SU795739A1

SU795739A1 - Thread cutting apparatus

Info

Publication number: SU795739A1
Application number: SU772571363A
Authority: SU
Inventors: Виктор Иванович Смирнов
Original assignee: Smirnov Viktor
Priority date: 1977-12-13
Filing date: 1977-12-13
Publication date: 1981-01-15

Description

(54) УСТРОЙСТВО ДЛЯ НАРЕЗАНИЯ РЕЗЬБЫ(54) DEVICE FOR THREAD CUTTING

II

Изобретение относитс к зажимным патронам и оправкам дл креплени резьбонарезного инструмента на токарных станках и может быть использовано при нарезании резьбы метчиками, плашками и резьбонакатными головками.The invention relates to clamping chucks and mandrels for fastening a thread-cutting tool on lathes and can be used when tapping threads, dies and thread rolling heads.

Известно устройство, оснащенное упором и хвостовиком, на котором установлены держатель инструмента и зубчата муфта, одна полумуфта которой жестко закреплена на держателе, а друга - установлена на нем с возможностью осевого перемещени ЦIt is known a device equipped with a stop and a shank on which the tool holder and a gear coupling are installed, one coupling half of which is rigidly fixed to the holder and the other is mounted on it with the possibility of axial movement C

Недостатком устройства вл етс сложность его конструкции.The disadvantage of the device is the complexity of its design.

Цель изобретени - упрощение конструкции устройства.The purpose of the invention is to simplify the design of the device.

Поставленна цель достигаетс тем, что устройство снабжено жестко закрепленным на хвостовике хомутиком, на котором установлен упор, а полумуфта, установленна с возможностью осевого перемещени , выполнена с буртиком, предназначенным дл взаимодействи с упом нутым упором.The goal is achieved by the fact that the device is equipped with a clamp fixed on the shank, on which the stop is mounted, and the coupling half mounted with the possibility of axial movement, is made with a collar designed to interact with the said stop.

На чертеже представлена конструкци устройства.The drawing shows the structure of the device.

Устройство содержит хвостовик 1, держатель 2, зубчатую полумуфту 3, зубчатуюThe device contains a shank 1, a holder 2, a gear half coupling 3, a gear

СОЕРШSORPSH

Claims

coupling half 4, spring 5, adjusting nut 6, stop 7, rod 8, clamp 9, lock screw 10, sleeve 11, tongue 12, pin 13, cup 14, drum 15, lock 16, lock screw 17. The holder 2 is in the form The liner is mounted on the cylindrical part of the shank 1. The cylindrical part of the shank 1 is also fitted with a sleeve 11, the collar of which is included in the recess of the gear half coupling 3, which is installed by means of a threaded connection on the holder 2. In the collar of the sleeve 11, a pin 13 is inserted into the groove 18 the shank 1. On the sleeve 11 is put on the second coupling half 4, which holds TC from rotation relative to the bushing with the pin 12 and coupled with the floor coupling 3. The coupling half 4 is pressed against the coupling half 3 by a spring 5, the force of which is adjusted by a nut 6. On the shank 1 a collar 9 is installed, bearing the rod 8 with the stop 7. The rod 8 with the stop 7 can move axially and locking screw 10. Glass 14 carries the drum 15 with the latch 16, is installed in the bore of the holder 2 and is locked by the screw 17. The drum 15 is provided with radial slots for taps. The nests are of different sizes, with the nests located at a right angle to each other, are the same size and are intended for taps of the same set. The drum can be rotated around axis 19 and secured with latch 16. Glass 14 with drum 15 can be easily removed, and instead of the tap a die can be mounted on it (directly or using a transitional cup) or thread rolling head for cutting external threads. A groove 20 is provided in the holder 2 to exit the chip when cutting an external thread. The device is installed in a tailstock quill with a cone. The tap is gripped by the holder 2 into the machined hole by hand, while the pin 13 slides along the groove 18. After inserting the tap, the holder moves by self-feeding, and is rotated from the pin / 13 through rotation through the key 12 and the toothed coupling halves 4 and 3. When hit, for example, chips under the tap increases the torque and the half-coupling 3 slips relative to the half-coupling 4, and the holder 2 with the meter rotates together with the workpiece, excluding the cutting tool. When the set threading depth is reached, the shoulder of the coupling half 4 rests on the support 7, the coupling half 4, squeezing the spring 5, disengages from the coupling half 3. The holder 2 with the tap rotates together with the workpiece. When the direction of rotation of the workpiece is changed, the tap is unscrewed from the aperture and the holder 2 moves to its original position. The drum 15 is rotated 90 ° and the operation is repeated with the tap No.

2. Thus, the proposed device eliminates breakage of the cutting tool when working "in focus and biting, for example, chips, allows threading with presetting its length, provides cutting both internal and external threads with various tools, including taps, dies, thread rolling heads, etc. The invention A threading device equipped with a stop and a shank on which the tool holder and the gear coupling are mounted, one half coupling It is rigidly fixed on the holder, and the other is mounted on it with the possibility of axial movement, characterized in that, in order to simplify the construction of the device, it is equipped with a clamp fixed on the shank, on which the stop is mounted, and the coupling half installed with the possibility of axial movement, made with a collar designed to interact with said abutment. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 123024, cl. B 23 B 3/04, 1969.