DE19641979B4 - Method and device for controlling the drive movements of a combing machine, in particular a cotton combing machine - Google Patents

Abstract

Method for controlling the drive movements of a combing machine, in particular a cotton combing machine
- with revolving driven circular comb,
- with a swinging driven pincers apparatus,
- With a driven in the pilgrim tear-off pair and
With a feed arrangement arranged on the pliers apparatus, which is subjected to an intermittent drive,
- Wherein at least the drive of the feed arrangement is associated with an electronically controlled ter drive motor, the program-differentiated drive pulses are supplied by a controller and other drives are derived from a central drive,
characterized,
that the drive movement of the feed arrangement and movement components
For the interaction with the oscillatory movement of the forceps apparatus,
- For the interaction with the movement of the tear-off rollers and
- Setting values for the delay in the combing zone are assigned.

Description

The The invention relates to a method and apparatus for controlling the Drive movements of a combing machine, in particular a cotton combing machine with revolving driven circular comb, with a swinging driven Pliers apparatus, - with a driven in the pilgrim step Abreißwalzenpaar and with a on the pliers apparatus arranged food arrangement, the intermittent Drive is subject to at least the drive of the feed arrangement an electronically controlled drive motor is assigned, the of a controller according to the program differentiated drive pulses can be fed and other drives derived from a central drive are.

The previously known drive systems for the work involved in the combing process of a Baumwollkämmaschine work elements are, for example, in DE 195 04 148 A1 been described. Almost all drives for these work elements are derived from a central drive. For the drive of the forceps apparatus, an eccentric shaft is provided, which controls the movement of the forceps apparatus via cams and coupling gear. In synchronism with this eccentric shaft of the circular comb gets its drive. The tear-off rollers are driven in a conventional manner via a differential gear with a Pilgerschrittbewegung.

each receives this transmission with the construction of the machine a certain movement characteristic, which essentially only by the replacement of transmission elements or by the displacement of articulation points of the transmission elements variable are.

any Corrections in the drive program from a machine engineering point of view or from a textile technological point of view are only in the extremely limited Dimensions possible.

The drive of the feed roll is carried out in the cited reference still on the same principle, as in the DE 33 36 812 A1 has been described. This means that the feed roller can execute its feed stroke either during the forward stroke of the forceps apparatus or during the return stroke of the same in a fixed size and at a fixed time.

With the EP 360 064 A1 It has been proposed to drive the feeding roller mounted on the tongs apparatus via an electronically controlled stepper or servo motor and to transmit to this motor - either at the time of feed-forward or at the time of flyback - drive pulses which carry out the required feeding movement.

One Such a project failed in the beginning, because it is not economically possible was the drive movement of such a motor on the moving lower tongs on each combing head transferred to.

With the DE 195 06 351 A1 has already been proposed - while maintaining the usual drives for the eccentric shaft, for the circular comb and for the Abreißwalzen - to provide a central drive shaft for driving the feed rollers on the lower tongs, which also formed the pivot bearing of the lower jaw at the same time.

At same place has been proposed this central drive shaft for the Power feed rollers by an electronically controlled motor. this Motor became a modifiable drive program through the central control assigned, in addition to the drive pulses for the supply or return feed also drive pulses for compensating for the oscillatory movement of the forceps.

Also With this reference you kept to the previous drive concept that the Majority of drives for a very specific sub-function of the combing process was solely responsible and each drive is to be modified with respect to this function.

The Drive movement of the forceps apparatus, which has a very large stroke at a considerable mass of the forceps apparatus in a very short time guarantee had to, was still derived from a rigid drive system.

This System ensured optimal conditions for the acceleration and deceleration of the forceps apparatus. Every intervention in this movement led to a worse one Run the machine.

The Drive movements for the tear-off rollers have to in a similar way Be considered. It also depends on that, in a very short time Time periods with very large Massive complicated movements according to the pilgrim-step-principle over relative size To move the angle of rotation.

Also these working elements of the combing machine make the very highest Requirements for the laws of motion, if you have very high Kammspielzahlen to reach.

With the EP 374 723 B1 Attempts have been made to realize the movement of the Abreißwalzen using a motor drive. the main goal This measure was to replace the expensive planetary gear. Practice has shown that the electric motor drives for such complicated movements are not yet suitable. The previously achieved with mechanical drives Kammspielzahlen be achieved with the electric drives so far.

at One must have this fact assume that too This drive is not suitable, in addition to this complicated Basic movement any textile technological or technical View necessary movement adjustments by a corresponding program change to realize. Such a measure would undoubtedly be back lead to power losses.

in the Framework of development of combing machines it applies - beside the increase the Kammspielzahlen per time unit - primarily, the textile technological Parameters, the delay, the overlap and to vary both the location of the fibers in the layered web as well as in an optimal way.

this Requirements and conditions presented here can be the previously known methods to control the drive movements do not do justice.

The publication DE 4312 041 A1 describes an electric drive for combing machines, wherein a separation of the axle drives takes place and mechanical gear trains are replaced by regulated electrical drives and the drives a master computer is connected upstream. In the known arrangement, the feed roller drive is realized by a regulated electric drive. With the in the publication DE 43 12 041 A1 described device is intended to reduce the variety of gear trains, the noise and the wear lowered and the possibility of variation of the movement conditions of the axes are improved to each other. However, it is not possible with the known device to better coordinate the combing process per se or to make textile technological parameters.

The Object of the present invention is to provide a method and a Device for controlling the drive movements of a combing machine to suggest that it allows the movements of the most essential Aggregates involved in the combing process from a textile technological point of view under different To coordinate conditions and textile technological parameters variable and programmable.

According to the invention this Task by the defined in claim 1 procedure to surprising solved in a simple way. The drive movement of the feed roller is a relatively easy manageable Movement, the travels for the textile technological modification of cooperation with the pliers apparatus and the tear-off rollers allows.

To the Others, the feed roller is almost over the entire combing process with the tan and the combing Fiber layer in conjunction, so this feed roller also in each Phase the textile technological requirements, in particular the Tanning, can influence.

With The design of the method according to claims 2 and 3 can both the overlap the tufts as well as the delay during the combing process in certain circumstances while correct the run of the machine.

The claims 4 to 6 show possibilities how to be dependent on the thickness of the sliver produced or depending on the combing machine from the mass of the fed Fiber layer regulate the drive movements of the feed arrangements can.

It has proven to be useful, the drive programs for the food arrangement in the electronic control of individual program segments to assemble and for to provide each segment with interchangeable, modifiable units.

The Modifications of the method according to claims 8 and 9 also allow the high quality demands on the also manufactured fleece during to ensure the unavoidable machine downtime.

The claims FIGS. 10 to 13 define sub-functions of the combing process that are used with the method for Controlling the drive functions according to claim 1 can be realized and lead to positive effects in the combing process.

The claims FIGS. 14 to 19 define the advantageous embodiments of the device for execution the defined procedural elements.

The The present invention will be explained below with reference to an exemplary embodiment be explained in more detail. The associated Drawings show:

1 : a cross-section through the workstation of the combing machine in schematic form with the pliers open,

2 : a part of the cross section analogous to 1 with closed pliers,

3a FIG. 2: a schematic diagram of the drive movement of the feed roller, based on the successive functions in the combing play,

3b : a schematic diagram of the movement of the forceps apparatus,

3c a schematic diagram of the movement of the Abreißwalzenpaares and

4 : a cross section through the profile of the feed rollers.

The invention will be described with reference to a cotton combing machine. This combing machine has a drive shaft 1 for the feed rollers 5 which extends over several combing heads of the machine and the directly or via corresponding toothed drives of a stepper or servo motor 12 is driven.

This wave 1 is at the same time the pivot bearing for the lower tongs 2 , On the support arm 21 the lower tongs 2 is the upper nipper shaft in the lower area 22 arranged. On this wave 22 inter alia, the coupling (not shown) for the swinging movement of the lower tongs 2 which receive their movement, for example, from the roller levers of an eccentric shaft.

On this top tongs wave 22 is also the guide arm 32 the upper tongs 3 pivoted. This receives its drive via a further coupling, (not shown) also from roller levers of the eccentric shaft or by a pneumatic control system. On the guide arm 32 the upper tongs 3 is in the corresponding assignment to the terminal strip 20 the lower tongs 2 the terminal block 31 ,

This terminal block 31 has a short clamping nose and a further downward deflection projection. In the intermediate throat an elastic body is preferably inserted.

The terminal block 20 the lower tongs 2 is in the range of movement of the terminal block 31 on the support arm 21 the lower tongs 2 attached. It has at its lower end an upwardly directed nose, with the elastic body in the clamping rail 31 interacts. The terminal strip 20 the lower tongs 2 immediately adjacent is the lower feed roll 4 stored, at its periphery a sinusoidal shaped tooth profile 41 owns ( 4 ).

Above this lower feed roll 4 is in appropriate guides on the lower nipper 2 the upper feed roller 5 held. She becomes poor over the burden 23 frictionally against the lower feed roll 4 pressed.

The trained on its circumference sinusoidal tooth profile 51 combs with the lower feed roller 4 ,

To avoid unwanted displacements of the clamping points at the between the feed rollers 4 . 5 guided fiber layer 6 Can the feed rollers 4 . 5 in addition to the interlocking sinusoidal tooth profiles 41 . 51 be associated with a normal gear pairing, which meshes outside the fleece and the movement of upper 5 and lower feed roll 4 exactly coordinated.

The motor 12 for driving the feed roller 5 transmits his movement over the gear 11 , the intermediate wheel 53 and the drive wheel 52 the upper feed roller 5 on the same.

The the engine 12 directing control 13 processes both information to ensure the synchronicity to the rotary motion of the circular comb 9 and other elements, as well as information to ensure textile technological parameters, which are reflected in particular in the thickness of the fiber sliver produced per combing head or per machine.

Corresponding sensors 14 . 15 supply the controller 13 with the necessary electrical signals.

In 1 a position is shown in which the terminal strips 31 . 20 away from each other. The previously combed tan 67 was just torn off and is from the tear-off rollers 8th deducted and consolidated by a concerted amount. The feed rollers 4 . 5 promote a section 62 the fiber layer 61 between the opened terminal strips 20 . 31 ,

Subsequently, the upper terminal strip lowers 31 , It directs the fiber layer with its pre-directed deflection nose 61 down and clamps the fiber layer against the nose of the lower tongs 20 ,

The necessary in this process greater length 63 the fiber layer 61 caused by the action of the nose of the terminal strips 20 . 31 is deflected, is through the feed rollers 4 . 5 nachgefördert in synchronism, so that between the terminal points of the terminal strips 20 . 31 and the feed rollers 4 . 5 no uncontrolled delay occurs.

After the Rundkämmvorgang abge is closed, raises the terminal block 31 the upper tongs 3 , In this phase, it is important that the just combed tuft 67 moves up quickly and is ready to be placed on the returned fleece.

This process is characterized by a retrograde movement of the feed rollers 4 . 5 supported. It is sufficient here usually that the feed rollers 4 . 5 the fiber layer 61 about the amount 64 who is of similar size 63 to compensate for the Anspannverzuges was fed back again.

The over the connecting line 25 between the two described clamping points near the feed rollers protruding leadership 24 causes in this retraction the faster erection of the combed tuft 67 ,

In this phase, the lower tongs swing 2 against the tear-off rollers 8th who have returned the fleece by a certain amount in the meantime. The combed part of the tuft is laid up. In this phase, the feed rollers 4 . 5 the pliers take part of the movement.

The stroke of the lower tongs 2 can be adapted to the most favorable law of motion. The textile technologically necessary movement of the tuft 67 during the application movement is ultimately by the feed roller 4 . 5 certainly.

The tear-off rollers 8th move again in the withdrawal direction and solder the applied tuft 67 and the returned fleece together.

In this case, the middle section of the tuft passes 67 between the teeth of the Fixkammes 7 ,

The of the tear-off rollers 8th captured fibers are through the teeth of the Fixkammes 7 drawn. The undetected fibers remain in the fiber layer. The fiber layer 61 separates from the combed and soldered tan 67 , This process is called the tear-off process.

this tearing off You can either by a backward movement pliers and / or additional, if necessary, changeable Support movement of the feed rollers.

In the present example, this tearing process is due to the retraction movement of the feed rollers 4 . 5 supported. The absolute amount of the return stroke of the pliers 2 can be reduced.

As soon as this tear-off process is completed, the new feeding process can begin 62 to be started. It does not matter in which phase the stroke of the pliers 2 currently located.

This dining stroke 62 the feed rollers 4 . 5 can both during the backward movement of the forceps 2 during the movement reversal of the forceps 2 until the movement of the pliers 2 in the direction of the tear-off rollers 8th be performed.

The movement stroke of the pliers 2 . 3 is thus determined only by the requirements of Rundkämmens and the requirements of the application. It is thus possible to approximate all movements of the elements involved in the combing process to an optimum and to achieve high comb play numbers.

The order of this movement of the feed rollers is dependent on the functions to be performed in each case 3a shown again. The processes shown there can be retraced with respect to the process just described.

The 3b show in phase 3a schematically the movement ZA of the forceps apparatus 2 , Dashed ZA 'movement is plotted, which the pliers apparatus 2 would run if the feed roller was not moving at this time.

3c shows an in-phase movement form AW of the Abreißwalzen B. This movement AW is aligned with optimal acceleration conditions. Possibly. necessary conditions to ensure a faultless laying of the tuft 67 can by correcting movements of the feed rollers 4 . 5 be determined.

In the 4 illustrated design of the profile of the feed rollers supports the concerns of the present invention to the effect that the set of feed roller pair movement is also accurately transferred to the fiber layer to be processed.

Instead of The feed roller pairing shown here can be used for the realization The invention also use a device which only a single Feed roller has, which cooperates with an elastic pressure piece.

at this embodiment However, it must be ensured that the Fiber layer on the immovable pressure piece slides very well and the followed by the feed rollers predetermined movement immediately follows.

following There are still some special features for the way the drive control for the engine the feed rollers are described.

At comb play numbers from 300 to 350 / min. stands for the recalculation of the motion parameter ter for the feed rollers 4 . 5 On the basis of measured values for the thickness of the sliver and depending on the respective speed of the machine only a very short time available.

This extremely short time also overburdens the computers used and used today for providing the drive data for the motor 12 ,

For this reason, the controller - especially for driving the feed rollers 4 . 5 - So-called command register specified, containing ready calculated commands corresponding to certain measurements of the thickness of the sliver and the speed of the machine.

By This measure can practically every comb game that the respective measurement result Program can be specified.

a further positive effect regarding the real time control of the We derive motion laws by dividing the programs into program segments split. To adapt to certain conditions in the machine it is not necessary to change the entire program. It is enough to insert a modified segment.

The Quality improvement of the combed Fleece and thus the produced sliver almost enforces the Avoiding mistakes in the belt or fleece even during stopping operations.

to solution this problem must be hedged be that the comber comes to a standstill at each stop in a position where the Parameters of the produced fabric are not adversely affected könnnen and that the Start of the machine, independent from those carried out at a standstill Manipulations, again in a position is triggered, the stop position equivalent.

For this purpose, the machine control is given a form of stopping control which can realize this objective. This control has a memory for the position of the machine, which is taken at the stop and a stop control, which always brings the machine to a halt when the pliers apparatus 2 . 3 with his feed roller 4 . 5 in the rearmost position, ie after completion of the tearing process, is located. In this position, all controls for the operator are easily accessible.

1

drive shaft

11

drive wheel

12

engine

13

control

14

sensor (Synchronization)

15

sensor (textile technological parameters)

2

lower nipper

20

terminal block

21

Beam

22

A nipper shaft

23

loading arm

24

guide

25

connecting line (Terminal points)

3

A nipper

31

clamping rail

32

guide

4

feed roll (below)

41

surface profile

5

Feed roller, above

51

surface profile

52

drive wheel

53

idler

6

fiber layer

61

front section

62

feeding section

63

dessert section

64

Redelivery step (Straightening the tuft)

65

soldering step

66

Abreißschritt

67

tuft

7

top comb

8th

detaching

9

circular comb

S5

Move feed roll

S2

Move pliers apparatus

S8

Move detaching roller

SP

trajectory the feed roller

ZA

trajectory pliers apparatus

AW

trajectory detaching roller

Claims (19)

Method for controlling the drive movements of a combing machine, in particular a Baumwollkämmaschine - with circumferentially driven circular comb, - with a swinging driven tong apparatus, - with a driven in the pilgrim step Abreißwalzenpaar and - with a arranged on the forceps apparatus feed arrangement, which is subjected to an intermittent drive, - at least the drive of the feed arrangement is associated with an electronically controlled ter drive motor, which are supplied by a control programmatically differentiated drive pulses and other drives are derivable from a central drive, characterized in that the drive movement of the feed arrangement and motion components - for the interaction with the oscillating movement of the forceps apparatus, - for the interaction with the movement of the Abreißwalzen and - are assigned values for the delay in the combing zone. Method according to claim 1, characterized in that that the Drive movement of the feed arrangement and manipulated values for the overlap the tufts in the soldered Fleece be assigned. Method according to claim 1 or 2, characterized that the Drive movement of the feed arrangement in dependence on the thickness of the generated Sliver controlled control values for the delay in the combing zone fed become. Method according to claim 1 or 2, characterized that the Driving movement of the feed arrangement in dependence on the mass of the supplied fiber layer regulated control values for the Warp in the combing zone be forwarded. Method according to Claims 1 to 4, characterized that the Drive movement of the feed arrangement a plurality of drive programs be assigned manually or depending on technical or textile technological measurements from the area of the combing machine, can be assigned to the drive. Method according to Claims 1 to 5, characterized that the drive movement the feed arrangement the drive programs - depending on the measurement results a device for determining the density of the sliver and - dependent on from the measurement results a device be assigned to determine the Kammspielzahl per unit time. Method according to one of claims 1 to 6, characterized that the drive program for the feeding arrangement - out several, freely configurable program segments composed will and - each individual program segment through a modified program segment is replaceable. Method according to one of claims 1 to 7, characterized that the Drive devices of the combing machine by means of stopping circuit in the rear position of the forceps apparatus can be stopped. Method according to claim 8, characterized in that that the stop position the machine is stored and that before a restart the machine, the drives of the machine are returned to the stop position. Method for feeding a fiber layer between the terminal strips of the tong mechanism of a combing machine by means of feed roll, which has its bearing on one of the pliers legs, - is fed before closing the terminal strips a predetermined length of the fiber layer as a front portion between the terminal strips, - the front portion between the terminal strips the upper nipper and lower nipper clamped and presented to the round comb and combed out to the tuft, - raised the front section with the combed tuft after combing, placed on the returned by the Abreißwalzen fleece and is subsequently soldered by the Abreißwalzen, - the soldered tuft by means of Abreißwalzen by the teeth of the fixed comb are pulled and demolished by the fiber layer fixed by the feed roller, characterized in that during the closing of the clamping rails by the feed roller a predetermined portion ( 63 ) the fiber layer is fed. Method according to claim 10, characterized in that when opening the terminal strips ( 20 . 31 ), after combing the front section to the tuft ( 67 ) a part of the fed fiber layer ( 61 ) through the feed rollers ( 4 . 5 ) and erecting the front section ( 61 ) with the tuft ( 67 ) is supported. Method according to claim 10, characterized in that during the tear-off process the front section ( 61 ) of the fiber layer ( 6 ) by means of feed roller ( 4 . 5 ) is withdrawn. A method according to claim 10, characterized in that in the phase of laying the front combed tufts ( 67 ) on the through the Abreißwalzen ( 8th ) returned the drive program of the feed roller ( 4 . 5 ) is variable. Apparatus for carrying out the method according to any one of claims 1 and 10 to 13, on a combing machine - with tear-resistant rollers mounted in a substantially stable position in position, - with oscillating forceps apparatus, on which at least one feed roller is located in front of the clamping bars is arranged with counter-holding element, - and the feed roller for the drive an electronically controlled motor is associated with corresponding transmission elements, characterized in that the electronically controllable motor is a reversible motor ( 12 ) is, within a comb play on the basis of a, related to the rotation angle drive program repeatedly Umsteuerimpulse be forwarded. Apparatus according to claim 14, characterized in that the counter-holding element ( 4 ) of the driven feed roller ( 5 ) a second feed roller ( 4 ) and that both feed rollers ( 4 . 5 ) at its periphery with a meshing tooth profile ( 41 . 51 ) are provided. Device according to one of claims 14 or 15, characterized in that between the clamping point of the terminal strips ( 20 . 31 ) of upper ( 3 ) and lower tongs ( 2 ) and the clamping point of the feed rollers ( 4 . 5 ) in a conventional manner a leadership ( 24 ) is arranged for the fiber layer and that this guide ( 24 ) near the nip point of the feed rollers ( 4 . 5 ) above and near the terminal point of the terminal strips ( 20 . 31 ) below the connecting line ( 25 ) is located between both terminal points. Device according to one of claims 14 to 16, characterized that the Control for the Drives of the combing machine a stop control is assigned, which processes pulses of a donor, which detects the rear position of the forceps apparatus and the Machine stops when the forceps apparatus in the rear Position is located. Device according to one of claims 14 to 17, characterized that the stop control a position memory is assigned, which detects the stop position and that before the restart the machine the drive control of the machine Returns work items to this position. Device according to one of claims 14 to 18, characterized that the engine for the Speisewalzenantrieb assigned a control with command registers is and that the Selection of the commands from the command registers by a combination from measured variables the thickness of the sliver produced and the speed of the machine he follows.