SU768572A1

SU768572A1 - Apparatus for securing tool in machine spindle

Info

Publication number: SU768572A1
Application number: SU782702435A
Authority: SU
Inventors: Вячеслав Михайлович Шульц; Николай Иванович Иванов
Original assignee: Ленинградское Специальное Конструкторское Бюро Тяжелых И Уникальных Станков
Priority date: 1978-12-27
Filing date: 1978-12-27
Publication date: 1980-10-07

Description

1one

Изобретение относитс к машиностроению , в частности к средствам креплени и освобождени инструмента в шпинделе металлорежущих станков.The invention relates to mechanical engineering, in particular to means of fastening and releasing a tool in a machine tool spindle.

Известны устройства дл креплени инструмента в шпинделе станка посредством шомпола, включающие зубчатое колесо, расположенное соосно шпинделю, предохранительную муфту и конечный выключатель }.Known devices for fastening a tool in a machine spindle by means of a ramrod include a gear wheel aligned with the spindle, a safety clutch and a limit switch}.

Недостатком известных устройств вл етс отсутствие контрол окончани зажима и отжима инструмента.A disadvantage of the known devices is the lack of control of the end of the clamping and pressing of the tool.

Цель изобретени - повышение надежности работы устройства.The purpose of the invention is to increase the reliability of the device.

Дл этого устройство снабжено дополнительным зубчатым колесом, идентичным по параметрам и соосным первому, и закрепленными на шпинделе двум одинаковыми шестерн ми, смонтированными на общем валу, кажда из которых установлена с возможностью зацеплени с одним из зубчатых колес, упором, расположенным на валу шестерни, дополнительным конечным выключателем и тормозной муфтой, смонтированной соосно щпинделю, причем посадочные поверхности шестерни и вала выполнены резьбовыми и образуют передачу винт-гайка, первое зубчатое колесо св зано с предохранительной и тормозной муфтами,For this, the device is equipped with an additional gear wheel, identical in parameters and coaxial to the first, and mounted on the spindle with two identical gears mounted on a common shaft, each of which is mounted with the possibility of engagement with one of the gear wheels, an emphasis located on the gear shaft, an additional a limit switch and a brake clutch mounted coaxially with a pin, the seating surfaces of the pinion and shaft are threaded and form a screw-nut gear; the first gear is connected but with a safety brake and clutches,

а упор установлен с возможностью взаи . модействи с дополнительным конечным выключателем.and the emphasis is set with the possibility of reciprocating. with additional limit switch.

На чертеже изображено предлагаемоеThe drawing shows the proposed

5 устройство в разрезе.5 device in section.

Устройство содержит два зубчатых колеса 1 и 2, имеющих одинаковое число зубьев и размещенных в корпусе 3 устройства соосно шпинделю 4. Зубчатое колесо I закреплено на шпинделе 4, а зубчатое колесо 2 установлено с возможностью вращени на подшипниках 5 в стакане б, закрепленном на корпусе 3. Внутри шпиндел 4 с возможностью осевого смещени проходитThe device contains two gears 1 and 2, having the same number of teeth and placed in the housing 3 of the device coaxially with the spindle 4. The gear I is fixed on the spindle 4, and the gear 2 is rotatably mounted on bearings 5 in glass b fixed on the housing 3 Inside the spindle 4 with the possibility of axial displacement passes

15 шомпол 7, который одним концом соединен с механизмом 8 захвата хвостовика инструмента 9, а другим - с винтом 10, который резьбовым концом ввернут в шомпол 7 и закреплен от осевого смещени подшипниками 11. Шомпол 7 лишен вращени относительно шпиндел 4 шлицами стакана 12. Винт 10 установлен на подшипниках 13 зубчатого колеса 2 и несет предохранительную муфту 14, торцевые зубь 15 которой15 ramrod 7, which at one end is connected to the tool grabbing mechanism 8 of the tool shank 9, and the other with a screw 10, which is screwed to the ramrod 7 by a threaded end and secured against axial displacement by bearings 11. The ramrod 7 is free of rotation relative to the spindle with 4 slotted cup 12. Screw 10 is mounted on bearings 13 of the gear 2 and carries a safety clutch 14, the end teeth of which 15

25 вход т в контакт с аналогичными зубь ми колеса 2 под действием пружины 16. Муфта 14 лишена вращени относительно винта 10 штифтом 17, соединенным средней частью с т гой 18, проход щей с возможностью25 comes into contact with similar teeth of the wheel 2 under the action of the spring 16. The coupling 14 is devoid of rotation relative to the screw 10 by a pin 17 connected by a middle part with a tension 18, which passes with

Claims

30 axial displacement inside the screw 10. The free end of the rod 18 is connected to the stop 19, which interacts with the limit switch 20. On the gear wheel 2 there is a brake clutch 21, which is attached to the case 3 by means of glasses 6 and 22 with bolts 23. Gear wheels 1 and 2 are meshed respectively with coaxial gears 24 and 25, which are mounted in the housing 3 with the possibility of rotation of the bearing spacers 26. The gears 24 and 25 are interconnected by a screw-nut gear. A screw 27 of this gear is placed on the slots inside the gear 25 with the possibility of axial displacement. The threaded end of the screw 27 is screwed into the threaded hole of the gear 24 and communicates with the movable nut 28, which is devoid of rotation relative to the gear 24 by the key 29 and is jogged to the threads of the screw 27 by the spring 30. The second end of the screw 27 is connected to the stop 31, which interacts with the limit switch 32. The limit switches 20 and 32 are fixed with the help of the bracket 33 on the glass 22 and are closed by the covers 34. The device operates as follows. When clamping or spinning, the brake clutch 21 is inserted, which prevents the gear wheel 2 from rotating. The wheel 2 with the end teeth 15 through the safety clutch 14 and the pin 17 prevents the screw 10 from rotating. At the same time, due to the gearing with the wheel 2, the gear 25 loses its splines are screw 27. For squeezing tool 9, spindle 4 is turned with sprocket 1 and cup 12 secured on it. Spline of cup 12 causes spindle 7 to rotate. Interacting with the thread of a stalled screw 10, ramrod 7 biases from the left, moving the gripper 8, releasing the tool shank 9 and pushing it out of the Schnandell 4 cone. At the same time, the gear wheel 1 rotates the gear 24, which with its thread moves the screw 27 to the right. The screw 27 moves the stop 31, which at the time of the end of the spin interacts with the limit switch 32, disengaging the brake clutch 21. The gear wheel 2 and the gear 25 are released. Due to the moment of friction in the thread created by the spring 30 through the nut 28, the screw 27 spins the gear 25 into rotation, which transfers the rotation to the gear 2. The gear 2 through the end teeth 15, the safety clutch 14 and the pin 17 causes the screw 10 to rotate. Due to the equality of the number of teeth of the wheels 1 and 2, the screw 10 rotates at the same angular velocity and in the same direction. as spindle. This stops the movement of the ramrod 7. The pressing of the tool is completed. The force of the spring 30 is chosen in such a way that the moment of friction generated by it on the thread of the screw 27 is greater than the residual moment of the brake clutch 21. To clamp the tool 9, turn the spindle 4 in the reverse direction. The spindle 4 rotates the ramrod 7 through the splines of the cup 12. Interacting with the threads of the braked screw 10, the ramrod 7 is shifted to the right, moving the grip 8 associated with the tool shank 9. When the required clamping force is reached, the safety clutch 14 is activated, which compresses the spring 16, removes the tooth 15 from engagement, and through the pin 17 moves the fu 18 with the stop 19. The stop 19, interacting with the limit switch 20, disconnects the brake clutch 21. At the same time, the screw 10 rotates on the bearings 13. Due to the moment of friction in the thread in Int 27, receiving rotation from gear 1 through gear 24, drives gear through rotation 25 through gear 25

2. The angular velocities of the wheel 2, the screw 10 and the rod 7 are equalized, and they begin to rotate together. The spring 16 moves the clutch 14 to its original position and the clamp stops. The force of the spring 16 is selected depending on the required clamping force of the tool 9 and the profile of the teeth 15. The described device will increase the reliability of the control of the clamped and pressed state of the tool. The operation speed of the device is increased, the control system is simplified and provides automation of both fastening and tool changes. Placing the device on the rear end of the shpinddel does not require an increase in spindle outreach from the front support, increasing the rigidity of the machine. An apparatus for fastening a tool in a machine spindle by means of a ramrod, comprising a gear wheel coaxially arranged with a spindle, a safety clutch and a limit switch, characterized in that it is equipped with an additional gear wheel that is identical in parameters and coaxial to the first , and mounted on the spindle with two identical gears mounted on a common shaft, each of which is mounted with the possibility of gearing with the bottom of the toothed field, With a gear located on the gear shaft, an additional limit switch, and a brake uft mounted coaxially with the spindle, the seating surfaces of the shaft gear are threaded and form a 5th gear screw-nut, the first gear is connected to the safety and brake clutches, and the stop is installed with interactions with an additional limit switch. 5 6 Sources of information taken into account during the examination 1. USSR author's certificate No. 588074, cl. B 23 C 5/26, 02.09.75.