DE102010044688A1 - Metal or ceramic powder electric press and control method therefor - Google Patents

Abstract

The invention relates to a metal or ceramic powder electric press or press tool of such a press with a punch device (16) which is designed to be pressable to press a powder and / or granulate in a die (13) by means of at least one punch, with at least one spindle device (20), comprising a spindle (21) and a spindle wheel (23), the spindle device (20) adjusting the stamp device (16) in or against a pressing direction, depending on the drive direction, with at least one spindle drive (22), which drives the spindle (21) or the spindle wheel (23), and with a control device (C) which, after programming control parameters as a stroke, a first stroke or test stroke with a movement sequence which can be interrupted before the end of the first stroke or test stroke Spindle device and the stamp device performs. A manually operable control component (24, 26), which is designed or programmed in connection with the control device (C), is advantageous in that, when the control component is operated manually, the stroke can be controlled at least in sections continuously or step by step.

Description

The invention relates to a metal or ceramic powder electric press with the preamble features of claim 1 and to a control method therefor.

To produce complex structured metallic or ceramic parts, such as gears, the use of presses for pressing a metallic and / or ceramic powdery material is well known, such as from DE 101 35 523 C2 , By means of a press drive, an upper-side and a lower-side punch device is displaced relative to a die opening of a die in order to press powder or granules introduced into the die opening into a pressed part by means of the punch device. In view of the very high pressing forces and the large amount of energy required for this, hydraulic or mechanical drives are used to drive such presses.

Genus unknown is known DE 36 25 420 A1 a device for producing ceramic molded parts, in which molding blocks are pressed in a molding box using an electric motor-driven screw press, which serve for example for the lining of furnaces. However, such ceramic materials and to be achieved pressing parts make completely different demands on structure and forces and power requirements on the presses as in the case of presses with which highly compressed and hard pressed parts, in particular tool components to be pressed from metallic or ceramic material.

Also well known by presentation on the occasion of "CERAMITEC 2009" in Munich, October 2009, a concept of such a metal or ceramic powder electric press with an electric drive, wherein for transmitting a pressing force as the main pressing force a spindle drive with a spindle wheel and spindle between an electric motor and a stamp device is connected. Thus, in a sequence of pressing cycles in each cycle, a pressing part is pressed with always the same part height. For this purpose, the spindle moves a traverse or upper punch device with a tool or pressing punch, which dips into a powder-filled die opening for pressing as a punch. The traverse follows according to a predetermined nominal path. Based on this, assemblies having two or more punches which are retracted into the die opening from above and / or below the die opening can be realized, wherein the individual punches are moved relative to one another at different speeds and / or stroke distances. The movement distances of the individual punches and these adjusting tool components are referred to as axes.

To prepare a machine control program for the press and the tool, in particular in hydraulic and mechanical presses, a number of graphic drawings corresponding to the number of axes is made in a first step in order to clarify the required sequence of movement of the individual punches relative to a base plane of the press or of the tool. In particular, the movement sequences are nominal paths of the punches or other components of individual axles over time. On the basis of these diagrams or drawings, in a subsequent step, a programming similar to a CNC programming, as well known from machine tool programming, is performed. After programming, a so-called probe stroke is performed as a first stroke or as a later pressing trial to determine if programming in the machine readable program code has been done correctly. In particular, due to effects such as a compression during compression, but also due to the complex movement patterns of the individual axes or stamp relative to each other, often show in this first stroke errors or inaccuracies in the programming and / or adjustment. Correspondingly, post-corrections are necessary in particular for programming and further trial strokes. Disadvantageously, this procedure sometimes requires an emergency stop in the first sample strokes. In particular, tool breakages can occur especially when an emergency stop does not occur in good time during trial strokes with inserted punches and powder filled into the die opening of such a tool.

EP 1 439 949 B1 In the field of hydraulic and mechanical presses, a method for adjusting a ceramic or metal powder press tool, in which a machine tool control method of a machine tool programming for parallel control of a plurality of controllable tool devices is established, is described in a flow chart for a press stroke based on a press cycle. Target or target values for tooling parameters are determined. Subsequently, the tool starts a probe hub to check the created control procedure. EP 1 439 949 B1 indicates to solve the problem that the sample stroke in terms of expected motion sequences with the thus completed control process in the form of a machine control program for the press and the tool is not performed in the tool, but on the basis of coded for the tool machine Control program is simulated as a simulated probe hub in advance in a computer device. Only when this step is satisfactory, the sample stroke is carried out with the tool in the press.

It is also generally known to run a control program in a hydraulic press so that in the sample hub firmly defined points are approached in the form of predetermined positions for individual axes to stop the movement sequence to the sample hub over only a single To perform sections of the movement sequence.

Even with such highly automated control programs for the tool, however, there still remains a residual risk of collision during the sample stroke.

The object of the invention is to provide a metal or ceramic powder electric press with at least one spindle and a control method therefor, which enable the setting or checking of adjusted control parameters in a secure manner. In particular, a first stroke or sample stroke should be able to be carried out as well as possible in a controllable manner.

This object is achieved by a metal or ceramic powder electric press or by a press tool of such a press with the features of claim 1 or by a control method having the features of claim 11. Advantageous embodiments are the subject of dependent claims.

Accordingly, a metal or ceramic powder electric press or a press tool of such a press is preferred with a stamping device for pressing a powder and / or granules in a die by means of at least one punch - in particular by means of a plurality in the axial direction relative to each other adjustable punch - to a pressing part is configured adjustable with at least one spindle device having a spindle and a spindle wheel, wherein the at least one spindle device, the punch device or relatively adjustable components of the punch device is adjustable depending on the drive direction in or against a pressing direction, with at least one spindle drive, which the spindle or the spindle wheel is arranged to be drivable, and with a control device which is designed or programmed, after programming control parameters as a hub, a first stroke or sample stroke with a front end perform the first stroke or sample stroke interruptible movement of the spindle device and the punch device, and with a manually operable control component, which is designed or programmed in conjunction with the control device to control the stroke at least partially stepless at manual actuation of the control component.

Under a stepless control is understood in particular that the motion sequence is dependent on the operation of the manually actuated control component continuously runs or stopped. In particular, the motion sequence is not just a start or a predefined stop point to a next predefined stop point.

The fact that the hub is steplessly controlled, at least in sections, means that it is not absolutely necessary to control the entire mobile movement path by means of manual operation. It is also possible, an automatic approach of one or more preprogrammed points by means of the control device, and then to drive from such a point a portion of the subsequent mobile movement path or this total by means of manual operation.

Such a manually operable control component can be designed in a simple manner for transmitting a pulse or other control signal to the control device.

The powder and / or granules consists at least predominantly of metal or ceramic material for pressing in particular tool components, such as gears, linkage components and the like. Household goods are thus pressed, z. B. cups and plates.

The stamp device can consist of a single stamp in the simplest way, which z. B. presses a flat plate or a cutting blade. The stamp device may, according to preferred embodiments, but also have a plurality of punches, which are arranged differently adjustable in a separate framework relative to each other to z. B. to press a gear with several pressing steps in the pressing direction.

According to one embodiment, a motor shaft of the spindle drive itself or a portion of the motor shaft forms the spindle. Alternatively, however, embodiments are possible in which the motor shaft z. B. is coupled by means of a front-side screw or by means of a transmission with a spindle or a spindle wheel to enable the spindle or the spindle wheel in a rotation.

Preferably, the control component and the control device are designed or programmed to continue the stroke step by step by manual actuation of the control component in each case by at least one step. The control device is accordingly configured and / or programmed in a simple manner, not to control the sequence of movements continuously after the program input, but in defined or definable steps. In the case of a digitalized control in particular, a stepless or quasi-continuous sequence is ultimately understandable as a stepwise sequence, since all controls are clocked at least in parts of the control device and thus performed in at least minimal processing steps. Resuming means a new initiation of movement regardless of the direction of movement.

Advantageously, the stroke can be continued at each step a predetermined or predetermined spatial offset amount of a spatial distance of one of the tool components. Alternatively or in combination, the stroke can be advantageously continued at each step a predetermined or predetermined time offset amount of a time expiration period. The stroke is thus defined depending on the embodiment of a spatial or particularly preferably a temporal measure.

In particular, a step size of the offset amount can be adjustable by means of a step size input device. This makes it possible, as required, to specify a larger or smaller step size of the offset amount by means of a corresponding one of the step size input device instead of an equidistant step size, so that small step sizes that are critical for uncritical motion paths can be set for critical movement distances of the tool components. As an input device, for example, a mechanical actuator or an electronic Tatstur, z. B. numeric keypad, serve the controller.

It is advantageous if the step size is adjustable between individual steps.

According to a simple embodiment, the manually operable control component is an electrical or electronic control element, in particular an electric pushbutton emitting an adjustment or control signal per pressure. Thus, a signal of the controller can be applied, which then a targeted control of the spindle drive to z. B. causes such a predefined step. During each actuation, the control device initiates a movement of the tool components, in particular a single such step. As a result, the tool components can be traversed step by step in temporal or spatial steps, depending on the specification of the offset manipulated variable.

According to another embodiment, the manually operable control component is a mechanical adjusting element, in particular a handwheel. Alternatively or in combination with such an electric or electronic control element, a pulse or a plurality of pulses or corresponding control signals can be output to the control device by means of a handwheel, the control device then advancing the adjustable components of the tool by a corresponding number of steps triggers or controls by means of the electric drive components.

It is particularly preferred if by means of a z. B. a direction switch enter direction signal reversing the adjustment of the tool components for at least the next step can be triggered. Compared to non-generic hydraulic presses, in which for a reverse gear consuming surfaces of hydraulic cylinder / piston arrangements are to be changed, where u. a. Valves are to be switched differently, in an electric drive by switching a drive direction of the electric drive motors or drive actuators, the adjustment of the tool components can be relatively easily switched to a backward movement and then to a new forward movement. The changeover to the renewed forward movement can, depending on the embodiment, be carried out automatically when the direction signal is not repeated repeatedly or preferably only after the direction signal has been entered again.

A step movement distance can in particular be predeterminable within the entire movement distance of the tool components, within which the movement takes place continuously, in particular stepwise.

It is preferred to use a control method which is carried out in a particularly metal or ceramic powder electric press or in a press tool of such a press with a stamping device, wherein the metal or ceramic powder electric press or the press tool is adjustably designed for pressing a powder and / or or granules in a die by means of at least one punch - in particular by means of a plurality in the axial direction relative to each other adjustable punch - to a pressing part with at least one spindle device having a spindle and a spindle wheel, wherein the at least one spindle device, the punch device or relatively adjustable components the stamp device depending on Drive direction is designed to be adjustable in or against a pressing direction, with at least one spindle drive, which is arranged drivable the spindle or the spindle wheel, and with a control device that is designed or programmed, after programming control parameters as a hub stroke or sample stroke with to perform an interruptible before the end of the first stroke or sample stroke movement of the spindle device and the stamp device, wherein at least in sections steplessly controlled and adjusted by means of a manually operable control component in conjunction with the control device by a manual actuation of the control component of the stroke.

Thus, in particular, the pressing of metallic and / or ceramic pressed parts, in particular tool components, out of the field of tool construction by means of a press, whose main press drive is electrically operated, is made possible, wherein pressing forces not only in force ranges of 50-1500 kN, but in particular also of 10,000 kN, 15,000 kN, 20,000 kN or more can be achieved with high stroke rates at the same time.

Such an arrangement can be used in conjunction with a single main press drive in order to carry out the pressing by means of the spindle drive as a single press drive associated with the respective punches. However, such an arrangement can also be used within a press arrangement driven by an upper or lower side main press drive for adjusting the individual punches relative to one another. Ultimately, a combination of these two concepts can be implemented.

An embodiment will be explained in more detail with reference to the drawing. Show it:

1 schematically various components of a metal or ceramic powder electric press with a spindle drivable for pressing and with a control device and various manually operable control components and a flow chart and

2 Steps of a preferred spreader method for such a press or tool.

How out 1 As can be seen, there is an exemplary press 1 , which is constructed as a metal or ceramic powder electric press, essentially from known per se components. A press base 10 supports via guide rods 11 an upper press structure from. On the guide rods 11 is depending on the design of a die 13 either firmly attached or along the guide rods 11 slidably mounted. The matrix 13 has a central die opening 14 on, in which to the pressing part to be pressed powder or granules is filled. That from a powder container 17 supplied powder is in the die opening 14 by stamp 15 . 15 * can be pressed, which from above or below in the die opening 14 protrude. The or the top of the die opening 14 protruding stamp 15 . 15 * are on an upper stamping device 16 attached or part of an upper punch device 16 , The upper punch device 16 is by means of an upper-side press drive in and against a pressing direction down or up is adjustable. The upper-side press drive is a spindle device 20 educated. The one or the lower stamp 15 * are attached to a lower punch device or part of a lower punch device, which below the die opening 14 is arranged.

Depending on the configuration, the upper punch device 16 and the lower punch device may be arranged directly in the press frame or press assembly, or be arranged in an adapter insertable in the press frame, as is known per se.

For adjusting the upper punch device 16 and for applying the pressing force of the electric motor driven spindle drive is used 22 , The spindle drive 22 is part of a spindle device and is designed via at least one spindle 21 and at least one spindle wheel 23 the spindle device 20 the components of the upper punch device 16 in or against the direction of the die opening 14 to drive and to adjust.

The spindle drive 22 is stable with a carrier 12 trained upper press frame, the guide rods 11 or any other to the environment of the press 1 position-fixed component arranged stationary. The spindle drive 22 can thus the spindle wheel 23 put in a rotation ω and above that in or on the spindle wheel 23 sitting spindle 21 in a rotationally fixed, lateral, axial movement. The components of the upper punch device 16 be by means of the seated spindle 21 in or against the direction of the die opening 14 adjusted. Alternatively, such a spindle drive 22 also set a spindle in rotation, in which case the spindle axially offset the spindle wheel rotation and then wherein the spindle wheel is attached to the stamping device.

The press base 10 itself or arranged in this frame elements are with the guide rods 11 firmly attached to these and the carrier attached to it 12 to form a closed frame.

A control device C serves to the press drive 20 so that the adjustable components of the press 1 be controlled and adjusted by appropriate amounts and at appropriate times. The control device C is programmed for this purpose by means of a machine-readable program, which controls individual drives. To the exemplary spindle drive 20 The controller C applies a spindle drive control signal sp to drive it to rotate in one of its two directions of rotation.

In the in 1 illustrated flow diagram are plotted movement distances x over time t. A start time t ₀ corresponds to a ground state, in which the stamp 15 . 15 * from the die opening 14 are pulled out to the die opening 14 with the powder from the powder container 17 to fill. After filling the die opening 14 become the stamps 15 . 15 * longitudinally assigned trajectories x15, x15 * of the stamp 15 . 15 * with the help of the spindle drive 22 adjusted. In particular, an upper of the stamp 15 during a first phase of the pressing process downwards and finally back up again, while a lower one of the punches 15 * is moved back to its original position during the pressing process first upwards and later down. Illustrated is also an example of another movement path, which, for example, a movement of a center pin, the die 13 in the case of an adjustable die or other components.

It can be seen that the individual components, which can be adjusted relative to one another, are changed with regard to their state of motion, in particular at certain predefined times. For example, the upper one is the stamp 15 stationary for a relatively long time before being moved down at a relatively high speed of movement. At a first exemplary time t _n after the start time t ₀ , the stamp occurs 15 with the in the die opening 14 in contact powder and begins to press this. From this point in time t _n , the movement speed of the upper punch becomes 15 reduced until finally a final pressing force is reached and no further adjustment of the upper punch 15 he follows.

In particular, during this phase of the pressing process is advantageous that the control device C is able to control, for example, a sample stroke or first stroke after programming not only fixed predefined points for a stop of the movement sequence. In the illustrated embodiment of the control device C, the spindle drive control signal sp up to the first time t _n after the start time t ₀ to the spindle drive 22 created. Upon reaching this first time t _n is thus the further movement of the spindle drive 22 and thus the further adjustment of the upper of the stamp 15 or in particular all adjustable components stopped. The subsequent sequence of movements is only conditionally driven by the control device C. Instead of up to a previously preprogrammed further intermediate point or an end time t _{end of} the further movement of the relatively adjustable components by means of the spindle drive 22 continuously or stepwise due to a manual operation performed by an operator.

The press 1 has in addition to the control device C and usually for their operation existing display and input elements on additional input elements or control components. Such control components can be designed in a variety of ways in the form of mechanically operable buttons, inductive input components or, for example, currently emerging touch-sensitive display devices and give control signals ss to the control device C. As such a control component is for example a button 24 shown, which serves to input a control signal ss, which causes the control device C, the spindle drive control signal sp only for a single movement of the spindle drive 22 to the spindle drive 22 to apply. In the case of, for example, designed as a stepper motor spindle drive 22 would the particular upper punch 15 thus adjusted only by a movement step or a corresponding offset amount .DELTA. By pressing the button again 24 would the stamp 15 adjusted by a further offset amount Δ. Depending on the configuration, the offset amount Δ can be defined as a spatial offset amount Δh or preferably as a temporal offset amount Δt.

The continuously variable or stepwise progression of the movement is preferably continued _i only up to a time-window end point t, at which time a particularly critical phase of the sample-stroke is completed. Thereafter, the control device C takes over the further control of the movement sequence and moves the relatively adjustable components either continuously up to the press end position or an end point of the movement, where appropriate, also provided further interruptions of the movement at predefined points or for more manually moving paths could be.

Next to the button 24 or instead of the button 24 for manual control of the spindle drive 22 also control components for a stepwise movement may from a time t _n to a respective subsequent time t _{n +} may advantageously be provided. ₁ For example, a directional button is shown 25 as a control component for inputting a direction signal indicative of the direction of movement of the spindle drive 22 or the components driven by it adjusted. This makes it possible to manually also control a backward movement within the movement sequence, so that, for example, upon reaching a critical state, a return adjustment of the individual components can be made. This is advantageous in particular when using an electromotive spindle drive 22 possible, since in contrast to an adjustment with, for example, hydraulic cylinders, an always defined physical state of the press and all components is maintained even in backward steps.

Another advantage is the use of a handwheel 26 as a rotatable switch as a control component. With such a handwheel 26 can with a rotation by a rotation angle Ω of the handwheel 26 in one direction, for example, a rotation ω of the spindle wheel 23 or be made at a different configuration of the spindle by a predefined amount. With a rotation of the handwheel 26 in the opposite direction, for example, at the same time a backward movement can be controlled, so that the handwheel not only allows a stepless or gradual movement of the pressing process during the sample stroke, but also a return or backward movement of the components along the predetermined pressing sequence.

The step size (t _n -t _{n + 1} ) is preferably the distance between two smallest possible controllable times t _n , t _{n + 1} , but can preferably be set to a larger time period, which can also be adjusted again during manual operation. A step size button is advantageous for this 27 as a further control component with which an amount of the offset amount Δ, that is, for example, an amount of the stroke distance or the temporal step size can be set.

2 shows by means of exemplary steps S1-S12 a control method for such a drive. In a first step S1, a control program for adjusting the individual components of the press, which can be adjusted relative to one another, is set in the usual manner 1 created. After completion of the control program S2 in the form of a by the controller C of the press 1 readable and implementable machine codes, a hub is started. In this case, in a third step S3, it is first checked whether it is a first stroke after the programming or, if appropriate, also a later to be performed sample stroke, in which a manual control is desired. If not, a final twelfth step S12 is advanced, and either a stop or a regular pressing operation is performed.

If a sample stroke is to be performed manually, in a fourth step S4 an input of data is made which may be necessary for the execution of the manual sample stroke. In addition to the possibility to control in principle the entire stroke distance or the entire pressing process manually, it is preferred if only particularly critical movement phases are controlled manually. Accordingly, the start time t ₀ , the offset amount, in particular, the time offset amount Δt, the first time t _{n are} inputted after the manual control start timing start point t ₀ and the end time t _end . Optionally, other times, in particular a time window end time t _i or a pause duration t _p can be entered. Then, the sample stroke starts until the time window in which the manual operation is to be performed is reached. From the first of these times t _n , the movement sequence is stopped until, in a fifth step S 5 of the method, a next step of the movement sequence or the activation of the next time offset amount after receipt of a first or further control signal ss from one of the control components 24 . 26 is obtained by the controller C. Optionally, it can also be provided that the control device C automatically moves to the next step after the predetermined pause duration t _{p has} elapsed, with clearly time-delayed movement steps.

In a preferred further sixth step S6 it is checked whether an emergency stop is required. If not, in an eighth step S8, the movement sequence is continued until either an end time t _end or the next time offset amount Δt to be controlled. If an emergency stop is to be performed, the movement is interrupted in a ninth step S9. In both cases, it is preferably checked in a tenth step S10 whether a correction input of control parameters for the control program is required. If so, for example, the first step S1 is advanced to correct the control program. Optionally, all relatively adjustable components are moved back to their original position. If a correction input is not required, it is checked in an eleventh step S11 whether the final point in time t _{end of} the press end position or of a press sequence has been reached. If not, the next step will be approached in step S5, and thus controlled from manual input to manual input through the process flow. When the end is reached, the pressing operation is stopped in the twelfth step S12.

Processes with fewer or more than the above-mentioned steps can also be implemented.

In principle, any combinations of the various embodiments, which are illustrated with reference to the embodiments are also feasible.

LIST OF REFERENCE NUMBERS

1

Press as metal or ceramic powder electric press

10

Press base

11

guide rods

12

upper press frame

13, 14

Die or die opening

15, 15 *

stamp

16

upper punch device

17

powder container

20

spindle device

21

spindle

22

spindle drive

23

spindle wheel

24

Button for control signal

25

Directional button as a directional signal button

26

Handwheel as a control component

27

Step size button as a step size button

C

control device

r

Direction of movement

sp

Spindle drive control signal

ss

Control signal from control components

S1-S12

Steps of the tax procedure

t, t0

Time or start time

ti

Time window endpoint

t _n, t _{n + 1}

Time points after t ₀

(t _n - t _{n + 1)}

step size

tend

End time of the press end position or a press process

tp

break time

x15, x15 *

Trajectories of stamp offset amount

Δh, Δt

Spatial or temporal offset amount

ω

Rotation of the spindle wheel

Ω

Angle of rotation of the handwheel

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10135523 C2 [0002]
• DE 3625420 A1 [0003]
• EP 1439949 B1 [0006, 0006]

Claims (11)

Metal or ceramic powder electric press or press tool of such a press with - a stamp device ( 16 ) for pressing a powder and / or granules in a die ( 13 ) by means of at least one punch - in particular by means of a plurality in the axial direction relative to each other adjustable punch - is designed to be adjustable to a pressing part, - at least one spindle device ( 20 ), which is a spindle ( 21 ) and a spindle wheel ( 23 ), wherein the at least one spindle device ( 20 ) the stamp device ( 16 ) or relative to each other adjustable components of the stamp device ( 16 ) is adjustable depending on the drive direction in or against a pressing direction, - at least one spindle drive ( 22 ), which the spindle ( 21 ) or the spindle wheel ( 23 ) is arranged drivable, and - a control device (C) which is designed or programmed, after programming control parameters as a hub stroke or a sample stroke with an interruptible before the end of the first stroke or sample stroke movement of the spindle device ( 20 ) and the stamp device ( 16 ), and - a manually operable control component ( 24 . 26 ) which is designed or programmed in conjunction with the control device (C), upon manual actuation of the control component ( 24 ) steer the hub steplessly at least in sections. Press according to Claim 1, in which the control component ( 24 . 26 ) and the control device (C) are designed or programmed, with manual actuation of the control component ( 24 . 26 ) to continue the stroke step by step by at least one step (S5). A press according to claim 2, wherein at each step the stroke continues a predetermined or predetermined spatial offset amount (Δh) of a spatial path of one of the tool components. A press as claimed in claim 2, wherein the stroke at each step continues a predetermined or predetermined time offset amount (Δt) of a time-lapse duration. Press according to claim 3 or 4, wherein a step size ((t _n -t _{n + 1} )) of the offset amount (Δh, Δt) is determined by means of a step size input device ( 27 ) is adjustable. A press according to claim 5, wherein the step size ((t _n -t _{n + 1} )) is also adjustable between individual ones of the steps. Press according to any preceding claim, wherein the manually operable control component ( 24 - 27 ) an electrical or electronic control element, in particular an electric pushbutton emitting an adjustment or control signal per pressure ( 24 . 25 . 27 ). Press according to any preceding claim, wherein the manually operable control component ( 26 ) a mechanical actuator, in particular a handwheel ( 26 ). Press according to any preceding claim, wherein by means of an input direction signal a reversal of the adjustment of the tool components for at least the next step is triggered. Press according to any preceding claim, wherein a step movement distance can be predetermined within the entire movement distance of the tool components, within which the movement takes place continuously, in particular stepwise. Control method carried out in a metal or ceramic powder electric press or in a press tool of such a press with a stamping device ( 16 ), in particular in a metal or ceramic powder electric press or in a press tool according to any preceding claim, adjustably adapted for pressing a powder and / or granules in a die ( 13 ) by means of at least one punch - in particular by means of a plurality in the axial direction relative to each other adjustable punch - to a pressing part with at least one spindle device ( 20 ), which is a spindle ( 21 ) and a spindle wheel ( 23 ), wherein the at least one spindle device ( 20 ) the stamp device ( 16 ) or relative to each other adjustable components of the stamp device ( 16 ) is adjustable depending on the drive direction in or against a pressing direction, with at least one spindle drive ( 22 ), which the spindle ( 21 ) or the spindle wheel ( 23 ) is arranged drivable, and with a control device (C), which is designed or programmed, after programming control parameters as a hub stroke or a sample stroke with an interruptible before the end of the first stroke or sample stroke movement of the spindle device ( 20 ) and the stamp device ( 16 ), - whereby by means of a manually operable control component ( 24 . 26 ) in connection with the control device (C) by a manual actuation of the control component ( 24 . 26 ) the hub is at least partially infinitely, in particular gradually controlled and adjusted.

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