WO2004016415A1

WO2004016415A1 - Parallel pressure module

Info

Publication number: WO2004016415A1
Application number: PCT/DE2003/002474
Authority: WO
Inventors: Bernhard Hengstebeck
Original assignee: Hengstebeck Gmbh & Co. Kg
Priority date: 2002-07-23
Filing date: 2003-07-23
Publication date: 2004-02-26
Also published as: DE10233254A1; DE10233254B4; EP1523406A1

Abstract

The invention relates to a parallel pressure module (1) for transmitting parallel pressures for actuating a guided ram pressure plate (2) on a press. Said module consists of at least four massive, single-element, articulated parts (5, 6, 7, 8; 105, 108) which are arranged opposite each other in pairs, and a pressure link (11; 111) which is guided in a linear manner between two opposing bearing receiving elements (9, 10). Said articulated parts (5, 6, 7, 8; 105, 108) can be easily interconnected in a plug-in manner by means of upper and lower bearing segments (12, 13; 112, 113) which are arranged in a fixed manner in the bearing receiving elements (9, 10), and middle bearing segments (14, 114) which are arranged in the pressure link (11; 111). Said middle bearing segments (14; 114) are guided perpendicularly to the direction of displacement of the driven pressure link (11; 111) in a linearly displaceable manner.

Description

Parallel Print Engine

The invention relates to a parallel pressure module for transmitting parallel pressures for actuating a guided ram pressure plate of a press or for clamping workpieces.

Such pressure modules are generally used in machine, device and press construction for the transfer of parallel pressures. One of the best known parallel pressure modules is the toggle lever, for example a toggle press.

Here, the principle of action "length by extension" is realized from an articulated connection of the toggle levers by means of a shaft and a bore with, for example, a bearing mount and a connecting rod. Such articulated connections in parallel pressure modules have become known in connection with toggle lever arrangements, for example, from DE 100 65 255 A1. Such an articulated connection by means of a shaft and a bore, the bores often being additionally provided with bearing bushes, represents an essential weak point in the transmission of high compressive forces.

Furthermore, such toggle joint connections require on the one hand a large installation space, on the other hand their assembly or disassembly is often very problematic, since the installation space is difficult to access, depending on the system design.

From GB 502 872 a basically different parallel pressure module for the transmission of parallel pressures is known, which consists of at least two pairs of solid joint pieces with cylindrical ends, which are mounted in cylindrical bearing segments. The object of the invention is to create a parallel pressure module without the disadvantages mentioned at the outset, which nevertheless transmits high compressive forces with simple construction costs and a small space requirement.

This object is achieved according to the invention for a first embodiment by the features mentioned in the characterizing part of claim 1. By means of a linear displacement process of the pressure rocker, the joint pieces are brought in pairs from their basic position including an angle into the extended position required for a pressing process. Along with this, due to the upward and downward movement of the pressure rocker moving vertically to the direction of movement of the pressure rocker in its downward stroke, a parallel stroke-downward movement of the tappet pressure plate connected to a bearing receptacle is applied to the application of the pressing force. The parallelism of the stroke movement is also given when the ram pressure plate is subjected to an eccentric load.

Due to the solid, one-piece design of the joint pieces in connection with the stable bearing segments, a high pressure ratio is achieved centrally over the entire support width of the ram pressure plate.

An advantageous embodiment of the invention provides that individual parallel pressure modules are arranged next to one another in any number with the interposition of coupling pieces, only one drive having to be provided for their actuation. This makes it possible, for example, to populate a large-area tappet plate with several parallel pressure modules and thus to apply a correspondingly high, parallel pressing force.

Another embodiment according to the invention of a parallel pressure module for transmitting parallel pressures for all-round central clamping of workpieces, for example a square tube, wherein the pressure rockers can also be designed to act radially and the bearing segments which are guided in a linearly displaceable manner in the inner bearing receptacles evenly towards the central center and can move back, has the features contained in independent claim 2. One embodiment of the invention provides that the pressure rockers are driven hydraulically / pneumatically by means of a piston / cylinder unit or by means of a controllable motor / gear unit.

Advantageously, the joint pieces and the bearing segments are connected to one another in a pluggable manner, the joint pieces being guided in them by means of side boundaries formed in each case on the bearing segments, in particular in the stretched operative position of the joint connection.

In order to ensure a smooth function of the respective joint connections in a simple manner, they are preferably connected to a central lubrication system.

Adjustable stops are provided according to the invention to limit the stroke of the pressure rockers. Alternatively, the stroke limitation can also be controlled by means of cams.

Further details and advantages of the invention result from the claims and the following description of exemplary embodiments shown schematically in the figures. Show it:

Fig. 1 in a partial longitudinal section arranged in a press frame

Parallel pressure module, connected to a guided ram pressure plate, shown in an extended position;

FIG. 2 shows the parallel printing module in the basic position on the left compared to FIG. 1;

3 shows the parallel printing module in the basic position on the right-hand side compared to FIG. 1; Fig. 4 in a partial longitudinal section two adjacent, by one

Coupling piece connected parallel pressure modules, shown in the left-hand basic position;

Fig. 5 shows in detail an arrangement of parallel printing modules for

Clamping a workpiece;

6a shows the parallel printing module as a detail of FIG. 2;

6b as a detail the pressure rocker of the parallel pressure module according to FIG.

6a, seen from above;

7a as a detail a further embodiment of a parallel

Print module, shown in the left-hand basic position; and

7b as a detail the pressure rocker of the parallel pressure module according to FIG.

7a, seen from above.

1 shows a parallel pressure module 1 for transmitting pressures for actuating a ram pressure plate 2 of a pressing device, the ram pressure plate 2 being guided in columns 4 arranged on the press frame 3.

The parallel pressure module 1 consists of four solid, one-piece articulated pieces 5, 6, 7, 8, which lie opposite each other in pairs, and a pressure rocker 11, which is linearly guided between two opposing bearing receptacles 9, 10 in the bearing receptacle 9 fixedly arranged bearing segments 12 and the articulated pieces 7, 8 with bearing segments 13 fixedly arranged in the bearing receptacle 10 and on the other hand at their inner ends with central bearing segments 14 arranged in the pressure rocker 11 in a simple manner, the bearing segments 14 being vertical are guided linearly displaceable to the direction of movement of the driven rocker arm 11. All bearing segments 12, 14 and joint pieces 5, 6, 7, 8 have the same width for optimum pressure transmission. In the shown stretched state, all joint connections remain inextricably linked.

The bearing receptacle 9 is firmly connected to the press frame 3, while the bearing receptacle 10 is arranged on the ram pressure plate 2 guided over the columns 4.

The parallel printing module 1 is shown in the closed working position. The joint pieces 5, 6, 7, 8 were brought into a stretched position by a linearly guided movement of the pressure rocker 11 - which is driven, for example, by a hydraulic cylinder connected to its joint head 15, so that the plunger pressure plate 2 was accompanied by a parallel stroke movement in the direction 16 has completed the press table 17.

2 shows the parallel printing module 1 in the open, left-hand basic position. It can be clearly seen here that with a linear movement - to the left in the direction of arrow 18 - the pressure rocker 11, the bearing segments 14 are moved parallel - which are preferably moved in guide strips 19 in the case of a rectangular design - upwards. Analogously to the upward stroke of the bearing segments 14, the plunger pressure plate 2 is brought into its upper basic position 20 by a parallel lifting movement, the joint pieces 5, 6, 7, 8 also having assumed their starting position enclosing an angle.

3 shows the parallel printing module 1 in the open right-hand basic position. In order to get from the left-hand basic position shown in FIG. 2 to the right-hand basic position 21 according to FIG. 3, the pressure rocker 11 is linearly moved to the right by reversing the drive, both the bearing segments 14 in the pressure rocker 11 and the plunger pressure plate 2 being parallel Carry out an upward stroke and a parallel downward stroke. A double stroke effect results from the left-hand to the right-hand basic position, with the bearing segments 14 which move in parallel taking over the lifting and lowering. In Fig. 4 two adjacent, structurally identical parallel pressure modules 1 are shown, the pressure arms 11 are connected in series by means of a coupling piece 22, with only one drive for linear movement of the pressure arms 11 lined up - a hydraulic cylinder or the like is included the articulated head 15 of the pressure rocker 11, which is connected on the right in the exemplary embodiment, is required. In this way, it is advantageously achieved that even a large-area tappet pressure plate 23 can be fully equipped with a plurality of parallel pressure modules 1.

Tools positioned off-center can also be mounted between the stationary press table 17 and the movable ram pressure plate 23, since the tools are prevented from jamming due to the parallel stroke movement of the ram pressure plate 23.

Furthermore, it is within the scope of the design options that the base body 24 of the central, i.e. Bearing segments 14 arranged in the pressure rocker 11 - manufactured as a turned part - can have a round cross-section (cf. FIGS. 6a, 6b). 6b that the articulated pieces 5, 6, 7, 8, which are pluggably connected to the bearing segments 14, are guided against them by means of side delimitations 25 formed on the bearing segments 14.

7a and 7b show a partial view of an alternative parallel pressure module 101, each with two articulation points formed in a bearing segment 112, 113, 114 for pluggable connection with two articulated pieces 105, 108. The compact arrangement of two articulated pieces in a bearing segment achieves a high pressure ratio with which large loads can be transmitted in the smallest of spaces. Here, too, the central bearing segment 114 moves up and down in the pressure rocker 111.

An arrangement of parallel pressure modules 201 for clamping, for example, a square tube 26 is shown schematically in FIG. 5. The parallel pressure module 201 here consists of four articulated pieces 205, 206, 207, 208 opposite each other in pairs and two pressure arms 211, 311 opposite each other with respect to the square tube 26 to be tensioned, for example driven by a hydraulic cylinder, the pressure arms 211, 311 each between an outer bearing receptacle 209 and an inner bearing receptacle 210 are guided radially (311) or linearly (211). The ends of the outer joint pieces 205, 208 with respect to the square tube 26 to be tensioned are each mounted on the one hand in the outer bearing receptacles 209 of the fixedly arranged bearing segments 212 and on the other hand in the fixed on the pressure rockers 211, 311 bearing segments 214. Furthermore, the inner joint pieces 206, 207 with respect to the square tube 26 to be tensioned are each supported with their ends on the one hand in the bearing segments 214 fixedly arranged on the pressure rockers 211, 311 and on the other hand in bearing segments 213 guided linearly displaceably in the inner bearing receptacles 210.

In the exemplary embodiment, the upper pressure rocker 211 is guided linearly and the lower pressure rocker 311 - in each case with respect to the square tube 26 - is guided radially. By a linear movement of the pressure rocker 211 to the left (27) and analogously to the radial pressure rocker 311 counterclockwise (28), the joint pieces 205, 206, 207, 208 are brought from the shown extended position into a basic position including an angle , so that the bearing segments 213, which are guided linearly in the inner bearing receptacles 210, carry out an upward stroke and thus release the square tube 26 to be clamped.

If, as indicated in FIG. 5, linearly or radially acting parallel pressure modules 201 are also arranged on the left and right sides, ie on all sides of the square tube 26, this enables the square tube 26 to be clamped centrally on all sides. It is also possible for parallel sides to be parallel Spreading movement are generated that can be used for double-sided clamping tasks. Furthermore, it is possible that the radially or linearly guided movements of the pressure rockers 211, 311 can also be controlled or clocked individually or together with the same principle of action, independently of time - optionally.

It is also within the scope of the configuration options to provide only one bearing point in the bearing segments 214 of the pressure rockers 211, 311, the joint pieces 205, 208 would thus be omitted, as a result of which the stroke path of the parallel pressure modules 201 is halved.

Claims

claims:

1. Parallel pressure module (1; 101) for transmitting parallel pressures for actuating a guided ram pressure plate (2) on a press, consisting of

- at least four solid, one-piece articulated pieces (5, 6, 7, 8; 105, 108) that are opposite each other in pairs

- and a pressure rocker (11; 111) which is guided linearly between two opposite bearing seats (9, 10),

- The articulated pieces (5, 6, 7, 8; 105, 108) at the ends with upper and lower bearing segments (12, 13; 112, 113) fixed in the bearing seats (9, 10) and in the pressure rocker (11; 111 ) arranged middle bearing segments (14; 114) are connected to one another in a simple plug-in manner,

- And wherein the middle bearing segments (14; 114) are guided linearly displaceable perpendicular to the direction of movement of the driven pressure rocker (11; 111).

2. Parallel pressure module (201) for transmitting parallel pressures for clamping workpieces (26) consisting of

- at least four solid, one-piece articulated pieces (205, 206, 207, 208) opposite each other in pairs,

at least two driven pressure rockers (211, 311) located opposite one another with respect to the workpiece (26) to be clamped, - The pressure rockers (211, 311) are each guided radially or linearly between an outer and an inner bearing seat (209, 210),

- and the end of the articulated pieces (205, 208), which are to be clamped with respect to the workpiece (26) to be clamped, in bearing segments (212, 214) which are fixedly arranged on the outer bearing receptacles (209) and the pressure rockers (211, 311),

- And the in relation to the workpiece (26) to be clamped inner joint pieces (206, 207) in the fixed on the pressure rockers (211, 311) bearing segments (214) and in the inner bearing receptacles (210) linearly displaceably guided bearing segments (213) are,

- The joint pieces (205, 206, 207, 208) with the bearing segments (212, 213, 214) are connected to one another in a simple manner.

3. Parallel pressure module according to claim 1 or 2, characterized by a hydraulic, pneumatic or mechanical drive of the pressure rockers (11, 111, 211, 311).

4. Parallel printing module according to claim 1 or 3, characterized in that individual parallel printing modules (1, 101) with the interposition of coupling pieces (22) are arranged in any number side by side, only one drive being required to actuate them.

5. Parallel pressure module according to one of claims 1 to 4, characterized in that the joint pieces (5, 6, 7, 8; 105, 108; 205, 206, 207, 208) and the bearing segments (12, 13, 14; 112, 113, 114; 212, 213, 214) are pluggably connected to one another, the joint pieces (5, 6, 7, 8; 105, 108; 205, 206, 207, 208) being connected to the bearing segments (12, 13, 14; 112, 113, 114; 212, 213, 214) each of the side boundaries (25) that are formed are guided in these in such a way that they cannot be pulled out.

6. Parallel printing module according to one of claims 1 to 5, characterized in that the bearing segments (12, 13, 14; 112, 113, 114; 212, 213, 214) are round or rectangular on their outer circumference.

7. Parallel pressure module according to one of claims 1 to 6, characterized in that all articulated connections, consisting of the articulated pieces (5, 6, 7, 8; 105, 108; 205, 206, 207, 208) and the bearing segments (12 , 13, 14; 112, 113, 114; 212, 213, 214), are connected to a central lubrication system.

8. Parallel pressure module according to one of claims 1 to 7, characterized by a stroke limitation of the pressure rocker (11, 111; 211, 311) via adjustable fixed stops.

9. Parallel pressure module according to one of claims 1 to 7, characterized by a stroke limitation of the pressure rocker (11, 111, 211, 311) via cams.