DE19634307C2 - Hydraulic system for forming a tubular tile - Google Patents

Hydraulic system for forming a tubular tile

Info

Publication number
DE19634307C2
DE19634307C2 DE1996134307 DE19634307A DE19634307C2 DE 19634307 C2 DE19634307 C2 DE 19634307C2 DE 1996134307 DE1996134307 DE 1996134307 DE 19634307 A DE19634307 A DE 19634307A DE 19634307 C2 DE19634307 C2 DE 19634307C2
Authority
DE
Germany
Prior art keywords
folding
tools
tube
clamping
pushpoint
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE1996134307
Other languages
German (de)
Other versions
DE19634307A1 (en
Inventor
Rudolf Bueltmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BUELTMANN MONIKA
Original Assignee
BUELTMANN MONIKA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BUELTMANN MONIKA filed Critical BUELTMANN MONIKA
Priority to DE1996134307 priority Critical patent/DE19634307C2/en
Publication of DE19634307A1 publication Critical patent/DE19634307A1/en
Application granted granted Critical
Publication of DE19634307C2 publication Critical patent/DE19634307C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C5/00Pointing; Push-pointing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/02Dies; Selection of material therefor; Cleaning thereof
    • B21C3/06Dies; Selection of material therefor; Cleaning thereof with adjustable section
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C5/00Pointing; Push-pointing
    • B21C5/003Pointing; Push-pointing of hollow material, e.g. tube
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00Details of machines for forging, pressing, or hammering
    • B21J13/02Dies or mountings therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/02Special design or construction
    • B21J7/14Forging machines working with several hammers

Description

The present invention relates to a hydraulic system to form a tubular tile, comprising a Folding press, which is a tube in a long side Can accommodate the working axis, the folding tools releasable on four cross-shaped tool holders are attached and the two side tool holders in opposite directions horizontally and the upper tool holder vertically movable, as well as the associated piston Cylinder units including associated lines from a machine frame are included.

Machines of the type mentioned above are from DE 25 47 948 A1 known and are used on pipes that a drawing machine should go through, a reduced in diameter To form the final cut (drawbar), which at the beginning of the Drawing process can be inserted through the drawing nozzle. The Pipe is placed on the lower tool first and then by the two moving horizontally in opposite directions Side tools squeezed together and finally through the upper folding tool compressed so that there is a folded Cross-section forms to a minimum extent.

Also known (DE-19 49 272 A1) is a device for Taper the end of a workpiece where this is is clamped at the end between two octagonal inserts with semi-cylindrical channels of different diameters for adaptation to different workpiece diameters.

Machines and devices according to the aforementioned state of the In principle, however, technology can only be used for relatively thin-walled pipes be used. Thick-walled pipes cannot be used with it hold more.

DE 36 00 700 A1 describes a machine for pounding Rohrziegeleln (Pushpointen) known. The required drawbar is achieved by hitting a die on the detained tube formed. If you have a bigger one Reduction of the pipe diameter, it can be necessary to hit several times, each time  with somewhat smaller matrices. This machine therefore serves in primarily for the formation of drawing bars on thick-walled Pipes. The disadvantage here is again the fact that thin-walled pipes not produced by this process can be because the tubes are too light when pushing would buckle away.  

So far, this has forced people to Formation of drawing bars on pipes depending on the different machines for each pipe cross-section had to take, with corresponding disadvantages for the Material flow, for the hall layout of the production facility and the investment costs.

The invention is therefore based on the problem that Formation of tube tiles depending on the Pipe cross section different systems can be used must, each separately in the manufacturing operation set up and supplied with pipe material.

This results in the object of the invention, a plant develop with which an industrial company at will each Can produce kind of drawbars.

This object is achieved by the one specified in claim 1 Features resolved. This makes it possible according to the procedures "folds" and "push points" with only one Plant to draw drawbars, reducing the material feed can be maintained, the material flow is not disturbed and machine space is saved.

According to a preferred embodiment of the invention replace the clamping tools located in intermediate brackets at Push points with the vertically arranged Tool holders connected to the folding fishing press Folding tools. This enables despite the described Double function that the folding press is correspondingly small and compact and overall the design effort is low can be held.

An advantageous development of the inventive concept sees before that the pushpoint device via a vertical Swivel axis articulated on the folding press and Can be attached to the folding press using a hook connection is. This enables easy access to the clamping  or folding tools of the folding press or the Tools of the pushpoint device, whereby an alignment of the Working axes of folding press and pushpoint device can be easily restored. Furthermore, it will be like this a secure connection between folding press and Pushpoint device guaranteed.

According to an appropriate embodiment of the invention Clamping tools form-fitting with the intermediate brackets connected. This enables an easy and quick Handling the clamping tools.

It is advantageous if the clamping tools are polygonal in cross-section and along each have semi-cylindrical recesses on their long sides, whose different radii each roughly correspond to the radius of the correspond to the pipe to be clamped. This enables one secure clamping of the pipe without the risk of There is damage to the pipe and an easy adjustment different diameter of the tube.

If according to a preferred embodiment of the invention the folding tools in the same way as the Intermediate brackets of the clamping tools with the Tool holders are connected, the Folding tools quickly and easily through the Replace intermediate brackets with the clamping tools. Consequently is the switch between the procedures "folding" and "Push points" possible quickly.  

In the following the present invention is based on a concrete embodiment with reference to the accompanying drawings explained in more detail.

Show

Figure 1 is a vertical schematic section of the hydraulic system according to the invention for forming a tubular tile.

FIG. 2 shows a schematic diagram of the system according to the invention according to FIG. 1 in plan view;

. FIG. 3 shows the clamping of the pipe wherein the tool holders, not shown in Figure 1 are indicated by vertical zoom driven against the tube clamping tools during Pushpoint- operation of the plant according to the invention according to section line III in Fig. 1;

Fig. 4 is a schematic diagram of the "folding" mode, in which the clamping tools according to FIG. 3 located in intermediate brackets are replaced by folding tools.

First, reference is made to FIG. 1. As already mentioned at the outset, the hydraulic system 1 according to the invention for forming a tubular tile should be able to be used for two operating modes, on the one hand for folding tubular tiles in thin-walled tubes and on the other hand for pushing tubular tiles (push points) in thick-walled tubes, so that the advantages mentioned above can be achieved. The Fig. 1 shows the system 1 according to the invention in a principle section, namely in the push point operation. A pipe 2 to be provided with a drawbar for the drawing process is fed to the hydraulic system 1 via the front opening 103 , which represents the material feed side. The tube 2 is first placed on a lower clamping tool 101 b, which is received by the machine frame of a folding press 10 known per se. For later pushpoints, the tube 2 must be firmly clamped in, so that it cannot be moved in the longitudinal direction when pushing. For this purpose, another clamping tool 101 a is fed vertically from above. The clamping force in the radial direction of the tube 2 must be much higher than the push point force in the longitudinal direction of the tube 2 , preferably six times as high. The clamping tools 101 a, 101 b, which replace the folding tools normally used for folding when pushing, are kept comparatively long in order to ensure the lowest possible surface pressure of the tube 2 and thus to avoid damage to the tube 2 . Correspondingly necessary hydraulic elements for the radial infeed of the tools or tool holders, such as cylinders, pistons, lines, are not detailed in the schematic diagram. Here again, reference is made to DE 36 00 700 A1. A more detailed description of the tool holders and tools will be given in Fig. 3. As indicated by the double arrow above the clamping tool 101 a, the clamping of the tube 2 is effected by the vertical delivery of the upper clamp tool 101 a, whereby the tube 2 is fixed in a working axis 21 of the Faltangelpresse 10th In order to be able to push points, however, the tube 2 must be pushed beyond the rear opening 104 of the folding press 10 before clamping. The tube 2 thus reaches the working area of a pushpoint device 20 . The pushpoint device 20 has radially adjustable radial guides 201 in the area of the rear opening 104 of the folding press 10 , which is clear from the double arrows of the radial guides shown in principle. These radial guides 201 primarily serve to prevent lateral deflection of the tube 2 when pushing. As stated, the actual clamping is carried out by the clamping tools 101 a, 101 b. Furthermore, it can be seen that the tube 2 protrudes to the right over the radial guides 201 so that the free tube end can be tapered by means of suitable pushpoint matrices 204 , 205 . From Fig. 1 it is seen that the Pushpoint- matrices 204 are received by an elongated die holder 203,205. The die holder 203 is in turn received by a push pointer 202 , which is connected to the pushpoint device 20 so as to be displaceable in the axial direction of the tube 2 . The push pointer 202 can, for example, as shown in principle in FIG. 1, be accommodated in an axially displaceable manner in a cylindrical pressure chamber 207 , the axial displacement to the left in the direction of the free tube end to be tapered being possible by applying an oil pressure p to the cylindrical pressure chamber 207 . Correspondingly necessary seals and further structural details of the pushpoint device 20 are not shown, since the push point is known per se.

Fig. 1 shows the hydraulic system 1 of the invention for forming a tube drawing point for a Pushpoint- operation, after which the free end of the tube 2 a according to the selected push-Point die is tapered and can already represent the tube drawing point. If several pushpoint work steps are necessary, it can be very easy to work if there are several pushpoint matrices that can be changed quickly and easily. In FIG. 1, this is made possible in principle by the die holder 203 , which in this case receives the pushpoint dies 204 and 205 , which have a different opening cross section. To activate the pushpoint dies 204 and 205 required in each case, a reciprocating piston 206 is provided, which can adjust the pushpoint dies in the die holder 203 radially to the tube 2 . The number of pushpoint matrices is of course not only limited to two, but can also contain more pushpoint matrices, depending on the number of operations required to achieve the desired pipe cross-section.

In FIG. 2, which shows the hydraulic system 1 according to the invention from above, it can also be seen that the pushpoint device 20 is pivotably articulated on the folding press 10 by means of a pivot axis 208 . From Figs. 1 and 2 is further seen that aligned with each other at the push point operation the working axis 21 of the Faltangelpresse 10 and the Arbeitaschse 22 of the push point device 20. This is important because otherwise clamping by the clamping tools 101 a, 101 b and simultaneous pushing of the push pointer 202 onto the tube 2 is not possible. Due to the pivot axis 208 shown in principle , the pushpoint device 20 can , as shown by the double arrow, be swiveled very quickly and easily to the side in a horizontal plane without the working axis 22 of the pushpoint device 20 thereby changing. Assuming an appropriately dimensioned and precisely manufactured pivot axis, it can be assumed that after pivoting back of the pushpoint device 20 an alignment of said working axes 21 , 22 is still guaranteed. A lateral pivoting of the pushpoint device 20 may be necessary, for example, if the operating mode of the pipe tile system according to the invention is to be changed from the "pushpoints" operating mode to the "folding" operating mode or vice versa, or if a pipe 2 with a different cross section is to be processed got to. For this purpose, it is necessary to replace the corresponding tools (for example, to replace the folding tools 107 a, 107 b with clamping tools located in intermediate holders 106 a, 106 b and vice versa) in the tool holders 100 a, 100 b provided for this purpose, as is also shown in FIGS. 3 and 4 is explained. After the pushpoint device 20 has been swiveled away to the side, quick and easy access to the tools to be replaced is thus possible via the rear opening 104 of the folding press 10 .

As is further shown in FIG. 2, the pushpoint device 20 must be held firmly and securely on the folding press 10 in the operating position, ie when the working axes 21 , 22 are aligned. This can, for example, by means of a suitably dimensioned hook connection 105 be made 109, wherein a rotatably engages in a vertical plane with the machine body of the Faltangelpresse 10 associated hook 105 via a correspondingly diemensioniertes fixedly connected to the housing of the push point device 20 abutment 209th

FIG. 3 now shows a more detailed representation of the captured from the machine frame of the Faltangelpresse 10 clamping tools 101 a, 101 b. In the "folding" operating mode, horizontally adjustable side tools 102 a, 102 b are also required, which are also shown in FIG. 3. However, these are not required for the pushpoint operation shown in FIG. 3, in which the tube 2 is only clamped by the folding press 10 , and are therefore in the rest position. In Fig. 3 it is clear that the clamping tools 101 a, 101 b are releasably connected to corresponding intermediate brackets 106 a, 106 b.

As can also be seen in FIG. 3, the intermediate brackets 106 a, 106 b have a T-shape in cross section and engage positively in correspondingly shaped T-slots 1000 a, 1000 b of the tool holders 100 a, 100 b. On their side facing the tube 2 , the intermediate brackets 106 a, 106 b have recesses 1060 a, 1060 b that are approximately square in cross section. As can be seen, these recesses 1060 a, 1060 b are open towards the tube 2 and have chamfers 1061 a, 1061 b in their area of the corners. As can also be seen, the recesses 1060 a, 1060 b of the intermediate brackets 106 a, 106 b accommodate the clamping tools 101 a, 101 b already mentioned. The clamping tools 101 a, 101 b have an approximately square shape in cross-section and are designed as elongated blocks. The edges thereof are designed in the same way as the chamfers 1061 a, 1061 b, which facilitates moving the clamping tools 101 a, 101 b in and out. Each clamping tool 101 a, 101 b has semi-cylindrical recesses 1010 a, 1010 b to 1013 a, 1013 b on all four sides along its longitudinal axis. The semi-cylindrical recesses 1010 a to 1013 a or 1010 b to 1013 b each of a clamping tool have different radii. So it is possible that pipes with different diameters can be clamped. For this purpose, the clamping tools 101 a, 101 b simply need to be pulled out of the intermediate brackets 106 a, 106 b and after a 90 ° rotation about their longitudinal axis they have to be pushed back into the intermediate brackets 106 a, 106 b. The semi-cylindrical recesses of the clamping tools (in this case 1013 a, 1013 b) facing the pipe 2 each have the same radius, which corresponds approximately to the radius of the pipe 2 to be clamped. It is thus possible to quickly adapt the clamping tools 101 a, 101 b to different pipe dimensions.

In Fig. 3 it is also clear that the horizontally oppositely movable side tools 102 a, 102 b are similar to the intermediate brackets 106 a, 106 b of the clamping tools 101 a, 101 b connected via T-guide grooves with side tool holders 100 c, 100 d . However, these side tools 102 a, 102 b are not required for the operating mode pushpoints, as already mentioned, but remain in the rest position.

As is to be illustrated in FIG. 4, when folding thin-walled tubes they serve to first squeeze the tube 2 lying on a lower folding tool 107 b in the horizontal direction, a folding tool 107 a brought up from above folding the tube cross section shortly thereafter.

In the "folding" operating mode, the pushpoint device 20 is in the rest position. Since it is not used, it can be swiveled away, for example, to carry out preparatory work on its tools (matrices). As in FIG. 3, of course, additionally required hydraulic elements, such as cylinders and pistons, via which the tool holders 100 a to 100 d are moved, are not shown for the sake of clarity.

As already mentioned, frequent changing of the tools in the folding press 10 may be necessary, for example to switch between the “folding” and “push point” operating modes or to adapt the tools to different pipe diameters. This should be done relatively easily and quickly in order to keep set-up times in production as short as possible. The positive engagement shown in FIG. 3 between the clamping tools 101 a, 101 b and the intermediate holders 106 a, 106 b and of course also the pivotability of the pushpoint device 20 connected to the folding fishing press 10 already contributes to this.

Furthermore, a switch from the "folding" operating mode to the "pushing point" operating mode can be carried out easily by pulling the folding tools 107 a, 107 b out of the tool holders 100 a, 100 b and the intermediate holders 106 a, 106 b together with them Clamping tools 101 a, 101 b are instead pushed back into the tool holders 100 a, 100 b.

As the double arrow in FIG. 3 clearly shows, only the upper clamping tool 101 a is vertically brought up to the pipe 2 for clamping a pipe 2 resting on the lower clamping tool 101 b. The tube 2 is not shown in FIG. 3.

Claims (6)

1.Hydraulic system for forming a tube tile, comprising a folding press, which can hold a tube on the long side in a working axis, the folding tools of which are detachably mounted on four cross-shaped tool holders and the two side tool holders can be moved in opposite directions horizontally and the upper tool holder can be moved vertically, as well as the assigned piston-cylinder units together with the associated lines are received by a machine frame, characterized in that a pushpoint device ( 20 ) is arranged in the material feed direction behind the folding press ( 10 ), which pushes the tube ( 2 ) in a direction relative to the working axis ( 21 ). the folding press ( 10 ) can accommodate the aligned working axis ( 22 ), and the tube ( 2 ) is clamped by clamping tools ( 101 a, 101 b) located in the folding press ( 10 ).
2. System according to claim 1, characterized in that the clamping tools ( 101 a; 101 b) located in intermediate brackets ( 106 a; 106 b) during push punching with the vertically arranged tool brackets ( 100 a; 100 b) of the folding press ( 10 ) replace connected folding tools ( 107 a; 107 b).
3. Installation according to claim 1 or 2, characterized in that the pushpoint device ( 20 ) is pivotably connected to the folding press ( 10 ) via a vertical pivot axis ( 208 ) and via a hook connection ( 105 , 209 ) to the folding press ( 10 ) can be determined.
4. Plant according to claim 2 or 3, characterized in that the clamping tools ( 101 a; 101 b) are positively connected to the intermediate brackets ( 106 a; 106 b).
5. Plant according to one of claims 1 to 4, characterized in that the clamping tools ( 101 a; 101 b) are polygonal in cross section and each have along their long sides semi-cylindrical recesses ( 1010 a to 1013 a and 1010 b to 1013 b) whose different radii each correspond approximately to the radius of the pipe ( 2 ) to be clamped.
6. Plant according to one of claims 1 to 5, characterized in that the folding tools ( 107 a; 107 b) in the same way as the intermediate brackets ( 106 a; 106 b) of the clamping tools ( 101 a; 101 b) with a positive fit Tool holders ( 100 a; 100 b) are connected.
DE1996134307 1996-08-24 1996-08-24 Hydraulic system for forming a tubular tile Expired - Fee Related DE19634307C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1996134307 DE19634307C2 (en) 1996-08-24 1996-08-24 Hydraulic system for forming a tubular tile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1996134307 DE19634307C2 (en) 1996-08-24 1996-08-24 Hydraulic system for forming a tubular tile

Publications (2)

Publication Number Publication Date
DE19634307A1 DE19634307A1 (en) 1998-02-26
DE19634307C2 true DE19634307C2 (en) 1998-09-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE1996134307 Expired - Fee Related DE19634307C2 (en) 1996-08-24 1996-08-24 Hydraulic system for forming a tubular tile

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DE (1) DE19634307C2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1949272A1 (en) * 1968-10-03 1970-06-04 George A Mitchell Company A method of tapering the end of a Werkstueckes and apparatus for carrying out the method
DE2547948A1 (en) * 1975-10-27 1977-05-05 Rudolf Bueltmann Hydraulic press formed start for tube drawing - has body with bores for pistons with moving and fixed dies
DE3600700A1 (en) * 1986-01-13 1987-07-23 Rudolf Bueltmann Machine for pushing tube-drawing points (pushpointer)

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1949272A1 (en) * 1968-10-03 1970-06-04 George A Mitchell Company A method of tapering the end of a Werkstueckes and apparatus for carrying out the method
DE2547948A1 (en) * 1975-10-27 1977-05-05 Rudolf Bueltmann Hydraulic press formed start for tube drawing - has body with bores for pistons with moving and fixed dies
DE3600700A1 (en) * 1986-01-13 1987-07-23 Rudolf Bueltmann Machine for pushing tube-drawing points (pushpointer)

Also Published As

Publication number Publication date
DE19634307A1 (en) 1998-02-26

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