SU602343A2

SU602343A2 - Machine for cutting thread with tap

Info

Publication number: SU602343A2
Application number: SU762434697A
Authority: SU
Inventors: Владимир Алексеевич Тарасов
Original assignee: Предприятие П/Я Р-6877
Priority date: 1976-12-28
Filing date: 1976-12-28
Publication date: 1978-04-15

Description

1one

Изобретение относитс к машиностроению и может быть использовано при механической обработке резанием.The invention relates to mechanical engineering and can be used during machining.

По соновном авт. св. № 435918 известен станок дл нарезани резьб метчиком, выполненный в виде станины-резервуара с жидкостью и поплавком, снабженным в днище отверстием и соединенным с золотником, на входе и выходе которого установлены дроссели , а на отвод щейветви трубопровода размещены дополнительный дроссель и клапан, According to autonomous car. St. No. 435918 is known for a tapping machine made in the form of a bed-tank with a liquid and a float, provided with a hole in the bottom and connected to the spool, inductors are installed at the inlet and outlet, and an additional choke and valve are placed at the outlet of the branch pipe,

С целью расщирени диапазона нарезани резьб малых диаметров за счет повыщени точности регулировки осевых усилий в предлагаемом станке в поплавке на его крыщке установлен стакан с вход щим в его полость трубопроводом, сообщающим ее с атмосферой и с источником сжатого воздуха.In order to expand the range of cutting threads of small diameters by increasing the accuracy of adjusting axial forces in the proposed machine, a cup is installed in the float on its lid with a pipeline into its cavity that connects it with the atmosphere and with a source of compressed air.

На фиг. 1 изображен предлагаемый станок, общий вид; на фиг. 2 - изменение осевого усили в процессе работы.FIG. 1 shows the proposed machine, a general view; in fig. 2 - change in axial force during operation.

Станок имеет резервуар 1 с жидкостью ; колонку 2. В резервуаре помещена емкость, г едставл юща собой поплавок 3, внутри коюрого на крышке помещен стакан 4, который через трубопровод 5 и распределительный кран 6 соединен с источником сжатого воздуха и атмосферой.The machine has a reservoir 1 with liquid; Column 2. A container is placed in the tank, which is a float 3, a container 4 is placed inside the container, which through pipe 5 and distribution valve 6 is connected to a source of compressed air and an atmosphere.

Стакан 4 поплавка заполн етс аналогично от автономного трубопровода сжатого воздуха при настройке станка на определенную осевую силу врезани . С целью исключени попадани в него воздуха из нолости поплавка торец емкости выступает относительно краев поплавка.The float cup 4 is filled similarly from an autonomous compressed air pipeline when the machine is tuned to a specific axial insertion force. In order to prevent air from entering it from the bottom of the float, the end of the tank protrudes relative to the edges of the float.

Стойка 7 св зывает поплавок со щпинделем 8. На кронщтейне 9 установлены путевые переключатели 10 и 11 крайних положений, св занные с электропневмозолотником 12, имеющим трубку 13. На входе золотника установлен регулируемый дроссель 14, редуктор 15 и кран 16, на выходе - регулируемый дроссель 17. Переключатели 10 и 11 срабатывают от кулачка 18. На кронщтейне 19 установлен посто нный груз 20 и привод 21.Rack 7 connects the float with the clamp 8. 8. Bracket 9 is equipped with directional switches 10 and 11 of the extreme positions associated with an electropneumatic air hammer 12 having a tube 13. An adjustable choke 14, a reducer 15 and a crane 16 are installed at the inlet of the valve, and an adjustable choke is installed at the inlet 17. The switches 10 and 11 are activated by the cam 18. On the arm 19, a constant load 20 and an actuator 21 are mounted.

На колонке 2 установлен второй кронщтейн 22 с поводком 23, который имеет возможность свободно поворачиватьс вверх и ограниченснизу.Column 2 is equipped with a second bracket 22 with a leash 23, which has the ability to freely rotate upward and limited to the bottom.

На кронщтейне 19 установлен нажимной включатель 24, управл ющий клапаном 25, который установлен на трубке 26 с регулируемым дросселем 27.A pressure switch 24 is installed on the arm 19, which controls the valve 25, which is mounted on the tube 26 with an adjustable throttle 27.

Claims

Before operation, the movable part is weighed with the dynomometer; the spool rod is in the left position (the main cavity of the float is connected to the atmosphere and its lifting force is zero, and the necessary amount of moving parts is equal to minus the lifting force generated by the cup 4. The choke 17 regulates the feed rate of the JIJIH-IH individual knot (parts 8, 19, 20 and 21), which should be at the moment the tap enters the hole equal to or slightly higher than the speed screwing in. Similarly, throttle 14 regulates the lifting speed, which is equal to or slightly higher than the unscrewing speed.; You can use an electric stopwatch connected in parallel with switches 10 and 11 to determine the speed. so that during the insertion of the intake part of the tap into the hole, the pressure in the cavity of the float is comparable to the atmospheric pressure. The weight of the entire mass of the moving parts of the spindle assembly will be equivalent to the axial force required for the operation of the tap. When the switch 10 is turned on, the actuator 21 begins to rotate, at the same time, the elec- tronic breaker 12 is triggered and sets to the far left position. From the cavity of the float 3 through the tube 13 and the throttle 17 rushes to atmospheric, and the bracket 19 with the spindle 8 begins to move downward at a speed equal to the screwing speed, which prevents the first edge of the tap from impact. At the time of tapping the tap 23, an additional pushbutton 24 is turned on, which remains on until the intake part of the tap is fully inserted. During this time, working from a switch, the valve 25 releases all pressure from the main cavity and the melt. At the same time, the weight of the moving parts provides for an increase in the axial force from the tool supply at POC-O to the calculated value (see Fig. 2, where zone 1 is the increase in the axial force for the calculated value that remains constant along the main thread length zone II). If in the process of threading a blunting of the tap occurs due to the changed material hardness of the batch of parts, etc., it is necessary to increase the axial force during rotation. To do this, turning the valve 6 counterclockwise, you must connect the pipeline 5 to the atmosphere and partially deflate the air from the glass 4. In this case, the axial force will be increased by reducing the lifting force of the float. If it is necessary to reduce the axial force, the crane 6 is installed, as shown in the drawing, the lifting force increases and the axial force accordingly decreases. After the switch AND has been activated, the drive 21 is reversed, and the electropneumator is set to the extreme right position. The air through valve 16, gearbox 15, throttle 14 and tube 13 rushes into the cavity of float 3. The lifting force of the float increases and compensates the weight of the moving parts, relieves axial force, and a slight axial force creates the negative axial force threads from rolling. Pa figs. 2 (zone P1) shows the moment of reversal and the change in axial force. With the passage of the bracket 19 and the switch 24 mounted on it, the leader 23 leans freely, without pressing the switch. When the switch 10 is turned on, the process is repeated. Thus, unlike the machine according to the main author's testimony, where the axial force is regulated discretely by a change in the load, in the proposed device the load remains constant, providing in total with the sub-. The movable parts of the spindle assembly allow the maximum axial force for the largest diameter of the thread cut by the machine. Axial forces for small threads are set by varying the lifting force of the additional tank. Claims machine for tapping on the author. St. L 435918, characterized in that, in order to broaden the thread cutting range of small diameters by increasing the accuracy of the axial forces adjustment, a glass is installed in the float on its lid with an inlet pipe of the pipe into its floor with an air source .