EP0860220B1 - Presse - Google Patents

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Publication number
EP0860220B1
EP0860220B1 EP97114623A EP97114623A EP0860220B1 EP 0860220 B1 EP0860220 B1 EP 0860220B1 EP 97114623 A EP97114623 A EP 97114623A EP 97114623 A EP97114623 A EP 97114623A EP 0860220 B1 EP0860220 B1 EP 0860220B1
Authority
EP
European Patent Office
Prior art keywords
course
press
pressing device
pressing
nominal value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97114623A
Other languages
German (de)
English (en)
Other versions
EP0860220A2 (fr
EP0860220A3 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novopress GmbH Pressen und Presswerkzeuge and Co KG
Original Assignee
Novopress GmbH Pressen und Presswerkzeuge and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Novopress GmbH Pressen und Presswerkzeuge and Co KG filed Critical Novopress GmbH Pressen und Presswerkzeuge and Co KG
Priority to US09/026,771 priority Critical patent/US6240626B1/en
Publication of EP0860220A2 publication Critical patent/EP0860220A2/fr
Publication of EP0860220A3 publication Critical patent/EP0860220A3/fr
Application granted granted Critical
Publication of EP0860220B1 publication Critical patent/EP0860220B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B21D39/046—Connecting tubes to tube-like fittings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B21D39/048—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods using presses for radially crimping tubular elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/146—Clip clamping hand tools
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49909—Securing cup or tube between axially extending concentric annuli
    • Y10T29/49913—Securing cup or tube between axially extending concentric annuli by constricting outer annulus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53004—Means to assemble or disassemble with means to regulate operation by use of templet, tape, card or other replaceable information supply
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53004—Means to assemble or disassemble with means to regulate operation by use of templet, tape, card or other replaceable information supply
    • Y10T29/53009—Means to assemble or disassemble with means to regulate operation by use of templet, tape, card or other replaceable information supply with comparator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53039—Means to assemble or disassemble with control means energized in response to activator stimulated by condition sensor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53039—Means to assemble or disassemble with control means energized in response to activator stimulated by condition sensor
    • Y10T29/53061—Responsive to work or work-related machine element
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53087—Means to assemble or disassemble with signal, scale, illuminator, or optical viewer

Definitions

  • the invention relates to a pressing device for connecting workpieces, with a press tool and a motor drive for actuating the pressing tool via a pressing path and with a control device, the drive control device for influencing the drive.
  • the pressing is done with the help of pressing devices like the one below in various embodiments, for example in the DE-C-21 3782, DE-A-34 23 283, EP-A-0 451 806, EP-B-0 361 630 and DE-U-296 04 276.5 are known.
  • the presses have one Press tool with at least two or even more Press jaws that are used radially inwards during the pressing process Formation of a substantially closed press room moves become.
  • the pressing tool is interchangeable on the rest Part of the press attached so that one to each Suitable press tool diameter used for the press fitting can be.
  • the Drive for the movement of the press jaws provided that additionally with a hydraulic unit can be combined.
  • the Drive back a pressing path that usually started with a Empty path begins until the press jaws on the press fitting come to the plant.
  • the deformation follows on the further pressing path of the press fitting and the pipe end up to a final press position.
  • the drive is switched off automatically it in the form of a force limiting element, for example a torque clutch or a hydraulic switching valve, be it by a limit switch in connection with a Jaw closing sensor on the pressing tool (DE-U-296 02 240.3).
  • Incorrect pressing can also occur if one end of the pipe is insufficiently inserted into the press fitting. at Pressing devices that do not have a special monitoring element for this this also goes unnoticed and usually has one Incorrect pressing results.
  • EP-A-0 291 329 there is a stationary press machine disclosed for crimping cable lugs.
  • the pressing force during the pressing process recorded and the resulting press force curve after the pressing process with a reference short compared.
  • a signal is generated, the type of signal allows a conclusion to be drawn on the nature of the pressing error.
  • the disadvantage here is that the pressing process also a faulty pressing is initially carried out to the end, before making a comparison. This can be too high Loads on the pressing tools and the drive up to Cause damage.
  • the invention has for its object a press of the type mentioned in such a way that incorrect pressing avoided with higher reliability or at least can be recognized.
  • At least one is upper and at least one lower limit value curve with formation of a limit value corridor recorded.
  • These can also be constant Limit values.
  • the limit value curves to the course of the actual value with trouble-free Adjustment adapted to form a limit corridor is.
  • the basic idea of the invention is therefore in a pressing device the generic type a fault detection device to be provided if there is a deviation with the compression resistance correlating physical size of one Normal course for a signal formation and / or a shutdown of the drive leads.
  • the signal formation can be optical or acoustically, in the simplest form as Alarm signaling or flashing of an alarm lamp or alarm buzzer, but also depending on the type of disorder in a differentiated Signaling up to a display with a readable fault message or in the form of a speech.
  • the operator receives more or less specified information that there is a malfunction and that therefore the pressing process be interrupted for the purpose of further review should. Instead, or in combination with signaling the drive can also be switched off automatically, so that the pressing process at least not easily can continue.
  • the inventive Fault detection device an essential higher security against mispressing is gained what with a view to the great damage potential of such mispressing is extremely important.
  • the speed it can also be used as a physical quantity the force to be applied, for example by means of strain gauges, be recorded or - analogously - the torque to be applied.
  • the average electrical current is suitable as an indicator of the resistance to compression, because that too changes with this.
  • At least one further upper and / or lower limit value curve is or are recorded on the inadmissible side of the first limit value curve or lie.
  • a narrower and a wider limit corridor formed that can be used to Signal device and the shutdown device in dependence to control which limit corridor to the impermissible Side is left.
  • the wider limit corridor should be designed so that it Not pressing too small or too large press fittings is left, but only, for example, in the event of a break or a blockage, i.e. a comparatively heavy one Disorder.
  • the fault detection device according to the invention with a power control device is combined as part of the drive control device, whereby at least one setpoint curve is recorded as a reference variable , via which one corresponds to the setpoint curve Control variable for influencing the power control device is produced.
  • a drive control device is in DE-U-297 03 052.3 with reference to the unpublished German patent application 196 33 199.4 disclosed. This can drive the performance in the way be limited that the press tool at least to the end of the press has a lower kinetic energy than without power control. This measure ensures that the maximum force, on the moving parts of the pressing device works, is significantly reduced and ideally equal to that to be applied when the workpieces are deformed Maximum force is.
  • the setpoint course can be in two stages be in such a way that in the first phase of the press path and here a small one, especially when overcoming the free travel Performance is specified, which is then applied to the Press fittings in adaptation to the resulting compression resistance is increased.
  • the setpoint curve can be very close adapted to the course of the compression resistance in the manner be that the stress on the power Parts of the pressing device, for example when the Press jaws on the press fitting and especially at the end of the Press way, and thus the creeping changes as a result Wear can be kept low.
  • the Fault detection device can each by location and type of change in the physical detected The size of the faults is recorded relatively precisely and also differentiated can be specified.
  • the power control device and the setpoint curve or the setpoint curves can be part of a sequence control be designed without feedback.
  • the power control device gets according to a desired course the physical quantity associated with the compression resistance correlated, a performance target - for example by adjusting the leading edge in a triac as Power control or pulse width modulation at one Transistor - which at normal compression to a adapted course leads.
  • a sequential control a sequential control with Feedback is provided in which the setpoint curve or each setpoint course from a defining the control bandwidth Control corridor with upper and lower control limits is included.
  • the advantage of this scheme is that in the case of normal compression, the course of the kinetic energy be designed in the moving parts via the press path can make the loads lower, especially in the bearings is held as possible with a sequential control is.
  • the pressing process is independent, for example of voltage changes on the input side or changes in the coefficient of friction in the bearings, on the press jaws or on the press fitting even because they are regulated by the control loop.
  • the course of the setpoint should preferably be represented by a Control corridor with upper and lower control limits be fixed.
  • Both with the sequential control and with the sequential regulation come along as a variable correlating to the compression resistance the speed of the drive also the force to be applied - with a hydraulic drive also the hydraulic pressure - and that torque to be applied and also the average electrical Electricity in question. It is particularly advantageous if the controlled variable with the physical size, with the compression resistance correlated, is identical. In that case, the Limit value curves for the physical quantity very closely to the Setpoint curve can be adjusted, because the control ensures that the control corridor does not normally leave becomes. In this way, a fault that can no longer be corrected detected relatively quickly, especially if the control limits with the limit value curves for the physical Size identical, so the standard corridor and that of the Threshold values included corridor congruent are.
  • This particularly useful training makes the storage special limit value curves can be dispensed with.
  • the regulation should then be set so that certain deviations, such as tolerances, friction coefficient or voltage fluctuations are corrected, but that disorders described above, such as. B. pressing press fittings not matching the press jaws or the appearance broken or blocked, no longer corrected can be, so that the actual value of the controlled variable the control corridor with the result that the signaling device and / or the shutdown device is controlled.
  • the pressing tools are usually interchangeably attached to the drive member the drive part for the pressing of press fittings and pipes to be able to use different diameters.
  • there are also interchangeable among pressing tools in this sense To understand press jaws within press jaw carriers.
  • the only setpoint curve is not for all pressing tools optimal.
  • the pressing device Material sensor for example in the form of an eddy current sensor, to record the material of the workpieces.
  • the use of the pressing device is not only on the pressing of workpieces of a certain material limited, but can also be used for other materials are softer or harder and therefore have a different compression resistance have, are needed.
  • the Drive control device a self-adaptation device over which the limit value curves and, if applicable also the setpoint curve for the actual compression resistance is or are adaptable.
  • Such self-adaptation facilities are known per se in control engineering. they allow es, the limit value curves and, if applicable, the associated setpoint curve in principle in parallel in adaptation to shift to the actual compression resistance, by performing a test injection. With this test pressing the self-adaptation device provides the deviation of the stored limit value curves and puts the deviating values in the place of the previously saved ones Values.
  • the self-adaptation device of Can be activated by hand, so that self-adaptation only then is possible if a test injection is carried out. On in this way it is avoided that erroneous limit value profiles or setpoint curves can be saved.
  • the self-adaptation facility can be especially related to the adjustment to other materials or wall thicknesses of press fittings and pipe end as well as for calibration on a new one Press device can be used advantageously.
  • At least one setpoint curve for the full press travel and for at least one more of these or each of these setpoint curves Setpoint curve for a partial press travel after an interruption of the pressing process are recorded.
  • Setpoint curve for a partial press travel after an interruption of the pressing process are recorded.
  • a plurality of such setpoint curves are stored can be, depending on the the interruption of the pressing process already traveled.
  • limit value profiles are adapted to this setpoint value profile assigned so that even after an interruption Pressing a fault detection adapted to the new setpoint curve he follows.
  • a switch arrangement that can be operated by hand can be used for setting the respective limit value curves and, if necessary, setpoint curves can be provided. In this case, however, operating errors cannot be ruled out. From It is therefore an advantage if it derives from DE-U-297 03 052.3 basic idea of the present invention in the sense is used that the press tool a coding over which the associated limit value curves and possibly the associated setpoint curve can be selected. This poses sure that after replacing the press tool suitable limit value curves and - if a controller or Regulation of the drive is provided, including the setpoint curve to be selected.
  • the coding can be used as a electrical or electronic component be formed, that with the drive device via a transmission link connected is.
  • Examples can be found in DE-GM 297 03 052.3.
  • a memory chip comes in as coding Question because in it a variety of different encodings can be saved.
  • the limit value curve or the limit value curves as well if necessary, a suitable setpoint curve in this memory chip hold.
  • the memory chip can then connect of the pressing tool with the drive part of the pressing device as Part of the drive control can be designed.
  • Such a memory chip can also be used to press path characteristic for the press tool in question - or similarly to save the pressing time. When reached the end of the press path or end of the press time can then be an optical one or emitted an acoustic signal and / or the drive was switched off become.
  • the pressing tool has a position sensor and that in the memory chip a partial press path or a partial press time is stored, wherein the drive is controlled so that only the Partial press travel is carried out when the position sensor is activated becomes.
  • the press path or the partial press path can for one certain size of the press tool can be set. Appropriately it is, however, the press path or partial press path at each Press tool to determine experimentally and the relevant Store value in the memory chip. That way secured that the pressing tool up to its final pressing position, however, it does not go beyond, namely regardless of within the manufacturing tolerances Deviations.
  • a locking device to block the drive Control of the shutdown device is provided, the Locking device only after activating a special unlocking device can be overcome.
  • This training is intended to prevent that an interrupted pressing process only druch actuating the on / off switch again becomes.
  • the unlocking device can also be used for the post-injection provided limit value curves and if necessary select the appropriate setpoint curve, and also additionally in adaptation to the until the interruption of the pressing process Press path covered. To capture the latter too should be a starting sensor to record the starting position of the pressing tool and a distance and / or time sensor be provided. In particular, as a displacement sensor a revolution counter is suitable.
  • the pressing device 1 shown in Figures 1 to 3 is in two parts constructed and consists essentially of a drive part 2 and a pressing tool 3. Both are over one Coupling bolt 4 connected to one another in an articulated manner.
  • An electric drive motor is located in the drive part 2 5 with a drive shaft 6, which is in a bearing 7 is stored.
  • a drive pinion 8 is arranged at the free end, that meshes with a gear 9, which on an intermediate shaft 10 sits.
  • the intermediate shaft 10 is in the bearings 11 and 12 rotatably mounted. It carries a pinion 13, which meshes with a gear 14, which is part of a spindle nut 15 is.
  • the spindle nut 15 is axially immovable in the bearings 16, 17 stored.
  • the spindle nut 15 is one Spindle 18 passes through, the drive motor 5 removed lying end is provided with a clevis 19.
  • spindle nut 15 and spindle 18 mesh in such a way that at Rotation of the spindle nut 15 an axial displacement of the Spindle 18 is effected.
  • the spindle 18 becomes non-rotatable guided.
  • two drive rollers 20, 21 are free rotatably mounted.
  • the drive rollers 20, 21 are located on the circumference to each other.
  • the drive shaft 6 also protrudes at the rear end of the drive motor 5 out and is also stored there in a bearing 22. It carries a speed sensor 23 over its scope magnets 24 are distributed at equal intervals.
  • the speed sensor 23, a speed sensor 25 is arranged opposite the device, the magnetic fields emanating from the magnets 24 is able to detect and send appropriate signals to a here only schematically shown control device 26.
  • the signals are counted there, with the number determined the number of revolutions and thus that of the spindle 18 or the fork head 19 corresponds to the distance traveled. Of the there is also a time interval between two signals a measure of the instantaneous speed of the drive motor 5th
  • the drive part 2 has a housing 27 which is the pressing tool 3 down into a holding fork 28 with two congruent Fork arms 29, 30 that leak such a distance have that the clevis 19 can move between them.
  • the front fork arm 29 is omitted in FIG. 3.
  • the pressing tool 3 shown in Figures 2 and 3 has two congruent support plates arranged one behind the other on, of which here only the front-side support plate 31 see is. Both support plates 31 have the same T-shape and project into the space with their drive-side areas between the fork arms 29, 30 and sit there on the coupling pin 4.
  • the support plates 31 are spaced to each other and are connected to one another via bearing bolts 32, 33.
  • the press jaw levers 34, 35 have drive arms 36, 37 going to drive part 2 and upward jaw arms 38, 39.
  • the drive arms 36, 37 have drive surfaces 40, 41, which are during a pressing process cooperate with the drive rollers 20, 21.
  • the bakken arms 38, 39 have on opposite sides semicircular recesses molded into the contour of press jaws 42, 43.
  • a pressing process is - starting from that shown in Figure 2 Position - initiated by the drive motor 5 by means of an on / off switch that can be operated from the outside is set.
  • the rotary motion emanating from it is in the Spindle nut 15 in a sliding movement of the spindle 18th implemented, in such a way that the clevis 19 in Direction is moved to the press tool 3.
  • Figure 3 shows the final pressing position in which the drive rollers 20, 21 are maximally extended and the front sides of the bakken arms 38, 39 have come to rest (in Figure 3 are Press fitting 45 and pipe end 44 not shown).
  • the control device 26 works with a limit switch 47 together, which is arranged on the outside of the fork arm 29 is.
  • the limit switch 47 has a switch arm 48 which with an actuating projection 49 on the drive arm 37 of the press jaw lever 35 cooperates.
  • the actuation projection 49 presses the switch arm 48 in the open position shown in Figure 2 the press jaw lever 34, 35 in a position in which he the control device 26 signals that the press jaw lever 34, 35 in the initial position, i.e. H. open position are located.
  • the control device can 26 a distance measurement via the speed sensor 23 and the speed sensor 25. Instead of a distance measurement can also a time measurement can be initiated.
  • the drive part 2 of the pressing device 1 can be via the coupling bolt 4 - it is removable - with different sizes can be equipped by pressing tools 3. So that the control device 26 can recognize the type and size of the press tool 3, the pressing tool 3 has a coding, namely in the form of an electrical resistor 50, which in a circuit 51 sits. The resistor 50 can on one protected location of the pressing tool 3 may be arranged. Of the part of the circuit 51 contained in the pressing tool 3 sets itself via spring contacts 52, 53 up to here only as a block symbolized control device 26 continues.
  • the resistor 50 has one for the respective pressing tool 3 specific resistance value. With a resistance measurement the pressing tool 3 can thus be identified. The resistance measurement takes place with conventional analog-digital converters.
  • a jaw closing sensor is located in the circuit 51 54, which is arranged in the right press jaw lever 35. He has a blind bore 55 which leads to the left press jaw lever 34 is open. A tappet 56 is horizontal in the blind bore 55 slidably mounted. It is over a compression spring 57 with a directed towards the left press jaw lever 34 Force applied.
  • the plunger 56 is in two spaced ring webs 58, 59 in the blind bore 55 out and ends in an electrically insulating Rubber piece 60. In the space between the A contact screw 61 projects into the two ring webs 58, 59. Both the plunger 56 and the contact screw 61 are Part of circuit 51.
  • a second resistor can be installed, the value of which clearly different from the resistance 50. In this way becomes a signal confusion with the signal of the jaw closing sensor 54 avoided.
  • FIG. 4 shows part of the control device 26, essentially those by the dashed box marked drive control device 62.
  • core of the drive control device 62 is a microprocessor 63. It is assigned to it is the drive motor 5 with the speed sensor 25, from which a line 64 goes into the microprocessor 63.
  • the Drive motor 5 is powered by a voltage supply line 65 fed, which can be connected to the operating network.
  • the voltage supply line 65 is followed by a shutdown element 66, a power control element 67 - here in Shape of a transistor for the purpose of effecting a reduction in performance through pulse width modulation - and a motor reversing element 68 for the purpose of determining the direction of rotation.
  • the limit switch 66 are the power control element 67 via a line 69 via a line 70 and the motor reversing element 68 via a Line 71 electrically connected to the microprocessor 63.
  • the microprocessor 63 is connected to via a line 72 a manually operated on / off switch 73, via which the drive motor 5 can be started by means of the microprocessor 63 can.
  • the second line 74 is already connected to FIG. 2 described limit switch 47 for the detection of the initial position of the pressing tool 3.
  • the microprocessor 63 becomes specific via a line 75 Specifications submitted. For one, this is the coding of the Press tool 3 through the resistor 50. On the other hand, this is the jaw lock sensor 54. In addition, there is a selector switch 76 provided, over the manually determined boundary conditions for the work of the drive control device 62 can be predetermined can.
  • setpoint curves - can also be referred to as characteristic curves - for example in the form of functions or points for the speed curve saved via the press path. Every setpoint course is specific to a particular press tool 3. At Connection of a specific press tool 3 is through the The above-mentioned check of the resistance 50 is the appropriate one Setpoint curve selected. This setpoint curve is determining for the control of the drive motor 5 via the Power control element 67.
  • the speed sensor 23, the speed sensor 25 and the associated Line 64 belongs to the control loop of a follow-up control, their command variable the respective setpoint curve and their Control variable are the speed. Of the aforementioned elements becomes a corresponding to the speed of the drive motor 5 Signal given to the microprocessor 63, in which this Signal is processed.
  • a comparison device of the Microprocessor 63 is checked whether the actual speed value within the control limits of a control corridor and thus within of the permitted range or outside. In the former The case remains with the phase angle specification of the power control element 67 and thus in the performance target. In the latter case, the leading edge is cut by a certain one Amount changed, so that the performance target is reduced if the speed is too high, and increased if the speed is too low.
  • the scheme is designed so that the one described above Control process under normal conditions for a return of the actual speed value in the control corridor and if possible leads in the middle area. However, the next comparison found that the actual speed value is still outside of the control corridor, there must be a malfunction. Such malfunctions can include pressing a not suitable press fittings, one not completely in the Press fitting inserted pipe end, a break in the drive chain between drive motor 5 and press jaws 42, 43 or a blockage due to jammed Foreign parts or wrinkling on the press fitting 45.
  • Microprocessor 63 then emits a signal which, depending on Art the detected disturbance via line 69 to the limit switch 66 with the result that the drive motor 5 is switched off, and / or via a line 77 to a display 78 is given where the disturbance is appropriately visualized becomes.
  • the control process described above, for a follow-up control is characteristic, be clearer from FIG. 5 made.
  • the ordinate means the speed of the drive motor 5 and the abscissa the press travel.
  • the at Continuous curve 79 starting from zero shows the schematic Speed curve for a specific press tool 3 below Normal condition. It then essentially corresponds to the associated one stored setpoint history.
  • the press path is in a series of sections of equal width - exemplary with 80 designated - divided. At the section boundaries - exemplary designated 81 - is a target-actual comparison made whether curve 79 is still within of a permissible control corridor - designated 82 by way of example - located. This is the case for curve 79 the case.
  • the control corridors 82 are on the top and bottom by changing from section 80 to section 80 upper and lower control limit values - designated 83 and 84, for example - limited. Form all upper control limit values 83 together an upper control limit curve, while the lower Control limit values 84 taken together form a lower control limit curve represent. It is understood that the Division of the press path into sections 80 in the microprocessor 63 is many times finer, so that an actual-target comparison is carried out correspondingly more often.
  • the curve section 86 is typical for a blockage, since the Speed goes steeply towards zero. For example, it can have a blocking effect a foreign part that moves between the Parts of the pressing tool 3 has come. A similar drop in speed shows curve section 87, but here in End area of the press path. This shows wrinkling the outside of the press fitting 45.
  • the steeply rising curve section 88 is characteristic for a non-blocking break. There is no resistance the speed increases suddenly.
  • curve profile according to curve section 89 arises if a press fitting that is too small for the press tool 3 in question is pressed. The resistance is then so low that the Speed leaves the control corridor 82 upwards and also no longer returned by readjusting the phase angle can be. A similar speed curve then arises a, if the tube 44 is insufficient in the press fitting 45th has been inserted.
  • the graphic also shows the course in the event of an interruption of the pressing process.
  • the speed moves according to curve 79.
  • the curve runs according to the dashed line Section 90 straight ahead and then bends in the last Section in line with the new one Compression resistance downwards.
  • an electronic memory chip 100 can also be provided be as shown in dashed lines in Figure 4. This memory chip 100 contains one for the one in question Press tool 3 specific coding and is on the line 101 connected to the microprocessor 63.
  • a memory chip 100 can also be used for the pressing tool 3 specific setpoint curve stored his. This can be done when coupling the press tool 3 transferred with the drive part 2 in the microprocessor 63 and saved there. Has this training the advantage that the drive part 2 with any type of Pressing tools 3 can be combined since each pressing tool 3 stores the setpoint curve that is specific to him Has. The difference is the combination option if a coding is provided on the in the drive control device 62 stored setpoint curves limited, d. H. the drive part 2 can not with new pressing tools 3 can be combined, which have a performance curve should, whose setpoint curve is not in the drive control device 62 is stored.
  • the memory chip 100 also contains memory locations for the Storage of a remaining press path provided. This residual press path is obtained through the following calibration process.
  • the jaw closing sensor 54 is set so that it already responds, ie interrupts the circuit 51 when the bakken arms 38, 39 not quite their final pressing position shown in FIG. 3 achieved.
  • the press tool 3 is then on an appropriate calibration device or with the help of the drive part 2 of the pressing device 1 several times with a specific Force over the full press travel to a final press position, in which the drive arms 36, 37 meet on the end face, moved together.
  • a special program is determined by recording the number of magnetic fields of the speed sensor 24 the residual press path determined by the press lever 34, 35 after the jaw closing sensor 54 has responded still put back. This is repeated until the do not differentiate or only minimally differentiate the measured remaining press paths, the pressing tool 3 has therefore settled.
  • the one after that determined residual press path is stored in the memory chip 100 accepted. It is characteristic of the pressing tool in question 3. Due to manufacturing tolerances Pressing tools 3 of the same size, different residual press paths result.
  • the calibration described above ensures that the Drive motor 5 in a defined, for that Pressing tool 3 characteristic final pressing position switched off becomes.
  • the jaw closing sensor 54 is released during the pressing process the distance measurement for the stored remaining press path, whereby this by counting the pulses detected by the speed sensor 25 happens. After the remaining press travel has been completed, the drive motor 5 switched off via the switch-off element 66.
  • an automatic selection of the appropriate one can be made Restpreßweg done in such a way that during the Pressing the compression resistance at a certain Point of the pressing path and its value as a selection criterion is used.
  • This can be the case with the present pressing device 1 happen in such a way that each one is characteristic Deviation from curve 79 found at the specific location and the measure of the deviation as a selection criterion is used.
  • the remaining press path or the remaining press paths be stored in the memory chip 100. Instead there is the possibility of storing the remaining press paths on the drive part 2 and here in particular in the microprocessor 63. In this case, the remaining press path or the group of remaining press paths by coding based on resistor 50 or the memory chip 100 driven. However, then be assured that for the respective press tool to be connected 3 actually a suitable residual press path or one Group of residual press paths is stored. Comes a press tool 3 for use, for which no residual pressing path or no group of residual press paths is stored, should the calibration process described above - be it using the Drive part 2, be it with the help of a special calibration device - be made up for.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Presses (AREA)
  • Automatic Assembly (AREA)
  • Press Drives And Press Lines (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)

Claims (33)

  1. Appareil de compression (1) pour assembler des pièces (44, 45), comprenant un outil de compression (3) et un moteur pour actionner l'outil de compression (3) sur une course de compression, ainsi qu'un dispositif de commande (26) qui présente un dispositif de commande du moteur (62) pour influer sur le moteur (5), caractérisé par les caractéristiques suivantes :
    le dispositif de commande du moteur (62) possède un détecteur d'erreurs ;
    le détecteur d'erreurs présente un capteur de valeurs réelles (23, 24, 25) ;
    le capteur de valeurs réelles (23, 24, 25) est conçu pour relever une grandeur physique constituant la valeur réelle, qui est en corrélation avec la résistance à la compression ;
    le détecteur d'erreurs a en mémoire au moins une courbe de valeurs limites (83, 84) pour la valeur réelle ;
    le détecteur d'erreurs présente un comparateur qui, au cours de la compression, vérifie en continu si la valeur réelle se situe du côté autorisé de la courbe de valeurs limites (83, 84) ou non ;
    un dispositif de signalisation (78) et/ou un dispositif de coupure (66) pour le moteur (5) font partie du détecteur d'erreurs, qui sont actionnés dès que la valeur réelle se situe du côté non autorisé de la courbe de valeurs limites associée.
  2. Appareil de compression selon la revendication 1, caractérisé en ce que l'on détermine au moins une courbe de valeurs limites supérieure et au moins une courbe de valeurs limites inférieure (83, 84).
  3. Appareil de compression selon la revendication 2, caractérisé en ce que, lors d'une compression se déroulant normalement, au moins l'une des courbes de valeurs limites (83, 84) est adaptée à la courbe de la valeur réelle en formant un couloir de valeurs limites.
  4. Appareil de compression selon la revendication 3, caractérisé en ce que l'on détermine au moins une courbe de valeurs limites supérieure et/ou inférieure supplémentaire (83, 84), qui se trouve(nt) du côté non autorisé de la première courbe de valeurs limites.
  5. Appareil de compression selon la revendication 4, caractérisé en ce que, lorsque la valeur réelle se trouve du côté non autorisé de la première courbe de valeurs limites (83, 84), mais encore du côté autorisé de la courbe de valeurs limites supplémentaire voisine, le dispositif de signalisation (78) est actionné, et lorsque la valeur réelle se trouve également du côté non autorisé de la courbe de valeurs limites supplémentaire, le dispositif de coupure (66) est actionné.
  6. Appareil de compression selon l'une des revendications 1 à 5, caractérisé en ce que la courbe de valeurs limites ou au moins une courbe de valeurs limites (83, 84) est divisée en zones (80) sur la course de compression, sachant qu'à chaque zone (80) est associé un signal spécifique.
  7. Appareil de compression selon l'une des revendications 1 à 6, caractérisé en ce que le dispositif de commande du moteur (62) présente un dispositif de commande de la puissance (67) faisant office d'actionneur, et en ce qu'au moins une courbe de valeurs de consigne (79) est déterminée en tant que grandeur de référence, qui permet d'établir une grandeur de commande correspondant à la courbe de valeurs de consigne pour influencer le dispositif de commande de la puissance (67).
  8. Appareil de compression selon l'une des revendications 1 à 7, caractérisé en ce que le dispositif de commande de la puissance (67) ainsi que la ou les courbes de valeurs de consigne font partie d'un réglage de phase séquentiel.
  9. Appareil de compression selon la revendication 8, caractérisé en ce que la grandeur physique qui est en corrélation avec la résistance à la compression est (sont) le régime du moteur (5), la force à mettre en oeuvre, le couple à appliquer et/ou le courant électrique alimentant le moteur (5).
  10. Appareil de compression selon la revendication 7, caractérisé en ce que le dispositif de commande de la puissance (67) et la ou les courbes de valeurs de consigne (79) font partie d'une régulation en cascade.
  11. Appareil de compression selon la revendication 10, caractérisé en ce que la grandeur réglée de la régulation en cascade est le régime du moteur (5).
  12. Appareil de compression selon la revendication 10 ou 11, caractérisé en ce que la grandeur réglée de la régulation en cascade et la grandeur physique qui est en corrélation avec la résistance à la compression sont de même valeur.
  13. Appareil de compression selon l'une des revendications 10 à 12, caractérisé en ce que la courbe de valeurs de consigne (79) ou chaque courbe de valeurs de consigne s'inscrit dans un couloir de régulation (82) définissant la plage de régulation, qui comporte des limites de régulation supérieure et inférieure (83, 84).
  14. Appareil de compression selon la revendication 13, caractérisé en ce que les limites de régulation (83, 84) sont identiques aux courbes de valeurs limites (83, 84).
  15. Appareil de compression selon l'une des revendications 1 à 14, caractérisé en ce que sont fixées plusieurs courbes de valeurs limites (83, 84) et le cas échéant plusieurs courbes de valeurs de consigne (79).
  16. Appareil de compression selon la revendication 15, caractérisé en ce que les courbes de valeurs limites (83, 84) et le cas échéant les courbes de valeurs de consigne (79) sont adaptées à des outils de compression de différentes tailles.
  17. Appareil de compression selon la revendication 15 ou 16, caractérisé en ce que l'appareil de compression (1) présente un capteur de matériaux pour détecter la nature du matériau constituant les pièces (44, 45), le capteur de matériaux sélectionnant les courbes de valeurs limites (83, 84) et le cas échéant la courbe de valeurs de consigne (79).
  18. Appareil de compression selon la revendication 16, caractérisé en ce que les courbes de valeurs limites (83, 84) et le cas échéant les courbes de valeurs de consigne (79) sont établies pour conférer aux pièces différentes propriétés.
  19. Appareil de compression selon l'une des revendications 16 à 18, caractérisé en ce qu'un commutateur (76) actionnable manuellement est prévu pour sélectionner la courbe de valeurs limites (83, 84) et le cas échéant la courbe de valeurs de consigne (79).
  20. Appareil de compression selon l'une des revendications 1 à 19, caractérisé en ce que le dispositif de commande du moteur (62) présente un dispositif d'adaptation automatique qui permet d'adapter les courbes de valeurs limites (83, 84) et le cas échéant la courbe de valeurs de consigne (79) à la résistance à la compression effective.
  21. Appareil de compression selon l'une des revendications 1 à 20, caractérisé en ce qu'à la courbe de valeurs de consigne (79) ou à chaque courbe de valeurs de consigne sont associées d'autres courbes de valeurs de consigne (90), ainsi que des courbes de valeurs limites convenant pour une compression partielle.
  22. Appareil de compression selon la revendication 21, caractérisé en ce que la courbe de valeurs de consigne (90) ou les courbes de valeurs de consigne pour la compression partielle sont automatiquement associées à la courbe de valeurs de consigne (79) ou aux courbes de valeurs de consigne pour la compression totale lorsque cette dernière est sélectionnée.
  23. Appareil de compression selon l'une des revendications 1 à 22, caractérisé en ce que l'outil de compression (3) présente un code (50, 100) qui permet de déterminer les courbes de valeurs limites (83, 84) et le cas échéant la courbe de valeurs de consigne associée (79).
  24. Appareil de compression selon la revendication 23, caractérisé en ce que le code est constitué par un composant électrique ou électronique (50, 100) qui est relié au dispositif de commande du moteur (62) par le biais d'un élément de transmission.
  25. Appareil de compression selon la revendication 23, caractérisé en ce que le code est réalisé sous forme de puce (100) dans laquelle est au moins mémorisée une courbe de valeurs limites (83, 84).
  26. Appareil de compression selon la revendication 25, caractérisé en ce que la courbe de valeurs de consigne (79) associée est également mémorisée dans la puce (100).
  27. Appareil de compression selon la revendication 25 ou 26, caractérisé en ce qu'est prévu un dispositif pour enregistrer dans le dispositif de commande du moteur (62) les courbes de valeurs limites (83, 84) mémorisées dans la puce (100) et le cas échéant les courbes de valeurs de consigne (79).
  28. Appareil de compression selon l'une des revendications 25 à 27, caractérisé en ce qu'est mémorisé(e) dans la puce (100) la course de compression ou un temps de compression, et en ce que, lorsque la fin de la course de compression ou du temps de compression est atteint(e), un signal optique retentit ou un signal visuel apparaít et/ou le moteur (5) est coupé.
  29. Appareil de compression selon l'une des revendications 25 à 28, caractérisé en ce que l'outil de compression (3) présente un capteur de position (54) et en ce qu'est mémorisé(e) dans la puce (100) une course de compression résiduelle ou un temps de compression résiduel, sachant que le moteur (5) est commandé de telle sorte que seule la course de compression résiduelle est parcourue ou seul le temps de compression résiduel est appliqué après que le capteur de position (54) a été activé.
  30. Appareil de compression selon l'une des revendications 1 à 29, caractérisé en ce qu'est prévu un dispositif de blocage pour bloquer le moteur (5) lorsque le dispositif de coupure (66) a été activé, sachant qu'il n'est possible de passer outre le dispositif de blocage qu'après avoir actionné un dispositif de déblocage spécifique.
  31. Appareil de compression selon l'une des revendications 1 à 30, caractérisé en ce qu'est prévu un capteur de démarrage (47, 48, 49) pour relever la position de départ de l'outil de compression (3).
  32. Appareil de compression selon l'une des revendications 1 à 31, caractérisé en ce que le dispositif de commande présente un capteur de course et/ou un chronomètre (23, 24, 25) pour le processus de compression.
  33. Appareil de compression selon la revendication 32, caractérisé en ce que le capteur de course est réalisé sous forme de compte-tours (23, 24, 25).
EP97114623A 1997-02-21 1997-08-23 Presse Expired - Lifetime EP0860220B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US09/026,771 US6240626B1 (en) 1997-02-21 1998-02-20 Pressing device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29703052U 1997-02-21
DE29703052U DE29703052U1 (de) 1997-02-21 1997-02-21 Preßgerät zum Verbinden von Werkstücken

Publications (3)

Publication Number Publication Date
EP0860220A2 EP0860220A2 (fr) 1998-08-26
EP0860220A3 EP0860220A3 (fr) 2000-07-26
EP0860220B1 true EP0860220B1 (fr) 2003-02-05

Family

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EP97114623A Expired - Lifetime EP0860220B1 (fr) 1997-02-21 1997-08-23 Presse
EP97114624A Expired - Lifetime EP0860221B1 (fr) 1997-02-21 1997-08-23 Presse
EP97114625A Expired - Lifetime EP0860222B1 (fr) 1997-02-21 1997-08-23 Presse et procédé pour le stockage des données de déplacement ou du déplacement résiduel de la presse
EP98102326A Expired - Lifetime EP0860223B1 (fr) 1997-02-21 1998-02-11 Presse pour connecter des pièces

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Application Number Title Priority Date Filing Date
EP97114624A Expired - Lifetime EP0860221B1 (fr) 1997-02-21 1997-08-23 Presse
EP97114625A Expired - Lifetime EP0860222B1 (fr) 1997-02-21 1997-08-23 Presse et procédé pour le stockage des données de déplacement ou du déplacement résiduel de la presse
EP98102326A Expired - Lifetime EP0860223B1 (fr) 1997-02-21 1998-02-11 Presse pour connecter des pièces

Country Status (3)

Country Link
US (1) US6202290B1 (fr)
EP (4) EP0860220B1 (fr)
DE (5) DE29703052U1 (fr)

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Publication number Priority date Publication date Assignee Title
DE202009003196U1 (de) 2009-03-10 2010-04-29 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kommanditgesellschaft Handführbare Antriebseinrichtung für ein Pressgerät
DE202009003197U1 (de) 2009-03-10 2010-05-06 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kommanditgesellschaft Handführbare Antriebseinrichtung für ein Pressgerät
EP2228177A1 (fr) 2009-03-10 2010-09-15 Novopress GmbH Pressen und Presswerkzeuge & Co. KG Dispositif d'entrainement guidé manuellement pour un appareil de pressage ainsi que procédé de commande d'un dispositif d'entraînement guidé manuellement pour un appareil de pressage

Also Published As

Publication number Publication date
EP0860223A3 (fr) 2000-07-26
EP0860222A2 (fr) 1998-08-26
DE59709629D1 (de) 2003-04-30
EP0860223A2 (fr) 1998-08-26
EP0860220A2 (fr) 1998-08-26
EP0860223B1 (fr) 2001-12-05
EP0860222A3 (fr) 2000-07-26
DE59802282D1 (de) 2002-01-17
DE59709268D1 (de) 2003-03-13
EP0860222B1 (fr) 2001-11-07
US6202290B1 (en) 2001-03-20
EP0860221A2 (fr) 1998-08-26
EP0860221B1 (fr) 2003-03-26
EP0860220A3 (fr) 2000-07-26
DE29703052U1 (de) 1997-04-03
DE59705272D1 (de) 2001-12-13
EP0860221A3 (fr) 2000-07-26

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