SU965544A1

SU965544A1 - Straightening machine roller

Info

Publication number: SU965544A1
Application number: SU813294427A
Authority: SU
Inventors: Михаил Васильевич Демаков; Леонид Леонидович Ситников; Юрий Маркович Стерин; Валерий Михайлович Грабарник; Виталий Федорович Игошин; Юрий Иванович Пролубщиков
Original assignee: Уральский научно-исследовательский институт трубной промышленности
Priority date: 1981-04-03
Filing date: 1981-04-03
Publication date: 1982-10-15

Description

(54) РОЛИК ПРАВИЛЬНОЙ МАШИНЫ(54) ROLLER OF THE RIGHT MACHINE

1one

Изобретение относитс к устройствам дл обработки металлов давлением и может быть использовано дл правки тонкостенных труб и труб с покрыти ми.The invention relates to a device for the treatment of metals by pressure and can be used for straightening thin-walled pipes and pipes with coatings.

Известен ролик правильной машины, содержащий втулку с бандажом из эластичного материала, установленную на валу машины посредством шпоночного соединени . В качестве эластичного материала могут быть использованы .резина или полиуретан 1.A roller of a straightening machine is known, comprising a sleeve with a bandage of elastic material mounted on the shaft of the machine by means of a keyed joint. As an elastic material can be used. Rubber or polyurethane 1.

Недостатком ролика вл етс невысока стойкость эластичного бандажа. Это св зано с тем, что при захвате переднего конца заготовки роликами их скорость меньше скорости заготовки. В результате разности скоростей и усили изгиба.заготовки происходит внедрение острого конца заготовки в эластичную поверхность ролика, что приводит к интенсивному износу и вырывам рабочей поверхности эластичного бандажа, а следовательно, снижает качество правки.The disadvantage of the roller is the low resistance of the elastic band. This is due to the fact that when the front end of the workpiece is gripped by rollers, their speed is less than the speed of the workpiece. As a result of the speed difference and the force of bending. The blank penetrates the sharp end of the workpiece into the elastic surface of the roller, which leads to intensive wear and tearing of the working surface of the elastic bandage, and therefore reduces the quality of the dressing.

Цель изобретени - улучшение качества правки путем повышени стойкости эластичного покрыти ролика.The purpose of the invention is to improve the quality of editing by increasing the resistance of the elastic coating of the roller.

По.ставленна цель достигаетс тем, что шпоночнь й паз втулки ролика превышаетThe goal is achieved by the fact that the groove of the roller sleeve exceeds

ширину шпонки на величину, определ емую из соотношени key width by the value determined from the ratio

0,5-0,55, Гдагх , 0.5-0.55, Gdagh,

где А - разность размеров. шири,ны шпоночного паза втулки ролика и ширины шпонки;where A is the size difference. width, we keyway roller sleeve and key width;

D -диаметр ролика; fjn jj-максимальна стрела :Прогиба заготовки .D - diameter roller; fjn jj-max boom: Workpiece deflection.

10ten

При этом втулка ролика подпружинена к шпонке со стороны, противоположной направлению заготовки. .In this case, the roller sleeve is spring-loaded to the key from the side opposite to the direction of the workpiece. .

На фиг, 1. изображен ролик, общий вид; 15 на фиг. 2 - вид А на фиг. 1; йа фиг. 3 - схема установки роликов в машине.Fig, 1. shows the video, general view; 15 in FIG. 2 is a view A of FIG. one; ya fig. 3 - installation diagram of the rollers in the car.

Ролик включает металлическую втулку 1 с эластичным бандажом 2. Втулка насажена на приводной вал 3 со шпонкой 4.The roller includes a metal sleeve 1 with an elastic bandage 2. The sleeve is mounted on the drive shaft 3 with the key 4.

Шпоночный паз во втулке 1 превышает The keyway in the sleeve 1 exceeds

Claims

20 key width 4 by sizeD. Spring 5 is fixed on sleeve 1, which is rigidly connected at one end with drive shaft 3 by means of screw 6 and pivotally through pin 7 with sleeve 1. Spring serves for returning the roller to its original position on the drive track. The video works as follows. The roller is rotated from the drive shaft 3 via key 4. The rollers rotate at an angular speed (L). In the modulator (the contact of the workpiece (pipe) 8 with the elastic band 2 rollers), the axial component of the roller speed is less than the speed of the workpiece. Therefore, the metal sleeve 1 with the elastic band 2 at first moment turns away from the effect of the pipe relative to the shaft 3 due to the gap D in the slot groove The size of the gap L is chosen so that the free rotation of the roller ends at the pipe’s exit from it. With further rotation the roller is rotated from the drive shaft 3. After the workpiece 8 stops contacting the roller ohm, the spring 5 returns the roller to its original position on the shaft 3. The gap L is determined as follows: At the time of the Clamp of the workpiece 8, the roller is displaced relative to the axis of the edit by the value f, and therefore the contact of the workpiece 8 with the surface of the roller occurs at point B, the coordinate which is determined by the angle At this point, the speed of the workpiece is p (and the speed of the roller V can be decomposed into two components: axial (horizontal) VBP. and vertical Uwe. The horizontal (axial) component of the velocity is (if), (1) The difference in the speed of the workpiece and the axial component in; respectively, is equal to f (D. Consequently, the Maximum value of the difference in the speeds of the workpiece and roller (.) Comes from the initial moment of contact of the workpiece with Roller. As it turns, this difference decreases and becomes zero at the output. The free motion of the roller is determined by the formula: D | arccos (l-. where d is the diameter of the drive shaft; D is the diameter of the roller; f is the maximum boom of the workpiece deflection. Considering that the contact angle blanks with a roller does not exceed 22 °, you can simplify the formula D d. Transform the formula (3), get the following ratio 7.:) where the value of d is accepted constant for the correct machines and is 0.5-0.55. dependence 0.5-0.55, (5) HO-Gtah based on which the free-wheeling of the roller is determined. The roller was tested on the correct machine. The SKUPFL polyurethane was used as an elastic band. For comparison, two types of rollers were tested in the machine: constructions with a free stroke A 10 mm and usual ones with a rigid mounting on the shaft. Editing exposed pipes of different diameters with untreated ends. Tests have shown that when operating for seven days, the rollers of the proposed construction did not have visible signs of wear of the elastic band while the known rollers had severe damage to the working surface. The economic effect is 20-25 thousand rubles. in year. Claims of a roller of a straightening machine comprising a sleeve with a band of elastic material mounted on the shaft of the machine by means of a keyed joint, characterized in that, in order to improve the quality of the straightening, the keyway of the roller sleeve is wider than the key 0.5 -0.55, Ll Tshchad where D - the difference in size of the width of the key groove of the roller sleeve and the width of the key; D is the diameter of the roller; fmeji- maximum boom deflection of the workpiece, while the roller sleeve is spring-loaded to the key on the side opposite to the direction of the workpiece. Sources of information taken into account in the examination 1. Semenenko Yu. L. Finishing profiles and pipes by pressure. M „Metallurgists,. 1972, p. 160-163, fig. 78, D (prototype).