EP3849722A1 - Drawing die with associated nib holder - Google Patents
Drawing die with associated nib holderInfo
- Publication number
- EP3849722A1 EP3849722A1 EP19762819.1A EP19762819A EP3849722A1 EP 3849722 A1 EP3849722 A1 EP 3849722A1 EP 19762819 A EP19762819 A EP 19762819A EP 3849722 A1 EP3849722 A1 EP 3849722A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nib
- holder
- base plate
- clamps
- drawing die
- 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
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 238000005491 wire drawing Methods 0.000 claims description 29
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 230000007704 transition Effects 0.000 claims description 10
- 239000011230 binding agent Substances 0.000 claims description 8
- 230000004323 axial length Effects 0.000 claims description 7
- 238000001746 injection moulding Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 238000000280 densification Methods 0.000 claims description 3
- 239000002826 coolant Substances 0.000 abstract description 17
- 239000000463 material Substances 0.000 abstract description 11
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000314 lubricant Substances 0.000 description 4
- 239000000110 cooling liquid Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 102220558276 Lipocalin-like 1 protein_C45W_mutation Human genes 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000007592 spray painting technique Methods 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- -1 tungsten carbides Chemical class 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
- B21C3/04—Dies; Selection of material therefor; Cleaning thereof with non-adjustable section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
- B21C3/12—Die holders; Rotating dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
- B21C3/12—Die holders; Rotating dies
- B21C3/14—Die holders combined with devices for guiding the drawing material or combined with devices for cooling heating, or lubricating
Definitions
- the invention relates to the field of drawing dies used for drawing metal wires.
- the drawing die according claim 1 is particularly suited for drawing metal wire in liquid lubricants also called‘wet wire drawing’.
- the nib of the drawing die is held in a nib holder according a second aspect of the invention. Also a method to insert the nib into the nib holder is described representing a third aspect of the invention.
- the wire is drawn through subsequently smaller orifices in drawing dies resulting in a stepwise reduced diameter of the wire.
- the drawing dies are held in a drawing bench that is provided with multiple capstans in between the drawing dies that pull the wire through the orifices.
- a lubricant is applied to the wire to reduce the friction between the drawing die and the wire passing by.
- wet wire drawing dies or simply referred to as ‘drawing dies’ in what follows.
- drawing dies processes and machines,‘wet wire drawing dies’ or simply referred to as ‘drawing dies’ in what follows.
- a typical wire mill uses between hundreds and millions of drawing dies each year.
- Known wet wire drawing dies consist of a cylindrical nib that is held in a cylindrical metal casing.
- the nib is made of a very hard material in which an axial, funnel shaped orifice is machined and polished.
- the casing is made of machine steel.
- GB87225 (D1 ) describes a nib holder (called a‘die holder’ in D1 ) wherein the nib 17 (called‘pellet’ in D1 ) is held in the holder that is provided with a ‘chamber’ with‘radial ports’ leading from the perimeter of the chamber in order to supply cooling medium immediately around the nib.
- the holder is intricate to make and the coolant must be injected into the radial ports in order to cool the nib.
- DE596506 (D2) describes a nib holder‘F’ for a dry drawing die wherein cooling channels are provided in the nib holder.
- the holder is difficult to make and the cooling liquid must be supplied separately.
- GB298821 (D3) describes a housing for a drawing die wherein the
- housing consists of a hollow member enclosing the die, the hollow member being provided with inlet openings in front of the housing and outlet openings at the rear of the housing, the inlet and outlet opening communicating with an annular space between nib and housing for the passage of a cooling liquid in the die.
- the holder is intricate to make and a forced passage of cooling liquid through the drawing die is needed to have good cooling.
- CN201324454U (D4) describes a nib holder provided with outer
- the wire drawing die comprises a nib and a nib holder, the nib having a through hole.
- the through hole will generally have a funnel or trumpet shape.
- the wire enters at the wider entry of the funnel, called‘entry cone’ and exits by the narrower spout. After the spout the through hole opens again in an‘exit cone’.
- the through hole defines a nib axis.
- the nib has a frustoconical and/or cylindrical mantle that is coaxial to the nib axis.
- the mantle of the nib can thus be completely a cylinder over the complete axial length of the nib.
- the mantle of the nib can be that of a single frustocone over the complete axial length of the nib.
- a frustocone is the frustum of a cone.
- the mantle can also be a combination of a cylinder surface over one part of the axial length and a frustocone over the remaining part of the axial length.
- Alternative and equivalent wording is that the nib has a‘substantially cylindrical mantle’.
- the nib holder leaves at least 20% of the surface of the mantle of the nib not covered and this in a limited number of not covered areas.
- With‘not covered area’ is meant that the nib holder does not contact the nib at that area. Possibly the areas are disjoint meaning that a line can be drawn between the areas on the mantle of the nib, not entering the areas.
- the total surface of the not covered areas is at least 20% of the surface of the mantle.
- with the surface of the mantle is meant the surface of the frustoconical and/or cylindrical circumferential mantle of the nib thereby excluding the axial extremal - top and bottom - areas of the nib.
- the number of - possibly disjoint - not covered areas is two or three or four or five or six or seven or eight, up to and including twelve.
- At least 20% of the surface of the mantle is visible i.e. is in the line of sight when viewing the nib held in the nib holder in all directions perpendicular to the nib axis.
- the drawing die solely consists of the nib and the nib holder and no other parts.
- At least 30%, 40%, 50%, 60%, 70% or even 80% of the surface of mantle remains not covered by the nib holder.
- the cooling will further improve with increasing disclosure of mantle surface of the nib it becomes increasingly more difficult to hold the nib in the die holder.
- the purpose of the inventive drawing die is to expose as much mantle of the nib as possible while the nib is held in the nib holder to improve the cooling of the nib.
- the nib holder covers at most 80% of the surface of the mantle of the nib in a number of areas covered by the nib holder, said number of covered areas being one, two, three, four, five, six, seven or eight up to and including twelve.
- the cooling capacity of the nib will increase when the coverage of the nib mantle by the nib holder reduces to at most 70, 60; 50, 40, 30 or even 20 % of the surface of the mantle of the nib.
- the nib is made of a hard material such a cermet, hardmetal, cemented carbide, polycrystalline diamond (PCD) compacts or monocrystalline diamonds from natural or synthetic origin. Mainly used are cemented carbide such as tungsten carbides with e.g. a cobalt containing binder.
- PCD compacts are also preferred for use in the invention.
- the nib holder comprises a base plate from which clamps protrude.
- the clamps serve to hold the nib firmly.
- the clamps are unitary to the base plate meaning that the base plate and the clamps are made of one unitary, single piece of material: there are no welds nor mechanical connections between the base plate and the clamps.
- the base plate has at least one through hole that is coaxial to the nib axis where through, during use, the wire is drawn. The wire is pulled in the direction from the clamps towards the base plate.
- the clamps cover at most 80% of the surface of the nib mantle. Less coverage such as less than 70, 60, 50, 40, 30 or even 20% will further increase the cooling of the nib, but at the expense of being held less well in the die holder. It is preferred that at least 20% of the surface of the mantle is in line of sight when viewing the nib held in the nib holder in all directions perpendicular to the nib axis. The amount of surface visible can also be more than 30, 40, 50, 60, 70 or even 80% of the surface of the mantle.
- the base plate can have any shape but more preferred the base plate has a polygonal shape, for example a regular polygonal shape, or a Reuleaux polygon shape.
- the number of vertices is preferably equal to the number of clamps.
- the base plate has the shape of a ring or annulus.
- the baseplate are angularly evenly distributed. If, for example, the number of clamps is three, the angle between clamps is 120° as viewed from the nib axis. In case the number of clamps is‘N’ the angle between clamps as viewed from the nib axis is 360 N.
- a recess is provided around the through hole in the base plate of the nib holder.
- the recess serves to receive the base of the nib.
- The‘base of the nib’ is one of the surfaces axially delimiting the nib at the side of the nib exit cone.
- the number of clamps is at least two - as one needs at least two clamps to hold something - or any higher number such as two, three, four, five, six, seven or eigth up to and including twelve. Increasing the number of clamps complicates manufacturing. Preferably the number of clamps is three, four, five or six. Depending on the manufacturing method, an even or odd number of clamps may be preferred. When making the nib holder by means of machining an even number of clamps is more preferred while in contrast therewith an odd number of clamps may be more preferred when casting the die holder.
- the transition from the base plate to the clamps protruding from that base plate is rounded. More specific the transition from the base plate to the clamps is rounded between the clamps. With rounded is meant that the transition does not have sharp angles wherein dirt could accumulate. A radius of curvature of at least half a millimetre is a minimum. One, two or more millimetre is better.
- the clamps protruding for the base plate extend at least two thirds of the axial length of said nib out of the base plate. Less extending of the clamps results in too low holding force for the nib. More preferred is that the clamps protrude about the axial length of the nib out of the base plate. More is not needed as this leads to superfluous material.
- the clamps are provided with a protrusion, a projection, bump at the radial inner side of the clamp at the end opposite of the base plate. This protrusion prevents that the nib is pulled out of the nib holder when during wire drawing the machine is stopped and the wire recoils.
- a nib holder is presented.
- the nib holder has a base plate with clamps protruding out the base plate.
- the clamps and the base plate are one whole i.e. unitary.
- the clamps and the base plate are made of the same uninterrupted piece of material.
- the base plate has a through hole at the centre of the base plate for letting the wire pass.
- the nib holder is specifically designed to be used in the drawing die as described in the first aspect of the invention.
- the nib holder has a symmetry axis going through said through hole that is perpendicular to the base plate.
- the protruding clamps are angularly evenly distributed around the symmetry axis.
- the base plate of the nib holder is a ring.
- the number of protruding clamps is two, three, four, five, six, seven or eight or up to and including twelve.
- the transition is rounded.
- the radius of curvature at the transition is higher than half a millimetre, for example one or two or more millimetre. This is to prevent dirt accumulation during use of the drawing die in the wet wire drawing machine.
- the radial inner top of the clamps is provided with a small protrusion, projection, bump for holding the top of the nib. This ensures that the nib will remain in the nib holder when the wire being pulled through recoils at a sudden stop of the machine.
- the clamps are mechanically held by a retainer ring connecting all clamps.
- the retainer ring fits in notches made circumferentially in the top of the clamps.
- the retainer ring serves to give additional strength to the clamps.
- a method to clamp a nib in a nib holder is provided thereby forming a drawing die according the invention.
- the method starts by providing a nib holder according the second aspect of the invention.
- a nib is provided.
- the nib has either a cylindrical or a frustoconical circumferential mantle or a concatenation of both.
- a force is applied at the centre of the base plate while holding the outer rim of the base plate. The force is exerted from the side opposite to the side of the base plate where the clamps protrude. This force opens the clamps very slightly, but enough to allow a temporary grip of the nib. This allows to insert the nib between the protruding clamps.
- the nib is completely pressed into the nib holder. Possibly the nib base is received in the recess of the base plate.
- a fourth aspect of the invention a method to produce the nib holder according the above by metal injection moulding is described.
- the method comprises the steps of:
- Figure 1 shows a prior art wire drawing die
- Figure 2 shows a first wire drawing die according the invention
- Figure 3 shows a second wire drawing die according the invention
- Figure 4 shows a third wire drawing die according the invention
- Figure 5 shows a fourth wire drawing die according the invention
- Figure 6 illustrates the method to insert the nib into the nib holder
- Figure 1 shows a prior art drawing die 100 comprising a nib holder 102, also called‘casing’, and a nib 104.
- the nib has a through hole 110 through which the wire is guided.
- the wire enters at the wide entrance cone 106 and exits through the smaller exit cone 108.
- the through hole thus has the shape of a funnel.
- the nib is made of cemented tungsten carbide with cobalt used as a
- the size and finish of the nibs is standardised in international standards such ISO 1684 and ISO 2804
- the size of the nib is indicated with D*H wherein‘D’ is the outer diameter of the nib (usually in mm) and ⁇ T is the axial height of the nib (also usually expressed in mm).
- a typical nib size is e.g. 12x10 or 16x13.
- the outer mantle shape of the nib is generally cylindrical (when the nib is inserted into the casing by means of ‘hot casing’) or is a combination of a cylindrical surface with a frustoconical chamfer at the side of the exit cone (when the nib is inserted into the casing by means of‘cold casing’).
- Nibs are commercially available from suppliers such as Ceratizit, Hyperion and many others.
- the nib holder is a steel cylinder with a central bore hole wherein the nib is tightly fitted (by means of‘hot’ or‘cold’ casing).
- the mantle of the nib is in close contact with the steel casing it is a general belief that the heat generated in the nib will easily pass the nib-to-steel barrier.
- a micro gap between nib and casing can result leading to a thermal barrier thereby reducing the heat extraction and an in increased nib temperature during drawing.
- Figure 2 shows a first embodiment of the drawing die 200. It consists of a nib 204 that is a conventional nib that is held in nib holder 202.
- the nib holder is of an open design such that about 50% of the outer mantel of the nib 204 is not covered in three disjoint areas. The sum of the not covered areas amounts to about 50% of the mantle surface. Alternatively worded: the nib holder only covers about 50% of the surface nib, leaving the remaining part directly visible.
- the ratio of the surface that is not covered to the total surface of the mantle can be verified by a number of means for example:
- the surface area of the uncovered mantle of the nib is calculated taking into account the cylindrical shape of the nib.
- the nib directly exposed to the coolant in which the drawing die is submerged.
- the coolant can have unimpeded, unhindered, direct contact with the nib without the need of additional coolant feed - through for example channels - to the nib.
- the base plate 212 In the shape of the nib holder 202 one can discern a base plate 212 from which three clamps 214, 214’, 214” protrude out of the plane of the base plate 212.
- the clamps 214, 214’, 214” are distributed along the nib axis under an angle of 120° i.e. are angularly evenly distributed around said axis.
- the clamps and base plate are unitary.
- the base plate 212 is in this case a ring provided with a central through hole for letting the wire pass.
- the drawing die 300 is similarly made out of a single piece of material wherein clamps 314 protrude out of a base plate 312 form the nib holder 302.
- the difference with the first drawing die is that the transition 316 from the base plate to the protruding clamps is rounded. The rounding prevents that dirt can accumulate in the corner between the base plate and the clamp.
- a circular recess is provided to receive the base of the nib (not visible in the Figure 3).
- the clamps taper, get gradually thinner radially towards the nib axis i.e. the circumferential thickness of the clamps diminishes towards the nib axis. In this way the surface of nib mantle remains uncovered while the strength of the clamps is not compromised.
- the nib 404 is held in the die holder 402 by means of six angularly evenly distributed clamps 414.
- the transition from the base plate 412 to the clamp is rounded with a radius of curvature of about 1.5 mm. Note that in this case the width of the clamps 414 remain constant.
- protrusions 422 are provided at the top of the clamps, at the radially inner side. The protrusions 422 are to prevent that the nib 404 would be pulled out of the nib holder 402 by the wire when the drawing machine suddenly stops and the wire recoils, bounces back.
- the six clamps 514 are connected with a retainer ring 520.
- the retainer ring fits in circumferential notches 524 made in the top of the clamps.
- the retainer ring adds additional strength to the clamps 514.
- the material of which the nib holder is made of is tool steel or machine steel. Examples are EN 11 SMnPb30 and EN C45E or similar.
- a mould can be made by a lost wax technique representing the nib holder. Pouring molten metal in the mold and opening the mold after solidification results in a cast. The cast must further be finished to obtain the desired tolerances which make this method somewhat less preferred.
- the colours‘green’ and‘brown’ are customarily used in the field of metal injection moulding but do not bear any relation to the true colour of the part. They are only indicative of the state of the sleeve:‘green’ can be substituted by‘fresh’ and‘brown’ by‘baked’.
- the technique allows to make die holders in large quantities and at low cost. Nib holders made by this technique show some tiny bubbles of entrapped gasses inside the metal. The tiny bubbles are an indication that this metal injection moulding technique has been used.
- Figures 6,‘a’ to‘d’ illustrate the method of how to insert the nib into the nib holder according the invention.
- FIG. 6‘a’ a nib holder 602 according the invention and a nib 602 for insertion into the nib holder 602 are provided.
- the nib holder 602 is placed in clamps 630, 630’ that grip the base plate 612 of the nib holder 602 in between the protruding clamps 614 of the nib holder 602.
- a stamp 632 is pressed against the centre of the base plate.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18193620 | 2018-09-11 | ||
PCT/EP2019/073947 WO2020053127A1 (en) | 2018-09-11 | 2019-09-09 | Drawing die with associated nib holder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3849722A1 true EP3849722A1 (en) | 2021-07-21 |
EP3849722B1 EP3849722B1 (en) | 2023-07-26 |
Family
ID=63557269
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19762819.1A Active EP3849722B1 (en) | 2018-09-11 | 2019-09-09 | Drawing die with associated nib holder |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3849722B1 (en) |
CN (1) | CN112672834B (en) |
ES (1) | ES2960556T3 (en) |
WO (1) | WO2020053127A1 (en) |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE534380C (en) * | 1931-09-25 | Oskar Diener Dipl Ing | Cooling device for drawing dies | |
US1597927A (en) * | 1923-12-21 | 1926-08-31 | Simons Abraham | Diamond die |
GB298821A (en) | 1928-01-05 | 1928-10-18 | James Robert Simpson | Housing for wire drawing dies |
DE596506C (en) * | 1932-07-15 | 1934-05-03 | Stahlwerke Roechling Buderus A | Device for cooling set drawing dies |
US2028652A (en) * | 1934-06-29 | 1936-01-21 | Mulatier Jean De | Drawing of wires |
FR791345A (en) * | 1934-06-29 | 1935-12-07 | Improvements to the drawing or drawing of metal wires | |
DE682336C (en) * | 1936-06-05 | 1939-10-12 | Meutsch Voigtlaender & Co Vorm | Die for drawing circular, grooved or protruding profiles |
US2924329A (en) * | 1958-04-10 | 1960-02-09 | Western Electric Co | Wire finishing device |
GB872225A (en) * | 1958-10-30 | 1961-07-05 | Danite Hard Metals Ltd | Improvements in and relating to wire drawing dies |
GB896478A (en) * | 1959-10-14 | 1962-05-16 | Cyril George Pullin | Improvements in and relating to dies for the purpose of drawing wire, strips or sections |
DE1273471B (en) * | 1962-03-30 | 1968-07-25 | Hard Alloys Ltd | Drawing tool |
JPS5120053A (en) * | 1974-08-10 | 1976-02-17 | Kobe Steel Ltd | SHINSENREIKYAKUHO |
JPS5156759A (en) * | 1974-11-15 | 1976-05-18 | Hitachi Metals Ltd | Onkanhikinukihoho oyobi sochi |
DE3001671A1 (en) * | 1980-01-18 | 1981-07-23 | Karl Sieber GmbH & Co KG Fabrik für Umformwerkzeuge, 2000 Norderstedt | DIE FOR SOLID FORMING IN THE COLD OR SEMI-WARM PROCESS |
US4405074A (en) * | 1981-08-31 | 1983-09-20 | Kulicke And Soffa Industries Inc. | Composite bonding tool and method of making same |
CN2103385U (en) * | 1991-09-07 | 1992-05-06 | 邵义弘 | Taper reducing die |
JPH0957331A (en) * | 1995-08-21 | 1997-03-04 | Fuji Dies Kk | Collet type drawing die |
JP2007054865A (en) * | 2005-08-24 | 2007-03-08 | Asahi Diamond Industrial Co Ltd | Die device for wire drawing |
CN201324454Y (en) | 2008-12-16 | 2009-10-14 | 邢台供电公司 | Safety belt hanger |
CN202398642U (en) * | 2011-12-09 | 2012-08-29 | 江苏星火特钢有限公司 | Wortle water-cooling die sleeve |
CN202752366U (en) * | 2012-09-06 | 2013-02-27 | 赣州虹飞钨钼材料有限公司 | Wire-drawing die clamping sleeve |
CN103406380A (en) * | 2013-08-17 | 2013-11-27 | 昆山西诺巴精密模具有限公司 | Cooling die sleeve |
CN107377646A (en) * | 2017-08-28 | 2017-11-24 | 铜陵市创威科技有限责任公司 | A kind of wire-drawing die and its method of work with heat sinking function |
CN207709555U (en) * | 2017-12-27 | 2018-08-10 | 江西信昌工业制造有限公司 | A kind of wire-drawing die facilitating heat dissipation |
-
2019
- 2019-09-09 WO PCT/EP2019/073947 patent/WO2020053127A1/en unknown
- 2019-09-09 CN CN201980059670.1A patent/CN112672834B/en active Active
- 2019-09-09 ES ES19762819T patent/ES2960556T3/en active Active
- 2019-09-09 EP EP19762819.1A patent/EP3849722B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN112672834A (en) | 2021-04-16 |
EP3849722B1 (en) | 2023-07-26 |
WO2020053127A1 (en) | 2020-03-19 |
ES2960556T3 (en) | 2024-03-05 |
CN112672834B (en) | 2024-03-08 |
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