EP3475010A1 - Lochpresse - Google Patents
LochpresseInfo
- Publication number
- EP3475010A1 EP3475010A1 EP17736591.3A EP17736591A EP3475010A1 EP 3475010 A1 EP3475010 A1 EP 3475010A1 EP 17736591 A EP17736591 A EP 17736591A EP 3475010 A1 EP3475010 A1 EP 3475010A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cap
- workpiece
- punch press
- compression
- press according
- 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
- 230000006835 compression Effects 0.000 claims description 48
- 238000007906 compression Methods 0.000 claims description 48
- 230000008878 coupling Effects 0.000 claims description 29
- 238000010168 coupling process Methods 0.000 claims description 29
- 238000005859 coupling reaction Methods 0.000 claims description 29
- 238000003825 pressing Methods 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/10—Piercing billets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/02—Special design or construction
- B21J9/04—Piercing presses
Definitions
- the invention relates to a punch press according to the preamble of claim 1.
- the height can be achieved by about 25% compared to conventional perforated presses with separate drive members for compression force and hole force.
- a frame of the punch press can be made stiffer and the dimensional accuracy of the formed workpiece can be increased.
- a moving mass of the punch press can also be significantly reduced.
- a punch press according to the invention can generally be used for hot or cold forming of workpieces of any material. It is preferably a punch press for hot forming a workpiece made of steel.
- the punch press is part of a production plant for producing seamless pipes, in particular of steel.
- the workpiece punched in the punch press is preferably transferred in the same heat to a subsequent processing, for example a push bench, rolling mill or the like.
- the workpiece may initially have any shape, for example as a solid cylinder or as a square billet.
- a drive member in the sense of the invention is any actuator for exercising a force sufficient for forming the workpiece in the linear direction.
- the drive member comprises a hydraulic cylinder.
- An upsetting cap and a perforated cap are preferably components which come into direct contact with the workpiece for forming and thereby experience corresponding mechanical loads and wear.
- a transducer is within the meaning of the invention, a hollow mold, in which the workpiece is introduced, wherein it is supported in the course of the forming of the hollow mold. Due to the concomitant wear of the pick-up may preferably have a removable inner wall, for example in the manner of a removable sleeve.
- the second deformation or perforation of the workpiece can take place depending on the requirements as rising or filling deformation in the transducer. Preferably, an increasing transformation is provided.
- a frictional connection between the compression cap and the drive member via a detachable coupling member can be produced.
- the coupling member may be formed in various ways mechanical component to allow a releasable coupling, for example as a rod, toggle, link, cam or the like. Generally preferred, the coupling and decoupling of the coupling member is actuated automatically.
- the coupling member comprises at least one coupling rod which can be attached between a traverse and the compression cap.
- the attached coupling rod forms a simple and highly stable power transmission means of the traverse on the compression cap.
- the traverse only acts on the hole cap over the piercer and no longer on the compression cap.
- the attachment and removal of the coupling rod can be automated, for example via a manipulator.
- the coupling rod may have the shape of a partial sleeve to improve the force distribution to at least partially surround the piercer. There may be provided several coupling rods to improve the power distribution.
- the punch press has only one traverse. As a result, the design of the punch press is much easier and cheaper.
- a cross member is understood in the context of the invention, a component that is movably guided relative to a frame of the press and transmits at least a major part of a forming force.
- the compression cap is guided displaceably on the piercer. This allows not only a simple mechanical realization of the invention but also the use of the compression cap for guiding the piercer.
- the compression cap has an upsetting surface which is aligned with the perforated cap, wherein the first deformation is achieved by a common pressing of the Upset surface and the hole cap against the workpiece.
- the compression cap is guided displaceably in the transducer. This allows precise alignment of both the stuffer box and the piercer and the associated hole cap.
- the compression cap bears against the workpiece during the second deformation and is moved with the deformation of the workpiece in the receiver.
- a respectively optimal position of the compression cap with respect to a guide of the piercing pin is ensured in particular with increasing deformation.
- a guide of the punching mandrel relative to the pickup takes place by the upset cap during the second forming.
- An emigration of the hole cap is hereby avoided and dimensional accuracy of the punched workpiece is significantly improved.
- a shear ring is arranged on the receiver, a bottom of the perforated workpiece being separated by means of the shear ring. This allows the production of a dimensionally accurate hollow cylinder by means of the punch press.
- Fig. 1 shows a punch press according to the invention in a state before a first forming operation and decoupled from a drive member
- Fig. 2 shows the punch press of FIG. 1 after a coupling of the
- Fig. 3 shows the punch press of Fig. 2 after a preparation of the compression cap on a workpiece.
- Fig. 4 shows the punch press of Fig. 3 after a first forming operation.
- Fig. 5 shows the punch press of FIG. 4 after decoupling the
- Fig. 6 shows the punch press of Fig. 5 after a second forming process, wherein a hole cap has pierced the workpiece.
- FIGS. 1 to 6 show a punch press according to the invention in various, chronologically successive operating states.
- the punch press comprises a pickup 1, in which a workpiece 2 can be used.
- the transducer 1 is hollow cylindrical in shape, oriented perpendicular to an axis of the hollow cylinder and has an exchangeable for maintenance inner wall in the form of a sleeve 1 a.
- the workpiece is inserted by a manipulator, not shown, in the transducer.
- the workpiece is made of a steel and is at a temperature for hot working.
- a counter-holder 3 which supports the workpiece 2 from below.
- the counter-holder 3 can be removed at the end of a forming process or for maintenance purposes. In the attached state has the Counterholder the function of a rigid and immovable bottom of the picker 1.
- a perforated mandrel 4 is accommodated on a driveable movable cross member 5.
- the cross member 5 is slidably mounted on guides, not shown, of a frame.
- a drive member 6 of the punch press is presently formed by the traverse and a force acting on the traverse hydraulic cylinder 6.
- the traverse 5 is moved by the hydraulic cylinder in the extension direction of the piercer. In the case of the traverse 5, this is the only traverse of the punch press.
- the perforated mandrel 4 carries at its end facing the workpiece 2 an exchangeable hole cap 7.
- a compression cap 8 surrounds the piercer 4 in the manner of a ring and is displaceably guided on the piercer 4. In a lower position of the compression cap 8 this is held by the hole cap 7 as a stop. In this position (see, for example, FIG. 1), an upsetting surface 8a of the compression cap 8 facing the workpiece and an active surface 7a of the perforated cap 7 facing the workpiece are aligned.
- An outer circumference of the compression cap 8 is also dimensioned so that the compression cap 8 is guided displaceably in the transducer 1.
- a game between the transducer wall and the compression cap 8 is chosen so that even with the temperatures occurring mobility is ensured with the most accurate guidance possible.
- the compression cap 8 which can be moved on the perforated mandrel 4 can be detachably fixed in the lower position by means of a coupling element in the form of a coupling rod 9 (see FIG. 2).
- a coupling element in the form of a coupling rod 9 (see FIG. 2).
- the coupling rod 9 is shaped in the manner of a sleeve open on one side and surrounds the piercer partially for the purpose of a better power distribution.
- the coupling rod in the present case has a substantially part-circular cross-section. In other embodiments, elliptical, polygonal or other cross-sectional shapes may also be present.
- the coupling rod may also consist of several sub-rods, which are recognized at different positions of the circumference of the piercing pin. In the attached state, the coupling rod, the piercer and the compression cap are each coaxial.
- a shear ring 10 is disposed in the lower end of the pickup 1 on the anvil 3.
- a bottom of the then perforated workpiece can be pierced at the end of the forming process.
- a heated to forming temperature workpiece for example in the form of a steel billet, inserted into the transducer 1.
- the compression cap 8 is first decoupled from the drive member 5, 6 and the coupling rod 9 does not engage.
- the coupling rod 9 is attached to the piercer 4, so that a non-positive support between the traverse 5 and the compression stop located at the bottom stop 8 is made (see Fig. 2).
- the piercing mandrel 4 is retracted with the hole cap 7 and the compression cap 8 in the pickup 1 until the crush surface 8a and the active surface 7a abut the workpiece 2 (see Fig. 3).
- an upsetting force is exerted by means of the hydraulic cylinder 6, so that the workpiece 2 is pre-compressed in the course of a first transformation (see FIG. 4). After the pre-compression or first deformation, the workpiece 2 fills the transducer in the transverse direction at least so far that there is no longer any free movement play in the transverse direction.
- the compression cup continuously exerts a leading function for the piercer 4, so that lateral migration of the perforated cap 7 is optimally avoided.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016211597.9A DE102016211597A1 (de) | 2016-06-28 | 2016-06-28 | Lochpresse |
PCT/EP2017/065870 WO2018002060A1 (de) | 2016-06-28 | 2017-06-27 | Lochpresse |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3475010A1 true EP3475010A1 (de) | 2019-05-01 |
EP3475010B1 EP3475010B1 (de) | 2020-11-25 |
Family
ID=59295173
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17736591.3A Active EP3475010B1 (de) | 2016-06-28 | 2017-06-27 | Lochpresse |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3475010B1 (de) |
CN (1) | CN109414752B (de) |
DE (1) | DE102016211597A1 (de) |
WO (1) | WO2018002060A1 (de) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2765528A (en) * | 1951-08-22 | 1956-10-09 | Comptoir Ind Etirage | Method of perforating a heated billet and disc |
US2812673A (en) * | 1953-08-14 | 1957-11-12 | Babcock & Wilcox Co | Mandrel guiding arrangement for billet piercing apparatus |
US3345853A (en) * | 1965-03-23 | 1967-10-10 | Babcock & Wilcox Co | Work feeding method and apparatus for piercing press |
JPS5662638A (en) * | 1979-10-23 | 1981-05-28 | Kobe Steel Ltd | Piercing method |
GB2089701A (en) * | 1980-12-18 | 1982-06-30 | Fielding Plant Design Ltd | Billet piercing or expanding presses |
CN101690965B (zh) * | 2009-10-10 | 2011-05-04 | 济南中森机械制造有限公司 | 半轴套管热挤压成形工艺及专用装置 |
DE102014014042B4 (de) * | 2014-09-26 | 2018-08-02 | Sms Group Gmbh | Mehrachsige Schmiedepresse sowie Verfahren zum Betrieb einer mehrachsigen Schmiedepresse |
-
2016
- 2016-06-28 DE DE102016211597.9A patent/DE102016211597A1/de not_active Withdrawn
-
2017
- 2017-06-27 WO PCT/EP2017/065870 patent/WO2018002060A1/de unknown
- 2017-06-27 EP EP17736591.3A patent/EP3475010B1/de active Active
- 2017-06-27 CN CN201780039925.9A patent/CN109414752B/zh active Active
Also Published As
Publication number | Publication date |
---|---|
EP3475010B1 (de) | 2020-11-25 |
CN109414752A (zh) | 2019-03-01 |
WO2018002060A1 (de) | 2018-01-04 |
CN109414752B (zh) | 2020-06-12 |
DE102016211597A1 (de) | 2017-12-28 |
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