DE102019108211A1 - Die for a setting tool and setting tool - Google Patents

Abstract

A die (1) for a setting tool for setting a joining element and / or a functional element on a workpiece section is proposed. The die (1) has a die face (15), a die base (14) and a die insert (13) which is movably received in the die base (14), with spring means acting on the die insert (13) the die (1) are present in a spring receiving space for the spring-loaded mounting of the die insert (13). According to the invention, the spring receiving space is designed to accommodate operating fluid, a supply section being designed for supplying operating fluid from the spring receiving space into the area of the die face (15).

Description

State of the art

There are known dies for setting tools for setting a joining element or a functional element on a workpiece section or a sheet metal. The setting tool comprises a punch unit with a punch that can be moved along a setting axis during the setting process, the die having a die end face which, when the die is present on the setting tool, faces the punch unit. The die furthermore has a die base body and a die insert which is movably received in the die base body, spring means of the die acting on the die insert being present for spring-loaded mounting of the die insert. The spring means are accommodated in a spring receiving space of the die.

In certain applications, operating fluid such as, for example, a lubricating fluid is required in the die or in an end area of the die which faces the workpiece section during the setting process.

The provision of the operating fluid on the die can be impaired in practice or in cyclic operation, for example due to wear and tear or soiling or deposits on the die.

Object and advantages of the invention

The object of the present invention is to improve a die of the type explained at the outset, in particular with regard to a reliable supply of a die area with an operating fluid in practice.

This problem is solved by the independent claims. The dependent claims address advantageous and useful developments of the invention.

The invention is based on a die for a setting tool for setting a joining element and / or a functional element on a workpiece section, the setting tool comprising a punch unit with a punch that can be moved along a setting axis during the setting process, the die having a die end face, and wherein when the die (1) is present on the setting tool, the die end face (15) of the punch unit faces, the die comprising a die base and a die insert which is movably received in the die base, with spring means acting on the die insert the die for the spring-loaded mounting of the die insert are present, the spring means being received in a spring receiving space of the die. The die insert can be designed, for example, as an anvil that can be displaced in the base body with a spring. An end face of the die preferably comprises a z. B. annular flat support section of the base body fixedly present on the tool for the underside support of the workpiece section resting on it. The frontal area of the movable die insert is located within the support section or enclosed by it. A sliding bearing of the die insert is preferably set up between an inner side of the base body, which has a corresponding matching recess for receiving the die insert, and the die insert.

A joining element is, for example, a rivet or punch rivet, semi-hollow punch rivet, clinch rivet and the like.

As functional elements, nuts, bolts, rivets or screws can be understood, for example, which can be pressed into the workpiece section with the aid of the punch and the die, for example.

In the case of functional elements, a distinction can be made between clinch elements that deform the component, self-punching elements that cut a hole, press-in elements that are inserted into an existing hole and rivet elements that claw into the pre-punched metal when inserted.

A sheet metal or a multilayer laminated core is to be understood as a workpiece or workpiece section, for example. The setting tool which has the die is, for example, a riveting or clinching tool. The punch of the setting tool is driven electromechanically or with an electric drive, pneumohydraulically as with a hydropneumatic pressure intensifier or hydraulically in the direction of the die and back again or reversibly linearly movable. The die base body can be formed in one piece or in several pieces.

The setting tool can, for. B. in the manner of a modular pliers system or as setting pliers and has, for example, a so-called C-bracket, on the facing opposite bracket ends on the one hand, the punch and on the other hand, the die are present.

The essence of the invention is that the spring receiving space is designed to accommodate operating fluid, for example a Lubricant, a supply section of the die being designed to supply operating fluid from the spring receiving space into the area of the die face.

Thus, in an already existing inner area of the die z. B. in a cavity of the die, in which the spring means are received and act on the die insert, advantageously the accommodation, storage or provision of operating fluid such. B. a lubricant such as a lubricating oil. This is because, as a rule, the cavity of the die has unoccupied areas by the spring means, which are normally filled with air which, in the case of the die according to the invention, is filled by the operating fluid. This is advantageously possible at least almost without a redesign of known dies of the same type and / or without changing the outer dimensions of the die, so that the die according to the invention can be used variably and is compact.

With the punch, a joining element and / or functional element can be set on the workpiece section supported on the die face, in that the punch acts on the joining or functional element. For this purpose, the die insert is preferably exposed to the front side with operating fluid z. B. oiled. Accordingly, with the invention, an outer side or an edge of the die insert and the die end face can advantageously be wetted by the operating fluid present in the spring receiving space. The die insert itself can be designed more simply, since the supply section does not require a passage through the die insert. Here, the operating fluid reaches the end face of the die, preferably pressure-assisted by a reduction in volume for the existing operating fluid of the entire available volume in the die or in the spring receiving space, whereby this is not completely filled by the spring means and therefore advantageously space for provides the submission of operating fluid. The spring-receiving space, which changes or decreases in volume during the setting process, whereby the spring means are compressed, is preferably sleeve-shaped with an outer and / or inner cylindrical shape.

With the reducing volume of the spring receiving space available for the operating fluid when it is set, a small part of the operating fluid is inevitably displaced via the supply section from the spring receiving space into the area of the die face. This is preferably also done via gap sections between the die base body and the die insert. The gap section is advantageously comparatively insensitive to contamination, since the movement of the die insert moves possible particles away from the gap section or the gap section is continuously freed from contamination. The gap section is also protected against contamination by the flow movement of the pressurized operating fluid during the setting process.

The supply section for the supply of operating fluid advantageously comprises a channel which is formed between the die base body and the die insert. A channel can be set up easily and / or in the desired form on the die, for example during the manufacture of the die or afterwards. In this way, an area of the die that has been picked out, which includes the channel, can be used to supply operating fluid. The channel can advantageously be designed consciously or in a targeted manner in terms of its extension or its size and / or position, and thus a desired level of supply of the end face of the die with operating fluid can be determined. Preferably, several z. B. separate channels provided.

It is also advantageous if the supply section for supplying operating fluid comprises a channel, a channel wall being formed by a section of the die base body and a further channel wall being formed by a section of the die insert. This allows the channel to be set up between the die base and the die insert. This is advantageous because there is a component separation of the two die components for the relative movement between the die base body and die insert.

Another modification of the invention can be seen in the fact that the channel is formed between the die insert and an adjoining section of the die base body. The channel is easy to set up there, especially since the die base body and the die insert are separate components.

It is also advantageous if the supply section for supplying operating fluid comprises a gap area which is formed by a recess and / or a chamfer and / or a milled portion and / or a depression. With modern manufacturing processes, a recess, chamfer, milling or recess can also be set up subsequently on standard matrices without any problems, in particular z. B. with a cutting process, for processing the die base body and / or the die insert, which are preferably made of a metal material such as a tool steel. The gap area in particular forms the channel between the die insert and an adjoining section of the Die base body. The gap area runs in the axial direction to the setting axis between the receiving space and the area of the die front side, for example linearly or parallel to the setting axis or z. B. spirally around the setting axis. The gap area preferably has a gap width of a few tenths of a millimeter. As a result, depending on the number of channels, on the size and / or the course and / or the flow cross-section provided by the gap area, a precisely predeterminable or fine metering of operating fluid in the area of the die face can be influenced.

According to an advantageous modification of the invention, the channel is formed on an outside of the die insert. A standard die base body can thus be used, so that only the die insert has to be formed or processed to provide the channel. The die insert can also be a standard die insert, on which the channel can be formed on the outside by chamfering, milling or the like.

The material recess is preferably a chamfer and / or a depression such as a groove or a channel. Compared with known matrices, the material recess is preferably made exclusively on the matrix insert, in particular subsequently on a standard matrix insert. Preferably, a chamfer running in the longitudinal direction of the die base body or running in the direction of the setting axis is provided on the die insert for the supply of the operating fluid. The shape of the opposite side on the base body is advantageous geometrically unimpaired z. B. cylindrical or uniformly without material recess for the geometric shape of the standard die base body.

It is also advantageous that the die insert has a front die insert section which forms part of the die end face, and a rear die insert section which has an outer dimension that is radially larger than the front die insert section relative to the setting axis. The rear die insert section is preferably completely received within the die base body or is enclosed by this on the outside. The die insert is preferably in one piece or the front and rear die insert sections are in one piece.

The basic shape of the outside of the front die insert section and / or the rear die insert section is preferably cylindrical.

It is not excluded that the die insert is at least in two parts. For example, an exchange of the highly stressed front die insert section that has been worn out during operation can be carried out in a simplified manner.

A preferred variant can be seen in the fact that a shoulder is provided along the setting axis between the front die insert section and the rear die insert section. The shoulder allows the die insert to be captive on the die.

The shoulder preferably forms a section which is oriented transversely or axially to the setting axis and which forms a section of the channel of the supply section for supplying operating fluid to the die face, which section is oriented radially to the setting axis.

In the area of the shoulder there is preferably a circumferentially extending groove, in particular with a concave shape, at the transition from the axially oriented section to the front die insert section. The groove provides an intermediate reservoir for operating fluid with a comparatively small volume, which is separated from the receiving space. This improves the reliable provision and supply of operating fluid on the path between the spring receiving space and the area of the die face. In addition, the flow of the operating fluid from the spring receiving space to the die face is facilitated.

A further advantage results from the fact that the die has a feed section to the spring receiving space, the feed section being designed for a feed of operating fluid from the outside into the spring receiving space. This can, for. B. via a bore or a line, preferably automated, a subsequent delivery of operating fluid can be guaranteed that is consumed during operation. This is advantageously possible without any operational impairment or operational interruption of the die or the tool. This is because, during operation, operating fluid can be fed in from outside via the feed section at any time, for example discontinuously or continuously.

The transport of operating fluid from the outside to the feed section of the die preferably comprises a device with, for example, a rigid or flexible line that is connected to e.g. B. is connected to a reservoir or a storage and storage container outside the die, in which a comparatively larger amount of operating fluid is presented. A pressure increase unit such as a pressure source or a pump unit such as a hydraulic pressure pump is preferably used Forced delivery of the operating fluid from the outside into the spring receiving space is provided. Alternatively, the forced delivery can also be carried out with the aid of gravity or by means of gravity.

It is also advantageous that the die has a die rear side which is spaced apart from the die front side in the direction of the setting axis, the die rear side having an opening which is connected to the spring receiving space for the passage of operating fluid. The rear side of the die is preferably a rear side of the base body of the die. Thus, the operating fluid can be supplied or replenished via an outside of the die which has the opening. For the connection of the die with z. B. a transport or supply line, which is particularly releasably connectable close to the opening, is advantageously carried out z. B. via a screw or other type of tight connection. This is advantageously set up on a rear side of the die, which is not critical for operation, without disruptive functional influences occurring on the opposite die face.

For example, a lower axial end face of the die or the die base body, like a die back, has a connection for the supply of operating or cooling and lubricating liquid.

Alternatively, a lateral or radial transport of operating fluid to the die is also possible, for example an opening laterally or radially z. B. is present on the matrix body. The side opening enables operating fluid to be transported to a side die area and from there further into the spring receiving space.

It is also advantageous if the die base body is constructed in several parts. This enables a modular structure, which is advantageous with regard to the manufacture and replacement of wear parts. The die base body comprises, for example, various assemblable individual parts, for example a die top part, an outer sleeve, a spacer, two pressure plates on both sides of the spacer, spring means, plug-in members and a die base or die base. The die insert is preferably seated in a cavity of the die base body, for. B. above the spacer, and surrounded by the die top and a portion of the outer sleeve. For the connection and fixed positioning of the upper die part inserted in the outer sleeve, two plug-in members such as two plug-in pins can preferably be inserted through openings in the outer sleeve. The plug-in members engage with a partial area of their outside in a recess on the outside of the upper die part, so that the upper die part is secured against movement in the longitudinal direction of the setting axis on the outer sleeve. Correspondingly, the die base is secured to the outer sleeve via two plug-in members which, with a partial area of their outside, engage in a recess on the outside of the die base.

The die insert is advantageously in one piece. This is advantageous in terms of production technology and economically. Alternatively, a multi-part die insert is also possible.

The die insert is preferably designed as a solid material. The die insert is preferably, in particular, a single component. The die insert preferably has an envelope surface without an opening or passage or without a bore. The die insert has in particular no z. B. central or central opening or through hole. This means that a closed end face of the die insert can be optimally wetted with operating fluid, e.g. B. a uniform thin film of lubricant.

According to another embodiment according to the invention, the die end face has an end face section which is recessed towards an adjacent section of the die face end. In particular, the adjacent section is an outer ring-shaped end face section which is provided by part of an end face of the die base body. The recessed end face section is preferably formed by an annular channel of the end face of the die, the recessed end face section or the annular channel being present within the annular end face section. The bottom of the ring channel is formed by the face of the die insert. When the die insert is pushed into a stop position in the direction of the punch by the spring means, a central area of the face of the die insert cannot be recessed or at the level of the face of the die base, possibly even protrude slightly towards the face of the die base.

When the die insert is pushed back completely or to the maximum extent in the die base body, the height of the recess measured in the direction of the setting axis is, for example, 4 to 5 millimeters. When the die insert is pushed into the stop position by the spring means in the direction of the punch, the height of the recess is, for example, approximately 2 millimeters.

An advantageous embodiment of the invention is characterized in that the supply section reaches up to the recessed end face section. This ensures that operating fluid to or into the recess or into the reaches the top ring channel. The supply section or a gap area or the channel opens with one end at the recessed end face section.

The die preferably comprises a separate plate element which adjoins the spring receiving space on the front and / or on the rear. The z. B. two printing plates, e.g. B. disc-shaped elements are preferably provided on the front and rear of the spring means. The front pressure plate is preferably accommodated between the spring means and the rear of the die insert. The front pressure plate has one or more passage openings for the passage of operating fluid from the spring receiving space to the die insert. The front pressure plate preferably has a larger outer diameter than the die insert. The front pressure plate transmits the spring force of the spring means to the die insert. The rear pressure plate is preferably present between the spring means and the die base. The spring means and the spacer are accommodated between the two pressure plates or between a pressure plate and a die base.

According to an advantageous modification of the invention, the die base body and the die insert are matched to one another in such a way that when the die insert moves relative to the die base body, with the die insert moving in the direction of the spring receiving space, a measure of the hollow volume filled by the operating fluid the die changes during the movement of the die insert in such a way that operating fluid flows over from the spring receiving space via the supply section into the area of the die face. The change in the hollow volume of the die, which is filled by the operating fluid, with respect to the setting process, this hollow volume comprising a part of the spring receiving space and the supply section, is a reduction in the hollow volume filled by the operating fluid. This ensures that when a joining element is set, a small, preferably predeterminable, volume of operating fluid flows out of the spring receiving space and the supply section into the area of the die face, thus ensuring a lubricating effect.

The invention also relates to a setting tool for setting a joining element and / or a functional element on a workpiece section with a punch unit and with a die according to one of the variants described above. The setting tool has a drive for the stamp unit, such as an electromechanical drive or an electric drive, a pneumohydraulic drive such as a hydropneumatic pressure booster or a hydraulic drive. With the drive, the punch of the punch unit can be driven in the direction of the die and back again or reversibly in a linear manner.

The setting tool or its die is preferably supplied with the operating fluid, eg. B. a lubricating oil is supplied. The supply unit includes, in particular, an oil container in which the operating fluid is placed, a liquid or oil pressure pump, a pressure switch, a supply hose between the oil container and the die for conveying the operating fluid, a valve integrated in the supply hose, a collecting container for Operating fluid and a drainage hose to drain excess operating fluid from the die into the collecting container.

The pressure pump in the oil tank builds up a defined pressure. The amount of operating fluid is metered and fed to the die via the valve. The operating fluid is introduced into the die or into the spring receiving space and excess operating fluid can be drained off into the collecting container via the drainage hose.

A pressure drop in the fluid system, which can be detected at the pressure switch, can be used to ensure and the controller can detect that operating fluid is being pumped into the die. Driving dry is advantageously safely avoided. The unit can be retrofitted with minimal effort, in particular by reworking an existing standard die and integrating it into the hardware and software, and by converting the mechanics and controls on site.

Figure list

• 1 eine erfindungsgemäße Matrize in einer ersten Funktionsstellung in perspektivischer Ansicht schräg von oben,
• 2 die Matrize gemäß 1 in Explosionsdarstellung,
• 3 ein Element der Matrize gemäß 2 in vergrößerter perspektivischer Einzeldarstellung,
• 4 die Matrize gemäß 1 im Längsschnitt,
• 5 einen vergrößerten Ausschnitt des umrandeten Bereichs A in 4,
• 6 die Matrize gemäß 1 im Längsschnitt in einer zweiten Funktionsstellung,
• 7 die Matrize gemäß 4, wobei ein Volumen V1 und ein Volumen V2 hervorgehoben sind,
• 8 die Matrize gemäß 6, wobei das Volumen V2 und ein Volumen V3 hervorgehoben sind,
• 9 eine Versorgungseinheit, mit einer Matrize eines Setzwerkzeugs, dem Betriebsflüssigkeit zuführbar ist und
• 10 einen Ausschnitt einer alternativen Matrize im Längsschnitt.

Further features and advantages of the invention are explained in more detail below with reference to the exemplary embodiments shown schematically in the figures. In detail shows:

• 1 a die according to the invention in a first functional position in a perspective view obliquely from above,
• 2 the die according to 1 in exploded view,
• 3 an element of the die according to 2 in enlarged perspective individual representation,
• 4th the die according to 1 in longitudinal section,
• 5 an enlarged section of the bordered area A in 4th ,
• 6th the die according to 1 in a longitudinal section in a second functional position,
• 7th the die according to 4th , with a volume V1 and a volume V2 highlighted,
• 8th the die according to 6th , with the volume V2 and a volume V3 highlighted,
• 9 a supply unit with a die of a setting tool to which operating fluid can be supplied and
• 10 a section of an alternative die in longitudinal section.

In some cases, the same reference symbols are used for corresponding elements of different exemplary embodiments.

A die according to the invention 1 consists of several assemblable individual parts including an upper die part 2 , an outer sleeve 3 , a spacer 4th , two printing plates 5 , 6th on both sides of the spacer 4th , four plug-in organs 7-10 , Spring means 11 , a die base or a die base 12 and a die insert 13 . A die face 15th the die 1 , which faces a stamp unit of a corresponding setting tool, lies a back of a die 16 the die 1 across from. The back of the die 16 is through an axial outside of the die base 12 formed with an external thread 12a is provided so that the die base 12 via an internally threaded section of the hollow cylindrical outer sleeve 3 by screwing into the back of the outer sleeve 3 is releasably attachable. This forms the upper part of the die 2 , the outer sleeve 3 and the bottom of the die 12 a die base 14th the die 1 .

A setting axis S runs in the longitudinal direction of the die 1 centrically through the die 1 .

The die insert 13 sits preferably in a cavity of the die base body 14th z. B. above the spacer 4th , and surrounded by the die top 2 and a portion of the outer sleeve 3 .

The spring means 11 are here as compression spring means through a mechanical spring ring package 17th educated. The spring ring package 17th surrounds the spacer 4th and serves for the spring-loaded mounting of the die insert 13 inside the die 1 . The die insert 13 is located according to the 4th and 7th in a stationary stop position in the die 1 under the action or the pretensioned spring means 11 who have made the die insert 13 forward in a first direction of movement R1 of the die insert 13 relative to the die base 14th push. The stop position is determined by the impact of the front pressure plate 5 on an internal shoulder of the outer sleeve 3 .

In 7th are on the face of the die 1 or on the die face 15th supported workpiece section 18th and one above for a setting process on the workpiece section 18th properly aligned functional element 19th indicated by dashed lines. In operation of a setting tool, not shown, which the die 1 includes, a joining element like the functional element 19th under the action of a moving towards R3 linearly driven moving punch of the punch unit of the setting tool in the workpiece section 18th pressed in from above. For this purpose, a free front punch face of the punch presses on an upper side under a press-in force provided by the punch 19a of the functional element 19th . When setting the functional element 19th on the workpiece section 18th become areas of the functional element 19th and the workpiece section 18th punched and plastically deformed. The die insert gives way during the setting process 13 something in a second direction R2 off, against one of the spring means 11 provided spring force. An evasive position of the die insert 13 show the 6th and 8th .

The functional element is at the end of the setting process 19th firmly in the workpiece section 18th anchored, with part of the functional element 19th on the top of the workpiece section 18th protrudes.

The spring means 11 or the spring ring package 17th are in a cavity of the die 1 or in a spring receiving space 20th recorded. The spring reception room 20th extends in the axial direction to the setting axis S between the two pressure plates 5 and 6th and radially to the setting axis S between a cylindrical inside of the hollow cylindrical outer sleeve 3 until radially further inside to a cylindrical outside of the spacer 4th . This results in the spring receiving space 20th as a cylindrical ring volume within the die 1 .

The die face 15th includes an annular outboard portion 21st from a front side of the die top 2 is formed, and one to the section 21st recessed end face section 22nd , the through adjacent wall sections of the die top 2 and the die insert 13 is limited. The basic form of the stepped cylindrical die insert 13 also has an end face which is centrally or centrally a round button-shaped elevation 23 owns. In the resting stop position of the die insert 13 in the die 1 is a top of the increase 23 in the direction R1 slightly offset to the frontal section 21st of the die top 2 .

For a functionally reliable setting of a joining or functional element, a small amount of operating fluid B (see 5 ) such as B. a lubricating oil in the recessed end face portion 22nd to be available. It is desirable that the walls of the recessed end face section 22nd are wetted with the lubricating oil.

Because after a joining or functional element has been set, there is always a certain amount of lubricating oil on the workpiece section 18th remains adhered, a small amount of lubricating oil must be added or replenished with each setting process.

This is on the back of the die 16 in the die base 12 an opening 24 intended. The opening 24 delimits a central hole 25th in the bottom of the die 12 . The hole 25th is connected to a central passage opening 26th in the rear pressure plate 6th , a central through hole 27 in the spacer 4th and an intermediate volume 28 . The intermediate volume 28 forms in the resting stop position of the die insert 13 in the die 1 between the top of the spacer 4th and the underside of the front pressure plate 5 off, so that with a supply of the die 1 with operating fluid through the opening 24 the spring receiving space 20th is filled with operating fluid.

The one corresponding to the pressure plate 6th trained front pressure plate 5 has, in addition to a central passage opening, several radially outer passage openings 29 on that to the spring-receiving space 20th and are accordingly charged with operating fluid. Via the passage openings 29 operating fluid also enters a ring volume 30th between a base section 31 of the die insert 13 and an inside of the hollow outer sleeve 3 . Above the base section 31 a pin section closes 32 of the die insert 13 with a smaller diameter than the base portion 31 on. Between the base section 31 and the pin section 32 is a paragraph 33 with a circumferential chamfer 34 educated.

The pen section 32 is in a matching central cylindrical bore 35 in the upper part of the die 2 added so that between cylindrical areas 32a an outside of the pin portion 32 and the bore 35 a gap area 36 is formed. Over the gap area 36 can working fluid from the ring volume 30th in the recessed face section 22nd reach. In addition, for further supply of the recessed face section 22nd with operating fluid are in the longitudinal direction of the pin section 32 or in the direction of the setting axis S, three channels circumferentially offset from one another by 120 angular degrees to the setting axis S 37 educated. The channels 37 have a channel wall, which is partly through three flattened webs or chamfers 38 outside of the pin section 32 are formed.

Outside on the base section 31 are to the chamfers 38 extensive offset three chamfers 31a present, which means there is a sufficient amount of operating fluid from the spring receiving space 20th in the face section 22nd got.

A supply section of the die 1 serves to supply operating fluid from the spring receiving space 20th in the area of the recessed end face section 22nd . The supply section comprises the intermediate volume 28 , the passage openings 29 , the ring volume 30th and in the area of the pin section 32 the hollow 34 who have favourited channels 37 and the gap area 36 . This ensures that the spring receiving space 20th is always filled with operating fluid, operating fluid comes in from the outside through the opening 24 who have favourited Bore 25th and the passage opening 26th further into the through hole 27 supplied by means of a supply unit described below 39 .

This ensures that operating fluid is used during the setting process, i.e. while the die is being used 13 from the in 7th The first position shown moves back in the direction of R2 (s. 6th and 8th ), the volumes are V1, V2 and V3 (see 7th , 8th ) coordinated accordingly.

The volume V1 is a hollow volume in the die 1 between the upper part of the die 2 and the lower pressure plate 6th (see 7th ) or between the upper part of the die 2 and the bottom of the die (see p. 10 ). The volume V1 is reduced by the volume during the setting process V2 , the displaced volume of operating fluid via the channels 37 in the gap area 36 in the face section 22nd flows.

The volume V2 is a sub-volume of the pen section 32 , which at the beginning of a setting process on the inside of the recessed end face section 22nd connects. During the setting process, the volume V2 moves with the movement of the die insert 13 in the direction R2 from the recessed end face section 22nd out, so that the volume of the recessed face section 22nd enlarged accordingly.

The supply unit, which can be controlled by a controller (not shown), is used to supply and provide operating fluid to the die 1 39 available (s. 9 ). In 9 is the die 1 only partially and schematically indicated by dashed lines.

With the supply unit 39 is operating fluid, e.g. B. a lubricating oil, brought from the outside to the die 1 or collected excess lubricating oil. In the 9 partly schematically or not to scale shown supply unit 39 in particular comprises an oil container 40 , in which the operating fluid is provided, a fluid or oil pressure pump 41 , a pressure switch 42 , a feed tube 43 between the oil tank 40 and the die 1 for the delivery of the operating fluid, one in the supply hose 43 integrated valve 44 , a collecting container 45 for operating fluid and a drainage hose 46 for discharging excess operating fluid from the die 1 into the collecting container. The oil pressure pump 41 builds up a defined or specifiable hydraulic pressure. About the valve 44 the amount of oil is dosed to the die 1 guided and introduced into this. Via a pressure drop at the pressure switch 42 can be ensured and detected via the control that lubricating oil is in the die 1 is promoted. A dry run of the die 1 will certainly be avoided.

In 10 is a lower section of an alternative die according to the invention 47 shown in longitudinal section. The die 47 differs from the die 1 in that instead of the spacer 4th , the lower pressure plate 6th and the die base 12 a one-piece raised die base 48 is provided that extends from the back of the die 16 to the front end of the spring means 11 below the front pressure plate 5 extends.

List of reference symbols

1

die

2

Die top

3

Outer sleeve

4th

Spacer

5, 6

printing plate

7-10

Plug organ

11

Spring means

12th

Die bottom

12a

External thread

13

Die insert

14th

Die base body

15th

Die face

16

Back of the die

17th

Spring ring package

18th

Workpiece section

19th

Functional element

19a

Top

20th

Feather receiving space

21st

section

22nd

Face section

23

increase

24

opening

25th

drilling

26th

Passage opening

27

Through hole

28

Intermediate volume

29

Passage opening

30th

Ring volume

31

Base section

31a

Chamfer

32

Pen section

32a

Area

33

paragraph

34

Fillet

35

drilling

36

Gap area

37

channel

38

Chamfer

39

Supply unit

40

oilcontainer

41

Pressure pump

42

Pressure switch

43

Feed hose

44

Valve

45

Collecting container

46

Drainage hose

47

die

48

Die bottom

Claims (18)

Die (1, 47) for a setting tool for setting a joining element and / or a functional element (19) on a workpiece section (18), the setting tool comprising a punch unit with a punch that can be moved along a setting axis during the setting process, the die (1, 47) has a die end face (15), and the die end face (15) faces the punch unit when the die (1, 47) is present on the setting tool, the die (1, 47) having a die base body (14) and a die insert (13) which is movably received in the die base body (14), spring means (11) of the die (1, 47) acting on the die insert (13) for spring-loaded mounting of the die insert (13) are present, the Spring means (11) are received in a spring receiving space (20) of the die (1, 47), characterized in that the spring receiving space (20) is designed to accommodate operating fluid, for example a lubricant, with a supply section of the Die (1, 47) is designed for supplying operating fluid from the spring receiving space (20) into the area of the die face (15). Die after Claim 1 , characterized in that the supply section for supplying operating fluid comprises a channel (37) which is formed between the die base body (14) and the die insert (13). Die after Claim 1 or after Claim 2 , characterized in that the supply section for supplying operating fluid comprises a channel (37), a channel wall being formed by a section of the die base body (14) and a further channel wall being formed by a section of the die insert (13). Die according to one of the preceding claims, characterized in that the channel (37) is formed between the die insert (13) and an adjacent section of the die base body (14). Die according to one of the preceding claims, characterized in that the supply section for supplying operating fluid comprises a gap area (36) which is formed by a recess and / or a bevel (31a, 38) and / or a milled off and / or a depression . Die according to one of the preceding claims, characterized in that the channel is formed on an outside of the die insert (13). Die according to one of the preceding claims, characterized in that the die insert (13) has a front die insert section (32) which forms part of the die end face (15), and a rear die insert section (31) which has a radially larger outer dimension to the setting axis than the front die insert section (32). Die according to one of the preceding claims, characterized in that a shoulder (33) is provided along the setting axis between the front die insert section (32) and the rear die insert section (31). Die according to one of the preceding claims, characterized in that the die (1, 47) has a feed section to the spring receiving space (20), the feed section being designed for supplying operating fluid from the outside into the spring receiving space (2). Die according to one of the preceding claims, characterized in that the die has a die rear side (16) which is spaced apart from the die front side (15) in the direction of the setting axis, the die rear side (16) having an opening (24 ), which is connected to the spring receiving space (20) for a passage of operating fluid. Die according to one of the preceding claims, characterized in that the die base body (14) is constructed in several parts. Die according to one of the preceding claims, characterized in that the die insert (13) is in one piece. Die according to one of the preceding claims, characterized in that the die insert (13) is designed as a solid material. Die according to one of the preceding claims, characterized in that the die end face (15) has an end face section (22) which is recessed towards an adjacent section (21) of the die face (15). Die according to one of the preceding claims, characterized in that the supply section reaches up to the recessed end face section (22). Die according to one of the preceding claims, characterized in that the die (1, 47) comprises a separate plate element (5, 6) which adjoins the spring receiving space (20) on the front and / or on the rear. Die according to one of the preceding claims, characterized in that the die base body (14) and the die insert (13) are matched to one another in such a way that when the die insert (13) moves relative to the die base body (14), the die insert (13) moves in the direction of the spring receiving space (20), a measure of the hollow volume of the die (1, 47) filled by the operating fluid changes during the movement of the die insert (13) in such a way that operating fluid flows out of the spring receiving space ( 20) flows over the supply section into the area of the die end face (15). Setting tool for setting a joining element and / or a functional element (19) a workpiece section (18) with a die (1, 47) according to one of the preceding claims.

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