EP3010709A1 - Method for warping the machine bed and/or the press ram of a punching press and punching press - Google Patents
Method for warping the machine bed and/or the press ram of a punching press and punching pressInfo
- Publication number
- EP3010709A1 EP3010709A1 EP13859602.8A EP13859602A EP3010709A1 EP 3010709 A1 EP3010709 A1 EP 3010709A1 EP 13859602 A EP13859602 A EP 13859602A EP 3010709 A1 EP3010709 A1 EP 3010709A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- machine bed
- press
- press ram
- ram
- punching
- 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
- 238000004080 punching Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims description 32
- 239000010687 lubricating oil Substances 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 8
- 239000002699 waste material Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 2
- 238000010792 warming Methods 0.000 claims description 2
- 230000000977 initiatory effect Effects 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000009413 insulation Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 239000002184 metal Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000009740 moulding (composite fabrication) Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004049 embossing Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001900 immune effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 210000002105 tongue Anatomy 0.000 description 1
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
- B30B15/042—Prestressed frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/007—Means for maintaining the press table, the press platen or the press ram against tilting or deflection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/34—Heating or cooling presses or parts thereof
Definitions
- the present invention relates to a method for buckling the machine bed and / or the press ram of a punch press for at least partial compensation of a punching force induced deflection in the punching operation and a punch press, in particular for carrying out the method, according to the preambles of the independent claims.
- EP 0 653 254 A2 discloses a press in which support units are arranged between the press bed and the tool clamping plate, which can be adjusted in height. These support units can be of mechanical, electromechanical or hydraulic type and operated by means of a control such that a deformation of the tool clamping plate is counteracted under the working pressure of the press. It is also possible, with these support units to cause a protrusion of the platen to compensate for tool types.
- DE 44 15 577 A1 discloses a machine table with a tool clamping plate for presses in the field of metal forming, in which a plate and the platen a plurality of hydraulic compensating piston are arranged. There are displacement and bending sensors and a suitable control available for controlling the pressure in the compensation piston such that a deformation of the platen is counteracted under the working pressure of the press.
- EP 0 653 254 A2 and DE 44 15 577 A1 basically have the disadvantage that they are mechanically complex and therefore expensive and expensive to manufacture and maintain, and that they are due to the construction with multiple punctual support of the Tool clamping plate in the punching force direction on a underlying support structure for the required height allow a relatively low structural rigidity.
- a further disadvantage of the variants with hydraulic support units / compensating pistons is that the supporting oil cushion has a low rigidity in the punching force direction and the unavoidable deformations of the entire hydraulic system under the oil pressure generated by the support pressure results in compression of the support lead under the punching load.
- a first aspect of the invention a method of warping of the machine bed and / or of the press ram of a punch press for at least partial compensation ⁇ a punching force-induced deflection of the machine bed or of the press ram in the punching operation.
- a temperature gradient is generated by which the machine bed moves in the direction of the press ram.
- the inventive method can machine beds and press ram of stamping presses with a very low investment outlay for the purpose of at least partial compensation of punching force induced deflections vorver shapes, without existing and proven structural concepts must be deviated. This is of particular importance in the field of high-speed, high-speed stamping presses, as it often requires years of detailed work to optimize the press structures with regard to their dynamic behavior and their service life. In addition, the inventive method can be used with little effort even with existing presses.
- the temperature gradient causing the warping is generated by heating the machine bed in the region of its side facing the press ram or by heating the press ram in the region of its side facing the machine bed.
- the local heating is a particularly simple and often host ⁇ nomic method for generating a temperature gradient, especially in product often ionsanlagen waste free is available.
- the temperature gradient by cooling the machine bed in the region of its side facing away from the press ram or by cooling the press ram in the region of its side facing away from the machine bed. This method is particularly useful when these machine components are very warm during operation and can be locally cooled in this way, without leading to dew point falls with condensation on the machine parts.
- flow channels arranged within the machine bed or within the press ram are flowed through by a heated or cooled, gaseous or liquid medium.
- a heated or cooled, gaseous or liquid medium for example, heated lubricating oil of a lubricating oil circuit of the press can be used, which before cooling by the Flow channels is performed.
- the latter method has the advantage that no additional energy is needed for heating.
- electrical heating elements are arranged within the machine bed or within the press ram and supplied with electric current for generating heat.
- the temperature gradient is generated by arranging a clamping plate on the machine bed, which is heated.
- the method is a platen and arranged between the machine bed and the platen, a heating device on the machine bed, which is heated.
- the machine bed is heated by means of the heated platen or by means of arranged between the machine bed and the platen heater on its side facing the plunger, with the result that there is a warping of the machine bed in the direction of the press ram to come.
- the platen is shear-resistant connected to the machine bed, directly or via the heater.
- the warping of the machine bed in the direction of the press ram can also occur exclusively as a result of introduction of thrust forces generated by thermal expansion of the clamping plate into the side of the machine bed facing the ram, or also in combination with a heating of the machine bed by the platen or the heater.
- the Ver ⁇ vaulting of the machine bed or the press ram is set depending on parameters of the stamping process, for example, depending on a previously calculated or product-specific punching force or measured during operation maximum punching force , Furthermore, it is preferred that the warping be adjusted during the intended operation of the press. In this way, the respective operating situation can be particularly well taken into account and any changes, for Example due to increasing tool wear, be taken into account.
- a second aspect of the invention relates to a punch press which is suitable for carrying out the method according to the first aspect of the invention.
- the punch press has a machine bed and a press ram working against the machine bed. Further, the punch press comprises means for arching the machine bed in the direction of the press ram and / or for buckling the press ram towards the machine bed by creating a temperature gradient within the machine bed or a support structure for the lower tool parts formed with the machine bed / or within the press ram or a support structure formed with the press ram for the upper tool parts.
- the invention makes it possible to cost-effective high-precision high-speed high-performance stamping press ⁇ to provide without departing from proven concepts structure with deflection compensation.
- the means for arching the machine bed or the press ram are designed such that the machine bed can be heated in the region of its side facing the press ram or the press ram in the region of its side facing the machine bed Effecting the warping due to uneven heating with corresponding uneven spatial extent of the same.
- the means for buckling the machine bed or the press ram are designed such that the machine bed in the region of its side facing away from the press ram or the press ram can be cooled in the region of its side facing away from the machine bed, causing the warping due to a uneven cooling with corresponding uneven spatial shrinkage of the same.
- the stamping press according to the invention can have a wide variety of devices:
- stamping press flow channels are arranged within the machine bed or within the press ram, wel ⁇ che in the best immunological operation of the press with a heated or cooled, gaseous or liquid Me ⁇ medium can be flowed through to generate the temperature gradient.
- means are provided with which in the intended operation of the press heated lubricating oil of a lubricating oil circuit of the press can be guided through the flow channels, for generating the temperature gradient.
- This solution is energeti ⁇ sch particularly advantageous because virtually no heating energy is needed to provide the heat.
- electrical heating elements are arranged within the machine bed or inside the press ram, in particular resistance heating elements, which can be supplied with electrical current in the intended operation of the press, for generating the temperature gradients causing the warping.
- resistance heating elements which can be supplied with electrical current in the intended operation of the press, for generating the temperature gradients causing the warping.
- the punch press arranged on its machine bed on a platen, which during the normal operation of the press, in particular electrically, is heated.
- the punch press has a clamping plate arranged on its machine bed, wherein between the machine Bed and the platen a particular electric heater is arranged, which can be operated during the operation of the press according to the intended use.
- the platen or arranged between platen and machine bed heater so connected to the machine bed that the platen when heated, or that the heater when it is operated, the machine bed on his heated to the side facing the plunger, to produce the warping causing temperature gradient.
- the platen is shear-resistant connected to the machine bed, directly or via the heater.
- the heated platen or the heating device arranged between the platen and the machine bed is thermally substantially decoupled from the machine bed, so that heating of the platen or operation of the heater substantially heats up and corresponding expansion of the clamping plate comes, which as a result of the thrust-rigid coupling of the same to the machine bed, the warping of the machine bed in the direction of the press ram is to be effected.
- the clamping plate is so connected to the machine bed, that when it is heated, the Maschi ⁇ nenbett heated on its side facing the plunger facing side, and is arranged between clamping plate and the machine bed heater such with the clamping plate and the machine bed connected, that when it is operated, it heats the platen and the machine bed on its side facing the plunger heated.
- the means for warping the machine bed are designed to match the temperature gradient within the machine bed generate such that the machine bed in the area adjacent to the breakthrough more curved than in the areas adjacent to its longitudinal sides. In this way, an improved compensation of the deflection results under embossing load, since the machine bed in such pressing under cutting load in the area around the aperture through ⁇ bend undergoes typically greater than in the region of its longitudinal sides.
- the means for arching the machine bed are designed in such a way that the machine bed can be heated with them in the area of its side facing the press bump near the boundaries of the opening or can be heated more strongly in these areas than in the vicinity of Long sides.
- the means for buckling the machine bed are designed for this purpose such that the machine bed with them in the region of its side facing away from the press ram in the vicinity of the Begren- tongues of the breakthrough can be cooled or can be more cooled in these areas than in the vicinity of the long sides.
- the means for buckling the machine bed or the press ram are adjustable, preferably during the intended operation of the press, so that a targeted and adapted to the ⁇ respective operating case setting the Verwöl ⁇ tion of the machine bed or the press ram is possible ,
- the punch press preferably has a press control with which the warpage of the machine bed or press ram, preferably automatically, is adjustable as a function of parameters of the stamping process, preferably as a function of a calculated or product-specific punching force or a maximum measured during operation Punching force, preferably during normal operation of the press.
- a process control with automatic adjustment of the warping of the machine bed or the press ram to the respective operating conditions is possible.
- FIG. 1 shows a sectional view through a stamping machine with upper drive.
- FIG. 3 shows an illustration like FIG. 2 through the substructure of a first punching machine according to the invention
- FIG. 4 shows a representation like FIG. 2 through the substructure of a second punching machine according to the invention
- Fig. 6 is a sectional view through another inventive punching machine with sub-drive. Ways to carry out the invention
- a punching machine is shown with top drive, wherein the machine head is shown cut with the drive 1, the plunger 2 and the slide guides 3 in the longitudinal direction, while the machine base is shown not cut with the clamping plate 4 and the machine bed 5.
- Fig. 2 shows a section through the machine base of the stamping machine along the line X-X in Fig. 1, as it is formed according to the prior art.
- the clamping plate 4 is arranged on the machine bed 5 and has in the center an opening 6a, which opens in the direction of gravity in a centrally arranged in the machine bed 5 opening 6b.
- the openings 6a, 6b are used to carry away punched parts and waste from the punching zone.
- the machine bed 5 forms a closed cavity 7a, 7b on both sides of the opening 6b, which serves as a tank for the lubricating oil 8 of the lubricating oil circuit of the stamping machine.
- the machine bed 5 is heated more strongly by the warm lubricating oil 8 in its lower region than in its upper region, whereby it cambers already without punching force load by different thermal expansion downwards. Under load due to the punching force, an additional bending of the machine bed 5 occurs during operation The result is a corresponding loss of precision and increased tool wear.
- Fig. 3 shows a section through the machine base of the stamping machine along the line XX in Fig. 1, as it is formed according to a first embodiment of the invention.
- the outer contours of the clamping plate 4 and the machine bed 5 are identical here as in the embodiment according to FIG. 2.
- the inner structure of the machine bed 5 differs significantly from that of FIG. 2.
- the machine bed 5 on both sides of the opening 6b two superposed closed cavities 9a, 9b; 9c, 9d, of which only the upper 9a, 9c serve as a tank for the lubricating oil 8 of the lubricating oil circuit of the punching machine.
- the machine bed 5 has three flow channels 10a, 10b, 10c arranged side by side on both sides of the opening 6b; lOd, lOe, lOf, of which in each case the flow channels 10c, 10d closest to the aperture 6b have a significantly larger flow cross-section than the other flow channels 10a, 10b, 10e, 10f.
- the flow channels 10a-10f are maten in operation from Warming ⁇ th lubricating oil 8 of the lubricating oil circuit of the Stanzauto- flows through, which is then passed into the cavities 9a, 9c, from where it with the lubricating oil pump of the lubricating oil circuit, if appropriate after prior through a cooler, again led to the lubrication points of the punching machine.
- the warm lubricating oil 8 is first passed through the flow channels 10c, 10d closest to the opening 6b, then through the middle flow channels 10b, 10e and finally through the outer flow channels 10a, 10f, where it gives off heat to the machine bed 5.
- the machine bed 5 is heated more in operation in its upper region than in its lower region, causing it as a result of different thermal expansion to the top and thus arched in the direction of the plunger 2.
- the machine bed 5 due to the order of flow through the flow channels and the different flow channel cross-sections in the areas adjacent to the opening 6b is heated more than in the areas of its longitudinal sides, resulting in a greater Verwölbung the same upwards in the areas adjacent to the opening 6b leads than in the areas of its long sides.
- the clamping plate 4 which is fastened with a plurality of screws on the machine bed 5, follows the warping of the machine bed 5.
- the machine bed 5 ideally under maximum Stanzkraftbelastung both longitudinally and transversely flat, ie not warped or not bent, is.
- a loss of punching precision and increased tool wear can be effectively counteracted.
- Fig. 4 shows a section through the machine base of the stamping machine along the line XX in Fig. 1, as it is formed according to a second embodiment of the invention.
- the outer contours of the platen 4 and the machine bed 5 are identical to those of the embodiment according to FIG. 2, and also the internal construction of the machine bed 5 is identical to that of the machine bed of FIG. 2.
- the warm water is first through the boundaries of the opening 6b in the machine bed 5 closest flow channels 10d, 10e, 10h, 10i, then through the inner and middle flow channels 10c, 10f, 10g, 10j arranged thereat, and finally through the outer flow channels 10a, 10b, 10k, 101.
- the intermediate plate 11 is replaced by the Warm water circuit heated and in turn heats the abutting them contact surfaces of the machine bed 5 and the platen 4.
- the machine bed 5 is more heated in its upper portion than in its lower portion, which is due to different thermal expansion upwards, ie in the direction on the plunger 2 to, warped.
- the machine bed 5 bulges more strongly in the areas adjacent to the opening 6b than in the areas of the longitudinal sides , which are less strongly heated by the outer flow channels 10a, 10b, 10k, 101.
- the clamping plate 4, which is shear-rigid manner on the intermediate plate 11 to the machine bed 5 and made of a material 5 is ge forms ⁇ with a larger thermal expansion coefficient than the material of the machine bed, passes additional shear forces in the Ma ⁇ schin bed 5 an which the warpage after reinforce above.
- a punching machine according to the invention is shown with top drive, wherein the machine base cut with the drive 1 in the transverse direction is shown and the plunger 2 is shown partially cut.
- the clamping plate 4 is not shown cut.
- the plunger 2 which is driven and guided by tension columns 3, in the region of its underside a plurality of longitudinal bores, which are penetrated by resistance heating elements 12. These are subjected to electrical current during operation, whereby the plunger 2 is heated more in the region of its lower side than in its upper region and consequently as a result of differential thermal expansion downwards, i. towards the machine bed 5 to, warped.
- the plunger 2 under ideal conditions, is under maximum punching force load even, ie. not warped or not bent, is.
- a loss of punching precision and increased tool wear can be effectively counteracted.
- FIG. 6 shows another punching machine according to the invention with top drive, which differs from that shown in FIG. 5 only in that heating elements 12 are not arranged in the plunger 2 itself, but in an intermediate plate 11 which secures the upper tool parts serves on the plunger 2.
- the effect achieved here is identical to that described above, but this solution has the advantage that existing machines with a corresponding intermediate plate 11 can be easily converted into a stamping press according to the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Presses And Accessory Devices Thereof (AREA)
- Press Drives And Press Lines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CH2013/000107 WO2014201576A1 (en) | 2013-06-19 | 2013-06-19 | Method for warping the machine bed and/or the press ram of a punching press and punching press |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3010709A1 true EP3010709A1 (en) | 2016-04-27 |
EP3010709B1 EP3010709B1 (en) | 2022-06-01 |
Family
ID=48782803
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13859602.8A Active EP3010709B1 (en) | 2013-06-19 | 2013-06-19 | Method for warping the machine bed and/or the press ram of a punching press and punching press |
EP13736464.2A Not-in-force EP3010708B1 (en) | 2013-06-19 | 2013-06-27 | Method for bending the machine bed of a stamping press, and stamping press |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13736464.2A Not-in-force EP3010708B1 (en) | 2013-06-19 | 2013-06-27 | Method for bending the machine bed of a stamping press, and stamping press |
Country Status (6)
Country | Link |
---|---|
US (2) | US20160144588A1 (en) |
EP (2) | EP3010709B1 (en) |
JP (2) | JP6192820B2 (en) |
ES (1) | ES2663233T3 (en) |
SG (2) | SG11201510310VA (en) |
WO (2) | WO2014201576A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SG11201510310VA (en) * | 2013-06-19 | 2016-01-28 | Bruderer Ag | Method for warping the machine bed and/or the press ram of a punching press and punching press |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6171199A (en) * | 1984-09-13 | 1986-04-12 | Mitsui Seiki Kogyo Kk | Method for circulating lubricant of straightside press |
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-
2013
- 2013-06-19 SG SG11201510310VA patent/SG11201510310VA/en unknown
- 2013-06-19 WO PCT/CH2013/000107 patent/WO2014201576A1/en active Application Filing
- 2013-06-19 US US14/899,775 patent/US20160144588A1/en not_active Abandoned
- 2013-06-19 JP JP2016520210A patent/JP6192820B2/en not_active Expired - Fee Related
- 2013-06-19 EP EP13859602.8A patent/EP3010709B1/en active Active
- 2013-06-27 ES ES13736464.2T patent/ES2663233T3/en active Active
- 2013-06-27 WO PCT/CH2013/000114 patent/WO2014201577A1/en active Application Filing
- 2013-06-27 EP EP13736464.2A patent/EP3010708B1/en not_active Not-in-force
- 2013-06-27 US US14/899,852 patent/US20160136710A1/en not_active Abandoned
- 2013-06-27 SG SG11201510311QA patent/SG11201510311QA/en unknown
- 2013-06-27 JP JP2016520211A patent/JP6192821B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6171199A (en) * | 1984-09-13 | 1986-04-12 | Mitsui Seiki Kogyo Kk | Method for circulating lubricant of straightside press |
Non-Patent Citations (1)
Title |
---|
See also references of WO2014201576A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20160136710A1 (en) | 2016-05-19 |
SG11201510310VA (en) | 2016-01-28 |
US20160144588A1 (en) | 2016-05-26 |
WO2014201577A1 (en) | 2014-12-24 |
JP6192821B2 (en) | 2017-09-06 |
EP3010708B1 (en) | 2017-12-20 |
EP3010708A1 (en) | 2016-04-27 |
ES2663233T3 (en) | 2018-04-11 |
JP6192820B2 (en) | 2017-09-06 |
JP2016523715A (en) | 2016-08-12 |
SG11201510311QA (en) | 2016-01-28 |
JP2016524540A (en) | 2016-08-18 |
EP3010709B1 (en) | 2022-06-01 |
WO2014201576A1 (en) | 2014-12-24 |
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