This application claims the priority of 100 65 255.7, filed in Germany, on Dec. 29, 2000 the disclosure of which is expressly incorporated by reference herein.
The present invention relates to a press having a slide which can be driven by one or more knee elements by a driving device for carrying out a stroke movement. Furthermore, the present invention relates to a multi-station press having at least two individual presses arranged behind one another and which each have at least one slide that can be drawn by one or more knee elements for carrying out a stroke movement.
Knuckle joint presses have been known for some time from the prior art. DE-PS 47229 describes, for example, such a knuckle joint press. Recently, however, these knuckle joint presses have increasingly been replaced by eccentric presses which are better suited for different tasks and which frequently achieve better results.
A multi-station press of this newer type is described in DE 198 51 743 A1. A disadvantage of such presses is, however, their high-expenditure construction, particularly as far as the separate drive for the individual presses is concerned.
An object of the present invention is, therefore, to improve the usage possibilities of presses or multi-station presses in which the slide can be driven by way of at least one knee link element by a driving device.
According to the invention, this object has been achieved by providing that the at least one knee link element is operatively connected by at least one connection element with another knee link element operatively mounted on the at least one slide.
As a result of the least one additional knee link element, which is connected with the first knee link element by way of at least one connection element, the slide, on one hand, can apply a far higher force than previously and, on the other hand, because of the kinematics, which can have a versatile design, can achieve a significantly greater variability of the press.
A multi-station press, in which the individual slides can be driven by way of at least on knee link element by a driving device, and in the case of which the at least one knee link element of a slide of a first individual press is connected by way of at least one connection element with the knee link element of the slide of the following individual press, is one currently contemplated embodiment of the present invention. It is particularly advantageous that only a single driving device is required for all individual presses or press stations.
Other objects, advantages and novel features of the present invention will become apparent from the following detailed description of the invention when considered in conjunction with the accompanying drawings.
In
The press 1 is constructed as a knuckle joint press and, for this purpose, has two knee link elements 5a, 5bwhich are arranged behind one another in the operative direction designated by arrow X of the connecting rod, thus the direction which is perpendicular to the moving direction designated by arrow Z of the slide 2. The two knee link elements 5a, 5beach have a first link 6a, 6b respectively which is in each case connected with an upper element 7 connected with the press 1 and disposed in the headpiece of the press 1; a second link 8a, 8b which, in each case, is mounted on the slide 2; and a third link which is called a connection link 9a, 9b and which connects the two above-mentioned links 6a, 6b as well as 8a, 8b respectively in an articulated manner. Hinge points 10a, 10b are therefore situated between the first links 6a, 6b and the connection links 9a, 9b. Hinge points 11a, 11b are situated between the second links 8a, 8b as well as the connection links 9a, 9b. In the present case, the connecting rod 4 is applied to the two hinge points 10a, 11a of the first knee link element 5a.
The two knee link elements 5a, 5b are connected with one another by two connection elements 12, 13 which in the illustrated embodiment extend parallel to one another, so that the movement applied by the connecting rod 4 to the first knee link element 5a is transmitted by way of the transmission elements 12, 13 to the second knee link element 5b. By connecting the knee link elements 5a, 5b behind one another, a variable and forceful drive for the slide 2 is obtained. The application of the connection elements 12, 13 takes place to the hinge points 10a, 10b of the first knee link elements 5a and to the hinge points 11a, 11b of the second knee link elements 5b. The connection element 12 is therefore arranged at the top, and the connection element 13 is arranged at the bottom, thus on the side facing the slide 2.
In the illustrated embodiment, the levers 6a, 8a, 9a of the first knee link element 5a have the same length as the levers 6b, 8b, 9b of the second knee link element 5b. Because the connection elements 12, 13 also have the same length, the slide 2 is oriented in parallel. Here, it should be noted that, on one hand, optionally one of the connection elements 12 or 13 could be eliminated and that, on the other hand, naturally also more than two knee link elements 5a, 5b respectively assigned to the slide 2 can be connected behind one another in the x-direction. The above-described relationships are partially more easily recognizable in FIG. 2.
Of course, any other number of press stations 1′, 1″, . . . arranged behind one another in the x-direction are also contemplated. In the individual press stations 1′, 1″, . . . respective succeeding operations are carried out, in which case respective workpiece transport devices, which are not shown but are known per se, may be arranged between the individual press stations 1′, 1″, . . .
In addition to the connection of the individual knee link elements 5a, 5b by way of the connection elements 12 an 13, the knee element 5b of one press 1′ which, in the X-direction, is the farthest away from the driving device 3, is connected by way of connection elements 15, 16 with the knee link element 5a of the next press 1″ which, in the X-direction, is situated the closest to the knee link element 5a. As illustrated in
In the present embodiment, the two connection elements 15, 16 have the same length. The two connection elements 15, 16 can also have different lengths or the length of at least one of the connection elements 15 or 16 can be adjusted optionally automatically. In this manner, a lagging, that is, a phase shift, of the slide 2″ of the first press 1″ can be adjusted in comparison to the slide 2′ of the first press 1′. As a result of this lagging, the required central driving torque of the driving device 3 is reduced to permit the use of a smaller driving device 3, i.e, of a driving device 3 with a lower output.
The individual slides 2 of the respective presses 1 can be locked with one another, resulting in a completely uniform movement of the individual slides 2′, 2″ . . . It is therefore possible to combine the individual slides 2′, 2″, . . . such that virtually one very long slide 2 is created so that components can be machined in an oblong manner.
Furthermore,
A tool 18 is shown in
Two first knee link elements 20a and two additional knee link elements 20b are assigned to the outer slide 2a which is used as a so-called blank holder for holding the workpiece during the forming of the latter by the inner slide 2b. The connection of the individual knee link elements 5a, 5b as well as 20a, 20b is implemented by corresponding elements as described with reference to
The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.
Number | Date | Country | Kind |
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100 65 255 | Dec 2000 | DE | national |
Number | Name | Date | Kind |
---|---|---|---|
2087811 | Issac | Jul 1937 | A |
2532672 | Michael et al. | Dec 1950 | A |
3520252 | Jureit et al. | Jul 1970 | A |
3695090 | Kita | Oct 1972 | A |
3785282 | Kamelander | Jan 1974 | A |
4184396 | Hafner | Jan 1980 | A |
4434646 | Maeda et al. | Mar 1984 | A |
5592876 | Son | Jan 1997 | A |
5746123 | Eigenmann | May 1998 | A |
5823087 | Eigenmann | Oct 1998 | A |
Number | Date | Country |
---|---|---|
531071 | Aug 1931 | DE |
0101590 | Feb 1984 | DE |
9417269 | Mar 1995 | DE |
19642962 | Apr 1998 | DE |
10047729 | Apr 2002 | DE |
02046995 | Feb 1990 | JP |
Number | Date | Country | |
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20020104364 A1 | Aug 2002 | US |