SU1191147A1 - Tube expander - Google Patents

Abstract

1. ROLLING FOR PIPES, containing a separator mounted in the housing with roller rollers, a conical spindle with a drive for its rotation and an axial feed mechanism of the spindle, characterized in that, in order to increase the reliability in operation, the axial feed mechanism is made in the form of installed between the rolling rollers and driven rotation of the spindle, placed evenly around the circumference around the last feed fingers, the axes of which are crossed with the axis of the spindle at an acute angle, as well as the sleeve that surrounds the fingers and is installed concentric outside of the elastic cage, rigidly connected to the body of the rolling. 2. Rolling according to claim 1, characterized in that the elastic cage is made of polyurethane. about |

Description

The invention relates to devices for flaring pipes and can be used in nuclear engineering and boiler construction, for example, when fixing pipes in tube plates used in heat exchange equipment.

FIG. 1 shows rolling, general view; in fig. 2 shows section A-A in FIG. 1 (working position); in fig. 3 is a view B in FIG. one; in fig. 4 shows a section B-B in FIG. one; in fig. 5 is a view of FIG. I; in fig. 6 is a section d-d in FIG. 5. Rolling for pipes contains a separator 2 placed in case 1, in the windows of which the feed fingers 3 are installed with the possibility of radial movement, and also the separator 4, in the protruding part of which, radially, at an angle of 120 °, grooves for rolling rollers 5 are made, the axes of which are parallel to the longitudinal axis of the tapered spindle 6.

The feed fingers 3 and the rollers 5 are in contact with the spindle 6 and are spaced apart along its length.

In addition, in the separator 4 there is a groove 7 for stopping the rolled tube 8. The feed fingers 3 are turned at an angle relative to the axis of the spindle.

The rotation angle U is chosen from the optimal condition of the dependence of the power consumption change factor (0.6; 0.8) on the spindle rotation speed (340-580 rpm) and the material of the adjacent pipe joint elements with different thickness of the tube plate (20 -60 mm) On the feed fingers 3, with the possibility of contact with them, a sleeve 9 is installed, having an oblique incision 10, which provides for the radial movement of the fingers at the time of flaring.

Along the perimeter of the split sleeve 9 there is a cylindrical holder 11, made of high-strength elastic material, such as polyurethane (grade SKU-7-85), which is used to receive radial forces from the fingers at the moment of axial movement of the spindle and ensure the contact of the system with the holder. in the process of flaring, as well as the return of the sleeve 9 to its original position at the end of each rolling cycle.

At the same time, the system of elastic cage - cutting sleeve - feeding fingers - XI-XJ

The reteno functions as an axial spindle feed mechanism.

The elastic sleeve 1 is pressed onto the sleeve 12, which is rigidly attached with screws 13 to the body 1 and to the holder 11.

The tapered spindle 6 is attached by a shank directly to a driven pneumatic or electric blade (not shown), and at the working end of the spindle, a tip 14 is fixed on the thread, designed to hold onto the spindle of the housing 1.

The device works as follows.

The protruding part of the separator 4 with

rolling rollers 5 is inserted into the flared tube 8 up to the last stop into the groove 7. A pneumatic or electric machine is activated, the spindle is rotated 6. The worker presses the spindle tail, the latter contacts the feed fingers 3. Due to the rotation of the fingers at an angle, the spindle begins to move in the direction of the rolled pipe 8, while the roller rollers 5 are in contact with the inner surface of the pipe, roll around this surface, rotate the separator 4 and flare the pipe to the degree of compaction required.

During the flaring process, the spindle carries out continuous radial movement of the fingers 3, thereby increasing

the diameter of the split sleeve 9 and the elastic sleeve 11 which is in contact with it 11. The elastic properties of the material of the sleeve 11 ensure the stability of the contact of the elements of the system that performs the functions of the spindle axial feeding mechanism and the necessary

pipe expansion force.

At the end of the pipe flaring, switching the drive changes the direction of rotation of the spindle for 1-2 revolutions of the latter, the rollers 5 and the feed fingers 3 become wedged, after which the device is freely pulled out of the flared pipe. The cycle is over.

Thus, the use of an elastic cage covering the split bushing,

in a system that performs the function of an axial feed mechanism of the spindle, greatly simplifies the design, increases the reliability of its operation, and ensures a quick changeover of the device to its initial position at the end of each flaring cycle.

3ud s

-0

P

FIG.

D

Srig. five

Aa

FIG. 6

Claims (2)

1. ROLLER FOR PIPES, comprising a separator mounted in the housing with rolling rollers, a conical spindle with a drive for its rotation and an axial feed mechanism of the spindle, characterized in that, in order to increase reliability in operation, the axial feed mechanism is designed as installed between the rolling rollers and a spindle rotation drive arranged uniformly in a circle around the last feed fingers, the axes of which are crossed with the spindle axis at an acute angle, and also covering the fingers of the split sleeve and the installed end ntrichno outside her elastic holder rigidly connected to rolling body. 2. Rolling according to π. 1, characterized in that the elastic clip is made of polyurethane. β Fig-1