SU812443A1

SU812443A1 - Rotation multiflute drill

Info

Publication number: SU812443A1
Application number: SU792784760A
Authority: SU
Inventors: Борис Владимирович Лупкин; Юрий Дмитриевич Авдошко; Игорь Васильевич Ведмеденко; Борис Сергеевич Белоконь
Original assignee: Предприятие П/Я А-7332
Priority date: 1979-06-26
Filing date: 1979-06-26
Publication date: 1981-03-15

Description

Изобретение относится к металлообработке.The invention relates to metalworking.

Известен ротационный зенкер для чистовой обработки отверстий, в котором режущий элемент выполнен в форме диска со сплошной режущей кромкой и расположен ₅наклонно к оси вращения зенкера [1] .Known rotary countersink for finishing holes, in which the cutting element is made in the form of a disk with a solid cutting edge and is ₅ inclined to the axis of rotation of the countersink [1].

Недостатками известной конструкции зенкера являются низкая размерная стойкость, большая энергоемкость процесса резания и низкая производительность.The disadvantages of the known design of the countersink are low dimensional stability, high energy consumption of the cutting process and low productivity.

Цель изобретения — повышение произ- 10 водительности и качества обрабатываемой поверхности.The purpose of the invention is to increase the productivity and quality of the treated surface.

Поставленная цель достигается тем, что дисковый резец выполнен с двумя противо положно направленными круговыми режущими кромками и установлен с разворотом на угол ± Д относительно оси, проходящей через две противоположные режущие кромки и ось вращения дискового резца и лежащей в одной плоскости с осью вращения ротационного зенкера. 20This goal is achieved in that the disk cutter is made with two oppositely directed circular cutting edges and is mounted with a rotation of ± D relative to the axis passing through two opposite cutting edges and the axis of rotation of the disk cutter and lying in the same plane with the axis of rotation of the rotary drill. 20

На фиг. 1 схематически изображен предлагаемый ротационный зенкер; на фиг. 2 — разрез А—А на фиг. 1; на фиг. 3 — разрез Б—Б на фиг. 1:In FIG. 1 schematically shows the proposed rotary countersink; in FIG. 2 — section A — A in FIG. 1; in FIG. 3 - section B — B in FIG. 1:

Ротационный зенкер содержит цилиндрический корпус 1, в сквозном пазу с плоско-параллельными плоскостями которого помещен дисковый резец 2. Паз ориентирован в пространстве, под углом ώ =30-45° к вертикальной оси инструмента (в плоскости чертежа) и под углом расположенным в перпендикулярной плоскости относительно плоскости чертежа.The rotary countersink comprises a cylindrical body 1, in which a circular cutter 2 is placed in a through groove with plane-parallel planes 2. The groove is oriented in space, at an angle ώ = 30-45 ° to the vertical axis of the tool (in the drawing plane) and at an angle located in the perpendicular plane relative to the plane of the drawing.

Угол Д должен быть не менее 15°, так как этот угол обеспечивает условие, когда в контакте с обрабатываемой поверхностью находятся диагонально расположенные противолежащие режущие кромки резца.The angle D should be at least 15 °, since this angle provides the condition when diagonally located opposite cutting edges of the cutter are in contact with the surface to be treated.

Дисковый резец 2 смонтирован на подшипниках 3 скольжения и установлен на оси 4. Дисковый резец 2 представляет собой плоскую шайбу, на периферии которой выполнено по всему периметру конусное углубление, боковые поверхности которого образуют заднюю поверхность с углом X. На верхней и нижней плоскостях шайбы выполнены кольцевые конусные канавки, образующие в поперечном сечении переднюю поверхность с угломThe disk cutter 2 is mounted on sliding bearings 3 and mounted on the axis 4. The disk cutter 2 is a flat washer, on the periphery of which a conical recess is made around the perimeter, the lateral surfaces of which form a rear surface with an angle X. On the upper and lower planes of the washer, annular conical grooves forming in cross section a front surface with an angle

В процессе работы зенкеру сообщается вращательное и поступательное движения.In the process, the rotary and translational motion is communicated to the drill.

Так как дисковый резец 2 установлен в корпусе 1 с разворотом на угол ±Л = 15—30° вокруг оси С—С, то обе режущие кромки вступают в контакт с материалом обрабатываемого отверстия, снимая припуск на обработку, при этом составляющие сил резания, диаметрально направленные друг к другу, способствуют устойчивому самовращению дискового резца и устраняют радиальное биение ротационного зенкера. Наличие кривизны режущей кромки дискового резца повышает качество обработанных отверстий.Since the disk cutter 2 is installed in the housing 1 with a rotation through an angle of ± L = 15-30 ° around the C – C axis, both cutting edges come into contact with the material of the hole being machined, removing the machining allowance, while the components of the cutting forces are diametrically directed towards each other, contribute to the stable self-rotation of the disk cutter and eliminate the radial runout of the rotary drill. The presence of curvature of the cutting edge of the disk cutter improves the quality of the machined holes.

Claims

The invention relates to metal working. A rotary countersink for finishing holes is known, in which the cutting element is made in the form of a dieque with a solid cutting edge and located obliquely to the axis of rotation of the countersink 1. The disadvantages of the countersink's known design are low dimensional resistance, greater cutting power and low productivity. The purpose of the invention is to increase the productivity and quality of the treated surface. The goal is achieved by the fact that the disk cutter is made with two oppositely directed circumferential cutting edges and is installed with a turn at an angle tD about the axis passing through two opposite cutting edges and the axis of rotation of the disk cutter and lying in the same plane with the axis of rotation of the rotary countersink. FIG. 1 shows schematically the proposed rotary countersink; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows the BB rejection in FIG. 1 The rotation countersink contains a cylindrical body 1, in the through-groove with plane-parallel planes of which a disk cutter is placed.

2. The groove is oriented in space, at an angle i) 30–45 ° to the vertical axis of the tool (in the plane of the drawing) and at an angle D located in the perpendicular plane relative to the plane of the drawing. The angle J must be at least 15 °, since this angle ensures that diagonally located opposite cutting edges of the tool are in contact with the surface to be treated. The disk cutter 2 is mounted on slide bearings 3 and mounted on axis 4. The disk cutter 2 is a flat face, on the periphery of which there is a tapered groove along its entire perimeter, the lateral surfaces of which form the back surface with angle L. annular conical grooves are formed, which form a front surface with an angle () in cross section. During operation, rotational and translational movements are reported to the countersink. Since the disk cutter 2 is installed in the housing 1 with turns at an angle of ± D 15-30 ° around the C – C axis, both cutting edges come into contact with the hole material o6pa6k, removing the machining allowance, and the components of the cutting forces are diametrically directed towards each other, contribute to the stable self-rotation of the disk cutter and eliminate the radial beating of the rotary core drill. The presence of the curvature of the cutting edge of the disk cutter increases the quality of the treated holes. tiy. Claims of the invention: Rotary countersink, comprising a housing with a disk cutter mounted on an axis, the axis of rotation of which is angled to the axis of rotation of the countersink, characterized in that, in order to increase the productivity and quality of the surface to be treated, the disk cutter is made with two oppositely parallel circular cutting edges installed with a turn at an angle H about the axis passing through two opposite cutting edges and the axis of rotation of the disk cutter and JJ in the same plane with the axis of rotation of the mouth ation countersink. Sources of information taken into account in the examination 1. Konovalov EG and others. Progressive schemes of rotational cutting of metals. Minsk, “Science and Technology, 1972, p. 201, fig. 84