SU1676708A1 - Method of forming different - flange channel profiles - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used in the production of varietal curved profiles. The purpose of the invention is to improve the quality of channel-type profiles by corrugations on the wall by improving their geometry. In the manufacture of unequal channel profiles in the rolls in the first pass, an intermediate unequal corner is formed with a width of a smaller shelf equal to the width of the larger shelf of the channel and a width of the larger shelf equal to the sum of the width of the wall and the smaller shelf of the channel. In the first pass, the smaller corner shelf is folded over by an angle equal to 0.27 of the magnitude of a given angle on the finished profile. In the second transition, a large corner shelf is bent to form a wall and a smaller channel shelf, and the channel wall is raised up to form a horizontal section and areas of inflection between the wall and the shelves. The total corners of the larger shelf of the channel receive in each pass except the last one more than its shelf with smaller width. 1 il i (L

Description

The invention relates to the processing of metals by pressure and can be used in the production of varietal curved profiles.

The aim of the invention is to improve the quality of the profiles by improving their geometry.

The drawing shows a diagram of the molding of unequal channel channel profile with a corrugated wall

The profile is molded in eight passes.

In the first pass, two adjoining shelves of different widths are folded to form an unequal leg with a large shelf 1 wide B, folded over the corner, and with a small shelf 2 wide b, folded to the maximum possible angle when forming bent corner profiles

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In the second passage, a large shelf of the intermediate corner is bent

with the formation of a smaller shelf 3 and the profile wall, which is bent up to the height of the corrugation h with the formation of a horizontal section 4 on it and areas of inflection ab between the shelves and the wall.

In the third pass, on the section 4, the profiles were formed vertically down longitudinal closed corrugations 5 with height (depth) h when the sections of the wall ab were clamped with ab rollers, and shelves 2 and 3 reached the angles of inclination to the horizontal a3 and Pz

In the fourth and fifth passages continue to hem the shelves 2 and 3 up

In the sixth aisle, the profile is rotated in the direction of its larger shelf 2, thus forming a slope of the wall 4 to the horizontal at an angle YiВ of the finishing (seventh and eighth) aisles continue to rotate the profile section (at angles Y2 and knots) with simultaneous bending of the shelves to the final angles ag and p8. In

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all passes except the eighth, the value of p is greater than a.

The annual section of the profile in the position shown for the eighth pass was subjected to cutting.

Example. The profile of a ladder step 170X50X20X2.5 mm (unequal channel with straight shelves) and a wall with closed longitudinal corrugations 5 mm high is made in ten passes;

I - hem of two conjugated shelves with the formation of an unequal leg with a small shelf 50 mm wide; ,

II- kink the greater shelf of the intermediate corner with the formation of a small shelf of the channel, the wall, which was raised up to form a horizontal section on it, raised to a height of 5 mm; section width 130 mm; , III - formation of corrugations on the wall while clamping the areas of inflection between the shelves and the wall; IV -, V - IV - rotation of the section towards the larger shelf of the channel; , VII -,, VIII -,, cutting to length and re-shaping the small shelf of the channel; IX - hell 85 °; X -.

The technical and economic advantage of the described method is the possibility of obtaining profiles, corresponding to

requirements of high precision profiling.

Claims (1)

Invention Formula The method of forming neravnopolochny channel profiles in the rolls by bending the shelves to different angles through transitions, according to which on the first transition an intermediate unequal corner corner is formed with equal movements of edges, then a large corner shelf is bent to form a wall and a smaller channel shelf and to carry out further hemming of the shelves of the channel with the profile turning on the last transitions, characterized in that, in order to improve the quality of the profiles with corrugations on the wall, in the first transition a smaller shelf angle The olka is folded over at an angle equal to 0.27 of the given angle on the finished profile, when the greater corner shelf is bent, the place of bending between the wall and the smaller channel shelf is placed at the molding level, and the channel wall is raised up to the height of the corrugation molding with the formation of a horizontal section and 5 shelves with a wall, which are adjacent to it on both sides of this section of the bend, in a subsequent transition, corrugations are formed on the horizontal wall section with clamping of the bend sections, and the total angles of the greater shelf of the channel receive in each transition more than the latter smaller shelf. 0 F W 7 W 75