WO2019120391A1

WO2019120391A1 - Method and device for increasing the useful pressing force of servo presses

Info

Publication number: WO2019120391A1
Application number: PCT/DE2018/200110
Authority: WO
Inventors: Uwe Darr
Original assignee: Schuler Pressen Gmbh
Priority date: 2017-12-19
Filing date: 2018-12-05
Publication date: 2019-06-27
Also published as: DE102017130425A1; DE102017130425B4

Abstract

The invention relates to a method for increasing the useful pressing force of servo presses and a device for carrying out (5) said method. The aim of the invention is to create, with little effort, a method and a device for producing shaped parts by means of a mechanically driven servo press which can be used as a single press, transfer press, lead press or downstream press of a (10) press line, wherein the sum of the peak forces which can be used for all adjacent die stations is greater than the total installed force of the press. For this purpose a drive (2), which is operatively connected by means of at least one servo motor (16) (15) and the first main function of which is to move the ram (3), interacts in a combinatorial manner with at least one compensating device (26) as (20) a second main function or a secondary function, said compensating device being assigned to a die station (4-7) of a preferably multi-station transfer die set or to one of a plurality of sub-stations of a double-blank station, said interaction meaning that the peak forces of one or more die stations (4-7) can, in a spatially and temporally off-set manner, be controlled in an open-loop and closed-loop so as to increase the usable total force with respect to the total installed force of the press.

Description

Method and device for Nutzpresskrafterhöhung on

Servopresses

description

The invention relates to a method for

Nutzpresskrafterhöhung to servo presses and a device for carrying out the method

In known technical solutions of presses in general and especially of mechanical servo presses for the production of pressed moldings, the machine-specific defined pressing force is used to design all integrated system components and is at the same time a limit that can not be exceeded by the user in the tool-specific load cases. As a rule, the tool-specific peak force occurs in the area of the lower reversal point of a

Eccentric drive equipped mechanical press on. In this position, the press by suitable

Protection devices protected against overload.

In multi-stage forming processes results in the

Tool-specific total pressing force from the sum of all individual pressing forces occurring in the individual tool stages. The resulting total pressing force must be under

Taking into account the permissible eccentricity within the limits of the maximum permissible machine pressing force. An increase in the useful pressing force is not possible here.

In known progressive presses can in the individual

Tool levels separately height adjustable adjustment elements are provided so that the station-specific peak forces are independently adjustable, this Setting is done as a static function during a basic setting process and usually remains unchanged during operation. The height adjustment

Optimized level-specific peak forces must be in the sum within the limits of the maximum permissible

Machine pressing force lie. An increase in the useful pressing force is, as mentioned above, not possible.

There are also presses with devices for dynamic

Immersion depth control known in which the plunger can be adjusted by means of height-adjustable adjusting device during operation so that there are constant reproducible conditions to achieve a defined effective pressing force when dynamic conditions, e.g. Change springing and heating of the press during operation.

With activation of this immersion depth control, the

Limits of the maximum permissible machine press force

be complied with, with an increase in the useful power is also disadvantageous not possible.

From DE 10 2016 106 286 Al is a method and a

Device for controlling and regulating the slide movement and the ram forces on multi-point servo-hybrid presses known.

DD 218 845 A1 discloses a method for the subsequent machining of forms from sheet metal.

In DE 1 246 652 A a transfer press with a plunger for receiving a plurality of tool upper parts is described.

From WO 2011/038921 Al a method for moving a processing unit of a machine, in particular a press, is known.

Task and advantage of the invention The invention is based on the object, with little effort, a method and an apparatus for the preparation of

Moldings by means of a mechanically driven, as

Single press, transfer press, head or follow press of a press line usable servo press to create at which the sum of usable for all adjacent tool levels

Peak forces is greater than the installed total force of the press.

According to the invention the object is achieved by a method for

Nutzpresskrafterhöhung to servo presses for the production of molded pressed parts with the features of claim 1 solved.

Further detailed embodiments of the method are described in the respective claims 2 to 13.

The method is carried out with a device having the features of claim 14. Detailed

Embodiments of the device are described in claims 15 and 16.

The core idea of the invention is that in one with high productivity with reduced energy consumption

featured mechanical servo press used

Main drive for the movement of the plunger as the main function with at least one of a tool stage of a

preferably multi-stage transfer tool set or one of several sub-stations of a double-station

associated balancing device as a second main function or secondary function is in combinatorial interaction that the peak forces of one or more

Tool steps off and time offset so controllable are to increase the total usable power compared to the installed total force of the press.

When acting as a secondary function or second main function compensating devices in the form of machine cushions they can be arranged in each case in the table or below the lower tool and / or in the plunger or above the upper tool of the press. In the form of tool cushions, these are each arranged in the upper and / or lower tool.

All balancing devices have in common that they are each hydraulically or servo-electrically driven and allow a variation of the wegmäßigen tool installation height. In combination and operative connection with the servo motor driven main drive for the plunger movement can

- By staggered start of the plunger of

at least one first and second reversal point in a common forming plane

or

- By temporally offset approach of the plunger from a separate lower reversal point in at least a first and second forming plane

the step-related peak forces are distributed in such a way that the sum of the usable step peak forces can be greater than the installed one

Total power of the press.

With the method and apparatus according to the invention, the known from the prior art substantially away and synchronous use of acting between adjacent tool levels peak forces to be repealed and at least one or more stages or one of several sub-stations of a double station wegside and temporally asynchronous to the further adjacent stages are operated so that the step peak forces do not add up, but take effect one after the other.

In a first embodiment of the method is the

Servomotor driven main drive for the

Plunger movement as the first main function with at least one, the respective tool level assigned

Compensation device in combinatorial interaction, that after the start of the first lower reversal point of the plunger with forming a first amount of pressed part in the associated tool stages, an intermediate return stroke of the plunger on the one hand ensures a force relief and

on the other hand, at least one first compensating device assigned to a respective tool stage is deactivated as a secondary function by height adjustment and at least one second compensating device assigned to a respective adjacent tool stage functions as a secondary function

Depth adjustment is activated and subsequently by

Starting the second lower reversal point of the plunger with forming a second amount of pressing in the associated tool stages on the common forming plane and return stroke in the upper reversal point of the plunger of the cycle is terminated.

In a second advantageous embodiment of the method and the device, the servomotor driven main drive for the plunger movement is the first main function with at least one of the respective tool stage

associated balancing device in combinatorial interaction, that after the start of the first lower reversal point of the plunger in the first forming plane with

Forming a first pressing amount in the associated Tool stages an intermediate return stroke of the plunger on the one hand provides a force relief and on the other hand, at least one associated with a respective tool level compensation device is deactivated as a secondary function by height adjustment and subsequently by moving to the second lower reversal point of the plunger in the second forming plane with forming a second amount of pressed part in the associated tool stages as well as return stroke in the upper reversal point of the plunger the cycle is terminated.

In a third advantageous embodiment of the method and the device, the servomotor driven main drive for the plunger movement is the first main function with at least one, the respective tool stage

associated balancing device in combinatorial interaction, that after starting the second lower reversal point of the plunger in the second forming plane with

Forming a first pressing amount in the associated

Tool stages an intermediate return stroke of the plunger on the one hand provides a force relief and on the other hand, at least one, a respective tool level associated with compensating device as a by-function

Depth adjustment is activated and subsequently by

Starting the first lower reversal point of the plunger in the first forming plane with forming a second amount of pressed part in the associated tool stages and return stroke in the upper reversal point of the plunger of the cycle is terminated.

In a fourth advantageous embodiment of the method and the device, the servomotor driven main drive for the plunger movement is the first main function with at least one, the respective tool stage

associated balancing device so in combinatorial interaction that after starting the first forming plane of the plunger with forming a first

Preset quantity in the assigned tool stages a

interim force relief of the plunger by

Deactivation of at least one, associated with a respective station compensation device as a secondary function by height adjustment and subsequently by approaching the second lower reversal point of the plunger in the second

Forming level with forming a second amount of pressed part in the assigned tool stages and return stroke in the upper

Reversal point of the ram the cycle is terminated.

In a fifth advantageous embodiment of the method and the device, the servomotor driven main drive for the plunger movement is the first main function with at least one, the respective tool stage

associated balancing device so in

combinatorial interaction that after moving to the first lower reversal point of the plunger in the second

Forming level with forming a first amount of pressed part in the associated tool stages an intermediate return stroke of the plunger on the one hand to relieve force and on the other hand by activating a depth adjustment of at least one, a respective tool level

Compensation device as a second main function for forming a second amount of pressed part in the associated

Tool steps in the first forming level takes place and with return stroke to the upper reversal point of the plunger the cycle is terminated.

In a sixth advantageous embodiment of the method and the device, the servomotor driven main drive is responsible for the plunger movement as the main function At least one, the respective tool level associated balancing device in combinatorial interaction that after the start of the first lower reversal point of the plunger with forming a first Pressteilmenge in the associated tool stages at an interim standstill of the plunger on the one hand deactivation of at least one, the respective tool stage associated first Compensation device for power relief by means of height adjustment as a secondary function and on the other hand a

Activation of at least one, one of each

adjacent tool stage associated second

Compensation device for power by means of

Depth adjustment as the second main function for forming a second amount of pressed part in the associated tool stages in a common forming level and ends with return stroke in the upper reversal point of the plunger of the cycle.

The invention will be explained in more detail by exemplary embodiments. The accompanying drawings show:

Fig. 1 Basic structure of a servo press with

Nutzpresskrafterhöhung

Fig. 2 block diagram of the control technology

device features

Fig. 3a, b step sequence of the method according to

first embodiment for type "double lower plunger movement reversal point" on common forming plane with

"Passive compensation _V orrichtung" Fig. 4a to

Graphical sequence of the procedure with the

Device features to

first embodiment for type "double lower ram movement reversal point on common forming plane" with

"Passive compensation _V orrichtung"

Fig. 5a, b step sequence of the method according to

second embodiment for type "double lower ram movement reversal point in the first and second forming plane" with

"Passive compensation _V orrichtung"

Fig. 6a to

Graphical sequence of the procedure with the

Device features for the second

Design for type "double

lower plunger movement reversal point in first and second forming plane "with

"Passive compensation _V orrichtung"

Fig. 7a, b step sequence of the method according to

third embodiment for type "double lower plunger movement reversal point" in the first and second forming plane with

"Passive compensation _V orrichtung"

Fig. 8a, b Graphical sequence of the method with the

Device features for the third

Design for type "double

lower plunger movement reversal point in first and second forming plane "with

"Passive compensation _V orrichtung"

Fig. 9a, b step sequence of the method according to

fourth embodiment for type "simpler lower ram motion reversal point "in second forming plane with" semi-active

_V compensation orrichtung "

Fig. 10a, b Graphical sequence of the method with the

Device features for the fourth

Design for type "simple lower plunger movement reversal point" in the second forming plane with "semi-active

_V compensation orrichtung "

Fig. 11a, b step sequence of the method according to

fifth embodiment for type "simple lower plunger movement reversal point" in the second forming plane with "active

_V compensation orrichtung "

Fig. 12a, b Graphical sequence of the method with the

Device features for the fifth

Design for type "simple lower plunger movement reversal point" in the second forming plane with "active

_V compensation orrichtung "

Fig. 13a, b step sequence of the method according to

sixth embodiment for type "simple lower plunger movement reversal point" on common forming plane with "active

_V compensation orrichtung "

Fig. 14a, b Graphical sequence of the method with the

Device features for the sixth

Design for type "simple lower ram movement reversal point" on common forming plane with "active _V compensation orrichtung "

Fig. 1 shows the schematic structure of a mechanical

Servo press with increased load force. In the press table 1, the drive 2 of the vertically movable plunger 3 for receiving the individual tool stages 4-7 is assigned

Upper tools 8.1-8.4 arranged. The drive 2 of the plunger 3 via the arranged in the figure right and left pressure point group 9,10 and 11,12, wherein in the

two-dimensional drawing only the pressure points 9, 11th

can be seen. The not visible in the figure

Pressure points 10, 12 are three-dimensionally in each case in the depth behind the pressure points 9, 11, so that the servo-press in this case consists of four pressure points 9-12, each operatively connected by means of a pull rod 13 with a connecting rod 15 belonging to an eccentric 14 are. In a first case, a central eccentric wheel 14 per side via two connecting rods 15.1, 15.2 and 15.3, 15.4 together with the pressure points 9 and 10 and 11 and 12 operatively connected, wherein the eccentric 14 is driven via an intermediate gear by a servo motor 16.1 and 16.2 , In a second case, each connecting rod 15.1, 15.2 and 15.3, 15.4 is associated with an eccentric 14.1, 14.2 and 14.3, 14.4, wherein the eccentric wheels 14 are driven jointly on each side via an intermediate gear by a servomotor 16.1, 16.2.

Alternatively to the arranged in the figures as a sub drive in the table 1 drive 2 is an application as an upper drive with a, not shown in the figures in the head piece

arranged drive possible. In all cases, the rotational movement generated by the servo motor 16 is converted by the eccentric 14 in a linear motion for driving the vertically movable plunger 3.

The pressure points 9 to 12 contain next to one

Adjusting gear 17 for adjusting the height adjustment of

Tappet 3 each have a hydraulic pressure pad 18 for

Overload protection of the ram 3.

The NC control device 19 generates the command variable signals 20 for the servomotors 16 with associated converter 21 for the main drive of the movement of the plunger 3.

The position of the plunger 3 is determined by means of arranged on the press table 1 first and second plunger position measurement

means 22.1, 22.2 detected, the measured variable signals 23 are processed in the NC controller 19.

The tooling 4-7 associated sub-tools 24.1- 24.4 are positioned together on the sliding table 25.

To the disadvantages of the prior art in terms of compliance with the sum of all occurring simultaneously in the individual tool levels 4-7 individual pressing forces within the

Limits of the maximum permissible machine press force too

avoid, is at least one of the individual tool levels 4-7 associated upper tool 8 and / or lower tool 24 with a balancing device 26 in operative connection.

In FIG. 2, the control-technical device characteristics of the NC control device 19 according to claim 14 are shown as a block diagram.

This contains the functional unit 34 for positioning control of the pressure points of the plunger 3 with provision of the

Command signal 20 for the inverter 21 for controlling the servomotors 16, on the one hand with the sequencer 27 and on the other hand with the functional unit 33 for calculation the movements for the pressure points 9-12 of the plunger 3 is linked.

In the functional unit 33 get the required

Signal quantities 35 for calculating the motion sequences for the pressure points of the plunger 3.

The further functional unit 32 for generating the path and force-dependent command variable signals 36 for the control of the compensating device 26 is on the one hand with the

Sequence control 27 and on the other hand with the functional unit 31 for calculating and / or detecting the off-center load with optimization linked. The optimization

considers the selection of one or more tool levels 4-7, in which by activating the assigned

Compensation device 26 in conjunction with an adapted sequence of movement of the plunger 3 on the one hand, the sum of the weg- and simultaneously acting peak forces of the tool stages 4-7 is reduced and on the other hand, the resulting

Peak force in the direction of travel 55 is shifted so that the installed machine limits are not exceeded despite increasing the Nutzpresskraft. Prerequisite for the optimization is provided by calculation and / or by means of input signals 30 metrologically

tool-specific incremental forces by means of the functional unit 29, with the functional units 27 for sequence control and 28 for storing the machine and tool data

is technically linked.

In Fig.3a, b, the sequence of steps of the method according to a first embodiment for type "double lower

Plunger movement reversal point "on common forming plane with" passive compensation device "shown.

In the first preparation phase 40, the machine-specific characteristics (press force, stiffness, eccentric Load capacity) stored in the functional unit 28. In the second preparation phase 41, the input, calculation, measurement or of the force curve detected by means of the learning stroke takes place in the tool stages 4 to 7.

In the third preparation phase 42, the resulting off-center force curve is subsequently determined by calculation, measurement or learning stroke.

A comparison of those determined in the preparation phase 41, 42

Values with those stored in the preparation phase 40

Characteristic values take place in the fourth preparation phase 43.

In the intermediate step 44, the alternative subsequent steps are defined, wherein in the case of falling below the allowable load capacity (values according to V2, V3 <VI), the press with

deactivated balancing devices 26 is started and in case of exceeding the allowable load capacity (values according to V2, V3> VI) in the fifth preparation phase 45, the corresponding tool level 4-7 is selected for Nutzpresskrafterhöhung.

In the subsequent sixth preparation phase 46, the resulting off-center force curve is calculated with optimization within the permissible characteristic values, measured or determined by means of a learning stroke.

In compliance with the allowable load capacity, the setting values for the selected tool level 4-7 are assigned in the seventh preparation phase 47

Compensating device 26 is determined and stored in the NC controller 19.

After the start signal 48 starts with the first

Method step 49 of the cyclic sequence in which the movement of the plunger 3 is started as a main function and at least one step-related first balancing device 26.2, 26.4 is activated as a secondary function that in this tool stage 5, 7 when starting the first lower reversal point 60 in the common forming plane 61 by Umformweg the associated first pressing member 62 is formed with step-peak force and takes place in the adjacent tool stages 4, 6 by free travel due to deactivated second compensating device 26.1, 26.3 no or only a partial deformation.

In the second method step 50, the movement of the plunger 3 in one of the first lower reversal point 60 takes place

upwards intermediate catch 63, while in the third

Step 51, the previously activated in the tool stages 5, 7 first balancing devices 26.2, 26.4 are deactivated by height adjustment and the previously deactivated in the tool stages 4, 6 second

Compensation devices 26.1, 26.3 are activated by depth adjustment.

In the fourth method step 52, when approaching the second lower reversal point 64 of the common forming plane 61 with the plunger 3 by Umformweg the associated second pressing member 66 in the tool stages 4, 6 at activated second

Compensating devices 26.1, 26.3 formed with step-peak force, wherein in the tool stages 5, 7 due

deactivated first balancing devices 26.2, 26.4 by free travel no deformation takes place.

In the fifth method step 53, the movement of the plunger 3 with the upper tools 8 in the direction of the upper reversal point 65 with the transport of the pressed parts 62, 66 along the tool stages 4-7 in the direction of passage 55.

In the subsequent sixth step 54 of the

Cycle of movement of the plunger 3 with deactivation of the second balancing devices 26.1, 26.3 and activation of the first balancing devices 26.2, 26.4 ended and the sequence of movements in the first method step 49 continues cyclically. The sequence of steps of the method steps of Fig. 3a, b is shown in Fig. 4a to c by a graphical flow with the

Device features visualized, the presentation is limited to a section of the tool room of FIG.

In step S1 of the first row are by

Decline of the plunger 3 in the first lower reversal point 60 of the common forming plane 61, the first pressing parts 62 in the tool stages 5, 7 transformed. With return stroke of the plunger 3 in an intermediate detent 63 in step S2 of the second row, the first compensating devices 26.2, 26.4 are deactivated by height adjustment in step S3 of the third row and the second balancing devices 26.1, 26.3 activated by depth adjustment. In method step S4 of the fourth row, the second pressing parts 66 are reshaped by the movement of the plunger 3 into the second lower reversal point 64 of the common forming plane 61, wherein in FIG

subsequent step S5 of the fifth row

simultaneously with the movement of the plunger 3 in the upper

Reversal point 65 of the transport, not shown, of the pressing parts 62, 66 from one tool level 4-7 to the next in

Passage direction 55 takes place.

Before the start of the subsequent cycle, the second balancing devices 26.1, 26.3 are deactivated in step S6 of the sixth row and the first balancing devices 26.2, 26.4 are activated.

In Fig.5a, b is the sequence of steps of the method according to a second embodiment for type "double lower

Plunger movement reversal point "in the first and second forming plane with" passive compensation device "shown.

The preparation phases 40 to 47 are analogous to the

previously described first embodiment of Figure 3a, b. After the start signal 48 starts with the first

Step 69 is the cyclic flow in which the movement the plunger 3 is started as a main function and the compensation device 26 is activated as a secondary function that in the associated tool stage 6 when starting the first lower reversal point 60 in the first forming plane 67 by Umformweg the associated pressing member 62 is formed with stepped peak power and in the adjacent

Tool stages (4, 5, 7) by no or only one empty path

Partial forming takes place.

In the second method step 70, the movement of the

Tappet 3 in one of the first lower turning point 60th

deviating, upward intermediate detent 63, while at the same time in the third method step 71, the previously activated in the tool stage 6 compensating device 26 is deactivated by height adjustment.

In the fourth method step 72, when starting the second lower reversal point 64 in the second forming plane 68 with the plunger 3 by Umformweg the associated pressing members 66 in the tool stages 4, 5, 7 with step-peak force

deformed, wherein in the tool stage 6 due to deactivated balancing device 26 takes place by free travel no deformation.

In the fifth method step 73, the plunger 3 moves with the upper tools 8 in the direction of the upper reversal point 65 with transport of the pressed parts along the tool stages 4-7 in the passage direction 55.

With activation of the balancing device 26 in the

Tool stage 6 is terminated in the sixth method step 74, the cycle of movement of the plunger 3 and the

Movement continued with the first step 69 cyclically.

The graphic sequence of the method steps for the sequencer according to FIG. 5a, b can be seen from FIGS. 6a to c.

The sequence is started with method step S1 of the first row, in which by decline of the plunger 3 in the first lower reversal point 60 of the first forming plane 67, the first pressing parts 62 in the tool stage 6 is transformed. During the return stroke of the plunger 3 in a

Intermediate catch 63 in method step S2 of the second row, the compensation device 26 is deactivated in step S3 of the third row by height adjustment.

In method step S4 of the fourth row, as a result of the movement of the plunger 3 into the second lower reversal point 64 of the second forming plane 68, the second pressed parts 66 become

reshaped. After the fifth step S5 of the plunger 3 shown in the subsequent fifth row has reached the upper reversal point 65, with the compensating device 26 activated in the sixth method step S6, the cycle can be continued with the method step S1 described above.

In Fig.7a, b, the sequence of steps of the method according to a third embodiment for type "double lower

In contrast to the second embodiment according to FIGS. 5a, b, the compensation device 26 is deactivated in the first method step 75 and after the startup of the first lower one

Inversion point 60 in the second forming plane 68 are formed by Umformweg the associated pressing parts 66 in the

Tool stages 4, 5, 7 formed with step-peak force, with no or only a partial deformation takes place in the adjacent tool stage 6 by free travel.

After previous start-up of the intermediate catch 63 in the second method step 70, in the third method step 76, the compensation device 26 is adjusted by depth adjustment

activated. Thereafter, the plunger 3 moves in the fourth

Step 77 in the second

lower reversal point 64 in the first forming plane 67, whereby the associated pressing member 62 in the tool stage 6 through Forming is transformed with step-peak force, wherein in the tool stages 4, 5, 7 by Leerweg no deformation takes place.

The associated graphical sequence of the method steps for the sequencer according to Fig.7a, b can be seen from the Fig.8a, b. In contrast to the second embodiment according to Fig.oa to c is in step S1 of the first row as a result of the deactivated balancer 26 no deformation instead, wherein in this position of the first lower

Turning point 60 in the second forming plane 68 through

Forming the associated pressing parts 66 in the

Tool stages 4, 5, 7 are transformed with step-peak force. In method step S3 of the third row, the compensating device 26 activated by depth adjustment is opposite to the representation in the preceding second

Step S2 in the second row can be seen. In the fourth row, in method step S4, by moving the plunger 3 into the second lower reversal point 64 in the first forming plane 67, the associated pressing part 62 in FIG

Tool stage 6 formed, wherein in the tool stages 4, 5,

7 by Leerweg no reshaping takes place.

In Fig. 9a, b, the sequence of steps of the method according to a fourth embodiment for Type Type "is simpler lower

Plunger movement reversal point "in second forming plane with" semi-active compensation device "shown.

With the movement of the plunger 3 when activated

Compensation device 26 in the first process step 79 in the first forming plane 67 is formed with Umformweg the associated pressing member 62 in the tool stage 6 with step-peak force, wherein in the adjacent tool stages 4, 5, 7 takes place by no or only a partial deformation. In this position, the compensating device 26 is deactivated by height adjustment in the second method step 80, whereby at a stationary plunger 3, a power discharge only is performed by the balancing device 26 with the term "semi-active '·' in the tool stage 6. With the subsequent start of the plunger 3 in the third method step 81 in the second lower reversal point 64 in the second forming plane 68 are the tool stages 4, 5, 7 associated pressing parts

66 reshaped.

With the movement of the plunger 3 in the fourth method step 73 in the direction of the upper reversal point 65 and the same time

Transport of the pressed parts 62, 66 in the adjacent

Tool stages 4-7 in the direction of insertion 55 and subsequent activation of the balancing device 26 in the fifth

Method step 82, the cycle is completed and can be continued with the first method step 79.

The associated sequence of method steps for

Step sequence according to FIG. 9 is graphically visualized in FIG. 10 analogously to the previously described embodiments.

A fifth design for type "simpler

lower ram motion reversal point "in second

Forming level with "active balancing device" is

according to step sequence of the method in Fig. 11a, b and shown

differs from the fourth embodiment in that the movement of the plunger 3 when deactivated

Balancing device 26 in the tool stage 6 in

first method step 83 starts and first the second forming plane 68 started to end the first lower reversal point 60, the deformation of the pressed parts 66 with step-peak force in the tool stages 4, 5, 7, wherein in

adjacent tool stage 6 takes place by Leerweg no or only a partial deformation. With interim

Return stroke of the plunger 3 in an intermediate catch 63 in the second

Process step 84 is a force relief of

Tool levels 4, 5, 7 achieved. At the same time takes place in the third step 85 by activating a Depth adjustment of the tool level 6 assigned

Compensation device 26 as a second main function, the active forming of the pressing part 62 in the first forming plane 67. The fourth method step 73 analogous to the preceding

Embodiments follows in the fifth method step 86 with deactivation of the compensation device 26, the termination of the cycle.

The associated graphical sequence of the method steps for the step sequence according to Fig.lla, b is shown in Fig.l2a, b analogous to the previously described embodiments.

From the sequence of steps of the method of Fig. 13a, b is a sixth embodiment for type "lower simpler

Plunger movement reversal point "on common forming plane with" active balancing device "visible.

In the first method step 87, the movement of the plunger 3 in the direction of the lower reversal point 60 with the activated first compensating devices 26.1, 26.3 and the adjacent deactivated second compensating devices 26.2, 26.4 is started. After starting the lower reversal point 60 of the common forming plane 61 in the second method step 88, the pressing parts 62 in the tool stages 4, 6 with

Reshaped peak force. During the intermediate catch 63 of the plunger 3 in the common forming plane 61, in the third method step 89, on the one hand, the first

Compensation devices 26.1, 26.3 for power relief of the tool stages 4, 6 deactivated by means of height adjustment as a secondary function and on the other hand by depth adjustment, the second balancing devices 26.2, 26.4 as the second

Main function is activated so that in the tool stages 5, 7, the pressing parts 66 are formed with stepping peak force.

The cycle is then with the movement of the plunger 3 in the upper reversal point 65 in the fourth step 73 with simultaneous transport of the pressed parts 62, 66 along the Tool stages 4-7 finished in the direction of flow 55 and continued cyclically with the first method step (87).

The associated graphical sequence of the method steps for the sequence of steps according to Fig.l3a, b is shown in Fig.l4a, b analogous to the previously described embodiments.

LIST OF REFERENCE NUMBERS

1 press table

2 drive

3 pestles

4-7 tool stages

8, 8.1-8.4 upper tool

9-12 pressure point

13 drawbar

14, 14.1-14.4 eccentric wheel

15, 15.1-15.4 connecting rod

16, 16.1, 16.2 servomotor

17 adjusting gear

18 hydraulic pressure pad

19 NC control device

20 pilot-sized signals 21 inverters

22, 22.1, 22.2 Tappet position measuring device

23 measuring signals

24, 24.1-24.4 Lower tools

25 sliding table

26, 26.1-26.4 compensation _V orrichtung

27 sequence control

28 memory for machine and

tool data

29 Function unit for calculating or recording the

tool-specific

gradually forces

30 input signals for calculation or from measurement for the acquisition of the incremental forces

31 Function unit for calculating and / or recording the off-center load with optimization

32 Function unit for generating the setting values of the

_V compensation orrichtung

33 Function unit for calculating the movement sequences for the pressure points of the tappet

34 functional unit for

Positioning control of the

Pressure points of the plunger 35 signal quantities for the calculation of the

Movements of the plunger

36 leading variable signals for the

Control the

_V compensation orrichtung

40 first preparation phase

41 second preparation phase

42 third preparation phase

43 fourth preparatory phase

44 intermediate step

45 fifth preparation phase

46 sixth preparation phase

47 seventh preparation phase

48 start signal

49 first method step of the first embodiment

50 second method step of the first embodiment

51 third process step of the first embodiment

52 fourth step of the first embodiment

53 fifth step of the first embodiment

54 sixth method step of the first embodiment 55 Passage

6 0 first lower reversal point of

tappet

6 1 common forming plane

62 first pressed part, first

Press subgroup

63 intermediate rest

6 4 second lower reversal point of

tappet

65 upper reversal point of the plunger

66 second pressed part, second

Press subgroup

6 7 first forming level

68 second forming plane

6 9 first method step of the second embodiment

70 second method step of the second embodiment

71 third process step of the second embodiment

72 fourth method step of the second embodiment

73 fifth process step of the second embodiment

74 sixth method step of the second embodiment 75 first step of the third embodiment

76 third process step of the third embodiment

77 fourth step of the third embodiment

78 sixth method step of the third embodiment

79 first method step of the fourth embodiment

80 second step of the fourth embodiment

81 third process step of the fourth embodiment

82 fifth step of the fourth embodiment

83 first step of the fifth embodiment

84 second step of the fifth embodiment

85 third process step of the fifth embodiment

86 fifth process step of the fifth embodiment

87 first method step of the sixth embodiment

second method step of the sixth embodiment 89 third process step of the sixth embodiment

Claims

claims

1. A method for Nutzpresskrafterhöhung to servo presses for the production of molded pressed parts (62, 66), in which by means of at least one servomotor (16) operatively connected drive (2) for the movement of the plunger (3) as a first main function with at least one, the one Tool level (4-7) of a preferably multi-stage transfer tool set or one of several sub-stations of a double-station associated balancing device (26) as a second main function or secondary function so in

combinatorial interaction is that the

Peak forces of one or more tool stages (4-7) offset in time and distance so are controllable and controllable to the total usable power compared to the installed

Increase the overall strength of the press.

2. Method for Nutzpresskrafterhöhung to servo presses for the production of molded pressed parts (62, 66) after

Claim 1 characterized

that the plunger (3) as a main function with the upper tools (8) at least twice and successively offset on a common forming plane (61) has a first (60) and second lower reversal point (64) with intermediate return stroke of the plunger (3) in an intermediate catch (63)

Force relief and deactivation of at least one, the respective tool stage (4-7) associated first

Compensation device as a secondary function and

Activation of at least one, the respective one

adjacent tool stage (4-7) associated second

Compensation device as a further secondary function

goes through.

3. A method for Nutzpresskrafterhöhung to servo presses for the production of molded pressed parts (62, 66) after

Claim 2, characterized in that prior to the start of the process sequence in the first preparation phase (40) the machine-specific

Characteristics (press force, stiffness, off-center

Load capacity) in the NC control device (19)

stored in the second preparatory phase (41) the

Force curves in the tool stages 4-7 are entered, calculated, measured or determined by means of a learning stroke that in the third preparation phase (42) the

resulting off-center force curve is calculated, measured or determined by means of a learning stroke that in the fourth preparation phase (43) the in the second (41) and third preparation phase (42)

determined values are compared with the characteristics from the first preparation phase (40), that as a result of the comparison in the intermediate step (44) the alternative subsequent steps are defined, that in case of falling below the permissible

Resilience of the process without activation of the

Compensating device (26) is continued that in case of exceeding the permissible

Load capacity is in the fifth preparation phase (45) the corresponding tool stage (4-7) to

In the sixth preparatory phase (46) of the

resulting off-center force curve with optimization within the permissible characteristics is calculated, measured or determined by means of a learning stroke that, while maintaining the allowable load capacity in the seventh preparation phase (47), the setting values for the selected tool level (4-7) assigned

Balancing device (26) determined and stored in the NC control (19) that in the first step (49), the movement of the plunger (3) started as a main function and at least one step-related first balancing device is activated as a secondary function that in this

Tool stage (5, 7) when approaching the first lower

Umkehrpunktes (60) by Umformweg the associated first pressing member (62) is formed with step-peak force and in the adjacent tool stages (4, 6) with

deactivated second compensating device takes place by free travel no or only a partial deformation, that in the second method step (50) the plunger (3) is moved into an upwardly directed intermediate catch (63) deviating from the first lower reversal point (60), that in the third method step (51) during the

Intermediate lock (63) the previously step-related activated first equalizer or first

Compensating devices by height adjustment

be deactivated and the previously stage-related

deactivated second compensating device or second compensating devices of the adjacent tool stages (4, 6) are activated by depth adjustment. in the fourth method step (52), the plunger (3) starting from the intermediate catch (63)

when approaching the second lower reversal point (64) by Umformweg the associated second pressing member (66) in the activated with the second compensating device (26.1, 26.3) related tool stages (4, 6) with stepped peak power and in the adjacent

Tool stations (5, 7) with disabled first

Compensating device (26.2, 26.4) takes place by Leerweg no forming more that in the fifth step (53) of the plunger (3) with the upper tools (8) in the direction of the upper

Turning point (65) moves and the transport of the pressed parts along the tool stages (4-7) in the direction of passage (55) that in the sixth step (54) the cycle of movement of the plunger (3) with deactivation of the second compensating device (26.1) and Activation of the first Balancing device (26.2) is terminated and the

Movement continues with the first step (49) cyclically.

4. A method for Nutzpresskrafterhöhung on servo presses for the production of molded pressed parts (62, 66) according to

Claim 1 characterized

that the plunger (3) as the main function with the

Upper tools (8) each have a first lower reversal point (60) of a first forming plane (67) and offset in time a second lower reversal point (64) of a second

Forming level (68) with intermediate return stroke of the

Tappet (3) in an intermediate catch (63) with power relief and deactivation of at least one, the respective tool stage (4-7) associated balancing device (26) passes as a secondary function.

5. A process for Nutzpresskrafterhöhung to servo presses for the production of molded pressed parts (62, 66) according to claim

4, characterized in that before the start of the procedure in the first

Preparing phase (40) the machine-specific characteristics (pressing force, rigidity, off-center load capacity) are stored in the NC control device (19) that in the second preparation phase (41) the

Force curves entered in the tool stages (4-7), calculated, measured or determined by means of a learning stroke, that in the third preparatory phase (42) the

determined values with the characteristic values from the first

Preparatory phase (40) are compared, that as a result of the comparison in the intermediate step (44), the alternative subsequent steps are defined, that in case of falling below the permissible

Resilience of the process without activation of the

Balancing device (26) is continued, that in case of exceeding the permissible

Load capacity in the fifth preparation phase (45) the corresponding tool level (4-7) for

In the sixth preparatory phase (46) of the

Balancing device (26) is determined and stored in the NC control (19), that in the first method step (69), the movement of the plunger (3) is started as a main function, and

at least one step-related compensating device (26) is activated as a secondary function so that in at least one of the tool stages (4-7) when starting the first lower reversal point (60) in the first forming plane (67) by forming the associated first pressing part (62) Stepped peak force is reshaped and in the

In the second method step (70), the plunger (3) is moved into an upwardly directed intermediate catch (63) deviating from the first lower reversal point (60), that in the third Method step (71) during the

Intermediate catch (63) the previously step-related activated compensating device (26) by height adjustment

is deactivated, that in the fourth step (72) of the plunger (3), starting from the intermediate catch (63) when starting the second lower reversal point (64) in the second

Forming plane (68) by Umformweg the or the associated pressing parts (66) in the adjacent tool stages (4-7) are formed with step peak power that in the fifth step (73) of the plunger (3) with the upper tools (8) in the direction of the upper one

Reversing point (65) moves and the transport of the pressed parts (62, 66) along the tool stages (4-7) in

Passage direction (55) takes place, in the sixth method step (74), the cycle of movement of the plunger (3) with activation of the

Balancing device (26) is terminated and the

Movement continues with the first step (69) cyclically.

6. A method for Nutzpresskrafterhöhung to servo presses for the production of molded pressed parts (62, 66) after

Claim 1 characterized

that the plunger (3) as the main function with the

Upper tools (8) each have a first lower reversal point (60) of a second forming plane (68) and offset in time a second lower reversal point (64) of a first

Forming plane (67) with intermediate return stroke of the plunger (3) in a intermediate catch (63) with power relief and

Activation of at least one who

assigned to respective tool level (4-7)

Compensation device (26) passes as a secondary function.

7. A method for Nutzpresskrafterhöhung to servo presses for the production of molded pressed parts (62, 66) according to

Claim 6, characterized

that before the start of the procedure in the first

resulting off-center force curve is calculated, measured or determined by means of a learning stroke that in the fourth preparation phase (43) the values determined in the second (41) and third preparation phase (42) are compared with the characteristics from the first preparation phase (40) Result of the comparison in the intermediate step (44) the alternative subsequent steps are defined, that in the case of a fall below the permissible

Resilience of the process without activation of the

Balancing device (26) is continued, that in case of exceeding the permissible

In the sixth preparatory phase (46) of the

Balancing device (26) is determined and stored in the NC control (19), that in the first method step (75) the movement of the plunger (3) is started as the main function and at least one step-related compensating device (26) is deactivated as a secondary function such that in at least one of

Tool steps (4-7) when approaching the first lower one

Reversal point (60) in the second forming plane (68) by Leerweg no or only a partial deformation takes place and in the adjacent tool stages (4-7) by Umformweg or the associated second pressing parts (66)

In the second method step (70), the plunger (3) is moved into an upwardly directed intermediate catch (63) deviating from the first lower reversal point (60), that in the third method step (76) is moved during the

Intermediate catch (63) the previously level-related deactivated compensating device (26) by depth adjustment

is activated, that in the fourth step (77) of the plunger (3) starting from the intermediate catch (63) when starting the second lower reversal point (64) in the first

Forming plane (67) by Umformweg the one or more associated first pressing parts (62) in at least one of

Tool steps (4-7) are formed with step-peak force, while in the adjacent tool stages (4-7) by free travel no deformation takes place that in the fifth step (73) of the plunger (3) with the upper tools (8) in the direction the upper reversal point (65) moves and the transport of the pressed parts (62, 66) along the tool stages (4-7) in the direction of passage (55) that in the sixth step (78) of the cycle of movement of the plunger (3) with deactivation of

Balancing device (26) is terminated and the

Movement continues with the first step (75) cyclically.

8. A method for Nutzpresskrafterhöhung to servo presses for the production of molded pressed parts (62, 66) after

Claim 1 characterized

that the plunger (3) as the main function with the

Upper tools (8) each have a first forming plane (67) and offset in time a second lower turning point (64) of a second forming plane (68) with temporary power relief by deactivating at least one of the respective tool levels (4-7)

Compensation device (26) passes as a secondary function.

9. A method for Nutzpresskrafterhöhung to servo presses for the production of molded pressed parts according to claim 8, characterized in that before the start of the process sequence in the first preparation phase (40) the machine-specific

Characteristics (press force, stiffness, off-center

Load capacity) in the NC control device (19)

get saved, that in the second preparatory phase (41) the

tool-specific incremental forces are calculated or determined by means of a learning stroke that in the third preparatory phase (42) the

off-center load is calculated or determined by means of a learning stroke that in the fourth preparation phase (43), those in the second (41) and third preparation phase (42)

determined values are compared with the characteristic values from the first preparation phase (40) that, as a result of the comparison in the intermediate step (44), the alternative subsequent steps are defined, that in case of exceeding the permissible values

In the sixth preparatory phase (46) of the

resulting off-center force curve with optimization within the permissible characteristic values is calculated, measured or determined by means of a learning stroke,

in that, while maintaining the allowable load capacity in the seventh preparation phase (47), the setting values for the selected tool stage (4-7) are assigned

Balancing device (26) is determined and stored in the NC control (19), that in the first method step (79) the movement of the plunger (3) is started as a main function and at least one step-related compensating device (26) is activated as a secondary function that in the associated tool stage (4- 1) when approaching the first forming plane (67) Umformweg the associated pressing member (62) is formed with step-peak force and in the adjacent tool stages (4- 7) by free travel no or only a partial deformation

takes place that in the second step (80) of the plunger (3) dwells in the first forming plane (67) and in this or the previously stepped-based activated

Adjustment devices (26) are deactivated by height adjustment, that in the third method step (81) the plunger (3), starting from the first forming plane (67)

when approaching the second lower reversal point (64) in the second forming plane (68) by Umformweg the

associated pressing part (66) in the adjacent

Tool stages (4-7) is formed with step-peak force and in the or the tool stages (4-7) with

deactivated compensating device (26) no longer takes place by free travel,

that in the fourth method step (73) the plunger (3) with the upper tools (8) in the direction of the upper

Passage direction (55) takes place, that in the fifth method step (82) the cycle ends with activation of the compensation device (26) and the sequence of movements is continued cyclically with the first method step (79).

10. A method for Nutzpresskrafterhöhung to servo presses for the production of molded pressed parts (62, 66) according to

Claim 1

characterized,

that the plunger (3) as the first main function with the

Upper tools (8) the first lower reversal point (60 of the second forming plane (68) with subsequent return stroke in an intermediate catch (63) for relieving the force of the plunger (3) and the force build-up by activating

at least one of the respective adjacent ones

Tool level (4-7) associated balancing device (26) as a second main function on a first

Traversing level (67) goes through.

11. A method for Nutzpresskrafterhöhung at servo presses for the production of molded pressed parts (62, 66) according to

Claim 10, characterized in that before the start of the process sequence in the first preparation phase (40) the machine-specific

Characteristics (press force, stiffness, off-center

Load capacity) in the NC control device (19)

get saved, that in the second preparatory phase (41) the

determined values are compared with the characteristic values from the first preparation phase (40), that as a result of the comparison in the intermediate step (44) the alternative subsequent steps (?) are defined, that in case of exceeding the permissible values

In the sixth preparatory phase (46) of the

Balancing device (26) is determined and stored in the NC control (19), that in the first method step (83) the movement of the plunger (3) is started as a main function and at least one step-related compensating device (26) is deactivated as a secondary function such that in the associated tool stage (4-7) when starting the first lower reversal point (60) in the second forming plane (68) by Umformweg the

associated pressing part (66) with stepped peak force

is deformed and in the adjacent tool stages (4-7) by Leerweg no or only a partial deformation

takes place that in the second method step (84) the plunger (3) deviates from the lower reversal point (60),

upwardly directed intermediate catch (63) is moved, that in the third method step (85) in the

Intermediate catch (63) the previously level-related deactivated compensating device (26) by depth adjustment for the power in the first forming plane (67) for

Forming of the pressing part (62) is activated, that in the fourth method step (73) of the plunger (3) with the upper tools (8) in the direction of the upper

In the direction of flow (55), in the fifth method step (86), with deactivation of the compensating device (26), the cycle is ended and the sequence of movements is continued cyclically with the first method step (83),

12. A method for Nutzpresskrafterhöhung to servo presses for the production of molded pressed parts (62, 66) according to

Claim 1 characterized

that the plunger (3) as the first main function with the

Upper tools (8) the first lower reversal point (60) with subsequent stoppage of the plunger (3) for one hand to deactivate at least one of the respective tool stage (4-7) associated first

Balancing device or balancing devices for power relief as a secondary function and on the other hand to activate at least one, the respective

passes through adjacent tool stage (4-7) associated second compensating device or second compensating devices as a second main function on the common forming plane (61).

13. A method for Nutzpresskrafterhöhung to servo presses for the production of molded pressed parts (62, 66) after

Claim 12, characterized in that before the start of the process sequence in the first preparation phase (40) the machine-specific

Characteristics (press force, stiffness, off-center

Load capacity) in the NC control device (19)

stored in the second preparatory phase (41) the

tool-specific incremental forces are calculated or determined by means of a learning stroke, that in the third preparatory phase (42) the

In the sixth preparatory phase (46) of the

Balancing device (26) is determined and stored in the NC control (19),

in that in the first method step (87) the movement of the plunger (3) as a main function is started and at least one of the tool stage (4-7) associated with the first

Compensation device as a by-function Depth adjustment is activated and at least one of the adjacent tool stage (4-7) associated second compensating device is disabled by height adjustment that in the second step (88) when approaching the first lower reversal point (60) in the common forming plane (61) by Umformweg the or the associated pressing parts (62) of the associated tool stage with

Step tip force to be reshaped and at least in an adjacent tool stage (5, 7) by Leerweg no or only a partial deformation takes place, that in the third step (89) of the plunger (3) in the first lower reversal point (60) of the common

Forming plane (62) dwells and in this the previously activated first balancing device of the associated tool stage is deactivated by height adjustment for power relief and the adjacent previously deactivated second balancing device with power by

Depth adjustment or the associated pressing parts (66) of the associated tool stage are formed with step-peak force that in the fourth step (73) of the plunger (3) with the upper tools (8) in the direction of the upper

Reversing point (65) moves and the transport of the pressed parts along the tool stages (4-7) in the direction of passage (55) takes place and the movement with the first

Step (87) is continued cyclically.

14. Device for Nutzpresskrafterhöhung to servo presses for the production of molded pressed parts (62, 66) with a mechanically driven plunger, characterized

in

that in the servo press the positions, speeds and torques or forces of the servomotors (16) for

Driving the pressure points (9-12) of the plunger (3) as

Main function by means of controlled by a virtual Leitwelle position cam in combination with the positions, speeds and forces of the or the tool stages (4-7) associated balancing device (26) as a secondary function or second main function are each controlled by an NC control device (19)

in that the central part of the NC control device (19) for the servomotors (16) for the main drive and the drive of the compensating device (26) is a functional unit for

Sequence control (27),

a functional unit for storing machine and tool data (28),

a functional unit (29) for the calculation and / or

Acquisition of the tool-specific step forces,

a functional unit (31) for the calculation and / or

Acquisition with optimization of the off-center load, a functional unit (32) for generating the path and force-dependent setting values for the one or more

Tool levels (4-7) associated balancing devices (26),

a functional unit (33) for calculating the

Movements for the pressure points (9-12) of the plunger (3) and

a functional unit (34) for positioning control of the pressure points (9-12) of the plunger (3).

15. Device for increasing the load force on servo presses. For producing molded pressed parts (62, 66) with a mechanically driven ram (3) according to claim 14, characterized in that

that assigned to the one or more tool levels (4-7)

Compensation devices (26) arranged on the machine side and with the upper tools (8) and / or sub-tools (24) are operatively connected.

16. A device for Nutzpresskrafterhöhung to servo presses for the production of molded pressed parts (62, 66) with a mechanically driven plunger (3) according to claim 14, characterized in that the or the tool stages (4-7) associated with balancing devices (26) in

Upper tool (8) and / or lower tool (24 are arranged.