RU2746193C1 - Die for processing of end sections of u-shaped beam - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: invention relates to metal forming and can be used for processing end sections of U-shaped beams, for example, U-beams. Die includes upper and lower plates, sectional punch and sectional matrix. There is an assembly of the upper extractor made in the form of a guide bushing fixed on the upper plate, a compression spring located on the outer surface of the guide bushing, a pusher connected to it and placed in the hole of the guiding bushing of the screw. Male die consists of the middle section, on which the rear stop is fixed, and replaceable lateral stepped sections attached to the middle section. Matrix is made in the form of replaceable stepped sections reciprocally replaceable to puncheon, having working part with shape and sizes corresponding to shape and sizes of side sections of male die. Gap between replaceable side sections of the puncheon and reciprocal replaceable stepped sections of the matrix has a constant over the entire working length of the puncheon and matrix, a value equal to the specified thickness of the beam.

EFFECT: as a result, the deflection of the beam wall is eliminated.

1 cl, 5 dwg

Description

The invention relates to mechanical engineering, in particular to the field of metal pressure processing, and can be used for processing the end sections of U-shaped beams, for example, channels. Beams are made from a bent channel [GOST 8278-83 “Steel bent equal-flange channels. Range "] with dimensions h × b × s (h is the wall height; b is the width of the shelves; s is the thickness of the channel) according to the specifications [GOST 11474-76" Steel bent profiles. Specifications "].

From the prior art is known a stamp containing a punch, a sectional matrix enclosed in a holder, and a pusher [Ilyin L.N. Sheet stamping technology: textbook for universities / L.N. Ilyin, E.I. Semyonov. - M .: Bustard, 2009 .-- 475 p. (p. 147)].

The disadvantage of the stamp known from the prior art, including the technical problem, is that a flat blank of limited width is used to manufacture U-shaped parts, and the required section profile is obtained over the entire width of the part.

The closest analogue in technical essence and purpose in relation to the proposed invention is a stamp selected as a prototype for bending shaped blanks, containing a three-section punch, the side sections are installed with the possibility of 180 ° rotation around the vertical axis and are made with two working surfaces, on one of which the ejector groove and the forming pocket are made. On one of the working surfaces of the sections of the two-section matrix, a groove is made, expanding at the top [Inventor's certificate SU 1433544 A1, B21D 7/02. Publ. 10/30/1988 / V.A. Romanenkov, N.K. Ivanov].

The disadvantage of the stamp known from the prior art, including the technical problem, is that with the help of the stamp, all beam flanges are simultaneously bending with the obligatory formation of external or internal folds on the lateral flanges of the beam, depending on the option of installing the matrix and punch sections.

The objective of the present invention is to provide the possibility of processing long beams having a U-shaped section along the entire length, for example channels, on a limited length of end sections with a decrease in the wall size by a predetermined amount, while eliminating the possibility of defects in the form of deflection of the wall and beam flanges.

The claimed invention was based on the technical result - changing the size of the cross-section of a long U-shaped beam by a predetermined value at a limited length of the end section due to the combined fixation of the position of the workpiece on the punch sections while maintaining the flatness of the wall due to the use of an ejector with an elastic element, for example a spring , as a clamp, the compression of which provides the necessary pressing force of the beam wall by the ejector to the punch.

The problem is solved, and the claimed technical result is achieved by the fact that the stamp for processing the end sections of the U-shaped beam by reducing the size of its wall, containing the upper and lower plates, a sectional punch and a sectional matrix enclosed in a cage, is equipped with an upper ejector assembly made in the form of a guide sleeve fixed by means of a threaded connection on the upper plate, a compression spring located on the outer surface of the guide sleeve, an ejector associated with it and located in the axial hole of the screw guide sleeve to limit the ejector stroke, the sectional punch consists of a middle section on which it is fixed back stop for limiting the length of the processed end section of the beam, and replaceable side sections made stepped and fastened to the middle section by means of a threaded connection, the sectional matrix is made in the form of interchangeable stepped sections responding to the punch, having a working part from the molds th and dimensions corresponding to the shape and dimensions of the side sections of the punch, while the gap between the replaceable side sections of the punch and the reciprocal replaceable stepped sections of the matrix has a constant value along the entire working length of the punch and the matrix, equal to the specified thickness of the beam, and the ejector is made with the possibility of pressing the wall of the processed the end section of the beam to the upper plane of the punch with a force preventing the bending of the said wall.

The invention is illustrated by graphic images.

FIG. 1 - Stamp for processing the end sections of U-shaped beams - main view (section along B-B).

FIG. 2 - A stamp for processing the end sections of U-shaped beams - plan view with the upper part removed.

FIG. 3 - Symmetrical processing of opposite end sections of U-shaped beams.

Fig. 4 - Symmetrical processing of the end section of the beam and right-hand processing of the opposite end section of the beam.

FIG. 5 - Symmetrical beam end machining and left hand machining of the opposite beam end.

A stamp (Fig. 1) for processing the end sections of a U-shaped beam by reducing the size of its wall, containing upper 1 and lower 2 plates, a sectional punch 3 and a sectional matrix 4, enclosed in a holder 5, is equipped with an upper ejector assembly made in the form the guide sleeve 6, fixed by means of a threaded connection 7 on the upper plate 1, a compression spring 8 located on the outer surface of the guide sleeve 6, an ejector 9 associated with it and located in the axial hole of the guide sleeve 6 of the screw 10 to limit the stroke of the ejector 9, sectional punch 3 consists of a middle section 11, on which a back stop 12 is fixed (Fig. 2) to limit the length of the end section of the beam to be processed, and replaceable side sections 13 and 14, made stepped and fastened to the middle section by means of a threaded connection 15 (Fig. 2), the sectional matrix 4 is made in the form of replaceable stepped sections 16 and 17, responding to the punch, having a working part with a shape th and dimensions corresponding to the shape and dimensions of the side sections 13 and 14 of the punch 3, while the gap between the replaceable side sections 13 and 14 of the punch 3 and the reciprocal replaceable stepped sections 16 and 17 of the matrix 4 has a constant value along the entire working length of the punch 3 and the matrix 4 equal to the predetermined thickness of the beam, and the pusher 9 is made with the possibility of pressing the wall of the processed end section of the beam to the upper plane of the punch 3 with a force preventing the deflection of the said wall. The yoke 5 through the support 18 is connected to the upper plate 1 with a pin 19. To align the movable and stationary parts, the stamp is equipped with guiding elements in the form of guide columns 20 fixed in the lower plate 2 and guide bushings 21 pressed into the upper plate 1. Unused replaceable punch sections and dies (positions 22 to 35 of Fig. 1 and Fig. 2) are installed in packages on the bottom plate 2 of the stamp from the rear and left sides (Fig. 1 and Fig. 2) and are fixed by means of threaded connections.

A stamp for processing the end sections of U-shaped beams works as follows.

A pre-cut workpiece of the required length, for example a channel, with an end section locally heated to the temperature of hot stamping, oriented with the shelves downward, is installed on the punch (3), which consists of replaceable sections 11, 13 and 14. During the operation of the die (Fig. 1) first, a pusher 9 is lowered onto the wall of the workpiece, for example a channel, which acts locally along the length of the end section to be processed, in order to avoid displacement and further deflection of the workpiece wall, then, gradually, as the matrix 4 moves down, the opposite shelves are pressed by the sections 16 and 17 of the matrix 4 the end section of the workpiece to the punch 3 having a size in width that is less than the size of the initial section of the beam by a given amount, thereby changing the size of the cross-section of the end section of the workpiece at a given length.

In the stamp (Fig. 1) for processing the end sections of the U-shaped beams, for example a channel, the workpiece is fed with the heated end forward and the length of the end section to be processed is fixed along the back stop 12 (Fig. 2). After turning on the press (not shown in the images), on the working stroke, the ejector 9 of the upper ejection mechanism attached to the upper die plate 1, which is connected to the compression spring 8, is lowered onto the workpiece shelf and presses it against the upper plane of the punch 3 along the length of the end section being processed, consisting of replaceable sections 11, 13 and 14. As the top plate 1 of the stamp moves down, the spring 8 is compressed, which leads to an increase in the force pressing the ejector 9, which, while the shelves are compressed by the oppositely installed sections 16 and 17 of the matrix 4 (Fig. 1 ), prevents bending of the wall of the end section of the workpiece, which in turn remains flat. The pressure treatment of the end section of the workpiece is carried out by an amount equal to the thickness of the beam on the side of both shelves during double-sided processing (Fig. 3), or from the side of one of the shelves during unilateral processing - right-side (Fig. 4) or left-side (Fig. 5) (lower end sections of the beam). When replacing the replaceable sections of the punch 3 and matrix 4, the end sections of the beam can be processed to different lengths. As a result, along with obtaining the required shape and dimensions of the end section of a U-shaped beam, for example a channel, the flatness of the beam wall at the end section being processed is ensured, which increases the quality of the beams manufacturing, and the technology does not need an additional operation of plane calibration of the wall, which, in in turn improves productivity.

From the considered example, it follows that during the operation of the stamp declared in the claims, high-quality U-shaped beams with end sections of the required dimensions and shape are obtained, ensuring the flatness of the walls.

Thus, the claimed set of essential features, reflected in the claims, provides a solution to the problem posed - ensuring the possibility of processing long beams having a U-shaped section along the entire length, for example channels, on a limited length of end sections with a decrease in the wall size by a given amount and achieving the declared technical result - changing the size of the cross-section of a long U-shaped beam by a predetermined amount at a limited length of the end section due to the combined fixation of the position of the workpiece on the punch sections while maintaining the flatness of the wall due to the use of an elastic element, for example, a spring, the compression of which provides the necessary clamping force of the workpiece ejector to the punch.

The analysis of the claimed technical solution for compliance with the conditions of patentability showed that the features indicated in the formula are essential and interconnected with the formation of a stable set of necessary features, unknown at the priority date from the prior art and sufficient to obtain the required synergistic (over-sum) technical result.

Thus, the above information indicates the fulfillment of the following set of conditions when using the claimed technical solution:

- an object that embodies the claimed technical solution, in its implementation, relates to mechanical engineering and is intended to carry out the process of pressure treatment of the end sections of U-shaped beams, for example, channels;

- for the declared object in the form as it is described in the formula, the possibility of its implementation is confirmed using the means and methods described above in the application or known from the prior art as of the priority date;

- an object that embodies the claimed technical solution, in its implementation, is able to ensure the achievement of the technical result perceived by the applicant.

Consequently, the claimed object meets the criteria of patentability "novelty", "state of the art" and "industrial applicability" under the current legislation.

Claims (1)

A stamp for processing the end sections of a U-shaped beam by reducing the size of its wall, containing an upper and lower plates, a sectional punch and a sectional matrix enclosed in a cage, characterized in that it is equipped with an upper ejector assembly made in the form of a guide sleeve secured by a threaded connection on the upper plate, a compression spring located on the outer surface of the guide sleeve, an ejector associated with it and located in the axial hole of the screw guide sleeve to limit the ejector stroke, a sectional punch consists of a middle section, on which a back stop is fixed to limit the length of the processed end section of the beam, and replaceable side sections, made stepped and fastened to the middle section by means of a threaded connection, the sectional matrix is made in the form of replaceable stepped sections responding to the punch, having a working part with the shape and dimensions corresponding to the shape and dimensions of the side sections tions of the punch, while the gap between the replaceable side sections of the punch and the reciprocal replaceable stepped sections of the matrix has a constant value along the entire working length of the punch and the matrix equal to the specified thickness of the beam, and the ejector is made with the possibility of pressing the wall of the processed end section of the beam to the upper plane of the punch with a force preventing deflection of the said wall.

Images