DE1953387B2 - DRAWING AND FORMING TOOL FOR MANUFACTURING MANIFOLD HALF-SHELLS - Google Patents

Description

' III

EsTstSer 3? SbÄ ^ S formation of ™ $ fiZ ^ £ hL · crease- free to ^ press, Ro ^E h ^S rbö erbest, SmS Hefner outer rests on the Z- ^ S and an inner arch-Mlfte are built up, the 60 mung and Counterholder the board will be welded together along the side seams. see stamp «^. ^^ JÄ ^; The circle-forming centers η e used to form the inner tube half are so gefuto that

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ment is brought, in which he touches the board from below. When producing half-shells for 90 ° bends, a plate with a central angle of about 80 ° can be used as the plate because the outer curve of the finished half-shell is considerably larger than the inner curve. During the gradual penetration of the stamp, which also has the shape of a quarter ring with a 90 ° bend, the counter-holder grips under the quarter-circle center line dsr P ¹ tine and moves downwards, since the counterforce that moves it upwards is kept lower than the pressure of the stamp.

As the stamp goes down from the center, the circuit board attaches itself more and more to it Bottom, while the side parts of the board on the curved surfaces of the upper part of the gutter rest and be pulled down in contact with this until the punch reaches its end position Has. In general, there is a certain overhang at the edges of the half-shell, which one cuts off. The finished half-shell is ejected after the stamp has been extended Upward movement of the counter holder on which the finished workpiece rests.

Based on the drawings, the training and mode of operation of the new drawing and die-cutting tool should be shown are explained in more detail. It shows

F i g. 1 the one for producing a 90 ° pipe elbow half-shell serving board in a plan view,

F i g. 2 shows a vertical section in a radial plane through the die and punch of the tool applied board,

F i g. 3 the tool according to FIG. 2 with partially already gone down stamp,

F ί ρ 4 the tool according to F i g. 2 at still further penetrated stamp,

F i g. 5 the end position of the tool according to FIG. 2,

F i g. 6 the tool according to FIG. 2 with raised punch and ejection of the finished work tükkes,

Fig. 7 is a perspective view of the finished pipe elbow half-shell.

To produce a pipe elbow half-shell 25 (FIG. 7), a circuit board is used which is passed through an inner circular edge 10, an outer circular edge 11 and two radially extending, the width of the board defining end edges 12 is limited (Fig. 1).

The die 13 (F i g. 2 to 6) has a bottom 14 which is semicircular in cross section and in which there is a recess 15 in the middle. Above the line 16 shown in dash-dotted lines, it returns around the curvature of the side walls and goes in

over the inlet surface 17, which extend to the inner edge part 18 and the outer edge part 19.

The punch consists of a cylindrical part 20 and the head penetrating into the die 13 21, the same as the bottom 14 the diameter

ίο corresponds to the half-shell 25 to be produced.

On a row of resiliently mounted bolts 22 is seated the counter holder 23, its top 24 also corresponds to the shape of the half-shell 25 to be produced and the half-shell 25 to be produced

is supported along its entire median line.

As one can see from FIG. 2 can be seen, after the stamp 20, 21 is still in a higher position befir '.: t, the board on the die 13 so laid up that you with your inner

so circular edge 10 approximately on the edge part 18, with her outer circular edge 11 comes to rest approximately on the edge part 19 of the die 13.

Now begins with the going down of the punch 20, 21 the deformation of the board, the the counter holder 23 also follows.

As shown in FIG. 3, the middle part of the board is already taking its final shape on, whereby it is clamped between the punch head 21 and the counter holder 23. The one near the

Circular edges 10 and 11 lying parts of the board are gradually on the run-in surfaces 17 pulled down, but still approximately retain their flat shape without the danger a buckling.

If the punch head 21 has already sunk in as deeply as can be seen from FIG. 4 is recognizable, the larger one has Part of the board except for the inner and outer circular edge 10, 11 has already assumed its final shape.

F i g. 5 shows the end position of the stamp 20, 21 again. As you can see, the circular edges 10 and protrude 11 beyond the line 16, which corresponds to the radius of the circles that form the cross-section of the stamp 20, 21 and the die 13. The parts protruding beyond the line 16 are then separated removed by turning or in some other way.

F i g. 6 shows how the counter holder 23 removes the finished pipe elbow half-shell 25 from the die 13 highlights.

For this purpose 3 sheets of drawings

Claims (1)

bar and swing arranged, constantly against the Claim: Stamp pressed GWÜ «touD« Werto ^ c soU only hesitantly follow the drawing die Drawing and stamping tool for producing bulges, which form during ^^ J ™ ^^ from R ^ rkrümmer-Halbschalenf whereby the ma- 5 are supposed to consist of a groove with a bottom towards the end of the Z ^ rganges trize from a channel with a bottom, pulled out again smoothly (Swiss pa of a semicircular one of the shape of the Halbentschnft 70 795). _{7,. after} . _{t from} the lack shell-adapted cross-section with connecting- This procedure starts with "^" JgJg which, on both sides up to the upper edge, opens up to the formation of a ^ * _Β ™ ™ nni * to * a * ™ nenden ascending inlet surfaces, and io parts, namely an inner ^UQ f ^{em a} " ^ß ^ ^r '™ ^ where In the middle of the channel there is a vertical drop, otherwise it is n. $ J ^ Q ** ™ a generously mounted ejector for the board is located, during the drawing process Wu ^ have clocked in a recess in the bottom of the channel until a smooth surface zu.Jf ^ J ^^ J can be countersunk to be flush with this, bending strengths are not suitable for this pressing tool even during the punch of the shape of the inside 15,
the half-shak is adapted, thereby it is already a It denotes that in the case of the work blanks intended for the production of partial, e.g. quarter-arches, the ejector as the entire center line of the centering piece with a support in the pipe elbow half-shell and with a counter holder ( 23) is formed and the inlet area of the finished parts * ^ & Pfl ™. ™ ¹ ^. chen (17) a set curvature that opens towards the bottom of the channel (14) and opens up towards the channel bottom (14), with the abbey on both sides ois to the uu .. ". . ■ ftand the inner and outer edge part (18, 19) ascending ^ ¹ " ¹ *" -? ζ, II height flexible gela the width (12) to be placed on the edge parts, 5 corresponds in the middle in ^ ' ^H ° ^h «^^ Sdfgen to the board (10 to 12). ge ^^ SSSS ^^^ tS- cal patent specification 1294 908). The said work _zeu o is only suitable for the production of 30 pipe elbow half-shells, small diameter. * and for thin walls. The subject of the invention is a drawing and forming it is the ^^ Punching tool for making pipe elbows using a single one Half shells, which are used in such a manner that knew Tools ^"n by welding together two processed tools for crease-free healing Half-shells a finished pipe elbow is formed. ™ ^^ ^m ™ ^^ j £ There are pressing tools known, by means of which from wheel, s and ^Wands ' ^arken E' ^^ _for production a plate an elongated groove is formed,, 0- According to the Eiftndurj ^^ dem - Herst ^^ for die and punch head the shape of the opposite of ieil, eg ^y ™ "- ¹ » B ₄ o ^^ J ^ ™ ^^ * surfaces of opposite curvature are conditionally ropes of the HaiDsciwicii * g ? * by the shape of the object to be manufactured; it stands out from a soil, the «nen At the beginning of the pressing process, the board is well above the P ^^^^^ the edges above (U.S. Patent 1,641,955). cut with »^ There are also pressing tools for production chen a pot-like container, for example a Bremstrom- has in the ^ ^ ^^. ^ mel, of a round metal disk known height nachgie ^ ^ ^e ^ _d J 8 _{channel bottom to}