SU389889A1 - METHOD OF MAKING SHEETS - Google Patents

Description

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The invention relates to the field of machining on turning, milling and grinding machines.

A known method of manufacturing blades according to ed. St. No. 229168.

For group manufacturing of blades with a variable profile along the pen, a method is proposed by which the annular blank is processed by volumetric copying of its outer and inner sides, moreover, in the case of using a volumetric copier, the latter contains as many blade profiles as the end surface of the blank ring contains.

To smoothly change the cutting angles, the master cam profile contains at least two blade profiles with locks facing each other}. The ring can be cut into finished blades after finishing.

FIG. 1 shows the arrangement of the blades on the ring blank; in fig. 2 shows a variant of the arrangement of the blades on the workpiece with locks facing each other; in fig. 3 is a diagram of a device implementing the proposed method.

The axes / blades 2 are positioned relative to the axis 3 of the annular billet 4 so that the shelves 5 of the blades are perpendicular to the axis 3 of the billet.

This placement allows you to easily handle the root areas together with the pen profile. On the workpiece, you can perform shoulder 6, serving as

to increase its rigidity, and technological bases for securing the workpiece. In order to reduce fluctuations in the magnitude of the cutting angles and pressure during the reproduction of a complex profile, the lines of the matched edges of the blades are combined. In this case, blades with highly twisted profiles are stirred when designing a master copy with locks facing each other, and for some forms of blades for this purpose, adjacent blades are positioned with the back and trough in opposite directions.

The ring blanks 4 are mounted in the cams 7 of the chuck 8 rotating pliers, on which the copier is also mounted.

The copy movements of the W probe are transmitted to the cutter 11.

After pre-shaping the profiles of the blades by turning or milling, they are rolled around completely, for example, polished, strengthened, polished, after which the complex body obtained by volumetric copying is cut into finished parts. After this, the edges of the pen are modified. Moreover, mechanical processing of the billet of the ring is carried out on its outer and inner surfaces. After preliminary shaping the profiles of the blades on the ring billet on one side, for example, on the side, this side is filled with a low-melting Wood alloy to increase the rigidity of the blank, then reproduce the profiles on the opposite side. to the side. To improve processing accuracy, this technique can be applied twice. To ensure balancing of impeller rotors of the CCD due to a corresponding reduction in the scatter of the parameters of the blades by one step, the blades are made from one ring blank. The workpiece can be processed simultaneously from both sides, which leads to increased productivity. The subject of the invention 1. Method of manufacturing blades according to ed. St. No. 229168, characterized in that, for the purpose of group preparation of blades with a variable profile along the feather, the annular billet is processed by volumetric copying of its outer and inner sides, and, in the case of using a volumetric copier, the latter contains as many blade profiles as their frontal ring surface of the workpiece. 2. A method according to claim 1, characterized in that, in order to smoothly change the cutting angles, the profile of the master copy contains at least the profiles of two blades with locks facing each other. 3. A method according to claim 1, characterized in that the ring is cut into finished blades after finishing it.

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