Manufacturing method for pedestal used for blade measuring

Abstract

The invention discloses a manufacturing method for a pedestal used for blade measuring, and the pedestal is a rectangular block which is cast from a low-melting-point alloy, and surrounds tenon teeth.The manufacturing method comprises the following steps: step A, providing casting equipment and fixing blades; step B, pouring the low-melting-point alloy into the casting cavity, and taking out theblades with the rectangular block when the low-melting-point alloy is quickly condensed; and step C, providing cutting equipment, utilizing an electric heating wire to cut an alloy part which coats alocking sheet slot, thereby accomplishing manufacturing of the rectangular block. According to the manufacturing method for the pedestal used for blade measuring provided by the invention, the standard pedestal is manufactured, so that the measuring work-period of the blades can be greatly shortened; and meanwhile, production cost and maintenance cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of aero-engine production, in particular to a method for preparing a base for measuring blade parts during the production process of turbine blades of small and medium-sized aero-engines. Background technique [0002] In the manufacturing process of aero-engines, the turbine blades can be cast and formed by precision casting of individual blade parts, and then the individual blade parts are assembled on the edge plate to form the whole turbine. [0003] Figure 1a It is a schematic diagram of a three-dimensional structure principle of a first-stage turbine blade; Figure 1b It is a schematic diagram of a three-dimensional structure principle of a two-stage turbine blade; Figure 1c It is a schematic diagram of the three-dimensional structure principle of a free turbine blade; Figure 2a for right Figure 1a Schematic diagram of the principle of blade size measurement for the first-stage turbine blade; Fi...

AI Technical Summary

Problems solved by technology

[0012] The above-mentioned existing measurement methods are cumbersome and complicated. For example, when measuring the airfoil shape, use a vise to clamp the rolling rods 2 during the clamping process, and the level of the two rolling rods 2 will eventually affect the measured airfoil shape. The accuracy of the data, so the operator must have rich experience to ensure the efficiency of the process of clamping the roller bar 2; and for the special measuring tool for measuring the edge plate 12 and the lock piece groove 131, such as Figure 2b and 2c As shown, if the gap between the mounting grooves is too large, it will be difficult to ensure the consistent state of the blades after clamping. If the gap is too small, it will be difficult to install the blades. Therefore, it is difficult to manufacture the mounting grooves and the accuracy is difficult to guarantee.

And in order to avoid damage to the blade, usually, the hardness of the material used to manufacture the special measuring tool (especially the position of the installation groove) will be less than the hardness of the material of the blade 1, so it is also easy to use during use. Causes wear of the mounting groove, which causes dimensional changes

[0013] In the measurement process, since each measurement part requires special tooling, multiple sets of special tooling are required for each blade, resulting in high production costs

In addition, the large number of tooling will also lead to difficult management, and the difficulty of tooling maintenance will increase

And because the whole process is manual operation, the clamping measurement process of each size requires the operator to have more skilled operation skills

[0014] Existing measurement process operating inefficiently

For each batch of at least hundreds of precision castings of various blades in actual production, since each blade needs to be measured, the measurement process takes a long time, which will become one of the important factors that delay the entire production cycle

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