阅读说明：本技术 一种用于激光增材制造的辅助装备 (Auxiliary equipment for laser additive manufacturing ) 是由 周阳 朱强 唐茂倍 李瑶 刘朝阳 于 2020-12-30 设计创作，主要内容包括：本发明属于增材制造技术领域,具体公开了一种用于激光增材制造的辅助装备,包括支架、磁温调控装置和驱动装置；其中,磁温调控装置架设于支架的一端,磁温调控装置包括与支架转动连接的护板组件、设置于护板组件的框体相对两侧壁的两电磁铁组件、以及架设于两电磁铁组件之间的控温底座；驱动装置架设于支架的另一端并驱动两电磁铁组件绕控温底座旋转。以此结构设计的辅助装置,通过对两电磁铁组件绕控温底座转动时所形成的磁场,以及控温底座上的温度场的同步调控,能够方便的实现激光增材制造过程中的熔池凝固参数的调控,进而达到调节打印件凝固组织的目的。(The invention belongs to the technical field of additive manufacturing, and particularly discloses auxiliary equipment for laser additive manufacturing, which comprises a bracket, a magnetic temperature regulating and controlling device and a driving device, wherein the bracket is arranged on the bracket; the magnetic temperature regulating device is erected at one end of the support and comprises a guard plate assembly, two electromagnet assemblies and a temperature control base, wherein the guard plate assembly is rotatably connected with the support, the two electromagnet assemblies are arranged on two opposite side walls of a frame body of the guard plate assembly, and the temperature control base is erected between the two electromagnet assemblies; the driving device is erected at the other end of the support and drives the two electromagnet assemblies to rotate around the temperature control base. With this structural design's auxiliary device, through the magnetic field that forms to two electromagnet assembly when rotating around accuse temperature base to and the synchronous regulation and control of the temperature field on the accuse temperature base, the regulation and control of the molten bath solidification parameter in the realization laser vibration material disk manufacturing process that can be convenient, and then reach the purpose of adjusting the printing piece solidification tissue.)

1. An aid for laser additive manufacturing, comprising:

a support (1);

the magnetic temperature regulating and controlling device (2) is erected at one end of the support (1), and the magnetic temperature regulating and controlling device (2) comprises a guard plate assembly rotatably connected with the support (1), two electromagnet assemblies arranged on two opposite side walls of a frame body (211) of the guard plate assembly, and a temperature control base (23) erected between the two electromagnet assemblies;

and the driving device is erected at the other end of the support (1) and drives the two electromagnet assemblies to rotate around the temperature control base (23).

2. Auxiliary equipment for laser additive manufacturing according to claim 1, characterized in that a support rod is fastened vertically at one end of the support (1), and the temperature control base (23) is fastened at the upper end of the support rod.

3. Auxiliary equipment for laser additive manufacturing according to claim 2, characterized in that the support rod is sleeved with a hollow shaft (25), and the hollow shaft (25) is rotatably connected with the mounting seat (213) of the guard plate assembly.

4. Auxiliary equipment for laser additive manufacturing according to claim 3, characterized in that the driving device comprises a motor (31) mounted at the other end of the support (1), a driven wheel mounted at the exposed end of the hollow shaft (25), and a timing belt (32) mounted between the driving wheel of the motor (31) and the driven wheel.

5. The auxiliary equipment for laser additive manufacturing of claim 3, wherein the guard plate assembly comprises the frame body (211), a U-shaped frame (212) fastened with two opposite side walls of the frame body (211), and the mounting seat (213) fastened with the bracket (1) and arranged below the U-shaped frame (212).

6. The auxiliary equipment for laser additive manufacturing of claim 5, wherein the hollow shaft (25) is inserted into the U-shaped frame (212) and exposed out of the lower bottom surface of the mounting seat (213), and the hollow shaft (25) is fastened with the U-shaped frame (212).

7. Auxiliary equipment for laser additive manufacturing according to claim 3, characterized in that the support rod is arranged through the hollow shaft (25) and fastened at its lower end to the bracket (1).

8. Auxiliary equipment for laser additive manufacturing according to claim 3, characterized in that the electromagnet assembly comprises an excitation coil (221), and a magnet (222) coaxially cooperating with the excitation coil (221), the magnet (222) facing one end of the temperature controlled base (23) and being arranged in a frustum shape.

9. The auxiliary equipment for laser additive manufacturing of claim 4, wherein the temperature control base (23) comprises a cooling plate (231) provided with a water path, a water cooling interface (232) arranged on the outer peripheral surface of the cooling plate (231), and a temperature sensor (233) arranged on the cooling plate (231), wherein the water cooling interface (232) is connected with an external water cooling device.

10. Auxiliary equipment for laser additive manufacturing according to claim 9, wherein the motor (31), the electromagnet assembly, the temperature sensor (233) and the external water cooling device are all electrically connected with an external electric control device.

Technical Field

The invention relates to the technical field of additive manufacturing, in particular to auxiliary equipment for laser additive manufacturing.

Background

The additive manufacturing is a novel manufacturing process integrating computer aided design and material forming technology. Different from the traditional material reducing manufacturing process, the material increasing manufacturing is that a computer slices a geometric solid three-dimensional model to be processed to generate a processing path code, and the processing path code is overlapped point by point layer by layer under the control of the computer to perform solid manufacturing. The characteristics of near net shape forming and free forming reduce the manufacturing cost and liberate the idea of a designer. According to different energy sources, additive manufacturing can be divided into high-energy beam additive manufacturing (using laser and electron beams as energy sources) and non-high-energy beam additive manufacturing (using resistance heating and using a special light source as energy sources). The high energy beam with high energy density can be used for processing refractory materials such as metal, ceramic and the like, and has attracted great attention in the fields of commerce and research. The use of lasers has lower environmental requirements than electron beams, and the research of laser additive manufacturing is the most extensive among them.

The rapid solidification and high energy density in the laser cladding deposition manufacturing process enable a molten pool to have a high temperature gradient and a directional temperature gradient direction, so that the structure of a printed product has a tendency of forming columnar crystals in the height direction, and parts have anisotropy. Meanwhile, the high temperature gradient and the thermal stress caused by rapid thermal cycling cause the defects of cracks and the like of the parts. And the interaction among laser, powder, base material and environment presents non-uniformity and uncertainty in time space, which causes macroscopic heat and mass transfer to solidification and nucleation in a microscopic molten pool, and the crystal growth also has instability. Resulting in the eventual generation of an inhomogeneous and uncontrollable coagulated tissue.

Researchers in the related art have made some corresponding studies on the above problems. In the related technology, an ultrasonic cavitation effect is utilized, an ultrasonic vibration system is additionally arranged on a printing substrate, and a component with uniform, fine and isometric crystals is printed through optimization of process parameters and process regulation and control of a super-vibration platform. But the intensity of the ultrasonic vibration is obviously reduced along with the increase of the size of the part, the process has limits on the size and the shape of the part, and the uniformity of the ultrasonic energy acting in the molten pool is difficult to ensure; IN addition, the appearance of a precipitated phase of the laser cladding deposition IN718 is regulated and controlled by adding a rotating magnetic field, so that the performance of a printed product is improved. However, this method is not effective in controlling the ambient temperature.

Disclosure of Invention

The invention aims to provide auxiliary equipment for laser additive manufacturing, which can realize the regulation and control of a molten pool solidification parameter in the laser additive manufacturing process through synchronous regulation and control of a magnetic field and a temperature field, and further achieve the purpose of regulating a solidification structure of a printed product.

In order to achieve the purpose, the invention adopts the following technical scheme:

an aid for laser additive manufacturing, comprising:

a support;

the magnetic temperature regulating and controlling device is erected at one end of the bracket and comprises a guard plate assembly rotatably connected with the bracket, two electromagnet assemblies arranged on two opposite side walls of a frame body of the guard plate assembly and a temperature control base erected between the two electromagnet assemblies;

and the driving device is erected at the other end of the support and drives the two electromagnet assemblies to rotate around the temperature control base.

The temperature control device comprises a support, a temperature control base and a temperature control base, wherein a support rod is vertically fastened at one end of the support, and the temperature control base is fastened at the upper end of the support rod.

The supporting rod is sleeved with a hollow shaft, and the hollow shaft is rotatably connected with the mounting seat of the guard plate assembly.

The driving device comprises a motor erected at the other end of the support, a driven wheel arranged at the exposed end of the hollow shaft, and a synchronous belt arranged between a driving wheel of the motor and the driven wheel.

The guard plate assembly comprises a frame body, a U-shaped frame fastened with two opposite side walls of the frame body, and a mounting seat arranged below the U-shaped frame and fastened with the support.

The hollow shaft penetrates through the U-shaped frame and is exposed out of the lower bottom surface of the mounting seat, and the hollow shaft is fastened with the U-shaped frame.

Wherein, the bracing piece wears to locate hollow shaft and lower extreme and support fastening.

The electromagnet assembly comprises an excitation coil and a magnet coaxially matched with the excitation coil, and the magnet faces towards one end of the temperature control base and is arranged in a frustum shape.

The temperature control base comprises a cooling plate, a water cooling interface and a temperature sensor, wherein the cooling plate is provided with a water channel, the water cooling interface is arranged on the outer peripheral surface of the cooling plate, the temperature sensor is arranged on the cooling plate, and the water cooling interface is connected with an external water cooling device.

The motor, the electromagnet assembly, the temperature sensor and the external water cooling device are all electrically connected with an external electric control device.

The invention has the beneficial effects that: the invention discloses auxiliary equipment for laser additive manufacturing, which comprises a bracket, a magnetic temperature regulating and controlling device and a driving device, wherein the bracket is provided with a magnetic temperature regulating and controlling device; the magnetic temperature regulating device is erected at one end of the support and comprises a guard plate assembly, two electromagnet assemblies and a temperature control base, wherein the guard plate assembly is rotatably connected with the support, the two electromagnet assemblies are arranged on two opposite side walls of a frame body of the guard plate assembly, and the temperature control base is erected between the two electromagnet assemblies; the driving device is erected at the other end of the support and drives the two electromagnet assemblies to rotate around the temperature control base. With this structural design's auxiliary device, through the magnetic field that forms to two electromagnet assembly when rotating around accuse temperature base to and the synchronous regulation and control of the temperature field on the accuse temperature base, the regulation and control of the molten bath solidification parameter in the realization laser vibration material disk manufacturing process that can be convenient, and then reach the purpose of adjusting the printing piece solidification tissue.

Drawings

Fig. 1 is an isometric view of an auxiliary apparatus for laser additive manufacturing of the present invention.

FIG. 2 is an isometric view of the fender assembly of FIG. 1.

FIG. 3 is an isometric view of the apron assembly of FIG. 1 assembled with the electromagnet assembly.

In the figure:

1. a support;

2. a magnetic temperature regulating device; 211. a frame body; 212. a U-shaped frame; 213. a mounting seat; 221. a field coil; 222. a magnet; 23. a temperature control base; 231. a cooling plate; 232. a water-cooling interface; 233. a temperature sensor; 25. a hollow shaft;

31. a motor; 32. and (4) a synchronous belt.

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, removably 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. 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.

With reference to fig. 1 to 3, this embodiment provides an auxiliary equipment for laser additive manufacturing, including support 1, magnetism temperature regulation and control device 2 and drive arrangement, it is specific, magnetism temperature regulation and control device 2 erects in the one end of support 1, magnetism temperature regulation and control device 2 includes the backplate subassembly of being connected with support 1 rotation, set up two electromagnet assembly of the relative both sides wall inboard of framework 211 of backplate subassembly, and erect temperature control base 23 between two electromagnet assembly, as preferred, this embodiment has set up the laser cladding head in the top between two electromagnet assembly.

Preferably, the shield assembly includes a frame 211, a U-shaped frame 212 fastened to two opposite side walls of the frame 211, and a mounting seat 213 fastened to the bracket 1 and disposed below the U-shaped frame 212, and in order to drive the two electromagnet assemblies to rotate around the temperature control base 23, the U-shaped frame 212 and the mounting seat 213 in this embodiment are rotatably connected.

Preferably, the support 1 in this embodiment is vertically fastened with a support rod, and the upper end of the support rod is fastened with a temperature control base 23. In order to drive the guard plate assembly to rotate around the supporting rod, the hollow shaft 25 is sleeved on the periphery of the supporting rod, the hollow shaft 25 penetrates through the U-shaped frame 212 and is exposed out of the lower bottom surface of the mounting seat 213, the hollow shaft 25 is fastened with the U-shaped frame 212, the supporting rod penetrates through the hollow shaft 25, the lower end of the supporting rod is fastened with the bracket 1, and the hollow shaft 25 and the mounting seat 213 of the guard plate assembly are connected in a rotating mode after the supporting rod is mounted. And the hollow shaft 25 is driven to rotate by a driving device arranged at the other end of the bracket 1, and then the U-shaped bracket 212 is driven to rotate.

Preferably, the driving device of the present embodiment includes a motor 31 mounted on the other end of the frame 1, a driven pulley mounted on the exposed end of the hollow shaft 25, and a timing belt 32 mounted between the driving pulley and the driven pulley of the motor 31. When the motor 31 rotates, the hollow shaft 25 can be driven to rotate by the synchronous belt, so that the electromagnet assemblies erected on the two opposite side walls of the frame body 211 rotate around the temperature control base 23.

More specifically, the electromagnet assembly in this embodiment includes an excitation coil 221 and a magnet 222 coaxially matched with the excitation coil 221, and the magnet 222 faces one end of the temperature control base 23 and is disposed in a frustum shape. Therefore, under the driving action of the driving device, the two electromagnet assemblies which are oppositely arranged rotate around the temperature control base 23 at different rotating speeds.

In addition, in order to better sense the temperature of the workpiece and lower the temperature of the workpiece during processing, preferably, the temperature control base 23 in this embodiment includes a cooling plate 231 provided with a water channel, a water cooling port 232 provided on the outer peripheral surface of the cooling plate 231, and a temperature sensor 233 provided on the cooling plate 231, and the water cooling port 232 is connected to an external water cooling device. With the adoption of the auxiliary equipment with the structural design, the motor 31, the electromagnet assembly, the temperature sensor 233 and the external water cooling device are electrically connected with an external electric control device.

In addition, the specific control of the water path and the specific connection between the temperature sensor 233 and the external electric control device are commonly used in the related art, and are not described in detail herein.

The auxiliary equipment designed by the scheme is mainly applied to the additive manufacturing process in a direct energy deposition mode, the laser cladding head is directly arranged on the base of the additive manufacturing equipment, after the printing substrate is arranged on the temperature control base, the laser cladding head prints in the center of a magnetic field after the laser additive manufacturing equipment and the control system of the system are opened. In the printing process, the temperature sensor 233 on the temperature control base can monitor the temperature of the printing substrate in real time and automatically adjust the on-off of the cooling medium on the base, so that the temperature of the substrate is controlled in a stable range. The solidification parameters are regulated and controlled manually in the printing process or by presetting the magnetic field rotating speed and the magnetic field intensity before printing, so that the regulation and control of the solidification structure are realized.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.