EP2566660B1 - Vorrichtung zur erzeugung eines drehmomentgenauen anzugsmoments für schraubverbindungen - Google Patents

Vorrichtung zur erzeugung eines drehmomentgenauen anzugsmoments für schraubverbindungen Download PDF

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Publication number
EP2566660B1
EP2566660B1 EP11779553.4A EP11779553A EP2566660B1 EP 2566660 B1 EP2566660 B1 EP 2566660B1 EP 11779553 A EP11779553 A EP 11779553A EP 2566660 B1 EP2566660 B1 EP 2566660B1
Authority
EP
European Patent Office
Prior art keywords
torque
multiplier
gear ratio
wrench
input
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.)
Not-in-force
Application number
EP11779553.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2566660A1 (de
Inventor
Marc Gareis
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.)
Gedore Torque Solutions GmbH
Original Assignee
Gedore Torque Solutions GmbH
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 Gedore Torque Solutions GmbH filed Critical Gedore Torque Solutions GmbH
Priority to PL11779553T priority Critical patent/PL2566660T3/pl
Publication of EP2566660A1 publication Critical patent/EP2566660A1/de
Application granted granted Critical
Publication of EP2566660B1 publication Critical patent/EP2566660B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25B13/00—Spanners; Wrenches
    • B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
    • B25B13/461—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
    • B25B13/467—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member which are gear-operated
    • 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
    • B25B17/00—Hand-driven gear-operated wrenches or screwdrivers
    • B25B17/02—Hand-driven gear-operated wrenches or screwdrivers providing for torque amplification
    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0078—Reaction arms
    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/142—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
    • B25B23/1422—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters
    • B25B23/1425—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters by electrical means

Definitions

  • the invention relates to a device for generating a torque-precise torque for screw according to the preamble of claim 1 and a method for calibrating such a device according to the preamble of claim. 6
  • Torque wrenches and torque multipliers are known in various embodiments from the prior art.
  • a torque wrench with an RFID reader and an RFID antenna for identification of the torque wrench is in the US 2008/0115636 A1 disclosed. With such a torque wrench can be determined whether a desired torque has been generated.
  • Torque multipliers also referred to as force multipliers in the following, generally have highly-geared planetary gears. Spur gears or epicyclic gears are also used occasionally in torque multipliers.
  • the input torque is set manually and usually generated with the help of a ratchet or with the help of a torque wrench.
  • the output torque of the transmission can then be determined on the basis of a previously determined and known transmission ratio stored, for example, in a table. However, the transmission efficiency is not considered. Alternatively, the output torque of a torque setting table, which is also previously determined, taken. Here, the transmission efficiency is taken into account, with interpolation being carried out at intermediate values.
  • a first known from the prior art solution provides to integrate a torque sensor in the transmission of the force multiplier.
  • the sensor must be supplied with energy via an external evaluation unit, also called a datalogger. In this the data is recorded and stored.
  • the invention is therefore based on the object to provide a device which allows the operator to be used without restrictions by cables or external devices and on the other hand ensure the greatest possible security in determining the output torque.
  • the electronic torque wrench has a display to display the output torque described above, wherein input and output torque are related to the transmission.
  • the memory is - among other data - advantageously also stored in the calibration gear ratio of the torque multiplier stored.
  • the gear ratio is preferably stored as an interpolation curve of the functional relationship of the output torque in dependence on the input torque of the torque multiplier in the memory.
  • a particularly advantageous embodiment provides that the transmission have an RFID transponder and the torque wrench an RFID reader, which are matched to each other.
  • the torque wrench detects the gearbox. It can be stored in the memory, the transmission characterizing data used to determine the tightening torque of the screw.
  • Another object of the invention is to provide a method which can easily be used for a common calibration of torque multipliers and electronic torque wrenches, in particular, specific data of the torque multiplier and in particular its transmission should be taken into account in the calibration.
  • This object is achieved by a method for calibrating a device for generating a torque-precise tightening torque for screw with the features of claim 6.
  • the common calibration of the torque multiplier together with the electronic torque wrench is carried out so that the transmission ratio based on at least one over the entire torque range obtained Average value takes place.
  • This so determined gear ratio is stored in the memory of the torque wrench and taken into account in the determination of the tightening torque of the screw in subsequent screwing.
  • the actual transmission ratio over the entire torque range is determined and stored at different angular positions of the output shaft of the torque multiplier.
  • the transmission ratio is first determined and stored over the entire Wheelöment Scheme at a first angle, then the output shaft is further rotated by predeterminable angle and determined at each of these angular positions over the entire torque range, the transmission ratio and stored.
  • the output shaft is further rotated by an angle of 90 ° until it is twisted overall by an angle of 180 °.
  • This further rotation by predeterminable angles is based on the knowledge that the torque curve of the output torque as a function of the input torque substantially shows a periodic curve which can be described by a sine or cosine function.
  • a further rotation by multiples of 90 ° allow the determination of this periodic sine / cosine progression. If it is rotated further by angles smaller than 90 °, for example by 45 °, then it is necessary to continue rotating until the output shaft of the torque multiplier has rotated by 180 °. From the values thus obtained, a mean transmission ratio is then calculated and stored in the memory of the electronic torque wrench.
  • an advantageous embodiment of the method is the subject of the back claim to claim 6.
  • an interpolation curve in the first approximation, an interpolation straight line is set between the gear ratios determined in this way at different angular ratios, and the output torque is determined as a function of the input torque on the basis of this interpolation curve.
  • the device shown in the figure for generating a torque-accurate torque comprises a torque multiplier, in general Both the input and the output shaft each end, for example, with a square, to which acts in the case of the input shaft, a torque wrench 200 and the case in the case of the input shaft the output shaft 102 in a so-called "power nut” or simply “nut” 140 engages.
  • a torque multiplier 100 further includes a known reaction arm 130 which prevents the torque multiplier from spinning during the tightening operation by striking a stationary object.
  • the torque multiplier 100 is manually operated by a torque wrench 200.
  • the torque wrench 200 has a handle 210.
  • the torque wrench 200 itself is an electronic torque wrench 200 having a display 205 and an input device 220.
  • the input device 220 serves, for example, for inputting data characterizing the screwdriving process.
  • the adjustment of the torque wrench 200 via a selection menu. After selecting a menu item, the desired output torque and the desired limit values are entered.
  • an operator is visually informed of the progress, for example by means of light bars. Shortly before reaching the target torque, the operator can also be informed by an acoustic signal.
  • a likewise preferably optical and optionally also acoustic "okay” or “non-kay” display is performed and the torque value achieved is stored in a data memory provided in the torque wrench 200 (not shown). All values stored in the torque wrench can be transferred to a PC or laptop after completion of all work and further evaluated there.
  • the torque wrench is battery or battery operated.
  • the torque multiplier 100 or the transmission gear 110 of the torque multiplier 100 has an RFID transponder which cooperates with an RFID reader arranged in the torque wrench 200.
  • the torque wrench 200 effectively recognizes the torque multiplier 100 or the transmission 110 of the torque multiplier 100 and by resorting to values stored in the memory of the torque wrench 200 which were determined and stored in a common calibration to be described in greater detail below Torque values can be set exactly.
  • translation values are stored, which are each associated with the transmission 110 of the torque multiplier 100. These values are used in a computing unit provided in the torque wrench 200.
  • the combination of RFID transponder and RFID reader completely excludes system confusion.
  • Fig. 2 schematically a side view of the torque multiplier 100 is shown.
  • An input shaft 101 terminating in, for example, a square on which the electronic torque wrench 200 engages is engaged via the transmission 110 with an output shaft which also terminates with a square 102 which engages a keyed nut, also referred to as a "power nut" 140 ,
  • the power nut 140 is adapted on the output side to the screw head or to the nut of the screw connection.
  • the transmission ratio between input torque M E and output torque M A is determined by the transmission 110. It is first determined this gear ratio, wherein the input torque M E is determined by the electronic torque wrench 200, and the output torque M A is detected by a sensor 400 which is arranged on the output shaft. This sensor 400 is intended only for calibration. In later operation, the arrangement of such a sensor 400 is not required.
  • the determination of the transmission ratio now takes place in that the output shaft and thus the output square 102 are first brought into a first position, which corresponds to an angle of 0 ° ( Fig. 3b1 )). Then, the screw is "tightened" by the input torque M E is applied and the output torque M A is determined. This results in a functional relationship between the output torque M A and the input torque M E , the in Fig. 4 is shown schematically by a dashed line. In principle, such a series of measurements suffices for determining this functional relationship between the output torque M A and the input torque M E. In this case, the interpolation curve of the function M A (M E ) is then determined and this interpolation curve, in particular an interpolation straight line, as in FIGS FIGS. 4 and 5 represented, saved as a kind of characteristic.
  • a particularly advantageous embodiment of the method according to the invention provides further measurement series.
  • the output square 102 that is to say the output shaft, is rotated by 90 °, as shown on the right in FIG Fig. 3b2 ) is shown schematically and again the relationship between output torque M A and input torque M E is determined, in Fig. 4 shown as a solid line.
  • the interpolation curve (the straight line shown) is formed over the entire torque range.
  • the curve, as in Fig. 5 is divided, for example, into four sub-areas I, II, III, IV of the input torque M E is divided and an interpolation is performed in each of these sub-areas. Again, this results in a substantially linear course.
  • the number of these subdivisions can be further increased, so that in the limit case an exact approximation of the function M A (M E ) is possible.
  • the sensor 400 is removed and the dependence of the output torque M A on the input torque M E is - as mentioned - stored in the memory of the electronic torque wrench 200 and used in later schrauben. In this way, very accurately the tightening torque of screw can be determined.
  • the calibration over different angular ranges is required because all known types of transmissions have due to the engagement conditions of the tooth flanks more or less sinusoidal fluctuations in the torque curve and thus the force curve. This means that over the entire torque curve of the torque multiplier deviations from theoretically calculated torque are detectable. Due to the calibration, these deviations can be taken into account and eliminated.
EP11779553.4A 2010-05-06 2011-05-03 Vorrichtung zur erzeugung eines drehmomentgenauen anzugsmoments für schraubverbindungen Not-in-force EP2566660B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11779553T PL2566660T3 (pl) 2010-05-06 2011-05-03 Urządzenie do wytwarzania dokładnego dynamometrycznie momentu dokręcającego do połączeń śrubowych

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010019792A DE102010019792A1 (de) 2010-05-06 2010-05-06 Vorrichtung zur Erzeugung eines drehmomentgenauen Anzugsmoments für Schraubverbindungen und Verfahren zur Kalibrierung einer solchen Vorrichtung
PCT/DE2011/001020 WO2012019575A1 (de) 2010-05-06 2011-05-03 Vorrichtung zur erzeugung eines drehmomentgenauen anzugsmoments für schraubverbindungen

Publications (2)

Publication Number Publication Date
EP2566660A1 EP2566660A1 (de) 2013-03-13
EP2566660B1 true EP2566660B1 (de) 2018-07-11

Family

ID=44802908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11779553.4A Not-in-force EP2566660B1 (de) 2010-05-06 2011-05-03 Vorrichtung zur erzeugung eines drehmomentgenauen anzugsmoments für schraubverbindungen

Country Status (9)

Country Link
US (1) US20130047799A1 (pt)
EP (1) EP2566660B1 (pt)
CN (1) CN103003027B (pt)
BR (1) BR112012028314A2 (pt)
DE (1) DE102010019792A1 (pt)
ES (1) ES2690170T3 (pt)
PL (1) PL2566660T3 (pt)
RU (1) RU2530182C2 (pt)
WO (1) WO2012019575A1 (pt)

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TW201441594A (zh) * 2013-04-16 2014-11-01 Huang Kuan Auto Control Equipment Co Ltd 扭力測試裝置
JP6416881B2 (ja) * 2013-04-24 2018-10-31 ハイトーク ディビジョン ユネックス コーポレイション ねじ山付きファスナを締め付ける装置
US9242356B2 (en) 2013-05-07 2016-01-26 Snap-On Incorporated Method of calibrating torque using peak hold measurement on an electronic torque wrench
US9156148B2 (en) * 2013-05-10 2015-10-13 Snap-On Incorporated Preset electronic torque tool
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CN107505073B (zh) * 2017-08-10 2020-04-17 成都楠迪科技有限公司 便携式智能扭力测试系统及测试流程
DE102017008859B3 (de) * 2017-09-21 2018-11-29 Alki Technik Gmbh Schraubsysteme Entwicklung-Produktion-Vertrieb Kalibrierverfahren für einen Kraftschrauber
CN107782489A (zh) * 2017-10-16 2018-03-09 郑州拽亘电子科技有限公司 螺栓模拟器及使用该模拟器的扭矩板子检定装置
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Also Published As

Publication number Publication date
CN103003027B (zh) 2016-08-03
RU2012152452A (ru) 2014-06-20
PL2566660T3 (pl) 2019-02-28
RU2530182C2 (ru) 2014-10-10
CN103003027A (zh) 2013-03-27
DE102010019792A1 (de) 2011-11-10
US20130047799A1 (en) 2013-02-28
BR112012028314A2 (pt) 2016-11-01
EP2566660A1 (de) 2013-03-13
WO2012019575A1 (de) 2012-02-16
ES2690170T3 (es) 2018-11-19

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