CN106975723B

CN106975723B - Slip identification

Info

Publication number: CN106975723B
Application number: CN201611178159.8A
Authority: CN
Inventors: A.沙尔芬贝格
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2015-12-17
Filing date: 2016-12-19
Publication date: 2021-06-08
Anticipated expiration: 2036-12-19
Also published as: EP3181260B1; CN106975723A; EP3181260A1

Abstract

The invention relates to an intelligent hand-held rivet setting device, which is provided for: data for force-displacement curves (28) detected by means of sensors are provided and these curves are compared with one another in order to deduce from the comparison the action of a particular said rivet setting tool. In particular, a slip of the rivet mandrel or a subsequent analysis, recording and documentation of the quality of the rivet connection can be obtained in this way.

Description

Slip identification

Technical Field

The invention relates to a Hand-held blind rivet setting device (Hand-held blind rivet setter ä t) and to a method for operating the same.

Background

Blind rivet setting appliances are known from the prior art. To establish the connection, blind rivets are used together with a setting device (Setzger ä t).

Blind riveting is a mechanical joining method in which a blind rivet is inserted into preformed holes in two components to be joined and an instrument is placed with the blind rivet and plastically deformed. The blind rivet is deformed by a rivet mandrel (Nietdorn) which is drawn by a blind rivet setting tool. Once the deformation is complete, the rivet mandrel is removed at a predetermined breaking point. In this way, a force-locking connection of the two components is produced. The blind rivet thus comprises two parts, namely a rivet bush and a rivet mandrel.

Industrial blind rivet setting tool arrangements are usually realized by means of the following means: a control means (e.g., a base station or a rivet controller) for one or more rivet setting tools, a power component depending on a power output request for the rivet setting tool, and one or more rivet setting tools. The rivet setting device generally comprises at least one pulling device (zugvorrichhtung) for pulling the rivet mandrel, which can be driven (pneumatically, hydraulically, electrically) by means of a drive. The rivet mandrel is held during the setting process by means of the jaws. During setting, the jaws may slip more or less strongly over the rivet mandrel. With greater wear of the jaws and more severe contamination of the riveting equipment, the frictional contact is reduced and the slip (Schlupf) between jaws and rivet mandrel is increased. This may even result in: if the contamination of the rivet mandrel is too great, it is no longer sufficiently gripped by the jaws and the rivet mandrel can therefore no longer be removed from the rivet sleeve.

It is desirable to identify the state of such a worn device in a timely manner in order to prevent quality-defective riveted connections. It is also preferred that the rivet setting device can be operated autonomously, i.e. without the requirement of a superordinate control mechanism.

Disclosure of Invention

According to the invention, an electric hand-held rivet setting device and a method for operating such a hand-held rivet setting device are proposed. Advantageous embodiments include: wherein the first force-displacement curve is temporarily provided as a reference curve for comparison, in order to compare a further provided force-displacement curve with the reference curve; wherein a plurality of force-displacement curves for comparison are temporarily provided in order to compare the force-displacement curves detected one after the other in the order of detection with one another; wherein it is provided that a tolerance range is taken into account in the comparison process, which tolerance range defines an allowed comparison tolerance; wherein the tolerance range can be defined piecewise along the force-displacement-curve to provide a plurality of tolerance curves independent of one another along the force-displacement-curve; wherein it is provided that the force/displacement curve diagram is evaluated with respect to its geometric properties within the tool by means of a rivet tool control mechanism comprised by the hand-held rivet setting tool; wherein, in order to detect a slip between the jaws and the rivet mandrel during the pulling process, the force-displacement curves provided one after the other are compared with one another in order to determine a trend, i.e. a change in displacement and/or force; wherein user prompts are specified as actions with regard to: a rivet mandrel slip or a movement of the force-displacement-curves in relation to each other in the force direction and/or in the displacement direction and/or relative to a reference curve of the hand-held rivet setting tool; wherein as an action provision, the operation of the hand-held rivet setting tool or the operation of the various hand-held rivet setting tool functions is controlled as a function of the comparison result; wherein as an action provision the operation of the traction means is regulated depending on the result of the comparison; wherein the hand-held rivet setting device has a removable battery; wherein a staggered transmission is provided between the drive and the traction means; wherein slippage is identified within the range of the maximum vertically dispersed width of the riveting curve and a maintenance cue is caused as an action; wherein the tolerance range can also be defined individually for all individual value pairs of force and displacement, in order to provide a plurality of tolerance curves that are independent of one another along the force-displacement curve; wherein it is provided that the force/displacement curve diagram is evaluated within the device with respect to the steepness of the selectable diagram segments or for identifying a curve representing the riveting characteristic by means of a rivet device control which is comprised by the hand-held rivet setting device; wherein provision is made for the user prompt to be presented on a display device, the hand-held rivet setting appliance itself comprising the display device; wherein as an action provision a release or locking of the hand-held rivet setting device is caused; wherein as an action provision is made to change the tractive force as a function of slip; wherein as an action provision is made for the tractive force to be increased and/or decreased as a function of the slip. In addition, advantageous embodiments are also the subject of the following description.

The hand-held rivet setting appliance is an appliance having a housing with the features of the claimed invention. The appliance is provided as an automatically measuring and process monitoring appliance having a fully integrated appliance control mechanism. This means that the device automatically monitors the placement process performed by the device and preferably also qualitatively evaluates the placement process, without the need for a higher-level control unit.

The device is designed such that it can be easily held in the hand and can therefore be easily transported and carried as a compact and self-closing device. Preferably, a battery operating mechanism is provided, which makes the appliance independent of an external energy supply mechanism. The housing preferably also comprises means for automatically discharging the removed rivet mandrel after the setting process, so that the removed rivet mandrel can be reliably discharged to a rivet mandrel receptacle likewise arranged on the tool by means of a rivet mandrel discharge mechanism configured in the form of a channel, independently of the current position of the tool. Preferably, the rivet mandrel discharge mechanism is realized by means of an air flow.

The rivet setting device is provided according to the invention for: force data relating to the pulling force exerted on the rivet mandrel during the setting process, detected by means of the electronics and sensor device inside the device, and displacement data relating to the displacement undergone by the rivet mandrel during the setting process, detected by means of the electronics and sensor device inside the device, are recorded and stored inside the device, so that a force-displacement data set is provided by the device for each setting process performed by the device, which force-displacement data set in particular also allows a graph relating to the force-displacement curve to be shown after the setting process, but also during the setting process. The abscissa of the coordinate system used to represent the diagram preferably corresponds to the displacement, and the ordinate of the coordinate system preferably corresponds to the force. Alternatively, it is also possible for this purpose to plot the force on the abscissa of the coordinate system and the displacement on the ordinate thereof. The data are stored as force-displacement-data pairs in an appliance memory inside the appliance and linked to the associated setting process.

The rivet setting tool comprises a comparison device, preferably implemented using a computer, on a tool control, on which a software can be run, which can carry out the comparison. The comparison device is configured to: at least two existing force-displacement curves are compared with one another, which can be assigned to different setting processes, and from the comparison results, an action specific to the rivet setting device is derived.

By suitable evaluation of the force-displacement curve, a required replacement or a required cleaning of the rivet setting device can be automatically and timely identified and displayed by the rivet setting device.

The data pairs, which are automatically assigned to one another by the instrument and which consist of force data and displacement data, which are detected by the sensor during the setting process and represent a diagram of the setting process, form a curve profile (Kurvenverlauf), which is also referred to as a riveting curve. This makes it possible to monitor the wear by means of software by analyzing the course of the curve and to monitor the contamination of the tool components enclosed by the housing of the rivet setting tool, in particular of the means for holding and/or pulling the rivet mandrel. In particular, the clamping mechanism is generally subject to a high degree of contamination, for example due to metal wear of the rivet mandrel during the setting process.

By means of such an active self-monitoring, which is carried out automatically by the appliance, a reduction of the cleaning and maintenance intervals can be ensured with a high reliability of the riveting process.

In the first appliance operating mode, the first force/displacement curve is temporarily provided as a reference curve for comparison with all other force/displacement curves. The reference curve preferably results from a reference rivet setting process which is provided shortly after the start of a new, old or recently repaired or cleaned rivet setting tool. The reference curve provides an evaluation measure for the state of the components inside the appliance for all subsequent placement processes. In a second setting operation, i.e. a setting operation following the reference rivet setting operation, a second force/displacement curve is detected and is provided in the tool memory, preferably including a link to the respective setting operation. In a further subsequent setting process, this is repeated for each of these setting processes, i.e. the force/displacement curves detected during the setting process are likewise detected by the sensor device and stored in an instrument memory and are preferably linked to the setting process, so that a large number of force/displacement curves can be compared with the reference curve and stored in the instrument memory for comparison purposes with the reference curve. The storage in the appliance memory is preferably effected by means of a database, but can also be effected in a privately owned manner. Within the scope of the comparison, the further the detected force-displacement curve deviates from the reference curve, the more the state of the components inside the appliance changes since the reference rivet setting process. This can be a sign of a pending maintenance or cleaning operation on the assembly, which the appliance user should know.

In a second appliance operating mode, which is provided as an alternative or in addition, a large number of force/displacement curves are temporarily provided for comparison with one another. In contrast to the reference rivet setting process, the force-displacement curves provided in succession one after the other during each setting process are in this case compared with one another in succession, i.e. the currently provided force-displacement curve is correspondingly compared with the previous force-displacement curve, and so on. The comparison results of all the comparisons carried out to date are regarded as indicators for maintenance or cleaning operations that may be pending on the component. The rivet setting operation preceding the current rivet setting operation therefore represents a temporary reference curve, which is, however, replaced by the current rivet setting operation after the end and comparison with the current rivet setting operation. For an upcoming rivet setting process, the currently finished rivet setting process then again functions as a temporary reference curve, and so on. In this case, several X-force/displacement curves, so-called rivet curves, are observed retrospectively one after the other, and the action is deduced if there is a recognizable continuous displacement lengthening or continuous force increase during the associated rivet setting process, and thus a worsening of the tendency of the state of the device can be seen by the operator. In particular, it is also possible, if the computer is used, to study the force-displacement curves with respect to the movement of the graphs defined by means of the force-displacement data, in particular by means of a comparison of the graphs with one another along the force direction and/or the displacement direction, as a function of the chronological sequence which provides a plurality of force-displacement curves which follow one another, preferably stored within the appliance.

Triggering the action, preferably in a defined and tolerance-dependent manner, enables a change in the force/displacement curve, which does not imply an internal change in the component or is tolerable, to be faded out (ausblenden) when triggering the action. By means of the assignment of particularly preferred subsections of the tolerance range, all specific sections of the force/displacement curve can be deliberately faded out and faded in when the action is triggered.

In a preferred operating mode of the device, it is provided, in particular, that the force/displacement curve diagram is analyzed, preferably within the device, with respect to the geometric properties of the force/displacement curve by means of a device control unit comprised in the device, in particular with respect to the steepness of a preferably selectable diagram segment or to detect a jagged curve on the diagram. It is further preferred that a curve discussion or other mathematical analysis is also carried out on the diagram itself, which curve discussion or other mathematical analysis allows a retrospective conclusion to be made about the setting process on which the diagram is based.

It is particularly advantageously provided that, as long as the jaws grip the rivet mandrel, a slip between the jaws of the rivet setting device and the rivet mandrel during the pulling process is detected by means of the comparison. The length of the displacement occurring during the setting process up to the removal of the rivet mandrel and the traction force applied there allow a slip to be inferred between the jaws and the rivet mandrel. For example, the longer the displacement, the greater the slip. This may imply that the jaws are contaminated, in which case the flutes for gripping the rivet mandrel become contaminated with material deposits and thus become less slip-resistant.

Preferred actions are user prompts which are specified in particular with regard to the following: a slip of the rivet mandrel or a displacement of the force/displacement curve relative to one another in the force direction and/or in the displacement direction, wherein provision is made, in particular, for the user indication to be displayed on a display device, preferably comprising the rivet setting device. The worker is thus alerted early and can replace the appliance or send it to inspection at the next shift. The worker can take immediate action by himself as the urgency of the current appliance status.

The action is preferably transmitted to a remote authority, for example to a central service server or the like, by means of a network connection comprised by the rivet setting device. This is done according to the invention and more precisely preferably wirelessly, for example by means of WLAN or bluetooth. Such a host can then take action immediately. For example, it is preferably provided that the rivet setting device or the individual device functions can be controlled as a function of the comparison result, for example can be released or locked for further operation. This can be achieved by means of a network connection, for example also from a remote location.

It is particularly advantageous if the traction means can be adjusted as a function of the comparison result, so that the traction force can be varied, preferably as a function of the slip. These measures enable: in the event that a state of wear or a state of contamination is already clearly observable, the operation of the rivet setting device can nevertheless be continued without loss of quality in respect of the riveted connection, since these states can now be easily controlled and the worker can thus easily end a work shift still in progress without interruption, for example.

The advantages mentioned above also apply to the computer-implemented method according to the invention. It is clear that the features mentioned above and those yet to be explained below can be used not only in the respectively specified combination but also in other combinations or individually without departing from the scope of the invention.

Drawings

The invention is schematically illustrated in the drawings by means of embodiments and described in detail with reference to the drawings. In the figures, identical or functionally identical features are provided with the same reference symbols, unless otherwise stated.

Fig. 1 shows a rough schematic representation of an appliance according to the invention;

fig. 2 shows a roughly schematic illustration of a riveting curve;

fig. 3 shows a section of the riveting curve roughly schematically;

fig. 4 shows the steps of the method according to the invention.

Detailed Description

The riveting tool shown in fig. 1 is used for setting a blind rivet or blind nut consisting of a rivet sleeve and a detachable rivet mandrel. To a battery appliance for hand-held operation. Fixed appliances are likewise conceivable. An appliance head 10 is provided having a mouth for holding the rivet mandrel. The tool head 10 and/or the force sensor 9 with the rivet mandrel sleeve and/or the trapezoidal or spherical rotary spindle 7 with the rivet mandrel sleeve and/or preferably the rivet mandrel receptacle 12 are arranged next to one another along a common axis. After its removal, the rivet mandrel clamped in operation by the jaws of the nozzle is discharged by means of a rivet mandrel discharge channel (not shown) through the

aforementioned components

10, 9, 7 by suitable movement or ventilation of the riveting tool to the rivet mandrel receptacle 12.

The trapezoidal or spherical rotating spindle 7 is driven by means of an electric motor 5, preferably in combination with a transmission 6. A displacement sensor 8 is arranged on the trapezoidal or spherical spindle 7, which displacement sensor detects the displacement traveled by the trapezoidal or spherical spindle 7 directly or indirectly by means of the angle of rotation traveled by the trapezoidal or spherical spindle 7. Alternatively, the displacement sensor 8 can also be arranged on the motor 5 and detect its rotation angle.

Reference numeral 11 denotes an appliance control mechanism 11 with a communication module and a display (not shown) inside the appliance, which can also be at least partially enclosed by the housing of the riveting tool. The rivet mandrel receptacle 12 may also be at least partially surrounded by the same housing.

The entire arrangement mentioned above is supplied with power by means of the battery 1, for which purpose a cable harness 3 is provided, which extends inside the housing. The start switch 4 is used to switch the rivet apparatus on and off. Reference numeral 2 denotes an interface with power electronics for operating the motor 5.

In this preferred embodiment, at least the

components

2, 3, 5, 6, 7, 8, 9 are completely enclosed by the housing of the riveting tool, preferably also the tool control 11. The tool control device 11 can, without a superordinate control device, control or regulate or record or analyze the rivet setting process in a completely autonomous process-safe manner. The appliance control 11 is connected to the

sensors

8, 9 in such a way that it can store the data quantity which is continuously provided by the sensors during the setting process. For this purpose, the force/displacement data are stored in a force/displacement data memory 13 inside the device. The appliance control means 11 may comprise the force-displacement-data memory 13. The appliance control 11 may likewise comprise a comparison device 14 for force/displacement data. Preferably, the appliance control means 11 is a microprocessor, in particular with a real-time operating system, wherein the appliance functions including comparison and rivet curve analysis are preferably implemented by means of a computer-implemented program stored in the appliance memory and executable on the microprocessor or operating system. By means of such a program, the method according to the invention is implemented as required, preferably by means of program threads which can be run separately.

The quality analysis of the riveted connection can also be carried out taking into account the reference data set and/or the force-displacement data set. In the display of the preferred device control 11, in addition to the pure OK/NOK information (OK = no fault, NOK = fault), the force/displacement curve or the evaluation results relating thereto are also visually displayed to the user. The rivet setting device according to the invention is designed such that it can also transmit the riveting curve to the superordinate mechanism. Such mechanisms use a monitor for display purposes. The preferred solution presented here allows the force-displacement-diagram of each individual riveted connection to be evaluated later, said riveted connection being realized inside the production line. It is also possible to assign the riveting curve to the individual components within the tool, for which purpose the rivet setting tool according to the invention is provided for connection to a complex component database. Such a database can preferably also be stored in the appliance memory.

In order to implement the rivet slip detection, the invention provides different strategies which can preferably also be combined with one another by the appliance user.

In a first variant, the reference curve must be obtained by means of a reference rivet setting process and can preferably be provided with tolerances. The reference curve can also be read in or manually entered on the device and tolerances can likewise be entered. Alternatively, the individual points of the reference curve can be edited, for example by means of an operating device comprised by the appliance, with a keyboard and a display. A second variant enables operation without a reference curve by: the riveting curves are compared with one another in order to determine a trend, i.e. a change in displacement and/or force.

In an additional third variant, a maximum tolerance band can also be predefined for the amplitude of the permitted irregularity of the course of the riveting curve, in particular for detecting jagged curves or discontinuities of a jump-like shape, which may also indicate mechanical faults. Particularly preferably, the rivet setting device according to the invention is provided for automatically detecting a saw-tooth curve within the riveting curve. This function can optionally be selected on the rivet setting device according to the invention. The amplitude of the saw-tooth curve on the riveting curve can also indicate a slip of the rivet mandrel between the jaws, i.e. a slip can also be recognized within the permitted, in particular maximum, vertical dispersion width of the riveting curve and cause a maintenance prompt as an action. Depending on the maximum permissible tolerance curve or tolerance section for the riveting curve in the displacement direction or in the force direction, which can preferably be predefined, a limit curve for the displacement or force can be predefined. If this limit curve is exceeded, the riveting result can always still be OK, but the riveting device preferably gives a maintenance prompt. Each individual riveting curve point may preferably be provided with a unique tolerance deviation.

Fig. 2 shows, roughly schematically and completely generically, a riveting curve 28 (force-displacement curve) which is provided by the blind rivet setting tool during blind rivet setting. In particular, it can be seen in the graph that: the beginning of the riveting process 21; followed by a bending of the rivet bush 22 (force peak and subsequent disturbance); pushing the plates together by rivets 23 until the plates rest on each other 24; and a force rise 25 in the riveted connection itself, which further presses the plates together until a maximum force 26 and the rivet mandrel breaks 27 at its predetermined breaking point, including the serrated region 30. The displacement that has elapsed up to the break is plotted on the ordinate, and the corresponding force that has acted on the rivet mandrel is plotted on the abscissa. These data originate from the appliance-

sensing devices

8, 9.

Fig. 3 shows a roughly schematic illustration of the riveting curve of fig. 2, wherein a tolerance window is predefined around the sawtooth region 30. The tolerance window results in: a sawtooth that is within the tolerance window does not cause an action, only a curve that is outside the tolerance range triggers an action. The limit curve section in the force rise region 24 is likewise shown. The limit curve section 29 leads to: the curve lying within the limit curve section 29 does not cause an action, only the curve to the right of the limit curve section 29 triggers an action.

Fig. 4 shows the main steps of the method according to the invention, namely the detection of the displacement traversed by S0; detecting S1 an applied force dependent on the displacement; providing S2 a first force-displacement curve by pairwise assigning values of a first force data set to values of a first displacement data set, the first force data set being assignable to a first placement process, the first displacement data set also being assignable to the first placement process; and providing S3 a second force-displacement-curve by assigning values of a second force-data set to values of a second displacement-data set, the values of the second force-data set being assignable to a second placement process, the second displacement-data set being assignable to the second placement process; and comparing the two force-displacement-curves with each other S4 and deriving S5 actions from the comparison result. The method is implemented by means of a program that can be run on the appliance control unit 11 and can preferably be called wirelessly by the rivet setting appliance from an internet server (intersettverer). The program update is performed automatically according to the user's wishes or according to the button pressure of the rivet setting tool itself.

List of reference numerals:

1 accumulator

2 battery interface with power electronics

3 Cable bundle

4 starting switch

5 Motor

6 drive mechanism (with offset)

7 trapezoidal/spherical rotating main shaft and mandrel guiding mechanism

8 displacement sensor

9 force sensor with rivet mandrel sleeve

10 rivet arrangement for holding a rivet mandrel

11 control electronics/communication mechanism/display

12 rivet mandrel container

13 force-displacement-data memory

14 comparator for force-displacement data

21 initiation of the riveting Process

22 bending of rivet bush

23 the plates are pushed together

24 plates put together

25 elastic and plastic force rise

26 maximum force

27 fracture of riveting mandrel

28 force-displacement-curve, graph, riveting curve

29 tolerance range

30 jolt, saw tooth

Method steps S0 to S5.

Claims

1. An electrically powered hand-held rivet setting tool for setting a riveting device having a removable rivet mandrel, the hand-held rivet setting tool comprising: an implement head (10) having a mechanism for gripping the rivet mandrel; a pulling device (7) for pulling the rivet mandrel; and a drive (5) for driving the traction device (7), wherein a transmission (6) is provided between the drive (5) and the traction device (7), wherein a first sensor (8) for detecting a displacement passed through is arranged in the hand-held rivet setting device, such that the displacement passed through of the traction device (7) can be detected by means of the first sensor (8), and a second sensor (9) for detecting an applied force is arranged in the hand-held rivet setting device, such that the traction force applied by the traction device (7) can be detected by means of the second sensor (9), wherein the hand-held rivet setting device is provided for: providing (13) data for the first force-displacement-curve and the second force-displacement-curve, said data being detected by means of the first sensor (8), the second sensor (9); and comparing (14) the two curves with one another and deriving an action from the result of the comparison, wherein the tool head (10) comprises jaws for clamping the rivet mandrel, which jaws can be actuated by means of the pulling device (7), wherein provision is made for a slip to be obtained as an action between the jaws and the rivet mandrel during the pulling process, wherein the hand-held rivet setting tool for rivet slip recognition is provided for automatically recognizing a jagged curve inside a riveting curve which indicates a slip of the rivet mandrel between the jaws, wherein a slip is recognized within the permitted range of vertical dispersion width of the riveting curve and a maintenance cue can be brought about as an action, and wherein a limit curve for displacement or force can be specified, each individual riveting curve point can be provided with a unique tolerance deviation.

2. A hand-held rivet setting tool according to claim 1 wherein said first force-displacement-curve is temporarily provided as a reference curve for comparison to compare an additional provided force-displacement-curve with the reference curve.

3. A hand-held rivet setting tool according to claim 1, wherein a plurality of force-displacement curves for comparison are temporarily provided so that the force-displacement curves detected one after the other are compared with each other in the order of detection.

4. A hand-held rivet setting tool according to any of the preceding claims 1 to 3, wherein it is provided that a tolerance range (29) is taken into account in the comparison process, which tolerance range defines the permitted comparison tolerance.

5. A hand-held rivet setting tool according to claim 4, wherein said tolerance range (29) can be defined piecewise along said force-displacement-curve to provide a plurality of mutually independent tolerance curves along said force-displacement-curve.

6. A hand-held rivet setting tool according to any of the preceding claims 1 to 3, wherein it is provided that the force-displacement-curve diagram is analyzed with respect to its geometry inside the tool by means of a rivet tool control means (11) comprised by the hand-held rivet setting tool.

7. A hand-held rivet setting tool according to any of the preceding claims 1 to 3, wherein in order to identify slippage between the jaws and the rivet mandrel during pulling, the force-displacement-curves provided one after the other are compared with each other in order to determine a trend, i.e. a change in displacement and/or force.

8. A hand-held rivet setting appliance according to any of the preceding claims 1 to 3, wherein user cues regarding: a rivet mandrel slip or a movement of the force-displacement-curves in relation to each other in the force direction and/or in the displacement direction and/or relative to a reference curve.

9. A hand-held rivet setting device according to any of claims 1 to 3, wherein as an action provision is made to control the operation of the hand-held rivet setting device or the operation of the various hand-held rivet setting device functions on the basis of the comparison result.

10. A hand-held rivet setting tool according to any of the preceding claims 1 to 3, wherein as an action provision is made for the operation of the pulling means (7) to be adjusted on the basis of the comparison result.

11. The hand-held rivet setting tool of claim 1, wherein the hand-held rivet setting tool has a removable battery.

12. A hand-held rivet setting device according to claim 1, wherein a staggered transmission (6) is provided between the driver (5) and the pulling means (7).

13. A hand-held rivet setting tool according to claim 1 wherein slippage is identified within the maximum vertically dispersed width of the riveting curve and a maintenance cue is caused to act.

14. A hand-held rivet setting tool according to claim 5, wherein said tolerance range (29) can also be defined individually for all individual value pairs of force and displacement, so as to provide a plurality of tolerance curves independent of one another along said force-displacement curve.

15. A hand-held rivet setting tool according to claim 6, wherein it is provided that the force/displacement curve diagram is analyzed within the tool with respect to the steepness of the selectable diagram sections or for identifying a curve (30) which represents the riveting characteristic by means of a rivet tool control (11) which the hand-held rivet setting tool comprises.

16. A hand-held rivet setting tool as claimed in claim 8, wherein provision is made for said user prompt to be revealed on a display device, said hand-held rivet setting tool itself comprising said display device.

17. A hand-held rivet setting device according to claim 9 wherein provision is made for causing the release or locking of said hand-held rivet setting device as an action.

18. A hand-held rivet setting tool according to claim 10 wherein said pulling force is modified as an action providing for slippage.

19. A hand-held rivet setting tool according to claim 18 wherein said pulling force is increased and/or decreased as an action provided in response to slippage.

20. A computer-implemented method for operating a hand-held rivet setting tool for setting a riveting device comprising a detachable rivet mandrel, the method having the following steps: detecting (S0) the displacement traveled by the rivet mandrel-pulling device in the form of displacement data during rivet setting; detecting (S1) a force applied by the rivet mandrel-pulling device in the form of force data during the setting process; providing (S2) the data as a first force-displacement-curve assignable to the placement process, and providing (S3) a second force-displacement-curve by detecting values of a second force-data set assignable to a second placement process and by detecting values of a second displacement-data set also assignable to the second placement process; comparing (S4) the two force-displacement curves with one another and deducing (S5) from the comparison a behavior specific to the hand-held rivet tool, wherein the tool head (10) comprises jaws for gripping the rivet mandrel, which can be actuated by means of the pulling device (7), wherein it is provided that a slip between the jaws and the rivet mandrel during pulling is detected as the behavior, wherein the hand-held rivet setting tool for rivet slip detection is provided for automatically detecting a saw-tooth curve within a riveting curve which indicates a slip of the rivet mandrel between the jaws, wherein a slip is detected within the permitted range of vertical dispersion width of the riveting curve and a maintenance indication is caused as the behavior, and wherein a limit curve for displacement or force can be specified, and wherein each individual riveting curve point can be provided with a unique tolerance deviation.

21. A method according to claim 20, wherein said first force-displacement-curve is temporarily provided as a reference curve for comparison with a number of further force-displacement-curves that can be provided by said hand-held rivet setting tool.

22. The method of claim 20, wherein said first and second force-displacement-curves are compared to each other.

23. A method according to any one of the preceding claims 20 to 22, wherein the hand-held rivet setting tool comprises jaws for gripping a rivet fastening device, and the jaws are operated by means of the pulling means (7) during setting.

24. A method according to claim 23, wherein a slip between the jaws and the rivet mandrel is obtained by means of said action, and said pulling means (7) is changed in dependence on the slip during said setting.

25. The method of claim 20, wherein slippage is identified within a maximum vertically dispersed width of the riveting curve and a maintenance cue is caused as an action.

26. The method of claim 22, wherein the first and second force-displacement-curves are compared to each other in chronological order of detection of the first and second force-displacement-curves.