SU1563852A1 - Method of working two opposite holes - Google Patents

Abstract

The invention relates to metal cutting and can be used when drilling holes with an inclined entrance. The aim of the invention is to increase the durability of the drills by stabilizing the feed during the plunging process when machining holes with an inclined entrance. When the drill 1 interacts with the inclined surface of the part 3 under the action of the torque, the drill 1 lengthens. The main cutting edges of the drill 2 at this moment do not interact with the part 4. Due to the perpendicular arrangement of the main cutting edges of the drill 1 relative to the main cutting edges of the drill 2 and due to the possibility of axial movement of the drills 1 and 2 together with the spindle assembly 5, the axial movement of the drills occurs 1 and 2 to the side of the drill that does not interact with the part. When both drills are rotated through 90 °, drill 2 is elongated due to its interaction with part 4 and both drills move in the opposite direction. Due to this mutual movement of the drills, the tool feeding is stabilized and their durability is increased. 3 il.

Description

The invention relates to metal cutting and can be used when drilling holes with an inclined entrance.

The purpose of the invention is to increase the durability of drills by stabilizing the feed during the plunge process when machining holes with an inclined entrance.

FIG. 1 shows a device for implementing the inventive method, a general view of FIG. 2 is a view A of FIG. 1 in FIG. 3 is a view of B in FIG.

A device for carrying out the proposed method comprises coaxially arranged drills 1 and 2, intended for machining parts 3 and 4 and fixed in spindle unit 5, which is mounted with the possibility of free axial movement. Drills 1 and 2 are rotated by means of an actuator (not shown). Parts 3 and 4 mounted on tables 6 and 7 are progressively moved by means of a drive (not shown).

The method is carried out as follows.

Before machining, the drills 1 and 2 are set so that their main cutting edges are perpendicular to one another. In a counter-translational movement of the parts 3 and 4, the drills 1 and 2 interact with their main cutting edges with the inclined surfaces of the parts. When the main cutting edge of the drill bit 1 cuts into the inclined surface of the part 3, the drill bit 1 under the action of the torque moment lengthens on the beam as at the same moment

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the main cutting edges of the drill 2 due to the perpendicular placement relative to the main cutting edges of the drill 1 do not interact with the machined surface of the part 4 and due to the fact that the drills 1 and 2 have the possibility of axial movement together with the spindle unit 5, the axial movement of the drill 1 occurs and 2 in the direction of the drill that does not interact with the part.

When the drill bit 1 leaves the engagement with the part 3, the main cutting edge of the drill bit 2 cuts into the inclined surface of the workpiece 4 and under the effect of the torque, the drill bit 2 lengthens by an amount. Both drills move in the opposite direction. Due to this mutual movement of the drills, the tool feeding is stabilized and its durability is increased.

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25 Formula of invention

A method of processing two opposed openings of two coaxially arranged drills, in which relative rotational and translational movements are reported to tools and parts, which are different from the fact that, in order to increase the durability of drills by stabilizing the feed during the incision process when machining openings with an inclined entrance, The drills are installed with the possibility of axial movement and force closure, while placing their main cutting edges perpendicular to one another.

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Compiled 10. Yudin Editor A. Revin Tehred M. Khodanich Proofreader I. Musk

Order- 1122 Circulation 703Subscription

VNIIPI State Committee for Inventions and Discoveries of the Third SCST of the USSR 113035, Moscow, Zh-35, Raushsk naB., 4 / S

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Claims (1)

Claim A method for processing two opposed holes with two coaxially located drills, in which the tools and parts are informed of relative rotational and translational movements, characterized in that, in order to increase the resistance of the drill due to stabilization of the feed during insertion during processing of holes with an inclined entrance, the drills are installed with the possibility of axial movement and power circuit, while placing their main cutting edges perpendicular to one another. Vsd s