Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Threaded fastener stress
Reexamination Certificate
1997-12-29
2001-05-22
Noori, Max (Department: 2855)
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
Threaded fastener stress
Reexamination Certificate
active
06234028
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus and process for tightening, installing or screwing a screw connection and, more particularly, to an apparatus for tightening or screwing a screw connection comprising a screwdriver device including a drive motor and a screwdriver spindle, a control device for controlling a torque, rotation speed, rotation angle, rotation direction, advance and/or tightening time of the screwdriver spindle and an operating device which includes an input and/or output device for setting up a predetermined tightening process program which is assembled in a modular manner from individual tightening program steps and which is used by the control device to control the screwdriver device. It also relates to a process including at least two steps for tightening or screwing a screw connection using this apparatus.
A screwdriver device is already known from German Patent Document DE 38 37 942 A1, in which the tightening or screwing process is composed from an arbitrary combination of tightening or screwing process steps by an operator. The screwing steps are input by an input device into a program memory, arranged in sequence in a tightening or screwing process program and are processed one after the other by the screwdriver controller. Listing the program result in extensive screwing or tightening programs, which are not easily understandable because of the sequential arrangement of tightening steps, especially with program branching steps. Changes or additions to the tightening or screwing process programs can be subsequently performed only with great effort or expense.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an apparatus and process for tightening a screw connection of the above-described type, which does not have the above-described disadvantages.
This object, and others which will be made more apparent hereinafter, is attained in an apparatus for tightening a screw connection comprising a screwdriver device including a drive motor and a screwdriver spindle and a control device for controlling tightening parameters such as a torque, rotation speed, rotation angle, rotation direction, advance and/or tightening time of the screwdriver spindle and an operating device which has an input/output in each instance output device for setting up a predetermined tightening or screwing process program which is assembled modularly from individual tightening process program steps and which is used by the control device to control the screwdriver device.
According to the invention the input and/or output device includes means for providing an input display, for example on a display screen, having a multi-dimensional field with a plurality of predetermined distinct field locations and means for associating the field locations with respective predetermined screwing process program steps.
The apparatus and process according to the invention has the advantage that it is comparatively easy to provide the tightening process with a tightening or screwing process program stored in a program memory and to perform subsequent changes and additions to it. The operator can easily get a subsequent overview of the programmed tightening process.
Advantageous features and improvements of the apparatus and the process according to the invention are possible and some of these features and improvements are included in the dependent claims appended hereinbelow. It is particularly advantageous that to correlate field locations in the input display to auxiliary locations, e.g. for documentation of the tightening process or for output or read off of information during the program operation. During operation of the program by the control device the auxiliary locations are processed together with the screwing or tightening process steps.
REFERENCES:
patent: 5493913 (1996-02-01), Layer et al.
patent: 5579453 (1996-11-01), Linderfelser et al.
patent: 38 37 942 A1 (1990-05-01), None
Bader Thomas
Klepsch Thorsten
Schindler Albrecht
Wahl Guenter
Noori Max
Robert & Bosch GmbH
Striker Michael J.
Thompson Jewel V.
LandOfFree
Apparatus and process for tightening a screw connection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and process for tightening a screw connection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and process for tightening a screw connection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2461985