SU856629A1 - Apparatus for feeding elongated material into working zone of press - Google Patents

Description

one

The invention relates to the cold treatment of metals by pressure n and can be used in devices for feeding lengthy material into the working area of a press.

A device for feeding a lengthy material into a press working area is known, comprising rolls mounted on the base of the roll, a double reversing free-wheeling clutch equipped with a brake, having a movable sprocket and a fixed sprocket connected to the drive shaft of the roller supply roller and through a connecting rod with an adjustable crank mounted on the drive shaft of the press carrying the scale of divisions. The brake is made in the form of a spring-loaded tapered bushing with dogs hinged on it, interacting with stops, connected to the housing of the coupling ..

A disadvantage of the known device is that during operation of the drive with 300 strokes per minute and more, the resulting inertial overruns are eliminated by a friction brake that is not stable in operation, which affects the accuracy of the device. Friction brake

requires qualified maintenance, consisting in the systematic adjustment of the brake, and reduces the reliability and the robustness of the device as a whole, since the service life of the friction brake is lower than the service life of the coupling. In addition, the known device causes certain difficulties in assembling and adjusting, because adjustment of the beginning of the brake opening during idling is performed blindly and it often happens that the incorrectly adjusted clutch does not provide the required feed accuracy.

The device is tuned to the specified step size using the method of pro. B and errors, for the scale readings,

20 corresponding to the crank eccentricity value, do not reflect the magnitude of the feed pitch. The variable eccentricity of the crypt is disproportionate to the variable feed step.

25 The feed pitch is proportional to the length of the arc, with the axis of the hinge connecting rod connecting to the coupling housing 1g out, and the crank eccentricity is proportional to the chord connecting the extreme points

30 of this arc.

The purpose of the invention is to improve the performance of the device, improve durability, ease of adjustment and accuracy of the feed step,

The goal is achieved by the fact that the brake is implemented in the form of interconnected by means of rollers, made on a movable sprocket and an asterisk freely mounted on the coupling housing, the stops are mounted on the coupling housing with the possibility of interaction with the torus mosaic rollers, and compression springs located between the brake sprocket and the stops.

In addition, each subsequent scale mark is plotted from the first at a distance determined by the ratio

С 2Rs-iH where R is the distance from the axis of attachment

the end of the connecting rod on the coupling housing to the axis of the drive roller shaft L - feed pitch;

d is the outer diameter of the drive roll.

FIG. 1 shows the kinematic diagram of the proposed device for feeding long material into the working area of the press; in fig. 2 is a double reverse overrunning clutch of FIG. 3 shows section A-A in FIG. 2; in fig. 4 is a view B in FIG. 3

The device for feeding long-length material into the working zone of the press contains a crank mechanism with crank 1, which is fixed on the slide 2, moved by screw 3. In the groove made in disk 4. The disk 4 is fixed on the drive shaft of the press (not shown). By moving the slider 2, the eccentricity of the crank 1 is adjusted. On the crank 1, the crank 5 is hinged, connected by the tide of the casing 6 of the dual reversing overrunning clutch. The housing 6 by means of the rollers 7 interacts with a movable asterisk 8, rigidly fixed on the shaft 9, on which the feed roller 10 is also fixed.

The asterisk 8 is connected by means of the rollers 11 to a fixed (locking) asterisk 14 fixed to the base with 12 screws 13.

The disk 4 has a fixed scale of 15 divisions, the readings of which correspond to the feed pitch, since the distance from the first (zero) to any mark on the scale is calculated by the formula;

f С 2Rsih - | -, where С is the distance of each mark

from the first (zero); R is the distance (radius) between

the axis of the shaft 9 and the axis of the hinge fastening of the connecting rod 5 on the housing 6; L - feed pitch;

d - dis1metr drive feed roll 10.

On the movable sprocket 8, the protrusion a is made; The movable casing and through rollers 16 is connected with an asterisk 17, on the case 6 are fixed stops 18, which interact with the rollers 16. Between the stops 18 and the asterisk 17 are mounted around the circumference of the spring 19. The rollers 7 are spring loaded with springs 20, and the rollers 11 and 16 with springs 21 and 22 respectively.

Device for feeding long material into the working area of the press works as follows.

When rotating the disk 4, the connecting rod 5. Communicates the body 6 rocking motion. At the time of filing, i.e. when the housing 6 is rotated clockwise, the rollers 7 are wedged, providing the movable sprocket 8, the shaft 9 and the feeding roller 10 to rotate with the housing 6. In the second half of the feed stroke, when the drive link, i.e. the casing 6 begins to rotate with deceleration, conditions occur in which the driven member (shaft 9, sweat the moving sprocket 8 and the feeding roller 10) has a greater speed than the speed of the driving link. However, the rotation of the slave link at a speed greater than the speed of the drive link is prevented by the springs 22 (the torque for compressing the springs 22 must be equal to or slightly greater than the total moment of inertia of the driven link, i.e. the shaft 9, the movable sprocket 8 and the lower arm 10).

When the movable sprocket 8 rotates relative to the housing 6, the rollers 16 are wedged, as a result of which the movable sprocket 8 begins to rotate together with the asterisk 17, and the springs of the sprocket 17 clockwise prevent the springs 22.

Thus, during the course of filing, i.e. during rotation, the housing 6 is clockwise, provided with synchronous rotation with the housing 6 of the movable sprocket 8, the shaft 9 and the feed roll 10

At idle time of the case 6, t-e. when the latter rotates counterclockwise, the fixed sprocket 14 prevents rotation of the movable sprocket 8 together with the casing 6, which by means of the rollers 11 reliably locks the pivot sprocket 8, as well as the shaft 9 and the feed roller 10 for the entire idling period. During the period of idling, the spring 22 also contributes to the reliable locking of the movable sprocket 8, which tend to turn the sprocket 17 and with it the movable sprocket 8 counterclockwise.

Claims (2)

When the housing 6 is rotated counterclockwise, the sprocket 17 is kept from joint rotation with the housing 6 by the rollers 16 and the yoke a. However, as the housing b is rotated relative to the sprocket 17, the springs 22 are compressed, and then the protrusions 18, resting against the rollers 16, wedge them up, as a result of which the sprocket 17 rotates counterclockwise under the action of the springs 22. During idle run 6 eakliniva The rollers 16 and the jump-like rotation of the asterisk 17 occur repeatedly. During further operation of the roller feed, the movement of the housing 6 is reversed, the housing 6 moves clockwise and the cycle described is repeated. Adjusting the roller feed to a predetermined step size is performed by changing the eccentricity of the crank 1 by rotating the screw 3. For setting a given feed step, combine the risk on the slider 2 with the corresponding readings on the scale 15. Formula 1: Device for feeding a long material into the press working area containing at least one water feed roller, a brake with compression and orbital springs, a dual reversing overrunning clutch comprising a housing connected through a crank with a crank, on the drive shaft of the press with the possibility of adjusting the movement and marking the scale of divisions, movable sprocket. rigidly mounted on the drive roller shaft and connected through the rollers to the housing, a fixed sprocket rigidly fixed to the base and connected by means of rollers to the movable asterisk, characterized in that, in order to improve the device performance, increase durability, ease of adjustment and accuracy feed pitch, the brake is made in the form of a cage connected to each other through a roller, made on the movable sprocket of the clutch, and an asterisk freely mounted on the clutch housing; Lena on the clutch housing to cooperate with brake rollers and compression spring is located by an asterisk brakes and stops. 2. The device according to claim 1, about tl and each so that each subsequent mark of the scale is applied from the first at a distance determined by the ratio i C - 2HI1I — where R is the distance from the axis of attachment of the end of the connecting rod on the coupling housing to drive shaft axis; L - feed pitch; d is the outer diameter of the drive roll. Sources of information taken into account in the examination 1. USSR author's certificate №247216, cl. At 21 D 43/08, 07/18/69. IS sixteen FIG. Z07., - 2120 FIG. 2