SU984713A1

SU984713A1 - Drilling head

Info

Publication number: SU984713A1
Application number: SU803003506A
Authority: SU
Inventors: Аркадий Яковлевич Вирон; Владимир Николаевич Уманец
Priority date: 1980-11-10
Filing date: 1980-11-10
Publication date: 1982-12-30

Description

(54) СВЕРЛИЛЬНАЯ ГОЛОВКА(54) DRILLING HEAD

Изобретение огноситс к мегаллообрабогке и предназначено дл .использовани в сверлах глубокого сверлени отверстий больи.гого диаметра.The invention is flaky for megalore-machining and is intended for use in deep-hole drills of large diameter.

Известна сверлильна головка, содер- жащан корпус с отверсти ми дл отвода СОЖ из зоны обработки, направл ющие планки и установленные в продольных гнездах корпуса резцовые вставки с выотупом , поджатые нижней и-тыльной ба- ,д зовыми поверхност ми к опорным поверхност м гнезда прижимным винтом, взаимодействующим с наклонной поверхностью выступа вставки, расположенного во впадине гнезда 1.,5The known drilling head, a housing with openings for draining coolant from the treatment area, guiding strips and cutting inserts installed in the longitudinal slots of the housing with a votup pressed against the bottom and back of the back and dorsal surfaces to the bearing surfaces of the socket screw interacting with the inclined surface of the protrusion of the insert, located in the cavity of the socket 1., 5

Недостатком этой сверлильной голоьки вл етс нетехнологичность изготовлен НИН и недостаточна надежность крепл&ни вставок в корпусе.The disadvantage of this drill bit is the low-tech made by the NIN and the lack of reliability of the fastener & no inserts in the case.

Нетехнологичность изготовлени свер- 20 лильных головок обусловлена сложностью и большой трудоемкостью обеспечени Вааимной перпендикул рности торцовой и нижней опорных поверхностей гнезда корпуса.The low-tech manufacturing of drilling heads 20 is due to the complexity and great complexity of ensuring that the perpendicular end and bottom bearing surfaces of the housing slot are perpendicular.

Реально существующа взаимна перпендикул рность указанных поверхноотей в совокупности с перпендикул рностью тыльной и нижней базовыми поверхност ми резцовых вставок обуславливают недостаточную их жесткость креплени , что вл етс одной из причин возникновени вибраций при сверлении, сннжаю цих надежность работы сверлильной го ловки .The actually existing mutual perpendicularity of these surfaces, together with the perpendicularity of the back and bottom base surfaces of the tool inserts, cause their insufficient attachment rigidity, which is one of the reasons for the occurrence of vibrations when drilling and removing the reliability of the drilling head.

Цель изобретени - технологичность изготовлени и повышение надежности работы сверлильной головки.The purpose of the invention is the manufacturability and increase the reliability of the drilling head.

Поставленна цель достигаетс тем, что тыльна базова поверхность резцовых вставок вьшолнена расположенной к их нижней базовой поверхности под углом, меньпшм 90, и взаимодействует с выступом, образованным на торцовой опорной поверхности гнезда корпуса головки.The goal is achieved by the fact that the rear base surface of the tool inserts is located at an angle of less than 90 from the lower base surface and interacts with a protrusion formed on the end bearing surface of the head housing slot.

Claims

FIG. 1 shows a drill gojioBJcaj general view; in fig. 2 - the same, longitudinal section; in fig. 3 is a diagram of the fastening of the incisal insert. The drilling head consists of a housing 1 with openings 2 for draining coolant from the treatment area, guide rails 3 and cutting inserts 4 having a protrusion 5 on the lower base surface. Inserts are installed in the longitudinal slots of the housing, and their protrusions 5 are located in the depths of 6 of these sockets. The front surface 7 of the protrusions 5 is inclined to the lower base surface 8 of the cutting inserts and interacts with the clamping screw 9 screwed into the body 1. 9 is tucked to the protrusion 11, having on the end bearing surface of the socket body 1 of the drill head-. The fastening of the tool inserts is carried out as follows. In the longitudinal slots of the housing 1 mouth (cutting inserts 4 are poured, and their protrusions 5 are located in the depressions 6 of the slots. When the clamping screw 9 is screwed into the housing 1, its end enters into the depression 6 and acts on the inclined surface 7 of the cutting insert 4, shifting it to the stop with the back base surface 10 into the protrusion 11, fixed on the end support surface of the housing nest. Further screwing in causes the inclined surface 7 of the protrusion 5 to slide along the end of the screw and jointly with the rear The base surface 10, which interacts with the protrusion 11, self-sets the cutting insert 4 into the seat of the housing 1, pressing its lower base surface 8 tightly against the support surface, the socket. The optimum tilt angle oL of the rear reference surface 10 is determined from the condition of the total clockwise force moment the arrow when the tool insert touches the socket at the point Au and counterclockwise when it touches the point B. Approximately, without taking into account the effects of friction forces, the angle oL determines the ratio ii4qtio) ctg- (b. -tocie f btc where a is the length of the bottom surface of the housing nest; }) - projections onto the axis of the drilling head from the end of the bottom surface of the socket to the point of interaction of the screw with the protrusion of the insert; C is the projection of the distance between the points of interaction of the screw and the protrusion of the socket with the incisor insert on the axis of the ghost head; B is the height of the location of the protrusion of the socket from the axis of the clamping screw; l, - the angle between the lower base surface of the insert and the surface of the protrusion on it; ABOUT/. - the angle between the back and bottom base surfaces of the tool insert. Making the housing socket and the cutting insert increases the reliability of mounting the cutting inserts, as well as the manufacturability of the drilling head due to reduced accuracy requirements for the relative position of the base and support surfaces. Formula iso, brets A drilling head comprising a housing with openings for draining coolant from the treatment area, guide rails and cutting inserts with protrusion installed in the longitudinal slots of the housing and protruded by the lower and rear base surfaces to the bearing surface of the socket with a clamping screw that interacts with the inclined the surface of the protrusion of the insert located in the cavity of the socket, characterized in that, in order to increase the reliability of operation, the rear base surface of the tool inserts is made located to their lower base oic surface heater to be angled, menvshim 90 and interacts with vyotupom formed on the end surface of the bearing housing socket. Sources of information taken into account in the examination 1. The catalog of the company San (JviH CoromciM-t Drilling tool, R) - 8400: 2, 1977, p. 36-39. Drills with T - upakh with rotary plates.

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