CS240498B1

CS240498B1 - The method of producing profile parts by bending

Info

Publication number: CS240498B1
Application number: CS847611A
Authority: CS
Inventors: Vladimir Cupka
Original assignee: Vladimir Cupka
Priority date: 1984-10-08
Filing date: 1984-10-08
Publication date: 1986-02-13
Also published as: CS761184A1

Abstract

Vynález sa týká oblasti výroby profilových súčiastok ohýbáním. Spůsoh výroby profilových súčiastok ohýbáním, vyznačujúci sa tým, že na ohýbaný materiál súčasne s ohybovým momentom působí na plochy kolmé k čiare ohybu tlak, ktorého výslednica je voči týmto- plochám odkloněná o uhol vačší ako 90° a menší ako 1353 a jej kolmá zložka působí smerom k vnútoirnému poloměru ohýbaného materiálu.The invention relates to the field of production of profile parts by bending. A method of producing profile parts by bending, characterized in that the bent material is simultaneously subjected to a bending moment on surfaces perpendicular to the bending line, the resultant of which is deflected by an angle greater than 90° and less than 135° relative to these surfaces, and its perpendicular component acts towards the inner radius of the bent material.

Description

BACKGROUND OF THE INVENTION The present invention relates to the field of bending bending.

A method for producing profiled parts by bending, characterized in that a pressure is applied to the bent material at the same time as the bending moment on the surfaces perpendicular to the bending line, the resultant being angled at an angle greater than 90 ° and less than 135 "and its perpendicular component acting in the direction (to the inner radius of the bent material.

FIG. 4 240498 240498

The present invention provides a method for producing profiled components where there is a potential risk of cracking in areas perpendicular to the bend line.

So far known methods of producing profile parts by bending on two supports or at one end by a bending moment or by a combination of bending moment with counterpressure advancing on the outer surface of the bent part or by a combination of bending moment with tensile or compressive stress advancing perpendicular to the bending arm or in combination with a compressive stress perpendicular to the bending line.

Each of these methods has advantages, but it does not solve the problem of elimination of cracks occurring in areas perpendicular to the bend line. Partially successful method in this sense is the method of bending the parts after their previous calibration at the point of expected crack formation.

This method of producing the profile parts is only effective if the reinforcement of the material caused by the calibration is not in itself an initiator of the cracking of its subsequent bending.

The above-mentioned drawbacks are eliminated by the method of manufacture according to the invention, characterized in that the bending material acts on the surfaces perpendicular to the bending line at the same time as the bending moment, the resultant of which is inclined at an angle greater than 90 [deg.] And less than 135 [deg.] And perpendicular to these surfaces. the component acts towards the inner radius of the bent material.

The production method of the invention is simple and allows to bend materials with a permissible minimum bending radius of no bending to the quality of the perpendicular to the bend line. The bulk of the bending blanks are prepared by shearing operations, thereby significantly reducing the ductility of the surfaces perpendicular to the bend line, resulting in 4 increase in the allowable minimum bend radius value.

To eliminate the adverse impact of reduced quality of the perpendicular to the bend line, as a result of their shearing, either mechanical treatment or annealing is currently used.

According to the process of the invention, this drawback of the prior art processes is eliminated by the directed deformation of the material on the surfaces perpendicular to the bending line caused by the pressure exerted thereon, which prevents the propagation of existing micro-cracks and new cracks. An example of manufacturing a V-shaped component according to the invention is shown schematically in the accompanying drawing.

Fig. 1 and Fig. 2 show the starting position of the bending process and in Fig. 3 and Fig. 4 the final position of the bending process.

The method of producing the profiled parts by bending with rectified deformation, which is the subject of the invention, consists of one operation.

On the blank 1 supported by the retainer 5 on the rail 3, the flexor 2 acts by the bending moment caused by the bending force F and at the same time by the anti-skid 4 by the force Fp. This results in a directed deformation of the bent material 6 on the surfaces perpendicular to the bending line induced by the pressure F ' from the counter-stopper 4, whose perpendicular component Fk acts towards the inner bend radius. As the flexor 2 moves to the initial position, the anti-skid 4 and the retainer 5 extend the bent material 6 from the flex 3.

This process can be used in the production of profiled parts of any shape. Other advantages of the gas according to the invention are its versatility and its use in conjunction with conventional presses.

Claims

OBJECT A method of producing a bend-shaped profile component in which a bending force is applied to the bent material, causing a bending moment and a counter-pressure on the retainer, which acts in a direction perpendicular to the bending direction, characterized in that the bending-force animal is an angle greater than 90 ° and less than 13 ° 15 ° and the perpendicular counterpressure component acts in the opposite direction to the bending force direction. 1 sheet of drawings 240498