SU1719234A1 - Milling cutter - Google Patents

Abstract

The invention relates to the processing of materials by cutting. The goal is to increase the productivity and quality of processing wood and foamed polymeric materials. For this, the cutting elements are provided with in-plane, perpendicular axis of rotation of the cutter, in front of the main cutting edges in the direction of rotation of the cutter additional cutting edges. When crossing the main cutting edges, these edges form a vertex and are inclined relative to the tangent to the circle passing through these vertices at an angle of 10 ... 80 °. Additional edges are made with front angles of 50 ... 85 & and back angles 0 ... 100, the angles of inclination of the main cutting edges are made decreasing in the direction from the top from 85 to 60 °. 3 il.

Description

The invention relates to the processing of materials by cutting and can be used in industry for high-speed machining of parts.

The aim of the invention is to increase the productivity and quality of processing wood and foamed polymeric materials.

FIG. 1 shows a cutter, a general view; in fig. 2 is a view along arrow A in FIG. one; in fig. 3 shows a section BB in FIG. 2

The milling cutter contains cutting elements 1 mounted on the body-disk 2, -The angles of inclination of the main cutting edges 3 of the elements 1 are made increasing in the direction towards the vertices 4, formed at the intersection with the additional cutting edges 5, from 60 to 85 °. The edges 5 are located in a plane perpendicular to the axis of rotation of the cutter, in front of the main cutting edges in the direction of rotation of the cutter. The edges 5 are inclined relative to the tangent to the circle passing through the vertices 4, at an angle of / 10 ... 80 °, and are made with front angles of 50 ... 85 ° and rear corners a. 0 ... 100.

The cutter works as follows. When the cutter is rotated in the direction indicated by the arrow in FIG. 1, and the supply of the material being processed into the contact enters an additional cutting edge 5. Due to the inclination angle D as well as the sharpening angles of the uia, the additional cutting edge 5 smoothly performs the cutting process in a plane perpendicular to the workpiece surface. Then, the main cutting edge 3, constituting the cylindrical working surface of the milling cutter, is carried out, carrying out the cutting process in an altered direction. Due to the fact that the auxiliary cutting edge 5 has an angle

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the inclination / in the plane perpendicular to the axis of rotation of the cutter, and the inclination angle w of the main cutting edge 3 at the top 4 has a maximum value, for example 85 °, the angle between the additional and main cutting edges is close to 180 °, which ensures a smooth change of the cutting direction, eliminates punch, which improves performance and processing quality.

During the operation of the main cutting edge, its angle of inclination is constantly reduced to 85-60 ° (see Fig. 2) depending on the angular position of the milling cutter, and therefore the amount of sliding of the cutting edge during the cutting process is reduced. A change in the inclination angle of the cutting edge introduces an additional movement-reversal of the cutting edge to the cutting process, depending on the angular position of the cutter, which increases productivity and improves the quality of machining of one cutting element and the cutter as a whole.

The maximum value of the angles of inclination of the main cutting edges at the starting points makes it possible to reduce dynamic force phenomena at the initial moment of operation, while eliminating the impact on the machining

material The presence of additional edges makes it possible to increase the smoothness of the cutting and reduce the vibration.

Claims (1)

The invention of a material cutter comprising a body with cutting elements, the main cutting edges of which are inclined to the axis of rotation of the cutter, is different because in order to improve the productivity and quality of processing wood and foamed polymeric materials, the cutting elements are provided with in the plane perpendicular to the axis of rotation of the cutter, in front of the main cutting edges in the direction of rotation of the cutter with additional cutting edges that form at the intersection with the main cutting edges E ka20 top and inclined relative to a tangent to a circle passing through the vertex at an angle of 10 ... 80 °. the additional edges are made with front angles of 50 ... 85 ° and rear angles of 25 mm 0 ... 100, and the angles of inclination of the main cutting edges are made increasing from 60 to 85 ° in the direction towards the vertices. J3 figure 1 In id 5-6 Fig.Z