CN-121988756-A - Additive manufacturing method for parts and additive molded part

CN121988756ACN 121988756 ACN121988756 ACN 121988756ACN-121988756-A

Abstract

The invention discloses a part additive manufacturing method and an additive forming part, and relates to the technical field of additive manufacturing; the method comprises the steps of determining the forming direction of a cylindrical part according to a three-dimensional model, enabling the axis of the cylindrical part to be perpendicular to a substrate, constructing a supporting structure for supporting a suspension structure in the three-dimensional model to obtain a processing model of the cylindrical part, wherein the supporting structure comprises a supporting structure body and a powder cleaning vent pipe which are connected into a whole, the supporting structure body is arranged at one end, close to the suspension structure, of the cylindrical part, the supporting structure body supports the suspension structure, one end of the powder cleaning vent pipe penetrates through the outer side surface of the supporting structure body, the other end of the powder cleaning vent pipe corresponds to one end, close to the suspension structure, of an inner runner and is in non-contact with the end, close to the suspension structure, of the powder cleaning vent pipe is used for ventilating an inner runner, performing additive forming based on the processing model to obtain an additive forming part, cleaning residual powder of the additive forming part, and removing the supporting structure to obtain the cylindrical part.

Inventors

ZHAO DONGMEI
LI QIANCHENG
LIU YEPENG
WU QIAN
GUO WEI

Assignees

鑫精合激光科技有限公司

Dates

Publication Date: 20260508
Application Date: 20241106

Claims (10)

1. The utility model provides a part vibration material disk method which characterized in that is used for shaping the cylindric part that has interior runner and unsettled structure, unsettled structure set up in the one end of cylindric part, interior runner is located in the section of thick bamboo wall of cylindric part, just the one end of interior runner runs through the one end terminal surface of cylindric part that keeps away from unsettled structure, the other end of interior runner runs through the one end of cylindric part that is close to unsettled structure, the part vibration material disk method includes: Acquiring a three-dimensional model of the cylindrical part; Determining a forming direction of the cylindrical part according to the three-dimensional model, and enabling the axis of the cylindrical part to be perpendicular to a substrate; A supporting structure for supporting the suspended structure is built in the three-dimensional model to obtain a processing model of the cylindrical part, wherein the supporting structure comprises a supporting structure body and a powder cleaning vent pipe which are connected into a whole, the supporting structure body is arranged at one end, close to the suspended structure, of the cylindrical part, the supporting structure body supports the suspended structure, one end of the powder cleaning vent pipe penetrates through the outer side face of the supporting structure body, the other end of the powder cleaning vent pipe corresponds to and is not contacted with one end, close to the suspended structure, of the inner runner, and the powder cleaning vent pipe is used for ventilating the inner runner; performing additive forming based on the processing model to obtain an additive forming part; Cleaning residual powder of the additive forming part; And removing the supporting structure to obtain the cylindrical part.
2. The part additive manufacturing method according to claim 1, wherein the suspension structure is a flange structure, the supporting structure body is an annular supporting structure, a plurality of powder cleaning vent pipes are arranged, each powder cleaning vent pipe is arranged along the circumferential direction of the annular supporting structure, and each inner runner corresponds to at least one powder cleaning vent pipe.
3. The method of claim 1, wherein the support structure body is a solid structure, a grid structure, or a hollowed-out structure.
4. The additive manufacturing method of parts according to claim 1, wherein in the three-dimensional model, a supporting structure for supporting the suspended structure is built, the additive manufacturing method of parts further comprises the step of building a surplus cutting structure in the three-dimensional model, wherein the surplus cutting structure is located at one end, far away from the suspended structure, of the cylindrical part, the cylindrical part is placed on the substrate through the surplus cutting structure, the surplus cutting structure is provided with a powder cleaning channel, the powder cleaning channel is communicated with one end, far away from the suspended structure, of the inner runner, and the other end of the powder cleaning channel penetrates through the outer peripheral surface of the surplus cutting structure.
5. The additive manufacturing method of parts according to claim 4, wherein the powder cleaning channel is a circular hole channel formed in the allowance cutting structure or an arch-shaped groove structure formed on one end face of the allowance cutting structure, which is close to the substrate.
6. The additive manufacturing method of parts according to claim 4, wherein the surplus cutting structure is provided with a plurality of powder cleaning channels, the powder cleaning channels are arranged at intervals along the circumferential direction of the surplus cutting structure, and each inner runner is communicated with at least one powder cleaning channel.
7. The part additive manufacturing method according to claim 4, wherein the dimension of the allowance cutting structure is in the range of 3mm to 15mm along the forming direction of the cylindrical part.
8. The part additive manufacturing method of claim 1, further comprising cutting an additive molded part from the substrate prior to removing the support structure; The part additive manufacturing method further includes grinding, polishing, and sandblasting an outer surface of the cylindrical part after removing the support structure.
9. The utility model provides an vibration material disk, its characterized in that, includes cylindric part and bearing structure, cylindric part has interior runner and unsettled structure, unsettled structure set up in the one end of cylindric part, interior runner is located in the section of thick bamboo wall of cylindric part, just the one end of interior runner runs through the one end terminal surface of keeping away from of unsettled structure of cylindric part, the other end of interior runner runs through the cylindric part is close to unsettled structure's one end, bearing structure is including connecting bearing structure body and clear powder breather pipe as an organic whole, the bearing structure body supports unsettled structure, clear powder breather pipe's one end link up the lateral surface of bearing structure body, clear powder breather pipe's the other end with the one end of interior runner that is close to unsettled structure corresponds and non-contact, clear powder breather pipe is used for to ventilate in the interior runner.
10. The additive molded part of claim 9, further comprising a surplus cutting structure disposed at one end of the cylindrical part away from the suspended structure, wherein the surplus cutting structure is provided with a powder cleaning channel, the powder cleaning channel is communicated with one end of the inner flow channel away from the suspended structure, and the other end of the powder cleaning channel penetrates through the outer peripheral surface of the surplus cutting structure.

Description

Additive manufacturing method for parts and additive molded part Technical Field The invention relates to the technical field of additive manufacturing, in particular to a part additive manufacturing method and an additive forming part. Background The special-shaped parts are complex and irregular in shape, and because the special-shaped parts such as a large number of thin walls, inner runners and the like in the aerospace field are severe in use environment, the special-shaped parts not only require higher dimensional accuracy and surface roughness of the parts, but also have higher performance requirements. The traditional machining method is difficult in profile machining, raw materials are wasted, and the performance of the part cast in a casting mode is lower than that of a forging piece. Laser selective melt forming (SELECTIVE LASER MELTING, SLM) is a process that is widely used and has a high degree of maturity. The method is based on the basic idea of rapid prototyping, adopts a layer-by-layer cladding additive manufacturing mode, slices and layers the model according to a certain thickness according to a three-dimensional model of the part, and then uses laser to control molten metal powder through a vibrating mirror under the control of a numerical control system to directly shape the part with a specific geometric shape. The metal powder is completely melted in the SLM forming process, metallurgical bonding is generated, the formed part has the characteristics of good compactness, high tissue performance and the like, and the high-precision complex special-shaped metal part can be formed. With the gradual maturity of the laser selective melting forming technology, the application field of the laser selective melting forming technology is wider and wider, and more new materials are used for the laser selective melting forming technology. The suspended surface, the semi-closed cavity and other structures need to be added with solid supports, grid supports and the like to ensure forming in the printing process, but the suspended surface, the semi-closed cavity and other structures have the following problems that 1, the cavity of a part and a substrate surround to form a closed cavity due to the arrangement of parts in the processing process, metal powder in the closed cavity cannot be timely removed at the moment, 2, the semi-closed cavity or the part containing an inner runner is provided with a powder cleaning hole, the powder cleaning hole is possibly blocked by a supporting structure in the forming process, so that compressed air circulation is not smooth, powder discharging is difficult, however, material resources and manpower are consumed for repeated powder cleaning, a post-treatment period is increased, the workload is increased, and the preparation efficiency is reduced. Moreover, the powder is not cleaned cleanly, and the parts can be scrapped directly seriously. Therefore, how to improve the working efficiency of the powder cleaning to ensure the production quality of parts and reduce the production cost is a technical problem that needs to be solved by the technicians in the field at present. Disclosure of Invention The invention aims to provide a part additive manufacturing method and an additive forming part, and the part additive manufacturing method can improve the working efficiency of powder cleaning so as to ensure the production quality of parts and reduce the production cost. In order to achieve the above object, the present invention provides a method for manufacturing a part additive, for forming a cylindrical part having an inner flow passage and a suspended structure, the suspended structure being disposed at one end of the cylindrical part, the inner flow passage being located in a wall of the cylindrical part, and one end of the inner flow passage penetrating an end face of the cylindrical part, which is far away from the suspended structure, and the other end of the inner flow passage penetrating an end of the cylindrical part, which is near the suspended structure, the method for manufacturing a part additive comprising: Acquiring a three-dimensional model of the cylindrical part; Determining a forming direction of the cylindrical part according to the three-dimensional model, and enabling the axis of the cylindrical part to be perpendicular to a substrate; A supporting structure for supporting the suspended structure is built in the three-dimensional model to obtain a processing model of the cylindrical part, wherein the supporting structure comprises a supporting structure body and a powder cleaning vent pipe which are connected into a whole, the supporting structure body is arranged at one end, close to the suspended structure, of the cylindrical part, the supporting structure body supports the suspended structure, one end of the powder cleaning vent pipe penetrates through the outer side face of the supporting structure body, the other end of the powder cleaning v