Method for fine cutting workpiece and fine blanking press

Abstract

The invention relates to a method for finish-cutting a workpiece (3a) from a starting material (3) in a finish-cutting press, and to a finish-cutting press, in which in a die lower part (2) comprising a cutting plate (6) and an ejector (7) movably mounted in the cutting plate, the workpiece (3a) is cut off from the starting material (3) on the side of the ejector (7) facing away from the starting material (3). According to the invention, a space region (13a) which is filled with the lubricant (13), can be subjected to pressure and is pressurized during the cutting process is arranged, said space region being connected to the active region (18) via the cutting gap (6a), at least part of the pressure required for the supply being generated by the movement of the pushing element (7) into the space region (13a) which guides the lubricant (13).

Description

Technical Field

[0001] The invention relates to a method for fine-cutting a workpiece from a raw material in a fine-blanking press, wherein the raw material is clamped between a punch guide plate and a cutting plate and also between a punch guided in the punch guide plate and a push piece guided in the cutting plate, and a unit consisting of the punch and the push piece is moved relative to a unit consisting of the punch guide plate and the cutting plate, whereby the workpiece is displaced relative to the raw material along a cutting gap formed between the cutting plate and the push piece, in particular separated from the raw material, wherein a lubricant is applied in the action zone between the cutting plate and the workpiece.

[0002] The present invention also relates to a fine stamping press for fine cutting a workpiece from a raw material, the fine stamping press comprising a punch guide plate and a cutting plate, a punch guided in the punch guide plate and a push piece guided in the cutting plate, by means of which the raw material can be clamped between the punch guide plate and the cutting plate and also between the punch guided in the punch guide plate and the push piece guided in the cutting plate, the unit consisting of the punch and the push piece can move relative to the unit consisting of the punch guide plate and the cutting plate, thereby enabling the workpiece to be displaced relative to the raw material along a cutting gap formed between the cutting plate and the push piece, in particular enabling the workpiece to be separated from the raw material, wherein a lubricant can be applied in the action area between the cutting plate and the workpiece. Background Art

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

[0004] In the prior art, and also in the present invention, the raw material can be configured into, for example, a strip shape, such as a steel plate. In this case, the workpiece is usually cut completely from the raw material.

[0005] However, in the prior art and also in the present invention, the raw material can also be a workpiece previously cut out of a sheet, from which a partial area is cut out again, or the workpiece is deformed according to the steps described at the beginning. For example, such method steps can be carried out in a continuous die of a fine blanking press.

[0006] Here, the relative movement takes place in a clamped state, so that, in particular in this clamped state, a permanent clamping force is exerted on the raw material between the elements of the two corresponding units during the movement and the relative movement between the units is implemented in such a way that cutting or deforming forces are generated.

[0007] The workpiece is a partial region of the raw material, that is, either the partial region is separated from the remainder of the raw material, or at least the partial region is displaced at least relative to the remainder of the raw material. In the latter case, the workpiece remains connected to the remainder of the raw material.

[0008] The active zone is the cutting gap, in particular such a region of the cutting gap, i.e., this region is adjacent to the surface of the cutting board on which the raw material is placed and / or the surface of the cutting board facing the cutting gap, preferably, the active zone is such a region of the cutting board surface close to the raw material, i.e., this cutting board surface faces the cutting gap, i.e., in particular, is arranged opposite to the thrust piece and along which the workpiece moves during relative movement. Thus, the active zone is such a partial region of the cutting gap and / or the surface of the cutting board, i.e., this partial region extends along the direction of movement and delimits the cutting gap together with the thrust piece in a positionally relative manner. Viewed in the stroke direction (direction of relative movement), the active zone can be smaller than the total length of the cutting board viewed in the stroke direction. In particular, the length of the active zone viewed in the stroke direction can be smaller than or equal to the stroke range of the two units relative to each other, or be limited to the material thickness of the raw material viewed in the stroke direction.

[0009] In order to reduce friction and improve quality at the surface areas of the workpiece or raw material which are produced during the fine cutting process with the cutting plate and which come into contact with the cutting plate, lubricants are applied in the action zone.

[0010] According to the current prior art, the lubricant is applied to the raw material before the finish cutting process so that the lubricant is transferred through the raw material into the active zone. To date, for this purpose, the lubricant had to be applied over a large area, for example by spraying, at least on the side of the raw material facing the cutting plate and the thrust piece. This results in high lubricant consumption, since areas of the raw material that are not in the active zone or do not enter the active zone are also covered with lubricant during the finish cutting process. Summary of the invention

[0011] Against this background, it is an object of the present invention to improve the lubricant supply to the action zone, in particular to save lubricant and to limit the distribution of lubricant on the workpiece.

[0012] According to the invention, this object is achieved in that, in a method of the type mentioned at the outset, lubricant is supplied to the active region via the cutting gap between the cutting plate and the thrust piece. Lubricant is thus supplied via the cutting gap parallel to or along the direction of movement of the thrust piece.

[0013] In a fineblanking press of the type mentioned, this object is achieved in that the fineblanking press comprises a device with which lubricant can be supplied to the action zone through the cutting gap between the cutting plate and the thrust piece.

[0014] Thus, according to the invention, it is achieved that lubricant is applied only at the locations where it is needed during the fine cutting, i.e. in the cutting gap and / or at the surface areas of the workpiece which gradually come into contact with the surface areas of the cutting plate which delimit the cutting gap during the relative movement. As a result, it is possible to effectively avoid the distribution of lubricant on other surface areas and to reduce the required amount of lubricant accordingly.

[0015] Preferably, the invention can provide here that the lubricant is supplied to the active region via grooves or grooves, preferably grooves or grooves extending at least partially in the direction of the relative movement, which grooves or grooves are arranged in the surface of the cutting plate facing the opposing surface of the thrust piece and / or in the surface of the thrust piece facing the opposing surface of the cutting plate. Thus, a channel can be formed which is defined by the grooves or grooves and the surfaces of the opposing elements.

[0016] Preferably, the opposing surfaces refer to surfaces between which a cutting gap is formed. Preferably, the grooves or / and slots constructed in the two surfaces may be arranged to be staggered with respect to each other.

[0017] It is particularly preferred that the groove or slot is not formed in the surface of the cutting plate, but only in the surface of the thrust piece which, viewed in the stroke direction, extends between the bottom surface and the top surface of the thrust piece and delimits the cutting gap on one side of the thrust piece. In this case, the groove is prevented from impairing the surface quality at the cut edge / face of the workpiece during the finish cutting.

[0018] Regardless of whether the grooves or the slots are arranged in the surface of the thrust piece or in the surface of the cutting plate, in a first preferred embodiment it is provided that the grooves / the slots in each case extend substantially over the entire length of the surface, viewed in the stroke direction.

[0019] In a second preferred embodiment, it is provided that the set of all grooves / grooves extending in the stroke direction is divided into at least two groups of grooves / grooves, wherein the grooves / grooves of a respective group each extend only over (especially different) partial areas of the entire surface length observed in the stroke direction.

[0020] Here, the grooves / grooves in two adjacent groups that follow each other in the stroke direction are connected by grooves / grooves extending circumferentially in the surface in the stroke direction. More preferably, the grooves / grooves extending in the stroke direction of different groups are staggered in the circumferential direction.

[0021] In the first or second embodiment, the invention preferably provides that the grooves / slots extending in the stroke direction, in particular the last group of grooves / slots in the stroke direction facing the workpiece, open into a circumferential groove / slot which is introduced into the surface in the circumferential direction in the stroke direction at the end of the surface facing the workpiece as viewed in the stroke direction and is open in the direction of the workpiece. The circumferential groove is thus located at the end of the cutting gap facing the workpiece and ensures that the lubricant can be distributed very easily along the cutting gap. Preferably, the invention provides that the lubricant is conveyed through the cutting gap, in particular in the direction of the raw material, by applying pressure to the lubricant, for which purpose a space region filled with lubricant and which can be loaded with pressure or is loaded during the cutting process is arranged in the fine blanking press, in particular in the lower part of the die comprising a cutting plate and a thrust piece movably supported in the cutting plate, into which space region the cutting gap opens, in particular the grooves / slots open, or which is connected to the active region via the cutting gap, in particular via the grooves / slots preferably extending therein.

[0022] During the relative movement of the units, pressure loading for conveying lubricant through the cutting gap can be achieved by a device that is suitable for temporarily increasing the pressure in this spatial region during the relative movement, in particular only during the time phase in which the thrust piece moves into the cutting plate, in particular away from the raw material.

[0023] Such a device can be formed, for example, by a pump which is operated in a clocked manner and which, during the entry movement, generates the pressure required to convey the lubricant through the cutting gap into the engagement region.

[0024] Particularly preferably, it is provided in the invention that at least part of the pressure required for the supply, or the required pressure is completely or at least predominantly generated by the movement of the thrust piece into a spatial region containing / conducting the lubricant, in particular into the aforementioned spatial region, which is arranged on the side of the thrust piece facing away from the raw material, in particular directly behind the thrust piece. The thrust piece can therefore preferably form a piston which can move in this spatial region and simultaneously change the volume of this spatial region.

[0025] For example, the lubricant in the spatial area may first be at a first pressure level, in particular, the first pressure level is not yet sufficient to transport the lubricant into the active area, wherein, by starting the movement of the push member, the push member moves in the direction of the spatial area, that is, in particular, moves in the direction of reducing the volume of the spatial area, and therefore, since the lubricant in the spatial area is compressed during the time period of the movement of the push member into the spatial area, the pressure of the lubricant increases, thereby increasing the pressure level, in particular, to a level that is sufficient to transport, in particular a sufficient amount of lubricant, through the cutting gap into the active area.

[0026] Preferably, provision is made that during and / or through the transfer of lubricant from the spatial region in the direction of a lubricant storage container, a pressure is generated against the effect of a line resistance in at least one line formed between the lubricant storage container and the spatial region, wherein lubricant is supplied to the spatial region from the lubricant storage container.

[0027] Although the pressure increase caused by the compression of the lubricant therefore does not inhibit the movement of the push piece, it only has the effect of increasing the pressure, because the possibility of further movement of the push piece is retained by the transfer of lubricant in the direction of the lubricant reservoir.

[0028] For example, the lubricant supply to the spatial region can be achieved by means of a pump or also by the lubricant storage container being designed as a pressure accumulator, the pressure loading of which supplies the lubricant to the spatial region.

[0029] Due to the pressing of the lubricant in the direction of the lubricant reservoir, it is conceivable that, in a typical design, the volume of lubricant pressed in the spatial region by the movement of the thrust element is greater than the volume required in the action zone.

[0030] Therefore, by moving the push piece in the direction of entering the spatial area, that is, in particular, moving in the direction of reducing the volume of the spatial area, a part of the squeezed lubricant volume, in particular the main part, is squeezed in the direction of the lubricant storage container, and another part of the lubricant, in particular a smaller part, is squeezed into the action area.

[0031] Preferably, the invention can provide that the lubricant is transferred from the spatial region in the direction of the lubricant reservoir by means of at least one throttle valve, in particular the magnitude of the pressure generated can be adjusted by means of the throttle valve. Preferably, such a throttle valve is arranged in at least one line extending between the lubricant reservoir and the installation space and connecting the two.

[0032] Preferably, the invention can provide that the throttle valve is active only when lubricant is pressed from the spatial region in the direction of the lubricant storage container, i.e., for the purpose of building up the required pressure, and preferably only then is flowed through, but preferably the throttle valve is inactive, in particular bypassed, when lubricant is conveyed from the lubricant storage container in the direction of the spatial region. For this purpose, for example, a combination of a throttle valve and a non-return valve connected in parallel can be used.

[0033] Preferably, the invention provides that the lubricant is conducted in a circuit between the lubricant storage container and the spatial region by means of at least one pump.

[0034] In such an embodiment, provision can preferably be made for the lubricant to be conducted through the cutting plate by means of at least one line, in particular by means of a supply line and a return line of a circuit.

[0035] The device for conveying lubricant via the cutting gap to the active area is preferably at least partially constructed in the lower mold part, which includes the cutting plate and the push piece and a spatial area filled or at least fillable with lubricant, into which the push piece is displaced, in particular this spatial area is connected in a circulation manner to the lubricant storage container.

[0036] Furthermore, the invention can preferably provide that, when the thrust piece moves into the spatial region, lubricant is transferred into the lubricant storage container via a throttle valve in a return line between the spatial region and the lubricant storage container, wherein a non-return valve arranged in the supply line is closed by the pressure or flow generated in the lubricant by the thrust piece.

[0037] This ensures that when the thrust piece moves into the space, the lubricant is not pressed back in the direction of the pump by the full line cross section, but rather the lubricant flows at least also or exclusively through the throttle in the return line.

[0038] It can also be provided that, when the thrust element is moved into the space region, lubricant is also transferred into the lubricant storage container via a throttle valve in the supply line between the space region and the pump, which throttle valve is connected in parallel with the closed nonreturn valve in the supply line.

[0039] As a result, while generating the required pressure, a return flow of lubricant to the lubricant storage container can also be generated in the supply line, but the lubricant can flow into the spatial area through the open non-return valve while bypassing the throttle valve in the supply line, for example, this can be achieved by a pump or in the return stroke of the push piece out of the spatial area.

[0040] During the return stroke of the thrust member away from the spatial area to the initial position (in particular, this causes the volume of the spatial area to increase), lubricant can flow from the lubricant storage container into the spatial area through at least one open non-return valve, in particular, wherein the return stroke is achieved by a pressure pin acting on the thrust member and passing through the spatial area.

[0041] Thus, the return stroke can be performed as is usually the case in fine blanking presses. It can also be provided that the return stroke is completed or at least assisted by a pressurized lubricant.

[0042] In a preferred development, provision can be made to reduce the wear of the punch also on the punch side, in particular in the punch region which contacts the remainder of the raw material during the stroke.

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

[0044] It is also preferred that lubricant is applied to the gap between the punch and the punch guide plate, in particular only by gravity acting on the lubricant, which is stored in a lubricant reservoir which surrounds the punch part protruding from the punch guide plate, in particular on the side of the punch guide plate facing away from the raw material / cutting plate. Preferably, the reservoir is open to the atmosphere, in particular so that no driving pressure potential acts on the lubricant.

[0045] Preferably, the lubricant reservoir is arranged around the punch in a frame-like / annular manner, wherein the outer surface of the punch facing radially outward forms a reservoir wall that can move with the stroke, thereby bringing the lubricant into the gap in addition to the effect of gravity. The lubricant thus passes through the gap to the radial outer surface of the punch close to the axial end face of the punch, with which the raw material comes into contact and acts to reduce friction there.

[0046] The invention can then provide that the lubricant is replenished into the storage container, for example, as a function of consumption or continuously. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Embodiments of the present invention are explained with reference to the following drawings. DETAILED DESCRIPTION

[0048] Here, Figure 1 The fine blanking press and its die are shown in an initial position in which the raw material 3 is already clamped between the unit consisting of the punch guide plate 5 and the cutting plate 6 and between the unit consisting of the punch 4 and the push piece 7, but no relative movement has yet taken place between these corresponding elements 5 / 6 and 4 / 7 for cutting purposes, in particular for separating the workpiece 3a from the raw material 3 or deforming the workpiece 3a.

[0049] Figure 2 The arrangement is shown after relative movement of the units.

[0050] In the figure, a partial area of ​​the fine blanking press that is important for the invention can be seen, but the drive unit is not shown. In this case, the figure shows a tool 1, 2, which is divided into a tool upper part 1 and a tool lower part 2.

[0051] In this case, a strip-shaped raw material 3 , for example a steel strip, is guided between the two tool parts 1 , 2 , from which workpieces 3 a are punched out.

[0052] For the cutting process, on the one hand, the raw material 3 is clamped in a generally known manner in a fine blanking press between a punch guide plate 5 and a cutting plate 6. For example, these two elements clamp regions of the raw material that remain in the raw material during the cutting process. On the other hand, the raw material is clamped between the punch 4 and the ejector 7. The regions clamped by the elements 4, 7 are, for example, regions that are separated from the raw material 3 during the cutting process or regions that are displaced relative to the raw material and form the workpiece 3a.

[0053] The cutting process itself is produced by moving the unit consisting of the punch 4 and the pusher 7 relative to the unit consisting of the punch guide plate 5 and the cutting plate 6 according to Figure 2 , in this embodiment, it is moved downwards, wherein this movement takes place in a clamped state of all units.

[0054] The workpiece 3a is moved out of the plane of the raw material 3 along the cutting gap 6a formed between the cutting plate 6 and the push member 7 which can move downward in the cutting plate, and if the movement of the push member 7 is longer than the thickness of the raw material 3, the workpiece 3a is separated from the raw material, otherwise the workpiece is only deformed.

[0055] Here, the invention provides that, in this embodiment, a space region 13a filled with lubricant 13 is provided below the thrust piece 7. When the clamped unit consisting of punch 4 and thrust piece 7 moves away from the plane of the raw material 3, the thrust piece 7 moves into this space region 13a and compresses the lubricant 13 there, so that by the pressure increase caused thereby, the lubricant 13 is at least partially pressed into the action zone 18 through the cutting gap 6a in opposition to the current movement of the thrust piece 7. In this way, it is possible to achieve a precise application of the lubricant 13 in the action zone 18, since the action zone 18 is actually formed by the upper end of the cutting gap 6a, in particular on the side of the cutting plate 6, and / or by the surface of the cutting plate facing the cutting gap. During the displacement, the workpiece 3a gradually comes into contact with this region of the cutting plate 6.

[0056] The discharge of the lubricant 13 from the spatial region 13a through the cutting gap 6a can be simplified by forming a channel in the cutting gap 6a, through which the lubricant 13 can be supplied by pressure. Preferably, such a channel is formed by grooves and / or grooves in the surface of the thrust piece 7 facing the cutting gap 6a, i.e., in particular parallel to the direction of movement. Thus, such grooves and / or grooves also open into the spatial region 13a.

[0057] The embodiment shown here provides that the lubricant 13 is pumped from the lubricant reservoir 17 into the space region 13a by means of the pump 16 via the supply line 14 and that the lubricant is pumped from this space region back into the lubricant reservoir 17 via the return line 15. This creates a lubricant circuit, in particular in which the pumping of the lubricant 13 in this circuit is independent of the stroke movement of the fine blanking press.

[0058] Thus, when the push member 7 moves into the space area 13, the lubricant 13 can also be squeezed back from the space area 13a into the lubricant storage container 17 by the movement of the push member 7. In addition, when moving back out of the space area 13a, the lubricant 13 can be drawn out of the lubricant storage container 17, especially in which the filling of the space area 13a with the lubricant 13 is also assisted by the pump 16.

[0059] In order to achieve a sufficiently high pressure for pressing the lubricant 13 into the action zone 18 , provision is made for the lubricant 13 to be pressed from the space region 13 a in the direction of the lubricant reservoir 17 via preferably adjustable throttle valves 11 , 12 both in the supply line 14 and in the return line 15 .

[0060] In this case, a respective throttle valve is connected in parallel to a non-return valve, which closes during the stroke movement of the push piece 7 into the space region 13a and thereby ensures that the lubricant 13 can only flow through the throttle valves 11, 12. Conversely, during the return stroke of the push piece 7, i.e., out of the space region 13a (in particular for the purpose of unloading the workpiece 3a), the non-return valve opens and allows the lubricant to flow back into the space region 13a without being influenced by the throttle valves 11, 12. Therefore, the throttle valve is only effective during the downward stroke of the push piece 7, but does not throttle the lubricant 13 during the upward return stroke of the push piece 7.

[0061] Here, the return stroke can be realized in that a return stroke force is applied to the push piece 7 by means of a drive device (not shown) via the pressure bolt 8, which pushes the push piece 7 out of the space area 13a. As a result, the volume of the space area 13a increases again and the lubricant 13 is sucked into the space area, which is assisted in particular by the action of the pump 16.

[0062] Here, the spatial region 13a is limited upward by the bottom surface of the thrust piece 7, laterally by the wall of the cutting plate 6 which delimits the cutting gap 6a on one side of the cutting plate, and downward by a plate arranged in the mold lower part 2, through which the pressure bolt 8 is guided, in particular in a sealed manner by means of a seal 10.

[0063] In order to prevent the lubricant 13 from getting between the cutting plate 6 and the plate due to a pressure buildup, the cutting plate 6 can be sealed relative to the plate by a seal 9 , in particular on the underside.

[0064] Here, the device for supplying lubricant 13 to the fine stamping press in the action area 18 through the cutting gap 6a is constructed partially in the lower part of the mold 2, i.e., by a pipeline area and a spatial area 13 in the cutting plate 6, and partially outside the lower part of the mold by a pump and a lubricant storage container 17 and possibly a throttle valve 11 and a check valve.

[0065] Compared to the prior art, the invention has the effect that with each stroke of the thrust piece 7 that causes cutting (here downwards), the lubricant 13 is applied only to the active area 18, ie precisely to the area where the lubricant is needed. Over-application can thus be avoided.

[0066] Figure 3 Another embodiment of the present invention is shown (again as Figure 2 After the relative movement of the units), these units include Figure 1 and 2 All of the features described above exist, but in an improved manner therein provision is made for the punch 4 to also be supplied with lubricant.

[0067] To achieve this, a lubricant storage container 21 is arranged above the punch guide plate 5, and in particular also above the punch guide pressure plate 19 located on the punch guide plate 5, which lubricant storage container surrounds the punch 4 in a frame-like and / or annular manner, in particular, surrounds the punch part protruding upward from the punch guide plate 5 / punch guide pressure plate 19, in particular surrounds the punch 4 radially outwardly.

[0068] The radially outwardly facing wall of the punch 4 is thus a movable wall region which delimits the reservoir 21 radially inwardly and is thus wetted by the lubricant 13. The reservoir 21 can be delimited radially outwardly by a limiting ring 20. Alternatively, the reservoir can also be arranged as an annular / frame-shaped recess at the top in the punch guide plate 5 or the punch guide platen 20.

[0069] Preferably, the storage container 21 is open to the atmosphere, so that the lubricant 13 is preferably guided into the gap 5a between the punch 4 and the punch guide plate 5 only by gravity and / or by the movement of the punch 4 itself, in particular guided downwards through the gap 5a to the surface of the raw material. Thus, the lubricant 13 can reach the area where the punch 4 is in contact with the remaining part of the raw material 3 and reduce the friction and wear of the punch 4 there.

[0070] Figure 4An embodiment is shown in which grooves / grooves 7a, 7b, 7c are formed in the surface of the push member 7 for supplying lubricant 13 from the spatial area 13a to the active area through the grooves / grooves. In this embodiment, it can be seen that the collection of all grooves / grooves includes a plurality of groups G1, G2, G3, wherein in each group G1, G2, G3, the grooves / grooves extend in the stroke direction or the direction of relative movement. In each group, the grooves / grooves 7a extend over a partial area of ​​the entire length of the push member observed in the stroke direction. The grooves 7a of adjacent groups are connected by grooves / grooves 7b extending in the circumferential direction, respectively. The grooves / grooves 7a of the last group G3 facing the workpiece 3a pass into the grooves / grooves 7c arranged at the end of the push member 7 facing the workpiece or raw material in the axial direction and open in the direction of the workpiece or raw material. Therefore, the lubricant transported by the grooves / grooves 7a, 7b, 7c can be distributed on the surface of the raw material along the cutting gap.

Claims

1. A method for fine-cutting a workpiece (3a) from a raw material (3) in a fine-blanking press, wherein: A raw material (3) is clamped between a punch guide plate (5) and a cutting plate (6) and also between a punch (4) guided in the punch guide plate (5) and a push piece (7) guided in the cutting plate (6), and a unit consisting of the punch (4) and the push piece (7) is moved relative to a unit consisting of the punch guide plate (5) and the cutting plate (6), whereby a workpiece (3a) is displaced relative to the raw material (3) along a cutting gap (6a) formed between the cutting plate (6) and the push piece (7), in particular separated from the raw material (3), wherein a lubricant (13) is applied in an action zone (18) between the cutting plate (6) and the workpiece (3a), wherein the lubricant (13) is applied to the workpiece (3a) The invention relates to a fine blanking press machine, wherein a lubricant (13) is supplied to an action zone (18) via a cutting gap (6a) between a cutting plate (6) and a push piece (7) movably supported in the cutting plate in a mold lower part (2), and a space region (13a) filled with lubricant (13) and capable of being loaded with pressure and pressurized during the cutting process is arranged on the side of the push piece (7) facing away from the raw material (3), and the space region is connected to the action zone (18) via the cutting gap (6a), wherein at least a part of the pressure required for the supply is generated by the movement of the push piece (7) into the space region (13a) for guiding the lubricant (13).

2. The method according to claim 1, characterized in that The lubricant (13) is supplied via grooves or slots (7a) extending at least partially in the direction of relative movement, the grooves or slots being arranged in the surface of the cutting plate (6) facing the opposite surface of the push piece (7) and / or in the surface of the push piece (7) facing the opposite surface of the cutting plate (6).

3. The method according to claim 2, characterized in that The grooves are formed only in that surface of the thrust piece (7) which, viewed in the stroke direction, extends between the bottom surface and the top surface of the thrust piece and delimits the cutting gap on one side of the thrust piece.

4. The method according to claim 2 or 3, characterized in that: The collection of all grooves / slots extending in the stroke direction is divided into at least two groups of grooves / slots, wherein the grooves / slots of a respective group extend only over different partial areas of the entire surface length observed in the stroke direction, wherein the grooves / slots in two adjacent groups that follow one another in the stroke direction are respectively connected by circumferential grooves / slots extending in the surface in the circumferential direction around the stroke direction, and in particular wherein the grooves / slots of different groups extending in the stroke direction are offset from one another in the circumferential direction.

5. The method according to any one of the preceding claims, characterized in that During and / or by the movement of the lubricant (13) from the spatial region (13a) in the direction of the lubricant storage container (17), pressure is generated against the effect of line resistance in at least one line (14, 15) formed between the lubricant storage container (17) and the spatial region (13a), wherein the lubricant (13) is supplied to the spatial region (13a) from the lubricant storage container (17).

6. The method according to claim 5, characterized in that The lubricant (13) is transferred from the space region (13a) to the lubricant storage container (17) by means of at least one throttle valve (11, 12), in particular the magnitude of the pressure generated being adjustable by means of the throttle valve.

7. The method according to any one of claims 5 or 6, characterized in that The lubricant (13) is conducted in a circuit between a lubricant storage container (17) and a space region (13a) by means of at least one pump (16).

8. The method according to any one of the preceding claims, characterized in that The lubricant (13) is conducted through the cutting plate (6) by means of at least one line (14, 15), in particular by means of a supply line (14) and a return line (15) of a circuit.

9. The method according to claim 7 or 8, characterized in that: When the push piece moves into the space region (13a), the lubricant (13) is transferred to the lubricant storage container (17) via a throttle valve (12) in a return line (15) between the space region (13a) and the lubricant storage container (17), wherein the non-return valve arranged in the supply line (14) is closed by the pressure generated in the lubricant (13) by the push piece (7).

10. The method according to any one of the preceding claims 7 to 9, characterized in that When the thrust piece moves into the space region (13a), the lubricant (13) is also transferred into the lubricant storage container (17) via a throttle valve (11) in the supply line (14) between the space region (13a) and the pump (16), the throttle valve being connected in parallel with a closed non-return valve in the supply line (14).

11. The method according to any one of the preceding claims 7 to 10, characterized in that During the return stroke of the push piece (7) away from the spatial region (13a) to the initial position, lubricant (13) flows from the lubricant storage container (17) into the spatial region (13a) via at least one open non-return valve, wherein the return stroke is achieved by a pressure pin (8) acting on the push piece (7) and passing through the spatial region (13a).

12. The method according to any one of the preceding claims, characterized in that A lubricant (13) is applied to the gap (5a) between the punch (4) and the punch guide plate (5), in particular the lubricant is applied only by the force of gravity acting on the lubricant (13), the lubricant being stored in a lubricant storage container (21), which in particular surrounds the part of the punch (4) protruding from the punch guide plate (5) on the side of the punch guide plate (5) facing away from the raw material (3) / cutting plate (6), and the lubricant storage container is in particular open to the atmospheric environment.

13. A fine stamping press for fine-cutting a workpiece (3a) from a raw material (3), wherein the raw material (3) can be clamped between a punch guide plate (5) and a cutting plate (6) and also between a punch (4) guided in the punch guide plate (5) and a push piece (7) guided in the cutting plate (6), wherein the unit consisting of the punch (4) and the push piece (7) can be moved relative to the unit consisting of the punch guide plate (5) and the cutting plate (6), thereby enabling the workpiece (3a) to be displaced relative to the raw material (3) along a cutting gap (6a) formed between the cutting plate (6) and the push piece (7), in particular enabling the workpiece to be separated from the raw material (3), wherein: A lubricant (13) can be applied in an action zone (18) between a cutting plate (6) and a workpiece (3a), the fine stamping press comprising a device by means of which the lubricant (13) can be delivered to the action zone (18) via a cutting gap (6a) between the cutting plate (6) and a push piece (7) by applying pressure to the lubricant (13), characterised in that a spatial area (13a) filled with lubricant (13) and capable of being pressure-loaded and pressurised during the cutting process is arranged on the side of the push piece (7) remote from the raw material, the spatial area being connected to the action zone (18) via the cutting gap (6a), wherein at least a part of the pressure required for the supply can be generated by the movement of the push piece (7) into the spatial area (13a) for guiding the lubricant (13).

14. The fine blanking press according to claim 13, characterized in that: The fine blanking press comprises a device by means of which a lubricant (13) can be introduced into a gap (5a) between a punch guide plate (5) and a punch (4), in particular the lubricant (13) can be introduced through the gap (5a) in the direction of a raw material (3).

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