阅读说明：本技术 一种slm金属增材制造过程中的冷却辅助装置 (Cooling auxiliary device in SLM metal vibration material disk manufacturing process ) 是由 区炳显 许晨旭 王勤生 程小豹 王群 于 2021-01-11 设计创作，主要内容包括：本发明属于SLM金属增材制造技术领域,具体为一种SLM金属增材制造过程中的冷却辅助装置,包括制造操作台、抽吸罩,所述制造操作台位于抽吸罩的下侧,且用于金属增材制造的激光发生器位于制造操作台、抽吸罩之间,所述制造操作台用于金属增材制造操作,制造操作台内敷设金属粉料层。通过抽吸罩、集热片、吸热管的配合作用,使得制造操作台内部的热量能够上下同时散失,提高散热速率,且能够对金属粉料层加热产生的烟气及一部分热量吸收处理,避免烟气污染周围环境；通过温度传感设备、流量调节阀门的配合作用,能够对冷却媒介的流量调控,从而能够对金属粉料层的散热速率调控,从而适用于不同的使用环境,使得金属增材制造环境较佳。(The invention belongs to the technical field of SLM metal additive manufacturing, and particularly relates to a cooling auxiliary device in an SLM metal additive manufacturing process. Through the cooperation of the suction hood, the heat collecting sheet and the heat absorbing pipe, the heat in the manufacturing operation table can be dissipated up and down simultaneously, the heat dissipation rate is improved, the smoke generated by heating the metal powder layer and a part of heat can be absorbed, and the smoke is prevented from polluting the surrounding environment; through the cooperation of temperature sensing equipment, flow control valve, can regulate and control the flow of cooling medium to can regulate and control the rate of heat dissipation of metal powder layer, thereby be applicable to different service environment, make metal vibration material disk environment preferred.)

1. A cooling auxiliary device in SLM metal additive manufacturing process comprises a manufacturing operation platform (2) and a suction hood (1), and is characterized in that: make operation panel (2) and be located the downside of suction hood (1), and be used for the laser generator that metal vibration material disk made to be located and make operation panel (2), between suction hood (1), make operation panel (2) be used for metal vibration material disk to make the operation, lay the metal powder layer in making operation panel (2), heat to the metal powder layer through laser generator for the shaping of heating position, heat and the flue gas that the heating produced are taken away through suction hood (1) suction, inner groovy (7) have been seted up to the lower surface of making operation panel (2), the inside upside of inner groovy (7) evenly is provided with thermal-arrest piece (8), be provided with heat-absorbing tube (9) on thermal-arrest piece (8), evenly seted up on thermal-arrest piece (8) and passed through hole (12), evenly be provided with on the inner wall that passes hole (12) bulge piece (13), be provided with on the outer wall of heat-absorbing tube (9) with bulge piece (13) position correspond and the indent of looks adaptation The heat absorption pipes (9) are arranged in a zigzag shape, two ends of each heat absorption pipe (9) are positioned on the right side of the rightmost heat collection sheet (8), the two ends of the heat absorption tube (9) are both connected with a connector tube (10), the inner wall of the manufacturing operation table (2) is provided with a temperature sensing device (6), a flow regulating valve (11) is installed on a pipeline of the interface tube (10), the metal additive manufacturing operation is positioned on the middle left side of the inner cavity of the manufacturing operation platform (2), the heat collecting sheet (8) and the heat absorbing tube (9) are arranged on the middle left side of the inner groove (7), during the metal additive manufacturing operation, the heat generated in the inner cavity of the manufacturing operation table (2) is transmitted to a heat absorption pipe (9) through a heat collection sheet (8), a cooling medium is arranged in the heat absorption pipe (9), the heat is taken away through cooling media, the suction hood (1) absorbs heat and smoke from the upper part and is matched with the heat absorption pipe (9) to dissipate heat quickly.

2. The cooling aid device in SLM metal additive manufacturing process of claim 1, wherein: the suction hood (1) is in a hollow conical shape with a small upper part and a large lower part, and the inner wall of the suction hood (1) is coated with an anti-corrosion layer.

3. The cooling aid device in SLM metal additive manufacturing process of claim 1, wherein: the upper end of the suction hood (1) is connected with a suction pipe (3), and a filtering device (4) and an exhaust fan (5) are arranged on a pipeline of the suction pipe (3).

4. A cooling aid device in SLM metal additive manufacturing process according to claim 3, characterised in that: the filter device (4) comprises an outer shell (41), the left side wall and the right side wall of the outer shell (41) are communicated with the suction pipe (3), and a filter sieve plate (44) is arranged in an inner cavity of the outer shell (41).

5. A cooling aid device in SLM metal additive manufacturing process according to claim 4, characterized in that: the lower surface of the outer shell (41) is provided with a bottom cover (45), and the lower side of the filtering sieve plate (44) is supported on the upper surface of the bottom cover (45).

6. A cooling aid device in SLM metal additive manufacturing process according to claim 4, characterized in that: the left side and the right side on the upper portion of the inner cavity of the outer shell (41) are both connected with supporting springs (43), one end of each supporting spring (43) viewed from the opposite side is connected with clamping blocks (42), and the clamping blocks (42) are respectively clamped on the upper portions of the two side walls of the filtering sieve plate (44).

7. A cooling aid device in SLM metal additive manufacturing process according to claim 6, characterized in that: the lower parts of the side walls of the two clamping blocks (42) are arranged in an inclined shape.

Technical Field

The invention relates to the technical field of SLM metal additive manufacturing, in particular to a cooling auxiliary device in the SLM metal additive manufacturing process.

Background

Additive manufacturing is commonly known as 3D printing, combines computer aided design, material processing and forming technology, and is a manufacturing technology for manufacturing solid objects by stacking special metal materials, non-metal materials and medical biomaterials layer by layer in modes of extrusion, sintering, melting, photocuring, spraying and the like through a software and numerical control system on the basis of a digital model file. Compared with the traditional processing mode of removing, cutting and assembling raw materials, the method is a manufacturing method through material accumulation from bottom to top, and is from top to bottom. This enables the manufacture of complex structural components that were previously constrained by conventional manufacturing methods and were not possible.

SLM: selectivalasermulting (selective laser melting) is a main technical approach in the additive manufacturing of metal materials. The technology selects laser as an energy source, scans layer by layer on a metal powder bed layer according to a planned path in a three-dimensional CAD slicing model, achieves the effect of metallurgical bonding by melting and solidifying the scanned metal powder, and finally obtains the metal part designed by the model.

The SLM technique overcomes the difficulties associated with the conventional techniques for manufacturing metal parts having complex shapes. It can directly form metal parts with almost full compactness and good mechanical properties.

The heat dissipation of the existing SLM processing equipment to the material is slow, so that the metal material is difficult to be rapidly cooled, solidified and formed, and the processing efficiency is reduced.

Disclosure of Invention

The invention aims to provide a cooling auxiliary device in the SLM metal additive manufacturing process, and aims to solve the problems that the heat dissipation of the existing SLM processing equipment in the background art to the material is slow, so that the metal material is difficult to be rapidly cooled, solidified and formed, and the processing efficiency is reduced.

In order to achieve the purpose, the invention provides the following technical scheme: a cooling auxiliary device in the SLM metal additive manufacturing process comprises a manufacturing operation platform and a suction cover, wherein the manufacturing operation platform is located on the lower side of the suction cover, a laser generator used for metal additive manufacturing is located between the manufacturing operation platform and the suction cover, the manufacturing operation platform is used for metal additive manufacturing operation, a metal powder layer is laid in the manufacturing operation platform, the metal powder layer is heated through the laser generator, a heating position is formed, heat and smoke generated by heating are sucked and taken away through the suction cover, an inner groove is formed in the lower surface of the manufacturing operation platform, a heat collecting sheet is uniformly arranged on the upper side in the inner groove, heat absorbing pipes are arranged on the heat collecting sheet, through holes are uniformly formed in the heat collecting sheet, protruding blocks are uniformly arranged on the inner wall of the through holes, inner pits corresponding to the protruding blocks in position and matched with the protruding blocks are arranged on the outer wall of the heat absorbing pipes, the heat absorption pipe is arranged in a turning-back shape, two ends of the heat absorption pipe are located on the right side of the rightmost heat collection sheet, two ends of the heat absorption pipe are connected with the interface pipe, the inner wall of the manufacturing operation table is provided with temperature sensing equipment, a flow regulating valve is mounted on a pipeline of the interface pipe, metal additive manufacturing operation is located on the middle left side of an inner cavity of the manufacturing operation table, the heat collection sheet and the heat absorption pipe are arranged on the middle left side of an inner groove, during metal additive manufacturing operation, heat generated in the inner cavity of the manufacturing operation table is transmitted to the heat absorption pipe through the heat collection sheet, cooling media are arranged in the heat absorption pipe, the heat is taken away through the cooling media, and a suction cover absorbs heat and smoke from the upper portion and.

Preferably, the suction hood is in a hollow conical shape with a small top and a large bottom, and the inner wall of the suction hood is coated with a corrosion-proof layer.

Preferably, the upper end of the suction hood is connected with a suction pipe, and a filtering device and an exhaust fan are arranged on a pipeline of the suction pipe.

Preferably, the filter equipment includes the shell body, the lateral wall and the suction tube intercommunication about the shell body, the inner chamber of shell body is provided with the filtration sieve.

Preferably, the lower surface of the outer casing is provided with a bottom cover, and the lower side of the filter sieve plate is supported on the upper surface of the bottom cover.

Preferably, the left side and the right side on the upper portion of the inner cavity of the outer shell are both connected with supporting springs, the two sides of the supporting springs are both connected with clamping blocks at one end of the supporting springs in a viewing mode, and the clamping blocks are clamped on the upper portions of the two side walls of the filtering sieve plate respectively.

Preferably, lower portions of the side walls of the two holding blocks are inclined.

Compared with the prior art, the invention has the beneficial effects that:

1) through the cooperation of the suction hood, the heat collecting sheet and the heat absorbing pipe, the heat in the manufacturing operation table can be dissipated up and down simultaneously, the heat dissipation rate is improved, the smoke generated by heating the metal powder layer and a part of heat can be absorbed, and the smoke is prevented from polluting the surrounding environment;

2) through the cooperation of temperature sensing equipment, flow control valve, can regulate and control the flow of cooling medium to can regulate and control the rate of heat dissipation of metal powder layer, thereby be applicable to different service environment, make metal vibration material disk environment preferred.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of a filter device according to the present invention;

FIG. 3 is a schematic cross-sectional view of a manufacturing station according to the present invention;

FIG. 4 is a schematic bottom view of a manufacturing station according to the present invention;

fig. 5 is a side view schematically illustrating the heat collecting plate of fig. 4 according to the present invention.

In the figure: 1 suction hood, 2 manufacturing operation table, 3 suction pipe, 4 filtering device, 41 outer shell, 42 clamping block, 43 supporting spring, 44 filtering sieve plate, 45 bottom cover, 5 exhaust fan, 6 temperature sensing device, 7 inner groove, 8 heat collecting sheet, 9 heat absorbing pipe, 10 interface pipe, 11 flow regulating valve, 12 passing hole, 13 protruding block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being 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.

Example (b):

referring to fig. 1-5, the present invention provides a technical solution: a cooling auxiliary device in an SLM metal additive manufacturing process comprises a manufacturing operation platform 2 and a suction hood 1, wherein the manufacturing operation platform 2 is located on the lower side of the suction hood 1, and a laser generator for metal additive manufacturing is located between the manufacturing operation platform 2 and the suction hood 1.

And selecting laser of a laser generator as an energy source, scanning layer by layer on a metal powder bed layer according to a planned path in the three-dimensional CAD slicing model, melting and solidifying the scanned metal powder to achieve the effect of metallurgical bonding, and finally obtaining the metal part designed by the model.

The manufacturing operation platform 2 is used for metal additive manufacturing operation, a metal powder layer is laid in the manufacturing operation platform 2, the metal powder layer is heated through a laser generator, a heating position is formed, and heat and smoke generated by heating are sucked and taken away through the suction hood 1.

The metal powder layer is heated and combusted, the generated smoke is intensively sucked by the suction hood 1, the heat generated by heating and combusting the metal powder layer heats the surrounding air, the heating volume of the air is increased and rises, and the suction hood 1 is convenient for intensively collecting the hot air.

The lower surface of the manufacturing operation table 2 is provided with an inner groove 7, the inner upper side of the inner groove 7 is uniformly provided with a heat collecting sheet 8, the heat collecting sheet 8 is provided with a heat absorbing pipe 9, the heat collecting sheet 8 is uniformly provided with a through hole 12, the inner wall penetrating the hole 12 is uniformly provided with a convex block 13, the outer wall of the heat absorbing pipe 9 is provided with an inner pit corresponding to the convex block 13 in position and matched with the convex block, the heat absorbing pipe 9 is arranged in a turn-back shape, the two ends of the heat absorbing pipe 9 are located on the right side of the rightmost heat collecting sheet 8, and the two ends of the heat absorbing pipe 9 are connected with a mouthpiece 10.

The heat generated by heating and burning the metal powder layer in the manufacturing operation table 2 is transmitted to the heat collecting sheets 8 through the manufacturing operation table 2, the heat is dissipated to the heat absorbing pipe 9 through the heat collecting sheets 8, flowing cooling media are arranged in the heat absorbing pipe 9, the cooling media absorb the heat on the heat absorbing pipe 9 and take away the heat, the connection between the heat absorbing pipe 9 and the heat collecting sheets 8 is stable through the matching effect of the convex blocks 13 and the inner pits, the contact area between the heat absorbing pipe 9 and the heat collecting sheets 8 is increased, and therefore the heat dissipation rate can be improved.

The inner wall of the manufacturing operation table 2 is provided with a temperature sensing device 6, a pipeline of the interface tube 10 is provided with a flow regulating valve 11, metal additive manufacturing operation is located on the middle left side of the inner cavity of the manufacturing operation table 2, a heat collecting sheet 8 and a heat absorbing tube 9 are arranged on the middle left side of the inner groove 7, when the metal additive manufacturing operation is conducted, heat generated by the inner cavity of the manufacturing operation table 2 is transmitted to the heat absorbing tube 9 through the heat collecting sheet 8, a cooling medium is arranged in the heat absorbing tube 9 and is taken away through the cooling medium, and the suction cover 1 absorbs heat and smoke from the upper portion and is matched with the heat absorbing tube 9 to dissipate heat quickly.

The scheme is that a processor is arranged, the output end of a temperature sensing device 6 is connected with the input end of the processor, the input end of a flow regulating valve 11 is connected with the output end of the processor, a normal temperature value range is stored in the processor in advance, the temperature inside a manufacturing operation table 2 is detected through the temperature sensing device 6, the detected temperature value is output to the processor, the processor compares the detected temperature value with the normal temperature value range, and if the detected temperature value is within the normal temperature value range, the current flow regulating valve 11 is kept to control the flow of a cooling medium; if the detected temperature value is larger than the normal temperature range, the flow of the cooling medium is controlled to be increased through the flow regulating valve 11, so that the heat dissipation rate is increased, and the temperature is reduced; if the detected temperature value is smaller than the normal temperature range, the flow of the cooling medium is controlled to be reduced through the flow regulating valve 11, so that the heat dissipation rate is reduced, and the internal temperature of the manufacturing operation platform 2 is raised back to the normal temperature range.

Further, the suction hood 1 is in a hollow conical shape with a small upper part and a large lower part, the inner wall of the suction hood 1 is coated with an anti-corrosion layer, and the anti-corrosion performance of the suction hood 1 is improved and the service life of the suction hood 1 is prolonged by the arrangement of the anti-corrosion layer.

Furthermore, the upper end of the suction hood 1 is connected with a suction pipe 3, a pipeline of the suction pipe 3 is provided with a filtering device 4 and an exhaust fan 5, the suction effect of the suction pipe 3 and the suction hood 1 is realized through the arrangement of the exhaust fan 5, and the gas filtering effect of suction can be realized through the arrangement of the filtering device 4.

Further, filter equipment 4 includes shell body 41, the left and right sides lateral wall and the suction tube 3 intercommunication of shell body 41, the inner chamber of shell body 41 is provided with filters sieve 44, through the setting of filtering sieve 44, realizes the filtration effect to the air.

Further, the lower surface of shell body 41 is provided with bottom cover 45, the downside of filtering sieve 44 supports on the upper surface of bottom cover 45, through the setting of bottom cover 45, conveniently carries out dismouting change effect to filtering sieve 44.

Further, the left and right sides on shell body 41 inner chamber upper portion all is connected with supporting spring 43, both sides supporting spring 43 looks one end all is connected with grip block 42, two grip block 42 centre gripping respectively is on the both sides wall upper portion of filtering sieve 44, through supporting spring 43, grip block 42's mating reaction, can be to filtering sieve 44 from both sides elasticity centre gripping to make filtering sieve 44 stable support, have certain buffering antidetonation effect.

Further, the lower parts of the side walls of the two clamping blocks 42 are inclined, and the inclined parts of the clamping blocks 42 facilitate the filter sieve plate 44 to be pushed up from the lower side.

While there have been shown and described the fundamental principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.