EP3927539A2 - System eines gestells für pressen - Google Patents
System eines gestells für pressenInfo
- Publication number
- EP3927539A2 EP3927539A2 EP20710032.2A EP20710032A EP3927539A2 EP 3927539 A2 EP3927539 A2 EP 3927539A2 EP 20710032 A EP20710032 A EP 20710032A EP 3927539 A2 EP3927539 A2 EP 3927539A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- frame
- press frame
- presses
- cross
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/04—Frames; Guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
- B30B15/281—Arrangements for preventing distortion of, or damage to, presses or parts thereof overload limiting devices
-
- 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
- B21J13/04—Frames; Guides
Definitions
- the invention relates to a system of a divisible frame for presses and press frames executed according to this, wherein the respective press frame comprises side stand and head piece as an upper cross connection and a press table as a lower cross connection, which as
- Structural units form a static and dynamic forces-absorbing closed frame for any required functions of a press such as driving a ram for forming by means of tools.
- Such frame-like press frames also called O-shaped, are suitable for presses of all sizes and types and differ among others. according to their design as a two-column and column design with four columns or, in the case of multi-slide presses, such as "two plus two times the number of slide" columns.
- the invention also relates to a computer program and a control and regulating device for the system of the press frame.
- DE 102013108299 B4 describes a press frame along with a method for assembling the same and a press.
- the upper and lower members are braced against one another with tie rods, with the side stands being interposed.
- Such O-shaped press frames can be traced from a one-piece frame made of cast iron to a multi-piece frame made of welded assemblies.
- those press frames were designed to be horizontally divisible in order to be able to bypass the transitions (radii) between the head piece (upper beam) and side stand (side columns), which were critical in terms of strength and tension in the originally cast frame.
- monoblock frames made of cast material at the time were already braced with tie rods when the material properties of the cast material, for example with regard to the primary stiffness of the press, had to be compensated and / or improved.
- Such or similarly constructed press frames have to accommodate rotary or translational drives for lifting movements, equipped with upper tools and tables that have lower tools, especially in forming, cutting or punching presses.
- the press frames are to be designed according to the complex forces. This applies to all press frames as used for the types of single press, transfer presses, press lines, multi-slide presses, transfer presses.
- tie rods such as those used, among others. are documented in DE 1938279 A, DE 2239147 A, DE 2818511 C2, DE 3007975 C2 and EP 262 593 B1.
- Said tie rods should prevent the loss of the prestressing force between the individual components as a result of the tensile load on the frame during, for example, a
- the construction of the press frame is to be provided in such a way that the functionally important parts of the press, such as cross members, side stands, pressure points, tie rods, connecting rods, drive elements such as gear wheels, bearings, shafts, axles and motors, must be transportable as complete or partially prefabricated units.
- the welded parts must be designed in such a way that they can be easily manufactured using welding technology and also have a minimum of mechanical processing operations, such as for bores and surfaces to be joined, in order to be inexpensive to manufacture, space-saving to transport and assemble / disassemble.
- JP 2000332 500 A the following has been proposed for easy assembly of a frame structure for a press:
- projections with connecting surfaces are formed which fit into recesses with connecting surfaces in said parts and enable the flow of forces in the frame of the press frame during operation, with over
- Fastening elements screws or threaded rods
- the associated parts of the divisible cross connection are fixed to one another and compensating adjustment pieces are arranged between the projections and recesses.
- the split side stands are against the upper and lower respectively
- tie rods are made from high-quality forged materials and, due to the structural features (height of the upper cross connection plus height of the uprights plus height of the lower cross connection plus height of the tie rod nuts), have a considerable length. Hence a specific arises high expenditure on material and assembly costs.
- the press operator requires tall buildings with deep cellar pits for the height of the presses.
- the side stands of the press frame can be made of less valuable materials in order to satisfy the welding production processes and a permanent absorption of the dynamic load.
- Tie rods and side stands are made of different quality materials, but they are inevitably subject to the same dynamic deformation in the press frame.
- the tie rods are high-quality and cost-intensive components of a
- the press system must also be protected from damage caused by the press operation due to the enormous procurement and installation costs
- the tie-rod connection (like an expansion screw connection) of the press frame to protect against overloading or a lifting of the components from one another, on the one hand, has to be designed with a correspondingly high pre-tensioning force or residual clamping force; on the other hand, the cross-sectional areas of the tie-rod and component cross-section must also be dimensioned in a certain minimum ratio so that a minimum material use is specified is to achieve a permanent solution.
- the conventional design has to be reinforced both in the cross-section of the tie rods and in the cross-sections of a press frame or its side stand, which results in disadvantageous increases in the costs of the press.
- JP 2005-279 747 A, JP 2003-230 993 A, CN 2 500 469 Y, CN 201 394 915 Y, CN 202 045 910 U, WO 2009/064 500 Al, CN 201 264 376 Y or DE 103 44 635 A1 can be used.
- the object of the invention is to create a press frame with controllable stress states resulting from the press operation, the components of which form a frame that absorbs the dynamically and statically acting forces can be joined in a technologically advantageous manner, the press frame should have an increased fatigue strength and a reduced elastic vertical spring-back according to velz with optimized use of material.
- parts or assemblies of a respective press frame as complete or partially prefabricated structural units should be cost-effective and space-optimized worldwide after their manufacture be transportable and technologically inexpensive to assemble on site to form a fully functioning press.
- synergies resulting from the system of the press frame are to be created with a computer program and a control and regulation device.
- tie rod rigidity For the overall rigidity of the press frame forming the frame, the combination of tie rod rigidity, column rigidity and rigidity of the cross connections is important.
- Said stiffness is determined by the modulus of elasticity, the height of the components and the size of the effective cross-sections. It should be noted here that the selected steel material already has the highest modulus of elasticity of the materials in question, so that an increase in the modulus of elasticity is no longer possible.
- the component height of the press frame is functional, on the one hand, due to the geometry of the workpiece to be manufactured, and, on the other hand, physically determined by the necessary
- Press frame results from at least four side columns or, as in the case of multi-slide presses, from “two plus two times the number of slide” side columns;
- a press frame comprises arrangements of at least three side columns, the upper and lower ones
- a system of a frame for presses which comprises side stands, an upper cross connection with head piece and a lower cross connection with press table, and forms a closed and releasably joined frame that absorbs static and dynamic forces of the presses, in which a ) the side stands can be produced with an optimally determinable length and can be attached laterally or longitudinally to the cross connections by means of force-fit or force-fit and form-fit joining geometries / surfaces and detachable connecting means without tie rods,
- the side stands are subjected to tensile stress under an operating force such as the force of the presses,
- the side stands are designed in such a way that they are under
- This system is based on the more in-depth consideration, according to which a technically economic (advantage) factor from a cost factor and a stiffness ratio was considered and relationships to the spring-back behavior were examined, which is explained in more detail below with regard to the inventive-technical result or the structural-functional relationship .
- Corresponding components ram and table are specifically dimensioned in terms of their rigidity in order to ensure the usual deflection values of, for example, 0.125 mm / meter clamping surface in the ram and table.
- the head piece is set to a permissible
- this effect is counteracted by an adapted design of the material cross-sections used in the side stand.
- uprights that are under pressing force can be influenced in such a way that they deform less or more symmetrically than classic press construction allows.
- variable cross-sections of the side stand can also be implemented using additional components that can be activated, such as bracing elements, in order to adapt the rigidity and asymmetrical dimensions of the press frame to different areas of application of tools with correspondingly different requirements.
- the ram guide should also be kept as parallel (symmetrical) as possible with the smallest possible guide play in order to ensure a high quality of the parts to be manufactured, such as workpieces, a long service life of the tools and low wear of the same.
- the aim is to avoid asymmetrical deformation of the side stands (relative to one another) under operating force, in particular due to eccentric operating force.
- the side stands guide the ram with attached guide strips
- the external dimensions of the presses can be reduced as a frame construction without tie rods.
- the size and weight of assemblies such as the cross connections can be limited or reduced, so that technological processing (stress relief annealing) and logistical operations using transport systems can be carried out more cost-effectively and space-using (cranes, bridges, roads).
- an effect on the tappet guide play can also occur during the effective time of a maximum operating force.
- the uprights are relieved during the forming process and the uprights are deformed in
- Undefined direction with undefined amount In presses without tie rods, the uprights tend towards the center of the tool due to the tensile load during the forming process and cause a reduction in the guide play, which may make internal guide in the tool unnecessary.
- the press frames without tension rods designed according to the invention enable various new design options when setting up the press system.
- Foundation supports in the basement can be dispensed with, i.e. the frame stands vibration-isolated with spring elements directly on the foundation floor of a press pit.
- the invention can be used in a computer program for structural design a) the side uprights to be produced and to be attached to the cross connections by means of non-positive or non-positive and positive joint geometries and releasable connecting means without tie rod tensioning
- the invention finally comprises according to claims 31 and 32 a control and
- Control device for the system with which from a corresponding in the system
- Measuring means evaluates the data of the loads recorded in a computer and data for control measures for the elastic behavior of structural units of the press frame, in particular for the active bracing of cross-sections of the side stands that are relevant to the rigidity by means of activatable clamping elements.
- Fig. La is a force / deformation diagram (tension diagram), which shows the elastic changes in shape and dynamic loads of tensioned tie rods and side stands,
- Fig. Lb is a force / deformation diagram that shows the elastic change in shape and thus dynamic load in the side stand without tie rods
- FIG. 2 shows the structural principle of the inventive concept corresponding to FIG. 1b
- Fig. 4 details regarding joining geometries / surfaces and detachable connecting means as well as the inclusion of functional assemblies
- FIG. 6 embodiment of the press frame according to the invention with longitudinally attached side columns. Ways of Carrying Out the Invention
- FIG. 1 a initially shows a diagram of the elastic behavior of a conventionally tensioned anchor-tensioned press frame 1 according to FIG.
- the diagram corresponds to a classic screw tension diagram and shows the effect of s linking a pre-tensioned screw, here with tie rod analogous to a tie rod 6 (Fig. 3) named in the press frame 1.
- tie rod 6 Fig. 3
- tie rods 6 experience the dynamic load share and side stand 2 the dynamic load share according to this stiffness ratio s.
- a conventional preload from e.g. 1.3 x pressing force Fpl
- the suspension vl can be removed.
- the diagram illustrates the unfavorable distribution of the dynamic load on conventional tie rods and side stands owing to the state of the art in that the tie rod, which was previously made of higher quality material, absorbs a lower dynamic load than the vision stand.
- tie rod 6 causes a dynamic load distribution of 1.5: 1 and thus prevents an optimized load distribution for side stands.
- the pre-tensioning achieved by means of tie rods 6 has the disadvantage that only a so-called residual clamping force is increased with a constant pressing force Fpl while maintaining the specified spring deflection vl. If a higher pressing force Fpl is required, a correspondingly higher spring deflection vl must be accepted, which e.g. adversely affects the forming process.
- cavities / through holes are provided in side stands and cross connections such as the head piece and press table, and sufficiently dimensioned contact surfaces for the anchor nuts on the head piece and press table.
- Side stand 2 an upper cross connection with head piece 3 and a lower cross connection 4 with press table comprising structural units and forms a closed and releasably joined frame that absorbs static and dynamic forces of the presses, designed in such a way that a) the side stand 2 with a length L as a structural unit made and lateral or
- the press frame 1 has a reduced vertical spring deflection v2 compared to a press frame (1) joined by means of tie rod bracing 6.
- Fig. Lb thus illustrates the dynamic load distribution on the side stands according to the system according to the invention without the use of tie rods with a surprising springback v2, from which only the new and advantageous constructive designs in the press frame can be realized and the side stands 2 the complete dynamic caused by the pressing force Fp2 Can take up the load.
- FIG. 2 shows the structural scheme of the press frame 1 according to the invention, corresponding to FIG.
- Fig. 3 shows the scheme of a conventional design with the height L of the side stand 2, this height disadvantageously protruding tie rods 6, which brace the side stand 2 and upper cross connection such as head piece 3 and lower cross connection such as press table 4, and with an unfavorable, the Final assembly dimension B same transport dimension b.
- Multi-slide presses compact suction presses, transfer presses
- ⁇ a design creation of stiffness-relevant cross-sections in the side posts 2 by means of active bracing in order to obtain an additional cross-section to increase the stiffness, equal to the inner or outer cross-section;
- Connection means 5.1 including an overload protection according to the pressing forces acting
- Frame that receives tie-rod bracing and has at least one structural unit or transport unit for receiving functional assemblies 7 of the press in the transport or operating state;
- the structural features or properties are implemented or characterized in the press frame 1 by the following features that can be used individually or in combination:
- the press frame 1 has an advantageous flow of force which is influenced by the position and shape of the joining geometries 5 and connecting means 5.1 and has a positive effect on the deformation and local stress states of the press.
- the press frame 1 has one of the bends in the cross connections 3, 4
- the press frame 1 has the following automatically in its pre-tensioning force
- Connection means 5.1 to compensate for run-in and settlement phenomena in the connection such as joining geometry 5 by means of at least one
- the press frame 1 is through the inlet side and outlet side of the press or
- the press stage is constructed in such a way that the different, also phase-shifted stage forces are appropriately counteracted and the tendency for the (asymmetrical) overall deformation of the press frame 1 under operating force is reduced.
- the press frame 1 has a reduced ram guide play, especially in the effective range of the max. Operating force located version without internal tool guidance.
- the press frame 1 has sliding elements inserted locally or over a large area in the joining geometries 5 for the targeted generation of relative movements between the side stand 2 and cross connections 3, 4.
- press frame 1 can be designed with the following features according to the invention:
- adjacent side stands 2 are connected with cross members (longitudinal, transverse and diagonal) to increase the overall rigidity of the press frame 1.
- At least one functional module 7 is o a drive unit for automation or
- the releasable connecting means 5.1 are the axially mounted axle bolts and
- At least one clamping element that can be activated hydraulically, electromotive, pneumatically, thermally or by sensors can be used for functions or devices such as e.g. for overload protection or for tappet weight compensation.
- the press frame 1 is advantageously designed as a detachably joined frame by means of side stands 2 with different heights L and / or upper and lower cross connections 3, 4 with different widths b.
- side stands 2 with the length L can be joined laterally or longitudinally to the cross connections 3, 4 by means of the force-fit or force-fit and form-fit joining geometries 5 and releasable connecting means 5.1, it is made possible for special cases and or
- any on-site site conditions of a press operator can be met by adapting each press frame by means of various configurations of lateral or longitudinal joining types, different lengths or widths of the side stands or the upper and lower cross connections.
- the press frame 1 can also be designed advantageously
- Vibration-damping materials such as granulate, sand, are stored in the side stand 2.
- tie rods and anchor nuts allow more constructive freedom in the design / location of the press table, so that a vibration-isolating installation (spring elements) can be optimally placed and dimensioned, and the previously costly and time-consuming tightening of the anchor nuts with the help of final assembly present at the operator, to be transported there and back
- the load-bearing walls of the side stand 2 can be reinforced inward by using thicker sheets up to and including a solid stand.
- the typical cross-section of the side stand 2 can be designed in sections in an open or closed, symmetrical or asymmetrical shape in order to specifically influence the deformation of the side stand 2 or to accommodate functional assemblies 7 in a space-optimized manner.
- the play of a press-specific slide guide is specifically influenced by the rigidity design of certain sections in the side stand 2 in such a way that an advantageously small play can be set during or shortly before the forming process.
- the side stands 2 can then be dimensioned differently according to the load distribution.
- Vacant cavities in the side stands 2 can be used for other purposes, in order, according to FIG. 4, to function assemblies 7, such as e.g. Additional units,
- Functional assemblies 7 of the press automation can be integrated between two side stands 2 as a supporting / stiffening part of the press frame 1. At the same time, a three-part unit as a preassembled assembly would make assembly work easier for the operator.
- a control and regulating device for the system according to the invention of a frame for presses comprises a) at least one, preferably strain gauge, corresponding in the system
- the scope of the invention includes the targeted use of less expensive material that is very easy to process in terms of welding technology and is available worldwide.
- the system according to the invention of the targeted change in the rigidity of the press frames by eliminating the vertical prestressing causes flexibility or expansion of the areas of application of the presses.
- the tool to be used e.g. for cutting tools an increased
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Presses And Accessory Devices Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019001285.2A DE102019001285A1 (de) | 2019-02-23 | 2019-02-23 | System eines Gestells für Pressen und Pressengestell |
| PCT/DE2020/100083 WO2020169146A2 (de) | 2019-02-23 | 2020-02-08 | System eines gestells für pressen und pressengestell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3927539A2 true EP3927539A2 (de) | 2021-12-29 |
| EP3927539B1 EP3927539B1 (de) | 2024-08-28 |
Family
ID=69779701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20710032.2A Active EP3927539B1 (de) | 2019-02-23 | 2020-02-08 | System eines gestells für pressen |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US12187003B2 (de) |
| EP (1) | EP3927539B1 (de) |
| JP (1) | JP7522751B2 (de) |
| CN (1) | CN113825629B (de) |
| DE (1) | DE102019001285A1 (de) |
| ES (1) | ES2989900T3 (de) |
| WO (1) | WO2020169146A2 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116175065B (zh) * | 2023-02-14 | 2025-12-19 | 中船发动机有限公司 | 一种快速成型压力机框架的装配方法及获得的压力机框架 |
Family Cites Families (44)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE919031C (de) * | 1940-01-12 | 1954-10-11 | August Wachter | Staender, Gehaeuse, Rahmengestell od. dgl. fuer Werkzeugmaschinen, insbesondere Pressen |
| CH504961A (de) | 1969-03-24 | 1971-03-31 | Von Roll Ag | Presse |
| DE2239147A1 (de) * | 1972-08-09 | 1974-02-21 | Albert Welter | Pressengestell |
| JPS5514474Y2 (de) * | 1974-09-10 | 1980-04-02 | ||
| US4063453A (en) * | 1977-03-03 | 1977-12-20 | Mts Systems Corporation | Adjustable space frame for testing machine |
| DE2818511C2 (de) * | 1978-04-27 | 1979-06-13 | G. Siempelkamp Gmbh & Co, 4150 Krefeld | Pressenrahmen |
| DE3007975C2 (de) | 1980-03-01 | 1981-09-03 | G. Siempelkamp Gmbh & Co, 4150 Krefeld | Pressenrahmen, bei dem Oberholm, Unterholm und Ständer durch Spannelemente zusammengespannt sind |
| US4615208A (en) * | 1984-03-02 | 1986-10-07 | Hailey Robert W | Hydraulic press frame |
| JPS6118811U (ja) * | 1984-07-09 | 1986-02-03 | 株式会社 三石深井鉄工所 | レンガプレスのフレ−ム構造 |
| EP0262593B1 (de) * | 1986-09-29 | 1992-01-08 | Aida Engineering Ltd. | Gestell für eine Presse |
| JPH04147800A (ja) * | 1990-10-08 | 1992-05-21 | Aida Eng Ltd | プレス機械 |
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| DE4239641A1 (de) * | 1992-11-26 | 1994-06-01 | Schloemann Siemag Ag | Gerüstständer |
| JP2739291B2 (ja) * | 1994-10-20 | 1998-04-15 | 日清紡績株式会社 | プレスユニット及び該プレスユニットを用いたトランスファープレス |
| JPH08197296A (ja) * | 1995-01-20 | 1996-08-06 | Komatsu Ltd | プレス機械のスライドガイド調整装置 |
| DE19704776A1 (de) | 1997-02-08 | 1998-08-20 | Helga Wanzke | Pressenoberteil |
| JPH10314996A (ja) * | 1997-05-19 | 1998-12-02 | Aida Eng Ltd | トランスファプレス |
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| JP2000343297A (ja) | 1999-06-04 | 2000-12-12 | Aida Eng Ltd | プレス機械のフレーム |
| JP2001079696A (ja) | 1999-09-13 | 2001-03-27 | Komatsu Ltd | プレス機械 |
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| CN104438849A (zh) * | 2014-12-05 | 2015-03-25 | 柳州市顺菱汽车配件有限责任公司 | 汽车配件加工用防回弹弯折模具 |
| JP6013546B1 (ja) | 2015-04-06 | 2016-10-25 | 久野金属工業株式会社 | プレス機械 |
| DE202015102390U1 (de) * | 2015-05-11 | 2016-07-12 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Kontinuierlich arbeitende Presse |
| CN105170787B (zh) * | 2015-09-25 | 2018-09-28 | 嵊州市康力机械有限公司 | 一种应用于精冲压力机的八面滑块导轨调整机构 |
| DE102016103927A1 (de) * | 2016-03-04 | 2017-09-07 | Sms Group Gmbh | Schmiedepresse und Verfahren zum Schmieden eines Werkstücks in einer Schmiedepresse |
-
2019
- 2019-02-23 DE DE102019001285.2A patent/DE102019001285A1/de not_active Ceased
-
2020
- 2020-02-08 US US17/432,914 patent/US12187003B2/en active Active
- 2020-02-08 JP JP2021548572A patent/JP7522751B2/ja active Active
- 2020-02-08 ES ES20710032T patent/ES2989900T3/es active Active
- 2020-02-08 EP EP20710032.2A patent/EP3927539B1/de active Active
- 2020-02-08 CN CN202080016181.0A patent/CN113825629B/zh active Active
- 2020-02-08 WO PCT/DE2020/100083 patent/WO2020169146A2/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| EP3927539B1 (de) | 2024-08-28 |
| JP2022521900A (ja) | 2022-04-13 |
| WO2020169146A3 (de) | 2020-10-15 |
| US12187003B2 (en) | 2025-01-07 |
| CN113825629A (zh) | 2021-12-21 |
| ES2989900T3 (es) | 2024-11-28 |
| CN113825629B (zh) | 2024-03-19 |
| US20220194041A1 (en) | 2022-06-23 |
| WO2020169146A2 (de) | 2020-08-27 |
| JP7522751B2 (ja) | 2024-07-25 |
| DE102019001285A1 (de) | 2020-08-27 |
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