SU1470408A1 - Machine for rolling thread onto hollow workpieces - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used for rolling threads on hollow billets. The purpose of the invention is to expand the technological capabilities of the device by rolling threads on parts with a wall thickness equal to 1/20 of the diameter of the workpiece. For this, the machine is provided with safety and reversing mechanisms. The latter is made in the form of a splined hub mounted for rotation and kinematically connected with the main spindle of the machine. A safety mechanism is installed between the main spindle and the mandrel, which ensures the rotation of the workpiece when the thread is rolling. During the operation of the machine, a rotating workpiece is introduced into the space between the rolling rollers of the machine to the shoulder. The safety mechanism is activated. The main spindle, moving in the opposite direction, drives the additional spindle, rotating in the opposite direction, which, in turn, comes into contact with the workpiece and ensures its turning out of the knurled head. 3 il.

Description

one

The invention relates to the processing of metals by plastic deformation and can be used for rolling threads on hollow, thin-walled workpieces with a collar.

The aim of the invention is to expand the technological capabilities by rolling threads on hollow parts with a collar and wall thickness: 1/20 of the diameter of the workpiece.

FIG. 1 shows the machine in the final working position, general view; FIG. 2 - the same, in the initial position, top view, in FIG. 3 shows section A-A in FIG. 2

The machine includes a frame 1, on which the headstock 2 of the drive with a hollow shaft 3 is fixed, in which the spindle 4 is placed by means of splines. On the base 1 also the power cylinder 5 and the body 6 are fixed, and the rod 7 is rigidly fixed on the rod of the power cylinder 5 by means of balls 8 with spindle 4.

In the through holes of the headstock 2 and the body 6, the sleeves 9 and 10 are fixed in which guide pins 11 are placed with the possibility of axial movement, one end of which is rigidly fixed with the help of nuts in the bar 7, and the others are installed in the bar 12. On the rolling pins 11 are mounted through sleeves

one

About 4

00

3-14

13, the yoke 14, while the rolling pin 15 is made on the rolling pins, to which the yoke is tucked in by the spring 16, the second end of which rests against the drive head 2. The spindle 4 is connected to the mandrel 17 via a slip clutch 18 with adjustable torque, for example a friction torque, while the mandrel 17 has a lead made in accordance with the shape of the element of the workpiece transmitting the torque, for example, in the form of an internal hex. 14, in the sliding bearing 19 with the possibility of axial movement. On the housing 6, a loading device is fixed with a chute 20 and a cutter 21 for workpieces in contact with the crosshead 14

22, a on the cross beam 14, a receiver 23 is provided with spring-loaded latches 24. In case 6, a threaded knob 25 is installed with rollers 26 and a key-blade 27, and in bearings 28 a spline sleeve 29, which is connected via gears 30-33 with output shaft 3 headstock drive.

At the same time, a parasitic gap 24 is installed between the gear wheels 30 and 31, which provides the reverse spline sleeve 29 with respect to the output hollow shaft 3. An additional spindle 35 is installed in the split sleeve 29, one end of which is connected to the bar 12 rotatably with balls. 36. At the other end of the pre-shared rotation, it feeds the rollers 26. The thread rolling process begins. Before the moment of contact of the collar of the workpiece 22 and the ends of the rollers

The additional mandrel 37 is fixed and enveloping the springs - 40 26 the final switching of the spring 38 triggers the sleeve 39, while the body (not shown) gives the command that their heads lie in the same plane. The mandrel 37 has a leash, made in accordance with the shape of the element, pelov cylinder 5 on the return stroke. As a result of this, plank 7 with rolling pins 11, spindle 4,

By reducing the torque at workpiece 45 with the crossbeam 14 and the bar 1 2 s, the additions, for example, in the form of an external spindle 35, begin to return to their original position.

grannik.

The machine works as follows.

Oriented workpieces 22 are fed to the tray 20 of the loading device - 50 meters. The rotating spindle 4 connected with the power cylinder 5 with the amendment 17 and the yoke 14 are in the extreme initial position, which enables the blank 22 to enter the receiver 23, where it is fixed from being turned over by spring-loaded latches 24 in contact with its shoulder.

55

0

0

The piece-feed 22 of the workpieces 22 is controlled by a cutter 21. In this case, the additional spindle 35 rotates in the direction opposite to the rotation of the pinch 4, and is positioned in such a way that both ends of the mandrel 37 fixed on it and the female bushing 39 protrude by some amount at the ends of the rollers 26 the sides of the lip 27. After the preform 22 enters the receiver 23, the working stroke of the power cylinder is carried out, in which the bar 7 with the fixed

5 on it, the guide pins 11 and the rotating spindle 4 with the mandrel 17 begin to move in the axial direction. It also moves. along guide pins 11 under the influence of traverse springs 16. 14, carrying the workpiece 22 into the receiver 23. Simultaneously with the main spindle 4 in the same direction, the movement performs an additional spindle 35, since it is connected with a strap 12 fixed at the other ends of the guide rollers 11.

With further axial movement of the yoke 14 rests on the cover 27 of the thread rolling head 25 and stops. In this case, the spindle 4 continues the axial movement, and the mandrel 17 fixed on it with its internal hexagon is put on the 35th hex of the billet 22 and,

the rotation rotates it, gives it to the rollers 26. The thread rolling process begins. Before the moment of contact of the collar of the workpiece 22 and the ends of the rollers

five

thirty

40 26 the final switch is activated (not shown) and gives the command to

26, an end switch (not shown) is activated and gives a command to

cylinder 5 on the return stroke. As a result of this, the strap 7 with the right rolling pins 11, the spindle 4,

traverse 14 and bar 1 2 with additional

The body spindle 35 begins to return to its original position.

The mandrel 17 exits the workpiece 22, but continues to screw it into the rollers 26, as well as has a rotation. As soon as the collar of the workpiece 22 touches the ends of the rollers 26, the torque begins to increase and the slip-slip coupling, tuned to a torque, exceeding the torque at

rolling up the thread, it triggers and the mandrel stops rotating.

After the mandrel 17 exits the blank 22 and returns to

the initial position, to the workpiece from the side of its other end, is suitable an additional spindle 35, having rotation by means of a spline sleeve 29, which receives rotation from the output hollow shaft 3 of the spindle head 2 due to gear wheels 30-33, parasitic gear 34 providing sleeve 39 under the influence of the spring 38 will push it out of the treatment area, preventing a possible hang on the mandrel 37. After this, the time relay gives a command to the working stroke. The cycle is repeated.

The machine allows rolling threads on hollow thin-walled blanks with

The direction of rotation is opposite to that of the main spindle 4. When the mandrel 37, made in the form of an external hexagon, will enter the internal hexagon of the workpiece 22, the latter will begin to move out of the rollers, and the end of the female sleeve 39, touching the end of the workpiece, will begin to lag behind the end of the frame 15

bakes rolling rezba (in emphasis) with any tolerance on the length of the workpiece,

Claims (1)

Invention Formula A machine for rolling threads on hollow billets, comprising a frame, a power cylinder and a drive head attached to it, in which compressing the spring 38, the Additional 20 is installed the main spindle with the mandrel, the spindle 35 axially displaces until the end of the mandrel 37 comes out of the ends of the rollers 26 by a certain amount, which is set by adjusting the workpiece, the thread rolling head with the rollers, and the guide pins associated with the ram. by that which, at this time, the traverse 14, contacting 25, will take its initial position under the loading device in order to expand the technologizing with the shoulders 15 of the guide skalok 11, the slam-shut 21 and the next billet 22 enters the receiver 23, At the same time, the end switch (not shown) is activated and gives the command to the actuator 5 to stop, and the pneumatic time switch (not shown) withstands it for some time in the initial position. During the exposure time of the power cylinder 5, and accordingly, of the entire system in the initial position, the rotating additional spindle 35 continues to unscrew the workpiece 22 from the rollers. As soon as under the influence of the spring 38, the workpiece 22 leaves the rollers, the occlusion possibilities due to the rolling of hollow parts with a collar, wall thickness equal to 1/20 of the diameter of the billets, and a groove on the end face, it is equipped with 30 safety and reversing mechanisms the latter is made in the form of a splined hub placed with the main spindle and an additional spindle located in it with the possibility of axial movement, on the end of which a projection is made. the groove of the workpiece, and the slot of the sleeve is rotatably mounted and kinematically connected with the main spindle, with a safety mechanism located between the main spindle and the mandrel. 35 40 1470408 The roll-in sleeve 39, under the influence of the spring 38, will push it out of the treatment zone, preventing a possible hang on the mandrel 37. After this, the time relay gives a command to the working stroke. The cycle is repeated. The machine allows rolling threads on hollow thin-walled blanks with collar without reverse of the engine and bakes rolling rezba (in emphasis) with any tolerance on the length of the workpiece, Invention Formula A machine for rolling threads on hollow billets, comprising a frame, a power cylinder and a drive head attached to it, in which a main spindle with a mandrel under the workpiece, thread rolling go, roller cob, and guide pins connected to the power cylinder, which is different by that With the aim of expanding technological capabilities due to rolling of hollow parts with a collar, wall thickness equal to 1/20 of the diameter of the billet, and a groove on the end, it is equipped with safety and reversing mechanisms installed on the frame, the latter being made in the form of with the main spindle splined sleeve and located in it with the possibility of axial movement of the additional spindle, at the end of which the protrusion is made under. the groove of the workpiece, and the slot of the sleeve is rotatably mounted and kinematically connected with the main spindle, with a safety mechanism located between the main spindle and the mandrel. FIG.