JP2019526451A5 - - Google Patents

Description

Molds and devices for positioning joining elements or for clinch joining Detailed Description of the Invention

[Background technology]
An apparatus for joining without using other elements, an apparatus for placing a joining element on a workpiece, or an apparatus for clinch joining (tightening joining) a workpiece are known in various embodiments. Each apparatus generally includes a punch unit having a drivable punch and a mold, and the workpiece can be disposed between the punch unit and the mold for processing.

According to the apparatus described above, functional elements or rivets, solid punch rivets, semi-hollow punch rivets and clinch rivets can be applied to the workpiece.
Depending on the joining operation, the workpieces to be processed, or other factors, various requirements need to be met by the device, in particular the mold. In the case of a mold having a mold part that moves during joining, it is more difficult to handle due to its structure, and the problem area becomes more complicated.

So far, the fact is that the latest or actual solution is not available as a solution for all the problems in this document.
[Objectives and Advantages of Invention]
The object of the present invention constitutes a practical improvement over conventional arrangements in modern environments where there is a high demand for continuous process control, especially in applications with high cycle rates or fully automated processing steps. It is to provide an apparatus and mold of the type described in the introduction.

The above object is achieved by means of the independent claims. The dependent claims relate to advantageous variants of the invention.
The present invention is based on a mold for an apparatus for joining, such as, for example, a punch rivet, a clinch or a clinch rivet.

  In the first aspect of the present invention, at least one monitor element for monitoring the functionality of the mold is attached to the mold. Therefore, it is possible to directly monitor the components, particularly the mold, and monitoring in a state or process having a significant meaning for the entire process is first expected. The monitoring element is designed to be adapted exactly as described above, in particular with regard to the function and / or structure of the mold.

Preferably, the monitoring element operates independently of the punch unit.
In order for the mold to function, it is necessary to apply a bonding force to the workpiece or rivet in the bonding process. An increase in force in the joining process occurs between the punch and the mold. The punch is movable with respect to the mold along the bonding axis of the mold or the bonding apparatus. The workpiece is positioned on the mold and / or supported on the mold.

  The monitoring element is preferably designed to continuously detect the condition or function of the mold and is designed to provide or communicate corresponding information. The monitor element is preferably a component separate from the mold, or a component provided integrally on the mold.

  The monitoring element is advantageously attachable or provided separately from or independently of the mold part exposed to wear. Thus, the monitoring element itself can be used over a long usable life or is protected from adverse effects.

  In particular, according to the present invention, in a simple manner, not only can the mold be “functioning” and “not functioning”, but also the mold can be identified before failure or before it fails. You can also.

  Providing information relating to the condition of the mold from the monitoring element to the periphery can be communicated, for example, to a monitoring unit or a higher unit such as a closed or open loop control unit and / or a warning or status signal It can be realized by various methods such as providing to the peripheral part of the system or the entire system.

The monitor element is designed, for example, to provide a detectable state and / or function with binary value information such as “good” or “bad”.
However, information can be provided by a monitor element that provides exactly one information content item selected from a plurality of items having different information contents. For example, various information content items may be provided to distinguish between states, such as “damage”, “wear”, “clogging”, etc., so that in each case a specific part and / or identification of the mold A statement for the function of is generated. For example, one information item may relate to the state and / or function of the movable mold part. Other information items allow, for example, an assessment of the condition and / or function of the positionally fixed mold part. Still other information items make it possible, for example, to derive conclusions regarding the state and / or function of the spring means of the mold.

The monitoring of the mold and the provision or transmission of information to the upper unit or the peripheral part may be continuous or may be performed at intervals.
The monitoring unit is preferably a computer-based monitoring unit that monitors, for example, a device with a mold for placing or joining the joining elements.

According to the invention, the monitoring element includes a strain gauge. Strain gauges allow space-saving, continuous and accurate monitoring of mechanically loaded mold elements. Since the strain gauge has a flat shape and is thin, the strain gauge can be stored on the mold without any problem. In particular, a contact for contact with the other contact of the wiring arrangement is provided on the strain gauge.

A plurality of strain gauges are preferably provided, but at least one strain gauge can particularly detect the stress in the second structure part or damage to the mold part coupled to the strain gauge. Deviations from standard characteristics can also be identified. Preferably, the strain gauge is coupled to a spring means that acts on, or in particular contacts, the movable mold part. If damage or malfunction occurs in the mold or the movable mold part and / or the spring means itself, the stress characteristic of the spring means detected by the strain gauge is affected.

In particular, if the movable mold part is damaged, the part of the spring means assigned to the damaged movable mold part behaves differently from the standard situation when it is not damaged. There is an effect that. This leads to non-standard stress conditions in the spring means, or non-uniform stress distribution in the spring means, which are outside the acceptable range. The non-uniform stress distribution at the spring means is preferably identified or detected by a plurality of strain gauges preferably attached to the spring means. The corresponding detection signal may be transmitted from the strain gauge to the upper unit.

According to the invention, the monitoring element includes exactly two sensors. Thus, reliable functional monitoring can be realized with relatively little expense. In particular, if the mold has two, three or four movable mold parts, in each case with one associated spring part of the spring means acting on them, preferably There are just two sensors or strain gauges, or just three or just four sensors or strain gauges.

The spring means comprises a plurality of elastically movable spring arms, one movable mold part being assigned to one spring arm. Preferably, a plurality of movable mold parts are provided on the mold, each mold part being in each case just one and the same part of the spring means, for example one spring arm of a multi-arm yoke spring Is acted upon by.

The mold comprises in each case four movable mold parts that are elastically movable by one spring arm of the spring means. Thus, the molds for the symmetric joints, in particular, the four mold parts that can warp radially outward with respect to the mold axis and the corresponding four springs that warp radially. And an arm. Preferably, the spring arm is formed of one of four bent and connected strip spring arms as a cross spring having four spring arms connected at one point. The mold preferably has a symmetrical structure.

According to another aspect of the invention, at least one monitoring element is attached to the mold for monitoring the joining process that is intended to be performed by the mold. Thus, regardless of the state of the mold, that is, whether it is a non-damaged or worn mold, it is possible to identify a state resulting from improper use of the mold.

For example, this may be the case when starting with a new or ideal mold and the workpiece or the various workpiece layers are placed diagonally or offset relative to the correct orientation or position on the mold. For example, this may cause the movable mold parts to exhibit non-uniform movement relative to each other and / or bend the elements of the spring means unevenly. This can be identified by the monitoring element, for example by comparing the actual characteristics with the characteristics of the set point, and can be assigned to the corresponding error.

In addition, advantageously, monitoring the joining process can lead to conclusions regarding the nature or nature of deformations performed on the workpiece, such as joining points. For example, in the case of clinch and clinch bets, conclusions can be drawn regarding the undercut of the work layer achieved at each junction.

It is further advantageous if the monitoring element is coupled to a mold part of a mold that undergoes movement caused by the joining process during joining, and the monitoring element specifically monitors the movement of the movable mold part. By coupling the monitor element to the movable mold part, the state of the movable mold part can be directly detected, and related information items can be provided reliably and with high information value. This is particularly advantageous because the movable mold part generally forms an important part of the mold. This is because the movable mold part is subjected to a relatively high load dynamically and mechanically. A movable mold part that functions without defects is a prerequisite for the mold to function. Thus, problems during joining are generally due to the movable mold part functioning incorrectly, or the movable mold part being damaged or not present at all. Thus, problem identification is performed in an advantageous manner using the mold according to the invention.

The coupling of the monitoring element to the mold part of the mold shall be understood to mean various relationships which are respectively adapted to each mold in a way depending on the situation. Coupling may mean, for example, physical coupling or indirect coupling between the monitoring element and the mold part. Furthermore, the bond may be permanent or non-permanent. It is also conceivable that the characteristics of the bond change during the joining process. For example, an indirect coupling between the monitoring element and the movable mold part is formed in the initial operating stage of the mold, and a direct coupling is, for example, between the monitoring element and the mold part. It is formed at a later time by contact.

The coupling is, for example, an abutment between the monitor element and the movable mold part, and the monitor element is arranged so that the abutment occurs when the movable mold part passes through a predefinable travel path. Is composed. This predefinable travel path provides particularly useful information regarding mold failure and possible damage conditions. The travel distance of the mold part monitored by the bonding is preferably the last part of the travel by the movable mold part in the joining process until reaching the end position or stop position of the movable mold part. . Mold damage can usually be distinguished from the fact that the travel of the movable mold part deviates from the standard travel that has been covered. Related deviations are identified from the mold according to the invention by the monitoring element.

It is also advantageous for the monitoring element to be coupled to a mold part of the mold that is movably provided in the mold.
In case of damage, the movable mold part may not reach the correct or standard end position, for example in the final part of the travel path, or may not stop at the end position and stop before and after the end position, Or, there may be non-standard movements or incorrect movements, for example, faster, slower, or jerky movements that are not uniform compared to a functionally correct standard situation.

For example, when a mold is damaged, one or more movable mold parts may move beyond the end position, which is the correct end position of the mold part travel path in the absence of damage.
  The movable mold part acts on the movable segment of the mold that interacts with the workpiece and / or on the movable segment of the mold, eg, yoke spring, elastomeric ring, or other mechanical It may be part of a spring means, such as a spring.

It is further advantageous if the monitoring element is coupled to the second structure part and the second structure part interacts with the mold part of the mold that is movably provided on the mold. The second structural part is formed, for example, by a spring means that provides a force or moment to the movable mold part. For example, the second structure part includes a part that is movably provided on the mold itself. The second structural part is preferably relatively easily accessible on the mold, for example forming a region outside the mold or attached to the outside of the mold part.

In one advantageous embodiment of the invention, the monitoring element comprises a sensor arrangement. The sensor arrangement allows the mold to be monitored in an economically advantageous manner, for example using commercially available sensors. In particular, various parameters of interest for function monitoring can be reliably detected, and can be transmitted, for example, to a host unit by wire.

Alternatively or additionally, the monitoring element advantageously comprises a force sensor, for example a piezo element.
It is further advantageous if the monitoring element comprises a sensor that serves to continuously provide a measurement signal, such as a strain gauge, that monitors the functionality of the mold and / or the bonding process that can be performed by the mold. is there. This makes it possible to reliably monitor the mold and the process throughout the joining process. A defect in the mold or a defect in the joining process is also quickly identified. Thus, a wider range of technical damage or economic loss can be removed.

A further advantage of the present invention arises when the monitoring element is configured to provide an associated measurement signal when a mold part coupled to the monitoring element is subjected to a load that is outside the range of normal load conditions. This generates a measurement signal at least when the mold is in a critical situation, which generally means that the joining process is in a critical situation. In this way, a malfunction or failure of the mold is identified. Preferably, further actions or measurements can be initiated automatically by the measurement signal. Thereby, the reliability of a process can be improved.

It is also advantageous that the monitoring element is designed to provide a measurement signal to the upper unit. The upper unit is preferably a process control monitoring unit, for example. The measurement signal is provided in particular as an electrical signal. By means of the upper unit, predefined follow-up measures can be started quickly and effectively.

In a further advantageous variant, the monitoring element comprises a plurality of sensors. Preferably, a plurality of individual sensors of the same type, i.e. a plurality of identical sensors, are provided. This is particularly advantageous when the mold has a symmetrical structure. This is because deviations from the symmetry of the movement profile can be identified. For example, a plurality of symmetrically arranged portions of the movable mold part perform the same movement during the joining process under standard conditions. Damage or failure of some of the parts of the movable mold part is more advantageous for the sensor, for example as a deviation from the standard situation or standard characteristics assigned to each part to which the sensor is attached. Can be detected. Each part behaves differently than under standard conditions or differently from other or undamaged parts of the movable mold part.

This applies to the fixed mold part as well, and this damage can be identified if the fixed mold part is damaged.
For example, a plurality of strain gauges are provided on the mold, and in particular in each case one associated sensor is provided for each movable mold part. In addition or alternatively, each associated sensor may preferably be provided for each spring element of the spring means comprising a plurality of spring elements.

For example, a strain gauge and / or a piezo element may be used as the sensor.
It is also advantageous for the monitoring element to contain exactly three or just four sensors. Thereby, it is possible to monitor a relatively complicated mold having a plurality of fixed mold parts and / or a plurality of movable mold parts with high information value.

The mold advantageously has a movable mold part that interacts with spring means for resettable movement. Thus, precisely repeated movements and attachments of movable mold parts, such as mold segments, can be defined in advance.

According to another advantageous variant of the invention, the mold has spring means with spring arms that can be elastically deflected. The spring arm can be housed compactly or have different stages of action depending on the dimensions and material specifications.

  The invention further extends to a device for placing a joining element on a workpiece or for clinch joining of a workpiece, the device comprising a punch unit and a mold unit arranged on the opposite side, A workpiece that can be machined by the apparatus can be firmly clamped between a punch unit and a mold unit, the mold unit including a mold according to one of the above-described embodiments. The apparatus according to the present invention is, for example, a clinch tool or a rivet tool having a C-shaped bracket, an O-shaped bracket, or a columnar frame, on which a punch unit and a mold located on the opposite side are provided. is there. The apparatus can be suitably used, for example, for processing rivets such as clinch rivets and / or clinching and clinch joining.

Further features and advantages of the invention will be explained in more detail below on the basis of the arrangement according to the invention shown in the drawings.
It is a figure which shows typically the detail of the conventional clinch apparatus which has a two-layer workpiece | work at the time of a clinch process start, and the components of a clinch apparatus are abbreviate | omitted. 1 illustrates the arrangement of FIG. 1 at the end of the clinching process. Fig. 3 illustrates the processed workpiece of Fig. 2 after the clinching step. The mold according to the invention is illustrated by a side view. The mold of FIG. 4 is illustrated by a longitudinal sectional view. The mold of FIG. 4 is illustrated from above. The insert of the metal mold | die of FIG. 4 seen from diagonally downward is illustrated with a perspective view. FIG. 5 shows alone the spring means of the mold of FIG. 4 with a monitoring element.

  FIG. 1 very schematically illustrates a conventional device 1 for clinching or clinching a workpiece 4 just before the deformation process of the workpiece 4. The clinching device 1 has a mold 3 disposed on the opposite side of the punch unit 2, and the workpiece 4 is positioned on the mold 3 between the punch unit 2 and the mold 3, Or it is arranged. The work 4 has an upper work layer 5 on its punch side and a lower work layer 6 on its mold side. In each case, the work layer 5 and the work layer 6 are, for example, plastically deformable metal plates. The two work layers 5 and 6 are deformed at the connection point 13 by the clinching device 1, and as a result, after the deformation, the two work layers 5 and 6 are fixedly connected to each other. Here, the undercut HS of the material region of the upper work layer 5 is formed with respect to the lower work layer 6.

  The punch unit 2 has a punch mandrel 7 at the front free end directed toward the mold 3. In FIG. 1, the punch mandrel 7 is arranged so that the use surface side is on the upper side of the work layer 5 before deformation. The punch mandrel 7 can be acted on by a force along the joining axis S in the direction P1 toward the mold 3 or can be moved in a driven manner, and after the clinching process, the force in the opposite direction P2 Or can be moved in a driven manner. For that purpose, for example, a drive unit (not shown) such as an electric drive unit or a hydraulic / pneumatic drive unit is provided.

  The mold 3 has a columnar inner portion 8 that is fixed inside. On the upper side of the inner part 8, four movable elements are supported. These movable elements are offset around the joining axis S at an angle of 90 degrees in the circumferential direction. Two opposing elements 9 and 10 of the four movable elements are visible.

  The elements 9 and 10 are held so as to be movable radially outward with respect to the joining axis S as indicated by P3 and so as to be movable radially inward as indicated by P4. For this purpose, spring means are provided which push the movable elements 9 and 10 outward by preloading. The spring means are formed by spring arms 11 and 12 which can be elastically deflected. In the initial position (FIG. 1), the spring arms 11 and 12 are slightly inclined inward in the direction toward the free end or in the direction P2 toward the joining axis S.

  FIG. 2 shows the final operating state of the clinching process when the punch mandrel 7 is moved to the maximum in the direction P1, the elements 9 and 10 are warped in the direction P3, and the spring arms 11, 12 are 1 is elastically bent outward in the direction P3 with respect to the initial position in FIG.

When the punch mandrel 7 is retracted in the direction P2, the elements 9 and 10 are reset to the initial position of FIG. 1 in the direction P4 by the spring force of the spring arms 11, 12.
The movable elements 9 and 10 are provided between fixed segments (not shown), and the movable elements 9 and 10 allow the deformed material of the workpiece 4 to form an undercut HS at the connection point 13. That is, it can flow to the back side.

  In order to form the connection point 13, it is essential that the spring arms 11 and 12 operate without any trouble, and in particular, it is essential that there is no breakage. In particular, all of the spring arms 11, 12 provided on the mold, i.e. a plurality of spring arms 11, 12, can be adjusted in a predefined way, preferably each of the spring arms 11, 12 is clinched. The device 1 is functionally correct when it provides the same spring force or the same spring force profile.

  It is disadvantageous that the workpiece is mis-directed or positioned on the mold and / or that the joint points are not optimally formed in the monitored joining process. These can be reliably and practically identified by the present invention.

  Further, damage, wear and / or dirt on the mold or spring arms 11, 12 can adversely affect the function of the spring arms 11, 12, resulting in malfunction of the mold 3, and then The connection point 13 is formed by mistake or has a defect. Thereby, the connection stability required for the connection of the work layers 5 and 6 is not given.

This is addressed by the present invention that the function of the mold can be monitored by the monitoring element in the joining process or during operation of the joining device.
4 to 8 relate to a mold 14 according to the present invention for a related clinch tool for clinching or clinch joining a workpiece W before deformation indicated by a broken line in FIG. A clinching point that is symmetrical with respect to the joining axis S is formed on the workpiece W by the mold 14.

  With the mold 14, a high spot-like portion can be formed particularly on the lower side of the work W on the mold side. In addition, one tool set can be flexibly used to clinch or clinch-join workpieces W having different thicknesses. The mold 14 enables a relatively space-saving and slim shape of the associated clinch device. This is conspicuous by the high accessibility of the mold 14 and the outer shape that is extremely difficult to get in the way.

  The mold 14 includes a mold body 15 and a mold insert 16 inserted into the upper part of the mold body 15. The mold insert 16 has an upper portion 16a and four thin plates 21, 22, 23, and 24 held movably on the upper portion 16a. Between the mold body 15 and the mold insert 16, spring means, for example formed as a yoke spring or a cross spring 25, are provided. The cross spring 25, for example made of spring steel, has a cross-shaped lower part 30 on which the four strip spring arms 26, 27, 28, and 29 face upwards at an angle through the bending area. Protrusively. Instead of the cruciform spring 25, the spring means may be designed in different ways, for example including an elastomeric ring, a helical spring or a spring by other techniques. The mold insert 16 is fixed in the correct position on the mold body 15 by a clamp pin 34 that can be inserted through the corresponding opening. The cross spring 25 is also fixed on the mold 14 by the fixed mold insert 16.

  In order to monitor the functionality of the mold 14, a monitor element 31 is provided on the lower side of the lower part 30 of the cross spring 25. The monitor element 31 is formed from, for example, two strip-shaped strain gauges 32 and 33. The strain gauges 32 and 33 are arranged so as to cross each other and are guided to the outside of the mold 14 or connected to the outside of the mold 14 by respective end portions 32a and 33a made of two electrically conductive wires. The The strain gauges 32, 33 are bonded, for example, to the lower side of the lower part 30 and extend below the lower part 30 over most of the four parts of the lower part 30 that are oriented to intersect. Each of the four parts transitions to one of the four spring arms 26-29 in each case. In this way, the strain gauges 32 and 33 detect the entire cross spring or all of the stress states of the four spring arms 26-29, and in particular, the spring arms 26-29 are deformed or moved during the joining process. Detect if. This deformation or movement usually means a movement that elastically warps in the outer direction of the direction P3 and in the opposite direction of the direction P4.

  The non-uniform stress distribution of the four spring arms 26-29 that can be detected by the strain gauges 32, 33 is, for example, one or more of the thin plates 21-24 and / or the cross spring 25 or the spring arms 26-29. This results when the at least one spring arm is broken. The associated measurement signals of the two strain gauges 32, 33 are transmitted to the monitoring unit via wires (not shown) that engage the ends 32a, 33a and then output, for example, warning signals and / or error messages. To be processed there.

  The mold body 15 has a solid cylindrical base 35, and the solid cylindrical base 35 includes a thin wall or sleeve-like enclosure 36 adjacent to the upper part thereof. On the open side of the enclosure 36 facing the punch of the associated clinching tool, four slots 37 are formed from above into the inside which are offset from one another in the circumferential direction by an angle of 90 degrees. These slots 37 extend over most of the length of the enclosure 36. The enclosure 36 encloses a receiving space in which the mold insert 16 and the cross spring 25 are accommodated. Assembly or disassembly of the mold 14 composed of the parts 15, 16, 25, 32, 33, and 34 is possible by a small number of simple processes.

  The upper structure of the mold 14 is particularly clearly shown in FIGS. As shown in FIG. 5, the four thin plates 21 to 24 have a U-shaped cross section, and four fixing portions of the upper portion 16 a are provided between the four thin plates 21 to 24 in the circumferential direction. Each of these four fixtures provides planar support areas 17, 18, 19, and 20 for the workpiece W that can be machined using the associated clinching tool during the clinching process. Each planar upper side of the thin plates 21 to 24 is provided at the same level as the support regions 17 to 20, that is, provided in the plane E together with the support regions 17 to 20. In general, the workpiece W having a flat lower side is formed at the upper part of the support regions 17 to 20 and at the upper side of the thin plates 21 to 24 on the plane E (see FIG. 5) at the start of the clinching process. Supported on the lower side. The mold recess 38 opened above the mold 14 is surrounded by the support regions 17 to 20 and the thin plates 21 to 24 to form a center recess, and the center recess is generated by the mold 14 in each workpiece W. It has a depth that predefines a length that projects below the clinched connection point.

  For a mold 14 that is functionally correct, the lamellas 21-24, and thereby the spring arms 26-29, in the radial direction, i.e. direction P3, are used to produce symmetrical clinch points or connection points. Warp to a predefined deflection position. This is achieved during the clinching process by the punching action of a punch (not shown) which is movable in a manner driven along the joining axis S of the associated clinching tool. The deformed workpiece material is, for example, in such a way that all four spring arms 26-29, ie their longitudinal axes are parallel to the joining axis S or, for example, aligned with the wall of the enclosure 36. The thin plates 21 to 24 are pressed radially outward. Here, the spring arms 26 to 29 protrude from the inside in the radial direction to the outside into the region of the slot 37 where there is no material. Accordingly, in each case, the travel path of the warp motion of the spring arms 26-29 is realized by the area of the slot 37 where there is no material.

  The strain gauges 32, 33 attached to the cross spring 25 identify damages or failures of the mold 14 quickly and directly, particularly in the process environment of the clinching device. As described above, according to the present invention, monitoring of functions, that is, identification of malfunctions and damages of the mold 14 is reliably performed.

DESCRIPTION OF SYMBOLS 1 ... Apparatus, 2 ... Punch unit, 3 ... Die, 4 ... Work, 5, 6 ... Work layer, 7 ... Punch mandrel, 8 ... Inner part, 9, 10 ... Element, 11, 12 ... Spring arm, 13 ... Connection point, 14 ... mold, 15 ... mold body, 16 ... mold insert, 16a ... upper part, 17-20 ... support region, 21-24 ... thin plate, 25 ... cross spring, 26-29 ... spring arm, 30 ... Lower part, 31 ... Monitor element, 32 ... Strain gauge, 32a ... End, 33 ... Strain gauge, 33a ... End, 34 ... Clamp pin, 35 ... Base, 36 ... Enclosure, 37 ... Slot, 38 ... Mold recess

Claims (16)

A mold (14) for a joining apparatus, wherein at least one monitor element (31) for monitoring the functionality of the mold (14) is attached to the mold (14) ,
The monitor element (31) includes strain gauges (32, 33),
The mold (14) includes spring means (25), and the spring means (25) includes a cross spring having a plurality of elastically movable spring arms (26-29), and a mold part. (21-24) are assigned to one spring arm (26-29),
The spring arms (26-29) are connected at one point,
The mold (14) includes four movable mold parts (21-24) which are elastically movable in each case by one spring arm (26-29) of the spring means (25). , Mold (14).   A mold (14) for a bonding apparatus, wherein at least one monitoring element (31) for monitoring a bonding process intended to be performed by the mold (14) comprises the mold ( A mold (14) attached to 14). At least one monitoring element for monitoring the bonding process are intended to be practiced by the mold (14) (31) is attached to said mold (14), a mold according to 請 Motomeko 1 (14). The monitor element (31) is coupled to a mold part of the mold (14) that receives movement caused by the joining process during joining,
The monitor element (31) specifically monitors the movement of the movable mold part,
The metal mold | die of Claim 2 or Claim 3 . The monitor element (31) is coupled to a mold part of the mold (14) provided movably on the mold.
The metal mold | die of Claim 2 or Claim 3 . The monitoring element is coupled to the second structure;
The second structure part interacts with a mold part of the mold (14) provided movably on the mold (14);
The metal mold | die of Claim 2 or Claim 3 . The monitor element (31) includes a sensor arrangement,
The metal mold | die of Claim 2 or Claim 3 . The monitor element (31) serves to continuously provide measurement signals for monitoring the functionality of the mold (14) and / or the joining process that can be performed by the mold (14). Including sensors such as strain gauges (32, 33)
The metal mold | die of Claim 2 or Claim 3 . The monitor element (31) is configured to provide an associated measurement signal when the mold portion coupled to the monitor element (31) is subjected to a load that is outside a range of normal load conditions.
The metal mold | die of Claim 2 or Claim 3 . The monitor element (31) is designed to provide a measurement signal to the upper unit,
The metal mold | die of Claim 2 or Claim 3 . The monitor element (31) includes a plurality of sensors.
The metal mold | die of Claim 2 or Claim 3 . The monitoring element (31) includes exactly two sensors,
12. A mold according to claim 2 or claim 11 . The monitoring element (31) contains just three or just four sensors,
12. A mold according to claim 2 or claim 11 . The mold (14) has movable mold parts (21-24) that interact with spring means (25) for resettable movement,
The mold according to claim 1 or 2 . The mold (14) has spring means (25) with elastically deflectable spring arms (26-29),
The mold according to claim 1 or claim 14 . An apparatus for placing a joining element on a workpiece or for clinch joining the workpiece,
Including a punch unit and a mold unit arranged on the opposite side,
The workpiece that can be machined by the apparatus can be clamped between the punch unit and the mold unit;
It said mold unit comprises a mold according to 請 Motomeko 1 or claim 2 (14), device.