CS230264B1 - Three-cylinder short tube straightener - Google Patents

Description

The invention solves a three-cylinder short tube straightener with a small to medium wall thickness by rotary rolling between the three drive rollers.

In the field of forming machines, for the same purposes of straightening round bars or tubes, machine equations using the principle of rotary straightening with fixed setting rollers for a certain diameter of the straightened material are used. However, when using these machines, the smallest length of the material being equal is limited, and any change in diameter requires adjustment of the machine. In addition, these devices are complex and expensive. Their application is fully usable in large-capacity lines where equal series of equal diameters or lengths are required. Straightening of short tubes is problematic in other mentioned machines, especially their introduction.

For straightening tubes of regular or even unequal lengths and diameters with a thin to medium wall thickness, a straightening machine according to the present invention is used, the principle being that a short, equal tube is placed on the gap between two straightening rollers located in the inner space of the outer of the straightening cylinder, while rotating the pressing surface with its inner surface onto the short straight pipe.

The use of this system allows straightening of tubes of short unequal lengths as well as diameters with certain positive and negative tolerances without the need to adjust the machine. The whole system is very simple in construction.

The attached drawings show a three-cylinder straightener of short tubes, where in FIG. 1 is a front view and FIG. 2 side view.

The straightener consists of the following main parts: a frame 6 in which the inner straightening rollers 2, the outer straightening rollers 3 and the same tube 1 are housed. The outer straightening rollers 3 are provided at both ends with bearing bodies 4 moving vertically in the buckets 5 depending on the movement of the hydraulic motors 7 (only one end of the straightening cylinder is shown in FIGS. 1 and 2).

The inner straightening rollers 2 are supported at their ends in bearings firmly connected to the frame 6. The cylinders are located inside the outer straightening roller 3. A short straight pipe 1 is inserted into the gap of the rollers 2, 3. equal trutoke 1 and the whole system rotates. All straightening rollers are driven by a common pre-230264 water electric motor - not marked in the pictures - suspended on a common frame of the outer straightening roller 3, which is driven by a double chain transmission

8th

The inner straightening rollers 2 are driven from a common geared electric motor via a hinged shaft 9, a gearing 10 and a gear 11 (Fig. 2). The whole assembly shall be driven in such a way that their velocity vectors are the same at the point of contact of the straight pipe and any straight cylinder. The hydraulic motors 7 are driven by the hydraulic oil pressure from the hydraulic power unit HA (Fig. 1). The pressure sensor 12 controls the magnitude of the contact force given by the hydraulic oil pressure, which controls the supply of the pressure oil under the piston of the foydromotors electrohydraulically.

7th

The described three-cylinder straightening system can be used in manufacturing processes where it is necessary to repeatedly align short metal pipes of uneven diameter or thick walls, for example cathode supports in the electrolytic metal production process.

Claims (1)

SUBJECT A three-cylinder short tube straightener, characterized in that the short straight tube (1) located in the gap between the inner inner straightening rollers (2) is placed together with the inner straightening rollers (2) in the inner space of the larger straightening roller (3). At the ends, the bearing bodies (4) are mounted in the guides (5).