DE19747657B4 - beading machine - Google Patents

Abstract

contraption for the production of chip-free bead-like indentations in the form of Round threads or internal beads (21) at the end region of a tube (20) using a tool equipped with forming tools (10) tool carrier (29), this being aligned with the end region of the tube (20) and in cooperation with the tube (20) at least one indentation (21) formed by predetermined depth, wherein the forming tools (10) on her tool carrier (29) are rotatably mounted, the tool carrier (29) relative to the axis (x-x) of the tube (20) is arranged rotatable about this, the tube (20) is fixedly arranged in a vice (28), wherein the forming tools Rotation rollers (10) are, with their bearings (9) in star-shaped radial guide elements (18) stored and with restoring elements (13) are connected, characterized in that the device one on a stand (1) arranged machine housing (2) having a drive shaft (3), whose one end with a Drive (4) communicates, and the other end with a cup-shaped, unilaterally open, rotationally symmetrical hollow body ...

Description

The The invention relates to a device for producing machining-free bead-like indentations For example, from round threads, inside beads or the like at the end a pipe using a tool equipped with forming tools Tool carrier, this aligned with the end portion of the tube and in cooperation with the tube forms at least one indentation of predetermined depth, wherein the forming tools are rotatably mounted on their tool carrier, the tool carrier relative to the axis (x-x) of the tube arranged rotatable about this is, the tube is fixed in a vise, wherein the Forming tools are rotating rolls, with their bearings in star-shaped - radial guide elements stored and with restoring elements are connected.

The Apply beads or sickle-like Deformations at the end of a pipe will be in the installation technique often required, occasionally also on the construction site, with in Adaptation to different pipe diameters and pipe wall thicknesses respectively different devices are needed with different tool sets.

It are known in the art thread rolling and trimming machines, for thread rolling, beading, beading and trimming of sheet metal hollow bodies be used. Such machines are for stationary use in the machine shop, but less for a construction site suitable. In general, the tool carriage of these forming machines guided by linear units, the tools are firmly clamped and that by a hollow spindle supplied pipe is rotated relative to the tools.

Such devices are in US 23 33 860 . US 20 54 182 . US 15 96 538 and DE 28 47 736 A1 described.

With the generally known forming machines, which are also known as thread rolling and trimming machines are called, but it is not possible, too to provide curved areas at one pipe end with a bead, and just as little the beading tools are integrated into a processing line, wherein, for example, first axial upsets are performed on a pipe and wherein in a second step to these compressions inside beads be attached or vice versa.

outgoing From the prior art, the invention is the task underlying, an improved device for machining-free molding of internal beads or the like at the end portion of a pipe of the in the preamble of claim 1 specified type show. The forming device should be able to bent parts at the pipe end with a To provide beading or the like, the bead head in a Forming line or processing line with other forming units can be integrated.

to solution the object is in a device in the preamble of claim 1 mentioned that this one arranged on a stand machine housing having a drive shaft having one end with a drive and the other end with a cup-shaped, one side open, rotationally symmetrical hollow body is formed, that the hollow body both at its edge region and in its cavity area has conical guide surfaces, in cooperation with conical guide surfaces of the rotating roller bearings as parking areas are formed.

there are device-like embodiments provided according to the further subclaims.

Thereby, that according to the invention the workpiece, namely the Tube is firmly clamped and the tool carrier under steady concentric Positioning of the forming tools about the axis of the tube in rotation is offset, there is the further advantage that even curved Parts at the pipe end can be provided with a bead, and that the tool carrier with other tool carriers and other forming tools integrated into a processing line can be.

So can e.g. only axial upsetting on a pipe is carried out and in the second step, these stings are applied to internal beads or vice versa.

Next Deformations at the pipe end, the system by using other tools, eg. also for cutting without cutting by means of separating rollers or for cutting Separating be used by using cutting tools. About that In addition, the system can be extremely uncomplicated compared to other devices and manufactured inexpensively and operated.

A Embodiment provides that as forming tools rotation rollers used and in the radial direction relative to the axis of the reshaping Each tube at 120 ° in Offset circumferential direction, guided to ensure a consistent power transmission.

The Sickenkopf can due to its kom Compact size can be used well in a combination machining. Because of their geometry, some parts have to be axially compressed (possibly several steps), then machined with the roller head and finally crimped or machined. In this way, entire contours can be generated at the end of the pipe.

Inventive embodiments the device as well as further details, features and advantages The invention will become apparent from the following explanation an embodiment schematically shown in the drawings. Show it

1 in side view a device for producing internal beads on a pipe, partly in section,

2 a view of the tool carrier with the deformation tools seen in the direction of the tube axis.

In the 1 shown apparatus for the production of chip-free sickle-like indentations, in this case for the production of internal beads at a pipe end, has a hanging on a stand arranged machine housing 2 with a vertically arranged drive shaft 3 on, whose upper end with a drive 4 namely with an electric motor 24 communicates. The electric motor 24 is using a standard gear ratio 25 with the drive shaft 3 connected. The drive shaft is in the machine housing 2 in each axial / radial bearings 22 . 23 stored. Camps 22 . 23 are from a bearing sleeve 27 taken, the center of a piston 32 wearing. The piston 32 forms in a cylinder 33 of the machine housing 2 along with an upper, the drive shaft 3 surrounding pressure chamber 30 and with a drive shaft 3 surrounding lower pressure chamber 31 a hydraulic piston / cylinder unit 11 out. The pressure chambers 30 . 31 are via connection channels 34 . 35 with - not shown - hydraulic pressure sources connected in a conventional manner and thus allow a forced by hydraulic forces caused upward or downward movements of the drive shaft 3 relative to the machine housing 2 ,

The at its upper end - as shown - with the electric motor 24 associated drive shaft 3 is at the bottom with a cup-shaped, down to open, rotationally symmetric Hohlkör by 5 formed, the conical guide surfaces both at its lower edge region and in its upper cavity portion 6 . 7 which, in cooperation with conical guide surfaces 14 . 15 the rotation roller bearings 9 are formed as contact surfaces. The hollow body 5 is from one on the machine housing 2 freely rotatable in an axial / radial bearing system 26 mounted guide sleeve 8th surrounded, which radial guide elements 18 ( 2 ) with bearings 9 for the concentrically adjustable rotation rollers 10 has. The rotating rollers 10 stand with reset elements 13 in conjunction and by this example. At a relative upward movement of the drive shaft 3 set back radially outward, in which case the beading tools or the rotating rollers 10 open outward in a star shape and the tube 20 after pressing in the beads 21 release.

Further shows 1 in that in the center of the hollow body 5 an inner spine 16 in a storage 17 is freely rotatably mounted and as a support member for the pipe 20 acts.

2 shows, in the direction of the axis of pipe 20 and drive shaft 3 seen, the rotating rollers 10 and their storage 9 and their star-shaped radial guide elements 18 with star-shaped sliding guides 12 for the bearings 9 the rotating rollers 10 , Furthermore, it is off 2 the arrangement of the return elements 13 seen. These are together with the radial guide elements 18 on the guide sleeve 8th arranged.

1 and 2 further show that the guide sleeve 8th the hollow body 5 bell-shaped overlaps and slidably receives. The pipe to be machined is clearly visible in the center of the machine system. The arrangement of the forming elements shows that the rotating rollers 10 about axes of storage 9 are rotatably mounted to friction forces relative to the pipe 20 to avoid. Furthermore, a constant power transmission from the rotating rollers 10 on the pipe 20 thereby ensuring that the three forming rollers 10 offset by exactly 120 ° on the pipe 20 incident. The pipe end is additionally over the inner mandrel 16 with his storage 17 supported during processing. As described above, the rotation rollers become 10 for molding in the beads 21 in the pipe 20 from the outside on the pipe in the manner employed (arrow 7 ), that with the help of the piston / cylinder unit 11 a relative movement R of the drive shaft 3 is brought about and due to the relative movement R, the storage 9 the rotating rollers 10 along the Anstellflächen 14 . 15 moves and as a result of the radial concentric Anstellweg Z arises.

The described device for producing internal beads on pipes is technically uncomplicated and compact, relatively inexpensive to produce and versatile. It is suitable due to its low Design volume and their comparatively low weight optimally for mobile use on construction sites and thus fulfills it in an ideal way the initially asked task.

It is also possible to design the device for larger power ranges (pipe diameter / pipe wall thickness). The delivery of the rotating rollers 10 then does not take about circular tours, as in 1 is shown, but on milled guides, which are provided with a plurality of holes, so that various forming tools can be repositioned. The respective optimum configuration is left to the constructive experience of the person skilled in the art, for example, the device can also be embodied as a horizontal machine and, on a case-by-case basis, with automatic feeds for pipe end sections.

1

stand

2

machine housing

3

drive shaft

4

Drive, electric motor

5

hollow body

6

Guide surface / attack surface

7

Guide surface / attack surface

8th

guide sleeve

9

storage

10

rotating rollers

11

Piston / cylinder unit

12

star-shaped sliding guide

13

Restoring elements

14

Guide surface / attack surface

15

Guide surface / attack surface

16

inner mandrel

17

storage

18

radial guide elements

20

pipe

21

interior beading

22

storage

23

storage

24

E-Motor

25

gear ratio

26

Axial / radial bearing system

27

bearing sleeve

28

vice

29

tool carrier

30

upper pressure chamber

31

lower pressure chamber

32

piston

33

cylinder

34

connecting channel

35

connecting channel

Claims (5)

Device for producing chip-free bead-like indentations in the form of round threads or internal beads ( 21 ) at the end of a pipe ( 20 ) using a forming tool ( 10 ) tool carrier ( 29 ), this to the end of the tube ( 20 ) and in cooperation with the tube ( 20 ) at least one indentation ( 21 ) of predetermined depth, wherein the forming tools ( 10 ) on her tool carrier ( 29 ) are rotatably mounted, the tool carrier ( 29 ) relative to the axis (xx) of the tube ( 20 ) is arranged around this rotatable, the tube ( 20 ) in a vice ( 28 ), wherein the forming tools rotate ( 10 ), with their bearings ( 9 ) in star-shaped radial guide elements ( 18 ) and with reset elements ( 13 ), characterized in that the device is attached to a stand ( 1 ) arranged machine housing ( 2 ) with a drive shaft ( 3 ) having one end with a drive ( 4 ), and the other end with a cup-shaped, one-sided open, rotationally symmetrical hollow body ( 5 ) is formed, that the hollow body ( 5 ) at both its edge region and in its cavity area conical guide surfaces ( 6 . 7 ) in cooperation with conical guide surfaces ( 14 . 15 ) of the rotary roller bearings ( 9 ) are formed as contact surfaces. Device according to claim 1, characterized in that the hollow body ( 5 ) of one on the machine housing ( 2 ) freely rotatably mounted guide sleeve ( 8th ), which radial guide elements ( 18 ) with bearings ( 9 ) for the concentric rotatable rollers ( 10 ) owns. Apparatus according to claim 1 or 2, characterized in that the drive shaft ( 3 ) in the machine housing ( 2 ) between a first surrounding pressure space ( 31 ) with a piston attached to it ( 32 ) to form a hydraulic piston / cylinder unit ( 11 ) relative to the machine housing ( 2 ) is arranged axially forcibly displaceable. Device according to one of claims 1 to 3, characterized in that in the center of the hollow body ( 5 ) an inner spine ( 16 ) in a storage ( 17 ) freely rotatably arranged and as a support element for the pipe ( 20 ) is trained. Device according to one of claims 1 to 4, characterized by their application in a combination machining of pipe ends in a processing line with the processing steps: On or multi-stage upsetting and / or molding of beads and / or beads and possibly further machining.