SU971539A1 - Stand with multiple roll pass - Google Patents

Description

(54) CLUTCH WITH MULTIWAVEL CALIBER

one

The invention relates to the field of metallurgy, in particular to equipment for metal forming.

A cage with a multi-roll caliber is known, including deforming rolls mounted on axles mounted on rotary pillows set in motion by hydrocylspine providing a quick change in the relative position of the deforming rolls 1.

The disadvantage of this stand is its structural complexity and low rigidity of the caliber.

Closest to the invention by technical essence is a cage with a multi-roll caliber, containing deforming rolls mounted on axles mounted in chambers that are interconnected by popario bars with the possibility of axial movement relative to each other 2.

A disadvantage of the known stand is the low efficiency of the use of the stand due to considerable costs.

time to change the relative position of the defocusing rolls when changing the size of the caliber, associated with the need to adjust the position of the nuts and the number of rolls.

The aim of the invention is to increase the efficiency of use of the cells by reducing the time to change the relative position of the rolls when the scientific research institute size changes.

ten

The goal is achieved by the fact that in a cage with a multi-roll caliber, containing deforming rolls, mounted on axles mounted in supports, which are interconnected in pairs of rods 1 mn

ts can be axially displaced relative to each other; the rods are made of an alloy with a memory effect, mainly nitinoles, j-and equipped with heaters.

The diagram shows a four-roll KPT, general view.

Claims (2)

The deforming rolls 1 are mounted on the axis x 2 by means of bearings (HCS-I are shown). Each axis 2 is rigidly connected at one end with support 3. In this case, axis 2 can be made integral with support 3, the other end of each axis 2 is adjacent to adjacent support 3 by placing it in hole 4, made in this support 3. All supports 3 they are connected between each other in pairs by rods 5. Kazgoda rod 5 is connected with one end to a support 3 rigidly with the help of a thread, and with its other end to another end {Sh1 support 3 with the possibility of axial displacement and fixed to it by a nut 6. Into a hole 4 springs 7 can be placed, which act with some force on axes 2 and tend to push apart adjacent supports 3. Pairs 7 of a gauge construction can be marked out and directly between supports 3. Rods 5 are made of a material with a shape memory effect, for example, nitinol, an alloy of 50% nickel and 50% titanium . The production technology of rods 5 from nitinol is as follows: the cast or plastically deformed billet is cooled to, then deformed plastically with a sieve of at least 2.5-3% in the direction of the geometric axis of the future rod 5, After that, machining is performed to the required dimensions, B the rods 5 have holes 8 in which the heaters 9 are installed, connected to the current sources by the conductors 10. The heaters 9 can be of a different design and, after being installed, are poured outside the rods 5. The cage is installed in the housing by 1) epleni. supports 3. The cage works as follows. The deforming rollers 1 are mounted relative to each other at a distance corresponding to the size of the gauge using nuts 6. This is due to the fact that during the rotation of the nuts 6 there is a mutual displacement of the supports 3 and the axes 2 on which the deforming rollers 1 are installed. metal deformation forces from rolls 1 are transmitted to axle 2, and then to rods 5 and nuts 6. Thus, these forces are closed in the system of supports 3 and shtang B. For a rapid increase in the distance between the rollers 1, we must heat the rods 5 vsolnedyee and nitinol to 1OO200 C with n 1grevatel 9. When heating rods 5 to the specified temperature. tours their length increases by 1-2%. In the range of these heating temperatures, the elongation of the rods 5 will be the same, i.e. fixed. When heated, the rod 5 can not increase, and reduce their length. To do this, when making a billet from an oshav with a shape memory effect in a cold cpcTosonffl, it should not be compressed, but stretched. When using such rods, the size of the caliber will decrease. When turning off the current in the network of heaters 9, the rod 5 is cooled and the razkavry, which were when setting the dimensions of the caliber, cooled. Thus, the proposed stand allows the caliber to be quickly rebuilt into one of two fixed structures, i.e. increase or decrease the size of the stand gauge, which, in turn, improves the efficiency of the use of the stand when drawing in rolling. When drawing, for example, it is possible to clamp the end of the wire without sharpness by increasing the size of the gauge and then bringing it to the desired state. This will significantly increase the productivity of the equipment, since the island takes up a lot of the hold and, especially when dragging pieces of lengthless length, for example, rods. In addition, the stand can be used to produce a periodic profile by drawing and rolling. This expands the range of products, which also increases the efficiency of its use. In comparison with other known cells, we offer constructive simplicity and greater rigidity of the caliber due to the small number of details. Claims with a multiscall caliber containing deformed rolls mounted on axles mounted in supports that are interconnected in pairs by rods with the possibility of axial movement relative to each other, characterized in that, in order to increase the efficiency of using the stand reducing the time to change the relative position of the rolls when changing the size of the gauge, the rods are pulped from an alloy possessing ef0 ten W (. 895 to 59715394 by the shape memory effect, mainly1. Author's certificate of nitinol, and supplied with heaters. No. 3449О4, cl. B 21 B 1 / GS, 1970, Sources of information, 2. USSR author's certificate taken into account in examination No. 7759О2, cl. B 21 B 13 / 1o, 1977.