DE2204683A1 - Device for making pipe crooked - Google Patents

Description

ί * / Λ -,,. «, I, -v'ALT

Mlf.cl.cn 21 - ücuharchtr. 81

Tttefcw% r / tö A - ■,

GiSORiJ 1 ' ¹ ISGHUR AKTIüKGÜoiSLISCHAFT, Schaffhausen

Device for producing pipe elbows

The invention relates to an apparatus for producing RoYtr crimping with a small radius using a divisible Press mold, which is one of the shape of the to be manufactured Pipe elbow corresponding G-esen.-chohlraum, wherein sin press punch for pressing in a pipe section and an i:; e / - '; enUb97 · the press ram retractable and extendable Cregenh'iltor rnib a lcu / jeü f öraiigen? head are provided.

ώΰ i.Kb a device ζν.τ manufacture of pipe bends Aun Rohro.bi- chni.t; th known means t.-iner divisible press mold,

209839/0683

SAD ORIGINAL

(German Patent No. 1 036 605), that is, the press mold has a passage corresponding to the shape of the pipe bend, which is formed by two straight end sections and a curved section connecting them Press in the pipe section and a counter-container with a spherical head cooperate in the straight outlet section. D "r Einriebtung disadvantage of this is that KohraV.-section, of the relatively rigid guide the spherical head, the material is compressed on the inside of Hohrkriunners and leg over, when pressing of; .gestreckt elsewhere in the straight I ¹ OiI where unequal thicknesses and cracks can occur very easily.

It is also a device for producing pipe elbows has become known - USA Patent No. 1 993 361 - at the one pipe section by means of a press ram, which is provided with a hinged ball, .nit predetermined! Hub pressed into the mold and then pulled out again will. This device has the disadvantage that the retracting ball does not cover the entire pressed-in pipe section coated, which remains drawn in on one side, which still requires an additional work step, to get a finished elbow.

209839/0883 " ^{In uniulfi; L}

The object of the present invention is to provide a device for Core division of pipe elbows of the aforementioned £ rt create, through which the aforementioned tile parts are avoided.

The device according to the invention is characterized in that that the counterholder with a freely articulated, in the die cavity: vun pivotable with respect to the I / inrsachse of the blessing holder Ball finger is provided.

In the drawing, the subject matter of the invention is based an exemplary embodiment described. Show it:

Fig. 1 is a view of a compression mold half with retracted Counterholder, ^ inf ^ logteni pipe section and outside the press punch located in the mold,

Fix. 2 the view as in FIG. 1, but with the press plunger retracted and the imprinted pipe section shown in section,

Fig. 3 di- ° view like Fig. 1 with manufactured pipe elbow, i-o -.- io the holder and the Preas stamp in a? r not yet fully extended from the die S ', - llung,

20 9 8 39/0683 SAO ORIGINAL

Fig. 4 is a view of a tubular blank to a bend should be deformed, and

Fig. 5 is a view of the tubular shaped into an elbow Part.

? ig. 1 shows a view of a press mold half 1 with a die cavity 2 and with a punch housing 3, not shown in detail, to which a counter holder 4 is attached, which has a cylindrical section 5 that fits exactly into the die cavity 2. The counter holder 4 has a section £ with a smaller diameter, a joint 7 is arranged at polygons on the lower 2nde, which is provided for supporting a ball finger 8. The spherical finger B has a spherical head 9 », with a valley section 10 provided with a concavely curved inner guide surface 20 carrying the head 9 of the spherical finger 8.

Kit of the mold 1 and the counter holder 4 acts a press ram 12 together, which has a cylindrical section which also fits exactly into the Jesenkhohlraum 2. The punch 12 is provided with a conical mandrel 14, which is connected to the cylindrical section 13 by a stop 15 of the stamp 12 is limited.

209839/0683

The pipe section 11 inserted into the press mold 1 is with bevelled edges 16, 17 Pig. 4 vei's see, which are so sized are that the necessary material is available to ensure that the fabricated after pressing and smoothing Pipe elbow 18 Fig. 5 has approximately the same wall thickness as the tubular blank 11 and essentially right-angled, to the axis of symmetry 21, 21 * standing end faces 16 * and 17 '.

The operation of the device described is as follows:

First, the pipe section 11 is immersed in a lubricant and then placed in the press mold half 1 according to FIG. 1. After closing with a second press mold half (not shown), the pipe section 11 is pressed into the die cavity 2 by the punch 12, which is arranged opposite the beveled end 16 of the pipe section 11 and is provided with a conical mandrel 14 for better material flow the counter holder 4 is in the position according to FIG. 1 and FIG. 2, that is to say with respect to its longitudinal axis 19 with an angled ball finger 8. Like in Pig. 2, the pipe section 11 is moved towards the spherical head 9, enclosing the head 9 and sliding under the pressure of the punch 12 along the concavely curved surface 20 of the spherical finger 8. The resulting after the pressing process after 'learning head 9 is not tolerance round pipe section Fig. 2 by pulling

209839/0683

SAD OHiGiNAL

des Ctg '; enhalter 4: nit tiQ.n Ku _; The finger 8 pressed against the inner wall of the cavity 2 'ind smoothed. Pulling out the counter holder 4 and the press ram 12 is ger. ^H ss Pig. 3 a coordinated work process.

The described Vorrich fcunij for making pipe bends has the advantage that due to the arranged in the Genonkhohlrnum Ball inside π ier pressed-in pipe section always at the critical bending point by the! Head. Is well supported, '-rod by a uniform, smooth Wall thickness distribution of the finished earcircle frame 13 (Fig. 5) is guaranteed.

WHEEL ORIGINAL

209839/0683 ^B

Claims (3)

Claims Device for the production of pipe elbows with a small radius using a separable press mold, which has a die cavity corresponding to the shape of the pipe bend to be manufactured, wherein a press punch for pressing in a pipe section and a counter holder that can be retracted and extended in relation to the press punch are provided with a spherical head, characterized in that the counter holder (4) with a freely articulated ball fingers pivotable in the die cavity (2) with respect to the longitudinal axis (19) of the counter holder (4) (δ) is provided. 2. Device according to claim 1, characterized in that the press punch (12) has a conical mandrel (14) and a stop (15). 3. Device according to claim 1, characterized in that that the the. The neck section (10) carrying the head (9) of the ball finger (8) has a concavely curved inner neck section Guide surface (20) is provided. 209839/0683