DE3023043A1 - DEVICE FOR PRODUCING MULTIPLE HOLES PIPE BRACKETS - Google Patents

Description

Benteler-Werke AG Ro - 2011

Neuhaus plant
Residenzstrasse 1

4790 Paderborn

Device for the production of multi-perforated tubular brackets

The present invention relates to a device for producing multi-perforated tubular brackets, especially for bending and multiple perforation of tubular furniture frame parts.

In the case of seating and lounging furniture, especially from the leisure sector, it is necessary due to the area of application, to keep the structural elements light in weight. In addition, there is the constant demand to find solutions so that the furniture can be folded and moved in the event of a change of location can be stored in a space-saving manner.

As a result, it has become established to manufacture the frame parts of such furniture from steel or metal tubing. Last but not least, the introduction of series production results in a cost-effective production method, which means a wide range Distribution of such seating and reclining furniture was made possible in particular for the leisure sector.

130062/0108

Usually, individual work or machining operations carried out on special machines. The previous production units are mostly single-purpose machines whose operation the pure machine times are less than the required in each case Opening times.

Individual automatically operating machines and devices are known in which individual machining operations run in a chain in one machine. In a special, well-known machine, the straight pipe section is bent first and then the pipe bend is attached perforate the various places. This machine unit is used to manufacture specific tubular brackets well suited; however, the hole pattern cannot be changed at all or only with disproportionate effort will.

The object of the present invention is therefore to provide a device for producing multiple perforations To make tube brackets so that this device takes up all the necessary operations without taking up a lot of space can perform the requirement of time-consuming transport operations, the adjustability of the tools is desirable.

The solution to this problem is achieved by a device of the generic type which is characterized is positioned in that the ends of retractable mandrels are positioned on individual, intermittently fed straight pipe sections and individual or groups of perforated units and perforated units positioned in a preselectable hole position to the pipe sections Are arranged acting and vertically offset two or more bending devices horizontally or inclined to act on the fed from the punching station, perforated pipe section are provided, as well as arrangements assigned, the perforated pipe section and / or the

$ 130062/010

bent tubular frame to be handed over in a timed manner.

A device designed in this way is capable of picking up the separated, intermittently supplied straight pipe sections to perform both the bending operation and all punching operations.

Contrary to the opinion prevailing so far among experts, it is now proposed that the pipe section first to provide all the necessary perforations and perforations and then insert the perforated, straight pipe section to bend the same machine unit. Although the required number of holes and their type are specified by the article is, there is a considerable saving in the total machining time with suitable hole placement. The use of such a machine is not limited to the production of tubular brackets, but it is particularly suitable for the production of multi-perforated tubular brackets.

The device for manufacturing such tubular furniture frame parts is of great importance for manufacturing companies the seating and reclining furniture industry in the leisure furniture sector.

The conception of the proposed device meets market requirements in such a way that the hole pattern can be preselected and can be changed without considerable effort after certain series have been run through. The on A main contact rail to be positioned punching units can be moved with the contact surface and are the corresponding hole pattern on the main system rail mechanically locked.

130062 (0106

In the further embodiment it is proposed that through-hole units acting approximately horizontally in the end region with the mandrels which can be pushed into the pipe section at the end are mounted so as to be displaceable and the Mandrels transversely penetrating through-hole punches are provided for forming pipe holes on both sides, the Shanks of the perforated punches located in the perforation division serve as a pipe fixation for the approximately vertical Action of the punch.

It is also included in the inventive device that two or more thrust piston units such are arranged acting on the linkage of a transfer device, so that the transfer path for the perforated pipe section due to a short diagonal offset, height offset from the punching to the bending station and the direction of insertion into the open Profiles of the bending elements offset in the corresponding direction of rotation of the bending device is sketched out.

Finally, it is considered of particular importance in connection with the inventive device, that the shaft axis of the bending segments are arranged diverging from the vertical up to 45 ° to the rear. This makes it possible that with the bending runners pivoted freely and after loosening the clamping jaws, the fully perforated and bent tubular brackets scan the bending program by spring-actuated ejectors as a function of tactile signals Ejected measuring pins and fed to one or more stirrup discharge rails located in the catching position.

130062/0106

Further features and advantages of the invention are the subject of the subclaims and result from the following Description of an embodiment shown in the drawings.

Show it:

Figure 1: Front view of a device according to the invention, Figure 2: Section along the line II-II of FIG. 1 in the Position: pipe section perforated, all punch retracted, transfer device in gripping position.

Figure 3: Detail from the section along the line III-III of Fig. 1, but the piercing punch still in the piercing position.

Figure 4: Section along the line IV-IV of Fig. 1, punch still in the hole position.

Figure 5: Section along the line V-V of Fig. 1, tube bracket finished bent, bending runner still attached

FIG. 6: Section along the line VI-VI of FIG. 1, at the time when the bracket is bent and released, however has not yet been launched.

Figure 1 shows the front view of the device.

The front frame feet 1u.1 'of the machine frame, which are inclined slightly backwards, carry the horizontally firmly connected main support rail 2 in the middle area 3 are arranged with their contact surfaces 4 on the main contact rail 2. The punching units act with their punching punches 5, 5 ", 5 ¹¹ .... vertically on the inserted pipe section 6, which is in holding jaws 7, 7", T ',

is held during the punching process.

In the two end regions of the main support rail 2, the two carriages can be displaced in the longitudinal position via sockets

8 and 8 'slidably provided, both of which in the pipe ends

9 and 9 'hold insertable mandrels 10 and 10' and on the other hand

130062/0106

with the thorns laterally equally displaceable, approximately horizontally acting through-hole units 11 and 11 '. The perforation punches 12 and 12 ^{1 of} these perforation units perforate the front and rear pipe walls centrally acting on the pipe section 6. The mandrel 10, which is inserted in the tube, with its transverse bore 13 serves as a guide for the piercing punch. This can be seen in detail from FIG. 3.

The two through-hole punches 12u which perforate the pipe section in the end regions. 12 'remain in their end position and fix the pipe section with their shafts during the action of the approximately 90 ° offset, ie approximately vertically perforating punch 5, 5 ¹ , 5 ¹ ', .... During this multiple perforation, the pipe section 6 is in the adapted to the pipe diameter

Holding jaws 7, 7 ¹ , 7 ′ ¹ , as shown in FIG. 4

can be seen. After the group of punching punches 5 and the two punching punches 12 have moved back, the finished-punched pipe section is removed from the gripper 15 of the transfer device recorded. This is shown in FIG. 2 for clarification.

From Fig. 2 it can also be seen that at the time of readiness to receive the perforated straight pipe section 6 'the bending segments 19 of the bending device 17 are in a Rotary position are in which a profile 20 is facing the pipe section only with the upper profile shoulder. The lower one The shoulder of the profile is cleared to enable the pipe section to be inserted. The bending runners 21 are pivoted away .

In the course of processing, the clamping jaws 22 act in the central area and lock the perforated pipe section 6 'so that the Gripper 15 can move back. After the gripper 15 has moved back is, the bending runners 21 can retract in the direction of the segment center and encompass together with the worked out Profile of the bending segment 19 the respective

$ 130062/010

Leg of the pipe section 6 '. It is easy to understand that before the start of the bending operation, the bending segments 19 have rotated in such a way that the pipe section 6 'to be bent has a fully developed profile with profile shoulders on both sides is presented.

In Fig. 5 is a section along the line V-V of Fig. 1 is shown. The situation is shown after the Both pipe legs of the pipe section are bent to the pipe bracket 23 and the bending runners 21 are still in contact. The bending runners 21 then lift off from the tubular bracket 23. Before and during the bending operation, the pipe section 6 'in the middle holding clamping jaws 22 now release the clamping and ejectors 25, which mostly act by means of spring pressure, now push the finished bent tubular bracket 23 away obliquely downward, so that the tubular bracket is then taken over by the stirrup discharge rail 24 and fed to a magazine.

This situation can be seen from the detail according to section VI-VI in FIG. 1.

Finally, it must be added that the actuation of the ejector 25 is synchronized in terms of timing with the actuation of the Isolation bolts 26. By actuating these isolation bolts, the device becomes isolated, straight pipe sections intermittently fed.

130062/0106

Reference list of symbols Our file number: Ro - 2011

1. Stand base (1 and ^{1 1} )

2. Main support rail

3rd punch unit (3, 3 ', 3 ", 3 ¹¹¹ )

4. Contact surface for 3

5. Hole punch (5, 5 ¹ , 5 ", 5 ·")

6. pipe section

6 ¹ piece of pipe, perforated

7. Holding jaws (7, 7 ¹ , 7 ¹¹ , 7 '"......)

8. Slide (8 and 8 ¹ )

9. Pipe ends of 6 (9, 9 ')

10. thorn (10 and 10 ¹ )

11. Hole unit (11 _and 11 ')

12. Hole punch (12 and 12 ¹ )

13. Cross hole of 10

14. Transfer device

15. Grapple

16. Push piston unit for

17. Bending device

18th wave of 17th

19. Bending segment

20. Profile from 19

21. Bending runner

22. Jaw

23. Tube bracket

24. Bow discharge rail

25. Ejector

26. Isolation bolt

130062/0106

Claims (15)

Benteler-Werke AG Ro-2011 Neuhaus plant
Residenzstrasse 1
4790 Paderborn Claims M.! Device for the production of multi-perforated tubular brackets, in particular for the bending and multiple perforation of tubular furniture frame parts, characterized in that mandrels (10) which can be retracted at the ends are positioned for individual, cyclically fed straight tubular pieces (6) and individual or groups in a preselectable hole position perforation units (3) and perforation units (11) positioned on the pipe sections (6) are arranged to act and two or more bending devices (17) offset in height are provided horizontally or inclined to act on the perforated pipe section (6 ¹ ) fed from the perforation station, as well as arrangements are assigned to hand over the perforated pipe section (6 ¹ ) and / or the bent pipe bracket (23) in a timed manner. 2. Apparatus according to claim 1, characterized in that in the preselectable hole position Punch units to be positioned (3, 3 ', 3' '....) are displaceable on one or more contact rails (2) with the contact surface (4) and correspond to the respective hole pattern are mechanically locked on the support rail (2). 130062/0106 3. Apparatus according to claim 1 or 2, characterized in that the surface of the main contact rail (2) is parallel to the pipe section axis, the hole direction of the punch group (5) is provided up to 20 ° _from the vertical and the shaft (18) of the Bending device (17) is arranged inclined backwards up to 45 ° from the vertical. 4. Apparatus according to claim 3, characterized in that in the end region acting approximately horizontally through-hole units (11) with the mandrels which can be inserted at the end (10 and 10 ') are mounted equally displaceably and the mandrels (10 and 10 ¹ ) penetrate through-hole punches (12 u. 12 ') are provided for shaping pipe perforations on both sides. 5. Apparatus according to claim 4, characterized characterized in that the approximately vertically acting through-hole punches (12) in the end region of the Pipe section (6) located in perforation pitch shafts of the stamp are provided as a pipe fixation. 6. Device according to claim 1 or one of the following, characterized in that by a hydraulic unit both for several on the Main support rail (2) slidable punching units (3) locked in function and also for individual ones in others Position locked through-hole units (12) pressure fluid with different fluid pressure can be removed. 130062/0106 7. Device according to claim 1 or one of the following, characterized in that groups of punches (5) for simultaneous but Time-shifted punching with respect to individual or groups of through-hole punches (12) are arranged in a controllable manner. 8. The device according to claim 1 or one of the following, characterized in that a transfer device (14) acts on the perforated pipe section (6 ¹ ) so that the pipe section in the intended direction of rotation to the acting bending segments (19) in the vertically offset bending station becomes transferable. 9. Device according to claim 1 or one of the following, characterized in that that 2 or more thrust piston units (16) in such a way the linkage of the transfer device (14) are arranged to act so that the transfer path is short Oblique offset, height offset and direction of insertion in the rotated bending segments presenting the open profiles (20) (19) of the bending device (17) is drawn. 10. The device according to claim 9, characterized in that in the transfer device at least one gripper (15) is equipped with a pin which ^{holds the position of the pipe section (6 1} ) fixed during the transfer process until the jaws (22) of the bending station Have captured pipe section (6 ¹ ). 130062/0106 1 1. Device according to claim 1 or one of the following, characterized in that on the located in the bending position, perforated pipe section (6 ') approximately centrally clamping jaws (22) are provided and acting on the bending segments (19, 19') with the inset Pipe section (6 ¹ ), bending runners (21, 21 ') are arranged so as to capture the pipe section (6') for pipe bending. 12. The device according to claim 11, characterized characterized in that the shaft axis (18) of the bending segments (19) deviates from the vertical by up to 45 ° are arranged. 13. The device according to claim 1 or one of the following, characterized in that spring-operated ejectors (25) act on the molded Tube brackets (23) are provided as a function of tactile signals, the bending program scanning measuring pins and one or more stirrup discharge rails (24) arranged in the catching position become effective. 14. Apparatus according to claim 13, characterized in that the straight pipe section (6) from the infeed rail into the punching station Separation bolts (26) are arranged in a clocked manner with the ejectors (25). 15. A method for the production of bent and perforated pipe sections, in particular for the bending and perforation of furniture pipe frame parts, characterized in that individual, intermittently fed straight pipe pieces (6) pierced with thorns (10) retracted at the ends in the two end regions of through-hole punches (12) and the shafts of the piercing punches (12) have a fixing effect, while vertically a group of punches (3) located in a preselectable hole position act on the pipe section (6) and, after the punch return, a transfer device (14) removes the pipe section (6 ") the one in the receiving position Bending segments (19) feeds, whereupon the bending runners (21) encompass the legs of the pipe section (6 ¹ ) and form brackets together with the bending segments (19), whereupon, after releasing the pipe bracket (23) and releasing the clamping jaws (22), spring-actuated ejectors (25) feed the tubular bracket (23) to the bracket removal rail (24).