EP2668028A1

EP2668028A1 - Powder press

Info

Publication number: EP2668028A1
Application number: EP12702774.6A
Authority: EP
Inventors: Alex Wehrli
Original assignee: OSTERWALDER AG
Current assignee: OSTERWALDER AG
Priority date: 2011-01-24
Filing date: 2012-01-24
Publication date: 2013-12-04
Also published as: KR20140002716A; EP2479022A1; WO2012101103A1; JP2014502924A; US20130302456A1; CN103328197A

Abstract

The powder press has a die assembly that is provided with an intermediate link (41) and a die plate (42). The intermediate link is connected with two parallel drive units (9,10) work along a vertical axis. The die plate is connected with the intermediate link. The die plate is guided along a stroke direction or vertical direction at guiding units (5,6,7). A plunger arrangement has another intermediate link and a stamping plate.

Description

powder Press

The invention relates to a powder press for producing a compact of a powdery material. Such a powder press has a frame, a punch assembly and a die assembly. The latter defines a mold cavity, in which the pul deformed material can be filled, whereupon to form the compact the

Stamp assembly and the die assembly along a press vertical axis moved relative to each other and can be pressed against each other.

The drive of the die assembly or the punch assembly is usually via two mutually parallel to the vertical axis of the press acting drives, each with a servo motor. The two servomotors work in master-slave mode to a largely synchronous

To ensure traversing movement of the two parallel drives along or parallel to the vertical axis.

It is extremely important that the movement of the two parallel drives is synchronous. Otherwise, misalignments could occur of displaceable and guided parts of the press along the press vertical axis. Depending on the design of the press, this relates to the die plate and / or the stamp plate, which are guided along a plurality of mutually parallel vertical guides. If a greater difference between their travel paths would occur between the two drives parallel to one another, the tool mounted on the die plate and / or on the stamp plate could be damaged. In the worst case, even the vertical guides of the die plate and / or the stamp plate and the drives can be damaged.

To prevent this, various measures in the field of software and electrical hardware are known and are used successfully. As a result, even in special modes and in special conditions of the press, such as immediate stop, emergency stop, power failure, etc., the drives are stopped in a controlled manner. Nevertheless, a small residual risk remains. If, for example, the communication connection between the two drive controllers necessary for master-slave operation is cut off, there is a risk that the two

Servo motors no longer work synchronously. In the worst case, the two servomotors would work against each other until they stopped. This would most likely lead to considerable damage to the tool and possibly to the press.

The invention has for its object to largely eliminate this residual risk.

This object is achieved by means of a powder press for producing a compact of a powdery material, with a frame, a punch assembly and a die assembly which defines a mold cavity into which the pul deformed material is fillable and then for forming the compact die assembly and the die assembly along a press vertical axis ZZ are movable relative to each other and pressed against each other, wherein the die assembly and / or the punch assembly of the powder press are designed according to the invention.

The inventive design of the die assembly is characterized in that a) the die assembly (4) connected to two parallel along the vertical axis Z-Z drive means (9, 10) connected Matrizenplatten- intermediate member (41) and a guide means (5, 6 , 7, 8) along the

Lifting or vertical axis Z-Z and guided with the Matrizenplatten- intermediate member (41) connected die plate (42); and

b) the die plate intermediate member (41) with a first drive means (9) by means of a first flexible connection means (1 1; 1 1 ') is connected and with a second drive means (10) by means of a second flexible

Connecting means (12; 12 ') is connected, wherein the first connecting means (1 1; 1 1') and the second connecting means (12; 12 ') are arranged on a first vertical line XX orthogonal to the press vertical axis ZZ; and c) the die plate intermediate member (41) and the die plate (42) by means of a third flexible connection means (13; 14, 15; 13 ';14', 15 ') which are arranged equidistant to the first flexible connection means (1) on a second straight line YY orthogonal to the press vertical axis ZZ and orthogonal to the first straight line XX 1, 1 1 ') and the second flexible

Connecting means (12; 12 ') is arranged such that the resulting tensile force or thrust transmitted by the third flexible connecting means (13; 14, 15; 13'; 14 ', 15') at a point on a through the center of gravity of the die plate (13). 42) extending vertical straight lines in the die plate (42) is initiated,

characterized in that

d) on the one hand: the first flexible connecting means on the first

Drive means (9) and on the die plate intermediate member (41) fixed first flexible connecting member (1 1; 1 1 '); and

the second flexible connecting means comprises a second flexible connecting member (12; 12 ') secured to the second drive means (10) and to the die plate intermediate member (41); and that

e1) on the other hand: the third flexible connection means on the

Die plate intermediate member (41) and fixed to the die plate (42) third flexible connecting member (13, 13 '); or

e2) said third flexible connection means comprises a third flexible link (14; 14 ') secured to said die plate intermediate member (41) and said die plate (42) and to said die plate intermediate member (41) and said die plate (42) Fourth flexible connecting member (15, 15 ').

The embodiment of the stamp arrangement according to the invention is characterized in that a ') the stamp arrangement (4) comprises a stamp plate intermediate member (41) connected to two drive means (9, 10) running parallel along the vertical axis ZZ and one to guide means (5, 6, 7, 8) guided along the stroke direction or vertical axis ZZ and with the stamp plate intermediate member (41) connected stamp plate (42); and

b ') the stamp plate intermediate member (41) is connected to a first drive means (9) by means of a first flexible connection means (1 1, 1 1') and with a second drive means (10) by means of a second flexible

Connecting means (12; 12 ') is connected, wherein the first connecting means (1 1; 1 1') and the second connecting means (12; 12 ') are arranged on a perpendicular to the press axis Z-Z orthogonal first straight line X-X; and c ') the stamp plate intermediate member (41) and the stamp plate (42) are interconnected by means of a third flexible connection means (13; 14, 15; 13'; 14 ', 15') arranged on a press vertical axis ZZ orthogonal and to the first straight line XX orthogonal second straight line YY equidistant from the first flexible connecting means (1 1; 1 1 ') and the second flexible

Connecting means (12; 12 ') is arranged such that the resulting tensile force or thrust transmitted by the third flexible connecting means (13; 14, 15; 13'; 14 ', 15') at a point on one through the center of gravity of the stamp plate ( 42) extending vertical straight lines in the stamp plate (42) is initiated,

characterized in that

d ') on the one hand: the first flexible connecting means on the first

Drive means (9) and on the stamp plate intermediate member (41) fixed first flexible connecting member (1 1; 1 1 '); and

e1 ') on the other hand: the third flexible connection means on the

Stamp plate intermediate member (41) and on the stamp plate (42) fixed third flexible connecting member (13, 13 '); or

e2 ') the third flexible connecting means comprises a third flexible connecting member (14; 14') fixed to the stamping plate intermediate member (41) and the stamping plate (42) and to the stamping plate intermediate member (41) and the stamping plate (42). fixed fourth flexible connecting member (15, 15 ').

Preferably, both the die assembly and the punch assembly in the manner described according to the invention

designed. It is particularly advantageous if the introduction of force takes place practically only in the vertical direction by the third flexible connection means in the center of gravity of the die plate or the stamp plate.

This structure of the present invention ensures that even if the difference between the traveling distance of the first drive means and the second drive means acting in parallel along the press elevation axis Z-Z (e.g., vertical direction), the traction or thrust force is very small

Tipping moment or practically without overturning moment in the die plate or in the stamp plate is entered.

In the powder press according to the invention, the introduction of force from the two parallel drives into the die plate and / or into the die plate takes place, depending on the design of the press, via a die plate intermediate member into the die plate and / or via a stamp plate intermediate member into the die plate. The two parallel drives, the

Die plate and / or the stamp plate are rigid structures, which due to their geometry, such as. relatively thick formation of the plate,

Stiffening ribs on the plate, etc., as well as due to the plate material, e.g. Steel, experienced under load only a small deformation.

In contrast, allow the flexible connection means, which are arranged on the one hand between each of the two drives and the intermediate member and on the other hand between an intermediate member

(Matrizenplatten intermediate member) and the die plate and / or between an intermediate member (stamp plate intermediate member) and the die plate are arranged, a deformation, in particular a bending of the flexible connecting means.

This can be a difference between the along the

Press stroke axis ZZ (eg vertical direction) extending travel of the first drive and the parallel acting second drive are transmitted under deformation of the first flexible connection means and the second flexible connection means on the intermediate member. This is the Intermediate member tilted about an axis of rotation which extends on the one hand orthogonal to the first straight line XX, which by the first flexible

Connecting means and extends through the second flexible connection means, and on the other hand extends orthogonal to the stroke direction Z-Z.

The axis of rotation or tilt axis of the intermediate member extends parallel to the second straight line Y-Y, on which the third flexible

Connecting means is arranged equidistant from the first flexible connection means and the second flexible connection means. The case of the intermediate member via the third flexible connection means on the die plate or on the stamp plate transmitted tilting moment is much smaller than the overturning moment that would be transmitted to the die plate or on the stamp plate, if the two drives with a travel difference directly on would act on the die plate or on the stamp plate.

As a result, misalignments along a plurality of mutually parallel guides guided die plate and / or stamp plate are significantly reduced, causing damage to the tool or the guides of the die plate and / or the stamp plate and the drives are effectively prevented.

The straight line X-X can be defined as the straight line along which the two drives are arranged, or more precisely, the straight line on which the points of contact of the first flexible one

Lying means and the second flexible connection means lie with the intermediate member. The straight line Y-Y orthogonal to the straight line X-X can be defined as the straight line on which or along which the third flexible connecting means is arranged, or more precisely, the straight line on which the points of contact of the third flexible link are located

Lying means with the die plate or with the stamp plate lie.

Preferably, the positions of the first straight line X-X, the second straight line Y-Y and the tilting axis of the intermediate link parallel thereto in the Z direction are identical or nearly identical. The Z position of the

Pivot tilt axis is typically, but not necessarily, between the Z position of the line XX and the Z position of the line YY. This measure has the effect that, when the intermediate member is tilted in response to a travel distance difference between the two drives, the third flexible connection means is practically not moved away from its equidistant position between the first flexible connection means and the second flexible connection means. Expediently, the straight line YY with the third flexible connection means and the tilting axis are arranged within a relatively small bandwidth of the Z position along the lifting axis ZZ about the Z position of the straight line XX. Preferably, this bandwidth ΔΖ, ie, this Z-interval is less than half, more preferably less than a quarter, of the X-distance between the first flexible connection means and the second flexible connection means along the line XX.

Preferably, the first flexible connecting means has a first flexible connecting member attached to the first driving means and to the intermediate member, and the second flexible connecting means has a second flexible connecting member fixed to the second driving means and to the intermediate member.

These links may be pin-shaped, conveniently having a small dimension D (e.g., pin cross-section diameter or pin cross-section diagonal) across the Z-direction and a large dimension L (length) along the Z-direction.

The connecting members may also be sheet-like, conveniently having a small dimension D (e.g., sheet thickness) transverse to the Z-direction and a large dimension L (length) along the Z-direction.

Depending on the nature of the material (steel, elastomer or composite material containing these materials), the links have an L / D ratio in the range of 4: 1 to 15: 1. The transverse dimension D of the pin-like or sheet-like links is preferably in the range of 1/20 to 1/8 of the X-distance between the first flexible link and the second flexible link along the line XX. Both Sheet-like flexible links is their smallest dimension (thickness D) in the X-direction, while their dimension in the Y-direction (width B) can be much larger and even greater than their dimension (length D) in the Z-direction , As a result, the leaf-like

Links in the transverse direction X very flexible, while they have virtually no flexibility in the transverse direction Y and in the longitudinal direction Z.

In a first variant also has the third flexible

Connecting means a fixed to the intermediate member and on the die plate or on the stamp plate third flexible connecting member which is located on the intermediate member on a lying on the vertical axis Z-Z central

Fastener location 0/0 / Z1 is attached, and that at the

Matrizenplatte or is attached to the stamp plate to a lying on the vertical axis Z-Z plate mounting location 0/0 / Z2. Preferably, this plate mounting location is close to the center of gravity of the die plate or the stamp plate. This first variant of the arrangement of the third flexible connection means forms a "single-point flexi-storage / suspension" and based on the typically symmetrical shape of the die plate or the stamp plate a "central flexi-storage / suspension".

In this one-point centralized flexi-storage / suspension, the plate mounting location 0/0 / Z2 for the die plate or die plate is preferably approximately or completely equidistant from the plate guides extending in the Z direction. With this measure, a registered in the die plate and / or stamp plate tilting moment can be further minimized or eliminated altogether.

In the case of a die plate or die plate, which is guided on three vertical parallel guides which traverse a horizontal sectional plane at the corners of an imaginary equilateral triangle, this storage / suspension is preferably under, in or above the

Focus of this imaginary triangle. Conveniently, in this case, the die plate or stamp plate also has the symmetry of this equilateral triangle, so that the center of gravity (center of mass) of the plate coincides with the center of gravity of the imaginary triangle.

In the case of a die plate or stamp plate, which is guided on four vertical parallel guides (typical design), which has a horizontal cutting plane at the corners of an imaginary square

traverse, this storage / suspension is preferably below, in or over the center of gravity of this imaginary square. Conveniently, also in this case, the die plate or stamp plate also has the symmetry of this equilateral square, so that the focus

(Center of mass) of the plate coincides with the center of gravity of the imaginary square.

In the more general case of a die plate or die plate, which is guided on N vertical parallel guides which are horizontal

Cutting plane at the corners of an imaginary regular N-corner

Preferably, this storage / suspension is located below, in or above the center of gravity of this imaginary regular N-corner.

Conveniently, also in this case, the die plate or

Stamp plate also the symmetry of this regular N-corner, so that the center of gravity (center of mass) of the plate coincides with the focus of the regular N-corner.

In a second variant also has the third flexible

Connecting means a third flexible connecting member and fourth flexible connecting member attached to the intermediate member and on the die plate or on the stamp plate, which at the intermediate member at a first intermediate attachment location 0 / Y4 / Z1 or at a second intermediate attachment location 0 / Y5 / Z1 are attached and which are fixed to the die plate or to the stamp plate at a first plate mounting location 0 / Y4 / Z2 or at a second plate mounting location 0 / Y5 / Z2, wherein the intermediate member mounting locations 0 / Y4 / Z1 and 0 / Y5 / Z1 on a to

Vertical axis ZZ are orthogonal first straight lines and wherein the plate mounting locations 0 / Y4 / Z2 and 0 / Y5 / Z2 lie on a second straight line orthogonal to the vertical axis ZZ and parallel to the first straight line. Preferably, these plate mounting locations are close to

Center of gravity of the die plate or plate, i. the second straight line with the plate mounting locations runs close to the center of gravity of the plate or through the plate center of gravity. This second variant of the arrangement of the third flexible connection means forms a "multi-point flexi-storage / suspension" with decentralized, rectilinearly distributed

Storage / suspension points.

This second variant is suitable for die plates or stamp plates, which is guided on four vertical parallel guides

(typical version), which traverse a horizontal cutting plane at the corners of an imaginary square or rectangle. In this case, this rectilinearly distributed mounting / suspension preferably runs parallel below, congruent with or above a symmetry aisle running through the center of gravity of this imaginary square or rectangle.

Conveniently, also in this case, the die plate or

Stamp plate also the symmetry of this square or rectangle, so that the center of gravity or the symmetry of the plate with the

Center of gravity or symmetry of the imaginary square or rectangle coincides.

The flexible connecting means are preferably in the direction of power transmission during a pressing operation, i. along the lifting axis Z-Z rigid, while they are flexible in a direction orthogonal to the lifting axis Z-Z. As a result, during the pressing process, the forces acting along the lifting axis Z-Z of the two drives on the first flexible

Connecting means and the second flexible connecting means on the

Intermediate link and from this via the third flexible connecting means (variant 1: single-point flexi storage / suspension, or variant 2: multipoint flexi storage / suspension) are transmitted to the die plate or on the stamp plate. This mechanical power train along the lifting axis ZZ is very rigid, while the flexibility of the connecting means on both sides of the preferably rigid intermediate member allows tilting of the intermediate member, whereby a path difference between the two drives compensated and kept away from the die plate or the stamp plate.

In an advantageous embodiment of the powder press one or both of the flexible connecting members between the drives and the intermediate member are each formed by a parallel to the vertical axis ZZ elastically stretched pin-like or sheet-like member extending through a respective through hole of the intermediate member, wherein a first end of the respective pin-like or sheet-like member is connected to a respective drive means and a second end of the respective pin-like or sheet-like member is connected to the intermediate member.

Preferably, one or both are flexible

Connecting members in each case a screw / spacer unit whose respective spacer is clamped between the facing sides of the respective drive means and the intermediate member by means of the respective screw, wherein the respective screw extends through the respective through hole of the intermediate member and from the respective spacer ring-like or surrounded like a sleeve, wherein preferably a first end of the respective screw in a

Threaded hole of the respective drive means is screwed and formed as a screw head second end of the respective screw rests against the intermediate member in the region of the through hole.

The spacer may be formed differently, e.g. sleeve-like, in particular as a sleeve or as a spiral spring, or like a ring, in particular as a flat annular disk or as a plate spring (truncated cone).

Preferably, the spacer has at its two ends, by means of which it bears against the respective drive means and bears against the intermediate member, each having a flange-like end-side abutment surface.

The sleeve-like spacer and the diaphragm spring are preferably made of a high modulus material, such as steel. The flat annular disc may consist of a material with a high modulus of elasticity, eg steel, or of a material with a small modulus of elasticity, eg elastomer. The function of the spacer and the flexibility can be achieved by combining the aforementioned annular and sleeve-like spacers by a certain combination of such spacers placed over the threaded portion of the screw, stacked thereon and finally compressed by screwing the screw and thus biased. Thus, one can adjust the hardness and thereby the flexibility of the resulting composite spacer (composite spacer) by both the nature of the combination and the extent of compression of the one or more spacers.

Alternatively or additionally, one or both of the flexible links may each be formed by a spring leaf unit whose respective spring leaf, which is a sheet-like spacer, extends in a plane orthogonal to the first straight line XX, with a first end of the respective spring leaf having the respective one Drive means eg is firmly connected by a first clamping member unit and a second end of the respective spring leaf with the intermediate member, e.g. is firmly connected by a second clamping member unit.

The first clamping member unit and the second clamping member unit preferably each comprise two clamping bars which are connected to the drive means or to the intermediate member, e.g. can be fixed by screws, whereby in each case a clamping gap for receiving one of the two edges of the spring leaf is formed. Between the two terminal strips one of the two edges of the spring leaf is clamped. Preferably, this is

Through holes in the two terminal strips and provided in the spring leaf to be clamped, which come together with inserted in the nip spring leaf to cover and by means of a through this

Through holes extending screw / nut arrangement can be fixed. As a result, the spring leaf sits frictionally and positively in the nip between the two terminal strips firmly.

Again, the function of the spacer and the flexibility by combination of the mentioned sheet-like spacers or spring leaves can be achieved by a certain combination of such spacers or spring leaves are fixed to each other as described above in the nip. Thus, one can also adjust the hardness and thereby the flexibility of the resulting composite spring leaf spacer (composite spacer) by the nature of the combination of the plurality of parallel spring leaf spacers.

In a further advantageous embodiment of the powder press one or both of the flexible connecting members are mounted spherically at least at one of their ends. This results in addition to the achieved by the flexibility of the links movement possibilities of the intermediate member with respect to the drive means and the die plate or

Stamp plate another possibility for movement by a relative movement between two adjacent spherical surface sections in the

spherical storage. It is particularly advantageous if the spherical bearing is coupled with an elastic return means, which holds the intermediate member in a non-tilted position in its neutral torque-free position.

Alternatively or additionally, one or both of the flexible connecting members may be mounted cylindrically at least at one of their ends, wherein the cylinder axis or axis of rotation of the bearing parallel to

Straight line Y-Y extends. This results in addition to the by the

Flexibility of the links reached movement possibilities of the intermediate member with respect to the drive means and the die plate or

Stamp plate another possibility of movement by a relative movement between two adjacent cylindrical surface sections in the cylindrical bearing. It is also particularly advantageous if the cylindrical bearing is coupled with an elastic return means, which holds the intermediate member in a non-tilted position in its neutral torque-free position.

During the spherical bearing two spatial degrees of freedom of the link relative movement with respect to the drive means, with respect to the intermediate member or with respect to the die plate or stamp plate allows the cylindrical storage only a spatial

Degree of freedom of this link relative movement. The cylindrical bearing is therefore particularly well in combination with a

sheet-like flexible link.

Similar to the first flexible connection means (e.g., with a first flexible connector) and the second flexible connection means

Connecting means (e.g., a second flexible connecting member) also apply to the third flexible connecting means (e.g., a third flexible connecting member according to a first arrangement or, for example, third and fourth flexible connecting members according to a second arrangement).

In an advantageous embodiment of the powder press, the one or two other flexible connecting members are each formed by a parallel to the vertical axis ZZ elastically tensioned pin-like or sheet-like member which extends through a respective through hole of the die plate or on the die plate, wherein a first end the respective pin-like or sheet-like member is connected to the intermediate member and a second end of the respective pin-like or sheet-like member is connected to the die plate or to the die plate.

Preferably, the one or two other flexible connecting members are each a screw / spacer / unit whose respective spacers between the mutually facing sides of the die plate or the stamp plate and the intermediate member is clamped by means of the respective screw, wherein the respective screw through the respective through hole of the die plate or the stamp plate extends and is surrounded by the respective spacer ring-like or sleeve-like, preferably a first end of the respective screw is screwed into a threaded bore of the intermediate member and designed as a screw head second end of the respective screw on the die plate or . abuts the stamp plate in the region of the through hole. Again, the spacer may be formed differently, such as sleeve-like, in particular as a sleeve or as a spiral spring, or ring-like, in particular as a flat annular disc or as a plate spring

(Truncated cone). Preferably, the spacer at its two ends, by means of which it rests against the respective drive means and on the

Pusher abuts, each a flange-like end-side contact surface.

The sleeve-like spacer and disc spring are also preferably made of a high modulus material, such as, e.g. Steel, while the planar annular disc is made of a high modulus material, e.g. Steel, or a low modulus material, e.g. Elastomer, can exist.

Again, the function of the spacer and the flexibility by combining the aforementioned ring-like and sleeve-like

Spacers can be achieved by putting a certain combination of such spacers over the threaded portion of the screw, stacked on it and finally compressed by screwing the screw and thus biased. Thus, also here, the hardness and thereby the flexibility of the resulting composite spacer (composite spacer) can be determined both by the nature of the combination and by the extent of compression of the one or more

Set spacer.

Alternatively or additionally, the one or the other further flexible connecting members may each be formed by a leaf spring / clamping member unit, whose respective spring leaf, which is a sheet-like spacer, extending in a direction orthogonal to the first straight line XX, wherein a first end of the respective Spring leaf is firmly connected to the intermediate member by means of a first clamping member unit and a second end of the respective spring leaf with the die plate or with the stamp plate by means of a second clamping member unit is firmly connected.

Again, the first clamping member unit and the second clamping member unit preferably each contain two terminal strips, the Drive means or on the intermediate member can be fixed, for example by screws, whereby in each case a clamping gap for receiving one of the two

Edge of the spring leaf is formed. Between the two

Terminal strips is clamped one of the two edges of the spring leaf. Here, too, preferably through holes in the two terminal strips and in the clamped spring leaf are provided for this purpose, which in in the

Clamping gap inserted spring leaf come together to cover and extending through these through holes

Screw / nut arrangement can be fixed. That's how it sits

Federblatt also here frictionally and positively in the nip between the two terminal strips firmly.

Again, the function of the spacer and the flexibility can be achieved by combining the mentioned sheet-like spacers or spring leaves by a certain combination of such spacers or spring leaves are fixed to each other as described above in the nip. Thus, one can also adjust the hardness and thereby the flexibility of the resulting composite spring leaf spacer (composite spacer) by the nature of the combination of the plurality of parallel spring leaf spacers.

In a further advantageous embodiment of the powder press, the one or both further flexible connecting members are mounted spherically at least at one of their ends. This results in addition to the achieved by the flexibility of the links movement possibilities of the intermediate member with respect to the drive means and the

Die plate or stamp plate another movement possibility by a relative movement between the two adjacent spherical surface sections in the spherical bearing. Again, it is particularly advantageous if the spherical bearing is coupled with an elastic return means, in its neutral torque-free position the

Holding intermediate member in a non-tilted position.

Alternatively or additionally, here too, the one or the other further flexible connecting members can at least at one of their ends be mounted cylindrical, wherein the cylinder axis or axis of rotation of the bearing extends parallel to the straight line YY. As a result, in addition to the movement possibilities of the intermediate member with respect to the drive means and the die plate or die plate, which is achieved by the flexibility of the connecting members, there is also a further possibility of movement due to a relative movement between two adjoining ones

Cylindrical surface sections in the cylindrical bearing. It is also particularly advantageous if the cylindrical bearing with a

elastic return means is coupled, which in its neutral

torque-free position holds the intermediate member in a non-tilted position. The cylindrical storage is also particularly well in here

Combination with a sheet-like flexible link.

In a particularly advantageous embodiment of the powder press, the stiffness or the flexibility of the flexible connection means are adjustable. This adjustability of the flexibility is achieved by a combination of individual components of a respective flexible link, as described above with reference to the ring-like or sleeve-like flexible spacers or the sheet-like flexible spacers. Another adjustability is achieved by additionally one or both ends of one or more flexible connecting members is suspended spherically or cylindrically and is provided with an elastic return means, as also described above.

In the powder press, one or more of the flexible links may each comprise a pin-like member having a first pin end and a second pin end, and a sleeve-like member surrounding the pin-like member at least along part of its length between the two pin ends and along part of its circumferential direction.

In particular, the pin-like member and the sleeve-like member may have a conical region on their surfaces facing each other.

One or more of the flexible links may be made of steel, preferably also the intermediate piece and the

Die plate or stamp plate made of steel. One or more of the flexible links may comprise a thin walled material having a wall thickness in the range of 2mm to 10mm, preferably 3mm to 6mm, the spacer and die plate preferably being a thick walled material having a plate thickness in the range of 20mm to 300mm

exhibit.

One or more of the flexible links may be composed of a plurality of thin-walled layers of an elastic material, while the intermediate piece and the die plate consist of a one-piece block of material.

One or more of the flexible connecting members may be formed as a composite body having adjoining one another, extending along the longitudinal direction of the connecting member between the first end and the second end extending alternating layers of a polymer material or a metal material.

Other advantages, features and applications of the invention will become apparent from the following, not limiting

To be summarized description of preferred embodiments of the invention with reference to the drawing. Show it:

Fig. 1 is a perspective view of a first arrangement

(Matrizenanordnung or stamp assembly) schematically illustrated inventive elements of a powder press according to the invention;

Fig. 2 is a perspective view of a second arrangement

3 is a plan view along the direction ZZ (see FIG. 2) of the elements of the second arrangement according to a first embodiment shown in more detail (see FIG. 10A, FIG. 1A or FIG. 10B, FIG. 1B); 4 shows a side view in the direction YY (see FIG. 3) of the elements of the second arrangement according to the first section cut along a vertical plane passing through the straight line XX (see FIG. 3)

Execution;

5 shows a side view in the direction X-X (see FIG. 3) of the elements of the second arrangement according to the first section cut along a vertical plane passing through the straight line Y-Y (see FIG. 3)

Execution;

Fig. 6 is a perspective view of the cut corresponding to FIG. 4

Elements;

Fig. 7 is a perspective view of the cut according to FIG. 5

Elements;

FIG. 7A is an enlarged view of the circled portion of FIG. 7; FIG.

Fig. 8 is a perspective view of the corresponding to FIG. 3 shown

Elements;

FIG. 9 is an exploded perspective view of the elements shown in FIGS. 3 to 8; FIG.

10A and FIG. 1A show a vertical section of a connection element shown in more detail according to a first variant of the first embodiment, which is installed in a first area of the arrangement or in a second area of the arrangement;

Fig. 10B and Fig. 1 1 B is a vertical section of a connector shown in more detail according to a second variant of the first embodiment, which is installed in a first region of the assembly or in a second region of the assembly; 10C and 1 1 C is a vertical section of a connector shown in more detail according to a first variant of a second embodiment, which is installed in a first region of the assembly or in a second region of the assembly.

Fig. 10D and Fig. 1 1 D is a vertical section of a connector shown in more detail according to a second variant of a second embodiment, which is installed in a first region of the assembly or in a second region of the assembly; and

FIG. 12 is a plan view, similar to FIG. 3, of the more detailed illustrated elements of the second arrangement according to the second embodiment. FIG

Embodiment (see Fig. 10C, Fig. 1 1 C and Fig. 10D, Fig. 1 1 D), wherein the respective connecting members along a horizontal plane E-E

are shown cut.

In Fig. 1 is a perspective view of a first arrangement of inventive elements 9, 10, 1 1, 12, 13, 41, 42 a

shown powder press according to the invention. This schematic arrangement 4 relates both to a matrix arrangement 4 according to the invention and to a stamp arrangement 4 according to the invention.

This first arrangement 4 according to FIG. 1 corresponds to the variant e1) described above, in which the third flexible connecting means has a third flexible connecting member 13 or 13 'attached to the die plate intermediate member 41 and to the die plate 42, preferably only one.

This first arrangement 4 according to FIG. 1 also corresponds to the variant e1 'described above, in which the third is flexible

Connecting means, preferably only one, on the Stempelplatten- intermediate member 41 and on the die plate 42 fixed third flexible connecting member 13 or 13 'has. In Fig. 2 is a perspective view of a second arrangement of inventive elements 9, 10, 1 1, 12, 14, 15, 41, 42 a

This second arrangement 4 according to FIG. 2 corresponds to the variant e2) described above, in which the third flexible connection means comprises a third flexible connecting member 14 or 14 'fastened to the die plate intermediate member 41 and the die plate 42 and to the die plate intermediate member 41 and secured to the die plate 42 fourth flexible connecting member 15 or 15 '

This second arrangement 4 according to FIG. 2 also corresponds to the variant e2 'described above, in which the third is flexible

Connecting means comprises a third flexible connecting member 14 or 14 'fixed to the stamp plate intermediate member 41 and the stamp plate 42 and a fourth flexible connecting member 15 or 15' fixed to the stamp plate intermediate member 41 and the stamp plate 42

Fig. 1 and Fig. 2 are schematic representations for explaining the principle of operation of the invention.

The powder press includes a frame, a punch assembly, and a die assembly that defines a mold cavity into which the powdered material is fillable. These parts of the powder press are not shown in Fig. 1 and in Fig. 2. To form a compact of a powdery material, the punch assembly and the

Matrizenanordnung be moved relative to each other along the press vertical axis Z-Z and pressed against each other.

In the following, the two terms "intermediate member 41" and "die plate intermediate member 41" are used interchangeably. Likewise, the two terms "intermediate member 41" and "stamp plate intermediate member 41" are used interchangeably. Furthermore, what has been said for a die plate 42 applies analogously to a stamp plate 42 and vice versa.

The first arrangement shown in Fig. 1 essentially comprises a die assembly 4 with a die plate 42 and a punch assembly 4 with a die plate 42, a first drive means 9 and a second

Drive means 10 and an intermediate member 41st The die plate or

Stamp plate 42 is guided on guide means (not shown in Fig. 1) along the stroke direction or vertical axis Z-Z.

Between the first drive means 9 and the intermediate member 41, a first flexible connecting member 1 1 is arranged, which can transmit shear forces and tensile forces along the stroke direction Z-Z between the first drive means 9 and the intermediate member 41. Between the second

Drive means 10 and the intermediate member 41 is also a second flexible connecting member 12 is arranged, which can transmit shear forces and tensile forces along the stroke direction Z-Z between the second drive means 10 and the intermediate member 41. The two flexible connecting links 1 1 and 12 define a first straight line X-X. There could also be more than two such point-like flexible links along this line X-X.

Between the intermediate member 41 and the die plate 42, a third flexible connecting means 13 is arranged, the thrust and

Tensile forces can be transmitted along the stroke direction Z-Z between the intermediate member 41 and the die plate 42, wherein the resultant force of the shear forces and tensile forces transmitted by the flexible connecting means 13 is introduced into the die plate 42 virtually torque-free along the stroke direction Z-Z. The third flexible connecting means 13 is for this purpose formed as a third flexible connecting member 13 which is arranged at a location on the straight line Z-Z equidistant from the location of the first flexible connecting member 1 1 and the location of the second flexible connecting member 12.

Defining the intersection of the line XX with the line ZZ as the origin (0/0/0) of a rectangular coordinate system (X / Y / Z), then, this third flexible link 13 is located at a location on the Z-axis and is fixed to the link 41 at a pontic attachment location (0/0 / Z1) and at a plate attachment location (0/0 / Z2) at the Matrizenplatte 42 attached. Therefore, the dimension of the third flexible link 13 in the Z-direction is ΔΖ = | Z2 - Z1 1.

Measured in these coordinates, the first drive means 9 is fixed to the intermediate member 41 at an intermediate member attachment location (X1 / 0/0), and the second drive means 10 is fixed to the intermediate member 41 at an inter-member attachment location (X2 / 0/0) these two intermediate link mounting locations are arranged symmetrically to the lifting axis ZZ, ie X2 = - X1.

The first arrangement described here represents a central, point-point, one-point flexi mounting of the die plate 42. The term "central" should be understood to mean that the introduction of force into the die

Die plate 42 is made torque-free via the third connecting means 13, so that even on the guides of the die plate 42 (see, for example, 5, 6, 7, 8 in Fig. 8) no torques are entered through the die plate 42.

The second arrangement shown in Fig. 2 is similar in construction to the first arrangement of Fig. 1 and substantially includes the

Die assembly 4 with the die plate 42 and the punch assembly 4 with the die plate 42, the first drive means 9 and the second

Drive means 10 and the intermediate member 41st The die plate 42 is also guided on guide means (not shown in FIG. 1) along the stroke direction or vertical axis Z-Z.

Between the first drive means 9 and the intermediate member 41, the first flexible connecting member 1 1 is arranged, which can transmit shear forces and tensile forces along the stroke direction Z-Z between the first drive means 9 and the intermediate member 41. Between the second

Drive means 10 and the intermediate member 41 is the second flexible

Link member 12 is arranged, the thrust forces and tensile forces along the stroke direction ZZ between the second drive means 10 and the Intermediate member 41 can transmit. The two flexible connecting links 1 1 and 12 also define the first straight line XX, and more than two such point-like flexible connecting links could also be arranged along this straight line XX.

Between the intermediate member 41 and the die plate 42, a third flexible connecting means 13 is also arranged, the

Shearing forces and tensile forces along the stroke direction Z-Z between the

Intermediate member 41 and the die plate 42 can transmit, whereby also here the resulting force of the flexible connecting means 13th

transmitted shear forces and tensile forces virtually torque-free along the stroke direction Z-Z in the die plate 42 is initiated. In contrast to the first arrangement shown in FIG. 1, in this second arrangement, the third flexible connection means 13 is designed for this purpose as the third flexible connection member 14 and fourth flexible connection member 15, which are spaced apart from one another at positions symmetrical to the lifting axis ZZ on a second straight line YY which extends orthogonal to the first straight line XX and orthogonal to the stroke axis ZZ-. The third link 14 and the fourth link 15 are each at one location on the second

Straight lines Y-Y are each equidistant from the location of the first flexible one

Connecting member 1 1 and arranged from the location of the second flexible connecting member 12.

Again, defining the intersection of the line XX with the line ZZ as the origin (0/0/0) of a rectangular coordinate system (X / Y / Z), the third flexible link 14 is at a first location on the Y axis and is fixed to the link 41 at a link attachment location (0 / Y4 / Z1) and fixed to the die plate 42 at a board mounting location (0 / Y4 / Z2), and the fourth flexible link 15 is at a second location on the Y-axis and is fixed to the intermediate member 41 at a pontic attachment location (0 / Y5 / Z1) and fixed to a plate attachment location (0 / Y5 / Z2) on the die plate 42. The dimension of the third flexible

Connecting member 14 and the fourth flexible connecting member 15 in the Z direction is therefore ΔΖ = | Z2 - Z1 1. Measured in these coordinates, the third link 14 and the fourth link 15 are arranged symmetrically to the stroke axis ZZ, ie Y5 = - Y4.

Again, the first drive means 9 is fixed to the intermediate member 41 at an intermediate member mounting location (X1 / 0/0), and the second drive means 10 is fixed to the intermediate member 41 at an intermediate member mounting location (X2 / 0/0), both of these Zwischenglied- mounting locations are arranged symmetrically to the lifting axis ZZ, ie X2 = - X1.

The second arrangement described here represents a decentralized, rectilinearly distributed multipoint flexi-bearing of the die plate 42. The term "decentralized" is understood to mean that the introduction of force into the die plate 42 takes place torque-free via the third connecting means 13, 14 that also on the guides of the die plate 42 (see eg 5, 6, 7, 8 in Fig. 8) no torques are entered through the die plate 42.

The third connecting means 13 of the first arrangement (with a central connecting member 13 on the lifting axis Z-Z) can also in

Combination with the third connecting means 14, 15 of the second arrangement (with two decentralized to the lifting axis Z-Z arranged symmetrically

Connecting members 14, 15) are combined, so that there is a third arrangement (not shown) having a third flexible connecting means 13, 14, 15, which consists of a third link 13, a fourth link 14 and a fifth link 15th

wherein the third flexible link 13 is arranged at a location (0/0 / Z ^* ) on the Z-axis and the fourth link 14 and the fifth link 15 are symmetrical to the stroke axis ZZ at a location (0 / Y4 / Z ^* ) or at a location (0 / Y5 / Z ^* ), where Y5 = - Y4.

A first embodiment (pin formation) of the second arrangement described above is shown in various illustrations in FIGS. 3 to 9. 3 shows the die plate 42, which has an approximately rectangular plan. The die plate 42 has at four diametrically opposite corner regions of its rectangular-like outline each have a sleeve-like formation 42a, 42b, 42c, 42d, each with a cylinder bore whose cylinder axis extends parallel to the Hubachse ZZ. On its upper side, the die plate 42 has a substantially flat surface 42e to which application specific tools can be mounted. For this purpose, numerous mounting holes in the surface 42e are provided. By means of the four cylinder bores in the four sleeve-like formations 42a, 42b, 42c, 42d, the die plate 42 is mounted on four cylindrical guides 5, 6, 7, 8, as best seen in FIG. These guides 5, 6, 7, 8 extend parallel to one another in the Z direction parallel to the lifting axis ZZ. As a result, the die plate 42 can be displaced along the lifting axis ZZ.

In the plan view of Fig. 3 can also be seen the intermediate member 41 which is disposed below the die plate 42 and partially hidden by this. In the hidden area, the outline of the intermediate member 41 is shown in dashed lines. The intermediate member 41 has in its plan view outline four bulges 41 a, 41 b, 41 c, 41 d, each having a vertical

Having through hole or a vertical bore. In this vertical through hole and through this extends in each case one of four connecting links 1 1, 12, 14, 15th

The location of the link 1 1 and the link 12 in plan view are in a horizontal direction, i.

orthogonal to the stroke axis Z-Z extending first straight line X-X. The

Link 1 1 extends through the vertical hole of the bulge 41 b of the intermediate member 41 therethrough and is fixed with its lower end to the drive means 9, as best in the side view of Fig. 4 or in the perspective view of Fig. 6 with the Section along the vertical plane XX (see Fig. 3) detects. The connecting member 12 extends through the vertical hole of the bulge 41 d of the intermediate member 41 therethrough and is fixed with its lower end to the drive means 10, as can also best seen in Fig. 4. In the plan view of Fig. 3 can also be seen a bulge 42f and a bulge 42g of the die plate 42, which also each have a vertical through hole or a vertical bore. In each case one of the two connecting members 14, 15 extends in this vertical through hole and through it.

The location of the link 14 and the link 15 in plan view are in a horizontal direction, i.

orthogonal to the stroke axis Z-Z extending and also to the first straight line X-X orthogonal second straight line Y-Y. The connecting member 14 extends through the vertical hole of the bulge 42 f of the die plate 42 and is attached at its lower end to the bulge 41 a of the intermediate member 41, as best in the side view of Fig. 5 and in the Perspektivanischt of FIG Fig. 7 recognizes the section along the vertical plane YY (see Fig. 3). The connecting member 15 extends through the vertical hole of the bulge 42 g of the die plate 42 and is secured at its lower end to the bulge 41 c of the intermediate member 41, as also best seen in Fig. 5.

FIG. 9 is an exploded perspective view of the elements shown in FIGS. 3 to 8.

One recognizes the two acting in the vertical direction Z drive means 9 and 10, the intermediate member 41 and guided on the guides 5, 6, 7 and 8 die plate 42. In addition, four screws S are shown, each associated with an annular disc R and a sleeve H. are. These four screw-washer-sleeve combinations SRH each form one of the above-mentioned flexible connecting members n, 12, 14, 15, wherein the two flexible connecting members 1 1, 12 for the flexible connection of the two upper ends of the two drive means 9, 10 with the

Intermediate member 41 are used (see, for example, Fig. 4 and Fig. 6) and wherein the two flexible connecting members 14, 15 for flexible connection of the

Intermediate member 41 with the die plate 42 serve (see, for example, Fig. 5, Fig. 7 and Fig. 7A). In the assembled state of the drive means 9, 10, the

Intermediate member 41 and the die plate 42 having arrangement are Bolts S each under tension, ie elastically elongated in the Z direction, while the annular disc R and the sleeve H are each stretched under pressure, ie elastically shortened in the Z direction.

In Fig. 10A is a vertical section of a connector shown in more detail 1 1 or 12 according to a first variant (single screw with sleeve) of the first embodiment (pin formation) shown in a

Region between the drive means 9 and the drive means 10 and the intermediate member 41 is arranged. In this case, the screw S protrudes through

Through hole L in the intermediate member 41 and through a sleeve H and is screwed with its lower end or tip Sa into a threaded hole G at the upper end of the drive means 9 and 10, while the upper end or the head Sb of the screw his shoulder on the

Ring disc R rests, in turn, on the through hole L

surrounding upper surface of the intermediate member 41 rests. The sleeve H has at its lower end and at its upper end in each case a flange-like expansion Ha or Hb, wherein the lower flange-like expansion Ha rests on a threaded bore G surrounding upper surface of the drive means 9 and 10 and the upper flange-like expansion Hb one that

Through hole L surrounding lower surface of the intermediate member 41 is present. The two units of tensioned screw S, strained annular disc R and strained sleeve H thus formed are clamped between the drive means 9 and 10 and the intermediate member 41 and form the first flexible connecting member 1 1 and the second flexible connecting member 12th

In Fig. 11A is a vertical section of a detailed illustrated connecting member 14 or 15 according to the first variant (single screw with sleeve) of the first embodiment (pin formation) shown in a

Region between the intermediate member 41 and the die plate 42 is arranged. In this case, the screw S protrudes through a through hole L in the

Between plate 42 and through the sleeve H through and is screwed with its lower end or its tip Sa into a threaded bore G at an upper side of the intermediate member 41, while the head Sb of the screw rests with its shoulder on the annular disc R, which in turn on the the through hole L surrounding upper surface of the die plate 42 rests. The sleeve H has at its lower end and at its upper end in each case the flange-like expansion Ha or Hb, wherein the lower flange-like

Expansion Ha on which the threaded hole G surrounding upper side of the intermediate member 41 rests and the upper flange-like expansion Hb is applied to a surrounding the through hole L lower surface of the die plate 42. The thus formed two units of tensioned screw S, strained annular disc R and strained sleeve H are between the

Clamped intermediate member 41 and the die plate 42 and form the third flexible connecting member 14 and the fourth flexible connecting member 15 of the second arrangement (multi-point flexi storage / suspension).

Of course, the third link 13 of the first arrangement (single-point flexi-bearing / suspension) may also have the structure described in FIG. 1A. Conveniently, however, it would be somewhat larger than the first connecting member 1 1 and the second

Connecting member 12 of this first arrangement.

The flexibility of the pin-like links 1 1, 12, 13, 14, 15 shown in Fig. 10A and Figs. by the length and / or the wall thickness of the sleeve H and by the choice of

Material of the sleeve H can be adjusted. An enlargement / reduction of the length of the sleeve H leads to an increase / decrease in the flexibility of the connecting member. An enlargement / reduction of the wall thickness of the sleeve H leads to a reduction / enlargement of the flexibility of the connecting member. An enlargement / reduction of the modulus of elasticity of the material of the sleeve H leads to a

Enlargement / reduction of the flexibility of the link.

In Fig. 10B is a vertical section of a detailed illustrated link 1 1 or 12 according to a second variant (double screw with plate spring) of the first embodiment (pin formation) shown, which is arranged in a region between the drive means 9 and the drive means 10 and the intermediate member 41 is. In this case, a first screw S1 protrudes through a first through hole L1 in the intermediate member 41 and through a

Cup spring stack T through and protrudes with its lower end S1 a in second through hole L2 in a mounting region of the drive means 9 and 10, while the upper end or the head S1 b of the first screw S1 rests with its shoulder on a first annular disc R1, which in turn rests on a second annular disc R2, which finally on the the first through-hole L1 surrounding upper surface of the intermediate member 41 rests in an annular recess. In addition, a second screw S2 protrudes into the second through-hole L2 in the attachment area of the

Drive means 9 and 10, respectively. The upper end S2a of the second screw S2 is sleeve-shaped and has inside the sleeve portion S2a an internal thread which engages with a complementary male thread on the cylindrical tip S1a of the first screw S1, while the lower end or the head S2b of the second screw S2 rests with its shoulder on a lock nut M, which in turn on a third

Ring disc R3 abuts, which in turn abuts a fourth annular disc R4, which finally rests on the second through hole L2 surrounding lower surface of the mounting portion of the drive means 9 and 10 in an annular recess. The plate spring stack T has a similar function as the sleeve H of the first variant (see Fig. 10A).

The plate spring stack T has at its lower end a lower plate spring Ta and at its upper end an upper plate spring Tb, each with its large annular surface, the lower and upper face of the plate spring stack T form (similar to the flange-like expansion Ha or Hb of Sleeve H in Fig. 10A), wherein the lower plate spring Ta rests on a second through hole L2 surrounding the upper surface of the drive means 9 and 10 and the upper plate spring Tb at one of the first

Through hole L1 surrounding the lower surface of the intermediate member 41 is present.

The first screw S1 and the second screw S2 are screwed together in the assembled state, wherein the plate spring stack T is compressed in the Z direction. The two units thus formed each contain the two strained screws S1, S2, the four strained

Ring washers R1, R2, R3, R4, counter nut M and the tensioned

Disc spring stack T and are between the drive means 9 and 10 and the Clamped intermediate member 41. They form the first flexible connecting member 1 1 and the second flexible connecting member 12th

The contact area 81 between the first annular disc R1 and the second annular disc R2 and the contact area 82 between the third annular disc R3 and the fourth annular disc R4 are each formed by a pair of contacting spherical surfaces, namely a concave spherical surface on the first annular disc R1 and a convex spherical surface on the second annular disc R2, both having the same radius of curvature with respect to the common center Z of an imaginary spherical surface, which is indicated in Fig. 10B as a dashed circle. In addition, between the inner surface of the hole of the second annular disc R2 and the Außenf surface of the first screw S1 and between the

Inner surface of the first through hole L1 of the intermediate member 41 and the outer surface of the first screw S1, a first annular gap 71 is present. Similarly, between the inner surface of the hole of the fourth annular disc R4 and the outer surface of the second screw S2 and between the inner surface of the second through-hole L2 at

Drive means 9 and 10 and the outer surface of the second screw S2, a second annular gap 72 is present. Between the first annular disc R1 and the first screw S1 and between the third annular disc R3 and the second screw S2, there is no radial play or much less radial clearance than in the gap regions 71 and 72.

When mounting the thus formed connecting members 1 1, 12 of the plate spring stack T is compressed, whereby the respective

abutting spherical surfaces of the first annular disc R1 and the second annular disc R2 and the third annular disc R3 and the fourth annular disc R4 are pressed against each other. The flexibility of the connecting links 1 1, 12 (see FIGS. 4 and 6) thus formed is based on the play in the gap areas 71, 72 on the elastic deformability of the bridge

Cup spring stack T and on the possibility of sliding together the first and second annular disc R1, R2 in the first contact area 81 and on the possibility of sliding together the third and fourth annular disc R3, R4 in the second contact area 82nd In Fig. 11 B is a vertical section of a connector shown in more detail 14 or 15 according to the second variant (double screw with disc spring) of the first embodiment (pin formation) is shown, which is arranged in a region between the intermediate member 41 and the die plate 42. In this case, the first screw S1 protrudes through a first through hole L1 in the die plate 42 and through a plate spring stack T and protrudes with its lower end S1 a in a second through hole L2 in the

Fixing portion of the intermediate member 41, while the upper end or the head S1 b of the first screw S1 rests with its shoulder on the first annular disc R1, which in turn rests on the second annular disc R2, which finally on the first through hole L1 surrounding upper surface of Matrizenplatte 42 rests in an annular recess. In addition, the second screw S2 protrudes into the second through hole L2 in the attachment portion of the intermediate member 41. The upper end S2a of the second screw S2 is sleeve-like and has inside the

Sleeve section S2a an internal thread, which is engaged with a complementary external thread on the cylindrical tip S1 a of the first screw S1, while the lower end or the head S2b of the second screw S2 abuts with its shoulder on the lock nut M, which in turn third annular disc R3 abuts, which in turn abuts the fourth annular disc R4, which finally rests on the second through hole L2 surrounding lower surface of the mounting portion of the intermediate member 41 in an annular recess. The plate spring stack T has a similar function as the sleeve H of the first variant (see Fig. 1 1 A).

The plate spring stack T has at its lower end a lower plate spring Ta and at its upper end an upper plate spring Tb, each with its large annular surface, the lower and upper face of the plate spring stack T form (similar to the flange-like expansion Ha or Hb of Sleeve H in Fig. 1 1 A), wherein the lower plate spring Ta rests on an upper surface of the intermediate member 41 surrounding the second through hole L2 and the upper plate spring Tb abuts a lower surface of the die plate 42 surrounding the first through hole L1. The first screw S1 and the second screw S2 are screwed together in the assembled state, wherein the plate spring stack T is compressed in the Z direction. The two units thus formed each contain the two strained screws S1, S2, the four strained

Ring disks R1, R2, R3, R4, the lock nut M and the strained disk spring stack T and are between the intermediate member 41 and the

Matrizenplatte 42 clamped. They form the third flexible connecting member 14 and the fourth flexible connecting member 15 of the second arrangement (multi-point flexi-storage / suspension).

Of course, the third connecting member 13 of the first arrangement (one-point flexi-storage / suspension) may have the structure described in Fig. 1 1 B. Conveniently, however, it would be somewhat larger than the first connecting member 1 1 and the second link 12 of this first arrangement.

The contact area 81 between the first annular disk R1 and the second annular disk R2 and the contact area 82 between the third annular disk R3 and the fourth annular disk R4 are each formed by a pair of contacting spherical surfaces through the concave spherical surface on the first annular disk R1 and the convex spherical surface on the second annular disc R2, both having the same radius of curvature with respect to the common center Z of an imaginary spherical surface, which is indicated in Fig. 1 1 B as a dashed circle. In addition, between the inner surface of the hole of the second annular disc R2 and the Außenf surface of the first screw S1 and between the

Inner surface of the first through hole L1 of the die plate 42 and the outer surface of the first screw S1, the first gap 71 is present. Similarly, between the inner surface of the hole of the fourth annular disc R4 and the outer surface of the second screw S2 and between the inner surface of the second through-hole L2 at

Intermediate member 41 and the outer surface of the second screw S2, the second gap 72 is present. Between the first annular disc R1 and the first screw S1 and between the third annular disc R3 and the second Screw S2 is not a radial clearance or a much smaller radial clearance than in the gap areas 71 and 72 available.

When mounting the thus formed connecting members 14, 15 of the plate spring stack T is compressed, whereby the respective

abutting spherical surfaces of the first annular disc R1 and the second annular disc R2 and the third annular disc R3 and the fourth annular disc R4 are pressed against each other. The flexibility of the connecting links 14, 15 (see FIGS. 5 and 7) thus formed is based on the play in the gap areas 71, 72 on the elastic deformability of the bridge

Cup spring stack T and on the possibility of sliding together the first and second annular disc R1, R2 in the first contact area 81 and on the possibility of sliding together the third and fourth annular disc R3, R4 in the second contact area 82nd

The flexibility of the pin-like links 1 1, 12 or 13, 14, 15 shown in Fig. 10B and in Fig. 11B may be e.g. be adjusted by the total length of the two screws S1 and S2 and / or the wall thickness of the sleeve portion S2a and by the choice of the material of the screws S1 and S2. An enlargement / reduction of the

Total length of the screws S1 and S2 leads to a

Enlargement / reduction of the flexibility of the link. An enlargement / reduction of the wall thickness of the sleeve portion S2a thereby leads to a reduction / enlargement of the flexibility of the

Link. An enlargement / reduction of the modulus of elasticity of the material of the screws S1 and S2 leads to a

Enlargement / reduction of the flexibility of the link.

The pin-like shown in Fig. 10B and in Fig. 1 1 B.

Double-screw diaphragm spring type connecting members n, 12 and 13, 14, 15 have single-screw-sleeve-type pin-like link members 1 1, 12 and 13, 14, 15, respectively, as shown in Fig. 10A and Fig. 1A the advantage that they also allow irreversible deformability in addition to the flexibility based on the mechanisms mentioned in terms of a reversible elastic deformability. Namely, when under load in the form of a tilting moment the intermediate member 41 is tilted from the position shown in Fig. 10B relative to the drive means 9 or 10, takes place up to a maximum value of the tilting moment an elastic deformation of the screws S1 and S2 and by the When sufficiently strong, ie supercritical load (sufficiently large tilting moment) is in the connecting members 1 1, 12, the stiction in the first contact region 81 between the first annular disc R1 and the second annular disc R2 and / or the Stiction in the second

Contact region 82 between the third annular disc R3 and the fourth annular disc R4 overcome, so that the two annular discs R1 and R2 and / or the two annular discs R3 and R4 begin to slide relative to each other. The extent of this sliding movement is limited by the radial play of the gap 71 or the gap 72. This overcoming of stiction and occurrence of slip under sliding friction in the contact areas 81 and / or 82 produces the irreversible deformation of the links 1 1, 12.

Instead of the pin-like first embodiment (see Fig. 3) of the flexible connecting members 1 1, 12, 14, 15 shown with reference to Figures 10A, Fig. 1A, Fig. 10B, Fig. 1 1B, these may also be sheet-like as shown in FIG. 12, in which these sheet-like flexible connecting links 1 1 ', 12', 14 ', 15' are cut along a horizontal sectional plane EE (see FIGS. 10C, 10D, 1) 1 C, Fig. 1 1 D) are shown. The representations in FIGS. 10A, 11A, 10B, 11B would then be vertical sections orthogonal to the plane of the respective sheet-like connecting link, whose plane would then extend in a plane parallel to the lifting axis Z-Z.

The sleeve H in Fig. 10A and Fig. 1A would then be replaced by two U-profiles, one of which is open to the left and the other to the right. That the legs of the one U-profile extend to the left, and the legs of the other U-profile extend to the right, while the base of the two U-profiles by (not shown)

Fasteners on the screws or pins S and S1 would be attached. The spherical surfaces of the two contact regions 81, 82 in FIGS. 10B and 11B would then be replaced by cylindrical surfaces whose generatrix would extend orthogonal to the stroke axis ZZ, and the annular gaps 71, 72 of FIGS. 10B and 1 1 B would be replaced by a flat column.

In Fig. 10C is a vertical section of a connector in more detail 1 1 'or 12' according to a first variant (screwed H-profile) of the second embodiment (sheet) shown in a

Region between the drive means 9 and the drive means 10 and the intermediate member 41 is arranged. In this case, an H-profile P whose longitudinal axis extends orthogonal to the lifting axis ZZ, between the drive member 9 and 10 and the intermediate member 41 is arranged such that two of the four legs of the H-profile to the left and two of these four legs of the H. Profiles to the right. The lower end Pa of the H-profile P rests on an upper surface of the drive means 9 and 10, respectively, while the upper end Pb of the H-profile P abuts a lower surface of the intermediate member 41. The two resting on the drive means 9 and 10 and the lower end Pa of the H-profile forming two legs are each with a

Attached fastening screw 61 which extends through a hole in the respective leg and is screwed into a threaded bore in the drive means 9 and 10 respectively. The two adjoining the intermediate member 41 and the upper end Pb of the H-profile forming two legs are also each secured with a fastening screw 61 which extends through a hole in the respective leg and is screwed into a threaded hole in the intermediate member 41. The plane E-E is the sectional plane along which the links 1 1 'and 12' are shown cut in Fig. 12.

In Fig. 11 C is a vertical section of a detailed illustrated connecting member 14 'or 15' according to the first variant (screwed H-profile) of the second embodiment (sheet) shown, which is arranged in a region between the intermediate member 41 and the die plate 42. In this case, the H-profile P, whose longitudinal axis extends again orthogonal to the lifting axis Z-Z, between the intermediate member 41 and the

Die plate 42 arranged such that two of the four legs of the H-profile to the left and two of these four legs of the H-profile to the right extend. The lower end Pa of the H-profile P rests on an upper surface of the intermediate member 41, while the upper end Pb of the H-profile P abuts a lower surface of the die plate 42. The two on the

Lying intermediate member 41 and the lower end Pa of the H-profile forming two legs are each secured with a fastening screw 61 which extends through a hole in the respective leg and is screwed into a threaded bore in the intermediate member 41. The two adjoining the die plate 42 and the upper end Pb of the H-profile forming two legs are also each secured with a fastening screw 61 which extends through a hole in the respective leg and is screwed into a threaded bore in the die plate 42. The plane E-E is the sectional plane along which the links 14 'and 15' are shown in cross-section in FIG.

Of course, the third link 13 of the first arrangement (one-point flexi-bearing / suspension) can have the structure described in Fig. 1 1 C. Conveniently, however, it would be dimensioned somewhat larger than the first connecting link 1 1 'and the second

Connecting member 12 'of this first arrangement.

In Fig. 10D is a vertical section of a connector shown in more detail 1 1 'or 12' according to a second variant (screwed leaf spring) of the second embodiment (sheet) shown in an area between the drive means 9 and the drive means 10 and the intermediate member 41st is arranged. Here is a leaf spring B, whose

Longitudinal axis extends orthogonal to the stroke axis Z-Z, between the

Drive member 9 and 10 and the intermediate member 41 is arranged such that the leaf plane extends parallel to the lifting axis ZZ. The lower end Ba of the leaf spring B rests on an upper surface of the drive means 9 and 10, respectively, while the upper end Bb of the leaf spring B abuts a lower surface of the intermediate member 41. The lower end or the lower edge Ba of the leaf spring B is fixed by means of two clamping strips K1, K2 to the drive means 9 and 10 respectively. For this purpose, these two terminal strips K1, K2 are respectively screwed by means of fastening screws 62 to the drive means 9 and 10 respectively. In addition, a further fastening screw 63 extends in Transverse direction through a respective through hole in the terminal block K1, in the lower end Ba of the leaf spring B and in the terminal block K2, said mounting screw 63 is screwed at its top with a mounting nut 64 and tightened. The upper end or the upper edge Bb of the leaf spring B is fixed to the intermediate member 41 by means of two clamping strips K3, K4. For this purpose, these two terminal strips K3, K4 each means

Fixing screws 62 screwed to the intermediate member 41.

In addition, here also a further fastening screw 63 extends in the transverse direction through a respective through hole in the terminal block K3, in the upper end Bb of the leaf spring B and in the terminal block K4, and this fastening screw 63 is screwed at its tip with a fastening nut 64 and tightened , The plane E-E is the sectional plane along which the links 1 1 'and 12' are shown cut in Fig. 12.

In Fig. 11 D is a vertical section of a connector 14 'or 15' shown in more detail according to the second variant (screwed leaf spring) of the second embodiment (sheet) shown, which is arranged in a region between the intermediate member 41 and the die plate 42. In this case, the leaf spring B, whose longitudinal axis extends orthogonal to the lifting axis Z-Z, between the intermediate member 41 and the die plate 42 is arranged such that the leaf plane extends parallel to the stroke axis Z-Z. The lower end Ba of the leaf spring B is located on an upper surface of the

Intermediate member 41, while the upper end Bb of the leaf spring B abuts a lower surface of the die plate 42. The lower end or the

Lower edge Ba of the leaf spring B is fixed to the intermediate member 41 by means of two clamping strips K1, K2. For this purpose, these two terminal strips K1, K2 are respectively screwed by means of fastening screws 62 to the intermediate member 41. In addition, a further fastening screw 63 extends in

Transverse direction through a respective through hole in the terminal block K1, in the lower end Ba of the leaf spring B and in the terminal block K2, said mounting screw 63 is screwed at its top with a mounting nut 64 and tightened. The upper end or the upper edge Bb of the leaf spring B is fixed to the die plate 42 by means of two clamping strips K3, K4. For this purpose, these two terminal strips K3, K4 each means

Fixing screws 62 screwed to the die plate 42. In addition, here also a further fastening screw 63 extends in the transverse direction through a respective through hole in the terminal block K3, in the upper end Bb of the leaf spring B and in the terminal block K4, and this fastening screw 63 is screwed at its tip with a fastening nut 64 and tightened , The plane EE is the sectional plane along which the links 14 'and 15' are shown in cross-section in FIG.

Of course, the third link 13 of the first arrangement (one-point flexi-bearing / suspension) can have the structure described in FIG. 11D. Conveniently, however, it would be dimensioned somewhat larger than the first connecting link 1 1 'and the second

Connecting member 12 'of this first arrangement.

In Fig. 12, a plan view similar to Fig. 3 is shown in more detail of the second arrangement of the second arrangement

Embodiment (see Fig. 10C, Fig. 1 1C or Fig. 10D, Fig. 1 1 D) shown, wherein the respective connecting members along a horizontal plane E-E are shown in section. While the pin-like connecting links 1 1, 12, 14, 15 of the first embodiment (Fig. 3) are flexible in all directions of the plane XY, the blade-like connecting links 1 1 ', 12', 14 ', 15' of this second embodiment (Fig 12) are practically flexible only for deflections in the X direction, while having virtually no flexibility in the Y direction.

According to the invention, however, both the first embodiment of FIG. 3 with only pin-like connecting members 1 1, 12, 14, 15 and the second embodiment of FIG. 12 with only sheet-like connecting members 1 1 ', 12', 14 ', 15' enable a torque-free (kippmomentfreie) force introduction into the

Die plate 42 in the event that the two drive means 9 and 10, a difference between them along the press stroke axis Z-Z

have extending paths.

Claims

claims

1 . Powder press (1) for producing a compact of a powdery material, comprising a frame, a punch assembly and a die assembly defining a mold cavity into which the powdered material is fillable and thereafter for forming the compact the punch assembly and the die assembly along a Press vertical axis ZZ are relatively movable and pressed against each other, wherein

a) the die assembly (4) with a two parallel along the vertical axis Z-Z acting drive means (9, 10) connected Matrizenplatten- intermediate member (41) and a guide means (5, 6, 7, 8) along the

Connecting means (12; 12 ') is connected, wherein the first connecting means (1 1; 1 1') and the second connecting means (12; 12 ') are arranged on a perpendicular to the press axis Z-Z orthogonal first straight line X-X; and c) the die plate intermediate member (41) and the die plate (42) are interconnected by means of a third flexible connection means (13; 14, 15; 13 '; 14', 15 ') which are orthogonal to the press vertical axis ZZ and the first straight line XX orthogonal second straight line YY equidistant to the first flexible connecting means (1 1; 1 1 ') and the second flexible

Connecting means (12; 12 ') is arranged such that the resulting tensile force or thrust transmitted by the third flexible connecting means (13; 14, 15; 13'; 14 ', 15') at a point on a through the center of gravity of the die plate (13). 42) extending vertical straight line in the die plate (42) is introduced, characterized in that d) on the one hand:

the first flexible connection means on the first drive means (9) and fixed to the die plate intermediate member (41) first flexible

Connecting member (1 1, 1 1 ') has; and

the second flexible connecting means comprises a second flexible connecting member (12; 12 ') secured to the second drive means (10) and to the die plate intermediate member (41); and that e) on the other hand:

e1) said third flexible connection means comprises a third flexible link (13; 13 ') secured to said die plate intermediate member (41) and said die plate (42); or

2. powder press (1), in particular according to claim 1, for producing a compact of a powdery material, with a frame, a punch assembly and a die assembly which defines a mold cavity, in which the pul deformed material can be filled and then to form the compact the punch assembly and the die assembly along a press vertical axis ZZ are movable relative to each other and pressed against each other, wherein

a ') the punch assembly (4) with a two parallel along the vertical axis Z-Z acting drive means (9, 10) connected stamp plate intermediate member (41) and a guide means (5, 6, 7, 8) along the stroke direction or Vertical axis ZZ guided and with the stamp plate intermediate member (41) connected stamp plate (42); and

b ') the stamp plate intermediate member (41) with a first drive means (9) by means of a first flexible connection means (1 1; 1 1') is connected and with a second drive means (10) by means of a second flexible

Connecting means (12; 12 ') is connected, wherein the first connecting means (1 1; 1 1') and the second connecting means (12; 12 ') are arranged on a first vertical line XX orthogonal to the press vertical axis ZZ; and c ') the stamp plate intermediate member (41) and the stamp plate (42) by means of a third flexible connection means (13; 14, 15; 13 ';14', 15 ') which are arranged equidistant to the first flexible connection means (1) on a second straight line YY orthogonal to the press vertical axis ZZ and orthogonal to the first straight line XX 1, 1 1 ') and the second flexible

Connecting means (12; 12 ') is arranged such that the resulting tensile force or thrust transmitted by the third flexible connecting means (13; 14, 15; 13'; 14 ', 15') at a point on one through the center of gravity of the stamp plate ( 42) extending vertical straight lines in the stamp plate (42) is introduced, characterized in that d ') on the one hand:

the first flexible connection means comprises a first flexible attached to the first drive means (9) and the die plate intermediate member (41)

Connecting member (1 1, 1 1 ') has; and

the second flexible connecting means comprises a second flexible connecting member (12; 12 ') secured to the second drive means (10) and to the die plate intermediate member (41); and that e ') on the other hand:

e1 ') the third flexible connecting means comprises a third flexible connecting member (13; 13') secured to the stamp plate intermediate member (41) and to the stamp plate (42); or

3. powder press (1) according to claim 1 or 2, characterized

characterized in that the third flexible connection means is on the

Die plate intermediate member (41) and on the die plate (42) and on the stamp plate intermediate member (41) and the die plate (42) fixed third flexible connecting member (13, 13 '), wherein the third flexible Fastened to the die plate intermediate member (41) or to the stamp plate intermediate member (41) at an intermediate member mounting location 0/0 / Z1 lying on the vertical axis ZZ, and wherein the third flexible connecting member (13) 13, 13 ') is fastened to the die plate (42) or to the stamp plate (42) on a plate mounting location 0/0 / Z2 lying on the vertical axis ZZ.

(- variant with central, point / one-point flexi storage)

4. powder press (1) according to one of claims 1 to 3, characterized in that the third flexible connection means on the

Die plate intermediate member (41) and on the die plate (42) or on the stamp plate intermediate member (41) and the die plate (42) fixed third flexible connecting member (14; 14 ') and fourth flexible

Connecting member (15, 15 '), wherein the third flexible connecting member (14, 14') on the die plate intermediate member (41) or on the

Stamping plate intermediate member (41) is attached to a first intermediate member mounting location 0 / Y4 / Z1 and the fourth flexible connecting member (15, 15 ') on the die plate intermediate member (41) or on the

Stamping plate intermediate member (41) is attached to a second intermediate link mounting location 0 / Y5 / Z1, and wherein the third flexible

Connecting member (14, 14 ') on the die plate (42) or on the

Stamping plate (42) is fixed to a first plate mounting location 0 / Y4 / Z2, and the fourth flexible link (15; 15 ') is fixed to a second plate mounting location 0 / Y5 / Z2, wherein the link mounting locations are 0 / Y4 / Z1 and 0 / Y5 / Z1 lie on a second straight line which is orthogonal to the vertical axis ZZ and orthogonal to the first straight line XX, and wherein the plate mounting locations 0 / Y4 / Z2 and 0 / Y5 / Z2 are orthogonal to the vertical axis ZZ and to the first Lines XX are orthogonal third straight lines.

(- Variant with decentralized, rectilinear distributed / multipoint flexi-storage)

5. Powder press according to one of claims 1 to 4, characterized in that one or both of the flexible connecting members (1 1, 12; 1 1 ', 12') in each case by a parallel to the vertical axis ZZ elastically stretched pin-like member (S, H; S1, S2, T) or sheet-like member (P; B) formed by a respective through hole (L; L1) of the

Intermediate member (41), wherein a first end (Sa; S1 a; Pa; Ba) of the respective pin-like member (S, H; S1, S2, T) or sheet-like member (P; B) is connected to a respective drive means (9 10) and a second end (Sb; S1b; Pb; Bb) of the respective pin-like or sheet-like member (S, H; S1, S2, T; P; B) is connected to the intermediate member (41).

6. Powder press according to claim 5, characterized in that one or both of the flexible connecting members (1 1, 12) each one

Screw / spacer unit (S, H; S1, S2, T) are their respective spacers (H; T) between the mutually facing sides of the respective drive means (9, 10) and the intermediate member (41) by means of the respective screw ( S, S1, S2) is clamped and surrounds the screw (S; S1, S2) like a ring or sleeve, wherein preferably the respective screw (S; S1, S2) passes through the respective through hole (L;

Intermediate member (41) extends therethrough, wherein preferably a first end (Sa) of the respective screw (S) in a threaded bore (G) of the respective drive means (9 or 10) is screwed and designed as a screw head second end (Sb) of the respective Screw (S) on the

Intermediate member (41) in the region of the through hole (L) is applied.

7. Powder press according to claim 5, characterized in that one or both of the flexible connecting members (1 1 ', 12') each by a spring leaf unit (P; B, K1, K2, K3, K4) are formed, their respective

Spring leaf (P; B), which is a sheet-like spacer, extending in a plane orthogonal to the first straight line XX, wherein a first end (Pa; Ba) of the respective spring leaf (P; B) with the respective drive means (9 or 10 ) and a second end (Pb; Bb) of the respective spring leaf (P; B) is fixedly connected to the intermediate member (41).

8. Powder press according to claim 6, characterized in that one or both of the flexible connecting members (1 1, 12) on at least one of its ends (S1 b and / or S2b) are mounted spherically (81 and / or 82).

9. powder press according to claim 7, characterized in that one or both of the flexible connecting members (1 1 ', 12') are mounted cylindrical at its lower end (Pa; Ba) and / or at its upper end (Pb; Bb), wherein the cylinder axis or axis of rotation of the bearing extends parallel to the straight line YY.

10. Powder press according to one of claims 1 to 9, characterized in that the one or the other further flexible

Connecting links (13, 14, 15, 13 ', 14', 15 ') are each formed by a pin-like member (S, H; S1, S2, T) or sheet-like member (P; B) elastically stretched parallel to the vertical axis ZZ, that by a respective

Through hole (L; L1) of the die plate (42) and the punch plate (42), respectively, a first end (Sa; S1a; Pa; Ba) of the respective pin-like member (S, H; S1, S2, T) or leaf-like member (P; B) is connected to the intermediate member (41) and a second end (Sb; S1b; Pb; Bb) of the respective pin-like or sheet-like member (S, H; S1, S2, T; P; B ) is connected to the die plate (42) or to the die plate (42).

1 1. Powder press according to claim 10, characterized in that the one or two further flexible connecting members (13; 14, 15) are each a screw / spacer unit (S, H; S1, S2, T) whose respective spacers (H; T) between the mutually facing sides of the die plate (42) and the stamp plate (42) and the intermediate member (41) by means of the respective screw (S; S1, S2) is clamped and the

Screw (S; S1, S2) surrounds annularly or sleeve-like, wherein preferably the respective screw (S; S1, S2) extends through the respective through hole (L; L1) of the die plate (42) and the die plate (42), wherein preferably a first end (Sa) of the respective screw (S) in a

Threaded hole (G) of the intermediate member (41) is screwed and designed as a screw head second end (Sb) of the respective screw (S) on the die plate (42) and the punch plate (42) in the region

Through hole (L) is applied.

12. Powder press according to claim 10 or 1 1, characterized

characterized in that the one or the other further flexible Connecting members (13 ', 14', 15 ') each by a spring leaf unit (P; B, K1, K2, K3, K4) are formed, whose respective spring leaf (P; B) in a direction orthogonal to the first line XX level wherein a first end (Pa; Ba) of the respective spring leaf (P; B) is fixedly connected to the intermediate member (41) and a second end (Pb; Bb) of the respective spring leaf (P; B) is connected to the die plate (42 ) or with the stamp plate (42) is firmly connected.

13. Powder press according to claim 1 1, characterized in that the one or the other further flexible connecting members (13; 14, 15) at at least one of its ends (S1 b and / or S2b) are mounted spherically (81 and / or 82) ,

14. Powder press according to claim 12, characterized in that the one or the other further flexible connecting members (13 ', 14', 15 ') at its lower end (Pa; Ba) and / or at its upper end (Pb; Bb) are cylindrical, wherein the cylinder axis or axis of rotation of the bearing extends parallel to the straight line YY.

15. Powder press according to one of the preceding claims, characterized in that the rigidity or the flexibility of the flexible connecting means (1 1, 12, 13, 14, 15, 1 1 ', 12', 13 ', 14', 15 ') is adjustable.