present invention to indicate direction and position, such as "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "low", "lateral", "longitudinal", "center", etc., are only used to explain the relative position relationship and connection status between the components in a certain specific state (as shown in the accompanying drawings). They are only for the convenience of describing the present invention, and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0039] In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical connections; direct connections or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0040] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0041] like Figures 1 to 9 As shown, the present invention discloses a vacuum electron beam welding device drive system, comprising:

[0042] a base 6, wherein a processing area for electron beam welding a workpiece is formed above the base 6;

[0043] The sliding device 4 includes a first sliding plate 41 and a first driving device 42. The first driving device 42 is fixed relative to the base 6. The first driving device 42 can drive the first sliding plate 41 to move on the base 6. The workpiece 7 to be welded is fixed on the first sliding plate 41. The upper surface of the workpiece 7 to be welded is flush with the upper surface of the first sliding plate 41.

[0044] The local sealing device 3 includes a sealing plate 31, a first through hole 3101 is provided at the center of the sealing plate 31, and the electron beam of the electron beam welding gun 1 can pass through the first through hole 3101 to weld the workpiece 7 to be welded. The sealing plate 31 is fixed relative to the electron beam welding gun 1;

[0045] The pressure device 5 includes a second sliding plate 51, and the second sliding plate 51 is covered on the top of the local sealing device 3. Guide columns 52 are set at the opposite ends of the second sliding plate 51, and a third sliding plate 54 is set at the lower end of the guide column 52. The third sliding plate 54 is connected to the guide column 52 as a whole. The third sliding plate 54 can move up and down under the action of the second driving device 55. When the second sliding plate 51 moves as a whole with the third sliding plate 54, the pressure at the connection between the local sealing device 3 and the first sliding plate 41 or the workpiece 7 to be welded is changed. The second driving device 55 is fixed on the base 6.

[0046] Since the low vacuum degree of the welding space around the electron beam welding gun of the vacuum electron beam welding device is the top priority for achieving its vacuum welding, when local vacuum electron beam welding is used for large-size pipes for ship systems, in order to avoid the cost increase caused by the excessive setting of the device, the applicant improved the drive system of the local vacuum electron beam welding device for linear butt metal parts, and set the electron beam welding gun 1 and the local sealing device 3 to a structure fixed relative to the base 6, and realized the planar movement of the workpiece 7 to be welded by setting a sliding device 4. During the welding process, according to the performance of the local sealing device 3, the second driving device 55 in the pressure device 5 is adjusted, and the pressure value applied to the sealing plate 31 by the second sliding plate 51 is changed, so that the local sealing device 3 and the first sliding plate 41 or the workpiece 7 to be welded are always kept in a relatively close fit during the welding process, and the workpiece 7 to be welded can be moved horizontally as a whole with the first sliding plate 41 under the action of the first driving device 42, which not only avoids the cost increase caused by the excessive size of the device, but also ensures the sealing performance of the weld of the workpiece 7 to be welded after welding through the local sealing device 3, thereby improving the welding efficiency and reliability of the electron beam welding gun 1.

[0047] The drive system of the vacuum electron beam welding device described in the present invention has an ingenious structure. By providing a first drive device 42 for driving the movement of the workpiece 7 to be welded and a second drive device 55 for changing the pressure at the connection between the local sealing device 3 and the first sliding plate 41 or the workpiece 7 to be welded, it not only reduces the constraints of the vacuum chamber volume on the size of the electron beam welding parts and ensures the applicability of the vacuum electron beam welding device, but also enhances the sealing performance of the workpiece 7 to be welded when it slides through the local sealing device 3 after welding, greatly reducing the cost of the vacuum electron beam welding device and improving its reliability in use.

[0048] As a preferred example of the invention, a connecting sleeve 53 is sleeved on the guide column 52, and the connecting sleeve 53 is fixed to the base 6. As an example of the present invention, four guide columns 52 are provided, respectively arranged at the four azimuth angles of the second sliding plate 51. The upper and lower ends of the guide columns 52 are respectively connected to the second sliding plate 51 and the third sliding plate 54. Each guide column 52 passes through the support panel 62 of the base 6. Preferably, a connecting sleeve 53 is provided on each guide column 52, and a connecting hole 6202 is provided on the support panel 62. Part of the connecting sleeve 53 passes through the connecting hole 6202 and is fixedly connected to the support panel 62. The second drive device 55 and the third sliding plate 54 are provided inside the support frame 61 below the support panel 62.

[0049] When in use, the second driving device 55 drives the third sliding plate 54 to move up and down, and then drives the guide column 52 to move up and down as a whole. After the guide column 52 passes through the connecting sleeve 53, it drives the second sliding plate 51 to move up and down, thereby changing the pressure borne by the local sealing device 3 during welding.

[0050] The pressure device 5 described in the present invention has an ingenious structure. The second drive device 55 and most of the transmission device are arranged inside the base 6, which has a more beautiful appearance and avoids the risk of noise or foreign matter damage caused by exposure of the power device of the pressure device 5. At the same time, the overall quality of the base 6 is increased, and the reliability of the pressure device 5 in changing the pressure at the connection between the local sealing device 3 and the first sliding plate 41 or the workpiece to be welded 7 is improved, further improving the sealing of the internal space of the local sealing device 3 when the linear butt metal parts local vacuum electron beam welding system described in the present invention is welded by electron beam flow.

[0051] As a preferred example of the present invention, the second driving device 55 includes a fixed frame 5501, which is connected to the base 6 as a whole. A second driving motor 5502 and a second ball screw 5505 are arranged on the fixed frame 5501. The second ball screw 5505 is connected to the third sliding plate 54 through a second nut sleeve 5507. The upper and lower ends of the second ball screw 5505 are respectively connected to the fixed frame 5501 through a third bearing seat 5506 and a fourth bearing seat 5508. The second driving motor 5502 and the second ball screw 5505 are transmitted through meshing transmission gears.

[0052] As an example of the present invention, the fixed frame 5501 is set in a rectangular frame, the second drive motor 5502 is fixed on the upper surface of the lower base plate of the fixed frame 5501, the output shaft of the second drive motor 5502 passes through the lower base plate of the fixed frame 5501, and the drive gear 5503 is fixed on the output shaft below the fixed frame 5501. Correspondingly, a driven gear 5504 is set at the end of the second ball screw 5505 passing through the lower base plate of the fixed frame 5501, and the drive gear 5503 is connected to the driven gear 5504 is meshed for transmission, a third bearing seat 5506 is provided at the connection between the second ball screw 5505 and the lower bottom plate of the fixed frame 5501, a fourth bearing seat 5508 is provided on the lower surface of the upper plate of the fixed frame 5501, and the second ball screw 5505 is rotatably connected to the third bearing seat 5506 and the fourth bearing seat 5508 via ball bearings. A lifting connecting plate 5509 is provided above the upper plate of the fixed frame 5501, and is used to fixedly connect the fixed frame 5501 to the base 6. Preferably, two lifting connecting plates 5509 are provided.

[0053] When in use, the second drive motor 5502 drives the drive gear 5503 to rotate, and drives the second ball screw 5505 to rotate in the opposite direction through the external meshing action of the drive gear 5503 and the driven gear 5504. Since the second ball screw 5505 is connected to the fixed frame 5501 through the third bearing seat 5506 and the fourth bearing seat 5508 bearings, the second ball screw 5505 can only rotate. The second nut sleeve 5507 arranged on the second ball screw 5505 drives the third sliding plate 54 to move up and down as a whole.

[0054] This setting discloses a structure of a second driving device 55, which uses a ball screw to drive the third sliding plate 54 to move up and down as a whole. The structure is reasonable, and continuous adjustment of the pressure applied by the pressure device 5 on the local sealing device 3 is achieved, further improving the smoothness and reliability of the operation of the pressure device 5.

[0055] As a preferred example of the present invention, the first driving device 42 includes a first driving motor 4201, which can drive the ball screw 4204 to rotate, and the ball screw 4204 is connected to the first mounting seat 4203 and the second mounting seat 4205 bearings, and the first mounting seat 4203, the second mounting seat 4205 and the support panel 62 of the base 6 are connected as a whole, and the ball screw 4204 is screw-transmitted with the first nut sleeve 4206, and the first nut sleeve 4206 is connected as a whole with the first sliding plate 41 through the second connecting plate 4207, wherein the direction of the rotation center axis of the ball screw 4204 is perpendicular to the direction of the rotation center axis of the second ball screw 5505.

[0056] This setting discloses a structure in which a first driving device 42 drives the first sliding plate 41 to perform horizontal driving movement, optimizes the driving and transmission structure of the sliding device 4, rationally utilizes the space inside and above the base 6, and ensures the movement of the workpiece 7 to be welded and the reliability of local vacuum electron beam welding.

[0057] As a preferred example of the present invention, the sliding device 4 further includes a sliding rail 43 and a sliding block 44 . The sliding block 44 is connected to the first sliding plate 41 through a first connecting plate 45 . The sliding block 44 can slide on the sliding rail 43 .

[0058] Preferably, two sets of the sliding rails 43 and the sliding blocks 44 are provided correspondingly, and the two sliding rails 43 are arranged on opposite sides of the ball screw 4204 .

[0059] This arrangement further improves the smoothness and reliability of the horizontal movement of the first sliding plate 41 under the action of the first driving device 42 through the guiding sliding action of the sliding block 44 and the sliding track 43 .

[0060] As a preferred example of the present invention, a reduction mechanism 4202 and a coupling 4208 are arranged between the first drive motor 4201 and the ball screw 4204. The output shaft of the first drive motor 4201 is connected through the reduction mechanism 4202, and the output end of the reduction mechanism 4202 is connected to the end of the ball screw 4204 through the coupling 4208. The center line of the output shaft of the first drive motor 4201, the center line of the input shaft and the output shaft of the reduction mechanism 4202, the center line of the center axis of the coupling 4208, and the center line of the ball screw 4204 are arranged collinearly. When in use, the output shaft of the first drive motor 4201 is connected to the end of the ball screw 4204 through the reduction mechanism 4202 and the coupling 4208. The deceleration effect of the reduction mechanism 4202 improves the transmission torque of the ball screw 4204, so that the first sliding plate 41 can still move horizontally reliably and smoothly when the local sealing device 3 is subjected to higher pressure. The output end of the reduction mechanism is connected to the ball screw 4204 through the coupling 4208, ensuring the concentricity of the output shaft of the first drive motor 4201, the output shaft of the reduction mechanism 4202 and the ball screw 4204 during transmission, thereby further improving the reliability of the operation of the first drive device 42.

[0061] As a preferred example of the present invention, a mounting fixture 4101 is provided on the first sliding plate 41, and the bottom structure of the mounting fixture 4101 can pass through the first sliding plate 41 and extend out of the lower surface of the first sliding plate 41, the outer edge of the mounting fixture 4101 overlaps the first mounting groove 4209 on the first sliding plate 41 and the upper edge of the mounting fixture 4101 is flush with the upper surface of the first sliding plate 41, the workpiece 7 to be welded is provided inside the mounting fixture 4101 and is fixed, and the upper surface of the workpiece 7 to be welded is flush with the upper surface of the first sliding plate 41.

[0062] Preferably, the mounting fixture 4101 includes a downwardly recessed accommodating space, and the first workpiece 71 and the second workpiece 72 of the workpiece 7 to be welded are spliced in the mounting fixture 4101 to form a welding seam, which is facing the electron beam flow output by the electron beam welding gun 1. When the workpiece 7 to be welded moves as a whole along with the first sliding plate 41 under the action of the first driving device 42, the plane of the workpiece 7 to be welded, the mounting fixture 4101 and the upper surface of the first sliding plate 41 are relatively flush, further ensuring the sealing of the welding position of the local sealing device 3 wrapped with the belt.

[0063] This setting discloses a structure for installing the workpiece 7 to be welded, which has a simple structure, is easy to install and replace, and is convenient to operate. At the same time, it can be applied to the welding of various large-sized parts, further improving the reliability of the promotion and application of vacuum electron beam welding technology.

[0064] As a preferred example of the present invention, the base 6 includes a support frame 61 and a support panel 62. The support panel 62 is fixed above the support frame 61. A connection hole 6202 is provided on the support panel 62. The connection hole 6202 is provided corresponding to the connection sleeve 53. A second mounting groove 6203 is provided on the support panel 62. The second mounting groove 6203 is used to install and connect the first drive motor 4201 and / or the reduction mechanism 4202. Preferably, a box cover is provided inside or outside the support frame 61, and a counterweight is provided inside the support frame 61 to increase the overall mass of the base 6. Preferably, a track limiting groove 6201 is provided on the upper surface of the support panel 62. The track limiting groove 6201 is used to place the sliding track 43.

[0065] By setting the second mounting groove 6203 on the support panel 62, the relative installation height of the first drive device 42 can be adjusted, thereby making space for installing different mounting fixtures 4101 on the first sliding plate 41, further improving the linear butt joint metal parts local vacuum electron beam welding system described in the present invention to be suitable for welding a variety of large-sized parts.

[0066] The driving system of the vacuum electron beam welding device described in the present invention, through the ball screw 4204 and the second ball screw 5505 arranged perpendicular to each other, can, on the one hand, continuously adjust the pressure applied to the local sealing device 3 by the pressure device 5 according to the structure and performance of the local sealing device 3, thereby ensuring the sealing of the connection between the local sealing device 3 and the first sliding plate 41 or the workpiece to be welded 7. Even when the high-temperature weld passes through, the welding space inside the local sealing device 3 is still reliably sealed, ensuring the low vacuum environment requirement of the electron beam welding gun 1 during welding. On the other hand, the workpiece to be welded 7 can be reliably moved horizontally relative to the local sealing device 3 under the action of the driving device. The structure is ingenious, which not only reasonably utilizes the space inside the base 6 and the upper plate of the platform, but also ensures the reliability of the operation of the sliding device 4 and the pressure device 5 and the smoothness of the movement adjustment.

[0067] The driving system of the vacuum electron beam welding device described in the present invention uses a sealing sleeve 32 that can be quickly tested for high-temperature resistance, mobile plastic sealing, and sealing performance under different surfacing heights through a high-temperature sealing material testing system for local vacuum electron beam welding independently developed by the applicant, so that the tested seals can be applied to different working conditions. Based on the test, the sealing material suitable for local vacuum electron beam welding is determined to be applied to the sealing sleeve 32 in the local vacuum electron beam welding system for linear butt metal parts.

[0068] As a preferred example of the present invention, the sealing sleeve 32 includes a first sealing ring 3201 and a second sealing ring 3202. The first sealing ring 3201 and the second sealing ring 3202 are arranged on the side of the sealing plate 31 away from the electron beam welding gun 1. A transition pipe device 2 is arranged between the electron beam welding gun 1 and the local sealing device 3. The transition pipe device 2 passes through the third through hole 5101 on the second sliding plate 51 and is connected to the sealing plate 31.

[0069] The applicant further discovered during research that nitrile rubber (NBR), a copolymer of butadiene and acrylonitrile, is the most commonly used raw material for sealing rubbers due to its excellent oil resistance, wear resistance, heat resistance, and adhesion. However, nitrile rubber seals prepared using different modifications and processing techniques generally exhibit different properties. In view of the fact that seals used in vacuum electron beam welding require high wear resistance, high temperature resistance, high elasticity, and high strength, the components of the sealing sleeve 32 of the present invention include:

[0070] 100 parts of a nitrile rubber copolymer; in the present invention, the nitrile rubber copolymer is manufactured by copolymerization of α, β-ethylenically unsaturated monocarboxylic acid alkyl ester monomers or α, β-ethylenically unsaturated monocarboxylic acid alkoxyalkyl ester monomers; the Mooney viscosity (ML1+4, 100°C) of the nitrile rubber copolymer is preferably 35 to 65.

[0071] The method for producing the acrylonitrile-butadiene rubber copolymer rubber used in the present invention is not particularly limited, and can be produced by copolymerizing the above-mentioned monomers and, if necessary, hydrogenating the carbon-carbon double bonds in the resulting copolymer. The polymerization method is not particularly limited, and can be carried out by a known emulsion polymerization method or solution polymerization method. During the polymerization, in addition to using an emulsifier, a polymerization initiator, and a molecular weight regulator, commonly used polymerization auxiliary materials can also be used.

[0072] 35-55 parts of liquid nitrile rubber modified carbon black; the liquid nitrile rubber modified carbon black is obtained by reacting amino-terminated liquid nitrile rubber with carbon black treated with an epoxy silane coupling agent;

[0073] 3 to 5 parts of a composite vulcanizing agent; the composite vulcanizing agent preferably includes sulfur, dicumyl peroxide and N, N'-m-phenylene bismaleimide (HVA-2);

[0074] 1 to 3 parts of a copolymeric antioxidant; wherein the copolymeric antioxidant includes N-(4-anilinophenyl) acrylamide, N-(4-anilinophenyl) methacrylamide, N-(4-anilinophenyl) cinnamic acid amide, N-(4-anilinophenyl) crotonamide, N-phenyl-4-(3-vinylbenzyloxy) aniline, N-phenyl-4-(4-vinylbenzyloxy) aniline, etc.;

[0075] 1 to 3 parts of an accelerator; wherein the accelerator preferably includes one or more of triallyl cyanurate, triallyl isocyanurate and m-phenylene bismaleimide.

[0076] When preparing the sealing sleeve 32, the nitrile rubber copolymer, the nitrile rubber modified carbon black, the amine crosslinking agent, the copolymerization anti-aging agent and the accelerator are mixed or extruded. Preferably, the sealing sleeve 32 is extruded through a special mold to obtain the sealing sleeve 32, such as Figure 10 As shown, the test piece prepared by this solution can be continuously formed, with low cost and high efficiency, while improving the product yield rate. The sealing sleeve 32 includes a sealing ring 321, and a hollow deformation cavity 322 is provided in the cross-sectional direction of the sealing ring 321. Preferably, the deformation cavity 322 is any one or more of the structures such as a circle, a rhombus or a regular polygon. By providing the hollow deformation cavity 322 inside the sealing ring 321, the overall elastic deformation performance of the sealing sleeve 32 is further improved.

[0077] 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 in the scope of protection of the present invention.

Claims

1. A local vacuum electron beam welding device drive system, characterized in that: include: A base (6), above which a processing area for electron beam welding a workpiece is formed; A sliding device (4) includes a first sliding plate (41) and a first driving device (42), wherein the first driving device (42) is fixed relative to the base (6), and the first driving device (42) can drive the first sliding plate (41) to move on the base (6), and a workpiece (7) to be welded is fixed on the first sliding plate (41), and the upper surface of the workpiece (7) to be welded is flush with the upper surface of the first sliding plate (41); A local sealing device (3) comprises a sealing plate (31), wherein a first through hole (3101) is provided at the center of the sealing plate (31), and an electron beam flow of an electron beam welding gun (1) can pass through the first through hole (3101) to weld a workpiece (7) to be welded, and the sealing plate (31) is fixed relative to the electron beam welding gun (1); A pressure device (5), the pressure device (5) includes a second sliding plate (51) and a second driving device (55), the second sliding plate (51) is covered on the top of the local sealing device (3), guide columns (52) are provided at the opposite ends of the second sliding plate (51), and a third sliding plate (54) is provided at the lower end of the guide column (52), the third sliding plate (54) is connected to the guide column (52) as a whole, and the third sliding plate (54) can move up and down under the action of the second driving device (55), and the second sliding plate (51) changes the pressure at the connection between the local sealing device (3) and the first sliding plate (41) or the workpiece to be welded (7) when the second sliding plate (51) moves as a whole with the third sliding plate (54), and the second driving device (55) is fixed on the base (6); The second driving device (55) includes a fixed frame (5501), the fixed frame (5501) is connected to the base (6) as a whole, and a second driving motor (5502) and a second ball screw (5505) are arranged on the fixed frame (5501), the second ball screw (5505) is connected to the third sliding plate (54) through a second nut sleeve (5507), the upper and lower ends of the second ball screw (5505) are connected to the fixed frame (5501) through a third bearing seat (5506) and a fourth bearing seat (5508), respectively, and the second driving motor (5502) and the second ball screw (5505) are driven by meshing transmission gears.

2. The local vacuum electron beam welding device driving system according to claim 1, characterized in that: A connecting sleeve (53) is sleeved on the guide column (52), and the connecting sleeve (53) is fixed on the base (6).

3. The local vacuum electron beam welding device driving system according to claim 1, characterized in that: The fixed frame (5501) is arranged in a rectangular frame, the second drive motor (5502) is fixed to the upper surface of the lower base plate of the fixed frame (5501), the output shaft of the second drive motor (5502) passes through the lower base plate of the fixed frame (5501), and the driving gear (5503) is fixed on the output shaft below the fixed frame (5501). Correspondingly, a driven gear (5504) is arranged at the end of the second ball screw (5505) passing through the lower base plate of the fixed frame (5501), and the driving gear (5503) is meshed with the driven gear (5504). Transmission, a third bearing seat (5506) is provided at the connection between the second ball screw (5505) and the lower bottom plate of the fixed frame (5501), a fourth bearing seat (5508) is provided on the lower surface of the upper top plate of the fixed frame (5501), the second ball screw (5505) is rotatably connected to the third bearing seat (5506) and the fourth bearing seat (5508) through ball bearings, a lifting connecting plate (5509) is provided above the upper top plate of the fixed frame (5501), and the lifting connecting plate (5509) is used to fixedly connect the fixed frame (5501) and the base (6).

4. The local vacuum electron beam welding device driving system according to any one of claims 1 to 3, characterized in that: The first driving device (42) includes a first driving motor (4201), which can drive the ball screw (4204) to rotate, and the ball screw (4204) is connected to the first mounting seat (4203) and the second mounting seat (4205) by bearings. The first mounting seat (4203), the second mounting seat (4205) and the support panel (62) of the base (6) are connected as a whole. The ball screw (4204) and the first nut sleeve (4206) are screw-driven, and the first nut sleeve (4206) is connected as a whole to the first sliding plate (41) through the second connecting plate (4207), wherein the direction of the rotation center axis of the ball screw (4204) is perpendicular to the direction of the rotation center axis of the second ball screw (5505).

5. The local vacuum electron beam welding device driving system according to claim 4, characterized in that: The sliding device (4) further comprises a sliding track (43) and a sliding block (44). The sliding block (44) is connected to the first sliding plate (41) via a first connecting plate (45). The sliding block (44) can be guided and slid on the sliding track (43).

6. The driving system of the local vacuum electron beam welding device according to claim 5, characterized in that: Two sets of the sliding rails (43) and the sliding blocks (44) are provided correspondingly, and the two sliding rails (43) are arranged on opposite sides of the ball screw (4204).

7. The driving system of the local vacuum electron beam welding device according to claim 4, characterized in that: A reduction mechanism (4202) and a coupling (4208) are provided between the first drive motor (4201) and the ball screw (4204); the output shaft of the first drive motor (4201) is connected via the reduction mechanism (4202); the output end of the reduction mechanism (4202) is connected to the end of the ball screw (4204) via the coupling (4208); the center line of the output shaft of the first drive motor (4201), the center lines of the input shaft and output shaft of the reduction mechanism (4202), the center line of the center axis of the coupling (4208), and the center line of the ball screw (4204) are collinearly arranged.

8. The driving system of the local vacuum electron beam welding device according to claim 7, characterized in that: A mounting fixture (4101) is provided on the first sliding plate (41), the bottom structure of the mounting fixture (4101) being capable of passing through the first sliding plate (41) and extending out of the lower surface of the first sliding plate (41), the outer edge of the mounting fixture (4101) being overlapped in the first mounting groove (4209) on the first sliding plate (41) and the upper edge of the mounting fixture (4101) being flush with the upper surface of the first sliding plate (41), the workpiece (7) to be welded being provided inside the mounting fixture (4101) and being fixed, and the upper surface of the workpiece (7) to be welded being flush with the upper surface of the first sliding plate (41).

9. The driving system of the local vacuum electron beam welding device according to claim 8, characterized in that: The base (6) comprises a support frame (61) and a support panel (62), wherein the support panel (62) is fixed above the support frame (61), and a connection hole (6202) is provided on the support panel (62), wherein the connection hole (6202) is arranged corresponding to the connection sleeve (53); and a second mounting groove (6203) is provided on the support panel (62), wherein the second mounting groove (6203) is used for mounting and connecting the first drive motor (4201) and / or the reduction mechanism (4202).

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