RU2693231C1 - Preloaded crate - Google Patents

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Publication number
RU2693231C1
RU2693231C1 RU2017146268A RU2017146268A RU2693231C1 RU 2693231 C1 RU2693231 C1 RU 2693231C1 RU 2017146268 A RU2017146268 A RU 2017146268A RU 2017146268 A RU2017146268 A RU 2017146268A RU 2693231 C1 RU2693231 C1 RU 2693231C1
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RU
Russia
Prior art keywords
roll
rolls
pillows
work roll
cushions
Prior art date
Application number
RU2017146268A
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Russian (ru)
Inventor
Анатолий Григорьевич Кузьменко
Александр Никифорович Озерин
Евгений Константинович Голубев
Тихон Сергеевич Куркин
Иван Андреевич Путивский
Алексей Петрович Тремасов
Николай Сергеевич Сухарев
Original Assignee
Закрытое акционерное общество "ТЕХПОЛИМЕР" (ЗАО "ТЕХПОЛИМЕР")
Федеральное государственное бюджетное учреждение науки Институт синтетических полимерных материалов им. Н.С. Ениколопова Российской академии наук (ИСПМ РАН)
Общество с ограниченной ответственностью "Научно-производственное предприятие "И Н Ж М Е Т"
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Application filed by Закрытое акционерное общество "ТЕХПОЛИМЕР" (ЗАО "ТЕХПОЛИМЕР"), Федеральное государственное бюджетное учреждение науки Институт синтетических полимерных материалов им. Н.С. Ениколопова Российской академии наук (ИСПМ РАН), Общество с ограниченной ответственностью "Научно-производственное предприятие "И Н Ж М Е Т" filed Critical Закрытое акционерное общество "ТЕХПОЛИМЕР" (ЗАО "ТЕХПОЛИМЕР")
Priority to RU2017146268A priority Critical patent/RU2693231C1/en
Application granted granted Critical
Publication of RU2693231C1 publication Critical patent/RU2693231C1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B31/00Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16Adjusting or positioning rolls
    • B21B31/20Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/22Adjusting or positioning rolls by moving rolls perpendicularly to roll axis mechanically, e.g. by thrust blocks, inserts for removal
    • B21B31/30Adjusting or positioning rolls by moving rolls perpendicularly to roll axis mechanically, e.g. by thrust blocks, inserts for removal by wedges or their equivalent

Abstract

FIELD: metallurgy.
SUBSTANCE: pre-loaded stand for producing oriented material from amorphous-crystalline polymer in powder form includes first crossbar, first working roll, second working roll, working roll cushions with work roll bearings installed in them, second crossarm, power bolts tightening both cross beams. Improved accuracy of monolithic workpiece, simplification of adjustment and adjustment of stand due to that it comprises first and second spacers, placed between pillows, the first rusk and the second rusk for transfer of pressure from the second traverse to cushions, into one of the said blocks or both are additionally mounted a strain gage for measurement of contraction force. Pads may include adjusting eccentric bushings in which seats for roll bearings are made. Cylindrical rolls have ellipse shape in cross-section, ellipse parameters of both rollers are identical, shafts of rolls are connected by gear transmission ensuring equality of their angular velocities. Eccentricity of ellipses can vary from 0.01 to 5 % of size of smaller radius.
EFFECT: invention relates to processing of composite materials.
4 cl, 4 dwg

Description

The invention relates to the field of obtaining new materials and can find application in the creation of composite materials, characterized by a high set of strength properties. More specifically, the invention relates to a method for producing a material based on a reactor powder of an amorphous-crystalline polymer, for example, ultrahigh-molecular polyethylene (UHMWPE), which has enhanced strength and a number of other properties.

Methods of continuous production of monolithic billet (sheet, tape, film thread) to obtain a product for subsequent orientational drawing and hardening should combine three processes: transporting the reactor powder to the monolithization device (dosing), applying pressure (pressing) to the reactor powder and performing shearing opposite compression surfaces.

It seems that the most suitable design solution for the extrusion unit is rotating rollers (rollers) to which an external compressive load is applied and the surfaces of the rolls are shifted in the direction of rolling by changing the speed of rotation of one of them relative to the other. The rollers are connected in a rolling stand. The rolling stand is usually the first yoke, the first and second work rolls, pressing them against the second yoke. Pillows of the first work roll with radial and thrust bearings are fixed to the first traverse. Pillows of the second work roll with radial and thrust bearings are fixedly attached to the pillows of the first work roll. The second traverse is fixedly attached to the pillows of the second roll. Coupling bolts with nuts connect both traverses. Sometimes, when the direction of rolling is chosen horizontal, the first traverse is located on the basis of the rolling stand. In the vertical rolling direction, both traverses and pillow rolls can be placed on the base. Known prestressed rolling stand, containing the base, the lower and upper rolling rolls with cushions installed on the base with the possibility of self-installation, coupling hydraulic cylinders with embedded elements connecting the base with the cushions of the upper work roll, eccentric expansion mechanism of the radial movement of the upper work roll, located between the cushions upper and lower work rolls (for example, the stand design (PNK-280) of the VNIImetmash design - http://refy.ru/77/273197-konstrukciya-kleti-s-trehvalkovym-kalibrom.html). One of the features of this stand is that the eccentric expansion mechanism, installed between the lower and upper pillows, is unloaded during the rolling process from the prestressing force of the stand and prevents, though not significantly, the self-installation of the pillows. The disadvantage of the above-presented rolling stand is that the self-installation means in the mates of the pillows with the first crosshead (base) and the tie bolts are loaded with the force of the preliminary loading of the stand and the friction moments accompanying it, opposing the moments of self-installation of bearings. Considering that the prestressing force significantly exceeds the maximum rolling force, the presence of the said means of self-installation does not eliminate the distortions in the bearings and does not increase the load capacity of the stand. Another disadvantage that reduces the reliability of said stand is that the eccentric expansion mechanism is in the zone of influence of temperature, which leads to a shift in the preset settings of the process parameters.

The closest in technical essence and the achieved result to the declared stand (prototype) is a pre-stressed rolling stand containing a base, lower (first) and upper (second) work rolls, cushions of the lower (first) work roll with radial and thrust bearings, fixedly mounted on the first yoke (base), pillows of the upper (second) work roll with radial and thrust bearings, fixedly mounted on the pillows of the lower (first) work roll, upper (second) yoke, mouth fixed on the pillows of the upper (second) roll, coupling bolts with nuts and, possibly, with fixed keys, connecting the upper (second) yoke with the first traverse (base), the mechanism of radial movement of the upper (second) roll, placed in the pillows of the upper (second) ) roll and the mechanism of the axial movement of the lower (first) roll, placed in the pillows of the lower (first) roll (patent RU No. 2319562).

A feature of this cage is that the pillows, in which the bearings of the rolls are mounted, are rigidly fixed in a predetermined position and rotated at a pre-calculated angle, using the base, upper (second) crosshead and coupling bolts, which, with high precision manufacturing of all parts, allows minimum reduce mounting distortions in bearings.

The disadvantage of this stand is that it becomes much more complicated, and for some values of the working parameters it becomes impossible, the process of assembling and setting up the stand, in the process of working, the adjusted parameters often go beyond the tolerances, distortions caused by the deflection of the rolls, which reduces durability of bearings.

The technology of obtaining an oriented material from an amorphous-crystalline polymer in the form of a powder implies the addition of relative rolls to the compressive force during rolling.

The aim of the invention is to improve the accuracy of the monolithic billet (sheet, tape, film thread), simplify the design and configuration of the rolling stand and achieve the effect of relative slipping of the rolls in a simpler way.

This goal is achieved due to the fact that in a prestressed rolling stand containing a horizontal base, located on the base in the horizontal plane, the first work roll that is fixed in series to the first traverse, the first work roll with radial and thrust bearings installed in the pillows, and the spacer installed in the pillows the second work roll roller with radial and thrust bearings, second traverse, coupling bolts with nuts connecting the second traverse to the first traverse, mechanized we or means of radial movement of the second roll for approaching or moving away from the first (lower) roll and for ensuring parallelism of the roll axes, placed in one or both pillows of the second roll, and mechanisms or means of radial movement of the first roll, to ensure a given level of preloading (voltage a cage placed in one or both pillows of the first roll.

These mechanisms or means of radial movement of the rolls are made with the possibility of radial movement in two mutually perpendicular planes. Under the mechanism of radial movement means a node, mainly eccentric, allowing you to move the cushion rolls without disassembling the cage. The eccentric mechanism for radial movement towards the other roll and from it is mounted in the roll cushion (s) coaxially with the roll bearing. The eccentric mechanism for radial movement in the perpendicular direction - perpendicular to the base to eliminate non-parallelism of the axes of the rolls - mounted coaxially with the locking bolts at the junctions of the pillows of the first and second rolls. Under the means of radial movement means mainly spacers of different thickness, enclosed under the pillows of the rolls or between the pillows of the rolls. The use of spacers requires partial disassembly of the stand to change the radial displacement, therefore it is performed mainly in the process of adjusting the stand.

Additionally according to the invention, in order to ensure that the rolls surface slides relative to each other, the shape of the rolls is made ellipsoidal, and the rolls are connected by a gear transmission ensuring the equality of their angular velocities. In this case, the ellipsoids are made of the same size, and their eccentricity can vary from 0.01 to 5% of the size of the smaller radius of the ellipse. The mechanism of radial movement of the second roll is placed in the pillows of the second roll. The mechanism of the axial movement of the first roll is placed in the pillows of the first roll.

BRIEF DESCRIPTION OF GRAPHIC MATERIAL

1 shows a longitudinal section of a pre-stressed rolling stand of the prototype.

Figure 2 shows a longitudinal section of a pre-stressed rolling stands of the proposed design.

Figure 3 shows the claimed design of the rolling stand, mounted on the technological support of the machine.

Figure 4 shows the diagram of the interaction of rolls of elliptical shape.

ACCEPTED NOTES

1 - base.

2 - the first traverse.

3 - the first roll.

4 - the second roll.

5 - pillow of the first work roll.

6 - radially - thrust bearings of the first work roll.

7 - pillow of the second work roll.

8 - radial - thrust bearings of the second work roll.

9 - the second traverse.

10 - clamps in the holes of coupling bolts.

11 - coupling bolts.

12 - nuts of coupling bolts.

13 - eccentric bushings.

14 - remote pads.

15 - crackers.

16 - strain gauges.

DETAILED DESCRIPTION

A prestressed rolling mill is declared, containing a horizontal base, located on a base in a horizontal plane, successively connected to the first traverse, a first work roll installed in the pillows with radial and thrust bearings, a distance gasket installed in the pillows a second work roll with radial and thrust bearings, second traverse, coupling bolts with nuts connecting the second traverse to the first traverse, mechanisms or means of radial movement the second roll for approximation or distance from the first (lower) roll and to ensure parallelism of the axes of the rolls, placed in one or both pillows of the second roll, and mechanisms or means of radial movement of the first roll, to ensure a given level of preloading (voltage) of the cage, placed in one or both pillows of the first roll.

These mechanisms or means of radial movement of the rolls are made with the possibility of radial movement in two mutually perpendicular planes. Under the mechanism of radial movement means a node, mainly eccentric, allowing you to move the cushion rolls without disassembling the cage. The eccentric mechanism for radial movement towards the other roll and from it is mounted in the roll cushion (s) coaxially with the roll bearing.

The eccentric mechanism for radial movement in the perpendicular direction - perpendicular to the base to eliminate non-parallelism of the axes of the rolls - mounted coaxially with the locking bolts at the junctions of the pillows of the first and second rolls. By means of radial movement are meant, mainly calibrated plates of different thickness, enclosed under the pillows of the rolls or between the pillows of the rolls. The use of calibrated plates requires a partial disassembly of the stand to change the magnitude of the radial displacement, therefore it is performed mainly in the process of adjusting the stand.

Additionally, according to the invention, to ensure that the rolls surface slides relative to each other, the roll shape is cylindrical, preferably in the form of an ellipse in cross section, and the roll shafts are connected by a gear transmission ensuring their angular velocities are equal. In this case, the ellipses are made of the same size, and their eccentricity can vary from 0.01 to 5% of the size of the smaller radius of the ellipse.

The mechanism of radial movement of the eccentric type of the second roll is placed in the pillows of the second roll. The mechanism of axial movement of the first roll of eccentric type is located in the pillows of the first roll.

Pre-tense stand of the proposed design (figure 2, figure 3) is arranged as follows.

Contains the base 1, the first yoke 2 mounted on the base 1 using clamps (not shown) stationary, the first work roll 3, the second roll 4. The cushions 5 of the first work roll with radial and thrust bearings 6 are mounted on the base 1 without clamps. Pillows 7 of the second work roll with radial and thrust bearings 8 are installed on the base 1 without clamps. The second yoke 9 is installed on the base 1 after the pillows of the second work roll without locks. Between the cushions 7 of the second work roll and the second crosshead 9, crackers 15 are installed to transfer force from the second crosshead 9 onto the cushions of the second roll 7. Tightening bolts 11 with nuts 12 connect the second crosshead 9 to the first crosshead 2. Radial movement mechanism of the second roll, including eccentric sleeve 13, is placed in the pillows 5, 7 of the first and second rolls, respectively. At the same time, for a rough adjustment of the position of the second roll, a package of gaskets 14 is provided, which is installed between the pillows of the first roll and the pillows of the second roll. For fixing the position of the pillows in the holes of the coupling bolts installed clamps 10.

Additionally, according to the invention, to ensure that the rolls surface slides relative to each other, the shape of the rolls is cylindrical in the shape of an ellipse in cross section, and the rolls are connected to each other by gear transmission (not shown), ensuring the equality of their angular velocities. In this case, the ellipses are made of the same size, and their eccentricity can vary from 0.1 to 5% of the size of a smaller radius.

The stand is assembled in the following sequence: the base 1 is installed stationary in the line of the working stand or on an intermediate lodgment. Four clamps (not shown) are installed in the sockets of the base 1. The first yoke 2 is mounted on the base 1. The first roll 3 with cushions 5 and the axial movement mechanism of the first roll (not shown) is assembled and mounted on the base 1. A package of gaskets 14 is attached to the pillows 5 , while the thickness of the package is determined depending on the size of the diameter of the barrel work rolls. The second roll 4 with pillows 7 and the mechanism of radial movement of the upper roll, including eccentric sleeves 13, is assembled and attached to the pillows of the first work roll 3. Four clamps 10 are installed in slots in the pillows 7 of the second roll. On the shaft of the first roll fix the gear (not shown). The second roll 4 is oriented to the working position relative to the first roll 3, i.e. for example, until the contact of the surfaces furthest from the axis of rotation of the second roll with the surface closest to the axis of rotation of the first roll. In this position, a gear (not shown) is fixed to the shaft of the second roll 4. To one or both pillows 7 of the second roll attach one or two, respectively, rusk 15 with built-in strain gauges 16. If you use one strain gauge, then use the second cracker without a sensor.

The second yoke 9 together with the coupling bolts 11, nuts 12 are attached to the breadcrumbs 15, combining the clamps 10 with the sockets in the yoke 9. Put four clamps 10 and tighten the nuts 12 to achieve the compressive force of the pillows of the second work roll with the pillows of the first work roll exceeding rolling force. The disassembly of the cage is carried out in reverse order.

The basis for the development of the claimed device to ensure relative slippage of the rolls were the following technical solutions.

A mechanism for transmitting rotation from one shaft to another using two identical elliptical gears (for example, http://www.ngpedia.ru/id90046p1.html) or (https://konstruktor.net/podrobnee-det/my-dostigli -vysokogourovnja-kachestva.html). The gears are connected in such a way that the most distant point of one gear from its center is connected to the point of another gear that is at least remote from its center. Since in such a transfer the sum of the radii of the gears is constant, the gears are always meshed when the gears rotate. It is possible to use gears of another form, for example, such - http://nanni-ingranaggi.com/gallery.php?lang=en, it is only important that the sum of the sum of the lengths of the radii remain constant at each moment to ensure the gearing.

However, a feature of such a transmission is that with a uniform rotation of one shaft, the other shaft will rotate unevenly, then lagging in angular velocity from the first shaft, then ahead of it. If you now perform two rolls of a rolling stand of the same size in the shape of an ellipsoid and even their angular speeds between themselves, for example, using a gear, then rotating between them all the time, slippage will occur, varying in size and direction (figure 3).

By changing the parameters of the ellipse, you can get the necessary values of the rolls slippage.

In the present case, preliminary calculations clarified the area of applicability of the device. For a pre-stressed stand to obtain an oriented material from an amorphous-crystalline polymer in the form of a powder, the eccentricity must be in the range of 0.01% to 5% of the size of a smaller ellipse radius. In the future, these parameters were confirmed experimentally.

To improve the interaction of the polymer with the rollers, it is possible to apply notches on the rollers, knurling or roughness.

In the rolling stand of the proposed design, with increasing rolling effort, the distortions in the bearings decrease and, with a nominal rolling force, the distortions in the radial bearings are zero, and the load capacity of the rolling stand will be equal to the nominal load capacity of the radial bearings.

Claims (4)

1. Preloaded cage for obtaining oriented material from amorphous-crystalline polymer in powder form, containing the first cross bar, the first work roll, the second work roll, work roll cushions with work roll bearings installed in them, the second cross bar, tightening bolts tightening both cross bars , characterized in that it is provided with first and second spacers placed between the pillows, the first rusk and the second rusk, transmitting pressure from the second cross bar to the pillows, at least In one of these, a strain gauge is installed to measure the force of tension, each of the rolls is made with an ellipse-shaped cross section, whose eccentricity is 0.01-5% of the size of the smaller ellipse radius, with the same parameters of the two rolls, and the rolls are connected gear transmission, ensuring the equality of their angular velocities.
2. The cage according to claim. 1, characterized in that the clamping bolts are equipped with hydraulic nuts to regulate the force of contraction.
3. The cage according to claim. 1, characterized in that the cushions are fitted with adjusting eccentric sleeves in which the seats for roll bearings are made.
4. The crate according to claim 1, characterized in that a notch, knurling or roughness is applied to the surface of the rolls.
RU2017146268A 2017-12-27 2017-12-27 Preloaded crate RU2693231C1 (en)

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RU2693231C1 true RU2693231C1 (en) 2019-07-01

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1031544A1 (en) * 1981-11-11 1983-07-30 Колпинское отделение Всесоюзного научно-исследовательского и проектно-конструкторского института металлургического машиностроения Prestressed rolling stand
US4480452A (en) * 1982-04-08 1984-11-06 Sulzer-Escher Wyss Limited Rolling mill
SU1776472A1 (en) * 1989-09-05 1992-11-23 Zaporozh Ind Inst Mill roll support
RU2319562C2 (en) * 2006-04-28 2008-03-20 ООО Научно-производственное предприятие "Инжмет" Prestressed rolling stand

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1031544A1 (en) * 1981-11-11 1983-07-30 Колпинское отделение Всесоюзного научно-исследовательского и проектно-конструкторского института металлургического машиностроения Prestressed rolling stand
US4480452A (en) * 1982-04-08 1984-11-06 Sulzer-Escher Wyss Limited Rolling mill
SU1776472A1 (en) * 1989-09-05 1992-11-23 Zaporozh Ind Inst Mill roll support
RU2319562C2 (en) * 2006-04-28 2008-03-20 ООО Научно-производственное предприятие "Инжмет" Prestressed rolling stand

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