Turbine and preparation method for turbine wax molds

Abstract

The invention discloses a preparation method for turbine wax molds. Cylindrical cuttable wax blanks are fixed on a machine tool for cutting to obtain turbine wax mold blanks; the turbine wax mold blanks comprise positioning tables positioned at one ends of the turbine wax mold blanks, remained cutting parts positioned at the middle parts of the turbine wax mold blanks, and one parts of hubs positioned at the other ends of the turbine wax mold blanks; the positioning tables of the turbine wax mold blanks are connected with fixtures; the fixtures are fixed on a fix-axle machining center; the remained cutting parts on the turbine wax mold blanks are milled through the five-axle machining center to form twisted blades, the other parts of hubs and baseplates; the blades are uniformly distributed in the peripheral directions of the other parts of the hubs; the baseplates are positioned between one ends of the blades and the positioning tables; and the positioning tables are cut to form connecting parts for wheel shafts. The preparation method has the advantages of shortening of the production period and reduction of the production difficulty of the turbine wax molds.

Description

technical field [0001] The invention relates to a turbine and a method for preparing a turbine wax model. Background technique [0002] A turbine, a fan in a car or aircraft engine, improves engine performance by blowing fuel vapor into the engine using exhaust gas. Turbine is a rotary power machine that converts the energy of flowing working medium into mechanical work. It belongs to the main parts of aero-engines, gas turbines and steam engines. It works in high-temperature and high-speed environments and requires high-temperature resistance and high mechanical properties. The material is precision cast. The precision casting of the turbine is actually investment casting, which first shapes the shape of the turbine through wax, and then casts the blank of the turbine through the casting process. [0003] The traditional and mainstream turbo paraffin molding is mold molding, which uses molds to manufacture high-precision and high-gloss wax patterns. Its main structure inc...

AI Technical Summary

Problems solved by technology

However, the method of precision casting wax mold blades has the same problem as the traditional method of forming wax molds, that is, it needs to be realized with the help of complex mechanical structures, and the cycle is long

[0005] With the advancement of technology, some rapid prototyping and 3D printing technologies have appeared on the market. The two are actually similar in principle; rapid prototyping technology is based on digital model files, using powdered metal or plastic and other bondable materials. The technology of constructing objects by layer-by-layer printing; due to layer-by-layer printing, there will be splicing marks between layers, resulting in poor surface finish after printing, and the cost of 3D printing is relatively high, which is not suitable for 3D printing. Mass production, limited to the sample delivery stage

[0006] With the development of industry, the turbine tends to be miniaturized and the blades are complicated. The traditional casting method cannot meet the needs of product development and design in the early stage. One is that the manufacturing cycle of the mold is longer and the cost is higher, and the other is that the turbine blades are complicated to a certain extent. To a certain extent, the design of the mold is quite difficult, the problem of demoulding interference is more serious, it is easy to produce wax-type deformation, the casted finished product has deformation, poor surface quality and large unbalanced products in the later stage; 3D printing technology and rapid prototyping are relatively Compared with the traditional mold manufacturing, the wax-type manufacturing speed is fast, and there is no problem of demoulding interference, but the cost is high, the surface quality is poor, and the surface treatment of the casting is difficult in the later stage, which affects the unbalance of the rotor

[0007] In addition, in the prior art, there is a method of five-axis machining to mill the nickel-based alloy bar to obtain a twisted impeller (the control program of the tool path is preset in the controller of the five-axis machine tool ), however, nickel-based alloys are difficult-to-machine materials. Five-axis machining and milling of impellers is not only very difficult but also the surface quality varies greatly, making it impossible to use

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