SU831425A1

SU831425A1 - Built-up face milling cutter

Info

Publication number: SU831425A1
Application number: SU772512867A
Authority: SU
Inventors: Степан Григорьевич Нагорняк; Иван Георгиевич Завирохин
Original assignee: Nagornyak Stepan G; Zavirokhin Ivan G
Priority date: 1977-07-25
Filing date: 1977-07-25
Publication date: 1981-05-23

Description

Изобретение относится к металлообработке. ·The invention relates to metalworking. ·

Известна торцовая фреза, содержащая корпус, промежуточный диск, связан- , ный посредством шпонки с жесткой оправкой, резиновые демпфирующие элемен ты, установленные в канавках корпуса и контактирующие с торцом промежуточного диска [1] ,A face mill is known comprising a housing, an intermediate disk connected by means of a key with a rigid mandrel, rubber damping elements installed in the grooves of the housing and in contact with the end face of the intermediate disk [1],

Однако такая конструкция не обеспечивает эффективного демпфирования а, следовательно, и снижения уровня динамических ударных нагрузок, возникающих в процессе фрезерования и не устраняет торцового биения фрезы.However, this design does not provide effective damping and, consequently, to reduce the level of dynamic shock loads that occur during the milling process and does not eliminate the end runout of the cutter.

Цель изобретения - повышение долговеч^сти фрезы.The purpose of the invention is to increase the durability of the cutter.

Поставленная цель достигается тем, что фреза снабжена регулировочными винтами с гладким цилиндрическим концом, ввернутыми в резьбовые отверстия, выполненные в теле промежуточного дис ка равномерно по окружности, а канавки корпуса выполнены с тангенциальным^³ скосами и в них установлены сухари с углублениями под цилиндрические концы винтов, предназначенные для взаимодействия с демпфирующими элементами.This goal is achieved by the fact that the cutter is equipped with adjusting screws with a smooth cylindrical end screwed into threaded holes made in the body of the intermediate disk uniformly around the circumference, and the body grooves are made with tangential ^ ³ bevels and rusks with recesses for the cylindrical ends of the screws are installed in them designed to interact with damping elements.

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На фиг. 1 изображена предлагаемая фреза, продольный разрез; на фиг. 2 вид А-А ни фиг. 1; на фиг. 3 - вид Б- на фиг 1.In FIG. 1 shows the proposed mill, a longitudinal section; in FIG. 2 is a view A-A of FIG. 1; in FIG. 3 is a view B- of FIG. 1.

В шпинделе 1 фрезерного станка установлена оправка 2, с которой связан посредством шпонки 3 промежуточный диск 4. В нем равномерно по окружности выполнены резьбовые отверстия 5, в которые ввернуты регулировочные винты 6 с гладкими цилиндрическими концами 7. В корпусе 8 фрезы выполнены дуговые канавки 9 с тангенциальными скосами 10. В канавках расположены резиновые демпфирующие элементы 11 и предназначенные для взаимодействия с ними своими торцами сухари .12 с углублениями 13.Arbor 2 is mounted in the spindle 1 of the milling machine, to which an intermediate disk 4 is connected by means of a key 3. Threaded holes 5 are made therein, into which the adjusting screws 6 are screwed with smooth cylindrical ends 7. Arc grooves 9 are made in the mill body 8 tangential bevels 10. In the grooves are rubber damping elements 11 and crackers .12 with recesses 13 designed to interact with them with their ends.

В углубления 13 входят с зазором цилиндрические концы 7 винтов 6. Корпус 8 поджимается к промежуточному диску 4 посредством центрального регулировочного винта 14, на внутреннем торце головки 15 которого выполнена сплошная кольцевая канавка под шарики 16. В корпусе 8 установлены державки с режущими пластинами 17, подтягиваемыми к поверхности кольцевой выточки 18, выполненной на торце корпуса 8, винтами 19.The cylindrical ends 7 of the screws 6 enter the recesses 13 with a gap. The housing 8 is pressed against the intermediate disk 4 by means of a central adjusting screw 14, on the inner end of the head 15 of which there is a continuous annular groove for the balls 16. In the housing 8 there are holders with cutting plates 17 that are retractable to the surface of the annular undercut 18, made at the end of the housing 8, by screws 19.

С целью устранения самоотвинчивания винта 14 в корпус 8 запрессовано кольцо 20 с внутренними зубьями, с которыми находится в зацеплении отогнутой конец плоской пружины 21, второй конец которой неподвижно соеди- 5 йен с периферией винта 14.In order to eliminate the self-loosening of the screw 14, a ring 20 with internal teeth is pressed into the housing 8, with which the bent end of the flat spring 21, the second end of which is fixedly connected to the periphery of the screw 14, is engaged.

При вращении шпинделя и взаимодействии пластинок 17 с деталью, крепящий момент передается от шпинделя через шпонку 3 на промежуточный диск 4 jq и далее через регулировочные винты 6 на сухари 12 и далее через резиновые демпфирующие элементы 11 на корпус 8 с режущими пластинами 17.During rotation of the spindle and the interaction of the plates 17 with the part, the torque is transmitted from the spindle through the key 3 to the intermediate disk 4 jq and then through the adjusting screws 6 to the crackers 12 and then through the rubber damping elements 11 to the housing 8 with the cutting plates 17.

Демпфирующие элементы 17 обеспечивают гашение колебаний при передаче пульсирующих нагрузок от корпуса 8 фрезы на привод ее вращения.The damping elements 17 provide damping of vibrations during the transfer of pulsating loads from the body 8 of the cutter to the drive of its rotation.

Наличие тангенциальных скосов способствует высокой демпфирующей способности демпфирующих элементов -11, которые при сжатии частично заполняют свободный объем, образованный между внутренней вертикальной поверхностью элемента 11 и плоскостью тангенциального скоса 10. ' 25The presence of tangential bevels contributes to the high damping ability of the damping elements -11, which when compressed partially fill the free space formed between the inner vertical surface of the element 11 and the plane of the tangential bevel 10. '25

Claims

The invention relates to metal working. The known face milling cutter contains a body, an intermediate disk connected by means of a key with a rigid mandrel, rubber damping elements installed in the grooves of the body and in contact with the end face of the intermediate disk 1. However, this design does not provide effective damping and, consequently, reduce The level of dynamic shock loads that occur during the milling process does not eliminate the face beating of the cutter. The purpose of the invention is to increase the durability of the cutters. The goal is achieved by the fact that the cutter is equipped with adjusting screws with a smooth cylindrical end, screwed into the threaded holes made in the body of the intermediate head evenly around the circumference, and the body grooves are made with tangential bevels and have crackers with recesses under the cylindrical ends of the screws designed to interact with damping elements. FIG. 1 image offered a mill, longitudinal section; in fig. 2 view A-A or FIG. l in fig. 3 - B-view in FIG. 1. In the spindle 1 of the milling machine, a mandrel 2 is installed, with which the intermediate disk 4 is connected by means of the key 3. There are threaded holes 5 in which the adjusting screws 6 with smooth cylindrical ends 7 are screwed evenly around the circumference. In the housing 8 of the cutter, arc grooves 9 are made with tangential bevels 10. Rubber damping elements 11 and rusks 12 with grooves 13 are located with grooves arranged in them; In recesses 13, cylindrical ends 7 of screws 6 are fed in with a gap. Case 8 is pressed against the intermediate disk 4 by means of a central adjusting screw 14, on the inner end of which head 15 there is a continuous annular groove for the balls 16. In case 8, holders with cutting plates 17 are installed; screws 19, bendable to the surface of the annular undercut 18, made at the end of the housing 8, to eliminate the self-unscrewing of the screw 14 into the housing 8. The ring 20 with internal teeth with which the chuck is engaged engages The end of the flat spring 21, the second end of which is fixedly connected to the periphery of the screw 14. When the spindle rotates and the plates 17 interact with the part, the fixing moment is transmitted from the spindle through the key 3 to the intermediate disk 4 and then through the adjusting screws 6 on rusks 12 and further through rubber damping elements 11 onto the body 8 with cutting plates 17. The damping elements 17 provide damping of vibrations during the transfer of pulsating loads from the body 8 of the cutter to the drive of its rotation. The presence of tangential bevels 10 contributes to the high damping capacity of the damping elements -1, which, when compressed, partially fill the free volume formed between the inner vertical surface of the element 11 and the plane of the tangential bevel 10. Formula from the braid inserted by means of a key with a rigid mandrel, rubber damping elements installed in the grooves of the body and in contact with the end of the intermediate disc are distinguished by In order to increase the durability of the cutter, it is provided with regulation. with screws with a smooth cylindrical end, screwed into the threaded holes made in the body of the intermediate disk evenly around the circumference, and the body grooves are made with tangential bevels and they are equipped with crackers with reinforcements under the cylindrical ends of the screws designed to interact with the damping elements. Sources information taken into account during the examination 1. USSR author's certificate No. 643254, cl. 23 C 5/06, 1977.

18

1

Type B

LL

3

Fig.Z