DE279623C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 84 £ \ GROUP

FRIED. KRUPP ACT-GES. in ESSEN, Ruhr.

Patented in the German Empire on October 31, 1911.

The invention relates to such iron sheet piles, which in the composition with neighboring sheet piles give them reliable guidance '. The The subject of the invention is an iron bung pile "of the type mentioned, which extends through characterized by such a shape that it is expedient in the prior to driving in the sheet pile resulting tapering of its lower end creates a particularly resistant tip.

The drawing illustrates the

Fig. Ι a cross section through a sheet pile wall, the sheet piles of the invention are trained.

2 and 3 each represent a vertical center section through one of the last calibres containing part of a rolling mill suitable for the production of such sheet piles besides the. Cross-sections of the rolled rod to be processed into a sheet pile at the different stages of processing.

The sheet pile consists of a rod with a cruciform cross-section, in which the. two legs A ^{1 are} cut off bluntly and the two other legs A are provided at their ends with facing, hook-shaped strips a ² , which form an inevitable guide when the piles are assembled to form a sheet pile wall.

The sheet piling made from these piles is very resistant to the Earth pressure.

The sheet piles are attached to theirs in order to facilitate the penetration into the ground pointed at the lower end, the result is a point with a cruciform cross-section.

In order to produce a sheet pile, a rod of cruciform cross-section is first rolled out in a known manner, of the four legs of which two adjacent, A ₁ are longer by the same length than the other two A ¹ . That part of the rolling mill on which the machining described above takes place is on the drawing. not shown because his training is well known. The two long legs A are then rolled at their free ends one after the other on the part of the rolling mill shown in FIGS. 2 and 3 in such a way that two facing, hook-shaped bent strips a ² are formed. The dimensions are, as FIG. 1 shows, chosen so that the distance, measured on the inside, of each strip α ² from the leg carrying the other strip is approximately equal to the length of the short leg A ¹ , increased by their wall thickness. The sheet piles can then, as FIG. 1 clearly shows, join together in such a way that each sheet pile with its two strips a ² encloses the two short legs A ^{1 of} the adjacent pile and guides them reliably.

The two strips a ² are produced on the part of the rolling mill illustrated in FIGS. 2 and 3 in two stages.

The top roller B has in the middle a collar b ¹ of rectangular cross-section. Two grooves b ^{2 are} arranged symmetrically to this

arranges, the width of which corresponds to the wall thickness of the legs A ^1. At its two ends, the upper roller is provided with a respective collar ^s b provided by non below 45 ⁰ inclined conical surface is limited · l ⁴ '.

In the middle of the lower wake C has a groove c ¹ which allows entry to the collar h ¹ and is symmetrical to the latter , the width of which is twice the wall thickness of the legs of the sheet pile than the width of the collar b ¹ . Below the grooves V , the roller C has a rectangular groove c ² , the depth of which is at least equal to the length that the legs A have before the bars a ^{2 are} bent, and the width of which is at least equal to the height of the bars a measured on the outside - is. The arrangement is such that the flat boundary surfaces of the grooves c ² lying on the left side are flush with the corresponding surfaces of the grooves b ^2. The length of the effective part of the lower roller C is smaller by a small amount than the length of the part of the upper roller lying ^{between the conical surfaces Z> 4.}

After machining in the part of the rolling mill (not shown), the rolling rod, which now has the usual cruciform cross-section of unequal leg length, is inserted into the grooves & ² and c ² on the left-hand side in the manner shown in FIG. When passing through the rolling is the left collar ^s b of the upper roll of a long leg A bent at its end at an angle of 45 ^0th The rolling rod is then inserted into the grooves b ² and c ² on the right-hand side and the right-hand part of the groove c ¹ without being rotated beforehand. When passing through the rollers, the part of the leg A, which has already been bent by 45 °, is now bent over by the collar b ¹ to a right angle, so that the bar α ² is formed. After the second passage through the rollers rotating the roll bar 90 to the left around ⁰ and supplies it in from the FIG. 3 manner shown in turn to the data located on the right side grooves V and c ^2. During the passage through which the free end of the still straight leg A Wai-zen passes under the rightmost collar b ^s of the upper roller and is also deflected by this 45 ^0th Finally, the rolled bar is once again without being inverted beforehand, as shown in FIG. 3, .. in the located on the left side grooves Ψ and c ² and in the left part of the groove c ^{1 is} inserted, whereupon on passage through the Rolling the part of the leg A bent by 45 ° in the last pass is bent through the collar.6 ¹ up to a right angle. The production of the bung pile is now complete.

The production of the strips a ² can of course still be simplified if the turning is not carried out in two stages, but in one stage each.

Claims (4)

Patent Claims: ι. Iron sheet pile, characterized in that it consists of a rod of cruciform cross-section, in which two adjacent legs (A) are provided at their ends in a known manner with facing, hook-shaped bent strips (α ² ). 2. A method for producing sheet piles according to claim i, characterized . characterized in that first a rod of cruciform cross-section is rolled out, in which two adjacent legs (A) are longer than the other two (A ¹ ), and that then the production of the strips (α ² ) also on a rolling mill by bending the ends of the long legs (A) . 3. To carry out the method according to claim 2 certain rolling mill with two parallel rollers which are able to accommodate the roller rod only in such a position that the central longitudinal plane of two opposing legs is perpendicular to the axes of rotation of the rollers, characterized in that in the for the production of the strips (α ² ) serving parts of the rolling mill, the one roller (B) is only provided with grooves (b ² ) which are intended to receive one of the short legs (A ¹ ) , and also at least one in a corresponding groove (c ¹ ) the other roller (C) engaging collar (z. B. b ¹ ) for bending the ends of the long legs (A) has, while the second roller (C) has the grooves required to receive the long legs, of which at least one (c ² ) is designed so that it's one of the long legs (A) after its free end has been bent over able to accommodate when the opposite short leg (A ¹ ) in the corresponding groove (b ² ) of the first roller (B) is located. 4. Rolling mill according to claim 3, characterized in that of the grooves which are intended to receive one of the long legs (A) , at least one (c ² ) is designed so that they not only follow this leg (A), but can also take up before bending its free end. 5 · Rolling mill according to claim 3 for the production of the strips in two stages, characterized in that the one roller (£>) with two collars (b ^s ) for bending up to the first stage, one between these collars (b ¹ ) for bending up to the second stage and between the two outer collars (b ^s ) and the middle one (b ¹ ) each with a groove (b ² ) suitable for receiving a short leg (A ¹ ) , while the other roller ( C) apart from one with the central collar (b ¹ ) of the first roller (B) cooperating groove (c ¹ ) z \ vei on both sides Λ ^Γ οη this has grooves (c ² ) according to claim 4. 1 sheet of drawings.