SU992142A2

SU992142A2 - Thread cutting device

Info

Publication number: SU992142A2
Application number: SU813246767A
Authority: SU
Inventors: Феликс Николаевич Канареев; Сергей Петрович Машин; Борис Теодорович Жакич
Original assignee: Севастопольский Приборостроительный Институт
Priority date: 1981-02-12
Filing date: 1981-02-12
Publication date: 1983-01-30

Description

(54) РЕЗЬБОНАРЕЗНОЕ УСТРОЙСТВО(54) THREADED DEVICE

1one

Изобретение относитс к обработке металлов резанием.The invention relates to metal cutting.

По основному авт. св. № 895598 известно резьбонарезное устройство, содержащее корпус, в котором установлены шпиндель с выполненной на его конце резьбой, предохранительный механизм и механизм осевого перемещени шпиндел , параллельно шпинделю в корпусе установлена дополнительна винтова пара, котора св зана со шпинделем через планку, а разность шагов резьбы шпиндел и ходового винта дополнительной винтовой пары равна шагу нарезаемой резьбы 1.According to the main author. St. No. 895598 a thread-cutting device is known, comprising a housing in which a spindle with a thread made at its end, a safety mechanism and a mechanism for axial movement of the spindle are installed parallel to the spindle in the housing there is an additional screw pair that is connected to the spindle through the bar and the spindle thread pitch difference and the lead screw of the additional screw pair is equal to the pitch of the cut thread 1.

Недостатком устройства вл етс невозможность нарезани резьб различного шага без его разборки.The disadvantage of the device is the impossibility of cutting threads of different pitch without disassembling it.

Цель изобретени нарезание резьб двух различных шагов.The purpose of the invention is threading two different steps.

Дл достижени , поставленной цели ходовой винт дополнительной винтовой пары выполнен в виде шпиндел , установленного в корпусе с возможностью осевого перемещени .To achieve the set goal, the lead screw of the additional screw pair is made in the form of a spindle mounted in the housing with the possibility of axial movement.

На фиг. 1 изображено устройство, общий вид; на фиг. 2 а, f 3 а, (f схема работы устройства.FIG. 1 shows the device, a general view; in fig. 2 a, f 3 a, (f scheme of operation of the device.

Резьбонарезное устройство состоит из корпуса 1, в котором с возможностью вращени установлены втулки 2 и 3 с зубчатыми венцами, в которые помещены шпиндели 4 и 5, св занные со втулками 2 и 3 с возможностью осевого перемещени относительно последних шпонками 6 и 7. В нижней части шпинделей 4 и 5 закреплены инструменты-метчики 8 и 9. На резьбовой части 10 шпиндел 4 установлена гайка 11, помещенна в планку 12, в которой помещена также гайка 13, установленна на резьбовой части 14 шпиндел 5. Во втулках 2 и 3 15 расположены винты 15 и 16, служащие дл фиксации шпинделей 4 и 5 в осевом направлении . Во вращение втулки 2 и 3 с зубчатыми венцами привод тс зубчатым колесом 17. Обрабатываемые детали 18 и 19. Резьбонарезное устройство работает The thread-cutting device consists of a body 1 in which bushings 2 and 3 are rotatably mounted with toothed rims in which spindles 4 and 5 are placed and connected to bushings 2 and 3 with axial movement relative to the latter with keys 6 and 7. At the bottom Spindles 4 and 5 secure the tools-taps 8 and 9. On the threaded part 10 of the spindle 4 there is a nut 11 placed in the bar 12, in which the nut 13 is also placed, mounted on the threaded part 14 of the spindle 5. In the sleeves 2 and 3 15 there are screws 15 and 16 serving for fixing spindles 4 and 5 in the axial direction. In rotation, the sleeves 2 and 3 with the gear rims are driven by the gear wheel 17. The workpiece 18 and 19. The tapping device works

20 следующим образом.20 as follows.

Claims

The initial position of the elements of the device when threading the left pinch is shown in FIG. 2a The right spindle 5 is fixed axially with screw 16 (Fig. 1). Screw 15 is unscrewed. The rotation from the gear wheel 17 is transmitted to the sleeves 2 and 3 with the gear rims and through the keys 6 and 7 to the spindles 4 and 5. The nut 13 is screwed along the threaded part 14 of the spindle 5 downwards. At the same time, the spindle 4 is unscrewed from the nut 11 in the direction opposite to the direction of mixing% of the nut 13. Thus, the axial displacement of the spindle 4 consists of two movements: down - together with the nuts 13 and 11, up - when unscrewing from the nut 11 V of the workpiece 18 thread is cut. Since the axial movement of the pinch 4 and its rotation are kinematically connected, then in one revolution it makes an axial movement equal to the value of Pj-i-PI where i is the gear ratio of the sleeves 2 and 3 with the toothed rims; P, and 1 are the thread steps of the nuts 11 and 13. This movement is equal to the pitch of the tap tool 8. When the required depths of threading are reached (Fig. 26), the spindles 4 and 5 begin to rotate in the opposite direction and the device returns to its original position (Fig. 2a). The initial position of the elements of the device when threading the right pinch is shown in FIG. Zo The left spindle 4 is in the lower position and secured against axial movement by the screw 15 (Fig. 1). Screw 16 is loosened. Spindle m 4 and 5 reported rotation. The nut 11 is moved upward along the threaded part 10 of the pinch 4. At the same time, the spindle 5 is screwed into the nut 13 in the direction opposite to the direction of movement of the nut 11. Consequently, the spindle 5 participates in two movements: up - together with nuts 11 and 13, down - when screwed into nut 13. The thread is cut into part 19. For one turn, the spindle 5 makes an axial movement equal to the value of P2-Pi / i and equal to the pitch of the tap 9. The position of the elements of the device when the right spindle 5 reaches the lower position is shown in FIG. 36. The device then returns to its original position (Fig. Per). The implementation in the proposed thread-cutting device of the lead screw of an additional screw pair in the form of a spindle mounted in the housing with the possibility of axial displacement allows one to achieve the expansion of the technological capabilities of the thread-cutting device, namely, to enable threading of various stumps without disassembling the device and replacing its parts. The invention The thread-cutting device according to ed. St. No. 895598, characterized in that, in order to periodically cut the threads of two different steps, the lead screw of the additional screw pair is made in the form of a spindle mounted in the housing with the possibility of axial movement. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 895598, cl. In 23 G 1/16, 1980.