EP3595831A1 - Verfahren zur herstellung eines grünlings mit einem presswerkzeug, ein presswerkzeug, ein grünling sowie ein sinterteil - Google Patents
Verfahren zur herstellung eines grünlings mit einem presswerkzeug, ein presswerkzeug, ein grünling sowie ein sinterteilInfo
- Publication number
- EP3595831A1 EP3595831A1 EP18711320.4A EP18711320A EP3595831A1 EP 3595831 A1 EP3595831 A1 EP 3595831A1 EP 18711320 A EP18711320 A EP 18711320A EP 3595831 A1 EP3595831 A1 EP 3595831A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- punch
- axial direction
- receptacle
- along
- green compact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003825 pressing Methods 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 34
- 230000002093 peripheral effect Effects 0.000 claims description 36
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims 2
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 239000002245 particle Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 241001522319 Chloris chloris Species 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000012254 powdered material Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
- B28B3/08—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form with two or more rams per mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
- B28B3/08—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form with two or more rams per mould
- B28B3/086—The rams working in different directions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/007—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a plurality of pressing members working in different directions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
- B30B15/022—Moulds for compacting material in powder, granular of pasta form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
- B22F2003/031—Press-moulding apparatus therefor with punches moving in different directions in different planes
Definitions
- the invention relates to a method for producing a green compact with a pressing tool, a pressing tool, a green compact and a sintered part (or a component produced by a heat treatment of the green compact). hereinafter also referred to as a sintered part).
- a sintered part a part which is to be further processed (eg by heat treatment) are produced with the pressing tool, ie green compacts which, after the pressing process, are produced, for example.
- B. can be sintered.
- metallic and / or ceramic powders can be pressed into green bodies in the matrix.
- the method can be used for operating the pressing tool and for producing the green body or the sintered part.
- the pressing tool can be used for producing the green compact.
- a die extends along an axial direction between a first end face and a second end face, and forms between the end faces an inner circumferential surface which forms a receptacle for a powdered material or for a green compact produced from the material by compression.
- At least one punch of the pressing tool which can be moved along the axial direction via a (first) end face into the die is provided, which presses the material arranged in the receptacle into the green compact.
- an opening can be provided in the inner peripheral surface, over which at least one, long of a radial direction through a channel in the die and towards receiving movable and thereby filling the opening, second punch can be moved into the receptacle into it.
- the inner peripheral surface of the die forms on the one hand the receptacle for the powder or the green product to be produced.
- at least one upper punch of the pressing tool can travel into the die along the axial direction, via the first end face of the die which is open at the top.
- the at least one upper punch slides along the inner circumferential surface of the die and increasingly presses the powder.
- at least one lower punch can additionally be provided, which moves into the die via a downwardly open second end face of the die along the axial direction, or moves in the die between an upper position and a lower position, the die also being opposite the possibly . can not be moved unmixed.
- the inner peripheral surface of the die defines in particular a lateral contour of the green body.
- the green compacts produced in dies can have a variety of geometries.
- in sections of the green compact which have side surfaces which are inclined with respect to the axial direction, that is to say conically taper, inhomogeneities can occur in the density distribution of the green compact.
- these parts either can not be produced or even as sintered parts, especially in these sections, does not have the desired strength or the desired properties. So far, no compression method is known with such geometries can be produced with reasonable effort or with optimal component properties.
- a method for producing at least one green compact with a pressing tool contributes.
- the pressing tool comprises at least a die, a first punch and a second punch.
- the die extends along an axial direction between a first end face and a second end face and forms an inner peripheral face with an opening between the face faces.
- the inner peripheral surface forms a receptacle for the green body.
- the at least one first punch is movable over one of the end faces of the die into the receptacle along an axial direction.
- the at least one second punch is through a channel in the die and toward receiving along a radial Direction movable, whereby he prefers (if he was moved to the recording process), the opening fills.
- the method comprises at least the following steps:
- step b) providing the die and the second punch, the second punch being offset outwardly from the inner peripheral surface (and the opening) in the radial direction before or during step b);
- the movable in the radial direction second punch is not used in particular for generating an undercut.
- the second punch is moved beyond the opening into the receptacle, whereby the second punch has to be moved out of the receptacle before removal of the green compact from the receptacle, so that the positive connection between the second punch produced in the axial direction and Grünling is canceled.
- Such a "return movement" of the second punch is not required for the removal of the green compact from the recording, but the green compact can be removed in particular even if the second Stamp is in the above-mentioned "flush” or "slightly protruding" end position.
- the second punch for removal of the green compact is only at most 0.1 mm relative to the end position (ie the position in which the second punch is moved along the radial direction most towards the receptacle during step c) along the radial Headed back.
- the powdery material can not be moved with sufficient accuracy and / or only with high risk of inhomogeneities in this section of the later green body.
- the use of a movable in the radial direction second punch now allows that the required amount of material targeted and accurately measured to this section can be moved.
- the second punch has an end face which forms the receptacle together with the inner peripheral surface, the end face extending parallel to the axial direction.
- the inner peripheral surface in particular in the region between the opening and the first end face of the die, extends parallel to the axial direction.
- a "parallel" orientation should still be present here, as far as this is usually adjustable with the manufacturing tolerances of the components specified here, so that, for example, deviations of at most two (2) angular degrees, preferably of at most one (1) angular degree, particularly preferably of at most 0, 3 angle degree from the axial direction should be included.
- the (at least one) second punch in step a) or during step b) is offset so far in the radial direction relative to the inner peripheral surface that the filled in step b) material (before step c)) also in the channel ,
- the filling of the material and the method of the second punch is performed at least partially parallel to each other.
- the second die is arranged substantially flush with the inner circumferential surface before the material is introduced, with the second punch being retracted along the radial direction during the filling of the material.
- the movement of the second punch acts like a vacuum pump and pulls the material into the channel.
- the material arranged in the channel is displaced over the opening into the receptacle by the method of the (at least one) second punch in step c).
- the (at least one) second punch comprises at least a first part-punch and a second part-punch, which can be moved independently of one another. It is also possible that two second punches are provided. This allows the process to be adapted more precisely to the respective prevailing conditions. For example, partial volumes of the later green compact can be successively filled and compacted.
- stamps (and ejectors) provided in the method can be coupled together or moved and controlled completely independently of each other.
- the partial punches are arranged alongside one another along the axial direction. But it is also a different arrangement of the partial stamp possible. These can also be arranged coaxially with one another or along a circumferential direction next to one another.
- a partial region of a wall region of the green compact extending along the axial direction from a first end to a second end is compacted by the (at least one) second stamp, wherein the partial region extends from the first end and / or spaced from the second end.
- the wall area between the first end and the partial area is in particular pressed by the first stamp.
- the powdery material is displaced along the inner peripheral surface primarily along the axial direction.
- the wall portion extends from a first end to a second end of the wall portion or green body, wherein the ends need not denote the maximum extent of the green body along the axial direction.
- a partial area of the wall area is compacted by the second punch.
- the subarea here is the rich of the green compact, which is arranged in the radial direction in front of the end face of the second punch.
- the subregion extends between a first parting line and a second parting line on or to the wall region along the axial direction, wherein at least one of the parting lines has a curved, in particular meandering, course.
- these separating lines can be generated relative to the wall regions which are not compressed in the radial direction and can therefore be readily identifiable.
- another surface image and / or a second, second surface texture occurs in the subregion, which can be visually distinguished from the first surface texture of the wall region, outside the subregion.
- the (at least one) second die is disposed on a portion of the green body that tapers along the axial direction, wherein a ratio between a largest cross section, transverse to the axial direction, the portion, and a minimum cross section is at least 2: 1, preferably at least 3: 1 is.
- the largest cross section of the tapered section is arranged in particular between the first parting line and the second parting line.
- the taper takes place continuously over, with respect to the axial direction inclined arranged side surfaces of the inner peripheral surface or the receptacle.
- the pressing tool can be used in particular for the proposed be used for the production of a green compact.
- the pressing tool comprises at least one die, at least one first punch and at least one second punch.
- the die extends along an axial direction between a first end face and a second end face and forms an inner peripheral face with an opening between the face faces.
- the inner peripheral surface forms a receptacle for the green body.
- the at least one first punch is movable along an axial direction.
- the at least one second punch is movable along a radial direction through a channel in the die and towards the receptacle, wherein it preferably (when it was moved to the recording) fills the opening.
- the first punch is movable over one of the end faces of the die in the receptacle along the axial direction.
- the pressing tool is now set up so that the second punch in the radial direction is movable only so far towards the receptacle that it at least with a portion of the inner peripheral surface, along the axial direction between the one end face on the first punch in the recording is moved, and the opening is arranged, flush or at the most by 0.1 mm [millimeters], in particular at most by 0.05 mm, at least opposite to this region of the inner peripheral surface in the radial direction in the recording into it can be arranged projecting.
- the second punch on its end face facing the receptacle has no contour for forming an undercut on the green compact.
- undercut preferably denotes a shoulder in the outer surface of the green body, which is an undersize (along the radial direction) of more than 2 or 1 mm, or even more than just 0.1 mm [millimeter], in particular more than 0.05 mm , opposite to each (other) surface of the green compact between the surface of the green compact formed by the end face of the second punch and the first end and / or the second end of the wall region or the green compact along the axial direction.
- the first end and the second end are each arranged directly adjacent to the wall region.
- the (at least one) second punch has an end face forming the receptacle together with the inner peripheral face, the end face extending parallel to the axial direction.
- the inner peripheral surface in particular in the area between the opening and the first end face of the die, also extends parallel to the axial direction.
- a green compact made by compressing a powdery material having a longitudinal axis extending along an axial direction and a wall portion parallel to the longitudinal axis extending along the axial direction from a first end to a second end extends.
- the wall portion includes a portion that is spaced from the first end and from the second end.
- a first surface structure of the wall area outside the partial area set by the pressing is different from a second surface structure of the partial area.
- the first surface texture outside the portion is generated by shearing, namely, moving the particles along the inner circumferential surface in the axial direction during compression, forming a glossy surface with flattened particles.
- the portion extends between a first parting line to the wall portion and a second parting line to the wall portion along the axial direction, wherein the parting line forms the transition from the first surface texture to the second surface texture.
- the portion of the wall portion is formed by the pressing along the radial direction with the second punch.
- a second surface structure arises in the partial area, which can already be visually distinguished from the first surface structure (outside the partial area).
- the second surface texture of the subregion is not formed by shearing.
- the particles are compressed along the radial direction.
- the result is a matte surface with flattened particles.
- At least one (in particular both) of the separating lines on a curved, in particular meandering course can be of a meandering or
- the curved or meandering course counteracts the formation of a predetermined breaking point, which is rather to be expected in the case of straight-line parting lines the partial region compressed by the second punch and the wall region formed by the axial compression. Minimal edges and / or structure differences can form the predetermined breaking point. This transition of a possible density difference in the green compact between the partial area and the wall area is "blurred" by the curved dividing line.
- the subsection is made without undercuts to the wall region and terminates flush with the wall region or is offset by at most 0.1 mm [millimeters], in particular at most 0.05 mm, from the wall region in a radial direction into the green compact.
- undercut preferably denotes any shape of the green compact which has an undersize (along the radial direction) of more than 0.1 mm, in particular of at most 0.05 mm, relative to each surface of the green body between the subregion formed by the end face of the second stamp the green body and the first end and / or the second end of the wall portion or the green body along the axial direction.
- the subregion is arranged on a section of the green body which tapers along the axial direction, wherein a ratio between a largest cross section, transverse to the axial direction, of the subsection and a smallest cross section is at least 2: 1, in particular at least 3: 1 , is.
- the largest cross section of the tapered section is arranged in particular between the first parting line and the second parting line.
- the smallest cross section between the first parting line and the second parting line is arranged.
- the taper takes place continuously over, with respect to the axial direction inclined arranged side surfaces of the portion of the green compact, wherein At least the side surface of the green compact, which has the partial area, extends at least in the partial area parallel to the longitudinal axis.
- the green compact can be produced in particular by the method and / or by using the pressing tool.
- the remarks on the method and the pressing tool apply equally to the green product and vice versa.
- sintered part a sintered part or a heat-treated component (hereinafter sintered part) is proposed, produced by sintering or heat treatment of the above-described green compact, wherein the sintered part in the region of the green compact, in which the first Oberfiumbleenge Stahl prevailed, a third surface structure is formed and in the Grünlings, in which previously had the second Oberfiumbleen Modell, a fourth (different from the third surface structure) surface structure has.
- the third surface structure and the fourth surface structure relate to the changes in the surface structure due to the sintering or the heat treatment, starting from the surface structures in the green structure.
- the differences between the surface area and the wall area can also be identified on the sintered part.
- FIG. 2 shows the green compact according to FIG. 1 in a second perspective view
- FIG. 3 shows the green compact according to FIGS. 1 and 2 in a side view
- 4 shows a sintered part in a side view
- FIG. 5 shows the sintered part according to FIG. 4 in a perspective view
- FIG. 6 shows a first pressing tool during step b) of the method in a perspective view in section
- FIG. 7 shows the first pressing tool according to FIG. 6 during step c) in a partially cutaway perspective view
- FIG. 8 shows a second pressing tool before step b) of the method in a perspective view in section
- FIG. 9 shows a further sintered part in a perspective view.
- FIG. 1 shows a green compact 1 in a first perspective view.
- FIG. 2 shows the green compact 1 according to FIG. 1 in a second perspective view.
- FIG. 3 shows the green compact 1 according to FIGS. 1 and 2 in a side view. FIGS. 1 to 3 will be described together below.
- the green compacts 1 produced in dies 3 can have a multiplicity of geometries. It has hitherto been difficult to produce green bodies 1, which taper at least in sections 24 of the green body 1 along the axial direction 4. In particular in sections 24 of the green body 1, which have side faces inclined relative to the axial direction 4, ie taper conically, inhomogeneities in the density distribution of the green compact 1 can occur. Thus, these parts can either not be produced or even as sintered parts 30, especially in these sections 24, do not have the desired strength or the desired properties.
- the green compact 1 shown here was produced by pressing a powdered material 14.
- the green compact 1 has a longitudinal axis 27 extending along an axial direction 4 and a wall region 21 extending parallel to the longitudinal axis 27 and extending along the axial direction 4 from a first end 19 to a second end 20, the wall region 21 forming a Partial region 18 which is spaced from the first end 19 and from the second end 20.
- a first surface structure 28 of the wall region 21, which is set by the pressing, is outside the partial area.
- the partial area 18 of the wall area 21 is formed by the pressing along the radial direction 11 with a second punch 13.
- the partial region 18 is made without an undercut to the wall region 21 and terminates flush with the wall region 21.
- the undercut designates each shape of the green body 1, which has a certain minimum undersize (along the radial direction 11) with respect to each surface of the green body 1 between the portion 18 of the green body 1 and the first end 19 formed by the end face 15 of the second punch 13 and / or the second end 20 of the wall region 21 or of the green body 1 along the axial direction 4.
- the portion 18 is disposed on a portion 24 of the green body 1 that tapers along the axial direction 4, wherein a ratio between a largest cross section 25, transverse to the axial direction 4, the portion 24, and a minimum cross section 26 is at least 2: 1.
- the tapering of the section 24 takes place continuously over side surfaces of the section 24 which are inclined relative to the axial direction 4, only the side surface of the green body 1, which has the partial area 18, extending parallel to the longitudinal axis 27.
- the sintered part 30 is made by sintering a green compact 1.
- the sintered part 30 has a longitudinal axis 27 extending along an axial direction 4 and a wall region 21 running parallel to the longitudinal axis 27, which extends along the axial direction 4 from a first end 19 to a second end 20, wherein the wall region 21 has a Partial region 18 which is spaced from the first end 19 and from the second end 20.
- the partial region 18 is arranged on a section 24 of the sintered part 30, which tapers along the axial direction 4, wherein a ratio between a largest cross section 25, transverse to the axial direction 4, the sintered part 30 and a smallest cross section 26 is at least 2: 1 ,
- the taper takes place continuously over, with respect to the axial direction 4 inclined arranged side surfaces of the sintered part.
- the side surface of the sintered part 30, which has the partial region 18, extends parallel to the longitudinal axis 27.
- the pressing tool 2 comprises a die 3, a first punch 10 and a second punch 13.
- the die 3 extends along an axial direction 4 between a first end face 5 and a second end face 6 and forms an inner peripheral surface between the end faces 5, 6 7 with an opening 8.
- the inner circumferential surface 7 forms a receptacle 9 for the green compact 1.
- the first stamp 10 can be moved along an axial direction 4.
- the second punch 13 is movable along a radial direction 11 through a channel 12 in the die 3 and towards the receptacle 9, whereby it (when it was moved to the receptacle 9) fills the opening 8 (see position of the second punch 13 in FIG Fig. 7).
- the first punch 10 can be moved over the first end face 5 of the die 3 into the receptacle 9 along the axial direction 4.
- step a) of the method the die 3 and the second punch 13 are provided, wherein the second punch 13 with respect to the inner peripheral surface 7 (and opposite the opening 8) in the radial direction 11 to the outside offset and thereby arranged in the channel 12.
- step b) of the method the filling of a powdery material 14 into the receptacle 9 takes place.
- the second punch 13 which is movable in the radial direction 11 is evidently not used for producing an undercut.
- the second punch 13 would be moved beyond the opening 8 into the receptacle 9, wherein prior to removal of the green body 1 from the receptacle 9, the second punch 13 would have to be moved out of the receptacle 9, so that the in the axial direction 4 generated positive connection between the second punch 13 and green 1 is canceled.
- the powdery material 14 can not or only very difficult to move in this section 24 of the later green body 1.
- the use of a movable in the radial direction 11 second punch 13 now allows that the required amount of material 14 can be targeted precisely to this section 24 moved towards.
- the second punch 13 has a, together with the inner peripheral surface 7, the receptacle 9 forming end face 15, wherein the end face 15 extends parallel to the axial direction 4.
- the inner peripheral surface 7 also extends in the region between the opening 8 and the first end face 5 of the die 3, parallel to the axial direction 4.
- the second punch 13 is arranged offset in step a) so far in the radial direction 11 relative to the inner peripheral surface 7, that the filled in step b) material 14 also in the channel 12 arranges as shown here.
- the arranged in the channel 12 material 14 is moved by the process of the second punch 13 in step c) via the opening 8 in the receptacle 9.
- FIG. 6 also shows a third punch 33, an ejector 34 and another (fourth) punch 35.
- the third punch 33 and, if appropriate, the further punch 35 likewise serve to densify the powdery material 14. Due to the tapered section 24, the ejector 34 can not (or only to a limited extent be used for compacting the material 14. This would result in shear stresses arise in the green body 1, which can lead to failure of the green compact 1.
- the ejector 34 is used here exclusively for removing the green compact 1 from the die 3 (together with the third punch 33 and the further punch 35).
- FIG. 7 shows the first pressing tool 2 according to FIG. 6 during step c) in a partially sectioned perspective view. Reference is made to the comments on FIG. 6.
- step c) of the method the first punch 10 and the second punch 13 are displaced for pressing the material 14 in the receptacle 9, wherein the second punch 13 in the radial direction 11 towards the receptacle 9 only so far is moved, which it is arranged flush with a region 36 of the inner peripheral surface 7, which is arranged along the axial direction 4 between the first end face 5 and the opening 8, or at most by 0.1 mm relative to this region 36 of the inner peripheral surface 7 in the radial direction 11 is arranged projecting into the receptacle 9 in.
- step c) of the method a partial area 18 of a wall region 21 of the green compact 1 extending along the axial direction 4 from a first end 19 to a second end 20 is compressed by the second punch 13, wherein the partial area 18 of the first end 19 and spaced from the second end 20 is arranged.
- Fig. 8 shows a second pressing tool 2 before step b) of the method in a perspective view in section. Reference is made to the comments on Figs. 6 and 7.
- the second punch 13 comprises a first partial punch 16 and a second partial punch 17, which can be moved independently of one another.
- the process can be adapted more closely to the prevailing conditions.
- partial volumes of the later green compact 1 can be successively filled and compacted.
- the partial punches 16, 17 are arranged alongside one another along the axial direction 4.
- 9 shows a further sintered part 30 in a perspective view. Reference is made to the comments on FIGS. 1 to 3.
- the sintered part 30 was produced by sintering the green compact 1 according to FIGS. 1 to 3.
- the partial area 18 of the green body 1 or the sintered part extends between a first parting line 22 to the wall area 21 and a second parting line 23 to the wall area 21 along the axial direction 4, wherein the first parting line 22 has a meandering course.
- the dividing lines 22, 23 are recognizable, on the one hand, due to the minimal offset in the radial direction 11 of the partial region 18, compared to the wall regions 21 which are not compressed in the radial direction 11.
- another surface image or another fourth surface texture 32 sets in the partial area 18, which can be visually distinguished from the third surface texture 31 of the wall area 21.
- the largest cross-section 25 of the tapered section 24 is arranged between the first parting line 22 and the second parting line 23. Also, the smallest cross section 26 of the tapered portion 24 is disposed between the first parting line 22 and the second parting line 23.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Powder Metallurgy (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017105364.6A DE102017105364A1 (de) | 2017-03-14 | 2017-03-14 | Verfahren zur Herstellung eines Grünlings mit einem Presswerkzeug, ein Presswerkzeug, ein Grünling sowie ein Sinterteil |
PCT/EP2018/056349 WO2018167127A1 (de) | 2017-03-14 | 2018-03-14 | Verfahren zur herstellung eines grünlings mit einem presswerkzeug, ein presswerkzeug, ein grünling sowie ein sinterteil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3595831A1 true EP3595831A1 (de) | 2020-01-22 |
EP3595831B1 EP3595831B1 (de) | 2023-06-28 |
Family
ID=61655793
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18711320.4A Active EP3595831B1 (de) | 2017-03-14 | 2018-03-14 | Verfahren zur herstellung eines grünlings mit einem presswerkzeug, ein presswerkzeug, ein grünling sowie ein sinterteil |
Country Status (7)
Country | Link |
---|---|
US (1) | US11318533B2 (de) |
EP (1) | EP3595831B1 (de) |
JP (1) | JP6949984B2 (de) |
CN (1) | CN110785245B (de) |
DE (1) | DE102017105364A1 (de) |
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CN114871434B (zh) * | 2022-04-25 | 2024-04-12 | 泉州众志新材料科技有限公司 | 金刚石刀头的热压模具、金刚石刀头的制备方法、金刚石刀头及金刚石钻头 |
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JP2739412B2 (ja) | 1993-05-21 | 1998-04-15 | 良太 平井 | 縦横比の大きい物体の粉体成型方法 |
DE29500253U1 (de) * | 1995-01-09 | 1996-05-09 | Pafamax Brandschutztech Gmbh | Vorrichtung zur Herstellung eines Rohrs aus Schüttgut |
JP4348750B2 (ja) * | 1998-04-21 | 2009-10-21 | 日産自動車株式会社 | 粉末成形装置及びその駆動方法 |
DE20115860U1 (de) * | 2001-09-17 | 2001-12-13 | Schneider Harald | Preßvorrichtung |
DE102005038915A1 (de) | 2005-08-17 | 2007-03-22 | Dorst Technologies Gmbh & Co. Kg | Verfahren und Vorrichtung zum Pressen eines Formteils mit einem Querstempel |
AT505947B1 (de) * | 2007-11-14 | 2016-04-15 | Miba Sinter Austria Gmbh | Verdichtungswerkzeug |
EP2098317A1 (de) * | 2007-12-04 | 2009-09-09 | Osterwalder AG | Verfahren und Vorrichtung zum Herstellen eines Presslings aus Metallpulver |
DE102010048183A1 (de) | 2010-10-13 | 2012-04-19 | Komage-Gellner Maschinenfabrik Kg | Presse und Verfahren zur Herstellung eines Formlings aus pulverförmigem Material |
IL214642A (en) | 2011-08-14 | 2015-07-30 | Iscar Ltd | Cutting die system |
DE102013204370A1 (de) | 2012-03-13 | 2013-09-19 | Ceramtec Gmbh | Verfahren zum Pressen eines Grünlings für die Herstellung von Schneidplatten |
AT14230U1 (de) * | 2014-02-17 | 2015-06-15 | Ceratizit Austria Gmbh | Formwerkzeug, Verfahren zur Herstellung eines Grünlings und Verwendung des Formwerkzeugs |
CN104368811A (zh) | 2014-11-26 | 2015-02-25 | 江西稀有稀土金属钨业集团有限公司 | 一种压制粉料异形产品的模具及压制粉料异形产品的方法 |
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US11318533B2 (en) | 2022-05-03 |
CN110785245B (zh) | 2022-08-19 |
WO2018167127A1 (de) | 2018-09-20 |
JP2020512484A (ja) | 2020-04-23 |
DE102017105364A1 (de) | 2018-09-20 |
EP3595831B1 (de) | 2023-06-28 |
CN110785245A (zh) | 2020-02-11 |
ES2957558T3 (es) | 2024-01-22 |
JP6949984B2 (ja) | 2021-10-13 |
US20200009652A1 (en) | 2020-01-09 |
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