DE1059870B - Device for necking out connecting pieces on a collecting pipe or boiler - Google Patents

Description

The invention relates to a machine for necking out connecting pieces lying one behind the other on collecting pipes or collecting tanks, which have an insertable into the pipe interior, the necking punch controlling hoist and one that can be placed against the pipe circumference, together with the hoist Die slidable along the tube and means for aligning the lifting mechanism or punch on the neck axis.

Alignment means are provided on the body of the lifting mechanism in the known device Areas that lie against the inner wall of the pipe. However, such surfaces are capable of alignment at most with out-of-round pipes. The alignment is for large lengths of the pipe and tolerances of the Pipe widths questioned or difficult to achieve.

According to the invention it is proposed to avoid these difficulties as a solution that the Alignment means in the manner of a pilot pin lock from a guide hole provided on the hoist and one that engages through a neck opening of the tube when the die is set, there are guide pins arranged on the die carrier. This latch holds that Lifting gear in the correct position, with any rocking or other displacement of the Lifting mechanism prevented during the manufacture of the connecting piece.

Catch pin locks, as they are used in particular with so-called follow-up tools fulfill a task that fundamentally differs from the task of the invention and is not comparable with it Task. This is because they serve with respect to one which is acted upon by several shaping tools one after the other same point of a gradually advanced band or strip to this in each case to bring into precise working position. For this purpose, use the movable tool carrier connected catch pins fitting through prepared holes of the strip in holes of the fixed Tool carrier. Compared to these catch pins and also the widely used dowel pins and centering pins for aligning two machine parts to each other, the invention fulfills the exclusively on the specified field of application limited special task.

The invention is illustrated by way of example with reference to the drawings, namely shows

1 shows a side view of the device with the collecting tube before the hot forming process,

2 shows a section through the axis of the collecting tube of the device before the deformation process,

Device for necking

of connecting pieces on one

Collection pipe or boiler

Applicant:
Andre Huet, Paris

Representative:

Dr. W. Schalk and Dipl.-Ing. P. Wirth, patent attorneys, Frankfurt / M., Große Eschenheimer Str. 39

Claimed priority:
France from February 4, 1954

FIG. 3 shows a section along the line IH-III in FIG. 2.

The device consists of a carriage a with wheels for displacement on rails b, the length of which is at least equal to that of the collecting pipes to be treated. At one end of the carriage α , the entire base frame is mounted on a base c , which is used to hold the collecting tube and the die that rests against this collecting tube from the outside. At the other end of the carriage α a support rod for the hoist is mounted, which ends in two steel strips d ¹ , d ^2; this entire device engages in the interior of the manifold e and at the end carries the lifting mechanism f at the level of the base frame, which drives the ram g inside the manifold.

The base frame, which supports the collecting pipe e at the point to be provided with the connection piece, consists of three supports h ^l , h ² , h ^s , which are excepted in a semicircular or approximately semicircular shape and mounted on a plate fe ⁴ . This is connected to the base c by a screw provided with opposing threads, by means of which the supports h ¹ , h ² , h ³ can be raised as required in order to bring the supports up from below against the collecting tube opposite the point and place them on a connection piece is to be made. Inside the collecting tube e , the bottom f ^{1 of} the lifting mechanism is designed so that it rests against the collecting tube and a seat surface for support

909 558/176

Claims (1)

of the hoist during the hot forming process. The device, which is used to fix the lifting mechanism f and thus to prevent a rocking movement during the piercing process, consists of a pin p which is mounted on a holder p ^1. This can be moved and determined on the plate m , which forms part of the die carrier. The pin p penetrates when the die / in a guide hole q , the body between the support rods d ¹ , d- of the lifting mechanism f and z. B. can be determined by means of a screw q ¹ . Overall, the device works as follows: The collecting tube e, the holes or cavities at the points to be provided with connection pieces, which are generally distributed along a generatrix, is, as can be seen from the drawing, brought into working position that their overhead generating line is the one in whose longitudinal direction the connecting pieces are to be made. Then one leads through one of the ends of the collecting tube the hoist / into its interior and lets the carriage α roll on the rails b to the desired position. Then it is determined. The base frame h ¹ , h ² , h ^{s is then raised in} relation to the base c by turning the screw i until the collecting tube rests on the base frame. The area of the collecting pipe to be provided with a connection piece is then brought to the desired temperature. Then, by means of external lifting devices (not shown), the control rods of which are articulated ^{at i 1} and t- on the eyes of the head k , the cross piece k guided on columns j ¹ , j'- of the base c is lowered in such a way that the die / according to the Drawing on the surface of the manifold opposite the stamp g presses. As a result of this movement, the pin p has been inserted into its guide bore q , which prevents any displacement of the lifting mechanism / inside the collecting tube during the hot forming process. Then you only need the pressure effect, z. B. a pressure medium to turn on inside the hoist f so that the punch penetrates the wall of the collecting tube and necks out a connection piece at the desired point, the metal is displaced into the space between the punch and die. This operation can be repeated with punches and dies of increasing cross-section If the connection is cut after the first work step, the final dimensions required are not yet achieved has attained. If you want to produce a series of connecting pieces along the upper generatrix of the collecting pipe at generally constant intervals, the distance between the guide hole q and the axis of the punch is determined on the distance that is provided as the distance between two successive connecting pieces, and sets tighten the guide hole q using the screw q ¹ . The pin ρ is also fixed at the same distance from the axis of the die / by means of the screw p ^2. Claim: Device for necking consecutive connecting pieces on a collecting pipe or boiler, which has a lifting mechanism that can be inserted into the inside of the tube and controls the necking punch and a die that can be attached against the circumference of the tube and can be moved along the tube together with the lifting mechanism, as well as means for aligning the lifting mechanism or punch with the Neck axis, characterized in that the alignment means are arranged on the die carrier (m) through a neck opening of the tube, in the manner of a catch pin lock, from a guide bore (q) provided on the lifting mechanism (/) and a guide hole (q) which engages in it when the die (/) is applied through a throat opening of the pipe There are guide pins (p) . Considered publications:
German patent specifications No. 389 507, 749 707,
857 789. 1 sheet of drawings © 909 558/176 6.59