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Method for screwing in screws with predetermined tightening torque

A technology for tightening torque and screws, which is applied to screwdrivers, wrenches, metal processing equipment, etc., to achieve the effect of shortening screw-in time and accurate tightening torque

Active Publication Date: 2021-02-09
STIWA HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The methods known from the prior art have the disadvantage that, in order to achieve the required tightening torque, the screw-in speed must be selected correspondingly low in compliance with the required tolerance range, in order to prevent dynamic effects that distort the tightening torque. The effect occurs based on the inertia of the drive train

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  • Method for screwing in screws with predetermined tightening torque
  • Method for screwing in screws with predetermined tightening torque
  • Method for screwing in screws with predetermined tightening torque

Examples

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Embodiment Construction

[0053] First of all, it should be maintained that in the different described embodiments the same parts are assigned the same reference symbols or the same component designations, wherein the disclosure contained in the entire description can be transferred according to the meaning to the same reference symbols or the same component designations. on the same part of the . Furthermore, the positional specifications selected in the description, such as eg top, bottom, side, etc., refer to the directly described and illustrated figures and in the event of a change in position, these positional specifications can be transferred to the new position as appropriate.

[0054] figure 1 A schematic diagram of a process screwdriver 1 is shown. A technical screwdriver 1 includes a motor 2 and a screw-in tool 3 coupled to the motor. The screw-in tool 3 can be coupled to a screw 4 or a nut so that a torque-transmitting connection between the screw-in tool 3 and the screw 4 can be produced...

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PUM

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Abstract

The invention relates to a method for screwing in a screw (4) with a predetermined tightening torque by means of a screw-in tool (3) coupled to an electric motor (2) driven by a regulator (8) control. The method comprises the following method steps: -accelerating the motor (2) to a predetermined maximum speed in the tightening direction (15); -driving the motor (2) at the maximum speed until the drive shaft (11) of the motor (2) has completed a predetermined amount - the rotating shaft of the motor (2) is rotated; - the speed of the motor (2) is reduced to a predetermined reduced speed; Threshold torque rise; - turn the screw (4) or nut further until the predetermined tightening torque is reached.

Description

technical field [0001] The invention relates to a method for screwing in a screw or nut with a predetermined tightening torque. Background technique [0002] Various methods are known from the prior art for producing a screw connection between two components. The methods known from the prior art relate in particular to production plants in which a screw or nut is screwed into a corresponding thread belonging to the respective screw or nut by means of a tool coupled to an electric motor in order to fix the component. In this case, the screw or the nut must be tightened with a predetermined tightening torque, the tightening torque to be achieved having only a small tolerance range. [0003] Methods for producing a screw connection between two components are known, for example, from WO 2008 / 093402 A1 and US 2013 / 056236 A1. [0004] The methods known from the prior art have the disadvantage that, in order to achieve the required tightening torque, the screw-in speed must be se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25B21/00B25B23/14B25B23/147
CPCB25B23/147B23P19/066B25B21/008B25B23/1475
Inventor M·布伦纳T·格吕克A·戈吕恩德尔A·库吉J·麦因加斯纳M·保迪茨
Owner STIWA HLDG