Process for fine blanking workpieces and fine blanking press

Abstract

To provide a process for fine blanking workpieces with a fine blanking press.SOLUTION: A starting material is clamped between a punch guiding plate and a blanking plate and also between a punch guided in the punch guiding plate and a counter holder guided in the blanking plate and a unit comprising the punch and the counter holder is moved relative to the unit comprising the punch guiding plate and the blanking plate whereby the workpiece is displaced with respect to the starting material along a blanking gap formed between the blanking plate and the counter holder, and is cut out from the starting material, while lubricant is applied into an active zone between the blanking plate and the workpiece, while the lubricant is fed between the blanking plate and the counter holder.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for fine blanking a workpiece from a starting material in a fine blanking press, In the method, the starting material is clamped between a punch guide plate and a blanking plate, and also between a punch guided by the punch guide plate and a counter holder guided by the blanking plate, The unit including the punch and the opposing holder is moved relative to the unit including the punch guide plate and the blanking plate, Thereby, the workpiece is displaced relative to the starting material along the blanking gap formed between the blanking plate and the counter holder, in particular being separated from the starting material, In so doing, a lubricant is applied to the area of ​​action between the blanking plate and the workpiece.

[0002] The present invention also relates to a fineblanking press for fineblanking a workpiece from a starting material, The fine blanking press comprises a punch guide plate and a blanking plate, a punch guided in the punch guide plate and a counter holder guided in the blanking plate, This fine blanking press allows The starting material can be clamped between the punch guide plate and the blanking plate, as well as between a punch guided in the punch guide plate and a counterholder guided in the blanking plate; and the unit including the punch and the opposing holder is movable relative to the unit including the punch guide plate and the blanking plate; Thereby, the workpiece is displaceable relative to the starting material along the blanking gap formed between the blanking plate and the counter holder, in particular detachable from the starting material, In so doing, a lubricant can be applied to the area of ​​action between the blanking plate and the workpiece.

[0003] Fine blanking presses and methods of fine blanking are well known in the prior art.

[0004] In the prior art, and in the present invention, the starting material may be formed, for example, in strip form, for example as a steel sheet, in which case the workpiece is usually cut out completely from the starting material.

[0005] In both the prior art and the present invention, the starting material can be a workpiece previously cut out of a steel sheet, from which partial regions can be cut out again or the workpiece can be deformed according to the above-mentioned steps. Such method steps can be carried out, for example, in a follow-up tool of a fin blanking press.

[0006] In this case, the above-mentioned relative movement is carried out in a clamped state, in particular a permanent clamping force is applied to the starting material between the elements of the two units respectively during the movement, and the relative movement between the units is carried out using a blanking force or a forming force.

[0007] The above-mentioned workpiece is a partial area of ​​the starting material that is either cut off from the remainder of the starting material or at least moved relative to the remainder of the starting material, in the latter case the workpiece remains connected to the remainder of the starting material.

[0008] The above-mentioned working area is the blanking gap, in particular the area of ​​the blanking gap adjacent to the surface of the blanking plate on which the starting material is placed, and / or the blanking plate surface facing the blanking gap, preferably close to the starting material facing the blanking gap, and thus in particular arranged opposite the counterholder and along which the workpiece is moved during the relative movement. The working area is therefore a partial area of ​​the blanking gap and / or the surface of the blanking plate, which extends in the movement direction and, opposite the counterholder, defines the blanking gap. The working area as seen in the stroke direction (direction of relative movement) can be smaller than the total length of the blanking gap as seen in the stroke direction. In particular, the length of the working area as seen in the stroke direction can be less than or equal to the stroke width of the two aforementioned units relative to each other or can be limited to the material thickness of the starting material as seen in the stroke direction.

[0009] The application of lubricant to this area of ​​action is carried out in order to reduce friction and improve the quality of the surface area of ​​the workpiece or starting material produced during the fine blanking process with the blanking plate and which comes into contact with the blanking plate.

[0010] According to the prior art, this application is carried out by applying the lubricant to the starting material before the fine blanking process, so that the lubricant is transported through the starting material to the working area. For this, the lubricant must be applied over a large area, for example by spraying, at least on the side of the starting material facing the blanking plate and the counter holder. This leads to a high consumption of lubricant, since also the areas of the starting material that do not enter or flow into the working area during the fine blanking process are covered with lubricant. Summary of the Invention [Problem to be solved by the invention]

[0011] Against this background, the object of the present invention is to improve the supply of lubricant to the area of ​​application, in particular to save lubricant and to limit the distribution of lubricant on the workpiece. [Means for solving the problem]

[0012] According to the invention, this object is achieved in a method of the type mentioned at the beginning in that the lubricant is supplied to the application area through a blanking gap between the blanking plate and the counterholder, the supply of the lubricant therefore being carried out through the blanking gap parallel to or in the direction of movement of the counterholder.

[0013] In a fine blanking press of the above mentioned kind, said object is achieved in that the fine blanking press is equipped with a device capable of supplying lubricant to the area of ​​action through the blanking gap between the blanking plate and the counter holder.

[0014] According to the invention, this is achieved by applying lubricant only where it is needed during the fine blanking process, i.e. in the blanking gap and / or in the surface areas of the workpiece which, due to the above-mentioned relative movement, come into increased contact with the surface areas of the blanking plate at the border with the blanking gap, thus effectively preventing the distribution of lubricant to other surface areas, thereby reducing the amount of lubricant required.

[0015] In this case, the invention can preferably provide for the lubricant to be supplied to the area of ​​action through a groove or slot, preferably a groove or slot extending over at least a region in the direction of relative movement, which groove or slot is arranged in the surface of the blanking plate facing the opposite surface of the counter-holder and / or in the surface of the counter-holder facing the opposite surface of the blanking plate, so that a channel can be formed which is defined by the slot or groove and the surface of the opposite element.

[0016] Preferably, opposing surfaces are meant to define a blanking gap therebetween. The grooves / slots formed in both surfaces may preferably be offset from one another.

[0017] It is particularly preferred that such grooves or slots are not formed in the surface of the blanking plate, but only in the surface of the counterholder which, viewed in the stroke direction, extends between the underside and the surface of the counterholder and defines the blanking gap on the side of the counterholder, in which case the grooves prevent any impairment of the surface quality on the cutting edge / blanking surface of the workpiece during fine blanking.

[0018] Regardless of whether the grooves or slots are arranged on the surface of the counter holder or on the surface of the blanking plate, in a first preferred embodiment it is intended that the grooves / slots, respectively, extend over substantially the entire length of the surface as viewed in the stroke direction.

[0019] In a second preferred embodiment, it is provided that all of the plurality of grooves / slots extending in the stroke direction are divided into at least two groups of grooves / slots, each of which extends over only one (in particular different) partial region of the total length of the surface as viewed in the stroke direction.

[0020] In this case, two adjacent groups of grooves / slots successive in the stroke direction are connected by a circumferential groove / slot extending in a plane in the circumferential direction around the stroke direction, and more preferably, the grooves / slots of different groups extending in the stroke direction may be offset from each other in this circumferential direction.

[0021] Preferably, the invention provides that in the case of the first or second embodiment, the grooves / slots extending in the stroke direction, in particular the last group of grooves / slots in the stroke direction located in the direction of the workpiece, merge at the end of the surface facing the workpiece as seen in the stroke direction into a circumferential slot / groove formed in the surface in the circumferential direction around the stroke direction and opening in the direction of the workpiece. This circumferential groove is thus located at the end of the blanking gap facing the workpiece and ensures that the lubricant can be distributed very easily along the blanking gap. The invention preferably provides that by applying pressure to the lubricant, the lubricant is conveyed through the blanking gap, in particular in the direction of the starting material, for which purpose a space area is arranged in the blanking press, in particular in the tool underpart of the blanking press comprising a blanking plate and a counterholder movably supported in the tool underpart, which is filled with lubricant and can be pressed or is pressed during the blanking process, into which the blanking gap opens, in particular the grooves / slots open, or which is connected to the working area via the blanking gap, in particular via a slot / groove which preferably extends into the blanking gap.

[0022] The application of pressure for conveying the lubricant through the blanking gap while carrying out the above-mentioned relative movement of the units can be carried out by any device suitable for temporarily increasing the pressure in the spatial area during the relative movement, in particular only during the temporal phase of storing the counter holder in the blanking plate, in particular away from the starting material.

[0023] Such a device can be formed, for example, by a cyclically operating pump, which during its entry movement creates in its working area the pressure required to transport the lubricant through the blanking gap.

[0024] Particularly preferably, the invention provides that at least a part of the pressure required for the supply, or the required pressure, is generated completely or at least mainly by movement of the counterholder into a spatial region containing / conveying the lubricant, in particular into said spatial region arranged on the side of the counterholder opposite the starting material, in particular directly behind it. Preferably, the counterholder can be moved in this spatial region, thereby forming a piston which changes the volume of the spatial region.

[0025] For example, the lubricant in this spatial area may initially be under a first pressure level, in particular a first pressure level that is not yet sufficient to transport the lubricant into the working area, whereupon the initial movement of the counter holder causes it to move in the direction of the spatial area, in particular in a direction in which the volume of the spatial area is reduced, thereby causing an increase in the pressure of the lubricant during the period of movement towards the spatial area due to compression in the spatial area, as a result of which the pressure level is raised to a level that is sufficient, in particular to transport a sufficient amount of lubricant through the blanking gap into the working area.

[0026] Preferably, the pressure is intended to be generated during and / or by movement of lubricant from the spatial region in the direction of the lubricant reservoir against the influence of a line resistance in at least one line formed between the lubricant reservoir and the spatial region, the spatial region being supplied with lubricant from the lubricant reservoir.

[0027] Thus, the pressure increase is caused by compression of the lubricant, which does not impede movement of the counter holder, but only increases the pressure as further movement of the counter holder is made possible by the movement of lubricant in the direction of the lubricant reservoir.

[0028] Supply of lubricant to the spatial region can be achieved, for example, by using a pump or by forming a lubricant reservoir as a pressure accumulator which supplies lubricant under pressure to the spatial region.

[0029] By moving the lubricant in the direction of the lubricant reservoir, it is possible to take into account that in normal structural designs the volume of lubricant moved in the spatial area by the movement of the counter holder is greater than the volume required in the action area.

[0030] Thus, movement of the opposing holder in a direction into the spatial area, in particular in a direction reducing the volume of the spatial area, causes a portion, in particular a major portion of the displaced lubricant volume, to move towards the lubricant reservoir and another portion, in particular a smaller portion of the lubricant, to move into the action area.

[0031] Here, the invention can preferably provide that the movement of the lubricant from the spatial region in the direction of the lubricant reservoir takes place via at least one throttle valve, in particular so that the level of the generated pressure is adjustable, whereby such a throttle valve is preferably arranged in at least one line that runs between and connects the lubricant reservoir and the spatial region.

[0032] In this case, the invention provides that the throttle valve is preferably only active, preferably only through the throttle valve, when the lubricant moves from the spatial region in the direction of the lubricant reservoir, i.e., due to the required pressure increase, and that preferably the throttle valve is not active, in particular is bypassed, when the lubricant is conveyed from the lubricant reservoir in the direction of the spatial region. For this purpose, for example, a combination of a throttle valve and a check valve connected in parallel can be used.

[0033] The present invention preferably contemplates that the lubricant is circulated between the lubricant reservoir and the spatial region by means of at least one pump.

[0034] In such an embodiment, it may be provided that the lubricant is preferably led through the blanking plate by at least one line, in particular a supply line and a return line of the circulation line.

[0035] The device for conveying the lubricant through the blanking gap to the working area is preferably formed at least partially in the tool underpart, which comprises the blanking plate and the counterholder as well as a space area which is filled with lubricant or at least can be filled with lubricant, into which the counterholder moves and which space area is in particular in circulatory connection with a lubricant reservoir.

[0036] The invention further preferably provides that the lubricant moves into the spatial region through a throttle valve in a return line between the spatial region and the lubricant reservoir during movement of the counter holder, whereupon a check valve arranged in the supply line closes due to the pressure or flow generated in the lubricant by the counter holder.

[0037] Thus, when the counter holder is moved into the spatial area, it is ensured that the lubricant is not pushed back towards the pump in all line cross sections, but that a flow of the lubricant also occurs through the throttle valve in the return line or only through the throttle valve.

[0038] It may also be contemplated that the lubricant may also be moved through a throttle valve in the supply line between the spatial region in the lubricant reservoir and the pump, arranged in parallel with a closing / closed check valve in the supply line, as the lubricant moves through the opposing holder into the spatial region.

[0039] This means that a return flow of lubricant to the lubricant reservoir with the necessary pressure generation can also occur in the supply line, whereby the lubricant can flow into the spatial area, for example by means of a pump or through an open check valve, bypassing the throttle valve in the supply line, on the return stroke of the opposing holder out of the spatial area.

[0040] During the return stroke of the counter holder away from the spatial area in the direction of the starting position, in particular a return stroke causing an increase in the volume of the spatial area, the lubricant may flow from the lubricant reservoir to the spatial area through at least one open check valve, in particular the return stroke is effected by a pressure bolt acting on the counter holder extending through the spatial area.

[0041] The return stroke can therefore be carried out as normal in a fin blanking press, or it can be contemplated that the return stroke is carried out, or at least facilitated, by lubricant under pressure.

[0042] In a preferred development, it can be provided that the wear of the punch is also reduced on the punch side, in particular in the area of ​​the punch which contacts the remaining part of the starting material during the stroke.

[0043] For this purpose, the fine blanking press preferably comprises a device by which the lubricant can be guided into the gap present between the punch guide plate and the punch, in particular through this gap in the direction of the starting material.

[0044] Further preferably, the gap between the punch and the punch guide plate is acted upon by a lubricant, in particular only by the effect of gravity on the lubricant, which is stored in a lubricant reservoir surrounding the part of the punch protruding from the punch guide plate, in particular on the side of the punch guide plate opposite the starting material / blanking plate. Preferably, the reservoir is open to the atmospheric environment, in particular so that there are no driving pressure potentials acting on the lubricant.

[0045] The lubricant reservoir is preferably arranged in a frame-shape / ring-shape around the punch, with the outer surface of the punch facing radially outward forming the wall of the reservoir which can be moved in a stroke, so that, in addition to the effect of gravity, the lubricant is also carried along into the above-mentioned gap, so that the lubricant reaches the radially outer surface of the punch close to its axial end face with which the starting material comes into contact, through the gap, where it has a friction-reducing effect.

[0046] Additionally, the present invention allows lubricant to be provided, for example, in a reservoir that is refilled on a consumption basis or continuously.

[0047] Embodiments of the invention will now be described with reference to the following drawings. [Brief description of the drawings]

[0048] [Figure 1] Fine blanking press equipment [Diagram 2] Fine blanking press equipment [Diagram 3] Fine blanking press equipment [Figure 4] Opposing Holder DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0049] FIG. 1 shows a fine blanking press or a tool of a fine blanking press in a starting position, where the starting material 3 is already clamped between the units consisting of the punch guide plate 5 and blanking plate 6, as well as the punch 4 and the counter holder 7, but no relative movement has yet taken place between these respective units 5 / 6 and 4 / 7 for blanking purposes, in particular for separating the workpiece 3a from the starting material 3 or for forming the workpiece 3a.

[0050] FIG. 2 shows the same arrangement after relative movement of the units.

[0051] The figure shows the part of a fine blanking press essential to the invention, without showing the drive unit. Here, the figure shows a tool 1, 2 divided into an upper tool part 1 and a lower tool part 2.

[0052] Between these two tool parts 1, 2 a starting material 3 in strip form, for example a steel strip, is passed, from which a workpiece 3a is cut out.

[0053] For the blanking process, in a manner that is usually known, in the case of a fine blanking process, on the one hand the starting material 3 is clamped between a punch guide plate 5 and a blanking plate 6. These two elements clamp, for example, the areas of the starting material that remain in the starting material during the blanking process. On the other hand, the starting material is clamped between a punch 4 and a counterholder 7. The areas clamped by these elements 4, 7 are, for example, the areas that are cut off from or displaced relative to the starting material 3 during the blanking process and form the workpiece 3a.

[0054] The blanking process itself is produced by moving the unit consisting of punch 4 and counter holder 7 relative to the unit consisting of punch guide plate 5 and blanking plate 6 (downwards in this embodiment according to FIG. 2), with the movement taking place in the clamped state of all units.

[0055] Along the blanking gap 6a formed between the blanking plate 6 and a counter-holder 7 which is movable downwards in the blanking gap, the workpiece 3a is displaced out of the plane of the starting material 3 and, if the movement of the counter-holder 7 is longer than the thickness of the starting material 3, it is detached from said starting material 3, otherwise it is only formed.

[0056] Here, the invention provides that in this embodiment, a spatial area 13a filled with lubricant 13 is provided below the counterholder 7. During the movement of the clamped unit consisting of the punch 4 and the counterholder 7 away from the plane of the starting material 3, the counterholder 7 is moved into this spatial area 13a and compresses the lubricant 13 there, so that due to the resulting increase in pressure, the lubricant 13 is at least partially displaced in opposition to the current movement of the counterholder 7 through the blanking gap 6a to the action area 18. In this way, a precise application of the lubricant 13 in the action area 18 can be achieved, since the action area 18 is in fact formed by the upper end of the blanking gap 6a, in particular on the side of the blanking plate 6 and / or by the surface of the blanking plate 6 facing the blanking gap. During the displacement, the workpiece 3a gradually comes into contact with this area of ​​the blanking plate 6.

[0057] The movement of the lubricant 13 from the spatial region 13a through the blanking gap 6a can be facilitated by forming channels in the blanking gap 6a, through which the lubricant 13 can be transported by pressure. Such channels are preferably formed by grooves / slots in the surface of the counterholder 7, which face towards the blanking gap 6a, i.e. lie in particular parallel to the direction of movement. Such grooves / slots therefore also lead into the spatial region 13a.

[0058] Here, the embodiment shown is such that the lubricant 13 is pumped by a pump 16 from a lubricant reservoir 17 via a supply line 14 into the spatial area 13a and from there through a return line 15 back to the lubricant reservoir 17. A lubricant circuit is thus present, in particular, in which the lubricant 13 is pumped in a circulating manner, independently of the stroke movement of the fineblanking press.

[0059] The movement of the counterholder 7 also allows the lubricant 13 to move from the spatial area 13a back into the lubricant reservoir 17 when the counterholder 7 moves into the spatial area 13a. Furthermore, during the return movement from the spatial area 13a, the lubricant 13 can be drawn off from the lubricant reservoir 17, in particular whereby the filling of the spatial area 13a with the lubricant 13 is also promoted by the pump 16.

[0060] In order to achieve the necessary, sufficiently high pressure for the movement of the lubricant 13 into the working area 18, the movement of the lubricant 13 out of the spatial area 13a in the direction of the lubricant reservoir 17 is carried out both in the supply line 14 and in the return line 15 via preferably adjustable throttle valves 11, 12.

[0061] In this case, each non-return valve is connected in parallel to the respective throttle valve, which check valve closes in the spatial area 13a during the stroke movement of the counterholder 7 and thus ensures that the lubricant 13 can only flow through the throttle valves 11, 12. During the return stroke of the counterholder 7, i.e. leaving the spatial area 13a, in particular for discharging the workpiece 3a, the check valves open and allow a return flow of the lubricant into the spatial area 13a that is not influenced by the throttle valves 11, 12. The throttle valves therefore have a throttling effect on the lubricant 13 only during the downward stroke of the counterholder 7, but do not act during the upward return stroke of the counterholder 7.

[0062] The return stroke may here be produced by a return stroke force being applied to the counter-holder 7 by a drive (not shown) via the pressure bolt 8, which pushes the counter-holder 7 out of the spatial area 13a. As a result, the volume of the spatial area 13a increases again and the lubricant 13 is sucked into it, which is in particular facilitated by the effect of the pump 16.

[0063] The spatial area 13a is here bounded upwardly by the underside of the counter holder 7, laterally by the wall of the blanking plate 6 which surrounds the blanking gap 6a on the side of the blanking plate 6, and downwardly by a plate arranged in the lower workpiece part 2 and through which passes a pressure bolt 8 sealed, in particular by a seal 10.

[0064] To prevent lubricant 13 from reaching between the blanking plate 6 and the aforementioned plate due to accumulated pressure, the blanking plate 6 may be sealed against the aforementioned plate by means of a seal 9, in particular on the underside.

[0065] Here, the device of the fine blanking press for supplying lubricant 13 through the blanking gap 6a to the working area 18 is formed partly in the lower tool part 2, i.e. by the line and space areas 13a of the blanking plate 6, and partly from there externally by a pump and lubricant reservoir 17, if necessary a throttle valve 11 and a check valve.

[0066] Compared to the prior art, the invention has the advantage that the lubricant 13 is applied with each stroke of the counter holder 7, here downwards, which causes blanking, only in the area of ​​action 18, and thus in the area where lubricant is required. Excessive application can therefore be avoided.

[0067] FIG. 3 shows a further embodiment of the invention after relative movement of the units as in FIG. 2, which includes all the features described in relation to FIGS. 1 and 2, but is intended as a further development for supplying lubricant to punch 4.

[0068] To achieve this, a lubricant reservoir 21 is arranged above the punch guide plate 5, in particular above the punch guide pressure plate 19 which rests on the punch guide plate 5, and which surrounds the punch 4 in a frame-like / ring-like manner, in particular surrounding the part of the punch which protrudes upwards from the punch guide plate 5 / punch guide pressure plate 19, in particular radially outwardly around the punch 4.

[0069] The radially outwardly facing wall of the punch 4 is then a movable wall area which defines radially inwardly a reservoir 21 and which is wetted by the lubricant 13. The reservoir 21 may be limited radially outwardly by a limiting ring 20. Alternatively, the reservoir may be arranged as a ring-like / frame-shaped recess in the upper part of the punch guide plate 5 or punch guide pressure plate 20.

[0070] The reservoir 21 is preferably open to the atmosphere, so that the lubricant 13 is preferably guided only by the effect of gravity and / or by the movement of the punch 4 itself into the gap 5a between the punch 4 and the punch guide plate 5, in particular downwards through this gap 5a to the surface of the starting material. In this way, the lubricant 13 can reach the area where the punch 4 and the rest of the starting material 3 come into contact and friction and wear of the punch 4 can be reduced.

[0071] FIG. 4 shows an embodiment for forming grooves / slots 7a, 7b, 7c in the surface of the counterholder 7 for supplying the lubricant 13 from the spatial region 13a to the working region. In this embodiment, the total number of grooves / slots comprises several groups G1, G2, G3, where it can be seen that in each group G1, G2, G3 the grooves / slots extend in the stroke direction or in the direction of relative movement. In each group the grooves / slots 7a extend over a part of the total length of the counterholder seen in the stroke direction. The grooves 7a of adjacent groups are respectively connected by grooves / slots 7b extending in the circumferential direction. The grooves / slots 7a of the last group G3, which is closest to the workpiece 3a, are arranged at the axial end of the counterholder 7 facing the workpiece or starting material and open into a circumferential groove / slot 7c which is open in the direction towards the workpiece or starting material. In this way the lubricant supplied through the grooves / slots 7a, 7b, 7c can be distributed on the surface of the starting material along the blanking gap.

Claims

1. 1. A method for fine blanking a workpiece (3a) from a starting material (3) in a fine blanking press, comprising the steps of: In the method, the starting material (3) is clamped between a punch guide plate (5) and a blanking plate (6), and is also clamped between a punch (4) guided in the punch guide plate (5) and a counter holder (7) guided in the blanking plate (6), and the unit consisting of the punch (4) and the counter holder (7) is moved relative to the unit consisting of the punch guide plate (5) and the blanking plate (6), Thereby, the workpiece (3a) is displaced relative to the starting material (3) along the blanking gap (6a) formed between the blanking plate (6) and the counter holder (7), in particular being separated from said starting material (3), In the process, a lubricant (13) is applied to the area of ​​action (18) between the blanking plate (6) and the workpiece (3a), In this case, the lubricant (13) is supplied to the action area (18) through the blanking gap (6a) between the blanking plate (6) and the counter holder (7) by applying pressure to the lubricant (13). In the method, in a lower tool part (2) of a blanking press comprising the blanking plate (6) and the counter holder (7) movably supported in the lower tool part, a space area (13a) is arranged on the side of the counter holder (7) opposite the starting material (3) which is filled with a lubricant (13) and which can be and is pressed during the blanking process, This spatial region is connected to the active region (18) through a fine blanking gap (6a), At least part of the pressure required for the supply is generated by the movement of the counter holder (7) into the spatial area (13a) which guides the lubricant (13). A method comprising:

2. the lubricant (13) is supplied through a groove or slot (7a) extending along the direction of relative movement in at least some areas, said groove or slot (7a) being arranged in the surface of said blanking plate (6) facing the opposite surface of said counter holder (7) and / or being arranged in the surface of said counter holder (7) facing the opposite surface of said blanking plate (6), 2. The method of claim 1 .

3. the groove extends, as viewed in the stroke direction, between its underside and a surface in the stroke direction and is formed only in the surface of the counterholder (7) which defines the blanking gap on the side of the counterholder, 3. The method of claim 2 .

4. all of the plurality of grooves / slots extending in the stroke direction are divided into at least two groups of grooves / slots; the grooves / slots of each group each extend over a different partial area of ​​the total length of the surface, viewed in the stroke direction, two adjacent groups of grooves / slots successive in the stroke direction are respectively connected by a circumferential groove / slot extending on the surface in a circumferential direction around the stroke direction; In particular, the slots / grooves of different groups extending in the stroke direction are offset from one another in this circumferential direction.

4. The method according to claim 2 or 3.

5. a pressure is generated during and / or due to the movement of the lubricant (13) from the spatial area (13a) in the direction of the lubricant reservoir (17) against the influence of a line resistance in at least one line (14, 15) formed between the lubricant reservoir (17) and the spatial area (13a), At that time, the lubricant (13) is supplied to the spatial region (13a) from the lubricant oil reservoir (17).

5. The method according to claim 1, wherein the first and second electrodes are arranged in a first direction.

6. the movement of the lubricant (13) from the spatial region (13a) in the direction of the lubricant reservoir (17) takes place through at least one throttle valve (11, 12), in particular the level of the generated pressure being adjustable by means of the throttle valve; 6. The method of claim 5 .

7. the lubricant (13) is guided in circulation between said lubricant reservoir (17) and said spatial area (13b) by means of at least one pump (16); 7. The method according to claim 5 or 6.

8. a lubricant (13) is guided through said blanking plate (6) by means of said at least one line (14, 15), in particular by means of a supply line (14) and a return line (15) of a circulation line, The method according to any one of claims 1 to 7.

9. when the counter holder is moved into the spatial region (13a), the lubricant (13) moves through a throttle valve (12) in a return line (15) between the spatial region (13a) and the lubricant reservoir (17) into the lubricant reservoir (17), while a check valve arranged in a supply line (14) closes due to the pressure generated in the lubricant (13) by the counter holder (7), 9. The method according to claim 7 or 8.

10. when moving the counter holder into said spatial region (13a), the lubricant (13) moves into said lubricant reservoir (17) through a throttle valve (11) in the supply line (14) between said spatial region (13a) and a pump (16), which is arranged in parallel with a closing / closed check valve in the supply line (14), The method according to any one of claims 7 to 9.

11. in the return stroke of the counter holder (7) away from the spatial area (13a) towards the starting position, lubricant (13) flows from the lubricant reservoir (17) to the spatial area (13a) through at least one open non-return valve, in particular the return stroke being effected by a pressure bolt (8) acting on the counter holder (7) which extends through the spatial area (13a), The method according to any one of claims 7 to 10.

12. The gap (5a) between the punch (4) and the punch guide plate (5) is acted upon by a lubricant (13); in particular acting only by the effect of gravity on the lubricant (13), which is stored in a lubricant reservoir (21) surrounding the part of the punch (4) protruding from the punch guide plate (5), in particular the side of the punch guide plate (5) opposite the starting material (3) / the blanking plate (6), In particular, this lubricant reservoir (21) is open to the atmospheric environment. The method according to any one of claims 1 to 11.

13. A fine blanking press for fine blanking a workpiece (3a) from a starting material (3), comprising: The fine blanking press is the starting material (3) can be clamped between a punch guide plate (5) and a blanking plate (6), and between a punch (4) guided in the punch guide plate (5) and a counter holder (7) guided in the blanking plate (6), and the unit consisting of the punch (4) and the counter holder (7) is movable relative to the unit consisting of the punch guide plate (5) and the blanking plate (6), whereby the workpiece (3a) can be displaced relative to the starting material (3) along a blanking gap (6a) formed between the blanking plate (6) and the counter holder (7) and in particular can be separated from the starting material (3), In this case, a lubricant (13) can be applied to the area of ​​action (18) between the blanking plate (6) and the workpiece (3a), the fine blanking press comprises a device by which a lubricant (13) can be supplied to an application area (18) through a blanking gap (6a) between said blanking plate (6) and said counter holder (7) by applying pressure thereto, In the fine blanking press, in a lower tool part (2) comprising said blanking plate (6) and said counter holder (7) movably supported in said lower tool part, a spatial area (13a) is arranged on the side of said counter holder (7) opposite said starting material (3) which is filled with a lubricant (13) and which can be and is pressurized during the blanking process, This spatial region is connected to the active region (18) through a fine blanking gap (6a), At least a part of the pressure required for the supply can be generated by the movement of the counter holder (7) into the space area (13a) which guides the lubricant (13). A fine blanking press characterized by:

14. a device capable of guiding a lubricant (13) into the gap (5a) present between the punch guide plate (5) and the punch (4), in particular through this gap (5a) in the direction of said starting material (3), 14. A fine blanking press according to claim 13.

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