CN212042660U

CN212042660U - Additive manufacturing device

Info

Publication number: CN212042660U
Application number: CN202020465961.0U
Authority: CN
Inventors: 郭超; 马旭龙; 阚文斌
Original assignee: Tianjin Qingyan Zhishu Technology Co ltd
Current assignee: Tianjin Qingyan Zhishu Technology Co ltd
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2020-12-01
Anticipated expiration: 2030-04-02

Abstract

The utility model belongs to the technical field of the vibration material disk makes, a vibration material disk makes device is disclosed, including the shaping room, be located shaping indoor shaping jar and electron beam generating device, and wrap up in the outdoor three-dimensional compensation coil of shaping, electron beam generating device emission electron beam in the shaping position department of shaping jar, three-dimensional compensation coil is configured to produce compensation magnetic field so that the magnetic field intensity of presetting the position in the shaping room is the default. The utility model discloses a set up three-dimensional compensation coil outside the shaping chamber, it can produce the compensation magnetic field when additive manufacturing device's environment magnetic field changes to offset environment magnetic field, make the magnetic field intensity of presetting the position in the shaping chamber resume to the default, and then can not influence the gathering and the deflection of electron beam, need not to recalibrate additive manufacturing device again, easy operation is swift.

Description

Additive manufacturing device

Technical Field

The utility model relates to a vibration material disk makes technical field, especially relates to a vibration material disk makes device.

Background

Additive manufacturing (3D printing) is a manufacturing technique for building three-dimensional objects by successively fusing more than one thin layer of material. Powder bed type additive manufacturing is one of additive manufacturing technical routes, and the basic process steps are as follows: a powder supply and paving system spreads the powder material into a thin layer on a work platform, and a high energy density ray (laser or electron beam) scans a cross section of the three-dimensional object on the powder layer; then, the working platform descends by the thickness of one powder layer, a new layer of powder is laid on the working platform, and the next section of the three-dimensional object is scanned by rays; and repeating the steps until the three-dimensional object is manufactured.

In the additive manufacturing system taking electron beams as an energy source, focusing and deflecting coils are arranged, and the current of the coils is controlled to generate a compensation magnetic field so that the electron beams are focused and scanned. When the additive manufacturing equipment is used, the existence of the environmental magnetic field can interfere the magnetic field generated by the coil in the system, and the focusing and deflection of the electron beam are adversely affected, so that the forming precision of the system is further affected. The existing common method is as follows: after the additive manufacturing equipment is installed at the selected position, the system is calibrated. If the environmental magnetic field changes (due to the movement of the device, the change of the surrounding environment of the device, etc.), recalibration is required to recover the accuracy of the system. The calibration of the system requires a skilled operator and is time consuming.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a vibration material disk device to solve current environment magnetic field and change and need calibrate the problem of consuming time overlength to the system again.

To achieve the purpose, the utility model adopts the following technical proposal:

an additive manufacturing apparatus comprises a forming chamber, a forming cylinder and an electron beam generating device which are positioned in the forming chamber, and a three-dimensional compensation coil which is wrapped outside the forming chamber, wherein the electron beam generating device emits an electron beam at a forming position of the forming cylinder, and the three-dimensional compensation coil is configured to generate a compensation magnetic field so that the magnetic field intensity of a preset position in the forming chamber is a preset value.

Preferably, the three-dimensional compensation coils include X-axis compensation coils disposed on both sides of the forming chamber in an X direction, Y-axis compensation coils disposed on both sides of the forming chamber in a Y direction, and Z-axis compensation coils disposed on both sides of the forming chamber in a Z direction.

Preferably, the X-axis compensation coil is provided in plurality, and the plurality of X-axis compensation coils are provided at equal intervals.

Preferably, the plurality of X-axis compensation coils are tapered in size and/or number of turns in a direction away from the forming chamber.

Preferably, the Y-axis compensation coils are provided in plurality, and the plurality of Y-axis compensation coils are provided at equal intervals.

Preferably, the plurality of Y-axis compensation coils are tapered in size and/or number of turns in a direction away from the forming chamber.

Preferably, the plurality of Z-axis compensation coils are provided, and the plurality of Z-axis compensation coils are provided at equal intervals.

Preferably, the plurality of Z-axis compensation coils are tapered in size and/or number of turns in a direction away from the forming chamber.

Preferably, the X-axis compensation coil, the Y-axis compensation coil, and the Z-axis compensation coil are all connected to a dc power supply.

The utility model has the advantages that: through set up three-dimensional compensation coil outside the shaping room, it can produce the compensation magnetic field when additive manufacturing device's environment magnetic field changes to offset environment magnetic field, make the magnetic field intensity of the indoor default position of shaping resume to the default, and then can not influence the gathering and the deflection of electron beam, need not to recalibrate additive manufacturing device again, easy operation is swift.

Drawings

Fig. 1 is a schematic structural diagram of an additive manufacturing apparatus provided by the present invention;

fig. 2 is a schematic layout diagram of the X-axis coil provided by the present invention.

In the figure:

1. a forming chamber; 2. a forming cylinder; 3. an electron beam generating device; 4. an X-axis compensation coil; 5. and a Z-axis compensation coil.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The utility model provides an additive manufacturing device, as shown in fig. 1, this additive manufacturing device includes shaping room 1, be located shaping jar 2 and electron beam generating device 3 of shaping room 1, and wrap up in the outer three-dimensional compensation coil of shaping room 1, wherein electron beam generating device 3 can emit electron beam to the shaping position department of shaping jar 2, in order to realize the scanning of the powder material of shaping position department, preheat, operation such as melting, in this embodiment, this electron beam generating device 3 can be including focusing scanning coil and deflection yoke. The three-dimensional compensation coil is arranged on the periphery of the forming chamber 1, and can generate a compensation magnetic field when the environmental magnetic field of the additive manufacturing device changes so as to offset the environmental magnetic field, so that the magnetic field intensity of a preset position in the forming chamber 1 is restored to a preset value, the influence on the aggregation and deflection of electron beams is avoided, the additive manufacturing device does not need to be recalibrated again, and the operation is simple and rapid. In this embodiment, the preset position may be a fixed position in the forming chamber 1, and may be selected and determined as needed.

In this embodiment, the three-dimensional compensation coil includes an X-axis compensation coil 4, a Y-axis compensation coil (not shown), and a Z-axis compensation coil 5, and the X-axis compensation coil 4, the Y-axis compensation coil, and the Z-axis compensation coil 5 can form an enclosure frame that can enclose the forming chamber 1 and the electron beam generating device 3.

The X-axis compensation coils 4 are provided in two sets, and the two sets of X-axis compensation coils 4 are symmetrically disposed on two sides of the forming chamber 1 (i.e., on the left and right sides of the forming chamber 1) along the X direction, and can generate a compensation magnetic field affecting the X direction after current is applied. The two groups of Y-axis compensation coils are symmetrically arranged on two sides of the forming chamber 1 (namely the front side and the rear side of the forming chamber 1) along the Y direction, and can generate a compensation magnetic field influencing the Y direction after current is introduced. The two groups of Z-axis compensation coils 5 are symmetrically arranged on two sides of the forming chamber 1 (i.e., the upper and lower sides of the forming chamber 1) along the Z-direction, and can generate a compensation magnetic field influencing the Z-direction after current is supplied. The forming chamber 1 can be wrapped by the X-axis compensation coil 4, the Y-axis compensation coil and the Z-axis compensation coil 5, and the three are communicated with a direct-current power supply to generate corresponding magnetic fields.

In the present embodiment, as shown in fig. 2, a plurality of X-axis compensation coils 4 are provided, and the plurality of X-axis compensation coils 4 are provided at equal intervals. So that the compensation magnetic field generated by the X-axis compensation coil 4 is uniform. Alternatively, the plurality of X-axis compensation coils 4 may be gradually smaller in size in a direction away from the forming chamber 1, i.e., the size of the X-axis compensation coils 4 is larger as closer to the preset position. The number of turns of the plurality of X-axis compensation coils 4 may also be gradually decreased, that is, the closer to the preset position, the more the number of turns of the X-axis compensation coils 4 is (as shown in fig. 2, the size of the line width indicates how many turns, and the larger the line width, the more turns). The X-axis compensation coil 4, which is gradually reduced in size and/or number of turns, makes the generated compensation magnetic field as uniform as possible in the spatial range.

Correspondingly, a plurality of Y-axis compensation coils can be arranged, and the plurality of Y-axis compensation coils are arranged at equal intervals. And the size and/or number of turns of the plurality of Y-axis compensation coils become gradually smaller in a direction away from the forming chamber 1. The Z-axis compensation coil 5 may be provided in plurality, and the Y-axis compensation coils may be provided at equal intervals. And the plurality of Z-axis compensation coils 5 become gradually smaller in size and/or number of turns in a direction away from the forming chamber 1. The function of which is the same as that of the X-axis compensation coil 4 and will not be described in detail.

In the additive manufacturing apparatus of the embodiment, when additive manufacturing is performed, calibration of the magnetic field strength at a preset position is performed first when the additive manufacturing apparatus is used for the first time, and then additive manufacturing is performed. When the environmental magnetic field of the additive manufacturing device changes, the magnetic field intensity of a preset position is detected through a handheld magnetic field intensity meter or a magnetic field detection device such as a geomagnetic field measuring instrument, when the magnetic field intensity generates deviation for the magnetic field intensity calibrated for the first time, one or more currents of an X-axis compensation coil 4, a Y-axis compensation coil and a Z-axis compensation coil 5 are selected to change according to the deviation condition, and then compensation magnetic fields in corresponding directions are generated to offset the magnetic field intensity of the deviation, so that the magnetic field intensity of the preset position is recovered to a preset value. The preset value in this embodiment may be zero or a preset fixed value.

It should be noted that the generation of the compensation magnetic field in the present embodiment may be performed before each additive manufacturing. The magnetic field compensation step may also be performed when the ambient magnetic field changes.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An additive manufacturing apparatus, comprising a forming chamber (1), a forming cylinder (2) and an electron beam generating device (3) which are positioned in the forming chamber (1), and a three-dimensional compensation coil which is wrapped outside the forming chamber (1), wherein the electron beam generating device (3) emits an electron beam at a forming position of the forming cylinder (2), and the three-dimensional compensation coil is configured to generate a compensation magnetic field so that the magnetic field intensity of a preset position in the forming chamber (1) is a preset value.

2. Additive manufacturing device according to claim 1, wherein the three-dimensional compensation coils comprise X-axis compensation coils (4) oppositely arranged on both sides of the forming chamber (1) in the X direction, Y-axis compensation coils oppositely arranged on both sides of the forming chamber (1) in the Y direction, and Z-axis compensation coils (5) oppositely arranged on both sides of the forming chamber (1) in the Z direction.

3. Additive manufacturing device according to claim 2, wherein the X-axis compensation coil (4) is provided in plurality, and the plurality of X-axis compensation coils (4) are arranged at equal intervals.

4. Additive manufacturing device according to claim 3, wherein the plurality of X-axis compensation coils (4) are progressively smaller in size and/or number of turns in a direction away from the forming chamber (1).

5. An additive manufacturing apparatus according to any one of claims 2 to 4, wherein a plurality of the Y-axis bucking coils are provided, and the plurality of Y-axis bucking coils are arranged at equal intervals.

6. Additive manufacturing device according to claim 5, wherein a plurality of said Y-axis compensation coils are progressively smaller in size and/or number of turns in a direction away from said forming chamber (1).

7. Additive manufacturing device according to any one of claims 2-4, wherein a plurality of Z-axis compensation coils (5) are provided, and a plurality of Z-axis compensation coils (5) are arranged at equal intervals.

8. Additive manufacturing device according to claim 7, wherein the plurality of Z-axis compensation coils (5) are tapered in size and/or number of turns in a direction away from the forming chamber (1).

9. Additive manufacturing device according to any one of claims 2-4, wherein the X-axis compensation coil (4), the Y-axis compensation coil and the Z-axis compensation coil (5) are connected to a direct current power supply.