RU2227771C2 - Method for separating bent shapes - Google Patents

Abstract

FIELD: plastic metal working, possibly in machine engineering for making parts from bent shapes. SUBSTANCE: method comprises steps of gradually separating members of cross section of shape by means of movable and stationary cutters; performing separation while using: mechanism for separating bent shapes with stationary cutter mounted on said mechanism, slide of press and rocker arm supporting movable cutter; taking gaps between shape and movable cutter at side opposite relative to motion direction of movable cutter; providing constant-effort action of press slide upon rocker arm; moving cutters together with mechanism for separating bent shapes. EFFECT: enhanced quality of shapes due to prevention of edge crumpling, barb and chipping occurring. 2 cl, 7 dwg

Description

The invention relates to the processing of metals by pressure and can be used in the manufacture of parts from bent profiles in mechanical engineering and metalworking. There is a method of dividing rolled metal into billets, including applying voltage concentrators to the rolling and rolling rolling separation (AS USSR No. 1530349, B 23 D 23/00 from 04.01.88 publ. BI No. 47 from 12.23.89).

The disadvantage of this method is that this method is very difficult to separate the rental with shelves of different heights and thicknesses while maintaining the profile of the workpiece, as well as the absence of burrs on the finished part.

A known method of separating bent channels, mainly unequal, including the gradual separation of the elements of the cut cross-section of the profile by means of knives (AS USSR No. 1597253, B 23 D 23/00 from 04.07.88, publ. BI No. 37 from 07.10.90 - prototype )

The disadvantage of this method is the impossibility of using it in the separation of rolled products with different heights and wall thicknesses, as the edges are wrinkled, which distorts the quality of the cut, leads to uneven chipping of the rolled products, and therefore reduces the quality of finished parts. The objective of the invention is to improve the quality of the parts obtained, excluding crushing edges, the formation of chips and burrs.

The problem is solved by the method of separation of bent profiles, including the gradual separation of the elements of the cut cross-section of the profile by means of movable and fixed knives, according to the invention, for the separation of the profile, a mechanism for separating bent profiles is used, on which a fixed knife is fixed, a press slider and a drawer on which the movable knife is fixed, by which the gaps between the profile and the fixed knife are selected from the side opposite to the direction of movement of the movable knife, for which They are pressed with a continuous effort on the side of the press slide with the movement of knives together with a mechanism for separating bent profiles.

According to the method of claim 1 of the invention, separation of unequal bent profiles is carried out.

Analysis of the proposed solution with the prototype allowed us to highlight the features that distinguish the proposed solution from the prototype, which meets the criterion of “novelty”

A comparative analysis of the proposed solution with the known did not reveal signs that match the features of the proposed solution, which meets the criterion of "inventive step".

The method is illustrated by drawings, where in Fig.1 is a schematic drawing of the placement of the cutting mechanism; figure 2 is a schematic drawing of the placement of the cutting mechanism on the press; figure 3, 4, 5, 6 shows a diagram of the interaction of knives and profile in the process of cutting; Fig.7 is a schematic drawing and dimensions of the cut blank. A device for separating bent profiles consists of a press 1, a mechanism for separating bent profiles 2 (FIGS. 1, 2), which is mounted on a table of a press 3 (figure 2), and a link 4. A mechanism for separating bent profiles 1 is located on the rollers.

A movable knife 5 is mounted on the wings 4, a fixed knife 6 is fixed in the mechanism for separating bent profiles. The mechanism for separating bent profiles 1 is spring-loaded by springs 7. One end of the link 4 (Fig. 1) is mounted rotatably around a movable axis fixed to a device for separating bent profiles (not shown in the drawing), and the other end is spring-loaded with spring 8.

A tray 9 is attached to the separation mechanism of the bent profiles 2, into which a shared profile 10 is supplied. In addition, an emphasis 11 is fixed to the device for separating the bent profiles 2.

An example implementation of the method.

A profile (Fig. 7) with dimensions in the cross section 12 × 13 × 12 mm and a shelf height of 38 and 55 mm, a length of 6500 mm is fed all the way to the device 11 for separating bent profiles. During the course of the press slider (not shown in the drawing), a отверстия 26 mm hole is punched simultaneously and a 60 mm long workpiece is cut. A press slider (not shown in the drawing), acting on the wings 4 of the bending profile separation mechanism 2, shifts it to the left until a gap between the face of the fixed knife 6 and the inner side surface of the low shelf is selected (Figs. 3, 4). The profile of the movable knife 5 at this time coincides with the profiles of the stationary knife 6.

To facilitate the movement of the mechanism for separating the bent profiles 2, it moves along the table of the press 3, interacting with the springs 7. After the gap is selected, the fixed knife 6 remains in this position until the separation of the profile is completed together with the mechanism for separating the bent profiles 2, and the movable knife 5 located in the wings 4 (together with it), moves along an arc of a circle, dividing the profile 10 gaplessly, at an angle of 42 °, eliminating the deformation of the guide shelves (figure 5, 6).

After the separation of rolled products, the workpiece is fed to the tray 9 of the mechanism for separating bent profiles 2, and the slider press (not shown) is returned to its original position. The link 4 under the influence of the spring 8 will occupy the initial position at which the movable 5 and fixed 6 knives are combined. At the same time, the springs 7 return the separation mechanism of the bent profiles 2 to their original position, and the cycle of work is repeated.

Profile measurements of the chopped off workpiece showed:

- there is no deformation on the high and low shelves of the workpiece;

- the straightness of the pipe does not exceed 1 °;

- on the surface of the shaft there are separate breakouts, the depth of the protrusions and depressions of which does not exceed 0.5 mm;

- the contact surface of the guide shelves to the template is flat, without gaps.

Thus, the proposed method for the separation of profiles, mainly unequal, allows to improve the quality of finished parts, to expand technological capabilities in the separation of various sizes of profiles of this type.

Claims (2)

1. The method of separation of bent profiles, including the gradual separation of the elements of the cut cross-section of the profile by means of movable and fixed knives, characterized in that for the separation of the profile using the separation mechanism of bent profiles, on which a fixed knife is fixed, a press slider and a drawer on which the movable knife is fixed by which the gaps between the profile and the fixed knife are selected from the side opposite to the direction of movement of the movable knife, for which they act by continuous force a connecting link the slide presses with movement of the knives in conjunction with the separation mechanism formed sections. 2. The method according to claim 1, characterized in that the separation of unequal bent profiles.

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