ー种砂型复合成形方法ー kinds of sand compound forming method

技术领域 Technical Field

[0001] 本发明涉及一种铸造技术领域，更具体地，涉及ー种铸型的快速制造方法。 [0001] The present invention relates to a technical field of casting, more particularly, relates to a method for producing quick ー mold species.

背景技术 Background

[0002] 为提高单件、小批量铸型的质量，降低生产成本，減少生产周期，离散堆积成形原理及直接数控切削成形原理的鋳型制造技术应运而生。 [0002] In order to improve a single piece, small batch casting quality, reduce production costs, reduce production cycle, discrete accumulation forming principle and the principle of direct numerical control cutting forming 鋳 Manufacturing technology is introduced. 这两种技术最具典型代表的是激光烧结成形技术和无模铸造成形技术，都可以完全不用模具，直接制造出各种形状的铸件砂型。 Both technologies represent the most typical laser sintering technology and no cause-shaped molding technology, can be completely without mold, sand casting directly create various shapes.

[0003] 两种技术对新产品试制提供了便捷的途径，但两种技术都存在各自的优缺点，离散堆积成形具有任意形状均可成形，但层层铺料浪费时间，尤其在涉及厚重铸型时，其加工时间长，成形质量差等缺点；铸型数控切削成形具有快速、高精度的成形优势，但对于具有内行腔结构的鋳型需拆分加工，其时间和质量都受到很大的影响。 [0003] The two technologies for new products development provides a convenient way, but there are two technologies advantages and disadvantages of forming a discrete accumulation of any shape can be formed, but the layers of shop materials waste of time, especially involving heavy cast type, the processing time is long, forming defects and poor quality; CNC machining mold forming a fast, high-precision shaping advantage, but need to have experts for 鋳 type cavity split processing, its time and quality have been great affected.

发明内容 DISCLOSURE

[0004] 为了克服现有技术的缺点，本发明的目的在于提供ー种砂型复合成形方法，能快速加工任意形状的鋳型，同时比都用其中一种技术成形在效率上更快，精度更高，进而避免了鋳型的缺陷和不足。 [0004] In order to overcome the disadvantages of the prior art, an object of the present invention to provide a method for forming a composite ー kinds of sand can be quickly processed 鋳 type of arbitrary shape, but are formed by one of the technology than on efficiency and faster, more accurate and thus avoid the Zhu-type defects and deficiencies.

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

ー种砂型复合成形方法，其特征在于，该方法包括如下步骤:ー kinds of sand composite forming method, wherein the method comprises the steps of:

a)根据三维鋳型模型的结构特点，对模型按水平方向进行分层设计； a) According to the structural characteristics of the three-dimensional 鋳 type model, the model horizontally stratified design;

b)根据每层的鋳型结构复杂特点，选择合适的加工方式，当鋳型厚重体积占有量大，选用数控切削的方式成形；当鋳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； b) according to each of Zhu complex structure characteristics, select the appropriate processing methods, when Zhu type heavy volume occupy a large amount of numerical control cutting mode selection forming; when Zhu type contain complex internal cavity structure, using a discrete way of forming a bulk molding;

c)鋳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； c) 鋳 type starting from the bottom region of the thick layer made of CNC machining in the form of lower layer until the completion of milling;

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 d) The entire lower area of ​​the laying of powder leveling, began stacking the upper layer, forming discrete, until the upper layer stacking End

成； A;

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

[0006] 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。 Discrete [0006] The bulk molding including selective laser sintering resin injection molding and injection molding.

[0007] 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。 Lower layer [0007] The multiple layers may contain simple module layers, each are cutting CNC forming, the latter part of the assembly to become one.

[0008] 附图说明: [0008] Brief description:

图1示意性示出了本发明的ー种砂型复合成形方法的流程图图2示意性示出了本发明的叶轮结构铸件图3示意性示出了叶轮铸型复合成形方法附图标记I叶轮上模2叶轮下模2-1上层模块2-2下层模块具体实施方式: Figure 1 schematically illustrates a flowchart of FIG ー kinds of sand molding method of the present invention is a composite of 2 schematically shows the structure of the impeller castings view of the invention 3 schematically illustrates a method for forming a composite impeller mold numerals I impeller impeller on the lower mold die 2 2-1 2-2 lower level modules module specific embodiments:

为了更清楚的表达出本发明ー种砂型复合成形方法及特点，以下列举ー个鋳型的制造方法。 In order to more clearly express a 鋳 type of manufacturing process of the present invention ー kinds of sand composite molding method and characteristics listed below ー.

[0009] 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，直接鋳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，且时间也会増加。 [0009] According to the characteristics of the mold, the mold is divided into upper and lower die I die 2, wherein the upper die I structure is simple, direct Zhu type cut to rapid prototyping, namely the structure of the lower mold 2 contains a complex structure of the impeller modules have a simple structure containing thick-walled structure, forming discrete accumulation principle, the forming process is a long time; the use of CNC machining process you need to create multiple sub-module for processing after splicing, the process is complicated and also to increase in time. 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.

[0010] 其具体步骤如下:首先进行下层模块2-2的鋳型切削，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 [0010] The specific steps are as follows: firstly the lower module 2-2 鋳 type cutting, cutting waste after completion of clean sand, and then drive a discrete accumulation principle of dusting powder bodies lay, until forming and cutting lower Module 2 - flush with the top surface 2 and the whole flat noodle shop, using sprinklers spray resin or selective laser sintering manner forming the upper module

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鋳型的制造。 2-1, until the entire lower mold 2 is completed, then clean the excess unbonded powder, complete the next 2 Zhu type mold manufacturing.

[0011] 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，对于复杂厚重的鋳型能够快速精确地加工成型。 [0011] In summary, the present invention has the following advantages: The invention can be CNC machining and discrete accumulation of organic combination, for complex heavy Zhu type capable of fast and accurate molding process.

[0012] 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。 [0012] The above description is only a preferred embodiment of the present invention but not to limit the invention, for those skilled in the art, the present invention can have various modifications and changes. 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.