SU1491704A1 - Method of cutting material - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used in mechanical engineering for cutting materials, followed by their separation into dimensional blanks. The purpose of the invention is to improve the quality of the products and increase reliability. In the process of cutting, the wedge knife 1 is inserted into the product 2 and rolled around it. In this case, the introduction of the knife is carried out along the line of contact with the angle Α = (0.25 ... 0.35) β, where β is the transverse angle of contact of the knife with the material. At the same time, there is practically no burr on the edges, i.e. at the beginning and end of the cut. 3 il.

Description

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The invention relates to the processing of metals by pressure and can be used in mechanical engineering for cutting material, followed by its separation into dimensional workpieces.

The purpose of the invention is to improve the quality of the products and increase reliability.

FIG. Figure 1 shows the key for inserting a wedge knife into the material; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows the node I in FIG. 2

The direction of movement of the wedge knife 1 and the incised product 2, for example, rings made of bearing steel, is shown by arrows in FIG. I. A knife 1 with a wedge angle p rolling over product 2 is inserted into the material. The rolling radius R, being pressed 1, is selected from the condition of the formation of the contact angle a, which is equal for the flat surface a (() .25 ... 0.35) p. From FIG. 1 follow- Blowing „,

and arccos -,

where R is the rolling radius; h - depth of cut

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0

five

0

The ratio found for a is determined by the scheme of forces acting on them in the material in the zone of its notch deformation.

When a wedge is inserted, the material is squeezed in the direction of arrows a, b, c.

Fulfillment of the condition (0.25 ... 0.35) fi minimizes extrusion in the direction c, which means practically no burr at the edges, i.e. at the beginning and end of the cut. The resulting localized heaving of the material, mainly in the a direction, is removed during subsequent processing without the introduction of an additional operation.

Claims (1)

Invention Formula The method of notching the material by introducing a wedge knife into the material, characterized in that, in order to improve reliability (0.25 ... 0.35) p, where the transverse angle of contact of the knife with the material. impersonation Sh.