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EP0383879B1 - Drahtpistole mit geregelter vorschubeinrichtung - Google Patents

Drahtpistole mit geregelter vorschubeinrichtung Download PDF

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Publication number
EP0383879B1
EP0383879B1 EP89908995A EP89908995A EP0383879B1 EP 0383879 B1 EP0383879 B1 EP 0383879B1 EP 89908995 A EP89908995 A EP 89908995A EP 89908995 A EP89908995 A EP 89908995A EP 0383879 B1 EP0383879 B1 EP 0383879B1
Authority
EP
European Patent Office
Prior art keywords
wire
gun according
wire gun
motor
feed
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
EP89908995A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0383879A1 (de
Inventor
Ralph Herber
Karsten Eichhorn
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.)
Applied Biosystems Inc
Original Assignee
Perkin Elmer Corp
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 Perkin Elmer Corp filed Critical Perkin Elmer Corp
Publication of EP0383879A1 publication Critical patent/EP0383879A1/de
Application granted granted Critical
Publication of EP0383879B1 publication Critical patent/EP0383879B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/18—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the material having originally the shape of a wire, rod or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/02—Rotary devices, e.g. with helical forwarding surfaces
    • B65H51/04—Rollers, pulleys, capstans, or intermeshing rotary elements
    • B65H51/08—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements
    • B65H51/10—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements with opposed coacting surfaces, e.g. providing nips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/30—Devices controlling the forwarding speed to synchronise with supply, treatment, or take-up apparatus

Definitions

  • the invention relates to a wire gun with a feed device for the wire with a drive wheel driven by a motor for the wire and a counter roller pressing the wire against the drive wheel, and with a device for regulating the feed speed of the wire.
  • Such wire guns are used in so-called flame spraying, the wire being fed through the feed device to a gas head with a spray nozzle.
  • the combustion of a gas that has slid into the gas head together with compressed air and oxygen melts and atomizes the wire material, which is expelled through the nozzle together with the burned gas.
  • a the wire-scanning measuring wheel is provided for measuring the actual value of the feed speed
  • the device for regulating the feed speed of the wire comprises a device for changing the contact pressure of the counter roller as a function of a setpoint deviation which cannot be adjusted by the action of the control device on the motor drive.
  • the wire is moved at a constant feed rate, in that by measuring the actual value of the feed rate and by the variability of the contact pressure of the counter roller on the wire, a slippage leading to uneven wire transport between the drive wheel and the wire can be determined and eliminated is.
  • An advantageous embodiment of the invention consists in providing a counter wheel pressing the wire against the measuring wheel for the measuring wheel.
  • This counter wheel can advantageously be mounted together with the counter roller for the drive wheel on a balance beam on which a pressure device which presses the counter roller against the drive wheel and the counter wheel against the measuring wheel acts.
  • the balance beam can be connected to and held by a handlebar with the wall of the housing provided for the wire gun.
  • the pressure device is adjustable along the balance beam, ie the point of application of the force can be displaced.
  • the pressure force of the pressure device which can expediently be designed as a pressure cylinder, can be distributed differently between the counter wheel for the measuring wheel and the counter roller for the drive wheel, and thus the contact pressure with which the counter roller presses the wire against the drive wheel Adjustment of the slip between the wire and the drive wheel vary.
  • the measuring wheel for measuring the actual value of the feed speed of the wire can advantageously be connected to an incremental rotary encoder which emits a digital signal corresponding to the feed speed.
  • This signal can further process a microprocessor system which can advantageously be used for determining before control signals together with the measured value for the speed of the drive motor, which a tachometer to be connected to the drive motor can deliver.
  • the microprocessor system determines control signals which act on a control circuit to be provided for supplying the drive motor with an operating voltage, and on a control device to be provided for changing the contact pressure of the counter roller, in particular for changing the pressure in a pressure cylinder.
  • a wire gun is generally designated 30.
  • a drive motor 1 which drives a drive wheel 2, is fastened to the housing 31.
  • the axis of the drive wheel is fixed.
  • the wire to be conveyed runs between the drive wheel 2 and a counter roller 3, which can be pressed against the drive wheel 2 and for this purpose is mounted with its axis adjustable in a balance beam 4.
  • a measuring wheel 5 is arranged with a likewise fixed axis.
  • a counter wheel 6 is provided, which is also rotatably mounted in the balance beam 4. As can be seen from FIG.
  • the balance beam 4 can be adjusted in height by means of an elongated hole 7 formed in the balance beam on a pin 8 fastened to the housing and at the same time pivotable about the pin 8.
  • the balance beam is also attached to the housing 31 at one end by means of a rocker 9.
  • a pressure cylinder 10 is arranged below the balance beam, which presses against the underside of the balance beam 4 via a plunger 11.
  • the point of engagement of the ram 11 on the balance beam can be changed along the balance beam in that the pressure cylinder 10 is adjustable in the direction of arrow 12 along the balance beam.
  • the wire 13 to be sprayed which is only shown in FIGS.
  • a wire guide 15 which is eccentrically adjustable depending on the different thickness of the wire is held.
  • the wire is inserted into a gas head 16 arranged on the front of the housing, to which 17 different gases are used as heating and transport gases for the atomized material of the wire can be fed.
  • the gas head 16 is held on a gas head holder 18, which is guided in two elongated holes 19 by means of a spindle 20 and can be adjusted in the vertical direction.
  • the adjustment of the gas head serves to adapt the change in the position of the central longitudinal axis of the wire with different wire thicknesses.
  • the counter roller 3 and the counter wheel 6 can be adapted to wires 13 with different diameters by adjusting the balance beam 4 in the vertical direction in FIG. 3.
  • two gear wheels 21 and 22 are shown in FIG. 3, which are arranged on the axles of the drive wheel 2 and the counter roller 3 and are fixedly connected to them.
  • the gear wheels serve for the uniform drive of the counter roller 3.
  • Corresponding gear wheels can be provided for the measuring wheel 4 and the counter wheel 6, although these are not expressly shown in FIG. 3.
  • the control and regulating system for the feed speed of the wire 13 is shown schematically in FIG. 2.
  • the motor 1 is provided with a tachometer 23 which gives information about the speed of the motor via the line 24 to a microprocessor 25 and a line 26 to a control circuit 27.
  • An incremental rotary encoder is connected to the measuring wheel 5 and, when the wire 13 is moved in the longitudinal direction, outputs corresponding digital signals to the microprocessor 25.
  • a pressure control 29 connected to the microprocessor 25 is provided, which is connected to the pressure cylinder 10 via a line 33.
  • the device works as follows:
  • a wire 13 to be sprayed is inserted at the rear of the housing 31 via the opening 14 and between the opposing measuring wheel 5 and counter wheel 6 as well as the drive wheel 2 and the counter roller 3 and advanced into the front gas head 10. Due to the fact that the balance beam 4 is adjustable in the vertical direction, wires with different diameters can also be processed with a fixed axis of the drive wheel 2 and the measuring wheel 5 without the drive wheel and the measuring wheel having to be replaced depending on the thickness of the wire . However, since in such an arrangement the position of the central longitudinal axis of the wire changes as a function of the thickness of the wire, the wire guide opening 15 is adapted to this longitudinal central axis of the wire by an appropriate adjustment and the gas head 16 by adjusting the spindle 20.
  • a corresponding pressure is applied to the pressure cylinder 10, whereby the balance beam 4 is raised and the counter roller and the counter wheel 3 or 6 are pressed against the underside of the wire and press them against the drive wheel or the measuring wheel.
  • the pressure with which the counter roller 3 or the counter wheel 6 press against the wire can be selected differently in that the pressure cylinder 10 is displaced along the arrow 12, whereby the point of application of the plunger 11 of the pressure cylinder is displaced along the balance beam.
  • the previously usual control of the feed speed of the wire 13 was carried out, for example, in that a predetermined feed speed could be assigned to each speed of the motor due to the drive wheel 2 connected to the drive axis of the motor and its known extent.
  • the feed speed of the wire was determined by this regulation of the speed of the motor 1.
  • a slip often occurs between the drive wheel 2 and the wire which occurs in the aforementioned Regulation of the feed speed of the wire is not determined by the device itself. In these cases, a wire with fluctuating feed rates is fed to the gas head. The result is an incorrect coating of the surfaces to be coated.
  • FIG. 4 An operating diagram for a possible embodiment of a control of the type described is shown in FIG. 4.
  • a N difference between the setpoint and the measured actual value of the feed speed of the wire.
  • the next control step according to FIG. 50 will again determine whether the error signal is already 0. If this is the case, there is no need for further regulation. If this is not the case, it is checked again at 51 whether a N ⁇ 0 is possibly present. If this is the case, the engine speed is reduced via 43. If this is not the case, the control according to 52 again gives a control signal to increase the engine speed. If it is determined in the subsequent scanning according to 53 that the error signal a N decreases, it is determined via 54 that the error signal is already 0. If no reduction in the error signal a N can be determined according to the scanning 53, this leads to the finding that the error cannot be achieved by eliminating the slip either. This means that there must be other faults which are not readily ascertainable and which then lead to its automatic switching off of the feed of the wire as a whole according to 55.
  • the 55 additionally contains, in order to limit the faults which are not readily ascertainable, monitoring the current consumption of the drive motor 1 (FIG. 1), which permits a conclusion to be drawn about the mechanical environment (wire guides, wire reel, etc.). This monitoring is constantly active and can be used for further defined error messages.
  • the regulations in 43, 44 and 47 are subject to narrow limits depending on the wire diameter and the wire feed speed. If these limits are exceeded, the wire feed is switched off with defined error messages.

Landscapes

  • Coating By Spraying Or Casting (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
EP89908995A 1988-07-27 1989-07-27 Drahtpistole mit geregelter vorschubeinrichtung Expired - Lifetime EP0383879B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3825510 1988-07-27
DE3825510A DE3825510A1 (de) 1988-07-27 1988-07-27 Drahtpistole mit geregelter vorschubeinrichtung

Publications (2)

Publication Number Publication Date
EP0383879A1 EP0383879A1 (de) 1990-08-29
EP0383879B1 true EP0383879B1 (de) 1993-04-14

Family

ID=6359676

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89908995A Expired - Lifetime EP0383879B1 (de) 1988-07-27 1989-07-27 Drahtpistole mit geregelter vorschubeinrichtung

Country Status (5)

Country Link
EP (1) EP0383879B1 (pt)
JP (1) JP2811594B2 (pt)
BR (1) BR8907036A (pt)
DE (1) DE3825510A1 (pt)
WO (1) WO1990000937A1 (pt)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3939823A1 (de) * 1989-12-01 1991-06-06 Hoerauf Michael Maschf Vorrichtung zum abziehen von garnen
EP2883824B1 (de) * 2013-12-10 2017-03-22 Komax Holding AG Kabeltransportvorrichtung und Verfahren zum Transportieren eines Kabels

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2414181A (en) * 1944-05-25 1947-01-14 Henry W Dieringer Multiple wire feed mechanism
DE1293659B (de) * 1962-07-03 1969-04-24 Metoo-Inc, Westbury, N.Y. (V.St.A.) Flanunspritzpistole mit Gebläsegasleitung
US3404823A (en) * 1965-01-11 1968-10-08 Metco Inc Flame spray gun with improved drive mechanism
FR2058852A5 (pt) * 1969-09-30 1971-05-28 Pont A Mousson
US3906184A (en) * 1973-05-25 1975-09-16 Kaiser Aluminium Chem Corp Welding process
US4325512A (en) * 1980-02-04 1982-04-20 Norton Company Flame spray gun
US4720044A (en) * 1985-12-13 1988-01-19 Eagle Arc Metalizing Company Electric arc spray metalizing apparatus

Also Published As

Publication number Publication date
DE3825510A1 (de) 1990-02-01
WO1990000937A1 (de) 1990-02-08
BR8907036A (pt) 1991-01-02
JPH03503737A (ja) 1991-08-22
EP0383879A1 (de) 1990-08-29
JP2811594B2 (ja) 1998-10-15

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