SU692658A1 - Rom4 machine for rolling-over tubular work - Google Patents

Description

one

The invention relates to the processing of metals by pressure and can be used for the manufacture of articles from tubular billet, for example, for the manufacture of cylinders with run-in bottoms and necks. .

The known machine for haulage of tubular blanks, comprising a frame, a shaft with two rotating drums axially mounted on it, in which the spindles are located, and in another, the mechanisms for loading the blanks, and the forming tool between them. The loading mechanisms and spindles are provided with rollers that interact with the copy grooves of the sleeves fixedly mounted on the frame of the cage, inside which are located the drums. The chutes of the loading mechanism are moved with the copy roller along with the workpiece to the stop into the spindle drum 1.

However, the known machine has large dimensions of the drum with loading mechanisms.

The closest solution to the invention is a machine for rolling tubular blanks, comprising a frame, a driven shaft mounted on it, two oxially mounted.

installed on the shaft of the drum, on one of which are placed loading mechanisms that have pushers with fingers, and on the other corresponding spindles. The loading mechanisms of the cycle also contain a coping bushing with a paddle mounted freely on the drive shaft, with the coping groove of the bushing executed on its outer surface 2.

When the drum rotates with the loading mechanisms, the cam roll roller moves along the cam slot.

5 vyJZhI and leads behind a pusher, which sets the workpiece in the corresponding spindle. A loading mechanism of this kind of design allows one to define blanks of a specific

0 length (no more than 3-4 diameter of the workpiece), as a copy groove must have a certain angle of elevation and. do not exceed the maximum permissible angle, which is equal to the coefficient of friction of the roller in the groove of the roller sleeve. The pusher roller moves along the groove of the coping bushing at a certain constant speed due to the speed of rotation of the water shaft.

This machining machine for cooking has a smaller size and ability to load in a convenient area of the process space, however, this machine is not intended for running in long blanks due to the peculiarities of: Design of loading mechanisms. In a star-shaped design to ensure the task of long piles, it is necessary to increase the diameter or width of the coping sleeve and, accordingly, the dimensions of the machine, so with a workpiece length of mm and a diameter of mm, the diameter of the drum will increase approximately 1.5-1.8 times; or perform for each loading mechanism its own copy groove, which will lead to an increase in the dimensions of the machine 1 according to length, resulting in an increase in the width of the Copy Sleeve, or an increase in the length of the feeding area of the Teal pushing, will increase the task time of the heated workpiece by 23 times , especially for thin-walled blanks.

The aim of the invention is to expand the technological capabilities of the machine by enabling the task of long blanks.

This is achieved by the fact that the loading mechanisms are equipped with a sector driven fork, the arc length of which is less than the springing distance between adjacent positions, and the fingers of the pushers are placed in the cavity of the fork. FIG. 1 shows a machine, front view and top view; in fig. 2 boot device; in fig. 3 is a view along arrow A of FIG. 2; in fig. 4 section bb in fig. 2;

In the machine bed 1, the machines are mounted on shaft 2 with axially rotating loading drum 3 with mechanisms. load 4 and spindle drum 5, in koTopcM mounted spindles ё.

. The rotation of the drums consists of the drive motor 7, the gearbox 8, the gear pair 9, the cardan 10 and the gear pair 11, the driven wheel of which is mounted on the spindle drum 5 and rotates the spindle and feed drums through a common shaft 2 The drive of the spindle spins from the electric motor 12 and two gears 13 and 14. The loading mechanisms have a pneumatic cylinder 15, mounted on a rack 16, and an Induction sector fork 17, consisting of two sectors, between which Ns distance sleeves 18 go. The sector fork is reinforced on the rod of the pneumatic cylinder and to prevent skewing is equipped with guide rods 19.

To provide alternate operations, the arc length L of the sector fork is less than the circumferential height L- between adjacent positions, as a result of which, during operation, only one pusher can be located in the sector fork.

The loading drum 3 is made in the form of crosses 20, on which gutters 21 are mounted. The loading mechanisms also have pushers 22 with fingers 23 with rollers 24. The loading drum is also fixed on the drive shaft 2 so that spindles 6 and gutters 21 with coaxial pushers.

To reduce the friction of the workpiece about the spindle, the pushers 22 are equipped with catchers 25 installed in the bearing assemblies. The forming tool 26 is fixed in the instrument stand 27 located between the reels 3 and 5. During the operation of the machine, the spindle 5 and the loading 3 drums together with the loading mechanisms 4 constantly rotate at the same speed. The blanks with the ends preheated to the forging temperature are alternately fed into the grooves 21 of the rotating feed drum 3.

At the moment the blank is fed into the next loading mechanism, the pusher 22 is in the extreme left position. When the drum 3 is rotated, the finger 23, pushed by its roller 24, will enter the internal cavity of the sector fork 17.

Finger adjacent pusher due to the difference between the length of the arc. L, sector fork and circumferential distance L; will be out of contact with the sector fork. When the drum 3 rotates at a certain angle, i.e., when the workpiece enters the process loading zone, the pneumatic cylinder 15 turns on, which moves the sector fork 17 and the pushing device 22 which is in contact with it to the right along the chute 21 The workpiece is set in the spindle 6 until it stops. The locking device 22 is in the extreme right position until the workpiece is clamped in the spindle, after which the pushers move to their original position.

In order to ensure that the finger 22 is inserted into the internal cavity of the sector plug 17, the latter is made with an intake part. Clamped in the spindle, the workpiece continues to move along with the drum 5 around the circumference, simultaneously rotating about its axis, and encounters a fixedly fixed forming tool 26. The heated end of the workpiece during the process of sliding the slip deforms from its original to the final shape. .

The proposed machine allows you to expand the range of the rolled parts, providing products with a length greater than the diameter of the workpiece in 4-

8 times. - Formula of invention

A machine for rolling a tubular billet containing a frame, a shaft with a drive mounted on it, two axially mounted on a shaft of a drum, on one of which there are loading mechanisms having pushers with fingers, and on the other spindles, of which there are So that, in order to expand the technological capabilities, the loading mechanisms are equipped with a driving sector fork, the arc length of which is less than the circumferential distance between adjacent 1 and positions, and the fingers of the pushers are placed in the cavity 9 of the CLI.

Sources of information taken into account in the examination

1. The author's certificate of the USSR 526424, cl. B 21 D 51/02, 1974.

2. USSR author's certificate number 312656, cl. B 21 D 45/00, 1969.

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