EP3427897A1 - Device for processing tubes and other round objects - Google Patents

Abstract

The invention relates to a device for processing pipes (R) and other round bodies (S) and contains a) a Wälzkörperhalterung (200) with at least one rotatably mounted rolling elements (204), which pressure on a in the pressing space (P) of the Wälzkörperhalterung round body a movable support (203) on which the rolling element (204) is rotatably mounted and which is pivotally mounted on the Wälzkörperhalterung (200), and with a rotatable eccentric shaft (209), which is scanned by the carrier (203) ; and b) a handle (100) in which the rolling element holder (200) can be rotatably mounted about a working axis (A) passing through the pressing space (P).

Description

The invention relates to a device for processing of round bodies, in particular for pressing round bodies such as pipes or of support sleeves, with which pipes and / or fittings are to be connected.

From the DE 103 42 172 A1 a device for rotational operations is known, which can be used in particular for the pressing of round bodies. The device includes a handle and a Wälzkörperhalterung which is rotatably mounted in the handle in one direction. About radially inwardly adjustable rolling elements can be pressed with such a device grooves in a pipe joint.

From the EP 1 712 316 A1 , the US 4,769,911 , the US 5 528 919 and the US 2010/166516 A1 Devices are known for rotational operations in which a rolling element holder is rotatably mounted in a handle and the rotation is done for example via a coupled power tool.

From the US 2,587,186 For example, there is known a hand tool for chopping nuts and the like, which includes a hand-rotatable cylindrical rubbing drum with outwardly facing rub tips. The rubbing drum is rotatably mounted in a first half-shell, which is arranged at the first end of a handle. The other end of the handle is pivotally connected to one end of a bracket, the other end has a cylindrically curved pressure surface, with which regrind can be pressed onto the rubbing drum.

From the DE 25 11 942 B1 a device for pressing metal sleeves on hoses is known, in which radially displaceably mounted jaw body cause the desired compression by radial inward movement. The radial inward movement of the jaw body is generated by a rotation of annular plates which surround the jaw members in an annular manner and have at their inner contour in the circumferential direction inclined pressure surfaces with which they press the jaw body radially inwardly.

Against this background, it was an object of the present invention to provide improvements for a device of the type described above.

This object is achieved by a device having the features of claim 1. Advantageous embodiments are contained in the subclaims.

The invention relates to a device for processing round bodies, in particular for pressing tubes, which contains the following components: a) A Wälzkörperhalterung with at least one rotatably mounted rolling elements, which can exert pressure on a located in the pressing space of Wälzkörperhalterung round body, with a movable support to which the rolling element is rotatably mounted and which is pivotably mounted on the Wälzkörperhalterung, and with a rotatable eccentric shaft which is scanned by the carrier, and b) a handle in which the Wälzkörperhalterung can be rotatably supported about a working axis, by the Press room leads.

By rotation of the rolling element holder relative to the handle about the working axis, a round body located in the press room and extending along the working axis can be circumferentially machined by the rolling element pressing on it rotating around the round body.

Since the eccentric shaft has a non-circular or non-concentric contour with respect to its axis of rotation, on which the carrier of the rolling element with At least one sampling point is applied, the sampling point of the carrier is moved according to the scanned contour upon rotation of the eccentric shaft. Due to the scanning of the rotatable eccentric shaft by the pivoting carrier can thus be realized in a simple and robust way a quasi-arbitrary "program" of the radial displacement of the rolling element mounted on the carrier. Thus, it can be ensured that the rolling element guided around a round body is gradually adjusted radially inwards in accordance with the progress of the pressing. The progression of the adjustment program can be controlled in a simple manner by the rotation of the eccentric shaft.

According to one embodiment of the invention, the devices may optionally include a locking mechanism by which the rotation of the rolling element holder can be locked relative to the handle in one direction. In this way it can be achieved that the Wälzkörperhalterung can be rotated by a reciprocating motion of the handle in a direction around the pressing space a round body. Further explanations of such a mechanism are in the DE 103 42 172 A1 to find.

The handle may have a drive shaft to which a manual or mechanical rotary drive can be attached, wherein rotation of the drive shaft causes a rotation of the rolling element relative to the handle to the working axis. The drive shaft may be formed, for example, as a pin of round or polygonal cross-section, which fits into the drill chuck of a drill or a cordless screwdriver, so that the drive shaft can be machined. Furthermore, such a (polygonal) shaft optionally also a wrench can be applied, for example, a ratchet wrench to turn the drive shaft manually. The rotation of the drive shaft can be implemented, for example via gears in a rotation of Wälzkörperhalterung relative to the handle.

According to one application, the rolling element can also be or contain a cutting blade. Then z. B. pipes are cut off with the device.

The support for the rolling element can in particular be a one-armed or two-armed lever, at one end of which the rolling element is mounted. Another point of the lever, for example with a two-armed lever the opposite end, can then make the scanning of the eccentric shaft. With the help of the lever, it is possible to generate very large compressive forces on the rolling elements.

According to one embodiment of the invention, the Wälzkörperhalterung may contain two or more rolling elements which scan different contours of the eccentric shaft. Each of the processing body is thus adjusted radially according to its own program, the programs of the plurality of rolling elements are preferably coordinated. For example, in the case of three machining bodies, first the first to a maximum value can be adjusted radially inward, then the second, and finally the third. In this way, it is achieved that only one of the machining bodies carries out an active machining (eg a compression) at a given time, so that overall the force required for the compression remains limited.

In embodiments of the invention in which two or more processing bodies are present, they are preferably arranged axially spaced with respect to the working axis. When rotating around a round body, each processing body thus acts on a different circumferential line.

According to one embodiment of the embodiment described above, the eccentric shaft rotates stepwise, namely with a respective rotational thrust at certain angular positions of the rolling element relative to the handle. For example, elements may be provided on the rolling element holder which contact the handle in the aforementioned angular positions and thereby provide a rotational thrust of the eccentric shaft. In particular, a rotational push to be triggered by a certain (small) angle of rotation after each full 360 ° revolution of the Wälzkörperhalterung in the handle.

For the specific embodiment of the above-described mechanisms on the eccentric shaft, there are various possibilities. In particular, a gear can be provided on the eccentric shaft, in which engages a movable pawl of Wälzkörperhalterung. By such a pawl and a corresponding shape of the gear, on the one hand, a ratchet mechanism can be realized, which allows the rotation of the eccentric shaft only in one direction. Furthermore, by means of the pawl also an active (stepwise) rotation of the eccentric shaft can be generated by the pawl is pressed in the reverse direction and thereby entrains the eccentric shaft. After completion of such a rotation thrust, the pawl can then go back to the starting position without taking the eccentric shaft.

For machining a round body, this is to be introduced into the press room of the rolling element holder. If the rolling element holder surrounds the pressing space in an annular manner, the round body can only be introduced from the side into the pressing space. This is unfavorable or even impossible with long pipes. In order to introduce the round body (tubes) into the pressing space of Wälzkörperhalterung even in such cases, the latter is preferably constructed of at least two components which can be separated for insertion of the round body in the press room and then closed in a ring around the round body. For example, the Wälzkörperhalterung consist of two partial circles, which together form a ring and which are hingedly connected together at one end, so that they can be transferred to an open position and a closed position.

According to one embodiment of the invention, the handle can have storage means for a positive engagement on the workpiece. For example, the handle may have key surfaces which engage an external hexagonal shape of the workpiece in order to fix it rotationally fixed relative to the handle.

Fig. 1

eine erfindungsgemäße Vorrichtung zum Verpressen von Rundkörpern im geöffnetem Zustand der Handhabe vor Aufnahme einer Wälzkörperhalterung, welche bereits um eine Arbeitsachse geschlossen ist, wobei Seitenteile der Handhabe zur besseren Erkennbarkeit abgerückt sind,

Fig. 2

die Vorrichtung von Fig. 1 im zusammengebauten Zustand der Handhabe,

Fig. 3

die Vorrichtung von Fig. 1 bei Eingriff der Wälzkörperhalterung in die Handhabe, wobei Seitenteile der Handhabe wiederum zur besseren Erkennbarkeit abgerückt dargestellt sind,

Fig. 4

eine separate perspektivische Ansicht der Wälzkörperhalterung mit abgerücktem Seitenteil aus einer ersten Ansichtsrichtung,

Fig. 5

die Wälzkörperhalterung von Fig. 4 aus einer zweiten Ansichtsrichtung,

Fig. 6

eine perspektivische Explosionsansicht der Wälzkörperhalterung,

Fig. 7

eine perspektivische Explosionsansicht der Handhabe,

Fig. 8

eine Stützhülse vor Einsetzen eines Kunststoffrohres,

Fig. 9

die Stützhülse von Fig. 8 nach Einsetzen und Verpressen des Kunststoffrohres,

Fig. 10

die erfindungsgemäße Handhabe mit Schlüsselflächen für den Angriff an einer Presshülse, wobei zur besseren Erkennbarkeit die Wälzkörperhalterung weggelassen und ein Seitenteil abgedrückt dargestellt ist,

Fig. 11

die Handhabe von Fig. 10 mit den Seitenteilen in Arbeitsstellung,

Fig. 12

eine perspektivische Ansicht der in den Fig. 10 und 11 verwendeten Presshülse,

Fig. 13

eine Schnittansicht der in den Fig. 10 und 11 verwendeten zweiseitigen Stützhülse und

Fig. 14

eine perspektivische Ansicht der in den Fig. 10 und 11 verwendeten zweiseitigen Stützhülse.

In the drawing, the invention will be explained in more detail by way of example. Showing:

Fig. 1

an inventive device for pressing of round bodies in the open state of the handle before receiving a Wälzkörperhalterung, which is already closed about a working axis, wherein side parts of the handle are moved away for better visibility,

Fig. 2

the device of Fig. 1 in the assembled state of the handle,

Fig. 3

the device of Fig. 1 upon engagement of the Wälzkörperhalterung in the handle, with side parts of the handle are shown in turn moved away for better visibility,

Fig. 4

a separate perspective view of the Wälzkörperhalterung with abgegezogenem side part from a first viewing direction,

Fig. 5

the rolling element holder of Fig. 4 from a second viewing direction,

Fig. 6

an exploded perspective view of the rolling element holder,

Fig. 7

an exploded perspective view of the handle,

Fig. 8

a support sleeve prior to insertion of a plastic tube,

Fig. 9

the support sleeve of Fig. 8 after insertion and compression of the plastic pipe,

Fig. 10

the handle according to the invention with key surfaces for the attack on a compression sleeve, wherein for better visibility the Wälzkörperhalterung omitted and a side part is shown pressed down,

Fig. 11

the handle of Fig. 10 with the side parts in working position,

Fig. 12

a perspective view of the in the Fig. 10 and 11 used compression sleeve,

Fig. 13

a sectional view of the in the Fig. 10 and 11 used two-sided support sleeve and

Fig. 14

a perspective view of the in the Fig. 10 and 11 used two-sided support sleeve.

With the help of Fig. 1 to 7 a device according to the invention for pressing of round bodies, for example of pipes, will be explained in more detail. As in Fig. 1 can be seen, the device consists essentially of two components, namely, a handle 100 as well as a rolling element holder 200 separable therefrom. The rolling element holder 200 serves to receive a round body (not shown) to be processed in a pressing space P, the rolling body holder subsequently being rotated about a working axis A passing through the pressing space P, can work on the round body from all sides. The machining consists in particular in that rolling elements 204 press in the form of pressure rollers on the round body and so for example encircle circumferential grooves in this. In the illustrated embodiment, three rolling elements 204 are provided, which are arranged offset in the direction of the working axis A and which can each rotate about an axis parallel to the working axis A.

The aforementioned pressure rollers are just one example of the general case of "rolling elements" with which a workpiece can be machined under pressure. Another example of a rolling element 204 is a cutting blade (eg disc-shaped), with which a pipe or the like can be cut off. The following explanations thus also apply analogously to other rolling elements 204. Furthermore, it is possible for different types of rolling elements to be interchangeably mounted, so that the device can be easily converted for different applications.

During a machining operation, said rolling element holder 200 is mounted in the handle 100. The inclusion of Wälzkörperhalterung 200 in the handle 100 is gradually in the Fig. 1 . 2 and 3 illustrated. In the Fig. 1 and 2 is the handle 100 in an open state in which a clamping lever 108 is issued from a handle 113. Since the cocking lever 108 and the handle 113 are rotatably connected via a bearing pin 114, components of the handle 100 fastened in this way at the opposite ends can be moved apart like tongs. These components comprise, in particular, a first bearing shell in the form of a key disk 102 and a mirror-inverted second bearing shell in the form of a guide disk 110 Condition of handle 100 and rolling element holder 200 ( Fig. 3 ) is the Wälzkörperhalterung 200 with a side plate 202 in a form-fitting manner in the key plate 102. On the opposite side, the guide plate 110 engages with an inner collar in the opening of a gear 207, 208 on the Wälzkörperhalterung. Key pulley 102 and guide disk 110 have been joined together axially by closing the "pliers" of handle 113 and clamping lever 108 so that they include the Wälzkörperhalterung 200 firmly (except for a rotational mobility) between them.

Furthermore, the guide disk 110 and / or the key disk 102 can optionally be shaped and dimensioned in such a way that they form-fittingly engage corresponding key surfaces of the round body (pipe, compression sleeve, etc.) to be machined, and thus prevent it against rotation (together with the rolling body support 200). can fix. Additionally or alternatively, an axial fixation on the round body can be carried out in this way.

Like, for example Fig. 2 can be seen, the handle 100 has a drive shaft 111 which protrudes laterally from a support bearing plate 104. The drive shaft 111 has at its end a polygonal cross section, to which, for example, a polygonal wrench or ratchet wrench for a manual rotation of the drive shaft can be attached. In particular, however, the chuck of a machine, such as a drill or a cordless screwdriver, can be used to machine the shaft 111 to rotate relative to the handle 100 can.

How out Fig. 3 can be seen, a (small) gear 116 is mounted in the axially inner region of the shaft 111, which engages in the assembled state of handle 100 and Wälzkörperhalterung 200 in the gear 207, 208 of the Wälzkörperhalterung. A rotation of the drive shaft 111 thus leads to a rotation of the Wälzkörperhalterung 200 about the working axis A. Thus, it is possible in a simple manner, with standard tools (cordless screwdriver, drill) make a roll crimping with the device according to the invention. Should a mechanical rotary drive not available or not be used for other reasons, it can optionally be done manually by pressing a corresponding tool key is attached to the drive shaft 111 and moved by hand.

Furthermore, it is possible to provide a locking mechanism between the handle 100 and the Wälzkörperhalterung 200, which allows rotation of the tool body holder 200 only in one direction of rotation. This could be achieved, for example, by a pawl (not shown) mounted on the handle 100 meshing with the teeth of the toothed wheel 207, 208 and thus allowing rotation of the roller body support 200 in one direction only. With such a mechanism, a rotation of the Wälzkörperhalterung could be generated by a round body by an oscillating reciprocation of the handle (see. DE 103 42 172 A1 ).

In the 4 and 5 separate views of Wälzkörperhalterung 200 are shown, wherein for better visibility of the inner parts, the side plate 202, the clamping lever 206, and a pawl 216 are shown detached. From the Fig. 4, 5 In particular, the mechanism for a radial readjustment of the rolling elements 204 can be seen. The rolling elements 204 are each mounted rotatably on a carrier / lever 203, wherein the lever 203 in turn about pivot pin 205 are pivotable. The rolling elements 204 opposite end of the lever 203 abuts an eccentric shaft 209, wherein each of the three existing lever 203 scans another contour of the eccentric shaft 209. By rotation of the eccentric shaft 209 about its axis, each of the rolling elements 204 can thus be radially adjusted according to its own program. In particular, it is possible that initially only a first rolling element 204 is moved radially inwardly until it has reached an end position. Subsequently, a second rolling element is moved radially inwardly until it has reached its final position. Finally, finally, the last rolling element is moved radially inward until it reaches its final position. Upon further rotation of the eccentric 209 all scanned contours can then jump back to their original value, whereby the rolling elements 204 back to their radially outer starting position and thus release the machined pipe for removal. The various scanned contours of the eccentric shaft 209 are best viewed in the exploded view of FIG Fig. 6 recognizable.

In order to continue the eccentric shaft 209 in the course of a pressing operation and thus to adjust the rolling elements 204 according to the program radially, a latching disc 210 is provided at each end of the eccentric shaft 209. In the teeth of these locking discs 210 each engage pawls 216, which on a clamping lever 206 and a counter-holder 212 (FIGS. Fig. 6 ) are stored. The pawls ensure on the one hand that the eccentric shaft 209 can only rotate in one direction of rotation. On the other hand, by pivoting the clamping lever 206, an active rotational thrust of the eccentric shaft 209 can be generated by the pawl 216 engaging in the locking disk 210 entraining the eccentric shaft 209. Such a rotation thrust is always generated when the outwardly projecting nose of the clamping lever 206 abuts the handle 100 and is therefore pivoted in a further rotation of the Wälzkörperhalterung 200 until it is past the stop and can jump back to the starting position (see. Fig. 3 ). After each complete 360 ° rotation of the Wälzkörperhalterung 200 in the handle 100 thus the eccentric shaft 209 is further rotated a short distance and thus the radial adjustment of the rolling elements 204 one step forward.

With the mechanism described, the radial adjustment of the rolling elements 204 can be easily adapted to different types of pipes to be pressed by a tube-specific eccentric shaft 209 is inserted into the Wälzkörperhalterung 200.

In the Fig. 1 to 5 the Wälzkörperhalterung 200 is shown closed annular. In this state, it can only be slipped over from the front side over a pipe (not shown). If this is not possible, the Wälzkörperhalterung 200 can also be opened to the side of a Pipe to be put on. After placing the rolling element holder can then be closed around the pipe. For unfolding, the gear on the side of the rolling body holder is formed, for example, in two parts from a C-shaped segment 207 and a shorter flap segment 208, which parts can be unfolded if necessary. In Fig. 4 In this regard, a pivotable bracket 213 can be seen, which connects the pressure shell 201 and the flap segment 208 of the gear with the rest of the Wälzkörperhalterung in the closed state. By disengaging this clip, the said parts can then move about an axis X ( Fig. 5 ), whereby the ring of Wälzkörperhalterung opens.

Fig. 8 shows a one-sided support sleeve S (press sleeve) before attaching an associated plastic pipe R on the provided with annular gaps support sleeve. The state after the insertion of the plastic pipe R and after the compression of the support sleeve S and plastic pipe R with the device according to the invention is in Fig. 9 shown. Clearly visible are three compression grooves V, which were generated by the rolling elements 204.

Of course, any other workpieces / fittings can be processed or pressed with the device, in particular double nipple to which a tube can be connected on both sides (mirror-symmetrical).

During the pressing, the radial (circumferential) and the axial position of the handle on the workpiece (for example the support sleeve S and the plastic tube R of FIG Fig. 8, 9 ) fixed. For example, a positive engagement can take place on a non-circular outer contour of the workpiece (in particular on wrench surfaces) or on radially protruding collar of the workpiece.

The above possibilities are in the Fig. 10-12 explained in more detail for a special case. For better clarity is in the Fig. 10 and 11 the Wälzkörperhalterung not shown. Shown is a tube R, which is to be connected by a compression sleeve H with a two-sided support sleeve S '(double nipple). From the support sleeve S 'is in the Fig. 10 and 11 only the right half to see. In contrast to the support sleeve S of 8 and 9 this support sleeve S 'is formed on both sides and a mirror image, wherein the non-visible part of the tube R and the compression sleeve H is covered. Fig. 10 thus shows on the left a page prepared for pressing and on the right a still free side of a two-sided support sleeve S '.

The figures further show a handle 100 of the type described above in which substantially only the key plate 102 'is different from the previous embodiments. The key disk 102 'is in fact provided with key surfaces with which it can engage the outer hexagon AS of the compression sleeve H in order to support the sleeve in a rotationally fixed manner relative to the handle 100. In this way, co-rotation of the compression sleeve H during the pressing process is excluded.

As Fig. 10 can still recognize, the guide plate 110 'of the handle 100 is mounted in a receptacle N of the workpiece to be pressed with lateral stops to fix this in the axial direction. A separate perspective view of the compression sleeve H with the external hexagon AS is in Fig. 12 shown.

Fig. 13 shows a side view (right partially in section) and Fig. 14 a perspective of the two-sided support sleeve S 'of Fig. 10 and 11 , Symmetrical to the central receptacle N has the support sleeve S 'two extensions with circumferential sealing teeth on the outer surface, which dig when pressed into a tube. Furthermore, optionally, an anti-rotation device can be provided, which prevents rotation between the support sleeve S 'and a plugged-on tube (during compression and also later in continuous use with flowing media in the load change of hot / cold liquids and pressure surges in the pipe system). The anti-twist device may for example consist of a knurling (not shown), which preferably in the area marked "X" near the receptacle N on the outer surface of the support sleeve S 'and / or attached to the seal teeth (eg realized by approximately 1 mm deep and approximately 1 mm wide grooves).

Preferably, the key disks 102, 102 'and the guide disks 110, 110' and optionally also the side plate 101 and the support bearing 104 are interchangeable or easily convertible in order to process different pipe and workpiece diameters. Advantageously, a set of these elements can be used in each case for a range of pipe diameters (for example, 20-40 mm, 50-110 mm).

Claims (9)

Apparatus for processing pipes (R) and other round bodies (S) comprising: a) a Wälzkörperhalterung (200) having at least one rotatably mounted rolling elements (204) which can exert pressure on a in the pressing space (P) of the Wälzkörperhalterung round body, with a movable support (203) on which the rolling elements (204) rotatably mounted and which is pivotably mounted on the Wälzkörperhalterung (200), and with a rotatable eccentric shaft (209), which is scanned by the carrier (203); b) a handle (100) in which the Wälzkörperhalterung (200) rotatably supported about a working axis (A) can be stored, which leads through the pressing space (P). Apparatus according to claim 1, characterized in that it comprises a locking mechanism by which the rotation of the Wälzkörperhalterung (200) relative to the handle (100) can be locked in one direction. Apparatus according to claim 1 or 2, characterized in that the handle has a drive shaft (111) for the approach of a manual or mechanical rotary drive, wherein a rotation of the drive shaft causes a rotation of the Wälzkörperhalterung to the working axis. Device according to one of claims 1 to 3, characterized in that the rolling body (204) is a cutting blade. Device according to one of claims 1 to 4, characterized in that it contains two or more rolling elements (204) and associated carrier (203) which scan different contours of the eccentric shaft (209). Device according to one of claims 1 to 5, characterized in that the eccentric shaft (209) can rotate only in one direction of rotation. Device according to at least one of claims 1 to 6, characterized in that the eccentric shaft (209) is rotated when the Wälzkörperhalterung (200) in the handle (100) rotates. Device according to one of claims 1 to 7, characterized in that the Wälzkörperhalterung (200) at least two components (207, 208), which can be separated to insert a round body in the pressing space (P) and then closed in a ring around the round body. Device according to one of claims 1 to 8, characterized in that the handle (100) has storage means (102 ') for a positive fit on the workpiece (H).

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