SU1207583A1 - Feeding roll - Google Patents

Description

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The invention relates to the field of mass production and can be used in devices for feeding long material to a processing machine, 5

The purpose of the invention is to expand technological capabilities by providing automatic adjustment of the stiffness of the feed roll by providing the stiffness adjustment mechanism with spring-loaded pushers with wedge surfaces.

The drawing shows schematically the feed roll, the feed material and the pressure roll.

The feed roller contains a shaft 1, a polp case 2, located between imt iti elastic elements, imprinted in the form of a cylinder 3. On the shaft 1 are mounted with the sleeve 4 with a conical

abnormal surface Between bushings

4 and cylinder 3 are crackers

5c conical inner surface. In the center of the shaft 1 between BTynKaNH-i 4 are mounted conical pushers 6, having the ability to move in the radial direction. Pushers 6 are in contact with

the inner surface of the housing 2

at the expense of springs 7, and a wedge surface with end surfaces of sleeves 4. Crackers 5 move relative to shaft 1 when grinding nuts 8 and springs 9 placed between sleeve 20

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kami 4 and nuts 8. Podtavae ttPi material 10, having, for example, the projections of the Ai holes B, is placed between the housing 2 and the pressure roller 11. The device operates as follows

in a way.

When local pressure is applied to the outer surface of the housing 2, the housing deforms and the pushers 6 in contact with it move. Through the wedge surface. The pushers 6 are moved by the sleeves 4, while the wedge surface of the sleeves 4 interacts with the conical surface of the crackers 5, which move radially relative to the shaft I and release the elastic elements 3. The stiffness of the roll decreases. The roll deformation occurs until the magnitude of the local pressure acting on the outer surface of the housing 2 is balanced by the elastic force of the roll and the pressure bar 1202083 .2

9. By moving the nuts 8 along the shaft 1, the stiffness of the springs 9 and thereby the stiffness of the roll is changed. When the local pressure is removed from the sleeve 4, the crackers 5 and the pushers 6 return to their initial position under the action of the springs 7 and 9.

A change in local pressure — to the surface of the roll occurs, for example, when a material is fed that has rows of protrusions A, openings B, and other deviations from the plane, as well as when there are different grooves on the material.

In case of contact with the surface of the roll, a number of projections A, due to a decrease in the contact area, increase the contact pressure, which leads to the smth of the surface of the part and its rejection. Prevention of this phenomenon is possible by reducing the hardness of the roll. A decrease in stiffness leads to its additional deformation, an increase in the contact area with the material and the stabilization of contact pressures at a certain level, which is necessary to create the required tensile force, but not causing irreversible plastic deformation of the surface of the part. After the protrusions pass through the contact zone, the swath restores its original dimensions.

When the roll makes contact with a number of holes B, the area of contact of the roll with the material also decreases, the contact pressures increase, and plastic deformation occurs (especially when applying easily deformable material from copper and aluminum alloys). In this case, a marriage of the details also occurs.

To ensure that such materials are supplied, the roller can automatically adjust the stiffness so that the magnitude of the contact pressure on the material is constant. The minimum stiffness of the roll in the example shown corresponds to the projections A, the next level of stiffness is the holes B, the maximum stiffness of the roll corresponds to the smooth surface of the material without holes.

The constant value of the contact pressure on the material surface on the rolls side ensures a constant feed force, prevents the material from slipping over the roll surface and slipping.

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Compiled by V.Eroshkin Editor O. Kolesnikova Tehred A. Boyko

Order 92/9 Circulation 783 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch ShSh Patent, Uzhgorod, Proektna St., 4

Proofreader L.Shshnpenko

Claims (1)

FEEDING SHAFT, comprising a shaft installed in a hollow housing, an elastic element mounted between the shaft and the housing, a stiffness adjustment mechanism made in the form of two bushings with a conical outer surface mounted on the shaft with the ability to move along it, and crackers with a conical inner surface mounted on a circle on each of the bushings with the possibility of interaction of the conical inner surface with the outer surface of the bushings, and the outer surface with an elastic element, characterized in that, in order to expand technological capabilities by providing automatic adjustment of the stiffness of the feed roll, it is equipped with a spring-loaded pusher with wedge-shaped side surfaces installed; between the bushings with the possibility of interaction with the housing, the bushings are axially spring loaded, and the end surfaces are made in the form corresponding to the wedge surfaces of the pushers, and the elastic element is made integral. SU „.1207583