EP1582338A1 - Press, punch press or forming apparatus - Google Patents

Abstract

The machine has a lower plate, an upper plate with a supporting stand. The lower plate covers a link between the plates and has a driver. The driver moves back and forth in relation to a clamping plate. Guide columns and bushes are assigned in a vertical direction and are adjustably held at a rack. A cooling agent is pumped through a piping system. The guide columns and cooling agents are arranged through into a hollow guide column. The inner walls (62) of the guide columns are sprayable with the cooling agent.

Description

The invention relates to a press or a stamping or forming machine with a frame, a frame base, a frame top and the frame top having on the frame base supporting stand, wherein the frame base a clamping plate and the Gestelloberteil comprises a drive device and with one of the drive means to a and reciprocating with respect to the platen drivable plunger, the by means of guide columns and associated guide bushes in vertical Direction slidably held on the frame, and with a coolant circuit, a coolant pump and a piping system for coolant having.

Such presses, stamping or forming machines are known from EP 1 308 268 A1 known. With their help, workpieces can be punched in a variety of ways or reshape by attaching to the platen and its associated Front side of the ram lower or upper tools are mounted to the Processing of workpieces interact with each other. For this purpose, the Plunger driven by the drive device to a reciprocating motion be, with the ram preferably by means of four mitlaufender Guide columns in the vertical direction slidably guided on the frame.

Object of the present invention is a press or a punching or To provide forming machines of the generic type, which improved Life has.

This task is in a press or in a stamping or forming machine of the aforementioned type according to the invention achieved in that the Guide pillars are hollow and have coolant in the guide columns can be introduced.

In the invention, the idea flows in that by ensuring a as constant as possible temperature levels in particular the guide columns and bushings the life of the press or the punching or Forming machines can be extended. According to the invention, coolant be introduced into the cavity of the guide columns, so that the guide columns have the same temperature level as the remaining functional parts of the press or the stamping or forming machine, which are integrated in the coolant circuit. Be temperature gradient kept low. It has been shown that such temperature gradients the life of the press or of the stamping or forming machine influence negatively.

Of particular advantage is when the guide columns in prestressed Rolling guides are guided. The use of such rolling guides has the Advantage that the risk of tilting movement between the plunger and the Clamping plate can be kept very low. This in turn has Result that the parallelism of the clamping plate and the end face of the plunger even with off-center on the ram attacking forming forces practically not is impaired. This can be a very high quality machining be ensured, because by appropriate bias of the rolling guide the tipping rigidity of the ram can be considerably increased. By the According to the invention used for the inside cooling of the guide columns a narrow tolerance range can be selected for the bias voltages, because temperature influences on the preload of Wälzführung by the effect of the coolant can be minimized. It can thus by the inside cooling of the guide columns not only the life of the press or the punching or forming machines can be improved, but it lets also achieve a higher tilting rigidity of the plunger.

It is advantageous if the inner walls of the guide columns with coolant are sprayable. It has been shown that this is a particularly effective Temperature compensation is achieved because the spraying an effective Heat transfer between the coolant and guide column can be effected can.

In a particularly preferred embodiment, the inner walls of the Guide columns in the amount of at least one guide bush with coolant sprayable, because this can especially during a warm-up phase the press or the stamping or forming machine occurring temperature differences effectively counteracted.

The introduction of coolant in the guide columns takes place in an advantageous Embodiment by means of supply pipes, each in a guide column plunge. The supply pipes can be colinear to the guide columns be aligned.

It is advantageous if the supply pipes relative to the frame immovable are held. This allows the supply pipes, irrespective of the and movement of the guide columns rigidly connected to the plunger have constant position based on the guide bush, by means of of the coolant at a temperature level that is as constant as possible can be kept.

Preferably, the supply pipes comprise at their in the guide column immersed end portion at least one lateral outlet opening for dispensing of coolant in the radial direction. Several outlet openings can be in Circumferentially distributed evenly distributed. In particular, can be provided that the at least one outlet opening in height of a Guide bush extends. The length of the outlet openings having Endbereiches may correspond substantially to the length of the guide bush, For example, the length of the area in which the rolling elements of a Rolling guide are arranged. Preferably, the supply pipes are at their in the guide column immersed end closed frontally.

The tilting stiffness of the tappet guide can be further increased by that each guide column arranged in a above a strip running plane first guide bush and arranged in a below a strip running plane second guide bush is guided, wherein the coolant at least in Height of the first guide bush applied to the inner wall of the guide column is.

It is particularly advantageous if the coolant circuit is a heating element for heating the coolant. This makes it possible, by means of the coolant not only heat during an operating phase of the press or the Punching or forming machines from the guide column and the guide bushes but to dissipate the functional parts of the press or punching or forming machines can be heated by means of the coolant. The Coolant thus serves as a temperature control, d. H. as a heat transfer medium, with the optional heat can be supplied or removed, to the functional parts including the guide columns and bearings temper. In particular, thereby the duration of a warm-up phase be reduced by the functional parts within a short time to a desired operating temperature and then brought on this Temperature can be maintained. The functional parts include here in particular the frame, the drive device, the clamping plate, the Tappet and its leadership as well as the used upper and Lower tool.

Figur 1:

eine schematische Darstellung eines Stanz- oder Umformautomaten;

Figur 2:

eine Schnittansicht längs der Linie 2-2 in Figur 1 und

Figur 3:

eine vergrößerte, teilweise aufgetrennte Darstellung von Detail A in Figur 1.

The following description of a preferred embodiment of the invention serves in conjunction with the drawings for further explanation. Show it:

FIG. 1:

a schematic representation of a stamping or forming machine;

FIG. 2:

a sectional view taken along the line 2-2 in Figure 1 and

FIG. 3:

an enlarged, partially separated representation of detail A in Figure 1.

In the drawing is shown schematically as an example of a punching or forming machines a total occupied by the reference numeral 10 Rapid stamping machine shown with a frame-like frame 12, the one Frame bottom 13 and a supported by four stands 14 on the frame base 13 Gestelloberteil 15 includes. The stands 14 are at the corners a rectangle arranged, as can be seen from Figure 2.

The Gestelloberteil 15 receives a drive means 17 with a rotatable mounted eccentric shaft 18 by means of two connecting rods 20, 21 with a plunger 23 is coupled. The connecting rods 20, 21 are rotatably mounted on the eccentric shaft 18, so that a rotational movement of the eccentric shaft 18 by means of the connecting rod 20, 21 can be converted into a reciprocating motion of the plunger 23.

The effective length of the connecting rods 20 and 21 can each by means of a plunger 23 held adjusting 25 during operation of the high-speed stamping machine 10 are changed. This gives the possibility of the location of the bottom dead center of the plunger 23 to adjust, for example, changes this situation, which are caused by temperature fluctuations, counteract.

As is clear in particular from FIG. 2, the plunger 23 has four retaining arms 28, 29, 30 and 31, each disposed adjacent a stand 14 are and engage around a guide column 33, 34, 35 and 36, respectively, in the respective Holding arm is pressed. The guide columns 33 to 36 are hollow, namely in the form of a tube, and they are vertically aligned.

The displaceable mounting of the guide columns 33 to 36 takes place in each case by means of two guide bushes designed as preloaded rolling guides are, and that are above a strip plane 38, a first Wälzführung 40 and below the strip running plane 38, a second rolling guide 41st arranged. The tape running plane 38 is in this case that plane in which the High-speed stamping machines 10 workpieces to be machined (not shown) between the plunger 23 and one arranged on the frame base 13 Clamping plate 43 are transported.

The first and second Wälzführungen 40 and 41 are designed identically. They each have a bearing bush 45, the preloaded rolling elements without play 46, which on the outside of the guide columns 33, 34, 35th or 36 abut. This becomes clear in particular from FIG.

As already explained, the plunger 23 by means of the eccentric shaft 18 and the Connecting rod 20, 21 reciprocable in the vertical direction. To compensate for In this case occurring mass forces, the drive device 17 comprises a arranged above the eccentric shaft 18 and with this via a connecting rod 48 coupled balancing mass 49, the vertically oriented guide rods 50 is guided.

To occur in continuous operation of the high-speed stamping machine 10 temperature influences minimized and, in particular, to ensure that that the functional parts of the high-speed stamping machine 10 a constant temperature level have, the high-speed punching machine 10 comprises a coolant circuit 52 with a piping system 53, a coolant pump 54 and an integrated into the frame base 13 reservoir 55 for coolant, using oil as the coolant. Within the reservoir 55 a heating element in the form of a heating cartridge 57 is arranged so that the coolant heated during a warm-up phase of the high-speed stamping machine 10 can be to the high-speed stamping machine 10 in the shortest possible time Bring operating temperature, which then during operation is maintained.

In the coolant circuit 52 are integrated supply pipes 59, the Gestelloberteil 15 are held immovable and from above each in one Dip guide column 33, 34, 35 or 36 respectively. This is the example of the guide column 33 is shown in FIG. The supply pipes 59 are at their in the respective guide column 33, 34, 35 and 36 immersed end frontally closed, and immediately adjacent to this end, the supply pipes 59 distributed over its circumference uniformly a plurality of outlet openings 60 on, over the coolant in the radial outward direction on the Inner wall 62 of the respective guide column 33, 34, 35 and 36 sprayed can be. The coolant then flows down the inner wall 62 and is collected in the frame base 13 in the reservoir 55, from where via the coolant pump 54 again in the pipeline system 53rd is introduced, to which the supply pipes 59 are connected.

The outlet openings 60 of the supply pipes 59 are at the level of the rolling elements 46 of the above the belt running plane 38 positioned first Wälzführung 40th arranged. This becomes clear in particular from FIG.

By means of the applied to the inner wall 62 of the guide columns 33 to 36 Coolant, the temperature of the guide columns 33, 34, 35, 36 and the first and second rolling guides 40, 41 including the under bias standing rolling elements 46 are kept constant. This causes a constant bias of the rolling elements 46, and this in turn has to Result that the life of the rolling guides 40, 41 and the guide columns 33 to 36 can be extended considerably. In addition, one of outer Temperature fluctuations virtually independent tilting rigidity of the plunger 23 can be achieved.

Claims (9)

Press, stamping or forming machine with a frame having a frame base, a frame top and the frame top on the frame base supporting stand, wherein the frame base comprises a biasing plate and the frame top receives a drive device, and with one of the drive means for a reciprocating motion with respect to the platen drivable ram, which is held by means of guide columns and associated guide bushes in the vertical direction displaceable on the frame, and with a coolant circuit having a coolant pump and a piping system for coolant, characterized in that the guide columns (33, 34, 35, 36 ) are designed hollow and coolant in the guide columns (33, 34, 35, 36) can be introduced. Press, punching or forming machine according to claim 1, characterized in that the guide columns (33, 34, 35, 36) are guided in pretensioned rolling guides (40, 41). Press, stamping or forming machine according to claim 1 or 2, characterized in that the inner walls (62) of the guide columns (33, 34, 35, 36) can be sprayed with coolant. Press, stamping or forming machine according to claim 1, 2 or 3, characterized in that the inner walls (62) of the guide columns (33, 34, 35, 36) in the amount of at least one guide bush (40) can be sprayed with coolant. Press, stamping or forming machine according to one of the preceding claims, characterized in that in the guide columns (33, 34, 35, 36) in each case a supply pipe (59) is immersed for introducing coolant. Press, punching or forming machine according to claim 4, characterized in that the supply pipe (59) is held immovable relative to the frame (12). Press, stamping or forming machine according to claim 4 or 5, characterized in that the supply pipe (59) at its in the guide column (33, 34, 35, 36) immersed end region at least one lateral outlet opening (60) for discharging coolant in radial direction. Press, stamping or forming machine according to one of the preceding claims, characterized in that the guide columns are each guided in a first guide bushing (40) arranged above a strip running plane (38) and in a second guide bushing (41) arranged below the strip running plane (38) , wherein the coolant at least in the amount of the first guide bush (40) on the inner wall (62) of the guide columns (33, 34, 35, 36) can be applied. Press, stamping or forming machine according to one of the preceding claims, characterized in that the coolant circuit (52) has a heating element (57) for heating the coolant.

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