SU994101A1 - Method of multiple forming of vanes - Google Patents

Description

(i) METHOD FOR MULTIPLE STAMPING OF BLADES

. The invention relates to the processing of pressure pipes and can be used in the stamping of small blades and other parts with thin sheets. . There is a known method of multi-piece noBtot strain of small forgings, enclosing in the simultaneous determination of several blanks simultaneously tl 1 However, it is almost impossible to make forgings with thin blades, such as blades, using a metal flow between individual forgings in a known manner. The known method of multi-explosive and blades of blades, which is carried out under isothermal conditions, includes two C2 transitions}. This method provides an increase in the productivity of the process and the utilization of the metal. The disadvantages of the method are the low accuracy of the forgings obtained and the low durability of the die tool, which is caused by the difficult flow of the metal between the forgings and high specific forces — deformation. The aim of the invention is to improve the accuracy of the forgings obtained and increase the durability of dies. This goal is achieved by the fact that in case of multi-piece punching of blades in a manner that includes at least two transitions, before the subsequent transition, the dribbles obtained at the previous transition are removed in places of difficult metal flow. Thus, at the subsequent transition of multi-piece stamping, the metal flow in the burr is facilitated, the load on the die is reduced and, accordingly, its durability is increased, and also forgings with a thin web are obtained before the group forging is separated. On {{ig. 1 depicts a group forging after a previous 3U9

Multiple stamping stroke; in Fig. 2, the "same group forging after removal of a flush in places of obstructed metal flow, prepared for the subsequent transition

multi piece stamping.

An example of the method. Lrovozh mnogostuchtma stamping of small blades made of heat-resistant alloy EP 718. The number of blades in the group forging is 20. Both transitions of multi-piece stamping were carried out on an electric screw press with a force of 16 MN. After the first transition of multi-piece forgings at one batch of forgings, burr was removed on a part of the contour in the places of difficult flow of metal, the second batch of strain was taken at the second transition without first removing it. A similar setting of the press and dies thickness of the blade for the forgings of the first group was 1 mm, the second - 2.5 mm.

The use of the invention significantly improves the accuracy

-h

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the products obtained, as well as the resistance

stamps.

Claims (3)

1.Bryukhanov A.N., Kebelsky A.V. Gor punching.- Designing and the calculation of staff. Mashgiz, 1932, p. Y2-93. 2. Figlin S. 3., Boytsov V.V., Kalpin Yu.G., Kaplin Yu.I. Isothermal deformation of metals. M., Mashinostroenie, 1U7b, p. 151-15. id W ffi And a / I - A n 0 will return o IG