SU1411071A1 - Arrangement for spatial bending of tubular billets - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used in devices for multi-track spatial bending of pipes I by the method of pushing a pipe through: a flexible unit. The goal is to increase the reliability of work and improve the quality of bent products. The device contains two successively placed bending units (PG). The first PG includes support and guide rollers () and a support with bending R. The second PG contains rotary deflecting plates. After the pipe is installed on the mandrel, its front end is fed to the first PG and is bent while continuously moving the bending R. Then the deflecting plates bend the bent portion in a different plane without distorting the pipe section. With the help of the support and guides P throughout the whole bending process, a reliable base is ensured even under vibration loads. 1 GoP, f-ly, 8 ill. with (L

Description

The invention relates to the processing of metals by pressure and can be used in devices for multi-column spatial bending of pipes by pushing a pipe through a bending unit.

The purpose of the invention is to increase the reliability of work and improve the quality of the bent products.

Fig, 1 shows a device, front view; Fig 2 is the same, top view; FIG. 3 is a diagram of a first bending unit with cams; Fig. 4 shows the operation of the rollers of the first bending unit; FIG. 5 is a view A of FIG. 4; Fig, 6 is a diagram of the second bending unit; FIG. 7 is a view B of FIG. 6; FIG. 8 is a view B of FIG. 1,

The device contains a slider 2 movable in the longitudinal direction mounted on the base 1 and fixedly fixed, equipped with a screw pair 3 of the mandrel 4, the screw of which is connected to the end of the mandrel A, On the mandrel 4 is worn the bushing pusher 5 of the feed unit, the fastening elements of which are located on slider 2 „

The device also contains successively placed on the basis of 1 bending unit: the first of which includes the supporting 8 mounted on parallel vertical axes 6 and 7 with the possibility of free rotation and 9 guide rollers, super- and I-port with bending rollers 11, mounted on axes x 12, parallel axes 6 and 7. Rollers 8.9 and 11 are made with a profiled working surface. The second node of the bend includes deflecting plates 13, installed on horizontal axes 14,: 11 plates are connected with levers 15 that carry an eccentric on the free arm. 16 to adjust their rotation,

In the lower part of the slider 2, the cams 17 are mounted, which perform the functions of copiers in adjusting the movements of the caliper 10, interacting with the roller 18.

The deflecting plates 13 are also provided with copier elements with a cyclogram of bends in a plane perpendicular to the bends of the first bending unit, made in the form of cams 19. The device also contains a hydraulic cylinder 20, the stem of which is connected directly to the slider 2, through the latter with a pushing sleeve

P

five

0 5

about q d

Q

five

Lem 5, and through cams 17 and 19 with 10 bending rollers 11 and with deflecting plates 13 fixed on the support, respectively,

In order to more fully automate the bending process, the proposed device is equipped with a hopper 21 installed in the immediate vicinity of the device, a pnavmo cylinder 22 for pushing the tubular billet 23 onto the mandrel 4, a hand manipulator 24 to remove the finished products into the container and the chain 25 connected to the bunker 21.

The device works as follows.

From the bunker 21 of the tubular billet 23 enters the guide 25, with which the pneumatic cylinder 22 pushes onto the mandrel 4, pre-adjusted in length according to the length of the blank 23, while the latter is pushed onto the mandrel 4 until it stops in the end flange of the bush- pusher 5, concentric installed on the mandrel 4, after installing the tubular billet 23 on the mandrel 4 in the initial position of the slider 2 due to the longitudinal movement reported to it by the rod of the hydraulic cylinder 20, creates a pushing force (shear) by the pushing sleeve 5 of the billet 23 from the mandrel 4 Slide the mandrel 4 to the free end of the workpiece 23 is brought into contact with the support rollers 8 and then with the guide rollers 9, which, freely rotating in the same plane with the workpiece 23 pushed into the gap between them, support the base 4 given to it During the entire cycle of the working feed, after the passage of the support 8 and guide rollers 9 of the tubular rollers, the workpiece 23 encounters bending rollers 11 that are perpendicular to its longitudinal axis. The bending rollers 11 are driven by the cam I7 and the roller I8 rollers 11, together with the supporting caliper 10, driving number 1 by the hydraulic cylinder 20 from the cams 17, bending rollers 11 are pressed to the outer surface of the pipe being bent and, being an obstacle in the area of its straight feed by the continuous pushing of the workpiece, create significant bending forces with adjustable

3.4

in a wide range of bending radius in accordance with a given cyclogram of bends "

Further, in the feed direction, the horizontally bent end of the workpiece 23 comes into contact with the deflecting plates 13, which, using eccentrics 16, set the required angle of rotation around the axes 14. Since the deflecting plates 13 are also connected by means of cams 19 to the hydraulic cylinder 20, when they come into contact with the tubular billet 23. they carry out a force reversal of the curved end, as a result of which the tubular billet 23 is already bending in a vertical plane, i.e. in a plane perpendicular to the previous one The bending of the bend, carried out with the help of bending rollers 11 of the first bending unit.

The presence of the second bending roller 11 and the second plate 13 allows bending with a curvature of another sign.

Curved in two different planes with a predetermined number of bends, the blank 23, turned into a finished product, such as a bicycle handlebar, is gripped by a manipulator 24 and removed to a container of finished products (not shown). The slider 2 with the bushing pusher 5, the caliper 10 with the bending rollers and the deflecting plates 13 to the end of the bending pipes automatically return to their original position to install the following workpiece, which leaves the bunker 21 on the guide 25 simultaneously with the return of the bending assemblies to the initial position.

The force pushing of the tubular billet through the bending mechanisms is solved by more economical and more efficient construction tools, as a result of which the accuracy of the base of the bent billet is maintained throughout the cycle, even under vibration and other experimental loads, often arising under the conditions of production.

The proposed device is also characterized by high performance, since all bends are made during the movement of the workpiece without stopping during the transition from bending to gib and when returning the slider with sleeve 1101

pusher to its original position, which significantly reduces the overall technological time of the process are flexible. The invention also provides high economics of using common for the main functional elements of the power drive and high quality of finished products due to a significant decrease in ovalization in places of bends. , I

The use of the invention in the national economy, in particular in the cycle structure for the production of bicycle handlebars, will allow to obtain a significant economic effect by installing it in an automatic line.

20

Claims (2)

1. An apparatus for spatial bending of billet containing successively installed on the basis of bending assemblies, the first of which includes bending and support rollers with a profiled working surface mounted on parallel axes with the possibility of free rotation, and at least one power cylinder so that, in order to increase the reliability of work and to improve the quality of the bent products, it is equipped with a billet feed unit made in the form of a pushing sleeve, a mandrel with its mechanism three-way displacement, placed from the side of supply of the workpiece, the first bending unit equipped with axles, parallel axes of existing rollers, a pair of roller guides, additional support and bending rollers and a support for bending rollers, mounted with the ability to move perpendicular to the axis of the mandrel, the second bending unit is made in the form of deflecting plates mounted to be rotated around axes perpendicular to the axis of the rollers of the first assembly, and the ram cylinder is associated with the caliper, pushing sleeve and axles of the deflector plates. 2. The device according to claim 1, characterized in that the mechanism for adjusting the movement of the mandrel is made in the form of a screw pair, the screw of which is installed on the end of the mandrel. 5 23 Yu IB / 3/7  one. N r Zde . 0it3.2 / 5/7 LA   j g / j ww M; s tflU8.J / 9 17 /BUT 12 ;/ 6873 Figm View A noSepHymo FIG 6 J9 2 sixteen Fie.8