DE202020005765U1 - Device for centering a component - Google Patents

Abstract

Device for centering a component (4), which has at least one rotationally symmetrical area, opposite a centering axis (15) with a centering device which is arranged symmetrically to the centering axis (15) and partially encloses the rotationally symmetrical area of the component (4), the centering device having a plurality of an iris diaphragm mechanism, has actuating arms (10,7) which are positively coupled to one another and can be adjusted jointly via a single actuating element (2), each of which carries a guide roller (6) at the free end, with all guide rollers (6) each on a common circular arc around the centering axis (15), wherein a fixed, plate-shaped housing (9) is provided with a recess (14) for receiving the component (4), wherein a link element (8) non-rotatably connected to the actuating element (2) about the centering axis ( 15) is arranged pivotably on the housing (9), the link element ( 8) has guide recesses which cause the adjusting arms (10, 7) to be adjusted when the link element (8) is pivoted relative to the housing (9), characterized in that two first adjusting arms (10) are mounted on the housing at the end remote from the guide rollers (6). (9) are rotatably mounted and each have a first link pin (12), which is guided in a first link guide (12a, 12b) of the link element (8), and that two second adjusting arms (7) on the guide rollers (6) facing away End on the housing (9) are rotatably mounted and each have a second link pin (17), each in a second link guide (17a, 17b) of the link element (8) is guided.

Description

The invention relates to a device for centering a component, which has at least one rotationally symmetrical area, relative to a centering axis with a centering device which is arranged symmetrically to the centering axis and partially encloses the rotationally symmetrical area of the component actuating element has jointly adjustable actuating arms, each of which carries a guide roller at the free end, with all the guide rollers being arranged on a common circular arc around the centering axis in each adjustment position, with a fixed, plate-shaped housing being provided with a recess for accommodating the component, with a with the actuating element rotatably connected link element is arranged pivotably about the centering axis on the housing, wherein the link element has guide recesses, which at Ve Pivoting the connecting link element relative to the housing causes the adjusting arms to be adjusted.

Such a device is out DE 71 31 829 U known. This publication discloses a device with a housing and an annular link element, the actuating arms being adjusted by pivoting the link element relative to the housing, but using additional elements, namely deflection levers and sliding joints. This device is therefore structurally complex. Out of DE 851 710 B and DE 931 023 B other centering devices are known.

There are different applications where at least one component has to be centered exactly. For example, to join two rotationally symmetrical or partially symmetrical components using joining processes (e.g. welding) while maintaining a rotational axis, they must be aligned and mounted concentrically to one another. This is done by clamping the first component and aligning the second component to the axis of rotation of the first component. It is known that the second component is aligned using an adjustable centering device (e.g. Lynette).

To process long components on lathes, they must be measured and centered individually using a centering device (e.g. Lynette) in relation to the chuck. If the components are subject to tolerances or if different dimensions have to be processed, this alignment must always be carried out again.

After joining or after processing, the centering mechanism must be opened via an additional mechanism in order to remove the component or components. Alternatively, the components must be pulled out and removed axially from the centering mechanism, which can lead to difficulties with long components for reasons of space.

It is therefore the object of the present invention to significantly simplify the design of a device for centering a component and to maintain or improve exact centering.

This object is achieved according to the invention in a device of the type described at the outset in that two first actuating arms are rotatably mounted on the housing at the end facing away from the guide rollers and each have a first link pin, which is guided in a first link guide of the link element, and that two second Actuating arms are rotatably mounted on the housing at the end remote from the guide rollers and each have a second link pin, which is guided in a second link guide of the link element.

Centering and maintaining the centering axis is achieved automatically by the iris mechanism without additional measurement, control or regulation. No additional settings or adjustments are required. In every adjustment position, all guide rollers are always arranged on a common circular arc around the centering axis, so that the component is always precisely aligned with the centering axis.

Provision is preferably made for the guide rollers to be arranged in a semicircle. It is particularly preferred that the clear distance between the two outer guide rollers in the maximum opening position is greater than the diameter of the rotationally symmetrical area of the component. This design ensures that the respective component can be removed from the device in the radial direction after processing without an additional mechanism.

In a structurally preferred embodiment, it is provided that the plate-shaped housing has a semicircular recess for accommodating the component, which adjacent to the recess has several centering bolts arranged in a semicircular shape on a common circular arc around the centering axis and directed parallel to the centering axis, the link element having circular guide cutouts around the centering axis is arranged pivotably on the housing, with the link element having a half has a circular recess for receiving the component and is arranged with a guide cutout on a centering pin. When the actuating element is actuated (manually, hydraulically, pneumatically or electrically), the link element moves by means of its guide cutouts (limited) on an arc of a circle around the centering bolt and thus the centering axis.

In an embodiment that is particularly simple in terms of construction, it is provided that the two first actuating arms are articulated on a common centering bolt.

The first and second link guides are used to always "force" all guide rollers to a common circular path to the centering axis in every position of the first and second adjusting arms. They execute a superimposed path that is independent of the centering axis and result constructively from an interpolated path of movement of the link bolts, which are mounted in the actuating arms. Depending on the dimensioning of the device, these paths can also be "splines" in extreme cases or, theoretically, straight lines. In practice, of course, a circular path is aimed for, the center of which results randomly from the interpolation of the link bolt path or link guide. Three extreme points of the link bolts are determined structurally (starting point, end point and middle position) and these three points are connected by means of circular interpolation. However, they are not related to the actual centering axis and depend on a large number of dimensions (length of the adjusting arms, arrangement of the bores, pivot points in the link element, etc.).

• 1 eine perspektivische Darstellung einer erfindungsgemäßen Vorrichtung zur Zentrierung eines noch nicht in die Vorrichtung eingesetzten Bauteils,
• 2 die Vorrichtung nach 1 mit eingesetztem und zentriertem Bauteil,
• 3 eine Seitenansicht der Vorrichtung in halb geöffneter Position,
• 4 eine perspektivische Explosionsdarstellung eines plattenförmigen Gehäuses mit an diesen zu montierenden Zentrier- und Lagerbolzen,
• 5 das Gehäuse nach 4 mit montierten Zentrier- und Lagerbolzen,
• 6 eine perspektivische Explosionsdarstellung des Gehäuses nach 5 mit daran zu montierenden Stellarmen,
• 7 das Gehäuse mit auf die Zentrier- bzw. Lagerbolzen aufgesteckten Stellarmen,
• 8 das Gehäuse nach 7 mit an den ersten Stellarmen zu montierenden Kulissenbolzen,
• 9 das Gehäuse nach 8 mit montierten Kulissenbolzen,
• 10 das Gehäuse nach 9 vor der Montage weiterer Zentrierbolzen,
• 11 das Gehäuse nach 10 mit montierten Zentrierbolzen,
• 12 das Gehäuse nach 11 vor der Montage eines Kulissenelementes,
• 13 die im Wesentlichen vollständig montierte Vorrichtung,
• 14 bis 16 jeweils eine Seitenansicht der Vorrichtung mit Darstellung der Bewegung des Kulissenelementes in halb geöffneter Position (14), vollständig geöffneter Position (15) und vollständig geschlossener Position (16),
• 17 die Stellung der Stellarme in geschlossener Position,
• 18 die Stellung der Stellarme in geöffneter Position,
• 19 eine Seitenansicht der Vorrichtung in geschlossener Position,
• 20 eine Seitenansicht der Vorrichtung in geöffneter Position,
• 21 eine Seitenansicht der Vorrichtung in geschlossener Position mit darin zentriertem Bauteil und
• 22 eine Seitenansicht der Vorrichtung in geöffneter Position mit radial entnommenem bzw. einzuführendem Bauteil.

The invention is explained in more detail below with reference to the drawing. This shows in

• 1 a perspective view of a device according to the invention for centering a component that has not yet been inserted into the device,
• 2 the device 1 with inserted and centered component,
• 3 a side view of the device in a half-open position,
• 4 a perspective exploded view of a plate-shaped housing with centering and bearing bolts to be mounted on it,
• 5 the housing 4 with mounted centering and bearing bolts,
• 6 an exploded perspective view of the housing 5 with adjusting arms to be mounted on it,
• 7 the housing with the positioning arms attached to the centering or bearing bolts,
• 8th the housing 7 with link bolts to be mounted on the first adjusting arms,
• 9 the housing 8th with mounted link bolt,
• 10 the housing 9 before installing further centering bolts,
• 11 the housing 10 with mounted centering bolt,
• 12 the housing 11 before installing a backdrop element,
• 13 the substantially fully assembled device,
• 14 until 16 each a side view of the device showing the movement of the link element in the half-open position ( 14 ), fully open position ( 15 ) and fully closed position ( 16 ),
• 17 the position of the actuator arms in the closed position,
• 18 the position of the actuator arms in the open position,
• 19 a side view of the device in the closed position,
• 20 a side view of the device in the open position,
• 21 a side view of the device in the closed position with the component centered therein and
• 22 a side view of the device in the open position with a radially removed or inserted component.

A device for centering a component 4 is denoted generally by 1 . In the exemplary embodiment, the component 4 to be centered is a rotationally symmetrical, tubular body. However, it can also be a component that has only one rotationally symmetrical area that can be centered with the aid of the device 1 .

The device 1 is in the embodiment according to 1 and 2 arranged symmetrically to a centering axis 15 on a frame 18 . In addition, a clamping mechanism 3 for another component 5 is also arranged on the frame 18 , which is also designed to be completely rotationally symmetrical in the exemplary embodiment and is located symmetrically on the axis of rotation or centering 15 .

With the aid of the device 1 according to the invention, the component 4 should be automatically centered with respect to the centering axis 15 and thus the other component 5 in order to connect it to the other component 5 by welding or the like, for example. Of course, the device 1 can also be used to center a component 4 relative to a centering axis 15 for other purposes.

The device 1 has a centering device with a plurality of actuating arms 10, 7 which are forcibly coupled to one another via an iris mechanism described in more detail below and which can be adjusted jointly via a single actuating element 2, with both the first actuating arms 10 and the second actuating arms 7 each carrying a rotatably mounted guide roller 6 at the free end . The iris mechanism, which is described in more detail below, is designed in such a way that in each adjustment position all the guide rollers 6 are each arranged on a common circular arc around the centering axis 15 .

In the exemplary embodiment, four adjusting arms are provided, namely two first adjusting arms 10 and two second adjusting arms 7, which are arranged in a semicircle.

The device 1 has a stationary, plate-shaped housing 9 with a semi-circular recess 14 for receiving the component 4 . This plate-shaped housing 9 is connected to the frame 18 in the exemplary embodiment. A single plate-shaped housing 9 is sufficient for the function of the device; in the exemplary embodiments, two identical plate-shaped housings 9 are provided which are spaced apart axially along the centering axis 15 .

Adjacent to the recess 14, the housing 9 has a plurality of centering bolts 11 arranged in a semicircle on a common circular arc about the centering axis 15 and directed parallel to the centering axis 15; in the exemplary embodiment, three centering bolts 11 are provided.

A link element 8, which is non-rotatably connected to the actuating element 2 and has guide cutouts 11a in the form of a circular arc, is arranged on the housing 9 so that it can pivot about the centering axis 15, with the link element 8 also having a semicircular cutout 16 for receiving the component 4 and each having a guide cutout 11a on a centering bolt 11 is. The link element 8 can be a single plate-shaped link element; in the exemplary embodiment, it has two parallel, identically designed plates, which are spaced apart axially in the direction of the centering axis 15 .

For further structure of the device 1 is below on the 4 until 13 Reference is made, in which the assembly sequence of the device 1 is shown for the sake of clarity.

Starting from 4 has the plate-shaped housing 9 adjoining the semi-circular recess 14 on receiving bores not specified, in which first a centering pin 11 and two bearing pins 13 are inserted. The plate-shaped housing 9 also has a bearing web 19 for the actuating element 2 in an upper outer area, which is described in more detail below.

5 shows the position in which a centering bolt 11 and two bearing bolts 13 are mounted on the housing 9.

Two second actuating arms 7 and two first actuating arms 10 are then arranged on the housing 9 . The two second adjusting arms 7 each have an unspecified bore at the end facing away from the guide roller 6 for rotatably attaching them to the bearing bolts 13 . They are placed on the bearing bolts 13 accordingly. Approximately in the middle between the bearing bolts 13 and the guide rollers 6, the second actuating arms 7 each have second link bolts 17, the function of which is described in more detail below.

The two first adjusting arms 10 each have a through hole at the end facing away from the guide roller 6 , which is not designated in any more detail, by means of which they are both pushed together onto the centering pin 11 which has already been installed. Both first actuating arms 10 are thus articulated on a common centering pin 11 . After the two second actuating arms 7 have been attached to the bearing bolts 13 , the two first actuating arms 10 are attached to the centering bolt 11 . This mounting position is in 7 shown.

Both first adjusting arms 10 each have a receiving bore approximately in the middle between the centering pin 11 and the guide rollers 6, which is not designated in detail and into which a first link pin 12 is inserted ( 8th and 9 ).

After the first actuating arms 10 and the second actuating arms 7 have been arranged on the housing 9, two further centering bolts 11 are inserted into the housing 9. Then the gate element 8 is mounted. In addition to the arcuate guide cutouts 11a, this link element 8 has two first link guides 12a, 12b for interaction with the first link pin 12 and two second link guides 17a, 17b to interact with the second link pin 17. The link element 8 is attached to the housing 9, whereby after attaching ( 13 ) each centering pin 11 is recognizable within a guide cutout 11a, while a first link pin 12 is in the first link guide 12a and a further first link pin 12 in the second link guide 12b and a second link pin 17 in the second link guide 17a and a further second link pin 17 is in the second link guide 17b.

• Die zweiten Stellarme 7 können sich um die Lagerbolzen 13 drehen, die ersten Stellarme 10 können sich um den Zentrierbolzen 11 drehen. Die ersten Kulissenbolzen 12 und die zweiten Kulissenbolzen 17 dienen zur Führung der ersten Stellarme 10 bzw. der zweiten Stellarme 7 in dem Kulissenelement 8 bzw. den ersten Kulissenführungen 12a, 12b und den zweiten Kulissenführungen 17a, 17b.

The structure described above results in the following kinematic conditions:

• The second adjusting arms 7 can rotate around the bearing bolts 13 , the first adjusting arms 10 can rotate around the centering bolt 11 . The first link bolts 12 and the second link bolts 17 serve to guide the first actuating arms 10 and the second actuating arms 7 in the link element 8 and the first link guides 12a, 12b and the second link guides 17a, 17b.

The three centering bolts 11 are used to mount the link element 8. They guide the link element 8 and, together with the circular contour of the guide cutouts 11a, specify a rotational movement of the link element 8 about the centering axis 15.

The link element 8 is adjusted via the actuating element 2. This actuating element 2 can be a hydraulic or pneumatic cylinder, for example, which is articulated on the one hand via a bearing pin 19a on the bearing web 19 of the housing and on the other hand via a bearing pin 20a on a bearing point 20 of the link element 8.

The actuating element 2 can also have an electric linear drive; it can also be designed manually as a lever on the link element 8 .

By actuating the actuating element 2, the link element 8 is pivoted along its guide cutouts 11a to a limited extent on a circular path about the centering axis 15, which leads to a forced movement of the actuating arms 10 and 7. This movement is in the 14 ff. shown. Here is in the 14 until 16 the movement of the link element 8 is shown.

In 14 is the link element 8 relative to the housing 9 in a central position, the centering pin 11 are located approximately in the middle of the respective guide cutout 11a.

15 shows the open position. The link element 8 is opposite 14 turned clockwise until the centering bolts 11 rest against the right-hand end of the respective guide cutout 11a. As a result, the actuating arms 10 and 7 pivot outwards to the maximum, all four guide rollers 6 are located on a common circular arc around the centering axis 15 with the largest possible radius.

16 shows the maximum closed position, the slide element 8 is rotated maximum counterclockwise. The centering bolts 11 each rest on the left-hand end of the guide cutouts 11a. In this position, the actuating arms 10 and 7 are pivoted inwards to the maximum extent; they are located on a common circular arc around the centering axis 15 with a minimum radius.

the 17 and 18 illustrate the forced movement of the actuating arms 10 and 7 depending on the position of the link element 8. 17 shows the closed position, the actuating arms 10 and 7 are pivoted inward as far as possible. When the link element 8 moves into the closed position through the corresponding rotary movement, the first link bolts 12 and the second link bolts 17 run along the associated link contour (first link guides 12a, 12b and second link guides 17a, 17b). Thus, the first actuating arms 10 and the second actuating arms 7 move in such a way that they rotate about the centering bolts 11 or bearing bolts 13 and always remain guided in the direction of the center and are located on a common circular arc around the centering axis 15 in every position.

18 shows the maximum open position. Due to the link guides described above, the first support arms 10 and the second support arms 7 move outwards into the open position, but are each on a common circular arc.

19 shows the closed position of the device 1 again in a slightly modified representation, 20 the open position.

In 21 and 22 the recording or release of the component 4 to be centered is shown. In 21 If the component 4 is located with its rotationally symmetrical area within the device 1, all four guide rollers 6 rest on the circumference of the component 4 and are located on a common circular arc around the centering axis 15, so that the component 4 is automatically centered on the centering axis 15.

If the device 1 is opened, the component 4 can enter the device 1 radially or laterally be guided or removed from this, since the clear distance between the two outer guide rollers 6, which are arranged on the second actuating arms 7, is greater than the diameter of the rotationally symmetrical region of the component in the maximum open position.

Reference List

1

contraption

2

actuator

3

clamping mechanism

4

component

5

other component

6

guide rollers

7

second actuator arms

8th

scenery element

9

plate-shaped housing

10

first actuator arms

11

centering bolt

11a

guide cutouts

12

first link bolt

12a

first scenery tour

12b

first scenery tour

13

bearing pin

14

semi-circular recess

15

center axis

16

semi-circular recess

17

second link bolt

17a

second link guide

17b

second link guide

18

frame

19

bearing bar

19a

bearing journal

20

storage place

20a

bearing journal

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 7131829 U [0002]
• DE 851710 B [0002]
• DE 931023 B [0002]

Claims (5)

Device for centering a component (4), which has at least one rotationally symmetrical area, opposite a centering axis (15) with a centering device which is arranged symmetrically to the centering axis (15) and partially encloses the rotationally symmetrical area of the component (4), the centering device having a plurality of an iris diaphragm mechanism, has actuating arms (10,7) which are positively coupled to one another and can be adjusted jointly via a single actuating element (2), each of which carries a guide roller (6) at the free end, with all guide rollers (6) each on a common circular arc around the centering axis (15), wherein a fixed, plate-shaped housing (9) is provided with a recess (14) for receiving the component (4), wherein a link element (8) non-rotatably connected to the actuating element (2) about the centering axis ( 15) is arranged pivotably on the housing (9), the link element ( 8) has guide recesses which cause the adjusting arms (10, 7) to be adjusted when the link element (8) is pivoted relative to the housing (9), characterized in that two first adjusting arms (10) are mounted on the housing at the end remote from the guide rollers (6). (9) are rotatably mounted and each have a first link pin (12), which is guided in a first link guide (12a, 12b) of the link element (8), and that two second adjusting arms (7) on the guide rollers (6) facing away End on the housing (9) are rotatably mounted and each have a second link pin (17), each in a second link guide (17a, 17b) of the link element (8) is guided. device after claim 1 , characterized in that the guide rollers (6) are arranged in a semicircle. device after claim 2 , characterized in that the clear distance between the two outer guide rollers (6) in the maximum opening position is greater than the diameter of the rotationally symmetrical area of the component (4). Device according to one or more of Claims 1 until 3 , characterized in that the plate-shaped housing (9) has a semi-circular recess (14) for receiving the component (4), which adjacent to the recess (14) has several semi-circular shapes arranged on a common circular arc around the centering axis (15), parallel to the centering pin (11) directed towards the centering axis (15), the link element (8) being arranged on the housing (9) with guide cutouts (11a) in the form of arcs of a circle so as to be pivotable about the centering axis (15), the link element (8) having a semicircular recess (16) for receiving the component (4) and is arranged with a respective guide cutout (11a) on a centering bolt (11). device after claim 4 , characterized in that the two first adjusting arms (10) are articulated on a common centering pin (11).

Images