EP1073534B1 - Verfahren und vorrichtung zum warmpressen von werkstücken - Google Patents
Verfahren und vorrichtung zum warmpressen von werkstücken Download PDFInfo
- Publication number
- EP1073534B1 EP1073534B1 EP99913052A EP99913052A EP1073534B1 EP 1073534 B1 EP1073534 B1 EP 1073534B1 EP 99913052 A EP99913052 A EP 99913052A EP 99913052 A EP99913052 A EP 99913052A EP 1073534 B1 EP1073534 B1 EP 1073534B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ejector
- hot
- die
- liquid
- workpiece
- 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.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/04—Shaping in the rough solely by forging or pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/08—Accessories for handling work or tools
- B21J13/14—Ejecting devices
Definitions
- the present invention relates to a method for hot pressing workpieces and a hot forming machine to carry out this procedure as described in the preambles of independent claims 1 and 4 defined (see e.g. US-A-3 120 769).
- a multi-stage hot forming machine in which the scale in the die of the first forming station is broken off from the workpiece is in Japanese Utility Model No. 2521909 described.
- the flaking of the scale inside the die has the disadvantage that the tinder for the most part again is pressed into the workpiece. This has a worse one Surface quality resulted in what a more extensive Machining post-processing and more machining allowance required makes what the material requirement and thus the Cost per workpiece can be increased.
- hot forming machines where descaling takes place in a separate first forming station he follows.
- a hot forging press is in CH 594 454 described, in which the workpieces outside be pre-compressed by a die, which is also called free diving, the tinder breaks off and falls off the workpieces. That descaled and pre-compressed workpiece is then with a pair of pliers transported to the second forming station and into the die introduced there, in which it is molded.
- JP-A-60030545 is a vertical forming machine for the forming of a workpiece in a closed die known.
- a lowering sled presses first an upper outer stamp in a die against the previous one inserted workpiece. After that, become an upper inner Stamp and a lower inner stamp pressure monitored by pressed into the workpiece at the top or bottom. Ejecting the formed workpiece is finally done by means of of a lower outer stamp.
- An upsetting of the Workpieces outside the die are not intended.
- Descaling is the invention of the based on the following task.
- a procedure has to be created for hot pressing workpieces of the type mentioned at the beginning, in which descaling of the workpieces outside of one Die is made without an additional forming station is needed.
- Claim 4 relates to an inventive Hot forming machine for carrying out the Process. Preferred design variants result from the dependent claims.
- the essence of the invention is that in a method for hot pressing of workpieces, in which a Forging temperature of a heated workpiece outside a die descaled by pre-compression using a stamp and then into one or more matrices in the desired shape is pressed, pre-upsetting and that Molding in the first or only die through the same Press stamp in the same movement cycle of the press stamp he follows.
- a workpiece to be pressed in a single forming station with a single press ram in a movement cycle first outside one Matrix pre-compressed and descaled and then in a matrix be compression molded. Because the descaling outside a matrix, i.e. detached, is done, the chipped Tinder not pressed back into the workpiece, like this that its surface quality is not affected.
- Hot forming machine saved a forming station and also a self-centering tongs is not necessary as the transport to the next one Forming station only after pressing in the die takes place, after which the workpieces have a defined outer contour have.
- the hot pressing process according to the invention thus combines the advantages of the two known, described above Descaling processes without their disadvantages exhibit.
- a preferred embodiment of a hot forming machine for carrying out the method according to the invention at least one die, a corresponding off and retractable ejector and a forward and backward movable Press temple.
- means are available with which the retraction of the extended ejector through the forward moving ram about Workpiece arranged between ejector and ram is so delayed that the workpiece is outside the die is pre-compressible.
- the means of delaying the ejector rebound and the insertion of the workpiece into the die for example hydraulic, pneumatic, mechanical or electromechanical means.
- Hydraulic or pneumatic delay means include in a preferred embodiment, one in one Pressure chamber arranged, directly or indirectly with the ejector connected control piston and means for feeding and discharging liquid or gas into or out of the Pressure chamber.
- the liquid or gas laxatives are formed such that the liquid or gas discharge partially delayed from the pressure chamber and the repulsion of the control piston and the ejector is delayed.
- They advantageously comprise a liquid or Gas discharge line, in which a throttle or a pressure relief valve is arranged, which is only at one certain liquid or gas pressure opens, or with a control pin is opened and closed.
- An advantageous hot forming machine according to the invention with mechanical delay means includes a rotatable Curve for controlling the extension and retraction of the ejector, which are shaped and their rotation with the forward and backward movement of the press stamp is coordinated that the The retracted ejector is pushed back with a delay.
- the illustrated first embodiment of an inventive Hot-forming machine comprises one by means of a Die holder 6 between an anvil 15 and an anvil cover 18 arranged die 5, which for receiving and Compression molding of a workpiece 4 is used.
- the bottom of the die 5 has a hole for an extendable and retractable Ejector 7 on, during the pre-upsetting as a pressing resistor for the adjacent workpiece 4, during compression molding as a shaping part for the workpiece 4 and after the compression molding for pushing out the formed workpiece from the die 5 is used.
- the ejector 7 is with one slidably arranged in a pressure chamber 28
- Control piston 8 connected to a pressure ring 12 for Adjustment of the ejector position is provided.
- the pressure chamber 28 is formed in a clamping ring 13 to which the Die holder 6 screwed on a position wedge 19 is.
- Control piston 8 with an ejector pin 9 and this with an ejector rod 17 connected in a known manner indirectly by means of a curve, not shown, in the direction Die 5 is slidable.
- the ejector pin 9 is in a deposit 14 performed, which also for receiving Serves pressing forces and abuts a pressure plate 16.
- a cooling channel 141 In the backing 14 is a cooling channel 141 and in the ejector pin 9, a cooling channel 91 is arranged, over which one axially extending in the control piston 8 and ejector 7 die hole 10 coolant can be supplied.
- the ejector 7 Outlet openings 11 are provided.
- the clamping ring 13 with a Coolant relief opening 159 provided by leads the anvil 15.
- the clamping ring 13 and the anvil cover 18 are dashed with a shown liquid inlet bore 21 and a liquid outlet bore, also shown in dashed lines 24 provided.
- a liquid supply line 20 is connected, in which a check valve 22 is arranged.
- a liquid discharge line 23 connected in the one to one Pressure of 350 bar insertable throttle 25 for deceleration the liquid outflow from the pressure chamber 28 is arranged is.
- the workpiece 4 is pressed by means of a press ram 1, each in two different positions is shown in half. In the upper position it is still undeformed workpiece 4 between one by means of a Tension spring 3 biased towards the die 5 holding pin 2 and the ejector 7 held.
- the preload on the retaining pin 2 can alternatively also be done by means of air pressure.
- the punch 1 has the workpiece in the lower position 4 pre-compressed and descaled and begins now to push this into the die 5.
- the workpiece 4 is moved forward by the Press stamp 1 pre-compressed in that the ejector 7 due to the resistance of the throttle 25 to fluid drainage from the pressure chamber 28 through the control piston 8 is held in its extended position.
- On easy yielding, i.e. Retracting the ejector 7 during pre-upsetting has no negative impact the descaling and removal of the scale outside of the Die 5.
- the further moving die 1 in the Die 5 pushed, the resistance of the throttle 25th against a liquid drain through the increasing Pressure is overcome, and compression molded there.
- the ejector 7 pushes the mold - driven by the Above-mentioned curve, not shown, over the ejector rod 17, the ejector pin 9 and the control piston 8 - the workpiece 4 out of the die 5 so that it for example, can be taken over by transport tongs can.
- the illustrated second embodiment differs from the first in that in the liquid discharge line 23 instead of a throttle 25, a pressure relief valve 26 is arranged with a control line 27. It can for example a pressure relief valve for up to approx. 350 bar from Bieri, Bern.
- a pressure relief valve 26 is arranged with a control line 27. It can for example a pressure relief valve for up to approx. 350 bar from Bieri, Bern.
- the pressure on the control piston 8 and thus in the Pressure chamber 28 and liquid discharge line 23 so strong increases that the previously closed pressure relief valve 26 is opened via the control line 27 and so liquid can drain off.
- the ejector 7 retracted and the workpiece 4 inserted into the die 5 and molded there.
- the workpiece 4 and the stamp 1 are shown here at the end of the compression molding.
- the pressing of the workpiece 4 is two shown at different times.
- the rear part of the control pin 30 lies on the ejector pin 9 on and its front part closes the liquid discharge line 29 so no liquid from the Pressure chamber 28 can flow away.
- the ejector rod 17 and the control pin 30 then begin to move backward and the workpiece 4 is then moved forward by the Press stamp 1 pre-compressed until finally the situation shown in the lower half of the figure is reached, i.e. the workpiece 4 pre-compressed and descaled and the control pin 30 is immediately in front of it, to open the liquid discharge line 29.
- the ejector rod 17 and the control pin 30 are still moved further backward so that through the liquid discharge line 29 Drain liquid from the pressure chamber 28 can, whereby the control piston 8 and the ejector 7th Direction ejector rod 17 and the workpiece 4 in the die 5 can be pushed.
- the length of the control pin 30 can be selected according to the desired pre-compression path become.
- the control piston 8 and the ejector 7 can be moved backwards on the one hand indirectly controlling the ejector rod 17 Curve be designed so that they have such a backward movement permits, and on the other hand funds must be provided that are responsible for this backward movement.
- the backward movement generated by a spring 32 is the backward movement generated by a spring 32.
- the ejector rod 17 articulated to one over the To couple curve controlled ejector levers so they not only pushed forward by it, but also backwards is pulled.
- the hot forming machine comprises a machine body 130 and a tool block 100 in which a die 105 and an associated extendable and retractable ejector 107, which is essentially the ejector 7 of the first embodiment corresponds, are arranged.
- the ejector 107 is via an ejector pin 109 with an axially displaceable Ejector rod 117 connected.
- One around an axis 152 rotatable ejector lever 150 has a pressure pin 151 for the ejector rod 117 and a freely rotatable roller 153, which abuts a curve 160.
- the ejector lever 150 is biased by means of a tension spring 170, that the roller 153 is constantly on the curve 160.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Press Drives And Press Lines (AREA)
Description
- Fig. 1 -
- eine Schnittansicht eines Teils eines ersten Ausführungsbeispiels einer erfindungsgemässen Warmumformmaschine mit hydraulischen Verzögerungsmitteln mit einer Drossel während des Vorstauchens;
- Fig. 2 -
- eine Schnittansicht eines Teils eines zweiten Ausführungsbeispiels einer erfindungsgemässen Warmumformmaschine mit hydraulischen Verzögerungsmitteln mit einem Druckbegrenzungsventil anstelle der Drossel am Ende des Formpressens;
- Fig. 3 -
- eine Schnittansicht eines Teils eines dritten Ausführungsbeispiels einer erfindungsgemässen Warmumformmaschine mit hydraulischen Verzögerungsmitteln mit einem Steuerstift während des Vorstauchens und
- Fig. 4 -
- eine Schnittansicht eines Teils eines vierten Ausführungsbeispiels einer erfindungsgemässen Warmumformmaschine mit mechanischen Verzögerungsmitteln.
Claims (12)
- Verfahren zum Warmpressen von Werkstücken, bei dem ein auf Schmiedetemperatur erhitztes Werkstück (4) ausserhalb einer Matrize (5; 105) durch Vorstauchen mittels eines Pressstempels (1) entzundert wird und danach in einer oder mehreren Matrizen (5; 105) in die gewünschte Form gepresst wird, dadurch gekennzeichnet, dass das Vorstauchen und das Formpressen in der ersten bzw. einzigen Matrize (5; 105) durch denselben Pressstempel (1) im selben Bewegungszyklus des Pressstempels (1) erfolgt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Werkstück (4) beim Vorstauchen durch einen ausgefahrenen Auswerfer (7; 107) der ersten bzw. einzigen Matrize (5; 105) ausserhalb dieser gehalten wird und nach dem Vorstauchen durch den Druck des sich vorwärts bewegenden Pressstempels (1) in die Matrize (5; 105) befördert wird, wo es durch die weitere Vorwärtsbewegung des Pressstempels (1) formgepresst wird.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass das Werkstück (4) bereits während des Vorstauchens zur Matrize (5; 105) hinbewegt wird, wobei aber die Bewegungsgeschwindigkeit im Vergleich zu der Bewegungsgeschwindigkeit nach dem Vorstauchen klein ist.
- Warmumformmaschine zur Durchführung des Verfahrens nach Anspruch 1, 2 oder 3, mit mindestens einer Matrize (5; 105), einem dazugehörigen aus- und einfahrbaren Auswerfer (7; 107) und einem vor- und rückwärtsbewegbaren Pressstempel (1), dadurch gekennzeichnet, dass Mittel vorhanden sind, mit denen das Zurückstossen des ausgefahrenen Auswerfers (7; 107) durch den sich vorwärtsbewegenden Pressstempel (1) über ein zwischen Auswerfer (7; 107) und Pressstempel (1) angeordnetes Werkstück (4) derart verzögerbar ist, dass damit das Werkstück (4) ausserhalb der Matrize (5; 105) vorstauchbar ist.
- Warmumformmaschine nach Anspruch 4, dadurch gekennzeichnet, dass die genannten Verzögerungsmittel einen in einer Druckkammer (28) angeordneten, direkt oder indirekt mit dem Auswerfer (7) verbundenen Steuerkolben (8) sowie Mittel zum Zuführen und Abführen von Flüssigkeit oder Gas in die bzw. aus der Druckkammer (28) umfassen, wobei die Flüssigkeits- oder Gasabführmittel derart ausgebildet sind, dass die Flüssigkeits- oder Gasabführung aus der Druckkammer (28) teilweise verzögert erfolgt und das Zurückstossen des Steuerkolbens (8) und des Auswerfers (7) verzögert.
- Warmumformmaschine nach Anspruch 5, dadurch gekennzeichnet, dass die Flüssigkeits- oder Gasabführmittel eine Flüssigkeits- oder Gasabführleitung (23) umfassen, in der eine Drossel (25) angeordnet ist.
- Warmumformmaschine nach Anspruch 5, dadurch gekennzeichnet, dass die Flüssigkeits- oder Gasabführmittel eine Flüssigkeits- oder Gasabführleitung (23) umfassen, in der ein Druckbegrenzungsventil (26) angeordnet ist, das sich erst bei einem gewissen Flüssigkeits- oder Gasdruck öffnet.
- Warmumformmaschine nach Anspruch 5, dadurch gekennzeichnet, dass die Flüssigkeits- oder Gasabführmittel eine Flüssigkeits- oder Gasabführleitung (29) umfassen, die mit einem Steuerstift (30) geöffnet und geschlossen wird.
- Warmumformmaschine nach Anspruch 8, dadurch gekennzeichnet, dass der Steuerstift (30) mit einer vor- und rückwärtsbewegbaren Auswerferstange (17) zum Ausfahren des Auswerfers (7) verbunden ist, wobei Mittel (32) vorhanden sind, um die Auswerferstange (17) vor dem Einfahren des Auswerfers (7) rückwärts zu bewegen.
- Warmumformmaschine nach Anspruch 4, dadurch gekennzeichnet, dass sie eine rotierbare Kurve (160) zur Steuerung des Aus- und Einfahrens des Auswerfers (107) umfasst, die so geformt und deren Rotation so mit der Vorund Rückwärtsbewegung des Pressstempels koordiniert ist, dass das Zurückstossen des ausgefahrenen Auswerfers (107) verzögert erfolgt.
- Warmumformmaschine nach Anspruch 10, dadurch gekennzeichnet, dass die Stellung der rotierbaren Kurve (160) bezüglich der Pressstempelstellung verstellbar ist.
- Warmumformmaschine nach Anspruch 10 oder 11, dadurch gekennzeichnet, dass mit der Kurve (160) ein Auswerferhebel (150) hin- und herbewegbar ist, mit dem der Auswerfer (107) über eine Auswerferstange (117) und eventuell einen Auswerferbolzen (109) aus- und wieder einfahrbar ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH93498 | 1998-04-24 | ||
CH93498 | 1998-04-24 | ||
PCT/CH1999/000155 WO1999055475A1 (de) | 1998-04-24 | 1999-04-19 | Verfahren zum warmpressen von werkstücken |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1073534A1 EP1073534A1 (de) | 2001-02-07 |
EP1073534B1 true EP1073534B1 (de) | 2002-10-23 |
Family
ID=4198579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99913052A Expired - Lifetime EP1073534B1 (de) | 1998-04-24 | 1999-04-19 | Verfahren und vorrichtung zum warmpressen von werkstücken |
Country Status (13)
Country | Link |
---|---|
US (1) | US6286350B1 (de) |
EP (1) | EP1073534B1 (de) |
JP (1) | JP3524496B2 (de) |
KR (1) | KR100400706B1 (de) |
CN (1) | CN1089653C (de) |
AU (1) | AU3135399A (de) |
CZ (1) | CZ296945B6 (de) |
DE (1) | DE59903173D1 (de) |
EA (1) | EA002505B1 (de) |
ES (1) | ES2182502T3 (de) |
TW (1) | TW453913B (de) |
UA (1) | UA54590C2 (de) |
WO (1) | WO1999055475A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100386166C (zh) * | 2006-07-10 | 2008-05-07 | 北京科技大学 | 非晶合金精密零件一锻多件超塑性成形装置 |
CN101885033B (zh) * | 2009-05-11 | 2012-08-29 | 福光企业股份有限公司 | 锻造部品成型机的顶托通出装置 |
JP5556649B2 (ja) * | 2010-12-22 | 2014-07-23 | 三菱自動車工業株式会社 | 熱間鍛造プレス成形方法及びその装置 |
RU2552819C1 (ru) * | 2011-05-23 | 2015-06-10 | Ниппон Стил Энд Сумитомо Метал Корпорейшн | Способ горячего прессования и форма для горячего прессового формования |
GB201116668D0 (en) * | 2011-09-27 | 2011-11-09 | Imp Innovations Ltd | A method of forming parts from sheet steel |
NL2011052C2 (nl) * | 2013-06-27 | 2015-01-05 | Bosch Sprang Beheer B V | Thermovorminrichting. |
CN103769860A (zh) * | 2013-11-27 | 2014-05-07 | 山东建筑大学 | 一种高速铁路桥梁支座的模锻成形方法 |
KR102264554B1 (ko) * | 2019-11-29 | 2021-06-14 | 대산전자(주) | 버스 바의 제조방법 및 이를 통해 제조된 버스 바, 및 릴 |
CN111673586A (zh) * | 2020-06-17 | 2020-09-18 | 龙岩市武平县谨行科技有限公司 | 一种新型不锈钢制品生产用表面毛刺清理装置 |
CN113245492B (zh) * | 2021-05-19 | 2023-07-04 | 中国第二重型机械集团德阳万航模锻有限责任公司 | 大型整体框锻造模具的制备方法及挤压扩孔方法 |
CN116372071B (zh) * | 2023-06-06 | 2023-08-08 | 江苏金源高端装备股份有限公司 | 一种轨道交通变速箱行星齿轮箱支撑组件的铸造设备 |
CN117696817B (zh) * | 2024-02-05 | 2024-05-10 | 山西天宝集团有限公司 | 新能源风力发电法兰锻造用智能自动旋转工作台及其方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1120848B (de) | 1959-04-30 | 1961-12-28 | Fritz Bernhard Hatebur | Presse zur Verformung von Stangenabschnitten durch Stauchen |
US3120769A (en) * | 1960-08-29 | 1964-02-11 | Hatebur Fritz Bernhard | Pressing device for cold forming or hot forming workpieces |
US3584498A (en) * | 1967-11-09 | 1971-06-15 | Hans Beche | Fluid-operated drop-forge press |
US3748887A (en) * | 1971-10-01 | 1973-07-31 | Ladish Co | Method and apparatus for locating stock in forming dies |
JPS5118259A (en) | 1974-08-06 | 1976-02-13 | Tomio Ishida | Netsukanfuoomaaniokeru naigairindojiseizosochi |
JPS57177845A (en) | 1981-02-07 | 1982-11-01 | Aida Eng Ltd | Press-forming method for bevel gear and its die |
JPS6030545A (ja) | 1983-07-28 | 1985-02-16 | Sumitomo Heavy Ind Ltd | 閉塞鍛造装置 |
-
1999
- 1999-04-19 UA UA2000105919A patent/UA54590C2/uk unknown
- 1999-04-19 KR KR10-2000-7011740A patent/KR100400706B1/ko not_active IP Right Cessation
- 1999-04-19 WO PCT/CH1999/000155 patent/WO1999055475A1/de active IP Right Grant
- 1999-04-19 CZ CZ20003924A patent/CZ296945B6/cs not_active IP Right Cessation
- 1999-04-19 JP JP2000545659A patent/JP3524496B2/ja not_active Expired - Fee Related
- 1999-04-19 ES ES99913052T patent/ES2182502T3/es not_active Expired - Lifetime
- 1999-04-19 US US09/673,685 patent/US6286350B1/en not_active Expired - Fee Related
- 1999-04-19 DE DE59903173T patent/DE59903173D1/de not_active Expired - Fee Related
- 1999-04-19 CN CN99805386A patent/CN1089653C/zh not_active Expired - Fee Related
- 1999-04-19 AU AU31353/99A patent/AU3135399A/en not_active Abandoned
- 1999-04-19 EP EP99913052A patent/EP1073534B1/de not_active Expired - Lifetime
- 1999-04-19 EA EA200001100A patent/EA002505B1/ru not_active IP Right Cessation
- 1999-04-20 TW TW088106302A patent/TW453913B/zh not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE59903173D1 (de) | 2002-11-28 |
CZ20003924A3 (en) | 2001-05-16 |
WO1999055475A1 (de) | 1999-11-04 |
KR100400706B1 (ko) | 2003-10-08 |
CN1298329A (zh) | 2001-06-06 |
ES2182502T3 (es) | 2003-03-01 |
EP1073534A1 (de) | 2001-02-07 |
JP3524496B2 (ja) | 2004-05-10 |
EA002505B1 (ru) | 2002-06-27 |
EA200001100A1 (ru) | 2001-04-23 |
UA54590C2 (uk) | 2003-03-17 |
AU3135399A (en) | 1999-11-16 |
US6286350B1 (en) | 2001-09-11 |
CZ296945B6 (cs) | 2006-08-16 |
TW453913B (en) | 2001-09-11 |
JP2002512888A (ja) | 2002-05-08 |
KR20010042922A (ko) | 2001-05-25 |
CN1089653C (zh) | 2002-08-28 |
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