阅读说明：本技术 一种高效批量化增材制造方法 (Efficient batch additive manufacturing method ) 是由 吴冬冬 钱远宏 焦世坤 宋国华 刘莹莹 许旭鹏 刘程程 于 2019-10-09 设计创作，主要内容包括：本发明提出一种高效批量化增材制造方法,包括工艺余量模型处理,批量制造模型处理,以及增材制造三个步骤。其中,工艺余量模型处理包括分析零件结构特点,综合考虑零件机加工、装配要求和增材制造直接成形精度,设计增材制造毛坯件工艺余量,获得工艺余量模型；批量制造模型处理包括根据工艺余量模型的结构特点及增材制造成形特点,确定高效批量化增材制造的零件成形叠加摆放方式。本发明的成形零件尺寸精度高、机加余量小、产品性能好；能够有效提高生产效率、材料利用率和设备利用率,有效降低生产成本,能够有效适应复杂结构的快速生产验证,促进武器装备的快速迭代升级。(The invention provides an efficient batch additive manufacturing method which comprises three steps of process allowance model processing, batch manufacturing model processing and additive manufacturing. The processing of the process allowance model comprises analyzing the structural characteristics of parts, comprehensively considering part machining and assembling requirements and direct forming precision of additive manufacturing, designing the process allowance of the blank part for additive manufacturing, and obtaining the process allowance model; the batch manufacturing model processing comprises the step of determining a part forming, stacking and placing mode for efficient batch additive manufacturing according to the structural characteristics of the process allowance model and the additive manufacturing forming characteristics. The formed part has high dimensional precision, small machining allowance and good product performance; the production efficiency, the material utilization rate and the equipment utilization rate can be effectively improved, the production cost is effectively reduced, the rapid production verification of a complex structure can be effectively adapted, and the rapid iterative upgrade of weaponry is promoted.)

1. An efficient batch additive manufacturing method, comprising:

s1, processing by a process allowance model: analyzing the structural characteristics of the part, comprehensively considering the machining and assembling requirements of the part and the direct forming precision of additive manufacturing, designing the process allowance of the blank part for additive manufacturing, obtaining a process allowance model, and enabling the formed blank part to meet the design requirement through simple machining;

s2, batch manufacturing model processing: determining a part forming, stacking and placing mode for efficient batch additive manufacturing according to the structural characteristics of the process allowance model and the additive manufacturing and forming characteristics;

s3, additive manufacturing: importing the batch manufacturing model into additive manufacturing data processing software, and carrying out model array to enable the model array to fill the whole substrate breadth to obtain a model process package; slicing the model process packet by adopting a slicing module; loading the slice file into the additive manufacturing equipment, selecting a correct forming parameter package, obtaining an additive manufacturing program file, completing the preparation work of the additive manufacturing equipment, and starting additive manufacturing.

2. The additive manufacturing method according to claim 1, wherein in the step S2, the parts are arranged in a single longitudinal direction or in a face-to-face longitudinal direction.

3. The additive manufacturing method according to claim 1, wherein in the step S2, the stacking means is an array, a mirror image, or a re-design means of a model with changed size.

4. The additive manufacturing method of claim 1, wherein in step S2, a maximum height of the shaped pose is lower than a maximum shapeable height of the additive manufacturing apparatus.

Technical Field

The invention belongs to the technical field of additive manufacturing and processing design, and particularly relates to a high-efficiency batch additive manufacturing method.

Background

With the leap-type promotion of advanced aerospace technology, the new generation of aircraft is rapidly developing towards high speed, long range and light weight. The novel aircraft is equipped to chooseing for use of material and spare part structural design requirement is higher and higher, compares traditional industrial field, and the spare part of aerospace craft has that product structure is complicated, performance requirement is high, nonstandard structure type is many, production batch ization degree is low etc. characteristics. The application of a large number of complex non-standard structures puts higher requirements on the processing and manufacturing technology of products, the traditional processing method is difficult to meet the high-efficiency small-batch production of non-standard parts, and the defects of low production efficiency, low material utilization rate and the like exist.

The additive manufacturing has the characteristics of high forming precision, high production efficiency, easiness in forming complex structures and the like, is widely applied to military weaponry such as aerospace and the like, can better adapt to rapid production verification of complex nonstandard structures, and promotes rapid iterative upgrading of weaponry. However, the additive manufacturing has high requirements on forming conditions, parts need to be formed on the substrate, the forming process needs to be performed in an inert gas or vacuum environment, and auxiliary work such as powder screening, substrate heating, oxygen replacement, part cooling and fishing exists before and after the additive manufacturing. For parts with small height, the time proportion occupied by auxiliary work in the whole forming process is high, the forming waiting time is long, the production efficiency of the parts is low, and the utilization rate of equipment resources is low.

Disclosure of Invention

Technical problem to be solved

The invention provides an efficient batch additive manufacturing method, which aims to solve the technical problem of how to perform batch additive manufacturing.

(II) technical scheme

In order to solve the above technical problem, the present invention provides an efficient additive manufacturing method in batch, which includes the following steps:

s1, processing by a process allowance model: analyzing the structural characteristics of the part, comprehensively considering the machining and assembling requirements of the part and the direct forming precision of additive manufacturing, designing the process allowance of the blank part for additive manufacturing, obtaining a process allowance model, and enabling the formed blank part to meet the design requirement through simple machining;

s2, batch manufacturing model processing: determining a part forming, stacking and placing mode for efficient batch additive manufacturing according to the structural characteristics of the process allowance model and the additive manufacturing and forming characteristics;

s3, additive manufacturing: importing the batch manufacturing model into additive manufacturing data processing software, and carrying out model array to enable the model array to fill the whole substrate breadth to obtain a model process package; slicing the model process packet by adopting a slicing module; loading the slice file into the additive manufacturing equipment, selecting a correct forming parameter package, obtaining an additive manufacturing program file, completing the preparation work of the additive manufacturing equipment, and starting additive manufacturing.

Further, in step S2, the parts are arranged in a single longitudinal direction or in a face-to-face longitudinal direction.

Further, in step S2, the overlay mode is an array, mirror image or re-design mode of the model with changed size.

Further, in step S2, the maximum height of the shaped pose is lower than the maximum shapeable height of the additive manufacturing apparatus.

(III) advantageous effects

The efficient batch additive manufacturing method provided by the invention comprises three steps of process allowance model processing, batch manufacturing model processing and additive manufacturing. The processing of the process allowance model comprises analyzing the structural characteristics of parts, comprehensively considering part machining and assembling requirements and direct forming precision of additive manufacturing, designing the process allowance of the blank part for additive manufacturing, and obtaining the process allowance model; the batch manufacturing model processing comprises the step of determining a part forming, stacking and placing mode for efficient batch additive manufacturing according to the structural characteristics of the process allowance model and the additive manufacturing forming characteristics.

The efficient batch additive manufacturing method has the advantages that the formed parts are high in dimensional accuracy, small in machining allowance and good in product performance; the production efficiency, the material utilization rate and the equipment utilization rate can be effectively improved, the production cost is effectively reduced, the rapid production verification of a complex structure can be effectively adapted, and the rapid iterative upgrade of weaponry is promoted.

Drawings

Fig. 1 is a schematic diagram of an efficient batch additive manufacturing method according to an embodiment of the present invention;

FIG. 2 is a schematic view of a process margin model 1 in an embodiment of the invention;

FIG. 3 is a schematic view of a batch manufacturing model 2 in an embodiment of the present invention;

FIG. 4 is a schematic diagram of an efficient additive manufacturing model file in an embodiment of the invention.

Detailed Description

In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.

In this embodiment, a method for efficiently manufacturing non-standard nuts in an additive manufacturing manner in a batch manner is provided, as shown in fig. 1 (an arrow indicates an additive manufacturing deposition direction), the method specifically includes the following steps:

s1 processing a process margin model

Analyzing the structural characteristics of the part, comprehensively considering the machining and assembling requirements of the part and the direct forming precision of additive manufacturing, and designing the process allowance of the blank part for additive manufacturing so that the blank part can meet the design requirement through simple machining after being formed. In this embodiment, the external thread of the nut is not printed, and 1mm machining allowance is left on the external surface and two end surfaces of the nut respectively to obtain a process allowance model 1, as shown in fig. 2.

S2 batch manufacturing model processing

And determining an efficient batch forming process scheme according to the structural characteristics of the process allowance model 1. The structural characteristics of the process allowance model moedl 1 and the additive manufacturing and forming characteristics are comprehensively considered, the part forming and placing direction and the efficient batch forming and stacking placing mode are determined, in the embodiment, the part forming and placing direction is arranged in a longitudinal single direction, model stacking and placing are performed in a mirror image and array mode, and a batch manufacturing model 2 is obtained, as shown in fig. 3.

S3 additive manufacturing

Importing the batch manufacturing model 2 into additive manufacturing special data processing software, and performing a model array to fill the whole substrate breadth to obtain a model process package model file, as shown in FIG. 3; slicing the model process packet model file by using a slicing module; loading the slice file into additive manufacturing equipment, selecting a correct forming parameter package to obtain an additive manufacturing program file, completing preparation work of the additive manufacturing equipment, and starting printing.

The maximum height 280mm of the efficient batch forming placement is lower than the maximum formable height 300mm of the forming equipment.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.