EP2014420B1 - Outil d'entraînement à combustion de gaz - Google Patents

Outil d'entraînement à combustion de gaz Download PDF

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Publication number
EP2014420B1
EP2014420B1 EP08104032A EP08104032A EP2014420B1 EP 2014420 B1 EP2014420 B1 EP 2014420B1 EP 08104032 A EP08104032 A EP 08104032A EP 08104032 A EP08104032 A EP 08104032A EP 2014420 B1 EP2014420 B1 EP 2014420B1
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EP
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Prior art keywords
new
fan
control parameter
thermal control
control unit
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EP08104032A
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German (de)
English (en)
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EP2014420A1 (fr
Inventor
Tilo Dittrich
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Hilti AG
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Hilti AG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure

Definitions

  • the present invention relates to a combustion-powered setting tool referred to in the preamble of claim 1.
  • Art. Such setting devices can, for. B. be operated with gaseous or vaporizable liquid fuels.
  • a setting piston is driven by combustion gases during a setting process. About this setting piston fasteners can then be driven into a background.
  • Such setting tools have z. B. a fan, which serves, inter alia, for cooling the heated by the expiring combustion processes setting device.
  • the cooling is necessary because it is z. B. important for the thermal piston return that the combustion chamber wall is not too hot.
  • incorrect metering of the fuel may result as a result of excessively high heating of the metering valve.
  • a combustion-powered setting tool which has a combustion-powered energy source and a fan associated with it.
  • a control device is provided which is connected to a temperature sensor which monitors the temperature of the energy source.
  • the length of the running time of the fan in dependence on the temperature of the power source, which is detected by the temperature sensor, adjustable.
  • the disadvantage here is that the provision of a temperature sensor is complex and associated with increased production costs.
  • the temperature sensor must be connected to the control device which is located in the handle assembly, while the temperature sensor is arranged in the vicinity of the power source and in particular of the cylinder for the driving piston, whereby long conduction paths are required.
  • the combustion-powered setting tool is therefore expensive to manufacture.
  • the object of the present invention is to develop a setting device of the aforementioned type, which has a temperature-controlled engine cooling by means of a fan at lower cost. This is achieved according to the invention by the measures mentioned in the characterizing part of claim 1.
  • the controller includes a program for modeling the thermal control parameter based on time data and fan operating data.
  • This measure makes it possible to dispense with the provision of a fault-prone temperature sensor in the vicinity of the combustion chamber, as a result of which the complex wiring with the control unit usually arranged in the grip region is also eliminated.
  • heat supply constants and heat removal constants could advantageously also be used to model the thermal control parameter. This could be in the modeling of the thermal control parameter in addition to the temperature or amount of heat, the z. B. is present in the guide cylinder, and the heat or temperature of the other components of the combustion drive, such. As the setting piston, are taken into account by means of appropriate determination and pre-adjustment of the heat removal constants.
  • a time measuring device for determining a current time is available, whereby the time periods between two setting processes can be determined exactly and whereby z. B. a more accurate calculation of the heat dissipated between two settling processes to the environment is possible.
  • an ambient temperature determined by a temperature sensor can also be used by the program running in the control unit for modeling the thermal control parameter, whereby z. B. a more accurate calculation of the heat dissipated between two settling processes to the environment is possible.
  • a temperature sensor for measuring the ambient temperature also has a longer life than a temperature sensor arranged on the combustion chamber, since it is not exposed to such high temperatures.
  • the ambient temperature temperature sensor can be mounted directly on a board of the control unit, which can save costs.
  • control unit cooperates with a data memory, in particular a nonvolatile data memory, in which the modeled thermal control parameter is modeled as a thermal control parameter of a preceding one Setting process, a current time as a time stamp and the fan operating data are stored.
  • a fan follow-up time of the fan is adjustable in dependence on the modeled thermal control parameter as well as a lower threshold value stored in the data memory and an upper threshold value by the control unit, whereby an exact control of the fan for cooling the combustion drive is made possible.
  • an ambient temperature determined by a temperature sensor is also used in order to be able to more accurately determine the cooling or the amount of heat dissipated to the surroundings up to a certain time.
  • the fan follow-up time of the fan is set by the control unit as a function of the modeled thermal control parameter of the combustion drive and of a lower threshold value and an upper threshold value stored in the data memory, whereby an energy-saving use of the fan can take place that only is then put into operation when the temperature of the combustion drive makes this necessary.
  • This energy-saving usage allows more settlements per battery charge to be achieved.
  • the fan fan speed is set by the control unit as a function of the modeled thermal control parameter of the combustion drive and of a lower threshold value and an upper threshold value stored in the data memory.
  • the fan speed and the fan follow-up time of the fan are set by the control unit as a function of the modeled thermal control parameter of the combustion drive and of a lower threshold value and an upper threshold value stored in the data memory.
  • the setting of a fan follow-up time via the control unit takes place only after switching off the signal of a switching means, so if it is clear that the setting tool has been lifted from a workpiece.
  • FIG. 1 Setting device 10 shown has a generally designated 11 single or multi-part housing in which a combustion drive for a displaceable in a guide cylinder 12 guided setting piston 13 is arranged.
  • a fastener such as a nail, bolts, etc. are driven into a workpiece U, when the setting tool 10 with a pin guide 15, which adjoins the guide cylinder 12 in the direction of the setting piston 13, pressed against the workpiece U and the Combustion drive is triggered.
  • For combustion drive includes, inter alia, a combustion chamber 14 which is alsspannbar in a combustion chamber sleeve 29 and which is limited at both axial ends on the one hand by the guide cylinder 12 and the set piston 13 and on the other hand by a combustion chamber rear wall 19.
  • the combustion chamber 14 is in Fig. 1 already closed because the setting tool 10 has been pressed against a workpiece U.
  • the bolt guide 15 serves to receive and guide fasteners z. B. are stored in a magazine 20 on setting tool 10.
  • a trigger switch 22 is disposed on a handle 21 of the setting device 10, via which an ignition device 23 (which is arranged for example on the combustion chamber rear wall 19), such. As a spark plug, can be triggered when the setting tool 10 has been pressed against a workpiece U.
  • the setting tool 10 in the present embodiment can be operated with a fuel gas or with a vaporizable liquid fuel, which in a not shown in the figures fuel reservoir such.
  • a fuel gas or with a vaporizable liquid fuel, which in a not shown in the figures fuel reservoir such.
  • a fuel can, a fuel tank or the like is provided. From the fuel reservoir goes from a fuel line (also not shown in the figures) which leads to the combustion chamber 14.
  • a total of 16 designated fan serves both to generate a turbulent flow regime of a located in the closed combustion chamber 14 oxidant-fuel mixture and the rinsing of the open combustion chamber 14 with fresh air and the cooling of the combustion chamber 14 after successful setting process.
  • the fan 16 has a fan wheel 17 designed as a propeller, which is arranged on a rotor shaft of a fan motor 18 and which rotates in operation in the direction of rotation of the arrow 40.
  • the setting device 10 with electrical energy is realized via a network-independent electric power source 24 in the form of at least one accumulator.
  • the one or more accumulators can be arranged interchangeable on the setting tool 10.
  • the control of the fan 16 and other device functions via a control unit 30 having a digital data processing unit 37, such as one or more microprocessors.
  • the control unit 30 includes in the illustrated embodiment, a non-volatile data memory 31 for storing data in digital form and a time measuring device 34 for determining a current time t_neu.
  • the control unit 30 is connected to the energy source 24 via a first electrical line 25. Via a second electrical line 26, the control unit 30 is further connected to the trigger switch 22 and via a third electrical line 27 to the fan motor 18.
  • the ignition device 23 is connected via a fourth electrical line 28 to the control unit 30.
  • a switching means 33 designed as a contact pressure switch, which is connected to the control unit 30 via a fifth electrical line 32 and which detects a pressing of the pin guide 15 on a workpiece U, thereby generating a contact pressure signal.
  • a temperature sensor 35 arranged outside on the setting device determines the ambient temperature T_U and is connected to the control unit 30 via a sixth electrical line 36.
  • the temperature sensor can be inexpensively arranged directly on the motherboard of the control unit. To do this, the motherboard must only be far enough away from parts of the device that become hot during operation.
  • Fig. 2 a flowchart is reproduced, which describes a running in the control unit 30, more precisely in the data processing unit 37, running control method for controlling the fan 16 and the fan motor 18 thereof.
  • the control method comprises a data processing program for modeling a thermal control parameter T_neu.
  • a Anpressschaltsignal is received at the control unit 30 (41).
  • the fan with a fan speed W max which corresponds to the maximum possible fan speed of the fan motor 18, is set in operation (42).
  • a trigger switch signal enters the control unit 30 (43).
  • the control unit 30 then triggers a setting process (44), in that the ignition device 23 is activated via the fourth electrical line 28 (cf. Fig. 1 ).
  • the following data are read from the data memory 31 (45a): a modeled thermal control parameter of a previous setting process T_old, a time stamp t_old of a preceding setting process and fan operating data comprising a fan follow-up time rt_2_old a previous setting operation and a fan speed W_2_alt of the fan 16 during the fan follow-up time rt_2_alt.
  • the thermal control parameter may be z. Example, to a temperature in ° C, ° F or K or act on a quantity of heat in kJ.
  • the heat removal constant K_1 includes the heat exchange of the setting device 10 or its combustion drive (with the guide cylinder and setting piston) with the environment and the cooling effect by a Spülauf the fan 16 and by the fan run (42) for generating turbulence after pressing the setting tool 10 a workpiece U.
  • the heat supply constant K_2 includes the heat and temperature increase of the setting device 10 by a setting process.
  • the switching means 33 is switched off.
  • the control unit 30 After detection of the "Anspresschaltsignal off" signal (47), the control unit 30 turns on a Spülauf (48) of the fan 16, in which the fan 16 for a L thoroughlyerpüllaufzeit rt_1 of n seconds with a fan speed W_1, which corresponds to the maximum fan speed W_max operated where n is a constant (eg 2 seconds).
  • the necessary cooling of the setting device 10 and its combustion drive by a fan 16 is determined by the control unit 30 (49).
  • the modeled thermal control parameter T_new is compared with a stored lower threshold T_s1 and with a stored upper threshold T_s2.
  • the thresholds T_s1 and T_s2 may also be defined as a temperature in ° C, ° F or K or as a heat quantity in kJ. If the modeled thermal control parameter T_new is less than the lower threshold T_s1, then the fan 16 is not actuated by the control unit 30 or kept in operation (50a).
  • the fan follow-up time rt_2_neu is z.
  • the fan speed W_2_neu is between a preset minimum fan speed W_min and a preset maximum fan speed W_max. If the modeled thermal control parameter T_new is above the upper threshold T_s2, then the fan 16 is updated by the control unit 30 in a lag (50c) with a fan lag time rt_2_new corresponding to a preset maximum fan lag time rt_max (eg, 120 seconds), and a fan speed W_2_neu operated, which corresponds to the preset maximum fan speed W_max.
  • the fan 16 is turned off by the control unit 30 (51) and the modeled thermal control parameter T_new as modeled thermal control parameter of previous set operation T_att, current time t_new as time stamp t_old and fan operation data (fan lag time rt_2_new, fan speed W_2_new ) stored in the data memory (31) (52), wherein the previously stored there values are overwritten.
  • the newly stored data are used in a new setting process again the modeling of the thermal control parameter T_neu to control the wake of the fan 16, as indicated by the dashed path 53 in Fig. 2 is indicated.
  • the heat removal constant K_s1, the heat supply constant K_s2 and the constant n can both be stored separately in the data memory 31 and read in from the data memory 31 into the data processing unit 37 with the other data during reading (see FIG. 45a). However, they can also be anchored in the data processing program and be read with this into the data processing unit 37.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Claims (11)

  1. Appareil de scellement actionné par combustion interne (10) pour enfoncer des éléments de fixation, avec un moyen d'entraînement par combustion pour un piston-poussoir (13) guidé en translation dans un cylindre de guidage (12) et qui comporte au moins une chambre de combustion (14), avec un ventilateur (16) pour le moyen d'entraînement par combustion, et avec un module de commande (30) pour commander le ventilateur (16) en fonction d'un paramètre thermique de commande (T_neu), caractérisé en ce que le module de commande (30) comporte un programme pour modéliser le paramètre thermique de commande (T_neu) à l'aide de données de temps et de données de fonctionnement du ventilateur.
  2. Appareil de scellement selon la revendication 1, caractérisé en ce qu'un dispositif de mesure de temps (34) est prévu pour déterminer un instant actuel (t_neu).
  3. Appareil de scellement selon la revendication 1, caractérisé en ce qu'une température ambiante (T_U) enregistrée par un capteur de température est également utilisée par le programme exécuté dans le module de commande (30) pour modéliser le paramètre thermique de commande (T_neu).
  4. Appareil de scellement selon une des revendications 1 à 3, caractérisé en ce que le module de commande (30) coopère avec une mémoire de données (31) dans laquelle peuvent être mémorisés le paramètre thermique de commande modélisé (T_neu) en tant que paramètre thermique de commande d'une opération de scellement précédente (T_alt), un instant actuel (t_neu) en tant que repère temporel (t_alt) et les données de fonctionnement du ventilateur.
  5. Appareil de scellement selon la revendication 1 ou 4, caractérisé en ce qu'un temps de postfonctionnement de ventilateur (rt_2_neu) du ventilateur (16) est réglable en fonction du paramètre thermique de commande modélisé (T_neu) ainsi que d'une valeur seuil inférieure (T_s1) enregistrée dans la mémoire de données (31) et d'une valeur seuil supérieure (T_s2) du module de commande (30).
  6. Procédé de commande d'un appareil de scellement actionné par combustion interne, comprenant un ventilateur (16) pour un moyen d'entraînement par combustion et comprenant un module de commande (30), caractérisé en ce qu'il comporte les étapes suivantes :
    - déclenchement d'une opération de scellement (44) après détection (43) d'un signal de commutateur-déclenchant,
    - extraction (45a), à partir de la mémoire de données (31), du paramètre thermique de commande modélisé d'une opération de scellement précédente (T_alt), du repère temporel (t_alt) et des données de fonctionnement du ventilateur,
    - modélisation (46) du paramètre thermique de commande (T_neu) au moins à l'aide du paramètre thermique de commande de l'opération de scellement précédente (T_alt), du repère temporel (t_alt) de l'instant actuel (t_neu), des données de fonctionnement du ventilateur ainsi qu'à l'aide de la constante d'apport thermique (K2) et de la constante de dissipation thermique (K1),
    - mémorisation (52), dans la mémoire de données (31), du paramètre thermique de commande modélisé (T_neu) du moyen d'entraînement par combustion en tant que paramètre thermique de commande modélisé d'une opération de scellement précédente (T_alt), de l'instant actuel (t_neu) en tant que repère temporel (t_alt) et des données de fonctionnement du ventilateur.
  7. Procédé de commande selon la revendication 6, caractérisé en ce que, pour modéliser le paramètre thermique de commande (T_neu), on utilise aussi une température ambiante (T_U) enregistrée par un capteur de température.
  8. Procédé de commande selon la revendication 6 ou 7, caractérisé en ce que, après la modélisation du paramètre thermique de commande (T_neu), le temps de postfonctionnement de ventilateur (rt_2_neu) du ventilateur (16) est réglé par le module de commande (30) en fonction du paramètre thermique de commande modélisé (T_neu) du moyen d'entraînement par combustion ainsi qu'en fonction d'une valeur seuil inférieure (T_s1) enregistrée dans la mémoire de données (31) et d'une valeur seuil supérieure (T_s2).
  9. Procédé de commande selon la revendication 6 ou 7, caractérisé en ce que, après la modélisation du paramètre thermique de commande (T_neu), la vitesse de rotation de ventilateur (M_2_neu) du ventilateur (16) est réglée par le module de commande (30) en fonction du paramètre thermique de commande modélisé (T_neu) du moyen d'entraînement par combustion ainsi qu'en fonction d'une valeur seuil inférieure (T_s1) enregistrée dans la mémoire de données (31) et d'une valeur seuil supérieure (T_s2).
  10. Procédé de commande selon la revendication 6 ou 7, caractérisé en ce que, après la modélisation du paramètre thermique de commande (T_neu), la vitesse de rotation de ventilateur (W_2_neu) et le temps de postfonctionnement de ventilateur (rt_2_neu) du ventilateur (16) sont réglés en fonction du paramètre thermique de commande modélisé (T_neu) du moyen d'entraînement à combustion ainsi qu'en fonction d'une valeur seuil inférieure (T_s1) enregistrée dans la mémoire de données (31) et d'une valeur seuil supérieure (T_s2).
  11. Procédé de commande selon une des revendications 6 à 10, caractérisé en ce que le réglage d'un temps de postfonctionnement de ventilateur (rt_2_neu) par l'intermédiaire du module de commande (30) s'effectue après l'interruption du signal d'un moyen de commutation (33).
EP08104032A 2007-07-11 2008-05-20 Outil d'entraînement à combustion de gaz Active EP2014420B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007000373A DE102007000373A1 (de) 2007-07-11 2007-07-11 Brennkraftbetriebenes Setzgerät

Publications (2)

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EP2014420A1 EP2014420A1 (fr) 2009-01-14
EP2014420B1 true EP2014420B1 (fr) 2009-12-23

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US (1) US8123095B2 (fr)
EP (1) EP2014420B1 (fr)
JP (1) JP5280758B2 (fr)
DE (2) DE102007000373A1 (fr)

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DE102007060307A1 (de) 2007-12-12 2009-06-18 Evonik Degussa Gmbh Verfahren zur Nachbehandlung von Ruß
DE102009041828A1 (de) 2009-09-18 2011-03-24 Hilti Aktiengesellschaft Vorrichtung zur Übertragung von Energie auf ein Befestigungselement
DE102009041824A1 (de) 2009-09-18 2011-03-24 Hilti Aktiengesellschaft Vorrichtung zur Übertragung von Energie auf ein Befestigungselement
DE102010063173A1 (de) * 2010-12-15 2012-06-21 Hilti Aktiengesellschaft Bolzensetzgerät und Verfahren zum Betreiben eines Bolzensetzgerätes
DE102011077832A1 (de) * 2011-06-20 2012-12-20 Hilti Aktiengesellschaft Treibmittelbehälter für brennkraftbetriebene Bolzensetzgeräte
JP2014054690A (ja) * 2012-09-12 2014-03-27 Max Co Ltd 衝撃工具
EP2826601A1 (fr) * 2013-07-16 2015-01-21 HILTI Aktiengesellschaft Procédé de commande et machine-outil manuelle
EP2875902A1 (fr) * 2013-11-26 2015-05-27 HILTI Aktiengesellschaft Appareil de pose avec sonde de température
WO2017045972A1 (fr) * 2015-09-14 2017-03-23 Hilti Aktiengesellschaft Cloueuse fonctionnant au moyen d'un gaz combustible et dotée d'un organe d'alimentation

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US4978239A (en) * 1984-10-04 1990-12-18 International Business Machines Corporation Temperature limiting apparatus and method for printer
DE19625889A1 (de) * 1996-06-27 1998-01-02 Bayerische Motoren Werke Ag Verfahren zur modellgestützten Nachbildung der Kühlmitteltemperatur bei einem Fahrzeug
US6006168A (en) * 1997-12-12 1999-12-21 Digital Equipment Corporation Thermal model for central processing unit
DE10144275A1 (de) * 2001-09-08 2003-03-27 Bosch Gmbh Robert Verfahren zur Temperaturregelung eines Motors
DE10259775A1 (de) * 2002-12-19 2004-07-08 Hilti Ag Temperaturgesteuerter Lüfternachlauf
US7341171B2 (en) 2004-02-09 2008-03-11 Illinois Tool Works Inc. Fan control for combustion-powered fastener-driving tool

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Publication number Publication date
US20090014494A1 (en) 2009-01-15
DE102007000373A1 (de) 2009-01-15
JP2009018414A (ja) 2009-01-29
DE502008000264D1 (de) 2010-02-04
EP2014420A1 (fr) 2009-01-14
US8123095B2 (en) 2012-02-28
JP5280758B2 (ja) 2013-09-04

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