A method for manufacturing a punching die for a compressor stator vane

Abstract

The invention discloses a method for manufacturing a punching die of a stator blade of a gas compressor. The method comprises the following steps that firstly, a female die body is manufactured, and the reference dimension of the lower molded surface of a male die body and the reference dimension of the upper molded surface of an ejection block are obtained; secondly, at least five points are selected on the boundary line of the tail end area of the upper molded surface at equal intervals to serve as datum points, and at least five points are selected on each of the two boundary lines of the middle area of the lower molded surface at equal intervals to serve as datum points; thirdly, the male die body is manufactured, and measurement is conducted according to the datum points on the two boundary lines in the middle areas of the lower molded surface; and finally, according to the reference dimension of the upper molded surface, the head end area is removed by 0.1 mm, the middle area is removed by 0-0.3 mm, the ejection block is manufactured according to the modified dimension, and measurement is conducted according to the datum points on the boundary line in the tail end area. According to the method for manufacturing the punching die of the stator blade of the gas compressor, die manufacturing precision and production efficiency are improved.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a manufacturing method of a punching die, in particular to a manufacturing method of a compressor stator vane punching die. Background technique [0002] figure 1 is a structural schematic diagram of a compressor stator blade, see figure 1 As shown, the compressor stator blade 1 has a thicker arc-shaped head end 11, a thinner tail end 12, a blade root 13 and a blade tip 14, and also has a blade back 101 and a The blade basin surface 102, the thinnest part of the tail end 12 is only 0.15 mm, and the blade root 13 is provided with two notches 131 . The compressor stator blade 1 is processed and manufactured by punching. figure 2 for manufacturing figure 1 The schematic diagram of the structure of the existing punching die for the compressor stator blade shown, image 3 for figure 2 The partial cross-sectional structure schematic diagram of the punching die shown, see Figure 2-3 As ...

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Problems solved by technology

[0003] Since the profile of the compressor stator blade 1 is complex and uneven in thickness, when the upper profile 240 of the top block 24 corresponding to the blade basin surface 102 and the convex mold 23 corresponding to the blade back surface 101 When there is a deviation in the matching of the lower surface 230, the material cannot be well bonded during the punching process, that is, the material cannot be well supported, and it is easy to cause uneven punching force, resulting in cutting Various defects such as surface tearing, cracks, sagging and flashing

[0004] In addition, when the matching gap w between the male die 23 and the female die 22 is too large (for example, greater than 0.04mm), it is also easy to cause tearing, cracks, and collapse of the cut surface due to the force of the material during punching. Various defects such as corners and flashes

[0005] The existing manufacturing method is to manufacture the punch 23, the die 22, and the top block 24 respectively according to the theoretical design dimensions, and then repair and adjust them during use. Therefore, it takes a long time for the whole set of molds to reach the optimum working condition. long process

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