SU1214448A1 - Tool for machining fibrous composite materials - Google Patents

Description

one

The invention relates to mechanical engineering and can be applied for cutting holes in fibrous composite materials.

The aim of the invention is to improve the quality of processing.

The tool contains a hollow rotating cylindrical drill 1 and a rotary drill drill 2 placed inside it, which have cutting teeth 3 and 4, respectively, the inclination of the teeth of the drills has the opposite direction.

The tool works as follows.

The primary drill bit 1 is mounted in a holder — a hollow machine spindle (not shown) and rotates clockwise at a predetermined machining speed. Drill 2 is rotated by an additional drive (not shown) and rotates at the same speed in the opposite direction. Cutting teeth 3 and 4 simultaneously pierce

Editor M. Bandura Order 833/23

Compiled by E. Mikhailova

Tehred A.Ach Corrector S.Shekmar,

Circulation 640 Dodpisnoe VNII1Sh State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Propulsion, Propulsion St., 4

14448.

in the material being processed. At the same time, the drills are fed for plunging into the material being processed and the tool processes the hole 5 in it. The simultaneous operation of two drills with multidirectional cutting teeth prevents the fibers from being pulled out of the die, i.e. from the binder, since the cutting forces are directed

19in opposite sides.

At the same time, the cutting teeth 4 of the drill 2 not only cut the fibers of the material, but in the process of work, keep the fibers from breaking out by means of the teeth of the drill 3 with a rotating teeth 1 from the cutting.

When installing the drill bit 2 inside the drill bit 1 between the cutting edges of the teeth 4 and 3, respectively, it is necessary to ensure a constant clearance

20dl of one machining diameter, for which, as the tool wears out, moving the drill 2 relative to the drill bit t provides the required gap,

Claims (1)

TOOL FOR PROCESSING FIBEROUS COMPOSITE MATERIALS BWW, containing outer and inner cylindrical drills concentrically mounted in the holder with cutting parts, characterized in that, in order to improve the quality of processing, the drills are mounted in the holder for rotation in opposite directions, and cutting; parts of both drills are made in the form of inclined cutting teeth, and the inclination of the teeth of the inner drill is opposite to the inclination of the teeth of the outer drill.