发明内容 SUMMARY

[0004]为了克服现有技术的缺点，本发明的目的在于提供一种砂型复合成形方法，能快速加工任意形状的铸型，同时比都用其中一种技术成形在效率上更快，精度更高，进而避免了铸型的缺陷和不足。 [0004] In order to overcome the disadvantages of the prior art, the object of the present invention is to provide a method of forming a composite of sand, fast processing mold of any shape, while more than one of the techniques are used in forming efficiency quicker, accuracy is more high, thereby avoiding the shortcomings and deficiencies of the mold.

[0005]为了实现上述发明目的，本发明采用如下所述技术方案:一种砂型复合成形方法，其特征在于，该方法包括如下步骤: [0005] In order to achieve the above object, the present invention adopts the following technical scheme: one method of forming a composite of sand, characterized in that the method comprises the steps of:

[0006] —种砂型复合成形方法，其特征在于，该方法包括如下步骤: [0006] - kind of sand composite molding method, characterized in that the method comprises the steps of:

[0007] a)根据三维铸型模型的结构特点，对模型按水平方向进行分层设计； [0007] a) According to the structural characteristics of the three-dimensional model of the mold, the model horizontally stratified design;

[0008] b)根据每层的铸型结构复杂特点，选择合适的加工方式，当铸型厚重体积占有量大，选用数控切削的方式成形；当铸型含有复杂的内部型腔结构，选用离散堆积成形方式进行成形； [0008] b) According to the characteristics of each mold complex structure, select the appropriate processing methods, when casting heavy volume occupy a large amount of numerical control cutting mode selection forming; when the mold cavity containing a complex internal structure, using discrete forming a bulk molding manner;

[0009] c)铸型由厚重的底部区域层由数控切削的形式开始，直至下部层铣削完成； [0009] c) cast by the thick layer starting from the bottom region in the form of numerical control cutting, milling until the lower layer is completed;

[0010] d)将整个下部区域铺设粉料整平，开始上部层的离散堆积成形，直至上部层堆积完成; [0010] d) the laying of the entire lower region of the powder leveling, began forming an upper layer of discrete accumulation, until the completion of an upper layer stacked;

[0011] e)最后清理未粘结的砂，完成整个铸型的整体制造。 [0011] e) final cleanup unbonded sand, complete the overall manufacturing the entire mold.

[0012]所述的离散堆积成形包括选择性激光烧结成形和树脂喷射喷射成形。 [0012] The discrete bulk molding including selective laser sintering resin injection molding and injection molding.

[0013]所述的下部层可以包含多层简单模块层，每层均为数控切削成形，后期人工组装成为一体。 [0013] The lower layer may comprise a simple multilayer module layers each are formed CNC machining, manual assembly late become one.

[0014] 附图说明: [0014] Brief description:

[0015]图1示意性示出了本发明的一种砂型复合成形方法的流程图 [0015] FIG. 1 schematically shows a flow chart of a sand mold of the present invention, a method of forming a composite

[0016]图2示意性示出了本发明的叶轮结构铸件 [0016] FIG. 2 schematically shows the structure of the impeller castings of the present invention

[0017]图3示意性示出了叶轮铸型复合成形方法 [0017] FIG. 3 schematically shows a method of forming a composite impeller mold

[0018] 附图标记 [0018] Reference numeral

[0019] I叶轮上模2叶轮下模2-1上层模块2-2下层模块 [0019] I impeller impeller lower mold die 2 2-1 2-2 lower level modules module

[0020]具体实施方式: [0020] DETAILED DESCRIPTION:

[0021 ]为了更清楚的表达出本发明一种砂型复合成形方法及特点，以下列举一个铸型的制造方法。 [0021] In order to more clearly express the invention discloses a method for forming a composite of sand and features listed below a mold manufacturing method.

[0022]根据铸型的特点，将铸型分为上模I和下模2，其中，上模I结构简单，直接铸型切削即可快速成形，下模2结构中即含有复杂的叶轮结构模块有含有结构简单的厚壁结构，采用离散堆积原理成形，其成形过程时间较长;若采用数控切削过程则需要建立多个子模块进行加工后拼接，过程复杂，且时间也会增加。 [0022] According to the characteristics of the mold, the mold is divided into upper and lower die I die 2, wherein the upper mold I structure is simple, direct mold cutting to rapid prototyping, namely the lower mold 2 structure contains a complex structure of the impeller module has a simple structure containing thick-walled structure, forming discrete accumulation principle, the process of forming a longer time; if the use of CNC machining process you need to create multiple sub-module for processing after the splicing, the process is complicated and time will increase. 下模2结构非常适合用本发明所述的方法进行加工。 2 lower die structure is very suitable for the method according to the invention for processing.

[0023]其具体步骤如下:首先进行下层模块2-2的铸型切削，切削完成后将废砂清理干净，然后驱动离散堆积原理的铺粉机构进行粉末铺设，直至与切削成形的下层模块2-2的顶面平齐且整个铺粉面平整，采用喷头喷射树脂或激光烧结方式进行选择性成形上层模块2-1，直至整个下模2完成，然后清理未粘结的多余粉末，完成下模2铸型的制造。 [0023] The specific steps are as follows: firstly the lower mold cutting module 2-2, after completion of cutting waste sand to clean up, and then drive the accumulation of discrete principle of dusting powder bodies lay, until forming and cutting lower module 2 -2 flush top surface and the whole flat noodle shop, the use of resin injection nozzle or selective laser sintering manner forming the upper module 2-1 until the entire lower die 2 is completed, then clean the excess unbonded powder, completed under producing a mold die 2.

[0024]综上所述，本发明具有如下优点:本发明能够将数控切削和离散堆积有机的结合起来，对于复杂厚重的铸型能够快速精确地加工成型。 [0024] In summary, the present invention has the following advantages: The present invention is capable of CNC machining and bulk organic combination of discrete, complex heavy cast molding process can be quickly and accurately.

[0025]以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。 [0025] The foregoing is only preferred embodiments of the present invention but not to limit the invention to those skilled in the art, the present invention may have various changes and variations. 凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。 Any modification within the spirit and principles of the present invention, made, equivalent replacement, or improvement should be included within the scope of the present invention.