SU1214274A1 - Machine for bending tubes ,particularly, coil strands - Google Patents

Description

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The invention relates to mechanical engineering, in particular, to equipment for pressure treatment of tubular blanks, and can be applied in various fields both for bending pipes of various radii and bending angles up to 180 °, and for bending coils of pipes of small diameters.

The purpose of the invention is to increase the production rate of coils on pipe bending machines, due to automation, are flexible, taking into account the angle of spring.

FIG. 1 shows a machine, a general view; in fig. 2 - the same, with intermediate positions of the basic mechanisms, the plan; in fig. 3 - the same, side view; in fig. 4 is a diagram of the adjustment of the stalk transfer.

The pipe bending machine comprises a frame 1 provided with an axis 2 rigidly connected with a bending template 3. Axle 2 is rotatably mounted with a gear 4, which interacts with the rack 5 and the drive cylinder 6. The gear 6 through the axis 7 is eccentrically connected It is equipped with a rotating part 8 on which the carriage 9 with roller holder 10 being moved by a screw gear, contains a block of rolling roller 11 displaced relative to the axis of the template 3 and calibrating roller 12 installed along the axis of the template 3. Roller holder 10 is set to alazka carriage 9 with the possibility of displacement of the cylinder 13 of the rolling roller 11 to the axis of the template 3. To limit the angle of rotation of the rollers 11 and 12 on the axis of the rail 5, a screw 14 is installed. On the base 1, the clamping device 15 is rigidly engaged for movement by a screw transmission or a diaphragm cylinder 16 clamping prism 17. On the door of the fixed platform 18, adjustable in height and width. The template 3 is equipped with two limit switches 19 interacting with the cylinder 13 when the roller block 11 and 12 are rotated.

The lash guide 20, consisting of a bearing housing 21, in which a tubular rod 22 with a keyway is coaxially fixed, mounted along the feed axis of the workpiece and connected through a sliding key (conventionally not until 212742

Zano) with an L-shaped bracket 23, on which the U-shaped bar 24 is fixed to the cantilever. The bracket is mounted for movement along the bar 22 by a fork 25 of the telescopic cylinder 26; The gear 22 also has a gear 27 of a rack and pinion gear from a cylinder 28 and two stroke limiter 29 and 30.

10 The pipe bending machine operates as follows.

In the initial position, in front of the flexible diaphragm cylinder 16, it takes the prism 17 away from the template 3, the pressure is supplied to the rod end of the cylinder 13 and the calibrating roller 12 co) is displaced with the template axis. Adjustment of the machine to the desired bending radius is performed using a replaceable template.

20 3 and by adjusting the position of the unit pojmKOB 11 and 12, and the prisms 17 by the respective screw gears.

When bending single-joint pipes in commissioning mode, the transferor

25 lash 20 is removed, the workpiece is fed through the streams of the clamping prism 17, rollers 11, 12 and template 3 to the required size, cylinder 16 clamps the workpiece between the prism 17 and template 3. Screw 14 is installed along a ruler (conventionally not shown) to the desired bend angle taking into account the angle of spring pipe. After the cylinder 6 is turned on, the rail 5 rotates the gear unit connected to the rod.

 4, the rotary part 8, crimping rollers 11 and 12 of the pipe on the pattern 3 at the required angle. /

After turning on the return code of cylinder 6, the roller assembly 11 and 12 return to their original position and fortify the part with the diaphragm cylinder 9. To remove the part from the creek of template 3, the turning part 8 rotates about axis 7

 and rollers 11 and 12 are retracted from the pattern.

For bending the whip of the coils, the transfer lash 20 is installed, with its bearing housing 21

thirty

40

50

move to align the feed axis

blanks with the axis of the rod 22 and fasten to the guide 15. The stroke limiters 29 and 30 are set using the ruler bar, the required dimensions are determined (FIG. 4) by the formulas

L, i (A + B) + Hf, + R L, - A - Hn - R (1 +),

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de А and В - constant dimensions of the machine;

R is the bend radius; П - length of straight sections

whip; T - 3.14 - constant length

circle.

Bending of the whip is done automatically. The workpiece is fed through the tubular bar 22 to a dimension from the axis of the template Lj Hp + + R (1 - "- TG).

The diaphragm cylinder 16 presses the workpiece with the prism 17 to the template 3, the cylinder 6 is turned on and the rollers 11 and 12 press the knee of the whip along the template 3 at an angle of 180 ° + 0, where Y. - the angle of the whip spring; in this case, the bent end enters the groove of the G-shaped bracket 23. At the end of the rotation, the cam 12 of the roller presses the limit switch 19, the pressure is fed into the rodless cavity of the cylinder 13, the rolling roller 11 takes the place of the calibrating roller 12 and cylinder 6 reverses the roller assembly. During rotation, the cam of the calibrating roller 11 presses the second limit switch 19, the pressure is supplied to the rod end of the cylinder 13, and finally

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the position of the block of rollers, the rollers occupy the initial position. The prism 17 frees the workpieces with the aid of a dalndr 16 and a U-shaped bar, 24 5 together with a whip from position I

moves the telescopic cylinder 26 to position J, the limit switch of the stop 29 is activated, the cylinder 28 is turned on, and the rack-10-gear mechanism rotates the rod 22 of the L-shaped bracket 23 by 180 ° by setting the U-shaped bar 24 together with the lash in the position Sh, t5 lay the whip on the platform 18. In this position, the workpiece is clamped and after the consecutive reverse actuation of the cylinders 26 and 28 of the U-shaped strap 24 through 3. 20, the U / position is returned to the position. Cylinder b is turned on and the gsgles are repeated until the whip has been completely manufactured.

The proposed machine allows 25 not only high-quality bending of one-knee pipes, but also high-quality bending of coils taking into account the angle of spring when each knee is bent in automatic mode, which allows an increase in the load of the machine and increase

lich performance.

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Composed: I. Kovrigina Editor M.Tovtin Tehred T.Dubinchak

823/14. Circulation 783 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, the city of Uzhgorod, 4 Proektna St.

Fyg.

Proofreader S. Shekmar

Claims (1)

MACHINE FOR PIPE BENDING PREFERREDLY TYPE OF LATCHES OF THE COILS, containing a bed with a drive mounted on it, a bending template, a clamping device, as well as a rotary section with a movable carriage equipped with a roller block, characterized in that, in order to increase productivity, it is equipped with a lash changer, made in the form of a L-shaped bracket with a U-shaped bar fixed on its console, a tubular rod with a keyway and a telescopic power cylinder with a fork, while the bracket is mounted on a tube the rod with the possibility of moving along its axis and interacting with the fork of the telescopic power cylinder, the tubular rod is mounted on the housing of the clamping device along the feed axis of the workpiece and is equipped with a rotation drive around its axis, while the roller block on the carriage is mounted with the possibility of movement relative to it and equipped with a drive of the specified movement in the form of an individual power cylinder, and the rotary section is equipped with a composite platform,. established with the possibility of regulating its position in height and changing the distance between its parts in the plan.