A local vacuum electron beam welding system for linear butt-jointed metal parts

Abstract

The present invention provides a local vacuum electron beam welding system for linearly butted metal parts, comprising: a base, a sliding device, an electron beam welding gun, a local sealing device, a pressure device, and a transition duct device. The pressure device and sliding device provided on the base change the pressure at the connection between the local sealing device and the first sliding plate or the workpiece to be welded. The transition duct device provided between the electron beam welding gun and the local sealing device can, under the action of a vacuum unit, draw smoke and air generated during welding from the internal space of the local sealing device. The local vacuum electron beam welding system for linearly butted metal parts described in the present invention ensures that when the electron beam welding gun is welding the workpiece to be welded, the welding space is always in a space with a relatively low vacuum degree, reducing the constraints of the vacuum chamber volume on the size of the electron beam welded parts. The system has an ingenious structure and reliable operation, greatly improving the reliability of the application of vacuum electron beam welding technology.

Description

Technical Field

[0001] The invention relates to the technical field of electron beam welding, in particular to a local vacuum electron beam welding system for linear butted metal parts. 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. For large-sized pipes used in ship systems, the weld seam must move relative to the vacuum electron beam weld seam. The electron gun used in the local low-vacuum electron beam welding technology of TWI in the UK is a high-voltage electron gun that uses radio frequency excitation to generate electrons. Electron beam welding is performed in a small, enclosed drag hood with a vacuum degree of 1 mbar. However, the structure of this mobile drag hood is extremely complex. The usual working mode is that the large workpiece moves closely around the drag hood. However, the design and manufacture of the local low-vacuum mobile enclosed drag hood with this structure is relatively difficult, and it has high constraints on the size of the electron beam welded parts. Otherwise, it is very easy to cause the vacuum degree in the mobile drag hood to be insufficient to meet the requirements of electron beam welding, which is not conducive to the promotion of the application of local vacuum electron beam welding technology. Summary of the Invention

[0005] In view of this, the present invention aims to provide a local vacuum electron beam welding system for linearly butting metal parts, so as to solve the technical problem in the prior art that the local vacuum electron beam welding system is severely restricted by the size of the welded parts.

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

[0007] A local vacuum electron beam welding system for linear butt-jointed metal parts, 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] an electron beam welding gun, the electron beam welding gun being fixedly arranged relative to the base and being used for welding a workpiece to be welded;

[0011] 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;

[0012] a pressure device, the pressure device being fixed to the base and being used to change the pressure at the connection between the local sealing device and the first sliding plate or the workpiece to be welded;

[0013] A transition duct device is provided between the electron beam welding gun and the local sealing device. The transition duct device is connected to a vacuum unit. The transition duct device can, under the action of the vacuum unit, suck the fume and air generated during welding in the internal space of the local sealing device.

[0014] Furthermore, the transition duct device includes a transition duct, and an anti-evaporation tube is arranged at the center of the upper end of the transition duct. The anti-evaporation tube is used to direct the electron beam emitted by the electron beam welding gun to the welding position of the workpiece to be welded. A first chamber is formed between the inner wall of the transition duct and the outer wall of the anti-evaporation tube. The first chamber is connected to the internal space of the local sealing device. A suction duct is arranged on the outside of the transition duct, one end of the suction pipe is connected to the first chamber, and the other end is connected to the vacuum unit.

[0015] Furthermore, a first through hole and a second through hole are provided on the sealing plate of the local sealing device, a sealing sleeve is provided at an end of the sealing plate away from the electron beam welding gun, the first through hole is sealed and assembled with the transition pipe, the second through hole is provided between the sealing sleeve and the first through hole, and a connecting groove is provided on the side of the sealing plate away from the electron beam welding gun, the two ends of the connecting groove are respectively connected to the first through hole and the second through hole, and the second through hole is connected to the transition pipe.

[0016] Furthermore, the suction pipe is connected to the outer wall of the transition pipe through a transition connector.

[0017] Furthermore, the suction pipeline includes a first suction pipeline and a second suction pipeline, the first suction pipeline is communicated with the channel where one of the second through holes is located, and the second suction pipeline is communicated with the channel where the other second through hole is located.

[0018] Furthermore, a first accommodating groove and a second accommodating groove are provided on the side of the sealing plate away from the electron beam welding gun, the first accommodating groove and the second accommodating groove are both provided in a closed ring shape, and the center of the first accommodating groove and the center of the second accommodating groove coincide with the center of the sealing plate, a second sealing ring is provided in the first accommodating groove, and the second sealing ring is interference fit with the first accommodating groove, and a first sealing ring is provided in the second accommodating groove, and the first sealing ring is interference fit with the second accommodating groove.

[0019] Furthermore, the pressure device includes a second sliding plate, which is covered on top of the local sealing device, and guide columns are arranged at opposite ends of the second sliding plate. A connecting sleeve is sleeved on the guide column, and the connecting sleeve is fixed on the base. A third sliding plate is arranged at the lower end of the guide column, and the third sliding plate is connected to the guide column as a whole. The third sliding plate can move up and down under the action of the second driving device, and the second driving device is fixed on the base.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] Compared with the prior art, the linear butt metal parts local vacuum electron beam welding system of the present invention has the following advantages:

[0024] (1) The local vacuum electron beam welding system for straight-line butted metal parts described in the present invention has a sliding device that can move relative to the electron beam welding gun and the local sealing device, and a pressure device that can change the pressure at the connection between the local sealing device and the first sliding plate or the workpiece to be welded, so that when the electron beam welding gun welds the workpiece to be welded, the welding space is always in a space with a relatively low vacuum degree. This makes the local vacuum electron beam welding system for straight-line butted metal parts described in the present invention work reliably in welding large-sized workpieces to be welded, reduces the constraints of the vacuum chamber volume on the size of electron beam welded parts, has a clever structure, works reliably, and greatly improves the reliability of the application of vacuum electron beam welding technology.

[0025] (2) The local vacuum electron beam welding system for straight-line butt-jointed metal parts described in the present invention provides a transition duct device between the electron beam welding gun and the local sealing device. On the one hand, it is used to extract the fume generated inside the local sealing device during welding with the electron beam welding gun. On the other hand, it can also timely supplement and improve the vacuum state of the internal space of the local sealing device, thereby further improving the reliability of the local vacuum electron beam welding system for straight-line butt-jointed metal parts during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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:

[0027] Figure 1 This is a side structural schematic diagram of a local vacuum electron beam welding system for linearly butting metal parts according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic top view of the structure of the local vacuum electron beam welding system for linearly butting metal parts according to an embodiment of the present invention;

[0029] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of AA;

[0030] Figure 4 This is a schematic diagram of the explosion structure of the local vacuum electron beam welding system for linearly butting metal parts according to an embodiment of the present invention;

[0031] Figure 5 This is a structural diagram of the electron gun transition duct device, the sliding device, and the pressure device assembled together according to an embodiment of the present invention;

[0032] Figure 6 for Figure 5A schematic diagram of the front view of the structure shown in ;

[0033] Figure 7 for Figure 5 A schematic side view of the structure shown in FIG;

[0034] Figure 8 for Figure 5 Schematic diagram of the exploded structure of the structure shown in;

[0035] Figure 9 for Figure 8 Schematic diagram of the right side under the explosion structure diagram;

[0036] Figure 10 This is a schematic side view of the sealing plate according to an embodiment of the present invention;

[0037] Figure 11 This is a schematic side view of the sealing plate according to an embodiment of the present invention from a second viewing angle;

[0038] Figure 12 Schematic diagram of the cross-sectional structure of the sealing ring according to an embodiment of the present invention;

[0039] Description of reference numerals:

[0040] 1-Electron beam welding gun; 2-Transition pipe device; 21-Transition pipe; 2101-First chamber; 22-Suction pipe; 221-First branch pipe; 222-Second branch pipe; 2201-First suction pipe; 2202-Second suction pipe; 23-Transition connector; 24-Anti-evaporation pipe; 3-Local sealing device; 31-Sealing plate; 3101-First through hole; 3102-Second through hole; 3103-Connecting groove; 310 4-first receiving groove; 3105-second receiving groove; 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-speed 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 slot; 43 - sliding track; 44 - sliding block; 45 - 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 Machine; 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 slot; 7-workpiece to be welded; 71-first workpiece; 72-second workpiece. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] Example 1

[0046] like Figures 1 to 9 As shown, the present invention discloses a local vacuum electron beam welding system for linear butt-jointed metal parts, comprising:

[0047] a base 6, wherein a processing area for electron beam welding a workpiece is formed above the base 6;

[0048] 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.

[0049] An electron beam welding gun 1, the electron beam welding gun 1 is fixed relative to the base 6 and is used for welding a workpiece 7 to be welded;

[0050] 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;

[0051] A pressure device 5 is fixed on the base 6 and is used to change the pressure at the connection between the local sealing device 3 and the first sliding plate 41 or the workpiece 7 to be welded.

[0052] During the research process, the applicant found that for local vacuum electron beam welding of large-sized pipes for ship systems, the sealing performance of the welding space around the electron beam welding gun 1 is of paramount importance to achieve its vacuum welding. However, since the electron beam welding gun 1 forms a long weld on the workpiece 7 to be welded, the weld may need to pass through the local sealing device 3, and the temperature of the weld after welding is extremely high. This structural change and the high temperature environment can easily damage the local sealing device 3, thereby affecting the sealing of the welding space around the electron beam welding gun 1. The applicant improved the local vacuum electron beam welding system for linear butt-jointed metal parts, set the electron beam welding gun 1 and the local sealing device 3 as 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, the applied pressure value of the pressure device 5 is adjusted according to the performance of the local sealing device 3, so that the connection between the local sealing device 3 and the first sliding plate 41 or the workpiece 7 to be welded always maintains a relatively tight fit during the welding process, avoiding the sealing failure caused by the weld of the workpiece 7 to be welded passing through the local sealing device 3 after welding, thereby improving the welding efficiency and reliability of the electron beam welding gun 1.

[0053] The local vacuum electron beam welding system for linear butt-jointed metal parts described in the present invention has a sliding device 4 that can move relative to the electron beam welding gun 1 and the local sealing device 3, and a pressure device 5 that can change the pressure at the connection between the local sealing device 3 and the first sliding plate 41 or the workpiece to be welded 7, arranged on the base 6. When the electron beam welding gun 1 welds the workpiece to be welded 7, the welding space is always in a space with a lower vacuum degree. This makes the local vacuum electron beam welding system for linear butt-jointed metal parts described in the present invention reliable in welding large-sized workpieces to be welded 7, reduces the constraints of the vacuum chamber volume on the size of electron beam welded parts, has an ingenious structure, and works reliably, greatly improving the reliability of the application of vacuum electron beam welding technology.

[0054] As a preferred example of the present invention, the pressure device 5 includes a second sliding plate 51, which is covered on the top of the local sealing device 3, and guide columns 52 are arranged at the opposite ends of the second sliding plate 51. A connecting sleeve 53 is sleeved on the guide column 52, and the connecting sleeve 53 is fixed on the base 6. A third sliding plate 54 is arranged at the lower end of the guide column 52, and 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, and the second driving device 55 is fixed on the base 6. As an example of the present invention, four guide posts 52 are provided, arranged at four azimuth angles of the second sliding plate 51, respectively. The upper and lower ends of the guide posts 52 are connected to the second sliding plate 51 and the third sliding plate 54, respectively. Each guide post 52 passes through the support panel 62 of the base 6. Preferably, a connecting sleeve 53 is provided on each guide post 52, and a connecting hole 6202 is provided on the support panel 62. A partial structure of the connecting sleeve 53 passes through the connecting hole 6202 and is fixedly connected to the support panel 62. The second driving device 55 and the third sliding plate 54 are provided inside the support frame 61 below the support panel 62. During use, the second driving device 55 drives the third sliding plate 54 to move up and down, thereby driving the guide posts 52 to move up and down as a whole. After passing through the connecting sleeve 53, the guide posts 52 drive the second sliding plate 51 to move up and down, thereby changing the pressure borne by the local sealing device 3 during welding.

[0055] 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.

[0056] 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. As an example of the present invention, the fixed frame 5501 is set 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 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 engaged with the driven gear 5504 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, and 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. The lifting connecting plate 5509 is used to fix the fixed frame 5501 to the base 6. Preferably, two lifting connecting plates 5509 are provided. 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] As a preferred embodiment of the present invention, the sliding device 4 further includes a sliding rail 43 and a sliding block 44. The sliding block 44 is integrally connected to the first sliding plate 41 via a first connecting plate 45. The sliding block 44 can slide guided on the sliding rail 43. Preferably, two sets of sliding rails 43 and sliding blocks 44 are provided, and the two sliding rails 43 are arranged on opposite sides of the ball screw 4204.

[0061] 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 .

[0062] As a preferred example of the present invention, a reduction mechanism 4202 and a coupling 4208 are provided between the first drive motor 4201 and the ball screw 4204. During use, the output shaft of the first drive motor 4201 is connected to the end of the ball screw 4204 via the reduction mechanism 4202 and the coupling 4208. The deceleration effect of the reduction mechanism 4202 increases 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 high pressure. The output end of the reduction mechanism is connected to the ball screw 4204 via 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, further improving the reliability of the operation of the first drive device 42.

[0063] 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. 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] The above embodiments are mainly used to disclose a drive system and a transmission system for a local vacuum electron beam welding system for linearly butted metal parts. Through the ball screw 4204 and the second ball screw 5505 arranged perpendicular to each other, on the one hand, the pressure applied to the local sealing device 3 by the pressure device 5 can be continuously adjusted according to the structure and performance of the local sealing device 3 to ensure 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 to ensure the low vacuum environment requirements 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 drive 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.

[0068] Example 2

[0069] like Figures 1 to 11 As shown, the present invention discloses a local vacuum electron beam welding system for linear butt-jointed metal parts, comprising:

[0070] a base 6, wherein a processing area for electron beam welding a workpiece is formed above the base 6;

[0071] 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.

[0072] An electron beam welding gun 1, the electron beam welding gun 1 is fixed relative to the base 6 and is used for welding a workpiece 7 to be welded;

[0073] 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;

[0074] a pressure device 5 , the pressure device 5 being fixed to the base 6 and being used to change the pressure at the connection between the local sealing device 3 and the first sliding plate 41 or the workpiece 7 to be welded;

[0075] A transition duct device 2 is provided between the electron beam welding gun 1 and the local sealing device 3. The transition duct device 2 is connected to a vacuum unit. The transition duct device 2 can draw the fume and air generated during welding in the internal space of the local sealing device 3 under the action of the vacuum unit.

[0076] Compared with Example 1, the present application sets a transition pipe device 2 between the electron beam welding gun 1 and the local sealing device 3, the upper end of the transition pipe device 2 is cooperatively connected to the electron beam welding gun 1, and the lower end of the transition pipe device 2 is fixedly connected to the local sealing device 3. When the electron beam welding gun 1 welds the workpiece 7 on the sliding device 4, smoke will be formed in the internal space of the local sealing device 3, affecting the normal welding operation of the electron beam flow of the electron beam welding gun 1. At the same time, the sliding device 4 may cause the low vacuum degree inside the local sealing device 3 to change when moving. Therefore, the applicant sets a transition pipe device 2 connected to the vacuum unit between the electron beam welding gun 1 and the local sealing device 3. On the one hand, it is used to extract the smoke generated inside the local sealing device 3 when the electron beam welding gun 1 is welding. On the other hand, it can also timely supplement and improve the vacuum state of the internal space of the local sealing device 3, further improving the reliability of the local vacuum electron beam welding system for linear butt metal parts during welding.

[0077] As an example of the present invention, the transition duct device 2 includes a transition duct 21. An anti-evaporation tube 24 is provided at the center of the upper end of the transition duct 21. The anti-evaporation tube 24 is used to direct the electron beam emitted by the electron beam welding gun 1 toward the welding position of the workpiece 7 to be welded. A first chamber 2101 is formed between the inner wall of the transition duct 21 and the outer wall of the anti-evaporation tube 24. The first chamber 2101 is connected to the internal space of the local sealing device 3. A suction duct 22 is provided on the outer side of the transition duct 21. One end of the suction duct 22 is connected to the first chamber 2101, and the other end is connected to the vacuum unit. Preferably, a third through hole 5101 is provided on the second sliding plate 51. After passing through the third through hole 5101, the transition duct 21 is fixedly connected to the upper surface of the sealing plate 31.

[0078] This arrangement discloses a structure of a transition pipe device 2 , which is rational in structure and further improves the reliability of the electron beam welding of the workpiece 7 by the electron beam welding gun 1 , while also being able to timely extract the fume generated during welding.

[0079] As a preferred example of the present invention, the suction pipe 22 is connected to the outer wall of the transition pipe 21 through a transition connector 23. This arrangement further ensures the sealing of the connection between the suction pipe 22 and the transition pipe 21.

[0080] As a preferred example of the present invention, a first through hole 3101 and a second through hole 3102 are provided on the sealing plate 31 of the local sealing device 3, a sealing sleeve 32 is provided on the end of the sealing plate 31 away from the electron beam welding gun 1, the first through hole 3101 is sealed and assembled with the transition pipe 21, the second through hole 3102 is provided between the sealing sleeve 32 and the first through hole 3101, and a connecting groove 3103 is provided on the side of the sealing plate 31 away from the electron beam welding gun 1, the two ends of the connecting groove 3103 are respectively connected to the first through hole 3101 and the second through hole 3102, and the second through hole 3102 is connected to the transition pipe 21.

[0081] This arrangement improves the structure of the local sealing device 3, on the one hand ensuring the reliability of forming a sealed space inside the local sealing device 3 for local vacuum electron beam welding, and on the other hand further improving the reliability of the transition duct device 2 in sucking the smoke generated when the electron beam welding gun 1 is working, thereby ensuring the welding quality.

[0082] As a preferred embodiment of the present invention, two second through holes 3102 are symmetrically arranged on the sealing plate 31 along the central axis of the first through hole 3101. Correspondingly, two connecting grooves 3103 are provided, and the two connecting grooves 3103 are respectively used to connect the two second through holes 3102 with the first through hole 3101.

[0083] As a preferred example of the present invention, the suction pipe 22 includes a first suction pipe 2201 and a second suction pipe 2202, wherein the first suction pipe 2201 is connected to the channel where one of the second through-holes 3102 is located, and the second suction pipe 2202 is connected to the channel where the other second through-hole 3102 is located. As an example of the present invention, the first suction pipe 2201 includes a first branch pipe 221 and a second branch pipe 222, wherein the first branch pipe 221 is arranged horizontally, and the second branch pipe 222 is arranged vertically, one end of the first branch pipe 221 is connected to the transition pipe 21 through one of the transition connectors 23, and the other end of the first branch pipe 221 is bent through a bend or directly to one side of the vacuum unit, forming a transition arc at the bending portion, one end of the second branch pipe 222 is connected to the channel where the second through-hole 3102 is located, and the other end of the second branch pipe 222 is connected to the first branch pipe 221. The structure of the second suction pipeline 2202 is similar to that of the first suction pipeline 2201 and will not be repeated here.

[0084] As an example of the present invention, four transition connectors 23 are provided on the transition duct 21, and the angle between the four transition connectors 23 is 90 degrees. Each transition connector 23 is connected to the vacuum unit through a connecting pipeline (partially not shown in the figure).

[0085] As a preferred example of the present invention, a first accommodating groove 3104 and a second accommodating groove 3105 are arranged on the side of the sealing plate 31 away from the electron beam welding gun 1, and the first accommodating groove 3104 and the second accommodating groove 3105 are both arranged in a closed ring shape, and the center of the first accommodating groove 3104 and the center of the second accommodating groove 3105 coincide with the center of the sealing plate 31, a second sealing ring 3202 is arranged in the first accommodating groove 3104, and the second sealing ring 3202 is interference fit with the first accommodating groove 3104, and a first sealing ring 3201 is arranged in the second accommodating groove 3105, and the first sealing ring 3201 is interference fit with the second accommodating groove 3105.

[0086] The sealing sleeve 32 used in the local vacuum electron beam welding system for linear butt metal parts described in the present invention can be quickly tested for high temperature resistance, mobile plastic sealing and sealing performance under different surfacing heights through the 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.

[0087] 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:

[0088] 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.

[0089] 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.

[0090] 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;

[0091] 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);

[0092] 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.;

[0093] 1 to 3 parts of an accelerator; wherein the accelerator preferably includes one or more of triallyl cyanurate, triallyl isocyanurate and m-phenylene bismaleimide.

[0094] 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. As an example, the sealing sleeve 32 is extruded through a special mold to obtain the sealing sleeve 32. Figure 12 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.

[0095] 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 system for linear butt-jointed metal parts, 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 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), and the workpiece (7) to be welded being provided inside the mounting fixture (4101) and being fixed; The mounting fixture (4101) includes a downwardly recessed accommodation space, and the first workpiece (71) and the second workpiece (72) of the workpiece to be welded (7) are spliced together in the mounting fixture (4101) to form a welding seam, and the welding seam is directly opposite to the electron beam flow output by the electron beam welding gun (1), and when the workpiece to be welded (7) moves as a whole along the first sliding plate (41) under the action of the first driving device (42), the plane of the workpiece to be welded (7), the mounting fixture (4101) and the upper surface of the first sliding plate (41) are relatively flush; An electron beam welding gun (1), the electron beam welding gun (1) being fixedly arranged relative to the base (6) and used for welding a workpiece (7) to be welded; A local sealing device (3) comprises a sealing plate (31), a first through hole (3101) being provided at the center of the sealing plate (31), the electron beam of the electron beam welding gun (1) being able to pass through the first through hole (3101) to weld the workpiece (7) to be welded, and the sealing plate (31) being fixed relative to the electron beam welding gun (1); a pressure device (5), the pressure device (5) being fixed on the base (6) and being used to change the pressure at the connection between the local sealing device (3) and the first sliding plate (41) or the workpiece to be welded (7); A transition duct device (2), the transition duct device (2) being arranged between the electron beam welding gun (1) and the local sealing device (3), the transition duct device (2) being connected to a vacuum unit, and the transition duct device (2) being able to suck smoke and air generated during welding in the internal space of the local sealing device (3) under the action of the vacuum unit; The pressure device (5) includes a second sliding plate (51), the second sliding plate (51) is covered on the top of the local sealing device (3), guide columns (52) are provided at opposite ends of the second sliding plate (51), a connecting sleeve (53) is sleeved on the guide column (52), the connecting sleeve (53) is fixed on the base (6), 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 a second driving device (55), 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 linear butt metal parts local vacuum electron beam welding system according to claim 1, characterized in that: The transition duct device (2) comprises a transition duct (21), an anti-evaporation tube (24) is provided at the center of the upper end of the transition duct (21), the anti-evaporation tube (24) is used for the electron beam flow emitted by the electron beam welding gun (1) to be directed to the welding position of the workpiece (7) to be welded, a first chamber (2101) is formed between the inner wall of the transition duct (21) and the outer wall of the anti-evaporation tube (24), the first chamber (2101) is communicated with the internal space of the local sealing device (3), a suction duct (22) is provided on the outside of the transition duct (21), one end of the suction duct (22) is communicated with the first chamber (2101), and the other end is connected to the vacuum unit.

3. The linear butt metal parts local vacuum electron beam welding system according to claim 2, characterized in that: A first through hole (3101) and a second through hole (3102) are provided on the sealing plate (31) of the local sealing device (3); a sealing sleeve (32) is provided on the end of the sealing plate (31) away from the electron beam welding gun (1); the first through hole (3101) is sealed and assembled with the transition pipe (21); the second through hole (3102) is provided between the sealing sleeve (32) and the first through hole (3101); a connecting groove (3103) is provided on the side of the sealing plate (31) away from the electron beam welding gun (1); two ends of the connecting groove (3103) are respectively connected with the first through hole (3101) and the second through hole (3102); and the second through hole (3102) is connected with the transition pipe (21).

4. The linear butt metal parts local vacuum electron beam welding system according to claim 3, characterized in that: The suction pipe (22) is connected to the outer wall of the transition pipe (21) via a transition connector (23).

5. The local vacuum electron beam welding system for linear butt metal parts according to claim 4, characterized in that: The suction pipe (22) comprises a first suction pipeline (2201) and a second suction pipeline (2202), wherein the first suction pipeline (2201) is connected to a channel where one of the second through holes (3102) is located, and the second suction pipeline (2202) is connected to a channel where another second through hole (3102) is located.

6. The linear butt metal parts local vacuum electron beam welding system according to claim 3, 4 or 5, characterized in that: A first accommodating groove (3104) and a second accommodating groove (3105) are provided on a side of the sealing plate (31) away from the electron beam welding gun (1); the first accommodating groove (3104) and the second accommodating groove (3105) are both provided in a closed annular shape, and the center of the first accommodating groove (3104) and the center of the second accommodating groove (3105) coincide with the center of the sealing plate (31); a second sealing ring (3202) is provided in the first accommodating groove (3104), and the second sealing ring (3202) is interference-fitted with the first accommodating groove (3104); a first sealing ring (3201) is provided in the second accommodating groove (3105), and the first sealing ring (3201) is interference-fitted with the second accommodating groove (3105).

7. The local vacuum electron beam welding system for linear butt metal parts according to claim 1, 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).

8. The local vacuum electron beam welding system for linear butt metal parts according to claim 1, 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).

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