Electron beam additive manufacturing equipment

Abstract

The invention relates to the technical field of additive manufacturing, in particular to electron beam additive manufacturing equipment. The electron beam additive manufacturing equipment comprises a vacuum forming chamber, an electron beam emitting device, a supporting device and a communicating device, the vacuum forming chamber comprises a top plate, an inlet is formed in the top plate, the electron beam emitting device is located above the vacuum forming chamber, and the electron beam emitting device is used for emitting electron beams into the vacuum forming chamber; an electron beam emitting device is fixedly installed on the supporting device, the first end of the communicating device is fixed and communicated with an emitting opening of the electron beam emitting device, the second end of the communicating device is fixedly connected with the top plate and communicated with the inlet, and the second end of the communicating device can move in a self-adaptive mode relative to the first end of the communicating device. According to the electron beam additive manufacturing equipment provided by the invention, even if the top plate of the vacuum forming chamber deforms at a high temperature, the relative position of the electron beam emitting device does not deflect, so that the printing precision and the printing quality of the electron beam additive manufacturing equipment are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing, and in particular to an electron beam additive manufacturing device. Background Art

[0002] The electron beam additive manufacturing equipment includes a vacuum forming chamber and an electron beam emitting device. The electron beam emitted by the electron beam emitting device is used as a heat source to sinter or melt the powder on the powder bed in the vacuum forming chamber layer by layer, so that the powder is stacked layer by layer.

[0003] In the prior art, the electron beam emitting device is directly fixed to the top plate of the vacuum forming chamber by bolts. When the top plate of the vacuum forming chamber is thermally deformed at high temperature, the relative position of the electron beam emitting device will be tilted, causing the position of the electron beam emitted by the electron beam emitting device on the powder bed in the vacuum forming chamber to change, ultimately affecting the printing accuracy and printing quality of the molded parts. In the related art, a reinforcing rib plate is usually set between the electron beam emitting device and the top plate or the strength of the top plate is increased to prevent the top plate from being deformed at high temperature and to avoid the relative position of the electron beam emitting device from being skewed, but the above method still cannot effectively prevent the deformation of the top plate.

[0004] Therefore, there is an urgent need for an electron beam additive manufacturing device to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide an electron beam additive manufacturing device to avoid the relative position deviation of the electron beam emitting device and ensure the printing accuracy and printing quality of the electron beam additive manufacturing device.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] An electron beam additive manufacturing device, comprising:

[0008] A vacuum forming chamber, the vacuum forming chamber comprising a top plate, the top plate being provided with an inlet;

[0009] an electron beam emitting device, located above the vacuum forming chamber, and configured to emit an electron beam into the vacuum forming chamber;

[0010] a supporting device, on which the electron beam emitting device is fixedly mounted; and

[0011] A connecting device, wherein the first end of the connecting device is fixed to and connected with the emission port of the electron beam emission device, the second end of the connecting device is fixedly connected to the top plate and connected with the inlet, and the second end of the connecting device can be adaptively movable relative to the first end of the connecting device.

[0012] As an optional solution, the communication device includes:

[0013] A first connecting portion, fixed to and connected to the emission port of the electron beam emission device;

[0014] A second connection portion, fixedly connected to the top plate and communicated with the inlet; and

[0015] A corrugated hose, wherein the first end of the corrugated hose is connected to the first connecting portion, and the second end of the corrugated hose is connected to the second connecting portion.

[0016] As an optional solution, the first connecting portion is a connecting flange;

[0017] Alternatively, the first connection portion includes a first flange connection portion and a first pipe main portion connected to each other, the first flange connection portion is fixed to and communicated with the emission port of the electron beam emission device, the first pipe main portion is connected to the first end of the corrugated hose, and a first cooling channel is opened on the pipe wall of the first pipe main portion.

[0018] As an optional solution, the second connecting portion is a connecting flange;

[0019] Alternatively, the second connection portion includes a second flange connection portion and a second pipe main portion connected to each other, the second flange connection portion is fixedly connected to the top plate and communicated with the inlet, the second pipe main portion is connected to the second end of the corrugated hose, and a second cooling channel is opened on the pipe wall of the second pipe main portion.

[0020] As an optional solution, the communication device includes:

[0021] a first connecting pipe, the first connecting pipe being fixed to and connected with the emission port of the electron beam emission device; and

[0022] The second connecting pipe is ball-jointed with the first connecting pipe and communicated with the first connecting pipe. The second connecting pipe is fixedly connected with the top plate and communicated with the inlet.

[0023] As an optional solution, a through hole is provided on the first connecting pipe, and the connecting device further comprises:

[0024] a connecting piece, wherein the outer diameter of the connecting piece is smaller than the inner diameter of the through hole, the connecting piece is movable relative to the through hole, and the connecting piece passes through the through hole and is threadedly connected to the second connecting pipe piece; and

[0025] An elastic member is sleeved on the connecting member, and the elastic member is clamped between the first connecting pipe member and the end of the connecting member.

[0026] As an optional solution, the communication device further includes:

[0027] A sealing ring is sandwiched between the first connecting pipe member and the second connecting pipe member, and the sealing ring is surrounded by the outer periphery of the channel of the first connecting pipe member and the channel of the second connecting pipe member.

[0028] As an optional solution, a third cooling channel is provided on the tube wall of at least one of the first connecting tube member and the second connecting tube member.

[0029] As an optional solution, the supporting device includes:

[0030] Support frame;

[0031] An adjustment plate is disposed on the support frame, and the installation positions of the adjustment plate and the support frame are adjustable; and

[0032] A connecting pressing block, one end of which is fixedly connected to the adjusting plate, and the other end of which is fixedly pressed to the electron beam emitting device.

[0033] As an optional solution, the electron beam additive manufacturing equipment includes a plurality of electron beam emitting devices arranged at intervals, and the plurality of electron beam emitting devices are installed on the supporting device. Each of the electron beam emitting devices is correspondingly provided with the connecting device, and the emission port of each electron beam emitting device is connected to the vacuum forming chamber through the corresponding connecting device.

[0034] Beneficial effects of the present invention:

[0035] The present invention provides an electron beam additive manufacturing device, which includes a vacuum forming chamber, an electron beam emitting device, a supporting device and a connecting device, wherein the vacuum forming chamber includes a top plate, an inlet is opened on the top plate, the electron beam emitting device is located above the vacuum forming chamber, the electron beam emitting device is used to emit electron beams into the vacuum forming chamber, the electron beam emitting device is fixedly installed on the supporting device, the first end of the connecting device is fixed and connected to the emission port of the electron beam emitting device, the second end of the connecting device is fixedly connected to the top plate and connected to the inlet, and the second end of the connecting device can be adaptively movable relative to the first end of the connecting device. The electron beam additive manufacturing device provided by the present invention, by installing the electron beam emitting device on the supporting device, and enabling the second end of the connecting device to be adaptively movable relative to the first end of the connecting device, even if the top plate of the vacuum forming chamber is deformed at high temperature and the second end of the connecting device is deflected, the relative position of the first end of the connecting device will not change, thereby avoiding the relative position of the electron beam emitting device from being deflected due to the high temperature deformation of the top plate, ensuring the stability of the relative position of the electron beam emitting device, and further ensuring the printing accuracy and printing quality of the electron beam additive manufacturing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of an electron beam additive manufacturing device provided in Embodiment 1 of the present invention;

[0037] Figure 2 is a schematic diagram of the structure of a communication device provided in Embodiment 1 of the present invention;

[0038] Figure 3 is a schematic diagram of the structure of a connecting device provided in Embodiment 2 of the present invention;

[0039] Figure 4 is a schematic diagram of the structure of a connecting device provided in Embodiment 3 of the present invention;

[0040] Figure 5 It is a schematic diagram of the structure of the electron beam additive manufacturing equipment provided in Example 4 of the present invention.

[0041] In the figure:

[0042] 100. Electron beam additive manufacturing equipment; 200. Molded parts;

[0043] 1. Vacuum forming chamber; 11. Top plate; 111. Inlet; 12. Heat shield;

[0044] 2. Electron beam emitting device; 21. Electron gun; 22. Deflection coil;

[0045] 3. Support device; 31. Support frame; 32. Adjustment plate; 33. Connection pressing block;

[0046] 4. Connecting device; 41. First connecting part; 411. First flange connecting part; 412. First pipe main body; 4121. First cooling channel; 42. Second connecting part; 43. Corrugated hose; 44. First connecting pipe; 441. Through hole; 45. Second connecting pipe; 451. Third cooling channel; 46. Connecting part; 461. Screw part; 462. Abutting block part; 47. Elastic part; 48. Sealing ring;

[0047] 5. Molding table device; 51. Working platform; 52. Molding cylinder; 521. Powder bed; 53. Lifting assembly;

[0048] 6. Powder supply device; 61. Material box; 62. Material spreading assembly. DETAILED DESCRIPTION

[0049] In order to make the technical problem solved by the present invention, the technical solution adopted and the technical effect achieved more clearly, the technical solution of the present invention is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0050] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0052] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0053] Embodiment 1

[0054] like Figure 1 As shown, this embodiment provides an electron beam additive manufacturing device 100, which uses an electron beam selective melting process to print a molded part 200. Specifically, the electron beam additive manufacturing device 100 mainly includes a vacuum molding chamber 1, a molding table device 5, a powder supply device 6, and an electron beam emitting device 2, wherein the molding table device 5 and the powder supply device 6 are both located in the vacuum molding chamber 1, the powder supply device 6 is used to lay the powder in the molding area of ​​the molding table device 5, and the electron beam emitting device 2 is used to emit an electron beam, and deflect and distribute the emitted electron beam to the corresponding position of the molding area, so as to print and form the molded part 200 on the molding area.

[0055] In this embodiment, if Figure 1 As shown, the powder supply device 6 includes a material box 61 and a material spreading component 62, wherein the material box 61 is arranged above the forming table device 5, the material box 61 is used to hold the powder, and the material box 61 can also supply the held powder to the upper surface of the forming table device 5, and the material spreading component 62 can reciprocate relative to the upper surface of the forming table device 5 to spread the powder on the upper surface of the forming table device 5 in the forming area of ​​the forming table device 5. Specifically, the material spreading component 62 can be a push plate, and the driving member that pushes the push plate to reciprocate can be a linear cylinder or a linear motor. This embodiment does not limit the specific device that pushes the push plate to reciprocate. Optionally, in this embodiment, a plurality of material boxes 61 are arranged at intervals, which improves the efficiency of feeding the upper surface of the forming table device 5.

[0056] In this embodiment, if Figure 1 As shown, the forming table device 5 includes a working platform 51 and a forming cylinder 52, wherein the forming cylinder 52 is arranged below the working platform 51, a powder bed 521 is arranged inside the forming cylinder 52, a forming area is formed in the powder bed 521, a material box 61 supplies the powder to the upper surface of the working platform 51, and the material spreading component 62 reciprocates relative to the upper surface of the working platform 51 to spread the powder on the upper surface of the working platform 51 in the forming area of ​​the powder bed 521.

[0057] In addition, if Figure 1As shown, the molding table device 5 also includes a lifting component 53, which is arranged in the molding cylinder 52, and the lifting component 53 is used to drive the powder bed 521 in the molding cylinder 52 to rise and fall relative to the working platform 51. Specifically, the lifting component 53 can be a linear cylinder, which has the advantages of reliable operation and easy installation. Specifically, after a previous layer of powder in the powder bed 521 is formed, the lifting component 53 drives the powder bed 521 to descend a height of the thickness of the powder layer relative to the molding cylinder 52, so that the upper surface of the powder bed 521 and the surface of the working platform 51 form a height difference of the thickness of the powder layer, and then the material box 61 outputs a certain amount of powder and falls on the surface of the working platform 51, and then the material laying component 62 pushes the powder to the powder bed 521 to form a new layer of powder. Repeatedly, new deposition layers are accumulated on the powder bed 521 layer by layer until the final shape of the molded part 200 is obtained.

[0058] In the prior art, the electron beam emitting device 2 is directly fixed to the top plate of the vacuum forming chamber 1 by bolts. When the top plate of the vacuum forming chamber 1 is thermally deformed at high temperature, the relative position of the electron beam emitting device 2 will be tilted, resulting in a change in the position of the electron beam emitted by the electron beam emitting device 2 on the powder bed 521 in the vacuum forming chamber 1, which ultimately affects the printing accuracy and printing quality of the molded part 200. In the related art, a reinforcing rib plate is usually provided between the electron beam emitting device 2 and the top plate or the strength of the top plate is increased to prevent the top plate from being deformed at high temperature and to prevent the relative position of the electron beam emitting device 2 from being tilted, but the above method still cannot effectively prevent the deformation of the top plate.

[0059] In order to solve the above problems, Figure 1As shown, the electron beam additive manufacturing equipment 100 provided in this embodiment also includes a supporting device 3 and a connecting device 4, the vacuum forming chamber 1 includes a top plate 11, an inlet 111 is opened on the top plate 11, the electron beam emitting device 2 is located above the vacuum forming chamber 1, and the electron beam emitting device 2 is fixedly installed on the supporting device 3, the first end of the connecting device 4 is fixed to and connected with the emission port of the electron beam emitting device 2, the second end of the connecting device 4 is fixedly connected to the top plate 11 and connected with the inlet 111, and the second end of the connecting device 4 can adaptively move relative to the first end of the connecting device 4. The electron beam additive manufacturing equipment 100 provided in this embodiment installs the electron beam emitting device 2 on the supporting device 3, and enables the second end of the connecting device 4 to be adaptively movable relative to the first end of the connecting device 4. Even if the top plate 11 of the vacuum forming chamber 1 is deformed at high temperature and pulls the second end of the connecting device 4 to be deflected, the relative position of the first end of the connecting device 4 will not change, thereby avoiding the relative position of the electron beam emitting device 2 from being deflected due to the high temperature deformation of the top plate 11, ensuring the stability of the relative position of the electron beam emitting device 2, and further ensuring the printing accuracy and printing quality of the electron beam additive manufacturing equipment 100.

[0060] It should be noted that “the second end of the connecting device 4 is capable of adaptively moving relative to the first end of the connecting device 4 ” means that the second end of the connecting device 4 is capable of moving relative to the first end of the connecting device 4 under the action of an external force.

[0061] In this embodiment, if Figure 1 As shown, a heat insulation cover 12 is provided inside the vacuum forming chamber 1, one end of the heat insulation cover 12 is connected to the inlet 111, and the other end of the heat insulation cover 12 extends to the working platform 51, and the other end of the heat insulation cover 12 is directly opposite to the powder bed 521. The electron beam entering the vacuum forming chamber 1 through the inlet 111 is irradiated to the forming area in the powder bed 521 through the heat insulation cover 12, which has a heat insulation effect on the heat of the electron beam and prevents the heat generated by the electron beam from being transferred to other devices in the vacuum forming chamber 1.

[0062] Optionally, in this embodiment, if Figure 1 and Figure 2As shown, the connecting device 4 includes a first connecting portion 41, a second connecting portion 42 and a corrugated hose 43, wherein the first connecting portion 41 is fixed to and connected with the emission port of the electron beam emitting device 2, the second connecting portion 42 is fixedly connected to the top plate 11 and connected with the inlet 111, the first end of the corrugated hose 43 is connected to the first connecting portion 41, and the second end of the corrugated hose 43 is connected to the second connecting portion 42. The structural design of the connecting device 4 is such that even if the top plate 11 is deformed at high temperature and causes the second connecting portion 42 to deflect, the second connecting portion 42 will pull the corrugated hose 43 to be adaptively deflected and adjusted, thereby not affecting the relative position of the first connecting portion 41 and the electron beam emitting device 2. In addition, by providing the corrugated hose 43, it is not only ensured that the second end of the connecting device 4 can be adaptively movable relative to the first end of the connecting device 4, but also the adjustment is flexible, the structure is simple, and the cost is low.

[0063] Optionally, in the present embodiment, the second connection part 42 is a connection flange. By designing the second connection part 42 in the form of a connection flange, it is not only convenient for the second connection part 42 to dock and connect with the inlet 111, but also makes the structure simple and convenient to install. Optionally, in the present embodiment, the first connection part 41 includes a first flange connection part 411 and a first pipe main body part 412 connected to each other, wherein the first flange connection part 411 is fixed and connected to the emission port of the electron beam emission device 2, the first pipe main body part 412 is connected to the first end of the corrugated hose 43, and a first cooling channel 4121 is provided on the pipe wall of the first pipe main body part 412. The structural design of the above-mentioned first connection part 41 is not only convenient for docking and connecting with the emission port of the electron beam emission device 2, but also can cool down the outer peripheral wall of the connecting device 4 through the first cooling channel 4121, so as to avoid the heat of the connecting device 4 from being transferred to the devices near the connecting device 4.

[0064] Optionally, in other embodiments, the second connection part 42 may include a second flange connection part and a second pipe main body part connected to each other, the second flange connection part is fixedly connected to the top plate 11 and communicated with the inlet 111, the second pipe main body part is connected to the second end of the corrugated hose 43, and a second cooling channel is provided on the pipe wall of the second pipe main body part. The above arrangement makes it easy for the second connection part 42 to dock with the inlet 111, and can also cool the outer peripheral wall of the connecting device 4 through the second cooling channel to prevent the heat of the connecting device 4 from being transferred to the devices near the connecting device 4. Optionally, in other embodiments, the first connection part 41 may also be directly designed in the form of a connecting flange.

[0065] In this embodiment, if Figure 1As shown, the electron beam emitting device 2 includes an electron gun 21 and a deflection coil 22 which are connected in sequence, and the deflection coil 22 is fixedly connected to the electron gun 21, the electron gun 21 is used to emit an electron beam, the emission port of the deflection coil 22 is docked with the first connecting part 41, and the deflection coil 22 is used to focus or deflect the received electron beam, thereby ensuring that the electron beam can be irradiated to the molding area in the powder bed 521 through the connecting device 4, the inlet 111 and the heat insulation cover 12 in sequence.

[0066] In this embodiment, if Figure 1 As shown, the support device 3 includes a support frame 31, an adjustment plate 32 and a connecting block 33, wherein the adjustment plate 32 is arranged on the support frame 31, and the installation position of the adjustment plate 32 and the support frame 31 is adjustable, one end of the connecting block 33 is fixedly connected to the adjustment plate 32, and the other end of the connecting block 33 is fixedly pressed on the electron beam emitting device 2. By making the installation position of the adjustment plate 32 relative to the support frame 31 adjustable, the relative position of the electron beam emitting device 2 and the support frame 31 is adjusted, thereby ensuring the accuracy and adaptability of the installation position of the electron beam emitting device 2. Specifically, in this embodiment, the other end of the connecting block 33 is fixedly pressed on the electron gun 21, so that the electron gun 21 is fixedly installed on the support device 3. Optionally, in this embodiment, a plurality of first mounting holes are provided at intervals on the adjustment plate 32, and a second mounting hole is provided on the support frame 31. By adjusting the position of the adjustment plate 32, one of the first mounting holes is made to face the second mounting hole, and a bolt is passed through the first mounting hole and is threadedly connected to the second mounting hole facing the adjustment plate 32, thereby achieving a fixed connection between the adjustment plate 32 and the support frame 31. In addition, by providing a plurality of first mounting holes, it is also convenient to adjust the fixed position of the adjustment plate 32 relative to the support frame 31.

[0067] Optionally, in this embodiment, the support frame 31 can be fixed to the reinforcing rib plate at the top of the vacuum forming chamber 1, or the support frame 31 can be made independent of the vacuum forming chamber 1 and directly fixed to the foundation, as long as the electron beam emission device 2 is located above the vacuum forming chamber 1.

[0068] Embodiment 2

[0069] The electron beam additive manufacturing device 100 provided in this embodiment is substantially the same as that in the first embodiment. The difference between the electron beam additive manufacturing device 100 provided in this embodiment and that in the first embodiment is that the specific structure of the connecting device 4 is different.

[0070] In this embodiment, if Figure 3 As shown, the first connection part 41 and the second connection part 42 are both connection flanges. The above arrangement makes the connection device 4 not only convenient for docking and connection with the corresponding interface, but also simple in structure and low in cost.

[0071] Embodiment 3

[0072] The electron beam additive manufacturing device 100 provided in this embodiment is substantially the same as that in the first embodiment. The difference between the electron beam additive manufacturing device 100 provided in this embodiment and that in the first embodiment is that the specific structure of the connecting device 4 is different.

[0073] In this embodiment, if Figure 4 As shown, the connecting device 4 includes a first connecting pipe 44 and a second connecting pipe 45, wherein the first connecting pipe 44 is fixed to and connected with the emission port of the deflection coil 22 in the electron beam emitting device 2, the second connecting pipe 45 is ball-hinged with the first connecting pipe 44 and is connected with the first connecting pipe 44, and the second connecting pipe 45 is fixedly connected to the top plate 11 and is connected with the inlet 111. The structural design of the connecting device 4 is such that even if the top plate 11 is deformed at high temperature and causes the second connecting pipe 45 to deflect, the second connecting pipe 45 will be adaptively rotated and adjusted relative to the first connecting pipe 44, thereby not affecting the relative position of the first connecting pipe 44 and the electron beam emitting device 2. In addition, the structural design of the connecting device 4 is flexible in adjustment and simple in structure. Optionally, in this embodiment, the end surfaces of the first connecting tube 44 and the second connecting tube 45 that are interconnected are both spherical, and the spherical surface of the first connecting tube 44 is rotatably arranged in the spherical groove of the second connecting tube 45, thereby ensuring that the second connecting tube 45 and the first connecting tube 44 are spherically hinged.

[0074] In this embodiment, if Figure 4 As shown, a through hole 441 is provided on the first connecting pipe 44, and the connecting device 4 further includes a connecting piece 46 and an elastic piece 47, wherein the outer diameter of the connecting piece 46 is smaller than the inner diameter of the through hole 441, the connecting piece 46 can move relative to the through hole 441, and the connecting piece 46 passes through the through hole 441 and is threadedly connected to the second connecting pipe 45, the elastic piece 47 is sleeved on the connecting piece 46, and the elastic piece 47 is clamped between the ends of the first connecting pipe 44 and the connecting piece 46. By providing the connecting piece 46 and the elastic piece 47, the movable ball hinge connection between the second connecting pipe 45 and the first connecting pipe 44 is realized, and the tightness of the abutment between the second connecting pipe 45 and the first connecting pipe 44 is also ensured.

[0075] Specifically, the elastic member 47 is a spring, and the connecting member 46 includes a connected screw portion 461 and an abutment block portion 462, the screw portion 461 passes through the through hole 441 and is threadedly connected to the second connecting pipe member 45, the spring is sleeved on the screw portion 461, and the spring is clamped between the first connecting pipe member 44 and the abutment block portion 462.

[0076] Optionally, in this embodiment, if Figure 4As shown, the connecting device 4 further includes a sealing ring 48, which is sandwiched between the first connecting pipe 44 and the second connecting pipe 45, and the sealing ring 48 is arranged around the outer periphery of the channel of the first connecting pipe 44 and the channel of the second connecting pipe 45. By providing the sealing ring 48, the sealing performance of the connection between the first connecting pipe 44 and the second connecting pipe 45 is further ensured.

[0077] Optionally, a third cooling channel 451 is provided on the tube wall of at least one of the first connecting pipe 44 and the second connecting pipe 45, so that the outer peripheral wall of the connecting device 4 is cooled by the third cooling channel 451 to prevent the heat of the connecting device 4 from being transferred to the components near the connecting device 4. Optionally, in this embodiment, the third cooling channel 451 is provided on the tube wall of the second connecting pipe 45. In other embodiments, the third cooling channel 451 may be provided only on the tube wall of the first connecting pipe 4, or on the tube walls of both the first connecting pipe 44 and the second connecting pipe 45.

[0078] Embodiment 4

[0079] The electron beam additive manufacturing device 100 provided in this embodiment is substantially the same as that in the first embodiment. The electron beam additive manufacturing device 100 provided in this embodiment is different from that in the first embodiment in that:

[0080] like Figure 5 As shown, in this embodiment, the electron beam additive manufacturing equipment 100 includes a plurality of electron beam emitting devices 2 arranged at intervals, and the plurality of electron beam emitting devices 2 are all installed on the supporting device 3, and each electron beam emitting device 2 is correspondingly provided with a connecting device 4, and the emission port of each electron beam emitting device 2 is connected to the vacuum forming chamber 1 through the corresponding connecting device 4. By providing a plurality of electron beam emitting devices 2, the irradiation range of the electron beam to the forming area is effectively guaranteed, and the processing requirements of large-sized formed parts 200 are met. Optionally, in this embodiment, the electron beam additive manufacturing equipment 100 includes two electron beam emitting devices 2 arranged at intervals, and in other embodiments, the specific number of the electron beam emitting devices 2 can be set according to requirements.

[0081] Optionally, in this embodiment, the electron gun 21 in each electron beam emitting device 2 is disposed on the support frame 31 via an adjustment plate 32 and a plurality of connection pressing blocks 33 on the adjustment plate 32 .

[0082] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An electron beam additive manufacturing device, It is characterized in that include: A vacuum forming chamber (1), the vacuum forming chamber (1) comprising a top plate (11), the top plate (11) being provided with an inlet (111); An electron beam emitting device (2) is located above the vacuum forming chamber (1), and the electron beam emitting device (2) is configured to emit an electron beam into the vacuum forming chamber (1); A supporting device (3), on which the electron beam emitting device (2) is fixedly mounted; as well as A connecting device (4), wherein a first end of the connecting device (4) is fixed to and connected with an emission port of the electron beam emitting device (2), a second end of the connecting device (4) is fixedly connected to the top plate (11) and connected with the inlet (111), and the second end of the connecting device (4) is capable of adaptive movement relative to the first end of the connecting device (4).

2. The electron beam additive manufacturing device according to claim 1, It is characterized in that The communication device (4) comprises: A first connecting portion (41) is fixed to and communicated with an emission port of the electron beam emission device (2); a second connection portion (42) fixedly connected to the top plate (11) and communicating with the inlet (111); and A corrugated hose (43), wherein a first end of the corrugated hose (43) is connected to the first connecting portion (41), and a second end of the corrugated hose (43) is connected to the second connecting portion (42).

3. The electron beam additive manufacturing device according to claim 2, It is characterized in that The first connecting portion (41) is a connecting flange; Alternatively, the first connection portion (41) comprises a first flange connection portion (411) and a first pipe main portion (412) connected to each other, the first flange connection portion (411) is fixed to and communicated with the emission port of the electron beam emission device (2), the first pipe main portion (412) is connected to the first end of the corrugated hose (43), and a first cooling channel (4121) is provided on the pipe wall of the first pipe main portion (412).

4. The electron beam additive manufacturing device according to claim 2, It is characterized in that The second connecting portion (42) is a connecting flange; Alternatively, the second connection portion (42) includes a second flange connection portion and a second pipe main body portion that are connected to each other, the second flange connection portion is fixedly connected to the top plate (11) and communicates with the inlet (111), the second pipe main body portion is connected to the second end of the corrugated hose (43), and a second cooling channel is provided on the pipe wall of the second pipe main body portion.

5. The electron beam additive manufacturing device according to claim 1, It is characterized in that The communication device (4) comprises: A first connecting pipe (44), the first connecting pipe (44) being fixed to and connected with the emission port of the electron beam emission device (2); and The second connecting pipe member (45) is ball-jointed with the first connecting pipe member (44) and is in communication with the first connecting pipe member (44); the second connecting pipe member (45) is fixedly connected to the top plate (11) and is in communication with the inlet (111).

6. The electron beam additive manufacturing device according to claim 5, It is characterized in that The first connecting pipe (44) is provided with a through hole (441), and the connecting device (4) further comprises: a connecting piece (46), wherein the outer diameter of the connecting piece (46) is smaller than the inner diameter of the penetration hole (441), the connecting piece (46) is movable relative to the penetration hole (441), and the connecting piece (46) passes through the penetration hole (441) and is threadedly connected to the second connecting pipe piece (45); and An elastic member (47), wherein the elastic member (47) is sleeved on the connecting member (46), and the elastic member (47) is sandwiched between the first connecting pipe member (44) and the end of the connecting member (46).

7. The electron beam additive manufacturing device according to claim 6, It is characterized in that The communication device (4) further comprises: A sealing ring (48) is sandwiched between the first connecting pipe (44) and the second connecting pipe (45), and the sealing ring (48) is surrounded by the outer periphery of the channel of the first connecting pipe (44) and the channel of the second connecting pipe (45).

8. The electron beam additive manufacturing device according to claim 5, It is characterized in that A third cooling channel (451) is provided on the tube wall of at least one of the first connecting tube (44) and the second connecting tube (45).

9. The electron beam additive manufacturing device according to any one of claims 1 to 8, It is characterized in that The supporting device (3) comprises: Support frame (31); an adjusting plate (32) disposed on the supporting frame (31), and the installation positions of the adjusting plate (32) and the supporting frame (31) are adjustable; and A connecting pressing block (33), one end of which is fixedly connected to the adjusting plate (32), and the other end of which is fixedly pressed to the electron beam emitting device (2).

10. The electron beam additive manufacturing device according to any one of claims 1 to 8, It is characterized in that The electron beam additive manufacturing equipment comprises a plurality of electron beam emitting devices (2) arranged at intervals, wherein the plurality of electron beam emitting devices (2) are mounted on the supporting device (3), each of the electron beam emitting devices (2) is provided with a corresponding connecting device (4), and the emission port of each electron beam emitting device (2) is connected to the vacuum forming chamber (1) via the corresponding connecting device (4).

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